JP2014101194A - Crane for being mounted on track/land vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crane for being mounted on a track/land vehicle, which can secure safety of work on a rail track while maintaining convenience of an on-vehicle crane.SOLUTION: In a crane 1 for being mounted on a track/land vehicle, a column post 4 has a post expansion mechanism capable of being vertically expanded and contracted on a slewing machine base 19, and a telescopic boom 5 makes a boom hoisting cylinder 90 of a boom hoisting mechanism and a column expansion cylinder 43 of the post expansion mechanism operate in a switching manner.

Description

  The present invention relates to a crane for mounting on a railroad vehicle that is mounted on a railroad vehicle.

  A track-and-rail vehicle is a special vehicle that can travel on railroad tracks by adding iron wheels and a turntable to the vehicle that can travel on the road. By the way, in the crane work on the track, the height from the track to the overhead line is 4.5 m, so the limit height at the time of the work is regulated to 4.0 m. Therefore, it is necessary to observe this restricted height (4.0 m) also in the crane work with the crane for mounting on a rail vehicle.

  By the way, a general crane is provided with a column post installed on a swivel base and a telescopic boom installed at the front end of the column post so that it can be raised and lowered, and by a hook provided at the front end of the telescopic boom. Lifting a suspended load as high as possible is one of the performances and is characterized (for example, see Patent Documents 1 and 2). However, its features and performance conflict with the work in the crane head that is required in the overhead line of the above-mentioned track, and an electric shock may occur if the telescopic boom touches the overhead line beyond the limit height. become.

  Therefore, conventionally, by attaching a height limiter by electric control to a general vehicle-mounted crane, the height of the telescopic boom when it is raised and lowered does not exceed the limit height. The height (boom undulation angle) was controlled within the limit height (see, for example, Patent Document 3).

Japanese Patent Laid-Open No. 4-7294 JP-A-11-171474 JP 2000-335889 A

  However, since the height restriction device described in Patent Document 3 electrically controls the undulation height of the telescopic boom, the operator on the site dislikes that the work efficiency drops in the work on the actual track. The height restriction device can be released and used. In this case, if the telescopic boom mistakenly exceeds the limit height and the overhead wire comes into contact with the telescopic boom, a power failure (electric shock accident) will occur. In addition, if the overhead line is cut, it may cause a serious delay in the next day's train schedule. Thus, since the conventional height limiting device in a crane is based on electrical control, there is a risk that the limitation may be canceled by the judgment of the worker on site. In addition, there is a risk of starting the work without forgetting to set the height limit.

On the other hand, if the crane for mounting a rail vehicle is used only for crane work on the railway track, a crane lift higher than the above-mentioned limit height is unnecessary. Therefore, it is also conceivable to use a crane-dedicated machine that is less than the above-mentioned restricted height, with the hoisting function itself of the telescopic boom not provided. However, with such a dedicated machine, the performance of a general crane that lifts the suspended load as high as possible by the hook provided at the tip of the telescopic boom is lost, so the convenience of a normal in-vehicle crane is impaired. There is a problem.
Therefore, the present invention has been made in view of the above-described problems, and while maintaining convenience as an in-vehicle crane, the work does not come into contact with the overhead wire in the work on the track, and safety is ensured. It is an object of the present invention to provide a crane for mounting a railroad vehicle that can be secured.

  In order to solve the above-described problem, a crane for mounting an orbital vehicle according to an aspect of the present invention is a crane for mounting an orbital vehicle mounted on an orbital vehicle having an iron wheel that can be placed on a railroad track. A base having an outrigger, a column post installed on a swivel base on the base, a telescopic boom pivotally supported by a pin at an upper end of the column post, and the pin with respect to the column post A boom hoisting mechanism for raising and lowering the telescopic boom, the column post having a column post telescopic mechanism capable of telescopic expansion / contraction on the swivel base, and the telescopic boom is formed by the boom hoisting mechanism. A boom raising / lowering operation and a column post expansion / contraction operation by a column post expansion / contraction mechanism of the column post are switched and operated.

  According to the railway vehicle mounted crane according to one aspect of the present invention, the column post has the column post expansion / contraction mechanism that can extend and contract in the vertical direction on the swivel base, and the expansion / contraction boom is operated by the boom hoisting operation by the boom hoisting mechanism. However, when the column post telescopic mechanism is enabled, the boom hoisting mechanism is disabled, and the boom hoisting mechanism is activated. When enabled, the column post telescopic mechanism is disabled. Therefore, it is possible to perform the crane work so as not to exceed the limit height by keeping the boom raising / lowering mechanism inoperable on the track and managing the posture of the telescopic boom constant by the operation of the column post expansion / contraction mechanism. Further, at a place other than on the track, it is possible to exhibit the same performance as a general crane by raising and lowering the telescopic boom by making the boom hoisting mechanism operable while making the column post telescopic mechanism inoperable. Therefore, it is possible to ensure the safety of the work on the track while maintaining the convenience as the on-board crane.

