JP6485937B2 - Door opening and closing device - Google Patents

Description

  The present invention relates to a door opening and closing device that opens and closes a door by stepping on a stepping platform by a person passing through an entrance and releasing the stepping.

  2. Description of the Related Art Conventionally, various door opening / closing devices that open a door when a person passing through an entrance / exit steps on a platform, so-called semi-automatic door opening / closing devices have been proposed. For example, Patent Literature 1 discloses a door opening / closing device that opens a sliding door by applying a stepping force acting on a tread plate to an opening rail fixed to the sliding door. In the apparatus described in Patent Document 1, the gravity of the adjustment weight always acts on the opening rail, and when the stepping plate is released, the sliding door is closed by the gravity of the adjustment weight. When the stepping plate is released, the stepping plate returns to a predetermined raised position due to the gravity of the adjustment weight.

  Generally, as described in Patent Document 1, a step board that can be raised and lowered is rotatably attached to ends of a plurality of levers that are rotatably supported on a floor surface. For example, the mechanism for supporting the tread on the floor by two levers is composed of two levers, a tread, and a parallel link mechanism in which a part of the floor is a link, like the tread mechanism described in Patent Document 2. Is done.

Japanese Patent No. 4253034 JP 2012-251420 A

  The tread board is disposed so as to extend in front of the doorway where the door such as a sliding door opens and closes, and has a stepping surface having an area corresponding to the size of the doorway. A person who passes through the doorway does not always step on the center position of the stepping surface of the tread board. For this reason, when a person who passes through the doorway steps on a position close to the edge portion of the tread board, the tread surface of the tread board supported by the parallel link mechanism may be inclined. In this case, the tread plate cannot be lowered with a predetermined stroke, and the open / close door may not be smoothly opened.

  Then, this invention is made | formed in view of said situation, and it aims at providing the door opening / closing apparatus which can raise / lower a step stand smoothly irrespective of the stepping position of the person who passes an entrance / exit.

(First Invention Aspect and Specific Embodiments)
According to a first aspect of the present invention, the door support mechanism that supports the door that opens and closes the door in an openable and closable manner, the step board that is disposed in the vicinity of the doorway, and the floor surface or the floor surface is fixed. A step support mechanism that supports the step so that it can be moved up and down with respect to a member, an opening operation mechanism that applies a stepping force that acts on the step to the door as a force that opens the door, and a connecting member. A first link having two links , the middle part of which is pivotally connected to each other about a first axis for raising and lowering the platform in a parallel posture with respect to the floor surface or a member fixed to the floor surface An intermediate portion is pivotally connected to each other about a second axis parallel to the first axis in order to raise and lower the platform in a parallel posture with respect to the mechanism and the floor surface or a member fixed to the floor surface. Second link mechanism having two links , And two of the four ends of the two links of each link mechanism are pivoted to a floor surface or a member fixed to the floor surface and a step or a member fixed to the step The other two ends of the four ends of the two links of each link mechanism are rotatably supported as ends, and the other two ends are fixed to the floor surface or a member fixed to the floor surface and the step platform or the step platform. The direction of the first link mechanism from one rotation end to the specific first slide end is one rotation of the second link mechanism. In the arrangement relationship of the two link mechanisms in the same direction as the direction from the end toward the specific second sliding end, the connecting member is a first connecting portion located in a range from the first axis to the specific first sliding end. And a second position located in a range from the second axis to the specific second sliding end. Coupled between the binding section, the first link mechanism and the second link mechanism, which is configured to be spaced apart in a direction perpendicular to the first axis.

  In the first aspect of the invention, the platform may be composed of an integrated platform extending over the first region and the second region located on both sides of the gateway in the direction passing through the gateway, You may be comprised from two separate springs arrange | positioned separately.

  In the first aspect of the invention, the opening operation mechanism is not limited as long as it has a structure in which a stepping force is applied to the door as a force for opening the door. For example, the structure which makes a stepping force act on a door as force which presses the action rail fixed to a door and extended in an opening-and-closing direction may be sufficient. Moreover, the structure which supports the door which can be opened and closed so that rocking is possible, and rocks the rail by stepping force may be sufficient.

  In the first aspect of the invention, the specific configuration for closing the door when the step of the step is released is not limited. For example, the structure which makes the gravity of a weight act on a door may be sufficient, and the structure which makes the elastic force of elastic members, such as a spring, act on a door may be sufficient.

  In the first aspect of the invention, the step support mechanism may be configured to include at least two link mechanisms in order to support the step so that it can be moved up and down. However, in order to make the raising / lowering operation of the step platform even smoother, the step support mechanism preferably includes three or more link mechanisms.

  In the first aspect of the invention, the four ends of the two links of each link mechanism are respectively supported by the floor surface or a member fixed to the floor surface and the step or the member fixed to the step. Various forms are conceivable. For example, both ends of one of the two links are rotatably supported by a floor surface or a member fixed to the floor and a step or a member fixed to the step, and both ends of the other link However, the structure which is each slidably supported by the floor surface or the member fixed to a floor surface, and a step or a member fixed to a step may be sufficient.

  In the first aspect of the invention, various configurations are conceivable as specific configurations for slidably supporting the remaining two ends of the four ends of the two links of each link mechanism. For example, the shaft may be fixed to the end of the link, and a bearing member having a long hole in which the shaft can slide may be fixed to a step or a member fixed to the step. A structure may be adopted in which a long hole is formed at the end, and a shaft that fits and slides in the long hole is fixed to a step or a member fixed to the step.

  In the first aspect of the invention, the first connecting portion may be a shaft portion on the first axis, but is preferably a specific first sliding end. Further, the second connecting portion may be a shaft portion on the second axis, but is preferably a specific second sliding end.

  According to a specific aspect of the present invention, the connecting member connects between the specific first sliding end as the first connecting portion and the specific second sliding end as the second connecting portion.

(Second Invention Aspect and Specific Aspect thereof)
The second aspect of the invention according to claim 3 is fixed to the door support mechanism that supports the door that opens and closes the door in an openable and closable manner, a step board that is disposed in the vicinity of the doorway, and the floor surface or the floor surface. A step support mechanism that supports the step so that it can be moved up and down with respect to a member, an opening operation mechanism that applies a stepping force that acts on the step to the door as a force that opens the door, and a connecting member. A first link and a second link in which the intermediate portion is pivotally connected to each other around the first axis in order to raise and lower the platform in a parallel posture with respect to the floor surface or a member fixed to the floor surface. In order to raise and lower the stepping platform in a parallel posture with respect to the first link mechanism and the floor surface or a member fixed to the floor surface, the intermediate portion can rotate around the second axis parallel to the first axis 3rd link and 4th connected to Wherein a second link mechanism having a link, the one end and one end of the second link of the first link on the same side with respect to the first axis includes a member fixed to the floor, or a floor, platform , Or a member fixed to the platform, and is pivotally supported as a rotation end. The other end of the first link and the other end of the second link are a platform, a member fixed to the platform, and a floor. And a member fixed to the surface or the floor surface are slidably supported as sliding ends, respectively, and one end of the third link and one end of the fourth link located on the same side with respect to the second axis are the floor The other end of the third link and the other end of the fourth link are respectively supported as a rotation end by a member fixed to the surface or the floor and a step or the member fixed to the step. A step or a member fixed to the step; And a member fixed to the surface or the floor surface are slidably supported as sliding ends, and the direction from one end of the first and second links to the other end is from one end of the third and fourth links. The first link mechanism and the second link mechanism are arranged to be in the same direction as the direction toward the other end, and the connecting member is a first connecting portion located in a range from the first axis to the other end of the first link. And the second connecting portion located in the range from the second axis to the other end of the third link, or the first connecting portion and the second located in the range from the first axis to the other end of the second link. It connects between the 2nd connection part located in the range from an axis to the other end of the 4th link , and the 1st link mechanism and the 2nd link mechanism are arranged at intervals in the direction orthogonal to the 1st axis. It is the composition which is done .

  In the specific aspect of Claim 4, a connection member is the floor surface or the other end of the 2nd link as a 1st connection part slidably supported by the member fixed to a floor surface, and a floor surface Or the other end of the fourth link as the second connecting portion slidably supported by the member fixed to the floor surface.

In this specific aspect , the first distance between one end of the first link or the third link supported by the floor surface or a member fixed to the floor surface and the first axis or the second axis of the intermediate portion is , the other end of the second link or fourth link being supported by a member fixed to the floor or floor surface, the same as the second distance between the first axis or the second axis of the intermediate portion, The third distance between the other end of the first link or the third link supported by the step or the member fixed to the step and the first axis or the second axis of the intermediate portion is fixed to the step or the step one end of the second link or fourth link being supported by a member which is may be the same as the fourth distance between the first axis or the second axis of the intermediate section.

  In this specific aspect, the first distance may be the same as the third distance or may be different from the third distance.

In this specific aspect , all of the first distance to the fourth distance may be the same.

In the specific aspect of Claim 5 , each link of a 1st link and a 2nd link or each link of a 3rd link and a 4th link is respectively connected by two connection shafts at one end and the other end. Including a pair of link members, the intermediate part of the pair of link members of the first link or the third link and the intermediate part of the pair of link members of the second link or the fourth link can be rotated by a common rotation axis And a connecting shaft that connects one end of the pair of link members of the first link or the third link and a connecting shaft that connects one end of the pair of link members of the second link or the fourth link are the floor surface, or A member that is rotatably supported by a member that is fixed to the floor and a step or a member that is fixed to the step and connects the other ends of the pair of link members of the first link or the third link. The connecting shaft that connects the shaft and the other end of the pair of link members of the second link or the fourth link slides on the step or the member fixed to the step and the floor or the member fixed to the floor. Each of the connecting members is movably supported, and the connecting member is between a connecting shaft that connects the other ends of the pair of link members of the first link and a connecting shaft that connects the other ends of the pair of link members of the third link, or The connecting shaft that connects the other ends of the pair of link members of the second link and the connecting shaft that connects the other ends of the pair of link members of the fourth link are connected.

  In this specific aspect, each link of the first link and the second link, or each link of the third link and the fourth link has three or more link members as long as it includes at least a pair of link members. It may be the composition which includes.

According to a specific aspect of the present invention, the platform support mechanism is arranged in a posture in which the platform is parallel to the floor surface or a member fixed to the floor surface in addition to the first link mechanism and the second link mechanism. Including a third link mechanism having two links pivotally connected to each other about a third axis parallel to the first axis for raising and lowering, the four links of the two links of the third link mechanism Two ends of the ends are respectively supported by the floor surface or a member fixed to the floor surface and a step or the member fixed to the step so as to be rotatable as a rotation end, and the third link mechanism The remaining two of the four ends of the two links can slide as sliding ends on the floor surface or a member fixed to the floor surface and a step or a member fixed to the step. respectively supported on the third link mechanism includes a first axis In the row direction, are arranged in a state of being parallel to the first link mechanism, the second link mechanism, in a direction perpendicular to the first axis, are arranged in a state where the first link mechanism and the series of the first link mechanism A direction from one rotation end to a specific first sliding end, a direction from one rotation end of the second link mechanism to a specific second sliding end, and one rotation end of the third link mechanism In the arrangement relationship of the first to third link mechanisms in which the direction from the first to the specific third sliding end is all the same direction, the connecting member is in the range from the first axis to the specific first sliding end. A first connecting portion located; a second connecting portion located in a range from the second axis to the specific second sliding end; and a third located in a range from the third axis to the specific third sliding end. Connect between the connecting parts.

  In this specific aspect, as long as the step support mechanism includes at least the first to third link mechanisms, the step support mechanism may include four or more link mechanisms.

  In this specific aspect, the third connecting portion may be a shaft portion on the third axis, but is preferably a specific third sliding end.

In this specific aspect , the connecting member is biased by an elastic force so that the sliding ends of the link mechanisms of the first link mechanism and the second link mechanism slide toward the rotating ends of the link mechanisms. The structure provided with the biasing member to perform may be sufficient .

  In this specific aspect, the one end of the urging member may be directly attached to the connecting member, or may be attached to the member connected to the connecting member.

In this specific aspect , the opening operation mechanism includes an operation member connected to a step or a member fixed to the step, an operation rail fixed to the door and extending in an inclined state of the door opening and closing, is connected to one end, a pressing member which presses the actuating rails to exert a force to open the door to the working rail, it may be configured to include a.

  In this specific aspect, the actuating member of the opening actuating mechanism may be configured to be rotatably supported by the step platform, or may be configured to be fixed to the step platform. Further, in this specific aspect, the pressing member of the opening operation mechanism may be configured to push down the operating rail when the force for opening the door is applied to the operating rail, or to be configured to push up the operating rail. Also good.

