JPH08260841A - Safety device for overhead door - Google Patents

Abstract

PURPOSE: To prevent sure ly a door body from falling down by itself by providing a shock absorption device for absorbing shock, when it is interlocked with an interlocking section, to an interlocking claw for preventing the fall of the door body. CONSTITUTION: A shock absorber 15 of a rubbery elastic material as a shock absorption device for absorbing shock when it is interlocked with an interlocking piece 9a of an interlocking member 9 is fixed to an interlocking claw 8 and a contact surface between the shock absorption device and the interlocking piece 9a of a claw section 8b. Then, when a suspended body 5 for suspending the lower end of a door body is cutoff to release the suspension of the door body, downward vibration is made with a second shaft 13 as a fulcrum by mutual operation between vibration with the center of gravity of a joint metal fixture 12 and energized force of a coil spring, the claw section 8b is projected by vibration of a claw body 8a in accordance with the downward vibration, and the claw section 8b is interlocked with the interlocking piece 9a, and the fall of the door body is stopped by interlocking the claw section 8b with the interlocking piece 9a, shock is absorbed by elastic deformation of the shock absorber 15, and a great bound can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for an overhead door which is installed in an opening of a building, a house, a factory, a warehouse or the like.

[0002]

BACKGROUND OF THE INVENTION Generally,
This type of overhead door is a lifting body such as a hanging wire that is wound on a winding machine installed above the opening at the end of the door pair that is guided to open and close by a guide rail installed in the opening of the body. The door body is suspended and supported by connecting the end portions of the door body, and the door body is opened and closed based on the unwinding and rewinding of the suspending body by the winding machine. In such a case, it is assumed that the door body naturally drops due to its own weight due to the cutting of the hanging body, and it is required to deal with this. The present invention has proposed that the locking claw protrudes at the time of an abnormality accompanying the cutting of the body and is locked to any one of a plurality of locking portions provided on the body side to prevent the door body from naturally falling.

This can exert great power in preventing the natural lowering of the door body, but when the protruding locking claws are locked to the locking portion, the door bodies are adjacent to each other at the maximum. There is a thing that naturally drops the distance between the stop parts.In such a case, the locking claws impact the locking part and a loud impact sound is produced.
In addition to the risk of the door body bouncing and coming off the guide rail, it is also possible that the locking claws and locking parts may be damaged and effective natural fall prevention may not be possible. There is a problem in that the size of the apparatus itself is increased and the cost is increased because consideration must be given to increasing the strength and increasing the contact area.

[0004]

SUMMARY OF THE INVENTION The present invention was devised with the object of providing an overhead door safety device capable of eliminating these drawbacks in view of the above-mentioned circumstances. The lower end of the door body, which is guided by the guide rails installed in the opening, is connected to the lower end of the lifting body that is wound around the winding machine installed above the opening, and the door is lifted. In the overhead door configured to support and unwind and unwind the door body by the winding machine of the hanging body, in the door body,
When the locking claws are provided to project on the basis of the cutting of the hanging body and are locked to the locking parts provided on the body side to prevent the door body from being naturally lowered, the locking claws are provided on the locking claws. It is characterized in that a shock absorbing means is provided for absorbing a shock when locked to.

According to the present invention, the shock absorption when the locking claw is locked to the locking portion is absorbed, and the natural lowering of the door body is reliably prevented.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a door body of an overhead door which is built in a frame opening portion, and the door body 1 is constituted by arranging a plurality of panel bodies 1a vertically and connecting them by a hinge 1b. And guide rollers 1 projecting outward from both side edges of each panel body 1a.
The c is fitted and guided by the guide rail 2 which is built in a substantially L shape from both sides of the opening to the ceiling. A winding shaft 3 is provided above the opening, and a pair of wire drums 4 is integrally provided on both sides of the winding shaft 3.
In addition, the tip of each is the lowermost panel body 1a of the door body 1.
The base end portions of the hanging body 5 such as hanging wires connected to the winding body are wound, respectively, so that the door body 1 is hung and supported by the hanging body 5. Then, the wire drum 4 is normally and reversely rotated based on the drive of the opening / closing device 6, so that the hanging body 5 is unwound and unwound, whereby the door body 1 is vertically moved. It is set to open and close the opening. In addition, 7
Is a coil ammunition that is mounted between the winding shaft 3 and the body side in a state of being balanced by the weight of the door body 1, and each of these has a conventional configuration. Here, in this embodiment, the opening and closing mechanism 3 is configured to rotate the winding shaft 3 in the forward and reverse directions. However, the driving means for the winding shaft 3 may be a manual type or a chain hoist type. But of course it is good.

