JPH11227578A - Outrigger operation device for working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a mis-operation and improve an operability by bending the tips of the manual operation levers of outrigger devices of respective right/left on the frontside/rearside of a car body to the frontside/rearside respectively and arranging respective operation knobs to the mutually non-interference position and the same position as a corresponding outrigger device under the slant operation state of respective levers. SOLUTION: The tips of manual operation levers 16b, 16c for drive-operating the outrigger devices 6b, 6c of the right/left of frontside are bent to the frontside and the tips of the manual operation levers 16a, 16d of the outrigger devices 6a, 6d of the right/left of rearside are bent to the rearside. Respective operation knobs 21b, 21c of the front operation lever are separatingly arranged to the frontside and rear respective operation knobs 21a, 21d to the rearside so as to be the same position as the installation positions of corresponding outrigger devices 6b, 6c, 6a, 6d. Respective manual operation levers are arranged to the front/rear interval in which the operation knobs are not interfered mutually under its slant operation state. By grasping the manual operation lever corresponding to the outrigger device visually, a mis-operation can be prevented and an operability can be improved without the interference of respective operation knobs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outrigger operating device for a working vehicle such as a crawler type crane equipped with an outrigger device.

[0002]

2. Description of the Related Art As a working vehicle equipped with an outrigger device, as shown in FIG. 2, a vehicle having a driver's seat 3 and a crane beam 4 on a vehicle body 2 movable by means of a crawler 1, 1 is provided. And a hydraulic cylinder drive type outrigger device 6a, 6b,
Crawler type crane with 6c and 6d is available.

Outrigger devices 6a, 6b, 6c and 6d used for the above-mentioned crawler-type crane are provided with four mounting brackets 7a and 7 which are horizontally rotatable at four front, rear, left and right sides of a vehicle body 2, respectively.
b, 7c, 7d, the base ends of telescopic arms 9a, 9b, 9c, 9d each having a leg plate 8a, 8b, 8c, 8d at the distal end are pivotally supported so as to be able to swing up and down. , 7b, 7c, 7d and hydraulic cylinders 10a, 10b, 10c between telescopic arms 9a, 9b, 9c, 9d
, 10d and the hydraulic cylinders 10a, 10b, 10c
, 10d by extending the extension arms 9a, 9b, 9c, 9
The vehicle body 2 is jacked up by rotating d downward.

The outrigger device 6a,
6b, 6c, and 6d, the telescopic arms 9a, 9b, 9c, and 9d are horizontally rotated so as to be radial in plan view as shown in FIG. Then, the hydraulic cylinders 10a, 10b, 10c, and 10d are driven to extend and the telescopic arms 9a, 9b, 9c, and 9d are rotated downward to jack up the vehicle body 2. ing. The outrigger devices 6a, 6b, 6c, and 6d allow the vehicle 2
Is a work state in which the crane operation can be performed by the crane device 5.

In order to move the vehicle body 2 from the working state, the hydraulic cylinders 10a, 10b, 10c and 10d are driven to contract to rotate the telescopic arms 9a, 9b, 9c and 9d upward. After that, the outriggers 6a, 6b, 6c, 6d are stored by horizontally turning the telescopic arms 9a, 9b, 9c, 9d to a position above the crawler 1, 1 along the side surface of the vehicle body 2. It is supposed to.

FIG. 3 shows a hydraulic circuit for driving and controlling the hydraulic cylinders 10a, 10b, 10c, 10d of the outrigger devices 6a, 6b, 6c, 6d. Four three-position hydraulic switching valves 13a, 13b, which are switched by tilting operation of the operation levers 12a, 12b, 12c, 12d,
The hydraulic cylinders 10a, 10b, 1 are controlled by switching between 13c and 13d.
0c, 10d, and each hydraulic cylinder 10a, 10b, 10c
, 10d are driven to expand and contract.

Each of the manually operated levers 12a, 12b, 12c,
As shown in FIG. 2, 12d is attached to an operation stand 14 arranged in front of the driver's seat 3 so as to be tiltable by a single pivot shaft 15. Each manual operation lever 12a, 12
b, 12c, 12d are provided from left to right for rear left outriggers, left front outriggers, right front outriggers, right rear outriggers in this order, and each of the manually operated levers 12a, 12b is provided.
, 12c, and 12d are tilted in the front-rear direction, so that the corresponding hydraulic switching valves 13a, 13b, 13c, and 13d are switched.

