JPH04203614A - Simultaneous rotation preventing device for tightening screw member - Google Patents

Abstract

PURPOSE:To prevent any simultaneous rotation so as to improve workability in a simultaneous rotation preventing device used when a member to be fixed is tightened to a steelwork member having a U-shaped cross section with a bolt by forming the simultaneous rotation preventing device into a U-shaped cross section, projecting simultaneous rotation preventing means in the upper and lower plate portions, and forming bolt penetrating holes. CONSTITUTION:A simultaneous rotation preventing device 1 comprises an upper plate portion 11, a lower plate portion 12 and a vertical plate portion 13 all integrally formed into a U-shaped cross section. Bolt penetrating holes 111, 121, locking portions 112, 122 engaged with a steelwork member 2, simultaneous rotation preventing pieces 113, 123 and groove-like relief portions 114, 124 for bringing a head of the bolt into close contact are formed in the upper plate portion 11 and the lower plate portion 12. The simultaneous rotation preventing device 1 is inserted into a space defined between upper and lower flanges 21, 22 of the steelwork member 2 having a U-shaped cross section, to be fixed together with members 4, 5 to be fixed by the bolt 3 and the nut 6. The rotation preventing pieces 113, 123 are engaged with the upper and lower flanges 21, 22 of the steelwork member 2, thus preventing any simultaneous rotation.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a tightening screw member that can prevent co-rotation when a nut is screwed into a bolt constituting a pair of tightening screw members. The present invention relates to a co-rotation prevention device, and particularly relates to a co-rotation prevention device for a bolt or a nand used in a steel frame member having a U-shaped cross section.

[Prior art] A pair of bolts and nuts, which are tightening and screwing members, are used to connect upper and lower flanges of a steel frame member (for example, an H-shaped steel) having a U-shaped cross section to a wall, which is a member to be fixed. When attaching building materials such as lumber, use separate stoppers on the upper and lower flanges to prevent the bolts or nuts on the threaded side from rotating.

The bolts or nuts on the screwing side were screwed together using a spanner or the like.

[Problems to be Solved by the Invention] However, as mentioned above (3) When installing building materials to the upper flange and the lower flange, if separate stoppers are used to prevent the bolts or nuts from rotating, the Since the stopper must be separately interposed, there is a problem in that workability is poor.

This invention was made in order to solve the above-mentioned problems, and it is difficult to attach building materials to the upper and lower flanges that constitute the cross-sectional opening portion of a steel frame member using a pair of tightening screw members. The main object of the present invention is to provide a co-rotation prevention device that can reliably prevent the tightening screw members from co-rotating, thereby improving workability.

[Means for Solving the Problems] The invention according to claim 1 provides a steel frame member that is inserted between an upper flange and a lower flange that constitute a U-shaped portion of a steel frame member, and that is attached to the upper flange and the lower flange. This is a co-rotation prevention device for a pair of tightening and screwing members that are screwed together to tighten members that are attached to a flange and a lower flange, the upper plate attached to the inner surface of the upper flange, the lower The lower plate part attached to the inner surface of the flange and the vertical plate part connecting the upper plate part and the lower plate part are integrally molded to have a substantially U-shaped cross section, and the upper plate part and the lower plate part are integrally formed. To.

A rotation preventing means is provided for preventing the pair of tightening screw members from rotating together when the pair of tightening screw members are tightened and screwed together.

The invention as claimed in claim 2 is characterized in that the rotation preventing means in the invention as claimed in claim 1 is in contact with a side end surface of a non-circular portion formed in one of the pair of tightening screw members. It is made up of contacting anti-rotation pieces.

[Function] According to the present invention, the upper plate portion and the lower plate portion attached to the upper flange and lower flange, respectively, which constitute the U-shaped portion of the steel frame member are integrally connected by the vertical plate portion. With the plate portion and the lower plate portion attached to the upper flange and the lower flange at the same time, the tightening and screwing work performed using the pair of tightening and screwing members can be performed quickly and reliably.

Further, according to the present invention, the rotation prevention means provided in the upper plate portion and the lower plate portion ensure co-rotation when the pair of tightening screw members are tightened and screwed together. It can be prevented.

[Example] An embodiment of the present invention will be described based on the drawings.

FIG. 1 is a perspective view of a device 1 for preventing co-rotation of tightening screw members according to this embodiment.

The co-rotation prevention device 1 is a steel member integrally formed with a substantially U-shaped cross section by an upper plate portion 11, a lower plate portion 12, and a vertical plate portion 13, and is a steel member 2 having a U-shaped cross section (for example, an H-shaped portion). the upper flange 21 of the steel frame member 2.
This is for non-rotatably supporting the bolts 3 constituting a pair of tightening screw members disposed on the lower flange 22 (see FIG. 3). Here, the co-rotation prevention device 1 is formed to a size so as to come into close contact with the inside of the U-shaped portion of the steel frame member 2 (see FIG. 3).

