JP2008137572A - Vehicle for both road and track - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle for both a road and a track capable of enhancing the rigidity of a member for holding a wheel for track travel. <P>SOLUTION: The vehicle for both road and track comprises a vehicle body 2 capable of traveling on a road, and a track traveling device 10 composed of holding members 11 provided on the right and left sides of the vehicle body 2 in a vertically rocking manner, and wheels 12 for track travel which are rotatably held by the holding member 11. The vehicle further comprises a connection member 41 which is fixed to a lower part of the vehicle body 2 and extends in the right-to-left direction, locking parts 46, 46 provided on right and left ends of the connection member 41, and locked parts 47A, 47B which are provided on the right and left holding members 11, respectively, and engaged with the locking parts 46, 46 when the wheels 13 for track travel are located at the expanded positions. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a track-and-rail vehicle configured to be able to travel on roads and tracks.

  Conventionally, based on a truck vehicle having road traveling wheels (hereinafter also referred to as wheels) on the front, rear, left and right of the vehicle body, track traveling wheels (hereinafter also referred to as iron wheels) are provided on the front, rear, and left and right sides of the vehicle body. In addition, a track-and-rail vehicle configured to be able to travel on a track is known (see, for example, Patent Document 1). An iron wheel of a track-rail vehicle is swung upward when traveling on a road and is stored in a lower position of the vehicle body in a retracted position above the wheel, and is swung downward and positioned at an overhanging position when traveling on a track. Placed on top.

  In a railroad vehicle, when the rotation center of the left and right iron wheels is connected by a shaft member to support the left and right iron wheels as in the case of a railway vehicle, when the iron wheel is positioned at the retracted position, the shaft member There is a possibility of interfering with the components of the truck vehicle such as the engine disposed in the lower part of the vehicle. For this reason, each iron wheel is held by a holding member that is swingably attached to the front, rear, left, and right of the vehicle body, and both ends of the support shaft of the iron wheel are rotatably supported by each holding member.

  In addition, various values, such as a standard gauge and a narrow gauge, are set as the distance (henceforth a gauge) between two rails which comprise a track. For this reason, the holding member is provided so as to be movable to the left and right with respect to the vehicle body, and the track running is configured with a gauge switching device that switches the distance between the left and right iron wheels (hereinafter also referred to as the wheel distance of the iron wheels) according to the gauge. Vehicles have been proposed, thereby improving the versatility of track-rail vehicles.

Japanese Patent Laid-Open No. 11-11310

  In general, the track traveling device is not provided with a steering device, and a track-and-rail vehicle traveling on the track always tries to travel straight in the vehicle length direction regardless of the direction in which the track extends. Therefore, as shown in FIG. 5, when the track-running vehicle 1 travels in a curved line on the track, there is a deviation between the direction in which the vehicle 1 indicated by the alternate long and short dash line A tries to travel and the direction in which the track indicated by the alternate long and short dash line B extends. Is generated (that is, an attack angle θ is generated), and an external force F is applied to the vehicle 1 to push it outward in the radial direction of the curve.

  Each iron wheel 13o, 13i is formed with a large-diameter flange portion 13b on the left and right inside with respect to a portion 13a where a tread surface abutting against the surface of the rail Ro, Ri is formed. The flange portion 13b of 13o is caught on the inner surface of the outer rail Ro. As a result, the vehicle 1 travels along the direction in which the track extends without derailing. In this way, the outer iron wheel 13o is pressed down by the rail Ro, whereas the inner iron wheel 13i receives a frictional force generated between the tread surface and the surface of the inner rail Ri and tries to continue traveling straight. For this reason, the inner iron ring 13i tends to move toward the radially outer side of the curve, causing the holding member 12i holding the inner iron ring 13i to bend. When the elastic force generated in the holding member 12i due to this bending exceeds the state of balancing with the frictional force, the bent holding member 12i is restored, and the inner iron ring 13i is moved radially inward of the curve.

  When the holding member 12i is restored, the vehicle 1 may be shaken, or the inner iron wheel 13i may be displaced laterally on the rail Ri to generate abnormal noise. . In the track-and-rail vehicle 1, it is difficult to suppress the movement of the inner iron wheel 13i by directly connecting the left and right iron wheels 13o and 13i with shaft members due to structural limitations as described above.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a track-and-rail vehicle that can suppress the bending of the holding member and eliminate problems that occur when traveling on a track. .

