JP4121721B2 - Fiber net - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fiber net, and more particularly to a fiber net that can be easily inserted through a support member such as a column or a rope and can be stretched with an optimum tension.
[0002]
[Prior art]
The fiber net is spread below the scaffolding etc. of the construction site to prevent workers working at high altitudes from crashing into the ground when they fall off their feet, or accidentally hand tools from high altitudes It is known to use as a safety net in order to prevent a worker from being injured by hitting a worker or the like below when a small article such as the above is dropped.
[0003]
In this safety net, the extension rope is inserted in the mesh around the safety net in advance, and the extension rope is pulled until the optimum tension is obtained. It is extended by locking. Here, with the increase in the number of buildings in recent years, there is a possibility that falling objects may fall from higher places than before. In such a case, even if it is a small object, if it hits a worker below, the injury to the worker will be large. Therefore, the mesh forming the safety net is made smaller.
[0004]
Also, not only safety nets, but also nets such as fishing nets for catching small fish and ball-proof nets for receiving small balls such as ping-pong balls and golf balls are all small to achieve their use. It is configured.
[0005]
[Problems to be solved by the invention]
However, as described above, when the mesh of the fiber net such as the safety net is configured to be small, it becomes difficult to insert the support member such as a support or rope for extending the fiber net into the mesh, and the fiber net is stretched. There was a problem that it took time and effort. Moreover, extensibility is mentioned as one of the characteristics of a fiber net. However, due to its extensibility, it is difficult to judge sensuously whether or not it is stretched with an appropriate tension. And when it was stretched with an inappropriate tension, there was a problem that the performance inherent to the fiber net could not be fully exhibited.
[0006]
The present invention has been made to solve the above-described problems. Even when the mesh is finely formed, a support member such as a support column or a rope can be easily inserted and an optimum tension state can be obtained. The purpose is to provide a fiber net that can be spread on.
[0007]
[Means for Solving the Problems]
In order to achieve this object, the fiber net according to claim 1 is stretched between support members such as columns or ropes, and is disposed between the support members and formed into a fine mesh. It is composed of a narrow part and a mesh smaller than the mesh of the fine part, and includes a stretch degree confirmation unit for confirming the stretch degree of the fine part.
[0008]
[0009]
According to a second aspect of the present invention , in the fiber net according to the first aspect, when the extension degree confirmation portion is tensioned, the mesh of the fine portion is extended in a substantially square shape.
[0010]
[0011]
[0012]
[0013]
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view of a safety net 1 according to a first embodiment of the present invention. 1 shows a state in which the safety net 1 is slightly extended in the X direction (vertical direction in FIG. 1) for easy understanding, and a part of the safety net 1 is omitted.
[0015]
First, the overall configuration of the safety net 1 will be described with reference to FIG. The safety net 1 is a net knitted using nylon or polyester. In order to prevent accidents of workers working at high altitudes and injury accidents due to falling objects such as hand tools from high altitudes, they are stretched under the scaffolding at construction sites. The safety net 1 includes a fine mesh portion 2 knitted into a mesh of a predetermined size, and a coarse mesh portion 3 knitted into a mesh coarser than the mesh of the fine mesh portion 2. Note that the mesh yarn denoted by reference numeral 6 is due to manufacturing convenience for forming the coarse portion 3.
[0016]
The narrow part 2 is a part for receiving a fallen object such as an operator or a hand tool dropped from a high place. Most of the safety net 1 is composed of this fine portion 2. The fine mesh portion 2 is configured in a plurality of meshes arranged in a lattice pattern, and one mesh is formed in a substantially rectangular shape. The lengths of the four sides forming the substantially rectangular shape are substantially equal, and each side length is about 15 mm.
[0017]
In consideration of strength, weather resistance and the like, the net yarn constituting the fine mesh portion 2 is knitted using nylon or polyester synthetic fiber, and the thickness thereof is about 1.7 mm. The material of the mesh constituting the narrow portion 2 is not limited to nylon or polyester as long as a predetermined strength can be secured, and synthetic fibers such as polyamide and aramid may be used. In order to improve the strength, carbon fiber or super fiber may be combined with the above synthetic fiber, or two or more kinds of synthetic fibers may be mixed and used.
