JPH0646619A - Walking type working machine in paddy field - Google Patents

Abstract

PURPOSE:To reduce lever operation and to improve rotation in turning at the side of a levee. CONSTITUTION:A walking type rice transplanter in paddy field is equipped with a manipulating clutch 21 to be engaged and disengaged by a first handling means 14 provided with an operating handle 10 and a working clutch 27 to be engaged and disengaged by a second handling means 17 installed in the vicinity of the first handling means 14 through a checking means 42. The walking type rice transplanter in paddy field is equipped with a retaining means 47 for accumulating force of handling force of the working clutch 27 in the disengaging direction and restricting the checking means 42 and with a releasing means 48 for freeing the retaining means 47 by linking to cutting operation of the first handling means 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walk-behind paddy working machine, and is used as a rice transplanter, a direct flooding machine, and the like.

[0002]

2. Description of the Related Art In this type of walking paddy work machine,
Conventionally, when turning at a ridge, etc., it is necessary to disengage the work clutch such as the planting clutch and the steering clutch on the side of the turning direction. It was

[0003]

However, each time the driver enters a turning motion, the conventional dedicated operating means must be operated in several kinds within a short period of time, and the work load thereof is substantially reduced. Was a big one. Moreover, since the driver's one hand is separated from the steering wheel, the turning operation is difficult.

Therefore, according to the present invention, even when the operating means of the work clutch is operated in advance in the clutch disengagement direction when the vehicle is in the straight-ahead posture before the turning motion, the work clutch is not substantially acted in the clutch disengagement direction. A preload (accumulation force) was held and held, and then when the steering clutch was operated in the disengagement direction in order to turn at the ridge, the holding clutch was released to enable disengagement of the work clutch. With the goal.

[0005]

SUMMARY OF THE INVENTION The present invention is a steering handle.
A steering clutch 21 that is turned on and off by a first operating means 14 provided on the 10 and a second operating means 17 provided near the first operating means 14.
The walk-type paddy working machine 1 is provided with the working clutch 27 which is turned on and off via the restraining means 42 by the following technical means in order to achieve the above-mentioned object.

That is, according to the present invention, the working clutch 27 is used.
A holding means 47 for accumulating the turning direction operation force to restrain the restraining means 42 is provided, and a releasing means 48 for releasing the holding means 47 in association with the turning operation of the first operating means 14 is provided. It is characterized by that.

[0007]

According to the present invention, the operating handle is provided with the control handle 10.
While continuing to work 1 straight ahead, before reaching the ridge,
The second operating means 17 is operated in the clutch disengagement direction. But,
The restraining pin 41 of the restraining means 42 restrains the working clutch 27 from being substantially in the completely disengaged position while retaining the operating force in the disengaging direction of the working clutch 27 by the holding means 47.

Therefore, when the turning motion is performed at the edge,
When one of the first operating means 14, specifically, the steering clutch 21 on the turning direction side is operated in the clutch disengagement direction, the holding means 47 is released by the releasing means 48 in conjunction with this, and the work clutch is released.
Set 27 to the full clutch disengagement position and one steering clutch 21 to the disengagement position.

[0009]

EXAMPLE An example of the present invention will be described below as a walk-behind rice transplanter. However, the present invention is a flooded direct seeder other than the rice transplanter,
It can also be applied to walk-behind paddy field working machines such as fertilizer machines. Figure 4
In the above, a walk-behind paddy work machine (rice transplanter) 1 is equipped with an engine 2 and a mission case 3 at its front part and is configured to travel with a pair of left and right propulsion wheels 4.

At the rear of the walk-behind self-propelled aircraft 5, there is a planting case.
6, a seedling planting mechanism 7 and a seedling planting device 9 including a seedling stand 8 are connected, and a steering handle 10 is provided. At the bottom of Aircraft 5, there is a center float for leveling.
11 and a pair of left and right side floats 12 are provided, and left and right hand grips on the steering wheel 10
13 is provided with an operation lever that is a first operation means 14 for turning on and off the steering clutch, and the machine frame 15 of the seedling planting device 9 has a guide plate at the upper center position between the hand grips 13. An operation lever, which is the second operation means 17, is provided via 16 so that a planting clutch, which is a working clutch, can be turned on and off.

Referring to FIG. 3, the engine 2 is operatively connected to a main clutch 19 via a winding transmission member 18, and is steered to the output side of a gear transmission 20 capable of shifting between two forward gears and one reverse gear. A clutch 21 is provided, and a pair of left and right steering shafts 22 of the steering clutch 21 are interlocked with a pair of left and right propulsion wheels 4 via a winding transmission member 23. Further, the output of the stock adjustment means 24 is the transmission shaft.
25 and a planting drive shaft with a planting clutch (working clutch) 27 via a safety clutch 26 of jump clutch type
In addition to being linked to (working shaft) 28, it is linked to a screw shaft 30 for lateral feeding of the seedling stand via a winding transmission body 29.

