JP2021102501A - Travel guidance apparatus for high elevation work vehicle - Google Patents

Abstract

To provide a travel guidance apparatus for a high elevation work vehicle that makes it easy to grasp a travelling direction when a worker riding on the working table of the high elevation work vehicle performs a travelling control operation.SOLUTION: A high elevation work vehicle 1 comprises a movable travelling body 10, a revolving structure 20 installed so that it can be horizontally turned to the travelling body, an undulating and telescopic boom 30 installed on the revolving structure, a working table 40 attached to the tip of the boom 30 for a worker boarding, a travelling operation device 50 installed on the working table and operated by the worker, and a travelling control device to perform the travelling control of the travelling body according to the operation of the travelling operation device. The high elevation work vehicle comprises, in the travelling body, a travelling display device 60 to guide and display the travelling direction of the travelling body for the worker boarding on the working table. The travelling display device comprises guiding light irradiation devices 63-66 for emitting and displaying a light irradiation mark indicating the travelling direction on a road surface from the travelling body. The guiding light irradiation devices emit and display the light irradiation marks 63a-66a on the road surface in front of the travelling body in the traveling direction according to the travelling operation device.SELECTED DRAWING: Figure 6

Description

The present invention relates to an aerial work platform, particularly a traveling guidance device for an aerial work platform provided with a swivel body.

Driving safety is always required for aerial work platforms and general traveling vehicles. Therefore, various traveling guidance devices have been conventionally proposed. As an example, there is a road marking device described in Patent Document 1. This device is provided along the road on the side of the road, draws a band-shaped light display on the road to mark the boundary of the road, and aims for safe driving of the traveling vehicle in the event of snowfall or the like.

By the way, as an aerial work platform, for example, there is a self-propelled aerial work platform as described in Patent Document 2. This self-propelled aerial work platform is provided with a swivel body that can rotate horizontally on a traveling body that has running wheels on the front, back, left, and right, and a undulating and telescopic boom is attached to the swivel body, and a work table is attached to the tip of the boom. The worker on the workbench performs an operation to control the running of the traveling body.

In the self-propelled aerial work platform having such a configuration, when the turning body turns, the boom and the work table also turn, and the direction with respect to the running body changes. For this reason, when an operator on the workbench performs an operation to control the traveling of the traveling body, it is necessary to control the traveling of the traveling body while grasping the turning position, and it is necessary to pay attention to grasping the traveling direction. There was a problem that it was difficult to operate. Therefore, conventionally, a mark indicating a forward / backward direction is displayed on the upper surface, a side surface, or the like of a traveling body, and a worker on a work table looks at this to determine a traveling direction. ing. Further, as described in Patent Document 3, it has been proposed to provide light emitting display devices on the front, rear, left and right sides of the traveling body, and to turn on the light emitting display devices according to the traveling operation to display the traveling direction.

Japanese Patent No. 5982325 Japanese Unexamined Patent Publication No. 2017-75005 Japanese Unexamined Patent Publication No. 10-316397

However, the self-propelled aerial work platform has a configuration in which a swivel body is provided on the traveling body so as to be horizontally swivel, a boom that is undulating and expandable is attached to the swivel body, and a work table is provided at the tip of the boom. Since the position of the work table with respect to the running body changes greatly according to the turning of the turning body and the undulations and expansions and contractions of the boom, the operator on the work table indicates the running direction display mark on the running body and the running direction. There is a problem that it is often difficult to see the light emitting display device.

The present invention has been made in view of such a problem, and is a traveling guide that enables an operator who is on a work platform in an aerial work platform to easily recognize a traveling direction when performing a traveling control operation. The purpose is to provide the device.

In order to solve the above problems, the traveling guidance device for a high-altitude work vehicle according to the present invention can move up and down a traveling body, a swivel body provided on the traveling body so as to be horizontally swiveled, and the swivel body. An elevating device provided, a work table for a worker to be lifted and lowered by the elevating device, a traveling operation device provided on the work table and operated by a worker who boarded the work table, and a traveling operation device. It is a travel guidance device for a high-altitude work vehicle equipped with a travel control device that controls the travel of the traveling body according to an operation, and guides the traveling direction of the traveling body to a worker who is on the work table. The traveling display device for displaying is provided on the traveling body, and the traveling display device is composed of a guidance light irradiation device that irradiates and displays a light irradiation mark indicating a traveling direction on the road surface from the traveling body. In response to the operation of the traveling operation device, the light irradiation mark is irradiated and displayed on the road surface in front of the traveling body in the traveling direction.

