JP6042735B2 - Segment feeding device - Google Patents

Description

  The present invention relates to a segment feeding device, and in particular, a segment feeding device that feeds a segment that has been transported to the rear of a shield machine by a transport carriage to the vicinity of a segment assembly erector disposed inside a skin plate. About.

  The shield construction method excavates the ground with a cutter while pressing the cut end surface of the shield machine with pressure from mud, muddy water, pressurized air, etc., and sequentially assembles the tunnel lining body with segments behind the shield machine However, it is a method of digging a tunnel in the ground. In the shield method, the skin plate, which is a cylindrical outer shell, has a cutter that cuts the cut end face, a compartment filled with excavated earth, excavated earth discharge device, and an extendable shield jack. And an erector device that assembles the segment, etc., while taking reaction force from the tunnel lining body just before being assembled inside the skin plate, push the skin plate forward in the direction of digging with a shield jack, By repeating the work of assembling a tunnel lining body on the inner surface of the skin plate, a shield tunnel is formed.

  And in shield construction by the shield construction method, it is necessary to send the segment to the vicinity of the elector device installed inside the skin plate with the advance of the shield machine, while the work space behind the elector device is The excavating earth and sand discharging device and various drive / control devices are provided, and the space is narrow, and it is difficult to transport a plurality of segments to the vicinity of the erector device at a time. For this reason, a plurality of segments that have been transported to the rear of the shield machine by the transport carriage through the inside of the tunnel lining body formed subsequent to the shield machine, one by one, roller conveyor and hoist type A method of feeding to the vicinity of the erector device using a transport device is employed (see, for example, Patent Document 1 and Patent Document 2).

Japanese Patent No. 3038355 Japanese Patent No. 3098745

  However, in the conventional method of feeding segments one by one to the vicinity of the erector device, especially when the inner diameter of the tunnel lining body is a small diameter or a medium diameter of about 2000 to 3000 mm, the hoist type conveying device is Since it becomes impossible to secure a suspension allowance, it becomes difficult to employ. In addition, in the method of feeding the segment while sliding on the roller conveyor installed in the invert part of the tunnel lining body, the heavy segment is transported while being pushed by a worker manually in a narrow space. If the tunnel is sloped, the physical burden on the worker may increase, and the segment may be displaced or slipped. Furthermore, since the segments are likely to contact each other, particularly when the segments are made of reinforced concrete, cracks and chips may occur, which may cause quality problems.

  The present invention can greatly reduce the manual work of workers when feeding a segment that has been transported to the back of a shield machine by a transport carriage to the vicinity of an erector device, and even if the tunnel has a gradient, It is an object of the present invention to provide a segment feeding device that can avoid the occurrence of escape or sliding, and that can avoid the occurrence of contact between segments.

  The present invention relates to a shield plate by means of a shield plate, a segment that has been transported to the rear of a shield machine by a carriage after passing through a tunnel lining body formed by a segment formed following the shield machine. A segment feeding device that feeds to the vicinity of an erector device for assembling a segment that is arranged inside, a fixed guide portion installed in an invert portion of the tunnel covering body, and guided by the fixed guide portion, A sliding movement part that slides in the axial direction of the tunnel lining body, and the fixed guide part is placed on both sides of a center part of the outer peripheral surface of the segment having an arcuate cross-sectional shape. A fixed-side support rail portion that slidably supports the The slide moving part is provided with a plurality of back feed preventing claw members at intervals, and the slide moving part is placed on both sides sandwiching the central part of the outer peripheral surface of the segment having an arcuate cross-sectional shape. A slide-side support rail portion that slidably supports the segment, and is provided with a plurality of supply claw members at predetermined intervals in the axial direction of the tunnel covering body, for preventing the reverse feed The claw member and the supply claw member are provided so as to protrude up and down with respect to the segment mounting surface of the fixed side support rail portion or the slide side support rail portion, and are directed toward the erector device. The tunnel covering body has a segment abutting surface on the front side in the axial direction, and an inclined portion that inclines downward from the segment abutting surface toward the rear side in the axial direction of the tunnel covering body. Being When the segment passes over the inclined portion from the rear in the axial direction and passes over the reverse feed preventing claw member or the supply claw member, the reverse feed preventing claw member or the supply claw member Achieves the above-mentioned object by providing a segment feeding device which is adapted to be immersed below the segment placement surface.

  And it is preferable that the segment feeding apparatus of this invention is provided with the sliding acceleration | stimulation layer in the said segment mounting surface of the said fixed side support rail part or the said slide side support rail part.

  In the segment feeding device of the present invention, it is preferable that the sliding acceleration layer is formed of a nylon plate or a Teflon (registered trademark) sheet attached to the segment mounting surface.

  Furthermore, the segment feeding device according to the present invention is a plate-like device in which the reverse feed preventing claw member and the feeding claw member rotate around a rotation axis extending in a direction perpendicular to the sliding direction of the slide moving unit. It is preferable that the segment abutment surface is urged so as to protrude upward from the segment placement surface in a state where the segment is not passed through the upper portion.

  Furthermore, in the segment feeding device according to the present invention, it is preferable that the slide moving unit is slidably moved in the axial direction of the tunnel covering body by being operated by hydraulic pressure.

  In the segment feeding device of the present invention, the shield machine is a mud pressure shield machine, and the hydraulic pressure for operating the slide moving unit is obtained from a hydraulic system of a screw conveyor. Is preferred.