Referring to FIG. 1, the steering clutch 21 is provided on the right and left sides of a drive gear 31 which is interlocked with the gear shifting section 20, and balls 32 are provided in holding holes formed in the left and right boss portions of the gear 31.
A ball groove in which the shifter 34 forms the ball 32 on the steering shaft 22 by the compression spring 33.
When the ball is pushed into the 22A, the clutch is engaged, and the clutch is disengaged, the ball 32 comes out of the ball groove 22A to cut off the power to the steering shaft 22, and the left and right shifters 34 swing around the fulcrum shaft 35. The shift lever 36 is slidable via a shift lever 36, and the shift lever 36 is linked to the left and right operation levers, which are the first operation means 14, by a release wire 37. In FIG. Is turned off, and the steering clutch 21 on the left side is turned on.

The working clutch 27 is a position at which the seedling planting mechanism 7 is moved largely upward from the paddy field when it is disengaged by an operation lever which is a second operation means 17 provided near the steering handle 10 at the rear of the machine body. Specifically, it has a function of stopping at a predetermined position slightly before the seedling take-out opening at the lower end of the seedling stand, and is configured as follows. As shown in FIGS. 1 and 2, the working clutch 27 is constantly engaged with a bevel gear 26A provided on the exit side of the safety clutch 26 and has a planted drive shaft 28.
It is composed of a drive rotor 38 with a bevel gear that is loosely fitted in a fixed position in the axial direction, and a driven rotor 39 that is slidably splined to the planted drive shaft 28, and is formed on the end face of the drive rotor 38. The entire claw 38A is configured to drive and stop the entire seedling planting device by engaging and disengaging with the claw 39A formed on the end surface of the driven rotor 39.

The driven rotating body 39 is urged to slide on the claw engaging side, that is, the clutch engaged side by a spring 40, and is engaged with a restraining means 42 having a restraining pin 41 that moves forward and backward from the planting case 6 in the radial direction. Due to the cam action due to the engagement, the spring 40 is forced to move backwards against the spring 40. Check pin
The restraint means 42 having 41 is connected to the second operating means 17 by the release wire 44 via the bracket 43, and is provided with the advancing biasing spring 45 of the restraint pin 41, and the restraint pin 41 has the cam surface 46A. A flange 46 is formed and a holding means 47 that is engageable with and disengageable from the flange 46 is provided.

The holding means 47 is attached to the interlocking member 49 of the releasing means 48,
An arm 47A that swings around the pin 50 as a fulcrum is provided.
Is engaged with the flange 46 to prevent the advance of the check pin 41 via the check arm 47B, and the retraction of the check pin 41 is made free by the cam surface 46A. A release lever 52 that swings around a fulcrum 51 is pivotally attached to the interlocking member 49 of the release means 48, and a release wire 55 that swings in the release direction 54 against the return spring 53 is attached to the release lever 52.
It is interlockingly connected to the pair of left and right first operating means 14 via.

A clutch disengaging cam that acts on the check pin 41 is formed as follows. As shown in FIGS. 2 (A) (B) (C), a check pin 41 is provided near the outer periphery of the driven rotor 39.
The parallel cam surface 56 that allows the engagement of the parallel cam surface 56 is formed along the circumferential direction over a predetermined phase range (θ ₁ ), and the spiral cam surface 57 having an upward slope is predetermined after the rotation of the parallel cam surface 56. of formed over the phase range (theta _2), and the peripheral wall 58 for abutment supporting the front end of the restraint pin 41 in the rotation axis side of these parallel cam surfaces 56 and the helical cam surfaces 57 are formed.

Further, at the rotational phase portion (a) corresponding to the rear end of the spiral cam surface 57, the peripheral wall surface 58 ends and the check pin
41 is allowed to advance toward the axis of rotation, and the driven rotary body 39 is driven by the advance of the check pin 41 at a location closer to the axis of rotation than the spiral cam surface 57 in this rotation phase portion (a). Push-in cam surface 59 with the rotation shaft center side set high to displace in the direction of moving away from 38 (clutch disengagement direction)
Are formed.

Further, behind the rotation phase portion (a), there is an upwardly inclined rotation suppressing cam surface following the spiral cam surface 57.
60 is formed over a certain small range (θ ₃ ). A parallel cam surface 61 along the circumferential direction is formed over the constant phase range (θ ₄ ) behind the rotation suppressing cam surface 60, and a contact surface 62 is formed upright at the end thereof.