[0018]
The coarse part 3 is a part for inserting a support member such as a support or a rope. Circumferentially provided at the end of the narrow portion 2 and arranged in a mesh shape connected in a row in the hanging width direction (vertical direction in FIG. 1) and the length direction (horizontal direction in FIG. 1). Yes. One mesh in the length direction (left-right direction in FIG. 1) is formed in a substantially rectangular shape. The lengths of the four sides forming the substantially rectangular shape are substantially equal, each side length is about 30 mm, and the side length is about twice as long as the mesh of the fine portion 2. That is, the mesh in the length direction has a size approximately four times as large as the mesh of the fine portion 2. As is clear from FIG. 1, at least one side of the mesh in the length direction is a mesh that forms the end of the narrow portion 2, and is formed by a mesh of two sides that are connected.
[0019]
On the other hand, one mesh in the hanging width direction (vertical direction in FIG. 1) is formed in a substantially rectangular shape. The two side lengths forming the substantially rectangular shape are substantially equal, each side length is about 30 mm, and the side length is about twice as long as the mesh of the fine portion 2. The other two side lengths are substantially equal, and each side length is about 15 mm, and is configured to be substantially equal to the mesh of the fine portion 2. That is, the mesh in the hanging width direction is approximately twice as large as the mesh of the fine portion 2.
[0020]
The net yarn constituting the coarse portion 3 is knitted using a synthetic fiber of nylon or polyester, like the net yarn constituting the fine portion 2. The net yarn constituting the coarse portion 3 and outside in the length direction (left and right direction in FIG. 1) is constituted by a net yarn amount more than twice the net yarn constituting the fine portion 2. In addition, the material of the net yarn of the coarse portion 3 is not limited to nylon or polyester, and may be made of various materials like the fine portion 2. Further, the coarse portion 3 is not limited to being arranged in each of the hanging width direction (up and down direction in FIG. 1) and the length direction (left and right direction in FIG. 1), and the hanging width direction (up and down direction in FIG. 1). Or you may arrange | position in any one of a length direction (left-right direction of FIG. 1). Further, when the fine portion 2 is formed widely, it is not limited to the case where the coarse portion 3 is disposed at the end of the fine portion 2, and the coarse portion 3 is provided in a new part such as the central portion of the fine portion 2. May be.
[0021]
Next, a specific method of using the safety net 1 will be described with reference to FIG. FIG. 2 is a front view of the safety net 1 extended by the extension rope 4. The four extending ropes 4 are inserted into the meshes of the coarse portion 3 that are provided in the hanging direction (the vertical direction in FIG. 1) and the length direction (the horizontal direction in FIG. 1) of the fine portion 2 respectively. The The stretch rope 4 is made of synthetic fiber such as nylon or polyester in consideration of strength, weight, etc., and has a thickness of about 10 mm in diameter. Since the mesh size of the coarse portion 3 is larger than that of the fine portion 2, when the fine mesh portion 2 and the coarse portion 3 have the same size as in the prior art, In comparison, the extension rope 4 can be easily inserted.
[0022]
When the extension rope 4 is inserted into the coarse portion 3, the extension rope 4 is pulled so that the mesh of the fine portion 2 is formed in a substantially square shape. This is because the state in which the mesh of the fine part 2 is formed in a substantially square shape is that the impact applied to the fine part 2 is evenly distributed on the four sides of the fine part 2 and the impact can be absorbed efficiently. When the mesh of the narrow portion 2 is formed in a substantially square shape, the extending rope 4 is locked to a stretched hardware (not shown) previously attached to a beam or the like of the building in that state.
[0023]
Thus, the safety net 1 is stretched under the scaffolding of the construction site. Since the mesh of the narrow portion 2 is extended in a substantially square shape with a side length of about 15 mm, not only workers but also small items such as hand tools can be received. On the other hand, a mesh of this size is not easily affected by the wind. Further, since the mesh of the coarse portion 3 is configured to be larger than the stretch rope 4, the mesh of the coarse portion 3 and the stretch rope 4 still remain even if the mesh of the coarse portion 3 is inserted through the stretch rope 4. There is a gap 3a between them. Therefore, even when an operator or the like falls, the gap 3a serves as a cushion and can absorb an impact.
[0024]
In addition, when there is a possibility that small items such as hand tools may fall from the gap 3a of the rough portion 3 through which the extending rope 4 is inserted, the fine portions 2 of other safety nets overlap below the rough portion 3. By spreading the fallen object, it is possible to prevent the fallen object from falling from the mesh gap 3a of the coarse portion 3.
[0025]
Next, the safety net 11 according to the second embodiment of the present invention will be described. FIG. 3 is a front view of the safety net 11 of the second embodiment. 3 shows a state where the safety net 11 is slightly extended in the Y direction (vertical direction in FIG. 3) for easy understanding, and a part of the safety net 11 is omitted.
