JPH1059097A - Vehicular bumper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle bumper of a lower processing cost die to its simplified structure and of improved assembling workability. SOLUTION: A bumper 1 is formed at the base of its projection 2 with a regulation part 21 adapted to fit into a reference hole 31 formed in a vehicle body for regulating the fitting position of the bumper 1 with respect to the body, and is formed on the tip side of the projection 2 with an engaging claw 27 adapted to engage with the circumferential part of the reference hole 31 for temporarily holding the bumper 1 on the body. The projection 2 is formed with a tapered guide face 28 for guiding the insertion of the engaging claw 27 and the regulation part 21 into the reference hole 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vehicle bumper.

[0002]

2. Description of the Related Art Conventionally, as shown in, for example, Japanese Patent Application Laid-Open No. 2-249739, a vehicle bumper is engaged with a locking hole provided on a body side to temporarily hold the bumper on the body side. A plurality of engaging claws and a plurality of bolt insertion holes provided opposite to the fixing holes provided on the body side to bolt the bumper to the body side are formed. Although not described in the publication, usually, the bumper is provided with a projection for restricting a mounting position of the bumper with respect to the body by being inserted into a reference hole provided on the body side.

When the vehicle bumper is mounted on the body, the protrusion is inserted into the reference hole to regulate the mounting position of the bumper with respect to the body. Then, the bumper is temporarily held on the body side by engaging the engaging claw with the locking hole.
The bumper is fixed to the body by aligning the bolt insertion hole with the fixing hole, and inserting a bolt from the bolt insertion hole into the fixing hole.

[0004]

However, according to the above construction, a projection for regulating the position, an engaging claw and a bolt insertion hole are formed on the bumper side, and the reference hole and the locking hole are also formed on the body side. Further, since it is necessary to form the fixing holes, not only the structure becomes complicated, but also the processing cost increases. In addition, during the assembling work, in a state where the protrusion is inserted into the reference hole,
Since it is necessary to perform alignment between the engaging claw and the locking hole and the bolt insertion hole and the fixing hole, the number of assembling steps is increased and workability is deteriorated.

An object of the present invention is to provide a vehicle bumper which can simplify the structure, reduce the processing cost, and enhance the workability at the time of assembly.

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 is based on a reference hole 3 provided in a body side.
In a vehicle bumper provided with a projection 2 for regulating the mounting position of the bumper with respect to the body by being inserted into the base 1, the regulation for fitting the base hole of the projection 2 to the reference hole 31 to regulate the mounting position of the bumper with respect to the body. A projection 21 is provided on the tip end side of the projection 2 to engage with the peripheral edge of the reference hole 31 to temporarily hold the bumper on the body side. On the side opposite to the part where the engagement claw 27 is formed,
A tapered guide surface 28 for guiding the engagement claw 27 and the restricting portion 21 into the reference hole 31 is provided.

[0007]

According to the first aspect of the present invention,
When assembling the bumper on the body side, the entire protrusion 2 protruding from the bumper is inserted from the outside of the reference hole 31 provided on the body side, and the restriction provided on the base end side of the protrusion 2 in the reference hole 31 By fitting the portion 21, the mounting position of the bumper with respect to the body can be regulated, so that the fixing holes provided in the bumper and the body can be accurately positioned, and the bumper can be easily fixed to the body side. .

At this time, the projection 2 has its engaging claw 2
Since the guide surface 28 is formed to guide the guide 7 and the restricting portion 21 along the peripheral edge of the reference hole 31, the guide surface can be formed simply by pushing the bumper 2 toward the body with the protrusion 2 facing the reference hole 31. While the entire protrusion 2 is guided by 28, the restricting portion 21 can be smoothly and easily fitted into the reference hole 31. That is, the mounting position of the bumper with respect to the body can be easily controlled to improve workability. it can.

