JPH07310437A - Safety device for high lift work used with net - Google Patents

Abstract

PURPOSE:To secure the safety of an operator as well as to make the operation efficiency so as not to be lowered at all. CONSTITUTION:A safety device for high lift work is equipped with a net made of a wire rod and a support member 2 installing this net horizontally at the specified position of a building, respectively. This net receives an orator accidentally falling down, ensuring the operator's safety in case of the high lift work. This net is a parallel net 3 made of laterally arranged plural corders 4 with flexibility at the specified intervals and both ends are connected to the support member 2. this parallel net 3 is opened wide among the corders 4, whereby any working members are passable through them.

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 aerial work, in which a worker who falls from a high place is caught by a net to improve the safety of aerial work sites.

[0002]

2. Description of the Related Art The safety of work is extremely important at work sites at high places such as construction sites. This is because every year, a considerable number of construction workers fall from high places and get seriously injured or die. In high-altitude work sites, it is difficult to create a safe work environment for various reasons even though it is known to be dangerous. For example, the gap between the building and the scaffold. Since there is a gap here, a worker who slips his foot from the scaffold, falls between the scaffold and the building, and is seriously injured or killed is not behind. If the scaffold can be fixed to the building, there can be no gap here. However, the scaffold is not fixed to the outer wall of the building without a gap.
That is because the outside of the building cannot be finished. In addition, building slopes around the building with concrete also makes it difficult to secure the scaffold to the building without gaps. This is because it is difficult to assemble the scaffold vertically on the slope.

In order to prevent a worker's fall accident, what is commonly called a "lifeline" is used. One end of the lifeline is connected to the worker, and the other end is provided with a connection tool that can be connected to the scaffolding of the building. When working at a high place, connecting the connecting tool to a scaffolding or the like can prevent the foot from falling even if the foot is accidentally slipped from the scaffolding. However, in the actual construction site, even if there is a lifeline, the initial work of mounting the parent line for connecting the lifelines to the building is difficult and is not actually used. This is because the worker cannot move freely if the lifeline is connected to the scaffold. If the movement range is restricted by the lifeline, the work efficiency will be significantly reduced. This is because when moving, the connecting tool is removed and connected to another part.

In order to prevent this adverse effect and prevent the worker from falling between the building and the scaffold, a safety device for construction has been developed in which a net is stretched here. For example, Japanese Examined Patent Publication No. 63-65790 and Japanese Utility Model Laid-Open No. 59-5.
Japanese Patent No. 7656 and Japanese Utility Model Laid-Open No. 4-116544 describe a safety device for construction using a net. As shown in FIG. 1, the devices described in these publications use, as a net, a grid lattice net 1 in which cord-like bodies such as ropes are braided in a grid lattice. The grid grid net 1 is fixed to a scaffold and stretched horizontally. For example, when constructing a three-story building, if the grid grid net 1 is stretched on the floor surfaces of the second and third floors and on the same horizontal plane as the roof, the worker
It does not fall at a height higher than the floor. A worker sliding down from the roof is 3 with a grid grid net 1 on the same surface as the roof.
The worker on the first floor is received by the grid grid net 1 on the third floor, and the worker on the second floor is received by the grid grid net 1 on the second floor. Further, when the grid grid net 1 is stretched on the floor surface of a building without a floor, it is possible to prevent the worker from falling through the floor.

[0005]

Therefore, the net of the grid grid net has a feature that the work safety can be remarkably improved. Nevertheless, the reality is that the grid grid net is rarely used. This is because it is troublesome to stretch the grid grid net, and if it is stretched, the efficiency of the construction work is significantly reduced.

[0006] It is troublesome to stretch the construction site because the width and length of the gap between the scaffold and the building are not the same at the construction site, so the size of the grid grid net is adjusted according to the size of the gap. It is difficult to adjust the height. Moreover, the grid board net is bulky when not in use, which is one of the reasons why it is not used conveniently.

