JP2001061309A - Rice planting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a rice planting machine instantaneously declutching a fertilization clutch when a lifting/lowering control lever is set at an operation stop position, notwithstanding the state of a planting clutch. SOLUTION: This rice planting machine is provided with a mechanism, in the case of carrying out a declutching operation of a planting clutch C in engaging state by shifting a lifting/lowering control lever 13 from planting position to lowering position, a fertilizing clutch F is instantaneously declutched by transmitting a control force from a first actuating member 101 via a fertilization clutch operating member 104 while retaining the planting clutch C in an engaging state until reaching a timing capable of declutching due to a flexibility of a rectangular hole 102A and when reaching the timing capable of declutching, the declutching operation is carried out by an energizing force of a spring 111 actuating to a planting clutch operating member 105.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice transplanter equipped with a seedling transplanter for transplanting seedlings in a field scene and a fertilizer application device for supplying fertilizer to the field scene. (Hereinafter referred to as a planting clutch) and a technique for controlling a clutch that performs intermittent power supply to a fertilizer (hereinafter referred to as a fertilizing clutch).

[0002]

2. Description of the Related Art Rice transplanters configured as described above include those disclosed in JP-A-9-191718 and those disclosed in JP-A-10-295130. In the former, when the planting clutch (main work clutch 18) is disengaged, the fertilizing clutch (auxiliary work clutch 19) is disengaged before the planting clutch is disengaged, and when the planting clutch is engaged, the planting clutch is disengaged. Before entering, the fertilizer application clutch is operated. In the latter case, the planting clutch (working machine clutch 5
A transmission system for transmitting power to 1) and the fertilizer application clutch are independently formed, and the planting clutch and the fertilizer application clutch (fertilizer application clutch 54) are simultaneously engaged and disengaged.

[0003]

Considering the structure of the planting clutch, the planting clutch is configured as a dog clutch, which is also referred to as a dog clutch. In the posture where the tip of the planting claw of the plant enters the field scene, the cutting state is not set,
It is of a fixed position stop type that sets the cutting state at the timing when the planting claw is separated from the field scene.

[0004] On the premise that a planting clutch having a fixed position stop type is used, the above-mentioned reference 1.
Considering the configuration of this reference 1. In the above configuration, since the wire for operating the planting clutch and the wire for operating the fertilizing clutch are connected to the clutch lever, for example, the end of the wire is simply connected to the operating system of the planting clutch. With such a structure, even when the clutch lever is operated to the disengagement side, the operation of the clutch lever to the disengagement position may be blocked until the time when the planting clutch reaches the disengagement state. Further, on the same premise as described above, reference 2. Considering the configuration of the reference 2. It is unclear what kind of structure the linkage for simultaneously turning on and off the planting clutch and fertilizing clutch in the configuration of
Even when the planting clutch is turned off for the same reason as described above, the fertilizing clutch is not turned off until the planting clutch reaches the disengaged state, and there is room for improvement in wasteful consumption of fertilizer. .

[0005] An object of the present invention is to immediately stop the operation of the operating tool without interrupting the operation when the operation is stopped by the operating tool while the fertilizer is being sprayed simultaneously with the planting of the seedlings. The reason is that a rice transplanter capable of stopping fertilization work is rationally configured.

[0006]

A first feature of the present invention (claim 1) is a rice planting plant having a seedling planting device for transplanting seedlings in a field scene and a fertilizer device for supplying fertilizer to the field scene. And a planting transmission system for transmitting power synchronized with the power transmitted to the traveling device for traveling the aircraft to the seedling planting device, and a fertilizer transmission transmitting power synchronized with the power transmitted to the traveling device to the fertilizer device. And a fixed position stop type planting clutch that cuts off power at a timing when the planting operation section of the planting planting apparatus assumes a preset posture and is independent of the planting transmission system. The fertilizer application clutch that intercepts the power at any time is interposed in the fertilizer transmission system, and when the operating tool for controlling the planting clutch is operated from the entry area to the cut area, the fertilizer application clutch is immediately turned off. And the planting operation section is turned off. Located that it includes an interlock operating mechanism to operate in a state of reaching the timing off the planting clutch, its action and effects are as follows.

According to a second feature of the present invention (claim 2), in accordance with claim 1, the interlocking operation mechanism operates with the first operating member operating to the cut area in conjunction with the operation of the operating tool to the cut area. ,
A fertilizing clutch operating member that switches the fertilizer application clutch based on the operation of the first operating member to the cut area, and a second fertilizing clutch operation member that is allowed to operate to the cut area in conjunction with the operation of the operating tool to the cut area. An actuating member, an implanting clutch operating member for disengaging the implanting clutch when the second operating member is operated to the cut area, and the second operating member in a state where the operation of the second operating member to the cut area is permitted. It is characterized in that it is provided with a flexible means for preventing the operation of the operating member and maintaining the engaged state of the planting clutch until the disengagement timing, and the operation and effect are as follows.

According to a third feature of the present invention (claim 3), in claim 2, the accommodating means applies an operating force from an operating tool to the second operating member so as to prevent the second operating member from operating in the cutting operation direction. (2) It is constituted by a long hole formed at a linking portion for transmitting to the operating member, and is provided with a spring for urging the second operating member in a direction for disengaging and operating the planting clutch. Is as follows.

According to a fourth feature of the present invention (claim 4), the first operating member according to claim 1 wherein the interlocking operation mechanism operates to the cut area in conjunction with the operation of the operating tool to the cut area. ,
A fertilizing clutch operating member that switches the fertilizing clutch based on the operation of the first operating member to the cut area; and a second operating member that operates to the cut area in conjunction with the operation of the operating tool to the cut area. An implanting clutch operating member for transmitting the disengaging operation force of the implanting clutch when the second operating member is operated to the disengagement area; and a planting clutch operating member for operating the disengaging operation force from the implanting clutch operating member. The present invention is characterized in that it is provided with a flexible means for preventing the operation and maintaining the engaged state of the planting clutch until the disengagement timing, and the operation and effect are as follows.

