JP2001348200A - Contrtol device for vehicle for high lift work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle for high lift work enabling revolving operation and the like for a workbench on a lifting device without deteriorating a volume efficiency of tool boxes on a body of the vehicle. SOLUTION: The vehicle includes the lifting device 20 vertically movable at the center of a deck 4 of the body 2 of the vehicle capable of traveling, and the workbench 30 is mounted in freely revolving manner at the upper end of the lifting device 20. A plurality of the tool boxes 5 are mounted around the lifting device 20, the boxes 5 being positioned higher that the bottom of the workbench 30 in a retracted position around the lifting device 20. When a downward operation is performed by an operating device 10, a control device compares a revolving angle θ of the workbench 30 detected by a revolving angle detector 42 with a pre-set retracting angle α, and restricts a movement of the workbench 30 below a retraction restricting height AL if the revolving angle θ is outside of the retracting angle α. Further, if a revolving operation is performed below the retraction restricting height AL, a revolving action is restricted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating device in which a base end is attached to a vehicle body and a distal end is movable up and down, and a work attached to the distal end of the elevating device. The present invention relates to an aerial work vehicle having a platform and, more particularly, to a control device for restricting interference with a standing object on a vehicle body when the work table is stored on the vehicle body.

[0002]

2. Description of the Related Art An aerial work vehicle as described above is widely used, and an example thereof is an aerial work vehicle equipped with a scissor-type elevating device capable of vertically ascending and descending on a vehicle body. This is a lifting device configured to be movable up and down using a hydraulically driven scissor link on a truck bed that has a driving cabin and that can move freely, and a work table attached to the upper end of the lifting device. (Also referred to as a work floor), and a control device that controls the operation of the elevating device in accordance with the operation of an operation device provided on the work table. The operator drives the vehicle by himself and moves it to the work site, stably supports the vehicle body using a jack at the work site, then rides on the work table and raises and lowers the work table using the operating device to a desired position. It can be moved to a high place to perform the desired high place work.

[0003] In addition to the elevating device, a hydraulic control device for operating the elevating device, a tool box for storing work tools and equipment necessary for the work, and a work table are mounted on the platform of the aerial work vehicle. Ladders are installed. These standing objects are arranged at positions that do not interfere with a link arm that moves up and down or a work table that moves up and down vertically.

[0004]

However, in an aerial work vehicle, such as a scissors-link type aerial work vehicle, in which the work table is vertically moved up and down, a turning device is provided between the upper end of the lift device and the work table to raise and lower the work table. When trying to configure the worktable so as to be able to turn horizontally with respect to the device (vehicle), when trying to provide a linear movement device to enable the worktable to move linearly in the horizontal direction, or as required There have been the following problems when trying to configure the floor of the table so that it can be extended and expanded.

In the aerial work vehicle as described above, when the workbench is moved up and down, the lifting device itself such as a link arm does not come into contact with the standing object on the cargo bed. Depending on the turning angle, the moving position, or the amount of extension of the extended or extended work table, there is a possibility that the work table may come into contact with a standing object on the cargo bed, an operating cabin, or the like. For this reason, the height of a standing object disposed within the range of the turning angle, the moving range, and the extension / expansion range when the work table is turned is suppressed to a height equal to or lower than the bottom of the work table in the retracted posture. In the driving cabin direction, it is necessary to limit the amount of movement and the amount of extension and expansion.

However, in an aerial work vehicle provided with a horizontally turnable work table, it is not possible to keep the height of the standing object below the floor height of the work table in the retracted state over the entire rotation angle of the work table. In the case of an aerial work vehicle having a wide floor surface, the height of the uprights is substantially limited over the entire surface of the loading platform, which is extremely undesirable in terms of space efficiency of the work vehicle. Similarly, in a work at a high place where the worktable can be moved in a certain direction or can be extended and expanded, the standing objects in that direction are subject to height restrictions, which is not preferable in terms of space efficiency. Further, when the driving cabin is provided in the moving direction or the extending direction, the amount of movement and the amount of expansion that can be moved on the vehicle body stability surface in consideration of the overturn are limited due to the existence thereof.

