JP2003056265A - Fall prevention device of structure shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fall prevention device capable of surely preventing the fall of a structure shutter. SOLUTION: The fall prevention device of the structure shutter 31 having a shutter body 34 capable of closing an opening section of a structure, a wire 35 for hanging the shutter body 34 and a take-in section for lifting and lowering the shutter body 34 by the wire 35 includes a mounting section 2 mounted to the shutter body 34, a stopper 3 connected to the wire 35 and a locking section 4 capable of locking the stopper 3, the stopper 3 is in a non-projected state to a mounting section 2 and is not interlocked with the locking section 4 when force in the take-in direction applied to the wire 35 is in excess of a predetermined value, it is in a projected state to interlock with the locking section 4 when the force in the take-in direction is less than a predetermined value, and the locking section 4 includes a locking bar 12 with which the stopper 3 is interlocked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fall prevention device used for a shutter for a building for closing an opening such as a doorway or a passage of the building.

[0002]

2. Description of the Related Art FIGS. 2 and 3 show an example of a conventional fall prevention device for a building shutter. The building shutter 31 to which the fall prevention device shown here is attached
Is a shutter main body 34 capable of closing the opening 33 of the building 32, a wire 35 for suspending the shutter main body 34, and a shutter main body 3 by pulling and pulling out the wire 35.
4, a take-up portion 36 for moving up and down, guide rails 37 provided along both side edges of the opening 33, and a shutter body 34.
And a guide roller 38 attached to. The shutter body 34 is configured by rotatably connecting a plurality of plate bodies 34a to each other. The guide roller 38 can run in the guide rail 37. The building shutter 31 can move the shutter body 34 upward by winding the wire 35 by the take-up portion 36, and can move the shutter body 34 downward by paying out the wire 35 from the take-up portion 36. It is like this. In the present invention, the shutter for a building refers to a shutter that closes an opening such as a doorway or a passage of a building, and includes a so-called overdoor in addition to a general shutter.

The fall prevention device 21 attached to the building shutter 31 includes an attachment portion 22 attached to the lower portion of the shutter main body 34 and a stopper 23 connected to a wire 35. The stopper 23 includes a stopper body 24 and a blade 25 attached to the stopper body 24, and is rotatable with a rotary shaft 26 extending in the horizontal direction. The stopper 23 is biased by a spring (not shown) in a direction in which the blade 25 approaches the guide rail 37. The stopper 23 is a wire 35.
Thus, when the shutter body 34 is in a suspended state (normal state), it is pulled by the wire 35 and rotated clockwise in the figure, so that the blade 25 is separated from the guide rail 37.

When the wire 35 breaks due to deterioration of the strength of the wire 35 due to aging or the like, the pulling force of the wire 35 cannot be applied to the stopper 23. As a result, the stopper 23 rotates counterclockwise in the figure by the urging force of the spring (not shown), and the blade 25 comes into contact with the outer surface of the guide rail 37. The blade 25 is in a state where the tip of the blade 25 bites into the outer surface of the guide rail 37 and is locked to the guide rail 37. As a result, the fall prevention device 2
1 and the shutter body 34 are prevented from descending any more. Therefore, even if the wire 35 is broken, the shutter body 34 can be prevented from falling.

[0005]

However, in the above fall prevention device, since the blade 25 is adapted to be engaged with the outer surface of the guide rail 37, the shutter main body 34 is formed.
Therefore, there is a need for a fall prevention device that can reliably prevent the shutter body 34 from falling. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fall prevention device capable of reliably preventing the building shutter from falling.

[0006]

SUMMARY OF THE INVENTION A fall prevention device for a building shutter according to the present invention is a shutter body capable of closing an opening of a building, a wire for suspending the shutter body, and a wire pulling and drawing wire. A device for preventing a shutter for a building from falling down, comprising a take-up part for raising and lowering a shutter main body by means of a mounting part attached to the shutter main body, a stopper connected to a wire, and a lockable stopper. With a stopper, when the force applied to the wire in the pulling direction is more than a predetermined value, the stopper does not project to the mounting portion and does not lock to the locking portion, When the force in the direction becomes less than a predetermined value, it projects to the mounting portion and is locked to the locking portion, and the locking portion includes a locking bar to which the stopper locks. The It is characterized in. The stopper is
It is rotatably provided with respect to the mounting portion and can be locked with the locking portion when it is rotated so as to project from the mounting portion, and engages when it is rotated so as not to project. It is preferable that the stopper is not locked. It is preferable that the mounting portion is provided with a biasing means that biases the stopper in a direction in which the stopper can be locked. The locking bar is preferably provided in multiple stages in the vertical direction of the shutter body. The fall prevention device of the present invention is preferably configured to be attachable to and detachable from the building shutter.

