JP4249694B2 - Tillage equipment - Google Patents

Description

  The present invention relates to a walking type tillage device.

  Conventionally, as one form of a walking type tillage device, a mission case is supported on the body frame, a traveling wheel is linked to the mission case, and a tilling shaft is linked to the mission case via a rotary case. In addition, there is one in which the transmission case is linked to an electric motor provided on the body frame via a transmission mechanism, and a handle bar is extended from the rear end of the body frame to the rear upper side (for example, a patent) Reference 1).

In this way, by driving the electric motor, the traveling wheel and the tilling shaft can be rotated, and the operator holds the tip of the handlebar and walks to the tilling shaft while walking. Tilling work can be performed by the attached tilling claw.
JP 2001-169602 A

  However, in recent years, the number of people who perform kitchen gardens has increased, and in ordinary households, even conventional walking type tillage devices sometimes lack storage space.

  Therefore, it has been desired to develop a small and light tillage device that is light and compact, and that can be easily used by women and elderly people in general households.

Therefore, in the present invention, a support portion and a tilling shaft portion rotatably supported by the support portion are provided, and the support portion is formed by extending the intermediate body in the vertical direction. A tilling device provided with a grip at the upper end portion to serve as a handle, the intermediate body includes a fixed intermediate forming piece disposed on the tilling shaft portion side and a movable intermediate forming piece disposed on the handle side, the movable intermediate formed piece, forms a telescopic slide along a fixed intermediate forming member, reducing the use position to separate the handle the movable intermediate formed piece is extended slide from tilling shaft portion, the movable intermediate formed piece It is possible to change the position between the storage position in which the handle is moved close to the tilling shaft , and the tilling shaft is provided with electric drive means, and the electric drive means has a main switch in the power source. Connected through the power supply circuit The main switch includes a detection piece disposed in the fixed intermediate formation piece through a detection piece advance / retreat hole formed in the fixed intermediate formation piece, and moves the movable intermediate formation piece to the storage position to move the intermediate position. There is provided a tillage device characterized in that a detection piece is pressed with a formed piece to forcibly turn off a main switch .

In the present invention, a support portion and a tilling shaft portion rotatably supported by the support portion are provided, and the support portion is formed by extending the intermediate body in the vertical direction, and an upper end portion of the intermediate body. The intermediate body has a fixed intermediate forming piece arranged on the tilling shaft portion side and a movable intermediate forming piece arranged on the handle side, and is movable. intermediate formed piece, forms a telescopic slide along a fixed intermediate forming member, and a use position obtained by separating the handle from the tilling shaft portion movable intermediate formed piece is extended slide, is shortened sliding the movable intermediate formed piece The position of the handle can be freely changed between the storage position where the handle is close to the tillage shaft, and the drive shaft is provided with electric drive means. The electric drive means is a power supply having a main switch as a power source. Connected through a circuit, The in switch includes a detection piece disposed in the fixed intermediate formation piece through a detection piece advance / retreat hole formed in the fixed intermediate formation piece, and moves the movable intermediate formation piece to the storage position by moving the movable intermediate formation piece. The detection piece is pressed to forcibly turn off the main switch .

In this manner, the movable intermediate formed piece, forms a telescopic slide along a fixed intermediate forming member, and a use position in which to separate the handle the movable intermediate formed piece is extended slide from tilling shaft portion, the movable intermediate Since the position of the forming piece can be changed between the storage position in which the forming piece is shortened and slid and the handle is close to the tilling shaft, the movable intermediate forming piece must be placed at the use position when performing the tilling work. Thus, the handle can be disposed at a position separated from the tilling shaft portion, and the safety of the operator who holds the handle and performs the tilling operation can be ensured satisfactorily.

  Further, when the tilling work is not performed, the movable intermediate forming piece is disposed at the storage position, so that the handle can be disposed at a position close to the tilling shaft portion, and the intermediate body of the support portion is made compact. be able to.

  Therefore, the tilling device can be configured to be lightweight and compact, and the storage space for the tilling device can be saved.

Furthermore, the posture of the intermediate main body of the support portion can be easily changed to the use state or the storage state.

