JP3652810B2 - Segment erector device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention was excavated and formed by a tunnel excavatortunnelThe present invention relates to a segment erector apparatus for assembling a segment to an inner wall surface of the slab.
[0002]
[Prior art]
  FIG. 8 shows an outline of a conventional general shield excavator.
[0003]
  As shown in FIG. 8, in a shield excavator for excavating the ground, a cutter head 102 is rotatably mounted on the front portion of a skin plate 101 having a cylindrical shape as an excavator body. A spoke 103 is fixed radially on the front surface, and a number of cutter bits 104 are fixed to the spoke 103. A ring gear 105 is fixed to the rear part of the cutter head 102, and a hydraulic motor 106 is attached to the skin plate 101, and a drive gear 107 of the hydraulic motor 106 is engaged with the ring gear 105. Accordingly, when the hydraulic motor 106 is driven to drive the drive gear 107 to rotate, the cutter head 102 can be rotated via the ring gear 105.
[0004]
  A bulk head 108 is attached to the skin plate 101 at the rear of the cutter head 102, and a chamber chamber 109 is formed between the cutter head 102 and the bulk head 108. The chamber chamber 109 has one end extending to the outside of the shield excavator and the other end of the mud pipe 111 and the other end of the mud pipe 111 are opened. An agitator 112 for stirring and mixing earth and sand and muddy water is installed.
[0005]
  In addition, a plurality of shield jacks 113 are arranged in the circumferential direction around the outer periphery of the rear portion of the skin plate 101, and the shield jacks 113 extend to the rearward direction of the shield excavator and are excavated on the inner peripheral surface of the tunnel. By pressing against the constructed existing segment S (not shown), the skin plate 101, that is, the entire shield excavator can be advanced by the reaction force. On the other hand, a segment erector 114 is provided at the center of the rear part of the skin plate 101. The segment erector 114 places a new segment S in a space between the skin plate 101 advanced by the shield jack 113 and the existing segment S. You can install it to build a tunnel.
[0006]
  Therefore, as shown in FIG. 8, in order to excavate and form a tunnel, first, a plurality of shield jacks 113 are extended, and the skin plate 101 is advanced by a pressing reaction force against the existing segment S. The cutter head 102 is rotated, and the front ground is excavated by a number of cutter bits 104. Then, the earth and sand excavated by the cutter bit 104 is taken into the chamber 109, supplied with water from the mud pipe 110, and the agitator 112 agitates and mixes the excavated earth and water and is discharged outside through the mud pipe 111. The Next, any one of the shield jacks 113 is operated in the contracting direction to form a space with the existing segment S, and a new segment S is mounted in this space by the segment erector 114. By repeating this operation, a tunnel having a predetermined length is excavated and formed.
[0007]
  By the way, the segment S is formed by a transport cart (not shown).tunnelThe above-mentioned grip device of the segment erector 114 holds the loaded segment, moves in the tunnel, and assembles the segment at a predetermined position on the inner wall surface of the tunnel. . In this case, conventionally, a holding pin provided in the grip device is fitted and locked in a holding hole in which the segment is formed, so that the segment can be held and lifted. However, in such segment erector 114,tunnelThere were problems such as a decrease in the effective hollow diameter, an increase in the size of the apparatus, and a complicated operation. In order to solve these problems, for example, there is one disclosed in Japanese Utility Model Publication No. 2-50500.
[0008]
  The vacuum-type segment grip device disclosed in this publication is provided with a drum that is movable forward and backward in the excavation direction at the rear of the tunnel excavator, and provided with a revolving ring that can be swung in the circumferential direction on the drum. A gripper device is provided that is movable in the front-rear direction and the radial direction, respectively. The gripper device has a segment holding plate divided into three, and a safety jack and a vacuum pad are mounted on each holding plate. Therefore, while holding the vacuum pad of the segment holding plate in contact with the segment and holding it, the safety jack is operated and the safety pin is inserted, and the held segment is moved to a predetermined position and this segment is placed on the inner wall surface of the tunnel. Will be assembled.
