JPH09205860A - Threshing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a threshing device with simlified structure which is fitted rotatably with one of a front and a rear side plate forming a threshing chamber, superior in the assembling and disassembling easiness, operability, and maintainabiity, and useful for a combine harvester, etc. SOLUTION: A threshing drum 6 is pivoted between the front and rear plates 38 and 39 forming the threshing chamber 19, and one of the front and rear side plates 38 and 39 is fitted rotatably. It is preferable that fulcrum shaft 44 of the rotatable side plate 38 is provided on the opposite side from a feed chain installation part, front and rear support shafts 45 and 46 which are arranged nearly coaxially are pivoted on the front and rear side plates 38 and 39, and the threshing drum 6 is pivoted on the front and rear support shafts 45 and 46.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a threshing apparatus such as a combine for continuously cutting and threshing grain culms.

[0002]

Conventionally, Japanese Unexamined Patent Publication No. 56-1
As shown in Japanese Patent No. 54917, the handling cylinder is mounted between the front and rear side plates forming the handling chamber, but the handling cylinder is lifted up and down because the upper cover on the upper side of the handling barrel is opened and detached. There is a problem that it is necessary to raise and lower the handling cylinder using a device or the like, and it is not possible to easily improve the workability of assembling and disassembling the handling cylinder.

[0003]

SUMMARY OF THE INVENTION However, the present invention is a threshing device in which a handling barrel is mounted between front and rear side plates forming a handling chamber, in which one of the front and rear side plates is rotatably attached. By rotating, one of the front and rear surfaces of the handling chamber can be opened, the operator can detach the handling cylinder horizontally at a low position, and the workability of assembling and disassembling the handling cylinder can be easily improved. Even if it is worn, it can be easily replaced, and it is possible to eliminate the problem of erroneously dropping the tightening component into the machine, and to easily confirm the dynamic balance of the handling cylinder after repair.

Further, the fulcrum shaft of the rotatable side plate is provided on the opposite side to the feed chain installation portion, and the fulcrum shaft is arranged without being restricted to the handle for supplying the grain stalks by the feed chain. In addition, it is possible to easily simplify the supporting structure of the rotatable side plate and secure the supporting strength.

Further, the front and rear support shafts arranged on substantially the same axis are pivotally supported by the front and rear side plates, and the handling cylinder is mounted on the front and rear support shafts. It is possible to easily reduce the manufacturing cost and reduce the manufacturing cost, and to open and close the rotatable side plate so that one of the support shafts can be attached to and removed from the handle cylinder. By sliding the handling cylinder, the handling cylinder can be attached to and detached from the spindle of the side plate on the fixed side.

Also, a positioning member is provided at the joint between the support shaft for inputting the driving force and the handling cylinder, and the support shaft and the handling cylinder are provided on the side plate on the fixed side when the handling cylinder is mounted. It can be securely locked by the positioning member, and it is possible to easily simplify the operation of attaching / detaching the handling cylinder to / from the support shaft without the need to tighten the set bolt, etc., and also use the positioning member as a guide when attaching / detaching the handling cylinder. In addition, for example, the rotational force of the support shaft is made to act as the thrust force of the handling cylinder by the guide of the positioning member, so that the handling cylinder can be easily fitted and removed and the operability can be improved.

In addition, the wheel case for preventing the wrapping of straw is integrally fixed to the rotatable side plate, so that the positioning and fixing operation of the wheel case can be omitted when the rotatable side plate is opened and closed. The problem of dropping the tightening member can be eliminated, and the straw chips around the wheel case can be easily removed by opening the rotatable side plate.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. Fig. 1 is an overall side view of the combine, Fig. 2
FIG. 1 is a plan view of the same, in which (1) is a track frame on which the traveling crawler (2) is mounted, (3) is a machine stand installed on the track frame (1), and (4) is a feed chain (5). ) Is stretched to the left and the threshing section having the handling cylinder (6) and the processing cylinder (7) built therein, (8) is a mowing section provided with a cutting blade, a grain culm transport mechanism, and the like, and (9) is the threshing section. (4) A straw processing unit attached to the rear side of the straw chain (10) and the end of the straw tine (11), and (12) including a driver's seat (13) and a driving operation unit (14) A platform, (15) is an engine room in which the engine (16) is installed inside the machine base (3) on the right side, and (17) is located behind the engine room (15) and the threshing section (4 ) Is a grain tank that puts the grain from the
It is configured to perform threshing work.

