JPH0978842A - Crane for scaffold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce labors, load, by laying rails on steel pipe scaffolds constituted of connected pipes and installing a motor-driven chainblock transferring to the right-angled direction against the rails to hoist even relatively long or large materials. SOLUTION: The first beam 2 is transferably fixed to two rails 4, 4 horizontally laid on a steel pipe scaffold 100. The second beam 3 provided with a motor-driven chainblock 5 is fixed to the first beam 2 so as to be transferable to the right-angled direction against the rails, to form a scaffold crane. When bringing working materials onto the working floor of the scaffold 100, the second beam 3 is protruded to the outside of the scaffold 100 and materials are suspended by the chainblock 5 and then the second beam 3 is retracted. Then, the first beam 2 is traversed to locate it at a specified position and the materials are unloaded by the chainblock. In this way, even relatively long or large materials can be received and delivered and hence, works can be safely and efficiently done.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffolding hoist which is installed on a scaffold serving as a work floor in a construction site or a painting site and is used for moving articles such as work tools in vertical and horizontal directions. Is.

[0002]

2. Description of the Related Art Conventionally, a hoist is similar to the above-mentioned hoist for scaffolding.

This hoist is movably supported by rails horizontally provided at or near the top of the scaffold,
It is used to raise items such as work tools and lightweight materials to the scaffolding, and to dispose of unnecessary items on the ground.

[0004]

However, in the above hoist, in order to prevent the long article from interfering with the scaffold when the long article is lifted and lowered, the rail supporting the hoist is pushed out from the scaffold. If you install a rail to support the hoist inside the scaffold while avoiding this, a worker must lean out from the scaffold and pull in the suspended objects into the scaffold. There is a problem that it is not possible to raise and lower relatively large items including long items, and eventually a large hoist such as a climbing crane is needed, and there is a problem to solve these problems. Was a conventional problem.

[0005]

SUMMARY OF THE INVENTION The present invention has been made by paying attention to the above-mentioned problems of the prior art, and ensures the safety of an operator who works on a scaffold and is relatively large in size, including long articles. An object of the present invention is to provide a hoist for scaffolding capable of raising and lowering the article.

[0006]

A scaffolding hoist according to claim 1 of the present invention comprises a first beam movably provided on a scaffold in a horizontal direction and a first beam slidable in the longitudinal direction thereof. In addition, the second beam provided so as to be able to project from the scaffold, and the article elevating means movable along the second beam are provided. The configuration is a means for solving the above-mentioned conventional problems.

In the scaffolding hoist according to claim 2 of the present invention, in the scaffolding hoist according to claim 3 of the present invention, the first beam is movably supported by a rail horizontally provided on the scaffold. The first beam is hung on a rail via an electric trolley.

In the hoisting machine for scaffolds according to claim 4 of the present invention, two rails are provided facing the scaffolding.
The beams are constructed between two rails,
In the hoist for scaffolding according to claim 5 of the present invention, the first
The two electric trolleys of the beam are attached to the first beam so as to be rotatable about a vertical axis, and one of the two electric trolleys is detachable from the rail. It has a certain structure.

A scaffolding hoist according to claim 6 of the present invention comprises a first beam that is horizontally rotatable and vertically movable on the scaffold, and slides on the first beam in its longitudinal direction. And a second beam which is provided so as to project from the scaffold, and an article elevating means that can move along the second beam. The scaffolding hoist according to claim 7 of the present invention has a structure in which the first beam is suspended and held by an electric chain block.

A scaffolding hoist according to claim 8 of the present invention comprises a brake mechanism between the first beam and the second beam, and a scaffolding hoist according to claim 9 of the present invention is: A beam driving mechanism for driving the second beam is provided, and in the hoisting machine for scaffolding according to claim 10 of the present invention, the article elevating means is hung on the second beam via an electric trolley. There is.

