JP5675384B2 - Automotive bumper face structure - Google Patents

Description

  The present invention relates to a bumper face structure of an automobile in which a bumper face upper part connected to an upper part of a bumper face main body part faces a front end of a front hood at an upper part of a bulkhead.

  A front hood of an automobile includes an outer panel 11, an inner panel 12 coupled to the lower surface of the outer panel 11, and a hood lock reinforcement 13 disposed in a front portion of a space sandwiched between the outer panel 11 and the inner panel 12. And an auxiliary reinforcement 14 disposed in a space sandwiched between the outer panel 11 and the hood lock reinforcement 13, and the front end of the hood lock reinforcement 13 is disposed at a predetermined distance behind the front end of the front hood. In addition, it is known from Patent Document 1 below that the auxiliary reinforcement 14 is arranged so as to extend from the front end of the front hood to the vicinity of the rear end of the hood lock reinforcement 13.

  According to this front hood, the outer panel 11 and the inner panel 12 ahead of the front end of the hood lock reinforcement 13 can be crushed together with the auxiliary reinforcement 14 and absorb the collision energy at the time of a frontal collision of the automobile.

  In addition, a reinforce 4 having a triangular cross section is arranged in the front space of the front hood of the automobile in which the outer panel 1 and the inner panel 2 are joined, and the fixing part 3 at the rear end of the reinforce 4 is fixed to the inner panel 2. The second bent portion 44 at the front end is locked to the locking portion 21 of the inner panel 2 and the first bent portion 41 at the center is protruded upward toward the lower surface of the outer panel 1. Is known.

  According to this front hood, when a collision load is applied from the front, the second bent portion 44 is disengaged from the locking portion 21 and the reinforcement 4 is buckled in the front-rear direction to absorb the collision energy, and the collision load is applied from above. The first bent portion 41 is pushed downward by the lower surface of the outer panel 1 and the reinforcement 4 is buckled in the vertical direction, so that the collision energy can be absorbed.

JP 2006-44544 A JP 2001-278120 A

  However, the device described in Patent Document 1 has a problem that the auxiliary reinforcement 14 is not considered for effectively absorbing the collision energy when the collision load is input from above.

  In addition, in the above-described Patent Document 2, when a strong collision load is input from above, the second bent portion 44 of the reinforcement 4 is disengaged from the engaging portion 21 of the inner panel 2, and the reinforcement 4 is There was a possibility that the collision energy could not be absorbed effectively by buckling up and down easily.

In addition, if the part that protrudes from the upper part of the bulkhead to the front of the vehicle body is not integrated with the front hood and is formed from the upper part of the bumper face that protrudes upward from the bumper face body, Sometimes it is necessary to effectively absorb the collision energy from the front and the top at the top of the bumper face.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to effectively absorb the collision energy of a collision from the front and a collision from above on the bumper face upper part.

To achieve the above object, according to the first aspect of the present invention, a bumper face structure for an automobile in which the bumper face upper part connected to the upper part of the bumper face main body part faces the front end of the front hood above the bulkhead. A plate bracket made of a synthetic resin having a front portion connected to the lower surface of the bumper face upper portion and a rear portion connected to the upper surface of the bulkhead, the plate bracket includes a substantially flat bracket body portion; and a shock absorbing portion which protrudes upward toward the lower surface of the bumper face upper from the bracket body portion, the impact absorbing portion includes a side wall portion of the left and right extending in the longitudinal direction of the vehicle body, between the upper portion of the left and right side wall portions And an upper wall portion that is curved upward and has a plurality of upper wall portions that extend in the front-rear direction via a plurality of lines extending in the left-right direction. Bumper face structure of a motor vehicle, characterized in that it is constituted by a surface is proposed.

According to a second aspect of the present invention, in the bumper face structure of an automobile in which the bumper face upper part connected to the upper part of the bumper face main body part faces the front end of the front hood at the upper part of the bulkhead, the front part is the bumper. A plate-shaped bracket made of synthetic resin connected to the lower surface of the upper face and having a rear portion connected to the upper surface of the bulkhead, the plate-shaped bracket including a substantially flat bracket main body, and the bumper bumper from the bracket main body And an impact absorbing portion projecting upward toward the lower surface of the upper portion of the face, and the impact absorbing portion is configured by a plurality of surfaces that are continuous in the front-rear direction via a plurality of lines extending in the left-right direction, and protrudes upward. includes a top wall portion which is curved, the number of said ridge of said upper wall portion is characterized by frequently at the rear side of the front portion of the impact absorbing portion Bumper face structure of Dosha is proposed.

