JP2003325031A - Discharged stem cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a discharged stem cutter prevented from clogging by forcedly removing cut stems stuck into a short diameter cutting blade in cutting discharged stems in a long size. <P>SOLUTION: In the discharged stem cutter a first guide member 62 and a second guide member 63 are installed. The first guide unit has a cutting shaft 35 in which a large diameter cutting blade 36 and a small diameter cutting blade 37 are arranged at a predetermined interval. The tip of the first guide member 62 is at a position contacting with a cylindrical surface made by connecting a rotation locus of the periphery of the short diameter cutting blade 37 toward the shaft direction or a position extended toward the side of the cutting shaft 35. The tip of the second guide member 63 is extended to form a space G with a cylindrical surface connecting a rotation locus of the periphery of the large diameter cutting blade 36. The cut stems stuck into the small diameter cutting blade 37 and rotated together with the blade receive a rotational force to contact one end to the first guide member 62 and the other end to move toward the cut part and are released from the small diameter cutting blade. Therefore, the discharged stem cutter is prevented from clogging with the cut stems. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a culm cutting device provided at a rear portion of a combine or the like, and more specifically, it adjusts an axial distance between a cutting shaft and a scraping shaft to cut a culm into long cuts and short cuts. The present invention relates to a culm cutting device that is cut into pieces.

[0002]

2. Description of the Related Art There is an apparatus for mounting a culm cutting device on the rear part of a threshing section such as a combine. As such a culm cutting device, for example, a technique described in Japanese Patent Laid-Open No. 2000-287531 is available. Proposed. In this culm cutting device, the cutting shaft having a plurality of cutting blades and the scraping shaft having a plurality of scraping bodies are substantially parallel to each other in the left-right direction (width direction) of the combine machine body, and the distance between the axes is small. It is arranged to be adjustable. A large-diameter cutting blade and a small-diameter cutting blade are arranged on the cutting shaft at a predetermined interval so that the culm can be divided into long and short cuts. In the present specification, the scraping body disposed on the scraping shaft includes a scraping blade having a sawtooth-shaped tooth on the outer periphery, a receiving blade, and a scraping plate having no tooth on the outer periphery. , The receiving plate, etc.

[0003]

By the way, in the above-mentioned culm cutting device in which culms are cut into long and short cuts, a large-diameter cutting blade for long cutting and a small-diameter cutting blade for short cutting are provided. Since the difference in diameter is small, at the cutting part where the large-diameter cutting blade and the scraping body overlap each other when the culm is long-cut, when the culm is cut by the large-diameter cutting blade, The culm pressed against the large-diameter cutting blade by the body is also pressed against the outer peripheral surface of the small-diameter cutting blade. Further, when the culm is cut, the culm is pushed between the large-diameter cutting blades by the scraping body and pressed against the small-diameter cutting blades.
Therefore, a cutting culm may stab the serrated teeth formed on the small-diameter cutting blade. At this time, if the culm is pierced into the plurality of small-diameter cutting blades arranged between the adjacent large-diameter cutting blades at the same time, the culm is held by the small-diameter cutting blade in a stable shape and rotates together with the small-diameter cutting blade. . That is, the culm is carried around by the small-diameter cutting blade. Then, when the small-diameter cutting blade makes one rotation and is fed to the cutting portion, the newly scraped culm is pressed against the small-diameter cutting blade, and the culm is further stabbed on the stalk previously pierced. Sometimes. In this way, the piles of the cutting sticks stuck on the small-diameter cutting blades cause the clogging of the discharge cutting apparatus.

In view of the above-mentioned circumstances, the present invention forcibly removes the cutting sticks stuck in the small-diameter cutting blade during long cutting of the cutting sticks,
It is an object of the present invention to provide an culm cutting device that prevents clogging.

