JP7628249B2 - Cart equipped with rail feed device - Google Patents

Description

The present invention relates in particular to a bogie equipped with a rail feed device that enables curved running.

For example, in tunnel construction, various types of carts, such as sheet-covered carts, center carts, and scaffolding carts, are used depending on the work process. As shown in Patent Documents 1 and 2 below, these carts often run on a pair of rails laid on the ground, with the wheels of the cart running on the rails. In this case, the rails are divided into multiple sections along the longitudinal direction, and as the cart runs, the rails that have finished running are moved forward in the direction of travel in sequence while the cart runs.

However, with this method, for example, the rails are dragged and moved with heavy machinery such as a backhoe, and the rail position is fine-tuned with the bucket of the heavy machinery, etc. This increases the risk of accidents such as contact or being pinched in the work due to the combined work of reversing and operating the backhoe, and there are problems such as time constraints when removing the debris, backfilling the invert, and transporting materials and equipment, and rail feeding work is delayed because the rails cannot be replaced. There are also problems such as the need for multiple workers, including watchmen.

In recent years, therefore, carriages equipped with rail feed devices have been proposed and put to practical use. This rail feed device will be described in detail with reference to Figures 17 to 20.

As shown in FIG. 17, wheels 60 are rotatably mounted on the lower ends of a pair of front columns 50A, 50B and a pair of rear columns 50C, 50D of the cart 50, and outriggers 51 are provided on the sides.

As shown in FIG. 19, vertical alignment members 62, 62 are provided on both sides of the wheel 60, and feed rollers 63 that fit into the side recesses of the rail 61 are provided at the lower ends of these vertical alignment members 62, 62, so that when the outrigger 51 is extended to raise the carriage 50, the rail 61 is lifted up away from the ground. The rail 61 is composed of a rail body 61A on which the wheel 60 runs, and a feed rail 61B made of H-shaped steel that is integrally connected to the lower side of the rail body 61A, and the feed rail 61B forms a side recess into which the feed rollers 63 fit.

As shown in Figure 18, the rail feed mechanism includes a roller chain 64 stretched between the front and rear ends of the rail 61, a drive sprocket 66 that meshes with the roller chain 64, and a motor that drives the drive sprocket 66. Therefore, once the cart 50 is pulled up by the outriggers 51, the roller chain 64 is driven to send the rail 61 forward in the direction of travel, and as shown in Figure 20, the outriggers 51 are retracted to place the rail 61 on the ground. After that, the wheels 60 run on the rail 61, and the cart 50 moves forward.

The rail feed mechanism solves the problems that arise when heavy machinery is used to move the rails forward in the direction of travel, but the previous rail feed mechanism could only feed the rails in a straight line, meaning it could not be used when the tunnel was curved.

Therefore, in the following Patent Document 3, the applicants proposed a bogie equipped with a pair of wheels on the right and left sides of the bogie, a pair of wheels on the front and rear, outriggers for raising and lowering the bogie, and a rail feed device that suspends the rail so that it can move forward and backward when the bogie is raised by the outriggers and can feed the rail forward and backward in the direction of travel, in which the bogie is equipped with a bogie lifting and rotating device at four locations on the front, rear, left and right, and the bogie lifting and rotating device is equipped with a rail feed device consisting of a rotating base supported rotatably around a vertical axis on the bogie, a lateral slide frame that is relatively movable along the horizontal direction with respect to the rotating base, outriggers provided on both ends of the lateral slide frame, and a lateral movement control jack connected between the rotating base and the lateral slide frame.

JP 2000-291392 A JP 2003-35098 A JP 2021-46768 A

The proposed rail feed mechanism in Patent Document 3 enables the carriage to travel on curved tracks, but this invention is a mechanism for yaw rotating the carriage as a whole while it is raised by the outriggers, which creates problems such as a large-scale device structure, heavy overall weight, and high manufacturing costs. There are also other problems such as complicated operating procedures.

The main objective of the present invention is to provide a bogie equipped with a rail feed device that allows curved running, has the advantages of a simple rail feed mechanism structure, relatively low manufacturing costs, and simple operating procedures.