(Third invention mode)
According to a third aspect of the present invention , the door support mechanism that supports the door that opens and closes the door in an openable and closable manner, the stepped plate that is disposed in the vicinity of the doorway, and the floor surface or the floor surface is fixed. A step support mechanism that supports the step so that it can be moved up and down with respect to a member, an opening operation mechanism that applies a stepping force that acts on the step to the door as a force that opens the door, and a connecting member. A first link mechanism having two links that are connected to each other around the first axis so that the intermediate part can be rotated around the first axis, and an intermediate part that is connected to each other around the second axis parallel to the first axis. A second link mechanism having two links, wherein two of the four ends of the two links of each link mechanism have a floor surface, or a member fixed to the floor surface, and a platform, Or a rotating end The remaining two of the four ends of the two links of each link mechanism are fixed to the floor surface or a member that is fixed to the floor surface and the step or the step platform. The direction of the first link mechanism from one rotation end to the specific first slide end is one rotation of the second link mechanism. In the arrangement relationship of the two link mechanisms in the same direction as the direction from the end toward the specific second sliding end, the connecting member is a first connecting portion located in a range from the first axis to the specific first sliding end. And the second connecting portion located in the range from the second axis to the specific second sliding end, and the opening operating mechanism is an operating member connected to a step or a member fixed to the step And an operation that is fixed to the door and extends while tilting in the door opening / closing direction. And Lumpur, connected to one end of the actuating member, anda pressing member for pressing the working rail to exert a force to open the door to the working rail, an intermediate portion of the actuating member opening operation mechanism, springboard, Or it is rotatably supported by the member fixed to a footrest, and the other end of an action | operation member is the structure contact | abutted to the floor surface or the member fixed to a floor surface.

(Fourth Invention Mode)
According to a fourth aspect of the present invention, a door support mechanism that supports the door that opens and closes the door in an openable and closable manner, and a first region and a second region that are respectively located on both sides of the doorway in the direction passing through the doorway An extended step, a step support mechanism that supports the step so that it can be raised and lowered with respect to the floor surface or a member fixed to the floor, and a stepping force that acts on the step is used as a force to open the door. An opening actuating mechanism to be actuated, and a connecting member. The step support mechanism includes a first link mechanism and a second link mechanism arranged in each of the first region and the second region, and the first link mechanism. Has two links whose intermediate portions are pivotally connected to each other around the first axis in order to raise and lower the platform in a parallel posture with respect to the floor surface or a member fixed to the floor surface , Second link mechanism , Floor, or an intermediate portion to relative member fixed to the floor to lift and lower the platform in a parallel posture are two which are pivotally connected to each other about a first axis parallel to the second axis Two of the four ends of the two links of each link mechanism are connected to a floor surface or a member fixed to the floor surface and a step or a member fixed to the step. The other two ends of the four ends of the two links of each link mechanism are rotatably supported as a moving end, and the floor surface or a member fixed to the floor surface and the step or the step The fixed member is slidably supported as a sliding end, and the direction from one rotation end of the first link mechanism toward the specific first sliding end is one rotation of the second link mechanism. Both of the relays are in the same direction as the direction from the moving end toward the specific second sliding end. In the arrangement relationship of the hook mechanism, the connecting member is positioned in the range from the first axis to the specific first sliding end and in the range from the second axis to the specific second sliding end. The first link mechanism and the second link mechanism are configured to be spaced apart from each other in a direction orthogonal to the first axis .

(Fifth aspect of the invention)
  According to a ninth aspect of the present invention, there is provided a door support mechanism that supports the door that opens and closes the door in an openable and closable manner, and a first region and a second region that are respectively located on both sides of the doorway in a direction passing through the doorway. An extended step, a step support mechanism that supports the step so that it can be raised and lowered with respect to the floor surface or a member fixed to the floor, and a stepping force that acts on the step is used as a force to open the door. An opening actuating mechanism to be actuated, and a connecting member, wherein the footrest support mechanism is disposed in the first region, the first link mechanism disposed in the first region, the second link mechanism disposed in the second region, and the first region. A third link mechanism, wherein the first link mechanism is configured such that the intermediate portion is mutually rotated around the first axis in order to raise and lower the stepping platform in a parallel posture with respect to the floor surface or a member fixed to the floor surface. Pivotable The second link mechanism has two links that are connected to each other, and the second link mechanism has a middle portion parallel to the first axis in order to raise and lower the platform in a parallel posture with respect to the floor surface or a member fixed to the floor surface. There are two links that are pivotally connected to each other about two axes, and the third link mechanism is for raising and lowering the platform in a parallel posture with respect to the floor surface or a member fixed to the floor surface. The middle portion has two links that are pivotally connected to each other about a third axis parallel to the first axis, and two of the four ends of the two links of each link mechanism are floor Of the four ends of the two links of each link mechanism. The member fixed to the surface or the floor and the step or the member fixed to the step are rotatably supported as the rotation ends. The other two ends are the floor or a member fixed to the floor. A slidably supported as a sliding end is supported on a step or a member fixed to the step, and the connecting member extends over both the first region and the second region. A direction from one rotation end to a specific first sliding end, a direction from one rotation end of the second link mechanism to a specific second sliding end, and one rotation end of the third link mechanism In the arrangement relationship of the first to third link mechanisms in which the direction from the first to the specific third sliding end is all the same direction, the connecting member is in the range from the first axis to the specific first sliding end. A first connecting portion located; a second connecting portion located in a range from the second axis to the specific second sliding end; and a third located in a range from the third axis to the specific third sliding end. The first link mechanism and the second link mechanism are connected to the connection portion with the first axis. It is the structure arrange | positioned at intervals in the orthogonal direction.

  Each component of the second to fifth aspects of the invention is realized in various forms, similar to the first aspect of the invention and the specific aspect.

(Effects of the first aspect of the invention and its specific aspects)
In the first aspect of the present invention, the step support mechanism includes a first link mechanism having two links in which the intermediate portion is pivotally connected to each other around the first axis, and the intermediate portion is the first link. And a second link mechanism having two links rotatably connected to each other about a second axis parallel to the one axis. Two of the four ends of the two links of each link mechanism rotate as a rotation end to the floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Each is supported as possible. The remaining two ends are each slidably supported as a sliding end by a floor surface or a member fixed to the floor surface and a step or a member fixed to the step. The direction from one rotating end portion of the first link mechanism toward the specific first sliding end is the same as the direction from one rotating end of the second link mechanism toward the specific second sliding end. In the arrangement relationship between the two link mechanisms, the connecting member has a first connecting portion located in a range from the first axis to the specific first sliding end, and a range from the second axis to the specific second sliding end. It is the structure which connects between the 2nd connection parts located. As a result, even when a person passing through the doorway steps on a position close to the edge of the stepping surface of the stepping platform, the stepping surface can be prevented from being inclined and the stepping platform can be raised and lowered smoothly. Moreover, since the 1st connection part of a 1st link mechanism and the 2nd connection part of a 2nd link mechanism move in conjunction with a connection member, a step platform can be raised / lowered further smoothly. Furthermore, by the pivotable support, at least one link of each link mechanism can be reliably supported by the floor surface or the member fixed to the floor surface and the step or the member fixed to the step. .

  According to a specific aspect of the present invention, the connecting member connects between the specific first sliding end as the first connecting portion and the specific second sliding end as the second connecting portion. As a result, the step platform can be moved up and down very smoothly by interlocking the specific first sliding end and the specific second sliding end, which have a large displacement with respect to the rotation end.

(Effects of the Second Invention Aspect and its Specific Aspect)
In the second aspect of the invention described in claim 3, one end of the first link and one end of the second link located on the same side with respect to the first axis are a floor surface, or a member fixed to the floor surface, It is supported by a step or a member fixed to the step so as to be rotatable as a rotation end. The other end of the first link and the other end of the second link are slidably supported as a slide end on a step or a member fixed to the step and a floor surface or a member fixed to the floor surface, respectively. Is done. The one end of the third link and the one end of the fourth link located on the same side with respect to the second axis are rotated on the floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Each is supported as a moving end so as to be rotatable. The other end of the third link and the other end of the fourth link are slidably supported as a slide end on a step or a member fixed to the step and a floor surface or a member fixed to the floor surface, respectively. Is done. The first link mechanism and the second link mechanism are arranged so that the direction from one end of the first and second links toward the other end is the same as the direction from one end to the other end of the third and fourth links. The The connecting member is between the first connecting part located in the range from the first axis to the other end of the first link and the second connecting part located in the range from the second axis to the other end of the third link, or The first connection part located in the range from the first axis to the other end of the second link is connected to the second connection part located in the range from the second axis to the other end of the fourth link. As a result, compared to a configuration in which both ends of each link of the first link and the third link are rotatably supported, the amount of movement by which the step moves in the direction in which the stepping surface expands when the step goes up and down is reduced. This makes it easy to step on the platform.

  According to a specific aspect of the present invention, the connecting member is fixed to the floor surface or the other surface of the second link that is slidably supported by the floor surface or the member fixed to the floor surface. The other end of the fourth link is slidably supported by the member to be connected. As a result, the other end of the second link and the other end of the fourth link are stably supported by the floor surface or a member fixed to the floor surface. The moving operation can be reliably transmitted to the other end.

In this specific aspect , the first distance between one end of the first link or the third link supported by the floor surface or a member fixed to the floor surface and the first axis or the second axis of the intermediate portion is , the other end of the second link or fourth link being supported by a member fixed to the floor or floor surface, the same as the second distance between the first axis or the second axis of the intermediate section Also good . The third distance between the other end of the first link or the third link supported by the step or the member fixed to the step and the first axis or the second axis of the intermediate portion is fixed to the step or the step one end of the second link or fourth link being supported by a member which is may be the same as the fourth distance between the first axis or the second axis of the intermediate section. As a result, the stepping surface of the platform is held so as to be parallel to the floor surface or a member fixed to the floor surface. For this reason, even when a person passing through the doorway steps on a position close to the edge of the stepping surface of the stepping platform, the stepping surface can be reduced from being inclined with respect to the floor surface, and the stepping platform can be raised and lowered smoothly. it can.

In this specific aspect , all of the first distance to the fourth distance may be the same. As a result, the stepping surface of the platform can be held parallel to the floor surface or a member fixed to the floor surface, and can be moved up and down in a vertical direction. For this reason, even when a person who passes through the doorway steps on a position close to the edge of the stepping surface of the stepping platform, the stepping surface can be prevented from being inclined with respect to the floor surface, and the stepping platform can be raised and lowered more smoothly. Can do.

In the specific aspect of Claim 5 , the intermediate part of a pair of link member of a 1st link or a 3rd link, and the intermediate part of a pair of link member of a 2nd link or a 4th link are common rotating shafts. It is connected so that rotation is possible. The connecting shaft that connects one end of the pair of link members of the first link or the third link and the connecting shaft that connects one end of the pair of link members of the second link or the fourth link are fixed to the floor surface or the floor surface. And a member fixed to the step or a step or a step. The connecting shaft that connects the other ends of the pair of link members of the first link or the third link and the connecting shaft that connects the other ends of the pair of link members of the second link or the fourth link are fixed to the step or the step. And a member to be slidably supported on the floor surface or a member fixed to the floor surface. The connecting member is between a connecting shaft that connects the other ends of the pair of link members of the first link and a connecting shaft that connects the other ends of the pair of link members of the third link, or a pair of second links. The connecting shaft that connects the other ends of the link members and the connecting shaft that connects the other ends of the pair of link members of the fourth link are connected. Usually, the amount of displacement of the link mechanism due to the external force acting in the direction in which the axis of the connecting shaft that rotatably connects the two links extends is greater than the amount of displacement of the link mechanism due to the external force acting in the direction perpendicular to the axis. growing. For this reason, in this specific aspect, since the step platform is supported by the pair of link members, the amount of displacement of the link mechanism due to the external force acting in the direction in which the axis of the common rotation shaft extends can be reduced. The step platform can be raised and lowered smoothly.

In a specific aspect of the present invention, the step support mechanism includes a third link mechanism in addition to the first link mechanism and the second link mechanism. Two of the four ends of the two links of the third link mechanism rotate as a rotation end to a floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Each is supported movably. The remaining two ends of the four ends of the two links of the third link mechanism are sliding ends on the floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Are slidably supported. The third link mechanism is arranged in parallel with the first link mechanism in a direction parallel to the first axis, and the second link mechanism is in series with the first link mechanism in a direction orthogonal to the first axis. It is arranged with. A direction from one rotation end of the first link mechanism toward a specific first sliding end, a direction from one rotation end of the second link mechanism toward a specific second sliding end, and a third link mechanism In the arrangement relationship of the first to third link mechanisms in which the direction from the one rotation end portion to the specific third sliding end is all the same direction, the connecting member has a specific first from the first axis. From the first connecting part located in the range to the sliding end, the second connecting part located in the range from the second axis to the specific second sliding end, and from the third axis to the specific third sliding end It connects between the 3rd connection parts located in the range. As a result, the second and third link mechanisms are arranged in a state parallel to the first link mechanism in a direction parallel to the first axis and in a state in series in a direction orthogonal to the first axis. , Can stably support the platform. Moreover, since the 1st thru | or 3rd connection part of a 1st thru | or 3rd link mechanism moves in conjunction with a connection member, a step platform can be raised / lowered still more smoothly.