  To achieve this object, the present invention provides a vehicle body having road traveling wheels (for example, the wheel 3 in the embodiment) on the front, rear, left, and right, and a holding member that is swingable in the vertical direction on the front, rear, left, and right of the vehicle body. (For example, the iron wheel holding bracket 12 in the embodiment) and the track traveling device configured to have a track traveling wheel (for example, the iron wheel 13 in the embodiment) rotatably held by the holding member. By swinging the holding member upward, the orbital traveling wheel is positioned at the retracted position above the road traveling wheel, and the road traveling wheel can be used to travel on the road, and the holding member is swung downward. In a track-and-rail vehicle that is configured to be able to travel on the track using the orbital traveling wheel by placing the orbital traveling wheel on the track and fixed to the lower part of the vehicle body, Connecting part extending to (For example, the connecting bar 41 in the embodiment), the locking portions (for example, the locking pins 46 in the embodiment) provided at the left and right ends of the connecting member, and the holding member provided with the track running wheels. It has a to-be-latched part (for example, cylindrical members 47A and 47B in the embodiment) that engages with the latching part when it is located at the extended position.

  In addition, the track traveling device is configured to include a gauge switching device that changes the wheel distance of the track traveling wheel by moving the holding member to the left and right with respect to the vehicle body, and each of the left and right holding members has a plurality of covered members. It is preferable that the locking portion is provided apart from the left and right. The track traveling device is configured to include a gauge switching device that changes the wheel distance of the track traveling wheel by moving the holding member to the left and right with respect to the vehicle body. The locking portion may be provided separately on the left and right.

  In the track-and-rail vehicle according to the present invention, the holding member and the connecting member are locked during track running, and the left and right holding members are connected via the connecting member extending in the left and right directions and are supported to the left and right. As a result, even when the track running wheel on the inside of the curve is moved outward while traveling along the track, the holding member is supported and the bending is suppressed, so that the holding member bends. It is possible to eliminate the problems caused by.

  In addition, when configured to have a gauge switching device that moves the holding member to the left and right to change the wheel distance of the track traveling wheel, the left and right holding members are separated from each other by a plurality of locked portions. Accordingly, even if the holding member is moved to the left or right according to the gauge, any one of the plurality of locked portions can be engaged with the locking portion. Further, even if a plurality of locking portions are provided at the left and right end portions of the connecting member apart from each other in the left and right directions, the locked portion can be engaged with any of the plurality of locking portions in the same manner. become. Therefore, the bending of the holding member can be suppressed regardless of the wheel distance of the track traveling wheel.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a roadway working vehicle 1 as an example of a roadway running vehicle according to the present invention. In the following, the direction indicated by the arrow L in the figure will be described as the left, the vehicle width direction will be described as the left-right direction, and the direction indicated by the arrow F in the figure will be described as the front, and the vehicle length direction will be described as the front-back direction. This track-and-rail work vehicle 1 is based on a truck vehicle having a driving cabin 2a for performing a traveling operation on the front side of the vehicle body 2 and having wheels 3 for traveling on the road D on the front, rear, left and right of the vehicle body 2. The track traveling device 10 is configured to travel on the track on the front, rear, left, and right sides of the vehicle body 2. The track is composed of two parallel rails R.

  A turntable 4 that lifts and supports the vehicle body 2 is provided at the lower center of the vehicle body 2 so as to be vertically extendable. The turntable 4 is provided with a turning mechanism (not shown) for horizontally turning the vehicle body 2 in a lifted state. At the upper part of the vehicle body 2, there is provided an aerial work device 5 for carrying out railway work at a high place on the track such as a trolley wire replacement work and an inspection work. The aerial work device 5 includes a swivel base 5a provided on the vehicle body 2 so as to be horizontally swivelable, a boom 5b that is configured to be extendable and retractable and attached to the swivel base 5a, and a tip of the boom 5b. And the actuator (not shown) for driving the swivel base 5a and the boom 5b.

