JP2011219251A - Crane traveling device and crane with traveling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crane traveling device and a crane with a traveling device with good traveling stability by preventing lifting of wheels of an end carriage, and constantly grounding the wheels on rails.SOLUTION: The crane traveling device has a pair of end carriages disposed so as to travel on a pair of traveling rails, and a girder connecting the end carriages. It has a mechanism carrying out control such that the wheels equipped on each end carriage so as to roll on the traveling rails move in mutually opposite vertical directions in conjunction with and in response to traveling of the end carriages, and are grounded on the traveling rails if a difference of inclination angles occurs between the pair of traveling rails.

Description

The present invention relates to a crane traveling device and a crane with a traveling device.

  A crane saddle is a traveling part of a crane that winds and conveys a load, and wheels are attached to a frame of the saddle and move on a traveling path. (See Patent Document 1). The crane saddles are used in pairs, and are used for traveling of the crane by being coupled to both ends of the girder from which the hoisting machine is suspended. (See Patent Document 2)

JP 57-67492 A Japanese Patent Laid-Open No. 4-85295

  Since conventional crane saddles prioritize simplification and durability, as disclosed in Patent Document 1 and Patent Document 2, the left and right wheels are fixed to the saddle frame by axles, and the left and right saddle frames are made of steel. It has a connected structure. For this reason, the left and right wheels are connected to both ends of one shaft, and the left and right wheels move up and down at the same time under the influence of each other, so the grounding property of the wheels has not been ensured. .

  Therefore, it is difficult to ensure the grounding of all the wheels when the road surface is uneven or inclined due to the distortion of the road rail or the runway mounting accuracy.

  An object of the present invention is to provide a crane saddle with good running stability by preventing the wheel from lifting and grounding the wheel on a rail, and to realize stable crane running.

  In order to solve the above-described object, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-mentioned object. To give an example, a pair of crane saddles arranged to be able to travel on a pair of traveling rails, and a girder for connecting the crane saddles. A crane traveling device having a wheel provided on each crane saddle so as to roll on the traveling rail when the inclination angle is different between the pair of traveling rails so as to be grounded on the traveling rail. It has a mechanism to be controlled.

  According to the present invention, the traveling stability of a crane can be improved.

It is an external appearance perspective view of the whole structure of the crane with a traveling apparatus of one Example of this invention. It is a top view of the crane saddle of one Example of this invention. It is a side view of the crane saddle of one Example of this invention. It is an external appearance perspective view of the crane traveling apparatus of one Example of this invention. It is a hydraulic circuit diagram at the time of the alignment mechanism stop of one Example of this invention. It is a hydraulic circuit diagram at the time of alignment operation of one example of the present invention. It is a schematic diagram which shows the behavior of the alignment mechanism at the time of normal. It is a schematic diagram which shows the behavior of the alignment mechanism at the time of the running rail inclination angle θ ° at the time of abnormality. It is a schematic diagram which shows the behavior of the alignment mechanism at the time of the running rail inclination | tilt angle of 0 degree at the time of abnormality.

  Embodiments of the present invention will be described below with reference to FIGS. The present invention is not limited to the illustrated example.

  First, the overall configuration and operation status of the crane with a traveling device will be described with reference to FIG. FIG. 1 is an external perspective view of the overall configuration of a crane with a traveling device according to an embodiment of the present invention.

  First, the whole structure of the crane with a traveling apparatus is demonstrated. There are traveling rails 11a and 11b arranged to face each other in pairs, and a crane saddle 20a including a traveling driving wheel 25a and a driven wheel 26a is installed on the traveling rail 11a so as to be able to travel. On the traveling rail 11b, a crane saddle 20b including a traveling drive wheel 25b and a driven wheel 26b is installed so as to be able to travel. The crane saddles 20a and 20b are connected by a girder 10.

