JPH0221508Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention is a vehicle-mounted crane mounted on the chassis of a vehicle, which is operated by an operating lever placed on the side of the vehicle. This invention relates to an operating device for a vehicle-mounted crane.

(Prior art) Conventionally, in vehicle-mounted cranes in which the crane is operated using an operating lever provided on the side of the vehicle, there are multiple (usually six) cranes for controlling the crane.
It is common practice to arrange hydraulic control valves vertically (up and down), and to operate these vertically arranged hydraulic control valves using six operation levers arranged vertically on the side of the vehicle. It was hot. However,
When the hydraulic control valves are arranged in the vertical direction in this way, there is a problem in that the operating levers are also arranged in the vertical direction, so that the operating levers tend to be positioned high, resulting in poor operability.

On the other hand, in order to improve the operability problem caused by the high position of the operating lever, hydraulic control valves 51A and 51B are installed as shown in FIG.
By arranging the control levers 52A, 52B in the horizontal direction (vehicle length direction), it is possible to arrange the control levers 52A, 52B in the horizontal direction, thereby lowering the position of the control levers and improving their operability. However, in this case, although the operability of the operating levers 52A, 52B... is improved, the operating levers 52A, 52B...
are arranged in the longitudinal direction of the vehicle, so when loading and unloading cargo onto the loading platform 42 using the crane 45, the worker 50 faces the vehicle 41 with only his face facing toward the loading platform 42. levers must be operated in an unnatural and tiring posture,
There were problems in that the workability was poor and the workers were highly fatigued.

(Purpose of the invention) The purpose of the present invention is to provide an operating device for a vehicle-mounted crane that allows crane operations to be performed with good work efficiency, in view of the problems described above with the operating device of a conventional vehicle-mounted crane. This was done as a.

(Structure of the invention) The operating device for a vehicle-mounted crane of the present invention operates a hydraulic crane mounted on the chassis of a vehicle by using a control valve equipped with a slidingly displaceable actuator to operate a control lever. The operating device for a vehicle-mounted crane is arranged along the width direction of the vehicle, and has a control valve that is arranged along the width direction of the vehicle so that its rotational motion can operate the actuator of the corresponding control valve. Consisting of a rotating rod connected in relation to each other, and a tilting rod having a grip portion at an appropriate position and capable of tilting in the longitudinal direction of the vehicle, and connected to the rotating rod such that the tilting rotation rotates the rotating rod. An operating lever is provided for each of the control valves, and each tilting lever of each operating lever is arranged in a row in the vehicle width direction on the side of the vehicle. It is.

(Embodiment) The operation device for a vehicle-mounted crane of the present invention will be described below based on an embodiment. In FIG. A hydraulically operated outrigger 6 consisting of an outer box 7 fixed on the chassis 4, 4 and an inner box 8 telescopically inserted into the outer box 7 is installed facing the vehicle width direction of the vehicle 1, A crane-equipped truck Z is shown in which a hydraulically operated telescoping boom type crane 5 is attached to the center in the vehicle width direction.

In this crane-equipped truck Z, the operating levers of the crane 5 and the outriggers 6 are centrally arranged on the side of the vehicle 1, so that a worker can operate the crane and the outriggers at the same time. ing.

This operating device will be explained below with reference to FIGS. 2 to 4.

The crane 5 and the outrigger 6 are provided with six hydraulic control valves 11A, 11B, 1 which are sequentially arranged laterally along the vehicle width direction on the outer box 7 of the outrigger 6.
Each actuator (spool) 20A, 20B, 20C, 20D, 20 of 1C, 11D, 11E, 11F
Operation levers 12A and 12B (E and 20F will be described later)
Various operations are performed by moving the crane 5 forward and backward as appropriate. There are two types of operations: the extension/retraction operation of the outriggers and the vertical movement of the jacks).

Each operating lever 12A, 12B... has the same structure, and this is the first operating lever 12A.
To explain, a pair of fixed supports 14, 14 protruding from both ends of the outer box 7 of the outrigger 6
A rotary rod 22A made of a round tube of an appropriate diameter is supported rotatably around its own axis along the direction of expansion and contraction of the outrigger 6, and a rectangular bar-shaped slide portion is inserted into the rotary rod 22A in a freely expandable and retractable manner. 123A
(See FIG. 4) and a pair of tilting rods 2 consisting of a round rod-shaped lever portion 223A that is continuous with the slide portion 123A and bent into an L-shape at an appropriate position.
It is composed of 3A and 23A. Note that the tip of the lever portion 223A is a grip portion 31A.
Further, the pair of tilting rods 23A, 23A are inserted into the rotating rod 22A from both ends of the rotating rod 22A, respectively, so that the levers can be operated from the right side or the left side of the vehicle 1.

