JPH09201123A - Sulky type rice plant transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To exactly tune the tentative stopping motion of a planting section-lifting lever to the release motion of a planting clutch. SOLUTION: In a sulky type rice plant transplanter A in which a planting section 2 is liftably connected to the rear of a self-propelling running section in an interlocked mode, a planting clutch is interlockingly connected to a planting section-lifting lever set to the running section to continue or interrupt the power transmission from the running section to the planting section 2 and the power-interrupting motion of the planting clutch is interlocked to the planting section-lifting operation of the planting section-lifting lever, a tentative stopper is attached to a lever-supporting shaft which supports the planting section-lifting lever. This tentative stopper is equipped with a cum for tentative stop and another cum for operating the planting clutch to allow an actuator for the tentative stop to act on the tentative stopping cum. In the meanwhile, a planting clutch operator is allowed to act on the planting clutch-operating cum to interlockingly connect the planting clutch through an interlocking mechanism to the planting clutch operator whereby the tentative stopping motion of the tentative stopping actuator to the tentative stopping cum is tuned to the clutch-connecting and the interrupting motions of the planting clutch operator to the cum for the planting clutch operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding rice transplanter.

[0002]

2. Description of the Related Art Conventionally, as a form of riding rice transplanter, a planting section is linked up and down so that it can be moved up and down behind a traveling section that is self-propelled.
A planting clutch for interlocking the planting part lifting operation of the planting part raising / lowering lever by interlocking with the planting part raising / lowering lever provided on the running part and interlockingly connecting the planting clutch that intermittently transmits power from the running part to the planting part. There is something that interlocks the power cut operation of.

In such a riding rice transplanter, a temporary fixing body is attached to a support shaft for supporting a raising / lowering lever of the planting portion, a temporary fixing cam portion is provided on the temporary fixing body, and the temporary fixing cam portion is temporarily fixed. By acting the action body, the planting part elevating lever can be temporarily fixed at a predetermined operation position.

Further, a cam portion for operating a planting clutch is attached to the support shaft, a planting clutch operating body is acted on the cam portion for operating the planting clutch, and a planting clutch is mounted on the planting clutch operating body. By interlockingly connecting through the interlocking device, the planting clutch can be disengaged in conjunction with the planting part raising operation of the planting part raising / lowering lever.

[0005]

However, in the above-mentioned riding rice transplanter, when the raising and lowering lever of the planting portion is operated to raise the planting portion, the lever is temporarily fixed by the temporary fixing body and the temporary fixing action body. It is difficult to synchronize the timing with the timing at which the planting clutch operating cam unit disconnects the planting clutch via the planting clutch operating body and the interlocking device in conjunction with the operation of the planting unit lifting lever. However, there is a problem that it is difficult to obtain good tuning accuracy and operability is poor.

[0006]

In view of the above, according to the present invention, a planting portion is linked to a rear portion of a traveling portion capable of self-propelling so as to move up and down, and the planting portion lifting lever provided on the traveling portion is connected to the traveling portion. The planting clutch that interlocks the power transmission to the planting section is interlocked, and the planting clutch is linked to the raising operation of the planting section elevating lever and the power disengagement operation of the planting clutch is linked. The temporary fixing body is attached to the lever support shaft that supports the section lifting lever, and the temporary fixing body is provided with the temporary fixing cam part and the cam part for operating the planting clutch, and the temporary fixing acting part acts as the temporary fixing acting body. On the other hand, the planting clutch operating body is made to act on the planting clutch operating cam portion, and the planting clutch is linked to the planting clutch operating body through interlocking means to temporarily secure it to the temporary mounting cam portion. Temporary fixing action of the action body and the planting clutch to the cam part for operating the planting clutch. There is provided cents riding rice transplanter, characterized in that Tsu is tuned and clutch engaged action operation of the switch operation member.

The present invention is also characterized in that a cam surface is formed on the temporary fixing body, and the temporary fixing cam portion and the planting clutch operating cam portion are provided on the cam surface.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 is a riding rice transplanter according to the present invention, and the riding rice transplanter A has a planting portion 2 at the rear of a traveling portion 1 which is capable of self-propelling and an elevating link mechanism 3. The planting part 2 can be lifted and lowered by a hydraulic lifting cylinder 4.

