JP2004329016A - Riding rice transplanter - Google Patents

Abstract

Provided is a riding type rice transplanter provided with a switching mechanism for switching a drawing marker to a stored posture for smoothly linking a lifting operation lever and a lock switching tool.
A raising and lowering operation lever (8) for switching and setting a seedling planting device to a running operation state, a neutral stop state, a lowering operation state, and a planting state is provided for a traveling machine body. A lock fitting 14 for locking the drawing marker in the storage position and a lock switching tool 24 for switching the lock fitting 14 between the locked state and the unlocked state are linked. The lock switching tool 24 is integrally moved to follow the switching operation of the lifting operation lever 8 to each operating state, and the lock switching tool 24 is operated by operating the lifting operation lever 8 in a direction different from the switching operation direction. It is configured to be switchable to the unlocked state.
[Selection diagram] FIG.

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention connects the seedling planting apparatus to the traveling machine so as to be able to move up and down, and also links a drawing marker that forms an index of the next planting process on the rice field with the working grounding posture and the raising operation of the seedling planting apparatus. The present invention relates to a riding type rice transplanter that is supported on the traveling body so as to be able to undulate and move up and down from a rice field.
[0002]
[Prior art]
(First Prior Art) The linkage between the lock fitting for locking the drawing marker in the storage position and the lock switching tool for releasing the locked state of the lock fitting is as follows. In other words, the raising and lowering operation lever (40) for switching and setting the seedling planting device to the ascending operation state, the neutral stop state, the descending operation state, and the planting state with respect to the traveling machine body by swinging in the front-rear direction is provided. An angle-shaped slider slidable left and right to constitute a lock switching tool for switching a lock fitting (35L or 35R) for locking the drawing marker (5L, 5R) in the storage position between a locked state and an unlocked state. (50) was provided. The slider (50) is provided with a pair of left and right contact portions (50L, 50R), and the slider (50) moves in the left and right opposite directions by operating the lifting / lowering operation lever (40) to the left or right at the planting position. Then, one contact portion (50L, 50R) contacts the lock fitting (35L or 35R) to switch to the unlocked state (for example, see Patent Document 1).
(Second Prior Art) The lock fittings (35L, 35R) are arranged near the lifting / lowering operation lever (40), and are linked to the drawing marker (5L or 5R) via the wire mechanism (32L, 32R). The lock locking pieces (33L, 33R) are arranged close to engage with the lock fittings (35L, 35R).
(Third Prior Art) A spring (31) for urging the drawing marker (5L, 5R) to the grounding action posture is provided so as to be exposed outside a frame supporting the drawing marker (5L, 5R). (For example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-11-196614 (paragraph numbers [0034], [0035] FIGS. 6, 10, 11)
[0004]
[Problems to be solved by the invention]
(First Prior Art) The slider only moves left and right, and the linking structure between the lifting operation lever that swings back and forth and the slider has to be as follows. That is, the slider (50) is provided with an engaging tool (51) having an engaging recess, and the operating arm (40a) is extended from the lifting / lowering operating lever (40) toward the engaging tool (51), and the lifting / lowering operation is performed. The operation arm (40a) is configured to engage with the engagement tool (51) in a state where the lever (40) is operated to the planting position.
With such a configuration, it is difficult to accurately engage the operating arm (40a) with the engaging tool (51) in a state where the lifting operation lever (40) is operated to the planting position. The operation feeling was not good because the state was not sufficient.
[0005]
(Second Prior Art) Since the lock fitting does not directly act on the drawing marker, and the drawing marker is set in the storage position, the wire mechanism is maintained in the storage position by the tension of the wire mechanism. If the mechanism is loosened, the storage posture fluctuates, which is not a preferable phenomenon.
(Third Prior Art) In addition, since the coil spring is exposed, there is a problem that foreign substances are easily inserted.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to make it possible to smoothly link a lifting operation lever and a lock switching tool, and to avoid inconvenience due to the appearance of a spring that biases a drawing marker to a ground action posture.
