JP2971402B2 - 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 apparatus for supplying segments one by one to an erector (segment assembling apparatus) at the rear of 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.

The apparatus shown in FIGS. 5 and 6 is an example of such a conventional segment supply apparatus. FIG.
In the apparatus described above, the delivery unit 30 transfers the segment A transported to the forefront by the conveyor 8 to the delivery frame 31.
And lift the segment A together with the frame 31 by the elevating means 32 and advance it forward by the horizontal moving means 33.
To just below. The ejected segment A is gripped by the erector 6, and is assembled to the cylindrical wall B as described above inside the tail plate 3 which is the outer cylinder of the shield machine (behind the shield jack 4). In the apparatus of FIG. 6, the segments A are carried one by one by the hoist 39 from the rear to immediately behind the erector 6, and the telescopic cradle 41 receives the segments A and moves to a position directly below the erector 6. The cradle 41 is usually arranged at a position in front of the erector 6 that does not hinder the operation of the erector 6, but extends to the rear of the erector 6 to receive the segment A, and then contracts slightly and then receives the segment A. A is carried directly below the erector 6. FIG.
The reason why the supply device transports the segment A to a position directly below the erector 6 in any of the cases in FIG. 6 is that the segment A is placed at other positions and the erector 6 is moved in the longitudinal direction of the tunnel so as to move it. Going to get
This is because the structure of the erector 6 is not easy, and it takes time to change the position of the erector 6, which impairs the speed of operation. The apparatus shown in FIG.
No. 898 and JP-A-6-108799.

[0005]

The conventional segment feeder shown in FIGS. 5 and 6 has room for improvement in the following points.

[0006] a) The apparatus becomes structurally large. That is, in the case of the device of FIG. 5, from the rear to directly below the erector 6 (so as not to contact the erector 6).
Since the delivery frame 31 has a long distal end in order to insert the segment A, and supports the segment A in a so-called long cantilever state, the frame 31 needs to have rigidity not to be deflected by its weight. In particular, the vertical dimension) becomes large. Further, the frame 3
Since the whole 1 is pulled up and horizontally moved considerably forward, a high rigidity is required also for the fixed frame 34 and the like that support them, and the portions other than the delivery frame 31 are difficult to be compactly configured. In the apparatus of FIG. 6 as well, the cradle 41 of the segment A supports the segment A in a cantilevered state with a long arm extending from the front of the erector 6 to the rear of the erector 6, and therefore requires considerable rigidity.
The size in the up-down direction becomes large. The point that the receiving gantry 41 has a two-stage expansion / contraction structure for the purpose of increasing the expansion / contraction distance also complicates the structure of the device. When the size of the supply device is increased, it is naturally difficult to incorporate it into a small-diameter shield machine.

(B) The efficiency of the segment assembling work must be reduced. When the vertical dimension of the delivery frame 31 (FIG. 5) or the receiving base 41 (FIG. 6) is increased as in the above-mentioned a), the position (supply position) at which the segment A is passed to the erector 6 is increased. This is because the erector 6 has to move a considerable distance in the radial direction of the tunnel every time after receiving the, before transporting it to each construction position.

(C) It is difficult to secure the positioning accuracy of the supplied segments. That is, the delivery frame 31 (FIG. 5) and the receiving stand 4 are used to solve the above-mentioned problems a) and b).
1 (FIG. 6), if it is made small, the frame 31 or the like bends based on the weight of the segment A or the like.
The accuracy of the position of the segment A at the time of passing over to the erector 6 is reduced. In particular, in the apparatus shown in FIG. 6 in which the receiving gantry 41 has a two-layer structure, if the supply position of the segment A is to be lowered as compared with the single-layer structure, the gantry 41 becomes thinner. It becomes impossible to provide positioning means.

An object of the present invention is to provide a segment feeder which can be easily incorporated into a small-sized and small-diameter excavator, can promote efficient assembly of segments by an erector, and has high segment positioning accuracy. That is.