The main switch includes a detection piece disposed in the fixed intermediate formation piece through a detection piece advancement / retraction hole formed in the fixed intermediate formation piece, and moves the movable intermediate formation piece to the storage position, thereby moving the intermediate formation. Since the main switch is forced to be in the OFF state by pressing the detection piece with one piece , the movable intermediate forming piece is repositioned to the storage position when the intermediate body of the support portion is brought into a compact storage state. Since the main switch can be turned off in conjunction with the inevitable action, forgetting to turn off the main switch can be surely prevented, and malfunction of the tillage shaft portion can be prevented. As a result, safety can be improved.

  Moreover, since the main switch can be reliably turned off, it is possible to reliably prevent the occurrence of electric leakage in the state where the tilling device is stored. As a result, the power supply circuit can be protected.

  A shown in FIGS. 1 to 3 is a tilling device according to the present invention. The tilling device A includes a support portion 1, a tilling shaft portion 2 rotatably supported by the support portion 1, and the tilling device. A rotation drive unit 3 (see FIG. 7) is provided as an electric drive means built in the shaft unit 2 to drive the tillage shaft unit 2 to rotate. M is an operator.

  Below, the structure of the support part 1, the tilling shaft part 2, and the rotation drive part 3 is demonstrated concretely.

[Description of Support Unit 1]
As shown in FIGS. 1 to 3, 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.

  The support base 9 supports a battery case 13 containing a battery (not shown) and the intermediate body 10.

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

  As shown in FIGS. 4 and 5, the adjusting body 16 is formed with an intermediate portion 17 a of the sandwiching piece 17 in an arc shape along the outer peripheral surface of the upper portion of the fixed intermediate forming piece 14. The left and right end portions 17b and 17b are arranged opposite to each other so as to extend rearward in parallel with the left and right sides. A female screw piece 19 is screwed to the tip of the clamping bolt 18 penetrating further outward, 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 fixed intermediate forming piece 14 at intervals in the circumferential direction. The upper part of the intermediate forming 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 side end portions 17b, 17b are adjusted to approach / separate via the clamping bolt 18 and fixed. The upper and lower portions of the intermediate forming piece 14 can be adjusted.

  Therefore, when adjusting the expansion and contraction of the movable intermediate forming piece 15 inserted into the fixed intermediate forming piece 14, the diameter of the fixed intermediate forming piece 14 is adjusted by expanding the rotating operation piece 20 as described above. The movable intermediate formed piece 15 can be fixed by sliding the movable intermediate formed piece 15 up and down as appropriate, and then adjusting the diameter of the fixed intermediate formed piece 14 by operating the rotating operation piece 20.

  In the present embodiment, the movable intermediate forming piece 15 is extended upward, that is, the use position (a) where the movable intermediate forming piece 15 is separated from the tilling shaft portion 2 by the gripping body 6 as a handle, and the gripping body 6 The position can be freely changed between the storage position (b) close to the tillage shaft 2.

  Here, the use position (a) is an arbitrary position between a position where the movable intermediate forming piece 15 is pulled up to the maximum and a position where the movable intermediate forming piece 15 is lowered slightly below the same position. Refers to a position where the gripper 6 can be easily gripped during work according to its body shape.

  The storage position (b) is a position between the position where the movable intermediate forming piece 15 is pushed down to the maximum and the position where the movable intermediate forming piece 15 is pulled up slightly above the same position. It is a dangerous position to hold and work.

  In this way, between the use position (a) where the gripping body 6 separates the movable intermediate forming piece 15 from the tilling shaft portion 2 and the storage position (b) where the gripping body 6 is close to the tilling shaft portion 2. Since the position can be freely changed, when the tilling work is performed, the movable intermediate forming piece 15 is arranged at the desired use position (a) of the worker M, so that the gripping body 6 is separated from the tilling shaft portion 2. Thus, it is possible to perform the tilling work easily while ensuring the safety of the worker M who grips the gripping body 6 and performs the tilling operation well.

  In addition, when no plowing work is performed, the gripping body 6 can be arranged at a position close to the plowing shaft portion 2 by arranging the movable intermediate forming piece 15 in the storage position (b), and the support portion. One intermediate body 10 can be made compact.

  Therefore, the tilling device A can be configured to be lightweight and compact, and the storage space for the tilling device A can be saved.

  Moreover, in the present embodiment, a power circuit 75 made of an electric cord is interposed between the battery described above and an electric motor 60 of the rotation drive unit 3 described later, and a main part of the power circuit 75 has a main part. The switch 32 and the hand switch 35 described above are provided in series.

