JPS6253128B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a threshing device that threshes grain while moving it within a handling chamber using spiral handling teeth.

As is well known, in crops such as rice and wheat, the grains are concentrated and attached to the tips of the ears, so in a threshing device that threshes the grains, only the tips of the ears are fed into the handling chamber for threshing. is common. However,
In special crops such as soybeans, buckwheat, and rapeseed, the attachment position of the grain (pod) to the stem culm is not constant, and even in the same crop, the attachment position varies up and down.
Furthermore, since moisture content, ripeness, etc. differ depending on the attachment position of the upper and lower parts of the same stem culm, if you use a threshing device for rice and wheat as is during threshing work, it will not only take a long time to thresh, but also This was not practical due to the large amount of loss. On the other hand, threshers and ordinary combine harvesters have been well known in the past, which feed the whole grain including the stem culm into a handling chamber for threshing, but these machines are compared to threshing equipment that threshes only the ears of rice, wheat, etc. The drawbacks were that the machine was larger, heavier, required more power, and had relatively more threshing loss.

Therefore, the applicant first constructed a handling cylinder by attaching a spiral handling tooth with a spiral body wound around the outer periphery, and provided a receiving cylinder around the handling cylinder with a predetermined gap between the spiral handling tooth and the spiral handling tooth. A net is provided, and the grain to be threshed is moved in the axial direction of the handling chamber along a spiral groove formed by the spiral handling teeth and the receiving net by the rotation of the handling cylinder.
We are proposing a new type of threshing device that can feed grain to be threshed along with the stem culm and thresh it. When we conducted threshing tests on several types of crops using this threshing device, we found that although it varied depending on the type of crop and drying conditions, the stem culms clogged the receiving net and all of the threshed grains were not received. It was found that some of the grains (approximately 3 to 4%) were discharged from the culm without leaking through the net.

The present invention was conceived in view of the above-mentioned circumstances, and by providing a connecting tooth between the pitches of the spiral teeth so as to connect adjacent teeth, the present invention achieves movement of the spiral teeth. In addition to the threshing action, the plate-like handling teeth further move and promote the threshing action, and the grain to be threshed on the receiving net is raked upward to improve rotation and movement, eliminating clogging of the receiving net. To provide a threshing device which improves leakage of threshed grains and reduces threshing loss from a culm.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a cylindrical handling chamber with its axis substantially horizontal, and a receiving net 2 is stretched over approximately the lower half of its circumferential surface. The starting end side (the left end in the drawing) of this handling chamber 1 is closed, and the terminal end side is open to form a discharge culm. A supply hopper 3 is provided at the upper part of the starting end side, and the other end side is covered with a cover 4. It is being said. Inside the handling chamber 1, a handling cylinder 5 is installed with a handling cylinder shaft 5a mounted concentrically with the handling chamber so as to rotate in the direction of the arrow, and one end of the cylinder 5 slightly projects outside the handling chamber 1. ing. Spiral handling teeth 6 are provided on the outer circumferential surface of the handling cylinder 5 from its starting end to its terminal end with a predetermined gap between the receiving net 2 and the receiving net 2.

The spiral handling teeth 6 located at the starting end and the terminal end of the handling cylinder 5 have connected handling teeth between the adjacent handling teeth 6, 6 between the pitches so that both handling teeth are connected. A plurality of handling cylinders 5 are provided in the circumferential direction.
A plurality of radial handling teeth 8 are provided in the radial direction between adjacent pitches of the spiral handling teeth 6 located in the middle of the radial direction. The connecting tooth 7 is not limited to a plate as shown in the drawings, but may be shaped like a rasp bar or an L-shaped tooth.In short, the connecting tooth 7 is installed between adjacent spiral teeth 6. The receiving net 2 is provided by the rotation of the handling cylinder 5.
It is sufficient if it can be faced with a wide width.

In addition, the protrusion height of the spiral handling teeth 6, the connecting handling teeth 7, the radial handling teeth 8, the pitch of the spiral handling teeth 6, the number of installed connecting handling teeth 7, the radial handling teeth 8, the rotation speed of the handling cylinder 5, etc. It may be changed as appropriate depending on the type, ripeness, moisture content, etc. of grains A to be removed, and the mesh of the receiving net 2 may also be changed. Further, although not shown, a sorting room is provided below the handling room 1.

In the threshing device having such a configuration, the handling cylinder 5
is rotated at a predetermined number of revolutions in the direction of the arrow in the drawing, and the entire amount of grains A to be threshed, such as soybeans, buckwheat, and rapeseed, is input from the supply hopper 3 and fed into the handling chamber 1. The grains move in the axial direction of the handling chamber 1 along the spiral groove formed between the spiral handling teeth 6 and the receiving net 2, and during this movement are subjected to threshing action mainly due to contact friction with the receiving net 2. , move to the terminal end (culm outlet) of the handling chamber 1. In addition to the threshing action, the connected handling teeth 7 also raise the threshed grains A remaining on the receiving net 2, ensure feeding, promote the threshing action, eliminate clogging of the receiving net 2, and eliminate threshed grains B. Improves leakage. Furthermore, the radial handling teeth 8 are also used to promote the threshing action. The threshed culm discharged from the culm opening at the end of the handling chamber 1 is completely threshed, with almost no threshed grains mixed in, resulting in an extremely good threshing rate.

In particular, the connected handling teeth 7 improve the feeding and threshing action on the starting end side of the handling chamber 1 and the sorting action (leaking of threshed grains) by eliminating clogging of the receiving net 2, and on the terminal end side,
The sorting effect is further improved by scraping off the grains. In addition, by making the mesh of the receiving net 2 on the terminal side slightly larger than the other parts, leakage and sorting of the threshed grains can be improved.

As explained above, according to the threshing device of the present invention, the threshing barrel, which has spiral handling teeth on the outer periphery and connecting handling teeth between the pitches of the spiral handling teeth, is mounted in the handling chamber in which the receiving net is stretched. Therefore, the spiral teeth facilitate the feeding action and also promote the threshing action. In particular, it prevents clogging of the receiving net, improves the leakage of threshed grains, improves the sorting action, and enables efficient threshing work. can be done.

[Brief explanation of the drawing]

The drawing is a schematic side view showing an embodiment of the present invention. 1... handling room, 2... receiving net, 5... handling barrel, 6...
Spiral handling teeth, 7... Connected handling teeth, 8... Radial handling teeth.

Claims (1)

[Claims] 1. A spiral body is wound around the outer periphery of the handling cylinder to form a spiral handling tooth, and connecting handling teeth are provided between the pitches of the spiral handling teeth so as to connect adjacent handling teeth, and the handling cylinder is A receiving net is provided around the circumference with a predetermined gap between the spiral handling teeth and the connected handling teeth, and by the rotation of the handling cylinder,
A threshing device characterized in that the grain to be threshed is threshed while being moved in the axial direction of a handling chamber using spiral handling teeth and connected handling teeth.