In this specific aspect , the urging member includes the connecting member such that the sliding end of each link mechanism of the first link mechanism and the second link mechanism slides toward the rotating end of each link mechanism. It may be biased by an elastic force. As a result, when the stepping on the stepping platform is released, the connecting member receives the elastic force of the biasing member and reliably interlocks the sliding operation of the sliding ends of the first link mechanism and the second link mechanism. And the platform can be raised smoothly.

In this specific aspect , the opening operation mechanism includes an operation member connected to a step or a member fixed to the step, an operation rail fixed to the door and extending in an inclined state of the door opening and closing, is connected to one end, a pressing member which presses the actuating rails to exert a force to open the door to the working rail, it may be configured to include a. As a result, when the step is released and the step is raised, the rising force of the step is transmitted to the pressing member via the operation member, and acts on the operation rail as a force for closing the door. For this reason, a door can be closed smoothly.

(Effect of the third aspect of the invention)
According to a third aspect of the present invention , the intermediate portion of the operating member of the opening operating mechanism is rotatably supported by a step or a member fixed to the step, and the other end of the operating member is a floor surface. Or a member fixed to the floor surface. As a result, when the step is stepped on, the operating member rotates about the floor surface or the other end abutting against the member fixed to the floor surface. The door can be opened smoothly.

(Effect of the fourth aspect of the invention)
In the fourth aspect of the present invention, the step platform is arranged to extend to the first region and the second region respectively located on both sides of the entrance in the direction passing through the entrance. The platform support mechanism includes a first link mechanism and a second link mechanism that are arranged in each of the first region and the second region. Two of the four ends of the two links of each link mechanism rotate as a rotation end to the floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Each is supported as possible. The remaining two ends are each slidably supported as a sliding end by a floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Both directions in which the direction from one rotation end of the first link mechanism toward the specific first sliding end is the same as the direction from one rotation end of the second link mechanism toward the specific second sliding end In the arrangement relationship of the link mechanism, the connecting member is positioned in the range from the first axis to the specific first sliding end and in the range from the second axis to the specific second sliding end. The second connecting part is connected. As a result, even when a person passing through the doorway steps in a position near the edge of the stepping surface of the stepping platform, it is possible to reduce the tilting of the stepping surface of the wide stepping platform extending into the first region and the second region. Can be raised and lowered smoothly. Moreover, since the 1st connection part of a 1st link mechanism and the 2nd connection part of a 2nd link mechanism move in conjunction with a connection member, a step platform can be raised / lowered further smoothly. Furthermore, by the pivotable support, at least one link of each link mechanism can be reliably supported by the floor surface or the member fixed to the floor surface and the step or the member fixed to the step. .

(Effect of 5th invention aspect)
In a fifth aspect of the invention according to claim 9 , the connecting member is disposed so as to extend over both the first region and the second region, and the connecting member extends from the first axis to the specific first sliding end. A first connecting portion located in a range, a second connecting portion located in a range from the second axis to the specific second sliding end, and a range from the third axis to the specific third sliding end The first link mechanism and the second link mechanism are connected to the third connection portion, and are disposed with a space in a direction orthogonal to the first axis. As a result, the connecting member can accurately link the three link mechanisms in both regions, can further reduce the inclination of the stepping surface of the wide step extending in both regions, and can raise and lower the step more smoothly. be able to.

1 is a perspective view showing an overall configuration of a single-sided sliding door opening and closing device 1 according to a first embodiment of the present invention. FIG. 3 is a perspective view showing an overall configuration of a step support mechanism 3. It is a perspective view which shows the step stand support mechanism 3 in the state which removed the skirt parts 53F1-53B3 and the decorative boards 49-52. It is a perspective view which shows the step support mechanism 3 in the state which removed the fixing plate 47 from the state shown in FIG. It is a perspective view which shows the step support mechanism 3 in the state which removed the frame assembly 46 from the state shown in FIG. 3 is an enlarged perspective view showing a link mechanism 41. FIG. It is a perspective view which expands and shows the interlocking mechanism 91 of the opening / closing operation mechanism 4. FIG. It is a perspective view which shows the sliding door 27 closed in the state which removed the lower cover 32. FIG. It is a perspective view which shows the sliding door 27 open | released in the state which removed the lower cover. FIG. 5 is a left side cross-sectional view showing the inside of the step support mechanism 3 shown in FIG. 2, which is cut at a position corresponding to the line AA shown in FIG. . FIG. 5 is a left side cross-sectional view showing the inside of the footrest support mechanism 3 shown in FIG. 2, which is cut at a position corresponding to the line BB shown in FIG. . FIG. 5 is a left side cross-sectional view showing the inside of the footrest support mechanism 3 shown in FIG. 2, which is cut at the position corresponding to the line AA shown in FIG. FIG. 5 is a left cross-sectional view showing the inside of the footrest support mechanism 3 shown in FIG. 2, which is cut at the position corresponding to the line BB shown in FIG. It is a perspective view which shows the whole structure of the sliding door opening / closing apparatus 400 of double-sided opening which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the whole structure of the step support mechanism 403. It is a perspective view which shows the step stand support mechanism 403 in the state which removed the skirt parts 453F1-453B3 and the decorative board 450,451. FIG. 17 is a perspective view showing the step support mechanism 403 with the fixing plates 447 to 449 removed from the state shown in FIG. 16. FIG. 18 is a perspective view showing the step support mechanism 403 with the frame assemblies 446F and 446B removed from the state shown in FIG. In the modification of this invention, it is a perspective view which shows the footrest support mechanism 3 in the state shown in FIG.

<First Embodiment>
[Overall configuration of sliding door opening and closing device 1]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. The present embodiment is a single-sided sliding door opening and closing device 1 installed at an entrance of a store or the like. FIG. 1 shows the overall configuration of the sliding door opening and closing device 1. The three directions indicated by the arrows in FIG. 1 are defined as the up-down direction, the left-right direction, and the front-rear direction, and the directions thus determined are indicated by arrows in the drawings subsequent to FIG.

  In FIG. 1, the sliding door opening / closing device 1 mainly includes a door support mechanism 2, a footrest support mechanism 3, an opening / closing operation mechanism 4, a connecting body 5, and an urging mechanism 6.

(Configuration of door support mechanism 2)
The door support mechanism 2 includes a base 20, a pair of left and right columns 21 and 22, and an upper beam 23. The base 20 is fixed to the floor surface. Both struts 21 and 22 are fixed to the base 20 and are erected vertically from the base 20. The upper beam 23 is installed horizontally between the upper ends of both the columns 21 and 22. Wall plates 24 shown in FIG. 8 are fixed to the base 20 and the upper beam 23, respectively, and extend vertically from the base 20. The wall plate 24 is arranged so as to extend from the center position between the two columns 21 and 22 to the right column 21 in the left-right direction. In FIG. 1, a space between the left column 22 and the left end of the wall plate 24 is defined as an entrance / exit 25. The base 20 has a front base region 20F that extends in front of the entrance 25 and a rear base region 20B that extends behind the entrance 25.

  A support rail 26 is fixed to the upper beam 23 and extends horizontally. One slide door 27 is provided to open and close the doorway 25. A pair of support fittings 28 and 29 are fixed to the upper end of the slide door 27. A pair of upper rollers 30 and 31 are rotatably attached to both support brackets 28 and 29. Both upper rollers 30 and 31 engage with the support rail 26 and roll on the support rail 26. The slide door 27 can be moved in the left-right direction along the support rail 26 by the upper rollers 30, 31. In the present embodiment, the opening / closing direction of the slide door 27 is the left-right direction. As shown in FIG. 1, the lower cover 32 is attached to the front lower end portion of the slide door 27 by fixing means such as screws. FIG. 8 shows the sliding door 27 with the lower cover 32 removed.

(Configuration of the platform support mechanism 3)
The configuration of the step support mechanism 3 will be described with reference to FIGS. As shown in FIG. 1, the platform support mechanism 3 is disposed across the front base region 20F of the entrance 25 and the rear base region 20B. The platform support mechanism 3 mainly includes a support substrate 40, four link mechanisms 41 to 44, and a platform 45.

  The support substrate 40 is fixed to the base 20 by fixing means such as screws. The support substrate 40 is fixed to the base 20, and the front support region 40F disposed in the front base region 20F, the rear support region 40B disposed in the rear base region 20B, and the space between both support regions 40F and 40B. And an intermediate support area 40M. As shown in FIG. 4, the four link mechanisms 41 to 44 are attached to the support substrate 40 by fixing means such as screws. The link mechanism 41 is disposed in the left region of the front support region 40F, the link mechanism 42 is disposed in the left region of the rear base region 20B, the link mechanism 43 is disposed in the right region of the front support region 40F, and the link mechanism 44 is rearward. It arrange | positions in the right area | region of the support area | region 40B.

  Each of the four link mechanisms 41 to 44 includes a plurality of links rotatable around a predetermined axis. In each of the link mechanisms 41 to 44, the rotation axes of these links are arranged so as to extend in the left-right direction shown in FIG. The detailed configuration of each link mechanism will be described later.

(Configuration of the step 45)
The detailed configuration of the step platform 45 will be described with reference to FIGS. The step platform 45 includes a frame assembly 46, one fixing plate 47, four decorative plates 49 to 52, and six skirt portions 53F1 to 53F3 and 53B1 to 53B3.

  In FIG. 4, the frame assembly 46 is framed so as to surround the arrangement areas of the four link mechanisms 41 to 44. Specifically, the arrangement area of the link mechanism 41 is surrounded by a part of the connecting member 46A1 extending in the left-right direction, the connecting member 46A2, a part of the connecting member 46B1 extending in the front-rear direction, and the connecting member 46B2. The arrangement area of the link mechanism 42 is surrounded by a part of the pair of connecting members 46C1 extending in the left-right direction, the connecting member 46C2, a part of the connecting member 46B1 extending in the front-rear direction, and the connecting member 46B3. The arrangement region of the link mechanism 43 is surrounded by a part of the connecting member 46A1 extending in the left-right direction, the connecting member 46A3, a part of the connecting member 46D1 extending in the front-rear direction, and the connecting member 46D2. The arrangement area of the link mechanism 44 is surrounded by a part of the connecting member 46C1 extending in the left-right direction, the connecting member 46C3, a part of the connecting member 46D1 extending in the front-rear direction, and the connecting member 46D3. The connecting member 46A1 is fixed to the four connecting members 46B1, 46B2, 46D1, and 46D2, and the connecting member 46C1 is fixed to the four connecting members 46B1, 46B3, 46D1, and 46D3, respectively. The connecting member 46A2 is fixed to the two connecting members 46B1 and 46B2, and the connecting member 46C2 is fixed to the two connecting members 46B1 and 46B3, respectively. The connecting member 46A3 is fixed to the two connecting members 46D1 and 46D2, respectively, and the connecting member 46C3 is fixed to the two connecting members 46D1 and 46D3, respectively. The connecting member 46E is fixed to the two connecting members 46A2 and 46C2. A part of the connecting member 46D1 and the two connecting members 46A3 and 46C3 form a space in which the part of the opening / closing operation mechanism 4 is arranged in the intermediate support region 40M of the support substrate 40.

  In FIG. 3, one fixing plate 47 is fixed to the frame assembly 46 by a fixing means such as a screw or a welding process in a state of covering the entire arrangement region of the frame assembly 46. The fixing plate 47 includes an extending portion 47A extending rightward above the intermediate support region 40M of the support substrate 40. The adjustment opening 47B is formed in the fixed plate 47 at a position close to the connecting member 46A1.

  2 and 3, four decorative plates 49 to 51 are respectively attached to the fixing plate 47 by fixing means such as screws. Specifically, the decorative plate 49 is attached to the fixed plate 47 so as to cover the front portion of the fixed plate 47 from above. The decorative plate 50 is attached to the fixed plate 47 so as to cover the rear portion of the fixed plate 47 from above. The decorative plates 51 and 52 are attached to the fixing plate 47 so as to cover the central portion of the fixing plate 47 including the extending portion 47A from above.

  2 and 4, six skirt portions 53F1 to 53F3 and 53B1 to 53B3 are swingably attached around the frame assembly 46 by hinges and extend obliquely downward. Specifically, the skirt portion 53F1 is attached to the right end portion of the connecting member 46D2 with a hinge, the skirt portion 53F2 is attached to the front end portion of the connecting member 46A1 with a hinge, and the skirt portion 53F3 is attached to the left end portion of the connecting member 46B2. It is attached. The skirt portion 53B1 is attached to the right end portion of the connecting member 46D3 with a hinge, the skirt portion 53B2 is attached to the rear end portion of the connecting member 46C1 with a hinge, and the skirt portion 53B3 is attached to the left end portion of the connecting member B3. As shown in FIG. 10, the skirt portion 53F2 is attached to the front end portion of the connecting member 46A1 with a hinge 54, and the skirt portion 53B2 is attached to the rear end portion of the connecting member 46C1 with a hinge 55.

