JP2001206681A - Workbench tilt control device for high-left work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct the tilt of a workbench by inclining the workbench to the intended direction of a worker when operating a workbench tilt operating device provided on the workbench while the tip of the workbench is faced to the rear side of a vehicle. SOLUTION: The workbench is rotatably provided at the tip of a vertical post provided tiltably in the longitudinal direction of a vehicle body at the tip of an expansion boom. This workbench tilt control device 40 is provided with the workbench tilt operating device 31 provided at the tip section of the workbench to be operated for correcting the tilt in the longitudinal direction of the workbench, a workbench turn angle detecting sensor 41 detecting the turn angle of the workbench, and a controller 43 inclining the workbench backward via the forward tilt action by the workbench tilt operating device 31 when the detection value by the workbench turn angle detecting sensor 41 lies in an inversion region thus indicating that the front section of the workbench is faced to the rear side of the vehicle body and inclining the workbench forward via the backward tilt action by the workbench tilt operating device 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workbench tilting control device for an aerial work vehicle, and more particularly, to a vertical post provided at a tip of a boom so as to be tiltable so as to be pivotable. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workbench tilt control device for an aerial work vehicle having a workbench tilt operation device that is operated when the workbench is tilted forward or backward with respect to the front-rear direction of a vehicle body.

[0002]

2. Description of the Related Art When performing electric construction work on a telephone pole,
Generally, an aerial work vehicle having a work table at the tip of a telescopic boom that can move up and down is used. This aerial work platform is provided with a swivel base provided on the vehicle body and capable of swiveling, an extendable boom pivotally connected to the swivel base so as to be able to move up and down, and a pivotable pivotable vertically movable at the tip of the extendable boom. And a worktable provided rotatably at the tip of the vertical post. The workbench has a boom operating device for operating the telescopic boom, a workbench tilting device for operating the workbench to tilt forward or backward with respect to the front-rear direction of the vehicle body, and pivots the workbench. And a workbench turning operation device that is operated in such a case.

[0003] When electrical work or the like is carried out using this aerial work vehicle, an operator who is on the work table operates the boom operating device to raise and lower, extend and retract the extensible boom, and makes the work table swing operation. The work table is swiveled by operating the apparatus to move the work table to a desired high position. Then, an operator who has boarded the work table performs electric construction work and the like.
At the end of the work, the swivel base is swiveled, and the telescopic boom is moved down and down to store the telescopic boom on the vehicle body and the work table is stored above the driving cabin provided on the front side of the vehicle body. I do. At this time, if the stored platform is inclined in the front-rear direction of the vehicle body, the operator operates the platform tilt operating device to tilt the platform forward or backward and correct the platform to a horizontal state. I do.

[0004]

However, since the work table is pivotally provided at the tip of the telescopic boom, when the work table is stored in the vehicle body, the work table is turned and the front of the work table is turned. May be tilted forward or backward in the front-rear direction of the vehicle body toward the rear side of the vehicle. In this case, when a forward tilt adjustment operation or a rearward tilt adjustment operation to make the work table horizontal by the work table tilt operation device is performed, the work table further tilts to the forward tilt state or the backward tilt state, and is mounted on the work table. There is a problem that the work table is inclined in a direction opposite to the direction intended by the worker, and the worker may fall over on the work table.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and a forward tilt adjusting operation or a backward tilt adjusting operation using a work table tilt operating device in a state where a front portion of a work table is directed to a rear side of a vehicle. It is an object of the present invention to provide a workbench tilt control device for an aerial work platform that corrects the tilt of a workbench in a direction intended by a worker when the work is performed.

