JP5843575B2 - Tunnel excavator and method for assembling / disassembling cutter drive unit in tunnel excavator - Google Patents

Description

  The present invention relates to a tunnel excavator having a cutter drive unit that can be easily assembled and disassembled, and a method for assembling and disassembling the cutter drive unit in the tunnel excavator.

  In general, a shield excavator has a disk-shaped cutter head rotatably mounted on a front portion of a cylindrical excavator body, and the cutter head is driven and rotated by a cutter drive unit, while the rear portion of the excavator body Is constructed by mounting a number of shield jacks for advancing the excavator body and an erector device for assembling segments on the inner wall surface of the existing tunnel.

  Therefore, when the shield jack is extended while the cutter head is rotated by the cutter driving unit, the excavator body moves forward by obtaining the reaction force from the existing segment, and the many cutter bits attached to the cutter head are moved forward. (Face) can be excavated to form a tunnel.

  When a tunnel is constructed in a predetermined construction section using such a shield excavator, a start shaft and a reaching shaft are excavated in advance in this construction section, a shield excavator is carried into the start shaft, and this start shaft is In the state where the excavation reaction force is secured in the inside, it penetrates into the natural ground from the starting point and excavates along a predetermined route. And if a shield excavator digs up to an arrival shaft, a shield excavator will be pulled out in an arrival shaft from the previously formed arrival port. In this way, a tunnel is constructed at a predetermined position.

  Then, the shield excavator drawn into the reaching shaft is dismantled and a part is collected on the ground, while the rest is buried in the ground as a tunnel structure. That is, in the shield excavator, first, the cutter head is divided into small portions by a gas cutter, and is lifted to the ground through a reach shaft by a crane. Next, the cutter driving part of the cutter head is similarly divided into small parts by a gas cutter, and is pulled up to the ground through a reach shaft by a crane. Finally, shield jacks, erector devices, soil removal devices (mud pipes, mud pipes, agitators, screw conveyors, etc.) are removed from the excavator body and lifted to the ground by a crane. Then, the remaining excavator body is buried as a part of the tunnel structure connected to the existing segment. It should be noted that the cutter head that has been divided and lifted to the ground and its driving device are scrapped.

Japanese Patent No. 3439745

  By the way, in recent years, due to the extension of the construction section that can be excavated by one tunnel excavator due to the extension of the cutter life in the cutter head, etc., the bearing (ring gear linked to the cutter drive motor) constituting the cutter drive unit of the cutter head There is a need to replace earth and sand seals (inner ring seal packing and outer ring seal packing in the intermediate ring support portion) in the middle of the construction section. On the other hand, because it is a short construction section, bearings and earth and sand seals may still be sufficiently usable. In such cases, bearings and earth and sand seals etc. are very expensive. Reuse is also desired in terms of cost.

  However, as shown in FIG. 7, the cutter driving unit of the conventional cutter head supports the bearing 102 attached to the intermediate ring 100 of the cutter head by the bearing mounting bolt 101 and the cutter driving motor 103 linked to the bearing 102. Since the bearing housing 104 is fixedly attached to the bulkhead 105 and the excavator main body 106 by welding or the like, the inner peripheral seal packing 107 and the outer peripheral seal packing 108 mounted on the bearing 102 and the intermediate ring 100 are replaced or re-installed. In order to use it, a large-scale disassembly work of the bearing housing 104 by a gas cutting machine or the like is required, and this has been very difficult particularly in a large-diameter shield excavator.

  Further, even if the bearing housing 104 is disassembled and the bearing 102 can be removed, the inner peripheral seal packing 107 and the outer peripheral seal packing 108 cannot be simply removed as they are thereafter. That is, when either one of the inner peripheral seal packing 107 or the outer peripheral seal packing 108 is removed as it is, the intermediate ring 100 is loosely fitted into the bulkhead 105 (the ring-shaped fitting hole 105a), and the intermediate ring 100 There is a possibility that the ring 100 is detached from the bulkhead 105 for each cutter head via the intermediate beam 109. This is because the thrust seal packing 110 in the intermediate beam mounting flange portion 109a is used particularly when the cutter drive unit is replaced in the middle of a construction section or when the cutter drive unit is reused in a state where it cannot be taken out from the front of the excavator. Since it does not function, it has a big problem that muddy water infiltrates from the part.