The hydraulic control valve 11 is installed at a suitable position on the rotary rod 22A.
Rotating lever 21 that pin-engages with actuator 20A of A
A is provided protrudingly. Furthermore, a slide stopper nut 26 is screwed onto both ends of the rotary rod 22A, and an elastic body 27 is inserted between the slide lock nut 26 and the mouth end surface of the rotary rod 22A by screwing the slide stopper nut 26. is tightened and the elastic force of the elastic body 27 is actuated between the tilting rod 23A and the rotating rod 22A, thereby regulating the axial displacement of the slide bar 23A. Further, as shown in FIG. 4, locking bolts 28, 28 are attached to the rotating rod 22A on the inside of the slide locking nut 26 in the axial direction to restrict relative rotation between the rotating rod 22A and the tilting rod 23A. ing. Incidentally, the axial displacement of the rotating rod 22A is regulated by the engagement between a stopper 29A provided on the rotating rod 22A and the fixed support 14 in the axial direction of the rotating rod 22A.

Six operating levers 12 configured as described above
A, 12B... are hydraulic control valves 11A, 11 arranged in a row in the vehicle width direction as shown in FIGS. 2 and 3.
Each actuator 20 protrudes toward the vehicle compartment 3 side of B...
A, 20B... on the upper and lower sides of each actuator row (operating levers 12A, 12B,
12C is the upper side, operation levers 12D, 12E, 12
F is on the bottom) and there are three operating levers 12 each on the top and bottom.
A, 12B, 12C and 12D, 12E, 12F are arranged at appropriate distances from each other in the vehicle length direction.
When the operation levers 12A, 12B, . . . are installed, the respective tilting rods 23A, 23B, . It is rotatably supported around the Furthermore, when the operating levers 12A, 12B, . . . They are positioned so that they are arranged inside and close to each other (storage position).
Positioning of each operating lever 12A, 12B... to the storage position is performed using a stopper 24 provided on the tilting rod 23A, 23B... of each operating lever 12A, 12B...
A, 24B, . . . and the moving support 15 engage with each other in the direction of expansion and contraction.

Further, when the inner box 8 of the outrigger 6 is extended, the operating levers 12A, 12B... are moved from the storage position to the gripping portions 31A'', 3 in conjunction with the movement of the outrigger 6 to extend the inner box 8 of the outrigger 6.
1B''... are pulled out to the outside to a position where they are arranged outside the vehicle width line L as shown by the chain lines (extended position). In this extended position, the respective grip portions 31A'' of the operating levers 12A, 12B...
31B''... are close to each other and difficult to operate as in the storage position, so when actually performing crane work, each operating lever other than the first operating lever 12A must be moved as shown by the solid line in FIG. 12B, 12C... are each gripped by 31A,
31B...Pull out a fixed amount outward until the distance between them is such that it does not interfere with lever operation (working position).

Next, to briefly explain how to use this operating device and its function, when the vehicle 1 is stopped at a predetermined work position and crane work is performed, the operator stops the vehicle 1 and then starts the vehicle 1. Go to the operating lever placement part on the side and first extend the outrigger 6 by pressing the specified operating lever in the retracted position.
For example, the sixth operating lever 12 located on the outermost side
Do this by operating F. When the outriggers 6 are extended, each operating lever 12 is
A, 12B, . . . are pulled out integrally from the storage position to the extended position. Next, each of the operating levers 12A, 12B, . Next, the fifth operating lever 12E is operated to ground the jacking device (not shown) of the outrigger 6 (preparation for crane work is completed).

When preparations for crane work are completed, all that is left to do is move the first operating lever 12A for boom extension/retraction operation, the second operating lever 12B for boom hoisting operation, the third operating lever 12C for boom rotation operation, and the fourth operating lever for boom operation. A predetermined crane operation is performed by appropriately operating the four operating levers of the operating lever 12D.

At this time, since the hydraulic control valves 11A, 11B... are arranged in a row in the horizontal direction, each operating lever 12A, for operating the hydraulic control valves 11A, 11B...
12B... can be arranged in a row in the horizontal direction at a height position that makes it easy for the operator to perform the work. Therefore, crane operations or outrigger operations can be performed accurately and easily.
This will improve its operability.

