JP3540870B2 - Rice transplanter - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a pair of left and right line markers that form a travel line serving as a travel index in the next step on a mud surface of a field along with seedling planting work, and the tip of the line marker protrudes laterally to the machine body and enters the mud surface of the field. Operating lever that is capable of switching between a non-operative position and a non-operative position approaching to the side of the aircraft greatly away from the mud surface in the field, and instructing each line marker to switch from the non-operation position to the operation position. A rice transplanter provided with
[0002]
[Prior art]
Conventionally, in such a rice transplanter as described above, for example, as disclosed in Japanese Patent Application Laid-Open No. Hei 7-31231, a pair of left and right line markers and a seedling planting device are connected by wires to plant seedlings. When the ascending operation of the apparatus to a predetermined height is performed, each line marker is switched from the working posture to the non-working posture by a pulling operation of the operation wire accompanying the operation, and the non-working posture of each line marker is configured. By providing a lock mechanism for holding each line marker in the non-operative position in accordance with the switching to the operation, the pulling operation of the operation wire is released, and the seedling planting device is lowered to the seedling planting operation height. And a spring for biasing the pair of left and right line markers toward the working position, and a non-working state of each line marker. An operating lever for instructing switching from the force to the operating position, and releasing means for releasing the line marker from being held in the non-operating position by the lock mechanism on the side corresponding to the instruction based on the instruction from the operating lever. At the height of the seedling planting operation of the seedling planting device in which the pulling operation of the operation wire is released, when the switching of the line marker to the working posture is instructed by the swing operation of the operation lever, the locking mechanism according to the operation direction. , The line marker corresponding to the operation direction of the operation lever is switched from the non-operation position to the operation position.
[0003]
[Problems to be solved by the invention]
However, according to the above-described conventional technology, when the seedling planting device is in a lowered state, a simple swing operation in one direction of the operation lever causes the lock mechanism on the side according to the operation direction to set the line marker. Since the holding in the non-operating position is automatically released, for example, during a seedling planting operation or during a maintenance operation with the seedling planting device lowered, a part of the worker's body or Even if the operation lever is unexpectedly operated due to contact with another object, the lock mechanism corresponding to the operation direction is released and the tip end approaches the lateral side of the aircraft by the lock mechanism. There is an inconvenience that the held line marker is switched to a state in which the line marker is protruded to the side of the aircraft, and the inconvenience causes the line marker to be in contact with a ridge or another object. It is corrupted by, or there is a possibility that inconvenience such as accidentally pushing the already Uenae caused by line marker.
[0004]
An object of the present invention is to minimize an operation error of an operation lever due to contact of a part of a worker's body or another object, or an operation of switching a line marker to an unexpected action posture due to the erroneous operation. An object of the present invention is to minimize damage to a line marker due to contact with a ridge or another object, which may occur when the marker is unexpectedly switched to the action posture side, or to push down a planted seedling by the line marker.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, one of a pair of left and right line markers that have been switched to a non-operating posture by a lateral operation from a neutral position corresponds to the operation direction. A cross swing type operation lever for instructing switching of the line marker to the action posture, and the neutral position is displaced in a vertical direction from an intersection of each operation direction of the operation lever.
[0006]
According to the first aspect of the present invention, since the neutral position of the operation lever is displaced in the vertical direction from the intersection of each operation direction of the operation lever, the operation direction for instructing the switching of the line marker to the action posture is provided. The operation of the operation lever in the horizontal direction is restricted unless the operation lever is operated up and down to a position where the operation lever can be operated in the horizontal direction. That is, since the operation lever is restricted from being operated in the lateral direction when in the neutral position, the operation lever can be prevented from being erroneously operated in the lateral direction due to contact with a part of the worker's body or another object. Accordingly, the switching operation of the line marker to the unexpected operation posture can be prevented.
[0007]
Therefore, it is possible to avoid breakage of the line marker due to contact with ridges or other objects, which may occur when the line marker is unexpectedly switched to the working posture side, or pushing down of the already planted seedling by the line marker.
[0008]
In the invention according to claim 2 of the present invention, an operation lever for operating a line marker is provided near the operation handle, and the operation lever can be switched to the non-operation position by operating the operation lever from the neutral position to the lateral direction. Of the pair of left and right line markers, the switch to the operation posture of the line marker according to the operation direction is configured to be instructed by an output signal from the control device , and one of the left and right line markers is set to the operation posture. In some cases, the switching to the working posture of the other line marker based on the command from the operation lever is prevented until a switching command to the non-working posture for the one line marker in the working posture is output. There is a structural feature in that a control means is provided in the control device .
