JP2017112952A - Transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transplanter executing oscillation operation of a work machine lever accompanied with a predetermined travel machine body operation only when an automatic lifting operation of a planting work machine is required.SOLUTION: A transplanter includes: a planting work machine 6; a work machine lever 18 operating lifting/lowering of the planting work machine 6; an automatic lifting operation mechanism 50 automatically lifting the planting work machine 6 accompanied with predetermined operation of a travel machine body 3; and a linkage mechanism 46 mechanically linking the planting work machine 6 to work machine lever 18 so that the work machine lever 18 oscillated to a lifting operation position is oscillated and operated to a stop operation position stopping lifting/lowering of the planting work machine 6 accompanied with lifting of the planting work machine 6 to a predetermined height. In the transplanter, restraining means 75 is provided for restraining automatic lifting of the planting work machine 6 even when the predetermined operation of the travel machine body 3 is performed, in a case where the planting work machine 6 is lifted/lowered in a range from a non-work height being lifting/lowering height in a non-work state set lower than the predetermined height to the predetermined height.SELECTED DRAWING: Figure 13

Description

  The present invention relates to a transplanter capable of automatically driving a planting work machine up in conjunction with a traveling machine body operation of the traveling machine body and automatically stopping the planting work machine driven up in a predetermined height.

  A planting work machine connected to the traveling machine body through a lift link, a working machine lever that swings the planting work machine up and down, and a lifting operation that is an operation position for raising the planting work machine An elastic member that urges the work implement lever to the position side, a restricting member that restricts the swing operation of the work implement lever from the stop operation position to the ascending operation position by the elastic member, and a restriction in accordance with a predetermined operation of the traveling machine body By providing a release mechanism that releases the restriction by the member, an automatic ascending operation mechanism that automatically raises the work machine in accordance with a predetermined operation of the traveling machine body is provided, and the planting work machine can be raised to the highest position. At the same time, the working machine lever swung to the raising operation position is oscillated to the stop operation position that is the operation position at which the raising and lowering of the planting work machine stops against the elastic force of the elastic member. The planting machine and the work machine Transplanter described in Patent Document 1 provided with a linkage mechanism for mechanically linking the chromatography are known conventionally.

JP 2013-51919 A

  In the transplanter described in the above document, the work implement lever is automatically operated to the ascending operation position in accordance with a predetermined operation of the traveling machine, so that the planting work implement is raised to a predetermined height, and then the work implement lever is stopped. By automatically operating to the operation position, it is possible to automatically stop the raising of the planting work machine. On the other hand, the planting work machine that has been raised to a predetermined height is caused by its own weight. There has been a problem that when a predetermined traveling machine body operation of the traveling machine body is performed in a state where the hydraulic oil in the hydraulic cylinder is slightly lowered due to leakage or the like, the work machine lever may be automatically operated unnecessarily.

  The present invention relates to a transplanter capable of automatically raising a planting work machine to a predetermined height in accordance with a predetermined traveling machine operation, in a state where the planting work machine is at a working height in a field or the like. An object of the present invention is to provide a transplanter in which a swing operation of a work implement lever accompanying a predetermined traveling machine body operation is executed only when an automatic lifting operation of the planting implement is required.

  In order to solve the above-mentioned problem, first, a planting work machine 6 connected to the traveling machine body 3 via a lifting link 4 so as to be lifted and lowered, and a work machine lever that performs a lifting operation of the planting work machine 6 by swinging. 18, an elastic member 41 that urges the work machine lever 18 toward the raising operation position that is the operation position for raising the planting work machine 6, and a lifting operation position from the stop operation position of the work machine lever 18 by the elastic member 41. By providing a regulating member 42 that regulates the swinging operation to the vehicle and a release mechanism 43 that releases the regulation by the regulating member 42 in accordance with the predetermined operation of the traveling machine body 3, the planting accompanying the predetermined operation of the traveling machine body 3 is provided. An automatic raising operation mechanism 50 that automatically raises the attachment work machine 6 is provided, and the work machine lever 18 that is swung to the raising operation position as the planting work machine 6 is raised to a predetermined height is provided with the elasticity described above. Plants against the elastic force of the member 41 A transplantation mechanism including a linkage mechanism 46 that mechanically links the planting work machine 6 and the work machine lever 18 so as to swing to a stop operation position that is an operation position at which the lifting and lowering of the work machine 6 is stopped. In the machine, when the planting work machine 6 is lifted and lowered to a predetermined height from a non-working height that is a lifting height in a non-working state set lower than the predetermined height, Even if a predetermined operation of the traveling machine body 3 is performed, a check means 75 is provided that checks the automatic lifting of the planting work machine 6 due to the release of the restriction of the release mechanism 43.