[0011]

In the hoisting machine for scaffolds according to claims 1 and 2 of the present invention, the second beam is slid relative to the first beam so as to project from the scaffold, and the article lifting means is used for the second beam. If it is located on the tip side of the, the lifting and lowering of articles will be performed at a position away from the scaffold, and relatively large articles including long-sized articles can be raised and lowered without interfering with the scaffold. .

After the article is thus lifted at a position away from the scaffolding, the second beam is pulled toward the base end side of the first beam, and the article elevating means is moved toward the base end side of the second beam. When the first beam is moved horizontally along the rail, the article is removed from the article elevating means on the scaffold plate, and the worker who works on the scaffold works. In addition to ensuring safety, the moving range of the article elevating means above the scaffold plate is widened by the amount of horizontal movement of the first beam.

Further, since the scaffolding hoist according to claim 3 of the present invention has the above-mentioned configuration, the burden on the operator when moving the first beam is reduced.

Further, in the hoisting machine for scaffolding according to claim 4 of the present invention, because of the above-mentioned configuration, the first beam is stably supported by the rail, and the scaffolding according to claim 5 of the present invention. In the hoist, after removing one of the two electric trolleys from the rail, the first beam is rotated around the other electric trolley and the other electric trolley is supported. If one of the electric trolleys is supported by the rails, the first beam will be supported along one rail, and when the first beam is moved over a long distance or the curved portion is Correspondence will be taken when moving on a certain rail.

On the other hand, in the hoisting machine for scaffolds according to claims 6 and 7 of the present invention, the second beam is slid with respect to the first beam so as to project from the scaffold, and the article lifting means is used for the second beam. If it is located on the tip side of the, the lifting and lowering of articles will be performed at a position away from the scaffold, and relatively large articles including long-sized articles can be raised and lowered without interfering with the scaffold. .

After the article is thus lifted at a position away from the scaffolding, the second beam is pulled toward the base end side of the first beam, and the article elevating means is moved toward the base end side of the second beam. Then, when the first beam is rotated, the article is detached from the article elevating means on the scaffold plate, and the safety of the worker who works on the scaffold is ensured. In addition, if the first beam is moved up and down by the electric chain block, the article can be removed from the article elevating means on the scaffold plate on any of the plurality of floors.

Further, in the hoisting machine for scaffolding according to claim 8 of the present invention, when the brake mechanism is operated, the second beam is securely fixed to the first beam, so that the safety is improved. Therefore, in the scaffolding hoist according to claim 9 of the present invention, the burden on the operator when moving the second beam is lightened, and in the scaffolding hoist according to claim 10 of the present invention, the article is raised and lowered. This will reduce the burden on the operator.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

1 to 4 show the first to fifth aspects of the present invention.
An example of the hoist for scaffolding concerning 8 and 10 is shown.

As shown in FIG. 1, a steel pipe scaffold 100 to which the scaffolding hoist 1 is attached has a plurality of vertical bars 101a arranged along the wall surface of a building (not shown) and a plurality of vertical bars 101b apart from the wall surface. Side-by-side vertical bars 101a, 101b
Are arranged in two rows, between the vertical bars 101a along the wall surface, between the vertical bars 101b apart from the wall surface, and the vertical bars 10 facing each other.
A cross rail 102 is installed between 1a and 101b, connected in a cross shape by a cross clamp 103, and a scaffold plate 104 is passed between the cross rail 102a along the wall surface and the cross rail 102b away from the wall surface. I am doing it.

The scaffolding hoist 1 includes a cross rail 102 near the wall surface.
a and a pair of rails 4 and 4 made of I-shaped steel, which are respectively disposed along the horizontal rails 102b distant from the wall surface, and suspended and held by the horizontal rails 102c provided between the vertical rails 101a and 101b facing each other. , The first installed between the pair of rails 4 and 4
Beam 2, a second beam 3 provided on the first beam 2 so as to be slidable in the longitudinal direction thereof so as to project from the tip (the lower right end in the drawing) of the first beam 2, and the second beam 3. An electric chain block (article lifting means) 5 that moves along the beam 3 is provided.