  The crane traveling device of the present invention includes a pair of crane saddles and a girder that connects the crane saddles. In the girder 10, the electric trolley 2 is installed so as to be able to traverse the girder 10, and a saddle control unit 12 that controls the crane saddles 20 a and 20 b is provided. The electric trolley 2 is provided with an electric hoist 1 for moving the load up and down, and the electric hoist 1 is provided with a crane hook 4 for suspending the load. The electric hoist 1 includes a hoisting machine controller 5 that controls the electric hoist 1 and the electric trolley 2, and an operation input device 3 for operating a crane with a traveling device.

  Next, the operation of the crane with the traveling device will be described with reference to FIG. When an operator inputs an operation using the operation input device 3, the hoisting machine control unit 5 controls the movement of the electric hoisting machine 1 and the electric trolley 2 according to the input control signal and is attached to the crane hook 4. The loaded load can be moved in the Z and -Z directions or in the X and -X directions. Similarly, the saddle control unit 12 controls the movement of the crane saddles 20a and 20b in accordance with a control signal input from the operation input device 3, and the load attached to the crane hook 4 is moved in the Y direction and the -Y direction. Can be moved.

  The hydraulic system 54 shown in FIG. 1 is an example of a hydraulic circuit constituting this embodiment, and details will be described later.

  Next, the overall configuration of the crane traveling apparatus of this embodiment will be described with reference to FIGS. 2 (a), 2 (b), and 3. FIG. 2A is a top view of the crane saddle in the present embodiment, FIG. 2B is a side view of the crane saddle in the embodiment of the present invention, and FIG. 3 is an external perspective view of the crane traveling device in the present embodiment. . The crane saddles are used in pairs. In this embodiment, the left and right crane saddles have the same configuration, and therefore, FIG. 2 (a) and FIG. 2 (b) are used. Only the configuration of one crane saddle will be described.

  As shown in FIGS. 2A and 2B, the crane saddle 20a includes a driving wheel 25a for traveling, a driven wheel 26a, and a hydraulic cylinder 43a on a saddle frame 28a. The saddle frame 28a has a substantially rectangular parallelepiped shape, and dampers 30 serving as shock absorbing devices are attached to both end faces in the longitudinal direction of the saddle frame 28a, that is, both end faces facing the running direction.

  An axle 27 is attached to one end of the saddle frame 28a in the longitudinal direction by an axle stopper 29, and a traveling drive wheel 25a is rotatably attached to the axle 27. The traveling drive wheel 25a is a wheel that is rotated by a driving device. As the driving device for the traveling drive wheel 25a, an electric motor 21 that rotationally drives the traveling drive wheel 25a, a brake 22 that is a braking mechanism of the electric motor 21, a traveling A speed reduction portion 23 that adjusts the rotational speed of the driving wheel 25a and the final speed reduction stage 24 are combined and attached. Between the saddle frame 28a and the drive wheel 25a, a final reduction part 24 is attached so as to be connected to the drive wheel 25a, and a reduction part 23 is attached outside the saddle frame 28a so as to be connected to the final reduction part 24. Yes. An electric motor 21 is attached to the speed reduction portion 23, and a brake 22 is provided inside the electric motor to constitute a drive device. Further, the upper part of the traveling drive wheel 25 a is covered with a traveling drive wheel cover 31.

  A rotation shaft 41a is attached to the other end of the saddle frame 28a in the longitudinal direction by an axle stopper 29, and a rotation plate 40a is rotatably attached to the rotation shaft 41a. An axle 27 is attached to one end of the rotating plate 40a, and a driven wheel 26a is rotatably attached to the axle 27. The driven wheel 26a is a non-driven wheel that rolls as the crane saddle travels.

  A cylinder shaft 42a is attached to the other end of the rotating plate 40a, and a cylinder rod 44a attached to the cylinder 43a is attached to the cylinder shaft 42a. The cylinder 43a is connected to the rotating plate 40a via a cylinder rod 44a and is attached to the saddle frame 28a by a cylinder shaft 42b.

