Cart equipped with rail feed device

Abstract

To provide a truck equipped with a rail feeding device corresponding to curved traveling.SOLUTION: By hoisting a winch 7, a rail 11 can be hoisted forward while sliding. A wheel device 3 on a rear side includes a wheel holder 17 that is swingably held via a horizontal shaft 14 with respect to a truck 1. A front wheel 18 is provided on the front side of the wheel holder 17 across the horizontal shaft 14. A rear wheel 19 is provided on the rear side. When the truck 1 is lifted by outriggers 2, the wheel holders 17 automatically swing due to the difference in weight between the front and rear wheels. One of the front wheel 18 and the rear wheel 19 is brought into contact with the rail 11, and the width of the wheel 18 on the side contacting the rail 11 is set to the normal width with respect to the rail. On the other hand, the wheels 27 and 28 of the front wheel device 4 are wider than the rails. A rail laterally moving device 5 for laterally moving a rail 11 in a direction orthogonal to a traveling direction is provided on the front side of the truck 1 when the truck 1 is lifted by the outriggers 2.SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] The present invention particularly relates to a bogie equipped with a rail feed device that enables curved running. [Background technology]

[0002] 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 the following Patent Documents 1 and 2, a pair of rails is laid on the ground, and the wheels of the cart run on the rails. In this case, the rails are divided into multiple parts along the longitudinal direction, and as the cart runs, the rails that have run are moved forward in the direction of travel in sequence.

[0003] 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, which increases the risk of accidents such as contact and pinching due to the combined work of backing up and working with the backhoe, and there are problems such as time constraints on work when removing debris, backfilling the invert, and transporting materials and equipment, and rail feeding work is delayed because the rails cannot be replaced. There is also the problem of the need for multiple workers, including watchmen, etc.

[0004] In view of this, in recent years, a carriage equipped with a rail feed device has been proposed and put into practical use. This rail feed device will be described in detail with reference to Figs. 17 to 20.

[0005] As shown in FIG. 17, wheels 60 are rotatably mounted on the lower ends of a pair of left and right front pillars 50A, 50B and a pair of left and right rear pillars 50C, 50D of the cart 50, and outriggers 51 are provided on the sides thereof.

[0006] 19, vertical alignment members 62, 62 are provided on both sides of the wheel 60, and feed rollers 63 that fit into side recesses of the rail 61 are provided at the lower ends of these vertical alignment members 62, 62, so that when the outriggers 51 are extended to raise the carriage 50, the rail 61 is lifted up away from the ground. The rail 61 is composed of a rail main body 61A on which the wheels 60 run, and a feed rail 61B made of an H-shaped steel that is integrally connected to the lower side of the rail main body 61A, and the feed rail 61B forms a side recess into which the feed rollers 63 fit.

[0007] On the other hand, as shown in Fig. 18, the rail feeding mechanism includes a roller chain 64 stretched between the front and rear ends of the rail 61, a driving sprocket 66 meshing with the roller chain 64, and a motor driving the driving sprocket 66. Therefore, once the carriage 50 is pulled up by the outriggers 51, the roller chain 64 is driven to feed the rail 61 forward in the direction of travel, and the outriggers 51 are retracted to place the rail 61 on the ground, as shown in Fig. 20. Thereafter, the wheels 60 run on the rail 61, and the carriage 50 moves forward.

[0008] The rail feed mechanism has solved the problems that occurred when heavy machinery was 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, so there was a problem that it could not be used when the tunnel was curved.

[0009] Therefore, in Patent Document 3 listed below, the present applicants have proposed a bogie equipped with a rail feed device that is equipped with a pair of wheels on the front and rear of the right and left sides of the bogie, outriggers for raising and lowering the bogie, and with the bogie raised by the outriggers, suspends the rail so that it can move forward and backward, and can feed the rail forward and backward in the direction of travel, wherein 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 so as to be rotatable about a vertical axis relative to the bogie, a lateral slide frame arranged to be movable relatively 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. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] JP 2000-291392 A [Patent Document 2] JP 2003-35098 A [Patent Document 3] Patent Publication No. 2021-46768 Summary of the Invention [Problem to be solved by the invention]

[0011] The rail feed mechanism proposed in the above-mentioned Patent Document 3 has enabled the carriage to travel on curved tracks, but this invention has a mechanism for yaw-rotating the carriage as a whole while it is lifted by the outriggers, which causes problems such as a large-scale device structure, a heavy overall weight, and high manufacturing costs. There are also other problems such as a complicated operating procedure.

