JP2007231698A - Device to prevent opening and closing apparatus from shutting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a braking function in a closing operation of an opening and closing body, which is weakened due to a decrease in tension or the like in a traction member. <P>SOLUTION: After a latch portion 5 installed to an opening and closing body 10 is latched with respect to a portion to be latched 6 arranged to an unmovable portion facing the latch portion 5, a tension in a traction member 33 decreases thereby braking closing operation of the opening and closing body 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is provided in an opening / closing device such as an overhead door device, other shutter devices, a gate device, etc. that is opened by sliding an opening / closing body that partitions a space while being pulled by a pulling member, and the tension of the pulling member is reduced. The present invention relates to a closing prevention device for an opening / closing device that prevents the opening / closing body from closing unexpectedly when the opening / closing member is closed.

Opening and closing body that divides the space is opened in overhead door devices such as an overhead door device, other shutter devices, and gate devices that are slid while being pulled by the pulling member, and opens and closes when the tension of the pulling member decreases. The following patent document 1 exists as prior art document information related to a closing prevention device for an opening / closing device that prevents the body from closing unexpectedly.
The invention described in Patent Document 1 discloses an opening / closing device (overhead door device) that stops and closes the opening / closing body (door body 1) by cutting the pulling member (suspending body 6) or the like. ) The movable claw 9 in the closing prevention device (safety device) is brought into contact with the inner side of the one side piece 3a of the guide rail 3 by the urging force of the urging means (the ammunition 15) and faces the outer side of the one side piece 3a. The one side piece 3a is clamped by the fixed claw 10 to be held, and the closing operation of the opening / closing body is braked by the frictional resistance of the movable claw 9 and the fixed claw 10 with respect to the one side piece 3a generated by this clamping force.
Japanese Patent No. 3371219 (see [0010] and [FIG. 4])

  However, the closing prevention device for an opening / closing device of Patent Document 1 has a structure that stops the closing operation of the opening / closing body by the frictional resistance between the movable claw 9 and the fixed claw 10 with respect to the one side piece 3a in the guide rail 3. When the frictional resistance is insufficient with respect to the momentum due to the closing operation of the opening / closing body to which the weight of the body is added, the movable claw 9 and the fixed claw 10 slide with respect to the one side piece 3a, and the opening / closing body closing operation is performed. There is a possibility that it cannot be stopped.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve a braking function for a closing operation of an opening / closing body caused by a decrease in tension of a traction member, and an object of the present invention is to provide a closing prevention device for an opening / closing device that solves this problem.

The first invention adopted by the present invention to solve the above problems is that the opening / closing body is pulled and slid by a flexible pulling member from the opening direction side, and the opening / closing body is further pulled by the pulling force of the pulling member. In the opening / closing device for opening and closing, which is provided in an opening / closing device that is slid against the sliding force and that brakes the opening / closing body that closes when the tension of the traction member decreases,
A latching portion disposed on the opening / closing body engages with any one of a plurality of latching portions provided along the opening / closing direction of the opening / closing body at a stationary part facing the latching portion. Due to this, the tension of the pulling member is lowered to brake the closing operation of the opening / closing body that performs the closing operation,
The latching portion is biased in a direction to engage with the latched portion by the biasing force of the biasing means, and is not latched with respect to the latched portion by the tension of the pulling member exceeding the biasing force of the biasing force. When the state is maintained and the tension of the traction member decreases below the biasing force of the biasing means, the latching portion is engaged with the latched portion by the biasing force of the biasing means. It became a closure prevention device.

The opening / closing body device referred to in the present invention is an opening / closing device such as an overhead door device, other shutter device, gate device, or the like that opens and closes an opening / closing body that partitions a space while being pulled by a pulling member.
Further, as the engagement form of the latching portion and the latched portion referred to in the present invention, for example, engagement by a concave portion including a through hole, a notch or a dent, and a convex portion hooked into the concave portion, or Engagement between convex parts, engagement by a horizontal hook-like member and a hook-like member hooked on the horizontal hook-like member, etc. are mentioned.

Further, from the viewpoint of quickly braking the opening / closing body, in the second invention, the hooking portion and the hooked portion are provided on both sides in the width direction of the opening / closing body, A closure prevention device for an opening / closing device is provided, in which the hooked portions are provided in a staggered manner.
Further, as another configuration for quickly braking the opening / closing body, in the third invention, the hooking portion and the hooked portion are provided on both sides in the width direction of the opening / closing body, The closure preventing device for an opening / closing device is characterized in that both latching portions are provided alternately.

