JPH0538093Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention suspends and moves a hanger rail installed on a scaffolding floor assembly using a hanging material with rollers clamped to the flange of an existing material in a structure. This invention relates to a device for attaching hanging materials with rollers to hanger rails in mobile scaffolding.

[Conventional technology]

When inspecting, repairing, painting, etc. behind the girders of bridges and other structures, temporary scaffolding was used to perform the work. Mobile scaffolds have come to be used in which hanging materials are attached and the scaffold is suspended by the hanging materials. There are many types of mobile scaffolding, but one of these is a method in which hanger rails fixed to the scaffolding floor assembly are suspended and movable using rollers installed at the lower ends of multiple hanging materials that clamp the flanges of existing materials. This is a very simple and easy to move scaffold, as it is only necessary to set hanging materials with rollers on the flanges of existing materials when the scaffolding floor assembly is moved.

[The problem that the idea aims to solve]

However, as shown in FIG. The front end of 5 is already attached to the hanger rail 6 and extends from the hanging material 3 with rollers that suspends the scaffolding floor assembly 5.
The front end side of the scaffold floor assembly 5 tends to fall slightly due to its own weight and the weight of the worker. For this reason,
It was difficult to install the roller 4 of the hanging material with the front roller into the hanger rail 6.

The present invention was made to solve this problem, and the roller at the lower end of the hanging material with rollers is clamped to the flange of the existing material.
The object of the present invention is to provide a device for attaching hanging materials with rollers to a moving scaffold hanger rail, which allows the hanger rail of the scaffold floor assembly to be easily attached and the scaffold floor assembly to be moved smoothly. .

[Means to solve the problem]

In order to achieve the above object, in the device for attaching hanging materials with rollers to a moving scaffold hanger rail of the present invention, a lifting guide member 11 is fixed to the end of the hanger rail 6 fixed to the scaffold floor assembly 5,
A hanging member 3 with a roller is attached to the lifting guide member 11.
A roller mounting member 10 for mounting the roller 4 is fitted in such a way that it can be raised and lowered, and a rotation operating lever is attached to a support member 20 fixed to the end of the scaffolding floor assembly 5 or the end of the hanger rail 6, or both. The arm 1 is fitted with a horizontal shaft 23 that is rotated by a shaft 26, and the base end is attached to the horizontal shaft 23.
5 is provided with a long hole 16 extending in the longitudinal direction of the arm, and the elevating operation rod 12 attached to the lower part of the roller mounting member 10 is connected to the long hole 1 of the arm 15.
A reversal prevention device 25 is provided between the horizontal shaft 23 and the support member 20 and is slidably fitted into the support member 6 .

[Effect]

Hanger rail 6 fixed to scaffolding floor assembly 5
is lower than the height of the rollers 4 on the hanging material 3 with rollers to be installed, the scaffold floor assembly with the hanger rail 6 and the installation device 8 is removed with the roller installation member 10 in the raised position. 5 is moved forward to move the roller mounting member 10 to a position where it overlaps the roller 4, and then the arm 15 is rotated by operating the rotation operation lever 26, thereby the lifting operation rod 12 is moved. The roller mounting member 10 is moved downward through the roller mounting member 10 to engage the upper part of the roller 4, and the hanging material 3 with rollers is used as a reaction force supporting member to be fixed to the scaffold floor assembly 5. The hanger rail 6 is raised to a level that matches the rollers 4 of the hanging material 3 with rollers to be installed.

Next, the scaffolding floor assembly 5 to which the hanger rail 6 was fixed
By moving forward, the rollers 4 of the roller-equipped hanging material 3 are inserted and mounted on the hanger rail 6 fixed to the scaffolding floor assembly 5.

Further, since a reverse rotation prevention device 25 is provided between the horizontal shaft 23 and the support member 20, even if the hand is released from the rotation operation lever 26, the arm 15 will not return and rotate, and the roller mounting member 10 is held at a predetermined level relative to the hanger rail 6.

〔Example〕

The invention will now be explained in detail by way of illustrated examples.

Figures 1 to 5 show an embodiment in which the mounting device 8 of the present invention is installed at the end of a hanger rail fixed to a scaffolding floor assembly, and is used in a plurality of parallel girders in a bridge or other structure. Beams 7 extending in the longitudinal direction of the existing materials, that is, the front-back direction, are placed below the existing materials 9 made of wood, and scaffolding boards 18 are erected and fixed across each of the beams 7 to form the scaffolding floor assembly 5. has been done. Further, a plurality of hanger rails 6 each having an upwardly opening groove-shaped cross section and having an inward flange at the upper part are arranged to extend parallel to each other in the front-rear direction at the lower part of each of the existing members 9, and are arranged at the lower part of each of the existing members 9, and The upper end portions of a plurality of connecting members 19 are fixed to , and the lower end portions of the connecting members 19 are connected to the beam member 7 .

