JP2511494Y2 - Aerial work vehicle - Google Patents

Description

[Detailed Description of the Invention] (b) Industrial field of application The present invention allows a worker to move and ascend and descend manually while performing indoor wiring and piping inside a building. Regarding aerial work vehicles.

(B) Conventional Technology Conventionally, a technology related to a manually driven aerial work vehicle has been known.

For example, JP-A-64-242049 and JP-A-62-1530.
This is like the technique described in Japanese Patent Publication No. 98 and Japanese Utility Model Publication No. 1-33594.

(C) Problems to be solved by the invention However, in the above-mentioned conventional technology, the steering by human power is
It is configured to move by the operator getting off and pushing the entire aerial work vehicle, and when gradually moving, when gradually doing wiring and piping work, run gradually. At that time, it is necessary to get off the aerial work vehicle each time, which is a troublesome work.

In order to solve the above-mentioned problems of the prior art, the present invention arranges steering handles for driving the left and right drive wheels on a workbench, and rotates the steering handles to move the steering wheels to the left and right. It enables steering and forward / backward travel.

(D) Means for Solving the Problem The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

A scissors link mechanism is interposed between the traveling table 7 and the work table 6, and the scissors link mechanism is expanded and contracted by the hydraulic pump 12 and the hydraulic cylinder 5 to move the work table 6 up and down. The left and right drive wheels 26L and 26R of the traveling platform 7 are configured to be driven to rotate separately by rotating the steering handles 9L and 9R of the steering handle 9L and 9R. And the pump pedal 10 for operating the hydraulic pump 12 is also arranged on the workbench 6.

(E) Embodiment The problems to be solved and the means for solving the present invention are as described above, and the means for solving the problems will be described below.

FIG. 1 is a side view of a lifted work vehicle equipped with a two-stage scissors link mechanism, FIG. 2 is a rear view of the same, and FIG. 3 is an enlarged side view of an interposed portion of a lifting hydraulic cylinder 5. FIG. 4 is also an enlarged front view.

The structure of an aerial work vehicle with a two-stage scissors link mechanism will be described.

A workbench 6 is provided on the upper part, and a hydraulic pump 12 is fixed to the upper surface of the workbench 6. A pump pedal 10 for operating the hydraulic pump 12 is arranged at a position where it is easy for an operator to depress. As shown in FIG. 2, the hydraulic pump 12 and the pump pedal 10 are arranged at the right end of the work table 6, and the brake pedal 11 and the brake lock lever 37 are arranged at the left end.

Further, a handrail frame 13 is provided so as to prevent the operator from dropping on the workbench 6, and the steering handle support base 30L is provided along the handrail frame 13 to the position of the operator's hand. , 30R are provided upright along the handrail frame 13.

 An extendable ladder 8 is provided below the handrail frame 13.

A sprocket shaft 22 and a chain 33 are installed inside the steering handle support bases 30L and 30R. The lower end of the chain 33 is wound around a sprocket on a link pivot shaft 23 that pivotally supports the work table 6 and the upper ends of the first links 1.

Below the platform 7, left and right drive wheels 26L, 26R and left and right driven wheels 2
7, 27 are bearing-supported, and outrigger wheels 19, 19 are arranged between the left and right drive wheels 26L, 26R and the left and right driven wheels 27, 27. The outrigger wheels 19 and 19 are the outrigger support rods 1.
It is supported by 8, 18 and is normally stored in a floating state inside the traveling platform 7. It is projected as a support part to prevent the aerial work vehicle from falling when working, and is grounded. is there.

A two-stage scissors link mechanism composed of second links 3 and 4 and first links 1 and 2 is interposed between the traveling platform 7 and the work platform 6.

The upper end of the first link 1 is pivotally supported on the worktable 6 by the link pivot shaft 23 as described above, and the roller 16 is supported on the upper end of the first link 2 by the upper roller rail 14 It moves back and forth inside.

A roller 17 is also bearing-supported at the lower end of the second link 3, and the roller 17 slides back and forth in the lower roller rail 15.

The lower end of the second link 4 has a link pivot shaft with respect to the traveling platform 7.
It is pivoted by 25.

The first link 1 and the first link 2 are pivotally supported by a pivot shaft 20 in a crossed state, and the second link 3 and the second link 4 are pivotally supported by a pivot shaft 24.

Further, the lower end of the first link 2 and the upper end of the second link 3 are pivotally supported by a pivot shaft 28, and the lower end of the first link 1 and the upper end of the second link 4 are pivotally supported by a pivot shaft 24.

In the above structure, the operator on the workbench 6 operates the steering handles 9L and 9R to rotate the link pivot shaft 23 from the sprocket of the sprocket shaft 22 via the chain 33, Driving the pivot shaft 24 from the pivot shaft 23 by the chain 34 in the chain case 31, through the chain in the chain case 32 from the pivot shaft 24,
Rotation is transmitted to the link pivot shaft 25, and the shaft 29 of the left and right drive wheels 26L, 26R is driven from the link pivot shaft 25 via the chain 36.

As shown in FIGS. 2 and 3, an upper support rod 38 is installed between the left and right first links 2, 2 and a lower support rod 39 is installed between the second links 3, 3.

A lifting hydraulic cylinder 5 is interposed between the upper supporting rod 38 and the lower supporting rod 39, and pressure oil is supplied to the lifting hydraulic cylinder 5 from a hydraulic pump 12 on a workbench 6. .

