JP2004124376A - Scaffold suspension device for construction work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a practical, light and compact scaffold suspension device for construction work capable of being easily carried and transported and adjusting suspension height of a scaffold plate simply at site and being safe from electrical viewpoint. <P>SOLUTION: A fiber rope 5 having a braided structure is used as a suspension rope body. A connection part 6 for suspension is provided at one end in the longitudinal direction of the braided fiber rope 5. A length adjusting part 7 which leads the other end side in the longitudinal direction from a rope side part at an another position through a cavity at the center from a side part of rope itself is provided at an adequate section in an intermediate part. A beam member receive support part body 8 having electrical insulation is displaceably externally mounted between the connection part 6 for suspension and the length adjusting part 7. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a scaffolding hanger for construction.
[0002]
[Prior art]
BACKGROUND ART In a work in which a worker works in a hollow position, for example, a work of inspecting, painting, or repairing a bridge girder of a railway or a road, a suspension scaffold is used.
As a means for obtaining such a suspended scaffold, a chain is conventionally used, the middle of the chain is inverted into a U shape, and the chain is fixed to a structure at the upper end of the chain. The U-turn portion supports both ends of the girder tube, arranges these at predetermined intervals, and passes a scaffold plate to each girder tube in an intersecting manner.
[0003]
However, the scaffolding hanger of the prior art has the following problems.
1) Since the weight of the hanging tool is heavy, a large amount of labor and time are required in each stage of transporting a large number of hanging tools required for construction to the site, carrying the site, and setting.
2) It is difficult to easily adjust the suspension height position of the scaffold plate (girder tube) on site.
3) A high-voltage overhead line is often laid on a bridge girder or the like. However, since the chain is made of steel, an induced current is induced and an electric shock accident occurs.
[0004]
[Problems to be solved by the invention]
The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a lightweight and compact, easy to carry and carry, electrically safe, and a suspension height of a scaffold plate. It is an object of the present invention to provide a practical scaffolding for construction work whose height can be easily adjusted on site.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention uses a fiber rope having a braided structure as a hanging strip, and the braided fiber rope has a hanging connection portion at one end in the longitudinal direction, and has a longitudinal direction other portion at an intermediate portion. The end side has a length adjustment part derived from the rope side part at another position through the center cavity from the side part of the rope itself, and between the hanging connection part and the length adjustment part In addition, an electrically insulating spar member receiving portion is provided so as to be displaceable.
[0006]
The spar member receiving portion is configured by externally fitting an electrically insulating cylinder relatively thicker than the braided fiber rope, or by fastening an end of an electrically insulating flat belt. .
The braided fiber rope is preferably composed of fibers having high strength and low elongation characteristics.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows an application example of a construction scaffolding hanger according to the present invention, wherein 1 is a bridge girder of an iron bridge, having an upper girder 1a on which a vehicle track is laid and a lower girder 1b rigidly connected thereto. are doing. A high-voltage wire 9 is laid on the bridge girder 1.
Reference numerals 2 and 2 denote construction scaffolding hanger of the present invention. The bridge girder 1 has an upper end connected to and supported by the bridge girder, a lower part supports a girder member 3 called a single pipe, and a scaffold plate 4 on the girder member 3. They are placed in a cross.
[0008]
2 to 5 show a first embodiment of a scaffolding hanger for construction according to the present invention, and 5 is a fiber rope having a braided structure as a hanger.
The braided fiber rope 5 has a predetermined length, for example, 2 to 3 m. One end side in the longitudinal direction has a connecting portion 6 for being connected to an appropriate place of the bridge girder 1 and receiving suspension. The braided fiber rope 5 extends outside through a length adjusting portion 7 formed on a side portion of the braided fiber rope 5 itself. Accordingly, a single rope portion 5a above the length adjusting portion 7 is an endless portion 5b divided into two forks below the length adjusting portion 7.
A flexible and electrically insulating spar member supporting member 8 is disposed between the connecting portion 6 and the length adjusting portion 7 so as to be displaceable. The end of the other end portion 51 is coated with a coating 510 by tape winding or the like so that the strands do not fall apart.
