JPH0657996U - Screw conveyor moving device for shield machine - Google Patents

Abstract

(57) [Summary] [Purpose] During curve construction, the rear end of the screw conveyor should be easily moved to a position where it does not interfere with the segment. [Structure] The earth and sand excavated by a cutter head 4 provided at the front part of a flexible shield body 1 and taken into a chamber 1d in the shield body 1 are discharged from the chamber 1d by a screw conveyor 5. In the shield machine, the support member 7 supporting the screw conveyor 5 is detachably attached to the base 1e by the fixing bolts 8, and the segment 13 is assembled along the inner wall of the tunnel excavated by the shield body 1. By connecting the erector 12 and the screw conveyor 5 so that they can be separated from each other by the connecting member 16, the segment conveyor 12 can be used to easily move the screw conveyor 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a screw conveyor moving device for a shield machine, which enables a screw conveyor for discharging earth and sand to be easily moved.

[0002]

[Prior art]

 Conventional shield excavators that can be installed on sharp curves have a shield main body that is divided into, for example, a front shield, an intermediate shield, and a rear shield. The tunnel is constructed so that it can be excavated along a curved line. Further, a cutter head is rotatably provided on the front shield, and the earth and sand excavated by the cutter head are taken into the chamber of the front shield and then discharged from the chamber by the screw conveyor, and further the belt conveyor. It is designed to be transported to the rear by a sediment transport device such as.

Further, when a sharp curve with a radius of R12m or less is constructed, the rear end of the screw conveyor interferes with the segment assembled along the inner wall of the tunnel, making it difficult to excavate. For this reason, conventionally, the screw conveyor was lifted using a chain block or the like, and the rear end of the screw conveyor was shifted to the left or right to prevent the rear end of the screw conveyor from interfering with the segment.

[0004]

[Problems to be solved by the device]

 However, in the method of suspending a screw conveyor using a chain block as in the above-mentioned conventional method, a hook for hanging the chain block needs to be welded to a part of the shield body, which is troublesome and narrow. The work of hoisting the screw conveyor using a chain block at a location took time and was inefficient. The present invention has been made in order to solve such a problem, and an object thereof is to provide a screw conveyor moving device for a shield machine, which enables easy movement of the screw conveyor.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, this invention discharges the earth and sand excavated by a cutter head provided in the front part of a flexible shield body and taken into the chamber in the shield body from the chamber by a screw conveyor. In the shield machine, the support member that supports the screw conveyor is detachably attached to the base with the fixing bolts in the left-right direction, and the segment body is assembled into segments along the inner wall of the tunnel excavated by the shield body. Between the screw conveyor and the screw conveyor, the screw conveyor is moved by utilizing the function of moving the erector in the radial direction by using a connecting member.

[0006]

[Action]

 With the above configuration, the screw conveyor can be moved to the left or right by using the segment erector, so that the moving work can be easily performed in a short time.

[0007]

【Example】

 An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a shield machine, in which 1 indicates a shield body. The shield body 1 is divided into a front shield 1a, an intermediate shield 1b and a rear shield 1c, and a plurality of articulate cylinders 2 provided inside the intermediate shield 1b allow the shields 1a, 1b, There is flexion between 1c. A cutter head 4 driven by a cutter head motor 3 is provided on the front surface of the front shield 1a, and the earth and sand excavated by the cutter head 4 is stored in a chamber 1d provided in the front shield 1a. After being taken in, it is discharged from the chamber 1d by the screw conveyor 5 and further conveyed backward by a sediment carrying device such as a belt conveyor (not shown).

The screw conveyor 5 comprises a casing 5a inclined so that its front end side is lowered, and a screw 5b provided in the casing 5a. The screw 5b is driven by a motor 6 provided at the rear end side of the casing 5a. While being driven to rotate, a substantially intermediate portion of the casing 5a is supported by the support member 7. As shown in FIG. 3, the support member 7 has a substantially L-shape, is installed on both sides of the casing 5a, and has a length into which the pivot 5c protruding from the outer peripheral portion of the casing 5a is fitted. The hole 7a is formed horizontally in the propulsion direction.

