JP2008111271A - Catch clamp of scaffold fixing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a catch clamp of a scaffold fixing device, which can positively clamp an H-section steel, and can easily and quickly detach the same. <P>SOLUTION: According to the structure of the catch clamp, a pair of clamp bodies 4, 5 having recesses 4A, 5A formed therein, respectively, into which an edge of a flange of the H-section steel as a steel frame of a building is fitted, are mounted on a square columnar flat bar 2 which has an anchor nut 3 fixed to one edge thereof and has a necessary length, such that the recesses 4A, 5A face each other. One 4 of the pairing clamp bodies 4, 5 is fixed to one end of the flat bar 2 and the other one 5 is made movable along a lengthwise direction of the flat bar 2. Further the movable clamp body 5 can be fixed and unfixed to/from predetermined location by an adequate engaging means. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a catch clamp constituting a part of a scaffold fixing device for fixing a scaffold pipe for a working scaffold arranged so as to surround a building to the building at a construction site of the building. Is.

  At the construction site of a building, after assembling a steel frame as a framework of the building, a work scaffold is constructed using iron pipes so as to surround the building. At that time, the scaffold pipe supporting the scaffold is fixed to the steel frame (H-shaped steel) of the building using the scaffold fixing device.

  As shown in FIG. 11, the conventional scaffold locking means includes a catch clamp 100 for gripping an H-shaped steel P, which is a steel frame of a building, an anchor nut 101 fixed to the catch clamp 100, and a screw on the anchor nut 101 at one end. An anchor bolt 102 to be inserted is attached, and a connecting tool 105 to which a continuous bolt 104 attached to a pipe clamp 103 is screwed is installed at the other end.

  The catch clamp 100 has a U-shaped body 100a screwed with a fastening bolt 100b, and the edge of the flange PF of the H-shaped steel P is connected to the tip of the fastening bolt 100b and the lower side of the U-shaped body 100a. It is made to pinch and stop between the overhang | projection part 100c.

  The conventional catch clamp 100 is tightened because the tightening bolt 100b is easily loosened when vibrations or shocks of the scaffold are repeatedly transmitted, and the edge of the flange PF of the H-shaped steel is simply picked. The force is weak, and especially when it is raining, the frictional resistance is reduced by the ingress of water, and it becomes more slippery. For this reason, there has been a problem that even a slight impact tends to come off.

  The present invention has been made in view of the above points, and by interposing and engaging the H-shaped steel from the left and right sides, and securely holding the engaged state, all the conventional problems are solved, The present invention provides a catch clamp that can be easily and quickly removed from the H-shaped steel after completion of construction.

  The gist of the present invention is a catch clamp of a scaffold fixing device comprising a catch clamp for gripping an H-shaped steel constituting a building, and a connector for connecting the catch clamp and the scaffold. A pair of clamp bodies provided with a recess for engaging the flange of the H-shaped steel is attached to a flat bar to which an anchor nut for attaching a tool is fixed, with the recess facing each other, and one of the pair of clamp bodies The fixed clamp body is fixed to one end side of the flat bar, and the other movable clamp body is movable along the length direction of the flat bar and can be locked at a predetermined position of the flat bar by the locking means. It is a catch clamp of a scaffold fixing device.

  Further, the gist of the present invention is that the fixed clamp body and the movable clamp body are constituted by a set of two clamp plates of the same shape and the same size sandwiching a flat bar, and the locking means of the movable clamp body, An inclined surface is formed at an appropriate position on the lower surface of the flat bar by making a cut with a triangular cross section so as to become deeper toward the fixed clamp body side, while a sickle-shaped clamp is formed between the upper parts of the clamp plates constituting the movable clamp body. Attaching the attached body in a vertically rotatable manner, and attaching a pressing stand that is in sliding contact with the inclined surface formed on the lower surface of the flat bar, between the lower portions of the clamp plate, and further, in the central portion of the clamp plate, That is, it is configured by attaching a block for fixing the tip of the sickle-shaped fastening body to the flat bar.

