JP2000120619A - Presser fixing jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the displacement of floor plates of a scaffold placed on a scaffold sill with the work from one side of the scaffold by screwing a bolt with a bolt support projected from a clamp body, and providing a presser part at a tip of the bolt. SOLUTION: Presser fixing jigs 1 arranged in each connecting pipe forming a part of a scaffold sill with the predetermined space pinch a connecting pipe while separating a movable upper jaw part 2b and a movable bolt part 2d from each other. The movable bolt part 2d is inserted into the movable upper jaw part 2b, and a fastening nut 2e is screwed so as to pinch the connecting pipe in the fastening condition. On the other hand, a screw grip part 4a of an operating bolt 4 screwed with a bolt support 3 is turned so that a lower surface of a presser part 5 provided at a tip of the bolt 4 abuts on a top surface of a floor plate of the scaffold in the pushing condition. At this stage, since the jig 1 is strongly fixed to the connecting pipe, downward pushing of the presser part 5 is maintained in the constant condition, and the floor plates of the scaffold can be strongly fixed to the scaffold sill.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for holding a plate material against a structure such as a flat body so as not to shift or move away from the structure such as a flat body adjacent thereto. For example, the scaffold floor plate is pressed against the scaffold base so that the upper scaffold floor plate in the working suspension scaffold does not shift or move away from the scaffold base. It is suitably used for fixing.

[0002]

2. Description of the Related Art Conventionally, in the construction and repair work of a structure such as a bridge on a highway, for example, a suspension scaffold for work is generally provided under the structure. Specifically, as shown in FIG.
A scaffold floor plate (33) is placed in parallel on a scaffold base (32) in which the main beams (30) and the cross beams (31) are cross-connected, and at the top of the main beams (30). A connecting pipe (35) is connected to a fixing ring (34) projecting at predetermined intervals.
To form a suspension scaffold, and then lift it with a crane or the like, and suspend it under a structure such as a bridge (38) on a highway with a suspension fitting (37) or the like as shown in FIG. It is fixed down.

[0003]

However, in the above-mentioned conventional suspended scaffold, the scaffold floor plate (33) is provided with a scaffold base (3).
2) Since the main beam (30) is merely placed on the main beam (30), the main beam (30) is likely to shift and move in the axial direction. Therefore, when the worker walks, the shift occurs and the walking becomes unstable or falls. There was a problem that was concerned about doing.

In order to smoothly insert the connecting pipe (35) into the fixing ring (34), a gap must be formed between the scaffold floor plate (33) and the connecting pipe (35). However, since such a gap exists, the scaffold floor plate (33) is apt to rattle in the vertical direction, and there is a problem that the scaffold floor plate (33) rises particularly in a strong wind. In addition, a loud contact sound generated when the scaffold floor plate (33) comes up and comes into contact with the connecting pipe (35) due to a strong wind or the like is often complained as noise pollution around a residential area.

In such a situation, the scaffold floorboard (3)
Although a method of fixing 3) to the lower scaffold base (32) with bolts or the like is also considered, in this case, it is necessary to provide a bolt insertion hole in the scaffold floor plate (33), and the operator needs In addition to the work on the upper side of the scaffold floor plate (33), it is necessary to enter the lower side of the scaffold floor plate (33) on the opposite side and also perform the bolting work, and thus, in a very complicated and labor-intensive manner. For some reason, it has not been adopted yet.

The present invention has been made in view of such a technical background, and a plate material such as a scaffold floor plate placed on a scaffold base in a conventional suspended work scaffold has a plate material adjacent thereto. It is possible to press down and fix to a structure such as a body so that it does not shift or move away from the structure, and at that time it is necessary to work only from one side and excellent work It is an object of the present invention to provide a holding jig capable of securing the property.

[0007]

Means for Solving the Problems In order to achieve the above object, the present inventors have made intensive studies and as a result, have formed a bolt support on a part of a clamp body so that the bolt support can move forward and backward. It has been found that the desired holding fixture can be obtained by screwing the bolts in this state and providing a holding portion at the tip of the bolt.