[0012] Therefore, the main object of the present invention is to provide a bogie equipped with a rail feeding device that enables curved running, has a simple structure for the rail feeding mechanism, is relatively inexpensive to manufacture, and has simple working procedures. [Means for solving the problem]

[0013] In order to solve the above problem, the present invention according to claim 1 provides a pair of front and rear suspensions on the right and left sides of the carriage. For running on rails A carriage equipped with a wheel device and outriggers for raising and lowering the carriage at positions adjacent to the wheel device, the carriage being equipped with a rail feed device capable of feeding the rail in the traveling direction when the carriage 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 is provided with a wheel holder that is held swingably via a horizontal shaft relative to the dolly, and a front wheel is provided on the front side of the wheel holder across the horizontal shaft, and a rear wheel is provided on the rear side. When the dolly is raised by the outriggers, the wheel holder is moved by the difference in weight between the front and rear. Da The vehicle automatically swings so that one of the front and rear wheels comes into contact with the rail, and the width of the wheel that comes into contact with the rail is set to a normal width with respect 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.

[0014] In the invention described in claim 1, first, the rail pay-out mechanism is a mechanism in which 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, 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 that pays out the rail while hoisted in the air, 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 to speak, a sliding type rail pay-out mechanism.

[0015] Of the pair of front and rear wheel devices, the rear wheel device is provided with a wheel holder that is held swingably via a horizontal shaft relative to the dolly, and a front wheel is provided on the front side of the wheel holder across the horizontal shaft, and a rear wheel is provided on the rear side of the wheel holder. When the dolly is raised by the outriggers, the wheel holder is moved by the difference in weight between the front and rear. Da The bogie automatically swings so that one of the front and rear wheels comes into contact with the rail, and the width of the wheel that comes into contact with the rail is made normal width relative to the rail, while of the pair of front and rear wheel devices, the wheel width of the front wheel device is made wider than the rail, and further a rail lateral movement device is provided at the front of the bogie for moving the rail laterally in a direction perpendicular to the traveling direction when the bogie is raised by the outriggers.

[0016] 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 wheels on the side in contact with the rail hold the rail firmly, and the holding position becomes the fulcrum, so that the rail can be moved so as to rotate 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 have a margin for the rail movement, the wheels can be placed on the rail without coming off when the dolly is lowered after moving the rail.

[0017] In the case of this rail feed-out mechanism, the cart is raised by the outriggers, and instead of rotating the cart itself in yaw as in the conventional method, the cart is fixed and only the rail rotates. This has the advantages of a simple structure for the rail feed mechanism, relatively low manufacturing costs, and simple operating procedures.

[0018] The present invention relates to claim 2, and there is provided a bogie equipped with the rail feed device described in claim 1, in which the wheel holder in the rear wheel device is equipped with a drive motor, and this drive motor is used as a driving force to drive the wheels to run the bogie, and also serves as a weight to cause the wheel holder to oscillate when the drive motor raises the bogie using the outriggers.

[0019] The invention described in claim 2 above has a drive motor that provides the driving force for the vehicle to be mounted on the rear wheel device, and at the same time, this drive motor is used as a weight to cause the wheel holder to oscillate in a predetermined direction.

[0020] According to a third aspect of the present invention, there is provided a bogie equipped with the rail feeding device according to any one of the first and second aspects, in which the wheel on the rear wheel device that does not contact the rail has a wide width.

[0021] 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 disposed adjacent to the wheel on the side in contact with the rail, if the lateral movement of the rail is about several mm and falls within the margin of the normal wheel width, the normal wheel width can be used.

[0022] As a fourth aspect of the present invention, the front wheel device of the wheel devices includes a wheel holder that is held to be able to swing freely via a horizontal shaft relative to the dolly, and the wheel holder includes a front wheel on the front side across the horizontal shaft and a rear wheel on the rear side, and when the dolly is raised by the outriggers, the wheel holder is moved by the difference in weight between the front and rear. Da There is provided a carriage equipped with the rail feed device according to any one of claims 1 to 3, which automatically swings and brings one of the front wheels and the rear wheels into contact with the rail.

[0023] The invention described in claim 4 above specifies the structure of the front wheel device, which is structured to imitate the rear wheel device. Specifically, a wheel holder is provided that is held swingably via a horizontal shaft relative to the dolly, and a front wheel is provided on the front side of the wheel holder across the horizontal shaft, and a rear wheel is provided on the rear side. When the dolly is raised by the outrigger, the wheel holder is moved by the difference in weight between the front and rear. Da It automatically swings so that one of the front and rear wheels comes into contact with the rail.

