JP6228036B2 - Tunnel excavator - Google Patents

Description

  The present invention relates to a tunnel excavator.

  In the tunnel excavator, a disc-shaped cutter head is supported by a cutter driving device at a front portion of a cylindrical excavator main body (skin plate) so as to be driven to rotate, and the excavator main body has a rear portion of the excavator main body. A plurality of propulsion jacks for advancing the main body and an erector device for assembling the segments to the inner wall surface of the existing tunnel (the surrounding wall of the ground) are mounted. In addition, a spreader is provided at the tip of the propulsion jack, the propulsion jack is extended, and the spreader is pressed against an existing segment, thereby obtaining a reaction force from the segment to advance the excavator body (for example, patent Reference 1).

  The segments to be assembled to the inner wall surface of the tunnel include a concrete segment made of concrete and a steel segment made of metal such as iron, and these segments are properly used depending on the application. For example, a concrete segment is used in a long straight portion in a tunnel, and a steel segment is used in a curved portion or a planned branch portion.

  In general, the material of the pressing surface of the spreader pressed against the segment is changed depending on whether the segment to be used is a concrete segment or a steel segment. Specifically, when using steel segments, the steel pressing surface of the spreader is pressed. When using concrete segments, the steel pressing surface of the spreader is made of urethane rubber, etc. A buffer member made of an elastic member is attached, and the buffer member is pressed against the concrete segment.

  This may damage the concrete segment if the steel pressing surface is pressed against the concrete segment, and may damage the buffer member if the buffer member is pressed against the steel segment. Because.

JP 2006-241785 A

  Therefore, when the concrete segment and the steel segment are selectively used in one construction section, it is necessary to attach and detach the buffer member to the steel pressing surface of the spreader. However, since the attaching / detaching work of the buffer member is performed manually by the worker, the load on the worker is increased and the construction period is prolonged.

  The present invention has been made in view of the above problems, and an object of the present invention is to facilitate the attaching / detaching operation of the buffer member to the pressing surface of the spreader in the tunnel excavator.

  A tunnel excavator according to a first invention for solving the above-mentioned problems is a tunnel excavation provided with a cylindrical skin plate, propulsion means for advancing the skin plate, and an erector device for assembling a segment to the inner peripheral surface of the tunnel. A flat plate-shaped cushioning member attached to the abutting surface of the propulsion means with the segment and having an insertion hole; a rod-shaped insertion member that is inserted through the insertion hole and supports the buffer member; and the insertion A holding member comprising a holding portion for holding a member and a connecting portion connectable to the erector device is provided.

  A tunnel excavator according to a second invention that solves the above-described problem is the tunnel excavator according to the first invention, wherein the holding portion holds the insertion member in the axial direction of the skin plate, and the connection The portion extends from the end portion of the holding portion so as to be substantially parallel to the insertion member.

  The tunnel excavator according to a third invention for solving the above-mentioned problems is the tunnel excavator according to the first or second invention, wherein the buffer member provided at one end of the insertion member and inserted through the insertion member is provided. It is characterized by having a catching means having a projecting part or a groove part to be caught.

  A tunnel excavator according to a fourth aspect of the present invention for solving the above-described problems is the tunnel excavator according to any one of the first to third aspects, wherein the erector device matches the segment when the segment is held. A support member that can come into contact is provided, and the holding member has a contact portion that can come into contact with the support member.

  A tunnel excavation method according to a fifth aspect of the present invention for solving the above-described problem is a tunnel excavation provided with a cylindrical skin plate, propulsion means for advancing the skin plate, and an erector apparatus for assembling a segment to the inner peripheral surface of the tunnel. In a tunnel excavation method for excavating natural ground and assembling the segments to form a tunnel by a machine, an insertion hole is formed in a cushioning member that can be attached to and detached from the abutment surface of the propulsion means, and the insertion hole A storage means having a rod-like insertion member that can be inserted into the storage device is connected to the erector apparatus, and a plurality of the buffer members are stored in the storage means in a state where the insertion member is inserted into the insertion hole, and the erection apparatus is The buffer member is moved by operating the buffer member.

  A tunnel excavation method according to a sixth invention for solving the above problem is the tunnel excavation method according to the fifth invention, wherein the insertion member is positioned in the vicinity of the propulsion means by operating the erector device. The buffer member is attached to and detached from the abutting surface.

