JP6249288B2 - Elevator door opening and closing device - Google Patents

Description

  The present invention relates to an elevator door opening and closing device having a so-called safety shoe structure.

  A general elevator includes a car guide rail for guiding a car and a car, a counterweight, a guide rail for a counterweight, a rope connecting the car and the counterweight, and hoisting in the hoistway. Equipped with a machine.

  The elevator drives the rope by the hoisting machine, thereby moving the car up and down along the guide rail for the car and moving the balance weight up and down along the guide rail for the counterweight.

  The car can move up and down the hoistway and can stop at a landing provided on each floor of the building. The car includes a car-side door opening / closing device. A landing-side door opening / closing device is provided at the landing so as to correspond to the car-side door opening / closing device.

  The car-side door opening and closing device is configured to be openable and closable with respect to the doorway formed in the car, disposed below the door, a sill that guides the door in the opening and closing direction, and foreign matter exists at the doorway In this case, a detection device that detects the presence of the foreign object by contacting the foreign object during the door closing operation is provided (see Patent Documents 1 to 3).

  This detection apparatus includes a detection body that moves in a predetermined direction by contacting a foreign object. This detection body is generally called a safety shoe. Further, the detection device includes a switch that can be activated by the movement of the safety shoe during the door closing operation. The detection device can detect the presence of the foreign matter by the safety shoe being pushed in contact with the foreign matter during the door closing operation and the switch operating. The car-side door opening / closing device reverses the door from the closing operation to the opening operation when the detection device detects the presence of a foreign object.

  Furthermore, the detection device can detect a foreign object coming into contact with the safety shoe in a direction orthogonal to the door opening / closing direction, that is, a direction perpendicular to the door surface. (See Patent Documents 2 and 3).

JP 2013-35677 A JP 2005-200195 A JP 2011-219192 A

  As described above, when a foreign object contacts in a direction orthogonal to the door opening / closing direction, in order to detect the presence of the foreign object, the safety shoe is displaced relative to the direction orthogonal to the door opening / closing direction ( (Deformation) possible to be configured. Furthermore, in order to return the safety shoe displaced in this direction to the original position, it is necessary to use an elastic member such as a spring member.

  Therefore, in the conventional door opening and closing device, the structure of the safety shoe is complicated and the number of parts is increased.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an elevator door opening / closing device that has a simple structure and can detect contact of a foreign object in a direction orthogonal to the door opening / closing direction without increasing the number of components.

An elevator door opening and closing apparatus according to the present invention includes a door, a long sill that guides the door in the opening and closing direction, and a detection device that can detect the foreign object by contacting the foreign object during the door closing operation. Prepare. The detection device includes a detection body that is supported by the door and detects the presence of the foreign material by moving in a predetermined direction when the foreign material contacts the foreign material. The sill engages a part of the detection body so that the detection body can move in accordance with the movement of the door in the opening / closing direction, and the first groove part where the part of the door engages to guide the door in the opening / closing direction. A second groove. The second groove portion includes a guide portion that guides the detection body upward when a force along a direction orthogonal to the door opening / closing direction is applied to the detection body during the door closing operation. The detection unit is guided upward by the guide portion, so that the detection device detects that a force along a direction orthogonal to the opening / closing direction of the door is applied.

  According to this configuration, when a foreign object comes into contact with the detection body and a force along a direction orthogonal to the door opening / closing direction acts on the detection body, the detection body is guided upward by the guide portion in the second groove portion of the sill. The Therefore, if the switch is operated by the detection body that has moved upward, the detection device can detect the presence of a foreign object. As described above, since the foreign matter can be detected only by forming the second groove portion in the sill, the door opening and closing device is configured with a simple structure without increasing the number of components.

  Moreover, according to the elevator door opening / closing apparatus according to the present invention, it is desirable that the guide portion has an inclined surface that contacts the detection body and is inclined so as to guide the detection body upward.