In order to solve the above problems, the present invention according to claim 1 provides a bogie equipped with a pair of wheel devices for running on rails on the right and left sides of the bogie, and outriggers for raising and lowering the bogie in positions adjacent to the wheel devices, and a rail feed device that can feed the rail in the traveling direction when the bogie is raised by the outriggers,
A winch is provided at the rear of the right and left sides of the carriage, and the winch and the rear end of the rail are directly or indirectly connected by a wire, so that the rail can be sent out in the forward direction while sliding on the ground surface by winding up the winch,
Of the pair of front and rear wheel devices, the rear wheel device has a wheel holder that is held so as to be freely swingable relative to the dolly via a horizontal shaft, a front wheel is provided on the front side of this wheel holder straddling the horizontal shaft, and a rear wheel is provided on the rear side, and when the dolly is raised by an outrigger, the wheel holder automatically swings due to the difference in weight between the front and rear wheels, so that one of the front and rear wheels comes into contact with the rail, and the width of the wheel on the side that comes into contact with the rail is set to a normal width relative to the rail,
Of the pair of front and rear wheel devices, the front wheel device has a wheel width wider than the rail,
There is provided a trolley equipped with a rail feeding device, characterized in that a rail lateral movement device is provided on the front side of the trolley, which moves the rail laterally in a direction perpendicular to the traveling direction when the trolley is raised by the outriggers.

In the invention described in claim 1 above, first, the rail pay-out mechanism is a mechanism in which a winch is disposed on each of the right and left rear parts of the carriage, and the winch and the rear end of the rail are directly or indirectly connected by a wire, and the rail can be paid out forward while sliding on the ground surface by winding up the winch. The conventional rail pay-out mechanism described above is a so-called gliding type, in which the rail is lifted in the air and paid out, but in the case of the present invention, the rail is left on the ground surface and paid out while sliding on the ground surface by the winch and wire system, so it is a so-called sliding type rail pay-out mechanism.

Of the pair of front and rear wheel devices, the rear wheel device is equipped with a wheel holder that is held so as to be freely swingable relative to the trolley via a horizontal axis, and a front wheel is provided on the front side of this wheel holder straddling the horizontal axis, and a rear wheel is provided on the rear side, and when the trolley is raised by the outriggers, the wheel holder automatically swings due to the difference in weight between the front and rear wheels, so that one of the front and rear wheels comes into contact with the rail, and the width of the wheel on the side that comes into contact with the rail is normal relative to the rail, while of the pair of front and rear wheel devices, the wheel of the front wheel device is made wider relative to the rail, and a rail lateral movement device is provided on the front side of the trolley for moving the rail laterally in a direction perpendicular to the direction of travel when the trolley is raised by the outriggers.

Therefore, when the dolly is raised by the outriggers, the front wheels are constantly kept in contact with the rail, and when the rail is moved laterally by the rail lateral movement device, the wheel on the side in contact with the rail holds the rail firmly, with the holding position acting as a fulcrum, making it possible to move the rail so that it rotates around the wheel position on the side in contact with the rail in a plan view. Of the pair of front and rear wheel devices, the front wheel device has a wider wheel width than the rail in order to prevent the wheels from coming off the rail when the dolly is lowered after moving the rail. In other words, by making the wheel width wide enough to allow for rail movement, when the dolly is lowered after moving the rail, the wheels will not come off and will be placed on the rail.

In the case of this rail feed mechanism, the cart is raised by the outriggers, and instead of rotating the cart itself in a yaw direction as in the conventional method, the cart is fixed and only the rail rotates, which has the advantages of a simple structure for the rail feed mechanism, relatively low manufacturing costs, and simple operating procedures.

The present invention according to claim 2 provides a carriage equipped with the rail feed device according to claim 1, in which the wheel holder in the rear wheel device is provided with a drive motor, and the drive motor is used as a driving force to drive the wheels to run the carriage, and also serves as a weight to swing the wheel holder when the drive motor raises the carriage by the outriggers.

The invention described in claim 2 above is a device in which a drive motor that provides the driving force for the vehicle is mounted on the rear wheel device, and this drive motor is used as a weight to cause the wheel holder to swing in a specified direction.

The present invention relates to claim 3, and provides a bogie equipped with the rail feed device according to claim 1 or 2, in which the wheel on the rear wheel device that does not contact the rail is made wider.

The invention described in claim 3 above is such that the width of the wheel on the side not in contact with the rail is made wider in the rear wheel device. Note that since the wheel on the side not in contact with the rail is positioned adjacent to the wheel on the side in contact with the rail, if the amount of lateral movement of the rail is on the order of a few mm and falls within the margin of the normal wheel width, the normal wheel width can be used.

