JP4271476B2 - Shock absorber for vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, such as collision with shock or other vehicle, crew occurs inside the vehicle so as to collide with the inner wall of the vehicle component by internally provided vehicle component, for example a door or a body side panel it relates a vehicle shock absorber for absorbing an impact applied from the outside.
[0002]
[Prior art]
As a shock absorber for this type of vehicle, a thermoplastic resin is blow-molded to have a hollow portion with a hollow double wall structure, and concave ribs are formed from the front and back walls to join the tip portions of each other. In order to improve the impact absorption, it is described in Japanese Patent No. 3331999.
[0003]
[Problems to be solved by the invention]
This type of vehicle shock absorber is installed in a vehicle component such as a door or a body side panel, but its surface is similar to the vehicle shock absorber as shown in the above-mentioned Japanese Patent No. 33133999. In the case where the concave rib is formed from the wall and the back wall and the tips of each other are joined and integrated, the shock absorption against the stress due to the impact is high, but the stress due to the impact is continuously applied However, it has been pointed out that the concave ribs buckle, the shock absorption is remarkably lowered, and the desired impact effect cannot be obtained.
[0004]
[Problems to be solved by the invention]
Therefore, in order to solve the above problems, the present invention provides a shock absorber made of a thermoplastic resin integrally formed by blow molding and having a hollow portion, and one of the main bodies facing each other. a concave rib pairs which are joined to each other at the tip portion by depressing toward the surface and the other surface to the respective opposite direction, said recessed toward the one surface and the other surface of the respective opposite directions to each other By forming a large number of concave ribs in pairs with the tips close together, the stress is absorbed by the pair of concave ribs with the tips joined to the initial impact, and then added continuously. Can be absorbed by the temporary joining of the paired concave ribs with the tips close to each other, even when the paired concave ribs with the tips joined buckle. Excellent shock absorption It is an object to provide a two-way shock absorber.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a vehicle shock absorber according to claim 1 of the present invention is a vehicle shock absorber provided in a vehicle component, wherein the shock absorber is integrally formed by blow molding. a body having a hollow portion which is made of thermoplastic resin, and a concave rib is formed in a number in the body evenly distributed form, concave ribs, opposing the one surface and the other surface opposed to each other in the main body, respectively A pair of concave ribs that are recessed in the direction and joined to each other's tip, and a pair in which one surface and the other surface are recessed in the opposite direction and the tips are brought close to each other and it is characterized in Monodea Rukoto comprising a concave rib.
[0006]
According to a second aspect of the present invention, there is provided a vehicle impact absorber according to a second aspect of the present invention, wherein the impact absorber is made of a thermoplastic resin integrally formed by blow molding. A main body having a hollow portion and a plurality of concave ribs formed in the main body so as to be evenly distributed. The concave rib is formed on the other surface or one surface of the main body facing the other surface or the other surface. a concave rib is joined to the distal end portion on the other surface or one surface by depressing towards the direction, by depressing toward the direction of the other surface or one surface facing the one surface or the other surface the Monodea Rukoto comprising a tip portion and a second surface or concave rib which is brought close to one side in which characterized.
[0007]
According to a third aspect of the present invention, there is provided a vehicular shock absorber according to the first or second aspect, wherein 50 to 80% of the total number of concave ribs formed on the main body of the shock absorber is joined to the tip. And 50 to 20% of the concave ribs have the tip portions close to each other.
[0008]
According to a fourth aspect of the present invention, the shock absorber for a vehicle according to the first aspect is characterized in that, in the configuration of the first aspect, the interval between the front ends of the concave ribs close to each other is 5 to 18 mm on average. It is what.
