JP2001139278A - Steel hanging clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel hanging clamp of new constitution excellent in safety and workability without leaving flaws caused by clamping. SOLUTION: This steel hanging clamp 1 comprises a body plate 10 and a pair of hanging accessories 12, 12 rotatably journalled at both end parts of the body plate 10. The upper part of the body plate 10 is provided with a center hanging hole 11a and at least a pair of hanging holes 11b, 11b on both lateral sides so as to be able to attach/detach hanging hooks 3. Support pin holes 14 that can fit support pins 13 are provided at both end parts of the lower part of the body plate 10, in at least two positions different in a cross direction so as to be able to change a hanging accessory journaling position in conformity to the flange width of steel. Each hanging accessory 12 is rotatably journalled to the body plate 10 by the support pin 13 fitted into any position of the support pin hole 14, and its inner part is provided with a protruding part 12b interfering with the flange upper face of the steel, and a claw part 12a for supporting the flange lower face of the steel. When the clamp 1 is lowered by a crane or the like in conformity to the center of the steel, the hanging accessories 12 are automatically rotated and set into such a manner as to hug the flange of the steel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension clamp for steel used for lifting, moving, reversing, etc., a structural steel used for beams and columns of buildings.

[0002]

2. Description of the Related Art Conventionally, to lift a steel material such as an H-section steel,
There has been work of winding a wire rope directly around a steel material and lifting it with a crane or the like. Although this method is simple, it has a problem in that when it is lifted, the steel material is tilted or rocked and becomes unstable, resulting in danger of falling of the steel material.

[0003] Therefore, a clamp having a substantially U-shaped opening on the side is used, and the steel material is clamped between the lower turning jaw and the upper tooth plate with the end of the steel material inserted into this opening. Lifting has been common practice. With this clamp mechanism, the clamping force increases by the boosting action as the lifting load increases, so the swiveling jaw and tooth plate can bite into the steel material during lifting and prevent falling, but on the other hand, clamp scars on the steel material It is unavoidable that these scratches remain insignificantly, and it is feared that these scratches lower the structural strength and cause brittle fracture, and it is necessary to repair these scars after hanging them at a predetermined place. There was a problem that lowering.

Therefore, as described in Japanese Patent No. 2936221, a pair of pivotally supported pivotally supported ends of the main body in a state in which a steel flange is housed in a concave portion on the lower surface side of the substantially U-shaped clamp main body. Has been proposed in which a substantially L-shaped receiving claw is locked to the back surface of a steel material flange, and the receiving claw is non-rotatably fastened by a locking pin at this position.

[0005]

However, in the above-mentioned prior art clamp, when the receiving claw is locked to the bottom surface of the flange of the steel material, the receiving claw is rotated, and then the locking pin is inserted into the pin hole. Then, it is necessary to perform an operation of holding the receiving claw in the locking position, but all of these operations have to be performed manually, which is a troublesome and dangerous operation.

Further, the flange width of the steel material is variously varied depending on the steel material size. However, the above-mentioned conventional clamp is a dedicated product used for lifting a steel material having a constant flange width, and is not versatile. Clamps having dimensions suitable for steel materials having different flange widths must be prepared, which is inconvenient for the operation and disadvantageous in cost.

Further, since various processes such as cutting, drilling, welding, assembling, and painting are performed on the steel material, it is necessary to invert the steel material in each case. It was necessary to unwind and rewind the wire rope during the processing work, and the workability was poor and it was difficult to handle.

Further, the clamp according to the prior art described above is
It merely supports the flange of the steel material so as to be surrounded by the concave portion on the lower surface side of the clamp body and the pair of receiving claws, and does not have a solution to the problem of the side slip of the steel material. Generally, two clamps are used to lift a long steel material such as an H-shaped steel, and these clamps are respectively connected to tips of the wire ropes, and the wire ropes are lifted by a crane or the like. When the two wire ropes are stretched by lifting, a force acts to move the clamps toward each other in a direction approaching each other. Therefore, when the above-described conventional clamp is used, a side slip occurs in the clamp, and the balance is lost. There was a risk of steel falling.

