JP4956764B2 - 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, the holding of the segment using the above-described vacuum pad is performed by a segment having a smooth portion (a portion on which the vacuum pad is abutted) having no unevenness on the inner peripheral surface (a so-called flat plate segment or the like, hereinafter referred to as an inner peripheral plane segment). Otherwise, it can't be done. For segments with an uneven inner peripheral surface (so-called steel segments, ductile segments, etc., hereinafter also referred to as inner peripheral uneven segments), the vacuum pad's negative pressure escapes from the uneven portions on the inner peripheral surface. It cannot be absorbed and retained.

  However, when the tunnel depth is increased when the tunnel is dug, when using two or more tunnels for branching or connecting, the inner circumferential uneven segment is used instead of the inner circumferential plane segment. There are cases where it is necessary to build a tunnel. For example, when digging a curve, it is necessary to use a taper segment with a taper angle set according to the curve plan line. This taper segment is separate from the inner peripheral plane segment, which is a standard product used for straight digging. It is manufactured individually as a steel segment according to the curvature. Further, when the digging depth becomes deeper, since the earth pressure water pressure increases, it is necessary to use a ductile segment having a higher strength instead of the standard inner peripheral plane segment. In addition, when two or more tunnels are branched and connected, it is necessary to use a ductile segment or the like having higher rigidity than a normal inner peripheral plane segment at the opening of the tunnel to be branched and connected.

  An object of the present invention created in view of the above circumstances is to provide a segment assembling apparatus that can be assembled in a ring shape while holding an inner peripheral plane segment and can also be assembled in a ring shape by holding an inner peripheral uneven segment. There is.

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 the inner peripheral surface has no irregularities. A first moving table that moves in the circumferential direction, radial direction, and axial direction of the tunnel in order to assemble the held segment in a ring shape, It has a segment gripping part for gripping the inner peripheral concave / convex segment having concaves and convexes on the inner peripheral surface, and moves in the circumferential direction, radial direction and axial direction of the tunnel to assemble the gripped inner peripheral concave / convex segment into a ring shape. and a second movable stage, the first moving table is one having a pressing portion which is brought into contact with the working face side end face of the segments adsorbed by the vacuum pad That.
The presser part may be made of a soft material.

  An annular swivel frame that rotates in the circumferential direction of the shield frame, a first suspension beam mounted on the swivel frame so as to be movable in a radial direction of the shield frame, and the swivel frame facing the first suspension beam. A second suspension beam mounted so as to be movable in the radial direction of the shield frame. The first suspension base is provided with the first suspension base, and the second suspension base is provided with the second suspension base. It may be provided.

  The first moving table may have a convex portion that engages with a concave portion formed on a face side end surface of the inner peripheral plane segment adsorbed by the vacuum pad.

  According to the segment assembling apparatus according to the present invention, the inner peripheral plane segment can be held and assembled into a ring shape, and the inner peripheral uneven segment can also be held and assembled into a ring shape.

  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 segments 3 in a ring shape inside the cylindrical shield frame 2 that forms the outer shell of the shield machine, and the erector 1 according to the present embodiment has no unevenness on the inner peripheral surface. A segment 3 having a portion (inner peripheral plane segment 3 (see FIG. 5)), a first moving table 6 having a vacuum pad 22 for adsorbing and holding the portion without the unevenness, and an inner surface having unevenness And a second moving table 38 having a segment gripping portion 40 for gripping the circumferential uneven segment 3x (see FIG. 7). Both the first moving table 6 and the second moving table 38 move in the circumferential direction, radial direction and axial direction of the tunnel (shield frame 2) in order to assemble the held segments 3 and 3x in a ring shape. It has become.

  The erector 1 includes a revolving frame 4 that rotates in the tunnel circumferential direction about the axis of the shield frame 2, a first suspension beam 5 that is provided on the revolving frame 4 so as to be movable in the radial direction of the shield frame 2, and a revolving frame 4 has a second suspension beam 33 mounted so as to be movable in the radial direction of the shield frame 2 so as to face the first suspension beam 5. The first moving beam 6 is mounted on the first suspension beam 5 so as to be movable in the axial direction of the shield frame 2. The second moving beam 38 is mounted on the first hanging beam 33 in the axial direction of the shield frame 2. It is mounted so that it can move. The first moving base 6 has a vacuum pad 22 for attracting and holding the inner peripheral plane segment 3, and the second moving base 38 has a segment gripping part 40 for gripping the inner peripheral uneven segment 3 x. .

  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 first suspension beam 5 is attached to the support frame 12 so as to be movable in the tunnel radial direction. The first suspension beam 5 includes a guide column 13 inserted through a cylindrical guide tube mounted on each support frame 12 in parallel with the diameter direction of the shield frame 2, and a connection for connecting ends of the guide columns 13 to each other. It is formed in a U shape from the portion 14 and is moved in the tunnel radial direction by a jack 15 interposed between the connecting portion 14 and the support frame 12.

