JP3020903B2 - 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 supplying device for supplying segments one by one to an erector (segment assembling device) in a shield machine.

[0002]

2. Description of the Related Art When a tunnel is excavated by a shield machine, it is common to construct a segment wall as a support at an excavated portion. In this case, the segments are transported from the rear (such as a shaft) to the rear of the excavator using a conveyor or the like, and are gripped one by one by an erector (ie, a segment assembling device) and transported to each construction site in the tunnel. Each part is assembled to a cylindrical wall by fastening it to other segments with bolts and nuts.

[0003] The weight of each segment has increased with the increase in the diameter of the tunnel, and the work area has also increased.
In recent years, there has been a tendency to automate assembling of segments as much as possible for the purpose of efficiently and safely performing construction. That is, means to automate the movement of the erector,
Various devices for mechanically fastening segments have been developed. Some proposals have already been made and some of them have been put into practical use as to a segment feeder for automatically feeding segments transported from behind to an erector one by one. In order for the erector to automatically grasp the segment, it is important to always supply the segment from the segment supply device to the erector at the same position with high accuracy.

The apparatus shown in FIGS. 4 and 5 is an example of such a conventional segment supply apparatus. FIG.
In the apparatus described above, the supply means 30 places the segment A carried out to the forefront by the conveyor 7 on the leading end of the delivery frame 31, positions the segment A together with the frame 31 by the lifting / lowering means 32, and moves the segment A together. By pushing forward at 33, it is presented just below the erector 5. The ejected segment A is gripped by the erector 5 and assembled on the cylindrical wall B as described above inside the outer cylinder 2 of the shield machine (behind the shield jack 3). In the apparatus of FIG. 5, the segments A are carried one by one by the hoist 39 from the rear to immediately behind the erector 5, and the telescopic cradle 41 receives the segments A and moves to a position directly below the erector 5. The cradle 41 is usually arranged at a front position that does not hinder the operation of the erector 5 for turning / expanding and assembling the segments, but extends to the rear of the erector 5 to receive the segment A, and receives the segment A. Thereafter, the segment A is slightly shrunk and the segment A is transported directly below the erector 5.
In both cases of FIGS.
The reason that the segment A is transported to just below is that it is not easy due to the structure of the erector 5 to place the segment A in another position and move the erector 5 in the longitudinal direction of the tunnel to get it. This is because the time required to change the position of the erector 5 impairs the speed of operation. The illustrated device is disclosed in Japanese Unexamined Patent Publication No. 5-1798.
No. 98 and JP-A-6-108799.

[0005]

The conventional segment supply apparatus shown in FIGS. 4 and 5 has room for improvement in the following points.

[0006] A) In principle, it is difficult to secure the positioning accuracy of the segments when the segments are inserted into the erector. The position of the segment when supplying to the erector 5 is determined by the delivery frame 31 (or to the erector 5) in the tunnel.
(FIG. 4) or the position of the receiving frame 41 (FIG. 5) is fixed, and the delivery frame 31 and the receiving frame 41 are fixed.
This is because the accuracy of the segment A is determined by determining the position of the segment A in two steps. In other words, if the positioning of the moving body in the overall coordinate system and the positioning of the segment A in the partial coordinate system of the moving body are not performed with high accuracy, the required accuracy cannot be maintained.

[0007] (b) The positioning accuracy of the segments described above is difficult to ensure because the delivery frame 31 and the receiving gantry 41 tend to bend. That is, in the apparatus shown in FIG. 4, a sensor and a means for moving must be arranged on the delivery frame 31 in order to accurately determine the position of the segment A. As a result of the addition of the weight of the device for positioning the segment A together with the segment A in the vicinity, the frame 31 bends and the position accuracy of the segment A is likely to decrease. Further, in the apparatus shown in FIG. 5, it is necessary to insert the segment A into the hoist 39 in a state where the segment A is positioned or to insert the segment A on the tip of the hoist 39 and position the segment A. Hoist 3
9 is obviously not easy, and if the positioning is performed on the receiving gantry 41, the weight of the segment A as well as the locating equipment and the like is added to the vicinity of the distal end thereof, and as a result, the receiving gantry 41 is bent. Thus, the positional accuracy is reduced as in the apparatus of FIG.

