JP3363875B2 - Segment feeder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment supply device for supplying a segment to an erector provided at a rear portion of a shield body.

[0002]

2. Description of the Related Art The conventional shield construction method is
A tunnel is formed by excavating the ground with a shield machine and then assembling segments with an erector provided at the rear of the shield body.

As a general method of supplying a segment to this erector, a segment is placed on a tire roller provided on an existing segment and pushed out by a hydraulic jack from the rear, or a segment is placed on a chain conveyor and sent out. However, there is a need for a means that can more rapidly supply segments to the erector.

As a conventional technique for supplying a segment to such an elector, there is a segment transfer device described in Japanese Utility Model Laid-Open No. 6-28000. This segment transfer device is provided with a main frame that moves forward and backward between a segment assembly position by an erector and an existing rear segment, and a segment is placed on the upper surface, and a lift jack on the main frame. An up-down rail frame and a segment carrier that is provided on the up-down frame so as to be able to move forward and backward and on which a segment can be placed can be provided.

According to this segment carrier, the segment carried from the rear is lowered onto the main frame,
By extending the lift jack to raise the segment carrier together with the up / down rail frame and then moving the segment carrier forward, the segment is moved forward while the segment is mounted on the segment carrier, and the lift jack is contracted. The segment is supported on the main frame in the forward position.

[0006]

However, in the case of the above segment transfer device, the space for providing the up / down rail frame between the lift jack and the segment transfer car or the sliding of the segment transfer car on the up / down rail frame. A space for installing the wheels of the vehicle on the dolly is required. In addition, a space for providing a large lift jack is required to lift and lower a large weight including the segment transport carriage on which a plurality of segments are mounted and the up / down rail frame. Therefore, the overall height of the segment transfer device is increased.

When the total height of the segment transfer device is increased in this way, the gap between the segment transfer device for supplying the segment to the erector and the earth discharging device such as a conveyor provided at the rear of the shield machine is narrowed, The size of the earth removing device is limited, and the workability is deteriorated due to the reduction of the space inside the shield machine.

Further, in the above-mentioned prior art, since the segment gripping position of the erector and the relative position of the supply device are constantly changing, it is difficult to deliver the segment to the erector. Moreover, since the elevating frame of the supply device has a one-piece structure, it is very difficult to deliver the segment during curved construction.

[0009]

In order to solve the above problems, the present invention is directed to a main body frame which supports both side portions of a segment at the upper end thereof, and slides on the main body frame in the axial direction of the shield machine. A slide frame and an elevating frame that protrudes upward from the body frame to support the central portion of the segment on the slide frame are provided, and the elevating frame is provided between the slide frame and the elevating frame at an upper end of the body frame. An elevating device for elevating so as to project from the elevating device is provided, and in the elevating device, a horizontally arranged lifting jack provided between the slide frame and the lifting frame, and an axial front and rear direction of the shield machine by expansion and contraction operation of the lifting jack. A wedge member that slides; and a slide member that moves along the inclined surface of the wedge member to move the elevating frame up and down,
The lifting jack is supported so as to be movable back and forth in the axial direction and is expanded and contracted so that the front and rear of the lifting frame can be raised and lowered evenly. In this way, the elevating frame is moved up and down by the wedge member by the expansion and contraction operation of the elevating jack supported so as to be movable back and forth in the axial direction, so that the horizontal force of the elevating jack is evenly applied to the front and rear wedge members, resulting in a large weight. It is possible to stably raise and lower the lifting frame equipped with the segment. Further, the elevating device can be lowered to form a segment supply device having a low overall height.

The elevating frame may be configured to have an axial length corresponding to each piece of the segment, an elevating device may be provided for each elevating frame, and the elevating frame may be configured in a number capable of mounting one ring of the segment. In this case, the elevating frame can be made compact so that one piece can be mounted, and segments for one ring can be continuously and efficiently supplied.

Further, the main body frame is composed of a front row main body frame and a rear row main body frame, and the front row main body frame and the rear row main body frame are connected by a horizontally bendable connecting member, and the front row main body frame is shielded. If it is mounted on the rear work deck of the main unit and the rear row main frame is provided with wheels so that it can travel on the existing segment, the relative position between the segment supply device and the erector will always be constant, and easy segment supply to the erector will be possible. You can do it.

