Rail transportation truck and rail transportation device

Abstract

To enable enhancement of safety when the angle of a load-carrying platform is changed.SOLUTION: A rail transportation truck 4 traveling on a rail 2 comprises: a truck body 41; a wheel 42 provided on the lower surface of the truck body 41 and rolling on the rail 2; a load-carrying platform 43 provided on the truck body 41 so as to be displaceable; a load-carrying platform shaft support 44 that rotatably supports the load-carrying platform 43 with respect to the truck body 41 at the front end of the truck body 41 and the front end of the load-carrying platform 43; an actuator 61 which is interposed between the truck body and the load-carrying platform and connected at one end to the truck body 41 and at the other end to the load-carrying platform 43, and hydraulically driven to elongate / contract; a hydraulic drive unit 60 that drives the actuator 61 to elongate / contract; a generator 5 that is disposed at the rear end of the truck body 41 and supplies power to the hydraulic drive unit 60; and an operation unit 7 that operates the generator 5. The operation unit 7 is disposed at the front end of the truck body 41 or the front end of the load-carrying platform 43.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] This invention relates to, for example, a rail carrier for transporting objects along rails laid on sloping ground, and a rail transport device.

Background Art

[0002] Conventionally, a rail transporter has been used for transporting objects on sloping ground such as in mountain forests. For example, a rail transporter has been proposed that includes a tractor that travels on rails installed on sloping ground, and a transport cart that is connected to the tractor and travels on the rails together with the tractor (see Patent Document 1).

[0003] The transport cart described in Patent Document 1 includes a cart body provided with wheels that roll on the rails, a loading platform provided on the cart body, and a connection mechanism that connects the cart body and the loading platform.

[0004] The connection mechanism in the transport cart described in Patent Document 1 includes a telescopic actuator, four pivot support means, and a release means for releasing the connection by each pivot support means to put it in a non-connected state. In the transport cart described in Patent Document 1, the angle of the loading platform can be appropriately changed by appropriately controlling the telescopic actuator and the connection mechanism.

[0005] However, in the transport cart described in Patent Document 1, when changing the angle of the loading platform, it is necessary to extend the telescopic actuator by pushing up the rear end of the loading platform, etc., and work near the rear end of the loading platform that undergoes large displacement is required, so there is a problem from the viewpoint of safety during work.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] The present invention has been made in view of the above problems, and an object thereof is to provide a rail transport cart and a rail transport device that improve safety when changing the angle of a loading platform.

Means for Solving the Problems

[0008] The present invention is a rail transport cart that travels on a rail installed on a slope, comprising a cart body, wheels provided on the lower surface of the cart body that roll on the rail, a loading platform displaceably provided on the cart body, a loading platform shaft support portion that pivotally supports the loading platform relative to the cart body at both front end portions of the cart body and the loading platform, an actuator having one end connected to the upper surface of the cart body and the other end connected to the lower surface of the loading platform and being driven to expand and contract hydraulically, a hydraulic drive portion that drives the actuator to expand and contract, a generator disposed at the rear end portion of the cart body that supplies power to the hydraulic drive portion, and an operation portion for operating the generator, wherein the operation portion is disposed at the front end portion of the cart body or the front end portion of the loading platform. The present invention is characterized by being a rail transport cart and a rail transport device.

Effects of the Invention

[0009] According to the present invention, it is possible to provide a rail transport cart and a rail transport device that improve safety when changing the angle of a loading platform.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory drawing showing the configuration of the track transportation system 1 of the present invention on flat ground (when the track 2 is installed on flat ground). FIG. 2 is an explanatory drawing showing the configuration of the track transportation system 1 of the present invention when the loading platform is lifted up. FIG. 3 is an explanatory drawing showing the configuration of the track carriage 4 and the operation unit 7 of the present invention. FIG. 4 is an explanatory drawing showing the configuration of the track carriage 4 and the operation unit 7 on a slope.

[0012] As shown in FIGS. 1 and 2, the track transportation system 1 of the present embodiment has a tractor (track transporter) 3 that travels on the track 2 and a track carriage 4 that is towed by the tractor 3 and travels on the track 2.