  According to the segment feeding device of the present invention, when the segment transported to the rear of the shield machine by the transport carriage is sent to the vicinity of the erector device, it is possible to greatly reduce the manual work of the worker and to the tunnel. Even when there is a gradient, it is possible to avoid the occurrence of segment escape and sliding, and it is possible to avoid the occurrence of contact between segments.

It is a schematic longitudinal cross-sectional view explaining the situation which sends a segment to the vicinity of the erector apparatus provided in the shield machine by the segment feeding apparatus which concerns on preferable one Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view illustrating a configuration of a segment feeding device according to a preferred embodiment of the present invention, with a part seen through. It is an expanded sectional view explaining the structure of the nail | claw member for reverse feeding, and the nail | claw member for supply. A process of feeding a segment by a segment feeding device will be described. (A) is a top view and (b) is a longitudinal sectional view. A process of feeding a segment by a segment feeding device will be described. (A) is a top view and (b) is a longitudinal sectional view. A process of feeding a segment by a segment feeding device will be described. (A) is a top view and (b) is a longitudinal sectional view. A process of feeding a segment by a segment feeding device will be described. (A) is a top view and (b) is a longitudinal sectional view. A process of feeding a segment by a segment feeding device will be described. (A) is a top view and (b) is a longitudinal sectional view. A process of feeding a segment by a segment feeding device will be described. (A) is a top view and (b) is a longitudinal sectional view. A process of feeding a segment by a segment feeding device will be described. (A) is a top view and (b) is a longitudinal sectional view. A process of feeding a segment by a segment feeding device will be described. (A) is a top view and (b) is a longitudinal sectional view. A process of feeding a segment by a segment feeding device will be described. (A) is a top view and (b) is a longitudinal sectional view.

  As shown in FIG. 1, a segment feeding device 10 according to a preferred embodiment of the present invention includes a tunnel covering body 31 formed subsequent to a shield machine 30 in shield work by a mud pressure shield method, for example. Is a device for assembling the segments into a ring shape provided in the skin plate 34 of the shield machine 30 from the position behind the shield machine 30 that has been transported by the transport carriage 32. This was adopted as a device for feeding one piece at a time while avoiding interference with the excavating earth and sand discharging device 36 etc. up to the vicinity of the erector device 35. In addition, the segment feeding device 10 according to the present embodiment can efficiently and safely feed the segment 33 by machine operation without manual operation by an operator, and even when the tunnel has a gradient. It is possible to prevent the segment 33 from being displaced or slid.

  The segment feeding device 10 according to the present embodiment is, for example, in a shield construction by a mud pressure type shield construction method, and passes through the inside of the tunnel covering body 31 by the segment 33 formed subsequent to the shield excavator 30, 2 is a device for feeding the segment 33 transported to the rear of the shield machine 30 by 32 to the vicinity of the segment assembly erector device 35 arranged inside the skin plate 34 as shown in FIG. The fixed guide portion 11 is installed in the invert portion 31 a of the tunnel covering body 31, and the slide moving portion 12 is guided by the fixed guide portion 11 and slides in the axial direction X of the tunnel covering body 31.

  The fixed guide portion 11 includes a fixed-side support rail portion 13 that is placed on both sides of the central portion of the outer peripheral surface of the segment 33 having an arc-shaped cross-sectional shape and supports the segment 33 so as to be slidable. The back feed preventing claw members 14 are provided at a plurality of locations at predetermined intervals in the axial direction X of the covering body 31. The slide moving unit 12 includes slide-side support rail portions 15 that are placed on both sides of the central portion of the outer peripheral surface of the segment 33 having an arc-shaped cross-sectional shape and support the segment 33 so as to be slidable. The supply claw members 16 are provided at a plurality of locations at predetermined intervals in the axial direction X of the covering body 31.

  As shown in FIG. 3, the reverse feed preventing claw member 14 and the supply claw member 16 are provided with respect to the segment mounting surfaces 13 a and 15 a of the fixed side support rail portion 13 and the slide side support rail portion 15. The segment abutment surfaces 14a and 16a are provided on the front side in the axial direction X of the tunnel covering 31 toward the erector device 35, and are projected so as to be able to advance and retreat vertically. By providing the inclined portions 14b and 16b that are inclined downward from the surfaces 14a and 16a toward the rear in the axial direction X of the tunnel covering body 31, the segment 33 has the inclined portions 14b and 16b from the rear in the axial direction X. When passing over the reverse feed prevention claw member 14 and the supply claw member 16 so as to get over, the reverse feed prevention claw member 14 and the supply claw member 16 are below the segment placement surfaces 13a and 15a. Adapted to immersion (see two-dot chain line in FIG. 3).

  Moreover, in this embodiment, the sliding promotion layers 13b and 15b are provided in the segment mounting surfaces 13a and 15a of the fixed side support rail part 13 and the slide side support rail part 15 (refer FIG. 2).

  Further, in the present embodiment, the reverse feed preventing claw member 14 and the supply claw member 16 extend in a direction perpendicular or substantially perpendicular to the axial direction X of the tunnel covering body 31 which is also the sliding direction of the slide moving unit 12. A plate-shaped metal fitting that rotates about the rotating shaft 17 and the segment abutment surfaces 14a and 16a protrude above the segment placement surfaces 13a and 15a in a state where the segment 33 does not pass above. For example, it is in a state of being biased by a spring 18 (see FIG. 3).