FIG. 5 is a side view of the aerial work vehicle equipped with the one-stage scissors link mechanism, and FIG. 6 is a rear view of the same.
FIG. 7 is a side view in a raised state, FIG. 8 is a rear view of the same, and FIG. 9 is an enlarged side view of the scissors link mechanism portion.

In FIGS. 5 to 8, since the work vehicle is a high place equipped with the one-stage scissors link mechanism, the method of hanging the chain and the way of interposing the lifting hydraulic cylinder 5 are different.

That is, only the first links 1 and 2 are provided, and the second links 3 and 4 therebelow are eliminated.

Therefore, the roller 16 is supported on the upper end of the first link 2,
The roller 16 is fitted in the upper roller rail 14, and the roller 17 is supported at the lower end of the first link 1, the roller 16 is fitted in the upper roller rail 14, and the roller 17 is fitted at the lower end of the first link 1. Bearings and the rollers 17 are fitted in the lower roller rails 15.

The upper support rod 38 of the lifting hydraulic cylinder 5 is installed below the first links 2 and 2, and the lower support rod 39 is installed below the traveling platform 7.

The lifting hydraulic cylinder 5 expands and contracts between the traveling platform 7 and the first link 2.

Further, the power transmission path by the chain from the steering handles 9L, 9R is the same from the chain 33 to the upper part of the chain 34, but when the chain 34 is extended as it is along the first link 1 to the lower end, the roller 17 Since it reaches the part of
Avoiding this, a sprocket is provided on the pivot shaft 20 so as to extend toward the left and right drive wheels 26L, 26R, and the chain 35 is arranged along the side of the first link 2 at that portion. -ing

Therefore, the chain case 31 and the chain case 32 are vertically separated at the pivot shaft 20.

Even in an aerial work vehicle equipped with the one-stage scissors link mechanism, the hydraulic pump 12 and the pump pedal 10 are arranged on the workbench 6, and the steering handle is arranged above the workbench 6.
9L and 9R are arranged so that the operator can move or lift the work platform while sitting on the workbench 6.

(F) Effect of the Invention Since the present invention is configured as described above, it has the following effects.

First, since the steering handles 9L, 9R and the pump pedal 10 are provided on the workbench 6, the operator can travel and ascend / descend an aerial work platform while the workbench 6 remains on the workbench. It became easy to adjust 6 to the required height.

Secondly, when it is necessary to gradually change the position and work, it is not necessary to get off and move the aerial work vehicle each time, so the work efficiency is improved.

Thirdly, when gradually moving while working, the hydraulic pump 12 and the pump pedal 10 are arranged on the workbench 6 even when avoiding obstacles such as beams on the ceiling. You can move up and down, and you can work on wiring and piping continuously.

Fourthly, the steering handles 9L and 9R can be used both as the traveling device and the steering device, and it is not necessary to separately arrange the traveling device and the steering device.

Fifth, when operating the steering handles 9L, 9R,
Since the steering handles 9L, 9R are arranged on the left and right corners of the front part of the workbench 6, the operator stands at the forefront of the workbench 6 and looks down at the lower part of the workbench. It is possible to visually recognize and avoid an object, and it is possible to reliably drive and steer manually.

[Brief description of drawings]

FIG. 1 is a side view of a lifted work vehicle equipped with a two-stage scissors link mechanism, FIG. 2 is a rear view of the same, and FIG. 3 is an enlarged side view of an interposed portion of a lifting hydraulic cylinder 5. FIG. 4 is an enlarged front view of the same, and FIG. 5 is a side view of the aerial work vehicle equipped with a one-stage scissors link mechanism in a lowered state.
FIG. 6 is a rear view of the same, FIG. 7 is a side view in a raised state, FIG. 8 is a rear view of the same, and FIG. 9 is an enlarged side view of the scissors link mechanism portion. 1,2 …… First link 3,4 …… Second link 5 …… Hydraulic cylinder 6 …… Workbench 7 …… Traveling platform 8 …… Extension ladder 9L, 9R …… Steering handle 10 …… Pump pedal 11 ...... Brake pedal 12 …… Hydraulic pump

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B66F 9/22 7515-3F B66F 9/22 V 11/04 7515-3F 11/04 G05G 1/14 G05G 1/14 (72) Inventor Toru Sakai 428, Enami, Okayama, Okayama Seirei Industrial Co., Ltd. (72) Inventor, Katsumi Fujiki, 428, Enami Okayama, Okayama Seirei Industrial Co., Ltd. (72 ) Inventor Yuji Inoue 1-32, Chayamachi, Kita-ku, Osaka City, Osaka Prefecture Yanmar Diesel Co., Ltd. (56) References JP 62-242049 (JP, A) JP 62-153098 (JP, A) Actual Kohei 1-333594 (JP, Y2)

Claims (1)

(57) [Scope of utility model registration request] 1. A scissors link mechanism is interposed between a traveling platform 7 and a work platform 6, and the scissors link mechanism is expanded and contracted by a hydraulic pump 12 and a hydraulic cylinder 5 to elevate and lower the work platform 6. The left and right steering wheels 26L, 26R of the traveling platform 7 are configured to be separately driven by rotation of the left and right steering handles 9L, 9R, and the steering handles 9L, 9R are mounted on the workbench 6. An aerial work vehicle, characterized in that the pump pedals 10 for operating the hydraulic pumps 12 are also arranged on the worktable 6 at the front left and right sides.