JPH0783213A - Fastening tool - Google Patents

Abstract

PURPOSE:To facilitate a connecting work and also to secure strength of a connecting part when a member is clamped and connected while keeping the distance between the members. CONSTITUTION:In a fastening tool composed of a weld bolt 5, a nut 9, and a collor 7 interposed between a bracket 1 to be clamped and connected by the bolt 5 and the nut 9 and an acceleration pedal retainer 3, and for keeping the distance between both members 1, 3, a shaft part 5a having the diameter smaller than the inside diameter of an internal thread part 7a to be screwed in the external thread part is provided between the external thread part and a head part of the bolt 5, and the internal thread part 7a to be loosely fitted in the shaft part 5a of the bolt 5, and capable of being screwed to the external thread part and a hole part 7b to be loosely fitted to the external thread part when the internal thread part 7a is loosely fitted to the shaft part 5a are provided on the shaft center part of the collar 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener for fastening and connecting members with a space therebetween.

[0002]

2. Description of the Related Art For example, an accelerator pedal retainer mounting portion at the front of a driver's seat of a vehicle is taken as an example of a fastener for fastening and coupling members with each other. The one having the structure of the formula is known (as a conventional technique of this kind, there is a utility model of Sho 61-169744).
Some are disclosed in the official gazette).

In this case, the bracket 51, which is a vehicle body member to which the accelerator pedal retainer 3 is mounted, has a retainer mounting portion 51a formed by press molding on the vehicle compartment side (bracket 5).
It is formed so as to project to the upper side of 1). The reason why the retainer mounting portion 51a is projected is that the dash insulator 11 for sound insulation is attached to the surface 51b of the bracket 51 on the vehicle compartment side, and the retainer 3 is attached to the dash insulator 11 for sound insulation. The retainer mounting portion 51a is formed in the shape shown in the figure because the retainer mounting portion 51a cannot be squeezed into a convex shape at a right angle in molding, and the corners and corners must be set to have large radii. Three
A hole 11a is provided for mounting. Thus, retainer 3
The bolts 55,
The retainer 3 is fastened and coupled to the bracket 51 by the nut 9. The lower side of the bracket 51 in FIG. 2 is the engine room.

[0004]

However, if the hole 11a is displaced with respect to the retainer mounting portion 51a when the insulator 11 is attached, the hole 11a of the insulator 11 when mounting the retainer 3 as shown by the broken line in FIG. There is a possibility that a part of the retainer 3 will be bitten and the retainer 3 will not be attached properly. The hole 11 is provided to prevent this bite.
When a is increased, the sound of the engine room leaks into the passenger compartment as indicated by arrow A from the gap between the hole 11a and the retainer 3.
Sound insulation performance deteriorates.

Therefore, as shown in FIG. 3, the bracket 6
The retainer 3 mounting part of 1 is a flat plate, and the pipe-shaped collar 6
Although it is conceivable that the bolts 65 and the nuts 9 are used to fasten and connect them with each other, the collar 67 is previously sub-assembled to the bolts 65 when the bracket 61 and the retainer 3 are in the opposite vertical relationship to that shown in FIG. Since it is not possible to keep it, it is necessary to attach it while holding the collar 67, and the workability of connecting the retainer 3 is poor.

Therefore, as a countermeasure, as shown in FIG. 4, a structure in which a nut 77 is screwed in instead of the pipe-shaped collar 67 can be considered. In this case, the nut 77 can be sub-assembled in advance, but if the nut 77 is insufficiently tightened or loosened, for example, the mounting surface of the retainer 3 does not have the same height as shown in FIG. Since a retainer 3 has a mounting error, it is necessary to strictly control the tightening torque of the nut 77.

Therefore, as another countermeasure, the structure shown in FIG. 6 can be considered. In this case, the bracket 61 remains a flat plate, and the stepped weld bolt 85 also serving as a collar is attached to the bracket 61.
Welded at 5a. In this way, the retainer 3 is stepped 85
The nut 9 is tightened by bringing it into contact with b. With this configuration, the insulator 11 is not caught when the retainer 3 is attached, and the retainer 3 and the surface of the insulator 11 are in close contact with each other, so that the sound insulation performance is good. However, in this configuration, since the pedal-side external force received through the retainer 3 is transmitted to the bracket 61 only through the welded portion 85a,
When the welded portion 85a has a poor welding, there is a concern about the strength of the welded portion 85a peeling off.

The present invention has been made by paying attention to such a problem, and when the members are fastened and joined with a space kept between them, the joining work is easy and the strength of the joining portion can be secured. The purpose is to provide fasteners.

[0009]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a collar provided between a bolt and a nut and a member that is fastened and coupled by the bolt and the nut to keep a distance between the members. In the fastener consisting of, between the male screw portion and the head portion of the bolt, a shaft portion having a diameter smaller than the inner diameter of the female screw portion screwed to the male screw portion is provided, and at the shaft center portion of the collar, A female screw portion that is loosely fitted to the shaft portion of the bolt and that can be screwed into the male screw portion, and a hole portion that is loosely fitted to the male screw portion when the female screw portion is loosely fitted to the shaft portion are provided. Is characterized by.

