JPH1025902A - Automatic opening-and-closing type drop-protection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic opening-and-closing type drop-protection device capable of being placed in a set state or in a folded state by operation of only motor device, etc. SOLUTION: This device is equipped with electric chain blocks 21 as winding-up mechanism sections and protection panels 31 mounted to a framework scaffold 51 as a temporary member of the chain blocks 21. It is also equipped with chains 38a and 38b as stop devices for stopping the protection panels 31 at set position, blowing-up prevention materials 41, a stopper member 37 as a holding device of the blowing-up prevention materials 41 for the protection panels 31 as the set position and a contact member 43 as a releasing device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to construction work and the like.
The present invention relates to a fall protection device (commonly referred to as a morning glory device) installed on a temporary member such as a framed scaffold or a frame.

[0002]

2. Description of the Related Art In order to prevent construction materials and tools from falling onto a road or the like in construction work or the like, a fall protection device is installed like a eaves from a temporary member such as a framed scaffold or a frame. However, this fallen object protection device is disassembled and disassembled every time when it becomes a hindrance to the unloading and unloading of equipment by a crane, etc., and when there is a danger of being blown away by a typhoon, etc. Need to be reattached. As a solution to such a problem, for example, Japanese Patent Laid-Open Publication No. Sho 62-244976 discloses a "foldable curing morning glory". The folding curing morning glory 71 shown in FIG.
2 is rotatably attached to the framework scaffold 75, and a diagonal member 73 also serving as a blow-up preventing member is provided with an outer tube 73a.
And the inner tube 73b is a telescopic sheath tube,
Setting position 72A and folding position 72B of protection panel 72
It is possible to follow the rotation between and. The protection panel 72 is fixed at the set position 72A and the folded position 72B by pinning the pin holes (not shown) of the outer tube 73a and the inner tube 73b of the diagonal member 73 opened so as to overlap each other. 74.

[0003]

However, the folding operation from the setting position 72A of the protective panel 72 to the folding position 72B on the folding curing morning glory 71 is performed by the frame scaffold 7.
5 is carried out by raising the protective panel 72 with a wire or the like. Therefore, the protective panel 72 is not only a heavy work because it is heavy, but also a very dangerous work because the installation location is high. Also, the work of aligning the pins 74 with the pin holes is performed by one protection panel 72.
For a plurality of diagonal members 73
In addition to the worker raising the protection panel 72, other workers are required. Furthermore, this folding curing morning glory 7
Since a large number of units 1 are provided at the construction site, when it is necessary to fold all of them in a typhoon or the like, it takes a considerable amount of time and effort, and may be dangerous work in a strong wind. The same can be said for the operation of returning the protection panel 72 to the set position 72A again.

Accordingly, an object of the present invention is to provide an automatic opening / closing falling object protection device which can be set to a set state or a folded state only by operating an electric device or the like.

[0005]

According to the first aspect of the present invention, there is provided an automatic opening / closing fall protection device which is rotatably attached to a hoisting mechanism and a temporary member or a frame. The protection panel is characterized by comprising a protection panel interlocked with a winding member of the lifting mechanism, and a stopping means for stopping the protection panel at a set position.

Therefore, when the winding member of the unwinding mechanism is rewound from the state where the protective panel is in the folded position,
The protection panel is rotated downward by its own weight around a mounting portion with a temporary member (for example, a framed scaffold), and then stopped by a stop means and arranged at a set position. When the take-up member of the take-up mechanism is unwound from the state in which the protective panel is at the set position, the take-up member is unwound after the protective panel rotates upward about the attachment portion with the temporary member. The protection panel is in the folded position in the folded state.

According to a second aspect of the present invention, there is provided an automatic opening / closing fall protection device, comprising: a hoisting mechanism; a protection panel rotatably mounted on a temporary member or a frame, and interlocking with a winding member of the hoisting mechanism; A stopping means for stopping the protection panel at the set position, a blow-up prevention member interlocked with the protection panel, and a holding / holding of the blow-up prevention member for the protection panel at the set position.
And releasing means.