  Secondly, the checking means 75 is characterized in that it includes an adjusting portion 82 for adjusting the position of the non-working height.

  Thirdly, the adjusting unit 82 is configured to be able to always be set to a check state in which the automatic lifting of the planting work machine 6 is checked by the check means 75 regardless of the elevation position of the planting work machine 6. Yes.

  When the predetermined operation of the traveling machine body is performed in a state where the planting work machine is raised from the non-working height to the predetermined height, the checking means controls the restriction member by the release mechanism. Only when the planting work machine is operated at a work position lower than the non-working height by checking the release operation and preventing the biasing force of the elastic member from acting on the work machine lever side. Since the operation to the raising operation position of the work machine lever accompanying the predetermined operation of the machine body is executed, it is possible to prevent the work machine lever from being automatically operated unnecessarily.

  Further, according to the restraining means provided with an adjusting portion that adjusts the position of the non-working height, by changing the position of the non-working height, the restraining release by the unlocking mechanism by the restraining means 82 is performed. Since the raising / lowering range in which the check is executed can be changed, versatility is improved.

  The adjusting unit 82 can be set to a check state in which the restriction release operation by the restriction member is always checked by the check means regardless of the raising / lowering position of the planting work machine. An operation of traveling backward to the shore while descending can be performed as necessary.

1 is an overall side view of a riding rice transplanter to which the present invention is applied. It is a whole perspective view which shows a working machine interlocking mechanism. It is a side view of a work machine interlocking mechanism. It is a top view of a working machine interlocking mechanism. It is a front view of a work machine interlocking mechanism. It is a principal part side view which shows the working machine interlocking mechanism at the time of planting. It is a principal part side view which shows the working machine interlocking mechanism of the state which lowered | hung the planting work machine. It is a principal part side view which shows the working machine interlocking mechanism at the time of reverse gear shifting. It is a principal part side view which shows the working machine interlocking mechanism when a working machine lever is automatically operated to a raise position. It is a principal part side view which shows the working machine interlocking mechanism at the time of the raising drive of a planting working machine. It is a principal part side view which shows the pressure accumulation of the tension spring at the time of a raise drive. It is a principal part side view which shows the state by which the working machine lever was operated to the fixed position by the automatic stop mechanism. It is the side view which showed the check mechanism.

Hereinafter, embodiments of the present invention will be described based on illustrated examples.
FIG. 1 is an overall side view of a riding rice transplanter to which a transplanter of the present invention is applied. The riding rice transplanter includes a traveling machine body 3 having a pair of left and right front wheels 1, 1 and rear wheels 2, 2, and a planting that is connected to the rear of the traveling machine body 3 by a hydraulic cylinder via a lifting link 4. An attachment work machine 6 and a horizontal leveling work machine 7 disposed between the planting work machine 6 and the rear wheel 2 are provided.

  An airframe 8 that supports the traveling airframe 3 is mounted with an engine (not shown) surrounded by a bonnet 9 at the front, and an operator gets on the rear side of the engine to perform a steering operation or the like. A control unit 11 is provided.

  The steering unit 11 includes a seat 12 on which an operator is seated, a steering handle 13 for steering operation, a floor step 14 formed on the lower side of the steering handle 13, and a speed change lever 16 for operating speed change by a speed change mechanism. A brake pedal 17 for operating the brake operation of the traveling machine body 3 and a work machine lever 18 for moving the planting work machine 6 up and down guided by a guide hole (not shown) are arranged. The working machine lever 18 can be operated to a planting work position on the front end side of the guide hole, a fixed position fixed to the midway portion, and a raised position on the rear end side.

  The planting machine 6 includes a seedling stage 19 on which seedlings to be planted on a farm field are placed, and a planting unit 21 that performs the work of planting seedlings placed on the seedling stage 19 to the field. The leveling work machine 7 includes a square columnar leveling rotor 22. As a result, the riding rice transplanter uses the leveling work machine 7 to level the field which has been rough due to the turning of the machine during the planting work, and uses the planting work machine 6 to plant seedlings in the field after leveling. Can do.

  The planting work machine 6 is intermittently powered by a planting clutch (not shown) that turns on and off the driving force on the planting work machine side. The planting clutch is operated to be turned on and off via a work machine interlocking mechanism 23 described later by operating the work machine lever 18 back and forth, so that the driving force of the planting machine is driven by the work machine lever 18. Is configured to be intermittently operated.

  Furthermore, the raising / lowering operation of the planting work machine 6 is performed via the raising / lowering link by the expansion / contraction operation | movement of the raising / lowering cylinder 10 which consists of a hydraulic cylinder which is not shown in figure. The elongating / contracting operation of the elevating cylinder is mechanically linked to the forward / backward swing operation of the working machine lever and the working machine interlocking mechanism.

