JPH01318700A - Segment assembling device for shield excavator - Google Patents

Abstract

PURPOSE:To easily form excavation cross sections other than full-circular one by a method in which rails are set on the inner surface of the skin plate of shield frame, a slewing frame erector is movably attached, and a segment holder is set on the erector. CONSTITUTION:A ring girder 2 is projectionally set on the back inner surface of the skin plate 1 of shield frame of an oblong excavating cross section, a rail 3 is set on the inside of the girder 2, and a slewing frame erector 5 capable of holding segments 4 is movably attached to the rail 3. The segment 4 is supported by a slide frame 21 whose position is adjustable through a vertically movable frame 16 by an expandible jack 15 attached to an arm 14. The segment 4 carried in is connected to a bracket 20 to lift it up, swirled to an assembling position, stopped on a target position, and pressed on the inner wall of the plate 1 to assemble it with existing segment 4'.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a segment assembly device for a shield excavator suitable for construction of tunnels with non-perfect circular cross sections.

[Conventional technology] There are various types of conventional shield tunneling machines, such as Tonosho type shield, mud water pressurization type shield, manual digging, semi-mechanical digging, and mechanical digging type shield. It is for excavating.

Therefore, when assembling a segment in a hole after excavation, in any case, as shown in Figure 0, an annular erector support ring C is fixed to the inner circumference of the skin plate b of the shield frame a, An annular erector e is rotatably supported via a plurality of rollers d on the inner periphery of the erector support ring C, a segment gripper r is attached to the erector e, and a shield is attached to a gear provided on the inner periphery of the erector e. The pinion of the output shaft of a hydraulic motor fixed to the frame a is engaged, and the erector e holding the segment is rotated by a required angle to fit the segment into a predetermined position.

[Problem to be solved by the invention] However, in recent years, there have been many requests for tunnel construction with a width of three or more lanes one way, but when these wide tunnels are excavated with a perfectly circular shield excavator, the upper and lower parts are The excavation volume of unnecessary parts such as the top increases significantly, resulting in poor efficiency.

Therefore, it is conceivable to make the excavation cross-sectional shape elliptical, but in the structure of the conventional erector, there is a large difference between the vertical distance and the horizontal distance of the excavation cross-section, so it is impossible to assemble the segments in an oval shape. It is.

An object of the present invention is to enable segments to be easily assembled to excavation cross sections other than perfect circles.

[Means for Solving the Problems] The present invention provides a system in which a rail is installed in an annular or discontinuous annular shape on the inner periphery of a skin plate of a shield frame having an arbitrary excavation cross section, and has idle rollers in contact with the upper and lower surfaces of the rail, respectively. This invention relates to a segment assembly device for a shield excavator, characterized in that a revolving frame erector is movably attached to the rail, and a segment gripping tool is provided on the revolving frame erector.

[Operation] With the segment gripped by the segment gripping tool,
When the swivel frame erector is run, it swivels along the track of the rail and carries the segment to a predetermined position. Easy to assemble.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show an embodiment of the present invention. For example, a continuous or discontinuous annular ring girder 2 is installed on the rear inner circumferential surface of a skin plate l of a shield frame whose excavation cross-sectional shape is oval. A rail 3 is installed at the inner peripheral end of the ring girder 2 in an annular shape, that is, an ellipse, which is approximately similar to the cross-sectional shape of the skin play H, and a segment is provided on the rail 3. A rotating frame erector 5 capable of gripping the frame erector 4 is attached so as to be self-propelled.

The rotating frame erector 5 has a shape that straddles the rail 3, and has four guide rollers 6.7 on the front, rear, left and right sides of the rail 3.
Two guide rollers 8, front and rear, are provided so as to be in contact with the upper and lower surfaces of the rail 3, and are also in contact with both sides of the rail 3, respectively, so that the guide rollers 8 can move along the rail 3 without being restrained vertically or horizontally and shaking. do.

A gear 9 is provided approximately at the center in the width direction of the inner circumferential surface of the rail 3 over approximately the entire length of the rail 3, and a pinion 11 that is pivotally supported by the rotating frame erector 5 via a shaft IO is meshed with the gear 9. the shaft lO to the hydraulic motor 1.
The rotary frame erector 5 is connected to the rotary shaft 13 of the rotary frame erector 2 so as to be able to move on its own.

The segment gripping structure of the rotating frame erector 5 is substantially the same as the conventional one, and allows the lifting frame 16 to be raised and lowered by a telescopic jack 15 attached to the arm 14 while being guided by a guide rod 17 and a bearing 18. The lifting frame 16 has a bracket 1 for supporting the segment 4.
A sliding frame 21 having a bracket 20 that can be connected to 9 with a pin 25 is attached along a guide bar 22 with a sliding jack 23 so that the position can be adjusted. It has a support jack 24 for steadying the segment 4.

With the above configuration, segments 4 of various curvatures brought in from the starting end of an existing tunnel can be connected to the brackets 19 of the segments 4 and the brackets 2 of the sliding frame 2I.
0 by a pin 25, and a support jack 24 is protruded to prevent the segment 4 from steadying. The alignment during the pin connection is performed by raising and lowering the elevating frame 16 by protruding and retracting the telescoping jack 15, and by moving the sliding frame 21 along the guide bar 22 by the sliding jack 23.

