JPH07147815A - Seedling transplanter - Google Patents

Abstract

PURPOSE:To make it possible to obtain relative rotating characteristics of a planting claw supporting case in a state hardly causing shaking and twisting of a planting claw. CONSTITUTION:This seedling transplanter is constituted by rotatably supporting a rotating case 7 around the first horizontal shaft core X relatively to a planting transmission case 3 and, by relatively rotatably pivoting a planting claw supporting case 8 on the rotating case 7 around the second horizontal shaft core Y so as to draw a prescribed seedling taking-out locus at the top part of the planting claw by relative rotation of the rotating case 7 and the planting claw supporting case 8, accompanying rotation driving of the rotating case 7. In the seedling transplanter, an operating arm 20 integrally rotating with the planting supporting case 8 around the second horizontal shaft core Y is pivoted and coupled through a stretchable supporting mechanism 23 to a fixing supporting point 22a provided on the same shaft center as the first horizontal shaft core X and fixed at a position to the planting transmission case 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supports a rotating case rotatably around a first horizontal axis with respect to a transmission case with a plant, and a relative rotation around a second horizontal axis with respect to the rotating case. The planting claw support case is rotatably supported, and the tip of the planting claw takes a predetermined seedling takeout locus due to relative rotation between the rotating case and the planting claw support case as the rotary case is driven to rotate. The present invention relates to a seedling planting device configured to draw.

[0002]

2. Description of the Related Art In the above-mentioned seedling planting apparatus, conventionally, as disclosed in, for example, Japanese Unexamined Patent Publication No. Hei 5-23028, an operating arm which rotates integrally with the planting claw support case around the second horizontal axis. A cam follower is provided at the swinging end of, and a circumferential groove cam whose distance from the first shaft core changes is formed on a guide plate fixedly attached to the planted transmission case in a state of being installed in the rotation case, In some cases, the cam follower is slidably guided by the groove cam along with the rotation of the rotary case, and the planting claw support case is relatively rotated so that the tip of the planting claw draws a predetermined seedling removal trajectory. .

[0003]

The above conventional structure is a relatively simple structure in which the planting claw support case is rotated relative to the rotationally driven rotary case so as to draw a predetermined seedling takeout locus. It is configured to be able to. However, in the above-described conventional structure, the posture of the planting claw support case, which is pivotally supported about the second axis about the rotation case in a freely rotating state, is regulated by the sliding contact guide between the groove cam and the cam follower. There is a gap between the cam follower and the cam surface due to a machining error,
This gap causes rattling of the planting claw support case and makes the seedling take-out position unstable, and the change of the attitude of the operation arm provided with the cam follower with respect to the groove cam causes a squeeze. There was room for improvement as there was a concern that bracing might occur and smooth guidance could not be provided. The present invention aims to eliminate the above-mentioned problems.

[0004]

A feature of the present invention is that, in the seedling planting device described at the beginning, an operating arm that integrally rotates with the planting claw support case around the second horizontal axis.
The first horizontal axis is provided on the same axis as the first horizontal axis, and a fixed fulcrum that is fixed in position with respect to the planted transmission case is pivotally connected via a stretchable support mechanism.

[0005]

[Operation] With the rotation of the rotating case around the first axis,
The planting claw support case and the operation arm revolve around the axis of rotation, and the support mechanism rotates in conjunction with it.
Since the support mechanism rotates about the fixed fulcrum, the change in the distance due to the displacement of the axis of the rotation shaft is absorbed by the expansion and contraction of the support mechanism. That is, the rotational position of the operation arm around the second axis is determined based on the expansion / contraction amount of the support mechanism. Therefore, for example, if the expansion / contraction amount regulating mechanism such as a cam mechanism or a link mechanism is used to regulate the expansion / contraction amount of the support mechanism, the movement locus of the planting claw support case, that is, the tip of the planting claw is a predetermined seedling removal locus. Can be set to draw. Therefore, since the degree of freedom of the rotational posture of the operation arm that rotates integrally with the planting claw support case is only in one direction along the expansion / contraction direction of the support mechanism, the expansion / contraction amount regulating mechanism moves in only one direction. It is only necessary to control, and it is possible to obtain a stable guide operation with less strain and rattling. Further, since the fixed fulcrum of the support mechanism is provided on the same axis as the rotary axis of the rotary case, the drive shaft of the rotary case can also serve as the fixed fulcrum.

[0006]

Therefore, the rational structure improvement makes it possible to obtain a desired seedling takeout locus with respect to the relative rotational characteristics of the rotary case that rotates and the planting claw support case that is pivotally supported relative to the rotary case. The seedling planting device that can perform the guide operation to determine in such a way that there is no risk of problems due to rattling or bouncing of the planting claw is constructed without the need to install a special member for the fixed fulcrum. It has become possible to provide it easily.

