JP2652299B2 - Work vehicle alarm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm device for a work vehicle which emits a sound and / or light alarm when a work vehicle such as a tractor, excavator, crane or the like is tilted more than necessary. .

[0002]

2. Description of the Related Art In general, work vehicles such as tractors, excavators, and cranes often work by only one driver. However, the conventional work vehicle has not been provided with a device for indicating the degree of inclination of the vehicle body.

[0003]

Therefore, even if the work vehicle is tilted more than necessary during driving, it has not been known whether the vehicle is in a dangerous state immediately before falling or a safe state in which the vehicle does not fall yet. If the work vehicle accidentally falls over, there is a problem that there is no means for notifying the outside of the vehicle and a large accident occurs.

According to the present invention, there is provided a device for notifying a driver of the degree of inclination when the vehicle body is tilted more than necessary while working with a work vehicle, and notifying the surrounding people of the fall when the vehicle falls. The purpose is to do so.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there are provided first and second tilt detecting devices arranged orthogonally to detect tilt angles of a working vehicle in all directions, and first and second tilt detecting devices. ; and a warning device that operates at the output of the tilt detection device, the first, second tilt detection apparatus, respectively provided rotatably a rotating disk in a housing, the rotating plate has a lower end portion of the peripheral edge To
Attach the weight and attach the first and
2 notches are provided, corresponding to between the first and second notches.
The housing at the position consists of a photocoupler,
First, second, and third sensors for detecting a floor inclination angle
Provided at predetermined intervals, and a braking device for braking the rotation of the turntable is provided, and the alarm device comprises a device for issuing a different alarm depending on the inclination angle, for a work vehicle. It is an alarm device.

[0006]

When the work vehicle is horizontal or slightly tilted during work, no alarm is issued. When tilting more than the first step, the first tilt detecting device is activated to notify the driver of an intermittent sound and a slight ramp with a specific ramp. Beyond the second stage, the second tilt detection device is activated to inform the driver of the continuous sound and that other ramps indicate that the driver has tilted considerably. When the dangerous state of the third stage is exceeded or tilted, the third tilt detecting device operates to emit a loud sound such as horn to notify the surrounding people.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, X is attached to a work vehicle 10 such as a tractor.
A first tilt detecting device 11 for detecting a tilt in a (for example, left-right) direction and a second tilt detecting device 11 for detecting a tilt in a Y (for example, front-rear) direction
And the inclination detecting device 12 are mounted. The first tilt detecting device 11 and the second tilt detecting device 12 are specifically configured as shown in FIGS. In these figures, a housing 13 composed of two plate members is provided in the middle of the housing 13 so as to face each other at a constant interval, and a rotating disk 14 is provided inside the housing 13 on the center rotating shaft 15 and the housing 13. It is rotatably provided by the bearing 16. A weight 23 is provided near the periphery of the turntable 14, and the weight 23 is always located below in a stationary state. At this time, a vertical line passing through the weight 23 and the rotation shaft 15 is defined as a center line 22. Further, a first notch 24 and a second notch 25 are formed at right and left sides of the center line 22 at the upper edge of the turntable 14, respectively, at a fixed angle, for example, 20 degrees. On the left and right sides of the center line 22 at the edge, a first detent 26 and a second detent 27 are formed, for example, at a position of 40 degrees, respectively, for preventing rotation over a certain amount.

The photodiode 2 is located at the upper end of the housing 13 and over the upper edge of the turntable 14.
A first sensor 17, a second sensor 18, and a third sensor 19, each of which includes a photocoupler of 0 and a phototransistor 21, are provided. Of these, the second sensor 18 is
Are located on the center line 22 in the stationary state, and the first sensor 17 and the third sensor 19
The positions are shifted by 0 degrees. A stopper 28 is provided at the lower end of the housing 13 on the center line 22 between the first detent 26 and the second detent 27. Further, a magnet is provided on both sides of the turntable 14 with a slight gap, and a braking device 29 of an electromagnetic braking system is configured by using the turntable 14 as a conductive object. The rotation is braked to prevent false signal output. The braking device 29 is not limited to the electromagnetic braking system, but may be, for example, an air braking system in which blades are formed on the rotating disk 14 or a liquid braking system in which a part or the whole of the rotating disk 14 is immersed in liquid. And so on.

