JP2004229659A - Straw cutting blade in threshing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a threshing machine or combine harvester excellent in usefulness, improving efficiency of straw unloading, reducing load of a threshing chamber or reducing power load of a blower without decreasing performance of the threshing chamber. <P>SOLUTION: The straw cutting blades H locate on counter positions of a threshing cylinder 4 of a threshing machine, wherein the cutting blade H is composed of a channel-shaped member obtained by folding sheet and parallelly installing protruding blade plates 2 on either side of an attaching part 1, and provided with a contiguous uneven blade edge part 3 comprising tops 3A and valleys 3B from the base ends to the protruding top parts, the uneven blade edge part 3 of the blade plate part 2 is arranged to locate the tops 3A and the valleys 3B on the same plane and the tops 3A and the valleys 3B are arranged on a linear line in the blade edge forming direction by observing from the plate surface direction (the direction watching the thickness of the plate) without forming each of the tops 3A and the valleys 3B of the blade edges as move in and out from either side of the plate by observing from the plate surface direction (a direction watching the thickness of the plate). <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to an improvement of a straw cutting blade which is provided at a position facing a combine or a saw cylinder of a threshing machine and shreds straw waste.

  When threshing is performed by the saw teeth of a rotating saw drum in a saw room, the roots of rice are pinched and held by a transport chain or the like, but considerable straw chips are generated.

  A U-shaped straw cutting blade H is provided in the saw chamber, for example, as shown in FIGS. 1 and 2 so that the straw waste does not catch on the saw teeth.

  The straw cutting blade H has a configuration in which a concave and convex blade edge 3 is provided on a curved upper edge of a blade plate portion 2 protruding left and right on the mounting portion 1 so that the sawtooth 6 passes between the blade plate portions 2. It is fixed at a position facing the saw cylinder 4.

  Therefore, if the cutting condition of the straw cutting blade is not good, the shredding of the straw waste will be insufficient, and the discharge of the straw waste will be poor. Since the load also increases, the efficiency of discharging straw is inferior.

  Therefore, in a combine or threshing machine, it is important to improve the threshing efficiency by adjusting the rotation of the saw cylinder and improving the saw teeth, and at the same time, the quality of the straw cutting blade for shredding the straw at the time of threshing is also extremely important.

  However, since the straw cutting blade has been relatively neglected, the curved upper edge of the blade plate portion is merely formed with an uneven blade edge where the straw is cut.

  That is, since it is difficult to attach the conventional uneven edge to the edge by one-mount-one-mount grinding, the sheet material is formed as shown in FIGS. 8 to 10 in order to easily form the uneven edge (jagged teeth). An uneven surface is formed on the blade edge forming portion of the blade plate portion by pressing, and the uneven surface is glided (grinded) obliquely with respect to the plate surface to sharpen the plate thickness and form the blade edge. 3 is formed.

  That is, after forming an uneven surface by pressing on a blade edge forming side portion serving as a blade plate portion of a plate material, the blade plate portion 2 is bent in a U-shape to be provided side by side, and after hardening, the blade plate portion 2 is provided. In order to sharpen the plate thickness of the blade plate portion 2, the upper edge of the blade plate portion 2 is formed by grinding the outer surface of the blade plate portion 2 inward with respect to the blade plate portion plate surface so as to incline the gliding surface. The portion is formed with a sharp uneven edge 3.

  However, since the conventional straw cutting blade easily attaches the concave / convex blade edge 3 by such a method, even if the concave / convex blade is sharpened by gliding, the top 3A and the valley of the concave / convex blade edge 3 are cut. Since the portion 3B is an uneven blade, it becomes a blade edge that goes in and out of the left and right (not a blade edge on the same line), and the sharpness cannot be said to be sufficient.

  That is, as shown in FIG. 9, when viewed from directly above the blade edge (when the blade plate portion is viewed from the plate surface direction (the direction in which the plate thickness is viewed)), the top portion 3A and the valley portion 3B with respect to the blade edge forming direction. Is not on a straight line (on the same plane), and the top 3A and the valley 3B are left and right with respect to the blade edge forming direction, respectively, and are displaced. It does not have the sharpness of a razor.

  The present invention finds again the importance of straw cutting blades that have been neglected, improves the efficiency of straw discharge, reduces the performance of the saw cylinder, reduces the load on the saw cylinder, and reduces the power load on the blower. In order to be able to provide a breakthrough combiner and threshing machine with excellent practicality, we break down the conventional stereotypes and use simple methods to make the uneven edges move in and out of the right and left. It is an object of the present invention to provide an epoch-making straw cutting blade in a threshing section in which unevenness is arranged in a straight line in the blade edge forming direction on the same plane, and the straw can be finely shredded with a razor-like sharpness. .