The first beam 2 is made of I-shaped steel, and electric trolleys 6 are provided on the upper surfaces of both ends of the first beam 2.
Beam 2 moves horizontally in the direction of white arrow A along the pair of rails 4 and 4 by hooking the electric trolleys 6 and 6 on the lower flanges of the pair of rails 4 and 4, respectively. Has become. In this case, both of the two electric trolleys 6 and 6 are attached to the first beam 2 so as to be rotatable about the vertical axis, and the two electric trolleys 6 and 6 are provided at the base end side (upper left in the figure). The electric trolley 6 located on the side) is detachable from the rail 4. That is, the first beam 2 is rotatable in the direction of the arrow in the figure, and the first beam 2 is rotated around the electric trolley 6 on the base end side so that the electric power on the base end side can be changed. Rail 4 supporting trolley 6
By hooking the electric trolley 6 on the tip side to the first beam 2 can be suspended and moved on one rail 4 as shown by the chain double-dashed line in the figure, that is, the first beam 2 Can be dealt with when moving over a long distance or when moving on a rail 4 having a curved portion.

Further, as shown in FIG. 2, on both sides of the tip end portion of the first beam 2, the base plate 8 fixed between the upper and lower flanges 2A and 2B extends to the second beam 3 side. Roller holding plates 9 and 9 are provided so as to face each other, and the roller shaft 11 and the roller shaft 11 are provided inside the extending portions of the roller holding plates 9 and 9 via bearings 10 and (10), respectively. Rollers 12 and 12 supported by 11 are provided.

As shown in FIG. 3, the second beam 3 is made of I-shaped steel and has substantially the same overall length as the first beam 2. On both sides of the base end of the second beam 3,
Base plate 13 fixed between lower flanges 3A and 3B
Roller holding plates 14 and 14 that extend toward the first beam 2 side through are provided so as to face each other, and the insides of the extending portions of these roller holding plates 14 and 14 are also illustrated in the drawings. Rollers 16 and 16 supported by roller shafts 15 and 15 via bearings that are not provided are provided, and the second beam 3 is configured such that the rollers 12 and 12 on the side of the first beam 2 are The rollers 16 and 16 on the side of the second beam 3 are brought into contact with the lower surface of the upper flange 3A on both sides of the web 3C and the upper flange 2A on both sides of the web 2C on the first beam 2 are formed.
By contacting the lower surfaces of the first beams 2 with each other, the first beams 2 can slide along the longitudinal direction (the direction of the white arrow B in FIG. 1), that is, can project from the scaffold 100.

In this case, the roller bearings 17, 1 abutting on the upper surface of the lower flange 2B of the first beam 2 are provided inside the roller holding plates 14, 14 on the second beam 3 side.
By providing 7 respectively, rattling between both beams 2 and 3 is prevented, and although not shown, in the vicinity of the tip end and the base end of the web 2C of the first beam 2 and near the base end. By providing stoppers on the moving paths of the rollers 16 on the beam 3 side of the second beam 2,
The sliding range of the beam 3 is regulated.

A brake mechanism 19 is provided at the base end of the second beam 3. As shown in FIG. 4, the brake mechanism 19 has a bottomed cylindrical case 20 having an opening fixed to the base end surface of the second beam 3 and a cylindrical member 22 fitted in the case 20. A braking member 21 mounted on the upper end of the first beam 2 to abut the lower flange 2B of the first beam 2 for braking the second beam 3, and fitted in a cylindrical member 22 in a compressed state so that both ends of the case 20 A coil spring 23 is provided which comes into contact with the bottom portion and the braking member 21, respectively, and the elastic force of the coil spring 23 presses the braking member 21 against the lower flange 2B of the first beam 2 so that the second beam 3 Are fixed to the first beam 2.

The brake mechanism 19 is used in the case 2
0 has an eyebolt 24 that penetrates the center of the bottom portion of the 0 and has its tip screwed into the braking member 21, and an operation wire 25 connected to this eyebolt 24. By pulling this operation wire 25 downward, the braking member 21 is separated from the lower flange 2B of the first beam 2 to release the fixed state of the second beam 3 and, in this state, the operation wire 25 is moved to the first position.
By pulling the beam 2 in the longitudinal direction, the sliding operation of the second beam 3 is performed.

