JPS63280906A - Clamping structure of automobile part, etc. - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is directed to attaching parts such as resin bumpers, window moldings, fender covers, radiator grills, etc. used as exterior parts of automobiles etc. to the main body of a car body etc. This is related to fastening structures.

(Prior Art) As shown in FIG. 10, this type of fastening structure has fasteners installed in a horizontally long fitting groove 103 that is open on one side and is provided on a mounting plate 102 that is integrally formed with an exterior component 101. The clip portion 104 is press-fitted into the threaded shaft portion 1 of the fastener.
A temporarily assembled unit is prepared by inserting a rubber ring-shaped sealing material 105 into 11, and after fitting this into the mounting hole of the main body 106, a nut 107 is screwed to tighten the unit. It is something.

A conventional fastener 10 used in the above fastening structure
4, for example, those shown in FIGS. 11 and 12. This fastener 104 includes a rectangular head 108 for preventing rotation, a washer 109 provided at a predetermined distance from the head 108, and a washer 109 provided between the head 108 and the washer 109. The small-diameter shaft portion 110 press-fitted into the fitting groove 103 constitutes a clip portion, and the distal end side of the screw shaft portion 111 whose base side is embedded in the clip portion projects from the washer portion 109 . In the fastener 104 having the above configuration, the clip portion is injection molded from a resin material, and at this time, the base side of the threaded shaft portion 111, which is previously manufactured from a metal material, is cast into the clip portion and integrated.

(Problems to be Solved by the Invention) However, the conventional fastening structure described above has the following problems.

■Molds for injection molding machines are becoming more complex, and the design and mold manufacturing costs are high, resulting in higher product prices.

■During molding, the resin material may flow to the tip of the screw shaft and crush the threads, or the screw shaft may shift from the center of the holding part, making it difficult to obtain products of stable quality. There are problems with quality and productivity, such as difficulty in

■Depending on the fastening location, different types of fasteners are required, with different lengths between the parts and the main body and the length of the screw shaft. This will lead to a decrease in performance and an increase in costs, and if it is dared to be shared, extra parts such as intervening spacers for length adjustment will be required and the number of man-hours will increase.

■Management and transportation costs increase as the screws go through different industries, from the screw manufacturer to the resin processing company to the assembler.

■In order to prevent rainwater from penetrating through the fasteners and causing rust, a disc-shaped sealing material made of rubber or other material was made separately and placed between the fasteners and the main body. However, there were drawbacks such as an increase in the number of parts and assembly man-hours, and the possibility of falling off after assembly.

(Means for Solving the Problem) In order to attach a component to the main body, one clip portion is fitted into a mounting plate provided on the component, and the other threaded portion is fitted into a mounting hole provided on the main body. a fastener penetrated through the
In a fastening structure for automobile parts, etc., comprising a sealing material interposed between the fastener and the main body, and a nut screwed into a threaded portion penetrated through a mounting hole of the main body, the clip portion of the fastener consists of a clip head that is attached to the inside of a mounting plate of a component, a small diameter shaft that is integrally connected to the clip head and is press-fitted into a fitting groove drilled in the mounting plate, and the small diameter shaft. connected to and attached to the outside of the mounting plate of the component, working together with the clip part to clamp the mounting plate, and tightening against the mounting surface of the main body with a washer part forming the seat surface;
The washer part is formed with a skirt part that is pressed against the mounting surface of the main body in a watertight state, the clip part is integrally molded with a resin material, and a screw holding hole is bored in the clip part, The threaded portion of the fastener includes a screw head that is inserted into and attached to the screw holding hole of the clip portion, and a screw shaft that passes through the screw holding hole and projects toward the mounting hole of the main body. The threaded part is integrally molded from a metal material, and is a fastening structure for automobile parts, etc., in which the threaded part is formed separately from the clip part and then integrally assembled.

(Example) An example of the present invention will be described below based on the drawings. As shown in FIG. 1, the fastening structure according to the present invention has a body made of a steel plate like the conventional example described above.

A bumper for the main body 1 such as fenders and doors.

Exterior parts 2 such as sashes and moldings are fixed using fastening members such as fasteners 3 and nuts 9 having external threads. The fastener 3 includes a clip portion 7 that is fitted into a horizontally long fitting groove 5 that is open at one end, which is formed in a mounting plate 4 that is integrally molded with the component 2 from a resin material, and a clip portion 7 that is fitted into a horizontally long fitting groove 5 that is open at one end. It is constituted by a metal screw portion 8 that is held.

The threaded portion 8 includes a forged screw head 10 that is engaged within the clip portion 7, and a nut 9 that protrudes from the clip portion 7 to the outside and is passed through the attachment hole 11 of the main body 1 so that the nut 9 is screwed therein. The screw shaft portion 12 is formed integrally with a metal material. Incidentally, a small-diameter protruding portion 12a is formed at the tip of the screw shaft portion 12 in order to facilitate fitting into the mounting hole 11.

The clip portion 7 has a clip head portion 18, a washer portion 19, and a small diameter shaft portion 20, and is integrally molded from a resin material. The clip head 8 is mounted on the inside of the mounting plate 4, and is formed in, for example, a rectangular shape so as to have a rotation preventing function with respect to the mounting plate 4 after being mounted. The washer portion 19 is attached to the outside of the mounting plate 4, and forms a disk-shaped seat surface 16 that receives the tightening of the main body 1. The small-diameter shaft portion 20 integrally connects the clip head 18 and washer portion 19 that sandwich the mounting plate 4, and is press-fitted laterally into a fitting groove 5 drilled in the mounting plate 4, so that the clip The part 7 is held by the component 2.

