JP4927413B2 - Opening and closing device with closure prevention device - Google Patents

Description

  The present invention relates to an opening / closing device with a closing prevention device that prevents the opening / closing body from closing unexpectedly, and more particularly to an opening / closing device with a closing prevention device suitable as an overhead door.

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). A braking engagement portion (blade 25) fixed to the movable engagement member (stopper 23) and engageable with the guide rail (37), and a biasing force of the biasing member on the movable engagement member (stopper 23) There is a fall prevention device provided with a pulling member (wire 35) that pulls and holds the posture so as to rotate in the anti-engagement direction against the above.
According to this fall prevention device, if the pulling member (wire 35) is cut or disconnected, or the pulling mechanism of the pulling member is damaged and idles, the tension of the pulling member decreases. The movable engagement member (stopper 23) is rotated by the urging force of the urging member, and the brake engagement portion (blade 25) is bitten into the guide rail (37), thereby opening and closing the body (shutter body). 34) can be braked.

  Further, in FIG. 1 of the cited reference 1, when the tension of the pulling member (wire 35) is reduced as described above, the braking engagement portion (stopper 3) is rotated, and the braking engagement portion (stopper) is stopped. There is also described a fall prevention device that brakes the fall of the opening / closing body (shutter body 34) by locking the tip (3a) of 3) to the locking bar (12).

However, in any of the above prior arts, the brake engaging portion (blade 25 or stopper 3) having a sharp tip is moved in an exposed state. An object or the like is sandwiched between the guide rail (37) or between the braking engagement portion (stopper 3) and the plurality of locking bars (12), or the braking engagement portion (blade 25 or stopper 3) It is desirable to devise measures such that an object or the like does not come into contact with the sharp tip.
JP 2003-56265 A (see FIGS. 1 and 3)

  The present invention has been made in view of the above-described conventional circumstances, and the problem is that the brake engaging portion for braking the movement of the opening / closing body in the unexpected closing direction comes into contact with an object or the like. An object of the present invention is to provide an opening / closing device with a closing prevention device that can prevent the above.

One means for solving the above problems includes an opening / closing body that is slidable to partition a space and can be closed downward, a flexible pulling member that pulls the opening / closing body from the opening direction side, and And a closing prevention device with a closing prevention device that brakes the movement of the opening and closing body in the closing direction when the tension of the pulling member is reduced. The closing prevention device is fixed to the opening and closing body. The fixing member is supported by the fixing member so as to rotate in both directions of an engagement direction in which the fixing member approaches and engages an immovable engaged portion and an anti-engagement direction away from the engaged portion. A movable engagement member; and an urging means for urging the movable engagement member to rotate in the engagement direction, wherein the movable engagement member is fixed so as to rotate in both directions. The movable main body supported by the member and the pulling direction of the pulling member has changed. Even so, in order to maintain the movable main body in the anti-engagement direction side by the pulling force of the pulling member, the position between the position contacting the lower edge of the movable main body and the position away from the lower edge. The movable body is supported by the lower end of the movable main body so as to freely rotate, and the correction arm having the pulling member inserted or fixed to the free end thereof is fixed to the movable main body and the engaged member. And a movable engagement member that engages the correction arm with the lower edge of the movable main body during movement in the vertical direction accompanying the opening / closing operation of the opening / closing body. When the tension of the traction member is lowered by being pulled by the traction member so as to resist the urging force of the urging means while being in contact with the portion, , Rotate the correction arm downward to move away from the lower edge of the movable body Causes, consists of the brake engagement portion rotates to the engagement direction by the biasing force of said biasing means so as to engaged with the engaged portion, the brake engaging portion, said opening and closing member It is characterized by being covered with a cover member so as not to be hindered from being moved in accordance with the movement of and the movement in the engaging direction with respect to the engaged portion.

The first embodiment includes an opening / closing body that can be slid and closed so as to partition a space, and a braking engagement portion that is integrally provided with the opening / closing body and is movable toward an immovable engaged portion. In the opening / closing device with a closure preventing device, the braking engagement portion is configured to brake the movement of the opening / closing body in the closing direction by engaging the braking engagement portion with the engaged portion. The cover member is covered with a cover member so that the movement in the operation of the opening / closing body and the movement in the engagement direction with respect to the engaged portion are not hindered.
Here, the opening / closing device with a closing prevention device according to the present embodiment is applied to an opening / closing device (for example, an overhead door device) in which the opening / closing body is slid to open and stored in a direction crossing the opening direction. However, the shutter device for storing the closure prevention device by winding the opening and closing body, etc., doors, sliding doors including rain doors, windows, roll screens, blinds, awning devices, gates, gates, sliding wall devices, etc. It is also possible to apply to an opening / closing device other than an overhead door device.