  Here, the column post structure of the crane for mounting a rail vehicle according to one aspect of the present invention is a column in which a plurality of cylindrical casings are nested in the vertical direction, and a plurality of casings are provided on the back of the column posts. It is preferable that the telescopic cylinder is connected so as to be slidable in the vertical direction. With such a configuration, the column post is suitable for a configuration in which the column post is installed so as to be extendable in the vertical direction on the swivel base.

  Moreover, in the crane for rail vehicle mounting according to an aspect of the present invention, the crane includes a detecting unit that detects a deployed state and a retracted state of the iron wheel, and the switching between the boom hoisting mechanism and the column post extending and retracting mechanism is performed as described above. Based on the detection state of the detection means, it is performed in conjunction with the deployment and storage of the iron wheel. When the iron wheel is in the unfolded state, the boom hoisting mechanism is disabled and the column post telescopic mechanism is activated. When the iron wheel is in the retracted state, it is preferable that the boom hoisting mechanism is operable and the column post expansion / contraction mechanism is inoperable. Such a configuration is suitable for switching the operation of the boom hoisting mechanism and the column post expansion / contraction mechanism by a mechanical structure, and reliably distinguishing between work on the track and work other than on the track. Therefore, it is more suitable for ensuring the safety of the work on the track while maintaining the convenience as the in-vehicle crane.

  In addition, it is preferable that the detection means is constituted by an electrical detection switch such as a limit switch or a proximity switch that detects a deployed state and a retracted state of the iron wheel. Further, the detection means can be shared with a track work switch that switches between a deployed posture and a retracted posture of the iron wheel when operated by an operator.

  Further, in the rail vehicle mounted crane according to one aspect of the present invention, the telescopic boom is composed of a plurality of booms, and becomes a thicker boom as the proximal end side boom becomes narrower and a distal end boom. It is preferable to have a trolley device which is a telescoping type that is the outermost frame and is movable along the boom longitudinal direction at the lower portion of the tip boom. With such a configuration, while having the convenience of a normal on-board crane, it is more suitable for securing so-called workability near the crane center axis when used as a crane for mounting on a rail vehicle. .

  Moreover, in the crane for mounting on a railroad vehicle according to one aspect of the present invention, when the railroad vehicle performs a work in a curve section of a railway, the crane main body may be leveled while the iron wheels are installed on the track. It is preferable to further include a cant correction device. The cant correction device is supported by a support bracket fixed on a chassis frame between a driver's cab and a loading platform of the rail vehicle, and is pivotally supported by the support bracket so as to be tiltable left and right with a support shaft in the front-rear direction. To adjust the inclination angle of the crane mount relative to the rail vehicle between the crane mount, the base mounted on the crane mount and having the outrigger, and the crane mount and the support bracket It is preferable to have one tilting cylinder attached as the tilting means. If it is such a configuration, the track curve is inclined toward the inside (cant), when the railroad vehicle works in the curve section, with the iron wheels installed on the track, The crane body can be leveled by correcting the inclination angle (cant angle).

  As described above, according to the present invention, safety can be ensured while keeping the convenience of the on-board crane and the boom does not contact the overhead wire in the work on the track.

