JPS6222089Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides a rotary feeding device for row sowing at the bottom of a hopper storing seeds, and the rotary feeding device places seeds at set intervals in seedling boxes conveyed by a conveyor. This invention relates to a seeding device for row sowing.

Conventionally, in order to change the sowing state from coarse to dense, the grooved feed roll used as the rotary feed device was changed to a grooved feed roll with a different groove depth, or the rotation speed of the grooved feed roll was changed. However, with the former method, it is time-consuming to replace the grooved feed roll, and with the latter method, there are cases where the appropriate number of seeds do not fit into the grooves. There was an inconvenience that it was not possible to sow seeds at the desired density.

The present invention aims to eliminate the above-mentioned drawbacks by devising the structure of the rotary feeding device.

The characteristic structure of this invention to achieve the above purpose is as follows:
The rotary feeding device is constituted by an elastically extensible endless rotary band in which seeding grooves are formed on the outer peripheral surface at appropriate intervals in the circumferential direction and over the entire length in the width direction, and the tension of the endless rotary band is changed. A tension changing device is provided, and the groove width in the circumferential direction of the seeding groove is changed by stretching the endless rotation band by the tension changing device to change the seeding amount,
This configuration provides the following effects.

In other words, since an elastically expandable endless rotating band is used as the rotary feeding device, the width of the seeding groove can be changed by stretching the endless rotating band, so the seeding amount can be adjusted by simply adjusting the tension. can be changed, and regardless of changes in seeding rate,
Since the transfer speed of the seedling nursery box and the rotation speed of the endless rotating belt are constant, seeds are reliably placed in the grooves and the amount of sowing can be changed reliably.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Two drums 2, 2 are rotatably provided on shafts 1, 1 rotatably supported on a fixed frame, respectively.
and a rotating drum 5 for changing the tension.
A rubber belt 6, which is an example of an endless rotating belt for seed supply, is wrapped around the belt conveyor 8, and the rubber belt 6 is driven in synchronism with a belt conveyor 8 driven by an electric motor 7.

Seed grooves 9 are formed on the outer peripheral surface of the rubber belt 6 at appropriate intervals in the circumferential direction and over the entire length in the width direction.
..., and a hopper 10 as a seed supply device and a brush 11 for removing surplus seeds are provided in proximity to the belt 6,
By driving and rotating the belt 6, a certain amount of seeds flowing out from the hopper 10 by opening the shutter 12 attached thereto are filled into the seeding grooves 9 formed in the belt 6, and these seeds are transferred to the conveyor 8. The seedlings are sown in rows at set intervals in the seedling raising box 13 which is transferred to the top.

As shown in FIG. 2, the bearing part 4a of the shaft 4 on which the drum 5 is rotatably mounted is fitted into the vertical elongated hole 3a formed in the fixed guide 3, so that it can slide only in the vertical direction. At the same time, a threaded rod is screwed onto the tongue piece 3b attached to the guide 3 so that the vertical position can be changed, and the bearing part 4a is configured to be able to be pushed up and down by this threaded rod. , constitutes a tension changing device A that changes the tension of the belt 6 by changing the vertical position of the drum 5. The width of the seeding groove 9 can be changed as shown in FIGS. 3A and 3B as the belt 6 is elastically expanded and contracted by changing the tension of the belt 6. In other words, by changing the amount of seeds received from the hopper 10, the amount of sowing can be changed.

The brush 11 is configured such that its support member 11a can slide and be fixed to a support 4b that is integrally connected to the bearing 4a, and is configured to move in conjunction with the change in position of the drum 5. It is configured so that its position can be adjusted independently.

In order to form the belt 6, members that do not deform elastically are attached to an elastic material such as rubber at appropriate intervals, or rigid structural units are connected in a flexible manner, and the units are connected in the shortening direction. Various configuration changes are possible, such as providing an elastic member that acts on the structure.

In addition, the configuration for changing the tension of the rotating endless band is as follows:
Various design changes are possible.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of a sowing device according to the invention,
Fig. 1 is a side view, Fig. 2 is a cross-sectional view taken along line - in Fig. 1, and Figs. 3A and 3B are cross-sectional views of the rubber belt with the sowing groove width changed. 6: Endless rotating belt, 8: Conveyor, 9: Seeding groove, 10: Hopper, 13: Seedling box, A:
...Tension change device.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A rotary feeding device for row sowing is provided at the bottom of a hopper containing seeds, and the rotary feeding device sows seeds in rows at set intervals into seedling boxes conveyed by a conveyor. In the seeding device, the rotary feeding device is equipped with an elastically expandable endless rotating band 6 having seeding grooves 9 formed on the outer circumferential surface at appropriate intervals in the circumferential direction and extending over the entire length in the width direction.
A tension changing device A for changing the tension of the endless rotating band 6 is provided, and the groove width in the circumferential direction of the seeding groove 9 is changed by stretching the endless rotating band 6 by the tension changing device A. A seeding device characterized in that it is configured so that the amount of seeding can be changed by changing the seeding amount. 2. The seeding device according to claim 1, wherein the entire main body of the endless rotating band 6 is made of an elastic material.