Also, during work, each operating lever 12A, 12B...
is extended outward from the full width line L of the vehicle 1, and each of the gripping portions 31A, 31B, etc. are arranged in a row in the vehicle width direction, so that the operator can load and unload cargo as shown in Fig. 1. Each of the operating levers 12A, 12B, . . . can be operated while facing the rear side of the vehicle 1 (the side of the cargo platform 2) where the vehicle 1 is being operated. Therefore, the worker can perform the work accurately and safely while actually checking the work status of the crane work in a natural and comfortable posture without turning his head around greatly, which improves work efficiency during crane work. It turns out.

Furthermore, at the end of the crane work, after retracting the jacking device by operating the fifth operating lever 12E with each operating lever 12A, 12B... in the extended state, the sixth operating lever 12F is operated to keep the outrigger in the extended state. Store 6. next,
Each operation lever 12A, 12B... is pushed in from its extended position to the retracted position by releasing the corresponding slide locking nut 26, 26..., and then the respective slide locking nut 26, 26...
Then, each operating lever 12A, 12B, . . . is fixed again at its retracted position. With the above steps, storage of the operating device is completed, and the vehicle 1 is now ready to travel.

In this manner, in this operating device, each of the operating levers 12A, 12B, etc. is telescopic and can be set to the working position or storage position by extending or contracting them as appropriate, so preparations before and after crane work can be carried out. Work can be done easily and quickly.

Moreover, since the interlocking between each operating lever 12A, 12B... and each corresponding hydraulic control valve 11A, 11B... is performed by the rotation of each operating lever 12A, 12B... Regardless of the drawer position of 12A, 12B, etc., stable and light lever operation is always possible.

In the above embodiment, a so-called front-mounted vehicle-mounted crane was described in which the crane 5 was placed between the loading platform 2 and the operator's cab 3 of the vehicle 1. It can also be applied to a so-called rear-mounted vehicle-mounted crane placed on the rear side of the vehicle. (In this case,
The worker will work with his or her body facing the front side of the vehicle 1.

(Effect of the invention) According to the operating device for a vehicle-mounted crane of the present invention, the grip portions of each operating lever are arranged so as to be lined up in the horizontal direction on the side of the vehicle. When performing crane work, the worker can do the crane work with his or her body facing the length of the vehicle (toward the loading platform), which allows the worker to perform the crane work with his or her body facing the length of the vehicle (toward the loading platform). This dramatically improves work efficiency and reduces fatigue compared to when a person has to perform crane work in an unnatural position with his or her body facing the vehicle and only his or her head turned toward the loading platform. It has the effect of being

[Brief explanation of drawings]

FIG. 1 is a plan view of a crane-equipped vehicle equipped with a vehicle-mounted crane equipped with the operating device of the present invention, FIG. 2 is a view in the direction of the − arrow in FIG. 1, and FIG. 4 is a vertical sectional view taken from FIG. 2, and FIG. 5 is a plan view of a crane-equipped vehicle equipped with a conventional vehicle-mounted crane. 1... Vehicle, 2... Loading platform, 4... Chassis, 5
... Crane, 11A, 11B ... Hydraulic control valve,
12A, 12B...operation lever, 20A, 20B
... Actuator, 22A, 22B ... Rotating rod, 23
A, 23B...Tilt rod, 31A, 31B...Gripper.

Claims (1)

[Scope of utility model registration request] Control valves 11A, 1 equipped with actuators 20A, 20B, . . . that slide and displace the hydraulic crane 5 mounted on the chassis 4, 4, . . . of the vehicle 1
1B, . . . are operated by operating operating levers 12A, 12B, . ,11
Rotary rods 22A, 22B, . . . are connected in association with the corresponding control valves 11A, 11B, . . . so as to be able to operate actuators 20A, 20B, . A tilting rod 23 which is provided with... and is capable of tilting in the longitudinal direction of the vehicle and is connected to the rotary rods 22A, 22B, ... so that the tilting movement rotates the rotary rods 22A, 22B, ...
Operation levers 12A, 1 consisting of A, 23B, ...
2B,... are provided for each of the control valves 11A, 11B,..., and each of the operating levers 12A, 1
An operating device for a vehicle-mounted crane, characterized in that each of the tilting rods 23A, 23B, . . . 2B, .