  The gist of the present invention will be described with reference to the accompanying drawings.

  A straw cutting blade H disposed at a position facing the sawing drum 4 of the threshing unit. The plate material is formed by bending a plate material into a U-shape, and the blade plate units 2 are juxtaposed on the left and right sides of the mounting unit 1. In the straw cutting blade H, the edge of the blade plate portion 2 has an uneven blade edge 3 in which a top portion 3A and a valley portion 3B are continuous from a base end portion to a projecting front end portion. The top and bottom ridges 3A and the valleys 3B are not formed as the top and bottom ridges 3A and the valleys 3B when viewed from the plate surface direction (the direction of viewing the plate thickness) of the blade plate portion 2. Are located on the same plane, and the top 3A and the valley 3B are arranged in a straight line in the blade edge forming direction when viewed from the plate surface direction (the direction of viewing the plate thickness) of the blade plate portion 2. The present invention relates to a straw cutting blade in a threshing unit, characterized in that the blade is formed in a threshing part.

  In addition, the concave and convex blade edge forming side of the portion serving as the blade plate portion 2 of the plate is inclined and bent, and the concave and convex surface is press-formed on the inclined bent portion to form the concave and convex surface along the plate surface of the plate. 2. The straw cutting blade in a threshing unit according to claim 1, wherein the inclined bend portion 5 formed is glided to form the uneven edge 3.

  The inclined bent portion 5 is configured to be bent outward or inward of the side-by-side blade plate portion 2, and the inclined bent portion 5 is formed along the outer surface or the inner surface of the blade plate portion 2. The straw cutting blade in the threshing unit according to claim 2, wherein the uneven blade edge (3) is formed on each of the blade plate portions (2) by gliding.

  Also, after forming the uneven blade edge forming side of the portion serving as the blade plate portion of the plate material in an outward or inward direction and pressing and forming an uneven surface in the inclined bending portion, the plate material is formed into a U-shape. And a blade plate portion 2 provided with the inclined bent portion 5 having an uneven surface, which is inclined outwardly or inwardly, respectively, on the left and right sides of the mounting portion 1. The top 3A and the valley 3B are continuously formed on the same plane as the outer or inner surface of the blade plate portion 2 by gliding the inclined bent portion 5 along the outer or inner surface of the portion 2 so as to be flush with the outer or inner surface. 4. The straw cutting blade in a threshing unit according to claim 3, wherein the formed uneven edge 3 is formed.

  Since the present invention is configured as described below, the concave and convex edges do not enter and exit from the left and right while the concave and convex edges are formed in a simple manner, and the irregularities, that is, the tops and the valleys are linearly aligned in the blade edge forming direction ( Because it is located on the same plane), the straw can be finely chopped with the sharpness of a razor, and therefore, the cutting resistance is significantly reduced and the cutting quality is significantly improved as compared with conventional straw cutting blades. The durability of straw is improved, the efficiency of straw discharge is improved, the performance of the saw barrel is not degraded, the load on the saw barrel is reduced, and the power load on the blower is also reduced. This makes it possible to provide an innovative combine and threshing machine with excellent practicality.

  In the inventions according to the second, third, and fourth aspects, the present invention can be easily realized by a simpler method.

  In addition, in particular, in the inventions according to the third and fourth aspects, the inclined bent portion protruding outward or inward is glided along the outer surface or inner surface of the blade plate portion, thereby realizing a well-cut uneven edge. Therefore, instead of inclining and gliding with respect to the blade plate portion, the portion forming the concave / convex blade edge is inclined outward or inward, and a portion that projects outward or inward (inclined bending) Part) is projected from the base end along the outer surface or the inner surface of the blade plate part or from the protrusion end to the base end, so that the corner part can be kept at the original thickness, and the thickness of the corner part can be increased. Therefore, the durability and the breaking strength can be remarkably improved as compared with the related art, and thereby the breakage of the saw cylinder can be prevented.

  Therefore, it is a structure that can also exert such an effect of improving strength, and as described above, the uneven edge can be easily formed from the base end portion to the protruding tip portion (also on the curved edge), and the top and bottom of the unevenness can be formed. The valley does not go in and out at all, but can be on the same plane (on the outer surface of the blade plate) and can be a straight edge when viewed from directly above. It becomes a straw cutting blade in an epoch-making threshing unit that can easily realize the sharpness with a simple method.