  In this embodiment, the shield machine 30 is a mud pressure type, small or medium diameter shield machine capable of forming a tunnel lining body having an inner diameter of, for example, about 2000 to 3000 mm. . The shield machine 30 includes a partition wall 37a that forms a compartment 37a in which excavated soil is filled and accommodated in a cylindrical skin plate 34 that constitutes an outer shell, a driving device 39 that rotationally drives a rotary cutter 38, , A shield jack 40, an erector device 35, a screw conveyor 36a constituting a discharge device 36, a sludge discharge pipe 36b, and the like. The shield machine 30 is provided with a rotary cutter 38 rotatably supported by a partition wall 37 so as to cover the front end opening surface of the skin plate 34.

  Further, in the present embodiment, a transport carriage 32 that can travel along the laid track 41 is provided inside the tunnel lining body 31 formed subsequent to the shield machine 30, and this transport By the carriage 32, for example, a plurality of pieces can be simultaneously conveyed to the rear of the shield machine 30 by the segments 33 loaded at the start shaft. The segment 33 that has been transported is lifted piece by piece by the hoist type transport device 42 installed inside the tunnel lining body 31 and turned 90 °, and then the invar portion of the tunnel lining body 31 is 31a is sequentially placed on the segment feeding device 10 installed in a state avoiding interference with the discharging device 36 and the like, and using this segment feeding device 10, the vicinity of the elector device 35 one by one Will be sent to.

  In the present embodiment, the segment feeding device 10 includes the fixed guide portion 11 and the slide moving portion 12 as described above, and the excavating earth discharge device 36 and the like are provided on the invar portion 31a of the tunnel covering body 31. For example, the segments 33 which are installed one by one by the hoist type conveying device 42 are sequentially fed to the vicinity of the erector device 35.

  As shown in FIG. 2, the fixed guide portion 11 has, for example, a vertically long rectangular planar shape, and is a steel plate-like shape having a length three times or more the width (length) L1 of the segment 33 in the axial direction X. A pair of fixed-side support rail portions 13 provided on the side plate along the long sides on both sides of the bottom plate portion 19 over the entire length of the long sides. It is comprised including. The bottom surface 19 a of the bottom plate portion 19 has a curved surface with an arc-shaped cross section along the curved shape of the invar portion 31 a of the tunnel covering body 31.

  The fixed-side support rail portion 13 is provided so as to protrude in a step shape higher than the upper surface of the bottom plate portion 19, and the upper surface is a segment placement surface 13 a. In the present embodiment, the segment placement surface 13a is a curved surface having an arcuate cross section along the curved shape of the outer peripheral surface of the segment 33. Further, the nail opening 20 is provided on the segment placement surface 13a with a predetermined interval slightly larger than the width L1 of the segment 33 in the axial direction X. Two portions are formed at the positions to be divided. Through these nail openings 20, a reverse feed preventing nail member 14 is provided so as to protrude up and down with respect to the segment placement surface 13a. The inside of the fixed-side support rail portion 13 is preferably a hollow portion, and the reverse feed preventing claw member 14, the rotating shaft 17, and the spring 18 are disposed in the hollow portion.

  In the present embodiment, the concave portion sandwiched between the pair of fixed side support rail portions 13 on both sides on the upper surface of the bottom plate portion 19 of the fixed guide portion 11 becomes the guide concave portion 21 that guides the slide movement of the slide moving portion 12. The slide moving part 12 is accommodated in the guide recess 21 so as to be slidable. In the guide recess 21, a belt-like traveling plate 22 whose upper surface is a flat surface extends along the entire inner surface of the fixed support rail 13 on both sides and extends over the entire length of the fixed support rail 13. Each is provided. When the traveling wheel 23 attached to the side surface portion of the slide moving unit 12 travels on the upper surface of the belt-shaped traveling plate 22, the slide moving unit 12 is guided by the guide concave portion 21, and the axial direction of the tunnel covering body 31. It is possible to smoothly slide to X.

  Moreover, in this embodiment, the sliding promotion layer 13b is provided in the segment mounting surface 13a of the upper surface of the fixed side support rail part 13 of both sides, respectively. The sliding promotion layer 13b can be preferably formed using a nylon plate or a Teflon (registered trademark) sheet as a material or member that makes the surface easy to slip. The sliding promotion layer 13b made of a nylon plate, a Teflon (registered trademark) sheet, or the like can be easily attached by laying them along the segment placement surface 13a and by bonding or fixing them. Since the sliding support layer 13b is provided on the segment placement surface 13a of the fixed support rail portion 13, the slide moving portion 12 is slid in the axial direction X, and the placed segment 33 is moved to the erector device 35. (See FIGS. 5, 8, and 11), the segments are placed on the fixed-side support rail portion 13 while sliding smoothly while reducing the frictional force with the outer peripheral surface of the segment 33. The segment 33 can be easily moved forward along the surface 13a.

  The fixed guide portion 11 is provided at an appropriate position by a fixing means such as a bolt fixing hole for fixing the fixed guide portion 11 to the invar portion 31 a of the tunnel covering body 31.

  The slide moving unit 12 is a steel plate-like member having a length of three times or more of the width (length) L1 of the segment 33 in the axial direction X, for example, having a vertically long rectangular planar shape, Part 24 and a pair of slide-side support rail parts 15 provided on the side edge portions along the long sides on both sides of the bottom plate part 24 over the entire length of the long side. . The bottom surface 24a of the bottom plate portion 24 is a flat surface.

