JPH0647916B2 - Segment feeder for shield machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a device for supplying a segment to an erector device in a shield machine, and particularly to a case where a pair of erector devices are provided. The present invention relates to a segment feeder for a shield machine that can effectively feed segments to each.

"Prior art" A suitable shield construction method used for soft ground is to excavate the ground with a cutter device provided on the front surface of a shield machine with an outer cylindrical shape, and to make the cylinder circumferential and lengthwise. A lining body of a shape divided into a predetermined number, that is, the segments are assembled into a cylindrical shape inside the shield machine using an erector device, and a reaction force is applied to the front end of the assembled segment,
This is a method of constructing a tunnel by propelling the entire shield machine forward using the shield jack inside the shield machine and repeating these steps in sequence. In this case, the conventional shield machine is equipped with only one erector device, and therefore, the construction period of the segment assembly process tends to be prolonged with the recent increase in the diameter of the tunnel. Therefore, in recent years, a pair of erector devices (two) have been installed in the shield machine.
Equipped with one of the erector devices, while the process of gripping the supplied segment is performed, the other erector device assembles the segment at a predetermined position on the inner surface of the tunnel, shortening the overall construction period of the segment assembly process. Is being considered.

[Problems to be Solved by the Invention] However, even with a shield machine equipped with two conventionally-selected erector devices, an erector similar to a conventional shield machine equipped with one erector device is used. Since there is only one segment supply position to the device, it is difficult to shorten the construction period by the above-mentioned process, and there remains a problem for practical application.

That is, as shown in FIG. 9, when the segment 2 is supplied to the inside of the shield machine 1, the segment 2 is connected to the shield machine 1.
It is supplied to the segment supply position 4 provided at one lower portion in a horizontally long state in the same direction as the assembling direction. Therefore, the width of the supplied segment 2 is an obstacle, and the segments 2 and 2 to be assembled immediately below the segment 2 (the hatched portion in FIG. 9) are pre-assembled by either one of the erector devices 3. I have to keep it. Therefore, the segments 2, 2, ...
(One ring is composed of individual segments 2, 2, ...) Alternating as a whole assembling process
The number of steps in which 3 can be used is low, and therefore, the merit of shortening the construction period by equipping two erector devices 3 and 3 cannot be obtained so much. This is a phenomenon that occurs because the segments 2, 2, ... Having the same radius of curvature as the inner surface of the shield machine 1 must be supplied inside the shield machine 1. Moreover, the respective erector devices 3 and 3 are subject to time restrictions due to the work of the other erector devices 3 in order to avoid interference between the erector devices 3 and 3, which is also a factor that impedes shortening of the construction period. Was becoming.

In particular, when an automatic segment assembly robot, which has been introduced for the purpose of shortening the construction period in recent years, is adopted, the assembly robot is equipped with a bolt joining device between the segments 2, 2, ... However, the planar dimension thereof is further increased, so that the number of the segments 2, 2, ... To be preassembled is inevitably increased.

The present invention has been made in view of the above circumstances. In a shield machine equipped with a pair of erector devices, segment supply positions corresponding to the respective erector devices are provided, and segments are independently supplied to these segment supply positions. Therefore, it is an object of the present invention to provide a segment supply device for a shield machine that can effectively utilize the two erected devices and can shorten the construction period of the segment assembly process.

[Means for Solving the Problems] In order to solve the above problems, the present invention relates to a cutter device that is provided in the front part and that excavates into the ground, and a cylindrical divided body that is provided in a pair of two inside. With an erector device that assembles a barrel segment into a cylindrical shape, while excavating in the ground with the cutter device, an external cylindrical shape configured to form a tunnel by assembling the segment into a cylindrical shape with the erector device. A segment supply device for supplying the segment to a shield machine, which is rotatably provided around the axis of the shield machine, and conveys the segment from a stock position provided at a high place behind the shield machine to a tunnel peripheral wall portion. A vertical transfer device is provided between the vertical transfer device and a segment supply position provided corresponding to each of the vertical transfer device and the erector device. It is characterized in that it is provided with a pair of horizontal transfer devices for horizontally transferring the segments received from the above to the respective segment supply positions.

[Examples] Examples of the present invention will be described below with reference to the drawings.

1 to 3 are views showing a shield machine to which a segment feeder for a shield machine according to an embodiment of the present invention is applied.