[0009]
[Problems to be solved by the invention]
  However, as described above, the vacuum-type segment grip device disclosed in Japanese Utility Model Laid-Open No. 2-50500 is configured such that the vacuum pad of the segment holding plate adsorbs the segment and operates the safety jack to insert the safety pin. This segment can be held. In this case, the safety pin is fitted into the segment, thereby preventing the positioning of the segment and the lateral displacement of the segment. This safety pin is inserted into the segment by operating the safety jack, but if the position of the safety pin and the hole position of the segment do not match, the safety pin cannot be inserted into the segment. Due to the fall of the segment. Therefore, in the past, the operator visually confirmed the insertion of the safety pin into the segment. However, such an operation is a burden on the operator, which is troublesome and requires a long work time.Will takeThere was a problem.
[0010]
  In addition, in a state where the vacuum pad of the segment holding plate is in contact with the segment, the segment is adsorbed with the vacuum pad space being evacuated by the operation of the electromagnetic valve. In this case, if a sufficient suction force cannot be obtained due to damage to the vacuum pad or the like, the held segments may be misaligned or dropped during assembly.
[0011]
  This invention solves such a problem, and it aims at providing the segment erector apparatus which aimed at the improvement of the operation | work of a segment assembly work, and safety | security.
[0012]
[Means for Solving the Problems]
  In order to achieve the above object, the segment erector apparatus of the invention of claim 1A swivel ring that can swivel along the circumferential direction of the tunnel excavated at the rear of the tunnel excavator is provided, and the swivel ring can move along the radial direction of the tunnel via a support extending at the rear of the excavation direction. In a segment erector apparatus that is mounted on the inner wall surface of the tunnel while holding the segment carried into the tunnel by the grip apparatus and configured to match the shape of the segment A guide frame, a vacuum pad attached to the outer surface of the guide frame and capable of adsorbing and holding the segment, a negative pressure generator connected to the vacuum pad via a pressure detector, and the plurality When the detected pressure value of one of the vacuum pads drops, the negative pressure of the other vacuum pad It is characterized in that comprises a control device for integer.
[0013]
  Therefore,tunnelWhen the guide frame approaches the segment carried in and negative pressure is applied while the vacuum pad is in close contact with the segment, the vacuum pad attracts and holds the segment. When one of the detected pressure values decreases, the control unit reduces the negative pressure of the other vacuum pad.adjustAs a result, the segment can be securely held and assembled at a predetermined location on the inner wall surface of the tunnel.
[0014]
  In the segment erector apparatus of the invention of claim 2,A safety pin that is movably provided in the guide frame and fits into the holding hole of the segment to assist the holding of the segment;A position detector is provided for detecting whether the safety pin is inserted into or removed from the holding hole of the segment.
[0015]
  Therefore, when the vacuum pad adsorbs and holds the segment, the position detector detects the safety pin being inserted into and removed from the holding hole of the segment, and when the controller confirms the insertion of the safety pin, the vacuum pressure is applied by applying a negative pressure. The pad can securely hold the segment.
[0016]
  According to a third aspect of the present invention, the segment erector apparatus is provided with a swivel ring which is turnable along the circumferential direction of the tunnel excavated at the rear part of the tunnel excavator, and the swivel ring is extended to the rear part in the excavation direction. Through the bodytunnelA grip device that is movable along the radial direction of thetunnelA segment erector apparatus that holds a segment carried in and is assembled to the inner wall surface of the tunnel, and a guide frame that is mounted on the grip device and set in accordance with the shape of the segment, and is movably provided on the guide frame A safety pin that fits into the holding hole of the segment and assists the holding of the segment, a position detector that detects fitting / detachment of the safety pin into the holding hole of the segment, and an outer surface of the guide frame A vacuum pad that can absorb and hold the segment, a negative pressure generator connected to the vacuum pad, and a negative pressure of the negative pressure generator based on a detection result of the position detector.ActAnd a control device.
