JP6024958B2 - Shock absorbing bag body and protective fence using the same - Google Patents

Description

  The present invention relates to an impact-absorbing bag body that absorbs kinetic energy of a collision object that has collided, and a protective fence using the same.

  Conventionally, for example, sandbags filled with earth and sand are placed side by side in a cloth bag to function as a protective fence in places where falling objects (collision objects) such as falling rocks, landslides, and avalanches are present. .

  Since such a sandbag is only filled with earth and sand in the cloth bag, the cushioning effect is not sufficient and there is a demand to increase it.

  Also, instead of such earth and sand, there is also a protective structure that can obtain a uniform buffering effect by using old tire grinding chips or polystyrene foam grinding chips sealed in a cloth bag such as a cloth bag or rubber bag. It has been proposed (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 9-221720 (paragraph 0016 and FIG. 4)

  In the thing of the said patent document 1, since the grinding | pulverization chip | tip of an old tire and the grinding | pulverization foam of polystyrene are used in a cloth bag instead of earth and sand, it is necessary to manufacture the grinding | pulverization chip | tip of an old tire and the grinding | pulverization foam of polystyrene.

  The inventor conceived that the cushioning effect can be enhanced by devising the structure of a conventional sandbag filled with granular materials such as earth and sand in a cloth bag without using such crushed chips, and the present invention. It was made.

  Therefore, the present invention provides an impact absorbing bag body that can increase the buffering effect and can absorb the kinetic energy of a collision object including falling objects such as falling rocks, landslides, and avalanches, and a protective fence using the same. Objective.

The invention according to claim 1 is an impact-absorbing bag body in which a cloth bag is filled with granular materials such as sand and absorbs the kinetic energy of a collision target such as rock fall, and a part of the outer surface of the cloth bag is overlapped. The suture part is sewn with a suture-like material so as to maintain the contact state, and the suture-like material is inferior in strength to the woven yarn woven with the cloth bag. Features. Here, the suture material is a material capable of sewing a cloth bag, and a thread material such as a thread or string is used.

  In this way, when a collision object (for example, a falling object such as a falling rock) collides, the collision object moves the granular object in the cloth bag by the kinetic energy of the collision object, and the cloth bag is sewn. There is no, try to return to the original shape. At that time, the suture material is cut, the kinetic energy is consumed for the cutting, and the kinetic energy of the collision object is absorbed. Thereby, the collision target object stops near the installation location of the shock absorbing bag body. That is, it stays in the vicinity of the installation place without moving to the periphery due to the collision.

Further , since the suture-like material is broken before the cloth bag is broken, the kinetic energy of the collision object can be absorbed without breaking the cloth bag.

According to a second aspect of the present invention, it is desirable that the stitched portion is formed on one side of the cloth bag, and the other side of the cloth bag is a portion that causes the collision object to collide.

  In this way, since the collision object is caused to collide with a portion where there is no stitching, the movement of the granular material inside the cloth bag can be increased, and the impact absorbing effect of cutting the suture thread material by deformation of the cloth bag can be enhanced.

Invention of Claim 3 is comprised by arrange | positioning the impact-absorbing bag body of Claim 1 or 2 by one or more, and is a protective fence which absorbs the kinetic energy of collision objects, such as falling rocks, Each impact-absorbing bag is characterized in that the outer surface excluding the stitched portion is opposed in the direction in which the collision object is expected to move.

  In this way, the whole of the cloth bag is deformed as the granular object in the cloth bag is largely moved by the collision of the collision object, and the suture-like material is cut by the deformation, and the kinetic energy of the collision object is cut by the cutting. Absorbed. A protective function for receiving the collision object is exhibited.

  Since the present invention absorbs the kinetic energy by cutting the suture-like material when a collision target object (for example, a falling object such as a falling rock) collides as described above, the collision target object is a shock-absorbing bag. It can be stopped nearby.

It is explanatory drawing which shows one Embodiment of the shock absorption bag body of this invention. (A) and (b) are explanatory drawings of the principle of shock absorption, respectively. It is explanatory drawing which shows one Embodiment of the protection fence using the said shock absorption bag body. (A) (b) is explanatory drawing of other embodiment, respectively.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an explanatory view showing an embodiment of the shock absorbing bag body of the present invention.

  As shown in FIG. 1, a shock-absorbing bag body 1 is made of a long and cylindrical cloth bag 2 (for example, natural fibers such as hemp or a synthetic material such as polyethylene). (Made of fiber).

  The cloth bag 2 has its outer surface 2a partially overlapped and brought into contact with each other, and the periphery of the contact portion is sewn so as to maintain the contact state between the outer surfaces 2a with the suture thread 3 as a suture-like material. Yes. In the embodiment shown in FIG. 1, it has two stitching portions 1a and 1b. The shock absorbing bag 1 is formed by filling a predetermined amount of the granular material in the cloth bag 2 after the above-described stitching is completed. Of course, the filling port of the granular material is securely closed using a string or the like as in the known sandbag. As a result, the granular material to be filled comes into contact with the inner side surface opposite to the outer side surface 2a in contact with the stitched portions 1a and 1b.

