JP2006225913A - Conveyance system for lining segment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveyance system for a lining segment, which enables the segment to be conveyed to a rear position of a face from on the ground through an automatic unattended operation, by enabling a crane, installed on the upper section of a vertical shaft, and an in-pit carrier vehicle to be used in cooperation with each other. <P>SOLUTION: When the lining segment 40 is conveyed into a tunnel excavation pit 3 from a ground section, it is held by a segment glove 7 and lowered in a suspended state from below a starting shaft 2 by means of the crane, according to instructions from the outside; the segment glove 7 is guided by a guiding means (vertically ascending/descending guide 6) midway through the operation of lowering the crane; and the lining segment 40 is directly transferred from the segment glove 7 to an in-pit carrier truck 36 which stands by in a load supporting position on the bottom of the vertical shaft, and conveyed to the face 3a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a transport system for a lining segment that almost automatically transports a lining segment in a tunnel construction site using a shield method from the ground to the rear face position.

  The shield method for building a tunnel in the ground is to dig a ground with a shield excavator, assemble a lining segment inside the shield excavator, cover it, and apply a reaction force to the front end of this segment. The tunnel is formed by repeatedly taking the shield excavator and propelling it.

  In such a shield construction method, for example, a material storage warehouse (rack device) that stores the segments on the ground is installed as a means for transporting the segments for lining from the ground to the shield excavator, and the segments are managed and stored. In order to carry the segment taken out from the material storage warehouse into the tunnel, it is transported from the warehouse to the shaft position by the transport carriage, moved to the shaft bottom by the vertical transport device installed in the shaft, and then the track in the tunnel yard from the shaft. Patent Document 1 discloses a method of transporting the top by moving it to the rear position of the shield excavator. Also, at construction sites where there is no storage space for materials (segments, etc.) such as urban areas, segments that are transported from the factory in the segment receiving yard are temporarily stored in multistage storage shelves that are installed using shafts. Japanese Patent Application Laid-Open No. 2004-228561 discloses a method of sequentially taking out according to a supply request, transferring it to a local transport cart, and transporting it to a shield excavator.

  Further, as a system for guiding an unmanned transport cart throughout the tunnel mine to transport a segment from the ground to a shield excavator, there is one known from Patent Document 3. A segment grab suitable for transporting a segment formed in an arc shape is disclosed in, for example, Patent Document 4.

Japanese Patent Laid-Open No. 2-194297 JP-A-10-331599 JP 2000-186500 A JP 2000-53368 A

  However, recently, when constructing underground tunnels in urban areas, etc., it is often difficult to widen the space for receiving lining materials due to the installation circumstances of the starting base. There is a problem that it is not possible to install a receiving facility for lining materials such as segments.

  In addition, there may be a case where there is not enough space for the installation equipment of the segment due to the situation of the installation site of the shaft. For this purpose, as seen in the prior art, the direction of the segment during transportation of the segment sent from the ground part to the transport carriage in the tunnel is moved to a direction that is convenient for handling, that is, for example, in the ground part, When the direction of the segment mounted on the carriage is mounted on the transport carriage within the shaft, the handling may not be performed such that the direction when the segment is fed is kept as it is and transferred to the transport truck. For example, transfer of the lifting device for transporting the segment from the ground to the tunnel excavation construction direction from the lifting carriage to the transport carriage on the horizontal plane cannot be performed straight or orthogonally, but moved in an oblique direction A situation arises that must be done. In such a construction site, it is difficult to adopt a carry-in system as known in Patent Document 1 or 2.

  On the other hand, if the method of hanging the segment on the ground and hanging it on the bottom of the shaft with a crane as before and mounting it on the conveyor cart under the sign of the loader in the shaft, the excavation progressed. When carrying in to a long distance, the transportation carts in the mine are divided into two, which requires a large number of cargo handling workers. Moreover, when the depth of the shaft becomes deep, there is a problem that it is difficult to perform the mounting operation on the transport carriage at the load receiving place due to the swing of the suspended load. Therefore, in such a shaft where conditions for carrying lining materials (segments, etc.) into the tunnel are severe, there is a problem that work efficiency is unavoidably reduced by carrying-in work by ordinary means.

  The present invention has been made to solve such problems, and enables a crane installed in the upper part of a shaft and a mine transport vehicle to be used in cooperation to perform segment transportation from the ground to the rear face position of the face. An object of the present invention is to provide a conveyor system for a lining segment that can be operated automatically and unattended.