1 is a left side view of an embodiment of a crane for mounting on a railroad vehicle according to an aspect of the present invention. FIG. 2 is a front view of FIG. 1, in which a cant angle correction state by a cant correction device is also illustrated. It is a block diagram explaining one Embodiment of the hydraulic circuit of the crane for track-and-vehicle vehicles concerning one mode of the present invention. It is a left side view (figure which shows a run state on a road) of one embodiment in the state where a crane for mounted on a railroad vehicle concerning one mode of the present invention was mounted in a railroad vehicle. It is a figure which shows the state which mounted the track-and-rail vehicle of FIG. 4 on the track of a railroad. FIG. 6 is a diagram showing a state in which the outrigger is grounded in the track-and-rail vehicle of FIG. FIG. 7 is a view showing a state in which the column post is extended by a post expansion / contraction mechanism in the rail car of FIG. 6. FIG. 8 is a diagram illustrating a state in which the trolley device is moved from the proximal end side of the telescopic boom to the distal end side along the boom longitudinal direction in the track-and-rail vehicle of FIG. 7. It is a figure which shows the state which extended the expansion-contraction boom from the state shown in FIG. It is a figure which shows the state which extended | stretched the telescopic boom further from the state shown in FIG. FIG. 5 is a diagram showing a state in which the outrigger is grounded in the track-and-rail vehicle of FIG. FIG. 12 is a diagram illustrating a state in which the telescopic boom is raised by a boom raising / lowering mechanism in the track-and-rail vehicle of FIG. 11. FIG. 13 is a diagram illustrating a state in which the trolley device is moved from the proximal end side of the telescopic boom to the distal end side along the boom longitudinal direction in the track-and-rail vehicle of FIG. 12. It is a figure which shows the state which extended the telescopic boom from the state shown in FIG. It is a figure which shows the state which extended | stretched the telescopic boom further from the state shown in FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.
As shown in FIG. 1 and FIG. 2, in this railcar mounted crane 1, a base 3 including an outrigger 2 is mounted and fixed on a crane mounting base 6. A swivel base 19 is provided on the base 3, and an extendable column post 4 is erected on the swivel base 19 so as to be turnable. A telescopic boom 5 is installed at the upper end of the column post 4 so that it can be raised and lowered by operating a boom raising and lowering mechanism. As shown in FIG. 1, the telescopic boom 5 is positioned so that the boom hoisting cylinder 90 of the boom hoisting mechanism is in a horizontal posture when shortened. The telescopic boom 5 is provided with a trolley device 20 that hangs down a hook 21 so as to be movable along the telescopic boom 5. As shown in FIG. 6, the ground contact position GL of the outrigger 2 is at a position lower than the railroad track R, and the crane 1 itself is supported by an iron wheel 14 that is projected downward by the operation of the railroad device. It rises from the ground to a higher position than the road running state (see FIG. 6). Therefore, the outrigger 2 that is used in, for example, a loader work crane is used as the outrigger 2 that has a longer stroke than usual.

  In addition, since the operator (operator) also operates the crane 1 from a low position on the side of the track, in the crane 1 for mounting on an orbital vehicle, the position of the operation lever of the crane 1 is installed at a position lower than usual. Thus, the operation lever can be easily reached. In other words, in a general crane, the operation lever is arranged on the base having the outrigger. If the operation lever is arranged on the base, the operation from the side of the track is not performed unless the hand is extended. The lever may be out of reach. Therefore, in this crane 1 for rail vehicle mounting, as shown in FIG. 1, a plurality of operation levers 31 are arranged on the side surface of the base 3 (in this example, the back side of the column post 4 (the side opposite to the telescopic boom 5 side)). The control lever 33 is connected to a control valve 33 for supplying and discharging pressure oil necessary for the actuator by a connecting rod 32. Thereby, compared with the case where the operation lever is arrange | positioned on the base 3, since the operation lever 31 is provided in the low position, the operativity from the track side is improving.

  In addition, as shown in FIG. 2, the crane 1 for mounting the track-and-rail vehicle has the iron wheel 14 on the track R when the track-and-rail vehicle 10 (see each side view in FIGS. 5 to 10) performs work in a curved section. A cant correction device is provided that can correct the inclination angle (cant angle) α and keep the crane body horizontal while being installed.

  That is, as shown in FIG. 2, the crane mounting base 6 is pivotally supported on the support bracket 7 so as to be tiltable left and right by a crane rotation shaft 8 that is a support shaft facing in the front-rear direction. In addition, as a tilting means for adjusting an inclination angle (cant angle) α (see FIG. 2) of the crane mounting base 6 with respect to the rail vehicle 10 (see FIG. 5) between the crane mounting base 6 and the support bracket 7. A tilting cylinder (cant correction cylinder) 9 is attached. And the support bracket 7 which supports the crane mounting base 6 is fixed on the chassis frame 13 between the cab 11 and the loading platform 12 of the track-and-rail vehicle 10, as shown in FIG. In order for the railway vehicle to resist centrifugal force, the curve of the track is inclined inward (cant). By extending and retracting the tilting cylinder 9, the crane 1 is moved as shown in FIG. The posture of the crane mounting base 6 can be adjusted so as to be level with the ground. As a result, the crane 1 for mounted on a railroad vehicle corrects the inclination angle (cant angle) α with the iron wheel 14 being installed on the track R when the railcar 10 performs work in a curve section, and the crane 1 The main body can be leveled.

