JP2003120198A - Working deck for shield machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a working deck for a shield machine capable of reducing a working load to a worker and improving workability. SOLUTION: Sliding scaffold devices 6, 7, and 8 are arranged in the working deck 3 part behind an elector device 4 so that the worker can carry out operation to a segment just as standing, independent of the arrangement height of a segment 2. Each of the scaffold devices 6, 7, and 8 is provided with a fixed scaffold 12, a fixed handrail 9, a movable scaffold 11, a movable handrail 10, a cutout part 11a arranged in the movable scaffold 11 for relieving a shape holding device in storage, and an opening cover 16 closing an opening formed by the cutout part 11a according to the sliding motion of the movable scaffold 11. The movable scaffold 11 and the movable handrail 10 are arranged in the fixed scaffold 12 and the fixed handrail 9 slidably in the longitudinal direction of the shield machine 1 and driven by a hydraulic jack 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work deck of a shield machine for fastening segments assembled by an erector device, the work deck being provided at the rear of the shield machine.

[0002]

2. Description of the Related Art As an example of a work scaffold for fastening segments assembled by an erector device, JP-A-8-3
There is an invention described in Japanese Patent No. 03194.

This prior art comprises a work deck installed behind a shield machine and a slide scaffolding attached to this work deck.

The slide scaffold is provided with a fixed base attached to the work deck, a movable base drive device supported by the fixed base, and a slidable arrangement on the fixed base, and is interlocked with the movable base drive device. It is composed of a movable table.

When the segment is fastened at a position distant from the work deck, the movable table driving device is actuated, the movable table is slid in the scheduled work direction, and then the operator moves onto the movable table. And perform the fastening work.

[0006]

However, with this conventional slide scaffolding, the operator can perform the work of standing on the segments arranged above the scaffolding, so that the work of fastening is extremely difficult. Easy, but
For fastening the segments placed at almost the same height as the slide scaffold, or at a slightly higher position,
Since the worker must perform the work in a very difficult state of the fastening work in a bent posture, there is a problem that the work burden on the worker is large and the work efficiency is poor.

The present invention has been made in view of the above problems, and an object thereof is to provide a work deck of a shield machine which can reduce work load on a worker and improve work efficiency. Especially.

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 is a shield machine for fastening a segment which is provided at the rear of a shield machine and which is assembled by an erector device. In the work deck of, at least a scaffolding device provided on the upper stage of the work deck and having a movable scaffold that slides with respect to the fixed scaffold, and a movable scaffolding provided below the scaffolding device and slidable with respect to the fixed scaffold It is configured to include one other scaffolding device.

In the invention according to claim 1 configured as described above, while the erector device is turning to assemble the segments, there is no movable scaffold on the path of the erector device, that is, the erector device is movable. The movable scaffold of the corresponding slide scaffolding device is housed on the fixed scaffold side so as not to contact the scaffold.

After the segment is arranged, an appropriate one of the upper slide scaffolding device and the slide scaffolding device below the upper slide scaffolding is selected according to the height position of the segment, and Slide the movable scaffold, transfer to the movable scaffold and perform the fastening work of the segment.

As a result, the worker does not have to perform the work in a very difficult state of the fastening work in a bent posture.
Therefore, the work load on the worker can be reduced and the work efficiency can be improved.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the movable scaffold slides in a propelling direction of the shield machine with respect to the fixed scaffold.

In the invention according to claim 3, the movable scaffold is
The invention according to claim 1 is characterized in that it slides in a direction orthogonal to the propelling direction of the shield machine with respect to the fixed scaffold.

The invention according to claim 4 is characterized in that, in the invention according to any one of claims 1 to 3, a handrail is provided on the movable scaffold.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the movable scaffold has a cutout portion for preventing interference with a shape retaining device that retains the segment in a circular shape during storage. It is characterized by having a cover that covers the notch when used.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a work deck of a shield machine according to the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an outline of a first embodiment of a work deck of a shield machine according to the present invention, FIG. 2 is a top view of the embodiment shown in FIG. 1, and FIG. 3 is a view showing the embodiment shown in FIG. 6 is a front view showing the slide scaffolding device provided, FIG. 4 is a side view showing the lower scaffolding device provided in the embodiment shown in FIG. 3, and FIG. 5 is a top view showing the scaffolding of the lower scaffolding device shown in FIG. 4;
6 is a side view showing the slide mechanism of the lower scaffolding device shown in FIG. 4, FIG. 7 is a view in the direction of arrow A of the structure shown in FIG. 6, and FIG.
FIG. 9 is an explanatory view showing the operation of the slide mechanism of the opening cover provided in the middle scaffolding device and the lower scaffolding device shown in FIG. 3, and FIG. 10 is a continuation of the operation shown in FIG. FIG. 11 is an explanatory diagram showing the continuation of the operation shown in FIG. 10.