That is, the holding fixture according to the present invention comprises:
A clamp portion that can be fastened to a shaft such as a pipe, a bolt support that is formed to project in a direction perpendicular to the axis of the clamp portion, and a female screw hole that is provided in the bolt support and that is threadably engaged with a female screw hole. It is characterized by comprising an operation bolt and a holding portion provided at a tip of the operation bolt.

Since the operation bolt having the holding portion at the tip is screwed to the bolt support so as to be able to advance and retreat, the operation bolt is screwed in a state in which the clamp is tightened to a shaft such as a pipe. Thereby, the pressing portion provided at the tip can be brought into contact with the plate material to be fixed in a pressed state, so that the plate material can be pressed and fixed from the shaft body side of the pipe or the like to the opposite side in the structure, As a result, it is possible to prevent the plate member from shifting or moving away from a structure such as a flat body adjacent thereto.

[0010] In addition, when pressing and fixing, the work only needs to be performed from the shaft body side, and no work is required from the opposite side with the plate material to be fixed interposed therebetween. Therefore, the workability when holding down and fixing is excellent.

[0011] It is desirable that the holding portion is rotatably attached to the operation bolt. With such a configuration, even if the operation bolt is screwed, the holding portion itself works in conjunction therewith. Does not rotate, so that when the operation bolt is screwed in, the screwing can be advanced in a state where the pressing portion is in a fixed state (non-rotational state) in contact with the plate material to be fixed. . Therefore, the operation bolt can be screwed without any influence of the rotational frictional resistance between the pressing portion and the plate material to be fixed, so that the force required for screwing and pressing and fixing is very small. The fixing work can be performed extremely smoothly.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a holding fixture according to the present invention will be described with reference to the drawings. In the holding fixture (1) shown in FIG. 1, (2) is a clamp portion, (3) is a bolt support, (4) is an operation bolt,
(5) is a holding part.

The clamp portion (2) is provided with a clamp portion main body (2).
a), a movable upper jaw (2b) whose base end is pivotally connected to one end of a clamp unit main body (2a) by a pivot (10) and is rotatable, and a base end is clamped by a pivot (11). A movable lower jaw (2c) pivotally attached to the other end of (2a) and rotatable, and a base end pivotally attached to the distal end of the movable lower jaw (2c) by a pivot (12). It comprises a movable bolt portion (2d) and a tightening nut (2e) screwed to the movable bolt portion (2d) so as to be able to advance and retreat.

At the tip of the movable upper jaw (2b), there is provided a cutout recess (14) into which the movable bolt (2d) can be loosely inserted, and the movable bolt (2) is inserted into the cutout recess (14).
d) is inserted, and the tightening nut (2e) is screwed into the base end side of the movable bolt (2d), so that the shaft inserted and arranged in the clamp (2) is clamped in a tightened state. It is made to be able to do. Then, the holding fixture (1) and the shaft body are separated by releasing the screwing and tightening by the tightening nut (2e) and moving the upper jaw (2b) and the movable bolt (2).
d) is rotated so as to be separated from each other, and as shown in FIG. 5, a part of the clamp portion (2) is opened so that it can be easily achieved. .

The bolt support (3) comprises a tongue piece (8) and a nut piece (9). The tongue piece (8) is a substantially rectangular plate-like body. (8) is formed on the clamp portion main body (2a) so as to protrude in a direction orthogonal to the axis of the clamp portion. Further, a bolt insertion hole (8a) is provided at the center of the tongue piece (8), and a nut piece (9) having a female screw hole (9a) on the lower surface thereof is integrally joined to form a bolt insertion hole (8a). ) And the female screw hole (9a) communicate with each other. Furthermore, the female screw hole (9
In (a), an operation bolt (4) having a wing nut-shaped screw knob (4a) at one end is screwed forward and backward freely.
The other end of the operation bolt (4) is provided with a rubber member (5
A substantially flat holding part (5) consisting of b) is attached. Then, with the clamp portion (2) fixed to the shaft body by the tightened state, the screw (4a) is turned to screw the operation bolt (4) into the female screw hole (9a) of the bolt support (3). If the pressing part (5) at the tip of the operation bolt (4) is brought into contact with the plate material to be fixed in a pressed state, the plate material to be fixed is a structure such as a flat body on the opposite side. And can be fixed.

