JPH0840700A - Vehicle body inclination angle alarm device of work vehicle - Google Patents

Abstract

PURPOSE:To improve safety by outputting an alarm signal from a first controller when the inclination angle of a work vehicle reaches the angle within the regulation region, outputting an attention signal from a second controller when a vehicle body is inclined at an angle within a caution region provided in the vicinity of the regulation region at a usable region. CONSTITUTION:An inclination angle detecting sensor 19 is fitted to the vehicle body 11 of an elevated spot work vehicle 10, and its detection signal is inputted into a controller 20, and by means of a first controller 21 at the controller 20, an alarm signal is issued when the inclination angle theta of the vehicle body 11 exceeds a value less than about 3 deg. in a usable region where the travel of the vehicle body 11 and the operation of a boom can be conducted safely, and becomes more than about 3 deg. that is in a regulation range. Also, by means of a second controller 22, a first caution signal is issued by means of a first caution signal transmitter 23 when the inclination angle theta is within the range of about 1 deg.-1.9 deg., and a second caution signal is issued by means of a second caution signal transmitter 24 when the inclination angle theta is within the range of about 2 deg.-2.9 deg..

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body tilt angle warning device for a working vehicle which performs an alarming operation when the vehicle body tilt angle reaches an angle within the restricted area, and more particularly to an angle within the restricted area. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body inclination angle warning device for performing a caution operation.

[0002]

2. Description of the Related Art In an aerial work vehicle provided with a work device such as a boom which is capable of undulating and expanding and contracting on the vehicle body, stability of the vehicle body may be impaired particularly when the vehicle body leans when the boom is extended. For example, in an aerial work vehicle 10 as shown in FIGS. 1 and 2, the boom 16 is raised and extended as shown by a chain double-dashed line in FIG. . In such an aerial work vehicle 10, when the leaning angle of the vehicle body becomes 3 ° or more, the vehicle body may become unstable. Therefore, when the leaning angle of the vehicle body reaches 3 ° (the angle within the restricted area is When it happens), a buzzer sounds an alarm to alert the operator.

[0003]

In the aerial work vehicle 10 constructed as described above, the operator is on the work table 17 provided at the tip of the boom 16 and the operating device 30 is used. By operating, the traveling control of the aerial work vehicle 10 or the operation control of the boom 16 is performed. For this reason, it is difficult for an operator who has boarded the work table 17 to determine whether or not the inclination of the vehicle body is approaching 3 ° by the sensation. Therefore, when the inclination angle of the ground on which the vehicle is running changes, the alarm buzzer sounds and an alarm is issued when the worker is not working (running) and is not expecting,
Since it is necessary to temporarily stop the subsequent work and move the vehicle body so as to reduce the inclination of the vehicle body, there is a problem that smooth work is hindered.

The present invention has been made in view of such a problem, and informs the operator that the inclination angle of the vehicle body is close to the regulation area before the inclination angle of the vehicle body is within the regulation area. It is an object of the present invention to provide a body tilt angle warning device for a work vehicle that can perform the work.

[0005]

In order to achieve the above object, the vehicle body inclination angle warning device for a working vehicle according to the present invention is provided with a working device, in which the inclination angle of the vehicle body of the working vehicle is It is configured to perform an alarm operation when an angle within a restricted area is exceeded beyond a usable area where the vehicle body and the working device can be safely operated. Then, the first controller sends an alarm signal when the inclination angle of the vehicle body detected by the vehicle body inclination angle detecting means becomes an angle within the regulation area, and the vicinity of the alarm area in the usable area is set. At least one caution area is set, and the second controller transmits a caution signal when the inclination angle of the vehicle body reaches an angle within the caution area. The warning means receives the warning signal and performs the warning operation, and the caution means is configured such that the caution means receives the caution signal and performs the caution operation.

According to the vehicle body inclination angle detecting means of the work vehicle constructed as described above, when the inclination angle of the work vehicle exceeds the usable area where the work can be performed safely and falls within the restricted area, 1 Controller outputs an alarm signal. This alarm signal is input to the alarm means, and the alarm means issues an alarm with a warning buzzer or alarm lamp,
Some people give warnings by stopping the running of the car body. Then, the vehicle body inclination angle detecting means of this work vehicle performs the caution operation before the inclination angle becomes an angle within the regulation region. That is, when the vehicle body is tilted at an angle within the caution area provided near the restriction area in the usable area, the caution signal is output from the second controller. This caution signal is input to the caution means, and the caution means performs a caution operation with a buzzer having a different tone color from the alarm buzzer and a lamp having a different color from the alarm lamp. Furthermore, when a plurality of caution areas are set, different caution operations can be performed in several steps before the alarm operation is performed, and the operator can be more accurately notified of the inclination angle of the vehicle body.

