JP2005341814A - Walking type tending machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a walking type tending machine capable of rapidly and safely corresponding to unexpected accident such as falling over. <P>SOLUTION: The walking type tending machine is equipped with a supporting part, a turning shaft part turnably supported by the supporting part and a turning and driving part for turning and driving the turning shaft part and the walking type tending machine is constituted so as to carry out operation by attaching a resisting rod to the supporting part, pressing the lower end of the resisting rod to a field and moving the resisting rod while receiving resistance from the field. In the walking type tending machine, pressing motion of the resisting rod to the field is interlocked with driving motion of the turning and driving part and pressure-releasing motion of the resisting rod to the field is interlocked with stop motion of the turning and driving part. As a result, when operation is started, driving motion of the turning and driving part can be carried out by pressing the lower end of the resisting rod to the field and operation can simply and rapidly be started. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a walking management machine such as a walking tiller.

  Conventionally, as one form of a walking type management machine, a support portion, a rotation shaft portion rotatably supported by the support portion, and a rotation drive portion that electrically drives the rotation shaft portion to rotate And a handle is provided on the support portion, and a main switch of the rotation drive portion is provided on the handle (see, for example, Patent Document 1).

In such a walking type management machine, the rotation drive unit is driven and stopped by operating the main switch.
Japanese Patent No. 3374410

  However, in the above-mentioned walking type management machine, even when an operator grips the handle and works, even if he / she wants to stop the turning drive unit suddenly, he / she is conscious of the main switch provided on the handle. Since the rotation drive unit cannot be stopped unless operated quickly, there is a possibility that it cannot respond to an unexpected accident such as the above-mentioned accident quickly and safely.

  Therefore, the present invention includes a support portion, a rotation shaft portion that is rotatably supported by the support portion, and a rotation drive portion that rotationally drives the rotation shaft portion. In a walking-type management machine in which a resistance rod is attached and the lower end of the resistance rod is pressed against the field and moved while receiving resistance from the field, the resistance bar is pressed against the field. A walking type management machine is provided that links the drive operation of the rotation drive unit with the operation of pressing the resistance bar to the field and the stop operation of the rotation drive unit. is there.

  The present invention is also characterized by the following configuration.

  (1) The resistance bar is attached to a fixed side resistance bar forming piece that extends in the vertical direction and is supported in a fixed state by the support part, and is attached to a lower end portion of the fixed side resistance bar forming piece so as to be movable forward and backward with respect to the field. When the lower end of the resistance bar is pressed against the field, the movable side resistance bar forming piece is moved backward by the reaction force received from the field, and the rotation driving unit is driven. When the lower end of the resistance bar is released from the field, the movement of the movable resistance bar forming piece to the field and the movement of the rotation drive unit are interlocked. Was it.

  (2) The electric circuit unit that electrically drives the rotation driving unit is provided with an advancing / retreating operation detecting means for detecting the advancing / retreating operation of the movable resistance rod forming piece, and the movable resistance rod is connected via the advancing / retreating operation detecting means The advance / retreat operation of the formed piece and the drive / stop operation of the rotation drive unit are linked.

  (3) A rotation drive unit that drives the rotation shaft unit is provided with a clutch unit, and the movable side resistance bar forming piece is interlocked with the clutch unit via an interlocking mechanism to move the movable side resistance bar forming piece forward and backward. And the drive / stop operation of the rotary drive unit.

  (1) The present invention according to claim 1 includes a support portion, a rotation shaft portion rotatably supported by the support portion, and a rotation drive portion that rotationally drives the rotation shaft portion. In the walking type management machine, the resistance rod is attached to the support portion, the lower end portion of the resistance rod is pressed against the field, and the work is performed while being moved while receiving resistance from the field. The operation of pressing the field to the field and the driving operation of the rotation drive unit are linked, and the operation of releasing the pressing of the resistance bar to the field and the operation of stopping the rotation drive unit are linked.