In order to achieve the above object, a transport system for a lining segment according to the present invention comprises
When transporting the lining segment from the ground part into the tunnel excavation mine, the segment grab is grasped by the segment grab from above the starting shaft by the command from the outside and suspended by a crane, and the segment grab is suspended by a guide means. It is guided and transferred from the segment grab directly to the underground transport carriage waiting at the cargo receiving position at the bottom of the shaft and transported to the face (first invention).

  In the above invention, the guide means for the segment grab is configured such that a guide rail is disposed from the upper part of the shaft to the upper part of the receiving position of the transport carriage, and the segment grab is provided with a guide roller that engages with the guide rail and is guided up and down. There should be (second invention).

In the above invention, the crane that suspends and conveys the segment grab may be an overhead crane constructed on the upper part of the starting shaft (third invention).

  Moreover, in the said invention, conveyance of the lining segment from the said cargo receiving position to a face is good to be performed by the automatic driving | operation by an underground trolley | bogie (4th invention).

  According to the present invention, when the lining segment is loaded onto the underground transport carriage by the crane provided in the upper part of the shaft and is carried into the mine, the guide means is erected on the shaft using the segment grab lifted and lowered by the crane. By guiding the elevator up and down, guiding it to the transport cart waiting at the receiving position, and loading it directly from the segment grab onto the transport cart, the operation can be performed automatically. This makes it possible to improve work efficiency. Further, it is possible to avoid dangerous work and to promote improvement of the work environment.

  In addition, when the segment grab is suspended from the top of the shaft by the guide rail from the upper part of the shaft to the upper part of the receiving position of the carriage, the segment grab is guided by this guide rail. In addition, the hanging posture of the segment grab can be stabilized, and it can be carried in without causing a load swing, facilitating the driving operation and promoting the automation. In addition, it is possible to change the direction of the hanging posture, and there is an advantage that the material can be easily carried in according to the on-site conditions.

  Next, a specific embodiment of the transport system for a lining segment according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a schematic diagram of a conveying system for a lining segment according to an embodiment of the present invention. 2 is a plan view of the shaft, FIG. 3 is a view taken along the line AA of FIG. 2, FIG. 4 is a front view of the segment grab used, and FIG. 5 is a plan view of the segment grab of FIG. However, FIG. 6 shows a left side view of FIG. 4, and FIG. 7 shows a view showing the guide roller portion of the segment grab.

  As the transport system 1 of the lining segment of this embodiment, the overhead crane 2 is installed on the ground portion of the start shaft 2 so as to extend over the upper portion of the shaft 2 and is supported by the wall surface of the shaft 2 so as to stand inside. Vertical lifting guide 6, segment grab 7 suspended by the overhead crane 4 and guided by the vertical lifting guide 6, and lining material from the bottom 2 a of the shaft 2 to the face 3 a in the excavation mine 3 A transport carriage 36 in the mine to be transported and its track, and control means for controlling the mine transport of the segment 40 by the overhead crane 4 and the transport of the excavation mine by the transport carriage 36 are configured.

  In this embodiment, the traveling axis C of the overhead crane 4 installed above the shaft 2 with respect to the excavation axis T of the excavation shaft 3 (tunnel) is displaced by 30 ° in the transverse direction due to the circumstances of the site. It is installed at.

  The overhead crane 4 is supported by the construction structure in a temporary building (not shown) that covers the upper part of the vertical shaft 2 and travels on the upper part of the vertical shaft 2. The lining segment 40 carried in from the factory is installed. A segment grab 7 (details will be described later) is suspended from the club 4 a of the overhead crane 4, and the segment grab 7 is guided by a vertical elevating guide 6 erected in the shaft 2 to receive the cargo at the shaft bottom 2 a. It can be hung up to a position just above the transport carriage 36 waiting at the position P.

  As shown in FIGS. 4 to 7, the segment grab 7 includes a suspension support frame 11 formed in a rectangular shape that is suspended from a club 4 a of the overhead crane 4 by a plurality of ropes, and the suspension support. A pair of left and right segment holding frames 12, 12 that are pivotally supported and pivotally supported on both outer sides of both longitudinal ends of the frame 11, and mounted on the suspension support frame 11. A power cylinder 14 is connected to the end of an operating rod 13 that extends upward from the pivot position of the segment holding frame 12 and rotates the segment holding frame 12.

