JPS601543Y2 - Clutch mechanism in rice transplanter - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rice transplanter that separates and plants mat seedlings using a planting device while horizontally moving a seedling stand, and in particular supplies mat seedlings from an auxiliary seedling stand to the seedling stand. The present invention relates to a clutch mechanism that simultaneously stops the seedling stand in a fixed position, stops the planting device, and stops the machine when doing so.

In a rice transplanter that supplies mat seedlings from an auxiliary seedling tray to a seedling tray that moves laterally, the mat seedlings cannot be replenished smoothly unless the seedling tray aligns with the auxiliary seedling tray and stops. cannot be done.

This device that automatically aligns and stops the seedling stand with the auxiliary seedling stand has been proposed, for example, in Japanese Patent Application Laid-Open No. 52-107911.

This proposal involves interposing a clutch on the power shaft that drives the drive device for the seedling tank, and by operating an operating lever, the clutch is disengaged to stop the seedling tank when the seedling tank reaches an appropriate position. be.

However, this device has a clutch interposed in the power shaft of the seedling tank in order to stop the seedling tank, and cannot stop the machine from running.

Therefore, in order to stop a rice transplanter that has planted seedlings at regular pitches on the rice field in order to replenish the rice seedlings, another clutch is required.

Moreover, since it is impossible to stop the clutch for running the rice transplanter and the clutch for stopping the seedling tank at the same time,
For example, if the clutch for stopping the seedling tank is released first, the seedling tank will stop, but the machine will still be moving, resulting in missing plants on the rice field.

In order to eliminate these missing plants, the overrun aircraft must be moved backwards to match the pitch of the plants that have already been planted.

Also, if you disengage the aircraft running clutch first, the aircraft will stop, but at that point, the seedling tank, planting device, etc. will be operating, so many seedlings will be planted in the same location. .

In addition to these many problems with the performance of rice transplanters, there were many unresolved problems such as the extremely complicated structure of conventional devices that required a special clutch to stop the seedling tank.

Therefore, in order to supply mat seedlings from the auxiliary seedling holder to the seedling holder, the present invention stops the seedling holder at a position that matches the auxiliary seedling holder, and also stops the machine at the same time. This was devised as a result of research on how to disengage with a single clutch.

The important point of this invention is that the clutch mechanism is interposed in the main power transmission path through which power is transmitted from the power source, so that the traveling of the aircraft, the seedling stand, the planting device, etc. can be stopped simultaneously with one clutch mechanism. The second point is that the position detection signal of the seedling stand is transmitted to the clutch mechanism by a clutch engagement/disengagement mechanism using a wire, and the clutch mechanism is engaged/disengaged to stop the seedling stand at a predetermined position. Furthermore, the wire-based clutch engagement/disengagement mechanism is provided with a coupling/disconnection mechanism that inherits or absorbs the signal transmission operation to the clutch mechanism, so that the clutch mechanism can be quickly disengaged with a simple operation when replenishing mat seedlings. be.

Next, an embodiment of the present invention will be explained with reference to the drawings. In FIG. 1, an engine 2 is provided in the front of the driver's seat 1, and a transmission 3 is provided in the lower part of the rear of the driver's seat 1. There is.

As shown in FIG. 2, the engine 2 and the transmission 3 are connected via a main power transmission shaft 5 by transmission with a belt 4, thereby forming a main power transmission path 6.

On the other hand, inside the mission 3, it is branched into a driving power transmission path 7 and a working power transmission path 8, and one side of the driving power transmission path 7 has a propeller shaft 9 and a differential gear 10. The front wheel 11 is configured to drive the front wheel 11;
The rear wheels 13 are configured to be differentially operated via a differential device 12.

Further, as described above, the working power transmission path 8 which is branched from the driving power transmission path 7 in the transmission 3 is connected to the Napier screw shaft of the seedling stand 16 of the working device 15 via the working machine power shaft 14. 17, a planting device 18, and the like.

The main power transmission path 6 of the power transmission path configured in this way
A pulley 19 that receives motive force from the engine 2 is attached to the main power transmission shaft 5 inside through a clutch mechanism 20.

This clutch mechanism 20 is a multi-disc friction type clutch, and is normally biased by a spring 21 in the direction of arrow A in FIG. The power is transmitted to the power transmission shaft 5.

Further, when the plate 22 moves in the direction of arrow B in FIG. 2, the clutch is disengaged and power transmission to the main power transmission shaft 5 is cut off.

On the other hand, the Napier screw shaft 17 of the seedling stand 16 is
It is for horizontally moving the seedling stand 16, and this shaft 1
7, a guide bar 23 disposed on the underside of the seedling stand 16
One end of the slide block 24 is fixed to the center, and the other end of the slide block 24 is screwed together.

