JP4052243B2 - Bumper structure for vehicles - Google Patents

Description

  The present invention relates to a vehicular bumper structure, and more particularly to a vehicular bumper structure that detects a collision object in a vehicle such as an automobile.

Conventionally, in a vehicle bumper structure for detecting a collision object in a vehicle such as an automobile, a groove extending in the longitudinal direction is formed on the front surface of the bumper reinforcement, and a collision detection sensor is housed in the groove and a shock absorbing material. There is known a configuration in which a pair of upper and lower grooves are formed on the rear surface, and a pushing portion for a collision detection sensor is formed (for example, see Patent Document 1).
JP 2000-225907 A

  However, in Patent Document 1, a space is formed between the front wall portion of the bumper reinforcement where the collision detection sensor is disposed and the rear wall portion of the bumper reinforcement. As a result, the rigidity of the mounting position of the collision detection sensor is low. For this reason, the collision detection sensor easily moves to the rear side of the vehicle body when a load is applied, so that stable detection cannot be performed, and the collision detection performance is deteriorated.

  An object of the present invention is to provide a vehicle bumper structure that can improve the collision detection performance in consideration of the above facts.

Vehicle bumper structure of the present invention according to claim 1, extends along the vehicle width direction, is a side cross-sectional shape having a closed cross-section portion Rutotomoni over the vehicle width direction in the vehicle longitudinal direction in the closed-section portion Bumper reinforcement with reinforcements along the line ,
A collision detection sensor disposed on the vehicle outer side of the bumper reinforcement on the vehicle body outer side along the reinforcing portion at a position on the outer side of the vehicle body of the bumper reinforcement on the outer side of the vehicle body,
The bumper reinforcement and a shock absorber disposed outside the vehicle body of the collision sensor;
Have
The shock absorber is formed with a plurality of convex portions at intervals in the vertical direction toward the inside of the vehicle body, the plurality of convex portions abut on the vehicle body outside the bumper reinforcement, and the bumper reinforcement One of the portions between the plurality of convex portions is formed below the center in the vertical direction of the ment, and this portion is located outside the vehicle body from the portion between the plurality of convex portions formed at the position where the collision detection sensor is disposed. It is characterized by extending .

Therefore, when the collision body collides with the bumper, a load from the outside is transmitted to the collision detection sensor. At this time, inside the vehicle body outer surface of the bumper reinforcement where the collision detection sensor is arranged, a reinforcing portion is arranged along the vehicle longitudinal direction in the vehicle cross-sectional direction within the closed cross section of the bumper reinforcement. The collision detection sensor is disposed in the vehicle width direction along the reinforcing portion at a portion on the outer side of the reinforcing portion on the upper side in the vertical direction of the outer side surface of the bumper reinforcement. As a result, the rigidity of the attachment position of the collision detection sensor is high. For this reason, since the collision detection sensor is difficult to move to the inside of the vehicle body when the load is applied and stable load detection can be performed, the collision detection performance can be improved. In addition, the collision detection sensor is provided above the center of the bumper reinforcement in the vertical direction, and the shock absorber disposed outside the vehicle body of the bumper reinforcement and the collision sensor is spaced apart in the vertical direction toward the inside of the vehicle body. A plurality of protrusions are formed by opening, the plurality of protrusions abut on the outside of the vehicle body in the bumper reinforcement, and one of the portions between the plurality of protrusions is formed below the center in the vertical direction of the bumper reinforcement. This part extends to the outside of the vehicle body from the part between the plurality of protrusions formed at the position where the collision detection sensor is disposed. For this reason, when the collision object contacts the upper side of the bumper reinforcement in the bumper above the vertical center, the collision object is detected compared to the case where the collision object contacts the lower side of the bumper reinforcement in the vertical direction. Performance is improved. As a result, it is possible to improve the collision detection performance when the collision body contacts the upper side of the bumper.

Vehicle bumper structure of the present invention according to claim 1, extends along the vehicle width direction, is a side cross-sectional shape having a closed cross-section portion Rutotomoni, along the longitudinal direction of the vehicle over the vehicle width direction in the closed-section portion The bumper reinforcement with the reinforcing portion disposed thereon , and the bumper reinforcement on the vehicle body outer side surface above the center in the vertical direction and disposed on the outer portion of the reinforcing portion along the vehicle width direction along the reinforcing portion. A bumper reinforcement, and a shock absorber disposed outside the vehicle body of the collision sensor, and the shock absorber has a plurality of protrusions spaced in the vertical direction toward the inside of the vehicle body. A plurality of convex portions abut against the outside of the vehicle body in the bumper reinforcement, and a portion between the convex portions below the center in the vertical direction of the bumper reinforcement. One is formed, because it extends outside of the vehicle body than to the region between the plurality of convex portions this site was formed at the arrangement position of the collision detection sensor has an excellent effect can be improved collision detection performance. Moreover, it has the outstanding effect that the collision detection performance when a collision body contact | abuts the upper side of a bumper can be improved.