Further, a rotary table which is rotatable in the horizontal direction is provided above the lifting frame provided at the front end of the rear row main body frame, and the rotary table is biased at a predetermined angle between the rotary table and the lifting frame. If a stopper is provided at the rear end segment mounting position of the front row main body frame that comes into contact with the front portion of the segment sent from the elevating frame of the rear row main body frame, the shield excavator is bent after it is bent. When transferring a segment from the side body frame to the front body frame, the segment can be rotated and sent along the angle of the front body frame, so a stable segment supply even for shield excavators that perform bending work It can be performed.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1 is a side sectional view of a segment supply device showing an embodiment of the present invention, and FIG.
3 is a sectional view taken along the line A-A shown in FIG. 4 is a side sectional view showing a lowered state in the segment supply device of FIG. 1, and FIG. 5 is a sectional view taken along line CC of FIG. FIG. 6 is a side sectional view showing a shield machine equipped with the segment supply device shown in FIG. 1.

As shown in FIG. 1, the segment feeder N
Includes a body frame 1 which supports both sides of the segment S at the upper end and extends in the axial direction of the shield machine M (FIG. 6),
A slide frame 2 that slides on the main body frame 1 in the segment supply direction (the shield machine axis direction),
An elevating frame 3 that projects upward from the upper end of the slide frame 2 and supports the segment S is provided. The main body frame 1 of this embodiment, as shown in FIGS.
It is composed of a central portion 4 having a U-shaped cross section with an open upper portion, and a support portion 5 extending from the central portion 4 to both sides. A support member 6 is provided on each of the support portions 5 of the body frame 1 so as to support the segment S in a stable state.

Further, as shown in FIG. 1, in this embodiment, the main body frame 1 is composed of a front row main body frame 1A and a rear row main body frame 1B. The front row main body frame 1A and the rear row main body frame 1B are connected by a horizontally bendable connecting member 7. The front row body frame 1A is the rear working deck 8 of the shield body.
Installed on. As shown in FIG. 3, the rear row main body frame 1B is provided with wheels 9 on the lower surface of the support portion 5 and is configured to be pulled by the front row main body frame 1A so as to travel on the existing segment T. The wheel 9 is provided at an angle that follows the arc of the inner surface of the existing segment T. Further, as shown in FIG. 1, the wheels 9 are evenly arranged in the central portion in the longitudinal direction of the elevating frame 3, and are configured so that they can travel stably on the existing segment T.

By mounting the front row main body frame 1A on the rear working deck 8 of the shield main body in this manner, the relative position between the front row main body frame 1A and the rear working deck 8 is always constant, so that the relative position between the rear working deck 8 and the rear working deck 8 is fixed. It is possible to easily specify the positional relationship between the erector E (FIG. 6) whose position does not change and the front row main body frame 1A. Therefore,
The segment S sent out from the front row main body frame 1A can always be reliably sent to the delivery position of the erector E, so that stable segment transfer can be performed.

The slide frame 2 is composed of a slide body 10 (FIG. 2) having a U-shaped cross section with an open upper portion, and a linear guide 11 provided between the slide body 10 and the body frame 1. The linear guide 11 is composed of a groove-shaped guide 12 provided on the upper surface of the main body frame 1, and a rail 13 provided on the lower surface of the slide frame 2 and sliding along the groove-shaped guide 12. Such a linear guide 1
According to 1, the transfer of the heavy segment S can be performed smoothly, stably and accurately.

Further, as shown in FIG. 1, the main body frame 1
Between the slide frame 2 and the slide frame 14
By extending and contracting the slide jack 14, the rail 13 of the slide frame 2 is guided by the groove guide 12 and slides in the shield machine axial direction. The linear guide 11 may have other configurations, and is not limited to this embodiment as long as the slide frame 2 can be slid in the axial direction.

As shown in FIG. 4, the elevating frame 3 has a U-shaped cross section in a side view, and a guide provided between the vertical wall surface 15 of the slide frame 2 and the elevating frame 3. By the roller 16, the vertical wall surface 1 of the slide frame 2
It is configured to move up and down along 5. The elevating device 17 for elevating the elevating frame 3 includes one elevating jack 1 horizontally arranged between the elevating frame 3 and the slide frame 2.
8, a wedge member 19 that slides in the axial direction before and after the lifting jack due to the expansion and contraction of the lifting jack 18, and a slide bracket 20 that is a sliding member that slides along an inclined surface of the wedge member 19 that gradually decreases toward the non-jack side. It is configured. The lift jack 18 and the wedge member 19 are provided on the slide frame 2 side, and the slide bracket 20 is provided on the lift frame 3 side.