[0006]

According to the present invention, there is provided a work platform tilt control apparatus for an aerial work platform, comprising: a lifting means (for example, a telescopic boom 11 in the embodiment) provided on a vehicle body; A support means (for example, a vertical post 17 in the embodiment) provided at the tip of the means so as to be tiltable back and forth in a vertical plane, a worktable supported horizontally and pivotably at the tip of the support means, and a support means. A tilt actuator (eg, leveling cylinder 19 in the embodiment) connected to the support means for tilting, and a work table provided for operating the work table when tilting forward or backward with respect to the longitudinal direction of the vehicle body. Workbench tilt operation means, and control the operation of the tilt actuator in accordance with the forward tilt operation or the backward tilt operation of the worktable tilt operation means to tilt the support means to tilt the worktable forward or A workbench inclination control device for an aerial work vehicle having an operation control means for tilting (for example, the controller 43 in the embodiment), wherein the workbench rotation angle detection means for detecting a workbench turning angle is provided; When the turning angle detected by the workbench turning angle detection means is in a reversal area in which the front of the workbench faces the rear side of the vehicle body, the control means tilts forward by the workbench tilt operating means. The work table is tilted rearward when the work table is tilted. When the workbench is tilted forward by the workbench inclining operation means in the non-reversal area facing the front side of the vehicle body, the workbench is tilted forward, and the workbench incline operation means performs the backward tilt operation. When And performs control to rear tilting the platform.

According to the work platform tilt control device for an aerial work vehicle having the above structure, the turning angle detected by the working table turning angle detecting means is such that the front of the work table is directed toward the rear side of the vehicle body. When in the area, when the forward tilt operation is performed by the work platform tilt operation means, the operation control means controls the operation of the tilt actuator to tilt the support means to tilt the work table rearward, thereby performing the tilt work operation. When the backward tilt operation is performed by the means, the operation control means performs control for tilting the work table forward.

Further, when the turning angle detected by the workbench turning angle detecting means is within a non-reversal area in which the front portion of the workbench faces the front side of the vehicle body, the workbench tilt operating means makes the workbench tilt operating means move forward. When the tilting operation is performed, the operation control means performs control to tilt the worktable forward, and when the worktable tilting operation means performs the backward tilting operation, the worktable is tilted rearward.

As described above, when the front portion of the worktable is in the reversal area, the forward tilt operation performed by the worktable tilt operating means becomes the backward tilt operation, and the rear tilt operation becomes the forward tilt operation.
Even when the front part of the workbench is in the reversal area, the tilt of the workbench can be corrected in the direction intended by the worker by operating the workbench tilt operation means, preventing the worker from falling over on the workbench. can do.

In the workbench tilt control apparatus for an aerial work vehicle configured as described above, it is preferable that a hysteresis area is provided between the inversion area and the non-inversion area.

According to the workbench tilt control apparatus for an aerial work vehicle having the above-described structure, when the workbench pivots from the non-reversal area to the reversal area through the hysteresis area, the workbench can be tilted forward or backward by the workbench tilting means. The tilting operation is switched to a backward tilting operation or a forward tilting operation when exceeding the hysteresis area. Further, even if the workbench in the reversal area pivots and moves from the reversal area to the hysteresis area, the forward tilt operation or the rearward tilt operation by the worktable tilt operation means is not switched, and the workbench tilting means is moved beyond the hysteresis area into the non-reversal area. When the worktable is turned, the forward tilt operation or the backward tilt operation by the worktable tilt operating means is switched.

Thus, by providing the hysteresis area between the inversion area and the non-inversion area, the position at which the operation content is switched when the work table is swiveled from the non-inversion area to the inversion area, and from the inversion area to the non-inversion area. It is possible to make the position where the operation content is switched when the turning operation is performed differently, and to prevent so-called chattering which may occur when the position where the operation content is switched is the same.

