JPH0856419A - Rice transplanter - Google Patents

Abstract

PURPOSE: To change the posture of a drawing marker 4 to the housing posture side without bringing out breakage of a lock mechanism, etc., for retaining a drawing marker to drawing action posture not by only change over operation of a planting clutch from connected state from disconnected state, but also by manual operating lever, when the posture of the marker 4 is changed over from drawing posture to housing posture. CONSTITUTION: An operating arm 8 operated in interlocking with manual operating lever 5 is provided in a supporting shaft 43 of a drawing marker 4 to interlock the arm 8 with the drawing marker 4 and a lock releasing cam part 9 with which an operating arm 8 interferes is provided in a cam plate 65 of a lock mechanism and lock of the drawing marker 4 due to the cam plate 65 can be released by interference of the operating arm 8 to the lock release cam part 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice transplanter, and more specifically, to a posture in which a wire drawing marker is projected in the widthwise direction of the machine body and a posture in which the wire marker is housed on the machine body side can be changed.
A lock mechanism for locking the drawing marker in the drawing action posture, and a lock releasing mechanism for releasing the locking mechanism to change the posture of the drawing marker to the storage posture when the planting clutch is turned on and off. Rice transplanter equipped with.

[0002]

2. Description of the Related Art Conventionally, in rice transplanters, drawing markers are supported on both sides in the width direction of the machine body so that the drawing markers can be changed between a drawing working attitude and a retracted attitude, and each of these drawing markers is provided on the machine body. In addition to interlocking with the manual operation lever via a connecting member, a lock mechanism that locks each of the drawing markers in the drawing action posture on the machine body side, and unlocks by the lock mechanism to perform each of the drawing markers A lock release mechanism for changing the drawing action posture to the storage posture is provided. The lock mechanism is provided with a cam plate having an engaging portion that is swingably supported on the machine body side and that can receive a locking member provided on the wire drawing marker side. It is configured to engage the locking member to lock the drawing marker in the drawing action posture, and further, as the unlocking mechanism, the cam plate of the locking mechanism, to the seedling planting portion. When connecting a connecting member such as a wire that interlocks with the clutch lever of the planting clutch that transmits and cuts off the power of the planting clutch and shuts off the power to the seedling planting unit with the clutch lever, it is interlocked with the clutch lever. The drawing action posture of the drawing marker by the cam plate is released to automatically return to the storage posture.

During seedling planting work by a rice transplanter, the drawing marker is manually projected to the drawing action posture, and a locking member provided on the drawing marker is attached to the engaging portion of the cam plate. By engaging the wire drawing marker in the wire drawing action posture, when performing the seedling planting work in the seedling planting section while reciprocating the machine body in the field, the wire at the time of the forward movement. A mark can be added to the soil surface of the field by the drawing marker held in the pulling posture. Therefore, by running the machine along the mark during the backward movement, it is possible to maintain the seedling planting row by the seedling planting unit at a predetermined interval when the machine reciprocates. Further, when the line drawing marker is not needed such as when the seedling planting work is completed, the clutch lever of the planting clutch is operated from the on-side to the off-side, thereby the clutch lever and the cam plate of the lock mechanism. The cam plate via the connecting member interposed between
By swinging the engaging portion in the direction in which it is disengaged from the locking member of the wire drawing marker and releasing the lock,
The drawing marker can be automatically returned from the drawing working posture to the stored posture by a spring or the like.

[0004]

However, according to the above conventional structure, the cam plate and the clutch lever are connected by the connecting member and the lock is released by the disengagement operation of the clutch lever. , Once the wire drawing marker is in a projecting position in the wire drawing action posture, the wire drawing marker cannot be returned to the storage posture unless the clutch lever of the planting clutch is operated from the on / off side.
That is, when the drawing marker is returned from the drawing working posture to the retracted posture, the drawing marker has the locking member engaged with the engaging portion of the cam plate constituting the lock mechanism. Since it is held in the pulling posture,
If the engaging portion of the cam plate is not disengaged from the locking member of the drawing marker by operating the clutch lever to the disengagement side, it cannot be returned to the storage posture, and the clutch lever is not disengaged. There is a problem that the cam plate, the locking member and the like are damaged when the wire drawing marker is returned to the stored posture. Therefore, in the related art, in order to manually return the wire drawing marker projected in the wire drawing working attitude to the housed attitude, it is necessary to always operate the clutch lever of the planting clutch to the disengagement side. . That is, for example, when performing seedling planting work on the ridge side of the field, if both of the drawing markers are run in the projecting position in the drawing action posture, the line drawing located on the ridge side is performed. Since the marker may collide with the ridges or be damaged, it is necessary to return the drawing marker on the ridge side from the drawing action posture to the retracted posture. In order to return the marker to the storage posture, it is necessary to operate the clutch lever once to the disengagement side. Therefore, the power to the seedling planting section is shut off and the seedling planting section is operated. The work is interrupted once, resulting in missing seedlings and poor work efficiency.