The lifting jack 18, as shown in FIG.
A support member 22 for swingably supporting the jack body 21.
Although it is laterally restricted by a guide member 23 provided on the slide frame 2, it is configured so as to be movable back and forth in the axial direction. In this way, by constructing the lifting jack 18 so as to be movable only forward and backward in the axial direction, even if the lifting jack 18 is extended to one side as shown in FIG. Both wedge members 19 are slid in the front-rear direction so that there is no difference in resistance. Therefore, since both the slide brackets 20 are lifted up uniformly by these wedge members 19, the front and rear of the elevating frame 3 can be lifted up evenly. In this embodiment, the structure for elevating the elevating frame 3 is composed of the elevating jacks 18. However, the elevating frame 3 on which the segment S is placed can be raised while maintaining the elevating frame 3 in a horizontal state. However, the present invention is not limited to this embodiment.

The upper surface of the wedge member 19 provided at the front and rear of the lifting jack 18 is formed with an inclined surface 24 which gradually decreases from the center toward the front and rear direction. Further, as shown in FIGS. 2 and 3, between the elevating frame 3 and the slide frame 2, an elevating jack 18 for elevating the elevating frame 3 is provided.
Spring member 2 forcibly lowering the elevating frame 3 when contracting the
5 are provided. Four spring members 25 are provided at the corners of one elevating frame 3. By providing this spring member 25, the elevating frame 3 can be lowered quickly and reliably. In this way, since the wedge member 19 that is lifted by the horizontal force of the lifting jack 18 lifts the lifting frame 3 through the slide bracket 20,
Large horizontal forces can be obtained with small horizontal forces. Therefore, the elevating frame 3 on which the heavy segment S is placed can be moved up and down by the small elevating jack 18.

As shown in FIG. 4, the slide bracket 20 includes a fixed bracket 26 provided on the lower surface of the elevating frame 3.
And a movable bracket 28 connected to the fixed bracket 26 and a pin 27. The lower surface of the movable bracket 28 is provided with a roller member 29 for sliding with the upper surface of the wedge member 19. This roller member 29 is
It may be an oilless plate (oil-containing plate) or the like.

Further, as shown in FIG. 1, in this embodiment, the vertical length of the elevating frame 3 is formed to have a size corresponding to each segment. In the figure, three lifting frames 3 are provided for both the front row main body frame 1A and the rear row main body frame 1B. In this example, the segment 1 ring is composed of 6 segments S, and the segment 1 ring is composed by 6 segment pieces supplied by the front row main body frame 1A and the rear row main body frame 1B. ing. Moreover, a plurality of elevating frames 3 are provided for each segment, and an elevating device 17 is provided on each elevating frame 3.
Since it is provided, even if the weight of one piece of the segment is large, the segment can be reliably and stably moved up and down.

By providing the elevating frame 3 for mounting each segment piece as in this embodiment, even if the segment S is mounted only on the top side of the elevating frame 3, only the elevating frame 3 is placed. Can be raised and lowered to feed the segment S. Also, in this example, the three lifting frames 3 are
Although an example in which it is provided on the slide frame 2 of the table is shown, the elevating frames 3 may be provided as appropriate depending on the number of divisions of the segment S and the total length of the segment supply device N.

As shown in FIG. 6, in the segment feeding apparatus N thus constructed, the front row main body frame 1A is fixed to the rear working deck 8 of the shield machine M. Between the front row main body frame 1A and the rear row main body frame 1B,
Since they are connected by the bendable connecting member 7, the front row main body frame 1 that moves integrally with the shield machine M
Pulled by A, the rear row body frame 1B travels on the existing segment T by the wheels 9.

7 to 11 are diagrams showing a segment supply procedure by the segment supply device N having the above-mentioned configuration. The segment supply procedure will be described below with reference to these figures.

