JPH09188493A - Hydraulic piping device for cabin elevating hydraulic crane truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To interconnect the cabin of a cabin elevating hydraulic crane truck and a car body. SOLUTION: A cabin elevation type hydraulic crane truck is formed in such a manner that a hydraulic valve to perform control of hydraulic revolution of an upper revolving superstructure 2, control of hydraulic rise and fall of a crane, and control of hydraulic elevation of a cabin 3 is arranged on the upper revolving superstructure 2 revolvably mounted on a lower running body. In this case, a hydraulic valve for operation is arranged at the cabin 3. A flexible protection pipe 23 to contain a flexible type hydraulic pipe 22 to interconnect the hydraulic valve for operation and the hydraulic valve is disposed in the rear of the cabin 3. Further, the arrangement is effected inside the outer periphery of the upper revolving superstructure 2 and preferably formed in an inverted U-shape, as seen from the longitudinal direction, along the rear wall of the cabin 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic piping device for a cabin lifting hydraulic crane vehicle.

[0002]

2. Description of the Related Art A cabin lifting hydraulic crane is constructed such that a hydraulic swing control of the upper swing body, a hydraulic elevation control of a crane, and an upper swing body mounted on a lower traveling body so as to swing freely.
A hydraulic valve is provided for controlling hydraulic lifting of the cabin and for hydraulic traveling vehicles. Of these,
An example of a cabin lifting device is Japanese Patent Laid-Open No. 56-483.
The technique described in No. 93 is known.

That is, a scissors type lifting device is interposed between the upper swing body and the cabin, and the scissors mechanism is operated by the expansion and contraction of the hydraulic cylinder to raise and lower the cabin.

In such a cabin lift hydraulic crane vehicle, conventionally, the operating device provided in the cabin and the hydraulic valve are electrically connected, and the wiring is provided along the member of the scissor device.

[0005]

By the way, in such a cabin lifting hydraulic crane vehicle, an operation hydraulic valve is provided in the cabin in place of the electric operation device, and the operation hydraulic valve and the hydraulic valve are provided. Flexible hydraulic piping such as hydraulic pilot piping to be connected, similar to the above wiring,
When trying to install along the scissors device, the piping of the hydraulic pilot piping becomes complicated. In addition, when the scissors device is moved up and down, there is a risk that excessive bending will be applied to these flexible hydraulic pipes, the curvature will change at each elevating stage, and the flexible hydraulic pipes will be caught in the scissors device. It is difficult to ensure durability and durability.

In view of the above problems, the present invention provides a cabin lifting hydraulic crane vehicle in which a flexible hydraulic pipe connected to the operating hydraulic valve and the operating hydraulic valve is unreasonable. An object of the present invention is to provide a hydraulic piping device for a cabin lifting hydraulic crane vehicle that is not bent and can be compactly arranged (that is, comfortable turning is not hindered).

[0007]

[Means and Effects for Solving the Problems] In order to achieve the above object, a hydraulic swing control of an upper swing body and a hydraulic elevation control of a crane are performed on an upper swing body which is mounted on a lower traveling body so as to swing freely. And a cabin lifting hydraulic crane equipped with a hydraulic valve for controlling hydraulic lifting of the cabin, etc., a flexible hydraulic pipe for connecting the hydraulic valve for operation with the hydraulic valve for operation in the cabin A flexible protective tube for housing the above is disposed behind the cabin.

According to the structure of the first invention, the flexible hydraulic pipe for connecting the operating hydraulic valve and the hydraulic valve is housed in the flexible protective pipe, and the flexible protective pipe is arranged at the rear of the cabin. Therefore, when the cabin is raised or lowered, the flexible hydraulic pipe itself is not excessively bent and can be compactly arranged. That is, although the operation valve is usually provided in the cabin of the conventional hydraulic crane vehicle, it is possible to keep the operation valve without changing it to the electric machine control type.

A hydraulic piping system for a cabin lifting hydraulic crane vehicle according to a second aspect of the present invention is characterized in that, in the configuration of the first aspect, the flexible protection tube is arranged inside the outer periphery of the upper swing body.

