JP2002095339A - Waste straw treatment device for reaping harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waste straw treatment device for a reaping harvester, having miniaturized and simplified covering structures with the waste straw shredding structure and simplifying the switching operation between the waste straw shredding treatment and long straw releasing treatment. SOLUTION: This waste straw treatment device has such a construction that a changeover element 4 is provided so as to be switchable between a waste straw releasing posture with which waste straw fed to the straw inlet 8 of a cylinder cutter F arranged below the conveyance terminal end of a threshing feed chain 2 is caught and releasingly guided backward of the machine body and a releasing posture with which a waste straw feed to the straw inlet 8 is allowed, an upper cover 3 covering the upper side of the straw inlet 8 in a state of including the conveyance terminal end of the threshing feed chain 2 is provided so as to be switchable to released posture moved upward and is furnished with a waste straw guide rod 5 functioning to move and guide waste straw fed from the conveyance terminal end of the threshing feed chain 2 into the rake-in action area of the cylinder cutter F in such a mode as to come to a non-guiding posture when the upper cover 3 is in a released posture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste straw processing apparatus for a reaper and harvester, wherein a cylinder cutter for shredding waste straw after threshing is disposed at a position below a conveying end of a threshing food chain. About.

[0002]

2. Description of the Related Art A cylinder cutter provided in a waste straw processing device of this type of reaper and harvester cuts waste straw sent from a threshing hood chain in a state of being folded into two, so that the waste straw is cut off. Compared to a disk-type cutter that simultaneously shreds multiple parts of its entire length in a horizontal position, the waste stirrer processing device including the waste stirrer transport system can be made more compact, but equipped with such a cylinder cutter In doing so, it is necessary to ensure that the waste stirrer sent out from the threshing hood chain can be reliably fed into the squeezing action area of the cylinder cutter while ensuring safety for the cutter, and that a heavy cylinder cutter is used. It is demanded that the straw can be collected without removing it for a long time. Conventionally, an upper cover that covers the upper portion of the straw introduction port of the cylinder cutter is provided in a fixed state including the transfer end portion of the threshing hood chain, and the upper cover is provided inside the straw introduction port of the cylinder cutter. It receives the supplied straw and delivers it to the rear of the aircraft through the straw outlet formed on the rear panel of the upper cover, and the open posture that allows the supply of the straw to the straw inlet. A switching member that can be freely switched is provided, and when the switching member is switched to the open position, the switching member closes the straw outlet of the upper cover, and further, threshing is provided in the upper cover. A feeding guide posture for feeding and guiding a waste stirrer delivered from the transport terminal end of the hood chain into the squeezing action area of the cylinder cutter; The freely discharge Waragaido rod switch swings and non guiding position that is disengaged from the transfer terminal end of the chain is provided, it has been provided an operation device for operating switching the exhaust Waragaido rod of the upper cover from the outside.

[0003]

The opening width of the stirrer inlet of the cylinder cutter is set to be equal to the entire length of the stirrer because the stirrer sent from the threshing hood chain is shredded in a folded state. Since it can be configured to be significantly smaller than that, the width of the switching member can be configured to be smaller accordingly. However, since the upper cover is provided in a fixed state, the upper cover receives discharge straw supplied to the straw introduction port of the cylinder cutter, and guides the discharge to the rear of the machine through the straw discharge port formed in the rear plate of the upper cover. In this case, the width of the upper cover itself must be larger than the entire length of the straw, and other parts, such as rubber dripping, on the part of the straw cover that cannot be closed by the switching member that is in the open position. It is necessary to provide the closing member described above, and the cover structure is increased in size and complexity, which tends to increase the manufacturing cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and its main problem is to simplify the operation for switching to a waste straw shredding process or a long straw release process operation. An object of the present invention is to provide a waste straw processing device of a reaper that can reduce the size and simplification of a cover structure related to waste straw shredding.

