JP2546295Y2 - Post mounting structure for vehicle-mounted cranes - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted crane that can be mounted on a carrier such as a truck, and more particularly, to a mounting structure of a column for supporting an arm.

[0002]

2. Description of the Related Art In general, for delivery of electric appliances and transportation of agricultural products, these products are carried on a carrier of a small truck (light truck). However, at present, the work of placing or unloading these loads on the truck bed is dependent on human labor. It is conceivable to use a crane for the above-mentioned luggage lifting work,
Large cranes such as those used in construction sites cannot be used.

Therefore, a small crane that can be mounted on a truck bed is being developed. Such a small crane is fixed on the bed.

[0004]

[Problems to be Solved by the Invention] However, since the on-board crane is unnecessary when the work of loading and unloading luggage and the like to the vehicle is not performed, the presence of the on-board crane may hinder the loading and unloading work. is there.

[0005]

In order to solve the above-mentioned problems, a vehicle-mounted crane according to the present invention has a lower end and an upper end of a support column rotatably inserted into mounting holes formed in a lower support member and an upper support member. The length of the upper insertion portion of the support was longer than the length of the lower insertion portion.

[0006]

[Function] Since the length of the upper insertion portion of the column is longer than the length of the lower insertion portion, the lower insertion portion can be removed from the mounting hole of the lower support portion by lifting the column upward, and then the column is lowered. By pulling, the upper insertion part can be pulled out from the mounting hole of the upper support part and the column can be removed, and the column can be mounted by performing the reverse operation, so that the on-board crane can be simplified Can be attached and detached.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a perspective view showing a state where a vehicle-mounted crane to which the column mounting structure according to the present invention is applied is mounted on a light truck, and FIG. 2 is an overall view of the vehicle-mounted crane according to the present invention.

The on-vehicle crane mainly includes a column 1, a crane arm 2, a power unit 3, and a rope 4. The column 1 is provided above a pedestal 6, which is a lower support portion mounted on the bed S by bolts 5, and above the bed S. It is supported rotatably about a vertical axis between a bracket 8 which is an upper support provided at a torii 7 provided at the front of the loading platform S.

As shown in FIGS. 3 to 5, the column 1 has a small-diameter lower insertion portion 11 and an upper insertion portion 12 fixed to the lower end and the upper end of a main body 10 formed of a square pipe.
2 is longer than the length L1 of the lower insertion portion 11. The pedestal 6 is formed with a mounting hole 6a for inserting the lower insertion portion 11 of the column 1, and the bracket 8 is formed with a mounting hole 8a for inserting the upper insertion portion 12 of the column 1.
The lower insertion portion 11 inserted into the mounting hole 6a of the
The upper insertion portion 12 inserted into the mounting hole 8a of the bracket 8 with the stopper pin 14 and the washer 15 and the stopper pin 16
Each is prevented from slipping out.

The crane arm 2 is supported by a bracket 20 provided at the upper end of the column 1 via a shaft 21 so as to be swingable in a vertical plane. A bracket 22 is provided at the tip of the bracket 20, and a pulley 23 is mounted on the bracket 22. A rope 4 that is pivotally supported and fixed to a lower portion of the column 1 is hung over a pulley 23 and hangs downward, and a hook 24 is attached to a lower end of the rope 4 to catch a load.

The power unit 3 includes a motor, a hydraulic pump driven by the motor, a cylinder unit for supplying and discharging hydraulic oil from the hydraulic pump, a sub-tank for compensating for a piston rod of the cylinder unit to enter and exit, and a hydraulic oil flow path. The switching valve mechanism is integrated, and the base end of the cylinder unit is attached to a bracket 26 provided at the middle of the column 1, and the tip of the piston rod is attached to the crane arm 2.
Are rotatably connected to brackets 27 provided at the respective positions.

In the above description, when the load is to be placed on the carrier, the operator turns the crane arm 2 to the suspended position, and then drives the power unit 3 to cause the cylinder unit to perform a compression movement to move the crane arm 2 as shown in FIG. After the hook 24 at the tip of the rope 4 is hooked on the luggage, the power unit 3 is driven to extend the cylinder unit and the crane arm 2 is moved as shown by the one-dot chain line in FIG. Raise and rotate to the mounting position.

When the on-board crane becomes unnecessary, the washer 13 and the retaining pin 14 attached to the lower insertion portion 11 of the column 1 are removed, and the column 1 is lifted up. Since the length L2 of the upper insertion portion 12 is longer than the length L1 of the lower insertion portion 11, the lower insertion portion 11 is lifted up until it comes off from the mounting hole 6a of the pedestal 6, as shown in FIG. The lower insertion portion 11 of the support 1 can be removed from the pedestal 6.

After the lower insertion portion 11 of the column 1 is detached from the pedestal 6 in this manner, the washer 15 and the retaining pin 16 of the upper insertion portion 12 are removed (this may be done before the lower insertion portion 11 is removed). Good.), By pulling the support column 1 diagonally downward,
Since the upper insertion portion 12 comes out of the mounting hole 8a of the bracket 8, the column 1 can be removed from between the pedestal 6 and the bracket 8 as shown in FIG. This allows the entire crane to be removed from the vehicle.

When a vehicle-mounted crane becomes necessary, the upper insertion portion 12 of the column 1 is connected to the bracket 8
After the lower post 11 is inserted into the mounting hole 6a of the pedestal 6, the post 1 is inserted into the mounting hole 8a.
Can be mounted between the pedestal 6 and the bracket 8, so that the entire crane can be mounted on the vehicle.

[0016]

[Effects of the Invention] As described above, according to the present invention,
Since the lower end and the upper end of the support are rotatably inserted into the mounting holes formed in the lower support member and the upper support member, and the length of the upper insert portion of the support is longer than the length of the lower insert portion, so that it is easy to use. It can be attached to and detached from the vehicle, and can be removed from the vehicle when the crane is no longer needed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a vehicle-mounted crane to which a column mounting structure according to the present invention is applied, mounted on a light truck.

FIG. 2 is an overall view of a vehicle-mounted crane according to the present invention.

FIG. 3 is an enlarged front view of a main part of a column portion of the crane.

FIG. 4 is an explanatory view of a process of removing a column of the crane.

FIG. 5 is an explanatory view of a state in which a column of the crane is removed.

[Explanation of symbols]

1 ... prop, 2 ... crane arm, 3 ... power unit,
4 ... rope, 6 ... pedestal (lower bearing), 6a, 8a ... mounting hole, 7 ... torii, 8 ... bracket (upper bearing), 10 ...
Main body, 11 ... lower insertion part, 12 ... upper insertion part, 13, 15 ...
Washers, 14, 16 ... locking pins.

Claims (1)

(57) [Scope of request for utility model registration] 1. A support column rotatably supported about a vertical axis on a carrier of a vehicle, and a support member rotatably supported on an upper end portion of the support column in a vertical plane and hanging from a tip thereof. In a vehicle-mounted crane with an arm that performs
The lower end and the upper end of the support are rotatably inserted into mounting holes formed in the lower support member and the upper support member, and the length of the upper insert portion of the support is formed longer than the length of the lower insert portion. Mounting structure for the on-board crane.