JP6715735B2 - Opening and closing device - Google Patents

Description

The present invention relates to an opening/closing device, such as a blind device and a shutter device, which is arranged in an opening such as a window or an entrance of a building and is used to open and close the opening.

An opening/closing device such as a blind device and a shutter device is, for example, a frame body arranged in an opening of a building such as a window, a plurality of blades juxtaposed to each other in an opening surrounded by the frame body, Hanging mechanism for suspending the uppermost blade of the blades, a link mechanism for connecting the plurality of blades to each other and folding, and raising and lowering the lowermost blade of the plurality of blades. And an elevating mechanism for elevating the plurality of blades.

JP-A-2015-68020

By the way, the blade is raised in the opening by the increasing reaction force from the reaction force generating mechanism, and the reaction force assists the manual operation force by the operator, making it difficult for the operator to manually operate. Patent Document 1 describes an opening opening/closing device that can solve the above problem. In such an opening opening/closing device, the amount of lifting and lowering of a plurality of blades that open and close the opening and the amount of travel of the chain of the reaction force generation mechanism are There is a one-to-one correspondence, and if the relationship between the mass of each blade and the reaction force generated by the reaction force generating mechanism deviates depending on the case, there is a risk that the blade may be unintentionally moved up and down.

The present invention has been made in view of the above points, and an object of the present invention is to solve the difficulty of the opening/closing operation of an opening by an operator and to prevent the blade from moving up and down. It is an object of the present invention to provide an opening opening/closing device that can easily and appropriately set the increase/decrease in the magnitude of force, while avoiding unintentional lifting of the blade.

The opening opening/closing device according to the present invention is arranged in an opening of a building and has a frame body having a pair of vertical frames, and the opening portion surrounded by the frame bodies is vertically juxtaposed to each other and has an opening portion. A plurality of blades that open and close, a connecting mechanism that mutually connects the blades of the plurality of blades that are adjacent to each other in the vertical direction, and a number of blades that increase according to the change in the number of blades that are raised in the opening and It is equipped with a reaction force generation mechanism that generates a reaction force having a direction opposite to the direction of the load of the blade, and an elevating mechanism that elevates and lowers the plurality of blades when opening and closing the opening. At least, the reaction force is generated by the reaction force increasing from the reaction force generation mechanism. The reaction force generation mechanism includes a flexible and long weight to generate the reaction force. The mechanism includes a flexible elongated body, a traveling mechanism for traveling the elongated body, and a transmission mechanism for transmitting the traveling of the elongated body to the blades. It is provided with a rotating body that is wound around and is rotated as the long body travels, and a rotating force applying mechanism that applies a rotating force to the rotating shaft to which the rotating body is fixed to rotate the rotating body. The rotating force applying mechanism is connected to the winding body fixed to the rotating shaft, and is connected to the winding body at one end so as to be fed out from the winding body by the rotation of the rotating shaft when the blade is raised, while at the other end. The long weight has a string-like body connected to one end thereof, and when the string-like body is unwound from the winding body, the long weight has the other end of the pair of vertical frames. The reaction force generated by the reaction force generation mechanism is increased by falling inside any of the above.

According to the opening opening/closing device of the present invention, the raising of the blades in the opening is performed at least by the increasing reaction force from the reaction force generating mechanism, and the rotating force applying mechanism is provided on the rotating shaft. The fixed winding body is connected to the winding body at one end so as to be fed out from the winding body by the rotation of the rotating shaft when the blade is lifted, while the other end is connected to one end of the long weight. When the string-shaped body is unwound from the winding body, the long weight has the other end that is lowered inside one of the pair of vertical frames. Since the reaction force generated by the reaction force generation mechanism is increased, the diameter of the rotating body and the winding diameter of the winding body are set as desired to obtain an appropriate increase rate of the reaction force. As a result, the reaction force can assist the manual operation force by the operator, and as a result, the difficulty of the manual operation by the operator can be eliminated.

Another opening opening/closing device according to the present invention is a frame body which is arranged in an opening of a building and has a pair of vertical frames, and an opening surrounded by the frame bodies, which is arranged side by side in the vertical direction and has an opening. A plurality of blades for opening and closing the portion, a connecting mechanism for connecting the blades of the plurality of blades that are adjacent to each other in the vertical direction to each other, and the number of blades that is increased in the opening and increases according to the change in the number of openings. And a lifting mechanism that raises and lowers a plurality of blades when opening and closing the opening, and a reaction force generating mechanism that generates a reaction force having a direction opposite to the direction of the load of the blade in the opening. The ascending is performed at least by the increasing reaction force from the reaction force generating mechanism, and the reaction force generating mechanism is provided with a flexible and long weight that generates a reaction force. The elevating mechanism includes a flexible elongated body, a traveling mechanism for traveling the elongated body, and a transmission mechanism for transmitting traveling of the elongated body to the blades. Rotating the first rotating body by applying a rotational force to the first rotating body that is wound around the body and is rotated as the long body travels, and the rotating shaft to which the first rotating body is fixed. The rotating force applying mechanism is provided with the rotating force applying mechanism, and the rotating force applying mechanism is fixed to the screw gear fixed to the rotating shaft, the helical gear meshing with the screw gear, and the shaft of the helical gear. A second rotary body and a flexible string-like body that is wrapped around the second rotary body and that is connected at one end to one end of a long weight. This string-shaped body, which is run by the rotation of the rotating body, causes the running of a long weight connected to one end thereof, and the long weight has a pair of vertical ends at the other end. The reaction force generated by the reaction force generation mechanism is increased by descending inside one of the frames.

According to another opening opening/closing device of the present invention, the blades in the opening are lifted at least by the increasing reaction force from the reaction force generating mechanism, and the rotating force applying mechanism is provided. The threaded gear that is fixed to the rotating shaft and the helical gear that meshes with the screw gear are provided, and the string-shaped body that travels in the rotation of the second rotating body is connected to one end thereof. The long weight is designed to cause the traveling of the scale weight, and the other end of the long scale weight falls inside one of the pair of vertical frames, so that the reaction force generated by the reaction force generation mechanism is generated. Since the force is increased, the rotation ratio between the screw gear and the bevel gear can be set to a desired value to obtain an appropriate rate of increase in the reaction force. As a result of being able to assist the force, the difficulty of manual operation by the operator can be eliminated, and the rotation of the bevel gear due to the reaction force generated by the reaction force generation mechanism can be blocked by the screw gear, so that the unintentional blade Up and down can be avoided.

