JPH0662626A - Rice transplanter - Google Patents

Abstract

PURPOSE:To provide a rice transplanter capable of setting the efficient timing to start the planting work according to the operation mode favorite with the operator. CONSTITUTION:A seedling transplanting apparatus is connected to a mobile machine body in a state freely liftable with a lift cylinder 3. A manual lifting lever 21 for the seedling transplanting apparatus is provided to enable the free switching of the apparatus among a planting position, a lowered position, a neutral position and a forced lifting position. The seedling transplantation apparatus is made to be freely switchable with a lifting switch SW1 between a preferentially lifting state and a state to lower to the ground. Power is transmitted from the mobile machine body to the seedling transplanting apparatus through a planting clutch 12 driven by an electric motor M. The electric motor M is automatically switched from the clutch-disconnected state to the state of coupled clutch simultaneous with the operation of the manual lift lever 21 to the planting position. When the lift operation switch SW1 is operated to lower the seedling transplanting apparatus, the electric motor M is automatically controlled from the clutch-disconnected state to the state of coupled clutch after the lapse of a prescribed period from the time of the operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention connects a seedling planting device to a traveling machine body so as to be able to move up and down by a drive mechanism, and to switch between a planting position, a descending position, a neutral position and a forced rising position. The artificial raising / lowering lever of the seedling planting device is provided, and the raising / lowering operation switch that can be switched between the state where the seedling planting device is preferentially raised and the state where the seedling planting is lowered to the ground are provided. The present invention relates to a rice transplanter configured to transmit power from a traveling machine body to the seedling planting device via the rice planter.

[0002]

2. Description of the Related Art The above-mentioned lifting control device for a rice transplanter is provided with an elevating operation switch in addition to the artificial elevating operation of a seedling planting device using a rocking operation type lever which has been conventionally used in this type of rice transplanter. The one-touch switch can be used to raise and lower the seedling planting device when turning the ridges in the field, reducing the operational burden on the operator when turning the ridges, and has been used conventionally. It is possible to adopt an operation form by the swing operation type elevating lever, which gives the operator a room to select the operation form. By the way, when raising the seedling planting device in the rice transplanter having the above configuration, the planting clutch must be disengaged in order to prevent the seedlings from being thrown into the air by the planting claws. Conventionally, it was considered that the operation was performed by driving an actuator with a dedicated on / off operation tool.

[0003]

However, as described above, if the structure is such that the operation of turning on and off the planting clutch is performed by a dedicated operation tool, the operation for raising the seedling planting device, that is, the artificial lifting lever is performed. In addition to the switch operation of the raising and lowering operation switch, the operation for engaging and disengaging the planted clutch must be performed separately, and there are multiple switch operation tools,
The maneuvering operation becomes confusing and the operability is deteriorated. The present invention aims to eliminate the above-mentioned problems.

[0004]

According to a characteristic construction of the present invention, in the rice transplanter described at the beginning, the actuator is immediately switched from the clutch disengaged state to the clutch with the switching operation of the artificial lifting lever to the planting position. A first clutch operating means for switching to an engaged state, and a second clutch for switching the actuator from a clutch disengaged state to a clutch engaged state after a set time elapses from the operation point of time when the seedling planting device descending operation of the elevating operation switch is performed. And the operation means.

[0005]

[Operation] When raising the seedling planting device at the time of turning around the ridge, after raising it by the artificial raising / lowering lever, lowering the seedling planting device to set the planting work state, the lever is lowered. By returning to the position and then moving to the planting position, the planting clutch can be set to the on state at the timing according to the operator's intention, and if you want to reduce the troublesome operation of the pilot, move up and down. The seedling planting device can be raised by operating the operation switch, and further the seedling planting device can be grounded and lowered by operating the switch, but from the point of time when this switch was operated, for example, the seedling planting device was grounded and lowered. After that, after a lapse of time required to travel to the predetermined planting work start position, the planting clutch is automatically put into the engaged state, and the planting work can be started as it is.

[0006]

As a result, it is possible to adopt either a conventional operation mode, which is a conventional operation mode, such as a switching operation by an artificial elevating lever or an ascending operation by a one-touch switch operation. While having the advantage of being selectable, the start timing of the planting work after the seedling planting device descends can be set to an efficient one that does not bother the operation and wastes time, thus improving work efficiency. We have been able to provide what we can achieve.