[0007] Conversely, in the case where a standing object is provided without providing the height restriction as described above, the worker who intends to store the work table first needs to be placed at a position higher than the height of the standing object. It is necessary to turn the platform and move it horizontally, or to lower the floor with the floor reduced, and if such operation is neglected, the bottom of the platform will abut against the standing structure May be damaged.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has an elevation work having a lifting device and a worktable configured to be capable of horizontal turning with respect to the lifting device on a vehicle body. It is an object of the present invention to provide a control device for an aerial work vehicle that effectively utilizes a space on a cargo bed and does not contact a standing object on a vehicle body.

[0009]

In order to achieve the above object, a first aspect of the present invention is to mount a base end on a vehicle body that can move freely and a front end portion to be movable up and down with respect to the body. An elevating device arranged, a work table attached to a tip of the elevating device and horizontally arranged with respect to the elevating device, and a control for controlling the elevating operation of the elevating device and the turning operation of the work table And a control device for an aerial work vehicle having the device. In addition, on the vehicle body of the aerial work vehicle, a standing member (e.g., the tool box 5 according to the embodiment) that is erected higher than the bottom surface of the working table in the storage position where the working table is stored on the vehicle body.
And a ladder 6), the control device has a height detecting means for detecting the height of the worktable with respect to the vehicle body, and the turning angle of the worktable with respect to the vehicle body is preset as the turning angle of the worktable in the retracted posture. The control device includes a storage position detecting unit (for example, the turning angle detector 42 and the control unit 15 or the dog and the limit switch in the embodiment) for detecting whether or not the storage angle is within the storage angle range. When the turning angle of the worktable detected by the position detecting means is out of the range of the storage angle, the lifting device that moves the worktable to a storage restriction height set in advance based on the height of the standing member as a reference is provided. The control device of the aerial work vehicle is configured to regulate the operation.

According to a second aspect of the present invention, there is provided a vehicle having a movable body.
An elevating device whose base end is attached to the vehicle body and whose distal end is movably movable up and down with respect to the vehicle body, and which is attached to the distal end of the elevating device so that it can move linearly in a horizontal plane or move on the floor. An aerial work vehicle having a worktable having a length that is freely extendable and retractable, and a control device that controls the elevating operation of the elevating device and the linear movement of the worktable or the elevating operation of the elevating device and the extending and retracting operation of the worktable It is a control device. In addition, on the vehicle body of this aerial work platform, the work table is located in the linear movement direction or the extension direction of the work table in the storage position stored on the vehicle body and stands upright above the bottom surface of the work table. The control device includes a member (for example, the tool box 5 or the ladder 6 in the embodiment), a height detecting unit for detecting the height of the work table with respect to the vehicle body, and a moving position of the work table or a floor length of the work table. Storage position detecting means (for example, a movement amount detector in the embodiment) for detecting whether the position is within the range of the storage position or the storage length preset as the movement position of the workbench or the floor length in the storage posture. 44, the extension amount detector 43, the control unit 15, etc.), and the control device detects when the moving position of the worktable detected by the storage position detecting means is out of the range of the storage position. Alternatively, when the floor length of the workbench is out of the storage length range, the operation of the elevating device that moves the workbench to or below the storage restriction height set in advance based on the height of the standing member is restricted. The control device for the aerial work vehicle is configured as described above.

According to the control device configured as described above, the working table attached to the tip of the elevating device moves the storage angle, the storage position, or the storage length set as a predetermined value at the time of storage. When not in,
The operation of the elevating device that moves the workbench down below the storage restriction height set in advance based on the height of the standing object on the vehicle body is restricted. For this reason, in the aerial work platform having the control device having the above-described configuration, the tall tool box or other standing object is placed on the loading platform in the same manner as the conventional vertical lifting aerial platform vehicle in which the worktable does not perform a turning operation or the like. In addition, there is no limitation on the turning angle area, the amount of linear movement, the floor length, and the like due to the presence of such a standing object or the driving cabin. Therefore,
It is possible to provide a control device for an aerial work vehicle that effectively utilizes a space on a vehicle and does not abut against a standing object on a vehicle body and has good workability.

When the height of the worktable detected by the height detecting means is equal to or less than the storage restriction height, the control device restricts the turning operation or the linear movement of the worktable or the extension operation of the floor surface. It is desirable to configure so that
According to such a configuration, when the work table is at or below the storage restriction height, even if the operator erroneously performs a turning operation, a floor extension operation, or the like, the work table turns or linearly moves, Alternatively, it is possible to provide a safe control device for an aerial work vehicle that does not perform an extension operation and the like and does not have a risk of damaging an upright object due to an error operation.