  Here, the crane 1 for mounting a rail vehicle has a post telescopic mechanism in which the column post 4 can be expanded and contracted in the vertical direction on the swivel base 19, and the height of the telescopic boom 5 is increased by the expansion and contraction of the column post 4 itself. It is configured to be adjustable. At this time, the crane 1 for the rail vehicle mounting is configured such that the telescopic boom 5 is configured such that the boom hoisting cylinder 90 is operated by switching the column telescopic cylinder 43 of the post telescopic mechanism. Is maintained in a horizontal position.

  Specifically, as shown in FIGS. 1 and 5, the column post 4 has a plurality of cylindrical casings nested in the vertical direction. In this example, the column post 4 is composed of two upper and lower housings 41, 42, the lower housing 42 is fixed to the swivel base 19 on the base 3, and the upper housing is covered so as to cover the outside of the lower housing 42. The body 41 is fitted so as to be slidable along the axial direction of the lower housing 42 from the upper end side of the lower housing 42. The two casings 41 and 42 need to secure as many overlapping portions as possible of the upper and lower casings 41 and 42 in order to prevent the middle folding when the column post 4 is extended. Therefore, the lower housing 42 has a fitting structure that penetrates to the vicinity of the top plate of the upper housing 41 when the column post 4 is reduced. The two upper and lower housings 41 and 42 are connected to each other by a column telescopic cylinder 43 provided on the back surface of the column post 4 (the surface opposite to the telescopic boom 5 side). The upper casing 41 slides up and down along the lower casing 42.

  As shown in FIG. 7, the upper surface height H of the telescopic boom 5 when the column post 4 is fully extended is such that the boom hoisting cylinder 90 is in the column telescopic cylinder in a state where the railcar is placed on the railroad track R. It is set so that the telescopic boom 5 can be maintained in a horizontal posture and can be raised to the limit height (for example, 4 m) of the overhead line L by switching between 43 and 43. Then, after the height of the telescopic boom 5 is defined in a horizontal position by the expansion and contraction of the column post 4, the telescopic boom 5 is expanded and contracted by a horizontal expansion and contraction operation by a tele cylinder (not shown) as shown in FIGS. It is possible. In addition, on the side surface of the telescopic boom 5, an electromagnetic switching valve 61 (see FIG. 3) that switches between the telescopic operation of the hydraulic hose group and the telescopic boom 5 and the operation of the trolley device 20 is mounted.

  As shown in FIG. 1, the telescopic boom 5 is composed of a plurality of booms (in this example, three stages). The telescopic boom 5 of the present embodiment has a proximal boom 51 on the proximal end, with the proximal end pivotally supported on the upper housing 41 of the column post 4. The intermediate boom 52 is slidably installed along the axial direction of the proximal boom 51 so that the proximal boom 51 is inserted, and the distal boom 53 is inserted so that the intermediate boom 52 is inserted. Is installed so as to be slidable along the axial direction with respect to the intermediate boom 52.

  These booms 51, 52, and 53 are formed in a three-stage nesting shape that becomes a thicker boom at the tip. That is, among the booms 51, 52, and 53, the proximal boom 51 is thin, the intermediate boom 52 is thicker than the proximal boom 51, and the distal boom 53 is thicker than the intermediate boom 52. The booms 51, 52, and 53 can be expanded and contracted in the horizontal direction by driving a telecylinder (not shown), and the front end boom 53 is the outermost frame when contracted. Further, a boom hoisting mechanism for hoisting the entire telescopic boom 5 is configured by pivotally connecting the lower surface side of the base end boom 51 and the lower portion of the upper housing 41 by a boom hoisting cylinder (derrick cylinder) 90, and the boom hoisting mechanism is configured. By expanding and contracting the cylinder 90, the telescopic boom 5 can be raised and lowered with respect to the column post 4 with a boom mounting pin 55 provided at the upper part of the column post 4 as a rotation center.

  As shown in FIG. 1, the trolley device 20 has a traveling rail 24 directly attached along the lower surface of the tip boom 53, and a drive hydraulic motor 57 (see FIG. 2) is installed inside the tip of the boom. The drive sprocket 25 connected to the drive shaft of the hydraulic motor 57 is provided on the distal end side of the side surface of the distal end boom, and the drive chain 27 is bridged between the driven sprocket 26 and the drive sprocket 25 provided on the proximal end side. ing. The main body of the trolley device 20 is connected to a middle portion of the drive chain 27, and when the hydraulic motor 57 is driven, the trolley device 20 is pulled by the drive chain 27, along the traveling rail 24 on the lower surface of the tip boom 53. The trolley device 20 travels in the boom longitudinal direction. As a result, it is possible to hang the load on the hook 21 and move it to the front of the loading platform.

