JPH0632723U - bolt - Google Patents

Abstract

(57) [Summary] [Purpose] Bolts that can be easily tightened by being able to temporarily hold them while they are still inserted in the bolt insertion holes provided in the tightened parts. To provide. [Structure] A concave portion 5 for mounting a temporary holding member is provided on a bolt cylindrical portion 4 left between a screw portion 3 of a bolt shaft portion 1 and a bolt head portion 2, and the concave portion 5 is provided outside the outer diameter of the screw portion 3. A temporary holding member 6 made of synthetic resin having an elastic locking claw 8 with a guide taper surface extended to the end is integrally mounted with its mounting base 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bolt that can be temporarily held while being inserted into a bolt insertion hole provided in a tightened component without coming out.

[0002]

[Prior art]

 Conventional bolts are usually bolts that have a threaded portion on the bolt head, but such bolts are used when attaching tightened members such as automobile interior parts to the vehicle body. Since it is not possible to temporarily hold the inserted member in the insertion hole without pulling it out, when attaching the tightened member to the vehicle body, etc., the bolt inserted hole of the tightened member was welded to the vehicle body side. The bolts that were set in the socket of the impact wrench held in the other hand were pressed against the bolt insertion holes so that they would be aligned with the screw holes of the weld nut and held in place with the other hand.

However, when the bolt set in the socket of the impact wrench falls out of the socket, one hand holding the member to be tightened must be borrowed to set the bolt in the socket again. There is a problem that workability is extremely deteriorated because the pressure of the tightened member is once released, the bolt is set again in the socket, and then the tightened member is again put on the vehicle body and pressed by one hand.

[0004]

[Problems to be solved by the device]

 The problem to be solved by the present invention is to solve the above-mentioned problems by allowing the bolt to be preliminarily held in the bolt insertion hole provided in the tightened part without coming out. To provide bolts.

[0005]

[Means for Solving the Problems]

 The bolt of the present invention, which has solved the above-mentioned problems, is provided with a concave portion for mounting a temporary holding member in the cylindrical portion of the bolt left between the screw portion of the bolt shaft portion and the bolt head portion. It is characterized in that a temporary holding member made of synthetic resin, which has an elastic locking claw with a guide taper surface that extends outward from the outer diameter of the portion, is integrally mounted with its mounting base.

[0006]

【Example】

 Next, the present invention will be described in detail with reference to the embodiments shown in FIGS. Reference numeral 1 denotes a bolt shaft portion formed subsequent to the bolt head portion 2. The bolt shaft portion 1 is provided with a screw portion 3 at a portion near the bolt head portion 2 except for a bolt cylindrical portion 4. An annular groove serving as a recess 5 for attaching the temporary holding member is formed in the bolt cylindrical portion 4 while leaving a portion corresponding to the thickness of the member to be tightened between the bolt cylindrical portion 4 and the bolt head 2.

Reference numeral 6 denotes a synthetic resin temporary holding member that is integrally mounted in the recess 5 with the mounting base portion 7. In the embodiment, the temporary holding member 6 is a synthetic resin ring insert-molded into the annular groove as the recess 5. A body is used as a mounting base 7, and a plurality of elastic locking claws 8 with a guide taper portion which are projected outward from the screw outer diameter are integrally formed at a required interval.

With such a structure, when the bolt shaft portion 1 is inserted into the bolt insertion hole 11 of the tightened member 10, the elastic locking claw 8 is guided by the guide taper portion and is elastically deformed by the elasticity. It is bent inward and inserted into the bolt insertion hole 11 of the member 10 to be tightened, and thereafter, the elastic locking claws 8 are restored by elasticity and each elastic locking claw 8 is locked at the lower end edge of the bolt insertion hole 11. As a result, the bolt is accurately and temporarily held by the temporary holding member 6 in the bolt insertion hole 11 of the tightened member 10.