  In the above configuration, the driven wheel 26a is connected to the rotating plate 40a via the axle 27, and the cylinder rod 44a of the hydraulic cylinder 43a is connected to the rotating plate 40a via the cylinder shaft 42a. Since the driven wheel 26a and the cylinder rod 44a are mechanically linked to the rotating plate 40a, the rotating plate 40a uses the rotating shaft 41a as a fulcrum according to the movement of the driven wheel 26 and the cylinder rod 44. When one end is raised, the other end is lowered, and when one end is lowered, the other end is raised. That is, the rotating plate 40 is provided so as to move up and down in a so-called seesaw shape with the rotating shaft 41 as a fulcrum.

  Next, the overall configuration of the crane traveling device will be described with reference to FIG. As shown in FIG. 3, the crane saddle has a pair of saddle frames 28 a and 28 b connected by a girder 10.

  The hydraulic cylinder 43a and the hydraulic cylinder 43b provided in each saddle frame are connected via oil passages 47a, 47b, 47c, 47d, 47e, 47f, which are hydraulic oil communication passages, and the operations of the hydraulic cylinders are interlocked. It is configured as follows. Further, in the oil passage connecting the hydraulic cylinder 43a and the hydraulic cylinder 43b, a variable throttle valve 50 for adjusting the flow of oil in the oil passage, and a direction control valve for switching between the oil passages to a communication state or a communication cut-off state. 51, a relief valve 52 for adjusting the oil pressure in the oil passage, and an oil tank 53 for storing hydraulic oil. And between the hydraulic cylinder 43a and the hydraulic cylinder 43b, the hydraulic circuit demonstrated below is comprised. The configuration of the hydraulic cylinder forming this hydraulic circuit is the alignment mechanism of this embodiment.

4 and 5 are examples of a hydraulic circuit diagram configured by the hydraulic cylinder of the present invention. FIG. 4 is a diagram when the alignment mechanism is stopped, and FIG. 5 is a diagram when the alignment mechanism is activated.
As shown in FIGS. 4 and 5, a cylinder rod 44a is attached to the hydraulic cylinder 43a, and the interior of the hydraulic cylinder 43a is divided into a rod side chamber 45a and a piston side chamber 46a across the cylinder rod 44a. Similarly, in the cylinder 43b, a cylinder rod 44b is attached to the hydraulic cylinder 43b, and the inside of the hydraulic cylinder 43b is divided into a rod side chamber 45b and a piston side chamber 46b with the cylinder rod 44b therebetween.

  The rod side chamber 45a of the hydraulic cylinder 43a communicates with the rod side chamber 45b of the hydraulic cylinder 43b through an oil passage 47a, and the two hydraulic cylinders are connected in parallel. Further, the piston side chamber 46a of the cylinder 43a is connected to the direction control valve 51 by an oil passage 47b, and the direction control valve 51 is further connected to the tank 53 through an oil passage 47c. The piston side chamber 46b of the cylinder 43b is connected to the direction control valve 51 via an oil passage 47f, and the direction control valve 51 is further connected to the tank 53 via an oil passage 47c. The cylinders 43a and 43b and the oil passage are filled with hydraulic oil.

  The directional control valve 51 shown in FIGS. 4 and 5 includes a spool 51e having each port connected to each oil passage, a closed structure 51c that shuts off each port, and an open structure 51d that communicates each port. And an electromagnetic solenoid 51a for moving the spool 51e and a spring 51b for returning the spool 51e to the initial position.

The spool 51e has an electromagnetic solenoid 51a attached to one end in the longitudinal direction, and a spring 51b attached to the other end. In this embodiment, the initial state of the spool 51e is set so that a closed structure 51c is provided at each port, as shown in FIG.
The direction control valve 51 has four ports, the A port is connected to the piston side chamber 46a of the hydraulic cylinder 43a, and the B port is connected to the piston side chamber 46b of the hydraulic cylinder 43b. Further, the P port and the R port are connected to the oil tank 53, respectively. When the closed structure 51c of the spool 51e is located at each port, all of the four ports are in the communication cut-off state as shown in FIG. 4, and when the open structure 51d is located at each port, the A as shown in FIG. The port and the P port are communicated, and the B port and the R port are communicated.

