JP2002019629A - Traveling device of transfer crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traveling device of a transfer crane capable of completely removing tilting of a tire to axial direction on traveling including longitudinal, lateral and concentric circle rotating movement of a crane while using only one tire rotating device per under carriage. SOLUTION: This traveling device of the transfer crane is provided with a traveling driving device 50 attached to at least a split body 30" of front and rear split bodies 30' and 30" of the each under carriage 20 for driving the tire 40", the tire rotating device 60 acting on the split body 30' of the front and rear split bodies 30' and 30" of the each under carriage 20 to give steering force to the tire 40' attached hereto, a connecting device 70 connected between the front and rear split bodies 30' and 30" to transmit the steering force of the split body 30' to which the steering force is given to the another split body 30" so that a steering angle of the split body 30' to which the steering force is given is different from a steering angle of the another split body 30", and a steering angle fixing device 80 fixing the steering angle of the front and rear split bodies 30' and 30" from a requested angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer crane, and more particularly, to a transfer crane using only one tire rotation device and steering angle fixing device for each chassis used for a traveling device of the crane. Move the crane back and forth,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling device of a tire-type transfer crane that can prevent a tilt phenomenon of a tire when moving laterally and rotating concentrically, and can firmly fix a tire steered in each direction.

As shown in FIG. 1, a transfer crane supports a girder 3 between left and right posts 2, and mounts a trolley 4 traversable on the girder 3 to transport a cargo 5. It is widely used to carry cargo 5 such as a container box at a container pier or a container storage area.

The transfer crane 1 has four chassis 1 each having two or four tires as a device for traveling while steering the crane itself in a desired direction.
Traveling device 100 supporting bed 6 of crane 1 at 10
Is widely used. The transfer crane 1 can freely perform traveling such as forward / backward traveling, lateral traveling, and concentric rotation by the undercarriage-type traveling device 100 equipped with such tires.

FIG. 2 is a schematic diagram of a chassis showing an example of a conventional traveling device applied to a transfer crane. As shown in the figure, each chassis 110 is provided with a front and rear divided body 130 rotatable around two support shafts 120 supporting the crane 1. Each divided body 130 is movably mounted with one tire 140 for eight-wheel support and two tires 140 for 16-wheel support. Further, each chassis 110 is provided with a traveling drive device 150 for driving the tire 140. Tire 140 for each divided body 130 of chassis 110
And a fixing hydraulic cylinder 170 for fixing the steered tire 140 at a predetermined steering angle position. That is, the conventional traveling device 10 of the transfer crane 1 to which the undercarriage 110 is applied shown in FIG.
0 denotes four traveling drive units 150 for one crane 1 and eight hydraulic cylinders 160 for rotation.
And a fixing hydraulic cylinder 160.

[0005] The conventional traveling device 100 having such a configuration is described.
Has a configuration in which a separate hydraulic cylinder for rotation 160 and a hydraulic cylinder for fixing 170 are attached to each of the divided bodies 130 of the chassis 110, the structure is extremely complicated,
In addition, there is a problem that an increase in weight and an expensive production cost are required. Further, in the conventional traveling device 100 of FIG. 2, the rotating hydraulic cylinder 160 mounted on each tire 140 is provided.
Are individually actuated so that there is a difference in the steering angles of the tires traveling on the outer circumference and the inner circumference, thereby preventing the tire from tilting when the crane 1 rotates concentrically.
However, for this purpose, there is a disadvantage that all the hydraulic cylinders 160 for rotation must be individually and finely controlled in order to maintain the directions of all the tires 140 exactly perpendicular to the rotation center of the crane 1.