[0007]
[Means for Solving the Problems]
〔Constitution〕
The feature configuration of the invention according to claim 1 is that in the riding type rice transplanter described at the beginning, the seedling planting device is mounted on the traveling machine body in an up operation state, a neutral stop state, a down operation state, and a planting state. A lifting / lowering operation lever for switching and setting to the attached state; and a lock fitting for locking the drawing marker in the storage position and a lock switching tool for switching the lock fitting between a locked state and an unlocked state. In conjunction with the operation of switching the operating lever to each of the above-described operating states, the lock switching tool is integrally moved to follow the link, and the lock switching tool can be switched to the unlocked state by the lifting operation lever. The effects are as follows.
[0008]
[Action]
Even if the lifting / lowering operation lever operates to set each operation state, the lock switching tool moves following, so that the positional relationship between the lifting / lowering operation lever and the lock switching tool does not change. Therefore, regardless of the operation position of the lifting operation lever, the positional relationship with the lock switching tool is constant, so that the operation on the lock switching tool can be performed without discomfort.
[0009]
〔effect〕
The linkage between the elevating operation lever and the lock switching tool does not change, the operation on the lock switching tool can be performed smoothly, and malfunction of the lock fitting can be avoided.
[0010]
〔Constitution〕
According to a second aspect of the present invention, in the invention according to the first aspect, a locking operation of linking each of the left and right drawing markers to the lock switching tool and displaying the planting operation state. Only in the position, by operating the lock switching tool in the forward or reverse direction by operating the lift operation lever in the unlock operation direction different from the switching operation direction in the forward or reverse direction, the one of the left and right lock brackets is selectively operated. It is configured to switch to the unlocked state, and its operation and effect are as follows.
[0011]
[Action]
Even when the elevating operation lever is operated to the planting operation position, the positional relationship between the lock switching tool and the elevating operation lever does not change, so that the elevating operation lever is different from the switching operation direction at the planting operation position. By performing one of the forward and reverse operations in the lock release operation direction, one of the left and right lock fittings to be released can be selected to perform the lock release operation.
[0012]
〔effect〕
In this way, even when the lifting operation lever is operated in the direction different from the switching operation direction in the unlocking operation direction in the planting operation position, the lifting operation lever and the lock switching tool always have a fixed positional relationship. Since it is maintained, the unlock operation can be performed smoothly and quickly.
[0013]
〔Constitution〕
A feature of the invention according to claim 3 is that, in the invention according to claim 1 or 2, a lock switching tool integrally attached to the same pivot axis position as the lifting / lowering operation lever; The left and right lock fittings arranged close to the swing fulcrum of the left and right line drawing marker slidably attached are linked by a wire mechanism, and the operation and effect are as follows.
[0014]
(Function and effect)
A configuration in which the lock fitting is arranged near the drawing marker and the lock fitting is made to directly act on the drawing marker and the drawing marker is set in the storage posture can be adopted, so that a stable storage posture can be maintained and the lock fitting can be maintained. Since the lock mechanism and the lock switching tool are linked by a wire mechanism, there are few restrictions on the wiring position of the wire mechanism, and a link structure can be easily constructed.
[0015]
〔Constitution〕
A feature of the invention according to claim 4 is that, in the invention according to any one of claims 1 to 3, the drawing marker is used for work in a support frame that swingably supports the drawing marker. The advantage of the present invention resides in that a spring for biasing to the grounding posture is housed, and its operation and effect are as follows.
[0016]
(Function and effect)
Since a spring is provided in the support frame that supports the drawing marker, the spring does not come out to the front side of the frame, and no foreign matter or the like in the field scene is pinched. In addition, since the support frame for supporting the drawing marker is used as a cover for the spring, there is no need to provide a dedicated cover.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an overall side view of a riding rice transplanter for four-row planting. In this riding type rice transplanter, the seedling planting device 2 is connected to the front of the traveling body 1 via a control handle 5 and the driver's seat 3 via a lifting link mechanism 6 so as to be movable up and down. A fertilizer application device 7 is provided at the rear, and a drawing marker 4 that forms an index of the next planting process on the rice field is provided on both left and right sides of the seedling planting device 2.
[0018]
The raising / lowering operation structure of the seedling planting apparatus 2 will be described. As shown in FIGS. 3 and 4, an elevating operation lever 8 is provided on the right side of the operation handle 5. When the elevating operation lever 8 is rocked along the guide guide groove a, the seedling planting device 2 runs. The body 1 can be operated in an ascending operation state, a neutral stop state, a descending operation state, and a planting state. An elevating control valve 9 is linked to the elevating operation lever 8 by an interlocking mechanism. The elevating link mechanism 6 is driven up and down by a lifting hydraulic cylinder 10 which receives and pressurizes hydraulic oil from the elevating control valve 9 to extend. Then, the seedling planting device 2 is moved up and down.