The present invention relates to claim 4, and there is provided a bogie equipped with a rail feed device as described in any one of claims 1 to 3, wherein the front wheel device of the wheel devices is provided with a wheel holder that is held so as to be freely swingable relative to the bogie via a horizontal axis, and a front wheel is provided on the front side of this wheel holder straddling the horizontal axis and a rear wheel is provided on the rear side, and when the bogie is raised by outriggers, the wheel holder automatically swings due to the difference in weight between the front and rear, and one of the front and rear wheels is brought into contact with the rail.

The invention described in claim 4 specifies the structure of the front wheel device, which is structured like the rear wheel device. Specifically, the wheel holder is provided so as to be able to swing freely on the cart via a horizontal shaft, and the wheel holder is provided with a front wheel on the front side straddling the horizontal shaft and a rear wheel on the rear side, and when the cart is raised by the outriggers, the wheel holder automatically swings due to the difference in weight between the front and rear wheels, so that one of the front and rear wheels comes into contact with the rail.

The present invention according to claim 5 provides a cart equipped with a rail feed device according to any one of claims 1 to 4, in which the rail lateral movement device is provided with a rail engagement device that can be freely engaged and disengaged with the rail, a reciprocating double-rod hydraulic jack is arranged in a horizontal orientation with the piston rod immovable, and the rail engagement device is connected to the cylinder of the reciprocating double-rod hydraulic jack.

The invention described in claim 5 above specifies the structure of the rail lateral movement device. Specifically, the rail lateral movement device is configured to horizontally align a reciprocating double-rod hydraulic jack and use it to move the rail engagement device laterally.

The present invention according to claim 6 provides a carriage equipped with a rail feed device according to any one of claims 1 to 4, in which the rail lateral movement device is provided with a rail engaging device that can be freely engaged and disengaged with the rail, the ball screw is arranged in a horizontal orientation, and the rail engaging device is connected to a slider of the ball screw.

The invention described in claim 6 above specifies the structure of the rail lateral movement device. Specifically, the rail lateral movement device has a ball screw arranged in a horizontal orientation, which is used to move the rail engagement device laterally.

As explained above in detail, the present invention makes it possible to provide a bogie equipped with a rail feed device that has the advantages of enabling curved running, a simple rail feed mechanism structure, relatively low manufacturing costs, and simple operating procedures.

1 is a cross-sectional view of a bogie 1 equipped with a rail feed device according to the present invention. This is a side view. 3 is a cross-sectional view of the rear outrigger 2 of the bogie 1 (view taken along line III-III in FIG. 2). 4 is a cross-sectional view of the rear outrigger 2 of the bogie 1 (view taken along line IV-IV in FIG. 2). FIG. 2 is an enlarged view of a main portion showing the rail feed device. 6 is a side view showing the rear wheel device 3 (part VI in FIG. 2 ). FIG. 1A is a cross-sectional view of a front wheel 18 (normal wheel), and FIG. 1B is a cross-sectional view of a rear wheel 19 (wide wheel). 8 is a side view showing the front wheel device 4 (VIII-VIII portion of FIG. 2). FIG. FIG. 2 is a front view of the rail lateral movement device 5. FIG. 11 is a front view showing another example of the rail lateral movement device 5. 13 is a side view showing another example of the wheel device 4. FIG. FIG. 1 is a side view (part 1) showing how the bogie 1 runs on a curve. FIG. 11 is a schematic diagram showing the relationship between the wheels and the rails at that time. FIG. 2 is a side view (part 2) showing how the bogie 1 runs on a curve. FIG. 11 is a schematic diagram showing the relationship between the wheels and the rails at that time. FIG. 3 is a side view (part 3) showing how the bogie 1 runs on a curve. 1 is a cross-sectional view of a bogie 1 showing a conventional rail feed device 50. FIG. This is a side view. This is a front view of the outrigger part (with the cart raised). FIG. 13 is a front view of the outrigger portion (with the bogie lowered).

The following describes in detail the embodiments of the present invention with reference to the drawings.

[Regarding the bogie 1 and rail feed device]
First, the structures of the bogie 1 and the rail feed device will be described in detail with reference to Figs.

For example, in the case of tunnel construction, various types of carts 1 can be used, such as a sheeting cart for laying waterproof sheets on the wall surface after excavation, a scaffolding cart for assembling rebar, and a center cart for pouring lining concrete. The illustrated example shows an example of a center cart.