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

  2 is a partially enlarged view of FIG. 1A, FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. 4 is a sectional view taken along line IV-IV of FIG. 6 is mainly composed of a base body 18 on which the guide cylinder 17 is formed, and a segment holding part 20 attached to 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 vacuum pad 22, the displacement prevention pin 25, and the displacement prevention plate 29 described above are a segment 3 having a flat (smooth) portion with no irregularities on the inner peripheral surface (so-called flat plate segment or the like, hereinafter also referred to as an inner peripheral flat segment). However, when tunnel digging, etc., the inner circumferential plane segment 3 is not used, but a segment having an irregularity on the inner circumferential surface as shown in FIG. 7 (so-called steel segment, ductile) There are cases where it is necessary to construct a tunnel using 3a (segment, etc., hereinafter also referred to as an inner peripheral uneven segment).

  As shown in FIG. 7, the inner circumferential uneven segment 3x is formed in the thickness direction of the inner circumferential uneven segment 3x provided on the skin plate 50 formed in an arc shape and the edge of the skin plate 50 in the tunnel axis direction. The main girder 51, the joint plate 52 provided at the edge of the skin plate 50 in the circumferential direction of the tunnel and formed in the thickness direction of the inner circumferential uneven segment 3 x, and the front and rear main girder 51 are connected to the skin plate 50. The vertical ribs 53 provided on the skin plate 50 and the suspension metal fittings 54 provided on the skin plate 50 are provided. An engagement hole 55 is formed in the hanging metal fitting 54. Since the inner peripheral uneven segment 3x cannot be adsorbed by the vacuum pad 22, it must be held by another segment holding portion.

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

  As shown in FIGS. 1 (a) and 1 (b), the support frame 12 has a second suspension beam 33 in the radial direction of the shield frame 2 (tunnel radial direction) so as to face the first suspension beam 5. ) Is movably mounted. The second suspension beam 33 connects a pair of guide columns 35 inserted into a cylindrical guide tube mounted on the support frame 12 in parallel with the diameter direction of the shield frame 2 and ends of the guide columns 35. The connecting portion 36 is formed in a U shape and is moved in the tunnel radial direction by a jack 37 interposed between the connecting portion 36 and the support frame 12.

  A second moving table 38 is attached to the connecting portion 36 of the second suspension beam 33 so as to be movable in the axial direction (tunnel axis direction) of the shield frame 2. The second moving table 38 is connected to the tunnel axis by a jack 39. Moved in the direction. The 2nd movable stand 38 has the segment holding part 40 for holding the inner periphery uneven | corrugated segment 3x. The segment gripping portion 40 includes a connecting portion 41 that is connected to the engagement hole 55 by a bolt or the like sandwiching the hanging metal fitting 54 of the inner circumferential uneven segment 3x shown in FIG. A support jack 42 is provided for firmly holding the segment 3x by pressing the inner peripheral surface of the segment 3x that is disposed on both sides of the segment 3x and is connected to the connecting portion 41 across the direction.

  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. The rotary frame 4 is rotated in the tunnel circumferential direction, the first suspension beam 5 is moved in the tunnel radial direction, and the first moving table 6 is moved in the tunnel axis direction, whereby the vacuum mounted on the first moving table 6 The pad 22 is made to oppose the inner peripheral surface of the inner peripheral plane segment 3 temporarily placed on the bottom of the tunnel.

  After making the vacuum pad 22 face the inner peripheral plane segment 3, the first suspension beam 5 is moved outward in the tunnel radial direction to place the vacuum pad 22 on the inner peripheral surface of the inner peripheral plane segment 3. Contacting (lightly touching) and contracting the jack 30 moves the connecting plate 28 rearward in the tunnel axial direction (wellhead side), and prevents the displacement provided on the connecting plate 28 as shown in FIGS. The pin 25 is engaged with the slip prevention hole 24 formed in the face side end surface 23 of the inner peripheral plane segment 3, and the slip prevention plate 29 provided on the connection 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 the slip prevention pin 25 is engaged with the slip prevention hole 24, the base body 18 to which the holding portion body 26 is attached is movable in the tunnel axis direction with respect to the first suspension beam 5, and the first suspension beam 5 is movable in the tunnel radial direction with respect to the revolving frame 4, and the revolving frame 4 is rotatable in the circumferential direction of the tunnel, so that the holding portion body 26 is relative to the inner peripheral plane segment 3 temporarily placed at the bottom of the tunnel. Allow movement (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 holding, the vacuum pad 22, by moving the first suspension beam 5 in the tunnel radial direction, rotating the swivel frame 4 in the tunnel circumferential direction, and moving the base body 18 of the first moving base 6 in the tunnel axial direction, The inner peripheral plane segment 3 held by the misalignment prevention pin 25 and the misalignment 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.