[0010]

According to a first aspect of the present invention, there is provided a segment supplying apparatus for supplying a segment to an erector one by one, comprising: First supply means for carrying and pushing it towards a position directly below the erector; b) extending from the front of the erector to a position directly below the erector to receive a segment from the first supply means and to position the segment. Combine with the second supply means for clogging , and c) assemble the second supply means on the rearwardly facing tip.
Also provided support point for grounding on the inner peripheral surface of Zumi segment
It is. The first supply means may be different from the means for transporting the segments from the rear as described in the above a), but may also serve as the transport. Note that the term "just behind the erector", to which the first supply means carries the segments one by one, and the term "front of the erector", which is located before the second supply means receives the segment, refer to the erector for assembling the segments. Means the "back" or "front" as close as possible to the erector within a range that does not hinder the operation (particularly, operation below).

In the apparatus according to the first aspect, neither the first nor the second supply means needs to support the segment in a long cantilever state as in the apparatus shown in FIGS. . That is, first, the first supply unit supplies the segments from the rear similarly to the apparatus of FIG. 5, but as described above in a),
It does not carry the segment directly below the erector. Therefore, even if care is taken not to contact the erector, it is not necessary to make the tip of the lower frame as long as in FIG. Further, the second supply means extends from the front and mounts the segment as in the apparatus of FIG. 6, but extends to a position immediately below the erector and does not need to extend to the rear thereof. Even if the second supply means supports the segment in a cantilevered state, its arm length is shorter than in the device of FIG.

Since there is no need to support the segment with a long cantilevered arm, the first and second supply means are both made compact. This is because the arm portion supporting the segment can be configured to be small and light because bending and the like are unlikely to occur, and it is not necessary to provide a high rigidity to the fixed side portion supporting the arm or the like. . When the arm is stretched for a short distance, there is no need to take a two-stage telescopic structure as in the apparatus shown in FIG. 6, so that the configuration is simplified, and in that sense, the supply device is compact. When the size is reduced as described above, it is easy to incorporate the supply device into, for example, a small-diameter shield machine.

As described above, each supply means is made compact, and especially when the vertical dimension of the arm portion of the second supply means is reduced, the supply position of the segment is lowered (that is, the supply position of the segment is located far from the center of the tunnel). ), The efficiency of the segment assembling operation can be improved. When the feeding position, that is, the position where the device passes the segment to the erector, is lowered, the tunnel is taken after the erector receives it and transports it to each construction site (close to the inner surface of the tunnel and far from the center of the tunnel). Since the distance that must be moved in the radial direction is reduced, the assembly of the segments is streamlined. In this apparatus, since the segments are supplied to a position directly below the erector, the distance that the erector moves in the axial direction of the tunnel after the segment is received and before it is transported to the construction site is minimal.

In addition, since the first and second supply means hardly bend as described above, this apparatus can also improve the positioning accuracy of the supplied segments. In particular, instead of the first supply means for placing the segment first and pushing it forward, the second supply means for receiving the segment at a position directly below the erector, which is the supply position, positions the segment. Can be made reasonably high.

[0015] For the second supply means, for the elongation of the rear as described above is not large, but may be supported segments by arms have a so-called strip, wherein
In the device of Item 1 , a support point is provided at the rearwardly-facing end of the second supply means as described in c) above.
You. Providing such a support point at the rearwardly-facing tip allows the second supply means extending from the front to be supported from both the front and the rear. The second supply means having a structure supported from front and rear is more advantageous in terms of strength in that it is less likely to bend and the like, so that the arm portion and the like can be made smaller. In addition, if the second supply means is small and does not easily bend, the supply device can increase the positioning accuracy of the segments at the time of supply and can increase the efficiency of the segment assembling work for the above-described reason. It is.

[0016] To a positioning direction (rotation axis around which faces vertical) longitudinal and yawing for segment supplied to erector, as set forth in claim 2, within the second supply means, It is preferable to provide a stopper against which the front end of the segment extruded from the first supply means is pressed. The segment is extruded from the first supply means, so that the second
If the second supply means has the above-mentioned stopper, the position of the segment in the above direction is determined by hitting the stopper if the second supply means has the above-mentioned stopper.

[0017] To the positioning of the segments in the circumferential direction of the tunnel, as described in claim 3 or 4, while the second supply means, placed segments so move freely in the same direction It is preferable to provide a free roller and a claw that moves and stops the segment in the same direction and that can retreat under the mounting surface of the free roller. After the segment is placed on such a free roller, the segment is moved to an appropriate position by the pawl and stopped, whereby the position of the segment can be determined and the position can be maintained. After the segment on the free roller thus positioned is gripped by the erector, the claw is preferably retracted below the mounting surface. If the claw remains protruding, the erector cannot move in the circumferential direction of the tunnel unless the segment is lifted above the height of the claw, but if the claw retracts, the erector will immediately move in the circumferential direction. This is because they can be moved and the assembly of the segments can be streamlined.

