JPS646721B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a direction control device for a reaper such as a combine harvester, particularly a small reaper that performs two-row cutting.

In general, there are two types of mowing operations: row mowing, which involves working along the rows, and so-called horizontal mowing, which involves working perpendicular to the rows. The installed left side sensor, that is, the row cutting sensor, allows the machine to follow the grain culm row on the left side of the cutting width, and during horizontal mowing work, the grain culm row is uneven and the direction cannot be controlled using the left sensor. It is necessary to control the direction using the right side sensor, that is, the side mowing sensor that follows along between the cut area and the uncut area.For this purpose, direction sensors are installed on both the left and right sides, and depending on the cutting conditions, they are installed on both sides. The sensor was manually switched by operating a switch. In other words, during row mowing, a sensor installed on the left divider detects the relative distance to the grain culm so that the left divider (on the uncut area side) runs in the middle of the row, and controls the direction of the reaper, allowing horizontal mowing. When reaping or sown crops, the direction of the reaping machine was controlled by manually switching the sensor installed on the right (already cut) divider to detect grain culms at the outermost edge of the uncut plot. Therefore, when turning the reaper, which requires many operations, it is necessary to manually operate the changeover switch each time the reaper changes from row mowing to horizontal mowing or from horizontal mowing to row mowing.
This caused considerable annoyance to the workers. Furthermore, if the switching operation is neglected or forgotten, the reaper will not be properly controlled with respect to the grain culm, resulting in uncut mowing or detachment of the row.

Furthermore, a direction control device has been proposed that automatically switches the sensors for row mowing and horizontal mowing according to the reaping operation by detecting the condition of grain culm rows peculiar to row mowing or horizontal mowing. However, the row mowing sensor is often activated even during horizontal mowing work, and both sensors are frequently switched, causing problems in the durability and reliability of the direction control device.

Therefore, the present invention automatically switches the row mowing and horizontal mowing sensors according to the mowing condition, making the operation easy and reliable, but also by interposing a timer in the sensor switching circuit. To provide a direction control device for a reaper, which is configured to maintain the operating state of a sensor for horizontal mowing for a certain period of time even if the same state as that during row mowing occurs during horizontal mowing work, thereby solving the above-mentioned problems. The purpose is to

Hereinafter, the present invention will be specifically explained based on an embodiment shown in the drawings.

As shown in Figs. 1 and 2, the reaper for two-row mowing has a left-hand divider 1, a center divider 2, a right-hand divider 3, a grain culm conveying device 6, etc. at the front of the machine. The driver's seat 7 is arranged on the right side thereof. As shown in an enlarged view in FIG. 2, the divider frame 1a supporting the left divider 1, that is, the divider on the uncut area side, is provided with a left sensor, that is, a row cutting sensor 10. It has a sensor bar 11 that protrudes to the right. Further, the divider frame 3a supporting the right divider 3, that is, the divider on the cut area side, is provided with a right side sensor, that is, a horizontal cutting sensor 12, and the sensor 12 has a sensor bar 13 that protrudes to the left side. There is. Left side sensor 10
, the sensor bar 11 is biased counterclockwise by a spring (not shown), and when the sensor bar 11 is in the rotation range A, only switch S _A in the sensor 10 (described later) is turned on, and the rotation is stopped. If it is in range C, sensor 1, which will also be described later,
If only switch S _B in 0 is turned on, and in the rotation range RO between them, both switches S _A ,
The configuration is such that both S and _B are in the off state. In addition, the right sensor 12 is connected to the sensor bar 1
3 is biased clockwise by a spring (not shown), and when the sensor bar 13 is in the rotation range A', the switch S _C in the sensor 12, which will be described later, is activated.
If only the switch S D in the sensor 12, which will also be described later, is turned on and within the rotation range C', only the switch S _D in the sensor 12, which will also be described later, is turned on, and the
, both switches S _C and S _D are turned off.

Next, the direction control circuit of this embodiment will be explained based on FIG. The circuit is the main switch
S _M are connected _in series, and further includes a circuit having a relay R B operated by a switch S _B built in the left sensor 10 and a relay R _C operated by a switch S _C built in the right sensor 12. The circuits having the same function are connected in parallel. In addition, a relay contact that is turned on when the relay R _B is energized
A sensor switching circuit _C is connected in parallel to operate a relay _RY in which S _RB1 , a relay contact S _RC1 which is turned off by energization of the relay RC, and a timer T ₁ are connected in series, and a sensor switching circuit C is connected in parallel to the relay _RY. When energized, the relay contact _SRY is switched from the state shown in the figure to the opposite state. In addition, the switching contact a of the relay contact S _RY , which is turned on when the relay R _Y is de-energized, and the switch S _A built in the left sensor 10
The delay timer T2 is connected in parallel so that the delay timer _T2 is activated by the ON operation of the switching contact B of the relay contact _SRY , or by the ON operation of the switching contact _b of the relay contact SRY and the relay contact _SRC2 , which is turned ON by the energization of the relay RC. . Furthermore, the continuity of relay contact S _RB2 , which is turned on by energization of contact a and relay R _B , or the continuity of switching contact b and switch S _D built in the right sensor 12, and the switching contact c or d of relay contact S _RY . The left drive section of the reaper is driven in a corresponding manner by the conduction between the timer contact S _T2 , which is energized by the delay timer _T2 , and the switching contact e or f of the relay contact _SRY , which are turned on by the delay timer T2. The solenoid S _lL that operates the clutch is connected in parallel with the solenoid S _lR that operates the clutch of the left drive section. In addition, the timer
_T1 is actuated as shown in FIG. 4, and at the same time an output is made, and the output continues for a certain period of time T so that it continues even after the input is cut off, and then it is cut off. As shown in the figure, the delay timer _T2 outputs an output with a delay of a certain time t after being activated, and the sensor bar 11,
A dead zone is formed so that the actuator 13 does not operate even if it reaches the rotational position A or A'. Furthermore, the relay contact _SRY operated by relay R _Y is a changeover switch having six changeover contacts a to f, and before operation, contacts a, c, and e are activated as shown in Fig. 3.
is closed and contacts b, d, and f are open, and after operation, contacts a, c, and e are open and contacts b, d, and f are closed.

