JP4929662B2 - Seedling planting machine - Google Patents

Description

  The present invention relates to a seedling planting device for a seedling planting machine, in which a planting arm having a planting needle and a planting claw is arranged in a seedling planting case formed in a tridental form, and each of these planting arms A three-pronged plant that moves the tip part up and down by drawing a fixed planting locus line, separates and holds the seedling supplied from the seedling tank with the planting needle part, and pushes this seedling onto the soil surface with the planting claw part It is set as the structure of a cylindrical rotary form.

A rotary drum-shaped rotary case is used as a seedling planting case, and inside this seedling planting case, a planting arm having a planting needle and a planting claw is arranged at approximately 120 degree intervals of a rotation trisection angle. , A technology that allows the tip of the planting arm to protrude to the outer periphery of the seedling planting rotation while rotating the seedling planting case, and draws a substantially elliptical planting locus line to separate and plant the seedling ( For example, see Patent Document 1).
Japanese Unexamined Patent Publication No. 2005-87027 (page 3, FIG. 3).

  In a rotary-type seedling planting device that places a plurality of planting arms with planting needles and planting claws and rotates while seedling planting, the conventional type in which this seedling planting arm is arranged at a bisecting angle The form added to the three-divided angle arrangement has a better balance in rotational inertia than the form, and the variation in planting addition can be reduced. However, the weight of the planting device increases, the outer periphery of the planting case always approaches the soil surface, and the contact area with the soil surface and planted seedlings increases, resulting in frictional resistance and seedling disturbance. It is likely to occur.

According to the first aspect of the present invention , a seedling planting device (9) is provided in a seedling planting frame (15) equipped with a transmission mechanism, and the seedling planting device (9) is a central axis of rotation of the seedling planting case (1). (2) The planting arms (5) having the planting claws (4) are pivotally mounted around the arm shaft (6) at approximately three-divided angle positions around the arm shaft (6). each arm shaft of the case (1) (6) bearing case of the outer periphery (7), both the projecting trigeminal shape, each of these bearing case section (7) case spacing part between the (8) recessed, seedlings The planting case (1) is provided with a rattling cam (45), and the seedling planting frame (15) is pivotally supported by a rattling arm (47) opposite to the rattling cam (45). The arm (47) is repelled by the spring (49) toward the rattling cam (45), and the rattling arm (47) is rattling cam when the planting arm (5) separates the seedlings. 45) presses the the seedling planting machine is characterized in that a configuration of suppressing the rattling of the seedling planting apparatus (9). By rotating the seedling planting case (1) around the case axis (2), the planting arm (5) is rotated around the arm axis (6) of the outer peripheral portion of the seedling planting case (1), This tip is moved up and down while drawing a planting locus line. In the descending process of the planting trajectory line, each planting arm (5) separates and holds an appropriate number of seedlings supplied from the seedling tank and descends. Plant. Since such seedling separation and planting are performed for each planting arm (5), planting of three seedlings is performed each time the seedling planting case (1) rotates once. Since each bearing case part (7) of this seedling planting case (1) protrudes to the outer periphery at the attachment part of each planting arm (5), it is on the soil surface almost simultaneously with this planting arm (5) part. Although it is in the state which approaches and is easy to contact, the case space | interval part (8) between the planting case parts (7) of each front and back maintains a separated state from the soil surface.

The invention according to claim 2, each planting arm (5) having planting claws (4) at a substantially trisecting angle position around the rotation center axis (2) of the seedling planting case (1), The arm shaft (6) is rotatably mounted around the arm shaft (6), and the two planting arms (51) and (52) of each planting arm (5) are moved downward along the planting locus line (D). The seedling transplanter according to claim 1, wherein the seedling transplanter is positioned at (D1) and phase-set so that one planting arm (53) is positioned and operated in the ascending stroke (D2). Is. When the seedling planting case (1) is rotated around the case axis (2), the planting arm (5) is bent and stretched around the arm axis (6) at the outer peripheral portion of the seedling planting case (1). This tip is moved up and down while drawing a planting locus line (D). In the descending process (D1) of the planting trajectory line (D), each planting arm (5) descends by separating and holding an appropriate number of seedlings supplied from the seedling tank, and is lowered on the lower soil surface portion. The seedlings are planted on the soil surface by movement. Since such seedling separation and planting is performed for each planting arm (5), seedling planting of three seedlings is performed each time the seedling planting case (1) rotates once. Each of the planting arms (5) arranged at the three positions of the rotation outer periphery of the seedling planting case (1) has a lowering process (D1) at the upper and lower ends of the planting locus line (D). The planting arm (51) that performs seedling separating action and the planting arm (52) that performs seedling planting action are located. There is an inner planting arm (53), and the rotational inertia force during the operation cycle of each planting arm (5) is large in the descending stroke (D1) and in the ascending stroke (D2) at a two-to-one ratio. The same applies to the load that is small and the planting arm (5) receives. For this reason, the change of the rotational drive force as these seedling planting apparatuses as a whole is maintained in a relatively small state.