FIG. 7 is a side sectional view showing the ascending state of the segment feeding device of FIG. 1, and FIG. 8 is a D- line shown in FIG.
D sectional view, FIG. 9 is a side sectional view showing the next stroke of the segment feeder shown in FIG. 7, FIG. 10 is a side sectional view showing the next stroke of the segment feeder shown in FIG. 9, and FIG. 11 is a segment shown in FIG. It is a sectional side view which shows the next process of a supply apparatus. In this example, as shown in FIG. 6 described above, a flow of sending the segment S from the front row main body frame 1A to the erector E will be described.

As shown in FIG. 4 described above, from the state in which the segments S are respectively placed on the three elevating frames 3 on the slide frame 2 provided on the front row main body frame 1A, as shown in FIG. , The lifting jack 18 is extended to extend the wedge member 1.
Move 9 horizontally. As a result, the slide bracket 20 rises along the inclined surface 24 of the wedge member 19,
The elevating frame 3 raises the segment S from the front row main body frame 1A by a predetermined amount. As a result, as shown in FIG. 8, the segment S placed on the front row main body frame 1A is supported by the upper end of the elevating frame 3, so that the segment S
Is in a state of floating from the main body frame 1A.

Next, as shown in FIG. 9, by extending the slide jack 14, the slide frame 2 is slid forward by one pitch along the linear guide 11. At this time, since the rail 13 provided on the lower surface of the slide frame 2 slides along the groove-shaped guide 12 provided on the front row main body frame 1A, it can be slid with a small force. The state of this figure is a state in which the segment S indicated by the two-dot chain line in FIG. 6 is supplied to the erector E, and the segment S mounted on the lift frame 3 at the leading position is transferred to the grip position of the erector E. There is. In this state, the erector E holds the segment S at the leading position and installs it at a predetermined position.

In this way, the segment S is connected to the elector E.
After feeding to the lifting jack 1, as shown in FIG.
The elevating frame 3 is lowered into the slide frame 2 by contracting 8 and moving the wedge member 19 to the jack side. At this time, it can be easily lowered by the spring member 25 (FIG. 2) provided on the elevating frame 3. By lowering the lifting frame 3, the remaining segments S supplied to the erector E
(2 pieces) will be mounted on the upper end of the main body frame 1A. Each of the mounted segments S corresponds to one pitch,
It is a position moved to the side of the erector E.

After placing the segment S on the front row main body frame 1A in this manner, the slide jack 14 is contracted as shown in FIG. 11, and the slide frame 2 is moved to the front row main body frame as shown in FIG. The shield machine M is retracted in the axial direction to a position corresponding to the frame 1A. In this state, the other segment S is moving forward by one pitch.

The above procedure is one cycle, and by repeating the same procedure, the segment S mounted on the main body frame 1A can be sequentially supplied to the erector E by the elevating frame 3 provided on the slide frame 2. it can. After that, the segment S is sequentially supplied from the rear, and the tunnel is formed by repeating the above operation.

The segment S supplied in this way
As shown in FIG. 6, since the front row main body frame 1A is attached to the work deck 8 of the shield main body, the relative positions of the erector E and the supply device N are always the same, and the segment transfer to the erector E is easy. It can be done accurately and accurately. Moreover, automation can be easily performed.

FIG. 12 is a main part plan view showing a main body frame connecting portion in the segment supply device of FIG.
FIG. 3 is a side sectional view of the segment supply device. 14 is a plan view of relevant parts showing the operation of the segment supply device shown in FIG. 12, and FIG. 15 is a sectional view taken along line EE shown in FIG. Hereinafter, in the shield excavator capable of curving, segment supply at the curving main body frame connecting portion will be described.

As shown in FIGS. 12 and 13, on the upper part of the elevating frame 3A provided at the head position of the rear row main body frame 1B,
The rotary table 30 is provided so that its upper surface is the same as the height of the other lifting frames 3. This rotary table 30
A convex portion 32 that is inserted into a concave portion 31 provided in the upper center of the elevating frame 3A is provided on the lower surface, and is rotatably provided around the convex portion 32. Also, this rotary table 3
0 is formed in a rectangular shape similar to the upper surface of the elevating frame 3A, and its posture is controlled by a biasing member that always biases the longitudinal direction at a predetermined angle that matches the longitudinal direction of the elevating frame 3A. In this attitude control, spring members 33 as biasing members are provided between the four corners of the rotary table 30 and the four corners of the elevating frame 3A,
This is performed by applying the biasing force of the spring member 33 so that the rotary table 30 always faces the same direction as the elevating frame 3A.