  The trolley device 20 itself includes only a sheave 58 (see FIG. 2) for hanging a wire rope around a hook, and does not include a winch device. The winch device 22 is provided on the upper portion of the upper housing 41 that is the movable side of the column post 4 that expands and contracts. Therefore, the mass of the device itself is made lighter by the amount of the winch device as compared with a device equipped with the winch device (for example, a telescopic boom with a trolley described in JP-A-5-97391). Therefore, since the mass of the winch device 22 is not added together with the suspended load at the time of the work, the overturning moment becomes advantageous by the mass, and the suspended load amount can be increased. In particular, since the moment per mass increases in proportion to the increase in the working radius, the higher the effect, the more pronounced the farther work.

  Here, the telescopic operation of the telescopic boom 5 and the operation of the trolley device 20 are the total length of the trolley device 20 in the boom longitudinal direction by operating one boom telescopic lever (one of the plurality of operation levers 31). It is possible to move across. Thereby, the suspended load can be transported from the position of the crane 1 to the tip of the boom at the time of extension by operation of only one boom telescopic lever.

  Specifically, as shown in the block diagram of the hydraulic circuit in FIG. 3, the hydraulic motor 57 for operating the trolley device 20 and the telecylinder 54 for extending and retracting the telescopic boom 5 use a control valve 33 to perform electromagnetic switching. The oil passages are connected in parallel via the valve 61. The hydraulic pump 70 that receives power from the PTO supplies pressure oil to the upper and lower control valves 33 and 72, and pressure oil necessary for driving is distributed from the upper and lower control valves 33 and 72 to each actuator. In this example, pressure oil is supplied from the control valve (lower) 72 to the tilting cylinder 9 for correcting the cant and the track device for taking in and out the iron wheel 14. Further, the control valve (upper) 33 supplies pressure oil necessary for the actuators (54, 57, 66 to 69) of the crane 1 main body.

  For switching the hydraulic oil to the two actuators 54 and 57 for the movement of the trolley device 20 and the expansion and contraction of the telescopic boom 5, one electromagnetic switching valve 61 is used as shown in FIG. The oil passage of the electromagnetic switching valve 61 is switched based on input signals from limit switches 81 and 82 (see FIG. 1) which are switching devices.

  When the operator operates the boom expansion / contraction operation lever 31 to the extension side, the pressure oil discharged from the control valve 33 flows into the electromagnetic switching valve 61. While the electromagnetic switching valve 61 is not energized (when the trolley device 20 has not moved to the tip of the boom), only the trolley device 20 is driven. The trolley device 20 that has moved to the tip of the boom hits the limit switch 81 at the tip of the boom, and the electromagnetic switching valve 61 starts energization. As a result, the oil passage is switched and the pressure oil flows to the telecylinder 54 side. When the telescopic boom 5 starts to extend due to the extension of the telecylinder 54, the base end portion of the intermediate boom 52 is also detached from the limit switch 82.

  Next, when the telescopic boom 5 is in the extended state and the boom extending / contracting operation lever 31 is operated to the reduction side, the telecylinder 54 starts to reduce. Since the electromagnetic switching valve 61 remains energized, the pressure oil discharged from the control valve 33 at this time flows only into the telecylinder 54 side. At the same time that the telescopic boom 5 is completely reduced, the base end portion of the intermediate boom 52 strikes a limit switch 82 provided at the base end position of the telescopic boom 5. Thus, when the electromagnetic switching valve 61 is de-energized, the oil path is switched to the hydraulic motor 57 side, and the trolley device 20 travels to the boom proximal end side.

Here, the crane 1 for mounting a railroad vehicle has a configuration in which a boom hoisting cylinder 90 for hoisting the telescopic boom 5 is operated by switching the column telescopic cylinder 43. As shown in FIGS. By switching the operation of the column telescopic cylinder 43 and the boom hoisting cylinder 90 exclusively at locations other than (track) (for example, on the road), the safety of work on the track is ensured while maintaining the convenience of the on-board crane. It can be done.
Specifically, as shown in the block diagram of the hydraulic circuit in FIG. 3, the column telescopic cylinder 43 and the boom hoisting cylinder 90 use one control valve 33, and the oil passages are arranged in parallel through one electromagnetic switching valve 62. Connected to.