[0009]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems in the prior art and to provide a hanging clamp for steel having a novel structure which is excellent in safety and workability and does not leave a scratch on the clamp. And

In order to achieve the above object, the present invention according to claim 1 provides a suspension clamp for steel material comprising a main body plate and a pair of hanging metal members rotatably supported at both ends of the main body plate. At the upper part of the main body plate, at least one pair of hanging holes for attaching and detaching the hanging tool are provided at the center and both left and right sides, and at the lower part of the main body plate, the supporting position of the hanging metal fitting can be changed according to the flange width of the steel material. Support pin holes that allow the support pins to be fitted in at least two different positions in the width direction are provided at both ends. On the other hand, each of the hanging fittings is fitted at any position of the support pin holes. It is rotatably supported on the main body plate by a support pin, and a projection that interferes with the upper surface of the flange of the steel material and a claw portion that supports the lower surface of the flange of the steel material are provided inside the support plate. I do.

According to a second aspect of the present invention, in the hanging clamp for a steel material according to the first aspect, a plurality of locking holes are provided in the lower center of the main body plate at positions aligned with the support pin holes at both ends, and the support pins are fitted. It is characterized in that the hanging fitting is closed non-rotatably in a closed state by a positioning pin which can be inserted into and removed from the locking hole at a position corresponding to the mating support pin hole.

According to a third aspect of the present invention, in the hanging clamp for steel material according to the first or second aspect, the support pin has an oval cross-sectional shape, and the support pin holes have the oval cross-sectional shape at both ends. Is a long hole having a rotatable substantially circular portion.

According to a fourth aspect of the present invention, in the hanging clamp for a steel material according to the first or second aspect, the support pin has a circular cross-sectional shape, and the support pin hole can be fitted with the support pin having the circular cross-sectional shape. A plurality of round holes.

According to a fifth aspect of the present invention, in the hanging clamp for steel material according to any one of the first to fourth aspects, a hand cam is rotatably supported on at least one surface of the main body plate so as to be rotatable in a direction substantially orthogonal to the main body plate. By clamping the upper surface of the flange with a hand cam, side slip of the clamp is prevented.

According to a sixth aspect of the present invention, in the hanging clamp for steel material according to any one of the first to fourth aspects, a suspending arm portion extending in a direction substantially orthogonal to the main body plate from both sides of the main body plate is fixed.
When the clamp is tilted with respect to the steel material during lifting, the tip of the suspension arm levers to press down the upper surface of the flange of the steel material, thereby preventing the clamp from skidding.

According to a seventh aspect of the present invention, in the hanging clamp for a steel material according to the sixth aspect, a suspending hole is provided at both ends of the suspending arm so that a suspending tool can be detached therefrom.

According to an eighth aspect of the present invention, in the hanging clamp for steel material according to any one of the first to fourth aspects, a holding cam extending in a direction substantially perpendicular to the main body plate is rotatably supported at the center of the main body plate. When the lifting tool is set in one of the hanging holes provided at both ends of the holding cam and the lift is lifted, the clamp is inclined with respect to the steel material, so that the tip of the other holding hole side of the holding cam is leveraged. By pressing the upper surface of the steel flange, the clamp is prevented from skidding.

According to a ninth aspect of the present invention, in the hanging clamp for a steel material according to the eighth aspect, the pressing cam has a substantially U-shape having both ends bent downward, and the shaft is rotatable at an upper portion of the main body plate. It is characterized by being supported.

A tenth aspect of the present invention is characterized in that a pair of the steel material hanging clamps according to any one of the first to ninth aspects is used, and these are rotatably connected to both ends of a connecting rod having a predetermined length. It is a hanging clamp for steel materials.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a hanging clamp for steel according to an embodiment of the present invention.

As shown in FIG. 3, the clamp 1 is detachably connected to a lower end of a wire rope sling 2 lifted by a crane or the like via a suspension ring 3, and lifts and moves a structural steel material such as an H-section steel 4. , Inversion, etc.

