JP2009013794A - Combine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily perform the maintenance work of an oil cooler, and to prevent breakage of the oil cooler, damage to a pipe or deterioration of durability. <P>SOLUTION: In this combine, a thresher 3 and a grain bagging hopper 5 are respectively arranged above a travelling device 2, a steering section 7 is provided in front of the hopper 5, an engine 15 is provided under the seat 10 of the steering section 7, a radiator 16 is provided outside of a cooling fan 68 for the engine 15, a frame body 20 is provided outside of the radiator 16, and the oil cooler 21 is provided in the frame body 20. The oil cooler 21 is configured to be outwardly rotatable around a mounting shaft 26 in the lower portion of the frame body 20 through a rigid supporting body 27, and also the oil cooler 21 is so configured that its rotation is regulated by a rotation regulating mechanism K. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a combine.

Conventionally, a configuration in which a radiator is provided outside the engine, an oil cooler is provided on the side of the radiator, and the oil cooler is detachably attached to the radiator is known (Patent Document 1).
Japanese Utility Model Publication No. 62-1114825

Since the oil cooler of the above-mentioned known example is detachably attached to the radiator, the maintenance of the radiator can be performed by removing the oil cooler. is doing.
Therefore, there is a problem that the oil cooler is broken, the pipe is damaged or the durability is lowered during the work.
The present application facilitates the movement of the oil cooler and facilitates the entire maintenance work of the radiator and the oil cooler.

In the present invention, a cutting unit 4 is provided in front of the traveling device 2, a threshing device 3 and a grain bagging hopper 5 are provided above the traveling device 2, and a control unit is provided in front of the grain bagging hopper 5. 7, an engine 15 is provided below the seat 10 of the control unit 7, a radiator 16 is provided outside the cooling fan 68 of the engine 15, and a frame body 20 is provided outside the radiator 16, An oil cooler 21 is provided in the frame 20, and the oil cooler 21 is configured to be pivotable outwardly about a mounting shaft 26 at the lower portion of the frame 20 via a rigid support 27. The cooler 21 is a combine characterized in that the rotation is restricted by the rotation restriction mechanism K. When the engine 15 is started, the fan 68 rotates, sucks outside air, and sucks outside air. Is Through the yl cooler 21 and radiator 16 to cool the cooling water for cooling the oil and the engine 15 for operating hydraulic equipment, blown while cooling the outer periphery of the engine 15.
When the engine cover is opened, the oil cooler 21 is exposed, and when the oil cooler 21 and the frame body 20 are detached from each other, the oil cooler 21 rotates outward about the attachment shaft 26.
Accordingly, both the inner and outer surfaces of the oil cooler 21 and the periphery of the outer surface of the radiator 16 are opened to perform maintenance work.
In the present invention, the rotation restricting mechanism K is provided with a rotation restricting stopper 32 for restricting the rotation of the oil cooler 21 on either the oil cooler 21 or the fixed side, and the oil cooler 21 is fixed to the fixed side. The oil cooler 21 restricts the rotation by the rotation restricting mechanism K. The combine is characterized in that either one of the other is provided with an engaging portion 34 with which the rotation restricting stopper 32 is engaged. Therefore, even if the oil cooler 21 is released from the fixed state with respect to the frame 20, the oil cooler 21 stops at a predetermined position.
Therefore, the maintenance work can be performed without supporting the oil cooler 21 by the operator's hand, thereby facilitating the work.
In the present invention, the oil cooler 21 is fixedly attached to the upper part of the support member 23, and the lower part of the support member 23 is fixed to the horizontal shaft 24 in the front-rear direction. The lower part of the attachment member 25 is attached to the frame body 20 so as to be rotatable outward by the attachment shaft 26, the concave part 33 is formed in the attachment member 25, and the engaging parts 34 are provided on both sides of the concave part 33. The turn restricting stopper 32 is positioned in the recess 33 to constitute the turn restricting mechanism K. When the oil cooler 21 is turned outward, the support member 23 and The attachment member 25 integrally rotates outwardly about the attachment shaft 26, and the engagement portion 34 inside the recess 33 abuts on the rotation restricting stopper 32 in the recess 33 of the attachment member 25, so that the oil cooler 21 rotates outward. Restrict movement.