The traveling unit 1 is, as shown in FIGS. 1 and 2,
An engine 11 is provided at a front portion of the body frame 10, and an operating portion 12 is provided at a rear portion.

As shown in FIGS. 1 and 3, a mission case 13 is provided on the lower front side of the machine body frame 10. The mission case 13 is linked to the engine 11.
Interlocking connection via 14 and left and right front axle cases laterally outward from the left and right sides of the same mission case 13.
15 and 15 and the front wheels 16 and 16
While mounting, the transmission shaft 35 as a transmission mechanism is extended rearward from the rear part of the transmission case 13, and the planted mission case 2a of the planting part 2 is interlockingly connected to the rear end of the transmission shaft 35.

Further, as shown in FIG. 1, the body frame 10
The rear axle case 17 is attached to the rear part, and the rear wheels 18 are attached to the left and right ends of the rear axle case 17, respectively.The rear axle case 17 is attached to the transmission case 13 via a transmission shaft (not shown). Are linked together.

As shown in FIGS. 1 and 2, a casing body 20 having left and right step portions, a floor surface portion, a seat support portion, and left and right rear fender portions is stretched on the body frame 10. The casing body 20 is integrally molded of synthetic resin having high rigidity such as FRP.

A bonnet 21 is provided at the center of the front side of the casing body 20.
And a fuel tank 22 arranged directly above the engine 11,
The steering shaft 23 of the driving unit 12 described later is covered.

Further, the above-mentioned operation unit 12 is shown in FIG. 1 and FIG.
As shown in FIG. 3, a steering shaft 23 is erected immediately after the engine 11, a handle 24 is attached to the upper end of the steering shaft 23, and a seat 26 is formed at the rear of the casing body 20 behind the handle 24. It is directly attached and arranged on the support portion 20a.

As shown in FIGS. 1 and 2, while the clutch pedal 30 is arranged on the left side of the hood 21,
A brake pedal 31 is arranged on the right side of the hood 21,
Further, while the shift lever 32 is arranged on the left side of the seat 26,
A planting part lifting lever 33 is arranged on the right side of the seat 26.

As shown in FIGS. 3 and 4, the interlocking mechanism 14 described above includes a first interlocking belt 42 and a second interlocking belt 42 between an output shaft 40 provided in the engine 11 and an input shaft 41 provided in the transmission case 13. The interlocking belt 43 and the first input / output pulleys 44, 4 respectively
5 and the second input / output pulleys 46 and 47 are wound in parallel, while the first and second positions are located in front of the interlocking belts 42 and 43.
2nd tension arm 48,49 to tension arm support shaft 50
As a double tension method in which each interlocking belt 42, 43 is selectively tensioned by each tension arm 48, 49, the two-stage gear shifting operation with planting described later can be performed by each tension arm 48, 49. I am trying.

As shown in FIGS. 3 and 4, a hydraulic pump stay 51 attached to the left side wall of the engine 11 is provided with a right cylindrical support portion 52 extending in the left-right width direction, while the body frame 10 is provided. The left side cylindrical support portion 54 extending in the left-right width direction is attached to the support shaft stay 53 attached to the above so as to face the right side tubular support portion 52 on the same axis line. Insert the tension arm spindle 50 rotatably,
The tension arm support shaft 50 has a double-sided support structure in which the left and right ends are respectively supported. 151 is a hydraulic pump, 15
2 is a pump drive belt.

In this way, the tension arm support shaft 50
The rigidity of the tension arm support shaft 50 is ensured and the bending deformation of the tension arm support shaft 50 can be prevented.

Therefore, the tension arms 48 and 49 can be surely pressed against the interlocking belts 42 and 43,
A good clutch function can be ensured.

