JPS6032048B2 - Bolt set with removable co-rotation prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a removable bolt set with anti-rotation mechanism used for vertically mounting automobile parts.

Tightening of this type of auto parts is not limited to inserting bolts from above and tightening nuts from below, or vertically using bolts and nuts from both sides in the horizontal direction, but inserting bolts from vertically or diagonally below. It is often installed vertically. In such a case, hold a tool in one hand to hold the bolts so that they do not fall off and do not rotate together.
It is extremely inefficient to tighten each nut one by one using a vertical tool with a polygonal hole that fits the nut held in the other hand.

Particularly in the case of automobile parts, since they are mass-produced and often use a large number of bolts arranged in parallel at the same location, there is a need for a means that can efficiently tighten these bolts.
However, in the past, for example, after inserting a bolt into a member to be tightened, the polygonal head of the bolt was fixed to the member by spot welding or arc welding, or as shown in FIG. After providing a flange portion 3 on the square head 2, the bolt 1 is inserted into a rotation prevention member 4 provided with a polygonal hole 4a, and the square head 2 protruding inwardly is tightened and integrated. , which prevented bolt retention and rotation. However, welding a bolt to a member to be fastened takes a lot of man-hours, making it difficult to improve tightening efficiency, and the heat from welding makes the bolt material brittle, reducing its quality.

In addition, in the case of Fig. 1, since the anti-rotation member 4 of the flange portion 3 is added, the number and weight of parts increase, which increases costs, requires more man-hours for managing the parts, and also prevents rotation even after vertical installation. The member 4 remains attached and cannot be reused, and has drawbacks such as loss of material and increased weight.

The present invention has been made to solve the above-mentioned drawbacks, and by making the bolt and the co-rotation prevention device removable, it is possible to securely hold the bolt and prevent the co-rotation when parts are vertically mounted, and After tightening, it is easily separated from the bolt and can be used repeatedly for tightening bolts, reducing total costs.It is also possible to insert many bolts in parallel at the same time. The purpose is to provide a bolt set with the following features. Embodiments of the present invention will be described below based on the accompanying drawings. First, the structure of the first embodiment shown in FIG. 2 will be explained. Bolt A has a koji part 11 with a screw carved into its tip, and has a square head 12 with a hexagonal shape similar to a normal bolt. Recesses 14 are provided at intermediate height positions so that each corner is removed. Further, B is a co-rotation prevention odor, in which a bolt attachment/detachment portion is formed at each position that matches each hole C of the member C to be tightened, and each bolt attachment/detachment portion is connected via an arm portion 15. There is.

A polygonal hole 16 into which the square head 12 of the bolt A can be accommodated is formed in each of these bolt attachment/detachment parts, and the whole is made of metal or synthetic resin material. The anti-rotation odor A is placed at approximately the middle height position within each polygonal hole 16, that is, the bolt A is placed in the polygonal hole 1.
An annular groove 17 with a predetermined depth is provided in the intermediate band that matches the recess 14 of the bolt A when the iron is collected so that the bottoms of both sides coincide with each other. An annular elastic body 1 with a portion of a wire spring plate spring etc. cut out as a locking part village
8 is housed in such a manner that it protrudes from the inner wall surface of the polygonal hole 16 so that it can exert a resilient force in the inward direction.

Then, when the square head 12 of the bolt A is inserted under pressure into the polygonal hole 16 of each bolt attachment/detachment part of the anti-rotation bolt B, the elastic body 18 is in a pressure saddle state in the recess 14 of the square head 12. They are locked together to form a bolt set with an integrally attached and detachable anti-rotation bolt set. When tightening each bolt A to the member C to be tightened using the above-mentioned bolt set, hold the co-rotation prevention device B in which the bolts A are set in the polygonal hole 16 in advance, and Part C, each bolt A
When inserted while aligning the ball parts 11 of the bolts, each bolt A is elastically held against the co-rotation prevention odor B, so even if inserted from below, it will not fall off, and multiple bolts installed in parallel can be inserted. can be inserted at the same time.