The workbench tilt control device for an aerial work vehicle according to the present invention includes an elevating means provided on a vehicle body, and a supporting means provided at a tip of the elevating means so as to be tiltable back and forth in a vertical plane. A work table supported at the tip of the support means so as to be freely rotatable horizontally, a tilt actuator connected to the support means for tilting the support means, and a case where the work table is tilted forward or backward with respect to the longitudinal direction of the vehicle body The workbench tilt operating means provided on the worktable for operating the worktable, and the support means is tilted by controlling the operation of the tilt actuator in accordance with the forward tilt operation or the backward tilt operation of the worktable tilt operation means, thereby tilting the worktable. A workbench inclination control device for an aerial work vehicle having an operation control means for tilting forward or backward, comprising: a workbench turning angle detection means for detecting a turning angle of the workbench; By the table turning angle detection means When the detected turning angle is within a predetermined turning angle area, the work table is tilted forward when the work table tilt operation means is operated forward, and when the work table tilt operation means is operated backward. The control for tilting the worktable backward is performed.

According to the work platform tilt control device for an aerial work vehicle having the above-described structure, when the swing angle detected by the work platform swing angle detecting means is within a predetermined swing angle area, the work platform tilt operating means controls the work platform tilt operating means. When the tilting operation is performed, the operation control means controls the worktable to tilt forward, and when the worktable tilting operation means performs the backward tilting operation, the operation control means controls the worktable to tilt backward.

As described above, the tilting operation of the work table by the work table tilt operating means is enabled only when the front portion of the work table is within the predetermined swing angle area of the work table, and thus the predetermined swing angle is obtained. The inclination of the worktable in the area can be corrected, and the possibility that the worker falls down on the worktable can be prevented.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to FIGS. This embodiment shows an aspect of an aerial work vehicle having a worktable with a large floor area at the tip of a telescopic boom that is capable of swiveling and telescopic movement on a vehicle body. First, before describing the workbench inclination control device of the present invention, an aerial work vehicle equipped with the workbench inclination control device will be described. As shown in FIG. 1, the aerial work vehicle 1 is configured based on a truck, has a driving cabin 5 in front of the vehicle body 3, and has front and rear sides of the vehicle body 3 behind the driving cabin 5. An outrigger jack 7 that protrudes outward and stably supports the vehicle body 3 is provided. A swiveling base 9 is provided on the rear part of the vehicle body 3 so as to protrude upward and can freely move. On the upper part of the turning base 9, a telescopic boom 11 configured to be telescopic and movable is connected. A telescopic cylinder 13 is built in the telescopic boom 11.
The telescopic boom 11 is configured to be telescopically operated by the telescopic operation of. An up-and-down cylinder 15 is pivotably connected between the lower surface of the telescopic boom 11 and the lower part of the swivel table 9 so that the telescopic boom 11 is raised and lowered by the telescopic operation of the up-and-down cylinder 15. I have.

At the end of the telescopic boom 11, a vertical post 1
7 are pivotally connected in the vertical direction so that the vertical post 1
The front end of 7 is provided with a flange portion 17a projecting in the horizontal direction. A leveling cylinder 19 is pivotally connected between the distal end portion of the telescopic boom 11 and the flange portion 17a, and the vertical post 17 shown in FIG. It is configured to be able to. The leveling cylinder 19 shown in FIG. 1 is provided with a telescopic boom 11 for detecting the undulation angle of the telescopic boom 11 with respect to the vehicle body 3.
From the boom angle sensor 21 provided on the vertical post 17 and the post angle detection sensor 23 provided on the vertical post 17 for detecting the angle between the telescopic boom 11 and the vertical post 17. Is controlled so that it is oriented vertically. For this reason, when the vehicle body 3 is mounted on a horizontal position, the vertical post 17 can be always maintained in a vertical state regardless of the up-and-down angle of the telescopic boom 11.

