JP5772898B2 - Seedling transplanter - Google Patents

Description

The present invention relates to a seedling transplanter .

  As shown in Patent Document 1, in a seedling transplanter, there is a planting device in which a planting tool at a rear end portion thereof is provided so as to be movable up and down by a lifting arm. This seedling transplanter can raise and lower a planting tool while maintaining the posture of the planting tool by a lifting arm having a front end connected to the machine body and a parallel link that operates in parallel, and can perform seedling transplanting work.

JP 2005-237347 A

  However, the planting device of the seedling transplanter configured as described above tends to operate quickly due to the inertial force due to its own weight when the planting tool moves down, and conversely, when the planting tool moves up. There is a so-called problem that the operation tends to be delayed due to its own weight, and the planting operation of the planting tool is difficult to perform smoothly. Moreover, when stopping a planting tool in a raise position, the brake device only for a planting tool stop is needed.

The problem to be solved by the present invention is to provide a seedling transplanting machine that can perform a planting operation of a planting tool smoothly and can perform a stable and appropriate seedling transplanting operation. Moreover, the adaptability with respect to the kind of seedling to plant and between planting stocks expands, and it is in providing a versatile seedling transplanter.

The invention according to claim 1 is directed to a seedling transplanting machine in which a planting device (11) is moved up and down by a lifting mechanism (U) driven by a drive unit (44) and moved up and down to plant seedlings in a field. A first transmission that selectively switches a gear pair that is transmitted from a gear pair, a second transmission that selectively switches a gear pair that is transmitted from a plurality of gear pairs, and a plurality of gear pairs; And a third transmission that selectively changes gear pairs to be transmitted from the first transmission to the third transmission via the second transmission, and the third transmission. The elevating mechanism (U) is operated by transmission from the front end portion (12a), and both the driven gear of the gear pair of the second transmission device and the driving side gear of the gear pair of the third transmission device are used together . Lifting arm (12) swinging up and down around the center, and lifting arm (12) A sub-link (13) swinging up and down around the front end (13a) parallel to the lower side, and the front end (12a) of the elevating arm (12) and the front end (13a) of the sub-link (13) are connected. The connecting link (R), the swinging arm (14) connected to the connecting link (R) and moving the connecting link (R) back and forth, and the connecting point (12b) at the intermediate portion of the lifting arm (12) Connected to the connecting point (19b) of the intermediate part of the sub link (13) and the crank arm (15) connected to swing the elevating arm (12) up and down, the sub link (13) is swung up and down. The raising / lowering mechanism (U) was provided with the sub crank arm (19), and it was set as the seedling transplanter characterized by the above-mentioned.

According to invention of Claim 1, the adaptability with respect to the kind of seedling to plant and between planting stocks expands, and versatility is acquired. Furthermore , the posture of the elevating link 12 and the sub link 13 is prevented from being broken by the play of the rotating portion of the link by the connecting link R, and the posture of the elevating link 12 and the sub link 13 is appropriately maintained to be planted. Can be operated with a predetermined trajectory to perform transplanting of appropriate seedlings.

It is a side view of the vegetable seedling transplanting machine which shows the structural example of invention application. It is a principal part enlarged side view of a planting apparatus. It is a link lineblock diagram of a planting apparatus. It is a principal part expanded view of a mission case. It is a principal part expanded view of a mission case. It is a transmission system expansion | deployment figure of a planting transmission part. It is a side view for explaining the operation of the cam mechanism. It is the top view and rear view of a scrape part. It is a front view of a planting tool. It is AA sectional drawing of FIG. It is a side view of the vegetable seedling transplanting machine which shows the other structural example.

An embodiment of the present invention that is specifically configured will be described with reference to the drawings.
FIG. 1 is a side view of a vegetable seedling transplanter showing an example of the configuration of the invention.
The transplanter 1 has an engine 2 and a transmission case 3 at the front, front left and right front wheels 4 and 4 as traveling wheels, rear left and right driving rear wheels 5 and 5, and a handle extending from the case rear of the transmission case 3. The frame 3a is configured to include a planting unit by the planting device 6 and the seedling supply device 7, the soil covering pressure reducing wheels 8, 8, the steering handle 9, and the like.

