JP2000062684A - Shock absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the deformation quantity per unit length and enhance the durability by fixing both ends of a safety rope to fittings mounted on the end parts of a shock absorbing body. SOLUTION: A shock absorbing body 1 is formed of an elastically deformable columnar rubber body 11 and a fitting 13 mounted on each end 12 thereof. Each end of a safety rope 3 is mounted on each fitting 13. The thus-constituted shock absorber is used as a film for preventing pollution of the sea, or the shock absorber is connected between the upper end of a curtain mounted on a floating body and suspended therefrom and a cushioning floating body, the motion response in waves of the curtain can be mitigated by the extension of the shock absorbing body 1 together with the oscillation of the cushioning floating body. When the shock absorbing body 1 is broken by an unexpected event, the safety rope 3 is operated to prevent the flowing of the curtain.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber which is used by connecting it to a mooring line of a floating body floating on the sea surface, and more particularly to a shock absorber which can moor the motion response in waves and safely moor the floating body. .

[0002]

2. Description of the Related Art Conventionally, mooring lines having elastic elongation have been used for mooring floating bodies floating on the surface of water or in water. One of such mooring lines is a rubber chain.
This rubber chain is formed by burying a large number of connected annular links in a relaxed state by filling the inside and outside of the links with rubber. Several structures have been proposed for such a rubber chain depending on the state of relaxation of the annular link.

The rubber chains having any structure resist the tensile load by first compressing the rubber filled in the links, and also exerting a cushioning action by the amount of compression. When the tensile load is released, the rubber restores the original shape. The rubber chain can reduce the motion response in waves due to the above-described cushioning action.

[0004]

However, the above rubber chain has the following problems. That is, with respect to the tensile load, since the rubber filled between the links is deformed only by the compression, the deformation amount per unit length is extremely small. Therefore, there is a problem that it is not always sufficient to reduce the motion response in waves. Further, the rubber filled in the link is damaged in a short period of time by repeating compression and relaxation, so that it cannot serve as a rubber chain.

Further, the rubber filled in the links is not only damaged by repeated compression, but also when subjected to a sudden high load, the links are strongly pressed by the links and may be easily damaged. is there. Further, as described above, there is a problem that the deformation amount per unit length is extremely small, the durability is poor, and the manufacturing is time-consuming and expensive.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a shock absorber which has a large amount of deformation per unit length, is easy to install, and can be used safely.

[0007]

In order to achieve the above object, the present invention has the following constitution. That is, the cushioning device according to the present invention comprises a cushioning body made of an elastically deforming columnar rubber body and a safety rope. It is characterized by The buffer body may be formed of one columnar rubber body, a plurality of columnar rubber bodies may be connected in series, or a plurality of columnar rubber bodies may be arranged in parallel. Both ends of the safety rope may be fixed to the mounting bracket via mounting rings. The length of the safety rope is preferably a length according to the extension rate of the buffer. The attachment fitting can be fixed to an embedded fitting embedded in an end portion of the columnar rubber body.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail based on the embodiments shown in the drawings. First, FIG. 1 is a partially sectional front view for explaining the entire apparatus, FIG. 2 is a vertical sectional view for explaining a shock absorber, and FIG. 3 is a front view of a mounting member. The shock absorber K according to the present invention includes a shock absorber 1 that relaxes a motion response in waves due to elastic deformation, and a safety rope 3 attached to the shock absorber.

The cushioning body 1 is composed of a columnar rubber body 11 which is elastically deformable and mounting fittings 1 attached to its ends 12, 12.
3 and 13, the mounting member 13 is attached to an embedding member 14 in which the end face of the columnar rubber body 11 is bulged so that the end surface is exposed. The columnar rubber body 11 can be formed of a rubber-like elastic body such as natural rubber, synthetic rubber, and thermoplastic elastomer. These rubber-like elastic bodies may be one kind or a mixture of two or more kinds. It may be present, and further, short fibers can be mixed.

It is preferable that only the end portions 12 of the columnar rubber body 11 in which the embedding metal fitting 14 is embedded are expanded, and the length dimension can be 3 to 10 times the diameter dimension of the central body portion. As will be described later, the ratio of the length dimension to the central body diameter dimension is appropriately determined depending on whether the columnar rubber body 11 is used alone or a plurality of columnar rubber bodies 11 are connected in series or in parallel. be able to. The extension rate of the columnar rubber body 11 can be set to, for example, 200 to 600%.