According to the invention described in claim 3 , in addition to the configuration of claim 1 or claim 2 , the impact absorbing portion is formed with a fragile portion that locally reduces its strength. A bumper face structure for automobiles is proposed.

According to a fourth aspect of the present invention, in addition to the structure of any one of the first to third aspects, a bumper face is provided with an ornament on the front surface of the upper bumper face. A face structure is proposed.

  The emblem 11d of the embodiment corresponds to the decorative product of the present invention, and the side wall portion 29a and the thin portion 29c of the embodiment correspond to the fragile portion of the present invention.

  According to the configuration of the first aspect, the synthetic resin plate-like bracket connecting the lower surface of the bumper face upper portion connected to the upper portion of the bumper face main body portion and the upper surface of the bulkhead includes a substantially flat bracket main body portion and a bracket main body. Shock absorber that protrudes upward from the upper part toward the lower surface of the upper bumper face, so that the collision energy of the collision from the front is absorbed by the buckling in the front-rear direction of the plate bracket including the shock absorber, and from above It is possible to absorb the collision energy of this collision by crushing the impact absorbing portion of the plate bracket, and an effective energy absorption effect can be obtained in any case of a collision from the front and a collision from above.

Also, the shock absorbing portion includes a side wall portion of the left and right extending in the longitudinal direction of the vehicle body, for connecting between the upper portion of the right and left side wall portions is a box structure with an upper wall portion which is curved convexly upward, collapse thereof The amount of energy absorption can be increased by securing a sufficient margin. Moreover, since an upper wall part is comprised by the some surface which continues in the front-back direction via the some ridgeline extended in the left-right direction, a ridgeline can be made into a broken line, and the deformation | transformation of an upper wall part can be accelerated | stimulated.

According to the second aspect of the present invention, in addition to being able to obtain an effective energy absorption effect in both cases of a collision from the front and a collision from above, the deformation of the upper wall portion is promoted. Since the number of ridge lines of the wall portion is larger on the rear side than on the front side of the shock absorbing portion, the shock absorbing portion can be appropriately deformed in any case of a collision from the front and a collision from above.

Further, according to the configuration of claim 3 , since the weak part that locally reduces the strength is formed in the shock absorbing part, the energy absorption amount can be controlled by encouraging the deformation of the shock absorbing part from the weak part. Can be.

According to the fourth aspect of the present invention, since the ornament is provided on the front surface of the upper part of the bumper face, the appearance of the front part of the vehicle body can be enhanced.

The perspective view of the vehicle body front part of a motor vehicle. FIG. 2 is a sectional view taken along line 2-2 in FIG. 1. 3 is an enlarged view of part 3 of FIG. FIG. 4 is a sectional view taken along line 4-4 of FIG. FIG. 5 is a view in the direction of arrows 5 in FIG. 2. Action | operation explanatory drawing at the time of the collision from the front. Action | operation explanatory drawing at the time of the collision from the front upper direction. Explanatory drawing of the action at the time of a collision from the upper front.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In addition, the front, back, right side, and left side in this specification are defined on the basis of the passenger | crew who seated in the driver's seat.

  As shown in FIGS. 1 and 2, a front hood (bonnet hood) 15 is disposed at a position sandwiched between a front bumper 11, left and right front fenders 12, 12 and a windshield 13 of an automobile and covers an upper portion of an engine room 14. The hood frame 16 constituting the skeleton and the hood skin 17 superimposed on the upper surface of the hood frame 16 are provided.

  The front bumper 11 includes a bumper face main body portion 11a, a bumper face upper portion 11b that protrudes upward from a central portion in the left-right direction of the bumper face main body portion 11a, and an air intake portion 11c that is formed at the lower portion of the bumper face main body portion 11a. And a decorative emblem 11d provided on the front surface of the bumper face upper portion 11b. With the front hood 15 closed, the rear edge of the bumper face upper portion 11b is continuously connected to the front edge of the front hood 15. It is lined up.