  The left portion 51A of the decorative plate 51 extends horizontally to the left from the left end portions of the decorative plates 49, 50, and the right portion 52A of the decorative plate 52 extends horizontally to the right from the right end portions of the decorative plates 49, 50. Extend.

(Configuration of link mechanisms 41 to 44)
Since the link mechanisms 41 to 44 are substantially the same in shape, size, and structure, the link mechanism 41 will be described as an example. FIG. 6 is a perspective view of the link mechanism 41 shown in FIG. The link mechanism 41 mainly includes a pair of links 60 and 61 and a pair of links 62 and 63. The four links 60 to 63 are rotatably connected by bearings 65A and 65B attached to both ends of the common shaft 64.

  The front ends of both links 60, 61 are fixed to the connecting shaft 66, and the rear ends of both links 60, 61 are fixed to the connecting shaft 67. The front ends of the links 62 and 63 are fixed to the connecting shaft 68, and the rear ends of the links 62 and 63 are fixed to the connecting shaft 69. Bearings 70A and 70B are attached to both ends of the connecting shaft 66, and fit into the circular holes 72A and 72B of the upper mounting blocks 71A and 71B. Bearings are attached to both ends of the connecting shaft 67 and fit into the long holes of the lower attachment blocks 74A and 74B. In FIG. 6, only the bearing 73A and the long hole 75A are shown. Bearings are attached to both ends of the connecting shaft 68 and fit into the circular holes of the lower mounting blocks 77A and 77B. Bearings 79A and 79B are attached to both ends of the connecting shaft 69, and fit into the long holes 81A and 81B of the upper mounting blocks 80A and 80B.

  The lower mounting blocks 74A, 74B, 77A, 77B are fixed to the upper surface of the support substrate 40 by fixing means such as screws. The upper mounting blocks 71A, 71B, 80A, 80B are fixed to the lower surface of the fixing plate 47 by fixing means such as screws. In the present embodiment, in order to raise and lower the upper surfaces of the decorative plates 49 to 52 in a posture parallel to the support substrate 40 in the vertical direction, between the common shaft 64 and each of the connecting shafts 66 to 69. The arrangement positions of the connecting shafts 66 to 69 are determined so that the distances are the same.

  In a state where the link mechanism 41 is disposed at the position shown in FIG. 5, the common shaft 64 and the connecting shafts 66 to 69 are parallel to the horizontal direction, that is, parallel to the opening / closing direction of the slide door 27. It arrange | positions so that it may become an axis line. In the link mechanism 41 shown in FIG. 5, the lengths of the links 60 to 63 and the common shaft 64 and the connecting shafts 66 to 69 are set so that the length in the front-rear direction is longer than the length in the left-right direction. .

  Similarly to the link mechanism 41, the link mechanisms of the link mechanisms 42 to 44 correspond to four lower mounting blocks corresponding to the lower mounting blocks 74A, 74B, 77A, and 77B and upper mounting blocks 71A, 71B, 80A, and 80B. And four upper mounting blocks. The four lower mounting blocks of each link mechanism are fixed to the upper surface of the support substrate 40 by fixing means such as screws, and the four upper mounting blocks of each link mechanism are fixed to the lower surface of the fixing plate 47 by fixing means such as screws. Is done. In the present embodiment, in each link mechanism, the attachment block having a circular hole such as the circular hole 72A is disposed on the front side of the support substrate 40 from the attachment block having the long holes such as the long holes 75A and 81A.

  In the state where the link mechanisms 42 to 44 are arranged at the positions shown in FIG. 5, the axis of each axis of each link mechanism corresponding to the common shaft 64 and the connecting shafts 66 to 69 of the link mechanism 41 is the same as that of the link mechanism 41. These are arranged so as to have an axis parallel to the left-right direction. Each link mechanism of the link mechanisms 42 to 44 has a link length corresponding to the links 60 to 63, the common shaft 64 and the connecting shafts 66 to 69 so that the length in the front-rear direction is longer than the length in the left-right direction. The length of each corresponding axis is set.

  When the component parts of the link mechanism 42 correspond to the component parts of the link mechanism 41 shown in FIG. 6, the numeral “1” is added before the reference number of the component parts of the link mechanism 41. For example, in FIG. 5, the links of the link mechanism 42 corresponding to the links 60, 61, 62, and 63 of the link mechanism 41 are denoted by reference numerals 160, 161, 162, and 163, respectively. When the component parts of the link mechanism 43 correspond to the component parts of the link mechanism 41 shown in FIG. 6, the numeral “2” is added before the reference number of the component parts of the link mechanism 41. For example, in FIG. 5, the links of the link mechanism 43 corresponding to the links 60, 61, 62, and 63 of the link mechanism 41 are denoted by reference numerals 260, 261, 262, and 263, respectively. When the component parts of the link mechanism 44 correspond to the component parts of the link mechanism 41 shown in FIG. 6, the numeral “3” is added before the reference number of the component parts of the link mechanism 41. For example, in FIG. 5, links 360, 361, 362, and 363 are attached to the links of the link mechanism 44 corresponding to the links 60, 61, 62, and 63 of the link mechanism 41.

(Configuration of the opening / closing operation mechanism 4)
The configuration of the opening / closing operation mechanism 4 will be described with reference to FIGS. 5, 7, and 8. The opening / closing operation mechanism 4 mainly includes an operation rail 90, an interlocking mechanism 91, and a pressing roll 92. As shown in FIG. 8, the operation rail 90 is fixed to the lower end portion of the slide door 27 and extends in the left-right direction in a state of being inclined to the right. The operation rail 90 has a groove 90 </ b> A that opens forward so that the pressing roll 92 fits. The press roll 92 can press the upper edge or the lower edge extending in the left-right direction of the groove 90A in a state of being fitted in the groove 90A.

  The interlocking mechanism 91 is a mechanism that interlocks the raising / lowering operation of the step platform 44 and the opening / closing operation of the slide door 27, and mainly includes an interlocking lever 94 and a roll support 95 as shown in FIG. 7. The connecting shaft 96 is attached to the central portion of the interlocking lever 94 and supported by a pair of attachment blocks 97A and 97B via bearings. Both the attachment blocks 97A and 97B are attached to the lower surface of the extending portion 47A of the fixing plate 47 by fixing means such as screws. A roll support 95 is fixed to the right bent end of the interlocking lever 94 by fixing means such as a screw, and extends upward from the interlocking lever 94. The pressing roll 92 is rotatably attached to the vicinity of the upper end portion of the roll support 95. A pair of rollers 98A and 98B are rotatably attached to the left end portion of the interlocking lever 94. The regulating member 99 is a member that regulates the amount of upward movement of both rollers 98A and 98B, is arranged so as to cover both rollers 98A and 98B from above, and is attached to the upper surface of the support substrate 40 by fixing means such as screws. It is done.

(Configuration of connector 5)
The connection body 5 is demonstrated with reference to FIG. 4 and FIG. As shown in FIG. 5, the connection body 5 is formed in a plate shape that extends long in the front-rear direction. The connecting body 5 is disposed in a space defined by the connecting members 46A1, 46B1, 46C1, and 46D1 shown in FIG. The connecting body 5 mainly includes a front connecting plate portion 110, a rear connecting plate portion 111, and a long connecting plate portion 112. The longitudinal connecting plate portion 112 is fixed to the connecting plate portions 110 and 111 by fixing means such as screws on the upper surfaces of the connecting plate portions 110 and 111. The longitudinal connecting plate portion 112 has a pair of notches 112A and 112B at both front and rear ends.

  The front connecting plate part 110 includes a left standing part 110A and a right standing part 110B. 110 A of left standing parts are extended from the left end of the longitudinal connection board part 112 to the left, and stand upwards. The right standing part 110B extends rightward from the right end of the longitudinal connecting plate part 112 and stands upward. The left standing part 110A is rotatably connected to the connecting shaft 67 of the link mechanism 41, and the right standing part 110B is rotatably connected to the connecting shaft 267 of the link mechanism 43.

  The rear connecting plate part 111 includes a left standing part 111A and a right standing part 111B. The left standing portion 111A extends leftward from the left end of the longitudinal connecting plate portion 112 and stands upward. The right standing part 111B extends rightward from the right end of the longitudinal connecting plate part 112 and stands upward. The left standing portion 111A is rotatably connected to the connecting shaft 167 of the link mechanism 42, and the right standing portion 111B is rotatably connected to the connecting shaft 367 of the link mechanism 44.

(Configuration of biasing mechanism 6)
The urging mechanism 6 will be described with reference to FIGS. 4 and 5. The urging mechanism 6 mainly includes a pair of supports 120 and 121, an adjustment spring hanging body 122, and a spring hanging body 123. The urging mechanism 6 is disposed in a space defined by the connecting members 46A1, 46B1, 46C1, and 46D1 shown in FIG. The pair of support tools 120 and 121 are respectively fixed to the front support region 40F of the support substrate 40 by fixing means such as screws. The adjustment spring hanging body 122 includes a pair of long grooves 124 and 125 extending in the front-rear direction and a pair of spring hanging pieces 126 and 127. The adjustment spring hook 122 is attached to both supports 120 and 121 so as to be movable in the front-rear direction by adjusting screws 128 and 129 inserted into the long grooves 124 and 125, respectively.

  The spring hook 123 is fixed to a region of the front connecting plate 110 defined by the notch 112A of the long connecting plate 112 by a fixing means such as a screw. The spring hanging body 123 includes a pair of spring hanging pieces 130 and 131. A pair of coil springs 132 and 133 are stretched between the two spring hanging pieces 126 and 127 and the two spring hanging pieces 130 and 131, respectively. The two coil springs 132 and 133 always urge the connection body 5 forward, that is, the connection shafts 67, 167, 267, and 367 of the link mechanisms 41 to 44 toward the connection shafts 68, 168, 268, and 368. .

  The adjustment screws 128 and 129 are exposed through the adjustment opening 47B in a state where the decorative plate 49 is removed as shown in FIG. The operator can adjust the position of the adjustment spring hook 122 in the front-rear direction through the adjustment opening 47B.

[Operation and Action of Sliding Door Opening / Closing Device 1]
The operation and action of the sliding door opening / closing device 1 will be described with reference to the drawings. A state in which the slide door 27 is closed, an operation to be opened from the closed state, and an operation to be closed from the opened state will be described.

(The slide door 27 is closed)
When the step 45 is not depressed, the coil springs 132 and 133 constantly bias the connecting shafts 67, 167, 267, and 367 of the link mechanisms 41 to 44 toward the connecting shafts 68, 168, 268, and 368. , The platform 45 is raised. Since the connecting shaft 96 is attached to the step platform 45 by both mounting blocks 97A and 97B, the connecting shaft 96 also rises as the step platform 45 rises. As the connecting shaft 96 rises, the interlocking lever 94 rotates in the direction of the arrow D1 shown in FIG. 7 about the contact point between the rollers 98A and 98B and the upper surface of the support substrate 40.

  As the interlocking lever 94 rotates in the direction of the arrow D1, the roll support 95 receives an external force that tends to move upward. The pressing roll 92 receives an external force from the roll support 95 and presses the upper edge of the operating rail 90 forming the groove 90A of the operating rail 90 in FIG. Of the pressing force of the pressing roll 92, a horizontal component force acts on the operating rail 90 as a force for closing the slide door 27. Due to this horizontal component force, the slide door 27 moves to the left and is closed. When the slide door 27 is in a closed state, the step platform 45 is raised and held at a predetermined raised position. FIG. 10 shows a state in which the step platform 45 is stopped at a predetermined raised position. When the slide door 27 is in a closed state, the pressing roll 92 is fitted in the groove 90A at the right end portion of the operating rail 90 as shown in FIG.

(Operation in which the slide door 27 is opened)
When a person passing through the doorway 25 steps on the step 45, the step 45 is lowered while being supported by the four link mechanisms 41-44. FIG. 12 shows a state in which the step platform 45 is stopped at a predetermined lowered position. When the step 45 is lowered, even if a passing person steps on the end of the step 45, the link mechanisms 41 to 44 cooperate with each other to cope with the deformation of each link mechanism caused by the stepping force. Therefore, the upper surface of the step platform 45 can be held in a posture parallel to the support substrate 40 and the base 20.

  12, the lower surfaces of the front end portions of the links 60 and 61 shown in FIG. 6 abut against the connecting shaft 68, and the lower surfaces of the rear end portions of the links 62 and 63 shown in FIG. Abut. By this contact, a predetermined lowering position of the step platform 45 is defined.

  When the step 45 is lowered, the connecting shaft 96 attached to the interlocking lever 94 receives a stepping force from the step 45. With this stepping force, the interlocking lever 94 tries to rotate in the direction opposite to the direction of the arrow D1 shown in FIG. 7 around the contact point between the pair of rollers 98A, 98B and the support substrate 40. As the interlocking lever 94 rotates, the roll support 95 receives an external force that tends to move downward. The pressing roll 92 receives an external force from the roll support 95 and presses the lower edge of the operating rail 90 forming the groove 90A of the operating rail 90 in FIG. Of the pressing force of the pressing roll 92, a horizontal component force acts on the operating rail 90 as a force for opening the slide door 27. With this horizontal component force, the slide door 27 moves to the right and is opened. When the interlocking lever 94 rotates, the interlocking lever 94 enlarges the descending stroke of the step platform 44 and transmits it as the amount of movement of the roll support 95 downward. As a result, a large opening movement amount is given to the slide door 27.