FIG. 1 shows a control circuit. The output sides of the first sensor 17, the second sensor 18 and the third sensor 19 are provided with a waveform shaping circuit 30, a waveform shaping circuit 31, and a waveform shaping circuit 31, respectively. A first tilt output unit 4 via a circuit 32;
0, a second tilt output section 41, and a third tilt output section 42 are connected. The first tilt output section 40 is composed of one flip-flop circuit and two AND circuits, and has an output terminal 46 for right small tilt sound and right small tilt light and a left large tilt sound for left and right tilt sounds. An output terminal 49 for large oblique light is provided. The second tilt output unit 41 is composed of two AND circuits, and includes a left and right middle tilt sound output terminal 44, a right middle tilt light output terminal 47, and a left middle tilt light output terminal 50. ing. The third tilt output unit 42 is composed of one flip-flop circuit and two AND circuits, and has an output terminal 48 for large right tilt sound and right large tilt light and a left small tilt sound for left and right tilt sound. An output terminal 51 for smaller inclined light is provided.

The above is the case of the first tilt detecting device 11, but the second tilt detecting device 12 has exactly the same configuration.
Output terminals 46 and 51 of the first inclination detecting device 11;
The output terminals 46 and 51 of the second inclination detecting device 12 are connected via an OR circuit 60 to a time constant circuit 63, a waveform shaping circuit 64,
Pulse generation circuit 65, drive transistor 66, buzzer 6
7 are sequentially connected. The first tilt detecting device 11
The output terminals 44 of the second tilt detecting device 12 are directly connected to a drive transistor 66 and a buzzer 67 via an OR circuit 61. The output terminals 48 and 49 of the first inclination detecting device 11 and the output terminals 48 and 49 of the second inclination detecting device 12 are directly connected to a horn driving circuit 68 and a horn 69 via an OR circuit 62. .

The output terminal 4 of the first inclination detecting device 11
6, 47, 48, 51, 50, and 49 respectively include a small right tilt light 71, a right middle tilt light 73,
Large right tilt light 75, left small tilt light 72, left middle tilt light 7
4. It is connected to the left large tilt lamp 76. Similarly, the second
Output terminals 46, 47, 48, 5 of the inclination detecting device 12
Reference numerals 1, 50, and 49 denote a front small tilt lamp 77, a front middle tilt lamp 79, a front large tilt lamp 81,
Rear small tilt light 78, rear middle tilt light 80, rear large tilt light 8
2 are connected. It is assumed that the horizontal display lamp 70 is constantly lit or goes out when another lamp is lit.

The operation of the device configured as described above will be described. (1) Whether the body of the work vehicle 10 is stationary in a horizontal state,
Or, when the inclination in the front, rear, left and right is within 10 degrees In this case, the first sensor 17, the second sensor 18 of the first inclination detecting device 11 and the second sensor 18 of the second inclination detecting device 12,
The third sensors 19 are all shut off by the turntable 14. Therefore, the output of each point of a to o in FIG.
= H, b = H, c = H, d = L, e = L, f = L, g =
L, i = L, j = L, k = L, l = L, m = L, o = L
As a result, neither the buzzer 67 nor the horn 69 operates. Further, the lamps other than the horizontal indicator lamp 70 are not turned on.

(2) When the vehicle body of the work vehicle 10 is tilted to the right of the X axis (direction A in FIG. 4 when the rotation of the turntable 14 is considered, the same applies hereinafter) in a range of 10 to 20 degrees. The first notch 24 of the turntable 14 is the first sensor 1
7 and the second sensor 18, only the first sensor 17 of the first tilt detecting device 11 operates. Therefore, a = L, b = H, c = H, d = H, e = L, f =
L, g = H, i = L, j = L, k = L, l = L, m =
L, o = L. Since g = H, the output of the output terminal 46 for the right small tilt sound and right small tilt light 7
1 lights up. At the same time, the output of the output terminal 46 produces an output for a certain period of time from the time constant circuit 63 and the waveform shaping circuit 64, and a pulse is output from the pulse generation circuit 65 for this time, and the buzzer 67 generates an intermittent sound, Inform your hand that you are in a small tilt.

When the body of the working vehicle 10 is tilted in the range of 10 to 20 degrees to the left of the X axis (considering the rotation of the turntable 14 in the direction B in FIG. 4, the same applies hereinafter). The position of the notch 25 of 14 is first detected by the third sensor 19 and output from the output terminal 51. Other operations are the same as in the above (2), the small left tilt lamp 72 is turned on, and the buzzer 67 generates an intermittent sound.

