JPH0140416Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a planting depth adjusting device for a rice transplanter.

Generally, the float attached to the planting device of a rice transplanter is configured to be moved up and down by a spindle attached below the planting transmission case, and the spindle is exposed below the planting transmission case. The vehicle was not protected by a case and could come into direct contact with other objects while moving forward, resulting in an excessive load.

In order to eliminate such obstacles, the support shaft was made thicker, but not only was it not possible to obtain a sufficient effect, but the weight of the planting device increased, causing the float to sink, resulting in deep planting. Ta.

The present invention is an attempt to improve the above-mentioned drawbacks, and involves extending shaft cases from a central drive case to both sides, and attaching a plurality of planting transmission cases extending rearward to these shaft cases. In a rice transplanter in which a plurality of floats are vertically adjustable at the bottom, the spindle for vertically moving the floats is located between the shaft case and the operating locus of the planting claw, and from the bottom surface of the planting transmission case. The support shaft is arranged on the back side of the upper drive case, and both left and right ends of the support shaft are rotatably supported by support members connected to the shaft case, while the middle of the support shaft is supported by support members connected to the drive case. The support shaft is rotatably supported in at least three locations in the longitudinal direction by a shaft case and a drive case, an operating rod is connected to the support shaft, and the tip of the operating rod is attached to a guide plate. It can be characterized in that it is engaged with.

The embodiment shown in the drawings will be explained below.1
is a four-wheeled rice transplanter equipped with auxiliary seedling stands 2 on the left and right sides of the driver's seat, and a link holder 3 at the rear.
A planting device 4 is attached via a top link 5a and lower links 5b, 5b, and the link holder 3 receives input from the PTO shaft of the machine body 1 and connects it to the left and right planting transmission cases 6 and screw shaft 7a. It is composed of a drive case 7 for distributing power, a pair of planting rods 7b attached to each planting transmission case 6 on the left and right, floats 8, and a seedling stand 9 that reciprocates left and right by the screw shaft 7a. and
The left and right planting transmission cases 6 are fixed to the ends of a shaft case 10 extending from the lower part of the drive case 7 to both sides, and a substantially parallel horizontal frame 11 is arranged at the front of the shaft case 10. It has been done.

Further, a vertical frame 1 fixed to both ends of the horizontal frame 11 is provided.
As shown in Figs. 3 and 4, the rear part of 2 is fixed to the flange of the shaft case 10 and the front part of the planting transmission case 6 by tightening the three together with bolts 13a and nuts 13b. 11 and the drive case 7 are integrally connected by a vertical frame 12a.

The float 8... is the planting transmission case 6.
and an arm frame 14 extending rearward from the central drive case 7 via link arms 15...
4 and a bracket 7c protruding from the rear surface of the shaft case 10, a support shaft 16 is rotatably supported.
As shown in FIGS. 2 to 4, the support shaft 16 is disposed between the shaft case 10 and the operating locus of the planting claw, and on the back side of the drive case 7 above the lower surface of the planting transmission case 6. . As shown in FIG. 5, a support shaft 16 is press-locked onto the arm frame 14 in the center so as to be braked by a locking tool 17 fixed with a bolt 16a, and the support shaft 16 swings integrally with the support shaft 16. arm 16b
... is the link arm 15 via the connecting rod 18...
It is connected to the convex portion 15a at the base of.

FIG. 6 shows another means for locking the support shaft 16 in the braking state, and shows the support shaft 16 and the locking tool 1.
A plate-shaped body 17a having a high coefficient of friction, such as a rubber plate, is interposed between the plate-like body 17a and the plate-like body 17a.

Additionally, an operating rod 1 whose base is fixed to the support shaft 16 is provided.
9 is inserted into a groove 20a with an engaging portion of a guide plate 20 provided upright on the horizontal frame 11.

Furthermore, a fulcrum shaft 21 is provided in the center of the horizontal frame 11 and projects forward. Projection piece 2 protruding from
2, 22 and the upper part of the link holder 3 are suspended by springs 23, 23.

In the above-described device, when the machine body 1 is moved forward while driving the planting device 4, the planting rod 7b scrapes off the seedlings on the seedling platform 9 and plants them on the rice field.

During this time, the planting rod 7b moves up and down, and the wheels of the machine body 1 roll on the tiller, so the planting device 4 vibrates and a bending force is applied to the shaft case 10. The shaft case 10 and the horizontal frame 11 including the vertical frames 12 and 12a are configured as a frame in which both sides and the center are integrally connected when viewed from above, and the planting transmission case 6, the vertical frame 12, and the shaft Since the case 10 and the case 10 are jointly fastened and integrated, it is extremely strong.

In addition, when adjusting the planting depth, by moving the operating rod 19 up and down, the float 8 moves up and down with respect to the machine frame of the planting transmission case 6, drive case 7, shaft case 10, etc., and the planting depth is adjusted. be done.

At that time, the support shaft 16 is connected to the support member 14, which is connected to the drive case 7 and the shaft case 10, as described above.
7c and 7c in the longitudinal direction, and are located on the back side of these case members, so that there is no possibility that other objects may come into contact with the support shaft 16 during forward travel, resulting in an excessive load. There is no risk of it working, and the support shaft 1
The float 8 can be adjusted accurately and easily by ensuring the support of the float 6.

As mentioned above, the present invention has shaft cases extending from the central drive case to both sides, a plurality of planting transmission cases extending rearward to these shaft cases, and a plurality of floats at the bottom that can be adjusted up and down. In the rice transplanter, the spindle that moves the float up and down is arranged between the shaft case and the operating locus of the planting claw, and on the back side of the drive case above the bottom surface of the planting transmission case. The left and right ends of the support shaft are rotatably supported by support members connected to the shaft case, while the middle of the support shaft is attached to the support members connected to the drive case, and the support shaft is attached to the shaft case. and rotatably supported in at least three locations in the longitudinal direction by the drive case,
Since the operating rod is connected to the support shaft and the tip of the operating rod is engaged with the guide plate, the support of the support shaft can be ensured and the float can be adjusted accurately and easily.

In addition, the case components of the planting device can be effectively used to provide strong support without increasing the diameter of the support shaft, which reduces the weight of the planting device and prevents deep planting due to sinking of the float. can.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Figure 1 is a side view of the riding rice transplanter, Figure 2 is a side view of the planting device, Figure 3 is a plan view of the main parts, Figure 4 is a rear view of the same, and Figure 5 is a cross section of the spindle attachment part. FIG. 6 is a sectional view of another example of the same as above. 4... Planting device, 8... Float, 16... Support shaft, 17... Locking tool.

Claims (1)

[Scope of utility model registration request] A rice transplanter in which shaft cases extend from a central drive case to both sides, multiple planting transmission cases extending rearward are attached to the shaft cases, and multiple floats are arranged at the bottom for vertical adjustment. , the spindle for vertically moving the float is placed between the shaft case and the operating locus of the planting claw,
It is arranged on the rear side of the drive case above the bottom surface of the planting transmission case, and both left and right ends of the support shaft are rotatably supported by support members connected to the shaft case, while the middle of the support shaft is attached to a support member connected to the drive case, the support shaft is rotatably supported at at least three locations in the longitudinal direction by the shaft case and the drive case, an operating rod is connected to the support shaft, A planting depth adjusting device for a rice transplanter, characterized in that the tip of an operating rod is engaged with a guide plate.