JPH0580877U - Preventing forgetting to return the arm of an in-vehicle crane - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent forgetting to return the crane arm of the vehicle-mounted crane. [Structure] At the lower end side of a support column 1 rotatably supported on a loading platform S, an obstacle that interferes when the side swing plate 21 of the loading platform S is lifted when the crane arm 2 extends to the side of the vehicle body. A plate 22 is attached.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle-mounted crane that can be mounted on a loading platform such as a truck, and more particularly to a structure that prevents an operator from forgetting to return the arm due to carelessness.

[0002]

[Prior Art]

 For the delivery of electric appliances and the transportation of agricultural products, generally, these products are carried on the bed of a small truck (light truck). However, the present situation is that most of the work of loading and unloading these loads on the truck bed depends on manpower. It is possible to use a crane for the above-mentioned loading and unloading work, but it is not possible to use a large crane that is used at construction sites. Therefore, a small crane that can be mounted on the truck bed is being developed.

In such a small crane, an arm is attached to a support provided on a loading platform, and the support is rotatable so that the arm can swing up and down with respect to the support, or the support is fixed. In order to improve workability, it is necessary to allow the arm to rotate at least as a whole, regardless of whether the arm is rotatable and swingable with respect to the column.

[0004]

[Problems to be solved by the device]

 By the way, when the arm can be turned in this way, there is a risk that the operator may forget to store the arm in the luggage carrier after the work is finished and the arm may travel while protruding from the vehicle.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention is designed to lift the side swing plate of the loading platform to the lower end side of the support rotatably supported on the loading platform when the arm is protruding to the side of the vehicle body. A baffle that interferes with the board is provided.

[0006]

[Action]

 If the arm is protruding to the side of the vehicle body when the tilting plate on the side of the loading platform is raised, the tilting plate cannot be raised because it is hindered by the baffle plate provided on the lower end side of the column. You can prevent forgetting to return.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the accompanying drawings. Fig. 1 is a perspective view of a light truck equipped with an on-vehicle crane to which an arm return forgetting prevention structure according to the present invention is applied, Fig. 2 is an overall view of the crane, and Fig. 3 is a plan view of the light truck. FIG. 4 is an enlarged plan view of an essential part of FIG.

The vehicle-mounted crane is mainly composed of a support column 1, a crane arm 2, a power unit 3 and a rope 4, the support column 1 is made of a square pipe, and the lower end thereof is detachably mounted on a loading platform S by a bolt 5. A pedestal 6 is rotatably supported around a vertical axis, and an upper end thereof is detachably supported by a bracket 8 provided on a torii 7 provided at the front part of the loading platform S using bolts 9.

The crane arm 2 is swingably supported in a vertical plane via a shaft 11 on a bracket 10 provided on the upper end of the support column 1, and a bracket 12 is provided at the tip thereof, and a pulley 13 is attached to the bracket 12. A rope (including a wire and a chain) 4 having a base end fixed to the lower part of the column 1 is hung on the pulley 13 and hung downward, and a hook 14 for hooking luggage is attached to the lower end of the rope. There is.

Further, the power unit 3 is a motor, a hydraulic pump driven by the motor, a cylinder unit to which hydraulic oil is supplied and discharged from the hydraulic pump, a sub tank for compensating for the piston rod of the cylinder unit, and a hydraulic oil flow path. The valve mechanism for switching between the cylinder unit is rotatable, and the base end of the cylinder unit is freely rotatable to the bracket 16 provided at the middle of the column 1 and the tip of the piston rod is freely rotatable to the bracket 17 provided at the crane arm 2. Connected to.

Then, as shown in FIGS. 2 and 4, the lower end portion of the support column 1 interferes when the side swing plate 21 of the loading platform S is lifted when the crane arm 2 extends to the side of the vehicle body. The baffle plate 22 is attached.

[0012] In the above, when the luggage is placed on the loading platform, the operator turns the crane arm 2 to, for example, the hanging position shown by the solid line in Figs. 2 and 3, and then drives the power unit 3 to move it to the cylinder unit. The crane arm 2 is lowered by compressing it, and the hook 14 at the end of the rope 4 is hooked on the load. Then, the power unit 3 is driven to extend the cylinder unit and the crane arm 2 is lifted to the loading position.

After the work is finished in this way, if the crane arm 2 is forgotten to be returned to the inside of the vehicle body and the crane arm 2 is projected to the side of the vehicle body, the baffle plate 2 2 provided on the lower end side portion of the support column 1 As the side projecting plate 21 protrudes to the side of the loading platform S, when the side swinging plate 21 of the loading platform S is tried to be lifted as shown in FIG. It can be seen that the worker has forgotten to return the crane arm 2 because it will not rise.

Therefore, when the crane arm 2 is rotated and returned to the inside of the vehicle body as shown by the chain double-dashed line in FIG. 4, the support column 1 also integrally rotates and the baffle plate 22 returns to the inside of the luggage carrier S. , It becomes possible to raise the tilt plate 21.

[0015]

[Effect of the device]

 As described above, according to the present invention, when the side swing plate of the luggage platform is lifted when the arm is extended to the side of the vehicle body, on the lower end side portion of the column rotatably supported by the luggage platform. The baffle plate that interferes with the tilt plate prevents the operator from forgetting to return the crane arm due to carelessness.

[Brief description of drawings]

FIG. 1 is a perspective view of a light truck equipped with a vehicle-mounted crane to which an arm return forgetting prevention structure according to the present invention is applied.

[Fig. 2] Overall view of the crane

FIG. 3 is a plan view of the same light truck.

FIG. 4 is an enlarged plan view of an essential part of FIG.

[Explanation of symbols]

1 ... Prop, 2 ... Crane arm, 3 ... Power unit,
4 ... rope, 6 ... pedestal, 7 ... torii, 21 ... tilting board, 2
2 ... baffle board, S ... luggage carrier.

Claims (1)

[Scope of utility model registration request] 1. A support column rotatably supported on a loading platform of a vehicle about a vertical axis, and an upper end portion of the support column pivotably supported in a vertical plane and a lifting member hanging from a tip end thereof. In a vehicle-mounted crane equipped with
A vehicle-mounted crane characterized in that a baffle plate that interferes with the swing plate when the side swing plate of the loading platform is raised when the arm is protruding to the side of the vehicle body is provided at the lower end side of the column. No forgetting to return the arm.