Since the present invention has the above-described configuration, in the case of row cutting in which the reaping machine performs the reaping work along the rows as shown in FIGS. 6(a), (i), and (c), the reaping machine is The sensor bar 13 of the horizontal mowing sensor 12 on the right side in the direction of travel, that is, on the row mowing area side, is in the rotation range A' in FIG. Therefore, the switch S _C built into the horizontal mowing sensor 12 is turned on, and the relay R _C is energized, thereby opening the relay contact S _RC1 and starting the timer T ₁ .
does not operate, and relay R _Y is not energized. Therefore, relay contact S _RC2 is closed, but relay contact
Switching contact b of S _RY is opened, and the electric circuit of the reaper is connected to the row cutting sensor 10 on the uncut area side, that is, on the left side.
The row mowing operation is automatically set to control the direction of movement of the reaper using only the hand.

Under these circumstances, the row mowing work was carried out,
When the condition of the rows of grain culms reaches the state shown in (a) in Fig. 6, the sensor bar 11 of the sensor 10
Since it does not touch 5b, it will be in the rotation range A,
The built-in switch S _A of the sensor 10 is turned on.
As a result, the delay timer _T2 is activated, and the timer contact S _T2 , which forms a dead zone to prevent activation between grain culms, is turned on after a delay of t, and the solenoid S _lR that operates the right drive part of the reaper is activated. and the reaper turns to the right. Next, in state (a), the sensor bar 11 comes to the rotation range B, so the switches S _A and S _B built into the sensor 10 are both turned off, and in this state, the solenoid S that operates the right drive section Solenoid S _lL that operates _lR and left side drive section
Neither are operated in any way, and the reaper continues to move straight. Furthermore, in state (C), the sensor bar 11 enters the rotation range C, so only the switch S _B built in the sensor 10 is turned on.
Relay R _B is energized, relay contact S _RB2 is turned on, and the circuit including changeover contact a, relay contact S _RB2 , and changeover contact c becomes conductive, and solenoid S _lL is activated, so the reaper moves to the left. I will be heading towards In this way, the moving direction of the reaper body can be controlled to follow the lateral displacement of the grain culm in the row direction based on the detection by the row mowing sensor 10.

Next, the case of horizontal mowing in which the reaping machine is used to cut across the rows as shown in FIGS. 6(e), (o), and (f) will be described. In this case, for convenience of explanation, I will explain (o), (c), and (e) in this order.

