JPH0426036B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a novel segment automatic supply device that automatically supplies segments to a segment assembly device of a shield tunneling machine.

[Prior Art] Generally, a segment assembly device for assembling segments along the inner wall surface of an excavation hole is provided at the rear of a shield tunneling machine so as to be able to freely rotate in the circumferential direction.
Therefore, by simply supplying the segments to the assembly device, the segments can be easily transported to the desired location on the wall surface of the excavation pit and assembled.

[Problems to be Solved by the Invention] However, since the segments are very heavy (for example, a segment with an outer diameter of 5 m weighs about 2 tons), it is not easy to feed them to the segment assembly device. For this reason, in the past, a truck was used to transport the segment from the rear of the excavation shaft to the vicinity of the segment assembly device, and then a hoist or the like was used to lower the segment from the truck and transport it below the segment assembly device. was positioned and gripped by the segment assembly device.

However, even if a hoist or the like was used, the workers had to handle the segments directly, which had the drawbacks of poor work efficiency and a long time required to assemble the segments, as well as being dangerous. . It should be noted that a device has been proposed in which a conveyor having a delivery cart at the front end is connected to the guide ring of the segment assembly device to automatically supply segments (Special Publication No. 1973-
However, since this device is connected to a shield excavator, it becomes a burden on excavation and also becomes a hindrance to segment assembly.

[Object of the Invention] The present invention has been made to solve the problems of the prior art described above, and its purpose is to be able to quickly and accurately supply segments to a segment assembly device, and to reduce the load of excavation and the segment An object of the present invention is to provide an automatic segment feeding device that does not interfere with assembly.

[Summary of the Invention] In order to achieve the above object, the present invention provides a device for supplying segments to a receiving portion at the top rotational position of a segment assembly device provided in a shield tunneling machine, in which a device is provided in an excavation hole at the rear of the shield tunneling machine. a traveling trolley that is movably provided and has a segment conveying section along the upper longitudinal direction; and a traveling trolley that is movably provided at the front end of the traveling trolley toward the receiving section and guides the segments along the upper longitudinal direction. The present invention is characterized by comprising a delivery frame having a roller, a movable stopper provided at the front end of the delivery frame to lock the segment, and a pusher provided to the delivery frame to move the segment onto the receiving portion.

When the segment is conveyed onto the delivery frame by the segment conveying section, the pusher pushes the segment and pinches it between the movable stopper. When the delivery frame moves close to the receiving section with the segment fixed in this manner, the movable stopper is released and the segment is moved from the delivery frame onto the receiving section by the pusher.

In particular, since the traveling truck and the delivery frame are separated from the shield excavator, they do not interfere with the load of excavation or the assembly of segments.

[Example] An example of the present invention will be described below in detail based on the accompanying drawings.

As shown in FIG. 1, a segment assembly device 3 is provided at the rear part of the shield frame 2 of the shield tunneling machine 1 so as to be able to freely rotate along the circumferential direction thereof. This segment assembly device 3 has an annular swing ring 4 rotatably supported within the shield frame 2.
, a hanging beam 5 provided on this turning ring 4 so as to be movable in the radial direction, and this hanging beam 5.
It is mainly composed of a segment mounting table 6 provided in the segment mounting table 6. Particularly, the segment assembly device 3 is configured to receive the segment S with the segment mounting table 6 at the uppermost pivoted position, and the segment mounting table 6 at that position is placed at the receiving portion 7 of the segment S.
It consists of The segment mounting table 6 is configured to receive a single arcuate segment S with its concave surface facing down, and further includes a holding mechanism 8 for holding the received segment S.

The automatic segment supply device according to the present invention includes a segment conveyance device 10 that conveys the segments S to the receiving section 7 from the rear of the excavation shaft 9 with the concave surface facing down.