The end of the hanger rail 6 is formed into a U-shaped cross section that opens upward by cutting off the inward flange, and a pair of elevation guide members each having an L-shaped cross section are provided on both sides of the end of the hanger rail 6. 1
1 are arranged at intervals in the lengthwise direction of the hanger rail and fixed by welding, and a lifting guide groove 27 extending in the vertical direction is formed by the lifting guide member 11 and the side surface of the hanger rail 6.

A groove-shaped roller receiving part 29 that opens downward is connected to the upper part of the vertical plate 28 to form the roller mounting member 10.
The vertical plates 28 of the roller mounting member 10 are fitted into a pair of vertical guide grooves 27 on both the left and right sides of the hanger rail 6 so as to be able to rise and fall freely, and the roller receiving portion 29 of each roller mounting member 10 is connected to the hanger rail. A connecting member 17 is disposed above the bottom plate 6 and fixed to the lower part of the vertical plate 28 in each roller mounting member 10 by welding,
The elevating and lowering operation rod 12 extending in the left and right direction is connected to the vertical plate 28 and each vertical plate 2 in the left and right roller mounting members 10.
A horizontal shaft 2 provided on the support member 20, which will be described later, is fitted across the spacer pipe 13 interposed between the vertical plates 28 and 28 on the lower rear side of each vertical plate 28.
A notch 30 is provided to prevent interference with 3.

A support member 20 is disposed on both left and right sides of the hanger rail 6 and the beam 7 at a position rearward away from the center of the roller mounting member 10, and the support member 20 is attached to the beam by a fixing member 21 made of a bolt. 7, a horizontal shaft 23 that is fixed to the hanger rail 6 by welding or the like and extends in the left and right direction is connected to the support members 2 on both left and right sides.
Further, spacers 22 are fitted to both ends of the horizontal shaft 23, and the base end of the arm 15 is fitted to each end of the horizontal shaft 23.
Further, nuts 2 are screwed onto both ends of the horizontal shaft 23.
4 is fixed to the arm 15 and the horizontal shaft 23 by welding.

A long hole 16 extending in the longitudinal direction of the arm is provided at the tip side of each arm 15, and both end portions of the lifting operation rod 12, which is inserted across each of the roller mounting members 10, are inserted into the long hole 16 of the arm 15. is,
Also, washers 31 are fitted to both ends of the elevating operating rod 12, and a retaining nut 14 is screwed together, so that the elevating operating rod 12 can slide within the elongated hole 16 in the longitudinal direction of the elongated hole. can. Note that the support member 20
The position of the horizontal shaft 23 that is inserted into the roller mounting member 10 is set at a position where the arm 15 rotates within about 30° from the horizontal state when the roller mounting member 10 moves maximum in the vertical direction from the load transmission start position. It is preferable to

A reversal prevention device 25 consisting of a ratchet mechanism is fitted in a portion of the horizontal shaft 23 between one arm 15 and the spacer 22. A fixed ratchet wheel 33 and a reversal prevention claw piece 34 that is pivotally connected to the support member 20 and engages with the ratchet wheel 33.
and a claw piece 34 and a claw piece engaging spring 35 connected to the support member 20, and one nut 24 attached to the horizontal shaft 23 has a polygonal hole of the rotation operation lever 26. When the roller mounting member 10 is removably fitted and the lever 26 rotates the arm 15 in the downward direction of the arm tip side via the nut 24 to lower the roller mounting member 10, the reverse rotation prevention device 25 prevents the arm 15 from reversing. is,
Therefore, upward movement of the roller mounting member 10 is prevented and the roller mounting member 10 is maintained at a constant level. Further, when the claw piece 34 is removed from the ratchet wheel 33, the reverse rotation prevention function of the reverse rotation prevention device 25 is canceled.

Although any type of lever 26 may be used, it is preferable to use a ratchet trench that can be rotated by repeated rocking.

The hanging material 3 with a roller includes a steel hanging rod, a clamp 2 with a tightening bolt fixed to the upper end thereof,
A plurality of rollers 4 are attached to a roller support member fixed to the lower end of the hanging rod, and a large number of hanging materials 3 with rollers configured in this way are spaced apart from each other in the longitudinal direction of the existing material 9. The flange 1 of the existing material 9 is held by the clamp 2 of the hanging material 3 with rollers, and the hanger rail 6 is supported by the roller 4 of each hanging material 3 with rollers.

Next, using the installation device of the present invention, the scaffold floor assembly 5
The operation sequence when attaching the roller 4 of the roller-equipped hanging material 3 to the hanger rail 6 fixed to the hanger rail 6 will be explained.

First, move the scaffolding floor assembly 5 to just before the roller-equipped hanging material 3 to which it is to be installed, then remove the pawl piece 34 of the reversal prevention device 25 from the ratchet wheel 33, and with the reversal prevention device 25 released, lever 26 By rotating the roller mounting member 10 counterclockwise, the roller mounting member 10 is placed in the raised position as shown by the solid line in FIG. The scaffolding floor assembly 5
move forward.