A fifth feature of the present invention (claim 5) is that in claim 4, the linking portion with the second operating member so that the accommodating means prevents the implanting clutch operating member from operating in the disengagement operation direction. And a spring for urging the planting clutch operating member in the direction to operate the planting clutch. The operation and effect are as follows. .

A sixth feature of the present invention (claim 6) is the single operating member according to claim 1, wherein the interlocking operation mechanism operates in the cut area in conjunction with the operation of the operating tool to the cut area. And a fertilizing clutch operating member for disengaging the fertilizing clutch based on the operation of the operating member to the cut area, and a planting clutch for transmitting a cutting operation force to the planting clutch when the operating member is operated to the cutting area. An operating member and a flexible means for preventing the operation of the implanting clutch operating member when the disengaging operation force is applied from the implanting clutch operating member and allowing the implanted clutch to maintain the engaged state until the disengagement timing. The operation and effect are as follows.

A seventh feature (claim 7) of the present invention is that in claim 6, the operating member is configured to be swingable around a support shaft, and the fertilizing clutch operating member is linked to the operating member. Based on the distance from the position to the support shaft, the distance from the position where the planting clutch operating member is linked to the support shaft to this operating member is set to be short, and when operating the operating tool to the cut area, The operation timing is set so that the disengagement operation of the planting clutch is permitted after the disengagement operation of the fertilizing clutch. The operation and effect are as follows.

According to an eighth aspect of the present invention, in the first aspect, the power transmission shaft for transmitting power to the rear wheel, and the one-way clutch for transmitting power from the power transmission shaft to the fertilization clutch according to the first aspect. The operation and effect are as follows.

According to a ninth feature of the present invention, in the first aspect, the operating tool includes an ascending area for raising the seedling planting apparatus and a neutral area for stopping the raising and lowering of the seedling planting apparatus. ,
A lowering region for lowering the seedling planting device and an entrance region for performing the operation of engaging the planting clutch and the fertilizer application clutch are operably provided, and an operation region other than the cutting region is set as the cutting region. In the case where the operation tool is set in the entry area and an operation of moving the traveling body backward is performed, the operation tool is provided with a forced ascending means for setting the operation tool in an ascending area. And the effect is as follows.

[Action]

According to the first feature, when the operating tool is operated from the entry area to the cut area, the interlocking operation unit immediately turns off the fertilizing clutch, and the planting operation unit is in the off timing. , The planting clutch is immediately turned off and the planting clutch is turned off when the planting operating portion reaches the cutting timing, even if the planting operating portion is not at the cutting timing, and the planting clutch is set to the off state Will do.

According to the second feature, when the operating tool is operated from the entering area to the cutting area, the first operating member operates in the cutting area, and based on this operation, the operating force of the fertilizing clutch operating member is used. When the fertilizer application clutch is disengaged and the operating tool is operated from the entry area to the disengagement area, the disengagement operation force from the second operating member is transmitted to the planting clutch via the planting clutch operating member. Becomes If it is not the timing at which the planting clutch can be disengaged when the disengagement operation force is transmitted in this manner, the accommodation means allows the operation tool to operate in the cut area while the second operating member moves in the cutting direction. This prevents operation and allows the planted clutch to remain engaged.

According to the third feature, when the operating tool is operated from the entry area to the disengagement area and the planting clutch is not in a disengageable timing, the operation force is transmitted to the portion where the operation force is transmitted to the second operating member. The operation of the second operating member in the disengagement direction is prevented by the formed long hole, so that the planting clutch is maintained in the ON state. The second operating member is actuated by the urging force, and this operating force is transmitted in the direction of disengaging the planting clutch via the planting clutch operating member, and the planting clutch is disengaged.

According to the fourth feature, when the operating tool is operated from the entry area to the cut area, the first operating member operates in the cut area, and based on this operation, the first operating member is operated by the operating force of the fertilizing clutch operating member. When the fertilizer application clutch is turned off and the operating tool is operated from the entry area to the cutoff area,
The operating member operates in the cut area, and the cutting operation force is transmitted to the planting clutch via the planting clutch operating member. If it is not the timing at which the planting clutch can be disengaged when the disengaging operation force is transmitted as described above, the interchangeable means allows the second operating member to operate to the disengaged area while disengaging the planting clutch operating member. The operation in the direction is prevented, so that the state of engagement of the planting clutch can be maintained.

According to the fifth feature, when the operating tool is operated from the entering area to the cutting area and the planting clutch is not at a timing capable of being disengaged, the second operating member is operated in the disengaging direction by this operating force. However, the operation of the planting clutch operating member in the disengagement direction is prevented by the elongated hole formed in the second operating member, so that the planting clutch is maintained in the engaged state, and thereafter, the planting clutch is disengaged. When the possible timing is reached, the planting clutch operating member is actuated by the biasing force of the spring, and the planting clutch is disengaged by this operating force.

According to the sixth feature, when the operating tool is operated from the entry area to the cut area, the operating member is operated to the cut area, and the fertilizer application clutch is operated by the operating force of the fertilization clutch operating member in conjunction with this operation. , And the operating force is transmitted to the planting clutch via the planting clutch operating member based on the operation of the operating member to the cutting area. Also, if the timing at which the planting clutch is not able to be disengaged when the disengaging operation force is transmitted in this manner, the accommodation means allows the operating member to operate in the cut area while maintaining the engaged state of the planting clutch. It will be.

According to the seventh feature, when the operating tool is operated from the entering area to the cutting area, the operating member reaches the entering area by swinging around the support shaft, and at the time of this swinging, the fertilizing clutch operates. By operating the member with a stroke larger than the planting clutch operating member, the fertilizer application clutch can be reliably turned off earlier than the planting clutch.