For example, the opening closed by a plurality of blades is moved upward from the lowest blade, the upper blades are superposed on the lowest blade one after another, and the opening is configured to be opened. In either case, the opened openings are raised from the uppermost blade in advance, and the lowermost blades are successively lifted by the uppermost blade, thereby closing the opening. Also, by making the rate of increase of the reaction force generated by such a reaction force generation mechanism equal to the rate of increase of the load of the blade to be lifted and the member to be lifted accompanying this blade to be lifted, Even if the number of blades to be raised during opening and closing increases, the opening can be opened and closed with a substantially constant manual operating force without increasing the manual operating force of the operator, and the difficulty of manual operation by the operator can be eliminated. In addition, the increase rate of the reaction force generated by the reaction force generating mechanism is set to be larger than the increase rate of the load of the blade to be lifted and the member to be lifted accompanying the blade to be lifted. By this, the opening closed by a plurality of blades is raised from the lowest blade in advance, and the upper blades are superposed on the lowest blade one after another, thereby opening the opening. In this case, when an instantaneous operating force is applied to the lowermost blade from the outside to open the opening in the closed state of the opening, the blades are automatically raised one after another from the lowest blade. On the other hand, when it is configured to raise the opened openings in advance from the uppermost blade and lift the lower blades one after another at the uppermost blade, thereby closing the opening. In addition, when an instantaneous operation force is applied to the uppermost blade from the outside to close the opening in the open state of the opening, the blades can be automatically raised from the uppermost blade one after another. In any case, the opening and closing of the opening can be automatically performed regardless of the manual operation. In the present invention, the reaction force of the reaction force generation mechanism may be generated during the rising of the blade, and the string-like body is a synthetic resin or metal single wire or twisted wire, preferably a steel rope. Other lines or narrow strips may be used as long as they have durability and flexibility.

In the present invention, the flexible and long weights can generate a reaction force that increases or decreases in response to an increase or decrease in the load of the blades according to the number of blades that are moved up and down, for example, is connected to each other. The weight element may be a chain element, a cylindrical body, or the like. Such weight elements may have the same mass as each other, but may have different masses, when using a plurality of weight elements having different masses, In a weight element row composed of a plurality of weight elements connected to each other, weight elements whose mass sequentially increases from one end to the other end may be arranged.

In the present invention, of the plurality of blades in the opening, the lowermost blade in the vertical direction is raised first to open the opening, while the lowermost blade is lowered first to open the opening. Even if it closes, instead of this, the uppermost blade in the vertical direction of the plurality of blades in the opening is lifted in advance to close the opening, while the uppermost blade is closed. The opening may be opened by lowering it in advance.

In another example of the present invention, a plurality of blades in the opening are simultaneously moved up and down to open and close the opening. In such an example, a rotatable winding member may be further provided. Often, in the example including the winding member, the plurality of blades in the opening portion are adapted to be sequentially wound from the uppermost blade to the winding member when the opening portion is closed, while The blade wound on the member may be unrolled from the winding member when the opening is opened, and the reaction force generation mechanism may be configured to increase the number of blades wound on the winding member. It may be configured to generate an increasing reaction force.

In the example of the opening/closing device of the present invention in which a plurality of blades in the opening are simultaneously moved up and down to open/close the opening, the reaction force generating mechanism is a flexible, long-running movable member. A weight, a rotatable body around which the weight is wound so that it can be rotated by the traveling of the weight, and one hanging part that hangs the rise of the blades in the opening from the body of the weight. In order to be transmitted to the blade, the one hanging part may be provided with a connecting mechanism for connecting the blades in the opening, and in this case, the connecting mechanism may be the lowest blade of the plurality of blades in the opening. One end of the hanging part may be connected to the rotating body, and the other hanging part that hangs from the rotating body in the dead weight hangs from the rotating body in the dead weight when the opening is completely closed. It may have a mass equal to or greater than the mass (weight) of one hanging part, and furthermore, one end of the other hanging part hanging from the rotating body in the weight is a free end. May be.

The opening opening/closing device of the present invention is a shutter device or a blind device. In the case of a shutter device, the opening opening/closing device is arranged in an opening such as an entrance of a building, and in the case of a blind device, it is arranged in an opening such as a window of a building. Good.

According to the present invention, it is possible to eliminate the difficulty of the opening/closing operation of the opening by the operator, and it is possible to easily increase or decrease the magnitude of the reaction force with respect to the lifting amount of the blade, which is not intended. It is possible to provide an opening opening/closing device that can avoid raising and lowering of a blade.

FIG. 1 is a perspective explanatory view of an example of a preferred embodiment of the present invention. FIG. 2 is a side cross-sectional explanatory view of a part of the example shown in FIG. FIG. 3 is a side cross-sectional explanatory view of a part of the example shown in FIG. FIG. 4 is a partial plan cross-sectional explanatory view shown in FIG. FIG. 5 is a front cross-sectional explanatory view of a part of the example shown in FIG. 1. FIG. 6 is an enlarged perspective explanatory view of a part of the example shown in FIG. 1. FIG. 7 is an enlarged side cross-sectional explanatory view of a part of the example shown in FIG. 1. FIG. 8 is an enlarged side cross-sectional explanatory view of a part of the example shown in FIG. FIG. 9 is an explanatory diagram of the tilt mechanism and the suspension mechanism of the example shown in FIG. FIG. 10 is an enlarged side cross-sectional explanatory view of a part of the example shown in FIG. 1. FIG. 11 is an enlarged side cross-sectional explanatory view of a part of the example shown in FIG. 1. FIG. 12 is an enlarged front cross-sectional explanatory view of a part of the example shown in FIG. 1. FIG. 13 is an exploded perspective view of a part of the example shown in FIG. FIG. 14 is an enlarged side view of a part of the lifting mechanism of the example shown in FIG. FIG. 15 is an enlarged side view of a part of the lifting mechanism of the example shown in FIG. FIG. 16 is an enlarged front explanatory view of a part of the lifting mechanism of the example shown in FIG. FIG. 17 is an operation explanatory view of a part of the lifting mechanism of the example shown in FIG. FIG. 18 is an operation explanatory diagram of the tilt mechanism shown in FIG. 9. FIG. 19 is an operation explanatory diagram of the tilt mechanism shown in FIG. 9. FIG. 20 is an operation explanatory diagram of the tilt mechanism shown in FIG. 9. FIG. 21 is an operation explanatory view of the lifting mechanism of the example shown in FIG. FIG. 22 is an operation explanatory diagram of the example shown in FIG. FIG. 23 is an operation explanatory diagram of the example shown in FIG. FIG. 24 is a perspective explanatory view of another example of the preferred embodiment of the present invention.

Next, embodiments of the present invention will be described in more detail based on the preferred specific examples shown in the drawings. The present invention is not limited to these specific examples.