As shown in FIG. 2, a pair of wheel devices 3 and 4 for running on the rail 11 are provided on the right and left sides of the bogie 1, that is, on the lower ends or in the vicinity of the pair of left and right front columns 1A, 1B and the pair of left and right rear columns 1C, 1D of the bogie 1. The wheel device 3 refers to the rear wheel device, and the wheel device 4 refers to the front wheel device. As shown in FIG. 3 in detail, the rail 11 is composed of a rail body 12 and a U-shaped cross-section member (channel steel) 13 that is joined integrally with the rail body 12 and opens upward. The U-shaped cross-section member 13 functions as a sled for sliding on the ground surface, and its front end is bent upward. The rail body 12 is joined integrally to the center of the inner surface of the U-shaped cross-section member 13 by welding or the like.

As shown in Fig. 3, an outrigger 2 equipped with a pair of left and right jacks 6A, 6B is provided at the wheel device 3 provided at the lower end of the rear columns 1C, 1D, straddling the rear columns 1C, 1D in the horizontal direction. That is, the outrigger 2 is constituted by legs 5A, 5B that protrude laterally from both sides of the rear columns 1C, 1D and extend downward, and the jacks 6A, 6B are provided at the lower ends of the legs.

On the other hand, in the front pillars 1A, 1B, as shown in FIG. 4, an outrigger 2 equipped with a pair of left and right jacks 6A, 6B is provided at the wheel device 4 provided at the lower end of the pillars 1A, 1B, straddling the front pillars 1A, 1B in the horizontal direction. That is, the outrigger 2 is constituted by legs 5A, 5B that protrude laterally from both sides of the front pillars 1A, 1B and extend downward, and the jacks 6A, 6B are provided at the lower ends of the legs. Note that the outrigger 2 can also be a one-leg type outrigger instead of the two-leg type structure described above.

The four outriggers 2, 2... are preferably positioned at the intersection of a rectangle in plan view to balance each other. By simultaneously contracting the jacks 6A..., 6B... of the four outriggers 2, 2..., the wheels of the wheel devices 3, 4 are placed on the rails 11, and by simultaneously extending the jacks 6A..., 6B... of the four outriggers 2, 2..., the cart 1 can be raised upward.

As shown in detail in FIG. 5, the rail feed mechanism has winches 7 disposed at the rear of the right and left sides of the carriage 1, and these winches 7 are directly or indirectly connected to the rear end 11a of the rail 11 by a wire 8, so that the rail 11 can be sent forward while sliding along the ground surface by winding up the winch 7. In the illustrated example, the winch 7 is disposed on the back side of the rear support 1C (1D) which is the rear part of the carriage 1, but it may be disposed in another location. An electric winch can be suitably used as the winch 7.

Here, "directly connected by wire 8" means that the winch 7 and the rear end 11a of the rail 11 are directly connected without an intermediate pulley or the like, and "indirectly connected by wire 8" means that a pulley is used in between to reduce the winch hoisting force. The illustrated example shows a configuration in which the winch 7 and the rear end 11a of the rail 11 are indirectly connected via pulleys 12 and 13.

After the cart 1 has traveled on the rail 11 and has reached a position almost at the front end of the rail, in order to send the rail 11 forward in the direction of travel, the cart 1 is raised by the outriggers 2, 2, etc., and the winch 7 is operated to wind up the wire 8, thereby sending the rail 11 forward in the direction of travel.

This rail feeding mechanism allows the rail 11 to be sent out in a forward direction by sliding along the ground surface using the force of a winch while it is still on the ground surface, without lifting it into the air. With a rail sending out mechanism using a conventional roller chain and sprocket mechanism, scattering concrete could become entangled in the roller chain or sprocket during centering, which involves pouring concrete, and cause breakdowns. However, with a rail sending out mechanism using a winch and wire mechanism like the one in this invention, even if work involving handling concrete is involved, this is unlikely to cause breakdowns, making it possible to carry out work stably.

[About curved driving]
In the present invention, in order to accommodate curved running while using the rail feed device, the wheel devices 3, 4 are devised, and a rail lateral movement device 5 is provided which moves the rail 11 laterally in a direction perpendicular to the traveling direction when the bogie 1 is raised by the outriggers 2, 2 ....

(Regarding the wheel device 3)
As shown in Fig. 6, the wheel device 3, i.e., the rear wheel device 3 of the wheel devices 3, 4, includes a wheel holder 17 held to be swingable via a horizontal shaft 14 relative to the carriage 1, and includes a front wheel 18 on the front side of the wheel holder 17 straddling the horizontal shaft 14 and a rear wheel 19 on the rear side, and when the carriage 1 is raised by the outriggers 2, 2..., the wheel holder 17 automatically swings due to the difference in weight between the front and rear wheels, so that one of the front wheel 18 and the rear wheel 19 comes into contact with the rail 11, and the width of the wheel 18 (19) on the side that comes into contact with the rail 11 is set to the normal width relative to the rail 11. Each structure will be described in detail below.