In the first embodiment, as shown in FIGS.
The work deck 3 is provided in the shield machine 1 including the erector device 4 and the shape retaining device 5. The diameter of the shield machine 1 is, for example, about 5 m.

The erector device 4 is for arranging the segment 2 on the wall surface of the pit. The shape retaining device 5 presses the segment 2 against the wall surface of the pit to retain the annular portion formed by the segment 2 in a circular shape. The work deck 3 is used as a scaffold for workers.

As shown in FIGS. 1 to 3, the work deck 3 is provided at the rear portion of the erector device 4 with a slide scaffolding device 6.
~ 8 are provided. These slide scaffold devices 6 to 8 are devices that make it possible to provide a scaffold in a range overlapping the turning track of the erector device 4 and in a range on the outer peripheral side of the turning track of the erector device 4. The range R shown in FIG.
It is a range on the inner peripheral side of the turning trajectory of the elector device 4.

In the first embodiment, the above-mentioned slide scaffolding device 6 (hereinafter referred to as "upper stage scaffolding device 6") is provided on the upper stage of the work deck 3 so that the fastening work can be performed while standing on the segment 2 at any height position. Is provided, the above-mentioned slide scaffolding device 7 (hereinafter referred to as "middle-stage scaffolding device 7") is provided in the middle stage, and the above-mentioned slide scaffolding device 8 (hereinafter referred to as "lower-stage scaffolding device 8") is provided at the lower stage.

The scaffold devices 6 to 8 have the same structure. For example, as shown in FIG.
A fixed scaffold 12 fixed to the work deck 3, a movable scaffold 11 slidably provided on the fixed scaffold 12, a fixed handrail 9 provided on the fixed scaffold 12, and a movable handrail 10 slidably provided on the fixed handrail 9. It has and.

The fixed handrail 9 and the movable handrail 10 are made of tubular members such as pipes. As shown in FIG. 4, the fixed handrail 9 includes a plurality of, for example, two handrail portions 9a and 9b horizontally fixed to the work deck 3. Movable handrail 10
Includes handrail portions 10a and 10b slidably inserted into the handrail portions 9a and 9b of the fixed handrail 9, respectively.

The movable scaffold 11 described above, as shown in FIG. 5, has a notch portion 1 that avoids the shape retaining device 5 when stored.
1a is provided.

An opening cover 15 is provided between the fixed scaffold 12 and the movable scaffold 11 to close the opening formed by the cutout 11a when the movable scaffold 11 is slid forward of the fixed scaffold 12. .

Further, as shown in FIGS. 6 to 8, the movable scaffold 11 rotatably abuts on a guide rail 14 having a U-shaped cross section which is fixed below the fixed scaffold 12 and a lower surface of the movable scaffold 11. The guide roller 15 is provided so as to be slidable in the propulsion direction of the shield machine.

Below the movable scaffold 11 is the movable scaffold 1.
For example, a hydraulic jack 13 for driving 1 is provided. The hydraulic jack 13 has a plate-like member 20 in which the end portion of the rod 13 a is attached to the back surface of the front portion of the movable scaffold 11 with the direction of expansion and contraction aligned with the sliding direction of the movable scaffold 11 and bridged between the guide rails 14. It is fixed to. The hydraulic jack 13 is operated by an operation button (not shown).

Further, the above-mentioned opening cover 16 has the structure shown in FIGS.
As shown in FIG. 11, the collar 16a that rises at the rear end and the cover 16b that closes the above-described opening formed by the notch 11a of the movable scaffold 11 are provided, and operate as shown in FIGS.

