JP2002147012A - Handrail frame for scaffold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handrail frame for a scaffold for simplifying driving of engaging hooks. SOLUTION: In this handrail frame for the scaffold having a horizontal part for constructing the handrail for the scaffold installed between engaging object parts respectively formed in adjacent scaffold columns, and the first and second engaging hooks projected on both ends of the horizontal part, a wall surface 18a facing in the direction of the second engaging hook 17 for engaging with one engaging object part, is formed on the first engaging hook 15, an engaging claw 19 projecting toward the second engaging hook 17 side is formed near a lower part, and tapered parts 20 facing in the direction of the first engaging hook 15 are formed on the second engaging hook 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a scaffolding handrail frame for constructing a scaffolding handrail used for a scaffold at a construction site.

[0002]

2. Description of the Related Art At a construction site or the like, a work scaffold is constructed by assembling pipe materials or the like into a frame shape, and a scaffold plate is mounted on the scaffold to form a work passage on the scaffold. Conventionally, in such a scaffold, as a handrail for work when working on a scaffold plate, that is, as a handrail for a scaffold, as shown in FIG.
A handrail frame 53 for scaffolding is provided between connecting frames 52 formed on the left and right columns 51, respectively. In this conventional scaffolding handrail frame 53, a bar-shaped handrail pipe 5 as a horizontal portion is provided.
Engagement hooks 55 are provided at both ends of 4 so as to protrude toward the side. The engagement hooks 55 are inserted between the left and right connecting frames 54 and fixed to construct a handrail for scaffolding.

[0003] By the way, generally, the scaffolding handrail frame 53 can be installed between the connecting frames 52 according to the following theory. That is, the engagement hook 5 of the handrail frame 53 for a scaffold is used.
Reference numeral 5 denotes a tapered surface 57 that is in contact with the connection frame 52 and faces toward the engagement hook 55, and the lower the distance between the two, the farther apart. As shown in FIG. 10, when the distance between the engagement surfaces 52a with which the engagement hooks 55 between the two connection frames 52 come into contact is L, the distance between the two tapered surfaces 57 is
7 is set to L + α slightly longer than the distance L in the lower portion. Therefore, when the two engagement hooks 55 are inserted between the left and right connection frames 54, they can be inserted without any interference with the connection frames 54. However, the distance between the two tapered surfaces 57 is conversely shorter than L near the upper portion of the tapered surface 57, and is L-α. Accordingly, the two engaging hooks 55 inserted into the connecting frame 54 are prevented from further descending at a position where the distance of the tapered surface 57 becomes equal to the distance L. In this state, the upper portion of the engagement hook 55 is driven with a hammer, so that the two engagement hooks 55 are connected like a wedge.
2 and the scaffolding handrail frame 53 is firmly erected.

[0004]

However, in such a conventional scaffolding handrail frame 53, it is necessary to drive the engaging hooks 55 on both sides, and it is necessary to construct many scaffolding handrails on the scaffold. It is extremely troublesome from this point of view. Furthermore, unless the engagement hooks 55 on both sides are driven in a well-balanced manner, the leveling of the handrail pipe 54 cannot be ensured, so that more careful work than expected has been required. SUMMARY OF THE INVENTION The present invention has been made to solve the problems contained in the conventional technology, and an object of the present invention is to provide a handrail frame for scaffolding in which driving of an engagement hook is simplified.