The lower ends of the rear supports 1C and 1D are equipped with connecting brackets 15 consisting of a pair of left and right hanging pieces that protrude downward, while the wheel holder 17 is equipped with connecting brackets 16 consisting of a pair of left and right upward extending pieces that protrude upward from its upper surface. As shown in Figures 3 and 7, the connecting brackets 15 and 16 are connected by a horizontal shaft 14, so that the wheel holder 17 is held in a freely swingable manner.

The wheel holder 17 has a frame-like bogie structure in which a pair of left and right side frames 17A, 17B are connected at predetermined locations by horizontal connecting members (not shown), and is provided with a front wheel 18 on the front side across the horizontal shaft 14 and a rear wheel 19 on the rear side. A drive motor 20 is mounted on the front upper surface of the wheel holder 17, and a sprocket 21 is arranged adjacent to it. A bevel gear provided on the shaft of the drive motor 20 meshes with a gear formed on the circumferential surface of the sprocket 21, and the sprocket 21 and the front wheel 18 are connected via a belt or chain 22. Therefore, when the wheel device 3 is placed on the rail 11, the front wheel 18 is rotated by driving the drive motor 20, causing the bogie 1 to run.

The drive motor 20 also serves as a weight that swings the wheel holder 17 when the cart 1 is raised by the outriggers 2, 2.... In other words, the wheel holder 17 is held in a swingable manner, and when the cart 1 is raised by the outriggers 2, 2..., the wheel holder 17 automatically swings clockwise as shown in the figure due to the difference in weight between the front and rear caused by the drive motor 20 (weight), and the front wheels 18 are maintained in contact with the rail 11.

The wheel width of the front wheels 18 is normal relative to the rail 11 (rail body 12) as shown in FIG. 7(A). On the other hand, the wheel that does not contact the rail 11, i.e., the rear wheels 19, has a wider wheel width relative to the rail 11 (rail body 12) as shown in FIG. 7(B).

Therefore, when the cart 1 is raised by the outriggers 2, 2, the front wheels 18 are always kept in contact with the rail 11, so that when the rail 11 is moved laterally by the rail lateral movement device 5 described later, the position of the front wheels 18 functions as a fulcrum, and the rail 11 moves so as to rotate around the position of the front wheels 18 in a plan view. In other words, when the rail 11 is moved laterally by applying a lateral force to the front side of the cart 1, if there is not one fulcrum that holds the rail 11 firmly, the entire rail 11 will move laterally uncontrollably. Therefore, by making the width of the front wheels 18 normal, the rail 11 can be held so that it does not move laterally at the contact position. It is desirable to set the width of the front wheels 18 to a width that allows a margin of several mm to several tens of mm on each side with respect to the width of the top of the rail 11 (the width of the top of the rail body 12).

On the other hand, the width of the wheel (rear wheel 19) that does not contact the rail 11 is made wider than the rail 11 so that the wheel does not come off the rail 11 when the carriage 1 is lowered after the rail 11 is moved laterally by the rail lateral movement device 5. Since the rear wheel 19 is disposed adjacent to the front wheel 18 that serves as the fulcrum, the amount of lateral movement of the rail 11 is small, and it is not necessary to make it as wide as the wheels 27, 28 of the front wheel device 4 described later. However, in this embodiment, the wheel width is adjusted to match the wheels of the wheel device 4 in order to provide two types of wheel width. Note that if the amount of lateral movement of the rail 11 at the position of the rear wheel 19 is only a few mm and falls within the margin of the normal wheel width, the rear wheel 19 can also be made to have the normal wheel width.

When the carriage 1 is raised by the outriggers 2, 2, ..., the wheels that are constantly in contact with the rails 11 may be the rear wheels 19. In this case, the drive motor 20 is mounted on the rear side of the wheel holder 17, and the rear wheels 19 are normal width wheels and the front wheels 18 are wide wheels.

(Regarding the wheel device 4)
On the other hand, of the wheel devices 3, 4, the front wheel device 4, as shown in Figure 8, is equipped with a wheel holder 26 that is held so as to be freely swingable relative to the trolley 1 via a horizontal shaft 23, and this wheel holder 26 is equipped with a front wheel 27 on the front side straddling the horizontal shaft 23 and a rear wheel 28 on the rear side, and when the trolley 1 is raised by the outriggers 2, 2 ..., the wheel holder 26 automatically swings due to the difference in weight between the front and rear wheels, so that one of the front wheel 27 and the rear wheel 28 comes into contact with the rail 11, and the wheel width of both the front wheel 27 and the rear wheel 28 is made wide.