[0007]

FIG. 1 shows an embodiment of a fall prevention device according to the present invention. The fall prevention device 1 shown here is shown in FIG.
Is an attachment portion 2 attached to the bottom of the shutter body 34.
And the stopper 3 connected to the wire (striated body) 35,
The stopper 3 is provided with a locking portion 4 capable of locking. In the present invention, a chain or the like may be used instead of the wire. The mounting portion 2 is formed in a U-shaped cross section in which a front plate 2b and a rear plate 2c are provided on the front and rear edges of the side plate 2a. The mounting portion 2 is a plate body 34 of the shutter body 34.
It is attached to the side portion of a by screwing or the like.
The attachment portion 2 is attached to the plate body 34a such that the side plate 2a is along the side surface of the plate body 34a and the front and rear plates 2b and 2c are respectively along the front surface and the rear surface of the plate body 34a. Mounting part 2
A bearing 5 is provided on the front surface of the front plate 2b, and a rotary shaft 6 is inserted through the bearing 5.

The rotary shaft 6 is provided substantially horizontally, and an arm 7 is connected to one end of the rotary shaft 6. The arm 7 is provided with an extending portion 7a extending in a direction away from the front plate 2b in the state shown in FIG. 1, and a connecting portion 7b extending from the tip of the extending portion 7a in parallel with the rotary shaft 6. . A stopper 3 is provided at the other end of the rotary shaft 6.

The stopper 3 is a triangular plate-like member and is arranged substantially parallel to the side plate 2a of the mounting portion 2. The stopper 3 is rotatable with respect to the mounting portion 2 by means of the rotary shaft 6, and as shown by the solid line, the rear end edge 2d of the side plate 2a.
From the state in which it does not project (non-projection state), as shown by the two-dot chain line, it can rotate from the state in which it projects from the rear edge 2d (projection state). A fixing portion 8 for fixing the wire 35 is provided below the stopper 3, and one end of the wire 35 is fixed to the fixing portion 8.

An upper end of a spring 9 as a biasing means is connected to a connecting portion 7b of the arm 7 connected to the rotary shaft 6. The lower end of the spring 9 is attached to the mounting portion 2 at the fixed portion 9a.
The spring 9 is fixed to the front plate 2b, and is capable of urging the stopper 3 in the non-protruding state in the protruding direction.

At the lower part of the mounting portion 2, there is provided a wire hooking portion 10 for movably hooking the wire 35. In the wire hook 10, the stopper 3 is moved to the wire hook 1
The wire 35 extending upward from below 0 can be moved in the pulling direction and the pulling direction as indicated by an arrow in the figure.

The locking portion 4 is a locking portion main body 11 having a U-shaped cross section.
And a plurality of locking bars 12. Locking part body 1
1 is formed in a U-shaped cross section including a rear plate 11a and side plates 11b and 11b provided on both side edges of the rear plate 11a,
The shutter body 34 is provided from the upper portion to the lower portion. The locking bar 12 is provided substantially horizontally so as to be bridged between the both side plates 11b, and is provided in multiple stages at intervals from the upper portion to the lower portion of the locking portion main body 11. The locking bar 12 is formed at a position where the protruding portion (near the tip 3a) can be locked when the stopper 3 is in the protruding state.

The fall prevention device 1 includes a building shutter 31.
It is supposed to be removable. That is, the fall prevention device 1 can be attached to the shutter 31 by attaching the attachment portion 2 to the shutter body 34 by screwing or the like, and can be removed from the shutter 31 by removing the attachment portion 2 from the shutter body 34. Is configured.

The operation of the fall prevention device 1 will be described below. The wire 35 extends downward from the take-up portion 36, extends upward through the wire hooking portion 10, and is fixed to the stopper 3 at the fixing portion 8. When the shutter main body 34 is suspended by the wire 35 (normal state), the downward pulling force (force in the take-up direction) applied to the stopper 3 by the wire 35 increases (beyond a predetermined value). . Therefore, the stopper 3 is in a state in which the tip 3a faces downward, that is, in a state where it does not project from the rear edge 2d of the side plate 2a (non-projection state), as shown by the solid line.
When the stopper 3 is in the non-protruding state, the stopper 3
However, it is not locked to the locking portion 4. In this state, the wire 35 is pulled from and pulled out from the pulling portion 36, so that the shutter main body 34 moves up and down.