  An embodiment of a vehicle bumper structure according to the present invention will be described with reference to FIGS.

  In the figure, the arrow UP indicates the vehicle body upward direction, and the arrow FR in the figure indicates the vehicle body front direction.

  As shown in FIG. 4, a bumper cover 14 of the front bumper 12 is disposed along the vehicle width direction at the lower part of the front end of the automobile body 10 of the present embodiment. A grill 18 is disposed between the vehicle width direction intermediate portion of the bumper cover 14 and the front end portion of the hood 16.

  As shown in FIG. 1, the bumper reinforcement 20 of the front bumper 12 extends along the vehicle width direction, and is installed on the front end portions 22 </ b> A of the left and right front side members 22. Further, the side cross-sectional shape of the bumper reinforcement 20 is a closed cross-sectional portion that is divided into three in the vertical direction by ribs 20A and 20B as reinforcing portions formed along the vehicle longitudinal direction with a predetermined interval in the vehicle vertical direction. 24 has a square shape.

  A bumper touch sensor 26 as a collision detection sensor is disposed along the vehicle width direction at a portion of the front wall portion 20C of the bumper reinforcement 20 on the front side of the upper rib 20A. The bumper touch sensor 26 is provided above the center Q in the vertical direction of the bumper reinforcement.

  As shown in FIG. 2, the bumper touch sensor 26 is fixed to the front wall portion 20C of the bumper reinforcement 20 via a strip-shaped bracket 27 with double-sided tape or the like. The bumper touch sensor 26 is, for example, a Hi / Low output. It is composed of switch type sensors.

  As shown in FIG. 1, a portion of the bumper reinforcement 20 and the bumper touch sensor 26 that is outside the vehicle body (front side of the vehicle body), that is, between the bumper reinforcement 20 or the bumper touch sensor 26 and the bumper cover 14, A bumper absorber foam 30 as an impact absorbing material is disposed.

  Further, on the rear wall portion of the bumper absorber foam 30, convex portions 30A, 30B, 30C, and 30D are formed toward the vehicle body inner side (vehicle body rear side) at predetermined intervals in the vehicle body vertical direction. The intermediate convex portions 30 </ b> B and 30 </ b> C are in contact with the front wall portion 20 </ b> C of the bumper reinforcement 20 in the vicinity of the bumper touch sensor 26.

  A gap 32 between the bumper touch sensor 26 and the portion 30E between the convex portion 30B and the convex portion 30C in the rear wall portion of the bumper absorber form 30 is narrow.

  On the other hand, among the convex portions 30A, 30B, 30C, and 30D, the upper convex portion 30A and the lower convex portion 30D are the upper edge portion 20D of the front wall portion 20C in the bumper reinforcement 20, the vicinity thereof, and the lower edge portion 20E. It is in contact with the vicinity.

  An engagement claw portion 30F is formed at the upper end portion of the bumper absorber foam 30 toward the inner side of the vehicle body (rear side of the vehicle body), and the lower end portion of the bumper absorber foam 30 is directed toward the inner side of the vehicle body (rear side of the vehicle body). Thus, an engaging claw 30G is formed. Further, the engaging claw portions 30F and 30G of the bumper absorber form 30 sandwich the front wall portion 20C of the bumper reinforcement 20 from the vertical direction of the vehicle body, and the bumper absorber form 30 is in the vertical direction of the vehicle body with respect to the bumper reinforcement 20 Is prevented from moving to.

  Note that the front wall portion 30H of the bumper absorber foam 30 is substantially flat in the vertical direction of the vehicle body.

  Next, the operation of this embodiment will be described.

  In the present embodiment, as shown in FIG. 4, when the collision body K1 collides with the front bumper 12, the bumper absorber foam 30 together with the bumper cover 14 of the front bumper 12 is caused by the collision body K1 as shown in FIG. Is pressed from the front side of the vehicle body toward the rear side of the vehicle body. As a result, a portion 30E between the convex portion 30B and the convex portion 30C in the rear wall portion of the bumper absorber foam 30 comes into contact with the bumper touch sensor 26, and the load F from the outside is transmitted to the bumper touch sensor 26.

  At this time, in the present embodiment, the bumper touch sensor 26 is disposed along the vehicle width direction at a portion of the front wall portion 20C of the bumper reinforcement 20 that is on the vehicle body outside (vehicle body front side) of the upper rib 20A. Yes. That is, on the vehicle body inner side (vehicle body rear side) of the front wall portion 20C of the bumper reinforcement 20 in which the bumper touch sensor 26 is disposed, the rib 20A along the vehicle body longitudinal direction in the closed cross section 24 of the bumper reinforcement 20 is provided. Is arranged.