FIG. 3 is a schematic view of a chassis showing another example of a conventional traveling device applied to a transfer crane. As shown in the drawing, the conventional chassis 210 has divided bodies 230 rotatably mounted around two support shafts 220 supporting the crane 1. Each of the divided bodies 230 is the same as the conventional chassis 110 in FIG. 2 in that one or two tires 240 are mounted. However, each chassis 2
While only one rotating hydraulic cylinder 260 and fixing hydraulic cylinder 270 are used per 10
0 to the connecting rod 280
Are linked by That is, the hydraulic cylinder for rotation 26
When the steering angle of the tire 240 of the one-side split body 230 is changed by 0, the steering angle of the front and rear tires 240 is changed by the action of changing the steering angle of the tire of the other-side split body 230 in conjunction with the connecting rod 280. The point of adopting the configuration that adjusts in conjunction with is that the chassis 1 shown in FIG.
Different from 10.

However, the conventional crane traveling apparatus shown in FIG. 3 has an advantage that the number of the rotary hydraulic cylinders 260 and the fixing hydraulic cylinders 270 is reduced to half to simplify the structure of the apparatus. The center of each tire 240 cannot be maintained perpendicular to the rotation center of the crane 1 during the concentric rotation movement, and the frame limit L1 of the chassis 210 must be maintained perpendicular to the rotation center of the crane 1. There is. As a result, not all the tires are maintained parallel to the tangent line of the crane rotation trajectory, and the vehicle must be driven with a slightly shifted position. As a result, the phenomenon that the tire 240 is tilted in the axial direction cannot be fundamentally eliminated. The problem is fundamentally included.

The more serious problem of the conventional traveling apparatus of FIG. 3 is more serious when the crane 1 is rotated concentrically. More specifically, as shown in FIG. 4, when it is assumed that the center O1 is the rotation center of the crane, and the vertical lines L on both sides are the center lines of the left and right chassis 210 installed at the same interval. , Tires 24 of each chassis 210
0 changes direction by translation of the parallelogram formed by the two divided bodies 230 connected by the hydraulic cylinder for rotation 260 and the connecting rod 280, so that the front tire 240 'and the rear Tire 240 "can only be steered to the same steering angle.

Therefore, when the tires 240 of the four chassis 210 are turned around the circle C in order to move the crane 1 concentrically, the front chassis 21 is rotated.
0 'front tire 240' and rear tire 240 "rear tire 240" are connected to rear tire 24 of front chassis 210 '.
In comparison with the front tire 240 ′ of the rear chassis 210 ″, the vehicle travels a larger circumference by ΔR with respect to the rotation center O1.

As a result, the tires running on the outer circumference (240 'of 210' and 210 'of 240') are replaced with the tires running on the inner circumference (240 'and 21' of 210 ').
When the tires are driven at the same speed as 0 ′ (240 ′), the speeds of the tires running on the outer circumference become relatively slow, and eventually each chassis 210 moves outward due to the difference in the relative speed of the front and rear tires 240. As a result, the rotation of the crane 1 is obstructed, and one-sided wear of the tire occurs.

However, the tire (21) traveling on the outer circumference
Increasing the running speed of 0 '240' and 210 "240 ') does not solve the tilt problem. That is, since the conventional rotary hydraulic cylinder 260 connects the two divided bodies 230 of the chassis in a parallelogram as described above, the front and rear tires 240 ′,
40 "can only be turned to the same angle, and when a tangent to the rotation center O1 is drawn from the center of each tire, there is a large difference between the steering angles A and A 'of the front tire and the rear tire of each chassis. I understand.

In FIG. 4, the rotation trajectory of the crane 1 is
The circle C passes through the center of 0, and the running direction of each tire 240 is a direction parallel to a tangent to the circle C. When following such a rotation trajectory, the left front chassis 210'a
And the right rear chassis 210 ″ b are on the inside,
Since 0'a and the right front chassis 210 "b are inclined outward, the front tire 240 'and the rear tire 24 of each chassis are inclined.
Even if the traveling speed of 0 "is made differential, smooth rotation of the crane is not guaranteed.

