JP2008240351A - Erector of shield machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To supply a segment from the rear by using an erector. <P>SOLUTION: This erector comprises: a base frame 2 which is arranged in a shield frame of a shield machine and elongated in the longitudinal direction of the shield frame; an annular supporting frame 3 which is mounted on the base frame 2 in such a manner as to be movable in the longitudinal direction of the shield frame; an annular rotary frame 4 which is mounted on the outer periphery of the supporting frame 3 in such a manner as to be rotatable in the circumferential direction of the shield frame; a lifting beam 5 which is mounted on the outer periphery of the rotary frame 4 in such a manner as to be movable in the radial direction of the shield frame; a holding portion 6 which is provided on the lifting beam 5 so as to hold the segment; and an actuator 7 for moving the supporting frame 3 in the longitudinal direction of the shield frame with respect to the base frame 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an shield digging machine erector for assembling segments along an inner wall of a tunnel, which is provided in a shield digging machine.

  A conventional shield machine erector is, for example, a shield frame of a shield machine, a plurality of support rollers provided along the circumferential direction of the shield frame, and supported by the inside of the support rollers. A rotating frame that is rotatable in the direction, a bracket that is attached to the rotating frame and protrudes rearward, a hanging beam that is attached to the tip of the bracket and is movable in the radial direction of the shield frame, and the hanging beam It is provided so as to be movable in the front-rear direction of the shield frame, and includes a gripping part that grips the segment (see Patent Document 1, etc.).

  In this erector, first, the rotating frame is rotated so that the gripping portion is directed downward, and then the gripping portion is lowered by the hanging beam and the segment is gripped by the gripping portion. Then, the gripping portion is lifted by the hanging beam, and the rotating frame is rotated so that the gripping portion faces a predetermined position (segment assembly position), and then the gripping portion is moved outward in the radial direction of the shield frame by the hanging beam. The segments are assembled along the inner wall of the tunnel.

Japanese Patent Laid-Open No. 9-242494

  By the way, in recent years, there is a demand for omitting a segment supply device that supplies segments to the erector from the rear for cost reduction and the like. Therefore, it is conceivable to omit the segment supply device and increase the amount of movement of the shield frame in the front-rear direction in the gripping part, and supply the segment using an erector. The extension jack is used to move the gripping part, and if the amount of movement of the shield frame in the front-rear direction is increased, the extension jack that moves the gripping part in the front-rear direction of the shield frame becomes longer. there were.

  Therefore, an object of the present invention is to provide an erector of a shield machine capable of supplying segments from the rear.

  To achieve the above object, the present invention provides a base frame that is disposed in a shield frame of a shield machine and extends in the front-rear direction of the shield frame, and is attached to the base frame. An annular support frame that is movable in the front-rear direction, an annular rotary frame that is attached to the outer periphery of the support frame and is rotatable in the circumferential direction of the shield frame, and is attached to the outer periphery of the rotary frame, A suspension beam that is movable in the radial direction, a grip portion that is provided on the suspension beam and grips a segment, and an actuator that moves the support frame in the front-rear direction of the shield frame relative to the base frame. It is provided.

  Here, the actuator includes a rack provided on the base frame along the front-rear direction of the shield frame, and a pinion attached to a drive motor attached to the support frame and meshing with the rack. It may consist of a rack and pinion mechanism.

  According to the present invention, there is an excellent effect that a segment can be supplied from behind using an erector.

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a plan view of an erector according to an embodiment of the present invention. 2 is a view taken along the line II-II in FIG. 3 is a view taken along the line III-III in FIG.

  As shown in FIG. 1 to FIG. 3, the erector 1 of the shield machine according to the present embodiment is fixed to a shield frame (not shown) of the shield machine, and the longitudinal direction of the shield frame (the horizontal direction in FIG. 1). ) Extending to the base frame 2, an annular support frame 3 attached to the base frame 2 and movable in the front-rear direction of the shield frame, and attached to the outer periphery of the support frame 3 in the circumferential direction of the shield frame A rotatable annular rotating frame 4, a suspension beam 5 attached to the outer periphery of the rotation frame 4 and movable in the radial direction of the shield frame, and a segment (not shown) to be assembled are provided on the suspension beam 5. A grip 6 and an actuator 7 for moving the support frame 3 in the front-rear direction of the shield frame with respect to the base frame 2 are provided.

