JPH07117998A - Work floor lift control device for connection type vehicle for high lift work - Google Patents

Abstract

PURPOSE:To lift or lower the work floors of a plurality of vehicles for high lift work to the same height. CONSTITUTION:The work floors 2 of a plurality of vehicles 4 for high lift work are connected respectively, and an operation box 9 arranged on a specific vehicle 4 for high lift work is provided with a lift operation member outputting the lifting signal and the lowering signal and a lift mode switching member outputting the simultaneous lift signal and the selecting signal. When the lifting/ lowering signal and the simultaneous lift signal are inputted to a controller 10 from the operation box 9, lift mechanisms 3 of the vehicles 4 for high lift work are operated respectively, and the work floors 2 are concurrently lifted or lowered. When the lifting/lowering signal and the selecting signal are inputted to the controller 10 from the operation box 9, only the lift mechanism 3 of the selected vehicle 4 for high lift work is operated, and one work floor 2 is lifted or lowered alone.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work platform lifting control device for a combined aerial work vehicle in which the work floors of a plurality of aerial work vehicles are mounted on a traveling carriage so as to be lifted and lowered by a lifting mechanism. .

[0002]

2. Description of the Related Art As an aerial work vehicle, it is known that a work floor is mounted on a traveling carriage so that the work floor can be raised and lowered by an elevating mechanism, and a controller for controlling traveling and raising and lowering and an operation box are provided on the work floor.

This aerial work vehicle is used in building construction sites for ceiling work such as air conditioning work, electrical work, sanitary work and board pasting work. For these works, it is necessary to install long pipes for piping. In this case, a single work vehicle for aerial work cannot secure a large work space, so the work floors of the two work vehicles for aerial work are connected to form a work vehicle for aerial work.

That is, an aerial work vehicle used in a building construction site is made compact for transportation and the like, and one aerial work vehicle cannot secure a wide working space, and thus two aerial work vehicles. A large work space is secured by connecting the work floors of.

For example, as shown in Japanese Utility Model Laid-Open No. 4-122590, the work floors of two aerial work vehicles are connected by a connecting member, and both controllers are connected by a signal cable, so that The operation box allows two aerial work vehicles to travel and ascend and descend.

[0006]

In the above-mentioned articulated work platform, the work boxes of two work platforms can be simultaneously raised and lowered by the operation box of one work platform. Ascending and descending speeds differ depending on the size of the load,
It is very difficult to make the work floors of a plurality of aerial work platforms at the same height, and the heights of the work floors differ during actual work.

As described above, when the heights of the work floors of the two aerial work vehicles are different from each other, when the above-mentioned long pipe for piping is mounted on the ceiling, the long pipe for piping is oblique to the horizontal. It makes it harder to work.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a work floor elevating control device for an articulated work platform capable of solving the above-mentioned problems.

[0009]

[Means for Solving the Problems] A plurality of aerial work vehicles 4 in which a work floor 2 is vertically movable by a lifting mechanism 3 are installed side by side on a traveling carriage 1, and each work floor 2 is connected by an upper connecting member 6. In the articulated aerial work vehicle, the first means for simultaneously elevating and lowering the work floors 2 of the aerial work vehicles and the work floors 2 of the work vehicles of any one aerial work vehicle are selected and individually selected. A work floor lifting control device for an articulated work platform equipped with a second means for raising and lowering.

[0010]

[Operation] Each work floor 2 of multiple aerial work vehicles can be raised and lowered at the same time, and any one work platform 2 of aerial work vehicles can be raised and lowered independently. Can be at the same height.

[0011]

[Example] As shown in FIG. 1, a work platform 2 is attached to a traveling carriage 1 by an elevating mechanism 3 so that the work floor 2 can be lifted and lowered.
The traveling carriages 1 of the plurality of aerial work vehicles 4 are connected by a lower connecting member 5, and the work floors 2 are connected by an upper connecting member 6 to form a connectable aerial work vehicle. The lifting mechanism 3 connects the link 7 to the lifting cylinder 8
However, other configurations may be used.
That is, the work floor 2 may be moved up and down by driving the actuator.

A controller 10 is provided on each of the aerial work vehicles 4.
And an operating box 9 are provided on the work floor 2 of one of the aerial work vehicles 4, and each controller 10 is connected by a connecting signal cable 11 piped along the lower connecting member 5 and The aerial work vehicle 4 is a parent and the other aerial work vehicle 4 is a child. In the discrimination between the parent and the child, it is determined that the person who is connected to the operation box 9 is the parent and the person who is not connected is the child.

As shown in FIG. 2, the upper connecting member 6 is composed of a floor 12 and a handrail 13. The floor 12 is provided with hooks 15 at both ends of a floor material 14, and each hook 15 is a work floor. 2 is engageable with a horizontal rod 16 which is horizontally mounted between the front and rear ends thereof so as to be rotatable up and down, is detachable across the left and right work floors 2 and, and is rotatable up and down relatively to the work floor 2. It is movably connected.

