JP2007008239A - Working vehicle capable of running on tracks - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To even manually move a working vehicle that can run on tracks for a railway by providing with a working machine mounting device capable of elevating a working machine at a front or rear part. <P>SOLUTION: This working vehicle 1 comprises guide wheels 4F, 4R for rail traveling on front, rear, right and left sides, supports the guide wheels 4F, 4R by front, rear, right and left arms 29F, 29R, and can elevate and rotate the arms 29F, 29F, 29R, 29R. A manual jack 72 is mountably constituted between the front and rear arms 29F, 29R, and is actuated to rotate the arms 29F, 29R downward, so that this machine can be raised. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a multipurpose work vehicle capable of traveling on a track (railway rail), and more particularly to a technique that enables a work vehicle that has stopped moving on a railroad rail due to an engine trouble or the like to move quickly.

  Conventionally, a backhoe having a crawler type traveling device has been operated while traveling on railroad rails, and arms can be moved forward and backward from the track frame of the traveling device so as to travel along the railroad rails. It protrudes, and rails for guiding rails for rails are rotatably mounted on the left and right sides of the tip of the arm, and the arm can be moved up and down by a hydraulic cylinder or the like (see Patent Documents 1 and 2). And when traveling on railroad rails, lower the arm and place the guide wheels along the railroad rails, and when traveling on roads other than railroad rails, raise the arm, The guide wheels were kept away from the rail for rail.

JP 2003-63223 A JP-A-63-47401

  In the case of providing a guide wheel so that it can run on railroad rails while leaving the basic configuration of such a crawler type backhoe, it was configured to remove the blade and attach the guide wheel instead. In order to raise the airframe, it is necessary to operate the hydraulic cylinder. Therefore, if the engine stops due to a trouble such as a fuel system or an electric system, the airframe cannot be lifted and the airframe cannot be moved.

  If the airframe cannot be moved on the rail for the railway as described above, it will cause trouble for the train operation, which will cause great confusion.

  In view of the above, an object of the present invention is to provide a work machine mounting device that can raise and lower a work machine at the front or rear, and to be configured so that a work vehicle that can travel along railroad rails can be moved manually.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, a work vehicle is provided with rail traveling guide wheels on both the front, rear, left, and right sides of the machine, the guide wheels are supported by front, rear, left and right arms, and the arms can be turned up and down. A manual jack can be attached between the front and rear arms, and the machine can be lifted by operating the jack and rotating the arm downward.

  According to a second aspect of the present invention, a pivot that serves as a pivot for the left and right arms is constituted by a central shaft and left and right outer shafts, and the central shaft and the outer shaft are connected via a detachable connecting member. The first lifting link for connecting the lifting actuator between the central shafts of each of them protrudes from the central shaft, and the second lifting link for mounting the manual jack between the front and rear outer shafts protrudes from the outer shaft, respectively It is a thing.

  According to a third aspect of the present invention, a lock mechanism for locking the rotation of the guide wheel is provided at the tip of the arm.

  As effects of the present invention, the following effects can be obtained.

  In claim 1, a work vehicle mounting device that allows the work machine to be moved up and down at the front or rear, and that supports a work vehicle that can run along a rail for a rail only by attaching a compact jack, is supported. It can be easily rearranged to the construction to be done. In other words, a work vehicle that can be moved manually can be easily configured without increasing the number of parts.

  According to the second aspect of the present invention, the rotation of the outer shaft is not affected by the guide wheel lifting mechanism fixed to the central shaft by releasing the fixing of the central shaft and the outer shaft. Therefore, the arm fixed to the outer shaft can be rotated regardless of the guide wheel lifting mechanism.

  According to the third aspect, by locking the guide wheel, it is possible to prevent the work vehicle from moving unintentionally against the operator's intention.

Next, embodiments of the invention will be described.
FIG. 1 is a side view showing an overall configuration of a work vehicle according to an embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a plan view showing the configuration of a frame, and FIG. FIG. 5 is a side view showing the length of the guide wheel arm and the lifting link, FIG. 6 is a plan view showing the support structure of the pivot, FIG. 7 is a perspective view, and FIG. 8 is the guide wheel and its support. FIG. 9 is a plan view showing a guide wheel lifting mechanism. FIG. 10 is a side view showing a work vehicle that has been rearranged so that it can be moved manually, FIG. 11 is a plan view showing the work vehicle that has been rearranged so that it can be moved manually, and FIG. 13 is a side view showing lifting of the vehicle body, FIG. 14 is a plan view showing a state where a jack is attached, FIG. 15 is a plan view showing a state where a manual handle is attached, and FIG. 16 is a state where a guide wheel locking mechanism is attached. FIG. 17 is a plan sectional view showing the guide wheel.

