JP2923200B2 - Materials for hanging scaffolds - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved suspension scaffolding member which can safely and efficiently assemble a suspension scaffold used for construction of a highway or a bridge.

[0002]

2. Description of the Related Art As a method of assembling a suspended scaffold, which can be installed safely and with good workability in a short time, Japanese Patent Laid-Open Publication No. Hei.
Japanese Patent No. 140363 discloses a rope A such as a chain suspended from a pair of supporting members such as a pair of girders as shown in FIG.
Locking portions 2 provided at both ends of the hanging scaffold member 21
2 to suspend and support the suspended scaffolding member 21 having an area on which the worker can ride, and also suspend and support the same suspended scaffolding member 21 beside the suspended scaffolding member 21; There is disclosed a method of forming a continuous suspended scaffolding in a required range below a bridge girder or the like by repeating the operation of connecting and fixing each other with the connecting tool 23. When such a hanging scaffold member 21 is used, a vertical pipe member is sequentially connected to a rope A suspended from a pair of conventional girder members and the like, and a horizontal pipe member is provided between the vertical pipe members and a clamp is used. Compared with the method of repeating the work of joining together and placing a scaffold plate on the space between the horizontal pipe members and fixing it with a number line, even unskilled workers can work safely and efficiently.

As shown in FIGS. 5 and 6, the hanging scaffold member 21 has a main member 25 formed of a pair of square pipes connected to each other by a connecting member 26 formed of a round pipe. A long and narrow rectangular base frame 24 is formed. A suitable space is left at both ends in the longitudinal direction of the base frame 24, and auxiliary connecting members 27 are provided at appropriate intervals in the intermediate portion thereof, and the main members 25 are connected to each other. The central positions of the connecting members 26, 26 are connected by a vertical connecting member 28 formed of a round pipe penetrating the auxiliary connecting member 27, and the connecting member 26 of the vertical connecting member 28 and the auxiliary connecting member 27 opposed thereto are connected. The portion between them constitutes a locking portion 22 for locking the rope A suspended from a support member such as a bridge girder. A tread 29 made of expanded metal or the like is stretched on the upper surface of the space between the auxiliary connecting members 27 at both ends. The auxiliary connecting member 27 is connected to the main member 25 such that the upper surface of the tread member 29 on the auxiliary connecting member 27 is substantially flush with the upper surface of the main member 25.
The portion between 27 is fixed to a support piece 30 fixed to the inner surface of the main member 25 at appropriate intervals.

[0004]

However, in the structure of the above-mentioned conventional hanging scaffolding member 21, both side edges of the treading member 29 are supported at appropriate intervals by the auxiliary connecting member 27 and the supporting piece 30. Since the gap is not supported, when expanded metal is used as the stepping material 29, it is easily dented when a load is applied to this portion due to insufficient rigidity, which causes trouble or danger to the operation on the stepping material 29. There was a problem.

In order to solve such a problem, the tread 29
Although it is sufficient to use a highly rigid striped steel plate etc., there is a problem that the weight becomes large, and there is a case using a relatively lightweight and rigid plywood concrete panel, but when exposed to rainwater There is a problem that it rots in a short period of time, and it is extremely dangerous to use it if it is overlooked.

At the time of assembling the suspended scaffold, the suspended scaffold member 21 to be assembled next is loaded on the already assembled suspended scaffold member 21, and the suspended scaffold member 21 is pushed out, and the locking portion 22 of the hanging scaffold 22 is connected to the cable A. However, in this case, the upper surface of the hanging scaffold member 21 is rubbed and moved, and the upper surface of the tread 29 and particularly the head of the rivet or screw fixing the tread 29 are fixed. There is also a problem that there is a risk of damaging the device.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention provides a highly safe and lightweight suspension scaffolding member which does not have a possibility that its side edge portion is depressed by a load even if a relatively rigid stepping material is used. The purpose is to propose.

[0008]

According to the present invention, in order to achieve the above-mentioned object, a pair of main units facing each other at an arbitrary interval is provided according to the present invention. The both ends of the member 3 are connected by the connecting member 4 to form a square frame-shaped base frame 2. In the hanging scaffold member 1 in which the treads 9 are attached to the base frame 2, the pair of main members 3 A configuration is adopted in which shoulders 5 are recessed at the upper ends of the inner portions facing each other, and both side edges of the tread 9 are placed and attached to the shoulders 5.

According to a second aspect of the present invention, the difference in height between the upper surface of the main member 3 and the shoulder 5 is larger than the thickness of the tread 9. is there.

[0010]

According to the first aspect of the present invention, since both side edges of the tread 9 are placed on the shoulders 5 which are recessed at the upper ends of the inner portions of the pair of main members 3, the tread 9 is provided. Is supported by the shoulders 5 over its entire length, so that even when a relatively rigid tread 9 is used, the tread 9 can easily be dented when a large load is applied to the side edge. Therefore, the lightweight tread 9 can be used even though the rigidity is small, and the member 1 for a suspended scaffold with high safety and light weight can be provided.

According to a second aspect of the present invention, the height difference between the upper surface of the main member 3 and the shoulder portion 5 is made larger than the thickness of the tread member 9 so that the upper surface of the main member 3 becomes the tread member 9. , The upper surface of the main member 3 is also rubbed and moved when the loaded suspended scaffold member 1 is pushed out, and the upper surface of the tread 9 and the tread are fixed. It is possible to eliminate the risk of damaging the rivet or screw head.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a member for a suspended scaffold according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a slender rectangular hanging scaffolding member having a size on which a person can ride, wherein both ends of the main members 3 and 3 are made of a pair of square pipes. The base frame 2 is formed by being connected by connecting members 4 and 4 made of short circular pipes. As shown in detail in FIGS. 2 and 3, at the upper ends of the inner portions of the pair of main members 2 facing each other,
The shoulder 5 is formed in a recessed manner.