With respect to the handrail 13, a first handrail 17 provided on one work floor 2 and a second handrail 18 provided on the other work floor 2 can be relatively vertically displaced by a bracket 19, a pin 20, and an elongated hole 21. The upper connecting member 6 has a structure in which the adjacent work floors 2 can be vertically displaced relative to each other by a certain stroke so that the adjacent work floors 2 are damaged even if the heights of the adjacent work floors 2 differ by a predetermined height Ha. I try not to. That is, it has an allowable height difference Ha.

As shown in FIG. 3, the expansion chamber 8a and the contraction chamber 8b of the elevating cylinder 8 are each controlled to be supplied with the pressure oil discharged from the hydraulic pump 22 by an electromagnetic switching valve 23. The energization of the second solenoids 24, 25 is controlled by the controller 10, and the controller 10 receives a raising signal, a lowering signal and the like from the operation box 9 so that the controller 10 does not connect the aerial work vehicle to the connecting signal cable 11. Can be controlled when not connected.

In the case of a connecting type aerial work vehicle in which aerial work vehicles are connected as shown in FIG. 1, each controller 10 is connected by a connecting signal cable 11 as shown in FIG. The operation is controlled by a signal from an operation box 9 provided in the vehicle. When the operation boxes 9 are provided on the work floors 2 of the aerial work vehicles 4, the operation is not controlled by the signals from the operation boxes 9 provided on the child-side work vehicles.

The operation box 9 includes an elevating operation member 26 such as a lever and an elevating mode switching member 27 such as a switch.
Is provided, and the lifting mode switching member 27 can be switched to the simultaneous lifting position A, the parent lifting position B, and the child lifting position C.

When three or more aerial work vehicles are connected, there are as many child positions as there are aerial work vehicles, and any one child work machine can be selected. is there.

Next, the operation will be described. For convenience of explanation, the left side is the parent and the right side is the child in FIG. 1, and the left side is the parent and the right side is the child in FIG. When the raising / lowering mode switching member 27 of the operation box 9 on the left side in FIG. 3 is used as the simultaneous raising / lowering device A and the raising / lowering operation member 26 is operated to the raising side, a simultaneous raising signal is input to the parent side controller 10 and the parent side electromagnetic switching valve 23. First solenoid 2
4 is energized to switch to the raised position, and at the same time, the parent controller 10 outputs a raising signal to the child controller 10 to energize the first solenoid 24 of the child electromagnetic switching valve 23 to switch to the raised position. Each lifting cylinder 8 extends and each work floor 2 simultaneously rises.

When the raising / lowering mode switching member 27 is set as the parent raising / lowering position B and the raising / lowering operation member 26 is continuously operated in the raising side, a parent raising signal is inputted to the controller 10 on the left side and the first solenoid 24 of the electromagnetic switching valve 23 on the left side. Is energized for a predetermined time to switch to a raised position for a predetermined time, and the left lifting cylinder 8 is extended for a predetermined time to raise the work floor 2 of the parent aerial work vehicle for a predetermined time (predetermined distance). That is, the controller 1
0 has a timer function, and energization starts when the parent signal is input, and the energization is stopped when the timer operates and the set time of the timer is passed. Here, the predetermined time during which the work floor 2 rises means the allowable height difference Ha between the adjacent work floors 2 described above.
Only as time to rise. If the lifting operation member 26 is neutralized within the predetermined time, the electromagnetic switching valve 23 will be immediately in the neutral position.

When the raising / lowering mode switching member 27 is set to the child raising / lowering position C and the raising / lowering operation member 26 is continuously operated in the raising direction, a raising signal is input from the left controller 10 to the right controller 10 and the child movement is performed in the same manner as described above. Only the work floor 2 of the aerial work vehicle is elevated for a predetermined time (a predetermined distance). That is, the right controller 10 also has a timer function.
Also in this case, if the raising / lowering operation member 26 is set to the neutral position, the electromagnetic switching valve 23 will be in the neutral position even within the predetermined time.

Next, a second embodiment will be described. A height sensor for detecting the height of the work floor 2 is provided on each of the work platforms, and a detection signal of the work floor height detection sensor 30 is input to the controller 10 as shown in FIG. . The work floor height detection sensor detects the stroke of the elevating cylinder 8 at the tilt angle of the elevating cylinder 7, detects the output signal of a rotary potentiometer provided at the pivot of the link 7, and is connected to the link 7. The rope is connected to a rotary potentiometer provided on the traveling carriage 1 and is detected by a change in the length of the rope, or the stroke of the lift cylinder 8 is directly detected.