  The direction control valve 51 is switched by the saddle control unit 12 causing the electromagnetic solenoid 51a to move the spool 51e in accordance with a control signal input from the operation input device 3. When the alignment mechanism is operated, the spool 51e is moved by the electromagnetic solenoid 51a, and the spool opening structure 51d is positioned at each port. When stopping the alignment mechanism, the operation of the electromagnetic solenoid 51a is stopped, and the spool 51e is returned to the initial position by the spring force of the spring 51b.

  As shown in FIGS. 4 and 5, a variable throttle valve 50 is provided between the oil passage 47a, which is a hydraulic oil communication passage. The variable throttle valve 50 is provided with an adjustment screw (not shown), and the operator can shut off the flow of hydraulic oil by tightening the adjustment screw of the variable throttle valve 50. Thereby, it is possible to easily perform maintenance such as damage to the oil passage of the crane traveling device or prevention of oil loss during replacement and oil draining of the oil tank 53.

  Also, as shown in FIGS. 4 and 5, a relief valve 52 is provided in the oil passage 47e communicated between the oil passage 47c and the oil passage 47d. When the hydraulic pressure in the oil passage becomes higher than the set value, the relief valve 52 is opened, and a part of the hydraulic oil in the oil passage flows into the oil tank 53. Accordingly, the hydraulic circuit of the crane traveling device can be protected without excessively increasing the hydraulic pressure in the oil passage.

  4 and 5, the hydraulic cylinder 43a and the hydraulic cylinder 43b include a rod side pressure receiving area of the hydraulic cylinder 43a, a rod side pressure receiving area of the hydraulic cylinder 43b, and a piston side pressure receiving area of the hydraulic cylinder 43a. The piston side pressure receiving area of the hydraulic cylinder 43b is set to be the same. That is, assuming that the bore diameter of the hydraulic cylinder 43a is d1 and the bore diameter of the hydraulic cylinder 43b is d2, the hydraulic cylinder so that the relationship of (πd12) / 4 = (πd22) / 4, that is, the relationship of d1 = d2 is established. When the rod diameter of 43a is d3 and the rod diameter of the hydraulic cylinder 43b is d4, ((πd12) / 4) − ((πd32) / 4) = ((πd22) / 4) − ((πd42) / 4) The hydraulic cylinder 43a and the hydraulic cylinder 43b are configured so that the relationship, that is, the relationship of d3 = d4 is established.

  Thus, between the hydraulic cylinder 43a and the hydraulic cylinder 43b connected by the sealed oil passage 47, the applied pressure and the transmitted pressure are proportional to the cross-sectional area of each hydraulic cylinder, and the hydraulic cylinder moves. The distance is inversely proportional to each cross-sectional area. That is, since the product of force and distance is the same for both hydraulic cylinders, the amount of hydraulic oil transmitted between the hydraulic cylinder 43a and the hydraulic cylinder 43b is equal to the pressure, and the operation directions of the two hydraulic cylinders are equal to each other. Operates to expand and contract.

  In the operation of the hydraulic cylinder, a case where the hydraulic cylinder 43a extends and the hydraulic cylinder 43b retracts will be described. First, as shown in FIG. 5, each port is brought into a communication state by the direction control valve 51, and the alignment mechanism is activated. When the cylinder rod 44a of the hydraulic cylinder 43a is extended, the hydraulic oil in the rod side chamber 45a of the hydraulic cylinder 43a is supplied to the rod side chamber 45b of the hydraulic cylinder 43b via the oil passage 47a, and the hydraulic cylinder rod 44b of the hydraulic cylinder 43b. Is degenerated by an amount corresponding to the hydraulic oil discharged from the rod side chamber 45a of the hydraulic cylinder 43a. Then, the hydraulic oil corresponding to the degeneration of the cylinder rod 44b of the cylinder 43b is discharged from the piston side chamber 46b of the cylinder 43b and supplied to the piston side chamber 46a of the cylinder 43a.