The inner wall surface of the excavation shaft 9 excavated by the shield tunneling machine 1 is covered with segments S assembled by the segment assembly device 3, and the inside of the excavation shaft (shaft) 9 divided by the segments S contains materials and excavated materials. Rails 11 for conveying earth and sand etc. with a trolley are laid via cross members 12. The segment conveyance device 10 is mainly composed of a long traveling carriage 13 that runs on the rails 11, and a segment conveying section 14 provided on the traveling carriage 13 along its longitudinal direction. As shown in FIG. 2, the traveling truck 13 includes a truck frame 15 having an opening 100 through which an excavated soil transport conveyor or the like can pass through approximately the center of the excavation shaft 9. A rolling wheel 16 is provided.

The segment conveyance section 14 has an underframe 17 formed on the trolley frame 15 continuously and substantially horizontally from its rear end to near the front end on the shield tunneling machine 1 side, and at a height substantially equal to that of the receiving section 7. As shown in FIGS. 3 and 5, rollers 18 are disposed at appropriate intervals in the longitudinal direction on both sides of the upper part of the underframe 17 to receive the segments S and move them smoothly.

These rollers 18 are made of a soft material such as synthetic resin so as not to damage the segments S.

In addition, a pair of left and right guide plates 19 that are continuous in the longitudinal direction are provided protruding from the upper center of the underframe 17.
The guide plate 19 is located at the center of the concave surface of the segment S.
An engaging portion 20 is formed in a convex shape to be engaged and guided between the two.

Incidentally, the engaging portion 20 of the segment S may be formed into a concave shape that is engaged with and guided by both the guide plates 19 instead of being convex.

As shown in FIG. 3, the central part of the front end of the underframe 17 extends forward, and a delivery frame 32 having a substantially U-shape in plan, which constitutes a frame of a segment delivery device 22 to be described later, is engaged with and detached from this extension part 21. freely engaged.

As a means for conveying the segment S supported on the underframe 17 via the rollers 18, a means is provided between the guide plates 17 at the tip end of the extending portion 21 and the rear end of the underframe 17, respectively. A driven sprocket 23 and a driving sprocket 24 are provided,
The upper chain part of the endless chain 25 that is stretched between these two sprockets 23 and 24 is shown in FIG.
As shown in Fig. 5 and Fig. 6, it touches the rear end of segment S and moves it forward (in the direction of the shield tunneling machine).
Feeding members 26 are provided at appropriate intervals. In particular, the feed member 26 is connected to the chain 25
is swingably attached to a pin 27, and a weight 28 is attached to the base end for biasing the distal end into an upright state.
is provided. When the feeding member 26 pushes the rear end of the segment S, the weight 28 engages with the lower surface of the chain 25 and does not fall down, but as shown in FIG. When the segment S is hit, it falls forward to allow the segment S to pass. In addition, 2
Rollers 9 are provided at appropriate intervals on both sides of the chain, and are supported by guide grooves 30 on both sides.

The chain 25 is intermittently rotated back and forth, so that the forward movement of the sending member 26 sends the segment S forward, and the backward movement passes under and behind the following segment S, leading to the next forward movement. The segment S is then sent forward. _M1 is a motor that drives the drive sprocket 24.

Segment conveyance device 10 configured as described above
The traveling carriage 13 is placed at a predetermined distance L from the segment assembly apparatus 3 so as not to interfere with the turning and assembly operations of the segment assembly apparatus 3. Then, from the unloading end of the segment conveying device 10 to the receiving section 7 of the segment assembly device 3,
A segment delivery device 22 is provided at the front end of the traveling carriage 13 in order to deliver a single segment S while regulating its position.

The segment delivery device 22 consists of a truck with wheels 33 attached to the lower part of a delivery frame 32, and these wheels 33 are supported on a rail 34 provided between the front end of the traveling truck 13 and the underframe 17. There is. In particular, the front end of the delivery frame 32 extends further forward than the front wheels 33, so that when the delivery frame 32 moves to the frontmost position, it crosses the distance L and approaches the receiving section 7. There is.
Note that stoppers 35 are formed at the front and rear ends of the rail 34.

