JP3416788B2 - Overhead door safety device - Google Patents

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 installed in an opening of a building such as a building, a house or a factory warehouse.

[0002]

BACKGROUND OF THE INVENTION Generally,
This kind of overhead door is constructed by connecting a lifting body extended from a winding machine arranged above the opening to the lower end of the door body which is guided to be opened and closed by a guide rail built in the opening of the body. The door body is opened and closed by rewinding and winding the body from the winding machine.

In such an overhead door, it is required to prevent the door body from naturally dropping due to the weight of the door body due to cutting of the hanging body.
He once proposed what is disclosed in Japanese Patent Publication No. Gazette and was able to exert a proper fall prevention function. By the way, in this product, the locking claw that is pivotally supported on the door body is rocked by the urging force of the ammunition due to the tension loss due to the cutting of the lifting body, and then locked to the locking part on the body side. This locking claw is connected to the operating arm that is swingably provided on the door body, and in normal times, the tension is applied by the weight of the door body of the lifting body connected to the operating arm. The locking claw is set so as to be maintained in the releasing posture against the biasing force of the ammunition.

However, among such overhead doors, there is one in which the storage rail for storing the door body in a fully opened state is horizontal, and in this type, as the door body approaches a horizontal posture in which it is fully opened, the door body is closed. The tension direction of the lifting body with respect to the vertical direction changes from the vertical direction to the inclination direction, and the tension direction of the lifting body that receives the weight of the door body deviates from the direction in which the locking claws are maintained in the release posture. There is a problem that the force for maintaining the locking claw in the released posture becomes small and the locking claw receives the urging force of the ammunition and swings toward the locking posture side. The actual situation was that it could be stored only to the extent that it could not be transformed into the locked posture.

[0005]

The present invention SUMMARY OF THE INVENTION It is an the <br/> a creation for the purpose of providing a safety device for overhead doors that can wipe out these drawbacks in view of the such circumstances the Therefore , the invention of claim 1 is built in the frame opening, and is provided with a vertical rail, a corner rail, and a horizontal rail.
The lower end of the door body, which is guided to open and close by the configured guide rail, is connected to the leading end of the suspension body that is wound on the winding machine disposed above the opening to support the suspension of the door body. In an overhead door configured to open and close the door body when the hanging body is unwound by a winding machine and unwound, the door body is locked to a locking portion provided on the body side. A locking pawl swingably supported so that it can be transformed between a locking position and a releasing position where the locking is released, and a bullet that urges the locking claw toward the locking position. Machine, one end side is connected to the hanging body, the other end side is linked to the locking claw, and the locking claw is released against the ammunition by the vertical tension that receives the weight of the lifting body on the door body side And the swinging of the locking claw to the locking posture side is allowed by receiving the biasing force of the ammunition due to the disappearance of the tension accompanying the cutting of the hanging body. Only set a movement arm, the said actuating arm, hanging has body door body becomes horizontal position closer to the fully opened state
When providing the avoidance means for avoiding that the tension direction of the lifting body with respect to the actuating arm is directed in the direction that transforms the locking claw into the locking posture when the tension of The avoiding means has a base end swingably supported on one end of the operating arm and an auxiliary arm to which a lifting body is connected at the distal end, and the tension direction of the lifting body transforms the locking claw into a locking posture. A guide that swings and guides the auxiliary arm in the hanging body direction by interfering with the auxiliary arm without swinging in a direction in which the locking claws of the operating arm are transformed into the locked posture as they move in the direction. It is a safety device for an overhead door characterized by being configured with a member. The invention of claim 2 is installed in a frame opening, and is provided with a vertical rail, a corner rail, and a horizontal rail.
The lower end of the door body, which is guided by the guide rail composed of a door, is connected to the tip of the suspension body that is wound around the winding machine installed above the opening, and supports the suspension of the door body. In the overhead door configured to open and close the door body by unwinding and rewinding the hanging body by a winding machine, the door body is engaged with a locking portion provided on the body side. A locking pawl swingably supported so that it can be transformed between a locking posture to stop and a releasing posture to release the locking, and a biasing force to the locking pawl toward the locking posture side. And the one end of the suspension is connected to the suspension, the other end is connected to the locking claw, and the locking claw is resisted against the ammunition by the vertical tension that receives the weight of the suspension body on the door body side. Holds in the released position, and swings by receiving the urging force of the ammunition due to the tension loss associated with the cutting of the lifting body, allowing the locking claw to swing toward the locking position. That set the operating arm only, to the actuation arm, retention hanging the door body becomes horizontal position close to the fully open state
When the body tension changes from the vertical direction to the tilt direction, the avoidance means for avoiding the direction of the tension of the lifting body with respect to the operating arm in the direction of changing the locking claw into the locking posture is provided. The avoiding means is a flexible member interposed between one end of the operating arm and the suspension body, and a support integrally provided on the door body side, which is located on the winding machine side of the flexible member. When the suspension body tension direction is changed to the direction in which the locking claw is transformed into the locking posture, the intermediate portion of the flexible member is locked to the support body in a curved shape, and the operating arm Is a safety device for an overhead door, characterized in that it is configured so as to avoid facing the direction in which the locking claw is transformed into the locking posture.

