Charging method of battery locomotive

Abstract

To improve conveyance efficiency of a battery locomotive.SOLUTION: A pantograph PG which is electrically connected to a battery B of a battery locomotive BL traveling in an excavation pit DP constructed by a shield machine S is connected to a power supply trolley wire PW provided in a state of extending over a plurality of subsequent carriages FT towed to the rear of the shield machine S, and thereby the battery B of the battery locomotive BL is charged.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for charging a battery locomotive, and more particularly to a method for charging a battery locomotive used, for example, for transporting materials, excavated earth and sand, etc., in a tunnel excavated by a shield tunneling machine. [Background technology]

[0002] A battery locomotive is a locomotive that uses an onboard battery (storage battery) as a power source to pull or push a cart loaded with materials and excavated soil from the starting shaft to the face.

[0003] The battery of a battery locomotive needs to be charged for each cycle, and this is done, for example, by charging a spare battery in the charging space of the departure shaft while the battery loco is operating, and then replacing the depleted battery with a charged spare battery in the charging space of the departure shaft after each cycle is completed.

[0004] Such battery locomotives are described, for example, in Patent Document 1, which discloses a technology for charging the battery of a battery locomotive by bringing a current collector installed on the battery loco into contact with a trolley wire installed in a power supply section of a section within a tunnel while the battery loco is traveling. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-126045 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in recent years, as excavation shafts have become longer, the distance excavated per day has increased, and the diameter of excavation shafts has also become larger, the running time, running distance, and weight of battery locators have increased, and the frequency of battery replacement in battery locators has tended to increase.

[0007] For this reason, measures have been taken such as providing a separation point within the excavation shaft, placing chargers and spare batteries within the excavation shaft, and excavating work being carried out while changing batteries. However, this increases costs, takes time to change batteries, and reduces the efficiency of transporting excavated soil and other materials using battery locos.

[0008] The present invention has been made in light of the above-mentioned technical background, and aims to provide a technology that can improve the efficiency of transporting excavated soil and sand using a battery locomotive.

[0009] Another object of the present invention is to provide a technique that can reduce the work involved in constructing an excavation tunnel using a shield machine.

[0010] Another object of the present invention is to provide a technology that can reduce the cost of batteries for battery locomotives.

[0011] Another object of the present invention is to provide a technique that can reduce the cost of excavating a tunnel using a shield machine. [Means for solving the problem]

[0012] In order to solve the above problem, the method for charging a battery loco of the present invention described in claim 1 is characterized in that the battery is charged by electrically connecting a collector part provided on a battery loco that moves multiple transport carts within an excavation tunnel constructed by a shield tunneling machine while connected to the battery of the battery loco, to a power supply trolley wire provided on a trailing cart that is towed behind the shield tunneling machine and extending along the excavation direction of the shield tunneling machine.

[0013] The method for charging a battery loco of the present invention described in claim 2 is characterized in that, in the invention described in claim 1, the shield tunneling machine is an earth pressure shield tunneling machine, and multiple transport carts are moved sequentially by the battery loco to directly below a soil discharge outlet section that discharges excavated soil excavated by the shield tunneling machine, and while the excavated soil discharged from the soil discharge outlet section is loaded sequentially onto the multiple transport carts, the current collecting section of the battery loco is kept electrically connected to the power supply trolley wire of the trailing cart, thereby continuing to charge the battery.

[0014] The method of charging a battery locomotive of the present invention described in claim 3 is characterized in that, in the invention described in claim 2, the transport carts are connected in multiple units along the excavation direction of the shield tunneling machine and are carts that load excavated soil discharged from the soil discharge outlet provided on the trailing cart, and the power supply trolley wire is arranged in a state where it extends from the position where the current collecting part contacts the power supply trolley wire when the transport cart that starts loading among the multiple transport carts is directly below the soil discharge outlet to the position where the current collecting part contacts the power supply trolley wire when the transport cart that finishes loading among the multiple transport carts is directly below the soil discharge outlet.