On the other hand, as shown in FIG. 14, two rotary stoppers 34 projecting from the front row main body frame 1A are provided at the rearmost segment mounting positions of the front row main body frame 1A. The rotary stopper 34 is provided in the central portion 4 of the front row main body frame 1A, and does not contact the placed segment S in the tilted state, but is transferred from the rear row main body frame 1B in the raised state. The front surface of S is configured to abut.

The delivery of the segment S by the segment supply device N configured as described above will be described below.
In the following description, only the portion that transfers the segment S from the front end of the rear row main body frame 1B to the rear end of the front row main body frame 1A will be described.

First, the slide frame 2 is sent forward while the elevating frame 3 of the front row main body frame 1A is raised, and the segment S on the front row main body frame 1A is moved forward. Then, as shown in FIG. 15, two rotary stoppers 34 provided on the front row main body frame 1A are set up. In this state, the lifting frame 3 of the rear row body frame 1B
By moving A upward and sending the slide frame 2 forward, the segment S is transferred to the front row main body frame 1A side.

By this transfer, one front portion of the segment S transferred from the rear row main body frame 1B to the front row main body frame 1A contacts the rotary stopper 34 provided in the front row main body frame 1A. At this time, one of the rotary stoppers 34 comes into contact first, but the segment S of the rear row main body frame 1B is further moved forward with the rotary stopper 34 brought into contact therewith, so that the segment S together with the rotary table 30 is moved forward. Is rotated, and the transfer is stopped when the segment S comes into contact with the both rotary stoppers 34. As a result, as shown in FIG. 14, the segment S passed to the front row main body frame 1A is rotated together with the turntable 30 to an angle at which the front surface is orthogonal to the axial direction of the front row main body frame 1A.

Then, in this state, the rear row main body frame 1B
By lowering the elevating frame 3A, the segment S placed on the elevating frame 3A at the leading position is moved to the front row main body frame 1
It is supported on the upper part of A, and the delivery of the segment S is completed.

In this way, the lifting frame 3A with a rotating mechanism after the segment S is transferred to the front row main body frame 1A
When the segment S separates, the force is quickly returned to the original angle by the force of the spring members 33 provided at the four positions. After that, if the slide frame 2 of the rear row main body frame 1B is pulled back and the slide frame 2 of the front row main body frame 1A is pulled back, the front row main body frame 1B and the front row main body frame 1B are bent in a state where the front row main body frame 1A and the rear row main body frame 1B are bent. The work of transferring the segment S to 1A is completed.

As described above, the elevating frame 3 is provided for each piece of the segment, the elevating frame 3A at the head position of the rear row main body frame 1B is provided with the rotary table 30 rotatable in the horizontal plane, and the predetermined position of the front row main body frame 1A is provided. By providing the rotation stopper 34 on the front row main body frame 1A, the curved portion between the front row main body frame 1A and the rear row main body frame 1B that is bent ( The delivery of the segment S at the curved portion can be performed stably, smoothly, and reliably to a predetermined position (fixed position, angle) of the front row main body frame 1A. Therefore, even when the connecting portion is delivered at a curved portion, the segment S delivered to the front row body frame 1A is always delivered so as to coincide with the axis of the front row body frame 1A, that is, the axis of the shield machine M. it can.

According to the segment supply device N as described above, the segment transfer mechanism has a support function, a slide function,
Main frame 1, slide frame 2,
Since the lifting frame 3 and the structure in which the roles are completely shared are provided, it is possible to easily perform the transfer operation of the segment S reliably, accurately, and highly accurately.

In the above-described embodiment, the front row main body frame 1A and the rear row main body frame 1B provided with the elevating frames 3 on which the three segments S can be mounted have been described as an example, but the number of elevating frames 3 is set appropriately. However, the present invention is not limited to these embodiments.

The above-described embodiment is an embodiment, and various modifications can be made without departing from the spirit of the invention of the present application, and the invention of the present application is not limited to the above-described embodiment.

[0046]

The present invention is carried out in the form as described above and has the following effects.

Since the elevating frame is moved up and down by the wedge member by the expansion and contraction operation of the elevating jack supported so as to be movable back and forth in the axial direction, the horizontal force of the elevating jack acts evenly on the front and rear wedge members, resulting in a large weight. It is possible to stably move the elevating frame on which the segments are mounted to move the segments. Further, since the elevation device can be lowered to configure the segment supply device having a low overall height, it is possible to improve workability in the shield machine.