According to the first aspect of the present invention, the seedling planting case (1) is disposed so as to protrude only in three directions of the rotating outer peripheral portion as a bearing case portion (7) for axially mounting the planting arms (5). Therefore, contact with the soil surface, planted seedlings, and the like and seedling disturbance can be reduced in the seedling rotation driving, and the formation of the case interval portion (8) and the rattling arm (47) ) And the spring (49), the seedling planting case (1) can be reduced in size and weight by the configuration that suppresses rattling of the seedling planting device (9) during the seedling separating operation . And generation | occurrence | production of the noise etc. at the time of suppressing the shakiness of the seedling planting apparatus (9) can be decreased.

In the invention according to claim 2, in addition to the effect of the invention according to claim 1, of the three planting arms (5), two planting arms (51) and (52) are lowered. In the process (D1), one planting arm (53) is in the ascending process (D2), and these two planting arms (51), (52) In order to receive resistance such as planting, the operating inertia and the resistance force cancel each other, maintaining the balance of the planting rotational driving force and performing smooth driving. In addition, the planting trajectory line (D) can be tilted forward and the action of the planting claws (4) on the soil surface can be lengthened to stabilize planting.

  Based on the drawings, in the seedling transplanter, the seedling planting device 10 is connected to the rear side of the vehicle body 11 in the riding four-wheel drive mode via a lift link 13 in the form of a parallel link that is lifted and lowered by hydraulic expansion and contraction of the lift cylinder 12. Is done. This seedling planting device 10 includes a center float 16 that slides on the soil surface and side floats 17 on both the left and right sides under the seedling planting frame 15 that has a transmission mechanism that is input from the PTO shaft 14 on the vehicle body 11 side. Arranged on the upper side is a seedling tank 18 that accommodates mat seedlings grown in a mat shape and can be fed back and forth across the width of the seedling while feeding back and forth, and a seedling outlet 19 of each seedling tank 18. The seedling planting device 9 or the like for planting the seedlings that are separated and held by raising and lowering the planting arm 5 while operating on the soil surface leveled by the floats 16 and 17 is provided as a multi-row planting configuration. Yes. The seedling outlet 19 is formed in a guide frame 28 that guides the movement of the seedling tank 18. The guide frame 18 is fixed at a fixed position with respect to the seedling frame 15.

  The vehicle body 11 has an engine 21 mounted on the lower side of the driver's seat 20 and transmits a front wheel 24 steered by a steering handle 23 on a front dashboard 22 and a rear wheel 25 disposed at a rear end portion. The tractor is configured to drive and travel. On the vehicle body 11, a driving floor 26 is provided from the left and right sides of the dashboard 22 to the left and right sides of the driver's seat 20. A replenishing seedling mounting frame 27 is provided on the front portion of the dashboard 22. The mat seedling can be taken out from the seedling box while taking out the seedling box and supplied to the rear seedling tank 18. A fertilizer device 30 is provided at the rear portion of the vehicle body 11, and fertilizer can be applied to the flat portions of the floats 16 and 17 through a fertilizer pipe 29.

  Here, the configuration of the seedling planting device 9 configured at the rear end portion of the seedling planting frame 15 is set at a substantially trisecting angle (every 120 degrees) around the case axis 2 at the center of rotation of the seedling planting case 1. The planting arms 5 having the planting needles 3 and the planting claws 4 are mounted so as to be able to bend and rotate around the arm shafts 6, and the bearing case portions on the outer periphery of the arm shafts 6 of the seedling planting case 1. 7 is protruded in a trifurcated manner, or is protruded to the outer periphery from the rotation locus around the rotation center axis 2 of the arm shaft 6, and the case interval portion 8 between the bearing case portions 7 is recessed. And By rotating the seedling planting case 1 around the case axis 2, the planting arm 5 is bent and rotated around the arm axis 6 on the outer peripheral portion of the seedling planting case 1, and the end of the planting needle 3 at the tip is moved. It is moved up and down while drawing a planting locus line D. In the descending process D1 of the planting locus line D, each planting arm 5 is actuated so as to extend toward the tip side of the planting case 1, and an appropriate number of seedlings supplied from the seedling tank by the planting needle 3 are provided. The seedling is planted on the soil surface by the downward movement of the planting claws 4 in the lower soil surface portion. Since such seedling separation and planting are performed for each planting arm 5, seedling planting of three seedlings is performed each time the seedling planting case 1 rotates. Since each bearing case part 7 of this seedling planting case 1 protrudes to the outer periphery at each planting arm 5 mounting part, it is in a state where it is easy to approach and contact the soil surface almost simultaneously with this planting arm 5 part. However, the case space | interval part 8 between the planting case parts 7 of each front and back maintains a separated state from the soil surface. In addition, the seedling planting case 1 is configured such that each bearing case portion 7 protrudes from the outer peripheral portion as a configuration of a cylindrical gear case in which each arm shaft 6 portion is drawn by rotation around the case shaft 2. It is also possible. In this embodiment, the case interval portion 8 is formed between the bearing case portions 7 so that it is formed in a relatively shallow recess shape.