In the middle portion of the base frame 2 with an appropriate space left at both ends in the longitudinal direction, the main members 3 and 3 are connected to each other by auxiliary connecting members 6 having a U-shaped cross section arranged at appropriate intervals. Are connected. The upper surface of the auxiliary connecting member 6 and the upper surface of the shoulder portion 5 are substantially flush. The connecting members 4, 4 at both ends in the longitudinal direction of the base frame 2 are connected at their center positions by a vertical connecting member 7 formed of a round pipe penetrating the auxiliary connecting member 6.
At a portion between the connecting member 4 of the vertical connecting member 7 and the auxiliary connecting member 6 opposed thereto, a locking portion 8 for locking the rope A suspended from a supporting material such as a bridge girder is provided. It is configured.

In a space surrounded by the auxiliary connecting members 6 at both ends of the base frame 2 and the pair of main members 2, 2, a striped aluminum plate having a non-slip ridge protrudingly formed on the upper surface is formed. The stepping material 9 is stretched. The tread plate 9 is mounted on the upper surface of the auxiliary connecting member 6 and both side edges thereof are mounted on the shoulder portion 5, and the peripheral edge thereof is appropriately spaced between the auxiliary connecting member 6 at both ends and the shoulder portion 5 of the main member 3. Are fixed by a fixing means 10 such as a plurality of screws, rivets, spot welding, or the like, which are disposed in the fixing device.

The difference in height between the upper surface of the main member 3 and the shoulder 5 is considerably larger than the thickness of the tread 9, and the height of the head 10a of the fixing means 10 such as a screw or rivet is mainly different. It is made lower than the upper surface of the material 3.

In FIG. 1, reference numeral 11 denotes a connecting member for connecting the hanging scaffold members 1 to each other in the width direction thereof. The other half part, which is fitted and fixed to the member 4 and is inserted, is inserted into the connecting member 4 of the other hanging scaffold member 1, and the through hole 11 a formed in the connecting member 11 and the locking hole 4 a formed in the connecting member 4 are inserted. The two scaffold members 1, 1 are connected to each other by being aligned and penetrating a locking member (not shown) such as a gravity lock.

According to the hanging scaffold member 1 having the above-described structure,
Since both side edges of the tread 9 are placed on the shoulder 5 recessed at the upper ends of the inner portions of the pair of main members 3, the side edge of the tread 9 is supported by the shoulder 5 over the entire length. I have. Therefore, even if the stepping material 9 having relatively small rigidity is used, when a large load is applied to the side edge portion of the stepping material 9, the stepping member 9 is not easily dented.
Therefore, a lightweight material having a small rigidity can be used as the tread 9, and the lightweight and stable member 1 for a suspended scaffold can be obtained.

Further, since the height difference between the upper surface of the main member 3 and the shoulder portion 5 is larger than the thickness of the tread member 9, the main member 3
Is located above the upper surface of the tread 9. Therefore, when assembling the hanging scaffold, when the hanging scaffold member 1 previously loaded on the already assembled hanging scaffolding member 1 is pushed out for assembling next, the hanging scaffolding member 1 faces the upper surface of the main material 3. As a result, the upper surface of the tread 9 and the head 10a of the fixing means 10 such as rivets or screws that fix the tread 9 are not likely to be damaged.

In the above embodiment, an example in which a striped aluminum plate is used as the stepping material 9 has been described. However, as long as it has a predetermined strength and rigidity, a plate-like material as light as possible may be used. Alternatively, a plywood concrete panel or the like can be used.

Further, in the above embodiment, the treads 9 are stretched in a range excluding both ends of the base frame 2 on which the locking portions 8 are arranged. May be. In that case, an opening for passing the cable A may be formed in the locking portion 8, or the cable A may be passed through a mesh of expanded metal.

[0022]

According to the first aspect of the present invention, the side edges of the tread are placed on the shoulders recessed at the upper ends of the inner portions of the pair of main members. Is supported by the shoulders over its entire length, so even if a relatively stiff tread is used, it does not easily dent when a large load is applied to the tread side edges, so the stiffness is small. Also, a lightweight tread can be used, and a highly safe and lightweight suspended scaffold member can be provided.

According to the second aspect of the present invention, the height difference between the upper surface of the main member and the shoulder portion is made larger than the thickness of the tread member so that the upper surface of the main member is larger than the upper surface of the tread member. Since it is located above, when pushing out the loaded suspended scaffolding member, it will rub against the upper surface of the main material and move, and the rivets and screws that fix the upper surface of the tread and the tread will be The possibility of damaging the head can be eliminated.

[Brief description of the drawings]

FIG. 1 is a plan view of a member for a suspended scaffold according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken on line II-II of FIG.

FIG. 3 is an enlarged sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a perspective view of a hanging scaffold member of the present invention.

FIG. 5 is a partial plan view of a conventional member for hanging scaffold.

6 is an enlarged sectional view taken along the line VI-VI in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Suspended scaffold member 2 Base frame 3 Main material 4 Connecting material 5 Shoulder 6 Auxiliary connecting material 8 Locking part 9 Treading material A Cable

Claims (2)

(57) [Claims] 1. A hanging scaffold member comprising a rectangular frame-shaped base frame formed by connecting both ends of a pair of main members facing each other at an arbitrary interval with a connecting member, and attaching a tread to the base frame. At
A member for a suspended scaffold, characterized in that a shoulder portion is formed by recessing an upper end of an inner portion of a pair of main members facing each other, and both side edges of a tread are placed and mounted on the shoulder portion. 2. The suspended scaffolding member according to claim 1, wherein the difference in height between the upper surface of the main member and the shoulder is greater than the thickness of the tread.