Next, the operation will be described. For convenience of explanation, the left side is the parent and the right side is the child in FIG. 1, and the left side is the parent and the right side is the child in FIG. When the raising / lowering mode switching member 27 of the operation box 9 on the left side in FIG. 4 is set to the simultaneous raising / lowering position A and the raising / lowering operation member 26 is operated to the raising side, a simultaneous raising signal is input to the parent side controller 10 and the parent side electromagnetic switching valve 23. First solenoid 2
4 is energized to switch to the raised position, and at the same time, a controller 10 on the parent side inputs a lifting signal to the controller 10 on the child side to energize the first solenoid 24 of the electromagnetic switching valve 23 on the child side to switch to the raised position. Each lifting cylinder 8 extends and each work floor 2 simultaneously rises.

At the same time, the height of each work floor 2 is detected by the detection sensor 14 and input to the controller 10,
The controller 10 has the maximum height Hmax of the work floor 2.
And the height Hmin of the work floor 2 having the lowest height, the height work vehicle having the maximum height, and the height work vehicle having the lowest floor height. The determination of Hmax, Hmin, the aerial work vehicle with the maximum floor height, and the aerial work vehicle with the lowest floor height is performed by the controller 10 mounted on each of the plurality of aerial work vehicles in the operation box 9
Is connected to the controller 10, that is, the controller of the parent aerial work vehicle. Further, the height detection sensor signal and the solenoid energization signal between the work vehicles at high places may be exchanged by wire or wirelessly.

The maximum height Hmax and the minimum height Hmin
Is calculated, and this value is the preset limit value HU
When it is larger than TH (the above-mentioned allowable height difference Ha), the energization of the first solenoid 24 of the electromagnetic switching valve 23 of the aerial work vehicle having the aforesaid maximum floor height is stopped and the work floor 2 of the aerial work vehicle 2 is stopped.
Is stopped and the work floor 2 of another aerial work vehicle is raised.
As a result, the above-mentioned maximum height Hmax and minimum floor height Hm
When the difference of in becomes small and the value becomes smaller than the limit value HUTH, the electromagnetic switching valve 23 of the aerial work vehicle of the maximum floor height
The first solenoid 23 is energized to raise all work floors 2.

Lifting mode switching member 27 of the operation box 9
When a simultaneous lowering signal is input to the controller 10 from the elevating operation member 26 at the simultaneous elevating position A, the second solenoid 25 of each electromagnetic switching valve 23 is energized to apply pressure oil to the compression chamber 8b of each elevating cylinder 8 as described above. Are respectively supplied to descend each work floor 2. The height of each work floor 2 is detected by the height detection sensor 14 and input to the controller 10,
The height Hmax of the work floor 2 at the maximum height of the controller 10
And the minimum working floor height Hmin and maximum floor height,
Determine the aerial work vehicle with the lowest floor height.

The minimum height Hmin and the maximum height Hmax
The difference is calculated and this value is the preset limit value HD
When it is larger than TH (the above-mentioned allowable height Ha), the energization of the second solenoid 25 of the electromagnetic switching valve 23 of the aerial work vehicle having the aforesaid minimum floor height is stopped to stop the work floor 2 of the aerial work vehicle. Then, the work floor 2 of another aerial work vehicle is lowered. As a result, the above-mentioned maximum height Hmax and minimum height Hmin
When the difference becomes smaller than the limit value HDTH, the second position of the electromagnetic control valve 23 for the aerial work vehicle with the lowest floor height is reduced.
Energize the solenoid 25 to lower all work floors.

When the raising signal and the lowering signal are not input from the operation box 9, the energizing signal is not output and the electromagnetic switching valves 23 are set to the neutral position to stop the work floors 2. The above operation is shown in a flowchart in FIG.

Even if the work floors 2 are simultaneously raised synchronously as described above, the heights of the work floors 2 do not necessarily become the same. In that case, the following operation is performed. Are the same height.

When only the working floor 2 of the parent aerial work vehicle is to be lifted. When the raising / lowering mode switching member 27 is set as the parent raising / lowering position B and the raising / lowering operation member 26 is continuously operated in the raising side, a parent raising signal is input to the controller 10 on the left side to energize the first solenoid 24 of the electromagnetic switching valve 23 on the left side. The working floor 2 of the parent work vehicle rises by extending the lifting cylinder 8 on the left side to raise the working floor 2 of the parent aerial work vehicle. Therefore, when the working height becomes the same height, the lifting operation member 26 is set to neutral and the working floor 2 is stopped. To do. The ascending distance of the work floor 2 is input to the controller 10 from the work floor height sensor 30, and when the ascending distance reaches a predetermined distance (allowable height difference Ha) from the reference height, the energization is stopped and the electromagnetic switching valve 23. Is set to the neutral position so that the height difference between the adjacent work floors 2 does not exceed the above-described allowable height difference Ha. The reference height is one of the average height, the minimum height, and the maximum height of the work floor of the aerial work vehicles other than the aerial work vehicles that move up and down.