First, when the reaper is in the (O) position relative to the row of grain culms, the sensor bar 1 of the left sensor 10
1 is rotated in the rotation range C, and the sensor bar 13 of the right side sensor, that is, the horizontal mowing sensor 12 is rotated in the rotation range B'. As a result, only switch S _B in sensor 10 and sensor 12
Since both switches S _C and S _D in the switch are turned off, relay R _B is energized and its relay contact S _RB1 is turned on, and relay contact S _RC1 is also in the on state, and the relay is activated via the timer T ₁ . R _Y is energized. As a result, relay contact S _RY of relay R _Y switches, switching contacts b, d, and f turn on, switching contacts a, c, and e turn off, and switch S _A
The circuit of relay contact S _RB2 , that is, the circuit of the left side row mowing sensor 10 is cut off, and the circuit of relay contact S _RC2 and switch S _D , that is, the right side horizontal mowing sensor 1 is cut off.
Although the circuit is switched to circuit No. 2, since relay contact S _RC2 and switch S _D are both off after switching contact b, current does not flow through both the left and right solenoids S _lL and S _lR , and therefore, the reaper is You will have to go straight. Next, when the state of (A) is reached, the sensor bar 11 is in the state of A, and the sensor bar 13 is also in the state of H'.
The switch S _A of the sensor 10 is turned off, the switch S _B is turned on, and the switch S _C of the sensor 12 is turned off and the switch S _D is turned on.
The circuit state is the same as the state (o) above except that switch S _D is turned on. Therefore, the circuit made up of switching contact b, switch S _D , and switching contact d becomes conductive, and solenoid S _lR is energized to cut the reaper. turns to the right. When state (e) is reached, this state (e) at first glance corresponds to state (i) or (c) in the case of row mowing work explained earlier, but normally (e) is the case. or () occurs within the time T determined by the timer _T1 after the state (or), so the relay R _Y is held in the energized state for a certain period of time T by the timer _T1 , and therefore the relay contact S _RY is switched and held. , the sensor bar 13 is in the rotation range A' and the switch S _C in the sensor 12 is activated.
is turned on, and relay contact S _RC1 is connected via relay R _C.
Even if T2 is in the OFF state, the delay timer _T2 is activated by switching contact b and relay contact S _RC2 , and after t time, the timer contact S _T2 is turned on, and the switching contact f connected in series with it is in the ON state. The solenoid S _1L is energized for a time T-t, causing the reaper to turn to the left. That is, even when the sensor bar 13 reaches the rotation range A' and the operation of the horizontal mowing sensor 12 is switched to the operation of the row mowing sensor 10, the direction is not changed immediately by the horizontal mowing sensor 12 for a certain period of time. controlled. Note that even if the condition (e) continues after time T set by timer _T1 due to a long bend in the row of uncut end grain culms, one end of the grain culm row will be removed from the row cutting sensor 10 on the left.
However, since the grain culms are not aligned during horizontal cutting, the rotation state of the sensor bar 11 of the sensor 10 on the left side is almost in the state shown in C.
The reaper is moved to the left under the same control as in the state (c) during row mowing described above, and immediately returns to the above state (o) or (c) and returns to horizontal mowing work.

As explained above, according to the present invention, the row cutting sensor 10 and the horizontal cutting sensor 12 are provided on the left and right sides of the reaper, respectively, and these sensors 10,
12, it is possible to switch the direction control circuit to correspond to row mowing or horizontal mowing by detecting the condition of the grain culm peculiar to row mowing or horizontal mowing, so that it is possible to switch from row mowing to horizontal mowing or vice versa. Conversely, when changing from horizontal mowing to row mowing, the driver does not need to perform any switching operations, which eliminates the complexity required for switching operations as in conventional methods, and eliminates the need for manual switching operations. As shown in the figure, it is possible to eliminate row disconnection and uncut mowing caused by forgetting to switch. Furthermore, when switching to horizontal cutting mode,
Since the switching time is maintained by the timer _T1 for a certain period of time, even if instantaneous row cutting occurs during horizontal cutting, the horizontal cutting sensor 12 continues its operation.
Frequent switching of the row mowing and horizontal mowing sensors 10 and 12 can be prevented. In addition, one row mowing sensor 10, 12 is provided on the unmown side and the already mowed side.
, and two switches are enough for each.
A simple device including a control device is sufficient. Further, if the row mowing sensor 10 and the horizontal mowing sensor 12 switch their operating modes together, and there is a risk of problems such as uncut mowing, the horizontal mowing sensor 12 is activated with priority immediately. , it is possible to respond flexibly to the situation and prevent uncut leaves.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view showing the front part of the reaper according to the present invention, Fig. 2 is a schematic enlarged plan view showing the sensor portion thereof, Fig. 3 is an electric circuit diagram according to the invention, and Fig. 4 is a time limit timer T. 5 is a time chart of the delay timer T ₂ , and FIG _. 6 is a diagram showing the relationship between the sensor part of the reaper and the grain culm to explain the operation of the present invention. . 1... Unmown section side divider, 3... Already cut section side divider, 10... Row mowing sensor,
12...Sensor for horizontal mowing, S _A ...Turning command switch for the uncut area side of the row mowing sensor, S _B ...Turning command switch for the already cut area side of the row mowing sensor,
S _C ...Turning command switch on the side of the mowed area of the horizontal mowing sensor, S _D ...Turning command switch on the uncut area side of the sensor for horizontal mowing, C...Sensor switching circuit,
T ₁ ...Timed timer.

Claims (1)

[Claims] 1 One row mowing sensor that detects the position of the grain culm in an area divided into three is installed in the introduction path of the planted grain culm on the uncut side, and a sensor is installed in the introduction path of the planted grain culm on the already cut side. In a reaper equipped with one horizontal mowing sensor that detects the position of the grain culm in an area divided into three parts, the row mowing sensor's mown side, straight forward, and uncut side turning commands cause the crop to move in the corresponding direction. The direction of the reaper is controlled, and when the row mowing sensor commands the non-mow side direction, the horizontal mowing sensor is switched to the operating state by canceling the non-mow side direction command of the horizontal mowing sensor, and the horizontal mowing sensor is switched to the operating state. The direction of the reaping machine is controlled in the corresponding directions by the mowing side, straight forward, and uncut side turning commands of the horizontal mowing sensor. Furthermore, a timer is interposed in the switching circuit of the sensor, and the horizontal mowing sensor A direction control device for a reaper configured to maintain a horizontal mowing sensor in an operating state for a certain period of time even when a non-mow side turning command is issued.