In addition, the high work vehicle has an automatic storage operation means, and when the automatic storage operation is performed by the automatic storage operation means, the control device first turns the work table within the range of the storage angle. Or, after moving the platform within the storage position range or reducing the floor length to within the storage length range, lower the platform below the storage height limit and place the platform on the vehicle. Is preferably stored. With the configuration having such an automatic storage function, when attempting to store the worktable by manual operation, it is difficult to enter the predetermined turning angle range, and the storage work proceeds while the worktable is stopped at the storage restriction height. Thus, it is possible to provide a control device for an aerial work vehicle having good workability without causing such a situation.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a control device for an aerial work vehicle according to the present invention will be described below with reference to the drawings. First, as an example of an aerial work vehicle having this control device, an aerial work vehicle 1 provided with a vertically movable elevating device 20 on a vehicle body is shown in FIGS. 1 and 2. The construction of the work vehicle 1 will be described.

The aerial work vehicle 1 has a driving cabin 2 in front of the vehicle as shown in FIG.
a lifting device 20 configured to be able to move up and down, and a worktable 30 attached to the upper end of the lifting device 20, which surrounds the periphery of the lifting device 20. Is provided with a tool box 5 and the like which are arranged in the.

The tool box 5 includes a cab-back tool box 5f mounted behind the driving cabin 2a, a right tool box 5r mounted on the right side of the vehicle, and a left tool box 5l mounted on the left side of the vehicle. It is configured to efficiently store work tools used for work and equipment necessary for construction. The height of these tool boxes 5 is specified so that the maximum space efficiency can be obtained within a range that conforms to the structural standard of the vehicle.
When the handrail 36 is folded, it stands up to a position higher than the work table 30 within the same height range.

The elevating device 20 is a so-called scissor-type vertical elevating device, and is disposed at the center of the carrier 4 so as to be surrounded by the tool box 5. The scissor-type elevating device 20 has a configuration in which parallel link mechanisms are arranged in a plurality of stages. The scissors-type elevating device 20 is pivotally connected to a link arm of the same stage at an intermediate portion of the arm (21c, 22c. A plurality of linked link arms 21,
, 23 and 23, and an elevating cylinder (not shown) for changing the angle formed between the link arms.

The lowermost link arm of the lifting device 20 is configured such that one of the link arms is a bearing member 26x on the carrier 4.
The other link arm is pivotally connected to a slide member (not shown) on the carrier 4 and is slidably attached to the carrier 4 in the front-rear direction of the vehicle. ing. In the uppermost link arm in the elevating device, one link arm 21a is swingably connected to a bearing member 27x of the worktable base 28, and the other link arm 21b is swung by a slide member 27s of the worktable base 28. The slide member 27s
Is slidably attached to the worktable base 28 in the front-rear direction of the vehicle.

The elevating cylinder is a hydraulic telescopic cylinder, one end of which is pivotally connected to the loading platform 4 and the other end of which is pivotally connected to one of the lowermost link arms. By doing so, the lowermost link arm is attached to the vehicle body so that the link arm can be raised and lowered. For this reason, the operator operates the operation device 10 to be described later to extend and retract the elevating cylinder, thereby raising and lowering the lowermost link arm, and utilizing the action of the parallel link to operate the worktable base 28 at the upper end of the link. Can be moved up and down.

A work table (work floor) 30 having a wide floor surface is mounted on the upper part of the work table base 28 via a turning device 50 so as to be horizontally rotatable. The turning device 50 has a turning motor 55 attached to the worktable base 28, and an operator who rides on the worktable 30 operates the operating device 10 to operate the turning motor 55, and the turning device 55 in FIG. The workbench 30 can be turned with respect to the workbench base 28 as indicated by the dotted line. A collapsible handrail 36 is attached to the workbench 30. The operating device 10 that operates the lifting device 20 (elevating cylinder) and the turning device 50 (turn motor 55) is mounted on the handrail 36.
Is attached.

As described above, the lifting device 20 is operated on the front and rear and left and right sides of the vehicle body 2 of the aerial work vehicle.
When the 0 is operated, the body swings so that the worker boarding the workbench 30 does not have an unstable posture at a high place.
Outrigger jacks 17, 17,..., Which are configured so as to be able to expand and extend from the vehicle body 2 and lift and support the vehicle body 2, are attached. A ladder 6 for getting on and off the work table 30 is provided upright at the back of the loading platform of the vehicle body 2.