Accordingly, when the winding member of the unwinding mechanism is unwound from the state where the protective panel is in the folded position, the protective panel is lowered by its own weight around the mounting portion with the temporary member (for example, a framed scaffold). After rotating in the direction
While being stopped by the stopping means and arranged at the set position, the blow-up prevention member is also arranged at the set position in conjunction with the protection panel. In this state, when a blowing force due to wind or the like acts on the protection panel, the protection panel tends to rotate upward, but the holding means restrains the blow-up prevention member to the protection panel to prevent rotation of the protection panel. When the wind-up member of the wind-up mechanism section is hoisted from the state where the protective panel is at the set position, first, the blow-up preventing material is detached from the protective panel by the releasing means, and then the protective panel is connected to the temporary member. After rotating upward around the mounting portion, the protection panel is brought to the folded position in a state where the winding member is completely unwound, and the blow-up preventing member is brought to the folded position in conjunction with the protection panel.

According to a third aspect of the present invention, there is provided an automatic opening / closing fall protection device according to the second aspect, wherein the blow-up preventing member is rotatably attached to the temporary member or the frame. A stopper provided at a position where the means for holding the blow-up prevention material to the protection panel at the position does not hinder the rotation of the blow-up prevention material and the blow-up prevention material comes into contact with the rotation direction of the protection panel. A member for releasing the blow-up prevention member from the protection panel at the set position is provided on the blow-up prevention member so that the winding member comes into contact before the protection panel is rotated by the winding of the winding member. The contact member is provided.

Therefore, when the winding member of the unwinding mechanism is rewound from the state in which the protective panel is in the folded position, the protective panel rotates downward about its mounting portion with the temporary member by its own weight, The blow-up preventing member is stopped by the stopping means and arranged at the set position, and the blow-up preventing member is also arranged at the set position after rotating downwardly around the mounting portion with the temporary member in conjunction with the protection panel by its own weight. In this state, when a blowing force due to wind or the like acts on the protection panel, the protection panel tends to rotate upward. However, the protection panel comes into contact with the blow-up prevention member by the stopper member, thereby preventing rotation of the protection panel. When the take-up member of the take-up mechanism is unwound from the state where the protection panel is at the set position, first, the loosened take-up member comes into contact with the contact member, and the blow-up prevention member is removed from the protection panel. Then, after the protection panel rotates upward centering on the attachment part with the temporary member, the protection panel is brought to the folded position with the winding member fully unwound, and the blow-up prevention member is also linked. As a result, it is rotated upward about the attachment portion with the temporary member so as to be in the folded position.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an automatic opening / closing fall protection device according to the present invention. The automatic opening / closing type fallen object protection device 1 shown in FIG.
) Comprises a fixed frame 11, an electric chain block 21 serving as a hoisting mechanism, a protection panel 31, and a blow-up prevention member 41. The fixed frame 11 is made of a square steel pipe, and has vertical members 12a and 12b at both ends and a central vertical member 13a.
13b, upper horizontal members 14a, 14b, 14c, and lower horizontal member 15. Upper horizontal members 14a, 14c
The lower horizontal member 15 includes a frame scaffold 51 as a temporary member.
The clamp 16 for attaching to the building frame support 52 is fixed by welding via the plate 17. Clamp 16
May be provided according to the horizontal dimension of the fixed frame 11 (that is, the fallen object protection device 1) and the arrangement interval of the frame supporting columns 52 of the framed scaffold 51. Also,
In this case, the clamp 16 was welded and fixed via the plate 17 because the constituent members of the fixed frame 11 were square steel pipes. However, if the constituent members of the fixed frame 11 were steel pipes having a circular cross section, orthogonal clamps (both are shown in the drawing). Zu) can be used,
There is no need to fix by welding or the like, and the arrangement position is also free. An electric chain block 21 is used as a hoisting mechanism, and a central vertical member 13a, 1
It is arranged at the upper middle part of 3b. Chain block 2
The chain 22 which is the winding member from 1 is connected to the mounting member 39 provided on the central member 32c of the protection panel 31 shown in FIG. The protection panel 31 is made of square steel pipe,
A frame is composed of the main members 32a and 32b, the connecting members 33a and 33b, and the central member 32c. A surface material 34 is provided on the entire lower surface of the protection panel 31.
Form a surface to receive falling objects directly. Although a plywood panel is used as the face material 34, any material that can catch a falling object, such as a corrugated sheet or a net, may be used. The protection panel 31 is rotatably attached to the fixed frame 11. In this case, the fixed frame 1 shown in FIG.
1 and a steel plate 35 provided on the protection panel 31 are joined by pins 36, and the main members 32a, 32 of the protection panel 31 are provided.
b, provided at the position of the central member 32c. Therefore, the protection panel 31 is rotatably attached to the framework scaffold 51 which is a temporary member via the fixed frame 11. A stopper member 37, which is a holding means for the blow-up preventing member, is provided at an intermediate portion of the connecting member 33a shown in FIG. 1, and the stopper member 37 is provided with a holding angle 37a made of angle iron shown in FIG. Steel holding plate 37b
Consists of The protection panel 31 shown in FIG.
A chain 38a is provided as a stopping means provided to connect the main member 32a and the upper horizontal member 14a of the fixed frame 11, and also connects the main member 32b and the upper horizontal member 14c of the fixed frame 11. And a chain 38b as a stopping means provided as described above. The blow-up prevention member 41 is a square steel contact member which is a means for releasing from a protection panel 31 provided so as to connect the vertical members 42a and 42b made of rectangular steel pipes and an intermediate portion between the vertical members 42a and 42b. 43, a vertical member 42a,
Angle 4 provided to connect the tip of 42b
And 4. The angle 44 forms a portion of the stopper member 37 provided on the protection panel 31 to be stopped. The base ends of the vertical members 42a and 42b are rotatably attached to the central vertical members 13a and 13b of the fixed frame 11 by pins 45, respectively. Therefore, the blow-up prevention member 41 is also rotatably attached to the frame scaffold 51 which is a temporary member via the fixed frame 11.