  Note that Patent Document 1 discloses a technology that uses a start shaft to collect an excavator for reuse in a state in which a reach shaft or the like cannot be excavated. However, this technology takes off the inner cylinder from the outer cylinder that constitutes the excavator body, and pulls the inner cylinder instead of pressing the propulsion jack against the reaction force receiving member as opposed to digging. It is moved to the shaft side, and after moving it, the cutter drive part will be dismantled from the inner trunk, and the dismantling work will still be large, and even if the cutter drive part can be reused, it can not be replaced was there.

  Therefore, an object of the present invention is to provide a tunnel excavator provided with a cutter drive unit that can be easily assembled and disassembled, and a method for assembling and disassembling the cutter drive unit in the tunnel excavator.

In order to achieve such an object, a tunnel excavator according to the present invention includes:
In a tunnel excavator provided with a cutter driving unit in which an intermediate beam of a cutter head is rotatably supported by a bearing via a thrust seal packing and an inner and outer peripheral seal packing with respect to a bulk head of an excavator body.
A bearing housing that supports the bearing and a cutter drive motor linked to the bearing can be attached to and detached from the bulkhead, and when the inner and outer seal packings are assembled and disassembled, the intermediate beam is alternately placed on the bulkhead. The first jig for the inner peripheral seal packing and the second jig for the outer peripheral seal packing, which are temporarily fixed to each other , are provided .

Also,
The temporary fixing bolts of the first jig for the inner seal packing and the second jig for the outer seal packing share at least the bolt holes of the bearing mounting bolts for attaching the bearing to the intermediate beam. Features.

Also,
In addition to the first jig for the inner peripheral seal packing and the second jig for the outer peripheral seal packing, the bulkhead incorporates a temporary fixing jack that holds the outer peripheral portion of the intermediate beam mounting flange portion in advance. It is characterized by that.

A method for assembling and disassembling a cutter drive unit in a tunnel excavator according to the present invention for achieving such an object,
When assembling and dismantling the cutter drive using the tunnel excavator,
Removing and attaching the bearing housing to the bulkhead;
The process of attaching and removing the bearing to the bulkhead,
A step of temporarily fixing the intermediate beam alternately to the bulkhead when the inner and outer seal packings are alternately mounted and removed; and
It is characterized by having.

  According to the tunnel excavator and the method of assembling / disassembling the cutter drive unit in the tunnel excavator according to the present invention, it is easy to assemble / disassemble the bearing and the inner / outer peripheral seal packing in the cutter drive unit from inside the machine while avoiding intrusion of muddy water. Can be done.

It is sectional drawing of the cutter drive part in the mud pressure type shield excavator which shows one Example of this invention. It is a disassembly process drawing of a bearing. It is a disassembly process diagram of the inner and outer peripheral seal packing. It is an assembly process figure of an inner and outer periphery seal packing. It is a whole block diagram of a mud pressure type shield excavator. It is a schematic diagram which shows arrangement | positioning of a jig | tool. It is sectional drawing of the conventional cutter drive part.

  Hereinafter, a tunnel excavator according to the present invention and a method for assembling / disassembling a cutter driving unit in the tunnel excavator will be described in detail with reference to the drawings.

  FIG. 1 is a sectional view of a cutter drive unit in a mud pressure shield excavator showing an embodiment of the present invention, FIG. 2 is a bearing disassembling process diagram, FIG. 3 is an inner and outer peripheral seal packing disassembling process diagram, and FIG. FIG. 5 is an overall configuration diagram of a mud pressure shield excavator, and FIG. 6 is a schematic diagram showing the arrangement of jigs.