According to the eighth feature, since the fertilizer is driven via the fertilizer clutch only during running, the fertilizer is surely synchronized with the running speed at the time of running to transplant the seedlings to the field scene. Even if the fertilizer application clutch is engaged, when the aircraft is moved backward, the one-way clutch does not transmit power, so that fertilizer is not sent out from the fertilizer and wasteful consumption of fertilizer Nothing to do.

According to the ninth feature, when the operation of moving the traveling body backward is performed in a state where the operating tool is set in the entry area, the operating tool is set in the ascending area. The clutch and the planting clutch are disengaged and the seedling planting device is raised.

[Effect of the Invention] Therefore, when there is an operation to stop the operation by the operating tool during the operation of spraying the fertilizer simultaneously with the planting of the seedlings, the operation of the operating tool is controlled by the interlocking operation mechanism. The rice transplanter that can immediately stop the fertilization operation without hindering it and also stop the transplanting operation of the seedlings without difficulty was rationally configured (claim 1). Also, by providing the interlocking operation mechanism with the two operating members and the accommodating means, a reasonable operation is possible (claims 2 and 4), and the accommodating means can be configured with a simple structure of a long hole and a spring ( In the third and fifth aspects, the interlocking operation mechanism is provided with one operating member and the accommodating means, so that it is possible to perform a reasonable operation while having a simple structure (Claim 6). According to the setting, the fertilizer application clutch can be reliably and promptly turned off (Claim 7), and the fertilizer can be applied every time the traveling body travels a unit distance without wasteful consumption of fertilizer when the vehicle is moving backward (Claim 8). In the case where the operation of moving the body backward in the state where the seedling planting device is in the lowered position is performed, the operator does not need to perform any special operation while turning off the fertilizing clutch and the planting clutch. Rise Ridge is became shall be avoided contact with the ground projections and NaeUe with apparatus Te (claim 9).

[0026]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a drive-type front wheel 1 and a drive-type rear wheel 2 that are steered.
The engine 4 is mounted on the front part of the traveling body 3 provided with the engine, and the hydrostatic continuously variable transmission H, in which the power from the engine 4 is transmitted to the front part of the traveling body 3, And a rear axle case 6 at a rear position to which power from the transmission case 5 is transmitted, and a steering handle 7 at the center of the traveling body 3. Driver seat 8
And a rear end portion of the traveling machine body 3 is moved up and down by a lift cylinder 9 as a hydraulic actuator through a parallel quadruple link mechanism L for a six-row planting as a ground working device. The seedling planting device A is connected, and a fertilizer application device B is provided at the rear of the traveling machine body 3 to constitute a rice planting machine.

The transmission case 5 has a differential mechanism (not shown) for transmitting power to the left and right front wheels 1, 1 and an inter-stock transmission mechanism for setting the number of seedlings planted by the planting apparatus A per unit traveling distance. (Not shown), and a planting clutch C for transmitting and interrupting power from the transmission case 5 to the seedling planting device A. A transmission mechanism (not shown, not provided with a differential mechanism) for transmitting power to the left and right rear wheels 2, 2 is provided in the rear axle case 6.
Left and right clutch brake mechanisms 10, 10 for turning off the power transmitted from the transmission mechanism to the left and right rear wheels 2, 2 and simultaneously applying a braking force are incorporated.
The traveling device is constituted by the front and rear wheels 1 and 2.

The meter panel MP in front of the driver's seat 8
A main shift lever 11 for shifting the continuously variable transmission H is disposed on the left side of the gearbox. A gear-type auxiliary transmission (not shown) in the transmission case is shifted on the left side of the driver's seat 8. A sub-shift lever 12 is provided, and a raising / lowering lever 13 as an operating tool for controlling the raising and lowering of the seedling planting device A is provided on the right side of the driver seat 8, and the seedling planting device A is moved up and down by following the field scene S. Sensitivity adjustment lever 14 for setting sensitivity for control
(See FIG. 10).

As shown in FIGS. 1 and 2, the link mechanism L is composed of a pair of left and right top links 17, a pair of left and right lower links 18, and a vertical link 19 at the rear end. The transmission case 20 of the seedling planting apparatus A is rotatably connected to the section. The seedling planting apparatus A includes the transmission case 20 to which power is transmitted from the traveling machine body 3 via the transmission shaft 21, a rectangular pipe-shaped pipe frame 22 connected to the transmission case 20, and the pipe frame 22. , The front ends of which are fixedly connected to each other, and the power from the transmission case 20 is branched and transmitted, and the rotary case 2 which rotates around the axis in a lateral posture at the left and right positions at the rear of each chain case 23.
4 and a planting arm 25 attached to the rotary case 24, and is provided with a seedling mounting table 26 on which a mat-shaped seedling W is mounted and three leveling floats 27. The planting claw 25A of the planting arm 25 is configured to cut out the seedlings one by one from the lower end of the mat-shaped seedling W placed on the seedling placing stand 26 and plant the seedlings in the field scene S.

As shown in FIGS. 2 to 5, a planting depth adjusting shaft 30 is provided at the rear of the pipe frame 22 in a posture parallel to the pipe frame 22 so as to be rotatable around its axis. The three leveling floats 27 are supported at the rear ends of three sets of arms 31 extending rearward from the depth adjusting shaft 30 so as to be swingable around a support shaft 29 in a laterally oriented posture. By locking and holding the planting depth adjusting lever 32 connected to the adjusting shaft 30 to the lever guide 33, the leveling float 27 with respect to the operating locus T of the planting claw 25A is provided.
Of the seedlings with respect to the field scene S can be adjusted by changing the vertical distance of the seedlings. The center of the leveling float 27 at the center position in the left and right direction is the center position in the left and right direction of the front part of the float 27.
A link 35 is provided, and the second link 37 is swingably supported on the pipe frame 22 at a position corresponding to the link 35 so as to be swingable around a second support shaft 36 in a lateral posture.
7 is connected by a connecting shaft 38 so as to be able to bend and stretch freely, thereby forming a bending and stretching link that guides the vertical operation of the front part of the leveling float 27 while preventing the horizontal movement of the leveling float 27.

