JPS6137212Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a vertical feeding device for seedlings on the seedling stand of a rice transplanter, and more specifically, the seedling stand of the rice transplanter is mounted on the seedling transplanting mechanism so that the position can be adjusted freely to increase the amount of seedlings taken. When regulating the reciprocating rotation angle of the driven cam attached to the vertical feeding part of the seedling mat attached to the seedling stand by means of a stopper, the stopper should be used instead of the seedling stand itself. By providing this on the machine body side, which is the fixed side when moving the seedling platform, it is possible to prevent at least the vertical feed amount of the seedlings from increasing when adjusting the reduction in the amount of seedlings taken.

Next, we will explain the drawings of an embodiment in which the present invention is applied to a two-row rice transplanter. A walking type rice planting machine comprising a body 6 which is directly connected to each of the two, and a float 7 on the lower surface of the body 6 that slides on the field surface, and which travels in the direction of arrow A on a pair of left and right wheels with paddy lugs 8, 8. Show the machine.

The wheels 8, 8 are respectively attached to the tips of swing cases 9, 9 whose bases are rotatably mounted on the left and right sides of the transmission case 2, and are driven by a transmission mechanism (not shown) in the transmission case 2 using power from the engine 3. ) and a chain (not shown) in the swing case 9. A hydraulic cylinder 10 operated by a hydraulic pump (not shown) driven by an engine 3 is provided on the upper surface of the transmission case 2, and a swinging rod is pivoted to the tip of a piston 11 of the hydraulic cylinder 10 so as to be horizontally rotatable. 12, the left and right ends of this swinging rod 12, and each of the swing cases 9, 9.
The connecting rod mechanisms 13, 13 connecting the two wheels move the wheels 8, 8 up and down in opposite directions, and the left and right wheels 8, 8 move up and down in unison by the operation of the hydraulic cylinder 10 to raise and lower the aircraft 6. Configure it to do so. Furthermore, the float 7 has a doglegged link mechanism 14 between its front upper surface and the lower surface of the transmission case 2.
On the other hand, the upper surface of the rear part of the float is connected to the transmission case 5 at a midway portion thereof by a seedling depth adjustment rod 15 rotatably pivoted.

A pair of left and right naginata-shaped support members 17, 17 for supporting the seedling stand 16 are provided on the rear left and right sides of the transmission case 5.
Brackets 18, 1 are installed on the rear left and right sides of the transmission case 5 so that the vertical positions can be adjusted freely.
8 is provided protrudingly, and a pair of left and right brackets 19, 1 with seedling amount adjustment parts are also provided on the rear upper surface of the transmission case 5.
9 are fixed with bolts, long holes are formed in the middle and end portions of both the support members 17 and 17, and the middle and lower ends of both the support members 17 and 17 are passed through the respective long holes. It is configured to be fastened to each bracket 18, 19 with bolts 20, 21 in a position adjustable manner, and a portion adjacent to each elongated hole in the middle of both support members 17, 17 is provided with a bolt approximately parallel to the longitudinal direction of the elongated hole. An adjustment bolt 22 is screwed between this threaded portion and the adjustment portion of the bracket 19 with adjustment portion. 23 is a spring.

Furthermore, a longitudinal seedling retrieval frame 25 having a rectangular sliding rail portion 24 formed at one end is mounted between the lower ends of both the halberd-shaped support members 17, 17.
A trochanter 26 is provided at the upper end of each of the seedling trays 7 and 17, while guide rails 27 and 28 having a downward U-shaped cross section are provided along the upper and lower sides of the back surface of the seedling platform 16, and the lower guide rails 28 are connected to the seedling retrieval frame 25. The upper guide rail 2 is slidably fitted into the square sliding rail portion 24 of the upper guide rail 2.
7 onto each trochanter 26, and place the seedling stand 16 on the body 6.
Numeral 29 is a pin for preventing the seedling table from coming off and retractably provided at the upper end of each support member 17. Also, 30,3
Reference numeral 0 designates a pair of left and right operating handles whose bases are fixed to the transmission case 5 separately from the bracket and project rearward approximately parallel to the back surface of the seedling stand 16.