  FIG. 2 is an overall perspective view showing the work machine interlocking mechanism. In the illustrated working machine interlocking mechanism 23, the planting work machine 6 is lowered by swinging the work machine lever 18 to the forward (downward) side lowering operation position, and the working machine lever 18 is moved backward (upward). The planting work machine 6 is configured to move up by swinging to the ascending operation position.

  In addition, the work machine interlocking mechanism 23 operates the work machine lever 18 to the ascending operation position on the rear work machine ascending side to raise the planting work machine 6, and the planting work machine 6 is moved to a predetermined lifting position. Then, the work implement lever 6 is automatically returned to the front side from the ascending operation position, and is a lever that is elastically positioned at a fixed position (stop operation position) formed on the right side of the front / rear intermediate position of the guide hole 5. An automatic stop mechanism is provided for fixing the planting work machine 6 at a predetermined height (most elevated position) by a return mechanism (linkage mechanism).

  Further, the work implement interlocking mechanism 23 automatically operates the work implement lever 18 to the rear side by switching the shift lever 16 in the reverse direction to cut off the driving of the planting work implement 6 and the planting operation. When the automatic ascending operation mechanism 50 that automatically raises the machine 6 and the planting work machine 6 are raised and lowered between the predetermined height and a predetermined non-working height set lower than the predetermined height. Is provided with a check mechanism 75 for checking the raising of the planting work machine 6 by the automatic raising operation mechanism 50. Hereinafter, the configuration of the work machine interlocking mechanism will be described (see FIG. 3).

  Next, the working machine interlocking mechanism will be described with reference to FIGS. 3 to 5 are a side view, a plan view, and a front view of the work machine interlocking mechanism. As shown in the figure, the work implement interlocking mechanism 23 includes the work implement lever 18 and an operating cam 31 that is attached to the base end side of the work implement lever 18 so as to rotate integrally with the work implement lever 18. And a pivot shaft 34 extending in the left-right direction and pivotally supported so as to pass through an inverted U-shaped support member 33 attached to the traveling machine body 3 side. And a contact pin 36 that is provided on a valve arm 38 that operates a hydraulic valve 37 that supplies and discharges hydraulic pressure to and from the elevating cylinder 10 and that contacts the operating cam 31.

  Further, the work machine interlocking mechanism 23 is pivotally supported by the pivot shaft 34 as a fulcrum as the automatic raising operation mechanism 50, and extends forward of the pivot shaft 34. A rotating arm 39 formed with a front arm 39a and a rear arm 29b extending rearward, and biasing the rotating arm 39 to swing the work implement lever 18 backward via the operating cam 31. An upper spring 41A and a lower spring 41B, which are a pair of upper and lower tension springs 41 to be operated, a regulation member 42 that regulates the pivoting operation of the pivot arm 39 urged by the tension spring 41, and the regulation member 42 A release mechanism 43 for releasing the restriction of the turning arm 39 and a turning arm side link 44 for accumulating an urging force in the tension spring 41 as the planting work machine 6 is lifted. It is equipped with a.

  Further, the work machine interlocking mechanism 23 is the automatic cam mechanism, and the operation cam is a lever return mechanism that operates the work machine lever 18 from the lift operation position to the fixed position when the planting work machine is raised to a predetermined position. An operating cam side link 46 for automatically operating 31 is provided. A specific configuration of the check mechanism 75 will be described later.

  The working machine lever 18 is inclined in an L shape with the gripping part side facing the traveling machine body outside, and a midway part is bent toward the inside of the traveling machine body to form a horizontal part 18a. The middle part of the horizontal portion 18a is attached to the traveling machine body 3 side, and the bent part side (outside the traveling machine body) is biased downward by a lever spring 47 from the attachment position. Thereby, the work machine lever 18 is always urged toward the outside of the traveling machine body 3. Further, the working machine lever 18 is provided with a U-shaped attachment member 20 having an open lower side on the bent portion side, and rotates integrally with the rotation shaft 34 sandwiched by the attachment member 20. As installed.

  The operating cam 31 has a front fan-shaped part 48 and a rear fan-shaped part 49 formed in a fan shape on the front side and the rear side of the rotating shaft 34, and the lower side of the rear fan-shaped part 49. The contact part 51 is extended. The contact pin 36 is disposed on the front side of the contact portion 51 so as to contact.

