JPH0721497Y2 - Input mobile aerial work platform - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial field of application The present invention is for the inside of a building after construction, when wiring or piping is performed on the ceiling, an operator gets on and off and rides on a workbench. The present invention relates to an input mobile aerial work vehicle that travels and steers according to input by rotating an input handle while being held.

(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, the operator who gets down to the floor can move by pushing the machine, so that the machine can be moved on the workbench or the workbench can be moved up and down. It had no mechanism.

(C) Problems to be solved by the present invention The present invention provides an input mobile type aerial work vehicle with an input handle provided on the workbench, and the operator separately rotates the input handle by the left and right arms, thereby scissors. Through the chain arranged along the link, the lower drive theory is rotated separately to enable traveling and steering.

Also, by stepping on the hydraulic pump pedal located on the workbench, an elevating hydraulic cylinder to which pressure oil is supplied is installed on one side of the scissor link, and the workbench can be operated by operator input while on the workbench. It is possible to rise.

In this way, the input handle provided on the workbench and the arrangement of the chain that connects between the drive wheels provided on the trolley, and the lifting hydraulic cylinder that expands and contracts by the hydraulic pump pedal provided on the workbench are connected to the opposite scissor link. By providing them on different sides, the structure of the input mobile type aerial work vehicle is simplified.

(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
The input handle 3L and 3R arranged on the upper side of the drive wheel 5L and 5R have scissors links 14 and 15 fixed to the upper part of the drive wheels 5L and 5R.・ Chains 24 and 25 that connect between 3R and drive wheels 5L and 5R are arranged, and a lifting hydraulic cylinder 17 is interposed between opposed scissor links 13 and 16.

(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.

Further, the 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 5L via the chains 33, 24, 25 and 26 arranged on the left and right. It is configured to rotate 5R.

By varying 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 (not shown), and when the operator depresses the hydraulic pump pedal, the lifting hydraulic cylinder 17 is expanded and contracted, and the scissor link mechanism S is expanded and contracted. Configured to do so.

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 scissor links 13 and 14, and a lower scissor link mechanism composed of scissor links 15 and 16.

The scissor links 13 and 14 are pivotally connected by a pivot pin 30,
The upper end of the scissor slink 14 is pivotally supported between the lower part of the handle base 18 and a sprocket pivot shaft 27.

A roller 21 is provided at the upper end of the scissor link 13, and the roller 21 is rotatable in the roller guide 19 back and forth.

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

The lower end of the scissor link 16 is pivotally supported by the roller 22 in the roller guide 20.

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

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

The scissor links 15 and 16 are pivotally supported by pivot pins 32.

Further, an elevating hydraulic cylinder 17 is interposed between the scissors links 13 and 16 in a dogleg shape, and the expansion and contraction of the one elevating hydraulic cylinder 17 causes the two-stage scissor slink mechanism S to move up and down. Do it. The lifting hydraulic cylinder
A shock absorber 48 is installed along the line 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
The interlocking rod 35 detects the position by the turning, and the locking rod 12
To rotate.

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

This will be described with reference 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,
The chain drive system leading to the separate drive wheels 5L and 5R is a "reverse" shaped scissor link in the scissor link mechanism S.
It is located on both sides of 14 and 15.

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 "upside down" scissor links 14 and 15, and the "U" shaped scissor links on the side where the chain and the chain case are not extended. A lifting hydraulic cylinder 17 and a shock absorber 48 are provided between 13 and 16.

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, the arrangement of the scissor link mechanism S and the drive chain will be described with reference to FIGS. 4 and 5.

The chains 24 and 25 are arranged outside the left and right scissors link mechanisms S, respectively.
The scissor links 14 and 15 in which the extension is provided are arranged outside the scissor links 13 and 16 in which the lifting hydraulic cylinder 17 and the shock absorber 48 are interposed.

The scissors links 13 and 16 on which the lifting hydraulic cylinder 17 and the shock absorber 48 are interposed have the rollers 21 and 22 pivotally supported at the upper and lower ends thereof, and the rollers 21 and 22 at the upper and lower ends thereof. , It slides back and forth inside the guide rails 19 and 20.

Conversely, scissor links 14 and 15 along which chains 24 and 25 are installed
Has its upper end pivotally supported on the work table 1 by a sprocket pivot shaft 27, and has its lower end pivotally supported on the carriage 2 by a sprocket pivot shaft 26, and this part is constructed so as not to move back and forth. Of.

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

First, the upper end is pivotally fixed to the workbench 1 by the sprocket pivot shaft 27, and the lower end is pivotally fixed to the carriage 2 by the sprocket pivot shaft 26.
Since the chains 24 and 25 are installed along the 15, the scissors links 14 and 15 are not the parts that slide back and forth inside the guide rails 19 and 20, so the fixed input handles 3L and 3R Power can now be transmitted between the drive wheels 5L and 5R.

Secondly, the lifting hydraulic cylinder 17 can be mounted on the "upside down" shaped scissor links 14 and 15 which are pivotally fixed to the front and rear by the sprocket pivots 27 and 26. On the outside of the scissor links 14 and 15, the chain 24
・ Since 25 is installed, by installing the lifting hydraulic cylinder 17 inside the scissor links 13 ・ 16, it is possible to reduce the overall height of the overall arrangement and lower the minimum height for lifting. Of.

[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. 3 is a front view of the state shown in FIG. 4 and 5 are side views showing the arrangement of the scissor link mechanism S, the chain and the lifting hydraulic cylinder 17, and FIG. 5 is a front sectional view showing the arrangement of the scissor link mechanism S and the chain on the same side. S …… Scissor link mechanism 1 …… Workbench 2 …… Truck 3L, 3R …… Input handle 13,16 …… “K” shaped scissor link 14,15 …… “Inverted” shaped scissor link 17 …… Lifting hydraulic cylinder 33,24,25,26 …… Chain 48 …… Shock absorber

Front page continued (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. Yuji, 1-32, Chayamachi, Kita-ku, Osaka, Osaka

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.
Drive wheels in a configuration in which the input handles 3L and 3R arranged on the workbench 1 can rotate and steer separately.
Scissors link 14/15 with pivot support fixed to the top of 5L / 5R
The chains 24 and 25 connecting between the input handles 3L and 3R and the drive wheels 5L and 5R are arranged along with, and the lifting hydraulic cylinder 17 is interposed between the opposite scissor links 13 and 16. Input mobile aerial work vehicle.