  The slide-side support rail portion 15 is provided so as to protrude in a step shape higher than the upper surface of the bottom plate portion 24, and the upper surface is a segment placement surface 15a. In the present embodiment, the segment placement surface 15a is a curved surface having an arcuate cross section along the curved shape of the outer peripheral surface of the segment 33. Similarly, the segment mounting surface 15a of the slide-side support rail portion 15 forms a concentric arc-shaped curved surface together with the segment mounting surface 13a of the fixed-side support rail portion 13 whose cross section is an arc-shaped curved surface. doing. As a result, the segment 33 placed on the segment feeding device 10 is placed on the fixed side support rail portion 13 at the portion where the fixed side support rail portion 13 and the slide side support rail portion 15 are arranged in parallel. The placement surface 13a and the segment placement surface 15a of the slide-side support rail portion 15 are straddled and can be placed on these simultaneously.

  Further, the nail opening 20 is provided on the segment mounting surface 15a at a predetermined interval slightly larger than the width L1 of the segment 33 in the axial direction X. Two parts are formed at equal dividing positions. Through these claw openings 20, the supply claw member 16 is provided so as to protrude up and down with respect to the segment placement surface 15a. The inside of the slide side support rail portion 15 is preferably a hollow portion, and the supply claw member 16, the rotating shaft 17, and the spring 18 are disposed in the hollow portion.

  In the present embodiment, traveling wheels 23 are attached to a plurality of locations at predetermined intervals in the axial direction X on the outer side surface portions of the slide-side support rail portions 15 on both sides of the slide moving portion 12. . When these traveling wheels 23 travel on the upper surface of the strip-shaped traveling plate 22 provided on both sides of the guide recess 21 of the fixed guide portion 11, the slide moving portion 12 is guided by the guide recess 21 and tunnel lining is performed. It is possible to smoothly slide the body 31 in the axial direction X.

  Further, in the present embodiment, the segment 33 is formed between the rear end portions of the slide-side support rail portions 15 on both sides of the slide moving portion 12 and the supply claw member 16 disposed on the rear side in the axial direction X. The push-in support bases 25 are provided so as to protrude upward from the segment placement surface 15a with a predetermined interval slightly larger than the width L1 in the axial direction X. By bringing these push-in support bases 25 into contact with the rear end surfaces of the segments 33, the segments 33 arranged between the push-in support bases 25 and the rear supply claw member 16 are moved forward of the slide moving unit 12. It can be pushed toward the erector device 35 in accordance with the slide movement.

  Furthermore, in the present embodiment, the slide placement layers 15a on the upper surfaces of the slide support rails 15 on both sides are respectively provided with the sliding promotion layers 15b, like the segment placement surfaces 13a of the fixed support rails 13. Is provided. By providing the slide promoting layer 15b on the segment mounting surface 15a of the slide side support rail portion 15, the slide movement portion 12 is slid in the axial direction X, and then the fed segment 33 is fixed to the fixed side support rail portion. When only the slide moving portion 12 is pulled back to the fixed guide portion 11 side while being placed on the 13 segment placement surfaces 13a (see FIGS. 6, 9, and 12), the segment placement surface 15a Only the slide moving part 12 can be easily slid to the fixed guide part 11 side while reducing the frictional force with the outer peripheral surface of the segment 33 and sliding it smoothly.

  Note that the slide moving unit 12 is provided with various drive mechanisms that are arranged below the bottom plate part 24, for example, to slide the slide moving unit 12 relative to the fixed guide unit 11.

  Here, it is preferable that the drive mechanism of the slide moving unit 12 is operated by hydraulic pressure to slide the slide moving unit 12 in the axial direction X of the tunnel lining body 31. In this embodiment, the shield machine 30 is a mud pressure type shield machine (see FIG. 1), and in the process of assembling the segment 33 by the erector device 35 to form the tunnel lining body 31, the shield machine For example, the screw conveyor 36a of the machine 30 does not need to be operated, so that the hydraulic pressure for operating the drive mechanism of the slide moving unit 12 when the segment 33 is assembled can be obtained from the hydraulic system of the screw conveyor 36a. The slide moving unit 12 can be efficiently driven without providing a new pump or the like.

  According to the segment feeding device 10 of the present embodiment having the above-described configuration, the segment 33 for forming the tunnel lining body 31 is transferred from the rear of the shield machine 30 to the erector device 35 as follows. In turn, it can be easily fed in one piece at a time.

  That is, in this embodiment, as shown in FIG. 1, the segment feeding is performed in the invar portion 31 a at the tip portion of the tunnel covering body 31 that is partially formed inside the skin plate 34 of the shield machine 30. The fixed guide portion 11 is fixed to the invar portion 31a in a state where the device 10 is extended rearward from the vicinity of the erector device 35 to a position where the discharge device 36 is displaced while avoiding interference with the discharge device 36 and the like. Then, the segment feeding device 10 is installed in the invar portion 31a below the discharging device 36 or the like.