[0005]

Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 constructs a handrail for a scaffold by bridging between engaged portions formed on adjacent scaffolding posts, respectively. A handrail frame for scaffolding, comprising a horizontal portion, and first and second engaging hooks projecting laterally at both ends of the horizontal portion, and the first engaging hook includes An engaging portion is formed facing the second engaging hook to engage with one of the engaged portions, and an engaging claw protruding downward toward the second engaging hook is formed. The second engaging hook has an engaging portion that faces the first engaging hook and engages with the other engaged portion. And formed so as to be tapered in a direction away from the first engagement hook toward the first engagement hook. The gist of the invention is that the distance between the two engaging portions is set to be shorter in the upper portion and longer in the lower portion. According to the above configuration, the distance between the engaging portions of the two engaging hooks is longer toward the lower side than the distance between the two engaged portions, but shorter on the upper side. In the case of disposing them between them, initially, both engaging hooks do not interfere with both engaged portions. However, since the engaging portion of the second engaging hook is tapered, as the handrail frame for scaffolding approaches the both engaged portions, the distance between the engaged portions and the distance between the two engaging hooks increase. The gaps between the engaging portions approach each other and interfere with each other at substantially coincident positions, thereby preventing further advancement of the scaffolding handrail frame toward the both engaged portions. Here, when the second engagement hook is driven in with a hammer or the like, it functions as if it were a wedge, and an action occurs in which the engagement portions of both engagement hooks are pulled toward each other in the engaged portion direction. Like the second engaging hook, the first engaging hook is not hammered by a hammer or the like, and is not firmly engaged with the engaged portion. However, the first engaging hook does not come off due to an upward pulling force by the engaging claw. As secured.
In order to achieve the above object, the invention according to claim 2 provides the scaffolding handrail frame according to claim 1, wherein the first and second engaging hooks are inserted into the engaged portions in the first state. The gist of the present invention is that the engaging portion of the engaging hook is brought into surface contact with the engaged portion. According to the above configuration, in addition to the function of the first aspect, the scaffolding handrail frame erected by the contact surface between the engaging portion of the first engaging hook and the engaged portion is held. It becomes difficult to rattle.

[0006]

According to the first aspect of the present invention, the first and second engaging hooks are disposed between the engaged portions, and only the second engaging hook is driven with a hammer or the like to easily use the scaffold. A railing frame can be installed. In the invention described in claim 2, in addition to the effect of the invention described in claim 1, the handrail frame for a scaffold that is erected because the engaging portion of the first engaging hook is in surface contact with the engaged portion is formed. It will be hard to tack.

[0007]

Hereinafter, a scaffolding handrail frame 11 according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 4, both end portions 14 of a handrail pipe 13 as a horizontal portion constituting the handrail frame 11 for a scaffold,
The first and second engagement hooks 15 and 17 are fixed to 16 by welding so as to protrude sideways. The handrail pipe 13 is a steel hollow body having a circular cross section,
The second end 16 side is slightly flattened to fix the engaging hook 17. First engagement hook 15
Extends laterally from the first end 14 of the handrail pipe 13 so as to be orthogonal to the longitudinal direction of the handrail pipe 13. The first engagement hook 15 is a steel flat body 18.
Hook claw 1 bent inward from the lower end of body 18
9. In the present embodiment, a wall surface 18a of the main body 18 facing the second engaging hook 17 is an engaging portion. The second engaging hook 17 is formed by bending a steel plate, and the second end hook 16 is connected to the handrail pipe 13.
Are extended to the side so as to be substantially perpendicular to the longitudinal direction of the. The extending directions of the first engaging hook 15 and the second engaging hook 17 are the same. Second engaging hook 17
A tapered portion 20 is formed on the inner end facing the first engagement hook 15 as an engagement portion that is separated from the first engagement hook 15 from the base end to the distal end.

Next, the handrail frame 11 for a scaffold according to the present embodiment is described.
The operation of will be described. First, the scaffolding support 21 and the connection frame 23 will be schematically described. As shown in FIGS. 3 and 4, connecting frames 23 are formed on the scaffolding support 21 at predetermined intervals. A pair of connecting frames 23 are arranged at the same height position facing 180 degrees, and another pair of connecting frames 2 are vertically shifted from these and are shifted 90 degrees in the circumferential direction.
3 are arranged. That is, the connection frames 23 are arranged at 90 degrees in the circumferential direction, and are shifted vertically so that adjacent connection frames 23 do not interfere with each other. Each connecting frame 23 is composed of two side walls 24 welded to the scaffolding column 21 and an engaging wall 25 connecting the both side walls 24, and communicates vertically as a whole while being fixed to the scaffolding column 21. Frame. The engagement surface 25 inside the engagement wall 25
The first and second engaging hooks 15 and 17 abut on a, and the scaffolding handrail frame 11 is supported. Engagement surface 2
5a is formed in a plane and is arranged to be vertical when the scaffolding column 21 is installed. In the connecting frame 23 having such a configuration, the scaffolding handrail frame 11 is erected between the connecting frames 23 facing the adjacent scaffolding columns 21. still,
In the figure, the left and right connecting frames 23 on which the scaffolding handrail frame 11 is installed are referred to as connecting frames 23L and 23R, respectively.

First, as shown in FIG. 5, the scaffolding handrail frame 11 is disposed above the connecting frames 23L and 23R. Then, the first engagement hook 15 is inserted into the lower (rightward in the figure) connecting frame 23R. At this stage, even if the first engagement hook 15 is inserted, the first engagement hook 15 does not interfere with the connection frame 23R side, and therefore, as shown in FIG.
The railing pipe 13 is brought into contact with (ie, placed on) the upper end of the connection frame 23R near the base. Next, the second engagement hook 17 is inserted into the opposite (left in the figure) connection frame 23L. However, at this stage, since the first engagement hook 15 is still inserted, the handrail pipe 13 is erected and installed as shown in FIG. Therefore, in practice, the handrail pipe 13 is lifted to be in a substantially parallel state.
Then, the second engagement hook 17 is driven in with a hammer.
Then, as shown in FIG. 3 and FIG.
At the same time, the scaffolding handrail frame 11 slightly moves to the left in the figure as a whole, and the wall surface 18a of the first engaging hook 15 engages with the connecting frame 23R. It is strongly pressed against the engagement surface 25a of the wall 25. That is, the wall surface 18a is in surface contact with the engagement surface 25a of the engagement wall 25 of the connection frame 23L. In this state, since the hook 19 is present, the hook 19 is connected to the connecting frame 23 against the upward pulling force.
Since the first engagement hook 15 is held at the lower end of the R, the first engagement hook 15 does not rise. In this way, the installation of the scaffolding handrail frame 11 is completed, and the construction of the scaffolding handrail on the scaffolding support 21 is completed at one place. By the same operation, the scaffolding handrail frame 11 is erected one after another. Next, when removing the scaffolding handrail frame 11 from the connection frames 23L and 23R, the lower surface of the handrail pipe 13 near the second engagement hook 17 is launched upward. Then, the second engagement hook 1
7 is released from the engagement surface 25a on the connection frame 23L side, and the rightward movement of the scaffolding handrail frame 11 is allowed. The surface contact of the wall surface 18a with the engagement surface 25a of the connection frame 23L is also released. Then, when the entire scaffolding handrail frame 11 is slightly moved rightward so that the hooking claws 19 of the first engaging hooks 15 are not hooked on the engaging walls 25, the handrail pipe 13 is lifted upward with the handrail pipe 13.

With such a configuration, the scaffolding handrail frame 11 of the present embodiment has the following effects. (1) The second engagement hook 17 is provided on the engagement surface 2 of the connection frame 23L.
5a, and the first engagement hook 15 is provided on the wall surface 18a of the first engagement hook 15 on the engagement surface 2 of the connection frame 23R.
5a, the scaffolding handrail frame 11 is connected to the connecting frames 23L and 2L.
It does not fall out of the 3R. (2) The wall surface 18a of the first engagement hook 15 is
The scaffolding handrail frame 11 erected due to surface contact with the R engaging surface 25a is less likely to rattle. (3) The wall surface 18a of the first engagement hook 15 and the connection frame 23
The R engaging surface 25a is in contact with the handrail pipe 13 at a surface orthogonal to each other. Therefore, the second engagement hook 1
When the scaffolding handrail frame 11 is slightly moved to the left in the figure as a whole by hammering 7 with a hammer, the pressing force does not generate a vector in an oblique direction, and the first engaging hook 15 escapes in the vertical direction. Since there is no such a situation, the main body 18 is firmly pressed against the engagement surface 25a of the connection frame 23R.