When the temporary holding member 6 is temporarily held in the bolt insertion hole 11 in this way, the bolt becomes an assembly with the member to be fastened 10, and therefore the member to be fastened 10 is gripped in this state. The tip of the bolt that is temporarily held in place should be applied to the screw hole position of the weld nut welded to the car body, and the bolt should be tightened with a tightening tool such as an impact wrench. Since it does not fall off from the insertion hole and does not fall off from the tightening tool, it is possible to accurately and easily fix the member to be tightened to the vehicle body.

It should be noted that the recesses 5 for mounting the temporary holding member are formed in the bolt cylindrical portion 4 at a required interval, and the elastic locking claws 8 are embedded in the recesses 5 with their mounting bases 7, respectively. However, as in the embodiment, the concave portion 5 for mounting the temporary holding member is an annular groove, and the temporary holding member 6 is a synthetic resin ring body insert-molded in a state of being embedded in the annular groove. When the elastic locking claws 8 are integrally molded at one end thereof with a required space, a plurality of elastic locking claws 8 and one attachment are used when manufacturing a mold for insert molding. Since the base 7 can be the same gate, it is easy to manufacture, and the temporary holding member 6 made of synthetic resin in which a plurality of elastic locking claws 8 are connected by the ring body as the mounting base 7 has excellent mounting strength. It is more preferable because it will be obtained.

[0011]

[Effect of device]

 As will be apparent from the above description, the present invention provides a concave portion for mounting a temporary holding member on the bolt cylindrical portion left between the screw portion of the bolt shaft portion and the bolt head portion, and the concave portion for attaching the temporary holding member is provided on the concave portion. The elastic locking claw made of synthetic resin, which has a guide taper surface that extends outward from the diameter, is integrally mounted with its mounting base, so simply insert the bolt into the bolt insertion hole of the member to be tightened. Since it is possible to accurately temporarily hold the bolt in advance with respect to the tightened member, therefore, when inserting the bolt into the bolt insertion hole of the tightened member with the impact wrench temporarily holding the bolt. There is no longer a situation where the bolt will fall off during the process of inserting it into the bolt insertion hole like in the above, and it is a wasteful work to reset the bolt every time the bolt comes out of the impact trench socket as in the past. No, it is possible to perform very efficiently bolted. However, since the assembly can be delivered to the assembly factory as an assembly in which bolts are temporarily held on the tightened member, the assembly man-hours can be reduced and the number of assembly parts can be reduced. It has many advantages such as cost reduction. Therefore, the present invention solves the problems of the conventional bolts of this type, and when the bolt is formed by a well-known method such as cold heading, a concave portion for mounting the temporary holding member is provided in the cylindrical portion of the bolt. However, since it is only necessary to attach an elastic locking claw made of synthetic resin to this by using an insert molding method or the like, the practical value is extremely great in combination with the advantage that it can be provided at a low cost.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a front view showing a usage state of the present invention.

[Explanation of symbols]

 1 Bolt Shaft Part 2 Bolt Head Part 3 Screw Part 4 Bolt Cylindrical Part 5 Recessed Part 6 Temporary Holding Member 7 Mounting Base Part 8 Elastic Locking Claw

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiromichi Mizuno 1 Otaka-cho, Oguchi-machi, Niwa-gun, Aichi Prefecture 1 Otashiji, Takahashi 1 Aoyama Plant Co., Ltd. Oguchi Plant (72) Yoshihiro Murase Oguchi-machi, Niwa-gun, Aichi Prefecture 1 in Takahashi, Oyashiki character Aoyama Manufacturing Co., Ltd. Oguchi factory

Claims (2)

[Scope of utility model registration request] 1. A recess (5) for mounting a temporary holding member is provided on a bolt cylindrical portion (4) left between a screw portion (3) of a bolt shaft portion (1) and a bolt head portion (2). An elastic locking claw (8) with a guide taper surface that extends outward from the outer diameter of the screw part (3)
Attach the temporary holding member (6) made of synthetic resin having
A bolt characterized by being attached integrally with (7). 2. A recessed part (5) for mounting the temporary holding member is an annular groove, and the temporary holding member (6) is fitted with an annular groove and is fitted with an insert-molded synthetic resin annular body. The bolt according to claim 1, wherein an elastic locking claw (8) is integrally formed at one end of the base portion (7) at a required interval.