JPH0448887B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fender, and more particularly to an improvement in a floating fender formed into a bale shape.

In the first place, this type of fender is constructed by molding a rubber-like elastic body with a reinforcing layer embedded into the shape of a bale, and enclosing air or foam material inside to give it buoyancy. By mooring to an underwater structure such as a bridge pier via mooring devices such as guy ropes attached to the left and right mirrors, when a floating object such as a ship or driftwood collides with this underwater structure, the impact energy is absorbed. absorb,
While it is possible to prevent damage to ships, it is also possible to protect underwater structures, and by mooring them to a quay, it is possible to reduce the impact when a ship comes berthed.

However, conventional fenders with the structure described above had the following drawbacks: (1) According to the results of research by the present inventors,
Thickness of 100 to 150 mm is applied to the underwater part of the fender during this period.
Seaweed and shellfish adhere to the fender, which changes the water retention of the fender, making it impossible to maintain optimal buffering performance.

(2) Removing these deposits is extremely difficult and requires a lot of cost.

(3) Also, it takes a lot of effort to maintain it when it wears out or gets damaged.

(4) The surface becomes discolored within a short period of time, resulting in poor appearance.

The present invention was developed as a result of studies to solve the above-mentioned problems.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an excellent fender material that can be removed very easily even if seaweed or shellfish adhere to it, and that is robust and durable for long-term use.

That is, the present invention consists of a rubber-like elastic body in which a reinforcing layer with a bias structure is embedded in the outer circumferential surface of the body of a fender main body formed into a hollow bale shape, in which a rubber-like elastic body in which a reinforcing layer is embedded is embedded. The gist of the fender is a fender characterized by a protective cylinder having a plurality of independent protective layers stacked so that they can be peeled off from each other.

Hereinafter, the present invention will be specifically described by way of examples with reference to the drawings.

Figures 1 to 6 show fenders made of various embodiments of the present invention. Figure 1 is a partially cutaway front view explanatory view of the first embodiment, and Figures 2a and 2b are Components of the same fender are shown, where a is an explanatory front view of the fender main body, b is an explanatory front view of the protective layer, and FIG. 3 is an enlarged cross-sectional view taken along the line A-A in FIG. 2 b. Figure 4 a and b
1 shows a reinforcing layer embedded in the protective layer, a is an explanatory front view showing the state before the protective layer is attached to the fender main body, and b is an explanatory front view showing the state after attachment. Further, FIG. 5 is a front view explanatory diagram of the second embodiment,
FIG. 6 is an explanatory front view of the third embodiment.

In the figure, Ea, Eb, and Ec are respectively fenders made of each embodiment of the present invention, which are made by molding a rubber-like elastic body with a reinforcing layer K embedded into a hollow bale shape and sealing air a inside. A plurality of protective layers 21 made of a rubber-like elastic body with a reinforcing layer V of a bias structure embedded therein are made independent of each other and can be peeled off from each other on the outer circumferential surface of the trunk 10a of the shelving main body 10 so as to cover this. It is constructed by fitting protective cylinders 20 stacked in the following manner.

To further explain this structure, in this embodiment, in order to impart buoyancy to the fender main body 10, air a is press-fitted inside, and as shown in FIG. The outer diameter after
The length of the straight body portion 11 is expressed as La.

The inner diameter Db of the protective cylinder 20 is such that the protective cylinder 20
In order to prevent the protective cylinder 20 from falling off when the fender main body 10 is inflated as described above, it is desirable to set the protective cylinder 20 to satisfy the relationship 0.3Da≦Db≦Da.

Further, the length Lb of the protective cylinder 20 is set to satisfy the relationship Lb≦La in this embodiment.

Furthermore, the reinforcing layer V of the protective cylinder 20 has a bias structure, as shown in FIGS. The cords have a structure in which they intersect with each other at a predetermined angle.

In this embodiment, each code Va and
The cord angle of Vb is set to satisfy the relationship θa≦θb, where θa is the cord angle when the fender main body 10 is not inflated, and θb is the cord angle when it is in an inflated state. There is.

According to the results of experiments conducted by the inventors of the present invention, the θa is preferably set in the range of 10 to 70°,
More preferably, the angle is set within the range of 40 to 60 degrees.

This is because if θa is less than 10°, the effect is only that of wrapping the fender main body 10 with a blind, and if it exceeds 70°, the resistance when the fender main body 10 is expanded becomes too large.

Next, the manufacturing process of the above-mentioned fender material will be briefly explained.

First, the straight body portion 1 of the fender main body 10 in a non-inflated state
1, the protective cylinder 20 which is also in an uninflated state is inserted, and then air a is pressurized into the fender main body 10. Then, at the same time as the fender body 10 expands, the cord angles of the cords Va and Vb of the reinforcing layers V embedded in the protective layers 21 constituting the protective cylinder 20 change from the state shown in FIG. 4 a to b. The protective cylinder body 20 also becomes in an expanded state. As a result,
Each protective layer 21 can be easily peeled off by utilizing shrinkage caused by a change in bias angle. Moreover, as shown in FIG. 1, the protective cylinder 20 can be securely fixed to the straight body part 11 of the fender main body 10.

