JPH09177747A - Bolt provided with guide bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable smooth attachment without separation of a synthetic resin part by forming a connecting bar having the diameter smaller than that of a screw part and provided with an annular groove on the tip of a screw part, insert molding a synthetic resin guide bar having the diameter smaller than that of the screw part on the outer periphery, and forming the tip into a spherical surface. SOLUTION: A non disk-like head part 1 and a screw part 2 are provided, a connecting bar 3 is integrally formed on the tip of the screw part 2 simultaneously to rolling of the screw part 2, an annular groove 4 having the V-shaped section is formed on the way of it, and the diameter of the connecting bar 3 is formed smaller than that of the screw part 2. A synthetic resin guide bar 5 is integrated with the connecting bar 3 from the cuter periphery of the connecting bar 3 to the tip by insert molding, the outside diameter is formed smaller than that of the screw part 2, and the tip is formed into a spherical surface 6. The head part 1 is inserted into an attaching hole of an exterior part and fixed so as not to be turned, and an attaching plate is inserted from the tip of the guide bar 5 and fastened by a nut. Accordingly, the synthetic resin part is not separated even if it is brought in contact with the attaching hole and even if it is pried when it is inserted through the attaching hole, hole following easiness is excellent due to the spherical surface, and insertion can be smoothly performed without damaging the attaching plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolt with a guide rod used for mounting a relatively large component such as a rear spoiler or a bumper of an automobile.

[0002]

2. Description of the Related Art As a bolt with a guide rod used for mounting the above-mentioned relatively large-sized parts, a bolt shown in FIG.
The shape shown in is known. This guide rod bolt is a thin guide rod 23 formed by cutting the tip of a threaded portion 22 having a substantially rectangular plate-shaped head portion 21 so as not to damage the mounting plate or the like. A vinyl chloride coating 24 is applied to the tip of the outer peripheral portion of the guide rod 23, or a synthetic resin cap 25 is used on the tip as shown in the lower part of FIG.

FIG. 4 is a view showing a method of using the above-mentioned bolt with a guide rod, in which a mounting portion for an exterior part 26 such as a bumper is attached.
A substantially rectangular plate-shaped head 21 is inserted into 27 and fixed so as not to rotate, and a mounting plate 28 is inserted from the tip of the guide rod 23 and tightened with a nut 29.

However, this bolt with a guide rod is
The vinyl chloride coating 24 on the outer peripheral portion of 23 and the cap 25 made of synthetic resin may come into contact with the mounting hole 29 of the mounting plate 28 and easily peel off at the time of insertion, and smooth mounting may not be possible.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art and provides a bolt with a guide rod that can be smoothly attached without the risk of the synthetic resin portion at the tip peeling off. It was made.

[0006]

A bolt with a guide rod according to the present invention, which has been made to solve the above-mentioned problems, has a threaded portion having a non-circular plate-shaped head and a diameter smaller than that of the threaded portion. In addition to forming a connecting rod with an annular groove in the middle by rolling, on the outer circumference of this connecting rod, a guide rod made of synthetic resin with a diameter smaller than the screw part was provided by insert molding, and its tip was made spherical. It is characterized by that.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 is a non-circular plate-shaped head portion, and 2 is a screw portion provided upright on the head portion 1. A connecting rod 3 is integrally formed at the tip of the threaded portion 2 at the same time when the threaded portion 2 is rolled. Although the length of the connecting rod 3 is shorter than that of the conventional guide rod 23,
An annular groove 4 having a V-shaped cross section is also formed in the middle by rolling. The connecting rod 3 has a smaller diameter than the threaded portion 2.

Reference numeral 5 denotes a synthetic resin guide rod projecting from the outer periphery of the connecting rod 3 toward the tip. The guide rod 5 is integrated with the connecting rod 3 by an insert molding method, and has an outer diameter smaller than that of the screw portion 2. The tip of this guide rod 5 is formed into a spherical surface 6.

As shown in FIG. 2, the guide rod bolt of the present invention constructed as described above is rotated by inserting a substantially rectangular plate-shaped head 1 into a mounting portion 8 of an exterior component 7 such as a bumper. The fixing plate 9 is fixed so that it does not exist, and the mounting plate 9 is inserted from the tip of the guide rod 5 having a diameter smaller than that of the threaded portion 2 and tightened by the nut 10. This method of use is the same as the conventional method, but the guide rod 5 made of synthetic resin is integrally projected on the connecting rod 3 having the annular groove 4 by the insert molding method, so that it is passed through the mounting hole of the mounting plate 9. It does not peel even if it is sometimes touched or twisted. Moreover, the length of the connecting rod 3 can be easily shaped according to the method of use, and the spherical surface 6 can be easily shaped.

Further, since the tip end of the synthetic resin guide rod 5 is a spherical surface 6, it is excellent in the hole scooping property at the initial stage of mounting,
Smooth insertion is possible without damaging the mounting plate 9.
Further, since the guide rod 5 has a smaller diameter than the threaded portion 2, the nut 10 can be passed through without trouble. Moreover, there is an advantage that the guide rod 5 having a required length can be manufactured at low cost by the insert molding method.

[0011]

As described above, since the guide rod bolt of the present invention can be smoothly mounted without the risk of the guide rod made of synthetic resin peeling off, it is a drawback of the conventional product. As a solution to the above, it is of high value.

[Brief description of the drawings]

FIG. 1 is a view showing a bolt with a guide rod of the present invention,
(A) is a sectional view and (B) is a right side view.

FIG. 2 is a sectional view showing a use state.

FIG. 3 is a side view showing a conventional bolt with a guide rod.

FIG. 4 is a sectional view showing a use state.

[Explanation of symbols]

 1 non-circular plate-shaped head 2 screw part 3 connecting rod 4 annular groove 5 synthetic resin guide rod 6 spherical surface 7 exterior component 8 mounting part 9 mounting plate 10 nut 21 conventional plate-shaped head part 22 screw part 23 Guide rod 24 Vinyl chloride coating 25 Synthetic resin cap 26 Exterior parts 27 Mounting part 28 Mounting plate 29 Nut

Claims (1)

[Claims] 1. A connecting rod, which has a diameter smaller than that of the threaded portion and is provided with an annular groove in the middle thereof, is formed by rolling at the tip of the threaded portion having a non-circular plate-shaped head, and the outer periphery of the connecting rod. A guide rod bolt characterized in that a guide rod made of synthetic resin having a smaller diameter than the threaded portion is provided by insert molding, and the tip of the guide rod is spherical.