1 to 16, a blind device 1 of the present example, which is an example of an opening opening/closing device, is provided with a frame body 3 having a pair of vertical frames 15 and 16 arranged in an opening of a building such as a window or an entrance. A plurality of blades 4 arranged side by side in the vertical direction V in the opening 2 surrounded by the frame body 3 and opening and closing the opening 2, and a blade 4 among the plurality of blades 4 that is adjacent in the vertical direction V A link mechanism 5 as a connecting mechanism for connecting the two to each other, and a suspending mechanism 7 for suspending the uppermost blade 6 of the plurality of blades 4 connected by the link mechanism 5 from the frame 3 and the link mechanism 5 In order to open and close the opening 2 by the plurality of blades 4 connected by, the blades 4 are raised from the lowest blade 8 among the plurality of blades 4 and lowered from the lowest blade 8 to open the plurality of blades 4. The elevating mechanism 9 that elevates and lowers when opening and closing the part 2, and the opening and closing part 2 that increases and decreases in accordance with the increase and decrease of the load of the blades 4 in the opening part 2 according to the number of the blades 4 that are lifted and lowered by the elevating mechanism 9 in the opening part 2. A reaction force generation mechanism 10 that applies a reaction force in the direction opposite to the load direction of the blades 4 to the elevating mechanism 9, and a tilt mechanism 11 that tilts the plurality of blades 4 when the elevating mechanism 9 elevates the plurality of blades 4. It is equipped with.

The frame body 3 includes, in addition to the vertical frames 15 and 16 juxtaposed to each other, an upper frame 17 arranged to bridge the upper parts of the vertical frames 15 and 16 to cover the upper part thereof, and a lower part of the vertical frames 15 and 16. And a lower frame 19 arranged so as to bridge.

Each of the vertical frame 15 and the vertical frame 16 formed similarly to the vertical frame 15 includes an outer side wall part 21, an inner side wall part 22 arranged to face the outer side wall part 21, an outer side wall part 21 and an inner side wall part 21. The outer side wall part 21 is integrally formed with a front wall part 23 and a rear wall part 24 that bridge the part 22 and face each other, and the outer side wall part 21 and the side wall plate part 25. And a pair of holding wall portions 29 and 30 that are integrally formed with each other and that define two holding grooves 26 and 27 that extend in the vertical direction V, and that extend in the vertical direction V and cooperate with the rear wall portion 24 to guide them. The partition wall portion 31 defining the space 28 is integrally provided, and the inner side wall portion 22 of each of the vertical frames 15 and 16 is provided with a slit 32 extending in the vertical direction V.

The upper frame 17 includes a roof portion 36 integrally having a rear plate portion 35, a pair of side plate portions 37 attached to the roof portion 36 and the outer side wall portions 21 of the vertical frames 15 and 16, and a pair of side plate portions. A front wall portion 38 is bridged from 37 and is hung from the front portion of the roof portion 36.

Each of the blades 4 includes a blade body 41 and a mounting tool 43 for mounting an end portion 42 of the blade body 41 in the longitudinal direction to the link mechanism 5, and each mounting tool 43 has a corresponding blade body 41 at one end. Of the vertical frame 15 and 16 is fixed to the end 42 of the vertical frame 15 through the slit 32 at the other end.

The link mechanism 5 includes a plurality of leading edge link members 51 that are rotatably connected to each other via a shaft member 50 and are foldable, and rotatably connected to each other via a shaft member 52 to be foldable. A plurality of trailing edge link members 53, upper end portions of the uppermost leading edge link member 51 and the trailing edge link member 53, and lower end portions of the lowermost leading edge link member 51 and the trailing edge link member 53, respectively. Uppermost and lowermost lateral members 55 rotatably connected via 54, and rotatably connected to every other shaft members 50 and 52 on the leading edge link member 51 side and the trailing edge link member 53 side, respectively. The lateral members 55, which are fixed to each other at the other end of the corresponding fixtures 43, which are fixed to the substantially central portion through the slits 32 and protrude into the vertical frame 15, rotate relative to each other via the shaft members 50 and 52. In order to determine the folding direction of each of the plurality of leading edge link members 51 and trailing edge link members 53 that are freely connected, every other leading edge link member 51 and trailing edge link member 53 are integrally formed. The bent portion 56 is formed.

The leading edge link members 51, which are rotatably coupled to each other by the shaft members 50 to which the lateral members 55 are not coupled and are adjacent to each other, are arranged such that when the lowermost leading edge link members 51 are raised, the shaft members 50 are rear walls. The folded edges are regulated by the bent portion 56 so as to be directed toward the portion 24, and similarly, the lateral members 55 are rotatably connected to each other by the shaft member 52 which is not connected and the trailing edges adjacent to each other. The link member 53 is configured such that when the lowermost trailing edge link member 53 is raised, the shaft member 52 is restricted by the bent portion 56 so as to be directed toward the front wall portion 23 and is folded. The members 51 and the trailing edge link members 53 are arranged alternately in the vertical direction V.

The suspension mechanism 7 includes a suspension plate 62 fixed to the swingable member 61 of the tilt mechanism 11 at the upper portion of the vertical frame 15, and a shaft member 64 at one end of one arm portion 63 of the suspension plate 62 at one end. A wire, a rope rotatably connected to the shaft member 54 at the upper end of the uppermost leading edge link member 51, which is one end 65 of the uppermost link mechanism 5 at the other end. A flexible cord-like body 66 such as a band is rotatably connected at one end to a shaft member 68 at the tip of the other arm portion 67 of the suspension plate 62, and at the other end, the other of the uppermost link mechanism 5. A flexible cord-like body 70 such as a wire, a rope, or a belt rotatably connected to the shaft member 54 at the upper end of the uppermost trailing edge link member 53 which becomes the end 69 of the The swingable member 61 is swingably (rotatably) attached to a rotation shaft 82 of the lifting mechanism 9, and the rotation shaft 82 is a bearing plate attached to each of the outer side wall portions 21 of the vertical frames 15 and 16. 81 is rotatably supported at both ends thereof, and thus, the hanging mechanism 7 causes the uppermost blade 6 of the plurality of blades 4 connected by the link mechanism 5 to move with the cord-like bodies 66 and 70 and swing. The flexible member 61, the rotary shaft 82, and the bearing plate 81 are hung from the frame body 3.

The elevating mechanism 9 has both ends 71 and 72 on both sides and an endless chain 73 as a flexible elongated body which is held in an inflexible state, and the chain 73 in one direction A and one direction. A traveling mechanism 74 for traveling in the other direction B opposite to A and a transmission mechanism 75 for transmitting traveling in the directions A and B of the one end 71 of the chain 73 to the lowermost blade 8.

The traveling mechanism 74 rotates the sprocket wheel 76 by applying a rotational force to the sprocket wheel 76 serving as a rotating body that rotates the chain 73 in the directions A and B while the chain 73 is wound and rotates. The sprocket wheel 76 is fixed to the rotating shaft 82.