[0009]
According to a fifth aspect of the present invention, there is provided a vehicular shock absorber according to the first aspect of the present invention, wherein the tip end portions of the pair of concave ribs having the tip portions close to each other are formed in a concave shape or a convex shape. It is a feature.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a partially cutaway perspective view of a vehicle shock absorber according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along line AA in FIG. 1, and FIG. 4 is a detailed cross-sectional view showing a part of FIG. 2, FIG. 5 is a perspective view showing a vehicle impact absorber according to another embodiment of the present invention in a partially broken view, and FIG. FIG. 7 is an enlarged cross-sectional view taken along line BB in FIG. 5, FIG. 7 is a cross-sectional view showing a mode in which the vehicle shock absorber according to the present invention is installed in a vehicle door panel, and FIG. 8 is a vehicle shock absorber according to the present invention. FIG. 9 is a cross-sectional view showing a state in which the vehicle shock absorber according to the present invention is installed in the rear pillar of the automobile, and FIG. 10 is a blow view of the vehicle shock absorber according to the present invention. FIG. 11 is a partial cross-sectional view showing a state in which the mold is closed.
[0011]
1 and 2, reference numeral 1 denotes a vehicle shock absorber. The vehicle shock absorber for 1 each opposing direction of both one surface 4 and the other surface 5 facing each other of the main body 3 having a hollow portion 2 which is made of thermoplastic resin are integrally molded by blow molding Recessed ribs 6 and 7 that are joined together at the joint 8 by joining the tip parts to each other and the one face 4 and the other face 5 are recessed in the opposing direction , respectively. A large number of concave ribs 9 and 10 are provided in an evenly distributed manner.
[0012]
As shown in FIG. 5, the shock absorber 1 for a vehicle according to the present invention has a concave rib 6 that is recessed with one surface 4 of the main body 3 facing toward the other surface 5, and the tip end portion of the other. A concave rib 6 joined to the surface 5 with a joint portion 8 and a concave rib 9 in which one surface 4 is recessed toward the other surface 5 and the tip is brought close to the other surface 5, respectively. It can be set as the structure which has many uniformly distributed form. Incidentally, the concave rib 6 and 9 may be formed from the other surface 5 to one surface four directions, but not shown for this configuration.
[0013]
50 to 80% of the concave ribs 6 and 7 having the tip portions joined to the total number of the concave ribs 6 and 7 and the concave ribs 9 and 10 formed in the main body 2 of the vehicle shock absorber 1 And it is preferable that the concave-shaped ribs 9 and 10 which made the front-end | tip part adjoined are 50 to 20%. Moreover, it is suitable that the mutually opposing space | interval of the front-end | tip part of the concave ribs 9 and 10 which made the front-end | tip part adjoined is 5-18 mm on average.
[0014]
In the vehicle shock absorber 1 shown in FIGS. 1 and 2, one end of the concave ribs 9 and 10 with their front ends close to each other is a concave surface portion 11 and the other is a convex surface portion 12, respectively. Is formed. By configuring the tip portion in this way, the concave ribs 9 and 10 are deformed by impact and the tip portions are joined to each other so that no mutual displacement occurs, and the concave ribs 9 and 10 are used. Impact absorption is further improved. The concave and convex surfaces of the concave ribs 9 and 10 may be reversed.
[0015]
The vehicle impact absorber 1 according to the present invention is blow-molded in the manner shown in FIGS. 10 and 11. 10 and 11, reference numerals 13 and 14 denote a pair of split molds. The split molds 13 and 14 have protrusions 15 and 16 for forming concave ribs 6 and 7, respectively. 17 is a parison and 18 is an extrusion head.
[0016]
The vehicle impact absorber 1 according to the present invention is installed in a vehicle component such as a door of a car, a body side panel, a roof panel, a pillar, a bumper or the like. FIG. 7 shows an example in which the vehicle shock absorber 1 according to the present invention is installed in the door trim 20 of the door 19, FIG. 8 in the rear bumper 21, and FIG. 9 in the rear pillar 22 of the automobile. In FIG. 9, A indicates the head of the passenger.
[0017]
The impact absorber 1 for a vehicle according to the present invention has a flexural modulus at 23 ° C. of 5000 to 25000 Kg / of polyolefin such as polyethylene and polypropylene, styrene resin such as polystyrene and ABS resin, polyester resin such as polyethylene terephthalate, and polyamide. It is composed of a resin having a high mechanical height such as rigidity of cm ² (value measured according to JIS-K7203).