[0018]

1 to 4 show an embodiment of the present invention. FIG. 1 is a side view showing the whole of the supply device 7 for the segment A together with the shield machine 1 and the like.
FIG. 3 is a cross-sectional view of a main part of the supply device 7 as viewed from the side, and FIG. 3 is a cross-sectional view and a plan view of one of the tables 21 viewed from the rear (FIGS. 3A and 3B).
Is a cross-sectional view, and (c) is a plan view. FIG. 4 is a longitudinal sectional view showing an outline of the shield machine 1.

As shown in FIG. 4, the shield machine 1 has a rotary cutter 2 at the forefront, and its periphery is covered by an outer cylinder including a tail plate 3. Inside the outer cylinder, in addition to the driving means for the cutter 2, a shield jack 4 for providing forward propulsion, and a mud feeder for sending muddy water to the foremost space facing the face to discharge excavated earth and sand. A pipe 5a, a drain pipe 5b, and the like are arranged. Further, an erector 6 is provided at the rear of the excavator 1, and a cylindrical wall B serving as a support is assembled by gripping and moving each single segment A before assembly with the erector 6. . The above-mentioned shield jack 4 pushes the end face of the wall B assembled in this manner backward, thereby providing forward driving force to the excavator 1.

In this example, in order to automate the handling of the segment A, as shown in FIG. 1, a conveyor 8 and a segment supply device 7 are arranged at the rear of the shield machine 1. Shield machine 1 from the rear shaft (not shown)
The conveyor A conveys the segments A to the rear, and the conveyed segments A are automatically supplied to the erector 6 one by one by the supply device 7. The conveyor 8 has a large number of running wheels 8b arranged below a conveyor body 8a including a conveyor belt.
The segment A can be transported by the conveyor main body 8a, and the main body 8a can be moved forward by the action of the traveling wheels 8b. Therefore, the transport destination of the segment A can be moved forward as the excavator 1 moves forward. it can.

The supply device 7 for transferring the segment A on the conveyor 8 to the erector 6 is constituted by a first supply means 10 and a second supply means 20, as shown in FIG. First
The supply means 10 picks up the segment A at the head on the conveyor 8 and the second supply means 20
Is received and placed at a predetermined position directly below the erector 6.

The first supply means 10 moves the rear table 11 so that one segment A is placed on the lower rear table 11 and then once moved up, moved forward and lowered to a predetermined height. The excavator 1 is attached to the attachment base 14 via the horizontal moving means 13 and the elevating means 12. The width of the conveyor 8 is smaller than the width of the segment A, and the rear table 11 has the mounting surfaces of the segment A on both sides and the front of the conveyor 8. After the segment A has reached the forefront, the table 11 is lifted by the elevating means 12 so that the segment A at the head of the conveyor 8 is picked up on the mounting surface of the table 11. Can be. Thus segment A
Is moved forward by the horizontal moving means 13 and lowered again by the elevating means 12 (see the imaginary line in FIG. 1), so that the segment A on the mounting surface is immediately adjacent to the erector 6. It can be placed behind (a position that does not hinder the turning movement of the erector 6). The elevating means 12 is such that the table 11 can be moved up and down by a telescopic mechanism including a hydraulic cylinder or the like.
Is for moving the elevating means 12 and the table 11 back and forth by a roller hung on the gantry 14 and its driving device. The elevating means 12 and the horizontal moving means 13 have a function of storing the position so that the rear table 11 is always at a fixed position immediately behind the erector 6 and is aligned with a front table 21 described later.

As shown in FIG. 2, the rear table 11 incorporates an extrusion jack 15 having a pusher 16 at its tip. When the jack 15 is extended when the rear table 11 has carried the segment A to just behind the erector 6 as described above, the segment A is moved directly below the erector 6 via the pusher 16 (the front table 21 described later).
Can be extruded. Pusher 16
Is connected to a tip fitting of the jack 15 via a pin. In the natural state, the pusher 16 is kept in the illustrated position by the weight balance of the pusher 16 itself, and when the segment A is pushed leftward in the figure, a part thereof does not hit the tip fitting and does not rotate clockwise. However, when the segment A conveyed by the conveyor 8 passes through the upper part from the right in the figure, it falls to the left around the pin and does not hinder the movement of the segment A.