[0007] Here, when the alarm operation and the caution operation by the alarm means and the caution means are performed by the audible signal, it is possible to surely call the operator's attention by transmitting different audible signals. . Note that examples of the audible signal include voices in addition to the above buzzer.
When the buzzer is used, the tone color is changed between the caution operation and the alarm operation, and when it is a voice, the inclination angle is specifically transmitted to the operator to ensure the inclination of the vehicle body. Can convey the angle.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows an aerial work vehicle (crawler vehicle) 10 which is an example of a work vehicle equipped with a vehicle body inclination angle warning device according to the present invention. The aerial work vehicle 10 includes a vehicle body 11, crawler belts 12 and 12 arranged on both left and right sides of the vehicle body 11, and hydraulic motors (not shown) that drive the crawler belts 12 and 12. It is configured. Then, by rotating and driving each hydraulic motor, each crawler belt 12, 12 is driven, and the vehicle body 11 is caused to travel.

A swivel base 15 is mounted on the upper part of the vehicle body 11 so as to be horizontally swivelable, and on the upper part of the swivel base 15,
A boom 16 that is telescopically (nested) and is configured to be telescopically attached is movably attached. A workbench 17 is attached to the tip of the boom 16 so as to always maintain a horizontal position, and an operating device 30 and an alarm device 31 whose details will be described later are attached to the upper inside of the workbench 17. There is. An operator can board the work platform 17 of the aerial work vehicle 10, and the operator operates the operating device 30 to operate the crawler belt 12,
By controlling the operation of the boom 12, the boom 16, etc., it is possible to move to an arbitrary height.

In the aerial work vehicle 10 constructed as described above, the vehicle body 11 can travel even when the boom 16 is raised and extended as shown by the chain double-dashed line in FIG. As shown, when the road surface on which the vehicle is traveling is a sloping ground, the moment M acts in the direction of overturning the vehicle body 11. Then, when the inclination of the vehicle body 11 increases, the moment M also increases and the vehicle body 11 becomes unstable.
Therefore, the aerial work vehicle 10 is provided with the following vehicle body inclination angle warning device to prevent the operation of the vehicle body 11 from becoming unstable.

As shown in FIG. 3, this vehicle body inclination angle warning device includes a vehicle body inclination angle detection sensor (vehicle body inclination angle detection means) 19
And a controller 20 and a buzzer 25. The vehicle body inclination angle detection sensor 19 is attached to the vehicle body 11 of the aerial work vehicle 10 and detects the inclination angle θ of the vehicle body 11 as shown in FIG. 1. The controller 20 is the first
It is composed of a controller 21, a second controller 22, a first attention signal transmitter 23, and a second attention signal transmitter. The first controller 21 exceeds the tilt angle θ of less than 3 °, which is the usable range in which the vehicle body can be safely operated and the boom can be operated safely, and the tilt angle θ of the vehicle body 11 is 3 ° or more, which is the restricted region. When it becomes, an alarm signal is sent. The second controller 22 includes a first attention signal transmitter 23 that transmits a first attention signal when the inclination angle θ is in the range of 1 ° to 1.9 °, and an inclination angle θ of 2 ° to 2. And a second attention signal transmitter 24 which emits a second attention signal when in the range of 9 °. The range of the tilt angle θ at which the attention signal is emitted from the first attention signal transmitter 23 and the second attention signal transmitter 24 is the attention region described in the claims, and in the present embodiment, the attention region is 2 The range has been set.

Each signal such as the alarm signal, the first attention signal and the second attention signal transmitted from the controller 20 is transmitted to the buzzer (alarm means, attention means) 25 and the buzzer 2
The tone color switching means 26 in 5 switches to a tone color corresponding to each signal and issues an alarm sound and a caution sound. Specifically, when the alarm signal is transmitted, the buzzer 25 sounds with a continuous tone, when the first attention signal is transmitted, the buzzer 25 sounds with an early intermittent tone, and when the second attention signal is transmitted. Makes the buzzer 25 sound intermittently. The controller 20 and the buzzer 25 are provided in the alarm device 31.