[0007]

Embodiments will be described below with reference to the drawings. Figure 3
Shows a riding type rice transplanter. In this rice transplanter, a seedling planting device 2 is connected to a rear portion of a riding type traveling body via a parallel four-link mechanism 1 so as to be driven up and down by a lift cylinder 3 (an example of a drive mechanism). In the traveling machine body, an engine 6 is mounted in a driving part hood 5 at the front part of the machine body, and the power of the engine 6 is transmitted to front and rear wheels 9 and 10 via a belt type continuously variable transmission 7 and a gear type main transmission 8. The main body drive drive system is supplied to supply the seedling planting device 2 from the main transmission 8 through the transmission shaft 11 and the planting clutch 12. The planted clutch 12 is configured to be engaged and disengaged by an electric motor M with a speed reduction mechanism that can rotate forward and backward. The seedling planting device 2 includes a seedling stand 13 on which a planting seedling is placed and reciprocates left and right, a planting mechanism 14 for taking out one seedling from the lower end of the seedling stand 13 and planting it in a field. It is equipped with a leveling float 15 and the like that is pivotally supported around the rear axis so as to be able to swing up and down, and keeps the height of the seedling planting device 2 against mud in a predetermined posture during running planting work in the field. On the other hand, the elevation control means A for controlling the planting depth of the seedlings at a constant level is provided. That is, as shown in FIG. 1, the vertical swing amount due to the fluctuation of the ground pressure of the ground float at the center of the left and right is detected by the first potentiometer PM1, and the lift cylinder is set so that the detected value of the first potentiometer PM1 falls within the set region. The electromagnetic control valve V of No. 3 is controlled to be switched to maintain the mud surface height in a predetermined posture.

An elevating lever 21 for artificially elevating and lowering the seedling planting device 2 is provided on the side of the driving seat of the traveling machine body, and the elevating lever 21 forcibly raises the seedling planting device 2. Ascending position, neutral position for stopping the elevation and holding that position, descending position for setting the seedling planting device 2 to the ground to lower the automatic control mode, and lowering the seedling planting device 2 for setting the planting clutch 12. It is configured so that it can be freely switched to each of the planting positions that are set to the ON state and set to the automatic control mode. That is, as shown in FIG. 1, the output of the second potentiometer PM2 that detects the swing operation amount of the elevating lever 21 is input to the control device 19, the zone is discriminated based on the detection level of the second potentiometer PM2, and each of the above operation positions is determined. Is configured to perform control corresponding to. In addition, on the lower side of the steering handle, an automatic return swing lever type operation lever that can be freely switched between a state in which the seedling planting device 2 is forcibly raised and a state in which it is lowered to the ground regardless of the operation of the elevating lever 21. A lift operation switch SW1 and a clutch operation switch SW2 of the electric motor M for driving the clutch with planting are provided. A clutch-on detection switch SW3 that detects that the clutch is engaged and a clutch-off detection switch SW4 that detects that the clutch is disengaged are provided near the clutch operating portion of the electric motor M. In the vicinity of the speed change lever 23 of the speed change device 8, a reverse drive state detection switch SW5 for detecting that the speed change lever 23 is operated to the reverse drive position R is provided, and in the vicinity of the link mechanism 1, the seedling planting device 2 is the maximum. A link switch SW6 for detecting that the switch is in the raised position is provided, and each of these switch groups is connected to a control device 19 equipped with a microcomputer. In addition, a time setter 24 for setting a margin time for engaging the planting clutch, which will be described later, is also connected to the control device. Then, the first clutch operating means B for immediately switching the electric motor M from the clutch disengaged state to the clutch engaged state in accordance with the switching operation of the elevating lever 21 to the planting position, and seedling planting of the elevating operation switch SW1. A second clutch operating means C is provided for switching the electric motor M from the clutch disengaged state to the clutch engaged state after a set time has elapsed from the time when the apparatus is descended. Each of the first clutch operating means B, the second clutch operating means C, and the elevation control means A is provided in the control device 19 in the form of a control program, and will be described in detail below together with the control operation of the control device 19.