As for the second supply means 20, as shown in FIG. 1, the front table 21 on which the segment A is placed is moved from the front of the erector 6 to directly below the erector 6 by a telescopic mechanism including a hydraulic cylinder 22. . The front table 21 is retracted forward of the erector 6 when the erector 6 turns downward for the assembly work of the segment A, but when the first supply unit 10 pushes out the segment A as described above. , Front table 21
Extends to the position directly below the erector 6 and its segment A
You will receive Both sides of the front table 21 are shield excavators 1 so that they do not tilt when moving back and forth.
Is restrained from above and below by the guide frame 23. A hydraulic jack 24 is attached to the front end of the front table 21 facing backward so that the leg is lowered on the inner peripheral surface of the wall B formed by assembling the segment A. Front table 2
When 1 is directly below the erector 6, the jack 24 is extended to a certain length and grounded on the wall B, thereby supporting a part of the weight of the segment A and the like. The front table 21 is required to be as compact as possible to reduce the height and the like, and to have a small deflection or the like even when the segment A is placed.
The support point for the load is provided not only in the rear part but also in the rear. In order to stably support the weight, the number of jacks 24 may be increased. A roller may be attached to the lower end of the jack 24 in order to improve the contact with the segment A. Further, in order to speed up the assembly work of the segment A, the front table 21 is always extended to a position directly below the erector 6 except when the erector 6 performs the assembly of the segment A below the tunnel. Is preferred.

In order to smoothly supply the segment A to the erector 6 and to improve the working efficiency without causing the erector 6 to move unnecessarily, the segment A is moved to a fixed position where it is easily gripped by the erector 6. It is preferable to put it. Therefore, the following configuration is adopted in the front table 21 of the second supply means 20 so that the placed segment A can be appropriately positioned.

First, two stoppers 28 are provided at the front of the front table 21, as shown in FIG. 2, for positioning in the front-rear direction and the yawing (rotation about the vertical axis). (In parallel with a space in the direction perpendicular to the plane of the drawing). The segment A extruded from the push-out jack 15 of the first supply means 10 is placed on the roller 21a of the front table 21 and the front end hits the stopper 28, whereby the position in the front-back and yawing directions is determined. .

In order to position the segment A in the rolling direction along the circumference of the tunnel, as shown in FIG. 3 (c), four free rollers 25 and a pair of claws 26 and 27 are provided on the front table 21. Is provided. The free roller 25
As shown in FIG. 3A, a lift jack 25a is attached to a lower portion of the roller by a roller rotatable around a pin facing the longitudinal direction of the tunnel. When the lift jack 25a is extended to a predetermined length after the segment A is pushed out of the first supply means 10 and moved onto the front table 21, the segment A is placed on the free roller 25, and is moved in the circumferential direction of the tunnel. Be able to move lightly. As for the claws 26, one of the claws 26 keeps the position constant (however, the position can be adjusted), while the other claw 27 connects the hydraulic cylinder 27a as shown in FIG. 3 (b). And can move left and right, that is, in the circumferential direction of the tunnel. Similarly to the free roller 25, lift jacks 26a and 27b are provided below the claws 26 and 27, respectively. When the segment A is placed on the free roller 25, the lift jacks 26a and 27b are extended to
If one of the claws 27 is brought close to the claw 26 by the hydraulic cylinder 27a,
At 7, the segment A can be pinched and the position of the segment A can be determined in the circumferential direction.

After the segment A whose position has been determined as described above is gripped by the erector 6, the lift jack 26a
・ Shrink 27b to lower claws 26 and 27. that way,
The erector can immediately move the segment A in the circumferential direction without ascending once, and can assemble the segments more efficiently. The stopper 28 shown in FIG.
Is located just below the normal position of the erector 6, and in principle, the erector 6 does not need to move in the axial direction (longitudinal direction) of the tunnel after the segment A is gripped. There is no waste of time associated with the movement.