  As shown in FIG. 5, the switch of the oil path to the column telescopic cylinder 43 and the boom hoisting cylinder 90 by the electromagnetic switching valve 62 is a limit switch for detecting the unfolded state and retracted state of the iron wheel 14 located on the rear side of the loading platform. 63 (see FIG. 5) is installed as a detecting means, and the oil path of the electromagnetic switching valve 62 is switched based on an input signal (ON / OFF) from the limit switch 63.

  That is, when the operator operates a track work switch (not shown) for switching between the deployed posture and the retracted posture of the iron wheel 14 to the deployed side of the iron wheel 14, the control valve (lower) 72 applies pressure oil to the track device side. By supplying, the iron wheel 14 located on the rear wheel side is brought into a developed state. As a result, the limit switch 63 is struck by abutting against the base of the iron wheel 14 located on the rear side of the loading platform in conjunction with the development of the iron wheel 14 (ON), and the input signal (ON) from the limit switch 63 Based on the above, the oil passage of the electromagnetic switching valve 62 is switched. At this time, if the iron wheel 14 is in the unfolded state, the pressure oil discharged from the control valve 33 flows to the column telescopic cylinder 43 side of the post telescopic mechanism, the boom hoisting cylinder 90 of the boom hoisting mechanism is disabled, and the column The telescopic cylinder 43 is operable.

  On the other hand, when the operator operates the track work switch to the storage side of the iron wheel 14, the control valve (lower) 72 stores the iron wheel 14 positioned on the rear wheel side by supplying pressure oil to the track device side. To. As a result, the limit switch 63 is brought into a non-contact state with the base of the iron wheel 14 in conjunction with the retracting of the iron wheel 14 (OFF), and the electromagnetic switching valve 62 is controlled based on the input signal (OFF) from the limit switch 63. The oil passage is switched. As a result, the pressure oil discharged from the control valve 33 flows to the boom hoisting cylinder 90 side, the boom hoisting cylinder 90 is operable, and the column telescopic cylinder 43 is inoperable.

Next, the operation, action, and effect of the crane 1 for mounting a rail vehicle will be described.
First, the operation of the vehicle-mounted crane 1 on the track (track) will be described.
As shown in FIG. 4, when the vehicle 1 is traveling normally, the railcar mounted crane 1 stores the outrigger 2 above the bottom surface of the crane, and the iron wheels 14 are also stored. On the other hand, in running on the track R, the track device is operated and, as shown in FIG. 5, the steel wheels 14 before and after the vehicle are placed on the track R in an unfolded state. Can drive. Then, at the time of crane work on the railroad track R, as shown in FIG. 6, the outrigger 2 is projected downward to be grounded.

  Here, the vehicle-mounted crane 1 regulates the operation of the boom hoisting cylinder 90 on the track R so as not to exceed the limit height 4 m for preventing overhead wire contact, and the column telescopic cylinder 43 and the trolley. The device 20 ensures the workability of the crane. That is, as described above, since the oil passage of the electromagnetic switching valve 62 connected in parallel is switched based on the input signal (ON / OFF) from the limit switch 63, the column telescopic cylinder 43 and the boom hoisting cylinder 90 are connected. Switch and operate. Since the iron wheel 14 is always in the deployed position on the track, an input signal (ON) is input from the limit switch 63, and the oil path of the electromagnetic switching valve 62 is switched accordingly, and the boom hoisting cylinder 90 is switched. Is disabled, and the column telescopic cylinder 43 is enabled.

  Thereby, since the raising / lowering operation | movement of the telescopic boom 5 is prevented reliably, the safety | security of the operation | work on a track | line can be ensured. Thereafter, as shown in FIGS. 7 to 10, the column post 4 is expanded and contracted, the trolley device 20 is moved along the tip boom 53, and the telescopic boom 5 is expanded and contracted so that the crane does not exceed the limit height for preventing contact with the overhead wire. Can be used in a range.

  Specifically, after the outrigger is grounded, as shown in FIG. 7, the column post 4 is extended by the column telescopic cylinder 43 to adjust the height H of the telescopic boom 5 up to a limit of 4 m on the track. To do. At this time, according to the vehicle-mounted crane 1, since the operation of the boom hoisting cylinder 90 is restricted so that the telescopic boom 5 cannot be raised and lowered, the telescopic boom 5 does not exceed the overhead wire limit height. As shown in FIG. 8, even when the overhead line height is restricted, the workability of the load carrying work in the cargo bed 12 is ensured by the sliding movement of the trolley device 20.