The upper plate part 11 and the lower plate part 12 have through holes 111 and 121 through which the bolts 3 are inserted, and an engagement for making the co-rotation prevention device 1 unrotatable with respect to the steel member 2. Stop portions 112, 122, anti-rotation pieces 113, 123 constituting anti-rotation means, and groove-shaped escape portions 114, 124 for bringing the bolt head 31 into close contact with the upper plate portion 11 and the lower plate portion 12 without any gaps. is provided. In addition, through hole 1
11. Instead of 121, a notch formed by cutting out the bolt insertion portion of the upper plate portion 11 or the lower plate portion 12 may be used.

The locking portions 112, 122 are formed by bending outward at the free ends of the upper plate portion 11 and the lower plate portion 12, respectively.
They are adapted to abut and lock on side end surfaces 21a and 22a of the upper flange 21 and the lower flange 22, respectively (see FIG. 3). The height t of these locking portions 112, 122 is set not to be higher than the wall thickness T (see FIG. 3) of the upper flange 21 and the lower flange 22.

The anti-rotation pieces 113 and 123 are attached to the upper plate portion 11, respectively.
and is bent inward at the side end of the lower plate part 12, and as shown in FIG. This is to make the bolt 3 unrotatable relative to the co-rotation prevention device ll. Here, the distance between the first detent piece 113 and the center of the through hole 111 is 11iΩ (first
(see figure), and the rotation prevention piece 123 and the through hole 121
The distance Q from the center (see FIG. 1) is approximately half the distance between the opposing side end surfaces 31a, 31a of the bolt head 31 shown in FIG.

Next, a third explanation will be given of the structure when the building materials 4 and 5, which are the members to be fixed, are attached using the co-rotation prevention device 1 of this embodiment.
This will be explained based on the diagram.

The bolts 3, 3 are connected to the through holes 111, 121 (not shown in the figure), the through holes 211, 221, . It passes through through holes 41.51 bored in the building materials 4, 5. Then, at the tip of each bolt 3゜3 there is a nut 6.6.
(tightening screw member) is screwed together. In addition, in FIG. 3, the reference numeral 7 is a washer.

Next, using the co-rotation prevention device 1 of this embodiment, the building materials 4 and 5 are
Regarding the installation procedure when attaching to the steel frame member 2, see the third
This will be explained with reference to the figure.

First, the co-rotation prevention device 1 is installed between the upper flange 21 and the lower flange 22 that constitute the U-shaped portion of the steel frame member 2.
are inserted into the through holes 211 and 221 formed in the upper flange 21 and the lower flange 22, and the co-rotation prevention device 1
Each through hole 111 formed in the upper plate part 11 and the lower plate part 12. . match each other. At this time, the locking portions 112 and 122 are connected to the side end surface 21a of the upper flange 21 and the side end surface 21a of the lower flange 22.
a so that they are respectively locked.

Next, bolts 3, 3 are inserted from the inside of the U-shaped part of the steel frame member 2.
The respective through holes 111, 121, 211°221.41
．． 51, and hold it by hand while the bolt head 31°31 is locked by the anti-rotation pieces 113, 123 so that it cannot rotate. The reason for pressing with this hand is that when screwing each nut 6.6 onto each bolt 3, 3, the bolt 3, 3 may fall or come up, causing the bolt head 31 to separate from the rotation stopper piece 113, 123. This is to prevent this from happening. Under such conditions, the nuts 6.6 are tightened and screwed onto the tips of the bolts 3, 3 through the building materials 4, 5 and the washers 7.7. The building materials 4 and 5 can be firmly tightened and fixed to the steel frame member 2 using the nuts 6.6.

According to the above embodiment, the following effects can be obtained.

That is, the upper plate part 11 and the lower plate part 12 of the co-rotation prevention device 1
Since the bolt head 31.31 is held unrotatable by the anti-rotation pieces 113 and 123 provided in the nut 6.6,
When the nuts 6.6 are tightened, it is possible to reliably prevent the bolts 3, 3 from rotating in the same direction. Since the locking portions 112 and 122 are locked to the side end surface 21a of the upper flange 21 and the side end surface 22a of the lower flange 22, the upper flange 21 and Upper plate part 11 and lower plate part 12 arranged inside the lower flange 22
It is possible to reliably prevent the rotation of the
The co-rotation prevention device 1 can be held unrotatably with respect to the steel member 2. Therefore, unlike in the conventional case, there is no need to use separate stoppers to prevent rotation of the bolts or nuts, so the workability of tightening the bolts and nuts is improved.