  In this way, the pressing operation of the resistance bar to the field and the driving operation of the rotation driving unit are linked, and the pressing release operation of the resistance bar to the field and the stopping operation of the rotation driving unit are linked. Therefore, when starting the work, if the lower end portion of the resistance bar is pressed against the field, the rotation drive unit can be driven and the work can be started easily and quickly.

  Then, when an unexpected accident such as the operator falls during the operation, the operator releases his / her hand from the support part and presses the lower end of the resistance bar to the field via the support part. If is released, the rotation drive unit can be quickly stopped. Therefore, it is possible to quickly and safely respond to an unexpected accident such as falling.

  After that, when the work is resumed, if the lower end portion of the resistance bar is pressed against the field, the rotation drive unit can be driven, and the work can be resumed easily and quickly. .

  (2) In the present invention according to claim 2, the resistance bar extends in the vertical direction and is fixed to the support portion and fixedly supported by the support portion, and the lower end portion of the fixed side resistance rod formation piece. And a movable resistance rod forming piece attached to the field so as to be able to move forward and backward, and when the lower end of the resistance bar is pressed against the field, the movable resistance rod forming piece moves backward due to a reaction force received from the field. The operation and the operation driven by the rotation drive unit are interlocked, and when the lower end portion of the resistance bar is released from the field, the movable side resistance bar forming piece advances to the field and the rotation drive. It is linked with the operation that the part stops.

  In this way, the operation of pressing and releasing the lower end of the resistance bar against the field allows the movable side resistance bar forming piece to reliably move forward and backward with respect to the field, and interlocks with the movable side resistance bar forming piece. It is possible to reliably drive and stop the movable drive unit. As a result, a prompt and safe response to an unexpected accident can be ensured.

  (3) According to the third aspect of the present invention, the electric circuit unit that electrically drives the rotation driving unit is provided with an advancing / retreating operation detecting means for detecting the advancing / retreating operation of the movable resistance rod forming piece, The advancing / retreating operation of the movable resistance rod forming piece and the driving / stopping operation of the rotation drive unit are linked via the detecting means.

  In this way, the advancing / retreating operation detecting means detects the advancing / retreating operation of the movable resistance rod forming piece, and the rotation drive unit is driven / stopped via the electric circuit unit. The rotation drive unit can be reliably driven and stopped.

  (4) In the present invention according to claim 4, a clutch portion is provided in the rotation drive portion that drives the rotation shaft portion, and the movable side resistance bar forming piece is interlocked and connected to the clutch portion via an interlocking mechanism. The advancing / retreating operation of the movable resistance rod forming piece and the driving / stopping operation of the rotation driving unit are linked.

  In this way, the advance / retreat operation of the movable resistance rod forming piece and the drive / stop operation of the rotation drive unit are interlocked via the clutch unit and the interlocking mechanism, so that the structure is simplified and reliably rotated. The drive unit can be driven / stopped.

  A shown in FIG. 1 and FIG. 2 is a walking type tiller as a first embodiment which is a walking type management machine according to the present invention. The walking type tiller A includes a support unit 1 and a support unit 1. The tilling shaft portion 2 is rotatably supported by the rotation shaft portion 2, and the rotation drive portion 3 (see FIG. 6) that is built in the tillage shaft portion 2 and drives the tilling shaft portion 2 to turn.

  Below, the structure of the support part 1, the tilling axis | shaft part 2, and the rotation drive part 3 which are the structural members of the walking type tiller A as 1st Embodiment is demonstrated concretely.

[Walking field cultivator as the first embodiment]
(Description of support part 1)
As shown in FIGS. 1 and 2, the support portion 1 includes a support portion body 4 that supports the tilling shaft portion 2, a support portion intermediate body 5 that extends upward from the support portion body 4, and the support portion intermediate body. 5 and a gripping body 6 extending rearward from the upper end of the grip 5. The gripping body 6 serves as a handle.

