JP2004149074A - Shock absorbing body for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shock absorbing body for a vehicle having far better shock absorbing property from an interior or an exterior. <P>SOLUTION: Recessed ribs 6, 7 are formed by recessing an abutting surface 4 and a supporting surface 5 of the mainbody 2 having a hollow part, to be opposed with each other toward the other side respectively. The tip parts of the recessed ribs 6, 7 have joined parts 8 abutted to the inner surface of the other side. The abutting surface 4 has a connection rib 9 integrally connecting between a plurality of recessed ribs 6. The depth b (mm) of the connection rib 9 is within a range of 3.0 ≤b≤ √(a/0.5), where a is the thickness (mm) of the mainbody. The connection rib 9 is formed with an inclination of 30° to 60° of the angle made with respect to the one side of the abutting surface 4. The ratio formed by the connection rib 9 is within 10 to 50 % among the recessed ribs 6 adjacent to the inclination direction. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a vehicle component, for example, a door or a body side panel, in which an occupant receives an external impact such as a collision with an inner wall of the vehicle component or an collision with another vehicle. The present invention relates to a vehicle shock absorber for absorbing.
[0002]
[Prior art]
This type of vehicle shock absorber has a hollow double-walled structure obtained by blow molding thermoplastic resin, has a plurality of concave ribs connecting its front wall and rear wall, and has a plurality of concave ribs. Japanese Patent Application Laid-Open No. 2002-187508 discloses a structure in which connecting ribs for integrally connecting the ribs are formed to improve the shock absorption.
[0003]
[Problems to be solved by the invention]
By the way, if a connecting rib that integrally connects a plurality of concave ribs is formed as in JP-A-2002-187508, the shock absorbing property is certainly improved as compared with the case where the connecting rib is not formed. . However, it has subsequently been found that this arrangement does not yet provide sufficient shock absorption.
[0004]
Therefore, an object of the present invention is to provide a concave rib formed by depressing one or both of an opposing contact surface and a support surface of a main body having a hollow portion toward the other, and a tip of the concave rib. The portion has a joint portion in which the distal end portions of the concave ribs formed on the other inner surface or both are in contact with each other, and has a connecting rib that integrally connects the plurality of concave ribs. When the depth b (mm) is in the range of 3.0 ≦ b ≦ √ (a / 0.5), where a is the thickness (mm) of the main body, and the connecting rib is a contact surface or a support surface. Is formed at an angle of 30 ° to 60 ° with respect to one side, and the proportion of connecting ribs formed in the adjacent concave ribs in the inclination direction is 10% to 50%, so that the inside or outside is formed. Shock for vehicles with even better shock absorption from An absorber is provided.
[0005]
[Means for Solving the Problems]
To achieve the above object, a shock absorber for a vehicle according to claim 1 of the present invention is a shock absorber for a vehicle for absorbing a shock from inside or outside by being provided inside a vehicle constituent member, The shock absorber is made of a thermoplastic resin integrally formed by blow molding and has a main body having a hollow portion, and one or both of the opposing contact surface and support surface of the main body facing the other. A concave rib formed by being depressed and having a joint portion in which the distal end of the concave rib formed from the one or the other inner surface or the distal end of the concave rib formed from both abut against each other. And a connecting rib for integrally connecting the plurality of concave ribs, and a depth b (mm) of the connecting rib is defined such that a is the thickness of the main body (mm), and b is the depth of the rib (mm). 3.0 ≦ b ≦ √ It is characterized in that in the range of a / 0.5).
[0006]
The vehicle shock absorber according to claim 2 of the present invention is a vehicle shock absorber for absorbing a shock from inside or outside by being provided inside a vehicle constituent member, wherein the shock absorber is: A main body made of a thermoplastic resin integrally formed by blow molding and having a hollow portion, and one or both of a contact surface and a support surface of the main body facing each other are depressed toward the other. The concave rib, and the distal end of the concave rib has a joint portion in which the distal end of the concave rib formed on the other inner surface or both are in contact with each other, and the plurality of concave ribs are integrally formed. The connecting rib has an inclined angle of 30 ° to 60 ° with respect to one side of the contact surface or the supporting surface, and the concave rib adjacent to the inclined direction. Baby The connection ribs are formed at a rate of 10% to 50%.
[0007]
A shock absorber for a vehicle according to a third aspect of the present invention is a shock absorber for a vehicle for absorbing shock from inside or outside by being provided inside a vehicle constituent member, wherein the shock absorber is blow molded. A main body having a hollow portion, which is made of a thermoplastic resin and integrally molded by the above, a concave rib formed by depressing both opposing contact surfaces and support surfaces of the main body toward the other, The distal ends of the concave ribs formed from both have joints in contact with each other, and have a connecting rib that integrally connects the plurality of concave ribs, and the connecting rib has a contact surface or a support surface. The connecting ribs are formed in only 25% of the concave ribs adjacent to each other in the inclined direction having an angle of 30 ° to 60 ° with respect to one side, and are formed only on the contact surfaces. is there.