  2 and 4 show the track traveling device 10 on the left front side, and FIG. 3 shows the track traveling device 10 on the front left and right, each of the track traveling devices 10 on the front, rear, left and right is a frame 2b attached to the vehicle body 2. A pair of left and right support plates 11, 11 disposed in the lower part, and an iron wheel holding bracket that is pivoted between the left and right support plates 11, 11 so as to swing up and down and back and forth with respect to the vehicle body 2. 12, a steel wheel 13 configured to be rotatable around a support shaft 17 held by the steel wheel holding bracket 12 and extending to the left and right, and a cylinder mounting bracket 18 provided with a head portion 14a on the support plate 11 side. The rod portion 14b is pivotally connected to the iron wheel holding bracket 12, and has a lifting cylinder 14 that swings the iron wheel holding bracket 12 up and down and back and forth. In this way, each iron wheel 13 is provided to be swingable up and down and back and forth with respect to the vehicle body 2 via the support plate 11 and the iron wheel holding bracket 12. In the front left and right track traveling apparatuses 10, an iron wheel motor 15 that is attached to the left and right outer ends of the support shaft 17 of the iron wheel 13 and rotationally drives the iron wheel 13, and the left and right inner ends of the support shaft 17 of the iron wheel 13. And an iron wheel brake 16 that brakes the iron wheel 13.

  The iron wheel holding bracket 12 includes left and right side wall parts 12a and 12b, an upper wall part 12c that connects the upper edges of the left and right side wall parts 12a and 12b, and a front wall part 12d that connects the front edges of the left and right side wall parts 12a and 12b. And rear wall portions 12e that connect the rear edges of the left and right side wall portions 12a, 12b. The iron wheel 13 includes a disc-shaped tread surface forming portion 13a placed on the surface of the rail R, and a flange portion 13b that is located on the left and right inner sides with respect to the tread surface forming portion 13a and has a larger diameter than the tread surface forming portion 13a. Have. The support shaft 17 of the iron wheel 13 is rotatably supported by bearings (not shown) provided on the left and right side wall portions 12 a and 12 b of the iron wheel holding bracket 12. These bearings are held by bearing holders (not shown) fastened to the side wall portions 12 a and 12 b of the iron wheel holding bracket 12.

  The support plate 11 is provided so as to be movable to the left and right with respect to the frame 2b. Each track traveling device 10 includes a gauge switching device 20 that changes the distance (wheel distance) between the left and right iron wheels 13 by moving the support plate 11 left and right and moving the iron wheel holding bracket 12 left and right. Has been. As shown in FIGS. 2 and 3, the gauge switching device 20 includes a guide portion 21 that guides the horizontal movement of the support plate 11, a gauge switching cylinder 25 that moves the support plate 11 to the left and right, and a predetermined right and left of the support plate 11. And a lock portion 26 that is fixed at the moving position. In FIG. 3, in order to clearly show the configuration and operation of the gauge switching device 20, a cross section is shown as appropriate for some constituent members such as the guide portion 21.

  The guide portion 21 includes a flat guide plate 22 that is fixed to the lower portion of the frame 2b so as to extend left and right, and a slider 23 that is fixed to the upper portion of the support plate 11 and sandwiches the front and rear edges of the guide plate 22. The slider 23 is slidable left and right along the front and rear edges of the guide plate 22. The gauge switching cylinder 25 has one end fixed to the frame 2 b and the other end fixed to the slider 23.

  The lock portion 26 includes a lock pin 27 that is rotatably and vertically movable inside a cylindrical pin holder 29 attached to the left and right outer ends of the lower surface of the slider 23. Using the lever 28 attached to the lower end, the lock pin 27 is rotated and moved up and down. A biasing member (not shown) that biases the lock pin 27 upward is disposed inside the pin holder 29, and the lock pin 27 moved downward using the lever 28 resists the biasing force of the biasing member. Thus, a fixing mechanism (not shown) for fixing is provided. Further, the guide plate 22 is formed with a first lock hole 22a and a second lock hole 22b that are vertically penetrated and are spaced apart from each other. The first lock hole 22a is disposed on the left and right outer sides with respect to the second lock hole 22b.

  Since the gauge switching device 20 is configured in this way, when the slider 23 is slid left and right, the support frame 11, the iron wheel holding bracket 12, the iron wheel 13 and the lifting cylinder 14 are moved to the left and right. In addition, since it is the structure similar to the form shown in FIG.2, FIG.3 also about the track switching apparatus provided in the back and left track running apparatus 10, duplication description is abbreviate | omitted.

  Further, the work table 5c is provided with an upper operation device 6 for operating the actuator, the iron wheel motor 15 and the iron wheel brake 16 of the aerial work device 5, and at the rear end of the vehicle body 2, a rolling device is provided. A lower operating device 7 is provided for operating the chassis 4, the lifting cylinder 14, and the gauge switching cylinder 25.

