JP2702645B2 - Clutch operation structure of walking rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch operating structure for a walking rice transplanter having a planting clutch and a body steering clutch.

[0002]

2. Description of the Related Art Conventionally, in the above-mentioned walking type rice transplanter, when a so-called headland turn is performed at the end of a field, a body steering clutch is operated to be turned off by an operation lever dedicated thereto, whereby the body is self-controlled. The driving of the planting section is stopped by turning the planting section by running, and cutting and operating the planting clutch by a dedicated operating lever.

[0003]

When turning the headland, it is necessary to perform the turning operation of the steering clutch and the turning operation of the planting clutch separately, which is troublesome. In addition, since the planting clutch lever is operated by releasing the hand from the steering handle, the steering handle can be supported only by one hand for disengaging the planting clutch. As an operation technique capable of solving the problem of the operation labor and handle support, for example, a technique disclosed in Japanese Utility Model Publication No. 2-2175 has been proposed. That is, by operating the airframe steering clutch, the two clutches are linked so that the planting clutch can also be operated in conjunction with it, and when the headland turns, the airframe steering clutch is turned off so that the wheels inside the turning stop. When operated, the planting clutch is disengaged in conjunction with this. That is, the planting clutch can be turned off by the steering clutch lever which can be operated while holding the steering handle. When this operation technique is adopted, it is difficult to align the planting start position after the headland turning and the previous planting end position, or it is necessary to manually move the aircraft. In other words, after the self-propelled turning of the aircraft is completed, the aircraft steering clutch is returned to the on-off position so that the aircraft can move straight by self-propelled movement. When the aircraft moves straight ahead from the point where the turning self-propelled is completed, the drive of the seedling planting section starts and the seedling planting movement starts from this point. Since it is difficult to make the running distance constant at all turning points, it is easy for the planting start point to be displaced in the longitudinal direction of the machine body with respect to the previous planting end point. Also,
In order for the planting start point after headland turning to be aligned with the previous planting end point, when the aircraft reaches the predetermined planting start point after completing the turning self-propelled, return the planting clutch at this time and return to the on position. Since it is necessary to start driving the seedling planting section, the planting clutch must not be engaged until the aircraft reaches the predetermined seedling planting start point after the aircraft completes turning self-propulsion, and the aircraft goes straight. Therefore, it is necessary to artificially push and move the airframe to the starting point for seedling planting while operating either the left-hand steering steering clutch or the right-hand steering steering clutch so that it can be moved. SUMMARY OF THE INVENTION An object of the present invention is to provide a walking type rice transplanter that can easily perform a clutch operation and can easily turn a headland so that a planting start point is aligned with a previous planting end point while supporting a steering handle with both hands. is there.

[0004]

According to the clutch operating structure of the walking type rice transplanter according to the present invention, in order to achieve the object, the planting clutch is switched to disconnection in conjunction with the disconnection operation of the body steering clutch. A check mechanism for linking the planting clutch with the planting clutch in a state, and allowing a setting operation of the planting clutch by the linking mechanism while permitting a setting operation of the body steering clutch; And a planting clutch operating mechanism that releases the restraint mechanism and switches the planting clutch into the on state.

[0005]

The planting clutch operating mechanism may be manually operated, for example, to release the restraint mechanism by operating an artificial operating tool and to operate the planting clutch. Automatically switching the restraint mechanism as it switches from the downward mounting state to the upward mounting state, and
The planting clutch is automatically configured to automatically enter and operate. Then, as the vehicle reaches the headland, squeeze and operate the left-hand steering or right-hand aircraft steering clutch lever to operate the left-hand or right-hand aircraft steering clutch. I do. Then, the planting clutch is also disengaged due to the linking mechanism, and the machine body turns by itself while the planting section stops the seedling planting operation. At this time, since the aircraft steering clutch lever can be operated while supporting the steering handle, support the steering handle with both hands,
It can support the aircraft stably regardless of turning. When the turning of the airframe is completed, the airframe steering clutch lever, which had been operated to the off-going side, is returned to the on-going side. Then, the fuselage steering clutch returns to the on state, and the aircraft moves straight by self-propelled. At this time, the planting clutch does not return due to the restraint mechanism, and the seedling planting section remains stopped. As the aircraft travels straight ahead and reaches the planting start scheduled sideways with respect to the planting end location before turning, at this time, if a manual type is adopted as the planting clutch operation mechanism, By operating the artificial operation tool, if the automatic type was adopted as the planting clutch operation mechanism, it was in the downward mounting state due to the lifting operation of the rear end side of the aircraft for headland traveling In all cases, the planting clutch operating mechanism automatically engages the clutch when the grounding float is raised and lowered for the rear end of the fuselage. Returning to the entry, the planting operation is started with a place where the seedling planting part is aligned with the planting end place before turning as a planting start place.