An object of the present invention is to not only change the posture of the drawing marker from the drawing action posture to the storage posture by operating the planting clutch from the on / off side, but also
Even when the manual operation lever is operated, it is possible to change the posture of the drawing marker to the storage posture side without damaging a lock mechanism or the like that holds the drawing marker in the drawing action posture. In point.

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 is such that the drawing marker 4 is attached to the body 1
A lock mechanism 6 for locking the wire drawing marker 4 in the wire drawing working attitude, which allows the wire drawing marker 4 to be projected in the width direction and the housing attitude for storing the wire drawing marker 4 in the machine body 1 side.
When the planting clutch is turned on and off, the locking mechanism 6
And a lock release mechanism 7 for changing the posture of the drawing marker 4 to the storage posture. In the rice transplanter, the support shaft 43 of the drawing marker 4 operates in conjunction with the manual operation lever 5. An operating arm 8 is provided, the operating arm 8 is interlocked with the wire drawing marker 4, and a lock release cam portion 9 for interfering with the operating arm 8 is provided on the cam plate 65 of the lock mechanism 6 for the manual operation. When the lever 5 is operated, the lock of the drawing marker 4 by the cam plate 65 can be released by the interference with the unlocking cam portion 9 of the operating arm 8.

According to a second aspect of the present invention, a play in which the drawing marker 4 operates at a predetermined delay after the operation of the operating arm 8 is provided between the interlocking portions of the operating arm 8 and the drawing marker 4. The gap T is provided.

[0008]

According to the invention as set forth in claim 1, at the time of seedling planting work by the rice transplanter, the wire drawing marker 4 is moved from the storage posture about the support shaft 43 by operating the manual operation lever 5 or manually. It is rocked to a pulling action posture, and in this drawing action posture, the draw marker 4 is moved to the cam plate 6 of the lock mechanism 6.
By marking the soil surface of the field with the drawing marker 4 locked in the drawing action posture and running the machine along the mark, the seedling planting section It is possible to perform seedling planting work while holding the row at a predetermined interval, and when the seedling planting work is finished and the line marker 4 is not used, power is transmitted to the seedling planting part. The locking clutch is operated from the on side to the off side to release the locked state of the drawing marker 4 by the cam plate 65 in the drawing action posture via the lock releasing mechanism 7, thereby Since the posture of the marker 4 can be changed from the drawing action posture to the storing posture, the posture of the drawing marker 4 can be changed to the storing posture also by operating the manual operation lever 5. is there. That is, when the manual operation lever 5 is operated, the operation arm 8 provided on the support shaft 43 is interlocked with the operation.
Is swung in a direction away from the cam plate 65 of the lock mechanism 6, and the operating arm 8 interferes with a lock release cam portion 9 provided on the cam plate 65, so that the line of the drawing marker 4 by the cam plate 65. By releasing the locked state in the pulling action posture, the pulling marker 4 can change the posture from the pulling action posture to the storage posture by releasing the lock. Therefore,
For example, when performing seedling planting work on the ridge side of the field, when changing the posture of the drawing marker 4 to the storage posture side, the planting clutch is operated to the disengagement side, and Even if power is shut off and the seedling planting work by the seedling planting unit is not interrupted, the manual operation lever 5 is operated to move the wire drawing marker 4 while the power transmission to the seedling planting unit is continued. The posture can be changed to the storage posture side without damage.

According to a second aspect of the invention, between the interlocking portion between the wire drawing marker 4 and the actuating arm 8,
The drawing marker 4 is delayed with a predetermined delay after the operation of the operating arm 8.
Since a play gap T for moving the drawing marker 4 is provided, when changing the attitude of the drawing marker 4 from the drawing working attitude to the retracted attitude, and when performing the attitude change to the retracted attitude side by the manual operation lever 5. First, the operating arm 8 interferes with the unlocking cam portion 9 provided on the cam plate 65 prior to the releasing operation of the cam plate 65 with respect to the drawing marker 4 in accordance with the operation of the operating lever 5. Due to this interference, the cam plate 65 is swung in the unlocking direction of the drawing marker 4, and thereafter, the releasing operation of the drawing marker 4 from the cam plate 65 is performed via the operating arm 8. Therefore, when the attitude of the wire drawing marker 4 is changed to the storage attitude by the manual operation lever 5, the attitude change does not damage the lock mechanism 6 that holds the wire drawing marker 4 in the wire drawing working attitude. Is the can be done smooth and reliable.