First, as shown in FIG. 9, when the movable scaffold 11 is housed so as to overlap the fixed scaffold 12 below, the opening cover 16 serves as the movable scaffold 11 and the fixed scaffold 12.
It is stored between.

Next, as shown in FIG. 10, the movable scaffold 11
When the vehicle slides in the propulsion direction (direction of arrow V), the opening cover 16 is fixed to the fixed scaffold 1 together with the sliding movable scaffold 11.
2 comes out from below. Then, the brim portion 16a of the opening cover 16 is hooked on the front end of the fixed scaffold 12, whereby the opening cover 16 is locked in a state in which the entire cover portion 16b slides forward of the fixed scaffold 12.

Next, as shown in FIG. 11, the movable scaffold 11
Is further slid in the propelling direction (arrow W direction), the cover portion 16b of the opening cover 16 locked as described above.
An opening formed by the cutout portion 11a is located below, and the opening is closed.

The above-mentioned upper stage scaffolding device 6 and middle stage scaffolding device 7
Also, the lower stage scaffolding device 8 configured in this manner has the same configuration. However, as for the movable scaffold 11 of the upper scaffold device 6, the space for storing the movable scaffold 11 does not interfere with the position of the shape holding device 5, so that the cutout portion 11a and the lower scaffold device 8 are provided like the middle scaffold device 7 and the lower scaffold device 8. Opening cover 1
6 is not provided.

The present embodiment thus constructed is used as follows when the fastening operation of the segment 2 is performed.

First, while the eclectic device 4 is turning to arrange the segment 2, on the course of the eclectic device 4 so that the movable scaffold 11 of the scaffolding devices 6 to 8 does not come into contact with the turning erector device 4. The movable scaffold 11 at is stored below the fixed scaffold 12.

After the segment 2 is arranged, an appropriate one of the upper stage scaffolding device 6, the middle stage scaffolding device 7, and the lower stage scaffolding device 8 is selected according to the height position of the segment 2 and The movable scaffold 11 is driven and slid. Then, the worker moves to the movable scaffold 11 and performs the fastening operation of the segment 2.

As described above, in this embodiment, the movable scaffold 11 of the scaffolding devices 6 to 8 is selected according to the height position of the segment 2.
By selecting and using the appropriate one of
The worker does not need to perform the work in a very difficult state of the fastening work in a bent posture. Therefore, the work load on the worker can be reduced and the work efficiency can be improved.

Further, in this embodiment, since the fixed handrail 9 and the movable handrail 10 are provided, the safety of the operator can be secured.

Further, in this embodiment, since the movable scaffold 11 is provided with the cutout portion 11a, the length dimension in the front-back direction of the movable scaffold 11 portion located in front of the fixed scaffold 12 can be set to be long. As a result, the range of action of the worker can be expanded.

Further, in the present embodiment, the opening cover 16 automatically closes the opening formed by the notch 11a, so that the safety of the operator can be secured.

Next, a second embodiment, which is different from the above-mentioned embodiment, will be described with reference to the drawings.

FIG. 12 is a top view showing the second embodiment, and FIG.
FIG. 3 is a front view showing a slide scaffolding device provided in the embodiment shown in FIG. 12. The same components as those in the first embodiment are designated by the same reference numerals.

As shown in FIGS. 12 and 13, the second embodiment includes slide scaffolding devices 60 to 80 having a slide mechanism similar to that of the first embodiment. Further, in the slide scaffolding devices 60 to 80, it is possible to provide the scaffolding in the range overlapping with the turning track of the erector device 4 and in the range on the outer peripheral side of the turning track of the erector device 4, as in the first embodiment. It is a device that does.

In the second embodiment, unlike the first embodiment, the scaffolding devices 60 to 80 are provided in the work deck 3 portion located inside the turning track of the erector device 4, and the fixed scaffold 32 and the fixed handrail 29 are provided. A movable scaffold 31 and a movable handrail 30 slidably provided on these are provided.

That is, the scaffolding devices 60 to 80 are slide mechanisms similar to those in the first embodiment, but the movable scaffold 3 is used.
1 and the movable handrail 30 are provided so as to slide in a direction (arrows X, Y and Z directions) orthogonal to the propulsion direction of the shield machine 1.