[0024] 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, wherein the rail lateral movement device is provided with a rail engaging device that can be freely engaged and disengaged with the rail, a reciprocating double-rod hydraulic jack is arranged in a horizontal orientation with its piston rod immovable, and the rail engaging device is connected to a cylinder of the reciprocating double-rod hydraulic jack.

[0025] The invention described in claim 5 above specifies the structure of the rail lateral movement device. Specifically, the rail lateral movement device has a double-acting double-rod hydraulic jack arranged in a horizontal orientation, and uses this to move the rail engaging device laterally.

[0026] 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, wherein the rail lateral movement device is provided with a rail engaging device that can be freely engaged and disengaged with the rail, a ball screw is arranged in a horizontal orientation, and the rail engaging device is connected to a slider of the ball screw.

[0027] The invention described in claim 6 specifies the structure of the rail lateral movement device. Specifically, the rail lateral movement device has a ball screw arranged in a horizontal orientation, and uses the ball screw to move the rail engaging device laterally. Effect of the Invention

[0028] As described above in detail, according to the present invention, it is possible to provide a bogie equipped with a rail feeding device which has the advantages of enabling curved running, a simple structure for the rail feeding mechanism, relatively low manufacturing costs, and simple working procedures. [Brief description of the drawings]

[0029] [Figure 1] 1 is a cross-sectional view of a carriage 1 equipped with a rail feed device according to the present invention. [Diagram 2] This is a side view. [Diagram 3]3 is a cross-sectional view of the rear outrigger 2 of the bogie 1 (a view taken along the line III-III in FIG. 2). [Figure 4] 4 is a cross-sectional view of the rear outrigger 2 of the bogie 1 (view taken along line IV-IV in FIG. 2). [Diagram 5] FIG. 2 is an enlarged view of a main portion showing the rail feed device. [Figure 6] 6 is a side view showing the rear wheel device 3 (part VI in FIG. 2). FIG. [Figure 7] 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). [Figure 8] 8 is a side view (VIII-VIII portion of FIG. 2) showing the front wheel device 4. FIG. [Figure 9] FIG. 2 is a front view of the rail lateral movement device 5. [Figure 10] 13 is a front view showing another example of the rail lateral movement device 5. FIG. [Figure 11] 13 is a side view showing another example of the wheel device 4. FIG. [Figure 12] FIG. 1 is a side view (part 1) showing how the bogie 1 runs on a curve. [Figure 13] FIG. 11 is a schematic diagram showing the relationship between the wheels and the rails at that time. [Figure 14] FIG. 2 is a side view (part 2) showing how the bogie 1 runs on a curve. [Figure 15] FIG. 11 is a schematic diagram showing the relationship between the wheels and the rails at that time. [Figure 16] FIG. 3 is a side view (part 3) showing how the bogie 1 runs on a curve. [Figure 17] FIG. 1 is a cross-sectional view of a carriage 1 showing a conventional rail feed device 50. [Figure 18] This is a side view. [Figure 19] This is a front view of the outrigger part (with the cart raised). [Figure 20] This is a front view of the outrigger part (with the bogie lowered). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0031] [About bogie 1 and rail feed device] First, the structures of the carriage 1 and the rail feed device will be described in detail with reference to Figs.

[0032] Examples of the cart 1 include various types of carts 1, such as a sheeting cart for laying waterproof sheets on the wall surface after excavation in the case of tunnel construction, a scaffolding cart for assembling rebar, and a centering cart for pouring lining concrete. The example shown in the figure shows an example of a centering cart.

[0033] As shown in FIG. 2, a pair of wheel devices 3 and 4 for traveling on a 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 a pair of left and right front columns 1A and 1B and a pair of left and right rear columns 1C and 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 integrally joined to 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 integrally joined to the inner central part of the U-shaped cross-section member 13 by welding or the like.

[0034] As shown in Fig. 3, an outrigger 2 having a pair of left and right jacks 6A, 6B is provided at the portion of the wheel device 3 provided at the lower end of the rear pillars 1C, 1D, straddling the rear pillars 1C, 1D in the horizontal direction. That is, the outrigger 2 is configured by legs 5A, 5B that protrude laterally from both side surfaces of the rear pillars 1C, 1D and extend downward, and the jacks 6A, 6B are provided at the lower ends of the legs.