The leveling float 27 is positioned between the bending link and the planting depth adjusting lever 32 in plan view.
A vertical link 40 in a vertically long position so as to be swingable about an axis 39 in a horizontal position, and a front end of a bracket 41 provided in a cantilever shape toward the front with respect to the pipe frame 22. A swing link 43 is provided so as to be swingable about a shaft 42, and a pin 44 provided in a lateral position at the front end side of the swing link 43 is drilled in a position in which the longitudinal direction is directed vertically to the vertical link 40. A tension type sensing spring 45 is provided between the upper end of the vertical link 40 and the pin 44, and the rear end of the swing link 43 is connected to the planting depth adjustment lever 32 by a rod. They are connected at 46. Also, the outer wire 47A of the operation wire 47
Is connected and fixed to the upper end of the vertical link 40, and the inner wire 47B of the operation wire 47 is connected to the pin 44, so that the seedling planting apparatus A moves downward (close to the field scene S) with reference to the field scene S. When the front end side of the leveling float 27 swings upward, the upper end of the vertical link 40 and the pin 44
And the inner wire 47B is pulled, the seedling planting device A is displaced upward with respect to the field scene S (a side away from the field scene S), and the front end side of the leveling float 27 is lowered. The operation direction is set so that when the rocker swings, the distance D between the upper end of the vertical link 40 and the pin 44 is reduced to loosen the inner wire 47B. Further, for example, when the planting depth adjusting lever 32 is operated on the deep planting side (the side on which the operating end of the lever 32 is operated downward in the figure), the swing link 43 is provided.
The height of the pin 44 is displaced upward by an amount equal to the lifting amount of the terrain float 27 by swinging the front end of the lifter to the lifting side to maintain the value of the distance D and maintain the sensitivity of the elevation control. I have.

As shown in FIGS. 1, 6, and 7, the fertilizer applicator B includes a hopper 50 for storing granular or powdered fertilizer, and a feeding mechanism for feeding six fertilizers from the hopper 50. 51, a blower blower 52 driven by a blower motor 52 </ b> M to send the fertilizer fed from the feeder mechanism 51 by wind pressure, six fertilizer application hoses 53 to which fertilizer is sent by a blowing action from the blower blower 52, The fertilizer is supplied with fertilizer from the fertilizing hose 53 to the bottom of the field scene S, and is provided with six groovers 54 supported by the leveling float 27. Also, the feeding mechanism 51
Is provided with a feeding roller 51B built in a case 51A, and a fertilizing clutch F provided on a transmission shaft 56 for transmitting the power for rotating the rotation shaft of the feeding roller 51B from the transmission case 5 to the rear axle case 6. The fertilizer is fed out in synchronization with the running speed by transmitting from the vehicle. The fertilizing clutch F operates the switching arm 58 provided in the case 57 to the “ON” position (see FIG. 15) to thereby transfer the power from the transmission shaft 56 to the output shaft 5.
9 by operating the switching arm 58 to the "OFF" position so as not to transmit power to the output shaft 59. The crank arm 60 provided on the output shaft 59 and the feeding roll 5
An arm 61A of a one-way clutch 61 that transmits power to the rotation shaft of 1B is interlocked and connected via a rod 62.

As shown in FIGS. 8 and 9, the fertilizing clutch F has a case 57 in which only the rotational power of the body 3 during forward movement is transmitted from the transmission shaft 56 to the case 57 via the one-way clutch 63. A first bevel gear 64, a second bevel gear 65 meshing with the first bevel gear 64, the output shaft 59 arranged coaxially with the second bevel gear 65, a shift member 66 slidable with respect to the output shaft 59, Occlusal claw 65A of two bevel gear 65 and occlusion claw 66 of shift member 66
A operating shaft 67 which slides the shift member 66 to switch on and off the clutch portion based on the operation of the switching arm 58.
It is comprised including.

As shown in FIGS. 10 to 15, a sector plate 73 is idlely supported on a swing support shaft 72 which is swingably supported around an axis centered in a lateral position with respect to the body frame 71. The elevating lever 13 is supported so as to be swingable in the left-right direction around the support shaft 74 in the front-back posture with respect to the side surface of the plate 73. Further, three concave portions 73A are formed in an arc portion below the sector plate 73, and an engaging arm 76 provided at a swing end with a roller 75 fitted in the concave portion 73A is urged by a spring 77 in an engaging direction. It is supported so as to be able to swing around the axis in a lateral orientation with respect to the body frame 71. With the posture of the sector plate 73 in which the roller 75 engages with these concave portions 73A, the lifting lever 13 is
As shown in the figure, the "neutral" position, the "down" position, and the "planting" position are held in the respective operating positions, and the lift lever 13 is not formed with a concave portion at a position corresponding to the "up" position, and the roller 75 is A stopper 73B that determines the swing limit of the sector plate 73 by the contact of the sector plate 73 is formed on the sector plate 73.

An adjusting lever shaft 80 that swings integrally with the body frame 71 at the base end of the sensitivity adjusting lever 14 is supported so as to be swingable around a laterally oriented axis. A rotation restricting piece 81 is fixed to the adjusting arm 82, and the adjustment arm 82, whose contact with the rotation restricting piece 81 restricts the swinging end from moving backward, is rotatable relative to the adjusting lever shaft 80. And a spring 83 for contacting the adjustment arm 82 with the rotation restricting piece 81, and connecting and fixing the end of the outer wire 47A of the operation wire 47 to the swinging end of the adjustment arm 82. It is. As shown in the figure, the sensitivity adjusting lever 14 is configured to be locked and held by the lever guide 84 in a region between “sensitive” and “dull”.