Further, the arrangement of these scaffolding devices 60 to 80 is similar to that of the first embodiment, so that the slide scaffolding device 60 (hereinafter "The upper scaffolding device 60" is called)
And a slide scaffolding device 70 (hereinafter referred to as "middle stage scaffolding device 70") in the middle stage, and a slide scaffolding device 8 in the lower stage.
0 (hereinafter referred to as “lower scaffolding device 80”) is provided.

In the second embodiment thus constructed, the segments 2 arranged in the front row are arranged in the same manner as in the first embodiment.
By selecting and using an appropriate one of the scaffolding devices 60 to 80 according to the height position of the operator, it is necessary for the worker to perform a work in a very difficult state such as a fastening work in a bent posture. Absent. Therefore, the work load on the worker can be reduced and the work efficiency can be improved.

Further, the movable handrail 30 can ensure the safety of the worker.

In the above-described two embodiments, the example in which the three scaffold devices 6 to 8 or 60 to 80 are provided is given. However, the present invention is not limited to this, and more or less than three scaffolding devices may be provided depending on the diameter of the shield machine 1.

[0049]

As described above, in the invention according to each of the claims of the present invention, it is not necessary for the worker to perform the work in the very difficult state of the fastening work in the bent posture. Therefore, the work load on the worker can be reduced and the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a side view schematically showing a first embodiment of a work deck of a shield machine according to the present invention.

2 is a top view of the embodiment shown in FIG. 1. FIG.

FIG. 3 is a front view showing a slide scaffolding device provided in the embodiment shown in FIG.

FIG. 4 is a side view showing a lower scaffolding device included in the embodiment shown in FIG.

5 is a top view showing a scaffold of the lower scaffolding device shown in FIG. 4. FIG.

6 is a side view showing a slide mechanism of the lower scaffolding device shown in FIG. 4. FIG.

7 is a view on arrow A of the structure shown in FIG.

8 is a view in the direction of arrow B of the structure shown in FIG.

9A and 9B are explanatory views showing the operation of the slide mechanism of the opening cover provided in the middle stage scaffolding device and the lower stage scaffolding device shown in FIG. 3, FIG. 9A being a top view and FIG. 9B being a side view.

10 is an explanatory diagram showing a continuation of the operation shown in FIG.
(A) is a top view and (b) is a side view.

11A and 11B are explanatory diagrams showing the continuation of the operation shown in FIG. 10, in which FIG. 11A is a top view and FIG. 11B is a side view.

FIG. 12 is a second working deck of the shield machine of the present invention.
It is a top view showing an embodiment.

13 is a front view showing a slide scaffolding device provided in the embodiment shown in FIG.

[Explanation of symbols]

1 shield machine 2 segments 3 working deck 4 Electa device 5 Shape retention device 6 Upper scaffolding device (slide scaffolding device) 7 Middle stage scaffolding device (another slide scaffolding device) 8 Lower scaffolding device (another slide scaffolding device) 9 Fixed handrail 10 movable handrails 11 movable scaffolding 12 fixed scaffolding 60 slide scaffolding equipment 70 slide scaffolding equipment 80 slide scaffolding equipment 29 fixed scaffolding 30 movable handrails 31 movable scaffolding 32 fixed scaffolding

Claims (5)

[Claims] 1. A working deck of a shield machine, which is provided at the rear of the shield machine to fasten segments assembled by an erector device, the work deck being provided on an upper stage of the work deck and sliding with respect to a fixed scaffold. A working deck of a shield machine, comprising: a scaffolding device having a movable scaffolding; and at least one other scaffolding device provided below the scaffolding device and having a movable scaffolding that slides with respect to a fixed scaffolding. . 2. The work deck of a shield machine according to claim 1, wherein the movable scaffold slides in a propelling direction of the shield machine with respect to the fixed scaffold. 3. The work deck of a shield machine according to claim 1, wherein the movable scaffold slides in a direction perpendicular to the propelling direction of the shield machine with respect to the fixed scaffold. 4. The work deck of the shield machine according to claim 1, wherein a handrail is provided on the movable scaffold. 5. The movable scaffold has a notch portion for preventing interference with a shape retaining device that retains the segment in a circular shape during storage, and a cover for covering the notch portion when used. The working deck of the shield machine according to any one of claims 1 to 4.