[0015] A charging method for a battery locomotive according to the present invention as set forth in claim 4 is characterized in that, in the invention as set forth in any one of claims 1 to 3, the battery is a lithium ion storage battery. [Effects of the Invention]

[0016] According to the present invention, it is possible to improve the efficiency of transporting excavated soil and sand using a battery locomotive.

[0017] Furthermore, according to the present invention, it is possible to reduce the work involved in constructing an excavation tunnel using a shield machine.

[0018] Furthermore, the present invention makes it possible to reduce the cost of batteries for battery locomotives.

[0019] Furthermore, according to the present invention, it is possible to reduce the cost of excavating a tunnel using a shield machine. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a side view of a main part of a shield tunneling mechanism in which a charging mechanism for a battery locomotive is arranged, which is an embodiment of the present invention. [Figure 2] FIG. 2 is an enlarged side view of the main part of the shield tunneling mechanism of FIG. 1, surrounded by a dashed line. [Figure 3] FIG. 3 is a front view of the trailing bogie and the battery locomotive as viewed from the direction indicated by arrow A in FIG. 2. [Figure 4] FIG. 2 is an enlarged side view of the main part of the shield tunneling mechanism of FIG. 1, surrounded by a dashed line, after the battery locomotive has been removed. [Figure 5] FIG. 5 is a front view of the trailing bogie as seen from the direction indicated by arrow A in FIG. 4. [Figure 6] This is an enlarged side view of the main parts of the battery locomotive and the transport cart at the start of loading excavated soil. [Figure 7] This is an enlarged side view of the main parts of the battery locomotive and the transport cart at the end of loading the excavated soil. [Figure 8] FIG. 2 is a plan view of an example of the battery locomotive of FIG. 1. [Figure 9] FIG. 9 is a side view of the battery locomotive of FIG. 8. [Figure 10] FIG. 9 is a front view of the battery locomotive as seen from the direction indicated by arrow A in FIG. 8. [Figure 11] FIG. 2 is a schematic circuit diagram of an example of a charging mechanism for a battery locomotive. [Figure 12] FIG. 2 is a side view of the main part of the shield tunneling mechanism in the middle of an excavation process, in which the charging mechanism of the battery locomotive in FIG. 1 is arranged. [Figure 13] FIG. 13 is a side view of the main part of the shield tunneling mechanism during the excavation process after the process of FIG. 12. [Figure 14] FIG. 14 is a side view of the main part of the shield tunneling mechanism during the excavation process after the process of FIG. 13. [Figure 15] FIG. 15 is a side view of the main part of the shield tunneling mechanism during the excavation process after the process of FIG. 14. [Figure 16] FIG. 16 is a side view of the main part of the shield tunneling mechanism during the excavation process after the process of FIG. 15. [Figure 17] FIG. 17 is a side view of the main part of the shield tunneling mechanism during the excavation process after the process of FIG. 16. [Figure 18] FIG. 10 is a front view of a modified example of the trailing bogie. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the drawings for explaining the embodiment, the same components are generally designated by the same reference numerals, and repeated description thereof will be omitted.

[0022] Figure 1 is a side view of the main parts of the shield tunneling mechanism in which the charging mechanism for the battery loco in this embodiment is arranged, Figure 2 is an enlarged side view of the main parts of the area surrounded by the dashed line in the shield tunneling mechanism in Figure 1, Figure 3 is a front view of the trailing bogie and battery loco seen from the direction indicated by arrow A in Figure 2, Figure 4 is an enlarged side view of the main parts of the area surrounded by the dashed line in the shield tunneling mechanism in Figure 1 after the battery loco has been transported, and Figure 5 is a front view of the trailing bogie seen from the direction indicated by arrow A in Figure 4.

[0023] As shown in Figures 1 to 5, the battery loco charging mechanism CM of this embodiment is a charging mechanism for a battery loco BL that runs along rails RA while towing or pushing multiple transport trolleys TT within an excavation hole DP constructed by a shield tunneling machine S.

[0024] As shown in Figure 1, the shield machine S is, for example, an earth pressure shield machine that excavates the natural ground or the like to construct an excavation pit DP. In this embodiment, "forward" refers to the direction in which the shield machine S excavates (towards the face F), and "rearward" refers to the direction directly opposite to "forward" (towards the starting shaft).