In the invention of claim 1, since the radiator 16 is provided outside the cooling fan 68 of the engine 15 and the oil cooler 21 is provided outside the radiator 16, the oil cooler 21 can be arranged using the space effectively. The overall length of the combine can be shortened, and the oil cooler 21 is rotatably attached to the outside, so that the maintenance of the oil cooler 21 and the radiator 16 can be easily performed. Further, since the rotation of the oil cooler 21 is regulated, it is not necessary to perform maintenance work while supporting the oil cooler 21, and the work can be facilitated.
In the invention of claim 2, in addition to the effect of claim 1, the rotation restricting mechanism of the oil cooler 21 can be simply configured and provided at low cost.
In the invention of claim 3, in addition to the effect of claim 2, since the rotation center of the oil cooler 21 is downward, the rotation restriction mechanism K of the oil cooler 21 does not interfere with the maintenance work and is rational. Can be configured.

An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a machine frame, 2 denotes a traveling device provided at a lower position of the machine frame 1, 3 denotes a threshing device provided at an upper position of the machine frame 1, and 4 denotes a threshing device 3. The cutting part provided on the front side of the hopper, 5 is a hopper for filling a grain bag, and 7 is a control part.
Therefore, an engine 15 is provided below the driver seat 10 of the control unit 7. A radiator 16 is provided on the outside (right side) of the engine 15. The radiator 16 is fixedly attached to a vertical frame 17 fixed to the body frame 1. A frame 20 is provided on the outside of the radiator 16. The frame body 20 is formed in a square frame that is substantially the same size as the radiator 16. The frame 20 is formed with a predetermined width on the left and right.
An oil cooler 21 is provided in the frame 20 (FIG. 2). A lower mounting frame 22 is attached to the lower part of the oil cooler 21 (FIG. 6). The upper part of the support member 23 is fixedly attached to the lower mounting frame 22. The support member 23 is formed in a rod shape. The lower part of the support member 23 is fixed to the horizontal axis 24 in the front-rear direction. The upper part of the attachment member 25 is fixed to both the front and rear sides of the horizontal shaft 24. The lower part of the attachment member 25 is attached to the frame body 20 so as to be rotatable outward by an attachment shaft 26.
That is, the oil cooler 21 is rotatably attached to the frame body 20 by a rigid support body 27, and the support body 27 is represented by the lower mounting frame 22, the support member 23, the horizontal shaft 24, and the mounting member 25 as an example. It is composed.

The upper mounting frame 30 of the oil cooler 21 is fixed to the upper portion of the frame body 20 by a fixing member 31 such as a wing nut or a knob bolt.
Therefore, when the fixing member 31 is removed, the oil cooler 21, the support member 23, and the horizontal shaft 24 rotate about the mounting shaft 26, and a large space is formed between the oil cooler 21 and the radiator 16. Maintenance of the radiator 16 as well as 21 can be easily performed.
Reference numeral 32 denotes a rotation restriction stopper (pin) of a rotation restriction mechanism K that restricts the rotation of the oil cooler 21. The rotation restriction stopper (pin) is positioned in the recess 33 provided in the attachment member 25, and the engagement portion 34 of the attachment member 25. To restrict the rotation.
That is, when the engaging portions 34 are provided on both sides of the recess 33 and the oil cooler 21 is rotated outward, the inner engaging portion 34 abuts on the rotation restricting stopper 32 and restricts the outer rotation of the oil cooler 21.

Further, when the oil cooler 21 is turned inward, the outer engaging portion 34 comes into contact with the turn restricting stopper 32 and restricts the inner turn of the oil cooler 21 and prevents the oil cooler 21 from hitting the radiator 16.
Reference numeral 35 denotes a connection hose.
Accordingly, a dustproof net 45 is provided on the outer surface side of the frame 20 (FIG. 2). The dustproof net 45 is formed by stretching a net 47 on a net frame 46. An engagement portion (attachment portion) 48 is provided on the upper portion of the net frame body 46, and the engagement portion 48 is detachably engaged with and attached to the fixed side engagement portion 49 of the frame body 20.
In the embodiment, the engaging portion 48 is formed in a bowl shape opened downward, and is detachably attached to the fixed side engaging portion 49 from above.
Therefore, the dustproof net 45 can be easily attached and detached without using a special tool, and maintenance can be facilitated.