The clamp 1 includes a main body plate 10 and a pair of U-shaped hanging members 12 rotatably supported at both ends thereof. A suspending hole for attaching and detaching the suspending ring 3 is provided at an upper part of the main body plate 10, and a central suspending hole 11a used when lifting and moving the steel material, and a pair of left and right suspending holes used when reversing the steel material. 11b, 11b.

As shown in FIG. 5, each of the hanging members 12 is formed by connecting a pair of side plates 12c, 12c with a connecting member 12d (FIG. 2), and is integrally formed. Is provided, and a projection 12b that interferes with the upper surface of the flange of the H-section steel 4 is provided at a position facing the tip claw 12a. In addition, the hanging bracket 12
In the upper part, the front claw portion 12a and the projection portion 12b
A locking hole 16 into which a later-described insertion / removal pin 17 can be inserted is provided at one end corresponding to the above, and an oval hole 18 having a shape corresponding to the supporting pin 13 having an oval cross section described later is provided at the upper other end. ing.

On the other hand, a pair of long holes 1 are provided on both sides of the main body plate 10.
4, 14 are provided, and a plurality of locking holes 15, 15... Are provided at positions substantially aligned with these elongated holes (see FIG. 4). And the hanging fittings 12 and 12 are elongated holes 1
4 and 14, which are rotatably supported by support pins 13, 13 having an oval cross-sectional shape fitted to one of the substantially circular ends.
The locking holes 15, 1 at positions corresponding to the fitting positions of the support pins.
5 is fixed in a closed state (FIG. 1) by aligning the locking holes 16, 16 of the hanging fittings 12, 12 with the insertion and removal pins 17, 17 for positioning.

In FIG. 1, the support pin 13 is pivotally supported at a position where the support pin 13 is fitted to the outer end of the elongated hole 14 and the support pin 1 is supported for the left suspension metal 12.
3 shows a state in which the support 3 is pivotally supported at a position where the support 3 is fitted to the inner end of the elongated hole 14, but this shows only one usage of the clamp 1. From the state of FIG.
By supporting the support pin 13 at the position where the support pin 13 is moved to the outer end portion of the elongated hole 14, it can be used for lifting a steel material having a wider flange width than the case of FIG. In addition, by supporting the support pin 13 at the position where the support pin 13 is moved to the inner end of the elongated hole 14 from the state of FIG. 1 (see FIG. 3), the flange is more rigid than that of FIG. It can be used for lifting narrow steel materials. That is, by changing the fitting position of the support pins 13, 13 with respect to the elongated holes 14, 14, this configuration example can also be used for lifting a steel material having three types of flange widths. If the number of positions where the support pins 13 and 13 can be taken is increased and the number of the locking holes 15 is increased correspondingly, a clamp which can be used for lifting a steel material having a greater variety of flange widths can be obtained.

The lifting operation of the H-section steel 4 by the clamp 1 will be described below with reference to FIG. 3. FIG. 3A shows that the clamp 1 suspended by the wire rope sling 2 and the suspension ring 3 by the crane is H-shaped. The state where it was located above the flange of steel 4 is shown. From this state, clamp 1 with a crane
Is lowered, the protrusions 12b of the hanging fittings 12
Interference with the upper surface of the flange of the section steel 4 (FIG. 3 (B)), and when the crane is further lowered, the hanging fittings 12, 12 rotate in the direction to close each other, and their tip claws 12a, 12a are automatically turned. It wraps around the flange lower surface side of the H-section steel 4 (FIG. 3 (C)). FIG. 3 (D) shows the hanging fitting 1 in this manner.
In this state, the tip claw portions 12a of the hooks 2 and 12 are completely fitted into the flanges of the H-section steel 4. At this time, the locking holes 16 and 16 of the hanging fittings 12 and 12 are Locking hole 1 of main body plate 10 at position corresponding to fitting position
5 and 15, which are inserted and removed with pins 17 and 17,
17, the hanging fittings 12, 12 are positioned and fixed in a closed state.