  A working vehicle 1 capable of running on a track according to an embodiment of the present invention includes a snow removal device 2 as a working machine, and a crawler type traveling device 3 and 3 and a guide wheel 4F for traveling on a track (hereinafter referred to as rail for rail) 41. 4F, 4R, 4R, etc.

First, the overall configuration of the work vehicle 1 capable of running on a track will be described with reference to FIGS. 1 and 2.
The body frame 5 is placed on the crawler type traveling device 3, the snow removal device 2 is mounted as a work machine through the front work machine mounting device 50 in front of the machine frame 5, and the rear work machine is behind the machine frame 5. The mounting device 60 is arranged so that the work machine can be mounted. The working machine is not limited to a snow remover or a mower.
On the body frame 5, the driving unit 6 is disposed on the front part, the seat 7 is disposed on the front and rear center, and the engine serving as a prime mover is placed on the rear part of the body frame 5 and covered with the bonnet 8. Power from the engine is transmitted to the drive wheels 10 of the crawler type traveling device 3, the front PTO shaft 22 protruding forward from the body frame 5, and the rear PTO shaft 23 protruding rearward from the body frame 5 via the transmission. Yes.

The frame configuration of the aircraft will be described.
As shown in FIGS. 1 and 3, the fuselage frame 5 includes a track frame 11 and 11, a front horizontal frame 48F, a rear horizontal frame 48R, front support frames 44 and 44, front side frames 45 and 45, and front and rear supports. The frame 46, 46, the rear support frame 47, the guard frame 17, and the like.
The front horizontal frame 48F and the rear horizontal frame 48R are fixed between the pair of left and right track frames 11 and 11 arranged in the front-rear direction and horizontally laid in the left-right direction with a predetermined distance therebetween. . The front support frames 44 and 44 extend in parallel to the front from the left and right central portions of the front horizontal frame 48F with a predetermined left and right spacing. The front outer frames of the front support frames 44 and 44 and the track frame 11 The front side frames 45 and 45 are supported obliquely so as to spread rearward and outward between the front inner surface of 11 and the rear side. The front and rear support frames 46 and 46 are fixed horizontally between the front horizontal frame 48F and the rear horizontal frame 48R with a space in the left-right direction and in the front-rear direction. The rear support frame 47 is erected from the upper left and right central upper surfaces of the rear horizontal frame 48R.

  The guard frame 17 is configured to have a substantially U shape in plan view, and includes a front support body 15 that rises in front and above the front horizontal frame 48F, and a guard frame 17 that stands up above the rear support frame 47. A guard frame 17 is fixedly provided by a rear support 16 that rises rearward and upward from the upper part.

  The driving unit 6 includes a steering handle 20, a seat 7, operating levers, and the like, and is disposed on the front portion of the guard frame 17. A floor 18 is stretched at the front of the guard frame 17, a steering column 19 is erected on the front of the floor 18, and a steering handle 20 is attached to the upper end of the steering column 19. The seat 7 is arranged at the rear position of 20. A main speed change lever, a sub speed change lever, a work machine operation lever, and the like are arranged on the side of the seat 7. In addition, an operation unit 51 of the snow removal device 2 serving as a front work machine is disposed on a side portion of the steering column 19.

  A transmission case (not shown) is supported between the front portions of the front support frames 44 and 44, and the front PTO shaft 22 projects forward from the transmission case. Further, the front lower links 52 and 52 protrude from the front support frames 44 and 44, and the attachment portion of the snow removal device 2 is supported at the front ends of the front lower links 52 and 52. Further, a bracket 53 is erected on the left and right center of the front end of the guard frame 17, and the bracket 53 pivotally supports the base side of an elevating cylinder 54 made of a hydraulic cylinder as an actuator, and the piston rod end of the elevating cylinder 54 is attached to the snow removal. The work implement is pivotally supported on the attachment portion of the apparatus 2 and can be mounted so as to be movable up and down by expansion and contraction of the lift cylinder 54. Power is transmitted to the front PTO shaft 22 to the input shaft of the snow removal device 2 via a universal joint, a transmission shaft or the like, and a blower, a take-up auger or the like is driven.