  As shown in FIGS. 2 and 5, a front bracket is attached to the front portion of the hood frame 16 so that the front portion of the front hood 15 whose rear end is hinged to the vehicle body is locked to the upper portion of the bulkhead 20 in the closed position. 21, the striker 24 is supported via the rear bracket 22 and the striker bracket 23. The front bracket 21 is formed by bending a rectangular steel plate with a plurality of broken lines extending in the left-right direction, and its front edge is welded to the front lower surface of the hood frame 16.

  The rear bracket 22 is formed by bending a rectangular steel plate with a plurality of broken lines extending in the left-right direction, and its rear edge is welded w2 to the front lower surface of the hood frame 16. Then, the rectangular striker bracket 23 to which the “U” -shaped striker 24 opening upward is welded w3 is welded to the rear edge of the front bracket 21 and the front edge of the rear bracket 22 w4 and w5. On the other hand, the hood lock 27 is supported by the support bracket 26 welded to the upper rear surface of the bulkhead 20, and the lock claw 27 a of the hood lock 27 is engaged with the striker 24, so that the front hood 15 is engaged in the closed position. Stopped.

  As shown in FIGS. 1 to 4, the lower surface of the bumper face upper portion 11 b and the upper surface of the bulkhead 20 are connected by a plate bracket 18 made of synthetic resin. The plate bracket 18 elongated in the left-right direction has a front edge fixed to the lower surface of the bumper face upper portion 11b by tapping screws 19... And a rear edge fixed to the upper surface of the bulkhead 20 by rivets 25. The plate-like bracket 18 includes a substantially flat bracket main body 28 and three shock absorbing portions 29 having the same shape and projecting upward from the bracket 28 in a box shape.

  Each shock absorbing portion 29 includes a pair of left and right pentagonal side wall portions 29a and 29a that rise from the bracket main body portion 28 via side folding lines a and a, and an upper wall that connects between the upper edges of both side wall portions 29a and 29a. Part 29b. The front wall and the rear edge of the upper wall 29b are connected to the bracket body 28 via the front fold line b and the rear fold line c, and four surfaces A, 3 are formed by three ridge lines d, e, and f extending in the left-right direction. It is divided into B, C, and D. The angles formed by the four planes A, B, C, and D at the three broken lines d, e, and f are convex toward the outside (upper side) of the shock absorbing portion 29. The thicknesses of the side wall portions 29a and 29a are thinner than the thickness of the upper wall portion 29b and the thickness of the bracket main body portion 28, and the side wall portions 29a and 29a themselves are larger than the upper wall portion 29b and the bracket main body portion 28. It constitutes a vulnerable part.

  A groove-like thin portion 29c that reduces the thickness of the rear two ridgelines e and f and the lower surfaces of the ridgelines g and h formed in the left-right direction behind the shock absorbing portion 29. 2), and the strength of the plate-like bracket 18 is locally reduced by these thin portions 29c.

  Of the four surfaces A, B, C, and D of the upper wall portion 29b of the shock absorbing portion 29, the largest surface B sandwiched between the ridge lines d and e is along the lower surface of the bumper face upper portion 11b. Three adhesive application grooves 29d extending in the front-rear direction are formed on the surface B, and the surface B is the upper part of the bumper face by the adhesive 30 (see FIG. 2) applied to these adhesive application grooves 29d. Bonded to the lower surface of 11b.

  The protruding height of the upper wall portion 29b upward from the bracket main body portion 28 is higher on the rear side than on the front side of the shock absorbing portion 29. That is, the second ridge line e from the front on the rear side of the upper wall portion 29b is the highest. Of the three ridge lines d, e, and f, the first ridge line d from the front is on the front side of the shock absorbing portion 29, and the second and third ridge lines e and f from the front are on the shock absorbing portion 29. On the rear side. That is, the three ridge lines d, e, and f are densely arranged in the rear half of the shock absorbing portion 29.

  Next, the operation of the embodiment of the present invention having the above configuration will be described.