  1, 2 and 6, the main switch 32 is attached to the lower part of the rear peripheral surface of the fixed intermediate forming piece 14, and the main switch 32 is provided with a detection piece 32a. The detection piece 32a is arranged in the fixed intermediate formation piece 14 through the detection piece advance / retreat hole 14a formed in the fixed intermediate formation piece 14, so that the main switch 32 is held in the ON state (power supply circuit connection state). As the main switch 32, a limit switch or the like can be used.

  In this way, when the movable intermediate forming piece 15 that expands and contracts in the fixed intermediate forming piece 14 is in the use position (a), the movable intermediate forming piece 15 may interfere with the detection piece 32a of the main switch 32. Rather, the main switch 32 is held in the ON state (power supply circuit connection state).

  When the movable intermediate forming piece 15 is in the storage position (b), the outer peripheral surface of the movable intermediate forming piece 15 presses the detection piece 32a of the main switch 32, and the detection piece 32a is moved through the detection piece advance / retreat hole 14a. The main switch 32 is forcibly turned off (power supply circuit cut off state) by moving backward.

  Therefore, when the intermediate body 10 of the support portion 1 is in the compact storage state, the main switch 32 is turned off in conjunction with the inevitable action of changing the movable intermediate forming piece 15 to the storage position (b). Therefore, forgetting to turn off the main switch 32 can be surely prevented, and malfunction of the tillage shaft portion 2 can be prevented. As a result, safety can be improved.

  Further, during use (at the time of tillage work), the main switch 32 can be turned on in conjunction with the inevitable action of changing the position of the movable intermediate forming piece 15 to the use position (a). The trouble of turning on the main switch 32 can be saved.

  Moreover, since the main switch 32 can be reliably turned off, it is possible to reliably prevent the occurrence of electric leakage in the state where the tilling device A is stored. As a result, the power supply circuit 75 can be protected.

  Further, in the middle part of the fixed intermediate forming 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 fixed intermediate forming piece 14 can be fitted is formed by extending in the vertical direction, and the rear left side portion centering on the concave portion 27 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 fixed intermediate forming 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 fixed intermediate forming piece 14, when the hand is released 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 fixed intermediate forming 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.

  The gripping body 6 is connected to the upper end of the movable intermediate forming piece 15, and a hand switch 35 is arranged along the lower side of the gripping body 6. When it is held together, it can be turned on and the rotation drive unit 3 described later can be started. On the other hand, when the hand holding the grasping body 6 is loosened, it is turned off and the rotation drive unit 3 is turned on. It can be stopped.

  Then, the start / stop operation of the rotation drive unit 3 by the hand switch 35 can be performed only when the main switch 32 is in the ON state. When the main switch 32 is in the OFF state, the rotation drive unit 3 can be rotated even if the hand switch 35 is operated. Part 3 is prevented from starting.

  Further, a display lamp 79 that indicates that the main switch 32 is in an ON state is attached to a position in the vicinity of the gripping body 6 that is the upper end portion of the movable intermediate forming piece 15.

  In this way, whether or not the main switch 32 is in the ON state can be easily and surely confirmed simply by visually recognizing the display lamp 79 disposed in the vicinity of the hand holding the gripping body 6 by the worker M. Thus, it is possible to prevent erroneous operation and to ensure good safety.

[Description of tillage shaft 2]
As shown in FIGS. 1 to 3 and 7, 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 L2 of the pivot shaft is disposed in the vicinity of the axis L1 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 through the tilling claw mounting pieces 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 to cover the outer side of the end wall body 43, and the ring-shaped end wall body covering piece 49, 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 is configured to block the space 51 between the end wall body covering piece 49 and the end wall body 43.

  Thus, even if mud or the like enters from the gap between the inner peripheral surface of the rotating 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. This prevents the rotation drive unit 3 from being damaged, etc. by preventing mud etc. from entering the rotation drive unit 3 to be described later. Yes.

[Description of Rotation Driving Unit 3]
As shown in FIG. 7, the rotation drive unit 3 includes an electric motor 60 and a speed reduction mechanism 61. The electric motor 60 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 interlocked and connected 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.

  In addition, the electric cord forming the power supply circuit 75 connecting the electric motor 60 to the battery is formed in the hollow pipe-like support body 4 and on the right side as shown in FIGS. Wiring is performed through a cord insertion hole 76 formed at the center of the support shaft 40.