  The suspension support frame 11 has a width that is slightly wider than the width of the lining segment 40 handled. The segment holding frames 12, 12 are respectively mounted on pivot shafts 15, 15 that are supported by bearings in parallel through the main members 11 a, 11 a on both sides of the suspension support frame 11 at symmetrical positions separated from the center by a required dimension. A pair of leg members 12a, 12a of a required length attached to the ends, and the lower ends of the leg members 12a, 12a are connected by a cross beam member 12b to form a U-shaped frame with a dimension that can receive the segment 40 inside. Is formed. The segment holding frames 12 and 12 are suspended symmetrically at both ends in the longitudinal direction of the suspension support frame 11. For example, a urethane resin plate is affixed as a cushioning material to the inner side surfaces of the leg members 12a and 12a of the segment holding frames 12 and 12 and the upper surface of the cross beam member 12b. In addition, a pair of brackets 16 and 16 are erected at the center of the suspension support frame 11 on connecting members 11c and 11c that connect intermediate portions of the main members 11a and 11a on both sides. The suspension pulley 17 is rotatably supported by the supported rotating shaft. The segment grab 7 is suspended by the overhead crane 4 with a rope around the suspension pulley 17. At the center of the suspension support frame 11, cylindrical steady rests 19 and 19 are erected on the frame 18 that is erected on the connecting members 11 c and 11 c. The lateral swing is stopped by engaging with a steady member (not shown) hanging from the crane club. The power cylinder 14 is supported at the base end by a bracket 14 a erected on the suspension support frame 11, and the operation rod 13 of the segment holding frame 12 has the base end portion on the pivot shaft 15. The power cylinder and the tip are connected to each other, and the segment holding frame 12 is swung via the pivot shaft 15 by the expansion and contraction operation of the power cylinder.

  The segment grab 7 configured as described above projects from the side surface of one main member 11a of the suspension support frame 11 in a direction orthogonal to the opening / closing direction of the pair of segment holding frames 12, 12. A support member 22 having a base end attached to the mounting pieces 21 and 21 and protruding in a lateral direction as appropriate is provided. By the support member 22, a pair of guide rollers 23 and 23 are arranged at a predetermined interval with the rotation shaft 24 and 24 is attached so as to be parallel to the main member 11 a of the suspension support frame 11. Although not shown, a control panel for power cylinders 14 and 14 for operating the pair of segment holding frames 12 and 12 is mounted on the suspension support frame 11. Each of the segment holding frames 12 and 12 is provided with a photoelectric sensor (not shown) for detecting the presence or absence of the segment 40 to be handled, and a signal is transmitted to the control unit in the control panel. The power cylinder 14 is an electric cylinder.

  The vertical elevating guide 6 (corresponding to the guiding means of the present invention) is formed in a frame by connecting a pair of guide rails 30, 30 with a number of horizontal connecting members 31, and is based on the side wall of the shaft 2. The segment 40 supported by the plurality of support members 34 supported at the ends and carried by the segment grab 7 suspended by the overhead crane 4 is directly transferred to the transport carriage 36 in the mine that stands by at the load receiving position P in the shaft bottom 2a. It is erected substantially vertically so that it can be mounted, and guides the segment grab 7 up and down. This vertical lift guide 6 is a transport carriage at the load receiving position P at the shaft bottom 2a from the hanging posture of the segment grab 7 at the unloading position P ′ of the overhead crane 4 (intersection of the traveling direction and the transverse direction of the club). 36 so as to be able to match the loading posture. Therefore, as shown in FIGS. 8A to 8C, the vertical elevating guide 6 is twisted by appropriately displacing the upper guide portion 32 of the guide rails 30 and 30 by about 30 ° in the section. It has a different shape. And this vertical raising / lowering guide 6 is standingly arranged in the side required position of the conveyance carriage 36 which waits in the said cargo receiving position P. As shown in FIG. Further, the pair of guide rails 30 and 30 are formed in a groove shape at opposite side portions, and guide the guide roller 23 attached to the segment grab 7 along the groove portion 30a. Further, on the top of the upper guide portion 32 of the guide rail 30, a roller guide 33 is attached to each of the segment grabs 7 so as to facilitate the introduction of the guide rollers 23, 23 attached to the segment grab 7. In the figure, reference numeral 35 denotes an upper stay that supports the upper guide portion 32 of the guide rail 30, and reference numeral 35a denotes a working landing.