  Further, the contact pin 36 is disposed on the front side of the contact portion 51 of the operating cam 31, and a valve arm 38 that is rotated by contacting the contact pin 36, and the valve arm 38 is operated. The hydraulic valve 37 is provided on the left and right inner sides (traveling machine body side) of the operating cam 31. Therefore, when the contact portion 51 of the operating cam 31 rotates forward in accordance with the operation of the work machine lever 18 toward the raising operation position (rear side), the contact pin 36 that contacts the contact portion 51 is moved. The hydraulic valve 37 is operated through a valve arm 38 that is swung forward and contacts the corresponding contact pin 36.

  The front fan-shaped portion 48 of the operating cam 31 is a circle centered on the rotating shaft 34 so that the rotating arm 39 can rotate independently of the operating cam 31 within a predetermined range. An arc-shaped front interchange hole 48a is formed. Further, the rear fan-shaped portion 49 of the working cam 31 is formed with an arcuate rear accommodation hole 49a that is connected to the working cam side link 46 and that is centered on the rotation shaft 34.

  The rotating arm 39 is pivotally supported by the rotating shaft 34 on the outer side in the left-right direction (right side in the illustrated example, the right side in the following) from the operating cam 31. That is, since the rotation arm 39 and the operation cam 31 rotate about the same rotation shaft 34, the range of the rotation operation in a side view is surely wrapped.

  Further, on the end side of the front arm 39a, a front interchangeable pin 52 that protrudes to the left and right inner sides (left side in the illustrated example) that is the working cam side is provided. Is inserted through a front accommodation hole 48a.

  In the vicinity of the front interchangeable pin 52 of the front arm 39a, a front arm side locking pin 53 is provided projecting toward the right side so that one end of the upper spring 41A is locked. The other end side of the upper spring 41A is on the traveling machine body 3 side, and is locked by a machine body side locking pin 54A provided on the rear upper side of the rotating shaft 34 (actuating cam 31). , Provided above the fulcrum of the rotation shaft 34 (hereinafter referred to as a rotation fulcrum). Accordingly, the upper spring 41A is attached so as to rotate the rotating arm 39 counterclockwise as viewed from the right side by urging the end side of the front arm 39a toward the rear upper side of the rotation fulcrum. It is fast.

  On the other hand, a rear arm side locking pin 56 is provided projecting from the end side of the rear arm 39b toward the right side so that one end side of the lower spring 41B is locked. The other end side of the lower spring 41B is the traveling machine body 3 side, and is locked by a machine body side locking pin 54B provided on the lower front side of the rotating shaft 34 (the operation cam 31). The side spring 41B is provided below the rotation fulcrum. As a result, the lower spring 41B biases the end side of the rear arm 39b toward the front lower side of the rotating shaft 34 so that the rotating arm 39 rotates counterclockwise when viewed from the right side. Energized.

  As a result, the upper spring 41A and the lower spring 41B are arranged so as to face each other with the rotation fulcrum of the rotation shaft 34 interposed therebetween, and the upper spring 41A and the lower spring 41B are provided so as to exert an urging force in the opposite direction. The turning operation of the turning arm 39 by the urging force of the spring 41A and the lower spring 41B can be performed efficiently.

  The restricting member 42 is pivotally supported by a restricting shaft 42 a provided on the traveling machine body 3 side and on the lower rear side of the rotating shaft 34, and a base end of the rear arm side locking pin 56. The side abuts against the restricting portion 57 formed thicker than the tip side. Specifically, the restriction member 42 extends upward from the restriction shaft 42 a, and a restriction contact portion 42 b that is cut out in an L shape is formed on the upper front side in contact with the restriction portion 57. As a result, the restricting portion 57 of the rear arm 39b urged downward by the tension spring 41 and the restricting contact portion 42b of the restricting member 42 abut, and the rotation of the rotating arm 39 urged by the tension spring 41 is rotated. Restrict movement.

  The restricting member 42 is provided with a restricting spring 58 that biases the restricting member 42 toward the rotating arm 39. The restricting member 42 has an overhanging portion 42c projecting toward the rear side of the restricting shaft 42a, and a restricting side locking pin 59 projects from the overhanging portion 42c. The lower end side of the restriction spring 58 is engaged with the restriction side locking pin 59, and the upper end side of the restriction spring 58 is provided on the traveling machine body 3 side and on the upper front side of the overhanging portion 42c. It is locked to the machine body side locking pin 54C. As a result, the regulating member 42 is biased by the regulating spring 58 so as to rotate clockwise as viewed from the right side.

  The release mechanism 43 is constituted by a wire 61 that releases the contact between the restriction contact portion 42 b of the restriction member 42 and the restriction portion 57 of the rotating arm 39 by swinging the restriction member 42 backward. The wire 61 includes an inner wire 63 that connects a restriction-side locking pin 59 of the restriction member 42 and an interlocking portion 62 provided on the base end side of the speed change lever 16, and an inner wire 63 that houses the inner wire 63. And an outer 64 fixed to the third side.

