JPH0756055Y2 - Cushioning material for protection - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow-molded cushioning material which is attached to a protective fence for danger prevention, a pillar of a scaffold at a construction site, or the like to reduce the impact at the time of collision.

[0002]

2. Description of the Related Art In sports involving high speed, for example, when a collision is made on a prop or a prop of a gym equipment when a protective fence or net is provided around a playground or a dangerous area of a ski resort. In many cases, a cushioning material is provided to soften the shock received. In addition, at the ends and corners of the scaffolding pillars, etc., where people pass through at the construction site, conspicuous tape was wound around or a cushioning material was attached to prevent danger. Examples of the cushioning material include, for example, Japanese Utility Model Publication No. 60-252831 and Japanese Utility Model Publication No. 6
Some are disclosed in Japanese Patent Publication No. 1-20318.
These generally use a foamed elastic body as a shock absorber and a highly durable material on the surface.

[0003]

However, in general, these cushioning materials are rarely removed once installed, and are often left installed for a long period of time. for that reason,
Even if the elastic body of the foam changes over time and the shock absorption capacity is significantly reduced, you may not notice it, or the performance may vary depending on the environment of the installation location, such as a place where the temperature changes drastically or a place with a large amount of UV irradiation, or indoors. Sometimes I did not notice that there was a difference in the degree of deterioration, which caused management problems. In the case of using the buffering force of air pressure, for example, in a ski season after being exposed to direct sunlight in the summer at a ski resort, etc. However, there is also a problem in that the internal air pressure changes to change the shock absorbing power, and in some cases, sufficient shock absorbing power cannot be obtained. An object of the present invention is to provide a cushioning material for protection that can obtain a stable shock absorbing force.

[0004]

Therefore, in the protective cushioning material according to claim 1 of the present invention, a protective cushioning material is formed in which two hollow molded bodies are engaged with each other with a column therebetween to form a cylindrical body. In the above, the molded body is characterized in that a plurality of annular projections having a diameter smaller than the diameter of the support and annular recesses having a diameter larger than the diameter of the support are alternately provided on the peripheral wall in contact with the support.

Further, in the protection cushioning material according to claim 2,
The cushioning material for protection according to claim 1, wherein an air pressure adjusting mechanism is provided on an end surface portion of the molded body, and the air pressure adjusting mechanism has through-holes penetrating the inside and outside of the molded body, and through-holes and gaps. Equipped with a valve that is urged to face each other, and when the internal pressure suddenly rises due to impact on the molded body,
A valve closes the through hole.

[0006]

Therefore, in the protection cushioning material according to the first aspect of the present invention, the circumferential wall which is in contact with the support is alternately provided with the annular projection having the diameter smaller than the diameter of the support and the annular recess having the diameter larger than the diameter of the support. Since a plurality of them are provided in the column, even if the diameter of the support column changes, when the cylindrical body is engaged, the annular protrusion of the molded body is pressed against the support column so that the cylindrical body can be fixed. Further, an excellent shock absorbing force can be obtained by the combined action of the shock absorbing force due to the deformation of the annular recess of the molded body and the shock absorbing force due to the air pressure inside the hollow molded body. Further, in the protective cushioning material according to the second aspect, the air pressure adjusting mechanism reduces the air pressure change caused by the expansion and contraction of the air inside the molded body due to the temperature change, and also causes the air expansion when the temperature rises. Prevents changes in the shape of the molded body.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention is shown in the perspective view of FIG. In FIG. 1, a hollow molded body having flexibility (hereinafter,
The hollow molding cylinder 1) is formed by blow molding using a plastic material having flexibility and weather resistance such as polyethylene. The hollow molded cylinder 1 has a central hole 2 penetrating therethrough, and includes the axial center line of the central hole 2.
A plurality of protrusions 3 and a plurality of recesses 4 that fit into the protrusions are provided on each of the divided surfaces divided into two in the axial centerline direction, and the protrusions 3 are sandwiched and fixed by a fastening member (not shown).

On the peripheral wall 6 having the central hole 2 penetrating therethrough,
A plurality of annular projections 7 having a diameter smaller than the diameter of the support pillars and a plurality of annular recesses 9 having a diameter larger than the diameter of the support pillars are alternately provided, and the outer peripheral wall 8 facing the annular projections 7 has an axial direction. An annular protrusion 10 having a curved cross section is provided. Then, the two hollow molded cylinders 1 are engaged with each other to support the pillar 5
When it is sandwiched between the two, the annular protrusion 7 presses and holds the support column 5.