[0013] In addition, the track 2 is mainly installed on slopes such as mountain forests where ordinary automobiles and ordinary railway vehicles cannot travel. That is, between the starting point and the destination of the track 2, there may be flat ground, but there is at least a part of the slope. Also, the inclination angle of the ground where the track 2 is installed often changes from the starting point to the destination. Also, there are cases where the starting point or the destination is a slope. Therefore, there is a section where the tractor 3 and the track carriage 4 are in an inclined state between the starting point and the destination.

[0014] The track 2 determines the traveling direction of the tractor 3 and the track carriage 4 by engaging with the tractor 3 and the track carriage 4, and is configured as a part of the track unit 2U.

[0015] Note that the form of the track 2 is not particularly limited as long as it is commonly used in the field of track transportation systems. The track 2 may be a single track (monorail) or a plurality of tracks.

[0016] The track unit 2U of this embodiment includes a track 2, a support mechanism 20 for supporting the track 2 from the ground, and an auxiliary rail 21 supported by the support mechanism 20 and receiving the loads of the towing vehicle 3 and the track carrier 4 from both sides of the track 2.

[0017] The track 2 is formed in a square pipe shape (square tubular shape) having a rectangular cross-sectional view. The track 2 is formed in a rectangular cross-sectional view, for example, by extrusion of steel materials, or is formed into a rectangular cross-sectional view by bending a long steel plate.

[0018] A plurality of engaging holes having a perfect circular shape in bottom view (plan view) are provided on the upper surface or the bottom surface of the track 2. Further, the plurality of engaging holes are provided at equal intervals in the extending direction (axial direction) of the track 2. The engaging holes are assumed to have a perfect circular shape in bottom view, but may be formed to have an elliptical shape or a rectangular shape. Instead of the plurality of engaging holes, irregularities provided at equal intervals alternately in the extending direction (axial direction) of the track 2 may be provided on the upper surface or the bottom surface of the track 2.

[0019] The auxiliary rail 21 is formed in a substantially circular cross-sectional shape, and is formed, for example, in a round pipe shape made of metal or a solid round bar shape. The auxiliary rails 21 are arranged in pairs at a predetermined interval from the track 2. Specifically, the auxiliary rails 21 are arranged on the left and right sides with the track 2 as the center when viewed from the extending direction of the track 2 (the traveling direction of the towing vehicle 3 and the track carrier 4).

[0020] Further, the upper surface (upper end portion) of the auxiliary rail 21 is located below the track 2. Furthermore, the upper surface side of the auxiliary rail 21 is a curved surface, and the running surface of the auxiliary wheels that run and turn on the auxiliary rail 21 of the towing vehicle 3 and the track carrier 4 is a curved surface. Therefore, even if the towing vehicle 3 and the track carrier 4 generate some lateral play during running, the towing vehicle 3 can be stably supported.

[0021] The support mechanism 20 is formed in a rod shape, column shape, or cylindrical shape, and a plurality of them are arranged at appropriate intervals in the extending direction of the rail 2. The lower end portion of the support mechanism 20 is grounded to the ground, and supports the rail 2 and the auxiliary rail 21 at respective required positions and orientations.

[0022] And in this embodiment, a towing vehicle 3 and a rail carrier 4 are placed on the rail 2 of such a rail unit 2U so as to be able to travel. That is, the towing vehicle 3 and the rail carrier 4 are movable between a starting point and a destination by traveling on the rail 2.

[0023] The towing vehicle 3 is a transporter (power vehicle) that travels on the rail 2 laid on an inclined ground, and has a main body 31, drive wheels 32 that engage with the rail 2, and auxiliary wheels (not shown) that run and turn on the auxiliary rail 21. The main body 31 has a substantially rectangular parallelepiped shape in appearance. A prime mover (engine or motor) as a power source is accommodated in the main body 31. Further, a fuel tank, a battery, etc. for supplying fuel or electric power to the power source are mounted on the main body 31.