The electric chain block 5 is provided with an electric trolley 7 on the upper surface of the main body thereof, and the electric chain block 5 has drive rollers 7a, 7a of the electric trolley 7 in a second position.
The lower beam 3 is hooked on the lower flange 3B to move along the second beam 3. In this case, the stopper 3a is provided at the tip portion of the second beam 3 and on the moving path of the drive rollers 7a, 7a in the electric trolley 7 to prevent the electric trolley 7 from falling off the second beam 3. There is.

When an article is hoisted from the ground by the scaffolding hoist 1 to the scaffolding board 104 of the scaffolding 100, first,
The operation wire 25 of the brake mechanism 19 is pulled downward to
The fixed state of the beam 3 is released, and in this state the operation wire 25
To the tip side of the first beam 2 to attach the second beam 3 to the scaffold 100.
Then, the operation wire 25 is released and the second beam 3 is fixed to the first beam 2 by the brake mechanism 19.

Subsequently, after the electric trolley 7 supporting the electric chain block 5 is operated to be positioned on the tip side of the second beam 3, the hook 5a of the electric chain block 5 is lowered to the ground.

Then, after suspending the article on the hook 5a of the electric chain block 5 on the ground, the hook 5a is lifted and the article is suspended near the tip of the second beam 3, and the commodity is lifted and lowered from the scaffold 100. Therefore, the relatively large articles including the long articles can be raised and lowered without interfering with the scaffold 100.

Next, the electric trolley 7 supporting the electric chain block 5 is actuated to move it to the base end side of the second beam 3, and the operation wire 25 is pulled as shown by the chain line in FIG. After pulling the second beam 3 toward the base end side of the first beam 2, the second beam 3 is fixed by the brake mechanism 19, and subsequently, electric power is applied so that the article is located above the scaffolding plate 104. When the trolleys 6 are operated to move the first beam 2 horizontally along the rails 4 and 4, the article is removed from the hook 5a of the electric chain block 5 on the scaffold plate 104. In addition to ensuring the safety of the worker who works on the scaffolding board 104,
As the beam 2 moves horizontally, the moving range of the electric chain block 5 above the scaffolding plate 104 expands.

In the meantime, in the scaffolding hoist 1, the horizontal movement of the first beam 2 is performed by the operation of the electric trolleys 6 and the movement of the electric chain block 5 with respect to the second beam 3 is also the electric trolley 7. Is performed, the burden on the operator when moving the first beam 2 and the electric chain block 5 is reduced.

In the hoisting machine for scaffolding 1, the first
The beam 2 moves horizontally along the pair of rails 4 and 4, so that the movement is performed stably. In addition, in the scaffolding hoist 1, the two electric trolleys 6 and 6 are connected to each other. Both are attached to the first beam 2 so as to be rotatable around a vertical axis, and the electric trolley 6 located on the base end side of the first beam 2 is made detachable with respect to the rail 4. Since the first beam 2 is rotatable, the electric trolley 6 located on the tip side of the first beam 2 is removed from the rail 4 and the first trolley 6 is rotated around the electric trolley 6 on the base side. If the electric trolley 6 on the distal end side is supported by the rail 4 supporting the electric trolley 6 on the proximal end side while being moved,
The first beam 2 is supported along one rail 4, so that the first beam 2 can be moved over a long distance or on a rail 4 having a curved portion. The Rukoto.

Further, since the scaffolding hoist 1 is provided with the brake mechanism 19, the scaffolding hoist 1 has the second beam with respect to the first beam 2.
Since the beam 3 is securely fixed, the safety is improved.

FIG. 5 shows an embodiment of a scaffolding hoist according to claims 6 to 8 and 10 of the present invention.

