JPH09137819A - Temporary fastening device for bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify structure, to reduce the number of parts, and besides to improve workability by a method wherein an inclination part is formed at one side end in the direction of a lateral width of an engaging piece to prevent the a bolt from being locked and a stopper piece extending in the rotation direction of a nut is arranged at the other side end. SOLUTION: The hexagonal head part of a bolt 1 and a temporary lock member 2 are integrally fixed through caulking. The temporary lock member 2 is extended in a tapered-off shape in the direction of the diameter of the bolt 1 and an engaging piece 3 having a tip part bent axially of the bolt 1 is formed. The direction of the lateral width of the engaging piece 3 is formed in the tangential line direction of the rotation radius of the bolt 1. An inclination part 4 extending obliquely downward in a straight line from one side end to a lower end is formed at the engaging piece 3 and a stopper piece 5 extending from the other side end in the rotation direction of a nut 8 is arranged. This constitution prevents the occurrence of slip off of the bolt and also improves assembly workability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolt temporary fixing structure, and more particularly to a bolt temporary fixing device for fastening a member formed of a plate member to another member with a bolt.

[0002]

2. Description of the Related Art For example, when attaching a subframe to a side member of a vehicle body having a hollow plate member, the subframe is applied to the side member from below and bolts are inserted into holes passing through the side member and the subframe from above. The nut is screwed in from the bottom and it is attached. In this case, as shown in FIGS. 5 (a) and 5 (b), a temporary fixing piece 52 serving as a diametrically extending detent is fixed to the head of the bolt 51 as a means for temporarily fixing the bolt. , The attachment hole 53 of the attachment member 53 or the member 55 that adheres to the member 55 at its tip
The one provided with the engaging piece 54 for engaging with 6 is used. Further, as one having a function of preventing the bolt from rotating and preventing the bolt from coming off, as shown in FIG. 6, there is one in which a set bolt 63 for fixing the temporary fixing piece 62 to a member is provided at the tip of the temporary fixing piece 62. . As another example of this, the one disclosed in Japanese Utility Model Laid-Open No. 57-33313 is known.

[0003]

However, in the case where the attachment 53 is provided, it is necessary to form the distance from the bolt 51 to the attachment 53 according to the distance to the member 55 that abuts on the attachment 53. There is a problem that the setting place of 51 is limited. Further, there is a problem that the number of types of the temporary fastening pieces 52 increases every time the set position is different. Further, in the case where the engagement piece 54 is provided, if the bolt 51 is pushed up during the work of attaching the sub-frame or tightening the nut, the engagement piece 54 will come out of the engagement hole 56 of the member and the work of re-inserting it will be extra. There may be a problem with the car or a problem that the member may be pulled out and tightened while riding on the member.
Further, although the one fixed by the set bolt 63 can surely prevent the rotation and the disengagement, it has a problem that the number of parts is large and the assembling workability is poor and the cost is high.
In view of such conventional problems, the present invention provides a temporary fixing device for a bolt, which has a simple structure, a small number of parts, and good workability and is inexpensive.

[0004]

According to the present invention, a bolt is passed through a stationary member, a nut is screwed into the stationary member, and a temporary fixing member extending in the diametrical direction of the bolt is engaged with the stationary member. , The engaging piece bent in the axial direction of the bolt is formed at the tip of the temporary fixing member, and when this engaging piece is inserted into the engaging hole of the stationary member, the nut rotates while contacting the edge of the hole. In addition to the inclined portion for moving in the direction, a stopper piece for preventing the slip-out is provided, and this stopper piece extends in the rotation direction of the nut.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below based on an example. FIG. 1 is a perspective view of a bolt provided with a temporary fixing member according to an embodiment of the present invention, FIG. 2 is a top view of a bolt mounting state according to an embodiment of the present invention, and FIG.
FIG. 4 is a cross-sectional view taken along line AA of FIG. 4, and FIG. 4 is a situation explanatory view showing a state in which the engagement piece of the present invention is inserted into the engagement hole. In the figure, reference numeral 1
Is a bolt, 2 is a temporary fixing member, 3 is an engaging piece, 4 is an inclined portion,
Reference numeral 5 is a stopper piece, 6 is a side member, and 7 is an engaging hole. The side member 6 corresponding to the stationary member is made of a plate material and has a U-shaped cross section, and mounting holes for the bolts 1 are provided in both of the facing plate materials. Further, the upper plate member to which the bolt 1 is crimped is provided with an elongated hole-like engaging hole 7 apart from the mounting hole so that the longitudinal direction thereof is aligned with the tightening direction of the nut 8, and the temporary fixing member 2 is provided therein. Is inset.