[0017]
  Therefore,tunnelThe grip device moves with respect to the segment carried in, and the grip device is inserted into the holding hole of the segment with the guide frame approaching the segment and the vacuum pad closely contacting the segment. When the negative pressure generator is activated, the vacuum pad attracts and holds the segment. At this time, the position detector detects whether the safety pin is inserted into or removed from the holding hole of the segment, and the control device inserts the safety pin. Confirm the negative pressure of the negative pressure generator.ActAs a result, the grip device can reliably hold the segment. Thereafter, the grip device moves in the longitudinal direction, the radial direction, and the circumferential direction of the tunnel while holding the segment, and the segment held at a predetermined position on the inner wall surface of the tunnel is assembled.
[0018]
  The segment erector apparatus according to claim 4, wherein the vacuum pad is divided into a plurality of parts, each vacuum pad and the negative pressure generator are individually connected to a pipe, and an electromagnetic valve and a pressure detector are connected to each pipe. The controller controls the negative pressure of the negative pressure generator based on the detection result of the position detector and the pressure detector.adjustAt the same time, the electromagnetic valve is opened and closed.
[0019]
  Therefore, the control device reduces the negative pressure of the negative pressure generator based on the detection results of the position detector and the pressure detector.adjustWhen the vacuum pad is damaged, the detection value of the pressure detector decreases, the controller checks the vacuum pad for damage, closes the corresponding solenoid valve, and closes the remaining vacuum pads. Renew negative pressureAdjustThe segment is securely held by this vacuum pad.
[0020]
  6. The segment erector apparatus according to claim 5, wherein the support body is provided with a plurality of grip devices, and each of the plurality of grip devices can be controlled in posture by each guide frame having a shape set in accordance with a segment having a different shape. And saidtunnelA vacuum pad that is supported so as to be movable in the front-rear direction and that can attract and hold the segment is mounted on the outer surface of each guide frame.
[0021]
  Therefore,tunnelThe grip device corresponding to multiple types of segments carried in moves, the guide device that fits the segment approaches, and the vacuum pad attached to the outer surface is in close contact with the segment By operating the negative pressure generator, the vacuum pad can reliably hold the segment by suction.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0023]
  FIG. 1 is a schematic side view of a segment erector apparatus according to an embodiment of the present invention attached to a shield excavator, FIG. 2 is a front view of the segment erector apparatus, FIG. 3 is a sectional view taken along line IV-IV in FIG. 3, FIG. 5 is a sectional view taken along line VV in FIG. 4, FIG. 6 is an arrangement of vacuum pads attached to the guide frame, and FIG.
[0024]
  The shield excavator to which the segment erector apparatus of the present embodiment is attached is substantially the same as that described in the above-described prior art, and detailed description thereof is omitted.
[0025]
  As shown in FIG.1 and FIG.2, in the segment erector apparatus 10 of this embodiment, the ring-shaped fixing plate 12 is being fixed to the rear part of the cylindrical skin plate 11 which comprises an excavator main body, and this fixed A plurality of shield jacks 13 arranged in parallel in the circumferential direction are attached to the plate 12. The fixing plate 12 is provided with a radial roller 15 along a circumferential direction via a support bracket 14, and a rotating ring 16 is rotatably supported by the radial roller 15. Is formed. Further, a hydraulic motor 19 is fixed to the fixed plate 12 by a bracket 18, and a drive gear 20 of the hydraulic motor 19 meshes with the internal teeth 17 of the turning ring 16.
[0026]
  In addition, support blocks 21 extend on the left and right sides of the swivel ring 16 at the rear of the excavation direction, and support cylinders 22 are fixed to the left and right support blocks 21, respectively. The left and right support cylinders 22 have two front and rear guide rods 23a and 23b, respectively.tunnelThe front guide rod 23a is connected on both sides by the lower arm 24a, and the rear guide rod 23b is connected on both sides by the upper arm 24b. The arms 24 a and 24 b can be moved by elevating jacks 25 a and 25 b mounted on the support cylinder 22. The lower arm 24a supported in this manner is mounted with a first grip device 26a that holds a segment S1 with a wide width, and the upper arm 24b is mounted with a second grip device 26b that holds a segment S2 with a narrow width. Yes.