  According to the elevator door opening and closing apparatus according to the present invention, the detection body includes the engagement portion that engages with the second groove portion, and the engagement portion is a tapered projecting portion that is guided by the inclined surface. It is desirable to be configured as

  The elevator door opening and closing device according to the present invention has a simple structure, and can detect contact of a foreign object in a direction orthogonal to the door opening and closing direction without increasing the number of components.

FIG. 1 is a perspective view showing the overall configuration of the elevator. FIG. 2 is a rear view showing the door opening and closing device. FIG. 3 is a rear view showing a part of the door opening and closing device. FIG. 4 is a side view showing a main part of the door opening and closing device.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a perspective view showing the overall configuration of the elevator. FIG. 1 illustrates a so-called machine roomless type elevator that does not have a machine room.

  As shown in FIG. 1, the elevator has a car 2, a first guide rail 3 that guides the car 2, a counterweight 4, and a second guide that guides the counterweight 4 in the hoistway 1. A rail 6, a rope 6 that connects the car 2 and the counterweight 4, and a hoisting machine 7 are provided.

  Furthermore, a return wheel 8 for winding the rope 6 is disposed on the upper part of the hoistway 1. In the lower part of the hoistway 1, a control panel 9 for controlling the hoisting machine 7, a speed governor 10 for regulating the speed of the elevator, and a shock absorber 11 are further provided.

  The elevator moves the car 2 up and down along the first guide rail 3 by driving the hoisting machine 7 via the control panel 9. The hoisting machine 7 includes a traction sheave 12, and can drive the car 2 up and down by driving the rope 6 through the traction sheave 12.

  Since the counterweight 4 is connected to the car 2 via the rope 6, the counterweight 4 moves up and down along the second guide rail 5 in accordance with the vertical movement of the car 2, contrary to the movement of the car 2. By connecting the counterweight 4 to the car 2, the hoisting machine 7 can move the car 2 up and down with small power. The governor 10 can stop the car 2 when the speed of the vertical movement of the car 2 exceeds a specified value. When the shock absorber 11 comes into contact with the car 2, the shock can be reduced.

  The car 2 can move up and down the hoistway 1 and can stop at a landing 13 provided on each floor of the building. As shown in FIGS. 1 and 2, the car 2 includes a car-side door opening / closing device 14. A landing-side door opening / closing device 15 is provided at the landing 13 so as to correspond to the car-side door opening / closing device 14. FIG. 1 shows a so-called center open type as an example of these door opening and closing devices 14 and 15.

  Hereinafter, as an example of the door opening and closing apparatus according to the present invention, the configuration of the car-side door opening and closing apparatus 14 will be described in detail. The car-side door opening / closing device 14 has a plurality of (for example, two) doors 21 that can move in a predetermined opening / closing direction (indicated by reference numeral X in FIGS. 2 and 3), and a long length that guides the doors 21 in the opening / closing direction X. And a detection device 23 that can detect the presence of the foreign object by contacting the foreign object during the closing operation of the door 21.

  The door 21 is configured to be capable of reciprocating along a predetermined opening / closing direction X, that is, the longitudinal direction of the sill 22 via a drive mechanism and a control device (not shown). As shown in FIG. 4, the door 21 has a guide part (guide shoe) 24 that engages with the threshold 22 and guides the door 21 in the opening / closing direction X, and a support part 25 that supports the guide part 24. 2 and 3, one of the two doors 21 is shown.

  As shown in FIGS. 2 to 4, the sill 22 is disposed below the door 21. As shown in FIG. 4, the sill 22 includes a first groove portion 26 that engages with a guide portion 24 that is a part of the door 21 to guide the door 21 in the opening / closing direction X, and a portion of the detection device 23 that is engaged. 2nd groove part 27 to be provided.

  The first groove portion 26 is formed in the upper portion 22 a of the sill 22. The 1st groove part 26 is comprised by upper opening shape. The first groove 26 is formed linearly along the longitudinal direction of the sill 22.