According to the vehicle body inclination angle warning device of the work vehicle constructed as described above, the inclination angle θ of the vehicle body 11 ranges from 0 ° to 0.
The buzzer 25 does not ring at 9 °. When the inclination angle θ is in the range of 1 ° to 1.9 °, the buzzer 25
Sounds intermittently with "Pi, Pi, Pi" and the tilt angle θ is 2
When it is in the range of ゜ to 2.9 ゜, the buzzer 25 sounds with a quick intermittent tone such as "pi, pi, pi, pi, pi". further,
When the inclination angle θ becomes 3 ° or more, the buzzer 25 keeps beeping. Accordingly, the operator can grasp how much the inclination angle θ of the vehicle body 11 is before reaching the regulation range of 3 ° or more by the timbre of the buzzer 25. Therefore, when traveling on a slope, Inclination angle θ is 3
The aerial work vehicle 10 can be driven by previously selecting a route that does not exceed 0 °. Therefore, it is possible to smoothly perform the work without the necessity of suddenly sounding the alarm buzzer during the traveling and suddenly stopping the traveling further.

In the above embodiment, two caution areas are set near the restriction area, but the present invention is not limited to this, and depending on the size of the usable area, Three or more attention areas may be set, or only one attention area may be set. Further, the warning operation and the caution operation are not limited to the operation by the buzzer as described above, and may be another audible signal such as voice. Furthermore, in performing the alarm and caution operations as described above, the same buzzer is used to switch between continuous sound and intermittent sound so that the operator can recognize it. The tilt angle may be recognized by the operator by using a separate buzzer or the like that outputs "pee" and "boo". Further, the alarm signal and the caution signal may be a visible signal such as a light emission signal other than the audible signal, or may be a combination of the audible signal and the visible signal. For example, when a light emission signal is used, the operator can recognize the tilt angle by changing the color of the lamp that emits light or changing the blinking interval.

[0015]

As described above, in the vehicle body inclination angle warning device for a working vehicle according to the present invention, the vehicle body inclination angle detected by the vehicle body inclination angle detecting means becomes an angle within the restricted area from the usable area. The first controller is configured to issue an alarm signal when the vehicle is in a closed state, and the second controller is configured to issue a warning signal when the inclination angle of the vehicle body reaches an angle within the attention area in the usable area. ing.
The warning means receives the warning signal and performs the warning operation, and the caution means is configured such that the caution means receives the caution signal and performs the caution operation.

According to the vehicle body inclination angle detecting means of the above construction, when the inclination angle of the work vehicle exceeds the usable area where the work can be performed safely and falls within the restricted area, The warning means warns the operator, and when the vehicle body tilts at an angle within the caution area, the caution means calls the operator's attention. Therefore, when the inclination angle changes as the work vehicle travels, the operator can grasp the inclination angle of the vehicle body before reaching an angle at which the vehicle body may become unstable. In addition, smooth work can be performed.

When the alarming and cautioning operations by the warning means and the warning means are performed by an audible signal such as a buzzer, the tone of the buzzer or the like is changed so that the operator can surely adjust the inclination angle of the vehicle body. Can be recognized.

[Brief description of drawings]

FIG. 1 is a view from the F direction in FIG. 2 of an aerial work vehicle provided with a vehicle body inclination angle warning device according to the present invention.

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

FIG. 3 is a block diagram showing a vehicle body inclination angle warning device for the work vehicle.

[Explanation of symbols]

 10 High-altitude work vehicle 11 Vehicle body 12 Crawler belt 16 Boom 17 Workbench 30 Control device 31 Alarm device

Claims (2)

[Claims] 1. A work vehicle in which a working device is provided on a freely movable vehicle body, and an inclination angle of the vehicle body exceeds a usable range in which the traveling of the vehicle body and the operation of the working device can be safely performed. A vehicle body tilt angle warning device for a work vehicle, which performs an alarm operation when an angle falls within a restricted area, wherein the vehicle body tilt angle detection means detects the tilt angle of the vehicle body, and the vehicle body tilt angle detection means detects the tilt angle. A first controller that issues an alarm signal when the inclination angle of the vehicle body reaches an angle within the restriction area, and at least one caution area is set near the restriction area in the usable area, A second controller that sends a caution signal when the tilt angle of the vehicle body detected by the vehicle body tilt angle detection means reaches an angle within the caution area; and the alarm from the first controller. And warning means for causing an alarm operated by receiving a signal, the said note signal work vehicle body tilt angle warning device characterized by comprising a care unit to perform a careful operation by receiving from the second controller. 2. The vehicle body inclination angle warning device according to claim 1, wherein the warning operation and the caution operation by the warning means and the caution means are an alarm and a caution operation by an audible signal.