JPH0724491B2 - Riding rice transplanter - Google Patents

Description

The present invention relates to a riding-type rice transplanter, which is adapted to maintain a planting device at a set height level with respect to a mud surface regardless of changes in the depth of a plowing machine. Is equipped with a grounding float that moves up and down according to the height variation of the planting device on the planting device that is connected to the traveling machine body through a lifting link. An elevating device that automatically elevates and lowers the planting device so that the height of the planting device against the mud surface becomes a set level, and the elevating device is switched to an operating state in which the planting device is elevated, with priority given to the ground float. The present invention relates to a riding type rice transplanter provided with operating means.

[Conventional technology]

In this type of riding type rice transplanter, when turning on a ridge (headland), the planting device is raised in order to prevent the mud surface from being disturbed by the ground contact float. When the device is raised to the upper limit of its rising stroke, it takes a long time to descend to the proper planting position after turning,
Work efficiency decreases.

Therefore, conventionally, when the planting device is raised by the operating means for turning, when the planting device is raised to a specific position in the middle of the elevating stroke, the automatic stop means for automatically stopping the raising is provided. .

[Problems to be solved by the invention]

However, when the conventional rice transplanter is used, the time required for lowering the planting device after turning can be shortened as compared with the case where the planting device is raised to the upper limit of the lifting stroke described above. There was a flaw.

That is, since the rice transplanter travels using the cultivator as a support surface, when the cultivator depth changes, the height of the mud surface at a specific position where the planting device is automatically stopped changes. During planting, the planting device automatically maintains the mud surface height at the set level, so changes in the height of the plowing device cause an excess or deficiency in the amount of rise of the planting device, resulting in a shallow plowing depth. If the amount of rise was excessive, the efficiency declined. If the amount of rise was insufficient and the amount of rise was insufficient, the mud surface was disturbed.

An object of the present invention is to reliably prevent the mud surface from being disturbed during turning, and to improve efficiency.

[Means for solving problems]

The riding type rice transplanter according to the present invention is provided with an ascending amount detection sensor for detecting an ascending amount from the set level of the planting device in the grounding float, and when the ascending amount detected by the ascending amount detection sensor is the set amount. The operation means has the following function and effect in that the stop means is provided in preference to the operation means to switch the elevating device to the elevating stop state.

[Action]

When the planting device is raised by a set amount from the set level by operating the operation tool, the raising operation means is switched to the raising / lowering stop state by the raising stop means based on the detected raising amount of the raising amount detection sensor, and the planting device is operated. Stops at the position where the set amount has risen from the set level.

In this way, the current setting level of the planting device, that is, the planting device is raised by a set amount with reference to the mud surface,
Since it is stopped, the planting device can be always raised from the mud surface to the position of the set height regardless of the depth of the tiller.

〔The invention's effect〕

As a result, the present invention, when turning, regardless of the platter depth
By raising the planting device with a minimum amount of rise, it is possible to reliably prevent the mud surface from being disturbed by the ground float, and moreover, the working efficiency can be improved by minimizing the time required for the planting device to descend after turning.

〔Example〕

 Next, examples of the present invention will be described.

As shown in FIG. 3, a prime mover (5) such as an engine is arranged in the front part of the machine body, and four quadruplets are provided on the rear side of the traveling machine body (2A) equipped with front and rear wheels (1) for traveling the tiller. The planting device (3) with the float (6) is connected via a link mechanism (15) to form a riding type rice transplanter.

The riding type rice transplanter automatically raises and lowers the planting device (3) so that the height of the planting device (3) against the mud surface becomes a set level in conjunction with the vertical swing of the float (6). Operating means (8) for switching the lifting device (7) and the planting device (3), that is, the operating state for lifting the traveling machine body (2A), in preference to the lifting device (7) and the float (6). A rise amount detection sensor (9) for detecting a rise amount from the set level of the planting device (3), and when the rise amount detected by the rise amount detection sensor (9) reaches a set amount, the operation is performed. Means (8)
And a stop means (10) for switching the lifting device (7) to a lifting stop state.

The lifting device (7) uses the hydraulic cylinder (7A) as an actuator to move the planting device (3) up and down with respect to the traveling machine body (2A). And a spoon type control valve (7B) for the hydraulic cylinder (7A).
As shown in FIG. 1 and FIG. 2, the float (6) is set to the set posture with the anti-planting device posture of the float (6) when the planting device (3) is at the set level. When the control valve (7B) is in the swing position, the control valve (7B) is in the neutral position where the elevator stops, and when the float (6) is in the swing position above the set posture, the control valve (7B) is in the raising position of the planting device. Position, the control valve (7B) is positioned at the planting device lowering position when the float (6) is swinging below the set posture, so that the wire (16) and the swinging link (8a ′) are positioned. Are linked through.

