JPS5935050Y2 - Adjustment device for the amount of seedlings taken vertically in the seedling planting mechanism of a rice transplanter - Google Patents

Description

[Detailed description of the invention] This invention is a rice transplanter that uses a swinging seedling planting claw to cut out and plant seedlings one by one from the seedling mat on the seedling table. This invention relates to a device for adjusting the amount of seedlings cut in the vertical direction of the machine.

Conventionally, the amount of seedlings taken vertically can be adjusted by vertically moving the seedling stand.
Alternatively, this was done by adjusting the protruding length of the seedling planting claws attached to the planting rod of the swinging seedling planting mechanism, but the seedling platform constantly reciprocated in the lateral direction of the rice transplanter, and the seedling mat Since a vertical feeding mechanism is provided, adjusting the seedling platform up and down as in the former method would make the structure extremely complicated, but adjusting the amount of seedlings taken vertically would be troublesome; In addition to requiring a high degree of skill to adjust the protruding length of the seedling planting claw, there was a risk of damaging the seedling planting claw during the adjustment work.

Therefore, Japanese Utility Model Application Publication No. 47-19325 as a prior art discloses that the middle part of a planting rod having a seedling planting claw at its tip is pivotally connected to a rotating crank protruding from the side surface of a transmission case. In a seedling planting mechanism in which the distal end is rotatably connected to the tip of a swinging rod whose base end is pivotally connected to the transmission case via a pin shaft, the base end of the swinging rod is placed on the side of the transmission case. An eccentric bushing is inserted into the part where the pin for pivoting fits into the boss hole at the base end of the swinging rod, and by adjusting the rotation of this eccentric bushing, the locus of motion of the seedling planting claw is changed. Therefore, while increasing or decreasing the amount of seedlings taken vertically, the eccentric bushing can be fixed at a predetermined adjustment position by fastening the bolt provided through the swinging rod so as to be perpendicular to the boss hole thereof. I am proposing to do so.

However, fixing the seedlings after adjusting the length of the seedlings by tightening bolts that pass through the swinging rod perpendicularly to the boss holes of the swinging rod means that the base of the swinging rod is connected to the bolt. In addition, the base of the swinging rod becomes significantly large due to the fixing bolt, and the size of the base of the swinging rod becomes large due to the fixing bolt. The fixing bolt at the base of the swinging rod is located at a position away from the center of rotation at the base of the swinging rod, so the vibrations that occur when the swinging rod swings may be caused by moving away from the center of rotation as described above. It was increased due to the fixing bolts in position.

The present invention solves the drawbacks of the prior art in the case where the amount of vertical seedling removal is adjusted by changing the locus of movement of the seedling planting claws.

Therefore, in the present invention, a pin shaft for pivotally connecting the end of the planting rod to the tip of the swinging rod is rotatably inserted into the planting rod,
The shaft portion of the pin shaft that fits into the planting rod and the shaft portion that fits into the boss hole of the swinging rod are configured eccentrically, while the shaft portion of the pin shaft that fits into the boss hole of the swinging rod has an eccentric shape. The screw shaft is integrally provided in the same axial direction, and a nut for fastening and fixing the pin shaft to the swinging rod is screwed onto the screw shaft,
Adjustment dials are inserted between the nut and the side surface of the swinging rod, and are fitted into the boss holes of the swinging rod so as not to be rotatable relative to the pin shaft.

The following describes an embodiment of the present invention applied to a riding rice transplanter. In the figure, reference numeral 1 indicates a traveling machine body equipped with a pair of left and right front wheels 2 and rear wheels 3, and the front part thereof is The device 4 is mounted to be movable up and down by a lower link 5 and a top link 6, and the seedling planting device 4 can be raised and lowered from the traveling body 1 side by a lift arm 7.

This seedling planting device 4 includes a transmission case 8, a float 9 attached to the lower surface of the transmission case 8, and a backward-tilting seedling holder attached to the upper surface of the transmission case 8 so as to be movable laterally with the support of guide rails 10 and 11. Instead of the stand 12 and the rocking seedling planting mechanism 13 attached to the front side of the transmission case 8, these are installed on the traveling machine 1.
It is driven via a telescopic shaft 14 from.

The seedling planting mechanism 13 includes a crank 16 fitted to a drive shaft 15 protruding from the side surface of the transmission case 8 , a planting rod 18 having a pair of seedling claws 17 at its tip, and the transmission case 8 .
A swinging rod 21 whose base end is rotatably pivoted by a pin 20 attached to the tip of an arm 19 protruding from the
The end of the planting rod 18 is rotatably pivoted to the tip of the swinging rod 21 by a pin shaft 22 that is adjustably attached to the swinging rod 21 as described later, and 18 is pivotally attached to the tip of the crank 16 with a crank pin 23, so that when the crank 16 rotates in the direction of the arrow, the tip of the seedling planting claw 17 moves along a trajectory of one-dot chain line B or two-dot chain line A. When the seedling stand 1 moves downward,
After one seedling is cut from the seedling mat 29 on the top of the seedling mat 29, the seedling is planted on the field scene 27.