[0005]

The invention according to claim 1 is
A cutting shaft (35) supporting a plurality of disc-shaped large-diameter cutting blades (36) and a plurality of small-diameter cutting blades (37) at predetermined intervals.
And a scraping shaft (50) that supports a plurality of disc-shaped scraping bodies (52) at predetermined intervals and that is arranged substantially parallel to the cutting shaft (35). 35) and the scraping shaft (50), by adjusting the distance between the shafts, in the culm cutting device (11) capable of dividing the culm into long cuts and short cuts, the tip is attached to the cutting shaft (35). The cutting shaft (35) at a position substantially in contact with a cylindrical surface connecting the outer peripheral edge of the supported small diameter cutting blade (37) in the axial direction.
A plurality of first guide members (62) extended to the shaft side of
A plurality of tips extending so as to form a gap (G) through which a culm can pass, between the tip and a cylindrical surface that connects the rotation locus of the outer peripheral edge of the large-diameter cutting blade (36) in the axial direction. And a second guide member (63).

According to the second aspect of the invention, a cutting shaft (35) supporting a plurality of disc-shaped large-diameter cutting blades (36) and a plurality of small-diameter cutting blades (37) at predetermined intervals, and a plurality of disc-shaped ones. Of the scraping body (52) at a predetermined interval, the scraping shaft (50) arranged substantially parallel to the cutting shaft (35), and the cutting shaft (35) below the cutting shaft (35). ) And a diffusion shaft (56) provided with a spiral body (57), the distance between the cutting shaft (35) and the scraping shaft (50) is adjusted, In an culm cutting device (11) capable of cutting culms into long and short cuts, a rotation locus of the tip is arranged on the cutting shaft (35) at the outer peripheral portion of the spiral body (57) of the diffusion shaft (56). A position in contact with a cylindrical surface that connects the rotation locus of the outer peripheral edge of the small-diameter cutting blade (37) formed in the axial direction,
Alternatively, the culm cutting device has a plurality of culm removing bodies (59) arranged so as to be located on the axial side of the cutting shaft (35) from the position.

The reference numerals in parentheses are for the purpose of contrasting with the drawings, which are for convenience of understanding the invention and have no influence on the scope of the claims. It does not affect.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 to 8 show an embodiment of the present invention. FIG. 1 is a perspective view showing an example of a combine equipped with a culm cutting device according to the present invention, and FIG. FIG. 3 is an enlarged view showing the arrangement of the threshing section and the culm cutting device, FIG. 3 is an enlarged side view of the culm cutting device shown in FIG. 1 when cutting culms long, and FIG. 4 is a spread of the culm cutting device in FIG. FIG. 5 is an exploded perspective view showing a state in which the means is removed, FIG. 5 is a plan view showing a mechanism for switching the axial distance between the cutting shaft and the scraping shaft, and FIG. 6 is a diagram showing the mechanism for switching the axial distance shown in FIG. A side view, FIG. 7 is a side view showing the relationship between the culm removing body and each cutting blade, and FIG. 8 is a side view.
It is an enlarged side view at the time of a short cut in the culm cutting device.

In FIG. 1, a combine 1 is arranged in front of a machine body 3 supported by a pair of left and right crawler traveling devices 2 and 2 (only the left side in the traveling direction is shown in FIG. 1) for cutting and transporting grain stems. A pre-processing unit 5 to perform, a driver's seat 6 arranged on the upper right side of the front of the machine body 3, a threshing unit 7 arranged on the left side of the machine body 3 for threshing a cut culm, and the machine body 3 A grain tank 9 arranged on the right side of the rear of the driver's seat 6 for temporarily storing the grains threshed from the culm,
An auger 10 disposed on the body 3 so as to be located at the rear of the Glen tank 9 for discharging the grain stored in the Glen tank 9, and the body 3 at the rear of the body 3
And a culm cutting device 11 for cutting the culm from which the grains have been threshed and discharging the culm to the outside of the machine.

