JP6578752B2 - Segment unloader - Google Patents

Description

  The present invention relates to a segment unloading apparatus that unloads a segment conveyed to a rear facility connected to the rear part of a shield machine.

  The ground is excavated by a shield machine, and the lining body is constructed by sequentially assembling the segments on the inner peripheral surface of the excavation and connecting them in the circumferential direction while connecting them in the circumferential direction. There is a known shield method that uses force to carry out excavation work with a shield machine.

  Specifically, in the shield method, since the assembly work of the segment is performed inside the outer shell of the shield machine, it is necessary to transport the segment to the rear equipment connected to the rear of the shield machine through the tunnel tunnel. . The segment carried into the already-constructed lining body is loaded on the transport carriage, and is carried to the rear equipment located forward along the rails laid in the already-constructed lining body. At this time, the segment transported to the rear facility is unloaded by being lifted by a hoist crane or the like provided in the rear facility. The segment unloaded in this way is supplied to an erector, which is a segment assembly machine provided at the rear end of the shield machine, by Teruha (a hoist crane) or the like, and the erector serves as a cylindrical lining body. Assembled.

  Here, the rear equipment is equipped with ancillary equipment of a shield machine, and is provided with a temporary storage place for holding (temporarily storing) a segment to be supplied to the erector. This temporary storage place is provided with a temporary receiving device for temporarily receiving the transported segment. This temporary receiving device is composed of, for example, a hoist type crane, and lifts and unloads a segment conveyed to a temporary storage site as described above. In addition, the rear equipment is equipped with various equipment such as hydraulic pumps, hydraulic tanks and other hydraulic unit equipment, transformers and other power supply equipment, hydraulic valves, operation panels, power panels, etc. A relay pump is provided.

Japanese Patent Application Laid-Open No. 08-312296

  By the way, in recent years, in order to shorten the construction period, a shield machine (so-called simultaneous excavation shield) that simultaneously performs excavation of a face, that is, excavation and assembly of a segment by an erector has been used. It is necessary to unload segments at the same time as excavation.

  On the other hand, in Patent Document 1, a positioning carriage that integrally moves forward with the hoist beam is connected to the rear of the shield machine, and the positioning carriage and the carriage carriage are integrally moved forward as the shield machine moves. By providing a means to fix the relative position of the hoist or temporary fork that moves forward with the shield machine and the segment on the transport carriage, it is possible to unload the segment at the same time as the shield machine is dug It is described to do.

  However, the transport cart described in Patent Document 1 is provided with follower means such as a limit switch on the bumper, and the bumper comes into contact with the positioning bracket provided on the frame of the positioning cart as the rear equipment. The vehicle moves forward following the traveling of the towed positioning carriage. Alternatively, an electromagnet is provided on the bumper and the frame of the positioning carriage so as to be magnetically connected / separated so that the transport carriage follows the running of the positioning carriage. For this reason, there is a problem in that the configuration of the follow-up means for causing the transport carriage to follow the traveling of the positioning carriage is complicated, and control for positioning with high accuracy is required, which complicates the positioning operation.

  The present invention has been made in view of the above-described circumstances, and even when the shield machine is moving forward, the positional relationship between the rear equipment and the transport vehicle can be relatively stationary, and thus, high accuracy. The purpose is to improve the work efficiency while ensuring the safety of unloading work of the segment by facilitating easy positioning.

In order to solve the above problems, a segment unloading apparatus according to the present invention is a segment unloading apparatus that unloads the segment from a transport vehicle that has transported the segment to be supplied into the shield machine. A rear facility disposed at the rear, a provisional device provided in the rear facility for provisionally receiving the segment on the transport vehicle in a lifted state, and a loading platform for loading the transport vehicle, The loading platform moves integrally with the rear equipment in the digging direction of the shield machine, and the temporary receiving device is movable in the vertical direction, and the tip is a hook that is hooked on the segment. A pair of arms is provided .

  According to the present invention, since the loading platform on which the transport vehicle is loaded moves integrally with the rear equipment in the direction of digging of the shield machine, even if the shield machine moves forward, the rear equipment is relative to the transport car. It is possible to make it stationary. Thus, by facilitating highly accurate positioning, it is possible to improve the work efficiency while ensuring the safety of the segment unloading work.