[0027]
  Therefore, when the hydraulic motor 19 is driven and the drive gear 20 is rotationally driven, the drive gear 20 meshes with the inner teeth 17 to turn the turning ring 16, and the first grip device 26 a and the second grip device 26 b are moved.tunnelIt is possible to move in the circumferential direction along the inner peripheral surface. Further, when the elevating jack 25a or 25b is expanded or contracted at a predetermined position, the first grip device 26a or the second grip device 26b is moved through the arms 24a and 24b.tunnelIt is possible to move in the radial direction with respect to the inner peripheral surface of.
[0028]
  Since the first grip device 26a and the second grip device 26b have different widths of the segments S1 and S2 to be held, only the size of the guide frame and the mounting position of the vacuum pad, which will be described later, are different. Therefore, only the first grip device 26a will be described in detail below.
[0029]
  In the first grip device 26a, as shown in FIGS. 3 to 6, a box-shaped lifting platform 31 is fixed at the center of the lower arm 24a, and a slide rod 32 slides inside the lifting platform 31. A box 33 is movably fitted, and the slide box 33 can be moved by a slide jack 34. The guide frame 35 has substantially the same size and the same curved surface as that of the segment S1 so that the wide segment S1 can be held.
[0030]
  A support plate 36 protrudes from the lower left portion of the slide box 33, and a support plate 37 protrudes from the upper left portion of the guide frame 35. The support plates 36 and 37 include a rolling shaft 38 and a spherical bearing. 39 is connected. On the other hand, a support base 40 is formed on the lower right side of the slide box 33, and a rolling jack 41 is mounted on the upper left side of the guide frame 35. The tip of the driving rod of the rolling jack 41 is attached to the support base 40. It is connected. Further, pitching jacks 42 are respectively attached to the front and rear lower portions of the guide frame 35, and the tip ends of the drive rods of the pitching jacks 42 are connected to the support base 40.
[0031]
  Accordingly, the rolling of the guide frame 35 can be adjusted by extending / contracting the rolling jack 41, and the pitching of the guide frame 35 can be adjusted by expanding / contracting each pitching jack 42. it can.
[0032]
  A pad plate 43 having the same size as the guide frame 35 is fixed to the outer surface of the guide frame 35 by a bolt or the like (not shown). The pad plate 43 has vacuum pads 44a, which are divided into three in a predetermined shape. 44b and 44c are pasted. The pad plate 43 is formed with suction holes 45a, 45b, and 45c at locations surrounded by the vacuum pads 44a, 44b, and 44c, respectively. The suction holes 45a, 45b, and 45c have negative pressure generators. 51 (see FIG. 1) is connected.
[0033]
  Here, the piping from the negative pressure generator 51 to the suction holes 45a, 45b, 45c of the vacuum pads 44a, 44b, 44c will be described in detail. As shown in FIG. 7, each suction hole 45a, 45b, 45c is connected to one end of a pipe 52a, 52b, 52c, and the other end of the pipe 52a, 52b, 52c is passed through a filter 53a, 53b, 53c. It is connected to the electromagnetic valve 54 (54a, 54b, 54c). Each electromagnetic valve 54 (54a, 54b, 54c) is piped to the reservoir tank 56 via check valves 55a, 55b, 55. In addition, each piping 52a, 52b, 52c has vacuum pressure detectors 57a, 57b, 57c and pressure gauges 58a, 58b, 58c.Installed. On the other hand, the negative pressure generator 51 includes a vacuum pump 59 and its pump motor 60, and is connected to the reservoir tank 56 via check valves 61 and 62 and a filter 63. The reservoir tank 56 also has a vacuum pressure detector 64 and a pressure gauge 65.Installed.
[0034]
  Therefore, when the vacuum pump 59 is driven by the pump motor 60, the interior of the reservoir tank 56 is held at a predetermined vacuum pressure, and the electromagnetic valves 54a, 54b, 54c are operated with the guide frame 35 being in close contact with the segment S1. When opened, the vacuum pressure of the reservoir tank 56 passes through the pipes 52a, 52b, 52c, and is a room sealed by the pad plate 43, the vacuum pads 44a, 44b, 44c and the segment S1 through the suction holes 45a, 45b, 45c. The guide frame 35 can suck and hold the segment S1.