  A tunnel excavation method according to a seventh invention for solving the above-mentioned problems is the tunnel excavation method according to the fifth or sixth invention, wherein a pressure is applied to the plurality of buffer members from two different directions so as to center the insertion hole. After the shaft is aligned, the insertion member is inserted into and removed from the insertion hole.

  According to the tunnel excavator according to the first invention, in the tunnel excavator comprising a cylindrical skin plate, propulsion means for advancing the skin plate, and an erector device for assembling a segment to the inner peripheral surface of the tunnel, A flat plate-shaped buffer member that is attached to the abutting surface of the propulsion unit with the segment and has an insertion hole, a rod-shaped insertion member that is inserted through the insertion hole and supports the buffer member, and holds the insertion member Since the holding member comprising the holding portion and the connecting portion connectable to the erector device is provided, the insertion hole of the buffer member is inserted into the rod-like insertion member, so there is no possibility that the buffer member falls. The safety of the worker can be ensured and a plurality of buffer members can be easily accommodated. Moreover, since a connection part can be connected with an elector apparatus, many buffer members can be accommodated easily using the operation | movement of an elector apparatus.

  According to the tunnel excavator according to the second invention, in the tunnel excavator according to the first invention, the holding portion is configured to hold the insertion member in the axial direction of the skin plate, the connecting portion, By extending substantially parallel to the insertion member from the end of the holding portion, the insertion member faces the axial direction of the skin plate, so that the buffer member can be easily accommodated. Further, since the connecting portion is provided substantially parallel to the insertion member, that is, along the axial direction of the skin plate, the buffer member can be easily stored and can be used as a guide when the buffer member is stored.

  According to the tunnel excavator according to the third invention, in the tunnel excavator according to the first or second invention, the protruding portion provided at one end of the insertion member and hooked by the buffer member inserted through the insertion member Alternatively, since the hooking means having the groove portion is provided, there is no possibility that the stored buffer member comes out of the insertion member, so that the buffer member can be moved efficiently and the safety of workers and the like can be ensured. .

  According to the tunnel excavator according to the fourth invention, in the tunnel excavator according to any one of the first to third inventions, the erector device is capable of contacting the segment when holding the segment. Since the holding member includes a contact portion that can come into contact with the support member, the posture of the holding member and the insertion member with respect to the elector device can be limited or adjusted, so that the buffer member can be easily Can be stored.

  According to the tunnel excavation method according to the fifth invention, by a tunnel excavator comprising a cylindrical skin plate, propulsion means for advancing the skin plate, and an erector apparatus for assembling a segment to the inner peripheral surface of the tunnel, In the tunnel excavation method for excavating natural ground and assembling the segments to form a tunnel, an insertion hole is formed in a removable buffer member on the abutting surface of the propulsion means with the segment, and the insertion can be inserted into the insertion hole A storage means having a rod-shaped insertion member is connected to the erector apparatus, and a plurality of buffer members are stored in the storage means in a state where the insertion member is inserted into the insertion hole, and the erector apparatus is operated. By moving the buffer member, the insertion hole of the buffer member is inserted through the rod-shaped insertion member. No fear that 衝部 material falls, it is possible to secure the safety of the worker can easily accommodate a plurality of cushioning members. Moreover, since the storage means is connected to the erector apparatus, a large number of buffer members can be easily stored using the operation of the erector apparatus.

  According to a tunnel excavation method according to a sixth aspect of the present invention, in the tunnel excavation method according to the fifth aspect of the present invention, in the state where the insertion member is positioned in the vicinity of the propulsion means by operating the erector device, the buffer By attaching / detaching the member to / from the abutment surface, the insertion member is positioned in the vicinity of the propulsion jack. Performance can be ensured, and a plurality of buffer members can be easily accommodated.

  According to the tunnel excavation method according to the seventh invention, in the tunnel excavation method according to the fifth or sixth invention, the position of the central axis of the insertion hole by applying pressure to the plurality of buffer members from two different directions After the alignment, the insertion member can be easily inserted and removed by aligning the central axis of the insertion hole by inserting and removing the insertion member with respect to the insertion hole, and the cushioning member can be obtained by inserting and removing the insertion member. Can be easily exchanged.

It is explanatory drawing which shows the buffer rubber storage apparatus in the tunnel excavator which concerns on Example 1. FIG. It is explanatory drawing which shows the buffer rubber storage apparatus in the tunnel excavator which concerns on Example 1. FIG. It is explanatory drawing which shows the tunnel excavator which concerns on Example 1. FIG. It is explanatory drawing which shows the erector apparatus in the tunnel excavator which concerns on Example 1. FIG. It is explanatory drawing which shows the example of a change of the buffer rubber storage apparatus in the tunnel excavator which concerns on Example 1. FIG.