Furthermore, the transmission case 5 has a pair of left and right planting rods 31, 31, each of which has a seedling planting claw 32 at its tip that swings and rotates between the field surface and the seedling extraction port 33 in the seedling extraction frame 25. A seedling planting mechanism 34 configured to
34, a cylindrical cam shaft 37 which rotates via a transmission mechanism 36 from the transmission case 5 is rotatably supported in the rear case 35 of the transmission case 5, and a transverse feed shaft 38 is provided in parallel with this. A boat-shaped key 39, which is slidably provided and attached to the transverse feed shaft 38, engages the reciprocating spiral groove 40 of the cylindrical cam shaft 37, and the rotation of the cylindrical cam shaft 37 causes the transverse feed shaft 38 to move the seedlings left and right. It is configured to horizontally feed by the mat width, and the horizontal feed shaft 38
The left and right tips of the seedling table 16 are brought into contact between the inner surfaces of brackets 41 and 41 protruding from the left and right sides of the seedling table 16, and the seedling table 16 is reciprocated in the direction of movement of the machine in conjunction with the seedling planting mechanism 34.

A seedling mat vertical feed shaft 43 equipped with ratchet wheels 42 at appropriate intervals that protrudes from the top side of the seedling table 16 is attached to the back surface of the seedling table 16 via bearings 44.
Driven cams 46, 46 with one-way feed clutches 45 are provided at both ends of the feed cam 4, and each driven cam 46 is attached to the left and right ends of the cylindrical cam shaft 37.
7 and 47, the seedling pine on the seedling table 16 is vertically fed in the direction of the seedling take-out frame 25 by contacting and rotating the seedling table at the left and right moving ends of the seedling table. At this time, springs 4 are installed between each driven cam 46, 46 and the brackets 41, 41 at the left and right ends of the seedling table.
8 and 48 so that the driven cam 46 and the feed cam 47 are restored to their original positions after the contact between them is released.
3 rotates, and the one-way feed clutch 45 operates so that the seedling pine is vertically fed. In addition, the case 35 and the like facing the back side of the seedling table 16, the seedling table 1
When the vertical position of 6 is moved (in other words, the distance between the seedling take-out frame 25 at the lower end of the seedling platform and the seedling planting mechanism 34 is moved), a position on the machine side that is fixed against this movement, for example, at both ends of the transverse feed shaft 38. Stoppers 49, 49 are provided, and each stopper 49 is configured to come into contact with a protrusion 50 on the back surface of the driven cam 46 on the side of the seedling platform 16, and the driven cam 46 is in the upward movement position of the seedling platform 16. In contrast, when the seedling stand is in a downward position, the driven cam 46 is in an upward position, so that despite the vertical movement of the seedling stand, the rotation angle in the restoring direction, in other words, the vertical feed amount of the seedling pine. The surfaces of the stoppers 49 that come into contact with the protrusions 50 of the driven cams are provided at an appropriate inclination with respect to the vertical movement direction of the seedling stand so that the numbers are the same.

With this configuration, when planting seedlings in the field,
When the machine enters the field, the float 7 is lowered so as to touch the field, the machine moves straight, and the seedling planting mechanism 34 is driven. The seedling platform 16 swings back and forth between the seedling take-out port 33 at 25 and the field scene, and the seedling platform 16 moves laterally in conjunction with the swinging rotation of the planting rod 31. The lower end of the upper seedling pine is cut into individual seedlings by the seedling planting claws 32 at the seedling outlet, and the seedling pine is planted in two rows in this embodiment in the field.