At this time, it is preferable that a plurality of the provisional receiving devices are arranged in the digging direction of the shield machine . According to this, a conveyance vehicle can be raised / lowered smoothly with respect to the mounting stand of a back installation.

Moreover, it is preferable that the said loading stand is provided with the guide groove which guides the raising / lowering of the said conveyance vehicle.
According to this, it is possible to easily perform high-precision positioning in the width direction between the loaded transport vehicle and the rear facility only by causing the transport vehicle to enter along the guide groove with respect to the loading platform of the rear facility.

  According to the present invention, even when the shield machine is digging, the rear equipment can be kept relatively stationary with respect to the transport vehicle, thereby facilitating highly accurate positioning, The work efficiency can be improved while ensuring the safety of the unloading work.

It is a longitudinal cross-sectional view of the shield tunnel which shows the segment unloading apparatus in embodiment, and shows the state which loaded the conveyance vehicle to the back equipment. It is a fragmentary sectional view which shows FIG. 1 seeing from an AA direction. It is a fragmentary sectional view which shows the state which hangs a segment with an unloader apparatus seeing from the AA direction of FIG. It is a longitudinal cross-sectional view of the shield tunnel which shows the segment unloading apparatus in embodiment, and shows the state which the conveyance vehicle got off from back equipment. FIG. 5 is a partial cross-sectional view showing FIG. 4 as viewed from the BB direction.

Hereinafter, an embodiment of a segment unloading apparatus according to the present invention will be described with reference to the drawings. It should be noted that the present invention can be appropriately changed without departing from the spirit or concept of the invention which can be read from the claims and the entire specification, and the segment unloading apparatus accompanying such a change is also a technical idea of the present invention. include. Moreover, in the following description, a rear part and a back shall show the site | part and direction on the opposite side to the digging direction front of a shield machine.
<Shield construction method>

  First, the shield method will be described. As shown in FIG. 1, in such a shield construction method, the shield tunnel 1 excavates the ground by the shield machine 2 and sends out the excavated soil carried out by the screw conveyor 3 by a discharge conveyor (not shown). A cylindrical covering body 6 that sequentially assembles the segments 5 by the erector 4 as a segment assembling machine provided at the rear portion 2 and connects them in the circumferential direction and covers the inner circumferential surface of the excavation by connecting them in the circumferential direction. It is constructed by forming

In this shielding method, the shielding machine 2 has a cylindrical machine body 2a and a propulsion jack 2b. A number of cutter bits (excavation bits) 2c are erected at the tip of the machine body 2a, and a cutter face plate 2d that is driven to rotate is provided. A chamber 2e is defined on the back side of the cutter face plate 2d. . A screw conveyor 3 for discharging excavated earth and sand is connected to the chamber 2e. Specifically, the shield machine 2 cuts the ground face (not shown) facing the ground while rotating the cutter face plate 2d, and takes the excavated soil into the chamber 2e behind the cutter face plate 2d. And it advances (digging movement), conveying and discharging excavated soil backward by the screw conveyor 3 provided in the lower part of the chamber 2e.
<Segment unloading device>

  As shown in FIGS. 1 and 4, a segment unloading apparatus 10 according to an embodiment of the present invention unloads a segment 5 to be transported, and includes a rear facility 11 connected to the rear portion of the shield machine 2. ing. The rear equipment 11 is provided with an unloader device 13 as a temporary receiving device that temporarily receives the segment 5 from the transport vehicle 12 that transports the segment 5.

  Specifically, as shown in FIG. 2, the rear facility 11 is a rectangular frame 11a, 11a provided in a pair at a predetermined interval in the tunnel width direction orthogonal to the digging direction of the shield machine 2 (FIG. 1). And is arranged near the erector 4 behind the shield machine 2. The rear facility 11 is provided with a leg portion 11d that rotatably holds the roller 11c on the lower end surface 11b. The rear equipment 11 is configured to move in the tunnel of the shield tunnel 1 as the shield machine 2 advances as the roller 11c rotates along the inner surface of the already-constructed covering body 6. The frames 11a and 11a are connected so as to maintain the predetermined interval by a beam portion 11e extending in the tunnel width direction. At this time, the interval between the frames 11a and 11a is set corresponding to the vehicle width of the transport vehicle 12 (more specifically, the dimension in the tunnel width direction of the segment 5 loaded on the transport vehicle 12). Is preferred.

