JP2007211411A - Anti-closing device for opening/closing unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anti-closing device for an overhead door, which can prevent a malfunction, associated with a change in the pulling direction of a pulling member, by using a simple structure. <P>SOLUTION: This anti-closing device for an opening/closing unit makes a movable engaging member 42 pulled against an urging force of an urging means 43 by the pulling member 33, so that the engaging member 42 can be kept on an anti-engagement-direction side. A correcting arm 44, which has a free end side undetachably engaged with the pulling member 33 so as to be rotated with the change of the pulling direction of the pulling member 33, is supported on the engaging member 42. The rotation of the correcting arm 44 is regulated so that a position of a point x of action of a pulling force by the pulling member 33 can be corrected to a position to rotate the engaging member 42 in the anti-engagement direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is provided in an opening / closing device such as an overhead door that opens and closes an opening / closing body that partitions a space while being pulled by a pulling member, and the opening / closing body closes unexpectedly when the tension of the pulling member decreases. The present invention relates to a closing prevention device for an opening / closing device that prevents operation.

  Conventionally, in this type of invention, as described in FIG. 3 of Patent Document 1, a fixing member (mounting portion 22) fixed to an opening / closing body (shutter body 34), and supported by the fixing member. A movable engaging member (stopper 23) that can rotate, and a biasing member (a spring not shown) that biases the movable engaging member to rotate in a direction in which the movable engaging member is engaged with the guide rail (37). For a building that opens and closes the opening / closing body (shutter body 34) while pulling the movable engagement member (stopper 23) by the pulling member (wire 35) so as to rotate in the anti-engagement direction. There is a shutter fall prevention device.

By the way, the above-described conventional fall prevention device is opened while the opening / closing body is pulled from above by a pulling member, and the opening / closing body is slid in a substantially horizontal direction against the pulling force of the pulling member and stored. 9, in a normal opening operation, the movable engagement member 123 is pulled by the pulling member 135 so that the blade 125 fixed to the movable engagement member 123 is removed from the guide rail 137 as shown in FIG. Since it is located in a separated state, the opening / closing body (not shown) can be moved in the opening direction together with the fall prevention device 100 while being assisted by the pulling force of the pulling member 135.
In addition, when the tension of the traction member 135 decreases due to the traction member 135 being cut or detached, or the mechanism that winds the traction member 135 is damaged and idles, the tension of the traction member 135 is applied. Since the urging force of the urging member 136 is won, the movable engagement member 123 is rotated in the direction opposite to the pulling direction as shown by a two-dot chain line in FIG. 9, and the blade 125 of the movable engagement member 123 is guided by the guide rail. Cut into 137. Therefore, it is possible to prevent the opening / closing body (not shown) integrated with the fall prevention device 100 from falling.

Further, in the above prior art, the description is omitted according to Patent Document 1, but the pulling member 135 is guided upward along the guide groove 123a of the movable engagement member 123. When the member 123 moves upward along the guide rail 137 and further moves in the horizontal direction, the pulling member 135 is disengaged from the guide groove 123 a of the movable engagement member 123. Therefore, even if the pulling direction of the pulling member 135 changes in the oblique direction shown in FIG. 9, the pulling force of the pulling member 135 rotates the movable engagement member 123 in the anti-engagement direction (clockwise in FIG. 9). The blade 125 is maintained in a state of being separated from the guide rail 137.
In the normal closing operation, the pulling member 135 detached from the guide groove 123a as described above is movablely engaged when the fall prevention device 100 moves in the closing direction along with the closing operation of the opening / closing body. The member 123 is re-engaged with the guide groove 123a of the member 123 to be in the original state.

However, according to the above prior art, during the closing operation of the opening / closing body, the pulling member 135 is inserted into the guide groove 123a as shown in FIG. When the re-engagement is not performed, the pulling member 135 pulls the movable engagement member 123 so as to rotate the engagement direction (counterclockwise in FIG. 10). May bite into the guide rail 137 and the movement of the fall prevention device 100 and the opening / closing body in the closing direction may stop.
JP 2003-56265 A (see FIG. 3)

  The present invention has been made in view of the above-described conventional circumstances, and a problem to be solved by the present invention is a closing prevention device for an opening / closing device that can prevent malfunction due to a change in the pulling direction of the pulling member with a simple structure. It is to provide.

  In order to solve the above-mentioned problem, the first invention is to open and close the opening / closing body by pulling it from the opening direction side while pulling it with a flexible pulling member, and to resist the pulling force of the pulling member. It is provided in an opening / closing device that is slid and housed in a direction intersecting the opening direction, and when the tension of the traction member decreases, the opening / closing body that closes is engaged with the immovable engaged portion to brake. In the closing prevention device for an opening / closing device as described above, a fixing member fixed to the opening / closing body, an engagement direction approaching and engaging the engaged portion, and an anti-engagement direction separating from the engaged portion A movable engagement member supported by the fixed member, and a biasing means for biasing the movable engagement member to rotate in the engagement direction. So that the movable engaging member resists the biasing force of the biasing means. An opening / closing device closing prevention device configured to maintain the movable engagement member in the anti-engagement direction side by being pulled by a pulling member, wherein the movable engagement member includes a pulling member in the pulling member. A correction arm having a free end that is detachably engaged with the traction member is supported so as to rotate with a change in direction. The rotation of the movable engagement member is restricted so as to be corrected to a position where the movable engagement member is rotated in the anti-engagement direction.

