JPH0440484B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to fenders.

In particular, the present invention provides an impact-receiving head that receives an impact from a ship, support leg walls extending from both sides of the impact-receiving head in a left-right direction in a widening state, and these support legs. A fender made of rubber or rubber-like elastic material, which has separate attachment parts to the quay wall provided at the base of the wall, and each of the attachment parts has metal plates embedded for reinforcement. Related to materials.

In the fender of the above type, when receiving an impact from a ship, the midway portion of the support leg wall bends outward, thereby absorbing the impact. In that case, the bent portion is pushed outward, and the supporting leg wall portion between the bent portion and the mounting portion is warped outward, and as a result, a tensile force is applied to the inner wall surface of the supporting leg wall portion. This tensile force acts in a direction that causes the elastic material to peel off from the buried metal plate material at the attachment point, and may also cause cracks on the inner wall surface near the attachment point, so the durability of the fender may be affected. It was causing a loss. Conventionally, the problem of peeling has been dealt with by applying sufficient adhesion treatment, but even this has not completely prevented peeling, and furthermore, the cost has inevitably increased considerably. In addition, in the above-mentioned conventional fender, for example, if the first impact is carried out from an oblique direction, the left and right support leg walls will develop a habit of different deformation, and after that, normal impact will not occur. The drawback is that uneven buckling is likely to occur even in extreme situations.

The purpose of the present invention is to construct a durable fender that does not cause cracking or peeling as described above even if the supporting leg wall is significantly deformed, and is also resistant to uneven buckling. According to the present invention, this object is to provide a fender of the type described above, in which both supporting leg walls are moved slightly toward the impact receiving head from the location where the metal plate is embedded. This is achieved by interconnecting the mounting portions at the locations with plate-like connecting portions that are approximately parallel to the mounting portions.

According to a preferred embodiment of the present invention, the above-mentioned connection is performed by a plate-shaped body integrally formed with the support leg wall, and the formation position of this plate-shaped connection part is set so that the height of the fender is H. 0.05H from the mounting surface of the mounting part
They are placed at a distance of ~0.2H, and the thickness of the plate-like connection is 0.03H~0.15H.

The present invention will be described in more detail below with reference to the accompanying drawings.

FIG. 1 shows a conventional fender, which is the premise of the present invention, and FIG. 2 shows its operating state. In the figure, reference numeral 1 denotes an impact receiving head that directly receives the impact from the ship, and supporting leg walls 2 extend symmetrically from both sides of the impact receiving head 1 in a state of expanding toward the end. At the base of the supporting leg wall 2, there is a quay wall G.
(See FIG. 2) are formed, and a reinforcing metal plate 4 is embedded in each of these two separately formed mounting portions 3.

The fender described above, which is substantially made of rubber or a rubber-like elastic body, is attached to the quay wall G by fixing its mounting portion 3 to the quay wall G using bolts, nuts, etc., as shown in FIG. 2. When such a fender receives an impact from the ship S on its receiving head 1,
The impact force is absorbed by the supporting leg wall 2 bending outward. When the supporting leg wall 2 bends, a tensile force is generated on the inner wall surface 2, and a relatively large tensile force is generated especially near the mounting part 3 as shown by the arrow, and this tensile force is This acts as a force that peels off the embedded metal plate material and the elastic material, and also as a force that causes cracks in the inner wall surface, and is a factor that impairs the durability of the fender. In addition, because the range in which buckling or bending can occur in this conventional fender is relatively wide, the left and right support leg walls tend to deform differently as described above, and uneven buckling occurs. Easy to occur. In order to avoid this, there is a method of forming the inner wall surface of the support leg wall in a stepped or dogleg shape to actively create a buckling point, but the buckling point formed in this way is Compared to other parts, there was a problem with durability due to the concentration of internal stress.

FIGS. 3 and 4 show an embodiment of the present invention, and the structure of the impact receiving head 1, the supporting leg wall 2, and the mounting part 3 is such that the impact receiving head 1 is attached to the impact receiving surface 5. 80° to
A side wall 6 extending in the direction of the support leg wall 2 at an angle of ~100°
It has the same structure as the conventional one shown in FIG. 1, except that it has .

In addition to the configuration of each of these parts, in the fender according to the present invention, in the vicinity of the attachment part 3, there is a support that is slightly closer to the impact receiving head than the metal plate 4 buried in the attachment part 3. A plate-shaped connecting portion 7 that is approximately parallel to the mounting portion is provided only between the portions of the ramming leg 2. This connecting portion is configured as a plate-shaped member integrally formed with the support leg wall 2. The formation position of this plate-like connecting part 7 is such that, when the height of the fender is H, the distance 1 from the mounting surface 8 of the mounting part 3 is 0.05H to
It is preferable to select the thickness to be 0.2H, and it is preferable that the thickness t of the plate-like connecting portion 7 is selected to be 0.03H to 0.15H.

When the above-mentioned fender according to the present invention receives a shock from a ship, as shown in FIG. Therefore, even if the direction of the initial impact from the ship is from an oblique direction, the bending will occur at approximately the same location as if the impact was from a right angle. However, since deformation that would cause uneven buckling is less likely to occur, and by moving the bending point closer to the impact-receiving head 5, and by the presence of the connecting portion 7, the center of the mounting portion 3 is reduced. The spread of the tensile force to the buried metal plate 4 is significantly limited or reduced, and the risk of peeling is virtually eliminated.

Since the tensile force exerted on the attachment part 3 is reduced in this way, the thickness of the embedded metal plate can be made relatively thin, and in some cases, high hardness rubber can be used instead of the metal plate. can.

As can be understood from the above, according to the present invention, a high performance and durable fender can be provided at a relatively low cost.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a conventional fender, Fig. 2 is a cross-sectional view showing the deformed state of the fender of Fig. 1 upon impact, and Fig. 3 is a cross-sectional view of a fender according to the present invention. The plan view and FIG. 4 are cross-sectional views showing the deformed state of the fender shown in FIG. 3 upon receiving an impact. Explanation of symbols, 1... Impact receiving head, 2... Support leg wall, 3... Mounting part, 4... Embedded metal plate material, 7...
Connecting part.

Claims (1)

[Claims] 1. An impact receiving head that receives impact from a ship, supporting leg walls extending symmetrically from both sides of the impact receiving head in a widening state, and a support leg wall provided at the base of each of these supporting leg walls. and an attachment part to the quay wall,
In a fender made of rubber or rubber-like elastic material, the attachment parts of both bases are separated from each other, and each attachment part is embedded with a reinforcing metal plate. A fender characterized in that the metal plates are connected to each other by a plate-shaped connecting part that is substantially parallel to the mounting part at a place slightly closer to the impact receiving head direction from the place where the metal plate is embedded. .