  Further, a transmission case and a transmission shaft extend from the rear of the transmission case, and the rear PTO shaft 23 protrudes rearward from the transmission case supported by the rear support frame 47, and rear work is performed rearward of the rear PTO shaft 23. The power can be transmitted to the working machine connected via the machine mounting device 60. The rear work machine mounting device 60 includes a lower link 61, a lift arm 62, a lift rod 63, and the like. The lift rod 63 is pivotally connected between the tip of the lift arm 62 and the front and rear middle portions of the lower link 61. A work machine can be connected to the rear end of 61 and a top link (not shown) connected to a top link bracket 64 fixed to the rear portion of the rear support frame 47. The work implement can be raised and lowered by rotating the lift arm 62 with a hydraulic cylinder (not shown).

  The crawler type traveling device 3 includes a driving wheel 10, a track frame 11 disposed in the front-rear direction, driven wheels 12, 13 and rolling wheels 21, 21 attached to the track frame 11, a crawler belt 14, and the like. The driven wheel 12 is rotatably supported at the front end of the track frame 11, and the driven wheel 13 is rotatably supported at the rear end. .. Are rotatably disposed between the driven wheels 12 and 13. A crawler belt 14 is wound around the driven wheels 12, 13, the rolling wheels 21, 21...

Next, the support structure of the guide wheels 4F · 4F, 4R · 4R will be described.
As shown in FIGS. 1 to 4, the left and right front guide wheels 4F and 4F are arranged in front of the machine body and behind the front work machine, that is, between the crawler type traveling device 3 and the snow removal device 2. . In addition, left and right rear guide wheels 4R and 4R are arranged behind the machine body and ahead of the rear work machine, that is, between the crawler type traveling device 3 and the rear work machine. The guide wheels 4F, 4F, 4R, 4R are rotatably supported at the tips of the arms 29F, 29F, 29R, 29R, respectively, and are arranged on the front, rear, left, and right of the crawler type traveling device 3.

  That is, the guide wheels 4F, 4F, 4R, and 4R have substantially the same configuration, and an edge is formed on the side surface of the annular grounding portion, and the outer periphery of the annular portion is grounded on the rail 41 for railway, Is arranged on the inner side of the machine body so as to be in contact with the upper part of the rail 41 for railway and guide it so as not to be removed. A shaft hole is provided at the center of the guide wheels 4F, 4F, 4R and 4R, and the axles 40F and 40F and 40R and 40R are inserted and fixed. The left and right centers of the annular portions of the guide wheels 4F, 4F, 4R, and 4R are arranged to substantially coincide with the left and right centers of the driven wheels 12 and 13 and the rolling wheel 21. The axles 40F, 40F, 40R, 40R are supported at the tips of the arms 29F, 29F, 29R, 29R so as to be rotatable inward in the horizontal direction. The front end (front end) of the arm 29F supports the axle 40F and rotatably supports the guide wheel 4F, and the base end (rear end) is fixed to the outer end of the pivot 27F. The front end (rear end) of the arm 29R supports the axles 40R and 40R, and the base end (front end) is fixed to the outer end of the pivot 27R. The arm 29F and the arm 29R have the same length. Therefore, the front, rear, left and right guide wheels 4F, 4F, 4R, 4R are supported by the same configuration.

  The pivots 27F and 27R are disposed inside the crawler type traveling device 3 in a side view and are rotatably supported via support members 43F and 43F and 43R and 43R below the track frames 11 and 11, respectively. That is, the support member 43F is fixed to the lower surface of the track frame 11 and below the front lateral frame 48F at the rear portion of the rear attachment position of the front side frame 45, and above the wheel 21 and the wheel 21. A support member 43F is arranged to rotatably support the pivot shaft 27F. Further, a support member 43R is fixed on the lower surface of the track frame 11 at the front lower side of the rear horizontal frame 48R and between the wheel 21 and the wheel 21, and the pivot 27R is rotatably supported. As described above, the pivot shafts 27F and 27R are arranged close to the rigid horizontal frames 48F and 48R, so that the deformation of the pivot shafts 27F and 27R is small, and the rotation can be performed smoothly. By doing so, the guide wheels 4F and 4F (4R and 4R) on both the left and right sides can be lifted and lowered simultaneously. And by arranging the front and rear pivots 27F and 27R in the front-rear direction so as to be separated from each other so that the hydraulic cylinders can be arranged, the lift links 36F and 36R described later can be directly driven, and a complicated link mechanism becomes unnecessary. Since only one hydraulic cylinder is required, the cost can be reduced.