First, the shield machine will be described. In the figure, reference numeral G indicates a natural ground, and in the natural ground G, the shield machine 10 is
A tunnel device T is excavated from the right side to the left side by a cutter device 11 provided in the front part. The wall surface of the tunnel T formed behind the shield machine 10 has segments 12, 12, ... Assembled inside the shield machine 10.
Has been primary lining by.

A cylindrical skin plate that forms the outer shell of the shield machine 10.
The tip of 13 is double formed by an outer cylinder 14 formed to have the same diameter as the skin plate 13 and an inner cylinder 15 formed to have a smaller diameter than the outer cylinder 14. Are connected to the skin plate 13 by a hollow annular partition plate 16 formed so as to be orthogonal to the axis of the skin plate 13. A penetrating ring 17 formed by forming an iron plate into a cylindrical shape is housed between the outer cylinder 14 and the inner cylinder 15.

In addition, in front of the inside of the shield machine 10, the penetration ring
17 A plurality of pushing jacks 18 for pushing out are attached at intervals in the circumferential direction (only one is shown in the illustrated example). This push jack 18 jack rod 19
Penetrates the partition plate 16 and extends forward along the axis of the skin plate 13, and the tip thereof is the penetration ring 17
It is attached to the rear end. Further, on the inner peripheral surface of the outer cylinder 14 and the outer peripheral surface of the inner cylinder 15, sealing materials 20, 2 such as lip seals are provided.
0, ... Are provided so as to sandwich the penetration ring 17 from both side surfaces thereof. With the above configuration, the penetration ring 17 is
It is configured to be slidable in the front-rear direction along the axis of the skin plate 13.

Inside the cylinder 15, a tubular mounting tube 21 having a smaller diameter than that is provided coaxially with the skin plate 13, and the inner peripheral surface of the mounting tube 21 has a slightly smaller diameter. A bottomed cylindrical support portion 22 is fitted therein. This support
The reference numeral 22 includes a tubular sliding tube 23 and partition plates 24 and 25 formed by closing the front end and the rear end of the sliding tube 23, respectively. On the inner peripheral surface of the mounting cylinder 21, slide bearings 26, 26 interposed between the mounting cylinder 21 and the sliding cylinder 23 and sealing materials 27, 27 such as lip seals, U seals and O rings are provided. There is. A cutter slide jack 29 for moving the sliding cylinder 23 is interposed between the partition plate 25 located at the rear end and the partition plate 28 provided behind the shield machine 10 and covering the entire surface thereof. As a result, the support portion 22 is a skin plate.
It is configured to be movable in the front-rear direction along the axis of 13. A center shaft 30 disposed coaxially with the axis of the shield machine 10 is extended from the partition plate 25 at the rear end of the support portion 22 to the rear of the shield machine 10 so as to project therefrom. .

On the other hand, the cutter device 11 of the shield machine 10 includes the support portion.
A support drum 31 formed to have a smaller diameter than the partition plate 24 of 22 and pivotally supported by the partition plate 24 so as to be concentric with the skin plate 13, and an axial line of the skin plate 13 fixed to the tip of the support drum 31. 6 extending radially from the
It is roughly composed of book spokes 32, 32 ,.

The spokes 32, 32, ... Are formed such that the diameter of the circle passing through the tips thereof is slightly smaller than the inner diameter of the cylinder 15. A large number of cutting blades 33, 33, ... Are arranged on the front surface of the spoke 32. Further, a tip blade 34 is stored inside the spokes 32, 32, ...
An expansion / contraction mechanism 35 including a jack or the like for expanding / contracting the shield machine 10 in the radial direction and storing / exposing the inside / outside of the spoke 32 is provided.

Further, the support drum 31 is axially supported by the partition plate 24 via a bearing 36. Further, on the inner peripheral surface of the sliding cylinder 23, a drive mechanism 37 such as a hydraulic motor which engages with the rear end portion of the support drum 31 to drive the support drum 31 to rotate is attached, whereby the entire cutter device 11 is installed. Will be rotationally driven about the axis of the skin plate 13.

Further, at the rear part of the shield machine 10, a pair of erector devices 38, 38 for assembling the segments 12, 12, ... That have been supplied from the rear at predetermined positions on the inner surface of the shield machine 10 are provided.

