JP2009046883A - Shield driving machine and its cutter driving part collecting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shield driving machine and its cutter driving part collecting method for collecting a driving part of a cutter frame removed from a driving machine body after completing driving operation while reducing cost and a construction period. <P>SOLUTION: The shield driving machine comprises a partition wall 6 provided in a shield frame 2, an opening part 29 annularly opened in the partition wall 6 around a rotational center X of the cutter frame 4, a housing block 30 which is attached/detached to/from the partition wall 6 through a counter face side and on which the driving part 5 of the cutter frame 4 is mounted, a collecting intermediate ring 31 mounted on the housing block 30 and adapted to be rotationally driven by the driving part 5, a residing intermediate ring 32 overlaied on the collecting intermediate ring 31 and connected to the cutter frame 4, and screw fasteners 33 to be attached/detached to/from the both rings 31, 32 overlaid on each other through the counter face side for connecting/disconnecting the residing intermediate ring 32 to/from the collecting intermediate ring 31. The plurality of screw fasteners 33 are arranged at spaces in the peripheral directions of both rings 31, 32. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a shield excavator that removes a drive unit of a cutter frame from an excavator body after the excavation is completed, and a method for recovering the cutter drive unit.

  As a shield machine, a cutter frame disposed at the front of the machine body is rotated around an axis parallel to the direction of digging by a drive unit housed in the machine, and a bit provided on the cutter frame What cuts the face is known. Here, since the drive unit is provided with relatively expensive parts such as a motor, a gear, and a bearing, the drive unit after the shield machine has completed excavation to the end of the tunnel planned line in the soil. There is a demand to remove it from the main body of the excavator without collecting it in the soil and to reuse it.

  A technique described in Patent Document 1 is known as a technique that meets this demand. In this technique, the main body of the excavator has a double cylinder structure including an outer cylinder and an inner cylinder that is detachably locked in the inner cylinder, and a cutter frame disposed in front of the inner and outer cylinders in the axial direction is driven to rotate. A shield machine with a drive unit attached to the inside of the inner cylinder is used. With this shield machine, after excavating the soil to the end of the tunnel planned line with the inner cylinder locked to the outer cylinder, solidifying agent (cement milk etc.) is injected into the ground in front of the cutter frame, After the ground is solidified, the inner and outer cylinders are unlocked, and the outer cylinder is left, and the inner cylinder is pulled out together with the cutter frame in the axial direction, thereby recovering the drive unit attached to the inner cylinder.

JP 2001-317285 A

  By the way, in the above technique, the cutter frame is pulled out together with the inner cylinder into the outer cylinder. However, the rotation diameter at the outer peripheral end of the cutter frame is adjusted to the outer diameter of the outer cylinder. In order to prevent the outer peripheral end from being caught on the front edge of the outer cylinder, a radial expansion / contraction mechanism is provided on the cutter frame, or an operator goes out from the inside of the excavator main body to the face and cuts the cutter frame. There is a need. Providing a radial expansion and contraction mechanism on the cutter frame leads to an increase in cost, and in order for workers to cut the cutter frame, it is necessary to take sufficient measures such as increasing the amount of medicine injected into the face. It leads to extension.

  Further, in the above technique, when the cutter frame is pulled out together with the inner cylinder into the outer cylinder, the opening in front of the outer cylinder is blocked by the ground of the face solidified by the injection of the solidifying agent, and the water is stopped. In order to ensure this water stoppage, a sufficient amount of solidifying agent that ensures water stoppage must be injected into the ground surface in front of the cutter frame. It will be up. Moreover, when the amount of chemical injection increases, the time for waiting for the injected solidifying agent to solidify becomes longer, and the construction period is also extended.

  The purpose of the present invention, which was created in view of the above circumstances, is to provide a shield machine and a cutter drive part collection method for removing the drive part of the cutter frame from the machine body after the completion of excavation and recovering the cost. It is an object of the present invention to provide a shield machine and a cutter driving unit recovery method for shortening the length of the shield machine.

  In order to achieve the above object, a first invention has a cutter frame that is rotated around an axis parallel to a digging direction at a front portion of a digging machine main body, and the driving unit of the cutter frame is attached to the digging machine after digging is completed. A shield machine that is removed from the main body and collected, and a partition wall that is provided in a cylindrical shield frame that forms an outer shell of the main body of the above-mentioned excavator body, and that is provided by partitioning the inside of the shield frame in the front and rear directions. An opening that is annularly opened around the rotation center of the cutter frame, a housing block that is attached to and detached from the opposite face to the partition wall, and on which the drive unit of the cutter frame is mounted, and that rotates to the housing block A recovery intermediate ring that is mounted in a possible manner and is rotationally driven by the drive unit, and is formed in an annular shape in conformity with the opening; An annular ring formed so as to be exposed from the section, and the remaining intermediate ring connected to the cutter frame, and the remaining intermediate ring and the recovery intermediate ring are connected to and separated from each other. And a plurality of screw fasteners arranged at intervals in the circumferential direction of the remaining intermediate ring and the recovery intermediate ring.