  Preferred embodiments of the present invention (how to implement the invention) will be briefly described with reference to the drawings, showing the operational effects thereof.

  According to the present invention, the unevenness does not enter and exit from the left and right, but the unevenness, that is, the tops 3A and the valleys 3B are aligned in a straight line (on the same plane) in the blade edge forming direction while the unevenness is the edge 3 in a simple manner. Since it is located, the straw can be finely chopped with a sharpness like a razor.

  Therefore, the cutting efficiency is significantly improved compared to the conventional straw cutting blade, so the straw discharging efficiency is improved, the performance of the saw cylinder is not degraded, the load on the saw cylinder is reduced, and the power load on the blower is also reduced. It is possible to provide an innovative combine and threshing machine with excellent practicality.

  In addition, since the grinding (grinding) is performed along the plate surface of the blade plate portion 2, the gliding can be easily performed, and the inclined bent portion 5 (having an uneven surface) inclined or bent outward or inward. Is ground along the outer surface or the inner surface, so that there is no gliding to the base end of the blade plate portion 2 where no blade edge is formed.

  That is, in the conventional gliding, since the grindstone is inclined inward with respect to the outer surface of the blade plate portion 2 and gliding is performed from the outside of the blade plate portion 2, the base end portion of the blade plate portion 2 which does not form the uneven blade edge 3 is also inclined. In this case, the thick portion at the base end of the blade plate portion 2 is cut (the portion becomes thinner up to the corner portion; see FIG. 7). Therefore, the thick portion is formed at the corner portion. The strength was inferior due to the inability to secure the cracks, and cracks were generated from the cracks, which caused breakage, and the saw blade was sometimes damaged due to the breakage of the straw cutting blade.

  However, according to the present invention, the portion forming the concave / convex blade edge 3 is bent outward or inward instead of being inclined and gliding, and the portion (the inclined bent portion 5) bent outward or inward is projected. ) Is glided along the outer surface or inner surface (unfolded plate surface) of the blade plate portion 2 from the base end to the protruding tip or from the protruding tip to the base end, so that the corner portion remains at the original thickness. Since the thickness of the corner portion can be ensured, the durability and the breaking strength can be remarkably improved as compared with the conventional case, whereby the breakage of the saw body can be prevented.

  Accordingly, the structure is also capable of exhibiting such an effect of improving the strength, and as described above, the uneven edge 3 can be easily formed from the base end to the protruding end (also on the curved edge), and the top of the unevenness can be formed. The 3A and the valley 3B do not enter and leave at all from the left and right, and can be formed on the same plane (on the outer surface of the blade plate portion 2) to form a straight edge when viewed from directly above. A straw cutting blade in the revolutionary threshing unit that can easily realize the sharpness like a razor with a simple method.

  A specific embodiment of the present invention will be described with reference to the drawings.

  In this embodiment, as shown in FIGS. 3 to 5, a plate material is bent in a U-shape, and blade plate portions 2 are protruded from left and right sides of the mounting portion 1 in a juxtaposed state. An example in which the curved upper edge of the portion 2 is applied to a straw cutting blade H in which an uneven blade edge 3 in which a top portion 3A and a valley portion 3B are continuous from a base end portion to a protruding tip portion is formed, In the present embodiment, as shown in FIG. 6, the concave / convex blade edge forming side of the portion that becomes the blade plate portion 2 of the plate material by press working is inclined and bent in a direction that becomes outward when the blade plate portion 2 is formed. At the same time, an inclined surface 5 is formed by press-forming an uneven surface in the inclined portion at the time of pressing.

  In other words, the portions serving as the blade plate portions 2 that are to be juxtaposed by bending the plate material into a U-shape are each inclined and bent in the outward direction, and the embossed surface is formed by embossing. An inclined bent portion 5 is formed.

  Then, after the inclined bent portion 5 is press-formed, the plate material is bent into a U-shape, and the inclined bent portion having an uneven surface is formed on the left and right sides of the mounting portion 1 so as to be inclined outward respectively. After the blade plates 2 provided with the portions 5 are formed side by side and quenched, they are inclined along the parallel outer surfaces of the blade plates 2 so that the outer surface of the blade plate 2 and the gliding surface are flush with each other. By gliding the bent portion 5, the uneven edge 3 in which the top 3A and the valley 3B are continuously formed on the same plane as the outer surface of the blade plate 2 is formed.