The operating means (8) operates the operating lever (11) with respect to the planting clutch that intermittently transmits power to the planting device (3), and operates the operating lever (11) to disengage the clutch to move the elevator. Control valve (7B) of device (7)
Is switched to the planting device rising position, and the operation lever (11) is actuated by the clutch to permit switching along with the vertical swing of the float (6) of the control valve (7B). It is configured like.

That is, as shown in FIGS. 1 and 2, the operating means (8) includes a swinging member (8A) swingable in a perspective manner with respect to the swinging link (8a ') of the lifting device (7). A first wire for pulling and swinging the swinging member (8A) from the proximity position (P _a ) to the separation position (P _b ) as the operation lever (11) swings to the clutch engagement position (P _N ). (8B) and the operating lever (1
When the first wire (8B) is loosened due to the swinging of 1) to the clutch disengagement position (P _F ), the spring (8C) that swings the swinging part (8A) back to the proximity position (P _a ). ) And the swinging member (8A) is in the proximity position (P _a ), the first
By swinging from the position (P ₁ ) to the second position (P ₂ ), the protrusion (8b) of the swing link (8a ′) is engaged and the float (6) is pulled upward from the set posture. Lifting tool (8D)
And with the swing of the operation lever (11) to the clutch disengagement position (P _F ), the pulling tool (8D) is pulled and swung from the first position (P ₁ ) to the second position (P ₂ ). It consists of 2 wires (8E).

Therefore, according to the above configuration, when the operating lever (11) is in the clutch engaging position (P _N), as shown in FIG. 1, positioned in the separation position (P _b) the swinging member (8A) is As a result, the pulling tool (8D) cannot be engaged with the swing link (8a '), and automatic lifting control is performed in which the control valve (7B) is controlled by the float (6). When the operating lever 11 is operated to disengage the clutch, the swinging member (8A) swings back to the proximity position (P _a ) as shown in FIG.
D) can be engaged with the swing link (8a ′), and at the same time, the pulling tool (8D) is engaged with the swing link (8a ′) from the first position (P ₁ ) to the second position. It swings to (P ₂ ) and the control valve (7B) switches to the position where the planting device (3) is raised.

The rise amount detection sensor (9) is a contact sensor that grounds on a mud surface with a set pressure and reversibly descends when the planting device (3) rises, and the planting device (3) reaches a set level. The swinging posture when positioned is used as a reference posture, and the amount of swinging downward from the reference posture is used to detect the amount of rise of the planting device (3) from the set level.

The stop means (10) is provided between the lift amount detection sensor (9) and the swing member (8A) of the operation means (8).
The rise amount detection sensor (9) is provided with a release wire (10a) that swings the swing member (8A) toward the separated position (P _b ) when the swing amount sensor 9 swings downward from the reference posture. When the swing member (8A) swings to the intermediate position (P _c ) in the swing range by swinging (9) downward by a set amount, to the projecting piece (8b) in the swing link (8a ′). The engagement margin of the pulling tool (8D) is configured to release the engagement of the swinging member (8D), and the swinging member (8A) is provided with the protrusion when the swinging member (8A) is at the intermediate position (P _c ). Engage with the control valve (7
B) is held at the neutral position, and an engaging piece (10b) for releasing the engagement with the projecting piece (8b) by swinging the swinging member (8A) to the separated position (P _b ) is connected. Is configured.

Therefore, with the above configuration, when the planting device (3) moves upward from the set level by the set amount and the ascending amount detection sensor (9) swings downward by the set amount, the swing member (8A) moves. The pulling tool (8D) is disengaged from the projecting piece (8b) by swinging to the intermediate position (P _c ), and the control valve (7B) is neutralized by the urging force of the float (6) to the ground side. At the same time as switching to the position, the engaging piece (10b) is held in its neutral position by the engagement with the protruding piece (8b), and the raising of the planting device (3) automatically stops. When the operating lever (11) is operated to the clutch engagement position ( _PN ), the engagement piece (10b) is disengaged from the projection piece (8b), and the lifting device (7) is automatically lifted. It will return.

