JP2002101713A - Implement for paddy field - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arrange both a fertilizing specification and a standard specification while maintaining a planting clutch in a excellently operable state by a lifting and lowering lever, making parts interchangeable and reducing a cost. SOLUTION: A first member 59 for a fertilizing clutch operation is pivotally connected to the bottom end of a connection rod 61 linked to the lifting and lowering lever 29. A spring 65 for urging the first member 59 in the direction to disengage a fertilizing clutch 62 for interrupting a traveling power to a fertilizing apparatus 14 is arranged. A fertilizing specification functioning in such a way that the fertilizing clutch 62 is engaged when the lifting and lowering lever 29 is in a planting position and the fertilizing clutch 62 is disengaged when the lifting and lowering lever 29 is in a position except the planting position and a standard specification omitting the first member 59 and the spring 65 and equipping a second member 60 part for a planting clutch operation with a coil spring 91 for urging the connection rod 61 to the planting disengaging part end at a long hole 39b of an operation plate are changeably made.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paddy field working machine such as a riding type rice transplanter or a riding type direct sowing machine, which drives up and down a working device such as a seedling planting device provided in the body and transmits power to the working device. For the configuration of the lifting lever that operates the work clutch to perform, and the configuration of the automatic lifting drive of the working device, specifically, the first specification state equipped with a supply device such as a fertilizer device,
The present invention relates to a technology for rationally configuring a second specification state not equipped with common components by increasing the number of common parts.

[0002]

2. Description of the Related Art A work clutch for driving and stopping a work device and a lifting lever for raising and lowering the work device are provided. The work clutch is disengaged to raise the work device. Neutral position to stop the elevating drive of the device, descent position to disengage the work clutch and lower the work device, and drive the work device up and down so that the work clutch is engaged and the work device is maintained at the set height from the rice field surface An example of a paddy working machine that is configured to be able to move the lifting lever to each position of
Japanese Patent Application No. 2000-51313 filed earlier has been proposed.

[0003] This is because not only the raising and lowering of the seedling planting device but also the raising and lowering of the seedling planting device is performed by operating the raising / lowering lever.
The on / off operation of the planting clutch and the on / off operation of the fertilizing clutch are configured so as to be able to be linked. In this proposed technology, the link rod (reference numeral 61) linked to the lifting lever (reference numeral 29) is inflexibly connected to the first link member (reference numeral 59) for operating the fertilizing clutch using a round hole, The connection with the second linking member (reference numeral 60) for operating the planting clutch is flexibly connected using a long hole, so that the supply of fertilizer fed from a relatively high position is stopped before the disengaging operation of the planting clutch. By doing so, it is devised that the fertilizer and the seedling planting device can be stopped substantially at the same time without wastefully dispersing the fertilizer on the field.

[0004]

The countermeasure technique is a rice transplanter with a fertilizer, that is, a fertilizer application. Therefore, in order to prepare a model of a standard specification not equipped with a fertilizer application device, the fertilizer device and its associated mechanisms and components, such as a fertilizer clutch and its operation system, are eliminated. Thus, in the rice transplanter of the proposed technique, the first linkage member (reference numeral 59) for operating the fertilizer clutch and the operation of the planting clutch are operated with respect to the single linkage rod (reference numeral 61) which is flexibly linked to the elevating lever. And a second linking member (reference numeral 60) for the fertilizer application (reference numeral 62) and a first linking member (reference numeral 5).
9), the link rod (reference numeral 63), the spring (reference numeral 65) and the like may be removed.

However, in the case of the standard rice transplanter in which the fertilizer application clutch is omitted as described above, in some cases, the on / off operation of the planting clutch by operating the elevating lever may not function as expected. That is, as will be described in detail in the embodiment section, it may be unclear whether the planting clutch is engaged or disengaged. After that state, the lifting lever is manually operated to operate the planting clutch. Even if the planting clutch was moved to the engagement position again, there was a problem that the planting clutch could not be engaged.

An object of the present invention is to devise an operation system of a lifting lever, a planting clutch, and a fertilizing clutch so that a good operating condition of the planting clutch by the lifting lever in the standard specification can be minimized by using a special mechanism. It is possible to provide a lineup of fertilizer application specifications and standard specifications while achieving commonality of parts and cost reduction by providing them without the need for installation.

[0007]

Means for Solving the Problems [Configuration and Function] Claim 1
Is provided with a work clutch for controlling the driving and stopping of the working device, and an elevating lever for controlling the lifting and lowering of the working device, a lifting position for disengaging the working clutch and raising the working device, and a working device for disengaging the working clutch. A neutral position for stopping the vertical drive, a lowering position for disengaging the work clutch and lowering the work device, and a vertical position for driving the work device so that the work device is maintained at a set height from the rice field with the work clutch engaged. In a paddy field working machine in which a lifting lever is configured to be movable to each position of a working position, an elongated hole formed in an operation plate interlocked with the lifting lever and one end of a link rod are flexibly connected, and , The second for working clutch on / off
A second elastic mechanism for urging the second linking member in the direction of disengaging the work clutch is provided while flexibly connecting the long hole formed in the linking member and the other end of the linking rod, and the elevating lever is moved to a position other than the working position. The work clutch is configured to be disengaged when in the position, and a supply device that acts on a field to be operated by the work device, and a supply clutch that is capable of intermittently connecting the power of the traveling system to the supply device. A first resilient mechanism for non-flexibly connecting the first coupling member for supplying and disengaging the supply clutch and the other end of the coupling rod, and for urging the first coupling member in a direction in which the supply clutch is disengaged; hand,
A first specification state in which the supply clutch is engaged when the elevating lever is in the working position, and the supply clutch is disengaged when the elevating lever is in a position other than the working position; a first linking member; Omit the elastic mechanism,
Further, it is characterized in that it is configured to be able to switch between a second specification state in which an urging means for urging the linking rod toward the work clutch disengagement side end of the long hole of the operation plate is provided.