The outer arm 47 is connected to the adjusting arm 82.
Inner wire 47B of operation wire 47 to which A is connected
Is linked with a control valve V that supplies and discharges hydraulic oil to and from the lift cylinder 9 as will be described later.
In this case, when the outer wire 47A is operated to the rear side, the outer wire 47A is sent rearward and the inner wire 47B is pulled. As a result, the end of the outer wire 47A on the leveling float 27 side shown in FIG. 40) and the end D of the inner wire 47B (the position of the pin 44).
Is shortened and the target attitude of the leveling float 27 changes to the forward-lowering attitude, and at the same time, the leveling float 27 is
As a result, the leveling float 27 can easily swing and the sensitivity increases,
When the operation is performed to the "dull" side, the outer wire 47A is fed forward and the inner wire 47B is in the same state as the operation when the inner wire 47B is operated to the slack side. As a result, the end (vertical) of the outer wire 47A on the leveling float 27 side is set. Distance D between upper end of link 40) and end of inner wire 47B (position of pin 44)
Is expanded and the target attitude of the leveling float 27 changes to the forward-upward attitude, and at the same time, the leveling float 27 is
As a result, the swing of the leveling float 27 is suppressed, and the sensitivity is increased.

A contact arm 86 is freely rotatably supported on the pivot shaft 72, and a contact bolt 87 is provided on the sector plate 73 for contacting the upper end of the contact arm 86. A roller type contact portion 86A is formed on the lower end side. Further, an intermediate shaft 88 having a posture parallel to the swing support shaft 72 is provided, and a first arm 89 and a second arm 90 which are substantially vertically oriented with respect to the intermediate shaft 88 swing together with the intermediate shaft 88. The first arm 89 has an intermediate shaft 8
8 are arranged relative to each other so that the contact portion 86A of the contact arm 86 can come into contact with a portion located above the position 8, and a return spring 91 that pulls the lower end of the first arm 89 forward is provided. The inner wire 47B of the operation wire 47 is provided in a hole formed in the lower swing end of the first arm 89.
Are inserted and connected by engagement. The return spring 91 links the operation wire 92 with the main shift lever 11, and the operation direction is set so that the urging force is increased as the main shift lever 11 is operated at a higher speed.

A control valve V is connected and fixed to the rear upper surface of the transmission case 5. A spool 95 slidably operable in a front-rear direction and urged backward by a spring 94 is attached to the control valve V. Equipped with this spool 95
And a contact operation arm 96 for operating the spool 95 in contact with the control valve V so as to be swingable about an axis 97 in a vertical position with respect to the control valve V. An operation rod 98 is interposed between the swing arm and the swinging end of the second arm 90. The spool 95 is operated to the side where it is pushed in against the urging force of the spring 94, thereby draining the oil from the lift cylinder 9 to lower the seedling planting apparatus A, and in the projecting direction by the urging force of the spring 94. By actuating, the operation oil is supplied to the lift cylinder 9 to raise the seedling planting apparatus A, and by being held at the intermediate position, the operation form is stopped so that the supply and discharge of the operation oil is stopped and the ascent and descent are not performed. Is set.

An arc-shaped long hole 73C centering on the axis of the swing support shaft 72 is formed in the sector plate 73, and is supported at the lower part of the fuselage so as to be able to swing around the support shaft 100 in a horizontal posture. The first operating member 101 and the second operating member 102
And the first operating member 101 has a round hole 1
01A, and an arc-shaped long hole 102A centering on the axis of the support shaft 100 is formed in the second operating member 102, and the upper end and the lower end pass through the long hole 73C of the sector plate 73. An operating rod 103 that penetrates the round hole 101A of the first operating portion 101 and the elongated hole 102A of the second operating member 102 is provided. Also, a rod-shaped fertilizing clutch operating member 104 is interposed between the first operating member 101 and the switching arm 58 of the fertilizing clutch F, and the second operating member and the planting clutch C built in the transmission case 5 are mounted. A rod-shaped planting clutch operating member 105 is interposed between the operating system and the operating system.

The planting clutch C transmits the rotational driving force synchronized with the traveling speed, and the planting clutch C interrupts the rotational driving force only at a position where the planting claw 25A of the planting arm 25 is separated from the field scene S. And an arm 108 having one end engaged with the rod 107 with respect to the transmission case 5. The arm 108 is swingably supported around a shaft 109 in a vertical position.
The end of 5 is linked to a double nut type so that the length can be freely adjusted. The first operating member 101 is linked to apply the urging force of the first spring 110 in the direction of disengaging the fertilizing clutch F, and the second operating member 102 is engaged in the direction of disengaging the planting clutch C. A second spring 111 for applying a biasing force is linked to the second spring 111.

A plate 114 is provided which is linked to a pin 113 provided on the engagement arm 76 through a long hole 114A. When the main speed change lever 11 is operated in a reverse range, the plate 114 is pulled downward. Main shift lever 1 so as to operate engagement arm 76 in the non-engagement direction.
Connecting a wire 115 associated with 1 to a plate 114,
Further, when the plate 114 is pulled by the wire 115, the spring 116 for swinging the sector plate 73 is moved to the side for operating the lifting lever 13 to the raised position.
14 is provided. Further, the other end of the feedback link 117 whose one end is linked to the link mechanism L is linked to the sector plate 73 so as to rotate the sector plate 73 in a direction opposite to the biasing direction of the spring 116. . This configuration is for performing so-called backup control, and when the main transmission lever 11 is operated in the reverse region, the engagement of the roller 75 with the concave portion 73A of the sector plate 73 is released by the pulling operation force of the wire 115. And
The raising / lowering lever 13 is switched to the “up” position by the urging force of the spring 116 to start raising the seedling planting apparatus A. When the seedling planting apparatus A rises to a predetermined height due to the rise, the operating force from the feedback link 117 is actuated. To return the raising / lowering lever 13 to the "neutral" position to end the lifting control.

