JPH0453772B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a grain feeding device that feeds and transfers grains one by one or one grain at a time, and which requires several grains or a fixed number of grains. Test grain processing equipment and instruments,
For example, it can be used to supply sample grains to a moisture meter that measures the moisture content of grains, a detector that distinguishes between unhulled rice and brown rice, and the like.

[Prior art and problems to be solved by the invention]

For example, as disclosed in Japanese Unexamined Patent Publication No. 58-2116, it is known that cylindrical objects are aligned and transferred by bringing side and bottom guides close to a screw shaft having a spiral groove formed on the outer periphery.

However, in the above embodiment, when a plurality of cylindrical objects as the objects to be conveyed, which are randomly fed by the bowl 14 on the feed start end side, ride on the spiral groove at the same time, a two-piece feeding condition occurs, and the screw shaft is Since the outer diameter is constant and the relationship with the guide remains unchanged, the two pieces are fed as described above and moved to the terminal side, making it impossible to obtain the necessary alignment.

[Means to solve the problem]

This invention aims to eliminate the above-mentioned drawbacks, and for this purpose, the following technical measures have been taken.

That is, the spiral groove 4 is deep enough to fit one grain of grain 3 in order to spirally move along the axis 2 direction of the rotating peripheral surface 1.
A guide plate 6 approaches the side of the rotating circumferential surface 1 in a substantially tangential manner.
In a grain feeding device that receives grains 3 on the upper side and transfers them one by one by rotation of the feed roll 5, the feed roll 5 has a spiral groove 4 formed with a cylindrical supply start end side that receives the grains. The grain dispensing device is configured such that the terminal end side has a small diameter and a release groove 8 is formed between the front and rear spiral grooves 4 in the transfer direction.

[Action and effect]

A small amount of grains are randomly supplied to the cylindrical rotating circumferential surface 1 on the starting end side of the feed roll 5 and are received by the guide plate 6 and deposited, and when the feed roll 5 is rotated, some of the grains fit into the spiral groove 4. It is transferred and guided while being received by the guide plate 6, and is drawn out in a direction parallel to the shaft 2.

There are cases where two grains are fitted into the spiral groove 4 at a time on the starting end side of the feed roll 5, but during the transfer,
When passing through the small-diameter roll 5, the grains are supported only by the spiral groove 4 and the guide plate 6, so the upper one of the two grains is less susceptible to the pressure of the guide plate 6 and becomes unstable. It is easy to escape from the groove 4, and when it reaches the release groove 8, it can fall halfway down.

Further, the extra grains remaining on the rotating circumferential surface 1 move as the grains fitted in the spiral groove 4 are transferred, and when they reach the release groove 8 part, they fall there and do not reach the terminal end.

In this way, on the transfer start end side of the feed roll 5, the cylindrical portion of the feed roll 5 receives the grains together with the spiral groove 4 to facilitate grain fitting into the spiral groove, and the grains are transferred and guided by the rotation of the feed roll 5. During the process, unstable grains and excess grains are released and dropped at a small diameter part, which improves the accuracy of grain feeding.

〔Example〕

An embodiment of the present invention will be specifically described based on the drawings.

The feed roll 5 has spiral grooves 4 formed on its cylindrical rotating circumferential surface on the starting end side with a depth and width sufficient to fit one grain of grain, and on the terminal side, these spiral grooves A release groove 8 is formed with a smaller diameter on the circumferential surface between the spiral grooves 4, and grains, foreign matter, etc. overflowing from the spiral groove 4 can be caused to fall downward during transfer.

The guide plate 6 has an upper end rotatably mounted on a shaft 9 parallel to the axis 2 of the feed roll 5, and a lower end thereof tangentially presses or approaches one side of the rotating circumferential surface 1 of the feed roll 5. ing. . An arm 10 is provided on the shaft 9 of the guide plate 6, and a spring 12 is interposed between the arm 10 and a bracket 11 fixed to the machine frame to constantly bias the guide plate 6 toward the feed roll 5 side. are doing. Further, the distance between the arms 10 and 10 can be adjusted by bolts 13 screwed into the brackets 11.
By turning 3, the guide plate 6 is moved against the spring 12.
The approach distance to the rotating circumferential surface 1 can be adjusted to be wide or narrow.

Incidentally, small uneven surfaces 14 and 15 may be formed on the surface of the guide plate 6 facing the rotating circumferential surface 1, and in this case, the grains 3 fed out along the spiral groove 4 are provided with resistance. If a plurality of grains are fitted into the spiral groove 4 at the same transfer position due to the rocking of the grain 3 itself, only a single grain is secured.

When a small amount of grain is supplied to the starting end side of the feed roll 5, the grain 3 located above the approach portion 7 is fitted into each spiral groove 4, and this fitted grain 3 is inserted into the spiral groove 4. During this transfer, even if extra grains remain on one part of the rotating circumferential surface, when they reach the release groove 8, they fall from the release groove 8 and enter the spiral groove. is not transferred to the end of the line. Furthermore, even if two or more grains fit into the spiral groove 4, the grains 3 located on the upper side are hard due to the pressure of the guide plate 6, so they float up and escape from the spiral groove 4. Moreover, if this reaches the release groove 8, it will fall on the way. Furthermore, as shown in FIG. 4, an uneven surface 14,
15, it is easy to carry out such an action, and only a single grain is transported along the spiral groove 4,
Each grain is delivered to a predetermined target location.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a side sectional view, Fig. 2 is a plan view, Fig. 3 is an operational side view, and Fig. 4 is a plan view showing some other embodiments. It is. In the figure, 1 is a rotating peripheral surface, 2 is a shaft, 3 is a grain, 4 is a spiral groove, 5 is a feed roll, 6 is a guide plate, 7 is an approach part, and 8 is a release groove.

Claims (1)

[Claims] 1. A feed roll 5 provided with a spiral groove 4 having a depth capable of fitting one grain of grain 3 in order to spirally move along the axis 2 direction of the rotating circumferential surface 1, and a side portion of the rotating circumferential surface 1. and a guide plate 6 approaching almost tangentially to the
In a grain feeding device that receives grains 3 above the approach portion 7 between the feed roll 5 and the guide plate 6 and transfers them one by one by the rotation of the feed roll 5, the feed roll 5 serves as a feeder for receiving the grains. A grain dispensing device in which a spiral groove 4 is formed with a cylindrical shape on the starting end side, and a release groove 8 is formed between the spiral grooves 4, 4, which have a small diameter on the terminal end side in the front and back of the transport direction.