  In the present embodiment, a pair of base frames 2 are provided in the tunnel width direction (vertical direction in FIG. 1). A pair of support frames 3 are provided in the front-rear direction of the shield frame.

  Rails 8 are laid on the base frame 2 along the front-rear direction of the shield frame. The support frame 3 is provided with legs 9 that can run along rails 8 laid on the base frame 2.

  The rails 8 are provided on the upper and lower surfaces of the base frame 2 in parallel with each other. Each leg portion 9 is provided so as to be able to travel along each rail 8. In addition, each leg portion 9 is provided between the pair of support frames 3.

  The rotating frame 4 is disposed concentrically with respect to the support frame 3. The rotating frame 4 is provided between the pair of support frames 3.

  A first roller 10 that contacts the outer peripheral surface of the support frame 3 is attached to the rotating frame 4. A plurality of first rollers 10 are provided at predetermined intervals in the circumferential direction of the shield frame. The rotating frame 4 is supported by the support frame 3 through these first rollers 10.

  A second roller 11 that contacts the outer surface of the support frame 3 is attached to the rotating frame 4. A plurality of second rollers 11 are provided at predetermined intervals in the circumferential direction of the shield frame. The rotating frame 4 is supported by the support frame 3 through these second rollers 11. The second rollers 11 also function as a stopper for restricting the displacement of the shield frame in the front-rear direction with respect to the support frame 3 of the rotating frame 4.

  A gear (internal gear) 12 is attached to the rotating frame 4 so as to be positioned between the pair of support frames 3. The gear 12 is meshed with a pinion 14 mounted on a drive motor 13 (hydraulic motor in this embodiment) provided on the support frame 3. A plurality of drive motors 13 are provided at predetermined intervals in the circumferential direction of the shield frame.

  By driving these drive motors 13, the rotary frame 4 is rotated in the circumferential direction of the shield frame with respect to the support frame 3.

  The suspension beam 5 is provided with a guide rod 15 that is slidably supported by the rotating frame 4. A telescopic jack 16 (hydraulic jack in the present embodiment) arranged in parallel along the guide rod 15 is provided between the suspension beam 5 and the guide rod 15.

  The guide rods 15 are provided in parallel to each other at both ends of the suspension beam 5. Each of the telescopic jacks 16 is provided between the suspension beam 5 and the guide rod 15 so as to be adjacent to each guide rod 15.

  The suspension beam 5 is moved in the radial direction of the shield frame with respect to the rotating frame 4 by extending and contracting each of the extension jacks 16.

  In the present embodiment, a vacuum device having a vacuum mechanism that sucks the inner surface of the segment is used as the grip portion 6.

  The actuator 7 according to the present embodiment is mounted on a rack 17 provided on the base frame 2 along the front-rear direction of the shield frame, and a drive motor 18 (hydraulic motor in the present embodiment) attached to the support frame 3. The rack and pinion mechanism includes a rack 17 and a pinion 19 that meshes with the rack 17.

  The racks 17 are provided in parallel to each other on the upper surface of each base frame 2. A plurality of drive motors 18 are provided at predetermined intervals in the circumferential direction of the shield frame.

  By driving these drive motors 18, the support frame 3 is moved in the front-rear direction of the shield frame with respect to the base frame 2.

  Here, in this embodiment, a pair of support frame 3, the rotation frame 4, the suspension beam 5, and the holding part 6 are arrange | positioned along the radial direction of a shield frame. Specifically, the pair of support frames 3, the rotation frame 4, the suspension beam 5, and the gripping portion 6 are arranged with the center of the shield frame in the front-rear direction (center of gravity) in the pair of support frames 3 and the center in the front-rear direction of the shield frame in the rotation frame 4. (Center of gravity), the center (center of gravity) of the shield frame in the suspending beam 5 in the front-rear direction, and the center of the shield frame in the front-rear direction (center of gravity) in the gripping portion 6 are substantially coincident with the front-rear direction of the shield frame. (See FIG. 2).

  Further, in the present embodiment, the drive motor 18 is positioned on a straight line whose center (pinion 19) passes through the center (center of gravity) of the shield frame in the pair of support frames 3 and in the front-rear direction of the shield frame in the rotary frame 4. It arrange | positions so that it may exist on the straight line which passes along the center (center of gravity) (refer FIG. 2).

