JP4956763B2 - Segment assembly equipment - Google Patents

Description

  The present invention relates to a segment assembling apparatus for assembling a segment in a ring shape inside a cylindrical shield frame forming an outer shell of a shield machine.

  The shield machine includes a cylindrical shield frame, a cutter disposed at the front of the shield frame, a soil removal device that takes in the earth and sand cut by the cutter into the rear of the partition wall, and a segment to the shield frame. A segment assembly device (elector) provided in the shield frame to assemble in a ring shape along the inner peripheral surface, and a plurality of attachments to the shield frame to advance the shield frame by taking a reaction force on the segment assembled in the ring shape And a shielded jack.

  Such shield machine extends the shield jack, presses the cutter against the face, cuts the face with the cutter, takes the excavated earth and sand behind the bulkhead in the shield frame by a soil removal device (screw conveyor, etc.) The frame is moved forward (excavated) according to the extension stroke of the shield jack, and after dredging, the shield jack is contracted to form a space between the existing segment and the shield jack, and the segment is assembled in a ring shape by an elector in that space. To build a tunnel.

  The erector is provided with a moving table that moves in the circumferential direction, the radial direction, and the axial direction of the tunnel in order to grip the segment and assemble the gripped segment into a ring shape. This moving platform is provided with a vacuum pad that sucks and holds the inner peripheral surface of the segment to be assembled, and it is inserted into a holding hole formed through the inner and outer peripheral surface at the center of the segment to assist in holding the segment. There is known an erector provided with a safety pin that is extendable and retractable (Patent Documents 1 and 2).

  According to this erector, the inner peripheral surface of the segment is sucked by the vacuum pad and the segment is held by inserting the safety pin into the holding hole of the segment. Therefore, the gripping hardware for gripping the segment is attached to the inner peripheral surface of the segment. In a general erector in which the gripping hardware is removed after the segment is assembled, the necessary gripping hardware is not required to be attached or detached, and the assembly of the segment can be speeded up and automated.

JP-A-9-189200 Japanese Patent Laid-Open No. 10-88990

  By the way, in the said erector, it is necessary to form the holding hole for inserting a safety pin so that it may penetrate the inner peripheral surface in a segment. For this reason, after assembling the segments into a ring shape, it is necessary to perform waterproofing work that closes the holding holes and prevents the ingress of groundwater, resulting in an increase in cost.

  In addition, since the portion where the holding hole is formed on the inner peripheral surface of the segment cannot be adsorbed by the vacuum pad, the shape of the vacuum pad must be made to avoid the holding hole, and the adsorption area is limited and the adsorption force is improved. Is limited, and the shape of the vacuum pad is complicated, resulting in an increase in cost.

  On the other hand, if the above-mentioned holding hole is not provided in the segment, the above-mentioned problems will not occur. However, in this case, the safety pin of the erector cannot be fitted into the holding hole of the segment, so the segment is adsorbed only with the vacuum pad. Will be retained. For this reason, there may occur a case where the segment is displaced with respect to the vacuum pad and hinders assembly of the segment.

  For example, if the vacuum pump operation is stopped due to a power failure or failure while the segment is sucked and held by the vacuum pad, the suction force of the vacuum pad will decrease, and the segment may shift from the vacuum pad. is there. This deviation is likely to occur when the segment adsorbed by the vacuum pad at the bottom of the tunnel is turned 90 degrees in the circumferential direction of the tunnel by the erector.

  Further, when the segment sucked by the vacuum pad is pressed and assembled to the existing segment, the sucked and held segment may be displaced from the vacuum pad due to a reaction force from the existing segment.

  The object of the present invention, which was created in view of the above circumstances, is that when a flat segment without a hole (the holding hole) is adsorbed by a vacuum pad on the inner peripheral surface of the segment, the segment is attached to the vacuum pad. It is an object of the present invention to provide a segment assembling apparatus that can be securely held and assembled to an existing segment without shifting.

In order to achieve the above object, the present invention provides a segment assembling apparatus for assembling a segment in a ring shape inside a cylindrical shield frame that forms the outer shell of a shield machine, and holds and holds the segment. In order to assemble the segments in a ring shape, a moving table that moves in the circumferential direction, radial direction, and axial direction of the tunnel, a vacuum pad that is provided on the moving table and sucks the inner peripheral surface of the segment to be assembled, and provided on the moving table And a convex portion engaging with a concave portion formed on the face side end surface of the segment adsorbed by the vacuum pad, the segment side of the segment adsorbed by the vacuum pad on the movable table A presser portion that comes into contact with the end face is provided .
The presser part may be made of a soft material.