(C) If the positioning accuracy of the segments is to be ensured in consideration of the above (b), the size of the apparatus becomes structurally large. That is, in the case of the apparatus shown in FIG. 4, the delivery frame 3 is inserted from the rear to just below the erector 5 (so as not to contact the erector 5).
1 has a long tip, and supports the segment A and the like in a so-called cantilever state with a long arm, but the frame 31 is not bent by the weight of the segment A and the positioning device and moving means. In such a case, it is necessary to provide a considerable rigidity, and the frame 31 becomes large. When the frame 31 is large, the rigidity of the fixed frame 34 and the like that support and move the frame 31 also requires high rigidity, and the entire supply means 30 becomes large. Such an increase in size as a whole increases costs and makes it naturally difficult to incorporate the device into a small-diameter shield machine. In the apparatus of FIG. 5 as well, the receiving base 41 of the segment A supports the segment A with a long cantilever arm extending from the front of the erector 5 to the rear of the erector 5, so that the deflection is reduced and the positioning accuracy is improved. Requires considerable rigidity, and the size in the vertical direction becomes large. In addition, in the case of the apparatus of FIG.
Since the two-stage telescopic structure is adopted, the structure of the apparatus is more complicated.

As a conventional segment supply device, besides the above-mentioned publications, Japanese Patent Laid-Open Publication No.
No. 8800 is disclosed. However, the former has a delivery frame similar to that of the apparatus in FIG. 4 and has the same problem as the above-mentioned a) to c) because the segment positioning method is also the same. The latter device transfers the segments directly from the hoist to the erector, but since the hoist must position the segments at the time of delivery, the position accuracy can still be improved without the assistance of workers. It is difficult to secure.

An object of the present invention is to make it easy to secure the positioning accuracy of the segments when supplying to an erector, to make the apparatus compact, and to easily incorporate it into a small-diameter excavator. It is an object of the present invention to provide a segment feeder having the advantages of (1).

[0011]

According to the present invention, there is provided a segment supplying apparatus for causing an erector of a shield machine to grasp segments one by one, and a) a segment supplying means for carrying the segments mounted thereon. From the back to below the erector (particularly means for gripping the segments), and b) to a fixed position on the erector to position the segments carried under the erector on the supply means. The moving position adjusting means is attached to the erector. The segment supply means a) may be different from the above-described conveyor or the like that transports the segments from the rear shaft section or the like, but may also serve as the same. “Gripping” as described above is a broad term indicating that the erector device has a segment or a support, and also includes simply supporting the device in a hanging state. In addition, “front” and “rear” in “rear” described above and “front” described in other places refer to front and rear in the traveling direction of the shield machine (the same applies hereinafter).

According to the first aspect of the present invention,
After the segment supply means of the above a) transports the segment to a substantially correct position under the erector, the position adjustment means of b) performs positioning of the segment on the supply means, so that the erector grips. Can be accurately determined. In this regard,
Actions are as described in 1) to 4).

1) The position adjusting means of the above b) moves the segment to a fixed position relative to the erector by moving itself (or a part thereof) to a fixed position in the erector, thereby positioning the segment. . If the above-mentioned fixed position, which is the movement destination of the position adjusting means, is appropriately determined, the position of the segment (the above-mentioned fixed position) determined thereby can be set as the optimum position for the erector to grip. . The position adjusting means is attached to the erector, and the means for gripping the segment is of course also provided at a fixed position on the erector. Is a fixed position for the gripping means. In addition, as long as the position adjusting means is attached to the erector, it is very easy to configure (a part of) the means to move to a fixed position in the erector. This is because, for example, a hydraulic or electric actuator having a constant moving amount of the operating part may be fixedly arranged on the erector.