Next, the elevating frame 16 is moved by the telescopic jack 15.
When the segment 4 is raised, the segment 4 can be lifted without shaking.

After that, when the pinion 11 is rotated by the hydraulic motor 12 through the shirt eye 0, the pinion 11 is meshed with the gear 9 on the surface of the rail 3 and the rotating frame erector 5 is rotated.
The guide rollers G, 7.8 contact the upper surface, lower surface, and side surface of the rail 3, respectively, and are movable without wobbling, so that the rotating frame erector can be rotated according to the direction and amount of rotation of the hydraulic motor 12. 5 is pivoted along the rail 3 while holding the segment 4 to the installation position of the segment 4.

After stopping at the target position, extend the telescopic jack 15,
The guide rod 17 is guided by the bearing 18, and the elevating frame 1B moves outward, and the segment 4 is pressed against the inner wall of a predetermined skin plate l and assembled to the existing segment 4°. The position adjustment of the segment 4 is performed by the telescopic jack 15 and the sliding jack 23 in the same way as when gripping the segment 4.

After assembling the segment 4 in a predetermined position, the segment 4 and the rotating frame erector 5 can be uncoupled by pulling out the pin 25 and loosening the support jack 24, and the rotating frame erector 5 can be returned to the original segment station. By returning to the original position, the next segment 4 can be assembled.

Furthermore, by providing two, three, or a large number of rotating frame erectors 5, it is possible to efficiently assemble the segments corresponding to -the excavation stroke in sequence.

The newly assembled segment and the existing segment are brought into close contact with each other by a reaction force when the shield frame moves forward, and are fitted with bolts.

FIG. 6 shows a second embodiment of the present invention, and is an example of a shield frame 26 having substantially the same configuration as the first embodiment, but with a rectangular excavation cross-sectional shape.

This is an example in which a rail 28 is constructed in an oval shape by a girder 29 on the inner periphery of a skin plate 27 having a rectangular cross section, and a swing frame erector 30 is attached to the rail 28.

In the case of this embodiment, as shown in FIG. 7, the segments 31 and 32 having a flat plate shape and a cross-section shape can be assembled into a rectangular cross-section.

FIG. 8 shows a third embodiment of the present invention, which has substantially the same configuration as the first embodiment, but is applied to a shield frame 33 with an oval excavation cross section. That is, this is an example in which a rail 35 is constructed in an oval shape by a girder 36 on the inner periphery of a skin plate 34 having an oval cross section, and a swing frame erector 37 is attached to the rail 35.

FIG. 9 shows a fourth embodiment of the present invention, which has substantially the same configuration as the first embodiment, but is applied to a shield frame 38 having a gourd-shaped excavation cross section. In other words, the rail 4 is attached to the inner circumference of the skin plate 39, which has a gourd-shaped cross section.
0 is constructed in a gourd shape by a girder 41, and a rotating frame erector 42 is attached to the rail 40.

Incidentally, the segment assembly device for a shield tunneling machine of the present invention is as follows:
The cross-section of the skin plate is not limited to the above-mentioned embodiments, and the cross-section of the skin plate may have any shape, and the rail may not necessarily be similar to the cross-section of the skin plate if it is annular or discontinuously annular. Various changes may be made without departing from the gist of the present invention, such as that the rotating frame erector may be towed by a chain, and that it may be applied to shield excavators of various types of excavation. Of course.

[Effects of the Invention] As explained above, according to the segment assembly device for a shield excavator of the present invention, a rail constructed over almost the entire circumference of the skin plate of a shield frame having an arbitrary excavation cross section, Since the revolving frame erector is mounted so that it can travel, the revolving frame erector that grips the segment travels to any position on the rail to remove the segment,
Therefore, it is possible to easily assemble tunnel segments having any excavation cross-sectional shape. For example, when the excavation cross-sectional shape is oval, a multi-lane road tunnel can be efficiently constructed.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the first embodiment of the device of the present invention, Fig. 2 is a detailed view of the section ``■'' in Fig. 1, Fig. 3 is a view taken in the direction of the -■ arrow in Fig. 2, and Fig. 4 is a 3 is a view in the IV-IV direction, FIG. 5 is a view in the v-■ direction in FIG. FIG. 8 is an explanatory diagram of the third embodiment of the apparatus of the present invention, FIG. 9 is an explanatory diagram of the fourth embodiment of the apparatus of the present invention, FIG. 1O is a diagram showing an example of a conventional segment assembly device. 1.27, 34.39 are skin plates, 2 is ring girder, 3.2g, 35.40 is rail, 5, 30, 37
．． 42 is a rotating frame erector, 9 is a gear, 11 is a pinion, 12 is a hydraulic motor, and 29.36.41 is a girder.

Claims (1)

[Claims] 1) Rails are installed in an annular or discontinuous annular manner on the inner periphery of the skin plate of a shield frame having an arbitrary excavation cross section, and a revolving frame erector having guide rollers in contact with the upper and lower surfaces of the rails can run on the rails. 1. A segment assembly device for a shield excavator, characterized in that the rotating frame erector is equipped with a segment gripping tool.