JPH0117974Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a handling depth control device in a combine harvester having an automatic direction control device.

Conventionally, this type of seed handling depth control device uses a grain culm sensor or the like located in a grain culm conveying device as an operating switch, and the control device is activated or stopped by turning the switch on or off. For this reason, it was easy to handle the work in detail at the beginning of the work, and the number of sensors increased, causing an increase in costs.

Therefore, the present invention provides a self-holding circuit that activates the handling depth control circuit based on the handling depth sensor after a predetermined delay by a timer when the direction sensor detects the grain culm, and also activates when mowing is stopped. It is an object of the present invention to provide an automatic control device for a combine harvester, which is constructed so that the self-holding circuit is released by a switch, and which eliminates the above-mentioned drawbacks.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the combine 1 has a fuselage 2
A large number of dividers 3 are installed in front of the divider 3a, and a direction sensor 5 consisting of a double-sided sensor is installed at the left end, that is, the uncut end of the divider 3a. The direction sensor 5 is a divider 3a
It has a sensor arm 6 protruding from both sides of the arm 6, and when the grain culm comes into contact with the right side protrusion of the arm 6, the left turning command switch 7 is turned on, and when the grain culm comes into contact with the left side protrusion. When it makes contact, the right turn command switch 9 is turned on (see second reference). Furthermore, a grain culm conveying device 10, a handling depth adjustment device 11, a handling barrel 8, etc. are arranged in the fuselage 2, and near the handling depth adjustment device 11, a shallow handling command switch 12 and a deep handling command switch 12 are arranged. A handling depth sensor 15 consisting of a switch 13 is arranged.

As shown in FIG. 2, each switch 7,
9, 12, 13, a left solenoid 16l and a right solenoid 16r of solenoid valves that operate the left and right side clutches, and a control motor 17 that adjusts the handling depth adjusting device 11. In addition,
In the figure, 19 is a main switch, 20 and 20 are lever switches operated by a side clutch lever,
21 is a reaping clutch switch, 22 is a travel clutch switch, and 23 is a main depth of handling switch. Further, 24 and 25 are relays that operate normally open contacts 24a, 24b and 25a, 25b, respectively. Furthermore, 26 is a timer relay, which operates the instantaneous operation normally open contact 26a and the time-limited operation normally open contact 26b, and 27 is a relay, which operates the normally closed contacts 27a, 2.
7b is actuated, and 29 is a timer relay, which actuates time-limited normally open contacts 29a and 29b. Further, 30 is an upper limit stop switch, and 31 is a lower limit stop switch.

Since the present embodiment has the above-described configuration, in order for the combine harvester 1 to perform reaping work, the main switch 19, lever switches 20, 20, reaping clutch switch 21, travel clutch switch 22, and handling depth main switch 23 must all be turned on. Turn on. When the machine body 2 has not yet entered the row and is in the pre-mowing state, both switches 7 and 9 of the double-sided direction sensor 5 are in the OFF state, and the relay 2 is in the OFF state.
4, 25 are not energized, therefore contacts 24b, 25
b is in the off state, and the timer relay 26 is in the inactive state. Therefore, the contact 26b is in an OFF state, and the working depth control circuit C based on the working depth sensor 15 is kept in an inactive state. Then, when the combine 1 enters the row and either the right or left switch 7, 9 of the direction sensor 5, for example the switch 7 for left turn command, is turned on, the relay 24 is energized, turning on the contact 24a and turning on the left solenoid. 16l is energized and the combine 1 is corrected to the left. At the same time, the contact 24b is turned on to operate the timer relay 26, which instantly turns on the contact 26a for self-holding. Therefore, after a predetermined delay time after the operation of the timer relay 26, that is, a predetermined time after the grain culm is harvested and reaches the handling depth adjustment device 11 via the conveying device 10, the contact 26b is turned on and the handling depth control circuit C is turned on. becomes operational. In this state, when the deep handling command switch 13 is turned on, the contact 2 is passed through the relay 27.
7a and 27b are turned on, the control motor 17 is rotated in the forward direction to adjust the handling depth adjustment device 11 in the deep handling direction, and when the shallow handling command switch 12 is turned on, the contact is activated via the timer relay 29. 29a, 2
9b is turned on, the motor 17 is rotated in the opposite direction, and the handling depth adjusting device 11 is adjusted in the shallow handling direction. When the combine 1 reaches the edge of the field and the reaping work for the stroke is completed, the side clutch lever is activated to turn off the lever switch 20, or the other reaping clutch switch 21 and travel clutch switch 22 are turned off. . Then, the power to each switch 7, 9 of the direction sensor 5 is cut off, the automatic direction control operation is stopped, and at the same time, the contact 26a
The self-holding of the timer relay 26 is released and the contact 26b is turned off, and the power to the handling depth control circuit C is cut off, and the handling depth adjustment device 11 stops in the same state. be done.

Next, other embodiments will be described based on FIGS. 3 and 4. Note that the same parts are given the same reference numerals and the description thereof will be omitted.

As shown in FIG. 3, in the combine harvester 1 of this embodiment, a direction sensor 5' consisting of a side sensor is disposed on the divider 3b at the right end, that is, the already-cut side end. The sensor 5' has a sensor arm 6' projecting inwardly and biased into the upright position as shown. When the arm 6' does not come into contact with the grain culm or comes into shallow contact and is within the rotation range A, the left turning command switch 7' is turned on, and the arm 6' comes into deep contact with the grain culm and is within the rotation range A. When it is in the rotation range B, the clockwise rotation command switch 9' is turned on, and when it is in the rotation range B, both switches 7' and 9' are turned off.