  In addition, the rear equipment 11 temporarily receives the segment 5 supplied to the erector 4 by the unloader device 13 provided on the opposite side surface between the frame bodies 11a and 11a provided in a pair in the tunnel width direction. This segment 5 is held (stored temporarily). That is, the rear facility 11 functions as a temporary storage place for temporarily storing the segment 5.

  A supply device for supplying the segment 5 temporarily received by the unloader device 13 to the erector 4 is provided between the shield machine 2 and the rear facility 11. The supply device includes a hoist beam having one end connected to the rear part of the shield machine and the other end extending to the rear facility, and a hoist provided slidably along the hoist beam. Since it is a general structure constituted by an apparatus, it is not shown here for convenience.

  As shown in FIGS. 2, 3, 5, etc., the rear equipment 11 includes ancillary equipment of the shield machine 2 (for example, equipment related to a hydraulic unit such as a hydraulic pump and a hydraulic tank, equipment related to a power source such as a transformer, a hydraulic valve, etc. In addition, a succeeding carriage that carries various devices such as an operation panel and a power panel, and a relay pump (both not shown) are mounted.

  In this case, the transport vehicle 12 is composed of a vehicle that travels with tires 12a. The transport vehicle 12 is loaded on the loading platform 12b with the segments 5 carried from a wellhead (not shown) and transported to the equipment 11 behind the shield machine 2 through the tunnel of the shield tunnel 1. .

  The unloader device 13 includes a set of four arms 13a provided at predetermined intervals in the digging direction and tunnel width direction of the shield machine 2, and a pair of arms 13a and 13a in the digging direction among these arms 13a. A slider 13b that is movably supported in the vertical direction and an actuator 13c that drives these are provided. The slider 13b and the actuator 13c are attached to a column portion 11f that is erected in the vertical direction in the frame 11a. 1 and 4 show a pair of arms 13a and 13a adjacent to each other in the excavation direction, and FIGS. 2, 3 and 5 show a pair of arms 13a and 13a facing each other in the tunnel width direction.

  Each arm 13a has a hook-like hook at the tip, and the pair of arms 13a, 13a adjacent to the shield machine 2 in the digging direction are opposed to the pair of opposite arms 13a, 13a facing each other in the tunnel width direction. Are arranged to be. The unloader device 13 is lifted by hooking the four arms 13a so that the plurality of stacked segments 5 on the transport vehicle 12 are hooked at the lower four corners (FIGS. 2, 3 and 3). (See FIG. 5).

  When the segment 5 transported by the transport vehicle 12 is temporarily unloaded by the unloader device 13 of the rear equipment 11, the segment 5 on the transport vehicle 12 and the arm 13a (tip hook) of the unloader device 13 are accurately positioned. Must be positioned. At this time, the rear equipment 11 is moving forward with the excavation movement of the shield machine 2.

  Therefore, in the case of the segment unloading apparatus 10 of the present embodiment, the loading platform 15 for loading the transport vehicle 12 on the rear facility 11 is integrally provided. The loading platform 15 is fixed to the frame 11a of the rear facility 11 by, for example, welding.

  The loading platform 15 is provided with a slope 15a for raising and lowering the transport vehicle 12 so that the transport vehicle 12 can be lifted and lowered smoothly. In addition, the loading platform 15 is provided with a guide groove 15c that guides the raising and lowering of the transport vehicle 12 on the floor surface 15b on which the transport vehicle 12 moves up and down. Thereby, the high-precision positioning of the loaded conveyance vehicle 12 and the back equipment 11 in the width direction can be easily performed only by entering the conveyance vehicle 12 along the guide groove 15c with respect to the loading platform 15 of the back equipment 11. It is like that. Further, the loading platform 15 is provided with a rolling member (in this case, a roller 15d is applied, but a tire or the like may be used) on the back surface side (inner side of the tunnel mine). The rear equipment 11 moves integrally with the rear equipment.

  Next, the unloading work of the segment 5 will be described. First, as shown in FIG. 1 and FIG. 2, the transport vehicle 12 enters the loading platform 15 of the rear equipment 11, and when the unloading operation of the segment 5 transported by the transport vehicle 12 is started, The rear equipment 11 is relatively stationary. At this time, the loading platform 15 is moving forward together with the rear equipment 11 because the rear equipment 11 is moving forward as the shield machine 2 moves forward as described above.