[0010]

According to the present invention, first, the collar is screwed into the bolt passing through one of the members to be fastened until the screwing is completed, and the collar is sub-assembled to the bolt. Then, the upper and lower end surfaces of the collar are brought into contact with the joining members, and both members are fastened and joined together by bolts and nuts. In this way, since the color can be sub-assembled, the workability of the coupling is good. Further, the force transmission between the members is transmitted through both end faces of the collar that is in contact with both members,
The strength of the joint can be secured.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG.
This embodiment is an example applied to the accelerator pedal retainer mounting portion in the front portion of the driver's seat of the vehicle, like the conventional example.
Therefore, the same components as those of the conventional example are designated by the same reference numerals, and the duplicate description will be omitted.

First, the structure will be described.

FIG. 1 is a sectional view showing a state in which an accelerator pedal retainer 3 is fastened and coupled to a bracket 1 which is a vehicle body member. In FIG. 1, the lower side of the bracket 1 is an engine room and the upper side is a vehicle compartment.

The collar 7 has an outer shape similar to that of a hexagonal nut, a female screw portion 7a is formed in a lower shaft center portion within a predetermined height k, and an upper portion is coaxial with the female screw portion 7a. A hole 7b having a diameter larger than the root diameter is formed.

On the other hand, the weld bolt 5 is welded to the bracket 1 at a portion 5b, and as shown in the drawing, a male screw portion is formed at the tip portion, and the height k of the female screw portion 7a of the collar 7 is formed at the lower portion of the seat surface. In a range h longer than a predetermined distance, coaxial with the male thread,
A shaft portion 5a having a diameter smaller than the inner diameter of the female screw portion 7a is formed.

The bracket 1 is provided with a nut 9 for fastening and connecting the retainer 3 with a gap corresponding to the height of the collar 7, and the collar 7, the weld bolt 5, and the nut 9 constitute a fastening tool.

Next, the connecting operation and action will be described with reference to FIG.

First, the collar 7 is screwed into the weld bolt 5 with the female screw portion 7a first, until the screwing is completed. After the screwing is completed, the collar 7 and the weld bolt 5 are loosely fitted to the female screw portion 7a of the collar 7 and the shaft portion 5a of the weld bolt 5, and the collar 7 is seated on the bracket 1. In this way, the collar 7 is sub-assembled to the bracket 1.
Then, the upper and lower end surfaces of the collar 7 are respectively attached to the retainer 3,
The bracket 3 is brought into contact with the bracket 1, and the retainer 3 is fastened and coupled to the bracket 1 by the nut 9. At this time, the retainer 3 is in close contact with the surface of the insulator 11, and a space d is secured between the bracket 1 and the retainer 3.

Due to such coupling, the operation is different from the above-mentioned conventional example (FIG. 2) of the direct retainer mounting type.
Even if the position of the hole 11a is deviated when the insulator 11 is attached, there is no risk of the insulator 11 being caught when the retainer 3 is connected. Therefore, since it is not necessary to make the hole 11a large, the sound insulation performance is good.

Further, unlike the conventional example (FIG. 3) using the pipe-shaped collar 67, the collar 7 is sub-assembled even when the vertical relationship between the bracket 1 and the retainer 3 is opposite to that in FIG. The workability of joining is good because it can be set.
That is, since the collar 7 is once screwed into the weld bolt 5, the collar 7 does not drop before the nut 9 is fastened.

Further, unlike the above-described conventional example (FIGS. 4 and 5) in which the nut 77 is used in place of the collar 7, insufficient tightening or loosening of the collar 7 does not occur, so that the tightening torque control of the collar 7 is unnecessary and the retainer is not required. There is no mounting error in 3.

Further, unlike the conventional example (FIG. 6) using the stepped weld bolt 85 which also serves as the collar, the collar 7 is used.
Since the upper and lower end surfaces of the retainer 3 and the bracket 1 contact the retainer 3 and the bracket 1, respectively, and are fastened by the nut 9, the force transmission between the retainer 3 and the bracket 1 is performed at the welded portion (5b portion) between the weld bolt 5 and the bracket 1. In addition to the above), it is transmitted not only through the abutment portion of the collar 7, but there is no fear of strength.

Further, once the collar 7 is screwed into the weld bolt 5, the coating film of electrodeposition coating applied to the threaded portion of the weld bolt 5 falls off, and the nut 9 can be tightened more reliably.

[0024]

As is apparent from the above description, according to the present invention, when the members are fastened and joined with a space maintained between them, the joining work is easy and the strength of the joining portion can be secured.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a conventional retainer direct mounting type example.

FIG. 3 is a sectional view showing a conventional example using a pipe-shaped collar.

FIG. 4 is a cross-sectional view showing a conventional example using a nut as a collar.

FIG. 5 is an explanatory diagram of a conventional example using a nut as a collar.

FIG. 6 is a cross-sectional view showing a conventional example using a stepped weld bolt that also serves as a collar.

[Explanation of symbols]

 1 Bracket 3 Accelerator Pedal Retainer 5 Weld Bolt 5a Shaft 7 Collar 7a Female Thread 7b Hole 9 Nut 11 Dash Insulator

Claims (1)

[Claims] 1. A fastener comprising a bolt and a nut, and a collar interposed between members to be fastened and coupled by the bolt and the nut, and maintaining a gap between both members. A male screw portion and a head portion of the bolt. A shaft portion having a diameter smaller than the inner diameter of the female thread portion to be screwed into the male thread portion is provided, and the shaft portion of the collar is loosely fitted to the shaft portion of the bolt and screwed to the male thread portion. A fastener which is provided with a matable female screw portion and a hole portion which is loosely fitted to the male screw portion when the female screw portion is loosely fitted to the shaft portion.