  Thereafter, as shown in FIGS. 4A and 4B, the slide moving unit 12 is lifted up by the hoist type conveying device 42 in a state where the slide moving unit 12 is retracted to the rear end portion in the axial direction X of the fixed guide unit 11. The segment 33 that has been conveyed one piece at a time is aligned with the axial direction X of the tunnel covering 31 and the arc-shaped outer peripheral surface of the segment 33 is fixed to the fixed support rail portion 13 of the fixed guide portion 11. A reverse feed prevention claw placed on the segment placement surface 13a and the placement surface 15a of the slide-side support rail portion 15 of the slide moving unit 12 and arranged on the rear side in the axial direction X in the segment feeding device 10 It installs in the part between the member 14 and the nail | claw member 16 for supply, and the pushing support stand 25 of the rear-end part of the slide side support rail part 15. FIG.

  Next, as shown in FIGS. 5A and 5B, the slide moving unit 12 is moved forward of the axial direction X by about one third of the length of the slide moving unit 12 with respect to the fixed guide unit 11. The segment 33 is slid to the rear end surface, and the rear support surface 25 is brought into contact with the rear end surface, while the rear-side reverse feed-preventing claw member 14 and the front-side claw member 14 in the fixed-side support rail portion 13 of the fixed guide portion 11 Advance to the portion between the claw member 14 for preventing reverse feeding. When the segment 33 is advanced in this way, the segment 33 moves while sliding the outer peripheral surface on the segment placement surface 13 a of the fixed-side support rail portion 13.

  In addition, when the segment 33 moves forward along the fixed-side support rail portion 13, it passes through the rear-side reverse-feed preventing claw member 14 that protrudes upward from the segment placement surface 13a. Since the segment 33 passes over the inclined portion 14b from the rear in the axial direction X and passes above the reverse feed preventing claw member 14, the reverse feed preventing claw member 14 depends on the weight of the segment 33. It will be immersed below the segment mounting surface 13a (see FIG. 3). This makes it possible to smoothly advance the segment 33 along the segment placement surface 13a without hindering the sliding of the segment 33 by the reverse feed preventing claw member 14. After the segment 33 passes, the reverse feed preventing claw member 14 returns to a state of projecting from the segment placement surface 13a by the biasing force of the spring 18, for example.

  Next, as shown in FIGS. 6 (a) and 6 (b), the segment 33 that has been moved forward is left by sliding the slide moving portion 12 backward with respect to the fixed guide portion 11 in the axial direction X. As it is, only the slide moving part 12 is retracted to the rear end part in the axial direction X of the fixed guide part 11. Thus, when only the slide moving part 12 is retracted, the segment placement surface 15 a of the slide side support rail part 15 places the advanced segment 33 on the segment placement surface 13 a of the fixed side support rail part 13. In this state, it slides backward while sliding along the outer peripheral surface of the segment 33.

  Here, when the slide moving unit 12 is slid back in the axial direction X with respect to the fixed guide unit 11, the segment 33 is segmented by frictional force with the segment mounting surface 15 a of the slide side support rail unit 15. The rear end surface of the segment 33 protrudes from the segment placement surface 13a of the fixed-side support rail portion 13 even when attempting to move rearward together with the slide moving portion 12 while being placed on the placement surface 15a. The movement to the rear is prevented by contacting the segment abutting surface 14a of the reverse feed preventing claw member 14 that has returned to the position, and the segment 33 is not fed back, and the fixed side support rail portion 13 The state of being left in the portion between the rear-side reverse feed prevention claw member 14 and the front-side reverse feed prevention claw member 14 is maintained.

  In addition, the rear supply claw member 16 protruding from the segment placement surface 15a of the slide side support rail portion 15 has the remaining segment 33 when the slide movement portion 12 slides rearward in the axial direction X. Although interfering with the end face, as the slide movement unit 12 slides backward in the axial direction X, the remaining segment 33 is inclined from the rear in the axial direction X to the rear claw member 16 for supply. Since it passes over the supply claw member 16 so as to get over the portion 16b, the supply claw member 16 is immersed below the segment placement surface 15a due to the weight of the segment 33 (FIG. 3). Accordingly, the slide moving unit 12 can be retracted without hindering the sliding of the segment placement surface 15a by the supply claw member 16. After passing through the segment 33, the supply claw member 16 returns to a state of protruding from the segment placement surface 15a, for example, by the biasing force of the spring 18.

  Next, as shown in FIGS. 7A and 7B, the segment moving device 12 is left in the state where the slide moving unit 12 is retracted to the rear end of the axial direction X of the fixed guide unit 11. Between the back-feed preventing claw member 14 and the feeding claw member 16 disposed behind the segment 33 on the rear side in the axial direction X and the pushing support base 25 at the rear end portion of the slide-side support rail portion 15. The segment 33 that is lifted by the hoist type conveying device 42 and conveyed one piece at a time is placed on the segment placement surface 13a of the fixed side support rail portion 13 and the placement surface 15a of the slide side support rail portion 15. Install by placing.

  Next, as shown in FIGS. 8A and 8B, the slide moving unit 12 is moved forward of the axial direction X by about one third of the length of the slide moving unit 12 with respect to the fixed guide unit 11. The two-piece segment 33 is fixedly supported by the fixed guide portion 11 while the segment contact surface 16a of the rear supply claw member 16 and the pushing support base 25 are brought into contact with the rear end surface. The rail portion 13 is advanced to a portion on the front side of the front-side reverse feed prevention claw member 14 and a portion between the front-side reverse feed prevention claw member 14 and the rear-side reverse feed prevention claw member 14. When the two-piece segments 33 are simultaneously advanced in this way, each segment 33 moves to the segment placement surface 13a of the fixed support rail portion 13 while sliding the outer peripheral surface. .

