JPH0748003Y2 - Position set device for field working machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a position set device in a field working machine such as an agricultural tractor.

[Problems to be Solved by Prior Art and Invention] Generally, in this kind of field work, as in the case of an agricultural tractor, the height of the working portion is automatically controlled so as to correspond to the set position of the position lever. There are things that I was able to do. However, in this product, when the height of the working part and the position of the position of the position lever are different at the time of starting when the key switch is turned on, the working part suddenly moves up and down to the height corresponding to the position of the position of the position lever. In order to avoid the risk of accidental movement, make sure that the work lever cannot be moved up and down even if the lever is operated only after the position lever has been set to the position set position corresponding to the height of the work unit. To ensure safety.

However, conventionally, at the time of starting, it is often difficult to judge whether or not the position lever is set to the position set position, and even if the lever is operated to set to the position set position, the position lever is set. It is not clear whether the position set is in the position set position or not, which makes the position set operation difficult and extremely complicated, and in some cases, the working part suddenly moves up and down, causing a malfunction. There is a drawback that it is dangerous, and it is a problem.

Therefore, as disclosed in Japanese Unexamined Patent Publication No. 61-28307, it is also proposed to turn on an alarm lamp when the position lever is not set to the position set position at the time of starting. At the time of starting, the warning lamp when it is judged that it has been set to the position set position remains off, there is no change as in the state before starting, and as a result, the warning lamp does not light up. Means that the alarm lamp is not turned on because the alarm lamp is off, in addition to being set to the position set position, which is unreliable.

[Means for Solving the Problem] The present invention was devised with the object of providing a position set device for a field working machine capable of eliminating these drawbacks in view of the above circumstances. The height control of the working unit provided on the traveling machine body must be performed after it is determined that the position lever has been set to the position set position corresponding to the working unit height when the key switch is turned ON. The control mechanism configured to be unable to perform is controlled to give different notifications based on the determination whether the position lever is set to the position set position or set to a different position at the time of starting, In addition, if the position lever is set to a position different from the position set position, the position of the position lever Informing means controlled so made different Te cowpea the amount of deviation from the bract position is characterized in that is provided.

With this configuration, the present invention enables the position operation of the position lever to the position set position at the time of starting.
It is so arranged that appropriate notification from the notification means can be made extremely easily and reliably in a reliable state.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling machine body of an agricultural tractor, to which a working section (rotary tilling section) 2 is connected via a lifting link mechanism 3. And the working unit 2
As in the conventional case, the vertical movement of the lift case 6 interlocked with the hydraulic operation of the hydraulic case 5 provided on the upper surface of the transmission case 4 allows the vertical movement. 3a is a lift rod that connects the tip of the lift arm 6 and the lower link 3b of the lifting link mechanism 3, 7 is a driver's seat, 8 is a rear wheel, and 9 is a fender.

Reference numeral 10 denotes a position lever provided in the control operation unit 11 of the fan 9 and a lever position detection sensor 12 for detecting the set position of the position lever 10 is provided at the base of the position lever 10. On the other hand, 13 is an arm angle detection sensor for detecting the swinging angle of the lift arm 6, that is, the height of the working unit 2, and the detection signals from these sensors 12, 13 are installed in the lower part of the control operation unit 11. It is adapted to be input to the control unit 14 configured by the above-described micro computer or the like. Then, as will be described later, the control unit 14 issues a switching control command to the solenoid valves 15 and 15a for raising and lowering the lift arm 6 based on these detection values, and also to the alarm 16 of the buzzer system. It is designed to issue control commands.