  FIG. 9 shows a state where the slide door 27 is opened. When the slide door 27 is in an opened state, the pressing roll 92 is fitted in the groove 90A at the left end portion of the operating rail 90 as shown in FIG.

  In addition, when a person who passes through the doorway 25 steps on the right edge of the decorative plate 49 of the step board 45 shown in FIG. 8, the stepping force is applied to the link mechanism 43 disposed immediately below the right region of the decorative plate 49. It is added first. In FIG. 11, the links 260 and 261 of the link mechanism 43 are swung by the stepping force, and the connecting shaft 267 of the links 260 and 261 moves along the long hole of the mounting block against the elastic biasing force of the two coil springs 132 and 133. Slide. The sliding of the connecting shaft 267 is transmitted to the connecting shaft 67 of the links 60 and 61 of the link mechanism 41 by the front connecting plate portion 110. Due to the transmission of this sliding, a force that slides along the long holes of the mounting blocks 74 </ b> A and 74 </ b> B is applied to the connecting shaft 67. Further, the sliding of the connecting shaft 267 is performed by the longitudinal connecting plate portion 112 and the rear connecting plate portion 111, the connecting shaft 167 of the links 160 and 161 of the link mechanism 42, and the connecting shaft 367 of the links 360 and 361 of the link mechanism 44. And transmitted to each. Due to the transmission of this sliding, a force for sliding along the long hole of the mounting block is applied to the connecting shafts 167 and 367, respectively. When the connecting shafts 67, 167, 267, 367 slide in conjunction with each other, the step platform 45 can be smoothly lowered. 12 and 13 show a state in which the step platform 45 is stopped at a predetermined lowered position. 12 and 13, the skirt portions such as the skirt portions 53F2 and 53B2 are illustrated in a state of being rotated to a horizontal position.

(Operation in which the slide door 27 is closed)
The elastic urging forces of the coil springs 132 and 133 are applied to the four connecting shafts 67, 167, 267, and 367 of the four link mechanisms 41 to 44 by the front connecting plate portion 110, the rear connecting plate portion 111, and the long connecting plate portion 112. Therefore, when the step 45 is released, the four connecting shafts 67, 167, 267, 367 are slid simultaneously. By the simultaneous sliding of the connecting shafts 67, 167, 267, and 367, the step platform 45 is smoothly raised toward the predetermined rising position shown in FIGS. 10 and 11 while being supported by the four link mechanisms 41 to 44. be able to.

  As the step platform 45 rises, the interlock lever 94 receives an upward external force from the step platform 44 via the connecting shaft 96, and the roll support body 95 receives an upward external force from the interlock lever 94. The pressing roll 92 receives an external force from the roll support 95 and presses the upper edge of the operating rail 90 forming the groove 90A of the operating rail 90 in FIG. Of the pressing force of the pressing roll 92, the horizontal component force acts on the operating rail 90 as a force for closing the slide door 27. Due to this horizontal component force, the slide door 27 moves to the left and is closed. Since the interlocking lever 94 enlarges the amount of movement of the step 45 and transmits it to the roll support 95, the rising stroke of the step 45 is also enlarged and transmitted as the amount of movement upward of the roll support 95. As a result, a large closing movement amount is given to the slide door 27.

[Effect of the first embodiment]
In the present embodiment, the step platform 45 is supported by the four link mechanisms 41 to 44. The links 60 and 61 and the links 62 and 63 of each link mechanism are connected to each other by a common shaft 64 so as to be rotatable at an intermediate portion thereof. As a result, even when a person who passes through the doorway steps on the edge near the skirt portion of the step 45, the link mechanisms 41 to 44 maintain the upper surface of the step 45 in a posture parallel to the base 20 and the support substrate 40. The sliding door 27 can be opened smoothly and reliably by the lowering of the step 45.

  In the present embodiment, the bearings attached to the connection shafts 66 and 68 of the link mechanism 41 are fitted into the circular holes of the attachment blocks 71A, 71B, 77A and 77B, and the bearings attached to the connection shafts 67 and 69 are The mounting blocks 74A, 74B, 80A, 80B are fitted into the long holes. Further, the connecting shafts 66 to 69 are arranged so that the distance between the common shaft 64 and each of the connecting shafts 66 to 69 is substantially the same. The other link mechanisms 42 to 44 are configured similarly to the link mechanism 41. As a result, when the step 45 moves up and down, for example, when the step 45 rises from a predetermined lowered position toward a predetermined raised position, the step 45 is displaced in either the front-rear direction or the left-right direction. Without going up, it can rise straight up and down. Even when the step platform 45 is lowered from the predetermined raised position toward the predetermined lowered position, it can be lowered straight in the vertical direction.

  In this embodiment, the interlocking lever 94 extends from the step platform 45 in the direction in which the slide door 27 opens, that is, rightward in FIG. 9, and the roll support 95 is fixed to the right end of the interlocking lever 94 as shown in FIG. The As a result, the slide door 27 can be opened to a position beyond the arrangement area of the step platform 45 as compared with a configuration in which the roll support 95 is directly fixed to the step platform 45. Further, since the interlocking lever 94 enlarges the lifting stroke of the step platform 44 and transmits it to the roll support 95, a large opening / closing movement amount can be imparted to the slide door 27 even with a small lifting stroke.

  In the present embodiment, the opening / closing operation mechanism 4 excluding the operation rail 90, the four link mechanisms 41 to 44, and the step platform 45 are assembled into the support substrate 40 to be unitized. As a result, the work of installing the footrest support mechanism 3 and the opening / closing operation mechanism 4 on the base 20 can be easily performed.

  In the present embodiment, the footrest support mechanism 3 is disposed across the front base region 20F of the entrance 25 and the rear base region 20B, as shown in FIG. The four link mechanisms 41 to 44 support the platform 45 disposed over both the base regions 20F and 20B. The connecting body 5 connects the four connecting shafts 67, 167, 267, and 367 of the four link mechanisms 41 to 44. The four connecting shafts 67, 167, 267, 367 slide along the long holes of the mounting block fixed to the support substrate 40. As a result, the sliding of the four connecting shafts 67, 167, 267, 367 is regulated by the long holes of the mounting block fixed to the support substrate 40. Compared with a configuration in which four connecting shafts that slide along are connected, the sliding of one connecting shaft can be reliably transmitted to the other connecting shaft.

  In the present embodiment, the two coil springs 132 and 133 always urge the coupling body 5 in order to return the step platform 45 to a predetermined raised position. The urging mechanism 6 including both the coil springs 132 and 133 is assembled to the support substrate 40 together with the four link mechanisms 41 to 44. As a result, the urging mechanism 6 is unitized together with the opening / closing operation mechanism 4 excluding the operation rail 90, the four link mechanisms 41 to 44, and the step platform 45, and the installation work on the base 20 can be performed more easily.

Second Embodiment
Below, 2nd Embodiment of this invention is described with reference to drawings. The present embodiment is a double-sided sliding door opening and closing device 400 installed at an entrance of a store or the like. FIG. 14 shows the overall configuration of the sliding door opening and closing device 400 in the open state.

  In FIG. 14, the slide door opening / closing device 400 mainly includes a door support mechanism 402, a footrest support mechanism 403, an opening / closing operation mechanism 404, connecting bodies 5F, 5B, and biasing mechanisms 6F, 6B.

(Configuration of door support mechanism 402)
The door support mechanism 402 includes a base 420, a pair of left and right columns 421, 422, and an upper beam 423. The base 420 is fixed to the floor surface. Both struts 421 and 422 are fixed to the base 420 and are erected vertically from the base 420. The upper beam 423 is installed horizontally between the upper ends of both the columns 421 and 422. A left wall plate and a right wall plate (not shown) are fixed to both the columns 421 and 422, are fixed to the base 420 and the upper beam 423, respectively, and extend vertically from the base 420. In FIG. 14, the space between the two wall plates is defined as an entrance / exit 425. The base 420 has a front base region 420F that extends in front of the entrance / exit 425 and a rear base region 420B that extends behind the entrance / exit 425.

  A support rail 426 is fixed to the upper beam 423 and extends horizontally. Two slide doors 27 </ b> R and 27 </ b> L are provided to open and close the entrance / exit 425. A pair of support fittings 28R, 29R is fixed to the upper end of the slide door 27R. A pair of upper rollers 30R and 31R are rotatably attached to both support fittings 28R and 29R. A pair of support fittings 28L, 29L is fixed to the upper end of the slide door 27L. A pair of upper rollers 30L and 31L are rotatably attached to both support brackets 28L and 29L. The upper rollers 30R, 31R, 30L, and 31L are engaged with the support rail 426 and roll on the support rail 426. These upper rollers allow the slide doors 27R and 27L to move in the left-right direction along the support rail 426. In the present embodiment, the opening / closing direction of the slide doors 27R, 27L is the left-right direction. A lower cover corresponding to the lower cover 32 shown in FIG. 1 is attached to the lower front ends of the slide doors 27R and 27L by fixing means such as screws. FIG. 14 shows the slide doors 27R and 27L with the lower cover removed.

(Configuration of the platform support mechanism 403)
The configuration of the step support mechanism 403 will be described with reference to FIGS. 15 to 18. As shown in FIG. 14, the platform support mechanism 403 is disposed across the front base region 420F of the entrance / exit 425 and the rear base region 420B. The step support mechanism 403 mainly includes a support substrate 440, eight link mechanisms 41F to 44F, 41B to 44B, and a step 445.

  The support substrate 440 is fixed to the base 420 by fixing means such as screws. The support substrate 440 is fixed to the base 420, the front support region 440F disposed in the front base region 420F, the rear support region 440B disposed in the rear base region 420B, and the space between both support regions 440F and 440B. And an intermediate support region 440M. In addition, the support substrate 440 includes an extension portion 440R extending rightward and an extension portion 440L extending leftward in the intermediate support region 440M. As shown in FIG. 18, eight link mechanisms 41F to 44F and 41B to 44B are attached to the support substrate 440 by fixing means such as screws. The link mechanism 41F is disposed in the front right region of the front support region 440F, the link mechanism 42F is disposed in the front left region of the front support region 440F, and the link mechanism 43F is disposed in the rear right region of the front support region 440F. 44F is arranged in the left rear region of the front support region 440F. The link mechanism 41B is disposed in the front right region of the rear support region 440B, the link mechanism 42B is disposed in the front left region of the rear support region 440B, and the link mechanism 43B is disposed in the rear right region of the rear support region 440B. 44B is arranged in the rear left region of the rear support region 440B.

  Each of the eight link mechanisms 41F to 44F and 41B to 44B includes a plurality of links that can rotate around a predetermined axis. In each of the link mechanisms 41F to 44F and 41B to 44B, the rotation axes of these links are arranged so as to extend in the front-rear direction shown in FIG. The detailed configuration of each link mechanism will be described later.

(Configuration of step 445)
A detailed configuration of the step 445 will be described with reference to FIGS. 15 to 17. The step 445 includes frame assemblies 46F and 46B, three fixing plates 447 to 449, two decorative plates 450 and 451, and six skirt portions 453F1 to 453F3 and 453B1 to 453B3.

  In FIG. 17, the frame assembly 46 </ b> F is framed so as to surround the arrangement area of each link mechanism of the four link mechanisms 41 </ b> F to 44 </ b> F. The frame assembly 46F has the same structure as the frame assembly 46 shown in FIG. 4, and includes connection members corresponding to the connection members 46A1 to 46A3, 46B1 to 46B3, 46C1 to 46C3, and 46D1 to 46D3, respectively. The frame assembly 46B is framed so as to surround the arrangement area of the link mechanisms of the four link mechanisms 41B to 44B. The frame assembly 46B has the same structure as the frame assembly 46 shown in FIG. 4, and has connection members corresponding to the connection members 46A1 to 46A3, 46B1 to 46B3, 46C1 to 46C3, and 46D1 to 46D3, respectively. A space in which a part of the opening / closing operation mechanism 404 is arranged is formed in the intermediate support region 440M of the support substrate 440 between the frame assembly 46F and the frame assembly 46B.

  16 and 17, the fixing plate 447 is fixed to the frame assembly 46F by a fixing means such as a screw or welding processing in a state of covering the arrangement region of the frame assembly 46F. The fixed plate 447 has an adjustment opening 447A in a region on the right side thereof. The fixing plate 448 covers the arrangement area of the frame assembly 46B and is fixed to the frame assembly 46B by fixing means such as screws or welding. The fixed plate 448 has an adjustment opening 448A in a region on the right side thereof. The fixed plate 449 extends above the intermediate support region 440M of the support substrate 440 including the extended portions 440R and 440L, and extends to the left from the extended portion 440R, and extends leftward from the extended portion 440L. A fixed extension portion 449L. The fixing plate 449 is fixed to a part of connecting members of the frame assembly 46F and a part of connecting members of the frame assembly 46B by fixing means such as screws, or welding.