[0008]
A vehicle shock absorber according to claim 4 of the present invention is the vehicle shock absorber according to claim 1 or 3, wherein the connection rib has a depth of 3.0 to 15.0 mm and a width of 2 to 2. It is characterized by being a concave groove of 0.0 to 5.0.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
1 is a perspective view of a shock absorber for a vehicle according to an embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2, and FIG. FIG. 5 is a partially enlarged perspective view showing another example of the connecting rib corresponding to FIG. 4, and FIG. 6 is a cross-sectional view showing a state in which the vehicle shock absorber according to the present invention is installed in a vehicle door panel. FIG. 7, FIG. 7 is a cross-sectional view showing an embodiment in which a vehicle shock absorber according to the present invention is installed in a rear pillar of an automobile, 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 plan view of a vehicle shock absorber according to another embodiment of the present invention.
[0010]
1 to 4, reference numeral 1 denotes a vehicle shock absorber. This shock absorber 1 for a vehicle is made of a thermoplastic resin integrally formed by blow molding and has both a contact surface 4 and a support surface 5 of a body 3 having a hollow portion 2 facing each other facing the other. The ribs 6 and 7 have a large number of concave ribs 6 and 7 formed by being depressed. Further, connecting ribs 9 are integrally connected between the many concave ribs 6. The connecting rib 9 is formed in a range of 3.0 ≦ b ≦ √ (a / 0.5), where “a” is the thickness (mm) of the shock absorber 1 and “b” is the depth (mm) of the connecting rib. I have.
[0011]
As shown in FIG. 2, the connecting rib 9 is formed such that an angle θ formed with respect to one side of the contact surface 4 is 30 ° to 60 °. Of these, the ratio at which the connecting ribs 9 are formed is 10% to 50%. The connecting rib 9 is a concave groove having a depth h of 3.0 to 15.0 mm and a width w of 2.0 to 5.0 mm. In order to achieve the object of the present invention, the connecting rib 9 may have a depth b (mm) in a range of 3.0 ≦ b ≦ √ (a / 0.5) with respect to the thickness a of the main body. It is necessary, and it is particularly preferable that the depth of the groove is 3.0 to 15.0 mm and the width is 2.0 to 5.0 mm.
[0012]
Further, the connecting rib 9 is formed with an angle θ of 30 ° to 60 ° with respect to one side of the contact surface 4 or the supporting surface 5, and the concave rib 6 adjacent in the tilt direction is formed. It is necessary that the ratio at which the connecting ribs 9 are formed is in the range of 10% to 50%, and it is particularly preferable that the ratio is 25%.
[0013]
In the shock absorber shown in FIG. 2, among the 38 concave ribs 6 formed on the contact surface 4 and the support surface 5, the angle θ formed with respect to one side formed on the contact surface 4 is set. The connecting ribs 9 are formed so as to connect the adjacent concave ribs 6 in only one inclination direction, that is, 50% of the adjacent concave ribs 6 adjacent to each other in the inclination direction of 30 ° to 60 °. That is, 14 connection ribs out of 56 connection ribs that can be formed in calculation are formed, and the angle θ formed with respect to one side of the contact surface 4 or the support surface 5 is adjacent to the inclination direction of 30 ° to 60 °. The connecting ribs are formed at a rate of 25% as a whole among the concave ribs 6. In the shock absorber shown in FIG. 9, connection ribs are formed at a ratio of 14.3% based on the same calculation.
[0014]
That is, if the depth h of the connecting rib 9 is less than 3 mm, the strength for keeping the posture of the concave rib 6 constant is insufficient, and the sideways fall occurs. If the depth h of the connecting rib 9 is larger than the square root of twice the thickness a of the main body 3, the concave rib 6 is crushed by the impact at the time of collision and crushed to the final stage. The connecting ribs 9 come into contact with the opposing wall surfaces before, and the desired shock absorbing performance cannot be obtained.
[0015]
The connecting ribs 9 connecting the plurality of concave ribs 10 to each other can be the embodiment shown in FIG. In the embodiment shown in FIG. 5, a portion of the connecting rib 9 forms a so-called inner rib, which is concealed in the hollow portion 2. The inner rib is formed into a plate-like rib by forming a groove-like rib from the contact surface 4 toward the hollow portion 2 at the time of blow molding, and integrating the rib by blow pressure. By using the connecting rib 9 as the inner rib in this manner, the desired impact absorbing performance can be obtained.
[0016]
Although not shown, in the vehicle shock absorber 1 according to the present invention, the concave ribs 6 may be formed on the support surface 5 instead of the contact surface 4 of the main body 3. The connecting rib 9 to be connected is formed on the support surface 5.