As shown in FIG. 2, the threshing unit 7 has a handling chamber 15 in which a handling cylinder 13 having a plurality of handling teeth 12 is rotatably arranged, and a processing cylinder having a plurality of blades (not shown). No)
And a processing chamber 19 in which a culm chain 17 driven by a motor 16 is arranged, and a grain which is arranged below the handling chamber 15 and which is dehusked by the handling barrel 13 and the handling tooth 12. The receiving net 20 for receiving the culms which are separated and separating the relatively large culms, and the grains mixed with the culms which are arranged below the handling chamber 15 and the processing chamber 19 and leaked through the receiving net 20. When,
The oscillating sorting section 21 for receiving the grains mixed with the culm scraped from the culm in the processing chamber 19 and separating the culms and taking out the grains, and the swing sorting section 21 formed by the screw conveyor. The first spiral 22 and the second spiral 23, which are arranged below and convey the grains selected by the rocking / sorting section 21 to the grain tank 9, and the Kara-mino fan 25 for sending the sorting wind to the rocking / sorting section 21. , A turbo fan 26, a suction dust fan 27 for sucking and discharging the branches that are blown up by the sorting wind from the Kararan fan 25 and the turbo fan 26 and float above the swing sorting section 21, and And a feed chain 29 that conveys the grain culm received from the processing unit 5 along the handling chamber 15 and delivers the culm that has undergone threshing of the grains to the culm draining chain 17 in the treatment chamber 19. ing.

With such a structure, the combine 1 cuts grain culms in the pretreatment unit 5, transfers the cut grain culm from the pretreatment unit 5 to the feed chain 29, and in the feed chain 29, While being transported along the handling chamber 15, the handling barrel 13 threshes. The waste culms from which the grains have been threshed are carried into the processing chamber 19 and transferred from the feed chain 29 to the culm chain 17. The culms transported by the culm chain 17 are the processing chamber 1
While passing through the inside 9, the stab particles remaining in the culm are scraped off by the processing cylinder. Then, the culms are discharged from the end of the culm chain 17 onto the culm cutting device 11.

As shown in FIGS. 3 to 8, the culm cutting device 11 includes side plates 32a on the left and right sides of a cutter case 31,
The cutting shafts 35 are rotatably supported by bearings (not shown) between the two 32b, and the cutting shafts 35 are provided on the outer peripheral edges via the spacers 33 as shown in FIG. A large-diameter cutting blade 36 having serrated teeth is arranged at an interval p1 and a small-diameter cutting blade 37 having serrated teeth formed on the outer peripheral edge thereof.
Are arranged at an interval p2. A pulley 38 for power transmission and a sprocket 39 having a small diameter are fixed to one end of the cutting shaft 35 on the side plate 32a side. In addition, the pulley 38 is, for example, from the second spiral 23 to the belt 40.
(See FIG. 4) to receive power transmission.

Between the left and right side plates 32a and 32b,
As shown in FIGS. 5 and 6, the support shaft 42 is rotatably supported via a bearing (not shown). The support shaft 4
Moving plates 43, 43 are fixed to both ends of the plate 2 so as to face each other with the side plates 32a, 32b interposed therebetween. Further, a small-diameter gear 45 and a large-diameter sprocket 46 corresponding to the sprocket 39 are fixed to one end of the support shaft 42 on the side plate 32a side, and a chain 47 is provided between the sprocket 39 and the sprocket 46. Have been passed over.

As shown in FIG. 5, a take-in shaft 50 is rotatably supported between the moving plates 43, 43 via a bearing (not shown). On the scraping shaft 50, scraping bodies 52 are arranged at predetermined intervals so as to correspond to the large-diameter cutting blade 36 and the small-diameter cutting blade 37 via a spacer 51, respectively. In addition, the side plate 32a of the take-in shaft 50
A large-diameter gear 55 that meshes with the gear 45 is fixed to one end on the side.

Therefore, the movable plate 43 is swung in the direction of arrow AB (see FIG. 6) about the support shaft 42,
The axial distance between the cutting shaft 35 and the scraping shaft 50 can be adjusted. That is, the cutting length of the culm can be changed by switching the relative positions of the large-diameter cutting blade 36 and the small-diameter cutting blade 37 and the scraping body 52. At this time,
Since the moving plate 43 swings around the support shaft 42, the relative position of the sprocket 39 and the sprocket 46 does not change, and the gear 55 revolves around the gear 45. Therefore, the power transmission state does not change before and after the moving plate 43 swings. The moving plate 43 is fixed to the swing end by a fixing means (not shown).