When it is desired to raise only the working floor 2 of the child's aerial work vehicle. When the raising / lowering mode switching member 27 is set to the child raising / lowering position C and the raising / lowering operation member 26 is continuously operated to the raising side, a raising signal is input from the left controller 10 to the right controller 10, and the child's aerial work is performed in the same manner as described above. When the working floor 2 of the vehicle rises and becomes the same height, the lifting operation member 26 is made neutral and the working floor 2 is stopped. Also at this time, the maximum rising distance of the work floor 2 is limited in the same manner as described above.

[0032]

The work floors 2 of a plurality of aerial work vehicles can be raised and lowered at the same time, and the work floors 2 of any one aerial work vehicle can be raised and lowered independently. 2 can be the same height. Work floor 2 of any one aerial work platform
Since the maximum moving distance is limited when the operator independently moves up and down, even if the operator continues to operate, the height difference between the adjacent work floors 2 is within a certain value, and the connecting portion between the work floor 2 and the upper connecting member 6 is Will not be damaged.

[Brief description of drawings]

FIG. 1 is a schematic front view of an articulated work platform.

FIG. 2 is a front view showing a specific structure of an upper connecting member.

FIG. 3 is a control circuit diagram.

FIG. 4 is a control circuit diagram of a second embodiment.

FIG. 5 is an operation flowchart of synchronous lifting.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Traveling trolley, 2 ... Work floor, 3 ... Elevating mechanism, 4 ... High-rise work vehicle, 6 ... Upper connection member, 9 ... Operation box, 10 ... Controller, 11 ... Connection signal cable, 23 ... Electromagnetic switching valve, 26 ... Lifting operation member, 27 ... Lifting mode switching member.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuyuki Yamazaki 3-20-1 Nakase, Kawasaki-ku, Kawasaki-shi, Kanagawa Komatsu Ltd. Kawasaki Plant

Claims (6)

[Claims] 1. A connection type high place in which a plurality of work platforms 4 each having a work floor 2 which can be raised and lowered by an elevating mechanism 3 are installed side by side on a traveling carriage 1 and each work floor 2 is connected by an upper connecting member 6. In a work vehicle, a first means for simultaneously raising and lowering the work floor 2 of each aerial work vehicle and a second means for selecting one of the work floors 2 of the aerial work vehicles and independently raising and lowering it. Work floor lift control device for articulated aerial work vehicles equipped with means. 2. The work of the articulated aerial work vehicle according to claim 1, further comprising third means for restricting the maximum movement distance of one working floor 2 when the working floor 2 is independently raised and lowered. Floor lifting device. 3. A lifting operation member 26 for outputting a raising signal and a lowering signal, and a work floor signal for each aerial work vehicle.
A lifting mode switching member 27 that outputs a signal for selecting the work floor of one aerial work vehicle, and each lifting mechanism 3 and any one lifting mechanism 3 according to the signals of the lifting operation member 26 and the lifting mode switching member 27. 2. The work floor lifting control apparatus for the articulated work platform according to claim 1, wherein the controller 10 outputs a drive signal to the first means and the second means. 4. The work floor elevating / lowering device for an articulated work platform according to claim 3, wherein the controller 10 has a timer function to serve as the third means. 5. The controller 10 judges the movement distance of the work floor 2 from the work floor height detection signal from the work floor height sensor 30 and sends a drive signal when the movement distance reaches a predetermined distance. 4. The work floor lifting control device for an articulated work platform according to claim 3, wherein the third means is provided with a function of stopping. 6. A connection type high place in which a plurality of high-place work vehicles 4 each having a work floor 2 which can be raised and lowered by an elevating mechanism 3 are installed side by side on a traveling carriage 1 and each work floor 2 is connected by an upper connecting member 6. In a work vehicle, a controller 10 and an operation box 9 are attached to each aerial work vehicle 4, and each controller 10 is connected to the operation box 9 by connecting the controller 10 with a connection signal cable 11. A lifting operation member 26 configured to input a signal to the connected specific controller 10 and output the signal from the specific controller 10 to another controller 10, and to output an up signal and a down signal to the operation box 9. A lifting mode switching member 27 that outputs a simultaneous lifting signal and a selection signal for any one aerial work vehicle
The specific controller 10 outputs a switching signal to the electromagnetic switching valve 23 of each lifting mechanism 3 when the raising signal / lowering signal and the simultaneous raising / lowering signal are input, and the raising signal / lowering signal and the selection signal are input. A work floor lifting control device for an articulated aerial work vehicle which outputs a switching signal to the electromagnetic switching valve 23 of the aerial work vehicle selected at the time.