In this case, the inner frame body 20 and the net frame body 46 are configured to be engaged and locked by the engaging portion 48 and the fixed-side engaging portion 49, and a fitting mounting configuration of a so-called fitting groove and rail. Is abolished.
Therefore, the net frame body 46 (dust-proof net 45) can be removed from the frame body 20 if the engaging portion 48 can be removed from the fixed-side engaging portion 49. Further, the dustproof net 45 can be attached and detached without completely opening the engine side cover 55 described later.
Further, the inner frame body 20 and the net frame body 46 are configured to contact each other by “surface contact”. For example, as shown in FIG. 10, the frame body 20 and the net frame body 46 are each configured to form a plate-like flat surface portion 57, and the flat surface portions 57 are in contact with each other without a gap.
For this reason, when the engine side cover 55 is closed, the dust frame 45 has the net frame 46 in close contact with the frame 20 to prevent entry of dust and soot.

  In addition, as shown in FIG. 11, a contact member 58 formed of an elastic member is provided on one of the flat portions 57 of the frame body 20 and the net frame body 46 so that the frame body 20 and the net frame body 46 are brought into contact with each other. You may comprise so that it may contact | adhere through the contact member 58 without gap.

Thus, the engine side cover 55 is provided outside the dust-proof net 45, and the configuration of the engine side cover 55 is arbitrary, but the engine side cover 55 of the embodiment is attached to the vertical frame 17 with a mounting shaft. 60 is attached so as to rotate outward in the vertical axis.
In this case, when the engine side cover 55 is configured to press the net frame 46 of the dustproof net 45 against the frame 20 when closed (FIG. 3), a gap between the dustproof net 45 and the frame 20 is formed. Eliminate the dust-proof effect.
The engine side cover 55 is provided with a dustproof screen 65. Therefore, dust and the like are removed by the dust-proof screen 65, the dust-proof effect of the dust-proof net 45 is increased, clogging is suppressed, and the dust-proof net 45 is easily maintained, so that the wind path to the engine 15 is improved. To do.

Thus, a part or all of the shroud 70 surrounding the upper portion of the fan 68 of the engine 15 extends inward (left side) so as to be positioned above the engine 15 (FIG. 3).
For this reason, the wind flow by the fan 68 is adjusted from turbulent flow to laminar flow to prevent hot air from blowing from the engine side cover 55 to the control unit 7 and to prevent the control unit 7 from getting hot, thereby improving the working environment. To do.
Moreover, the cooling air to the engine 15 flows stably by the shroud 70, and the engine 15 is prevented from overheating.
One end of the shroud 70 is a free end, and the other end is detachably attached to a radiator frame 71 to which the radiator 16 is attached.
In the shroud 70 of FIGS. 5, 12, and 13, the front side portion 72 is formed of an elastic member such as a rubber plate. The front side portion 72 surrounds the front side of the engine 15 from the middle of the top and bottom to the bottom. Therefore, hot air can be prevented from being blown out to the control unit 7. Further, since the front side portion 72 has elasticity, it can be avoided that it becomes an obstacle to maintenance such as inspection / replenishment of the oil of the engine 15, replacement of the belt 73, inspection of the generator 74, etc. without removing it. Reference numeral 75 denotes an oil check gauge.

Therefore, a main air cleaner 80 that cleans the air taken in by the engine 15 is provided above the engine 15. 81 is a connection hose.
A pre-air cleaner 82 is provided on the upper side of the main air cleaner 80. The pre-air cleaner 82 is fixedly attached to the upper portion of the support cylinder 83. The support cylinder 83 is fixed to the first cerealing device 84 for cerealing the grain threshed by the threshing device 3 in the hopper 5 for filling the grain bag through the stay 85.
Since the first cerealing device 84 has a high rigidity in itself, the pre-air cleaner 82 is firmly supported.
Further, the pre-air cleaner 82 is provided so as to protrude upward from the upper surface of the grain bagging hopper 5 so as to inhale clean air.

