JP3862503B2 - Main girder upper flange mounting scaffold pipe device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a scaffold pipe device attached to an upper flange of a main girder such as a bridge.
[0002]
[Prior art]
In the construction of bridge work and other work, a slab anchor for connecting the concrete slab and the main girder, or a stud gibber, etc. is installed for the worker to move on the upper flange of the main girder. There was a safety problem. For this reason, a scaffold is attached to the main girder, and a passage is made by passing the scaffolding board.
As a conventional method of attaching a scaffold, there was the following method.
{Circle around (1)} As shown in FIG. 7, a scaffold pipe 1 made of a single pipe is placed on the upper flange 4 of the main girder and tied to the stud gibber 2 with a wire 3. The scaffold board 5 is placed on the scaffold pipe 1.
{Circle around (2)} As shown in FIG. 8, when the upper flange 4 is thin (up to about 32 mm), the scaffold pipe 1 is fixed with a catch clamp 6.
{Circle around (3)} As shown in FIG. 9, the scaffold plate 5 is bound by the wire 3 directly on the stud gibber 2 or the flange anchor.
[0003]
[Problems to be solved by the invention]
However, the conventional scaffold pipe mounting method has the following problems.
In the case of {circle around (1)}: When the single pipe 1 and the stud gibber 2 are bound by the wire 3, they are loosened over a long period of time, so rebinding is necessary.
In the case of (2): In the present situation where the minority main girder is increased, the upper flange 4 is often thick, and there are some that cannot be stopped by the catch clamp 6 that can handle the flange thickness only up to 55 mm. Further, as shown in FIG. 10, the catch clamp 6 has to be looked into the lower side of the flange at a high place and tighten the catch clamp 6. Therefore, a safety problem arises.
In the case of (3): When the scaffold plate 5 is bound to the stud gibber 2 or the slab anchor with the wire 3, there is a problem that the scaffold plate 5 is not stable or loosens for a long time. Further, depending on the flange width, two scaffold plates 5 cannot be installed in parallel.
The object of the present invention is to use the upper part of the main girder so that the scaffold pipe can be fixed to the main girder upper flange only by the work on the main girder flange without using the loosened wire, and the width and thickness of the main girder flange can be accommodated. It is to provide a flange-attached scaffold pipe device.
[0004]
[Means for Solving the Problems]
The present invention for achieving the above object is as follows.
A body consisting of pipes,
A slide material made of a pipe that is slidable on the main body and is fixed to the main body with an insertion bolt and nut at a predetermined insertion position;
A fixing claw that is fixed to the main body, extends obliquely downward, and sandwiches one end in the width direction of the main girder upper flange with the main body,
The sliding member end available stroke attached axially perpendicular direction of the slide member to the extend obliquely downward to the fixing claw side, presses from below width direction end of the main girder on the flange when the raised lifting The presser claw,
A scaffold bolt that is provided to the presser claw, is tightened from above, and lifts the presser claw when tightened;
Main girder upper flange mounting scaffold pipe device.
[0005]
In the above-mentioned main girder upper flange mounting scaffold pipe device of the present invention, the one end in the width direction of the upper flange of the main girder is sandwiched by the fixing claw, and the presser claw is lifted by the scaffolding bolt, and the other end of the upper flange of the main girder is pressed and fixed. The main girder thickness can be accommodated, and the wire is not used for fixing, so that no loosening occurs.
In addition, the fastening bolts are tightened by the work on the flange, so there is no need for the operator to stand up and look under the flange when tightening, as in the case of the conventional catch clamp. Rise.
In addition, the slide material is slid with respect to the main body and set to an appropriate length corresponding to the width of the upper flange, and then the slide material is fixed to the main body. it can.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Below, the main girder upper flange attachment scaffold pipe apparatus of the Example of this invention is demonstrated with reference to FIGS.
The main girder upper flange mounting scaffold pipe device 10 according to the embodiment of the present invention includes a main body (hereinafter referred to as a pipe main body) 11, a slide member 12, a fixed claw 13, and a presser claw 14.
[0007]
The pipe body 11 is made of a pipe, for example, a hollow pipe having a square cross section. Holes 15 are formed so as to penetrate one by one on the side walls facing each other at appropriate portions of the pipe body 11. Of the two opposing side walls in which the holes 15 are formed, the hole 15 on one side wall and the hole 15 on the other side wall are on the same axis.
