JPH0663590U - Lifting work vehicle - Google Patents

Abstract

(57) [Abstract] [Purpose] To enable a lifting table to be moved outward in the vehicle width direction with respect to a traveling carriage in a lifting work vehicle without impairing the stability of the traveling carriage. [Structure] In the lifting work vehicle 10, drive wheels 13 and 13 are provided on the left and right of a rear portion of a traveling carriage 11, and a lifting mast 12 is attached to a front portion of the traveling carriage 11. Also, the lifting mast 12
Two overhanging parts 1 that extend to the left and right at the bottom of the
8a, 18a and caster jacks 18 made up of caster wheels 18b, 18b attached to the respective tips of these overhangs are attached. And the lifting mast 1
2 is horizontally rotatable with respect to the traveling carriage 11 so that the lifting table 17 moves together with the caster jacks 18 outward in the vehicle width direction of the traveling carriage 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lifting work vehicle that is mainly used with a work vehicle at high places and assists work such as mounting heavy objects at high places.

[0002]

[Prior art]

 As shown in FIG. 4, the lifting work vehicle 40 includes a traveling carriage 41 and a lifting mast 42 that is vertically expandable and retractable so that the lifting table 47 can be moved up and down. Then, the lifting work vehicle 40 lifts a heavy object (such as an air conditioning unit) G placed on the lifting table 47 at the side of the aerial work vehicle 50. By using such a lifting work vehicle 40, the worker M who is on the work floor 51 of the aerial work vehicle 50 can easily attach the heavy object G to the indoor ceiling C. Here, as shown by the chain line in the figure, in the lifting work vehicle 40, if the lifting table 47 can be moved outward in the left-right direction (vehicle width direction) with respect to the traveling carriage 41, the left-right direction of the heavy load G It is convenient because the directional position can be easily adjusted.

[0003]

[Problems to be solved by the device]

 However, if the lifting table is moved outward in the vehicle width direction with respect to the lifting mast and the traveling carriage, the stability of the traveling carriage may be impaired due to the movement of the center of gravity of heavy objects.

The present invention has been made in view of such a problem, and the lifting table can be moved outward in the vehicle width direction with respect to the traveling carriage without impairing the stability of the traveling carriage. The purpose is to provide a lifting work vehicle.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the lifting work vehicle of the present invention is provided with driving wheels on the left and right of the rear part of the traveling trolley, and the lifting mast is attached to the front part of the traveling trolley. Also, on the lower part of the lifting mast, there are mounted two jacks that extend to the left and right and caster jacks consisting of caster wheels attached to each tip of these protrusions. The lifting mast is horizontally rotatable with respect to the traveling carriage so that the lifting table moves outward in the vehicle width direction of the traveling carriage together with the caster jack.

[0006]

[Action]

 In such a lifting work vehicle, the lifting mast is held toward the front of the vehicle body when the traveling carriage travels. As a result, the caster jack functions as the front wheels of the traveling carriage, and the traveling carriage can turn by giving a rotational difference to the left and right drive wheels. On the other hand, during lifting work (when the traveling carriage is stopped), the lifting table can be moved horizontally with respect to the traveling carriage by moving the lifting mast horizontally with respect to the traveling carriage. it can. At this time, the caster jack moves together with the lifting posts and the lifting table, and the caster wheels arranged outside in the moving direction move further outside the lifting table. Therefore, the stability of the traveling carriage in the vehicle width direction is secured.

[0007]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a lifting work vehicle 10 according to the present invention. The lifting work vehicle 10 includes a traveling carriage 11 and a lifting mast 12. The traveling carriage 11 is provided with drive wheels 13 and 13 on the left and right rear portions of the vehicle body. In addition to the drive devices 14 and 14 that drive the drive wheels 13, the traveling vehicle 11 also includes a battery 15 and a hydraulic pressure generator 16.

The elevating mast 12 is composed of an inner mast 12a and an outer mast 12b that receives the inner mast 12a, and is vertically telescopically expandable and contractible. The expansion / contraction operation of the lifting mast 12 is performed by using the hydraulic pressure generated by the hydraulic pressure generator 16. A lifting table 17 is horizontally attached to the upper part of the outer mast 12b. The upper surface of the lifting table 17 may be a turntable which can be horizontally swung around the center of the lifting table 17.

