JPH04289400A - Segment carrier - Google Patents

Abstract

PURPOSE:To enhance the efficiency of carrying work by providing a carrying means of segments to a skeleton extended from the rear of a shield excavator, and providing a locking projection provided to the carrying means so that it is positioned to a regular position against an automatic holder. CONSTITUTION:When a segment S1 is suspended from a trolley truck 31 with a hoist 27 at the rear end of a skeleton 3 and is lowered along guide frames 10 and 10 to place it on a roller 9, a locking section 8 of a chain 7 is penetrated. After that, a hanger bolt 29 is removed from the segment S1, and when the chain 7 is driven, the segment S1 is pulled forward by the locking projection 8 to carry it forward, and the locking projection 8 is brought into contact with a stop 11 to halt the chain 7. An erector 22 is stopped so that a hanger screw 24 of an automatic holder 23 reaches right above a grout hole SH of the segment S1, the hanger screw 24 is screwed into a screw-hole of the grout hole SH to lift up, and the erector 28 is rotated to place the segment S1 to a specific assembly position.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment conveying device for a shield tunneling machine.

0002

2. Description of the Related Art Among the conventional segment conveying devices for shield tunneling machines, the most common one is shown in FIGS. 5 to 7.

In FIG. 5, 21 is a shield excavator for tunnel excavation, and has an erector 22 at its rear. On the back of the erector 22, there is a segment S.
1 is rotatably provided. The automatic gripping device 23 has a hanging screw 24 that is screwed into a screw hole provided in the grout hole of the segment S1, and can lift the segment S1 after screwing in by driving a cylinder 25. .

Furthermore, a crane rail 26 extends rearward from the shield excavator 21, and a hoist 27 is provided on this rail so as to be movable. A hanging bolt 29 is hung on a hook 28 of the hoist 27. Furthermore, a traveling rail 30 is laid on the existing segment S forming the tunnel wall surface, and the segment S1 before installation is transported on the traveling rail 30 by a trolley cart 31.

[0005] In such a conventional device, the segment S
1 was transported to the position of the automatic gripping device 23 in the following manner. (2) The segment S1 is loaded onto the trolley cart 31, and the segment S1 is run on the running rail 30 and stopped at a position directly below the hoist 27. (2) Remove the hanging bolt 29 from the hook 28 of the hoist 27, and the worker screws it into the screw hole of the segment S1 on the trolley cart 31, lowers the hook 28, and hooks it onto the hanging bolt 29. (2) Next, the hoist 27 is transported along the crane rail 26 to a position just in front of the erector 22 and placed on the cradle. ■ After that, the worker attaches the hook 28 to the hanging bolt 2.
9 and evacuate the hoist 27 to the rear.
A worker removes the hanging bolt 29 from segment S1. ■ Next, rotate the erector 22 so that the erector 22
Move the automatic gripping device 23 attached to the segment S1 to a position above the segment S1 on the segment holder, and
The hanging screw 24 of the automatic gripping device 23 is automatically screwed into the screw hole of the grout hole No. 1 to perform gripping. (2) After this, the gripped segment S1 is lifted by the lifting cylinder 25, and the erector 22 is rotated to move it to a predetermined position in the circumferential direction.

[0006] In contrast to the intermittent human-powered transportation system for segments using hoists and trolleys, recently segment assembly has been implemented in which a chain conveyor is provided with claws for pushing out the segments, and the segments are placed from the rear of the excavator or immediately after the excavator. Japanese Patent Publication No. 63-54119 discloses a method of transferring the material to the bottom of an automatic gripping device.

[0007]

According to the prior art apparatus as described above, the segments are suspended by a hoist and brought to the position of the automatic gripping device. For this reason, it is extremely difficult to always bring the grout hole (screw hole) to a constant position in the front, back, left and right directions with respect to the automatic gripping device. To deal with this, the automatic gripping device needs a complex device to detect the position of the grout hole, and the detected signal must be used to precisely control the drive of the erector or automatic gripping device to remove the grout. A special drive is also required to align the holes and the hanging screws of the automatic gripping device.

[0008] Furthermore, carrying in segments one by one using a hoist, retracting them, and then carrying in the next segment results in wasted time and poor work efficiency.