In the aerial work vehicle 1 configured as described above, the operator himself drives the vehicle to move the aerial work vehicle 1 to the construction site, and operates a jack operating device (not shown) to operate the outrigger jack 17. , 17 are widened and extended to lift and support the vehicle body 2, and then are mounted on the work table 30 to erect the handrail 36, and the operating device 10 is operated to extend and retract the elevating cylinder to extend the work table 30. It can be moved to a desired height. In addition, the work table 30 can be horizontally turned by operating the operating device 10 to operate the turning motor 55 at a certain height or higher, so that work at a high position can be performed in a desired work table posture.

FIG. 3 shows a configuration of a control device for controlling the operation of the lifting device 20 and the turning device 50 in the aerial work vehicle having the above-described configuration. This control device is provided with a control unit 15 that receives an operation signal from the operation device 10 and controls each operation device. When the control unit 15 receives the operation signal, the control unit 15 moves the worktable 30 up and down by the elevating device 20 and the turning device 5 according to the operation signal.
0, the turning operation of the workbench 30 is controlled. Specifically, the lifting device 20 and the turning device 50 are operated by a hydraulic cylinder (a lifting cylinder 25) and a hydraulic motor (the turning motor 5).
5), the control unit 15 outputs an operation signal to an electromagnetic control valve that supplies hydraulic oil to these hydraulic actuators, and
And the like.

The height signal and the turning angle signal of the work table 30 are also input to the control unit 15 from the height detector 41 and the turning angle detector 42. The height detector 41 is a detector that detects the height H of the worktable 30 with respect to the loading platform 4, and can be configured using various known methods.
For example, an undulation angle detector for detecting the undulation angle of the lowermost link arm is provided in the vicinity of the bearing member 26x using the characteristics of the parallel link (the relationship between the undulation angle of the link arm and the amount of extension), and the detected value It is possible to adopt a configuration in which the workbench height H is obtained through arithmetic processing. The turning angle detector 42 is a detector that detects the turning angle θ of the work table 30 with respect to the work table base.
A single or a plurality of potentiometers or the like for detecting the 0 angular position can be used.

The control unit 15 receives the height signal and the turning angle signal of the work table 30 input from the height detector 41 and the turning angle detector 42, and
0 posture is detected. Then, the operator who gets on the work table 30 uses the operation device 10 to move the lifting device 20 and the turning device 5.
When performing the operation operation of 0, it is determined whether or not the operation based on the operation signal can be permitted in the workbench posture,
An operation signal is output based on this determination.

In the control unit 15, a working range memory 1 for storing a reference value for making the above determination is provided.
6 is provided, and one of the reference values set and stored in the memory 16 is a storage restriction height AL. The storage restriction height AL is equal to the height H of the work platform bottom surface 30d on the loading platform.
When the work table 30 is turned in the state of being below the storage height AL, there is a risk that the work table 30 may come into contact with the standing object on the loading platform 4, and in this embodiment, the driving cabin 2a
And a regulation value defined based on the height of the tool box 5 on the carrier.

The control unit 15 includes the height detector 4
1 is compared with the storage restriction height AL stored in the work range memory 16, and when it is determined that the work table height H exceeds AL, the swing motor 55 is turned on. The swing operation of the work table 30 by the swing motor 55 is restricted when it is determined that the work table height H is equal to or less than AL.

For example, in a storage posture in which the work table 30 is stored on the load bed 4 (work table position indicated by a two-dot chain line in FIG. 1), the operator who is on the work table 30 turns the operation device 10 by mistake. Even when the operation is performed, the control unit 15 restricts the turning operation based on the operation signal because the detected workbench height is equal to or less than the storage restriction height AL (outputs the turning operation signal). Work table 30
Do not turn the. On the other hand, when the workbench is in the posture shown by the solid line in FIG. 1, the detected workbench height H exceeds the storage restriction height AL, so that an operation signal corresponding to the operation signal is output and the workbench is output. Allow 30 free swivel movements.