Further, the efficiency of the construction work is remarkably lowered because when the grid lattice net is stretched, each floor is completely divided and it becomes impossible to efficiently transfer the plate materials and window frames which are construction members. Is. At construction sites, exterior wall materials and window frames are being transferred from between the building and the scaffolding to the upper floors. This is because if a large construction member is transferred in a room of a building, it takes a lot of time and, at the time of transfer, it hits the building and damages the interior. Therefore, even though the grid grid net can improve work safety,
The reality is that it is not used effectively.

The present invention was developed for the purpose of solving these drawbacks of the conventional safety device for working at high places, and an important object of the present invention is to ensure the safety of workers. Moreover, it is another object of the present invention to provide a safety device for work in high places using a net that does not reduce work efficiency.

[0009]

In order to achieve the above-mentioned object, a safety device for work in high places according to the present invention has the following structure. The safety device for aerial work includes a net made of wire and a support member 2 for horizontally tensioning the net at a predetermined position on a work site at aerial position. The net catches the falling worker. By catching the worker on the net, it is possible to prevent the worker from falling from a high place and getting injured.

Further, the safety device for work in high places of the present invention comprises:
The net for receiving the worker is a parallel net 3. The parallel net 3 is formed by arranging a plurality of flexible string-like bodies 4 laterally at a predetermined interval and connecting both ends to the supporting member 2. The parallel net 3 safely catches a falling worker to prevent injury. Further, the parallel nets 3 are opened between the cord-like bodies 4 to allow the construction member to pass when necessary.

[0011]

The safety device for working in high places using the net according to the present invention uses the parallel net 3 as a net for receiving a falling worker. The parallel net 3 is formed by connecting both ends of a plurality of string-like bodies 4 to the support member 2 and arranging them side by side at a predetermined interval. The parallel nets 3 can open the space between the string-like bodies 4 and allow a construction member such as a plate material to pass between the open string-like bodies 4. For this reason, a construction member such as a building material can freely pass though it is possible to catch a falling worker.

It is well known that a net can be stretched between a building and a scaffold to improve the safety of a construction site. Nevertheless, on the actual construction site, there is almost no exception between the scaffold and the building where the net is stretched. This is because the net will hinder the sending of construction materials such as plates and window frames.

The safety device for high-place work according to the present invention has a structure in which a worker is prevented from falling by a net, and construction members can be transferred therethrough. For this reason, there is a feature that it is safe and can perform work in high places with high efficiency.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. However, the examples shown below are examples of safety devices for working at high places for embodying the technical idea of the present invention, and the present invention provides safety devices for working at high places as follows. Not specified.

Further, in this specification, for easy understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "claims column", "action column", and "action column". It is added to the members shown in the section of "Means for Solving the Problems". However, the members shown in the claims are
It is by no means specific to the members of the examples.

The safety device for working in high places such as construction using a net shown in FIG. 2 is a net made of a wire rod and a support member 2 for horizontally stretching the net at a predetermined position in the building.
With. The support member 2 is a scaffold assembled near a building. The support member 2 which is a scaffold is
For example, they are vertically fixed at a distance of 20 to 100 cm. As the support member 2, a scaffold that has been conventionally used can be used. However, the safety device for aerial work of the present invention does not specify the support member as a scaffold for aerial work. The support member includes
Instead of the scaffold, a dedicated member can be used.

The support member 2 shown in FIG. 2 has a horizontal rod fixed in order to connect the net to the gap with the building. The horizontal rod 2A is horizontally fixed to the vertical pillar 9 of the scaffold via the connecting tool 5. This support member 2 is a horizontal rod 2
The position where A is fixed can be adjusted to adjust the horizontal position of the net.

The horizontal rods 2A have connecting hooks 6 fixed at regular intervals, as shown in FIG. 3, so that the string-like bodies 4 can be easily connected. As shown in the cross-sectional view of FIG. 4, the connecting hook 6 has a U-shaped tip portion bent into a hook shape and a rear end portion penetrating the horizontal rod 2A so that the brim is fixed to the rear end so as not to come off. . The hook portion at the tip has an opening width smaller than the outer diameter of the string-like body 4 to prevent the hooked string-like body 4 from coming off.