Further, the take-in shaft 50 is the cutting shaft 35.
Will be driven by the drive source. The rotation speed of the cutting shaft 35 is the same as that of the sprocket 3
9 and the speed ratio of the sprocket 46, and further the speed ratio of the gears 45 and 55, the rotation speed of the take-in shaft 50 is significantly larger than that of the cutting shaft 35. It is slow (the rotation speed of the cutting shaft 35 >> the rotation speed of the take-in shaft 50).

Between the side plates 32a and 32b, as shown in FIG.
As shown in FIGS. 4 and 7, the diffusion shaft 56 is positioned substantially parallel to the cutting shaft 35 and the scraping shaft 50 and below the diffusion shaft 56.
Are rotatably supported via bearings (not shown). The diffusion shaft 56 is provided with a spiral body 57 whose central portion is fixed substantially parallel to the axis of the diffusion shaft 56 and whose both ends are wound around the diffusion shaft 56 in different directions. A pulley 60 is fixed to one end of the diffusion shaft 56 on the side plate 32a side, and the diffusion shaft 56 is rotationally driven together with the cutting shaft 35 by the belt 40 (see FIG. 4).

The spiral 57 has a rotation locus at the tip,
A plurality of stalk removing bodies 59 extended so as to be located at a position in contact with a cylindrical surface that connects the rotation locus of the outer peripheral edge of the small-diameter cutting blade 37 in the axial direction or to the axial side of the cutting shaft 35 from the position. Are arranged at predetermined positions. In this embodiment, the cut debris removing body 59 has a loop 59a formed at the axial center thereof.
Is configured to be elastically deformable. That is, the debris removing body 59 is made of an elastic body. In addition,
A rod-shaped member that does not elastically deform may be used as the cut strip removing body 59.

The upper part of the cutter case 31 is shown in FIG.
As shown in FIG. 7 and FIG. 7, the switching plate 61 is swingably supported in the direction of arrow C-D, and the lower surface thereof has the large-diameter cutting blade when the switching plate 61 is swung in the direction of arrow D. The first guide member 62 and the second guide member 63 are fixed so as to hang down substantially vertically toward the tops of the 37 and the small-diameter cutting blade 37.

The first guide member 62 is disposed so as to be located near one end surface of the large-diameter cutting blade 36,
The tip thereof is provided at a position in contact with a cylindrical surface connecting the rotation locus of the outer peripheral edge of the small-diameter cutting blade 37 in the axial direction, or extending from the position to the axial side of the cutting shaft 35. That is, the tip of the first guide member 62 is extended to a position where it comes into contact with a cutting culm carried by the small-diameter cutting blade 37.

The second guide member 63 is arranged so as to be located substantially in the center of the arrangement interval p1 of the large-diameter cutting blades 36, and the tip thereof is the rotation locus of the outer peripheral edge of the large-diameter cutting blades 36. Is extended to a position where a gap G (see FIG. 7) is formed with a cylindrical surface connecting the two in the axial direction. That is, the tip of the second guide member 63 is extended to a position where it does not come into contact with the culm that is pushed around between the culm carried by the small-diameter cutting blade 37 and the large-diameter cutting blade 36. .

The switching plate 61 is swung in the direction of arrow C,
When the opening formed at the upper end of the cutter case 31 is covered, the culm discharged from the culm chain 17 in the direction of arrow E is slid on the switching plate 61 and discharged to the outside of the combine 1 as it is. . Further, the switching plate 61 is moved to the arrow D
When the opening formed at the upper end of the cutter case 31 is swung in the direction, the drainage discharged from the drainage chain 17 in the direction of arrow E is directly discharged from the opening or the first guide member. 62 and the second guide member 63 are brought into contact with each other and fall onto the large-diameter cutting blade 36 or the scraping body 52.

With such a structure, when cutting the culms, the moving plate 43 is swung to move the scraper corresponding to the large-diameter cutting blade 36 as shown in FIGS. 3, 5 and 6. The position of the take-in shaft 50 is adjusted and fixed so that the insert body 52 is positioned on both sides of the outer peripheral portion of the large-diameter cutting blade 36 and overlaps by f (see FIG. 6) in a side view. on the other hand,
Since the relative position of the diffusion shaft 56 and the cutting shaft 35 does not change, the cutting culm removing body 59 has a rotation track of its tip connecting a rotation track of the outer peripheral edge of the small-diameter cutting blade 37 as shown in FIG. 7. It is set so as to be positioned on the axial side of the cutting shaft 35 by g from the position in contact with the elliptic surface.