In the above embodiment, a case has been described in which the bolt 3.3 of the bolts and nuts constituting a pair of tightening screw members is held unrotatable by the anti-rotation pieces 113 and 123, but the nut 6. Needless to say, the present invention can also be applied to the case where the rotation stopper 6 is held unrotatably by the anti-rotation pieces 113 and 123.

Further, in the above embodiment, the steel frame member 2 is made of H-shaped steel, but it is not limited to this, and any shape of the steel frame member may be used as long as it has a U-shaped cross section. .

Furthermore, in the above embodiment, the locking parts 112 and 122 are provided on both the upper plate part 11 and the lower plate part 12, but only on either the upper plate part 11 or the lower plate part 12. It may be provided.

Furthermore, in the above embodiment, the through holes 111 and 121 are provided in the upper plate part 11 and the lower plate part 12, but the through holes 111 and 121 are provided only in either the upper plate part 11 or the lower plate part 12. You can leave it there.

Further, in the above embodiment, the upper plate portion 11 is provided with two anti-rotation pieces 113, 113, but only one of them may be provided. Anti-rotation piece 12 of lower plate portion 12
The same applies to 3,123.

Further, in the above embodiment, the one-rotation stop means includes a rotation stopper piece 113 that abuts on the side end surface 31a of the bolt head 31;
123, but the present invention is not limited thereto, and any rotation preventing means may be used as long as the bolt head 31 is held unrotatably in the co-rotation prevention bag W1.

Furthermore, in the above embodiment, the single rotation stopper piece 113
, 123 and the center of the through holes 111, 121 is the distance 11 between the opposing side end surfaces 31a, 31a of the bolt head 31.
Although Q is approximately 1/2 of L, it is not limited to this, and Q is approximately 1/2 or more of L, and the distance D between the diagonal corners of the bolt head 31 (see Fig. Reference) 1/
It is good if it is smaller than 2.

[Effects of the Invention] According to the present invention, the upper plate portion and the lower plate portion attached to the upper flange and lower flange, respectively, which constitute the U-shaped portion of the steel frame member are integrally connected by the vertical plate portion. With each of the upper plate portion and the lower plate portion attached to the upper flange and the lower flange at the same time, the tightening and screwing work performed using the pair of tightening and screwing members can be performed quickly and reliably. Therefore, unlike the conventional case, there is no need to use separate stoppers to prevent rotation of the bolts or nuts, and the workability of tightening the bolts and nuts can be improved.

Further, according to the present invention, by the rotation prevention means provided on the upper plate part and the lower plate part.

It is possible to reliably prevent co-rotation when the pair of tightening screw members are screwed together.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a co-rotation prevention device for tightening screw members according to the present invention. Fig. 2 is a partially enlarged perspective view for explaining the engagement state between the anti-rotation means of the co-rotation prevention device in this embodiment and the bolt, which is a tightening screw member, and Fig. 38 is a partially enlarged perspective view for explaining the co-rotation prevention device in this embodiment. using the device. It is a sectional view showing a state where building materials are attached to a steel frame member. 1... Co-rotation prevention device, 2... Steel frame member, 3...
...Bolts (tightening screw members), 4.5...Building materials (
(fixed member), 6... Nut (tightening screw member) 11
...Top plate part, 12...Bottom plate part, 13...Vertical plate part, 21...Top flange, 22...Bottom flange, 31a...Side end surface, 113, 123... Rotation prevention piece (rotation prevention means). Agent Patent Attorney Hiroshi Arafune −

Claims (2)

[Claims] (1) A screw is inserted between the upper flange and the lower flange that constitute the U-shaped part of the steel frame member, and the member to be fixed attached to the upper flange and the lower flange is fastened to the upper flange and the lower flange. A co-rotation prevention device for a pair of mating tightening screw members, comprising: an upper plate portion attached to the inner surface of the upper flange; a lower plate portion attached to the inner surface of the lower flange; and the upper plate. and the lower plate part are integrally molded to have a substantially U-shaped cross section, and the pair of tightening screw members are tightened and screwed to the upper plate part and the lower plate part. 1. A device for preventing co-rotation of tightening screw members, characterized in that the pair of tightening screw members is provided with a rotation preventing means for preventing the pair of tightening screw members from rotating together. (2) The rotation prevention means is constituted by a rotation prevention piece that comes into contact with a side end surface of a non-circular portion formed on one of the pair of tightening screw members. A device for preventing co-rotation of a tightening screw member according to claim 1.