[0025] The excavated soil and sand excavated by the cutter head C of the shield tunneling machine S and taken into the chamber CH of the shield tunneling machine S is subjected to a plastic fluidization treatment, then sent from the screw conveyor SC of the shield tunneling machine S to the transport pipe CT and transported to the soil discharge outlet E behind the transport pipe CT. Segments SG are installed on the inner surface of the excavation hole DP behind the shield tunneling machine S.

[0026] As shown in Figures 1, 2 and 4, multiple trailing bogies FT are arranged in series behind the shield tunneling machine S. These multiple trailing bogies FT are coupled together and are configured to be towed by the shield tunneling machine S so that they can travel along the rails RB. The rails RB are laid in the direction in which the excavation hole DP extends.

[0027] As shown in Figures 3 and 5, each trailing bogie FT has, for example, two bogie main body sections FTs, FTs arranged on both sides of the width direction of the battery loco BL (the horizontal direction perpendicular to the extension direction of the excavation hole DP), and a roof section FTt bridging between the two bogie main body sections FTs, FTs to cover the battery loco BL.

[0028] On the other hand, as shown in Figures 1 to 3, the battery locomotive BL is a locomotive that runs along rails RA by driving a motor (not shown in Figures 1 to 5) using an on-board battery (not shown in Figures 1 to 5) as a power source, and is configured to be able to move both forward and backward. The rails RA are laid along the extension direction of the excavation hole.

[0029] Since the battery locomotive BL is capable of running at a constant commanded speed regardless of the gradient of the road or the load, it is used as a vehicle to move the transport trolley TT, which carries materials such as segments, pipes, rails, and excavated soil, from the starting shaft to the face when constructing an excavation tunnel DP using a shield tunneling machine S.

[0030] As shown in Figures 1 and 2, multiple transport carriages TT are arranged in series behind the battery locomotive BL. These multiple transport carriages TT are connected to each other, and when moving forward (advancing), they are pulled by the battery loco BL, and when moving backward (rearward), they are pushed by the battery loco BL and run along the rails RA. The rails RA are laid along the extension direction of the excavation hole DP.

[0031] Normally, the batteries of a battery locomotive need to be charged after each operation. This is done, for example, by charging a spare battery in the charging space of the departure shaft while the battery loco is operating, and then replacing the depleted battery with a charged spare battery in the charging space of the departure shaft after each operation is completed.

[0032] However, in recent years, as excavation shafts have become longer, the distance excavated per day has increased, and the diameter of excavation shafts has also become larger, the running time, running distance, and weight of battery locators have increased, and the frequency of battery replacement in battery locators has tended to increase.

[0033] For this reason, measures have been taken such as providing a separation point within the excavation shaft, placing chargers and spare batteries within the excavation shaft, and excavating work being carried out while changing batteries. However, this increases costs, takes time to change batteries, and reduces the efficiency of transporting excavated soil and other materials using battery locos.

[0034] Therefore, as shown in Figures 1 to 5, in the battery loco charging mechanism CM of this embodiment, a power supply trolley wire PW is provided on the back surface of the roof portion FTt of the trailing bogie FT, facing the upper surface of the battery loco BL, and a pantograph (current collecting part) PG that contacts the power supply trolley wire PW is provided in a position on the battery loco BL facing the power supply trolley wire PW, and the battery of the battery loco BL is charged through the pantograph PG.

[0035] As a result, in the battery loco charging mechanism CM of this embodiment, the battery of the battery loco BL can be charged through the power supply trolley wire PW while the shield tunneling machine S is excavating, so that the charging state of the battery of the battery loco BL can always be maintained close to fully charged.

[0036] This eliminates the need to move the battery loco BL to a charging space and replace the depleted battery with a charged spare battery to charge the battery of the battery loco BL. This significantly improves the efficiency of transporting excavated soil and other materials using the battery loco BL. Furthermore, there is no need to stop the excavation of the shield tunneling machine S for battery replacement work, and the work involved in constructing the excavation hole DP using the shield tunneling machine S can be reduced, preventing the construction period from being extended.