  More specifically, the transmission case 3 is provided with arm-like left and right transmission cases 5a and 5a on both sides thereof in order to adjust the body height and the left and right height, and the left and right transmission cases 5a and 5a. And the left and right drive rear wheels 5 and 5, and a planting unit composed of a planting device 6 provided with a planting tool 11, which will be described later, capable of moving up and down, and a rotating table type seedling supply device 7. Drive in sync with.

  The seedling supply device 7 of the planting part is arranged in a circular table form in which seedling receiving cups 7c... Are arranged at an equal pitch as a receiver that can receive the input seedling stock, and rotate around the transmission system via the transmission shaft 7a. It comprises, and the circular track | orbit which passes along the raising end position of the planting tool 11 is comprised so that rotation operation | movement is possible. Each seedling receiving cup 7c ... conveys and drops the seedling into the planting device 6 at a timing corresponding to the planting tool 11.

  As shown in FIG. 2, an enlarged side view of the main part of the planting device 6 is a bowl-shaped planting tool 11 that can receive a seedling from an opening 11 a formed in the upper part and can be opened and closed left and right, and the planting tool 11. The raising / lowering arm 12 that connects the front end side to the planting transmission part 3c that drives the raising / lowering, and the holder 11b of the planting tool 11 are held while moving up and down in parallel with the lower side of the raising / lowering arm 12 to maintain the posture. It consists of the sub-link 13. Further, the elevating arm 12 and the front end portions 12a and 13a of the sub link 13 are connected by a connecting link R, and can be moved back and forth via a swing arm 14 pivotally supported on a support shaft so as to swing back and forth. And a crank arm 15 that rotationally drives a connecting point 12b at an intermediate portion of the lifting arm 12 is provided.

  The connecting portion 13c between the sub-link 13 and the planting tool 11 is arranged at the rear part of the holder 11b for compactness, and the opening / closing lever 16 for opening / closing the planting tool 11 is provided as a fulcrum with the lifting arm 12. 12c is supported. The open / close lever 16 is provided with an open / close arm 18 that can be operated in parallel via a connecting rod 17, and is pivotally supported at the connecting point 12 b of the crank arm 15. The open / close lever 16 rotates in synchronization with the rotation of the crank arm 15. A sub crank arm 19 that supports the middle portion of the sub link 13 at a connecting point 19b is provided, and an open / close cam 20 is provided integrally with the sub crank arm 19, and the open / close arm 18 is moved to a predetermined timing (planting tool) via a roller 18a. 11 will enter the soil of the cocoon and plant the seedling, and the planting tool 11 will open to the left and right to plant the seedling in the cocoon.

  The elevating arm 12 and the sub link 13 are parallel links that move up and down by being driven by the crank arm 15 and the sub crank arm 19 in the middle, and the rear end side of each is connected to the planting tool 11, Although the planting tool 11 is configured to move up and down along a predetermined trajectory, the front end sides of the planting tool 11 are connected by a connecting link R, so that the lifting arm 12 and the sub-link 13 are moved by the play of the rotating part. The posture of the parallel link is prevented from collapsing, and the lifting arm 12 and the sub-link 13 operate while maintaining the posture of the parallel link appropriately, and the planting tool 11 is moved up and down along a predetermined trajectory to transplant an appropriate seedling. Work can be done. If the connection link R is provided with a long hole for operation restriction that fits into the guide pin fixed on the planting transmission portion 3c side, and the connection link R is configured to perform an appropriate predetermined operation, the lifting arm is further provided. 12 and the sub-link 13 operate while maintaining the posture of the parallel link appropriately, and the transplanting tool 11 can be moved up and down along a predetermined locus to perform an appropriate seedling transplanting operation.

