JPH0634537Y2 - Overhead door fall prevention device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a door fall prevention device for an overhead type door having a movable center pillar, and more specifically, a side-by-side door is lifted to move the movable center pillar. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhead door fall prevention device that prevents a door that has moved from a predetermined position from dropping abnormally.

[Conventional technology]

Overhead doors generally balance the doors so that the raised doors prevent and retain the effect of constantly lowering the door due to its own weight. However, there is a problem in that the door may be dropped due to an erroneous operation without setting the movable center column at a predetermined position, and as a result, the door may fall without being guided by the guide rail of the movable center column, which is dangerous. It was Further, the balancer may be broken due to breakdown or damage of the balancer, or the influence of wind pressure, earthquake, or other external force, and an unexpected drop of the door may occur at an unexpected time, requiring a safety device.

In view of the above circumstances, as a conventional fall prevention device for an overhead door equipped with a movable center pillar, for example, Jikken Sho 57-
59585 was developed. This fall prevention device is constructed as shown in FIGS. 4 and 5.

A removable movable pillar 1 is provided at an intermediate position of the front opening, and a horizontal rail 2 having a fall prevention device A'is provided on an upper body B'of the movable pillar 1. More specifically, the movable pillar 1 is provided with vertical rails 1a, 1a for fitting the rollers C'a, C'a of the doors C ', C'on both sides of the movable pillar 1, and the movable rails 1a, 1a are mounted in the center by a link mechanism. The pillar 1 is provided with a hollow protrusion 1b protruding and retracting from the upper end thereof. On the other hand, as shown in FIG. 5, the horizontal rail 2 is fixed at a distance X from the skeleton B ′ via an angle member 3, and the lower end of the horizontal rail 2 is provided with a back plate 4 so that the protrusion 1b is hollow. Guide shaft 5 that fits loosely
And a pressing weight 6 which is loosely fitted on the guide shaft 5 so as to be able to move up and down, and pivotally attached to both sides of the pressing weight 6 so as to be swingable, respectively, and formed by bending the operation portion 7a and the locking claw 7b. Stopper 7,
7 to form a fall prevention device A '. The reference numerals 8 and 8 are the stoppers 7 and 7 formed on the side plate of the horizontal rail 2.
This is an opening for the locking claws 7b, 7b to appear and disappear.

The fall prevention device A'constructed as described above operates as follows. The state shown by the phantom line in FIG. 4 is when the doors C ′, C ′ are lowered, the protrusion 1b of the movable column 1 is projected, and the pressing weight 6 is moved upward, and the operation parts of the stoppers 7, 7 are shown. 7
By pressing a and 7a, the locking claws 7b and 7b protruding in the horizontal rail 2 are retracted, and the rollers C'a and C'a of the doors C'and C ',
It allows the passage of C'a. Further, contrary to the above, when the protrusion 1b of the movable column 1 is retracted, the pressing weight 6 descends, so that the stoppers 7, 7 which were in the state of imaginary lines in FIG. The locking claws 7b, 7b project into the rails to prevent the doors C ', C' from falling.

[Problems to be solved by the invention]

However, the conventional overhead doors described above are available in various forms in which the doors are designed differently depending on the building conditions such as the height of the front opening and the ceiling height, and the inclination angle of the horizontal rail is different. As a result, the horizontal rail mounting position differs depending on the building conditions in terms of the distance from the frame, and the mounting position of the movable pillar that operates the fall prevention device mounted on the horizontal rail directly below will also change accordingly, and each overhead door There is a problem in that it takes a lot of time and effort for designing in consideration of the above distance, and there is also a troublesome work such as a troublesome mounting work.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide an overhead door fall prevention device that can always set the mounting position of a movable center pillar to a fixed position without being influenced by the form of a horizontal rail. It is a specific subject.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides an overhead type door in which a movable center pillar is provided at an intermediate position of a front opening, and a horizontal rail is provided on a body side above the mounting position of the movable middle pillar. A slide body having a tip projecting to the horizontal rail side above the center pole mounting position and moving up and down by the operation of a push-up rod provided in the movable center pole;
From a locking member that is attached to the upper body side of the movable center pillar so as to be movable back and forth, and that interlocks with the vertical movement of the slide body to prevent the doors located on both sides of the horizontal rail from falling down. The fall prevention device for an overhead door is equipped with the fall prevention device.

[Action]

According to the present invention, on the upper skeleton side of the mounting position of the movable center pillar, a locking member that is movable back and forth by a distance corresponding to the distance between the skeleton and the horizontal rail is mounted so as to be retractable in the horizontal rail. Therefore, if a movable center pillar is attached and the push-up rod is moved upwards, and the slide body whose tip is projected toward the horizontal rail is moved upwards, the slide body can be moved upwards regardless of the form of the horizontal rail. When the door is engaged and the locking member is activated, the door is retracted from the horizontal rail and the door can be raised and lowered freely.
In contrast to the above, if the push-up rod is retracted and the slide body is moved downward, the engagement between the locking member and the slide body is released and the locking member projects into the horizontal rail, preventing the door from falling. Will be prevented.