  In FIG. 15, two decorative plates 450 and 451 are attached to the fixing plates 447 and 448 by fixing means such as screws, respectively.

  15 and 16, six skirt portions 453F1 to 453F3 and 453B1 to 453B3 are swingably attached around the frame assemblies 46F and 46B by hinges, and extend obliquely downward. Specifically, the skirt portion 453F1 is attached to the right end portion of the frame assembly 46F with a hinge, the skirt portion 453F2 is attached to the front end portion of the frame assembly 46F, and the skirt portion 453F3 is attached to the left end portion of the frame assembly 46F. Attached to hinges. The skirt portion 453B1 is attached to the right end portion of the frame assembly 46B by a hinge, the skirt portion 453B2 is attached to the rear end portion of the frame assembly 46B by a hinge, and the skirt portion 453B3 is attached to the left end portion of the frame assembly 46B. It is done.

(Configuration of the opening / closing operation mechanism 404)
The configuration of the opening / closing operation mechanism 404 will be described with reference to FIGS. 14 and 17. The opening / closing operation mechanism 404 includes two opening / closing operation mechanisms 4R, 4L. Both opening / closing operation mechanisms 4R, 4L have the same basic configuration as the opening / closing operation mechanism 4 shown in FIG. The opening / closing operation mechanism 4R mainly includes an operation rail 90R, an interlocking mechanism 91R, and a pressing roll 92R. As shown in FIG. 14, the operation rail 90R is fixed to the lower end portion of the slide door 27R, and extends in the left-right direction while being inclined upward. The operating rail 90R has a groove 90RA opened forward so that the pressing roll 92R is fitted. The press roll 92R can press the upper edge or the lower edge extending in the left-right direction of the groove 90RA in a state of being fitted in the groove 90RA.

  The interlocking mechanism 91R is a mechanism that interlocks the lifting / lowering operation of the step 445 and the opening / closing operation of the slide door 27R, and has the same basic configuration as the interlocking mechanism 91 shown in FIG. The interlocking mechanism 91R includes a pair of attachment blocks 97RA and 97RB corresponding to the pair of attachment blocks 97A and 97B of the interlocking mechanism 91, and a pair of rollers 98RA and 98RB corresponding to the pair of rollers 98A and 98B of the interlocking mechanism 91. . Both attachment blocks 97RA and 97RB are attached to the lower surface of the fixed extension portion 449R by fixing means such as screws. Both rollers 98RA, 98RB are in contact with the extended portion 440R of the support substrate 440. The interlocking mechanism 91R includes a restricting member corresponding to the restricting member 99 of the interlocking mechanism 91, but the corresponding restricting member is not illustrated in FIG.

  The opening / closing operation mechanism 4L mainly includes an operation rail 90L, an interlocking mechanism 91L, and a pressing roll 92L. As shown in FIG. 14, the operation rail 90L is fixed to the lower end portion of the slide door 27L, and extends in the left-right direction in a state of being inclined to the left. The operating rail 90L has a groove 90LA opened forward so that the pressing roll 92L is fitted. The pressing roll 92L can press the upper edge or the lower edge extending in the left-right direction of the groove 90LA in a state of being fitted in the groove 90LA.

  The interlocking mechanism 91L is a mechanism that interlocks the lifting / lowering operation of the step 445 and the opening / closing operation of the slide door 27L, and has the same basic configuration as the interlocking mechanism 91 shown in FIG. The interlocking mechanism 91L includes a pair of attachment blocks 97LA and 97LB corresponding to the pair of attachment blocks 97A and 97B of the interlocking mechanism 91, and a pair of rollers 98LA and 98LB corresponding to the pair of rollers 98A and 98B of the interlocking mechanism 91. . Both attachment blocks 97LA and 97LB are attached to the lower surface of the fixed extension portion 449L by fixing means such as screws. Both rollers 98LA and 98LB are in contact with the extended portion 440L of the support substrate 440. The interlocking mechanism 91L includes a restricting member corresponding to the restricting member 99 of the interlocking mechanism 91, but the corresponding restricting member is not illustrated in FIG.

(Structure of connected body 5F, 5B)
The connection bodies 5F and 5B will be described with reference to FIG. The coupling bodies 5F and 5B have the same basic configuration as the coupling body 5 shown in FIG. The coupling bodies 5F and 5B are arranged in spaces defined by coupling members corresponding to the coupling members 46A1, 46B1, 46C1, and 46D1 shown in FIG. The connecting bodies 5F and 5B include right connecting plate portions 110F and 110B and left connecting plate portions 111F and 111B respectively corresponding to the front connecting plate portion 110, the rear connecting plate portion 111, and the long connecting plate portion 112 shown in FIG. , And longitudinal connecting plate portions 112F and 112B.

  The right connecting plate part 110F of the connecting body 5F includes a front standing part 110FA and a rear standing part 110FB. The right standing portion 110FA is rotatably connected to the slidable connecting shaft 67F of the link mechanism 41F, and the left standing portion 110FB is rotatably connected to the slidable connecting shaft 267F of the link mechanism 43F. Is done.

  The left connecting plate portion 111F of the connecting body 5F includes a front standing portion 111FA and a rear standing portion 111FB. The front standing portion 111FA is rotatably connected to a slidable connecting shaft 167F of the link mechanism 42F, and the rear standing portion 111FB is rotatably connected to a slidable connecting shaft 367F of the link mechanism 44F. .

  The right connecting plate part 110B of the connecting body 5B includes a front standing part 110BA and a rear standing part 110BB. The front standing portion 110BA is rotatably connected to the slidable connecting shaft 67B of the link mechanism 41B, and the rear standing portion 110BB is rotatably connected to the slidable connecting shaft 267B of the link mechanism 43B. .

  The left connecting plate portion 111B of the connecting body 5B includes a front standing portion 111BA and a rear standing portion 111BB. The front standing portion 111BA is rotatably connected to a slidable connecting shaft 167B of the link mechanism 42B, and the rear standing portion 111BB is rotatably connected to a slidable connecting shaft 367B of the link mechanism 44B. .

(Configuration of urging mechanisms 6F and 6B)
The urging mechanisms 6F and 6B will be described with reference to FIG. Each of the urging mechanisms 6F and 6B has the same basic configuration as the urging mechanism 6 shown in FIG. The biasing mechanisms 6F and 6B include a pair of support tools 120F and 121F corresponding to the pair of support tools 120 and 121, the adjustment spring hook body 122, the spring hook body 123, and the pair of coil springs 132 and 133, respectively. , 120B, 121B, adjustment spring hanging bodies 122F, 122B, spring hanging bodies 123F, 123B, and a pair of coil springs 132F, 133F, 132B, 133B. The urging mechanisms 6F and 6B are respectively disposed in spaces defined by connecting members corresponding to the connecting members 46A1, 46B1, 46C1, and 46D1 shown in FIG.

  The adjustment spring hanging bodies 122F and 122B of the urging mechanisms 406F and 406B include a pair of long grooves 124F and 125F and a pair of long grooves 124F and 125F and 124B respectively corresponding to the pair of spring hanging pieces 126 and 127 shown in FIG. 125B and a pair of spring hooks 126F, 127F, 126B, 127B. The spring hooks 123F and 123B of the urging mechanisms 6F and 6B include a pair of spring hooks 130F, 131F, 130B, and 131B corresponding to the pair of spring hooks 130 and 131 shown in FIG. Both coil springs 132F and 133F are stretched between the two spring hanging pieces 126F and 127F and the two spring hanging pieces 130F and 131F, respectively. Both coil springs 132B and 133B are stretched between the two spring hanging pieces 126B and 127B and the two spring hanging pieces 130B and 131B, respectively. The two coil springs 132F and 133F of the urging mechanism 6F move the connecting body 5F rightward, that is, the connecting shafts 67F, 167F, 267F, and 367F that can slide the link mechanisms 41F to 44F. Always energized toward 68F, 168F, 268F, 368F. The two coil springs 132B and 133B of the urging mechanism 6B are connected to the connecting body 5B in the right direction, that is, the connecting shaft that can rotate the connecting shafts 67B, 167B, 267B, and 367B of the link mechanisms 41B to 44B. 68B, 168B, 268B, 368B are always energized.

  In order to adjust the position of the adjustment spring hanging bodies 122F, 122B of the urging mechanisms 6F, 6B in the left-right direction, adjustment screws corresponding to the adjustment screws 128, 129 shown in FIG. , 451 are removed and exposed through the adjustment openings 447A, 448A. The operator can adjust the positions of the adjustment spring hanging bodies 122F and 122B in the front-rear direction through the adjustment openings 447A and 448A. FIG. 16 does not show the adjusting screw.

[Operation and Action of Slide Door Opening / Closing Device 400]
The operation and action of the sliding door opening and closing device 400 will be briefly described with reference to FIG. The operation of the slide door opening / closing device 400 is basically the same as the operation of the slide door opening / closing device 1 except for the operation of opening and closing both the slide doors 27R and 27L.

(Operation for opening the sliding doors 27R and 27L)
When a person passing through the entrance / exit 425 steps on the step 445, the step 445 descends while being supported by the eight link mechanisms 41F to 44F and 41B to 44B. When the step 445 descends, the connecting shafts attached to the interlocking levers 94R and 94L of the interlocking mechanisms 91R and 91L receive the stepping force from the step 445.

  Due to the stepping force, the interlocking lever 94R tends to rotate downward in FIG. 17 around the contact point between the pair of rollers 98RA and 98RB and the extended portion 440R of the support substrate 440. As the interlocking lever 94R rotates, the roll support receives an external force that moves downward. The pressing roll 92R receives an external force from the roll support and presses the lower edge of the operating rail 90R forming the groove 90RA of the operating rail 90R in FIG. Of the pressing force of the pressing roll 92R, the horizontal component force acts on the operating rail 90R as a force for opening the sliding door 27R. With this horizontal component, the slide door 27R moves to the right and is opened.

  Further, the interlocking lever 94L tends to rotate downward in FIG. 17 around the contact point between the pair of rollers 98LA and 98LB and the extended portion 440L of the support substrate 440 by the stepping force. As the interlocking lever 94L rotates, the roll support receives an external force that moves downward. The pressing roll 92L receives an external force from the roll support and presses the lower edge of the operating rail 90L forming the groove 90LA of the operating rail 90L in FIG. Of the pressing force of the pressing roll 92L, the horizontal component force acts on the operating rail 90L as a force for opening the slide door 27L. With this horizontal component force, the slide door 27L moves leftward and is opened.

(Operation in which the slide doors 27R and 27L are closed)
In FIG. 18, the elastic urging forces of the coil springs 132F and 133F are applied to the four connecting shafts 67F of the four link mechanisms 41F to 44F by the right connecting plate portion 110F, the left connecting plate portion 111F, and the long connecting plate portion 112F. , 167F, 267F, 367F. Further, the elastic urging forces of the coil springs 132B and 133B are applied to the four connecting shafts 67B and 167B of the four link mechanisms 41B to 44B by the right connecting plate portion 110B, the left connecting plate portion 111B, and the long connecting plate portion 112B. 267B and 367B simultaneously. Since the elastic urging force always acts, when the stepping on the step 445 is released, the eight connecting shafts are slid simultaneously. By the simultaneous sliding of the connecting shafts, the step 445 can be smoothly raised toward the predetermined rising position while being supported by the eight link mechanisms.

  As the step 445 is raised, the interlocking levers 94R and 94L receive an upward external force from the step 445 via the connecting shaft, and the roll support receives an upward external force from the interlocking levers 94R and 94L.

  The pressing roll 92R receives an external force from the roll support and presses the upper edge of the operating rail 90R that forms the groove 90RA of the operating rail 90R in FIG. Of the pressing force of the pressing roll 92R, the horizontal component force acts on the operating rail 90R as a force for closing the sliding door 27R. Due to this horizontal component force, the slide door 27R moves to the left and is closed.

  The pressing roll 92L receives an external force from the roll support and presses the upper edge of the operating rail 90L forming the groove 90LA of the operating rail 90L in FIG. Of the pressing force of the pressing roll 92L, the horizontal component force acts on the operating rail 90L as a force for closing the sliding door 27L. With this horizontal component force, the slide door 27L moves to the right and is closed.

[Effects of Second Embodiment]
In the present embodiment, the left and right slide doors 27R and 27L are disposed so as to be openable and closable, and when the slide doors are opened, an entrance / exit 425 wider than the entrance / exit 25 in the first embodiment is formed. Four link mechanisms 41 </ b> F to 44 </ b> F are arranged in the front area of the step 425, and four link mechanisms 41 </ b> B to 44 </ b> B are arranged in the rear area of the step 425. As a result, the wide step 425 extending in the front-rear direction and the left-right direction of the doorway 425 can be supported so as to be movable up and down in parallel to the support substrate 440.