  Hereinafter, embodiments of a tunnel excavator according to the present invention will be described in detail with reference to the accompanying drawings. Needless to say, the present invention is not limited to the following examples, and various modifications can be made without departing from the spirit of the present invention.

  A structure of a tunnel excavator according to Embodiment 1 of the present invention will be described with reference to FIGS.

  As shown in FIG. 3, the tunnel excavator 1 includes a skin plate 10 having a cylindrical shape as an excavator body, and a disk shape that is rotatably mounted on a front portion (left side in FIG. 3) of the skin plate 10. The cutter head 11 and a propulsion jack (propulsion means) 12 and an erector device 13 provided at the rear portion (right side in FIG. 3) of the skin plate 10 are configured.

  The cutter head 11 is connected to a cutter turning motor 14 disposed behind the cutter head 11 via a gear mechanism such as a ring gear (not shown). By driving the cutter turning motor 14, the cutter head 11 is rotationally driven through a gear mechanism (not shown) so that the ground (the left side in FIG. 3) can be excavated.

  Further, a bulkhead 15 is attached to the skin plate 10 at the rear of the cutter head 11, and a chamber 10 a is formed between the cutter head 11 and the bulkhead 15. The cutter head 11, the cutter turning motor 14, and a gear mechanism (not shown) are supported by the skin plate 10 via the bulk head 15.

  A screw conveyor 16 is disposed inside the skin plate 10 so that the earth and sand excavated by the cutter head 11 can be discharged to the rear of the tunnel 100. That is, the front end portion (removal port) 61 of the screw conveyor 16 passes through the bulkhead 15 and opens into the chamber 10a, and a discharge port (not shown) provided in the rear portion is disposed in the longitudinal direction in the tunnel 100. Not on the belt conveyor. The screw conveyor 16 is configured such that screw wings 62 are rotatably mounted by a drive motor (not shown) inside a cylindrical tube that is disposed so as to be inclined rearward.

  The propulsion jack (propulsion means) 12 is installed inside the skin plate 10 and expands and contracts with respect to the existing segment S constructed (assembled) on the inner peripheral surface of the tunnel 100 as a lining member. A reaction force for excavating the plate 10, that is, the tunnel excavator 1, can be obtained. A number of propulsion jacks 12 are arranged at predetermined intervals in the circumferential direction of the skin plate 10 (see FIG. 4).

  As shown in FIG. 1, the propulsion jack 12 is provided with a drive rod 21 that extends rearward (right side in FIG. 1), and is provided at the tip of the drive rod 21 (right side end in FIG. 1). The spreader 22 is provided. Further, a cushioning rubber 23 as a cushioning member is detachably attached to the pressing surface (abutting surface) 22 a of the spreader 22. Although not shown in the drawings, the buffer rubber 23 in this embodiment has a flat plate shape formed by welding urethane rubber as an elastic member to a thin metal plate. The buffer rubber 23 is attached to and detached from the spreader 22 on the metal plate side. This is done by a bolt (not shown) in a state where the surface is in contact with the pressing surface 22a of the spreader 22.

  In the tunnel excavation work by the tunnel excavator 1 according to the present embodiment, when the steel segment S is assembled to the inner wall surface of the existing tunnel 100, the buffer rubber 23 is not attached to the pressing surface 22a of the spreader 22 ( When the concrete segment S is assembled to the inner wall surface of the existing tunnel 100, the buffer rubber 23 is attached (attached) to the pressing surface 22 a of the spreader 22. The work of attaching / detaching the buffer rubber 23 to / from the pressing surface 22a of the spreader 22 is performed by attaching a buffer rubber storage device (storage means) 17 described later to the erector device 13.

  As shown in FIGS. 3 and 4, the erector device 13 includes a turning ring 32 that is connected to the ring drive motor 31 and a U-shaped arm 34 that is connected to the lifting jack 33. A gripper device 18 is provided. The segment S and the buffer rubber storage device 17 can be moved in the circumferential direction, the radial direction, and the axial direction of the skin plate 10 by the operations of the erector device 13 and the gripper device 18.