[0009] In addition, it is necessary for the worker to remove the hook of the hoist from the hanging bolt screwed into the screw hole of the grout hole immediately before the rotating erector, and to remove the hanging bolt from the screw hole. Because the space is narrow, the work is difficult and dangerous.

[0010] In Japanese Patent Publication No. 63-54119, the human power is significantly reduced, but the segments are simply conveyed by a chain conveyor with claws for pushing out the segments, and the segments are placed directly under the automatic gripping device. cannot be stopped properly. For this purpose, a practical flat 2
-97498 It is necessary to provide an automatic adjustment mechanism such as "segment automatic gripping device".

The present invention solves this problem by devising a segment conveying device so that the threaded hole of the grout hole always stops at a fixed position, and by using a grout hole detection device of an automatic gripping device, an erector, or an automatic gripping device. This system allows multiple segments to be sent forward one after another without requiring a drive control device, increasing the efficiency of conveyance work.Furthermore, it eliminates the need for workers to remove hooks and hanging bolts directly in front of the erector, which saves laborious work. An object of the present invention is to provide a segment conveyance device that can eliminate dangerous work.

0012

[Means for Solving the Problems] According to the present invention, the above object is achieved by having a frame extending from the rear of the shield tunneling machine,
The frame is movable forward over the existing segments so as to be in a running position relative to the automatic gripping device for assembling the segments, and the frame is equipped with a plurality of segments that are held at predetermined distances in the front and back direction before installation. A conveying means is provided for placing the segment on the frame and conveying the segment forward with respect to the frame, and the conveying means has locking protrusions that lock from the outside into the grout hole of each segment before installation, at intervals of the predetermined distance. This is achieved by being able to transport the segment intermittently every predetermined distance so that the locking protrusion is in a fixed position with respect to the automatic gripping device.

[0013]

[Operation] In the present invention having such a structure, a plurality of segments before being installed are placed one after another on the conveying means. The conveying means is provided with locking protrusions that lock with the grout holes of the segments at predetermined intervals, and each segment on the conveying means is locked with this member and positioned at the predetermined distance intervals. Since the conveying means intermittently conveys the segment by the predetermined distance, after the segment located at the beginning is gripped by the automatic gripping device, the next leading segment is also brought to the same position. Thus, if the position of the grout hole of the leading segment is initially set at the position of the hanging screw of the automatic gripping device, gripping by the automatic gripping device is automatically performed without any position adjustment.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4 of the accompanying drawings.

FIG. 1 is a partially sectional front view of the apparatus of this embodiment in use. FIG. 2 is an enlarged sectional view taken along line II-II in FIG. In the figure, parts common to those of the conventional apparatus shown in FIGS. 5 to 7 are designated by the same reference numerals, and their explanations will be omitted.

In the device of this embodiment, the shield excavator 2
A beam member 1 is provided to protrude rearward from the beam member 1.
A frame 3 is connected to the frame 3 via pins 2. The frame 3 has a frame shape and has an automatic gripping device 2 in the longitudinal direction of the tunnel.
It extends long from position 3 to a position near the front end of the traveling rail 30, and in the circumferential direction of the tunnel, it is formed with a width equal to at least one segment along the lower surface of the tunnel.

At the bottom of the frame 3, rollers 4 as wheels are provided at appropriate positions in the longitudinal direction and in the circumferential direction as well as in FIG. 2, to support the weight and load of the frame 3. At the same time, the frame 3 is made movable on the existing segment S.

Sprockets 5 and 6 are provided at the front and rear ends of the frame 3, and the sprockets 5 and 6
A chain 7 is stretched so as to run intermittently back and forth within the frame-shaped frame 3. This chain 7 has segment S
The locking protrusions 8 that penetrate into the grout holes SH of the segment S1 are attached at a pitch equal to or slightly longer than the length of one grout hole SH of the segment S1. Segment S1 can be towed forward. Further, the frame 3 is provided with other rollers 9 at a plurality of appropriate positions in the longitudinal direction and the circumferential direction above the roller 4, and movably supports the segment S1 pulled by the chain 7. There is.

Guides 10, 10 are provided at the rear of the frame 3, and a segment S is provided between the guides 10, 10.
1, the segment S1 is placed in a fixed position relative to the chain 7 to be stopped, and the grout hole SH is engaged with the locking protrusion 8 of the chain 7. A locking projection 8 at the front end of the chain 7, that is, a segment S1 locked to this
The automatic gripping device 23 holds the grout hole in the front and back direction.
The stopping position of the chain 7 is set so that it is at the position of the hanging screw 24.

