JPH02283207A - Working machine of walking type for paddy field - Google Patents

Abstract

PURPOSE:To improve operating characteristics by automatically stopping action of rolling-control device according to detected action of detecting mechanism detecting rising operation to grip part of hand side in operating handle. CONSTITUTION:An operating handle 13 is risen and a detecting mechanism 28 detecting rising operation to a grip part 13B of hand side detects shaking displacement, etc., of the grip part of hand side to a base end part, then a stopping mechanism 27 automatically stops action of a rolling-control device A. Thus, the subject machine is able to be stably revolved in revolution at a side of ridge by stopping of the rolling-control device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a walk-behind paddy field work machine that is provided with a rolling control device that maintains the rolling attitude of the ground work device with respect to the field surface at a predetermined attitude.

[Conventional technology]

Conventionally, the rolling control device has not been provided with a mechanism for specifically stopping its operation.

[Problem to be solved by the invention]

Therefore, since the rolling control device can operate even when turning around the edge of a ridge, on the other hand, at the edge of a ridge where the degree of roughness of the field is large, the sensor senses too much unevenness on the field surface, causing the control to operate frequently. This sometimes caused hunting. This made turning maneuvers even more difficult.

In addition, in order to eliminate this inconvenience, it is possible to provide a mechanism to stop the rolling control and operate the mechanism with a hand control lever, but in order to operate the hand control lever, it is necessary to use the hand control handle. There was also the problem of reduced operability, such as the need to move the machine away from the user.

The purpose of the present invention is to improve operability by rationally starting and stopping a rolling control device, and
The object of the present invention is to provide a device that can improve the operability of an operating mechanism that controls activation and termination of the rolling control device.

[Means to solve the problem]

The characteristic configuration according to the present invention includes a detection mechanism that detects a lifting operation on the hand grip portion of the operating handle, and a mechanism that automatically stops the operation of the rolling control device based on the detection operation of the detection mechanism. Its functions and effects are as follows.

[For production]

That is, when the operating handle is lifted, the detection mechanism senses, for example, a rocking displacement of the proximal end of the hand grip, and the rolling control device stops. Therefore, when turning at the edge of a ridge, the rolling control device is stopped, and the turning operation can be performed more stably than when the control is activated.

〔Effect of the invention〕

In this way, with a walk-behind paddy field work machine, you can use the customary operation method of lifting the control handle to bring the machine into a forward-downward position when turning on a ridge, and you can also stop the rolling control device without changing the control handle. This has the advantage that it is possible to improve the operability of the stopping operation of the rolling control device, and also to be able to perform ridge turning in a stable state.

Further, since the rolling control device can be stopped by the stopping mechanism, the stability of the aircraft body can be ensured even when moving over a ridge.

〔Example〕

As shown in Figure 9, a walking rice transplanter, which is an example of a walking rice paddy work machine, has an engine (1) and a transmission case (2) at the front, extending from the rear end of the mission case (2). A transmission case (3) that also serves as the machine frame, a seedling planting device (7) consisting of a planting case (4) at the rear end, a seedling stand (5), and a seedling planting mechanism (6); ) on the rear side of the control handle (13), the mission case (
2) left and right wheels (8) that can freely swing up and down around the horizontal axis;
(8), and a grounding float (9) is disposed between the left and right wheels (8), respectively.

The grounding float (9) is pivotally supported on the body (V) so as to be swingable up and down around the transverse axis (Xl) of the rear fulcrum, and to roll freely around the longitudinal axis (Yl) of the body.

A bracket (10) is installed upright in front of the ground float (9), and a swing drive arm (16) that drives the rolling control valve (15) spool is provided, and the swing drive arm is connected to the bracket (10). (16), the arm (11) that swings around the front-rear axis, and the linking rod (I2).
) to transmit the rolling operation of the ground float (9) to the rolling control valve (15).

Next, the rolling drive mechanism on the traveling body side will be explained.