The hooked portion may be formed directly on, for example, a stationary part including a guide rail. However, from the viewpoint of exchanging due to corrosion, breakage, or the like, in the fourth invention, a plurality of hooked portions are opened and closed. The latch plate member formed in a tandem shape along the door is provided with respect to the immovable portion, and a closing prevention device for an opening / closing device is provided.
Furthermore, from the viewpoint of performing partial replacement of the hooked portions, in the fifth invention, the plurality of hooking plate members in which the plurality of hooked portions are formed in a column shape along the opening and closing direction are fixed. A closing prevention device for an opening / closing device is provided, which is arranged in a column with respect to the part.

Further, from the viewpoint of preventing a malfunction due to a change in the pulling direction of the pulling member with a simple structure, in the sixth invention, the hooking portion includes a fixing member fixed to the opening and closing body, and the hooked portion. A movable latching member supported by the fixed member so as to freely rotate in both directions of a latching direction in which the hook is approached and a counter-latching direction in which the hook is separated from the latched portion, and the movable latch A biasing member that biases the member to rotate in the hooking direction, and the movable latching member is pulled by the pulling member to resist the biasing force of the biasing member, A movable latch member is maintained on the counter-engagement direction side, and the movable latch member is supported by a correction arm that can rotate by freely engaging the free end side with respect to the traction member. The straightening arm moves forward as the pulling direction of the pulling member changes. An opening / closing device closing prevention device characterized in that a rotation range is regulated so that a pulling direction of the pulling member is corrected in a direction in which the movable locking member is rotated in the counter-engagement direction. .

In addition, from the viewpoint of preventing the correction arm from being damaged due to the force acting on the correction arm or the support portion of the correction arm, the tip of the traction member is fixed to the movable latch member, and the traction member is partially disposed. The portion may be inserted into the free end side of the correction arm.
According to this configuration, since the tip of the traction member is fixed to the movable latch member, the force acting on the correction arm, the support portion of the correction arm, and the like can be made relatively small. Damage to the straightening arm can be prevented.

Further, from the viewpoint of improving the ease of fastening operation of the pulling member to the movable latch member, the tip of the pulling member may be fastened to the free end side of the correction arm.
According to this structure, since the front-end | tip of a traction member is the structure fastened to a movable latching member, the fastening operation | work can be made easy.

Further, from the viewpoint of making the movable latch member and the correction arm a concrete structure with good productivity, the movable latch member is configured such that the engagement direction is a rotation direction along the opening / closing body opening direction. The straightening arm is opened and closed at the free end side of the free end side with a virtual straight line connecting the pulling base of the pulling member and the rotation center of the movable locking member as a boundary. You may arrange | position so that the range of a body closing direction side may be rotated.
According to this configuration, the movable latch member and the correction arm can have a specific structure with good productivity.

The present invention can be expected to have the following excellent effects by the above configuration.
According to the first invention, the tension of the pulling member is caused by the latching portion disposed on the opening / closing body engaging with the latching portion disposed on the stationary portion facing the latching member. Since the closing operation of the opening / closing body which is lowered and closed is braked, the braking function for the closing operation of the opening / closing body can be improved as compared with the conventional braking operation of the opening / closing body by frictional resistance.
In addition, since a plurality of latching portions are provided, when the opening / closing body is closed due to a decrease in the tension of the traction member, the latching portion engages with the nearest latching portion, so Braking can be performed quickly.

Further, according to the second aspect of the invention, since the plurality of hooked portions provided on both sides in the width direction of the opening / closing body are provided alternately, the opening / closing body is moved by reducing the tension of the traction member. When the closing operation is performed, the hooking portion is engaged with one of the two hooking portions, so that the distance of the closing operation with respect to the opening / closing body can be minimized. The opening / closing body can be braked quickly.
Further, according to the third aspect of the invention, since the two latching portions provided on both sides in the width direction of the opening / closing body are provided alternately, the opening / closing body is closed due to a decrease in the tension of the traction member. In this case, the distance of the closing operation with respect to the opening / closing body should be kept to a minimum because the latching portion with the shorter latching distance to the latched portion of the latching portions engages with the corresponding latched portion. Thus, the opening / closing body can be braked quickly.