Further, the control unit 15 regulates the elevating operation in which the work table 30 is moved below the storage restriction height AL in a state where the work table 30 is turned. As is clear from FIG. 2, when the worktable 30 is turned by a certain angle or more at a height position exceeding the storage restriction height AL, the worktable portion in the front-rear direction in the storage posture is located above the left and right tool boxes 5r and 5l. Protrude into. Therefore, when the workbench 30 is lowered in such a state, the workbench lower surface 30d may interfere with the upper surfaces of the left and right tool boxes 5r and 5l and damage them.

The working range memory 16 contains a storage restriction height A.
The storage angle α is set and stored as a range of the swivel angle θ at which the workbench 30 can be lowered below L.
When the lowering operation of 0 is performed, the turning angle of the worktable input from the turning angle detector 42 is compared with the storage angle α,
When it is determined that the turning angle θ of the work table 30 is not within the range of the storage angle α, the lowering operation of the work table to the storage height AL or less is restricted. On the other hand, when it is determined that the turning angle θ of the work table 30 is within the range of the storage angle α, the lowering operation is allowed as it is, and an operation signal corresponding to the operation signal is output to output the work table 30 to the storage height AL or less. Is allowed to descend (retract operation).

The storage angle α is a turning angle range in which each part of the work table 30 does not come into contact with the tool box 5, the ladder 6, and the like when the work table 30 is stored on the loading platform 4. ± 2 for the central turning angle in
A value of about three degrees is set.

For this reason, even if the operator who gets on the work table 30 forgets that the work table is being turned and lowers the work table, the turning angle θ of the turn table can be obtained.
Is out of the range of the storage angle α that can be stored, the lowering operation of the workbench is restricted by the storage restriction height H and stopped, so that the lower surface 30d of the workbench is accidentally brought into contact with the tool box 5 or the ladder 6. There is no risk of damage.

The operating device 10 is provided with an automatic retract switch. When the automatic retract switch is operated, the control unit 15 operates based on the control flow shown in FIG. 50 operation is controlled.

When the automatic storage switch is operated, the control unit 15 starts the automatic storage sequence from step S0. First, in step S10, it is determined whether or not the workbench height H detected by the height detector 41 exceeds the storage restriction height AL. Then, the workbench height H exceeds the storage restriction height AL (YE
In step S30, the process proceeds to step S30 for determining whether to turn the worktable. When the storage height is equal to or less than the storage restriction height AL (NO), the worktable cannot be turned, and thus the process proceeds to step S20 for confirmation. .

As described above, since the control unit 15 regulates the turning operation of the work table 30 when the work table height H is less than the storage restriction height AL, the work table height H is less than the storage restriction height AL. In some cases, the turning angle θ of the workbench 30 should already be within the range of the storage angle α. However, when the work table 30 is forcibly turned by an external force while working at the work table position where the work table 30 is below the storage restriction height AL, for example, if the work table 30 is turned below the storage restriction height AL. Even so, the turning angle θ of the workbench may exceed the range of the storage angle α. In such a case, when the work table 30 is lowered,
There is a possibility that the lower surface 30d of the workbench may abut on the tool box 5 or the like to cause damage.

In step S20, it is checked whether or not the turning angle θ detected by the turning angle detector 42 is within the range of the predetermined storage angle α. ), The process proceeds to step S50, and when it is determined that the value is out of the range (at the time of abnormality), the process proceeds to step S25 to stop the automatic storage and perform an alarm operation such as an alarm display.

In step S30, it is determined whether or not the turning angle θ of the worktable detected by the turning angle detector 42 at the height position exceeding the storage restriction height AL is within a predetermined storage angle α. . When it is determined that the turning angle θ is out of the range of the storage angle α, the process proceeds to step S40 for turning the work table 30. When it is determined that the turning angle θ is within the range of the storage angle α, the work is performed. The process proceeds to step S50 of lowering the table without turning the table.

In steps S40 to S45, the turning motor 55 of the turning device 50 is operated to
The work table 30 is turned so that the turning angle θ falls within the range of the storage angle α. And the turning angle θ is the storage angle α
When it is determined that the rotation is within the range, the operation of the turning motor 55 is stopped, and the turning operation is stopped (step S4).
8), proceed to step S50.