A turning mechanism 25 is provided above the flange portion 17a of the vertical post 17, and a work table 27 having a large floor area is mounted on the turning mechanism 25. The turning mechanism 25 has a turning motor (not shown), and the work table 27 is held by the turning mechanism 25 shown in FIG.
The work table 27 shown in FIG. 1 includes a plate-shaped bottom plate 27a and a bottom plate 27a.
a workbench handrail 27 b protruding upward from the periphery of the workbench 27, and the telescopic boom 11 provided on the bottom plate 23 on the front side of the workbench 27.
Operating device 29 for operating the swivel and swivel 9 and the vertical post 17 by extending and retracting the leveling cylinder 19.
To tilt the workbench 27 forward (the side with the boom operating device 29 is tilted lower than the side without it) or backward (the side with the boom operating device 29 is higher than the side without it). And a workbench tilting operating device 31 provided near the boom operating device 29 for operating when tilted in a high state. As shown in FIG. 2, the workbench tilt operation device 31 has an operation lever 31 a that tilts in the front-rear direction, and moves the operation lever 31 a to the workbench 27.
Is tilted toward the front end (in the direction of arrow A), the leveling cylinder 19 is extended and the worktable 27 tilted rearward swings to the horizontal state side, and the operation lever 31a is moved to the rear end side of the worktable 27 ( When tilted in the direction of arrow B), the leveling cylinder 19 is contracted and the work table 27 tilted forward swings horizontally.

Next, the workbench tilt control device of the present invention will be described. As shown in FIG.
Workbench tilt operating device 31 and workbench turning angle detection sensor 41
And a controller 43. Since the workbench tilting operation device 31 has been described above, its description is omitted.
As shown in FIG. 3, the workbench turning angle detection sensor 41 starts from a state in which the workbench 27 faces in the front-rear direction of the vehicle body 3 and moves the workbench 27 clockwise or counterclockwise from this start point.
Has a function of detecting a turning angle θ between the starting point and the work table when the turning motion occurs. The controller 43 shown in FIG. 4 includes an inversion determination circuit 45, an inversion circuit 47, and an operation control circuit 49.

The reversing determination circuit 45 detects the turning angle θ shown in FIG. 3 detected by the worktable turning angle detection sensor 41 in the reversal area A1 in which the front of the worktable 27 is directed toward the rear of the vehicle body 3. It has a function of determining whether or not there is. Here, the inversion area A1 is an area indicated by oblique lines on the right in FIG.
That is, it refers to a region where the turning angle θ is from 90 ° + ψ1 to 270 ° -ψ2. In the following, the region indicated by the oblique line on the left, that is, the region in which the turning angle θ is from 270 ° + ψ1 to 90 ° -ψ2 is referred to as a non-inversion region A2, and is indicated by a horizontal line between the inversion region A1 and the non-inversion region A2. Region, that is, the turning angle θ
Is a region from 90 ° − 領域 2 to 90 ° + ψ1, and a region where the turning angle θ is 270 ° −ψ2 to 270 ° + ψ1 is referred to as a hysteresis region A3.

The reversal determination circuit 45 shown in FIG. 4 is configured to rotate the work table 27 shown in FIG.
When entering the reversal area A1 beyond the angle of 0 ° + ψ1, an inversion signal indicating that the reversal area A1 exists is output, and the workbench 27 in the reversal area A1 is moved in the direction of arrow Y (counterclockwise). , The output of the inversion signal is continued even if the angle exceeds 90 ° + ψ1 from the inversion area A1, and the hysteresis area A
3 is further moved to enter the non-inversion area A2, and the output of the inversion signal is stopped. In addition, the inversion determination circuit 45
When the turning angle θ of the workbench 27 is within the non-rotation region A2, the inversion signal is not output. Note that the presence / absence of the output of the inversion signal when the worktable 27 turns counterclockwise is the same as that when the worktable 27 turns clockwise, and a description thereof will be omitted.

The reversing circuit 47 shown in FIG. 4 receives an operation signal of either the forward tilt operation or the backward tilt operation by the work table tilt operating device 31 and receives the reverse signal from the reverse determination circuit 45 when the work table tilt operation is performed. The function of inverting the content of the operation signal of the device 31, that is, in the case of the operation signal of the forward tilt operation, to the operation signal of the rearward tilt operation, and in the case of the operation signal of the rearward tilt operation, to the operation signal of the forward tilt operation. It has a function to make In addition, the inversion circuit 47 has a function of sending the operation signal from the workbench tilt operation device 31 to the operation control circuit 49 as it is when the inversion signal from the inversion determination circuit 45 is not received. The operation control circuit 49 controls the operation of the operation control valve V connected to the leveling cylinder 19 via a hydraulic circuit (not shown) in order to control the expansion and contraction operation of the leveling cylinder 19 according to the operation signal received from the inversion circuit 47.