  Also, the gist of the present invention is that a long hole is formed in the base of the sickle-shaped fastening body, and a shaft spanned between the upper parts of the clamp plates constituting the movable clamp body is inserted into the long hole. By doing so, the sickle-shaped fastening body is pivotally attached so as to be rotatable in the vertical direction.

  Further, the gist of the present invention is that the fixed clamp body and the movable clamp body are constituted by a set of two clamp plates of the same shape and the same size sandwiching a flat bar, and the locking means of the movable clamp body, While forming a continuous arc-shaped recess at an appropriate position on the lower surface of the flat bar, a nut is fixed between the upper parts of the clamp plates constituting the movable clamp body, and a tightening bolt is attached to the nut so as to be able to advance and retract in the vertical direction. In addition, a pin that engages with a recess formed in the flat bar is attached between the lower portions of the clamp plates.

  Further, the gist of the present invention is that the fixed clamp body is composed of a pair of clamp plates of the same shape and the same size sandwiching a flat bar, and the movable clamp body is loosely inserted into the center portion of the flat bar. A projecting portion parallel to the flat bar is formed at the upper and lower end portions of the block in which the hole is formed, and the locking means of the movable clamp body is arranged vertically on the projecting portion on the upper side of the movable clamp body. This is because it is configured by attaching a fastening bolt that advances and retreats.

  The present invention is configured as described above. According to the first aspect of the present invention, the H-shaped steel constituting the building is sandwiched and engaged by the clamp body from the left and right, and the engagement state is reliably maintained. In addition, a strong engagement force can be exhibited. Therefore, the engagement state is firmly maintained against vibrations and shocks of the scaffold, so the catch clamp does not come off from the H-section steel, and the scaffold can be securely fixed and safe construction can be performed. Produces effects such as easy and quick removal from the H-section steel.

  According to the second aspect of the present invention, since the locking means of the movable clamp body is constituted by the sickle-shaped fastening body and the pressing stand, etc., it is easy to rotate the sickle-shaped fastening body in the vertical direction. By the method, the movable clamp body can be fixed to the flat bar quickly and reliably.

According to the third aspect of the present invention, since the shaft of the movable clamp body is inserted into the long hole formed in the base portion of the sickle-shaped fastening body, even if force is applied to the movable clamp body by vibration or the like. By moving the shaft through the long hole, the impact is not directly transmitted to the tightening body, and the shaft or the like is not damaged.
In other words, the long hole plays a role in absorbing vibrations and shocks applied to the movable clamp and tightening body, so the tip of the tightening body is always securely fixed between the flat bar and the block, and the sickle-shaped tightening body. Can be maintained.

  According to the fourth aspect of the present invention, since the locking means of the movable clamp body is constituted by a fastening bolt and a pin or the like, the flange of the H-shaped steel is formed by using a fastening bolt that is simple in configuration and easy to adjust. It can be securely fixed to the flat bar.

  According to the invention described in claim 5, since the locking means of the movable clamp body is constituted by the overhang portions provided at the upper and lower end portions of the block in which the tightening bolt and the slow insertion hole of the flat bar are formed, By tightening a simple tightening bolt, the flange of the H-shaped steel can be securely fixed to the flat bar by the frictional force of the flat bar and the lower surface of the overhanging part and the loose insertion hole.

In the best mode for carrying out the present invention, the edge of a flange of an H-shaped steel, which is a steel frame of a building, enters a prismatic flat bar having a required length, with an anchor nut fixed to the end. A pair of clamp bodies provided with engaging recesses are attached so that the recesses face each other.
One fixed clamp body of the pair of clamp bodies is fixed to one end side of the flat bar, and the other movable clamp body is movable along the length direction of the flat bar. The object is to be locked at a predetermined position by the locking means and to be easily unlocked.

Examples of the present invention will be described below.
1 is a perspective view of a catch clamp according to a first embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a plan view thereof.