[0024] Also, behind the main body 31, a seat 33 for a driver who drives the towing vehicle 3 to sit is provided. The seat 33 is provided in a posture inclined at a certain angle with respect to the main body 31 so as to conform to the inclination of the ground. Note that the seat 33 may have a function of appropriately changing or adjusting the angle of inclination with respect to the main body 31. Also, a driving operation unit (not shown) for driving the towing vehicle 3 is provided corresponding to the position of the seat 33.

[0025] Furthermore, the main body 31 is provided with a power transmission mechanism that converts the output of the power source into an appropriate speed and torque and transmits it to the drive wheels 32. Also, a plurality of engaging protrusions are formed on the outer periphery of the drive wheels 32 at the same intervals as the engaging holes of the rail 2. The towing vehicle 3 can stably move forward, backward, and stop without slipping off even on an inclined surface by the engaging protrusions of the drive wheels 32 engaging with the engaging holes of the rail 2 and rotating.

[0026] The tractor 3 and the track carrier truck 4 are mechanically connected by a rod-shaped, columnar or cylindrical connecting member 34. For this reason, the track carrier truck 4 moves forward, backward, and stops in conjunction with the movement of the tractor 3. Therefore, the tractor 3 and the track carrier truck 4 constitute a track transport device that moves integrally.

[0027] The auxiliary wheels are provided on both sides of the drive wheel 32 so as to be aligned with the position of the auxiliary rail 21 in a front view. The dimensions of the auxiliary wheels in a plan view are set to be wider than the auxiliary rail 21, preferably, for example, more than three times wider, so that they can be suitably supported by the auxiliary rail 21 even if they are slightly displaced laterally (in the width direction or the left-right direction), and the displacement can quickly return.

[0028] Hereinafter, the direction in which the tractor 3 exists as viewed from the track carrier truck 4 is defined as the front (the traveling direction of the tractor 3 and the track carrier truck 4), the direction in which the track carrier truck 4 exists as viewed from the tractor 3 is defined as the rear (the backward direction of the tractor 3 and the track carrier truck 4), and the vertical direction is defined as the downward direction to describe the track carrier truck 4.

[0029] As shown in FIGS. 1 to 4, the track carrier truck 4 includes a truck body 41, wheels 42 provided on the lower surface of the truck body 41, a load platform 43 provided displaceably on the truck body 41, a load platform shaft support portion 44 that pivotally supports the load platform 43 with respect to the truck body 41, and a generator shaft support portion 45 that pivotally supports a generator 5 (a generator frame 5a that holds the generator 5).

[0030] The track carrier truck 4 is a so-called lifter truck that can displace (lift up and lift down) the load platform 43 with respect to the truck body 41. The track carrier truck 4 is provided with a generator 5 and a lift mechanism 6 that is operated by a power source supplied from the generator 5.

[0031] The carriage body 41 is for supporting each component of the rail carriage 4. The outer contour of the carriage body 41 is formed in a rectangular shape in plan view. The carriage body 41 has a frame structure formed by combining a plurality of columnar or cylindrical rod-shaped members. Although not shown, for example, the carriage body 41 is formed of a rectangular outer contour portion formed of rod-shaped members and beam portions provided so as to connect between opposite surfaces or diagonals of the outer contour portion.

[0032] Further, the carriage body 41 has recesses 41a recessed downward at the central portion in the front-rear direction and the central portion in the left-right direction. The bottom surface of the recess 41a is formed in a substantially rectangular shape, and the side surface of the recess 41a is an inclined surface that slopes upward with the bottom surface as a base point. Due to this recess 41a, a concave space in the shape of an inverted frustum of a cone is formed on the upper surface of the carriage body 41.

[0033] The wheels 42 are provided on the lower surface of the carriage body 41 and roll on the rails 2. The wheels 42 include a front wheel 42a provided on the lower surface of the front side of the carriage body 41 and a rear wheel 42b provided on the lower surface of the rear side of the carriage body 41. The front wheel 42a is located at least in front of the recess 41a, and the rear wheel 42b is located at least behind the recess 41a. Further, the front wheel 42a is provided on a front trolley 42A that is rotatable in the plane direction with respect to the carriage body 41, and the rear wheel 42b is provided on a rear trolley 42B that is rotatable in the plane direction with respect to the carriage body 41. Thereby, even when the rail 2 is bent, the front trolley 42A and the rear trolley 42B rotate with respect to the carriage body 41 along the bend, and the wheels 42 can run smoothly without falling off.