According to the first aspect of the present invention, as will be described in detail in the embodiment, in the first specification state such as the fertilization specification, the first linking member is urged in the direction in which the supply clutch is disengaged. The role of the first elastic mechanism, that is, the role of urging the linking rod in the direction of disengaging the stud clutch with respect to the elevating lever, can be exerted by the urging means in the second specification state such as the standard specification. Become. That is, the first
By omitting the supply clutch and its operation system in the specification state and providing the urging means, it is possible to configure the second specification in a state where the on / off operation of the planting clutch can be performed as expected by the elevating lever. became.

According to a second aspect of the present invention, in the first aspect, the urging means is constituted by a spring for urging the linking rod to the work clutch disengagement side end of the long hole of the second linking member. It is a feature.

According to the second aspect of the present invention, the urging means for obtaining the above-described operation according to the first aspect of the present invention is arranged in proximity to the first linking member which is a component omitted in the second specification. Since the spring is provided at the linking member, the urging means can be configured with a simple structure and the number of parts is reduced, and the urging means is also present at a portion to be remodeled when the second specification is created. It is also preferable that the number of locations to be remodeled does not increase.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [1] As shown in FIG. 1, an engine 3 and a driving unit 4 are arranged on a body supported by a front wheel 1 and a rear wheel 2 which can be steered right and left. A fertilizer application device 14 is provided at a rear portion of the unit 4, and a seedling planting device 6 is connected to a rear portion of the body via a parallel quadruple link mechanism 5 so as to be able to move up and down, and a hydraulic cylinder that drives the link mechanism 5 to move up and down 7 is provided to constitute a riding type rice transplanter which is an example of a paddy field working machine.

As shown in FIGS. 1, 2, and 3, a feed case 20 is connected to the left and right centers of a horizontal frame 22 having a square pipe shape. 20 is rotatably supported, and a plurality of planting transmission cases 9 are connected to the horizontal frame 22 rearward. A rotating case 10 rotatably driven at the rear portion of the planting transmission case 9, a pair of planting claws 11 supported by the rotating case 10 are provided, and a seedling rest 8 driven reciprocally by a predetermined stroke is provided. One center float 12 at the lower left and right center of the seedling planting device 6,
The seedling planting device 6 is provided with two side floats 13 on the right and left lower sides of the seedling planting device 6.
With the above-described configuration, the seedling rest 8 is alternately taken out from the lower part of the seedling rest 8 by the rotation of the rotating case 10 and is planted on the rice field G by the rotation of the rotating case 10 while the seedling rest 8 is driven in the reciprocating sideways manner. ing.

As shown in FIGS. 2 and 3, the link mechanism 5
The seedling planting device 6 is rotatably supported left and right around the front-rear axis P1 at the lower rear end, and a motor 34 for rolling the seedling planting device 6 with respect to the body as shown in FIG. The seedling planting device 6 is provided with a horizontal sensor (not shown) that is provided at the upper rear end of the link mechanism 5 and detects the inclination angle of the seedling planting device 6 in the left-right direction with respect to the horizontal plane. Thereby, even if the body is tilted left and right, the seedling planting apparatus 6 is automatically driven by the motor 34 based on the detection value of the horizontal sensor (not shown) so that the seedling planting apparatus 6 is parallel to the horizontal plane. The automatic rolling control for performing the rolling operation is performed as described later.

As shown in FIG. 1 and FIG.
Is provided with a horizontally long fertilizer storage hopper 15 and a feeding part 16 connected to a lower part of the fertilizer storage hopper 15, and a groove generator 17 supported by the center float 12 and the side float 13 and a feeding part 16 are connected to a hose. 18 are connected. Thereby, a groove is formed on the rice field G by the groove cultivator 17 with the planting of the seedling, and the fertilizer fed out from the fertilizer storage hopper 15 through the feeding part 16 is
It is supplied to the groove of the rice field G via the hose 18 and the groove generator 17.

[2] As shown in FIG. 1, the right and left markers 23 for forming an index of the next planting step on the rice field G during traveling in one planting step are attached to the seedling planting apparatus 6. The right and left markers 23 will be described next. The right and left markers 23 have the tip
A spring (not shown) is supported so as to swing over a downward contact position (state where an index is drawn on the rice field G as the vehicle travels) and an upward storage position where the tip is raised from the rice field G. ) To the ground position.

As shown in FIGS. 5A and 6B and FIG.
Under the driver's seat 19 (see FIG. 1) in the driver 4, right and left operation arms 47 are swingably supported around the horizontal axis P5, and the right and left markers 23 and the right and left operations are performed. The arm 47 is linked with the wire 24, and as shown in FIGS. 5 (a) to 5 (b) and FIG. 6, when the seedling planting device 6 is largely driven up, the arm of the link mechanism 5 is moved. 5a, the right and left operation arms 47 are operated, the wire 24 is pulled, and the right and left markers 23 are operated to the storage positions.

As shown in FIGS. 5A and 6B and FIG.
The right and left holding arms 27 are swingably supported around the vertical axis P6, and the right and left holding arms 27 are urged by springs 28 toward the engagement sides with the right and left operation arms 47. . The operation member 76 is slidable up and down in FIG.
The operating member 76 is provided with a pair of operating portions 76a that contact the right and left holding arms 27.
Are provided with a pair of springs 69 for urging the operation member 76 at the position shown in FIG. As a result, as shown in FIGS. 5B and 6, the operation member 76 is moved to the state shown in FIG. 6 in a state where the right and left holding arms 27 are engaged with the right and left operation arms 47.
, The engagement of the right or left holding arm 27 is released by the operating section 76a of the operating member 76.

