JP2595400B2 - Retractable wheel crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel crane having a vehicle body with a bent structure.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 7, a truck crane 50 in which a crane body 53 provided with a retractable boom 52 on a swivel device 51 is mounted on a truck chassis 54 is used for cargo handling work. . Such a truck crane 50 has a truck chassis 54 attached to a traveling vehicle.
Is used, the length and width are substantially the same as the truck, and there is an advantage that the parking lot, the garage and the like can be shared with the truck.

However, in the truck crane 50, since the traveling vehicle is the truck chassis 54, the arrangement position of the outrigger 55 for the crane is restricted, and as shown in FIG.
At the time of unloading the cargo on the loading bed 61 of the truck 60, the outrigger 55 cannot be extended toward the truck 60 with the truck crane 50 approaching the side of the truck 60, and the lifting stability is deteriorated. However, there is a drawback that the lifting capacity is reduced and the vehicle easily falls over.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problem in a truck crane, and when an unloading operation of a load on a truck bed is carried out, the outrigger is brought close to the side of the truck. An object of the present invention is to provide a crane that can be extended to a predetermined width on a truck side, has good stability, has a large lifting capacity, and can prevent a fall accident.

[0005]

According to the present invention, there is provided a crane body in which a gate-shaped support frame is erected on an outrigger, and a boom is pivotally supported on the support frame. By mounting the vehicle on the rear body of a traveling vehicle of the vehicle body refraction type, a wheel crane of the vehicle body refraction type is configured to solve the above-mentioned problem. An outrigger or a liftable bucket can be provided at the front end of the front vehicle body.

[0006]

[Function] At the time of unloading and unloading luggage from the truck bed,
If the front body and the rear body are bent while the wheel crane is approaching the side of the truck, the outrigger can be extended toward the truck. Therefore, the stability is improved, the lifting capacity is increased, and a fall accident can be prevented.

[0007]

1 is a side view of a wheel crane of a vehicle body bending type according to an embodiment of the present invention, FIG. 2 is a rear view thereof, and FIG. 3 is a plan view showing a state where the vehicle body is bent. In the wheel crane 1 of the vehicle body refraction type of this embodiment, the front vehicle body 4 having the front wheels 2 and the rear vehicle body 5 having the rear wheels 3 are connected to each other by connecting pins 6 so as to be able to bend with each other to form a traveling vehicle 7. The crane body 13 is mounted on the rear body 5 of the traveling vehicle 7. On the rear body 5 of the traveling carriage 7, an engine room 8,
A radiator 9 is installed, and a driver's cab 10 of the traveling vehicle 7 is provided in front of the engine room 8. A locking bracket 11 for mounting the crane body 13 is fixedly provided on the rear end side surface of the rear vehicle body 5.

The crane body 13 is provided with a rear outrigger 14
And a supporting frame 15 fixed to the rear outrigger 14 and formed in a gate shape so as to be able to bridge on the radiator 9 of the rear body 5.
A pivot frame 21 provided on the support frame 15 so as to be pivotable by the pivot device 20;
And a telescoping boom 16 supported by an up-and-down cylinder 23 mounted between the pivoting frame 21 and the revolving frame 21. A mounting bracket 17 fixed to the front surface of the rear outrigger 14 is provided with a locking pin. At 18, it is attached to the locking bracket 11 of the rear body 5. The revolving frame 21 is provided with a winch 24, and a rope 25 of the winch 24 is suspended from a pulley 26 at the end of the telescopic boom 16 so that a hook 27 can be lifted and lowered. The hook 27 is provided with a known hook storage device 28 that is stored in parallel with the distal end of the telescopic boom 16 by winding the rope 25. Therefore, unlike the truck crane 50 in FIG. 7, it is not necessary to secure the hook 27 with the securing rope 56 during traveling, and if the telescopic boom 16 is turned and fixed so as to be located on the upper surface of the cab 10, traveling The cart 7 can be freely steered.

A front outrigger 30 is provided at the front end of the front body 4.
Is fixed. Outrigger beams 31 and 32 that extend and contract laterally are provided on the front outrigger 30 and the rear outrigger 14.
The outrigger beams 31 and 32 are provided with outrigger cylinders 33 and 34 which extend and contract vertically at the tips of the outrigger beams 31 and 32, respectively. 3
The wheels 3 and 34 are extended and grounded to stabilize the wheel crane 1.

FIG. 4 is a plan view showing a state in which the load of the wheel crane is suspended. The total length of the truck 60,
When the entire width is substantially the same as the overall length and the overall width of the wheel crane 1, when the wheel crane 1 approaches the truck 60 in a straight forward posture, the outrigger beams 31 and 32 on the truck 60 side can protrude laterally. There is no state. However, if the front vehicle body 4 and the rear vehicle body 5 of the traveling vehicle 7 are bent, the outrigger beams 31 and 32 can be extended laterally and extended. Therefore, the outrigger cylinders 33, 34
Is extended and grounded, the stability of the wheel crane 1 during the unloading operation of the load is ensured.

FIG. 5 is a side view of another embodiment, in which a bucket device 40 is provided in place of the front outrigger 30. The wheel crane 1 is capable of loading work such as earth and sand by the bucket device 40, and at the time of unloading work by the crane, extends the outrigger beam 32 of the rear outrigger 14 to extend the outrigger cylinder 34 to ground, and Stability is achieved by lowering the bucket device 40 to ground.

FIG. 6 is an explanatory view of a mounted state of a crane body of another embodiment. In this embodiment, the rear outrigger 14
So that the widening angle θ can be further increased.
A link 45 is interposed between the mounting bracket 17 and the mounting bracket 17, so that even when a load is lifted and unloaded to a long truck or the like,
The outrigger beam 32 can be extended to the track side.

[0013]

As described above, the wheel crane of the vehicle body refraction type according to the present invention is capable of moving the outrigger to the truck side while approaching the side of the truck at the time of unloading the cargo to the truck bed. A predetermined width can be extended, the stability is good, the lifting capacity is large, and a fall accident can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view of a body crane type wheel crane according to an embodiment of the present invention.

FIG. 2 is a rear view of the body crane type wheel crane.

FIG. 3 is a plan view of a vehicle body refraction type wheel crane.

FIG. 4 is a plan view showing a state in which a load is lifted by a wheel crane of a vehicle body bending type.

FIG. 5 is a side view of a vehicle body bending type wheel crane provided with a bucket device instead of the front outrigger.

FIG. 6 is an explanatory diagram of a mounting state of the crane main body.

FIG. 7 is a side view of a conventional truck crane.

FIG. 8 is a plan view showing a state in which a conventional truck crane unloads cargo.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wheel crane 4 Front body 5 Rear body 6 Connecting pin 7 Traveling trolley 13 Crane body 14 Rear outrigger 15 Support frame 16 Telescopic boom 20 Swivel device 21 Swivel frame 24 Winch 25 Rope 27 Hook 30 Front outrigger 40 Bucket device

Claims (3)

(57) [Claims] A crane body having a gate-shaped support frame erected on an outrigger and a boom supported on the support frame so that the boom can be swiveled. , A body crane wheel crane mounted on the rear body. 2. The wheel crane of claim 1, further comprising an outrigger at a front end of the front vehicle body. 3. The wheel crane of claim 1, further comprising a bucket movable up and down at a front end of the front vehicle body.