Further, a plurality of bolt holes 7b are formed in the lower portion of the support member 7, and the lower portion of the support member 7 is set to the inner lower portion of the rear shield 1c by the fixing bolts 8 inserted into these bolt holes 7b. It is fixed to the upper surface of the protruding base 1e. The support member 7 is slidable in the left-right direction on the base 1e by removing the fixing bolt 8, and the base 1e has a screw hole 1f for fixing the support member 7 at the moving position. A plurality of fixing bolts 8 are formed so that the fixing bolts 8 can be screwed into the screw holes 1f.

On the other hand, reference numeral 10 in the figure is an inspection window provided on the outer peripheral surface of the casing 5 a, and the inside of the casing 5 a can be inspected through the inspection window 10 and a hook 11 is provided below the inspection window 10. Is provided. Reference numeral 12 in the drawing denotes a segment erector in which the shield body 1 assembles the segment 13 along the inner wall of the excavated tunnel. Hooks 15 are also provided on the 12 lifting frames 12a.

To explain the operation, the screw conveyor 5 is fixed substantially at the center of the shield main body 1 at the time of straight line construction, but the rear end of the screw conveyor 5 is fixed at the time of sharp curve construction with a curve radius of R12 m or less. A sharp curve cannot be constructed due to interference with the already assembled segment 13. Therefore, first, the fixing bolt 8 that fixes the lower portion of the support member 7 is removed, and then the turning ring 14 is turned to move the segment elector 12 to the horizontal position in the bending direction. In this state, as shown in FIG. 4, the hook 11 on the lower side of the inspection window 10 and the hook 15 of the segment erector 12 are connected using a connecting member 16 such as a shackle. It extends and moves the elevating frame 12a to the left. As a result, the rear end side of the screw conveyor 5 moves to the left. Therefore, when the rear end is moved to a position where it does not interfere with the segment 13, the fixing bolt 8 is screwed into the screw hole 1f of the base 1e, and the screw is moved to that position. The support member 7 may be fixed.

[0012]

[Effect of device]

 As described in detail above, this invention uses a segment erector that assembles segments along the inner wall of the tunnel and connecting fittings to make the rear end side of the screw conveyor movable in the left-right direction. There is no need to use a jack or chain block to lift the screw conveyor. This eliminates the need to weld the hook that suspends the chain block to the rear shield, which saves the preparation work and allows the screw conveyor to be moved by operating the segment erector at a remote position. It eliminates the need for work in places, and enables mobile work to be performed efficiently in a short time.

[Brief description of drawings]

FIG. 1 is a sectional view of a shield machine according to an embodiment of the present invention.

FIG. 2 is a side view of a screw conveyor moving device according to an embodiment of the present invention.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is an operation explanatory view of a screw conveyor moving device according to an embodiment of the present invention.

[Explanation of symbols]

 1 Shield Main Body 1d Chamber 1e Base 4 Cutter Head 5 Screw Conveyor 7 Support Member 8 Fixing Bolt 12 Segment Elector 13 Segment 16 Connecting Member

Claims (1)

[Scope of utility model registration request] 1. A shield body 1 is excavated by a cutter head 4 provided at a front portion of a flexible shield body 1.
In the shield excavator in which the earth and sand taken into the chamber 1d therein is discharged from the chamber 1d by the screw conveyor 5, the front part of the casing 5a of the screw conveyor 5 is spherically supported and the middle part is supported. The support member 7 for detaching is detachably attached to the base 1e by the fixing bolts 8 and the segment erector 12 for assembling the segment 13 along the inner wall of the tunnel excavated by the shield body 1 and the screw conveyor 5 are connected to each other. A screw conveyor moving device for a shield machine, which is detachably connected by 16.