  The convex portion may be provided on the movable table so as to be movable in the tunnel axis direction, and an actuator for moving the convex portion in the tunnel axis direction may be provided on the movable table.

  The pressing portion may be provided on the moving table so as to be movable in the tunnel axis direction, and an actuator for moving the pressing portion in the tunnel axis direction may be provided on the moving table.

  According to the segment assembling apparatus according to the present invention, when a flat segment without a hole on the inner peripheral surface of the segment is adsorbed by the vacuum pad, the segment is securely held without being displaced with respect to the vacuum pad. Can be assembled into segments.

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

  FIG. 1A shows a side sectional view of a segment assembling apparatus (hereinafter also referred to as an erector) according to this embodiment, and FIG. 1B shows a sectional view taken along the line Ib-Ib in FIG.

  The erector 1 assembles the segment 3 in a ring shape inside the cylindrical shield frame 2 that forms the outer shell of the shield machine, and rotates around the axis of the shield frame 2 in the tunnel circumferential direction. A frame 4; a suspension beam 5 provided on the revolving frame 4 so as to be movable in the tunnel radial direction; and a moving table 6 provided on the hanging beam 5 so as to be movable in the tunnel axis direction. 3 has a segment holding part 7 for holding and releasing 3.

  The swivel frame 4 is formed in an annular shape, and is rotatably supported by a support roller 9 that is pivotally supported by a ring girder 8 provided on the inner peripheral surface of the shield frame 2. The revolving frame 4 has a drive gear 10 at the front portion in the axial direction, and is driven to rotate by engaging a pinion of a motor (not shown) with the drive gear 10. The ring girder 8 is provided with a shield jack 11 that takes the reaction force of the segment 3 after being assembled in a ring shape and advances the shield frame 2.

  A pair of support frames 12 disposed at intervals of 180 degrees are provided at the rear part in the axial direction of the turning frame 4 so as to extend rearward in the axial direction. A suspension beam 5 is attached to the support frame 12 so as to be movable in the tunnel radial direction. The suspension beam 5 includes a guide column 13 inserted into a cylindrical guide tube mounted on each support frame 12 in parallel with the diameter direction of the shield frame 2, and a connecting portion 14 that connects ends of the guide columns 13 to each other. And is moved in the tunnel radial direction by a jack 15 interposed between the connecting portion 14 and the support frame 12.

  A movable table 6 is attached to the connecting portion 14 of the suspension beam 5 so as to be movable in the tunnel axis direction. The movable table 6 has a cylindrical guide tube 17 inserted through a pair of guide pillars 16 extending in the tunnel axis direction at a distance in the tunnel width direction at the connecting portion 14 of the suspension beam 5. It is moved in the tunnel axis direction by a jack (not shown) interposed between 17 and the guide column 16.

  As shown in FIG. 2 which is a partially enlarged view of FIG. 1A, FIG. 3 which is a sectional view taken along line III-III in FIG. 2, and FIG. 4 which is a sectional view taken along line IV-IV in FIG. The main body 18 is mainly composed of a base body 18 on which the guide cylinder 17 is formed, and a segment holding part 20 mounted on the base body 18 via a posture adjusting part 19. The segment holding unit 20 holds and releases the segment 3, and includes a holding unit main body 21 attached to the base body 18 via the posture adjusting unit 19, and a lower surface of the holding unit main body 21 (an outer surface in the tunnel radial direction). And a protrusion 25 (displacement) that engages with a recess 24 (displacement prevention hole) that is attached to the holding portion main body 21 so as to be movable in the tunnel axis direction and is formed on the face side end surface 23 of the segment 3. Prevention pin).

  The vacuum pad 22 is formed from a flexible material such as rubber in a ring shape (a low-cylindrical shape). The upper end of the vacuum pad 22 is fixed to the lower surface of the holding body 21 by adhesion or the like, and the lower end is the segment 3. It abuts on the upper surface (inner peripheral surface). With the lower end of the vacuum pad 22 in contact with the upper surface of the segment 3, the air inside the vacuum pad 22 is exhausted by the vacuum pump from the exhaust port formed on the lower surface of the holding body 21. ing. By this exhaust, the inside of the vacuum pad 22 becomes negative pressure, and the segment 3 is adsorbed.