  And the support part main body 4 is formed in the front gate type | mold from the left-right pair of upper and lower extension pieces 7,7 and the left-right extension piece 8 erected between the upper end parts of both the upper and lower extension pieces 7,7. The elongated pieces 7, 7, and 8 are each formed in a hollow pipe shape.

  Further, the support part intermediate body 5 includes a support base 9 fixed to the left and right extension pieces 8 of the support part main body 4, an intermediate main body 10 having a lower end part fixed to the support base 9 and extending vertically. A resistance rod 12 attached to the lower part of the intermediate body 10 via an attachment body 11 is provided.

  Here, as shown in FIG. 1, the resistance bar 12 is operated by pressing the lower end portion against the field G and moving while receiving resistance from the field G. In addition, the pressing operation of the resistance rod 12 to the field G and the driving operation of the rotation driving unit 3 are interlocked, and the pressing release operation of the resistance rod 12 to the field G and the stopping operation of the rotation driving unit 3 are interlocked. ing.

  That is, as shown in FIG. 1, the resistance rod 12 includes a fixed resistance rod forming piece 80 supported in a fixed state on the intermediate body 10 via a mounting body 11, and a lower end portion of the fixed resistance rod forming piece 80. And a movable resistance rod forming piece 81 attached to the field G so as to freely advance and retreat.

  The fixed-side resistance bar forming piece 80 is formed by bending a bottomed cylindrical body extending in the vertical and rearward directions from the middle part to the rear in a “<” shape, and a plurality of In the embodiment, three) vertical position adjustment holes 82 are formed at intervals in the vertical direction, while fixing pin holes 83 are formed in the attachment body 11, and the fixed pin holes 83 and the vertical position adjustment holes 82 are formed. The fixed side resistance bar forming piece 80 is fixed so that the vertical position can be adjusted by inserting the fixing pin 84 into the corresponding holes 83 and 82.

  Moreover, in the fixed resistance rod forming piece 80, an advancing / retreating operation detection switch 85 is provided as an advancing / retreating operation detecting means for detecting the advancing / retreating operation of the movable resistance rod forming piece 81. A switch contact terminal 85b protrudes below the main body 85a.

  The movable resistance rod forming piece 81 is formed in a bar shape extending in the vertical direction, and the upper portion 81a is inserted into the fixed resistance rod forming piece 80 through the insertion hole 86 formed in the bottom portion 80a of the fixed resistance rod forming piece 80. A restoring pressure spring 88 is wound around the outer peripheral surface of the switch contact terminal 85b and the upper part 81a between the hook-shaped locking piece 87 formed in the upper part 81a and the switch body 85a. Yes.

  As shown in FIG. 3, an electric circuit includes a battery B, an electric motor M of a rotation driving unit 3 described later, a main switch 32 provided in a battery case 13 described later, and the advance / retreat operation detection switch 85 described above. They are connected in series via the section 89, and the advance / retreat operation of the movable resistance rod forming piece 81 and the drive / stop operation of the electric motor M are linked via the advance / retreat operation detection switch 85.

  In this way, when the main switch 32 is turned on and the lower end portion 81b of the resistance bar 12 is pressed against the field G, the restoring pressure is applied by the reaction force that the movable resistance bar forming piece 81 receives from the field G. The operation of turning back and forth against the elastic biasing force of the spring 88 to turn on the advance / retreat operation detection switch 85 and the operation of driving the electric motor M are interlocked, and the lower end 81b of the resistance rod 12 is An operation for turning off the advance / retreat operation detection switch 85 by moving the movable resistance rod forming piece 81 to the field G by the elastic biasing force of the restoring pressure spring 88 when the pressure is released from the field G. The operation of stopping the electric motor M is linked.

  Accordingly, when starting the work, if the lower end portion 81b of the resistance bar 12 is pressed against the field G, the electric motor M can be driven and the work can be started easily and quickly. .