According to the fourth aspect of the present invention, since the latch plate members in which the plurality of latch portions are formed in a tandem shape along the opening / closing direction are disposed with respect to the immovable portion, Can be exchanged.
Furthermore, according to the fifth invention, since the plurality of latching plate members, in which the plurality of latched portions are formed in a column shape along the opening and closing direction, are arranged in a column shape with respect to the stationary part, The hooked portion can be partially exchanged.

According to the sixth aspect of the present invention, when the pulling direction of the pulling member changes with the opening / closing operation of the opening / closing member, the pulling direction of the pulling member is rotated by the correction arm in the counter-engagement direction. It is corrected in the direction to make it.
Moreover, since the free end side of the correction arm is engaged with the traction member so as not to be detachable, it can be prevented that the traction member is detached from the correction arm and the movable locking member is rotated in the engagement direction.
Therefore, malfunction due to a change in the pulling direction of the pulling member can be prevented with a simple structure.

BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out a closing prevention device for an opening / closing device of the present invention (hereinafter abbreviated as “closing prevention device”) will be described with reference to the drawings.
The closing prevention device of the present embodiment opens and closes the opening / closing body by pulling the opening / closing body while pulling the opening / closing body by a flexible pulling member, and further against the pulling force of the pulling member. An example of an overhead door that is slid in the opposite direction and closed will be described.

  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.
Moreover, the side part of the vertical rail part 21 is used as the fastening surface 25 of the latching plate member 61 mentioned later.

  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, such as a metal chain or chain, a substantially string-like member or a substantially 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.

  The closing prevention device 40 includes a latching portion 5 disposed on the opening / closing body 10 side and a latched portion 6 disposed on the guide rail 20.

The latching portion 5 includes a fixing member 41 (see FIG. 2) fixed to the opening / closing body 10 side, a latching direction in which the latching portion 6 approaches the latched portion 6, and a counter-latching direction in which the latching portion 5 is separated from the latched portion 6. And a biasing member 43 that biases the movable latching member 42 so as to pivot in the latching direction. (See FIG. 3), a correction arm 44 (see FIG. 2 and FIG. 3), etc., which freely engages the free end side with the pulling member 33 and is supported rotatably with respect to the movable locking member 42. Yes.
The latching portion 5 is pulled by the pulling member 33 so that the movable latching member 42 resists the biasing force of the biasing member 43, so that the movable latching member 42 is moved to the side opposite to the latching direction. I try to keep it.

The hooked portion 6 of the present embodiment is arranged in a column shape along the opening / closing body opening / closing direction at the edge of the hooking plate member 61 made of a substantially flat plate-like metal plate whose longitudinal direction is along the opening / closing body opening direction. Are a plurality of recesses formed on the surface.
The latch plate member 61 is configured to fix the latched portion 6 to the movable latch member 42 in the direction facing the movable latch member 42 with respect to the aforementioned fastening surface 25 of the guide rail 20 such as screws, bolts and nuts. It is fastened detachably.
When the bottom side edge 6a of the hooked portion 6 is positioned at a portion of the guide rail 20 beyond the apex of the back side surface 24a of the guide surface 24, a later-described blade 42c is engaged with the hooked portion 6. In addition, damage to the guide rail 20 is prevented by making the blade 42 c in a non-contact state with the back side surface 24 a of the guide surface 24 in the guide rail 20.
In the present embodiment, the latch plate member 61 is illustrated as a detachable configuration, but the latch plate member 61 may be configured to be non-detachable by a fastening means such as a rivet or welding.

  If the latching | locking part 5 is demonstrated in detail, the fixing member 41 will be the substantially flat opening-and-closing body fixed to the opening-and-closing body 10 by fixing means, such as a screw, a volt | bolt and a nut, a rivet, or welding. Fastening portion 41a, support piece portions 41b and 41b 'provided so as to protrude from both sides of the opening and closing body fastening portion 41a in the opening and closing body thickness direction, and insertion support for these support piece portions 41b and 41b' The hollow shaft portion 41c.

  According to the illustrated example, the opening / closing body fastening portion 41a has a substantially vertical rectangular plate shape, and is provided with a plurality of fastening holes 41a1 through which fastening tools such as screws, bolts, and rivets are inserted.