The rotating force imparting mechanism 77 has a take-up wheel 83 as a take-up body fixed to the rotary shaft 82, and a take-up wheel 83 at one end so that the take-up wheel 83 is fed out by the rotation of the rotary shaft 82 when the blades 4 are raised. The steel rope 84, which is a string-like body connected to 83, and the deflection pulley mechanism 85 that deflects the traveling direction of the steel rope 84 are provided. The deflection pulley mechanism 85 is a pair of bearings supported by the mounting plate 201. A member 202, a rotary shaft 203 rotatably supported by the pair of bearing members 202, and a pulley 204 rotatably supported by the rotary shaft 203 between the pair of bearing members 202 and around which a steel rope 84 is wound. The mounting plate 201 is mounted on the upper end of the inner side wall 22 of the vertical frame 15.

The chain 73 hangs down from the sprocket wheel 76 and is partially movably arranged in the holding groove 26 in the directions A and B at the one hanging part 86 having one end 71. In the other hanging part 87 having a part, the part is movably arranged in the holding groove 27 in the directions A and B, and in the hanging part 88 hung on the sprocket wheel 76, the holding member attached to the bearing plate 81. 89 is movably arranged in a holding passage 90 between the sprocket wheel 76 and the sprocket wheel 76 in the directions A and B, and the holding grooves 26 and 27, the holding walls 29 and 30 forming the holding passage 90, and the holding member 89. Therefore, the bending of the chain 73 is prevented, and thus the chain 73 is held in a non-flexed state by the holding wall portions 29 and 30 and the holding member 89.

The transmission mechanism 75 includes a traveling member 91 connected to one end 71 of the chain 73 so as to travel in the same directions A and B as the chain 73 travels in the directions A and B, and a lowermost lateral member of the lowermost blade 8. At one end 93, a movable body 92 that is connected through the member 55 and the attachment 43 and movable in the directions A and B and a rotation in the R1 direction that allows the traveling member 91 to descend relative to the movable body 92 are generated. A rotating arm member 95, which is rotatably and linearly connected to the traveling member 91 and is rotatably connected to the movable body 92 at the other end 94, and the descent of the traveling member 91 with respect to the movable body 92 is stopped. Therefore, a torsion spring 96 is provided as an elastic imparting member that imparts an elastic rotational force in the R2 direction against the rotation of the rotating arm member 95 in the R1 direction to the rotational arm member 95.

The traveling member 91 is arranged in the holding groove 26 and fitted into the holding wall portion 29 so as to be movable in the directions A and B similarly to the chain 73, and at the upper end portion at one end 71 of the chain 73, The main body 100 is connected through a connector 98 having a connecting pin 97 and a fastener 99, and a pin 102 fixed to the lower end of the main body 100 and having an enlarged head 101. There is.

The movable body 92 is supported by the frame body 3 so as to be linearly movable in the directions A and B, and the linearly movable member 103 to which the other end 94 of the rotary arm member 95 is rotatably coupled, and the lowermost blade. 8 and a swingable member 105 that is coupled to the linearly movable member 103 so as to be swingable in the R3 direction and the R4 direction via a shaft member 104, and is directly movable at one end. A coil spring 106, which is an elastic body, is connected to the free member 103 and is connected to the swingable member 105 at the other end.

The linearly movable member 103 is mounted between the holding wall portions 29 and 30 and extends in the vertical direction V, and the rolling member that is mounted on the upper portion of the body 111 and is in rolling contact with the holding wall portion 30. A moving roller 112, a rolling roller 113 attached to the lower part of the main body 111 and in contact with the side wall plate portion 25 so as to be able to roll, and a rotary arm provided on the main body 111 between the rolling rollers 112 and 113. The other end 94 of the member 95 is formed in the main body 111 above the rotary arm member 95 so as to regulate the rotation of the rotary arm member 95 in the R2 direction of a predetermined amount or more by contact with the pin 114 rotatably mounted. A contact portion 115, a support body 118 fixed to the lower portion of the main body 111 via a screw 117 and supporting the swingable member 105 swingably, and a rotation arm member 95 in the R1 direction at a predetermined amount or more. A contact portion 116 formed on a support body 118 is provided below the rotation arm member 95 so as to define rotation by contact, and the support body 118 is provided with a shaft member 104 and a slit 121. A pin 119 is provided.

The swingable member 105 is integrally formed with the main body 122 and a main body 122 having an arcuate slit 121 in which the end of the pin 119 is arranged and the other end of the coil spring 106 is connected. And a folded-back portion 123 that is folded back together.

The swingable member 105 is swingably attached to the support 118 of the linearly movable member 103 via the shaft member 104 in the main body 122, and the lowest leading edge link member 51 at one end of the main body 122. Is rotatably connected to the lower end of the lowermost horizontal member 55 and one end of the lowermost lateral member 55 via the shaft member 54, and the lower end of the lowermost trailing edge link member 53 and the lowermost lateral member at one end of the folded-back portion 123. The other end of the member 55 is rotatably connected via a shaft member 54.

The coil spring 106 rotates the swingable member 105 about the shaft member 104 fixed to the support body 118 to move the swingable member 105 to the initial swing position, that is, when the blades 4 are shown in FIG. The swingable member 105 is elastically pulled so as to be set to a position rotated in the R3 direction in the horizontal state as shown in FIGS. 5 and 6 without rotating in the R4 direction in the vertical state. The swing (rotation) of the swingable member 105 around 104 is guided by the movement of the pin 119 along the slit 121, and the swing (rotation) of the swingable member 105 is performed. The range is defined by both ends of the slit 121.

A long hole 125 into which the pin 102 is rotatably and linearly movable along the longitudinal direction of the rotary arm member 95 is formed at the wide end 93 of the rotary arm member 95. The end portion 126 of the elongated hole 125 located on the other end 94 side is formed with an enlarging hole portion 127 into which the enlarging head 101 of the pin 102 can be inserted/extracted, and the other end 94 of the rotating arm member 95 includes the pin 114. Is rotatably connected in the R1 and R2 directions.

The rotating arm member 95 moves in the elongated hole 125 within a range in which the pin 102 of the traveling member 91 does not reach the large hole portion 127 from the one end 93 side to the other end 94 side of the rotating arm member 95 in the rotation in the R1 direction. On the other hand, in the rotation in the R2 direction, the pin 102 of the traveling member 91 is disposed on the linearly movable member 103 so as to move in the elongated hole 125 from the other end 94 side of the rotating arm member 95 toward the one end 93 side. There is.

The torsion spring 96 wound around the pin 114 is locked to the rotary arm member 95 at one end and to the linearly movable member 103 at the other end, and the torsion spring 96 is in the R1 direction of the rotary arm member 95. It is arranged so as to apply an elastic R2 direction rotational force against the rotation of the rotary arm member 95 to the rotary arm member 95.

The transmission mechanism 75 may include a stopper (not shown) attached to the frame body 3 so as to contact the lower portion of the linearly movable member 103 when the opening 2 is closed.