  Similarly, when the hydraulic cylinder 43b is extended and the hydraulic cylinder 43a is retracted, the ports are in communication with each other by the direction control valve 51 as shown in FIG. 5, and the alignment mechanism is activated. . When the cylinder rod 44b of the hydraulic cylinder 43b is extended, the hydraulic oil in the rod side chamber 45b of the hydraulic cylinder 43b is supplied to the rod side chamber 45a of the hydraulic cylinder 43a via the oil passage 47a. The hydraulic cylinder rod 44a is degenerated. Then, the hydraulic oil corresponding to the degeneration of the cylinder rod 44a of the cylinder 43a is discharged from the piston side chamber 46a of the cylinder 43a and supplied to the piston side chamber 46b of the cylinder 43b.

  The crane saddle of the present embodiment is used as follows by extending and contracting the operating directions of the two hydraulic cylinders in the opposite direction. The operation of the alignment mechanism during traveling of the crane saddle of this embodiment will be described with reference to FIGS. FIG. 6 is a schematic diagram showing the behavior of the driven wheel 26 of the crane saddle that travels on the traveling rail 11 with small manufacturing and mounting errors and no inclination. 7 and 8 are schematic views showing the behavior of the driven wheel of the crane saddle traveling on the traveling rail when there is an inclination on one side of the traveling rail. FIG. 7 is a diagram on the traveling rail 11a having an inclination of θ °. Fig. 8 is a schematic diagram showing the behavior of one driven wheel of a pair of crane saddles, and Fig. 8 is a schematic diagram showing the behavior of the other driven wheel of a pair of crane saddles on a traveling rail 11b having no inclination. is there. Moreover, the schematic diagrams of FIGS. 6 to 8 describe the configurations of a driven wheel, a rotating plate, and a cylinder that are particularly provided in the saddle frame.

  First, the traveling operation of the crane traveling device will be described with reference to FIGS. 2 (a) and 2 (b). The crane saddle is controlled and operated by the saddle control unit 12 in accordance with a control signal input by the operation input device 3. When the brake 22 and the motor 21 are energized by the saddle control unit 12, the brake 22 is released and the rotation of the motor 21 is started. The rotation of the electric motor 21 is decelerated to a predetermined rotational speed by the speed reduction unit 23 and the final speed reduction stage 24 and is transmitted to the driving wheel 25 for traveling, and the traveling wheel 25 is rotated so that the crane saddle forms a pair of traveling. Travel on the rail 11.

  At this time, as shown in FIG. 6, when traveling on a traveling rail with a small manufacturing and mounting error and without inclination, each driven wheel 26 of the saddle frame forming a pair is grounded on the traveling rail 11, It is rotated as the crane saddle travels.

  As shown in FIGS. 7 and 8, when there is an inclination on one side of a pair of traveling rails, that is, when a difference in inclination angle occurs between the rails in a pair of traveling rails, The driven wheel is moved.

  As shown in FIG. 7, when the traveling rail 11a on one side is inclined, the driven wheels 26a that roll on the traveling rail 11a are moved upward by following the traveling rail 11a, and are connected to each other. The rotary plate 40a is pushed up by θ ° through 27a. The rotating plate 40a is rotated upward in the form of a seesaw with the rotating shaft 41a as a fulcrum, and the hydraulic cylinder rod 44a of the hydraulic cylinder 43a connected to the end of the rotating plate 40a is lowered by ΔS. As a result, the hydraulic oil in the rod side chamber 45a of the hydraulic cylinder 43a is supplied to the rod side chamber 45b of the hydraulic cylinder 43b via the oil passage 47a, and the hydraulic cylinder rod 44b of the hydraulic cylinder 43b is connected to the hydraulic cylinder 43a as shown in FIG. It is degenerated by an amount corresponding to the hydraulic oil discharged from the rod side chamber 45a, and is pushed up by ΔS. Then, the end of the rotating plate 40b is rotated downward in a seesaw shape with the rotating shaft 41b as a fulcrum, and the driven wheel 26b is grounded and rolled on the traveling rail 11b.