  Further, at the time of curve excavation or the like, as described above, it is necessary to assemble the inner surface unevenness segment 3x shown in FIG. 7, but in this case, in the erector 1 according to the present embodiment, FIG. The inner surface uneven segment 3x can be gripped and assembled in a ring shape by the segment gripping portion 40 provided in the second moving table 38 shown in FIG. 1 (b).

  The second moving table 38 and the second suspension beam 33 on which the second moving table 38 is mounted are separated from the first moving table 6 and the first hanging beam 5 on which the second moving table 6 is mounted by 180 degrees in the circumferential direction of the revolving frame 4. Since they are arranged to face each other, they function as balance weights (counter weights) for the first moving table 6 and the first suspension beam 5 and contribute to stable rotation of the revolving frame 4.

  Further, since the moment of inertia around the axis of the swivel frame 4 can be adjusted by adjusting the amount of movement of the second suspension beam 33 in the tunnel radial direction, for example, the first suspension base 5 of the first suspension beam 5 has a normal size. When the key segment 3y (inner peripheral plane segment, see FIG. 1) which is smaller and lighter than the inner peripheral plane segment 3 is held, the second suspension beam 33 is drawn inwardly in the tunnel radial direction so as to take balance. May be.

  Thus, according to the segment assembling apparatus according to the present embodiment, the inner peripheral flat segment 3 (flat plate segment, concrete segment, etc.) is held and assembled into a ring shape, and the inner peripheral uneven segment 3x (steel segment, It can also be gripped and assembled into a ring shape.

  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 second suspension beam 33 shown in FIGS. 1 (a) and 1 (b) is omitted, and as shown in FIGS. 8 (a) and 8 (b), the guide pillar 13 of the first suspension beam 5 is removed. The second moving table 38 may be mounted via the connecting portion 36 at the end opposite to the side on which the first moving table 6 is mounted. By doing so, the number of parts can be reduced, and cost reduction can be promoted.

  Similarly, the second suspension beam 33 is omitted, and as shown in FIG. 9, the first moving table 6 and the second moving table 38 are connected to the connecting portion 14 of the first hanging beam 5 in the circumferential direction of the revolving frame 4. May be arranged side by side at intervals. In this case as well, the cost reduction can be promoted because the number of parts is reduced.

  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 modification of the convex part of the said segment assembly apparatus. It is a perspective view of an inner peripheral surface uneven | corrugated segment. It is explanatory drawing of the segment assembly apparatus which concerns on deformation | transformation embodiment of this invention, (a) is a sectional side view of a segment assembly apparatus, (b) is the VIIIb-VIIIb sectional view taken on the line of Fig.8 (a). FIG. 6 is a cross-sectional view of a segment assembly device according to another modified embodiment of the present invention.

Explanation of symbols

1 Segment assembly equipment (Electa)
2 Shield frame 3 segment (inner peripheral plane segment)
3x segment (inner rugged segment)
DESCRIPTION OF SYMBOLS 4 Rotating frame 5 1st hanging beam 6 1st moving stand 22 Vacuum pad 23 Face face side end surface 24 Concave 25 Convex 29 Pressing part 33 2nd hanging beam 38 2nd moving stand 40 Segment grip

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,
A vacuum pad for adsorbing and holding a segment having an uneven portion on the inner peripheral surface, and holding the segment, and assembling the held segment in a ring shape, in the circumferential direction, radial direction and axial direction of the tunnel A first moving table that moves;
It has a segment gripping part for gripping the inner peripheral concave / convex segment having concaves and convexes on the inner peripheral surface, and moves in the circumferential direction, radial direction and axial direction of the tunnel to assemble the gripped inner peripheral concave / convex segment into a ring shape. With two mobile platforms ,
The segment assembly apparatus according to claim 1, wherein the first moving base has a pressing portion that comes into 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. An annular swivel frame that rotates in the circumferential direction of the shield frame;
A first suspension beam mounted on the swivel frame so as to be movable in the radial direction of the shield frame;
A second suspension beam mounted on the swivel frame so as to be movable in the radial direction of the shield frame so as to face the first suspension beam;
Providing the first moving stand on the first suspension beam;
The segment assembly device according to claim 1 or 2 said second moving table is provided on the second suspension beam. The segment assembly apparatus according to any one of claims 1 to 3, wherein the first moving base has a convex portion that engages with a concave portion formed on a face side end face of the segment adsorbed by the vacuum pad.

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