A caster jack 18 is attached to the lower end of the inner mast 12a. The caster jack 18 extends diagonally to the left and right, and has two protruding portions 18a, 18a reaching the front-side end portion of the traveling carriage 11 and a tip portion of each protruding portion 18a. It is composed of caster wheels 18b, 18b attached.

The ascending / descending mast 12 having the lifting table 17 and the caster jacks 18 is horizontally attached to the front part of the vehicle body of the traveling carriage 11 at the lower part of the inner mast 12a. . The horizontal swing operation of the lifting mast 12 is performed by a swing motor 19 built in the front part of the traveling carriage 11.

When the lifting work vehicle 10 (traveling vehicle 11) configured as described above is to be traveled, as shown in FIG. 2, the lifting mast 12 is held in a state in which it is directed forward. As a result, both caster wheels 18b, 18b of the caster jack 18 work as front wheels of the traveling carriage 11. That is, if both drive wheels 13 and 13 are rotated at a constant speed, both caster wheels 18b and 18b face the front-rear direction to allow the traveling carriage 10 to travel straight, and a difference in rotation between the drive wheels 13 and 13 is generated. If generated, both caster wheels 18b, 18b are oriented in the left-right direction to enable the traveling carriage 10 to turn.

On the other hand, when performing a lifting operation, the traveling carriage 11 is stopped, the elevating mast 12 is extended, and a heavy object (not shown) placed on the lifting table 17 is lifted. If necessary, as shown in FIG. 3, the lifting mast 12 can be swung horizontally with respect to the traveling carriage 11 and the lifting table 17 can be moved outward in the vehicle width direction of the traveling carriage 11. . At this time, the caster jacks 18 move together with the lifting table 17, and the caster wheels 18b (the upper ones in the figure) on the outer side in the moving direction move further below the lifting table 17 below the lifting table 17. Stick out. This ensures the stability of the traveling carriage 11 in the vehicle width direction. It goes without saying that the caster wheels 18b and 18b and the drive wheels 13 and 13 also ensure the stability of the traveling carriage 11 in the front-rear direction.

[0013]

[Effect of device]

 As described above, in the lifting work vehicle of the present invention, the elevating mast with the caster jack attached to the lower part thereof is horizontally rotatable with respect to the traveling carriage. Therefore, when the lifting mast is turned horizontally and the lifting table is moved outward in the vehicle width direction of the traveling carriage, the caster jacks also move in the same direction, and one caster wheel is lifted. Will be located further outside. Therefore, the stability of the traveling carriage can be reliably maintained. Therefore, by using this lifting work vehicle, the position of the lifting table can be moved outward in the vehicle width direction of the traveling carriage without impairing the stability of the traveling carriage, and work can be performed efficiently. When moving a lifting work vehicle, hold the lifting mast forward. As a result, the caster jack can be used as the front wheels of the traveling dolly and the vehicle can travel smoothly.

[Brief description of drawings]

FIG. 1 is a side view of a lifting work vehicle according to the present invention.

FIG. 2 is a plan view of the lifting work vehicle.

FIG. 3 is a plan view of the lifting work vehicle.

FIG. 4 is a rear view of a conventional lifting work vehicle.

[Explanation of symbols]

 10,40 Lifting work vehicle 11,41 Traveling trolley 12,42 Lifting mast 13 Drive wheel 17,47 Lifting table 18 Caster jack 18a Overhanging portion 18b Caster wheel 50 Aerial work vehicle

Claims (1)

[Scope of utility model registration request] 1. A traveling carriage having drive wheels on the left and right of a rear portion of a vehicle body, and an elevating mast attached to a front portion of the traveling carriage and vertically movable so as to vertically move a lifting table. A lifting work vehicle, comprising: a lower portion of the elevating mast, two caster portions extending to the left and right, and a caster jack including caster wheels attached to respective tip portions of the projecting portions. In the lifting mast, the lifting table is horizontally turnable with respect to the traveling carriage so that the lifting table moves outward in the vehicle width direction of the traveling carriage together with the caster jack. Lifting work vehicle.