Such a problem is even more serious in a 16-wheel crane in which front and rear tires are paired. That is, in the case of 16 wheels, the four tires mounted on each chassis have different turning radii and different tangential directions and tangential velocities when the crane rotates as described above. Smooth rotation is no longer ensured, and the radius of rotation is considerably larger than the width of the crane, which causes a problem that space efficiency of the container wharf or the loading dock is greatly reduced.

In accordance with such a problem, an 8-wheel crane has been mainly used rather than a 16-wheel clean.
8-wheeled cranes have a ground contact pressure of 2 compared to 16-wheeled cranes.
It is difficult to use on soft ground because it is twice as large, and the allowable ground pressure must be set to twice or more in the design of piers and loading areas, so there is also a problem that additional cost is required for foundation work or concrete work etc. Trigger.

[0015]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tire axle for all travels including forward and backward, lateral and concentric rotational movements of a crane while using only one tire rotating device per chassis. An object of the present invention is to provide a traveling device for a transfer crane that can completely eliminate directional inclination.

Another object of the present invention is to securely fix a tire to a steering angle corresponding to forward / backward, lateral, and concentric rotation movements while using only one steering angle fixing device per chassis. An object of the present invention is to provide a traveling device for a transfer crane.

[0017]

According to the present invention, there is provided a traveling apparatus for a transfer crane including a plurality of chassis each having a front and rear division having tires mounted thereon, wherein at least one of the front and rear divisions of each chassis is provided. A driving device for driving one of the tires mounted on the vehicle; a tire rotating device acting on one of the front and rear divided bodies of the chassis to provide a steering force to the tire mounted thereon; The steering of the split body connected between the front and rear split bodies and provided with the steering force such that the steering angle of the split body provided with the steering angle is different from the steering angle of the other split body. A traveling device for a transfer crane, comprising: a connecting device for transmitting a force to the other divided body; and a steering angle fixing device for fixing a steering angle of the front and rear divided bodies from a desired angle. Is done.

The connecting device may include a long connecting rod connected to one of the front and rear splits, a shot connecting rod connected to the other split, and a chassis between the two splits. Is fixed, and the other end may include a joint link connecting the long connecting rod and the shot connecting rod.

The steering angle fixing device is mounted on one of the front and rear divisions, rotates integrally with the division, and steers the tire in accordance with the forward / backward movement, lateral movement, and concentric rotation movement of the crane. A rotating yoke with concave grooves corresponding to the corners,
It may be configured to include a fixed cylinder that selectively meshes with the concave groove to fix a steering state of the divided body.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a traveling device of a transfer crane according to the present invention. The following specific examples exemplify a traveling device of a transfer crane according to the present invention, and do not limit the scope of the present invention.

FIGS. 5 to 7 are schematic plan views of a chassis showing a configuration of a traveling device of the transfer crane according to the present invention. FIG. 5 is a plan view of a state in which tires are steered so that the crane can move forward and backward. FIG. 6 is a plan view showing a state in which the tires are steered so that the crane can move concentrically. FIG. 7 is a plan view showing a state in which the tires are steered so that the crane can move laterally. 8 to 10 are schematic diagrams showing the operation of the limit switch installed in the steering angle fixing device. FIG. 8 is a diagram in which the steering angle of the tire is fixed in the forward and backward traveling state, and FIG. FIG. 10 is a view in which the steering angle is fixed to a concentric rotation movement state, FIG. 10 is a view in which the steering angle fixing device is released from the concave groove, and FIG. 11 is a view showing an operation of a limit switch installed in the rear split body. It is.

First, referring to FIG. 5, a description will be given of a configuration of a traveling device of a transfer crane according to the present invention, taking a 16-wheel traveling device as an example. The traveling device 10 of the transfer crane according to the present invention comprises four chassis 2 having a rotatable front and rear split body 30 on which tires 40 are mounted.
This is a traveling device applied to the above-described transfer crane 1 provided with a traveling drive device 50, a traveling drive device 50, a tire rotation device 60, a connecting device 70, and a steering angle fixing device 80, one for each chassis 20. Is included.