  The opening / closing body has 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, a net-like object, etc. are provided in the opening / closing direction It can be set as the aspect etc. which combine a slat, a panel, a pipe, a sheet-like thing, a net-like thing etc. suitably.

The engaged portion is an object to be engaged when the opening / closing body is engaged and braked, and is a portion that does not move relative to the opening / closing body that moves in the opening / closing direction.
Specific examples of the engaged portion include a guide rail that guides the opening / closing body in the opening / closing direction and the storage direction, a support that supports the guide rail, and a housing that is an installation target of the closure prevention device.

Further, the brake engaging portion is configured to move toward the engaged portion and engage with the engaged portion, thereby braking the movement of the opening / closing body in the closing direction. In addition, this configuration may or may not include a mechanism for releasing the state when engaged.
The braking engagement portion includes a mode of engaging the engaged portion by a rotational motion or a curved motion, a mode of engaging the engaged portion by a linear motion, and the like.
Further, the brake engaging portion is engaged with the engaged portion so as to be engaged with the engaged portion, or is engaged with the engaged portion so as to fit in an uneven shape. The aspect etc. which slidably contact with to-be-engaged part are included.

  Further, in the configuration of “braking the opening / closing body in the closing direction by engaging the brake engaging portion with the engaged portion”, the opening / closing body that performs the closing operation is fixed. And the closing operation of the opening / closing body is stopped, or the closing operation of the opening / closing body is slidably brought into contact with the immovable engaged portion to slow down the closing speed of the opening / closing body. And the like.

Moreover, the said cover member should just be a member which covers the said brake engaging part so that the movement accompanying the operation | movement of the said opening / closing body and the movement to the engagement direction with respect to the said to-be-engaged part may not be prevented.
Specific examples of the cover member include a mode in which the brake engaging portion is moved to the moving direction in the engagement direction in accordance with the operation of the opening / closing body and the movement member is fixed to a stationary part so as to cover the moving path. Examples include an aspect that is disposed so as to cover the movement path in the direction of movement, and is provided so as to move in accordance with the movement of the braking engagement portion accompanying the operation of the opening and closing body.
Further, as a specific example of the cover member, the cover engaging portion (in other words, the end portion on the engaging direction side) other than the engaging portion in the braking engaging portion is covered so as to be integrated with the braking engaging portion. The aspect provided in may be sufficient.
In addition, a single cover member or a plurality of cover members may be provided for the braking engagement portion.

Further, in the second embodiment, the cover member, that provided in stationary parts so as to cover the path of movement of the brake engaging portion associated with the operation of the opening and closing member.

As a specific example of this second form , it is preferable that at least a part of the moving path on the opening / closing body closing direction side is covered with the cover member. However, as another example, the moving path is closed with the opening / closing body closed. It is good also as an aspect which covers the part which extends in the opening-and-closing body opening / closing direction including the part of a direction side with the said cover member.
Furthermore, as another example of this second form , it is also possible to adopt a mode in which a part other than the part on the opening / closing body closing direction side of the moving path (for example, the part on the opening / closing body opening direction side) is covered with the cover member. In this aspect as well, in the portion covered by the cover member, the present invention has its own effects.
In the second embodiment , the cover member is preferably configured to be continuous in the opening / closing body opening / closing direction, but may be configured to include a plurality of members intermittently provided in the opening / closing body opening / closing direction. Is possible.
Moreover, this 2nd form includes both the aspect which covers the movement path | route of the said braking engagement part accompanying the operation | movement of the said opening-closing body partially with the said cover member, and the aspect which covers entirely.

In the third embodiment , the immovable part is a guide rail that guides the opening / closing body in its operating direction, and the movement path of the braking engagement portion accompanying the operation of the opening / closing body is defined as the cover member and the It was covered with a guide rail .

Here, to the guide rail, the opening / closing body is guided in a substantially linear and / or curved manner in the opening direction, or the opening / closing body is guided in the opening direction and further in a direction crossing the opening direction. Including embodiments.
Further, in the third mode , both the mode in which the movement path of the braking engagement portion accompanying the operation of the opening / closing body is partially covered by the cover member and the guide rail and the mode in which the path is entirely covered. including.