  A pair of cylindrical guide cylinders 26 extending in the tunnel axis direction are provided in the holding body 21 at intervals in the tunnel width direction, and guide pillars 27 are slidable in the respective guide cylinders 26. It is inserted. The distal end portion (the front portion in the tunnel axial direction) of each guide column 27 is connected by a connection plate 28. The connection plate 28 has a length in the tunnel width direction that connects the distal end portions of the respective guide pillars 27, and opposes the end surface (face face side end surface 23) of the segment 3 adsorbed by the vacuum pad 22 in the tunnel axial direction. It has a height in the tunnel radial direction.

  In the center of the connecting plate 28 in the tunnel width direction, the protrusion (displacement prevention pin) 25 that engages with the recess (displacement prevention hole) 24 formed on the face side end surface 23 of the segment 3 adsorbed by the vacuum pad 22. Is provided. In this embodiment, the slip prevention pin 25 is formed in a truncated cone shape (a shape obtained by cutting off the top of the cone), and the slip prevention hole 24 is formed in a truncated cone shape accordingly. For example, the misalignment prevention pin 25 may be a cylindrical shape, the misalignment prevention hole 24 may be a circular hole, the misalignment prevention pin 25 may be a prismatic shape, and the misalignment prevention hole 24 may be a square hole.

  On both ends of the connecting plate 28 in the tunnel width direction, presser portions (displacement prevention plates) 29 that come into contact with the face side end surface 23 of the segment 3 attracted by the vacuum pad 22 sandwich the displacement prevention pin 25 in the middle. Each of them is arranged. The slip prevention plate 29 is made of a soft material such as resin or urethane rubber so as not to damage the segment 3. In this embodiment, the slip prevention plate 29 is disposed at a position overlapping the guide pillar 27 when viewed from the tunnel radial direction as shown in FIG. However, they may be arranged at positions where they do not overlap.

  An actuator (jack) 30 that moves the connection plate 28 in the tunnel axis direction is interposed between the connection plate 28 and the holding unit main body 21. The jack 30 moves the connecting plate 28 in the tunnel axis direction with respect to the holding portion main body 21 by expansion and contraction thereof, and the slip preventing pin 25 provided on the connecting plate 28 is attached to the vacuum pad 22 and the slip preventing hole 24 of the segment 3 is attached. In addition, the displacement prevention plate 29 provided on the connection plate 28 is brought into contact with and separated from the face side end surface of the segment 3 adsorbed on the vacuum pad 22. Since the jack 30 is placed on the upper surface (inner side surface in the tunnel radial direction) of the holding portion main body 21, it does not interfere with the shield jack 11. In the present embodiment, the jack 30 is disposed at a position that overlaps with the misalignment prevention pin 25 when viewed from the tunnel radial direction as shown in FIG. 3, but may be disposed at a position that does not overlap.

  The holding posture of the segment 3 held by the vacuum pad 22, the deviation preventing pin 25 and the deviation preventing plate 29 is adjusted by the attitude adjusting unit 19 shown in FIGS. The posture adjusting unit 19 is interposed between the base body 18 and the holding body 21 and suspends the holding body 21 from the base body 18 so as to be tiltable in all directions, and holds the base body 18. And four posture control jacks 32 that are spaced apart from each other in the tunnel width direction and the axial direction between the main body 21 and the amount of expansion / contraction of each posture control jack 32 to control the vacuum pad 22. The posture of the segment 3 held by the above is changed with respect to the base body 18.

  The above-described vacuum pad 22, misalignment prevention pin 25, and misalignment prevention plate 29 hold a segment 3 (so-called flat-plate segment, hereinafter also referred to as an inner peripheral plane segment) having a flat (smooth) inner peripheral surface. However, when tunnel digging in a tunnel, etc., a segment having irregularities on the inner circumferential surface rather than using an inner circumferential segment (so-called steel segment, ductile segment, etc., hereinafter also referred to as inner circumferential irregularity segment) ) May be required to construct a tunnel. Since the inner circumferential irregularity segment 3 cannot be adsorbed by the vacuum pad 22, it must be held by another segment holding part.

  Therefore, the segment assembling apparatus 1 according to the present embodiment has a configuration described below in order to hold the inner circumferential uneven segment 3.

  As shown in FIGS. 1A and 1B, another suspension beam 33 is attached to the support frame 12 so as to be movable in the tunnel radial direction. The suspension beam 33 includes a pair of guide columns 35 inserted through a cylindrical guide tube mounted on the support frame 12 in parallel with the diameter direction of the shield frame 2, and a connection for connecting ends of the guide columns 35 to each other. It is formed in a U-shape from the portion 36 and is moved in the tunnel radial direction by a jack 37 interposed between the connecting portion 36 and the support frame 12.