  Here, the closing prevention device according to the present invention is attached to an opening / closing device (particularly preferably an overhead door) that opens and closes the opening / closing body and stores the opening / closing body in a direction crossing the opening direction. A shutter device that winds and stores the opening / closing body, a panel shutter device, a door, a sliding door including a shutter, a window, and a roll screen. It is also possible to attach to an opening / closing device other than an overhead door, such as a blind, an awning device, a gate, a gate, or a sliding wall device.

  The opening / closing body includes an aspect in which a plurality of slats and pipes are continuously provided in the opening / closing direction, an aspect in which one or more panels, a sheet-like object, and a net-like object are provided in the opening / closing direction, or a slat. , A panel, a pipe, a sheet-like material, a net-like material, and the like can be appropriately combined.

  Further, the pulling member may be a flexible member that opens the closed opening / closing body while pulling from the opening direction side. The pulling member includes a wire, a string-like object, and a belt-like object. A chain member, a chain member, a spring and the like.

The engaged portion is an object to be engaged when the opening / closing body is engaged and braked via the closing prevention device, and is stationary relative to the opening / closing body that moves in the opening / closing direction. It is a part.
As a specific example of the engaged portion, a guide rail that guides the opening / closing body in the opening / closing direction and the storage direction, a column that supports the guide rail, and a casing that is an installation target of the opening / closing device including the closing prevention device Can be mentioned.
Further, the engaged portion may be a member other than the members (guide rails, columns, frames, etc.) provided along the opening / closing track of the opening / closing body.
In addition, in the configuration of “braking by engaging the opening / closing body that closes with the immovable engaged portion”, the opening / closing body that closes is engaged with the immovable engaged portion, A mode in which the closing operation is stopped, a mode in which the opening / closing body that performs the closing operation is brought into sliding contact with an immovable engaged portion, and the closing speed of the opening / closing body is slowed are included.

Moreover, the said fixing member should just be a member fixed with respect to the said opening-and-closing body, The concrete shape etc. are not limited.
The movable engagement member is a member that is supported so as to rotate relative to the fixed member, and the rotation direction of the movable engagement member approaches and engages with the engaged portion. It is comprised so that it may become bidirectional | two-way with the anti-engagement direction spaced apart from an engaging part.
The movable engagement member includes, for example, a mode in which the engagement direction is a rotation direction along the opening / closing body opening direction, and the anti-engagement direction is a rotation direction along the opening / closing body closing direction, and the engagement Both the direction is a rotation direction along the opening / closing body closing direction, and the anti-engagement direction is a rotation direction along the opening / closing body opening direction.

The urging means may be any member that urges the movable engagement member to rotate in the engagement direction. The urging means includes a spring, a spring, rubber, or an elastic synthetic resin. Including elastic bodies such as materials.
Further, the urging means includes a configuration for rotating the movable engagement member in the engagement direction by its own weight or weight.

In addition, “change in the pulling direction of the pulling member” means that the pulling direction of the pulling member changes in accordance with the change in the sliding direction of the opening / closing body.
That is, for example, when the opening / closing body in the closed state slides in the opening direction and further slides in a direction crossing the opening direction, the opening / closing device closure fixed to the opening / closing body with the change in the sliding direction The direction of movement of the prevention device also changes. Therefore, the pulling direction of the pulling member changes.

Further, the correction arm is a member supported by the movable engagement member so as to rotate in a state where the free end side is detachably engaged with the pulling member.
In addition, in the configuration that “the free end side is detachably engaged with the traction member”, for example, a mode in which a middle portion of the traction member is inserted through a through hole on the free end side of the correction arm, The aspect etc. which have fixed the front-end | tip part of the said traction member to the free end side in the said correction arm are included.

  Further, “the point of action of the traction force by the traction member” means a point at which the traction force by the traction member is applied when the movable engagement member is pulled so as to rotate in the counter-engagement direction.

Further, the configuration that “the position of the action point is corrected to a position where the movable engagement member is rotated in the anti-engagement direction” will be described in more detail. As the movement direction of the closure prevention device changes, the position of the action point is changed so that the movable engagement member does not rotate in the engagement direction and engage with the engaged portion. Means that.
In the present invention, in order to realize such an action specifically, the free end side of the correction arm is detachably engaged with the pulling member, and the rotation of the correction arm is restricted. Yes.

