JP2008182926A - Seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve planting precision while preventing the vibration of a planting part by making the eccentricity ratio of a seedling tank moving at a nonuniform speed with an eccentric gear changeable and reducing the eccentricity ratio in sparse planting. <P>SOLUTION: A laterally movable seedling tank holding a mat seedling with soil is moved at the nonuniform speed with eccentric gears 34, 35, 36, 37 to slow down at a seedling taking position with a seedling planting tool and increase the speed at non-seedling taking positions other than the above position, and eccentricity ratio of the eccentric gear is made to be changeable according to the number of planting seedlings per unit area. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a seedling transplanting machine that takes out seedlings from a seedling tank that is moved laterally by a seedling planting tool and plantes them in a field.

Conventionally, as shown in Patent Document 1, as a transmission device to a seedling planting part, a hydraulic continuously variable transmission, a one-way clutch to a stock transmission mechanism, a planting clutch, and an inconstant speed transmission mechanism are arranged in this order. What is configured to be transmitted through is known.
JP 2005-143340 A

  Conventionally, in a seedling tank that moves laterally from side to side in a seedling transplanter, in order to accurately extract the seedling with the planting tool, it is slow near the seedling extraction position with respect to the seedling planting tool, and in other parts It is designed to move at an unequal speed so as to be faster. The amount of movement of the seedling tank changes depending on the number of seedlings taken out in one step of the horizontal movement of the seedling tank relative to the seedling planting tool, and in particular, the amount of movement of the seedling tank changes greatly in 20 horizontal movements of sparse planting. There was a problem that the vibration of the planting part due to swell increased and the planting accuracy was affected.

  An object of the present invention is to make it possible to change the amount of eccentricity of an eccentric gear of a seedling tank that moves at a non-uniform speed, and to reduce planting accuracy by reducing the amount of eccentricity when sparsely planted, while preventing planting vibration from occurring. The goal is to improve.

In order to solve the above problems, the present invention has taken the following technical means.
That is, the present invention according to claim 1 is such that the laterally movable seedling tank (11) for accommodating the seedling is slow at the seedling extracting position with respect to the seedling planting tool (12), and fast at other non-seedling extracting positions. It is provided so that it can move at an inconstant speed by means of an inconstant speed transmission mechanism (34, 35, 36, 37), and the inconstant speed transmission ratio of the inconstant speed transmission mechanism can be changed. Use a seedling transplanter.

  The seedling tank (11) that moves laterally is transmitted through an inconstant speed transmission mechanism (34, 35, 36, 37) as a transmission device to the seedling tank, and the seedling planting tool (12) While quickly moving quickly at the non-seedling extraction position with respect to the seedling, the seedling extraction position with respect to the seedling planting tool is slowly moved slowly to make it possible to accurately extract the seedling and improve the planting accuracy.

  The unequal speed transmission ratio of the unequal speed transmission mechanism can be changed to a large or small number of stages. The amount of movement of the seedling tank varies depending on the number of seedling removals (the number of times of horizontal feeding) in the horizontal movement process for the seedling planting tool. As the number of seedling removals decreases, the amount of movement changes greatly. For example, in the case of 20 sparse planting lateral movements, the amount of seedling tank movement is the largest, and the vibration that spreads to the planting part also becomes severe. Therefore, at the time of the sparse planting, it can be solved by changing the unequal speed transmission ratio of the unequal speed transmission mechanism from the “large” side to the “small” side.

  In short, according to the present invention, as the amount of movement of the seedling tank, the unequal speed transmission ratio of the unequal speed transmission mechanism is reduced and the lateral movement is sent 24 times when the sparse planting is performed, for example, 20 times or less. In the above, by setting the size at which the inconstant speed transmission ratio is restored, the vibration of the seedling tank can be suppressed, and hence the vibration of the seedling planting part can be prevented, and the planting performance can be improved.

An embodiment of the present invention will be described with reference to the drawings.
1 and 2 show a 6-row Ueda transplanter as an example of a seedling transplanter, and a pair of left and right front wheels 2 and 2 and rear wheels 3 and 3 are installed as front and rear wheels of a vehicle body 1. ing. A steering device having an operation box 4 and a steering handle 5 is installed at the front upper part of the vehicle body, and a seedling planting part 6 that can be moved up and down is provided at the rear part of the vehicle body. A driver's seat 9 is installed on the rear side of the control device, and an engine E that transmits power to each part of the rice transplanter is mounted below the driver's seat.

  The seedling planting portion 6 is mounted on the rear portion of the vehicle body so as to be movable up and down via a lifting link mechanism 7, and is lifted and lowered by a telescopic operation of the lifting hydraulic cylinder 8. The lifting hydraulic valve V that controls the lifting hydraulic cylinder 8 is provided below the step floor on the right side of the machine body.