  As shown in FIG. 3, after the segment 5 on the transport vehicle 12 is temporarily received by the rear equipment 11 by the unloader device 13, when the unloading operation is finished, the segments 5 are loaded as shown in FIGS. 4 and 5. An empty transport vehicle 12 in which all the segments 5 are unloaded advances from the loading platform 15 into the tunnel mine along the slope 15a. Thereafter, the transport vehicle 12 leaves the rear facility 11 and returns to the wellhead again to load the next segment 5 to be transported.

  As described above, according to the segment unloading apparatus 10 of this embodiment, since the transport vehicle 12 is loaded on the loading platform 15 provided integrally with the rear facility 11, the rear of the shield machine 2 as the excavation moves. Even if the equipment 11 is moving forward, the rear equipment 11 can be relatively stationary with respect to the transport vehicle 12. Thus, by facilitating highly accurate positioning, it is possible to improve work efficiency while ensuring the safety of unloading work of the segment 5.

  At this time, as the transport vehicle 12 for transporting the segment 5, a cart traveling on the rail is applied by laying a rail corresponding to the rail laid in the tunnel of the shield tunnel 1 on the loading platform 15. It is also possible to do. However, by configuring the transport vehicle 12 as a vehicle that travels with tires, the troublesomeness of laying rails in the tunnel of the shield tunnel 1 and on the loading platform 15 can be eliminated, and freedom of travel in the transport vehicle 12 can be eliminated. The degree can be increased.

  Further, by providing the loading platform 15 with the slope 15 a on the elevation side of the transport vehicle 12, the transport vehicle 12 can be smoothly lifted and lowered with respect to the loading platform 15 of the rear facility 11.

  Further, by providing the floor 15b of the loading platform 15 with a guide groove 15c that guides the lifting and lowering of the transport vehicle 12, the transport vehicle 12 can be made to enter the loading platform 15 of the rear equipment 11 along the guide groove 15c. In addition, it is possible to easily perform highly accurate positioning in the width direction between the loaded transport vehicle 12 and the rear equipment 11.

  In the above-described embodiment, the case where the unloader device 13 is applied as the temporary receiving device of the rear facility 11 has been described. However, the present invention is not limited to this, and various other crane devices are applied as the temporary receiving device. be able to.

  Further, in the above-described embodiment, the supply device (not shown) includes a hoist beam whose one end is connected to the rear portion of the shield machine 2 and the other end extends to the rear facility 11, and is slidable along the hoist beam. However, the present invention is not limited to this, and various other crane devices can be applied as the supply device.

  DESCRIPTION OF SYMBOLS 1 ... Shield tunnel, 2 ... Shield machine, 3 ... Screw conveyor, 4 ... Elector (segment assembly machine), 5 ... Segment, 6 ... Covering body, 10 ... Segment unloading apparatus, 11 ... Rear equipment, 11a ... Frame, 11b ... End face, 11c ... Roller, 11d ... Leg part, 11e ... Beam part, 11f ... Column part, 12 ... Conveyor car, 13 ... Unloader device (temporary receiving device), 13a ... Arm, 13b ... Slider, 13c ... Actuator, DESCRIPTION OF SYMBOLS 14 ... Connection member, 15 ... Loading stand, 15a ... Slope, 15b ... Floor surface, 15c ... Guide groove, 15d ... Roller

Claims (3)

A segment unloading device that unloads the segment from a transport vehicle that transports the segment to be supplied into the shield machine,
Rear equipment disposed behind the shield machine;
A provisional receiving device that is provided in the rear facility and provisionally receives the segment on the transport vehicle in a suspended state ;
A loading platform for loading the transport vehicle,
The loading platform moves integrally with the rear equipment in the digging direction of the shield machine ,
The segment unloading apparatus according to claim 1, wherein the temporary receiving apparatus includes a set of four arms that are movable in the vertical direction and whose tip is a hook that is hooked on the segment. The segment unloading apparatus according to claim 1 , wherein a plurality of the provisional receiving apparatuses are arranged in a direction of excavation of the shield machine . The segment unloading apparatus according to claim 1 or 2, wherein the loading platform includes a guide groove for guiding the lifting and lowering of the transport vehicle.

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