Then, screw the nuts N together from the other side and braze them.
Since the square head 12 of the bolt A is contained in the polygonal hole 16 of the co-rotation prevention odor B, it acts as a rotation stopper for each bolt, and the bolt attachment/detachment parts are connected to each other via the arm part 15. Because of this, the co-rotation prevention tool B itself does not rotate and can be attached easily and reliably. Further, after all the bolts A have been tightened, if the co-rotation prevention odor B is pulled out with a force greater than the locking force in the opposite direction of bolt insertion, the recess 14 of each bolt A will be removed.
The engagement mode is released against the elastic force of the elastic body 18 that was competing against the bolt A, and the bolt A can be smoothly separated from the bolt A.
Note that the removed co-rotation prevention odor B can be used repeatedly for the same vertical installation work by setting the bolt A in the polygonal hole 16 again in the same manner as described above.

FIG. 3 shows a second embodiment of the invention.

In this embodiment, as shown in the left half of the figure, the recess 24 of the bolt D is provided at a position close to the top of the square head 22, and the annular groove 27 of the anti-rotation odor E is also moved upward accordingly.
When the bolt ○ is inserted into the polygonal hole 26, a step is formed between the seat surface of the square head 22 and the bottom surface of the anti-rotation E.

Therefore, as shown in the right half of Fig. 3, when the bolt D set in the co-rotation prevention device 8 is inserted into the hole C of the part C to be tightened and tightened with the nut N, the vertical mounting is completed. Sometimes the concave portion 24 of the bolt D escapes from the elastic body 28 in the annular hawk 27 and releases the engagement, so the co-rotation prevention odor E is automatically prevented even if it is not pulled out after vertical attachment is completed as in the first embodiment. It can be removed at will.

FIG. 4 shows the left half of the third embodiment of the present invention.

In this embodiment, the co-rotation prevention odor B is formed in exactly the same way as in the first embodiment, but the bolt F has a washer-like flange portion 33 integrally located directly below the square head 32 provided in the recess 34. is formed.

Therefore, after vertically installing the bolt F, the anti-rotation odor B is pulled out in the opposite direction of the bolt insertion, as in the first embodiment, and the bolt F is removed.
However, since there is a gap corresponding to the thickness of the flange portion 33 between the member to be tightened C and the co-rotation prevention odor B, it can be easily pulled out for separation.

Next, FIG. 5 shows the right half of the fourth embodiment,
In this embodiment, the bolt F is formed with a flange portion 33 on the same machine as the third embodiment, but the co-rotation prevention odor G is
A flange hole 49 for receiving the flange portion 33 of the bolt F therein is provided at a position directly below the polygonal hole 46.

Therefore, when the co-rotation prevention tool G is pressed in order to insert the bolt F into the hole C of the member C to be tightened, the bottom surface of the prevention tool G comes into contact with the surface of the member C to be tightened. The preventer G allows the bolt F to be stably inserted without any flaking.

Furthermore, FIG. 6 shows a fifth embodiment of the present invention.

In this embodiment, the bolt date is formed with a flange portion 53 in almost the same manner as in the embodiment shown in FIG. When the bolt is collected, a step is formed between the seat surface of the flange portion 53 and the bottom surface of the anti-rotation J.
A flange hole 59 is continuously provided directly below the polygonal hole 56.

Therefore, similarly to the second embodiment shown in FIG. 3, if the bolt date set in the co-rotation prevention odor J is inserted into the hole C of the member C to be tightened and then tightened with the nut N, As shown in the right half of Fig. 6, the recess 54 of the bolt bolt escapes from the elastic body 58 in the annular groove 57 and releases the engagement at the same time as the vertical mounting is completed, so that the bolt bolt is rarely installed to prevent co-rotation. J
can be automatically removed.

Next, in addition to the above-mentioned embodiments, the present application can take various modifications within the scope of the gist.