  Therefore, in the present embodiment, the unevenness does not enter and exit from the left and right, but the unevenness, that is, the top portion 3A and the valley portion 3B are aligned in a straight line in the blade edge forming direction (the blade plate). Since it is located on the vertical plane of the part 2, the straw can be cut into pieces with a sharpness like a razor.

  Also, instead of inclining and gliding, the portion forming the uneven blade edge 3 is inclined outward and bent, and the outwardly bent portion (inclined bent portion 5) is formed on the outer surface of the blade plate portion 2. Gradient from the base end to the protruding front end along the corners, the corners are unnecessarily glided as in the past and the original thickness is not cut to the base end that does not become a blade edge Since the thickness of the corner portion can be ensured, the durability and the breaking strength can be remarkably improved as compared with the conventional case, whereby the breakage of the saw cylinder can be prevented.

  FIG. 7 shows that a portion forming the uneven blade edge 3 is inclined outward and bent, and a portion bent outward and projected (inclined bent portion 5) is glided along the outer surface of the blade plate portion 2. In the same manner, the unevenness does not enter and exit from the left and right, but the unevenness, that is, the top portion 3A and the valley portion 3B are aligned in a straight line in the blade edge forming direction. Because it is located on a vertical surface, the straw can be cut finely with the sharpness of a razor, and the corners are unnecessarily glided to reduce the thickness to the base end that does not become a blade edge as in the past. It is possible to keep the original thickness without losing the thickness, and to secure the thickness of the corners, so that the durability and the breaking strength are remarkably improved as compared with the conventional one. It can also prevent damage to the torso, and gliding with the inner side Shows another embodiment has.

It should be noted that the present invention is not limited to the present embodiment, and a specific configuration of each component can be appropriately designed.

It is explanatory side view which shows the use condition of the straw cutting blade H. FIG. 4 is an explanatory plan view showing a use state of the straw cutting blade H. It is a perspective view of a present Example. It is a top view of a present Example. It is a front sectional view of a present Example. It is explanatory sectional drawing which shows the manufacturing procedure (the formation method of the inclination bending part 5) of a present Example. It is a perspective view of a conventional example. It is a perspective view which shows another Example (2nd Example) of this invention. It is a top view of a conventional example. It is a front sectional view of a conventional example.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Mounting part 2 Blade plate part 3 Irregular blade edge 3A Top part 3B Valley part 4 Saw cylinder 5 Inclined bent part H Straw cutting blade

Claims (4)

A straw cutting blade disposed at a position opposite to the sawing drum of the threshing unit, wherein the plate material is bent in a U-shape, and the blade plate portions are protrudingly provided side by side on the left and right sides of the mounting unit, In the edge of the blade plate portion, in the straw cutting blade which forms a concave and convex blade edge where a top and a valley are continuous from the base end portion to the protruding distal end portion, the concave and convex blade edge of the blade plate portion is When viewed from the plate surface direction (the direction in which the plate thickness is viewed), the top and the valley do not form a blade edge that enters and exits on the left and right, respectively, and the top and the valley are positioned on the same plane and the plate surface direction of the blade plate A straw cutting blade in a threshing unit, characterized in that a top and a valley are formed on a concave / convex edge which is arranged in a straight line in a blade edge forming direction when viewed from a direction in which the plate thickness is viewed. An inclined fold in which the uneven blade edge forming side of the portion serving as the blade plate portion of the plate is press-formed with an uneven surface in the inclined bent portion, and the uneven surface is formed along the plate surface of the plate. 2. The straw cutting blade in the threshing unit according to claim 1, wherein the curved portion is formed by gliding to form the uneven edge. The inclined bent portion is configured to be bent outward or inward of the side-by-side blade plate portion, and each of the inclined plate portions is glided along an outer surface or an inner surface of the blade plate portion. 3. The straw cutting blade in the threshing unit according to claim 2, wherein the uneven blade edge is formed on a blade plate portion. After forming the concave / convex blade edge side of the portion serving as the blade plate portion of the plate material in an outward or inward direction and pressing and forming an uneven surface in the inclined bent portion, the plate material is folded in a U-shape. A blade plate portion provided with the above-mentioned inclined bent portion which is bent outward and inward and has an uneven surface, respectively, is formed side by side on the left and right sides of the mounting portion, and an outer surface or an inner surface of the blade plate portion. The concave / convex blade edge in which the top and the valley are continuously formed on the same plane as the outer surface or the inner surface of the blade plate portion is formed by gliding the inclined bent portion in a state flush with the outer surface or the inner surface along The straw cutting blade in the threshing unit according to claim 3, characterized in that:

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