Further, as shown in FIGS. 3 and 4, (1
9) is a handling chamber in which an axial-flow-type handling barrel (6) axially mounted in the longitudinal direction of the machine body is installed, (20) is a handling port for inserting grain culms into the handling chamber (19), and (21) is The crimp net stretched under the handling chamber (19), and (22) is a rocking sorter which is rockably supported in the front-rear direction via a rocking link (23) and a guide roller (24). The feed pan (25) located below the front part of the crimp net (21) and the chaff sheave (2 located below the rear part of the crimp net (21).
6) and a Glensieve (27) disposed below the chaff sheave (26) are provided on the rocking sorting board (22), and a sieve line (28) is integrated behind the rocking sorting board (22). Which is attached to the above-mentioned handling cylinder (6) and processing cylinder (7)
And the rocking sorter disc (22) to the box-shaped thresher box (2
9) It is arranged inside.

[0010] Further, in the figure, (30) is the sorting board (2).
2) Karatomi which sends the sorting wind in the direction, (31) is the first conveyor to take out the grains to the grain tank (17) through the fried cylinder (18), and (32) is the second conveyor. A second conveyor for returning to the front part of the swing sorting board (22) through a cylinder (33), and (34) is a suction port facing the dust outlet at the rear end of the processing chamber above the sieve line (28). (35) is a suction / exhaust dust fan, in which the grains shredded by the handling cylinder (6) and the processing cylinder (7) are sorted by an oscillating sorting board (22), and only the sized grain is stored in the grain tank ( 17) and at the same time, the straw is sent to the straw processing unit (9) having the straw cutters (36) (37) through the straw chain (10) and the tine (11) to be discharged outside the machine after cutting. Is configured as follows.

Further, the handling cylinder (6) is rotatably mounted between the front and rear side plates (38) (39) forming the handling chamber (19), and the treatment chamber is disposed obliquely to the right behind the handling chamber (19). (4
0) is internally provided with the processing cylinder (7), and the output of the engine (16) is transmitted to the handling cylinder (6) and the processing cylinder (7) through the threshing input pulley (41), and the processing cylinder (6) and the processing cylinder are processed. The cylinder (7) is driven to rotate, and the handling chamber (19) is connected to the front of the processing chamber (40) through the dust inlet (42) on the rear right side, and leaks through the crimp net (21). The threshing dust that has not been sent to the rear of the handling chamber (19) is sent to the treatment chamber (40) and re-thrushing treatment is performed by the treatment drum (7), and the crimp net (which is stretched on the lower surface side of the treatment chamber (40) ( The spilled material from 43) is dropped onto the sorting board (22), and the sewage discharged to the rear of the processing chamber (52) without being leaked by the crimp net (43) is passed through the sieving line (2).
8) It is configured to emit to the upper side.

Further, as shown in FIGS. 5, 6 and 7, the right end of the front side plate (38) is horizontally moved to the threshing machine casing (29) through the hinge-shaped opening / closing fulcrum shafts (44) (44). Rotatably connected to the front plate (38) about the fulcrum shaft (44)
Is rotated forward to open the front side of the handling chamber (19) and the rear side plate (39) is integrally fixed to the threshing machine casing (29). The front and rear side plates (38) (39) support the front and rear support shafts. (4
5) and (46) are provided, and the handling cylinder (6) is attached to the front and rear support shafts (45) and (46).

Further, as shown in FIG. 8, the input case (47) is fixed to the right outer surface of the threshing machine casing (29),
The processing drum input shaft (4) for supporting the threshing input pulley (41) on the case (47) and connecting it to the pulley (41)
8) is internally provided in the case (47), and the front end of the processing cylinder shaft (49) for mounting the processing cylinder (7) is detachably connected to the rear end of the input shaft (48) by spline fitting. The bearing case (50) is fixed to the outer surface of the threshing machine casing (29) above the processing chamber (40), and the sprocket (52) and the pulley (53) for axial support on the coaxial (51) are provided in the bearing case (50). Attached to the front and rear ends, the input shaft (4
8) While connecting the sprocket (52) to the sprocket (54) at the rear end through the chain (55), the pulley (56) of the rear support shaft (46) provided on the fixed rear side board (39). To the pulley (5) via the V-belt (57).
3) is connected, and the rear support shaft (46) is connected via a pulley (59) (60) and a V belt (61) to a sprocket (58) on which the straw chain (10) is stretched. From the middle of the processing cylinder (7) drive train to the engine (1
6) Branch output and handle barrel (6) and straw chain (10)
It is configured to transmit the driving force to.