  When an automobile collides frontward with an obstacle such as a pedestrian, the portion projecting forward from the bulkhead 20 having high rigidity, that is, the portion constituted by the bumper face upper portion 11b and the plate bracket 18 is deformed to absorb the collision energy. To do.

  As shown in FIG. 6, for example, when a pedestrian's waist comes into contact with the front bumper 11 and a collision load F <b> 1 from the front is input, each impact absorbing portion 29 of the plate-like bracket 18 is compressed in the front-rear direction, and its upper wall portion The plate-shaped bracket 18 is buckled in the front-rear direction because the front fold line b, the ridge lines d, e, and f and the rear fold line c of 29b and the ridge lines g and h behind the shock absorber 29 are crushed and bent strongly, At the same time, the bumper face upper portion 11b bends downward, so that the bumper face upper portion 11b moves backward with a large stroke S1 and the collision energy is effectively absorbed.

  At this time, since the side wall portions 29a and 29a of the shock absorbing portion 29 are formed thin and easily broken, the buckling of the upper wall portion 29b can be promoted to enhance the energy absorbing effect. Moreover, since the groove-shaped thin part 29c ... is formed in the lower surface of ridgeline e, f, g, h, the bending of the plate-shaped bracket 18 in ridgeline e, f, g, h is promoted, and the energy absorption effect is further increased. Enhanced.

  As shown in FIG. 7, for example, when a pedestrian's thigh contacts the front bumper 11 and a collision load F2 from the front upper side is input, the position where the plate-like bracket 18 is fixed to the bulkhead 20 with rivets 25. A downward bending moment acts on the plate bracket 18 and the bumper face upper part 11b as a fulcrum, and they are bent downward and deformed. At this time, the thin side walls 29a and 29a of the respective shock absorbing portions 29 of the plate-like bracket 18 are easily broken, so that the ridgelines d, e, and f of the upper wall portion 29b, the rear bent line c, and the shock absorption are obtained. Since the rear ridge lines g and h of the portion 29 are extended and deformed downward, the bumper face upper portion 11b is moved backward and downward with a large stroke S2 to effectively absorb the collision energy.

  Also in this case, the deformation of the shock absorbing portion 29 is promoted by the breakage of the side wall portions 29a, 29a of the shock absorbing portion 29 and the expansion of the thin portions 29c ... on the lower surfaces of the ridge lines e, f, g, h. Therefore, the energy absorption effect is enhanced.

  As shown in FIG. 8, for example, when a pedestrian's head comes into contact with the front bumper 11 and a collision load F3 from the upper front is input, the shock absorbing portion of the plate bracket 18 from the relatively hard head. Since a local load acts on the side wall 29, the side wall portions 29 a and 29 a formed thinly on the shock absorbing portion 29, the side broken lines a and a around the shock absorbing portion 29, the front bent line b and the rear bent line c Is collapsible so that the upper wall portion 29b is crushed and broken, so that the collision energy is effectively absorbed. When the collision load is large, the plate-like bracket 18 may be broken at, for example, the position of the rear broken line c, and the impact absorption stroke is further increased by this breakage.

  As described above, in the case of a collision from the front against the front bumper 11, the collision energy is absorbed by the buckling of the entire plate bracket 18 in the front-rear direction, and the collision energy from the front upper side or the upper front side is absorbed. Can be absorbed by crushing the shock absorbing portion 29, and an effective energy absorbing effect can be obtained in both cases of a collision from the front and a collision from above. Moreover, since the impact absorbing portions 29 function as reinforcing ribs and the rigidity of the plate-like bracket 18 is increased during normal times other than the time of a collision, the impact due to the opening and closing of the front hood 15 can be sufficiently tolerated.

  Further, the shock absorbing portion 29 of the plate-like bracket 18 has a box structure including left and right side wall portions 29a, 29a and an upper wall portion 29b that is connected between the upper portions thereof and is curved upwardly. The amount of energy absorption can be increased by securing a sufficient margin. Since the upper wall portion 29b is composed of four surfaces A, B, C, and D that are continuous in the front-rear direction via a plurality of lines d, e, and f that extend in the left-right direction, the ridge lines d, e, and f are broken lines. Not only can promote the deformation of the upper wall portion 29b, but also the protruding height of the upper wall portion 29b upward from the bracket body portion 28 is higher on the rear side than the front side of the shock absorbing portion 29, When the collision load is input from the front upper side, the upper wall portion 29b can be effectively deformed. Moreover, since the number of ridge lines d, e, and f of the upper wall portion 29b is larger on the rear side than on the front side of the shock absorbing portion 29, the shock absorbing portion can be used in both cases of a collision from the front and a collision from above. 29 can be appropriately deformed.

