JPH0432921Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a desk cutter for cutting stem culms, which cuts stem culms into small pieces.

(B) Prior Art Conventionally, a desk cutter for cutting stem culms is already known, in which a shaft that rotates at low speed and a shaft that rotates at high speed are supported in a casing in parallel, and rotary blades are fixed to each of these rotating shafts.

(c) Problems to be solved by the invention The known desk cutter for cutting stem culms cuts stem culms by placing them freely on the intersection of rotating blades fixed to one shaft and the other shaft. So,
The stem culm floated due to the centrifugal force of the rotating blade, and its posture was disturbed thereby, resulting in poor cutting performance and uneven cut lengths.

(d) Means for solving the problem The present invention supports a shaft that rotates at low speed and a shaft that rotates at high speed in parallel on the casing, and supports the shaft that rotates at low speed in parallel with a plurality of star foil-shaped scratches at intervals. Attach the rings so that they rotate at the same time, and attach them to the shaft that rotates at high speed.
When the star foil-shaped rotary body and the rotary blade are attached, the rotary body is engaged with the scraping ring and rotatably supported, and the rotary blade is adjacent to the rotary body and the outer periphery thereof is By pivoting the raking ring 8 on the side surface of the protrusion so that they rotate together in a superimposed state, the stem culm is held between the raking ring and the protrusion of the rotatable body meshing with the raking ring, and the rotary blade and The above-mentioned problem was solved by cutting with a scraping ring.

(e) Action The stem culm supplied to the desk cutter by an appropriate conveyance device is held between the scraping ring and the rotating body that meshes with it, and in this state, it is cut to a predetermined size by the scraping ring and the rotating blade that rotates at a higher speed. is cut off.

(F) Example An example of the present invention will be explained with reference to the drawings.
Reference numeral 1 denotes a straw conveying device for a threshing device mounted on a combine harvester or a harvester, and is composed of a conveying chain and a guide rail installed opposite to the lower surface of the conveying chain. A pair of rectangular parallel shafts 3 and 4 are rotatably supported, and a V-pulley 5 attached to the front shaft 3 is driven by an appropriate shaft of the threshing device via a V-belt, Since the attached large diameter gear 6 meshes with the small diameter gear 7 attached to the rear shaft 4, the rear shaft 4 rotates faster than the front shaft 3.

In addition, a large number of star foil-shaped scraping wheels 8...
has a hexagonal shaft hole in the center, is fitted onto the front shaft 3 so as not to rotate, and is positioned at regular intervals by collars 9.

On the rear shaft 4, a large number of rotary blades 10 having a hexagonal shaft hole in the center are attached to the scraping wheels 8 arranged at intervals as shown in FIG. The rotary blades 1 are alternately overlapped on one side and the other side and fitted together so as not to rotate.
0... is regulated by the long inner collar 11... and the short collar 12..., and on the outer periphery of the end of the long inner collar 11... whose end faces the outer periphery of the scraping wheel 8... A rotary body 13, which has a star foil shape and meshes with the scraping ring 8, is rotatably fitted, and the blade portion on the outer periphery is connected to the rotary blade 1.
The adjacent rotary blades 1 are superimposed on the sides of the protrusions of 0...
The rotating bodies 13, 13 located between 0 and 10 are positioned by an outer collar 15.

Further, the outer circumferential surface of the protrusion of the scraping ring 8... is perpendicular to the plate surface, and each protrusion 10a... of the rotary blade 10 has its rotation direction side formed into an oblique cutting edge as shown in FIG. 3a. , each of the protrusions 13a of the rotating body 13 is formed into an oblique cutting edge on the opposite side to the rotational direction, as shown in FIG. 3b, and the edges are overlapped.

Further, guide rods 16 are provided on the opposite side of the rotating body 13 of the rotary blades 10, and these guide rods 16 are connected to the rotary blades 10 at the upper part of the engagement starting point O point. The protrusions 10a and 13a protrude upward along the tip rotation locus from the meshing start part O.
The rotary blade 1 is curved so as to retreat toward the middle part of the rotary blade 1, at least in the part corresponding to the cutting action part.
The stem culm is guided close to the side of the protrusion 10a... of the raking wheels 8..., and the straw is removed from the rotating body 1
A guide rod 17 is provided to prevent the straw from coming off the tip of the protrusion 3.