In the fourth embodiment , the guide rail includes a vertical rail portion disposed on the opening / closing body closing direction side, a horizontal rail portion disposed so as to intersect the vertical rail portion, and the vertical rails. It consists of the parts and the transverse rail section and corner rail portion disposed so as to continuously, the cover member, that provided at least along said longitudinal rail section.

  In addition, the said horizontal rail part should just be a rail part arrange | positioned so that it may cross | intersect with the said vertical rail part. That is, in this horizontal rail part, the said vertical rail part arrange | positioned substantially perpendicularly | vertically On the other hand, it includes a rail portion disposed in a substantially horizontal shape, a rail portion disposed in an inclined shape (more specifically, a diagonally upward direction, a diagonally downward direction, and the like).

Further, in the fifth embodiment, the cover member, that provided integrally to the movable member.

Here, the cover member in the fifth embodiment may be directly fixed to the opening / closing body, for example, or indirectly to the opening / closing body via a member or the like that supports the braking engagement portion. It may be fixed to.

In the sixth embodiment , both the fixing member fixed to the opening / closing body, the engagement direction approaching and engaging the engaged portion, and the anti-engagement direction separating from the engaged portion A movable engagement member supported by the fixed member so as to rotate in the direction, and biasing means for biasing the movable engagement member so as to rotate in the engagement direction. A closing prevention device is configured by providing the braking engagement portion on the joint member, and the movable engagement member is maintained in the anti-engagement direction side by being pulled by the pulling member from the opening / closing body opening direction side. a closure preventing device equipped retracting device, the cover member so as to cover the rotation path of at least the movable engaging member, that provided integrally with the fixing member.

Here, the said fixing member should just be a member fixed with respect to the said opening-and-closing body, The concrete shape, structure, 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 biasing means includes a configuration in which the movable engagement member is rotated in the engagement direction by its own weight or the weight of the weight.

  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.

In addition, the configuration of “at least covering the rotation path of the movable engagement member” includes an aspect in which only the movable engagement member is covered by the cover member and other members including the movable engagement member. In order to make the cover member more compact, including the aspect covered by the cover member, the former aspect is preferable.
Furthermore, this configuration includes an aspect in which the rotation path of the movable engagement member is partially covered by the cover member, and an aspect in which the rotation path is entirely covered by the cover member. Both are included, preferably the latter embodiment.

Further, in the seventh embodiment, the brake engagement portion, that have a sharp protrusion for engaging by contact to the engaged portion.

The seventh embodiment has the same effects as the seventh embodiment described later even as an independent configuration that does not depend on the first to sixth embodiments .
That is, this independent configuration includes an opening / closing body that can slide and close so as to partition a space, and a braking engagement that is integrally provided with the opening / closing body and that is movable toward an immovable engaged portion. In the opening / closing device with a closure preventing device, the braking engagement portion is configured to brake the movement of the opening / closing body in the closing direction by engaging the braking engagement portion with the engaged portion. The part has a sharp convex part for abutting and engaging with the engaged part.

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” means a direction in which the opening / closing body slides to partition or open the space .

Since the said form is comprised as demonstrated above, there exists an effect as described below.
According to the first aspect , since the brake engaging portion is covered by the cover member, an object or the like is sandwiched between the brake engaging portion and the engaged portion, or the moving brake engaging portion is It is possible to prevent contact with an object or the like.

Furthermore, according to the 2nd form , it can prevent effectively that a brake engaging part contacts a thing etc. over the movement path | route of the brake engaging part accompanying operation | movement of an opening-closing body.

Furthermore, according to the third embodiment , the moving path of the braking engagement portion accompanying the operation of the opening / closing body is covered with the cover member and the guide rail.
Therefore, the structure that covers the braking engagement portion can be a space-saving structure that uses the guide rail.

Furthermore, according to the fourth embodiment, it is possible to effectively prevent the braking engagement portion from contacting an object or the like by the cover member having the minimum necessary length.

Furthermore, according to the fifth embodiment , since the cover member moves in the opening / closing direction integrally with the opening / closing body, there is no need to provide the cover member in a long length in the opening / closing body opening / closing direction. Can be made more compact.

Furthermore, according to the sixth embodiment , it is possible to prevent the braking engagement portion from contacting an object or the like, as well as preventing the movable engagement portion from contacting the object or the like when rotating. You can also. In addition, the cover member can be made into a compact aspect integrated with the closing prevention device.