  The mounting structure of the support members 43F / 43F, 43R / 43R will be described in detail. As shown in FIGS. 3, 6, and 7, plate-like brackets 42F / 42F, 42R / 42R are provided on the lower surface of the track frame 11. Bolt holes are opened at the four corners of the bracket 42F. The support member 43F shown in FIGS. 6 and 7 is composed of a mounting plate 43Fa and a support pipe 43Fb. The mounting plate 43Fa is bent in a substantially inverted U shape when viewed from the front to open the lower side, and the upper surface is aligned with the bolt hole. The bolt hole is opened and the bracket 42F is fixed with the bolts 33, 33, 33 and 33. A support pipe 43Fb is provided horizontally on the lower surface of the mounting plate 43Fa, and a pivot 27F is inserted into the support pipe 43Fb for support. The support member 43R has the same configuration, is fixed to the bracket 42R, and supports the pivot 27R.

  The pivots 27F and 27R are arranged in the horizontal direction, and both ends extend further outward than the left and right outer ends of the crawler type traveling device 3, and the arms 29F are forward or backward from both ends of the pivots 27F and 27R.・ 29F, 29R and 29R are projected. Boss 29Fa, 29Ra is provided at the tip of arm 29F, 29R, and as shown in Drawing 8, axles 40F, 40R are supported rotatably via a bearing. The axles 40F and 40R of the guide wheels 4F and 4R protrude toward the fuselage from the tips of the arms 29F and 29R. The pivot shaft 27F (27R), the arm 29F (29R), and the guide wheel axle 40F (40R) A character-shaped frame is formed. However, the axle 40F (40R) may be provided horizontally at the tip of the arm 29F (29R), and the guide wheel 4F (4R) may be rotatably supported on the axle 40F (40R) via a bearing.

  In this way, the arms 29F, 29F, 29R, 29R are arranged outside the crawler type traveling device 3, that is, the front arm 29F is located outside the front driven wheel 12, and the rear arm 29R is Arms 29F / 29F, 29R / 29R which are arranged outside the rear driven wheel 13 and are arranged to wrap around the crawler type traveling devices 3, 3 from the inside of the crawler belt 14 to the front / rear outside. Thus, the guide wheels 4F, 4F, 4R and 4R are supported. However, the same configuration can be adopted when the driving wheel is positioned before or after the track frame 11.

  With this configuration, the arms 29F and 29F and the front work machine mounting device 50 can move up and down without interfering with each other, and the arms 29R and 29R and the rear work machine mounting device 60 interfere with each other. The front work machine mounting device 50 and the rear work machine mounting device 60 do not need to be removed, the guide wheels 4F, 4F, 4R, and 4R can be attached, and there is no need to change the design. . Also, since the bases of the arms 29F and 29F and 29R and 29R are attached to the lower part of the track frame 11, the center of gravity can be lowered and stable running is possible. The lateral displacement relative to the rail for railroad can be suppressed as compared with supporting the bases of 29F / 29F and 29R / 29R.

  An elevating mechanism 31 for elevating and lowering the guide wheels 4F, 4F, 4R, and 4R is disposed between the front pivot 27F and the rear pivot 27R, and on the outer side of the track frame 11 that supports the pivots 27F and 27R. The stoppers 32F and 32R for setting the highest positions of the arms 29F and 29R are projected.

The lifting mechanism 31 for the guide wheels 4F, 4F, 4R and 4R will be described.
As shown in FIGS. 3 and 4, the lifting mechanism 31 of the guide wheels 4F, 4F, 4R, and 4R includes a hydraulic cylinder 38 that serves as an actuator, and first lifting links 36F and 36F, 36R and 36R. The lifting mechanism 31 is disposed inside the crawler belt 14 in a side view, and is disposed above the front and rear pivots 27F and 27R. In the plan view, the lifting mechanism 31 is disposed in the vicinity of the left and right track frames 11.

  As described above, when the lifting mechanism 31 is disposed in conjunction with the front and rear pivots 27F and 27R via a link or the like as will be described later, the hydraulic cylinder 38 serving as a lifting actuator can be downsized. It is possible to make the lifting mechanism 31 small and compactly arranged, and by arranging the hydraulic cylinder 38 in the upper part, it is possible to avoid the splashing of mud or the like as much as possible.

  Further, by placing the hydraulic cylinder 38 close to the left and right sides, maintenance is facilitated and the vehicle height at the center of the left and right is not lowered. In addition, since the front and rear guide wheels can be raised and lowered with a single lifting drive mechanism, the number of parts can be reduced, the piping can be shortened, and the cost can be reduced.