As shown in FIGS. 3 and 4, a pair of left and right boss portions 55 and 56 are fitted to the above-mentioned tension arm support shaft 50, and the left boss portion 55 is the tension arm support shaft.
The first wire connecting arm 58 is protruded upward from the upper outer peripheral surface of the boss portion 55 while being fixed to the 50 by a fixing pin 57, while the spring connecting arm 59 is downward from the lower outer peripheral surface of the boss portion 55. The base end of the first tension arm 48 is fixed to the tension arm spindle 50 at a position near the right end of the right boss 56, and the tension roller 48a is attached to the tip of the tension arm 48. .

The right boss portion 56 is rotatably fitted to the tension arm support shaft 50 so that the second wire connecting arm 60 is projected upward from the outer peripheral surface of the upper portion of the boss portion 56. The base end of the second tension arm 49 is fixed to the outer peripheral surface of the lower portion of the boss portion 56, and the tension roller 49a is attached to the tip of the tension arm 49. 61 is a spring connecting bracket, 62 is a first spring interposed between the spring connecting bracket 61 and a connecting pin 59a protruding from the spring connecting arm 59, and 63 is a spring connecting bracket 61 and a second tension arm 49. Connecting pin protruding from
It is a second spring interposed between the first and second interlocking belts 42 and 43, respectively.
Press each tension roller 48a, 49a in the middle of
The interlocking belts 42 and 43 are elastically urged so as to tension them.

As described above, the second tension arm 49 rotates with respect to the tension support shaft 50 via the boss portion 56, and the tension arm support shaft 50 itself also has both tubular support portions 52, 5.
It is possible to prevent the trouble that each tension arm 48, 49 fails to perform its tension function satisfactorily due to rust or the like by rotating through 4.

Further, as shown in FIG. 3, the above-mentioned first and second tension arms 48 and 49 are interlockingly connected to the clutch pedal 30, and the clutch pedal 30 is connected to the fuselage frame 10.
It is attached to a pedal support shaft 65 protruding from the rotatably through a boss portion 66, and a clutch operating arm 67 is projected downward from the boss portion 66, and the clutch operating arm 67 and the wire The clutch actuating rod is provided between the engaging pins 68 and 69, which are provided in the left-right width direction so as to face the connecting arms 58 and 60 respectively.
70 are installed. 71 is a spring for restoring the pedal, 72
Is a spring connecting arm that connects one end of the spring 71, and 73 is a spring connecting bracket that connects the other end of the spring 71.

In this way, when the clutch pedal 30 is depressed, the tension rollers 48a and 49a attached to the tips of the first and second tension arms 48 and 49 respectively move to the first tension rollers 48a and 49a.
・ Rotating in a direction away from the second interlocking belts 42, 43,
Both interlocking belts 42 and 43 are loosened so that the clutch is disengaged.

At this time, from the engine 11 to the mission case
The power transmission to 13 is cut off and the front, rear, left and right wheels 16, 16, 18, 1
Drive of 8 is stopped and planted mission case 2a
It constitutes the main clutch structure that also disconnects power transmission to.

Moreover, as shown in FIG. 3, a horizontally elongated ring-shaped engaging portion 70a extending in the axial direction of the clutch operating rod 70 is attached to the tip end portion of the clutch operating rod 70.
The engaging portion 70a is engaged with the engaging pins 68 and 69.

In this way, the engaging pins 68 and 69 can freely slide back and forth within the engaging portion 70a, and within the range, the tension arms 48 and 49 are moved to the planting portion elevating lever 33 which will be described later.
Can be separated into each interlocking belt 42, 43 by
It has been designed so that the operator can perform the two-step shifting operation with a plant.

Further, as shown in FIG. 3, the tip end of a seedling splicing wire 76 is connected to the connecting pin 75 connecting the base end of the clutch operating rod 70 to the clutch operating arm 67,
The seedling splicing wire 76 is extended rearward along the virtual axis of the clutch actuating rod 70, and the base end of the seedling splicing wire 76 is interlocked with the shift lever 32.

In this way, the first and second tension arms 48, 49 are connected to the seedling-growing wire 76 and the clutch operating arm 6 in conjunction with the lever operation of the speed change lever 32 to the seedling-growing position.
7, and the interlocking belt 42, via the clutch operating rod 70,
It is designed so that the clutch can be disengaged by separating it from the side 43.