Further, according to the seventh embodiment , when the brake engaging portion is brought into contact with the engaged portion and engaged in order to brake the unexpected closing operation of the opening / closing body, the sharp protrusion of the braking engaging portion is formed. Since the portion bites into and engages with the engaged portion relatively deeply, the braking effect is good .

Next, a preferred specific example of the above embodiment will be described with reference to the drawings.
The following opening / closing device with a closing prevention device opens and closes the opening / closing body while pulling it from the opening direction side by a flexible pulling member, and further opens the opening / closing body against the pulling force of the pulling member. An example applied to an overhead door that is slid in the direction intersecting the door and stored therein will be described.

  As shown in FIG. 1, the overhead door 1 has an opening / closing body 10 that opens and closes while sliding, and guides that guide both ends in the width direction of the opening / closing body 10 upward and further to a substantially horizontal direction or obliquely upward. The tension of the pulling mechanism 30 that pulls the rails 20 and 20, the opening / closing body 10 in the opening direction by the pulling members 33 and 33 on both sides in the width direction, and the tension of at least one of the pulling members 33 due to the malfunction of the pulling mechanism 30 or the like. The closing prevention devices 40 and 40 prevent the closing operation due to the dead weight of the opening / closing body 10 and the movement path of the braking engagement portion 42c of each closing prevention device 40 is fixed to the guide rail 20 which is an immobile portion. The cover member 50 is covered.

  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. 2) 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. 2) 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-shaped 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, a substantially string-like or belt-like member made of a material other than metal. It is also possible.

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, as shown in FIGS. 2 and 4, the closing prevention device 40 is in the direction in which the fixing member 41 fixed to the opening / closing body 10 side is brought into close engagement with the engaged portion 20 a of the guide rail 20 (hereinafter referred to as the engagement member 20 a). , Referred to as an engagement direction) and a movable member 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 an anti-engagement direction). An engaging member 42 and an urging means 43 for urging the movable engaging member 42 to rotate in the engaging direction are provided.
In the closing prevention device 40, the movable engaging member 42 is pulled by the pulling member 33 so as to resist the biasing force of the biasing means 43, so that the brake engaging portion 42c of the movable engaging member 42 is It is comprised so that it may be maintained by the said anti-engagement direction side.

The fixing member 41 is a member fixed and fixed to the opening / closing body 10. The shaft member 13 is rotatably inserted into a hollow shaft portion 41 a inserted in the opening / closing body width direction. The roller member 12 is fixed to the end of the guide rail 20 side.
Further, on the outer periphery of the hollow shaft portion 41a, a movable engagement member 42 is rotatably supported and an urging means 43 made of an elastic body such as a coil spring is supported.

  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 protrudes from the lower end of the movable main body 42a to the free end side. A traction member fastening portion 42d to which the distal end portion is fastened, and a correction arm 44 that is rotatably supported by the lower end portion of the movable main body portion 42a and has a midway portion of the traction member 33 inserted through the free end side thereof. And a brake engaging portion 42c that can be locked to the engaged portion 20a of the guide rail 20 outside the movable main body portion 42a.

When the closing prevention device 40 is positioned on the vertical rail portion 21 of the guide rail 20, the correction arm 44 abuts on the lower edge portion of the movable main body portion 42 a and is restricted from rotating. The traction force is applied so that the movable engagement member 42 rotates in the anti-engagement direction.
Further, the straightening arm 44 has a lower edge of the movable main body 42a according to a change in the pulling direction of the pulling member 33 when the closing prevention device 40 is positioned on the corner rail portion 23 and the lateral rail portion 22 of the guide rail 20. The traction force of the traction member 33 is applied in a direction to rotate the movable engagement member 42 in the anti-engagement direction.

  That is, according to this correction arm 44, the closing prevention device 40 changes its posture by moving the range of the guide rail 20 over the vertical rail portion 21, the corner rail portion 23, and the horizontal rail portion 22, and responds to the change in the posture. Even if the pulling direction of the pulling member 33 changes, the pulling force of the pulling member 33 can maintain the movable engagement member 42 in a state of not being engaged with the engaged portion 20a.

Further, according to the example shown in FIG. 2, the braking engagement portion 42 c has a substantially rectangular shape in plan view in which a protruding end portion facing the engaged portion 20 a is formed in a substantially blade shape that can bite into the engaged portion 20 a. Presents a shape.
The braking engagement portion 42c is disposed on the free end side of the movable main body portion 42a so as to face the engaged portion 20a of the guide rail 20, and is a fastening means such as a screw, a bolt and nut, a rivet, or welding. It is fixed by.