As described above, even when the horizontal rails of various forms having different distances between the frame and the horizontal rails are adopted, the movable center pillar can be always attached at a fixed position.

〔Example〕

An embodiment according to the present invention will be described with reference to the drawings. FIG. 1 is a front view of a fall prevention device when a movable center column is attached and operated, FIG. 2 is a side view of the fall prevention device, and FIG. 3 is a side view of the movable center column and a horizontal rail. .

In this embodiment, the overhead door is provided with guide rails (not shown) having a vertical portion and a horizontal portion formed in series on both sides of the front opening D, and an upper frame B at an intermediate position of the front opening D is attached to the upper frame B. The rail portions 20a, 20a are formed on both sides, and as shown in FIG. 3, the horizontal rail 20 formed on the same locus as the horizontal portion of the guide rail is fixedly mounted via a rail mounting member 21. Further, a movable center pillar 10 having vertical rails 13, 13 communicating with the rail portions 20a, 20a of the horizontal rail 20 mounted on both sides is provided directly below the horizontal rail 20 so as to be movable in the width direction of the front opening D. There is. Then, the doors C and C, which are connected to each other by installing rollers Ca on both sides of each panel, are fitted on both sides with the movable center pillar 10 as a boundary, and various types such as electric type, chain type, and balance type are used. Doors C and C can be raised and lowered freely.

The movable center pillar 10 has an outer frame 11 facing the outside of the building, a rod guide 12 attached to the center of the outer frame 11 so as to face the inside of the building, and is attached to the rod guide 12 and goes upward. Along with that, it is composed of vertical rails 13, 13 that are inclined inward of the building and are installed in two rows opposite each other. And the above rod guide 1
A link mechanism is operated in the inside of 2 by the operation of an external lever (not shown), and a push-up rod 14 is formed at the upper end and a set arm 15 is formed at the lower end at the same time. As a result, the set arm 15 is attached to the floor side base plate.
The push-up rod 14 is inserted into an insertion hole 23 formed in a bottom plate 22c of a mounting member 22, which will be described later, mounted on the upper frame B side so as to mount the movable center pillar 10 at a fixed position. .
Since the push-up rod 14 of the movable center pillar 10 is supported by the member on the body side, the wind pressure resistance is improved. Further, slide plates 16 and 16 that are projected and retracted in association with the operation of the external lever are attached to the upper and lower portions of the outer frame 11. Further, a hanger roller 17 is attached to the upper portion of the outer frame 11, and the lower end portion of the skeleton B is cut out across the width direction of the front opening D to be fitted into a hanger rail 19 attached to the stepped portion thereof, so that the movable center pillar is movable. The whole 10 is movable.

The fall prevention device A is configured on the side of the horizontal rail 20 as follows. A mounting member 22 is fixedly attached to the upper frame B surface of the front opening D, and a back plate 22a formed to have a width length substantially equal to the distance between both rail portions 20a of the horizontal rail 20.
Is attached to the skeleton B, side plates 22b and 22b are attached to both sides thereof, and a bottom plate 22c having a tip penetrating between the rail portions 20a and 20a and protruding toward the inside of the building is attached to the lower portion. An insertion hole 23 through which the push-up rod 14 of the movable center pillar 10 goes in and out is formed on the base end side of the bottom plate 22c. Further, a support body mounting member 22d having a U-shape in a side view and having a slide hole for inserting a later-described slide flat plate 24a is attached to an upper portion between the side plates 22b, 22b. Then, the mounting member 22 has a slide flat plate 24a inserted into the slide hole of the support mounting member 22d, and an arm 2 that is attached to a lower portion of the slide flat plate 24a and projects substantially the same length as the bottom plate 22c of the mounting member 22.
The slide body 24 composed of 4b is positioned. An L-shaped actuating plate 24c having a length extending from the distal end side to the substantially proximal end side is attached to the upper portion of the arm 24b. In addition, a long bolt 25 is attached to the upper part of the slide flat plate 24a so that the attachment member 2
A tension coil spring 27 that urges the entire slide body 24 downward is hooked between the second support body mounting member 22d and the pin 26 that projects. The action of the tension coil spring 27 ensures the return of the slide body 24 that moves downward in conjunction with the downward movement of the push-up rod 14.