  As shown in FIGS. 6, 8, and 14, the pivot 27 </ b> F to which the lifting links 36 </ b> F and 36 </ b> F are fixed is configured in a cylindrical shape and disposed between the center frame 27 </ b> Fa between the left and right track frames 11. The outer shafts 27Fb and 27Fb are arranged in the shape of a shaft and arranged on the left and right sides of the central shaft 27Fa. The outer shafts 27Fb and 27Fb are rotatably inserted into the central shaft 27Fa, and both are fixed by connecting bolts 70 and 70 as detachable connecting members. In other words, bolt holes are opened on both sides of the central shaft 27Fa and the left and right central sides of the outer shafts 27Fb and 27Fb, and are fixed by the connecting bolts 70 and 70 to form a single pivot 27F. Is configured. The rear pivot 27R is similarly configured. Both ends of the central shafts 27Fa and 27Ra are in contact with the support pipes 43Fb and 43Rb of the mounting plate. The first elevating links 36F, 36F, 36R, 36R are fixed to the central shafts 27Fa, 27Rb and protrude upward in the front-rear center.

  As shown in FIGS. 4 and 9, the elevating links 36F and 36F, 36R and 36R are formed in a substantially “<” shape, and the base of the elevating link 36F is fixed to the central shaft 27Fb of the front pivot. The elevating link 36F extends rearward and obliquely upward and pivotally supports the tip of the piston rod 38a of the hydraulic cylinder 38 at the tip. A base portion of a lifting link 36R is fixed to the central shaft 27Ra of the rear pivot, and the lifting link 36R extends obliquely upward to pivotally support the bottom side of the hydraulic cylinder. In this way, as a configuration in which the lifting links 36F, 36R are extended obliquely upward from the pivots 27F, 27R in the front-rear center and then extended upward, the hydraulic cylinder 38 is disposed so as to face substantially horizontal, Even when the hydraulic cylinder 38 expands and contracts, the posture can be maintained substantially in the front-rear horizontal direction, and a biased load is prevented from being applied to one lifting link or the like. However, the piston rod 38a may be attached to the elevating link 36R.

Further, a time difference is provided between the raising / lowering timing of the front guide wheel 4F and the raising / lowering start timing of the rear guide wheel 4R. That is, as shown in FIGS. 4 and 5, the arm lengths of the front and rear elevating links 36F and 36R are configured such that one is longer than the other. In this embodiment, the length L1 of the front lifting link 36F is longer than the length L2 of the rear lifting link 36R (L1> L2). The arms 29F and 29R have the same length L3, and the guide wheels 4F and 4R have the same size and the same weight.
Also, as shown in FIGS. 4 and 6, stoppers 32F and 32R configured in a bar shape are projected in parallel outward from the side surface of the track frame 11, and the stoppers 32F and 32R are connected to the arms 29F and 29R. The protruding length is set so as to abut. The front stopper 32F is disposed obliquely forward and upward of the pivot 27F, the rear stopper 32R is disposed obliquely rearward and upward of the pivot 27R, and the upper surfaces of the stoppers 32F and 32R are moved upward by rotating the arms 29F and 29R. In the position where it stops at the hit, the lower ends of the guide wheels 4F, 4R can be raised to the same level as the lowest ground clearance of the main body. In this way, the guide wheels 4F and 4R are raised so as not to get in the way when traveling on the road or the like.

  In such a configuration, when the guide wheels 4F and 4R are lifted from the lowered state, when the hydraulic cylinder 38 is reduced, the front guide wheel 4F and the rear guide wheel 4R have the same weight and the arms 29F and 29R have the same length. Since the elevating link 36F is longer than the elevating link 36R, the elevating link 36F rises from the front guide wheel 4F having a small lifting force. That is, as the hydraulic cylinder 38 is reduced, the lift link 36F rotates clockwise around the pivot 27F in FIG. Then, when the arm 29F comes into contact with the stopper 32F, the ascent is stopped, the hydraulic cylinder 38 is further reduced, the rear lifting link 36R rotates counterclockwise around the pivot 27R, and the arm 29R together with the guide wheel 4R. When the arm 29R comes up and comes into contact with the stopper 32R, the ascending rotation is stopped. Thus, the guide wheels 4F and 4R are maintained at the raised position.

Conversely, when lowering the guide wheels 4F, 4R, if the hydraulic cylinder 38 is reduced, the hydraulic cylinder 38 is lowered by its own weight, and the reverse operation of the rear arm 29R with a large operating force is performed by the reverse operation. . When the rear guide wheel 4R reaches the rail rail upper surface, the front arm 29F starts to rotate downward, the guide wheel 4F reaches the rail rail, and the extension of the hydraulic cylinder 38 is stopped.
However, if the hydraulic cylinder 38 is reduced by reducing the length of the front and rear elevating links 36F and 36R on the opposite side, the hydraulic guide 38 can be raised from the rear guide wheel 4R, and the hydraulic cylinder 38 can be extended. It can be lowered from the front guide wheel 4F.