The braking engagement portion 42c may be replaced with a braking engagement portion 42c ′ shown in FIG. 3 as a more preferable aspect. The braking engagement portion 42c ′ has a substantially rectangular shape in a plan view like the movable engagement member 42, and a protruding end portion for contacting the engaged portion 20a is formed by a plurality of sharp convex portions 42c1 ′. It is formed in a substantially saw blade shape.
According to the braking engagement portion 42c ′, the biting into the engaged portion 20a can be made better.

Further, the cover member 50 is a member having a cross-sectional frame shape as shown in FIG. 2, and covers the movement path of the braking engagement portion 42 c accompanying the operation of the opening / closing body 10.
More specifically, according to the illustrated example, the cover member 50 includes a fastening portion 51 that is fastened to the guide rail 20 via the auxiliary cover member 53, and an opening / closing body width from the movable main body portion 42a. The cover main body portion 52 covers the braking engagement portion 42c protruding in the direction so as to have a substantially L-shaped cross section, and is provided so as to cover substantially the entire length of the vertical rail portion 21 of the guide rail 20.
The means for fixing the fixing portion 51 may be screw fixing, bolt and nut tightening, riveting, fitting, welding, adhesion, or the like. In particular, from the viewpoint of improving maintainability, a removable fixing is possible. It is preferable to use attachment means (for example, screwing, bolt and nut tightening, fitting, etc.).

  The auxiliary cover member 53 is a member provided along the cover member 50 so as to cover the movement path of the correction arm 44 associated with the opening / closing operation of the opening / closing body 10, and the correction arm 44 is being moved. It prevents contact with things.

Next, the basic effect of the closure preventing device 40 having the above configuration will be described.
As shown in FIG. 4A, 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 storage 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 biases the reel portion 32 in the winding direction. When the tension of 33 decreases, the movable engaging member 42 rotates in the direction of opening and closing of the opening / closing body by the urging force of the urging means 43 as shown in FIG. Turn counterclockwise.
Therefore, the movable engagement member 42 is in the engagement position (the state shown in FIG. 4B) 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.

Further, when the movable engagement member 42 rotates in the engagement direction as described above, the brake engagement portion 42c is located in the space covered by the cover member 50, the guide rail 20, and the like, and is almost exposed to the outside. Not.
Accordingly, it is possible to prevent an object or the like from being sandwiched between the braking engagement portion 42c and the engaged portion 20a of the guide rail 20, or the moving braking engagement portion 42c from contacting the object or the like. it can.

  Further, even during the movement of the braking engagement portion 42c associated with the opening / closing operation of the opening / closing body 10, the movement path is covered by the cover member 50, the guide rail 20, and the like, so the braking engagement portion 42c and the guide rail 20 are also covered. It is possible to prevent an object or the like from being sandwiched between the engaged portion 20a or the moving brake engaging portion 42c from contacting the object or the like.

According to the above embodiment, as shown in FIG. 2, in the opening / closing body width direction, only the brake engaging portion 42c is covered with the cover member 50. However, as another embodiment, FIG. 2, the front end side of the cover main body 52 of the cover member 50 extends in the opening / closing body width direction, and the extended main body 42 a of the movable engagement member 42 is formed by the extended portion 52 ′. You may make it cover.
According to this configuration, the movable engagement member 42 can be prevented from coming into contact with an object or the like during the movement of the closing prevention device 40 or the rotation of the movable engagement member 42.

  Further, according to the above-described embodiment, as shown in FIG. 1, only the portion of the vertical rail portion 21 of the guide rail 20 is covered with the cover member 50. In order to prevent this more reliably, the corner rail portion 23 and the horizontal rail portion 22 may be covered with a cover member similar to the cover member 50 described above.

Further, according to the above-described embodiment, as shown in FIG. 1, the cover member 50 is provided on substantially the entire length of the vertical rail portion 21, but in order to make the structure simpler, the cover member 50 is provided with the vertical rail. You may make it provide partially with respect to the part 21. FIG.
In the case of this configuration, it is preferable that a portion of the vertical rail portion 21 on the closing direction side is covered with the cover member 50.

  Next, further different forms of cover members will be described in detail. Note that, in the configuration described below, the same reference numerals are used for portions that are substantially the same as the configuration described above, and a detailed description that overlaps is omitted.

