JPH0725393Y2 - Safety net - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a safety net used at a construction site or the like.

[Conventional technology]

When performing high-altitude work such as in civil engineering work and construction sites, it is obliged to install a safety net in order to ensure the safety of workers and to protect the people below from falling objects. The property required of this safety net is that it has a high impact absorption property because it receives a heavy falling object. Moreover, since it is stretched outdoors for a long period of time, it must also have excellent weather resistance. Further, it often comes into contact with tools, machine parts, etc., and thus it is required to have high wear resistance. In addition, since the net can be stretched and transported easily, it is preferable that the net is lightweight and has excellent workability. For this reason, synthetic resin such as polyester is conventionally used as the material of the safety net.

[Problems to be solved by the device]

When the safety net is stretched, the ends of the safety net are tied to the pillars, piles, protrusions, etc. with some slack in order to reduce the impact when a falling object collides. for that reason,
Rainwater, for example, tends to collect in the lower part of the net. As a result, the net becomes heavier and the amount of slack increases. This slack makes the work site look unattractive and hinders the work, so it is necessary to re-tension the net.
However, when rainwater or the like collects on the stretched net, slackening occurs again. Therefore, it is required to perform the re-working operation frequently.

In addition, when the net is exposed to the hot sun for a long period of time with weight added, the synthetic resin, which is the material of the net, is permanently deformed, and a large slack is made permanent.

Therefore, an object of the present invention is to provide a safety net in which the looseness of the stretched net can be suppressed to a necessary minimum and the desired tension can be always maintained.

[Means for Solving the Problems]

In order to achieve the object, the safety net of the present invention is provided with an elastic rope which is stretched around the outer periphery of the net and the central portion in the longitudinal and lateral directions and elastically expands and contracts in the longitudinal direction, and these elastic ropes. It is characterized by comprising a net body stretched in a space surrounded by.

[Action]

In the conventional safety net, as described above, the net main body is stretched in a loosened state so as to alleviate a drop impact. On the other hand, in the safety net of the present invention, an elastic rope is added to a predetermined portion of the net body, and elastic deformation of the rope receives a drop impact. Therefore, the net can be stretched in a substantially tensioned state, and the appearance after stretching can be significantly improved.

In addition, the elastic rope attached to the net body divides the net body into each block and releases the movement of the net body in the block, so compared to the one where the whole net moves freely, The amount of slack is extremely small. As a result, the amount of accumulated rainwater is reduced. Moreover, since the elastic ropes on the four sides of each block support the weight of the net body including the retained material, deformation of the net as a whole is suppressed.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a state in which a safety net according to an embodiment of the present invention is horizontally stretched. The safety net 1 is provided with a resilient rope 3 surrounding the outer edge of the net body 2. Further, in the longitudinal direction and the lateral direction of the net body 2 surrounded by the elastic rope 3 at the outer edge, a single or plural elastic ropes 4 are stretched at appropriate intervals. The distance between the adjacent elastic ropes 4 stretched inside is about 50 to 200 cm. Both ends of the elastic ropes 4 are connected to the elastic ropes 3 at the outer edges, and the elastic ropes 4 are connected to each other at the intersections of the elastic ropes 4.

As the elastic ropes 3 and 4, various elastic ropes that expand and contract according to the applied force are used. As for these elastic ropes 3 and 4, the impact of various devices, items, etc. that have fallen onto the safety net 1 is absorbed by the extension of the ropes 3 and 4, and the safety net 1 is tensioned thereafter. Those capable of satisfying the above are preferable. For example, a rope for packing, which initially stretches freely according to the magnitude of the load, but exerts sufficient drag when a force greater than that is used, is used.

FIG. 2 shows two examples. The elastic ropes 3 and 4 of FIG. 2 (a) have a core 5 made of a stretchable material such as rubber, and the periphery thereof is covered with a cloth 6 such as gathers. On the other hand, the elastic ropes 3 and 4 shown in FIG. 2 (b) are composed of a stretchable synthetic resin, a spring 8 around a core material 7 such as a woven cloth.
Is wound. The spring 8 can be omitted depending on the case.