The control unit 14 further controls automatic plowing depth control for controlling the plowing depth to a set shallow depth, and automatic tilt control for controlling the tilting state of the working unit 2 with respect to the machine body. Although the means are set, these explanations are omitted here, but the actuators of these control means work together with the actuator of the height control mechanism at the time of starting when the key switch is turned ON, and the position set of the position lever described later is started. If it is not done, it cannot operate. Further, in the drawing, lamps such as a set lamp 17, an automatic tilt lamp 18, a shallow tillage lamp 19, a standard lamp 20 and a deep tillage lamp 21 are provided on the control panel 22 as monitor lamps showing their control status. In the present embodiment, the notification device 16 is set to perform optical notification by the set lamp 17 in addition to voice notification by the buzzer method. Reference numeral 23 is a key switch provided on the control panel 22.

Then, these control procedures will be described in more detail with reference to a flow chart and a timing chart. First, when the key switch 23 is turned on to start (start), data read is performed and initial data is read. And the arm angle detection sensor 13
Is normal and whether the detection value A is input (YES) or not (N
O) is determined, and if it is normal, it is further determined that the lever position detection sensor 12 is normal and whether the detection value B is input (YES) or not (NO), and both are normal. If the key switch 23 is turned on, at start-up (start of operation)
(YES) or not (NO). Here, when at least one of the sensors 12 and 13 has an abnormality and the detection value A or B is not input, the set lamp 17 blinks to notify the operator of the abnormality and the solenoid valves 15 and 15a are turned on. It is controlled to the OFF state, and the vertical movement of the working unit 2 is restricted.

Further, when it is determined as NO because it is not at the time of starting, that is, when it is determined that the position set described later is formed and the vehicle is in operation, the detection by the arm angle detection sensor 13 and the lever position detection sensor 12 It is judged whether or not the values A and B are equal (A = B, but actually equal when there is some dead zone), and if they are equal (YES), the set position of the position lever 10 is set. And the height of the working unit match, the solenoid valves 15 and 15a are controlled to the OFF state as they are. On the other hand, if the detection values A and B are not equal and NO is determined, then the detection value B of the lever position detection sensor 12 is changed to the detection value A of the arm angle detection sensor 13.
Is larger (B> A), it is larger, that is, when the position lever 10 is set to a position higher than the position corresponding to the height of the working unit 2, YES is set and the solenoid valve 15 on the rising side is set. Is switched to raise the working unit 2, and when it is not large, that is, when the position lever 10 is set to a position lower than the height corresponding position of the working unit 2, the lower solenoid valve 15a is switched to NO. The working unit 2 is lowered by the above-mentioned method, and the height of the working unit 2 corresponding to the set position of the position lever 10 is automatically controlled (position control) during the field work.

On the other hand, if it is determined at the time of starting (YES) in the determination as to whether it is at the time of starting as described above, the position lever 10
It is necessary to carry out the position setting of the above. In the control section 14, first, both detection values A and B are equal (A = B), and again in the state where the dead zone exists, This dead zone is different from the dead zone, and it is better if it is large so that the set can be performed easily.)
Since the position set is performed, it is assumed that the system is in operation, and the control unit 14 outputs a continuous buzzer sound to the alarm 16 for a predetermined time (for example, several seconds) and the set lamp 17 is continuously turned on. It is set to issue a control command so that the notification can be made.

On the other hand, if the detection values A and B are not equal and the position lever 10 is not located at the position set position which corresponds to the height of the working portion and NO is determined, the detection value B and the detection value are determined. It is determined whether or not the difference from A is smaller than the first detection difference C (for example, 10 degrees) (| B−A | <C). For the alarm 16,
A buzzer sounds intermittently at small intervals as shown by section X in FIG. 5 (set lamp 17 also flashes at small intervals). A control command is issued to give the first notification.
If it is determined that the difference between the detection values A and B is smaller than the second detection difference D (for example, 20 degrees) set to a value (C <D) larger than the first detection difference C ( If | B-A | <D) is judged, and if YES is judged because it is small, an intermittent buzzer sounds at an intermediate interval as shown by section Y in FIG. The same applies to trump 17) A control command is issued to perform the second notification, and if it is judged to be NO because it is not small, the buzzer sounds intermittently at large intervals (same for settrump 17) The control command is set to issue a notification (section Z in FIG. 5). Thus, when the set position of the position lever 10 deviates from the position set position, the position Although a different set notification is issued than when it was set, Further, in the embodiment, the set notification is set to be changed stepwise depending on the size of the deviation, and this set notification is interrupted as the position lever 10 approaches the position set position. It is set to change uniformly so that it becomes smaller. In this case, the solenoid valves 15 and 15a are both set to the OFF state so that the working unit 2 does not move up and down.