More specifically, the lower end of the rear support 1A (1B) is provided with a connecting bracket 24 consisting of a pair of left and right hanging pieces that protrude downward, while the wheel holder 26 is provided with a connecting bracket 25 consisting of a pair of left and right upward extending pieces that protrude upward from its upper surface. As shown in FIG. 4, the connecting bracket 24 and the connecting bracket 25 are connected by a horizontal shaft 23, so that the wheel holder 26 is held in a freely swingable manner.

The wheel holder 26 has a frame-like bogie structure in which a pair of left and right side frames 26A, 26B are connected at predetermined locations by horizontal connecting members (not shown), and is provided with a front wheel 27 on the front side across the horizontal shaft 23 and a rear wheel 28 on the rear side. A drive motor 29 is mounted on the rear upper surface of the wheel holder 26, and a sprocket 30 is arranged adjacent to it. A bevel gear provided on the shaft of the drive motor 29 meshes with a gear formed on the circumferential surface of the sprocket 30, and the sprocket 30 and the rear wheel 28 are connected via a belt or chain 31. Therefore, when the wheel device 4 is placed on the rail 11, the rear wheel 28 is rotated by driving the drive motor 29, causing the bogie 1 to run.

The drive motor 29 also serves as a weight that swings the wheel holder 26 when the cart 1 is raised by the outriggers 2, 2, etc. In other words, the wheel holder 26 is held in a swingable manner, and when the cart 1 is raised by the outriggers 2, 2, etc., the wheel holder 26 automatically swings counterclockwise as shown in the figure due to the difference in weight between the front and rear caused by the drive motor 29 (weight), and the rear wheels 28 are maintained in contact with the rail 11.

The width of the rear wheels 28 and the front wheels 27 is wider than the rail 11 (rail body 12). The amount (dimension) of the wider width is made wider so that the rail 11 can be moved laterally by the rail lateral movement device 5 with the carriage 1 raised by the outriggers 2, 2, etc. If R=1500m is to be accommodated and the wheelbase (distance between the wheel devices 3, 4) is 11m, the lateral movement amount (A) will be approximately 60mm, so the amount of the wider width is equal to or greater than the wheel width obtained by adding the lateral movement amount (A) x 2 (for both the left and right sides) to the normal width.

(Regarding the rail lateral movement device 5)
As shown in Figure 8, a rail lateral movement device 5 is provided on the front side of the trolley 1 for moving the rail 11 laterally in a direction perpendicular to the traveling direction when the trolley 1 is raised by the outriggers 2, 2 ....

As shown in FIG. 8, the rail lateral movement device 5 is provided with a frame 33 having an inverted L shape in side view, which is made up of a horizontal frame 33A and a vertical frame 33B, attached to the front support 1A (1B) via a horizontal shaft 32, a tilt control jack 34 is provided to connect the front support 1A (1B) to the corner of the inverted L-shaped frame 33, a rail engagement device 35 is provided at the lower end of the inverted L-shaped frame 33, and a lateral movement mechanism 36 is provided to laterally move the rail engagement device 35 in a direction perpendicular to the carriage travel direction.

By extending and retracting the tilt control jack 34, the inverted L-shaped frame 33 is tilted, and the rail engagement device 35 can be controlled to be freely engaged and disengaged with respect to the rail 11.

As shown in FIG. 9, the lateral movement mechanism 36 is structured such that a double-acting double-rod hydraulic jack 36 is arranged in a horizontal orientation with piston rods 36B and 36C immovable, and the rail engagement device 35 is connected to the cylinder 36A of the double-acting double-rod hydraulic jack 36, so that the cylinder 36A and the rail engagement device 35 operate as a unit. The "double-acting type" refers to a type in which an oil inlet and outlet are provided on both the head side and the cap side, and oil flows in and out alternately to perform a reciprocating motion, and the "double-rod type" refers to a type in which piston rods protrude from both ends of the cylinder, and the rods at both ends are integrated into a piston and behave as a unit.

