JP3314180B2 - Work cage lifting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working cage elevating device used for laying a water pipe, a gas pipe, and the like on a bridge girder.

[0002]

2. Description of the Related Art When supplying water, natural gas, etc. to land separated by rivers, straits, gorges, etc., water pipes, gas pipes, etc. are laid on bridge girders of bridges laid in rivers, straits, gorges, etc. Often supplied. Conventionally, the work of laying water pipes, gas pipes, etc. on a bridge girder is performed by suspending the work cage with a wire rope locked to a balustrade, or fixing the work cage to the tip of the boom of a truck crane. Then, the work cage was brought close to the outside of the bridge girder, and the worker got on the work cage and worked.

[0003]

However, in the method in which the work cage is hung by a wire rope locked on a balustrade or the like, it is difficult to securely lock the wire rope when the shape of the balustrade or the like is special. If the strength of the balustrade was low, the weight of the work cage could not be tolerated, and it was extremely dangerous to work in the work cage. Also, when laying water pipes, gas pipes, etc. along the bridge girder, the work cage also moves along the bridge girder, so the locking position of the wire rope must be changed several times, and It took a long time. On the other hand, in the method of fixing the work cage to the tip of the truck crane boom, if the allowable load of the bridge is small or the width of the bridge is relatively narrow, the truck crane must be moved to the bridge and stopped in the first place. Can not. or,
The operation of moving the boom up and down and moving up and down to bring the work cage close to the outside of the bridge girder is cumbersome, and it has been quite difficult for an operator to get into the work cage fixed to the end of the boom.

The present invention has been made in view of such a conventional problem, and an object of the present invention is to safely work in a work cage regardless of the shape and strength of a balustrade or the like. The work cage can be easily moved during the work of laying water pipes, gas pipes, etc., and even if the allowable load of the bridge is small and the width of the bridge is relatively narrow, laying work without any problem It is another object of the present invention to provide a work cage lifting / lowering device which can easily bring a work cage close to the outside of a bridge girder and allow an operator to easily get into the work cage.

[0005]

In order to achieve the above object, the present invention relates to a cage body on which an operator rides, and an upper rod connected to an upper end of a vertical rod provided in parallel with the cage body. A work cage consisting of a main body support frame to which the locking member is fixed,
A pedestal to which the mounting table is connected, an upper end fixed to the front end face of the pedestal, a guide rail for guiding the work cage up and down, a plurality of mounting legs fixed to the pedestal, A working cage elevating device was constituted by a cage support having a mounted electric winch, a wire rope having a hook fixed to one end thereof, and a traveling cart having a leg mounting member to which the mounting leg was freely mounted. Things.

If the lower rod is connected to the lower end of the vertical rod and a cage stop rod is fixed to the lower end of the guide rail, the lower rod can be moved to the cage stop rod even if the working cage is lowered too much by mistake. This is preferable because there is no danger that the working cage will deviate from the guide rail and fall.

Further, if the mounting legs are provided in a larger number than the leg mounting members, and the mounting legs are appropriately selected and can be mounted on the leg mounting members, the width of the balustrade, the width of the bridge girder, the sidewalk in the bridge, etc. The mounting leg can be appropriately selected according to the presence or absence of the above, which is extremely convenient.

Further, if the mounting leg is formed by connecting a short cylindrical body and a long cylindrical body, by preparing several types of long and short cylindrical bodies, it is possible to appropriately respond to the height of the balustrade. A very long cylinder can be selected, which is extremely convenient.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a working cage lifting device according to an embodiment of the present invention.

As shown in FIG. 1, the working cage elevating device 1 includes a working cage 2, a cage support 3, and a traveling vehicle 4.
Consists of

As shown in FIG. 2, the working cage 2 comprises a cage body 5 and a body support frame 6. The cage body 5 is provided with vertical rods 8, 8,
..., and a bar 9 between the vertical rods 8, 8, ...
, And the upper ends of the vertical rods 8, 8,... And the rods 9, 9,. Connecting member 1 bent into a substantially J-shape at 8,8
Are fixed to one end to form a cage.
The main body support frame 6 is formed in a frame shape by connecting a lower rod 14 to a lower end of the vertical rods 13, 13 erected in parallel, and an upper rod 15 to an upper end thereof. A U-shaped locking member 16 is fixed. And the vertical rod 1 of the main body support frame 6
The other ends of the connecting members 12, 12,... Of the cage body 5 are fixed to the middle and lower ends of the cage bodies 3, 13, respectively. And are connected by a reinforcing plate 17.