Connecting hook 6 connected to the horizontal rod 2A
The interval of specifies the interval of the string-like bodies 4 which are nets. The distance between the connecting hooks 6 is preferably adjusted to about 10 cm. This is because the string-shaped bodies 4 spaced at 10 cm can safely receive a worker who falls. However, the safety device for aerial work of the present invention does not specify the interval between the string-shaped bodies 4. The distance between the string-shaped bodies 4 is set to, for example, 3 to prevent the worker from falling.
-30 cm, preferably 5-20 cm, more preferably 5-15 cm.

In the horizontal rod 2A shown in FIG. 5, the projections 7 are fixed at regular intervals to prevent the connecting string-like bodies 4 from shifting laterally. The horizontal rod 2A of this structure is provided with a large number of projections 7, and the string-like body 4 is connected between the projections 7 for use.

As shown in FIG. 2, the net connected to the support member 2 is a parallel net 3 in which a plurality of flexible cord-like bodies 4 are stretched in parallel. The string-like body 4 forming the parallel net 3 is a rope having a strength that does not break even if an operator falls,
Alternatively, a rubber-like elastic body (not shown) having sufficient strength is connected in the middle of the rope. The rope in which the rubber-like elastic body is connected has a cushioning action to elastically stretch and soften the shock when a worker falls. Therefore, there is a feature that the worker who falls can be protected more safely. The parallel net 3 is formed by tensioning the string-like bodies 4 at intervals so that an operator does not drop between them.

The string-like body 4 shown in FIG. 6 has a hook 8 connected at one end so that it can be easily connected to the connecting hook 6 which is the supporting member 2. The hook 8 is connected only to one end of the string-like body 4. As shown in FIG. 6, one end of the string-like body 4 without the hooking hook 8 is tied and connected to the connecting hook 6 of the horizontal rod 2A which is the supporting member 2. Thus, the string-like body 4 having the hooking hook 8 at one end and the hooking hook 8 not at the other end has a feature that it can be easily connected by stretching the length between the horizontal rods 2A having different lengths. is there.

Since the length of the parallel net 3 changes depending on work at a high place such as a construction site, the cord-like body 4 whose length can be easily adjusted can be conveniently used. One length of the string-shaped body 4 is designed to be, for example, 2 to 10 m, preferably 3 to 10 m. At a site where the string-like bodies 4 are shorter than the interval between the horizontal rods 2A, a plurality of string-like bodies 4 are connected and used for lengthening. String 4
To connect the hooks, the hooks 8 are hooked on each other, or one end of the string-like body 4 is tied to the hooks 8 to be connected.

In FIG. 2, a safety device for working in high places is attached to one side of the building. The safety device for high-altitude work of the present invention,
Preferably, it is arranged all around the building as shown in FIG. The safety device for working at height shown in FIG.
A is horizontally fixed to the vertical column 9 of the scaffold, and the horizontal rod 2
The string-like body 4 of the parallel net 3 is connected to A. String 4
The structure for connecting the can be the structure shown in FIGS.

As shown in FIG. 8, the safety device for aerial work according to the present invention preferably has a plurality of cord-like bodies 4 stretched in parallel to form a parallel net 3. However, as shown in FIG.
It is also possible to connect the string-shaped body 4 of the book in a zigzag shape to the horizontal rod 2A to form the parallel net 3. Parallel net 3 in FIG.
Uses one long string-like body 4, or connects a plurality of string-like bodies 4 and uses it as one long string-like body 4. In the parallel net 3 shown in FIG. 9, it is not necessary to adjust the length of each string-like body 4 connected to the horizontal rod 2A.
The entire length of the string-like body 4 may be stretched and bound at the portion where it is finally connected to the horizontal rod 2A.