In the traveling guidance device for a high-altitude work vehicle having the above configuration, preferably, when the traveling body is moved forward, the guidance light irradiating device indicates forward movement on the road surface in front of the traveling body in the forward traveling direction. When the traveling body is moved backward by irradiating and displaying the light irradiation mark, the light irradiation mark indicating the backward movement is irradiated and displayed on the road surface in front of the traveling body in the reverse traveling direction.

Further, in the traveling guidance device of the high-altitude work vehicle having the above configuration, preferably, when the traveling body is swiveled to the left or right while traveling forward, the traveling body is driven in the forward turning direction. When the light irradiation mark indicating the turning direction is illuminated and displayed on the road surface in front of the vehicle and the vehicle is rotated to the left or right while traveling in the reverse direction, the vehicle is in front of the vehicle in the backward turning direction. The light irradiation mark indicating the turning direction is illuminated and displayed on the road surface in addition to the reverse movement.

Further, in this case, it is preferable that the light irradiation mark indicating the forward and forward turning directions and the light irradiation mark indicating the backward and backward turning directions have different colors.

According to the traveling guidance device for aerial work platforms according to the present invention, the guidance light irradiation device irradiates and displays a light irradiation mark on the road surface in front of the traveling body in the traveling direction in response to the operation of the traveling operation device. It is possible to irradiate and display a light irradiation mark over a relatively large and wide range on the road surface ahead in the direction. Therefore, even if the position of the work table with respect to the traveling body changes significantly according to the turning of the turning body and the undulation and expansion / contraction of the boom, the worker on the work table displays the light irradiation mark irradiated on the road surface. It can be easily found, and the traveling direction of the vehicle can be easily and surely grasped.

In the traveling guidance device for the aerial work platform having the above configuration, when the traveling body is moved forward, a light irradiation mark indicating forward is illuminated and displayed on the road surface in front of the traveling body in the forward traveling direction, and the traveling body is moved backward. At that time, it is preferable to irradiate and display a light irradiation mark indicating the reverse movement on the road surface in front of the traveling body in the reverse travel direction. In this way, the operator on the work table can more easily and surely grasp the traveling direction.

Further, in the traveling guidance device of the aerial work platform having the above configuration, when the traveling body is made to turn to the left or right while traveling forward or backward, the traveling body is moved forward or forward to the road surface in front of the reverse turning traveling direction. It is preferable to illuminate and display a light irradiation mark that indicates the turning direction in addition to the reverse movement. As a result, not only the traveling direction but also the turning traveling direction can be easily and surely grasped during the turning traveling.

Further, in the above case, if the light irradiation mark indicating forward movement and the light irradiation mark indicating backward movement have different colors, the forward / backward movement direction can be surely grasped.

It is a side view of the aerial work platform provided with the traveling guidance device which concerns on this invention. It is a top view of the aerial work platform. FIG. 3A is an operation explanatory view of a traveling operation lever provided on the work platform in the aerial work platform, and FIG. 3B is an operation of a steering switch provided on the work table in the aerial work platform. It is explanatory drawing. FIG. 5 is a plan view showing a state in which the swivel table is turned 90 degrees to the right in the aerial work platform. It is a block diagram which shows the structure of the traveling display device provided in the aerial work platform. It is a top view explaining that the aerial work platform shows a state in which the swivel table is turned 90 degrees to the right, and a light irradiation mark indicating a traveling direction is irradiated and displayed on the road surface. It is explanatory drawing which shows the example of the light irradiation mark displayed on the road surface corresponding to the operation of the traveling operation lever and the steering switch in the aerial work platform.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 and 2 show the aerial work platform 1 using the traveling guidance device according to the present invention. First, the overall configuration of the aerial work platform 1 will be outlined with reference to these figures.