Next, the operation of the workbench tilt control device 40 of the present invention will be described. First, after the aerial work vehicle 1 is moved to the work site with the work table 19 stored on the vehicle body 3 shown in FIG.
Stable support. Then, a worker (not shown) gets on the workbench 27 via the vehicle body 3, and the worker manually operates the boom operating device 29 to turn the telescopic boom 11, move up and down, and also turn the worktable 27, Workbench 27
To the desired work site. Then, the worker boarding the work table 27 performs work at a high place. When the operation is completed, the operator manually operates the boom operating device 29 to move the telescopic boom 11 down, down, down, and turn to operate the workbench 27.
Is moved above the storage position of the vehicle body 3. Hereinafter, the workbench in the storage position is referred to as “workbench in the storage posture”.

Here, in a state where the place where the vehicle is mounted is inclined and the vehicle body 3 is inclined forward or backward, it is difficult to horizontally hold the work bench 27 by the leveling cylinder 19. In this state, that is, in a state where the work table 27 is tilted forward or backward with respect to the front-rear direction of the vehicle body 3, the work table 27 shown in FIG. When in the posture, the worker boarding the work table 27 operates the work table tilt operation device 31 to perform the forward tilt operation or the backward tilt operation to correct the forward tilt or the backward tilt of the work table 27. Then, the workbench turning angle detection sensor 41 shown in FIG. 4 detects the turning angle. Then, the detected turning angle is sent to the reversal determination circuit 45 of the controller 43. Upon receiving the detected turning angle, the inversion determination circuit 45 recognizes that the detected turning angle is within the inversion area A1 shown in FIG. 5 and outputs an inversion signal.

This inversion signal is sent to the inversion circuit 47 shown in FIG. 4, and the inversion circuit 47 inverts the operation signal of the forward tilt operation or the backward tilt operation received from the workbench tilt operation device 31. That is, the inverting circuit 47 inverts the operation signal to the backward operation signal when the received operation signal is the forward operation signal, and to the forward operation signal when the received operation signal is the backward operation signal. Then, the inversion circuit 47 sends the inverted operation signal to the operation control circuit 49, and the operation control circuit 49 controls the operation of the operation control valve V according to the operation signal to control the expansion and contraction operation of the leveling cylinder 19. For this reason, in FIG. 3, the work table 27 at the position where the turning angle θ is + 180 ° is tilted backward (the side with the work table tilt operating device 31 is tilted lower than the side without it). 4), the reversing circuit 47 shown in FIG. 4 performs the backward tilt operation even if the backward tilt operation of tilting the operation lever 31a of the work table tilt operating device 31 to the rear end side (the direction of the arrow B) of the work table 27 is performed. Is inverted to the operation signal of the forward tilt operation, and the operation control circuit 49 extends the leveling cylinder 19 shown in FIG. 2 based on the inverted operation signal of the forward tilt operation. be able to. As described above, even when the tip of the workbench 27 faces the rear side of the vehicle body 3, the workbench tilt operation device 31 is operated according to the tilt of the workbench 27 viewed from the workbench tilt operation device 31, The inclination of the work table 27 can be corrected in the direction intended by the operator.

When the tip of the worktable 27 shown in FIGS. 3 and 5 is in the non-reversal area A2, the operation lever 31 of the worktable tilt operation device 31 is moved in a state where the worktable 27 is tilted forward.
When the backward tilt operation is performed by swinging a to the rear end side (the direction of the arrow A) of the workbench 27, the inversion determination circuit 45 shown in FIG. 4 does not output the inversion signal, and as a result, the workbench tilt operation device The operation signal sent from 31 is sent directly to the operation control circuit 49 via the inverting circuit 47. For this reason, the leveling cylinder 19 shown in FIG. 2 can be reduced to move the work table 27 from the forward tilted state to the horizontal state.