[0035] Meanwhile, as shown in Fig. 4, the front columns 1A, 1B also have outriggers 2 equipped with a pair of left and right jacks 6A, 6B that straddle the front columns 1A, 1B laterally at the location of the wheel devices 4 provided at the lower ends of the columns 1A, 1B. That is, legs 5A, 5B are provided that protrude laterally from both side surfaces of the front columns 1A, 1B and extend downward, and the jacks 6A, 6B are provided at the lower ends of the legs to constitute the outrigger 2. Note that the outrigger 2 may also be a one-leg type outrigger instead of the two-leg type structure described above.

[0036] The four outriggers 2 are desirably arranged at the intersections of a rectangle in plan view in order to balance each other. By simultaneously contracting the jacks 6A, 6B of the four outriggers 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, the cart 1 can be raised upward.

[0037] 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 cart 1, and these winches 7 and the rear end 11a of the rail 11 are directly or indirectly connected by a wire 8, so that the rail 11 can be sent out in the forward direction 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 cart 1, but it may be disposed in another location. An electric winch can be suitably used as the winch 7.

[0038] Here, direct connection by wire 8 means a mode in which winch 7 and rear end 11a of rail 11 are directly connected without an intermediate pulley or the like, and indirect connection by wire 8 means a mode in which a pulley is used in the middle to reduce the winch hoisting force. The illustrated example shows a mode in which winch 7 and rear end 11a of rail 11 are indirectly connected via pulleys 12 and 13.

[0039] After the carriage 1 runs on the rail 11 and reaches a position almost at the front end of the rail, in order to send the rail 11 forward in the direction of travel, the carriage 1 is raised by the outriggers 2, 2 ..., and the winch 7 is operated to wind up the wire 8, thereby sending out the rail 11 in the direction of travel.

[0040] 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 placed on the ground surface, without lifting it into the air. In the case of a conventional rail sending-out mechanism using a roller chain and sprocket mechanism, scattered concrete could get tangled in the roller chain or sprocket during centering, which involves pouring concrete, and cause breakdowns. However, in the case of a rail sending-out mechanism using a winch and wire mechanism like the present invention, even if work involving handling concrete is performed, this almost never causes breakdowns, making it possible to carry out work stably.

[0041] [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 ....

[0042] (Regarding wheel device 3) The wheel device 3, that is, of the wheel devices 3 and 4, the rear wheel device 3 is provided with a wheel holder 17 that is held to be able to swing freely via a horizontal shaft 14 relative to the dolly 1, as shown in FIG. 6, and the wheel holder 17 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. When the dolly 1 is raised by the outriggers 2, 2..., the wheel holder 17 is moved by the difference in weight between the front and rear. D1Wheel 7 automatically swings so that one of front wheel 18 and rear wheel 19 comes into contact with rail 11, and the width of wheel 18 (19) on the side that comes into contact with rail 11 is set to the normal width with respect to rail 11. Each structure will be described in detail below.

[0043] The lower ends of the rear supports 1C, 1D are provided with connecting brackets 15 consisting of a pair of left and right hanging pieces that protrude downward, while the wheel holder 17 is provided with a connecting bracket 16 consisting of a pair of left and right upward extending pieces that protrude upward on its upper surface, and as shown in Figures 3 and 7, the connecting brackets 15 and 16 are connected by a horizontal shaft 14, thereby forming a structure in which the wheel holder 17 is held so that it can swing freely.

[0044] 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 driving motor 20 is mounted on the front upper surface of the wheel holder 17, and a sprocket 21 is disposed adjacent thereto. A bevel gear provided on the shaft of the driving 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 driving motor 20, and the bogie 1 is made to run.

[0045] 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 so as to be able to swing freely, and when the cart 1 is raised by the outriggers 2, 2 ..., the wheel holder 17 automatically swings in the clockwise direction as shown in the figure due to the difference in weight between the front and rear of the drive motor 20 (weight), so that the front wheels 18 are maintained in contact with the rails 11.

[0046] 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 on the side not in contact with the rail 11, i.e., the rear wheels 19, is wider relative to the rail 11 (rail body 12) as shown in Fig. 7(B).

[0047] Therefore, when the dolly 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 at the front side of the dolly 1, if there is not one fulcrum that firmly holds the rail 11, 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 at the contact position so as not to move laterally. It is desirable to set the width of the front wheels 18 to a width that has a margin of several mm to several tens of mm on each side with respect to the width of the upper part of the rail 11 (the width of the upper part of the rail main body 12).