In this structure, a locking claw 8 is provided on the lowermost panel body 1a, and when the hanging body 5 is cut, a long locking member 9 provided on the guide rail 2 is provided. Further, the locking claws 8 are locked to the locking pieces 9a formed at a plurality of positions in the vertical direction, whereby a safety device for stopping the natural lowering of the door body 1 is configured. . That is, the frame member 1 is attached to the lowermost panel body 1a.
0 is fastened to the bolt 10a, and a through hole 10c is formed in a substantially central portion of a side piece 10b bent from the left and right sides of the frame member 10 in a direction opposite to the door body 1 side.
A shaft portion 11 is supported through which a pawl body 8a, which constitutes the locking pawl 8 and has a pawl portion 8b formed at a lower end thereof, is swingably supported in the through hole 10c. Here, the shaft portion 11 in the present embodiment is also used as the bearing portion of the guide roller 1c, and the claw body 8a is set so as to be arranged adjacent to the door body 1 side of the guide roller 1c. Has been done. By the way, the engaging projection 11a is integrally formed on the bearing portion of the claw body 8a of the shaft portion 11.
An engaging groove 8d that is loosely fitted to the engaging convex portion 11a is formed in the through hole 8c of the shaft portion 11 of a, and when the pawl body 8a swings about the shaft portion 11 as a fulcrum, the pawl body is formed. It is set so that the rotation of 8a is restricted. Incidentally, 11b is a retaining pin, which is adapted to prevent retaining from the side piece 10b.

On the other hand, 12 is formed in a substantially L shape and has a claw body 8a.
A connecting metal fitting interposed between the holding member and the suspension body, wherein the central portion of the connecting metal fitting is oscillatably supported below the shaft portion 11 bearing portion of the side piece b. Axis 1
3 is integrally connected to the frame 3, and the connecting fitting 12 is set to be swingable with respect to the frame member 10.
A wire connecting portion 12a is integrally provided at the lower end of the connecting metal fitting 12, and an annular portion 5a at the end of the lifting body 5 is provided between the wire connecting portion 12a and the main body of the connecting metal fitting 12 and is a heavy pin. By being inserted into the shaft 12b, the connecting fitting 12 and the hanging body 5 are connected,
With this configuration, the center of gravity of the connecting fitting 12 is set to the one end side. On the other hand, a fitting recess 12c is formed at the upper end of the connecting fitting 12 and is fitted to a connecting pin 8e protruding from the inner surface of the claw portion 8b of the claw body 8a. The claw body 8a is configured to swing about the shaft portion 11 as a fulcrum following the swing about the fulcrum 13 as a fulcrum. It is inserted into an elongated hole (not shown) formed in 10b, and when the connecting fitting 12 swings, the claw 8a swings with the connecting pin 8e being guided by the elongated hole. . Further, the second shaft 13 has one end on the frame material side piece 10b and the other end on the second shaft 1.
Coil ammunition 14 fixed to each of 3 is mounted, and is set so as to urge the connecting fitting 12 in a direction of swinging downward.

[0009] When the connecting fitting 12 is suspended and supported by the suspension body 5, the coil ammunition 14 is used.
It is supported by the hanging body 5 in a state of being opposed to the door body, and at this time, the connecting piece 12 has a stopper piece 12d protruding from the lower part toward the door body 1 side and abutting against the lower surface of the door body 1. 1 is lifted, and in this state, the claw body 8a is set such that the claw portion 8b is located below. From this state, the lifting body 5 is cut,
When the hanging support of the connecting metal fitting 12 by the hanging body 5 is released, the connecting metal fitting 12 moves the second shaft 13 by the interaction between the swinging by the center of gravity of the connecting metal fitting 12 and the urging force of the coil ammunition 14. It swings downward as a fulcrum, and following this, the claw 8a swings so that the claw 8b projects. In this state, the claw 8b is locked to the locking piece 9a. It is set.

By the way, the locking claw 8 is provided with a shock absorbing means for absorbing a shock when locking to the locking piece 9a of the locking member 9. In the one embodiment, the impact absorbing material 15 made of a rubber elastic material such as a hard rubber material or a soft rubber material having elasticity is fixed to the contact surface portion of the claw portion 8b with the locking piece 9a. ,by this,
The impact absorbing material 15 is elastically deformed when impacted with the locking piece 9a to absorb the impact. As a method of fixing the shock absorbing material 15, a dovetail groove fitting method may be used as in the embodiment, but it is also possible to use an adhesive agent, an adhesive material, or a fixing tool such as a screw. There is no end.

In the embodiment of the present invention constructed as described above, the door body 1 of the overhead door is moved up and down based on the drive of the opening / closing machine 6 to open and close the opening, but the lower end of the door body 1 is opened. In the case where the hanging body 5 that suspends the part is cut and the hanging of the door body 1 is released, the locking claw 8 is released based on the downward swing of the connecting fitting 12 as described above. Since the claw portion 8b projects toward the locking member 9 and the claw portion 8b locks on the locking piece 9a, the natural lowering of the door body 1 is stopped. In this case, the locking claw 8 is provided with a shock absorbing material 15 on a contact surface portion of the claw portion 8b with which the locking piece 9a is abutted, which is a portion that receives a shock when the locking claw 8 abuts. As a result, it is possible to absorb the impact when the claw portion 8b and the locking piece 9a come into contact with each other and also prevent the claw portion 8b from being greatly bounced. It is not necessary to increase the strength of these member devices so as to prevent the locking piece 9a from being damaged and being unable to stop the natural descent, and it is possible to achieve a lightweight and compact structure.