As shown in Fig. 9, the wheel cases (18), (18), in which the left and right wheels (8), (8) are pivotally supported, are pivotably supported on the transmission case (2) so as to be able to swing vertically. Case (18), (18) Drive arm (19), (1,9) erected at the base end, and lifting cylinder (20)
The balance arm (
22 with the left and right connecting rods (23a) and (23b).
) so that the left and right wheels (8), (8) can be raised and lowered at the same time by the telescopic drive of the lifting cylinder (20), and a part of one linking rod (23a) is a hydraulic type. It is composed of a rolling cylinder (24), and the left and right wheels (
8), the relative height of (8) can be changed. The rolling cylinder (24) is configured to be controlled by the rolling control valve (15), and the rolling cylinder (24) and rolling control valve (15) are referred to as a rolling control device (A).

Next, the structure of the control handle (I3) will be explained.

As shown in FIGS. 2 and 3, the control handle (1
3) is the base end (13A) fixed to the planting case (4)
It consists of a proximal grip part (13B) which is attached to the upper end of the proximal end part (13A) so as to be able to swing up and down, and an arm (14) that swings together with this proximal grip part (13B) and the base. The hand grip portion (13B) is located between the end portion (13A) and the end portion (13A).
A spring (25) is installed to bias the spring downward.

In FIG. 3, (26) is an abutment member that comes into contact with the arm (14) to set the upward limit of the hand grip (13B).

Mechanism (27) for stopping the rolling control device (A)
) will be explained.

As shown in FIG. 1, the arm (14) of the hand grip (13B) and one end of a relay swinging arm (29) are linked via the first release wire (28), and this relay swinging A shift member (41) that is driven and slid by the arm (29) is provided to cause the shift member (41) to roll by acting on the second swing drive arm (32) that drives the rolling control valve (15). Control valve (1
A neutral drive arm (30) that switches the neutral drive arm (30) to the neutral state is swingably supported.

A cam surface (30) is provided at one end of the neutral drive arm (30) to neutrally bias the second swing drive arm (32).
A) and a second release wire (31) connected to the piston rod (24A) of the rolling cylinder (24) at the other end.
) to the rolling cylinder (2
4) constitutes a feedback system. Therefore, this neutral drive arm (30) is in the neutral position shown in the figure when the rolling cylinder (24) is in the neutral state, and in the rolling state it is in either one of the positions as shown in FIG. 5 (A) and FIG. 6 (A). It is in a state of oscillation.

The first release wire (28) and the arm (14)
This is referred to as a detection mechanism that detects a lifting operation on the hand grip portion (13B).

With the above configuration, the operation of the stopping mechanism (27) will be explained as follows: (1) As shown in FIG.
3B) is not lifted, the relay swing arm (29)
and the shift member (41) is in the position shown. Therefore, since the neutral drive arm (30) is spaced apart from the second swing drive arm (32), it does not act on the swing drive arm (16). Therefore, the rolling control valve (15) is connected to the ground float (9).
It is controlled only by the rolling operation of.

■ Next, as shown in FIG. 4(b), when the hand grip portion (13B) is lifted, the shift member (41) slides and the cam surface at the tip of the neutral drive arm (30) is moved. (3
0A) acts on the second swing drive arm (32). In this case, due to the combination of the rolling control valve (15) being in the neutral position and an operating position other than the neutral position, and the neutral drive arm (30) being being in the neutral position and a position other than the neutral position, The following stopping mechanisms (27
) There is a difference in the operation.

(a) That is, as shown in FIG. 4(b), when the neutral drive arm (30) and the second swing drive arm (32) are in a neutral state, that state is maintained. Therefore, the rolling control is stopped, and the left and right traveling wheels (8), (8) are also in a parallel state.

(b) Also, as shown in Figure 5 (a), left and right running wheels (8)
, (8) have different heights and the neutral drive arm 1, (30
) is in the swing state and the swing drive arm (32) is in the neutral state, the neutral drive arm (30) acts on the second swing drive arm (32), thereby causing the rolling control valve (15 ) to a neutral state, and pressurized oil is supplied in a direction to align the heights of the left and right running wheels (8), (8) parallel to each other. Then, this time, the neutral drive arm (3
0) is switched to the neutral position, the second swing drive arm (32) is switched to the neutral position, and the left and right running wheels (8) and (8/ are in a parallel state), as shown in Fig. 5 (c). The rolling control stops. Also, as shown in Figure 6 (a),
In this manner, when the neutral drive arm (30) is inclined to the right, the cam surface (30A) causes the second swing drive arm (32) to be tilted further to the right, for example. Even if the left and right running wheels (8) are tilted to the left beyond the neutral state, the left and right running wheels (8) are switched to a parallel state, as shown in FIG. ) and (8) become parallel, the neutral drive arm (30)
becomes the neutral state, and switches the second swing drive arm (32) to the neutral state.

As described above, in any case, by lifting the hand side grip part (13B), the wheels (8), (8) can be returned to parallel, and the rolling control can be stopped.

[Second Example] Another form of the control handle (13) will be explained. As shown in Fig. 7, the left and right hand side grips (13B), (13B)
are pivoted to be able to swing up and down independently relative to the base end (13A), and the respective grip portions (13B), (1, 3
B) is provided with a grip lever (41) for the steering clutch (33), (33). On the other hand, the left and right steering clutches (33), (33) and the left and right grips (13B), (
The left hand grip portion (13B) and the right steering clutch (33) are linked by a third release wire (34) so that the left and right hand grip portions (13B) are linked in a left-right shifted state. A left and right drive arm (35) swings integrally with the hand grip portion (13B).
) is fixedly installed, and this left and right drive arm (35).

The rocking motion of (35) is transmitted to the relay rocking arm (29) (, the relay rocking arm (29) and the drive arm (
35), the fourth release wire (42
) and a passive arm (36).

Therefore, when turning on the ridge, one hand side grip part (13B)
When turning while lifting the vehicle and tilting the traveling body slightly to the inside of the turn, the steering clutch (33) on the inside of the turn can be disengaged and the rolling control can be stopped.

In addition, (37) in Fig. 1 and Fig. 7 is the above-mentioned grounding flow)-
This is an elevation control device according to (9). The grounding float (9) is held down in the grounding direction by linking a biasing spring (39) that sets the control sensitivity to the arm (14) of the control handle via the fifth release wire (40). , lift the hand side grip part (13B) to stop the rolling control, weaken the force of the biasing spring (39) and increase the control sensitivity, and control the left and right wheels (8).
, (8) may be slightly lowered to raise the traveling body (V) to reduce the grounding resistance of the grounding float (9) and the like.

[Another example]

(2) The detection mechanism may be one that can extract the detection results as an electric signal from a strain gauge or the like glued to the hand grip (13B). When using this strain gauge as a detection mechanism, the proximal grip portion (13B) and the base end portion (13A) may not be displaced relative to each other.

(2) A sliding structure may be used to displace the proximal grip portion (13B) relative to the base end portion (13A).

(2) Alternatively, the entire control handle (13) may be swung relative to the fuselage frame.

■ The example above is a field F11 equipped with fertilization equipment, etc.
It may also be applied to machines, etc.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the walking type paddy field work machine according to the present invention,
Fig. 1 is an overall control configuration diagram, Fig. 2 is a side view showing the hand grip, Fig. 3 is a detailed view of the main parts of Fig. 2, Fig. 4 (4),
([+) is an operation diagram showing the case where the left and right wheels are parallel and the grounding float is parallel, and the grip on the hand side is lifted. Operation diagram showing the case where the floats are parallel, Figure 6 (a), (σ)
, (C) is an operation diagram showing the case where the left and right wheels are tilted and the ground float is also tilted. Figure 7 is an overall control configuration diagram corresponding to a control handle with a different structure. The eighth factor is the operation diagram of the control handle in Figure 7. Enlarged view of main parts, No. 9
The figure is an overall side view. (7)...Ground work equipment, (13)...
・Control handle, (13B)...Grip part, (2
7)... Mechanism for stopping (28)...
- Detection mechanism, (A)...Rolling control device.

Claims (1)

[Claims] A walk-behind paddy field work machine is equipped with a rolling control device (A) that maintains the rolling attitude of the ground work device (7) with respect to the field surface at a predetermined attitude, and the hand grip part (13B) of the control handle (13) A detection mechanism (28) is provided for detecting a lifting operation on the
8) based on the detection operation of the rolling control device (A
) A walking paddy field work machine having a mechanism (27) for automatically stopping the operation of the rice field machine.