  When an unexpected accident such as the operator falls during the work, the worker releases his / her hand from the gripping body 6 as a handle, and the lower end 81b of the resistance bar 12 is passed through the gripping body 6. The electric motor M can be quickly stopped by releasing the operation that presses the farm field G.

  As a result, it is possible to respond quickly and safely to unexpected accidents such as falling.

  After that, when restarting the work, if the lower end 81b of the resistance bar 12 is pressed against the field G, the electric motor M can be driven and the work can be restarted easily and quickly. Can do.

  In addition, the start / stop operation of the rotation drive unit 3 by the advance / retreat operation detection switch 85 can be performed by turning on the main switch 32 provided in the battery case 13, and the main switch 32 is turned off when being stored. Thus, even if the advance / retreat operation detection switch 85 is turned on, the rotation drive unit 3 is not started.

  The support base 9 supports a battery case 13 containing the battery B (see FIG. 3) and the intermediate body 10.

  The intermediate body 10 includes a hollow pipe-shaped lower half piece 14 extending in the vertical direction, a hollow pipe-shaped upper half piece 15 that is detachable in the lower half piece 14 and extends in the vertical direction, And an adjusting body 16 for adjusting the expansion and contraction of the upper and lower half pieces 15 and 14.

  As shown in FIGS. 4 and 5, the adjusting body 16 has a middle portion 17a of the sandwiching piece 17 formed in an arc shape along the outer peripheral surface of the upper portion of the lower half piece 14, and the middle portion 17a of the middle portion 17a. The left and right end portions 17b, 17b are parallel to the left and right and are extended to the rear so as to face each other. The left and right end portions 17b, 17b are passed through the clamping bolts 18 with the axis line in the left and right direction, and the right end A female screw piece 19 is screwed to the tip of the clamping bolt 18 that penetrates outward from the portion 17 b, and a rotating operation piece 20 is attached to the female screw piece 19.

  Here, a plurality of (three in this embodiment) longitudinal grooves 21, 21, 21 extending in the vertical direction are formed on the upper portion of the lower half piece 14 at intervals in the circumferential direction. The upper part of the half piece 14 can be expanded and contracted in the radial direction.

  In this way, by rotating the female screw piece 19 forward / reversely via the turning operation piece 20, the left and right end portions 17b, 17b are adjusted to approach / separate via the clamping bolt 18, The upper portion of the lower half piece 14 can be adjusted for expansion / contraction.

  Therefore, when adjusting the expansion and contraction of the upper half piece 15 inserted into the lower half piece 14, the diameter of the lower half piece 14 is adjusted by expanding the lower half piece 14 by operating the rotating operation piece 20 as described above. The upper half piece 15 can be fixed by sliding the upper half piece 15 appropriately in the vertical direction, and then adjusting the diameter of the lower half piece 14 by operating the turning operation piece 20.

  Further, in the middle part of the lower half piece 14, a middle part of the battery case locking body 22 extending in the left-right direction is pivotally supported via a pivot pin 23 having an axis line in the front-rear direction. A hook-shaped locking piece 24 is formed at the left end of the case locking body 22, while an operation piece 25 is formed at the right end of the battery case locking body 22.

  Moreover, a torque spring 26 is attached to the pivot pin 23, and the battery case locking body 22 is locked by the torque spring 26 in the locking direction of the locking piece 24 (counterclockwise around the pivot pin 23 in FIG. 5). It is elastically biased to rotate. Reference numeral 34 denotes an upward movement restricting pin for restricting upward movement of the battery case 13.

  Here, in the central portion of the rear surface of the battery case 13, a concave portion 27 into which the lower half piece 14 can be fitted is formed by extending in the vertical direction, and the rear left side portion with the concave portion 27 as a center. A pocket-shaped locking piece receiver 28 is provided on the rear side, and an operation piece receiver 29 is provided on the right side of the rear surface.