By moving the left and right pair of seedling table support members 17, 17 up and down, the distance between the lower end of the seedling table 16 and the seedling planting mechanism 34 is adjusted, in other words, the distance between the seedling extraction port 33 of the seedling extraction frame 25 and the seedlings is adjusted. The amount of pine seedlings taken by the seedling planting claws 32 can be increased or decreased by moving the distance from the planting claws 32 closer or further away. At this time, the straight line A in Fig. 7 is the vertical movement direction of the seedling platform 16 due to the movement of the seedling platform support member, and the direction in which the seedling platform 16 is moved to the lower position (the position where the amount of seedlings taken is large) is The restoring position of the driven cam 46 is shown by the solid line in FIG. 7, and the feed cam 47 rotates in the direction of arrow B.
When the contact release position between the driven cam 46 and the driven cam 46 is shown by a thick dotted line, the vertical feed shaft 43 rotates by an angle corresponding to the angle θ ₁ from the thick dotted line position to the solid line position, and the seedlings are removed by a corresponding dimension. The mat is the vertical feed shaft 43
When the seedling table 16 is moved upward by a distance H to the position where the vertical feed shaft 43 is indicated by the two-dot chain line in FIG.
In proportion to this distance H, the distance between the seedling removal port 33 and the seedling planting claw 32 in the seedling removal frame 25 increases, and the amount of seedlings taken can be reduced. At this time, the restoring position of the driven cam 46 is moved downward by an angle θ ₂ by the stopper 49.
Therefore, the rotation angle θ ₃ of the driven cam 46 from the contact release position (indicated by the thin dotted line) of the driven cam 45 by the feed cam 47 to the restoring position (indicated by the two-dot chain line) is It is approximately equal to the angle θ ₁ , and the vertical feed amount of the seedling pine can be maintained approximately constant regardless of the operation of vertically moving the seedling platform, in other words, regardless of the operation of adjusting the amount of seedlings to be taken. Note that by changing the shape of the contact surface of the stopper, such as increasing the inclination angle θ ₂ between the vertical movement direction of the seedling support 16 and the contact surface of the stopper 49 with respect to the driven cam protrusion 50, the upward movement of the seedling support 16 ( It is extremely easy to configure the vertical feed amount of the seedling pine to be reduced when the seedling pine is moved in a direction that reduces the amount of seedlings taken.

In this way, in a device in which the amount of seedlings taken is adjusted by mounting the seedling stand on the machine so that its vertical position can be freely adjusted, the seedling mat vertical feed shaft is supported on the back of the seedling stand, and the vertical feed shaft is attached to the vertical feed shaft in one direction. When a driven cam with a clutch is installed and the driven cam is driven from the machine body to vertically feed the seedling mats, if a stopper is provided on the seedling stand itself to regulate the rotation angle of the driven cam, it will be easier to collect the seedlings. When adjusting the amount, the stopper and the driven cam move together with the seedling platform, so the positional relationship between the feed cam attached to the machine and the driven cam attached to the seedling platform changes, causing the vertical feeding of the seedling mats. If the amount changes, the setting position of the stopper must be changed separately and the vertical feed amount of the seedling mat must be reset. If the platform is moved up and down to adjust the amount of seedlings taken, the contact regulation position between the driven cam and the stopper can be automatically changed accordingly, and the posture setting of the stopper can therefore be changed. Instead, it has the effect of automatically keeping the vertical feeding amount of seedling mats constant or decreasing it when adjusting the amount of seedlings to be taken in the direction of decreasing the amount of seedlings taken.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of a two-row rice transplanter, Fig. 2 is a plan view thereof, Fig. 3 is an enlarged side view of the seedling stand support part, and Fig. 4 is a side view of a two-row rice transplanter. 3 is a sectional view taken along the - line in FIG. 3, FIG. 5 is a sectional view taken along the - line in FIG. FIG. 1...Rice transplanter, 6...Machine, 16...Seedling stand,
17... Support member, 25... Seedling removal frame, 27,
28... Guide rail, 46... Followed cam, 45
...One-way clutch, 47...Feed cam, 43...
...Vertical feed shaft, 42...Rawl wheel, 48...Spring, 49...
...stopper, 50...protrusion.

Claims (1)

[Scope of utility model registration request] A seedling stand mounted on the body of a rice transplanter at an angle can be moved relative to the seedling mechanism attached to the machine body to adjust the amount of seedlings taken out. When a driven cam with a one-way clutch attached to the vertical feeding shaft of the seedling pine is reciprocally rotated to vertically feed the seedling pine on the seedling platform, a stopper is provided on the machine body side to regulate the rotation angle of the driven cam. A vertical seedling feeding device on the seedling stand of a rice transplanter.