[0034] The loading platform 43 is provided on the carriage body 41 so as to be displaceable relative to the carriage body 41, and functions as a platform for loading objects or a platform for people to ride on during work. The loading platform 43 has a lower frame formed in a rectangular shape in plan view and upright frames rising upward from the front and rear side portions of the lower frame respectively. The loading platform 43 (lower frame) is pivotally supported by a loading platform shaft support portion 44.

[0035] The loading platform shaft support 44 pivotally supports the loading platform 43 with respect to the carriage body 41 at the front end of the carriage body 41 and the front end of the loading platform 43. Specifically, the loading platform shaft support 44 pivotally supports the loading platform 43 relative to the carriage body 41 about an axis (first axis) that extends in a direction perpendicular to the extending direction of the rail 2 (the traveling direction of the tractor 3 and the rail carrier 4) in a plan view and is substantially horizontal with respect to the ground.

[0036] For example, the loading platform shaft support 44 has a columnar or cylindrical shaft portion extending along the first axis, and a fitting portion having a through hole or a U-shaped groove that is rotatably fitted to the shaft portion. In the present embodiment, fitting portions (for example, through holes) are formed in both the carriage body 41 and the loading platform 43, and the loading platform shaft support 44 is formed by inserting a shaft member through the through holes of the carriage body 41 and the loading platform 43.

[0037] The generator shaft support 45 pivotally supports the generator 5 with respect to the carriage body 41 at the rear end of the carriage body 41. The generator shaft support 45 and the generator 5 are located behind the loading platform 43. The generator shaft support 45 and the generator 5 are arranged at a distance such that the generator 5 and the loading platform 43 do not collide even when the generator 5 rotates. Specifically, the generator shaft support 45 pivotally supports the generator 5 relative to the carriage body 41 about an axis (second axis) that extends in a direction perpendicular to the extending direction of the rail 2 (the traveling direction of the tractor 3 and the rail carrier 4) in a plan view and is substantially horizontal with respect to the ground.

[0038] For example, the generator shaft support 45 has a columnar or cylindrical shaft portion extending along the second axis, and a fitting portion having a through hole or a U-shaped groove that is rotatably fitted to the shaft portion. In the present embodiment, a shaft portion is provided on the carriage body 41 (generator shaft support 45) side, and a fitting portion having a U-shaped (inverted U-shaped) groove that is open downward is provided on the generator 5 (generator frame 5a) side. Note that a fitting portion may be provided on the carriage body 41 (generator shaft support 45) side and a shaft portion may be provided on the generator 5 (generator frame 5a) side.

[0039] The generator shaft support 45 is disposed above the vertical center of the generator 5 and above the center of gravity of the generator 5. Note that the center of gravity position of the generator 5 refers to the center of gravity position when not only the generator 5 but also other members fixed to the generator 5, such as the generator frame 5a holding the generator 5 and the fuel tank storing the fuel of the generator 5, are included. Further, when the fuel tank is filled with fuel, it refers to the center of gravity position when the fuel is also included.

[0040] Here, as shown in FIG. 4, since the generator shaft support 45 is disposed above the center of gravity position of the generator 5, when the carriage body 41 tilts, the generator 5 rotates relative to the carriage body 41 so that the center of gravity position of the generator 5 is located directly below the generator shaft support 45. That is, the generator 5 is in a state of being tilted by a predetermined angle with respect to the carriage body 41. For example, as shown in FIG. 4, when the rail 2 is installed so as to tilt at a predetermined inclination angle, the carriage body 41 also assumes a posture tilted at the same inclination angle as compared with the case of a flat ground. At this time, the generator 5 is in a state of being tilted at an angle approximately equal to the inclination angle with respect to the carriage body 41 as compared with the case of a flat ground (see FIGS. 1 to 3). That is, the generator 5 is maintained in a horizontal state or a state close thereto even when the carriage body 41 is tilted. This is the same even when the inclination angle of the carriage body 41 (rail 2) changes, and the generator 5 is maintained in a horizontal state or a state close thereto regardless of the inclination angle of the carriage body 41.