At this time, since the seedling splicing wire 76 is interlocked with the tension arms 48 and 49 via the clutch actuating rod 70, the seedling splicing wire 76 is shortened by the length of the clutch operating rod 70. It is possible to reduce the operation load.

When the interlocking belts 42, 43 are extended, the clutch function by the tension arms 48, 49 can be satisfactorily ensured by adjusting only the clutch actuating rod 70. It is possible to save the trouble of adjusting.

As shown in FIGS. 5 to 9, the planting portion lifting lever 33 is attached to a lever support shaft 84 via a lever support body 85, and a pair of left and right shaft support brackets 80 attached to the machine body frame 10. , 81 are fitted with tubular supports 82, 83 which are opposed to each other with their axes oriented in the left-right width direction.
A lever support shaft 84 extending in the left-right width direction is rotatably inserted into the lever 83, the lower end of the lever support 85 is attached to the right end of the lever support shaft 84, and the upper end of the lever support 85 is planted. The lower end of the section lifting lever 33 is attached via a pivot bracket 86 so as to be rotatable left and right around an axis of a pivot 87 extending in the front-rear direction. Reference numeral 88 is a planting part elevating lever guide groove, and 89 is a lever restoring spring.

In this way, the planting section lifting lever 33 is
Along the elevating lever guide groove 88, the lever pivot 84 is pivotally operated in the front-rear direction to move the planting part raising operation position (a), the planting part neutral operating position (b) shown in FIG. The planting part lowering operation position (c), the planting part first speed shift operating position (d), and the planting part second speed shifting operating position (e) can be shifted, and the pivot 87 can be used as the center. Locking recesses 88a, 88b, 88 formed in the planting part lift lever guide groove 88 by rotating in the left-right width direction
It can be locked to each c.

In the middle of the lever support shaft 84, as shown in FIG.
As shown in FIG. 6, the temporary fixing body 90 is fixedly mounted, and the valve operating arm 91 is mounted so as to be swingable back and forth via the boss portion 92, while switching the lifting cylinder 4 to the rear upper position. The valve 93 is arranged, the switching spool 93a is projected forward from the switching valve 93, and the valve operating portion 90a formed on the rear upper portion of the temporary fixing body 90 and the valve operating arm 91 are projected on the switching spool 93a. By rotating and pressing the valve action portion 91a formed at the rear end,
By switching the switching valve 93, the piston rod 4a of the lifting cylinder 4 is expanded / contracted so that the planting part 2 can be moved up and down via the lifting link mechanism 3. 104 is a valve stay.

Further, as shown in FIGS. 5 and 6, an automatic neutral return arm 94 is provided at the left end portion of the lever support shaft 84 so as to be directed rearward and downward, and the arm 94 is lifted up and down with the tip portion thereof. An automatic neutral return wire 95 is provided between the work cylinder 4 and the piston rod 4a.

In this way, the planting section lifting lever 33 is
Rotate clockwise as shown in FIG.
When operated up to (a), the valve action part 90
a presses the switching spool 93a to switch the hydraulic circuit so that the switching valve 93 operates to shorten the piston rod 4a, and the piston rod 4a pulls the wire 95 for automatic neutral return, and the wire 95 automatically The neutral return arm 94 is rotated counterclockwise to automatically return the planting part elevating lever 33 to the planting part neutral operating position (b) via the lever support shaft 84, and the temporary fixing body 90 Is returned to the neutral position so that the switching valve 93 can be switched to the neutral position.

As shown in FIGS. 5 to 7, the temporary fixing body 90 is formed with a cam surface 90b bulging forward to form the cam surface 90b.
The cam part 90c for operating the planting clutch is formed on the front end face part of b, and the cam part 90d for temporary fixing is formed on the lower end face. A temporary fixing concave portion 90f, a descending temporary fixing concave portion 90g, a first speed temporary fixing concave portion 90h, and a second speed temporary fixing concave portion 90i are formed.