The hollow molded tubular body 1 having the above-described structure can obtain an excellent shock absorbing force due to the characteristics of the flexible material, the internal air pressure, and the shape of the tubular body. Details in Figure 2
This will be described with reference to the sectional configuration diagram of FIG. When an impact force as shown by an arrow A in the figure is applied to the first wall formed by the annular protrusion 10, the annular protrusion 10 having a rib structure is appropriately deformed to compress the internal air. Absorbs the impact force. However, in the case of a large impact force that cannot be absorbed due to the compressive force of the air or the deformation of the annular protrusion 10, the annular recess 9 that is the second wall deforms and absorbs the impact, and the impact on the column Power is greatly reduced.

Further, when used outdoors for a long period of time or in a place where there is a large temperature difference, as shown in the sectional view of FIG. 6, the air pressure is adjusted on the end face portion 11 of the hollow molded cylinder 1. The one provided with the mechanism 12 is used. This air pressure adjusting mechanism 12 is provided with a through hole 13 penetrating the inside and the outside of the hollow molded cylindrical body 1, and a spring for urging the through hole 13 so as to be engaged with the through hole 13 to maintain the penetrated state. 14
The valve 15 to which is attached is disposed.

The air pressure adjusting mechanism 12 is provided with a valve 1 when the air pressure inside the hollow molding cylinder 1 is rapidly increased by a shock.
5 slides in the direction of closing the through-hole 13 by pressure and closes the through-hole 13, and serves to prevent the air flow arrow and maintain the shock absorbing force by compression. The through-pores 13 that normally penetrate the inside and outside of the hollow molded cylinder 1 prevent changes in the characteristics of the cushioning material due to expansion and contraction of air caused by temperature changes. The air pressure adjusting mechanism may be simplified by elastic pieces arranged so as to face each other so that the through pores can be closed inside the hollow molded cylinder 1.

[0012]

Further, as shown in the perspective view of FIG. 4 as the shape of the hollow molding cylinder, the outer peripheral wall 18 of the hollow molding cylinder 17 having flexibility is formed by a plurality of annular projections 19. But good.

In addition, the plastic material for forming the hollow molded tube is mixed with a paint for dyeing, or the surface of the plastic material is colored to make it noticeable, or the zones of the ski area are colored in different colors. You can also build a slope that is rich in fashion.

[0015]

As described above, according to the present invention, an excellent shock absorbing force can be obtained depending on the shape of the hollow molded body and the air pressure. Further, even if the temperature of the environment in which it is used changes greatly, it is possible to obtain stable impact absorption.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional configuration diagram illustrating the present invention.

FIG. 3 is a perspective view showing another embodiment of the present invention.

FIG. 4 is a sectional view showing a pressure adjusting mechanism of the present invention.

[Explanation of symbols]

 1 Hollow Molded Cylindrical Body 2 Center Hole 3 Protrusion 4 Recess 5 Strut 6 Circumferential Wall 7 Annular Projection 8 Outer Surrounding Wall 9 Annular Recess 10 Circular Recess 11 End Face 12 Air Pressure Adjusting Mechanism 13 Through Pore 14 Spring 15 Valve 17 Hollow molded cylinder 18 Outer peripheral wall 19 Annular protrusion

Claims (2)

[Scope of utility model registration request] 1. A protective cushioning material for forming a tubular body by engaging two hollow molded bodies with a column interposed therebetween, wherein the molded body has a diameter smaller than the diameter of the column on the peripheral wall in contact with the column. A cushioning material for protection, characterized in that a plurality of annular projections of different diameters and annular recesses of diameters larger than the diameter of the support columns are provided alternately. 2. The protective cushioning material according to claim 1,
An air pressure adjusting mechanism is provided on an end surface of the molded body, and the air pressure adjusting mechanism is provided so as to be disposed so as to face the through hole penetrating the inside and the outside of the molded body and the through hole with a gap therebetween. A cushioning material for protection, comprising a biased valve, wherein the valve closes the through-hole when the internal pressure rises sharply due to impact on the molded body.