  As shown in FIG. 3, a ring-shaped support frame 19 is fixed to the rear portion of the skin plate 10, and a plurality of support rollers 35 that are rotatable are attached to the support frame 19 along a circumferential direction via brackets 19a. (See FIG. 4). The outer periphery of the swivel ring 32 is in contact with the plurality of support rollers 35 and is supported rotatably. An inner tooth 32 a is formed on the inner peripheral portion of the swivel ring 32.

  A ring drive motor 31 is fixed to the support frame 19 via a bracket 19 b, and a drive gear 31 a of the ring drive motor 31 meshes with an internal tooth 32 a of the turning ring 32. Therefore, when the ring drive motor 31 is driven and the drive gear 31a is rotationally driven, the turning ring 32 can be turned through the inner teeth 32a with which the drive gear 31a is engaged.

  A pair of left and right fixed bases 36 are fixed to the swiveling ring 32 supported in this way, and a guide rod 37 is movably supported on each fixed base 36 (see FIGS. 3 and 4). One end (the lower end in FIG. 4) of each guide rod 37 is connected to the left and right end portions of the U-shaped arm 34 having a U-shape, and is supported so as to be movable together with the guide rod 37. Further, the left and right ends of the U-shaped arm 34 are connected to the tip of an elevating jack 33 fixed to the fixed base 36, and the elongating operation of the elevating jack 33 raises and lowers the U-shaped arm 34 and the guide rod 37 (skin The movement of the plate 10 in the radial direction) is free.

  The gripper device 18 is fixed to the central portion of the U-shaped arm 34. The gripper device 18 includes a gripper main body 81 that holds the segment S, a slide jack 82 for moving the gripper main body 81 in the tunnel axial direction, and a guide for moving the gripper main body 81 in the tunnel axial direction. Two guide rods 83 are provided.

  The gripper main body 81 is provided with a mounting bracket 84, and the mounting bracket 84 is formed with a through hole 84a for allowing the connecting pin 85 to pass when the pin is coupled to the segment S (FIGS. 1 and 2). reference). The segment S is held by the gripper device 18 in the elector device 13 by inserting the connecting pin 85 through the through hole of the mounting bracket (not shown) in the segment S and the through hole 84a of the mounting bracket in the gripper main body 81. The

  When the slide jack 82 is driven, the gripper main body 81 of the gripper device 18 moves relative to the U-shaped arm 34, and the segment S held by the gripper main body 81 of the gripper device 18 can be moved in the tunnel axis direction. When the above-described lifting jack 33 is driven, the gripper device 18 moves via the U-shaped arm 34, and the segment S held by the gripper device 18 can be moved in the radial direction. When the ring drive motor 31 is driven to turn the turning ring 32, the segment S held by the gripper device 18 can be moved in the circumferential direction along the inner wall surface of the tunnel 100.

  The gripper body 81 has support jacks (support members) 86a and 86b on both sides in the circumferential direction and both sides in the axial direction (radial) of the skin plate 10 with the mounting bracket 84 as a center for supporting the segment S. Provided (see FIGS. 1 and 2).

  When the segment S is held by the gripper device 18, the tip ends of the support jacks 86 a and 86 b are in contact with the inner peripheral surface of the segment S. Therefore, the holding posture of the segment S by the gripper device 18, that is, the holding angle of the segment S with respect to the gripper device 18 can be adjusted by extending and contracting each support jack 86 a and 86 b.

  Of course, the support members in the present invention are not limited to the four support jacks 86a and 86b in the present embodiment. For example, the holding angle in either the circumferential direction or the axial direction is set by the two support jacks 86a installed on both sides in the circumferential direction of the skin plate 10 or the two support jacks 86b installed on both sides in the axial direction of the skin plate 10. It may be configured to adjust the holding angle manually by limiting the holding angle in the circumferential direction or the axial direction by providing rod-like members (support rods) that do not expand and contract on both sides in the circumferential direction or both sides in the axial direction of the skin plate 10. You may make it do.

  The tunnel excavator 1 according to the present embodiment includes a shock-absorbing rubber storage device 17 that can be attached to the gripper device 18 in the erector device 13 (see FIG. 1). As shown in FIG. 1, the shock-absorbing rubber storage device 17 is inserted into a through-hole (insertion hole) 23 a formed substantially at the center of the shock-absorbing rubber 23, and an insertion rod (insertion member) 71 that supports the shock-absorbing rubber 23. A storage device main body (holding member) 74 having a substantially L-shaped cross section, which is composed of a rod support portion 72 (holding portion) that holds the insertion rod 71 and a connecting portion 73 that can be connected to the gripper device 18 in the elector device 13. It has.