  As shown in FIG. 5, a cutter head 13 is interposed between an intermediate beam 14 and an intermediate ring (cutter drum) 15 in a bulkhead 12 of a excavator body 10 that forms a cylindrical shape of a mud pressure shield excavator (tunnel excavator). The bearing 16 is rotatably mounted. This bearing 16 comprises a triaxial roller bearing with a ring gear that carries a triaxial load of thrust force, radial force and moment force among the loads acting on the cutter head 13.

  A plurality of cutter spokes 17 are fixed to the front surface of the cutter head 13 with a face plate (not shown) between them in a radial pattern from the center of rotation. A number of cutter bits 18 are attached to the cutter pork 17 and the face plate. A fishtail cutter 19 is attached to the center of rotation of the cutter head 13. Further, an appropriate number of copy cutters 20 are mounted on the cutter pork 17 and the face plate so that the cutter jacks 17 and the face plate can be expanded and contracted (invaded and retracted) in the radial direction of the cutter head 13.

  The ring gear 16a of the bearing 16 is engaged with a plurality of drive gears 22 of a cutter drive (turning) motor 21. Therefore, when the cutter drive motor 21 is operated to drive the drive gear 22 to rotate, the cutter head 13 is rotated via the ring gear portion 16 a of the bearing 16. The bearing 16 and the cutter drive motor 21 are supported by the bulkhead 12 and the excavator body 10 via a bearing housing 23. The bearing 16, the cutter driving motor 21, the intermediate ring 15 and the like constitute a cutter driving unit, and its specific mounting structure will be described later.

  A rotary joint 24 is assembled at the center of the bulkhead 12, and pressure oil is supplied and discharged from a hydraulic source (not shown) to the hydraulic jack 11 of the copy cutter 20 via the rotary joint 24. To be done.

  Further, a screw conveyor 25 is disposed inside the excavator body 10 so that the earth and sand excavated by the cutter head 13 can be discharged to the rear of the tunnel. In other words, the front end (outlet) of the screw conveyor 25 passes through the lower part of the bulkhead 12 and opens into the chamber chamber 26 defined by the cutter head 13 and the bulkhead 12, and the exhaust provided at the rear lower part. The exit (opened and closed by the gate 28 driven by the jack 27) faces a belt conveyor (not shown) arranged in the longitudinal direction in the tunnel. The screw conveyor 25 is configured such that screw wings 25c are mounted inside a cylindrical tube 25a that is disposed so as to incline rearward so as to be rotatable by a drive motor 25b.

  On the inner peripheral portion of the excavator main body 10, a propulsion jack 29 that can be expanded and contracted with respect to an existing segment S constructed (assembled) on the inner peripheral surface of the tunnel as a lining member is spaced apart at a predetermined interval in the circumferential direction. Many of them are arranged. Further, the rear end portion (skin plate) of the excavator body 10 is fitted to the outer periphery of the existing segment S via the tail seal 30. In addition, an erector 31 for assembling the segment S and a rear overhang base 32 are assembled to the rear part of the excavator main body 10, and a segment adjuster 33 for holding a perfect circle of the assembled segment S is provided on the rear overhang base 32. The

  As shown in FIG. 1, the cutter drive unit described above has an intermediate ring 15 in the ring-shaped fitting hole 35 of the bulkhead 12, an inner peripheral seal packing 40, an inner peripheral seal packing contact plate 41, an outer peripheral seal packing 42, and the like. The outer peripheral seal packing contact plate 43 is rotatably fitted. The fitting hole 35 is formed in a housing-like reinforcing wall portion 44 formed on the rear surface of the bulkhead 12.

  In the figure, 45 is an inner peripheral seal packing mounting bolt that is screwed into the rear end face of the intermediate ring 15, and 46 is an inner peripheral seal packing contact plate mounting bolt that is screwed into the intermediate ring inner peripheral side mounting portion 44 a of the reinforcing wall portion 44. Reference numeral 47 denotes an outer peripheral seal packing mounting bolt that is screwed into the rear end face of the intermediate ring 15, and 48 is an outer peripheral seal packing abutting plate mounting bolt that is screwed into the intermediate ring outer peripheral side mounting part 44 b of the reinforcing wall part 44.