  The recovery intermediate ring has a plurality of first through holes formed in the circumferential direction at intervals in the circumferential direction, and the screw fastener is disposed in the circumferential direction on the anti-face surface of the remaining intermediate ring. A screw rod that is screwed into the first through hole and a nut that is screwed into the screw rod that passes through the first through hole.

  A swivel ring that rotatably supports the recovery intermediate ring is attached to the housing block, and the swivel ring has an annular stationary housing that is mounted on the housing block, and an annular ring that is mounted on the recovery intermediate ring. A rotating housing, and a bearing interposed between the stationary housing and the rotating housing. The rotating housing is formed along a plurality of digging directions at intervals in the circumferential direction. The threaded rod penetrates the second through hole after passing through the first through hole, and the nut is screwed into the threaded rod that penetrates the second through hole. The nut is removed from the screw rod with the swivel ring attached to the housing block between the stationary housing and the housing block. Space may be provided a spacer for forming a.

  In order to transmit the propulsion reaction force of the face applied to the housing block from the cutter frame through the remaining intermediate ring and the recovery intermediate ring to the partition wall, the housing block and the partition wall may be connected by a tension member.

  The second invention is a method for removing the drive unit of the cutter frame from the excavator main body after the excavation of the shield excavator and recovering, wherein the shield excavator has a cylindrical shape that forms an outer shell of the excavator main body. A partition provided in the shield frame by partitioning the shield frame in the front and rear direction, an opening opened in an annular shape around the rotation center of the cutter frame, and an anti-face to the partition A housing block that is detachable from the side and is mounted with the drive unit of the cutter frame, and is rotatably mounted on the housing block and rotated by the drive unit, and is formed in an annular shape in accordance with the opening. A recovery intermediate ring, and a remaining intermediate that is overlapped with the recovery intermediate ring and formed in an annular shape so as to be exposed from the opening, and connected to the cutter frame And a screw fastener that is attached to and detached from the opposite face to both the overlapped rings to connect and disconnect the remaining intermediate ring and the recovery intermediate ring, and the shield machine is completed in the soil. After digging to the position, a solidifying agent is injected into the cutter chamber between the partition wall and the cutter frame to solidify the earth and sand in the cutter chamber, the screw fastener is loosened, and the recovery from the remaining intermediate ring The intermediate ring is cut off, the remaining intermediate ring and the cutter frame are left in the soil, and the recovery intermediate ring and the housing block are removed to the opposite face side and recovered.

  ADVANTAGE OF THE INVENTION According to this invention, cost reduction and shortening of a construction period can be aimed at in the shield excavator which removes and collects the drive part of a cutter frame from an excavator main body after the completion of excavation, and its cutter drive part collection | recovery method.

  A preferred embodiment of the present invention will be described with reference to the accompanying drawings.

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

  This shield machine 1 includes a machine body 3 having a cylindrical shield frame 2 as an outer shell, a cutter frame 4 rotated around an axis parallel to the machine direction at the front of the machine 3, and a machine And a drive unit 5 for rotating the cutter frame 4 accommodated in the main body 3, and the drive unit 5 can be removed from the excavator main body 3 and collected after the excavation is completed.

  The excavator main body 3 includes a cylindrical shield frame 2, a partition wall 6 provided in the shield frame 2 by partitioning the interior thereof in the front and rear direction, and a cutter frame 4 attached to the partition wall 6 for rotationally driving. It has a drive unit 5 and a cutter frame 4 disposed in front of the partition wall 6 and driven to rotate by the drive unit 5. The cutter frame 4 has an intermediate beam 7 that extends rearward in the digging direction from the back surface (surface on the side opposite to the face) of the cutter frame 4 and is connected to the drive unit 5. A plurality of intermediate beams 7 are provided on the back surface of the cutter frame 4 at intervals in the circumferential direction around the rotation center of the cutter frame 4.

  A center shaft 8 extending rearward in the excavation direction is provided at the center of the cutter frame 4. The center shaft 8 passes through the partition wall 6 through a seal 9, and the center shaft that passes through the partition wall 6. A rotary joint 10 is provided at the rear end of 8. Hydraulic pressure is supplied to the cutter frame 4 via the rotary joint 10, and hydraulic pressure is supplied to a hydraulic device (not shown) (such as a copy cutter jack) mounted in the cutter frame 4.