According to the present invention, the locking claw can be maintained in the releasing posture even when the tension direction of the suspension body with respect to the operating arm changes.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one 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, and the door body 1 is formed by connecting a plurality of panel bodies 1a in a vertical direction in series via hinges 1b. Although it is one, each panel body 1a
Mounting members 2 are provided on both left and right edge portions of the guide roller 2a, and the guide roller 2a is supported while protruding outward. The door body 1 is fitted to a substantially L-shaped guide rail 3 including a vertical rail 3a, a corner rail 3b, and a horizontal rail 3c, on which the guide rollers 2a are built from both sides of the opening of the body to the ceiling. Although the opening is opened and closed by being guided together, the left and right edges of the lowermost panel body 1a of the door body 1 constitute a winding shaft above the opening as will be described later. 4 is connected to one end of a suspension body 6 respectively wound around wire drums 5 provided on both sides and supported by suspension, and the suspension body 6 is wound up based on a driving force of an opening / closing machine 7. The door body 1 moves up and down by unwinding and unwinding from the wire drum 5 as the shaft 4 rotates,
It is set so as to be transformed into a fully opened posture in which it is housed horizontally in the horizontal rails 3c and a closed posture in which the vertical rails 3a on both sides of the opening are erected. Furthermore, 8 is the winding shaft 3
It is a coil ammunition that is mounted in a state of being balanced by the weight of the door body 1 between the main body side and the body side.

In this structure, a safety device for stopping the fall of the door body 1 when the hanging body 6 is cut is provided. The safety device is provided on the lowermost panel body 1a. The locking claws 9 are locking pieces 10 formed at a plurality of vertical positions of a long locking member 10 provided on the vertical rail 3a.
It is configured to stop falling when locked to a. That is, the frame member 11 is integrally fixed to the left and right edge portions of the lowermost panel body 1a.
The shaft portion 12 is pierced and supported in a through hole 11b formed in the side piece 11a projecting toward the indoor side in a retaining shape, and the guide roller 2a is rotatably supported at the tip portion of the shaft portion 12. However, the locking claw 9 is pivotally supported so as to be adjacent to the inside of the guide roller 2a. An operating pin 9b, which is arranged parallel to the shaft portion 12, is integrally formed on the locking claw 9, and a coil-shaped bullet inserted between the operating pin 9b and the side piece 11a. The locking claw 9 is urged by the urging force of the machine 13 toward the locking posture side in which the claw portion 9a locks with the locking piece 10a.

Reference numeral 14 is an operating arm connected to the locking claw 9. The intermediate portion of the operating arm 14 has a frame member 1
The left and right outer side plates 11a of FIG. 1 are rotatably supported by a substantially U-shaped mounting member 15 via a support shaft 14a.
b is formed, and the operating pin 9b is movably fitted and locked in the concave groove 14b, while the connecting pin 16 projecting from the base end of the operating arm 14 is a circle formed in the mounting member 15. It is movably fitted in the arc-shaped long hole 15a. Then, as the connecting pin 16 moves from one end of the elongated hole 15a to the other end, the operating arm 14 swings around the support shaft 14a as a fulcrum, whereby the locking claw 9 is locked by the claw 9a. It is set so as to swing and transform into a locking posture in which it is locked to the piece 10a and a releasing posture in which it is unlocked.

On the other hand, a base end portion of a connecting piece 17 is swingably supported by the connecting pin 16, and a distal end portion of the connecting piece 17 and an annular portion 6a formed at a leading end portion of the hanging body 6 are provided. The suspension body 6 and the operation arm 14 are connected by being fixed. In this state, the suspension body 6 is in a tension state in which it receives the weight of the door body 1, and in this case, the operating arm 14 receives the tension of the suspension body 6 and the connecting pin 16 has a long hole. It is located at the other end of 15a and is in a normal state in which the locking claw 9 swings against the ammunition 13 so that the locking claw 9 is in the releasing posture, but the tension by the lifting body 6 is caused by cutting the lifting body 6 or the like. Is lost, the locking claw 9 swings toward the locking posture by the urging force of the ammunition 13, and the claw portion 9a
Is set to project and to be locked to the locking piece 10a.