The turning angle θ of the work table 27 shown in FIG.
Is slightly over 90 ° + ψ1 (the position of the turning angle θ1), and when the workbench tilt operating device 31 is operated to bring the inclined workbench 27 to a horizontal state, the workbench 27 swings and the workbench Even if the turning position of 27 moves to the hysteresis area A3 side beyond the inversion area A1, the inversion determination circuit 45 shown in FIG. 4 continues to output the inversion signal. And workbench 2
When the turning angle of No. 7 becomes 90 °-以下 2 or less, the inversion determination circuit 45 stops outputting the inversion signal. That is, even if the turning position of the worktable 27 moves around 90 ° + ψ1, the inversion signal of the inversion determination circuit 45 is continuously output within the hysteresis area A3, so that the operation control valve V shown in FIG. Chattering can be prevented.

Then, the operator on the work table 27 shown in FIG. 1 operates the boom operating device 29 to operate the telescopic boom 11.
, And the work table 27 can be moved downward while keeping the work table 27 in the horizontal state and stored in the vehicle body 3. For this reason,
It is possible to prevent the possibility that the worker who has boarded the worktable 27 falls over on the worktable 27 beforehand.

In the embodiment described above, the turning area of the work table 27 is divided into the reversing area A1 and the non-reversing area A2. However, the present invention is not limited to this. Only when it is within the area, the operation control circuit 49 when the forward tilt operation is performed by the workbench tilt operating device 31.
Can tilt the work table 27 forward, and when the work table tilt operation device 31 performs the backward tilt operation, the operation control circuit 49 can perform control to tilt the work table 27 backward.

In this case, the workbench turning angle detection sensor 4 is used instead of the inversion determination circuit 45 of the controller 43 shown in FIG.
A turning angle determination circuit that determines whether the detected value of 1 is within a predetermined turning angle region is used, and the turning angle of the workbench 27 is determined by the turning angle determination circuit to be within the predetermined turning angle region. In this case, an operation signal from the workbench tilt operating device 31 is sent to the operation control circuit 49, and if the swing angle of the workbench 27 is determined not to be within the predetermined swing angle region by the swing angle determination circuit, An operation restricting circuit that interrupts the transmission of the operation signal to the operation control circuit 49 by the workbench tilt operating device 31 is used instead of the inverting circuit 47.

As described above, the tilting operation of the work table 27 by the work table tilt operating device 31 is enabled only when the work table 27 is within the predetermined swing angle area, so that the work table 27 can be moved within the predetermined swing angle area. The inclination of a certain workbench 27 can be corrected, and the possibility that the worker falls down on the workbench can be prevented. Note that the predetermined turning angle region can be set to an arbitrary angle.

[0032]

As described above, according to the workbench tilt control apparatus of the aerial work vehicle of the present invention, when the front of the workbench is in the reversal area, the workbench tilt operation means is used. Since the forward tilting operation becomes the backward tilting operation and the backward tilting operation becomes the forward tilting operation, even if the front part of the workbench is in the reversal area, the work is performed in the direction intended by the worker by operating the workbench tilting operation means. The inclination of the table can be corrected, and it is possible to prevent the worker from falling over on the work table.

In the case where a hysteresis area is provided between the inversion area and the non-inversion area, a position at which the operation contents are switched when the work table is swiveled from the non-inversion area to the inversion area, and a non-inversion area from the inversion area. The position at which the operation content is switched when turning around to the region can be made different, and so-called chattering that may occur when the operation content at the same switching position can be prevented.

Further, when the turning angle detected by the worktable turning angle detecting means is within a predetermined turning angle area, the operation control means tilts the worktable forward when the worktable tilt operating means performs a forward tilt operation. When the backward tilt operation is performed by the work table tilt operating means, the operation control means performs the control to tilt the work table backward, whereby the tilt of the work table within the predetermined turning angle area can be corrected, It is possible to prevent the worker from falling down on the worktable.