[0010]

EXAMPLE 6 FIGS. 6 and 7 show a six-row planting type rice transplanter, in which an engine 10 is provided in the bonnet 1a at the front of the machine body 1, and a mission case 11 is provided at the lower center side of the machine body 1. With this mission case 11
A pair of left and right swing cases 12 are supported on both sides of the swing case 12 so as to be swingable up and down, and drive wheels 13 interlockingly connected to the engine 10 are supported on the lower side of each swing case 12, while on the rear side of the machine body 1. Has a seedling planting section 3. The seedling planting section 3 is provided with three planting transmission cases 31, which are arranged at the center of the machine body in the width direction and on both left and right sides thereof.
A pair of planting claws 32 are respectively supported on the left and right sides of each of these cases 31, and at the rear side of each case 31, a seedling table 33 for mounting seedlings taken out by each of the planting claws 32 is provided. ing.

Then, a transmission frame 14 in which a transmission shaft interlocking with a mission mechanism inside the transmission case 11 is installed is projected toward the rear side of the machine body, and each of the seedling planting portions 3 is inserted through these transmission frames 14. The planted transmission case 31 is interlockingly coupled to the mission case 11 side, and a rear view gate-shaped coupling frame 15 is provided on the upper side of the planted transmission cases 31 located on the left and right sides.
And a branch rod 15a extending downward in the central portion of the connecting frame 15, and the branch rod 15a is connected to the plant transmission case 31 located at the central portion. Thus, the planted transmission cases 31 are integrally coupled to each other through the connecting frame 15 and the branch rod 15a. In addition, each of the planted transmission cases 31 includes a vertical rod portion 16a extending rearward along the ones located on the left and right sides thereof, and a rear end portion of each vertical rod portion 16a from the seedling table 33. They are also integrally connected to each other through a connecting frame 16 including a horizontal rod portion 16b that wraps around the lower rear surface.

Further, a seedling stand frame 17 for supporting the seedling placing table 33 is provided on the back side of the seedling placing table 33,
The seedling stand frame 17 includes a horizontal rod portion 17a extending in the machine width direction along the seedling placing table 33, and vertical rod portions 17b extending downward from the left and right ends of the horizontal rod portion 17a. By connecting each vertical rod portion 17b of the base frame 17 to the horizontal rod portion 16b of the connecting frame 16,
The connection frame 16 and the seedling frame 15 form a frame structure having a substantially trapezoidal shape in rear view, and
A handle frame 18 extending rearward of the machine body is supported on each of the horizontal rod portions 16b and 17b of the connecting frame 16 and the seedling frame 17.

A handle portion 19 having a grip portion 19a on the upper rear end side is provided on the upper side of the handle frame 18.
Is provided, and near the grip portion 19a of the handle portion 19,
It is connected to a main clutch lever 20 for turning on and off power transmission from the engine 10 to the mission case 11 and a planting clutch (not shown) provided on the planting transmission case 31 side of the seedling planting section 3. , A planted clutch lever 21 for turning on and off power transmission from the mission case 11 to the planted transmission case 31. Further, in the embodiments shown in the respective drawings, an elevating lever 22 for vertically adjusting the height of the body 1 together with the levers 20 and 21 is provided near the grip portion 19a of the handle portion 19. , The lift control valve 23a of the hydraulic device 23 mounted on the front side of the machine body 1 is connected to the valve 2a.
By operating the lift cylinder 24 provided in the machine body 1 by adjusting the opening degree of 3a, the swing case 12 is vertically swung via the lift arm 25 connected to the lift cylinder 24, and the swing case 12 is vertically swung. The wheel 1
The height of the shaft body 3 is changed to adjust the height of the machine body 1 up and down. Incidentally, in FIGS. 6 and 7, 26 is a center float provided at the lower center position of the machine body 1,
Reference numeral 27 denotes a pair of left and right side floats provided at both left and right sides of the center float 26. In addition, on the front side of the connection frame 15 that connects the planted transmission cases 31 of the seedling planting section 3 and the transmission frame 14 that connects the planted transmission cases 31 and the mission case 11,
A side view gate-shaped support frame 28 is installed, and a preliminary seedling stand 29 is provided on the upper side of the support frame 28.