[0009]
According to the second aspect of the present invention, during the seedling planting operation while one of the line markers is switched to the working posture, the other line marker is erroneously operated due to an erroneous operation of the operation lever due to contact with a part of the worker's body or another object. Even if a command is issued to switch to the action posture of the other line marker, the switch to the action posture of the other line marker can be prevented by the action of the restricting means.
[0010]
Therefore, the other line marker may be damaged due to contact with ridges or other objects that may occur when the other line marker is switched to the acting position during the seedling planting operation while one of the line markers is switched to the acting position. It is now possible to avoid pushing down existing seedlings by the line marker.
[0011]
In the invention according to claim 3 of the present invention, of the pair of left and right line markers switched to the non-operating posture by the lateral operation from the neutral position, the operating position of the line marker according to the operating direction is changed to the operating posture of the line marker. An operation lever for instructing the switching of the operation lever is provided, and the operation lever is configured to be elastically bent and deformable within a predetermined range.
[0012]
According to the third aspect of the present invention, the operation lever is configured to be elastically bendable and deformable within a predetermined range. Since the operation is absorbed by the elastic bending deformation of the operation lever, erroneous operation of the operation lever due to contact with a part of the worker's body or another object can be prevented as much as possible. The switching operation to the unexpected action posture can be prevented as much as possible.
[0013]
Therefore, breakage of the line marker due to contact with ridges or other objects, which may occur when the line marker is unexpectedly switched to the working posture side, and pushing down of the already planted seedling by the line marker can be avoided as much as possible.
[0014]
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 type rice transplanter. This rice transplanting machine is a riding type traveling machine body 4 provided with a pair of left and right front wheels 1 and rear wheels 2 and a control unit 3. At the rear part, a seedling platform 5 for placing mat-shaped seedlings in a plurality of rows, a planting mechanism 6 for cutting seedlings from the mat-shaped seedlings on the seedling platform 5 and planting them in a field, and planting seedlings by the planting mechanism 6 A seedling planting device 8 provided with a leveling float 7 and the like for leveling the site is connected via a parallel quadruple link mechanism 9 so that it can be driven up and down by operating a hydraulic lift cylinder 10. It is constituted by.
[0015]
As shown in FIG. 1 to FIG. 4, a pair of left and right line markers 11 that form a traveling line serving as a traveling index in the next step on the muddy surface of the field with the seedling planting operation traveling is formed at the front of the traveling machine body 4. Equipped. Each of the line markers 11 includes a first arm 13 pivotally attached to a support frame 12 disposed on both left and right lateral sides of a front portion of the traveling body 4 so as to be swingable about a vertical axis P1, and a free end of the first arm. The second arm 14 pivotally pivoted about the oblique axis P2, and the first arm 13 and the second arm 14 are aligned with each other in a straight line. As described above, the third arm 15 attached to the free end of the second arm 14 and the like.