[0006]

According to the present invention, the planting clutch can be disengaged simply by disengaging the airframe steering clutch, and this clutch disengaging operation can be performed without releasing the operation handle. This makes it possible to turn the headland without requiring any operation effort and while firmly supporting the aircraft with both hands supporting the steering handle and stabilizing the aircraft regardless of turning. Furthermore, the heading of the planting clutch can be easily performed by allowing the vehicle to move straight ahead after the turning of the aircraft by self-propelled to easily turn the headland and to adjust the position of the planting start position relative to the planting end position. You can return at any time,
A good finish can be obtained in which the planting end point before headland turning and the planting start point after headland turning are aligned as linearly as possible.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a pair of left and right traveling wheels 1, 1 is drivable and self-propelled with an engine E, an engine bonnet 2, a spare seedling placement device 3, a steering handle 4, and the like. At the rear of the traveling machine body, there are provided two seedling planting arms 5 and 5 arranged in the lateral direction of the traveling machine body, and a seedling planting section having one seedling rest 6 for supplying seedlings to any one of the planting plant arms 5, One front grounding float 7 disposed on the front side of the traveling body and a pair of left and right rear grounding floats 8 disposed on the rear side of the traveling body are attached to the bottom of the traveling body. Then, a fertilizer applicator including a fertilizer tank 9 located between the left and right wheels 1, 1 and a pair of left and right groove producing devices 10, 10 is used. 9 to 10
So that fertilizer is supplied to the vicinity of the seedling planting position by any one of the seedling planting arms 5 and attached to the traveling machine body, so that the two-row seedling planting operation can be performed, and the fertilizing operation can be performed. , A walking type rice transplanter with a fertilizer is constructed.

A transmission case 11 for each of the left and right wheels 1, 1
A hydraulic cylinder (not shown) is interlocked with an interlocking mechanism comprising an interlocking rod 12 and the like, and this hydraulic cylinder swings the transmission case 11 up and down with respect to the traveling machine body around the axis Y1. , Left and right wheels 1,1
Is configured to be moved up and down with respect to the traveling body.
The front ground float 7 is configured to swing up and down with respect to the traveling body around the axis X1 disposed at the rear end side, and the front end side of the front ground float 7 is controlled by a control mechanism including an interlock rod 13 or the like. In a state where the height of the rear end side of the front grounding float 7 with respect to the traveling body is within a set range while being linked with a control valve (not shown) of the hydraulic cylinder.
The control mechanism is configured to automatically switch the control valve. That is, the depth of seedling planting by the seedling planting arm 5 is detected based on the mounting posture of the front ground float 7 with respect to the traveling machine, and the traveling wheel 1 is moved up and down with respect to the traveling machine in a state where the detected depth is within the set range. It is configured to control the seedlings so that the seedling planting depth can be maintained substantially constant regardless of whether the traveling wheel 1 enters the recess of the plow or climbs on the projection of the plow. .

A pair of steering clutches CL and CR each having an operation arm 14a or 14b shown in FIGS. 2 and 3 is configured to return to the entrance side of a mission M1 located on the rear side of the body of the engine E. In addition to the above, in both the steering clutches CL and CR, the operation arm 14a or 14b is operated to swing up and down around the axis in the longitudinal direction of the fuselage, so that the lowering position ON shown by a solid line in FIG. Is switched to the ascending disengagement position OF shown by the arrow, and the steering clutch C
When L or CR is engaged, the transmission from the engine E to the left or right wheel 1 is switched on, or the steering clutch CL
Alternatively, the transmission is transmitted from the engine E to the left or right wheel 1 by turning off the CR. That is, the steering clutches CL, CR steer the traveling body to the left or right by turning off the transmission to one of the left and right wheels 1 to turn on the transmission to the left and right wheels 1,1. By doing so, the aircraft is steered in a straight-ahead direction. As shown in FIG. 3, a clutch wire 15 is attached to the swing operation arm 14a of one steering clutch CL.
a steering clutch lever 16a interlocked with the steering handle 16a and a steering clutch lever 16b interlocked with the swing operation arm 14b of the other steering clutch CR via a clutch wire 15b. It is arranged and attached near the grip so that it can be operated while supporting the grip. That is, the steering operation of the traveling machine body is performed by operating the one steering clutch CL by the one steering clutch lever 16a, and operating the other steering clutch CR by the other steering clutch lever 16b. It is. The planting mission M2 located at the rear end of the traveling vehicle is provided with a planting clutch CU having an operating shaft 17 as shown in FIG. 2, and the operating shaft 17 is slid in the longitudinal direction of the vehicle by the sliding operation shown in FIG. Is switched to an entry position ON indicated by a solid line and a cut position OF indicated by a dotted line, and with the operation of the operating shaft, the planting mission M2 enters and the planting arm 5
The seedling placement operation is carried out, and the rotation power from the engine E is transmitted to the seedling placement part so that the seedling nest 6 performs the seedling supply operation, the seeding mission M2 is cut off, and the seeding arm 5 is turned on. The transmission from the engine E to the seedling planting part is stopped so that the planting operation is stopped and the seedling placing stand 6 stops the seedling supply operation.