  In the present embodiment, the connecting body 5F is provided to interlock the sliding of the four link mechanisms 41F to 44F in the front area of the step 425, and the connecting body 5B is provided with the four link mechanisms 41B in the rear area of the step 425. ˜44B provided for interlocking sliding. As a result, the step 425 can be raised and lowered smoothly in each of the front region and the rear region of the step 425.

<Correspondence of configuration>
The sliding door opening and closing devices 1 and 400 and the sliding doors 27, 27R, and 27L are examples of the door opening and closing device and the door of the present invention. The door support mechanisms 2 and 402, the footrest support mechanisms 3 and 403, and the opening and closing operation mechanisms 4 and 404 are examples of the door support mechanism, the footrest support mechanism, and the opening operation mechanism of the present invention. The entrances 25 and 425 and the step platforms 45 and 445 are examples of the entrance and the exit step of the present invention. The bases 20 and 420 and the support substrates 40 and 440 are examples of members fixed to the floor surface of the present invention. The links 60 and 61 and the links 62 and 63 are examples of the first link, the second link, and the pair of link members of the present invention, and the link mechanisms 41 to 44, 41F to 44F, and 41B to 44B are the present invention. This is an example of the link mechanism. The common shaft 64 and the connection shafts 66 to 69 are examples of the common rotation shaft and the connection shaft of the present invention. The operation rails 90, 90R, 90L and the pressing rolls 92, 92R, 92L are examples of the operation rail and the pressing member of the present invention. The interlocking lever 94 and the roll support body 95 are examples of the operation member of the present invention. The front base regions 20F and 420F and the rear base regions 20B and 420B are examples of the first region and the second region of the present invention. The coupling bodies 5, 5F, 5B are examples of the coupling member of the present invention. The coil springs 132, 133, 132F, 133F, 132B, and 133B are examples of the urging member of the present invention.

<Modification>
The present invention is not limited to this embodiment, and various modifications can be made without departing from the spirit of the present invention. An example of the modification will be described below.

(1) In the first embodiment, the common shaft 64 of each link mechanism of the link mechanisms 41 to 44 and the rotation axes of the connecting shafts 66 to 69 are parallel to each other and parallel to the opening / closing direction of the door 27. However, the present invention is not limited to this configuration. For example, the structure provided with the other link mechanism which has a rotation axis orthogonal to the rotation axis of each axis | shaft of the link mechanisms 41-44 may be sufficient. In the modification shown in FIG. 19, the same components or parts as those in the first embodiment shown in FIG. In FIG. 19, the interlocking mechanism 91 and the biasing mechanism 6 are omitted. In FIG. 19, two link mechanisms 500 and 501 are arranged on the support substrate 40 together with the link mechanisms 41 to 44. Both link mechanisms 500 and 501 have the same basic configuration as the link mechanism 41 shown in FIG. However, the common axis of both the link mechanisms 500 and 501 and the rotation axis of the connecting shaft are orthogonal to the rotation axis of each axis of the link mechanisms 41 to 44. The link mechanism 500 is attached to the front support region 40F of the support substrate 40 by a fixing means such as a screw between the link mechanisms 41 and 43. The link mechanism 501 is attached to the rear support region 40B of the support substrate 40 by a fixing means such as a screw between the link mechanisms 42 and 44. The left connector 510 connects the slidable connecting shaft 67 of the link mechanism 41 and the slidable connecting shaft 167 of the link mechanism 42. The right connecting body 511 connects the slidable connecting shaft 267 of the link mechanism 43 and the slidable connecting shaft 367 of the link mechanism 44. In this modification, the opening and closing direction of the sliding door 27 and the direction of the sliding door 27 are determined by the arrangement of the rotation axes of the three link mechanisms 41, 43, and 500 and the arrangement of the rotation axes of the three link mechanisms 42, 44, and 501. It is possible to reduce the deformation of each link mechanism due to the stepping force in the direction orthogonal to the opening / closing direction, and the step 45 can be smoothly moved up and down. In addition, link mechanisms 500 and 501 whose rotation axes extend parallel to a direction orthogonal to the opening and closing direction of the slide door 27 are disposed in the front base region 20F and the rear base region 20B of the doorway 25, respectively. Even if the regions 20F and 20B become longer in the opening / closing direction depending on the size of the entrance / exit 25, it is possible to reduce the inclination of the upper surface of the step platform 45 in the opening / closing direction.

  In the modification shown in FIG. 19, three link mechanisms 41, 43, 500 support the front area of the platform 45. For example, considering a configuration in which the link mechanism 500 supports the step platform 45, when a person passing through the doorway steps on the right end portion or the left end portion of the decorative board 49, the stepping force is applied to the upper surface of the step platform 45 in the left-right direction (the makeup plate). It acts in a direction in which the upper surface of the plate 49 is inclined. With respect to the stepping force acting in the left-right direction, the link mechanism 500 uses a triangular structure having three sides as a basic structure and tries to respond with a plurality of triangular structures. As an example of the triangular structure, the first side between the portion connected by the common shaft 64 of the links 60 and 61 and the portion connected by the connecting shaft 66 of the links 60 and 61, and the links 62 and 63 Between the second side between the portion connected by the common shaft 64 and the portion connected by the connecting shaft 69 of the links 62 and 63, and the two portions connected to the connecting shafts 66 and 69 of the step platform 45, respectively. There exists a triangular structure consisting of the third side of Since the triangular structure is a structure whose shape is difficult to be deformed by an external load, the link mechanism 500 is not easily deformed by the stepping force even when the right end portion or the left end portion of the decorative board 49 is stepped on. The posture parallel to the support substrate 40 can be stably maintained without inclining the upper surface of the step 45 in the left-right direction.

  On the other hand, in the modification shown in FIG. 19, when a person who passes through the doorway steps on the front end portion of the decorative board 49, the stepping force acts in a direction in which the upper surface of the step board 45 is inclined in the front-rear direction. With respect to the stepping force acting in the front-rear direction, the two link mechanisms 41 and 43 try to have a triangular structure with three sides as a basic structure and to respond with a plurality of triangular structures. The triangular structure of the link mechanisms 41 and 43 has the same structure as the triangular structure of the link mechanism 500. Even when the front end portion of the decorative plate 49 is stepped on, the link mechanisms 41 and 43 are not easily deformed by the stepping force, and are stable in a posture parallel to the support substrate 40 without tilting the upper surface of the step base 45 in the front-rear direction. Can be maintained. Since the three link mechanisms 42, 44, and 501 that support the rear region of the step platform 45 also operate in the same manner as the three link mechanisms 41, 43, and 500, the right end portion or the left end portion of the decorative plate 50, or the decorative plate Even when the rear end of 50 is stepped on, the link mechanisms 42, 44, 501 are not easily deformed by the stepping force, and are parallel to the support substrate 40 without tilting the upper surface of the step 45 in the left-right direction and the front-rear direction. Can maintain a stable posture.

(2) In both embodiments, one slide door 27 or two slide doors 427R and 427L open and close, but the present invention is not limited to this configuration. For example, the present invention can be applied to an opening / closing device for a revolving door if a mechanism for converting the up-and-down movement of the platform to a rotational movement is provided.

(3) In both embodiments, the connecting shafts 66 and 68 of the link mechanism 41 are rotatably fitted to the circular holes 72A and 72B of the mounting blocks 71A, 71B, 77A and 77B via the bearings 70A and 70B. The connecting shafts 67 and 69 of the link mechanism 41 are slidably fitted into the long holes 75A, 81A, and 81B of the mounting blocks 74A, 74B, 80A, and 80B via the bearings 73A, 79A, and 79B. However, it is not limited to this configuration. For example, the connecting shafts 66 and 67 of the link mechanism 41 are rotatably fitted into the circular holes of the mounting blocks 71A, 71B, 74A and 74B via bearings, and the connecting shafts 68 and 69 of the link mechanism 41 are interposed via bearings. The mounting blocks 77A, 77B, 80A, 80B may be slidably fitted into the long holes.

(4) In both embodiments, as shown in FIG. 5, the connecting shafts 67 and 69 are fixed to the rear ends of the links 60 to 63, and both ends of each of the connecting shafts 67 and 69 are attached to the mounting blocks 74 </ b> A and 74 </ b> B. , 80A, 80B are configured to be slidable along the long holes 75A, 81A, 81B, etc., but both embodiments can be used as long as the end of the connecting shaft is slidably attached to the mounting block. It is not limited to the configuration. For example, a long hole or a bifurcated portion is formed at the rear end portion of the links 60 to 63, and a connecting shaft fixed to a circular hole of the mounting block is fitted to the long hole or the bifurcated portion of the links. Also good.

(5) In both embodiments, the links 60 and 61 of the link mechanism 41 are connected by the common shaft 64 and the connecting shafts 66 and 67, and the links 62 and 63 are connected by the common shaft 64 and the connecting shafts 68 and 69. Although it is a structure, it is not limited to this structure. For example, without using the connecting shafts 66 to 69, a first link set including the links 60 and 62 is connected by a common shaft, a second link set including the links 61 and 63 is connected by a common shaft, and each link set is The structure separately attached to a step board and a support substrate may be sufficient. When the link mechanism 41 is elongated in the axial direction, for example, another link may be disposed between the links 60 and 61 and connected to the connecting shafts 66 and 67. An intermediate portion of 66 and 67 may be connected to a mounting block via a bearing, and the mounting block may be attached to the step platform and the support substrate.

(6) In both embodiments, the common shaft 64 of the link mechanism 41 is connected to the upper surface of the step platform 45, 445 so that the upper surface of the step platform 45, 445 can be moved up and down while maintaining a posture parallel to the support substrate 40, 440. Although the connection shafts 66 to 69 are arranged such that the distances between the shafts 66 to 69 are the same, the present invention is not limited to this configuration. For example, the distance between the common shaft 64 and the connecting shafts 67 and 68 is the same distance, and the distance between the common shaft 64 and the connecting shafts 66 and 69 is the same distance. The connecting shafts 66 to 69 are arranged such that the distance between the common shaft 64 and the connecting shafts 67 and 68 is different from the distance between the common shaft 64 and the connecting shafts 66 and 69. It may be arranged. Further, in the case where the upper surface of the decorative plate 49 of the step platform 45 is designed from the beginning so as to be supported in a state where it is tilted and lowered toward the front, for example, the common shaft 64 and the connecting shaft 67 of the link mechanism 41. The connecting shafts 67 and 68 may be arranged so that the distances between the respective axes 68 and 68 are different.

(7) In the first embodiment, the operation rail 90 is fixed to the lower end portion of the slide door 27 in a state where the operation rail 90 is tilted upward to the right. However, the present invention is not limited to this configuration. For example, if the mechanism which reverses the raising / lowering motion of the step platform 45 and transmits it to the operating rail is provided, the operating rail may be configured to be fixed to the sliding door while being inclined downwardly to the right. Moreover, if the mechanism which transmits the raising / lowering motion of the step platform 45 to the upper end part of a slide door is provided, the structure which an operation rail is fixed to the upper end part of a slide door may be sufficient.

(8) In the first embodiment, the roll support 95 is fixed to the interlocking lever 94, and the interlocking lever 94 is fixed to the fixing plate 47 of the step platform 45 by the mounting blocks 97A and 97B. Not. For example, a configuration in which the roll support 95 is directly fixed to a part of the platform 45 may be employed.

(9) In both embodiments, the step 45 is returned to the predetermined raised position by the elastic biasing force of the biasing mechanisms 6, 6 F, 6 B including the coil spring, but when the step is released, the step is predetermined. The configuration is not limited to the configuration of both embodiments as long as the configuration returns to the raised position. For example, the configuration may be such that the gravity of the return weight acts on the step or the slide door. Further, if the slide door is supported so that the gravity of the slide door itself always acts in the direction in which the slide door is closed, a return weight or elastic means can be dispensed with.

(10) In both embodiments, a pair of upper rollers 30, 31, 30R, 31R and the like are engaged with the support rails 26, 426 so that the slide doors 27, 27R, 27L are supported to be openable and closable. However, it is not limited to this configuration. For example, the lower roller is rotatably attached to the base 20, 420, and the lower roller is engaged with the lower edge of the slide doors 27, 27R, 27L from below. Thereby, the structure which a slide door moves to the left-right direction along a support rail may be sufficient.

(11) In both embodiments, the predetermined lower position of the step platform 45 is such that the lower surfaces of the front end portions of the links 60, 61 abut against the connecting shaft 68 and the lower surfaces of the rear end portions of the links 62, 63 contact the connecting shaft 67. Although it is prescribed | regulated by contacting, it is not limited to this structure. For example, the receiving member provided on the upper surface of the support substrate 40 comes into contact with the lower surfaces of the fixing plates 47, 447, and 448 of the steps 45 and 445, whereby the predetermined lowering position of the steps 45 and 445 is defined. There may be. In this case, it is preferable that the receiving member is made of a material having a buffering effect, and the protruding amount of the receiving member from the support substrate 40 can be adjusted.