As is apparent from the above, in the threshing device in which the handling barrel (6) is mounted between the front and rear side plates (38) (39) forming the handling chamber (19), the front side plate (38) is rotatable. Mounted on the front side plate (38) by rotating the handling chamber (19)
The front surface of the threshing unit can be opened so that the worker can remove the handling cylinder (6) horizontally at a low position in front of the threshing unit (4), and it is possible to eliminate the problem that the tightening parts are accidentally dropped into the machine and the thresher A pulley (56) and a V-belt (5), which are driving members for the handling cylinder, are provided on the rear side plate (39) side fixed to the casing (29).
7), the pulley (56) and the V-belt (57) are firmly attached without considering the opening and closing of the rotatable front side plate (38), and the pulley (56) and the V-belt (5) are attached.
The structure for mounting the rotatable front plate (38) is not limited by 7), the dustproof property of the gap of the rotatable front plate (38) mounting portion is improved, and the rotation of the front plate (38) is improved. The dynamic fulcrum shaft (44) portion and the handle body (6) bearing portion are configured to have sufficient strength.

Further, as shown in FIGS. 9 and 10, the front plate (63) of the handle cylinder (6) having a plurality of handle teeth (62) implanted therein.
While fixing the cylindrical boss (64) to the front side plate (3
8) through which a front support shaft (45) is rotatably supported by a bearing bearing (65), and a truncated cone head (67) at the rear end of the front support shaft (45) is bored in the boss (64). The front plate (63) is rotatably supported by the front side plate (38) through the front support shaft (45), and the seat plate (68) is provided on the front support shaft (45). Are brought into contact with the end surface of the boss (64). Further, the front wheel case (69) for preventing the straw from being wound around the front support shaft (45) is integrally fixed to the front side plate (38), and compared with the conventional wheel case independent mounting structure.
Positioning and fixing operations of the wheel case (69) at the time of opening and closing the rotatable side plate (38) can be omitted, and it is possible to eliminate the problem of dropping the wheel case (69) and the tightening member, and to rotate the wheel case (69) freely. Side plate (38)
By opening the door, the straw dust around the foil case (69) can be easily removed.

11 and 12, the cylindrical boss (71) is fixed to the rear face plate (70) of the handling cylinder (6) and the bearing bearing (7) is attached to the rear face plate (39).
The rear support shaft (46) is rotatably supported via 2), and the tip (73) of the front end of the rear support shaft (46) is inserted into the inner hole of the boss (71). A set pin (74) is planted on the shaft (46), and a locking groove (75) into which the set pin (74) is fitted is provided in the boss (71), and the set pin (74) is rotated with a divergent taper opening (76). A slanted groove (77) obliquely provided in the direction is formed in the locking groove (75), and a point (73) is formed.
And the guide of the taper opening (76) facilitate the operation of inserting the rear support shaft (46) into the boss (71) and the operation of inserting the set pin (74) into the locking groove (75). The set pin (74) is held at the end of the inclined groove (77) by the rotational driving force of the rear support shaft (46), and the handling cylinder (6) is integrally connected to the rear support shaft (46). doing. In addition, the rear wheel case (78) for preventing the straw from being wrapped around the rear support shaft (46) is integrally fixed to the rear side plate (39), and the wheel case (78) is supported by the rear side plate (39). The handling cylinder (6) is configured to be attached and detached.

As is apparent from the above, the front and rear support shafts (45) and (46) arranged on substantially the same axis are provided on the front and rear side plates (3).
8) A support shaft that is pivotally supported by (39), and the handling cylinder (6) is supported by the front and rear support shafts (45) (46) to support the handling cylinder (6) as compared with the conventional handling cylinder shaft penetrating structure. By shortening the lengths of (38) and (39), weight reduction and manufacturing cost reduction can be performed, and the front support shaft (45) can be used as the handling cylinder (6) by opening and closing the rotatable front side plate (38). The rear side plate (39) of the fixed side can be detached, and the rear side plate (39) of the fixed side can be slid in the axial direction by the bearing width of the rear support shaft (46). The handle cylinder (6) can be attached to and detached from the shaft (46), and an open / close fulcrum shaft (44) of the rotatable front side plate (38) is provided on the opposite side to the feed chain (5) installation portion. The fulcrum shaft (44) is not limited to the handle (20) for supplying grain culms by the chain (5).
Can be disposed, and the supporting structure of the rotatable front side plate (38) can be simplified and the supporting strength can be easily ensured.