In the embodiment of the present invention constructed as described above, it is necessary to set the position lever 10 to the position set position corresponding to the height of the working portion 2 after the key switch 23 is turned on. In that case, in the present invention, the alarm device
Buzzer sound emitted from 16 (or set lamp 17 lighting,
By identifying (blinking), the set state of the position lever 10 can be immediately known.

That is, in the embodiment of the present invention, when the position of the position lever 10 is set to the position set position corresponding to the height of the working part at the time of starting when the key switch 23 is turned on, the control part 14 Detection value A from both sensors 12, 13
Based on the comparison judgment of B, if these are equal, a continuous buzzer sound will be emitted from the annunciator 16 for a predetermined time, and if not set, both detection values A and B are not equal, and an alarm is given. The intermittent buzzer sound is continuously emitted from the vessel 16. Therefore, the worker can immediately recognize whether the set position of the position lever 10 is at the position set position or not by distinguishing the continuous and intermittent buzzer sounds. If the position is not set, the position lever 10 may be operated to set the position to the position set position. When the position is set by this lever operation, the buzzer sounds continuously from the intermittent sound. Since the sound is changed, the operator can immediately recognize that the position has been set, and can perform necessary operations thereafter.

In the case where the present invention is implemented in this way, at the time of starting when the key switch 23 is turned on, it is determined whether or not the position lever 10 is set to the position set position corresponding to the working portion height. It is possible to identify quickly and surely by different kinds of set notifications other than non-notification, and if it is not set, if the position is set by operating the lever, the notification will be different at that point. The operator is informed of this, and accordingly, the operator only has to perform the position set while listening to the different notifications, and the position set operation is extremely fast and reliable, and highly safe with no erroneous operation. Will be possible.

In addition, when the position set is not made, a further different notification is made depending on the lever position, so that the operator can make a notification of the position lever by this different notification.
It is possible to recognize how far 10 is from the position set position, and this can be used as a guide when performing the position set operation, and the ease of the set operation can be further improved.

Moreover, in this notification system, the closer the position lever 10 is to the position set position, the shorter the intermittent buzzer sound, so the direction of lever operation during position setting can be recognized at intervals. There is no need to operate the lever on the opposite side.

Moreover, even when the position is set to the position set position at the time of starting, a continuous buzzer sound is emitted for a predetermined time, and it is possible to clearly distinguish it from the non-notification state when the notification means is broken. By listening to the continuous buzzer sound, it is possible to recognize that there is no malfunction in the notification means and that the alarm has been set to the position set position, and it is possible to move to the next work with peace of mind.

Needless to say, the present invention is not limited to the above-described embodiment, and the point is to determine whether the position lever is set to the position set position or a different position at the time of starting. If the position is controlled to give different notifications other than non-reporting, and the position lever is set to a position different from the position set position, the position information of the position lever is shifted from the position set position. Any notification method may be used as long as the control mechanism is provided with a notification means that is controlled so as to be different depending on the amount, and as shown in the embodiment, the monitor lamp ( An optical system may be notified by a set lamp), and in the case of voice, an appropriate sound such as an electronic sound can be adopted instead of a buzzer sound.