When the positioning holes of the projections 2 are fitted in the reference holes 31 and the positioning of the fixing holes is performed or the gaps between these holes are fixed with bolts, the bumper moves without permission. When the restricting portion 21 of the projection 2 comes off from the reference hole 31, the engaging claw 27 provided on the projection 2 engages with the peripheral edge of the reference hole 31, so that the bumper is detached from the body side. This bumper can be maintained in a state of being temporarily held on the body side without any trouble. In addition, the bumper is lifted and pushed into the body side from the temporary holding state, and the entire protrusion 2 is guided by the guide surface 28 in the same manner as described above, so that the regulating portion 21 is smoothly inserted into the reference hole 31. The fitting can be performed, and the mounting position of the bumper with respect to the body can be easily regulated again.

In addition, since the projection 2 is provided integrally with the temporary holding engagement claw 27 which engages with the peripheral portion of the reference hole 31, the projection and the engagement are provided on the bumper side as in the conventional case. As compared with a case where claws are separately provided, and a reference hole into which the protrusion is inserted and a locking hole for locking the engaging claw are separately provided on the body side, the structure can be simplified and the processing cost can be reduced. it can. Further, when the projection 2 is inserted into the reference hole 31, the projection 2 and the engagement claw 27 are simultaneously inserted into the reference hole 31, so that the engagement claw 27 is This eliminates the need for a positioning operation for inserting the bumper into the stop hole, thereby improving the workability of assembling the bumper to the body.

[0011]

FIG. 5 shows a vehicle bumper made of a synthetic resin. The bumper 1 has a grill portion 12 formed at the upper center of a bumper main body 11, and the upper portion of the grill portion 12 is long. A belt-shaped projecting piece 13 extending upward is provided on one side in the direction of the length, and a pair of left and right bolt insertion holes 14, 14 for bolting the bumper 1 to the body side is formed on the projecting piece 13. At the intermediate portion of each of the insertion holes 14, on the back side of the protruding piece 13, a projection is inserted through a reference hole 31 (FIG. 1) provided in the body side panel 3 to regulate the mounting position of the bumper 1 with respect to the body side panel 3. 2 are protruding. FIG.
5 shows a half sectional view cut from the longitudinal center of the bumper 1. The projecting pieces 13 are formed as a set of left and right sides on both sides in the longitudinal direction of the bumper 1. The hole 14 and the projection 2 are provided.

The projection 2 is, as shown in FIGS.
It is provided on the protruding base side and has the same or slightly smaller diameter as the circular reference hole 31 provided in the body side panel 3, and fits into the reference hole 31 to regulate the mounting position of the bumper 1 with respect to the body side panel 3. An arc-shaped restricting portion 21, a bullet-shaped head 22 provided on the same axial line as the restricting portion 21 on the protruding tip side, and having a smaller diameter than the restricting portion 21. 4 protruding radially between the regulating portion 21
The first to fourth connecting portions 23 to 26 are provided, and extend outward in the radial direction on the outer surface side of the first connecting portion 23 located at the lower side of each figure among these persons. Forming an engaging claw 27 for temporarily holding the bumper 1 on the body-side panel 3 by engaging with the peripheral portion of the reference hole 31 and the outer surfaces of the remaining second to fourth connecting portions 24-26. On the side, the head 22
The taper shape is such that the diameter is small on the side and the diameter of the regulating portion 21 is large on the side,
A guide surface 28 for guiding the insertion of the engaging claw 27 and the restricting portion 21 into the reference hole 31 is formed.

In each of the embodiments shown in the drawings, a first inclined surface 28a having a gentle inclination from the head 22 to the front side of the restricting portion 21 is used as each of the guide surfaces 28.
A steep second inclined surface 28b is formed from the end of the inclined surface 28a to the regulating portion 21, and the rear end surface of the engaging claw 27 is matched with a boundary portion 28c between the inclined surfaces 28a and 28b. ing. Then, as shown in FIG. 1, the diameter of the reference hole 31 is R1, and each of the inclined surfaces 28a provided on the guide surface 28 of the third connecting portion 25 disposed above the engaging claw 27 so as to face upward. When the outer diameter between the boundary portion 28c of the engaging claw 28b and the outer peripheral surface of the engaging claw 27 is R2, R
It is set so that 1 ≧ R2.

Next, a procedure for assembling the bumper 1 to the body side panel 3 will be described. First, bumper 1
Reference hole 3 provided in body side panel 3 with projection 2
1 to 2 and the second to fourth connecting portions 2 provided on the projections 2.
By pressing the bumper 1 toward the panel 3 while sliding the respective guide surfaces 28 of 4 to 26 against the peripheral edge of the reference hole 31, the restricting portion 21 of the projection 2 is moved to the reference hole 3 as shown by the solid line in FIG.
1 is fitted.