As shown in FIG. 3, the switching plate 61 is swung in the direction of arrow D to open the upper part of the cutter case 31. At this time, as shown in FIGS. 3 and 7, the tip of the first guide member 62 has the small-diameter cutting blade 37.
Of the outer peripheral edge of the large-diameter cutting blade 36 is positioned at a position approximately in contact with the axially connected cylindrical surface of the outer peripheral edge of the large-diameter cutting blade 36. And the cutting culm carried by the large-diameter cutting blade 36 is positioned at a position where a gap G is formed so as not to contact the culm.

When the cutting shaft 35 and the diffusion shaft 56 are driven to rotate, the sprocket 39 and the chain 4 are
The take-in shaft 50 rotates via the 7, sprocket 46, gear 45, and gear 55. At this time, the cutting shaft 35
The rotation speed of the sprocket 39 and the sprocket 4
The gear ratio of 6 and the gear ratio of the gear 45 and the gear 55 are reduced and transmitted to the scraping shaft 50.
The rotation speed of is greatly reduced with respect to the rotation speed of the cutting shaft 35. On the other hand, the diffusion shaft 56 is rotationally driven by the belt 40 (see FIG. 4) together with the cutting shaft 35. The rotation speed of the diffusion shaft 56 is set to be higher than that of the cutting shaft 35.

In this state, the drainage chain 17 (see FIG. 2)
As shown in FIG. 3, the culms released from the reference case fall on the cutter case 31 in the direction of arrow E. Then, the culm is directly or in contact with the guide members 62 and 63, and the scraping body 52 or the large-diameter cutting blade 36.
Fall on. Then, the culm is sent to the cutting portion formed by the rotation of the scraping body 52 and the large-diameter cutting blade 36, where the scraping body 52 and the large-diameter cutting blade 36 overlap each other in a side view, With the scraping body 52, a large-diameter cutting blade 3
It is pressed against 6, and is cut by the large-diameter cutting blade 36. The culm cut by the large-diameter cutting blade 36 falls on the diffusion shaft 56, the falling direction is changed by the spiral 57, and the culm is discharged in the arrow F direction.

At this time, since the cut culm to be cut is pushed in the axial direction of the cutting shaft 35 by the scraping body 52, the cut culm is cut by the scraping body 52 into the large-diameter cutting blade 36.
It is pushed in between and pressed against the small-diameter cutting blade 37.
Most of the cuttings fall off between the large-diameter cutting blades 36 and are discharged at a position where the overlap between the scraping body 52 and the large-diameter cutting blades 36 is released. The part is held in a state of being pressed between the large-diameter cutting blades 36, and yet another part may be stuck in the teeth of the small-diameter cutting blade 37. A plurality of the small-diameter cutting blades 37 are provided between the adjacent large-diameter cutting blades 36, 36 (2 in the case of FIG. 5).
When the cutting culms are simultaneously stabbed into the teeth of the plurality of small-diameter cutting blades 37, 37 at the same time, the cutting culms are stabilized in the small-diameter cutting blades 37, 37 substantially parallel to the cutting shaft 35. It will be retained in the state.

The culm pushed and held between the large-diameter cutting blades 36, 36 and the culm pierced by the teeth of the small-diameter cutting blade 37 are rotated by the cutting shaft 35 to allow the large-diameter cutting blade 3 to rotate.
6, 36 or the small-diameter cutting blades 37, 37 are rotated together. That is, the large-diameter cutting blades 36, 36 and the small-diameter cutting blades 37, 37 are carried around.

The culms carried by the large-diameter cutting blades 36, 36 and the small-diameter cutting blades 37, 37 by the rotation of the cutting shaft 35 are the large-diameter cutting blades 36, 36 and the small-diameter cutting blade 3.
When it moves to the lower part of 7, 37, it is knocked down by the cut culm removing body 59 which is rotated by the rotation of the diffusion shaft 56,
It is removed from the large-diameter cutting blades 36, 36 and the small-diameter cutting blades 37, 37.

