JPS6332575Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a rice transplanter equipped with a lifting mechanism that moves up and down wheels that are attached to the machine body so as to be able to move up and down, and a planting clutch mechanism in a seedling planting device. It is.

(Prior art) Conventionally, a lifting mechanism for vertically moving wheels attached to a machine body so as to be able to move vertically and a planting clutch mechanism in a seedling planting device have been provided, and a hydraulic lifting lever and a planting clutch are used to operate these mechanisms. A device in which the lever is interlocked and connected with a connecting pin is shown in Japanese Utility Model Application Publication No. 53-28134.

(Problem to be solved by the invention) According to the above, if one lever is rotated forward, the other lever will also be rotated forward, and if the other lever is rotated backward, one lever will also be rotated forward. The lever also rotates backwards, so when the hydraulic lift lever is operated to raise the aircraft, the planting clutch lever moves toward the off position, and the hydraulic lift lever is operated to lower the aircraft. It is possible to prevent the planting clutch lever from interlocking toward the on position. Therefore, there is no possibility of a floating seedling situation in which the planting clutch is immediately engaged and the planting claw is driven and the seedlings taken by the planting claw are not planted when the aircraft is not lowered sufficiently. .

However, since both levers are interlocked and connected by a connecting pin, the operation to disable the lever is complicated, and if a guide plate is provided, placing the connecting pin under the guide plate makes it difficult to operate the interlocking and uninterlocking states. It is impossible, and it is difficult to distinguish between interlocking and non-interlocking states. On the other hand, if it is placed on the guide plate, it will be unsightly and will get in the way of lever operation.

(Means for solving the problem) Therefore, the technical problem of the present invention is to provide an interlocking device between the planting clutch lever and the hydraulic lift lever in a rice transplanter that does not cause floating seedlings. The technical means of the present invention to solve this technical problem is to provide a rice transplanter equipped with an elevating mechanism that moves up and down wheels that are attached to the machine body so as to be able to move up and down, and a planting clutch mechanism in a seedling planting device. In interlocking the hydraulic lifting lever that operates the lifting mechanism and the planting clutch lever using an interlocking metal fitting,
The planting lever is configured to be freely rotatable toward the hydraulic lift lever side, and the interlocking fitting on the planting clutch lever side is configured to be freely engaged and detached so as to come into contact with the hydraulic lift lever from the machine lifting side. A cover is provided in the guide groove of the clutch lever to restrict rotation of the clutch lever.
This is an interlocking device for a planting clutch lever and a hydraulic lifting lever in a rice transplanter configured so that the planting clutch lever and the hydraulic lifting lever can be switched between an interlocking state and a non-interlocking state.

(Effect of the invention) According to this technical means, the interlocking fitting on the planting clutch lever side is able to freely engage and disengage from the hydraulic lifting lever so that it comes into contact with the hydraulic lifting lever from the lifting position, so the planting clutch lever can be rotated. In this linked state, when the hydraulic lift lever is operated in the direction of raising the aircraft, the hydraulic lift lever and the planting clutch lever are interlocked so that the planting clutch is disengaged. Since this does not work in conjunction with the hydraulic lift lever when operating toward the position, the planting clutch lever can be engaged independently after operating the hydraulic lift lever in the direction of lowering the aircraft.

Therefore, planting is carried out using the planting claws after the aircraft has been lowered sufficiently, and floating seedlings do not occur.

Since the lid for regulating the rotation of the planting clutch lever is provided in the guide groove of the lever, the planting clutch lever and the hydraulic lift lever can be easily switched between an interlocking state and a non-interlocking state.

Moreover, since the lid can be opened and closed from above, it is easy to operate, and even if the interlocking metal fittings are under the guide plate and cannot be seen from above, it is easy to interlock or disengage the planting clutch lever when it is tilted. The interlocking fittings can be installed under the guide plate, so they are not unsightly.
Does not interfere with lever operation.

(Example) The embodiments shown in the drawings will be described below.

The one in Fig. 1 includes a transmission case 1, a frame 2 with an engine attached to the front part, a transmission case 3 connected to the rear part, and floats 4, 5, 5 on the underside of the machine body, in pairs on the left and right. The rice transplanter is shown running on wheels 9, 9, and the rear end of the transmission case 3 is equipped with a seedling planting device consisting of a seedling platform 6 and a planting mechanism 7, as well as a pair of control handles 8. It is growing.

The wheels 9, 9 are attached to the tips of swing arms 11, 11 rotatably attached to the base of the mission case 1 with a boss 10.