  The second groove portion 27 is formed in the upper portion 22 a of the sill 22. The 2nd groove part 27 is comprised by upper opening shape. The second groove 27 is formed linearly along the longitudinal direction of the sill 22. The second groove portion 27 is formed so as to be parallel to the first groove portion 26. As shown in FIG. 4, the wall surface of the 2nd groove part 27 is comprised as the inclined surfaces 27a and 27b which incline at a predetermined angle.

  The detection device 23 includes a safety shoe 30, a plurality of (for example, two) link members 31 and 32 coupled to the safety shoe 30, and a shoe switch 33 that is operated according to the movement of the safety shoe 30. In addition, in this embodiment, what employ | adopted what is called a one-side extended type safety shoe structure as the detection apparatus 23 is illustrated.

  The safety shoe 30 is configured as a long and long member along the vertical direction. The safety shoe 30 is supported by the door 21 via the link members 31 and 32. The safety shoe 30 functions as a detection body that detects the presence of a foreign object by moving in a predetermined direction when it comes into contact with the foreign object during the closing operation of the door 21.

  As shown in FIG. 4, the safety shoe 30 has an engaging portion 35 that engages with the second groove portion 27 of the sill 22. The engaging part 35 is formed in the lower part of the safety shoe 30 as a protruding part protruding downward. The distal end portion of the engaging portion 35 is formed in a tapered shape.

  As shown in FIG. 2, the link members 31 and 32 are arranged at two locations on the upper side and the lower side of the safety shoe 30. Hereinafter, the link member 31 provided on the upper side of the safety shoe 30 is referred to as a “first link member”, and the link member 32 provided on the lower side of the safety shoe 30 is referred to as a “second link member”. In the present embodiment, the first link member 31 and the second link member 32 constitute a parallel link mechanism.

  The first link member 31 is connected to a support bracket (hereinafter referred to as “first support bracket”) 36 provided on the upper side of the safety shoe 30. More specifically, the one end portion 31 a of the first link member 31 and the first support bracket 36 are connected to each other via a connecting shaft (hereinafter referred to as “first connecting shaft”) 37 so as to be relatively rotatable. The other end 31 b of the first link member 31 is rotatably connected to the door 21 via a connecting shaft (hereinafter “second connecting shaft”) 38. The first link member 31 can perform a predetermined reciprocating motion with the second connecting shaft 38 as a fulcrum. The safety shoe 30 can reciprocate together with the first link member 31 with the first connecting shaft 37 as a fulcrum.

  The second link member 32 is connected to a support bracket (hereinafter referred to as “second support bracket”) 40 provided on the lower side of the safety shoe 30. More specifically, the one end portion 32 a of the second link member 32 and the second support bracket 40 are connected to each other via a connecting shaft (hereinafter referred to as “third connecting shaft”) 41 so as to be relatively rotatable. The other end portion 32 b of the second link member 32 is rotatably supported by the door 21 via a connecting shaft (hereinafter referred to as “fourth connecting shaft”) 42. The second link member 32 can perform a predetermined reciprocating motion with the fourth connecting shaft 42 as a fulcrum. The safety shoe 30 can reciprocate together with the second link member 32 with the third connecting shaft 41 as a fulcrum.

  An operation member 43 for operating the shoe switch 33 is provided on the other end 32 b side of the second link member 32. The operation member 43 is attached to the second link member 32 via the attachment member 44.

  As shown in FIGS. 2 and 3, the shoe switch 33 is fixed to one surface (rear surface) of the door 21. In the present embodiment, a lever-type microswitch is exemplified as the shoe switch 33. The operation member 43 is in contact (pressing) with the lever 45 of the shoe switch 33. The shoe switch 33 maintains an ON state by keeping the operating member 43 in contact with the lever 45 in a normal state, that is, in a state where no foreign matter is in contact with the safety shoe 30. The shoe switch 33 is connected to the control device via a connection line (signal line) 46.