[0026]
First, the overall configuration of the safety net 11 will be described with reference to FIG. The safety net 11 of the second embodiment is used for the same application as the safety net 1 of the first embodiment, and is a net knitted using nylon or polyester. The safety net 11 includes a fine mesh portion 2 knitted into a mesh of a predetermined size, a coarse mesh portion 3 knitted into a coarser mesh than the mesh of the fine mesh portion 2, and a stretch degree confirmation portion 5. .
[0027]
That is, the safety net 11 of the second embodiment is the same as the safety net 1 of the first embodiment in FIG. 1 except that the extension degree confirmation unit 5 replaces the rough portions 3 arranged in the hanging width direction (vertical direction in the figure). It is different from the safety net 1 of the first embodiment in that it is arranged. Therefore, the same parts as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.
[0028]
The extension degree confirmation unit 5 is a part for confirming the extension degree of the narrowed portion 2. The extension degree confirmation unit 5 is arranged in a mesh shape connected to each end of the narrow portion 2 in the hanging width direction (vertical direction in FIG. 3) in one row. The one mesh is formed in a substantially rectangular shape. The lengths of the four sides constituting the substantially rectangular shape are substantially equal, and each side length is about 11 mm. That is, it is configured to be approximately 0.7 times the mesh of the fine portion 2 having a side length of about 15 mm. A method for setting the side length of the mesh in the extension degree confirmation unit 5 will be described later.
[0029]
Further, the net yarn constituting the stretch degree confirmation unit 5 is knitted using nylon or polyester synthetic fiber, like the net yarn of the fine portion 2 and the net yarn of the coarse portion 3. In addition, the material of the screen yarn of the stretch degree confirmation unit 5 is not limited to polyester, and may be made of various materials like the fine part 2 and the coarse part 3. Moreover, in order to improve intensity | strength, you may comprise not only in 1 row but in multiple rows.
[0030]
Next, a specific method for using the safety net 11 will be described with reference to FIG. FIG. 4A is a front view of the safety net 11 extended by the extension rope 4. The two extending ropes 4 are inserted through the coarse portion 3 disposed in the length direction (left and right direction in FIG. 4) of both ends of the fine portion 2. When the extension rope 4 is inserted into the rough portion 3, the extension rope 4 is pulled until the mesh of the extension degree confirmation portion 5 is tensioned (until it is formed in a substantially linear shape).
[0031]
Here, with reference to FIG. 4B, description will be given of the fact that the length of one side of the mesh of the extension degree confirmation unit 5 is set to be approximately 0.7 times the length of one side of the mesh of the fine portion 2. FIG. 4B shows an enlarged view of the region R in FIG.
[0032]
As described above, the state in which the mesh ABCD of the narrow portion 2 is formed in a substantially square shape is the optimal tension of the safety net 11. However, it is difficult to sensuously form the mesh of the fine portion 2 into a substantially square by adjusting the tensile force of the extension rope 4. On the other hand, in general, it is easy to determine whether or not the tension rope 4 is tensioned by pulling the extension rope 4. Therefore, if the mesh of the stretch confirmation unit 5 is in a tensioned state, one side of the mesh of the stretch degree confirmation unit 5 is set so that the mesh of the fine unit 2 is formed in a substantially square shape.
[0033]
That is, assuming that one side length of the mesh ABCD of the fine part 2 is a, the side length of the diagonal line AC of the mesh ABCD can be obtained by adding a to the square root of 2, which can be expressed as approximately 1.4a. be able to. Here, when the mesh EFGB of the extension degree confirmation unit 5 is tensioned, the mesh EFGB of the extension degree confirmation unit 5 is formed linearly. That is, since the angle EBG of the mesh EFGB of the extension degree confirmation unit 5 can be regarded as approximately 180 degrees, the side length of the side EBG of the mesh EFGB of the extension degree confirmation unit 5 is equal to the side length of the diagonal line AC of the mesh ABCD. It becomes almost the same and can be expressed as about 1.4a. Accordingly, the one side length of the mesh EFGB of the extension degree confirmation unit 5 having substantially the same four side lengths is set to about 0.7a which is half of about 1.4a.
[0034]
In the state in which the mesh of the extension degree confirmation portion 5 is formed in a substantially straight line, that is, in the state in which the mesh of the fine portion 3 is substantially square, the extension rope 4 is installed in advance on a building beam or the like. The safety net is stretched with a hardware (not shown).