The rear end of each float 4, 5, 5 is attached to the body to which the handle 8 is attached so that its height can be adjusted using a seedling depth adjustment rod 12, and the front end of the center float 4 is attached to the bottom surface of the tip of the frame 2. The outer floats 5, 5 are configured to be movable up and down via links 13, and the tips of the outer floats 5, 5 are also attached to the tips of horizontal bars 14 projecting laterally from the fuselage so as to be movable up and down via links 15, 15. It is being

The lifting and lowering mechanism of the rice transplanter described above is as follows.

That is, in FIG.
There are bell crank type lift levers 16 on both left and right sides of the
Attach the ends of the rods 17 to both swing arms 11.
A single-acting hydraulic cylinder 18 is connected to the engine frame 2 via its piston 1.
9 is provided so as to protrude forward along the center line of the rice transplanter.

A pin 21 is pivotally attached to the tip of the piston 19 so that the center part of a swinging rod 20 can freely swing horizontally.
Both ends of the wheel 0 are connected to the other ends of the lift levers 16, 16 via a connecting rod 22, so that the wheels 9, 9 can be moved up and down in opposite directions.

As shown in FIG. 4, on both the left and right sides of the frame 2, there are body upper limit stoppers 23, 23 on the tip end of which the swinging rod 20 comes into contact when the piston 19 is at its maximum stroke, and on the rear end of the piston 19. While the lower limit stoppers 24, 24 of the machine body are provided, which the swinging rod 20 comes into contact with at the retreated position of 19, the hydraulic pump 25
A switching valve 23 is provided. The hydraulic pump 25 is connected to the pump port P via a circuit 26, and the port A of the switching valve is connected to the inlet port 18' of the hydraulic cylinder 18 via a circuit 27, and the return ports R ₁ and R ₂ are connected to the inlet port 18' of the hydraulic cylinder 18 via a circuit 27. When connected to the oil tank 28 and the spool 29 in the switching valve 33 is in the neutral position, ports A and R ₁ are closed, ports P and R ₂ are in communication with each other, and the spool 29 moves to the front of the aircraft. When ports R ₁ and R ₂ are closed, ports P and A are in communication with each other and the aircraft is raised, and when the spool 29 is moved to the rear of the aircraft, ports P and R ₂ and ports A and R ₁ are in communication with each other. It is configured so that the aircraft can be lowered.

Further, a port 30 provided at the tip of the hydraulic cylinder 18 is connected to the hydraulic pump 2 via a conduit 31.
5, each connected to the oil tank 28 at the end of the piston, and an L connecting the end bottom surface and the side surface of the piston.
A letter-shaped passage 32 is provided as shown in FIG.

The opening on the side of the piston of the L-shaped passage 32 is provided with a relief port 32a so that it begins to open into the port 30 before the piston 19 reaches its maximum stroke.

In addition, in FIG. 3, 34 is the fuselage frame 2.
A pin 35 is pivotally attached to the lower part of the sensor 34, and the sensor 34 is energized by a coil spring (not shown) wrapped around the base pin 35 so that its tip comes into contact with the upper surface of the float 4. . 36 is a pin pivotally supported above the switching valve 33; an arm 37 that engages with the spool 29 of the switching valve 33 and a bell crank lever 38 are fixed to the pin 36;
One end of the bell crank lever 38 and the sensor 3
When the sensor 34 rotates downward, the switching valve 33 switches to lower the fuselage, and when the sensor rotates upward, the switch valve 33 switches to raise the fuselage. The other end of the lever 38 is attached to a hydraulic lift lever 42 which is pivoted by a pin 41 at an appropriate location on the control handle 8 so as to be able to rotate in the longitudinal direction of the aircraft body, and by rotating the lever 42 in the forward direction, They are connected via a rod 43, a link 44, a rod 45, and an arm 46 so that the switching valve 33 is switched to lower the fuselage, and rearward rotation of the lever 42 switches to raise the fuselage.

Note that when the hydraulic lift lever 42 is in the body-up position, the sensor 34 linked thereto contacts the bottom surface of the frame 2, while when the hydraulic lift lever 42 is in the body-down position, the sensor 34 and the bell crank are in contact with the lower surface of the frame 2. The rod 39 that communicates with the lever 38 is compressed by the bending deformation of the spring 40 provided in the middle, thereby preventing the sensor 34 from being excessively pressed against the float 4, and at the same time, the hydraulic lift lever 42 is rotated to the body lowering position. In other words, the hydraulic lifting lever 42 is configured to allow the vertical movement of the aircraft body in preference to the vertical movement of the aircraft body by the sensor 34.

