JPS59133198A - Lifting gear for height service car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a lifting device for an aerial work vehicle.

2. Description of the Related Art Generally, it is known that a lifting device is provided near the workbench in an aerial work vehicle having a workbench installed at the tip of the boom. For example, the author previously published Japanese Patent Application No. 54-77392 (Japanese Unexamined Patent Publication No. 56-3289), in which the center of rotation of the swivel table and the center of rotation of the lifting device are arranged on the same axis. The application was filed for a lifting device for a working vehicle, but in such a conventional technique, there is a first operation part that secures the lifting device N and the work platform, and a lifting device and a boom when traveling. This was complicated because each operation part had to be operated in response to each task.

That is, during lifting work using the lifting device, first operate the second operating section to release the lashing of the boom from the lifting device, and then rotate the work platform by selectively operating the first operating section. The machine (I9) is used to rotate the workbench independently or to rotate the workbench and the lifting device simultaneously, and the IR for operability (1) is placed near the narrow work platform. In addition to being embarrassing, there is a risk of injury to the 8A device due to incorrect operation.

The present invention has been made in view of the above-mentioned drawbacks, and allows the workbench to be rotated independently and suspended by a single lever operation.
The present invention is constructed so that simultaneous rotation of the device or the traveling and retracting posture can be selected, thereby improving workability.Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a swivel base 6 is mounted on the body 2 of the aerial work vehicle 1 so that it can be rotated, and the base end of a boom 4 is pivoted to the upper end of the swivel base 6 so that it can be raised and lowered. ing.

The boom 4 has a luffing angle controlled by a luffing cylinder 5 disposed between it and the swivel base 6, and is provided in a multi-stage telescoping type whose length is variable. A C workbench 6 is attached via the.

That is, a hollow shaft 7 is rotatably pivoted 7b to the tip of the tip boom 4pt via its bracket 7a,
Furthermore, interlocking cylinders 8 and 9 are provided between the arm 7c and the tip boom 4a, and between the swivel base 6 and the boom 4, so that the hollow shaft 7 always maintains a vertical state in response to the up-and-down movement of the boom 4. It is composed of

Therefore, the stay 6a is fixed to the Sakumadai Otsu.

6a is pivotally mounted around the hollow ii+i+ 7, so that the workbench 6 always maintains a horizontal state.

In the embodiment, the pivot portion 7b between the tip boom 4a and the hollow shaft 7
is arranged at an offset position via the bracket 7a, but the tip of the tip boom 4a is formed into a bifurcated shape, and is pivoted so as to directly clamp the hollow shaft 7, and its pivot M 5VS
The axial center of the hollow shaft 7b may be located so as to intersect with the axial center of the hollow shaft 7.

By the way, in the vicinity of the workbench 6, that is, on the hollow shaft Z, a lifting device 1 consisting of a swinging post 10, a undulating bracket 11, and a working boom 12 is provided.

As shown in Figure 1-12, this suspension 1 device 16 consists of a swinging post 1 fixed integrally with a second hollow shaft 10a disposed in the S mud hollow shaft 7 so as to be freely movable.
0 is rotatably erected on the hollow shaft Z, and a undulating bracket 11 is attached to the upper end of the pivot post 10.
14, this undulating bracket 1 is rotatably pivoted.
A working boom 12 is movably inserted into the upper part of 1,
At the tip of the working boom 12, there is a door 12a connected to the working boom.
becomes fixed.

Rotation of the undulating bracket 11, that is, the working boom 1
The up-and-down motion of No. 2 is caused by the bottle hole 15 provided in the turning boss) 10.
and 1' to the undulation bracket 11! Ill! It can be changed by selecting the provided bin holes 16 and locking them with the bins 17. Also, the work boom 12 can be slid and the bins arranged at regular intervals on the work boom 12 can be changed. This can be changed by selecting the hole 1B as the bottle hole 19 of the undulating bracket 11 and locking the bottle 20 therein.

On the other hand, the wire 22 fed out from the winch device R21 mounted on the workbench 6 side is connected to the winch bracket) 21a.
After being introduced into the hollow shaft Z via a pulley 26 pivotally connected to the shaft, it extends upward and is guided out to the lifting device 16 side, and then to the guide pulley 24 pivotally connected to the pivot ll1l1114 and the working boom. A pulley 25 provided on the ladder 12a is suspended, and a hook 26 is fixed to the tip.

In addition, 27 is workbench 6 +11! A rotating @ mechanism such as a rotating motor provided in l, and teeth JI fixed to a hollow shaft 7.
It is equipped with a gear (not shown) that meshes with i28.

By the way, the second hollow shaft 10a that pivots the pivot post 10 around the hollow 11i1117 has the following features:
A host stopper 29 is fixed, and the host stopper 29
The pad 29 is formed into a cylindrical shape with an open bottom surface so as to cover the hollow shaft 7, and has an appropriate number of engagement holes 2 around it.
9a are drilled at appropriate intervals.

On the other hand, a rotation stopper 60 is fixed above the hollow shaft 7,
An engaging portion 30a is formed at the tip thereof and faces an arbitrary engaging hole 29a of the boss stopper 29.