[0008]

However, the conventional outrigger operating device is provided with a manual operation lever 12a, 12b,
Since 12c and 12d are arranged side by side on a single pivot shaft 15, the correspondence between each manually operated lever 12a, 12b, 12c and 12d and the corresponding outrigger device 6a, 6b, 6c, 6d. However, there is a problem that it is difficult to understand and erroneous operation is easy.

Further, four manually operated levers 12a, 12b,
Since 12c and 12d are juxtaposed in the same direction, a wide installation space is required in the width direction. In particular, manual operation including the manual operation lever for operating the work machine (crane device 5) is required. In a crawler-type crane or the like that requires a lever to be provided, there has been a problem that the interval between the manually operated levers is narrowed and the operability is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has four manual operation levers for driving and operating an outrigger device arranged in the same positional relation as the corresponding outrigger device. Therefore, an outrigger operating device for a working vehicle that can visually recognize the correspondence between the two to prevent erroneous operation beforehand and improve the operability by increasing the interval between the manual operation levers as much as possible. It is intended to provide.

[0011]

The present invention has the following structure as means for solving the above-mentioned problems. That is, the outrigger operation device for a work vehicle according to the present invention is intended for a work vehicle having hydraulic cylinder drive-type outrigger devices attached to four front, rear, left, and right positions of a vehicle body on which a work machine is mounted.

Each outrigger device is driven and controlled by four hydraulic switching valves which are switched by tilting operation of four manually operated levers arranged in parallel on a single pivot shaft in both forward and reverse directions. It is configured.

The outrigger operating device for a working vehicle according to the present invention is characterized in that the front end portions of two manually operated levers for driving the left and right outrigger devices located in front of the vehicle body are bent forward, and the outrigger operating device is positioned rearward of the vehicle body. The distal ends of the two manual operation levers for driving and operating the left and right outrigger devices are bent backward, and the operation knobs of the manual operation levers do not interfere with each other when the operation levers are tilted. And are arranged so as to have the same positional relationship as the mounting position of the corresponding outrigger device.

In the outrigger operating device for a working vehicle according to the present invention thus configured, the distal ends of two manually operated levers for driving the left and right outrigger devices located in front of the vehicle body are bent forward, and The two manual operation levers for driving the left and right outrigger devices on the front side are driven rearward because the tips of the two manual operation levers for driving and operating the left and right outrigger devices located rearward are bent backward. Are located at the front position, and the operation knobs of the two manual operation levers for driving the outrigger device on the rear side are separated from each other at the rear position. For this reason, the mounting position of each outrigger device and the arrangement position of the operation knob of each manual operation lever for driving and operating the outrigger device have the same positional relationship, and the manually operated lever corresponding to each outrigger device can be visually grasped. Therefore, erroneous operation can be prevented beforehand.

Further, the operation knobs of the manual operation levers are arranged in a positional relationship such that the operation knobs do not interfere with each other when the operation levers are tilted, so that the operation knobs interfere with each other during operation and become inoperable. It cannot be.

Since the operation knobs of the four manually operated levers are separately arranged at the front position and the rear position by two, a conventional outrigger having four manually operated levers arranged in the same direction is provided. As compared with the operating device, the space in the width direction can be reduced, and the interval between the manually operated levers for operating the work machine can be widened accordingly, and the operability can be improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. The outrigger operating device for a working vehicle according to the present embodiment is applied to an outrigger device for a working vehicle as shown in FIG.
The basic structure of the work vehicle (crawler type crane) and the outrigger devices 6a, 6b, 6c, 6d shown in FIG. 1 and the hydraulic cylinders 10a, 10b, 10 of the outrigger devices 6a, 6b, 6c, 6d are shown.
The basic configuration of the hydraulic circuit that drives and controls c and 10d has been described in the section of the prior art, and will be referred to here.

The hydraulic switching valve 13a, 16b, 16c, 16d
a, 13b, 13c, 13d are four manual operation levers for switching operation. A single pivot shaft 17 is provided from left to right for left rear outrigger 16a, left front outrigger 16b, and right front outrigger.
16c and 16d for the right rear outrigger are arranged in this order.

Reference numeral 18 denotes a manual operation lever for operating the crane device 5, and each of the manual operation levers 16a and 16 for outriggers.
Together with b, 16c, and 16d, they are arranged side by side on the pivot shaft 17.

Each of the manually operated levers 16a, 16b, 16c,
The left and right outrigger devices 6b and 6c located in front of 16d
Manual operation levers 16b and 16c for driving the motor
Of the two manual operation levers 16a and 16d for driving the left and right outrigger devices 6a and 6d located rearward are bent rearward. For this reason, the left and right operation levers 16b bent forward,
The operation knobs 21b and 21c of the 16c are forwardly separated, and the operation knobs 21a and 21d of the left and right operation levers 16a and 16d bent rearward are spaced rearward. The front and rear operation knobs 21b and 21a located on the left side and the front and rear operation knobs 21c and 21d located on the right side are arranged so that the arrangement positions in the width direction are the same.