  Here, the rod support portion 72 is configured to hold the insertion rod 71 so that the insertion rod 71 faces the axial direction of the skin plate 10, and the connecting portion 73 is formed at the end portion of the rod support portion 72 (the lower end portion in FIG. 1). ) To be substantially parallel to the insertion rod 71, that is, extending in the axial direction of the skin plate 10.

  The insertion rod 71 has a tapered portion 71a that is tapered at the tip (left side end in FIG. 1). Therefore, when the insertion rod 71 is inserted into the through hole 23a of the shock absorbing rubber 23 attached to the spreader 22 and the escape hole 22b formed in the spreader 22, the shift of the center axis between each other is allowed. Can be inserted.

  Further, a screw portion 71b is formed at the base end portion (right end portion in FIG. 1) of the insertion rod 71, and a threaded mounting hole 72a is formed at the rod support portion 72 of the storage device main body portion 74. Has been. Therefore, the insertion rod 71 and the storage device main body 74 are assembled by screwing the screw portion 71 b of the insertion rod 71 into the mounting hole 72 a of the rod support portion 72 in the storage device main body 74.

  The connecting portion 73 in the storage device main body 74 is provided with a mounting bracket 75 for connecting to the gripper device 18 of the erector device 13, and the mounting bracket 75 is formed with a through hole 75 a for allowing the connecting pin 85 to pass therethrough. (See FIGS. 1 and 2). That is, the gripper device 18 in the erector device 13 can hold not only the segment S but also the shock absorbing rubber storage device 17. Like the segment S, the gripper rubber storing device 17 is arranged in the circumferential direction and the radial direction of the skin plate 10. And can move in the axial direction.

  Further, the connecting portion 73 in the storage device main body 74 can support the support jacks 86a and 86b of the gripper device 18 so that the holding angle of the storage device main body 74, that is, the buffer rubber storage device 17, with respect to the gripper device 18 can be adjusted. It has a flat plate shape having an abutment surface (abutment portion) 73a that can abut against the surface.

  In the present embodiment, a stopper member (hooking means) 76 is provided so that the buffer rubber 23 stored in the buffer rubber storage device 17 does not come off from the insertion rod 71 (see FIG. 2). The retaining member 76 is provided in the vicinity of the distal end portion of the insertion rod 71 and is fixed to the connecting portion 73 with a bolt or the like (not shown). After the buffer rubber 23 is stored in the buffer rubber storage device 17, the stopper rubber 76 is attached from the distal end side of the insertion rod 71, so that the buffer rubber 23 is not caught by the stopper member 76 and falls off the insertion rod 71. .

  Of course, the hooking means in the present invention is not limited to the retaining member 76 in the present embodiment, and has a protruding portion or a groove portion on which the buffer member (buffer rubber 23) inserted into the insertion member (insertion rod 71) is hooked. I just need it. For example, the buffer rubber 23 may be hooked on the nut by threading the tip of the insertion rod 71 and attaching a nut (not shown), or by forming a concave groove in the tip of the insertion rod 71. 23 may be caught by the step of the groove.

Further, as shown in FIG. 5, a partition member 77 similar to the retaining member 76 may be provided between the buffer rubbers 23 when storing the plurality of buffer rubbers 23. The partition member 77 is provided with a through hole 77a for allowing the insertion rod 71 to pass therethrough, and is fixed to the connecting portion 73 of the storage device main body 74 with a bolt or the like. By providing the partition member 77 as described above, when a large number of shock absorbing rubbers 23 are accommodated, the inclination of the shock absorbing rubber 23 can be suppressed and the insertion rod 71 can be reinforced.

  The operation | movement which attaches / detaches the buffer rubber 23 in the tunnel excavator 1 which concerns on Example 1 of this invention is demonstrated with reference to FIGS.

  As shown in FIGS. 1 and 2, a buffer rubber storage device 17 is attached to the gripper device 18 in the elector device 13. That is, the mounting bracket 84 of the storage device main body 74 in the shock absorbing rubber storage device 17 is aligned with the mounting bracket 84 of the gripper device 18, and the connecting pin 85 is connected to the through hole 84 a of the mounting bracket 84 of the gripper device 18 and the shock absorbing rubber storage. The device 17 is connected by being inserted through the through hole 75a of the mounting bracket 75 of the storage device main body 74.

