JPS6016267Y2 - rice transplanter - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a rice transplanter.

Specifically, the machine body supports a seedling stand equipped with a seedling feeding device, and the machine body is provided with a reciprocating device for the seedling platform, and the reciprocating device moves the seedling platform in the direction of seedling feeding by the seedling feeding device. This relates to a rice transplanter that is designed to reciprocate (horizontal feed of seedlings) in a direction perpendicular to (vertical feed of seedlings).

Generally, this type of rice transplanter is equipped with a cam on the rotating shaft of the reciprocating device and a follower cam on the rotating shaft of the seedling feeding device, and the cam collides with the follower cam at the end of the reciprocating motion of the seedling table by the reciprocating device. The seedling feeding device is configured to vertically feed the seedlings placed on the driving waist seedling mounting table.

In this case, a relatively large frictional resistance is acting on the seedlings placed on the seedling platform, and even if the seedling feeding device is driven as described above, the vertical feeding of the seedlings may not be carried out as set. be.

In addition, the amount of contact between the cam and the hollower cam is large relative to the amount of vertical feed of the seedlings, so that the cam and the hollower cam collide deeply, and an unreasonable force is applied to the cam and the hollower cam. There was severe wear and there was a risk of damage.

Therefore, in the present invention, cams are provided at both ends of the feed shaft, and the lead angles of the spiral grooves provided at both ends of the feed shaft are the same, so that the progress of rotation of the feed shaft in the reversal region in which the seedling stand is reciprocated is improved. A follower cam that collides with the cam is arranged at a constant position with respect to the rotating shaft of the cam that rotates from just before the end of the reciprocating movement of the seedling platform to immediately after the start of the reciprocating movement of the seedling platform. , fixed to the rotating shaft, and configured to intermittently drive the seedling feeding device by causing the cam and follower cam to collide two or more times in one rotation of the feeding shaft in a reversing region in which the seedling table is reciprocated. Intimidate,
The seedling feeding device can vertically feed the seedlings extremely reliably, and the amount of contact between the cam and the follower cam can be reduced to reduce wear and tear on the cam and the follower cam,
This was done to ensure that a sufficient amount of vertical feed of the seedlings was obtained.

Embodiments of the present invention will be described below based on illustrative drawings.

In the figure, 1 is a machine body equipped with a float (not shown) at the bottom, 2 is a seedling stand supported on the machine body 1, and 3 is a planting claw provided on the machine body 1, which is attached to the machine body 1 in a horizontal direction. A support arm 5 having a cross-sectional shape extending from the fuselage body 1 is fixed, and a support arm 5 is provided to extend upward from the fuselage body 1.

On the other hand, two upper and lower guide rails 6.7 extending in the lateral direction of the machine body are fixed to the lower surface of the seedling platform 2, and a rod-shaped portion 8 formed integrally with the receiver 4 is inserted into the lower guide rail 6. At the same time, the roller 9 attached to the tip of the support arm 5 is inserted into the upper guide rail 7, and the seedling stand 2 is supported by the machine body 1 so as to be able to reciprocate in the lateral direction of the machine body.

In addition, the middle part of the planting arm 10 is pivotally supported by a rotating shaft 11 mounted on the body 1 via an arm rod 12, and one end of the planting arm 10 is pivotally connected to the body 1. The free ends of the swing links 13 are pivotally connected to each other, and the planting claw 3 is attached to the other end of the planting arm 10, and the planting claw 3 is shown in phantom lines in FIG. It is configured to rotate while drawing a rotation locus like this.

Also, a reciprocating device 14 for reciprocating the seedling platform 2 on the machine body 1.
A seedling feeding device 22 is provided on each of the seedling mounting stands 2.