The rail engagement device 35 is composed of an engagement device main body 35A having a wheel structure and a holder 35B that holds it rotatably, and the holder 35B is supported so as to be slidable laterally relative to the vertical frame 33B, and the cylinder connector 35C is engaged with the cylinder 36A. The engagement device main body 35A has a rail structure and is supported rotatably, so that when the rail 11 is sent forward in an engaged state, the engagement device main body 35A rotates as the rail 11 is sent out, making it possible to stably support the rail 11.

The piston rods 36B and 36C of the double-acting double-rod hydraulic jack 36 are arranged in a horizontal orientation in an immovable state, which causes the cylinder 36A to move, and in conjunction with this, the rail engagement device 35 can be moved laterally.

To move the rail 11 laterally, as shown in FIG. 8, the cart 1 is raised by the outriggers 2, 2, etc., and the inverted L-shaped frame 33 is swung downward by controlling the extension and contraction of the tilt control jack 34, engaging the rail engagement device 35 with the rail 11. Next, the cylinder 36A is moved by driving the double-acting double-rod hydraulic jack 36, which moves the rail engagement device 35 together with the cylinder 36A, moving the rail 11 laterally. In the case of this wheel device 4, the rear wheels 28 are always in contact with the rail 11, so the rail 11 moves laterally while sliding on the underside of the rear wheels 28.

[Other examples]
(1) In the above embodiment, a double-acting double-rod hydraulic jack 36 is used as the lateral movement mechanism 36, but a ball screw mechanism 37 may be used as shown in Fig. 10. As shown in Fig. 10, a ball screw 37A is arranged in a horizontal orientation, and the rail engagement device 35 is connected to a slider 37B of the ball screw 37A, so that the rail engagement device 35 moves together with the slider 37B by rotating the ball screw 37 by a hydraulic motor or manually.

(2) In the above embodiment, the wheel device 4 has the wheel holder 26 held so as to be able to swing freely via the horizontal shaft 23. However, as shown in FIG. 11, the wheel device 4 may have a structure that does not have a drive mechanism using the drive motor 29 (the vehicle runs using only the wheel device 3 as the driving source), or may have a fixed wheel 40 that does not swing. Even in this case, the wheel width must be wide.

[Regarding curve running procedure for bogie 1]
Next, the manner in which the bogie 1 travels around a curve will be described in detail with reference to Figs.

Figure 12 shows the state in which the cart 1 is working while traveling on the rail 11. In this state, both wheel devices 3 and 4 are mounted on the rail, and the cart moves forward by driving the drive motor 20 of the wheel device 3 and the drive motor 29 of the wheel device 4. The winch 7 pays out the wire 8 in accordance with the travel of the cart 1. In addition, the rail lateral movement device 5 is in a state in which the rail engagement device 35 is detached from the rail by retracting the tilt control jack 34.

Figure 13 shows a schematic diagram of the relationship between the wheels 18 and 19 of the wheel unit 3, the wheels 27 and 28 of the wheel unit 4, and the rail 11 when the bogie 1 is running.

When the carriage 1 has moved to the front end of the rail 11, the rail 11 is repositioned and moved laterally to accommodate curved running.

As shown in FIG. 14, the entire cart 1 is raised by extending the jacks 6A, 6B of the four outriggers 2, 2.... In this case, when the cart 1 is raised, the wheel holder 17 of the wheel device 3 automatically swings clockwise due to the difference in weight between the front and rear, and the front wheels 18 maintain a state of contact with the rail 11. In addition, the wheel holder 26 of the wheel device 4 automatically swings counterclockwise due to the difference in weight between the front and rear, and the rear wheels 28 maintain a state of contact with the rail 11. In addition, the tilt control jack 34 of the rail lateral movement device 5 is lowered downward by extending it, and the rail engagement device 35 is brought into a state of engagement with the rail 11.

Once the preparatory work up to this point is completed, the rail 11 is moved laterally by driving the lateral movement mechanism 36 of the rail lateral movement device 5. Figure 15 is a schematic diagram showing the relationship between the wheels 18, 19 of the wheel device 3, the wheels 27, 28 of the wheel device 4, and the rail 11 during lateral rail movement. As shown in Figure 15, the front wheel 18 of the wheel device 3 firmly holds the rail 11, so the position of this front wheel 18 functions as a fulcrum P, and the rail 11 rotates horizontally with the position P of the front wheel 18 as the center of rotation.

Once the rail 11 has been rotated a predetermined amount, the wire 8 is wound up by the winch 7 so that the rail 11 is sent out in the direction of travel. This state is shown in FIG. 16. When the rail 11 is sent out, it is held by the front wheels 18 of the wheel device 3, the rear wheels 28 of the wheel device 4, and the engaging device main body 35A of the wheel structure of the rail engaging device 35 of the rail lateral movement device 5, so that it is sent out straight forward without any lateral wobble.

When the delivery of the rail 11 is complete, the jacks 6A, 6B of the outriggers 2, 2... are retracted to lower the entire carriage 1, placing the wheels 18, 19 of the wheel device 3 and the wheels 27, 28 of the wheel device 4 on the rail 11, and the rail lateral movement device 5 retracts the tilt control jack 34 to disengage the rail engagement device 35 from the rail 11. At this time, because the wheels 27, 28 of the wheel device 4 are both wide wheels, the wheels 27, 28 will not come off the rail 11.

The above steps allow the bogie 1 to move. By repeating these steps, the bogie 1 can move forward while traveling along a curve in the tunnel.

[Other examples]
(1) In the above embodiment, the present invention has been explained using various types of bogies used in the construction of mountain tunnels as examples, but the present invention is not limited to bogies for mountain tunnels and can be applied to bogies in general.

1...Cart, 2...Outrigger, 3...Wheel device (rear side), 4...Wheel device (front side), 5...Rail lateral movement device, 7...Winch, 8...Wire, 11...Rail, 12...Rail body, 13...C-shaped cross section member (channel steel), 14...Horizontal shaft, 17/26...Wheel holder, 18/27...Front wheel, 19/28...Rear wheel, 20/29...Driving motor, 21/30...Sprocket, 22/31...Belt or chain, 34...Tilt control jack, 33...Inverted L-shaped frame, 35...Rail engagement device, 36...Lateral movement mechanism, 37...Ball screw mechanism, 40...Fixed wheel

Claims (6)

A bogie equipped with a pair of wheel devices for running on rails on the right and left sides of the bogie, and outriggers for raising and lowering the bogie in positions adjacent to the wheel devices, and a rail feed device that can feed the rail in the traveling direction when the bogie is raised by the outriggers,
A winch is provided at the rear of the right and left sides of the carriage, and the winch and the rear end of the rail are directly or indirectly connected by a wire, so that the rail can be sent out in the forward direction while sliding on the ground surface by winding up the winch,
Of the pair of front and rear wheel devices, the rear wheel device has a wheel holder that is held so as to be freely swingable relative to the dolly via a horizontal shaft, a front wheel is provided on the front side of this wheel holder straddling the horizontal shaft, and a rear wheel is provided on the rear side, and when the dolly is raised by an outrigger, the wheel holder automatically swings due to the difference in weight between the front and rear wheels, so that one of the front and rear wheels comes into contact with the rail, and the width of the wheel on the side that comes into contact with the rail is set to a normal width relative to the rail,
Of the pair of front and rear wheel devices, the front wheel device has a wheel width wider than the rail,
A truck equipped with a rail feeding device, characterized in that a rail lateral movement device is provided on the front side of the truck for laterally moving the rail in a direction perpendicular to the traveling direction when the truck is raised by the outriggers. A cart with a rail feed device according to claim 1, in which the wheel holder in the rear wheel device is equipped with a drive motor, and the drive motor is used as a driving force to drive the wheels to run the cart, and also serves as a weight to swing the wheel holder when the drive motor raises the cart by the outriggers. A bogie equipped with a rail feed device according to claim 1 or 2, in which the wheel on the rear wheel device that does not contact the rail is wider. A bogie equipped with a rail feed device as described in any one of claims 1 to 3, wherein the front wheel device of the wheel devices is provided with a wheel holder that is held so as to be freely swingable relative to the bogie via a horizontal axis, and a front wheel is provided on the front side of this wheel holder straddling the horizontal axis and a rear wheel is provided on the rear side, and when the bogie is raised by outriggers, the wheel holder automatically swings due to the difference in weight between the front and rear wheels, and one of the front and rear wheels is brought into contact with the rail. The rail lateral movement device is a cart equipped with a rail feed device according to any one of claims 1 to 4, in which a rail engagement device is provided so as to be freely engaged and disengaged with respect to the rail, a reciprocating double-rod hydraulic jack is arranged in a horizontal orientation with the piston rod immovable, and the rail engagement device is connected to the cylinder of the reciprocating double-rod hydraulic jack. The rail lateral movement device is a cart equipped with a rail feed device according to any one of claims 1 to 4, in which a rail engagement device is provided so as to be freely engaged and disengaged with respect to the rail, a ball screw is arranged in a horizontal orientation, and the rail engagement device is connected to a slider of the ball screw.

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