In steps S50 to S55, the lifting cylinder 25 of the lifting device 20 is operated to
Is lowered, and the workbench 30 is stored in a predetermined storage position (for example, a position where storage is detected by a limit switch). Then, when the storage in the predetermined storage position is detected, the operation of the lifting cylinder 25 is stopped (step S5).
8) In step S60, the automatic storage sequence ends.

According to the control device configured as described above, the operating table 30 can be automatically stored on the loading platform 4 simply by operating the automatic storage switch on the operating device 10 on the operating table. The operator on the work table 30 does not need to manually perform a relatively delicate operation operation of adjusting the turning angle θ of the turning table within the range of the storage angle α, thereby reducing the burden on the operator. Thus, it is possible to provide a control device for an aerial work vehicle having good workability.

In the above, the turning state of the work table 30 is detected as a turning angle signal using the turning angle detector 42, and the control unit 15 detects the detected turning angle θ.
A method for determining and controlling whether or not it is within the range of the storage angle α based on the above has been disclosed. That is, in the above embodiment, the turning angle detector 42 and the control unit 15
Constitute storage position detecting means in the claims. However, the present invention is not limited to such an embodiment.For example, instead of a turning angle detector, a dog and a limit switch are arranged to operate at a predetermined storage angle,
Whether the workbench 30 is within the range of the storage angle may be detected by opening and closing the contacts of the limit switch, and the operation of the lifting device may be controlled based on the detection signal.

In the above, the elevating device 20 which operates up and down is placed
Although the aerial work vehicle having the turning device 50 that allows the turning operation of the work table 30 has been described, the above-described technology expands and contracts the work table area by expanding and contracting the floor length of the work table 30 as well as the turning device. The present invention can also be applied to an aerial work vehicle having a workbench expanding / contracting device capable of moving the workbench 30 linearly in a fixed direction with respect to the workbench base 28 in a certain direction.

FIGS. 5 and 6 are a top view (FIG. 5) and a side view (FIG. 6) of an aerial work vehicle 100 provided with a workbench expanding / contracting device 60 instead of the above-described turning device 50 of the aerial work vehicle 1. ), And the aerial work vehicle 1 described above with reference to FIG.
The differences from the above will be briefly described. Note that the same parts as those of the aerial work vehicle 1 are denoted by the same reference numerals, and description thereof will be omitted.

A workbench expansion / contraction device 60 is provided above the lifting / lowering device 20 mounted on the loading platform 4 via a workbench base 28.
Is attached. Work table 31
An auxiliary worktable 35, which can be extended and expanded by the operation of an expansion / contraction cylinder 65 as shown by a two-dot chain line in the figure, is slidably and elastically mounted inside the inside. The workbench 31 has, instead of the turning angle detector 42 in the control device shown in FIG.
An extension amount detector 43 for detecting an extension amount of the auxiliary work table 35 extended from the work table 31 is attached. An operator who rides on the worktable 31 operates the operating device 10 to extend and contract the expansion / contraction cylinder 65, and the worktable 35
Can be extended and stored to enlarge or reduce the workbench area.

In such an aerial work vehicle 100, when the workbench is lowered while the auxiliary worktable 35 is extended at a height position exceeding the storage restriction height AL, the extended auxiliary worktable 35 is extended. The lower surface of the front tool box 5f and the driving cabin 2
There is a possibility that these may be damaged by contacting with a.

The control unit 15 includes the operating device 1
When the lowering operation of the worktable is performed at 0, the extension amount of the auxiliary worktable 35 detected by the extension amount detector 43 and the protrusion amount in the storage posture of the worktable 31 are stored in the work range memory 16 in advance. Is compared with the storage length stored in the storage unit. When the storage length is exceeded, the lowering operation of the work table 31 to the storage restriction height AL or less is restricted, and when the storage length is less than the storage length, the work table 31 is lowered to the storage restriction height AL or less. The lowering operation (retracting operation) of the work table 31 is permitted.

In the operating device 10, the auxiliary worktable 3
When the overhang operation 5 is performed, the work table height H detected by the height detector 41 is compared with the storage restriction height AL, and the work table height H is equal to or less than the storage restriction height AL. At times, the extension operation of the auxiliary worktable 35 is restricted. In the automatic storage control, the storage length is used as a judgment reference value instead of the storage angle α described above.

In the above-described embodiment, a configuration has been described in which the extension amount of the auxiliary worktable 35 is detected by the extension amount detector 43, and the detected value is compared with the storage length in the work range memory. A limit switch, a proximity switch, or the like is used as the extension amount detector, and the
And when the switch contact is closed (or opened), it can be determined that it is within the predetermined storage length range.