The traveling driving device 50 is a device for providing a driving force to the tires 40 so that the crane 1 can travel, and a general driving device usually used for the transfer crane 1 is applied as it is. Since the specific configuration or power transmission relationship of the driving device is not directly related to the features of the present invention, a detailed description will be omitted.

However, in the present invention, the traveling drive device 50
5 does not exclude mounting on all of the front and rear divided bodies 30 'and 30 "so as to drive all the tires 40 of each chassis 20, but in terms of simplifying the configuration of the apparatus, FIG.
It is preferable that power is transmitted only to the rear wheel tire 40 "and the front wheel tire 40 'is idle-driven. In this case, the traveling drive device 50 is mounted on the rear split body 30", and is shown in FIGS. As shown in FIG. 7, it is turned integrally with the rear split body 30 ″ during the steering operation.

In order to steer the traveling direction of the crane 1, the position of the tire 40 must be rotated at a predetermined steering angle about the support shaft 11 of the crane 1. For this purpose, the traveling device 10 of the present invention is provided with one tire rotation device 60 for each chassis 20. The tire rotation device 60 that can be used is the tire 4
There is no particular limitation as long as it can be rotated in the direction in which the steering wheel 0 is to be steered, but one end is rotatably fixed to the fixed frame 21 of the chassis 20 as shown in FIGS. The other end uses a hydraulic cylinder 61 rotatably connected to one of the two divided bodies 30 ', 30 "of the chassis 20 at a position separated from the support shafts 11', 11" by a predetermined distance. Is preferred.

In this embodiment, a hydraulic cylinder 61 is provided between a crank plate 62 'fixedly mounted on the front split body 30' and the fixed frame 21 of the chassis 20 so as to rotate integrally with the front split body 30 '. Are connected to each other. According to such a configuration of the tire rotation device 60, when the hydraulic cylinder 61 is operated, the support shaft 11 '
While the crank plate 62 'rotates around the front divided body 3
0 'also rotates about the support shaft 11', and the steering angle of the tire 40 'mounted here changes.

In the traveling device 10 of the present invention, only one tire rotating device 60 is mounted for each chassis 20 and is directly applied to only the tire 40 'of the one-side divided body (eg, the front divided body: 30'). That is, the steering force is applied. Therefore, the tire 4 of the divided body (eg, the rear divided body: 30 ″) on the side where the steering force of the tire rotation device 60 is not directly applied
In order for the steering force of the tire rotation device 60 to be applied to 0 ", a configuration for transmitting the steering force of the steering device from the front split body 30 'to the rear split body 30" is required.

For this reason, in the present invention, the connecting device 70 is installed between the front divided body 30 'and the rear divided body 30 "to transmit the steering force. According to the traveling device 10 of the present invention, the connecting device is connected. When the steering angle of the tires has to be maintained at 0 ° or 90 ° in order to move the crane 1 forward or backward or to move sideways, the device 70 will ensure that all the tires are exactly as shown in FIGS. 5 and 7. However, when the tire 40 is steered to a steering angle uniquely determined for each crane in order to concentrically rotate the crane 1, the front split body 30 ′ is maintained as shown in FIG. The steering angle and the steering angle of the rear split body 30 ″ are different from each other. As described in connection with FIG. 4, all the tires 40 of the chassis 20 are always positioned perpendicular to the center of the concentric rotation locus of the crane 1, and the phenomenon of tilting in the axial direction of the tires is completely eliminated. Remove.

For example, when the crane 1 rotates concentrically, it depends on the position of each chassis 20 with respect to the crane 1 (front position and rear position) and the position of each tire 40 within each chassis 20 (front position and rear position). Between the front divided body 30 'and the rear divided body 30 "such that the tire traveling on the inner circumference and the tire 40 traveling on the outer circumference are all positioned perpendicular to the center of the concentric rotation locus of the crane 1. 6, the steering angle θ1 of the front tire 40 ′ is changed to the steering angle of the rear tire 40 ″ when the crane 1 rotates concentrically in the counterclockwise direction in FIG. θ2, so that all the front tires 40 ′ running on the outer circumference and the rear tires 40 ″ running on the inner circumference are positioned perpendicular to the center of the rotation trajectory of the crane, Front split body 30 'and rear split body 3
The connection between 0 ″ is connected to the connecting device 70 having a characteristic configuration.

