JP2008094268A - Spare tire carrier device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a spare tire carrier device capable of reducing the weight and facilitating assembling work. <P>SOLUTION: A carrier bracket 1 is made of synthetic resin, and bolts 2 to 4 are insert-molded in the carrier bracket 1. The bolts 2 to 4 have screw shaft parts 10 having male screws formed thereon and head parts 12 inserted into the carrier bracket 1. The head part 12 has a small diameter part 14 continued and connected to the screw shaft part 10 and a large diameter part 16 having an outer shape larger than that of the small diameter part 14. An end face 14a in the screw shaft part 10 side of the small diameter part 14 is arranged on approximately the same plane as a flat face 6a of the carrier bracket 1 or outwardly from the flat face 6a of the carrier bracket 1, and is exposed. A plurality of fitting holes 24 to an automobile side are formed in the carrier bracket 1, and metallic collars 28 having flange parts 28b, 28c at both sides are inserted to the fitting holes 24. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a spare tire carrier device that removably supports a spare tire on an automobile.

Conventionally, as disclosed in Patent Document 1, a carrier bracket in which a plurality of bolts are erected is attached to an automobile, the bolt is inserted into a mounting hole of a tire wheel, a nut is screwed into the bolt, and a spare tire There is known a spare tire carrier device that removably supports the tire. At this time, the plurality of bolts are inserted into through holes formed in the carrier bracket, and the bolts are fixed to the carrier bracket by welding.
JP 2002-37145 A

  However, in such a conventional apparatus, since the bolt is fixed to the carrier bracket made of sheet metal by arc welding or spot welding, there is a problem that the weight increases and the work such as welding becomes complicated.

  An object of the present invention is to provide a spare tire carrier device that can reduce the weight and simplify the assembling work.

In order to achieve this problem, the present invention has taken the following measures in order to solve the problem. That is,
In a spare tire carrier device to which a spare tire is detachably attached by inserting the bolt of a carrier bracket attached to an automobile and having a plurality of bolts erected into an attachment hole of a tire wheel,
The carrier bracket is molded from a synthetic resin, and the bolt is insert molded into the carrier bracket.
The bolt has a screw shaft portion on which a male screw is formed and a head portion inserted into the carrier bracket, and the head portion has a small diameter portion connected to the screw shaft portion and a larger outer diameter than the small diameter portion. A diameter portion, and an end surface of the small-diameter portion on the screw shaft portion side is substantially flush with the flat surface of the carrier bracket, or is arranged and exposed outside the flat surface of the carrier bracket. This is a spare tire carrier device characterized by:

  The large-diameter portion may have a configuration in which an outer shape in the vertical direction of the automobile is formed larger than an outer shape in the width direction. The carrier bracket may be formed with a plurality of mounting holes on the vehicle side, and a metal collar having flanges on both sides is inserted into the mounting holes. At this time, after forming the carrier bracket, the collar having the collar portion formed on one side is inserted into the mounting hole, and the collar portion on the other side is formed and inserted by caulking. That's fine.

  Further, the carrier bracket includes a support plate portion on which a plurality of the bolts are erected, a side plate portion extending from the four sides of the support plate portion to the automobile side, and the attachment hole connected to the side plate portion. A pair of upper and lower mounting plate portions provided, and the side plate portion in the width direction is cut off in an arc shape on the automobile side, and a folded portion is provided at an edge between the mounting plate portion and the side plate portion It is good.

  In the spare tire carrier device of the present invention, since the carrier bracket is molded from synthetic resin, the weight can be reduced and the bolts are insert-molded, so that the assembly is facilitated. Further, the end surface of the small diameter portion of the bolt is exposed on the same plane as the flat surface of the carrier bracket or outside the flat surface of the carrier bracket so that the tire wheel is exposed between the end surface of the small diameter portion and the nut. Thus, torque reduction can be prevented and wear resistance can be improved.

  When the large-diameter portion is formed such that the vertical outer shape of the automobile is larger than the outer shape in the width direction, the load resistance can be increased without increasing the weight. Further, by inserting a metal collar having a collar portion into the mounting hole of the carrier bracket, it is possible to prevent torque reduction and improve wear resistance. When the collar is inserted by caulking, assembly work is facilitated.

  Further, when the carrier bracket is formed by the support plate portion, the side plate portion, the pair of mounting plate portions, and the folded portion, the weight can be reduced and sufficient strength can be secured.

The best mode for carrying out the present invention will be described below in detail with reference to the drawings.
As shown in FIG. 1, reference numeral 1 denotes a carrier bracket, and a plurality of bolts 2 to 4 are erected on the carrier bracket 1 in the present embodiment. The carrier bracket 1 includes a support plate portion 6 in which three bolts 2 to 4 are erected. The support plate portion 6 has a substantially rectangular flat surface 6a, and the bolts 2 to 4 protrude from the flat surface 6a. Has been.

