JP2001248622A - Tightening tool composed of bolt and nut - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily set a tightening tool composed of a bolt and a nut to a channel member or a structural member having a C-shaped cross section and prevent co-rotation of the bolt when the nut is tightened even if it has a simple improved structure. SOLUTION: This tightening tool is used in the channel member 3 or the structural member 4 having substantially C-shaped cross section, A head part 1b of the bolt 1 consists of a width direction part 1c constituted so as to have substantially same dimension W as a diameter D of a shaft part 1a and a length direction part 1d constituted so as to have a dimension L larger than the diameter D of the shaft part 1a and a larger length than an inner dimension L1 in the longitudinal direction of the channel member 3 or the structural member 4 and has a thickness T smaller than an inner dimension L2 in the width direction of the channel member 3 or the structural member 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a fastener comprising a bolt having a threaded shaft and a nut screwed to the bolt, and more particularly to a channel member having a substantially C-shaped cross section. The present invention relates to a fastener comprising a bolt and a nut which are convenient for use as a structural material.

[0002]

2. Description of the Related Art A general fastener comprising a bolt having a threaded shaft and a nut to be screwed thereto is the most important component as a mechanical element, but various ideas for improving its function have been developed. Innumerable proposals have been made, the main problem of which is how to tighten easily and not to loosen.

[0003]

By the way, recently, it has been difficult to use bolts and nuts for a channel material frequently used as a structural material or a structural material having a C-shaped cross-sectional view. In this case, in this case, the shaft of the bolt passes through the opening (slit) of the channel material or the cross-sectional view in the shape of the letter C, and this opening (slit) is usually formed with the shaft diameter of the bolt. Of substantially the same size, so that the head of the bolt cannot, of course, be passed through this opening (slit), but is inserted through the upper end opening of the channel or structural material. Then, a method of sliding to a predetermined position is adopted, and when such a channel material or a structural material is already built or is specially arranged, such a bolt is used. Is the setting of a predetermined position has been a very troublesome.

Further, apart from such a problem of bolt setting, when tightening the nut, the head of the nut is hidden by a jig such as a spanner or the like which is difficult to hold (for example, the above-described channel material or C-shaped cross-sectional view). Structural material exhibiting
In addition, there is also a problem that the nut rotates around when the nut is fitted and rotated.

[0005] In view of the above problems, the present invention can be easily set to a channel material or a structural material having a C-shaped cross-sectional view in spite of a simple structural improvement, and the bolt can be tightened when tightening a nut. It is an object of the present invention to provide a bolt and a nut capable of preventing a friendship beforehand.

[0006]

According to the present invention, there is provided a fastener comprising a bolt and a nut according to the present invention, which is used for a channel member 3 or a structural member 4 having a substantially C-shaped cross section in order to achieve the above object. A tightening tool comprising a bolt (1) having a threaded shaft (1a) and a nut (2) screwed to the bolt (1).
A width direction portion 1c having substantially the same dimension W as the diameter D of the shaft portion 1a, and a diameter D of the shaft portion 1a.
The length L is larger than the inner length L1 of the channel material 3 or the structure material 4 in the longitudinal direction, and the length direction portion 1d is formed. In this case, a measure is taken to have a thickness T smaller than the inner dimension L2.

In the present invention, the head 1b of the bolt 1 is used.
However, it is preferable that both end portions 1e of the length direction portion 1d are formed in parallel, and thus are formed in a rectangular shape in plan view.

Further, in the present invention, the head 1b of the bolt 1 is formed so that both ends 1e of the length direction portion 1d are formed obliquely parallel to each other, thereby forming a rhombus in plan view.
Is preferred.

Further, it is preferable that the head 1b of the bolt 1 is formed in a shape having an arc portion at both ends 1e of the longitudinal portion 1d.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can of course be used as a normal fastening device. It is a fastener developed to eliminate special circumstances. To this end, as shown in FIG. 1 and the like, the head 1b of the bolt 1 has a width direction portion 1c having substantially the same dimension W as the diameter D of the shaft portion 1a, and a diameter D of the shaft portion 1a. The length L is larger than the inner length L1 of the channel material 3 or the structure material 4 in the longitudinal direction, and the length direction portion 1d is formed. It is configured to have a thickness T smaller than the inner dimension L2.

