JP2010255246A - Scaffold apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scaffold apparatus which improves work efficiency in the excavation and inspection of a natural ground. <P>SOLUTION: Work stages 4 are arranged in a row with their work benches 20 set identical in height. In this state, when a motor 26 is turned on, auxiliary stages 23a and 23b extend leftward and rightward near the natural ground A, and the auxiliary stages 23a and 23b come up to locations in front of frame posts 3c and 3d, respectively. As a result, auxiliary stages 23a and 23b adjacent to each other approach each other in front of the frame posts 3c and 3d. This allows a worker to walk along the auxiliary stages 23a and 23b to easily move to a workbench 20 of an adjacent work stage 4, and thus eliminates a need in a conventional case of moving up and down the work stage for each bit chamber S. The worker is allowed to carry out the excavation and inspection of the natural ground A while moving laterally across the workbench 20 for each bit chamber S, thus enjoying extremely high work efficiency and a safe work environment. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a working scaffold device used in a propulsion method for constructing a tunnel-like underground structure while pushing a concrete box in the ground.

  Conventionally, there exists Unexamined-Japanese-Patent No. 2008-231862 as a technique of such a field | area. The scaffolding platform (working stage) described in this publication is arranged for each of the three blade chambers arranged in parallel at the front end of the box. On this scaffolding frame, a scaffolding member with a wire mesh attached to a frame member is attached so as to be movable in the front-rear direction. Therefore, by moving the scaffold member so as to approach the natural ground, the worker can easily dig up the natural ground, and can check the state of the natural ground.

JP 2008-231862 A

  However, in the scaffolding platform having such a configuration, workers can approach during excavation work and inspection work of natural ground, but when excavation work and inspection work of natural ground are performed for each blade chamber. The scaffold must be raised and lowered for each blade chamber, and there is a problem that work efficiency is poor. Further, since the adjacent scaffolding stands are separated by a predetermined distance, it is not preferable for the worker to jump to the neighboring scaffolding stands, and such an action must be avoided.

  An object of this invention is to provide the scaffold apparatus which made favorable the working efficiency at the time of excavating or inspecting a natural ground.

The present invention is a scaffold apparatus having a work stage provided with a work table, arranged for each blade chamber provided in parallel at the front end of the box.
A lifting device that lifts and lowers the work stage along the frame pillar of the blade frame forming the blade chamber;
And an auxiliary stage which is disposed on the front side of the work table and widens in the horizontal direction to the front of the frame pillar in the transverse direction of the box.

  Since the auxiliary stage arranged on the front side of this scaffolding device expands in the horizontal direction to the front of the frame pillar in the transverse direction of the box, the auxiliary stage is set in the widened state with the height of the adjacent work stages being aligned. Then, the worker can easily move to the adjacent work table through the auxiliary stage. Therefore, there is no need to raise and lower the work stage for each blade chamber, and since the excavation work and inspection work of the natural ground can be performed while moving the work stage horizontally for each blade chamber, the work efficiency is extremely good. Moreover, the work can be performed safely.

The widening device for widening the auxiliary stage includes a motor fixed to the work table, a screw shaft extending in the transverse direction and rotated by the motor, and a female screw provided on the auxiliary stage and screwed to the screw shaft. It is suitable if it is comprised by the part.
When such a configuration is adopted, the auxiliary stage can be reciprocated along the screw shaft by rotating the motor shaft forward and backward. Therefore, when the work stage work table is away from the ground, the auxiliary stage is stored in the work stage, and when the work stage work table is approaching the ground, the auxiliary stage is moved laterally from the work stage. Can be widened.

The lifting device preferably includes a rack extending along the frame column, a pinion provided on the work stage and meshing with the rack, and a motor for rotating the pinion.
If such a structure is employ | adopted, a work stage can be raised / lowered reliably electrically.

In addition, it is preferable that the work table of the work stage is moved forward and backward by an electric cylinder.
By using the electric cylinder, the operation of moving the work stage worktable away from the natural ground or bringing the work stage worktable close to the natural ground can be reliably and electrically performed.

  According to the present invention, it is possible to improve the efficiency of various operations such as excavation work and inspection work of natural ground.