  A thrust seal packing 49 is interposed between the intermediate beam mounting flange portion 14 a that is bolted to the front end surface of the intermediate ring 15 and the front surface of the bulkhead 12. The movable portion (ring gear portion 16a) of the bearing 16 is connected to the rear end surface of the intermediate ring 15 by the first bearing mounting bolt 50, while the fixed portion of the bearing 16 is connected to the bearing housing 23 by the second bearing mounting bolt 51. Connected.

  The bearing housing 23 is mounted on the inner peripheral side of the intermediate ring of the reinforcing wall portion 44 by the first bearing housing mounting bolt 54 in a state where the cutter driving motor 21 is mounted by the cutter driving motor mounting bolt 52 and the cutter driving motor mounting pin 53. 44a, and the second bearing housing mounting bolt 55 is connected to the intermediate ring outer peripheral side mounting portion 44b of the reinforcing wall portion 44. In the figure, reference numeral 56 denotes a welded portion of the bearing housing 23 to the excavator body 10 and this may not be particularly required.

  The aforementioned various bolts 45 to 48, 50, 52, 54, 55 and a plurality of pins 53 are provided in the circumferential direction. For example, as shown in the schematic diagram showing the arrangement of the jig shown in FIG. 6, the first jig is attached for attaching the first jig 60 for the inner seal packing used when assembling / disassembling the inner and outer seal packings 40,. Twelve first bearing mounting bolts 50 that share the screw holes of the second jig mounting bolt 61a for mounting the bolt 60a and the second jig 61 for the outer peripheral seal packing are provided in the circumferential direction equally, and the inner peripheral seal packing is also provided. Six first bearing housing mounting bolts 54 that share the screw holes of the first jig mounting bolts 60b for mounting the first jig 60 are provided in a circumferentially uniform manner. Further, six outer peripheral seal packing contact plate mounting bolts 48 that share the screw holes of the second jig mounting bolts 61b for mounting the second jig 61 for the outer peripheral seal packing are provided at equal intervals in the circumferential direction.

  Because of this configuration, when excavating with the mud pressure shield excavator, first, the cutter drive motor 21 is operated at the initial position (the state shown in FIG. 5) in which all the propulsion jacks 29 are retracted, and the cutter head 13 is moved. Rotate.

  Next, all or arbitrary propulsion jacks 29 are extended from the above state to propel the excavator body 10 by one stroke (advance). At this time, the propulsion reaction force is received by the existing segment S. As a result of this propulsion, a number of cutter bits 18 mounted on the cutter head 13 excavate the front ground. The excavated earth and sand are discharged from the chamber chamber 26 to the outside by the screw conveyor 25 or the like.

  Next, with the cutter head 13 stopped turning, the propulsion jack 29 is partially contracted sequentially to assemble the segment S by the erector 31 and the segment adjuster 33 and hold the true circle. Thereafter, the above-described steps are repeated to excavate and form a tunnel having a predetermined length.

  In this embodiment, the bearing 16 and the inner and outer peripheral seal packings 40 and 42 in the cutter driving unit described above can be assembled and disassembled from the machine as needed. When the inner and outer peripheral seal packings 40 and 42 are assembled and disassembled, the first and second jigs 60 and 61 for the inner and outer peripheral seal packings described above are used.

  Specifically, for example, when the bearing 16 is disassembled from the state of the cutter driving unit shown in FIG. 1, the cutter driving motor mounting bolt 52 and the cutter driving motor mounting pin 53 are removed and the cutter driving motor 21 is detached from the bearing housing 23. Then, the process proceeds to the step shown in FIG.

  That is, first, if there is a welded portion 56 between the bearing housing 23 and the excavator body 10, this is cut by a gas cutter, and then the second bearing mounting bolt 51, the first bearing housing mounting bolt 54, and the second bearing. The housing mounting bolt 55 is removed, and the bearing housing 23 is removed from the bearing 16 and the bulkhead 12 (the intermediate ring inner peripheral mounting portion 44a and the intermediate ring outer peripheral mounting portion 44b of the reinforcing wall portion 44) (see FIG. 2A). ).