[0048] On the other hand, the reason why the width of the wheel (rear wheel 19) on the side not in contact with the rail 11 is made wider than that of the rail 11 is to prevent the wheel from coming 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 serving as a fulcrum, the amount of lateral movement of the rail 11 is small, and it is not necessary to make the width as wide as the wheels 27, 28 of the front wheel device 4 described later, but in this embodiment, the wheel width is made 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 about several mm and falls within the margin of the normal wheel width, the rear wheel 19 can also have the normal wheel width.

[0049] 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.

[0050] (Regarding wheel device 4) On the other hand, of the wheel devices 3, 4, the front wheel device 4 is provided with a wheel holder 26 that is held to be able to swing freely via a horizontal shaft 23 relative to the dolly 1, as shown in FIG. 8, and this wheel holder 26 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. When the dolly 1 is raised by the outriggers 2, 2..., the wheel holder 26 is moved by the difference in weight between the front and rear. Da 2 6 automatically swings so that one of the front wheels 27 and the rear wheels 28 comes into contact with the rail 11, and the wheel widths of both the front wheels 27 and the rear wheels 28 are made wide.

[0051] 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, and as shown in Figure 4, the connecting bracket 24 and the connecting bracket 25 are connected by a horizontal shaft 23, thereby forming a structure in which the wheel holder 26 is held so that it can swing freely.

[0052] 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 driving motor 29 is mounted on the rear upper surface of the wheel holder 26, and a sprocket 30 is disposed adjacent thereto. A bevel gear provided on the shaft of the driving 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 driving motor 29, and the bogie 1 is made to run.

[0053] The drive motor 29 also serves as a weight that swings the wheel holder 26 when the dolly 1 is raised by the outriggers 2, 2 .... In other words, the wheel holder 26 is held so as to be able to swing freely, and when the dolly 1 is raised by the outriggers 2, 2 ..., the wheel holder 26 automatically swings in the counterclockwise direction as shown in the figure due to the difference in weight between the front and rear of the drive motor 29 (weight), so that the rear wheels 28 are maintained in contact with the rails 11.

[0054] The width of the rear wheels 28 and the front wheels 27 is wider than the rail 11 (rail main body 12). The amount (dimension) of the wider width is set so as to cover the amount of movement (A) of the rail 11 moved laterally by the rail lateral movement device 5 with the bogie 1 raised by the outriggers 2, 2.... If it is to be made compatible with R=1500m and the wheelbase (the distance between the wheel devices 3, 4) is 11m, the amount of lateral movement (A) will be approximately 60mm, so the amount of the wider width is set to be equal to or greater than the wheel width obtained by adding the amount of lateral movement (A) x 2 (for both the left and right sides) to the normal width.

[0055] (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 ....

[0056] As shown in Figure 8, the rail lateral movement device 5 comprises a frame 33 having an inverted L-shape in side view, which is composed 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 portion of the inverted L-shaped frame 33, a rail engaging device 35 is provided at the lower end of the inverted L-shaped frame 33, and a lateral movement mechanism 36 is provided to move the rail engaging device 35 laterally in a direction perpendicular to the direction of travel of the trolley.

[0057] By extending or retracting the tilt control jack 34 , the inverted L-shaped frame 33 is tilted, and the rail engaging device 35 can be controlled so as to be freely engaged with and disengaged from the rail 11 .

[0058] 9, the lateral movement mechanism 36 has a structure in which 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 a 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" is 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" is a type in which piston rods protrude from both ends of a cylinder, and the rods at both ends are integrated into a piston and behave as a unit.

[0059] The rail engaging device 35 is composed of an engaging device main body 35A having a wheel structure and a holder 35B that rotatably holds the engaging device main body 35A, and the holder 35B is supported so as to be slidable laterally with respect to the vertical frame 33B, and a cylinder connector 35C is engaged with the cylinder 36A. The engaging 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 engaging device main body 35A rotates with the sending out of the rail 11, thereby making it possible to stably support the rail 11.

[0060] By arranging the piston rods 36B, 36C of the double-acting double-rod hydraulic jack 36 in a horizontal orientation in an immovable state, the cylinder 36A moves, and in conjunction with this, the rail engagement device 35 can be moved laterally.