  Thus, according to the present invention, the driven wheel of each crane saddle is mechanically linked to the hydraulic cylinder via the rotating plate, and the hydraulic cylinders are linked to each other by forming a hydraulic circuit. Even when road surface unevenness or inclination occurs, the crane saddle wheel during traveling is controlled to be grounded on the traveling rail, so that the crane can travel stably.

  In this embodiment, a hydraulic cylinder using hydraulic oil as a pressure source is used, but not limited to a hydraulic cylinder, an air cylinder using air as a pressure source or a cylinder using other pressure sources is used instead. May be.

  Note that the crane saddle of the present invention can travel even when the alignment mechanism of the present invention is in a stopped state, that is, when the directional control valve 51 is positioned as shown in FIG.

  At this time, the oil passage of the hydraulic circuit is blocked and the hydraulic oil does not move, so that the movement of the cylinder is fixed. Therefore, the position of the rotating plate connected to the cylinder and the driven wheel connected to the rotating plate is fixed. That is, the driven wheel provided in each saddle frame is in a state similar to the state in which the driven wheel is rotatably supported by the saddle frame, and rolls as the crane saddle travels. Therefore, the crane saddle of the present invention can travel even when the alignment mechanism is in the oil passage communication cut-off state. Further, even when an abnormality occurs in the alignment mechanism such as a hydraulic circuit, the traveling state can be maintained as a crane saddle, so that the crane can be used without being stopped. Moreover, since the alignment mechanism can be stopped on the operator side by providing the direction control valve 51, the safety of the user can always be ensured.

DESCRIPTION OF SYMBOLS 1 ... Electric hoist 2 ... Electric trolley 3 ... Operation input device 4 ... Crane hook 5 ... Hoisting machine control part 10 ... Girder 11a, 11b ... Travel rail 12 ... Saddle control part 20a, 20b ... Crane saddle 21 ... Electric motor 22 ... Brake 23 ... Decelerator 24 ... Final deceleration stage 25a, 25b ... Driving drive wheels 26a, 26b ... Driving wheels 27a, 27b ... Axles 28a, 28b ... Saddle frames 29a, 29b ... Axle stoppers 30 ... Damper 31 ... Driving drive Wheel covers 40a, 40b ... rotating plates 41a, 41b ... rotating shafts 42a, 42b, 42aa, 42ab, 42bb, 42ba ... cylinder shafts 43a, 43b ... hydraulic cylinders 44a, 44b ... hydraulic cylinder rods 45a, 45b ... rod side chambers 46a 46b ... Piston side chambers 47a, 47b, 47c, 47d, 47e, 47f ... Road 50 ... variable throttle valve 51 ... directional control valves 51a ... electromagnetic solenoid 51b ... spring 51c ... closed structure 51d ... open structure 51e ... spool 52 ... relief valve 53 ... oil tank 54 ... hydraulic system

Claims (16)