  Further, the railroad work vehicle 1 is provided with a structure for supporting the left and right iron wheel holding brackets 12 to the left and right. Hereinafter, only the support structure for the front left and right iron wheel holding brackets 12 will be described with reference to FIGS. 2 to 4, but the support structure for the rear left and right iron wheel holding brackets 12 has the same configuration, and is redundantly described. Is omitted. This support structure includes a connecting bar 41 fixed to the lower portion of the vehicle body 2 and extending left and right, and a locking mechanism 45 for locking the iron wheel holding bracket 12 to the connecting bar 41. The stop mechanism 45 includes a locking pin 46 provided on the connecting bar 41 and cylindrical members 47 </ b> A and 47 </ b> B provided on the iron wheel holding bracket 12. As shown in FIG. 3, at the front lower portion of the vehicle body 2, a casing 50 for an engine or a transmission is disposed as a structure of a truck vehicle at the left and right central portion.

  Two bar mounting brackets 42, 42 that are fixed to the vehicle body 2 and extend downward so as to cover the left and right side surfaces of the casing 50 are provided at the lower portion of the vehicle body 2. The connecting bar 41 is provided so as to penetrate the bar mounting brackets 42, 42 to the left and right, and both left and right end portions 41 a, 41 b are positioned in front of the iron wheel holding bracket 12 of the track traveling device 10. At both left and right ends 41a and 41b, substantially cylindrical locking pins 46 and 46 are provided so as to protrude downward and obliquely rearward. The connecting bar 41 is bent at the left and right inner sides of the both bar mounting brackets 42, 42, and the left and right central portions 41c are disposed so as to extend to the left and right below the both end portions 41a, 41b. Thereby, the left and right center portion 41c of the connecting bar 41 is provided along the lower surface of the casing 50, and interference with the components of the truck vehicle is avoided, and the connecting bar 42 is connected to the bar mounting brackets 42, 42. Since it is prevented from coming off, the left and right positions of the connecting bar 41 are stabilized. Although not shown, an exhaust pipe extending from the engine, a spare wheel, and the like are disposed as a structure of the truck vehicle at the left and right central portions also at the rear lower portion of the vehicle body 2. For this reason, also in the support structure provided in the left and right track running devices, the left and right central portions of the connecting bar are bent downward, and interference between the connecting bar and the structure of these truck vehicles is avoided. .

  A locking bracket 49 is coupled to the left and right inner side wall portions 12b of the iron wheel holding bracket 12 so as to extend in the left and right sides. The first cylindrical member 47A is welded to the locking bracket 49 with its axis obliquely upward and forward. Similarly, the second cylindrical member 47B is welded to the front wall portion 12d of the iron wheel holding bracket 12 in the same manner with the axis obliquely upward and forward. The first and second cylindrical members 47A and 47B are arranged so as to overlap in a side view, and the left and right sides of the first and second boss holes 48a and 48b formed inside the cylindrical members 47A and 47B. The interval is set equal to the arrangement interval of the first and second lock holes 22a and 22b.

  Now, when the track-and-rail work vehicle 1 having the above configuration travels on the road D, as shown by a two-dot chain line in FIG. 1, the elevating cylinder 14 is reduced and the iron wheel holding bracket 12 is swung upward and rearward. The iron wheel 13 is moved to a storage position above the wheel 3 and stored in the lower part of the vehicle body 2. As a result, the wheel 3 is grounded on the road surface while the iron wheel 13 is separated from the road surface on the road D, and the wheel 3 is rotationally driven by the engine by the operation in the driving cabin 2a. Will be able to travel.

  When moving the railroad work vehicle 1 from the road D onto the track, first, the vehicle crosses the track within the railroad crossing, extends the turntable 4 and lifts the vehicle body 2 to perform the wheel 3 grounding, The vehicle body 2 is horizontally turned so that the vehicle length direction is along the direction in which the track extends, and the lifting cylinder 14 is extended by a predetermined operating amount to stop the swinging between the retracted position and the extended position. Check whether or not the distance between the two rails R, R constituting the track over which the distance spans (ie, the gauge G) is set. If the wheel distance does not match the gauge G, the gauge is switched. The wheel width of the iron wheel 13 is changed in accordance with the gauge using the device 20.