[0029]

The segment supply device according to the first aspect has the following effects. 1) Since both the first and second supply means do not need to support the segment with a long cantilevered arm, the apparatus can be configured simply and compactly. When miniaturized, the feeder can be easily incorporated into small bore shield machines.

2) Based on the structural features shown in 1) above,
Since the segment supply position can be lowered by making the arm portion of the second supply means thin (that is, reducing the size in the vertical direction), the moving distance of the erector in the radial direction of the tunnel is shortened and the assembly efficiency of the segment is improved. Can be done.

3) Similarly, from the structural feature of 1), the first
Since the second supply means does not easily bend, it is possible to improve the positioning accuracy of the supplied segments. Since the second supply means positions the segment just below the erector supplying the segment, the improvement of the accuracy is rational and efficient.

4) Since the second supply means is supported from both front and rear sides, it is more advantageous in terms of strength such as being less likely to bend.
Thus, the above advantages 1) to 3) are more remarkable.

[0033] In the supply device according to claim 2, by a simple structure only provided a stopper of the second supply means,
Positioning in the front-back direction and the yawing direction can be performed.

In the device according to the third or fourth aspect , the segment can be positioned in the circumferential direction of the tunnel by a simple structure in which the free roller and the claw are provided in the second supply means. Since the claws can be retracted below the mounting surface, the erector can immediately start the movement for assembling the segments, which is preferable in terms of work efficiency.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention, and is a side view showing an entire supply device 7 for a segment A together with a shield machine 1 and the like.

FIG. 2 shows a rear table 11 of a first supply unit 10 and a front table 2 of a second supply unit 20 in the supply device 7 of FIG.
FIG. 2 is a cross-sectional view of the device 1 as viewed from the side.

3A and 3B are diagrams showing a front table 21 of the second supply means 20, FIG. 3C is a plan view, and FIG. 3A is a cross-sectional view as viewed from the rear (a-a cross-sectional view in FIG. 3C). (B) is also a cross-sectional view as viewed from the rear (a bb cross-sectional view in (c)).

FIG. 4 is a longitudinal sectional view showing an outline of the shield machine 1.

FIG. 5 is a side view showing a conventional segment supply device.

FIG. 6 is a side view showing another conventional segment supply device different from FIG. 5;

[Explanation of symbols]

 Reference Signs List 1 shield excavator 6 erector 10 first supply means 20 second supply means 24 jack (support point) 25 free roller 26/27 claw 28 stopper A segment

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Koichi Tanaami 1-3-1, Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries, Ltd.Kobe Head Office (72) Inventor Yosuke Ota 1-3-3, Kobe Kawasaki Heavy Industries, Ltd. Kobe Head Office (56) Reference Jiko 6-3917 (JP, Y2) (58) Field surveyed (Int. Cl. ⁶ , DB name) E21D 11/40

Claims (4)

(57) [Claims] 1. A device for supplying segments one by one to an erector disposed at the rear of a shield excavator, wherein a segment conveyed from the rear is carried one by one to a position immediately behind the erector, and is provided immediately below the erector. First supply means for pushing it toward the position, and extending from the front of the erector to a position directly below the erector to receive the segment from the first supply means;
Including a second supply means for the positioning of the segment
Seen, the second supply means, the distal end portion of the backward, assembled without
Segment feeding apparatus characterized by having a supporting point of grounding on the inner peripheral surface of the saw segment. 2. The segment in the front-rear direction and the yawing direction.
The second supply means is provided by the first supply
The front end of the segment extruded from the step is pressed
The segment supply device according to claim 1, further comprising a stopper . 3. Positioning of segments in the circumferential direction should be smooth.
In addition, the second supply means is segmented so that it can move in the same direction.
The segment in the same direction as the free roller on which the
It moves and stops, and the free roller
The segment supply device according to claim 1 , further comprising a claw that can be retracted below . 4. An element disposed at the rear of the shield machine.
This is a device that supplies segments one by one to the
One by one, and to the position directly below the erector
And a first supply means for pushing it out from the front of the erector to a position just below the erector.
Receiving the segment from the first supply means,
Second supply means for positioning the segment.
In order to position the segments in the circumferential direction, the second supply means mounts the segments so that the segments can be moved in the same direction, and the free rollers move the segments in the same direction to stop them and mount the segments by the free rollers. And a claw that can be retracted under the placement surface.