The eclectic device 38 is interposed between the eclectic ring 40 rotatably fitted to the center shaft 30 via a bearing 39, and the eclectic ring 40 and the center shaft 30. , A plurality of drive devices 41, 41, ... Provided at intervals, a substantially U-shaped arm 42 attached to the erector ring 40, and both ends of the arm 42 and the erector ring 40. Vertical jacks 43, 43 that can be expanded and contracted in a direction orthogonal to the axis of the shield machine 10, a segment attachment portion 44 attached to the central portion of the arm 42, and interposed between the arm 42 and the segment attachment portion 44, It is generally configured by a horizontal jack 45 that is expandable and contractable in a direction along the axis of the shield machine 10. In addition, the segment mounting portion 44 is the segment 12
It is composed of a segment gripping portion 46 that is disengageably engaged with a grout hole (not shown) in the central portion, and a bolt joining device 47 that inserts and tightens a bolt into a bolt hole (not shown) of the segment 12.

Each of the erector devices 38, 38 is configured to be separately driven by the drive device 41, 41, ....

Further, in the figure, reference numeral 50 is provided on the rear surface of the partition plate 17 of the shield machine 10 at intervals in the circumferential direction, and a shield for propelling the shield machine 10 forward by applying a reaction force to the front end of the segment 12. A jack, reference numeral 51 is a mud pipe for injecting muddy water or the like toward the face of the shield machine 10, and reference numeral 52 is the partition plate.
Reference numeral 53 is an agitator provided in the central portion of the 24, which is openable and closable, and 53 is for kneading the cutting face earth and sand and muddy water on the entire surface of the partition plate 24. Further, reference numeral 55 is a tail packing which is provided on the inner surface of the rear end portion of the skin plate 13 of the shield machine 10 and closes the gap between the segment 12 and the skin plate 13.

Further, in this embodiment, the segments 12, 12, ... Are supplied to the vicinity of the elector device 38 by the carrier device 61 as shown in FIGS. 5 to 8 and the precast concrete board for the secondary lining is provided. 76, 76, ... (described later) are supplied to the inside of the tunnel.

In this transfer device 61, girder portions 63 are provided at both ends of a bridge portion 62, and a crane 64 and a carriage 65 are provided in the bridge portion 62, and the bridge portion 62 is a shield tunnel. It is bridged between the temporary floor 66 and the concrete floor 67, and the girders 63 at both ends thereof are respectively the temporary floor 66 and the concrete floor 67.
It is supported by and. These temporary floors 66
The concrete floor 67 is provided at a predetermined height from the lower end of the tunnel.

To further explain these details, the bridge portion 62
Has a track 68 laid along its length. At each end of this bridge 62, a pair of girders 63, 63
Are provided so as to be spaced apart from each other, and traveling devices 69, 69 are provided at the lower end portions of these girder portions 63, 63, respectively. These traveling devices 69, 69 are tracks laid on both sides of the temporary floor 66 or the concrete floor 67 with a space between them.
They are placed on 70 and 71, respectively, and the entire conveying device 61 is moved along these tracks 70 and 71.

A truck 65 is mounted on a track 68 laid on the bridge portion 62. The carriage 65 includes a holding device 73 that holds the segment 12 and an elevating device 74 that elevates and lowers the holding device 73.
The above-mentioned means for moving the segment 12 from the concrete floor 67 onto the temporary floor 66 by running the carriage 65 while the segment 12 is being lifted.

Further, a crane 64 is provided below the bridge portion 62. The crane 64 supports an electric hoist 75 in a horizontally movable state, and a precast concrete plate 76 (hereinafter, simply referred to as a PC plate 76) on a concrete floor 67 is the electric hoist 75. The PC board 76 is transported to a predetermined position of the floor defect portion between the concrete floor 67 and the temporary floor 66 by lifting the electric hoist 75 and moving the electric hoist 75.

Further, on the temporary floor 66, the trolley 65 is used for the temporary floor.
A transport carriage 78 is provided for transporting the segment 12 transported onto the 66 to the front end of the temporary floor 66 near the erector device 38. The carrier vehicle 78 is configured to run on tracks 79, 79 laid on the temporary floor 66. Throughout all of these, the segment 12 is supplied in a state in which its axis is vertically long in a direction orthogonal to the axis of the shield machine 10. In addition, on the concrete floor 67, the segment 12 and the PC board 76 have a front end portion of the concrete floor 67, that is, the concrete floor 67 and the temporary floor 66, by using the transport carriage 77 having substantially the same configuration as the segment transport carriage 78. It is supplied even near the floor defect in between.