The steering angle of the front divided body 30 'and the rear divided body 3
As shown in FIGS. 5 to 7, a connecting device 70 for making the steering angles of 0 ″ different from each other includes a long connecting rod 71 connected to a front split body 30 ′, and a rear split body 30. And the front and rear splits 3
One end is fixed to the fixed frame 21 of the chassis 20 at a position between 0 'and 30 ". The other end is a connecting device 7 constituted by a joint link 73 connecting a long connecting rod 71 and a shot connecting rod 72.
It is preferred to use 0.

One end of the long connecting rod 71 is connected to the aforementioned crank plate 62 '.
On the side substantially opposite to the side where the hydraulic cylinder 61 is connected about 1 ', it is rotatably connected at a predetermined distance from the support shaft 11', and extends toward the rear divided body 30 ". By operating the rotating device 60, for example, FIG.
When the front divided body 30 'is rotated in the counterclockwise direction from the state shown in FIG. 6 to the state shown in FIG. 6, the position of the long connecting rod 71 is horizontally moved and becomes closer to the rear divided body 30 "side.

When the long connecting rod 71 moves rearward, the joint link 73 connected thereto rotates clockwise about an end portion rotatably fixed to the frame 21. The rotation of the joint link 73 again moves the shot connecting rod 72 connected thereto backward.

The direction in which the long connecting rod 71 is connected to the crank plate 62 'to the crank plate 62 "mounted so as to rotate integrally with the rear divided body 30" (the vertical center of the chassis in FIG. 5). (In a direction inclined to the left with respect to the left) relative to the support shaft 11 "at a predetermined distance, so that the rearward movement of the shot connecting rod 72 results in the rearward split body 30".
Is rotated synchronously with the front divided body 30 'in the counterclockwise direction, which is the same direction as the front divided body 30'.

At this time, the hydraulic cylinder of the tire rotation device 60 is adjusted in accordance with the radius of the concentric rotation movement determined for each crane and the specifications such as the distance between the front divided body 30 'and the rear divided body 30 ". 61 is a fulcrum connected to the crank plate 60 'and a length from the fulcrum to the support shaft 11';
A fulcrum at which the long connecting rod 71 is connected to the crank 62 "and a length between the fulcrum and the support shaft 11 ';
The length of the long connecting rod 71, the installation position and length of the joint link 73, the fulcrum at which the shot connecting rod 72 is connected to the crank plate 62 "and the length between the fulcrum and the support shaft 11" are appropriate. , The front split body 3 is adjusted to match the inherent concentric rotation radius of the crane 1 to which the traveling device 10 is applied.
0 'and the rear split 30 "can be rotated to different steering angles.

FIG. 6 shows a specific example in which the lengths and installation positions of the above members are adjusted so that the steering angles of the front divided body 30 'and the rear divided body 30 "for rotating the crane 1 concentrically become θ1 and θ2, respectively. This is an example in which the traveling device 10 is set according to such a steering angle setting.
Since all the tires are located perpendicular to the center of the concentric rotation trajectory of the crane 1, the inclination phenomenon in the axial direction of all the tires is completely eliminated. FIG.
If the tire rotating device 60 is further operated in the state of FIG.
As shown in the figure, the front divided body 30 'and the rear divided body 3
0 "is steered to a position rotated exactly 90 degrees from the forward / reverse traveling state of FIG. 5, and in such a state, the crane 1 can move laterally.