[Brief description of drawings]

FIG. 1 is a side sectional view of a segment supply device showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA shown in FIG.

FIG. 3 is a sectional view taken along line BB shown in FIG.

4 is a side sectional view showing a lowered state in the segment supply device of FIG. 1. FIG.

5 is a sectional view taken along line CC of FIG.

FIG. 6 is a side sectional view showing a shield machine equipped with the segment supply device shown in FIG. 1.

FIG. 7 is a side sectional view showing a lifted state in the segment supply device of FIG.

8 is a cross-sectional view taken along the line DD shown in FIG.

9 is a side sectional view showing a next step of the segment supply device shown in FIG.

FIG. 10 is a side sectional view showing a next step of the segment supply device shown in FIG.

FIG. 11 is a side sectional view showing a next step of the segment supply device shown in FIG.

FIG. 12 is a plan view of relevant parts showing a main body frame connecting portion in the segment supply device of FIG. 1;

13 is a side sectional view of the segment supply device shown in FIG.

FIG. 14 is a plan view of relevant parts showing the operation of the segment supply device shown in FIG.

15 is a cross-sectional view taken along line EE shown in FIG.

[Explanation of symbols]

1 ... Body frame 1A ... Front row main frame 1B ... Rear row body frame 2 ... slide frame 3 ... Lifting frame 4 ... Locking member 5 ... Supporting part 6 ... Support member 7 ... Connecting member 8 ... Rear work deck 9 ... Wheels 10 ... Slide body 11 ... Linear guide 12 ... Channel guide 13 ... Rail 14 ... Slide jack 15 ... Wall surface 16 ... Guide roller 17 ... Lifting device 18 ... Lifting jack 19 ... Wedge member 20… Slide bracket 21 ... Jack body 22 ... Support member 23 ... Guiding member 24 ... Inclined surface 25 ... Spring member 26. Fixed bracket 27 ... pin 28 ... Movable bracket 29 ... Roll member 30 ... Rotary table 31 ... Recess 32 ... Projection 33 ... Spring member 34 ... Rotary stopper S ... segment T: Existing segment E ... Electa M ... Shield machine N ... Segment feeder

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yukihisa Harada Maeda Construction Industry Co., Ltd., 10-26, Fujimi Nichome, Chiyoda-ku, Tokyo (56) References Japanese Patent Laid-Open No. 10-205294 (JP, A) 6-28000 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E21D 11/40

Claims (4)

(57) [Claims] 1. A body frame that supports both sides of the segment at its upper end, a slide frame that slides on the body frame in the axial direction of the shield machine, and a body frame that projects upward from the body frame on the slide frame. An elevating frame that supports the central portion of the segment is provided, and an elevating device that elevates the elevating frame so as to project from the upper end of the main body frame is provided between the slide frame and the elevating frame, and the elevating device slides. A horizontally arranged lifting jack provided between the frame and the lifting frame, a wedge member that slides back and forth in the axial direction of the shield machine by the extension and contraction operation of the lifting jack, and moves along the inclined surface of the wedge member. A slide member for raising and lowering the elevating frame is provided, and the elevating jack is movably supported in the front and rear direction in the axial direction to extend and contract to the front of the elevating frame. A segment feeder configured to raise and lower the rear evenly. 2. The length of the elevating frame in the axial direction is set so as to correspond to each segment, and each elevating frame is provided with an elevating device. The segment supply device according to claim 1, wherein 3. The main body frame is composed of a front row main body frame and a rear row main body frame, the front row main body frame and the rear row main body frame are connected by a horizontally bendable connecting member, and the front row main body frame is shielded. The segment supply device according to claim 1 or 2, wherein the main body is mounted on a rear work deck, and the rear row main body frame is provided with wheels so as to be able to travel on an existing segment. 4. A rotary table that is rotatable in the horizontal direction is provided above the lifting frame provided at the front end of the rear row body frame.
An urging member that urges the rotary table at a predetermined angle is provided between the rotary table and the lifting frame, and a segment front portion that is fed from the lifting frame of the rear row main frame to a rear end segment mounting position of the front row main frame. 4. The segment supply device according to claim 3, further comprising a stopper with which the abutment contacts.