At this time, the diameter R1 of the reference hole 31 and each inclined surface 28 provided on the guide surface 28 of the third connecting portion 25 are set.
Since the outer diameter R2 between the boundary portion 28c between the a and 28b and the outer peripheral surface of the engaging claw 27 satisfies R1 ≧ R2, when the projection 2 is inserted into the reference hole 31, first, By inserting the first inclined surface 28a provided on each guide surface 28 of the second to fourth connecting portions 24 to 26 to the boundary portion 28c while slidingly contacting the peripheral edge of the reference hole 31, the engaging claw 2 is formed.
7 can be inserted smoothly without being hooked on the reference hole 31, and a second inclined surface 28b provided on each guide surface 28 of the second to fourth connecting portions 24 to 26 thereafter.
Is inserted into the peripheral portion of the reference hole 31 while being slidably contacted with the reference hole 31 so that the restricting portion 21 can be smoothly fitted to the reference hole 31, and the mounting position of the bumper 1 with respect to the body side panel 3 can be easily regulated. Can be.

Then, with the regulating portion 21 of the projection 2 fitted in the reference hole 31, each bolt insertion hole 14 provided in the projecting piece 13 of the bumper 1 and a fixing hole provided in the body side panel 3 (shown in FIG. The bumper 1 is mounted on the body side panel 3 by screwing bolts from outside the bolt insertion holes 14 into the fixing holes. At this time, the fitting position of the bumper 1 with respect to the body side panel 3 can be regulated by fitting the regulating portion 21 into the reference hole 31, so that the positioning operation between each bolt insertion hole 14 and the fixing hole is performed accurately. In addition, the bolt insertion work into each hole can be easily performed, and the assembling workability can be improved.

Further, when the positioning of the bolt insertion holes 14 and the fixing holes is performed or the bolts are inserted into these holes in a state where the restricting portions 21 are fitted in the reference holes 31, the bumper 1 is used. Moves without permission, and the regulation part 21
In the case where the user has departed from, as shown by a virtual line in FIG.
Since the engaging claw 27 provided on the first connecting portion 23 of the projection 2 engages with the peripheral portion of the reference hole 31, the bumper 1 does not come off from the body side panel 3, and Can be maintained in the temporary holding state on the body side panel 3. Then, from this temporary holding state, the bumper 1 is pushed upward and pushed into the body side panel 3, and the entire projection 2 is guided by the respective guide surfaces 28, so that the regulating portion 21 is smoothly inserted into the reference hole 31. Can be mated,
Restriction of the mounting position of the bumper 1 with respect to the body side panel 3 can be easily performed again.

In addition, since the first connection portion 23 of the projection 2 is provided integrally with the temporary holding engagement claw 27 which engages with the peripheral portion of the reference hole 31, the structure can be simplified as compared with the conventional case. Processing cost can be reduced. Further, when the projection 2 is inserted into the reference hole 31, the projection 2 and the engaging claw 27 are inserted into the reference hole 31 at the same time. Can be enhanced.

In the embodiment shown in each of the drawings, a part of the protruding piece 13 of the bumper 1 and a part of the outer periphery of the restricting portion 21 and the first connecting portion 23 provided on the protrusion 2 are connected to the first connecting portion 23. First and second holes 10 and 20 are formed to be used for cutting when the provided engaging claw 27 is formed by a mold. More specifically, a part of the projecting piece 13 of the bumper 1
3 is formed at a position facing the outer surface 3 of the protruding piece 13, the first hole 10 having a frusto-conical shape having a large diameter on the outer surface side and a small diameter on the back side, and is regulated to be continuous with the first hole 10. A second hole 20 whose lower side is opened is formed between a part of the outer periphery of the part 21 and a part of the outer periphery of the first connecting part 23 and the back side of the engaging claw 27.