The H-section steel 4 can be lifted by hoisting the crane in the state shown in FIG. The claw portions 12a, 12a of the hanging fittings 12, 12 are wide and abut on the lower surface of the flange on a relatively large surface, so that scars are not left on the H-section steel 4 during lifting.

As described above, the clamp 1 can support the left and right suspension fittings 12 at two different positions, and by changing the position of the support, the H-shaped steel having different flange widths can be supported. 4 can also be used for lifting. FIG. 6 shows a procedure for moving the support pin 13 having the oval cross section from one fitting position to the other fitting position in the elongated hole 14. That is, as an example, in order to move the pivotal support position of the right-side hanging member 12 from the outer position to the inner position, the hanging member 12 is rotated in the opening direction from the position of FIG. B).
As a result, the support pin 13 having the oval cross section is in a horizontal state, and can slide in the elongated hole 14, so that the support pin 13 is moved inward (leftward in the drawing) while maintaining the rotation angle of the hanging fitting 12 as it is. Move. Support pin 13
Reaches the inner end of the elongated hole 14 (FIG. 6 (C)), the hanging bracket 12 becomes rotatable about the support pin 13 at that position (FIG. 6 (D)), and FIG. Can be used for lifting the H-section steel 4 in the manner already described with reference to FIG. According to this configuration, since the inside of the elongated hole 14 can be moved while the support pin 13 is mounted, it is possible to cope with a change in the flange width of the H-section steel 4 to be lifted by a simple operation.

By the way, when the clamp 1 is set on the flange of the H-section steel 4 and lifted by a crane as shown in FIG.
Because it is supported by the two tip claws 12a, 12a,
A gap S is formed between the protrusions 12b and 12 and the upper surface of the flange (see FIG. 7). When lifting a long H-section steel, two clamps 1 are used to perform two-point lifting, so that when the wire rope sling 2 is stretched along with the lifting of the crane, the two clamps 1, 1 approach each other. A situation where skidding is about to occur (see FIG. 8).

Therefore, it is preferable that the clamp 1 is provided with a side slip prevention means, an example of which is shown in FIG. The anti-slip means of FIG. 9 is configured as a hand cam 20 rotatably supported by a shaft support hole (no reference numeral) of a support portion 19 extending on one surface of the main body plate 10.
2 is set on the flange of the H-section steel 4 (FIG. 3 (D)), and the clamp 1 is fixed to the H-section steel 4 by manually lowering the hand cam 20 from the virtual line position to the solid line position. . Thereby, when the wire rope sling 2 is stretched, it is possible to prevent the clamps 1 and 1 from sliding sideways in a direction approaching each other, and secure a safe lifting operation (see FIG. 10).

FIGS. 11 to 13 show another example of the structure of the anti-slip means, in which a pair of suspension arms 22, 22 are fixed on both sides of the main body plate 10 at right angles to the center line thereof. The suspension ring 3 is inserted into the central suspension hole 21 of the clamp body 10.
When the wire rope sling 2 is stretched by setting and lifting, the entire clamp 1 is tilted as shown in FIG. 12, and the tip of the inner suspension arm 22 acts as a lever to suppress the flange surface of the H-section steel 4.

That is, assuming that the inclination of the clamp 1 at this time is α1 and the suspension angle is β1, the clamp 1 and the suspension ring 3
Θ1 = β1−α1 between the clamp 1 and the clamp arm 1 and the hanging arm 22 generate coji forces P1 and R1 corresponding to θ1 to clamp the flange surface of the H-section steel 4 from both upper and lower sides. Therefore, the sideslip of the clamp 1 can be prevented.

At the tips of the suspension arms 22, 22, suspension holes 22a for attaching and detaching the suspension ring 3 can be provided.
When the suspension ring 3 is set in one of the suspension holes 22a and lifted, the entire clamp is tilted as shown in FIG. 13 when the wire rope sling 2 is stretched, and similarly, the tip of the inner suspension arm 22 is leveraged. Thus, the flange surface of the H-section steel 4 can be pressed.