As described above, when the seedling planting device 6 is largely raised, the right and left operating arms 47 are operated, and the right and left markers 23 are operated to the storage positions, the right and left holding arms are moved. 27 engages with the right and left operation arms 47 and the right and left operation arms 47 (the right and left markers 2).
3) is held in the storage position. Next, even if the seedling planting apparatus 6 is lowered to the rice field surface G, the right and left holding arms 27 use the right and left operation arms 47 (the right and left markers 23).
Is held at the storage position, but when the engagement of the right or left holding arm 27 is released as described above, the right or left marker 23 is moved from the storage position to the ground position by a spring (not shown). Is operated.

[3] Next, the support structure of the center float 12 and the side float 13 will be described. As shown in FIGS. 2 and 3, the support shaft 30 is rotatably supported in parallel with the horizontal frame 22 over the support plates 25 (see FIG. 1) at both left and right ends of the horizontal frame 22 and the lower part of the planting transmission case 9. Two support arms 31 are extended from a portion of the support shaft 30 near the planting transmission case 9, and the center float 12 extends around the horizontal axis P 2 of the support arm 31.
The rear part of the side float 13 is supported so as to be vertically swingable.

As shown in FIGS. 2, 3, and 4, a U-shaped link member 35 in a plan view is supported at the center of the front of the center float 12 and the side float 13 in the left and right directions so as to be vertically swingable. A U-shaped link member 37 is supported on the front surface of the frame 22 in a vertically swingable manner, and the ends of the link members 35 and 37 are swingably connected. Thus, the center floats 12 and the side floats 13 are supported by the link mechanisms 35 and 37 so that the front portions of the center floats 12 and the side floats 13 can be swung up and down around the horizontal axis P2 while being guided so as not to swing right and left. Is done.

As shown in FIGS. 2, 3, and 4, an implantation depth lever 32 is connected to the support shaft 30, and the angle of the support shaft 30 and the support arm 31 is changed by the implantation depth lever 32. As will be described later, the position of the horizontal axis P2 is changed up and down to change the planting depth of the seedling.
The planting depth of the seedlings is set by engaging and fixing the planting depth lever 32 to the lever guide 33 connected to. A U-shaped frame 43 in a plan view is supported swingably up and down around a horizontal axis P3 of a bracket 41 fixed to the horizontal frame 22, and the planting depth lever 32 and the frame 43 are supported.
The connecting rod 26 is connected to the end of the frame 43 so that the posture of the frame 43 is determined by the planting depth lever 32.

As shown in FIGS. 2, 3 and 4, a U-shaped frame 40 is supported around the horizontal axis P4 at the front of the center float 12 so as to be swingable back and forth, and is fixed to the frame 43. The pin 44 is inserted into the long hole 40 a of the frame 40, and the spring 4 extends over the upper part of the frame 40 and the pin 44.
The center float 12 is urged downward by a spring 45. As shown in FIGS. 3 and 4, the inner 21 a of the wire 21 is connected to the pin 44, and the outer 21 b of the wire 21 is connected to the frame 40.

As a result, when the seedling planting apparatus 6 moves up and down with respect to the center float 12 that follows the ground surface G by touching the ground surface, the center float 12 moves vertically with respect to the seedling planting apparatus 6. As a result, the outer 21b of the wire 21 moves vertically in relation to the inner 21a (connected to the pin 44) of the wire 21. 2
The other end of the inner 21a is pushed and pulled.

[4] Next, the structure near the raising / lowering lever 29 for driving the raising and lowering of the seedling planting apparatus 6 will be described. FIG.
As shown in FIG. 9, the lifting lever 29 is disposed on the right side of the driver's seat 19, and as shown in FIGS. 9 and 11, a support shaft 38 is provided around a horizontal axis P 7 of a support member 36 fixed to the body.
Is rotatably supported, and an operation plate 39 is attached to an end of the support shaft 38.
Is fixed, and the axis P of the bracket 39a of the operation plate 39 is fixed.
A support shaft 42 is rotatably supported around 8 and the elevating lever 29 is fixed to the support shaft 42. An arm 50 is fixed to an intermediate portion of the support shaft 38, and a spring cylinder 51 urged to the extension side is connected between the fixed portion of the body and the arm 50, and the lifting lever 29 is urged to an ascending position described later. Have been.

As shown in FIGS. 9, 10, 11, and 12, a support shaft 48 is rotatably supported around a horizontal axis P9 of the support member 36, and a balance arm 49 is fixed to an end of the support shaft 48. The inner end 21a of the wire 21 is connected to the lower end of the balance arm 49. A bolt 52 is rotatably supported at the upper end of the balance arm 49, and a ball 53 is fixed to the tip of the bolt 52. The ball 53 contacts a contact portion 50a extending downward from the arm 50. It is configured as follows.

As shown in FIGS. 7 and 8, a control valve 55 for supplying and discharging hydraulic oil to and from the hydraulic cylinder 7 (see FIG. 1) is provided at the front of the body, and a spool 55a of the control valve 55 is provided with a spring 55b. Therefore, the spool 55a of the control valve 55 is pushed rightward in FIG. 8 by pushing the spool 55a of the control valve 55 rightward in FIG. A balance arm 56 for operation (a contraction side of the hydraulic cylinder 7 and a rising side of the seedling planting device 6) is provided. 7 to 1
As shown in FIG. 2, an arm 54 is fixed to the end of the support shaft 48, and a link rod 57 is connected between the balance arm 56 and the arm 54.

As shown in FIG. 7 and FIG.
8 around the first linking member 59 and the second
The link members 60 are swingably supported independently of each other, and a link rod 61 is bridged between the long hole 39 b of the operation plate 39 and the first link member 59. Fertilizing clutch 6 for transmitting power to power supply unit 16 (see FIG. 1) and for interrupting power transmission
The link rod 63 is connected across the first link member 2 and the first link member 59, and a spring 65 that urges the fertilizing clutch 62 to a disengaged position (transmission shutoff operation) is attached to the first link member 59. .

The seedling planting apparatus 6 (see FIG. 1) is provided with a planting clutch 64 for transmitting and interrupting power transmission, and the planting clutch 64 is moved to an on position (transmission operation) and a disengagement position (transmission interruption operation). Swing type crank arm 66 to be operated
And a link rod 67 is connected to the second link member 60, and the link rod 61 is inserted into the long hole 60 a of the second link member 60.
The spring 68 that urges the planting clutch 64 to the disengaged position is attached to the second linking member 60.