5 and 6 has a configuration in which the cover member 50 is replaced with a cover member 60 in the overhead door 1 of the above embodiment.
The cover member 60 is supported by the fixing member 41 of the closing prevention device 40 so as to cover the rotation path of the movable engagement member 42 including the braking engagement portion 42c.
Specifically, the cover member 60 includes a fastening portion 61 that is fastened to the fixed member 41 and a cover main body portion 62 that covers the movable engagement member 42.

  The means for fixing the fixing portion 61 to the fixing member 41 may be screw fixing, bolt and nut tightening, riveting, fitting, welding, adhesion, or the like. Alternatively, the fastening portion 61 may be a member integrated with the fixing member 41.

  Further, according to the illustrated preferred example, the cover main body portion 62 is formed in a substantially bowl shape, and covers the rotation path (the upper portion according to FIG. 6) of the movable engagement member 42 in the closing prevention device 40.

According to the above configuration, the braking engagement portion 42c is located in a space surrounded by the cover main body 62, the movable main body 42a, the guide rail 20 (see FIG. 6), and the like of the cover member 60.
Accordingly, when the closing prevention device 40 moves in accordance with the opening / closing operation of the opening / closing body 10, an object or the like is caught between the braking engagement portion 42c and the guide rail 20, or the moving braking engagement portion 42c is replaced with an object or the like. Can be prevented from touching.
Further, when the tension of the traction member 33 is reduced due to the trouble on the traction mechanism 30 side and the movable engagement member 42 is rotated in the engagement direction, the rotation path is covered by the cover member 60. Therefore, it is possible to prevent the rotating movable engagement member 42 and the brake engagement portion 42c from coming into contact with an object or the like.

Further, in the embodiment shown in FIGS. 7 and 8, in the embodiment shown in FIGS. 5 and 6 described above, the closing prevention device 40 is replaced with the closing prevention device 40 ′, and the cover member 60 is replaced with the cover member 60 ′. It is said.
The closing prevention device 40 ′ omits the correction arm 44 from the closing prevention device 40, supports the correction arm 44 ′ via the support bracket 45 ′, and the tip of the traction member 33 on the free end side of the correction arm 44 ′. The movable engagement member 42 ′ is configured so as to be fixed to each other.

  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 the distal end portion of the traction member 33 is fixed to the free end side thereof, and the proximal end side thereof is supported by the shaft support portion 46 ′. The support bracket 45 'is supported so as to be rotatable.
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. 2), in the closing prevention device 40 ′, the correction arm 44 ′ is arranged outside the guide rail 20 in the opening / closing body width direction.

Further, the cover member 60 ′ is substantially the same as the cover member 60 described above, and a cover body portion 62 ′ that covers a fastening path 61 ′ fastened to the fixed member 41 and a rotation path of the movable engagement member 42 ′. It consists of and.
The cover body 62 ′ is formed with a projecting piece 62a ′ so as to overlap the support bracket 45 ′ at a portion corresponding to the braking engagement portion 42c. The projecting piece 62a ′ prevents an object inserted between the cover main body 62 ′ and the support bracket 45 ′ from coming into contact with the braking engagement portion 42c.

According to the closing prevention device 40 ′ having the above configuration, the movable engagement member 42 is engaged with the engaged portion 20a during the normal opening / closing operation of the opening / closing body 10 in substantially the same manner as the closing prevention device 40. The traction force of the traction member 33 can be applied so as to be maintained in a state that does not match.
Further, according to the closing prevention device 40 ′, when the tension of the traction member 33 is lowered by the support on the traction mechanism 30 side or the like in substantially the same manner as the above-described closing prevention device 40, the movable engagement member 42 ′. Can be engaged with the engaged portion 20a of the guide rail 20 by rotating in the engagement direction.

Further, according to the closing prevention device 40 ′ and the cover member 60 ′ having the above-described configuration, the closing prevention device 40 ′ is being moved in accordance with the opening / closing operation of the opening / closing body 10 in substantially the same manner as the closing prevention device 40 and the cover member 60 described above. In addition, it is possible to prevent the cover member 60 ′ from sandwiching an object or the like between the brake engaging portion 42 c and the guide rail 20, or contacting the brake engaging portion 42 c with the object or the like.
Further, when the movable engagement member 42 ′ is rotated in the engagement direction due to a hindrance on the traction mechanism 30 side, the rotating movable engagement member 42 ′ and the brake engagement portion 42 c come into contact with an object or the like. This can be prevented by the cover member 60 '.