[0035]
  Further, as shown in FIGS. 3 and 4, a mounting base 46 is fixed in the center of the slide box 33 and the guide frame 35 so as to penetrate in the vertical direction. The main body of the safety jack 48 is movable. The tip of the drive rod of the safety jack 48 is connected to the upper portion of the mounting base 46, while a safety pin 49 is fixed to the lower end portion of the safety jack 48. A pair of position detectors 66a and 66b for detecting whether the safety jack 48 is expanded or contracted, that is, whether or not the safety pin 49 is fitted in the grout hole S1a of the segment S1, are attached to the mounting base 46.
[0036]
  Accordingly, when the drive rod of the safety jack 48 is extended with the guide frame 35 being in close contact with the segment S1, the safety pin 49 penetrates the pad plate 43 and protrudes downward to the grout hole S1a formed in the segment S1. Can be inserted. Here, the position detectors 66a and 66b can detect the insertion of the safety pin 49 into the grout hole S1a.
[0037]
  Further, the negative pressure generator 51, the electromagnetic valves 54 (54a, 54b, 54c) and the position detectors 66a, 66b described above are connected to a control device 67, and a grip provided on the support block 21 as a power source. Power units 50 such as devices 26a and 26b are connected. The control device 67 opens and closes the electromagnetic valve 54 (54a, 54b, 54c) based on the detection results of the position detectors 66a, 66b, the vacuum pressure detectors 57a, 57b, 57c, the pressure gauges 58a, 58b, 58c and the like. The negative pressure of the negative pressure generator 51 (reservoir tank 56) is set and applied to the vacuum pads 44a, 44b, 44c.
[0038]
  Although the first grip device 26a has been described above, the second grip device 26b has substantially the same structure as described above. However, as shown in FIGS. 1 and 2, the segment S2 to be held is S1. The width is narrower than that, and the size of the guide frame and the mounting position of the vacuum pad differ accordingly.
[0039]
  Here, the effect | action of the shield excavator of this embodiment mentioned above and the segment erector apparatus 10 with which this shield excavator was mounted | worn is demonstrated.
[0040]
  When excavating a tunnel, as shown in FIGS. 1 and 2, a plurality of shield jacks 13 are extended and the skin plate 11 is advanced by a reaction force against the existing segment S, while a cutter head (not shown) is rotated. Let the ground be excavated by a number of cutter bits. Next, any one of the shield jacks 13 is operated in the contracting direction to form a space with the existing segment S, and new segments S1 and S2 are attached to the space by the segment erector apparatus 10. Go.
[0041]
  That is, each segment S1, S2 is a cart not shown.tunnelThen, the operator operates the segment erector apparatus 10 to perform work. First, the hydraulic motor 19 is driven to turn the turning ring 16, and the first grip device 26a or the second grip device 26b is moved.tunnelThe first lifting device 26a or the second gripping device 26b is moved by expanding and contracting the lifting jack 25a or 25b.tunnelAre moved close to the segments S1 and S2 for positioning.
[0042]
  When the segment S1 is assembled by the first grip device 26a, the lifting jack 25a is extended, and the vacuum pads 44a of the pad plate 43 attached to the outer surface of the guide frame 35, as shown in FIGS. 44b and 44c are pressed against the inner peripheral surface of the segment S1. At this time, the rolling jack 41 is expanded and contracted to adjust the rolling of the guide frame 35, and the pitching jack 42 is expanded and contracted to adjust the pitching of the guide frame 35. In this state, first, the safety jack 48 is extended, the safety jack 48 main body is lowered along the guide cylinder 47, and the safety pin 49 is protruded downward to fit into the grout hole S1a of the segment S1. As a result, it is possible to prevent the segment S1 from being laterally displaced or dropped off due to a shearing force or the like acting on the segment S1. At this time, the position detectors 66 a and 66 b detect the insertion of the safety pin 49 into the grout hole S 1 a and output the detection result to the control device 67.
[0043]
  When the control device 67 confirms that the safety pin 49 is inserted into the grout hole S1a, the control device 67 then opens the electromagnetic valves 54a, 54b, 54c, and passes the vacuum pressure of the reservoir tank 56 through the pipes 52a, 52b, 52c, A negative pressure is applied to a chamber sealed by the pad plate 43, the vacuum pads 44a, 44b, 44c and the segment S1 through the suction holes 45a, 45b, 45c. As a result, the guide frame 35 sucks and holds the segment S1.