The embedded metal fitting 14 is provided with a female screw 14a into which the mounting metal fitting 13 is screwed. Further, it is preferable to provide a protective layer 15 on the outer peripheral surface of the columnar rubber body 11. When the protective layer 15 is provided, during transportation,
It is possible to prevent the columnar rubber body 11 from being damaged during installation work in water or use in water.
The protective layer 15 is made of rubber sheet, plastic sheet, cloth,
It can be formed by coating a metal plate or the like, but in the case of a non-stretchable cloth, a metal plate, or the like, it may be simply covered without being fixed to the columnar rubber body 11 so that it can be slid. .

The mounting member 13 is composed of an annular portion 13a and a fixed portion 13b, and a male screw 13c is formed on the outer peripheral surface of the fixed portion 13b so as to be screwed into the female screw 14a of the embedded member 14. . The mounting bracket 13 and the embedded bracket 14 may be fixed to each other by welding, bonding or the like, instead of being screwed as in the above embodiment.

The safety rope 3 attached to the attachment fitting 13 can be formed of a rope, a chain, a rubber chain, etc., and both ends thereof are attached via attachment rings 4 attached to the attachment fitting 13. Safety rope 3
Is a mooring line in the event that the cushioning body 1 is damaged, its length may be adjusted according to the extension rate of the columnar rubber body 11. Further, the strength of the safety rope 3 is preferably as strong as the mooring rope. The safety rope 3 is made of a single piece such as a rope,
Including safety device.

In the above embodiment, the case where the columnar rubber body 11 is used alone has been described, but the columnar rubber body 11 may be connected in series to form a buffer body. That is, a plurality of columnar rubber bodies 11 are connected in series via the fittings 13, and the safety ropes 3 are attached to both ends of the buffer body formed by connecting these columnar rubber bodies 11. In this way, when the columnar rubber bodies 11 are connected in series, the amount of extension can be increased accordingly. This is effective when high displacement is required. The length of the safety rope 3 in this case may be a length corresponding to the total amount of extension of the columnar rubber body forming the buffer body.

The columnar rubber bodies 11 are connected in series as described above, and when high tension is required, a plurality of columnar rubber bodies 11 may be arranged in parallel to form a buffer body. it can. Further, when a high displacement amount and high tension are required, columnar rubber bodies connected in series can be arranged in parallel. 4 to 6 show a buffer body 1a when three columnar rubber bodies 11 are arranged in parallel. The cushioning body 1 a is an embedded metal fitting 1 embedded in the ends 12 of the columnar rubber body 11.
4 and 14 are brought into contact with the inner surfaces of the mounting brackets 5 and 5, and the embedded bracket
It is formed by screwing a bolt 51 into the female screw 14a and integrally mounting the bolt 51, and slidably disposing a safety bar 55 in place of the safety rope 3.

The mounting member 5 has through holes 54, 54 for inserting the bolts 51, 51 and a through hole 5 for inserting the safety bar 55.
A connecting plate 53 is vertically provided on a disc 52 formed by alternately piercing 6, 56, and an embedding metal fitting 14 embedded in the ends 12, 12 of the columnar rubber body 11 in the disc 52. , 14 are brought into contact with each other, the bolts 51, 51 are inserted through the through holes 54, 54, and screwed into the female screw 14a of the embedded metal fitting 14 to be fixed. On the other hand, the safety bar 55 is inserted into the through holes 56, 56 of the disc 52, and nuts are attached to both ends thereof so as not to drop off.

The length of the safety bar 55 is the columnar rubber body 11.
It may be determined by the elongation rate of. The safety rope 3 in the above embodiment can be used instead of the safety bar 55. The cushioning body 1a may be any one in which a plurality of columnar rubber bodies 11 are arranged in parallel, and when higher tension is required, the cushioning body 1a itself may be arranged in parallel. A plurality of the buffers 1a may be connected in series and used. In this way, when the columnar rubber bodies 11 are combined in parallel and in series to form the buffer body, it is possible to meet the demand for high tension and the demand for high displacement.