  5 to 8, at least the movable engagement member 42 (or 42 ′) and the brake engagement portion 42c are at least effectively prevented from coming into contact with an object with a minimum necessary area. The cover member 60 (or 60 ′) that covers only the upper part of the closing prevention device 40 (or 40 ′) is configured to cover the rotation path of the movable engagement member 42. As another example, the cover member 60 (or 60 ′) is closed. You may make it comprise the cover member (not shown) which covers entirely from the upper side to the lower side of the prevention apparatus 40 (or 40 ').

Moreover, in the aspect shown in FIG. 9, it is set as the structure which further provided the object detection apparatus 70 with respect to the overhead door provided with the closure prevention apparatus 40 and cover member 60 which were shown in FIG.5 and FIG.6 mentioned above.
The object sensing device 70 includes a support bracket 71 fixed to the guide rail 20, a sensing unit 72 fixed to the support bracket 71 so as to form an obstacle sensing medium path in the opening / closing body width direction, And a protective member 73 provided in a substantially frame shape so as to protect the sensing portion 72.

  When the opening / closing body 10 is substantially fully closed, the support bracket 71 is secured to the guide rail 20 so as to cover the side of the closing prevention device 40 and the cover member 60 (specifically, the outside in the opening / closing body width direction). According to the illustrated example, the cross section is formed in a substantially U-shaped frame shape.

The sensing unit 72 is a so-called infrared sensor using infrared as an object sensing medium, and its emitting part is disposed on the side of one guide rail 20 via the support bracket 71, and the light receiving part has the same structure. Is disposed on the other guide rail side (not shown).
The sensor may be any sensor that can detect an object or the like in a non-contact manner. As another example, the sensor may be replaced with a sensor that uses light other than infrared rays, ultrasonic waves, radio waves, or the like as an object sensing medium. is there.

  Further, the protective member 73 is fixed to the support bracket 71 corresponding to each guide rail 20 so as to surround the emission part or the light receiving part of the sensing part 72.

According to the above configuration, the path of the object sensing medium is formed at a position between the guide rails 20 and 20 on the opening / closing body closing direction side and does not interfere with the opening / closing body 10, and the object entering the path Or the like can be sensed by the sensing unit 72, and the opening / closing body 10 can be controlled to be reversed or stopped.
Furthermore, according to the above configuration, when the opening / closing body 10 is substantially fully closed, the side sides of the closing prevention device 40 and the cover member 60 are covered with the support bracket 71, so that the closing prevention device 40 and the cover member 60 are It is possible to prevent an object or the like from being inserted through the gap on the side and coming into contact with the braking engagement portion 42c.

In addition, according to the example shown in FIG. 9, a mode in which the support bracket 71 is partially disposed on the closing direction side of the guide rail 20 is shown. However, as a more preferable mode, the support bracket 71 is arranged on the guide rail 20. You may provide so that the vertical rail part 21 may extend over the substantially full length.
According to this configuration, it is possible to prevent an object or the like from being inserted through a gap on the side between the closing prevention device 40 and the cover member 60 and coming into contact with the braking engagement portion 42c over substantially the entire length of the vertical rail portion 21. Can do.
Further, the cover member 60 is disposed in a range extending from the vertical rail portion 21 to the corner rail portion 23 of the guide rail 20 or in a range extending from the vertical rail portion 21, the corner rail portion 23, and the horizontal rail portion 22 of the guide rail 20. It is also possible to do.

  Further, in the example shown in FIG. 9, the anti-closure device 40 can be replaced with the anti-closure device 40 ′ shown in FIGS. 7 and 8.

It is a perspective view which shows an example of the switchgear with a closure prevention apparatus concerning this invention. It is principal part sectional drawing of the opening / closing apparatus with the closure prevention apparatus. It is a top view which shows the other example of a braking engagement part. It is a side view which shows operation | movement of a closure prevention apparatus, (a) shows the state which the brake engaging part has not engaged with the to-be-engaged part, (b) has engaged the brake engaging part with the to-be-engaged part. It shows a state of matching. It is a principal part perspective view which shows the other example of the closure prevention apparatus used for the opening / closing apparatus with a closure prevention apparatus concerning this invention. It is a principal part side view of the opening / closing apparatus with the closure prevention apparatus. It is a principal part perspective view which shows the other example of the closure prevention apparatus used for the opening / closing apparatus with a closure prevention apparatus concerning this invention. It is a principal part side view of the opening / closing apparatus with the closure prevention apparatus. It is the principal part perspective view which is another example of the opening / closing apparatus with a closure prevention apparatus concerning this invention, and shows the aspect provided with the object sensing apparatus.