With this configuration, when the lifting lever 13 is operated from the “neutral” position to the “up” position, the contact portion 86 A of the contact arm 86 contacts the upper end of the first arm 89 in the pressing direction. 11 to rotate the intermediate shaft 88 in the clockwise direction in FIG.
As a result of the operation rod 98 being pulled by the swing of 0, the spool 95 of the control valve V is operated to the ascending position by the urging force of the spool spring 94 and hydraulic oil is supplied to the lift cylinder 9 so that the seedling planting device is A rises.

Next, when the lift lever 13 is operated from the "neutral" position to the "down" position, the contact portion 8 of the contact arm 86 is moved.
6A is displaced away from the upper end of the first arm 89, the intermediate shaft 88 is rotated counterclockwise in FIG. 11 by the urging force of the return spring 91, and the second arm 90 swings due to this rotation. As a result of the operation rod 98 being pushed by motion,
When the spool 95 of the control valve V is operated to the lowered position and the hydraulic oil is discharged from the lift cylinder 9, the seedling plant A
Descends. When the seedling planting apparatus A descends in this way, the leveling float 27 comes into contact with the field scene S and the operation wire 47
The inner wire 47B reaches a tension state, and the return spring 9
The force from the operation wire 47 is transmitted to the spool 95 of the control valve V via the second arm 90 and the operation rod 98 against the urging force of 1 and when the spool 95 is operated to the neutral position N, The lowering of the seedling planting device A stops. When the lowering of the seedling planting apparatus A has stopped, the leveling float 2
7 is maintained at the target posture, and when the posture of the leveling float 27 deviates from the target posture due to a change in the relative distance between the seedling planting apparatus A and the field scene S, the control valve V is operated by the operation force from the operation wire 47. Is operated to raise and lower the seedling planting apparatus A so as to maintain the leveling float 27 in the target posture. When the sensitivity adjusting lever 14 is operated during the automatic lifting / lowering control, the target attitude of the terrain float 27 changes due to the change of the reference position of the outer wire 47A as described above, and the urging force of the sensing spring 45 changes. Therefore, the sensitivity of the elevation control can be adjusted. In particular, when the leveling float 27 is lifted significantly in a short time, such as when the leveling float 27 has climbed on a cliff, the inner wire 47B is pulled, but the adjusting arm 82 is moved by the spring 83. As a result, the spool 95 does not exert an excessive force on the spool 95 as a result of swinging in a direction to reduce the amount of pulling operation of the inner wire 47B against the urging force of the inner wire 47B.

Next, as shown in FIG.
Is operated from the "down" position to the "planting" position, since the contact portion 86A of the contact arm 86 is already separated from the upper end of the first arm 89, the automatic raising and lowering of the seedling planting device A is performed. While the control state is maintained, the upper end of the operating rod 103 contacts the end of the elongated hole 73C of the sector plate 73, and the first operating member 1 is actuated by the operating force from the operating rod 103.
01, the switching arm 58 of the fertilizing clutch F is operated by the force of the fertilizing clutch operating member 104 linked to the first operating member 101 to start the fertilizing in the fertilizing apparatus B, and the operating rod 103 The second operating member 102 is swung by the operating force of the second operating member 102, and the contact operating arm 108 of the planting clutch C is operated by the force of the planting clutch operating member 105 linked to the second operating member 102 to plant the seedling. The planting with the device A is to be started.

When the planting operation of the seedling is interrupted from the state where the raising and lowering lever 13 is set to the "planting" position as described above, the raising and lowering lever 13 is moved to the "downward" position as shown in FIG. When the operation is performed, the end of the operating rod 103 is displaced from the end of the elongated hole 73C of the sector plate 73 in a direction away from the end, and as a result, the first operating member 101
The fertilizing clutch operating member 104 swings with an urging force of zero.
When the switching arm 58 is moved to the disengaged position by the force from the lever, the fertilizer application clutch F is immediately disengaged, and when the operating rod 103 is displaced in this manner, the lower end of the operating rod 103 is connected to the second operating member. When the planting clutch C can be displaced in the long hole 102A and the urging force of the second spring 111 acts on the second operating member 102 but is not at the timing at which the planting clutch C can be disengaged, FIG. As shown, the second operating member 102 is maintained in a posture corresponding to the engaged state of the planting clutch C, and the implanting clutch C also maintains the engaged state. Thereafter, when the timing at which the planting clutch C can be disengaged is reached, the second operating member 102 swings by the urging force of the second spring 111, and the contact operating arm 96 is moved by the force from the planting clutch operating member 105. Operate the cutting position to set the planting clutch C
Reaches the cutting state.

As described above, in the present invention, the sector plate 7
3, the system for operating the fertilizing clutch F and the planting clutch C, ie, the operating rod 103 and the first operating member 10
1, second operating member 102, fertilizing clutch operating member 10
4. An interlocking operation mechanism is constituted by a system including each of the planting clutch operation member 105, the first spring 110, and the second spring 11,
In addition, among the members constituting the link operation mechanism, a slot 73C formed in the sector plate 73 and the second spring 111 constitute a flexible means. Then, based on the operation of the raising / lowering lever 13, the fertilizer application clutch B is turned on / off to start and stop the spraying of the medicine by the fertilizer device B,
The planting clutch C can be turned on and off to start and stop the planting of the seedling by the seedling planting device A. In particular, the raising / lowering lever 13 is moved "down" from the "planting" position.
When operated in the direction of the position, that is, when an operation for stopping the operation is performed, the fertilizer application clutch F is immediately operated in conjunction with the operation of the elevating lever 13 to eliminate wasteful consumption of fertilizer, and If the attaching clutch C is not in a disengageable state, it is allowed to maintain the on-set state until the planting clutch C can be disengaged, and when the disengaging timing is reached, the urging force of the second spring 111 causes Planting clutch C
Is turned off.

[Other Embodiments] In addition to the above-described embodiment, the present invention can be implemented by configuring an interlocking operation mechanism as follows. In the following embodiments, those having the same functions as those of the above embodiment are denoted by the same reference numerals and symbols.