[0061] To move the rail 11 laterally, as shown in Fig. 8, the cart 1 is raised by the outriggers 2, 2 ..., and the inverted L-shaped frame 33 is swung downward by controlling the extension and contraction of the tilt control jack 34, so that the rail engagement device 35 engages with the rail 11. Next, the cylinder 36A is moved by driving the double-acting double-rod hydraulic jack 36, and the rail engagement device 35 is moved integrally therewith to move 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 that the rail 11 moves laterally while sliding on the underside of the rear wheels 28.

[0062] [Other examples] (1) In the above embodiment, a double-acting double-rod hydraulic jack 36 is used as the lateral movement mechanism 36, but as shown in Fig. 10, a ball screw mechanism 37 may also be used. 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.

[0063] (2) In the above embodiment, the wheel device 4 has the wheel holder 26 held so as to be freely swingable via the horizontal shaft 23, but the wheel device 4 may have a structure not having a drive mechanism using the drive motor 29 (the vehicle runs using only the wheel device 3 as the drive source) or may have a fixed wheel 40 that does not swing, as shown in Fig. 11. Even in this case, the wheel width needs to be wide.

[0064] [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.

[0065] Fig. 12 shows the state in which the cart 1 is performing work 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 traveling of the cart 1. In addition, the rail lateral movement device 5 is in a state in which the rail engaging device 35 is detached from the rail by retracting the tilt control jack 34.

[0066] FIG. 13 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 when the bogie 1 is traveling.

[0067] When the carriage 1 has reached the front end of the rail 11, the rail 11 is repositioned and the carriage 1 moves laterally to prepare the rail 11 for curved running.

[0068] As shown in Fig. 14, the entire dolly 1 is raised by extending the jacks 6A, 6B of the four outriggers 2, 2 .... In this case, when the dolly 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 are maintained in 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 are maintained in 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 tool 35 is brought into engagement with the rail 11.

[0069] Once the preparation work up to this point is complete, the rail 11 is moved laterally by driving the lateral movement mechanism 36 of the rail lateral movement device 5. Fig. 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 movement along the rail. As shown in Fig. 15, since the front wheel 18 of the wheel device 3 firmly holds the rail 11, the position of the front wheel 18 functions as a fulcrum P, and the rail 11 rotates in the horizontal direction with the position P of the front wheel 18 as the center of rotation.

[0070] 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 Figure 16. During sending out, the rail 11 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 the rail 11 is sent out straight forward without any lateral wobble.

[0071] When the sending out of the rail 11 is completed, the jacks 6A, 6B of the outriggers 2, 2 ... are retracted to lower the entire carriage 1 so that the wheels 18, 19 of the wheel device 3 and the wheels 27, 28 of the wheel device 4 are placed on the rail 11, and the rail lateral movement device 5 retracts the tilt control jack 34 to disengage the rail engaging device 35 from the rail 11. At this time, since the wheels 27, 28 of the wheel device 4 are both wide wheels, the wheels 27, 28 will not come off the rail 11.

[0072] The above-mentioned procedure makes the bogie 1 ready to travel. By repeating these procedures, the bogie 1 becomes capable of moving forward while traveling along a curve in the tunnel.

[0073] [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. [Explanation of symbols]

[0074] 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

1. 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 trolley equipped with a rail feeding device, characterized in that a rail lateral movement device is provided on the front side of the trolley for laterally moving the rail in a direction perpendicular to the traveling direction when the trolley is raised by the outriggers.

2. A bogie equipped with a rail feed device as described in claim 1, in which in the rear wheel device, the wheel holder is provided with a drive motor, and this drive motor is used as a driving force to drive the wheels to run the bogie, and also serves as a weight to cause the wheel holder to oscillate when the drive motor raises the bogie by the outriggers.

3. 3. A bogie equipped with a rail feeding device according to claim 1, wherein in the rear wheel device, the width of the wheel on the side not in contact with the rail is made wider.

4. 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.

5. The rail lateral movement device is provided with a rail engaging device that can be freely engaged and disengaged with the rail, a reciprocating double-rod hydraulic jack is arranged in a horizontal orientation with its piston rod immovable, and the rail engaging device is connected to a cylinder of the reciprocating double-rod hydraulic jack.

6. The rail lateral movement device is provided with a rail engaging device that can be freely engaged and disengaged with the rail, a ball screw is arranged in a horizontal orientation, and the rail engaging device is connected to a slider of the ball screw. A cart equipped with a rail feed device described in any one of claims 1 to 4.

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