JP2016098948A - Impact absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain impact absorption performance to suppress occurrence of bottomed weighting.SOLUTION: An impact absorber 10 includes a wall body part 11, and cell rows 12, 13 positioned on the inner cylindrical surface of the wall body part 11 and having large cells 12a, 13a projecting from the wall body. The large cells 12a, 13a are laminated in a zigzag arrangement along the height direction of the wall body part 11.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an impact absorber used for transportation equipment such as an automobile.

  In an automobile, in order to protect an occupant in the case of interference between the interior of the vehicle and the occupant due to an impact from the outside of the vehicle body, an impact absorbing panel positioned between the body and the interior panel in the vehicle is provided. Yes. Specifically, it is arranged between the outer panel and the inner panel such as the roof panel, quarter panel or pillar of the body, and there is a risk that the occupant will come into contact with the ceiling, between the door and the windshield in the car. It is selectively provided at a certain location.

  As an example of such a shock absorbing panel, a lattice-like shock absorbing portion 104 formed by a plurality of thin ribs 102 and 103 on a support plate 101, as in the shock absorber 100 shown in FIG. There is known a configuration in which the impact absorbing portion 104 is disposed so as to face the surface of the panel so as to absorb the impact of the panel (for example, Patent Document 1 and FIG. 1).

  As another example, one side of a main body 202 made of a thermoplastic resin integrally formed by blow molding and having a hollow portion 201, such as an impact absorber 200 shown in FIG. A large number of concave ribs 205 and 206 formed by recessing both 203 and the other surface 204 in the opposite direction are provided, and a joint portion 207 is formed by bringing the tips of the concave ribs 205 and 206 into contact with each other. Such a configuration is known (for example, Patent Document 2 and FIG. 1).

JP 2005-153632 A Japanese Patent No. 4181630

  However, the conventional shock absorbing panel has the following problems. That is, in the configuration example shown in FIG. 8A, the lattice-like shock absorbing portions 104 are formed by injection molding and are independent from each other, so that the repulsion weight of the single absorbing portion is large. When the thin ribs 102 and 103 are buckled, the shock absorber 100 may not be able to absorb the shock and collapses at a stretch, which may cause a large bottom load.

  Similarly, in the configuration example illustrated in FIG. 8B, the inside of the hollow portion 201 has a configuration in which the joint portion 207 serving as a main portion that absorbs an impact supports between one surface 203 and the other surface 204. In the collision process, there is a possibility that a large bottomed load is immediately generated as the joint portion 207 is deformed.

  As described above, the conventional shock absorbing panel has a problem in that the shock absorbing performance in the collision process is not maintained and a load with a bottom is generated.

  This invention is made | formed in view of said subject, and it aims at providing the impact-absorbing body which can suppress generation | occurrence | production of weight with a bottom by continuing impact-absorbing performance.

  In order to achieve the above object, a first side surface of the present invention includes a cylindrical portion and a hollow cell portion that is located on an inner cylindrical surface of the cylindrical portion and protrudes from the wall body, and the cell portion Are shock absorbers stacked in a staggered arrangement along the height direction of the cylinder.

  According to another aspect of the present invention, the cylindrical portion has a band-shaped main body portion, and on the surface of the main body portion, a first cell row in which the cell portions are aligned at a predetermined interval; Second cell columns that are adjacent to cell columns and in which the cell portions are arranged at predetermined intervals are alternately provided, and the cell portions of the first cell columns are adjacent to the second cell columns. The gap between the cell portions may be adjacent to each other, and the first cell row and the second cell row may be engaged with each other by winding the main body portion inwardly on the surface. .

  Furthermore, as another aspect of the present invention, the main body portion of the cylindrical portion, the first cell row, and the second cell row are integrally formed by blow molding, and the first cell row and the The inside of the second cell row may communicate with the inside of the cylindrical portion.

  Furthermore, the present invention includes, as another aspect, a plurality of impact absorbers on each side surface of the present invention having the cylindrical portion whose bottom surface shape is approximately triangular, approximately rectangular, or approximately regular hexagonal, and each of the impact absorbers includes The shock absorbing panel may be arranged such that the sides of the bottom surface of the cylindrical portion are adjacent to each other.

  The present invention as described above produces an effect that it is possible to maintain the shock absorbing performance and suppress the occurrence of bottomed weight.

The perspective view which shows the structure of the shock absorption panel which consists of a shock absorber which concerns on embodiment of this invention. The top view which shows the structure of the shock absorber which concerns on embodiment of this invention The perspective view for demonstrating the structure of the shock absorber which concerns on embodiment of this invention. The front view for demonstrating the structure of the shock absorber which concerns on embodiment of this invention. The figure for demonstrating the manufacturing method of the shock absorber which concerns on embodiment of this invention Sectional drawing which shows the structure of the shock absorber which concerns on embodiment of this invention The top view which shows the other structural example of the shock absorber which concerns on embodiment of this invention. (A) Perspective view showing the configuration of a conventional shock absorber (b) Perspective view showing the configuration of a conventional shock absorber

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

  FIG. 1 is a perspective view schematically showing a configuration of an impact absorbing panel according to an embodiment of the present invention.