  In the planting device 6 having the above-described configuration, the planting tool 11 opens and closes to the left and right in conjunction with the lifting and lowering operation by the lifting arm 12 and the sub link 13 that are swung up and down by the rotation of the crank arm 15 and the sub crank arm 19. Plant seedlings. Specifically, as shown in FIG. 3, which is a link configuration diagram, when the crank arm 15 and the sub crank arm 19 rotate, the front ends 12 a and 13 a of the elevating arm 12 and the sub crank arm 19 are moved forward and backward by the swing arm 14. While moving, it is swung up and down, and the lower end of the planting tool 11 at the rear end position operates by drawing a vertically long oval locus A. The lifting arm 12, the sub link 13, the connecting link R, the crank arm 15, the sub crank arm 19, and the swing arm 14 constitute a lifting mechanism U for the planting tool 11.

  Regarding the opening / closing operation of the planting tool 11, the opening / closing lever 16 pivotally supported on the support shaft 12 c of the elevating arm 12 operates in parallel with the opening / closing arm 18 via the connecting rod 17. The operation is controlled by an open / close cam 20 integrated with a sub crank arm 19 that rotates in the same phase. Therefore, it is possible to control the opening / closing timing and the opening / closing amount with high accuracy by a simple cam.

  Next, the transmission mechanism will be described. As shown in FIG. 4, the transmission case 3 integrated with the engine has an input shaft 32 that receives engine power from the input gear 31 via the main clutch 32K. A countershaft 33 that rotates integrally with a driven gear 33a that meshes with a drive gear 32b that rotates integrally with the input shaft 32, a speed change shaft 35 that includes a shift gear 34, and left and right drive wheels that drive the driving rear wheels 5 and 5 for airframe travel. The drive shafts 36, 36 are provided, and the speed change shaft 35 is moved by selecting the high speed gear 32a of the input shaft 32 according to the shift position of the shift gear 34, planting speed by selecting the low speed gear 32b, and the reverse gear of the counter shaft 33. The speed is changed to the reverse speed by selecting 33R.

  When the planting speed is selected by selecting the low speed gear 32b, a large drive gear 33b, a medium drive gear 33c, and a small drive gear that rotate together with the counter shaft 33 by a shift key 33K operated by a planting shift lever 33S. On the other hand, the input shaft 32 is provided with a small driven gear 32c, a medium driven gear 32d, and a large driven gear 33e that rotate together with the low-speed gear 32b that is freely rotatable. The drive gear 33b, medium drive gear 33c, small drive gear 33d and small driven gear 32c, medium driven gear 32d, and large driven gear 33e are always meshed. Accordingly, the planting speed can be changed in three stages by the planting shift lever 33S.

  In addition, while the planting shaft 37 is driven at a constant speed by the counter shaft 33 via the bevel gear mechanism 37a, the planting speed is changed in three stages by the planting shift lever 33S to change the inter-plant distance. Can be planted at different speeds.

  The planting transmission part 3c arrange | positions the transmission shaft 44 of the planting apparatus 6, and the transmission shaft 45 of the seedling supply apparatus 7, as the principal part enlarged side view and its transmission system development | deployment figure are shown in FIG. That is, the transmission shaft 45 of the seedling supply device 7 is driven to change speed from the input shaft 41a that receives the power from the mission case 3 via the planting shaft 37, via the inter-plant transmission 41, and via the planting clutch 45a. This speed change power is input to the control side of the intermittent clutch 44a. Therefore, the power shifted by the inter-strain transmission 41 is intermittently transmitted to the transmission shaft 44 of the planting device 6 in accordance with the table drive of the seedling supply device 7, and drives the crank arm 15 and the sub crank arm 19.

  In the inter-company transmission 41, a driving-side small gear 41a, an intermediate gear 41b, and a large gear 41c and a driven-side small gear 41d, an intermediate gear 41e, and a large gear 41f are meshed with each other via a counter gear, and Any one of the first inter-stock shift lever 43a and the driven side small gear 41d, the middle gear 41e, and the large gear 41f that rotate the driving side small gear 41a, the middle gear 41b, and the large gear 41c together with the driving side shaft 42a. An inter-stock shift second lever 43b is provided for integrally rotating the knuckle with the drive side shaft 42a. Therefore, the combination of the selection of the three gears on the driving side and the selection of the three gears on the driven side allows the gears to shift to 9 stages.