As shown in FIG. 2, a first linking link 21 and a linking wire 2 are supported by a frame portion 18 of the traveling body so as to be swingable about an axis X2 via a support member 18a.
2. The linking mechanism 20 between the steering clutches CL and CR and the planting clutch CU is formed by the second linking link 23 which is supported by the frame portion 19 of the traveling machine body via the support member 19a so as to be swingable around the axis Y2. As shown in FIG. 4, a restraining mechanism 24a supported on the frame portion 19 via a support member 19b and a restraining spring 24b acting on the restraining tool 24a form a restraining mechanism 24 for the planting clutch CU. The restraint 24a
And an interlocking release lever 25b mounted near the left or right grip of the control handle 4 so as to be able to operate while supporting the grip, constitutes the planting clutch operating mechanism 25. Thus, the turning of the machine on the headland can be performed easily and easily, and the planting end point before turning and the planting start point after turning can be aligned in a straight line in the lateral direction of the machine body. That is, the steering clutch lever 16a
Or when the steering clutch CL or CR is disengaged by the steering clutch lever 16a or 16b.
The operation arm 14a or 14b is switched from the descending / entering position ON to the ascending / disengaging position OF due to the pulling operation of the clutch wire 15a or 15b by the gripping operation of.
At this time, the free end side opposite to the side where the clutch wire 15a or 15b is connected to the pivot axis of the operation arm 14a or 14b presses one free end side of the first link 21 to act. For this purpose, the first link 21 swings to pull the link wire 21, and the second link 23 swings to slide the operation shaft 17 from the ON position to the cut position OF. As a result, the linkage mechanism 20 switches the planting clutch CU from ON to OFF in conjunction with the disengagement operation of the steering clutch CL or CR by the steering clutch lever 16a or 16b. The operating shaft 17 of the planting clutch CU is linked to a clutch wire 30 linked to a planting clutch lever (not shown) provided at the rear of the machine body via a return spring 26. 30 is maintained in the pulled-back operation state, and the second
When the operation link 17 is forcibly slid to the cut position OF by swinging the link 23, the return spring 26 is elastically deformed to urge the operation shaft 17 to return to the ON position ON.
When the traction device 24a swings around the pivot shaft center by the support member 19b, and when the working end S of the traction device 24a comes into contact with the front side of the second link 23 as shown by the solid line in FIG. The restraining mechanism 24a serves as a stopper for the second link 23, and prevents the swinging of the second link 23 in the direction in which the operating shaft 17 is switched from the cut position OF to the ON position ON, so that the restraint mechanism 24 is used for towing. State. In the towing production state, the restraining mechanism 24 is engaged with the steering clutch CL by the steering clutch lever 16a and the steering clutch C by the steering clutch lever 16b.
While permitting the R operation, the operation of engaging the planting clutch CU by the linkage mechanism 20 is suppressed. In other words, by using the second link 23 for towing, it is possible to switch the operating arms 14a, 14b to the ascending / into position ON in accordance with the operation of the steering clutch levers 16a, 16b to the inward side. Then, the on-off operation of the steering clutch CL or CR is performed and the operation arm 14 is operated.
a and 14b both release the pressing operation on the first link 23, and the link wire 22
Even if the return link 26 is loosened to allow the return spring 26, the return link 26 disables the swing operation of the second link 23. The traction device 24a swings around the pivot shaft center by the support member 19b, and the working end S of the traction device 24a is displaced laterally with respect to the second link 23 as shown by a dotted line in FIG. When it is in the restraint release position, the restraint mechanism 24 enters the restraint release state. That is, the second link 23 swings due to the return spring 26 to cut the operation shaft 17 to the position OF.
It is possible to perform an operation of switching from ON to the entry position ON. The traction spring 24b oscillates the traction device 24a to the traction position to cause the second link 23 to perform the disengagement operation of the planting clutch CU.
Is configured to automatically switch to the towing production state. The restraint release lever 25b is operated to swing, whereby the interlocking wire 25a is pulled to operate the restraint device 2.
4a is configured to be switched from the restraint position to the restraint release position. When the restraint device 24a switches from the restraint position to the restraint release position, the second link 2
3 switches the operating shaft 17 from the off position OF to the on position ON for the return spring 26, so that the planting clutch operating mechanism 25 exerts its operating force by swinging the restraint release lever 25b. The release mechanism 26 is used to release the restraint mechanism 24, and the operating force of the return spring 26 is used to switch the planting clutch CU from off to on. That is,
When the aircraft reaches the headland with the planting operation, the steering clutch lever 16a or 16b on the inside of the turn is gripped, and the steering clutch CL or CR on the inside of the turn is switched from entering to off. Then, by the action of the linking mechanism 20, the planting clutch CU is switched from the previous entry to the off state, and the restraining mechanism 24 is in a state for towing, and the aircraft turns while the seedling planting arm 5 and the seedling cradle 6 stop operating. To run. When the direction change by the turning movement of the aircraft is completed, the gripping operation of the steering clutch lever 16a or 16b, which has been performed, is released, and the steering clutch CL or CR that has been disengaged is returned to the on state. Then, the left and right wheels 1 are driven, and the body moves straight by self-propelled. At this time, the restraining mechanism 24 is still in the state of towing production, whereby the planting clutch CU is kept off, and the seedling planting arm 5 and the seedling rest 6 are still in the operation stop state. When the aircraft reaches a scheduled planting start point where the seedling planting end point before turning is aligned linearly in the lateral direction of the aircraft with the straight running, the restraint release lever 25b is operated accordingly. Then, by the action of the planting clutch operating mechanism 25, the planting clutch CU returns from the previous cut-off state, the planting arm 5 and the seedling cradle 6 start operating, and the planned planting start point is set as the actual planting start point. Planting work can resume.