[0041] As described above, the generator 5 is configured to rotate relative to the carriage body 41 about the second axis according to the inclination angle of the carriage body 41 (rail 2) by the action of the generator shaft support 45 and to be maintained in a horizontal state or a state close thereto by its own weight.

[0042] The generator 5 supplies power to the lift mechanism 6. The generator 5 is a motor-generator that generates electricity by burning fuel such as light oil (diesel), gasoline, or gas, and has a manual intake air amount adjuster 51 for adjusting the intake air amount of the motor-generator. Although illustration is omitted, the intake air amount adjuster 51 has a lever (choke lever) for adjusting the intake air amount. The choke lever is configured to tilt within a predetermined range. The generator 5 is configured such that the intake air amount is adjusted according to the position (tilting angle) of the choke lever. For example, the choke lever is configured to tilt between a position where the intake air amount is maximum (open position) and a position where the intake air amount is minimum (closed position), and can be adjusted to an arbitrary angle (intake air amount) by manual operation.

[0043] The lift mechanism 6 has a hydraulic drive unit 60 and an actuator 61. The hydraulic drive unit 60 controls the supply amount of hydraulic oil into the actuator 61 to drive the actuator 61 to expand and contract. The hydraulic drive unit 60 has a tank for storing hydraulic oil, a hydraulic pump for sending the hydraulic oil into the actuator 61, and the like. The hydraulic drive unit 60 is housed in a concave space formed by a concave portion 41a on the upper surface of the carriage body 41. That is, the concave portion 41a also functions as a hydraulic drive unit housing portion for housing the hydraulic drive unit 60. The lift mechanism 6 having the hydraulic drive unit 60 and the actuator 61 has all elements arranged between the front trolley 42A and the rear trolley 42B of the carriage body 41. Thereby, the stability during traveling and the stability during the lift operation are ensured, and the lifting force (lifting and lowering force) in the lift operation is ensured.

[0044] The actuator 61 has a telescopic structure in which overlapping cylinders expand and contract, and the distance between both ends of the actuator 61 (the length of the actuator 61) can be changed (extended and contracted driven) by hydraulic pressure. The actuator 61 is interposed between the carriage body 41 and the loading platform 43, with one end connected to the carriage body 41 and the other end connected to the loading platform 43. Specifically, one end of the actuator 61 is rotatably connected to the upper surface of the carriage body 41, and the other end of the actuator 61 is rotatably connected to the lower surface of the loading platform 43.

[0045] Specifically, one end of the actuator 61 is connected to the central portion in the front-rear direction of the upper surface of the carriage body 41. The other end of the actuator 61 is connected to the rear end portion of the lower surface of the loading platform 43. The central portion of the carriage body 41 to which one end of the actuator 61 is connected can be within 1 / 4 of the front-rear length from the center position in the front-rear direction of the carriage body 41, preferably within 1 / 8, and preferably at the center position. Also, the rear end portion of the loading platform 43 to which the other end of the actuator 61 is connected can be within 1 / 4 of the rearward direction in the front-rear direction of the loading platform 43, and preferably within 1 / 8. By doing so, the stability in the lift operation and the lifting force (lifting and lowering force) in the lift operation are ensured.

[0046] Therefore, when the actuator 61 extends, the rear end portion of the loading platform 43 is displaced in a direction away from the bogie body 41 (the rear end portion is lifted). As described above, the loading platform 43 is pivotally supported by a loading platform shaft support portion 44 with respect to the bogie body 41 so as to be rotatable at the front end portion. For this reason, as shown in FIG. 2, when the actuator 61 extends, the loading platform 43 rotates about the first axis (the front end portion of the loading platform 43) and assumes a posture inclined with respect to the bogie body 41. In the present embodiment, the inclination angle (maximum inclination angle) of the loading platform 43 with respect to the bogie body 41 when the actuator 61 extends to the maximum length is 45°. The inclination angle is the angle formed between a virtual plane (first plane) based on the upper surface or the lower surface of the outer contour portion (rectangular shape) of the bogie body 41 when viewed from the left-right direction and a virtual plane (second plane) based on the upper surface or the lower surface of the lower frame of the loading platform 43 (or the angle formed between the normal vector of the first plane and the normal vector of the second plane).

