JPH0430436Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a buffering cable, particularly a buffering cable suitable as a component of a net for preventing submergence in a wave dissipating structure, a road safety fence, etc. .

[Prior art] Background of the invention Conventionally, in wave-dissipating works that are carried out for the purpose of reducing reflected waves or improving calmness at breakwaters, wharves, etc. with vertical wall structures, fishing boats, etc. are In order to prevent small boats, driftwood, etc. from entering the cavity, it is customary to stretch a protective cable such as a chain or rope over the opening of the cavity.

Also, on roads, safety fences with wire rope stretched between iron piles are often constructed as median strips or side protection fences.

Naturally, the above-mentioned protective cables and safety fence facilities include boats,
Since contact or collision with vehicles, etc. is expected, these measures will not only damage the facility itself in the event of an accident, but also minimize damage to the target boat and accidents to the crew.
(b) It has the function of absorbing the impact force received from the boat, vehicle, etc. as much as possible, (b) it does not cause damage to the boat, etc. as much as possible, and (c) this type of protection means. It is desirable to have a structure that allows easy repair of damage that may occur. In addition, the cables constituting the above-mentioned safety fence etc. should preferably have the ability (d) to absorb and alleviate impact forces as a whole.

Problems with the Prior Art Therefore, when considering actual examples of known buffer cables from this perspective, for example, the chain C shown in FIG.
There is a rubber-coated chain (Japanese Utility Model Publication No. 18740, 1983) in which the entire chain is covered with a rubber elastic body R. However, the overall elongation in this precedent is correlated with the inner diameter d in the long axis direction of each ring L constituting the chain and the wire diameter φ. For example, if the inner diameter is 52 m/m and the wire diameter is 13 m/m, 10 rings The elongation of the ring constructed by connecting the rings is calculated assuming that the maximum thickness t of the elastic rubber at the connecting part of each ring is 13 mm, and the amount of deformation δ = 59 mm.
mm, and the elongation rate ξ is only 15%, so even if condition (b) is satisfied, condition (a) is insufficient. Furthermore, in the event that it is cut, the entirety must be replaced, so condition (c) is not satisfied at all.

In addition, as described in Japanese Patent Publication No. 50-25990, an elastic joint for guard fences is known, which has a structure in which a spiral rubber coil is attached to the head of a cylindrical rubber, but since the tensile strength of the rubber alone is small, it can absorb the energy in the event of a collision. is limited and therefore the conditions
Does not satisfy (a). Furthermore, since this relates to the attachment part of the guard fence, the above performance (d) is also lacking.

Furthermore, the device disclosed in JP-A-56942-1981 is merely a V- or S-shaped curve of the coated chain disclosed in JP-A-56942-1981. Therefore, in addition to not satisfying the above condition (A), it also satisfies the same condition (D) as above.
It does not have the performance.

[Purpose of invention]

In view of the above circumstances, the problem that this invention is intended to solve is to satisfy each of the conditions (a) to (c) above, and to
It is an object of the present invention to provide a buffer cable for constructing a safety fence or a protection net that also has the performance described in (d) above.

[Means to solve the problem]

(1) Idea of the invention As a result of considering the structure of the cable that can satisfy the conditions and performance of (a) to (d) above, the inventor of the invention decided to connect the entire cable with a unit rigidity without extensibility. By dividing the rope into a unit rubber block with elasticity and easily and reliably connecting the two, (a) the required elasticity can be freely designed for the entire cable; (b) By appropriately selecting the spacing between unit rubber blocks, it is difficult to cause damage to vehicles that collide or scrape, and in particular, by covering the rigid connecting material between the rubber blocks with rubber, safety is further increased. (c) By connecting the rubber block and the rigid connecting member using a screw method, the connection is ensured, and assembly and repair in the event of damage are simplified;
(d) Since the whole is an extensible macroscopic unit, the collision load can be distributed and supported as a whole, similar to ropes, etc. That is, since no local concentration of stress occurs, we have come to the conclusion that advantages such as a large buffering capacity as a whole should be obtained. The present invention is based on this idea.

(2) Summary of the invention In order to achieve the above-mentioned purpose, the cushioning cable according to the invention is constructed by dividing the whole into a large number of unit solid rubber blocks and unit rubber-coated rigid connecting members. A female threaded socket is integrally buried inside the block, and a male threaded portion provided at the end of the connecting member is screwed into this socket.

(3) Details of constituent elements The solid rubber block, which is one of the constituent elements of the above-mentioned invention, is made of rubber elastic material such as natural or synthetic rubber and can be made into a cube, rectangular parallelepiped, other polyhedron, cylinder, sphere, or spheroid. However, a cylindrical or spheroidal shape is most desirable for the purpose of forming a linear cable, and a spherical shape is most desirable for the purpose of forming a net-like planar structure. A female threaded socket is buried inside them depending on the purpose. If the target is a linear cable, the sockets are located symmetrically on both sides along the axis of symmetry, and if the target is a planar reticular cable, the sockets are placed symmetrically on each side of the two axes of symmetry that are orthogonal to each other. It's the right location. Therefore, specifically, in the case of a cylinder, the inner side of both end faces along the axis, and in the case of a sphere, the two ends perpendicular to each other.
Inside each pole along the axis. In order to increase the tensile strength of this block, it is more preferable that it be reinforced with canvas or the like.