Here, the operation of the fallen object protection device 1 will be described, and the function of each unit will be described. In the fallen object protection device 1 shown in FIG. 2 (and FIG. 1), the chain 22 as the winding member is unwound and relaxed, and the chain 38b (and 38a) as the stopping means is set taut. The protection panel 31 is arranged at a position (in this case, an angle θ of about 25 ° with the horizontal of the protection panel 31). At this time, as shown in FIG. 5, the blow-up prevention member 41 is rotatable in the upward direction B only by being held by the holding plate 37b of the protection panel 31. When the blow-up force C by the wind shown in FIG. 6 acts on the protection panel 31, the protection panel 31 tries to rotate in the upward direction A, but the holding angle 37 a is changed to the blow-up prevention material 41.
Of the protection panel 31 is prevented from rotating by blowing up. When the wind stops and the blowing force C stops acting, the state returns to the original state shown in FIG. 5 again.

The operation of the fallen object protection device 1 from the set state shown in FIG. 2 to the folded state shown in FIG. 4 will be described. First, when the operation lever 23 of the electric chain block 21 shown in FIG. 2 is operated, the hoisting of the chain 22 is started by the internal drive motor 24. The chain 22 gradually rolled up,
Before rotating the protective panel 31 in the upward direction A about the pin 36, the protective panel 31 contacts the contact member 43 of the blow-up preventing member 41, and as shown in FIG. To the protection panel 31 by rotating the pin 45
Let go. When the chain 22 is further wound up, the protection panel 31 starts to rotate in the upward direction A. In this case, the stopper member 37 pushes up while being in contact with the blow-up prevention member 41, so that the blow-up prevention member 41 In conjunction with 31, it is arranged at the folding position shown in FIG. The hoisting of the chain 22 is automatically stopped at this position by a limit switch (not shown).

Next, the operation of the fallen object protection device 1 from the folded state shown in FIG. 4 to the set state shown in FIG. 2 will be described. First, when the operation lever 23 of the electric chain block 21 shown in FIG. 4 is operated, the rewinding of the chain 22 is started by the internal drive motor 24. As the chain 22 is rewound, the protection panel 31 rotates about the pin 36 in the downward direction A 'by its own weight, and the blow-up preventing member 41 also contacts the stopper member 37 of the protection panel 31 by its own weight. While rotating in conjunction with the protection panel 31, it rotates about the pin 45 in the downward direction B '. As the unwinding of the chain 22 proceeds, the chain 38b (and 38) shown in FIG.
a) The protection panel 31 is arranged at the set position by stretching. At this time, the blow-up prevention member 41 that has been linked to the protection panel 31 is also held and disposed on the holding plate 37b of the protection panel 31. Rewinding of the chain 22 is performed to some extent by a limit switch (not shown).
2 stops in a relaxed state.