  Then, an engaging piece 30 is provided to project downward at the front lower center of the battery case 13, while a handle piece 31 is provided at the upper end of the battery case 13.

  In this way, when the battery case 13 is mounted on the support base 9, the battery case 13 is placed on the support base 9 and is engaged with the engagement receiving piece 33 provided at the front end of the support base 9. The mating piece 30 is engaged, and the recess 27 of the battery case 13 is fitted to the lower half piece 14.

  At this time, as shown by a one-dot chain line in FIG. 5, the operation piece 25 of the battery case locking body 22 is pushed downward against the elastic bias of the torque spring 26 to lock the battery case locking body 22. The piece 24 is pulled upward so that the locking piece receiver 28 does not interfere with the locking piece 24.

  Then, after fitting the concave portion 27 of the battery case 13 to the lower half piece 14 and then releasing the hand from the operation piece 25, the battery case locking body 22 is rotated by the elastic biasing force of the torque spring 26. While the locking piece 24 is locked to the locking piece receiver 28, the operation piece 25 contacts the operation piece receiver 29 from below, and the rotation of the battery case locking body 22 is restricted.

  As a result, the battery case 13 is locked to the locking piece 24 via the locking piece receiver 28 and is fixed to the support base 9 and the lower half piece 14, and the battery case 13 is placed on the support base 9. Easy to install.

  Further, when removing the battery case 13 from the support base 9, the battery case 13 can be easily removed by following the procedure opposite to the attachment procedure described above.

(Description of tillage shaft 2)
As shown in FIGS. 1, 2, and 6, the tilling shaft portion 2 has its axis line directed in the left-right direction to the lower end portions of the pair of left and right upper and lower extension pieces 7, 7 provided on the support body 4. A pair of left and right rotation support shafts 40 and 40 are attached, and a tilling shaft 41 is rotatably installed between the both rotation support shafts 40 and 40.

  Here, a male threaded portion 53 is formed at the outer end of the rotating support shaft 40, and the male threaded portion 53 is inserted into an insertion hole 54 formed at the lower end of the vertically extending piece 7, A female screw body 56 is screwed to a portion of the male screw portion 53 protruding outward from 54 via a washer 55.

  In this manner, by attaching / detaching the female screw body 56, the tilling shaft 41 can be attached / detached to / from the support body 4 via the rotation support shafts 40, 40.

  In addition, as shown in FIG. 1, the axis of the rotation support shaft is disposed in the vicinity of a virtual extension line of the axis of the intermediate body 10 that extends in the vertical direction in a side view.

  The tilling shaft 41 is rotatably attached to the outer peripheral surfaces of the respective rotation support shafts 40, 40 via bearings 42, 42, between the outer peripheral edge portions of the both end wall bodies 43, 43. A cylindrical tilling shaft main body 44 is interposed, and a plurality of tilling claws 46 are attached to the outer peripheral surface of the tilling shaft main body 44 via a tilling claw mounting piece 45 at intervals in the same circumferential direction. Also attached with a gap. 47 is a tillage claw mounting bolt.

  Further, intrusion prevention bodies 48 and 48 such as mud are attached to the respective rotation support shafts 40 and 40 to prevent the mud and the like from entering the tilling shaft 41.

  That is, the muddy soil intrusion prevention body 48 is attached to the outer peripheral surface of the rotation support shaft 40 and is attached to the ring-shaped end wall body covering piece 49 that covers the outer side of the end wall body 43, and the end wall body covering piece 49. A cylindrical rotating shaft main body covering piece 50 that extends from the periphery to the side of the tilling shaft main body 44 and covers the outer periphery of the outer peripheral surface of the tilling shaft main body 44 in a superposed state, and is attached to the end wall body covering piece 49 The blocking wall 52 blocks the space 51 between the end wall covering piece 49 and the end wall 43.