[0016]
The configuration of the line marker 11 will be described in detail. The first arm 13 is in a state where its free end is located on the front side of the traveling machine body 4 by the first coil spring 16 erected over the support frame 12 and the first arm 13. It is urged in the direction as follows. Further, the free end of the first arm 13 is attached to the traveling body 4 against the bias of the first coil spring 16 by engaging with the locking plate 17 provided on the support frame 12. The lock lever 18 is provided in a state of extending from the first arm 13 toward the control section 3 to hold the lever 18 in a posture of protruding laterally. When the locking lever 18 is operated to release the engagement between the locking lever 18 and the locking plate 17, the first arm 13 is biased by the first coil spring 16 to move the front side of the traveling machine body 4. Thus, the vehicle body 4 is held in a posture along the front-rear direction. The second arm 14 is urged by a second coil spring 19 spanned between the first arm 13 and the second arm 14 in a direction in which the second arm 14 is aligned with the first arm 13. Further, the second arm 14 is linked to the parallel quadruple link mechanism 9 via the operation wire 20, and the operation wire 20 is pulled in accordance with the operation of raising the seedling planting device 8 to a predetermined height. The free end of the second coil spring 19 is switched to the upright position, which is located above, against the bias of the second coil spring 19. Between the parallel quadruple link mechanism 9 and the operation wire 20, an interlocking link mechanism 21 having a flexible portion 21a is interposed, and the operation wire 20 is moved up and down within a predetermined range of the seedling planting device 8. It is not operated by operation. A lock mechanism L is provided between the second arm 14 and the operation wire 20 to hold the second arm 14 in the upright posture even when the pulling operation of the operation wire 20 is released by the descending operation of the seedling planting device 8. Is equipped. The lock mechanism L links the second arm 14 with the operation wire 20 and engages with the engagement portion 22a when the second arm 14 is in the upright posture while the linkage rod 22 is formed with a concave engagement portion 22a. The engagement fitting 24 urged by the third coil spring 23 in a state where the engagement is held, and the linkage rod 22 are slidably supported in the longitudinal direction and the engagement fitting 24 is vertically slidable. A support bracket 25 extends upward from the first arm 13 so as to pivot. The support bracket 25 is equipped with an electromagnetic solenoid 26 that operates the engagement fitting 24 in a direction to release the engagement with the engagement portion 22a against the bias of the third coil spring 23.
[0017]
That is, the line marker 11 is moved by the operation of the locking lever 18 from the control unit 3 so that the first arm 13 is moved in the front-rear direction of the traveling machine body 4 on the front side of the traveling machine body 4 as shown by a dashed line in FIG. 2 and FIG. 3 and a working posture B in which the tip of the first arm 13 projects laterally of the traveling body 4 as shown by a solid line in FIGS. ing. In the working posture B, the raising operation of the seedling planting device 8 to a predetermined height causes the second arm 14 to stand up as shown by a two-dot chain line in FIGS. Is switched to the non-operation position C, which approaches the lateral side of the machine body while largely separating from the mud surface of the field, and the unlocking operation of the lock mechanism L in a state where the seedling planting device 8 is positioned at the seedling planting work height causes 2 and FIG. 3, the second arm 14 projects so as to be aligned with the first arm 13 so as to be aligned with the first arm 13 so that the tip end of the third arm 15 can be switched to the working posture D in which the tip of the third arm 15 enters the field mud surface. ing.
[0018]
As shown in FIGS. 1 and 5, the raising and lowering operation of the seedling planting device 8 and the releasing operation of each lock mechanism L are performed by operating levers provided on the right side of the control handle 27 provided in the control section 3. This is performed based on a command from the control unit 28. The operation lever 28 is configured as a cross-return type neutral return type that can be reciprocated in a vertical direction (longitudinal direction) and a front-rear direction (an example of a lateral direction). A lever switch 28a for detecting the swing operation of the vehicle body is provided, and each command corresponding to the operation direction is output to the control device 29 mounted on the traveling machine body 4. The control device 29 is configured to execute a control operation based on the command when the command is input from the operation lever 28.
[0019]
More specifically, the operation lever 28 performs an upward swing operation, and when the operation is detected by the lever switch 28a, outputs an upward command to the control device 29 to raise the seedling planting device 8 to a predetermined height. When the first swing operation is performed downward and the operation is detected by the lever switch 28a, a lowering command for lowering the seedling planting device 8 to the seedling planting work height is output to the control device 29, and the downward movement is performed. When the second swing operation is performed, and the operation is detected by the lever switch 28a, a planting start command to start the planting operation by the planting device 8 is output to the control device 29. Further, when the swinging operation is performed forward and the operation is detected by the lever switch 28a, a left marker operation command for switching the left line marker 11 from the non-operation position C to the operation position D is output to the control device 29, When the swinging operation is performed backward and the operation is detected by the lever switch 28a, a right marker operation command for switching the right line marker 11 from the non-operation position C to the operation position D is output to the control device 29. ing.