In order to move the crane 1 forward and backward, concentrically rotate, and move laterally, the front split body 30 'and the rear split body 30 "are used.
After setting at a predetermined steering angle, the tire must be fixed so that the steering angle of the tire does not change during traveling.
For this purpose, in the present invention, the steering angle fixing device 80 is installed on one of the divided bodies 30 'and 30 ". There is no particular limitation as long as the steering angle can be fixed. Preferably,
One of the divided bodies 30 ′ and 30 ″ (eg, front divided body: 3
In the rotating yoke 81 mounted so as to rotate integrally with the divided body 30 'at 0'), a number of grooves corresponding to the positions of the tire 40 corresponding to the forward and backward movement, the concentric rotational movement and the lateral movement of the crane 1 are provided. That is, a groove 82 for forward and backward movement, a groove 83 for concentric rotation and movement, and a groove 84 for lateral movement are respectively formed, and the fixed frame 21 of the chassis 20 adjacent to the rotating yoke 81 is formed.
In addition, a steering angle fixing device 80 provided with a fixing cylinder 85 which operates so as to be selectively engaged with the concave grooves 82, 83, 84 can be used. At this time, a fixed cylinder 8 is provided at the end of the fixed cylinder 85 on the rotating yoke 81 side.
A pin 86, which is actuated by 5 and selectively acts on the grooves 82, 83, 84, is mounted.

As a specific example of FIGS. 5 to 7, the number of components is reduced by using a crank plate 62 ″ to which a hydraulic cylinder 61 and a long connecting rod 71 are connected as a rotating yoke 81 of a steering angle fixing device 80. Although examples are shown, these can be formed by separate members.

In the traveling device 10 according to the present invention, the steering angle of the tire 40 is exactly 0 ° and the crane-specific concentric rotation angle θ1 when the crane 1 is moved forward, backward, concentrically, and laterally steered. And the tire rotating device 60 is precisely controlled to be adjusted to θ2 or 90 °, and at the same time when the steering angle of the tire 40 is adjusted to the angle, the steering angle fixing device 80 is steered as it is. A number of limit switches for controlling the operation of the steering angle fixing device 80 and the tire rotation device 60 at positions around the steering angle fixing device 80 and the front and rear splits 30 ′ and 30 ″ for timely fixing. (90 to 95) in FIG.
It is preferable to install as shown by a circle. For example, FIG.
As illustrated in FIG. 10 to FIG. 10, three limit switches 90, 9 are provided around a fixed cylinder 85 of the steering angle fixing device 80.
1, 92 can be installed at predetermined intervals.

Further, as shown in FIG.
Limit switches 93, 94, 95 for forward and backward movement, concentric rotation, and lateral movement are fixed up and down on the fixed frame 21 of the chassis 20 adjacent to the rear divided body 30 "rotating about 1". Limit switch 9
3, 94, 95 can be sequentially pressurized in accordance with the steering angle of the rear divided body 30 ".
0 ". These projections 93 ', 94', 95 'are provided with limit switches 93, 9
4, 95 are installed at predetermined intervals in the circumferential direction while providing a difference between the upper and lower levels so as to correspond to the difference in the vertical height.

Such limit switches (90 to 9)
According to the installation of 5), the steering angle fixing device 80 is engaged with the longitudinal groove 82 of the rotary yoke 81 and the tire 40 is engaged.
8 (i.e., the limit switches 90, 91, and 92 are not actuated by the pins 86 of the steering angle fixing device 80) in the state of FIG. If the operating lever is operated while the crane is rotating concentrically (in the state), the pin 86 of the fixed cylinder 85 moves backward. When the fixed cylinder 85 is moved backward, when the pin 86 of the fixed cylinder 85 reaches a position where the pin 86 engages with the concentric rotary movement concave groove 83, for example, as shown in FIG. 9, two limit switches 90 and 91 are operated. Stops when it reaches the position Therefore, the front split body 30 '
Can be steered until reaching the steering angle for concentric rotation.