  Therefore, between the 9-speed shift of this inter-strain transmission 41 and the 3-speed planting speed that is the speed change of the aircraft, the inter-strain can be changed to 27 speeds. The adaptability to the planting stock peculiar to the area is expanded, and a versatile seedling transplanter can be obtained.

  The transmission shaft 44 of the planting device 6 is provided with a cam mechanism 46 that changes the transmission torque. That is, it is constituted by a cam 46a fixed to the transmission shaft 44, a pressing roller 47b pressed against the cam 46a by a tension spring 47a, and a roller support swinging arm 47c for swingably supporting the pressing roller 47b. . Further, the cam 46a brakes the transmission shaft 44 immediately before the stop position T1 at the ascending position of the planting tool 11, and then the lowering inertia due to the weight of the planting tool 11 when the planting tool 11 descends. In order to suppress the force, the brake is continuously applied while gradually increasing the braking force, and the brake against the transmission shaft 44 is stopped immediately before the lowest descending position T2 of the planting tool 11, and then the planting tool 11 is lifted. In the process, the shape assists rotation. Accordingly, the transmission torque of the transmission shaft 44 that moves the planting tool 11 up and down along the locus A is changed in accordance with the vertical movement of the planting tool 11 (due to the weight of the planting tool 11 when the planting tool 11 descends). In order to suppress the downward inertia force, a braking force is applied, and rotation is assisted in the process in which the planting tool 11 is lifted), and the planting tool 11 operates smoothly while maintaining a predetermined appropriate operating speed. Can transplant seedlings. Further, since the cam mechanism 46 brakes the transmission shaft 44 immediately before the stop position T1 at the ascending position of the planting tool 11, the planting tool 11 is properly stopped at the intermittent drive stop position by the planting clutch 45a. And it is not necessary to provide the brake device which stops the planting tool 11 separately, and it can comprise at low cost by a simple structure.

  Reference numeral 50 denotes a scraping device that scrapes off the mud adhering to the inside of the planting tool 11, and includes a swing support arm 51 pivotally supported by the planting transmission portion 3c and a lower end portion of the swing support arm 51. The scraper 53 is detachably fixed by a bolt 52 and an operation driven cam roller 54 provided at the upper end of the swing support arm 51. On the other hand, an operation drive cam 55 is provided on the drive shaft 15a of the crank arm 15, the operation driven cam roller 54 is operated by the rotation of the operation drive cam 55, and the swing support arm 51 swings at a predetermined timing. That is, in the process in which the left and right planting pieces 11L, 11R that open in the left-right direction of the planting tool 11 are opened to the left and right and the seedlings held inside are planted in the field and are lifted open, the scrape portion 53 is planted. It operates so as to fit inside the left and right planting pieces 11L, 11R of the tool 11 and scrape off the mud inside.

  As shown in FIG. 8, the scraper 53 is equipped with a scraper 53a made of a flat rubber material. The scraper 53a has a triangular shape having a receding angle M in a plan view and a shape having a downward inclination angle N in a rear view. By configuring the scraper 53a in such a shape, the scrape portion 53 can be easily fitted into the left and right planting pieces 11L and 11R of the planting tool 11, and mud soil adhering to the inside of the left and right planting pieces 11L and 11R can be obtained. The scraping performance is good, the right and left planting pieces 11L, 11R of the planting tool 11 are appropriately cleaned, the seedling planting performance of the planting tool 11 can be properly maintained, and a good seedling transplanting operation can be performed.

  On the other hand, the left and right planting pieces 11L and 11R of the planting tool 11 have the scraper 53a of the scrape unit 53 of the scraping device on the front side (the side into which the scrape unit 53 is fitted) of the left and right planting pieces 11L and 11R. Guide plates 60, 60 are welded to the side end portions so as not to be damaged. As shown in the cross-sectional view of FIG. 10, the guide plate 60 has a shape in which a curved surface 60a is formed so as not to be damaged even when the scraper 53a contacts. Therefore, the scraper 53a of the scrape portion 53 is guided by the curved surface 60a of the guide plate 60 and smoothly fits in the left and right planting pieces 11L and 11R. Therefore, it is possible to prevent the scraper 53a formed of rubber material from being damaged, and to maintain the cleaning operation inside the right and left planting pieces 11L and 11R of the appropriate planting tool 11 over a long period of time, so that a good seedling transplanting operation can be performed. Can be done.