  In the lower part of the partition wall 6, the excavated earth and sand cut into the cutter chamber 12 between the cutter frame 4 and the partition wall 6 by the bit 11 attached to the cutter frame 4 is put into the mine (behind the partition wall 6). A screw conveyor 13 is attached as a soil removal device for taking in. In addition, since this embodiment is an earth pressure type shield, the screw conveyor 13 is attached. However, in the case of a muddy water type shield, a sending and discharging mud pipe is attached to the partition wall 6 instead of the screw conveyor 13.

  Inside the shield frame 2 is provided an erector 15 that assembles the segments 14 into a ring shape along the inner peripheral surface of the shield frame 2. The erector 15 includes a swiveling ring 16 supported so as to be rotatable about the axis of the shield frame 2, a hanging beam 17 attached to the swiveling ring 16 and movable in the tunnel radial direction, and attached to the hanging beam 17 in the tunnel axial direction. And a gripping portion 19 that is attached to the slide block 18 and grips the segment 14.

  The segment 14 (existing segment) assembled in a ring shape by the erector 15 is held in a perfect circle state by applying a tensile force in the vertical direction by the shape retaining device 20 (segment perfect circle retaining device). The shape holding device 20 is movable in the tunnel axis direction to a rear work table 22 that extends in the tunnel axis direction at the center of the shield frame 2 and is supported by the shield frame 2 via a metal fitting 21 at the front part. And has an inverted U-shaped upper shoe 23 that pushes up the existing segment 14 above, and a U-shaped lower shoe 24 that contacts the existing segment 14 below.

  A plurality of shield jacks 25 are attached to the inner peripheral surface of the shield frame 2 at intervals in the circumferential direction to take the reaction force of the existing segments 14 and advance the main body 3. The shield jack 25 is extended with the shoe 26 provided at the tip of the telescopic rod in contact with the existing segment 14 to advance the shield frame 2, that is, the excavator main body 3.

  After the excavation to the end of the tunnel planned line is completed in the soil using the shield excavator 1 described above, the inner peripheral surface of the shield frame 2 and the existing segment 14 are connected by the fixing bracket 27, and the shield frame 2 is prevented from moving backward in the direction of excavation.

  After the mounting of the fixing bracket 27, at the same time as the mounting, or prior to mounting, the cutter frame 4 and the partition wall 6 are inserted from the rear of the partition wall 6 through the injection pipes 28 that are passed through the partition wall 6. A solidifying agent (such as cement milk) is injected into the cutter chamber 12 to solidify the earth and sand in the cutter chamber 12.

  Using the solidification time of the earth and sand in the cutter chamber 12, the shape holding device 20 is removed and conveyed backward, the rear work table 22 is divided and removed and conveyed backward, and the screw conveyor 13 is removed and conveyed backward. Then, the erector 15 is removed and conveyed backward, and the shield jack 25 is removed and conveyed backward.

  As a result, the state shown in FIG. 2 is obtained. In FIG. 2, a portion represented by dots in the cutter chamber 12 indicates the earth and sand solidified by the solidifying agent injected from the injection pipe 28. A plurality of injection tubes 28 are arranged at intervals in the circumferential direction of the partition wall 6.

  Next, regarding the structure and method for removing the drive unit 5 of the cutter frame 4 from the excavator main body 3 and collecting it from the state of FIG. 2, the IV-IV line part of FIG. 3 and FIG. 4 and FIG. 3 which are sectional views, and FIG. 5 to FIG. 7 which are exploded views of FIG.

  As shown in FIGS. 2, 3, and 6, this shield machine 1 includes a partition wall 6 provided in the shield frame 2, the interior of which is divided in the front and rear in the direction of drilling, and the cutter frame 4 on the partition wall 6. An opening 29 that is annularly opened around the rotation center X, a housing block 30 that is attached to and detached from the partition wall 6 from the opposite face side, and that is mounted with the drive unit 5 of the cutter frame 4, and the housing block 30 is rotatable. A recovery intermediate ring 31 that is attached to the recovery intermediate ring 31 and is rotated by the drive unit 5; a remaining intermediate ring 32 that is overlapped with the intermediate recovery ring 31 and connected to the intermediate beam 7 of the cutter frame 4; In order to connect and disconnect the ring 31, a screw fastener 33 that is attached to and detached from the opposite face side is provided on the stacked rings 31 and 32.