Each of the support piece portions 41b and 41b ′ has a substantially triangular shape according to the illustrated example, and the movable latch member 42 rotates when the projecting end portions 41b1 and 41b1 ′ are rotated in the counter-engagement direction. The movable latch member 42 is brought into a non-engagement state with the latched portion 6 by contacting the movement regulating piece portion 42b, and the base end side portions 41b2 and 41b2 ′ of the support piece portion 41b are The movable latching member 42 is brought into a state in which it can be engaged with the latched portion 6 by contacting the movable latching member 42 with the rotation regulating piece 42b of the movable latching member 42 when rotated in the latching direction.
That is, each of the support piece portions 41b and 41b ′ regulates the rotation range of the movable latch member 42 as described above.
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 a correction arm 44 described later.

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 latching member 42 in a freely rotatable manner by inserting the movable latching member 42 through the outer peripheral surfaces on both end portions.

The movable latch member 42 has a substantially U-shaped frame-shaped movable main body portion 42a supported at the both ends thereof by the hollow shaft portion 41c, and a rotation range of the movable latch member 42 inside the movable main body portion 42a. And the aforementioned blade 42c that can be engaged with the hooked portion 6 outside the rotation restricting piece 42b.
Further, the movable hooking member 42 is provided with a pulling member stopper for fixing the leading end of the pulling member 33 so as to protrude to the most free end side in the portion of the movable main body 42a on the counter-hatch direction side. A landing part 42d is provided.
In addition, according to the example of illustration, although this movable latch member 42 is comprised by combining several metal sheet metal members suitably, it can also be comprised as an integral member.

  According to the illustrated example, the rotation restricting piece 42b is formed in a substantially flat plate shape with the protruding end facing the hollow shaft 41c, and as described above, the rotation restricting piece 42b is engaged with the support pieces 41b and 41b ′ of the fixing member 41. And is configured to engage with a biasing member 43 described later.

  The blade 42c has a substantially rectangular shape in a plan view in which a protruding end portion facing the hooked portion 6 can be fitted to the hooked portion 6, and is on the free end side of the movable main body portion 42a and faces the guide rail 20. It is fixed to the portion to be fixed by a fastening means such as a screw, bolt and nut, rivet, or welding.

Further, the biasing member 43 has a substantially coil spring shape, and one end side and the other end side of the biasing member 43 are locked to the rotation restricting piece portion 42b of the movable latching 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 biasing member 43 biases the movable latching member 42 in the latching direction relative to the fixed member 41 with the above-described configuration.

Further, the correction arm 44 is a substantially long member whose free end is detachably engaged with the support member 33 and whose base end is rotatably supported by the movable retaining member 42.
The correction arm 44 is rotated so that the pulling direction of the support member 33 is corrected in the direction of rotating the movable locking member 42 in the counter-engagement direction in accordance with the change in the pulling direction of the support member 33. The range of movement is regulated.
More specifically, the correction arm 44 has a position where the free end side is in contact with the movable main body 42a of the movable latching member 42, and the free end side is a pulling member of the movable latching member 42. The base end side is rotatably supported with respect to the movable main body part 42a so as to rotate between the position where it abuts against the fastening part 42d.

The straightening arm 44 has a midway portion inserted through the pulling member 33 on the free end side.
The correction arm 44 in the illustrated example will be described in detail. Two flat members 44a and 44a are arranged at a predetermined interval via a spacer 44b, a free end side pin 44c, and the like, and these flat members 44a and 44a. The traction member 33 is inserted 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 is used for inserting the traction member 33 into the free end side of a single member. The structure which formed this through-hole 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. 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 urges 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 a position where the blade 42c is engaged with the hooked portion 6 (the state shown in FIG. 4B).
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 action and 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. 5 shows a state in which the closing prevention device 40 is positioned 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 state A shown in FIG. 5), the traction member 33 is maintained in a substantially linear shape, and the action point x by the traction member 33 is The state is located on the base end side of the correction arm 44 (in the illustrated example, the state substantially coincides with the pulling member fixing portion 42d), and the movable locking member 42 is rotated in the counter-engagement direction by the pulling force of the pulling member 33. Maintained in the non-engaged position.
In the state A shown in FIG. 5, 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 latch 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 latching member 42 is rotated in the latching direction by the pulling force of the pulling member 33, so that the blade 42c is guided by the guide rail. 20, the movement of the closing prevention device 40 is 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. 5), the correction arm 44 moves the pulling member 33 in accordance with the change in the pulling direction and the movable main body 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 latching member 42 is maintained at the non-engagement position by the pulling force of the pulling member 33.