As described above, the chain 7 is intermittently run, and this is done by the operator operating the switch of the drive device consisting of a motor with a deceleration means (not shown), etc., to drive the chain 7 and move the frame 3. This is done by stopping the chain 7 when the locking protrusion 8 of the chain 7 comes into contact with a stop switch 11 provided at a predetermined position. The chain 7 thus conveys the segments S1 one by one to the position of the automatic gripping device 23.

In the apparatus of this embodiment, the segment S1 is conveyed to the automatic gripping device in the following manner. ■ At the rear end of the frame 3, a worker screws the suspension bolt 29 into the screw hole of the grout hole of the segment S1 from the trolley cart 31 and uses the hoist 27 to remove the segment S.
1 is lifted from the trolley cart 31 and gently placed on the unloading roller 9 along the guide frames 10, 10 of the frame 3. (2) Then, the locking protrusion 8 of the chain 7 that is stopped at the lower part of the grout hole of the suspended segment S1 penetrates. ■ Next, the worker removes the hook 28 of the hoist 27 from the hanging bolt 29, and also removes the hanging bolt 29 from the segment S.
Remove from 1. ■ Here, the worker presses the switch that activates the motor to drive the chain 7. The segment S1 is pulled forward by the locking protrusion 8 penetrated into the grout hole SH.

When the segment S1 is conveyed forward by one segment, the locking protrusion 8 that has passed through the front sprocket 8 comes into contact with the stop 11, and the chain 7 is stopped here. In this way, the segments S1 are sent forward intermittently, but
Segment S1 has its grout hole SH always fixed in the front-back direction when the hanging screw 24 of the automatic gripping device 23
Stop at the position. After that, stop the erector 22 so that the hanging screw 24 of the automatic gripping device 23 is directly above the grout hole 31 of the segment S1, lower it by the lifting cylinder 25 while rotating the hanging bolt 24, and remove the hanging screw. 2
4 into the screw hole of the grout hole, the lifting erector 28 is rotated to place the segment S1 at a predetermined assembly position.

The present invention is not limited to the embodiments described above, but can be modified. For example, the conveying means does not have to be rollers and chains, but can also be a conveyor.

[0024]

As described above, according to the present invention, segments can be conveyed so that the grout hole through which the hanging bolt of the automatic gripping device is inserted is always at a constant position relative to the erector. The complicated device for detecting the position of the grout hole and the position for accurate driving of the automatic gripping device, which were provided in the device, are no longer required, making it economical.

Furthermore, by sequentially sending out a plurality of segments forward from the rear, the working area of the hoist becomes a short section at the rear, saving time for hoist retraction and making it possible to improve the efficiency of the conveyance work. In addition, it is possible to eliminate laborious and dangerous work by eliminating the need for the worker to remove the hook and hanging bolt immediately in front of the erector.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view of an apparatus according to an embodiment of the present invention in a state of use.

FIG. 2 is an enlarged sectional view taken along line II-II in FIG. 1;

FIG. 3 is an enlarged front view of a locking protrusion attached to the chain of FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is a partially sectional front view of the conventional device in use.

FIG. 6 is an enlarged sectional view taken along VI-VI in FIG. 5;

FIG. 7 is a cross-sectional view of the segment when a hanging bolt is screwed into the screw hole of the grout hole of the segment.

[Explanation of symbols]

3. Frame 7, 8, 9 Conveyance device 7 Chain 8 Locking protrusion 9 Roller 8 Locking member (locking protrusion) 21 Tunnel digging machine 23 Automatic gripping device S　Existing segment S1 Segment before installation

Claims (1)

[Claims] Claim 1: The shield tunneling machine has a frame extending from the rear thereof, and the frame is movable forward over the existing segments so as to be in a running position with respect to an automatic gripping device for assembling the segments. and a conveying means is provided on the frame for placing a plurality of segments before installation at predetermined distances in the front-back direction and conveying the segments forward with respect to the frame,
The conveying means is provided with locking protrusions that lock into the grout holes of each segment from the outside before installation, at each predetermined distance. A segment conveying device capable of conveying the segment intermittently for each distance.