Next, to explain the planting clutch mechanism in the seedling planting device, the seedling platform 6 is attached to the operating handle 8 via a guide rail 47 so as to be able to move laterally, and the power of the engine is applied to the shaft as shown in FIG. 4
Power is transmitted from the intermediate shaft 53 through a chain 54 to a main shaft 55 and from the main shaft 55 through a variable speed gear mechanism 56. The camshafts 57 to be transmitted are each supported perpendicularly to the machine body, and the feed shafts 59 have both ends in contact with the inner surface of a bracket 58 attached to the front surface of the seedling stand 6.
is provided slidably parallel to the camshaft 57, and a boat-shaped sliding key 61 fixed to the feed shaft 59 is engaged with a reciprocating screw groove 60 provided on the outer periphery of the camshaft 57. The seedling table 6 is transported horizontally.

Both ends of the main shaft 55 inside the transmission case 48 protrude from both side surfaces of the case, and tubular transverse members 62, 62 are connected to the protruding ends.
A chain case 63 is fixed to the tip of the chain case 63, and claw shafts 64, 64, 65 are attached to the lower part of the transmission case 48 at the lower end of the chain case 63.

The pawl shaft 65 is rotationally driven from the intermediate shaft 53 via a chain 66 and a safety clutch 67, and the pawl shaft 64 is rotated from the main shaft 55 through transmission shafts 68, 68 and the chain 6.
9, 69 are further driven in rotation via safety clutches 70, 70. Seedling planting mechanisms 7 are attached to the claw shafts 65 and 64, respectively.

As shown in FIG. 6, the planting clutch mechanism 52 includes a gear 51 on an intermediate shaft 53 and a clutch 7 slidably fitted on the intermediate shaft 53 by spline engagement.
1 and a shift lever 72 that engages with a clutch 71 to operate it by sliding.A gear 50 attached to a power transmission shaft 49 from the engine meshes with the gear 51. Clutch pawls that can engage with each other are provided on opposing surfaces of the clutch 71 and the clutch 71, and a spring 73 fitted on the intermediate shaft 53 presses and biases the clutch 71 in the engaging direction.

The tip of the outer wire 74 is fixed to a joint piece 77 fixed to the tip of the shift lever 72 by a pin 76, and the tip of the inner wire 75 is fixed to the conduction case 48 via a spring 78. The end is attached to the planting clutch lever 79 of the control handle. Therefore, when the planting clutch lever 79 is rotated forward, the outer wire 74 and the inner wire 75 are loosened, the planting clutch mechanism is turned on by the force of the spring 73, and the planting clutch lever 76 is rotated backward. The shift lever 72 rotates against the spring 73 due to the tension of the inner wire 75 and the extension pressure of the outer wire 74, and the planting clutch mechanism is activated.
It becomes OFF.

This invention is a rice transplanter equipped with a hydraulic lifting lever and a planting clutch lever that operate the lifting mechanism for moving the wheels up and down and the planting clutch mechanism, respectively, by rotating the planting lever toward the hydraulic lifting lever. The interlocking fitting on the planting clutch lever side is configured to be movable, and the interlocking fitting on the planting clutch lever side is configured to be able to freely engage and detach from the hydraulic lifting lever so as to come into contact with it from the machine lifting side, and the lid that restricts the rotation of the planting clutch lever is attached to the hydraulic lift lever. It is installed in the guide groove so that the planting clutch lever and hydraulic lifting lever can be switched between interlocking and non-interlocking states.When the hydraulic lifting lever is raised, the planting clutch is disengaged. The lifting lever and the planting clutch lever can be interlocked, and the planting clutch is prevented from engaging even when the hydraulic lifting lever is lowered to lower the machine, so that the planting arm rotates until the machine touches the field, and the planting is done. The device uses a claw to pick up the seedlings on the seedling platform and prevents them from being released onto the floating surface.The lid installed in the guide groove that controls the rotation of the planting clutch lever allows the levers to be linked or disengaged. This allows the state to be easily switched.

Figures 7 and 8 show the interlocking connection structure between the hydraulic lifting lever and the planting clutch lever. Both the hydraulic lifting lever 42 and the planting clutch lever 79 are pivotally supported on the shaft 41 and can swing back and forth. Yes, 42
79a and 79a both indicate their boss portions. And the planting clutch lever 79 is the boss part 79.
Further, the hydraulic lift lever 42 is pivotally supported to be slidable in the left and right direction with respect to the support portion 79b integral with the
An interlocking metal fitting 81 that can be freely engaged and detached from the planting clutch lever 79 is provided on the planting clutch lever 79.