The aerial work platform 1 has a traveling body 10 having a pair of left and right rear wheels 12 and front wheels 13 on the vehicle body 11 and is provided on the vehicle body 11 so as to be horizontally swiveled by a swivel mechanism 15. A body 20 and a telescopic boom (hereinafter, simply referred to as "boom") 30 undulatingly supported on the upper part of the swivel body 20 via a foot pin 34, and a worker boarding attachment attached to the tip of the boom 30. It is configured to include a workbench 40.

A traveling motor for driving the front wheels (not shown) is provided inside the traveling body 10, and the traveling body 10 can be driven by rotationally driving the left and right front wheels 13 by the traveling motor. It has become. Further, the traveling body 10 is provided with a steering mechanism 17, and by changing the directions of the left and right rear wheels 12 by the steering mechanism 17, steering control (steering control) of the traveling body 10 can be performed. It has become.

The swivel body 20 is attached to the traveling body 10 by a swivel mechanism 15 so as to be horizontally swivel 360 degrees around a vertical axis. The swivel mechanism 15 has a swivel motor (not shown) in the traveling body 10, thereby driving the swivel mechanism 15 to horizontally swivel the swivel body 20. The boom 30 is configured by a nesting combination of a plurality of boom members, and the entire boom 30 is expanded and contracted in the axial direction by expanding and contracting a telescopic cylinder (not shown) provided inside the boom 30. be able to. Further, an undulating cylinder (not shown) is straddled between the swivel body 20 and the boom 30, and by telescopically driving the undulating cylinder, the entire boom 30 is centered on the foot pin 34 of the boom 30. It can be moved up and down in a vertical plane including the axis.

A vertical post 32 is pivotally supported at the tip of the boom 30 so as to swing in the vertical direction. The vertical post 32 is swing-controlled by a leveling mechanism 33 arranged between the vertical post 32 and the tip of the boom 30, and the vertical post 32 is always held in a vertical posture regardless of the undulation angle of the boom 30. It is composed. The workbench 40 is rotatably attached to the vertical post 32 via the workbench bracket 41. A swing motor (not shown) is provided inside the workbench bracket 41, and by rotating the swing motor, the entire workbench 40 is swung around the vertical post 32 (horizontal swivel movement). ) Can be made. Here, since the vertical post 32 is always maintained in a vertical posture as described above, as a result, the floor surface of the work table 40 is always held horizontally regardless of the undulation angle of the boom 30.

The workbench 40 is provided with an operation device 50 operated by an operator on board the workbench 40. The operation device 50 includes an undulation operation lever (not shown) for performing an undulating operation of the boom 30, an expansion / contraction operation lever (not shown) for performing an expansion / contraction operation of the boom 30, and a boom 30 (swivel body 20). A swivel operation lever (not shown) for performing a swivel operation and a swing operation lever (not shown) for swinging the work table 40 are provided. When the undulation operation lever is tilted, the undulation cylinder is expanded and contracted at a drive speed corresponding to the operation amount, and the boom 30 is raised or lowered. When the expansion / contraction operation lever (not shown) is tilted, the expansion / contraction cylinder is expanded / contracted at a drive speed corresponding to the operation amount, and the boom 30 is contracted or extended. When the swivel operation lever (not shown) is tilted, the swivel motor is operated at a drive speed corresponding to the operation amount, and the swivel mechanism 15 is driven to swivel the swivel body 20 horizontally with respect to the traveling body 10. As a result, the boom 30 attached to the swivel body 20 so as to be undulating and expandable also swivels horizontally. When the swing operation lever (not shown) is tilted, the swing motor is rotationally driven at a drive speed corresponding to the amount of operation, and the workbench 40 is swung (horizontally swiveled) around the vertical post 32. ..

As schematically shown in FIG. 3, the operating device 50 performs a traveling operation lever 51 for performing traveling operations (forward / backward traveling and traveling speed adjustment operation) of the traveling body 10 and steering operation of the traveling body 10. A steering switch 52 for this purpose is provided. When the traveling operation lever 51 is tilted forward or backward, the traveling motor for driving the front wheels is rotationally driven in the forward or reverse direction at a driving speed according to the operation amount to move the traveling body 10 forward or backward. At the stop position where the traveling operation lever 51 is in the upright state, the driving of the traveling motor is stopped, and the traveling body 10 is stopped. The traveling operation lever 51 is configured to be positioned at the stop position in a free state. Therefore, when the traveling operation lever 51 is released, it moves to the stop position, the driving of the traveling motor is stopped, and the traveling body 10 is stopped. A foot switch 55 (see FIG. 5) that is operated by the operator by stepping on the floor surface of the work table 40 is provided, and the operator operates the traveling operation lever 51 after stepping on the foot switch 55. Otherwise, the traveling motor will not be driven.