The present invention is not limited to the above embodiment, but can be embodied with the following modifications. In the above embodiment, the wall surface 18 of the first engagement hook 15
a was configured to be perpendicular (perpendicular) to the handrail pipe 13. This does not matter as long as the same effect can be obtained even if there is a slight rough surface or rattling in accuracy. The wall surface 18a may not necessarily be perpendicular to the handrail pipe 13 as long as the basic effect can be obtained. -The shape of connection frame 23L, 23R is not limited to the said embodiment. In the above description, it is formed in a cylindrical shape. In the above embodiment, the scaffolding handrail frame 11 is mounted on the connection frames 23L, 23R from above, but may be used from the side. The position and shape of the hook 19 can be changed as appropriate. -It is free to carry out the present invention in a modified form, such as a material or appearance may be different, without departing from the spirit of the present invention.

The technical ideas of the present invention that can be grasped from the above embodiment will be described as additional notes below. (1) The surface of the engaging portion of the first engaging hook that comes into contact with the engaged portion is configured to be substantially orthogonal to the horizontal portion. The handrail frame for scaffolds described in.

[0013]

[Brief description of the drawings]

FIG. 1 is a perspective view of a handrail frame for scaffolding according to an embodiment of the present invention.

FIG. 2 is a perspective view of a handrail frame for a scaffold according to the embodiment of the present invention.

FIG. 3 is a plan view showing a state in which the scaffolding handrail frame of the same embodiment is installed on a connecting frame.

FIG. 4 is a side view showing a state in which the scaffolding handrail frame of the same embodiment is installed on a connecting frame.

FIG. 5 is a side view illustrating a process of erection of the scaffolding handrail frame of the same embodiment on a connection frame.

FIG. 6 is a side view illustrating a step of erection of the scaffolding handrail frame of the same embodiment on a connecting frame.

FIG. 7 is a side view illustrating a step of erection of the scaffolding handrail frame of the same embodiment on a connection frame.

FIG. 8 is a side view illustrating a step of erection of the scaffolding handrail frame of the same embodiment on a connection frame.

FIG. 9 is a side view of a state in which a conventional scaffolding handrail frame is erected on a connecting frame.

FIG. 10 is an explanatory diagram for comparing and explaining the distance between an engaging hook of a conventional scaffolding handrail frame and a connecting frame.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Handrail frame for scaffolding, 13 ... Handrail pipes 13 and 15 as a horizontal part, 15 ... 1st engaging hook, 17 ... 2nd engaging hook, 18 ... Main body as an engaging part, 19 ... Hook nail , 2
0: tapered portion as an engaging portion.

Claims (2)

[Claims] 1. A scaffolding handrail frame constructed between an engaged portion formed on an adjacent scaffolding support and constructing a scaffolding handrail, comprising: a transverse portion; And first and second engagement hooks projecting toward the first engagement hook, and the first engagement hook faces in the second engagement hook direction to engage with one of the engaged portions. An engaging portion is formed, and an engaging claw protruding toward the second engaging hook side is formed downward, and the second engaging hook engages with the other engaged portion. An engaging portion facing the first engaging hook is formed, and is formed so as to be tapered in a direction away from the first engaging hook from a base portion of the engaging portion toward a distal end portion. The distance between the two engaging portions is shorter than the distance between the two engaged portions when it is closer to the upper portion, and longer when it is closer to the lower portion. Scaffolding for the handrail frame, characterized in that it was. 2. The engaging portion of the first engaging hook makes surface contact with the engaged portion when the two engaging hooks are inserted into the engaged portion. The handrail frame for scaffolds described in.