In the transmission mechanism 75 that connects the one end 71 of the hanging part 86 to the lowermost blade 8, the lowermost blade 8 collides with a foreign object due to the lowering of the lowermost blade 8 by traveling in the downward direction B of the hanging part 86, for example, a person. When the lowermost blade 8 cannot descend due to collision with the movable member 91, the traveling member 91 is lowered with respect to the movable body 92. At this time, the rotary arm member 95 moves from the position shown in FIG. 13 to the position shown in FIG. Since the elastic member rotates in the R1 direction against the elastic force of the torsion spring 96, the downward movement of the traveling member 91 with respect to the movable body 92 is stopped by the elastically increasing R2 rotational force of the torsion spring 96. Therefore, the transmission mechanism 75 resists the elastic force of the torsion spring 96 due to the relative displacement of the movable body 92 with respect to the traveling member 91 in the vertical direction V when an abnormality that prevents the lowermost blade 8 from descending occurs. The lowering of the lowermost blade 8 is elastically blocked by the rotation of the rotary arm member 95. The contact portion 116 contacts the rotating arm member 95 to forcibly stop the rotation when the rotating arm member 95 rotates in the R1 direction by a predetermined amount or more, and thus the traveling member 91 is movable. The lowering of the body 92 is forcibly stopped. Further, in the transmission mechanism 75, even though the opening 2 is completely closed and the stopper comes into contact with the lower portion of the linearly movable member 103, the operation of the chain 73 is not immediately stopped and the chain 73 is slightly moved downward A. Even when the vehicle further travels, the rotating arm member 95 is rotated and stopped in the same manner as described above. In other words, it is rotatably and linearly movable to the one end 71 of the chain 73 via the traveling member 91. The connected rotating arm member 95 itself rotates about the pin 114 against the elastic force of the torsion spring 96 and moves linearly with respect to the traveling member 91, so that the movable body 92 is not further moved downward. Therefore, there is no inconvenience that the fully extended link mechanism 5 is further extended, or the completely closed blade 4 is further tilted, and damage to the link mechanism 5 and the blade 4 is avoided. You can

In the state where the transmission mechanism 75 is arranged in the frame body 3, the enlarged head portion 101 of the pin 102 is not arranged in the enlarged hole portion 127 of the long hole 125, so that the rotating arm member 95 is a traveling member. In the state where the traveling member 91 and the movable body 92 of the transmission mechanism 75 are taken out of the frame body 3 without accidentally dropping from the 91, the mutual position of the traveling member 91 and the movable body 92 can be freely changed. Therefore, the enlarged head 101 of the pin 102 can be easily inserted and removed from the enlarged hole 127 of the elongated hole 125.

The reaction force generation mechanism 10 includes a flexible and long weight 131 that generates a reaction force, and a weight 131 that supports the weight 131 in the upper frame 17 and between the vertical frames 15 and 16. The weight 131 includes a plurality of column-shaped weight elements 133 arranged in two rows in the horizontal direction H and having the same weight. And a shaft member 134 that rotatably connects a pair of weight elements 133 adjacent to each other in a direction orthogonal to the horizontal direction H, and two weight element rows 135 and 136 composed of a plurality of weight elements 133. A long connecting body 137 composed of a plurality of connecting members which are connected to each other in the horizontal direction H so as to be flexible, and which are connected to each other via the shaft member 134. The guide support member 132 has the weight elements 133 in the upper frame 17 in contact with each other in a rollable manner, and has one end in the horizontal direction H on the inner side wall portion 22 of the vertical frame 15 in the horizontal direction H. At the other end, the bottom plate 138 attached to the inner side wall portion 22 of the vertical frame 16 and the weight element rows 135 and 136 formed integrally with the bottom plate 138 and in the upper frame 17 are orthogonal to the horizontal direction H. The bottom plate 138 and the pair of side plates 139 are provided in the vicinity of the vertical frame 16 in two rows of a plurality of weight elements 133 in the vicinity of the vertical frame 16. The weight element rows 135 and 136 are curved so as to be guided to the guide space 28 of the vertical frame 16, and one end 140 of the connecting body 137, which is one end of the long weight 131, is connected to the other end 141 of the steel rope 84. As shown in FIG. 23, when the opening 2 is completely closed by the plurality of blades 4, as shown in FIG. 3, in the horizontal direction H in the two weight element rows 135 and 136. One or several weight elements 133 having a weight corresponding to the weight of one blade 4 of the end portion on the side of the vertical frame 16 are arranged in the guide space 28 of the vertical frame 16, and the steel rope 84 When the weight 131 is unwound from the take-up vehicle 83, the other end 142 of the weight 131 arranged in the guide space 28 of the vertical frame 16 descends in the vertical direction V in the guide space 28 inside the vertical frame 16, The reaction force generated by the reaction force generation mechanism 10 is increased.

The load (weight) of the pair of weight elements 133 adjacent to each other in the direction orthogonal to the horizontal direction H increases each time the pair of weight elements 133 are accommodated in the guide space 28 or withdrawn from the guide space 28. The total load of the load of the blades 4, the load of the leading edge link member 51 and the trailing edge link member 53, the load of the lateral member 55 accompanying it, and the length of the hanging portion 86 and the hanging portion 86 of the chain 73 that increases or decreases. It is set in consideration of the load of the chain 73 corresponding to the difference.

The reaction force generating mechanism 10 causes the reaction force in the direction A opposite to the direction B of the load in the direction B applied to the one end 71 of the chain 73 based on the load of the weight 131 located in the guide space 28, the steel rope 84, The winding wheel 83, the rotary shaft 82, and the sprocket wheel 76 are applied to the chain 73.

The tilt mechanism 11 is provided on the rotary shaft 82 via the bearing 151 so as to be swingable (rotatable) about the rotary shaft 82 with respect to the rotary shaft 82, and the recess 152 and the projection 153 are provided. 9 and 18, the swingable member 61 has a projection 154 that is attached to the chain 73 and that fits into the recess 152 when traveling in the direction B of the chain 73 and the recess 155. As shown in FIG. 9, when the projection 154 is not fitted into the recess 152, the projection 153 is engaged with the recess 155 to inhibit the swing (rotation) of the swingable member 61 about the rotation shaft 82. While the rocking prohibition state shown in FIG. 19 is set, when the projection 154 is fitted into the recess 152, the projection 154 is rotated by the projection 154 to release the engagement of the recess 155 with the projection 153 and rock. A latch member 156 that is set in a swinging allowable state shown in FIG. 19 that allows swinging of the movable member 61, and an elastic force is applied to the latching member 156 so that the latching member 156 is set in a swinging prohibited state. And elastic means 157.

The swingable member 61 is disposed concentrically with the sprocket wheel 76, and the latch member 156 having a claw portion 161 (see FIG. 18) at one end is attached to the support plate 164 via the shaft member 163 at the other end 162. The support plate 164 is attached rotatably around the shaft member 163, the support plate 164 is attached to the upper end of the vertical frame 15 between the swingable member 61 and the sprocket wheel 76, and the elastic means 157 is attached at one end. It consists of a torsion coil spring that is locked to the support plate 164, locked to the latch member 156 at the other end, and wound around the shaft member 163 at the center to rotate the latch member 156 around the shaft member 163. An elastic force is applied to the latch member 156 so that the claw portion 161 is directed toward the recess 152.