  Next, when the first bearing mounting bolt 50 is removed and the bearing 16 is removed from the intermediate ring 15 (see FIG. 2B), the disassembly of the bearing 16 is completed (see FIG. 2C). It should be noted that when the bearing 16 is assembled, it is obvious that the bearing 16 is performed in the reverse manner of the above-described process, and thus detailed description thereof is omitted.

  When disassembling the inner and outer peripheral seal packings 40, 42, the process proceeds from the state shown in FIG. 2C to the step shown in FIG.

  First, the first jig 60 for inner peripheral seal packing for holding (temporarily fixing) the intermediate beam 14 (strictly, the intermediate ring 15) is a first jig mounting bolt (temporary fixing bolt) 60a, 60b. The intermediate ring 15 and the bulkhead 12 are attached to the intermediate ring inner peripheral side attachment portion 44a (see FIG. 3A).

  At this time, as shown in FIG. 6, the first jig mounting bolt 60a shares the bolt hole of the first bearing mounting bolt 50, and the first jig mounting bolt 60b uses the bolt hole of the first bearing housing mounting bolt 54. Sharing. In addition to the first jig 60 for inner peripheral seal packing and the second jig 61 for outer peripheral seal packing described later, a plurality of temporary fixing jacks 62 are built in the bulkhead 12 in advance. When disassembling the outer peripheral seal packings 40, 42, the temporarily fixing jack 62 may be extended to grip the outer peripheral portion of the intermediate beam mounting flange portion 14a.

  Next, after removing the outer peripheral seal packing mounting bolt 47 and removing the outer peripheral seal packing 42, the outer peripheral seal packing abutting plate mounting bolt 48 is removed and the outer peripheral seal packing abutting plate 43 is removed (see FIG. 3B).

  Next, the second jig 61 for outer peripheral seal packing for holding (temporarily fixing) the intermediate beam 14 (strictly, the intermediate ring 15) is replaced with second jig mounting bolts (temporary fixing bolts) 61a and 61b. After attaching the intermediate ring 15 and the intermediate ring outer peripheral side attachment portion 44b of the bulkhead 12, the first jig 60 for inner peripheral seal packing is removed. (See (c) of FIG. 3). At this time, as shown in FIG. 6, the second jig mounting bolt 61 a shares the bolt hole of the first bearing mounting bolt 50, and the second jig mounting bolt 61 b is the bolt hole of the outer peripheral seal packing backing plate mounting bolt 48. Share.

  Next, after removing the inner peripheral seal packing mounting bolt 45 and removing the inner peripheral seal packing 40, the inner peripheral seal packing abutting plate mounting bolt 46 is removed and the inner peripheral seal packing abutting plate 41 is removed (see (d) of FIG. )reference).

  Then, if the second jig 61 for outer peripheral seal packing is removed, the disassembly of the inner and outer peripheral seal packings 40 and 42 is completed (see FIG. 3 (e)). At this time, if the temporary fixing jack 62 described above is incorporated, it is contracted.

  On the other hand, when assembling the inner and outer peripheral seal packings 40, 42, the process proceeds from the state shown in FIG. 3E to the step shown in FIG.

  First, the second jig 61 for outer peripheral seal packing for holding (temporarily fixing) the intermediate beam 14 (strictly, the intermediate ring 15) is attached to the intermediate ring 15 and the bulkhead 12 by the second jig mounting bolts 61a and 61b. It attaches to the intermediate ring outer peripheral side attaching part 44b (refer (a) of FIG. 4).

  At this time, the second jig mounting bolt 61a shares the bolt hole of the first bearing mounting bolt 50, and the second jig mounting bolt 61b shares the bolt hole of the outer peripheral seal packing pad mounting bolt 48 as described above. It is as follows. In addition to the second jig 61 for outer peripheral seal packing and the first jig 60 for inner peripheral seal packing, which will be described later, a plurality of temporary fixing jacks 62 are built in the bulk head 12 in advance. As described above, when assembling the outer peripheral seal packings 40, 42, the temporary fixing jack 62 may be extended to grip the outer peripheral portion of the intermediate beam mounting flange portion 14a.