  A moving table 38 is attached to the connecting portion 36 of the suspension beam 33 so as to be movable in the tunnel axis direction. The moving table 38 is moved in the tunnel axis direction by a jack 39. The movable table 38 is provided with a segment gripping portion 40 for gripping the inner circumferential uneven segment 3. The segment gripping portion 40 includes a connecting portion 41 that is connected by a bolt or the like sandwiching a reinforcing rib formed on the inner peripheral surface of the inner circumferential uneven segment 3 from the tunnel axis direction, and sandwiching the connecting portion 41 from the tunnel width direction. A support jack 42 is provided for holding the segment 3 firmly by pressing the inner peripheral surface of the segment 3 disposed on both sides and connected to the connecting portion 41.

  The operation of this embodiment will be described.

  As shown in FIGS. 1A and 1B, when the inner peripheral plane segment 3 is held in the segment assembling apparatus 1 according to this embodiment, the inner peripheral plane segment 3 is temporarily placed on the bottom of the tunnel. Then, the rotary frame 4 is rotated in the tunnel circumferential direction, the suspension beam 5 is moved in the tunnel radial direction, and the moving table 6 is moved in the tunnel axis direction, so that the vacuum pad 22 provided on the moving table 6 is It is made to oppose the inner peripheral surface of the inner peripheral plane segment 3 temporarily placed.

  After making the vacuum pad 22 face the inner peripheral plane segment 3, the suspension beam 5 is moved outward in the tunnel radial direction so that the vacuum pad 22 is brought into contact with the inner peripheral surface of the inner peripheral plane segment 3 (lightly touched). The jack 30 is contracted to move the connecting plate 28 rearward in the tunnel axial direction (wellhead side), and as shown in FIGS. 2 and 4, the slip prevention pins 25 provided on the connecting plate 28 are disposed on the inner peripheral plane segment 3. The anti-slip plate 29 provided on the connecting plate 28 is pressed against the face side end surface 23 of the inner peripheral plane segment 3. Thereby, the position with respect to the holding | maintenance part main body 26 of the inner peripheral plane segment 3 is defined.

  When the jack 30 is contracted to engage the misalignment prevention pin 25 with the misalignment prevention hole 24, the misalignment prevention pin 25 is formed in a truncated cone shape, and the misalignment prevention hole 24 corresponds to the misalignment prevention pin 25. Since it is formed in a hole shape, even if the position of the displacement prevention pin 25 with respect to the displacement prevention hole 24 is shifted, the displacement prevention pin 25 is guided to the normal position. At this time, the connection plate 28 provided with the displacement prevention pin 25 and the holding portion main body 26 to which the connection plate 28 is attached are disposed on the inner peripheral plane segment 3 in which the displacement prevention hole 24 is formed (at this stage, temporarily placed on the bottom of the tunnel). Move relative). Therefore, before engaging the misalignment prevention pin 25 with the misalignment prevention hole 24, the base body 18 to which the holder main body 26 is attached is movable in the tunnel axis direction with respect to the suspension beam 5, and the suspension beam 5 is turned into the swivel frame. 4 is movable in the tunnel radial direction and the swivel frame 4 is rotatable in the tunnel circumferential direction, so that the holding body 26 is relatively moved with respect to the inner peripheral plane segment 3 temporarily placed on the bottom of the tunnel (three-dimensional Relative movement).

  Due to the contraction of the jack 30, the slip prevention pin 25 is engaged with the slip prevention hole 24, and the slip prevention plate 29 is brought into contact with the face side end surface 23 of the inner peripheral plane segment 3, and then the air inside the vacuum pad 22. Is evacuated by a vacuum pump to adsorb the inner peripheral plane segment 3 to the vacuum pad 22. As a result, the inner peripheral plane segment 3 is positioned and held by the vacuum pad 22, the displacement prevention pin 25 and the displacement prevention plate 29. After the holding, the suspension beam 5 is moved in the tunnel radial direction, the turning frame 4 is rotated in the tunnel circumferential direction, and the base body 18 of the moving base 6 is moved in the tunnel axial direction, whereby the vacuum pad 22 and the slip prevention pin 25 are moved. And the inner peripheral plane segment 3 held by the shift prevention plate 29 is moved to a desired assembly position, and is assembled to the existing segment 3 as shown in FIG.