[0017]
The thermoplastic resin constituting the vehicle shock absorber 1 according to the present invention includes high-density polyethylene resin, polypropylene resin, polyamide resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polycarbonate resin, acrylonitrile-butadiene-styrene. Resin (ABS resin), acrylonitrile / styrene resin (AS resin), acrylonitrile / acryl rubber / styrene copolymer (AAS resin), polyphenylene ether resin (PPO resin), or a blend thereof.
[0018]
The vehicle shock absorber 1 according to the present invention is installed in a door, a body side panel, a roof panel, a pillar, a bumper, or the like of an automobile or the like. 6 shows an example in which the vehicle shock absorber 1 according to the present invention is provided inside the door trim 11 of the door 10, FIG. 7 shows the rear pillar 12 of the automobile, and FIG. 8 shows the rear bumper 13 therein. In FIG. 7, A indicates the occupant's head.
[0019]
【The invention's effect】
According to the present invention, a concave rib formed by depressing one of the opposing contact surface and the support surface of the main body having a hollow portion toward the other, and the tip end of the concave rib is the other end. It has a connecting portion that abuts on the inner surface, and has a connecting rib that integrally connects the plurality of concave ribs, and a depth b (mm) of the connecting rib is a where a is a thickness of the main body (mm). By setting the range of 3.0 ≦ b ≦ √ (a / 0.5), the connecting rib is formed with an angle of 30 ° to 60 ° with respect to one side of the contact surface or the support surface. By setting the proportion of the connecting ribs formed in the concave ribs adjacent in the inclination direction to 10% to 50%, it is possible to obtain a shock absorber for a vehicle having more excellent shock absorbing properties from inside or outside. You can do it.
[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 a plan view of the same.
FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2;
FIG. 4 is an enlarged perspective view of a part of the above.
5 is a partially enlarged perspective view showing another example of the connecting rib corresponding to FIG. 4;
FIG. 6 is a cross-sectional view showing an embodiment in which the vehicle shock absorber according to the present invention is installed in a door of an automobile.
FIG. 7 is a cross-sectional view showing a mode in which the vehicular shock absorber according to the present invention is installed in a rear pillar of an automobile.
FIG. 8 is a rear view of a rear bumper provided with the vehicle shock absorber according to the present invention.
FIG. 9 is a plan view of a vehicle shock absorber according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shock absorber 2 for vehicle 2 Hollow part 3 Main body 4 Contact surface 5 Support surface 6, 7 Concave rib 8 Joint 9 Connecting rib 10 Door 11 Door trim 12 Rear pier 13 Rear bumper A Head

Claims (4)

In a vehicle shock absorber for absorbing internal or external impact by being provided in a vehicle component,
The shock absorber is made of a thermoplastic resin integrally formed by blow molding and has a main body having a hollow portion, and one or both of the opposing contact surface and support surface of the main body facing the other. A concave rib formed by depression
The distal end of the concave rib formed from the one has a joint portion in which the distal end of the concave rib formed on the other inner surface or the both ends abuts each other, and integrally connects the plurality of concave ribs. Has connecting ribs,
The depth b (mm) of the connecting rib is in the range of 3.0 ≦ b ≦ √ (a / 0.5), where a is the thickness of the main body (mm) and b is the depth of the rib (mm). A shock absorber for a vehicle, characterized in that: In a vehicle shock absorber for absorbing internal or external impact by being provided in a vehicle component,
The shock absorber is made of a thermoplastic resin integrally formed by blow molding and has a main body having a hollow portion, and one or both of the opposing contact surface and support surface of the main body facing the other. A concave rib formed by depression
The tip of the concave rib has a joining portion in which the tip of the concave rib formed on the other inner surface, or both, is in contact with each other, and has a connecting rib for integrally connecting the plurality of concave ribs. And
The connection rib is formed with an angle of 30 ° to 60 ° with respect to one side of the contact surface or the support surface,
A shock absorber for a vehicle, wherein a ratio of connecting ribs formed in concave ribs adjacent in the inclination direction is 10% to 50%. In a vehicle shock absorber for absorbing internal or external impact by being provided in a vehicle component,
The shock absorber is made of a thermoplastic resin integrally formed by blow molding and has a hollow body, and is formed by depressing both the abutting surface and the supporting surface of the body facing each other toward the other. With a concave rib
The tip of the concave rib formed from the both has a joint portion in contact with each other, and has a connecting rib that integrally connects the plurality of concave ribs,
The connecting ribs are formed such that the proportion of the connecting ribs is 25% of the concave ribs adjacent to the contact surface or one side of the supporting surface in the inclined direction of 30 ° to 60 °, and only the contact surface is formed. A shock absorber for a vehicle, wherein the shock absorber is formed. 4. The vehicle shock absorber according to claim 1, wherein the connecting rib is a concave groove having a depth of 3.0 to 15.0 mm and a width of 2.0 to 5.0.

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