The interlocking fitting 81 can come into contact with the hydraulic lift lever 42 from the rear, and a spring 83 is tensioned between this and a collar 82 interposed between the bosses 42a and 79a, and the planting clutch lever 79 is moved as shown in FIG. It is energized in the direction shown by the imaginary line, that is, in the direction in which it engages with the hydraulic lift lever 42. Each lever 42,
79 is movable along guide grooves 85 and 86 of a guide plate 84 fixed to the handle part.
A, B, and C in 5 indicate the locking positions of the aircraft up, neutral, and aircraft down, respectively, D of the guide groove 86 indicates the position where the planting clutch is disengaged, and E indicates the position where the planting clutch is engaged. A lid 8 is attached to one side edge of the guide groove 86.
7 is attached with a hinge 88 so as to be freely openable and closable, and this constitutes an interlock release plate, which is biased downward.

Further, the edge of the lid 87 facing the position D has a notch _D1 in which the planting clutch lever engages. Therefore, the lid 8
7, the planting clutch lever 79 is tilted toward the hydraulic lifting lever 42 by the spring 83, and its interlocking metal fitting 81 becomes engaged with the hydraulic lifting lever 42.

Also, if the lid 87 is closed, the planting clutch lever 7
When changing the state from the off state to the on state, this lid 8
7, and the interlocking fitting 81 is pulled up against the force of the spring 83, so that it is disengaged from the engagement position with the hydraulic lifting lever 42.

Therefore, when the lid 84 is closed, the hydraulic lifting lever 42 and the planting clutch lever 79 can be operated independently in a state where the interlocking is released, and when the lid 87 is open, the interlocking fitting 81 is operated as the hydraulic lifting lever. 42, and in order to open this lid, the planting clutch lever 79 is engaged with the notch _D1 of the lid at the D position, and the lid 87 is raised by the force of the spring 83.

Therefore, first, each lever operation when releasing the interlocking will be explained.

When the hydraulic lift lever 42 is rotated toward the front of the aircraft, that is, toward the lowered position C of the guide groove 85,
In this case, the interlocking metal fitting 81 is in the release position, so it can be moved without being affected by the interlocking metal fitting 81.
The switching valve 33 that interlocks the hydraulic lift lever 42 is switched to lower the machine so that ports P and R ₂ and A and R ₁ communicate with each other, and the hydraulic pressure from the hydraulic pump 25 and the hydraulic pressure from the hydraulic cylinder 18 are returned to the oil tank 28. ,
The piston 19 of the hydraulic cylinder 18 moves backward due to the weight of the aircraft, and both swing arms 11 rotate upward, causing the aircraft to descend.Then, the hydraulic lift lever 42 is moved to the rear of the aircraft, that is, to the raised position A. When the switch valve 33 rotates toward the front, the switching valve 33 closes ports R ₁ and R ₂ and switches to raise the aircraft so that ports P and A communicate with each other, and the hydraulic pressure from the hydraulic pump 25 is sent to the hydraulic cylinder 18, and the piston is 19 moves forward, both swing arms 11 move forward, and both swing arms 11 rotate downward, causing the aircraft to rise.

Also, if the hydraulic lifting lever 42 is placed at position B, which is between the guide grooves B, the switching valve 33 closes ports _R1 and A.
The ports P and _R2 are switched to the neutral position where they communicate with each other, and the oil pressure in and out of the hydraulic cylinder 18 is cut off, so the lifting and lowering of the aircraft can be stopped at any position.

And the hydraulic lift lever 42 is at position A for raising the aircraft.
, the piston 19 protrudes to the maximum, and the swinging rod 2
While the front surface of 0 contacts the stoppers 23, 23, the relief port 32a of the L-shaped passage 32 in the piston 19 opens to the port 30 to the oil tank 28, and oil is continuously sent into the hydraulic cylinder 18. Hydraulic pressure is released from the relief port 32a to the oil tank 2
8, the upward movement of the aircraft automatically stops at the maximum upward position and is held at that position, allowing it to travel on the road in this state.

After driving on the road with the aircraft in a highly elevated state, it is necessary to carry it into the field and perform rice planting work.
The machine is stopped, and the hydraulic lift lever 42 is rotated toward the lower position C.

Then, the switching valve 33 switches to lower the aircraft, and the aircraft begins to descend. After the float 5 touches down on the field, the distance between the float and the aircraft gradually approaches, and eventually the height of the float and the aircraft reaches a predetermined height. When the sensor 34 in contact with the top surface of the float 5 rotates upward, the switching valve 33 is returned to the neutral position, and the machine body stops descending, and the height of the machine body relative to the field surface is reduced. It is automatically set to a predetermined height position, and in this state, the machine body is driven forward, and the planting clutch mechanism is turned on by operating the planting clutch lever 79 to drive the seedling planting device.