Then, the segment 12 transported to the front end of the temporary floor 66
Is a segment supply position 81 provided near the lower side wall (skin plate 13) in the shield machine 10 in the vicinity of the erector devices 38, 38 from the temporary floor 66 by using the segment supply device 80 which is an embodiment of the present invention. , 81 are supplied (see FIG. 1). It should be noted that these segment supply positions 81, 81 are about 6 mm apart from the center of the shield machine 10 in order to secure a mounting space for a perfect circle holding device (not shown) arranged in the shield machine 10.
It is in a twisted position about 0 °.

This segment supply device 80 is located at the front end of the temporary floor 66, and a segment stock rack (stock position) 82 for temporarily stocking one ring of segment 12 ,.
A segment transfer vehicle (not shown) for transferring the segment 12 from the transport vehicle 78 to the stock rack 82 and a center shaft 30 of the shield machine 10 are rotatably provided, and the segment 12 is mounted at the tip of the stock rack 82. Vertical transport device 83 that receives and lowers this to near the inner wall surface of the tunnel
And a pair of horizontal transport devices 84, 84 for receiving the segment 12 from the vertical transport device 83 and horizontally transporting the segment 12 to the segment supply positions 81, 81.

The segment stock rack 82 has such a length that the segments 12 for one ring can be laid in line, and can be freely moved on the tracks 86, 86 on the temporary floor 66 by the moving vehicle 85, ... A frame 87 having a substantially U-shaped cross section, an internal orbit (not shown) provided inward of the frame 87 and extending in the length direction thereof, and mounted on the internal orbit, and a segment is provided on the upper part. It is composed of a segment transfer carriage (not shown) which is capable of self-propelled on an internal orbit while 12 is mounted. Further, a delivery device 88 including a cylinder or the like for delivering the segment 12 to the vertical transfer device 83 is attached to the front end of the stock rack 82.

Further, the segment transfer carriage is formed in an external gate shape that straddles the segment stock rack 82, and transfers the segment 12 between the transport carriage and the segment stock rack 82 in a state where the segment 12 is suspended. It is structured like a portal crane.

Further, the vertical transfer device 83 is a pair of screw rods arranged to face each other with the center shaft 30 of the shield machine 10 interposed therebetween.
89, 89 and a support rod 90 located in front of the screw rod 89 and similarly arranged to face each other with the center shaft 30 interposed therebetween.
90, a base 90a connecting the lower ends of the screw rods 89, ... And the support rods 90 ,, and the screw rods 89 ,. And a threaded rod
A table member 91 screwed to 89, ... And a segment provided on the table member 91 provided at the front end of the stock rack 82.
It is roughly configured by a delivery device 92 including a cylinder or the like for delivering 12. The sending device 92 and the other devices are in a state of being cut off.

Further, the center shaft 30 is provided with a gear 93 at all positions corresponding to the support rods 90, 90, and the support rod 90 is provided with a small gear 94 and a motor 95 which mesh with the gear 93, respectively. Has been. Further, a circumferential groove 96 is engraved over the entire circumference of the support rod 90, ... on the front center shaft 30, and each support rod 90 extends toward the circumferential groove 96 and A stay 97 that engages at the tip is provided. As a result, the vertical transport device 83 as a whole is configured to be rotatable about the center shaft 30, that is, the axis of the shield machine 10. The screw rods 89, 89 are axially rotatable by a driving device (not shown), and the table member 91 is vertically moved by the rotation of the screw rods 89, ....

Further, the horizontal transfer device 84 is provided near the inner wall surface of the tunnel connecting the segment supply position 81 and the lower end of the vertical transfer device 83, and the center shaft of the shield machine 10 is provided.
A base 98 fixed to 30 and extending in a direction along the axis thereof.
A cylinder 99 that is provided at the rear end of the base 98 and that pushes out the segment 12 that has been placed on the table member 91 of the vertical transfer device 83 and has descended, and the segment that has been pushed out.
Drive roller 10 for transferring 12 to segment feed position 81
It consists of 0, 100, and so on.

Next, a segment supply method for the shield machine using the shield machine 10, the transport device 61, and the supply device 80 having the above-described configurations will be described.

(I) Segment supply The segment 12 that has been transported on the concrete floor 67 by being placed on the control transport vehicle 77 is transported by the vehicle 65 on the bridge 62.
The hoisting device 74 is held and hoisted, and in this state, the carriage 65 is moved along the bridge portion 62, so that the segment 12 has a floor defect portion between the concrete floor 67 and the temporary floor 66 and the crane. Temporary floor 66 passing above 64
Move it to the top.

