JPH0657957A - Clamp - Google Patents

Abstract

PURPOSE:To freely select an angle of a pendent arm against a clamp body by boring a plurality of through-holes into the circumference of a rotary shaft of the clamp body to conform the pendent arm with one of the through-holes, and fixing an angle changing hole and a freely selected through-hole with a fixed pin. CONSTITUTION:After a structural steel 20 is surely clamped with a fixed screw 5 of a clamp body 4, a fixed pin 10 is inserted into an angle changing hole 9 of a pendent arm 7 loaded to the clamp body 4 through a rotary shaft 6 in a turnable manner and a freely selected through-hole 8. The clamp body 4 and pendent arm 7 are fixed, and a clamp A is turned to rotate steel materials 20 in the required direction by preventing slippage of the fixed pin by a split cotter pin 11 to suspend the pendent arm 7. According to the constitution, directions of the steel materials 20 are freely selected by only selecting a mounting position of the pendent arm 7 properly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp which is convenient for steel frame welding and steel frame erection work, for example.

[0002]

2. Description of the Related Art In a conventional clamp, as shown in FIG. 7, a U-shaped clamp arm (51) is rotatably attached to a U-shaped clamp body (50), and a fixed end of the clamp arm (51) is fixed. (51a)
And a steel frame (6
0) and the suspension end (51b) of the clamp arm (51) is suspended to fix the clamp arm (51) at the fixed end (51b).
Hold the steel frame (60) firmly between a) and the arm (50a), and
It was used for the purpose of inverting (60) or hanging it and moving it to a predetermined place.

However, according to this, as shown in the figure, the clamp body (50) is clamped to the sandwiching portion of the steel frame (60) to be sandwiched.
The opening (52) of the clamp arm must be set to be horizontal, the clamp arm (51) must be pulled up, and the fixed end (51a) of the clamp arm (51) must be clamped. There was a problem that the usage direction of B) was fixed to some extent. Therefore, when welding the steel frame (60), it may be necessary to turn it over depending on the shape of the steel frame (60).
There was a problem that the clamp (B) had to be attached to the steel frame (60) while considering the direction of (51), and the way of using it was limited. In addition, since the steel frame (60) often has a special shape depending on the structure of the building, there is a problem that the application is limited if the clamp (B) is used in a fixed direction as described above. It was desired by welding workers and construction personnel to provide a clamp that does not matter.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional example, and an object thereof is to separate a clamp function and a hanging function so that a clamp can be freely attached. The purpose is to provide a clamp whose usage direction is not restricted.

[0005]

[Means for Solving the Problems] The clamp of the present invention has been made in order to achieve the above-mentioned object. Clamp body (4) formed in a letter shape and the other arm part (3) so that it can approach and separate toward one arm part (2)
The fixing screw (5) screwed to the
A suspension arm (7) rotatably attached at (6) and a plurality of through holes (8a) (8b) (holes formed in the clamp body (4) around the rotary shaft (6). 8c) ..., an angle changing hole (9) perforated in the suspension arm (7) provided so as to match any of the through holes (8), and any of the through holes and the angle changing hole. (9)
And a fixing pin (10) for fixing the suspension arm (7) and the clamp body (4) by inserting the same into the through hole and the angle changing hole (9). And

According to this, the steel frame (20) is securely clamped by the fixing screw (5), the required through hole (8) is selected, and the clamp body (4) is rotated by the rotary shaft (6). Insert the fixing pin (10) into the angle changing hole (9) and the selected through hole (8) of the freely mounted suspension arm (7) and clamp body (4) and suspension arm (7).
After fixing and fixing the retaining pin (10) with the split pin (11), the suspension arm (7) is suspended. As a result, the clamp (A) rotates and the steel material (2
The direction of (0) can be rotated. In this case, steel (20)
In order to change the direction of, the suspension arm (7) can be freely changed by simply selecting the mounting position.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the illustrated embodiments. The clamp body (4) is formed in a substantially U shape by projecting arm portions (2) and (3) from the body member (1) so as to face each other. -A fixing screw (5) is screwed to the other arm (3) so that it can be separated. (5a) is a stopper provided on the inner surface of one arm portion, (5b) is a nut provided on the other arm portion, and a fixing screw (5) is screwed on. The fixing screw (5) is composed of a screw body (5c) and a tip pad (5d), and the spherical projection (5e) at the tip of the screw body (5c) is a spherical recess (5d) of the pad (5d). It is rotatably inserted in 5f). A flat surface (5g) for screwing is formed on the outer end of the screw body (5c).

Further, the clamp body (4) is 2 in this embodiment.
It is composed of a single plate material (4b), and the nut (5b) and the support (4a) are fixed between the plate materials (4b) by various methods such as welding and bolting. Of course, the clamp body (4)
Needless to say, it may be possible to integrally form the product by forging or casting.

