JPH0325649B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bolt/nut fastening device using a washer such as a disc spring, and particularly to this type of bolt/nut fastening device suitable for on-site construction.

[Conventional technology]

Conventionally, as the bolt/nut fastening device mentioned above,
As shown in FIG. 5, a disc spring 7 called a Belleville washer is interposed between the head 2 of the bolt 1 and the member 4 to be fastened, and between the nut 3 and the member 4 to be fastened. There is one in which a bolt 1 is passed through a hole 6 of a fastening member 4 and tightened with a nut 3. The member to be fastened 4 is, for example, a buzz bar connecting portion of a bus duct.

Therefore, when inserting the bolt 1 into the fastened member 4 through the backing plate 14, one plate spring 7 is passed through the bolt 1, and then the bolt 1 is passed through the hole 6 of the fastened member 4, and then one disc spring 7 is inserted into the fastened member 4. After passing the disc spring 7 through the bolt 1, the nut 3 was attached and tightened.

The disc spring is a washer having a slight conical slope, and it is difficult to distinguish between the front and the back, so there have been cases where the disc spring is installed in the opposite direction.

Furthermore, even if the disc spring is installed in the correct direction, if there is no mechanism to prevent the bolts from rotating together, when the nut is turned and tightened, the bolts may also rotate, resulting in insufficient tightening.

[Problem that the invention seeks to solve]

In such a conventional bolt-nut fastening device, a washer is interposed between the head of the bolt and the member to be fastened, and between the nut and the member to be fastened, and the bolt is pressed into the hole in the member to be fastened. Since the washer was passed through and tightened with a nut, the tightening work was complicated and the washer could fall off. Furthermore, when a disc spring is used as a washer, it can be incorrectly installed in the wrong direction, causing loss of spring characteristics and impairing the function of the fastened object, especially when used to maintain electrical connections such as bus duct connections. It was a serious problem.

Further, even when the disc spring is installed in the correct direction, the bolt and nut rotate together, resulting in insufficient tightening, which impairs the function of the fastened member.

The present invention has been made in view of the problems of the prior art described above.

[Means for solving problems]

In order to eliminate the above-mentioned problems in the conventional ones, the present invention is directed to the surface 5 of the fastened member 4 that is tightened by the head 2 of the bolt 1 and the nut 3 as shown in FIGS. 1, 2, and 3. In order to prevent the washer 7 provided at the position of the hole 6 into which the bolt 1 is inserted from deviating from its position, the washer 7 is provided so as to cover the washer 7, and the head of the bolt 1 is restrained. A washer support member 8 whose part 2 or nut 3 is brought into contact with the washer 7 is attached to the bolt 1.
surface 5 which is tightened by the head 2 and the nut 3;
It is fixed at .

In addition, in FIGS. 1, 2, and 3, the head 2 of the bolt 1 or the corner side of the nut 3 is attached to the portion of the washer support member 8 at the position where the head 2 of the bolt 1 or the nut 3 is locked. at least 2 sides 1
A locking member 12 of a bolt 1 or a nut 3 having a hole 11 that engages with a bolt 1 or a nut 3 is locked.

Further, in FIG. 4, the head 2 or nut 3 of the bolt 1 is attached to the portion 9 of the washer support member 8 at the position where the head 2 or nut 3 of the bolt 1 is engaged.
It is provided with a hole 11 in which at least two corner sides 10, 10 of the holder are engaged.

[Effect]

According to the above-mentioned means of the present invention, in FIG. 1, the washer support member 8 is arranged and fixed so as to cover the washer 7, and
The washer 7 is not moved from the position of the hole 6 of the fastened member 4 into which the bolt 1 is inserted.

Furthermore, in FIG. 4, at least two surfaces 10, 10 of the head 2 of the bolt 1 or the corner sides of the nut 3 are engaged with the hole 11 provided in the washer support member 8, so that the bolt 1 and the nut 3 are prevented from rotating together. .

In addition, in FIGS. 1, 2, and 3, the head 2 of the bolt 1 or the nut 3 is inserted into the hole 11 provided in the detent member fitted to the washer support member 8.
At least two corner sides 10, 10 of the bolt 1 and the nut 3 are prevented from rotating together.

Example 1 The present invention will be explained below using examples shown in the drawings.

1, 2, and 3 show an embodiment of the bolt/nut fastening device of the present invention, in which a backing plate 14 is placed on the surface 5 of the member 4 to be fastened, which is in contact with the head 2 of the bolt and the nut 3. provided, the member to be fastened 1
4 and the backing plate have holes 6 for passing bolts 1 for fastening.
is provided. A washer, that is, a disc spring 15 is placed over the hole 6, and in order to further restrain the position of the disc spring 15, a concave section is formed using a steel plate or the like, and the disc spring 15 is placed in the center of the bottom of the disc spring 15. A washer support member 8 having a notch 16 along the outer contour of the disc spring 15 so that the head 2 or nut 3 of the bolt 1 comes into contact with the disc spring 15 is attached to the disc spring 15. 15, and the above surface 5
It is configured such that it is fixed with machine screws 17. Note that 18 is a hole through which the machine screw 17 passes, and 19 is a screw hole into which the machine screw is inserted.

According to the bolt/nut fastening device configured in this way, the washer support member 8 restrains the position of the disc spring 5, and the bolt 1 of the member to be fastened 4
Since the disc spring 15 does not move from the position of the hole 6 into which it is inserted, the fastening work is simplified, and the disc spring 15 can be attached to the surface 5 of the member 4 to be fastened in advance. 15 will not fall off.