  Next, after the inner peripheral seal packing 40 is attached to the intermediate ring 15 with the inner peripheral seal packing mounting bolt 45, the inner peripheral seal packing abutting plate 41 is attached to the inner ring inner peripheral side mounting portion 44a. 46 (see FIG. 4B).

  Next, a first jig 60 for inner peripheral seal packing for holding (temporarily fixing) the intermediate beam 14 (strictly, the intermediate ring 15) is bulked with the intermediate ring 15 by the first jig mounting bolts 60a and 60b. After attaching to the intermediate ring inner peripheral side attachment portion 44a of the head 12, the second jig 61 for outer peripheral seal packing is removed (see FIG. 4C). At this time, as shown in FIG. 6, the first jig mounting bolt 60a shares the bolt hole of the first bearing mounting bolt 50, and the first jig mounting bolt 60b uses the bolt hole of the first bearing housing mounting bolt 54. Sharing.

  Next, after attaching the outer peripheral seal packing 42 to the intermediate ring 15 with the outer peripheral seal packing mounting bolt 47, the outer peripheral seal packing abutting plate 43 is attached to the inner peripheral inner side mounting portion of the bulkhead 12 with the outer peripheral seal packing abutting plate mounting bolt 48. 44a (see (d) of FIG. 4).

  Then, by removing the first jig 60 for the inner peripheral seal packing, the assembly of the inner and outer peripheral seal packings 40 and 42 is completed (see FIG. 4E). At this time, if the temporary fixing jack 62 described above is incorporated, it is contracted.

  Thus, according to the present embodiment, when assembling and disassembling the cutter driving portion of the excavator body 10, the first and second bearing housings 23 are placed against the reinforcing wall portion 44 of the bulkhead 12 with respect to the bearing housing 23. First, the bearing 16 can be easily assembled and disassembled from within the machine by attaching and detaching the mounting bolts 54 and 55. That is, the conventional large-scale disassembly work of the bearing housing by a gas cutting machine or the like is unnecessary, which is very advantageous in a large-diameter shield excavator.

  When assembling and disassembling the inner and outer seal packings 40 and 42, the first jig 60 for inner seal packing is in a state where the bearing housing 23 is detached from the reinforcing wall portion 44 of the bulkhead 12. And the second jig 61 for outer peripheral seal packing, the intermediate beam 14 (strictly, the intermediate ring 15) of the cutter head 13 is intermediately connected to the intermediate ring inner peripheral side mounting portion 44a in the reinforcing wall portion 44 of the bulkhead 12. Since the inner and outer peripheral seal packings 40 and 42 can be assembled and disassembled while temporarily fixed (gripped) alternately to the ring outer peripheral side mounting portion 44b, the operation can be performed easily and smoothly.

  That is, the function of the thrust seal packing 49 in the intermediate beam mounting flange portion 14a is maintained, so that muddy water can be prevented from entering the machine from the portion, and the intermediate ring can be used without the inner and outer peripheral seal packings 40 and 42. 15 is prevented from being detached from the ring-shaped fitting hole 35 of the bulkhead 12 together with the cutter head 13 via the intermediate beam 14, and a sufficient mounting space is ensured during assembly.

  When the intermediate beam 14 (strictly the intermediate ring 15) is temporarily fixed, the first jig mounting bolts 60a and 60b of the first jig 60 for the inner seal packing and the outer seal packing are used. The bolt holes of the second jig mounting bolts 61a and 61b of the second jig 61 are the first bearing mounting bolt 50 in the intermediate ring 15 and the first bearing housing mounting bolt 54 and the intermediate ring in the intermediate ring inner peripheral mounting portion 44a. Since it is shared with the bolt hole of the outer peripheral seal packing contact plate mounting bolt 48 in the outer peripheral side mounting portion 44b, the cost can be reduced by reducing the number of processes in the cutter driving portion, and the versatility of the cutter driving portion and the jig can be improved. . Further, by using the temporary fixing jack 62, the intermediate beam 14 (strictly, the intermediate ring 15) can be temporarily fixed (gripped) to the reinforcing wall portion 44 of the bulkhead 12 more firmly.