  In addition, the lengths of the arms 29F and 29R can be changed so that a single hydraulic cylinder 38 has a time difference in the elevation of the front and rear guide wheels. That is, the elevating links 36F and 36R have the same length, the guide wheels 4F and 4R are configured in the same manner, the front arm 29F is shorter than the rear arm 29R, and is lifted from the front side and lowered from the rear side. You can also The elevating links 36F and 36R have the same length, and the rear arm 29R or the rear guide wheel 4R is heavier than the front arm 29F or the front guide wheel 4F, so that it is raised from the front side and lowered from the rear side. It is also possible to configure it. In this case, the weight of the arm or the guide wheel itself may be changed, or the weight may be attached.

  By configuring in this way, when traveling along a railroad rail from running on the road, the railroad rail is set so that the longitudinal direction of the airframe is parallel to the direction of the railroad rail so that the aircraft is along the railroad rail. The crawler traveling device 3 is positioned above. Then, the guide wheels 4F and 4R are lowered to be along railroad rails. However, if the front and rear guide wheels 4F and 4R are simultaneously lowered, it is very difficult to simultaneously fit the edges inside the railroad rails. Therefore, by setting the fuselage along the rail for the rail, the rear guide wheel 4R is lowered as described above, and the front guide wheel 4F is stopped at the raised position, so that the fuselage is moved relative to the rail for the rail. Even if they are slightly deviated from each other, the rear guide wheel 4R can be made to follow the rail for rail by traveling along the rail for rail. From this state, the front guide wheel 4F is further lowered. At this time, even if the positions of the guide wheels 4F and the rails for the rail are slightly deviated, the front and rear guide wheels 4F and 4R can be made to follow the rails for easy correction by steering operation.

  In this embodiment, the lifting actuator uses a hydraulic cylinder, but an electric cylinder can also be used. In this case, ascending / descending control can be easily performed and piping is not required, so that the surroundings can be simplified. In addition, the lifting and lowering link connected to the hydraulic cylinder is rotated by the expansion and contraction of the hydraulic cylinder so that the front and rear arms are turned up and down. The guides 4F, 4F, 4R and 4R can be moved up and down by rotating the lifting link. Also, gears are fixed on the front and rear pivots, gears are provided so as to mesh with the respective gears, and the gears are rotated by a motor or the like so as to raise and lower the guide wheels 4F, 4F, 4R, and 4R. It can also be configured. Further, the elevating link can be connected to the hoisting machine via a wire, and the guides 4F, 4F, 4R, 4R can be moved up and down by the rotation of the hoisting machine.

  Next, a configuration for enabling the work vehicle 1 to be manually moved in an emergency such as when the work vehicle 1 stops on the rail due to an engine trouble or the like will be described with reference to FIGS. I will explain.

First, a configuration for lifting the vehicle body will be described. In addition, since it arrange | positions symmetrically back and forth, right and left, the front part left side is demonstrated.
As shown in FIGS. 12 and 14, the second elevating link 82 </ b> F (82 </ b> R) protrudes upward from a portion of the outer shaft 27 </ b> Fb (27 </ b> Rb) exposed to the outside of the support pipe 43 </ b> Fb (43 </ b> Rb). By attaching a manual jack 72 between 82F and 82R and extending the jack 72, the lifting links 82F and 82R are rotated forward and rearward, and the arms 29F and 29R are rotated downward to guide the guide wheel 4F.・ The 4R is grounded to lift the aircraft.
However, since the outer shaft 27Fb is connected to the hydraulic cylinder 38 via the central shaft 27Fa and the lift links 36F and 36F, the outer shaft 27Fb cannot be lifted as it is. However, as described above, there is no space between the outer shaft 27Fb and the central shaft 27Fa. Since the connection bolts 70 are connected and fixed, the outer shaft 27Fb can be rotated by removing the connection bolts 70 in an emergency.
In the present embodiment, the central shaft 27Fa (27Ra) and the outer shaft 27Fb (27Rb) are connected by the bolt 70, but the connection between the central shaft and the outer shaft can be released. The pin is not limited to a bolt, and a pin, a lock member, or the like can be used.
Further, although the jack 72 is a panda graph type in this embodiment, a rack type, a screw type, a hydraulic type or the like can be used and is not limited.

