JPS5922B2 - Automatic gearbox for automatic reaper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides automatic follow-up reaping forward travel along a row of planted stem culms, and then reverse movement of the forward/reverse switching device based on detection of the end of an adjacent uncut row of planted stem culms. to automatically return backward along the stump row or the uncut adjacent planted stem culm row, and switch the forward/reverse switching device to forward movement based on the detection of the end of the adjacent planted stem culm row in the backward direction; This invention relates to an automatic reaping machine configured to temporarily provide circularity toward the starting end of adjacent planted stem culm rows at the initial stage of forward movement, thereby enabling automatic reaping and harvesting work of an unmanned forward/backward switching type.

In such an automatic reaping machine, forward switching or backward switching control is performed by returning the stem culm row end detection sensor to the neutral position, but it is difficult to determine which switching should be performed based only on the detection result of this sensor. This method requires a mechanism to determine the direction in which the sensor swings, making it complicated.

The present invention is designed to be able to relatively easily determine whether forward or forward switching is required by combining a mechanism for detecting the position of the lever switching device with the sensor attitude detection mechanism.

Embodiments of the present invention will be described in detail below based on illustrative drawings.

Figures 1 and 2 show a reaping and tying machine (as an example of a reaping machine).
A reaping section 6 consisting of a lifting device 1, a pulling frame 2, a reaping device 3, a horizontal conveyance device 4, a binding device 5, etc. is provided at the front of the machine. A pair of left and right running wheels 7a, 7 are provided behind the reaping section 6.
Mission case 8 equipped with b, engine 9, 0 control handle 10, etc. are installed.

A stem culm abutting guide 11 for preventing the planted stem culm to be reaped from escaping to the right outside is extended in front of the pulling device 1, and a lifting device 1 is provided on the inside of the lifting frame 2. A guide 12 is provided between the guide frame 2 and the lifting frame 2 for slidingly supporting the base of the planted stem culm.

Further, the engine frame 13 is provided with a pair of bridge-shaped reverse guides 14 that contact the stump from the left and right sides, and a sensor 15 that comes into contact when the aircraft gets too close to the unmerged stem culm side.

Moreover, between the pulling device 1 and the pulling frame 2, there is a device for detecting the presence or absence of a stem culm, which is pressed and swung backwards when it comes into contact with a planted culm, and returns to swing forward when the contact is released. Based on the sensor 16 detecting the presence of a stem culm, power is transmitted to the reaping section 6, and the sensor 1
It is mechanically connected to a reaping section clutch (not shown) so that power transmission to the reaping section 6 is cut off based on the stem culm absence detection operation of step 6.

Further, among the running wheels 7a and 7b, only the left wheel 7a is connected to the axle 17 with a fixed angle of relative rotation flexibility, and the side wheels 7a and 7b can be shifted to three forward speeds and one reverse speed by a speed change operation lever 18. It is composed of

The speed change operating lever 18 is configured to be automatically switched between forward speed, which is the reaping speed, and reverse speed by a forward/reverse switching device 19 provided in the transmission case 8 under control as described below.

That is, in the forward/reverse switching device 19, as shown in FIG. The lever switching tool 20 is an electric motor 21 capable of forward and reverse rotation.
and a sensor 23 and a planted stem culm, which are disposed so as to be movable in both the position switching directions via a deceleration mechanism 22, and the electric motor 21 is pivotally connected to the raising frame 2 so as to be swingable back and forth. The drive is configured to be controlled in forward and reverse directions based on changes in the contact state.

The sensor 23 is energized to a neutral posture n protruding laterally and laterally, and changes from a backward leaning posture r to a neutral posture n;
The change from the forward leaning posture f to the neutral posture n is electrically detected and determined by a posture detection mechanism 24 provided at the base of the sensor.

Further, a first electrical contact group 25 made of a printed conductive plate is attached to the base of the lever switching device 20, and the first electrical contact group 25 is attached to the case of the forward/reverse switching device 19.
A second electrical contact group 26 consisting of a large number of brushes that selectively contacts the contact point 25, 26 is fixed, and a mechanism 27 is configured to detect the position of the lever switching device 20 by changing the contact state of both contact groups 25 and 26. The motor 21 is also controlled based on the detection result.

FIG. 5 shows a control circuit for the electric motor 21, and the attitude detection mechanism 24 of the sensor 23 includes a first electrical contact group 2 fixedly installed on the aircraft body in radial parallel to the sensor fulcrum.
8... and a second electrical contact group 30 printed on the fan-shaped board 29 fixed to the base of the sensor 23.
It is configured to detect the sensor posture based on changes in contact with...