[0037] Furthermore, because the work of replacing the battery in the battery locomotive BL can be omitted, there is no need to install chargers or spare batteries at the starting shaft or at the separation point, and there is no need to increase the capacity of the battery locomotive BL's battery. This reduces the cost of the battery in the battery locomotive BL, and therefore reduces the construction cost of the excavation tunnel DP using the shield tunneling machine S.

[0038] Furthermore, in the case of a system in which a spare battery is installed for replacement, maintenance such as waterproofing of the spare battery is required, but in the battery loco charging mechanism CM of this embodiment, the spare battery can be omitted, thereby simplifying the maintenance of the battery loco charging mechanism CM.

[0039] Furthermore, in the battery loco charging mechanism CM of this embodiment, the battery of the battery loco BL can be charged in the trailing bogie FT, which must pass through when transporting materials, excavated earth, etc., so the battery of the battery loco BL can be charged regardless of the excavation distance, diameter, shaft size, etc. of the excavation hole. In other words, it can be widely applied to various situations, such as when the excavation hole is long or has a large diameter.

[0040] Next, referring to Figures 6 and 7, we will explain an example of the configuration of the power supply trolley wire PW arranged on the trailing bogie FT, using the example where the transport bogie TT carried by the battery loco BL is a so-called muck bogie that loads excavated soil.

[0041] Figure 6 is an enlarged side view of the main parts of the battery locomotive and the transport cart at the start of loading of excavated earth, and Figure 7 is an enlarged side view of the main parts of the battery locomotive and the transport cart at the end of loading of excavated earth.

[0042] 6 and 7, the power supply contact wire PW is provided across the trailing bogies FT, extending in the coupling direction of the trailing bogies FT (the excavation direction of the shield machine S, the extension direction of the excavation hole DP). That is, the power supply contact wire PW is provided in a state extending along the excavation direction of the shield machine S from the position where the pantograph PG of the battery loco BL contacts the power supply contact wire PW when the first loading bogie TT3 of the trailing bogies TT (TT1 to TT3) is located directly below the earth and sand discharge opening E (see FIG. 6), to the position where the pantograph PG of the battery loco BL contacts the power supply contact wire PW when the last loading bogie TT1 of the trailing bogies TT (TT1 to TT3) is located directly below the earth and sand discharge opening E (see FIG. 7).

[0043] This allows the pantograph PG of the battery loco BL to be continuously connected to the power supply trolley wire PW when the battery loco BL is stopped and moving from the start to the end of loading excavated earth onto the transport cart TT, and the battery can be continuously charged from the power supply trolley wire PW via the pantograph PG. In other words, since the battery of the battery loco BL can be charged when excavated earth is loaded onto the transport cart TT carried by the battery loco BL, the battery charge state of the battery loco BL can always be maintained at a state close to full charge.

[0044] In addition, power is supplied to the power supply contact wire PW of the trailing bogie FT directly from the underground wiring installed in the excavation hole DP.

[0045] Next, a configuration example of the battery loco BL will be described with reference to FIGS.

[0046] 8 is a plan view of an example of the battery loco of FIG. 1, FIG. 9 is a side view of the battery loco of FIG. 8, and FIG. 10 is a front view of the battery loco as seen from the direction indicated by arrow A in FIG.

[0047] As shown in Figures 8 to 10, four rotatable wheels W are attached to the bottom of the loco main body BLb that constitutes the battery loco BL. The four wheels W roll, allowing the battery loco BL to travel on the rails RA.

[0048] 9 and 10, a sprocket wheel SW is rotatably mounted between the front and rear wheels W at the bottom of the locomotive body BLb. This sprocket wheel SW is configured to mesh with a pin rack rail RC arranged between a pair of rails RA. The pin rack rail RC is laid extending along the extension direction of the excavation hole DP (see Figure 1, etc.).