When the tilt mechanism 11 travels in the direction B of the chain 73, as shown in FIG. 19, the protrusion 154 is fitted into the recess 152 to rotate the latch member 156 against the elastic force of the elastic means 157 to rotate the latch 156. The engagement with the location 155 is released, and by this release, the swingable member 61 is swung as shown in FIG. 20 with the movement of the protrusion 154, and the swinging member 61 is pulled upward by the swinging operation. The series of trailing edge link members 53 is raised relative to the series of leading edge link members 51 against the elastic force of the coil spring 106, while the series of leading edges is lowered via a string 66 that is lowered. A transverse member connected to the leading edge link member 51 and the trailing edge link member 53 so as to lower the link member 51 relative to the series of trailing edge link members 53 to close the opening 2 by each blade 4. 23, the blades 4 are synchronously tilted to a vertical state as shown in FIG. When the opening 2 is closed by the blades 4, the swingable member 105 is swung in the R4 direction from the position shown in FIG. 15 to the position shown in FIG.

The sprocket wheel 76 on the vertical frame 16 side, which is configured similarly to the sprocket wheel 76, is fixed to the rotary shaft 82 extending from the vertical frame 15 to the vertical frame 16. In the blind device 1, the lifting mechanism 9 and the tilt mechanism. 11, the vertical frame 16 side is configured similarly to the vertical frame 15 side.

In addition, in order to prevent unintentional or malicious removal of the completely closed state of the opening 2 by the plurality of blades 4, the lowermost blade 8 and the lower frame 19 are fixed in the completely closed state of the opening 2 and can be released. It is preferable to provide a hook.

In the blind device 1 described above, when the plurality of blades 4 are vertically tilted so as to close the opening 2 as shown in FIG. 23, the projection 154 provided on the chain 73 is arranged as shown in FIG. The protrusion 153 and the recess 155 are disengaged from each other in the recess 152, and the latch member 156 contacts the outer peripheral edge 165 of the swingable member 61 with respect to the swingable member 61. The rocking permissible state is maintained. In such a state, when the lowest blade 8 is manually lifted after releasing the hook that fixes the blade 8 and the lower frame 19, the chain 73 is lifted with the one end 71 of the chain 73 via the transmission mechanism 75. When the sprocket wheel 76 is rotated in the direction A while the chain 73 is traveling in the direction A, the protrusion 154 also rotates about the rotation shaft 82, and the rotation of the protrusion 154 causes the swingable member 61 to rotate in the same direction. By this rotation of the swingable member 61, the uppermost leading edge link member 51 and a series of lower leading edge link members 51 connected below the uppermost leading edge link member 51 via the string-like body 66. Is raised relative to the series of trailing edge link members 53, while the uppermost trailing edge link member 53 and the lower series of lowermost trailing edge link members 53 are connected via the string 70. As a result of the trailing edge link member 53 and the trailing edge link member 53 being assisted by the elastic force of the coil spring 106 and being lowered relative to the series of leading edge link members 51, the plurality of blades 4 are synchronously tilted and the blades 4 are tilted. When the plurality of blades 4 are brought into a substantially horizontal state as shown in FIG. 11, the swingable member 105 is swung in the R3 direction from the position shown in FIG. 21 to the position shown in FIG. ..

When the lowermost blade 8 is further lifted manually and the chain 73 travels in the direction A, the protrusion 154 starts to come out of the recess 152, and the protrusion 154 comes out of the recess 152, so that the latch member 156 is elastic. By the elastic force of the means 157, the shaft member 163 is rotated, and the projection 153 and the recess 155 are engaged with each other as shown in FIGS. 9 and 18, and the rotation of the swingable member 61 is blocked by this engagement. It The one end 71 of the chain 73 is lifted by continuing further traveling of the chain 73 in the direction A based on the further lifting of the lowermost blade 8 and is connected to the one end 71 of the chain 73 via the transmission mechanism 75. The lower leading edge link member 51 and the trailing edge link member 53 of the linked link mechanism 5 start to be folded, and by this folding, the plurality of blades 4 connected by the link mechanism 5 are sequentially arranged from below as shown in FIG. The blades 4 are overlapped with each other, and the plurality of blades 4 are all raised to be overlapped with each other, so that the opening 2 is opened.

The winding wheel 83 is also rotated by the rotation of the rotary shaft 82 accompanying the rotation of the sprocket wheel 76 due to the traveling of the chain 73 in the direction A, and the rotation of the winding wheel 83 causes the steel rope 84 wound on the winding wheel 83. Are two rows in which each weight element 133 is in rolling contact with the bottom plate 138 based on the load in the vertical direction V of one or several weight elements 133 that are previously arranged and hung in the guide space 28 of the vertical frame 16. Of the weight element rows 135 and 136 of the weight element element 133 extending in the horizontal direction H from the vertical frame element 15 toward the vertical frame element 16, and the weight element element 133 arranged in the guide space 28 of the vertical frame element 16 by the extension of the steel rope 84 and hanging down. The feeding force of the steel rope 84 from the winding wheel 83 increases due to the increase in the number of the winding wheels 83, and the increased feeding force of the steel rope 84 passes through the winding wheel 83, the rotating shaft 82 and the sprocket wheel 76 to the one end 72 of the chain 73. Is applied as a force in the direction A, and the added force in the direction A gradually increases at the opening of the opening 2, the blade 4, the leading edge link member 51, the trailing edge link member 53, and the lateral member 55. , Which acts as a reaction force against the load in the direction B, and this reaction force assists the traveling of the chain 73 in the direction A, and this reaction force causes a light manual operation force on the lowermost blade 8. The opening 2 can be opened. In addition, in the opening of the opening 2, the blades 4, the leading edge link member 51, the trailing edge link member 53, and the lateral member 55 are gradually increased in the guide space 28 of the vertical frame 16 with respect to the increasing rate of the load in the direction B. By increasing the feeding force of the steel rope 84 due to an increase in the number of weight elements 133 that are arranged and hang down, the opening 2 is automatically completely opened by only a light manual operation force for the lowermost blade 8. I will get it.