  As shown in FIG. 1, the shock absorbing panel 1 is a single plate formed by arranging and closely adhering shock absorbers 10 made of a synthetic resin such as a polypropylene resin or a polyolefin resin in the plane direction. It has the shape of The shock absorber 10 has a prismatic saddle shape with a substantially regular hexagonal bottom surface 10a, shares the sides 10a1 of the bottom surface 10a, and is arranged without gaps so that the side surfaces 10b are in close contact with each other. Completed as a panel.

  Next, a detailed configuration of the shock absorber 10 will be described with reference to FIG. However, FIG. 2 is a plan view showing the configuration of the shock absorber 10 constituting the shock absorbing panel 1.

  As shown in FIG. 2, the shock absorber 10 includes a wall body portion 11 corresponding to a prismatic side surface portion and cell rows 12 and 13 provided on the inner surface 11x of the wall body portion 11 as main parts. The The wall portion 11 is a belt-shaped portion that is an outer shape rectangle and has a long side extending greatly as compared with a short side, and is equiangular corresponding to each side 10a1 of the bottom surface 10a of the shock absorber 10. By bending, a cylindrical wall body portion whose end face shape is a substantially regular hexagon is formed. Note that the end portions 11a and 11b of the wall body portion 11 are coupled by a known technical means such as adhesion, welding, or fitting.

  Here, in order to further explain the configuration of the shock absorber 10, an intermediate molded body 10x created in an intermediate stage of the manufacturing process of the shock absorber 10 with reference to the perspective view of FIG. 3 and the front view of FIG. Will be described. The intermediate molded body 10x has a configuration in which the end portions 11a and 11b of the wall body portion 11 are separated from each other in the shock absorber 10 and the wall body portion 11 is developed into a flat plate shape.

  In the intermediate molded body 10x, the cell rows 12 and 13 are on the inner surface 11x of the wall body portion 11 and extend along the short side direction of the wall body portion 11, and as described later, the wall body portion 11 And is integrally molded.

  Next, the cell row 12 includes a large cell portion 12a that protrudes from the inner surface 11x of the wall body portion 11 and has a pentagonal prism shape whose main surface shape is similar to a home base, and a small cell portion that is shorter than the large cell portion 12a. The large cell portions 12 a and the small cell portions 12 b are alternately arranged adjacently along the short side direction of the wall body portion 11.

  In particular, as shown in FIG. 4, the large cell portion 12a and the small cell portion 12b have the same apex angle, width, and thickness, and differ only in height. Here, the width means the dimension along the long side direction of the wall body part 11, the thickness means the dimension along the short side direction of the wall body part 11, and the height means the dimension of the wall body part 11. The dimension along the direction orthogonal to the inner surface 11x is meant.

  The cell row 13 also includes a plurality of small cell portions 13b having the same shape and dimensions as the large cell portions 12a and the same shape and dimensions as the large cell portions 12a and small cell portions 12b. 13a and the small cell part 13b are formed by aligning along the short side direction of the wall part 11 by turns. However, in the adjacent cell row 12 and cell row 13, the large cell portion 12a and the small cell portion 13b are adjacent along the long side direction of the wall portion 11, and the large cell portion 13a and the small cell portion 12b are Adjacent.

  Thereby, on the inner surface 11x of the wall portion 11, the large cell portions 12a and 13a having the same shape and the same dimensions are staggered, and similarly, the small cell portions 12b and 13b having the same shape and the same dimensions are staggered. Yes. In addition, on the outer surface 11 y of the wall body portion 11, there is provided a substantially rectangular missing portion 14 corresponding to each planar shape of the cell rows 12 and 13. However, the omission portion 14 may be omitted.

  As shown in FIG. 5, the intermediate molded body 10x as described above is created by inserting the parison 15 into a blow mold composed of molds 16a and 16b and blow-molding the wall body 11 and the cell rows 12. And 13 are integrally formed.

  In the mold 16a, concave portions 18a and 18b corresponding to the large cell portion 12a and small cell portion 12b, and concave portions 17a and 17b respectively corresponding to the large cell portion 13a and small cell portion 13b are alternately arranged. Provided. Further, the mold 16b is provided with a concave portion 19 corresponding to the large cell portions 12a and 13a formed on the outer surface 11y of the wall body portion 11 and the removal portions 14 of the small cell portions 12b and 13b. Furthermore, the inner surface 11x and the outer surface 11y of the wall portion 11 are formed by pressing the surface of the parison 15 between the molds 16a and 16b in a flat plate shape.