The elastic rope 3 surrounds the outer edge of the net 2,
When the elastic rope 4 is attached to the internal net body 2, the net body 2 becomes a net body block 9 in which four rounds are divided by the individual elastic ropes 3 and 4. The net block 9 has an area which is a fraction of that of the whole net 2, and is supported by elastic ropes 3 and 4 for four rounds.

Therefore, the four corners of the net body 2 are attached to the support columns A by the ropes B as shown in FIG. 1, for example. In addition, both ends of each elastic rope 4 are fastened to the beam member C that is provided between the columns A by a fastening string D.
Conclude with. When the safety net 1 is stretched like this,
The force applied to each net block 9 is transmitted to the column A and the beam C via the respective elastic ropes 3 and 4, and is received by the column A and the beam C. Therefore, the permanent deformation of the mesh body 2 due to the force applied to each mesh block 9 is suppressed.

Further, the impact of the object falling on the safety net 1 is absorbed by the stretch of the elastic ropes 3 and 4. Therefore, unlike the conventional safety net, it is not necessary to stretch the net with a slack that allows for shock relaxation. As a result, the slack of the net body 2 in the stretched safety net 1 is substantially caused by gravity, and the weight of rainwater or the like accumulated on the slack can be made extremely small.

Therefore, since the safety net 1 can be stretched in a tensioned state, the appearance of a construction site or the like is improved, and the deformation of the net body 2 is suppressed, so that the life of the safety net 1 itself becomes long.

In the example of FIG. 1, the case where the safety net 1 is stretched horizontally is described. However, the use form of the safety net 1 of the present invention is not limited to this, and it is needless to say that the safety net 1 can be stretched vertically. Also in this case,
Due to the force of the elastic ropes 3 and 4 contracting, the safety net 1 becomes in a tensioned state, and there is no sag especially in the vicinity of the lower part, which makes it look good.

[Effect of device]

As described above, in the safety net of the present invention, the outer edge of the net body is surrounded by the elastic ropes, and the proper number of elastic ropes are attached to the internal net body. As a result, the net is divided into individual net blocks whose four corners are supported by elastic ropes, improving the structural strength and efficiently transmitting the force applied to the safety net to the supporting members such as columns. To do. Therefore, the safety net has a long life.

In addition, the elastic rope stretched on the outer edge and inside absorbs the force applied to the safety net by expanding and contracting, so the net is stretched with a slack that expects shock relaxation as in the past. No need. Therefore, the safety net can be stretched under tension, and the appearance of the construction site, construction site, etc. can be improved. Moreover, since the slack is substantially due to its own weight, the amount of rainwater and the like accumulated on the net is small, and the permanent deformation of the net is more reliably suppressed.

[Brief description of drawings]

FIG. 1 shows a state in which the safety net of the present invention is supported by columns, and FIG. 2 shows some examples of elastic ropes attached to the net. 1: Safety net, 2: Net 3,4: Elastic rope, 5: Elastic core 6: Fabric, 7: Core material 8: Spring, 9: Net block A: Strut, B: Fixed rope C: Beam Material, D: Fastening string

Continuation of the front page (56) References JP-A-52-37 (JP, A) Photograph of the contents and drawings attached to the application of Japanese Patent Application No. 62-141745 (Japanese Utility Model Application No. 64-46333) Microfilm (JP, U) Microfilm (JP, U) taken from the contents of the description and drawings attached to the application for Japanese Utility Model Application No. 50-78645 (No. 51-157126, Japan)

Claims (1)

[Scope of utility model registration request] 1. An elastic rope that is stretched elastically in the longitudinal direction across the entire outer edge of the net and the central portion in the longitudinal and lateral directions, and is stretched in a space surrounded by these elastic ropes. A safety net characterized by having a net body.