It is a front view which shows the structure to which the scaffold apparatus concerning this invention is applied. It is a side view which shows a work stage. It is a top view which shows a work stage. It is a top view which shows the state which the auxiliary stage expanded. It is the bottom view which looked at the auxiliary stage from the back side. It is a top view which shows operation | movement of a work table.

  Hereinafter, preferred embodiments of a scaffold device according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a structure used for the R & C method. This R & C method protects a line and the like with a square roof R formed by arranging square steel pipes 1 in cross section, and this square roof R This is a construction method in which the box 2 is buried under the track while being pushed out by the box 2.

  Three blade edges 5 formed by arranging sheet piles 5a in a rectangular shape are arranged in parallel at the front end of the box 2, and each blade edge 5 is attached to a blade frame 3 attached to the front end of the box 2. Each is fixed. Each blade edge frame 3 forms a rectangle by an upper frame 3a, a lower frame 3b, and a pair of left and right frame pillars 3c, 3d, and a space surrounded by the blade edge frame 3 is formed as a blade edge chamber S. In the blade chamber S, the work stage 4 moves up and down along the frame columns 3c and 3d.

As shown in FIGS. 2 and 3, the scaffold device 10 is installed for each blade chamber S and includes a lifting device 11 for lifting the work stage 4. The lifting device 11 includes a motor 13 fixed to the base 12 of the work stage 4, a pinion 14 rotated by the motor 13,
Fixed to one frame pillar 3c via a bracket 15a, extends vertically along the frame pillar 3c, and is fixed to the other frame pillar 3d via a bracket 16a and a rack 15 that meshes with the pinion 14, A pair of left and right guide rails 16 extending in the vertical direction along the frame pillar 3 c and the frame pillar 3 d and a pair of left and right guide rollers 17 provided on the base 12 and sliding along the guide rail 16 are provided. ing.

  The left and right frame columns 3c and the frame columns 3d are arranged in the forward inclined state at the same angle, and the rack 15 and the guide rail 16 extend in parallel to the frame columns 3c and 3d. A motor 13 is disposed on the back side of the base 12 of the work stage 4, and the output of the motor 13 is transmitted to the pinion 14 via the speed reduction mechanism 18, and the pinion 14 is meshed with the rack 15. Therefore, the work stage 4 can be stopped at an arbitrary height by turning on and off the motor 13.

  Further, a work table 20 that moves forward and backward along a guide rail extending in the horizontal direction on the base 12 is disposed on the work stage 4, and this work table 20 provided with a handrail 20 a is attached by an electric cylinder 21. It can be stopped at any position in the horizontal direction. One end of the electric cylinder 21, that is, the motor 21 a side is fixed to the base 12, and the other end of the electric cylinder 21, that is, the cylinder 21 b side is fixed to the work table 20. Therefore, the work table 20 can be moved back and forth by turning on and off the motor 21a of the electric cylinder 21, and the work table 20 can be moved forward and moved away from the natural ground A when working close to the natural ground A. The work table 20 can be moved backward when the stage 4 is raised and lowered.

  As shown in FIGS. 4 and 5, a step plate 22 extending in the lateral direction is disposed on the front side of the work table 20 in a state in which a wire mesh is stretched on the frame member, and the step plate 22 includes auxiliary stages 23 a, A widening device 24 for widening 23b in the lateral direction is provided. The auxiliary stages 23a and 23b can be projected and retracted from both side ends of the step plate 22, and are projected from both side ends of the step plate 22 when necessary (during excavation work or inspection work), and when not necessary (work table). 20), it is stored on the back side of the step plate 22.

  The auxiliary stages 23a and 23b are arranged on the left and right of the step plate 22 of the work table 20, and one auxiliary stage 23a is expanded in the horizontal direction to the front of the frame column 3c in the transverse direction of the box 2, and the other auxiliary stage 23a. The stage 23b is widened in the horizontal direction up to the front of the frame column 3d in the transverse direction of the box 2. That is, one auxiliary stage 23a spreads to the left when viewed from the operator in front of the blade edge 5 fixed to the frame column 3c, and the other auxiliary stage 23b is in front of the blade edge 5 fixed to the frame column 3d. And spread to the right as seen from the operator.

