JPH08282999A - Self-propelled load balancer - Google Patents

Abstract

PURPOSE: To safely perform work without causing unstability even when a heavy article is suspended by a load balancer and moved distant from a self-propelled carriage, in a self-propelled load balancer of mounting the load balancer on the self-propelled carriage. CONSTITUTION: In a self-propelled load balancer or mounting a support base 4 of a load balancer 3, provided with an article suspending fixture in a point end of a flexible arm 1, in a self-propelled carriage 5, outriggers 6 are provided in four corners of the support base 4, to constitute the self-propelled load balancer by extending/contracting each outrigger 6 by an individual electric motor 7. Further in this constitution, a current detecting means is provided in a control circuit of the electric motor 7 of driving extending/contracting the outrigger 6, to detect increase of a current value when the outrigger 6 is grounded/stored, so as to control the electric motor 7 stopped. The support base 4 of the load balancer 3 is made separable relating to the shelf-propelled carriage 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled load balancer in which a load balancer is mounted on a self-propelled carriage so that a heavy load can be easily moved using the load balancer while moving a work site. Regarding

[0002]

2. Description of the Related Art A self-propelled load balancer having a load balancer mounted on a self-propelled carriage is described in Japanese Patent Publication No. 6-59999 and Japanese Unexamined Patent Publication No. 6-127441. These self-propelled load balancers have the load balancer directly attached to the chassis.

[0003]

When a conventional self-propelled load balancer is moved to a work site, a heavy load is suspended by the load balancer and a moving work is performed while the traveling device such as a crawler traveling device is stopped. It has become. Therefore, when the moving heavy object is heavy or when the heavy object is moved to a position away from the chassis, the chassis becomes unstable. SUMMARY OF THE INVENTION An object of the present invention is to enable a heavy object that is heavier than before to be widely and stably moved to a position away from the chassis.

[0004]

According to the present invention, in a self-propelled load balancer in which a support stand 4 of a load balancer 3 provided with an article suspending tool 2 at the tip of a bendable arm 1 is mounted on a self-propelled carriage 5. Outriggers 6 are provided at the four corners of the support base 4, and each outrigger 6 is expanded and contracted by a separate electric motor 7.

[0005]

To use this self-propelled load balancer, first, the self-propelled carriage 5 is moved to the work site and moved, and at the work center position, the electric motor 7 is driven and the outrigger 6 is moved. Ground. In this state, the load balancer 3 is used to suspend a heavy object on the article suspending tool 2 for operation. Since the load balancer 3 has four corners of the support base 4 supported by the outriggers 6, it is possible to perform stable work even if a heavier load than the conventional one is moved to a position away from the self-propelled carriage 5. In addition, the current detection means 9 is provided in the control circuit 8 of the electric motor 7 that drives the expansion and contraction of the outrigger 6.
By detecting the increase in the current value when the outrigger 6 is housed and controlling the stop of the electric motor 7, the condition in which the outrigger 6 is grounded and the outrigger 6 is The electric motor 7 can be stopped by detecting the stored state, and even if there is unevenness on the ground, the outriggers 6 can be extended to the ground and the support base 4 can be reliably supported. Also, load balancer 3
If the support base 4 is separable from the self-propelled carriage 5, the self-propelled carriage 5 can be used for transportation work or the like while leaving the load balancer 3 at the work site.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. The self-propelled vehicle 5 includes a crawler traveling device 11, a box-shaped vehicle underframe 12 is internally provided with a motor, a motor, a battery, and the like, and a control platform 13 is provided upright on one side of a rear portion of the vehicle underframe 12. There is. The load balancer 3 is a self-propelled trolley 5.
The mounting base 16 is mounted via the horizontal device 15 on the support base 4 having the four corners fixed by bolts. A first arm 17 composed of a parallel link is provided obliquely upward from the mounting base 16, the second arm 18 is pivotally supported at the tip of the first arm 17, and the operation box 19 and the article suspension are provided at the tip of the second arm 18. The lowering tool 2 is provided.

On the support base 4 of the load balancer 3, outriggers 6 are provided at four corners in a diagonally downward direction so that the leg portions of the outriggers 6 can be expanded and contracted by an electric motor 7 attached to the head of each outrigger 6. There is. Outrigger 6
2, a square tube-shaped first leg 21 is fitted with a square tube-shaped second leg 22, and a nut 23 fixed to the second leg 22 is attached to a trapezoidal screw rod 24. The trapezoidal screw rod 24 is screwed from the 21 side, and the trapezoidal screw rod 24 is rotationally driven by the electric motor 7 so that the second leg 22 is moved in and out of the first leg 21.

A battery is mounted on the support base 4, and when the support base 4 is separated from the self-propelled carriage 5, the balancer 3 can be operated by the battery. Electric motor 7
The control of is performed by the central processing unit 25, as shown in the block diagram of FIG. A power ON / OFF signal is input from the key switch 26, a descent instruction signal of the outrigger 6 is input by the descent switch 27, and an ascending switch 28 is input.
By this, a rising instruction signal of the outrigger 6 is input. The rotation of the motor 7 is controlled via the main relay 31, the forward / reverse switching circuit 32, and the motor drive circuit 33. The current value flowing through the motor 7 is read from the current value detection circuit 9 into the central processing unit 25.

When the lower end of the second leg 22 is grounded or the second leg 22 is completely housed in the first leg 21, the electric motor 7 stops driving and the load current increases. The buzzer 34 is sounded and the drive of the motor 7 is stopped.

[Brief description of drawings]

FIG. 1 is a side view of a united body.

FIG. 2 is a partial side sectional view.

FIG. 3 is a control block diagram of an electric motor.

[Explanation of reference numerals] 1 arm 2 article hanging device 3 load balancer 4 support stand 5 self-propelled carriage 6 outrigger 7 electric motor 8 control circuit 9 current detection means (current detection circuit)

Claims (3)

[Claims] 1. A self-propelled load balancer in which a support stand (4) for a load balancer (3) having an article suspending tool (2) at the tip of a bendable arm (1) is mounted on a self-propelled carriage (5). At the four corners of the support base (4), the outriggers (6)
And a self-propelled load balancer in which each outrigger (6) is expanded and contracted by a separate electric motor (7). 2. A current detection means (9) in a control circuit (8) of an electric motor (7) for driving expansion and contraction of an outrigger (6).
The self-propelled load balancer according to claim 1, wherein the electric motor (7) is stopped by detecting a grounding of the outrigger (6) and an increase in current value when the outrigger (6) is housed. . 3. The self-propelled load balancer according to claim 1, wherein the support base (4) of the load balancer (3) is separable from the self-propelled carriage (5).