As shown in FIG. 3, the cage support 3 includes a gantry 18, guide rails 19, 19, mounting legs 20, 20, and
.., The electric winch 21, the wire rope 22, and the like. The gantry 18 is composed of a plurality of short connecting rods 24, 24, which are long horizontal rods 23, 23 arranged in parallel at appropriate intervals.
.. Are connected to form a frame.
The mounting table 25 is connected to the rear ends of the mounting plates 3 and 23. The support members 26 and 2 are provided at the center of the front connecting rod 24.
6, a guide roller 27 is mounted. The guide rails 19, 19 have a U-shaped cross section with the inside being a guide groove 19a. The upper ends thereof are fixed to the front end surfaces of the horizontal rods 23, 23, and the both ends of the cage stop rod 28 are fixed to the lower ends. I have. The distance between the guide rails 19 is substantially the same as the distance between the vertical rods 13 of the main body support frame 6.

Each of the mounting legs 20, 20,... Comprises a short cylindrical body 29 and a long cylindrical body 30.
a, 30a are brought into contact with each other and fastened by bolts and nuts, and the upper ends of the short cylindrical bodies 29, 29,. The electric winch 21 is mounted on the mounting table 25, and the other end of the wire rope 22 having one end to which the hook 31 is fixed is engaged with the rotating drum 32, and the wire rope 22 is wound around the rotating drum 32 as appropriate. It is. Reference numeral 33 denotes a drive control device. The wire rope 22 drawn from the rotary drum 32 passes through a substantially central portion of the gantry 18, is guided by the guide rollers 27, and is suspended at an intermediate position between the guide rails 19, 19. .

The traveling vehicle 4 includes a crawler 34 and leg mounting members 35, 35 as shown in FIG. The crawler 34 includes a plurality of wheels 3 below the mounting table 36.
, 37, ... are provided with driving bodies 39, 39 in which a caterpillar (registered trademark) 38 is stretched. The leg mounting members 35, 35 are provided with reinforcing members 41 on the side surfaces of the tubular body 40.
Is fixed to the cylindrical body 40 and the long cylindrical body 30
Are fitted. The distance between the centers of the tubular bodies 40, 40 is substantially the same as the distance between the centers of the left and right mounting legs 20, 20.

The working cage lifting / lowering device 1 is configured as described above. First, the cage support 3 is lifted by a small crane, the rear portion of the gantry 18 is positioned above the traveling vehicle 4, and the mounting legs 20, The 20 long cylindrical bodies 30, 30 are fitted to the cylindrical bodies 40, 40 of the leg mounting members 35, 35.
Next, the working cage 2 is lifted by a small crane, the main body support frame 6 is positioned above the guide rails 19 of the cage support 3, and the vertical rods 13 of the main body support frame 6 are moved.
Into the guide grooves 19a, 19a of the guide rails 19, 19 to guide the work cage 2 up and down freely. Finally, if the hook 31 fixed to one end of the wire rope 22 is locked to the locking member 16 fixed to the main body support frame 6, the working cage elevating device 1 can be assembled.

When disassembling the working cage lifting / lowering device 1, the operation just opposite to the above operation may be performed.

Next, a description will be given of a case where the operation and use method of the working cage lifting / lowering device 1 of the present invention is used for laying a water pipe on a bridge girder of a bridge erected on a river.

As shown in FIG. 5, the traveling carriage 4 is previously moved into the bridge, and a balustrade 52 is placed on a road surface 51 at one end of the bridge.
And stopped almost in parallel with the bridge girder 53. Also, a small crane (not shown) is stopped on a road surface at an appropriate position inside or outside a bridge near the stop position of the traveling vehicle 4.

First, the cage support 3 is lifted by the small crane, the rear portion of the gantry 18 is positioned above the traveling vehicle 4, and the guide rails 19 and 19 are positioned above the balustrade 52 and the bridge girder 53. And the cage support 3
And the long cylindrical bodies 30, 30 of the mounting legs 20, 20 are lowered.
Is fitted to the cylindrical bodies 40, 40 of the leg mounting members 35, 35, and the guide rails 19, 19 are positioned outside the balustrade 52 and the bridge girder 53.

Next, the working cage 2 is lifted by the small crane, and the guide rails 19,
The main body support frame 6 is positioned above the upper part 19. Then, the work cage 2 is lowered, and the vertical rods 13
Into the guide grooves 19a, 19a of the guide rails 19, 19 to guide the work cage 2 up and down freely. Finally, if the hook 31 fixed to one end of the wire rope 22 is locked to the locking member 16 fixed to the main body support frame 6, the work cage elevating device 1 is assembled, and the work of laying the water pipe on the bridge girder 53 is performed. Preparation is completed.