2) The two-stage positioning (a), which was required in the prior art, is unnecessary, and the accuracy of the position of the segment is secured by one simple positioning.
This is because the position adjusting means of b) is attached to the erector similarly to the means for gripping the segment, so that it is not necessary to determine its overall position in advance. That is, even if the position of the position adjusting means in the global coordinate system (that is, with respect to the tunnel or the shield excavator) (and therefore the position of the erector including it) is not accurately determined, the position in the erector (that is, as it were) Simply moving the position adjustment means to the appropriate home position (in the partial coordinate system) will provide the segment with the correct position for the erector.

3) It is not necessary to dispose sensors that require high precision for positioning the segment and positioning the erector for gripping the segment.
Since the position adjusting means of b) is attached to the erector,
In order to move the (part of) means to a fixed position in the erector, it is sufficient to use a constant amount of movement, there is no need to use sensors, and the means positions the segment to a fixed position in the erector. This is because it is not necessary to accurately determine the position of the erector.

4) The segment supply means of the above a) supports the weight of the segment to be inserted into the erector, but does not need to be provided with a device for positioning the segment, so that the deflection generated in the supply means is small. That is, in this apparatus, the segment positioning accuracy is high also because the displacement of the segment due to the deflection of the supply means is small. Since the supply means of the above a) may supply the segment within a range in which the position adjustment means of the b) can function, devices such as a moving means and a position sensor for changing or rotating the position of the segment are arranged thereon. Therefore, the weight acting on the device is small. If the working weight is small, the supply means of a) can be made compact, and it can be easily incorporated into a small-diameter shield machine.

The segment feeder according to the second aspect is, as a part of the position adjusting means of the above b), a drive body which moves from the front to a fixed position near the lower center of the erector and pushes the segment. A plurality of (one driving body) are arranged on the erector at intervals on the left and right. The “left and right” and “left” and “right” described below refer to left and right with respect to the traveling direction of the shield machine (the same applies hereinafter).

In the feeding device according to the second aspect of the present invention, the driving body moves from the front to a fixed position near the center of the lower part of the erector and pushes the segment to adjust the position of the segment in the front-rear direction. Can be performed as follows. If the position of the movement destination of the driving body is fixed, the position in the front-rear direction after the movement of the segment determined thereby can be optimized for the erector to grip. In addition, in the supply device according to the second aspect, the driving elements are arranged at a plurality of positions spaced apart from each other on the left and right, and the positions are similarly determined at a plurality of points in the segment by using the driving elements. Not only the point but also the position in the front-rear direction can be determined for all points, and as a result, the yaw displacement of the segment can be corrected.

The function as described above is such that the segment supply means of the above a) always inserts the segment slightly forward of the normal position, and the driving body moves the segment from the front toward the lower center of the erector. This can be realized by arranging the respective driving bodies so as to push them to the home position.
For this purpose, the supply means may be provided with a function of roughly positioning the segment, and the position of the movement destination of the driving body may be kept constant. Therefore, the supply device can be simply configured at low cost. .

The segment feeder according to a third aspect of the present invention is a drive unit for moving the segment from the left or right to a fixed position near the center of the lower part of the erector as a part of the position adjusting means of the above b) to push the segment. (2) One or more (second driving bodies) are arranged on each of the left and right sides of the erector.

According to the third aspect of the present invention, the (second) driver is moved from the left or right to a fixed position near the center of the lower part of the erector to push and move the segment, whereby the segment in the left and right direction is moved. Can be performed as in 1) above. If the position of the movement destination of the driving body is kept constant, the position after the movement of the segment (position in the left-right direction) determined thereby can be optimized for the erector to grip. . In the supply device according to the second aspect, since one or more of the driving bodies are arranged on the left and right sides, the position is optimal even when the segment placed on the segment supply means in the above a) is biased to the left or right. Can be In addition, the above-described functions are provided by providing the above-mentioned supply means with a function of roughly positioning the segments and making the position of the movement destination of the second driving body constant. Can be configured.