  That is, the trolley device 20 operates the boom extending / contracting operation lever 31 so that, as shown in FIG. 8, the telescopic boom 5 is placed below the tip boom 53 to ensure workability as shown in FIG. It can move along the longitudinal direction. When the telescopic boom 5 is extended, first, the trolley device 20 travels from the base end position of the telescopic boom 5 toward the distal end (see FIG. 8), and then the trolley device 20 completely moves to the distal end. As shown in FIGS. 9 and 10, the booms 51, 52, 53 start the extension operation in the order from the proximal boom 51 to the distal boom 53. On the contrary, at the time of reduction, when the telescopic boom 5 is fully reduced, the trolley device 20 starts traveling to the base end position of the telescopic boom.

  In this way, according to the crane 1 for mounting on a railroad vehicle, the telescopic boom 5 is composed of a plurality of booms 51, 52, 53, and the base end side boom 51 becomes narrower, and the reverse boom assembly becomes a thicker boom as it becomes the distal end boom 53. In addition, since the trolley device 20 is provided on the lower surface of the telescopic boom 5, good workability in the loading platform can be ensured.

  In particular, in a general vehicle-mounted crane, the telescopic boom is configured so that it can always be raised and lowered by the boom hoisting cylinder. According to this crane 1 for the rail vehicle mounting, the boom hoisting cylinder 90, the column telescopic cylinder 43, The telescopic boom 5 in the work on the track is regulated so that the boom hoisting cylinder 90 is not operated, and is installed at the front end of the column post 4 so as to be telescopic only in the horizontal direction. . Since the column post 4 can be expanded and contracted in the vertical direction by driving the column telescopic cylinder 43 on the swivel base 19, as shown in FIG. Only the height of the telescopic boom 5 can be changed while maintaining the level. Therefore, since it does not physically exceed the limit height H (for example, 4 m) of the overhead wire, the crane work can be reliably performed within the limit height.

Next, with reference to FIG. 4 and FIGS. 11 to 15, the operation of the above-described railcar mounted crane 1 other than on the track (normal time) will be described.
Except on the track, as shown in FIG. 4, the iron wheels 14 of the track device are stored on the chassis frame 13 side and can travel on tires in the same manner as a normal truck. When crane work is performed on a track other than the track, first, the outrigger is grounded as shown in FIG. 11, and then the boom hoisting cylinder 90 is extended as shown in FIG. Undulate. In this vehicle-mounted crane 1, the oil path of the electromagnetic switching valve 62 is switched in conjunction with the retracted posture of the iron wheel 14, and the supply of pressure oil discharged from the control valve 33 is supplied from the column expansion / contraction cylinder 43. It switches exclusively to the boom hoisting cylinder 90. As a result, the boom hoisting cylinder 90 can be expanded and contracted, and the telescopic boom 5 can be hoisted, while the column telescopic cylinder 43 is disabled. That is, since the column telescopic cylinder 43 and the boom hoisting cylinder 90 are exclusively switchable, the column post 4 cannot be expanded or contracted except on the track.

  However, the movement of the trolley device 20 can be performed on other than the track as shown in FIG. Further, the extension operation of the telescopic boom 5 is automatically switched by the electromagnetic switching valve 61 after the movement of the trolley device 20 in the same manner as on the track. As shown in FIGS. 14 and 15, after the oil path is switched to the telecylinder 54 side so that the electromagnetic switching valve 61 extends the telescopic boom 5, the workability is the same as that of a normal mobile crane. Thereby, this crane 1 for rail vehicle mounting can respond | correspond to work, such as material conveyance to a high place, by raising / lowering the expansion-contraction boom 5 according to expansion / contraction of the boom raising / lowering cylinder 90 except on a track. .

  Thus, according to this vehicle-mounted crane 1, the column post 4 has the column post telescopic mechanism that can be expanded and contracted in the vertical direction on the swivel base 19, and the telescopic boom 5 is an iron wheel for track traveling. Since the boom hoisting operation by the boom hoisting mechanism is operated by switching the post hoisting operation by the post telescopic mechanism in conjunction with the deployment and storage of 14, the posture of the telescopic boom 5 is set on the track. Can be switched exclusively between the horizontal posture and the undulating posture other than on the track. In other words, when the iron wheel 14 is deployed, the track mode (the column post 4 can be expanded and contracted and the telescopic boom 5 cannot be raised and lowered (column post expansion and contraction function)), and when the iron wheel 14 is stored, The mode (the column post 4 is not extendable and the extendable boom 5 can be raised and lowered (boom raising and lowering function)). Therefore, it is possible to ensure the safety of the work on the track while maintaining the convenience as the in-vehicle crane on the track other than the track.