[0035]
In this way, if the safety net 11 is in a state in which the mesh of the extension confirmation unit 5 is in a tensioned state (a state formed in a straight line), the safety net 11 can be easily and sensibly formed with an optimal tension. Can be extended. In addition, since the stretch confirmation part 5 is arranged in place of the coarse part 3, the stretch confirmation part 5 that is tensioned can be used in place of the stretch rope 4.
[0036]
Thus, since the mesh of the coarse part 3 for inserting the extension rope 4 into the safety nets 1 and 11 is configured to be larger than the mesh of the fine part 2, the extension rope can be easily inserted. . Therefore, the safety net 1 can be stretched well. Further, since the extension confirmation section 5 is provided on the safety net 11, even an unskilled worker can easily and easily extend the safety net 11 to the optimal tension. it can. As a result, the stretched safety net 11 is stretched without being pulled too much or loosened, and the characteristics according to the specification value (design value) can be surely exhibited.
[0037]
The present invention has been described above based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications and changes can be easily made without departing from the spirit of the present invention. Can be inferred.
[0038]
For example, in the above-described embodiment, the case where the stretch degree confirmation unit 5 is arranged in place of the coarse portion 3 has been described. However, it is not always necessary to dispose the extension degree confirmation unit 5 in place of the coarse portion 3, and it may be separately arranged at a new site such as the central portion of the fine portion 2. Moreover, in order to clarify that it is the extension degree confirmation part 5, you may comprise so that the detail part 2 and a color may be distinguished. Further, the form of the stretch confirmation unit 5 is not limited to a mesh shape, and a thread or the like corresponding to the side length of the diagonal line when the mesh of the fine portion 2 is formed in a substantially square shape is stretched on the diagonal of the mesh of the fine portion 2. You may comprise so that it may provide.
[0039]
Further, in each of the above-described embodiments, only the outer mesh yarn is thicker than the mesh yarn of the fine mesh portion 2 among the coarse mesh portion 3 arranged in the length direction (left and right direction in FIGS. 1 and 3). Explained when to do. However, the thickening mesh yarn is not limited to the mesh yarn of such a part, and all the mesh yarns constituting the mesh of the coarse portion 3 may be made thick, and the coarse portion 3 and the fine portion 2 are common. The mesh thread to be made may be thick. In such a case, there is an effect that the strength of the safety net 1 can be further improved.
[0040]
Further, in each of the above embodiments, the fiber net of the present invention has been described as the safety nets 1 and 11 for preventing a worker or the like from falling, but the fiber net is limited to use as the safety nets 1 and 11. Needless to say, it can be used as a fishing net or a ball-proof net. In such a case, the mesh of the narrow portion 2 is formed in a size corresponding to each application.
[0041]
【The invention's effect】
According to the fiber net of claim 1, the stretch degree confirmation unit is configured with a mesh smaller than the mesh of the fine part, so that the mesh of the fine part is greater than when the mesh of the stretch degree confirmation unit is strained. Is not extended. Therefore, the mesh of the fine portion is excessively tension, there is an effect that it you to prevented from being deployed in an improper state.
[0042]
According to the fiber net of claim 2, in addition to the effect of the fiber net according to claim 1, when the stretch degree confirmation part is tensioned, the mesh of the narrow part is stretched in a substantially square shape. The mesh of the part can be extended with the optimal tension. That is, in the case of forming a network of fine portion substantially square, the force applied to each side of the mesh of the fine portion is evenly distributed, there is an effect that it you to efficiently absorb impact forces.
[0043]
[0044]
[0045]
[0046]
[Brief description of the drawings]
FIG. 1 is a front view of a safety net in a first embodiment of the present invention.
FIG. 2 is a front view showing a state in which the safety net in the first embodiment of the present invention is stretched by a stretch rope.
FIG. 3 is a front view of a safety net in a second embodiment of the present invention.
FIG. 4 (a) is a front view showing a state in which the safety net in the second embodiment of the present invention is extended by an extension rope. (B) is an enlarged view of the narrow part in the area | region R of (a).
[Explanation of symbols]
1,11 Safety net (textile net)
2 Fine section 3 Coarse section 4 Extended rope (supporting member)
5 Extension degree confirmation section

Claims (2)

In a fiber net that is stretched between support members such as struts or ropes,
A fine line portion disposed between the support members and formed in a fine mesh;
A fiber net comprising a mesh smaller than the mesh of the fine mesh portion, and further comprising a stretch degree confirmation portion for confirming a stretch degree of the fine mesh portion. Fiber net according to claim 1 wherein the stretched approximately confirmation section when it is tensioned, the mesh of the fine portion is characterized in that it is stretched in a substantially square shape.

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