[0009]
The braided fiber rope 5 is preferably not a general-purpose fiber, but a high-strength low-elongation fiber having a breaking strength of 20 g / d or more and an elastic coefficient of 500 g / d or more, for example, a wholly aromatic polyester fiber, an aramid fiber, Ultra-high molecular weight polyethylene fibers and the like are made as raw yarns.
Then, a bundle of a large number of such high-strength, low-elongation fiber yarns is aligned in parallel, or one strand or a plurality of strands 50 twisted with long leads are made into one set, and the strands are braided. The braided fiber rope 5 is used. In the figure, 12 shots (2 × 6) are used, but 1 × 12, 8 shots (2 × 4), 1 × 8, 16 shots (2 × 8), and the like may be used.
[0010]
In this example, the connecting portion 6 is formed by fixing a hook-shaped metal fitting, but is not limited thereto, and may be an ice splice with a thimble or a splice without a thimble.
[0011]
The length adjuster 7 is shown in FIGS. In the state where the braided fiber rope 5 is subjected to a tensile force in the axial direction, each of the strands 50 comes close to each other as shown in FIG. Is formed by utilizing the feature of the tissue having a hollow structure, and as shown in FIG. 3, an opening 70 is formed by pushing and spreading between the set strands 50 ', 50' at a desired position. Even at a distance, the braided strands 50 ′ and 50 ′ are pushed apart to form an opening 71, and the other end 51 of the braided fiber rope 5 is inserted from the opening 70 into the hollow portion 72 of the braided fiber rope 5, After that, it is led out from the opening 71 to the outside.
The adjusting portion 7 can be provided at any part of the braided fiber rope 5 or a plurality of adjusting portions can be provided. Also, the length can be set freely.
[0012]
The spar member receiving member 8 is doubled with the braided fiber rope 5 contained therein, thereby increasing strength and diameter. The spar member receiving portion 8 needs to be electrically insulating and flexible so as to follow the contour of the spar member 3.
In this example, a thick fiber rope having a braided structure that is denser than the braided fiber rope 5 is cut, and is fitted around the braided fiber rope 5 as shown in FIG. As the fiber in this case, it is preferable that the fiber has good abrasion resistance. In addition to the high-strength low-elongation fiber as described above, a polyester fiber or the like is used. For example, a braided strand of 24 hits or 48 hits using a strand having a smaller diameter is used.
[0013]
However, the spar member receiving and supporting member 8 can use a cut piece of a cloth hose, a cut piece of a rubber hose, or the like, in addition to a braided fiber tube.
Further, since the girder member receiving portion 8 only needs to surround the braided fiber rope 5 in a cylindrical shape at the time of use, it does not necessarily have to be a tube in a single state, but as shown in FIGS. 6 (a) and 6 (b). It may be a flat belt that can be shaped and maintain that state.
The flat belt is made of an electrically insulating material such as multiply laminated or padded canvas, rubber, a soft resin sheet, or a tightly woven fabric, and has fastening elements 80 and 81 on the side. The fastening elements 80 and 81 are optional such as a hook-and-loop fastener, a zipper, a hook, and a string in which countless fine fibers are planted.
[0014]
The present invention is not limited to the above-described embodiment, and can take various aspects. For example, when the girder member support cylinder 8 has a braided structure, it may have a coating of a resin having high wear resistance such as urethane.
The braided fiber rope 5 is basically not coated so that the extent of the damage can be known, but in some cases, except for the length adjusting portion 7, the braided fiber rope 5 has a coating with high wear resistance such as urethane. May be.
[0015]
Operation of the embodiment
The use and operation of the embodiment will be described. Each of the pair of right and left hanging members 2, 2 is connected to one length of the rope portion 5a from the length adjustment portion 7 and from the length adjustment portion 7 to the one rope portion 5a. Since the lower side is an endless portion 5b, when the bridge girder 1 is to be painted, the connecting portion 6 at the upper end of the braided fiber rope is connected to the bridge girder 1 or its attached structure to form a U-shaped intermediate portion. The girder member 3 is passed to and supported by the girder member receiving portion 8. Such a set is provided at predetermined intervals in a direction perpendicular to the plane of the paper of FIG. 1, and a scaffolding plate 4 is passed across each of the beam members 3 so as to obtain a suspended scaffold.
[0016]
In the suspended state, the braided fiber rope 5 does not directly contact the girder member 3 and the girder member receiving portion 8 is in contact with the girder member 3, so the braided fiber rope 5 is not damaged by rubbing and has good durability. Can be The girder member supporting member 8 is made of a braided body having a dense structure, and is well compatible with the braided fiber rope 5, does not move in the longitudinal direction with moderate frictional resistance, does not rotate, and is compressed from both ends in the longitudinal direction of the cylinder when necessary. By doing so, a gap is formed between the braided fiber rope 5 and the braided fiber rope 5, so that the position can be easily shifted along the braided fiber rope 5 so as to correspond to a change in the support position of the spar member at the time of adjustment described later.
[0017]
Furthermore, since the braided fiber rope 5, the length adjusting portion 7, and the girder member supporting portion 8 are electric insulators, even if the high-voltage electric wire 9 runs near, no induced current is induced. Even if the connecting portion 6 is a metal fitting, the secondary current is not transmitted downward from this point. Therefore, the worker can work safely without electric shock. In addition, since no rust is generated, cleaning and storage are easy.
[0018]
In the present invention, since the hanging strip is made of the braided fiber rope 5, it is lighter than the chain by more than 1/5, and can be folded in a flexible and compact manner. It is very easy to carry from the field base to the hanging place and set at the hanging place, which can reduce labor and time.
[0019]
In addition, since the length adjusting portion 7 is configured by inserting the free end of the rope into the cavity from the rope side and taking out from the arbitrary cavity using the cavity structure peculiar to the braided fiber rope, the tensile force in the axial direction is obtained. 7 (a) and 7 (b), the length, that is, the distance L1 from the connecting portion 6 as the suspension base end to the receiving portion as shown in FIGS. , L2 can be adjusted steplessly. Moreover, the position of the girder member receiving portion 8 can be moved along the braided fiber rope 5 according to the change of the receiving portion.
Therefore, it is possible to easily and accurately set the height level of the opposing girder member receiving portion at the site, and the height level of the object portion such as the bridge girder connecting the connecting portions 6 is left and right as shown in FIG. Even if they are different, the girder member 3 and the scaffold plate 4 thereon can be installed horizontally.
[0020]
When the distances L1 and L2 from the connecting portion 6 as the hanging base end to the receiving portion are adjusted to support the girder member 3, the braided fiber rope 5 is pulled in the axial direction. For this reason, the diameter of the strand of the braided fiber rope 5 is reduced so as to lose the cavity, so that, in the length adjusting section 7, the group of outer strands that define the cavity is connected to the free end of the inserted rope. Since the side is tightened, it is firmly fixed by friction in combination with the engagement of the unevenness of the strand, and does not shift.
[0021]
When high-strength low-elongation fiber is used as a raw material of the braided fiber rope 5, it exhibits the same tensile strength as a wire rope, and its elongation is as small as a wire rope. Moreover, since it has a braided structure, it is non-rotating and does not twist. Therefore, these can stably support the girder member 3 and the scaffold plate 4 thereon.
In the case where the braided fiber rope 5 is not covered, the degree of damage such as adhesion of paint, cutting of yarn, jumping out of yarn, and the like can be determined by observing the appearance, thereby determining an appropriate replacement time. And sufficient safety management can be performed. The scaffolding hanger of the present invention is not necessarily limited to the work related to the bridge girder of the bridge, but can be widely used for electric path work, construction work, civil engineering work, and the like.
[0022]
【The invention's effect】
According to the first aspect of the present invention described above, a fiber rope 5 having a braided structure is used as a hanging strip, and the braided fiber rope 5 has a hanging connection portion 6 at one longitudinal end, and a middle portion in a proper position. Has a length adjusting portion 7 whose other end in the longitudinal direction is drawn out from the rope side portion at another position through the center cavity from the side portion of the rope itself. Since the electrically insulating spar member receiving portion 8 is externally displaceable between the adjustment portions 7, the following excellent effects can be obtained.
[0023]
1) Since it is lightweight and compact, it can be easily transported, carried, and installed on site.
2) Pull out the other end side of the braided fiber rope 5 from the length adjusting section 7 and adjust the supporting height position of the girder member 3 on the site by a very simple operation of merely shifting the position of the girder member supporting section 8 appropriately. It can be adjusted freely, and the length adjustment part 7 tightly tightens the other end of the rope inserted by pulling the rope, so that the adjustment position does not shift, and in combination with the non-rotating nature of the rope. The girder member 3 and the scaffold plate 4 can be reliably and stably supported at an appropriate height position.