Since the debris removing body 59 is arranged on the spiral body 57 arranged on the diffusion shaft 56, the rotation locus of the debris removing body 59 during one rotation of the diffusion shaft 56. The culm removing action is performed only in a region where the rotation locus of the culm carried by the large-diameter cutting blade 36 and the small-diameter cutting blade 37 overlaps in a side view. Therefore, the rotational speeds of the cutting shaft 35 and the diffusion shaft 56 are set so that the cutting culms can be removed around the entire circumference of the large-diameter cutting blade 36 and the small-diameter cutting blade while the cutting shaft 35 rotates several times. Keep it. Further, the cut stalk removing body 59 may be arranged not only on the spiral body 57 but also on the diffusion shaft 56 to increase the cut stalk removing action area per one rotation of the diffusion shaft 56.

Further, since rotation of cutting stalks by the large-diameter cutting blades 36, 36 and the small-diameter cutting blades 37, 37 does not always occur, the area for performing the cutting stalk removing operation by the stalk removing member 59 is appropriately selected. By setting, it is possible to prevent clogging of the culm cutting device 11.

The culm which is not removed by the culm removing body 59 and is carried around by the large-diameter cutting blades 36, 36 and the small-diameter cutting blades 37, 37 by the rotation of the cutting shaft 35 is the large-diameter cutting blade. 36, 36 and small-diameter cutting blades 37, 37
When it reaches the top of, the one end of the culm contacts the first guide member 62 and its movement is blocked. On the other hand, since the gap G is formed between the second guide member 63 and the outer circumference of the large-diameter cutting blade 36, the center to the other end of the cutting culm passes through the lower portion of the second guide member 63 and the cutting portion. Move towards. Therefore, the culm receives a rotational force that rotates about the contact position with the first guide member 62. The culm held between the large-diameter cutting blades 36, 36 or the teeth of the small-diameter cutting blades 37, 37 by this rotational force is held from between the large-diameter cutting blades 36, 36, or the small-diameter cutting blades. 37, 37 teeth removed.

At this time, the culm removed between the large-diameter cutting blades 36, 36 or the small-diameter cutting blades 37, 37 has one end side moved to the cutting portion side and its center of gravity moved to the cutting portion side. Therefore, it falls toward the cutting portion, and falls on the diffusion shaft 56 together with the newly cut culm. Therefore, since the cut stalks do not drop to the side opposite to the cutting portion (back side) of the cutting shaft 35, the cut stalks do not accumulate in the cutter case 31.

As described above, the cutting guides 62 are brought into contact with the culms carried by the large-diameter cutting blades 36, 36 and the small-diameter cutting blades 37, 37 by the rotation of the cutting shaft 35 to be removed. In this case, the cutting culm can be removed over the entire circumference of the large-diameter cutting blade 36 and the small-diameter cutting blade 37 every one rotation of the cutting shaft 35.

When the culm is cut into short pieces, as shown in FIG. 8, the cutting shaft 35 and the scraping shaft 50 are arranged so that the small-diameter cutting blade 37 and the scraping body 52 overlap each other in a side view. Adjust the distance. At the time of this short cut, since the culm is cut by the large-diameter cutting blade 36 and the small-diameter cutting blade 37,
There is no stab sticking on the small-diameter cutting blade 37,
Therefore, clogging of the culm cutting device 11 due to piercing of the culm into the small-diameter cutting blade 37 does not occur.