The machine body frame 1 has a horizontal frame 86 in the left-right direction and a vertical frame 87 in the front-rear direction, and a main beam 88 is provided below the vertical frame 87. A frame foot 89 is provided on the front and rear of the main beam 88, and the wheel frame 90 of the traveling device 2 is attached to the frame foot 89. Reference numeral 91 denotes a wheel pipe support stay provided on the front side of the wheel frame 90.
A cutting upper and lower cylinder stay 92 is provided in a front portion of the left main beam 88 among the left and right main beams 88. A base portion of a cutting upper and lower cylinder 93 that moves the cutting portion 4 up and down is attached to the cutting upper and lower cylinder stay 92.
In this case, since the cutting upper and lower cylinder stays 92 are arranged above the wheel pipe support stays 91, the lower part of the cutting upper and lower cylinder stays 92 can be formed in an open space, and mud traps and ridges by the cutting upper and lower cylinder stays 92 can be formed. Prevent stagnation.
Therefore, the body frame 1 is provided with a carrier 94 on which an operator gets on and performs bagging work and the like. The carrier 94 is rotatably attached to the carrier fulcrum portion 95 provided on the machine body frame 1 by the attachment turning shaft 96 at the inner portions of the front and rear surfaces. A carrier projecting portion 97 is provided in the vicinity of the mounting rotation shaft 96 of the carrier 94.

The carrier overhanging portion 97 is disposed so as to be positioned at substantially the same longitudinal position as the carrier fulcrum portion 95 in the longitudinal direction of the machine body.
That is, the carrier overhanging portion 97 is provided so as to overlap the carrier fulcrum portion 95 in plan view when the carrier 94 is rotated from the substantially horizontal working position to the stowed position, and the carrier 94 is located between the working position and the stowed position. The carrier overhanging portion 97 is in contact with the carrier fulcrum portion 95 to stop the rotation of the carrier 94 when positioned respectively.
Therefore, the carrier overhanging portion 97 can be used as both the stopper mechanism for the working position and the storage position, and the cost can be reduced.
In this case, the carrier overhanging portion 97 is attached to the carrier 94 so that the position thereof can be adjusted, and the position of the carrier overhanging portion 97 with respect to the carrier fulcrum portion 95 can be changed and adjusted.

That is, for example, the carrier overhanging portion 97 can change the mounting position left and right and up and down with a mounting tool 98 such as a bolt, change the position where it contacts the carrier fulcrum portion 95, and raise the tilted state of the working position and the standing position of the storage position. Change and adjust the state angle.
Therefore, it is possible to cope with the manufacturing accuracy of the carrier 94 and the variation in the assembled state by adjustment. Also, readjustment is possible when the carrier 94 falls over at the storage position. In addition, the opening / closing angle of the carrier 94 can be adjusted to improve workability.
The carrier fulcrum portion 95 is attached in contact with the side surface and the lower surface of the horizontal frame 86 of the body frame 1. Therefore, the carrier fulcrum portion 95 firmly supports the carrier 94.
In this case, the upper surface (upper edge) of the carrier fulcrum part 95 is configured not to protrude upward from the upper surface of the horizontal frame 86.

Therefore, the packed grain bag is prevented from being caught by the carrier fulcrum part 95, and the grain bag is prevented from being damaged.
Similarly, the upper surface (upper edge) of the carrier protruding portion 97 is configured not to protrude upward from the upper surface of the carrier 94.
Therefore, the packed grain bag is prevented from being caught by the carrier fulcrum part 95, and the grain bag is prevented from being damaged.

(Operation of Example)
The engine 15 is started, the vehicle travels with the traveling device 2, and the cereals harvested by the harvesting unit 4 during traveling are threshed with the threshing device 3.
When the engine 15 is started, the fan 68 rotates and sucks outside air from the engine side cover 55 and the dust-proof net 45. The sucked outside air passes through the radiator 16 and cools cooling water for cooling the engine 15, It blows through while cooling the outer periphery of the engine 15.
In this case, the dustproof net 45 is provided with an engaging portion 48 at the upper portion of the net frame body 46 and only engages the engaging portion 48 with the fixed side engaging portion 49 of the frame body 20. Even if the cover 55 is not fully opened, the operator can insert the hand as much as the operator's hand can enter, and then the dust-proof net 45 is slightly moved so that the engaging portion 48 is disengaged from the fixed-side engaging portion 49. When moved up, the dustproof net 45 can be removed from the frame body 20 and taken out for maintenance of the dustproof net 45.