According to the structure of the second invention, since the flexible protection tube does not protrude from the upper revolving body, the flexible protection tube does not come into contact with other articles even when the upper revolving body revolves. . Therefore, it is possible to prevent self-damage of the flexible protection tube and damage to other articles. That is, a comfortable turn can be performed.

In the hydraulic piping device for a cabin lifting hydraulic crane according to a third aspect of the present invention, in the configuration of the first aspect of the present invention, the flexible protective tube is arranged in an inverted U shape along the rear wall of the cabin when viewed from the front-rear direction. It is characterized by having done.

According to the structure of the third invention, the dimension of the flexible protection tube in the front-rear direction is reduced. Moreover, since the bending change of the flexible protection tube due to the raising and lowering of the cabin does not occur in the front-rear direction, the dimension of the flexible protection tube in the front-rear direction remains small regardless of whether the cabin is raised or lowered. Therefore, not only is the piping structure compact, but the flexible protective tube does not come into contact with other articles even when the upper revolving structure revolves, as in the second invention. Therefore, it is possible to prevent self-damage of the flexible protection tube and damage to other articles. That is, a comfortable turn can be performed.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an overall side view of an example rough terrain crane, and FIG. 2 is a plan view. An upper revolving structure 2 is rotatably mounted on the lower traveling structure 1, and a boom 5 of a crane is mounted on the left side of the upper revolving structure 2 in the drawing via a bracket 4 while the scissors type is mounted on the right side of the drawing. The cabin 3 is mounted via the lifting device 10 so as to be lifted and lowered. Therefore, during crane work, the cabin 3 can be raised as necessary as shown by the thin chain double-dashed line in FIG. 1 to improve the operator's field of view, thereby improving work efficiency and ensuring safety.

FIG. 3 is a side view of a scissor type lifting device 10, which includes a lower frame 11 fixedly mounted on the upper swing body 2, an upper frame 12 fixedly mounted on the bottom plate of the cabin 3, and a lower frame. 11, a first link 13 and a second link 14 connected to the upper frame 12, and a hydraulic cylinder 1 connected to the first link 13 and the second link 14.
5 is comprised.

Therefore, when the hydraulic cylinder 15 is extended,
The upper frame 12 rises as shown by the solid line in the figure, while when the hydraulic cylinder 15 is shortened, the upper frame 12 descends as shown by the thin chain double-dashed line in the figure. That is, the cabin 3 can be moved up and down by expanding and contracting the hydraulic cylinder 15.

FIG. 4 is a side view of the vicinity of the cabin of a cabin lifting hydraulic crane equipped with the hydraulic piping system according to the present invention, and FIG. 5 is a rear view taken along arrow A of FIG.
FIG. 5 is a cross-sectional view of the flexible protection tube. The cabin 3 is provided with operation valves (not shown) for operating the crane, operating the swing motor of the upper swing body, operating the lift of the cabin 3, and operating the travel motor of the traveling vehicle body 1. And each operation valve has a pilot pipe 2 consisting of an appropriate number of steel pipes.
0 is connected. On the other hand, in the upper revolving structure 2, various hydraulic valves (not shown) for driving the crane, driving the revolving motor of the upper revolving structure, driving the cabin 3 up and down, driving the traveling motor of the traveling vehicle body 1, etc. ) Are provided, and pilot pipes 21 made of the same number of steel pipes as the pilot pipes 20 are provided in each of these hydraulic valves. The pilot pipes 20 and 21 are connected to both ends of a flexible pilot pipe 22 (for example, a rubber hose) having the same number of flexible hydraulic pipes. These flexible pilot pipes 22 are, as shown in FIG.
3

The flexible protective tube is known by the trade names of cable bear, cable duct, runner flex and the like. That is, as shown in FIG. 5 and FIG. 6, the flexible protection tube is configured so that a plurality of rectangular tube members each having a pin connecting portion on the opposite surface are sequentially pin-connected to each other so that the flexible protective tube is flexible around the pin. It is a single-line tube that has sex. Such a flexible protection tube has both ends connected to two devices that are relatively movable over a predetermined distance, and accommodates an electric wire that is bridged between the two devices inside.