[0047] Note that by controlling the hydraulic drive unit 60, the actuator 61 can also be stopped at an arbitrary length. That is, the loading platform 43 can also be stopped at an arbitrary inclination angle.

[0048] On the other hand, when the actuator 61 contracts, the rear end portion of the loading platform 43 is displaced in a direction approaching the bogie body 41. In the present embodiment, the inclination angle (minimum inclination angle) of the loading platform 43 with respect to the bogie body 41 when the actuator 61 contracts to the minimum length is approximately 0° (substantially parallel). At this time, the actuator 61 is accommodated between the bogie body 41 and the loading platform 43 along the side surface on the rear side of the recess 41a. That is, the recess 41a also functions as an actuator housing portion for housing the actuator 61.

[0049] Further, when the actuator 61 contracts to the minimum length (when the inclination angle is the minimum inclination angle), the lower surface of the rear end portion of the loading platform 43 is in contact with the upper surface of the rear end portion of the bogie body 41. Note that the posture of the loading platform 43 during the running of the tractor 3 and the track carrier bogie 4 is the minimum inclination angle from the viewpoint of safety.

[0050] As shown in FIGS. 3 and 4, the rail conveyance carriage 4 is provided with an operation unit 7 for operating the generator 5 or the lift mechanism 6 (hydraulic drive unit 60). The operation unit 7 is provided at the front end of the rail conveyance carriage 4 (the front end of the carriage body 41 or the front end of the loading platform 43). In the present embodiment, the operation unit 7 is provided at the front end of the carriage body 41. Specifically, the operation unit 7 is provided at the front end of the left side surface of the carriage body 41. Note that the operation unit 7 may be provided at the front end of the right side surface of the carriage body 41 or on the front surface of the carriage body 41. In any case, it is preferable that the operation unit 7 is provided in the vicinity of the loading platform shaft support portion 44 in the front-rear direction of the carriage body 41. The vicinity of the loading platform shaft support portion 44 can be the side of the loading platform shaft support portion 44 rather than the center in the front-rear direction of the carriage body 41, preferably within 1 / 4 of the side of the loading platform shaft support portion 44 in the front-rear direction of the carriage body 41, more preferably within 1 / 8 of the side of the loading platform shaft support portion 44 in the front-rear direction of the carriage body 41, and it is preferable that a part of the operation unit 7 is located at the position of the loading platform shaft support portion 44 in the front-rear direction of the carriage body 41.

[0051] The operation unit 7 has a lift mechanism operation unit for operating the lift mechanism 6 (hydraulic drive unit 60) and a generator operation unit for operating the generator 5. Each of the lift mechanism operation unit and the generator operation unit is composed of an operation button, an operation lever, and the like.

[0052] Specifically, the lift mechanism operation unit has an operation button electrically connected to the lift mechanism 6 (hydraulic drive unit 60), and transmits an operation signal corresponding to the operation input to the lift mechanism 6 (hydraulic drive unit 60). For example, the lift mechanism operation unit can transmit an operation signal for lifting up the loading platform 43, a signal for lowering the loading platform 43, an operation signal for stopping the loading platform 43 at an arbitrary inclination angle, etc. according to the operation input.

[0053] The generator operation unit has an operation lever for manually and mechanically remotely operating the choke lever of the intake air amount adjustment unit 51 and a start / stop unit for starting / stopping the generator 5. Between the generator operation unit and the generator 5 (intake air amount adjustment unit 51), a choke wire 71 that mechanically connects the operation lever and the choke lever is provided. The choke wire 71 is configured such that the operation lever and the choke lever are interlocked. Thereby, in the operation unit 7, the choke lever of the intake air amount adjustment unit 51 can be remotely operated.

[0054] Here, as shown in FIG. 5, the length of the choke wire 71 is set with a predetermined margin length. The margin length of the choke wire 71 is the length of the portion that exceeds the length normally required to mechanically connect the operation lever and the choke lever (the length at which the operation lever and the choke lever can be interlocked in a static state).