That is, since the engaging portion 48 is formed in a saddle shape that opens downward, it engages and holds the lateral movement, but disengages when it moves upward.
Therefore, the dustproof net 45 can be easily attached and detached without using a special tool, and maintenance can be facilitated.
Further, the inner frame body 20 and the net frame body 46 are configured to be engaged and locked by the engaging portion 48 and the fixed-side engaging portion 49, and a fitting mounting configuration such as a so-called fitting groove and rail is provided. Since it is abolished, the mounting configuration can be made inexpensive.

Therefore, the net frame body 46 and the frame body 20 of the dustproof net 45 form plate-like flat portions 57, and the flat portions 57 are in contact with each other without any gaps. When the cover 55 is closed, the net frame body 46 of the dust-proof net 45 is brought into close contact with the frame body 20 to prevent entry of dust and soot and improve the dust-proof effect.
In addition, as shown in FIG. 11, when the contact member 58 formed of an elastic member is provided on one of the flat portions 57 of the frame body 20 and the net frame body 46, the frame body 20 and the net frame body 46 are further layered. This reduces the gap between and improves the dust-proof effect.
Therefore, an engine side cover 55 is provided outside the dust-proof net 45, and the engine side cover 55 is rotatably mounted and configured to press the net frame 46 of the dust-proof net 45 against the frame 20 when closed. Then, the clearance gap between the dustproof net 45 and the frame 20 is eliminated, and the dustproof effect is further improved.

Since the oil cooler 21 is rotatably attached to the radiator 15 by the support 27, the oil cooler 21 rotates outwardly about the attachment shaft 26 integrally with the support 27 when the fixing member 31 is removed. In addition, a wide space around both the oil cooler 21 and the radiator 16 can be formed, so that not only the oil cooler 21 but also the radiator 16 can be easily maintained.
In this case, since the support body 27 is configured to have rigidity capable of supporting the oil cooler 21, the support body 27 supports the oil cooler 21 rotated outward as it is.
Therefore, the oil cooler 21 can be positioned at a predetermined position during the maintenance work, so that inadvertent breakage can be prevented, and the deformation of the connection hose 35 connected to the oil cooler 21 is minimal, and the durability is lowered. I won't let you.

Accordingly, the lower mounting frame 22 is attached to the lower part of the oil cooler 21, and the upper part of the support member 23 is fixedly attached to the lower mounting frame 22, and the lower part of the support member 23 is fixed to the horizontal axis 24 in the front-rear direction. The upper part of the attachment member 25 is fixed to both the front and rear sides of the horizontal shaft 24, the lower part of the attachment member 25 is attached to the frame body 20 so as to be rotatable outward by the attachment shaft 26, and the support body 27 is attached to the lower attachment frame 22. The support member 23, the horizontal shaft 24, and the attachment member 25, can be configured simply, and do not provide resistance to ventilation to the radiator 15.
Further, since the upper mounting frame 30 of the oil cooler 21 is fixed to the upper part of the frame body 20 by a single fixing member 31 such as a wing nut or a knob bolt, when the single fixing member 31 is removed, the oil cooler 21 is removed. Can be rotated outward.
Since the support 27 is provided with the rotation restricting mechanism K, the oil cooler 21 rotated outward is held at the tilt angle as it is by the rotation restricting mechanism K.
Therefore, it becomes unnecessary to hold the oil cooler 21 and the maintenance work of the oil cooler 21 and the radiator 16 is facilitated.

The rotation restricting mechanism K is provided with a rotation restricting stopper 32 for restricting the rotation of the oil cooler 21 on either the oil cooler 21 or the radiator 16 (frame body 20) side, and the oil cooler 21 and the radiator 16 (frame 16). Since the engaging part 34 with which the rotation restricting stopper 32 is engaged is provided on the other side of the body 20), when the oil cooler 21 is turned, the engaging part 34 and the turn restricting stopper are provided. 32 abuts and restricts the rotation of the oil cooler 21.
In the embodiment, a recess 33 is formed in the mounting member 25, engaging portions 34 are provided on both sides of the recess 33, the rotation restricting stopper 32 is positioned in the recess 33, and the rotation restricting stopper 32 is attached to the frame body 20. Since it is fixed, it can be configured simply.
When the oil cooler 21 is rotated outward, the inner engagement portion 34 comes into contact with the rotation restriction stopper 32 and restricts the outer rotation of the oil cooler 21.
Further, when the oil cooler 21 is turned inward, the outer engagement portion 34 comes into contact with the turn restricting stopper 32 to restrict the inner turn of the oil cooler 21, and the oil cooler 21 is impacted against the radiator 16. To prevent.