FIG. 7 shows an aerial work vehicle 110 having the linear moving device 70 of the work table 32 on the elevating device 20. In this aerial work vehicle 110, a worktable 32 is mounted on a worktable base 28 so as to be slidable in the left-right direction of the vehicle, and a movable cylinder disposed between the worktable base 28 and the worktable 32. The worktable 32 is configured to be linearly movable by the operation of 75 as shown by a two-dot chain line in the figure. The workbench 32 has a movement amount detector 4 for detecting the movement amount of the workbench 32 projecting from the workbench base 28, instead of the turning angle detector 42 in the control device shown in FIG.
4 is attached. The operator on the worktable 32 operates the operating device 10 to move the moving cylinder 75.
The work table 32 can be moved linearly, and the work table can be moved to the vicinity of the wall surface W of the building structure as shown in the drawing, for example, to perform work at a high place.

In the aerial work vehicle 110 as described above, instead of the above-described turning angle and the amount of overhang of the auxiliary work table, the movement amount of the work table 32 is used as a reference, so that the same Regulation control and automatic storage control can be performed,
Further, the same effect can be obtained.

In the above, the case where the workbench on the lifting / lowering device turns, the case where the workbench area expands / contracts, and the case where the workbench moves linearly have been individually described. It may be a thing which is performed in a special way.
In addition, the scissors-link type elevating device has been exemplified as the elevating device in which the base end portion is attached to the vehicle body and the distal end portion is configured to be able to move up and down.However, the present invention is not limited to this type of elevating device. Any elevating device capable of vertically elevating may be used. For example, in a boom type elevating device having a boom capable of turning, raising and lowering, and expanding and contracting on a vehicle body, a so-called HV that can vertically move up and down by synchronously controlling these operating shafts is also used.
For aerial work vehicles that perform control (horizontal / vertical control),
The configuration can be the same as that of the above embodiment, and the same effect can be obtained.

[0052]

As described above, according to the present invention, there is provided an elevating device in which a base end is attached to a vehicle body which is movable and a distal end portion is arranged so as to be movable up and down with respect to the vehicle body. ,
A workbench attached to the tip of the elevating device and freely disposed for horizontal rotation and horizontal movement with respect to the elevating device, expansion and contraction of the worktable area, etc .; Control device for controlling an aerial work platform, comprising: a height detecting means for detecting the height of the workbench by the control device; a turning angle of the workbench relative to the vehicle body, a moving position of the workbench, or the workbench. Storage position detecting means for detecting whether or not a state quantity such as a floor length is within a predetermined storage reference value in the storage posture of the workbench; When, the control device of the aerial work vehicle is configured to regulate the operation of the elevating device that moves the workbench to a storage restriction height that is set in advance based on the height of the standing member on the vehicle body. I do.

According to such a control device, when the workbench is not within the range of the storage reference value preset as the predetermined value at the time of storage, the height of the standing object on the vehicle body is used as a reference. The workbench lowering movement to be less than or equal to the preset storage restriction height is restricted. For this reason, a tall tool box or other standing object can be arranged on the vehicle body, and further, depending on the standing object and the operation cabin, the turning angle area, the linear movement amount,
Floor length is not restricted. Therefore, it is possible to provide a control device for an aerial work vehicle that can effectively utilize the space on the vehicle and has good workability without being brought into contact with a standing object on the vehicle body.

When the height of the worktable detected by the height detecting means is equal to or less than the storage restriction height, the control device restricts the turning operation or the linear movement of the worktable or the extension operation of the floor surface. It can be configured as follows. According to such a configuration, even when the worker erroneously performs a turning operation, a floor extension operation, or the like when the work table is below the storage regulation height, the work table performs the turning operation, the extension operation, or the like. Thus, it is possible to provide a safe control device for an aerial work vehicle that does not have the possibility of damaging an upright object even by an erroneous operation.

