JPH084426B2 - Cutting blade for combined use with disk cutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a disc cutter that cuts culm discharged from a culm outlet such as a combine with a plurality of cutting blades attached to a pair of rotating shafts. The present invention relates to a cutting blade that also serves as a scraper.

(Prior Art) Conventionally, as a cutting blade also for scraping of this kind of disk cutter, there is one described in Japanese Utility Model Publication No. 54-6149.

(Problems to be Solved by the Invention) In the above-mentioned conventional technique, a large isosceles triangular feed blade is provided on the outer circumference of a circular metal plate so as to project a small wave blade group on the outer circumference of the circular metal plate between the feed blades. Since it was formed, there was a drawback that the feeding blade and the small wave blade group did not have a step and a step was formed on the rear side of the feeding blade, and the feeding action and the cutting action were discontinuous. .

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned drawbacks and to provide a cutting blade for combined use of scraping, which can smoothly carry out the scraping scraping and cutting scraps.

(Means for Solving the Problem) While forming a scraping blade edge 2 steeply outward in the rotation direction (a) rearward at predetermined intervals on the outer circumference of a metal disk 1,
A saw blade edge 3 having a small pitch is continuously formed on the blade edge which is gently inclined from the top of the blade edge 2 toward the base of the blade edge 2 which is adjacent to the rear side in the rotational direction (a). The cutting blade also serves as a cutting blade for the disc cutter.

(Operation and Effect of the Invention) The culm dropped and supplied from the culm outlet of the combine is rotated in the rotation direction (a) toward the rear outward at a predetermined interval on the outer circumference of the metal disk 1 of the cutting blade (A) also for scraping. And the cutting edge (2) that is also steeped and is sequentially scraped by the scraping blade edges 2, 2.
Is cut between the cutting blades (B) intersecting with. In this scraping cutting process, the culms that try to escape rearward during the scraping action of the scraping blade edge 2 are saw blade edges 3 of a small pitch that are continuous from the top of the scraping blade edge 2 to the rear. Is continuously swallowed by
Further, even at the cutting position, since the culm is locked by the saw blade edge 3 which has no step with the scraping blade edge 2 and the cutting blade (B) is cut continuously, The engaging action and the cutting action are performed continuously without interruption, the fluctuation of the load is small, and the movement of the culm is smooth, so that the action can be reliably taken in and cut.

(Example) In the example shown in the figure, the disc cutter of the present invention is mounted below the combine culm transport chain 4 of the combine,
Reference numeral 5 is a combine threshing device, and 6 is a cutter case, and a culm supply port 7 is opened above and a culm discharge port 8 is opened below. Reference numeral 9 denotes a switching guide plate, which rotates forward around a pivot 10, opens the supply port 7 as shown in FIG. 1, and supplies the waste culms conveyed by the conveyance chain 4 to the disc cutter. The mouth 7 is closed, and the culm transported by the transport chain 4 can be switched to a posture in which it is guided by the upper surface of the switching guide plate 9 and is transferred and guided to the rear of the disc cutter.

On the upper front side in the cutter case 6, that is, on the side close to the supply port 7, a low-speed rotating shaft 11 formed of a hexagonal shaft material.
A high-speed rotating shaft 12, which is also formed of a hexagonal shaft member, is mounted on the lower rear side of the low-speed rotating shaft 11.

A cutting blade (A), (A) is also attached to the low-speed rotating shaft 11 at predetermined intervals, and a disk having a saw-toothed blade edge is formed on the outer periphery of the high-speed rotating shaft 12. Shaped cutting blades (B), (B)
Is attached to the cutting blades (A) and (A) which are also used for scraping so as to intersect a part of the outer periphery and are held by the blade pressing plates 13, 13 and the positioning collar 14.

The cutting blade (A) also for scraping forms the scraping blade edges 2, 2 which are steeply projected outward in the rotation direction (a) rearward at predetermined intervals on the outer circumference of the metal disk 1, and A saw blade edge 3 having a small pitch unevenness is continuously formed between the top of the blade edge 2 and the base of the scraping blade 2 adjacent to the rear side in the rotation direction (a). The scraping blade edge 2 and the saw blade edge 3 are formed on the outer circumference of the dish-shaped disc 1 which is slightly bent to one side from the bending line (S).

Further, the scraping cutting blade (A) is held by the positioning collar 15 and the blade pressing plates 16, 16.

Reference numeral 17 is a free rotation pipe for preventing wrapping, and 18 is an elastic guide rod. The upper end of the elastic guide rod is attached to a mounting shaft 19 provided on the switching guide plate 9 so as to hang down. It is located within the working range of.

The culm supplied from the culm transport chain 4 into the cutter case 6 through the supply port 7 is a cutting blade that also serves as a scraping blade (A).
By the scraping action of the scraping blade edges 2, 2 and the guide of the guide rod 18, the scraping blade is transferred to the intersection with the cutting blade (B) and cut.

At the time of the scraping action of the scraping blade edge 2 of the scraping / cutting blade (A), the culm which tries to escape to the rear side in the rotation direction (a) is a small pitch continuous from the top of the scraping blade edge 2. Saw blade edge 3,
It is locked by 3 and is scraped and the culms are continuously fed to the cutting part. Further, the culm sent to the cutting portion is continuously pressed and cut by the scraping blade edge 2 and the saw blade edge 3 toward the cutting blade (B) side, so that the cutting action of the culm is intermittent. The load fluctuation is small, the movement of the culm is smooth, and the posture can be surely cut without disturbing the posture.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side sectional view, FIG. 2 is a plan sectional view of an essential portion, and FIG. 3 is a front view of a cutting blade (A) also for scraping. FIG. 4 is a sectional view taken along the line CC of FIG.
5 is a sectional view taken along the line DD of FIG. 3, FIG. 6 is a rear view of the same, FIG. 7 is a right side view, and FIG. 8 is a bottom view. In the figure, reference numeral 1 is a metal disc, 2 is a scraping blade edge, 3 is a saw blade edge, (A) is a cutting blade also for scraping, (B) is a cutting blade, and (a) is
Indicates the rotation direction of the cutting blade (A) that also serves as scraping.

Claims (1)

[Claims] 1. A metal blade 1 is provided with a scraping blade edge 2 which is steeply inclined toward the rear in the rotation direction (a) at a predetermined interval on the outer circumference, and the rotation direction is from the top of the outer scraping blade edge 2. (A) A cutting blade also for scraping in a disc cutter, in which a saw blade edge 3 having a small pitch irregularity is continuously formed on a blade edge gently inclined toward the base of the scraping blade edge 2 adjacent to the rear side. .