Next, the case where the shock absorber according to the present invention is used for a marine pollution prevention film will be described with reference to FIGS. 7 and 8. In FIG. 7, a curtain 61 is attached to the floating body 60 to hang it down, a weight 62 is attached to the lower end of the curtain 61, and a shock absorber K according to the present invention is attached to the upper end of the curtain 61 via a connecting cable 63. The other end of K is attached to the buffer floating body 63 via a connecting cable 64. An upper end of a mooring line 65 is attached to the buffer floating body 63, and a lower end of the mooring line 65 is connected to an anchor 66 installed on the seabed.

As described above, when the shock absorbing device K is used for the marine pollution prevention film, the shock absorbing floating body 63 is shaken and
The extension of the buffer 1 can mitigate the motion response of the curtain 61 in waves. When the shock absorber 1 is damaged due to an unexpected event, the safety rope 3 is actuated and the curtain 6
Prevent 1 from flowing.

FIG. 8 shows the case where the buffer 1 is interposed at an appropriate position of the mooring line. That is, a curtain 69 having a weight 68 attached to the lower end is suspended from the floating body 67, and an upper end of a mooring line 71 whose lower end is connected to an anchor 70 is attached. The shock absorber K according to the present invention is attached to an arbitrary position of the mooring line 71.

In the above example of use, the shock absorber constituting the shock absorber has been described by using the columnar rubber body 11 alone. However, as described above, the shock absorber may be connected in series or in parallel. Alternatively, they may be connected in series and arranged in parallel.

[0022]

As described above, according to the shock absorbing device of the present invention, the motion response of the floating body can be alleviated, and the elastic deformation of the rubber can cope with the initial tension of the mooring line. In addition, the amount of deformation per unit length is extremely large, and by mounting the columnar rubber bodies in parallel, it is possible to withstand high tension. By mounting the columnar rubber bodies in series, it is possible to meet the demand for high deformation amount. it can.

[Brief description of drawings]

FIG. 1 is a front view for explaining the whole device, a part of which is shown in section.

FIG. 2 is a vertical sectional view for explaining a buffer body.

FIG. 3 is a front view of a mounting bracket.

FIG. 4 is a front view in which a part of an embodiment in which columnar rubber bodies are attached in parallel is shown in section.

FIG. 5 is likewise a side view.

FIG. 6 is a perspective view of a mounting bracket.

FIG. 7 is an explanatory side view showing an example of use in a marine pollution prevention film.

FIG. 8 is an explanatory side view showing another example of use of the marine pollution prevention film.

[Explanation of symbols]

1,1a buffer 3 safety rope 4 mounting ring 5 Mounting bracket 11 columnar rubber body 12 end 13 Mounting bracket 13a annular part 13b Fixed part 13c male screw 14 Embedded metal fittings 14a Female screw 15 Protective layer 51 bolts 52 disk 53 Connection plate 54 through hole 55 Safety Bar 56 through hole

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takusa Shinoda             No. 1 Nobezawa, Kaisei-cho, Ashigarakami-gun, Kanagawa Stock             Company Meiji Rubber Kasei Head Office Factory (72) Inventor Akira Ariga             2-7-4 Yoyogi, Shibuya-ku, Tokyo Stocks             Company Meiyu Industry Sales F term (reference) 3J066 AA01 AA22 BA01 BB01 BC01                       BD05 BE10

Claims (7)

[Claims] 1. A shock absorber comprising a columnar rubber body that elastically deforms and a safety rope, both ends of which are fixed to mounting fittings attached to the ends of the cushion. Shock absorber. 2. The shock absorber according to claim 1, wherein the shock absorber comprises one columnar rubber body. 3. The shock absorber according to claim 1, wherein the shock absorber comprises a plurality of columnar rubber bodies connected in series. 4. The shock absorber according to claim 1, wherein the shock absorber comprises a plurality of columnar rubber bodies arranged in parallel. 5. The both ends of the safety rope are fixed to a mounting bracket via mounting rings.
The shock absorber according to claim 4. 6. The length of the safety rope is set according to the extension rate of the buffer body.
The shock absorber according to any one of 1. 7. The mounting member is mounted by being fixed to an embedded member embedded in an end portion of the columnar rubber body, according to any one of claims 1 to 6. The shock absorber described.