  In addition, the seedling planting section 6 carries a mat mat seedling with a soil and reciprocates left and right to supply seedlings one by one to the seedling outlets 11b,... Are supplied to the seedling outlet 11b,... By seedling feeding belt 11c,... A structure comprising seedling planting devices 13, 13, and 13 for cutting and planting in the soil, floats (side floats) 14L and 14R for leveling while sliding on the seedling planting surface, a center float 14C, etc. It is said. In the figure, reference numeral 15 denotes a transmission lever, 16 denotes a planting lift lever, and 17 denotes a main clutch pedal.

  A transmission case 20 is disposed on the front side of the traveling vehicle body 1, and a front wheel axle case extends laterally from the left and right side surfaces of the transmission case 20. , 2 are rotatably supported. Further, the rear end of the transmission case 20 is fixed to the rear end of the rear frame extending from the rear end of the main frame 22 to the left and right sides. 23, the rear wheels 3 and 3 are rotatably supported.

  Rotational power from the engine E serving as a prime mover is transmitted as an input transmission mechanism to the mission case 20 from the engine output shaft to the mission input shaft in the mission case 20 via a belt transmission device. . The rotational power transmitted to the mission in the case 20 is shifted by the transmission in the case 20, and then branched into traveling power and external power to be taken out. The traveling power drives the rear wheels 3 and 3 from the front wheels 2 and 2 and the rear wheel transmission shaft 24 through the gear mechanism of the rear wheel transmission case 23. Further, the external take-out power is transmitted to the planting transmission shaft 27 as an output transmission mechanism from the mission case 20 via the PTO output shaft 25, the planting clutch case 26, etc. Power is transmitted to the appendage 6.

  The power transmission to the seedling planting unit 6 is transmitted from the planting drive shaft 28 driven by the planting transmission shaft 27 to the lead cam shaft 31 in the left-right direction via the gear transmission device 30 in the gear case 29. The lead cam shaft 31 is a shaft in which a spiral groove is formed on the outer peripheral surface, and the claw of the lead metal 32 is engaged with this groove. The lateral movement bar 33 to which the lead metal 32 is attached is supported so as to be slidable in the axial direction, and its left and right ends are connected to the seedling tank 11. When the lead cam shaft 31 rotates, the claw of the lead metal 32 moves along the groove of the lead cam shaft 31 so that the lateral movement bar 33 and the seedling tank 11 integrated therewith reciprocate left and right. The gear transmission 30 includes a pair of eccentric gears 34 and 35 having different transmission ratios for transmitting the rotation of the planting drive shaft 28 to the lead cam shaft 31 at an unequal speed, eccentric gears 36 and 37, and several stages. The transmission gear mechanisms 38 a to 38 d and 39 a to 39 d, the transmission gear 40 to the lead cam shaft 31, and the like. The eccentric gears 34 and 35 having a large eccentric amount and the eccentric gears 36 and 37 having a small eccentric amount are provided along the shaft 28. By engagement of the change key 43 moved through the switching lever 41 and the shifter 42, the transmission is switched between the inconstant speed transmission by the eccentric gear 34 having a large eccentric amount and the inconstant speed transmission by the eccentric gear 36 having a small eccentric amount. It is configured. That is, the eccentric gears 34, 35, 36, and 37 serve as unequal speed transmission mechanisms, and the unequal speed transmission ratio is set according to the eccentric amount of each eccentric gear.

  Therefore, at the time of sparse planting (20 seedling tank feed), the operation of the switching lever 41 is switched to the inconstant speed transmission by the eccentric gear 36 with a small eccentric amount. When the plant is not sparsely planted, the transmission is switched to unequal speed transmission by the eccentric gear 34 having a large eccentric amount. When the stock number change lever is operated, it can be linked to this to switch to the inconstant speed transmission by the eccentric gear 36 when the number of stocks is small, and to the inconstant speed transmission by the eccentric gear 34 when the number of stocks is large. .

  In addition, the inconstant speed rotation by the eccentric gear 36 can be changed to the constant speed rotation by the constant speed gear. In this case, it is possible to switch between the constant speed rotation and the non-constant speed rotation, and it is also possible to configure so as to be switched in conjunction with the switching of the number of planted strains. For example, if the planting frequency is 24 (transverse feed frequency 24), the rotation speed is non-uniform, and if the planting frequency is other than that, the rotation speed is constant.