  In this way, even if mud or the like enters from the gap between the inner peripheral surface of the rotary shaft main body covering piece 50 and the outer peripheral surface of the tilling shaft main body 44, the intruding mud or the like is rotated by the blocking piece 52. Is prevented from reaching the outer peripheral surface, and the mud or the like invades into the rotation drive unit 3 to be described later, thereby preventing the rotation drive unit 3 from being damaged. .

(Description of the rotation drive unit 3)
As shown in FIG. 6, the rotation drive unit 3 includes an electric motor M and a speed reduction mechanism 61. The electric motor M has a right end connected to the right rotation support shaft 40, and a left end. The drive shaft 62 protrudes from the portion toward the left side, and the drive shaft 62 and the tilling shaft main body 44 are coupled to each other via the speed reduction mechanism 61.

  The speed reduction mechanism 61 is a planetary gear mechanism that performs two-stage speed reduction. A first sun gear 63 is coaxially attached to the drive shaft 62, and a first inner gear 64 is attached to the outer periphery of the first sun gear 63 as a gear support 65. A plurality of first primary gears 66 are meshed between the first inner gear 64 and the first sun gear 63, and these first primary gears 66 are connected to the carrier 67. Are connected together.

  The carrier 67 is provided with a second sun gear 68, and a plurality of second primary gears 69 are engaged with the second sun gear 68, and each second primary gear 69 is connected to the gear support 65 and the left rotation. The second inner gear 71 is engaged with the outer periphery of the second primary gear 69 while being rotatably attached to a flange-shaped gear support piece 70 formed on the moving support shaft 40. The outer peripheral surface is fixed to the inner peripheral surface of the tilling shaft main body 44. 72 is a first primary gear support shaft, 73 is a second sun gear support shaft, and 74 is a second primary gear support shaft.

  Here, the drive shaft 62, the first sun gear 63, the second sun gear 68, and the second sun gear support shaft 73 are arranged on the same axis.

  Further, as shown in FIGS. 2 and 6, the electric cord 75 of the electric circuit unit 89 connecting the electric motor M to the battery B is provided in the hollow pipe-shaped support unit body 4 and the right pivot. Wiring is performed through a cord insertion hole 76 formed at the center of 40.

  The embodiment of the present invention is configured as described above. In the present embodiment, the following actions and effects occur.

  (1) Since the rotation shaft 3 that rotatably supports the tiller shaft 2 is built in the tiller shaft 2 that is rotatably supported by the support portion 1, the power transmission mechanism is minimized. It can be made compact, and the walk-type cultivator A itself can be made lightweight and compact.

  Therefore, it can be easily used by women and elderly people in ordinary households and can easily perform tillage work. Moreover, since the walking type tiller is compact, there is no shortage of storage space for the walking type tiller A even in ordinary households.

  (2) Since the tillage shaft portion 2 is detachably attached to the support portion 1, the necessary tillage shaft portion can be obtained by preparing a plurality of the tillage shaft portions 2 including the rotation drive portions 3 having different driving forces. The required tillage work can be appropriately performed by simply changing to 2, and maintenance of the tiller shaft portion 2 can be easily performed.

  (3) Since the tillage shaft portion 2 is driven by the electric motor M, generation of noise and vibration can be suppressed and generation of exhaust gas can be eliminated.

  (4) Since the battery B, which is a relatively heavy object, is attached to the lower portion of the support portion 1, the weight for suppressing the battery B from jumping up due to the reaction force that the tilling shaft portion 2 receives from the field via the tilling claws 46. Can be used effectively, the tillage function can be stabilized, and the tillage work efficiency can be improved.

  (5) Since the axis of the rotation support shaft 40 is disposed in the vicinity of the virtual extension line of the axis of the intermediate body 10 extending in the vertical direction in a side view, the grip provided on the upper end of the intermediate body 10 The handle operation performed by gripping the body 6 can be easily performed, and the operator's fatigue can be reduced. As a result, it is possible for a general household woman and an elderly person to perform tillage work for a long time.