The delivery frame 32 is formed to have approximately the same width and height as the underframe 17, and has rollers 38, which are the same as the rollers 18, provided at appropriate intervals on both sides of its upper part, and is connected to the guide plate 19 in the center. A guide plate 39 having the same configuration is provided.
Further, as a means for reciprocating the delivery frame 32, the underframe 17 is provided with a cylinder 36,
The tip of the piston rod 36a is connected to the delivery frame 32. Further, the delivery frame 32 is provided with a pusher 40 for transferring the segment S placed on the roller 38 to the receiving section 7, and a pusher 40 is provided at the front end of the delivery frame 32 to prevent the segment S from falling during transportation. A movable stopper 41 is provided so as to be freely retractable upward via a cylinder 42.

As shown in FIGS. 4 and 7, the pusher 40 has a running section 43 that is located inside the rollers 38 on both sides and is movable along the longitudinal direction of the delivery frame 32, and a running section 43 that is connected to the running section 43. It is mainly composed of a push rod 45 provided upwardly via a parallel link 44 so as to be freely retractable. The push rod 45 is supported on and parallel to the delivery frame 32 and extends forward from the running section 43. A spring 46 that pulls the parallel link 44 rearward is attached to the running portion 43, and a stopper 47 that abuts and holds the parallel link 44 in an upright state against the spring force is provided. When pushed by S, the parallel link 44 falls forward against the spring force, and the push rod 45 is lowered to allow the segment S to pass. The running section 43 has rollers 50 on both sides, and these rollers 50 are movably engaged with guide grooves 51 provided in the delivery frame 32. As a means for reciprocating the traveling section 43, screw rods 52 are disposed on the delivery frame 32, located below and parallel to the guide groove 51, and screwed onto the screw rods 52 in the parallel section 43. A nut portion 53 is provided. A motor M ₂ is provided at the front end of the delivery frame 32 to rotate the screw rods 52 , and the motor M ₂ and the screw rods 52 are connected to a chain 54 .
are connected via.

On the other hand, the pusher 4 is mounted on the segment mounting table 6.
A roller 48 made of the same material as the roller 18 that movably supports the segment S pushed out by the roller 18.
is provided, and the engagement groove 20 of the segment S is provided.
A guide plate 49 is provided to engage and guide the. In addition, a pusher 4 is mounted on the segment mounting table 6.
A stopper 55 is provided for stopping the segment S pushed out by 0 at a fixed position.

Next, we will discuss the effect.

The segment conveyance device 10 follows the propulsion of the shield excavator 1 and travels from the segment assembly device 3 for a predetermined distance L. The segment conveyance section 14 is driven by a motor _M1 , and a chain 25 is intermittently rotated back and forth, thereby transporting a feed member 26.
make it reciprocate back and forth. In this state, the underframe 1, which is the carry-in end 14a of the segment conveyor 14,
When the segment S is placed on the upper rear end of the segment S, the feeding member 26 advances to send the segment S forward, and the next feeding member 26 moves backward to pass the lower part of the segment S and go around the rear part of the segment S. By repeating the cycle of moving forward again,
Segments S will be sent forward in sequence.

At this time, the delivery frame 32 of the segment delivery device 22 is connected to the discharge end 14b of the segment transport section 14 and is on standby, and the pusher 40 is in a waiting state where it has been sent to the rearmost position. In this state, when the segment S is sent, the pusher 40 first collapses under the pushing force of the segment S, allowing the segment S to pass, and the segment S goes beyond the pusher 40 and moves forward of the sending member 26. It will be sent by. At this time, a stopper 41 at the front end of the delivery frame 32 is projected to prevent the segment S from falling. Once the segment transport section 14 has supplied the single segment S to the delivery frame 32, it stops operating until the delivery frame 32 delivers the segment S to the receiving section 7 and returns.