As a means for restricting the rotation of the correction arm, for example, the correction arm may be brought into contact with the movable engagement member or a member integral with the movable engagement member.
In addition, the configuration in which the rotation of the correction arm is restricted may be, for example, a configuration in which the rotation is restricted at a predetermined position when the correction arm is rotated in one direction. As another example, a mode in which bidirectional rotation of the correction arm is restricted, that is, a mode in which the rotation range of the correction arm is set may be employed.

  According to a second aspect of the present invention, the tip of the traction member is fixed to the movable engagement member, and a midway portion of the traction member is inserted through the free end of the correction arm. To do.

  Further, the third invention is characterized in that the tip of the traction member is fixed to the free end side of the correction arm.

  According to a fourth aspect of the present invention, the correction arm is restricted from rotating by contact with the movable engagement member, so that the position of the point of action of the traction force by the traction member is determined by the movable engagement member. It is provided so that it may correct in the position rotated in the said anti-engagement direction.

  In the fifth aspect of the invention, the movable engagement member is provided with a blade for abutting and engaging with the engaged portion, and the engaged portion is provided on the tip side of the blade. A sharp convex portion is formed to abut on the surface.

The fifth aspect of the present invention achieves the effects of the fifth aspect of the present invention, which will be described later, even as an independent configuration that does not depend on the first to fourth aspects of the invention.
That is, this independent invention is provided in an opening / closing device in which an opening / closing body is slid and opened while being pulled by a flexible pulling member from the opening direction side, and is closed when the tension of the pulling member decreases. In a closing prevention device for an opening / closing device in which an operating opening / closing body is engaged with an immovable engaged portion to be braked, a fixing member fixed to the opening / closing body, and an approaching and engaging engagement with the engaged portion A movable engagement member supported by the fixed member so as to rotate in both directions of a mating engagement direction and a counter-engagement direction spaced apart from the engaged portion; Urging means for urging the urging member to rotate in the mating direction, and the movable engagement member is pulled by the traction member so as to resist the urging force of the urging means, thereby moving the movable engagement member. For opening / closing device in which member is maintained in the anti-engagement direction side In the chain preventing device, the movable engagement member is provided with a blade for abutting and engaging with the engaged portion, and a tip side of the blade is connected to the engaged portion. A sharp convex part for contact is formed.

Here, although the said convex part may be single, in order to make braking performance more favorable, it is preferable that it is plural.
Further, the sharp convex portion means that the tip shape of the convex portion is a sharp shape that is not a linear shape or a curved shape in contact with the engaged portion, and a preferable specific example of the convex shape is as follows. And an angular shape including an acute angle shape and an obtuse angle shape (especially an acute angle shape is preferable), a saw blade shape, and the like.

In the present specification, the “opening / closing body thickness direction” means the thickness direction of the opening / closing body in the closed state.
In the present specification, the “opening / closing body width direction” means a direction that is substantially orthogonal to the opening / closing direction of the opening / closing body and not the thickness direction of the opening / closing body.
Further, in this specification, the “opening / closing body opening / closing direction” is a direction in which the opening / closing body slides to partition or open the space, and this “opening / closing body opening / closing direction” houses the opening / closing body. It is used separately from the “storage direction”.
In this specification, the “storage direction” means a direction in which the opening / closing body is stored and intersects the opening / closing body opening / closing direction.

Since the present invention is configured as described above, the following effects can be obtained.
According to the first invention, when the pulling direction of the pulling member changes with the opening / closing operation of the opening / closing member, the correction arm rotates to follow the change in the pulling direction. Then, since the rotation of the correction arm stops at a predetermined restriction position, the position of the point of action of the traction force by the traction member changes, and the movable engagement member is corrected to the position for rotating in the anti-engagement direction.
Therefore, it is possible to prevent a malfunction that the movable engagement member rotates in the anti-engagement direction and engages with the engaged portion with a change in the pulling direction of the pulling member with a simple structure. .
Moreover, since the free end side of the correction arm is detachably engaged with the traction member, it is possible to prevent the traction member from being detached from the correction arm and the movable engagement member from rotating in the engagement direction. it can.

  Furthermore, according to the second invention, compared with a structure in which the tip of the traction member is directly fixed to the correction arm, the force acting on the correction arm, the support portion of the correction arm, etc. can be reduced. It is possible to prevent the straightening arm from being damaged.

  Further, according to the third aspect of the invention, when fixing the movable engaging member at the tip of the pulling member, the movable engaging member can be turned to a position where the fixing operation can be easily performed. The productivity and workability of the closure prevention device for the switchgear are good.

  Furthermore, according to the fourth aspect of the invention, the configuration for restricting the rotation of the correction arm can have a simple structure with good productivity.

  Further, according to the fifth invention, when the movable engagement member is brought into contact with the engaged portion to engage with it in order to brake the unexpected closing operation of the opening / closing body, the sharp convex portion on the blade tip side is formed. Since the biting engagement is relatively deep with respect to the engaged portion, the braking effect is good.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the closing prevention device of the present embodiment, the opening / closing body is slid and opened while being pulled by a flexible pulling member from the opening direction side, and the opening / closing body is further resisted against the pulling force of the pulling member in the opening direction. A description will be given of an example provided in an overhead door that is slid and stored in a direction intersecting with.