In the figure, reference numeral 1 denotes a catch clamp in the scaffold fixing device. Since the scaffold fixing device is the same as the conventional one except for the catch clamp, detailed description is omitted.
The catch clamp 1 is attached to a prismatic flat bar 2 having a required length, to which an anchor nut 3 is fixed at one end, with a pair of clamp bodies 4 and 5 facing the concave portions 4A and 5A. The clamp bodies 4, 5 have the same shape and the same size sandwiching the flat bar 2, and a set of two clamp plates 41, 42, 51 provided with recesses 4A, 5A with which the edges of the flange PF of the H-shaped steel P are engaged. , 52.
One fixed clamp body 4 of the pair of clamp bodies 4 and 5 is fixed to one end side of the flat bar 2, and the other movable clamp body 5 is movable along the length direction of the flat bar 2. The movable clamp body 5 is locked and fixed at a predetermined position on the base rod 2 by locking means, and the locked state can be easily released.

The locking means of the movable clamp body 5 will be described.
As shown in FIG. 1 and FIG. 2, the inclined surface 2 </ b> A is formed by making a cut with a triangular cross section at an appropriate position on the lower surface of the flat bar 2 on the side opposite to the fixed clamp body 4 so that the fixed clamp body 4 side becomes deep. 2A is formed.
On the other hand, a sickle-shaped fastening body 6 is pivotally attached to the upper part of clamp plates 51 and 52 constituting the movable clamp body 5 by a shaft 7 so as to be rotatable in the vertical direction. And the press stand 8 which has the inclined surface 8a which slides in contact with inclined surface 2A, 2A formed in the lower surface of the said flat bar 2 between the lower parts of the clamp plates 51 and 52 is attached.
Further, a block 9 is attached at an appropriate position in the upper central part of the clamp plates 51 and 52 when the tip 6a of the sickle-shaped fastening body 6 bites into the flat bar 2.

A long hole 5B is formed in the base portion of the sickle-shaped tightening body 6, and a shaft 7 spanning between upper portions of the clamp plates 51 and 52 of the movable clamp body 5 is inserted into the long hole 5B.
As a result, even if a force due to vibration or the like is applied to the movable clamp body 5, the shaft 7 moves slightly in the elongated hole 5B, so that the impact is not directly transmitted to the sickle-shaped tightening body 6. Further, it is possible to prevent the sickle-shaped fastening body 6 or the movable clamp body 5 from being damaged.
In other words, the long hole 5B serves to absorb vibrations and shocks applied to the movable clamp body 5 and the tightening body 6, so that the tip of the sickle-shaped tightening body 6 is always securely between the flat bar 2 and the block 9. The sickle-shaped fastening body 6 can be kept firmly locked. In addition, even if an impact is applied to the sickle-shaped fastening body 6, the same effect as described above is achieved.
Reference numeral 10 denotes a reinforcing block provided between the central portions near the upper portions of the clamp plates 51 and 52.

Next, the operation of this embodiment will be described.
When clamping the H-section steel P, as shown in FIG. 1, the fastening body 6 is lifted upward and the movable clamp body 5 is tilted in the direction opposite to the fixed clamp body 4 in the length direction of the flat bar 2. Move along. Then, as shown in FIG. 2, the movable clamp body 5 is fixed to the fixed clamp body 4 until the edges of both flanges PF of the H-section steel P enter the recesses 4A and 5A of the clamp plates 41, 42, 51 and 52, respectively. The H-section steel P is sandwiched from both sides and engaged between them.
After the engagement, the fastening body 6 is rotated downward and an impact is applied using an appropriate tool. As a result, as shown in FIG. 2, the tip 6a of the tightening body 6 contacts the block 9 at the point X and contacts the flat bar 2 at the point Y. At the same time, the inclined surface 8a of the pressing table 8 and the inclined surface of the flat bar 2 The contact surface Z with 2A comes into strong contact with each other, and the movable clamp body 5 is firmly fixed to the flat bar 2.
In the above, when a force is applied from the direction of arrow M (to the right in FIG. 2) in FIG. 1, the flat bar 2 is applied by the engagement force generated by the frictional force generated at the three points of the X point, the Y point, and the Z point. Does not move, and the engaged state with the movable clamp body 5 is maintained.
Further, when the work is finished and the movable clamp body 5 is released, an appropriate tool may be inserted into the gap S between the bent portion of the tightening body 6 and the movable clamp body 5, thereby releasing it easily and quickly. It can be done.