  The suture thread 3 is inferior in strength to the weaving thread that weaves the cloth bag 2, and is configured to be cut before the cloth bag 2 is torn. By cutting the suture thread 3, the kinetic energy of the collision object when the collision object such as falling rock collides with the shock absorbing bag 1 is absorbed. Moreover, since the cloth bag 2 is not torn, the filled granular material is not scattered around.

  According to the shock-absorbing bag body 1, for example, a fallen object such as a falling rock collides with the cloth bag 2, and when a load is applied in the direction A as shown in FIG. In this case, a part of the kinetic energy of the falling object is absorbed, and a buffering effect is exhibited. When the kinetic energy of the fallen object is large, the granular material in the cloth bag 2 is moved greatly to return the entire shape of the cloth bag 2 to the original shape before sewing. That is, when the granular material is moved, the outer surfaces 1a and 1a which are in contact with each other by sewing are attempted to move away from each other. In accordance with the degree of force to be moved, the suture thread 3 is gradually cut from the outside toward the center, and changes to the state shown in FIG. Due to the cutting of the suture thread 3, the energy absorption due to the movement of the particulate matter and the energy absorption due to the cutting of the suture thread 3 are combined, and a further buffer effect is exhibited. As a result, the fallen object absorbs the kinetic energy, stops near the shock absorbing bag body 1 and stays there without moving.

  Thus, the kinetic energy of the fallen object is absorbed not only by the movement of the granular object but also by the cutting of the suture thread 3 that stitches the cloth bag 2, and the kinetic energy of the fallen object is greatly reduced. , Movement to the periphery can be suppressed.

  On the other hand, when the kinetic energy is small, even if the fallen object tries to move the granular material in the cloth bag 2, only a small movement of the internal granular material occurs, and the suture 3 is not cut. The fallen object stops at a location near the shock absorbing bag body 1.

  For example, as shown in FIG. 3, a plurality of shock absorbing bags 1 can be installed side by side under a cliff 11 along the road, and can be used as a protective fence for falling rocks, avalanches, collapsed earth and sand. The shock absorbing bag body 1 is supported by a support fence 12 so as not to move to the road side. Further, the entire plurality of installed shock absorbing bag bodies 1 may be covered with a net or the like so as to be integrated with the support fence 12. Needless to say, the protection fence may be configured with a single shock absorber 1 instead of using a plurality of shock absorbers 1.

  In this case, the shock-absorbing bag body 1 has the outer surface 2a excluding the stitched portions 1a and 1b, that is, the outer surface not provided with the stitched portions, facing each other in the direction in which the collision object is expected to move. Installed. Thus, when the collision object collides, the granular material moves greatly in the cloth bag 2 so as to open the stitched portions 1a and 1b, and the suture 3 is cut. Therefore, even when the kinetic energy of the collision target is large, the kinetic energy of the collision target can be absorbed by cutting the suture thread 3.

  The present invention is not limited to the above-described embodiment, and can be implemented with the following modifications.

  (i) The granular material is not limited to earth and sand, but can be used as long as it has high compressive strength and does not easily compress and collapse, such as stone (natural stone, crushed stone, etc.), wood chip, wood chip, Moreover, it is also possible to select and mix two or more of these according to the installation location or installation purpose.

  (ii) The number of stitched portions of the shock absorbing bag body is not particularly limited. For example, as shown in FIG. 4A, the same effect can be obtained as a shock absorbing bag body 1A having one stitched portion 1a. Is obtained. Further, the size of the stitched portion can be appropriately changed depending on the installation location, the installation purpose, the size of the cloth bag, and the like.

  (iii) Further, for example, as shown in FIG. 4B, it is also possible to form the stitched portions 1a and 1b of the shock absorbing bag body 1B so as to be offset toward one side of the shock absorbing bag body 1B. If it does in this way, the outer side surface of the other side of the cloth bag 2 can be installed facing the direction in which the said collision target object is expected to move, and the absorption effect of a kinetic energy can be improved. .

  (iv) The location of the shock-absorbing bag body is not limited to the bottom of a cliff, but the kinetic energy of a falling object or an object to be collided is alleviated to prevent the falling object or object to be collided from moving to the surroundings. The same effect can be obtained by providing it where it is necessary. In this case, two or more of the above-described shock absorbing bag bodies 1, 1A, 1B can be selected and used together, and a shock absorbing bag body having a stitched portion different from those can be further selected and used together. It is also possible.

1, 1A, 1B Shock-absorbing bag 1a, 1b Sewn portion 2 Cloth bag 2a Outer side surface 3 Suture (suture-like material)

Claims (3)

An impact-absorbing bag body that is filled with granular materials such as sand in a cloth bag and absorbs the kinetic energy of a collision object such as rock fall,
A portion of the outer surface of the cloth bag is brought into contact with each other, and a stitched portion that is sewn with a suture-like material so as to maintain the contact state is provided,
The impact-absorbing bag body , wherein the suture-like material is inferior in strength to a woven yarn that weaves the cloth bag. The suture portion is formed at one side of the sack, the other side of the cloth bag, the shock absorbing bag of claim 1 wherein the portion impinging the object struck. A protective fence configured to arrange one or a plurality of the shock absorbing bag bodies according to claim 1 or 2 to absorb the kinetic energy of a collision target such as a falling rock,
A protective fence, wherein each of the shock-absorbing bag bodies is opposed to an outer surface excluding the stitched portion in a direction in which the collision object is expected to move.

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