  Here, FIG. 3 shows a state in which the wheelway of the iron wheel 13 is set in accordance with the standard gauge G1 on the left side with respect to the left-right center line, and the track-and-rail work vehicle 1 is traveling on the standard track. On the right side, a state in which the wheelway of the iron wheel 13 is set in accordance with a narrow gauge G2 narrower than the standard gauge G1 and the track-and-rail work vehicle 1 is traveling on a narrow track is shown.

  As shown on the left side of FIG. 3, when the gauge is the standard gauge G1, first, the lever 28 is grasped and the lock pin 27 is moved downward to rotate the lock pin 29 around the axis by a predetermined angle. Thereby, the lock pin 27 is fixed in the state retracted into the pin holder 29 by the fixing mechanism. Next, the gauge switching cylinder 25 is extended, the slider 23 slides to the left and right with respect to the vehicle body 2, and the first lock hole 22a and the lock pin 27 are arranged coaxially. In this state, when the lever 28 is grasped and the lock pin 27 is rotated to the original position, the fixing by the fixing mechanism is released, the lock pin 27 is urged upward by the urging member, and the upper end of the lock pin 27 is pin holder. It protrudes upward from 29 and is inserted through the first lock hole 22a. Thereby, the left-right movement position of the support plate 11 etc. is fixed. By performing such an operation for each of the left and right track traveling apparatuses 10, the wheel distance of the iron wheel 13 is set to match the standard gauge G1. When the lock pin 27 is inserted through the first lock hole 22a, the locking pin 46 is opposed to the first cylindrical member 47A in the front-rear and up-down direction.

  When the distance of the iron wheel 13 is set in accordance with the standard gauge G1, the elevating cylinder 14 is extended again to swing the iron wheel holding bracket 12 downward and forward, and the iron wheel 13 is moved as shown by a solid line in FIG. It moves to a projecting position below the retracted position and projects downward with respect to the vehicle body 2. In the process of being moved to the overhang position, the lock pin 46 and the first cylindrical member 47A gradually approach each other, and the lock pin 46 enters the first boss hole 48a immediately before the iron wheel 13 is positioned at the overhang position. Inserted. As a result, when the iron wheel 13 is moved to the overhang position, the locking pin 46 and the first cylindrical member 47A are engaged, and the left and right iron wheel holding brackets 12 are connected via the connecting bar 41 to the left and right. Supported.

  In this way, when the center jack 4 is reduced in a state where the iron wheel 13 is located at the extended position, the tread surface forming portion 13a of the iron wheel 13 is placed on the rail R1 of the standard track and the wheel 3 is grounded. The vehicle body 2 is supported as it is. As a result, the upper operation device 6 is used to operate the iron wheel motor 15 to rotationally drive the iron wheel 13 so that it can travel on the standard track.

  On the other hand, as shown on the right side of FIG. 3, when the gauge is a narrow gauge G2, first, as in the case of the standard gauge G1, the lock pin 27 is fixed in the retracted state, and the gauge switching cylinder 25 is fixed. Is reduced, the iron wheel holding bracket 12 is slid inwardly with respect to the vehicle body 2, and the second lock hole 22b and the lock pin 27 are arranged coaxially. Then, the lock pin 27 is biased upward, and the upper end portion of the lock pin 27 is inserted into the second lock hole 22b, so that the left and right movement positions of the support plate 11 and the like are fixed. By performing this operation for each of the left and right track traveling devices 10, the wheel distance of the iron wheel 13 is set to match the narrow gauge G2. When the lock pin 27 is inserted through the second lock hole 22b, the locking pin 46 is opposed to the second cylindrical member 47B in the front-rear and up-down direction.

  When the wheel width of the iron wheel 13 is set in accordance with the narrow gauge G1, the elevating cylinder 14 is extended again, the iron wheel holding bracket 12 is swung downward and forward, the iron wheel 13 is moved to the extended position, and the vehicle body 2 Projecting downward. In the process of moving to this overhang position, the locking pin 46 and the second cylindrical member 47B gradually approach each other, and the locking pin 46 is inserted through the second boss hole 48b. When the iron wheel 13 is located at the overhang position, the locking pin 46 and the second cylindrical member 47B are engaged, and the left and right iron wheel holding brackets 12 are connected via the connecting bar 41 and supported to the left and right.

  When the center jack 4 is reduced and moved while the iron wheel 13 is located at the overhanging position in this way, the tread surface forming portion 13a of the iron wheel 13 is placed on the rail R2 and the wheel 3 remains grounded. The vehicle body 2 is supported. Thereby, it can drive | work on a narrow track | orbit by operating the iron wheel motor 15 using the upper operation device 6, and rotationally driving the iron wheel 13. FIG.

