JPH0639365Y2 - Connection structure of coupler in work vehicle - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a coupler connection structure for a work vehicle such as an agricultural tractor, a rice transplanter, or a combine harvester.

[Problems to be Solved by Prior Art and Invention] In general, some working vehicles of this type are capable of performing automatic control as well as manual control such as vertical ascending / descending movement control and horizontal inclination control of a working unit. There is something I did. Then, this is a manual or automatic control input unit so that signals from the manual and automatic control input units are input to the control unit and the control unit outputs a control signal to the operating unit based on the input signals. The operating unit and the operating unit are connected to each other via a control unit. Therefore, once the control unit has failed, the operation unit cannot be operated not only by the automatic control but also by the manual control, and as a result, if such a situation occurs, the work can be immediately continued. There is a fear of not being able to do it.

Therefore, as shown in Japanese Utility Model Application Laid-Open No. 57-89405, the coupler on the signal input side and the coupler on the signal output side are connected in a state where a circuit connection is made between the manual control input section and the corresponding operation section. We once proposed what was set so that they could be connected to each other, and solved the above problem, but it is not clear just where this is the failure, and individual circuit check and control section check to find the failure. There was a need, and lack of maintainability at the time of failure, and further improvement was needed.

[Means for Solving the Problem] The present invention was devised with the object of providing a connection structure for a coupler in a work vehicle that can eliminate these drawbacks in view of the above circumstances. hand,
In a working vehicle equipped with a control unit that outputs a necessary control signal to the operating unit and the monitor unit side based on the signals input from the manual and automatic control input units, each is connected to the control unit side. The coupler on the signal input side and the coupler on the signal output side are set so that they can be connected to each other, and the terminals provided on both couplers correspond to the manual control input section and the corresponding terminals when the couplers are connected. It is characterized in that it is arranged so that a circuit connection with an actuating unit and a circuit connection between a control input unit and a monitor unit different from the manual control input unit are made.

Further, according to the present invention, in this configuration, when the control section is out of order, the line between the manual control input section and the operating section is connected so that the working section can be manually controlled. .

[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, and a cultivating section 3 is attached to a rear side of the traveling machine body 1 via an elevating link mechanism 2. 4, 4a are front and rear wheels, 5 is a driver's seat, 6 is an operating panel, 7 is a hydraulic case, 8 is a solenoid valve for switching hydraulic operation, and 9 is a fender.

Reference numeral 10 denotes a storage portion arranged in the rear portion of the driver's seat 5, and the storage portion 10 is integrally formed with the left and right fenders 9. A lid 10a is provided in the storage unit 10 so as to be removable and openable, and the inside of the storage unit 10 has a partition plate 11a.
The control unit is divided into left and right by one, and one is formed in the tool storage chamber 11a and the other is formed by a microcomputer or the like.
12 and a control unit accommodating chamber 11b for accommodating switching means such as various switching dials 13a and switching switches 13b.

A lead wire 14 is extended from the control unit 12, and the lead wire 14 is branched and a male coupler 14a and a female coupler 14b are attached to the ends thereof. On the other hand, the lead wire 15 on the harness side is also branched, and a female coupler 15a and a male coupler 15b are attached to the ends thereof, respectively. And the control unit 12, by connecting the male coupler 14a and the female coupler 15a, respectively, and by connecting the female coupler 14b and the male coupler 15b, respectively, so that the circuit using the control unit 12 can be connected, thereby controlling. Part 12 is
Input various signals from switches such as switching switches and lever switches, and input parts such as sensors, and make judgments such as comparing the input signals with prestored data and responding to the judgment results. The control command is output to the respective operating parts of the lamp, buzzer, solenoid, etc. to perform necessary control operations such as lighting the lamp, sounding the buzzer, exciting the solenoid, etc.

Furthermore, in these couplers, the one on the harness side 15
The a and 15b can be connected to each other by male and female fitting, and in that case, the terminals to be joined correspond to the input side and the output side. That is, now, as shown in FIG. 9, the number of terminals of each coupler 15a, 15b is arranged in five rows and four rows in a row in an arrangement in which four corners are missing.
16 pieces. For convenience of the following description, each terminal is represented by A for the female coupler 15a and B for the male coupler 15b, followed by a two-digit number, "what column from the top" and "columns from the left" for the female coupler 15a. The order of "eyes" is added, and the male coupler 15b is added in the order of "what column from the top" and "column from the right". What was made different right and left here is that when both couplers are mated with each other,
This is because it corresponds to the connection of those having the same code.

And, for example, speaking of the terminal of A-23, female coupler 15
It means the second terminal from the top and the third terminal from the left. In this case, for example, terminal A-21 is connected to a lift rod extension switch, and terminal A-
31 is connected to a lift rod reduction switch. On the other hand, the terminal B-21 is connected to the lift rod expansion solenoid, and the terminal B-31 is connected to the lift rod contraction solenoid. Therefore, when both couplers 15a and 15b are connected, the terminal A-21 and the terminal B-21 are connected, and the terminal A-31 and the terminal B-31 are connected, and the line is closed. This is a circuit, which allows temporary extension and contraction of the lift rod without passing through the control unit 12.