[0044]
  When the segment S1 is thus held by the guide frame 35 of the first grip device 26a, the lifting jack 25a is contracted to lift the segment S1. Then, again, the hydraulic motor 19 and the lifting jack 25a are driven, and the first grip device 26a is moved.tunnelAnd move the held segment S1 to a predetermined assembly position on the inner wall surface of the tunnel. Here, the segment S1 is fastened and fixed to the adjacent segment S by a fixing bolt (not shown). When the electromagnetic valve 54a, 54b, 54c is opened / closed to open the chamber sealed by the pad plate 43, the vacuum pads 44a, 44b, 44c and the segment S1, the guide frame 35 holds the segment S1 by suction. The safety jack 48 is contracted and the safety pin 49 is extracted from the grout hole S1a of the segment S1.
[0045]
  When the holding of the segment S1 by the guide frame 35 is released in this way, the hydraulic motor 19 and the lifting jack 25a are driven to move the first grip device 26a and return to the original position. A tunnel is constructed by repeating this process. The same operation is performed for the second grip device 26b.
[0046]
  By the way, if the vacuum pad 44c is damaged for some reason, for example, the detected value by the pressure gauge 58c is lowered, and the control device 67 receives this output and confirms the abnormality of the vacuum pad 44c. Therefore, the control device 67 closes the electromagnetic valve 54c and controls the negative pressure generator 51 so that the remaining vacuum pads 44a and 44b can hold the segment S1 by suction.
[0047]
【The invention's effect】
  As described above in detail with reference to the embodiment, according to the segment erector apparatus of the first aspect of the present invention, the guide frame having the plurality of vacuum pads for sucking and holding the segments is provided, and the control device includes a plurality of vacuum pads. When one of the detected pressure values drops, the negative pressure of the other vacuum padadjustAs a result, when the detected pressure value of one of the vacuum pads drops for some reason, the negative pressure of the other vacuum pad is reduced.adjustAs a result, the segments can be reliably held. As a result, the workability of the segment assembling work can be improved, and the safety of the work can be improved.
[0048]
  According to the segment erector apparatus of the second aspect of the present invention, since the position detector for detecting the fitting / removal of the safety pin to / from the holding hole of the segment is provided, the control device applies the negative pressure based on the detection result of the position detector.ActAs a result, the vacuum pad can reliably suck and hold the segment.
[0049]
  According to the segment erector device of the third aspect of the present invention, the safety pin that fits into the holding hole of the segment is provided on the guide frame that is mounted on the grip device, and the position at which the safety pin is fitted into and removed from the holding hole of the segment is detected. A detector is provided, and a vacuum pad capable of adsorbing and holding a segment is attached to the outer surface of the guide frame, and a negative pressure generator is connected to the vacuum pad, and the control device applies a negative pressure based on the detection result of the position detector. The negative pressure of the pressure generatorActSo that the safety pin can be securely inserted into the holding hole of the segment.By detectingThe grip device can reliably hold the segment, and as a result, the workability of the segment assembling work can be improved and the safety of the work can be improved.
[0050]
  According to the segment erector apparatus of the invention of claim 4, the vacuum pad is divided into a plurality of parts, each vacuum pad and the negative pressure generator are individually connected to the pipe, and an electromagnetic valve and a pressure detector are provided in each pipe. The control device reduces the negative pressure of the negative pressure generator based on the detection results of the position detector and pressure detector.adjustWhen the vacuum pad is damaged, the detection value of the pressure detector decreases, and the controller checks the vacuum pad for damage and closes the corresponding solenoid valve. Renew the negative pressure of the padadjustThus, the segment can be reliably held by the remaining vacuum pads.
[0051]
  According to the segment erector apparatus of the fifth aspect of the present invention, the support body is provided with a plurality of grip devices, and each of the plurality of grip devices can be posture-controlled with the shape of each guide frame set in accordance with a segment having a different shape.tunnelBecause the vacuum pad that can move and support along the front and rear direction of each guide frame and attach and hold the segment on the outer surface of each guide frame is attached, the guide frame suitable for the segment with different shape is brought close to the The segments can be reliably adsorbed and held.