  As described above, the track-and-rail work vehicle 1 can change the wheel distance of the iron wheel 13 in two steps using the gauge switching device 20, and can travel on the track corresponding to the difference between the gauges. it can. Then, the operator who has boarded the work table 5c desires the work table 5c by operating the actuator of the aerial work device 5 using the upper operation device 6 to drive the swivel table 5a and the boom 5b. It can be moved to the work position and railway work can be performed.

  When moving from the track to the road D, the vehicle stops at the intersection with the road D within the railroad crossing, and the vehicle body 2 is lifted by the center jack 4 so that each iron wheel 13 is separated from the rail R. And the lifting cylinder 14 is reduced, and the iron wheel holding bracket 12 is swung upward and rearward. As a result, each iron wheel 13 moves from the extended position to the retracted position, but during that time, the locking pin 46 is removed from the locking holes 48a and 48b, and the state where the iron wheel holding bracket 12 is locked to the connecting bar 41 is released. Is done. Then, the center jack 4 is contracted and the wheel 3 is grounded to the road surface within the railroad crossing, while the iron wheel 13 is stored in the lower part of the vehicle body 2 and supported by the vehicle body 2 in a state separated from the road surface. Thereby, the track-and-rail work vehicle 1 can travel on the road D again.

  As described above, according to the track-and-rail work vehicle 1 of the present configuration example, when the iron wheel 13 is moved to the overhanging position and travels on the track, the left and right iron wheel holding brackets 12 and 12 are connected via the connecting bar 41. They are supported from side to side. For this reason, as shown in FIG. 5, the track-and-rail work vehicle 1 travels in a curved line on the track, and the iron wheel 13 i on the inner side of the curve receives frictional force with the rail Ri and tries to continue the straight traveling on the iron wheel holding bracket 12 i. Even if a force to deform is applied, the force is received by the connecting bar 41 and the iron ring holding bracket 12o outside the curve connected via the connecting bar 41, so that the bending deformation of the iron ring holding bracket 12i inside the curve can be suppressed. . Therefore, the occurrence of the vehicle shake or abnormal noise that may occur when the iron wheel holding bracket 12 is restored from the bent state is reduced, and the inconvenience when the track work vehicle 1 travels on the track can be solved. it can.

  The track traveling device 10 of the present configuration example includes a gauge switching device 20 that moves the left and right iron wheel holding brackets 12 to the left and right, respectively, and changes the wheel distance of the iron wheel 13 in two stages. be able to. Two cylindrical members 47A and 47B are provided side by side on each of the left and right iron wheel holding brackets 12, and boss holes 48a and 48b that can engage with the locking pins 46 are formed in the respective cylindrical members 47A and 47B. . Thereby, even if the iron wheel holding bracket 12 is moved to the left and right, the locking pin 46 provided on the connecting bar 41 fixed to the vehicle body 2 side is engaged with one of the boss holes 48a and 48b, and the gauge switching device 20 is engaged. Thus, no matter how the wheel distance of the iron wheel 13 is set, the occurrence of bending of the iron wheel holding bracket 12 can be suppressed.

  Further, when the elevating cylinder 14 is extended to move from the road D to the track to move the iron wheel 13 to the extended position, the iron wheel holding bracket 12 is automatically locked to the connecting bar 41 by the locking mechanism 45. Is done. On the contrary, when the raising / lowering cylinder 14 is reduced and moved to the retracted position in order to move from the track to the road D, the locked state is automatically released. As described above, when the operation necessary for moving on the track is performed, the left and right iron ring holding brackets 12 and 12 are surely supported with each other, and the bending of the iron ring holding bracket 12 is performed without increasing the burden on the operator. It is possible to provide the track-and-rail work vehicle 1 that suppresses the occurrence of the occurrence of the problem. Further, in automating the locking operation and the releasing operation by the locking mechanism 45 as described above, a dedicated actuator is not required, and an increase in cost and an increase in the size of the structure around the track traveling device 10 can be suppressed.

  So far, the embodiment of the track running vehicle according to the present invention has been described, but the scope of the present invention is not necessarily limited to the above configuration. In the above configuration example, the wheel width of the iron wheel is configured to be changeable in two stages, and two locking holes that are engaged with the locking pins are provided in accordance with this. A distance switching device that can change the distance may be provided, and in that case, by arranging a plurality of cylindrical members on each of the left and right iron wheel holding brackets in accordance with the settable number of wheel distances, Similar effects can be obtained.