By the way, the door body 1 includes the lowermost panel 1a.
Runs from the vertical rail 3a to the corner rail 3b and is in a fully opened state. In this case, the tension direction received by the connecting piece 17 by the lifting body 6 is directed from the upward direction to the inclined direction in which the outdoor side is inclined upward. The tension applied to the actuating arm 14 from the lifting body 6 becomes smaller due to the gradual change, and the locking claw 9 receives the urging force of the ammunition 13 to swing toward the locking posture. The safety device in which the above-mentioned step is executed is provided with a stopper member 18 for restricting this swinging. That is, as the door body 1 approaches the fully opened state and the tension direction of the suspension body 6 becomes inclined, the connecting piece 1
7 swings in the direction of arrow A with the connecting pin 16 as the fulcrum with the connecting pin 16 positioned at the other end of the elongated hole 15a.
The stopper member provided integrally with the mounting member 15 at a stage before the swinging direction of the swinging body 6 coincides with the arm length direction of the operating arm 14 located on the proximal end side of the connecting piece 17. The connecting piece 17 is in contact with the contact member 18 so as to be restricted, whereby the operation arm 14 is locked when the door body 1 is fully opened and the tension of the suspension body 6 is directed in the tilt direction. The swinging to the posture side is avoided and the posture is maintained in the released posture.

In the embodiment of the present invention constructed as described above, as described above, the door body 1 of the overhead type door is opened and closed based on the unwinding and rewinding of the six hanging bodies. During a normal operation in which the holding body 6 is suspended and supported, the locking claw 9 is in a releasing posture against the coil ammunition 13, and a normal opening / closing operation in which the locking with respect to the locking piece 10a is released is performed. However, if the suspension 6 is cut in this state and the tension on the operating arm 14 disappears, the ammunition 13
The claw portion 9a of the locking claw 9 which is forcibly rocked by receiving the urging force is locked to the locking piece 10a, whereby the door body 1 can be prevented from falling.

As described above, in the embodiment of the present invention, the door body 1 can be prevented from falling. However, in the normal operating state, the locking claw 9 is provided even when the door body 1 is in a nearly fully opened state.
Does not swing toward the locking position due to the urging force of the ammunition 13. That is, when the door body 1 is in a state of being almost fully opened and the tension of the hanging body 6 is in the inclined direction, the connecting piece 17 that tries to swing following this is in contact with the stopper member 18 and thereafter. The swinging is restricted, whereby the actuating arm 14 is maintained in the state of receiving the tension of the lifting body 6, and the actuating arm 14 together with the locking claw 9 is in the ammunition 13.
It does not transform into the locking position due to the urging force of. As a result, the open position of the door body 1 can be set to a position as high as possible, and a high effective height of the opening can be secured.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and as an avoiding means for avoiding the locking claw from changing into the locking posture when it is close to the fully opened state, Alternatively, the second embodiment shown in FIGS.
This one has an actuating arm 19 having a substantially L-shape, and the actuating arm 19 pivotally supports a bent portion through a support shaft 19a, one end of which is connected to the lifting body 6, while the other end of which is connected. The locking claw 9 is connected to the portion. In this structure, the actuating arm 19 supports the support shaft 9a with respect to the imaginary line X indicating the tension direction of the lifting body 6 when the door body 1 is in the fully opened posture.
The imaginary line Y that connects the holding body connecting position and the hanging body connecting position is arranged on the mounting member 15 so as to be in a gently inclined state. With this configuration, the tension direction of the hanging body 6 is the tilting direction. Even if the change is changed to, the tension direction of the operating arm 19 with respect to the locking claw 9 does not change, and the locking claw 19 maintains the releasing posture. Further, the third embodiment shown in FIGS. 8 and 9 may be used, but in this embodiment, the flexible member 20 is interposed in the connecting portion between the actuating arm 14 and the lifting body 6, and the flexible member 20 is further flexible. The structure is the same as that of the first embodiment except the support 21 provided on the lowermost end panel body 1a that supports the hanging body side 6 side of the elastic member 20. Then, in this structure, the intermediate portion of the flexible member 20 is locked by the support 21 as the tension direction of the lifting body 6 changes to the direction in which the locking claw 9 is transformed into the locking posture, and the curved shape is formed. Therefore, the locking claw 9 can be maintained in the released posture state without changing the tension direction with respect to the actuating arm 14. Even in this case, the same effect as in the above embodiment can be obtained. it can.