  Further, when the two-piece segment 33 moves forward along the fixed-side support rail portion 13, the two-piece segment 33 passes through the front and rear claw members 14 for preventing reverse feeding protruding upward from the segment placement surface 13 a. It will be. As described above, the two-piece segment 33 passes over the front and rear claw members 14 on the front side and the rear side so as to get over the inclined portion 14b from the rear in the axial direction X. The reverse feed preventing claw member 14 is immersed below the segment placement surface 13a due to the weight of the segment 33 (see FIG. 3). Thus, each segment 33 can be advanced along the segment placement surface 13a without hindering the sliding of the two-piece segments 33 by the reverse feed preventing claw member 14. After the segment 33 has passed, each of the reverse feed preventing claw members 14 returns to a state of projecting from the segment placement surface 13a due to the biasing force of the spring 18, for example.

  Next, as shown in FIGS. 9A and 9B, the two-piece segment 33 is moved forward by sliding the slide moving portion 12 backward relative to the fixed guide portion 11 in the axial direction X. Only the slide moving part 12 is retracted to the rear end part in the axial direction X of the fixed guide part 11 while leaving In this way, when only the slide moving part 12 is retracted, the segment placement surface 15a of the slide side support rail part 15 causes the two piece segment 33 that has been advanced to the segment placement surface 13a of the fixed side support rail part 13. While being placed on each of the segments 33, the segment 33 slides backward while sliding along the outer peripheral surface of the segment 33.

  Here, when the slide moving unit 12 is slid backward in the axial direction X with respect to the fixed guide unit 11, each segment 33 is caused by frictional force with the segment placement surface 15 a of the slide side support rail unit 15. Even when trying to move rearward together with the slide moving part 12 while being placed on the segment placing surface 15 a, the rear end surface of these segments 33 is the segment placing surface 13 a of the fixed side support rail portion 13. The two-piece segment 33 is reversely fed by abutting against the segment abutment surface 14a of the front and rear reverse feed claw members 14 that have returned to the state of protruding from the rear side. The front-side reverse feed preventing claw member 14 of the fixed-side support rail 13 and the front-side reverse feed-preventing claw member 14 and the rear-side reverse feed-preventing claw portion It will retain the state of being left on the portion between the 14.

  Further, the front and rear supply claw members 16 protruding from the segment placement surface 15a of the slide side support rail portion 15 are left behind when the slide moving portion 12 slides rearward in the axial direction X. Each piece 33 that interferes with the end surface of the segment 33 of the piece is slid rearward in the axial direction X of the slide moving unit 12. Since each of the supply claw members 16 passes above the supply claw member 16 so as to get over the inclined portion 16 b of the rear supply claw member 16, the supply claw member 16 is segmented by the weight of the segment 33. It will be immersed below the mounting surface 15a (see FIG. 3). Accordingly, the slide moving unit 12 can be retracted without hindering the sliding of the segment placement surface 15a by the supply claw member 16. After passing through the segment 33, each supply claw member 16 returns to a state of projecting from the segment placement surface 15 a by the biasing force of the spring 18, for example.

  Next, as shown in FIGS. 10A and 10B, the slide moving unit 12 is left in the segment feeding device 10 with the slide moving unit 12 retracted to the rear end portion in the axial direction X of the fixed guide unit 11. Further, the back feed preventing claw member 14 and the supply claw member 16 disposed on the rear side in the axial direction X behind the two-piece segment 33, and the pushing support base 25 at the rear end portion of the slide side support rail portion 15. The segment 33, which is lifted by the hoist type conveying device 42 and conveyed one piece at a time, is placed on the segment placement surface 13a of the fixed support rail portion 13 and the slide support rail portion 15 It installs by mounting in the surface 15a.

  Next, as shown in FIGS. 11A and 11B, the slide moving unit 12 is moved forward of the axial direction X by about one third of the length of the slide moving unit 12 with respect to the fixed guide unit 11. The three-piece segment 33 is slid to the rear end surface, the segment contact surface 16a of the front supply claw member 16 on the rear end surface, the segment contact surface 16a of the rear supply claw member 16, and the push-in support base 25. , A portion directly below the circumferential track of the erector device 35 (see FIG. 1) that protrudes forward from the fixed guide portion 11, and the reverse of the front side of the fixed-side support rail portion 13 of the fixed guide portion 11. The forward movement preventing claw member 14 is advanced to the front side part or the part between the front reverse feeding prevention claw member 14 and the rear backward feeding prevention claw member 14. When the three-piece segments 33 are simultaneously advanced in this way, each segment 33 moves to the segment placement surface 13a of the fixed side support rail portion 13 while sliding the outer peripheral surface. .

  Further, when the three-piece segment 33 advances along the fixed-side support rail portion 13, the rear two-piece segment 33 is fed back and forward from the segment placement surface 13a. It passes through the prevention claw member 14. Since the rear two-piece segment 33 passes over the inclined portion 14b from the rear in the axial direction X and passes above the front and rear reverse feed pawl members 14 as described above. These reverse feed preventing claw members 14 are immersed below the segment placement surface 13a due to the weight of the segment 33 (see FIG. 3). This makes it possible to advance each segment 33 along the segment placement surface 13a without hindering the back-feeding claw member 14 from sliding on the rear two-piece segment 33. After the segment 33 has passed, each of the reverse feed preventing claw members 14 returns to a state of projecting from the segment placement surface 13a due to the biasing force of the spring 18, for example.