In the figure, 31 and 32 are capacitors for motor drive circuit selection, 33 and 34 are relays for motor drive circuit switching,
35 and 36 are a group of relay contacts, 37 is an ignition circuit of the mounted engine 9, 38 is a relay for shorting and grounding the ignition circuit 3T, 39 is a group of relay contacts, and a delay circuit 40 is connected to this relay 38. ing.

Further, a switch 41 that is connected to the sensor 15 at the rear of the fuselage is connected to the delay circuit 40.

Next, an outline of the automatic reaping operation will be sequentially explained.

(A) Forward travel for reaping (see Figure 4A) When the gear change operation lever 18 is set to the second forward speed position F2 and the machine is directed toward the outermost planted stem culm row A, the lower surface of the reaping section 6 slides onto the field. In the state where they are in contact with each other, the machine body pulls up the stem culm row A by the guiding action of the left and right guides 11 and 12, and the device 1 and the lifting frame 2
The vehicle moves forward following the vehicle while being guided along the introduction route between the vehicle and the vehicle.

Then, the reaping section 6 is driven by the operation of the stem diameter presence/absence detection sensor 16, and automatic reaping travel is performed.

Also, at this time, the sensor 23 assumes a backward tilted posture r due to contact with the adjacent planted stem culm row B.

(b) Reverse return travel (see Figure 4) When the cutting of the stem culm row A is completed and the machine moves a suitable distance forward from the end of the adjacent planted stem culm row B, the sensor 2
3 comes off the final fractional stock b' and swings back to the neutral position n,
When this operation is detected, the motor 21 is driven in the reverse direction, and the shift operation lever 18 is accordingly switched from the second forward speed position F2 to the reverse position R.

When switched to reverse as described above, the reverse guide 14
Under the guidance of , the aircraft automatically returns to reverse along stump row C.

Note that during this backward movement, the sensor 16 detects the absence of a stem culm, so the drive of the reaping part 6 is cut off, and the sensor 23 assumes a forward tilted posture f when it comes into contact with the stem culm row B.

(c) Forward switching operation (see Figure 1) When the machine moves backward and crosses the end (starting end) of the stem culm row B, the sensor 23 comes off the end of the stem and returns to the neutral attitude n, and this operation is detected. and the motor 21 is driven in the normal rotation,
Along with this, the shift operation lever 18 is switched from the reverse position R to the second forward speed position F2.

2) Forward steering operation (see Figure 1) When the switch is made from reverse to forward, the aircraft tilts backwards as shown by the imaginary line in Figure 1 due to the reaction of the reverse direction of travel, and the left wheel 7a aligns with the axle 17. In order to accommodate a certain angle, the aircraft stops for a certain period of time, and only the right wheel 7b is driven forward, and the aircraft rotates to the left and moves forward.

Then, the guide 11 grasps the stem culm row B from the right outside, pulls up the stem culm row B, and introduces it between the device 1 and the lifting frame 2.

The one-cycle operations (a) to (b) described above are repeated in sequence to perform unmanned reaping work.

Next, control of the electric motor 21 in the forward/reverse switching device 19 will be sequentially explained.

(I) Forward travel for reaping (see Figure 6) During forward reaping, the lever switching tool 20 is in the neutral position and the sensor 23 is in the backward tilted position r, so the first capacitor 31 is charged. .

(II) Forward end detection (see Figure 7) sensor 23
In order to return to the neutral attitude n, the first capacitor 31
is discharged, the first relay 33 operates and its contact group 35 is switched, and the motor 21 is driven to rotate in a predetermined direction (referred to as reverse rotation), so that the lever switching device 20 moves the speed change operating lever 18 to the reverse side. Shift in direction X.

(@ Reverse switching (see Figure 8)) Before the first capacitor 31 completes discharging, the contact state of the position detection mechanism 27 of the lever switching tool 20 is switched to a circuit state that maintains the first relay 33 energized. Therefore, the motor 21 continues the reverse rotation.

Motor Neutral Return (See Figures 9 and 10) When the lever switching device 20 moves the lever 18 to the reverse position R, the contact state of the position detection mechanism 27 cuts off the first relay 33. The second relay 34 is switched to the energized state, and the forward rotation drive circuit of the motor 21 is established by switching the relay contact groups 35 and 36, and the lever switching device 20 moves in the opposite direction Y.