  On the other hand, on the shaft bottom 2a, a traveling track of a transport carriage 36 leading to the position of the shield machine 8 of the excavation shaft 3 is laid, and a plurality of units driven by an underground transport drive vehicle 37 (battery loco) traveling on this track. A transport carriage 36 is arranged. A segment support is arranged on the transport carriage 36 so that a plurality of segments 40 carried by the segment grab 7 can be mounted as they are. Further, the underground conveyance drive vehicle 37 is operated by radio control as known from, for example, Japanese Patent Laid-Open No. 2000-186500, and can reciprocate from the shaft receiving position P to the shield machine 8 of the face 3a. .

  In addition, with regard to the carry-in operation from the above-ground part to the receiving position P to the transport carriage 36 through the shaft 2, automatic operation by automatic control of the overhead crane 4 and operation of the segment 40 by the segment grab 7 are automatically performed. A control panel (not shown) provided with control means is provided on the ground portion so as to automatically carry from the intake in the ground portion to the front face of the tunnel in cooperation with the automatic transport of the underground by the carriage 36. Yes.

  Next, the transport procedure will be described based on the segment transport flowchart shown in FIG.

  S1 to S3: Workers were carried in advance to the segment accumulation location 5 adjacent to the vertical shaft 2 on the ground, and prepared for loading by stacking a predetermined number (for example, three segments). The segment 40 is operated by operating the overhead crane 4 to operate the segment grab 7 suspended from the club 4a (step S1). The segment grab 7 is lowered, the power cylinder 14 is operated to open the left and right segment holding frames 12 and 12, and the segment 40 prepared for conveyance is squeezed and held (S2). Next, the segment grab 7 is moved up to an automatic point position (a height position where automatic operation is possible) (S3). This operation is performed by an operation by an operator.

  S4 to S6: An operator issues an automatic operation start command signal (turns on an automatic operation switch) (S4). When the automatic operation mode is entered, the hoist of the overhead crane 4 is hoisted and the segment grab 7 is hoisted (S5). Thereafter, the overhead crane 4 starts traveling, and the club 4a starts traversing and moves to the upper portion of the shaft 2 at a high speed (S6).

  S7 to S8: When the overhead crane 4 approaches the target position P ′ (vertical shaft descending position), the traveling and traverse speed are decelerated (S7). The position of the club 4a (the suspended segment grab 7) traversing by the action of the encoder is matched with the vertical shaft lowering position of the segment grab 7 (S8).

  S9 to S11: When the overhead crane 4 has adjusted the segment grab 7 to the intersection position in the traveling direction and the transverse direction matching the descending position to the shaft 2, the hoist is switched to the descending operation and lowered, and the position is directly below it. The guide rollers 23 and 23 provided with the segment grab 7 are received in the roller receiving guide 32 at the top end of the guide rails 30 and 30 of the vertical lowering guide 6 (S9). Subsequently, when the segment grab 7 is lowered, the guide rollers 23 and 23 are guided by the guide rails 30 and 30 of the vertical lowering guide 6 and are lowered as they are. When the segment grab 7 is lowered, the attached guide rollers 23 and 23 are surely introduced and guided into the guide rails 30 and 30 by the roller receiving guides 32 and 32 in spite of being suspended in the air. In addition, the upper part 32 of the guide rails 30 and 30 is twisted and changed to a direction corresponding to the receiving posture at the load receiving position P before being lowered from the hanging posture (S10). Moreover, even if the hanging posture of the segment grab 7 is changed in the middle, it can be lowered in a stable posture without causing a load swing by the guide rail 30 guide. Eventually, when reaching the segment grab interference area before reaching the lowest position (a position slightly above the height position where the segment 40 is mounted on the transport carriage 36), the descent is stopped and waited (S11). By doing so, it is possible to avoid contact with the load of the transport carriage 36.