Along with this, the PC board 76, which is placed on the carriage 77 and carried on the concrete floor 67, is lifted by the crane 64,
By transporting this PC board 76 to a predetermined position of the floor defect portion, installing it and constructing a concrete floor 67, the concrete floor 67 is extended forward. And
Each time this concrete floor 67 extends a specified length,
Move the entire carrier device 61 forward, and at the same time, move to the temporary floor.
66 is removed from the rear one by one.

Then, the segment 12 moved to the rear end of the temporary floor 66
Is transported to the front end of the temporary floor 66 by using the transport carriage 78.

From the above, such a transfer device 61 is a shield machine.
Suitable for constructing a concrete floor 67 behind it in parallel with the excavation of 10 and the assembly of the segment 12, PC
The plate 76 is assembled and the concrete floor 67 is constructed, and the segment 12 supplied to the front end of the concrete floor 67 under construction is transferred to the rear end of the temporary floor 66 to construct the concrete floor 67. Even in the middle of this, the segment 12 can be supplied to the shield machine 10 without any trouble.

(Ii) Segment supply The segment 12, which has been transported to the front end of the temporary floor 66 by the transport carriage 78, is transferred onto the transfer carriage of the stock rack 82 by the segment transfer carriage located at the rear end of the segment stock rack 82. Listed. Next, when the segment 12 is placed on the transfer cart, the transport cart sequentially moves forward, so that the segment 12 is transferred to the front of the stock rack 82. This operation is continued until one ring of segments 12, 12, ... Is stocked on the stock rack 82.

Next, along with the excavation process of the shield machine 10, segment 1
When it becomes a stage to supply 2, ... into the shield machine 10, the delivery device 92 at the tip of the stock rack 82 makes a segment.
12, ... Are sequentially sent to the vertical transport device 83.

In the vertical transport device 83, first, the table member 91 is placed in the delivery device 92.
Then, the segment 12 is transferred onto the table member 91 by the delivery device 92 after the segment 12 is lifted up to a height substantially the same as the above. Next, the table member 91 is lowered by rotating the screw rods 89, 89 in one direction, and the table member 91 is driven by the motor 95.
Is rotated about the axis of the shield machine 10 to transport the segment 12 above the horizontal transport device 84.

In the horizontal transport device 84, the cylinder 99 pushes the segment 12 forward so that the segment 12 is driven by the drive rollers 100, 1.
00, ... Further, the segment 12 is advanced by driving the driving rollers 100 ,. In this way, the segment 12 is supplied to the segment supply position 81 near the elector device 38.

(Iii) Segment assembly The segments 12, 12, ... Are supplied to the segment supply positions 81, 81 near the erector devices 38, 38, and the shield machine 50 as a whole is propelled forward by the extension of the shield jacks 50 ,. After that, the pre-assembly of the predetermined number of segments 12, ... Is performed by either one of the erector devices 38.

That is, the drive devices 41, 41, ...
The segment mounting portion 44 of the 38 is brought to above the segment 12. Next, after the segment gripping portion 46 of the segment mounting portion 44 is engaged with the grout hole of the segment 12, the vertical jacks 43, 43 are shortened to lift the segment 12 by a predetermined height. Further, the drive devices 41, ... Are driven to rotate the elector ring 40, and thereby the segment 12 is brought to a position above a predetermined assembly position on the inner surface of the shield machine 10. Then, the vertical / horizontal jacks 43, 45 and the segment mounting portion 44 are used to finely adjust the position of the segment 12, and the vertical jacks 43, 43 are extended to assemble the segment 12. Further, the segment 12 is fixed by inserting a bolt into the bolt hole of the segment 12 using the bolt joining device 47 and tightening the bolt.

After the pre-assembly of segment 12, ...
Assembling work of the segments 12, ... That is, while one of the erector devices 38 is performing the gripping work of the supplied segment 12, the other erector device 38 performs the destination of assembling the segment 12 at a predetermined position on the inner surface of the shield machine 10, and thereby, the segment 12 The aim is to shorten the assembly period.

Then, when the assembling work of the 1-ring segment 12, ... Is completed, a reaction force is applied to the front end portion of the assembled segment 12 ,.
The shield machine 10 is propelled forward by extending 50, .... Hereinafter, by repeating these steps, the ground G
While excavating the tunnel T inside, segment 1 on its inner surface
2. Can be lined with ...