  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 latching member 42 from rotating in the latching 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. 5), 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 latch 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. 5, 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 latch member 42. Any position on the left side in the drawing may be used.
In other words, if the action point x is positioned on the right side of the drawing with respect to the virtual straight line P, the movable locking member 42 is rotated in the engagement direction by the pulling force of the pulling member 33, and therefore the blade 42c. Is engaged with 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. 5).
Therefore, the point of action 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 locking member. 42 is not engaged.

  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.

The form shown in FIG. 6 has shown the 2nd form of the to-be-latched part.
The hooked portion 6 ′ of the present embodiment is formed on the hooking plate members 61′L and 61′R made of a substantially flat metal plate whose longitudinal direction is along the opening / closing body opening / closing direction, and at the edge of the opening / closing body opening / closing direction. It is comprised from the several recessed part formed in the column form along.
Further, the latching plate members 61′L (see (a)) and 61′R (see (b)) respectively located on both sides of the opening / closing body width direction are the latching portions 6 with respect to the guide rails 20 and 20. It is provided so that the height position of 'is alternate.
That is, according to the latching portion 6 ′ of this embodiment, when the opening / closing body 10 is closed due to a decrease in the tension of the traction member, the latching portion 5 is latched by the latching plate members 61′L and 61 ′. Since it engages with either one of the latched parts 6 'in the' R ', the distance of the closing operation with respect to the opening / closing body 10 can be minimized. Can be quickly braked.
In this embodiment, the latching plate members 61′L (see (a)) and 61′R (see (b)) are positioned at the height of the latching portion 6 ′ with respect to the guide rails 20 and 20. However, as another embodiment having the same function and effect, the two latching portions respectively located on both sides of the opening / closing body width direction are provided as heights of the both latching portions. In this embodiment, when the opening / closing body is closed due to a decrease in the tension of the traction member, the latched portion of both the latching portions is included. Since the latching portion on the side where the engagement distance is short is engaged with the corresponding latched portion, the distance of the closing operation with respect to the opening / closing body can be minimized, and thus the opening / closing body can be braked quickly. (Not shown).

The form shown in FIG. 7 has shown the 3rd form of the to-be-latched part.
The latching portion 6 '' of the present embodiment has a latching plate member 61 '' made of a substantially flat metal plate whose longitudinal direction is along the opening / closing body opening / closing direction, along the opening / closing body opening / closing direction edge. It is comprised from several recessed part formed in the column shape.
Further, the latch plate member 61 ″ is detachably secured to the guide rail 20 in the form of a plurality of columns along the opening / closing body opening / closing direction, and is temporarily damaged by the latch portion 6 ″. When this occurs, it is possible to replace only the hooked plate member 61 ″ whose hooked portion 6 ″ is damaged.

The form shown in FIG. 8 has shown the 4th form of the to-be-latched part.
The latching portion 6 ′ ″ of the present embodiment is configured by securing a latching plate member 61 ″ ″ having a substantially plane L shape to the guide rail 20.
Specifically, one surface 61a (short side surface in the figure) of the hooking plate member 61 ′ ″ is aligned with the back side surface 24a of the guide surface 24, and the other surface 61b (long side surface in the figure) is the stop. One edge of one surface 61a of the hooked plate member 61 is attached to the back side surface 24a by being fixed along a fixing surface 25 such as a screw, a bolt and a nut, a rivet, or welding. The thickness portion on the upper end side in FIG. 4 becomes a hooked portion 6 ′ ″, and the blade 42c is engaged with such a hooked portion 6 ′ ″.
Further, when the blade 42c is engaged with the hooked portion 6 ′ ″, depending on the closing operation position of the opening / closing body 10, the blade 42c may be engaged with the hooked portion 6 ′ ″. Since the contact is made with the back side surface 24a, the closing operation of the opening / closing body 10 can be given resistance by contact.
That is, the contact resistance with respect to the back surface 24a of the blade 42 reduces the speed of the closing operation of the opening / closing body 10 and can alleviate the shock when the blade 42 engages with the hooked portion 6 ′ ″.