A slope cam 25 is formed at the other end of the slide block 24, as shown in detail in FIG.

This inclined cam 25 is a cam for indicating that the seedling stand 16 is located at the center when the seedling stand 16 is moved laterally, and its position is detected by a clutch engagement/disengagement mechanism 26 using a wire.

To explain the clutch engagement/disengagement mechanism 26, one end of a cam follower 28 is pivotally attached to the case 27 so that the inclined cam 25 can come into contact with the cam follower 28.

One end of an inner wire 30 is attached to an arm 29 extending outward from the case 27 from the pivot point.

The other end of this inner wire 30 is, as shown in FIG.
It is attached to the upper end of an actuating arm 32 that is swingably disposed near the clutch mechanism 20 and presses the plate 22 of the clutch mechanism 20 via a bearing 31 at the lower part of the pivot point.

An outer wire 33 is disposed on the side of the working machine 15 of the inner wire 30 connected in this manner, and the outer wire 33 has one end fixed to a fixed part of the working machine 15 and the other end adjustably fixed to the collar of the transmission 3. The inner wire 30 is inserted through the inner wire 30.

The body frame 34 of the inner wire 30 next to the clutch mechanism 20 is provided with a connection/disconnection mechanism 35 that connects/disconnects the seedling stand 16 position signal issued by the slope cam 25 to the clutch mechanism 20. A clutch engagement/disengagement mechanism 26 is constructed by the following.

To explain this connecting/disconnecting mechanism 35, as shown in FIGS. 2 to 4, one end is fixed to the flange of the clutch mechanism 20 on the fuselage frame 34, and the other end is connected to the operating lever 36 from its pivot point. An outer 38 fixed to an outer stopper 37 extending downward is arranged through which the inner wire 30 is inserted.

The relationship between the outer 38, the inner wire 30, and the outer 33 adjacent to the work machine 15 is determined by the operating lever 36.
When is in position ■ in Figures 2 and 3, the outer stopper 37
The inch wire 30 is formed to be long so that the inner wire 30 from to the arm 29 is slack, and the operation lever 3
When the arm 29 moves to the @ position, that is, when the outer stop 37 moves a distance from the solid line position to the imaginary line position as shown in FIG. The structure is such that the inner wire 30 up to the inner wire 30 is stretched.

The operating lever 36 includes a lever main body 39, a rod 40 that is slidably and loosely fitted into the lever main body 39, a knob 41 provided at the tip of the rod 40, a notch 42 provided at the inner end of the rod, and a notch 42 provided at the inner end of the rod. It is composed of a spring 43 that biases upward, and a ratchet 44 fixed to the body frame 34 to which the notch 42 engages and disengages.

The operating lever 36 configured in this manner is arranged on the side of the driver's seat.

On the other hand, the clutch engagement and disengagement mechanism 45 for driving, which is arranged below the driver's seat 1, includes a clutch arm 46 pivotably attached to the fuselage frame 34, an arm 47 extending from the clutch arm 46 below the pivot point, and It has a long hole 49 at one end that fits into a pin 48 implanted in the arm 47, and a connecting rod 50 attached to the operating arm 32 at the other end.

Now, during normal operation, that is, when the clutch mechanism 20 is in the engaged state, the motive force from the engine 2 is transmitted to the main power transmission path 6 via the clutch mechanism 20. From this transmission path 6, one side is used for driving. The front wheels 11 and the rear wheels 13 are driven via the power transmission path 7, and the other drives the lateral movement of the seedling stand 16, the planting device 18, etc. through the power transmission path 8 for work.

When the operator wants to stop the rice transplanter during rice transplanting in this way, when the driver steps on the clutch arm 46, the pin 48 of the arm 47 comes into contact with the end of the elongated hole 49 and is activated via the connecting rod 50. The arm 32 is rotated in the direction of arrow C.

Therefore, the plate 22 moves toward the spring 2 in the direction of arrow B.
1, the clutch mechanism 20 is disengaged and the power from the engine 2 is cut off, causing the entire rice transplanter to stop.

Furthermore, if the number of matted seedlings on the seedling platform 16 decreases during rice transplantation, a sensing device (not shown) notifies the driver of the time to replenish the seedlings.

Then, when the driver pushes the knob 41 of the operating lever 36 and pulls up the operating lever 36 from the ■ position to the @ position in FIG. Move the distance and get outer 38
to deflect.

Due to this deflection of the outer 38, the inner wire 30 inserted therein is pulled by the frictional force between the inner wire 30 and the outer 38, so that the slack inner wire 30 between the outer stop 37 and the arm 29 is tightened.

At this point, rice planting work is continuing.

Therefore, the seedling stand 16 is moving laterally, and when the seedling stand 16 moves to the center position of the machine body, the slope cam 25 swings the cam follower 28 by a distance H as shown in FIG.