Here, in this embodiment, a pair of segment supply positions 81, 81 are provided near the peripheral wall of the lower part of the shield machine 10 corresponding to the pair of erector devices 38, 38, respectively, and the vertical transfer device 83 is provided.
And the segment feed position 81, 81 between the horizontal transfer device 8
4 and 84 are provided respectively, and segment supply position 8
The segment 12 can be supplied to each of 1 and 81. This allows the respective elector devices 38, 38 to independently move to the segment supply positions 81, 81 to receive the segment 12. That is, since the phenomenon such as the interference of the erector devices 38, 38 at the segment supply positions 81, 81 does not occur, each erector device 38, 38 can independently perform the segment holding work or the segment assembling work, and the erector device 38 By providing a pair of (38), 38, it is possible to sufficiently shorten the construction period.

Further, since the vertical transfer device 83 is configured to be rotatable around the axis of the shield machine 10, the vertical movement and the rotation operation of the segment 12 can be performed by the same device, and the structure of the segment supply device 80 as a whole is simple. Becomes That is, in this embodiment, the segment supply positions 81, 81 are twisted by about 60 ° from the center of the shield machine 10 in order to secure a space for the perfect circle holding device, and therefore the conventional shield machine further rotates the segment. Although a device is required, in this embodiment, the rotation operation can be performed by the vertical transfer device 83, which is very rational.

Furthermore, if the shield machine 10 rolls (rotates around the axis), the vertical transfer device 83 and the horizontal transfer device 84 also roll rig similarly, but do not roll.
Segment 12 from 66 to rolled horizontal conveyor 84
This has an excellent advantage that it can be easily dealt with by adjusting the rotation angle of the vertical transport device 83 even when transferring.

The details of the segment supply device for the shield machine according to the present invention are not limited to the above-described embodiments, and various modifications are possible. As an example, in the above-described embodiment, the transfer from the stock rack 82 to the vertical transfer device 83 and the transfer from the vertical transfer device 83 to the horizontal transfer device 84 were performed by cylinders. Needless to say, this may be performed by a driving roller.

[Advantages of the Invention] As described in detail above, according to the present invention, the segment supply positions are provided corresponding to the pair of erector devices, and the horizontal position is provided between the vertical transport device and each segment supply position. Since each transport device is provided, each erector device can independently perform segment gripping work and segment assembling work, and the construction period can be sufficiently shortened by providing a pair (two) of erector devices. be able to.

Further, since the vertical transfer device is configured to be rotatable about the axis of the shield machine, the vertical movement and the rotation operation of the segment can be performed by the same device, and the structure of the segment supply device as a whole becomes simple.

[Brief description of drawings]

1 to 3 are views showing a segment feeder for a shield machine according to an embodiment of the present invention.
The figure is a cross-sectional view showing the entire configuration including the shield machine, FIG. 2 is a left side view of the shield machine, and FIG. 3 is III-III ′ of FIG.
4 is a sectional view taken along the line IV-IV 'in FIG. 1, and FIGS. 5 to 8 are views showing the segment conveying device. FIG. A perspective view showing the overall configuration,
6 is a side view of the same, FIG. 7 is a sectional view taken along the line VII-VII ′ of FIG. 6, and FIG. 8 is a sectional view taken along the line VIII-VIII ′ of FIG. The figure is a diagram showing a segment supply method to a conventional shield machine. 10 …… Shield machine, 11 …… Cutter device, 12 …… Segment, 13 …… Skin plate, 38 …… Electa device, 80…
… Segment supply device, 81 …… Segment supply position, 82
…… Segment stock rack (stock position), 83…
… Vertical transport device, 84… Horizontal transport device.

Claims (1)

[Claims] 1. A cutter, comprising: a cutter device provided at a front portion for digging into the ground; and an erector device provided in a pair of two inside to assemble segments as cylindrical divided bodies into a cylindrical shape. While excavating in the ground with a device, a segment supply device for supplying the segment to an external cylindrical shield machine configured to form a tunnel by assembling the segment into a cylindrical shape with the erector device, It is rotatably installed around the axis of the shield machine,
A vertical transport device that transports the segment from the stock position provided at a high place behind the shield machine to the peripheral wall of the tunnel,
Disposed between the vertical transport device and the segment supply position provided corresponding to each of the erector devices,
2. A segment supply device for a shield machine, comprising: a pair of horizontal transfer devices for horizontally transferring a segment received from a vertical transfer device to the respective segment supply positions.