  The recovery intermediate ring 31 is formed in an annular shape corresponding to the opening 29 of the partition wall 6, is formed of a ring body having a U-shaped cross section having a recess 34 in the digging direction (front), and includes a plurality of first through holes 35. ing. The first through holes 35 are formed along a plurality of digging directions at intervals in the circumferential direction of the recovery intermediate ring 31. A screw rod 33 a of a screw fastener 33 planted in the remaining intermediate ring 32 is inserted into the first through hole 31. A seal 36 is interposed between the recovery intermediate ring 31 and the housing block 30 to prevent entry of earth and sand and moisture in the cutter chamber 12.

  The remaining intermediate ring 32 is formed in an annular shape so as to be exposed in the cutter chamber 12 from the opening 29 of the partition wall 6, and an engaging / disengaging portion 32 a made of a ring body that engages and disengages with the recess 34 of the recovery intermediate ring 31 And a front plate 32b made of an annular plate attached to the face side (front) of the engagement / disengagement portion 32a. The front plate 32 b is exposed from the opening 29 of the partition wall 6 into the front cutter chamber 12. An intermediate beam 7 provided on the back surface of the cutter frame 4 is attached to the front plate 32b. A plurality of screw rods 33a (hereinafter referred to as stud bolts) are implanted in the engaging / disengaging portion 32a of the remaining intermediate ring 32.

  A plurality of stud bolts 33a are screwed into a screw hole formed in the engagement / disengagement portion 32a in parallel to the digging direction at intervals in the circumferential direction. The stud bolt 33 a passes through a first through hole 35 formed in the recovery intermediate ring 31, passes through a through hole formed in an intermediate member 37 described later, and is formed in a rotation side housing 39 of the swivel ring 38. 2 through the through hole 40. A nut 33b is screwed into the tip of the stud bolt 33a penetrating the second through hole 40, and the nut 33b is seated on the end face of the rotation side housing 39, so that the remaining intermediate ring 32 and the recovery intermediate ring 31 are connected. Is done. The stud bolt 33a and the nut 33b constitute a screw fastener 33 that connects and disconnects the remaining intermediate ring 32 and the recovery intermediate ring 31, and the nut 33b is on the opposite face side with respect to the stacked rings 31 and 32. It becomes a part to be detached from.

  The housing block 30 is formed in a substantially donut shape centered on the rotation center X of the cutter frame 4, and a swivel ring that supports the recovery intermediate ring 31 rotatably around the rotation center X in the housing block 30. 38 is attached. The swivel ring 38 includes an annular stationary housing 42 attached to the housing block 30 by a bolt nut 41, an annular rotating housing 39 attached to the recovery intermediate ring 31 by a set bolt 43, and a stationary housing 42. And a bearing 44 (a rear main thrust bearing, a front sub-thrust bearing, and an intermediate radial bearing) interposed between the rotary housing 39 and the rotary housing 39.

  A plurality of bolt nuts 41 for attaching the stationary side housing 42 to the housing block 30 are arranged at intervals in the circumferential direction of the stationary side housing 42, and stud bolts 41 a implanted in the stationary side housing 42, and stud bolts The nut 41b is screwed into the 41a and is seated on the end face of the housing block 30. The stud bolt 41 a passes through a through hole formed in the spacer 45 interposed between the stationary housing 42 and the housing block 30 and passes through the through hole formed in the housing block 30. A nut 41 b is screwed into the tip of the stud bolt 41 a that has passed through the through hole of the housing block 30, and the nut 41 b is seated on the end surface of the housing block 30, so that the stationary side housing 42 and the housing block 30 of the swivel ring 38 are placed. Are connected.

  The spacer 45 is provided to form a space 46 for removing the nut 33b of the screw fastener 33 from the stud bolt 33a in a state where the swivel ring 38 is attached to the housing block 30. That is, when the spacer 45 is not provided, the space between the stationary housing 42 and the housing block 30 is narrowed, so the space 46 is extremely small and the nut 33b cannot be removed. To remove the nut 33b, the nut 41b or the like that connects the swivel ring 38 and the housing block 30 is loosened, so that the housing block 30 must be separated and removed from the swivel ring 38 to expose the nut 33b. The assembly product 61, in which the 30 and the swivel ring 38 are integrated, cannot be recovered.