[0005]

According to a first aspect of the present invention, there is provided a waste straw processing apparatus for a reaper harvester, wherein a waste straw after threshing is shredded at a position below a conveying end of a threshing hood chain. Arrange a cylinder cutter to be processed, receive the waste stirrer supplied to the stirrer inlet of this cylinder cutter, and discharge the stirrer to guide the discharge to the rear of the machine, and open to allow the supply of the stirrer to the stirrer inlet In addition to providing a switching member that can be freely switched between the attitude and the attitude, the upper cover that covers the upper part of the straw introduction port of the cylinder cutter in a state including the transport end part of the threshing hood chain is switched to the open attitude in which the upper cover is moved upward. The upper cover is provided freely, and the upper cover is provided with a discharge washer for moving and guiding a discharge stirrer delivered from a conveying end portion of the threshing hood chain into a rake-in operation area of the cylinder cutter. The guide lever is provided, when the upper cover is in the open position, lies in the exhaust Waragaido rod is configured to be non-guiding position spaced from the transfer terminal end portion of the threshing food chain.

[Operation] According to the above-mentioned characteristic configuration, when shredding the waste straw, the upper cover is set to the closed posture, the waste straw guide rod is set to the movement guide posture, and the switching member is set to the open posture. Thereby, while ensuring safety for the cylinder cutter, the waste stirrer sent out from the transport terminal end of the threshing hood chain can be reliably and smoothly moved and guided into the scraping action area through the stirrer introduction port of the cylinder cutter. . In addition, in the case of discharging the straw as long culm, the switching member is switched to the open position in which the upper cover is moved upward, and the non-guided position in which the discharge straw guide rod is separated from the transport end of the threshing hood chain. Are switched to the discharge stirrer discharge posture, respectively, so that the discharge stirrer sent out from the transport terminal end of the threshing hood chain is received by the switching member in the discharge stirrer discharge position, and this is revealed by the upward movement of the upper cover. Discharge guide to the rear of the fuselage through the opening. Furthermore, since the discharge straw guide rod is provided on the upper cover, and with the switching operation of the upper cover to the open position, the discharge straw guide rod is switched to the non-guided position separated from the transport end of the threshing hood chain, A special switching operation for the discharge straw guide rod is not required.

[Effect] Accordingly, during the long straw discharging operation, the opening that appears by the upward movement of the upper cover is used as the long straw discharging passage. Because there is no need to form a straw outlet on the rear side plate of the upper cover, a portion of the straw outlet that cannot be closed with the switching member in the open position as in the related art is not limited. It is not necessary to provide another closing member such as rubber dripping, and the cover structure related to the shredder processing can be made compact and simple. Further, although the vertical operation of the upper cover is newly added, since the exhaust straw guide rod can be switched using the vertical operation of the upper cover, it is possible to switch to the exhaust straw shredding process or the long straw release process operation. Operation can be simplified.

According to a second aspect of the present invention, there is provided a waste straw processing device for a reaper, wherein a base portion of the waste straw guide rod is spirally bent. [Operation] According to the above-mentioned characteristic configuration, the volume of the waste straw sent out from the transport end of the threshing hood chain by utilizing the torsion elastic force of the spiral portion formed at the base end side of the waste straw guide rod. The change can be smoothly followed. [Effects] Therefore, it is possible to improve the follow-up performance with respect to the volume change of the exhaust straw and to improve the durability with a simple and economical modification in which the proximal end portion of the exhaust straw guide rod is formed by spirally bending. it can.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIGS.
Fig. 3 shows a double-row mowing lightweight combine which is an example of a reaper and harvester, which raises and cuts two rows of planted grain culms in front of a body B equipped with a pair of right and left crawler traveling devices A and rearward. A cutting section C for vertically transporting upward, and a control tower D1
And a control unit D having a driver seat D2 are disposed in the left-right direction, and a central portion of the fuselage B in the front-rear direction is used to handle the cut grain culm sent from the vertical transport device 1 of the cutting unit C. Threshing feed chain 2 for pinching and conveying along
A threshing device E configured to sort the threshed grains while transferring the threshed grains along the left-right direction of the machine body is further provided. An example of a waste straw cutter that shreds the throat-exhausted straw that is sent from the factory, and a cylinder cutter F that shreds the waste straw in a state of being folded in two.
And a paddy processing unit G that packs the first grain that has been threshed by the threshing apparatus E is disposed on the left and right.