  The intermediate molded body 10x is formed by blow molding to be formed as a hollow bag body in which the inside of the wall body portion 11 and the cell rows 12 and 13 communicate with each other, and at the end portions 11a and 11b of the wall body portion 11 Airtightness is maintained by sealing.

  The impact absorber 10 is formed by bending the boundary between the cell row 12 and the cell row 13 so that the wall body portion 11 is wound around the winding axis O in the drawing in the intermediate molded body 10x as described above. The wall portion of the hexagonal column shown in FIG. At this time, in the cell rows 12 and 13, as shown in FIG. 3, the large cell portion 13a fits into the gap 12x formed by the pair of large cell portions 12a sandwiching the small cell portion 12b therebetween. The large cell portion 12a is fitted into the gap 13x formed by the pair of large cell portions 13a with the small cell portion 13b interposed therebetween.

  Accordingly, as shown in FIG. 2, the large cell portion 12a and the large cell portion are formed in the space surrounded by the inner cylindrical surface of the shock absorber 10, that is, the inner surface 11x bent into the wall surface of the hexagonal column of the wall portion 11. 13a overlap with each other so as to share a region R having the same area indicated by the hatched portion in the drawing, and are stacked along the winding axis O. Moreover, the small cell part 12b and the small cell part 13b are laminated | stacked along the direction of the winding axis | shaft O, respectively in the state which adjoined across the apex angle of the inner surface 11x.

  In the above configuration, the shock absorber 10 corresponds to the shock absorber of the present invention, the wall portion 11 corresponds to the cylindrical portion of the present invention, and the large cell portions 12a and 13a correspond to the cell portion of the present invention. The cell column 12 corresponds to the first cell column of the present invention, and the cell column 13 corresponds to the second cell column of the present invention.

  In the shock absorber 10 of the present embodiment having such a configuration, the large cell portion 12a and the large cell portion 13a overlap each other on the inner cylinder surface side of the wall body portion 11 having a hexagonal columnar wall shape. And having a laminated structure.

  That is, as shown in the cross-sectional view taken along the line AA of FIG. 2 in FIG. 6, in the shock absorber 10, the large cell portions 12a and 13a and the small cell portions 12b and 12b are disposed between the pair of upper and lower bottom surfaces 10a. A plurality of staggered walls are arranged. Specifically, the wall portions 12a2 and 13a2 in the height direction connecting especially the pair of bottom surfaces 10a are staggered with the wall portions 13a1 and 12a1 in the bottom surface direction of the overlapping large cell portions 13a and 12a interposed therebetween. It becomes.

  In this configuration, a load applied to the bottom surface 10a due to a collision with the vehicle body or the like passes through the surface of the large cell portion 13a or the large cell portion 12a while being transmitted between the wall portions 12a2 or 13a2. The energy of impact is distributed to each cell portion of the cell rows 12 and 13 and is lost so as to lengthen the time required for crushing the entire impact absorber 10. Thereby, it is possible to maintain the shock absorbing performance and suppress the occurrence of bottomed weight.

  Further, in the shock absorber 10, the wall portions of the large cell portions 12a and 13a and the small cell portions 12b and 13b are arranged in a staggered manner, so that the load applied to the shock absorber 10 from any direction can be reduced. The wall portion 12a1 or 13a1 and the adjacent wall portions 12a2 and 13a2 are buffered as a set. Thereby, it is possible to obtain a high impact absorption characteristic averaged with respect to a load applied from an arbitrary direction.

  Furthermore, in the shock absorber 10, the load applied to the bottom surface 10a acts so as to expand the wall body portion 11 around the winding axis O shown in FIGS. In this case, the adjacent large cell portions 13a and large cell portions 12a slide along the surface direction to disperse the load on the wall portions 13a1 and 12a1 in the bottom surface direction, and the energy of impact is lost by friction. Thereby, generation | occurrence | production of a bottomed weight can further be suppressed.

  3 and 4, the large cell portions 12a and 13b are pentagonal columnar plates protruding from the inner surface 11x of the wall portion 11 toward the tip, but the taper gradually reduces the thickness from the inner surface 11x side. It is good also as a mode of shape. In this case, it becomes easy to slide the large cell portions against the load, which is preferable.

  Further, in the shock absorber 10, the wall portion 11 forming the wall-like surface of the hexagonal column has a wall portion structure formed by the large cell portions 12a and 13a between the portion including the outer surface 11y and the inner space 11z. It is arrange | positioned in the state which does not pinch | interpose a partition. As a result, the time required for the entire shock absorber 10 to be crushed becomes longer, the shock absorbing performance can be maintained, and the occurrence of bottom load can be suppressed.