[0049] As shown in Figures 8 and 9, the loco body BLb contains a motor M that rotates the wheels W, a servo driver circuit SD that controls the operation of the motor M, and other components. The motor M is configured as a servo motor, for example. By configuring the motor M as a servo motor in this way, the battery loco BL can travel at a speed commanded by a control circuit (not shown in Figures 8 to 10) without being affected by the weight of the battery loco BL or the gradient of the road, and the battery loco BL can be operated safely regardless of the driver's skill level.

[0050] As shown in Figures 8 and 9, a counterweight CW, a pantograph PG, a battery B, and an operating unit CC are installed on the top surface of the locomotive body BLb, in this order from front to rear. The counterweight CW is a component for balancing the weight with the battery B.

[0051] As shown in FIGS. 8 to 10, the pantograph PG is a mechanical part electrically connected to the above-mentioned power supply trolley wire PW, and is placed on a platform MS on the upper surface of the locomotive body BLb.

[0052] The pantograph PG is provided with a mechanism that moves the contact portion PGc of the pantograph PG upward to press the contact portion PGc against the power supply trolley wire PW (see Figures 1 to 5, etc.). The pantograph PG is also provided with a spring mechanism (not shown) or the like that applies an upward biasing force to the contact portion PGc of the pantograph PG. This ensures that the contact portion PGc of the pantograph PG firmly contacts the power supply trolley wire PW.

[0053] As shown in Figures 8 and 9, the battery B is a power source for driving the battery loco BL, and is installed replaceably on the top surface of the loco body BLb. This battery B is electrically connected to the above-mentioned motor M, servo driver circuit SD, and various other circuits and electrical devices. The battery B is also electrically connected to the pantograph PG, and is charged when the contact part PGc of the pantograph PG comes into contact with the power supply trolley wire PW.

[0054] In this embodiment, the battery B is, for example, a lithium-ion battery. While lead-acid batteries are also used as storage batteries, they cannot be charged inside the excavation hole because hydrogen is generated during charging. Even if the problem of hydrogen generation were resolved, increasing the capacity of a lead-acid battery would increase its own weight, and the capacity of the motor M would also need to be increased, resulting in battery shortages, making it unsuitable for long-distance driving due to limitations.

[0055] In contrast, lithium-ion batteries do not generate hydrogen during charging, so they can be charged inside the borehole DP (see Figures 1 to 5, etc.). Furthermore, lithium-ion batteries require less capacity than lead-acid batteries, making them suitable for long-distance driving, and they can be charged more quickly than lead-acid batteries.

[0056] Next, FIG. 11 is a schematic circuit diagram of a main part of an example of a charging mechanism for a battery locomotive.

[0057] The power supply trolley wire PW is electrically connected to the rectifier circuit RC through the pantograph PG of the battery locomotive BL. Here, a case where three-phase AC power is supplied from the power supply trolley wire PW to the pantograph PG is illustrated. However, this is not limited to this, and DC power can also be supplied, for example.

[0058] The rectifier circuit RC rectifies the three-phase AC power supplied from the pantograph PG into DC power. The battery B is electrically connected between the high-potential wiring LH and the low-potential wiring LL that make up the output wiring L of the rectifier circuit RC, and the battery B is charged by the DC power sent from the rectifier circuit RC.

[0059] Furthermore, a servo driver circuit SD is electrically connected to the output wiring L of the rectifier circuit RC downstream of the battery B. The servo driver circuit SD is a circuit that converts DC power sent from the rectifier circuit RC or the battery B into three-phase AC power.

[0060] The output of this servo driver circuit SD is electrically connected to a motor M. The motor M is an electric motor that drives the wheels W (see Figures 8 to 10) of the battery locomotive BL described above, and is configured to be driven by three-phase AC power sent from the servo driver circuit SD.

[0061] Furthermore, in the downstream of the servo driver circuit SD, a converter circuit CV is electrically connected to the output wiring L of the rectifier circuit RC. This converter circuit CV is a DC-DC converter circuit that converts the DC power sent from the rectifier circuit RC or the battery B into DC power of a predetermined value.

[0062] The output of this converter circuit CV is electrically connected to a control power supply circuit CP, which is a power supply circuit that supplies DC power sent from the converter circuit CV as a control power supply mainly to a control circuit MC.