The parallel nets 3 connecting both ends of the string-like body 4 to the long horizontal rods 2A connect the middle of the string-like body 4 with the intermediate connecting string 10 as shown by the broken line in FIG. One or more intermediate connecting strings 10 are provided in the middle of the string-shaped body 4. However, since the safety device for high-place work of the present invention has a unique configuration in which the space between the string-shaped bodies 4 which are the parallel nets 3 is widened to pass the construction member, the intermediate connecting string 10 The parallel nets 3 connected with each other have an interval of the intermediate connecting cords 10 of, for example, 1 m or more, preferably 2 m or more, and more preferably 3 m or more so that the cord-like body 4 can be spread to pass through the construction member.

The above embodiment shows an example in which the safety device of the present invention is stretched around a building. However, the safety device of the present invention does not specify the use of work at high places for construction. For example, although not shown, a parallel net is laid around the utility pole to secure the utility pole construction, and a parallel net is laid close to the bridge to improve the safety of the bridge construction and further It can also be used for work in high places to improve safety.

[0028]

The safety device for working in high places using the net of the present invention has the following excellent features. Without lowering work efficiency, it is possible to prevent a worker's fall accident and remarkably improve the safety of work sites at high places.
This is because the safety device for aerial work according to the present invention replaces the net with a grid lattice as in the conventional case, and uses a parallel net in which cords are arranged side by side and stretched. The parallel net catches the falling worker and minimizes injuries and deaths due to the falling. Further, when necessary, the space between the string-shaped members stretched side by side can be widened so that the construction member can pass through between the expanded string-shaped members. For this reason, despite the fact that the net is stretched, the construction member can be carried in a state that is almost the same as the site without the net, and the net does not reduce the work efficiency at high places.

The net can be stretched easily, easily, and quickly at a required place. This is because the safety device for work in high places according to the present invention arranges the cord-like bodies laterally to form a parallel net. The string-like bodies that form the parallel net can be wound and stored and transported one by one, and the wound string-like bodies can be carried to the site and connected one by one to the support member to be stretched. In the conventional safety device for working at high places, a large grid grid net is stretched, so it takes time and effort to adjust the length and width, and it is bulky when folded.
It is extremely troublesome to carry and store. In addition, there is a drawback that it is troublesome to open and fold it.

Further, since the safety device of the present invention uses the parallel net for the net, it has a feature that it can stand up a stepladder or the like through the net and move the stepladder along the parallel net. Therefore, a parallel net is stretched around the stepladder,
It has the feature that it can effectively prevent falling from the stepladder, and that the stepladder can be moved freely to the side to allow efficient work.

[Brief description of drawings]

FIG. 1 is a perspective view showing a usage state of a conventional safety device for construction using a net.

FIG. 2 is a perspective view showing a usage state of a safety device for working at height according to an embodiment of the present invention.

FIG. 3 is a plan view showing a portion for connecting a string-like body of a parallel net to a horizontal rod.

FIG. 4 is a side view showing a portion for connecting a parallel net-shaped body to a horizontal rod.

FIG. 5 is a plan view of a horizontal rod according to another embodiment.

FIG. 6 is a partial cross-sectional side view showing a state in which a parallel net-shaped body is connected to a horizontal rod.

FIG. 7 is a plan view showing another specific example of the usage state of the safety device for working at high places of the present invention.

FIG. 8 is a plan view showing an example of a parallel net.

FIG. 9 is a plan view showing another embodiment of the parallel net.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Grid grid net 2 ... Support member 2A ... Horizontal rod 3 ... Parallel net 4 ... String-like object 5 ... Connecting tool 6 ... Connecting hook 7 ... Protrusion 8 ... Hook hook 9 ... Vertical column 10 ... Intermediate connecting string

Claims (1)

[Claims] 1. A net made of wire rods and a support member (2) for horizontally stretching the net at a predetermined position in a building. In a safety device for work in high places configured to ensure safety, a net has a plurality of flexible string-like bodies (4) arranged side by side at predetermined intervals to support members at both ends ( A parallel net (3) connected to (2), characterized in that the parallel net (3) is configured so as to open between the string-like bodies (4) so that it can pass through a construction member. A safety device used for working in high places.