The washer 19 has a double concentric skirt portion 6 formed on the outer peripheral edge of the seat surface 16 and protruding from the seat surface 16 toward the mounting surface 17 of the main body 1 in a folded manner. The skirt portion 6 is thin and has appropriate elasticity, and when the nut 9 is tightened during fastening and the seat surface 16 is brought into close contact with the mounting surface 17, the skirt portion 6 is While expanding in a trumpet shape, they press against each other in a watertight manner like a suction cup to prevent rainwater etc. from entering through the screw shaft portion 12.

The skirt portion 6 may have three or more pleats, or may have three or more pleats, or may be deformed into other shapes that function similarly.

Further, a screw holding hole into which the screw portion 8 is mounted is bored in the clip portion 7, and the screw holding hole has a through hole 13 through which the screw shaft portion 12 passes, and a screw head 10 is accommodated therein. The shoulder portion 14 is formed between the through hole 13 and the enlarged diameter portion 15 and locks the screw head 10.

The above-mentioned clip portion 7 made of a resin material and threaded portion 8 made of a metal material are manufactured separately, and prior to the fastening shown in FIG. 1, they are assembled together as shown in FIG. 6 to form the fastener 3. Configure. Note that when tightening the nut 9, the clip portion 7 and the threaded portion 8 may rotate relative to each other, or the nut 9 may be tightened by tightening the nut 9 so that it is wider than the outer diameter of the screw head 10 as a holding means to prevent the threaded portion 8 from falling off from the clip portion 7. By reducing the inner diameter of the diameter portion 15 and press-fitting it,
As shown in FIG. 7, the opening edge of the enlarged diameter part 15 is heated to fix the screw head 10 by the welded part 21, or the outer diameter of the screw head 10 or the inner diameter of the enlarged diameter part 15 is fixed as shown in FIG. Measures are taken, such as providing serrations 22 on either one of them and press-fitting the other one into the serrations 22.

Furthermore, as shown in FIG. 9 for the threaded portion 8, a parallel thread 23 with no lead angle is pulled 31c onto the threaded shank 12 adjacent to the screw head 10, so that a parallel thread 23 is threaded along the threaded shank 12. It cooperates with the skirt portion 6 to prevent water from entering the inside.

(Effects of the Invention) According to the present invention, since the fastener has a structure in which the clip portion made of resin material and the threaded portion made of metal material are manufactured separately and then combined, mold design and Manufacturing costs are significantly reduced, resulting in lower product costs, and there is no possibility of resin phase leaking into the threaded part or misalignment of the axis, and the combination of clip part and threaded part is suitable for various fastening points. A good fastening structure can be obtained since it is possible to selectively use the fastening structure. In particular, by integrally forming the waterproof skirt part on the seat surface side of the washer part, there is no need to attach a special sealing material, and assembly is easy, thereby reducing manufacturing costs.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a fastening structure according to an embodiment of the present invention, FIG. 2 is a left side view of a clip part in the same fastening structure, and FIG.
The figures are a front view of the same, FIG. 4 is a right side view of the same, FIG. 5 is an enlarged sectional view of the same essential parts, FIG. 6 is a front view of the fastener without the main parts of the fastening structure of the present invention, and FIG. 7 and Fig. 8 is a side view showing the holding means between the clip part and the threaded part in the same fastener, Fig. 9 is a front view of the threaded part with waterproofing means, and Fig. 10 is a longitudinal section of the conventional fastening structure. 11 is a front view of a fastener in the same fastening structure, and FIG. 12 is a left side view of the same. [Explanation of symbols] 1... Main body 2... Parts 3... Fasteners 4... Mounting plate 5... Fitting groove
6...Skirt part 7...Clip part 8
...Thread part 9...Nut 10...Screw head 11...Mounting hole 12...Screw shaft part 13...Through hole 14...Shoulder part 15...
Expanded diameter part 16... Seat surface 17... Mounting surface 18... Clip head 19... Washer part 20...
・Small diameter shaft part 21... Welded part 22... Serration 23... Parallel thread Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6? Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] In order to attach a component to the main body, one clip part is fitted into a mounting plate provided on the component, and the other threaded part is passed through a mounting hole provided in the main body. A fastening structure for automobile parts, etc., comprising a fastener, a sealing material interposed between the fastener and the main body, and a nut threaded into a threaded portion penetrated through a mounting hole of the main body, comprising: The clip portion includes a clip head that is attached to the inside of the mounting plate of the component, a small diameter shaft portion that is integrally connected to the clip head and is press-fitted into a fitting groove drilled in the mounting plate, and a washer part that is connected to the small diameter shaft part, is attached to the outside of the mounting plate of the component, and cooperates with the clip part to clamp the mounting plate and forms a tightening seat surface for the mounting surface of the main body,
The washer part is formed with a skirt part that is pressed against the mounting surface of the main body in a watertight state, the clip part is integrally molded with a resin material, and a screw holding hole is bored in the clip part, The threaded portion of the fastener includes a screw head that is inserted into and engaged with the screw holding hole of the clip portion, and a screw shaft portion that penetrates the screw holding hole and projects toward the mounting hole of the main body. A fastening structure for automobile parts, etc., characterized in that the threaded portion is integrally molded from a metal material, and is formed separately from the clip portion and then integrally assembled.