JPH0369810A - Temporary bolt fixing device - Google Patents

Abstract

PURPOSE:To facilitate the use of nut runner in a narrow space and improve work efficiency by mounting a temporary bolt fixing member in a bolt insertion hole which is one of the members to be joined separately or forming it integrally. CONSTITUTION:A temporary fixing member 5A which forms a female screw 7 which engages which a male screw of bolt on the inner peripheral face of a ring having a cut section 6 as temporary fixing position is fixed into a bolt insertion hole 8 of a member 3 to be joined. A bolt is screwed in the temporary fixing member 5A by a nut runner and is further screwed in to match with the second member to be joined in order to tighten both members. Accordingly, the bolt can be fixed temporarily in previous process, thus eliminating a necessity of bolt supply device for the nut runner and improving work efficiency in a narrow space by using the nut runner.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a bolt temporary fixing device. The present invention relates to a temporary fixing device for temporarily fixing a bolt to one member to be joined.

[Conventional technology]

2. Description of the Related Art When components of a mechanical device are joined together using a bolt tightening method, for example, when an engine is mounted in the engine room of an automobile, an automatic nut runner is used as a bolt/nut tightening device. As shown in Fig. 6, the automatic nut runner uses a means such as pneumatic conveyance to move the bolts (2) that are sent out to the lower end of the nut runner body (1).
> by rotating with a predetermined tightening torque, the first member to be welded (3) and the second member to be welded (4) are joined into an integral structure.

[Problem to be solved by the invention]

By using an automatic nut runner with an automatic bolt feeder it is possible to carry out the screw tightening operation in an automatic manner, but when the mechanical device is complex and compact, it is necessary to provide sufficient space around the parts to be joined. It may be difficult to secure enough space to operate the automatic nut runner. Under such circumstances, the automatic supply of bolts is restricted, so the worker manually supplies the bolts to one of the parts to be joined, and then rotates the bolts with a small nut runner to join two or more parts. The parts must be joined. This has the disadvantage that work efficiency is significantly reduced, and a solution to this problem has been desired.

[Means to solve the problem]

As a means for solving the above problems, the present invention provides temporary bolt fixing in which a bolt temporary fixing member is attached separately or integrally formed in a bolt insertion hole of one of a plurality of members to be fastened and joined by bolts. It provides equipment.

[Effect]

Prior to tightening with the nut runner, the bolt is temporarily fixed on one of the parts to be joined on the mechanical device using a temporary fixing member made of tensile expansion, adhesive, press-fitting, or burred holes in a pre-process. This allows the screw tightening work to be carried out smoothly even when the installation space is narrow.

[Embodiment 1] FIG. 1A is a longitudinal sectional view of a temporary fixing member showing a first specific example of the present invention, and FIG. 1B is a plan view thereof. The temporary fixing member (5A) in this example is formed of a metal or synthetic resin ring having a cutout (6) 4 at a portion τ of the peripheral wall surface, and a temporary fixing member (5A) is provided on the inner circumferential surface of the ring. Bolts (2
) is formed with a female thread (7) that engages with the male thread.

The temporary fixing member (50) is fixed in the bolt insertion hole (8) drilled in the member to be joined (3) using its elastic expansion force.

FIG. 1C shows a modification of the temporary fixing member (5A), in which three temporary fixing members (5B) (5B) (5B) are arranged at approximately equal intervals along the circumferential direction of the bolt insertion hole (8). Form a temporary fixing means for the bolt (2) by adhering it to the
There is ζ. Bolt (2) via activation of nut runner (1)
) is rotated to join the two members to be joined into an integral structure, but the temporary fixing member (5A) or (5B) temporarily fixed on the first member to be welded (3) (5
B) (5B) is caused by the screwing of the male thread (2A) of the bolt (2) with the female thread (4A) of the second member to be joined (4), as shown in Figures 3 to 5. The bolt is pulled out from the bolt insertion hole (8) and falls into the circular storage pocket (9) formed on the upper side of the second member to be welded (4). The diameter and depth of the storage pocket (9) are appropriately selected depending on the dimensions of the temporary fixing member (5A) or (5B) (5B) (5B).