A crane traveling device having a pair of crane saddles arranged to be able to travel on a pair of traveling rails, and a girder connecting each crane saddle,
When there is a difference in the inclination angle between the pair of traveling rails, the wheels provided on each crane saddle to roll on the traveling rails are interlocked according to the traveling of each crane saddle, and in the vertical direction. A crane traveling device having a mechanism controlled to move in a contradictory manner and to contact the traveling rail. A crane traveling device having a pair of crane saddles arranged to be able to travel on a pair of traveling rails, and a girder connecting each crane saddle,
The crane saddle is
A saddle frame,
A driving wheel that is rotatably supported at one end of the saddle frame and is driven to rotate on a traveling rail by a driving device;
A rotation plate rotatably supported at the other end of the saddle frame and provided to rotate;
A driven wheel that is rotatably supported at one end of the rotating plate and is provided to roll on a traveling rail;
A cylinder connected to the other end of the rotating plate and attached to the saddle frame and driven by pressure;
A communication path attached to the cylinder and through which a drive source of the cylinder passes,
The cylinders of the crane saddles are linked and interlocked by the communication path, so that the driven wheels connected to the cylinders via the rotating plate conflict with each other in the vertical direction according to the operation of the cylinders. A crane traveling device characterized by being moved to   The crane traveling device according to claim 2, wherein each of the cylinders has the same pressure receiving area, or has the same cylinder bore diameter and cylinder rod diameter.   The crane traveling device according to claim 2, wherein the cylinder is a hydraulic cylinder that is driven by a pressure of hydraulic oil.   The rotating plate is rotatably supported on the saddle frame by a rotating shaft, and both end portions of the rotating plate are rotated so as to oppose each other in the vertical direction with the rotating shaft as a fulcrum. The crane traveling device according to claim 2.   The crane travel device according to claim 2, wherein a control valve for switching between the cylinders to a communication state or a communication cut-off state is provided in the communication path.   The crane travel device according to claim 2, wherein a control valve for adjusting a flow of a pressure driving source is provided in the communication path.   The crane travel device according to claim 2, wherein a control valve for adjusting a pressure in the communication path is provided in the communication path. A crane traveling device having a pair of crane saddles arranged to be able to travel on a pair of traveling rails, and a girder connecting each crane saddle,
The crane saddle is
A saddle frame,
A driving wheel that is rotatably supported at one end of the saddle frame and is driven to rotate on a traveling rail by a driving device;
A rotation plate rotatably supported at the other end of the saddle frame and provided to rotate;
A driven wheel that is rotatably supported at one end of the rotating plate and is provided to roll on a traveling rail;
A cylinder connected to the other end of the rotating plate and attached to the saddle frame and driven by pressure;
A communication path that is attached to the cylinder and through which a drive source of the cylinder passes,
The cylinder of each saddle frame is connected by the communication path, and includes a control valve that switches between the cylinders in a communication state or a communication cutoff state in the communication path.
When the cylinders are in communication with each other by the control valve, the driven wheels connected to the cylinders via the rotating plate are connected to the cylinders by interlocking the cylinders. In response, it is moved so as to conflict in the vertical direction,
When the control valve is in a communication cut-off state between the cylinders, the vertical movement of each driven wheel is fixed. A crane with a traveling device for transporting a load along a pair of traveling rails,
The traveling device of the crane with the traveling device comprises a pair of crane saddles arranged so as to be able to travel on a pair of traveling rails, and a girder connecting the crane saddles,
The crane saddle is
A saddle frame,
A driving wheel that is rotatably supported at one end of the saddle frame and is driven to rotate on a traveling rail by a driving device;
A rotation plate rotatably supported at the other end of the saddle frame and provided to rotate;
A driven wheel that is rotatably supported at one end of the rotating plate and is provided to roll on a traveling rail;
A cylinder connected to the other end of the rotating plate and attached to the saddle frame and driven by pressure;
A communication path that is attached to the cylinder and through which a drive source of the cylinder passes,
The cylinders of each crane saddle are linked and linked by the communication path, and the driven wheels connected to the cylinder via the rotating plate move so as to oppose each other according to the operation of each cylinder. A crane with a traveling device.   The crane with a traveling device according to claim 10, wherein each of the cylinders has the same pressure receiving area, or the cylinder bore diameter and the cylinder rod diameter are the same.   The crane with a traveling device according to claim 10, wherein the cylinder is a hydraulic cylinder driven by hydraulic oil pressure.   The rotating plate is rotatably supported on the saddle frame by a rotating shaft, and both end portions of the rotating plate are rotated so as to oppose each other in the vertical direction with the rotating shaft as a fulcrum. The crane with a traveling apparatus of Claim 10.   The crane with a traveling device according to claim 10, wherein a control valve for switching between the cylinders to a communication state or a communication cut-off state is provided in the communication path.   The crane with a traveling apparatus according to claim 10, wherein a control valve for adjusting a flow of a pressure drive source is provided in the communication path.   The crane with a traveling apparatus according to claim 10, wherein a control valve for adjusting a pressure in the communication path is provided in the communication path.

Images