In this embodiment, the holding portion (5)
The operating bolt (4) is provided so that it can freely rotate about the axis in a plane perpendicular to the axis of the operating bolt (4).
Attached to. That is, the end of the operation bolt (4) is provided with a support protrusion (4c) slightly protruding from the outer peripheral surface thereof, while the nut (9) is located slightly inside the support protrusion (4c). The upper displacement restricting protruding pieces (4b) having substantially the same size as those described above are attached, and these two pieces (4b) (4c)
A loose fitting concave portion (17) is formed between them. On the other hand, the pressing portion (5) is joined to a pressing base (5a) having a central portion protruding and having a loose fitting hole (18) at the center thereof, and a lower surface of the flat plate portion of the pressing base (5a). Rubber member (5
b), wherein the support projecting piece (4c) is arranged in the play fitting hole (18), that is, the holding base (5a) is inserted into the play fitting recess (17). It is fitted. Due to such a loose fitting state, the holding portion (5)
When the holding part (5) and the plate to be fixed are in contact with each other, the holding part (5) does not turn in conjunction with the screwing of the operation bolt (4), so the holding part (5) is fixed. Screwing can be performed in a state of being abutted against the target plate material in a fixed state (non-rotational state), without being affected by rotational friction resistance between the holding portion (5) and the fixed target plate material. Therefore, the force required to complete the pressing and fixing by screwing is extremely small, and the fixing operation can be performed extremely smoothly. On the other hand, in the configuration in which the operation bolt (4) and the holding portion (5) are joined and integrated, as the operation bolt (4) is screwed, the holding portion (5) and the plate material to be fixed are moved. A rotating frictional force is generated, and the frictional force further increases with the progress of the screwing, which requires a large amount of labor to complete the fixing work, takes a long time, and reduces the working efficiency. It is not preferable.

Next, a specific application example of the holding fixture (1) of the present invention will be described. This embodiment is used when constructing a structure such as a highway bridge, renovation work, etc.
In a hanging scaffold structure provided for work below the structure, a scaffold is mounted so that a scaffold floor plate placed on the scaffold base does not shift or move away from the scaffold base. The holding fixture (1) is used to hold and fix the floorboard to the scaffold base.

That is, as shown in FIG. 6, the main beams (30).
And cross beams (31) ... are cross-connected to form a scaffold base (32)
And corrugated scaffold floorboards (33) are placed in parallel in concave portions formed between adjacent main beams (30) on the upper surface of the scaffold base (32). ing. At the upper part of the main beam (30), fixing rings (34) are formed at predetermined intervals so as to protrude therefrom.
A connecting pipe (35) is inserted and arranged in a plurality of fixing rings (34) adjacent in the width direction of 0).

Then, in this state, the scaffold floor plate (33) shifts and separates from the scaffold base (32), and the like. 1) applies.

That is, the fixing jig (1) is attached to the connecting pipes (35) at predetermined intervals. Specifically, the holding fixture (1) is moved to its movable upper jaw (2).
b) and the movable bolt portion (2d) are separated from each other, and are arranged so as to sandwich the connecting pipe (35).
The movable pipe part (2d) is inserted into the cutout recess (14) at the tip of the movable upper jaw part (2b) and connected, and the tightening nut (2e) is screwed into the connected pipe (3).
5) is clamped in a tightened state. On the other hand, by turning the screw knob (4a) of the operation bolt (4) screwed into the female screw hole (9a) of the bolt support (3), a holding portion (5) provided at the tip thereof. Is pressed against the upper surface of the scaffold floor plate (33) in a pressed state. At this time, since the jig (1) is firmly fixed to the connecting pipe (35) by the tightening of the clamp portion (2), the downward pressing of the pressing portion (5) is maintained in a constant state. The scaffold floorboard (33) is fixed to the scaffold base (32) by a constant pressing force.
Can be fixed firmly. Therefore, the scaffold floorboard (33) shifts with respect to the scaffold base (32),
It is possible to reliably prevent separation (up and down) movement and the like. In addition, since the holding scaffold is fixed firmly as described above, it is possible to prevent the scaffold floor plate (33) from rising even when the suspended scaffold is swung from below by strong wind or the like. On the other hand, the connecting pipe (35) is also pressed against the fixing rings (34)... By the pressing force, so that the connecting pipe (35) may be displaced in its length direction. Thus, a stable construction of the scaffold structure can be achieved.