[0020]
On the other hand, when an ascending command is input from the operation lever 28, the control device 29 controls the operation of the clutch motor 30 to disconnect the planting clutch 31 that interrupts transmission from the traveling machine body 4 to the seedling planting device 8. By performing the operation, the seedling planting operation of the seedling planting apparatus 8 is stopped, and after the stoppage, the operation of the electromagnetic control valve 32 for switching the flow state of the hydraulic oil to the lift cylinder 10 is controlled to operate the seedling planting apparatus 8. When the descending command is input from the operation lever 28, the descending operation for controlling the operation of the electromagnetic control valve 32 to descend the seedling planting device 8 to the seedling planting work height is performed. When the planting start command is input from the operating lever 28, the operation of the planting clutch 31 for controlling the operation of the clutch motor 30 to start the planting operation of the planting device 8 is started. It is adapted to perform. Further, when a left marker operation command is input from the operation lever 28, the operation of the left electromagnetic solenoid 26 is controlled to release the left lock mechanism L for switching the left line marker 11 to the operation posture D. When a right marker operation command is input from the operation lever 28, the operation of the right electromagnetic solenoid 26 is controlled to release the right lock mechanism L for switching the right line marker 11 to the operation posture D. ing. The switching operation of each line marker 11 from the working posture D to the non-working posture C is performed in conjunction with the raising operation of the seedling planting device 8 to the predetermined height, as described above. . Reference numeral S shown in FIG. 5 is an angle sensor composed of a rotary potentiometer that detects the operation angle of the parallel quadruple link mechanism 9.
[0021]
As shown in FIGS. 6 and 7, the neutral position N of the operation lever 28 is displaced downward from the intersection X of each operation direction of the operation lever 28, and the swing operation from the neutral position N in the front-rear direction is not performed. Before that, the operation cannot be performed unless the operation lever 28 is once pushed up to the intersection X in each operation direction. That is, in the neutral position N, the swinging operation of the operation lever 28 in the front-rear direction, which is the operation direction instructing the switching of each line marker 11 to the operation posture D, is restricted, and the operator's body is Erroneous operation in the front-rear direction due to contact with a part or another object is prevented. With this configuration, it is possible to prevent the line marker 11 from being unexpectedly switched from the non-operation position C to the operation position D, so that the line marker 11 is unexpectedly switched to the operation position D. It is possible to avoid damage to the line marker 11 due to contact with ridges or other objects that may occur, or pushing down of the already planted seedlings by the line marker 11.
[0022]
[Another embodiment]
Hereinafter, another embodiment of the present invention will be described.
{Circle around (1)} As shown in FIG. 8, by switching the neutral position N of the operation lever 28 upward from the intersection X of each operation direction of the operation lever 28, a command to switch each line marker 11 to the action posture D is issued. The swing operation in the front-rear direction, which is the operation direction, may be restricted to prevent an erroneous operation in the front-rear direction due to contact with a part of the body of the worker or another object.
[0023]
{Circle around (2)} Instead of a configuration in which the neutral position N of the operation lever 28 is displaced in the vertical direction from the intersection X of each operation direction of the operation lever 28, if one of the left and right line markers 11 is in the action posture D, A configuration may be provided in which a restricting means 29A for preventing switching of the other line marker 11 to the action posture D based on a command from the operation lever 11 is provided.
[0024]
The configuration of the restricting means 29A will be described. As shown in FIG. 5, the restricting means 29A is provided as a control program in the control device 29. As shown in the flowchart of FIG. It is determined whether an operation command or a right marker operation command has been issued [Step # 1]. If a left marker operation command or a right marker operation command has been issued from the operation lever 28, a flag is set at that time. Is determined (step # 2), and if the flag is not set, the action of the line marker 11 on the side corresponding to the command by the control operation of the control device 29 based on the command from the operation lever 28 is performed. A switching operation to the posture D is executed [Step # 3], and a flag is set accordingly (Step # 4). If the flag has already been set in step # 2, execution of the switching operation of the line marker 11 on the side corresponding to the command by the control operation of the control device 29 based on the command from the operation lever 28 to the action posture D is performed. [Step # 5]. If a left marker operation command or a right marker operation command has not been issued from the operation lever 28 in step # 1, it is determined whether an ascending command has been issued from the operation lever 28 (step # 6). When the ascent command is issued from the controller, the non-active posture C of the line marker 11 performed in conjunction with the ascent operation of the seedling planting device 8 to the predetermined height by the control operation of the control device 29 based on the command. The system is configured to execute a series of control operations such as resetting the flag in accordance with the switching operation to [Step # 7].