  The set bolt 43 for attaching the recovery intermediate ring 31 to the rotation side housing 39 passes through the recovery intermediate ring 31 from the face side (front surface) of the recovery intermediate ring 31 and reaches the rotation side housing 39 as indicated by a broken line in FIG. Screwed to a depth, the recovery intermediate ring 31 and the rotation side housing 39 are connected. That is, the recovery intermediate ring 31 is formed with a through hole in which a large diameter hole in which the bolt head of the set bolt 43 is rotatably accommodated and a small diameter hole through which the bolt shaft passes is formed. A through hole through which the bolt shaft portion of the set bolt 43 passes is formed in the ring-shaped intermediate member 37 interposed between the rotation side housing 39 and the bolt shaft of the set bolt 43 is formed in the rotation side housing 39. A screw hole into which the portion is screwed is formed. As shown in FIG. 4, a plurality of set bolts 43 are arranged at equal intervals in the circumferential direction of the recovery intermediate ring 31.

  As shown in FIG. 6, the rotation-side housing 39 is formed with a second through hole 40 that is formed in parallel to the excavation direction. A plurality of second through holes 40 are formed in the rotation side housing 39 at intervals in the circumferential direction, and the circumferential installation positions thereof are circumferential installation positions of the first through holes 35 formed in the recovery intermediate ring 31. It is adapted to. Therefore, the stud bolt 33 a implanted in the remaining intermediate ring 32 is penetrated by the first through hole 35 of the recovery intermediate ring 31 and then the through hole of the intermediate member 37, and the second hole of the rotation side housing 39. The through hole 40 is penetrated. The intermediate member 37 may be omitted.

  As shown in FIG. 4, a plurality of stud bolts 33 a planted in the remaining intermediate ring 32 are arranged at equal intervals in the circumferential direction of the remaining intermediate ring 32, and are arranged out of phase with the set bolt 43. . In the present embodiment, the same number of stud bolts 33a and set bolts 43 are alternately arranged in the circumferential direction, but the number is not limited to the same number. The stud bolts 33a may be any number and bolt diameter that can appropriately transmit the rotational torque of the rotation side housing 39 driven by the motor 47 described later to the cutter frame 4, and the set bolts 43, as shown in FIG. Any number and bolt diameter may be used so long as the recovery intermediate ring 31 can be appropriately supported by the rotation-side housing 39 when the recovery intermediate ring 31 is separated from the remaining intermediate ring 32.

  A motor 47 for rotationally driving the rotation side housing 39 of the swivel ring 38 is mounted on the housing block 30. A pinion 48 is attached to the rotation shaft of the motor 47, and the pinion 48 is meshed with an external gear 49 formed on the outer peripheral surface of the rotation side housing 39 of the turning ring 38. According to this configuration, when the pinion 48 rotates by driving the motor 47, the rotation side housing 39 formed with the external gear 49 meshing with the pinion 48 rotates, and the recovery intermediate ring connected to the rotation side housing 39 is rotated. 31 rotates, the remaining intermediate ring 32 connected to the recovery intermediate ring 31 by the stud bolt 33a rotates, the intermediate beam 7 attached to the remaining intermediate ring 32 rotates, and the cutter head 4 attached to the intermediate beam 7 is rotated. Is rotated.

  A center block 50 is attached to the housing block 30 at a radially inner portion. The center block 50 has a disk 50 a that is stacked on the back surface of the partition wall 6, and this disk 50 a is attached to and detached from the partition wall 6 from the opposite face side by a bolt and nut 51. The bolt nut 51 includes a bolt 51a fixed to the partition wall 6, and a nut 51b screwed into the shaft portion of the bolt 51a penetrating the disk 50a and seated on the disk 50a. A hole is formed in the central portion of the disc 50 a, and a cylinder 52 is provided in the hole, and the center shaft 8 is rotatably inserted into the cylinder 52 through a seal 9.

  The housing block 30 is provided with a load transmission flange 53 at a radially outer portion thereof, and a tension bolt 54 is provided as a tension member between the load transmission flange 53 and the partition wall 6. The tension bolt 54 has a front end screwed into the screw hole 55 on the back surface of the partition wall 6 and a rear end threaded through the hole 56 formed in the load transmission flange 53, and is screwed into the rear end of the stud bolt 54a. The nut 54b is rarely seated on the load transmission flange 53. The tension bolt 54 transmits the driving reaction force of the face applied to the housing block 30 from the cutter frame 4 through the remaining intermediate ring 32 and the recovery intermediate ring 31 to the partition wall 6.

  A plurality of tension bolts 54 are provided at intervals in the circumferential direction of the load transmission flange 53. The number of tension bolts 54 and the diameter of the bolts are appropriately set so that the driving reaction force of the face generated when the cutter frame 4 is pressed against the face when the shield jack 25 is extended (the bolt 54 does not break due to the pulling force). ) It is set so that it can be transmitted to the partition wall 6. Here, since the load transmission flange 53 is provided at a radially outer portion of the housing block 30, the tension bolt is compared with the load transmission flange 53 provided at a radially inner portion of the housing block 30. The installation area of 54 becomes large, and the installation number of the tension bolts 54 can be earned.