Furthermore, even in the case of on-site work, the function of the member 4 to be fastened will not be impaired due to the disc spring 15 being erroneously attached in the opposite direction.

In FIGS. 1, 2, and 3, the head 2 of the bolt 1 is attached to the washer support member 8 at the position where the head 2 of the bolt 1 or the nut 3 is engaged.
or two opposing sides 1 on the corner sides of the nut 3
A detent member 12 having a concave cross section larger than that of the washer support member 8 and having a hole 11 that engages with the washer support member 8 is locked at the position of the notch 16 of the washer support member 8. ing.

According to the bolt-nut fastening device configured in this way, a detent member is engaged and fixed to the head 2 of the bolt 1 or the two opposing faces 10, 10 on the corner side of the nut 3 and the washer support member 8. Since the 12 holes 11 are engaged, the bolt 1 and the nut 3 do not rotate together.

Therefore, the function of the fastened member will not be impaired due to insufficient tightening of the bolt/nut.

Embodiment 2 In FIG. 4, the head 2 of the bolt 1 or the nut 3 is attached to the portion of the washer support member 8 that has a concave cross section at the position where the head 2 of the bolt 1 or the nut 3 is locked. It is configured to include a hole 11 that engages with two opposing surfaces 10, 10 on the corner sides.

According to the bolt/nut fastening device configured in this way, the two opposing surfaces 10, 10 of the head 2 of the bolt 1 or the corner side of the nut 3 are engaged with the hole 11 provided in the washer support member 8. Bolt 1 and nut 3 do not rotate together. Therefore, the functions of the fastened members will not be impaired due to insufficient tightening of the bolts and nuts.

In addition, in the above embodiment, the washer support member 8
Although this is a single component, it is also possible to construct a pair of combinations by cutting out a narrow portion with a notch.

Also, the pores 11 of the washer support member 8 itself
Alternatively, the rotation preventing member 12 having the hole 11 may be provided on the nut side, in which case the head side of the bolt is opened and becomes a tightening portion by engagement with a tool such as a wrench.

In addition, the washer 15 can be used in addition to a disc spring (Belleville washer), as well as similar embodiments, such as:
Leaf springs and flat washers are also applicable.

Furthermore, the washer support member 8 can be fixed to the washer support member 14 by welding, in addition to the above-mentioned screw fixing.Furthermore, a protrusion is provided on the caul plate 14 by cutting and raising, and the protrusion is bent onto the set washer support member. It is also possible to obtain a fixed state by crimping.

〔Effect of the invention〕

As explained above, the bolt-nut fastening device according to the present invention has a washer such as a disc spring provided at the position of the hole into which the bolt is inserted between the head of the bolt and the surface of the fastened member to be fastened by the nut. In order to prevent the washer from deviating from the washer, a washer support member is provided to cover the washer, restrain the position of the washer, and bring the head or nut of the bolt into contact with the washer. Since the washer is fixed to the surface to be tightened by the bolt and the nut, the washer will not move from the position of the hole where the bolt is inserted, making the tightening work easier. Since the washer can be kept in place, the function of the member to be fastened will not be impaired due to the washer falling off or the washer having been set for the front and back positions being installed upside down.

Furthermore, since the bolt and nut do not rotate together, there is an excellent effect that the functions of the members to be fastened are not impaired.

[Brief explanation of the drawing]

1 to 4 show embodiments of the present invention, and FIG. 5 shows a conventional example. Fig. 1 is a perspective view showing the assembly arrangement of the bolt-nut fastening device, Fig. 2 is a side view of the bolt-nut fastening device, Fig. 3 is a front view of the main parts, and Fig. 4 is a perspective view of another embodiment of the washer support member. , FIG. 5 is a longitudinal sectional view of the main part. 1...Bolt, 2...Head, 3...Natsuto, 4
... member to be fastened, 5 ... surface, 6 ... hole, 7 ... washer (disc spring), 8 ... washer support member,
11... Hole gap, 12... Rotating member, 13...
Member, 14... Backing plate, 15... Belleville spring, 16...
...Notch.

Claims (1)

[Scope of Claims] 1. In order to prevent the washer provided at the position of the hole into which the bolt is inserted on the surface of the fastened member to be tightened by the bolt and nut from deviating from that position, the washer is provided so as to cover the washer. A washer support member that restrains the position of the washer and brings the head of the bolt and the nut into contact with the washer is fixed to a surface to be tightened by the bolt and nut, The washer is characterized in that the part of the washer support member at the position where the head of the bolt or the nut is locked is provided with a hole that engages with at least two corner sides of the head of the bolt or the nut. Bolt nut fastening device. 2. The device according to claim 1, wherein the hole edge provided in the portion of the washer support member where the head of the bolt or the nut is engaged is formed in the washer support member itself. 3. The hole edge provided in the portion of the washer support member at the position where the head of the bolt or the nut is locked is formed in a detent member that is combined and fixed to the main body of the washer support member. Apparatus described in section. 4. The washer support member is made of a plate material molded into a concave shape, and has a notch along the outer contour of the washer, and the notch is brought into contact with the washer. The device according to any one of Items 1 to 3. 5. The device according to any one of claims 1 to 4, wherein the washer is a disc spring (Belleville washer).