As shown in FIG. 5, this scaffolding hoist 51
Is a pillar 54 made of I-shaped steel attached to a vertical bar 111 of the scaffold 110 via a bracket 112, and the pillar 54.
A rotation beam (first beam) 52 that is horizontally rotatable and vertically movable, and a tip of the rotation beam 52 that slides in the longitudinal direction of the rotation beam 52 (right end in the figure). Sliding beam (second beam) 53 provided so as to project from the electric chain block (article lifting means) movable along the sliding beam 53
55.

The support column 54 is a slider 5 that moves along a flange 54A on the side opposite to the scaffold 110 of the support column 54.
6 is provided, and an electric chain block 58 hung from a block 57 is provided at the upper end. The sliders 56 are provided with two rollers 59, 59 respectively provided facing each other at positions extending from the upper and lower ends to the scaffold 110 side.
The flanges 54A, 5 on both sides of the web 54C of the column 54
4B is brought into contact with the inner surface of the electric chain block 4B, and the hook 58a of the electric chain block 58 is hooked at the upper end thereof to move up and down along the flange 54A of the column 54 by the chain winding / unwinding operation of the electric chain block 58. Has become.

The turning beam 52 is made of I-shaped steel, and its base end (the left end in the drawing) is connected to the lower bracket 56a of the slider 56 via a vertical pin 56b. It can rotate horizontally and can be raised and lowered. By connecting the projecting piece 52a provided on the tip end portion of the rotating beam 52 and the rotating pin 56d provided on the upper bracket 56c of the slider 56 with the stay 60, the rotating beam 52 can be always kept horizontal. I can do it.

In this case, the flange 54A of the support column 54 is provided with guides 61 extending in the longitudinal direction, which are respectively provided at the upper and lower ends of the slider 56 and supported by the horizontal axis of the roller 59 which is orthogonal to the horizontal axis. Auxiliary roller 62,
By abutting 62 on both side surfaces of the guide 61, the slider 56 can be raised and lowered, that is, the rotating beam 52 can be raised and lowered more smoothly.

The sliding beam 53 is made of I-shaped steel like the rotating beam 52, and plates 6 projecting upward are formed on both sides of the base end of the sliding beam 53.
3 is provided. These plates 63 have rollers 6
4 are provided so as to face each other.
4 is brought into contact with the lower surface of the upper flange 52A on both sides of the web 52C of the rotating beam 52, and a roller 66 supported by a downwardly projecting plate 65 provided at the tip of the rotating beam 52 is attached to the sliding beam. By making it hook on the upper flange 53A on both sides of the web 53C in 53, it can slide along the longitudinal direction of the rotating beam 52, that is, can project from the scaffold 110.

In this case, the web 52 of the rotating beam 52 is
Stoppers 67, C near the tip end and near the base end and on the moving path of the roller 66 on the sliding beam 53 side, respectively.
By providing 68, the sliding range of the sliding beam 53 is regulated.

The electric chain block 55 is self-propelled along the sliding beam 53 by the operation of the electric trolley 69 provided on the upper surface of the main body of the electric chain block 55. By providing the stopper 53a on the traveling path of the trolley 69, the electric trolley 69 is prevented from falling off the sliding beam 53.

In this embodiment, a scaffolding hoist 51
The brake mechanism 19 is provided at the base end of the sliding beam 53 as in the previous embodiment, so that the sliding beam 53 can be securely fixed to the rotating beam 52.

When hoisting the article from the ground to the scaffold plate of the scaffold 110 by the scaffolding hoist 51, first, the operation wire 25 of the brake mechanism 19 is pulled downward to slide the sliding beam 5.
3 is released from the fixed state, and in this state, the operation wire 25 is pulled toward the tip side of the rotating beam 52 to project the sliding beam 53 from the scaffold 110, and then the operation wire 25 is released to release the brake mechanism 1.
The sliding beam 53 is fixed to the rotating beam 52 by 9.

Then, the electric trolley 69 supporting the electric chain block 55 is operated to be positioned on the tip side of the sliding beam 53, and then the hook 55 of the electric chain block 55.
Lower a to the ground.