  Next, the procedure for removing the drive unit 5 (motor 49, swivel ring 38, recovery intermediate ring 31, seal 36, etc.) of the cutter frame 4 from the excavator main body 3 after the state shown in FIG. 2 is recovered will be described.

  As shown in FIGS. 3 and 5, the bolt 57 for fixing the motor 47 to the housing block 30 is removed, and the motor 47 is removed from the housing block 30 rearward. Since the opening portion 58 is opened in the housing block 30 by removing the motor 47, a screw that integrates the rotation side housing 39, the recovery intermediate ring 31, and the remaining intermediate ring 32 of the swivel ring 38 through the opening portion 58. The nut 33b of the fastener 33 is removed.

  Here, a space 46 for removing the nut 33 b is formed behind the nut 33 b by a spacer 45 interposed between the stationary housing 42 of the swivel ring 38 and the inner surface of the housing block 30. Therefore, a socket wrench is inserted into the space 46 from the gap between the rear end of the external gear 49 of the rotation side housing 39 and the inner surface of the housing block 30 through the opening 58, and the socket wrench is inserted into the space 46. The nut 33b can be appropriately removed from the stud bolt 33a by covering the nut 33b using

  The nut 54 b of the tension bolt 54 that transmits the driving reaction force of the face applied to the housing block 30 to the partition wall 6 is removed. Since this nut 54b is exposed inside the excavator main body 3 (inside the shield frame 2 and behind the partition wall 6), it can be easily removed. The nut 51b that connects the center block 50 to the partition wall 6 is removed. Since this nut 51b is also exposed inside the excavator main body 3, it can be easily removed. The bolt 59 for fastening the center shaft 8 and the rotary joint 10 is removed. Since the head of the bolt 59 is also exposed inside the excavator main body 3, it can be easily removed.

  The fall prevention metal fitting 60 welded to the load transmission flange 53 of the housing block 30 and welded to the partition wall 6 is cut (melting or the like), and the housing block 30 is separated from the partition wall 6. A plurality of fall prevention metal fittings 60 are arranged at intervals in the circumferential direction of the load transmission flange 53, and prevent the cutter frame 4 from tilting (falling down) due to an offset load applied to the cutter frame 4 from the face. .

  Through the above operation, the connection between the housing block 30 and the partition wall 6 is released, the connection between the center block 50 and the partition wall 6 is released, and the connection between the rotary joint 10 and the center shaft 8 is released.

  As shown in FIG. 6, the housing block 30 is pulled out in the anti-digging direction. As a result, the housing block 30, the turning ring 38 attached to the housing block 30 with the bolt nut 41, the recovery intermediate ring 31 attached to the turning ring 38 with the set bolt 43, and the center block connected to the housing block 30 50 and the rotary joint 10 supported by the center block 50 via the seal 9 are integrated by only the work in the main body 3 behind the partition wall 6 without an operator coming out in front of the partition wall 6. As an assembly product 61, it is collected. At this time, since the earth and sand and water in the cutter chamber 12 are solidified by the previously injected solidifying agent, the earth and sand and water in the cutter room 12 are mixed with the opening 29 of the partition wall 6 and the front plate 32b of the remaining intermediate ring 32. It does not spout into the excavator main body 3 from the gap between them.

  Since the recovery intermediate ring 31 is attached to the rotation-side housing 39 of the swivel ring 38 by the set bolt 43, the recovery intermediate ring 31 does not fall off the assembly product 61, that is, the swivel ring 38 attached to the housing block 30. Therefore, the seal 36 between the outer surface of the recovery intermediate ring 31 and the inner surface of the housing block 30 does not fall off. As a result, the housing block 30, the swivel ring 38, the recovery intermediate ring 31, the seal 36, the center block 50, the seal 9 and the rotary joint 10 can be detached from the excavator main body 3 as an integrated assembly 61. The product 61 can be reused as it is for another shield machine having a similar structure.

  Thereafter, as shown in FIG. 7, the stud bolt 54a screwed into the screw hole 55 of the partition wall 6 is loosened and removed, and the stud bolt 33a screwed into the screw hole of the remaining intermediate ring 32 is loosened and removed and recovered. Reuse.

  According to this embodiment, in the shield machine 1 and its cutter drive part collection method for removing the drive unit 5 of the cutter frame 4 from the machine main body 3 and collecting it after the completion of excavation, cost reduction and shortening of the construction period are achieved. be able to.