This reciprocating device 14 consists of a feed shaft 15 rotatably mounted on the machine body 1, and a support shaft 16 mounted on the machine body 1 parallel to the feed shaft 15 so as to be able to reciprocate in the direction of the transverse force of the machine. The feed shaft 15 is interlocked with a transmission shaft 17 mounted on the machine body 1, and a reciprocating spiral groove 18 is formed in the feed shaft 15, and the spiral grooves 18 are provided at both ends of the feed shaft 15. The seedling stand 2 has the same lead angle.
The amount of advance of the rotation of the feed shaft in the reversal region in which the
A pin 20 protruding from the shaft is inserted into the spiral groove 18, and the connecting body 19 and the support shaft 16 are fixed to each other, so that as the feed shaft 15 rotates, the support shaft 16 The seedling stand 2 is attached to brackets 21.2 at both shaft ends of the support shaft 16 that protrude outward from the body 1.
1, and the seedling stand 2 reciprocates in the direction of the lateral force of the machine body as the support shaft 16 reciprocates.

The seedling feeding device 22 is composed of a rotary shaft 23 mounted on the lower part of the seedling platform 2, and a plurality of star wheels 24 inserted and fixed onto the shaft 23. A part of the seedling table 24 is made to face into the seedling table 2 through a cutout window formed in the bottom wall of the seedling table 2, and when the rotation shaft 23 rotates, each star wheel 24 allows a part of the seedling table 2 to be exposed to the seedling table 2. It is configured to send the seedlings sequentially downward (toward the receiver 4 side).

Note that the downward feeding of the seedlings by the seedling feeding device 22 is referred to as vertical feeding, and the movement of the seedlings in the lateral direction of the machine along the receiver 4 based on the reciprocating movement of the seedling platform 2 by the reciprocating device [14] is referred to as vertical feeding. This is called horizontal feed.

Thus, cams 25 and 25 are mounted on both shaft ends of the feed shaft 15 of the reciprocating device 14 that protrude outward from the machine body 1.
while inserting and fixing the cylinders 27 and 27 equipped with one-way rotation transmissions (not shown) to both ends of the rotating shaft 23 of the seedling feeding device 22'. , the follower cam 26.26 that collides with the cam 25.25 is fixed, and immediately after the reciprocating device 14 starts reciprocating the seedling platform 2, immediately before the end of the rhythm, immediately after the start of the backward movement, and immediately before the end of the backward movement. Follower forces l and 2 are applied to the cams 25 and 25 at each position.
6 and 26, and the seedling feeding device 22 is driven intermittently.

The rice transplanter of the present invention is constructed as described above, and when performing rice transplanting work, the machine body 1 is supported via a link on the front of an appropriate mobile agricultural machine, such as a tractor, and the circular zero axis of the mobile agricultural machine is supported. The rotation shaft 11 of the planting claw 3 and the transmission shaft 11 are interlocked with each other.

As a result, the planting claws 3 rotate while drawing a predetermined rotational trajectory to grab a predetermined amount of seedlings on the seedling platform 2 and attach them to the field one after another. As the seedling table 2 is picked up, the reciprocating device 14 moves the seedling table 2 in the lateral direction of the machine body, and when it reaches the end of its movement, it automatically moves back in the opposite direction to perform the so-called lateral feeding of the seedlings. Then, near the reciprocating movement of the seedling platform 2, the seedling feeding device 2
2 is driven, that is, when the seedling stand 2 moves forward from the side end in the lateral force direction of the machine body to the other side, the cam 25 on one side abuts the follower cam 26 immediately after the start of the reciprocation, Immediately before the end of the movement, the cam 25 on the other side collides with the follower cam 26, and if the seedling platform 2 reaches the reciprocating end and starts the backward movement, this cam 25 will collide with the follower cam 26 immediately after the start of the backward movement. Immediately before the end of this return movement, the - side cam 25 again collides with the follower cam 26, and the seedling feeding device 22 is intermittently driven.
The vertical feeding of the seedlings is carried out twice near the end of the reciprocating motion.