(A) As shown in FIG. 18, as a modification of the above embodiment, the operating rod 103 is connected to the second operating member 1.
02 through a circular hole, so that the first operating member 101 and the second operating member 102 are simultaneously operated to operate simultaneously, and the axis of the support shaft 100 with respect to the second operating member 102. Is formed in a circular arc-shaped long hole 102B centered on the
The second spring 111 is inserted through the end portion of the planting clutch 05 and applies a biasing force to the planting clutch operating member 105 in a direction to enter and operate the planting clutch C. With this configuration, when the elevating lever 13 is operated from the planting position to the descending position, as shown in FIG. 19, the fertilizing clutch F and the planting clutch C
Can be controlled.

(B) As shown in FIG.
03, the single actuating member 120 which is rocked
Swingable around 0 and fertilizing clutch F with spring 121
And the operating member 12
0 and the switching arm 58 of the fertilizing clutch F are linked by a fertilizing clutch operating member 104, and the operating member 120 has an arc-shaped long hole 120 centered on the axis of the support shaft 100.
A is formed, an end of the planting clutch operating member 105 is inserted into the elongated hole 120A, and an urging force is applied to the planting clutch operating member 105 in a direction to enter and operate the planting clutch C. The spring 122 to be operated is linked. Further, a distance R1 from the position of the support shaft 100 to a position at which the planting clutch operating member 105 is linked to the operating member 120.
On the other hand, when the distance R2 from the center position of the support shaft 100 to the position at which the fertilizing clutch operating member 104 is linked to the operating member 120 is increased, and when the planting clutch C and the fertilizing clutch F are both engaged, When the operating member 120 is swung in the direction in which the respective clutches are disengaged, the linkage is set such that the fertilizing clutch F reaches the disengaged state first and the planting clutch C reaches the disengaged state later, as shown in FIG. I do.

The present invention can be applied to a system having a drive system for operating the fertilizing clutch F and the planting clutch C by the driving force of an actuator as described below, in addition to the above embodiment. It is. In the following embodiments, those having the same functions as those of the above embodiment are denoted by the same reference numerals and symbols.

(C) As shown in FIG.
A plate 126 swinging integrally with the lifting lever 13 with respect to the auxiliary frame 125 connected to the bolt 1 is supported so as to be swingable around an axis in a lateral posture, and the axis is determined so as to determine the operation position of the plate 126. A plurality of through-holes 126A are drilled on an arc locus centered on a circle, and ball detent-type positioning means (not shown) that engages with these through-holes 126A is provided, and the amount of swing of the plate 126 is measured. The auxiliary frame 125 is provided with a potentiometer type lever sensor 127. Further, the detection arm 12 is swingable about the axis centered in the lateral direction with respect to the auxiliary frame 125.
8 and a potentiometer type level sensor 129 for measuring the amount of swing of the detection arm 128. An upper wire of the detection arm 128 is connected to an inner wire 47B of the operation wire 47. A tension coil type return spring 130 is provided between the return spring 130 and the frame 125. Further, a crank arm 132 is provided rotatably around a drive shaft 131 in a lateral orientation with respect to the auxiliary frame 125, and an electric motor 133 for rotating the crank arm 132 is supported by the auxiliary frame 125. The operating rod 103 connected to the swing end of the crank arm 132 is linked to the first and second operating members 101 and 102.

In this configuration, when the lever sensor 127 measures that the raising / lowering lever 13 has been set to the "planting" position in a state where the seedling planting device A is at the rising position, the solenoid valve (FIG. (Not shown) is electrically operated to raise and lower the seedling planting apparatus A, and the lowering of the seedling planting apparatus A causes the inner wire 47B of the operation wire 47 to be tensioned, and the posture of the detection arm 128 is set to a target set in advance. When the posture is reached, a control form of elevating is set to operate the solenoid valve so as to maintain this posture and to elevate and lower the seedling planting apparatus A.
When the lever sensor 127 measures that the elevating lever 13 has been set to the “planting” position, the electric motor 133
Is actuated only for a preset time so that the operating rod 10
3 was pressed down to engage the fertilizing clutch F and the planting clutch C, and then the lever sensor 127 measured that the lifting lever 13 was operated from the "planting" position to the "down" position. In this case, the operating rod 103 is pulled up by reversing the electric motor 133, and the first and second operating members 102, 102 are rocked to disengage the fertilizing clutch F and the planting clutch C. Become. When the fertilizing clutch F and the planting clutch C are switched off in this manner, the fertilizing clutch F is immediately switched off by the operation mode described in the above embodiment, and the planting clutch C is operated.
Keeps the on state until the cut-off timing is reached, and at this timing the cut-off state is set. It should be noted that the configuration of (c) of the other embodiment is different from the configurations of (a) and (b) of the other embodiment.
It is also possible to apply the configuration of FIG.

[Brief description of the drawings]

FIG. 1 is an overall side view of a rice transplanter.

FIG. 2 is a side view of the seedling planting apparatus.

FIG. 3 is a side view showing a linkage structure between a leveling float and an operation wire.

FIG. 4 is a front view showing a linkage structure between a leveling float and an operation wire.

FIG. 5 is a plan view showing a linkage structure between a leveling float and an operation wire.

FIG. 6 is a rear view of the fertilizer application device.

FIG. 7 is a longitudinal sectional side view of the fertilizer application device.

FIG. 8 is a longitudinal sectional view of a fertilizing clutch.

FIG. 9 is a cross-sectional view of a fertilizing clutch.

FIG. 10 is a side view showing an operation system from a lifting lever.

FIG. 11 is an enlarged side view showing the structure of the linkage of the lifting lever.

FIG. 12 is a plan view showing a structure of a linkage relationship of a lifting lever.

FIG. 13 is a side view of the first and second operating members.

FIG. 14 is a cross-sectional plan view of the first and second operating members.

FIG. 15 is an exploded view showing linkage of a lifting lever.

FIG. 16 is an exploded view showing a linkage relationship in a state where the lifting lever is set at the planting position.