Further, on both sides in the width direction of the machine body 1, a pair of left and right drawing markers 4 each of which is composed of a shaft rod portion 41 and a wire drawing portion 42 supported on the tip end side in the length direction of the shaft rod portion 41. To
The drawing action posture A shown by the imaginary line in FIG. 1 that is horizontally projected outward in the width direction of the machine body 1 and the drawing action posture A that is housed in the machine body 1 side in a substantially vertical state are shown in FIGS. The storage posture B shown by the solid line is provided so that the posture can be changed. That is, in the embodiment of FIGS. 6 and 7, each of the planted transmission cases 31
The horizontal rods 16b of the connecting frame 16 connecting the above-mentioned connecting rods 16 are provided with supporting shafts 43 projecting rearward at both left and right sides thereof, and the cylindrical members 44 are rotatably inserted and supported by the supporting shafts 43. The base end side of the shaft rod portion 42 of the wire drawing marker 4 is fixed to the cylindrical body 44, and the lateral rod portion 17a of the seedling stand frame 17 integrally connected to the connecting frame 16 is provided. Has a shaft rod 51 extending rearward on both left and right sides thereof.
A cylindrical body 52 is rotatably inserted into and supported by the shaft rod 51, the manual operation arm 5 is fixed to the cylindrical body 52, and the manual operation arm 5 is provided at an intermediate portion in the longitudinal direction. Is protrusion 5
3 is provided in a protruding manner, and the projection 53 and the shaft rod portion 41 of the wire drawing marker 4 are interlockedly connected via a connecting rod 54. Then, the manual operation lever 5 is moved to the shaft rod 51.
By swinging to the outer side of the machine centering around, the drawing marker 4 is changed in posture from the storage posture B to the drawing action posture A around the support shaft 43 via the connecting rod 54. In addition, the line drawing marker 4
Can be manually changed from the storage posture B to the drawing action posture A while being gripped by hand. Further, in this acting posture A, it can be locked by a lock mechanism described later to hold the posture A. Further, the drawing marker 4 is changed from the drawing working posture A to the storage posture B. When doing so, as will be described later, the lock of the wire drawing marker 4 by the lock mechanism is released in conjunction with the operation of the planted clutch lever 21, and the lock release cam portion is opened by the operation of the manual operation lever 5. By releasing the lock of the drawing marker 4 by the locking mechanism through the
The posture can be changed to the storage posture B.
In FIG. 2, reference numeral 44a denotes a retaining body provided on the side of the supporting shaft 43 on which the cylindrical body 44 is inserted.

More specifically, the cylindrical body 44 on the support shaft 43 for supporting the wire drawing marker 4 and the lateral rod portion 16b of the connecting frame 16 separated from the cylindrical body 44 toward the inside of the machine body. By providing spring receiving plates 45 and 46, respectively, and interposing a spring 47 between the receiving plates 45 and 46, which constantly biases the drawing marker 4 toward the storage posture B, the spring 47 is provided. The drawing marker 4 can be automatically returned from the drawing action posture A to the storage posture B via the.

Further, the lateral rod portion 1 of the connecting frame 16
The drawing marker 4 is provided on the outer side of the body of the support shaft 43 that supports the drawing marker 4 with 6a.
Locking mechanism 6 for locking the seedling planting portion 3 and power transmission to the planting transmission case 31 of each seedling planting portion 3 is interlocked with the planting clutch lever 21 that is turned on and off, and the clutch lever 21 is turned on and off. When this is done, a lock releasing mechanism 7 is provided for releasing the locked state of the drawing marker 4 by the locking mechanism 6 and changing the attitude of the drawing marker 4 from the drawing working posture A to the storage posture B. .

That is, in the embodiment shown in the drawings, the shaft mechanism 41 of the drawing marker 4 is used as the lock mechanism 6.
A protrusion rod 61 is provided at an intermediate portion in the longitudinal direction, and a lock pin 62 extending forward of the fuselage is supported by the protrusion rod 61 in a protruding manner, and an upper portion of the horizontal rod portion 16a is opened to the outside of the fuselage. On the movement locus of the lock pin 62 when the drawing marker 4 swings in the range between the drawing working posture A and the storing posture B inside the bracket 63. A cam plate 65 having a semi-circular engagement groove 64 with which the lock pin 62 is engaged, is movably supported to the outside of the body through an axial rod 66, and
When the drawing marker 4 is changed to the drawing action attitude A, the lock pin 62 is engaged with the engagement groove 6 of the cam plate 65.
By engaging with the wire drawing marker 4, the wire drawing marker 4 is held in the wire drawing action posture A. Also,
A coil spring 67 is inserted around the shaft rod 66 of the cam plate 65, and leg pieces provided at both ends in the length direction of the spring 67 are hooked on the bracket 63 and the cam plate 65, respectively. By constantly urging the cam plate 65 toward the inside of the body about the shaft rod 66, the drawing marker 4 is positioned in the drawing action posture A, and the lock pin 62 is engaged with the engaging groove of the cam plate 65. When engaged with 64, the lock pin 62 is engaged and retained in the engagement groove 64 to retain the drawing marker 4 in the drawing action posture A.