In the example machine, such a flexible protection tube 23 is
It is arranged behind the cabin 3, inside the outer periphery of the upper swing body 2 as shown in FIG. 4, and along the rear wall of the cabin 3 as shown in FIG. .

The details are as follows. The pilot pipe 21 is installed along the upper part of the bracket 4, and the bracket 4
Is connected to one end of a flexible pilot pipe 22 housed in a flexible protection pipe 23 having one end attached to the upper part of the. The flexible protection tube 23 has an inverted U-shape, the other end is attached near the floor surface 6 of the cabin 3, and the other end of the flexible pilot pipe 22 is connected to the pilot pipe 20, respectively. The pilot pipes 20, 21 may be flexible pipes, and the pilot pipes 20, 21, 22 connected to each other may be a single flexible pipe.

According to the above example, when the cabin 3 is lifted as indicated by the thin two-dot chain line, the flexible protection tube 23 changes its deformed position as the cabin 3 is lifted, and when the cabin 3 is lifted the most, it is shown in FIG. Although it becomes a thin two-dot chain line, the minimum bending radius R does not change during this period. Therefore, the flexible pilot pipe 22 is not excessively bent and is not damaged by being pinched by other members. Further, since one end of the flexible protection tube 23 is fixed to the upper portion of the bracket 4, the total length of the flexible protection tube 23 can be shortened.

The width B of the flexible protective tube 23 shown in FIG.
Is smaller than the outer width W of the inverted U-shaped flexible protection tube 23 shown in FIG. Since the flexible protection tube 23 is arranged in an inverted U-shape when viewed from the front-rear direction along the rear wall of the cabin 3 as described above, the dimension in the front-rear direction remains small at B even when the cabin 3 moves up and down. Therefore, the entire vehicle body can be made compact, and even if the upper swing body 2 turns, there is no risk of the flexible protection tube 23 coming into contact with other objects, and a comfortable turn can be performed.

Moreover, since the flexible protective tube 23 is arranged inside the outer periphery of the upper revolving superstructure 1, the flexible protective tube 23 is disposed in the upper revolving superstructure 2.
Therefore, the flexible protective tube 23 does not come into contact with other objects even when the upper revolving unit 2 revolves.
That is, it is possible to prevent self-damage of the flexible protection tube 23 and damage to other articles. Therefore, also by this, comfortable turning can be performed.

[Brief description of the drawings]

FIG. 1 is an overall side view of an example machine.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view showing a configuration of a cabin lifting device.

FIG. 4 is a side view of a cabin equipped with the hydraulic piping device of the present invention.

FIG. 5 is a rear view of FIG.

FIG. 6 is a cross-sectional view of a flexible protection tube.

[Explanation of Codes] 1 ... Lower traveling body, 2 ... Upper swing body, 3 ... Cabin, 4 ...
Brackets, 20, 21 ... Pilot piping, 22 ... Flexible pilot piping, 23 ... Flexible protection tubes.

Claims (3)

[Claims] 1. A cabin provided with a hydraulic valve for controlling hydraulic swing control of the upper swing body, hydraulic elevation control of the crane, hydraulic lift control of the cabin, and the like on an upper swing body which is rotatably mounted on a lower traveling body. In an elevating hydraulic crane vehicle, an operation hydraulic valve is provided in the cabin, and a flexible protective tube for accommodating the flexible hydraulic pipe connecting the operation hydraulic valve and the hydraulic valve is arranged at the rear of the cabin. A hydraulic piping device for a cabin lifting hydraulic crane that is installed. 2. The hydraulic piping device for a cabin lifting hydraulic crane vehicle according to claim 1, wherein a flexible protective tube is arranged inside the outer periphery of the upper swing body. apparatus. 3. The hydraulic piping device for a cabin lifting hydraulic crane vehicle according to claim 1, wherein the flexible protection tube is arranged in an inverted U shape along the rear wall of the cabin when viewed from the front-rear direction. Hydraulic piping equipment for a cabin lift hydraulic crane vehicle.