The body member (1) of the clamp body (4) has a rotary shaft.
A suspension arm (7) is rotatably attached at (6), and a suspension wire attachment through hole (7a) is formed at the tip of the suspension arm (7). Around the rotating shaft (6), a plurality of through holes (8a) (8
b) (8c) is perforated. In this embodiment, three points are provided so as to form an angle of 90 degrees with respect to the rotation axis (6). (Of course, the number is not limited to this, and needless to say, it may be two or three or more.) The suspension arm (7) has the plurality of through holes (8a) formed in the clamp body (4). ) (8b) (8c)
An angle changing hole (9) is drilled in (7).

In the fixing pin (10), one of the through holes (8) is matched with the angle changing hole (9) so that the through hole (8) and the angle changing hole are matched.
(9) Insert into the suspension arm (7) and clamp body (4)
They are used to fix and, and the split pin (11) can be attached to the end. As shown in FIG. 3, the split pin (11) is inserted and fixed in the fixing hole (10a) of the fixing pin (10). In this case, one arm of the fixing pin (10) is bent, and the bending arm (11a) holds and holds the fixing pin (10).

Then, as shown in FIG. 4, the steel (20) web is
(21) Insert the opening of the clamp (A) from above and fix the fixing screw (5).
Tighten the web (21) at and clamp it against the web (21)
The clamp (A) is fixed to the web (21) so that the opening of (A) is gripped. In the case of this embodiment, the gripping direction of the clamp (A) does not matter. In the case of reversing the steel frame (20), the suspension arm (7) of the clamp (A) is held at a right angle to the opening of the clamp (A), so that the suspension arm (8) at the end is suspended. The angle changing holes (9) of (7) will be matched and used. When moving the steel frame (20),
Usually, a plurality of clamps (A) are fixed to one steel frame (20) so that the inversion directions are opposite to each other. After that, the steel frame (20) is lifted with a crane or the like, inverted, or moved to a predetermined place, the fixing screw (5) is loosened, and the clamp (A) is removed.

Depending on the shape of the steel frame (20), it may be better to make the opening sideways. In such cases,
Remove the split pin (11) attached to the end of the fixed pin (10),
After pulling out the fixing pin (10) from the through hole (8b) in the center and freeing the suspension arm (7) from the clamp body (4),
Align the angle changing hole (9) of the suspension arm (7) with the through hole (8a) or (8c) at the end, and then fix the pin (10) through hole (8a).
Alternatively, insert it into (8c) and the angle changing hole (9), and finally insert the cotter pin.
Attach (11) to the end of the fixing pin (10) and fix. After doing this, as in the case described above, it is suspended by a crane or the like and inverted or transferred.

[0012]

According to the present invention, a suspending arm is attached to a clamp body so as to be rotatable about a rotary shaft, and a plurality of through holes are formed in the clamp main body around the rotary shaft. After the suspension arm is aligned with the hole, the angle changing hole and the through hole are fixed with the fixing pin, so that the angle of the suspension arm can be freely selected with respect to the clamp body. Has the advantage that it can be significantly increased.

Further, since a fixing screw is screwed to the other arm portion of the clamp body formed in a substantially U shape so as to be able to approach and separate toward one arm portion of the clamp body, it is independent of the clamp arm. Thus, the members can be held and fixed, the fixing direction of the clamp arm with respect to the clamp body can be freely selected, and the range of use of the clamp can be greatly expanded.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a clamp of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a front view when the mounting direction of the clamp arm in FIG. 1 is changed to a right angle.

FIG. 4 is a front view showing a mounted state of a clamp according to the present invention.

5 is a front view when the clamp of FIG. 4 is suspended.

FIG. 6 is a front view when the steel frame is inverted by the clamp shown in FIG.

FIG. 7 is a front view of a conventional example.

[Explanation of symbols]

 (A)… Clamp (1)… Body member (2) (3)… Arm part (4)… Clamp body (5)… Fixing screw (6)… Rotating shaft (7)… Hanging arm (8) (8a ) (8b) (8c)… Through hole (9)… Angle changing hole (10)… Fixing pin

Claims (1)

[Claims] 1. A clamp main body formed in a substantially U-shape by projecting arm portions facing each other from a main body member,
A fixing screw screwed to the other arm portion so as to be able to approach and separate toward the one arm portion, and a suspension arm rotatably mounted on the clamp body with a rotation shaft.
A plurality of through holes formed in the clamp body around the rotating shaft, an angle changing hole formed in the hanging arm portion so as to match the through holes, any one of the through holes and the angle changing hole. And a fixing pin for fixing the suspension arm and the clamp body by inserting the same into the through hole and the angle changing hole.