Further, the tip engaging portion of the check pin 41 is formed in a tapered taper cone shape, and the cams 56, 57, 59, 60 and 61 are along the outer peripheral surface of the tip engaging portion. The inclined surfaces have the same inclination angle. Next, the operation will be described. When traveling the paddy work machine 1 to carry out planting work, the steering clutch 21 and the work clutch 27 are both in the clutch engaged position, and the second operating means 17 is engaged. When in the position, the release wire 44 is attached to the lever 17.
The restraint pin 41 linked via the spring is retracted outside the rotational trajectory of the driven rotor 39 against the advancing biasing spring 45, and the driven rotor 39 not engaged with the restraint pin 41 is restrained by the spring 40. The drive rotor 38 is biased by the drive rotor 38.

Therefore, when the second operating means 17 is operated to the clutch disengaged position in a straight-ahead posture before reaching the ridge, the release wire 44 is loosened and the check pin 41 is springed.
Even if an attempt is made to advance into the rotation locus of the driven rotating body 39 by the 45, this is restrained by the holding means 47, and the work clutch 27 is disengaged while holding the spring 45 in the preloaded (accumulated) state.
Instead, it is held in the "ON" state.

At the edge of the ridge, the release wire is operated by operating either the left or right first operating means 14, that is, the operating means 14 on the side of the turning direction, in order to turn the working machine 1.
When the steering clutch 21 is turned off via 37, the release lever 52 of the release means 48 is swung to the arrow 54 against the return spring 53 via the release wire 55 in synchronism with this operation. The interlocking member 49 is pulled in and the holding means 47 is released.

As a result, since the restraining pin 41 pre-loads the spring 45 with the clutch disengaged, the restraining pin 41 that has advanced to the rotation locus of the driven rotor 39 first moves on the parallel cam 56 in the phase range (θ ₁ ). It goes in and its tip is received by the peripheral wall surface 58. With the rotation of the driven rotor 39, the restraining pin 41 relatively enters the rotation phase (θ ₂ ) and engages with the upwardly inclined spiral cam surface 57. Helical cam surface 57 against stationary pin 41
The driven rotary body 39 is relatively slid in the direction away from the drive rotary body 38 as the rotary body rotates.

When the restraining pin 41 relatively reaches the rotational phase portion (a), the peripheral wall 58 disappears, and the restraining pin 41 is pushed toward the rotation axis by the spring 45, and driven by the pushing cam surface 59. The body 39 is further slid in the direction away from the driving rotary body 38, and the claws 38A and 39A are separated from each other. That is, a completely disengaged state is brought about. In the above embodiment, the second operating means 17 can be turned on and off by unstable switching using a spring.

Further, instead of the release wire 55, a link rod or the like can be adopted. Further, the holding means 47
And the releasing means 48 are the first operating means 14 and the second operating means 17.
An on / off detection switch may be provided, and the solenoid may be energized / demagnetized by a detection signal of the switch to operate the solenoid.

Further, the work clutch 27 functions to pay out and stop the seed paying roll when the working machine 1 is a direct submersion machine, and to drive the paying roll or shutter of fertilizer etc. when the working machine 1 is used. Functions as a stop.

[0026]

The present invention is as described above, and when the second operating means for operating the work clutch is operated to turn the clutch "disengaged" through the restraint means, the preparation posture for disengaging the clutch is set. Since the retaining means secures the holding clutch and the releasing mechanism interlocks with the first operating mechanism for turning the steering clutch "disengaged" when turning, the retaining mechanism releases the preparation posture of the retaining clutch to disengage the clutch. The second operation means is operated before reaching a point of time and the like, and when turning, the turning can be performed with the steering handle firmly held by both hands, and the turning can be performed easily and accurately.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

FIG. 2 shows details of a work clutch, (A) is a sectional view,
(B) is a perspective view and (C) is a plan view.

FIG. 3 is an overall configuration diagram schematically showing a power transmission system.

FIG. 4 is a side view showing a rice transplanter as an example of a walk-behind paddy working machine.

[Explanation of symbols]

 1 Pedestrian paddy work machine 10 Steering handle 14 First operation means 17 Second operation means 21 Steering clutch 27 Work clutch 42 Checking means 48 Release means

Claims (1)

[Claims] 1. A first operating means provided on a steering handle (10).
A steering clutch (21) which is turned on and off by (14) and a check means by a second operating means (17) provided in the vicinity of the first operating means (14).
A walk-behind paddy working machine (1) comprising a work clutch (27) which is turned on and off via (42), wherein the check force is accumulated by accumulating a cutting direction operation force of the work clutch (27). A holding means (47) for restraining the means (42) is provided, and a release means (48) for releasing the holding means (47) in association with the turning operation of the first operating means (14) is provided. A characteristic walking type paddy work machine.