  Further, when the planting needle 3 of any planting arm 5 enters the seedling on the seedling tank and separates the seedling, two of the planting arms 5 including the planting arm 5 are included. The planting arms 51 and 52 are positioned in the descending stroke D1 of the planting locus line D, and the phase is set so that one planting arm 53 is positioned and operated in the ascending stroke D2. In the seedling planting operation as described above, the planting arms 5 arranged at the three positions of the rotation outer peripheral portion of the seedling planting case 1 are separated from the upper and lower ends of the descending stroke D1 of the planting locus line D. While the planting arm 51 that performs the action and the planting arm 52 that performs the seedling planting action are located, there is a planting arm 53 that has finished the seedling planting and is in the returning operation in the ascending stroke D2. Thus, the rotational inertia force during the operation cycle of each planting arm 5 is large in the descending stroke D1 and small in the ascending stroke D2 at a ratio of two to one, and the load received by the planting arm 5 is the same. For this reason, the change of the rotational drive force as these seedling planting apparatuses as a whole is maintained in a relatively small state. Further, the planting locus line direction core H connecting the planting locus lines D of the planting arm 5 between the upper and lower dead centers is inclined forwardly. As a result, the height of the planting trajectory line direction center H can be lowered, the drop of the seedling planting descending process by the planting arm 5 can be reduced, and the disturbance of the descending holding seedling during this period can be reduced. . Also, it is possible to maintain a stable seedling planting posture by lengthening the operation stroke in the soil such as the planting needle 3 and the planting claw 4 to sufficiently adhere the seedling to the soil. it can.

  Further, when the two planting arms 51 and 52 are positioned in the descending stroke D1, the planting needle 3 of the planting arm 53 in the ascending stroke D2 is planted by the planting arm 51 in the seedling separation position portion. It is set to be positioned lower than the attached needle 3. Further, when only one planting arm 51 is in the descending stroke D1, the planting needle 3 tip of the planting arm 53 in the ascending stroke D2 is positioned below the rotational pitch circle P of the arm shaft 6. It is set to do.

  The seedling planting case 1 is formed in a substantially trifurcated or Y-shaped form, and the planting arm 5 is bent and stretched around the arm shaft 6 on one side surface of the bearing case unit 7 at each tip. Provided possible. In the seedling planting case 1, an inconstant speed gear is arranged so that the tip of the planting needle 3 at the tip of each planting arm 5 operates while drawing a substantially elliptical planting locus line D in a side view. The system is linked with the mechanism. For this reason, the case shaft 2 that supports the seedling planting case 1 and rotates integrally is provided with a center gear 31 that is fixed integrally with the bearing boss 30 of the seedling planting frame 15, and this center gear 31 serves as a sun gear. Intermediate gear 32 is meshed as a planetary gear. Bearings are arranged by gear shafts 33 on the bearing case part 7 side. A terminal gear 34 meshing with the intermediate gear 32 is integrally provided on the arm shaft 6 at the tip of each bearing case portion 7. Each arm shaft 6 is integrally provided with a planting arm 5 on the outside of the seedling planting case 1. The base portion of the planting arm 5 is in a case shape and has a structure in which an extrusion rod 35 is slidably supported inside and is pushed out via a cam lever 36 and a spring 37. The cam lever 36 is rotatably supported around a lever shaft 38 of the planting arm 5, is provided integrally with the bearing case portion 7, and is slidably contacted with an extrusion cam 39 formed around the arm shaft 6. Yes.