In the open state of the opening 2, when the lowermost blade 8 is manually operated so as to descend in the opposite direction to the above, the chain 73 travels in the direction B, and by this travel, the upper leading edge link member 51 and the trailing edge The link member 53 is sequentially unfolded and begins to expand, whereby the superposition of the plurality of blades 4 is sequentially released from the upper blade 4. When the link mechanism 5 is completely extended and the plurality of blades 4 are also released from the superposition, the projection 154 is fitted into the recess 152 through the guide wedge space 166 as shown in FIG. By this, the projection 154 rotates the latch member 156 against the elastic force of the elastic means 157 to release the engagement of the projection 153 with the recess 155, and by this release, the swingable member 61 rotates together with the movement of the projection 154. By this rotation, the trailing edge link member 53 is raised relative to the leading edge link member 51 via the string-like body 70 that is pulled in the upward direction A, and the string-like body 66 is lowered downward. The leading edge link member 51 is lowered relative to the trailing edge link member 53, the plurality of blades 4 are synchronously rotated, and the opening 2 is vertically tilted as shown in FIG. Are closed by the plurality of blades 4. In traveling in the direction B of the chain 73 when the opening 2 is closed by the plurality of blades 4, the steel rope 84 is wound around the winding wheel 83 by the reverse rotation of the rotation shaft 82, and the winding rope 83 of the steel rope 84 is wound up. The number of weight elements 133 that are arranged in the guide space 28 of the vertical frame 16 and hang down is reduced, so that the reaction force with respect to the descending force of the lowermost blade 8 depends on the running of the chain 73 in the direction B. Will gradually decrease. One or several pieces arranged in the guide space 28 so that the closed state of the opening 2 by the series of plural blades 4 is a reaction force that does not cause the chain 73 to travel in the direction A in the closed state of the opening 2. It is maintained by setting the load of the weight element 133. Thereafter, if necessary, the closed state of the opening 2 may be surely maintained by locking the hook that fixes the lowermost blade 8 and the lower frame 19.

The magnitude of the force in the direction B applied to the chain 73 due to the load of the blades 4, the leading edge link member 51, the trailing edge link member 53, and the lateral member 55 and the reaction force in the direction A applied to the chain 73 by the reaction force generation mechanism 10 are determined. With proper combination, a half-opening by the plurality of blades 4 of the opening 2 can be performed.

As described above, in the blind device 1 of the present example, the vertical movement of the lowermost blade 8 by the elevating mechanism 9 in the vertical direction V causes the reaction force applied from the reaction force generating mechanism 10 and the external force to the lowermost blade 8. The reaction force generation mechanism 10 is configured so that the reaction force generation mechanism 10 loads the plurality of weight elements 133 hanging in the guide space 28 of the vertical frame 16 in the two weight element rows 135 and 136. Is applied as a reaction force to the elevating mechanism 9, the elevating force applied to the elevating mechanism 9 even if the number of blades 4 that can be elevated in the opening of the plurality of blades 4 of the opening 2 increases or decreases. That is, the plurality of blades 4 of the opening 2 can be used to open the opening 2 with a substantially constant manual force without increasing or decreasing the manual force of the operator with respect to the lowermost blade 8, and the difficulty of manual operation by the operator can be eliminated. ..

In the blind device 1 of the above example, the rotational force imparting mechanism 77 includes the winding wheel 83, the steel rope 84, and the turning pulley mechanism 85. Instead of this, as shown in FIG. As a rotating body that is fixed to a screw gear (worm gear) 301, a bevel gear (worm wheel) 302 that meshes with the screw gear 301, and a shaft 303 of the bevel gear 302 and that is equivalent to the sprocket wheel 76. Of the sprocket wheel 304, and a flexible string that is engaged with the sprocket wheel 304 and wound around the sprocket wheel 304, and that is connected to one end 140 of the long connecting body 137 at one end 305 and to one end of the weight 131. 24 may be provided as a body, and in the rotational force imparting mechanism 77 shown in FIG. 24, the shaft 303 to which the helical gear 302 is fixed is a pair of mutually attached to the mounting plate 201. The sprocket wheel 304 is rotatably supported by the facing bearing plate 307, and the sprocket wheel 304 is rotatably accommodated in a box 309 having an opening 308 through which the no-bac chain 306 can be inserted and withdrawn. In this example, in addition to the bottom plate 138 and the pair of side plates 139 of the example shown in FIG. 1, the guide support member 132 includes the nobac chain 306 between the other end of the nobac chain 306 and the sprocket wheel 304. It further comprises another bottom plate 311 for guiding the movement in the horizontal direction H and another pair of side plates 312 integrally formed with the other bottom plate 311, and one end of the bottom plate 138 terminates in a box 309. On the other hand, the pair of side plates 139 is attached to the box 309 at one end thereof, and the other ends of the bottom plate 138 and the pair of side plates 139 are formed in the same manner as in the example shown in FIG. The side plate 312 is also attached to the box 309 at one end thereof, and one end of the bottom plate 311 is terminated at the box 309, while the bottom plate 311 is attached to the inner side wall portion 22 of the vertical frame 16 at the other end. In the no-bac chain 306, the no-bac chain 306 between the other end and the sprocket wheel 304 has the other end 142 of the weight 131 in a state where the opening 2 is completely opened by the plurality of blades 4. Is arranged in the upper frame 17 in contact with the upper surface of the bottom plate 311 with a length in the horizontal direction H so that the meshing between the sprocket wheel 304 and the no-back chain 306 is maintained even when the sprocket wheel is fully lowered. ..

Also in the rotational force imparting mechanism 77 shown in FIG. 24, the screw gear 301 is rotated by the rotation of the rotary shaft 82 accompanying the rotation of the sprocket wheel 76 caused by the traveling of the chain 73 in the direction A or B, and the rotation of the screw gear 301 causes the screw gear 301 to rotate. The helical gear 302 meshing with 301 is rotated, the rotation of the helical gear 302 rotates the sprocket wheel 304 via the shaft 303, and the rotation of the sprocket wheel 304 causes the chain 73 to travel in the direction A. While increasing the number of weight elements 133 arranged in the guide space 28 of the vertical frame 16 and hanging down, when traveling in the direction B of the chain 73, the weight element 133 arranged in the guide space 28 of the vertical frame 16 and hanging down. 24, the rotational force imparting mechanism 77 shown in FIG. 24 causes the vertical frame 16 in the two weight element rows 135 and 136 due to traveling of the chain 73 in the direction A or B. The load of the plurality of weight elements 133 hanging in the guide space 28 is applied as a reaction force to the rotary shaft 82 via the no-bac chain 306, the sprocket wheel 304, the shaft 303, the bevel gear 302 and the screw gear 301, and the chain. As a result of the sprocket wheel 76 being rotated during traveling in the direction A or B of 73, even if the number of blades 4 that can be raised and lowered in the opening of the plurality of blades 4 of the opening 2 increases or decreases, the lifting mechanism 9 It is possible to open the opening 2 by the plurality of blades 4 with a substantially constant manual force without increasing or decreasing the applied lifting force, that is, the manual force of the operator with respect to the lowermost blade 8, and to manually operate the operator. You can eliminate the difficulty.