On the other hand, as the lock release mechanism 7, the release arm 71 projecting downward from the cam plate 65 of the lock mechanism 6 and the operation of the planted clutch lever 21 are interlocked with each other, so that the cam plate 65 is released. The operation cable 72 for performing the releasing operation is provided, and the operation cable 72 is
The outer cylinder 72a of the operation cable 72 is composed of an outer cylinder 72a and an inner wire 72b inserted into the outer cylinder 72a. The outer rod 72a of the connecting frame 16 is connected to the support shaft 43 and the cam plate 65 by the horizontal rod portion 16b. The inner wire 72b extending from the outer receiver 73 to the outside of the machine is connected to the release arm 71 of the cam plate 65 via a connecting member 74. At the same time, the other ends in the length direction of the outer cylinder 72a and the inner wire 72b are extended to the rear side of the machine body 1, and the inner wire 7 on the extended rear end side is extended.
2b is interlockingly connected to the planting clutch lever 21, and when the planting clutch lever 21 is turned off to cut off the power to the seedling planting section 3, the release arm is released by the inner wire 72b. 71 is pulled to swing the cam plate 65 to the outside of the machine against the biasing force of the coil spring 67, and the swinging of the release arm 71 causes the lock pin to move from the engagement groove 64 of the cam plate 65. By opening 62, the drawing marker 4 is automatically returned from the drawing working posture A to the storage posture B via the spring 47 interposed between the drawing marker 4 and the connecting frame 16. Of. In the illustrated embodiment, a rubber boot 75 is fitted around the outer circumference of the inner wire 72b between the outer receiver 73 and the connecting member 74.

In the above structure, however, the support arm 43 of the drawing marker 4 is provided with the operating arm 8 which operates in conjunction with the manual operating lever 5, and the operating arm 8 is used for the drawing marker 4. The lock plate 6 of the lock mechanism 6 is provided with a lock releasing cam portion 9 for interfering with the operating arm 8 so that the lock releasing cam portion 9 of the operating arm 8 can be operated when the manual operating lever 5 is operated. It is possible to release the lock of the drawing marker 4 by the cam plate 65 due to the interference of.

Specifically, as is apparent from FIGS. 1 to 3, the operating arm 8 is supported on the front side of the tubular body 44 of the support shaft 43 so as to be swingable in the lateral direction of the vehicle.
A U-shaped frame body 81 having an open inner side is fixed to an intermediate portion of the operating arm 8 in the longitudinal direction, and the frame body 81 is also attached.
The connecting rod 5 extending from the manual operation lever 5 is inserted into the inside of the base of the shaft rod 41 of the drawing marker 4 and extends from the manually operated lever 5 to one side of the side walls of the frame 81 facing each other.
4 while connecting the four, the frame 81 in the operating arm 8
On the open side of the drawing marker, a projecting rod 82 is provided so as to face the shaft rod portion 41 of the drawing marker 4, and the frame body 81 is removed from the machine body via the connecting rod 54 by the operation of the manual operation lever 5. By pushing it toward the outside, the operating arm 8 is swung toward the outside of the machine with the support shaft 43 as a center, and accordingly, the wire drawing marker 4 is moved from the storage posture B by the projecting rod 82. By changing the posture to the pulling action posture A and pulling the frame body 81 toward the inside of the machine body, the drawing marker 4 is moved from the pulling action posture A to the storage posture B via the frame body 81.
The posture of the working arm 8 can be changed, and an interference pin 83 that interferes with the unlocking cam portion 9 provided on the cam plate 65 of the lock mechanism 6 is provided on the tip end side of the operating arm 8.

Then, as shown in FIG. 3, between the drawing marker 4 and the projecting rod 82 of the operating arm 8, the drawing marker 4 is operated with a predetermined delay after the operation of the operating arm 8. By forming a play gap T and providing the play gap T, the drawing marker 4 is moved to the drawing action posture A.
The lock pin 62 provided on the wire-drawing marker 4 is moved by the cam plate 65 when the posture is changed between the storage plate B and the storage position B.
Before engaging and disengaging with the engaging groove 64, the lock release cam portion 9 is operated by the interference pin 83 of the operation arm 8, and the cam plate 65 of the cam mechanism 6 is swung by this operation. Eggplant.

Further, the unlock cam portion 9 is integrally formed on the inside of the body of the cam plate 65 constituting the lock mechanism 6, and in the illustrated embodiment, the unlock cam portion 9 is formed. When changing the posture of the drawing marker 4 from the storage posture B to the drawing action posture A,
The lock pin 62 provided on the side of the cam plate 65 engages with the engagement groove 6 of the cam plate 65.
4, the first cam surface 91 against which the interference pin 83 of the actuating arm 8 abuts before being engaged with 4, and the drawing marker 4 is moved to the drawing action posture A, When the posture of the drawing marker 4 to which the interference pin 83 is locked and the drawing marker 4 is changed from the drawing working posture A to the storage posture B, the lock pin 62 is separated from the engagement groove 64. The second cam surface 93 with which the interference pin 83 abuts is formed in advance, and the interference pin 83 is formed.
The operation of the lock release cam portion 9 will be described later.