FIG. 17 is a developed view showing the linkage immediately after the lifting lever is operated to the lower position.

FIG. 18 is an exploded view showing a linking relationship in a state where the elevating lever is set to the planting position in another embodiment (a).

FIG. 19 is a developed view showing the linkage immediately after the elevating lever is operated to the lowered position in another embodiment (a).

FIG. 20 is an exploded view showing a linkage relationship in a state where the elevating lever is set to the planting position in another embodiment (b).

FIG. 21 is a side view showing an operation system according to another embodiment (c).

[Explanation of symbols]

 1, traveling device 2 rear wheel 3 fuselage 13 operating tool 56 transmission shaft 63 one-way clutch 101 first operating member 102 second operating member 102A long hole 102B long hole 104 fertilizing clutch operating member 105 planting clutch operating member 100 support shaft 111 Spring 120 Operating member A Seedling planting device B Fertilizing device C Planting clutch F Fertilizing clutch S Field scene R1 Distance R2 Distance

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinsuke Kotani 64 Ishizukita-cho, Sakai City, Osaka Prefecture F-term in Kubota Sakai Works (reference) 2B060 AA10 AC03 AD09 AE10 BA04 BA07 BA09 BB06 CA04 CA19 CB06 CB18 CC07

Claims (9)

[Claims] 1. A rice transplanter comprising a seedling transplanter for transplanting seedlings in a field scene and a fertilizer device for supplying fertilizer to the field scene, the rice transplanter being synchronized with power transmitted to a traveling device for moving the machine body. A planting power transmission system that transmits power to the seedling planting device and a fertilizer transmission system that transmits power synchronized with the power transmitted to the traveling device to the fertilizer device are formed independently, and the planting device of the seedling planting device is formed. A fixed position stop type planting clutch that cuts off the power at a disengagement timing at which the working unit takes a preset posture is interposed in the planting transmission system, and the fertilization clutch that shuts off the power at any time is connected to the fertilization transmission system. When the operating tool for controlling the planting clutch is operated from the entry area to the cutting area, the fertilizer application clutch is immediately turned off and the planting operation section reaches the disengagement timing. The planting clutch is turned off and activated Rice planting machine is equipped with an interlocking operation mechanism to. A first operating member that operates to the cut area in conjunction with an operation of the operating tool to the cut area; and the first operating member operates based on the operation of the first operating member to the cut area. A fertilizing clutch operating member for turning off the fertilizing clutch,
A second operating member that is allowed to operate to the cut area in conjunction with the operation of the operating tool to the cut area, and a planting clutch operation that operates to switch the planting clutch when the second operating member is operated to the cut area. A member and, in a state where the second operating member is permitted to operate in the cut area, a flexible means for preventing the operation of the second operating member and maintaining the engaged state of the planting clutch until the disconnection timing. The rice transplanter according to claim 1, wherein the rice transplanter is configured. 3. The communication device according to claim 1, wherein the accommodating means includes an elongated hole formed at a linking portion for transmitting an operating force from an operating tool to the second operating member so as to prevent the second operating member from operating in the cutting operation direction. 3. The rice transplanter according to claim 2, further comprising a spring for urging the second operating member in a direction in which the planting clutch is disengaged. 4. A method according to claim 1, wherein said interlocking operation mechanism operates in response to an operation of said operating tool to said cut area, said first operating member being operated to said cut area, and said first operating member being operated to said cut area. A fertilizing clutch operating member for turning off the fertilizing clutch,
A second operating member that operates to the cut area in conjunction with the operation of the operating tool to the cut area; and a planting clutch operation that transmits the cutting operation force of the planting clutch when the second operating member operates to the cut area. And a flexible means for preventing the operation of the planting clutch operating member when the disengaging operation force is applied from the planting clutch operating member and maintaining the engaged state of the planting clutch until the disengagement timing. The rice transplanter according to claim 1. 5. The planting clutch operating member, wherein the accommodating means comprises an elongated hole formed at a portion linked to the second operating member so as to prevent the planting clutch operating member from operating in the disengaging operation direction. 5. The rice transplanter according to claim 4, further comprising a spring for biasing the planting clutch in a direction for operating the clutch. 6. A single operating member, wherein the interlocking operation mechanism operates on the cut area in conjunction with the operation of the operating tool to the cut area, and the fertilizer application is performed based on the operation of the operating member on the cut area. A fertilizing clutch operating member for disengaging a clutch, a planting clutch operating member for transmitting a disengaging operation force to the planting clutch when the operating member is operated to a cutting region, and a disengaging operation force from the planting clutch operating member. 2. The rice transplanter according to claim 1, further comprising a flexible means for preventing the operation of the planting clutch operating member during operation and permitting the planting clutch to remain engaged until the disengagement timing. 7. The operating member is configured to be swingable around a support shaft, and the operating member is provided on the basis of a distance from a position where the fertilizing clutch operating member is linked to the operating member to the support shaft. On the other hand, the distance from the position where the planting clutch operating member is linked to the support shaft is set to be short, and when the operating tool is operated to the cutting area, the cutting operation of the planting clutch is performed after the fertilizing clutch is released. 7. The rice transplanter according to claim 6, wherein the operation timing is set to allow. 8. The rice transplanter according to claim 1, wherein the fertilization transmission system includes a transmission shaft for transmitting power to a rear wheel, and a one-way clutch for transmitting power from the transmission shaft to a fertilization clutch. 9. An ascending area in which the operating tool raises the seedling planting apparatus, a neutral area in which the raising and lowering of the seedling planting apparatus is stopped, a descending area in which the seedling planting apparatus is lowered, and the planting. It is configured to be freely operable with a clutch and an entry area for performing the entry operation of the fertilizer application clutch, and an operation area other than the disengagement area is set in the disengagement area, and the vehicle travels in a state where the operation tool is set in the entry area. 2. The rice transplanter according to claim 1, further comprising forcible ascending means for setting the operating tool to an ascending area when an operation of moving the body backward is performed.