  In this way, by attaching the shock absorbing rubber storage device 17 to the gripper device 18 of the elector device 13, a propulsion jack in which a plurality of shock absorbing rubber storage devices 17 are arranged in the circumferential direction of the skin plate 10 using the operation of the elector device 13. The buffer rubber storage device 17 can be moved corresponding to each of the 12 installation positions.

  That is, by driving the ring drive motor 31 and turning the turning ring 32, the held buffer rubber storage device 17 is moved in the circumferential direction of the skin plate 10, and the elevating jack 33 is driven to expand and contract the drive rod 21. By doing so, the buffer rubber storage device 17 can be moved in the radial direction of the skin plate 10 via the U-shaped arm 34, and the buffer rubber storage device 17 can be moved in the vicinity of each propulsion jack 12 (FIG. 1 and FIG. 1). 4).

  In this way, after the buffer rubber storage device 17 is moved to the vicinity of the plurality of propulsion jacks 12 installed in the circumferential direction, the slide jack 82 is driven to move the buffer rubber storage device 17 along the guide rod 83 to the skin plate 10. The insertion rod 71 in the buffer rubber storage device 17 can be inserted into the through hole 23 a formed in the buffer rubber 23 and the escape hole 22 b formed in the pressing surface 22 a of the spreader 22.

  At this time, since the tapered portion 71a is formed at the tip of the insertion rod 71 in the shock absorbing rubber storage device 17, the displacement of the position of the shock absorbing rubber storage device 17 with respect to the spreader 22 is allowed. Since the axial center of the insertion rod 71 is allowed to shift with respect to the axial center of the hole 23a and the escape hole 22b of the spreader 22, the insertion rod 71 can be easily inserted into the insertion hole 23a of the buffer rubber 23 and the escape hole 22b of the spreader 22. be able to.

  The buffer rubber 23 attached to the spreader 22 is inserted in a state in which the insertion rod 71 in the buffer rubber storage device 17 is inserted into the through hole 23a formed in the buffer rubber 23 and the escape hole 22b opened to the pressing surface 22a of the spreader 22. Remove. At this time, the shock absorbing rubber 23 is supported by the insertion rod 71 in the shock absorbing rubber storage device 17 and therefore does not fall. Therefore, the safety of workers can be ensured.

  When the slide jack 82 is driven, the gripper main body 81 moves relative to the U-shaped arm 34, that is, the held buffer rubber storage device 17 is moved in the axial direction, and the insertion rod 71 in the buffer rubber storage device 17 is moved to the spreader. 22 can be pulled out from a relief hole 22b formed in the abutting surface 22a.

  Further, the insertion rod 71 in the buffer rubber storage device 17 is removed from the escape hole 22b formed in the pressing surface 22a of the spreader 22, and a retaining member 76 is attached to the distal end side of the insertion rod 71 (see FIG. 2).

  In this way, the buffer rubber 23 is stored in the buffer rubber storage device 17, and the stopper rubber 76 is attached to the distal end side of the insertion rod 71, so that the buffer rubber 23 stored when the buffer rubber storage device 17 is moved is obtained. It can be prevented from falling.

  Similarly, a plurality of shock absorbing rubbers 23 attached to the front ends of the plurality of propulsion jacks 12 arranged side by side in the circumferential direction of the skin plate 10 are easily removed while ensuring the safety of the worker, and the shock absorbing rubber storage device 17 can be stored.

  In addition, by moving the shock-absorbing rubber storage device 17 corresponding to each installation position of the propulsion jack 12 by a procedure reverse to the above, a plurality of shock-absorbing rubbers stored in the shock-absorbing rubber storage device 17 are transferred to the skin plate 10. Each of the plurality of propulsion jacks 12 arranged side by side in the circumferential direction can be attached to the distal end portion.

  Further, when the buffer rubber 23 stored in the buffer rubber storage device 17 needs to be replaced due to deterioration or damage, the insertion rubber 71 is pulled out from the through hole 23a in the buffer rubber 23 arranged in a plurality and stored. By removing from the apparatus main body 74, the buffer rubber 23 can be easily replaced.