  As described above, the vehicle-mounted crane 1 has the “track mode” and the “general mode”, the “track mode” and the “general mode”, the column telescopic cylinder 43, the boom hoisting cylinder 90, and the like. In the "track mode", it can be used as an on-track work crane that does not physically exceed the overhead line height by having the above-mentioned "column post expansion / contraction function". In addition, in the “general mode”, it can be used as a general mobile crane having the “boom hoisting function”. Therefore, according to this vehicle-mounted crane 1, high versatility is realized in that it can be diverted to general crane work other than on the track while ensuring safe workability on the track.

  Further, according to this vehicle-mounted crane, the switching between the functions of the “track mode” and the “general mode” is provided as a detection means with the limit switch 63 interlocking with the deployment / storage of the iron wheel 14 of the track device, Since the oil passage of the electromagnetic switching valve 62 is switched based on the signal from the limit switch 63, the operation of the boom hoisting cylinder 90 on the track is reliably prevented based on the mechanical operation. Therefore, there is no possibility that the operator erroneously drives the boom hoisting cylinder 90 on the track to raise and lower the telescopic boom 5.

The track-mounted vehicle-mounted crane according to the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, the detection means is configured by detecting the unfolded state and the retracted state of the iron wheel 14 by the limit switch 63, and the boom hoisting mechanism and the post telescopic mechanism are based on ON / OFF of the signal of the limit switch 63. However, the detection means is not limited to this. For example, a track work switch that switches between the deployed posture and the retracted posture of the iron wheel 14 when operated by the operator can be used as the detection means.

1 Rail-mounted crane (crane body)
2 Outrigger 3 Base 4 Column post 5 Telescopic boom 6 Crane mount (Kant compensator)
7 Support bracket (Kant corrector)
8 Crane rotation axis (Kant correction device)
9 Tilt cylinder (Cant correction device)
DESCRIPTION OF SYMBOLS 10 Railroad vehicle 13 Chassis frame 14 Iron wheel 19 Swivel machine base 20 Trolley device 21 Hook 41 Upper housing | casing 42 Lower housing | casing 43 Column expansion cylinder (column post expansion-contraction mechanism)
51 Proximal Boom 52 Intermediate Boom 53 Front Boom 54 Tele Cylinder 90 Boom Lifting Cylinder (Boom Lifting Mechanism)

Claims (6)

A crane for mounting on an orbital vehicle mounted on an orbital vehicle having iron wheels that can be placed on railroad tracks,
A base having an outrigger, a column post installed on a swivel base on the base, a telescopic boom pivotally supported by a pin at an upper end of the column post, and the pin with respect to the column post A boom hoisting mechanism for hoisting the telescopic boom,
The column post has a column post expansion and contraction mechanism capable of expanding and contracting itself in the vertical direction on the swivel base.
The crane for mounted on a rail vehicle, wherein the boom is configured to switch between a boom raising / lowering operation by the boom raising / lowering mechanism and a column post extending / retracting operation by the column post extending / retracting mechanism of the column post. . Having a detecting means for detecting a deployed state and a retracted state of the iron wheel;
Switching between the boom hoisting mechanism and the column post extension mechanism is performed in conjunction with the deployment and storage of the iron wheel based on the detection state of the detection means,
When the iron wheel is in a deployed state, the boom hoisting mechanism is disabled and the column post telescopic mechanism is enabled.
The crane for mounting a railroad vehicle according to claim 1, wherein, when the iron wheel is in a retracted state, the boom hoisting mechanism is operable and the column post expansion / contraction mechanism is inoperable.   The track-mounted crane according to claim 2, wherein the detection means is an electrical detection switch that detects a deployed state and a retracted state of the iron wheel.   The crane for mounting an orbital vehicle according to claim 2, wherein the detecting means is used in common with a track work switch that switches between a deployed posture and a retracted posture of the iron wheel when operated by an operator. The telescopic boom is composed of a plurality of booms and becomes a thicker boom as the base end side boom becomes thinner and becomes a front end boom, and the telescopic boom is a nesting type in which the front end boom is the outermost frame when contracted,
5. The crane for mounting a rail vehicle according to any one of claims 1 to 4, further comprising a trolley device that is movable along a longitudinal direction of the boom at a lower portion of the tip boom.   2. A cant correction device capable of leveling a crane main body while the iron wheels are installed on a railway track when the railway vehicle is working in a curved section of a railway. The crane for mounting on a railroad vehicle according to any one of 5.

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