Then, the rear end of the planting clutch arm 96 as a planting clutch acting body extending forward and upward is attached to the planting clutch arm support shaft 97 mounted on the machine body frame 10 via the boss 98. It is mounted so as to be vertically swingable, and a planting clutch action wire 99 is provided between the tip of the arm 96 and a planting clutch (not shown) provided in the planting mission case 2a. The rolling roller 100 is rotatably attached to the middle part of the
It is in contact with the cam part 90c for operating the planted clutch of 90.

In this way, in the planting portion speed change range where the rolling roller 100 rolls on the upper half of the cam portion 90c for operating the planting clutch, while keeping the planting clutch in the connected state, The planting clutch part is held in the disengaged state in the planting part elevating / lowering region where it rolls on the lower half of the cam part 90c.

At this time, the rolling roller 100 is moved with the planting part elevating lever 33 being shifted to the planting part lowering operation position (c).
Is engaged with the second speed temporary fixing recess 90i of the temporary fixing cam portion 90c.

Further, the front end portion of the temporary fixing arm 102 as a temporary fixing action member extending rearward and downward is freely swingable up and down via the boss portion 103 on the temporary fixing arm support shaft 101 mounted on the machine body frame 10. A tension spring 105 is provided between the rear end of the arm 102 and a valve stay 104 supporting the switching valve 93, and a rolling roller 106 is rotatably attached to the middle of the arm 102. , Rolling roller 10
6 is brought into contact with the temporary fixing cam portion 90d of the temporary fixing body 90.

In this way, the planting part elevating lever 33 is
When the shift operation is performed to the planting portion raising operation position (a), the rolling roller 106 engages with the temporarily holding recess 90e and the lever 33
In the same manner, the planting part elevating lever 33 is moved to the planting part neutral operation position (b),
Planting part lowering operation position (c), planting part first speed shift operating position
(d) and the second gear shifting operation position (e) in the planting section, the rolling roller 106 moves into the neutral temporary fixing recess 90f.
, Descending temporary fixing recess 90g, first speed temporary fixing recess 90h,
Also, the lever 33 can be temporarily fixed by engaging with the second-speed temporary-recessing recess 90i.

At this time, the cam surface 90b is formed on the temporary fixing body 90, and the temporary fixing cam portion 90d and the planted clutch operating cam portion 90c are provided on the cam surface 90b. It is possible to accurately synchronize the temporary fastening operation of the temporary holding arm 102 to the portion 90d and the clutch disengaging action of the planting clutch arm 96 to the cam portion 90c for operating the planted clutch with improved operability. Can be made
The planted clutch can be operated intermittently and accurately in a timely manner. Moreover, the number of parts can be reduced.

As shown in FIG. 8, the valve actuating arm 91 is extended downward from the lever support shaft 84 so as to interlock with the interlocking arm 91b.
Is integrally molded, and the other end of the reverse switching interlocking wire 110, one end of which is connected to the speed change lever 32, is connected to the interlocking arm 91b, and the piston rod 4a of the lifting cylinder 4 is connected.
The other end of the neutral posture restoring wire 111 having one end connected to is connected to the other end, and a posture holding spring 112 is provided between the neutral stay restoring wire 111 and the valve stay 10.

In this way, when the speed change lever 32 is operated to perform the reverse speed change operation, the reverse speed change wire 110 and the interlocking arm are
The valve arm 91 switches the switching valve 93 through the switching spool 93a via 91b, and the piston rod 4a of the lifting cylinder 4 is shortened to raise the planting part 2 through the lifting link mechanism 3. It can be operated.

Therefore, the operator does not need to separately operate the planting part raising / lowering lever 33 to raise the planting part 2 at the time of the reverse gear shift operation, so that an erroneous operation can be prevented and the planting part raising / lowering lever 33 can be prevented. The starting operation of the planting part 2 can be performed easily and the operability can be improved.

When the piston rod 4a is shortened to the maximum, the valve operating arm 93 is restored to the neutral posture via the neutral posture restoring wire 111 and the interlocking arm 91b,
In conjunction with this, the switching valve 93 is switched to the neutral state via the switching spool 93a.