  Further, a pin may be provided on the iron wheel holding bracket side, and a cylindrical member having boss holes at both ends of the connecting bar may be provided. That is, in this configuration, the pin on the iron wheel holding bracket side corresponds to the locked portion in the claims, and the cylindrical member on the connecting bar side corresponds to the locking portion in the claims. At this time, for a track-and-rail vehicle having a gauge switching device, by providing a plurality of pins side by side, it is possible to suppress bending of the iron wheel holding bracket regardless of the wheel distance.

  Further, in the above configuration example configured by providing the gauge switching device, a plurality of cylindrical members are provided. However, one cylindrical member is provided in the iron wheel holding bracket, and a plurality of locking members are provided at both ends of the connecting bar. It is good also as a structure which provides a pin away from right and left. At this time, when the wheel distance is set for standard gauge travel by the gauge switching device, the outer locking pin is made to face the cylindrical member, and when the wheel distance is set for narrow gauge travel, the inner distance is set. By disposing the locking pin so as to face the cylindrical member, the same effect as the above configuration example can be obtained. Further, the same effect can be obtained by providing one pin on the iron wheel holding bracket side and providing a plurality of cylindrical members separately on the left and right sides of the both ends of the connecting bar.

  Further, as a mechanism for locking the left and right iron wheel holding brackets and the connecting bar, a mechanism having a pin and a hole that is locked to the pin is shown. This is an example of the mechanism. However, it is not limited to this configuration. Moreover, although the track-and-rail work vehicle 1 in which the aerial work device 5 is mounted is illustrated as the track-and-rail vehicle, the front and rear, left and right iron wheels are rotatably held by the iron wheel holding bracket provided to swing up and down with respect to the vehicle body. If it is a vehicle which has the track traveling apparatus of the structure comprised, it will not be restricted to said track-and-rail work vehicle, The same effect can be acquired by applying this invention similarly.

1 is a left side view of a track work vehicle shown as an example of a track running vehicle according to the present invention. It is a left view of the track running device of the front left side. It is a back sectional view of a front and right track running device. It is a perspective view of the track running device of the front left side. (a) is a top view which shows the curve part of a track | orbit, (b) is a rear view of the track driving vehicle (railway work vehicle) which carries out the curve driving | running | working on a track | orbit.

Explanation of symbols

R Rail G Gauge 1 Railroad work vehicle (railway running vehicle)
2 Body 3 Wheel (Wheel for road driving)
10 Track Running Device 12 Iron Wheel Holding Bracket (Holding Member)
13 Iron Wheel (Railway Wheel)
20 gauge switching device 41 connecting bar (connecting member)
45 Locking mechanism 46 Locking pin (locking part)
47A, 47B First and second cylindrical members (locked portions)
48a, 48b first and second boss holes

Claims (3)

A vehicle body with wheels for road traveling on the front, rear, left and right;
A holding member provided swingably in the vertical direction on the front, rear, left and right sides of the vehicle body, and a track running device configured to have a track running wheel rotatably held by the holding member,
The holding member is swung upward to position the orbital running wheel in a retracted position above the road running wheel, and the road running wheel can be used to travel on the road, and the holding member is In an orbital running vehicle configured to be able to run on a track using the orbital running wheel, positioned in an overhanging position by swinging downward and placing the orbital running wheel on the orbit,
A connecting member fixed to the lower part of the vehicle body and extending to the left and right;
Locking portions provided at both left and right ends of the connecting member;
A locking portion that is provided on the holding member and engages with the locking portion when the orbital running wheel is positioned at the extended position. Railroad vehicle. The track traveling device is configured to include a gauge switching device that changes the wheel distance of the track traveling wheel by moving the holding member to the left and right with respect to the vehicle body,
The track-running vehicle according to claim 1, wherein the left and right holding members are provided with a plurality of the locked portions that are separated from each other in the left-right direction. The track traveling device is configured to include a gauge switching device that changes the wheel distance of the track traveling wheel by moving the holding member to the left and right with respect to the vehicle body,
The track-and-rail traveling vehicle according to claim 1, wherein a plurality of the locking portions are provided to the left and right ends of the connecting member so as to be separated from each other in the left-right direction.

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