[Brief description of the drawings]

FIG. 1 is a front view of an aerial work vehicle equipped with a workbench inclination control device according to an embodiment of the present invention.

FIG. 2 is a front view for explaining the inclination of the work table in the embodiment of the present invention.

FIG. 3 is a plan view for explaining a turning movement of a worktable in one embodiment of the present invention.

FIG. 4 is a block diagram of a workbench tilt control device according to one embodiment of the present invention.

FIG. 5 is a diagram for explaining an inversion region, a hysteresis region, and a non-inversion region according to the embodiment of the present invention.

[Explanation of symbols]

Reference Signs List 1 aerial work vehicle 3 body 11 telescopic boom (elevating / lowering means) 17 vertical post (supporting means) 19 leveling cylinder (tilt actuator) 27 workbench 31 workbench tilt operating device (workbench tilt operating means) 40 workbench tilt control device 41 Workbench turning angle detection sensor (workbench turning angle detection means) 43 Controller (operation control means) A1 Inversion area A2 Non-inversion area A3 Hysteresis area

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3F333 AA08 AB04 BB09 BB26 BD02 BE02 DB02 FA12 FA17 FD09 FE04 FE09

Claims (3)

[Claims] 1. A lifting means provided on a vehicle body, a supporting means provided at the tip of the lifting means so as to be tiltable back and forth in a vertical plane, and supported at the tip of the supporting means so as to be capable of horizontal turning. A work table, a tilt actuator connected to the support means for tilting the support means, and a tilt actuator provided on the work table for operating when the work table is tilted forward or backward with respect to the longitudinal direction of the vehicle body Operating table tilt operation means, and controlling the operation of the tilt actuator in accordance with the forward tilt operation or the backward tilt operation of the work table tilt operation means to tilt the support means to tilt the work table forward or backward. A workbench tilt control device for an aerial work vehicle, comprising: a workbench turning angle detection means for detecting a turning angle of the workbench; wherein the operation control means comprises: Turning angle detection When the turning angle detected by the means is in a reversal area in which the front portion of the worktable is directed to the rear side of the vehicle body, the tilting operation means by the worktable tilt operating means performs the tilting operation. When the workbench is tilted backward, the workbench is tilted forward when the workbench is tilted by the workbench tilt operating means, and the turning angle detected by the workbench turning angle detection means is a front part of the worktable. Is located in a non-reversal area facing the front side of the vehicle body, and when the forward tilt operation is performed by the work table tilt operating means, the work table is tilted forward, and the work table tilt operating means A tilt control device for tilting the work table rearward when the tilt operation is performed. 2. The workbench tilt control apparatus for an aerial work vehicle according to claim 1, wherein a hysteresis area is provided between the inversion area and the non-inversion area. 3. An elevating means provided on a vehicle body, a supporting means provided at a tip of the elevating means so as to be tiltable back and forth in a vertical plane, and supported at a tip of the supporting means so as to be horizontally pivotable. A work table, a tilt actuator connected to the support means for tilting the support means, and a tilt actuator provided on the work table for operating when the work table is tilted forward or backward with respect to the longitudinal direction of the vehicle body Operating table tilt operation means, and controlling the operation of the tilt actuator in accordance with the forward tilt operation or the backward tilt operation of the work table tilt operation means to tilt the support means to tilt the work table forward or backward. A workbench inclination control device for an aerial work vehicle, comprising: a workbench turning angle detection unit configured to detect a turning angle of the workbench, wherein the operation control unit includes: Turning angle detection When the turning angle detected by the means is within a predetermined turning angle region, the work table is tilted forward when the work table tilt operation means performs the forward tilt operation, and the work table tilt operation means A workbench inclination control device for an aerial work vehicle, wherein the workbench is controlled to tilt backward when a backward tilt operation is performed.