  (6) Since the intermediate body 10 can be vertically adjusted by the adjustment body 16, the operator can plow in an easy posture by adjusting the intermediate body 10 according to the physique of the operator. Work can be done. As a result, the worker's fatigue can be reduced also from this point.

  Further, at the time of storage, the storage space of the walking type tiller A can be reduced by contracting the intermediate main body 10 to the shortest state by the adjusting body 16.

  Next, the walking type tiller A as the second embodiment will be described with reference to FIGS. 7 and 8.

[Walking field cultivator as the second embodiment]
As shown in FIG. 7, the walking type tiller A as the second embodiment has the same basic structure as the walking type tiller A as the first embodiment described above. The rotation operation associated with the pressing operation to the rotation and the drive operation of the rotation drive unit 3 are interlocked with each other, the restoration rotation operation associated with the release operation of the resistance rod 12 to the field G and the stop of the rotation drive unit 3 It differs in that the movement is linked.

  That is, as shown in FIG. 8, the resistance rod 12 is pivotally supported by a pivot pin 36 having an axis line in the left-right direction via a pivot piece 35 on a mounting body 11 provided at the lower portion of the intermediate body 10. The pivot pin 36 is pivotable in the front-rear direction.

  Further, a rotation motion detection switch 37 is provided at the lower part of the intermediate body 10, and the resistance rod 12 receives the resistance of the field G along with the pressing operation to the field G. Is turned counterclockwise (direction a), the upper end portion of the pivot piece 35 turns on the turning operation detection switch 37 as indicated by an imaginary line in FIG. I am doing so. 39 is a stopper piece.

  Further, a restoring tension spring 38 is interposed between the rear end portion of the support base 9 and the lower end portion of the pivot piece 35, and when the pressing operation of the resistance bar 12 to the field G is released, The restoring tension spring 38 rotates the resistance rod 12 around the pivot pin 36 in the clockwise direction in the side view shown in FIG. 8, and the upper end portion of the pivot piece 35 detects the rotation operation. The switch 37 is turned off.

  Here, the rotation motion detection switch 37 is connected in series via the battery B, the electric motor M, the main switch 32, and the electric circuit unit 89, and the resistance rod 12 is connected via the rotation motion detection switch 37. The rotation operation and the driving / stopping operation of the electric motor M are interlocked.

  In this way, when the main switch 32 is turned on and the lower end of the resistance bar 12 is pressed against the field G, the elasticity of the restoring tension spring 38 due to the reaction force that the resistance bar 12 receives from the field G. The operation of turning the rotational motion detection switch 37 by turning in the direction a against the urging force and the operation of driving the electric motor M are interlocked with each other, and the lower end portion of the resistance rod 12 is moved from the field G. When the pressing is released, the same resistance rod 12 is rotated and returned with respect to the field G by the elastic biasing force of the restoring tension spring 38, the operation for turning off the rotation operation detection switch 37, and the electric motor M is stopped. The movement is linked.

  Next, a walking type tiller A as a third embodiment will be described with reference to FIG.

[Walking field cultivator as the third embodiment]
As shown in FIG. 9, the walking type tiller A as the third embodiment interlocks and connects a pair of left and right wheels 92, 92 via an axle 91 to the lower end of a mission case 90 extending in the vertical direction. Extend the fuselage frame 93 forward from the middle of the mission case 90, mount the engine 94 on the fuselage frame 93, and link the engine 94 and the upper part of the mission case 90 via the linkage case 95 The support unit 1 is connected to the upper end of the mission case 90.

  The upper half of the tillage transmission case 97 is connected to the middle part of the rear side of the mission case 90 via a hitch body 96 as a rotation drive unit extending in the vertical direction. While the upper part of 90 is interlocked and connected via a transmission case 98, a tilling claw 100 is attached to the lower end part of the mission case 90 via a tilling shaft 99 as a rotating shaft part.