[0024]
3) Since the braided fiber rope 5 does not directly contact the girder member 3 and the relatively thick girder member receiving portion 8 contacts the girder member 3, damage to the fiber rope 5 due to rubbing or the like is prevented, and durability is improved. Can be raised.
4) Since the hanging strip is made of an electrically insulating fiber rope 5 and both the length adjusting section 7 and the girder member supporting section 8 are electrically insulating, there is a high-voltage electric wire near the hanging position of the structure. However, no induced current is induced, and no accident such as electric shock occurs from the scaffold plate 4 even if the hanging strip is touched, and it is electrically safe.
[0025]
According to the second aspect, since the braided fiber rope 5 is made of a high-strength low-elongation fiber, it is possible to obtain a strength and a small elongation comparable to a chain while being lightweight, and to provide the beam member 3 and the scaffold plate 4 at the adjustment position. Can be reliably and stably supported.
According to the third aspect, since the girder member supporting portion 8 is formed by fitting an electrically insulating tube which is relatively thicker than the braided fiber rope, the structure is simple and the girder member 3 is supported. An excellent effect of being able to move in response to a change in height position is obtained.
[0026]
According to the fourth aspect, since the electrically insulating cylinder relatively thicker than the braided fiber rope is formed by cutting a thick fiber rope having a braided structure denser than the braided fiber rope 5, the braided fiber rope is formed. 5 does not move in the longitudinal direction unnecessarily with moderate frictional resistance and does not rotate, yet it expands by compressing from both ends in the longitudinal direction to form a gap with the braided fiber rope 5. An excellent effect is obtained that the position can be easily shifted along the braided fiber rope 5 so as to correspond to the change.
[0027]
According to the fifth aspect, since the girder member receiving portion 8 is formed by fastening the end of the flat belt having electrical insulation, it can be easily mounted from the side of the braided fiber rope 5 and can be replaced. Is also easy to obtain.
[Brief description of the drawings]
FIG. 1 is an explanatory view exemplifying a use state of a construction scaffolding hanger according to the present invention.
FIG. 2 is a perspective view showing an embodiment of a construction scaffolding hanger according to the present invention.
FIG. 3 is an enlarged plan view of a length adjustment unit.
4A is a sectional view taken along line aa of FIG. 3, and FIG. 4B is a sectional view taken along line bb of FIG. 3;
FIG. 5 is an enlarged sectional view taken along line cc of FIG. 2;
FIG. 6A is a perspective view showing another example of the girder member receiving portion of the present invention, and FIG. 6B is a cross-sectional view in a used state.
FIGS. 7 (a) and 7 (b) are schematic diagrams showing a comparison of height adjustment states in the present invention.
[Explanation of symbols]
3 girder member 4 scaffold plate 5 braided fiber rope 6 connecting part 7 length adjusting part 8 girder member receiving part

Claims (5)

A fiber rope 5 having a braided structure is used as a hanging strip, and the braided fiber rope 5 includes a connecting portion 6 for suspension at one end in the longitudinal direction, and the other end in the longitudinal direction is provided at an appropriate position in the intermediate portion. It has a length adjusting portion 7 derived from the rope side portion at another position through the center cavity from the side portion, and an electrically insulating property is provided between the hanging connecting portion 6 and the length adjusting portion 7. A scaffolding hanger for construction, characterized in that the girder member receiving portion 8 of (1) is externally displaceable. The scaffolding hanger for construction according to claim 1, wherein the braided fiber rope 5 is made of high-strength low-elongation fiber. The scaffolding hanger for construction according to claim 1 or 2, wherein the girder member supporting portion (8) is formed by externally fitting an electrically insulating tube which is relatively thicker than the braided fiber rope. 4. The scaffolding hanger for construction according to claim 3, wherein the electrically insulating cylinder relatively thicker than the braided fiber rope is formed by cutting a thick fiber rope having a braided structure denser than the braided fiber rope 5. 5. The scaffolding hanger for construction according to claim 1 or 2, wherein the girder member supporting member (8) is configured by fastening an end of an electrically insulating flat belt.

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