  As shown in FIG. 1, the overhead door 1 includes an opening / closing body 10 that opens and closes while sliding and guides both ends of the opening / closing body 10 in the width direction upward, and further guides substantially horizontally or obliquely upward. The tension of the pulling mechanism 30 that pulls the rails 20, 20, the opening / closing body 10 in the opening direction by the pulling members 33, 33 on both sides in the width direction, and the tension of at least one of the pulling members 33 is reduced due to an abnormality of the pulling mechanism 30. In this case, there are provided closing prevention devices 40 and 40 for blocking the closing operation due to the weight of the opening and closing body 10.

  The opening / closing body 10 connects a plurality of substantially rectangular panel-like members 11 elongated in the width direction in the opening / closing direction so as to rotate between the adjacent panel-like members 11, 11. Each of the plurality of rotatable roller members 12 is supported at predetermined intervals across the opening / closing body opening / closing direction, and these roller members 12 are engaged with the guide rail 20.

Further, the guide rail 20 has a vertical rail portion 21 that extends in the opening / closing direction of the opening / closing body 10 (vertical direction in the illustrated example) and a direction that intersects the opening / closing direction of the opening / closing body 10 when opened (for example, a substantially horizontal direction or The rail portion 22 is formed integrally with a horizontal rail portion 22 provided over the substantially diagonally upward direction and the like, and the vertical rail portion 21 and a corner rail portion 23 that connects the horizontal rail portion 22 in a smooth curved shape. 21, 23, and 22 are formed in a substantially concave shape in cross section so as to cover the roller member 12 in a rollable manner in the extending direction.
The guide rail 20 has an outer surface of one end portion (lower end portion in FIG. 3) in the opening / closing body thickness direction as an engaged portion 20a engaged with the closing prevention device 40 in the opening / closing body guide direction. The inner surface of the end portion is a guide surface having a substantially concave cross section for guiding the roller member 12.
According to the illustrated example, the engaged portion 20a is formed in a substantially semicircular cross section extending in the opening / closing body guide direction, and on its outer surface, rubber or A non-slip material 20a1 (see FIG. 3) made of an elastic synthetic resin or the like is coated.

  Further, the traction mechanism 30 is wound or unwound by a shaft portion 31 disposed in the opening / closing body width direction, reel portions 32 and 32 supported on both ends of the shaft portion 31, and the reel portions 32. And a pulling source 33 that biases the shaft portion 31 in a direction to wind the pulling member 33 around the reel portion 32.

  The shaft portion 31 is disposed across the opening / closing body width direction so as to be positioned on the upper extension line of the fully-closed opening / closing body 10, and each of the both end sides thereof is a stationary part (for example, the overhead door 1). A frame-like member (not shown) or a casing on which the overhead door 1 is installed) is supported rotatably via a bearing bracket or the like.

  Each reel portion 32 is a substantially cylindrical member capable of winding and unwinding the pulling member 33, and a central portion thereof is fixed to one end side of the shaft portion 31.

The pulling member 33 is a metal wire, and its end on the opening / closing body opening direction side is fixed to the outer peripheral surface of the reel portion 32, and the end on the closing direction side is attached to the closing prevention device 40 described later. It is fastened.
The pulling member 33 may be a long member that can be wound around the reel portion 32. For example, the pulling member 33 may be a metal chain or chain, or a substantially string-like member made of a material other than metal. is there.

The traction source 34 is a spring that urges the shaft portion 31 in the winding rotation direction by fixing one end side to the shaft portion 31 and fixing the other end side to the immovable portion.
The traction source 34 is configured to rotate the shaft portion 31 in the winding rotation direction by the elastic force of another elastic body such as rubber, or to rotate the shaft portion 31 in the winding rotation direction by the weight of the weight member. It is also possible to replace the mechanism, the shaft portion 31 and the like that are rotated in the winding rotation direction by the power of an electric motor or the like.
Further, according to the illustrated example, two traction sources 34 are provided, and even when one traction source 34 is idle due to a failure or damage, the urging force of the other traction source 34 can be obtained. It is also possible to adopt a configuration in which one or three or more 34 is provided.

Further, the closing prevention device 40 has a fixing member 41 (refer to FIG. 2) fixed to the opening / closing body 10 side, and a direction in which it approaches the engaged portion 20a of the guide rail 20 (hereinafter referred to as an engaging direction). The movable engagement member 42 supported by the fixed member 41 so as to freely rotate in both directions of a direction away from the engaged portion 20a (hereinafter referred to as a counter-engagement direction). An urging means 43 (see FIG. 3) for urging the engaging member 42 to rotate in the engaging direction, and the free end side of the traction member 33 are detachably engaged and the movable engaging member 42 is engaged. And a correction arm 44 (see FIG. 2 and FIG. 3) that is rotatably supported.
The closing preventing device 40 is pulled by the traction member 33 so that the movable engagement member 42 resists the urging force of the urging means 43, thereby moving the movable engagement member 42 to the anti-engagement direction side. Try to keep on.