The present invention is not limited to the above embodiment. For example, instead of a frame scaffold, a mounting plate is provided on the skeleton as a temporary member to which an automatic opening / closing fallen object protection device is attached, and the protection panel and blow-up prevention member can be freely rotated directly without using a fixed frame and clamps. It can also be provided. In addition, the interlocking of the blow-up prevention member with the protection panel can be performed by using a movable hinge or the like besides performing the contact between the two. In addition, the winding mechanism and the winding member are not limited to electric chain blocks and chains, as long as the protection panel can be rotated up and down. The stopper, the contact member, and the like, which are means for holding and releasing the protection panel, can be changed in structure, shape, material, and the like without departing from the gist thereof. Further, in the embodiment, the one provided with the blow-up preventing material has been described, but it goes without saying that the blow-up preventing material is not necessarily required. For example, if the protective panel has a weight of at least 5 kg per square meter, it will not be blown up by the wind.

[0016]

According to the present invention, the protection panel can be set or folded only by the operation of the unwinding mechanism, and if the wind-up prevention member and the holding / releasing means for the same are provided, The protection panel and blow-up prevention material can be set or folded simply by operating the lifting mechanism, which makes it easy and quick to work alone, and requires dangerous work on high places such as framed scaffolds. And not. In addition, since the assembling work of the apparatus main body at the site can be eliminated, the work of attaching and detaching to a temporary member such as a framed scaffold, a frame or the like is also easy.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an automatic opening / closing falling object protection device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view for explaining the operation of the embodiment of the present invention (part 1);

FIG. 3 is a sectional view (part 2) for explaining the operation of the embodiment of the present invention;

FIG. 4 is a sectional view (part 3) for explaining the operation of the embodiment of the present invention;

FIG. 5 is a cross-sectional view illustrating functions of the embodiment of the present invention (part 1);

FIG. 6 is a sectional view illustrating functions of the embodiment of the present invention (part 2);

FIG. 7 is an explanatory diagram of a conventional technique.

DESCRIPTION OF THE SYMBOLS 1 Automatic opening / closing fall protection device 21 Electric chain block which is a winding mechanism 22 Chain which is a winding member 31 Protection panel 37 Stopper member 37a as a holding means for blow-up prevention material 37a Stopper member A holding angle 37b a holding plate 38a, 38b as a stopper member a chain 41 as a stopping means 41 an anti-blowing member 43 an abutting member as a means for releasing from the protection panel 44 an angle as a stopper-stopped portion of the stopper member 51 a temporary member A framework scaffold

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Junichi Watanabe 1-16-14 Shibuya-ku, Tokyo Tokyu Construction Co., Ltd. (72) Inventor Shuichi Ueno 1-16-14 Shibuya-ku, Tokyo Tokyu Corporation In the formula company

Claims (3)

[Claims] An unwinding mechanism, a protection panel rotatably attached to a temporary member or a frame, and interlocking with a winding member of the unwinding mechanism, and stopping means for stopping the protection panel at a set position. An automatic opening / closing fall protection device characterized by the following. 2. A hoisting mechanism, a protection panel rotatably mounted on a temporary member or a frame, and interlocking with a winding member of the hoisting mechanism, stopping means for stopping the protection panel at a set position, An automatic opening / closing fall protection device comprising: a blow-up prevention member interlocked with a panel; and means for holding and releasing the blow-up prevention member with respect to a protection panel at a set position. 3. The blow-up preventing member is rotatably attached to the temporary member or the skeleton, and the means for holding the blow-up preventive member on the protection panel at the set position does not hinder the rotation of the blow-up preventive member. A stopper member provided at a position where the blow-up preventing member abuts with respect to the rotation direction of the protection panel, and means for releasing the blow-up prevention member from the protection panel at the set position is used to unwind the winding member. The contact member provided on the blow-up prevention member so that the take-up member contacts before the protection panel rotates.
The automatic opening / closing fallen object protection device described in (1).