Therefore, for example, when the fixing member 5 is connected to the channel member 3 having a substantially C-shaped cross section, first,
The bolt 1 can be made to enter the inside of the channel material 3 from the narrow head portion 1b through the slit 3a of the channel material 3. After invading the inside of the channel material 3, the shaft 1a of the bolt 1 is rotated to displace the position of the head 1b, and the end of the longitudinal portion 1d is
It comes into contact with both ends inside the channel material 3. In this case, since the lengthwise portion 1d of the bolt 1 is configured to be longer than the longitudinal inner dimension L1 of the channel material 3, the rotation of the bolt 1 causes the end portion of the lengthwise portion 1d to rotate. It stops by contacting both ends inside the channel material 3.

Thereafter, a hole of a predetermined fixing member 5 is passed through a shaft portion 1a of the bolt 1, and a nut 2 is screwed and tightened. The rotation of the nut 2 can be advanced in a state where the head 1b is automatically rotated and fixed, that is, in a state where there is no possibility that the head 1b rotates, and the tightening can be easily performed.

When the head 1b of the bolt 1 has both ends 1e of the lengthwise portion 1d formed in parallel and thus is formed in a rectangular shape in plan view, the rectangular end portion is formed. The edge contacts the inner side wall of the channel member 3 to prevent the bolt 1 from rotating around.

If the head 1b of the bolt 1 has both ends 1e of the lengthwise portion 1d formed obliquely parallel to each other and is formed in a rhombus shape in plan view, the rhombus shape is used. At the sharp edge of the edge of the channel member 3 and bites against the inner side wall of the channel member 3 with strong surface pressure.
Will prevent friendship.

Further, when the head 1b of the bolt 1 is formed in a shape having an arc portion at both ends 1e of the lengthwise portion 1d, the bolt portion 1 is formed in such a state that the arc portion has no biting action. This prevents the bolt 1 from rotating around.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a preferred embodiment of a fastener according to the present invention comprising a bolt and a nut screwed onto the bolt. As shown in FIGS. 1 to 3, here, as the object, a channel material 3 having a substantially C-shaped cross section is used.
Next, a tightening tool including a bolt 1 having a threaded shaft portion 1a and a nut 2 screwed to the bolt 1 will be described. As shown in FIG. 3, the head 1b of the bolt 1 has a diameter D of the shaft 1a.
A width direction portion 1c having substantially the same dimension W, and a length L larger than the diameter D of the shaft portion 1a, and longer than the inner length L1 of the channel material 3 in the longitudinal direction. 1d.

Further, the head 1b of the bolt 1 is configured to have a thickness T smaller than the widthwise inner dimension L2 of the channel member 3, and both ends 1e of the lengthwise portion 1d are formed. It is formed obliquely parallel and thus has a rhombic shape in plan view. FIG. 1 shows a state in which the bolt 1 is inserted into the channel material 3 from the side of the slit opening 3a when viewed from the front (of course, the bolt 1 may be inserted from the upper opening. Bolt 1 to 9
It shows a state in which the nut 2 is rotated within 0 degrees and the nut 2 (normal one) is screwed thereto. With this rotation, even if the nut 2 is rotated by turning the nut 2 with the two ends of the diamond contacting the side walls on the longitudinal side of the channel material 3, the bolt 1 is not rotated. Movement will be blocked. Here, the fixed member assembled to the channel material 3 and fixed by the tightening device is indicated by a virtual line.