[0063] The control circuit MC is a circuit that controls the operation of each circuit, switch, etc. For example, the control circuit MC controls the operation of the motor M so that the traveling speed of the battery loco BL is constant regardless of the weight of the vehicle body or the gradient of the road, by controlling the switching operation of the servo driver circuit SD, and controls the operation of the breaker circuit and switch (not shown) installed in the wiring to supply and stop the supply of power, thereby controlling the operation of the battery loco BL.

[0064] Next, an example of a method for charging the battery loco BL by the battery loco charging mechanism CM of this embodiment will be described with reference to FIGS.

[0065] Figures 12 to 17 are side views of the main part of the excavation process of the shield tunneling machine in which the charging mechanism of the battery locomotive in Figure 1 is installed. In Figures 12 to 17, the coordinate X is shown so that the relative positional relationship of the shield tunneling machine S and the pantograph PG of the battery locomotive BL can be seen in each figure.

[0066] As shown in Figure 12, behind the shield tunneling machine S, multiple trailing bogies FT are lined up in series and coupled together on rails RB. A power supply contact wire PW is installed so that it extends from the foremost trailing bogie FT among the multiple trailing bogies FT to the third trailing bogie FT rearward. The coordinate Xa1 indicates the front position of the cutter head C that constitutes the shield tunneling machine S at this stage.

[0067] First, as shown in Figure 13, the battery locomotive BL is carried into the excavation hole DP. Behind the battery loco BL, for example, three transport carts TT (TT1 to TT3) for transporting excavated earth and sand are arranged in series and connected to each other, and are towed by the battery loco BL. In this case, the battery loco BL runs using the power discharged from the battery B as its driving source.

[0068] Next, when the last transport cart (the transport cart that starts loading) TT3 is positioned directly below the soil discharge outlet E, the battery locomotive BL stops moving.

[0069] After that, the shield tunneling machine S starts excavating. The excavated soil produced by the shield tunneling machine S is transported to the soil discharge outlet E via the screw conveyor SC and the transport pipe CT, and loaded onto the last transport cart TT3.

[0070] Furthermore, after the shield tunneling machine S starts excavating, the contact part PGc (see Figures 8 to 10) of the pantograph PG of the battery loco BL is raised and pressed against the power supply contact wire PW, electrically connecting the pantograph PG to the power supply contact wire PW. Then, electricity supplied from the power supply contact wire PW through the pantograph PG is supplied to the battery B of the battery loco BL, thereby starting to charge the battery B. The coordinate Xb1 indicates the contact position between the contact part PGc of the pantograph PG of the battery loco BL and the power supply contact wire PW at this stage.

[0071] Next, as shown in Figure 14, when the shield tunneling machine S has advanced a predetermined distance, it stops excavating. In other words, when the amount of excavated earth loaded onto the last transport vehicle TT3 reaches a predetermined amount, the shield tunneling machine S stops excavating. Note that, although not particularly limited, the predetermined excavation distance here is, for example, about 340 mm.

[0072] Next, the battery loco BL is made to travel backward, pushing the three transport trolleys TT (TT1 to TT3), and the battery loco BL stops traveling when the middle transport trolley TT2 is positioned directly below the soil discharge outlet E. Note that the coordinate Xb2 indicates the contact position between the contact part PGc of the pantograph PG of the battery loco BL and the power supply contact wire PW at this stage.

[0073] At this time, the battery loco BL is run with the contact part PGc of the pantograph PG of the battery loco BL in contact with the power supply contact wire PW. In other words, the battery loco BL is run with the pantograph PG electrically connected to the power supply contact wire PW. This allows the battery B of the battery loco BL to be charged even while the battery loco BL is running.

[0074] At this time, the battery locomotive BL runs using the power supplied from the power supply trolley wire PW as its driving source, rather than the power discharged from the battery B.

[0075] After that, the shield tunneling machine S starts excavating. The excavated soil produced by the shield tunneling machine S is transported to the soil discharge outlet E via the screw conveyor SC and the transport pipe CT, and loaded onto the intermediate transport cart TT2.