On the other hand, when the steering switch 52 is tilted to the left or right, the steering mechanism 17 is driven at a driving speed according to the amount of operation, and the directions of the left and right rear wheels 12 are changed to the left or right. 10 steering controls are performed. The steering drive is stopped at the position where the steering switch 52 is in the upright state, and the left and right rear wheels 12 hold the current steering position. The steering mechanism is not driven unless the operator operates the steering switch 52 after stepping on the foot switch 55. The steering mechanism 17 is provided with a steering sensor 67 (see FIG. 5) that detects the direction of the left and right rear wheels 12, that is, the steering direction.

As described above, since the high-altitude work vehicle 1 can tilt the turning operation lever to rotate the turning body 20 horizontally with respect to the traveling body 10, for example, the traveling body 10 is shown in FIG. The boom 30 is extended in the traveling direction (directions indicated by arrows F and R in FIG. 2), or the boom 30 is extended in a direction perpendicular to the traveling direction of the traveling body 10 as shown in FIG. Can be done. In the state of FIG. 2, the worker M boarding the workbench 40 is located on the workbench 40 so as to look at the operating device 40 in front of the traveling direction (directions of arrows F and R). In the state of FIG. 4, the worker M boarding the work table 40 looks at the operation device 50 on the right side of the traveling body 10 perpendicular to the traveling direction (directions of arrows F and R). Located on top of.

As shown in FIG. 3A, the operator M performs a traveling control by tilting the traveling operation lever 51 back and forth toward the operating device 50. Therefore, when the operator M tilts the traveling operation lever 51 back and forth in the state of FIG. 2, the traveling body 10 travels in the same direction as the tilting operation direction. On the other hand, when the operator M tilts the traveling operation lever 51 back and forth in the state of FIG. 4, the traveling body 10 travels in a direction orthogonal to the tilting operation direction. Therefore, if the operator M does not know the horizontal turning position of the turning body 20 and the boom 30 that is horizontally turned together with the turning body 20, the tilting operation direction of the traveling operation lever 51 and the traveling direction are different, which causes a sense of discomfort. There is a problem that there is. Since this discomfort changes according to the horizontal turning position of the turning body 20 and the boom 30, the operator M needs to operate the traveling operation lever 51 while grasping the horizontal turning position.

The traveling body 10 is provided with marks indicating the forward direction and the reverse direction thereof so that the traveling direction of the traveling body can be visually discriminated. For example, as shown in FIG. 1, a forward mark 14a indicating a forward direction and a reverse mark 14b indicating a reverse direction are provided on the left and right side surfaces of the vehicle body 11 of the traveling body 10. The forward mark 14a is, for example, a green mark, and the reverse mark 14b is a red mark, so that the forward and reverse directions can be known not only by the shape but also by the color. Similarly, as shown in FIG. 4, a green forward mark 14c indicating the forward direction and a red reverse mark 14d indicating the reverse direction are also provided on the upper surface of the vehicle body 11. Therefore, the worker M who got on the workbench 40 in the swiveled state as shown in FIG. 4 sees the green forward marks 14a and 14c and the red reverse marks 14b on the side and upper surfaces of the vehicle body 11 from above the workbench 40. The traveling direction of the traveling body 10 can be determined by looking at 14d.

However, for example, the forward mark 14c and the reverse mark 14d provided on the upper surface of the vehicle body 11 can only be seen from above in a swiveled state as shown in FIG. The forward marks 14a and 14c and the reverse marks 14b and 14d may not be visible depending on the turning position (for example, they cannot be seen from above in the state of FIG. 2), and there is a problem that they are often difficult to see from the workbench 40. In view of this, the vehicle body 11 is provided with the traveling guide device 60 according to the present invention. The traveling guide device 60 will be described below.