  At this time, when the speed change lever 16 is operated backward, the inner wire 63 is configured to pull the restriction side lock pin 59 downward, so that the control side lock is interlocked with the reverse movement switching operation of the speed change lever 16. When the pin is pulled downward, the regulating member 42 is slightly rotated counterclockwise as viewed from the right side against the urging force of the regulating spring 58. Thereby, the contact between the restriction contact portion 42b of the restriction member 42 and the restriction portion 57 of the rotating arm 39 is released.

  Therefore, when the restriction by the restriction member 42 is released by the release mechanism 43, the turning arm 39 urged by the tension spring 41 to turn counterclockwise as viewed from the right side turns according to the urging force. It becomes possible.

  Further, as shown in FIG. 2, the interlocking portion 62 is connected to the end portion of the inner wire 63 on the side of the speed change lever, provided with a rotation fulcrum 55 on the upper side of the connection portion, And a guide member 65 formed with a guide portion 65a extending forward from a midway portion in the left-right direction of the swing plate 60. .

  The rocking plate 60 is formed with an abutment guide 60 a extending forward so as to be parallel to the guide portion 65 a on the left side of the guide member 65. It is configured to be installed between the abutment guide 60 a of 60 and the guide portion 65 a of the guide member 65. The guide member 65 is fixed to the traveling machine body 3 side.

  Further, the shift lever 16 is moved forward and backward by swinging back and forth. However, in the neutral position, the shift lever 16 is configured to swing in the left-right direction. When performing the reverse operation), it is necessary to perform the backward swing operation with the shift lever 16 being swung to the left (not shown). Thereby, an erroneous operation can be prevented.

  Accordingly, when the speed change lever 16 is reversely switched from the neutral position, the speed change lever 16 is swung to the left side, whereby the base end side of the speed change lever 16 is brought into contact with the abutment guide 60a and pushed out to the left side. The contact guide 60 a side of the moving plate 60 is swung downward about the rotation fulcrum 55. Therefore, when the shift lever 16 is operated backward, the inner wire 63 connected to the lower right side of the rotation fulcrum 55 is pulled upward, and the end portion side of the inner wire 63 on the release mechanism 42 side lowers the regulating member 42. It is comprised so that it may pull on.

  The pivot arm side link 44 is disposed on the base end side of the lower link 66 constituting the elevating link 4 and extends to the front side of the swing shaft 67 pivotally supported in the left-right direction. And a front connecting portion 68 that swings up and down as the swing shaft 67 rotates, and a connecting rod 69 that connects the end side of the front connecting portion 68 and the rotating arm 39. ing.

  The connecting rod 69 is connected between the front end portion of the front arm 39a and the rotating shaft 34. The connecting rod 69 has an upper rod 69a whose upper end is connected to the rotating arm 39 side, a lower rod 69b whose lower end is connected to the front connecting portion 68 side, a lower end of the upper rod 69a, and an upper end of the lower rod 69b. And a sleeve-like connector 69c for inserting / fixing.

  According to the rotating arm side link 44, the swing shaft 67 rotates in the forward rotation direction as the planting work machine 6 is lifted, and the front side connecting portion 68 is rotated along with the forward rotation of the swing shaft. As the front connecting portion 68 swings downward, the connecting rod 69 is pulled downward, and as the connecting rod 69 moves downward, the rotating arm 39 rotates clockwise as viewed from the right side. Is done. That is, the upper spring 41 and the lower spring 41 </ b> B are accumulated through the rotating arm side link 44 by the raising operation of the planting work machine 6.

  The working cam side link 46 extends from the swing shaft 67 and the rear upper side of the swing shaft 67 and swings up and down as the swing shaft 67 rotates. And a rod 72 that extends from the end side of the rear connecting portion 71 toward the operating cam 31 and is connected to the rear fan-shaped portion 49.

  The rod 72 is provided with a rear interchangeable pin 73 on the end side, and the rear interchangeable pin 73 is inserted into the rear interchangeable hole 49 a formed in the rear fan-shaped portion 49, thereby operating cams. A side link 46 is connected to the operating cam 31. That is, in the operating body 31, the front fan part 48 is connected to the rotating arm 39 and the rear fan part 49 is connected to the operating cam side link 46.

  The rod 72 includes a bent portion 72a having a rear interchangeable pin 73 attached to the upper end side and a bent lower end side bent into an L shape, a fixed portion 72b fixed to the rear connecting portion 71, and the fixed portion 72b. And a connecting screw 72c that is slidably connected to the bent portion 72a and adjusts the connecting position of the connecting screw 72c and the bent portion 72a, thereby adjusting the overall length of the rod 72. it can.