As shown in FIGS.
A guide plate 70 is disposed above the guide plate 9, and a lever guide 71 of the elevating lever 29 is opened in the guide plate 70. The ascending position, the descending position, the neutral position, and the planting position are set in the lever guide 71, and the planting is performed. A right marker position and a left marker position are set to the left and right of the position. As shown in FIGS. 9 and 11, the lifting lever 29 is supported on the operation plate 39 by the support shaft 42 so as to be operable to the left and right. As shown in FIG. 13, the lever in the raised position, the neutral position, and the lowered position. In the portion of the guide 71, the lever guide 71 is set to have a wide width so that the elevating lever 29 can be operated over one lateral side and the other lateral side of the lever guide 71.

As shown in FIG. 13, on one lateral side of the lever guide 71 (the side opposite to the driver's seat 19 in the lever guide 71), the first guide is linear over the lowering position, the neutral position and the lowering position. A portion 71a is formed, and a convex portion 71b is formed between the lowered position and the planting position. On the other lateral side of the lever guide 71 (the driver's seat 19 side of the lever guide 71), a linear second guide portion 71c is formed over the ascending position, the neutral position, and the descending position. An inclined guide portion 71d extending left and right from the 2 guide portion 71c is formed, and a planting position at the center in the left and right direction,
The right marker position on the right and the left marker position on the left are arranged.

As shown in FIG. 9 and FIG.
One end of the leaf spring 72 is fixed to the mounting portion 70a, and the leaf spring 72 enters the neutral position and the raised position from the second guide portion 71c, and the tip of the leaf spring 72 is inserted into the guide hole 70b of the guide plate 70. ing. Thereby, as shown in FIG. 13, the second guide portion 71 in the raised position, the neutral position, and the lowered position
The leaf spring 72 contacts the elevating lever 29 located on the c side,
The lift lever 29 is urged by the leaf spring 72 toward the first guide portion 71a in the raised position, the neutral position, and the lowered position.

As shown in FIG. 9 and FIG.
, A limit switch 73 is fixed. Thereby, the lifting lever 29 is moved to the first and second guide portions 7 in the raised position.
The first and second guide portions 71 at the neutral position on the 1a, 71b side
a, 71b, the leaf spring 72 contacts the limit switch 73, the limit switch 73 is operated to the ON position, and the elevating lever 29 is moved to the first guide portion 71 in the lowered position.
When operated to the side a, the leaf spring 72 is
And the limit switch 73 is operated to the cut position. When the elevating lever 29 is operated toward the second guide portion 71c at the lowered position, the leaf spring 72 contacts the limit switch 73, the limit switch 73 is operated to the on position, and the elevating lever 29 is moved to the planting position, right and left. When operated to the marker position, the leaf spring 72 is separated from the limit switch 73, and the limit switch 73 is operated to the cut position.

As will be described later, when the limit switch 73 is operated to the cut position, the motor 34 causes the seedling planting device 6 to become parallel to the horizontal plane based on the detection value of the horizontal sensor (not shown). Automatic rolling control in which the planting device 6 is automatically rolled is performed (see [1] above), and when the limit switch 73 is operated to the ON position, the motor 34 is not performed and automatic rotation control is not performed.
Stops.

As shown in FIG. 9 and FIG.
Are provided with three concave portions 39e and one convex portion 39d at the lower part of the support plate 36, and the holding arm 74 is swingably supported around the horizontal axis P10 of the support member 36.
A spring 75 for urging the ninth side is provided. As a result, the roller 74a of the holding arm 74 enters the concave portion 39e of the operation plate 39, whereby the lifting lever 29 is held at the neutral position, the lowering position, the planting position, and the right and left marker positions. The urging force and the roller 74 a of the holding arm 74 are
By contacting with d, the elevating lever 29 is held at the ascending position.

[5] Next, the case where the elevating lever 29 is operated to the neutral position and the lowered position will be described. FIG.
The states shown in FIGS. 8 and 9 are states in which the elevating lever 29 is held at the neutral position by the holding arm 74.
2 moves the lifting lever 29 to the first guide portion 71a in the neutral position.
Side (see FIG. 13). In this state, the bolt 52 and the ball 53 of the balance arm 49 contact the contact portion 50a of the arm 50, the balance arm 49 and the control valve 55 are held at the neutral position, and the hydraulic cylinder 7 is stopped. In this case, if the seedling planting device 6 is located above the rice field G, the center float 12 swings downward, and the inner 21a of the wire 21 is attached to the balance arm 49.
The balance arm 49 attempts to swing counterclockwise in FIG.
The bolt 52 and the ball 53 of the arm 50
In contact with Oa, the balance arm 49 and the control valve 55 are held at the neutral position.

As shown in FIGS. 7, 8, and 13, the planting clutch 64 and the fertilizing clutch 62 are operated to the disengaged position while the elevating lever 29 is operated toward the first guide portion 71a in the neutral position. The seedling planting device 6 and the fertilizer application device 14 (delivery unit 16) are stopped, and as shown in FIG.
By (2), the limit switch 73 is operated to the ON position, and the motor 34 is stopped without performing the automatic rolling control.

The lifting lever 29 is moved to the first guide portion 7 in the neutral position.
When the first guide portion 71a is moved downward from the side 1a (see FIG. 13), the contact portion 50a of the arm 50 separates from the bolt 52 and the ball 53 of the balance arm 49 to the left of FIG. When the seedling planting device 6 is positioned above the rice field surface G as described above, the center float 12 swings downward, and the inner 21a of the wire 21 is moved to the balance arm 49.
Side, the balance arm 49 swings counterclockwise in FIG. 8, and the control valve 55 is operated to the lowered position. As a result, the hydraulic cylinder 7 is extended and the seedling plant 6
Descends.