Further, in the above-described embodiment, as shown in FIG. 7, the holding portion (5) is arranged and pressed in such a manner as to fit into the corrugated recess on the upper surface of the scaffold floor plate (33). Thus, it is possible to more reliably prevent the displacement of the scaffold floor plate (33) in the width direction (the axial direction of the connecting pipe).

The application of the holding jig (1) of the present invention is not particularly limited to the above-described suspended scaffold structure, and the plate material is removed from the shaft such as a pipe in the structure. It can be widely applied to hold down and fix to a structure such as a flat body adjacent to the side.

[0023]

As described above, the holding fixture of the present invention comprises a clamp capable of being fastened to a shaft such as a pipe, and a bolt support projecting in a direction perpendicular to the axis of the clamp. Since there are provided an operating bolt screwed into a female screw hole provided in the bolt support so as to be able to advance and retreat, and a holding portion provided at the tip of the operating bolt, the clamp portion is tightened to the shaft. In this state, the operating bolt is screwed into the bolt support, so that the pressing portion provided at the tip thereof can be brought into contact with the plate material to be fixed in a pressed state. The plate member can be pressed and fixed from the body side to the opposite side, and thus the plate member can be prevented from shifting and separating from a structure such as a flat body adjacent thereto.
Therefore, for example, when applied to a suspended scaffolding structure, the scaffolding floorboard can be prevented from shifting and moving away from the scaffolding base, and the scaffolding floorboard does not rise even in a strong wind. Contact noise can be prevented from occurring, and the connecting pipe can be prevented from shifting in the length direction.

Further, it is not necessary to perform any processing such as drilling a hole on the plate material to be fixed, and the pressing and fixing can be completed by only the work from the shaft body side, that is, from one side of the plate material. Excellent workability.

Further, when the holding portion is rotatably attached to the operation bolt, the holding portion itself is interlocked with the screwing of the operation bolt when the holding portion is in contact with the plate material to be fixed. Does not rotate, so that when the operation bolt is screwed in, the screwing can be advanced in a state where the holding part is in contact with the plate material to be fixed in a fixed state (in a non-rotating state). Therefore, the operation bolt can be screwed without any influence of the rotational frictional resistance between the pressing portion and the plate material to be fixed, so that the force required for screwing and pressing and fixing is very small. As a result, the fixing work can be performed extremely smoothly, and the working efficiency can be further improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a holding fixture according to an embodiment of the present invention in a state where a clamp portion is fastened.

FIG. 2 is a right side view of the same.

FIG. 3 is a bottom view of the same.

FIG. 4 is a sectional view taken along line AA in FIG.

FIG. 5 is a front view showing the holding fixture in a state where a clamp portion is most opened.

FIG. 6 is a partially cutaway perspective view showing a state in which the holding fixture is applied to a suspended scaffold structure.

FIG. 7 is a sectional view taken along line BB in FIG. 6;

FIG. 8 is an explanatory diagram of a suspension scaffold for a bridge on an expressway.

FIG. 9 is a perspective view showing a conventional suspended scaffold structure with a part cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Holding fixture 2 ... Clamp part 3 ... Bolt support 4 ... Operation bolt 5 ... Holding part 9a ... Female screw hole

Claims (2)

[Claims] 1. A clamp capable of being fastened to a shaft such as a pipe, a bolt support protruding in a direction orthogonal to an axis of the clamp, and a female screw hole provided in the bolt support. A holding jig comprising: an operating bolt screwed into the operating bolt; and a holding portion provided at a tip of the operating bolt. 2. The holding fixture according to claim 1, wherein the holding portion is rotatably attached to an operation bolt.