  Further, the energy absorption amount can be controlled by encouraging deformation of the shock absorbing portion 29 starting from the ridgelines e and f formed with the thin side walls 29a and 29a or the thin portion 29c of the shock absorbing portion 29. can do. Moreover, since the plate-shaped bracket 18 includes the three shock absorbing portions 29 arranged in the left-right direction, the shock absorbing performance can be enhanced at an arbitrary position in the vehicle width direction at the front portion of the plate-shaped bracket 18.

  The embodiments of the present invention have been described above, but various design changes can be made without departing from the scope of the present invention.

  For example, in the embodiment, the plate-like bracket 18 includes three shock absorbing portions 29... But the number of the shock absorbing portions 29 is arbitrary.

  In the embodiment, the upper wall portion 29b of the shock absorbing portion 29 includes three ridge lines d, e, and f, but the number of ridge lines is arbitrary.

  In the embodiment, the fragile portion of the shock absorbing portion 29 is constituted by the thin wall portions 29c and 29c formed on the ridge lines e and f, or is constituted by the thin side wall portions 29a and 29a itself. A weak part can be comprised by the opening and notch which were formed in.

11a Bumper face body 11b Bumper upper part 11d Emblem (decoration)
15 Front Hood 18 Plate Bracket 20 Bulkhead 28 Bracket Main Body 29 Shock Absorbing Part 29a Side Wall (Vulnerable Part)
29b Upper wall part 29c Thin part (fragile part)
A, B, C, D plane d, e, f

Claims (4)

In the bumper face structure of an automobile, the bumper face upper part (11b) connected to the upper part of the bumper face main body part (11a) faces the front end of the front hood (15) at the upper part of the bulkhead (20).
A plate bracket (18) made of a synthetic resin having a front portion connected to the lower surface of the upper bumper face (11b) and a rear portion connected to the upper surface of the bulkhead (20) is provided. is substantially flat bracket body portion (28), and a shock absorbing portion (29) projecting upwardly toward the lower surface of the bracket body portion (28) from the bumper face upper (11b), said shock absorbing The portion (29) includes left and right side wall portions (29a) extending in the longitudinal direction of the vehicle body, and an upper wall portion (29b) that curves upward and connects between the upper portions of the left and right side wall portions (29a). , the upper wall portion (29 b) a plurality of ridge lines extending in the lateral direction (d, e, f) a plurality of surfaces connected to the front-rear direction through the (a, B, C, D ) , wherein Rukoto consists of The bumper face structure of the car . In the bumper face structure of an automobile, the bumper face upper part (11b) connected to the upper part of the bumper face main body part (11a) faces the front end of the front hood (15) at the upper part of the bulkhead (20).
A plate bracket (18) made of a synthetic resin having a front portion connected to the lower surface of the upper bumper face (11b) and a rear portion connected to the upper surface of the bulkhead (20) is provided. Comprises a substantially flat bracket main body portion (28) and an impact absorbing portion (29) projecting upward from the bracket main body portion (28) toward the lower surface of the upper bumper face (11b). The part (29) is composed of a plurality of surfaces (A, B, C, D) continuous in the front-rear direction via a plurality of lines (d, e, f) extending in the left-right direction, and is curved upward and convex. An upper wall portion (29b) is provided, and the number of the ridge lines (d, e, f) of the upper wall portion (29b) is larger on the rear side than on the front side of the shock absorbing portion (29). bumper face structure of the automobile shall be the. The front Symbol impact absorbing portion (29), characterized in that the fragile portion (29a, 29c) to reduce its intensity locally are formed, automobile bumper face according to claim 1 or claim 2 Construction. Front to be equipped ornaments (11d), characterized in, automobile bumper face structure according to any one of claims 1 to 3 before Symbol bumper face top (11b).

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