When the reverse movement of the fixed cylinder 85 stops,
For example, after 1-2 seconds, the hydraulic cylinder 61 of the tire rotation device 60 starts to operate, and has been described with reference to FIGS.
The rotation of the front divided body 30 ', the operation of the connecting device 70, and the rotation of the rear divided body 30 "are sequentially performed. When the rotation of the rear divided body 30" reaches the angle for the concentric rotational movement, The concentric rotation movement limit switch 94 is formed by the concentric rotation movement protrusion 94 'shown in FIG.
Is operated, whereby the operation of the hydraulic cylinder 61 is stopped, and the steering for the concentric rotational movement is performed.

At this time, since the rotation of the front divided body 30 'is restricted by the pin 86 of the fixed cylinder 85 which has already been moved to the position where the concentric circular rotation groove 83 is engaged, the steering angle of the traveling device 10 is adjusted. Is firmly fixed at a concentric rotation angle of rotation. Thus, the steering of the traveling device 10 for the concentric rotation is completed. For reference, FIG. 10 shows a state in which the fixed cylinder 85 is completely separated from the concave groove of the rotating yoke 81 and the front divided body 30 'can rotate freely.

In the above, the adjustment of the steering angle of the traveling device 10 according to the present invention to the concentric rotation movement state in the forward / backward traveling state has been described. Naturally, the adjustment can be appropriately controlled by the same method.

The arrangement of the limit switches (90 to 95) and the operation thereof are described as an example, and the number, the arrangement position, the operation, and the like of the limit switches may be configured by another method. The tire rotation device 60 and the steering angle fixing device 80 are controlled so that the steering angle of the tire is accurately moved forward and backward, concentrically rotated and laterally moved, and the set steering angle is timely fixed. Can be properly controlled.

The mechanisms such as the driving device 50 described above, the hydraulic cylinder 61 of the tire rotation device 60, and the fixed cylinder 85 of the steering angle fixing device can be operated by adjusting levers installed in the driver's seat. , And a description thereof will be omitted.

According to the traveling apparatus of the transfer crane according to the present invention described above, the tire is driven by the traveling driving device, the tire rotating device, the connecting device, and the steering angle fixing device provided for each chassis. The crane can be moved forward, backward, and concentrically and rotationally without the phenomenon of axial tilting, and the effect of being able to firmly fix a state steered by forward, backward, laterally and concentrically rotating movements can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a configuration of a general transfer crane.

FIG. 2 is a schematic view of a chassis showing an example of a conventional traveling device applied to a transfer crane.

FIG. 3 is a schematic diagram of a chassis showing another example of a conventional traveling device to which a transfer crane is applied.

4 is a layout view of a chassis showing a problem of concentric rotation of the traveling device shown in FIG. 3;

FIG. 5 is a plan view showing a state in which tires are steered so that the crane can move forward and backward.

FIG. 6 is a plan view showing a state in which tires are steered so that the crane can rotate and move concentrically.

FIG. 7 is a plan view showing a state in which tires are steered so that the crane can move laterally.

FIG. 8 is a drawing in which a steering angle of a tire is fixed in a forward-reverse state.

FIG. 9 is a drawing in which a steering angle of a tire is fixed to a concentric rotation movement state.

FIG. 10 is a view showing a state in which the steering angle fixing device is released from the groove.

FIG. 11 is a view showing the operation of a limit switch installed on a rear split body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Traveling device 20 Undercarriage 30 Front / rear split body 40 Tire 50 Traveling drive device 60 Tire rotating device 61 Hydraulic cylinder 62 Crank plate 70 Connecting device 71 Long connecting rod 72 Shot connecting rod 73 Joint link 80 Steering angle fixing device 81 Rotating yoke 82 , 83, 84 Groove 85 Fixed cylinder 90-95 Limit switch