Once the segment S is placed on the transfer frame 32, the pusher 40 is moved forward by the rotation of the screw rod 52, and the segment S is placed on the pusher 4.
0 and the stopper 41 to fix it. The segment delivery device 22 waits in this state until the segment mounting table 6 of the segment assembly device 3 completes the assembly of the preceding segment and returns to the receiving section 7.

When the segment mounting table 6 returns to the receiving part 7, the segment transfer device 22 moves forward by the drive of the cylinder 36, fills the gap L between the segment assembly device 3 and the segment transport device 10, and assembles the segment S. It is designed to facilitate delivery to the receiving section 7 of the device 3. Next, after retracting the stopper 41, the pusher 40 is advanced to push out the segment S until it comes into contact with the stopper 55 of the receiving section 7, as shown in FIG. 8, thereby completing the delivery of the segment S. When the delivery of the segment S is completed, the pusher 40 and the segment delivery device 22
At the same time, the stopper 41 is protruded and returned to the original standby position, and the operation of the segment conveying section 14 is restarted.The segments S are sequentially accurately supplied to the segment assembly device 3 by following the same procedure, and the segments are assembled. It can be used for continuous assembly work.

Note that when excavating a curved excavation shaft, the axes of the guide plate 49 of the receiving section 7 and the guide plate 39 on the delivery frame 32 are misaligned. It may be configured so that the position can be freely changed on the trolley 13.

In the embodiment, the feed member 26 is attached only to the upper side of the chain 25 to rotate the chain back and forth, but the feed member 26 may be attached to the entire chain 25 to rotate the chain 25 in the same direction. In this case, it is preferable to reduce the height of the segment conveying section 14 by folding the feeding member 26 at the lower side of the chain 25. Furthermore, the height of the segment conveying section 14 can be further reduced by using a linear chain instead of an endless chain and connecting cylinders to both ends of the chain to cause the chain to reciprocate.

In the embodiment, the pusher 40 is made to protrude and retract using the parallel link 44, but as shown in FIG. 9, the pusher 40 is configured with a swing link 60 and a weight 61 is provided at the rear end, so that the front end can be retracted. It may be configured as follows.

[Effects of the Invention] In summary, the present invention exhibits the following excellent effects.

(1) The segment conveyed onto the delivery frame by the segment transport section is sandwiched and fixed between the pusher and the movable stopper, and in this state, the delivery frame is moved closer to the receiving section, the movable stopper is released, and the pusher is moved. Since the segment is moved onto the receiving part by the above-described method, the segment can be fed quickly and accurately.

(2) In particular, since the traveling carriage and the delivery frame are separated from the shield excavator, they do not interfere with the load of excavation or segment assembly.

[Brief explanation of drawings]

FIG. 1 is a side view of an automatic segment feeding device showing an embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a plan view of the same, FIG. 4 is an enlarged front view of a segment delivery device, and FIG. The figure is an enlarged front view of the segment conveyance unit, Figure 6 is a side view of the same main part, Figure 7 is a side view of the pusher of the segment delivery device, Figure 8 is a side view showing the segment delivery situation, and Figure 9 is a side view of the segment transfer unit. It is a side view which shows the modification of a segment feeding member. In the figure, 1 is a shield excavator, 3 is a segment assembly device, 7 is a receiving section, 9 is an excavation pit, 10 is a segment transport device, and 22 is a segment delivery device.

Claims (1)

[Claims] 1. In a device for supplying segments to a receiving section at the top rotational position of a segment assembly device provided in a shield tunneling machine, a segment conveying section is provided movably in an excavation hole at the rear of the shield tunneling machine and extends along the upper longitudinal direction. a delivery frame having a roller provided at the front end of the delivery frame so as to be movable toward the receiving section and guiding the segment along the upper longitudinal direction; a delivery frame provided at the front end of the delivery frame. 1. An automatic segment feeding device comprising: a movable stopper for locking a segment; and a pusher provided on a delivery frame for moving the segment onto a receiving section.