The elevating operation lever 8 is switched to an ascending operation position U, a neutral stop position N, a descending operation position D, and a planting operation position in which the operating state is set by swinging back and forth. By being operated, the left and right delineation markers 4 can be switched to the grounding action posture.
[0019]
The structure of the left and right delineation markers 4 will be described. As shown in FIGS. 5 and 6, a feed case 11 for receiving planting power from the traveling machine body 1 is supported at the lower end of the vertical link 6 </ b> A at the rear end of the elevating link mechanism 6 so as to freely perform rolling. A rectangular pipe-shaped support frame 12 extends from left to right from 11. A round pipe 13 is extended from the left and right ends of the support frame 12, and a drawing marker 4, a lock fitting 14 for maintaining the drawing marker 4 in a stored position, and a biasing of the drawing marker 4 to the grounding position are provided on the round pipe 13. A coil spring 15 and the like are mounted.
[0020]
As shown in FIGS. 6 and 8, a channel-shaped bracket 13A is fixed to the distal end of the round pipe 13, and the base end mounting plate 4A of the drawing marker 4 is attached to the bracket 13A via a fulcrum pin 16 facing forward and backward. It is attached to be able to swing up and down around the fulcrum pin 16. A locking pin 17 for locking is erected along the fulcrum pin 16 with respect to the base end mounting plate 4A, and the round bar-shaped main body 4B of the drawing marker 4 is inserted and fixed to the locking pin 17. The base mounting plate 4A and the round bar-shaped main body 4B rotate integrally. A locking recess 4C is formed at the lower end of the base end mounting plate 4A, and the coil spring 15 is locked in the locking recess 4C to urge the drawing marker 4 to the ground action posture.
[0021]
The coil spring 15 is housed in the round pipe 13 and can prevent foreign substances and the like from being caught in the coil spring 15. As described above, since the coil spring 15 is housed in the round pipe 13, there is little clogging with foreign matter and the like between the round float 13 and the coil spring 15 compared to the case where the coil spring 15 is provided outside the round pipe 13. Therefore, the swing angle of the side float itself can be made large. Further, since the coil spring 15 is not provided outside the round pipe 13, it can be secured as a space for installing other devices.
[0022]
A support pin 18 is erected on the bracket 13A in a state parallel to the fulcrum pin 16 supporting the drawing marker 4, and the lock metal 14 is rotatably supported on the support pin 18. The lock fitting 14 is urged toward the lock side by a torsion spring 19, and holds the drawing marker 4 in a stored posture by engaging with a locking locking pin 17.
[0023]
A release wire 20 for pulling up the retracted posture to the retracted position against the urging force of the coil spring 15 is linked to the base mounting plate 4A of the drawing marker 4, and the other end of the release wire 20 is connected to the lower link of the lifting link mechanism 6. 6B, the drawing marker 4 can be raised every time the seedling planting apparatus 2 is raised. The release wire 20 is provided with an outer wire 20B provided between a support bracket 13B provided on the round pipe 13 and a link bracket 6a formed on an upper end of a rear end link 6A of the elevating link mechanism 6, and slides into the outer wire 20B. It is composed of a moving inner wire 20A.
[0024]
With the above-described configuration, as shown in FIGS. 9A and 9B, when the lifting link mechanism 6 is operated to ascend during the ridge turn, the connection portion of the lower link 6B to which the inner wire ends are connected. Where the distance between the inner wire mounting portion of the base mounting plate 4A of the drawing marker 4 and the outer wire end on the round pipe is reduced by increasing the distance between the outer wire end and the rear end link 6A to which the outer wire end is mounted. , That is, from where the inner wire 20A is pulled, the drawing marker 4 is raised. When the drawing marker 4 is lifted, the locking pin 17 of the mounting base end plate 4A acts on the lock 14 and engages with the lock 14 so that the retracted posture of the drawing marker 4 is maintained.