When the body of the working vehicle 10 is tilted forward or backward of the Y axis within a range of 10 to 20 degrees. In this case, the front small tilting lamp 77 is substantially similar to (2). Alternatively, the rear small inclined lamp 78 is turned on, and the buzzer 67 generates an intermittent sound.

The vehicle body of the working vehicle 10 is as described in (2) above.
Other than, that is, to the right of the X axis, to the left of the X axis, to the front of the Y axis,
In the case where the lamp is inclined in the range of 10 to 20 degrees in the oblique direction by the combination of the rear of the Y axis.
2. Two adjacent small inclined front lights 77 and 78 are turned on, and the buzzer 67 generates an intermittent sound.

(3) When the vehicle body of the work vehicle 10 is tilted to the right of the X axis within a range of 20 to 30 degrees. In this case, the first notch 24 of the turntable 14 is
8 and the third sensor 19, a = L, b =
L, c = H, d = H, e = H, f = L, g = H, i =
L, j = H, k = H, l = L, m = L, o = L.
Since g = H and j = H, the output of the right small tilt sound / right small tilt light output terminal 46 and the right middle tilt light output terminal 47 provides the right small tilt light 71 and the right middle tilt light. The inclined lamp 73 is turned on.
At the same time, the output of the middle tilt sound output terminal 44 appears, so that the buzzer 67 emits a continuous sound to notify the driver that the vehicle is in the middle tilt state.

The vehicle body of the working vehicle 10 is set at 20 to the left of the X axis.
In this case, the position of the notch 25 is detected first by the third sensor 19 and then by the second sensor 18, so that the position of the notch 25 is The small inclined light 72 and the left middle inclined light 74 are turned on, and the buzzer 67 generates a continuous sound.

When the body of the working vehicle 10 is inclined forward or backward of the Y axis within a range of 20 to 30 degrees. In this case, the front small tilting lamp 77 Either the front middle inclined lamp 79 or the rear small inclined lamp 78 and the rear middle inclined lamp 80 are turned on, and the buzzer 67 generates a continuous sound.

The body of the working vehicle 10 is as described in (3) above.
Other than, that is, to the right of the X axis, to the left of the X axis, to the front of the Y axis,
When tilted in the range of 20 to 30 degrees in the oblique direction by the combination of the Y-axis rearward, in this case, the right small tilt light 71 and the right middle tilt light 73, the left small tilt light 72 and the left middle tilt light 74, small front slant lamp 77 and front middle slant lamp 79, rear small slant lamp 78 and rear middle slant lamp 8
Four adjacent ones of 0 are turned on, and the buzzer 67 generates a continuous sound.

(4) When the body of the work vehicle 10 is tilted 30 degrees or more to the right of the X axis. In this case, the first notch 24 of the turntable 14 is
9, a = L, b = L, c = L, d = H, e
= H, f = H, g = H, i = L, j = H, k = H, l =
L, m = H, and o = L. Since g = H, j = H, and m = H, the output terminal 4 for the small right tilt sound and right small tilt light
6, the right middle tilt light output terminal 47 and the right large tilt sound / right large tilt light output terminal 48 output the right small tilt light 71, the right middle tilt light 73, and the right large tilt light. 75 lights up. At the same time, the output of the output terminal 44 for middle tilt sound and the output terminal 48 for large right tilt sound and right large tilt light appears, so that the buzzer 67 outputs a continuous sound and the horn driving circuit 6
8, the horn 69 starts sounding continuously, and the driver as well as the surrounding people are in a large inclination state, that is,
Informs you that you are in danger or falling.

When the body of the working vehicle 10
In this case, since the position of the notch 25 is first detected in the order of the third sensor 19, the second sensor 18, and the first sensor 17,
In substantially the same manner as in (4), the left small tilt lamp 72, the left middle tilt lamp 74, and the left large tilt lamp 76 are turned on, and at the same time the buzzer 67 emits a continuous sound.
8, the horn 69 continuously sounds.

When the vehicle body of the working vehicle 10 is tilted by 30 degrees or more forward of the Y axis or backward of the Y axis. In this case, the front small tilting lamp 77 and the front middle tilting lamp are substantially similar to the above (4). 79 and a large front inclined light 81 or a small rear inclined light 78 and a middle rear inclined light 80 and a large rear inclined light 8
Two or three of the two lights up, the buzzer 67 emits a continuous sound, and the horn 69 continuously sounds by the horn drive circuit 68.