Next, a second embodiment of the present invention shown in FIGS. 4 to 7 will be described.
The present embodiment and the first embodiment are identical in the configuration of the clamp body, and are different in terms of the locking means of the movable clamp body. The same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the present embodiment, a set of two clamp bodies 4 and 5 provided with recesses 4A and 5A in which the edges of the flange PF of the same shape, the same size, and the H-shaped steel P sandwich the flat bar 2 are engaged. The clamp plates 41, 42, 51, 52 are configured.

The locking means of the movable clamp body 5 of the present embodiment will be described.
This locking means forms arc-shaped concave portions 11, 11,... Continuous in the length direction of the flat bar 2 at appropriate positions on the lower surface of the flat bar 2 on the side opposite to the fixed clamp body 4, The nut 12 is fixed between the upper portions of the clamp plates 51 and 52 constituting the fixed clamp body 4, and the tightening bolt 13 is screwed into the nut 12 so as to advance and retract in the vertical direction. Further, a plurality of pins 14, 14 entering the recesses 11, 11,... Formed in the flat bar 2 are attached in parallel between the lower portions of the clamp plates 51, 52.

Next, the operation of this embodiment will be described.
When clamping the H-shaped steel P, the movable clamp body 5 is moved along the length direction of the flat bar 2. Then, the movable clamp body 5 is brought close to the fixed clamp body 4 until the edges of both flanges PF of the H-shaped steel P enter and engage with the recesses 4A and 5A of the respective clamp plates 41, 42, 51 and 52, respectively. The H-shaped steel P is engaged between the two so as to be sandwiched from the left and right.
Thereafter, the tightening bolt 13 is turned and screwed. When the tip of the fastening bolt 13 comes into contact with the flange PF of the H-shaped steel P, the movable clamp body 5 is pulled upward by further screwing, and its pins 14 and 14 are inserted into the recesses 11 and 11 of the flat bar 2. Mating. By further tightening the tightening bolt 13, the movable clamp body 5 is firmly locked to the flat bar 2 while the flange PF of the H-section steel P is strongly pressed against the upper surface of the flat bar 2 by the tightening bolt 13. It is done.

Next, a third embodiment of the present invention shown in FIGS. 8 to 10 will be described.
This embodiment is different from the first embodiment in the configuration of the movable clamp body and the locking means of the movable clamp body. The same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

In the present embodiment, a set of two clamp plates 41 provided with a recessed portion 4A in which the edge of the flange PF of the H-shaped steel P enters and engages the fixed clamp body 4 with the flat bar 2 interposed therebetween. , 42.
The other movable clamp body 5 is constituted by a block 15 in which a slow insertion hole 15a for inserting the flat bar 2 is formed at the center. An upper overhang 16 and a lower overhang 17 that are parallel to the flat bar 2 are formed on the upper and lower ends of the block 15 toward the fixed clamp body 4 and are perpendicular to the upper overhang 16. The fastening means of the movable clamp body 5 is configured by screwing the tightening bolt 18 that advances and retracts.

Next, the operation of this embodiment will be described.
When clamping the H-shaped steel P, the movable clamp body 5 is moved along the length direction of the flat bar 2. The movable clamp body 5 is fixedly clamped until the edges of both flanges PF of the H-shaped steel P enter the gap between the clamp plates 41 and 42 and the overhanging portion 16 on the movable clamp body 5 and the flat bar 2 respectively. Close to the body 4, the H-shaped steel P is engaged between the two so as to be sandwiched from the left and right.
Thereafter, the tightening bolt 18 is turned and screwed. When the tip of the clamping bolt 18 comes into contact with the flange of the H-shaped steel P, the movable clamp body 5 is attracted upward by further screwing, and the lower surface of the loose insertion hole 15a of the movable clamp body 5 and the lower overhang are formed. The part 17 is in contact with the lower surface of the flat bar 2.
By further tightening, the movable clamp body 5 is firmly fixed to the flat bar 2 in a state where the flange PF of the H-shaped steel P is strongly pressed against the upper surface of the flat bar 2 by the tightening bolts 18.
Thus, according to the present embodiment, the tightening bolt 18 and the flange PF, the flange PF and the upper surface of the flat bar 2, the lower surface of the flat bar 2, the upper surface of the lower overhanging portion 17, and the lower surface of the slow insertion hole 15a. A stable engagement state is maintained by the frictional force generated in each case.