  More specifically, the fixing member 41 protrudes in the thickness direction of the opening / closing body from both sides of the opening / closing body fixing portion 41a and the substantially flat opening / closing body fixing portion 41a fixed to the opening / closing body 10. The support piece portions 41b and 41b ′ are provided so as to perform, and the hollow shaft portion 41c is inserted and supported through the support piece portions 41b and 41b ′.

  The opening / closing body fastening portion 41a has a substantially plate shape according to the illustrated example, and is fastened to the opening / closing body 10 by fastening tools (for example, screws, bolts, rivets, etc.) inserted through the plurality of fastening holes 41a. Worn.

Each of the support piece portions 41b and 41b ′ has a substantially triangular shape in a side view according to the illustrated example, and a movable engagement member to be described later is formed by the projecting end portions 41b1 and 41b1 ′ and the proximal end portions 41b2 and 41b2 ′. The rotational range of 42 is regulated.
In FIG. 3, the protruding end side of the support piece portion 41 b is bent in a substantially square shape in order to avoid interference with the correction arm 44.

The hollow shaft portion 41c has a substantially cylindrical shape, and is inserted and supported between the support piece portions 41b and 41b ′.
The shaft member 13 is rotatably inserted into the hollow shaft portion 41c, and the roller member 12 is concentrically fixed to the end portion of the shaft member 13.
Furthermore, the hollow shaft portion 41c supports the movable engagement member 42 by allowing the movable engagement member 42 to pass through the outer peripheral surfaces on both end portions thereof.

The movable engagement member 42 has a substantially U-shaped frame-shaped movable main body 42a supported at the both ends thereof by the hollow shaft portion 41c, and a rotation regulating piece for regulating the rotation range of the movable engagement member 42. A portion 42b and a blade 42c that can be locked to the engaged portion 20a of the guide rail 20 outside the movable main body portion 42a.
Further, the movable engagement member 42 is provided with a distal end portion of the traction member 33 so as to protrude to the most free end side at the portion of the movable main body portion 42a on the side opposite to the engagement direction (the lower side in FIG. 2). A pulling member fastening portion 42d for fastening is provided.
In addition, according to the example of illustration, this movable engagement member 42 is comprised by combining several metal sheet-metal members suitably, However, You may make it comprise from one member.

According to the illustrated example, the rotation restricting piece portion 42b is provided in a substantially flat plate shape with the protruding end side facing the hollow shaft portion 41c inside the substantially U-shaped movable main body portion 42a.
The rotation restricting piece 42b abuts against the projecting end portions 41b1 and 41b1 ′ of the support pieces 41b and 41 ′ of the fixed member 41, thereby engaging the movable engaging member 42 with the engaged portion 20a. The movable engagement member 42 can be engaged with the engaged portion 20a by bringing the support piece portions 41b and 41 'into contact with the proximal end portions 41b2 and 41b2'. To the engaged position.
Further, the rotation restricting piece 42b restricts the rotation range of the movable engagement member 42 as described above, and is also engaged by the urging means 43 described later.

  The blade 42c has a substantially rectangular shape in a plan view in which a protruding end facing the engaged portion 20a is formed in a substantially blade shape that can bite into the engaged portion 20a. It arrange | positions at the free end side in the movable main-body part 42a so that it may oppose, and it is fixed by fastening means, such as a screw, a volt | bolt and a nut, a rivet, or welding.

The blade 42c may be replaced with a blade 42c ′ shown in FIG. 4 as a more preferable aspect. The blade 42c ′ has a substantially rectangular shape in plan view like the movable engagement member 42, and has a protruding end portion for contacting the engaged portion 20a, which is formed of a plurality of sharp convex portions 42b1 ′. It is formed in a saw blade shape.
According to the blade 42c ′, the biting into the engaged portion 20a can be further improved.

Further, the biasing means 43 has a substantially coil spring shape, one end side and the other end side of the biasing means 43 are locked to the rotation restricting piece portion 42b of the movable engagement member 42, and the central side of the coiled portion is protruded. Thus, the fixing member 41 is engaged with the opening / closing body fixing portion 41a.
The urging means 43 urges the movable engagement member 42 in the engagement direction relative to the fixed member 41 with the above-described configuration.

Further, the correction arm 44 engages the traction member 33 with the free end side so as to be non-detachable so that the correction arm 44 rotates in accordance with the change in the traction direction of the traction member 33, and the base end side thereof is connected to the movable engagement member 42. It is supported so as to be rotatable.
The correction arm 44 is rotated so that the position of the point of action x (see FIG. 6) of the traction force by the traction member 33 is corrected to the position where the movable engagement member 42 is rotated in the anti-engagement direction. Is regulated.

  More specifically, the correction arm 44 has its free end abutted against the movable main body portion 42a of the movable engagement member 42, and as shown in the state C of FIG. The rotation in the same rotational direction as the anti-engagement direction 42 (clockwise in the illustrated example) is restricted.