[0008]
The slide member 12 is slidable in the axial direction with respect to the pipe body 11, and is formed of a pipe having the same shape as the pipe body 11. For example, when the pipe body 11 is formed of a rectangular hollow pipe, the slide member 12 is also formed of a square shape. It consists of a pipe. The outer shape of the slide member 12 has a shape and dimension that can be inserted into the pipe body 11, and the slide member 12 is inserted into the pipe body 11.
A plurality of holes 16 are formed through the side walls of the slide member 12 facing each other. Of the two opposing side walls in which the holes 16 are formed, the hole 16 on one side wall and the hole 16 on the other side wall are on the same axis. The plurality of holes 16 are provided at a predetermined pitch (for example, 50 mm pitch) in the longitudinal direction of the slide member 12. The slide member 12 is inserted into the pipe body 11 to a predetermined insertion position, the shaft cores of the holes 15 and 16 are aligned, the insertion bolts 17 are inserted into the holes 15 and 16, and the threaded portions of the insertion bolts 17 are inserted. By screwing the nut 18, it is fixed to the pipe body 11 so as not to slide. In order to change the insertion length, the insertion bolt 17 and nut 18 are removed, the insertion length of the slide member 12 is changed, and then the insertion bolt 17 and nut 18 are fixed again. Thereby, the slide member 12 is fixed to the pipe body 11 at a predetermined insertion position.
[0009]
As a method of fixing the predetermined insertion position, not only the “insertion bolt / nut” method described above but also other methods may be used. Other methods include
(1) A method of making a dent in the upper part of the slide member 12 and fixing it by pressing a bolt from a nut hole of the pipe body 11;
(2) Create a dent at the top of the slide material, place a spring between the inner diameter of the body and fix it with a knock pen method.
Etc.
[0010]
The fixed claw 13 is fixed to the lower surface of the pipe body 11 by welding or the like. The fixing claw 13 extends obliquely downward toward the presser claw 14 and sandwiches one end in the width direction of the main girder upper flange 4 between the pipe main body 11 when the scaffold pipe 10 is fixed to the main girder upper flange 4.
[0011]
The presser claw 14 is attached to the end of the slide member 12 opposite to the side inserted into the pipe body 11. The presser claw 14 extends obliquely downward toward the fixed claw 13.
The presser claw 14 is attached to the slide material 12 so as to be able to stroke in a direction orthogonal to the axial direction of the slide material 12. The presser claw 14 is lifted in the presser claw stroke direction (a direction orthogonal to the slide direction of the slide material 12) with respect to the slide material 12 by a scaffold bolt 19 tightened from above, and the other end in the width direction of the main girder upper flange 4 ( The main girder upper flange width direction end on the opposite side to the end sandwiched between the fixing claws 13 is pressed from below. A nut 20 is fixed to the presser claw 14 by welding or the like. When the scaffold bolt 19 is screwed into the nut 20 from above and the scaffold bolt 19 is tightened, the presser claw 14 is lifted up and the presser claw 14 is placed on the main girder. The other end in the width direction of the flange 4 is pressed from the lower side. Since the fastening bolt 19 is tightened from above, it is tightened by work from above the upper girder upper flange 4.
A scaffold plate 5 is placed on the pipe main body 11 of the main girder upper flange mounting scaffold pipe device 10 to constitute a work passage.
[0012]
Next, the operation of the main girder upper flange mounting scaffold pipe device 10 according to the embodiment of the present invention will be described.
According to the width of the main girder upper flange 4, the slide member 12 is slid in the pipe body axial direction with respect to the pipe main body 11, and the fixing claw 13 and the presser claw 14 move down both ends in the width direction of the main girder upper flange 4. The slide member 12 is fixed to the pipe body 11 at a position where it can be pressed from or near the position. This fixing is performed by, for example, aligning the holes 15 and 16 and inserting the insertion bolt 17 into the holes 15 and 16. With one end in the width direction of the main girder upper flange 4 sandwiched between the fixing claw 13 and the main body 11, the scaffold bolt 19 is tightened to lift the presser claw 14 with respect to the slide material 12. The scaffold pipe 10 is fixed to the main girder upper flange 4 by pressing the other end in the width direction of the upper flange 4 from below. Next, the scaffold plate 5 is placed and fixed on the scaffold pipe device 10.