  Next, the operation of the erector 1 of the shield machine with the above configuration will be described.

  First, the drive motor 13 is operated to rotate the rotating frame 4 so that the gripping part 6 faces downward. Then, the telescopic jack 16 is extended to lower the grip portion 6, and the segment is gripped by the grip portion 6.

  Next, the telescopic jack 16 is once retracted to raise the gripping part 6 and lift the segment. Then, the drive motor 13 is operated to rotate the rotary frame 4 and the segment, and the drive motor 18 is operated to support the support frame. 3 and the segment are moved back and forth to move the gripping portion 6 and the segment to a predetermined position (segment assembly position).

  Then, at the segment assembly position, the telescopic jack 16 is extended to move the gripping part 6 and the segment outward in the radial direction of the shield frame, and the segment is assembled along the inner wall of the tunnel excavated by the shield machine.

  Here, in the present embodiment, the base frame 2 extending in the front-rear direction of the shield frame is disposed in the shield frame of the shield machine, and the base frame 2 can be moved in the front-rear direction of the shield frame. A pair of annular support frames 3 are mounted, and an annular rotating frame 4 that is rotatable in the circumferential direction of the shield frame is mounted on the outer periphery of the pair of support frames 3. A suspension beam 5 is attached to the suspension beam, and a gripping portion 6 for gripping the segment is provided on the suspension beam 5, and an actuator 7 for moving the pair of support frames 3 relative to the base frame 2 in the front-rear direction of the shield frame. The segment supply device for supplying the segments to the erector 1 from behind is omitted, and the actuator 7 The support frame 3 and the rotating frame 4 is moved in the longitudinal direction of the shield frame, it is possible to directly supply the segments from the rear with the erector 1.

  Further, according to the present embodiment, the actuator 7 is mounted on the rack 17 provided on the base frame 2 along the front-rear direction of the shield frame, and the drive motor 18 attached to the support frame 3. Since the rack and pinion mechanism has a pinion 19 that meshes, the length of the rack 17 may be set substantially equal to the amount of movement of the shield frame in the front-rear direction in the support frame 3 (gripping portion 6). As compared with the case of using an extension jack whose length is about twice as long as the amount of movement of the shield frame in the support frame 3 (gripping part 6) in the longitudinal direction, It can be made compact.

  In the present embodiment, the pair of support frame 3, rotating frame 4, suspension beam 5, and gripping portion 6 are arranged along the radial direction of the shield frame, so that when the gripping portion 6 grips the segment, The rotating frame 4 (first roller 10) is only effective in the direction perpendicular to the front-rear direction of the shield frame and has little bending moment, which is advantageous in terms of load support. It is possible to achieve downsizing. On the other hand, in the conventional erector described in the background art section, since the segment is supported in a cantilever manner with respect to the rotating frame, it is necessary to assemble a large segment used in a large-diameter shield machine. It is necessary to increase the size of a rotating frame that receives a load (bending moment).

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, It is possible to take other various embodiment.

  For example, the gripping unit 6 is not limited to the above configuration (vacuum device), and may have a mechanism for gripping the gripping hardware attached to the segment.

  The suspension beam 5 may be provided with a mechanism for moving the grip 6 in the front-rear direction of the shield frame.

FIG. 1 is a plan view of an erector of a shield machine according to an embodiment of the present invention. 2 is a view taken along the line II-II in FIG. 3 is a view taken along the line III-III in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electa 2 Base frame 3 Support frame 4 Rotating frame 5 Hanging beam 6 Gripping part 7 Actuator

Claims (2)

  A base frame disposed in the shield frame of the shield machine and extending in the front-rear direction of the shield frame; and an annular support frame attached to the base frame and movable in the front-rear direction of the shield frame; An annular rotary frame attached to the outer periphery of the support frame and rotatable in the circumferential direction of the shield frame; a suspension beam attached to the outer circumference of the rotary frame and movable in the radial direction of the shield frame; A shield machine, comprising: a grip portion that is provided on a suspension beam and grips a segment; and an actuator that moves the support frame in the front-rear direction of the shield frame with respect to the base frame. Electa.   A rack-and-pinion, wherein the actuator includes a rack provided on the base frame along the front-rear direction of the shield frame, and a pinion mounted on a drive motor attached to the support frame and meshing with the rack. The erector of the shield machine according to claim 1, comprising a mechanism.

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