DESCRIPTION OF SYMBOLS 1: Overhead door 10: Opening and closing body 20: Guide rail 21: Vertical rail part 23: Corner rail part 22: Horizontal rail part 20a: Engagement part 30: Traction mechanism 33: Traction member 42: Movable engagement member 42c: Braking Engagement part 42c1 ': Sharp convex part 43: Biasing means 50: Cover member 60: Cover member

Claims (9)

An openable / closable body that slides so as to divide the space and can be closed downward, a flexible traction member that pulls the open / close body from the open direction side, and the opening / closing member when the tension of the traction member decreases An opening / closing device with a closing prevention device , comprising: a closing prevention device that brakes movement of the body in the closing direction;
The closing prevention device includes a fixing member fixed to the opening / closing body, an engagement direction for approaching and engaging an immovable engaged portion, and a counter-engaging direction for separating from the engaged portion. A movable engagement member supported by the fixed member so as to rotate to a position, and a biasing means for biasing the movable engagement member to rotate in the engagement direction.
The movable engagement member includes a movable main body supported by the fixed member so as to rotate in both directions, and the movable main body is moved by the traction force of the traction member even if the traction direction of the traction member changes. The lower end of the movable main body so as to freely rotate between a position in contact with the lower edge of the movable main body and a position away from the lower edge so as to maintain the anti-engagement side. A correction arm that is supported by the portion and has the traction member inserted or fixed to the free end thereof, and a braking engagement portion that is fixed to the movable main body portion and can be locked to the engaged portion. Equipped,
The movable engagement member is urged by the urging force of the urging means in a state in which the correction arm is in contact with the lower edge of the movable main body during movement in the vertical direction accompanying the opening / closing operation of the opening / closing body. By being pulled by the pulling member so as to resist, the anti-engagement direction side is maintained, and when the tension of the pulling member decreases, the correction arm is separated from the lower edge of the movable main body. It is configured to rotate downward and rotate in the engagement direction by the urging force of the urging means to lock the braking engagement portion to the engaged portion.
The brake engagement portion is covered with a cover member so as not to be hindered from being moved in the engagement direction with respect to the engaged portion and the movement of the opening / closing body. Switchgear with device. The fixing member has a hollow shaft portion that is inserted in the opening / closing body width direction, and supports the movable engagement member rotatably on the outer periphery of the hollow shaft portion and supports the biasing means. The opening / closing device with a closure preventing device according to claim 1. The movable engagement member is arranged at a position closer to the opening / closing body opening direction than the hollow shaft portion so that the movable engagement member can be engaged with the engaged portion on the side of the movable main body. The opening / closing apparatus with a closure preventing apparatus according to claim 2, wherein A guide rail for guiding the opening and closing body in the opening and closing direction;
4. A shaft member is rotatably inserted into the hollow shaft portion, and a roller member that engages and rolls on the guide rail is provided at an end portion of the shaft member. The opening / closing device with a closing prevention device according to the description. The guide rail includes a vertical rail portion disposed on the opening / closing body closing direction side, a horizontal rail portion disposed so as to intersect the vertical rail portion, and the vertical rail portion and the horizontal rail portion being continuous. It is composed of corner rails arranged to allow
When the anti-closing device is positioned on the vertical rail portion, the correction arm abuts against the lower edge portion of the movable main body portion and is restricted from rotating so that the traction force of the traction member is controlled by the movable arm. The engagement member acts to rotate in the anti-engagement direction,
The straightening arm rotates in a direction away from the lower edge of the movable main body according to a change in the pulling direction of the pulling member when the closing prevention device is positioned on the corner rail portion and the horizontal rail portion. The opening / closing device with a closure preventing device according to claim 4, wherein the opening / closing device moves and causes the pulling force of the pulling member to act in a direction in which the movable engagement member rotates in the anti-engagement direction . The closure prevention according to any one of claims 1 to 5, wherein the cover member is provided at a non-moving portion so as to cover a moving path of the braking engagement portion accompanying the operation of the opening and closing body. Switchgear with device. The opening / closing device with a closing prevention device according to any one of claims 1 to 6, wherein an auxiliary cover member is provided to cover a movement path of the correction arm accompanying the opening / closing operation of the opening / closing body .   The opening / closing device with a closing prevention device according to claim 1, wherein the cover member is provided integrally with the opening / closing body.   9. The opening / closing device with a closure preventing device according to claim 8, wherein the cover member is provided integrally with the fixed member so as to cover at least a rotation path of the movable engagement member.

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