The straightening arm 44 has a midway portion inserted through the pulling member 33 on the free end side.
The structure of the straightening arm 44 in the illustrated example will be described in more detail. Two flat members 44a and 44a are arranged at predetermined intervals via a spacer 44b, a free end side pin 44c, and the like. The traction member 33 is inserted between the members 44a and 44a and between the spacer 44b and the pin 44c.
According to the illustrated example, the correction arm 44 is composed of a plurality of members as described above. For example, the correction arm 44 has the pulling member 33 on the free end side of a single long member. The structure which formed the through-hole for making it penetrate may be sufficient.

Next, basic functions and effects of the closure prevention device 40 configured as described above will be described.
As shown in FIG. 5A, the movable engagement member 42 is pulled by the pulling member 33 so as to resist the biasing force of the biasing means 43 during the normal opening / closing operation and the storing operation of the opening / closing body 10. Thus, the disengagement position rotated in the anti-engagement direction side (clockwise side in the illustrated example) is maintained.
In addition, the traction member 30 is caused by trouble on the side of the traction mechanism 30 such as cutting of the traction member 33, idle rotation of the reel portion 32 that winds the traction member 33, idle rotation of the traction source 34 that urges the reel portion 32 in the winding direction. When the tension of 33 is lowered, as shown in FIG. 5B, the movable engagement member 42 is rotated in the rotation direction along the opening / closing body opening direction by the urging force of the urging means 43 (according to the illustrated example). Turn counterclockwise.
Therefore, the movable engagement member 42 is in the engagement position (the state shown in FIG. 5B) where the blade 42c is bitten into the engaged portion 20a on the outer surface of the guide rail 20.
The biting state will be described in detail. The sharp tip portion of the blade 42c bites into the anti-slip material 20a1 coated on the surface of the engaged portion 20a.
Therefore, it is possible to prevent the opening / closing body 10 and the closing prevention device 40 integrated with the opening / closing body 10 from falling in the opening / closing body closing direction.

Next, the effect of the closing prevention device 40 when the opening / closing body 10 is closed from the storage position on the side of the horizontal rail portion 22 will be described in detail with reference to FIG.
FIG. 6 shows a state in which the closing prevention device 40 is located on each of the horizontal rail portion 22, the corner rail portion 23, and the vertical rail portion 21 of the guide rail 20 as symbols A, B, and C, respectively.
First, when the closing prevention device 40 is positioned on the lateral rail portion 22 of the guide rail 20 (see the state A shown in FIG. 6), the traction member 33 is maintained in a substantially linear shape, and the action point x by the traction member 33 is The movable engagement member 42 is rotated in the anti-engagement direction by the traction force of the traction member 33 due to the state of being located on the proximal end side of the correction arm 44 (in the illustrated example, the state substantially matching the traction member fastening portion 42d). The moved disengaged position is maintained.
In the state A shown in FIG. 6, the point of action x of the traction force by the traction member 33 is more than the virtual straight line P connecting the traction source portion p1 of the traction member 33 and the rotation center portion p2 of the movable engagement member 42. The lower position in the figure may be used.
That is, if the action point x is positioned above the virtual straight line P, the movable engagement member 42 is rotated in the engagement direction by the traction force of the traction member 33, so that the blade 42c is guided. It will bite into the engaged portion 20a of the rail 20, and the movement of the closing prevention device 40 will be hindered.

Further, when the closing prevention device 40 is positioned on the corner rail portion 23 of the guide rail 20 (see state B shown in FIG. 6), the correction arm 44 moves the pulling member 33 in accordance with the change in the pulling direction and the movable main body portion 42a. , The traction member 33 is maintained in a substantially linear shape, and the point of action x of the traction force by the traction member 33 is the proximal end side of the correction arm 44. The movable engagement member 42 is maintained at the non-engagement position by the traction force of the traction member 33. In the example shown in FIG.
Even in this state B, the point of action x of the traction force by the traction member 33 is higher than the imaginary straight line P connecting the traction part p1 ′ of the traction member 33 and the rotation center part p2 of the movable engagement member 42 in the drawing. Any position on the lower left side may be used.
That is, if the action point x is positioned above the virtual straight line P, the movable engagement member 42 is rotated in the engagement direction by the traction force of the traction member 33, so that the blade 42c is guided. It will bite into the engaged portion 20a of the rail 20, and the movement of the closing prevention device 40 will be hindered.

  In this state B, the urging force of the traction source 34 for winding the traction member 33 is relatively small, but the urging means 43 of the closing prevention device 40 is more than the urging force of the traction source 34 at this time. Since the biasing force is set smaller, it is possible to prevent the movable engagement member 42 from rotating in the engagement direction.