  The inner peripheral plane segment 3 in the present embodiment is formed smoothly without a recess so that the inner peripheral surface 3a can be adsorbed soundly by the vacuum pad 22, and an engagement pin 44 is provided on the well end side end surface 43, An engagement hole 45 is formed in the side end face 23 and the misalignment prevention hole 24 is formed. A male cone portion 47 formed in a cone shape is provided on one end face 46 between pieces, and an end face 48 between the other pieces. A female cone portion 49 having a cone hole is provided. The inner peripheral plane segment 3 is moved in the axial direction after the one piece end face 46 is brought into contact with the end piece end face 48 of the existing segment 3 in the axial direction. Is engaged with the female cone portion 49 of the existing segment 3, and the engagement pin 44 is engaged with the engagement hole 45 of the existing segment 3, whereby assembly is achieved.

  When the inner peripheral plane segment 3 held by the vacuum pad 22 or the like is moved rearward in the tunnel axis direction (wellhead side) and pressed against the existing segment 3 for assembly, the held inner peripheral plane segment 3 is moved forward from the existing segment 3 in the tunnel axis direction. As shown in FIG. 4, this reaction force is displaced by the displacement of the connecting plate 28 in contact with the face side end face 23 of the inner peripheral plane segment 3 held by the vacuum pad 22. It is supported by the prevention pin 25 and the deviation prevention plate 29. Therefore, the held inner peripheral plane segment 3 can be pressed against the existing segment 3 on the wellhead side with a predetermined appropriate force without being displaced with respect to the vacuum pad 22.

  By the way, when the operation of the vacuum pump is stopped due to, for example, a power failure or failure in the state where the segment 3 is sucked and held by the vacuum pad 22, the suction force of the vacuum pad 22 is reduced. That is, while a check valve for holding the suction force of the vacuum pad 22 is provided in the exhaust path between the vacuum pad 22 and the vacuum pump or inside the vacuum pump, while the segment 3 is held, When the vacuum pump that should be normally operated stops due to a power failure or the like, the negative pressure is gradually released from the check valve and the edge of the vacuum pad 22, so that the suction force of the vacuum pad 22 decreases.

  In this embodiment, even if the vacuum pump operation is stopped due to a power failure, failure, etc., and the suction force of the vacuum pad 22 is reduced, in this embodiment, the displacement prevention pin 25 is engaged with the displacement prevention hole 24 to hold the segment 3. Therefore, the segment 3 is prevented from being displaced from the vacuum pad 22 or falling off the vacuum pad 22.

  Specifically, when the operation of the vacuum pump is stopped due to a power failure or the like, and the segment 3 adsorbed by the vacuum pad 22 at the bottom of the tunnel is turned 90 degrees in the circumferential direction of the tunnel by the rotation of the turning frame 4, Since shearing force acts on the adsorption surface between the segment 3 and the vacuum pad 22, the segment 3 is most likely to be displaced and dropped. However, referring to FIG. 4, the segment 3 in a state of being turned 90 degrees and standing. When the suction force of the vacuum pad 22 is reduced, the rotation of the vacuum pad 22 is rotated about the slip prevention pin 25 to cause slippage, so that the lower portion of the face side end face 23 of the segment 3 is located below the slip prevention pin 25. Since the segment 3 is prevented from rotating by being pressed against the plate 29, the segment 3 is prevented from being displaced and dropped.

  Further, when the circumferential turning angle of the segment 3 from the bottom of the tunnel is less than 90 degrees, the shearing force generated on the suction surface between the segment 3 and the vacuum pad 22 is smaller than that when swung 90 degrees, Compared to the case of 90 degrees, segment 3 is difficult to shift and difficult to drop off. Further, when the circumferential turning angle of the segment 3 from the bottom of the tunnel exceeds 90 degrees, a part of the weight of the segment 3 is placed on the vacuum pad 22 (when the turning movement is performed 180 degrees, the segment 3 Therefore, the segment 3 is less likely to be displaced and difficult to drop off than when it is 90 degrees.

  As described above, in this embodiment, the suction prevention of the segment 3 by the vacuum pad 22 is assisted by the slip prevention pin 25 and the slip prevention plate 29 using the face side end surface 23 of the segment 3, and therefore the inner peripheral surface of the segment 3. It is not necessary to form a holding hole for inserting a safety pin (see Patent Documents 1 and 2).

