JPH0249275Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a crane device having an outrigger in the longitudinally intermediate portion of a vehicle body equipped with an uneven terrain traveling device, and also extends the outrigger in the vertical direction. It is composed of a vertical extendable section in the form of a column that can be freely extended and retracted, and an inward and outward retractable section that moves the entire vertical extendable section in and out across the vehicle width and outside the vehicle width, and the vertical extendable section is in a grounded state. The present invention relates to an outrigger operating section of a crane-equipped transport vehicle, in which a swinging operating lever for extending and retracting between a raised and retracted state is disposed near the outrigger.

[Conventional technology]

Conventionally, in general, the vertically extendable part of the outrigger installed at the middle part in the longitudinal direction of a crane-equipped transport vehicle equipped with a multi-wheeled or crawler-type rough terrain traveling device with three or more wheels arranged on the left and right sides has not been used. It is configured to be stored within the vehicle width in order to reduce the width of the aircraft when not in use, and the operating lever for this vertical extendable part is arranged so that it can be operated regardless of the position of the vertical extendable part in the vehicle width direction. It had been.

[Problem that the invention attempts to solve]

However, if you use the control lever to swing the vertical extendable part in the direction of extending it without fully pulling it out of the vehicle width, the rough terrain traveling device will be located below the vertical extendable part within the vehicle width. There was a risk of erroneous operation in which the lower ends of the vertically telescoping contacts a part of the traveling device or the fuselage, causing damage to the traveling device or a part of the fuselage.

Therefore, in order to prevent the above-mentioned erroneous operation, we electrically detect the state of the vertical extension/contraction part protruding outside the vehicle width.
As an example of the outrigger erroneous operation prevention structure that opens and closes the hydraulic circuit for operating the vertically extendable part, the third
As shown in the figure, the limit switch 01 installed in the cylinder of the inward/extendable part 2B detects a sufficient pull-out operation of the vertical extendable part 2A of the outrigger 2 in the outward direction of the vehicle width. Based on this, it has been considered to provide an oil passage opening/closing solenoid valve 02 that opens the oil passage that supplies oil from the pump P to the cylinder for extending the vertical telescoping portion 2A via the three-position switching valve 03. The outrigger erroneous operation prevention structure using electrical detection has the disadvantage that the entire device becomes complicated, may cause failures, and is expensive.

In view of the above points, the present invention aims to avoid erroneous operations with a simple structure.

[Means for solving problems]

In the outrigger operation section of the crane-equipped transport vehicle according to the present invention, the outrigger is positioned within the vehicle width by the retracting operation of the inward/extendable section, and the storage position of the vertically extending/contracting section is as described above. so that the position overlaps with the extension operation range for the vertical extension/contraction part within the operation range of the operation lever,
It is characterized in that it is arranged at a position relative to the operating lever.

[Effect]

In other words, if you try to swing the control lever in the direction of extending the vertical extendable part without pulling it out sufficiently outside the vehicle width, the control lever will come into contact with the vertical extendable part and the operation will become impossible. do. but,
If the vertical extendable part is pulled out far enough outside the vehicle width, the vertical extendable part will move out of the swing range of the operating lever.
The operating lever can be freely swung without coming into contact with the vertically extending/contracting part.

[Effect of idea]

Therefore, (a) erroneous operation of the operating lever can be prevented simply by contacting the upper and lower extendable parts of the operating lever; therefore, the structure is simpler, less prone to failure, and less expensive than erroneous operation prevention control based on electrical detection. (b) Since erroneous operation can be reliably avoided, the aircraft can be used for a long time without damage.

〔Example〕

Next, an example will be shown based on FIGS. 1 and 2. Three or more wheels 6 are arranged in front and back on each of the left and right chain cases 5 to constitute an uneven terrain traveling device,
A vehicle body 1 equipped with this rough terrain traveling device is provided with a dump platform 9 that can freely swing up and down around a support shaft 8 by a hydraulic cylinder 7, and a crane device 3 is provided in front of the dump platform 9. A boarding and driving section 10 and a driving section 11 are arranged side by side in front of the crane device 3, thereby forming a crane-equipped transport vehicle suitable for wetlands and rough terrain.

In the crane device 3, a boom 3b that can extend to the rear of the dump platform 9 is attached to a support 3a that is hydraulically driven and rotatable around the vertical axis so that it can swing up and down and expand and contract using hydraulic pressure.
Hook 3 that can be raised and lowered by winding and unwinding c.
d is connected to the tip of the boom 3b, and the outrigger 2
are arranged on the left and right sides of the support column 3a, respectively, and various hydraulic actuators can be selectively operated by a group of operating levers A. As shown in FIGS. 1 and 2, the outrigger 2 includes a column-shaped vertically extendable part 2A that can be extended and contracted between the ground contact state and the raised and retracted state by hydraulic pressure, and this vertically extendable part 2A in the lateral direction of the vehicle body. It is comprised of an inward/outward retractable part 2B that can freely move in and out within and outside the vehicle width.

The operating lever 4 for telescopically operating the vertical telescoping section 2A in the operating lever group A is mounted so as to be swingable around a pivot shaft 12 near the vertical telescoping section 2A, and is connected to the tip of the operating lever 4 for operation. Valve 1
3 is configured to be operated by switching. If the operating lever 4 attempts to swing in the direction of extending the vertical telescoping portion 2A when the vertical telescoping portion 2A is located within the width of the vehicle, it will come into contact with the vertical telescoping portion 2A, making the operation impossible. operation lever 4.
The upper and lower extendable parts 2A are arranged relative to each other.

In other words, if the vertical extendable part 2A is pulled out to the outside of the vehicle width, the vertical extendable part 2A will be out of the swing range of the operating lever 4.
It is configured so that it is located.

[Another example]

Note that the rough terrain traveling device may be of a crawler type in addition to the multi-wheel type described above.

[Brief explanation of the drawing]

The drawings show an embodiment of the outrigger operating section of the crane-equipped transport vehicle according to the present invention, in which FIG. 1 is a plan view of the main part, FIG. 2 is an overall side view, and FIG. 3 is a hydraulic circuit diagram of a conventional example. DESCRIPTION OF SYMBOLS 1...Vehicle body, 2...Outrigger, 2A...Vertical extension/contraction part, 2B...Inward/extendable part, 3...Crane device, 4...Swing operation lever.

Claims (1)

[Scope of utility model registration request] A crane device 3 having an outrigger 2 at an intermediate portion in the longitudinal direction of a vehicle body 1 equipped with a traveling device for rough terrain.
In addition, the outrigger 2 is provided with a column-shaped vertically extendable part 2A that can be extended and contracted in the vertical direction, and an inward and outward retractable part that moves the entire vertically extendible part 2A in and out within and outside the vehicle width. 2B, and a swing operating lever 4 for extending and contracting the vertically extendable part 2A between a grounded state and a raised storage state is disposed near the outrigger 2. , the retracted position of the vertically extending/contracting part 2A, in which the outrigger 2 is positioned within the vehicle width by the retracting operation of the inward/extending part 2B, is within the operation range of the operating lever 4;
An outrigger operating section for a carrier with a crane, characterized in that the outrigger operating section for a carrier with a crane is arranged so as to be positioned relative to the operating lever 4 such that it overlaps with an extension operating range for the vertically extending/contracting section 2A.