  In this way, the assembly and disassembly of the bearing 16 and the inner and outer peripheral seal packings 40 and 42 in the cutter drive unit can be easily performed from the inside of the machine while avoiding the intrusion of muddy water, and in particular, the cutter drive unit is replaced during the construction section. This is effective when the cutter drive unit is reused in a state where the cutter drive unit cannot be taken out from the front of the excavator.

  The present invention is not limited to the above-described embodiments, and various changes such as changes in the shape, number, and mounting position of the first and second jigs for the inner and outer seal packings are possible without departing from the scope of the present invention. It goes without saying that it is possible.

  The tunnel excavator according to the present invention can be applied not only to a mud pressure shield excavator but also to a mud shield excavator and a tunnel boring machine (TBM).

DESCRIPTION OF SYMBOLS 10 Excavator main body 11 Hydraulic jack 12 Bulkhead 13 Cutter head 14 Intermediate beam 14a Intermediate beam mounting flange 15 Intermediate ring (cutter drum)
16 Bearing 16a Ring gear 17 Cutter pork 18 Cutter bit 19 Fish tail cutter 20 Copy cutter 21 Cutter drive (turning) motor 22 Drive gear 23 Bearing housing 24 Rotary joint 25 Screw conveyor 26 Chamber chamber 27 Jack 28 Gate 29 Propulsion jack 30 Tail Seal 31 Elector 32 Rear overhang base 33 Segment adjuster 35 Fitting hole 40 Inner peripheral seal packing 41 Inner peripheral seal packing contact plate 42 Outer peripheral seal packing 43 Outer peripheral seal packing contact plate 44 Reinforcement wall portion 44a Intermediate ring inner peripheral side mounting portion 44b Intermediate Ring outer peripheral side mounting portion 45 Inner peripheral seal packing mounting bolt 46 Inner peripheral seal packing contact plate mounting bolt 47 Outer peripheral seal packing mounting bolt 48 Outer peripheral seal packing contact plate mounting Bolt 49 Thrust seal packing 50 First bearing mounting bolt 51 Second bearing mounting bolt 52 Cutter driving motor mounting bolt 53 Cutter driving motor mounting pin 54 First bearing housing mounting bolt 55 Second bearing housing mounting bolt 56 Bearing housing excavator body First jigs 60a and 60b for inner circumference seal packing First jig mounting bolt 61 Second jigs 61a and 61b for outer circumference seal packing Second jig mounting bolt 62 Temporary fixing jack S segment

Claims (4)

In a tunnel excavator provided with a cutter driving unit in which an intermediate beam of a cutter head is rotatably supported by a bearing via a thrust seal packing and an inner and outer peripheral seal packing with respect to a bulk head of an excavator body.
A bearing housing that supports the bearing and a cutter drive motor linked to the bearing can be attached to and detached from the bulkhead, and when the inner and outer seal packings are assembled and disassembled, the intermediate beam is alternately placed on the bulkhead. A tunnel excavator comprising a first jig for inner peripheral seal packing and a second jig for outer peripheral seal packing, which are temporarily fixed to each other .   The temporary fixing bolts of the first jig for the inner seal packing and the second jig for the outer seal packing share at least the bolt holes of the bearing mounting bolts for attaching the bearing to the intermediate beam. The tunnel excavator according to claim 1, wherein   In addition to the first jig for the inner peripheral seal packing and the second jig for the outer peripheral seal packing, the bulkhead incorporates a temporary fixing jack that holds the outer peripheral portion of the intermediate beam mounting flange portion in advance. The tunnel excavator according to claim 1 or 2, characterized in that. When assembling and disassembling the cutter drive unit using the tunnel excavator according to any one of claims 1 to 3,
Removing and attaching the bearing housing to the bulkhead;
The process of attaching and removing the bearing to the bulkhead,
A step of temporarily fixing the intermediate beam alternately to the bulkhead when the inner and outer seal packings are alternately mounted and removed; and
A method for assembling and disassembling a cutter drive unit in a tunnel excavator.

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