  At this time, by arranging the through holes 23 a in the plurality of buffer rubbers 23, the insertion rod 71 can be easily inserted into and removed from the through holes 23 a of the buffer rubber 23. That is, by applying pressure from two different directions to the plurality of cushioning rubbers 23 arranged to align the central axis of the through hole 23a of the cushioning rubber 23, the through holes of the plurality of cushioning rubbers 23 can be easily obtained. 23 a can be aligned, and the insertion rod 71 can be easily inserted into and removed from the through hole 23 a of the buffer rubber 23.

  For example, as shown in FIG. 2, with one end (lower end in FIG. 2) of the plurality of shock absorbing rubbers 23 aligned by the connecting portion 73 of the shock absorbing rubber storage device 17, the shock absorbing rubber 23 is moved in a different direction (leftward in FIG. 2). Alternatively, the center axis of the through hole 23a of the buffer rubber 23 can be aligned by pressing from the right).

  As described above, according to the tunnel excavator 1 according to the present embodiment, it is easy to attach and detach the buffer rubber 23 to the pressing surface 22a of the spreader 22 even when the concrete segment and the steel segment are selectively used. Therefore, it is possible to suppress an increase in load on workers and a prolonged construction period.

DESCRIPTION OF SYMBOLS 1 Tunnel excavator 10 Skin plate 10a Chamber 11 Cutter head 12 Propulsion jack (propulsion means)
13 Electa device 14 Cutter turning motor 15 Bulk head 16 Screw conveyor 17 Buffer rubber storage device (storage means)
18 Gripper device 19 Support frame 19a Bracket 19b Bracket 21 Drive rod 22 Spreader 22a Pressing surface (abutting surface)
22b Escape hole 23 Buffer rubber (buffer member)
23a Through hole (insertion hole)
31 Ring drive motor 31a Drive gear 32 Swivel ring 32a Internal teeth 33 Lifting jack 34 U-arm 35 Support roller 36 Fixing base 37 Guide rod 61 Front end 62 Screw blade 71 Insertion rod (insertion member)
71a Taper part 71b Screw part 72 Bar support part (holding part)
72a Mounting hole 73 Connecting portion 73a Contact surface (contact portion)
74 Storage device body (holding member)
75 mounting bracket 75a through hole 76 retaining member (hooking means)
76a Through-hole 81 Gripper body 82 Slide jack 83 Guide rod 84 Mounting bracket 84a Through-hole 85 Connecting pin 86a Support jack (support member)
86b Support jack (support member)
100 tunnel S segment

Claims (7)

In a tunnel excavator comprising a cylindrical skin plate, propulsion means for advancing the skin plate, and an erector device for assembling a segment to the inner peripheral surface of the tunnel,
A flat plate-shaped cushioning member attached to the abutting surface with the segment in the propulsion means, and having an insertion hole;
A rod-shaped insertion member that supports the buffer member by being inserted into the insertion hole;
A tunnel excavator comprising: a holding portion that holds the insertion member; and a holding member that includes a connecting portion that can be connected to the erector apparatus. The holding portion is configured to hold the insertion member in the axial direction of the skin plate,
2. The tunnel excavator according to claim 1, wherein the connecting portion extends substantially in parallel with the insertion member from an end portion of the holding portion. 3. The tunnel excavator according to claim 1, further comprising a hooking unit provided at one end of the insertion member and having a protruding portion or a groove portion on which the buffer member inserted through the insertion member is hooked. . The erector device includes a support member that can come into contact with the segment when holding the segment;
The tunnel excavator according to any one of claims 1 to 3, wherein the holding member includes a contact portion that can contact the support member. A tunnel excavator comprising a cylindrical skin plate, propulsion means for advancing the skin plate, and an erector device for assembling the segment on the inner peripheral surface of the tunnel excavates natural ground and assembles the tunnel by assembling the segment. In the tunnel excavation method to form,
An insertion hole is formed in a cushioning member that can be attached to and detached from the abutting surface of the propulsion means with the segment, and a storage means having a rod-like insertion member that can be inserted into the insertion hole is connected to the erector device, and the insertion hole A tunnel excavation method characterized in that a plurality of the buffer members are stored in the storage means in a state where the insertion member is inserted into the storage means, and the buffer member is moved by operating the erector device. The tunnel excavation according to claim 5, wherein the buffer member is attached to and detached from the abutting surface in a state where the insertion member is positioned in the vicinity of the propulsion unit by operating the erector device. Construction method. The pressure is applied to the plurality of buffer members from two different directions to align the center axis of the insertion hole, and then the insertion member is inserted into and removed from the insertion hole. The tunnel excavation method according to claim 6.

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