[0025]
That is, with the above configuration, during the seedling planting operation in which one of the line markers 11 is switched to the action posture D, the other line marker 11 is erroneously operated due to an erroneous operation of the operation lever 28 due to contact with a part of the worker's body or another object. Even if a command to switch to the working posture D is issued, the switching operation of the other line marker 11 to the working posture D can be prevented, whereby the seedling in which one line marker 11 is switched to the working posture D can be prevented. Damage to the other line marker 11 due to contact with ridges or other objects that may occur when the other line marker 11 is switched to the action posture D during the planting work, or pushing down of the already planted seedling by the other line marker 11 Can be avoided.
[0026]
In this configuration, instead of the cross swing type operation lever 28, a pair of operation levers 28 configured to be swingable only in the vertical direction or the horizontal direction may be provided.
[0027]
{Circle around (3)} Instead of displacing the neutral position N of the operation lever 28 in the vertical direction from the intersection X of each operation direction of the operation lever 28, as shown in FIG. May be configured to be elastically bendable and deformable within a predetermined range. Reference numeral 33 in FIG. 10A denotes a coil spring that allows elastic bending deformation of the operation lever 28 within a predetermined range in the cross direction. Reference numeral 34 in FIG. 10B denotes a leaf spring that allows elastic bending deformation of the operation lever 28 within a predetermined range only in the lateral direction (marker operation command direction).
[0028]
That is, according to the above configuration, an operation within a predetermined range due to contact with a part of the worker's body or another object is absorbed by the elastic bending deformation of the operation lever 28, so that the worker's body can be absorbed. An erroneous operation of the operation lever 28 due to contact with a part or another object can be prevented as much as possible, whereby the switching operation of the line marker 11 to the unexpected action posture D can be prevented as much as possible. Can be avoided as much as possible, such as breakage of the line marker 11 due to contact with ridges or other objects or pushing down of the already planted seedlings by the line marker 11, which may occur due to unexpected switching to the acting posture D side.
[0029]
Incidentally, also in this configuration, instead of the cross swing type operation lever 28, a pair of operation levers 28 configured to be swingable only in the vertical direction or the horizontal direction may be provided.
[0030]
Incidentally, reference numerals are written in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.
[Brief description of the drawings]
FIG. 1 is an overall side view of a riding type rice transplanter. FIG. 2 is a plan view of a left front portion of the riding type rice transplanter showing a configuration of a line marker. FIG. 3 is a front view of a riding type rice transplanter left front portion showing a configuration of a line marker. FIG. 4 is a linkage diagram showing a configuration of a line marker and linkage with a parallel quadruple link mechanism. FIG. 5 is a block diagram showing a control configuration. FIG. 6 is a control handle showing a relationship between an operation direction of an operation lever and a neutral position. 7 is an operation lever diagram showing the relationship between the operation direction of the operation lever and the neutral position. FIG. 8 is an operation lever showing the relationship between the operation direction of the operation lever and the neutral position in another embodiment. FIG. 9 is a flowchart showing a control operation of a regulating means in another embodiment. FIG. 10 is a perspective view showing a configuration of an operation lever in another embodiment.
11 Line marker 28 Operating lever 29A Restriction means C Non-operating posture D Working posture N Neutral position X Intersection

Claims (3)

Of the pair of left and right line markers (11) switched from the neutral position (N) to the non-operative posture (C) by the lateral operation, the operational posture (D) of the line marker (11) according to the operation direction ), And a neutral position (N) is displaced in a vertical direction from an intersection (X) of each operation direction of the operation lever (28). Rice transplanter. An operation lever (28) for operating a line marker is provided near the operation handle (27),
Of the pair of left and right line markers (11) switched to the non-operative position (C) by the lateral operation of the operation lever (28) from the neutral position (N), the line marker corresponding to the operation direction The switch to the operation posture (D) of (11) is configured to be instructed by an output signal from the control device , and
When one of the left and right line markers (11) is in the working posture (D), switching to the working posture (D) of the other line marker (11) based on a command from the operation lever (28) is performed. A rice transplanter equipped with a control means (29A) provided in the control device for preventing the one line marker (11) in the operation posture (D) from being switched to the non-operation posture (C) for the one line marker (11); . Of the pair of left and right line markers (11) switched from the neutral position (N) to the non-operative posture (C) by the lateral operation, the operational posture (D) of the line marker (11) according to the operation direction The rice transplanter is provided with an operation lever (28) for instructing the switching to the operation lever (28), and configured such that the operation lever (28) can be elastically bent and deformed within a predetermined range.

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