On the other hand, the support member 22d has a locking member E as described below. A support 28 having a U-shaped cross section is horizontally projected from the support attachment member 22d toward the inside of the building,
Two long holes 28a are formed in the bottom of the support body 28 in the front-rear direction, that is, the longitudinal direction, and the locking members E are mounted in a suspended manner via hexagon socket bolts 29, 29, respectively. Further, the locking member E constitutes the moving body 30 and the stoppers 31, 31, and the flat plate-shaped moving body 30 is provided with two female screw portions screwed with the hexagon socket head cap screws 29, 29. Further, stopper mounting portions 30a, 30a for mounting the stoppers 31, 31 are formed on the lower surfaces of both sides. The stoppers 31 and 31 have substantially Z-shaped ends extending in opposite directions at the upper and lower bent portions.
Both stoppers 31 and 31 are arranged in line symmetry, and the upper bent portions are respectively attached to the stopper mounting portions 30a and 30a by the pins 32 and 32, respectively.
Also, it is pivotally supported via a retaining ring. The upper side portions 31a, 31a of the stoppers 31, 31 are formed to be thin from an intermediate position and are in an overlapping shape. 31a ′
The pins are arranged in a horizontal straight line and are balanced so as to be positioned below the positions of the pins 32, 32. Also, the lower ends of the rail portions 20a, 20a of the horizontal rail 20 are notched so that the lower side portions 31b, 31b can be projected and retracted when the stoppers 31, 31 swing. When the stoppers 31 and 31 are in a free state, the lower side portions 31b and 31b project into the rail portions 20a and 20a of the horizontal rail 20 and balance the upper sides 31b 'and 31b' so that they are horizontal. ing. The stoppers 31 and 31 move upward, and the operating plate 24c comes into contact with the lower sides 31a 'and 31a' of both upper side portions 31a and 31a, so that the stoppers 31 and 31 are entirely pivotally supported by the fulcrum. Since it turns, the lower side 31b, 31
The b is retracted from the rail portions 20a, 20a of the horizontal rail 20. As described above, since the action points of the stoppers 31 and 31 are located away from the shaft support portion, they can be acted on by the light force of the push-up rod 14 and the operability is improved.
If the arm 24b is moved downward from the above state, the stopper 31,
31 turns in balance and the upper side 31a, 31a lower side 31a ', 31
When a'becomes horizontal, the contact is released and the lower side 31b, 3
1b will project to the rail portions 20a, 20a of the horizontal rail 20. Even if the doors C and C fall in this state, the roller Ca,
Since lower side portions 31b and 31b of the stoppers 31 and 31 are located below Ca, the stoppers 31 and 31 come into contact with the arms 24b between the lower bent portions of the rollers 31 and 31 when the load is applied to the rollers Ca and Ca. To prevent the doors C and C from falling.

Further, the stoppers 31 and 31 have the upper moving body 30 attached to the support body 28 with the hexagon socket head bolts 29, 29, but the hexagon socket head bolts 29, 29 are loosened and drilled in the support body 28. By moving in the front-rear direction along the elongated hole 28a, even if a horizontal rail having a different distance from the skeleton B for each form is mounted, the stoppers 31, 31 are placed at the rail portion positions of the horizontal rail.
It is possible to fit and attach so that they can be freely retracted.

[Effect of device]

According to this invention, since the locking member for preventing the door from falling can be moved back and forth, even if the overhead type doors of various forms in which the distance from the frame to the horizontal rail is different,
It is not necessary to set the movable center pillar variously according to the position of each horizontal rail, and the movable center pillar can be always mounted at a fixed position, which simplifies the design and mounting work.

[Brief description of drawings]

FIG. 1 is a front view of a fall prevention device when a movable center pillar is attached and operated, and FIG. 2 is a side view of the fall prevention device.
FIG. 3 is a side view of a movable center pillar and a horizontal rail, FIG. 4 is a front view of a conventional fall prevention device, and FIG. 5 is a side view of the same fall prevention device. A: Fall prevention device, B: Frame C, C ... Door, Ca, Ca ... Roller D ... Frontage opening, E ... Locking member 10 ... Movable center pillar 13, 13 ... Vertical rail 14 …… Pushing rod, 20 …… Horizontal rail 20a, 20a …… Rail part 22 …… Mounting member, 24 …… Slide body 24b …… Arm 28a …… Slot, 31,31 …… Stopper

Claims (1)

[Scope of utility model registration request] 1. A movable center pillar is provided at an intermediate position of the front opening,
In an overhead door in which a horizontal rail is provided on the body side above the mounting position of the movable center pillar, the movable center pillar is provided with a tip protruding above the mounting position of the movable center pillar so as to project toward the horizontal rail. A slide body that moves up and down by the operation of a push-up rod is attached to the upper body side of the movable center pillar so that the slide body can move back and forth, and the slide body moves up and down in conjunction with the vertical movement of the slide body. A fall prevention device for an overhead door, comprising a fall prevention device comprising a locking member for preventing the fall of a positioned door.