[Tilling device A as another embodiment]
FIG. 8 shows a cultivating device A as another embodiment. The cultivating device A has the same basic structure as the cultivating device A described above, but the movable intermediate forming piece 15 is a fixed intermediate forming device. The lower end is pivotally connected to the upper end of the piece 14 via a pivot / connector 80, and the use position (c) arranged on the same axis as the axis of the fixed intermediate forming piece 14 and the fixed intermediate forming The difference is that the position can be freely changed by rotating between the storage position (d) folded on the side of the piece 14.

  That is, as shown in FIG. 9, the pivot / connector 80 includes a fixed-side connecting piece 81 attached to the upper end portion of the fixed intermediate forming piece 14 and a movable-side connection attached to the lower end portion of the movable intermediate forming piece 15. The piece 82 is pivoted and connected by a pivot pin 83 whose axis is directed in the left-right direction, and is rotatable between the use position (c) and the storage position (d) around the pivot pin 83. There is no.

  The main switch 32 that is normally in an OFF state (power supply circuit cut off state) is attached to the side surface of the fixed side connecting piece 81, while the action piece 84 is connected to the movable side connecting piece 82 via the pivot pin 83. It is attached so that it can rotate integrally with 82.

  Thus, when the movable side connecting piece 82 is arranged at the use position (c), the action piece 84 presses against the detection piece 32a of the main switch 32 to forcibly turn on the main switch 32. (Power supply circuit connection state).

  Further, when the movable side connecting piece 82 is rotated so as to be arranged at the storage position (d) and the pressing action by the action piece 84 is released from the detection piece 32a of the main switch 32, the main switch 32 is turned off (power supply). Circuit return state).

  Accordingly, also in this case, when the intermediate body 10 of the support portion 1 is in a compact storage state, the main switch 32 is linked with the inevitable action of changing the position of the movable intermediate forming piece 15 to the storage position (d). Therefore, it is possible to reliably prevent the main switch 32 from being forgotten to be turned off, and to prevent malfunction of the tillage shaft portion 2. As a result, safety can be improved.

  Further, during use (at the time of tillage work), the main switch 32 can be turned on in conjunction with the inevitable action of changing the position of the movable intermediate forming piece 15 to the use position (c). The trouble of turning on the main switch 32 can be saved.

  Moreover, since the main switch 32 can be reliably turned off, it is possible to reliably prevent the occurrence of electric leakage in the state where the tilling device A is stored. As a result, the power supply circuit 75 can be protected.

  Further, in the present embodiment, when the movable intermediate forming piece 15 is disposed at the storage position (d), the end of the gripping body 6 is positioned between the vertically extending pieces 7 and 7 of the support body 4. The resistance rod 12 is also attached in a state inverted 180 degrees from the use state so that the lower end portion of the resistance rod 12 can be positioned in the vicinity of the tilling shaft 41.

  Therefore, the height and front-rear width of the tillage device A can be made compact.

Side surface explanatory drawing in the use condition of the tillage apparatus which concerns on this invention. Side view of the tillage device. The front view of the tillage device. The cross-sectional top view of a support part. The back explanatory drawing of the support part. Explanatory sectional side view of the main switch. The cross-sectional front view of a tilling shaft part. Side surface explanatory drawing of the cultivation apparatus as other embodiment. The enlarged side view of a main switch.

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 (1)

A support portion and a tilling shaft portion that is rotatably supported by the support portion, and the support portion is formed by extending the intermediate body in the vertical direction, and a gripping body is formed on the upper end portion of the intermediate body. A tilling device provided as a handle,
The intermediate body includes a fixed intermediate forming piece arranged on the tilling shaft portion side and a movable intermediate forming piece arranged on the handle side, and the movable intermediate forming piece is extendable and slidable along the fixed intermediate forming piece. And
A use position to separate the handle is extended sliding the movable intermediate formed piece from tilling shaft portion, freely position change between a stored position was close to the tilling shaft portion the handle the movable intermediate formed piece is shortened Slide None,
The tillage shaft is provided with electric drive means,
The electric drive means is connected to a power supply via a power supply circuit having a main switch,
The main switch includes a detection piece disposed in the fixed intermediate formation piece through a detection piece advance / retreat hole formed in the fixed intermediate formation piece, and moves the movable intermediate formation piece to the storage position, thereby moving the movable intermediate formation piece. A tilling device characterized in that the main switch is forcibly turned off by pressing the detection piece .

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