[0076] Next, as shown in Figure 15, the shield tunneling machine S stops excavating when it has advanced a predetermined distance. In other words, the shield tunneling machine S stops excavating when the amount of excavated earth loaded onto the intermediate transport cart TT2 reaches a predetermined amount. Although not particularly limited, the predetermined excavation distance here is, for example, about 340 mm, and the front position of the cutterhead C of the shield tunneling machine S is a position about 680 mm from the excavation start coordinate Xa1.

[0077] Next, the battery loco BL is made to travel backward, pushing the three transport trolleys TT (TT1 to TT3) until the front transport trolley TT1 (the transport trolley that has finished loading) is positioned directly below the soil discharge outlet E, at which point the battery loco BL stops traveling. Note that the coordinate Xb3 indicates the contact position between the contact part PGc of the pantograph PG of the battery loco BL and the power supply contact wire PW at this stage.

[0078] In this case, as described above, the contact portion PGc of the pantograph PG of the battery loco BL is brought into contact with the power supply trolley wire PW, and the battery loco BL is run with the pantograph PG electrically connected to the power supply trolley wire PW, thereby charging the battery B of the battery loco BL even while the battery loco BL is running.

[0079] At this time, the battery locomotive BL runs using the power supplied from the power supply trolley wire PW as its driving source, rather than the power discharged from the battery B.

[0080] After that, the shield tunneling machine S starts excavating. The excavated soil produced by the shield tunneling machine S is transported to the soil discharge outlet E via the screw conveyor SC and the transport pipe CT, and loaded onto the transport cart TT1 in the front row.

[0081] Next, as shown in Figure 16, when the shield tunneling machine S has advanced a predetermined distance, it stops its excavation. In other words, when the amount of excavated earth loaded onto the front transport cart TT1 reaches a predetermined amount, it stops its excavation. Note that, although not particularly limited, the predetermined excavation distance here is, for example, about 340 mm.

[0082] Here, coordinate Xa2 indicates the front position of cutter head C of shield tunneling machine S at this stage, and the distance from coordinate Xa1 to coordinate Xa2 is, for example, about 1000 mm. The excavation time for this shield tunneling machine S to excavate from coordinate Xa1 to coordinate Xa2 is, for example, about 30 minutes, during which time battery B of battery loco BL can be charged.

[0083] Next, the pantograph PG of the battery loco BL is lowered to separate the contact portion PGc of the pantograph PG from the power supply trolley wire PW, i.e., the current flow between the pantograph PG and the power supply trolley wire PW is released.

[0084] After that, the battery locomotive BL is made to travel backward, pushing the transport carts TT (TT1 to TT3) loaded with excavated soil and carrying them to the starting shaft. At this time, the motor B of the battery loco BL is driven by the DC power supplied from the battery B, causing the battery loco BL to travel.

[0085] Furthermore, a new segment SGn is assembled on the inner wall surface of the excavation hole DP according to the usual method of shield tunneling, as shown in Figure 17. By repeating the above process, the charge state of battery B of the battery loco LB can be maintained at a state close to full charge at all times.

[0086] In addition, the work of replacing the battery B of the battery locomotive BL can be omitted, which significantly improves the transportation efficiency of the battery locomotive BL. Furthermore, there is no need to stop the excavation of the shield tunneling machine S for battery replacement work, and the work involved in constructing the excavation hole DP using the shield tunneling machine S can be reduced, preventing the construction period from being extended.

[0087] Furthermore, there is no need to install chargers or spare batteries at the starting shaft or at the joining and leaving points, and there is no need to increase the capacity of the battery B of the battery locomotive BL, so the cost of the battery B of the battery locomotive BL can be reduced. Therefore, the construction cost of the excavation tunnel DP using the shield tunneling machine S can be reduced.

[0088] Furthermore, since the spare battery can be omitted, maintenance and management of the battery loco charging mechanism CM can be simplified.

[0089] Furthermore, the battery B of the battery loco BL can be charged regardless of the excavation distance, diameter, shaft size, etc. of the excavation hole. In other words, it can be widely applied to various situations, such as excavation holes with longer distances and larger diameters.