Next, after hanging the article on the hook 55a of the electric chain block 55 on the ground, the hook 5
If the article is lifted up to the vicinity of the tip of the sliding beam 53 by raising 5a, the article is lifted and lowered at a position away from the scaffold 110, so that a relatively large article including a long article can be raised and lowered. It will be performed without interfering with the scaffold 110.

Next, the electric trolley 69 supporting the electric chain block 55 is operated to move it to the base end side of the sliding beam 53, and the operating wire 25 is pulled to move the sliding beam 53 to the base of the rotating beam 52. After the sliding beam 53 is pulled to the end side and subsequently the sliding beam 53 is fixed by the brake mechanism 19, the turning beam 52 is turned so that the article is located above the scaffold plate. Since the article is removed from the hook 55a on the scaffolding board, the safety of the worker who works on the scaffolding board is ensured, and in addition, the rotating beam 52 is moved up and down by the electric chain block 58. Then, on any floor of the plurality of floors, the article is detached from the hook 55a of the electric chain block 55 on the scaffold plate.

In the meantime, in the above-mentioned scaffolding hoist 51, the electric chain block 55 is moved with respect to the sliding beam 53 by the operation of the electric trolley 69, so that the burden on the operator when moving the electric chain block 55 is light. Will be things.

Also in the scaffolding hoist 51,
Since the brake mechanism 19 is provided, the sliding beam 53 is reliably fixed to the rotating beam 52, so that the safety is improved.

FIG. 6 shows an embodiment of a scaffolding hoist according to claim 9 of the present invention.

As partially shown in FIG. 6, the scaffolding hoist 81 in this embodiment includes an electric trolley (beam driving mechanism) 90 for driving the second beam 83.

This electric trolley 90 is attached to blocks 84 fixed to both ends of the first beam 82 via pins 85 and a pair of plates 86, 86, and drive rollers 91, 91 of the electric trolley 90 are attached. The upper flange 83A with the web 83C of the second beam 83 in between.
Of the electric trolley 90 is slid along the longitudinal direction of the first beam 82 by bringing the output of the electric trolley 90 into contact with the lower surface of the first beam 82, that is, the tip of the first beam 82. The other structure is the same as that of the first embodiment.

That is, in this scaffolding hoist 81,
The burden on the operator when moving the beam 83 is reduced.

The detailed construction of the scaffolding hoist according to the present invention is not limited to the above-mentioned embodiments.

[0056]

As described above, according to the first aspect of the present invention.
In the hoisting machine for scaffolds according to 2 and 3, because of the above-described configuration, the second beam is slid relative to the first beam to project from the scaffolding, and the article lifting means is located on the tip side of the second beam. By doing so, it is possible to raise and lower the article at a position away from the scaffold, and even for relatively large articles including long articles, it is possible to raise and lower the article without interfering with the scaffold. In addition, after lifting the article, the second beam is pulled toward the base end side of the first beam, and the article elevating means is moved to the base end side of the second beam. By moving the object along the rail in the horizontal direction, it is possible to remove the article from the article lifting means on the scaffolding plate, so that it is possible to ensure the safety of the worker who works on the scaffolding. Yes, in addition, the first beam moves horizontally Results in a very good effect of expanding the range of movement of the article lifting means above the scaffolding board.

Further, since the scaffolding hoist according to claim 3 of the present invention has the above-mentioned structure, the burden on the operator when moving the first beam can be reduced, and the scaffolding hoist according to claim 4 of the present invention can be reduced. Since the scaffolding hoist has the above-described configuration, the stability of the first beam can be ensured. In the scaffolding hoist according to claim 5 of the present invention, either one of the two electric trolleys can be electrically driven. After removing the trolley from the rails, the first beam is rotated around the other electric trolley, and the one electric trolley is supported by the rail supporting the other electric trolley. Since the beam is supported along one rail, it is possible to cope with the case where the first beam is moved over a long distance or when it is moved on a rail having a curved portion. Fluttered .