As shown in FIG. 4, each switch 7',
9', and left and right solenoids 16l, 16r, main switch 19, lever switches 20, 20, reaping clutch switch 21, traveling clutch switch 22, main switch 23, each switch 12, 13 of handling depth sensor 15, relay 27, 2
A handling depth control circuit C consisting of a control motor 17, a control motor 17, etc. is connected thereto. In the figure, 32 is a relay that operates a normally open contact 32a, 33 is a timer relay that operates instantaneous normally closed contacts 33a, 33b, and time-limited normally open contact 33c, and 35 is a timer relay that operates a time-limited normally open contact 33c. The normally open contact 35a is operated, and 36 is a relay that operates the normally open contact 36a.
Furthermore, 37 is a relay, with normally closed contacts 37a and 37b.
39 is a relay, normally open contact 39
Activate a and 39b. Further, 26' is a timer relay which operates an instantaneous normally open contact 26'a and a time limited normally open contact 26'b.

Since this embodiment has the above-described configuration, before the combine harvester 1 performs the reaping operation, the sensor arm 6' is not in contact with the grain culm, the switch 7' of the direction sensor 5' is in the on state, and Each switch 19-22 is in the on state, so relay 32
and timer relays 33 and 35 are in the on state. In this state, the contact 32a is turned on, but the contact 33a is turned off and the relay 39 is not energized.
Contact 39b is turned off. When the combine 1 enters the row and the switch 7' is turned off, the contact 33a turns on instantaneously, energizing the relay 39, and at the same time, the contact 33b turns on and maintains itself. When turned on, the timer relay 26' is activated, and the contact 26'a is also turned on instantaneously for self-holding. At this time, the switch 7' is intermittently turned on and off, but the time-limiting contact 35a is not turned on during the normal period between grain culms, and therefore the contacts 37a and 37b are kept in the on state. As a result, the contacts 32a and 39b are turned on and the automatic direction control is activated, and when either the left or right switch 7' or 9' of the direction sensor 5' is turned on, for example the right turn command switch 9', the relay The contact 36a is turned on via the solenoid 36, and the right solenoid 16r is energized to correct the combine harvester 1 to the right. On the other hand, after a predetermined period of time has elapsed since the timer relay 26' self-holds, that is, after the grain culm is harvested and reaches the handling depth adjustment device 11 via the conveying device 10, the contact 26'b is turned on and the handling depth is adjusted. Control circuit C is activated. Then, when the combine 1 reaches the edge of the field, either one of the switches 20 to 22 is turned off by manual operation and the contact 32a is turned on via the relay 32, or the sensor arm 6' of the direction sensor 5' is turned off. does not come into contact with the grain culm for a predetermined period of time and the switch 7' is turned on continuously, the timer relay 35
The time limit contact 35a is turned on via the relay 37, and the contacts 37a and 37b are turned off. Then, the self-holding of relay 39 and timer relay 26' is released, contacts 39b and 26'b are turned off, and automatic direction control and automatic handling depth control are stopped at the same time.

As explained above, according to the present invention, the operating switch of the handling depth sensor 15 includes the direction sensor 5,
5' is used, there is no need to separately install a handling depth operating switch such as a grain culm sensor, and the number of sensors can be reduced. In addition, the direction sensor 5,
Since the handling depth control circuit C is activated after a predetermined delay time after the grain culm is detected by the grain culm, it is possible to prevent the grain from being handled too deeply at the start of work. Furthermore, once the direction sensors 5 and 5' sense the grain culm, they self-hold the self-holding circuit so that the handling depth control circuit C is activated, so it is difficult to determine what state the direction sensors are in. The cutting depth control circuit is never released, and the cutting depth is always controlled reliably during the mowing operation. In addition, the lever switch 20, the reaping clutch switch 21,
This can be done automatically by a manually operated switch such as the travel clutch switch 22 or the reaping section lift switch, or by a switch that is activated when the mowing is stopped, such as a time limit contact 35a that is activated when the switch 7' of the direction sensor 5' is turned on for a predetermined period of time. So,
The handling depth adjustment device 11 is stopped in that state, and does not start from the deep handling state in the next process.
The handling depth can be controlled smoothly.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view showing a combine to which the present invention can be applied, Fig. 2 is an electric circuit diagram showing an embodiment applied thereto, and Fig. 3 is a schematic plan view showing another combine to which the present invention can be applied. 4 are electrical circuit diagrams showing an embodiment applied thereto. 1... Combine harvester, 5... Direction sensor (double-sided sensor), 5'... Direction sensor (side sensor), 15... Handling depth sensor, 20, 21, 2
2, 35a... Switch activated when reaping is stopped, 26, 26a, 26', 26'a... Self-holding circuit, 26b, 26'b... Time limit timer, C...
... handling depth control circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a combine harvester having a direction sensor and a handling depth sensor, when the direction sensor detects a grain culm, after a predetermined delay by a timer, the handling depth control circuit based on the handling depth sensor An automatic control device for a combine harvester, which is provided with a self-holding circuit that activates the harvester, and is configured such that the self-holding circuit is released by a switch that is activated when reaping is stopped. (2) The automatic control device for a combine harvester according to claim 1, wherein the direction sensor is a double-sided sensor. (3) The automatic control device for a combine harvester according to claim 1, wherein the direction sensor is a side sensor.