In this case, the coji forces P2 and R2 are the values of the clamp 1 when the inclination of the clamp 1 is α2 and the suspension angle is β2.
1 corresponds to the angle θ2 = β2−α2 between
As in the case of No. 2, the flange surface of the H-section steel 4 can be clamped from both upper and lower sides to prevent the clamp 1 from skidding.

In general, the hanging angle is larger (β2> β1) in the case of FIG. 13 using the hanging hole 22a at the tip of the hanging arm than in the case of FIG. 12 using the central hanging hole 21 (β2> β1). If the length of the suspension arm is constant, the inclination of the clamp 1 is constant in both the cases of FIGS. 12 and 13 (α1 = α2), so that generally θ2> θ1, and FIG.
In the case of (1), a greater side slip prevention effect can be obtained. However, by extending the suspension arm, a sufficient anti-skid effect can be obtained even when the central suspension hole 21 is used (FIG. 12). Therefore, it is not essential in the present invention to provide the suspension holes 22a at the tips of the suspension arms 22,22.

FIGS. 14 and 15 show still another example of the structure of the anti-skid means attached to the clamp according to the present invention. The pressing cam 23 which is orthogonal to the center line on both sides of the main body plate 10 is rotated by a pin 24. It is pivotally supported. Suspension holes 23a for attaching and detaching the suspension ring 3 are provided on both sides of the holding cam 23. When the suspension ring 3 is set and lifted in one (outer) suspension hole 23a, the opposite side of the holding cam 23 ( The inner side) can press the upper surface of the flange of the H-section steel 4 to prevent the clamp 1 from skidding.

The shape of the pressing cam 23 does not necessarily have to be an elongated rod shape. As shown in FIGS. 16 and 17, the pressing cam 25 having a substantially U-shape whose both ends are bent downward is attached to the main body plate 10. May be rotatably supported by a pin 26 on the upper part of the head. Suspension holes 25a, 25a for attaching and detaching the suspension ring 3 are provided on both sides of the holding cam 25. When the suspension ring 3 is set in one (outer) suspension hole 25a and lifted,
The upper surface of the flange of the H-section steel 4 can be pressed on the opposite side (inward) of the holding cam 25, and similarly, the sideslip of the clamp 1 can be prevented. In this case, even when the clamp 1 is lifted at a large hanging angle (see angles β1 and β2 in FIGS. 12 and 13), the wire rope sling 2 does not interfere with the clamp body plate 10. .

The embodiment shown in FIG.
When lifting the shaped steel 4, the clamps 1, 1 are used as a pair, and connecting portions 27, 27 are provided on opposing surfaces of the respective clamp body plates 10, 10, and these are rotatably mounted on both ends of the connecting rod 28. It is a concatenation. When the H-section steel 4 is lifted in this state, a fixed interval is secured between the pair of clamps 1 and 1 connected by the connecting rod 28, so that the sideslip of the clamps can be prevented and a stable state is always maintained. And safe lifting work can be performed.

In the clamp 1 described above, the main body plate 1
0 are provided with elongated holes 14 at both ends, and a support pin 13 is fitted into one of the substantially circular ends of each elongated hole 14 to rotatably support the hanging fitting 12. However, instead of the long hole 14, a pair of round holes 29, 29 are provided at both ends of the main body plate 10, and a pull-out pin (not shown) is inserted into one of the round holes 29, 29 so that the hanging metal fitting 12 is formed. It may be pivotally supported, and such a configuration can be similarly adapted to three types of flange widths. When trying to lift the H-section steel 4 having a different flange width, it is only necessary to once pull out the insertion / removal pin and then insert it into the other round hole 29. In this case, the locking hole on the side of the hanging bracket 12 is not an oval hole 18 as shown in FIG.

As described above, the clamp body plate 10 includes not only the central hanging hole 11a but also a pair of left and right hanging holes 11b,
Since the 11b is formed, the H-shaped steel 4 can be turned over by setting and suspending the suspension ring 3 on any of them.