For example, a locking member made of an elastic body such as a wire spring or a plate spring, and a groove that competes with the locking member do not necessarily have to be annular all around the entire circumference. For example, an arc-shaped groove may be provided, and elastically acting locking members of a length that fits within the groove may be accommodated, or spherical grooves may be provided at multiple locations and springs and steel used as locking members may be installed inside the grooves. The iron may be collected in a manner that prevents the balls from escaping. Further, in the above-mentioned embodiment, bolt attachment/detachment portions are provided at two locations, but these are not limited to two locations, but may be provided at two or more locations and connected to each other via the respective arm portions. These can also be arranged in triangular, square, or other arbitrary shapes other than in a straight line. It is also possible to provide the arm with a mechanism for adjusting the length so that the positions between the bolt attachment and detachment parts can be arbitrarily set. Furthermore, the square head of the bolt may be made into a polygon other than a hexagon, and the polygonal hole of the co-rotation prevention tool may be made into a shape that matches this shape, etc., which may be arbitrarily selected within the scope of the subject matter of the present application.

As described above, the set bolt of the present invention has a groove formed on the inner wall surface and a polygonal hole that fits the square head of the bolt, and a locking member that acts elastically on the inside of the bolt for attachment and detachment. A co-rotation prevention tool that connects each of the bolt attachment/detachment parts via an arm, and a hexagonal or other polygonal square head. and each bolt has a concave part on the outer surface of the square head, and the locking member presses the concave part against the square head of each bolt that is inserted into the polygonal hole of each bolt attachment/detachment part. It is removably locked in this manner.

Furthermore, a step is provided between the locked bolt seating surface and the bottom surface of each bolt attachment/detachment portion of the co-rotation prevention tool for releasing the bolt from the locking when the bolt is completely tightened.

As a result, multiple bolts can be inserted simultaneously into each hole of the bolt to be tightened arranged at any angle without falling off during tightening work, and each bolt can be inserted at the same time to prevent co-rotation. Since the cotton can be attached sequentially without using a lining, the efficiency of the attachment work can be greatly improved. Moreover, since the co-rotation prevention odor can be automatically separated from the bolt when the threading is completed, repeated use is possible and the weight of the parts can be reduced. In addition, this bolt set can be pre-installed by a screw manufacturer before being delivered to an automobile manufacturer, and delivered in this condition, resulting in significant savings in parts management time. It is.

[Brief explanation of the drawing]

Fig. 1 is a detailed view showing the aspect of preventing falling off and preventing rotation by bolts and caulking in a conventional example, and Fig. 2 shows a bolt set equipped with a removable co-rotation prevention device according to the first embodiment of the present invention and its FIG. 3 is a similar longitudinal sectional view of the second embodiment; FIG. 4 is a similar longitudinal sectional view showing the left half of the third embodiment; FIG. 6 is a similar vertical cross-sectional view showing the right half of the fourth embodiment, and FIG. 6 is a similar vertical cross-sectional view of the fifth embodiment. Explanation of symbols, 11... Screw shaft portion, 12, 22, 32
, 52... Square head, 14, 24, 34, 54.
・・・・・・Concavity, 15, 25, 45, 55...
Arm part, 16, 26, 46, 56... Polygonal hole, 17,
27, 47, 57... annular groove, 18, 28, 4
8, 58...Elastic body, 59...Flange hole, A, D, F, Day... ...Bolt, B, E, G
, J... Co-rotation prevention odor, C... Member to be tightened, C. ...Anabe, N...Natsuto.
Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. A bolt attachment/detachment part comprising a square hole that fits the outer periphery of the square head of the bolt, a groove formed in the inner wall of the square hole, and a locking member that operates elastically accommodated in the groove. A co-rotation prevention device is provided at a plurality of locations at predetermined intervals that match the mounting hole of the member to be tightened, and connects each bolt attachment/detachment portion via an arm portion, and a locking member is attached to the outer surface of the square head. A removable co-rotation prevention device comprising a plurality of bolts each having a concave portion that can be fitted together, each of the bolts being removably locked to each bolt attachment/detachment portion of the co-rotation prevention device. bolt set. 2. A step is provided between the seat surface of the locked bolt and the bottom surface of each bolt attachment/detachment part of the co-rotation preventive device, so that the bolt can be attached and detached from the lock when the tightening of the bolt is completed. A bolt set comprising a removable co-rotation prevention device according to claim 1.