  As shown in FIG. 8, the bolt 2 includes a screw shaft portion 10 in which a male screw is formed and a head portion 12 embedded in the support plate portion 6, and the head portion 12 has a small diameter connected to the screw shaft portion 10. A portion 14 and a large diameter portion 16 having an outer shape larger than that of the small diameter portion 14 are provided. In the present embodiment, the small diameter portion 14 is formed in a columnar shape, and the outer diameter of the small diameter portion 14 is formed larger than the outer diameter of the screw shaft portion 10. As shown in FIG. 8A, the outer diameter of the large-diameter portion 16 is formed in a substantially oval shape, and the longitudinal direction of the large-diameter portion 16 protrudes radially outward from the small-diameter portion 14, The short direction of the portion 16 is formed to be the same as the outer diameter of the small diameter portion 14.

  The bolt 2 is embedded in the support plate portion 6, and at this time, the flat surface 6 a and the end surface 14 a of the small diameter portion 14 on the screw shaft portion 10 side are formed so as to be arranged on substantially the same plane. The end surface 14a of the small-diameter portion 14 is not retracted inward of the flat surface 6a, and the end surface 14a is disposed on the same plane as the flat surface 6a, or the end surface 14a is disposed so as to protrude outward from the flat surface. The end surface 14a of the small diameter portion 14 is exposed. The large diameter portion 16 is embedded substantially in the middle of the support plate portion 6 in the thickness direction. The support plate 6 is formed so that the thickness around the bolt 2 is large.

  The other two bolts 3 and 4 have the same shape as the bolt 2 described above, and are similarly embedded in the support plate portion 6. The bolt 2 is provided on the lower side in the vertical direction of the automobile shown in FIG. 1, and the other two bolts 3 and 4 are arranged in the horizontal direction on the upper side in the vertical direction. When the three bolts 2 to 4 are insert-molded, the large-diameter portion 16 is arranged so that the longitudinal direction is the vertical direction, as shown in FIG.

  The bolt 2 is not limited to the shape described above, and the large-diameter portion 16a may be rectangular as shown in FIG. At this time, the long side of the large diameter portion 16 may be formed so as to protrude from the external shape of the small diameter portion 14, and the short side may be formed to be the same as the external shape of the small diameter portion 14. Moreover, as shown in FIG. 11, the large diameter part 16b may be formed in a cylindrical shape having a larger outer shape than the small diameter part 14, and the hexagonal hole 17 may be formed in the center.

  A side plate portion 18 extends from the four sides of the support plate portion 6, and the side plate portion 18 extends to the vehicle side (not shown). The side plate portion 18 is substantially plate-shaped, and a pair of upper and lower mounting plate portions 20 and 22 are provided on the automobile side. The pair of upper and lower mounting plate portions 20 and 22 protrude from the side plate portion 18 in the vertical direction.

  Each of the pair of upper and lower mounting plate portions 20 and 22 is formed with two mounting holes 24 (only a part is shown, see FIG. 7). A collar 28 is inserted into each mounting hole 24. As shown in FIG. 9, the collar 28 includes a cylindrical portion 28 a, and the cylindrical portion 28 a is formed in a shape that can be inserted into the mounting hole 24.

  A flange portion 28b is formed at one end of the cylindrical portion 28a. The cylindrical portion 28a is inserted into the mounting hole 24, and the flange portion 28b is abutted against the mounting plate portions 20 and 22. And the end of the cylindrical part 28a which protrudes from the attachment hole 24 is expanded radially outward by caulking work, and the collar part 28c is formed. Therefore, the collar 28 is inserted and attached to the mounting plate portions 20 and 22 with the mounting plate portions 20 and 22 being sandwiched from both sides by the two flange portions 28b and 28c.

  The mounting plate portions 20 and 22 are formed with flat mounting surfaces 20a and 22a on the vehicle side, and a mounting hole 24 on the mounting surfaces 20a and 22a is formed with a countersink portion 24a. Is formed in the countersink portion 24a, and is formed so that the surface of the flange portion 28c and the mounting surfaces 20a, 22a are arranged on substantially the same plane. At this time, it is preferable that at least the surface of the flange portion 28c does not enter the countersink portion 24a more than the attachment surfaces 20a and 22a, and the surface of the flange portion 28c protrudes from the attachment surfaces 20a and 22a.

  The left and right side plate portions 18 to which the pair of attachment plate portions 20 and 22 are not attached are cut out in an arch shape, and the pair of upper and lower attachment plate portions 20 and 22 and the side plate cut out in an arch shape. Folded portions 32 are formed on the entire circumference along the respective edges of the portion 18. The folded portion 32 is formed by folding back to the support plate portion 6 side.