According to a fourth aspect of the present invention, there is provided the segment supply device, wherein
In the above-mentioned segment supply means, a support for fixedly mounting the segment and a support with a sphere, for example, for easily mounting the segment are arranged so that the vertical relationship between them can be changed.

In the apparatus according to the fourth aspect having such a segment supply means, the position of the segment (including the rotational displacement) can be corrected particularly smoothly. When the position adjusting means of the above b) moves the segment, if the segment is placed on the support with the sphere above, the position adjusting means can easily move the segment with a small force. It is. Then, after the position adjusting means corrects the position of the segment or the like, if the vertical relationship between the above-mentioned support with a sphere and the other support (the one on which the segment is fixedly mounted) is changed, and the latter is turned up, After releasing the function of the position adjusting means, the segment can be fixed and its position can be stabilized. When the position adjusting means functions when the longitudinal direction of the tunnel is not horizontal or when the segment gripped by the erector is not at the lowest part in the shield machine, that is, when the support with a sphere supports the segment, In order to prevent the position of the segment from being shifted abruptly, some rotation resistance (the segment does not move abruptly, but is smoothly moved when it is pushed by the position adjusting means) is required. It is also preferable to provide a rotation resistance (a degree of rotation that moves).

[0024]

1 to 3 show an embodiment of the present invention. FIG. 1A is an overall rear view showing the erector 5 and the supply device 8 of the shield machine 1, and is a view taken along II in FIG. 2A, and FIG. 1A is a detailed view of a portion b, and FIG. 1C is a detailed view of a portion c in FIG. FIG. 2A is a side view showing the whole of the supply device 8 for the segment A together with the rear part of the shield machine 1, and FIG. 2B is a detailed view of a portion b in FIG. FIG. 3 is a plan view of the erector 5 and is a view taken along the line III-III in FIG.

As shown in FIG. 2A, the shield machine 1
Is surrounded by a cylindrical outer cylinder 2, and inside thereof is a shield jack 3 for providing forward propulsion.
Pipes and mud pipes (not shown) for discharging the ground and excavated earth and sand are arranged. Although not shown, a rotary cutter for excavating a face is provided at the forefront thereof. A so-called portal type (FIG. 1)
(see (a)), a cylindrical wall B serving as a support, for example, by grasping each single segment A before assembly with the erector 5 and moving it in the circumferential and radial directions. To assemble. The above-described shield jack 3 pushes the end face of the wall B assembled in this manner backward, thereby providing forward driving force to the excavator 1. Reference numeral 5a in FIG. 2 (a) is a column that is connected to the outer cylinder 2 and supports the erector 5 in the shield machine 1 in the tunnel. The work deck 6 is also attached as shown in FIG.

In the shield machine 1, the erector 5
As shown in FIG. 2A, a conveyor 7 and a segment supply device 8 are disposed at the rear of the shield machine 1 in order to automate the handling of the segment A until the segment A is supplied. From the rear shaft part (not shown) to the rear part of the shield machine 1 (the position where the supply device 8 is located), a segment is carried out using a conveyor 7 (not shown) or a hoist (the same), and further using a conveyor 7. A, and transported segments A are automatically supplied one by one by the supply device 8,
The positioning is performed to a regular gripping position immediately below the erector 5 (that is, the position of the segment A when the erector 5 grips at the original gripping position). Conveyor 7
A plurality of movable gantry 7a having a function of raising and lowering the mounting surface of the segment A are arranged along a fixed gantry arranged in the longitudinal direction of the tunnel, and the movable gantry 7a is mounted on the fixed gantry. It reciprocates back and forth while moving up and down. For example, all the movable bases 7a are advanced in a state where each mounting surface is raised and the segment A is mounted thereon, and thereafter, each mounting surface is lowered and the segment A is retracted in a state where the segment A is left on the fixed base. By repeating the procedure,
A large number of segments A (for example, a set for one ring covering 360 ° in a tunnel) can be conveyed forward by one stroke in a state of being arranged in the front-rear direction.