In the desk cutter described above, the straw that is transported and discharged by the straw removal conveyor falls onto the raking wheel 8, which is rotating at a low speed together with the rotating shaft 3 in front, and on the other hand, it falls between the protrusions. transported to the rear,
On the other hand, the rotating body 13 is driven to rotate while meshing with the raking wheels 8 regardless of the rotation of the rear shaft 4, and its protrusions 13a... The rotating blade 10...
rotates integrally with the shaft 4 at high speed to forcibly cut into the clamped waste straw.

During the shredding process, the straw that has fallen between the protrusions of the raking ring 8 is initially caught by the guide rod 16 as shown by a in FIG. When the scraping wheel 8 further rotates, it is held between the protrusion 13a of the rotating body 13 and the protrusion of the scraping wheel 8 as shown by b. At that time, the rotary blade 10 rotating at high speed
cuts into the sandwiched straw, so the rotating body 13 rotates slightly faster than the raking wheel 8, and immediately after that, the front surface c of the base of the protrusion 13a is received by the rear surface d of the tip of the protrusion of the raking wheel 8. The straw is removed between the blade on the back side of the protrusion 13a of the rotary body 13 and the rotary blade 10.
It is cut into a predetermined size by the blade on the rotational direction side of the protrusion 10a, and when the engagement portion between the scraping ring 8 and the rotating body 13 rotates downward and the engagement is released, it is shredded. The cut straw falls to the field below.

During this time, the guide rod 16 allows the supplied straw to move up to the rotary blades 10 and the rotating body 13, and between the tips of the raking wheels 8 and the valleys of the rotary blades 10. The guide rod 17 prevents the waste straw from being pushed out from the tip of the protrusion 13a of the rotating body 13.

(G) Effect of the invention A shaft rotating at low speed and a shaft rotating at high speed are supported in parallel on the casing, and a plurality of star foil-shaped scraping wheels 8 are rotated at the same time at intervals on the shaft rotating at low speed. When the rotary body 13 in the form of a star foil and the rotary blade 10 are mounted on a shaft that rotates at high speed, the rotary body 13 is engaged with the scraping ring 8 and rotatably supported, and the rotary blade 10 is Since the supplied stem culm is attached adjacent to the rotary body 13 and with the outer circumference overlapped with the side surface of the protrusion of the scraping ring 8 so as to rotate together, the supplied stem culm is attached to the scraping ring 8. is sandwiched between the protrusions 13a and 13a of the rotary body 13 that meshes with the protrusions and rotates as a result of rotation,
In this state, the cutting blades of the protrusions 10a of the rotary blades 10, which are rotating at high speed, will cut the pinched stem culms, and unlike conventional ones, the free straw is removed by the rotary blades, etc. It is possible to reliably shred to a predetermined size with high cutting performance without being cut in a state where the posture is disturbed due to centrifugal force.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention,
Figure 1 is a side view, Figure 2 is a longitudinal cross-sectional plan view of the cut section,
FIG. 3a is a sectional view of the protrusion of the floating rotating body, and FIG. 3b is a sectional view of the protrusion of the rotary blade. 3, 4... Shaft, 8... Scraping wheel, 10... Rotating blade, 13... Idle rotary body, 10a, 13a... Protrusion.

Claims (1)

[Scope of utility model registration request] A shaft that rotates at a low speed and a shaft that rotates at a high speed are supported in parallel on the casing, and a plurality of star foil-shaped scraping wheels 8 are attached at intervals to the shaft that rotates at a low speed so that they rotate at the same time, and the shaft rotates at a high speed. When a star foil-shaped rotary body 13 and a rotary blade 10 are mounted on the shaft, the rotary body 13 is engaged with the scraping ring 8 and rotatably supported, and the rotary blade 10 is adjacent to the rotary body 13. A desk cutter for cutting stem culms, characterized in that it is pivoted so as to rotate integrally with the outer periphery thereof overlapped with the side surface of the protrusion of the scraping ring 8.