  In addition, instead of the guide plate 60 on the above plate, stainless steel round bars are welded and fixed to the side wall portions of the left and right planting pieces 11L and 11R (the left and right planting pieces 11L and 11R are also formed of stainless steel). Even so, since the outer peripheral curved surface of the round bar guides the scraper 53a, the same effect can be obtained, and the side walls of the left and right planting pieces 11L, 11R can be reinforced. Furthermore, without providing other members, the left and right planting pieces 11L, 11R may be bent by providing curved surfaces with the side wall portions facing inward. Further, if a resin sheet with low slip resistance is attached to the scraper 53a so that the scraper 53a can easily slide into the left and right planting pieces 11L and 11R, there is an effect of preventing damage.

  Further, an anti-contact material such as a vinyl pipe that protrudes from the left and right width of the scraper 53a is fixed to the upper or lower surface of the scraper 53a so that the scraper 53a does not directly contact the side wall portions of the left and right planting pieces 11L and 11R. Has an effect of preventing the scraper 53a from being damaged.

  In addition, since the gap 70 is formed between the side wall portions of the left and right planting pieces 11L and 11R, there is an effect of reducing the sound generated when the left and right planting pieces 11L and 11R are closed. In addition, in order to reduce the sound at the time of closing, you may affix a resin board on the lower end part contact surface of the right-and-left planting pieces 11L and 11R.

  FIG. 11 shows another embodiment, in which the base portion of the arm 80 is welded to the rear end portion of the planting tool 11 of the planting device 6 and the rear end thereof is provided rearward. A tension spring 81 is provided between the arm 80 and the handle frame 3a which is the body. That is, the tension spring 81 is configured to act to pull the planting tool 11 obliquely upward at the rear of the machine body. When the planting tool 11 is lifted obliquely upward at the rear of the machine body by the tension spring 81 as described above, the planting tool 11 moves forward and downward during the lowering process of the planting tool 11, so that the lifting is strong. The planting tool 11 acts to lift the planting tool 11 upward with force, and the planting tool 11 moves rearward and upward in the stroke in which the planting tool 11 moves upward. Therefore, the planting tool 11 is moved upward with a relatively weak lifting force. Acts to pull up. Therefore, when the planting tool 11 descends, it acts with a strong pulling force that suppresses the downward inertia force due to the weight of the planting tool 11, and assists the upward movement with a relatively weak force in the process of raising the planting tool 11. Thus, in addition to the operation of the cam mechanism 46 described above, the planting tool 11 operates smoothly while maintaining a predetermined appropriate operation speed, and an appropriate seedling transplanting operation can be performed.

Claims (1)

In a seedling transplanting machine that raises and lowers the planting tool (11) by a lifting mechanism (U) that is driven by a drive unit (44) and moves up and down, planting seedlings in a field, a pair of gears that are transmitted from a plurality of gear pairs. A first transmission that selectively changes gears, a second transmission that selectively changes gear pairs transmitted from a plurality of gear pairs, and a gear pair that transmits power from a plurality of gear pairs And a third transmission that changes gears to transmit to the third transmission via the second transmission, and the lifting mechanism (U ) And the drive side gear of the gear pair of the second transmission device and the drive side gear of the gear pair of the third transmission device , both swinging up and down around the front end (12a). The elevating arm (12) and the front end (below the elevating arm (12)) A sub-link (13) that swings up and down around 3a), and a connecting link (R) that connects the front end (12a) of the elevating arm (12) and the front end (13a) of the sub-link (13) The swinging arm (14) connected to the connecting link (R) and moving the connecting link (R) back and forth, and the connecting arm (12b) at the intermediate part of the lifting arm (12) are connected to the lifting arm (12). ) And a sub crank arm (19) connected to a connecting point (19b) at an intermediate portion of the sub link (13) and swinging the sub link (13) up and down. A seedling transplanter characterized by comprising an elevating mechanism (U) .

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