Next, an embodiment using a pantograph jack 72 will be described.
The jack 72 includes left and right first arms 73 and 73, left and right second arms 74 and 74, a U-shaped bracket 75 that pivotally supports the first arms 73 and 73, and a second arm. A U-shaped bracket 76 that pivotally supports 74 and 74 and a screw shaft 77 disposed between the first arm 73 and the pivotal members 78 and 79 of the second arm 74 are configured. One end of the screw shaft 77 is rotatably supported by the one pivot member 79, the tip end side of the screw shaft 77 is screwed to the other pivot member 78, and the end of the other screw shaft 77 is A bracket 80 is fixed to the tip of the screw shaft 77 so as to protrude outside the machine body, and a jack handle 81 is supported on the bracket 80.

Clamping plates 84, 84, 85, and 85 project from the U-shaped brackets 75 and 76 of the jack 72, and second lifting links 82F and 82R are provided on the clamping plates 84, 84, 85, and 85, respectively. The pivot pins 86 and 86 are inserted through the pinch and pivotally supported with respect to the jack 72.
In such a configuration, when the jack handle 81 is rotated and moved so that the pivot members 78 and 79 approach each other, the space between the U-shaped brackets 75 and 76 is widened, and the second elevating links 82F and 82R. Is rotated to the front and rear, the arms 29F and 29R are rotated downward, and the crawler type traveling device 3 is lifted from the state where the guide wheels 4F and 4R are grounded. However, it is also possible to construct the apparatus such that the lift link protrudes downward and the front and rear lift links are attracted to raise the machine. Moreover, when the lifting force of a jack is large, it can also be comprised so that it may lift with one jack.

The panda graph type jacks 72 are attached to the left and right sides of the work vehicle 1 and lift the left and right crawler type traveling devices 3 and 3 to the same height.
As described above, the guide wheels 4F, 4F, 4R, and 4R extend the hydraulic cylinder 38 that serves as an actuator and rotate the arm downward to ground the reel so that the guide wheels 4F, 4F, 4R, and 4R can be guided by the rail and run. , The connecting bolts 70 and 70 are removed, the lifting operation by the hydraulic cylinder 38 is stopped, and the arm 29 and 29 can be further rotated downward by the jack 72 to lift the machine. Thus, the vehicle body can be easily lifted simply by attaching the compact jack 72, and the state in which the vehicle body is supported only by the guide wheels 4F, 4F, 4R and 4R can be maintained.

Next, the guide wheel lock mechanism and the manual operation handle will be described. The guide wheel locking mechanism may be disposed on at least two wheels on the left and right sides of the four wheels. Moreover, since it is provided symmetrically, the left and right sides will be described.
As shown in FIGS. 10 and 15, a manual operation handle 87 is detachably provided on the top link bracket 64. The manual operation handle 87 is attached in an emergency, and is usually stored in an arbitrary position of the machine body. The manual operation handle 87 has a base portion 87a formed in a substantially U shape in plan view, and a grip portion 87b is fixed in the horizontal direction so as to close the open side of the base portion 87a. A base 87c extends from the center of the left and right sides to the front and lower side on the opposite side of the open side, mounting plates 88 and 88 are fixed to the tips of the base 87c, and the mounting plates 88 and 88 are inserted between the top link brackets. It is detachably attached with bolts or the like.

On the other hand, a guide wheel locking mechanism 90 is attached in the vicinity of the tip of the arm 29, in the present embodiment, in the vicinity of the rear guide wheels 4R and 4R, and is operated by operating means provided on the grip portion 87b of the manual operation handle 87. The lock / release operation is configured.
The guide wheel locking mechanism 90 includes a lock wheel 92 fixed to the axle 40R and a lock pin 91 attached to the boss 29Ra so as to be slidable in the left-right direction. The lock pin 91 is connected to the operating means via the wire 28. .

That is, as shown in FIG. 16, a lock wheel 92 is fixed on the axle 40R inside the fuselage of the guide wheel 4R, and pin holes 93, 93... Is provided so that the lock pin 91 can be inserted. The lock pin 91 is slidably supported by a U-shaped bracket 94 in plan view, and a compression spring 95 is fitted on the outer periphery of the lock pin 91 in the bracket 94 to lock the lock pin 91. The wheel 92 is biased toward the wheel 92 side. Thus, normally, the lock pin 91 is fitted in the pin hole 93 and locked so that the guide wheel 4R does not rotate.
The bracket 94 is detachably attached to a mounting bracket 96 fixed to a boss 29Ra at the tip of the arm 29R with bolts 97.
An operation lever 24 is attached to the manual operation handle 87 as operation means for operating the guide wheel lock mechanism 90.