As shown in FIG. 5, a brake piece 27 is attached to either the left or right transmission case 11. The brake piece 27 is pivotally supported by the transmission case 11, and the free end of the brake piece 27 contacts the propulsion lug of the wheel 1 to brake the wheel 1. 1 and a brake disengagement position for releasing the braking action on the steering clutch lever 1, and the steering clutch lever 16 a or 16
When the wheel 1 is operated to stop driving by disengaging the steering clutch CL or CR in conjunction with the wheel b, the wheel 1 is also in a braking state, which is smaller than stopping the driving of the wheel inside the turn. The aircraft can be turned by the radius. That is, the steering clutch lever 16a or 16b
When the gripping operation is performed, the brake wire 28 is pulled, and the brake piece 27 is switched to the brake-engaged position due to the pulling operation force. And
When the gripping operation of the steering clutch lever 16a or 16b is released, the brake wire 28 becomes slack, and the brake piece 27 returns to the brake release position due to the return spring 29.

FIG. 6 shows another embodiment of the planting clutch operating mechanism. Left and right rear ground floats 8,
8 is supported by a support portion 33 of the frame portion 19 of the traveling body via a support shaft 32a. By configuring the support shaft 32a to move up and down with respect to the support portion 33 for the function of the elongated hole of the support shaft insertion hole, the rear end side of the traveling machine body is swung up and down around the axle axis, and When the ground pressure acting on the rear ground float 8 changes, the support shaft 32a moves up and down with respect to the support part 33 due to the ground reaction force acting on the rear ground float 8 and the weight of the rear ground float 8 and the like, and Bending and stretching link 3 connecting the front end side of rear landing float 8 to the traveling body
The rear grounding float 8 is configured to move up and down with respect to the traveling machine body by bending and stretching the 4. The support shaft 32a
And the swing link 32b and the interlocking wire 32c,
An automatic planting clutch operating mechanism 32 is configured so that the planting clutch CU can be automatically returned from off to on when the aircraft turns on the headland. That is, when the rear end side of the traveling aircraft is lifted for headland turning, when the rear-ground float 8 descends to the aircraft in a descending mounting state which is set in advance to be used for lifting the aircraft, As a result, the support shaft 32a is lowered, and the support shaft 32a is inserted through the interlocking link 32b, and the interlocking link 32b is swung down around the pivot shaft center X3 by the support portion 33, and the wire 32b is slackened. Then, the restraint device 24a switches from the restraint release position to the restraint position due to the restraint spring 24a. Then, when the rear end side of the traveling body is lowered and returned for planting and running after the headland turning, the rear grounding float 8 is set to an ascending mounting state which is set in advance so as to lower the body.
When the body rises, the supporting shaft 32a rises and the interlocking link 32b rises and swings, whereby the interlocking wire 32c is pulled, and the restraining device 24a is pulled by the pulling force of the interlocking wire 32c. The position is switched from the traction position to the traction release position, and the second link 22 cuts the operating shaft 17 for the return spring 26 to the position O.