Next, another embodiment of the present invention shown in FIGS. 5 and 6 will be briefly described. In the second embodiment shown in FIG. It is formed longer than the length La of the straight body part 11 of the fender main body 1 at both ends of this protective cylinder body 20.
This is an example in which a part of the mirror part 13 of No. 0 is covered.
In the third embodiment shown in the figure, the protective cylinder 20 is divided into a plurality of parts in the longitudinal direction (in this embodiment, it is divided into three parts).
20a20b20c) and is fitted to the straight body portion 11 of the fender main body 10.

Note that a convex portion may be formed at a required position on the fender main body 10 described above to prevent the protective cylinder 20 from separating from the straight body portion 11 of the fender main body 10.

The above examples were examples of fenders according to the present invention in which a rubber-like elastic body was molded into a hollow bale shape and air was sealed inside. The fender according to the invention may be constructed as follows.

That is, the fender main body 10 is made of a rubber-like elastic body formed in advance into a hollow bale shape, and a foam material is sealed inside.
While the fender main body 10 is contracted by applying negative pressure inside the fender, a plurality of protective layers 21 each made of a rubber-like elastic body and having a reinforcing layer v having a bias structure similar to that of the above embodiment are made independent. After fitting the protective cylinders 20, which are laminated so that they can be peeled off from each other, into a predetermined position on the outer periphery of the fender main body 10, the fender main body 10 returns to its original exterior by releasing negative pressure. The fender of the present invention can be constructed by restoring the diameter and fitting the protective cylinder 20.

In addition, the protection cylinder 20 having an inner diameter smaller than the outer diameter of the fender main body 10 is mechanically restrained in advance so as to have an inner diameter larger than the outer diameter of the fender main body 10, and the inner peripheral portion thereof is After inserting the fender main body 10 into the fender, the mechanical restraint of the protective cylinder 20 may be removed.

As described above, the present invention provides a rubber-like elastic body in which a reinforcing layer with a bias structure is embedded in the outer peripheral surface of the body of a fender main body, which is formed into a hollow bale shape, with a rubber-like elastic body in which a reinforcing layer is embedded. Protective layer 21 made of elastic material
Since a protective cylinder is fitted in which a plurality of protective cylinders are laminated so that they can be separated from each other independently, the following effects can be achieved. In other words, (1) If seaweed or shellfish adhere to the underwater part of the fender, the seaweed or shellfish can be removed extremely easily and reliably by simply peeling off the protective layer that makes up the protective cylinder from its outer surface. The original optimal buffer performance can be demonstrated. Moreover, since multiple protective layers are laminated, a new protective layer is added to the surface each time seaweed, etc. attaches to the surface, thereby maintaining optimal cushioning performance and easy maintenance performance over a long period of time. can do.

(2) Even if the surface of the fender, that is, the surface layer of the protective tube, is worn out or damaged, it is extremely easy and reliable to simply peel off the protective layer that makes up the protective tube from its outer surface as described above. The surface layer of the fender can be repaired. Therefore, maintenance is easy and economical.

(3) Even if the surface of the fender becomes discolored and its appearance deteriorates, the fender can be removed very easily and reliably by simply peeling off the protective layer that makes up the protective cylinder from its outer surface as described above. The surface layer of the wood can be restored to the same condition as when it was new.

(4) It is possible to easily design a fender according to usage conditions and required life by increasing or decreasing the number of protective layers that make up the protective cylinder.

(5) As mentioned above, the fender main body and protective cylinder are made of rubber-like elastic material with a reinforcing layer embedded, so they are highly wear-resistant, weather-resistant, corrosion-resistant, and impact-resistant. You can get the shelving material.

(6) As mentioned above, the reinforcement layer with the bias structure is embedded in the protective layer constituting the protective cylinder.
The protective cylinder can be securely fixed to the straight body part 11 of the fender main body 10 by simply inflating the fender main body.

(7) Since the protective layers constituting the protective cylinder are laminated so that they are independent and can be peeled from each other, the protective layers can be easily peeled off from the outer surface.

[Brief explanation of drawings]

Fig. 1 to Fig. 6 show fenders made of each embodiment of the present invention, Fig. 1 is a partially cutaway front view explanatory view of the first embodiment, and Fig. 2 a and b are Components of the same fender are shown, where a is an explanatory front view of the fender main body, b is an explanatory front view of the protective layer, and FIG. 3 is an enlarged cross-sectional view taken along the line A-A in FIG. 2 b. Figure 4 a and b
1 shows a reinforcing layer embedded in the protective layer, a is an explanatory front view showing the state before the protective layer is attached to the fender main body, and b is an explanatory front view showing the state after attachment. Further, FIG. 5 is a front view explanatory diagram of the second embodiment,
FIG. 6 is an explanatory front view of the third embodiment. DESCRIPTION OF SYMBOLS 10... Fender main body, 10a... Body of fender main body, 20... Protective cylinder, 21... Protective layer, K...
...Reinforcement layer, V...Reinforcement layer with bias structure.

Claims (1)

[Claims] 1. Consisting of a cylindrical rubber-like elastic body with a bias-structured reinforcement layer embedded in the outer peripheral surface of the body of the fender main body, which is made of a rubber-like elastic body with a reinforcing layer embedded in the shape of a hollow bale. A fender characterized by having a protective cylinder fitted with a protective cylinder in which a plurality of protective layers are laminated so that each layer can be separated from the other.