  Hereinafter, the operation of the car-side door opening / closing device 14 according to the present invention will be described.

  As shown in FIG. 2, in a normal state, in the detection device 23 in the car-side door opening / closing device 14, the end 30 a of the safety shoe 30 protrudes in the closing direction of the door 21 from the end 21 a of the door 21. It has become. In this state, when the door 21 performs the closing operation, if foreign matter exists in the traveling direction (closing direction) of the door 21, the end 30 a of the safety shoe 30 comes into contact with the foreign matter before the door 21. Then, the safety shoe 30 is pushed by this foreign object. When the safety shoe 30 is pushed by a foreign object, the safety shoe 30 moves in a direction (opening direction) opposite to the advancing direction of the door 21 along with the rotation of the first link member 31 and the second link member 32.

  When the safety shoe 30 is pushed by a foreign object, the second link member 32 rotates together with the first link member 31 counterclockwise. By this rotation, the operation member 43 provided on the second link member 32 is separated from the lever 45 of the shoe switch 33. Then, the shoe switch 33 is turned off (OFF), and the control device detects that the switch 33 is turned off and detects the presence of a foreign object. Then, the control device reverses the door 21 in the opening direction by the drive mechanism.

  In addition to foreign matter detection as described above, the detection device 23 can detect the foreign matter in contact with the safety shoe 30 in the direction perpendicular to the opening / closing direction X of the door 21 or in the width direction perpendicular to the longitudinal direction of the sill 22. The presence of a foreign object can be detected.

  Hereinafter, the operation in this case will be described with reference to FIG. In the direction orthogonal to the opening / closing direction X of the door 21, a foreign object contacts the safety shoe 30 when, for example, an elevator user or a baggage directly contacts the safety shoe 30 when passing through the doorway of the car 2 ( A case where an elevator user or a load collides with the door 21, and the door 21 is temporarily deformed or displaced to come into contact with the safety shoe 30 as a foreign object.

  In such a case, the foreign matter comes into contact with the front portion 30b or the back portion 30c of the safety shoe 30. In the present embodiment, a case where a foreign object contacts the front portion 30b of the safety shoe 30 will be described.

  When the foreign matter comes into contact with the front portion 30b of the safety shoe 30, a force (indicated by reference numeral F) in a direction orthogonal to the opening / closing direction X of the door 21 acts on the safety shoe 30 as shown in FIG. Then, the safety shoe 30 moves in a direction orthogonal to the opening / closing direction X of the door 21 by the force F, as indicated by a two-dot chain line in FIG. At this time, the engaging portion 35 of the safety shoe 30 contacts the inclined surface 27b of the second groove portion 27 of the sill 22, and is guided upward (obliquely upward) along the inclined surface 27b. That is, the inclined surface 27 b of the second groove portion 27 functions as a guide portion that guides the safety shoe 30 upward. Similarly, the other inclined surface 27a of the second groove portion 27 can also function as a guide portion that guides the safety shoe 30 upward when the engaging portion 35 moves in a direction opposite to the above direction.

  The detection device 23 can detect this movement when the safety shoe 30 moves upward. That is, this detection can be realized by adjusting the position of the operation member 43 so that the operation member 43 moves away from the lever 45 of the shoe switch 33 when the safety shoe 30 moves upward. This detection can also be realized by operating a sub switch (not shown) different from the shoe switch 33 when the safety shoe 30 moves upward.

  According to the car-side door opening / closing device 14 described above, it is possible to detect the presence of a foreign object in a direction perpendicular to the opening / closing direction X of the door 21 only by forming the second groove portion 27 in the sill 22. Therefore, the car-side door opening / closing device 14 can detect a foreign object with a simple structure without increasing the number of parts.