Further, when the closing prevention device 40 is positioned on the vertical rail portion 21 of the guide rail 20 (state C in FIG. 6), the rotation of the correction arm 44 according to the change in the pulling direction of the pulling member 33 is movable. Since it is regulated by contact with the main body 42 a, the pulling member 33 is bent on the free end side of the correction arm 44.
Therefore, the position of the point of action x of the traction force by the traction member 33 changes from the position on the base end side of the correction arm 44 described above to the position on the free end side of the correction arm 44.
Therefore, the movable engagement member 42 is maintained at the non-engagement position by the traction force of the traction member 33 acting on the action point x on the free end side of the correction arm 44.

In the state C shown in FIG. 6, the point of action x of the traction force by the traction member 33 is from an imaginary straight line P connecting the traction source portion p1 ″ of the traction member 33 and the rotation center portion p2 of the movable engagement member 42. Also, any position on the left side in the figure may be used.
That is, if the action point x is positioned on the right side in the drawing with respect to the virtual straight line P, the movable engagement member 42 is rotated in the engagement direction by the traction force of the traction member 33, so that the blade 42c bites into the engaged portion 20a of the guide rail 20, and the movement of the closing prevention device 40 is hindered.

Further, when opening and closing the opening / closing body 10 in the closed state, the operation is the reverse of the above, that is, the closing prevention device 40 is moved to the vertical rail portion 21, the corner rail portion 23, and the horizontal rail portion 22. As it moves sequentially, the correction arm 44 rotates in a direction away from the movable main body 42a (counterclockwise in FIG. 6).
Accordingly, the point of application x of the traction force by the traction member 33 changes from the free end side of the correction arm 44 to the base end side (specifically, the traction member fastening portion 42d side) of the correction arm 44, and the movable engagement member The 42 non-engagement state is maintained.

  Needless to say, the traction member 33 inserted through the free end of the correction arm 44 does not fall off from the correction arm 44 during the movement of the above-described closing prevention device 40.

  Next, another example of the closing prevention device according to the present invention will be described. In addition, about the location which is substantially the same as the closure prevention apparatus 40 mentioned above about the closure prevention apparatus shown below, the detailed description which overlaps is abbreviate | omitted by attaching | subjecting the same code | symbol as the closure prevention apparatus 40.

  The closing prevention device 40 ′ shown in FIG. 7 omits the correction arm 44 from the closing prevention device 40, supports the correction arm 44 ′ via a support bracket 45 ′, and pulls it toward the free end of the correction arm 44 ′. The distal end portion of the member 33 is fixed so as to constitute a movable engagement member 42 ′.

  The bracket 45 ′ has a substantially L shape according to the illustrated example, and a screw, a bolt and a nut, a rivet, or a weld or the like is fixed to the rotating end of the substantially U-shaped movable main body 42 a described above. Fixed by means.

Further, according to the illustrated example, the correction arm 44 ′ is formed in a substantially long shape, and its free end side is detachably engaged with the distal end portion of the traction member 33, and its proximal end side is a shaft support portion. The support bracket 45 ′ is rotatably supported via 46 ′.
According to this configuration, the closing prevention device 40 described above places the correction arm 44 on the inner side in the opening / closing body width direction than the guide rail 20 (more specifically, on the opening / closing body 10 side in the opening / closing body width direction than the guide rail 20). In contrast to the arrangement (see FIG. 3), in the closing prevention device 40 ′, the correction arm 44 ′ is arranged outside the guide rail 20 in the opening / closing body width direction.

The correction arm 44 ′ corrects the position of the point of application of the traction force by the traction member 33 to the position where the movable engagement member 42 ′ is rotated in the anti-engagement direction as the traction member 33 changes in the traction direction. As can be seen, the rotation is restricted.
More specifically, the straightening arm 44 'has its free end brought into contact with the portion of the support bracket 45' that is closer to the hollow shaft portion 41c than the shaft support portion 46 ', so that the state C in FIG. As shown in FIG. 4, the rotation of the movable engagement member 42 in the same rotation direction as the counter-engagement direction (clockwise in the illustrated example) is restricted.

According to the closure preventing device 40 ′ having the above configuration, in the state A and the state B shown in FIG. Because of the rotation, the point of action x of the traction force by the traction member 33 is located on the base end side of the correction arm 44 (in other words, the shaft support 46 ′ side), and the movable engagement member 42 ′ is in the non-engagement position. Maintained.
Further, in the state C shown in FIG. 8, the rotation of the correction arm 44 ′ accompanying the change in the pulling direction of the pulling member 33 is restricted by the contact with the support bracket 45 ′. The position of the action point x changes from the base end side of the correction arm 44 to the free end side, and the movable engagement member 42 ′ is maintained in the non-engagement position.

  Of course, during the movement of the closing prevention device 40 as described above, the traction member 33 fixed to the free end side of the correction arm 44 'does not fall off from the correction arm 44'.

  Moreover, according to the said embodiment, although the specific example which applied the closure prevention apparatus 40,40 'to the overhead door 1 is shown, the closure prevention apparatus 40,40' is used for other opening / closing apparatuses, such as a shutter apparatus. It is also possible to use it.