  Accordingly, when the planting work machine 6 is lifted from a predetermined position by the automatic raising operation mechanism 50, the operation cam 31 is pushed forward through the rod 72, and the work machine lever 18 reaches the fixing hole 5a. The planting work machine 6 is stopped by this operation. In addition, by adjusting the length of the rod 72, the raised position of the planting work machine 6 where the operation of the work machine lever 18 is started can be adjusted.

  In addition, even if the rod 72 is operated by the raising / lowering drive of the planting work machine 6 in a state where the rod 72 is connected to the operation cam 31, within the range in which the rear accommodation pin 73 slides within the rear accommodation hole 49a, The operating cam 31 is not operated. Similarly, when the operation cam 31 (working machine lever 18) is operated in a state where the planting work machine 6 is fixed, the rod within the range in which the rear accommodation pin 73 slides in the rear accommodation hole 49a is also used. No operating force works on the 72 side.

  The rotating arm side link 44 and the operating cam side link 46 are linked separately from the forward rotation of the swing shaft 67 when the planting work machine 6 is raised above a predetermined position (linking means). ). Thereby, accumulation of the urging force to the tension spring 41 and the ascending stop of the planting work machine 6 that has risen to a predetermined position are operated by separate links. Therefore, the rotation operation to the control position of the rotation arm 39 by the rotation arm side link 44 and the operation cam by the operation cam side link 46 that operate as the planting work machine 6 rises to a predetermined height or more. The rotation operation of 31 can be performed simultaneously, and the raising / lowering range of the planting work machine 6 can be utilized effectively.

  With the above-described configuration, when the work implement lever 18 is swung back (upward), the contact portion of the operating cam 31 is swung forward, and the corresponding contact portion 51 is contacted accordingly. The hydraulic valve 37 is operated via the pin 36 and the valve arm 38. Thereby, the planting work machine 6 is raised by supplying oil from the hydraulic pump (not shown) to the elevating cylinder 10 side and extending the elevating cylinder 10.

  On the other hand, when the work implement lever 18 is swung forward (downward), the contact portion 51 of the operating cam 31 is swung backward, and accordingly, the corresponding contact portion 51 and the contact pin 36 are swung. Is released. Thereby, oil is discharged from the lifting cylinder 10 and the hydraulic pump by the dead weight of the planting work machine 6, the lifting cylinder 10 is contracted, and the planting work machine 6 is lowered. Further, when the working machine lever 18 is swung forward to the planting work machine position which is the foremost position, the planting clutch 6 is engaged and the planting work machine 6 is driven.

  Next, based on FIG. 6 thru | or 12, the interlocking | linkage of the automatic raising operation mechanism and automatic stop mechanism (lever return mechanism) comprised as mentioned above is demonstrated. 6 is a main part side view showing the work machine interlocking mechanism at the time of planting work, and FIG. 7 is a main part side view showing the work machine interlocking mechanism in a state where the planting work machine is lowered. FIG. 9 is a main part side view showing the work machine interlocking mechanism when the reverse gear is shifted, and FIG. 9 is a main part side view showing the work machine interlocking mechanism when the work machine lever is automatically operated to the raised position; FIG. 10 is a main part side view showing a work machine interlocking mechanism when the planting work machine is driven up, and FIG. 11 is a main part side view showing pressure accumulation of the tension spring during the up drive.

  First, when the shift lever 16 is operated forward, as shown in FIG. 6, when the work implement lever 18 is operated to the planting work position that is the foremost position, the planting work implement 6 is moved to the field. While descending to the position, the planting clutch of the planting work machine 6 is turned on and the planting work machine 6 is driven to perform the planting work.

  At this time, the front interchangeable pin 52 of the rotating arm 39 is in contact with the upper end of the front interchangeable hole 48a of the operating cam 31, and the rear interchangeable pin 73 of the rod 72 is on the lower end side of the rear interchangeable hole 49a of the operational cam 31. Since the contact pins 52 and 73 are slid in the connection holes 48a and 49a, only the work machine lever 18 and the operation cam 31 are operated rearward (upward), so that the planting work machine 6 It can be raised and the planting clutch can be turned off.

  That is, as shown in FIG. 7, when the working machine lever 18 is operated from the planting work position to the fixed position of the fixing hole 5a, the planting clutch is disengaged and the driving of the planting work machine 6 is stopped.