  S12 to S14: When the empty transport carriage 36 arrives at the load receiving position P of the shaft bottom 2a, a signal from the detection means (sensor) for detecting the arrival of the transport carriage 36 installed at the position and the presence or absence of the load is displayed on the ground. A signal for receiving the cargo is transmitted to the control device installed in the section and given to the control section of the overhead crane 4 (S12). Then, the hoist is driven to lower the segment grab 7 to the lowering stop position on the transport carriage 36 and stop (S13). Next, the power cylinders 14 and 14 of the segment grab 7 are operated to open the left and right segment holding frames 12 and 12 at the same time, and the gripped segment 40 is transferred onto the support base of the transport carriage 36 (S14).

  S15 to S16: When the loaded segment 40 is transferred from the segment grab 7 onto the transport carriage 36, the held segment 40 is released by the sensors attached to the segment holding frames 12 and 12 of the segment grab 7. When this is detected and a suspended load release signal is sent to the control unit of the overhead crane 4, the segment grab 7 is opened to a predetermined height (S15). After the segment holding frames 12 and 12 with the segment grab 7 opened so as to cross the segment 40 on the transport carriage 36 and reach the position that does not prevent the segment grab 7 from rising, the segment grab 7 is closed ( (Return the power cylinders 14 and 14) (S16).

  S17 to S19: When the segment grab 7 is closed in step S16, the segment grab 7 is raised to escape from the guide by the guide rail 30 of the vertical lifting guide 6 (S17). After that, after operating the overhead crane 4 to wind up the segment grab 7 to a predetermined height, the overhead crane 4 is traveled and traversed (S18), and returned to the travel origin position of the overhead crane (S19). Then, it waits until the next segment 40 fetch command.

  Thus, when the segment 40 is sequentially loaded from the ground portion onto the plurality of transport carriages 36 waiting at the receiving position P of the shaft bottom 2a, the transport carriage 36 loaded with the segments 40 is pulled by the drive car 37 to It automatically travels according to the command, moves inside the mine, and is sent to the rear position of the shield machine 8. When the transport carriage 36 unloaded at the rear position of the shield machine 8 is returned again to the load receiving position P of the shaft 2, it receives the segment 40 in the manner described above, travels in the shaft, and is sent again to the rear portion of the face 3a. Thereafter, the lining segment 40 is transported by repeating this operation.

  As described above, according to the segment transport system of the present embodiment, an instruction for an automatic operation command is given to the control unit after the operator performs an operation of taking the segment into the segment grab for carrying it into the shaft at the segment accumulation point. After that, all the transport to the shield machine in the excavation mine can be performed automatically, especially the transition from the vertical transport in the vertical shaft to the horizontal transport in the mine can be automated, ensuring work safety and work efficiency. Can be improved. And by the automation, cost reduction can be expected when work at a large depth or a mine transport distance becomes long, and the construction cost can be reduced. In addition, at the lifting position, the guide device is used to eliminate the vibration of the load, improve safety, and allow the transfer from the grab to the transport carriage to be performed smoothly.

Schematic diagram of a conveyor system for a lining segment according to an embodiment of the present invention Top view of shaft A-A view of FIG. Front view of the segment grab used Plan view of the segment grab in FIG. Left side view of FIG. Diagram showing the guide roller part of the segment grab Upper rear view (a) and right side view (b) and plan view (c) of the vertical lifting guide Segment transport flowchart

Explanation of symbols

2 Vertical shaft 3 Excavation shaft 4 Overhead crane 6 Vertical lift guide 7 Segment grab 8 Shield machine 11 Suspension support frame 12 Segment holding frame 13 Operation rod 14 Power cylinder 23 Guide roller 30 Guide rail 32 Upper guide part 36 Transport carriage 40 Segment

Claims (4)

  When transporting the lining segment from the ground part into the tunnel excavation mine, the segment grab is gripped by the segment grab from above the starting vertical shaft by an external command, and suspended by a crane. A transport system for a lining segment, which is guided and transferred directly from the segment grab to a downhole transport carriage waiting at a receiving position at the bottom of the shaft and transported to a face.   2. The guide means for the segment grab is configured such that a guide rail is disposed from the upper part of the shaft to the upper part of the receiving position of the transport carriage, and the segment grab is provided with a guide roller that engages with the guide rail and is guided up and down. The conveyor system for the lining segment described in 1.   The crane system for conveying a lining segment according to claim 1, wherein the crane that hangs and conveys the segment grab is an overhead crane that is constructed on an upper part of the start shaft.   The transport system for a lining segment according to claim 1, wherein the transport of the lining segment from the cargo receiving position to the face is performed by an automatic operation by an underground transport carriage.

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