Therefore, the arm 29 rotates in the direction of arrow E, as shown in FIG. 2, and pulls the inner wire 30, which has already been tensioned by the operating lever 36, downward.

When the inner wire 30 is pulled downward, the operating arm 3
2 reacts immediately and rotates in the direction of arrow C, pushing the plate 22 in the direction of arrow B.

As a result, the clutch mechanism 20 is disconnected and the power transmission from the engine 2 to the main power transmission shaft 5 is cut off, so the pulley 1
9 idles and the machine body stops, the seedling platform 16 stops at the center position of the machine body, and the planting device 18 also stops at the same time.

At this time, the clutch arm 46 is connected to the elongated hole 4 of the connecting rod 50.
It does not work due to the action of 9.

Then, if the working machine 15 is raised to the position of the auxiliary seedling rest 51 that has been set in advance at the center of the machine body in Figure 1, the auxiliary seedling rest 51 and the seedling rest 16 will match, so the mat seedlings can be placed on the auxiliary seedling rest. The seedlings can be easily placed on the seedling stand 16 from the stand 51.

When this work is completed, lower the work equipment 15 again and lower the operating lever 36 from the ◎ position to the ■ position. The outer wire 38 that was bent will return to its original state, so the inner wire 30
It will become loose.

When the inner wire 30 is loosened, the spring 21 moves the plate 22 in the direction of arrow A and rotates the actuating arm 32 in the direction of D, and the clutch mechanism 20 is again engaged and the pulley 19, which had been idling, is Since the main power transmission shaft 5 is rotated together with the main power transmission shaft 5, the machine body starts running, and the seedling stand 16 and the planting device 18 also start operating at the same time as the machine body runs.

Therefore, seedling planting work can be started without shifting the pitch from the already planted pattern that was planted on the rice field before the machine stopped.

Note that the arm 29 moves up and down as the seedling stand 16 moves laterally, but when the operating lever 36 is in the position ■, the inner wire 30 is loose, so the inner wire 30 absorbs the up and down movement of the arm 29. The clutch mechanism 20 is not operated.

In this embodiment, the vertical movement of the arm 29 is absorbed by the loosening of the inner wire 30. For example, as shown in FIG. Attach arm 2
9 pin 54 facing the elongated hole 52 and the hook 53
may be biased downward by a spring 55.

As described above, according to the present invention, since the clutch mechanism is interposed in the main power transmission path through which power is transmitted from the power source,
It is possible to stop the machine from traveling and stop the seedling stand, planting tools, etc. at the same time with a single clutch mechanism.

In addition, since the position detection signal of the seedling stand is transmitted to the clutch mechanism by the clutch engagement/disengagement mechanism using a wire, the seedling stand can be stopped at a desired position.

Therefore, if the seedling stand is stopped at the set position of the auxiliary seedling stand, the mat seedlings can be replenished very easily.

Furthermore, in addition to these, by providing a connecting/disengaging mechanism to the clutch engaging/disengaging mechanism using a wire, there is also an advantage that the clutch mechanism can be engaged/disengaged with a simple operation.

In addition, the clutch mechanism can also be engaged and disengaged with the clutch engagement and disengagement mechanism for traveling, so depending on the working condition of the aircraft,
It can be used in conjunction with the wire-based clutch engagement/disengagement mechanism.

This invention has such effects, so even if it is necessary to replenish seedlings on the seedling stand during rice planting, the pitch between the already planted seedlings and the seedlings to be planted after replenishing the seedlings will not deviate and the pitch will be maintained. This is an extremely useful device that not only allows seedlings to be planted, but also has a simpler structure, significantly improving the performance of the rice transplanter.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an overall side view, FIG. 2 is an enlarged side view of the main part, FIG. A plan view, FIG. 5 is a sectional view of the lateral movement device for the seedling tray, and FIG. 6 is an explanatory diagram of the slope cam.
FIG. 7 is an explanatory diagram of an inner wire attachment part showing another embodiment. 6... Main power transmission path, 7... Power transmission path for traveling, 8... Power transmission path for work, 16
... Seedling stand, 20 ... Clutch mechanism, 26 ... Clutch engagement and disengagement mechanism using wire, 3
5... Connection/disconnection mechanism, 45... Clutch engagement/disengagement mechanism for traveling.

Claims (1)

[Scope of utility model registration request] A clutch mechanism is interposed in the main power transmission path before branching into the power transmission path for running the rice transplanter and the power transmission path for rice transplanter work, and this clutch mechanism is operated by the power from the power transmission path for working. A clutch engagement/disengagement mechanism using a wire transmits a position detection signal of the seedling stand, and a clutch engagement/disengagement mechanism for traveling is engaged and disengaged. A clutch mechanism in a rice transplanter equipped with a disconnection mechanism.