  As shown in FIG. 5, the widening device 24 includes a motor 26 fixed to the back surface of the step plate 22 of the work table 20, extends in the transverse direction, and rotates via the bevel gear by the motor 26. The screw shafts 27a and 27b are threaded in the opposite directions on the left and right sides, and female screw portions 28a and 28b are provided on the auxiliary stages 23a and 23b and screwed onto the screw shafts 27a and 27b.

  By rotating the shaft of the motor 26 in the forward direction, the screw shaft 27a and the screw shaft 27b rotate in the same direction at the same time, and the screw shaft 27a and the screw shaft 27b are in the reverse screw state. , 23b move away from each other, whereby the auxiliary stages 23a, 23b approach the front of the frame columns 3c, 3d.

  On the other hand, if the work table 20 is retracted in a state where the auxiliary stages 23a and 23b protrude to the front of the frame columns 3c and 3d, the auxiliary stages 23a and 23b collide with the blade edge 5, and therefore the motor 26 The auxiliary stages 23 a and 23 b are synchronously stored on the back side of the step plate 22 by reversing the shaft.

  When the work table 20 is separated from the natural ground A (see FIG. 6A), the work table 20 is moved to the vicinity of the natural ground A in front of the blade edge by turning on the motor of the electric cylinder 21 (see FIG. 6). 6 (b)). Then, when the motor 26 is turned on with the height of the work table 20 of each of the three work stages 4 being aligned, the auxiliary stages 23a and 23b spread left and right near the natural ground A, and the auxiliary stage 23a and the auxiliary stage 23b approaches the front of the frame pillars 3c and 3d. Then, the adjacent auxiliary stages 23a and 23b approach each other in front of the frame pillars 3c and 3d (see FIG. 6C).

  Therefore, the worker can easily move to the work table 20 of the adjacent work stage 4 through the auxiliary stages 23a and 23b, and there is no need to raise and lower the work stage for each blade chamber S as in the prior art. The operator can perform excavation work and inspection work of the natural ground A while moving the work table 20 side by side for each blade chamber S, so that the work efficiency is extremely good and the work can be performed safely. it can.

  The raising / lowering of the work stage 4, forward / backward movement, and widening on / off operations may be performed either on the work stage 4 or outside the work stage 4. The operation panel is preferably a pendant switch type, and can be operated at any position within the range of the switch wiring, and it is preferable that only the operable button is lit.

  DESCRIPTION OF SYMBOLS 2 ... Box, 3 ... Blade edge frame, 3c, 3d ... Frame pillar, 4 ... Work stage, 5 ... Blade edge, 10 ... Scaffolding device, 11 ... Lifting device, 12 ... Base, 13 ... Motor, 14 ... Pinion DESCRIPTION OF SYMBOLS 15 ... Rack, 18 ... Deceleration mechanism, 20 ... Work table, 21 ... Electric cylinder, 23a, 23b ... Auxiliary stage, 24 ... Widening device, 26 ... Motor, 27a, 27b ... Screw shaft, 28a, 28b ... Female screw part , A ... Chiyama, S ... The blade chamber.

Claims (4)

In the scaffold apparatus having a work stage provided with a work table, arranged for each blade chamber provided in parallel at the front end of the box,
A lifting device that lifts and lowers the work stage along a frame column of a blade edge frame forming a blade edge chamber;
An auxiliary stage disposed on the front side of the workbench and extending horizontally in the transverse direction of the box to the front of the frame column. A widening device for widening the auxiliary stage,
A motor fixed to the workbench;
A screw shaft extending in the transverse direction and rotated by the motor;
The scaffold device according to claim 1, comprising a female screw portion provided on the auxiliary stage and screwed onto the screw shaft. The lifting device is
A rack extending along the frame pillar;
A pinion provided on the work stage and meshing with the rack;
The scaffold device according to claim 1, further comprising: a motor that rotates the pinion.   The scaffold device according to any one of claims 1 to 3, wherein the work table of the work stage is moved forward and backward by an electric cylinder.

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