[Brief description of the drawings]
FIG. 1 is a schematic side view of a segment erector apparatus according to an embodiment of the present invention mounted on a shield excavator.
FIG. 2 is a front view of a segment erector apparatus.
FIG. 3 is a cross-sectional view of a main part of the grip device.
4 is a cross-sectional view taken along the line IV-IV in FIG. 3;
FIG. 5 is a cross-sectional view taken along the line VV in FIG.
FIG. 6 is a layout view of a vacuum pad mounted on a guide frame.
FIG. 7 is a schematic view of negative pressure piping to a vacuum pad.
FIG. 8 is a schematic view of a conventional general shield excavator.
[Explanation of symbols]
  10-segment erector device
  11 Skin plate
  16 Rotating ring
  19 Hydraulic motor
  22 Support tube (support)
  25a, 25b Lifting jack
  26a First grip device
  26b Second grip device
  35 Guide frame
  44a, 44b, 44c Vacuum pad
  45a, 45b, 45c Suction hole
  48 Safety jack
  49 Safety pin
  50 power units
  51 Negative pressure generator
  52a, 52b, 52c Piping
  54, 54a, 54b, 54c Solenoid valve
  56 Reservoir tank
  57a, 57b, 57c Vacuum pressure detector
  58a, 58b, 58c Pressure gauge
  59 Vacuum pump
  66a, 66b position detector
  S1, S2 segment
  S1a grout hole (holding hole)

Claims (5)

A swivel ring that can swivel along the circumferential direction of the tunnel excavated at the rear of the tunnel excavator is provided, and the swivel ring is movable along the radial direction of the tunnel via a support that extends to the rear of the excavation direction. In a segment erector apparatus that is mounted on the inner wall surface of the tunnel while holding the segment carried into the tunnel by the grip apparatus and configured to match the shape of the segment A guide frame, a vacuum pad attached to the outer surface of the guide frame and capable of adsorbing and holding the segment, a negative pressure generator connected to the vacuum pad via a pressure detector, and the plurality When the detected pressure value of one of the vacuum pads drops, the negative pressure of the other vacuum pad Segment erector apparatus being characterized in that comprises a control device for integer. 2. The segment erector apparatus according to claim 1, wherein the safety pin is movably provided on the guide frame and is fitted into the holding hole of the segment to assist the holding of the segment, and the safety pin is fitted into the holding hole of the segment. A segment erector apparatus, comprising: a position detector for detecting disengagement. A swivel ring that can swivel along the circumferential direction of the tunnel excavated at the rear of the tunnel excavator is provided, and the swivel ring is movable along the radial direction of the tunnel via a support that extends to the rear of the excavation direction. In a segment erector apparatus that is mounted on the inner wall surface of the tunnel while holding the segment carried into the tunnel by the grip apparatus, the shape is set according to the shape of the segment. A guide frame, a safety pin that is movably provided on the guide frame and that fits into the holding hole of the segment to assist the holding of the segment, and detects whether the safety pin is inserted into or removed from the holding hole of the segment A position detector and a vacuum attached to the outer surface of the guide frame to hold the segment by suction. And Mupaddo segments Elekta characterized the negative pressure generator connected to the vacuum pads, that equipped with a control device for applying a negative pressure of the negative pressure generator based on a detection result of the position detector apparatus. 4. The segment erector apparatus according to claim 3, wherein the vacuum pad is divided into a plurality of parts, each vacuum pad and the negative pressure generator are individually connected to a pipe, and an electromagnetic valve and a pressure detector are provided in each pipe. The control device adjusts the negative pressure of the negative pressure generator based on the position detector and the detection result of the pressure detector, and opens and closes the solenoid valve. . 4. The segment erector apparatus according to claim 3, wherein the support body is provided with a plurality of grip devices, and each of the plurality of grip devices is capable of controlling the posture of each guide frame set in accordance with a segment having a different shape. A segment erector apparatus, characterized in that a vacuum pad that is supported so as to be movable in the front-rear direction of the tunnel and that can attract and hold the segment is mounted on the outer surface of each guide frame.

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