[0055] The margin length of the choke wire 71 can be set to be at least 1 / 5 of the separation distance L1 between the axis of the generator shaft support portion 45 and the connection portion of the choke wire 71 and the intake air amount adjustment unit 51. Also, the margin length of the choke wire 71 is preferably at least 1 / 4 of the separation distance L1, more preferably at least 1 / 3 of the separation distance L1, and suitably at least 1 / 2 of the separation distance L1. In this way, even when the generator 5 rotates relative to the cart body 41, the choke wire 71 can follow the movement of the generator 5, and disconnection or malfunction of the choke wire 71 can be prevented.

[0056] On the other hand, if the slack length of the choke wire 71 is made too long, there are problems from the perspective of safety, such as getting caught on other members like the loading platform 43 or hitting people during work. Therefore, the slack length of the choke wire 71 is preferably within 3 times the separation distance L1, more preferably within 2.5 times the separation distance L1, and suitably within 2 times the separation distance L1. Also, the slack length of the choke wire 71 can be within 1 / 10 of the total length of the choke wire 71, preferably within 1 / 12 of the total length of the choke wire 71, and suitably within 1 / 15 of the total length of the choke wire 71.

[0057] In the track carrier cart 4 of this embodiment, an operation unit 7 for operating the generator 5 or the lift mechanism 6 (hydraulic drive unit 60) is provided at the front end of the cart body 41. Since the loading platform 43 is pivotally supported by the loading platform shaft support portion 44 so as to be rotatable with respect to the cart body 41 at the front end portion, when displacing the loading platform 43, the rear end portion moves greatly. However, since the operation unit 7 is located at the front end portion far from the rear end portion, the operation unit 7 can be safely operated to displace the loading platform 43.

[0058] Also, in the track carrier cart 4 of this embodiment, since the operation unit 7 is arranged in front of the recess 41a that houses the hydraulic drive unit 60, the operation unit 7 can be safely operated to displace the loading platform 43. Further, the operation unit 7 is provided with both a lift mechanism operation unit for operating the lift mechanism 6 (hydraulic drive unit 60) and a generator operation unit for operating the generator 5, and since both of these are provided on the front side (loading platform shaft support portion 44 side) of the cart body 41, safe operation can be performed in any operation during lift operation or power generation operation.

[0059] Furthermore, in the track carrier cart 4 of this embodiment, since the operation unit 7 is arranged in front of the recess 41a that houses the actuator 61, the operation unit 7 can be safely operated to displace the loading platform 43.

[0060] The rail-mounted trolley in this invention corresponds to the rail-mounted trolley 4. Similarly hereinafter, the rail corresponds to the rail 2, the wheels correspond to the wheels 42, the trolley body corresponds to the trolley body 41, the loading platform corresponds to the loading platform 43, the loading-platform shaft support corresponds to the loading-platform shaft support 44, the actuator corresponds to the actuator 61, the hydraulic drive unit corresponds to the hydraulic drive unit 60, the operation unit corresponds to the operation unit 7, the hydraulic-drive-unit storage part corresponds to the recess 41a, the front wheels correspond to the front wheels 42a, the rear wheels correspond to the rear wheels 42b, the actuator storage part corresponds to the recess 41a, the generator shaft support corresponds to the generator shaft support 45, and the choke wire corresponds to the choke wire 71. However, this invention is not limited to this embodiment and can be other various embodiments. Also, the screens and specific configurations etc. cited in the above embodiment are examples, and can be appropriately changed according to the actual product.

[0061] For example, in the above embodiment, the case where the operation unit 7 is provided at the front end of the trolley body 41 was taken as an example for explanation. However, the operation unit 7 may be provided at the front end of the loading platform 43. Even in this case, the same effects as those of the above embodiment can be obtained.

[0062] Moreover, the present invention can also be provided as a rail transportation device including the above-described rail-mounted trolley 4 and a towing vehicle 3 that travels on the rail 2 and tow the rail-mounted trolley 4. Further, the present invention can also be provided as a rail transportation system 1 having the above rail transportation device and the rail unit 2U.

