JPH0721496Y2 - Input mobile aerial work platform - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial field of application The present invention is an input mobile type aerial work in which a worker gets on and off when wiring or piping is performed on the ceiling inside a building after construction. Concerning the composition of the car.

(B) Conventional Technology Conventionally, a technology related to an input mobile aerial work vehicle using a scissor link mechanism has been known.

For example, it is like the technique described in Japanese Utility Model Laid-Open No. 60-154400 and Japanese Utility Model Laid-Open No. 63-31089.

However, in the conventional input mobile aerial work vehicle, since the operator who got down to the floor can move by pushing the machine, it did not have a mechanism to move the machine while on the workbench. Of.

(C) Problems to be Solved by the Invention The present invention provides an input mobile aerial work vehicle with an input handle provided on the workbench, and the operator rotates the input handle by the left and right arms to move downward. By rotating the driving theory of each separately, it is possible to run and steer.

And in such a configuration, if the input handle is rotated for each of the left and right, the force will not be applied, and if you get tired,
The left and right input handles are connected by a connecting rod so that the drive wheels can be integrally driven.

However, when the left and right input handles are connected and rotated by the connecting rod in this way, the left and right drive wheels rotate only in the same direction, so steering becomes impossible.

In order to solve this problem, the present invention removes the connecting rod, rotates the input handle specially, and after steering,
The connection rod is provided again with a mechanism for changing the phase of the input handle with respect to the sprocket shaft so as to connect the input handle at a phase-shifted position.

(D) Means for Solving the Problems The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

The scissors link mechanism S can be used to move up and down between the trolley 2 and the workbench 1, and the drive wheels 5L and 5R provided on the trolley 2 can be connected to the workbench 1
In an aerial work vehicle that can run and steer by special rotation of the input handles 3L and 3R arranged on the left and right, the left and right input handles 3L and 3R can be integrally connected by the connecting rod 40,
Furthermore, even if the input handles 3L and 3R do not match on the left and right,
The phase of one input handle 3 with respect to the sprocket shaft can be changed so that the connecting rod 40 can be connected.

(E) Embodiment The problems to be solved and the means for solving the present invention are as described above. Next, the structure of the embodiment shown in the accompanying drawings will be described.

The overall structure of the aerial work vehicle will be described with reference to FIGS. 1 and 2.

The workbench 1 is provided on the upper part, and the workbench 1 is composed of a step 10, a brake pedal 11, a handle base 18, and the like.

Input handles 3L and 3R are arranged on the left and right handle bases 18, and by rotating the input handles 3L and 3R, the drive wheels 5L and 5R are rotated via the chains 33, 24, 25, and 26. It is configured accordingly.

By changing the number of rotations of the input handles 3L and 3R,
The driving distances of the drive wheels 5L and 5R are different, and steering is performed.

Further, a hydraulic pump and a hydraulic pump pedal are provided above step 10, and an operator depresses the hydraulic pump pedal to expand and contract the lifting hydraulic cylinder 17 and expand and contract the scissor link mechanism S. There is.

The shock absorber 48 along the lifting hydraulic cylinder 17
When the workbench 1 is lowered, even if the pressure oil in the lifting hydraulic cylinder 17 suddenly escapes,
It is configured so that a sudden drop does not occur.

Drive wheels 5L and 5R and caster wheels 6L are provided on the lower part of the trolley 2.
6R and outrigger wheels 7L and 7R are arranged, and the outrigger wheels 7L and 7R are drilled from the outrigger frame 8.

In this embodiment, the scissor link mechanism S is configured in two stages, and is composed of an upper scissor link mechanism composed of links 13 and 14, and a lower scissor link mechanism composed of links 15 and 16.

Links 13 and 14 are pivotally connected by a pivot pin 30, link 14
The upper end of the sprocket is pivotally supported between the lower part of the handle base 18 and the sprocket pivot shaft 27. A roller 21 is provided at the upper end of the link 13, and the roller 21 is rotatable in the roller guide 19 back and forth.