  The carrier bracket 1 is made of a synthetic resin containing reinforcing fibers, for example, polypropylene containing glass fibers, and is formed by stamping molding or injection molding, and the bolts 2 to 4 and the collar 28 are made of metal. The bolts 2 to 4 are insert-molded during stamping molding or injection molding, and the collar 28 is attached after the carrier bracket 1 is molded.

Next, the operation of the above-described spare tire carrier device of the present embodiment will be described.
A bolt (not shown) is inserted into the cylindrical portion 28a of the collar 28 and attached to the automobile side. Then, as shown in FIG. 12, the three bolts 2 to 4 are inserted into the mounting holes 41 of the tire wheel 40, and the nuts 42 are screwed into the three bolts 2 to 4, respectively, and tightened.

  When the carrier bracket 1 is mounted on the vehicle side, the mounting surfaces 20a and 22a of the pair of upper and lower mounting plate portions 20 and 22 are pressed against the mounting surface on the vehicle side (not shown), and bolts (not shown) are inserted and attached. When tightening the bolt, the head portion of the bolt contacts the collar portion 28b of the collar 28, and the collar portion 28c contacts the mounting surface on the automobile side.

  As a result, when the bolt is screwed in and rotated, the head of the bolt rotates while being in contact with the flange portion 28b, so that the mounting plate portions 20 and 22 are scraped or worn by the head of the bolt. Thus, it is possible to prevent the mounting plate portions 20 and 22 of the carrier bracket 1 from falling down and torque down.

  Further, when the tire wheel 40 is attached to the three bolts 2 to 4, the tire wheel 40 comes into contact with the end surface 14 a of the small diameter portion 14, so that the flat surface 6 a of the support plate portion 6 is worn or loosened. Thus, torque down can be prevented.

  The present invention is not limited to such embodiments as described above, and can be implemented in various modes without departing from the gist of the present invention.

It is a perspective view of a spare tire carrier device as one embodiment of the present invention. It is a front view of the spare tire carrier device of this embodiment. It is a side view of the spare tire carrier device of this embodiment. It is a top view of the spare tire carrier device of this embodiment. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is an enlarged view of the bolt of this embodiment. It is an enlarged view of the color before insertion of this embodiment. It is an enlarged view of another bolt of this embodiment. It is an enlarged view of other bolts of the present embodiment. It is explanatory drawing of the state which inserted the volt | bolt of this embodiment in the tire wheel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Carrier bracket 2-4 ... Bolt 6 ... Supporting plate part 6a ... Flat surface 10 ... Screw shaft part 12 ... Head 14 ... Small diameter part 14a ... End surface 16, 16a, 16b ... Large diameter part 18 ... Side plate part 20, 22 ... Mounting plate portions 20a, 22a ... Mounting surface 24 ... Mounting hole 28 ... Collar 28a ... Cylindrical portions 28b, 28c ... Wheel 40 ... Tire wheel 41 ... Mounting hole 42 ... Nut

Claims (5)

In a spare tire carrier device to which a spare tire is detachably attached by inserting the bolt of a carrier bracket attached to an automobile and having a plurality of bolts erected into an attachment hole of a tire wheel,
The carrier bracket is molded from a synthetic resin, and the bolt is insert molded into the carrier bracket.
The bolt has a screw shaft portion on which a male screw is formed and a head portion inserted into the carrier bracket, and the head portion has a small diameter portion connected to the screw shaft portion and a larger outer diameter than the small diameter portion. A diameter portion, and an end surface of the small-diameter portion on the screw shaft portion side is substantially flush with the flat surface of the carrier bracket, or is arranged and exposed outside the flat surface of the carrier bracket. Spare tire carrier device characterized by the above.   2. The spare tire carrier device according to claim 1, wherein the large-diameter portion is formed such that an outer shape in a vertical direction of the automobile is larger than an outer shape in a width direction.   2. The carrier bracket is formed with a plurality of mounting holes on the side of the automobile, and a metal collar having flanges on both sides is inserted into the mounting holes. The spare tire carrier device according to claim 2.   The collar having the flange portion formed on one side is inserted into the mounting hole after the carrier bracket is molded, and the flange portion on the other side is formed and inserted by caulking. Item 4. The spare tire carrier device according to Item 3.   The carrier bracket is provided with a support plate portion on which a plurality of the bolts are erected, a side plate portion extending from the four sides of the support plate portion to the automobile side, and the attachment hole provided to the side plate portion. A pair of upper and lower mounting plate portions, and the side plate portion in the width direction is cut out in an arc shape on the automobile side, and a folded portion is provided at an edge between the mounting plate portion and the side plate portion. The spare tire carrier device according to any one of claims 1 to 4.

Images