  Moreover, although the overhead door 1 of the above embodiment shows an example in which the traction mechanism 30 for towing the traction member 33 is provided almost directly above the closed opening / closing body 10, the traction mechanism 30 is opened and closed. The pulley is provided on the side crossing the body opening direction, and a pulley is provided above the closed opening / closing body 10, and the pulling member 33 whose pulling direction is changed by the pulley is pulled by the pulling mechanism 30. May be.

Further, the shapes of the correction arm 44 and the traction member fixing portion 42d are not limited to those of the above-described embodiment, and in the state C, the rotation of the correction arm 44 according to the change in the traction direction of the traction member 33 is a movable main body. So that both the free end side of the correction arm 44 and the traction member fastening portion 42d are located on the lower left side of the imaginary straight line P in the states A and B. What is necessary is just to make it the shape which moves the point x.
In other words, when the opening / closing body 10 is opened, the pulling member fixing portion 42d is positioned on the lower left side of the virtual straight line P, and then the movement of the action point x accompanying the rotation of the correction arm 44 is performed. When the opening / closing body 10 is closed, before the traction member fixing portion 42d is positioned on the upper right side (or the right side) of the virtual straight line P, the rotation of the correction arm 44 is restricted and the action point x is set to the initial position. The correction arm 44, the pulling member fastening portion 42d, and the like are configured so that

  Moreover, according to the said embodiment, although the preferable example which provided the closure prevention apparatus 40 in the lower end part vicinity of the opening / closing body 10 was shown, this closure prevention apparatus 40 is provided in the other position in the opening / closing body 10. FIG. For example, it may be provided at a place other than the vicinity of the lower end, or may be provided at both a position near the lower end and a place other than the vicinity of the lower end.

It is a perspective view which shows an example of the overhead door to which the closure prevention apparatus concerning this invention is applied, and the guide rail is partially cut away and the principal part is shown. It is a perspective view which shows an example of the closure prevention apparatus concerning this invention. It is a top view of the closure prevention device. It is a top view which shows the other example of a braid | blade. It is a side view of the closure prevention device, (a) shows a state where the movable engagement member is in the non-engagement position, (b) shows a state where the movable engagement member is in the engagement position. It is a side view of the closure prevention device, and shows a state where the closure prevention device is moved along the guide rail with the opening / closing body opening operation. It is a perspective view which shows the other example of the closure prevention apparatus concerning this invention. It is a side view of the closure prevention device, and shows a state where the closure prevention device is moved along the guide rail with the opening / closing body opening operation. The state which is moving the conventional closure prevention apparatus along a guide rail with opening operation | movement of an opening-closing body is shown. The state which is moving along the guide rail with the closing operation | movement of the opening / closing body of the conventional closing prevention apparatus is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Overhead door 10: Opening and closing body 20: Guide rail 20a: Engagement part 30: Pulling mechanism 33: Pulling member 40: Closure prevention device 42: Movable engagement member 42c: Blade 43: Biasing means 44: Correction arm x : Action point

Claims (5)

The opening / closing body is slid and opened from the opening direction side while being pulled by a flexible pulling member, and the opening / closing body is slid in a direction crossing the opening direction against the pulling force of the pulling member. In the opening / closing device for an opening / closing device, which is provided in the opening / closing device, and when the tension of the pulling member is lowered, the opening / closing body that performs the closing operation is engaged with the immovable engaged portion for braking.
A fixing member fixed to the opening and closing body;
A movable engagement member supported by the fixed member so as to rotate in both directions of an engagement direction approaching and engaging the engaged portion and an anti-engagement direction separating from the engaged portion. When,
Biasing means for biasing the movable engagement member to rotate in the engagement direction;
A closure for an opening / closing device in which the movable engagement member is pulled by the pulling member so as to resist the urging force of the urging means, so that the movable engagement member is maintained in the anti-engagement direction side. Prevention device,
The movable engagement member supports a correction arm in which a free end side is detachably engaged with the traction member so as to rotate with a change in the traction direction of the traction member,
The correction arm is restricted from rotating so that the position of the point of application of the traction force by the traction member is corrected to a position where the movable engagement member is rotated in the anti-engagement direction. A closure prevention device for a switchgear.   2. The opening / closing device according to claim 1, wherein a tip end portion of the traction member is fixed to the movable engagement member, and a middle portion of the traction member is inserted into a free end side of the correction arm. Closure prevention device.   2. The closing prevention device for an opening / closing device according to claim 1, wherein a tip portion of the pulling member is fixed to a free end side of the correction arm.   Since the rotation of the correction arm is restricted by contact with the movable engagement member, the position of the point of application of the traction force by the traction member is rotated in the anti-engagement direction. The closing prevention device for a switchgear according to any one of claims 1 to 3, wherein the device is provided so as to correct the position to be moved.   The movable engagement member is provided with a blade for abutting and engaging with the engaged portion, and a sharp edge for abutting the engaged portion is provided at the tip side of the blade. 5. A closure prevention device for a switchgear according to any one of claims 1 to 4, wherein a convex portion is formed.

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