This swing stopper 60 is attached to the hollow shaft 7 in a state in which it is turned at a certain angle with respect to the longitudinal direction of the boom in order to correspond to the storage position of the lifting device, that is, when traveling in high place work 1 (1). However, in the drawing, it is arranged in the longitudinal direction of the boom for ease of understanding.

Furthermore, an operating lever 61 is provided on the workbench 6.
A connecting rod 6 connected to the center of this operating lever 61
2, the lashing pin 63 is interlocked with the lashing pin 63 through the swivel stopper 5. Therefore, by rotating the operating lever 61, the lashing pin 66 passes through the engagement hole 29a of the post stopper 29 or the engagement hole 29a and reaches the pivot stopper. 60 engaging portion 3
It can be freely engaged and detached from 0a.

Next, to explain the operation of the embodiment of the present invention, a worker gets on the work platform B, and by controlling the rotation of the swivel platform 6 and the extension/contraction and elevation control of the boom, the operator moves the platform 6 to perform a predetermined task. Move up into position. In order to perform lifting work using the lifting devices 1 and 6 in this working position, the lashing pin 66 is moved to the engaging portion 30 of the rotation stopper 60 by pulling the operating lever 1 one step.
Engagement hole 29 of post stopper 29 which is detached from a
, a are engaged with each other, and if the swing motor 27 is operated in this state, the lifting device 16 will swing simultaneously with the kIdI movement of the workbench 6. That is, the pivot post 1 of the lifting device 15
U is integrated with the workbench 6 via a lashing pin 66, and swings when the workbench 6 rotates to lift the lifting device 16 and the workbench 6.
rotates around the hollow shaft 7.

Next, by pulling the operating lever 61 one more step, the
# The bin 66 is disengaged from the engagement hole 29a, and the engagement between the workbench 6 and the lifting device M16 is released.

Therefore, the stripping table 6 can be swiveled by the swivel motor 27 or the lifting device 16 can be swiveled with assistance, and the hoisting operation can be carried out using the winch device 21 after being transplanted to the desired hoisting position. I can do it.

When storing the equipment after completing high-place work such as lifting work, first return the lifting device 16 and work platform 6 to the stored position, and then
When the operating lever 61 is pushed in, the holding pin 66 engages with the engagement portion 2.9a of the stopper 29 and is then locked with the engagement portion 30a of the swing stopper 60, so that the workbench 6 and the hanging The upper device 16 will be secured to the hollow shaft 7, ie the boom 4.

As described above, in the present invention, lj! is controlled by the operation of a single operating lever. ! I #Securing the platform and lifting equipment nails to the boom via the pin, Securing the platform and lifting equipment, and securing the lifting equipment and work platform to the boom! f19'l i
The work efficiency is significantly improved since the remaining parts can be selected.

In addition, in the actual #bj example, lifting device iii #16 f
I The center of rotation of the calf-centered staking stand 6 is on the same axis,
In addition, the winch device 21 is mounted on the workbench 6 side, and the wire 22 passes through the hollow shaft Z and is brought out to the lifting device 16 side, so that the swinging operation of the workbench B and the raising and lowering or turning of the boom 4 are prevented. The length of the wire remains unchanged during actuation, and the wire 22 does not become taut or relaxed;
Can perform lifting work. Historically, winch device 2
1 is not mounted on the lifting device side, so that it is extremely easy to disassemble and assemble the lifting device when working in areas where the lifting device is not used.

Furthermore, although the boom 4 is constructed in a multi-stage telescoping type, the boom stages and their formation are not limited to this embodiment.
In addition, the winch device may be moved from the workbench side to the boom side.

[Brief explanation of the drawing]

Fig. 1111 shows an embodiment of the present invention, Fig. 1 is an overall side view of a high-Izur plowing truck, Fig. 2 is a partial sectional view showing an enlarged boom tip, and Fig. 6 is a partial cross-sectional view showing an enlarged tip of the boom. Both stoppers and iI! l
This is a schematic diagram showing the relationship with the I-binding pins. 1. 4..Boom, 6..Workbench, 7..Hollow shaft, 16..
... Lifting device, 21... - Winch device, 29...
・Post stopper, 60...Swivel stopper, 61・
...Operation lever, 66...Bound, pin.

Claims (1)

[Scope of Claims] (1) In an aerial work vehicle equipped with a boom having a workbench at the tip, a hollow shaft is pivotally attached to the tip of the boom, and the workbench and lifting device are rotated around the hollow shaft. a pivot post is pivotably supported, a pivot post is fixed to the hollow shaft, and a post stopper is fixed to the pivot post, and
A lashing pin that is movable forward and backward by an operating lever is disposed on the workbench, and the lashing pin is configured to be selectively engageable with the post stopper or with the post stopper and the swing stopper. A lifting device for aerial work vehicles, featuring: (2) The lifting device for an aerial work vehicle according to claim 1, wherein the post stopper is formed in a cylindrical shape and has an appropriate number of engagement holes in the cylindrical surface. (6) The lifting device for an aerial work vehicle according to claim 1, wherein the uniform swing stopper has an engaging portion at its tip. (4) The workbench is provided with a turning mechanism, and the workbench is configured to be able to turn around a hollow shaft.
Lifting device for aerial work vehicles as described in Section 1.