[0090] While the above explanation is for the application of the present invention to an earth pressure shield machine, the present invention can also be applied to a slurry shield machine. Compared to an earth pressure shield machine, a slurry shield machine requires a larger number of trailing bogies, and the distance from the leading trailing bogie to the trailing trailing bogie is considerably longer. By installing a power supply contact wire extending from the leading trailing bogie to a predetermined number of trailing bogies or to the trailing bogie, it becomes possible to charge the battery locomotive, including the time it takes to unload segments, etc.

[0091] The invention made by the inventor has been specifically described above based on the embodiments, but the embodiments disclosed in this specification are illustrative in all respects and are not limited to the disclosed technology. In other words, the technical scope of the present invention should not be interpreted restrictively based on the description of the above embodiments, but should be interpreted solely in accordance with the claims, and includes technologies equivalent to the technologies described in the claims and all modifications that do not deviate from the gist of the claims.

[0092] In the above embodiment, an example is given of a trailing bogie having a bogie main body portion on both sides of the width of the battery loco, but this is not limited to this. For example, as shown in Figure 18, a trailing bogie FT may be used that has a bogie main body portion FTs on only one side of the width of the battery loco BL and has a roof portion FTt that extends in a cantilevered manner from the top of the bogie main body portion FTs to cover the battery loco BL.

[0093] In addition, in the above embodiment, an example is given of a case in which a pantograph is provided on the top surface of the battery locomotive and a power supply trolley wire is provided on the roof of the trailing bogie on the surface opposite the pantograph, but this is not limited to this.For example, a configuration in which a pantograph is provided on the side of the battery locomotive and a power supply trolley wire is provided on the side of the trailing bogie opposite the pantograph may also be used. [Industrial Applicability]

[0094] In the above explanation, the present invention is applied to a shield machine, but the present invention can also be applied to a tunnel boring machine or the like. [Explanation of symbols]

[0095] CM Battery Loco Charging Mechanism BL Battery Locomotive BLb locomotive body PG pantograph (current collecting part) PGc contact part B. Battery SD servo driver circuit Medium motor RC rectifier circuit L Output wiring LH High potential output wiring LL Low potential output wiring CV converter circuit CP control power circuit MC control circuit CW Counterweight CC operation section W wheels SW sprocket wheel TT transport cart TT1 Transport cart (loaded transport cart) TT2 transport cart TT3 Transport cart (transport cart at the beginning of loading) S Shield tunneling machine FT trailing bogie FTs bogie body FTt roof section PW power supply contact wire DP drilling hole RA,RB rail RC pin rack rail F Face SG,SGn segments

Claims

1. A method for charging a battery loco, characterized by charging the battery by electrically connecting a collector part provided on a battery loco that moves multiple transport carts within an excavation tunnel constructed by a shield tunneling machine while connected to the battery of the battery loco to a power supply trolley wire provided on a trailing cart that is towed behind the shield tunneling machine and extending along the excavation direction of the shield tunneling machine.

2. The shield machine is an earth pressure shield machine, A charging method for a battery loco as described in claim 1, characterized in that the battery loco sequentially moves multiple transport carts directly below the soil discharge outlet section from which the excavated soil excavated by the shield tunneling machine is discharged, and while the excavated soil discharged from the soil discharge outlet section is sequentially loaded onto the multiple transport carts, the power collecting part of the battery loco is kept electrically connected to the power supply trolley wire of the trailing cart, thereby continuing to charge the battery.

3. The transport carriage is a carriage that is connected in plurality along the excavation direction of the shield tunneling machine and that loads excavated soil discharged from a soil discharge outlet provided on the trailing carriage, A method for charging a battery loco as described in claim 2, characterized in that the power supply trolley wire is arranged in a state where it extends from a position where the current collecting part contacts the power supply trolley wire when the transport cart that is starting to be loaded among the multiple transport carts is directly below the soil discharge outlet to a position where the current collecting part contacts the power supply trolley wire when the transport cart that is finishing being loaded among the multiple transport carts is directly below the soil discharge outlet.

4. 4. A method for charging a battery locomotive according to claim 1, wherein the battery is a lithium ion battery.

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