Moreover, in the rotational force imparting mechanism 77 shown in FIG. 24, since the rotational force imparting mechanism 77 includes the screw gear 301 and the helical gear 302, the helical gear due to the reaction force generated by the reaction force generating mechanism 10 is included. Since the rotation of 302 can be prevented by the screw gear 301, it is possible to avoid unintentional elevation of the blade 4 due to only the reaction force generated by the reaction force generation mechanism 10.

In the blind device 1, the lowermost blade 8 in the vertical direction V of the plurality of blades 4 in the opening 2 is raised first to open the opening 2, while the lowermost blade 8 is preceded. Then, the opening 2 is closed to lower the opening 2. However, for example, as described in Japanese Patent Laid-Open No. 2011-132806, the lowest blade 8 of the plurality of blades 4 is attached to the frame 3. The blades 4 are connected and fixed to the lower frame 19, and in the opened state of the opening 2, the plurality of blades 4 are arranged below each other so as to overlap each other, and when the opening 2 is closed, they are overlapped with each other in the opening 2. Among the plurality of blades 4, the uppermost blade 6 is raised in the vertical direction V in advance, and the lowermost blade 4 that remains along with the linkage mechanism 5 is raised by the rising of the uppermost blade 6. While the opening 2 is closed by closing the opening 2, the uppermost blade 6 is moved down in advance when the opening 2 is opened, and the uppermost blade 6 is moved down by the lowering of the link mechanism 5 one after another. A blind device that lowers the lower blade 4 to open the opening 2 may be used. In such a blind device, one hanging portion 86 that hangs from the sprocket wheel 76 in the chain 73 is the above hanging device. It also serves as the function of the lowering mechanism 7.

Further, as the connecting mechanism, instead of the link mechanism 5 that connects the respective end portions 42 in the longitudinal direction of the blade main bodies 41 that are adjacent to each other in the vertical direction V and that includes the leading edge link member 51 and the trailing edge link member 53, etc. , A hinge configured to rotatably connect the upper and lower longitudinal edges of the blade main bodies 41 adjacent to each other in the vertical direction V and to specify the alternating folding directions (rotational directions) of the mutually connected blade main bodies 41. The opening/closing device may be a shutter device instead of the blind device 1.

In addition, instead of the transmission mechanism 75 including the rotating arm member 95 and the torsion spring 96, the one end 71 of the chain 73 is directly connected to the fixture 43 of the blade 8 at the lowermost position, and the one end 71 of the chain 73 is moved up and down. May be transmitted to the lowermost blade 8, and while the rotational force imparting mechanism 77 is provided on the vertical frame 16 side, the other end 142 side of the weight 131 is arranged in the guide space 28 of the vertical frame 15. You may do it.

In addition, a handle may be provided on the back surface of the lowermost blade 8 for the convenience of manually raising and lowering the lowermost blade 8.

DESCRIPTION OF SYMBOLS 1 Blind device 2 Opening part 3 Frame body 4, 6, 8 Blade 5 Link mechanism 7 Suspending mechanism 9 Elevating mechanism 10 Reaction force generating mechanism 11 Tilt mechanism 77 Rotating force applying mechanism 82 Rotating shaft 83 Winding wheel 84 Steel rope 85 Turning pulley Mechanism 131 Weight 132 Guide support member 133 Weight element 134 Shaft member 135, 136 Weight element row 137 Connection body 301 Screw gear 302 Bevel gear 303 Shaft 304 Sprocket wheel 305 One end 306 Novak chain

Claims (6)

A frame body that is arranged in the opening of the building and has a pair of vertical frames, a plurality of blades that are arranged side by side in the vertical direction at the opening surrounded by the frame body and that open and close the opening, and a plurality of these blades. Of the blades, which are adjacent to each other in the vertical direction, and a direction opposite to the direction of the load of the blades in the opening, which increases in accordance with the change in the number of blades lifted in the opening. It is equipped with a reaction force generation mechanism that generates a reaction force having a height and an elevating mechanism that elevates and lowers a plurality of blades when opening and closing the opening, and the blades rise in the opening at least from the reaction force generation mechanism. The reaction force generating mechanism includes a flexible and long weight that generates a reaction force, and the lifting mechanism has a flexible long length. The body, a traveling mechanism for traveling the elongated body, and a transmission mechanism for transmitting the traveling of the elongated body to the blades. The traveling mechanism includes the elongated body wound around and the elongated body. And a rotating force applying mechanism for applying a rotating force to the rotating shaft to which the rotating body is fixed to rotate the rotating body. One end is connected to the winding body fixed to the winding body and one end is connected to the winding body so as to be fed out from the winding body by the rotation of the rotating shaft when the blade is raised, while the other end is connected to one end of the long weight. When the string-shaped body is unwound from the winding body, the long weight has its other end descending inside one of the pair of vertical frames. The opening opening/closing device is configured to increase the reaction force generated by the reaction force generation mechanism. A frame body that is arranged in the opening of the building and has a pair of vertical frames, a plurality of blades that are arranged side by side in the vertical direction at the opening surrounded by the frame body and that open and close the opening, and a plurality of these blades. Of the blades, which are adjacent to each other in the vertical direction, and a direction opposite to the direction of the load of the blades in the opening, which increases in accordance with the change in the number of blades lifted in the opening. It is equipped with a reaction force generation mechanism that generates a reaction force having a height and an elevating mechanism that elevates and lowers a plurality of blades when opening and closing the opening, and the blades rise in the opening at least from the reaction force generation mechanism. The reaction force generating mechanism includes a flexible and long weight that generates a reaction force, and the lifting mechanism has a flexible long length. The body, a traveling mechanism for traveling the elongated body, and a transmission mechanism for transmitting the traveling of the elongated body to the blades. The traveling mechanism includes the elongated body wound around and the elongated body. And a rotating force applying mechanism that applies a rotating force to the rotating shaft to which the first rotating body is fixed to rotate the first rotating body. The rotating force applying mechanism includes a screw gear fixed to a rotating shaft, a helical gear meshing with the screw gear, a second rotating body fixed to the shaft of the helical gear, and a second rotating body. A flexible string-like body which is wound around the rotating body and is connected at one end to one end of a long weight, and which is run when the second rotating body rotates. The elongated body causes a long weight connected to one end thereof to run, and the long weight drops at the other end inside one of the pair of vertical frames. Thus, the opening opening/closing device configured to increase the reaction force generated by the reaction force generation mechanism. Among the plurality of blades in the opening, the uppermost blade in the up-down direction is raised first to close the opening, while the uppermost blade is lowered first to open the opening. The opening/closing device according to claim 1 or 2. Among the plurality of blades in the opening, the lowermost blade in the vertical direction is raised first to open the opening, while the lowermost blade is lowered first to close the opening. The opening/closing device according to claim 1 or 2. The opening/closing device according to any one of claims 1 to 4, wherein the opening/closing device is a blind device. The opening/closing device according to any one of claims 1 to 4, wherein the opening/closing device is a shutter device.

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