Next, rotate the operating lever 26 clockwise until the roller 4 faces the upper part of the hanger rail 6, that is, the roller mounting member 10.
The roller mounting member 10 is pulled down relative to the hanger rail 6 until the upper surface plate of the roller receiving portion 29 reaches approximately the same level as the inward flange of the hanger rail 6. In this case, since the rollers 4 of the roller-equipped hanging material 3 do not descend, when the roller mounting member 10 is pulled down relative to the hanger rail 6, the front end side of the hanger rail 6 is moved upward. Further, since the reverse rotation prevention device 25 is activated, the roller mounting member 10 is maintained at a constant level even if the lever 26 is released.

Next, when the scaffolding floor assembly 5 to which the hanger rail 6 is fixed is moved forward, the rollers 4 of the hanging material 3 with rollers are smoothly inserted into the hanger rail 6 and installed.

Note that when the scaffolding floor assembly 5 is moved forward and backward to mount the rollers 4 of the hanging material 3 with rollers into the hanger rail 6, the mounting device of the present invention is attached to the scaffolding floor assembly 5 to which the hanger rail 6 is fixed. It is necessary to provide it on both the front and rear sides.

When implementing the present invention, the support member 20 is
It may be fixed only to the hanger rail 6 instead of being fixed to the hanger rail 6.

[Effect of idea]

Since the present invention is configured as described above, it produces the effects described below.

Hanger rail 6 fixed to scaffolding floor assembly 5
However, even if the height of the rollers 4 on the hanging material 3 with rollers to be installed is lower than the height of the rollers 4, the scaffolding floor with the hanger rail 6 and the installation device 8 may be By moving the set 5 forward, the roller mounting member 10 can be moved to a position where it overlaps the roller 4 without giving any resistance to it, and then by operating the rotation operation lever 26, the arm By rotating the roller mounting member 15, the roller mounting member 10 is moved downward via the lifting operation lever 12 to engage the upper part of the roller 4, and the hanging material 3 with rollers is used as a reaction force supporting member. The hanger rail 6 fixed to the scaffolding floor assembly 5 can be raised to a level that matches the rollers 4 of the hanging material 3 with rollers to be installed, and then the scaffolding floor assembly 5 with the hanger rail 6 fixed is moved forward. As a result, the rollers 4 of the roller-equipped hanging material 3 can be easily inserted into and attached to the hanger rail 6 fixed to the scaffolding floor assembly 5.

Further, since a reverse rotation prevention device 25 is provided between the horizontal shaft 23 and the support member 20, even if the hand is released from the rotation operation lever 26, the arm 15 will not return and rotate, and the roller mounting member 10 can be held at a predetermined level relative to the hanger rail 6.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Fig. 1 is a side view showing a device for attaching hanging materials with rollers to a mobile scaffolding hanger rail, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a sectional view taken along the line B-B in Fig. 1. Figure 4 is a vertical sectional side view showing the reverse rotation prevention device.
Fig. 5 is a schematic side view showing a suspended moving scaffold equipped with the mounting device of the present invention, and Fig. 6 is a side view showing a state in which the rollers of the hanging material with rollers are arranged at the lower part of the roller receiving part of the roller mounting member. , 7th
The figure is a side view showing a state in which the roller mounting member holding the roller has been lowered to a predetermined position relative to the hanger rail. In the figure, 1 is a flange, 2 is a clamp, and 3
is a hanging material with rollers, 4 is a roller, 5 is a scaffolding floor assembly, 6 is a hanger rail, 7 is a beam material, 8 is a mounting device, 9 is an existing material, 10 is a roller mounting member, 11
12 is a lifting guide member, 12 is a lifting operation rod, 15 is an arm, 16 is a long hole, 17 is a connecting member, 20 is a supporting member, 22 is a spacer, 23 is a horizontal shaft, 24 is a nut, 25 is a reverse rotation prevention device, 26 27 is a lever for rotation operation, 27 is a vertical guide groove, 28 is a vertical plate, 29 is a roller receiver, 32 is a key, 33 is a ratchet wheel, 34 is a claw piece for preventing reverse rotation, and 35 is a spring for engaging the claw piece. .

Claims (1)

[Scope of utility model registration request] A lifting guide member 11 is fixed to the end of the hanger rail 6 fixed to the scaffolding floor assembly 5, and a roller mounting member 10 for installing the roller 4 of the hanging material 3 with rollers on the lifting guide member 11.
A horizontal shaft 23 rotated by a rotation operation lever 26 is fitted to a support member 20 fixed to the end of the scaffolding floor assembly 5, the end of the hanger rail 6, or both. and its horizontal axis 23
An elongated hole 16 extending in the longitudinal direction of the arm is provided in the arm 15 whose base end is attached to the arm 15, and the elevating operation rod 12 attached to the lower part of the roller mounting member 10 is inserted into the elongated hole 16 of the arm 15. A device for attaching a hanging material with rollers to a mobile scaffolding hanger rail, which is slidably fitted and is provided with a reversal prevention device 25 between the horizontal shaft 23 and the support member 20.