The bolt 1 has an ordinary hexagonal head, and a temporary fixing member 2 is combined thereunder, and these head and the temporary fixing member 2 are integrally fixed by caulking. The temporary fixing member 2 is extended in a taper shape in the diameter direction of the bolt 1, and an engaging piece 3 having a tip end portion bent in the axial direction of the bolt 1 is formed. The lateral width direction of the engaging piece 3 is formed tangential to the turning radius of the bolt 1. The engaging piece 3 is provided with an inclined portion 4 which extends straight obliquely downward from one side end to the lower end thereof, and is provided with a stopper piece 5 extending from the other side end in the rotation direction of the nut 8. Has been. When the bolt 1 is inserted into the mounting hole, the inclined portion 4 is inserted while contacting the edge of the engaging hole 7, and guides and engages the engaging piece 3 in the rotation direction of tightening the nut 8. The stopper piece 5 serves to prevent the bolt 1 from coming off.

The lateral width L1 of the engaging piece 3 is smaller than the hole diameter L2 in the longitudinal direction of the engaging hole 7, but the stopper piece 5 is formed.
Is formed so as to project from the side end of the engagement piece 3 by L3, so that the lateral width L4 of the engagement piece 3 and the stopper piece 5 together is formed larger than the hole diameter L2. Explaining the insertion state here with reference to FIG. 4, when the engagement piece 3 is inserted into the engagement hole 7, the inclined portion 4 is pushed in the insertion direction while being in contact with the edge of the hole 7. After passing through the position P1 indicated by the dotted line and the position P2 indicated by the dotted line, the hole 7 is inserted into the position P3 indicated by the solid line without interference. This position P3 corresponds to the mounting position of the bolt 1 in FIG.

Therefore, according to this structure, the lateral width L4 of the engaging piece 3 and the stopper piece 5 is larger than the hole diameter L2 of the engaging hole 7, so that the bolt inserted into the side member 6 is formed. Subframe 9 mounting holes 1
Even when the sub frame 9 pushes up the bolt 1 when passing 0, the stopper piece 5 hits the side member 6 to stop the bolt 1 and the engaging piece 3 does not come out of the engaging hole 7. Also, when tightening with the nut 8 from below,
Even if an upward force is applied to the bolt 1 and a torque is applied in the tightening rotation direction, the stopper piece 5 abuts against the side member 6, and the end of the engagement piece 3 has an engagement hole 7
As a result of contacting the edge of the bolt 1, the bolt 1 works to prevent the bolt 1 from coming off or co-rotating.

In this embodiment, the head of the bolt is hexagonal, but the shape is not limited to this.
It may be round. Further, although the engaging hole is described as a long hole, it is needless to say that it is not limited to this shape and may be round. Furthermore, although the temporary fixing member is described as being caulked to the bolt, it may be welded, and even if it is not fixed integrally, it does not rotate or come out between the bolt and the temporary fixing member. Anything that fits together can be used. Further, the temporary fixing device for the bolt of the present invention has been described as an example in which the space member is tightened by sandwiching the space member like the connection between the side member and the sub-frame, but the present invention is not limited to this, and the connection between flat plates can also be established. Needless to say.

[0010]

According to the present invention, the following effects can be obtained. That is, since the inclined portion is formed at one side end in the lateral width direction of the engagement piece that prevents the rotation of the bolt and the stopper piece extending in the rotation direction of the nut is provided at the other side end, the engagement piece is formed. Can be inserted along the edge of the hole, but if the inserted bolt is accidentally pressed during assembly, the stopper piece will hit the stationary member and the engaging piece will not engage. You can prevent it from coming out of the dowel. As a result, it is possible to prevent the bolt from coming off, eliminating the need for re-inserting the previously removed bolt again, and eliminating the problem of tightening the missing engaging piece while it is still riding on the member, which can improve the assembly workability. The effect is obtained. Further, since the inclined portion and the stopper piece are only integrally provided on the engaging piece, other additional parts and the like are unnecessary, and there is no restriction on the place of attachment, so that the engaging piece can be provided at a desired place at low cost. There are advantages.

[Brief description of the drawings]

FIG. 1 is a perspective view of a bolt provided with a temporary fixing member according to an embodiment of the present invention.

FIG. 2 is a top view showing a state in which a bolt according to an embodiment of the present invention is attached.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a situation explanatory view showing an insertion state of the engagement piece of the embodiment according to the present invention into the engagement hole.

FIG. 5 is a conventional example.

FIG. 6 is another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bolt 2 Temporary fixing member 3 Engagement piece 4 Inclined part 5 Stopper piece 6 Stationary member 7 Engagement hole 8 Nut

Claims (1)

[Claims] 1. A type in which a bolt is passed through a stationary member, a nut is screwed into the stationary member, and a temporary fixing member extending in a diametrical direction of the bolt is engaged with the stationary member, the distal end portion of the temporary fixing member being provided. An engaging piece bent in the axial direction of the bolt is formed, and when this engaging piece is inserted into the engaging hole of the stationary member, an inclination for moving in the rotational direction of the nut while contacting the edge of the hole The provisional fastening device for the bolt is characterized in that a stopper piece is provided for preventing the slip-out, and the stopper piece extends in the rotation direction of the nut.