  Therefore, after assembling the segment 3 (after the primary lining), the waterproof construction (secondary lining) for closing the holding hole becomes unnecessary, and the cost can be reduced. Further, the shape of the vacuum pad 22 does not have to be a shape avoiding the holding hole, the suction area of the vacuum pad 22 is not limited by the holding hole, and the improvement of the suction force of the vacuum pad 22 is limited by the holding hole. Never happen. Moreover, it is not necessary to make the shape of the vacuum pad 22 complicated by avoiding the holding hole, leading to cost reduction.

  That is, according to the segment assembling apparatus 1 according to the present embodiment, when the flat segment 3 having no hole (holding hole) on the inner peripheral surface of the segment 3 is adsorbed by the vacuum pad 22, the segment 3 is attached to the vacuum pad. It can be held soundly without shifting with respect to 22, and can be assembled to the existing segment 3 accurately.

  The present invention is not limited to the above embodiment.

For example, the connection plate 28 provided with the convex portion (displacement prevention pin) 25 and the pressing portion (displacement prevention plate) 29 shown in FIGS. 2 to 4 may be fixed to the holding portion main body 21. In this case, the base body 18 to which the holding part main body 21 is attached is moved in the tunnel axis direction so that the convex part 25 and the pressing part 29 are brought into contact with the face side end face 23 of the segment 3. Further, the convex portion 25 and the presser portion 29 may be separately movable in the tunnel axis direction, and may be separately moved by an actuator (jack) . Also, as shown in FIG. 6, the convex portion 25 and two, the pressing portions 29 may be one.

  Further, the protrusion 25 (displacement prevention pin 25) of the erector 1 is not limited to that inserted into the recess 24 (displacement prevention hole 24) formed in the face side end surface 23 of the segment 3, as shown in FIG. In order to determine the positions of the segments 3 adjacent to each other in the tunnel axis direction, the alignment pins provided on the well end side end surface 43 of the segment 3 (for example, the same as the engagement pin 44) are inserted. 3 may be inserted into a centering hole (for example, the same as the engagement hole 45) formed in the face face end face 23. Further, the convex portion 25 (displacement prevention pin 25) is inserted into a bolt joint concave portion formed on the face side end surface 23 of the segment 3 in order to accommodate a bolt connecting the segments 3 adjacent to each other in the tunnel axis direction. It may be a thing.

  Further, as shown in FIG. 5, the segment 3 that is sucked and held by the vacuum pad 22 may have a flat shape on the inner peripheral surface, but a part of the inner peripheral surface (the vacuum pad 22 is applied). Only the contact portion) may be flat without unevenness.

It is explanatory drawing of the segment assembly apparatus which concerns on one Embodiment of this invention, (a) is a sectional side view of a segment assembly apparatus, (b) is the Ib-Ib sectional view taken on the line of Fig.1 (a). It is the elements on larger scale of Fig.1 (a). It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. It is explanatory drawing which shows the mode of the assembly of the segment by the said segment assembly apparatus. It is explanatory drawing which shows the deformation | transformation embodiment of this invention.

Explanation of symbols

1 Segment assembly equipment (Electa)
2 Shield frame 3 Segment 6 Moving table 22 Vacuum pad 23 Face side end face 24 Concave 25 Convex 29 Presser 30 Actuator (jack)

Claims (4)

A segment assembly device for assembling segments in a ring shape inside a cylindrical shield frame that forms the outer shell of a shield machine,
In order to hold the segment and assemble the held segment in a ring shape, a moving table that moves in the circumferential direction, radial direction, and axial direction of the tunnel;
A vacuum pad that is provided on the moving table and sucks the inner peripheral surface of the segment to be assembled; and a convex part that is provided on the moving table and engages with a recess formed on the face side end surface of the segment that is sucked by the vacuum pad In a segment assembly device comprising
A segment assembling apparatus according to claim 1, wherein a holding portion is provided on the movable table so as to be in contact with a face side end face of the segment adsorbed by the vacuum pad . The segment assembly device according to claim 1, wherein the presser portion is made of a soft material. The convex portion is provided on the movable table so as to be movable in the tunnel axis direction,
To the mobile base, the segment assembly device according to claim 1 or 2 is provided an actuator for moving the projection portion to the tunnel axis. The presser part is provided on the movable table so as to be movable in the tunnel axis direction,
The segment assembling apparatus according to any one of claims 1 to 3, wherein an actuator for moving the presser portion in a tunnel axis direction is provided on the moving table.

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