  Next, the automatic raising operation mechanism will be described with reference to FIGS. 6 or 7, when the traveling machine body 3 is stopped and turning is performed, when the speed change lever 16 is operated in reverse, the wire 61 is biased by the regulating spring 61 as shown in FIG. 8. Accordingly, the regulating member 42 is rotated downward and the contact between the regulating contact portion 42b of the regulating member 42 and the regulating portion 57 of the turning arm 39 is released.

  As a result, as shown in FIG. 9, the urging force stored by the upper spring 41 </ b> A and the lower spring 41 </ b> B causes the rotation arm 39 to rotate counterclockwise when viewed from the right side. In the rotating arm 39, when the front accommodation pin 52 reaches the upper end of the front accommodation hole 48a and the urging force is further applied, the rotation arm 39 moves the work implement lever 18 to the rearmost position via the operation cam 31 ( It swings automatically to the highest position, which is the upper position. Thereby, as shown in FIG. 10, the planting work machine is driven up.

  When the shift lever 16 is switched to the forward side, the regulating member 42 returns to the position where the rotating arm 39 is regulated by the urging force of the regulating spring 58.

  Next, as shown in FIG. 11, when the planting work machine 6 is raised to a predetermined height, the connecting rod 69 is operated downward via the rotating arm side link 44. By rotating the connecting rod 69 downward, the urging force of the upper spring 41A and the lower spring 41B is released, so that the turning arm 39 rotated counterclockwise as viewed from the right side is the upper spring 41A and the lower spring 41B. The rotating arm 39 is rotated clockwise against the urging force, and the urging force is accumulated in each tension spring 41 again.

  Further, when the rotating arm 39 rotates clockwise against the urging force of the tension spring 41, the restricting portion 57 of the rotating arm 39 and the restricting member 42 come into contact with each other. The restricting member 42 restricts the turning arm 39 from rotating by the urging force newly stored in the tension spring 41.

  That is, when the reverse operation is performed by the speed change lever 16, the work implement lever 18 is operated to the ascending position by using the urging force of the tension spring 41 that has been deformed in advance and stored the urging force, and the planting work device 6 is raised. Then, as the planting machine 6 is raised, the tension spring 41 is deformed and the urging force is accumulated again (automatic lifting operation mechanism 50). The automatic raising operation mechanism 50 automatically raises the planting work machine 6 due to other predetermined operations of the traveling machine body 3 such as the steering operation of the steering handle 13 instead of the reverse operation of the shift lever 16. You may comprise.

  Next, the automatic stop mechanism will be described with reference to FIG. When the planting machine is raised to a predetermined height, the automatic stop mechanism (lever return mechanism) is such that the push plate 66a of the lower link 66 has the lower end of the fixing portion 72b of the rod 72 of the operating cam side link 46 facing the front upper side. Push up. As a result, the rod 72 operates the work implement lever 18 to the front side via the operation cam 31, and thus the work implement lever 18 can be automatically operated to the fixed position. That is, when the planting work machine 6 is raised to a predetermined height, the planting work machine 6 is automatically operated to a predetermined position where the ascent of the planting work machine 6 stops (automatic stop mechanism).

  Next, the restraining mechanism will be described with reference to FIG. FIG. 13 is a side view of the main part showing the check mechanism. The check mechanism 75 includes a plate-like check member 76 that restricts the turning operation of the turning arm 39 to the side of raising the planting work machine 6 by the automatic raising operation mechanism 50, and a planting operation of the check member 76. An operation wire 77 that rotates according to the height position of the machine 6 and an elastic member 78 that urges the restraining member 76 toward the side that restricts the rotation of the rotation arm 39 are provided (FIG. 3 and FIG. 3). (See FIG. 13).

  The check member 76 extends in the vertical direction, and is formed on the lower end side, with a rotation fulcrum 76a formed on the lower side of the center, a wire connecting portion 76b connected to the operation wire 77 provided on the upper end side. Further, an attachment portion 76c to which one end side of the elastic member 78 is attached and an abutting portion 76d that abuts the rear end side of the rotating arm 39 on the center front side are formed to swing back and forth around the rotating fulcrum 76a. It is provided to be movable.

  As a result, the restraining member 76 biases the lower mounting portion 76b to the rear side by the biasing force of the elastic member 78, so that the abutting portion 76a becomes the front pivot arm. It is biased toward the 39 side. Incidentally, in the illustrated example, the rotation fulcrum 76a of the restraining member 76 and the regulation shaft 42a serving as the pivot fulcrum of the regulation member 42 are arranged on the same axis.

  The operation wire 77 has one end connected to the wire connecting portion 76a and the other end connected to the planting work machine 6 side. When the planting work machine 6 is lowered to a predetermined non-working height set at a position lower than the predetermined height, the other end side of the operation wire 77 is biased by the elastic member 78. Therefore, the contact between the restraining member 76 and the rotating arm 39 is released.