  Further, the safety shoe 30 that is a detection body is guided upward by the inclined surfaces 27a and 27b of the second groove portion 27 by coming into contact with the foreign matter, but when the contact with the foreign matter is released, the safety shoe 30 is safety. Due to the weight of the shoe 30, the engaging portion 35 is guided by the inclined surfaces 27a and 27b and can automatically return to the original position. For this reason, the part for returning the safety shoe 30 to the original position is also unnecessary.

  Furthermore, since the engaging portion 35 of the safety shoe 30 is configured as a tapered protruding portion that protrudes downward, a large frictional force is exerted when contacting the inclined surfaces 27a and 27b of the second groove portion 27. It will be guided upward without occurring.

  The elevator door opening and closing device according to the present invention is not limited to the configuration of the above embodiment. Further, the elevator door opening and closing apparatus according to the present invention is not limited to the above-described effects. The elevator door opening and closing apparatus according to the present invention can be variously modified without departing from the gist of the present invention.

  In the above embodiment, the example in which the detection device 23 is provided in the car-side door opening / closing device 14 has been described, but the present invention is not limited to this. The present invention can also be applied to the landing-side door opening / closing device 15.

  In the above-described embodiment, the detection device 23 with the one-side extended safety shoe structure is illustrated, but the present invention is not limited to this, and for example, a double-side retractable safety shoe structure and other various types of detection devices 23 can be employed. .

  In the above embodiment, the micro switch is exemplified as the shoe switch 33, but the present invention is not limited to this, and other various switches can be adopted.

  DESCRIPTION OF SYMBOLS 1 ... Hoistway, 2 ... Car, 3 ... 1st guide rail, 4 ... Counterweight, 5 ... 2nd guide rail, 6 ... Rope, 7 ... Hoisting machine, 8 ... Return wheel, 9 ... Control board, 10 ... Speed governor, 11 ... shock absorber, 12 ... traction sheave, 13 ... landing, 14 ... car side door opening / closing device, 21 ... door, 22 ... sill, 22a ... upper part of sill, 23 ... detection device, 24 ... guide, 25 ... support part, 26 ... first groove part, 27 ... second groove part, 27a, 27b ... inclined surface, 30 ... safety shoe, 30a ... end part of safety shoe, 30b ... front part of safety shoe, 30c ... safety shoe Back portion, 31 ... first link member, 31a ... one end portion of the first link member, 31b ... other end portion of the first link member, 32 ... second link member, 32a ... one end portion of the second link member, 32b ... The other end of the second link member, 33. Switch ... 35 ... engaging portion, 36 ... first support bracket, 37 ... first connection shaft, 38 ... second connection shaft, 40 ... second support bracket, 41 ... third connection shaft, 42 ... fourth connection shaft, 43 ... Operation member, 44 ... Mounting member, 45 ... Lever, X ... Opening / closing direction

Claims (3)

In an elevator door opening and closing device comprising a door, a long sill that guides the door in the opening and closing direction, and a detection device capable of detecting the foreign object by contacting the foreign object during the closing operation of the door,
The detection device includes a detection body that is supported by the door and detects the presence of the foreign substance by moving in a predetermined direction when the foreign object comes into contact with the door.
The threshold is a first groove part with which a part of the door is engaged to guide the door in the opening and closing direction;
A second groove portion with which a part of the detection body engages so that the detection body can move with movement of the door in the opening and closing direction;
The second groove portion includes a guide portion that guides the detection body upward when a force along a direction orthogonal to the door opening / closing direction is applied to the detection body during the door closing operation. ,
The detection unit detects that a force along a direction orthogonal to the door opening / closing direction is applied by guiding the detection body upward by the guide unit.
Elevator door opening and closing device.   The elevator door opening and closing device according to claim 1, wherein the guide portion has an inclined surface that is in contact with the detection body and is inclined so as to guide the detection body upward. The said detection body is provided with the engaging part engaged with the said 2nd groove part, and the said engaging part is comprised as a taper-shaped protrusion part so that it may guide to the said inclined surface. Elevator door opening and closing device.

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