(12) In both embodiments, the connecting bodies 5, 5F, and 5B connect the four slidable connecting shafts 67, 167, 267, 367, etc., such as the four link mechanisms 41-44. However, it is not limited to this configuration. For example, each connection body may be configured to connect four common shafts of four link mechanisms. Further, in each link mechanism, the connecting portion is fixed to the link between the slidable connecting shaft and the common shaft, and each connecting body connects the four connecting portions of the four link mechanisms. Also good.

(13) In the second embodiment, the two coupling bodies 5F and 5B are arranged separately at the front and rear, but the present invention is not limited to this configuration. For example, the structure provided with another connection body which connects both the connection bodies 5F and 5B in the front-back direction may be sufficient.

DESCRIPTION OF SYMBOLS 1,400 Sliding door opening / closing apparatus 2,402 Door support mechanism 3,403 Step support mechanism 4,404 Opening / closing operation mechanism 5,5F, 5B Connecting body 20,420 Base 20F, 420F Front base area 20B, 420B Rear base area 25, 425 Entrance 27, 27R, 27L Slide door 40, 440 Support substrate 41-44, 41F-44F, 41B-44F Link mechanism 45, 445 Step platform 60-63 Link 64 Common shaft 66-69 Connection shaft 90, 90R, 90L Actuating rail 92, 92R, 92L Pressing roll 94 Interlocking lever 132, 133, 132F, 133F, 132B, 133B Coil spring
that's all

Claims (9)

A door support mechanism for opening and closing a door that opens and closes the doorway;
A platform that is located close to the doorway;
A step support mechanism for supporting the step so that it can be raised and lowered with respect to the floor surface or a member fixed to the floor surface;
An opening operation mechanism that applies the stepping force acting on the stepping platform to the door as a force for opening the door;
A connecting member,
The platform support mechanism
A first link mechanism having two links in which an intermediate portion is pivotally connected to each other about a first axis in order to raise and lower a stepping platform in a parallel posture with respect to a floor surface or a member fixed to the floor surface When,
Two links whose intermediate portions are pivotally connected to each other around a second axis parallel to the first axis in order to raise and lower the platform in a parallel posture with respect to the floor or a member fixed to the floor A second link mechanism having
Two of the four ends of the two links of each link mechanism rotate as a rotation end to the floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Each supported as possible,
The remaining two ends of the four ends of the two links of each link mechanism are used as sliding ends for the floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Each slidably supported,
Both directions in which the direction from one rotation end of the first link mechanism toward the specific first sliding end is the same as the direction from one rotation end of the second link mechanism toward the specific second sliding end In the arrangement relationship of the link mechanism, the connecting member is positioned in the range from the first axis to the specific first sliding end and in the range from the second axis to the specific second sliding end. to connect between the second connecting portion,
A 1st link mechanism and a 2nd link mechanism are door opening / closing apparatuses arrange | positioned at intervals in the direction orthogonal to a 1st axis .   The door opening and closing device according to claim 1, wherein the connecting member connects a specific first sliding end as the first connecting portion and a specific second sliding end as the second connecting portion. A door support mechanism for opening and closing a door that opens and closes the doorway;
A platform that is located close to the doorway;
A step support mechanism for supporting the step so that it can be raised and lowered with respect to the floor surface or a member fixed to the floor surface;
An opening operation mechanism that applies the stepping force acting on the stepping platform to the door as a force for opening the door;
A connecting member,
The platform support mechanism
An intermediate portion has a first link and a second link that are pivotally connected to each other about a first axis in order to raise and lower the platform in a parallel posture with respect to the floor surface or a member fixed to the floor surface. A first link mechanism;
A third link in which an intermediate portion is pivotally connected to each other around a second axis parallel to the first axis in order to raise and lower the platform in a parallel posture with respect to the floor or a member fixed to the floor. And a second link mechanism having a fourth link,
One end of the first link and one end of the second link that are located on the same side with respect to the first axis are rotated to a floor surface or a member fixed to the floor surface and a step or a member fixed to the step. The other end of the first link and the other end of the second link are supported as a moving end, and the other end of the second link is a step or a member fixed to the step and a floor or a member fixed to the floor. Slidably supported as sliding ends,
The one end of the third link and the one end of the fourth link located on the same side with respect to the second axis are rotated on the floor surface or a member fixed to the floor surface and a step or a member fixed to the step. The other end of the third link and the other end of the fourth link are supported as a moving end, and the other end of the fourth link is a step or a member fixed to the step and a floor or a member fixed to the floor. Slidably supported as sliding ends,
The first link mechanism and the second link mechanism are arranged so that the direction from one end of the first and second links toward the other end is the same as the direction from one end to the other end of the third and fourth links. ,
The connecting member is between the first connecting part located in the range from the first axis to the other end of the first link and the second connecting part located in the range from the second axis to the other end of the third link, or Connecting between the first connecting portion located in the range from the first axis to the other end of the second link and the second connecting portion located in the range from the second axis to the other end of the fourth link ;
A 1st link mechanism and a 2nd link mechanism are door opening / closing apparatuses arrange | positioned at intervals in the direction orthogonal to a 1st axis .   The connecting member is slid onto the floor surface or the other end of the second link as the first connecting portion that is slidably supported by the member fixed to the floor surface, and the floor surface or the member fixed to the floor surface. The door opening and closing device according to claim 3, wherein the door is connected to the other end of the fourth link as a second connecting portion that is movably supported. Each link of the first link and the second link, or each link of the third link and the fourth link includes a pair of link members whose one end and the other end are respectively connected by two connecting shafts,
An intermediate portion of the pair of link members of the first link or the third link and an intermediate portion of the pair of link members of the second link or the fourth link are connected to be rotatable by a common rotation shaft,
The connecting shaft that connects one end of the pair of link members of the first link or the third link and the connecting shaft that connects one end of the pair of link members of the second link or the fourth link are fixed to the floor surface or the floor surface. Supported by the member to be rotated and the step or the member fixed to the step,
The connecting shaft that connects the other ends of the pair of link members of the first link or the third link and the connecting shaft that connects the other ends of the pair of link members of the second link or the fourth link are fixed to the step or the step. Slidably supported by the member to be made and the floor surface, or the member fixed to the floor surface,
The connecting member is between a connecting shaft that connects the other ends of the pair of link members of the first link and a connecting shaft that connects the other ends of the pair of link members of the third link, or a pair of second links. The door opening and closing device according to claim 3 which connects between the connecting shaft which connects the other end of a link member, and the connecting shaft which connects the other end of a pair of link members of the 4th link. The platform support mechanism
In addition to the first link mechanism and the second link mechanism,
Two links whose intermediate portions are pivotally connected to each other around a third axis parallel to the first axis in order to raise and lower the platform in a parallel posture with respect to the floor or a member fixed to the floor A third link mechanism having
Two of the four ends of the two links of the third link mechanism rotate as a rotation end to a floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Each supported movably,
The remaining two ends of the four ends of the two links of the third link mechanism are sliding ends on the floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Are slidably supported as
The third link mechanism is arranged in a state parallel to the first link mechanism in a direction parallel to the first axis.
The second link mechanism is arranged in a state in series with the first link mechanism in a direction orthogonal to the first axis.
A direction from one rotation end of the first link mechanism toward a specific first sliding end, a direction from one rotation end of the second link mechanism toward a specific second sliding end, and a third link mechanism In the arrangement relationship of the first to third link mechanisms in which the direction from one rotation end to the specific third sliding end is the same, the connecting member is connected to the specific first slide from the first axis. A first connecting portion located in a range to the moving end, a second connecting portion located in a range from the second axis to the specific second sliding end, and a third axis to the specific third sliding end. The door opening and closing device according to any one of claims 1 to 5 , wherein the door connecting device is connected to a third connecting portion located in a range. A door support mechanism for opening and closing a door that opens and closes the doorway;
A platform that is located close to the doorway;
A step support mechanism for supporting the step so that it can be raised and lowered with respect to the floor surface or a member fixed to the floor surface;
An opening operation mechanism that applies the stepping force acting on the stepping platform to the door as a force for opening the door;
A connecting member,
The platform support mechanism
A first link mechanism having two links in which an intermediate portion is pivotally connected to each other around a first axis;
A second link mechanism having two links that are pivotally connected to each other about a second axis parallel to the first axis;
Two of the four ends of the two links of each link mechanism rotate as a rotation end to the floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Each supported as possible,
The remaining two ends of the four ends of the two links of each link mechanism are used as sliding ends for the floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Each slidably supported,
Both directions in which the direction from one rotation end of the first link mechanism toward the specific first sliding end is the same as the direction from one rotation end of the second link mechanism toward the specific second sliding end In the arrangement relationship of the link mechanism, the connecting member is positioned in the range from the first axis to the specific first sliding end and in the range from the second axis to the specific second sliding end. Connecting between the second connecting part and
The opening operation mechanism is connected to an operation member connected to a step or a member fixed to the step, an operation rail fixed to the door and extending in an inclined state in the door opening and closing direction, and one end of the operation member. A pressing member that presses the operating rail in order to apply a force to open the operating rail to the operating rail,
The intermediate part of the operating member of the opening mechanism is rotatably supported by a step or a member fixed to the step,
The other end of the actuating member abuts to the door opening and closing device on a member to be fixed to the floor or floor surface. A door support mechanism for opening and closing a door that opens and closes the doorway;
A platform that extends to the first region and the second region respectively located on both sides of the doorway in a direction passing through the doorway;
A step support mechanism for supporting the step so that it can be raised and lowered with respect to the floor surface or a member fixed to the floor surface;
An opening operation mechanism that applies the stepping force acting on the stepping platform to the door as a force for opening the door;
A connecting member,
The platform support mechanism includes a first link mechanism and a second link mechanism arranged in each of the first region and the second region,
The first link mechanism has two links in which an intermediate portion is pivotally connected to each other around a first axis in order to raise and lower the platform in a parallel posture with respect to the floor surface or a member fixed to the floor surface. Have
The second link mechanism is capable of rotating relative to each other about a second axis parallel to the first axis in order to raise and lower the platform in a parallel posture with respect to the floor surface or a member fixed to the floor surface. Has two links to be connected,
Two of the four ends of the two links of each link mechanism rotate as a rotation end to the floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Each supported as possible,
The remaining two ends of the four ends of the two links of each link mechanism are used as sliding ends for the floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Each slidably supported,
Both directions in which the direction from one rotation end of the first link mechanism toward the specific first sliding end is the same as the direction from one rotation end of the second link mechanism toward the specific second sliding end In the arrangement relationship of the link mechanism, the connecting member is positioned in the range from the first axis to the specific first sliding end and in the range from the second axis to the specific second sliding end. to connect between the second connecting portion,
A 1st link mechanism and a 2nd link mechanism are door opening / closing apparatuses arrange | positioned at intervals in the direction orthogonal to a 1st axis .   A door support mechanism for opening and closing a door that opens and closes the doorway;
  A platform that extends to the first region and the second region respectively located on both sides of the doorway in a direction passing through the doorway;
  A step support mechanism for supporting the step so that it can be raised and lowered with respect to the floor surface or a member fixed to the floor surface;
  An opening operation mechanism that applies the stepping force acting on the stepping platform to the door as a force for opening the door;
  A connecting member,
  The step support mechanism includes a first link mechanism disposed in the first region, a second link mechanism disposed in the second region, and a third link mechanism disposed in the first region,
  The first link mechanism has two links in which an intermediate portion is pivotally connected to each other around a first axis in order to raise and lower the platform in a parallel posture with respect to the floor surface or a member fixed to the floor surface. Have
  The second link mechanism is capable of rotating relative to each other about a second axis parallel to the first axis in order to raise and lower the platform in a parallel posture with respect to the floor surface or a member fixed to the floor surface. Has two links to be connected,
  The third link mechanism is configured such that an intermediate portion can rotate around a third axis parallel to the first axis in order to raise and lower the platform in a posture parallel to the floor surface or a member fixed to the floor surface. Has two links to be connected,
  Two of the four ends of the two links of each link mechanism rotate as a rotation end to the floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Each supported as possible,
  The remaining two ends of the four ends of the two links of each link mechanism are used as sliding ends for the floor surface or a member fixed to the floor surface and a step or a member fixed to the step. Each slidably supported,
  The connecting member is arranged extending over both the first region and the second region,
  A direction from one rotation end of the first link mechanism toward a specific first sliding end, a direction from one rotation end of the second link mechanism toward a specific second sliding end, and a third link mechanism In the arrangement relationship of the first to third link mechanisms in which the direction from one rotation end to the specific third sliding end is the same, the connecting member is connected to the specific first slide from the first axis. A first connecting portion located in a range to the moving end, a second connecting portion located in a range from the second axis to the specific second sliding end, and a third axis to the specific third sliding end. Connecting the third connecting portion located in the range,
  A 1st link mechanism and a 2nd link mechanism are door opening / closing apparatuses arrange | positioned at intervals in the direction orthogonal to a 1st axis.

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