The lower end of the link 13 is pivotally supported on the upper end of the link 16 by a pivot pin 31, and the lower end of the link 14 is pivotally supported on the upper end of the link 15 by a sprocket pivot shaft 28.

Also, the lower end of the link 16 is the roller 22 in the roller guide 20.
Is pivoted to.

Further, the lower end of the link 15 is pivotally supported by a sprocket pivot shaft 29, and is pivotally supported by the carriage 2 on the drive wheels 5L and 5R.

A chain 26 is wound between the sprocket pivot 29 and the drive wheels 5L and 5R.

Links 15 and 16 are pivotally supported by pivot pins 32.

An elevating hydraulic cylinder 17 is interposed between the links 13 and 16 in a dogleg shape, and a two-stage scissor link mechanism S performs elevating operation by expanding and contracting the one elevating hydraulic cylinder 17. Of. A shock absorber 48 is provided along the lifting hydraulic cylinder 17.

Further, between the step 10 and the trolley 2, an extendable ladder 4 which is extendable and retractable when the workbench 1 is moved up and down is interposed.

Further, a hook 9 is provided so as to protrude downward from substantially the center of the step 10, and the lower end of the hook 9 is configured to be engageable with an engaging rod 12 protruding upward from the carriage 2. .

The locking rod 12 pivots back and forth in conjunction with the pivoting of the outrigger frame 8 which pivotally supports the outrigger wheels 7L and 7R for the purpose of projecting and storing, so that the locking state with the hook 9 can be released. It is said that.

90 of the protruding position and the storage position of the outrigger frame 8
By the rotation, the connecting rod 35 detects its position and the locking rod 12
To rotate.

The outrigger frame 8 can be locked at the protruding position and the storage position by the outrigger locking rod 34.

Next, referring to FIG.

The input handles 3L and 3R are provided on the left and right inside the workbench 1, respectively. From the separate input handles 3L and 3R,
Chain drive tilts to the separate drive wheels 5L and 5R are arranged on both sides of the scissor link mechanism S.

The brake pedals 11 are also arranged on the left and right inside the workbench 1, and the handle bases 18 are also arranged on the left and right.

By the rotation of the input handles 3L and 3R, the chain 33 inside the handle base 18 is rotated, and the chain 33 is transmitted via the sprocket pivot shaft 27 to the chain 24 arranged along the side of the scissor link 14. To be done. The lower end of the chain 24 is a part of the sprocket pivot 28, and the scissor link 15
Is transmitted to the chain 25 along the side of the
The lower end of the sprocket is a part of the sprocket pivot 29, and power is transmitted to the chain 26.

The chains 24 and 25 and the chain case are arranged along the scissor links 14 and 15, and the lifting hydraulic cylinder 17 and the shock are placed between the chain and the scissor links 13 and 16 on the side where the chain case is not extended. The absorber 48 is installed.

Then, the lifting hydraulic cylinder 17 and the shock absorber 48
Rollers 21 and 22 are pivotally supported at the upper and lower ends of the scissor links 13 and 16 on the side where the
And is loosely fitted within 20.

Next, a description will be given with reference to FIGS. 4 and 5.

By providing the input handles 3L and 3R separately on the left and right, it is possible to steer the aircraft by rotating the drive wheels 5L and 5R separately for left and right, but they are connected to reduce the operating force. When the rod 40 is used to rotate the left and right input handles 3L and 3R in a coupled state, the steering that was conventionally possible is impossible.

In this case, the operator can operate the steering wheel by removing the connecting rod 40 and rotating the input handles 3L and 3R separately.

However, after the steering is finished, the positions of the left and right input handles 3L and 3R are different as shown in FIG. 5, and in this state, it becomes impossible to connect the connecting rod 40.