Therefore, the supply of hydraulic pressure to the lifting cylinder 4 can be locked, and the piston rod 4a can be held in the maximum shortened state, so that the planting portion 2 can be securely held in the raised position. You can

Further, as shown in FIG. 5, between the upper end of the valve operating arm 91 and the sensor float 2b provided in the planting part 2 shown in FIG.
The sensor float 2b detects the ascent and descent of the planting part 2 based on the detection result.
The valve operating arm 91 switches the switching spool 93a of the switching valve 93 via 3 to expand / contract the piston rod 4a of the lifting cylinder 4 to automatically move the planting portion 2 via the lifting link mechanism 3. By adjusting the elevation position, the planting depth can be kept constant.

Here, as shown in FIG. 8, a lever compulsory neutral return wire 134 is interposed between the upper part of the lever support 85 and the elevating link mechanism 3.

In this way, as described above, the shift lever
When 32 is operated in reverse gear to raise the planting part 2,
Lever forced neutral return wire 13 for raising the planting part 2
Move the planting part lift lever 33 through 4 to the planting part neutral operation position.
By forcibly returning to (b), the subsequent operation of the planting part elevating lever 33 can be promptly performed from the planting part neutral operation position (b).

As shown in FIGS. 5 and 6, a cam support shaft 115 is disposed at the upper front position of the lever support shaft 84, and the cam support shaft 115 is a left support shaft raised from the machine frame 10. The shaft stay 116 and the right support shaft stay 117 which is erected frontward and upward from the right end of the lever support shaft 84 are horizontally mounted to form the cam support shaft 11.
The tension arm operation cam 118 is attached to the right side of 5, and the diff lock lever 119 is attached to the left side. 120 is a diff lock wire.

Then, the cam 118 for operating the tension arm
Is a cam support shaft 115 as shown in FIGS. 5, 6 and 9.
The boss 121 is loosely fitted to the right side of the boss 121, and the rectangular plate-shaped cam body 122 is attached to the left end of the boss 121, and the top and bottom of the cam body 122 for the first and second operations are respectively opposed to each other. Connect one end of each wire 123,124 and connect each wire 123,124
The other ends of the first and second tension arms 48 and 49 are interlockingly connected to each other to form first and second wire connecting arms 58 and 60.
The rear end of the cam body 122 is connected to one end of a substantially U-shaped link 125, and a restoring spring is provided between the other end of the link 125 and the wire support bracket 126 attached to the machine frame 10. While interposing 127, a bifurcated distal end interlocking engagement body 128 is attached to the right end of the boss 121.

Further, an engaging pin 130 is provided on the upper left side wall of the lever supporting member 85 for supporting the planting part elevating lever 33 so as to project to the left side, and the engaging pin 130 is attached to the planting part elevating lever 33. The above-mentioned interlocking member is only within the range of the planted part shifting operation range, that is, the range in which the planting part first speed shift operating position (d) and the planting part second speed shifting operating position (e) are rotated back and forth. The engaging member 128 is engaged with the united member 128, and the interlocking engaging member 128 and the cam body 122 are integrally rotated about the cam support shaft 115 in association with the lever 33.

In this way, when the planting part elevating lever 33 is shifted to the planting part first speed shift operation position (d), the second operating wire 124 is pulled by the rotation of the cam body 122. Then, the second tension arm 49 is separated from the second interlocking belt 43 via the second wire connecting arm 60 so that the power of the second interlocking belt 43 is cut off, and the first operating wire 123 Is relaxed and the first tension arm 48 tensions the first interlocking belt 42 via the tension roller 48a to keep the power connected, while the planting section elevating lever 33 operates the planting section second speed shift operation. When the shift operation is performed to the position (e), the operation opposite to the above is performed by the rotation of the cam body 122, the first interlocking belt 42 is in the power cut state, and the second interlocking belt 43 is connected to the power. Then, the planted two-stage gear shift operation of the planting section 2 is performed. The so that can be performed by a single planting unit lift lever 33 which also serves as a planting shift lever.