  Of the three-piece segments 33 that have advanced simultaneously as described above, the segment 33 that is located at the front end portion and that projects in front of the fixed guide portion 11 is located in the vicinity of the elector device 35 as an elector device. Since it is sent to a portion directly below the track in the circumferential direction of 35, the assembly operation of the tunnel covering body 31 is easily and smoothly performed by gripping the sent segment 33 of the front end by the erector device 35. It becomes possible to do.

  When the segment 33 is gripped by the erector device 35, the slide moving unit 12 is slid rearward in the axial direction X with respect to the fixed guide unit 11, so that the remaining two pieces of the segment 33 are left untouched as shown in FIG. As shown in a) and (b), only the slide moving portion 12 is retracted to the rear end portion in the axial direction X of the fixed guide portion 11. As a result, the segment feeding device 10 includes the back-feed preventing claw member 14 and the feeding claw member 16 disposed on the rear side in the axial direction X, and the slide side, as in FIGS. 9 (a) and 9 (b). Since the segment 33 lifted by the hoist type conveying device 42 and conveyed one by one can be installed in a portion between the support rail portion 15 and the pushing support base 25 at the rear end portion. Thereafter, the steps shown in FIGS. 10 (a), 10 (b) to 12 (a), 12 (b) are repeated, so that the segments 33 can be smoothly fed one by one to the vicinity of the erector device 35 one by one. The work body 31 can be efficiently assembled in a ring shape.

  Here, when the tunnel lining body 31 is assembled in a ring shape, the K segment, which is the last segment to be assembled, is a segment having a different shape with a shorter circumferential length than the other segments 33. However, by attaching a pressing jig having a shape substantially the same as the cross-sectional shape of the other segment, for example, to the rear end face of the K segment so as to be detachable, the sliding support rail is attached to the pressing jig. By bringing the pushing support base 25 of the portion 15 and the segment abutting surface 16a of the supply claw member 16 into contact, the K segment is moved by the segment feeding device 10 in the same manner as the other segments 33 of the shield machine 30. It can be easily fed from the rear to the vicinity of the erector device 35.

  And according to the segment feeding apparatus 10 of this embodiment provided with the above-mentioned structure, when sending the segment 33 conveyed to the back of the shield machine 30 by the conveyance carriage 32 to the vicinity of the erector apparatus 35, the work It is possible to greatly reduce the manual labor of the worker, and it is possible to avoid the segment 33 from being displaced or slid even when the tunnel is inclined, and the contact between the segments 33 can be prevented. It is possible to avoid the occurrence.

  That is, according to the present embodiment, the segment feeding device 10 includes the fixed guide portion 11 installed in the invert portion 31 a of the tunnel lining body 31 and the sliding movement that slides in the axial direction X of the tunnel lining body 31. The fixed guide portion 11 includes a fixed-side support rail portion 13 that slidably supports the segment 33 and includes a back feed preventing claw member 14. The slide moving portion 12 includes A slide-side support rail portion 15 that slidably supports 33 is provided, and a supply claw member 16 is provided at a predetermined interval in the axial direction X of the tunnel covering body 31. Further, the reverse feed preventing claw member 14 and the supply claw member 16 are provided so as to protrude up and down with respect to the segment mounting surfaces 13a and 15a of the fixed side support rail portion 13 and the slide side support rail portion 15. In addition, it is provided with segment contact surfaces 14a and 16a on the front side and inclined portions 14b and 16b inclined downward toward the rear, so that the segment 33 gets over the inclined portions 14b and 16b from the rear. When passing over the reverse feed preventing claw member 14 and the supply claw member 16, the reverse feed preventing claw member 14 and the supply claw member 16 are immersed below the segment placement surfaces 13 a and 15 a. It has become.

  Thus, according to the present embodiment, according to the above-described steps, the slide 33 is sequentially supplied to the predetermined position of the segment feeding device 10 while the segments 33 conveyed one by one by the conveying device 42 are sequentially supplied to the predetermined position of the segment feeding device 10. By simply operating the machine forward and backward with respect to the fixed guide portion 11, the segments 33 can be moved one by one to the vicinity of the erector device 35 efficiently and safely without the manual operation of the operator. It becomes possible to send in.

  Further, according to the present embodiment, the segment 33 that has advanced by sliding the slide moving part 12 forward relative to the fixed guide part 11 is reversely projected from the segment placement surface 13 a of the fixed side support rail part 13. Since the backward movement is prevented by contacting the segment contact surface 14a of the feeding preventing claw member 14, the reverse of the segment 33 when the slide moving part 12 is moved backward relative to the fixed guide part 11 In addition to avoiding the feeding, even when the tunnel has a gradient, it is possible to prevent the segment 33 from escaping or sliding by the claw member 14 for preventing reverse feeding and reliably avoid it.