A rear support shaft (46) for inputting a driving force
A set pin (74) which is a detachable positioning member is provided at the joint between the handle and the handling barrel (6), and a rear support shaft (46) is provided on the rear side plate (39) on the fixed side when the handling barrel (6) is mounted. ) And the handle cylinder (6) can be securely locked by the set pin (74), and the tightening operation of the set bolt etc. is unnecessary, and the operation of attaching and removing the handle cylinder (6) to the rear support shaft (46) can be simplified easily. Can be done on the set pin (74)
Can also be used as a guide when the handle cylinder (6) is attached and detached. For example, by guiding the set pin (74), the rotational force of the rear support shaft (46) acts as the thrust force of the handle cylinder (6). ) Can be easily inserted and removed, and the operator holds the front part of the handling cylinder (6) and rotates it in the drive rotation direction, so that the set pin (74) and the locking groove (75) are The sliding action force pushes the handling cylinder (6) forward to release the engagement with the set pin (74), and at the time of threshing work, the shedding force of the handling tooth (62) moves the handling cylinder (6) forward. Acts as a thrust force,
Since the driving torque of the handle cylinder (6) acts as a thrust force for moving the handle cylinder (6) backward by the engagement of the set pin (74) and the inclined groove (77), the forward movement of the handle cylinder (6) is prevented. Thus, it is possible to avoid interference with the front side plate (38).

Further, when the handling cylinder (6) is assembled, the front portion of the rear support shaft (73) is inserted into the boss (71) of the rear plate (70) so that the handling teeth on the lower side of the front portion of the handling cylinder (6). (62) is brought into contact with the upper surface of the crimp net (21), and the front support plate (38) is closed with the rear support shaft (73) supporting the handling cylinder (6) in a cantilevered manner. (45) The truncated conical head (67) at the rear end is inserted into the boss (64) of the front plate (63) in the tilted posture, and the inclined surface of the truncated cone head (67) causes the boss (6) to move.
4) is lifted upward, the truncated cone head (67) is set in the center of the boss (64), and the handling barrel (6) is attached to the front support shaft (45).
Is configured to be pivotally supported. For example, in the small combine for double-row cutting shown in FIG. 1, the handling cylinder (6) has a front-rear width of about 35 cm, a diameter of about 36 cm, and a weight of about 8.5 kg. Therefore, since the crimp net (21) that resists the shedding impact is not deformed by the contact of the handling teeth (62), the operator puts one hand through the handling mouth (20) and handles the handling cylinder (6). It is also possible to support the lower part and open and close the front side plate (38) with the other hand to detach the handling cylinder (6).

Further, as shown in FIGS. 13 and 14, the feed chain (5) is stretched through a chain rail (79) fixed to the outer left side surface of the threshing machine casing (29), and the straw holder is pressed. Spring seat (81) on the base frame (80)
Straw retainer plate (83) that can be moved up and down through the support shaft (82)
And attach the straw retainer plate (83) to the feed chain (5).
The upper surface is elastically contacted by a spring (84) and the feed chain (5) is used to hold and convey the grain stalks. The straw holder frame (80) has front and rear brackets (85) (8).
6) is integrally fixed, and front and rear brackets (85) and (86) are detachably fixed to the left end portions of the front and rear side plates (38) and (39) by bolts (87). Front and rear side plates (38) (3) on (80)
9) can be connected and the rigidity of the machine frame after assembly can be maintained without providing a special connecting member, and the front and rear side plates (3
It is configured such that the dimensions between 8) and (39) can be properly maintained, and a change in the distance between the front and rear side plates (38) and (39) due to reassembly after disassembly can be reduced.