  As shown in FIG. 4, in the configuration in which the rotational power from the seedling planting part is transmitted to the herbicide spraying device 47, when the seedling planting part is transmitted at unequal speed during sparse planting, the herbicide spraying that rotates in conjunction with it is transmitted. Since the apparatus is also driven at an inconstant speed, the inconstant speed conversion is performed by an inconstant speed conversion mechanism that cancels out the inconstant speed rotation during sparse planting. Further, even in the fertilizer rotor 48 that drives and rotates in a state where it is in contact with the farm scene to level the farm scene or in the fertilizer application device 49 that spreads fertilizer while planting seedlings, the rotational power is taken out from the seedling planting section. In the configuration, similarly to the above, when the seedling planting part is transmitted at a non-uniform speed, the scraper rotor 48 and the fertilizer application device 49 are driven at a non-uniform speed, so that the non-uniform rotation is performed similarly to the herbicide spraying apparatus. It is desirable that the inconstant speed conversion mechanism cancels out the inconstant speed conversion.

  As shown in FIGS. 5 and 6, in a rotary seedling planting apparatus 13 that alternately acts with a plurality of seedling planting tools 12, 12 to plant seedlings, the seedling planting tool 12 is a seedling collector in a seedling tank 11. A separation claw 12a that takes out seedlings one by one from the outlet 11b, an extrusion fork 12d that swings the extrusion arm 12c by the rotation of the extrusion cam 12b and pushes out the seedling held by the separation claw 12a, and the extrusion arm 12c of the fork 12d Of the plurality of planting tools, the pushing spring 12e is urged toward the pushing action side. Only the planting tool 12 on one side can be attached by removing the mounting bolt 51 and reversing the separation claw 12a by approximately 180 degrees, and by providing a locking device for locking the extruded fork 12d while retracted. The two seedling planting tools 12 are prevented from scraping seedlings from the seedling tank 11. If the amount of lateral movement of the seedling tank is originally ½ of the amount of movement, it can be changed from 70 to 35 sparse plants.

  Further, as shown in FIG. 7, only one planting tool 12 can change the angle downward about the horizontal axis Q1 so as not to scrape the seedling from the seedling tank, and the lateral movement of the seedling tank. If ½ is reduced, it can be changed from 70 to 35 sparse plants. As shown in FIGS. 8 and 9, the angle change fixing means of the planting tool is configured to change the angle by pulling the lock pin 53 against the spring 54 from the pin hole 55a and inserting it into the pin hole 55b.

  Furthermore, as shown in FIG. 10, the seedling planting tool 12 is changed 90 degrees laterally about the axis Q2, or as shown in FIG. 11, the separation claw 12a of the planting tool 12 is moved from the solid line position to the virtual line. It is possible to prevent the seedling from being scraped off from the seedling tank by moving backward to the state position.

  Moreover, in the Example shown in FIG.12 and FIG.13, it was set as the structure which moves the seedling tank 11 intermittently, and the planting tool 12A of the one side of the rotary type planting apparatus took the seedling (FIG. 13 (I)). After that, the lateral movement of the seedling tank 11 is stopped (see FIG. 13B), and even after the other planting tool 12B passes the seedling outlet 11b, the seedling tank 11 passes through after scraping off the seedling. After that, the seedling tank moves sideways (see FIG. 13 (c)), the planting tool 12A on one side scrapes off the seedling, and the seedling tank stops (see FIG. 13 (d)), thereby the planting tool 12B. Swings empty. By repeating such an operation, it is possible to change from 70 to 35 sparse plants. When setting a standard planting, it is possible to change the gear so that the seedling tank moves every time, even if one planting tool 12A passes or the other planting tool 12B passes.

  The embodiment shown in FIGS. 14 and 15 has a configuration in which a plurality of work lights 57a and 57b are arranged on the front and rear of the handle post 56 having the steering handle 5. The front work lamp 57a is attached so as to irradiate forward and downward, and the rear work lamp 57b is attached so as to irradiate downward and downward. According to this, it is possible to illuminate the operation panel portion and the area around the pedal at the foot, making it easier to work at night.

Side view of rice transplanter Top view of rice transplanter Transmission route diagram of the main part of the seedling planting part Side view of main parts of rice transplanter Side view of rotary seedling planting device Rear view of the same seedling planting device Action side view of seedling planting device Side view of fixing means for changing angle of planting tool Rear view of the main part Rear view of seedling planting device Side view of seedling planting tool Side view of seedling planting device Action explanatory diagram showing the relationship between the lateral movement of the seedling tank and the seedling planting tool Side view of main parts of rice transplanter Top view of the main part

Explanation of symbols

6 Seedling planting part 11 Seedling tank 12 Seedling planting tool 28 Planting drive shaft 31 Lead cam shaft 33 Lateral moving rod 34 Eccentric gear 35 Eccentric gear 36 Eccentric gear 37 Eccentric gear

Claims (1)

  The inseparate transmission mechanism (34, 11) is arranged so that the laterally movable seedling tank (11) accommodating the seedling is slow at the seedling extraction position with respect to the seedling planting tool (12) and fast at other non-seedling extraction positions. 35, 36, 37) is provided so as to be capable of moving at a non-uniform speed, and the non-uniform speed transmission ratio of the non-uniform speed transmission mechanism is provided so as to be changeable.

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