[0013]
When the pipe body 11 and the slide member 12 are formed of square pipes, the scaffolding pipe device 10 is attached and fixed to the main girder upper flange 4 so as to be in close contact with the upper surface of the main girder upper flange 4 and stable. The scaffold plate 5 is also desirable because it adheres to the scaffold pipe device 10 and is stable. However, the pipe body 11 and the slide member 12 are not limited to square pipes, and may be round pipes.
Further, since the scaffold pipe device 10 is fixed to the main girder upper flange 4 by the fixing claws 13 and the presser claws 14 and does not use the binding by the number wires, the binding of the number wires does not occur and is reliable in the long term. It becomes fixed.
[0014]
Further, as in the case of a minority main girder, even when the main girder upper flange 4 has a large width and a large thickness, the sliding member 12 is slid with respect to the main body 11 and the claws 13 are extended obliquely downward. 14, and the vertical stroke of the presser claw 14.
In this case, the main body 11 can be slid with a maximum width of 1965 to a minimum width of 1450 mm at a pitch of 50 mm in the axial direction so as to be able to cope with a change in the width of the main girder upper flange 4 of 500 to 850 mm. In addition, the presser pawl 14 can be stroked by 0 to 60 mm in the vertical direction so as to cope with a change of 40 to 120 mm in the thickness of the main girder upper flange 4.
[0015]
In addition, the mounting work can be performed in a comfortable posture on the main girder upper flange 4. In particular, the fastening bolt 19 can be tightened on the main girder upper flange 4 as shown in FIG. 6, and it is necessary to look into the lower side of the main girder flange as in the prior art (FIG. 10). Therefore, the safety of work is improved.
[0016]
【The invention's effect】
According to the main girder upper flange mounting scaffold pipe device of claim 1, since the presser claw can be lifted and fixed by the scaffold bolt, the flange can be fixed and the change in the thickness of the flange can be dealt with, and a wire is attached to the fixing. It is not used and no loosening occurs.
In addition, the fastening bolts are tightened by the work on the flange, so there is no need for the operator to stand up and look under the flange when tightening, as in the case of the conventional catch clamp. Rise.
Moreover, since the slide material is slid with respect to the pipe body and set to an appropriate length corresponding to the upper flange width, the slide material is fixed to the main body, so that the change in the upper flange width can be dealt with.
[Brief description of the drawings]
FIG. 1 is a side view of a main girder upper flange-attached scaffold pipe device installed on a main girder upper flange according to an embodiment of the present invention when the scaffold pipe length is the shortest.
FIG. 2 is a side view of the main girder upper flange-attached scaffold pipe device installed on the main girder upper flange of the embodiment of the present invention when the scaffold pipe length is the longest.
FIG. 3 is a side view of the main girder upper flange mounting scaffold pipe device according to the embodiment of the present invention when the length is the shortest.
FIG. 4 is a side view of the main girder upper flange mounting scaffold pipe device according to the embodiment of the present invention when the length is the longest.
5 is a perspective view of part A in FIG. 4. FIG.
FIG. 6 is a side view of the main girder upper flange mounting scaffold pipe device according to the embodiment of the present invention during the operation of mounting the main girder flange on the main girder flange.
FIG. 7 is a side view of a scaffold pipe attached on a main girder upper flange by a conventional wire-bundling method.
FIG. 8 is a side view of a scaffold pipe mounted on a main girder upper flange by a conventional catch clamp method.
FIG. 9 is a side view of a scaffold plate attached on a stud gibber by a conventional wire-bundling method.
FIG. 10 is a side view of the work in the case where a conventional scaffold pipe is attached onto the main girder upper flange by a catch clamp method.
[Explanation of symbols]
4 Main girder upper flange 10 Main girder upper flange mounting scaffolding pipe device 11 Main body (pipe main body)
12 Slide material 13 Fixing claw 14 Pressing claw 15, 16 Hole 17 Insertion bolt 18 Nut 19 Scaffolding bolt 20 Nut

Claims (1)

A body consisting of pipes,
A slide material made of a pipe that is slidable on the main body and fixed to the main body with an insertion bolt and nut at a predetermined insertion position;
A fixing claw fixed to the main body, extending obliquely downward, and sandwiching one end in the width direction of the main girder upper flange with the main body,
The sliding member end available stroke attached axially perpendicular direction of the slide member to the extend obliquely downward to the fixing claw side, presses from below width direction end of the main girder on the flange when the raised lifting The presser claw,
A scaffold bolt provided to the presser claw, tightened from above, and lifting the presser claw when tightened;
Main girder upper flange mounting scaffold pipe device.

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