FIG. 2 shows a control flowchart of the control device 19. First, the set value of the time setter 24 is read [step 1]. This is a grace period from the time of the switch operation when the seedling planting device 2 is lowered by the elevating operation switch SW1 to be described later to the time when the planting clutch 12 is automatically engaged and operated according to the degree of operation skill. Set it. If the elevating lever 21 is in the neutral position, it is set to a stop mode in which the drive of the lift cylinder 3 is stopped and the state is maintained. If it is in the ascending position, the seedling planting device 2
Is set to a raising mode in which the lift cylinder 3 is driven to rise until the maximum raising position is reached [steps 2 to 5]. still,
At this time, the detection of reaching the maximum raised position is detected by turning on the link switch SW6. When the elevating lever 21 is operated to the lowered position, the seedling planting device 2 is grounded and lowered [steps 6 and 7]. When the main shift lever 23 is operated to the reverse position R and the reverse state detection switch SW5 is turned on, the electric motor M is operated to disengage the planting clutch 12, and then the seedling planting device 2 is forcibly lifted [step 8 to. 10]. Then, the reverse drive state detection switch SW5 is turned off, that is, until the main transmission 8 is operated to a position other than the reverse drive position or the lift operation switch SW1 is operated.
The ascending mode is maintained [steps 11 and 12]. When the main transmission 8 is not operated to the reverse position, when the raising / lowering operation switch SW1 is operated, the planting clutch 12 is disengaged and then the seedling planting device 2 is operated to rise [Step 13].
~ 15]. Further, when the raising / lowering operation switch SW1 is not operated, when the raising / lowering lever 21 is switched to the planting position, the electric motor M is operated to activate the planting clutch 12 [steps 16 and 17]. At this time, the operating range of the electric motor M is the clutch-on detection switch SW3.
The clutch disengagement detection switch SW4 is used to make an automatic disconnection operation. Step 14
When the raising / lowering operation switch SW1 is operated again in the ascending mode, the seedling planting device 2 is grounded and lowered [steps 18 and 19], and after a predetermined time artificially set in step 1 has elapsed from the descending operation. Engage and operate the planting clutch 12 [Step 20, Step 1
7]. Further, if the clutch operating switch SW2 is manually operated before the predetermined time elapses, the planting clutch 12 can be engaged and operated regardless of the time elapse [step 21]. Then, when the planting clutch 12 is engaged and actuated, and when the planting operation is started, the automatic lifting control mode as described above is set [step 22]. Less than,
Such control is repeated. The steps 16 and 17 constitute the first clutch operating means B, and steps 18 to 18
The second clutch operating means C is constituted by 20 and step 17, and the lifting control means A is constituted by step 22.

It should be noted that the automatic direction change (U pattern) control of the machine body may be started in synchronization with the raising control of the seedling planting device 2 by the operation of the raising / lowering operation switch SW1.

It should be noted that reference numerals are added to the claims to facilitate the comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a control block diagram.

[Fig. 2] Control flowchart

[Figure 3] Overall side view of rice transplanter

[Explanation of symbols]

 2 Seedling planting device 3 Drive mechanism 12 Planting clutch 21 Manual lift lever B First clutch operating means C Second clutch operating means SW1 Lifting operation switch M Actuator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideaki Mizoda 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd. (72) Kazuo Furukawa, 64, Ishizukita-machi, Sakai City, Osaka Prefecture In-house (72) Inventor Hiroshi Imura 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd.

Claims (1)

[Claims] 1. A seedling planting device (2) is movably connected to a traveling machine body by a drive mechanism (3), and a planting position, a descending position,
A state in which the artificial raising / lowering lever (21) of the seedling planting device (2) is provided and the seedling planting device (2) is forcibly raised preferentially so that the seedling planting device (2) can be freely switched between the neutral position and the forced raising position. An elevating operation switch (SW1) that can be switched to a state of being lowered to the ground is provided, and power is transmitted from the traveling machine body to the seedling planting device (2) via a planting clutch (12) driven by an actuator (M). In the rice transplanter configured as described above, a first clutch for immediately switching the actuator (M) from a clutch disengaged state to a clutch engaged state in response to a switching operation of the artificial lift lever (21) to the planting position. The actuator (B) and the actuator after the set time elapses from the operation point of time when the seedling planting device lowering operation of the elevating operation switch (SW1) is performed. Second clutch operation means for switching the M) from the clutch disengaging state to clutch engaging state (C) and planting machines are equipped with.