In the above-mentioned embodiment, a cutting strip removing member 59 provided with the cutting shaft, which is carried by the large-diameter cutting blade 36 and the small-diameter cutting blade 37, on the diffusion shaft 56, and a switching plate for the cutter case 31. First guide member 6 provided on 61
Although the case of removing with the 2 and the second guide member 63 has been described, only one of the cut culm removing body 59 and the first guide member 62 (the second guide member 63) is provided to remove the culm. You may

[0038]

According to the first aspect of the present invention, the first guide member having the tip extending above the cutting shaft to the position where the tip collides with the culm carried by the small-diameter cutting blade, and the tip, A second guide member extending to a position where a cutting culm carried by a large-diameter cutting blade does not collide is arranged, and a large-diameter cutting culm sent from a culm conveying device is cut by the first and second guide members. Since the cutting culm carried by the large-diameter cutting blade and the small-diameter cutting blade is caused to collide only with the first guide member while being guided to the blade, the cutting circumstance carried by the large-diameter cutting blade and the small-diameter cutting blade is carried out. The culms can be reliably removed, and the removed culms can be dropped to the cutting portion side to prevent clogging of the culm cutting device due to the culms, thereby cutting and discharging the culms satisfactorily.

According to the invention of claim 2, the diffusion axis is
Multiple cutting strip removal bodies are installed so that the rotation path of the tip is carried by the small-diameter cutting blade on the axis side of the cutting axis from the rotation path of the cutting stick, and it is carried by the small-diameter cutting blade during long cutting of the culm. Since the culm removing body collides with the culm removing body, the culm colliding with the culm removing body can be forcibly removed from the small-diameter cutting blade and clogging of the culm cutting device due to the culm. Therefore, the drainage can be cut off and discharged properly.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a combine equipped with a culm cutting device according to the present invention.

FIG. 2 is an enlarged view showing the arrangement of a threshing unit and a culm cutting device in FIG.

FIG. 3 is an enlarged side view of the drainage cutting device shown in FIG.

FIG. 4 is an exploded perspective view showing a state in which the diffusion means of the culm cutting device shown in FIG. 3 is removed.

FIG. 5 is a plan view showing a mechanism for switching the distance between the cutting shaft and the scraping shaft.

FIG. 6 is a side view of the shaft distance switching mechanism unit shown in FIG. 5;

FIG. 7 is a side view showing a relationship between a stalk removing body and each cutting blade.

FIG. 8 is an enlarged side view of the culm cutting device of FIG. 3 during short cutting.

[Explanation of symbols]

11… Cutting cutting device 35 ... Cutting axis 36 ... Large diameter cutting blade 37 ... Small diameter cutting blade 50 ... Scraping shaft 52 ... scraping body 56 ... Diffusion axis 57 ... spiral 59 ... Cut shavings 62 ... First guide member 63 ... Second guide member G ... Gap

Claims (2)

[Claims] 1. A cutting shaft that supports a plurality of disc-shaped large-diameter cutting blades and a plurality of disc-shaped cutting blades at predetermined intervals, and a plurality of disc-shaped scrapers that are supported at predetermined intervals. In a culm cutting device that has a scraping shaft arranged substantially in parallel with each other, and that can adjust the axial distance between the cutting shaft and the scraping shaft to divide the culm into long cuts and short cuts. , A position where the tip is substantially in contact with a cylindrical surface that connects the rotation locus of the outer peripheral edge of the small-diameter cutting blade supported by the cutting shaft in the axial direction, or a plurality of positions extending from the position to the axial side of the cutting shaft. A plurality of the plurality of guide members extending so as to form a gap through which a culm can pass between the first guide member and a cylindrical surface whose tip connects the rotation locus of the outer peripheral edge of the large-diameter cutting blade in the axial direction. A second guide member,
Waste cutting device. 2. A cutting shaft that supports a plurality of disc-shaped large-diameter cutting blades and a plurality of disc-shaped cutting blades at predetermined intervals, and a plurality of disc-shaped scrapers that are supported at predetermined intervals. And a scraping shaft arranged substantially parallel to the cutting shaft, and a diffusion shaft provided below the cutting shaft and substantially parallel to the cutting shaft and provided with a spiral body, and the shaft of the cutting shaft and the scraping shaft. In the culm cutting device capable of dividing the culm into long cuts and short cuts by adjusting the distance, in the outer peripheral portion of the spiral of the diffusion shaft, the rotation trajectory of the tip is the small diameter arranged on the cutting shaft. An culvert, which has a position where it contacts a cylindrical surface that connects the rotation locus of the outer peripheral edge of the cutting blade in the axial direction, or a plurality of culm removal bodies arranged so as to be located on the axial side of the cutting shaft from that position. Cutting device.