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) B66C 9/00 B66C 9/00 (72) Inventor Kim Gakuman Korea No.) Tokuyama APT 107 Building No. 1307 (72) Inventor Shira Narimori No.402-2 Kachivilla 402-2, Kami-villa, Gyeongsangnam-do, Gyeongsangnam-do, Republic of Korea F-term (Reference) 3D033 JA02 3D034 BB01 BB03 BB09 BC11 BC21 CA02 CB01 CB06 CB09 CC05 CC11 CC12 CC13 CC17 CE01 CE02 CE03 CE12 3D043 AA07 AB00 AB07 CB01 CB03 3F203 AA06 BA03 CA03 CC02 DA05 EB05 EB07

Claims (9)

[Claims] 1. A traveling device for a transfer crane including a plurality of chassis each having front and rear divisions on which tires are mounted, wherein at least one of the front and rear divisions 30 ′ and 30 ″ of each chassis 20 is rearward. Tire 4 mounted on split 30 "
Traveling drive device 50 for driving 0 "; one front split body 30 'of the front and rear split bodies 30' and 30" of each chassis 20;
A tire rotating device 60 for providing a steering force to the tire 40 'mounted thereon; the steering angle of the divided body 30' provided with the steering force and the steering of the other divided body 30 " The front and rear divisions 30 ′ and 30 ″ are arranged so that the direction angles are different from each other.
A connecting device 70 which is connected between the two to transmit the steering force of the divided body 30 'provided with the steering force to the other divided body 30 "; and the steering of the front and rear divided bodies 30', 30". Steering angle fixing device 80 for fixing an angle from a desired angle;
A traveling device for a transfer crane, comprising: 2. The traveling device for a transfer crane according to claim 1, wherein the tire rotation device 60 is a hydraulic cylinder 61. 3. The traveling drive device 50 includes a rear split body 30 ″.
The traveling device of a transfer crane according to claim 1, wherein the tire rotation device 60 and the steering angle fixing device 80 are installed in a front split body 30 '. 4. The steering angle fixing device 80 is mounted on one of the front and rear divisions 30 'and 30 "and is rotated integrally with the front division 30'. Tire 4 corresponding to forward / backward movement, lateral movement and concentric rotation
The rotating yoke 81 in which the concave grooves 82, 83, 84 are formed corresponding to the steering angle of 0, and selectively mesh with the concave grooves 82, 83, 84 to fix the steering state of the divided body 30 '. 2. A fixed cylinder 85 comprising:
The traveling device for a transfer crane according to item 1. 5. The fixed cylinder 85 is provided with the concave groove 82 corresponding to the fixed groove 85 when the divided body 30 'is steered to the forward / backward movement of the crane 1, the concentric rotation and the lateral movement. The traveling device for a transfer crane according to claim 4, wherein a plurality of limit switches (90, 91, 92) for stopping at positions meshing with each other are provided. 6. The front and rear divided body 30 'and the divided body 30 "
When the steering angle of the divided body 30 ′ is accurately steered to the forward / backward movement, the concentric rotation movement and the lateral movement position of the crane 1, the operation of the tire rotation device 60 is stopped. The traveling device of a transfer crane according to claim 1, wherein a plurality of limit switches (93, 94, 95) are provided. 7. The connecting device 70 includes one of the front and rear divisions 30 ′ and 30 ″, the front division 30 ′.
One end is fixed to the chassis 20 between the long connecting rod 71 connected to the other, the shot connecting rod 72 connected to the other divided body 30 ", and the front and rear divided bodies 30 ', 30". The traveling device of a transfer crane according to any one of claims 1 to 6, wherein the end includes a joint link (73) connected to the long connecting rod (71) and the shot connecting rod (72). 8. One end of each of the tire rotating device 60 and the long connecting rod 71 is connected to a crank plate 62 'installed to rotate integrally with the divided body 30', and the shot connecting rod 71 The traveling device for a transfer crane according to claim 7, wherein one end of the transfer crane 72 is connected to a crank plate 62 "installed so as to rotate integrally with the split body 30". 9. The rotary yoke 81 and the crank plate 6
The traveling device for a transfer crane according to claim 8, wherein 2 "is the same member.