Therefore, the manual operation lever 16a for driving the left rear outrigger device 6a is moved to the left rear position.
The manual operation lever 16b for driving and operating the left front outrigger device 6b is located at the left front position,
The manual operation lever 16c for driving and operating the 6c is disposed at the right front position, and the manual operation lever 16d for driving and operating the right rear outrigger device 6d is disposed at the right rear position. This is the same positional relationship as the mounting positions of the devices 6a, 6b, 6c, 6d. As a result, the operator can visually grasp the manually operated levers 16a, 16b, 16c, 16d corresponding to the outrigger devices 6a, 6b, 6c, 6d, thereby preventing erroneous operation.

The left and right operation knobs 21b located in front are
, 21c and left and right operation knobs 21a, 21d
The operation knobs 21b, 21 located on the same side in a state in which the front manual operation levers 16b, 16c are tilted backward and the rear manual operation levers 16a, 16d are tilted forward.
a or the positional relationship such that the operation knobs 21c and 21d do not interfere with each other, that is, the positions of the front operation knobs 21b and 21c and the rear operation knobs 21a and 21d are determined by the respective manual operation levers.
Are arranged so that the operation knobs do not interfere with each other when tilted. For this reason,
During operation, the operation knobs 21a, 21d, 21c, 21b do not interfere and become inoperable.

The four manually operated levers 16a, 16b, 16b
The operation knobs 21a, 21d, 21c, and 21b of 16c and 16d are distributed at two positions in front and rear, respectively.
Compared with the conventional outrigger operating device in which the operation knobs of the manual operation lever are juxtaposed in the same direction, the arrangement space in the width direction can be reduced, and the manual operation lever 18 for operating the work machine is correspondingly reduced. Can be set wider, and operability can be improved.

The outrigger operating device for a work vehicle according to the present invention is provided with a leg plate at a lower end in addition to a swing type outrigger device for jacking up a vehicle body by rotating a telescopic arm downward by a hydraulic cylinder. Just below the hydraulic cylinder
Alternatively, the present invention can also be applied to a direct-acting type outrigger device that is configured to directly extend a vehicle body by extending obliquely downward.

[0025]

As described above, the outrigger operating device for a work vehicle according to the present invention is provided with the position of the manually operated lever for driving and operating the outrigger device attached to the front, rear, left and right positions of the vehicle body. Since it is arranged so as to have the same positional relationship as the mounting position, it is possible to visually grasp the manual operation lever corresponding to the outrigger device, to prevent erroneous operation beforehand, and to prevent the operation knobs from interfering during operation. Thus, the operation can be prevented from being disabled, and the interval between the manually operated levers for operating the work equipment arranged side by side can be set wider, so that the operability can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an outrigger operating device for a work vehicle according to the present invention.

FIG. 2 is an explanatory view of a conventional outrigger operating device for a work vehicle.

FIG. 3 is an explanatory diagram of a hydraulic circuit that drives and controls an outrigger device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1; Crawler, 2; Body, 3; Driver's seat, 4; Crane beam, 5; Crane device, 6a to 6d; Outrigger device, 7a
Mounting bracket, 8a to 8d; Leg plate, 9a to 9d; Telescopic arm, 10a to 10d; Hydraulic cylinder, 13a to 13d; Hydraulic switching valve, 16a to 16d; Manually operated lever, 17; , 21a
〜21d ； Operation knob

Claims (1)

[Claims] 1. Four hydraulic cylinder-driven outriggers mounted at front, rear, left and right positions of a vehicle body on which a working machine is mounted are provided with four manually operated levers provided side by side on a single pivot shaft. In the outrigger operating device of a work vehicle configured to be driven and controlled by a hydraulic switching valve that is switched by forward and reverse tilting operations, a tip of two manually operated levers for driving left and right outrigger devices located in front of the vehicle body. Of the two manual operation levers for driving the left and right outrigger devices located at the rear of the vehicle body, the front ends of the two manual operation levers are bent rearward, and the operation knobs of the respective manual operation levers are moved to the respective operation levers. The work vehicle is arranged so as not to interfere with each other in a state where the tilting operation is performed, and to have the same positional relationship as the mounting position of the corresponding outrigger device. Outrigger operation device.