A top cover (88) is provided on the upper side of the handling chamber (19) so as to be freely opened and closed.
8) The right end of the hinged fulcrum shaft (8
9) and the front and rear side plates (38) (3
Hooks (91) and (91) that are locked to 9) via pins (90) and (90), and hooks (91) and (91) are disengaged from the front and rear side plates (38) and (39), and the top cover ( 8
8) A release lever (92) for lifting up is attached to the left side of the top cover (88), and the straw retainer frame (80) is attached.
The upper surface cover (88) is connected to the front and rear side plates (38) and (39) by hooks (91) and (91) at a position different from the connecting portion to improve the mounting rigidity of the front and rear side plates (38) and (39). doing. Then, the release lever (9
2) Raise the top cover (88) by operation and raise the handling room (1
9) Open the upper surface and remove the bolt (87) to release the connection between the straw holder frame (80) and the front side plate (38), and open and close the front side plate (38) to open the internal handling barrel (6). Is to be detached.

Further, FIG. 15, FIG. 16, FIG. 17, and FIG.
Shows a modification of the opening / closing structure of the front and rear side plates (38) (39). As shown in FIG. 15, the opening / closing fulcrum shafts (44) (44) are obliquely provided on the lower right side of the front side plate (38). The front side plate (38) can be opened obliquely downward to the right to open the upper side of the front surface of the handling chamber (19) to a large extent, and as shown in FIG. 16, a parallel link (44a) is attached to the opening / closing fulcrum shaft (44). It is also possible to connect the front side plate (38) and move the front side plate (38) in parallel to the front surface of the child handling cylinder (6) to bring it into contact with and separate from it. Further, as shown in FIG. 17, the upper end of the front side plate (38) can be supported by the opening / closing fulcrum shaft (44) to open the front side plate (38) forward and upward, and as shown in FIG. The handling cylinder drive pulley (56) is provided on the shaft (45),
The rear side plate (39) may be supported by the opening / closing fulcrum shaft (44), the rear side plate (39) may be opened, and the handling cylinder (6) may be attached and detached rearward.

Further, as shown in FIG. 19, the front side plate (3
8) The handle barrel drive pulley (56) is attached to the front support shaft (45) on the front side.
The input shaft (48) of the input case (47) to be coupled to the threshing input pulley (41) is also pivotally supported by the handling cylinder input pulley (56a) and the belt guide (56).
A V-belt (56c) is stretched between the pulleys (56) (56a) via b), and a handling cylinder drive system such as the pulley (56) and the V-belt (56c) is provided on the front side plate (38) side. Then, when the front side plate (38) is opened, the V-belt (56c) is moved by the belt guide (56b) near the fulcrum shaft (44).
Is configured to bend.

Further, as shown in FIGS. 20 and 21, the front plate (6) of the handle cylinder (6) having a plurality of handle teeth (62).
The cylindrical boss (64) is fixed to 3), and the front support shaft (45) is rotatably supported by the front plate (38) via the bearing bearing (65) and slidable in the axial direction. A spring (66) for projecting the front support shaft (45) to move back and forth in the direction of the handling cylinder (6) is wound around the front support shaft (45), and a truncated cone head (at the rear end of the front support shaft (45) ( 67) to the boss (64)
The front plate (63) is rotatably supported by the front side plate (38) through the front support shaft (45), and the seat plate is provided on the front support shaft (45). (68) is brought into contact with the end surface of the boss (64), and the handling cylinder (6) is elastically pressed backward by the spring (66). Thus, the front support shaft (4) provided on the rotatable front side plate (38)
5) When the movable front plate (38) is fixed in the closed position by elastically pressing the movable rear plate (39) toward the fixed rear plate (39), a force for sliding the handling cylinder (6) rearward is applied. The handle cylinder (6) may be made to act, and the handle cylinder (6) may be properly fitted to the rear support shaft (46) of the fixed-side rear plate (39).

[0025]

As is apparent from the above embodiments, according to the present invention, front and rear side plates (38) (39) forming the handling chamber (19).
In a threshing device in which a handling barrel (6) is mounted on a shaft, one of front and rear side plates (38) (39) is rotatably attached, and the front and rear of the handling chamber (19) are rotated by the rotation of the side plates (38). One of the surfaces can be opened, the worker can detach the handle cylinder (6) horizontally at a low position, and the workability of assembling and disassembling the handle cylinder (6) can be easily improved. ) Can be easily replaced even when worn, and it is possible to eliminate the problem that the tightening parts fall into the machine by mistake, and also to easily check the dynamic balance of the handling cylinder (6) after repair. .