[0007]

Embodiments will be described below with reference to the drawings. Figure 1
Fig. 2 shows a seedling planting device attached to the rear part of the riding type rice transplanter. This seedling planting device forms a frame part by connecting a feed case 2 and a plurality of transmission cases 3 to a square pipe-shaped main frame 1 and mounts a seedling that reciprocates laterally with a constant stroke with respect to the frame part. A table 4, a planting mechanism 5 for taking out and planting the seedlings one by one from the lower end of the seedling stand 4, a plurality of grounding floats 6 and the like are provided.

The structure of the planting mechanism 5 will be described.
As shown in FIGS. 2 and 3, on the left and right sides of the rear portion of each transmission case 3 that is cantilevered with respect to the main frame 1,
A rotary case 7 that is driven to rotate about the first horizontal axis X is provided, and a pair of planting claw support cases 8 are pivotally supported on both ends of the rotary case 7 so as to be relatively rotatable about the second horizontal axis Y. The planting claw support case 8 is provided with a planting claw 9 for taking out seedlings. The rotating case 7 is bolted to the shaft end of the laterally outwardly projecting portion of the drive shaft 22 to which power is transmitted from the feed case 2 side via a transmission chain 12 provided in the transmission case 3 so as to rotate integrally. There is.

As the rotary case 7 is driven to rotate, the relative rotation between the rotary case 7 and the planting claw support case 8 causes the tip of the planting claw 9 to be elliptical in side view. It is configured to draw. That is, the support shaft 19 that pivotally supports the planting claw support case 8 with respect to the rotating case 7 is integrally rotatably connected to the planting claw support case 8 and is attached to the inner side of the case of the support shaft 19. An operation arm 20 is provided so as to be integrally rotatable, and a pin 21 formed on the other end side of the operation arm 20 and a small diameter portion 22a [an example of a fixed fulcrum] formed on the drive shaft 22 are expandable and contractible.
It is pivotally connected via 3. The support mechanism 23 is relatively rotatably fitted to the pin 21 on the operation arm 20 side with respect to the rod 26 integrally formed with the pivotally supporting portion 25 which is rotatably fitted to the drive shaft 22. A cam follower 29 is formed integrally with a pivot member 27 integrally formed with the pivot member 27 so as to be slidably fitted and extendable, and is integrally formed in a lateral direction at a portion of the cylinder member 28 on the drive shaft side. However, the fixing member 24 fixedly connected to the transmission case is engaged with and guided by the circumferential groove cam 30 formed so as to be continuous in the circumferential direction. The respective support mechanisms 23, 23 for the pair of planting claw support cases are separately configured to allow relative rotation about the axis of the drive shaft 22.

Therefore, as the rotating case 7 rotates, the support mechanism 23 rotates in conjunction with the drive shaft 22 and the cam follower 29 is slidably guided along the circumferential groove cam 30 to support the support mechanism. The expansion and contraction amount of 23 is defined, and the relative posture of the planting claw support case 8 is defined so that the tip of the planting claw draws a target locus.

In the interior of the planting claw support case 8, in synchronization with the operation of taking out the seedlings by the planting claws 9, the seedling pushing tool 31 that is pushed out when planting the seedlings held by the planting claws 9 in a field scene. The seedling pushing tool 31 is integrally connected by a connecting tool 32 that is installed across the lateral outer sides of the pair of planting claw support cases 8 and 8, and each planting claw support case 8 and 8 is connected. The cam guides of the cam shafts 33, 33 that rotate relative to the cam shafts 33, 33 are configured to move in and out.

It should be noted that although reference numerals are given in the claims for facilitating the comparison with the drawings, the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

[Figure 1] Side view of seedling plant

FIG. 2 is a cross-sectional plan view of the planting mechanism.

FIG. 3 is a cutaway plan view of the planting mechanism.

[Explanation of symbols]

 3 Transmission case with planting 7 Rotating case 8 Claw support case with planting 9 Claw with planting 20 Operating arm 22a Fixed fulcrum 23 Support mechanism X First horizontal axis Y Second horizontal axis

Claims (1)

[Claims] 1. A rotation case (7) is supported rotatably around a first horizontal axis (X) with respect to a transmission case (3) with a plant, and a second cross direction is supported with respect to this rotation case (7). A planting claw support case (8) is pivotally supported so as to be relatively rotatable around an axis (Y), and the rotary case (7) and the planting claw support are supported by the rotational drive of the rotary case (7). A seedling planting device configured such that the tip of the planting claw (9) draws a predetermined seedling removal trajectory by relative rotation with respect to the case (8). An operating arm (20) that rotates integrally with the planting claw support case (8);
A fixed fulcrum (22a) provided on the same axis as the horizontal axis (X) and fixed in position with respect to the planted transmission case (3) is pivotally connected via a support mechanism (23) capable of expanding and contracting. Seedling planting equipment.