The rigid connecting member is preferably a bar made of steel, the entirety of which is covered with elastic rubber, and both ends thereof are provided with male screws that can be screwed into the sockets. If desired, an engineering plastic bar may be used instead of the steel bar. Note that the bar may be a ring made of a rigid wire, that is, a chain, but in this case, bolts are welded to the rings at both ends in advance.

A cable (or net) of any length (or size) can be made by connecting the above rubber block and the rubber-coated rigid connecting member with the necessary logarithmic screws through the female thread in the socket and the female thread in the connecting member. It is formed.

[Effect]

In the shock-absorbing cable of the present invention, a large number of rubber blocks that are self-stretchable are interposed in the entire cable, and the entire cable has a large amount of extension, and the entire cable can absorb the load due to impact. Since the load is to be borne, it exhibits an excellent buffering effect against the enormous impact load (velocity ² x mass). Figure 5 illustrates this buffering effect.Whether the rubber blocks are cylindrical (A) or spherical (B), the blocks 2, 2... themselves expand in the direction of force. The overall arcuate deformation due to stretching (from large diameter cylinder to small diameter cylinder in Figure B; from spherical to spheroidal shape in Figure B) absorbs the impact force.

In addition, the outer diameter of the rubber block is naturally larger than the outer diameter of the rigid connecting member due to the socket buried inside, so there is a small possibility that the car body, etc. that comes into contact with it will come into contact with the connecting member directly, and even if it were to Also, because of the rubber coating, there is less risk of scratches.

In addition, since the relatively lightweight rubber block and the rubber-covered rigid connecting member can be successively connected, assembly work is easy, and repair work in the event of damage is also easy. In particular, it is a noteworthy advantage that the net-like cushioning cable shown in Example 2 below can be knitted by connecting bidirectional rubber blocks in the weft and weft directions.

〔Example〕

Hereinafter, embodiments of the invention will be specifically explained with reference to Examples, but the examples are merely for explanation and are not intended to limit the idea of the invention.

Embodiment 1 FIG. 1 is a partial perspective view showing an embodiment of the present invention as a linear cushioning cable, and FIG. 2 is a sectional view of a main part of the cable in FIG. 1.

The cable 1 in this example consists of cylindrical solid rubber blocks 2, 2.
. . . and rubber-coated rigid connecting members 4, 4. It is assembled by screwing a male screw 4b cut into the end of the main body (steel bar) 4a of the connecting member into the screw 3a. A reinforcing cloth 5 is buried near the outer periphery of the block 2 so that its cord is diagonal to the axial direction of the block 2, and a male screw 4 is installed around the main body 4a of the connecting material.
A rubber coating layer 6 is applied except for portion b.

Embodiment 2 FIG. 3 is a partial front view showing an embodiment of the present invention as a flat cushioning cable (net). The cable 1 in this example also has a reinforcing cloth 5 on its circumferential surface as in the previous example.
It consists of rubber blocks 2, 2... reinforced by X-X, Y-Y)
There are four connection sockets 3, 3... around the circumference along the
are buried, and each connecting material (rubber coated steel bar with screws) 4
connects each block to a net string.

Figure 4 shows how the above planar buffer cables can be used in wave-dissipating structures.
An example of application to the opening O of the WD is shown.

[Effect of idea]

As explained above, the present invention has the function of absorbing the impact force received from the boat, vehicle, etc. as much as possible, and in doing so, does not cause damage to the boat, etc. as much as possible, and also provides this type of protection. By providing a shock-absorbing cable that has a structure that allows easy repair of damage that may occur, and has the ability to effectively absorb and alleviate impact forces as a whole, it can improve the safety of land and water transportation. Can contribute.

[Brief explanation of the drawing]

Fig. 1 is a partial perspective view showing an embodiment of the present invention as a linear cushioning cable, Fig. 2 is a sectional view of the main part of the cable shown in Fig. 1, and Fig. 3 is a partial perspective view of the present invention as a linear cushioning cable. Figure 4 is a partial front view showing an example in which the flat cushioning cable (net) is applied to the opening of a wave dissipating WD. FIG. 5 is a schematic plan view showing the principle of operation of the cable of the present invention, and FIG. 6 is a partial sectional view showing an example of a known cushioning cable. The meanings of the symbols in the diagram are as follows: 1...Buffer cable (entire), 2...1 solid rubber block, 3...2 connection socket, 3a...
...3 female thread groove, 5...2 reinforcing cloth, 4...1 rubber coated connecting material, 4a...4 main body, 4b...4
external thread, 6...4 coating layer, WD... wave dissipator,
O...Opening of WD, C...Known buffer cable, L
...C ring, R...C covered rubber elastic body.

Claims (1)

[Claims for Utility Model Registration] 1. The whole is divided into a large number of unit solid rubber blocks and unit rubber-covered rigid connecting members, and a female threaded socket is integrally embedded inside the solid block. . A cushioning cable characterized in that a male threaded portion provided at an end of the connecting member is screwed into the socket. 2. The cable according to claim 1, wherein the unit rubber-coated rigid connecting member is connected to both ends of the unit solid rubber block. 3. The cable according to claim 1, in which the unit rubber-covered rigid connecting members are connected to the left and right, upper and lower sides of the unit solid rubber block. 4. The cable according to any one of claims 1 to 3 of the utility model registration claim, in which the unit solid rubber blocks are reinforced with reinforcing cloth.