The high work vehicle has an automatic storage operation means. When the automatic storage operation means performs the automatic storage operation, the control device first turns the worktable within the range of the storage angle. Or, after moving the platform within the storage position range or reducing the floor length to within the storage length range, lower the platform below the storage height limit and place the platform on the vehicle. Is preferably stored. With such a configuration having the automatic storage function, the operator does not need to manually perform a relatively delicate operation operation of adjusting the swivel angle of the swivel table and the moving amount of the worktable within a predetermined range, This makes it possible to provide a control device for an aerial work vehicle that reduces the burden on the worker and has good workability.

[Brief description of the drawings]

FIG. 1 is a side view of an aerial work vehicle having a control device according to the present invention.

FIG. 2 is a top view of the aerial work vehicle.

FIG. 3 is a block diagram illustrating a configuration of a control device according to the present invention.

FIG. 4 is a flowchart showing a flow of automatic storage control in the control device according to the present invention.

FIG. 5 is a top view of an aerial work vehicle having another control device according to the present invention.

FIG. 6 is a side view of the aerial work vehicle.

FIG. 7 is a top view of an aerial work vehicle having still another control device according to the present invention.

[Explanation of symbols]

AL Storage restriction height 1,100,110 Aerial work platform 2 Body 2a Operating cabin (standing member) 5 Tool box (standing member) 6 Ladder (standing member) 15 Control unit (control device, storage position detecting means) 20 lifting device 30, 31, 32 work table 41 height detector (height detection means) 42 turning angle detector (storage position detection means) 43 extension amount detector (storage position detection means) 44 movement amount detector ( Storage position detection means)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3F333 AA08 AA15 AB03 AC02 AC03 AC07 BB26 BD02 CA15 FA11 FA17 FA21 FA34 FD03 FD04 FD09 FE01 FE09 FH03

Claims (4)

[Claims] An elevating device having a base end attached to the vehicle body and a distal end movably movable up and down with respect to the vehicle body; A control device for an aerial work vehicle having a work table attached and disposed to be horizontally pivotable with respect to the lifting device, and a control device for controlling the lifting operation of the lifting device and the turning operation of the work table. Wherein the workbench has an upright member that is erected higher than the bottom surface of the worktable in a storage position in which the worktable is stored on the vehicle body; Height detecting means for detecting the height of the worktable with respect to the vehicle, and whether or not the turning angle of the worktable with respect to the vehicle body is within a range of a storage angle set in advance as the turning angle of the worktable in the storage posture. Storage position detecting means for detecting The control device, when the turning angle of the worktable detected by the storage position detection means is out of the range of the storage angle, the control device is preset based on the height of the standing member A control device for an aerial work vehicle, wherein the operation of the elevating device that moves the work table below the storage regulation height is regulated. 2. An elevating device having a base end attached to the vehicle body and a distal end movably movable up and down with respect to the vehicle body. A workbench, which is attached and arranged so that it can move linearly in a horizontal plane or the length of the floor surface is stretchable, and the elevating operation of the elevating device and the linear movement of the worktable or the elevating operation of the elevating device; A control device for an aerial work vehicle, comprising: a control device configured to control a telescopic operation of the worktable, wherein the worktable is stored on the vehicle body in a stored position on the vehicle body. An upright member that is located in a moving direction or an extending direction of the floor surface and that is erected higher than a bottom surface of the work table; the control device detects a height of the work table with respect to the vehicle body; Height detection means and movement of the work table Or a storage position for detecting whether the floor length of the workbench is within a storage position or a storage length preset as a movement position or a floor length of the workbench in the storage posture. Detecting means, wherein the control device is configured to detect when the moving position of the worktable detected by the storage position detecting means is out of the range of the storage position, or when the floor length of the worktable is stored in the storage position. When the height is out of the range, the operation of the lifting device that moves the work table to a storage restriction height that is not more than a preset storage restriction height based on the height of the standing member is regulated. Car control device. 3. The control device according to claim 1, wherein when the height of the worktable detected by the height detection means is equal to or less than the storage restriction height, the worktable is turned or moved linearly or the floor surface is moved. 3. The control device for an aerial work vehicle according to claim 1, wherein the extension operation of the vehicle is regulated. 4. The high-place work vehicle has automatic storage operation means, and the control device moves the work table to the range of the storage angle when the automatic storage operation is performed by the automatic storage operation means. The work table is moved within the range of the storage position, or the floor surface length is reduced within the range of the storage length to work the storage height or less. 4. The control device for an aerial work vehicle according to claim 1, wherein the workbench is lowered and the workbench is stored in the vehicle body. 5.