Further, an analog display type working depth meter for displaying the working depth on the operation panel 6 when the working unit is the tilling working unit 3.
16 is provided as a monitor, but this working depth meter
16, the detection signal from the tilling depth detecting sensor 17 provided on the working unit 3 side is directly input to display the amount of tilling depth, whereby the input / output port of the control unit 12 is changed. It avoids wasteful use and can display the working depth even when the working depth control is OFF (during position control), and even in models that do not control by the micro computer,
By providing the plowing depth meter 16 and the plowing depth detecting sensor 17, the plowing depth amount can be easily displayed.

Further, this one is configured by two switching dials 13a stored in the control unit storage chamber 11b described above, but these dials 13a each have a stepwise set value (for example, as shown in the figure, It consists of potentiometers 13aa and 13ab that are adjusted to seven types). Then, the control unit 12 changes the tire size, the rear cover by adjusting settings from both the meters 13aa and 13ab, for example, by setting the meter 13aa and the meter 13ab by various combinations of input values. The conditions such as long / short switching, lower link wide / narrow switching, type of working machine, etc. are judged, and control corresponding to each is performed.

In the embodiment of the present invention configured as described above, the control unit 12 which receives the command from the switches 13 etc. outputs a corresponding control command to the operating unit side based on the input command, If the control unit 12 breaks down for some reason, a correct control command will not be issued from the control unit 12, and the work cannot be performed. In such a case, in the present invention, the couplers 15a and 15b connected to the couplers 14a and 14b on the control unit 12 side are pulled out to connect the both 15a and 15b. As a result, as described above, for example, the lift rod expansion / contraction line is a closed circuit on the input side and the output side, and if a manual control operation such as a corresponding lever operation is performed, a circuit that manually passes through the control unit 12 is not used. It is possible to perform temporary lift rod expansion and contraction work. Therefore, it is possible to perform manual work when the control unit 12 breaks down, and it is possible to surely avoid a problem in which it is necessary to give up during the work.

Furthermore, when the couplers 15a and 15b are connected to each other as described above, for example, the sharp sensitivity input terminal A-32 from the tilt sensitivity switching switch and the terminal for the working depth lamp output.
The B-32 and the B-32 are connected to each other, which facilitates the line check without the control unit 12. Therefore, when some kind of malfunction occurs, it is possible to easily determine whether the malfunction is in the control unit 12 or in any other part.

Needless to say, the present invention is not limited to the above-mentioned embodiment, and the line connected by the connection between the couplers is not limited to the circuit for manually controlling the tilt, but also the circuit for manually moving the working unit up and down. Any circuit, such as a circuit, can be used as long as it can selectively use both automatic and manual operation under the control of the control unit.

[Effects] In summary, since the present invention is configured as described above, the manual and automatic control of the operating unit can be performed by the output of the control command from the control unit based on the input signal from the control input unit. Even if it is possible, even if for some reason the control via the control unit is no longer possible, the manual control input can be made by connecting the couplers on the input and output sides that are connected to the control unit. A circuit is connected between the control section and the corresponding operation section, and it is possible to perform temporary control of the operation section by hand without passing through the control section.Therefore, it is necessary to give up the work on the way. You can definitely avoid it.

Moreover, by connecting the couplers to each other, a control input section different from the one connected to the circuit is connected to the monitor section. As a result, when an abnormality occurs, the check of the line that does not pass through the control section can be monitored. If the monitor unit operates, there is no abnormality in the circuit connection and there is an abnormality in the control unit side, if it does not operate, there is no abnormality in the control unit and circuit connection It is possible to judge that something is abnormal, and this makes it easy to determine the location of the failure, and it is possible to perform maintenance such as repairs quickly and appropriately.Therefore, a central control system method using a microcomputer This will ensure that safety measures can be taken in models that adopt.

[Brief description of drawings]

FIG. 1 shows an embodiment of a coupler connecting structure in a work vehicle according to the present invention. FIG. 1 is a side view of an agricultural tractor, FIG. 2 is a perspective view of essential parts, and FIG. , 4th
5 and 5 are a plan view, a front view, and a side view of the control section storage section,
FIG. 6 is a wiring circuit diagram through the control unit, FIG. 7 is a wiring circuit diagram without the control unit, FIGS. 8 and 9 are operation explanatory diagrams, and FIG.
A and B are explanatory views showing the terminal arrangement of the coupler, FIG. 10 is a wiring circuit diagram of the working depth sensor, and FIG. 11 is a flow chart showing control switching by the switching dial. In the figure, 1 is a traveling body, 3 is a working unit, 12 is a control unit, and 14a, 1
Reference numeral 4b is a coupler on the control unit side, and reference numerals 15a and 15b are couplers on the harness side.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location B60R 16/02 M 8012-3D

Claims (1)

[Scope of utility model registration request] 1. A working vehicle comprising a control section for outputting a necessary control signal to an operating section and a monitor section based on signals input from manual and automatic control input sections. The coupler on the signal input side and the coupler on the signal output side, which are respectively connected to each other, are set so that they can be connected to each other, and the terminals provided on both couplers have a manual control input section when the couplers are connected to each other. And a working section corresponding thereto, and a circuit connection between a control input section and a monitor section different from the manual control input section are arranged so that the circuit connection is made. Coupler connection structure.