If the connecting rod 40 is returned from this state to the same phase state in which the connecting rod 40 can be inserted, the steering once performed becomes the original wood rod.

In this way, the present invention is constructed as shown in FIGS. 6, 7, and 8 so that the connecting rod 40 can be inserted after it is once steered.

That is, in the configuration of FIG. 6, the sprocket shaft 42 that supports the sprockets of the chain 33 is a spline shaft, and the spline cylinder 43 is also provided at the base of the input handles 3L and 3R.
Is configured.

With this configuration, the spline cylinder 43 of the input handles 3L and 3R is pulled out, the phase is changed with respect to the sprocket shaft 42, and then the spline cylinder 43 is inserted again. As shown by the chain line in FIG. 5, after steering, It is possible to match the phases of the left and right input handles 3L and 3R.

In FIGS. 7 and 8, a chrysanthemum seat 44 is provided on the sprocket shaft 42 side, and a chrysanthemum seat 45 is also provided on the input handle 3L and 3R side.
And the fastening bolts 46 for pressing the two chrysanthemum seats 44 and 45 are screwed.

With this configuration, the chrysanthemum seats 44 and 45 can be rotated by simply loosening the fastening bolt 46, and it is not necessary to completely remove the input handles 3L and 3R from the sprocket shaft 42. It was.

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

First, by connecting the input handles 3L and 3R separately configured on the left and right by the connecting rod 40, even a weak operator can rotate the input handles 3L and 3R with both hands,
It is possible to drive an input mobile aerial work vehicle in a labor-saving state.

Secondly, in the state of being connected by the connecting rod 40 in this way,
By turning the input handles 3L and 3R separately, the steering that was made possible becomes impossible, and when this steering is performed, it becomes impossible when the connecting rod 40 is inserted next time. By providing the phase changing mechanism between the sprocket shaft 42 and the input handle 3, steering is possible, and in the further steered state, the connection by the connecting rod 40 is possible again.

[Brief description of drawings]

FIG. 1 is an overall side view of a work platform 1 of an aerial work platform with the work platform 1 raised to the maximum, FIG. 2 is a general side view of the work platform 1 lowered to the lowest position, and FIG. Fig. 4 and Fig. 4 are front views of the left and right input handles 3L and 3R connected by a connecting rod 40, and Fig. 5 is an input handle after rotating one of them to steer.
FIG. 6 is a drawing showing a state in which the phase is changed with respect to the sprocket shaft in order to connect the 3L and 3R by the connecting rod 40. FIG. 6 is a perspective view of an embodiment in which the phase change mechanism with respect to the sprocket shaft is composed of a spline shaft and a cylinder. 7 and 8 are sectional views of an embodiment in which the phase changing mechanism is composed of a chrysanthemum, and FIG. 8 is a side view of the same. 1 …… Workbench 2 …… Truck 3L, 3R …… Input handle 4 …… Expansion ladder 40 …… Coupling rod 42 …… Sprocket shaft 43 …… Spline tube 44,45 …… Kikuza

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toru Sakai, 428 Enami, Okayama, Okayama Prefecture, Seirei Industry Co., Ltd. (72) Inventor, Katsumi Fujiki, 428, Enami, Okayama City, Okayama, Seirei Industry Co., Ltd. (72) Inventor Yuji Inoue 1-32 Chayamachi, Kita-ku, Osaka City, Osaka Prefecture Yanmar Diesel Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. Drive wheels 5L and 5R provided on the trolley 2 which can be moved up and down between the trolley 2 and the workbench 1 by a scissor link mechanism S.
In an aerial work vehicle that enables traveling and steering by rotating the input handles 3L and 3R separately arranged on the workbench 1.
The left and right input handles 3L and 3R can be integrally connected by the connecting rod 40, and even if the input handles 3L and 3R do not match on the left and right, the connecting rod 40 can be connected so that the sprocket shaft of one input handle 3 Input mobile aerial work vehicle characterized in that the phase can be changed.