The lifting lever 29 is moved to the first guide portion 7 in the neutral position.
Even if the operation is performed from the 1a side to the first guide portion 71a side at the lowered position (see FIG. 13), the planting clutch 64 and the fertilizing clutch 62 are still left at the disengaged position due to the accommodating action of the long hole 39b of the operation plate 39. Is not operated in the entry position. When the raising / lowering lever 29 is operated from the first guide portion 71a at the neutral position to the first guide portion 71a at the lower position (see FIG. 13), the leaf spring 72 separates from the limit switch 73 and the horizontal sensor (not shown). Based on the detection value of (1), the motor 34 starts the automatic rolling control in which the seedling planting device 6 is automatically rolled so that the seedling planting device 6 is parallel to the horizontal plane.

In the state where the automatic rolling control is performed as described above, the seedling plant 6 descends and the center float 1
When the ground 2 touches the rice field G, the center float 12 is lifted.
a is pulled toward the center float 12, the balance arm 49 swings clockwise in FIG. 8, the control valve 55 is operated to the neutral position, and the hydraulic cylinder 7 stops.

Thereafter, when the seedling planting apparatus 6 moves up and down with respect to the center float 12 that follows the ground surface G by touching the ground, the center float 12 moves vertically with respect to the seedling planting apparatus 6. The wire 21 swings up and down around P2, and the inner 21a of the wire 21 is pushed and pulled. Accordingly, the control valve 55 is operated to the raised and lowered positions, the hydraulic cylinder 7 is extended and retracted, and the seedling planting device 6 is automatically moved so that the seedling planting device 6 is maintained at the set height from the rice field G. (Up / down control).

[6] Next, a case where the lifting lever 29 is operated to the planting position will be described. When the elevating lever 29 is operated from the neutral position of the first guide portion 71a to the planting position (see FIG. 13), the elevating lever 29 is moved from the neutral position of the first guide portion 71a to the lower position of the first guide portion 71a. , And is moved to the planting position bypassing the convex portion 71b. When the raising / lowering lever 29 is operated to the planting position, the leaf spring 72 is separated from the limit switch 73, and the automatic rolling control is started.

When the raising / lowering lever 29 is moved to the planting position (see FIG. 13), the link rod 61 is operated downward in FIG. 8 by the operation plate 39, and the fertilizer is applied via the first link member 59 and the link rod 63. The clutch 62 is operated to the engaged position, and the fertilizer starts to be fed from the feeding section 16. Along with this, due to the accommodating action of the long hole 60a of the second linking member 60, the planting clutch 64 is moved through the second linking member 60 and the linking rod 67 slightly after the fertilizer application clutch 62 is operated to the entry position. By operating to the entry position, seedling planting by the seedling planting apparatus 6 is started. The reason why the fertilizer application clutch 62 is operated to the entry position slightly earlier than the planting clutch 64 in this way is that the feeding part 16 is at a higher position from the rice field surface G as shown in FIG. Since it takes a little time to reach the rice field G from, the fertilizer is supplied to the rice field G without delay when the seedling is planted by the seedling planting device 6 (planting claw 11). is there.

When the raising / lowering lever 29 is operated to the planting position as described above, the planting of the seedling by the seedling planting device 6 and the supply of the fertilizer to the rice field G by the fertilizing device 14 are performed. The seedling planting device 6 is automatically rolled by the motor 34 so that the planting device 6 is parallel to the horizontal plane, and the seedling planting device 6 is maintained at the set height from the rice field G by the automatic elevation control. Then, the seedling planting device 6 is automatically driven up and down to maintain the planting depth of the seedling at the set value.

As shown in FIG. 13, when the lift lever 29 is being operated toward the first guide portion 71a in the lift position and the neutral position, the lift lever 29 is moved against the leaf spring 72 in the lift position and the neutral position. Is operated to the second guide portion 71c side, the elevating lever 29 is moved from the second guide portion 71c side of the raised position and the neutral position along the second guide portion 71c to the convex portion 71b.
It is also possible to linearly operate the planting position without hitting.

As shown in FIG. 13 and FIG.
Limit switch 78 on bracket 77 fixed to 0
Is fixed, and a leaf spring 79 attached to the bracket 77 is provided.
Extend over the planting position, right and left marker positions. Thus, when the elevating lever 29 is operated to the planting position (right and left marker positions), the leaf spring 79 is pressed by the elevating lever 29, and the limit switch 78 is operated to the ON position, and the instrument panel 80 (see FIG. 1). ) Turns on a display lamp (not shown).

When changing the planting depth of the seedling, the angle of the support shaft 30 and the support arm 31 is changed by the planting depth lever 32, as described in the above item [3], as shown in FIGS. To change the position of the horizontal axis P2 up and down.
The pin 44 side of the frame 43 is swung up and down in the same direction as the horizontal axis P2 via the linkage rod 26 by the planting depth lever 32, and the positions of the frame 40 and the wire 21 are also in the same direction as the horizontal axis P2. Changed up and down. As described above, by changing the positions of the front part and the rear part of the center float 12 and the side floats 13 by the planting depth lever 32 so as to be substantially parallel to the seedling planting device 6, the seedling planting device 6 is changed. Is changed from the rice field G at which is maintained (planting depth of seedlings).

As described in the preceding paragraph [2], as shown in FIGS. 5 (b) and 6, when the seedling planting device 6 is largely raised, the right and left holding arms 27 are moved to the right and left operating arms. The right and left markers 23 are held in the storage positions by engaging with the right and left holding arms 27 even if the seedling planting device 6 descends to the rice field surface G. The operation arm 47 (the right and left markers 23) is held at the storage position.