Next, the operation of the above configuration will be described. At the time of seedling planting work by the rice planting machine described above, the wire drawing marker 4 is centered around the support shaft 43 thereof as shown in FIG. 1 by operating the manual operation lever 5 as described above or manually. The retracted posture B is swung from the retracted posture B to the drawing action posture A. At this time, the lock pin 62 provided on the drawing marker 4 side is engaged with the engagement groove 64 of the cam plate 65, and the coil spring 67 causes the lock spring 62 to move. The drawing marker 4 is held in the locked state in the drawing action posture A. Then, for example, when performing the seedling planting work in the seedling planting section 3 while reciprocally moving the machine body 1 in the field, the soil of the field by the line drawing marker 4 held in the line drawing action posture A during the forward movement. By attaching a mark to the surface, performing the seedling planting work by the seedling planting section 3 while running the aircraft along the mark at the time of returning, by repeating the seedling planting work along such a mark, The seedling planting row by the seedling planting section 3 can be held at a predetermined interval when the machine body 1 reciprocates.

Further, when the seedling planting work is completed and the wire drawing marker 4 is not used, the planting clutch lever 21 for transmitting and shutting off power to the seedling planting section 3 is turned from the on side to the off side. The cam plate 65 is operated by pulling the release arm 71 integrally formed with the cam plate 65 with the inner wire 72b which is interlocked with the clutch lever 21.
Against the urging force of the coil spring 67 and swinging toward the outer side of the machine body, the swinging of the release arm 71 releases the lock pin 62 from the engaging groove 64 of the cam plate 65, and the wire drawing marker 4 By releasing the locked state in the drawing action posture A, the drawing marker 4 and the connecting frame 1
The drawing marker 4 can be automatically returned from the drawing working posture A to the storage posture B via the spring 47 interposed between the drawing marker 4 and the drawing marker 6.

Further, the retracted posture B of the drawing marker 4
The attitude can be changed to the side by operating the manual operation lever 5. That is, by operating the manual operation lever 5, the operating arm 8 supported on the support shaft 43 thereof is swung in the direction away from the cam plate 65 of the lock mechanism 6, and the lock release cam portion provided on the cam plate 65 is moved. 9, the interference pin 83 of the operating arm 8 is caused to interfere with each other to swing the cam plate 65 toward the outside of the machine body, and the swinging movement of the release arm 71 causes the lock pin 6 to move from the engagement groove 64 of the cam plate 65.
By releasing 2, the locked state of the drawing marker 4 in the drawing action posture A is released, and by this lock release, the drawing marker 4 is moved from the drawing action posture A to the storage posture B.
Therefore, the power of the seedling planting section 3 is cut off by operating the planting clutch lever 21 to the cut side, and the seedling planting section 3 is operated. The operation of the manual operation lever 5 is performed to change the posture of the drawing marker 4 to the storage posture B side while the power transmission to the seedling planting portion 3 is continued without interrupting the work. It is possible.

As described above, when the manual operation lever 5 is operated to swing the drawing marker 4 from the storage posture B to the drawing action posture A about the support shaft 43, the manual operation lever 5 is moved. In association with the operation of 5, the operating arm 8 is swung to the outside of the machine about the support shaft 43, and accordingly, the drawing marker 4 is moved from the storage posture B by the projecting rod 82 provided on the operating arm 8. The posture is changed to the drawing action posture A. At this time, since the play gap T is formed between the drawing marker 4 and the projecting rod 82 of the operating arm 8, as shown in FIG. Before the lock pin 62 provided on the wire drawing marker 4 is engaged with the engagement groove 64 of the cam plate 65,
The interference pin 83 of the operation arm 8 is brought into contact with the first cam surface 91 of the unlocking cam portion 9, and the cam surface 91 is pushed by the interference pin 83, so that the cam plate 65.
Is retracted to the outside of the body around the shaft rod 66 while resisting the coil spring 67, and in this retracted state, the lock pin 6
2 is moved to a position facing the engagement groove 64, and when the interference pin 83 is locked to the locking surface 92 of the lock release cam portion 9, the cam spring 67 biases the cam. The plate 65 is swung toward the inside of the body, and the lock pin 62 is engaged with the engagement groove 64 of the cam plate 65.
By holding this engaged state by the coil spring 67, the drawing marker 4 is locked and held in the drawing action posture A as shown by the solid line in FIG.

Further, when changing the posture of the drawing marker 4 from the drawing working posture A to the storage posture B by operating the manual operation lever 5, the drawing marker 4 and the projecting rod 82 of the operating arm 8 are moved. By providing the play gap T between the two, before the lock pin 62 of the drawing marker 4 is separated from the engagement groove 64 of the cam plate 65, as shown by the phantom line in FIG. In advance, the operating arm 8
The interference pin 83 of the locking surface 92 of the unlocking cam portion 9.
The second cam surface 93 and is brought into contact with the second cam surface 93.
3 is pushed by the interference pin 83, the cam plate 65 is retracted to the outside of the machine body about the shaft rod 66 while resisting the coil spring 67, and the lock pin 62 is retracted in this retracted state. As shown by the solid line in FIG. 3, the drawing marker 4 is moved by the spring 47 that is separated from the engagement groove 64 and interposed between the drawing marker 4 and the connecting frame 16. The posture A is automatically returned to the storage posture B.