  As described above, according to the shock absorber 10 of each embodiment of the present invention, the large cell portion 12a and the large cell portion 13a are formed on the inner cylinder surface side of the wall body portion 11 having a hexagonal columnar wall shape. , And the laminated structure, the shock absorbing performance can be maintained and the occurrence of bottom load can be suppressed.

  However, the present invention is not limited to the above embodiment. In the above description, the shock absorber 10 is made on the basis of the hollow intermediate molded body 10x in which the wall 11 and the cell rows 12 and 13 are integrally formed by blow molding. 11 or any large cell or small cell portion of each cell row may be provided with a small hole communicating with the internal space 11z. Thereby, when the shock absorber 10 receives a load, the small hole functions as an orifice, and a damping load is generated in the shock absorber 10 to absorb the energy of the shock. As a result, it is possible to further suppress the occurrence of bottomed weight.

  Furthermore, in the above description, the shock absorber 10 is formed from one intermediate molded body 10x, but a plurality of shock absorbers may be formed from the integrally molded intermediate molded body. . As an example, the shock absorber 20 shown in FIG. 7 has cell arrays 12 and 13 corresponding to the number of the three shock absorbers 10 formed on the wall portion 21, and the shock absorber around the winding axis O. The sub-absorbers 20a to 20c corresponding to 10 are arranged so as to share the apex angle. The end portions 21 a and 21 b of the wall body portion 21 are coupled in the vicinity of the winding axis O of the wall body portion 21.

  Furthermore, in the above description, the shock absorber 10 shares the sides 10a1 of the bottom surface 10a, and is arranged without a gap so that the side surfaces 10b are in close contact with each other, thereby providing a single plate-like shock absorbing panel 1. However, the method of combining the shock absorbers may be arbitrary. As an example, the bottom surfaces 10a may be arranged in opposite directions. In this case, it is possible to reinforce this by incorporating it in a pipe or the like.

  Further, in the above description, the shape of the shock absorber 10 is assumed to be a substantially hexagonal columnar shape with the bottom surface 10a having a prismatic bowl shape having a substantially regular hexagonal shape, but overlaps with the inner cylindrical surface of the wall body part 11. The bottom surface shape may be arbitrary, such as a circle, a triangle, a rectangle, and other polygons, as long as the cell portion can be arranged. However, in particular, the shape of the bottom surface is substantially a regular hexagon as in the above-described embodiment, and further, a substantially regular triangle or a substantially square is formed by arranging shock absorbers of the same shape with no gap along the surface direction. Is more preferable.

  Furthermore, in the above description, the cell rows 12 and 13 are composed of the large cell portions 12a and 13a and the small cell portions 12b and 13b, respectively. However, as the cell portion of the present invention, at least the large cell portions 12a and 12a It is only necessary to include 13b, and the number and shape of the large cell portions 12a and 13b are not limited by other configurations of the cell rows 12 and 13.

  Further, in the above description, the shock absorber 10 is made based on the hollow intermediate molded body 10x in which the wall body portion 11 and the cell rows 12 and 13 are integrally formed by blow molding. It may be created by molding bonding. The wall part 11 and the cell rows 12 and 13 may each independently have a structure having separated hollow parts.

  Furthermore, in the above description, the present invention has been described as being implemented in an automobile. However, the present invention is not limited to automobiles, trains, ships, etc., as long as it is intended for places that require shock absorption. It may be implemented in any other transport equipment.

  As described above, the present invention includes a cylindrical portion and a hollow cell portion that is located on the inner cylindrical surface of the cylindrical portion and protrudes from the wall body, and the cell portion is in the height direction of the cylindrical portion. As long as they are stacked in a staggered arrangement along the line, they are not limited by other specific purposes, applications, and configurations.

  Therefore, the present invention may be implemented by adding various modifications to the above embodiment, including those described above, as long as they do not depart from the spirit of the present invention.

  The present invention as described above has an effect that it is possible to maintain the shock absorbing performance and suppress the occurrence of bottom load, and is useful for application to the interior of an automobile, for example.

DESCRIPTION OF SYMBOLS 1 Shock absorption panel 10, 20 Shock absorber 10a Bottom surface 10b Side surface 10x Intermediate molded body 11, 21 Wall part 11a, 11b End part 11x Inner surface 11y Outer surface 11z Internal space 12, 13 Cell row 12a, 13a Large cell part 12b, 13b Small cell part 12a2, 13a1 Wall part 14 Outgoing part 15 Parison 16a, 16b Mold 17a, 18a, 19 Recessed part 20a-20c Sub absorber

Claims (1)

A tube part;
A hollow cell part located on the inner cylinder surface of the cylinder part and projecting from the wall,
The cell part is laminated in a staggered arrangement along the height direction of the cylindrical part,
Shock absorber.

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