When the elevating lever 29 is operated to the planting position as shown in FIGS. 5B and 6, the lower end 29a of the elevating lever 29 is engaged with the operating member 76. Thus, when the elevating lever 29 is operated from the planting position to the right marker position (left marker position) (see FIG. 13), the operating member 76 is operated by the elevating lever 29 upward (downward in FIG. 6) in FIG. The engagement of the right holding arm 27 (left holding arm 27) is released by the operation unit 76a of the member 76, and the right marker 23 (left marker 23) is operated from the storage position to the ground position.

[7] Next, the case where the lifting lever 29 is operated to the raised position will be described. In a state where the elevating lever 29 is operated to the planting position (see FIG. 13), when the elevating lever 29 is operated to the elevating position, the elevating lever 2
9 is passed from the planting position between the convex portion 71b and the second guide portion 71c so that the leaf spring 72 is pushed away, and along the second guide portion 71c (the second guide portion 71c in the lowered position and the neutral position). (Along the side), the second guide 7 in a linearly raised position
1c side can be operated. In this case, when the lift lever 29 reaches the second guide portion 71c at the lower position, the leaf spring 72 is pressed by the lift lever 29, and the limit switch 73 is operated to the ON position, the automatic rolling control and the motor 34 are started. Stop.

When the lifting lever 29 is moved to the raised position as described above, the arm 50 swings counterclockwise in FIG. 8 and the balance arm 49 is moved clockwise in FIG. , The control valve 55 is operated to the raised position, the hydraulic cylinder 7 is contracted, and the seedling planting device 6 is raised. In this case, when the raising / lowering lever 29 is operated from the planting position to the second guide portion 71c at the lowering position (see FIG. 13), the fertilizer application clutch 62 is moved by the spring 65 via the first linking member 59 and the linking rod 63. The fertilizer device 14 (the feeding unit 16) is operated at the cutting position.
Stops. At the same time, the lifting lever 29 is
9 (see FIG. 13), the limit switch 78 is operated to the cut position, and the indicator lamp (not shown) provided on the instrument panel 80 (see FIG. 1) turns off.

In the planting clutch 64, the rotating case 10 (see FIG. 1) does not assume a predetermined posture substantially parallel to the rice field surface G (the posture in which both the planting claws 11 of the rotating case 10 are located above the rice field surface G). And the planting clutch 64 is configured not to be operated to the disengagement position. Therefore, even if the first linking member 59 swings clockwise in FIG. After the rotating case 10 (see FIG. 1) is brought into a predetermined position substantially parallel to the rice field surface G by the flexibility of the long holes 60a of the 60, the planting clutch 64 is operated by the springs 68 and 69 to the disengagement position, and the seedling is planted. The attachment device 6 stops.

As shown in FIGS. 7, 8, and 9, the link rod 81 extends between the long hole 39c of the operation plate 39 and the link mechanism 5.
Has been erected. Thereby, the long hole 39 of the operation plate 39
Although the lifting and lowering of the link mechanism 5 does not affect the lifting and lowering lever 29 due to the accommodating action of c, the seedling transplanter ascends while the lifting and lowering lever 29 is operated to the raised position as described above. 6 (link mechanism 5) reaches the upper limit position, whereby the elevating lever 29 is moved to the neutral position,
Lowering position, planting position, operation plate 39 of right link rod 81
The lifting lever 29 is operated from the ascending position to the neutral position by the pushing action, and the seedling planting device 6 (the link mechanism 5 and the hydraulic cylinder 7) stops at the upper limit position.

For traveling, a hydrostatic continuously variable transmission (not shown) is provided on the forward side and the reverse side that can continuously change the speed. As shown in FIG. 1, the hydrostatic continuously variable transmission is provided. A speed change lever 82 is provided for operating a gear (not shown) forward and backward. As shown in FIGS. 8 and 9, a wire 83 is connected to the holding arm 74, and when the shift lever 82 is operated backward, the wire 83 is connected to the shift lever 8.
The shift lever 82 and the wire 8
3 are linked.

As a result, the lifting lever 29 is moved to the neutral position,
When the shift lever 82 is operated in the reverse direction in the operation of the lowering position, the planting position, and the right and left marker positions, the holding arm 74 swings clockwise in FIG. The operation roller 39 of the operation plate 39
The lift lever 29 is operated by the spring cylinder 51 to the raised position.

[8] Next, the structure near the sensitivity setting lever 46 for setting the control sensitivity of the automatic elevating control described in the above items [5] and [6] will be described. As shown in FIGS. 8, 10, and 11, the sensitivity setting lever 46 is inserted into the vertically long hole 90a of the support plate 90 and the vertically long hole 84a of the fixed bracket 84. The sensitivity setting lever 46 is inserted into the opened lever guide 85 (FIG. 13).
), And a spring 86 for urging the end of the sensitivity setting lever 46 downward is provided. As shown in FIG. 13, a plurality of recesses 85a are formed in the lever guide 85,
The sensitivity setting lever 46 is moved to the concave portion 85 of the lever guide 85 by the spring 86 using the long hole 84 a of the bracket 84 as a fulcrum.
When the sensitivity setting lever 46 enters the recess 85a of the lever guide 85, the attitude of the sensitivity setting lever 46 is set.

As shown in FIGS. 8, 10 and 11, a positioning member 87 is fixed to the sensitivity setting lever 46, and
8 is fitted to the sensitivity setting lever 46 so as to be relatively rotatable,
The outer 21b of the wire 21 is attached to the support member 88, and a spring 89 for urging the support member 88 against the sensitivity setting lever 46 clockwise in FIG. . Thereby, the spring 89
When the support member 88 comes into contact with the bent portion 87a of the positioning member 87 by the urging force, the posture of the support member 88 with respect to the sensitivity setting lever 46 is set.