Next, as another example of use, FIGS.
As shown in FIG. 1, a structural member 4 having a substantially C-shaped cross section, here, a three-dimensional support member used for supporting a signboard will be described as an example. A substantially C-shaped space similar to that of the channel material 3 is formed in the structural material 4 of the column, and a bolt is set here. Here, as shown in FIG. 8, the head 1b of the bolt 1 has both ends 1e of the lengthwise portion 1d formed in parallel, and thus has a rectangular shape in plan view. FIG. 4 shows a state in which the bolt 1 is inserted into the space of the structural material 4, and FIG. 5 shows a state in which the shaft 1a of the bolt 1 is being rotated. 1b comes into contact with both side walls in the space of the structural material 4. FIG. 5 shows a plan view of a state in which the signboards 5 are connected and fixed to each other with the bolts 1...

The head 1b of the bolt 1 may be formed in an arc shape in addition to the above-described rectangle and rhombus, or
It may be configured in another appropriate shape. In short, the bolt 1
A width direction portion 1c having substantially the same dimension W as the diameter D of the shaft portion 1a, and a diameter D of the shaft portion 1a.
The length L is larger than the inner length L1 of the channel material 3 or the structure material 4 in the longitudinal direction, and the length direction portion 1d is formed. What is necessary is just to be comprised so that it may have thickness T smaller than internal dimension L2.

[0020]

According to the present invention, there is provided a fastener comprising a bolt and a nut which is used for a channel material or a structural material having a substantially C-shaped cross section, wherein the head of the bolt is thin.
Although it is a simple structural improvement with a long shape, the channel material or a structural material having a C-shaped cross section can be easily set from the front opening side (of course also from the upper opening side). By bringing the long bolt head into contact with the inner wall of the channel material or the structural material having a C-shaped cross-section when viewed from the side, a remarkable effect of preventing the bolt from rotating when tightening the nut can be obtained. It has been reached. Other specific advantages of the present invention are as described in detail in the above-described embodiments and examples of the present invention.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing a use state of a fastener comprising a bolt and a nut according to the present invention.

FIG. 2 is a perspective view of a main part showing a use state of a fastener including a bolt and a nut according to the present invention.

FIG. 3 is a perspective view of a bolt of a tightening device comprising a bolt and a nut according to the present invention.

FIG. 4 is a plan view showing one process of another use state of the fastener comprising the bolt and the nut of the present invention.

FIG. 5 is a plan view showing one step of another use state of the fastener comprising the bolt and the nut of the present invention.

FIG. 6 is a plan view showing another state of use of the fastener including the bolt and the nut according to the present invention.

FIG. 7 is a front view showing another state of use of the fastener including the bolt and the nut according to the present invention.

FIG. 8 is a perspective view of a bolt of a tightening device comprising a bolt and a nut according to the present invention.

[Explanation of symbols]

 1 Bolt 1a Shaft 1b Head 1c Width 1d Length 1e Both ends 2 Nut 3 Channel material 4 Structural material D Shaft diameter W Width dimension L Length dimension L1 Channel material or Length dimension of the structural material L2 Length dimension of the channel material or the structural material in the width direction

Claims (4)

[Claims] 1. A tightening device which is used for a channel member 3 or a structural member 4 having a substantially C-shaped cross section and comprises a bolt 1 having a shaft portion 1a threaded and a nut 2 screwed thereto. A width direction portion 1c having a head 1b of the bolt 1 having substantially the same dimension W as the diameter D of the shaft portion 1a; a dimension L larger than the diameter D of the shaft portion 1a; The length T of the channel material 3 or the structural material 4 is longer than the length L1 of the channel material 3 or the structural material 4 and is smaller than the width L of the channel material 3 or the structural material 4. A fastener comprising a bolt and a nut configured to be held. 2. The bolt and nut according to claim 1, wherein the head 1b of the bolt 1 is formed in a rectangular shape in plan view with both end portions 1e of the lengthwise portion 1d formed in parallel. A fastener consisting of 3. The bolt according to claim 1, wherein the head 1b of the bolt 1 is formed so that both end portions 1e of the lengthwise portion 1d are formed obliquely parallel to each other, thereby forming a rhombus in plan view. And a fastener consisting of a nut. 4. A tightening device comprising a bolt and a nut according to claim 1, wherein the head 1b of the bolt 1 is formed in a shape having an arc portion at both ends 1e of the longitudinal portion 1d.