[Embodiment 2] FIGS. 2 and 3 are longitudinal sectional views of a temporary fixing member showing a second specific example of the present invention. The temporary fixing member (5C) in this specific example is molded from synthetic resin, and is temporarily fixed by press fitting into the bolt insertion hole (8) of the first member to be joined (3). In the following description, since the procedure for dropping the temporary fixing member (5) into the storage pocket (9) during bolt tightening is the same as in Example 1, the explanation of the duplicated items will be omitted. A small diameter collapsible flange (10) is provided at the upper and lower ends of the outer peripheral side wall of the temporary fixing member (5C) as an auxiliary means for press-fitting and locking.

[Embodiment 3] FIG. 4 is a longitudinal sectional view of a temporary fixing member showing a third specific example of the present invention. In this specific example, a capsule containing a liquid adhesive component is placed on the inner peripheral surface of the bolt insertion hole (8) drilled in the first member to be joined (3) or on the outer peripheral surface of the tip of the bolt (2). A temporary fixing means for the bolt (2) is constituted by applying a particulate adhesive (50) consisting of the following.

When the bolt (2) is tightened, the capsule ruptures and the liquid adhesive component oozes out, providing a temporary fixing function to the bolt (2).

In the specific example shown in FIG. 4, a storage pocket (9) for adhesive (5D) is provided above the second member to be joined (4), but the particulate adhesive (5D) is in a small amount. Therefore, the formation of the storage pocket (9) can also be omitted.

[Embodiment 4] FIG. 5 is a longitudinal sectional view of a temporary fixing member showing a fourth specific example of the present invention. Figure 5 shows a case where, for example, an outer panel (3) made of thin sheet metal that constitutes the body of an automobile is fastened to an inner panel (4) made of thick resin with bolts (2). Therefore, when forming the bolt insertion hole of the outer panel (3) with a press or the like, a barring hole (5E) is formed in advance, and a barring hole (5E) is formed at the stage of temporarily tightening the bolt (2). ) at the tip of the bolt (
2) and temporarily secure it. In this specific example, in order to eliminate interference between the previous bolt (2) and the inner panel (4), tightening is performed on the upper side of the inner panel (4) below the screwing direction of the bolt (2). It is desirable to form a counterbore portion (12).

[Effects of the Invention] According to the present invention, the bolt is temporarily fixed in the bolt insertion hole of one of the plurality of members to be fastened and joined by the bolt with a temporary fixing member in a pre-process etc. This eliminates the need to equip the nut runner with a bolt feeding device, allowing the nut runner to perform automatic screw tightening work smoothly without any problems when the bolt spacing is small or in a narrow space, improving work efficiency. be able to.

[Brief explanation of drawings]

FIG. 1A is a longitudinal sectional view of a temporary fixing member showing a first example of the present invention, and FIG. 1B is a plan view of the base. FIG. 1C is a plan view showing a modified example of the temporary fixing member (5A), and FIGS. 2 and 3 are longitudinal sectional views of the temporary fixing member showing a second specific example of the present invention. FIG. 4 is a longitudinal sectional view of a temporary fixing member showing a third specific example of the present invention. FIG. 5 is a vertical cross-sectional view of a temporary fixing member showing a fourth embodiment of the present invention, and FIG. 6 is a partial vertical cross-sectional view illustrating the state of bolt tightening using a large nut runner. (2) - bolt, (3) - member to be joined, (4
)・----Parts to be joined, (5A) (5B) (5C) (5D) (
51! l-Temporary fixing member, (8)... Bolt insertion hole. Patent/Applicant Sanyo Kiko Co., Ltd.

Claims (1)

[Claims] (1) A bolt temporary fixing device characterized in that a bolt temporary fixing member is attached separately or integrally formed in a bolt insertion hole of one of a plurality of members to be fastened and joined by bolts.