With the above configuration, when the sensitivity setting lever 46 is operated to the insensitive side to be held in the concave portion 85a of the lever guide 85, the length of the inner 21a of the wire 21 on the balance arm 49 side as shown in FIG. Becomes shorter,
As shown in FIG. 3, the length of the inner 21a of the wire 21 protruding on the center float 12 side becomes longer. Accordingly, the center float 12 is stabilized in the upward posture (neutral state) in the state of the automatic lifting control in which the lifting lever 29 is moved to the lowering and planting position, so that the contact area of the center float 12 to the rice field surface G is small. Become a spring 4
The urging force for urging the center float 12 downward is increased. Therefore, the center float 12 is in a state where the mud on the rice field G is actively crushed, and the sensitivity of the center float 12 to follow the ground to the rice field G (the control sensitivity of the automatic elevation control) becomes insensitive. The state is rice field G
Suitable when the mud is hard.

When the sensitivity setting lever 46 is operated to the sensitive side and held in the concave portion 85a of the lever guide 85, the length of the inner 21a of the wire 21 protruding on the balance arm 49 becomes longer as shown in FIG. As shown in FIG. 3, the inner float
The length of 1a is shortened. Thereby, in the state of the automatic lifting control in which the lifting / lowering lever 29 is moved to the lowering and planting position, the center float 12 is stabilized in the downward posture (neutral state).
The contact area of the spring 45 increases, and the urging force of the spring 45 urging the center float 12 downward decreases. Therefore,
The center float 12 reacts sensitively to the irregularities on the surface G,
The ground follow sensitivity of the center float 12 to the rice field surface G (the control sensitivity of the automatic elevation control) becomes sensitive, and this state is suitable when the mud on the rice field G is soft.

In the structure shown in FIGS. 10 and 11, for example, if the center float 12 rides on a large block of mud and the center float 12 swings largely upward, the inner 21a of the wire 21 is moved to the center float 12 side. It is greatly operated. In this state, the balance arm 49 and the control valve 55 (spool 55a) are first operated by pulling the inner 21a of the wire 21, as shown in FIGS. When 21a is pulled,
Since the balance arm 49 and the control valve 55 (spool 55a) are not operated beyond the raised position, the support member 88 swings counterclockwise in FIG. The outer 21b of FIG.
0 to the right of the paper surface of FIG.
The pulling operation of a is absorbed.

For example, assuming that the center float 12 enters the large concave portion and the center float 12 swings largely downward, the inner 21 a of the wire 21 is greatly pushed toward the balance arm 49. In such a state, as shown in FIGS. 8 and 10, the balance arm 49 and the control valve 55 (spool 55 a) are operated to the lowered position by first pressing the inner 21 a of the wire 21.
When the inner 21a of the wire 21 is further pushed, the balance arm 49 and the control valve 55 (spool 55a)
Is not operated beyond the lowered position, the inner 21a of the wire 21 is loosened on the balance arm 49 side, and the pushing operation of the inner 21a of the wire 21 is absorbed.

Next, the standard specifications without the fertilizer application device 14 will be described. As described above, for the fertilization specification having the fertilizer device (an example of the supply device) 14, the linkage operation structure of the lifting lever 29 and the planting clutch (an example of the work clutch) 64 in the standard specification without the fertilizer device 14 is provided. Is as follows: As shown in FIG. 15, in the standard specification, the fertilizer application clutch (an example of the supply clutch) 62,
Linking member 59, linking rod 63, and fertilizing clutch 62
(An example of a first elastic mechanism) 65 for urging the to the cutting position (transmission interruption operation) is omitted, and a helical spring (an example of an urging means) 91 is provided instead of them.

That is, as shown in FIGS. 16 and 17, the second
A helical spring 91 is externally mounted on the support shaft 58 sandwiched between the left and right plate surface portions 92 and 93 of the linking member 60, and one end of the helical spring 91 is attached to the inner surface of the connecting surface portion 94 of the second linking member 60. And the other end is a bent portion 61 at the lower end of the link rod 61.
Each of them is set to be applied to the lower side of a. That is, the linking rod 61 has its bent portion 61a
It is configured to be biased and maintained at the upper end of “a” and to have the function of the spring 65 acting on the first linking member 59 in the fertilization specification.

In the structure in which the planting clutch 64 and the elevating lever 29 are mechanically linked, the "descent" of the elevating lever 29 is performed.
Since the planting clutch 64 is turned on and off in the region, the operation plate 39 and the link rod 61 are flexibly connected via the long holes 39b, and the fertilizing clutch 64 is turned on before the planting clutch 64 is turned on. For this reason, in the fertilization specification, the spring 65 for the fertilization clutch pushes and urges the link rod 61 via the first linking member 59, whereby the bent portion 6 is pressed.
1a is biased and maintained at the upper end of the long hole 60a of the second linking member 60.

Therefore, if the first linking member 59 and the spring 65 are used in a state where the fertilizer applicator 14 does not have the standard specifications, the following inconvenience may occur. That is, in the planting operation state in which the elevating lever 29 is operated to the “planting” position, the planting clutch pin 95 may not be sufficiently pressed. For example, when the planting operation is interrupted by neutrally operating the shift lever 82,
In such a state, there has been a problem that the planting clutch 64 cannot be engaged when the raising / lowering lever 29 is operated to temporarily disengage the planting clutch 64 and then perform the clutch re-engaging operation. This is for the following reasons.

As shown in FIG. 18, when the elevating lever 29 is operated to the "planting" position, the support shaft 38, which is the swing fulcrum of the elevating lever 29, is substantially on the extension of the link rod 61 in the longitudinal direction. 18, the tangential direction of the long hole 39 b of the operation plate 39 and the longitudinal direction of the link rod 61 are substantially orthogonal to each other.
As shown by an imaginary line in FIG.
At the opposite end of 9b, a condition is provided that can be easily moved. In this case, the link rod 61 slightly moves back, and the second link member 60 slightly returns from the normal position where the planting clutch is engaged to the clutch disengagement side. There is a state in which the planting clutch 64 is not fully pressed (this state is presumed to be a half-clutch state in which it is not clear whether the planting clutch 64 is engaged or disengaged).