[0025]
Next, an operation structure for the lock fitting 14 will be described. As shown in FIGS. 10 and 11, the support shaft 21 extends laterally from the side plate 5B inside the handle post 5A, and the sleeve 21A is rotatably fitted to the support shaft 21. A rotating bracket 22 having a substantially rectangular cross section is fixed to the sleeve 21A, and a base shaft portion 8A having a posture orthogonal to the support shaft 21 is inserted into the rotating bracket 22, so that the lifting operation lever 8 is supported. I have. The elevating operation lever 8 includes the base shaft portion 8A described above, a main body portion 8B bent and raised from the base shaft portion 8A, and a grip portion 8C formed at the distal end of the main body portion 8B. It is configured to be able to swing left and right with respect to the rotating bracket 22 around the axis of the portion 8A, and to swing back and forth around the axis of the support shaft 21 together with the rotating bracket 22.
[0026]
A support shaft 23 extends from the rotating bracket 22 in parallel with the base shaft portion 8A, and a lock switching tool 24 is attached to the distal end side of the support shaft 23 so as to be swingable around the support shaft 23. The drive rod 8D extends from the main body 8B of the lifting operation lever 8 in parallel with the support shaft 23, and the extended end of the drive rod 8D is engaged with the lock switching tool 24. Here, when the raising / lowering operation lever 8 is operated to be able to swing left and right around the axis of the base shaft 8A, the lock switching tool 24 swings in the operating direction.
[0027]
Next, the linkage between the lock fitting 14 and the lock switching tool 24 will be described. As shown in FIGS. 11 and 12, support pins 24A, 24A are provided toward the left and right sides from the lock switching tool 24, and each support pin 24A swings around an axis perpendicular to the support pin 24A. A U-shaped fitting 25 is attached, and the U-shaped fitting 25 and the lock fitting 14 are linked by a wire mechanism 26. That is, the U-shaped fitting 25 and the lock fitting 14 are linked by the inner wire 26A, and the inner wire 26A is held by the outer wire 26B. It should be noted that the U-shaped fitting 25 and the lock fitting 14 are linked by the wire mechanism 26 such that the left U-shaped fitting 25 is linked to the right locking fitting 14 and the right U-shaped fitting 25 is linked to the left locking fitting 14. Each is linked in a crossed state.
[0028]
The lifting operation structure will be described. As shown in FIGS. 10 and 11, the drive arm 27 extends rearward from the rotating bracket 22, and a link rod 28 is linked to the tip of the drive arm 27, and the link rod 28 is connected to the operation cam plate 29. It is linked and linked. The spool 9A of the elevating control valve 9 is urged to project toward the lowering position for setting the lowering state of the seedling planting device 2, and the spool 9A is pushed in by the cam portion 29A of the operation cam plate 29 against the urging force. When operated, the elevation control valve 9 is switched between a neutral position where the neutral stop state of the seedling planting device 2 appears and an elevation position where the elevation state appears. The elevation control based on the grounding sensor will not be described in detail, but the center float 30A in the leveling float is supported so as to be able to swing up and down around the rear fulcrum, and the ground pressure is maintained regardless of the ground pressure fluctuation of the center float 30A. Refers to control for raising and lowering the seedling planting apparatus 2 so as to maintain the attitude of the center float 30A at the reference attitude so as to maintain a constant.
[0029]
As described above, by linking the lifting operation lever 8 and the left and right drawing markers 4, 4, the following operating state is obtained. As shown in FIGS. 10 and 11, when the elevating operation lever 8 is set to the elevating operation position U, the cam portion 29A of the operation cam plate 29 pushes the spool 9A to set the spool 9A to the elevating position U. . When the elevating operation lever 8 is operated to the neutral position N from this state, the cam portion 29A swings in a direction away from the spool 9A to allow the spool 9A to project, and the elevating control valve 9 appears in the neutral state. In this case, the rotating bracket 22 swings around the support shaft 21 by the swinging movement of the lifting operation lever 8 to the neutral position, but the lock switching tool 24 supported by the rotating bracket 22 via the support shaft 23. Also swings together. Therefore, there is no change in the positional relationship between the drive rod portion 8D and the lock switching tool 24.
[0030]
As shown in FIG. 12, when the elevating operation lever 8 is operated from the neutral stop position N to the lowering position D, the spool 9A protrudes by the urging force, and the elevating control valve 9 appears in the lowering state. Further, when the elevating operation lever 8 is operated to the planting position, the elevating control valve 9 is linked to the center float 30 and shifts to elevating control. As described above, there is no change in the positional relationship between the drive rod portion 8D and the lock switching tool 24 by the swinging movement of the lifting operation lever 8.