  That is, in the technique of Patent Document 1, the cutter frame is pulled out into the outer cylinder together with the inner cylinder, but the rotation diameter at the outer peripheral end of the cutter frame is adjusted to the outer diameter of the outer cylinder. In order to prevent the outer peripheral edge of the cutter frame from being caught by the front edge of the outer cylinder, a radial expansion / contraction mechanism is provided on the cutter frame, or an operator comes out from the inside of the main body of the excavator to the cutting face side to cut the cutter. The frame needs to be cut. Providing a radial expansion and contraction mechanism on the cutter frame leads to an increase in cost, and in order for workers to cut the cutter frame, it is necessary to take sufficient measures such as increasing the amount of medicine injected into the face. It leads to extension.

  On the other hand, in this embodiment, since the cutter frame 4 is left in the soil, the above-described problem does not occur, and the cost can be reduced and the construction period can be shortened as compared with the technique of Patent Document 1. . In the present embodiment, the cutter frame 4 is left in the soil without being recovered, but the cutter frame 4 is a relatively simple structure, and can be recovered by the drive unit 5 (the motor 47, the gear constituting the swivel ring 38, Compared to bearings, etc., they are inexpensive parts. Therefore, there are disadvantages due to leaving the cutter frame 4 in the soil (the cutter frame 4 cannot be reused) and benefits (the cutter frame 4 does not need to be provided with a radial expansion / contraction mechanism, thereby reducing the cost of the entire excavator. Compared to the plan, the amount of drug injection to the face can be reduced, so the construction period can be shortened), and the profit is better than the disadvantage.

  In the technique of Patent Document 1, when the cutter frame is pulled out together with the inner cylinder into the outer cylinder, the opening in front of the outer cylinder is blocked by the ground of the face solidified by the chemical injection, and the water is stopped. In order to ensure this water stoppage, a sufficient amount of solidifying agent that ensures water stoppage must be injected into the ground surface in front of the cutter frame. It will be up. Moreover, when the amount of chemical injection increases, the time for waiting for the injected solidifying agent to solidify becomes longer, and the construction period is also extended.

  On the other hand, in this embodiment, since the solidifying agent is injected into the cutter chamber 12 between the cutter frame 4 and the partition wall 6 and solidifies the earth and sand in the cutter chamber 12, water is stopped. Compared with technology, the amount of solidifying agent injected is greatly reduced, resulting in lower costs. Moreover, since the earth and sand in the cutter chamber 12 should just solidify, the time which waits for solidification can be shortened, and a construction period is shortened.

  By the way, the rotational torque of the rotation side housing 39 of the turning ring 38 rotated by the motor 47 is transmitted to the cutter frame 4 via the stud bolt 33 a of the screw fastener 33.

  Here, as described above, the stud bolts 33a can be installed by surrounding the rings 31 and 32 using the annular shape of the remaining intermediate ring 32 and the recovery intermediate ring 31 as described above. . Therefore, the rotational torque of the rotation-side housing 39 driven by the motor 47 can be appropriately transmitted to the cutter frame 4 via a sufficient number of stud bolts 33a. Therefore, the stud bolt 33a is not broken (shear broken) by the rotational torque.

  Further, the thrust generated when the shield jack 25 is extended is transmitted from the partition wall 6 provided in the shield frame 2 to the housing block 30 via the tension bolt 54, and from the housing block 30 to the swivel ring 38, the recovery intermediate ring 31, and the remaining portion. It is transmitted to the cutter frame 4 via the intermediate ring 32 and the intermediate beam 7. On the contrary, the driving reaction force of the face generated by pressing the cutter frame 4 against the face is transmitted to the housing block 30 via the cutter frame 4, the intermediate beam 7, the remaining intermediate ring 32, the recovery intermediate ring 31, and the swivel ring 38. Then, it is transmitted from the housing block 30 to the partition wall 6 via the tension bolt 54, and transmitted from the partition wall 6 to the existing segment 14 via the shield frame 2 and the shield jack 25.

  Here, as described above, the tension bolt 54 can be installed by surrounding the flange 53 using the annular shape of the load transmission flange 53 provided in the housing block 30 as described above. . Therefore, the thrust of the shield jack 25 can be appropriately transmitted to the cutter frame 4 via the sufficient number of tension bolts 54. Further, the propulsion reaction force received by the cutter frame 4 from the face can be appropriately transmitted to the shield jack 25 via a sufficient number of tension bolts 54. Therefore, the tension bolt 54 is not broken (tensile fracture) by the thrust (propulsion reaction force).