The schematic configuration of the traveling guide device 60 is shown in FIG. The travel guidance device 60 includes a travel guidance controller 61 that receives an operation signal from the travel operation lever 51, an operation signal from the steering switch 52, and an operation signal from the foot switch 55. A detection signal from the steering sensor 67 that detects the steering (steering) direction and amount of the left and right rear wheels by the steering mechanism 17 is also input to the traveling guidance controller 61. The travel guidance device 60 further includes an light mark irradiation device 62 for illuminating and displaying a light irradiation mark indicating a travel direction on the road surface under lighting control by the travel guidance controller 61. As shown in FIGS. 4 and 6, the light mark irradiation device 62 is provided with a right front light emitting display 63 provided on the right front side of the vehicle body 11, a left front light emitting display 64 provided on the left front side, and a right rear light emitting display 64. It has a right rear light emission display 65 and a left rear light emission display 66 provided on the left rear side.

As shown in FIG. 6, these four light emitting indicators 63 to 66 are adapted to illuminate and display light display marks 63a to 66a indicating the traveling direction on the road surface in front of each of them. The light display marks 63a and 64a that illuminate the front of the vehicle body in the forward direction to indicate the forward direction are displayed with green light, and the light display marks 65a and 66a that illuminate the front of the vehicle body in the reverse direction to indicate the reverse direction are red light. The display is made. The shapes of the light display marks 63a to 66a are not limited to those shown in FIG. 6, and may be any shape. These colors are not limited to those in which the forward direction is green and the reverse direction is red as described above, and any color may be used. However, it is preferable that the colors match the colors of the forward mark 14a and the reverse mark 14b displayed on the side surface of the vehicle body 11 and the forward mark 14c and the reverse mark 14d displayed on the upper surface of the vehicle body 11.

An example of irradiation display of these light display marks 63a to 66a is shown in FIG. First, when the traveling operation lever 51 is operated in the forward direction and the steering positions of the left and right rear wheels 12 by the steering switch 52 are in the straight direction (the steering positions of the left and right rear wheels 12 are detected by the steering sensor 67). That is, when the vehicle is controlled to travel straight forward, the illumination display of the light display mark shown in FIG. 7A is performed. That is, the right front light emitting display 63 and the left front light emitting display 64 illuminate and display the green light display marks 63a and 64a on the left and right front road surfaces in the forward direction of the vehicle body 11. When the travel operation lever 51 is operated in the reverse direction and the steering positions of the left and right rear wheels 12 by the steering switch 52 are in the straight direction, that is, when the steering switch 52 is controlled to drive in the reverse direction, FIG. 7B is shown. The illumination display of the light display mark shown in is performed. That is, the right rear light emitting display 65 and the left rear light emitting display 66 illuminate and display the red light display marks 65a and 66a on the left and right front road surfaces in the reverse direction of the vehicle body 11.

On the other hand, the traveling operation lever 51 is operated in the forward direction and is operated so as to turn left by the steering switch 52. The steering direction of the rear wheels 12 detected by the steering sensor 67 is rightward, and the vehicle makes forward left turning. Occasionally, the illumination display of the light display mark shown in FIG. 7 (c) is performed. That is, the left front light emitting display 64 illuminates and displays the green light display mark 64a on the road surface on the left front in the forward direction of the vehicle body 11. The traveling operation lever 51 is operated in the forward direction and is operated so as to turn right by the steering switch 52. The steering direction of the rear wheels 12 detected by the steering sensor 67 is leftward, and the vehicle makes a forward right turn. Occasionally, the illumination display of the light display mark shown in FIG. 7D is performed. That is, the green light display mark 63a is illuminated and displayed on the road surface on the right front side in the forward direction of the vehicle body 11 by the right front light emitting display 63.

Similarly, the traveling operation lever 51 is operated in the reverse direction and is operated so as to turn left by the steering switch 52, and the steering direction of the rear wheels 12 detected by the steering sensor 67 is leftward. At that time, the irradiation display of the light display mark shown in FIG. 7 (e) is performed. That is, the left rear light emitting display 66 illuminates and displays the red light display mark 66a on the road surface on the left front in the reverse direction of the vehicle body 11. The travel operation lever 51 is operated in the reverse direction and is operated so as to turn right by the steering switch 52. The steering direction of the rear wheels 12 detected by the steering sensor 67 is in the right direction, and the vehicle makes a reverse right turn. Occasionally, the illumination display of the light display mark shown in FIG. 7 (f) is performed. That is, the right rear light emitting display 65 illuminates and displays the red light display mark 65a on the road surface on the right front side in the reverse direction of the vehicle body 11.