  When the seedling planting case 1 is rotated by the rotation drive of the case shaft 2, the planting arm 5 mounted on each bearing case part 7 is rotated in the same direction, and the intermediate gear 32 meshed with the center gear 31 and the terminal Each arm shaft 6 is rotated via the gear 34 or the like, and each planting arm 5 is pivoted up and down around the arm shaft 6 so that the angle of the planting arm 5 is set to the top dead center. It operates loosely at the seedling separation position, and steeply at the bottom dead center. The push rod 35, which is repelled by the spring 37, is a cam lever 36 that is rotated by the push cam 39 during the downward stroke from the seedling separation position at the top dead center to the position just before planting at the bottom dead center. Therefore, it is in the upward movement position pushed back upward against the spring 37. When the planting position is further reached, the cam lever 36 by the push cam 39 is pushed downward by the elastic force of the spring 37. Each planting arm 5 is attached with a bifurcated parallel planting needle 3 that is inserted into and separated from the seedbed portion of the mat seedling, and a planting claw 4 that moves up and down along the inside of the planting needle 3 is pushed out. It is formed at the lower end of the rod 35. These seedling needles 3 and planting claws 4 separate, hold, and plant seedlings.

Next, based on FIG. 6, the structure of the rattling device for preventing the seedling planting device 9 from rattling will be described. The seedling planting device 9 receives the greatest change in resistance before and after the seedling fed from the seedling tank 18 is stabbed with the planting needle 3 or the like and separated. At this time, rattling is likely to occur in the planting device 9, and thus this rattling is absorbed. A rattling cam 45 is provided in the seedling planting case 1. This cam 45 is springed by a spring 46 in the direction of rotation of the seedling planting case 1. On the other hand, a rattling arm 47 is provided on a part of the seedling planting frame 15 so as to face the rotational position of the rattling cam 45. The ratchet arm 47 is pivotally supported by the seedling planting frame 15 with a pin 48 and is ejected by the spring 49 toward the ratchet cam 45 side. A rubber stopper 50 for buffering is provided on the contact surface of the take-off arm 47 for the return operation by the spring 49. When each of the seedling planting arms 5 separates the seedling, the rattling cam 45 rotates while pressing the rattling arm 47 against the spring 49 so that the large separation resistance during the seedling separating action is obtained. It is possible to reduce rattling of the seedling planting device 9 that can absorb such changes, and the occurrence of noise and the like associated therewith.

  Next, mainly based on FIG. 7, the cross-sectional shape of the planting needle 3 attached to the tip of the planting arm 5 is formed in a crescent shape. By forming the inner peripheral surface of the planting needle 3 into an arc shape along a circular locus around the central axis of the push rod 35, the fork-shaped planting claw 4 provided facing the inside is provided. However, the gap 56 between the planting needle 3 and the planting claw 4 does not change and is kept constant even if it is deviated slightly to the left and right. Reduce seedling rotation and disturbance.

The side view of a seedling planting apparatus part. The side view of the seedling planting part transmission mechanism. The plan view. The side view of the seedling transplanter. The plan view. The side view of the rattling part of the seedling planting apparatus. The plane sectional view which shows another example of the planting needle part.

1 seedling planting case 2 case shaft 3 planting needle 4 planting claw 5 planting arm 51 planting arm 52 planting arm 53 planting arm 6 arm shaft 7 bearing case section 8 case spacing section 9 seedling planting device 10 seedling planting Device D Planting locus line D1 Down stroke D2 Up stroke

Claims (2)

A seedling planting device (9) is provided in a seedling planting frame (15) equipped with a transmission mechanism, and the seedling planting device (9) is divided into approximately three equal parts around the rotation center axis (2) of the seedling planting case (1). In the corner position, each planting arm (5) having planting claws (4) is rotatably mounted around the arm shaft (6), and each arm shaft ( 6) bearing case of the outer periphery (7), both the projecting trigeminal shape, recessed respective bearing case section (7) case spacing part between the (8), play the NaeUe case (1) A take-off cam (45) is provided, and a rattle-taking arm (47) is pivotally supported on the seedling-planting frame (15) with a ratchet arm (47) facing the rattle-take cam (45). (45) The spring (49) is repelled and the seedling planting arm (47) presses the rattle cam (45) during seedling separation by the planting arm (5) to plant seedlings. Seedling planting machine is characterized in that a configuration of suppressing the rattling of the location (9). Each planting arm (5) having a planting claw (4) is rotated about the arm axis (6) at a substantially trisecting angle around the rotation center axis (2) of the seedling planting case (1). Of these planting arms (5), the two planting arms (51) and (52) are positioned on the descending stroke (D1) of the planting locus line (D). The seedling planting machine according to claim 1 , characterized in that the phase of the planting arm (53) is set so that the planting arm (53) is positioned and operated in the ascending stroke (D2).

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