Set the planting clutch lever 79 to clutch engaged position E.
Since the interlocking metal fitting 81 is not in an interlocking state when operating toward the position, the interlocking fitting 81 can be operated without being affected by the hydraulic lifting lever 42.

If the height of the machine relative to the field changes due to unevenness in the field where the wheels 9 touch the tiller and the float 4 touches the ground while moving forward while performing rice planting work in the above conditions, By the downward rotation of the sensor 34 in contact with the float 4, the switching valve 33 was switched to lower the aircraft, and the aircraft was returned to a predetermined height position, and the height relative to the field surface was changed to become lower. In this case, the upward rotation of the sensor 34 causes the switching valve 33 to switch to raise the body, and the body is automatically controlled to return to a predetermined height position.

Next, the planting clutch lever 79 which is a feature of this project
To explain how the hydraulic lift lever 42 and the hydraulic lift lever 42 are linked together, before planting with the machine in the raised position and the planting clutch disengaged, first move the hydraulic lift lever 42 to the lower position C. After lowering the machine by operating it toward , move the planting clutch lever 79 to position D and engage it with the notch D ₁ of the lid 87 facing D. Then, the planting clutch lever 79 and the lid 87 are pulled together by the spring 83 and tilted toward the hydraulic lifting lever 42 side.

Then, the lid 87 will stand up, so remove the planting clutch lever 79 from the notch D ₁ while it is still in this state.
Rotate towards the E side where the clutch is ON.

The planting work thus begins, but when moving the hydraulic lift lever 42 toward the raised position A during turning, the planting clutch lever 79 is moved by the spring 83.
The interlocking metal fitting 81 is the hydraulic lifting lever 4.
2 (phantom line in FIG. 7), it moves together with the planting clutch lever 79.

Therefore, when the hydraulic lift lever 42 is raised, the planting clutch is automatically disengaged.
Therefore, even in this case, the planted seedlings are not released into a floating state by the planting arm.

Next, when the hydraulic lifting lever 42 is rotated toward the lower position C, the interlocking metal fitting 81 contacts the hydraulic lifting lever 42 from behind, so even if the interlocking metal fitting 81 is tilted, this will not cause any damage. The hydraulic lifting lever 42 can be moved freely without any problems, and the planting clutch lever 79 can be turned on after the hydraulic lifting lever 42 has been moved.

In this case, the lid 87 is moved along the guide groove 86 without engaging with the notch D1 of the lid ₈₇ . Therefore, the lid 87 remains upright.

When the lid 87 remains upright, the above-mentioned interlocking state can be repeated, and when it is desired to release the interlocking state, the lid 87
You can close it manually.

In any case, in this case, when the hydraulic lift lever is raised, the planting clutch is automatically disengaged, and when the planting clutch is engaged, the hydraulic lift lever is lowered, without interlocking with the hydraulic lift lever. The planting clutch can be put in independently, and the planted seedlings will not be released into a floating state by the planting arm until the machine is lowered to the rice field.

[Brief explanation of the drawing]

Figure 1 is a side view of the rice transplanter, Figure 2 is a plan view of the same as above, Figure 3 is a slope view of the lifting device, Figure 4 is an enlarged sectional view of the cylinder part of the lifting device, and Figure 5 is the seedling transplanter. 6A and 6B are enlarged sectional views of the planting clutch mechanism and a front view of the planting clutch lever portion, FIG. 7 is a front view of the proposed device, and FIG. 8 is a plan view of the guide plate. . 42... Hydraulic lift lever, 79... Planting clutch lever, 81... Interlocking metal fittings.

Claims (1)

[Scope of utility model registration request] In a rice transplanter equipped with an elevating mechanism that moves up and down wheels that are attached to a machine body so as to be able to move up and down, and a planting clutch mechanism in a seedling planting device, a hydraulic elevating lever that operates the elevating mechanism and a planting clutch lever are provided. In order to interlock and connect the two with an interlocking metal fitting, the planting clutch lever is configured to be rotatable toward the hydraulic lifting lever side, and the interlocking fitting on the planting clutch lever side is connected to the hydraulic lifting lever from the aircraft lifting side. The planting clutch lever and the hydraulic lift lever are configured to be freely engaged and detached so as to be in contact with each other, and a lid for regulating the rotation of the planting clutch lever is provided in the guide groove of the lever, and the planting clutch lever and the hydraulic lifting lever are switched between an interlocking state and a non-interlocking state. An interlocking device between a planting clutch lever and a hydraulic lifting lever in a rice transplanter configured to enable