At the time of laying work, the electric winch 21 is operated to pull the wire rope 22 and raise the work cage 2 along the guide rails 19, 19, and the floor plate 7 of the work cage 2 is placed on the upper surface of the bridge girder 53. When the worker arrives at substantially the same position as above, the operator gets over the balustrade 52 or dives into the working cage 2.

Next, the electric winch 21 is operated,
With the wire rope 22 pulled out, the work cage 2 is lowered along the guide rails 19, 19 and the work cage 2 is stopped at an appropriate height, and the worker installs a water pipe at an appropriate position of the bridge girder 53. I do.

When the work at one end of the bridge girder 53 is completed, the traveling trolley 4 is moved toward the center of the bridge while the stop position of the work cage 2 is maintained. A water pipe will be installed in the city. In the same manner, the carriage 4 is moved to the other end of the bridge in the same manner, and the worker sequentially installs a water pipe at an appropriate position of the bridge girder 53,
Water pipes are laid on the bridge girder.

As described above, since the work cage lifting / lowering device 1 of the present invention does not suspend the work cage 2 by locking the wire rope 22 to the balustrade 52 or the like, the shape of the balustrade 52 or the like can be reduced. Regardless of the strength, the worker can safely perform the laying work in the work cage 2. Then, by moving the traveling trolley 4, the work cage 2 can be easily moved along the bridge girder 53, and the time required for the laying work can be reduced.

Further, the working cage lifting / lowering device 1 of the present invention comprises:
Since the small traveling vehicle 4 is moved into the bridge and stopped, the laying operation can be performed without any problem even when the allowable load of the bridge is small and the width of the bridge is relatively small. Further, once the guide rails 19 and 19 are appropriately positioned outside the bridge girder 53 and the work cage 2 is stopped at an appropriate height, no particularly troublesome operation is required thereafter. When the floor plate 7 is raised and the floor plate 7 is positioned substantially at the same position as the upper surface of the bridge girder 53, the operator can easily get into the work cage 2 and is excellent in operability and workability.

Since the cage stopping rod 28 is provided at the lower end of the guide rails 19, 19, the lower rod 14 of the main body support frame 6 stops the cage even if the working cage 2 is lowered too much by mistake. There is no danger that the working cage 2 will strike the rod 28 and deviate from the guide rails 19, 19 and fall.

Further, the cage support 3 has four mounting legs 20, 20,...
20 is mounted on the leg mounting members 35 of the traveling carriage 4, so that the width of the balustrade 52 and the width of the bridge girder 53 are small and large.
The two mounting legs 20, 20 can be appropriately selected according to the presence or absence of a sidewalk in the bridge, which is extremely convenient.

Also, since the mounting leg 20 is formed by connecting the short cylindrical body 29 and the long cylindrical body 30, if the long cylindrical body 30 is prepared in several types, it can be appropriately adjusted according to the height of the balustrade 52. Since the long cylindrical body 30 can be selected, and there is no need to replace the traveling carriage 4, it is very convenient.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a working cage elevating device according to the present invention.

FIG. 2 is an external perspective view of a working cage.

FIG. 3 is an external perspective view of a cage support.

FIG. 4 is an external perspective view of the traveling vehicle.

FIG. 5 is a perspective view showing a state in which the working cage elevating device of the present invention is used for laying a water pipe on a bridge girder of a bridge constructed on a river.

[Explanation of symbols]

 Reference Signs List 1 work cage elevating device 2 work cage 3 cage support 4 traveling trolley 5 cage body 6 body support frame 13 vertical rod 14 lower rod 15 upper rod 16 locking member 18 gantry 19 guide rail 20 mounting leg 21 electric winch 22 Wire rope 25 Mounting table 28 Cage stop rod 29 Short cylindrical body 30 Long cylindrical body 31 Hook 35 Leg mounting member

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Jikken 46-11539 (JP, Y1) Special Table 4-502792 (JP, A) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B66F 9/06

Claims (1)

(57) [Claims] 1. A work cage comprising: a cage main body on which an operator rides; and a main body support frame in which an upper rod is connected to an upper end of a vertical rod provided in parallel and a locking member is fixed to the upper rod. A mounting table connected to the mounting table, a guide rail having an upper end fixed to a front end surface of the mounting table, and a guide rail for guiding the work cage up and down; a plurality of mounting legs fixed to the mounting table; A cage having a motorized winch placed on the vehicle, a wire rope having a hook fixed to one end thereof, and a traveling cart having a leg mounting member on which the mounting leg can be mounted. A work cage lifting / lowering apparatus, wherein a plurality of legs are provided more than a leg mounting member, and an attachment leg is appropriately selected so as to be freely mounted on the leg mounting member.