The perspective view of the catch clamp of 1st Example of this invention The front view of the catch clamp of 1st Example of this invention The top view of the catch clamp of 1st Example of this invention The perspective view of the catch clamp of 2nd Example of this invention The front view of the catch clamp of 2nd Example of this invention Side view of the catch clamp of the second embodiment of the present invention The top view of the catch clamp of 2nd Example of this invention The front view of the catch clamp of 3rd Example of this invention Side view of the catch clamp of the third embodiment of the present invention The top view of the catch clamp of 3rd Example of this invention Illustration of a conventional scaffold fixing device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Catch clamp 2 Flat bar 2A Inclined surface of flat bar 3 Anchor nut 4 Fixed clamp body 5 Movable clamp body 4A Recess 5A Recess 5B Long hole 41 Clamp plate 42 Clamp plate 51 Clamp plate 52 Clamp plate 6 Sickle-shaped tightening body 7 Sickle-shaped clamping body shaft 8 Press base 8a Inclined surface of press base 9 Block 11 Arc-shaped recess 12 Nut 13 Tightening bolt 14 Pin 15 Block 15a Slow insertion hole 16 Overhang portion 17 Overhang portion 18 Tightening bolt

Claims (5)

In a catch clamp of a scaffold fixing device comprising a catch clamp that grips an H-shaped steel that constitutes a building, and a connector that connects the catch clamp and the scaffold,
A pair of clamp bodies provided with a recess for engaging the flange of the H-shaped steel is attached to a flat bar fixed with an anchor nut for attaching the connector to the end so that the recess faces each other. One fixed clamp body of the clamp body is fixed to one end side of the flat bar, and the other movable clamp body is movable along the length direction of the flat bar. The catch clamp of the anchorage fixing device that can be locked. The fixed clamp body and the movable clamp body are composed of a set of two clamp plates of the same shape and the same size sandwiching a flat bar,
The movable clamp body is configured to form an inclined surface by making the movable clamp body locking means into an appropriate position on the lower surface of the flat bar so as to be deeper toward the fixed clamp body side so as to form an inclined surface. A sickle-shaped tightening body is pivotally mounted between the upper part of the clamp plate so as to be rotatable in the vertical direction, and a pressing stand that is in sliding contact with the inclined surface formed on the lower surface of the flat bar is attached between the lower part of the clamp plate. Furthermore, the catch clamp of the scaffold fixing device of Claim 1 comprised by attaching the block which fixes the front-end | tip of the said sickle-shaped fastening body between flat bars to the center part of a clamp plate.   By forming a long hole in the base of the sickle-shaped tightening body and inserting a shaft spanned between the upper portions of the clamp plates constituting the movable clamp body into the long hole, a sickle-shaped tightening body The catch clamp of the scaffold fixing device according to claim 2, wherein the shaft is pivotally mounted so as to be freely rotatable in the vertical direction. The fixed clamp body and the movable clamp body are composed of a set of two clamp plates of the same shape and the same size sandwiching a flat bar,
The locking means of the movable clamp body is formed with an arc-shaped recess continuous at an appropriate position on the lower surface of the flat bar, and a nut is fixed between the upper portions of the clamp plates constituting the movable clamp body and tightened to the nut. The catch clamp in the scaffold fixing device according to claim 1, wherein the attached bolt is attached so as to be movable back and forth in the vertical direction, and a pin that engages with a recess formed in the flat bar is attached between the lower portions of the clamp plate. The fixed clamp body is composed of a pair of clamp plates of the same shape and the same size sandwiching a flat bar,
The movable clamp body is formed by forming overhang portions parallel to the flat bar at the upper and lower end portions of the block in which a flat insertion hole for the flat bar is formed in the center portion,
The catch clamp in the scaffold fixing device according to claim 1, wherein the locking means of the movable clamp body is configured by attaching a fastening bolt that advances and retreats in the vertical direction to an overhang portion on the upper side of the movable clamp body.

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