Although the embodiments of the clamp of the present invention have been described in detail with reference to the drawings, the present invention is not limited to these embodiments, and various modifications may be made within the scope described in the claims. Can be taken. For example, although the main body plate 10 has been described as having a single-piece structure, it may have a structure in which a pair of main body plates are integrally connected. In this case, one left and right hanging bracket is rotated between the pair of main body plates. It can be provided freely.

In the illustrated configuration example, three types of flange widths can be accommodated.
An intermediate portion of the main plate is formed with an enlarged portion on which the oval support pin 13 can rotate, or three round holes 29 (FIG. 19) are provided at both left and right end portions of the main body plate. By changing the position and the number of the holes 15, it is possible to correspond to a total of six types of flange widths.

[0043]

According to the hanging clamp for steel material of the present invention,
When the clamp is lowered with a crane or the like to the center of the steel material, the hanging bracket is automatically rotated and set so as to hold the steel flange, eliminating the need for manual setting, making it easier to work and safe. Excellent in nature.

Further, since it is possible to cope with steel materials having a plurality of flange widths by moving the hanging metal fittings and the positioning pins, the working efficiency is high and the cost can be reduced.

Further, the clamp of the present invention does not leave any scars on the steel material after being lifted, so that subsequent repair work becomes unnecessary.

Further, the provision of the anti-slip means secures the clamp immovably with respect to the steel material during lifting and prevents the clamp from skidding, so that the steel material does not fall off from the clamp and can be safely lifted, moved, Reversal work is ensured.

[Brief description of the drawings]

FIG. 1 is a front view showing a hanging clamp for steel according to an embodiment of the present invention.

FIG. 2 is a side view of the clamp.

FIG. 3 is an explanatory diagram showing a time-series operation of lifting an H-section steel performed using the clamp.

FIG. 4 is a front view showing a main body plate of the clamp.

FIG. 5 is a perspective view showing a hanger of the clamp.

FIG. 6 is an explanatory diagram showing, in chronological order, an operation of changing a pivot support position of a hanging bracket in this clamp.

FIG. 7 is a front view showing a state where the H-section steel is lifted by the clamp.

FIG. 8 shows a case where two long H-section steels are formed by using two clamps.
It is explanatory drawing which shows the state at the time of hanging from a point.

FIG. 9 is an explanatory diagram showing an example of a configuration in which a side skid preventing means is added to the clamp.

10 is an explanatory view showing a state where two long H-shaped steel members are hung at two points by using two clamps of FIG. 9;

FIG. 11 is a front view showing a state in which an H-section steel is lifted by a clamp adopting another configuration example of the sideslip prevention means.

FIG. 12 is an explanatory view showing a state in which a suspension ring is set in a suspension hole at the center of the main body plate and suspended at two points in the clamp of FIG. 11;

FIG. 13 is an explanatory view showing a state in which a suspension ring is set at one of suspension holes at both ends of the suspension arm and suspended at two points in the clamp of FIG. 11;

FIG. 14 is a front view showing a state in which an H-section steel is lifted by a clamp employing still another configuration example of the sideslip prevention means.

FIG. 15 is an explanatory diagram showing a state in which a suspension ring is set at one of suspension holes at both ends of the holding cam and suspended at two points in the clamp of FIG. 14;

FIG. 16 is a front view showing a state in which an H-section steel is lifted by a clamp employing still another configuration example of the sideslip prevention means.

FIG. 17 is an explanatory view showing a state in which a suspension ring is set at one of suspension holes at both ends of the holding cam and suspended at two points in the clamp of FIG. 16;

FIG. 18 is an explanatory view showing a state in which a long H-section steel is suspended at two points by an embodiment in which a pair of clamps are connected by a connecting rod.