Then, when the position notification when the position lever is deviated from the position set position is controlled so as to be further varied depending on the amount of deviation from the position set position, it is changed uniformly as it approaches the position set position. If it does, the position set operation will be easier, but in the case of voice notification, in addition to the unified change such that the signal interval of the notification sound is gradually reduced as it approaches the position set position, On the other hand, there are those that change the interval to gradually increase, those that change the strength of the sound gradually, and those that change the pitch of the sound gradually. Is
The blinking interval is changed gradually, the intensity of light is changed gradually, the color is changed, for example, red → yellow → green, or the number of lighting lamps is changed. The above-mentioned ones can be used alone or in combination.

[Effects] In short, since the present invention is configured as described above, there is a case where the position lever is set to the position set position and a case where the key lever is not set when the key switch is turned on. However, different notifications other than non-notification will be made, and as a result, the operator can quickly and surely know at what position the position lever is currently set by simply distinguishing these different notifications. Can be determined.

Moreover, even when the position lever is already at the set position at the time of starting, a notification other than the non-notification is given, and as a result, when the notification that the position is at the set position is given. However, this notification means that it is possible to positively eliminate the possibility that the notification means is out of order, and thus the notification that it is in the set position is the same as before the start. There is no anxiety about whether the notification means is out of order like a passive one that remains in the notification state, and it is possible to move to the next work with peace of mind.

And, if the position lever is not set to the position set position, it is necessary to set it to the position set position, but in this case also, a different notification will be given when the set operation is matched. Thus, the operator can recognize by sound that the position lever has been set. As a result, the set operation of the position lever at the time of starting can be performed extremely quickly and reliably by the auditory judgment of distinguishing these different notifications, and it is extremely safe without erroneous operation. You will be able to

Moreover, the notification when the position lever is set to a position different from the position set position differs depending on the amount of deviation from the position set position, and as a result, the operator is notified of this different notification. This allows you to hear the amount of displacement of the position lever,
Since the set operation of the position lever to the position set position can be performed while listening to the notification corresponding to the deviation amount, there is an advantage that it is extremely easy and the workability is greatly improved.

[Brief description of drawings]

The drawings show an embodiment of a position setting device in a field working machine according to the present invention. Fig. 1 is an overall side view of an agricultural tractor, Fig. 2 is a perspective view of essential parts, and Fig. 3 is a perspective view. Is a front view of the control panel, FIG. 4 is a block diagram of the control mechanism, FIG. 5 is a timing chart, and FIG. 6 is a flow chart. In the figure, 1 is a traveling machine body, 2 is a working unit, 10 is a position lever, 12 and 13 are sensors, 14 is a control unit, and 23 is a key switch.

Continuation of the front page (72) Hideya Matsuno Inventor Hideya Matsuno 667 Isuyacho, Higashi-Izumo-cho, Yatsuka-gun, Shimane 1 Inside Mitsubishi Agricultural Machinery Co., Ltd. (56) Reference JP-A-61-28307 (JP, A) JP-A-53- 750015 (JP, A) Actual development Sho 60-77309 (JP, U) Japanese Patent Sho 57-34763 (JP, B2) Japanese Official Sho 59-39083 (JP, B2)

Claims (2)

[Scope of utility model registration request] 1. The height control of the working unit provided on the traveling machine body is determined at the time of starting with the key switch turned on, that the position lever is set to the position set position corresponding to the working unit height. The control mechanism configured so that it can be performed only afterwards is provided with a mutual non-notification based on the judgment whether the position lever is set to the position set position or a different position at the time of starting. The notification is controlled to give different notifications, and the notifications when the position lever is set to a position different from the position set position differ depending on the amount of deviation of the position lever from the position set position. A position set device in a field working machine, which is provided with an informing unit controlled as described above. 2. The different notification when the position lever of the notification means is not located at the position set position is such that as the position lever approaches the position set position, the notification interval, strength, or height is unified. 2. The position set device for a field working machine according to claim 1, wherein the sound notification is changed to the above, or the light notification is changed such that the notification interval, the intensity, or the hue is changed in a unified manner.