  Furthermore, according to the present embodiment, the segment 33 placed on the segment feeding device 10 is partitioned by the reverse feed preventing claw member 14 and the feeding claw member 16 arranged at a predetermined interval. Since the fixed side support rail portion 13 and the slide side support rail portion 15 are arranged side by side in the three regions of the segment placement surfaces 13a and 15a, the reverse feed preventing claw member 14 and the supply member are provided between the adjacent segments 33. By interposing the claw member 16, the contact of these segments 33 is avoided, and when the segments are fed using the segment feeding device 10, the segments 33 are broken or broken by the mutual contact of the segments 33. It is possible to surely avoid the occurrence of chipping and deterioration of quality.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the fixed guide portion and the slide moving portion are not necessarily plate-shaped members, and may be frame-shaped members or the like. The reverse feed prevention claw member and the supply claw member provided in the fixed guide part and the slide moving part do not necessarily have to be provided at two predetermined positions in the axial direction of the tunnel covering body, and the segments to be sent out Depending on the number of pieces, etc., they can be provided at three or more locations at predetermined intervals in the axial direction. The claw member for preventing reverse feeding and the claw member for supply can be moved up and down through the claw opening by forming a claw opening on the segment mounting surface of the fixed side support rail part or the slide side support rail part. It is not always necessary to make it protrude, and a claw member for preventing reverse feeding and a claw member for supply are provided adjacent to the fixed-side support rail portion and the slide-side support rail portion, and protrude from the segment mounting surface so as to be able to advance and retract You can also.

  Further, it is not always necessary to provide the slide side support rail portion of the slide moving portion inside the fixed side support rail portion of the fixed guide portion, and the slide side of the slide moving portion is outside the fixed side support rail portion of the fixed guide portion. A support rail can also be provided. It is not always necessary to provide a pair of fixed side support rails and slide side support rails on both sides of the fixed guide part and slide moving part, and one or three or more are provided with the slide moving part being slidable. It may be done.

  Furthermore, the shield machine is not necessarily a mud pressure shield machine, and may be a muddy shield machine or the like. The slide moving part may be operated by a drive mechanism other than hydraulic pressure, and it is always necessary to provide a sliding promotion layer on the fixed side support rail part or the segment mounting surface of the slide side support rail part. No. The reverse feed preventing claw member and the supply claw member may be biased so as to protrude upward from the segment placement surface by an urging means other than a spring, for example, so as to protrude upward due to the action of its own weight. It may be energized.

DESCRIPTION OF SYMBOLS 10 Segment feeding apparatus 11 Fixed guide part 12 Slide moving part 13 Fixed side support rail part 13a, 15a Segment mounting surface 13b, 15b Sliding acceleration | stimulation layer 14 Reverse feed prevention nail | claw member 14a, 16a Segment contact surface 14b, 16b Inclined portion 15 Slide-side support rail portion 16 Supply claw member 17 Rotating shaft 18 Spring 25 Pushing support base 30 Shield engraving machine 31 Tunnel lining body 31a Invert portion 32 Conveying carriage 33 Segment 34 Skin plate 35 Elector device 36 Device 36a Screw conveyor X Axial direction of tunnel lining body

Claims (6)

In shield construction by the shield construction method, the segment that has been transported to the rear of the shield machine by the transport carriage after passing through the tunnel lining body formed by the segment formed following the shield machine is placed inside the skin plate. A segment feeding device for feeding to the vicinity of the segmented erector device,
A fixed guide portion installed in the invert portion of the tunnel lining body, and a slide moving portion that is guided by the fixed guide portion and slides in the axial direction of the tunnel lining body,
The fixed guide portion includes a fixed-side support rail portion on which both sides sandwiching a central portion of the outer peripheral surface of the segment having an arc-shaped cross-sectional shape and slidably supports the segment, and the tunnel At a predetermined interval in the axial direction of the lining body, it is provided with claw members for preventing reverse feeding at a plurality of locations,
The slide moving portion has slide-side support rail portions that are placed on both sides of a central portion of the outer peripheral surface of the segment having an arcuate cross-sectional shape and slidably support the segment, and the tunnel The nail members for supply are provided at a plurality of locations at predetermined intervals in the axial direction of the lining body,
The reverse feed prevention claw member and the supply claw member are provided so as to protrude up and down with respect to the segment placement surface of the fixed side support rail portion or the slide side support rail portion, It has a segment abutment surface on the axially forward side of the tunnel covering body toward the erector device, and is inclined downward from the segment abutment surface toward the axially rearward side of the tunnel covering body. By providing the inclined portion, when the segment passes over the inclined portion from the rear in the axial direction and passes over the reverse feed preventing claw member and the supply claw member, the reverse feed preventing The segment feeding device is configured such that the claw member and the supply claw member are immersed below the segment placement surface.   The segment feeding device according to claim 1, wherein a sliding acceleration layer is provided on the segment placement surface of the fixed side support rail portion or the slide side support rail portion.   The segment feeding device according to claim 2, wherein the sliding promotion layer is formed of a nylon plate or a Teflon (registered trademark) sheet attached to the segment mounting surface.   The reverse feed preventing claw member and the supply claw member are formed of a plate-shaped metal fitting that rotates about a rotation axis extending in a direction perpendicular to the sliding direction of the slide moving portion, and the segment passes above. The segment feeding device according to any one of claims 1 to 3, wherein the segment abutting surface is biased so as to protrude upward from the segment mounting surface in a state where the segment is not in contact.   The segment feeding device according to any one of claims 1 to 4, wherein the slide moving unit is operated by hydraulic pressure to slide in the axial direction of the tunnel covering body.   6. The segment feeding apparatus according to claim 5, wherein the shield machine is a mud pressure shield machine, and the hydraulic pressure for operating the slide moving unit is obtained from a hydraulic system of a screw conveyor.

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