JP4748626B2 - Impact mitigation device used in shore facilities such as dams, lakes, rivers, harbors, and land facilities - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an impact mitigation device used for applications such as fenders installed on seawalls such as harbors and rivers, mooring materials for ships, and car stoppers in railways.
[0002]
[Prior art]
Conventionally, when a ship touches the connecting shore, a rod-like or spherical fender such as timber or rubber has been attached to the front of the connecting shore to prevent damage to the ship. However, the conventional rod-shaped fenders themselves have a weak absorption of impact force, and thus have the disadvantage that the fenders are damaged by the berthing of the ship. On the other hand, spherical fenders are difficult to install fixedly on the connecting berth, and have been installed exclusively in a suspended state. However, in this case, there are drawbacks such as being damaged by wind and rubbing against the connecting berth.
[0003]
In view of this, the present inventor has previously developed a material in which flexible sheet-like materials are layered in the lateral direction and provided with support plates on both sides thereof (see JP-A-9-273134).
However, this material also has a defect that the end of the flexible sheet-like material layered from repeated impacts is turned up due to repeated impacts, and the impact absorbing power is reduced.
[0004]
[Problems to be solved by the invention]
Therefore, the present inventor has conducted various studies on an apparatus that does not decrease the shock absorbing power even after long-term use, and as a result, the present invention has been completed.
[0005]
[Means for Solving the Problems]
That is, the present invention is an impact reducing device characterized in that a flexible member is provided in a curved shape on an installation surface.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention will be described with reference to the drawings, but the present invention is not limited to the following description.
[0007]
FIG. 1 is a plan view showing an aspect of an impact reducing device according to the present invention. As shown in FIG. 1, an arbitrary number of sheets of flexible sheet-like material 1 (hereinafter referred to as sheet-like material) are stacked in the lateral direction as a flexible member. Fixing metal fittings 2 are applied to both side surfaces of the laminated sheet-like material 1 and tightened.
[0008]
FIG. 2 shows a plan view of the fixture 2 and FIG. 3 shows a longitudinal sectional view thereof. As shown in FIG. 2, the fixture 2 of the present invention includes a bottom plate 3 and a wall surface portion 4, and the shape of the wall surface portion 4 has a gentle wave-like curved shape. The inner edge 5 of the bottom plate 3 has a curved shape. This curved shape is provided so as to be fitted to a curved shape portion with the inner edge portion 5 of another pair of fixing fittings 2.
As the curved shapes of the wall surface portion 4 of the fixing bracket 2 and the inner edge portion 5 of the bottom plate 3, various shapes such as a sawtooth bent shape are adopted in addition to the above shapes.
[0009]
Next, an example of an assembling method of the impact reducing device of the present invention will be described.
Both side portions of the laminated sheet-like material 1 are held by a pair of fixing brackets 2 and 2 shown in FIG. And in order to unite the laminated sheet-like material 1 and the fixing brackets 2, 2, a hole 6 that penetrates the wall surface portions 4, 4 of the fixing brackets 2, 2 and the laminated sheet-like material 1 is provided, The sheet-like material 1 is tightened by inserting a bolt here and tightening with a nut. At this time, it is preferable that a protective tube (not shown) is inserted into the hole 6 so that the hole 6 of the sheet-like material 1 is not damaged by the friction of the bolt, and the bolt is inserted into the protective tube.
[0010]
When the sheet-like material 1 and the fixing brackets 2 and 2 are fastened with bolts and nuts as described above, the inner edges 5 and 5 of the pair of fixing brackets 2 and 2 do not have to be completely fitted to each other. It is sufficient that at least the tops of the curved portions are in contact with each other on the center line 7 between the wall surface portions 4 and 4 of the fixture 2 (see FIG. 4).
[0011]
Further, as shown in FIG. 5, it is preferable to cover with the sheet-like covering material 8 in order to protect the surface of the laminated sheet-like material 1 and prevent the upper end portion of the sheet-like material 1 from being turned up.
[0012]
The sheet material 1 in the impact reducing device of the present invention has a larger impact absorption energy as the protruding portion is longer than the fixing metal 2, whereas if the protruding portion is shorter, the impact absorption energy is decreased and the rebound energy is increased. Therefore, the protruding portion may be appropriately determined depending on the place of use and purpose of use. Moreover, impact energy can be suitably absorbed by making the upper end part of the laminated sheet-like material 1 uneven | corrugated shape.
[0013]
Further, as the sheet-like material 1 used in the present invention, industrial waste such as a waste conveyor belt, a waste tire, and a rubber sheet of a used floatation-type antifouling film can be used.
[0014]
Also preferably flexible member length 1/2 same length from a radius L ₁ wavy pitch L ₂ in the virtual circle curve forms a wave shape as if a wave is shown in FIG. 6 of the present invention Further, a length adjusted within a range of ± 15% is more preferable. The height of the corrugated _{L 3} is 0.13 times the length of the wave pitch _{L 2} is preferred. The tangential angle α of the wave-like top is preferably 120 ° ± 15 °.
[0015]
Further, as the flexible member of the present invention, as shown in FIG. 7, a member composed of an assembly 9 of hexagonal cylinders such as a honeycomb shape can be used. In this case, the hexagonal column is particularly preferably a regular hexagonal column. Furthermore, as another aspect, a structure in which a flexible flat plate 10 having a shape that forms the outer edge portion of the hexagonal column assembly shown in FIG. 7 is provided integrally (FIG. 8).
[0016]
Examples of the flexible member of the present invention include rubber, soft synthetic resin, and the like, and both of these hollow structures and hollow structures are suitably employed. In the case where the flexible member is integrally formed, the fixing bracket 2 is not necessarily required. In this case, a portion H for fixing to the installation surface may be provided at an appropriate location of the flexible member.
[0017]
【The invention's effect】
In the impact reducing device of the present invention, since the flexible member is installed in a curved shape, for example, when impact energy is applied to the wave-like top, the impact energy is absorbed and the reaction force is increased and improved. There is no unreasonable force. In addition, there is an advantage that impact energy is generated repeatedly, and the force of the impact object is intermittently dispersed. Furthermore, the shape retention of the flexible member is also excellent.
The impact reducing device of the present invention can be used as a device for absorbing various impact energies such as a fender, a mooring material for a ship or a fender having a function of stairs.
[Brief description of the drawings]
FIG. 1 is a plan view showing an example of an impact reducing device of the present invention. FIG. 2 is a plan view showing a pair of support plates of the present invention. FIG. 3 is a longitudinal sectional view of a support plate of the present invention. FIG. 5 is a side view showing an embodiment of the impact reducing device of the present invention. FIG. 6 is a side view showing an embodiment of the impact reducing device of the present invention. FIG. 7 is a perspective view showing an impact reducing device using a wave-like flexible member having a hexagonal columnar shape. FIG. 8 is a wavelike flexible member having a hexagonal columnar shape. The perspective view which showed the impact mitigation apparatus which shows the other aspect using the [Description of code]
1. Sheet material 2. Fixing bracket 3. Bottom plate 4. 4. Wall part Inner edge

Claims (1)

A flexible sheet-like material and layered laterally provided on the installation surface, and a gap portion provided heavy layer surface of the flexible sheet-like material to the upper end portion of the layer is a flexible sheet-like material An impact reduction device characterized by covering with a covering material.

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