In such a configuration, when the machine is to be moved in an emergency, the guide wheel lock mechanism 90 and the manual operation handle 87 are attached, the lock pin 91 is inserted into the pin hole 93, and the guide wheels 4R and 4R are attached. Stay fixed.
Then, the jacks 72, 72 are attached between the left and right second lifting links 82F, 82R, and the connecting bolts 70, 70, 70, 70 are removed. In this state, the jack handle 81 is rotated, the arms 29F and 29R are rotated downward, and the crawler type traveling device 3 is lifted.
In this state, when the lever 24 provided on the manual operation handle 87 is grasped, the wire 28 is pulled, and the lock pin 91 comes out of the hole 93 of the lock wheel 92 against the biasing force of the spring 95, and the guide wheel 4R. -The lock of 4R is released and it becomes free, and it can be moved in the desired direction by the guide wheels 4F, 4F, 4R, 4R by holding and pushing the manual operation handle 87. By releasing the lever 24, the compression spring 95 pushes the lock pin 91 into the pin hole 93, the lock pin 91 is returned to its original position, and the guide wheel 4R is locked again.

  That is, the guide wheel lock mechanism 90 keeps the guide wheel 4R locked except when the lever 24 is gripped, and releases the locked state of the guide wheel 4R only when the lever 24 is gripped. . In this way, it cannot be moved except when the operator is holding the manual operation handle 87, and it is prevented from being naturally moved by its own weight by mistake on an inclined ground.

  In the present embodiment, the manual handle 87 and the guide wheel lock mechanism 90 are attached when manually moved. However, the manual handle 87 and the guide wheel lock mechanism 90 are attached when the vehicle is driven by the traveling vehicle. You may keep it. In such a case, the lock pin 91 of the guide wheel locking mechanism 90 is fixed in a state of being removed from the guide wheel 4R. In this embodiment, the guide wheel lock mechanism is provided on the rear guide wheels 4R and 4R. However, the mounting position of the guide wheel lock mechanism is not limited to the rear guide wheels 4R and 4R, and the front guide wheels 4R and 4R are not provided. You may attach to wheel 4F * 4F.

The side view which showed the whole structure of the working vehicle which concerns on one Example of this invention. FIG. The top view which shows the structure of a flame | frame. The side view which shows the raising / lowering mechanism of a guide wheel. The side view which shows the arm of a guide wheel and the length of a raising / lowering link. The top view which shows the support structure of a pivot. Similarly perspective view. FIG. 5 is a plan sectional view showing the guide wheel and its support member. The top view which shows a guide wheel raising / lowering mechanism. The side view which shows the work vehicle rearranged so that it can move manually. The top view which shows the work vehicle rearranged so that it can move manually. The side view which shows the state which attached the jack. The side view which shows the raising of a vehicle body. The top view which shows the state which attached the jack. The top view which shows the state which attached the handle for manual operation. The top sectional view showing the state where the guide wheel lock mechanism was attached. The figure which shows the foil of a guide ring.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work vehicle 3 Crawler type traveling apparatus 4F Guide wheel 4R Guide wheel 11 Track frame 27F Axis 27Fa Central axis 27Fb Outer shaft 27R Axis 27Ra Central axis 27Rb Outer shaft 29F Arm 29R Arm 31 Elevating mechanism 36F Elevating link 36R Elevating link 72 Connecting bolt 70 Jack 82F Second lifting link 82R Second lifting link 90 Guide wheel lock mechanism

Claims (3)

  A work vehicle having rail running guide wheels on both the front, rear, left and right sides of the machine, supporting the guide wheels with front, back, left and right arms, and allowing the arms to be turned up and down. A work vehicle capable of running on a track, characterized in that a jack can be attached and the machine can be lifted by operating the jack and rotating an arm downward.   The pivot that serves as a pivot for the left and right arms is composed of a central shaft and left and right outer shafts, and the central shaft and the outer shaft are connected via a detachable connecting member, and are moved up and down between the front and rear central shafts. The first elevating links for connecting the actuators are respectively projected from the central shaft, and the second elevating links for attaching the manual jack between the front and rear outer shafts are respectively projected from the outer shaft. A work vehicle capable of running on a track according to claim 1. The work vehicle according to claim 1 or 2, wherein a lock mechanism for locking rotation of the guide wheel is provided at a tip of the arm.

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