FIG. 19 is a front view of a clamp body plate showing a modified example in which two round holes on the right and left sides are formed instead of the long holes.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Suspension clamp for steel materials 2 Wire rope sling 3 Suspension ring 10 Main body plate 11a Central suspension hole 11b Left and right suspension holes 12 Suspension fitting 12a Tip claw part 12b Projection part 13 Support pin 14 Long hole 15 Lock hole 16 Lock hole 17 Pull-out pin 18 Oval hole 20 Hand cam 22 Suspended arm 23 Pressing cam 25 Pressing cam 29 Round hole

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Shinichi Shibuya 2-3-12 Tomi Kita, Nara City, Nara Prefecture Inside Eagle Clamp Co., Ltd. (72) Toshihiro Kawashima 2-3-3 Tomio Kita, Nara City, Nara Prefecture No. 12 Inside Eagle Clamp Co., Ltd. (72) Inventor Hatsuo Tsuyama 2-3-12 Tomio Kita, Nara City, Nara Prefecture F-term inside Eagle Clamp Co., Ltd. 3F004 AA08 AB11 AC03 AG10 AH01 EA06 EA26 LA07

Claims (10)

[Claims] 1. A hanging clamp for a steel material comprising a main body plate and a pair of hanging metal members rotatably supported at both ends of the main body plate. At least one pair of holes are provided at the center, left and right sides, and support pins can be fitted at least two different positions in the width direction at the lower part of the main body plate so that the support position of the hanging bracket can be changed according to the flange width of the steel material Each of the hanging members is rotatably supported by the main body plate by the support pin fitted into any position of the support pin hole. A hanging clamp for a steel material, wherein a projection that interferes with the upper surface of the flange of the steel material and a claw portion that supports the lower surface of the flange of the steel material are provided inward thereof. 2. A plurality of locking holes are provided in the lower center of the main body plate at positions aligned with the supporting pin holes at both ends, and locking is performed at a position corresponding to the supporting pin hole into which the supporting pin is fitted. 2. The hanging clamp for steel material according to claim 1, wherein the hanging bracket is closed by a positioning pin which can be inserted into and removed from the hole so that the hanging metal fitting cannot rotate. 3. The method according to claim 1, wherein the support pin has an oval cross section, and the support pin hole is an elongated hole having a rotatable substantially circular portion at both ends of the support pin having the oval cross section. The suspension clamp for steel material according to claim 1 or 2, characterized in that: 4. The support pin according to claim 1, wherein the support pin has a circular cross section, and the support pin hole is a plurality of round holes into which the support pin having the circular cross section can be fitted. 2. The hanging clamp for steel according to 2. 5. A hand cam is rotatably supported on at least one surface of the main body plate in a direction substantially orthogonal to the main body plate, and a side surface of the steel material flange is tightened by the hand cam to prevent the clamp from slipping. The suspension clamp for steel according to any one of claims 1 to 4. 6. A hanging arm portion extending in a direction substantially orthogonal to the main body plate is fixed from both sides of the main body plate, and a tip of the hanging arm portion is leveraged by tilting the clamp with respect to the steel material during lifting. The suspension clamp for steel according to any one of claims 1 to 4, wherein a side surface of the clamp is prevented by pressing the upper surface of the flange. 7. A hanging clamp for steel material according to claim 6, wherein hanging holes are provided at both ends of said hanging arm portion so that hanging members can be detached therefrom. 8. A holding cam extending in a direction substantially perpendicular to the main body plate is rotatably supported at the center of the main body plate, and is hung on one of hanging holes provided at both ends of the holding cam. When the clamp is tilted with respect to the steel material when the fixture is set and lifted, the tip of the other suspension hole side of the holding cam acts as a lever to press the upper surface of the flange of the steel material to prevent the clamp from skidding. The hanging clamp for steel material according to any one of claims 1 to 4, wherein: 9. The holding cam according to claim 8, wherein the pressing cam has a substantially U-shape with both ends bent downward, and is rotatably supported at an upper portion of the main body plate. Hanging clamp for steel. 10. A steel material comprising: a pair of steel material hanging clamps according to claim 1 which are rotatably connected to both ends of a connecting rod having a predetermined length. For hanging clamps.