It should be noted that the position of the hooked portion 6 ′ ″ according to the present embodiment is such that, for example, a foot or a hand is sandwiched between the closing direction end of the opening / closing body 10 and the ground at least when the opening / closing body 10 is braked. Any position can be used as long as the gap can be secured (preferably 150 mm or more).
Further, the latching portion 6 ′ ″ of the present embodiment is configured by fastening one latching plate member 61 ′ ″ to the guide rail 20, but for example, A plurality of the hooking plate members 61 ′ ″ are aligned in the opening / closing body opening / closing direction with respect to the guide rail 20 and fixed in a column at a predetermined interval, whereby the hooking plate members 61 ′ are arranged. '' And the guide rail 20 may form a recess, and the recess may be a hooked portion 6 '''(not shown).

In addition, this invention is not limited to the illustrated form, The implementation by the structure of the range which does not deviate from the content described in each item of a claim is possible.

The perspective view of the overhead door which implemented the closure prevention device concerning the present invention. The perspective view of a latching | locking part. (3)-(3) sectional view taken on the line of FIG. It is a side view which shows operation | movement of a closure prevention apparatus, (a) shows a non-engagement state, (b) shows an engagement state. 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 other form of a to-be-latched part is shown. The other form of a to-be-latched part is shown. The other form of a to-be-latched part is shown.

Explanation of symbols

1: Overhead door (opening and closing device)
10: Opening / closing body 20: Guide rail 33: Pulling member 30: Pulling mechanism 40: Closure prevention device 61: Stopping plate member 33: Pulling member 5: Locking portion 6: Locked portion 41: Fixed member 42: Movable hook Stop member 43: Energizing member 44: Correction arm 61: Stopping plate member 42c: Blade 6 ': Locked portion 61': Locking plate member 6 '': Locked portion 61 '': Locked plate Member 6 ''': Hook 61''': Hook plate member

Claims (6)

The opening / closing body is pulled and slid by a flexible pulling member from the opening direction side, and further opened and closed, and the opening / closing body is further slid against the pulling force of the pulling member and closed. In the closing prevention device for an opening / closing device configured to brake the opening / closing body that closes when the tension of the pulling member is reduced,
A latching portion disposed on the opening / closing body engages with any one of a plurality of latching portions provided along the opening / closing direction of the opening / closing body at a stationary part facing the latching portion. Due to this, the tension of the pulling member is lowered to brake the closing operation of the opening / closing body that performs the closing operation,
The latching portion is biased in a direction to engage with the latched portion by the biasing force of the biasing means, and is not latched with the latched portion by the tension of the pulling member exceeding the biasing force of the biasing force. When the state is maintained and the tension of the traction member decreases below the biasing force of the biasing means, the latching portion is engaged with the latched portion by the biasing force of the biasing means. Closure prevention device.   The hooking portion and the hooked portion are provided on both sides of the opening / closing body in the width direction, and the plurality of hooked portions are provided alternately. The closure prevention apparatus for switchgears according to claim 1. The said latching part and the said latched part are each provided in the width direction both sides of the opening-closing body, Comprising: Both latching parts are provided so that it may become alternate. The closure prevention apparatus for switchgears described in 1.   4. A latch plate member in which a plurality of latched portions are formed in a tandem shape along the opening and closing direction is disposed with respect to a stationary part. Closure prevention device for the switchgear.   5. A plurality of hooking plate members, each having a plurality of hooking portions formed in a column shape along the opening and closing direction, are arranged in a column shape with respect to the stationary part. The closing prevention apparatus for switchgears of Claim 1. The latching portion freely rotates in both directions of a fixing member fixed to the opening / closing body, a latching direction in which the latching portion approaches the latched portion, and a counter-engagement direction in which the latching portion is separated from the latched portion. A movable latch member supported by the fixed member; and a biasing member that biases the movable latch member to rotate in the latching direction. By being pulled by the pulling member so as to resist the biasing force of the biasing member, the movable latching member is maintained on the counter-engagement direction side, and the movable latching member includes the pulling member. On the other hand, a straightening arm that is pivotably engaged with the free end side is supported, and the straightening arm has a traction direction of the traction member that changes with the change of the traction direction of the traction member. So that it is corrected in the direction of rotating in the counter-engagement direction. Range switchgear for closing prevention device according to claims 1 to 5 any one, characterized in that it is restricted.

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