  In addition, each of the above-described embodiments is illustrated or described individually or mixedly for easy understanding, but these can be combined in various ways, and the expression, configuration, action, etc. Of course, there is a case where a synergistic effect is obtained.

The side view of a combine. The perspective view of an oil cooler vicinity. The rear view of the engine vicinity. The same part enlarged view. The same side view. The side view near an oil cooler. The rear view. The front view of a rotation control stopper. The operation state figure of a rotation control stopper. Sectional drawing of the other Example of a dustproof net. Sectional drawing of the other Example of a dustproof net. The top view near an engine. The side view of the engine vicinity. The front view of the engine vicinity. The side view of the engine vicinity. The side view near an air cleaner. The front view. The side view of a body frame. The front view. FIG. Rear view near the carrier. FIG. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Airframe frame, 2 ... Traveling device, 3 ... Threshing device, 4 ... Cutting part 4, 5 ... Grain bag packing hopper, 7 ... Steering part, 10 ... Seat, 15 ... Engine, 16 ... Radiator, 17 ... Vertical Frame, 20 ... Frame, 21 ... Oil cooler, 22 ... Lower mounting frame, 23 ... Support member, 24 ... Horizontal axis, 25 ... Mounting member, 26 ... Mounting shaft, 30 ... Upper mounting frame, 31 ... Fixing member , 32 ... Rotation restriction stopper, 33 ... Recess, 34 ... Engagement part, 45 ... Dust-proof net, 46 ... Net frame body, 47 ... Net body, 48 ... Engagement part, 49 ... Fixed side engagement part, 55 ... Engine side cover, 57 ... flat part, 58 ... contact member, 60 ... mounting shaft, 65 ... dust screen, 68 ... fan, 70 ... shroud, 71 ... radiator frame, 73 ... belt, 74 ... generator, 82 ... Pre-air cleaner, 83 ... support cylinder, 84 ... one Grain raising device, 85 ... Stay, 86 ... Horizontal frame, 87 ... Vertical frame, 88 ... Main beam, 89 ... Frame foot, 90 ... Rolling frame, 92 ... Crop upper and lower cylinder stay, 93 ... Cow upper and lower cylinder, 91 ... Foil Pipe support stay, 94 ... carrier, 95 ... carrier fulcrum, 96 ... rotation shaft, 97 ... carrier overhang, 98 ... fixture.

Claims (3)

A cutting part (4) is provided in front of the traveling device (2), and a threshing device (3) and a grain bagging hopper (5) are provided above the traveling device (2), respectively. A steering part (7) is provided on the front side of (5), an engine (15) is provided below the seat (10) of the steering part (7), and the outside of the cooling fan (68) of the engine (15). Is provided with a radiator (16), a frame (20) is provided outside the radiator (16), an oil cooler (21) is provided in the frame (20), and the oil cooler (21) is rigid. The oil cooler (21) is configured to be pivotable outwardly about the attachment shaft (26) center of the lower portion of the frame (20) via a support body (27) having a rotating body. ), Which is configured to restrict rotation. In Claim 1, the said rotation control mechanism (K) provides the rotation control stopper (32) which controls rotation of the said oil cooler (21) in any one of an oil cooler (21) and a fixed side. The combine characterized by comprising the engaging part (34) with which a rotation control stopper (32) engages either the oil cooler (21) or the fixed side. 3. The oil cooler (21) according to claim 2, wherein the oil cooler (21) is fixedly attached to an upper part of a support member (23), and a lower part of the support member (23) is fixed to a horizontal axis (24) in the front-rear direction. The upper part of the attachment member (25) is fixed to both front and rear sides of (24), and the lower part of the attachment member (25) is attached to the frame body (20) so as to be rotatable outwardly by the attachment shaft (26). A recess (33) is formed in (25), engaging portions (34) are provided on both sides of the recess (33), and a rotation restricting stopper (32) is positioned in the recess (33) to restrict the rotation. A combine comprising the mechanism (K).

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