[0015]

In summary, since the present invention is constructed as described above, the actuating arm of the safety device has the locking claw that locks the locking claw when the tension is lost due to the cutting of the lifting body. To prevent the door body from falling by swinging and transforming it from the unlocked position where it is not locked with and to the locked position that receives the urging force of the ammunition, this operating arm is provided with the avoidance means,
When the door body approaches the fully opened state and the tension of the lifting body becomes the tilt direction, the locking claw is prevented from going toward the locking posture side, and the operating arm receives the tension of the lifting body. As a result, the door body is maintained as it is, so that the opening posture of the door body can be set to a position as high as possible, and the effective height of the opening can be secured high.

[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 plan view of a safety device.

FIG. 4 is a side view showing an operating state of the safety device.

FIG. 5 is a side view showing the safety device in a fully opened state.

FIG. 6 is a side view of a safety device according to a second embodiment.

FIG. 7 is a plan view of a safety device according to a second embodiment.

FIG. 8 is a side view of a safety device according to a third embodiment.

FIG. 9 is a plan view of a safety device according to a third embodiment.

[Explanation of symbols]

1 door body 2a Guide roller 3 guide rails 3b corner rail 6 hanging body 9 locking claws 9a Claw 10 Locking member 11 frame members 12 Shaft 13 ammunition 14 Working arm 15 Mounting member 15a long hole 16 connecting pins 17 Connecting piece 18 Stopper member

Continuation of the front page (56) References Kaikai Hei 2-27498 (JP, U) Real Kohei 5-1600 (JP, Y2) Real Kohei 4-221 (JP, Y2) Real Kohei 2-42873 (JP , Y2) (58) Fields investigated (Int.Cl. ⁷ , DB name) E06B 9/00

Claims (2)

(57) [Claims] 1. A vertical rail,
The lower end of the door body, which is guided by the guide rail composed of the inner rail and the horizontal rail, is connected to the lower end of the door body, which is connected to the tip end of the suspension body wound on the winding machine disposed above the opening. Suspending support, unwinding the suspension by a winding machine,
In an overhead door configured to open and close the door body with rewinding, a locking posture for locking a locking portion provided on the body side of the door body and a releasing posture for releasing the locking. A locking pawl swingably supported so that it can be transformed between the and, a bullet that urges the locking pawl toward the locking position, and one end of which is connected to the lifting body, The end side is linked to the locking claws and faces the vertical direction when it receives the weight of the hanging body on the door body side.
Ku against the locking pawl to bullet machine by the tension held in the release position,
Setting an actuation arm to permit swinging of swings by receiving urging force bullet machine at a tension loss due to the cleavage of the hanging has body into locking position side of the locking pawl only, the actuation arm, the door body Is close to full open
In a horizontal position, the tension of the lifting body tilts from the vertical direction.
In the case of providing the avoiding means for avoiding the direction of the tension of the lifting body with respect to the actuating arm in the direction of changing the locking claw to the locking posture when the holding body is oriented, Is pivotally supported at one end of the operating arm and has an auxiliary arm to which a lifting body is connected at the tip, and as the lifting body tension direction changes to a direction in which the locking claw is transformed into a locking posture,
A guide member that interferes with the auxiliary arm and swings and guides the auxiliary arm toward the hanging body without swinging in a direction in which the locking claw of the operating arm is transformed into the locked posture. A safety device for overhead doors. 2. A vertical rail,
The lower end of the door body, which is guided by the guide rail composed of the inner rail and the horizontal rail, is connected to the lower end of the door body, which is connected to the tip end of the suspension body wound on the winding machine disposed above the opening. Suspending support, unwinding the suspension by a winding machine,
In an overhead door configured to open and close the door body with rewinding, a locking posture for locking a locking portion provided on the body side of the door body and a releasing posture for releasing the locking. A locking pawl swingably supported so that it can be transformed between the and, a bullet that urges the locking pawl toward the locking position, and one end of which is connected to the lifting body, The end side is linked to the locking claws and faces the vertical direction when it receives the weight of the hanging body on the door body side.
Ku against the locking pawl to bullet machine by the tension held in the release position,
Setting an actuation arm to permit swinging of swings by receiving urging force bullet machine at a tension loss due to the cleavage of the hanging has body into locking position side of the locking pawl only, to the actuating arm, the door body Is close to full open
In a horizontal position, the tension of the lifting body tilts from the vertical direction.
When providing the avoidance means for avoiding that the tension direction of the lifting body with respect to the actuating arm is oriented in the direction in which the locking claw is transformed into the locking posture when it is oriented, the avoidance means is
A flexible member interposed between one end of the operating arm and the suspension body, and a support body located on the winding machine side of the flexible member and integrally provided on the door body side. As the tension direction of the lifting body changes to the direction in which the locking claw is transformed into the locking posture, the intermediate portion of the flexible member is locked to the support body in a curved shape, and the operating arm locks the locking claw. A safety device for an overhead door, characterized in that it is configured so as not to face in a direction in which it is transformed into a locked posture.