Further, in this structure, since the shock absorbing material 15 is provided on the contact surface portion of the claw portion 8b with the locking piece 9a, the frictional force of the claw portion 8b against the locking piece 9a is increased. In addition to preventing slippage, the impact absorbing material 15 is deformed so that the claw portion 8b comes into contact with the engaging piece 9a in a state of biting into the engaging piece 9a, thereby improving the disengagement prevention function.

Incidentally, the present invention is not limited to the above-mentioned embodiment, but can be applied to the second embodiment shown in FIG. That is, in this structure, a shock absorbing means is provided in the frame member 10 for supporting the shaft portion 11 that supports the pawl 8a. Therefore, in the second embodiment, the through holes of the frame member both side pieces 10b are formed. A notch 10d is formed in the upper portion of 10c, and a shock absorbing material 15 made of a member weaker than the frame material 10 such as a rubber elastic material or hard plastic is fitted into the notch 10d portion. And
When the claw portion 8b collides with the locking piece 9a due to the natural lowering of the door body due to the cutting of the hanging body 5, the shaft portion 11 has the through hole 10c.
Although the impact force in the thrusting direction is applied to the upper part of the, the impact absorbing material 15 is set to be elastically absorbed or broken and absorbed as a fragile portion. That is, in this structure, the door body is allowed to fall naturally by the locking piece 9 of the claw body 8a.
Although it will be stopped by receiving at a, in that case, the impact absorbing material 15 acts as a fragile portion where the impact absorbing material 15 concentrates and deforms or breaks, resulting in protection of other members. This contributes to weight reduction and compactness. When forming such a fragile portion, the frame material 1 can be formed without using the shock absorbing material 15 separately as in the second embodiment.
It is also possible to form 0 itself. As a means for forming such a fragile portion, as in the third embodiment shown in FIGS. 7 and 8, a portion corresponding to the notch 10d is thinned to form the fragile portion 10e, or shown in FIG. As in the case of the fourth embodiment, a plurality of holes 10 are formed in the portion corresponding to the cutout 10d.
There is one in which f is provided.

[0014]

In summary, since the present invention is constructed as described above, the suspension support of the door body is released by cutting the suspension body for suspending the lower end of the door body. Based on this, the protruding locking claws are locked to the locking part to stop the door body from naturally descending. However, the locking claws have a shock to absorb the shock at the time of contact with the locking part. Absorbing means is provided to absorb the impact at the time of contact and prevent the locking claws from bouncing greatly. As a result, the door body is disengaged from the guide rail and the locking claws and locking It is not necessary to increase the strength of the member device so as not to prevent the parts from being damaged and the natural descent stop being prevented.

[Brief description of drawings]

FIG. 1 is a front view of an overhead door.

FIG. 2 is a side view of a safety device.

FIG. 3 is a front view of a safety device.

FIG. 4 is a plan view of the safety device.

FIG. 5 is a side view illustrating the action of the claw body.

FIG. 6 is a side view of the locking claw of the second embodiment.

FIG. 7 is a side view of a locking pawl according to a third embodiment.

FIG. 8 is a front view of a locking claw according to a third embodiment.

FIG. 9 is a side view of a locking pawl according to a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door body 1c Guide roller 2 Guide rail 3 Winding shaft 4 Wire drum 5 Lifting body 5a Annular part 6 Opener 8 Locking claw 8a Claw body 8b Claw part 9 Locking member 9a Locking piece 10 Frame member 10e Weak part 11 Shaft 12 Coupling 14 Coil ammunition 15 Shock absorber

Claims (7)

[Claims] 1. A tip end of a suspension body wound by a winding machine disposed above the opening is connected to a lower end of a door body which is opened and closed by a guide rail built in the opening of the body. In the overhead door, the door body is hung and supported, and the door body is opened and closed by a winding machine and the door body is opened and closed. When the locking claws are provided to project on the basis of the cutting of the body and are locked to the locking parts provided on the body side to prevent the door body from naturally falling, the locking claws are engaged with the locking parts. A safety device for an overhead door characterized in that shock absorbing means for absorbing shock when stopping is provided. 2. The safety device for an overhead door according to claim 1, wherein the shock absorbing means is an elastic material integrally provided at a locking portion contacting portion of the locking claw. 3. The safety device for an overhead door according to claim 1, wherein the shock absorbing means is formed on a shaft supporting portion that pivotally supports a swinging supporting shaft of the locking claw. 4. The safety device for an overhead door according to claim 3, wherein the shaft support portion is configured to weaken the upper part of the swing support shaft to absorb impact. 5. The safety device for an overhead door according to claim 4, wherein the shaft supporting portion is made thin to be fragile. 6. The safety device for an overhead door according to claim 4, wherein the shaft support is perforated to make it weak. 7. The safety device for an overhead door according to claim 3, wherein the shaft support portion is a vertically elongated hole, and an elastic member is interposed in the elongated hole to absorb impact.