As shown in FIGS. 3 and 4, an upper portion of a straw introduction port 8 of the cylinder cutter F is provided on an upper portion of a casing 7 of the cylinder cutter F in a state including a transfer end portion of the threshing hood chain 2. Cover 3 is disposed so as to be vertically swingable around a horizontal axis P in the left-right direction located at the upper rear end of the threshing device E, and the upper cover 3 is moved upward in an open position. When you switch to
Between the lower end of the upper cover 3 and the upper surface of the top plate 7a of the casing 7, the waste straw sent from the transport end of the threshing hood chain 2 in a horizontal position or a horizontal position close to it in the left-right direction remains as a long culm. It is configured so that a discharge straw discharge passage for guiding discharge to the rear of the fuselage appears.

The rear end of the top plate 7a of the casing 7 surrounded by the upper cover 3 receives the exhaust stirrer supplied to the cylinder cutter F in a state where the stirrer inlet 8 of the cylinder cutter F is closed. It is operable to switch between a discharge straw discharging posture for guiding the discharge rearward and an opening posture for allowing supply of the discharge straw to the straw introduction port 8 and is formed on the rear side plate 3a of the upper cover 3 when in the opening posture. A cover-like switching member 4 capable of closing the opened opening 3b is provided. Further, the upper cover 3 is provided with a straw introduction port of a cylinder cutter F for discharging a waste straw sent out from a transport end of the threshing hood chain 2. An exhaust straw guide rod 5 is provided for guiding the movement of the thruster hood chain 2 when the upper cover 3 is switched to the open position. It is configured to be a non-guiding position spaced from the feed terminal end.

[0012] The threshing feed chain 2 comprises a holding and conveying chain 2 arranged along the lower side of the opening of the threshing device E.
A, a plurality of holding rails 2B opposed to the upper holding / conveying portion of the holding / conveying chain 2A, and each holding rail 2B is moved within a certain range in the vertical direction with respect to the mounting frame 6 provided in the threshing device E. Support rod 2C that supports freely
And a compression coil spring 2D mounted on the support rod 2C in such a manner that the respective holding rails 2B are moved and biased toward the upper holding / conveying portion side of the holding / conveying chain 2A.

As shown in FIGS. 3 to 6, the cylinder cutter F is provided inside a casing 7 disposed below the conveying end of the threshing feed chain 2.
A first raking drum 10 provided with a raking rod 9 for raking down a discharging stirrer fed in a substantially horizontal posture or a lateral posture close thereto through a discharging stirrer inlet 8 formed in a top plate 7a of The rake rod 9 of the first rake drum 10
A second raking drum 11 having a circumferential groove 11a and a number of raking protrusions 11b for folding the waste straw into two;
Two (or one or three or more) blade bodies 12a
Rotary cutting tool 12 provided with
2a and a fixed blade 18 for shredding the waste straw folded in half by 2a.

As shown in FIGS. 5 and 6, the second
The rotation shaft 11A of the raking drum 11 is moved to the first raking drum 1
A swing arm 13 is provided for swingably supporting within a range of an elongated hole 7c formed in the side plate 7b of the casing 7 along the perspective direction with respect to 0. The swing arm 13 and the side plate 7b of the casing 7 are provided. A coil spring 19 for urging the second raking drum 11 toward the side closer to the first raking drum 10 is provided therebetween, and the upper surface of the top plate 7a of the casing 7 is provided with a threshing feeder. The discharge straw sent from the transport end of the chain 2 is formed as a long straw on a downwardly inclined surface which can be discharged and guided in a downward sliding state toward the rear of the machine body.

As shown in FIGS. 5 and 6, a rotary shaft 12A of a rotary cutting tool 12 serving as an input portion of the cylinder cutter F is provided.
Sprocket 15A provided integrally with the first sprocket
A second sprocket 15B provided on the rotating shaft 10A of the first scraping drum 10 in an integrally rotating state, a third sprocket 15C provided on the swinging fulcrum shaft 13A of the swinging arm 13 in a free rotating state, A fourth shaft provided in a free rotation state with respect to a support shaft 15D fixed to the side plate 7b of the casing 7
The first transmission chain 15 extends over the sprocket 15E.
F, a passive gear 15H meshing with a gear portion 15G integrally formed with the third sprocket 15C is provided on the rotating shaft 11A of the second raking drum 11 in an integrally rotating state. Rotary shaft 10 of scraping drum 10
A fifth sprocket 15J provided integrally with A
And a rotary output shaft 15 serving as an output unit of the cylinder cutter F.
Sixth sprocket 15L provided integrally with K
The first power transmission mechanism 15 is configured to wind the second power transmission chain 15M between them and drive the respective components of the cylinder cutter F in an interlocked manner without slippage.

As shown in FIGS. 3, 4 and 6, among the constituent members of the threshing apparatus E, a rotary cutting tool is mounted on a rotary shaft 14A of a karino 14 which generates a sorting wind along the lateral direction of the body. A second power transmission mechanism 16 for transmitting power to the rotary shaft 12A of the motor 12 is provided, and power is supplied from the rotary output shaft 15K to the input shaft 2E on the transport end side serving as an input portion of the threshing feed chain 2 without slipping. A third power transmission mechanism 17 for transmitting the threshing is provided, and the threshing feed chain 2 is driven from the Karin 14 of the threshing device E via the cylinder cutter F.

The second power transmission mechanism 16 includes a transmission case 16A fixed to the side plate 7b of the casing 7 and a longitudinal direction of the body interlocked with a rotation shaft 12A of the rotary cutting tool 12 via a pair of bevel gears 16B. Transmission shaft 16 along
C, and a transmission belt 16F extending between a drive pulley 16D fixed to the rotating shaft 14A of the car 14 and a driven pulley 16E fixed to the rotary transmission shaft 16C.
, And a tension pulley 16G for the transmission belt 16F is provided.

The third power transmission mechanism 17 is connected to the input shaft 2E located at the transport end of the threshing feed chain 2.
In addition, a sprocket 2F for winding the conveying end portion of the holding conveying chain 2A and an input sprocket 17A are provided in an integrally rotating state.
A transmission chain 17C is wound around 7A and an output sprocket 17B provided integrally with the intermediate portion of a rotary output shaft 15K opposed thereto.

Then, as described above, the cylinder cutter F
When the threshing hood chain 2 is driven via the cylinder cutter F, for example, when the shredding amount per unit time in the cylinder cutter F increases and the work load temporarily increases, the cylinder cutter F However, at this time, the conveying speed of the threshing hood chain 2 receiving power via the cylinder cutter F also decreases, and thus the supply of waste straw by the threshing hood chain 2 The volume discharge is automatically corrected to a supply amount corresponding to the reduced shredding capacity of the cylinder cutter F.

Therefore, even if the shredding processing capacity per unit time in the cylinder cutter F temporarily decreases, the amount of waste straw supplied corresponding to the processing capacity after the reduction is automatically corrected to cause clogging. Can be efficiently shredded in a state where the thrust is suppressed, and the transmission system can be rationally modified by driving the threshing hood chain 2 via the cylinder cutter F. For example, the work load of the cylinder cutter F can be reduced. As compared with the case where the driving speed of the threshing hood chain 2 is controlled based on the detection, it can be implemented more advantageously in terms of manufacturing cost.

When the threshing hood chain 2 is driven via the cylinder cutter F, the threshing hood chain 2 is provided on the fifth sprocket 15J provided on the rotary shaft 10A of the first scraping drum 10 and the rotary output shaft 15K. The speed is reduced between the sixth sprocket 15L and the input sprocket 17 provided on the input shaft 2E of the threshing feed chain 2.
The speed is reduced between A and an output sprocket 17B provided on the rotary output shaft 15K.

As shown in FIGS. 1 and 2, the upper cover 3 has a main cover 3A formed to open toward the rear of the machine and toward the base of the straw, and a base-side opening edge of the main cover 3A. Side cover 3 pivotally openable and closable
B, and the main cover 3A is shown in FIGS.
As shown in the figure, the mounting member 3C is fixed to a rear bracket of the threshing device E so as to be swingable up and down around a horizontal axis P.

An opening / closing operation lever 21 having a grip portion 21A protruding upward through a through hole formed in the main cover 3A is mounted on a support shaft 20 which is pivotally supported by the mounting base material 3C and extends in the left-right direction. The opening / closing operation lever 21 is engaged with a locking pin 22 provided at the rear end of the mounting frame 6 on the threshing device E side to selectively hold the upper cover 3 at the opening operation position and the closing operation position. A possible operation guide hole 23 is formed and the locking pin 2
2 is provided with a torsion coil spring 24 for oscillatingly urging the opening / closing operation lever 21 in a direction in which the opening / closing operation lever 21 is engaged with the locking holes 23a and 23b formed at the opening operation position and the closing operation position of the operation guide hole 23. I have.

Of the discharge straw guide rods 5, bolts 25 are attached to brackets 25 provided on the mounting base 3C of the upper cover 3.
The mounting base 5A fixed with a nut or the like is formed in an oblong shape along the left-right direction when viewed from the rear.
5B is configured so that the mounting position in the left-right direction with respect to the mounting portion can be adjusted within the range of the oblong hole, and a middle portion (proximal portion) 5B connected to the mounting base 5A.
Is formed in a spiral shape (coil shape).
Using the twisting elastic force of B, the guide portion of the exhaust straw guide rod 5 is elastically displaced while smoothly following the volume change of the exhaust straw sent from the transport end of the threshing hood chain 2. It is configured to be able to.

When the upper cover 3 is switched to the open position, the discharge straw guide rod 5 moves integrally with the upper cover 3 rearward and upward from the transport end of the threshing hood chain 2 to move the discharge straw guide rod. The lower end of the rod 5 is changed to the non-guiding posture retracted outside the swing switching area of the switching member 4. That is, the switching member 4 is changed to the non-guidance posture in which the switching swing to the open posture or the discharge straw release posture is permitted.

The switching member 4 rotates in a radially eccentric position with respect to the rotation axis of the first scraping drum 10 as the first scraping drum 10 rotates. Said raking rod 9 configured to enter and exit
The switching member 4 is in a position where the switching member 4 is in a discharging straw releasing position for closing the discharging straw introducing port 8, and the switching member 4 has
A convex passage permitting portion 4a that allows the push-in rod 9 that protrudes outward to pass through is formed to protrude, and the switching member 4 is attached to the mounting base end of the switching member 4. An operation lever 26 for switching to an open position or a discharged stirrer discharging position is fixedly secured. Further, the operation lever 26 is held on the side plate 7b of the casing 7 so as to be freely detachable in an open operation position or a discharged stirrer discharge operation position. A lever holding member for holding is provided.

As shown in FIG. 3, FIG. 4, FIG. 7, and FIG. 8, a portion of the switching member 4 closer to the tip end than the mounting portion of the operation lever 26 is sent out from the transport terminal end of the threshing hood chain 2. When the incoming waste stirrer is caught in the chain return path side and pushed into the gap between the switching member 4 in the discharge stirrer discharge position and the transport end of the threshing hood chain 2, the pushing force at that time causes a downward movement. In the specific position corresponding to the elastically displaceable portion of the switching member 4, the winding of the waste straw at the transport end of the threshing hood chain 2 is performed. A sensor 28 for detecting with elastic displacement of
At least one example of the control means 30 for stopping the driving of the threshing food chain 2 based on the detection signal of the exhausted straw entrainment detection sensor 28 automatically causes the engine 29 which is the driving source including the threshing food chain 2 to automatically operate. An automatic engine stop device for controlling stop is provided.

In the long straw release processing operation, when a part of the waste straw discharged from the transport terminal end of the threshing food chain 2 is caught in the chain return path by the transporting force of the threshing food chain 2, The automatic engine stop device 30 operates based on the detection signal of the exhaust straw entrainment detection sensor 28 that detects the entrainment of the exhaust straw, and stops all the driving including the threshing hood chain 2, thereby stopping the threshing hood chain 2. It is possible to stop the clogging of the waste straw between the transport end portion and the switching member 4 in the waste straw discharging posture at an initial stage. Therefore, while suppressing the deformation and breakage of the threshing hood chain 2 and the switching member 4 due to the clogging of the waste straw during the long straw release processing operation,
The work to clear the clogging of the waste straw can be performed quickly and easily.

[Other Embodiments] (1) In the above-described first embodiment, the exhaust straw entrainment detection sensor 28 that detects the entrapment of the exhaust straw at the transport end portion of the threshing hood chain 2 is replaced by the exhaust straw Although the detection is performed based on the elastic displacement of the switching member 4 accompanying the entrainment, the detection unit of the exhaust straw entrainment detection sensor 28 faces a through hole or a notch formed in the switching member 4, or ,
It may be arranged at a position deviated from the switching member 4 so as to directly detect a waste stirrer entrained at the transport end of the threshing hood chain 2. In short, any structure may be used as the sensor 28 as long as it can detect the entrapment of the waste straw at the transport end of the threshing food chain 2. (2) In the above-described first embodiment, the threshing hood chain 2 is operated by operating the automatic engine stop device 30 that automatically controls the engine 29 to stop based on the detection signal of the exhaust straw entrainment detection sensor 28. Is configured to stop the driving of the exhaust stirrer entrainment detection sensor 2
An actuator such as a solenoid for automatically disengaging and operating a clutch interposed in the second power transmission mechanism 16 for transmitting power from the output of the threshing device E to the input of the cylinder cutter F based on the detection signal of No. 8 The driving of the cylinder cutter F and the threshing hood chain 2 may be stopped. Further, based on the detection signal of the exhaust stirrer entrainment detection sensor 28, the clutch interposed in the third power transmission mechanism 17 for transmitting power from the output of the cylinder cutter F to the input of the threshing hood chain 2 is automatically activated. An actuator such as a solenoid that performs a cutting operation may be provided so that only the driving of the threshing hood chain 2 is stopped. (3) In the first embodiment described above, the cylinder cutter F
The third power transmission mechanism 17 for transmitting power from the output part of the threshing hood chain 2 to the input part of the threshing hood chain 2 is constituted by a chain transmission mechanism, but is constituted by another transmission mechanism such as a gear transmission mechanism or a timing belt type transmission mechanism. May be implemented. (4) In the above-described first embodiment, the switching operation between the closed position and the open position of the upper cover 3 and the switching operation between the open position and the discharged straw release position of the switching member 4 are performed separately. The switching member 4 is switched to the open position and swings in conjunction with the switching operation of the upper cover 3 to the closed position, and the switching member 4 is moved in conjunction with the switching operation of the upper cover 3 to the open position. You may comprise so that it may switch to a waste straw discharge | release attitude | position and swing.

[Brief description of the drawings]

FIG. 1 is a side view of an entire combine according to a first embodiment of the present invention.

FIG. 2 is a plan view of the entire combine.

FIG. 3 is a cross-sectional side view of a main part at the time of a waste straw shredding operation.

FIG. 4 is a cross-sectional side view of a main part during a long straw discharging operation.

FIG. 5 is an exploded side view showing a drive system of a waste straw processing unit.

FIG. 6 is an exploded rear view showing a drive system of a waste straw processing unit.

FIG. 7 is a perspective view of a main part during a waste straw shredding operation.

FIG. 8 is a perspective view of a main part at the time of long waste straw release processing work.

[Explanation of symbols]

 F Cylinder cutter 2 Threshing feed chain 3 Upper cover 4 Switching member 5 Discharge straw guide rod 5B Base end 8 Discharge straw introduction port

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Nobuyoshi Hatanaka 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture Inside Kubota Sakai Plant (72) Inventor Mitsuru Murata 332 Ryobacho, Sakata City, Yamagata Prefecture Saito Agricultural Machinery Works, Ltd. (72) Inventor Noboru Kishida 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture Inside Kubota Sakai Works, Ltd. (72) Inventor Isamu 64 Ishizu-Kitamachi, Sakai City, Osaka Prefecture F-term in Kubota Sakai Works, Ltd. (Reference) 2B097 AA03 CA06 CC01 JA01 JE01 JL08

Claims (2)

[Claims] 1. A cylinder cutter for shredding waste straw after threshing is disposed at a position below a conveying end of a threshing hood chain, and receives a waste straw supplied to a straw introduction port of the cylinder cutter. A state in which a switching member that can be operated to switch between a discharge straw discharging posture for guiding discharge to the rear of the fuselage and an opening posture for allowing supply of the discharge straw to the straw introduction port is provided, and a transfer end portion of the threshing hood chain is included. The upper cover for covering the upper portion of the straw introduction port of the cylinder cutter is provided so as to be freely operable to be switched to the open position moved upward, and further, the upper cover is sent out from the conveying terminal end of the threshing hood chain. An exhaust straw guide rod is provided to guide the exhaust straw into the squeezing action area of the cylinder cutter, and when the upper cover is in the open position, the exhaust straw guide rod thrusts. A stirrer treatment device for a reaper that is configured to be in a non-guided position separated from a conveyance end portion of a feed chain. 2. The apparatus according to claim 1, wherein a base end portion of the straw outlet guide rod is spirally formed.