Therefore, as described above, when changing the posture of the drawing marker 4 between the drawing working posture A and the storage posture B by the manual operation lever 5, the distance between the drawing marker 4 and the operating arm 8 is increased. By forming the play gap T in the drawing marker, it is possible to more effectively prevent the lock pin 62 provided on the drawing marker 4 side and the cam plate 65 of the locking mechanism 6 from being damaged, and the drawing marker T It is possible to smoothly and surely change the posture between the drawing action posture A and the storage posture B of 4.

By the way, as the line drawing marker 4,
As shown in FIG. 5, a shaft portion 4a extending in the machine width direction,
A substantially L-shaped one having a leg portion 4b bent from the shaft portion 4a to the lower side of the machine body, and an earth-filling scoop 4c for forming a mark on the field soil surface D at the lower end side of the leg portion 4b may be used. Therefore, in the embodiment shown in the figure, the cylindrical body 102 having the projecting piece 101 is inserted into the shaft portion 4a of the wire drawing marker 4, and the projecting piece 101 of the cylindrical body 102 is attached to the step 103 on the machine body 1 side. The shaft 4a is provided with a projecting rod 105 extending toward the drive wheel 13, and the shaft rod 10 is provided on the lower end side of the projecting rod 105.
The actuating rod 107 can be interposed and separated between the spokes 13c radially installed between the center boss portion 13a of the drive wheel 13 and the ring body 13b via 6 (solid line and phantom line states in the figure). When the operating rods 107 intervene between the spokes 13c, the operating rods 107 move along the width of the machine body while overcoming the spokes 13c as they rotate. A coil spring 108 is fitted on the shaft portion 14a of the pulling marker 4, and leg pieces provided at both ends in the length direction of the spring 108 are hooked on the cylindrical body 102 and the projecting rod 105, respectively.

And, when carrying out seedling planting work, in particular,
When the water on the soil surface D is deep, as shown by the solid line in the figure, the actuating rod 107 is swung about the shaft rod 106, and the tip side of the actuating rod 107 is interposed between the spokes 13c. By rotating the drive wheels 13,
The operating rod 107 is pushed by each of the spokes 13c, and accordingly, the leg portion 4b of the wire drawing marker 4 is rotated around the shaft portion 4a inserted into the cylindrical body 102 through the protruding rod 105. While moving and compressing the spring 108,
The earth-filling scoop 4c is rushed into the soil surface D to scoop up a part of the soil, and the operating rod 107 causes each of the spokes 13 to move.
When you get over c and move to the outside in the width direction of the aircraft,
The spring 108 swings the leg portion 4b downward,
Scooping soil by the earth-filling scoop 4c is thrown up on the soil surface D in a heap shape, and the earth-filling scoop 4
By intermittently repeating the scooping and throwing of a part of the soil by c with the rotation of each of the spokes 13c, seedling planting work is performed while marking the heaped soil that has been heaved on the soil surface D as a mark, In doing so, even when the water on the soil surface D is deep, the seedling planting row by the seedling planting unit 3 is held at a predetermined interval while marking the heaped soil heaped on the soil surface D as a mark. It is possible. On the other hand, when the water on the soil surface D is shallow, as shown by the phantom line in the figure, the operating rod 107 is swung toward the power cutoff side with respect to each of the spokes 13c, and
It is also possible to make a linear mark on the soil surface D with the scoop 4c by running the work while the earth-filled scoop 4c is grounded.

Further, in the embodiment shown in FIG.
The shaft portion 4a of the wire-drawing marker 4 is inserted so as to be capable of expanding and contracting in the machine width direction, and a plurality of through holes 4 are formed in the shaft portion 4a.
By forming d, selecting each of the through holes 4d from the mounting holes provided in the tubular body 102 and inserting and fixing the fixing pin 109, the draw marker 4 can be adjusted to expand and contract in the machine width direction. There is.

[0032]