The feeding device 8 for feeding the segment A to the erector 5 is constituted by a feeding means 10 for the segment A and a position adjusting means 20 as shown in FIG. The feeding means 10 carries the segment A at the head on the conveyor 7 to a position almost directly below the erector 5, and the position adjusting means 20 positions the segment A on the feeding means 10 (including the rotational displacement). To correct. Each configuration is as follows.

First, the supply means 10 arranges the movable gantry 7a at the forefront of the conveyor 7 so as to be able to move below the erector 5 as shown in FIG. 2 (a). Support 13. 1 for segment A as in b)
4 is provided. The position of the segment A when it is placed on the gantry 7a of the supply means 10 and moved below the erector 5 is normal, so that the driving body 21F of the position adjusting means 20 described later can push the segment A backward from the front. To be slightly forward of the gripping position. In addition, the base 7a when moving under the erector 5
2A, a guide member 12 is attached below the work deck 6 as shown in FIG. 2A so that the position of the gantry 7a (therefore, the position of the segment A thereabove) is substantially a regular gripping position. It is guided to.

In the supply means 10, the support 13 is of a fixed type as shown in FIG.
Reference numeral 4 denotes an up-and-down type which can exchange the vertical relationship with the support 13. That is, the support 14
Has a plurality of (four or more) rotatable support bodies 16 with spheres mounted on an inclined table 15, and each of the support bodies 16 is placed inside a vertically long hole in a bracket 17 as shown in the figure. It is configured by connecting with a hydraulic cylinder 18 in which a pin is inserted and arranged. When hydraulic pressure is supplied to extend the cylinder 18, the two supports 16 rise together with the cylinder 18 along the slope of the inclined base 15, and the sphere comes to a position higher than the fixed support 13. Then,
Since the segment A rests on the support member 14, the segment A can be moved back and forth and left and right with a small force by the rotation of the sphere.
Conversely, when the cylinder 18 is contracted to lower the position of the support 14, the segment A rests on the fixed support 13 and the position is stabilized.

As shown in FIG. 3, the position adjusting means 20 pushes forward and left sides of the frame 5a of the erector 5 so as to press the surrounding surfaces (front, left and right sides) of the segment A.・ Drivers 21F ・ 21R ・ 2 on the right side
1L is arranged in pairs. As shown for the driving body 21R in FIG. 1 (c), the driving bodies 21F, 21R, 2
Each of 1L is a lever having two protrusions,
The center of swing is supported on the frame 5a, and one of the protruding portions is connected to a telescopic end of a hydraulic jack 22 (fluid pressure actuator). When the jack 22 is extended, its lever swings, and the other protruding portion becomes the segment A.
Will be pressed. Each drive 21F ・ 21R ・ 21
As described above, the height of L is determined by the support member 14 having a sphere (FIG. 2).
(b)) is determined as shown in FIG. 1 (a) in accordance with the height of the segment A placed on the supply means 10 when raised.
The segment A in that state can be pressed.

In the position adjusting means 20, two sets of driving bodies 21F arranged at the front part (left side in FIG. 3) of the frame 5a of the erector 5 as shown in FIG.
By pushing and moving the segment A on the 0 from the front, the position in the front-rear direction is optimized. As described above, when the supply means 10 supplies the segment A slightly forward of the normal position, each jack 22 is extended to swing both of the driving bodies 21F, so that each of the driving bodies 21F becomes the front end of the segment A. The segment A is moved backward by pushing the surface (that is, toward the lower center of the erector 5). When each jack 22 is fully extended, the driving body 21F holds the segment A in a regular gripping position (a position indicated by an imaginary line in FIG. 3; that is, as shown in FIG. If the position of the driving body 21F and the stroke of the jack 22 are set in accordance with the size of the segment A so as to move to the position just below 5u), the position adjustment of the segment A in the front-rear direction is extremely easy. become. Also, two sets of driving bodies 2
Since the first floor 1F is arranged at an interval on the left and right, by adjusting the position of the segment A in the front-rear direction by them, the yawing displacement of the segment A (displacement appearing as a tilt in FIG. 3) can be simultaneously optimized. become.

On the other hand, each of the two sets of driving bodies 21R and 21L arranged on the left and right portions of the frame 5a of the erector 5 in the position adjusting means 20 divides the segment A on the supply means 10 into right and left sides. The right and left positions are optimized by pushing and moving. If the driving bodies 21R and 21L are set so that the driving bodies 21R and 21L move the segment A to the regular gripping position (described above) in accordance with the size of the segment A, the position of the segment A in the front-rear direction is set. Can be easily adjusted.

The deviation between the position of the segment A and the posture from the normal gripping position includes the above-described positions in the front-rear direction and the left-right direction and the yawing displacement, as well as the vertical position (ie, the position along the tunnel radial direction). And pitching displacement (that is, displacement appearing as a tilt in FIG. 2 (a))
However, there is generally no need to perform a special positioning operation for the vertical position and the pitching displacement. This is because if the vertical movement stroke of the erector 5 has a margin for such a height variation, the variation within the margin is allowed. Therefore, rigidity for suppressing fluctuations in height is not particularly required.

In order to hold the segment A on the supply means 10, a holding means 5u is provided in the erector 5 as shown in FIG. 1 (b). The gripping means 5u attaches a gripping metal 5x to the lower end of the hydraulic cylinder 5v so as to be rotatable by the rotating means 5w, and engages the metal fitting 5x with the hole Ax of the segment A. The metal fitting 5x is a flat circular flat plate. When the metal fitting 5x is oriented as shown in the figure, the metal fitting 5x enters the hole Ax. However, when the metal fitting 5x is rotated by 90 ° around the axis of the cylinder 5v, it is impossible to enter and leave the hole Ax. become. Therefore, after extending the cylinder 5v from the state of the figure and inserting the metal fitting 5x into the hole Ax,
By rotating the bracket 5x by 90 ° by the rotating means 5w,
The erector 5 is in a state of holding the segment A. As described above, it is easy to move the segment A to the regular gripping position by operating the position adjusting means 20 (FIG. 3 and the like), thereby positioning the hole Ax directly below the gripping means 5u of the erector 5. After the positioning by the position adjusting means 20, the gripping means 5u can grip the segment A very smoothly. Position adjusting means 20
Can be performed by setting the stroke of the jack 22 or the like, and there is no need to particularly accurately determine the position of the erector 5 before and after that (the erector 5).
May be stopped at a position where the position adjusting means 20 can function with respect to the segment A to be supplied by the supply means 10).
Therefore, it is not necessary to arrange a special position sensor for positioning and grasping the segment A.

The supply device 8 described above is used for the erector 5
Is as follows. That is, the supply means 10 places one of the segments A transported from behind by the conveyor 7 of FIG. At this time, the position of the segment A is slightly forward of the normal gripping position by the erector 5, and the accuracy of the position and the posture is not high.

The erector 5 turns and reaches above the segment A as shown in FIG. The stop position of the erector 5 at this time may be any position at which the position adjusting means 20 can function with respect to the segment A.

When the support 14 with a sphere is lifted and the segment A is placed on the supply means 10 in FIG. 2B, the position adjusting means 20 in FIG. 3 moves the segment A to the regular gripping position in that state. I do. At this time, the position adjusting means 20 extends the jacks 22 so that the driving bodies 21F
・ Supply means 1 by swinging 21R and 21L.
Push and move the segment A on 0 from the front, right, and left to the normal gripping position. With the positioning in the front-back direction and the left-right direction, the yaw displacement of the segment A is also corrected.

When the positioning of the segment A is completed as described above, the erector 5 grips the segment A by lowering the gripping means 5 u shown in FIG. 1B and moves it to a predetermined construction position in the tunnel. I do. In addition, after the positioning of the segment A and before the gripping means 5u descends, the above-mentioned support 1 is supplied to the supply means 10 in FIG.
It is also possible to transfer the segment A from 4 onto the fixed support 13.