  The resistance rod 12 is attached to the attachment body 11 extended rearward from the tillage transmission case 97. The resistance rod 12 has the same basic configuration as the resistance rod 12 described above, but drives the tillage shaft 99. The tiller transmission case 97 is provided with a clutch part 101, and the movable part resistance rod forming piece 81 is linked to the clutch part 101 via an interlocking arm 102 as an interlocking mechanism. 81 is different in that the forward / backward movement of 81 and the drive / stop action of the tillage transmission case 97 are linked.

  That is, the fixed resistance rod forming piece 80 is formed in a cylindrical shape extending in the vertical direction, and the movable resistance rod forming piece 81 is inserted into the fixed resistance rod forming piece 80 to form the movable resistance rod. The upper portion 81a of the piece 81 is interlocked and connected by a connecting pin 104 through a long hole 103 formed in the rear end portion of the interlocking arm 102, while the lower end portion 81b of the movable side resistance rod forming piece 81 is formed as a fixed resistance rod. It projects downward from the lower end of the piece 80. Reference numeral 105 denotes a restoring tension spring interposed between the fixed resistance rod forming piece 80 and the movable resistance rod forming piece 81.

  In this way, the advancing / retreating operation (vertical movement) of the movable resistance rod forming piece 81 and the driving / stopping operation of the tillage transmission case 97 are interlocked via the clutch portion 101 and the interlocking arm 102. It is possible to simply and reliably drive and stop the tillage transmission case 97.

BRIEF DESCRIPTION OF THE DRAWINGS Side explanatory drawing of the walk-type tiller as 1st Embodiment which concerns on this invention. The front view of the tillage device. Electrical circuit diagram. The cross-sectional top view of a support part. The back explanatory drawing of the support part. The cross-sectional front view of a cultivation shaft part. Side surface explanatory drawing of the walk type tillage machine as 2nd Embodiment. Explanatory side explanatory drawing of the principal part of the walk type tillage machine. Side surface explanatory drawing of the walk type tillage machine as 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS A Tillage device 1 Support part 2 Plowing shaft part 3 Rotation drive part 4 Support part main body 5 Support part intermediate body 6 Grasping body

Claims (4)

A support portion; a rotation shaft portion rotatably supported by the support portion; and a rotation drive portion that rotationally drives the rotation shaft portion. A resistance rod is attached to the support portion, In the walking-type management machine that presses the lower end of the resistance rod against the field and moves while receiving resistance from the field,
A walking characterized in that the pressing operation of the resistance bar to the field and the driving operation of the rotation driving unit are linked, and the pressing release operation of the resistance bar to the field and the stopping operation of the rotation driving unit are linked. Type management machine. The resistance rod includes a fixed resistance rod forming piece that extends in the vertical direction and is supported in a fixed state by the support portion, and a movable resistance that is attached to the lower end portion of the fixed resistance rod forming piece so as to be movable forward and backward with respect to the field. Comprising a bar forming piece,
When the lower end of the resistance bar is pressed against the field, the movement of the movable resistance bar forming piece that is retracted by the reaction force received from the field is linked to the operation of the rotation drive unit, and the lower end of the resistance bar The walking according to claim 1, wherein when the pressing portion is released from the field, the movement of the movable-side resistance bar forming piece is advanced with respect to the field and the movement of the rotation drive unit is stopped. Type management machine.   The electric circuit unit that electrically drives the rotation driving unit is provided with an advance / retreat operation detecting means for detecting the advance / retreat operation of the movable resistance rod forming piece, and the movable resistance rod forming piece is The walking type management machine according to claim 2, wherein the advancing / retreating operation and the driving / stopping operation of the rotation drive unit are linked.   A clutch drive is provided in the rotation drive unit that drives the rotation shaft, and the movable resistance rod forming piece is interlocked with the clutch portion via an interlocking mechanism to move the movable resistance rod forming piece forward and backward. The walking type management machine according to claim 2, wherein the driving / stopping operation of the driving unit is interlocked.

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