JPH0211547Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a simple scaffolding that can be easily attached to and removed from a pile when working on a pile formed by vertically erecting shaped steel such as H-shaped steel.

(Prior art) Work such as cutting the tops of the piles and aligning the heights of the piles is often performed on metal piles driven into the ground as foundations or pillars in civil engineering construction, but scaffolding is required for this work. Become. Conventionally, ladders or stepladders have been used, or angle materials have been temporarily attached by welding or a vise, and scaffolding boards have been placed on top of these.

(Problems to be solved by the present invention) However, ladders and stepladders have a limited height and lack stability.

Mounting scaffolding boards by temporarily attaching angle members by welding or using a vise was time-consuming and caused problems such as poor work efficiency.

(Means for solving the problem) The claw pieces 4, 4 are attached to both ends of the main rod 3 toward the sides, respectively.
A is provided protrudingly provided, and a footrest 6 is also provided protruding outward from the proximal claw piece 4a, and an auxiliary footrest 6 of approximately equal length to the spacing between the claw pieces 4, 4a of the main rod 3 is provided at the proximal end of the main rod 3. The base end of the rod 5 is pivotally supported, and a claw piece 4b is provided to protrude laterally from the free end of the auxiliary rod 5.

(Function and effect) Turn the free end of the auxiliary rod 5 diagonally downward, hook the claw piece 4b onto the corner of the stake 1, and then turn the main rod 3 so that its tip is facing upward. Hook the two claw pieces 4, 4a of No. 3 onto the corners of the stake 1. As a result, the auxiliary rod 5 and the main rod 3 are hooked to the side surface of the pile 1 in a horizontal V-shape.

A force is applied to the main rod 3 to rotate the tip of the main rod 3 upward around the proximal claw piece 4a due to the weight of the footrest 6 at the base end and the auxiliary rod 5 pivotally supported at the base end. do. Once the claw piece 4 at the tip of the main rod 3 gets caught in the corner of the pile 1, the upward rotation of the main rod 3 stops, and the engagement between the claw piece 4 and the pile 1 becomes even stronger, and the scaffold is dug into the pile 1. It won't stop or fall off. When the worker places his or her feet on the footrest 6 and puts his or her weight on the scaffolding, the claw pieces 4 and the stakes 1 are more strongly engaged, and the scaffolding becomes as stable as one welded to a stake. Attach to.

In addition, even if a downward force is applied to the tip of the main rod 3 due to some external force while working on a scaffold, the main rod 3
The auxiliary rod 5, which is pivotally supported at the base end of the auxiliary rod 5, is in a state in which the base end and the claw piece 4b at the tip are extending the pile. The position of the claw piece 4a is prevented from shifting, and the scaffolding is prevented from wobbling or slipping down.

If the tip of the main rod 3 is turned downward and the free end of the auxiliary rod 5 is rotated upward at the same time to close the space between the main rod 3 and the auxiliary rod 5 and to bring both rods 3 and 5 into a substantially horizontal state, Each claw piece 4, 4a, 4b is disengaged from the stake 1, and the scaffold can be easily removed.

(Example) Fig. 1 shows a state in which scaffolds 2, 2 according to the present invention are attached to both sides of a pile 1 on which H-shaped steel is driven, and a worker is working on the scaffolds 2.

The scaffolding 2 has a main rod 3 equipped with a footrest 6 and an auxiliary rod 5.
It is composed of the following:

The main rod 3 is made of angle material and is slightly longer than the width W of the pile 1, and has a pair of claws on the side surfaces of both ends that have notches 41 into which the corners of the pile 1, in the embodiment, the thickness of the pile can be inserted. Pieces 4, 4a are provided protrudingly.

The notch 41 gradually narrows at the back as shown in FIG. 4, and the width 42 at the back is slightly smaller than the thickness 11 of the corner of the stake 1.

When the main rod 3 is tilted and both claw pieces 4, 4a are caught in the corners of the pile 1, the main rod 3 is approximately
Tilt 30 degrees.

An extension piece 31 is protruded from the base end of the main rod 3 at an angle of about 150 degrees with the main rod 3, and a rectangular frame 61 is formed on the side of the extension piece 31.
A lath 62 is stretched over the top to form a footrest 6.

The main rod 3 can be rotated in a vertical plane at the base end of the main rod 3.
One end of an auxiliary rod 5 having approximately the same length as the main rod 3 is pivotally supported, and a claw piece 4b similar to the claw piece 4 of the main rod 3 is provided protruding from the free end of the auxiliary rod 5.