Then, as shown by an imaginary line in FIG. 18, a link (an example of a second elastic mechanism) 68 is used to
Is moved to the setting position (down position) by moving the up / down lever 29, and then moving the up / down lever 29 again to move the planting clutch. Even if it is operated to the entry position (planting position), if the linkage rod 61 is in the state shown by the imaginary line in FIG. 18, the planting clutch pin 95 cannot be pushed sufficiently, and in some cases the planting may be performed. There was a problem that the clutch 64 could not be engaged and operated.

The above-mentioned inconvenience is mainly due to the fact that the linking rod 61 to be positioned at the upper end of the elongated hole 39b of the operation plate 39 moves to the lower end of the elongated hole 39b. Therefore, in order to solve the inconvenience, it is preferable to prevent the lower end of the long hole 39b from moving, that is, to apply an urging force to move the link rod 61 upward to the operation plate 39. As one means for this purpose, in the present application, a helical spring 91 is provided to constantly push and push the link rod 61 from below, so that the above-mentioned problem does not occur and the operation of the planting clutch 64 can be performed as well as the fertilization specification. The situation has been realized.

That is, an operation structure related to the lifting lever 29,
In addition, as a result of familiarizing the operation structure for linking with the planting clutch 64 and studying and examining the movement in detail, the function of the first linking member 59 and the spring 65 in the fertilization specification was changed. A second winding in which an elongated hole 60a, which is unnecessary in the standard specification, is formed by only equipping one winding spring 91.
By using the linking member 60 as it is for the standard specification, it was possible to realize the common use of parts, and it was possible to obtain a cost reduction effect without reducing the function.
A rational rice transplanter capable of setting fertilizer specifications and standard specifications could be provided.

[Another Embodiment] Operation plate 39 and linkage rod 6
Alternatively, a tension spring may be provided across the first and second springs 1 to bias the upper end of the link rod 61 to the upper end position of the elongated hole 39b. The working device may be a sowing device or a direct sowing device,
The supplying device may be a device for spraying a chemical such as a herbicide or a device for applying a paste.

[0070]

According to the paddy field working machine of the first aspect, the first
The simple modification of omitting the supply clutch and its operation system in the specification state and providing an urging means instead,
The operation failure of the planting clutch in the specification state has been resolved, and the first specification with the supply device and the second specification without the supply device can be realized and lined up economically and rationally. .

In the paddy field working machine according to the second aspect, the effects of the first aspect are achieved, and the first specification and the second
There is an advantage that the number of parts to be remodeled at the time of specification switching with the specification is as small as possible, and that only one additional part is required.

[Brief description of the drawings]

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

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

FIG. 3 is a longitudinal sectional side view of the vicinity of a center float of the seedling planting device.

FIG. 4 is a front view showing the vicinity of a center float of the seedling planting device.

FIG. 5 is a side view of the vicinity of right and left operation arms (right and left markers) when the seedling planting device (link mechanism) is driven to move down and up.

FIG. 6 is a plan view showing the vicinity of an operation member, right and left holding arms, and right and left operation arms (right and left markers).

FIG. 7 is a side view of the vicinity of a lifting lever, a planting clutch and a fertilizing clutch.

FIG. 8 is a diagram showing a linked state of a lifting lever, a control valve, a planting clutch, and a fertilizing clutch.

FIG. 9 is a side view of the vicinity of a lifting lever

FIG. 10 is a side view showing a linked state of a lifting lever, a balance arm, and a sensitivity setting lever.

FIG. 11 is a cross-sectional plan view near the bases of the lifting lever and the sensitivity setting lever.

FIG. 12 is a cross-sectional plan view near the base of the lifting lever.

FIG. 13 is a plan view of a lever guide.

FIG. 14 is a front view of a front portion of the lever guide.

FIG. 15 is a side view of the vicinity of the lifting lever and the planting clutch in the standard specification.

FIG. 16 is a side view of the vicinity of the second link member in the standard specification.

FIG. 17 is a plan view showing the vicinity of a second link member in the standard specification.

FIG. 18 is an action diagram of a main part showing a principle of occurrence of a failure when a helical spring is not provided.

[Explanation of symbols]

 6 Working device 14 Supply device 29 Lifting lever 39 Operation plate 39b Slot 59 First linking member 60 Second linking member 60a Slot 61 Linking rod 62 Supply clutch 64 Working clutch 65 First elastic mechanism 68 Second elastic mechanism 91 Energizing means

Claims (2)

[Claims] 1. A work clutch for driving and stopping a work device, a lifting lever for lifting and lowering the work device, a lifting position for disengaging the work clutch and raising the work device, A neutral position for disengaging and stopping the elevation drive of the working device, a lowering position for disengaging the working clutch and lowering the working device, and maintaining the working device at a set height from the rice field surface with the working clutch engaged. A rice paddle working machine configured to be able to move the lifting lever to each position of a working position for driving the lifting device up and down, and formed on an operation plate interlocked with the lifting lever. The long hole and one end of the link rod are flexibly connected, and the long hole formed in the second link member for engaging and disengaging the work clutch is flexibly connected with the other end of the link rod. And a second elastic mechanism for urging the second linking member in a work clutch disengagement direction is provided so that the work clutch is disengaged when the elevating lever is at a position other than the work position, A supply device acting on a field to be actuated by the working device, and a supply clutch capable of intermittently connecting the power of a traveling system to the supply device; a first coupling member for turning on and off the supply clutch; A first elastic mechanism for inflexibly connecting the other end of the link rod and urging the first link member in a direction in which the supply clutch is disengaged is provided, and the lifting lever is at the working position. A first specification state in which the supply clutch is engaged, and the supply clutch is disengaged when the elevating lever is at a position other than the working position; and The second specification state is switched between a state in which one linking member and the first elastic mechanism are omitted, and a biasing means for biasing the linking rod toward the work clutch disengagement end of the elongated hole of the operation plate is switched. Paddy working machine that is configured to be possible. 2. The paddy field working machine according to claim 1, wherein said urging means comprises a spring for urging said linking rod to a work clutch disengagement side end of a long hole of said second linking member.