On the other hand, in the hoisting machine for scaffolding according to claims 6 and 7 of the present invention, if the second beam is projected from the scaffolding and the article elevating means is located at the tip side of the second beam,
It is possible to raise and lower the article at a position away from the scaffold, and it is possible to raise and lower the article without interfering with the scaffold, even for relatively large articles including long articles. After the article is lifted, the second beam is pulled toward the base end side of the first beam, and the article elevating means is moved to the base end side of the second beam, and then the first beam is rotated. If it is moved, it is possible to remove the article from the article lifting means on the scaffolding plate, and therefore, it is possible to ensure the safety of the worker who works on the scaffolding.
If you move the first beam up and down with the electric chain block,
An excellent effect that the article can be removed from the article lifting / lowering means on the scaffold plate on any of the plurality of floors is provided.

Further, in the scaffolding hoist according to claim 8 of the present invention, the second beam can be securely fixed to the first beam by operating the brake mechanism, so that the safety is improved. The scaffolding hoist according to claim 9 of the present invention can reduce the burden on the operator when moving the second beam, and the scaffolding hoist according to claim 10 of the present invention provides It is possible to reduce the burden on the operator when raising and lowering the height, which is a very excellent effect.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view showing an embodiment of a scaffolding hoist according to claims 1 to 5, 8 and 10 of the present invention.

FIG. 2 is a cross-sectional explanatory view of an intermediate portion of a second beam in the scaffolding hoist shown in FIG.

FIG. 3 is a cross-sectional explanatory view of a portion where the first beam and the second beam of the scaffolding hoist shown in FIG. 1 overlap.

FIG. 4 is a cross-sectional explanatory view of a brake mechanism of the scaffolding hoist shown in FIG. 1.

FIG. 5 is a side view showing an embodiment of a scaffolding hoist according to claims 6 to 8 and 10 of the present invention.

6 (a) and 6 (b) are a sectional explanatory view (a) and a partial side explanatory view (b) at an intermediate portion of the second beam, showing an embodiment of the scaffolding hoist according to claim 9 of the present invention.

[Explanation of symbols]

 1,51,81 Hoist for scaffolding 2 First beam 3 Second beam 4 Rails 5,55 Electric chain block (article lifting means) 6 Electric trolley 7,69 Electric trolley for article lifting means 19 Brake mechanism 52 Rotating beam (First beam) 53 Sliding beam (second beam) 58 Electric chain block 90 Electric trolley (beam drive mechanism) 100, 110 Scaffold

Claims (10)

[Claims] 1. A first movably provided on a scaffold in a horizontal direction.
Beam, a second beam slidably provided on the first beam in a longitudinal direction thereof so as to project from the scaffold, and an article lifting means movable along the second beam. A hoist for scaffolds characterized by the following. 2. The scaffolding hoist according to claim 1, wherein the first beam is movably supported by a rail horizontally provided on the scaffolding. 3. The scaffolding hoist according to claim 2, wherein the first beam is suspended on a rail via an electric trolley. 4. The rail is provided with two rails facing each other on the scaffold, and the first beam is installed between the two rails.
Alternatively, the hoist for scaffolding according to item 3. 5. The two electric trolleys on the first beam are attached to the first beam so as to be rotatable around a vertical axis, and at least one of the two electric trolleys is connected to the electric trolley. The hoist for scaffolding according to claim 4, wherein the hoist for scaffolding is detachable from the rail. 6. A first beam provided on the scaffold so as to be horizontally rotatable and movable up and down, and a second beam provided on the first beam so as to be slidable in the longitudinal direction thereof so as to project from the scaffold. Scaffolding hoist, comprising: a beam of the above and an article elevating means movable along the second beam. 7. The scaffolding hoist according to claim 7, wherein the first beam is suspended and held by an electric chain block. 8. The hoist for scaffolding according to claim 1, further comprising a brake mechanism between the first beam and the second beam. 9. The scaffolding hoist according to claim 1, further comprising a beam driving mechanism that drives the second beam. 10. The hoist for scaffolding according to claim 1, wherein the article lifting means is hung on the second beam via an electric trolley.