According to such a configuration, when the resin bumper 1 is molded, as shown in FIG. 5, the entire back side of the bumper 1 and the restricting portion 21, the head 22, and the A first mold 3 for molding the entire outer surface of the first to fourth connecting portions 23 to 26 and the protruding portion of the engaging claw 27, and a second mold 4 for molding the entire surface side of the bumper 1 are used. By forming a projection 41 for molding the back side of the engaging claw 27 on the second mold 4, two molds 3 and 4 are used, and the moving directions of the molds 3 and 4 are set back and forth. While forming the bumper 1 in two directions, the whole of the projection 2 can be easily formed at the same time.

That is, as described above, when the engaging claws 27 projecting outward in the radial direction are formed on the outer surface side of the first connecting portion 23 provided on the projection 2, usually, the engaging claws 27 are formed. 2
While a plurality of slide cores are required for molding 7, a part of the projecting piece 13 facing the first connecting part 23 and a part of the first connecting part 23 on the projecting piece 13 side are By forming the holes 10 and 20 respectively, the projections 4 provided in the second mold 4 are provided with the holes 10 and 20.
The back side of the engaging claw 27 can be formed at the tip side of the projection 41 while being able to form one die-cutting hole.

At least the second hole 20 of each of the holes 10 and 20 is formed to be smaller in diameter than the restricting portion 21 of the projection 2, and the second hole of the restricting portion 21 is formed. 2
An engagement surface when fitted in the reference hole 31 is secured to the outer peripheral surface excluding 0. By doing so, the restricting portion 21 can be fitted into the reference hole 31 without falling off, and the mounting position of the bumper 1 on the body side panel 3 can be restricted.

In the above-described embodiment, the engagement provided on the first connecting portion 23 is formed on a part of the projecting piece 13 of the bumper 1 and on a part of the outer circumference of the restricting portion 21 and the first connecting portion 23 provided on the projection 2. First and second hole portions 10 and 20 for forming a die when the claw 27 is formed by a mold are formed.
As schematically shown in FIG. 3, the bumper 1 has a diameter substantially the same as that of the circular reference hole 31 provided in the body-side panel 3 and is closely fitted to the reference hole 31 so that the bumper 1 is positioned on the body side. A cylindrical regulating portion 21 for regulating the mounting position with respect to the panel 3; and a bullet-shaped head provided on the same axis as the regulating portion 21 on the protruding tip side and having a smaller diameter than the regulating portion 21. 22 and a rod-shaped connecting portion 240 connecting the head 22 and the restricting portion 21 to form the connecting portion 24.
0, on one side of the outer peripheral surface, the engaging claw 27 is protruded,
The outer peripheral surface of the connecting portion 240 has a tapered shape in which the head 22 side has a small diameter and the regulating portion 21 has a large diameter, and is used to guide insertion of the engaging claw 27 and the regulating portion 21 into the reference hole 31. The guide surface 28 may be formed.

In the embodiment shown in FIG. 6 as well, the diameter of the reference hole 31 is R3, and the distance between the guide surface 28 facing the engaging claw 27 and the outer peripheral surface of the engaging claw 27 is When R4, R3 ≧ R4.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a main part of a vehicle bumper according to the present invention.

FIG. 2 is a side view showing a protrusion of the bumper.

FIG. 3 is a front view thereof.

FIG. 4 is an explanatory view when a vehicle bumper is formed.

FIG. 5 is an explanatory view of a main part of the bumper as viewed from the front.

FIG. 6 is a schematic side view showing another embodiment of the projection.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Bumper 2 ... Protrusion 21 ... Restriction part 27 ... Engagement claw 28 ... Guide surface 31 ... Reference hole

Claims (1)

[Claims] 1. A vehicle bumper comprising a projection (2) which is inserted into a reference hole (31) provided on a body side and regulates a mounting position of the bumper with respect to the body.
A restricting portion (21) that fits into the reference hole (31) and regulates a mounting position of the bumper with respect to the body;
At the distal end side of the projection (2), an engaging claw (27) that engages with the peripheral portion of the reference hole (31) to temporarily hold the bumper on the body side is provided so as to protrude radially outward. A tapered guide surface (28) for guiding the insertion of the engaging claw (27) and the restricting portion (21) into the reference hole (31) is provided on a side opposite to the portion where the engaging claw (27) is formed. ) Is provided.