In the embodiment, a footrest 6a similar to the footrest 6 of the main rod 3 is also protruded from the free end of the auxiliary rod 5.

Therefore, the main rod 3 and the auxiliary rod 5 are closed around the pivot 20, placed in a horizontal state and placed against the side of the pile 1, and the tip of the main rod 3 is moved upward, centering on the pivot 20, and the auxiliary rod 5 is closed.
Rotate the footrest 6 downward.

As a result, the claw pieces 4, 4a at both ends of the main rod 3 and the claw piece 4b of the auxiliary rod 5 engage with the corners of the stake 1.

The weight of the footrest 6 and the auxiliary rod 5 acts on the base end of the main rod 3, and an upward rotational force acts on the tip of the main rod 3 centering on the claw piece 4a at the base end. However, the claw piece 4 at the tip of the main rod 3 is hooked on the corner of the stake 1, and the upward rotation of the main rod 3 is prevented, and the engagement between the claw piece 4 and the pile 1 is further strengthened.

Further, the weight of the footrest 6a acts on the tip of the auxiliary rod 5, and a force is applied to rotate the base end of the auxiliary rod 5 upward around the claw piece 4b at the tip. It is pivotally connected to the main rod 3, and upward rotation of the base end is prevented. Therefore, the scaffold 2 will not slip off the pile even when the weight of the worker is not acting on it.

When the worker's feet are placed on the footrest 6, the engagement between the nail pieces 4, 4a, 4b and the stake 1 becomes stronger for the reason described above, and the scaffolding does not slide down. In particular, if the width is smaller than the corner of the stake 1 behind the notch 41 of the claw piece 4 as in the embodiment, the corner of the stake may dig into the notch 41 and the footrest 6 may wobble from side to side. do not have.

Footrests 6, 61 for the main rod 3 and auxiliary rod 5, respectively
Lower the free end of the main rod 3 by lifting it up.
When the free end of the auxiliary rod 5 is rotated upward, each claw piece 4, 4a, 4b is disengaged from the stake 1, and the scaffold 2 can be easily removed.

If a footrest 6a is provided protrudingly from the auxiliary rod 5 as in the embodiment, it is convenient because the pile 3 can be held between the legs and work can be done from both sides.

As shown by the two-dot chain line in FIG. 1, a tension spring 7 is connected between the extension piece 31 of the main rod 3 and the auxiliary rod 5 to bias the main rod 3 and the auxiliary rod 5 in the direction of opening. Or, if a leaf spring is installed between the main rod 3 and the auxiliary rod 5,
Claw pieces 4, 4 on the free end side of the main rod 3 and the auxiliary rod 5, respectively
b is pressed in the direction of biting into the pile 1 by the spring force, which is more effective in preventing the scaffold from falling off, and the footrest 6 on the main rod 3 side is removed, and the footrest 6a on the auxiliary rod 5 side is replaced.
That alone is enough.

FIG. 5 shows another embodiment of the scaffolding 2 to be attached to the channel steel 1a, in which the claw pieces 4, 4a at both ends of the main rod 3 and the claw pieces 4b of the auxiliary rod 5 are both attached to the channel steel facing each other. This corresponds to the width of both side walls 11,11.

If the pile is cylindrical, such as a utility pole, the claws protruding from the main and auxiliary rods can be formed in the shape of semicircular hooks, making it possible to easily construct a scaffold for the cylinder.

[Brief explanation of drawings]

Fig. 1 is a front view showing the state of use, Fig. 2 is a slope view of the same as above, Fig. 3 is a plan view of the same as above, Fig. 4 is a plan view of the engaged state of the claw piece and stake, Fig. 5 is the other FIG. 1...Pile, 2...Scaffolding, 3...Main rod, 4,4
a, 4b...claw piece, 5...auxiliary rod, 6...footrest.

Claims (1)

[Scope of utility model registration request] The claw pieces 4, 4 are attached laterally to both ends of the main rod 3, respectively.
A is provided protrudingly provided, and a footrest 6 is also provided protruding outward from the proximal claw piece 4a, and an auxiliary footrest 6 of approximately equal length to the spacing between the claw pieces 4, 4a of the main rod 3 is provided at the proximal end of the main rod 3. A simple scaffolding in which the base end of a rod 5 is pivotally supported, and a claw piece 4b is provided laterally protruding from the free end of an auxiliary rod 5.