Further, the fulcrum shaft (44) of the rotatable side plate (38) is provided on the opposite side to the installation portion of the feed chain (5). Without being restricted to the mouth (20), the fulcrum shaft (4
4) can be arranged, and the support structure of the rotatable side plate (38) can be simplified and the support strength can be easily ensured.

Further, the front and rear support shafts (45) and (46) arranged substantially on the same axis are pivotally supported by the front and rear side plates (38) and (39), and the front and rear support shafts (45) and (46) are provided with a handling cylinder (6). ) Is mounted on a support shaft (45) (4) for supporting the handling cylinder (6).
By reducing the length of 6), the weight and manufacturing cost can be easily reduced, and the side plate (3
One of the support shafts (45) can be attached / detached to / from the handling cylinder (6) by opening / closing operation of 8), and the handling cylinder (6) is axially extended by the bearing width of the fixed side plate (39) and the support shaft (46). By sliding the handle cylinder (6) with respect to the support shaft (46) of the fixed side plate (39).

Further, a positioning member (74) which can be engaged with and disengaged from the joint between the support shaft (46) for inputting the driving force and the handling cylinder (6).
The support shaft (46) provided on the side plate (39) on the fixed side and the handling cylinder (6) can be securely locked by the positioning member (74) when the handling cylinder (6) is mounted, It is possible to easily simplify the attachment / detachment operation of the handling cylinder (6) with respect to the support shaft (46) by eliminating the need for bolt tightening operation, and the positioning member (74) is used for the handling cylinder (6).
It can also be used as a guide at the time of attachment / detachment. For example, the positioning member (74) guides the rotational force of the support shaft (46) to act as the thrust force of the handling cylinder (6), and the fitting and removal operations of the handling cylinder (6) are performed. It is possible to easily improve the property.

In addition, a foil case (6
9) is integrally fixed to the rotatable side plate (38), and the positioning and fixing operation of the wheel case (69) can be omitted when the rotatable side plate (38) is opened and closed.
The problem that the wheel case (69) and the tightening member fall off can be eliminated, and the rotatable side plate (3
By opening 8), the straw dust around the foil case (69) can be easily removed.

[Brief description of drawings]

FIG. 1 is an overall side view of a combine.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of a threshing unit.

FIG. 4 is a plan view of the same.

FIG. 5 is a plan view of a handling room.

FIG. 6 is a front view of the same.

FIG. 7 is a rear view of the same.

FIG. 8 is a threshing drive explanatory diagram.

FIG. 9 is a side view of the front portion of the handling cylinder.

FIG. 10 is an enlarged view of the same.

FIG. 11 is a side view of the rear portion of the handling cylinder.

FIG. 12 is an enlarged view of FIG.

FIG. 13 is a front view of a front side plate.

FIG. 14 is a side view of the feed chain.

FIG. 15 is a front view of a handling room showing a modified example.

FIG. 16 is a plan view of the same.

FIG. 17 is a side view of the same.

FIG. 18 is a side view of the same.

FIG. 19 is a plan view showing a modified example of FIG.

FIG. 20 is a side view showing a modified example of FIG. 9.

FIG. 21 is an enlarged view of the same.

[Explanation of symbols]

 (5) Feed chain (6) Handling barrel (19) Handling room (29) Threshing machine casing (38) Front side plate (39) Rear side plate (44) Opening / closing fulcrum shaft (45) Front supporting shaft (46) Rear supporting shaft ( 69) Front wheel case (74) Set pin (positioning member)

Claims (5)

[Claims] 1. A threshing device in which one of the front and rear side plates is rotatably attached to a threshing device in which a handling cylinder is mounted between the front and rear side plates forming a handling chamber. 2. The threshing device according to claim 1, wherein a fulcrum shaft of a rotatable side plate is provided on the opposite side to the feed chain installation portion. 3. The threshing device according to claim 1, wherein the front and rear support shafts arranged on substantially the same axis are pivotally supported by the front and rear side plates, and the handling cylinder is mounted on the front and rear support shafts. 4. The threshing device according to claim 3, wherein a disengageable positioning member is provided at a joint between the support shaft for inputting the driving force and the handling cylinder. 5. The threshing device according to claim 1, wherein a wheel case for preventing the straw from being wrapped around is integrally fixed to a rotatable side plate.