(See Fig. 9) Then, when the lever switching tool 20 advances a little, the position detection mechanism 27 switches the contact state as shown in Fig. 10, the second relay 34 continues to operate in a different energized circuit, and the lever The switching tool 20 continues to move in the Y direction, and when the lever switching tool 20 returns to the neutral position, the motor drive circuit is cut off.

(V) Reverse travel (see Figure 11) During reverse travel, as mentioned above, the lever switching device 20 has returned to the neutral position and the sensor 23 is in the forward tilted position f, so the second capacitor 32 is charged.

(■ Reverse end detection (see Figure 12)) In order for the sensor 23 to return from the forward tilted position f to the neutral position n, the second capacitor 32 is discharged, and the second relay 34
is activated, the motor 21 is driven to rotate forward, the forward switching operation of the lever 18 is started, and the same motor control (
The rotation direction is the opposite direction to that described above) is performed sequentially (I
).

The motor control described above is repeated in sequence to perform unmanned forward and forward switching.

Note that during forward and reverse mowing, the lever switching device 20 is in the neutral position, as shown in Figure 6 p and Figure 11, so in an emergency, the gear shift operating lever 18 must be manually operated arbitrarily. It is now possible.

Furthermore, the circuit configuration described above makes it possible to prevent the hair from straying to the mowed side and the uncut side.

In other words, the sensor 23 detects the end of the stem culm row and the neutral posture n
If a certain period of time has passed while the machine has returned to the original position, for example, if the forward or reverse mode is switched and the aircraft veers off to the already-cut side, the capacitor 42 of the delay circuit 40 is charged and the transistor 43 is increased, the relay 38 is energized, the contact group 39 is switched, the ignition circuit 37 is shorted to ground, and the engine 9 is stopped.

Additionally, if the machine goes far into the uncut side while going backwards, the sensor 15 touches the stem culm and the switch 41 is switched, which immediately energizes the relay 38 and short-circuits the ignition circuit 37 to ground, causing the machine to Stop.

As described in detail in the above embodiments, the present invention enables the electric motor for changing the speed change operation lever to be operated based on the detection results from the sensor for detecting the ends of stem culms and the detection results from the position detection mechanism of the lever switching device. Since the forward/reverse control is based on the
In other words, since the lever switching direction is determined based on two detection elements, it is easier to set the determination conditions, compared to the case where the lever switching direction is determined only based on the detection result from the row end detection sensor. The Tanabata control circuit has also become easier to configure.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the present invention, and FIG. 1 is an overall side view of the binder, FIG. 2 is an overall plan view, FIG. 3 is a perspective view of the forward/reverse switching device, and FIG. 4 is an automatic reaping operation. Fig. 5 is a motor control circuit diagram, Fig. 6 is a schematic plan view showing the sequential operation of
12A and 12B are motor control circuits showing the sequential operation of motor control, respectively, and FIGS. 6 to 12 are schematic diagrams showing the switching state of the speed change operation lever in each control state. 18... Speed change operation lever, 19... Forward/forward switching device, 20... Lever switching tool, 2
1... Electric motor, 25... First electrical contact group, 26... Second electrical contact group, 27...
... Position detection mechanism, A ... Planted stem culm row, B.
... Uncut adjacent planted stem culm row, C... Stump row.

Claims (1)

[Claims] 1 After automatic follow-up reaping forward movement along the planted stem culm row A, the forward/reverse switching device 19 is switched to reverse based on the detection of the end of the uncut adjacent planted stem culm row B, and the stump row C Alternatively, it automatically returns backward along the uncut adjacent planted stem culm row B, and switches the forward/reverse switching device 19 to forward movement based on the detection of the end in the backward direction of the adjacent planted stem culm row B, and temporarily at the beginning of forward movement. In an automatic reaping machine configured to provide circular movement toward the starting end of an adjacent planted stem culm row B, the forward/reverse switching device 19 is moved by an electric motor 21 that can rotate the speed change operation lever 18 in forward and reverse directions. The lever switching tool 20 is configured to perform the switching operation, and the lever switching tool 20 or
A first electrical contact group 25 is integrally connected to this.
In addition, a second electrical contact group 26 connected to the electric motor control circuit is connected to the first electrical contact group 25 on the fixed member side of the forward/reverse switching device 19. The operating position of the lever switching device 20 is set to the first position.
, second electrical contact group 25..., 26...
A position detection mechanism 27 is configured to detect a change in the contact state of the stem culm row end, and the electric motor 21 is controlled based on the attitude detection result of the sensor 23 for detecting the end of the stem culm row and the position detection result of the lever switching tool 20. An automatic transmission device for an automatic reaper characterized by: