JP2023060932A - Threshing device - Google Patents

Abstract

To provide a threshing device improved in threshing performance in which the threshing remain with grain remaining in cobs is hard to occur, even as for the crops such as the corn.SOLUTION: Corn is hooked to a first threshing unit 321, and is rotated with a threshing cylinder 30 while being pressed on a receiving net 50, and thereby a lot of grain is threshed from cobs. The corn with a lot of grain being threshed is conveyed from the first threshing unit 321 to a second threshing unit 322, and is moved with the rotation of the threshing cylinder 30 while being sandwiched to the second threshing unit 322 and the receiving net 50. A length in an anti-rotating direction of the second threshing unit 322 is longer than a gap (S3) between a tip 90a of a helix blade 90 in the radial direction of the threshing cylinder 30 and the receiving net 50. Also, a gap (S2) between the second threshing unit 322 and the receiving net 50 is set in the substantially same degree as the diameter of the cob or in the slightly narrow degree. Accordingly, the corn is moved in a state of being pressed on the receiving net 50 by the second threshing unit 322, and the grain is threshed even from the cob with the threshing remain.SELECTED DRAWING: Figure 4

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a threshing apparatus mounted on a general-purpose combine or the like to thresh while conveying harvested crops between a receiving net by rotation of a threshing cylinder.

Generally, a general-purpose combine is equipped with a threshing device for threshing crops harvested by a harvesting unit. Conventionally, a threshing apparatus has been proposed in which helical blades are provided on the outer peripheral surface of a rotating cylindrical threshing cylinder (also called a rotor), and a locking member is provided between adjacent blades (Patent Document 1). . In general, when a crop such as corn is conveyed in a lateral orientation perpendicular to the direction of rotation of the drum, it is caught by the bristle tooth or the like provided on the drum and pressed against the receiving net. In such a state, it is easy to be subjected to threshing action as it rotates with the threshing drum. On the other hand, when the corn is transported vertically parallel to the direction of rotation of the threshing cylinder, the corn tends to enter between the blades and be discharged out of the machine without being subjected to the threshing action. Therefore, in the threshing apparatus described in Patent Document 1, by guiding the crops to the receiving net side by the hooking member, even crops such as corn are prevented from being discharged out of the machine without being threshed.

JP 2016-178901 A

As described above, in the apparatus described in Patent Document 1, the hooking member guides the corn to the receiving net side, thereby preventing the unthreshed crop from being discharged to the outside of the machine. However, the conventional threshing action was not sufficient, and there were cases where "unhandled" crops were discharged out of the machine.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a threshing apparatus with improved threshing performance that makes it difficult for unhandled crops to occur even for crops such as corn.

A threshing device (3) according to an embodiment of the present invention is
It has a cylindrical threshing cylinder (30) and receiving nets (50) arranged at intervals along the outer peripheral surface of the threshing cylinder, and threshing while conveying crops according to the rotation of the threshing cylinder. A threshing device that
The handling barrel is
A helical blade (90) formed on the outer peripheral surface;
a wiping member (32) disposed between the blades adjacent to each other in the direction of the rotation axis of the throttling cylinder;
The handling member comprises:
The first threshing is formed so as to extend in the anti-rotational direction opposite to the rotational direction of the threshing cylinder as the distance from the outer peripheral surface of the threshing cylinder increases, and the crops are pressed against the receiving net and threshed as the threshing cylinder rotates. a part (321);
It is formed so as to be continuous with the first threshing part on the upstream side in the rotational direction and protrude toward the receiving net side from the tip (90a) of the blade in the radial direction of the threshing cylinder. a second threshing unit (322) that thresh the crops conveyed from the first threshing unit with the rotation while sandwiching it between the receiving net and the threshing unit;
It is characterized by

The second threshing part (322) has a length in the counter-rotational direction that is longer than the gap between the tip of the blade and the receiving net in the radial direction.

The second threshing part (322) has a top surface (327) linearly extending in the counter-rotational direction and a projection protruding from the top surface toward the receiving net so as to press the crop against the receiving net. and a part (330).

The squeezing member (32) is fixed to the outer peripheral surface of the squeezing cylinder between the blades adjacent to each other in the direction of the rotation axis.

The handling cylinder (30) has a reinforcing member (35) that protrudes in the radial direction from the outer peripheral surface of the handling cylinder between the blades that are adjacent in the rotation axis direction, and that connects and reinforces the adjacent blades. have
The treating member (32) has a notch (325) engageable with the reinforcing member and is fixed relative to the blade in engagement with the reinforcing member through the notch. be.

The reference numerals in parentheses are for comparison with the drawings, but they do not affect the description of the claims.

According to the first aspect of the present invention, the threshing member disposed between the blades rotates together with the threshing drum while the crop is hung on the receiving net to thresh the crop conveyed from the first threshing section. , and the second threshing part thresh while being sandwiched between the receiving net and the second threshing part. Therefore, it is possible to provide a threshing apparatus with improved threshing performance that hardly leaves even crops such as corn left unhandled. That is, the corn before threshing is reliably guided to the threshing member according to the blade and conveyed while being pressed against the receiving net by the threshing member, thereby promoting the threshing action of the corn, thereby improving the threshing performance of the threshing device. can do.

According to the second aspect of the present invention, the length of the second threshing part in the anti-rotational direction is longer than the gap between the tip of the blade and the receiving net in the radial direction of the threshing cylinder. is further promoted, and grains can be threshed in the first threshing section even for crops that have not been completely threshed and have leftovers.

According to the third aspect of the present invention, the gap between the second threshing section and the receiving net is narrowed by the projecting portion, and the corn can be conveyed while being reliably pressed by the receiving net. As a result, even if the crop is corn smaller than the standard size, the corn is strongly sandwiched between the second threshing unit and the receiving net and conveyed, so that the corn can be threshed with less unhandled corn.

According to the fourth aspect of the present invention, the shaving members are fixed to the outer peripheral surface of the scouring cylinder between the blades adjacent to each other in the direction of the rotation axis, so that the scouring members can be easily attached to the scouring cylinder.

According to the fifth aspect of the present invention, since the handling member is attached to the blade by engaging with the reinforcing rib, it is difficult to bend and deform due to the load applied when threshing the crops. In addition, it becomes easier to position the handling member when attaching it.

The side view which shows a suitable general-purpose combine using the threshing apparatus which concerns on this embodiment. Side sectional drawing which shows a threshing apparatus. The side view which shows a handling cylinder. Front sectional drawing which shows a handling drum and a receiving net. The perspective view which shows some receiving nets. The figure explaining a reinforcement plate and a detachable vertical beam. (a) A side view and (b) a perspective view showing the treating member of the first embodiment. It is a figure showing the threshing member of the second embodiment, (a) a side view showing the case where a round bar member is provided in the second threshing part in the direction intersecting the rotation direction of the threshing drum, (b) the second threshing. A perspective view showing a case where a round bar member is provided in the second threshing section in a direction intersecting with the rotation direction of the threshing cylinder, (c) showing a case where the round bar member extends obliquely in the second threshing section when viewed from above. Top view, (d) Side view showing the case where the round bar member is obliquely installed in the second threshing part as seen from the top, (e) In the direction intersecting the rotation direction of the threshing drum in the second threshing part The side view which shows the case where three round-bar members are extended, (f) The perspective view which shows the case where the three round-bar members are extended in the rotation direction of a threshing cylinder in the second threshing part. It is a figure showing another embodiment of the threshing member, (a) a side view showing the case where the second threshing part is a curved surface, (b) a projecting member is provided on the downstream tip side of the second threshing part Side view showing the case, (c) Side view showing the case where the projecting member is provided at the upstream end of the second threshing part, (d) Shows the case where the projecting member is provided approximately in the center of the second threshing part Side view.

An embodiment of the present invention will be described below with reference to the drawings. First, a general-purpose combine harvester suitable for use with the threshing apparatus of the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 and 2, the illustration of a receiving network, which will be described later, is omitted in order to facilitate understanding of the explanation.

As shown in FIG. 1, a general-purpose combine harvester 1 includes a traveling machine body 1A, a harvesting unit 2 for harvesting crops (grain culms), a threshing device 3 for threshing and sorting grains from crops fed with whole culms, and a sorting machine. A grain tank 4 for storing threshed grains, a discharge auger 5 for discharging the grains in the grain tank 4 to the outside of the machine, a post-processing section 6 for post-processing threshed culms, and a driver on board. It is composed of a driving operation unit 7 and a crawler type traveling unit 8 .

The reaping unit 2 includes a header 9 that is connected to the front end of the traveling body 1A so as to be able to move up and down, a divider 10 that divides the uncut grain culms at the front end of the header 9, and the uncut grain culms. A cutting blade 11 for reaping, a reel 12 for raking in uncut and reaped grain culms, an auger 13 for collecting the raked-in grain culms at predetermined positions in the width direction, and threshing the grain culms collected by the auger 13. A conveying feeder 14 for conveying to the device 3 and throwing the whole culms into the threshing device 3 is provided.

The threshing device 3 has a threshing unit 20 and a sorting unit 60 provided below the threshing unit 20, as shown in FIG. The sorting unit 60 sorts out a mixture of grains and bracts falling from the grains 20 through a receiving net 50 (see FIG. 4 to be described later). The threshing device 3 of the present embodiment is suitable for threshing corn with hard and thick cobs (for example, dent corn) as crops.

The threshing part 20 includes a threshing chamber 21 into which corn conveyed from the conveying feeder 14 is thrown, a cylindrical threshing drum 30 rotatably supported inside the threshing chamber 21 and extending in the front-rear direction, and a threshing drum. An arc-shaped receiving net 50 (see FIG. 4) is detachably arranged below the net 30 . In the case of this embodiment, as will be described later in detail, a plurality of servicing teeth 31 and shaving members 32 are arranged in the rotation axis direction of the scouring cylinder 30, and mainly according to the rotation of the scouring cylinder 30 The corn is threshed by the threshing member 32 and the receiving net 50 . The threshed grains (corn grains) and the threshed cobs are sieved by a receiving net 50 while being conveyed by the threshing cylinder 30 in a mixed state, and are roughly sorted.

The sorting unit 60 has an oscillating sorting body 61 located below the receiving net 50 and a winnow fan 62 located below the front part of the oscillating sorting body 61 . The oscillating screening body 61 comprises an oscillating transfer plate 63, a chaff sieve 64, a rack 65, and a straw rack 66, and screens the mixture falling from the receiving net 50. As shown in FIG. In addition, the fan 62 blows air from the lower front portion to the upper rear portion of the rocking sorting body 61, and removes the bracts and the like from the mixture moving on the rocking sorting body 61 through the discharge port 69. It is configured to be blown out of the machine and sorted. Further, the threshed cob is discharged out of the machine through the discharge port 69 .

A first spiral 67 for recovering the sorted grains to the grain tank 4 (see FIG. 1) is provided behind the fan 62, and a blower fan 24 is provided behind the first spiral 67. A second helix 68 is provided on both sides. At this second helix 68, the unsorted grain is collected and returned onto the swinging transfer plate 63 or into the handling chamber 21.

Next, the handling cylinder 30 and the receiving net 50 will be described with reference to FIGS. 3 to 6 while referring to FIG. As shown in FIG. 3 , the handling cylinder 30 has a cylindrical handling cylinder main body 33 , a side plate 34 integrated with the handling cylinder main body 33 , and a rotating shaft 40 . The rotating shaft 40 is inserted through the threshing cylinder main body 33 and is rotatably supported by the front and rear side walls of the threshing device 3 which are arranged opposite to the threshing cylinder main body 33 with a predetermined gap in the rotation axis direction. As the rotating shaft 40 rotates, the handling cylinder body 33 and the side plate 34 rotate together.

As shown in FIGS. 3 and 4, a spiral blade 90 is formed on the outer peripheral surface of the handling cylinder main body 33 to rake the crops conveyed from the conveying feeder 14 into the innermost part of the handling chamber 21 and convey them. there is Reinforcing ribs 35 are provided as reinforcing members between adjacent spiral blades 90 (between spiral blades). A plurality of reinforcing ribs 35 are arranged at intervals in the rotation direction (circumferential direction) of the handling cylinder 30 so as to extend along the rotation axis direction between adjacent spiral blades 90 . The reinforcing ribs 35 are reinforced by connecting adjacent spiral blades 90 so that the spiral blades 90 are not easily bent when conveying corn (including the case of conveying threshed cobs). The reinforcing ribs 35 are provided so as to be parallel to the rotation axis of the handling cylinder 30 (specifically, the rotation shaft 40).

The spiral blade 90 is provided with a plurality of tines 31 detachably attached by screws 300 so as to protrude toward the receiving net 50 side (receiving net side) mainly for threshing rice and wheat. . Rice, wheat, etc., thrown into the threshing chamber 21 are laddered between the threshing teeth 31 and the net 50 when conveyed along the threshing drum body 33 in the rotational axis direction by the spiral blades 90. He is threshed.

A wiping member 32 is detachably provided on the outer peripheral surface of the wiping drum 30 between adjacent spiral blades 90 . In this embodiment, the corn that has been raked into the threshing chamber 21 is threshed by being pressed against the receiving net 50 by the threshing member 32 and conveyed. It is threshed by being sandwiched between 32 and the receiving net 50 and conveyed. In this embodiment, the tines 31 are removed and the threshing members 32 are attached when threshing corn, and the threshing members 32 are removed and the tines 31 are attached when threshing rice, wheat, or the like.

That is, the treating member 32 is fixed to the attachment hole of the treating tooth 31 by a common screw 300 as a fixing member so as to be replaceable with the treating tooth 31 described above. FIG. 4 shows an example in which two handling teeth 31 are replaced with a handling member 32 . The handling member 32 is attached to the spiral blade 90 in engagement with the reinforcing rib 35 and arranged on the outer peripheral surface of the handling cylinder 30 . Of course, the handling member 32 is not limited to this, and the handling member 32 may be fixed to the outer peripheral surface of the handling cylinder 30 with a screw or the like. However, when the handling member 32 is attached to the spiral blade 90 by engaging the reinforcing ribs 35, it is preferable because it is less likely to bend and deform due to the load associated with threshing the corn. In addition, the positioning when attaching the handling member 32 is facilitated. Further, by attaching the shaving members 32 instead of the shaving teeth 31, it becomes easy to evenly dispose the shaving members 32 without causing uneven weight distribution on the squeezing cylinder 30.例文帳に追加A detailed configuration of the handling member 32 will be described later (see FIGS. 7(a) and 7(b)).

In the present embodiment, the handling member 32 is attached to the spiral blade 90 in the vicinity of the reinforcing rib 35 that engages the reinforcing rib 35. It may be possible to attach without engaging the reinforcing ribs 35 .

Next, the receiving network 50 will be explained using FIGS. 4 to 6 while referring to FIG. As shown in FIG. 4, the receiving net 50 is formed in an arc shape along the outer peripheral surface of the lower portion of the handling cylinder 30 when viewed from the front (in the direction of the rotation axis of the handling cylinder 30).

As shown in FIG. 5 , the receiving net 50 is a lattice net formed of a plurality of vertical beams 51 and 52 , a plurality of horizontal bars 53 and a frame 54 . The horizontal bar 53 is formed of a round bar member extending along the direction of the rotation axis of the handling cylinder 30 , and a plurality of horizontal bars 53 are arranged side by side in the circumferential direction of the handling cylinder 30 . The vertical beams 51 and 52 are made of arc-shaped plate members extending in the rotational direction (circumferential direction) of the drum 30, and a plurality of vertical beams 51 and 52 are arranged side by side in the direction of the rotation axis of the drum 30. As shown in FIG.

The plurality of vertical bars 51 and 52 are arranged at predetermined intervals in the rotation axis direction, and are arranged between a plurality of welded vertical bars 51 whose both ends are welded to the frame body 54 and between the adjacent welded vertical bars 51. A plurality of detachable longitudinal beams 52 are included which are detachably attached at both ends to a frame 54 . That is, as shown in FIG. 5, a frame 54, a plurality of welded vertical bars 51 and a plurality of horizontal bars 53 are welded together to form a receiving net 50. A vertical bar 52 is detachably attached. The detachable vertical beam 52 is attached to the frame body 54 with screws 56 at both upper and lower ends of the detachable vertical beam 52 on the back side of the receiving net 50 , that is, on the side opposite to the side facing the handling cylinder 30 .

Although the description is omitted here, the plurality of horizontal rods 53 also include a plurality of welded horizontal rods welded to the frame 54 at both ends in the rotation axis direction, and are arranged between adjacent welded horizontal rods and may include a plurality of detachable crossbars detachably attached to frame 54; In this way, the size of the mesh can be changed, and the receiving net 50 can be adjusted to crops other than corn (e.g., Rice, wheat, soybeans, buckwheat, etc.) can be used even when threshing, which is preferable.

As shown in FIG. 6, the detachable vertical rail 52 is formed with a notch 521 for avoiding interference with the plurality of horizontal bars 53 , and the detachable vertical rail 52 is formed with the plurality of horizontal rods 53 in the notch 521 . are fitted to the frame body 54 . Further, in the case of this embodiment, a reinforcing plate 55 is detachably attached to the detachable vertical beam 52 with screws 56 . The reinforcement plate 55 is formed with a groove portion 55a for sandwiching the horizontal bar 53 with the detachable vertical beam 52 . That is, by attaching the reinforcing plate 55 , the detachable vertical beam 52 is retained by the horizontal rod 53 fitted in the notch 521 . Therefore, the detachable vertical bar 52 cannot be removed from the frame 54 unless the reinforcing plate 55 as well as the screw 56 are removed.

By attaching the reinforcing plate 55 to the removable vertical bar 52 as described above, the rigidity of the removable vertical bar 52 can be improved. That is, when the reinforcing plate 55 is not attached to the detachable vertical beam 52, if the grains remain between the hauling drum 30 and the receiving net 50, the detachable vertical beam 52 may be deformed by the load of the accumulated grains. was there. Therefore, when the reinforcing plate 55 is attached to the detachable vertical beam 52 as in the present embodiment, the rigidity of the detachable vertical beam 52 can be improved. Even if a load is applied to the vertical beam 50, the removable vertical beam 52 is not easily deformed. Further, the reinforcing plate 55 prevents the detachable horizontal bar fitted in the notch 521 of the detachable vertical beam 52 from coming off the notch 521 due to an external force.

As shown in FIG. 6, the reinforcing plate 55 is formed so as to protrude toward the handling cylinder 30 from a curve Y passing through the inner circumference of the detachable vertical beam 52 when viewed from the rotation axis direction of the handling cylinder 30. is preferred. This is advantageous in that the corn is suppressed from being conveyed in the direction of the axis of rotation, and the threshing of the corn by the threshing drum 30 and the receiving net 50 is facilitated. However, the reinforcing plate 55 is desirably formed so that the tip edge portion 550 on the upstream side in the rotational direction (the direction of the arrow X) does not protrude beyond the curve Y toward the handling cylinder 30 side. This is because if the tip edge portion 550 protrudes toward the threshing cylinder 30 side from the curve Y, the grains that are threshed and conveyed in the rotating direction hit the tip edge portion 550, and the grains are chipped or cracked. It is because there is a fear. On the other hand, in the present embodiment, since the front edge portion 550 does not protrude from the curve Y toward the handling cylinder 30 side, even if the grain hits the front edge portion 550, chipping or cracking is less likely to occur.

<First Embodiment>
Next, the handling member 32 will be described using FIGS. 7(a) and 7(b) while referring to FIGS. 3 and 4. FIG. In this embodiment, as described above, mainly for threshing corn, a plurality of threshing members 32 are detachably arranged between adjacent spiral blades 90 on the threshing barrel 30 . It is preferable that the handling members 32 are arranged at predetermined phase angles (for example, every 45°) with respect to the rotation center of the rotating shaft 40 of the handling cylinder 30, for example.

The threshing member 32 has a first threshing part 321 , a second threshing part 322 , and side walls 323 , 324 . The first threshing part 321 and the second threshing part 322 are formed by bending a plate material, and the plate material is held by side wall parts 323 and 324 at both ends in the direction of the rotation axis, so that the threshing member 32 is integrally formed. It is configured. Side wall portions 323 and 324 are provided with attachment holes 326 for attaching the treating member 32 to the spiral blade 90 with screws 300, and cutout portions 325 engageable with the reinforcing ribs 35 described above.

As shown in FIG. 7( a ), the first threshing part 321 rotates in the counter-rotational direction opposite to the rotation direction of the threshing cylinder 30 as it moves away from the outer peripheral surface of the threshing cylinder 30 on the downstream side of the rotation direction (arrow X direction). It is slanted. In the first threshing section 321, the corn is threshed by rotating it together with the threshing drum 30 while being hooked on the receiving net 50.例文帳に追加That is, in the first threshing section 321, the corn is conveyed from the side of the threshing cylinder 30 to the receiving net 50, and is threshed by rotating together with the threshing cylinder 30 while being pressed against the receiving net 50. - 特許庁

On the other hand, the second threshing part 322 is continuous with the first threshing part 321 on the upstream side in the rotational direction, and is formed so as to protrude toward the receiving net 50 from the tip 90a of the spiral blade 90 in the radial direction of the threshing drum 30. there is In the second threshing section 322, the corn conveyed from the first threshing section 321 is sandwiched between the receiving net 50 and moved while being rotated in the counter-rotational direction as the threshing drum 30 rotates. The first threshing unit 321 is configured to thresh the leftover kernels left on the cob without being completely threshed.

The length of the second threshing part 322 in the counter-rotational direction is longer than the thickness of the plate material forming the first threshing part 321 and the second threshing part 322, and longer than the diameter of the cob of corn to be threshed. In this embodiment, the length of the second threshing part 322 in the anti-rotation direction is longer than the gap (S3, see FIG. 4) between the tip 90a of the spiral blade 90 and the receiving net 50 in the radial direction of the threshing drum 30. formed. This secures the time during which the corn is transported while being sandwiched between the second threshing section 322 and the receiving net 50 . The length of the second threshing part 322 is set to, for example, "50 mm".

The gap (S3) between the tip 90a of the spiral blade 90 and the receiving net 50 is, as shown in FIG. It is longer (S1<S2<S3) than the gap (S2, for example, 22 mm) between the second threshing section 322 and the receiving net 50, and is set to, for example, "28 mm." On the other hand, the gap (S2) between the second threshing part 322 and the receiving net 50 is set to be approximately the same as the diameter of the corncob to be threshed or slightly narrower (for example, narrower by about 1 to 3 mm). be done.

As described above, in this embodiment, the threshing members 32 are arranged between the adjacent spiral blades 90, the corn is hooked to the first threshing part 321 of the threshing member 32, and the corn is caught on the receiving net 50. It is moved according to the rotation of the handling cylinder 30 while being pressed. According to this, the corn before threshing can be surely guided to the threshing member 32 by the spiral blade 90, and the corn is pressed against the receiving net 50 by the threshing member 32, so that the threshing performance is excellent. Therefore, many grains are threshed from the cob. Then, the corn from which many grains have been threshed by the first threshing section 321 is conveyed from the first threshing section 321 to the second threshing section 322 and sandwiched between the second threshing section 322 and the receiving net 50. is moved as the handling cylinder 30 rotates. The length of the second threshing part 322 in the counter-rotational direction is longer than the thickness of the plate material forming the first threshing part 321 and the second threshing part 322, and longer than the diameter of the cob of corn to be threshed. Also, the gap (S2) between the second threshing part 322 and the receiving net 50 is set to be approximately equal to or slightly narrower than the diameter of the cob of corn. Therefore, when the corn is moved in a state sandwiched between the second threshing part 322 and the receiving net 50, the corn can be reliably pressed against the receiving net 50, thereby removing the grains from the cobs that are left uncut. You will be able to thresh. In this way, even with crops such as corn, which have hard, thick cobs, less waste can be achieved.

<Second embodiment>
In the above-described embodiment, the corn is conveyed while being sandwiched between the second threshing section 322 and the receiving net 50. It is transported in a state where it is weakly sandwiched between Therefore, it can be discharged with more leftovers than standard corn. Therefore, it is desirable to be able to thresh even smaller than standard corn with as little unhandled material as possible. The handling members 32A to 32H of the second embodiment for realizing this will be described below with reference to FIGS. 3 and 4 and FIGS. 8(a) to 9(d).

In the case of the threshing member 32A shown in FIGS. 8(a) and 8(b), the second threshing part 322 has a space (S2 , FIG. 4) is formed to protrude from the top surface 327 toward the receiving net side, and has a round bar member 330 as a projecting portion for pressing the corn against the receiving net 50 . The threshing member 32A is obtained by integrally forming one round bar member 330 on the upper surface of the second threshing part 322 by welding to the threshing member 32 of the first embodiment described above. The round bar member 330 extends in a direction intersecting the rotation direction of the threshing cylinder 30 at substantially the center of the second threshing section 322 in the rotation direction (arrow X direction) of the threshing cylinder 30 . By welding the round bar member 330 to the upper surface of the second threshing part 322, the diameter of the round bar member 330 (for example, 1 to 3 mm), which is not welded with the round bar member 330. The gap (S2, see FIG. 4) with the second threshing section 322 can be narrowed compared to the case.

In this handling member 32A, notch portions 325 formed in the side wall portions 323 and 324 are formed so that at least portions thereof do not overlap when viewed from the side. Therefore, the wiping member 32A is mounted between adjacent spiral blades 90 at a predetermined angle with respect to the axis of rotation of the wiping cylinder 30. As shown in FIG. As a result, the round bar member 330 also forms a predetermined angle with respect to the rotation axis of the handling cylinder 30 . In addition, as for the round bar member 330, multiple may be welded in parallel like 32 C of handling members shown in FIG.8(e).

As shown in FIGS. 8(c) and 8(d), the threshing member 32B is formed by welding a single round bar member 330 to the upper surface of the second threshing part 322 in the same manner as the threshing member 32A described above. It is integrally formed, but differs in that the round bar member 330 extends obliquely in the second threshing section 322 when viewed from above. In this handling member 32B as well, the cutouts 325 formed in the side walls 323 and 324 are formed so that at least a portion thereof does not overlap when viewed from the side, so that the handling cylinder 32B is positioned between the spiral blades 90. It is mounted at a predetermined angle with respect to the axis of rotation of 30 . In that case, the round bar member 330 is obliquely formed in the second threshing section 322 so as to be parallel to the rotation axis of the threshing cylinder 30 .

In addition, like the handling member 32C shown in FIG. 8(e), a plurality (three in this case) of the above-described round bar members 330 may be integrally formed on the upper surface of the second threshing part 322 by welding. . Moreover, like a threshing member 32D shown in FIG. 8(f), a plurality of (here, three) round bar members 330 may extend in the rotation direction of the threshing cylinder 30 in the second threshing section 322. .

In the above-described threshing members 32A to 32D, the gap (S2, see FIG. 4) with the receiving net 50 is narrowed by the round bar member 330 in the second threshing section 322. Even corn is conveyed while being pressed against the receiving net 50 by the round bar member 330 and tightly sandwiched. This allows even smaller than standard corn to be threshed with less leftovers. Moreover, such a handling member 32A is a replacement part capable of forming an optimum gap (S2) according to the type of corn by simply welding a round bar member 330 to the handling member 32 shown in FIG. 7(b). It is preferable because it is possible to form a treating member as

By the way, in order to narrow the gap (S2, see FIG. 4) with the receiving net 50 in the second threshing part 322, welding the round bar member 330 to the second threshing part 322 is not limited as described above. If the distance (S2, see FIG. 4) from the receiving net 50 can be narrowed and the corn can be guided to be pressed against the receiving net 50, the above-described round bar member 330 may not be used. An embodiment for such a case is shown in FIGS. 9(a) to 9(d).

The threshing member 32E shown in FIG. 9(a) is arranged such that the second threshing part 322 protrudes toward the receiving net 50 from the upstream side or the downstream side at substantially the center in the rotation direction (arrow X direction) of the threshing drum 30. It is formed in a curved shape (that is, so that the gap with the receiving net 50 is narrowed).

The threshing member 32F shown in FIG. 9(b) is a protruding part so that the downstream side of the second threshing part 322 protrudes from the top surface 327 toward the receiving net 50 in the rotation direction (arrow X direction) of the threshing drum 30. A projecting member 360 is provided as a function.

The threshing member 32G shown in FIG. 9(c) is a protruding part so that the upstream side of the second threshing part 322 protrudes from the top surface 327 toward the receiving net 50 in the rotation direction (arrow X direction) of the threshing drum 30. A projecting member 370 is provided as a function. In this case, for example, in one plate member, the upstream side of the second threshing part 322 may be bent so as to protrude from the top surface 327 to the receiving net 50 side, and the projecting member 370 does not need to be welded. Therefore, it is easier to form than others.

The threshing member 32H shown in FIG. 9(d) has a protruding member 380 having a triangular cross section as a protruding portion substantially in the center of the second threshing section 322 in the rotation direction (arrow X direction) of the threshing drum 30. It is. In this case, for example, the center of the second threshing part 322 may be bent so as to protrude from the top surface 327 toward the receiving net 50 in one plate member.

As described above, by narrowing the gap between the second threshing section 322 and the receiving net 50, even corn smaller than the standard size can be threshed with less unhandled corn.

3...Threshing device 30...Treatment cylinder 32...Treatment member 35...Reinforcement rib (reinforcement member)
50... Receiving net 90... Spiral vane (blade)
90a... tip of blade 300... screw (fixing member)
321... First threshing part 322... Second threshing part 325... Notch 327... Top surface 330... Round bar member (projection)
360, 370, 380... projecting member (projection)

Claims (5)

A threshing apparatus having a cylindrical threshing drum and receiving nets arranged at intervals along the outer peripheral surface of the threshing drum, and threshing while conveying crops according to the rotation of the threshing drum. ,
The handling barrel is
a helical blade formed on the outer peripheral surface;
a wiping member disposed between the blades adjacent to each other in the rotation axis direction of the wiping cylinder;
The handling member comprises:
The first threshing is formed so as to extend in the anti-rotational direction opposite to the rotational direction of the threshing cylinder as the distance from the outer peripheral surface of the threshing cylinder increases, and the crops are pressed against the receiving net and threshed as the threshing cylinder rotates. Department and
It is formed so as to be continuous with the first threshing section on the upstream side in the rotational direction and protrude toward the receiving net side from the tip of the blade in the radial direction of the threshing cylinder, and as the threshing cylinder rotates. a second threshing section that thresh the crops conveyed from the first threshing section with the receiving net sandwiched therebetween;
A threshing device characterized by: The second threshing part has a length in the counter-rotational direction longer than the gap between the tip of the blade and the receiving net in the radial direction,
The threshing device according to claim 1, characterized in that: The second threshing part has a top surface that extends linearly along the counter-rotation direction, and a protruding part that protrudes from the top surface toward the receiving net so as to press the crop against the receiving net.
The threshing device according to claim 1 or 2, characterized in that: The treating member is fixed to the outer peripheral surface of the treating cylinder between the blades that are adjacent in the direction of the rotation axis.
The threshing device according to any one of claims 1 to 3, characterized in that: The handling cylinder has a reinforcing member that protrudes in the radial direction from the outer peripheral surface of the handling cylinder between the blades that are adjacent in the rotation axis direction and that connects and reinforces the adjacent blades,
The treating member has a notch engageable with the reinforcing member and is fixed to the blade while engaging the reinforcing member through the notch.
The threshing device according to any one of claims 1 to 3, characterized in that:

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