In addition, the present invention has a cam 2 in a reversing area for reciprocating the seedling table 2.
5 and the follower cam 26 more than once, the spiral groove 1 provided at both ends of the feed shaft 15 as in the previously described embodiment.
Assuming the lead angle of 8 is the same, 1. In addition, by making the amount of advance relative to the rotation of the feed shaft the same in the reversing region in which the seedling table 2 is reciprocated, the cam 25 and the follower cam 26 are reliably brought into contact twice in the so-called going and returning.
The follower cam 26 may be driven twice by using two cams 25 or by forming two abutting portions 25ay and 25a on the cam 25 as shown in FIG.

In this case, the cam 25 and the follower cam 26 collide with each other at the reciprocating end of the seedling platform 2;
has moved slightly, so the cam 25 is moved so that the cam 25 and follower cam 26 collide with each other regardless of this movement.
Or increase the thickness of the follower cam 26, or increase the thickness of the feed shaft 15.
It is necessary to form the spiral groove 18 so that it becomes substantially straight in the both-side reversal regions, that is, so that the lead angle of the spiral becomes zero.

As explained above, in the rice transplanter according to the present invention, the lead angles of the spiral grooves provided at both ends of the feed shaft are the same, and the amount of advance relative to the rotation of the feed shaft in the reversal region in which the seedling platform is reciprocated is constant; Since the structure is configured so that the cam and the follower cam collide two or more times in one rotation of the feed shaft in the reversal region in which the seedling table is reciprocated, the collision between the cam and the follower cam can always be made without error. Not only can this be done reliably, but the vertical feeding of seedlings is also extremely reliable, especially immediately after the direction of movement of the seedling stand has changed.
By performing the vertical feeding of the seedlings for the second time, the vertical feeding of the seedlings can be carried out even more reliably.In other words, by changing the moving direction of the seedling platform, the seedlings are moved horizontally on the seedling platform, and the seedlings are extremely Since the second vertical feeding of the seedlings is carried out in a state where they can move easily, this vertical feeding of the seedlings becomes even more reliable, and the vertical feeding of the seedlings can now be carried out as set.

Furthermore, by vertically feeding the seedlings in two steps as described above, the amount of contact between the cam for driving the seedling feeding device and the follower cam can be reduced, so that the so-called contact between the cam and the follower cam can be made shallower. By preventing excessive force from acting on the cam and the follower cam, it has become possible to prevent wear and tear on the cam and the follower cam.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a partially omitted side view, FIG. 2 is a longitudinal developed view of the main part, and FIG. 3 is a partial side view showing another embodiment. 1... Aircraft, 2... Seedling stand, 14...
... Reciprocating device, 15 ... Feeding shaft (drive side shaft), 18 - Curved / spiral groove, 22 ... Seedling feeding device, 25 ... Cam, 26... Hollow cam.

Claims (1)

[Scope of utility model registration request] A seedling feeding device in which a feed shaft with a spiral groove is mounted on a machine body, and a seedling stand supported by the machine body has a support shaft with a pin that engages with the spiral groove of the feed shaft, and a rotating shaft. and
A rice transplanter in which the seedling platform is reciprocated in a direction perpendicular to the direction in which the seedlings are fed by the seedling feeding device,
Cams are provided at both ends of the feed shaft, and the lead angles of the spiral grooves provided at both ends of the feed shaft are the same, so that the amount of advance relative to the rotation of the feed shaft in a reversal region in which the seedling platform is reciprocated is constant. The axial position of the cam, which rotates from just before the end of the reciprocating movement of the seedling stand to immediately after the start of the reciprocating movement, with respect to the rotating shaft is constant, and a follower cam that abuts the cam is arranged at the position, and the rotation A rice transplanter, which is fixed to a shaft and configured to cause the cam and follower cam to collide two or more times in one rotation of the feed shaft in a reversing region in which the seedling platform is reciprocated.