  As a result, in this embodiment, the rigidity of the mounting position of the bumper touch sensor 26 is high. For this reason, in the present embodiment, the bumper touch sensor 26 is difficult to move to the rear side of the vehicle body when a load is applied, and stable load detection can be performed, so that the collision detection performance can be improved.

  As shown in FIG. 4, when the collision body K1 collides with the upper side of the front bumper 12, the upper side of the bumper absorber foam 30 is pressed as shown in FIG. At this time, in this embodiment, the bumper touch sensor 26 is provided above the center Q in the vertical direction of the bumper reinforcement 20. As a result, a portion 30E between the convex portion 30B and the convex portion 30C in the rear wall portion of the bumper absorber foam 30 comes into contact with the bumper touch sensor 26, and the load F from the outside is transmitted to the bumper touch sensor 26.

  On the other hand, as shown in FIG. 6, when the collision body K2 collides with the lower side of the front bumper 12, the lower side of the bumper absorber foam 30 is pressed as shown in FIG. At this time, in this embodiment, the bumper touch sensor 26 is provided above the center Q in the vertical direction of the bumper reinforcement 20. As a result, the portion 30E between the convex portion 30B and the convex portion 30C in the rear wall portion of the bumper absorber foam 30 does not contact the bumper touch sensor 26, and the load F from the outside is not transmitted to the bumper touch sensor 26. .

  Therefore, in this embodiment, when the collision body K1 is in contact with the upper side in the vertical direction Q of the bumper reinforcement 20 in the front bumper 12, the collision body K2 is in the vertical direction center of the bumper reinforcement 20 in the front bumper 12. The detection performance is improved as compared with the case of contacting the lower side than Q. For this reason, it is possible to improve the collision detection performance when the collision body contacts the upper side of the front bumper 12.

  In the above, the present invention has been described in detail with respect to specific embodiments. However, the present invention is not limited to the above embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art.

  The bumper touch sensor 26 is not limited to a switch type sensor with Hi / Low output, but may be another type of sensor such as an analog output type pressure detection sensor.

  Further, the side cross-sectional shape of the bumper reinforcement 20 is not limited to the square shape having the closed cross-sectional portion 24 divided into three in the vertical direction by the ribs 20A and 20B, and is divided into two in the vertical direction by one rib. A Japanese character shape may be sufficient. Moreover, the side cross-sectional shape of the bumper reinforcement 20 may be a ladder shape divided in the vertical direction by three or more ribs.

  In addition, the vehicle bumper structure of the present invention can be applied to bumpers other than the front bumper 12, and can also be applied to a rear bumper.

1 is a side sectional view showing a vehicle bumper structure according to an embodiment of the present invention. It is the perspective view seen from the vehicle body diagonally front which shows the principal part of the bumper structure for vehicles concerning one embodiment of the present invention. It is a sectional side view which shows a deformation | transformation state when a collision body contact | abuts the upper side of a bumper in the bumper structure for vehicles which concerns on one Embodiment of this invention. It is a side view which shows a deformation | transformation state when a collision body contact | abuts the upper side of a bumper in the vehicle body to which the bumper structure for vehicles which concerns on one Embodiment of this invention is applied. It is a sectional side view which shows a deformation | transformation state when a collision body contact | abuts the downward side of a bumper in the bumper structure for vehicles which concerns on one Embodiment of this invention. It is a side view which shows a deformation | transformation state when a collision body contact | abuts the downward side of a bumper in the vehicle body to which the bumper structure for vehicles which concerns on one Embodiment of this invention was applied.

Explanation of symbols

12 Front bumper (bumper)
14 Bumper cover 20 Bumper reinforcement 20A Bumper reinforcement rib (reinforcement part)
20B Ramp of bumper reinforcement 20C Front wall of bumper reinforcement 24 Closed section of bumper reinforcement 26 Bumper touch sensor (collision detection sensor)
30 Bumper absorber foam (shock absorber)
32 Gap between bumper absorber foam and bumper touch sensor

Claims (1)

Extending along the vehicle width direction, and the bumper reinforcement Rutotomoni is a side cross-sectional shape, the closed reinforcement portion along the longitudinal direction of the vehicle body over a vehicle width direction in the surface portion is disposed with a closed cross-section portion,
A collision detection sensor disposed on the vehicle outer side of the bumper reinforcement on the vehicle body outer side along the reinforcing portion at a position on the outer side of the vehicle body of the bumper reinforcement on the outer side of the vehicle body,
The bumper reinforcement and a shock absorber disposed outside the vehicle body of the collision sensor;
Have
The shock absorber is formed with a plurality of convex portions at intervals in the vertical direction toward the inside of the vehicle body, the plurality of convex portions abut on the vehicle body outside the bumper reinforcement, and the bumper reinforcement One of the portions between the plurality of convex portions is formed below the center in the vertical direction of the ment, and this portion is located outside the vehicle body from the portion between the plurality of convex portions formed at the position where the collision detection sensor is disposed. The bumper structure for vehicles characterized by extending in the direction.

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