As described above, in the traveling guidance device 60, the traveling direction of the traveling body 10 by the traveling operation lever 51 and the steering direction of the left and right rear wheels 12 determined by the operation of the steering switch 52 (turning traveling direction of the traveling body 10). In response to the above, the light emitting indicators 63 to 66 illuminate and display the light display marks 63a to 66a in front of the traveling body in the traveling direction. As described above, the traveling body 10 cannot be driven to travel unless the traveling operation lever 51 is operated after stepping on the foot switch 55. However, the light display marks 63a to 66a by the light emitting indicators 63 to 66a. It is preferable that the irradiation display of the above is performed only according to the operation of the traveling operation lever 51. That is, it is preferable to display the light display marks 63a to 66a by the light emitting indicators 63 to 66 regardless of whether the foot switch 55 is stepped on or not.

Since these light display marks 63a to 66a are displayed large on the road surface in front of the traveling body 10 in the traveling direction, the worker M boarding the work table 40 wears the light display marks 63a to 66a from above the work table 40. Easy to visually recognize. Therefore, the operator M can easily and surely grasp the traveling direction, and can accurately operate the traveling operation lever 51 and the steering switch 52.

The present invention is not limited to the above embodiment, and can be appropriately improved as long as it does not deviate from the gist of the present invention. For example, in the above-described embodiment, the object to which the present invention is applied is a work vehicle in which the traveling body is a tire-wheel type, but the traveling body is not necessarily limited to the tire-wheel type, and the traveling body is not necessarily limited to the tire-wheel type. It may be a traveling one.

Further, in the above-described embodiment, the elevating device mounted on the traveling body of the aerial work platform has been described by exemplifying a telescopic boom capable of undulating, expanding and contracting, and turning. There may be.

1 Aerial work platform 10 Traveling body 20 Swinging body 30 Boom (elevating device)
40 Worktable 50 Operation device 51 Travel operation lever 52 Steering switch 55 Foot switch 60 Travel guidance device 61 Travel guidance controller 62 Light mark irradiation device 67 Steering sensor

Claims (4)

A running body that can run and
A swivel body provided on the traveling body so as to be able to turn horizontally,
An elevating device provided on the swivel body so as to be able to elevate,
A workbench for boarding workers that is lifted and lowered by the lifting device,
A traveling operation device provided on the workbench and operated by a worker who boarded the workbench,
A travel guidance device for aerial work platforms, comprising a travel control device that controls travel of the traveling body in response to an operation of the travel operation device.
The traveling body is provided with a traveling display device that guides and displays the traveling direction of the traveling body to the worker who is on the work table.
The traveling display device is composed of a guide light irradiation device that irradiates and displays a light irradiation mark indicating a traveling direction on the road surface from the traveling body.
The guidance light irradiation device is a travel guidance device for aerial work platforms, which irradiates and displays the light irradiation mark on a road surface in front of the traveling body in a traveling direction in response to an operation of the traveling operation device. The guide light irradiation device irradiates and displays the light irradiation mark indicating forward movement on the road surface in front of the traveling body in the forward traveling direction when the traveling body is made to travel forward, and when the traveling body is made to travel backward, the light irradiation mark is displayed. The travel guidance device for a high-altitude work vehicle according to claim 1, wherein the light irradiation mark indicating reverse movement is irradiated and displayed on a road surface in front of the traveling body in the reverse traveling direction. When the traveling body is swiveled to the left or right while traveling forward, the guide light irradiating device puts the light irradiation mark indicating the turning direction on the road surface in front of the traveling body in the forward turning traveling direction in addition to advancing. When the traveling body is turned to the left or right while traveling backward, the light irradiation mark indicating the turning direction is displayed on the road surface in front of the traveling body in the backward turning direction. The traveling guidance device for a high-altitude work vehicle according to claim 1 or 2, wherein the device is characterized by the above. The traveling guidance device for an aerial work platform according to claim 2 or 3, wherein the light irradiation mark indicating the forward and forward turning directions and the light irradiation mark indicating the backward and backward turning directions have different colors. ..

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