As shown in FIG. 13, when the elevating operation lever 8 is operated in one of the left and right directions around the axis of the base shaft 8A in a state where the elevating operation lever 8 is operated at the planting position, the driving rod 8D is driven. By the operation, the lock switching tool 24 swings around the support shaft 23 in the swing direction of the elevating operation lever 8. Then, the left and right U-shaped brackets 25, 25 swing together with the left and right support pins 24A, 24A attached to the lock switching tool 24. That is, when the elevating operation lever 8 is swung to the right, the right U-shaped bracket 25 is lowered and the left U-shaped bracket 25 is pulled up, and the left U-shaped bracket 25 connects the inner wire 26A. Pull the right lock fitting 14 away from the locking pin 17. Accordingly, the unlocked right-side drawing marker 4 is switched to the grounding action posture by the urging force of the coil spring 15. When the raising / lowering operation lever 8 is swung leftward, the left drawing marker 4 is switched to the ground action posture.
The pressed U-shaped bracket 25 on the opposite side does not operate the lock bracket 14 in the unlocking direction due to the loosening of the inner wire 26A or 26B.
[Brief description of the drawings]
FIG. 1 is an overall side view of a riding type rice transplanter. FIG. 2 is an overall plan view of a riding type rice transplanter. FIG. 3 is a side view showing an operation linking mechanism of an elevation operation lever. FIG. FIG. 5 is a front view showing an attached state of the drawing marker. FIG. 6 is a plan view showing an attached state of the drawing marker. FIG. 7 is an enlarged plan view of an attaching portion of the drawing marker. FIG. FIG. 9 is a front view showing a state in which the posture is switched between a posture and a stowed posture. FIG. 9 is a side view showing a linkage structure between a lifting link and a lock bracket for a drawing marker. FIG. 10 is a front view showing a linkage structure between a lifting operation lever and a drawing marker. FIG. 11 is a side view showing a state where the elevating operation lever is operated to the ascending position. FIG. 12 is a side view showing a state where the elevating operation lever is operated to the descending position. FIG. 13 is setting the elevating operation lever to the planting position. Lock on the right To release a front view showing a state in which switching the drawn marker action posture EXPLANATION OF REFERENCE NUMERALS
DESCRIPTION OF SYMBOLS 1 Traveling body 2 Seedling planting apparatus 4 Drawing marker 8 Elevating operation lever 12 Support arm 14 Lock metal 15 Spring to be urged 24 Lock switching tool 26 Wire mechanism

Claims (4)

The seedling planting device is connected to the traveling machine so as to be able to move up and down, and a drawing marker that forms the index of the next planting process is formed on the rice field from the rice field in conjunction with the working grounding posture and the raising operation of the seedling planting device. A riding type rice transplanter that is supported by the traveling body so as to be able to undulate and rise in a retracted posture,
The seedling planting device is provided with an up / down operation lever for switching and setting the traveling machine body to an up operation state, a neutral stop state, a down operation state, and a planting state, and the drawing marker is locked in the storage position. And a lock switch that switches the lock between a locked state and an unlocked state. The lock switch is integrated with the switching operation of the elevating operation lever to each of the operating states. A riding type rice transplanter configured to be able to follow and move a lock switching tool to an unlocked state by the lifting operation lever. The lock hardware of each of the left and right drawing markers is linked to the lock switching tool, and the lifting operation lever is unlocked differently from the switching operation direction only at the planting operation position where the planting operation state appears. 2. A riding type rice transplanter according to claim 1, wherein the lock switching tool is operated in one of forward and reverse directions by a forward / reverse operation in a direction to selectively switch the one of the right and left lock fittings to an unlocked state. . A lock switching tool integrally attached to the same pivot axis position as the lifting / lowering operation lever, and a rocking fulcrum of a left and right drawing marker slidably attached to the seedling planting device, respectively. The riding type rice transplanter according to claim 1 or 2, wherein the right and left lock fittings are linked by a wire mechanism. 4. The support frame according to claim 1, wherein a spring that urges the drawing marker to a working ground posture is housed in a support frame that swingably supports the drawing marker. Riding rice transplanter.

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