When the rear landing float 8 is switched from the set up state to the set down state for the traveling body by switching the entry position ON from F, the restraint mechanism 24 is automatically switched to a state for towing production. When the rear landing float 8 is switched from the downwardly mounted state to the upwardly mounted state with respect to the traveling machine body, the planting clutch operating mechanism 32 automatically releases the restraint mechanism 24 and releases the planting clutch CU. It automatically enters and operates. That is, when the aircraft reaches the headland, the steering clutch CL or CR is disengaged and the rear end of the traveling aircraft is lifted around the axle center. Then, when the rear landing float 8 is lowered to the set lowering mounting state with respect to the traveling aircraft, the restraint mechanism 24 is in a state for towing, and the aircraft travels in a straight line after the direction is changed by turning the aircraft. Even if the steering clutch CL or CR that has been disengaged is returned to the on state, the planting clutch CU is still disengaged. When the aircraft reaches the planting start position, the lifting operation up to that point on the rear end side of the traveling aircraft is released. Then, the back ground float 8
Rises to the above-mentioned set-up mounting state, the action of the planting clutch operating mechanism 32 causes the
4 is automatically released, and the planting clutch CU automatically returns from off to on, so that the planting operation from the planting start point becomes possible.

In order to enable the release operation of the restraint mechanism 24 by manual operation and the engagement operation of the planting clutch CU, the grip portion of the control handle 4 is configured to move up and down a set stroke with respect to the traveling body. When the grip portion rises due to the lifting operation on the rear end side during the turn of the vehicle, the raising mechanism causes the restraint mechanism 24 to be in a state for towing, and the rear end lowering operation after the turning of the traveling body is completed. As a result, the gripping mechanism is released and the planting clutch C is released.
You may implement and implement so that U may switch into an entrance.
Therefore, the restraint release lever and the handle grip are collectively referred to as the artificial operation tool 25b. Instead of the front ground float and the rear ground float, a single ground float that is long in the longitudinal direction of the aircraft may be employed.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

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

FIG. 2 is a side view showing operating portions of a steering clutch and a planting clutch.

FIG. 3 is a rear view of a steering clutch operating portion.

FIG. 4 is a plan view showing an example of a restraint mechanism and its release structure.

FIG. 5 is a plan view of a braking structure.

FIG. 6 is a configuration diagram showing another embodiment of the restraint mechanism and its release structure.

FIG. 7 is a configuration diagram showing still another embodiment of the restraint mechanism and its release structure.

[Explanation of symbols]

 8 Grounding float 20 Linkage mechanism 24 Checking mechanism 25, 32 Planting clutch operation mechanism 25b Artificial operation tool CL, CR Steering clutch CU Planting clutch

Claims (3)

(57) [Claims] An airframe steering clutch (CL), (CR)
The airframe steering clutch (CL), in a state where the planting clutch (CU) switches to the cutoff in conjunction with the turning operation of
(CR) and the planting clutch (CU) are provided with a linking mechanism (20). The linking mechanism (20) is provided while allowing the body steering clutches (CL) and (CR) to enter. A planting clutch operating mechanism (24) for controlling the engagement operation of the planting clutch (CU) to release the system (24) and switching the planting clutch (CU) to the engaged state; 25) A clutch operation structure of a walking rice transplanter provided with (32). 2. The planting clutch operating mechanism (25).
Is a manual operation mechanism that releases the restraint mechanism (24) by a manual operation tool (25b) and engages the planting clutch (CU).
The clutch operation structure of the walking rice transplanter described in the above. 3. The planting clutch operating mechanism (32).
Automatically switches the restraint mechanism (24) in accordance with the switching of the ground float (8) from the set lower mounting state to the set upper mounting state with respect to the traveling body, and operates the planting clutch (CU). 2. The clutch operating structure of a walking rice transplanter according to claim 1, wherein the clutch operating structure is an automatic operating mechanism for automatically entering and operating.