As described above, according to the first aspect of the invention, the drawing action posture in which the drawing marker 4 is projected in the width direction of the machine body 1 and the storage posture in which the drawing marker 4 is stored in the machine body 1 side. And a lock mechanism 6 for locking the wire drawing marker 4 in a wire drawing working attitude, and when the planting clutch is turned on and off, the lock mechanism 6 is released to release the wire drawing marker 4 In the rice transplanter equipped with the lock release mechanism 7 for changing the posture to the storage posture,
An operating arm 8 that operates in conjunction with the manual operation lever 5 is provided on the support shaft 43 of the above, and this operating arm 8 is interlocked with the above-mentioned drawing marker 4, and the operating plate 8 is attached to the cam plate 65 of the lock mechanism 6. 8 is provided with a lock releasing cam portion 9 for releasing the lock of the wire drawing marker 4 by the cam plate 65 due to the interference of the operating arm 8 with the lock releasing cam portion 9 when the manual operation lever 5 is operated. Therefore, at the time of seedling planting work, the wire drawing marker 4 is attached to the support shaft 43 by operating the manual operation lever 5 or manually.
Is pivoted from the storage position to the drawing action position, and the drawing marker 4 is locked by the cam plate 65 of the lock mechanism 6 in this drawing action position and locked in the drawing action position. By marking the soil surface of the field with the line drawing marker 4, and running the aircraft along this mark,
It is possible to perform seedling planting work while keeping the seedling planting line by the seedling planting unit at a predetermined interval, and when the line drawing marker 4 is not used when the seedling planting work is finished, the seedling planting work is performed. By operating the planting clutch that transmits and shuts off power to the attachment part from the on-off side to the off-side, the locked state of the drawing marker 4 in the drawing action posture by the cam plate 65 via the lock release mechanism 7 is released. By doing so, it is possible to change the attitude of the drawing marker 4 from the drawing working attitude to the retracted attitude, and to change the attitude of the drawing marker 4 to the retracted attitude, operate the manual operation lever 5. It can also be done by doing things. That is, when the manual operation lever 5 is operated, the operation arm 8 provided on the support shaft 43 is oscillated in the direction away from the cam plate 65 of the lock mechanism 6 in association with the operation, and the operation arm 8 is provided on the cam plate 65. Unlocking cam section 9
The actuating arm 8 is interfered with by the cam plate 65 to release the locked state of the drawing marker 4 in the drawing action posture, and by this unlocking, the drawing marker 4 is retracted from the drawing action posture. Therefore, it is possible to change the posture to, so that the planting clutch is operated to the disengaged side to shut off the power to the planting section, and the planting work by the planting section is once interrupted. Without doing so, the posture can be changed by operating the manual operation lever 5 while continuing the power transmission to the seedling planting portion without damaging the wire drawing marker 4 to the storage posture side.

According to the second aspect of the invention, between the interlocking portion between the wire drawing marker 4 and the actuating arm 8,
The drawing marker 4 is delayed with a predetermined delay after the operation of the operating arm 8.
When the attitude of the wire drawing marker 4 is changed from the wire drawing working attitude to the housed attitude, the manual operation lever 5 is used to change the attitude to the housed attitude because the play gap T for moving , The operating arm 8 is caused to interfere with the unlocking cam portion 9 provided on the cam plate 65 prior to the releasing operation of the cam plate 65 with respect to the drawing marker 4 in accordance with the operation of the operating lever 5. By the cam plate 6
5 is swung in the unlocking direction of the wire drawing marker 4, and then the wire drawing marker 4 is released from the cam plate 65 via the actuating arm 8, whereby the manual operation lever 5 is operated. When changing the posture of the drawing marker 4 to the storage posture side, the change of the posture is performed by the drawing marker 4
It is possible to more effectively prevent damage to the lock mechanism 6 that holds the wire in the drawing action posture, and to carry out smoothly and reliably.

[Brief description of drawings]

FIG. 1 is a rear view showing a main part of a rice transplanter according to the present invention.

FIG. 2 is a side view of the main part.

FIG. 3 is an enlarged view of a main part as seen from the direction of arrow C in FIG.

FIG. 4 is a partially cutaway rear view showing an operating state.

FIG. 5 is a partially cutaway rear view showing another embodiment of the wire drawing marker.

FIG. 6 is a side view showing the entire structure of the rice transplanter.

FIG. 7 is a rear view of the same.

[Explanation of symbols]

 1 ... Aircraft 4 ... Drawing marker 43 ... Support shaft 5 ... Manually provided lever 6 ... Lock mechanism 65 ... Cam plate 7 ... Lock release mechanism 8 ... Operating arm 9 ... Unlock cam T ... Play gap

Claims (2)

[Claims] 1. The drawing marker (4) can be changed into a drawing working posture in which the drawing marker (4) projects in the width direction of the machine body (1) and a storage posture in which the drawing marker (4) is stored in the machine body (1) side. When the locking mechanism (6) for locking the marker (4) in the drawing action posture and the planting clutch are turned on and off, the locking mechanism (6) is released to store the drawing marker (4). In a rice transplanter equipped with a lock release mechanism (7) for changing the posture, an operating arm (8) operating in conjunction with a manual operation lever (5) on a support shaft (43) of the wire drawing marker (4). ) Is provided to connect the working arm (8) to the wire drawing marker (4).
And a cam plate (65) of the lock mechanism (6) is provided with a lock release cam portion (9) that interferes with the operating arm (8), and when the manual operation lever (5) is operated, Unlocking cam part (9) of the operating arm (8)
The rice transplanter is characterized in that the lock of the wire drawing marker (4) by the cam plate (65) can be released by the interference with the cam plate (65). 2. An actuating arm (8) and a wire drawing marker (4).
A play gap (T) in which the wire drawing marker (4) operates with a predetermined delay after the operation of the actuating arm (8) between the interlocking part with
The rice transplanter according to claim 1, further comprising: