JPH1087266A - Cargo handling vehicle with running device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a wheel capable of being brought up without each time setting up by bringing a jack carried when the wheel is replaced. SOLUTION: In a container crane 1 (cargo handling vehicle with running device), by providing a jack function in stopper devices 13a, 13b regulating a swivel amount of a frame 6, when a wheel 8 or 9 is replaced, without bringing a jack carried and set up, the wheel 8 or 9 can be brought up. In this way, the wheel 8 or 9 can be easily replaced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cargo handling vehicle with a traveling device such as a container crane and a trailer.

[0002]

2. Description of the Related Art Conventionally, as a cargo handling vehicle with a traveling device, for example, when a container is transported, a container crane has been used. That is, in FIG. 5, the container crane 1 includes a crane main body 2 and a plurality of traveling devices 3, and the crane main body 2 includes a portal-type vertical frame 30, a winding device 31, an operation unit 32, and the like. I have.
Further, the winding device 31 includes a winch 33 and a wire 3.
4, a lifting body 35, a hook 36, and the like.
The operator attaches the suspended container 37 attached to the elevating body 35 via the hook 36 to the operating unit 3.
It is possible to move the wire 34 of the winch 33 up and down by winding and unwinding the wire 34 from 2.

Each traveling device 3 has a mounting support 4 and a pin 5
, Frame 6, legs 7, wheels 8, 9 and stopper device 12
a and 12b. That is, the mounting support portion 4 is provided at four corners on the lower surface of the crane main body 2 with a downwardly projecting portion 4a. A pin 5 is rotatably provided in the protruding portion 4a, and a frame 6 is swingably provided about the pin 5 via the pin 5. Legs 7 extending downward in the vertical direction are attached to both ends of the frame 6, and wheels 8 and 9 are provided on the legs 7. Between the mounting support 4 and the frame 6, the upper inclined portions 6 a and 6 b of the frame 6
The stopper devices 12a and 12b provided respectively in
By contacting the lower surface 4b of the mounting support 4 on the lower surface 2a side of the crane body 2, the swing amount of the frame 6 is regulated.

[0004] According to such a conventional configuration, for example, when transporting the container 37 suspended from the elevating body 35, the traveling device 3 is moved to move the container 37 to the destination. At this time, the stopper device 12a or 12b is attached to the lower surface 4b
The frame 6 swings until it comes into contact with. The wheels 8 and 9 which are integral with the frame 6 also oscillate in the same manner and receive an equal contact pressure on each wheel in accordance with the gradient of the ground,
The container crane 1 can be moved efficiently. Furthermore, since the wheels 8 and 9 move according to the unevenness of the ground, the vibration received by the container 37 from the ground can be reduced.

[0005]

According to the conventional construction described above, for example, when the wheels 9 are replaced, a jack is installed between the lower surface 2a of the crane main body 2 and the ground and the lower surface 2a is pushed up, so that the crane main body 2 is raised. The traveling device 3, which is integral with the vehicle, is also pushed up from the ground so that the wheels 9 can be replaced. However, in the case of a vertically long container crane with a high center of gravity, there is a problem that one of the portals must be carefully pushed up with a jack, and the operation takes time. In addition, every time the wheels 8 or 9 are replaced, it takes time to carry and install the jack every time, and there is a problem that work efficiency is poor.

[0006] Therefore, an object of the present invention in claim 1 is to facilitate replacement of wheels.

[0007]

SUMMARY OF THE INVENTION In order to achieve this object, the present invention relates to a cargo handling vehicle with a traveling device having a plurality of traveling devices at a lower portion of a main body. A frame, a plurality of wheels attached to the frame, and a stopper device for restricting a swing amount of the frame by contacting the lower surface of the main body, wherein the stopper device has a jack function. Is what you do.

With such a configuration, when the jack is inactive, that is, during normal running other than when replacing wheels, for example, during normal running, the frame swings in accordance with the gradient and unevenness of the ground. Each wheel integrated with the frame also oscillates in a similar manner to cope with the gradient and unevenness of the ground.

When replacing the wheel, when the jack of one of the stopper devices is extended, the seat surface of the stopper portion first comes into contact with the lower surface of the mounting support portion. Further, when the jack of the stopper device is extended, the frame is tilted, and the frame is inclined until the other stopper portion on the side where the jack is not extended comes into contact with the lower surface of the mounting support portion. As a result, the wheel connected to the upper side of the slope is lifted, and the wheel can be easily replaced.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. In the following, the same components or substantially the same components as those of the above-described conventional configuration are denoted by the same reference numerals, and detailed description thereof will be omitted.

That is, 1 is a container crane (a cargo handling vehicle with a traveling device), 2 is a crane body, 2a is a lower surface of the crane body 2, 3 is a traveling device, 4 is a mounting support portion, 4a is a projecting portion of the mounting support portion 4, 4b is a lower surface of the mounting support portion 4, 5 is a pin, 6 is a frame, and 6a and 6b are frames 6.
, 7 are legs, and 8, 9 are wheels.

At this time, stopper devices 13a, 13b with jack functions are provided on the upper inclined portions 6a, 6b of the frame 6, respectively.
Is provided. The stopper devices 13a and 13b having a jack function include a cylinder tube 14, a flange portion 14a for holding the cylinder tube 14 after the cylinder tube 14 is fitted into the hole of the upper inclined portion 6a, and the piston 1
5 and a pressure oil port 16 provided on the side wall on the back side of the concave portion of the cylinder tube 14 for expanding and contracting the piston 15.
And a packing 17 provided on the sliding surface of the piston 15
And a spherical seat 1 provided at the rod-side tip of the piston 15
8 and stopper portions 19a and 19b.

The stopper 19 is freely mounted on the spherical seat 18 via a spherical bearing (not shown). Further, a hose 21 from a hydraulic pump 20 is configured to be freely connected to the pressure oil port 16.

The operation of the above embodiment will be described below. As shown in FIGS. 3 and 4, during normal use other than when replacing the wheels 8 or 9, the hydraulic oil port 16 of the stopper devices 13 a and 13 b with jack function and the hydraulic pump 20 are not connected. When the inside of the cylinder tube 14 is opened, the piston 15 is held in a contracted state. 3 and 4 show an embodiment in which the ground surface is horizontal, and both stopper portions 19a and 19b of the stopper devices 13a and 13b with jack functions are provided with gaps (between the lower surfaces 4b of the mounting support portions 4). (Not shown). From this state, the frame 6 swings until the stopper device 12a or 12b abuts on the lower surface 4b of the mounting support portion 4 in accordance with the inclination and unevenness of the ground. The wheels 8 and 9 integrated with the frame 6 also oscillate in the same manner, and receive an even contact pressure on the wheels 8 and 9 corresponding to the gradient of the ground, so that the container crane 1 can be moved efficiently. . Furthermore, each wheel 8, corresponding to the unevenness of the ground,
Since 9 moves, the vibration which container 37 receives from the ground can be reduced.

Next, for example, when replacing the wheel 9, as shown in FIG. 1, a hydraulic pump 20 is connected via a hose 21 to a pressure oil port 16 of a stopper device 13a having a jack function. In this state, as shown in FIG. 1 or FIG. 2, when the hydraulic pump 20 is operated to push out and extend the piston 15 of the stopper device 13a with a jack function, the seat surface 19c of the stopper portion 19a firstly becomes the lower surface of the mounting support portion 4. 4b. When the piston 15 of the stopper device 13a with the jack function is further extended, the frame 6
The frame 6 is tilted until the stopper 19b on the side where the piston 15 is not extended comes into contact with the lower surface 4b of the mounting support portion 4 while tilting. As a result, the wheels 9 connected to the upper side of the slope are lifted, so that the wheels 9 can be replaced without carrying and installing the jack between the lower surface 2a of the crane main body 2 and the ground. Accordingly, work efficiency is improved, and the wheels 9 can be easily replaced.

When the other wheel 8 is replaced, the pressure oil port 16 of the stopper device 13b with a jack function is replaced.
With the hydraulic pump 20 connected via a hose 21, the hydraulic pump 20 is operated to incline the frame 6 until the stopper 19a contacts the lower surface 4b, contrary to the above. As a result, the wheels 8 are lifted, so that the wheels 8 can be easily replaced.

In the above-described embodiment, the container crane 1 is shown as a cargo handling vehicle with a traveling device.
This may employ another vehicle such as a trailer. In the above embodiment, the stopper device 1 with the jack function is provided.
Although the hydraulic pumps 3a and 13b are operated by the hydraulic pump 20, other types such as a ball screw type may be adopted for the hydraulic pump 20.

[0018]

As described above, according to the first aspect of the present invention, the jack device is provided to the stopper device for regulating the swing amount of the frame, so that the jack is carried and installed every time the wheel is replaced. You can lift the wheels without. Thereby, the wheels can be easily replaced.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of the present invention, and is a part of a side view when a wheel of a cargo handling vehicle with a traveling device is replaced.

FIG. 2 is an enlarged sectional view of the stopper device with a jack function in FIG.

FIG. 3 is a diagram showing a use state of the traveling device.

FIG. 4 is an enlarged sectional view of the stopper device with a jack function in FIG. 3;

FIG. 5 is a side view of a cargo handling vehicle with a traveling device, showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container crane 2 Crane main body 2a Lower surface 3 Traveling device 6 Frame 8 Wheel 9 Wheel 13a Stopper device with jack function 13b Stopper device with jack function

Claims (1)

[Claims] 1. A cargo handling vehicle with a traveling device having a plurality of traveling devices at a lower portion of a main body, wherein each traveling device includes a frame provided at a lower portion of the main body so as to be swingable, and a plurality of wheels attached to the frame. A stopper device for restricting the amount of swing of the frame by contacting the lower surface of the main body, wherein the stopper device has a jacking function.