A pin shaft 22, which rotatably connects the end of the planting rod 18 and the tip of the swinging rod 21, is rotatably mounted within a boss 18' at the end of the planting rod 18 via a ball bearing 18''. It consists of a shaft portion 22' that fits into the shaft portion 22', and a shaft portion 22'' that rotatably fits into the boss hole 21'' provided in the boss 21' at the tip of the swinging rod 21. , 22″
are integrally formed with the axes C and D eccentric by an appropriate dimension e, and a shaft portion 22'' that fits into the boss hole 21'' of the swinging rod 21 has a boss that passes through the boss hole 21''. Hole 21
A screw shaft 24 protruding outward is integrally provided on the same axis, and a nut 25 for fixing the pin shaft 22 to the swinging rod 21 in a non-rotatable manner is screwed onto the screw shaft 24. ,
An adjustment dial 26 is inserted between the nut 25 and the end surface of the post 21', and the adjustment dial 26 is connected to the pin shaft 22.
and the boss hole 21'', so that the pin shaft 22 is not rotatable, but the pin shaft 22 is rotatably inserted into the boss hole 21''.

In this configuration, when the nut 25 screwed onto the screw shaft 24 integrated with the pin shaft 22 is loosened, the pin shaft 22 is unfastened from the swinging rod 21, so in this state, the adjustment dial 26 is turned. By this, the pin shaft 22 is connected to the swinging rod 21.
The shaft portion 2 that fits into the boss hole 21'' in the boss 21' of
2'' axis, the distance from the pin 20 at the proximal end of the swinging rod 21 to the end of the planting rod 18 increases or decreases by rotating the pin shaft 22 by the adjustment dial 26. It can be adjusted as follows.

When the distance is minimized as shown in the figure, the movement locus of the tip of the seedling claw 17 becomes as shown by the two-dot chain line in FIG. 2, and when the distance is maximized, The locus of movement of the tip of the seedling planting claw 17 changes as shown by the dashed line in FIG. The seedlings are fixed at the predetermined vertical harvest amount.

Note that the outer peripheral surface of the adjustment dial 26 may be provided with a knurling for preventing slipping.
It would be more convenient if a scale was provided at 6 to indicate the amount of seedlings taken vertically.

As described above, the present invention is based on the preemption described in the claims for utility model registration, and the invention has been developed by using the
・The amount of seedlings taken vertically can be adjusted by turning the adjustment dial in the loosened state, and after this adjustment, the nut can be tightened to fix it in the predetermined adjustment state, making it extremely easy to adjust the amount of seedlings taken vertically. Although it is easy to make, as in the prior art described above, there is an eccentric bush that is inserted into the boss hole of the boss placed on the swinging rod, and the boss on the swinging rod is penetrated in a direction perpendicular to the boss hole. Since fixing bolts are not required, the pivoting part of the swinging rod to the planting rod can be made smaller and lighter in weight. Since the fixing pole I is not provided at a position away from the rotation center of the swinging rod relative to the planting rod, vibrations generated during vertical swinging movement in the seedling planting mechanism can be reduced, and seedlings can be planted stably. It has the effect that it can.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of a riding rice transplanter, Fig. 2 is an enlarged view of the main part of Fig. 1, and Fig. 3 is an enlarged sectional view taken along line III-I in Fig. 2. , Figure 4 is IV-N in Figure 3.
FIG. 8...Transmission case, 18...Planting rod,
17... Seedling nail, 16... Crank,
21... Swinging rod, 22... Pin shaft, 2
2', 22"...Shaft part, 24...
Screw shaft, 25... Oak I, 26...
Adjustment dial.

Claims (1)

[Scope of utility model registration request] The middle part of a planting rod having a seedling planting claw at its tip is pivotally connected to a rotating crank protruding from the side surface of the transmission case, while the distal end of the planting rod is pivoted at its base end to the transmission case. In a seedling planting mechanism of a rice transplanter that is rotatably connected to the tip of a rod via a pin shaft, the pin shaft is rotatably inserted into the planting rod, and the pin shaft is fitted into the planting rod through the pin shaft. The shaft portion and the shaft portion that fits into the boss hole of the swinging rod are configured eccentrically, while the screw shaft is integrated in the same axial direction in the shaft portion of the pin shaft that fits into the boss hole of the swinging rod. A nut for fastening and fixing the pin shaft to the swinging rod is screwed onto the threaded shaft, and a nut is provided between the nut and the side surface of the swinging rod so that it cannot rotate relative to the pin shaft. A device for adjusting the amount of seedlings taken vertically in a seedling planting mechanism of a rice transplanter, which comprises adjustment dials rotatably fitted into boss holes of a swinging rod.