  On the other hand, the operation wire 77 is rotated by the urging force of the elastic member 78 because the operation wire 77 bends when the planting work machine 6 is lifted and operated above the non-working height. Moved. As a result, the check member 76 is brought into contact with the rear end side of the turning arm 39 so that the turning operation of the turning arm 39 is checked (restricted).

  An adjustment portion 82 for adjusting the length of the operation wire 77 is provided on the wire connecting portion 76 a side of the operation wire 77. By adjusting the connecting position of the operation wire 77 by the adjusting unit 82, the height position of the non-working height at which the automatic ascent operation mechanism 50 starts to restrain the automatic raising of the planting work machine 6 can be changed. it can.

  Regardless of the raising / lowering position of the planting work machine 6, the adjusting unit 82 always regulates the pivoting operation of the pivoting arm 39 by the restraining member 76, thereby releasing the regulating member 42 (automatic lifting operation mechanism 50). The automatic operation of the work machine lever 18 due to the above can be switched to a check state in which the automatic operation is always restricted.

  According to the check mechanism 75 configured as described above, even when the shift lever 16 is operated to the reverse side and the automatic lifting operation mechanism 50 releases the restriction of the rotation arm 39 by the restriction member 42, When the planting work machine 6 is not less than the non-working height, in other words, when the planting work machine 6 is located between the predetermined height (the highest position) and the non-working height, the planting work machine 6 is rotated by the check member 76. The rotation of the moving arm 39 (operation to the lifting operation position of the work machine lever 18 by the automatic lifting operation mechanism 50) can be checked (restricted).

  In other words, when the planting work machine 6 that has been raised to the highest position is kept standing for a long time or moved and travels, the planting work machine 6 is discharged from the lifting cylinder (hydraulic cylinder) 10 by its own weight. Even if it is oiled and the height position of the planting work machine 6 is slightly lowered, the automatic operation of the work machine lever 18 by the automatic raising operation mechanism 50 is restrained by the restraining mechanism 75. It is possible to efficiently prevent the work implement lever 18 from being automatically operated at an unnecessary timing by the automatic raising operation mechanism 50.

  In addition, when the adjusting unit 82 is switched to the check state, the automatic operation of the work machine lever 18 by the automatic raising operation mechanism 50 is not executed regardless of the height position of the planting work machine 6, so that it moves on the verge. In some cases, the shift lever 16 can be operated backward while the planting work machine 6 is lowered to the work position (lower than the non-work position).

3 traveling machine body 4 lifting link 6 planting work machine 18 working machine lever 41 tension spring (elastic member)
42 Restricting member 42 Release mechanism 44 Rotating arm side link (linkage mechanism)
46 Actuating cam side link (linkage mechanism)
50 Automatic ascending operation mechanism 75 Checking means 82 Adjusting unit

Claims (3)

A planting work machine (6) connected to the traveling machine body (3) through a lifting link (4) so as to be lifted and lowered;
A working machine lever (18) that swings the planting work machine (6) up and down;
An elastic member (41) for biasing the work machine lever (18) toward the raising operation position, which is an operation position for raising the planting work machine (6);
A restricting member (42) for restricting the swing operation from the stop operation position to the ascending operation position of the work implement lever (18) by the elastic member (41);
By providing a release mechanism (43) for releasing the restriction by the restriction member (42) with a predetermined operation of the traveling machine body (3),
An automatic raising operation mechanism (50) for automatically raising the planting work machine (6) according to a predetermined operation of the traveling machine body (3);
As the planting work machine (6) rises to a predetermined height, the work machine lever (18) swung to the raising operation position is planted against the elastic force of the elastic member (41). A linkage mechanism (6) that mechanically links the planting work machine (6) and the work machine lever (18) so as to swing to a stop operation position that is an operation position where the lifting and lowering of the work machine (6) stops. 46) and
In a transplanter equipped with
When the planting work machine (6) is lifted and lowered from a non-working height, which is a lifting height in a non-working state set lower than the predetermined height, to the predetermined height, the traveling A check means (75) is provided for checking the automatic lifting of the planting work machine (6) due to the release of the restriction of the release mechanism (43) even if a predetermined operation of the machine body (3) is performed   The transplanter according to claim 1, wherein the restraining means (75) includes an adjusting portion (82) for adjusting a position of the non-working height.   The said adjustment part (82) was comprised so that it could set to the check state which always checks the automatic raise of a planting work machine (6) by a check means (75) irrespective of the raising / lowering position of a planting work machine (6). The transplanter according to claim 2.

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