(12) is a _second clutch disengagement position (P) beyond the clutch disengagement position (P _F ) of the operation lever (11) after the pulling tool (8D) swings to the second position (P ₂ ). ′ _F ) is a spring that allows swinging, and (13) is formed by swinging the operating lever (11) from the clutch engaged position (P _N ) to the second position clutch engaged position (P ′ _F ). A wire for operating the outer wire (10'a) of the release wire (10a) in the stopping means (10) to disconnect the connection between the release wire (10a) and the swing member (8A), and (14) is
It is a stopper that prevents the downward swinging of an amount that is slightly larger than the set amount of the lift amount detection sensor (9). That is, by operating the operated lever (11) to the second clutch disengagement position (P ′ _F ), the action of the stop means (10) is interrupted, and the planting device (3) is set above the set amount by the set amount. It is configured so that it can be raised. Of course, after raising the planting device (3) above the set amount, operating the operating lever (11) to the clutch disengaged position (P _F ), the raising amount inspection sensor (9) and the swing member (8A). ), The swinging member (8A) swings to the intermediate position (P _C ) and returns to the neutral position by the control valve (7B), and the planting device (3) is held stopped up and down. .

[Another embodiment]

 Another embodiment of the present invention will be described below.

As shown in FIG. 4, the control valve (7
B) is a switch (S) that detects the vertical movement of the float (6).
₁ ) and (S ₂ ), the electromagnetic 3-position switching valve is operated, and the operation lever (11) is operated to the clutch disengagement position (P _F ) and the second clutch disengagement position (P ′ _F ). The switches (S ₃ ) and (S ₄ ) detect the downward displacement of the sensor (9) and the switch (S ₅ ) detects the downward displacement of the sensor (9). The operation can be performed, and its operation will be described below.

In other words, when the operating lever (11) is switched to the clutch disengaged position (P _F ), the switch (S ₃ ) turns on and the relay (R ₁ ) operates, and the normally-closed relay contact (r ₁ ′) opens and lifts. The power to the control switches (S ₁ ) and (S ₂ ) is cut off, and the control valve (7B) is switched to the planting device rising position by closing the normally closed relay contact (r ₁ ).

When the float (6) rises to a set level on the mud surface by this ascending operation, the switch (S ₅ ) configured on the normally closed side is opened by the downward swing of the sensor (9), and the control valve (7B) is opened. Returns to neutral and further upward movement is stopped. Also, if the operating lever (11) is operated to the second clutch disengagement position (P ' _F ), the switch (P ₄ ) will turn ON.
Then, the relay (R ₂ ) is activated, the normally closed relay contact (r ₂ ′) is opened, the normally open relay contact (r ₂ ) is closed, and the control valve (7B) is switched to the switches (S ₁ ), ( It can be switched to the planting device raised position regardless of S ₂ ). In this case, since the switch (S ₅ ) linked to the sensor (9) has nothing to do with the valve operation, the ascending operation continues while the switch (S ₄ ) is ON. Then, the operating lever (1
By returning 1) to the clutch disengagement position (P _F ), the control valve (7B) will return to the neutral position as described above by the lifting check by the switch (S ₅ ). It can be lifted and fixed.

In the above-mentioned embodiment, as the rising amount detection sensor (9),
Although the contact type that contacts the mud surface is used, the ascending amount detection sensor (9) may be a non-contact type that does not contact the mud surface using ultrasonic waves or infrared light.

In the above embodiment, the operating means (8) is shown as the operating tool for the planted clutch also serving as the operating tool, but the operating means (8) is provided with a dedicated operating tool. It may be.

[Brief description of drawings]

1 to 4 show an embodiment of the riding type rice transplanter according to the present invention, FIGS. 1 and 2 are operation system diagrams showing the operation, and FIG. 3 is a side view of the riding type rice transplanter. FIG. 4 is a block diagram of another electrical type embodiment. (2A) …… Running vehicle, (3) …… Planting device, (6) ……
Grounding float, (7) ...... Lifting device, (8) ...... Operating means, (9) ...... Lifting amount detection sensor, (10) ...... Stopping means, (15) ...... Link mechanism.

Claims (1)

[Claims] 1. A planting device (3) connected to a traveling machine body (2A) via an elevating link (15), which moves up and down in accordance with a variation in height of the planting device (3) against the mud surface. Ground float (6)
A lifting device (7) for automatically raising and lowering the planting device (3) so that the height of the planting device (3) against the mud surface becomes a set level in conjunction with the vertical movement of the grounding float (6). )When,
A riding type rice transplanter provided with an operating means (8) for switching the lifting device (7) to the grounding float (6) in an operating state in which the planting device (3) is lifted. An ascending amount detection sensor (9) for detecting an ascending amount from the set level of the planting device (3) is provided in the grounding float (6), and the ascending amount detected by the ascending amount detection sensor (9) becomes the set amount. In this case, the riding type rice transplanter is provided with a stopping means (10) for switching the elevating device (7) to an elevating stop state in preference to the operating means (8).