When the wire 35 breaks due to deterioration of the strength of the wire 35 due to aging or the like, the tensile force applied to the stopper 3 by the wire 35 becomes small (less than the above predetermined value). Therefore, the connecting portion 7b of the arm 7 is moved downward by the urging force of the spring 9, whereby the rotary shaft 6 is rotated and the stopper 3 is rotated in the arrow direction. The stopper 3 is in a state in which the front end 3a faces rearward, that is, as shown by a chain double-dashed line, the rear end edge 2d
It is in a state of protruding from (projected state).

In this state, the tip 3a of the stopper 3
Is locked to the locking bar 12 of the locking portion 4. As a result, the fall prevention device 1 and the shutter body 34 are prevented from descending any more.

In the fall prevention device 1 of this embodiment, when the pulling force applied to the wire 35 is large, the stopper 3 is in the non-protruding state and is not locked to the locking portion 4, and when the pulling force is small. Since it is in a protruding state and is locked to the locking portion 4, and the locking portion 12 is provided with the locking bar 12 to which the stopper 3 is locked, the wire 35 is broken to the wire 35 by breaking or the like. When the pulling force becomes small, the stopper 3 is surely locked to the locking portion 4, and the shutter main body 3
4 can be stopped. Therefore, when the wire 35 breaks, it is possible to reliably prevent an accident such as a person being caught between the shutter body 34 and the floor surface.

The stopper 3 is rotatable with respect to the mounting portion 2 and is locked by the locking portion 4 when it is in a protruding state.
In addition, since it does not engage with the engaging portion 4 when it is in the non-protruding state, the device configuration can be simplified, and the device can be reduced in weight, size, and cost.

Further, since the mounting portion 2 is provided with the spring 9 for urging the stopper 3 in the direction in which it can be locked by the locking portion 4, the stopper 3 is surely projected when the wire 35 breaks. Can be made. Therefore, the shutter body 34
Can be surely stopped.

Further, by adopting the structure in which the locking bar 12 is provided in multiple stages in the ascending and descending direction of the shutter main body 34, the stopper 3 has the height position of the fall prevention device 1 when the wire 35 breaks. The lock bar 12 is provided at a position close to. Therefore, when the wire 35 breaks, the shutter body 34 can be immediately stopped.

Further, since it is detachably attached to the building shutter 31, it can be applied to any type of shutter 31.

[0022]

According to the drop prevention device of the present invention, when the pulling force on the wire becomes small, the stopper can be securely engaged with the engaging portion and the shutter body can be stopped.
Therefore, when the wire breaks, it is possible to reliably prevent an accident such as a person being caught between the shutter body and the floor surface.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a fall prevention device for a building shutter according to the present invention.

FIG. 2 is a structural diagram showing an example of a conventional fall prevention device.

3 is a perspective view of the fall prevention device shown in FIG. 2. FIG.

[Explanation of symbols]

1 ... Fall prevention device, 2 ... Mounting part, 3 ... Stopper, 4 ...
..Locking parts, 9 ... Spring (biasing means), 12 ... Locking bar,
31 ... Shutter for building, 32 ... Building, 33 ... Opening part, 34 ... Shutter body, 35 ... Wire, 36 ...
Collection department

Claims (5)

[Claims] 1. A shutter main body (34) capable of closing an opening (33) of a building (32), a linear body (35) for suspending the shutter main body, and pulling and pulling out the linear body. A device for preventing a building shutter (31) from falling, comprising a take-up part (36) for raising and lowering the shutter body, which is connected to a mounting part (2) attached to the shutter body and a linear body. The stopper (3) and the engaging portion (4) capable of engaging with the stopper are provided, and the stopper protrudes from the attachment portion when the force in the take-up direction applied to the filamentous body is equal to or greater than a predetermined value. When the force in the pulling direction is less than a predetermined value due to breaking of the filamentous body, etc., it will project to the mounting part and will be locked to the locking part. The lock bar is the lock bar where the stopper locks. A fall prevention device (1) for a building shutter, comprising: (12). 2. The stopper is rotatably provided with respect to the mounting portion, and when the stopper is rotated so as to be in a protruding state with respect to the mounting portion, the stopper can be locked with the locking portion and is in a non-projecting state. 2. The fall prevention device for a building shutter according to claim 1, wherein the fall prevention device is configured so as not to be locked by the locking portion when being rotated in this manner. 3. The building according to claim 2, wherein the mounting portion is provided with urging means (9) for urging the stopper in a direction in which it can be locked by the locking portion. Shutter fall prevention device. 4. The locking bar is provided in multiple stages in the vertical direction of the shutter body.
The fall prevention device for a building shutter according to any one of the above. 5. The fall prevention device for a building shutter according to claim 1, wherein the device is detachably attached to the building shutter.