Although one embodiment of the present invention has been described above, it goes without saying that the present invention can be implemented in other embodiments. For example, as the position adjusting means 20, a plurality of driving bodies configured in the same manner as the driving body 21F may be arranged only on the rear portion of the frame 5a of the erector 5, or the driving body may be symmetrical in both front and rear together with the front driving body 21F. Can also be arranged. Also, the position adjusting means 20
May be mounted on the shield machine 1 other than the erector 5. Driver 21F
Since both the erector 5 and the erector 5 are on the shield machine 1, as long as the stop position of the erector 5 in the front-rear direction with respect to the shield machine 1 is fixed, the position of the segment A to be supplied to the erector 5 also in this case. Can be easily and accurately performed.

[0040]

The segment feeder according to the first aspect has the following effects. 1) Since the position adjusting means positions the segment by moving to a fixed position in the erector, this supply device can supply the segment to a position optimal for the erector to grip.

2) Since the position adjusting means is attached to the erector, the arrangement for positioning the segment at a predetermined position on the erector as described above can be extremely simplified by the means.

3) Since it is not necessary to arrange high-precision sensors for positioning the segment and positioning the erector for gripping the segment, the apparatus is constructed at low cost and has a low functioning function. Excellent quickness and stability.

4) Since the segment supply means is lightweight and causes little deflection, segment positioning accuracy is also high.

5) Since the segment supply means can be made compact, it is easy to incorporate this device into a small-diameter shield machine.

The segment supply device according to the second aspect of the present invention further includes: 6) the positioning of the segment with respect to the longitudinal position and the yawing displacement can be completed by a very simple operation of moving a plurality of driving bodies. . There is also an advantage that it is easily configured at low cost.

According to the third aspect of the present invention, the segment can be positioned in the left-right direction by the very simple operation of the driving member. It also has the advantage that the device is low-cost and simple to construct.

According to the fourth aspect of the present invention, the segment supply device includes a fixed support and a support with a sphere, so that the position of the segment (including the rotational displacement) can be corrected particularly smoothly, and , The positions of the segments can be stabilized.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating one embodiment of the present invention. FIG. 1A is an overall rear view of the erector 5 and the supply device 8 of the shield machine 1, and is a view taken along a line II in FIG. 2A, and FIG. 1A is a detailed view of a portion b, and FIG. 1C is a detailed view of a portion c in FIG.

FIG. 2A is a side view showing the entirety of a supply device 8 for a segment A together with a rear portion of the shield machine 1;
(b) is a detailed view of a part b in (a).

FIG. 3 is a plan view of the erector 5 and is a view taken along the line III-III in FIG. 2 (a).

FIG. 4 is a side view showing a conventional segment supply device.

FIG. 5 is a side view showing another conventional segment supply device different from FIG. 4;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 shield excavator 5 erector 5 u gripping means 8 segment supply device 10 supply means 13.14 support 20 position adjustment means 21F / 21R / 21L driver A segment

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E21D 11/40

Claims (4)

(57) [Claims] Claims 1. A supply device for causing an erector of a shield machine to grasp segments one by one, wherein a segment supply unit for carrying the segment mounted thereon is arranged from the rear to below the erector. A segment supply device, wherein a position adjusting means for moving a segment carried under an erector to a fixed position in the erector is attached to the erector. 2. As a part of the position adjusting means, a plurality of driving bodies which move from the front to push a segment to a fixed position near the center of the lower part of the erector and are arranged on the erector at right and left intervals. The segment supply device according to claim 1, wherein 3. A part of the position adjusting means, in which one or more driving bodies which move from the left or right to push the segments to a fixed position near the center of the lower part of the erector are arranged on each of the left and right sides of the erector. Claim 1 characterized by the following:
Or the segment supply device according to 2. 4. In the segment supply means, a support for fixedly mounting the segment and a support with, for example, a sphere for easily mounting the segment are arranged so that the vertical relationship between them can be changed. Claim 1
3. The segment supply device according to any one of 3.