[0063] Furthermore, as shown in FIG. 6, a vibration suppression unit 5b for suppressing vibration and excessive displacement of the generator frame 5a that holds the generator 5 may be provided. As the vibration suppression unit 5b, a gas-type or oil-type cylinder damper, or a spring damper that absorbs shock by elastic deformation of an elastic body such as a spring can be used. When the vibration suppression unit 5b is provided, it is possible to reduce the vibration at the start of the generator 5 and the shock (sudden movement) at the start and stop of the track carrier bogie 4, and prevent a sudden large force from being applied to the choke wire 71. Therefore, it is possible to improve the durability of the choke wire 71 and prevent breakage.

[0064] Also, as shown in FIG. 7, when the operation unit 7 is provided on the front surface of the bogie body 41, the choke wire 71 may be wired so as to pass through the center in the width direction of the bogie body 41. In this case, the choke wire 71 can be fixed to the bogie body 41 at appropriate positions (for example, three positions), and wired so that the choke wire 71 has a curved portion (for example, a curved portion forming an S shape) in a plan view. In this way, it is possible to absorb the extra length at the curved portion of the choke wire 71, and also absorb the product variation in the length of the choke wire 71.

Industrial Applicability

[0065] The present invention can be used in various industries such as the transportation industry on sloping land in mountain forests, etc., and the transportation industry of materials and people during the construction of iron towers, bridges, roads, etc. in mountain forests, where tracks are laid in places without roads or where it is difficult to install roads, and objects are transported by track carriers.

Explanation of Reference Numerals

[0066] 1... Track transportation system 2... Track 2U... Track unit 3... Tractor (track carrier) 4... Track carrier bogie 41... Bogie body 42... Wheels 43... Loading platform 44… Loading platform shaft support 5… Generator 60… Hydraulic drive unit 61… Actuator 7… Operating unit

Claims

1. A rail-mounted carrier for traveling on rails, comprising: a carrier body; wheels provided on the lower surface of the carrier body for rolling on the rails; a load platform displaceably provided on the carrier body; a load platform shaft support portion pivotally supporting the load platform relative to the carrier body at the front end portion of the carrier body and the front end portion of the load platform; an actuator interposed between the carrier body and the load platform, having one end connected to the carrier body and the other end connected to the load platform, and being driven to expand and contract hydraulically; a hydraulic drive unit for driving the actuator to expand and contract; a generator disposed at the rear end portion of the carrier body for supplying power to the hydraulic drive unit; an operation unit for operating the generator; wherein the operation unit is disposed at the front end portion of the carrier body or the front end portion of the load platform. Rail-mounted carrier.

2. The rail-mounted carrier according to claim 1, further comprising a hydraulic drive unit housing portion provided on the carrier body for housing the hydraulic drive unit, wherein the wheels include front wheels provided on the lower surface at the front side of the carrier body for rolling on the rails and rear wheels provided on the lower surface at the rear side of the carrier body for rolling on the rails, the hydraulic drive unit housing portion is disposed between the front wheels and the rear wheels in the front-rear direction, and the operation unit is disposed forward of the hydraulic drive unit housing portion. Rail-mounted carrier according to claim 1.

3. The rail-mounted carrier according to claim 2, further comprising an actuator housing portion provided on the carrier body for housing the actuator in a contracted state, wherein the operation unit is disposed forward of the actuator housing portion. Rail-mounted carrier according to claim 2.

4. wherein the generator is a gasoline-powered generator, the gasoline-powered generator is pivotally supported on the carrier body by a generator shaft support portion, a choke wire is provided between the operation unit and the gasoline-powered generator for adjusting the intake air amount of the gasoline-powered generator, the gasoline-powered generator is configured to be maintained in a horizontal state or a state close thereto by its own weight, and the length of the choke wire is set with a margin of at least 1 / 3 of the distance between the axis of the generator shaft support portion and the connection portion of the choke wire and the gasoline-powered generator. Rail-mounted carrier according to claim 1, 2 or 3.

5. A rail-mounted transport device comprising the rail-mounted carrier according to claim 1, and a tractor traveling on the rails and towing the rail-mounted carrier. Rail-mounted transport device.

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