A side marker (not shown) attached to one side of the machine body frame 10 so as to be able to move up and down is interlockingly connected to the planting section elevating lever 33 so as to be able to move up and down.

Therefore, in the present embodiment, the planting part elevating lever 33 is arranged at the right side position of the seat 26, which is a position where the operator can easily operate in the sitting posture, and one such planting part elevating lever 33 is arranged. By operating, the lowering operation of the planting part 2 which is a series of work operations → the operation of setting the fall marker use position of the side marker → the starting operation of the planting part 2 → the speeding up operation of the planting → deceleration operation with the planting → planting It is possible to easily perform the operation of stopping the part 2, the operation of setting the standing storage position of the side marker, and the operation of raising the planting part 2.

Moreover, since the lever support shaft 84 related to the raising / lowering operation of the planting part 2 and the cam support shaft 115 related to the two-stage planting gear shifting operation are separate, corrosion of each constituent member and scattered soil are prevented. Unless the descending operation of the planting part 2 is performed to reduce the malfunction due to adhesion or the like, the two-step shifting operation of the planting cannot be performed. Therefore, the malfunction of the planting part 2 can be prevented and the planting part 2 can be prevented. Work safety can be ensured.

[0060]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, the temporary fixing body is provided with a temporary fixing cam portion and a planting clutch operating cam portion.
While temporarily acting the temporary locking effector on the temporary fixing cam, actuate the planting clutch operating body on the planting clutch operating cam, and link the planting clutch to the same planted clutch operating body through interlocking means. Then, the temporary locking action of the temporary locking member to the temporary locking cam unit and the clutch disengagement action of the planting clutch operating member to the cam unit for operating the planting clutch are synchronized. It is possible to accurately synchronize the temporary fixing operation of the attachment part elevating lever and the disengagement operation of the planting clutch to improve the operability, and it is possible to perform the intermittent operation of the planting clutch in a reliable and timely manner. .

According to the second aspect of the present invention, a cam surface is formed on the temporary fixing body, and the temporary fixing cam portion and the planting clutch operating cam portion are provided on the same cam surface. It is possible to improve the accuracy of synchronization between the operation and the clutch engagement / disengagement operation, and ensure the engagement / disengagement operation of the planted clutch. Moreover, the number of parts can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of a riding rice transplanter according to the present invention.

FIG. 2 is a plan view of the same rice transplanter.

FIG. 3 is a side view of the interlocking mechanism.

FIG. 4 is a plan view of the interlocking mechanism.

FIG. 5 is a side view of a raising / lowering lever of a planting section.

FIG. 6 is a plan view of the raising / lowering lever of the planting part.

FIG. 7 is a side view of a temporary fixing body.

FIG. 8 is a side view of the valve operating arm.

FIG. 9 is a side view of a tension arm operating cam.

[Explanation of symbols]

 A Riding rice transplanter 1 Traveling part 2 Planting part 3 Lifting link mechanism 4 Lifting cylinder

Claims (2)

[Claims] 1. A self-propelled running part is connected to a rear part of a planting part so as to be able to move up and down, and a power transmission from the running part to the planting part is intermittently connected to a planting part elevating lever provided on the running part. In the riding rice transplanter in which the planting clutch is interlocked and the planting part raising operation of the planting part raising / lowering lever is linked to the power disengagement operation of the planting clutch, the lever support shaft that supports the planting part raising / lowering lever is used. The temporary fixing body is attached, and the temporary fixing body is provided with a temporary fixing cam part and a planting clutch operating cam part. The planting clutch operating body is acted on, and the planting clutch is linked to the planting clutch operating body through the interlocking means, and the temporary fastening action operation of the temporary fastening action body to the temporary fastening cam portion is performed.
A riding rice transplanter characterized by synchronizing the clutch engagement / disengagement action of a planting clutch operating body to a planting clutch operating cam portion. 2. The riding rice transplanter according to claim 1, wherein a cam surface is formed on the temporary fixing body, and the temporary fixing cam portion and the planting clutch operating cam portion are provided on the cam surface.