It is a sectional side view of the shield machine based on one Embodiment of this invention. It is the sectional side view which removed some components from the shield machine of FIG. FIG. 3 is a partially enlarged view of FIG. 2. FIG. 4 is a partial sectional view taken along line IV-IV in FIG. 3. It is sectional drawing which shows a mode that the motor was removed from FIG. It is sectional drawing which shows a mode that the housing block etc. were removed from FIG. It is sectional drawing which shows a mode that the stud bolt was removed from FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shield machine 2 Shield frame 3 Engraver body 4 Cutter frame 5 Drive part 6 Bulkhead 12 Cutter chamber 29 Opening part 30 Housing block 31 Recovery intermediate ring 32 Remaining intermediate ring 33 Screw fastener 33a Screw rod 33b Nut 35 First through hole 38 Rotating ring 39 Rotating side housing 40 Second through hole 42 Stationary side housing 44 Bearing 45 Spacer 46 Space 54 Tension member (tension bolt)
X center of rotation

Claims (5)

A shield machine that has a cutter frame that is rotated around an axis parallel to the direction of digging at the front of the machine body, and that removes the drive unit of the cutter frame from the machine body after the excavation and collects it,
In the cylindrical shield frame forming the outer shell of the excavator main body, a partition wall provided by partitioning the shield frame in the front and rear in the excavation direction,
An opening that is annularly opened around the rotation center of the cutter frame in the partition;
A housing block that is attached to and detached from the opposite face to the partition wall, and on which the drive unit of the cutter frame is mounted,
A recovery intermediate ring that is rotatably mounted on the housing block and rotated by the drive unit, and is formed in an annular shape in accordance with the opening;
A remaining intermediate ring that is overlapped with the recovery intermediate ring and formed in an annular shape so as to be exposed from the opening, and connected to the cutter frame;
In order to connect and disconnect the remaining intermediate ring and the recovery intermediate ring, a screw fastener that is attached to and detached from the opposite face side to both stacked rings,
2. A shield machine according to claim 1, wherein a plurality of screw fasteners are arranged at intervals in the circumferential direction of the remaining intermediate ring and the recovery intermediate ring. The recovery intermediate ring has a plurality of first through holes formed along the digging direction at intervals in the circumferential direction;
A plurality of screw fasteners are screwed into the opposite face surface of the remaining intermediate ring at intervals in the circumferential direction and pass through the first through hole, and the screw rod that passes through the first through hole, respectively. The shield machine according to claim 1, comprising a screwed nut. A swivel ring that rotatably supports the recovery intermediate ring is attached to the housing block,
The swivel ring is interposed between an annular stationary housing mounted on the housing block, an annular rotating housing mounted on the recovery intermediate ring, and between the stationary housing and the rotating housing. Bearings installed,
The rotation-side housing has a second through hole formed along a plurality of digging directions at intervals in the circumferential direction;
The screw rod passes through the second through hole after passing through the first through hole;
The nut is screwed into the threaded rod penetrating the second through hole;
The shield machine according to claim 2, wherein a spacer is provided between the stationary housing and the housing block to form a space for removing the nut from the screw rod in a state where the swivel ring is attached to the housing block.   The housing block and the partition wall are connected by a tension member to transmit the propulsion reaction force of the face applied to the housing block from the cutter frame through the remaining intermediate ring and the recovery intermediate ring to the partition wall. The shield machine according to any one of 3 above. A method of removing the drive unit of the cutter frame from the main body of the excavator and collecting it after completion of the excavation of the shield machine,
The shield machine is
In the cylindrical shield frame forming the outer shell of the excavator main body, a partition wall provided by partitioning the shield frame in the front and rear in the excavation direction,
An opening that is annularly opened around the rotation center of the cutter frame in the partition;
A housing block that is attached to and detached from the opposite face to the partition wall, and on which the drive unit of the cutter frame is mounted,
A recovery intermediate ring that is rotatably mounted on the housing block and rotated by the drive unit, and is formed in an annular shape in accordance with the opening;
A remaining intermediate ring that is overlapped with the recovery intermediate ring and formed in an annular shape so as to be exposed from the opening, and connected to the cutter frame;
In order to connect and disconnect the remaining intermediate ring and the recovery intermediate ring, a screw fastener that is attached to and detached from the opposite face side to both stacked rings,
After digging such a shield machine to the end of excavation in the soil,
Injecting a solidifying agent into the cutter chamber between the partition wall and the cutter frame solidifies the earth and sand in the cutter chamber,
Loosen the screw fastener and disconnect the recovery intermediate ring from the remaining intermediate ring,
A method for recovering a cutter drive unit of a shield machine, wherein the remaining intermediate ring and the cutter frame are left in the soil, and the recovery intermediate ring and the housing block are removed and recovered on the side opposite to the face.

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