[0018]
According to the vehicle shock absorber 1 of the present invention, the paired concave ribs 6 and 7 with the tip portions joined and the paired concave ribs 9 and 10 with the tip portions close to each other are evenly distributed. By forming a large number, it is possible to exhibit excellent shock absorption even when the paired concave ribs joined at the tip end portions are buckled. In particular, the rear pillar 20 of the automobile shown in FIG. Suitable for use.
[0019]
【The invention's effect】
According to the present invention, the shock absorber body and, respectively opposite directions opposing one surface and the other surface of the body having a hollow portion a thermoplastic resin which is integrally molded by blow molding A pair of concave ribs that are recessed toward each other and joined to each other, and a pair in which the one surface and the other surface are recessed in the opposite direction to bring the distal ends close to each other By forming a large number of concave ribs and evenly distributed , stress is absorbed by the pair of concave ribs joined to the tip for the first impact, and the tip for the impact applied continuously. For a vehicle having excellent shock absorption even when a pair of concave ribs that are adjacent to each other can be absorbed by temporary bonding with each other and the pair of concave ribs to which the tip ends are buckled. Can get a shock absorber That.
[Brief description of the drawings]
FIG. 1 is a perspective view of a vehicle shock absorber according to an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG.
FIG. 3 is a detailed sectional view showing a part of FIG. 2;
FIG. 4 is a detailed sectional view showing a part of FIG. 2;
FIG. 5 is a partially cutaway perspective view showing a vehicle shock absorber according to another embodiment of the present invention.
6 is an enlarged cross-sectional view taken along the line BB of FIG.
FIG. 7 is a cross-sectional view showing a mode in which a vehicle shock absorber according to the present invention is installed in a door panel of a vehicle.
FIG. 8 is a rear view of a rear bumper in which a vehicle shock absorber according to the present invention is installed.
FIG. 9 is a cross-sectional view showing a mode in which a vehicle shock absorber according to the present invention is installed in a rear pillar of an automobile.
FIG. 10 is a partial cross-sectional view showing a blow molding aspect of the vehicle shock absorber according to the present invention.
FIG. 11 is a partial cross-sectional view showing a state in which the mold is closed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vehicle shock absorber 2 Hollow part 3 Main body 4 One surface 5 The other surface 6,7 Concave rib 8 Joint part 9,10 Concave rib 11 Concave part 12 Convex part 13 , 14 Divided mold 15,16 Protrusion 17 Parison 18 Extrusion head 19 Door 20 Door trim 21 Rear bumper 22 Rear pillar A Head

Claims (5)

In a shock absorber for a vehicle installed in a vehicle component,
The shock absorber includes a main body made of a thermoplastic resin integrally formed by blow molding and having a hollow portion, and a plurality of concave ribs formed in the main body in a uniform and distributed manner.
Concave ribs and the concave rib pairs which are joined to each other at the tip portion by depressing with the one surface and the other surface opposite to each other of the body towards each to the opposite direction, the one surface and the other surface the vehicle shock absorber, characterized in Monodea Rukoto comprising a concave rib respectively recessed toward the opposite direction pairs that were close to each other of the tip. In a shock absorber for a vehicle installed in a vehicle component,
The shock absorber includes a main body made of a thermoplastic resin integrally formed by blow molding and having a hollow portion, and a plurality of concave ribs formed in the main body in a uniform and distributed manner.
Concave ribs and concave ribs are joined one other facing surfaces or other surface of the surface or recessed toward the direction of the one face end portion of the body on the other side or one side, the Monodea Rukoto consisting of one surface or concave ribs facing the other face by depressing toward the direction of the other surface or one surface is brought close to the distal end portion on the other surface or one surface A characteristic vehicle shock absorber.   50 to 80% of the total number of concave ribs formed on the main body of the shock absorber is a concave rib with the tip part joined, and 50 to 20% is a concave rib with the tip part close to each other. The shock absorber for a vehicle according to claim 1 or 2, characterized in that   The shock absorber for a vehicle according to claim 1, wherein an interval between the front ends of the concave ribs close to each other is 5 to 18 mm on average.   The shock absorber for a vehicle according to claim 1, wherein the front ends of the paired concave ribs having the front ends close to each other are formed in a concave shape or a convex shape.

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