The vehicle body of the working vehicle 10 is as described in (4) above.
Other than, that is, to the right of the X axis, to the left of the X axis, to the front of the Y axis,
When tilted by 30 degrees or more in the diagonal direction based on the combination of the Y-axis in this case, in this case, the right small tilt light 71, the right middle tilt light 73, the right large tilt light 75, the left small tilt light 72, and the left Middle tilt lamp 74 and left large tilt lamp 76, front small tilt lamp 77 and front middle tilt lamp 7
9 and the front large tilt lamp 81, the rear small tilt lamp 78, the rear middle tilt lamp 80, and the rear large tilt lamp 82, which are adjacent to each other, are turned on, the buzzer 67 emits a continuous sound, and the horn drive circuit. 68 causes the horn 69 to sound continuously.

In the above-described embodiment, a device that emits sound and a device that emits light are provided as alarm devices, but only a device that emits sound may be used. Further, the first, second, and third sensors 17, 18, and 19 are not limited to photocouplers, and the operation angles are not limited to those in the above-described embodiment.

[0026]

(1) A method for detecting a plurality of levels of inclination angles
Since the first, second and third sensors are provided at predetermined intervals,
Or steer by one person, is a work vehicle 10 to operate and issued a different warning in response to the inclination angle is inclined more than a predetermined angle, to prevent accidents before they happen let me know whether it is safe for the people of the driver and the surrounding it can. (2) Even if the work vehicle 10 falls, the surrounding people are immediately notified of the fall, so that a major accident such as a vehicle fire or death accident can be prevented. (3) It can be easily attached to a commercially available work vehicle 10. (4) Since the first and second tilt detecting devices are arranged orthogonally to each other, the tilt angles of the work vehicle in all directions can be detected and the tilt direction can be displayed. (5) The first and second tilt detecting devices are first and second multi-stage tilt angle detecting first and second stages each including a rotating disk provided in a housing, a weight at a peripheral portion of the rotating disk, a notch, and a photocoupler . ,
The first, second, and third sensors have a plurality of independent rotation angles of the turntable with the inclination of the work vehicle 10 because of the three sensors.
It is detected by an optical signal in capacitors. Therefore, the tilt angle of the work vehicle is accurately reflected on the angle of the turntable, and the angle detection is accurate and reliable. (6) Since a braking device for braking the rotation of the turntable is provided, it is possible to suppress the malfunction of the work vehicle 10 due to the inclination at the time of starting, vibration during running or work, or other sudden movements. Can be operated only when the working vehicle is tilted. (7) The turntable has a weight attached to the lower end of the peripheral portion, and first and second detents are formed at the lower end of the peripheral portion at the same left and right angles with respect to a vertical center line. By providing a stopper in the housing corresponding to the center position of the turntable, a mechanism for limiting the rotation angle of the turntable is formed, so that the work vehicle may be tilted beyond the limit or the top and bottom may be completely inverted. Even if it does, the turntable keeps the state locked by the rotation stopper and the stopper. Thus, the alarm device can continuously issue an alarm indicating an abnormal state.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram showing an embodiment of a work vehicle alarm device according to the present invention.

FIG. 2 is a plan view of a tractor equipped with a work vehicle alarm device according to the present invention.

FIG. 3 is a side view of the sensor.

FIG. 4 is a front view of the sensor with a cover removed.

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical indication location G01C 9/12 G01C 9/12 P G08B 21/00 G08B 21/00 A

Claims (2)

(57) [Claims] 1. A first and a second inclination detecting device arranged orthogonally to detect inclination angles of a work vehicle in all directions,
An alarm device that operates on the output of these first and second tilt detecting devices, wherein the first and second tilt detecting devices are:
A rotatable disk is rotatably provided on each housing, and the rotatable disk has a weight attached to a lower end of a peripheral portion, and an upper end of the peripheral portion.
First and second cutouts are provided on the left and right of the section, respectively.
The housing is located at a position corresponding to the position between the second cutouts.
It consists of a top coupler and detects the tilt angle in multiple stages.
The first, second, and third sensors are provided at predetermined intervals, and a braking device that brakes the rotation of the turntable is provided,
The alarm device for a work vehicle, wherein the alarm device is configured to issue a different alarm depending on an inclination angle. 2. A first and a second detent are formed at the lower end of the periphery of the turntable at the same angle on the left and right with respect to a vertical center line, respectively, and these first and second detents are formed. The alarm device for a work vehicle according to claim 1, wherein a stopper is provided in the housing corresponding to a center position to form a mechanism for limiting a rotation angle of the turntable.