JP7616256B2 - combine - Google Patents

Description

The present invention relates to a combine harvester.

Conventionally, when a harvesting device that harvests stalks becomes clogged with crop stalks, a configuration is known in which the connection between the lifting device and the transmission cylinder is released and a pair of support arms is extended or rotated to move the harvesting device forward and secure space at the front of the machine body for performing the work of removing the clogged stalks (Patent Document 1).
Furthermore, a configuration has been publicly known in the art in which the lifting device and the transmission cylinder are separated and the lifting device can be rotated clockwise or counterclockwise around the axis of the support arm (Patent Document 2).
In addition, a configuration has been publicly known in the art in which the left-side lifting device can be rotated clockwise around the axis of the support arm to move the left part of the lifting device forward, and the right-side lifting device can be rotated counterclockwise to move the right part of the lifting device forward (Patent Document 3).

JP 2012-29568 A JP 2012-139118 A JP 2013-99301 A

Among the known examples, the harvesting device of Patent Document 1 is configured to move the harvesting device forward by disconnecting the lifting device and the transmission tube and extending or rotating a pair of support arms, thereby securing space at the front of the machine body for removing the clogged stalks.However, after removing the clogged stalks, it is necessary to reconnect the lifting device and the transmission tube, and further, before removing the clog, it is necessary to separate the lifting device and the transmission tube.This creates a problem in that it takes a lot of time and effort to return to harvesting operations after a clog occurs.
Among the above-mentioned known examples, the harvesting device described in Patent Document 2 is configured so that when the lifting device and the transmission tube are separated, the lifting device can be rotated clockwise or counterclockwise around the axis of the support arm. Therefore, the work required to separate and connect the lifting device and the transmission tube is relatively easy compared to Patent Document 1. However, it is not possible to form a large working space in front of the machine body for removing the stalks, and although it is possible to remove clogged stalks, it takes more time than the prior Patent Document 1.
Of the known examples, the harvesting device described in Patent Document 3 is configured so that the left lifting device can be rotated clockwise around the axis of the support arm to move the left part of the lifting device forward, and the right lifting device can be rotated counterclockwise to move the right part of the lifting device forward. Therefore, with the method of Patent Document 3, the work required to separate and connect the lifting device and the transmission tube is relatively easy, but it is not possible to create a large working space in front of the machine body for the work of removing the stalks, and although the work of removing clogged stalks can be performed, it takes more time than the prior Patent Document 1.
The present application aims to facilitate the movement of a lifting device for a harvesting device and to facilitate the formation of a maintenance space for performing maintenance, including removing clogged stalks, in the harvesting device.

In the invention of claim 1, in a combine harvester equipped with a traveling device 2, a lifting device 15 for lifting up crops growing in a field, a reaping mechanism 21 for reaping the crops, and a threshing device 3 for taking over the crops and threshing them to the left rear of the reaping mechanism 21, an opening/closing pivot shaft 23 is provided on the lower side of the lifting device 15 for supporting the upper side of the lifting device 15 so as to be rotatable in the front-rear direction of the machine body, and when the lifting device 15 is rotated to the front side of the machine body around the opening/closing pivot shaft 23, a maintenance space M is secured on the upper side of the lifting device 15 , the lifting device 15 is configured by arranging a plurality of lifting components 16 in the left-right direction, and the lifting components 16A on both the left and right outer sides are configured without pivot mechanisms, and at least one of the lifting components 16 located between the left and right outer sides of the lifting components 16A is provided with an opening/closing pivot shaft on the lower side. 23 is attached to the lifting device 15, and the lifting transmission mechanism D, which transmits driving force to the lifting device 15, is configured so that the input is input from the upper side of the lifting structure 16 and the lifting structure 16B becomes rotatable when the connected state is released. The lifting transmission mechanism D is configured so as to include a horizontal transmission shaft 30 that transmits the driving force in the left-right direction, a vertical transmission shaft 31 that switches the transmission direction vertically from the horizontal transmission shaft 30, and a lifting transmission case 32 that distributes the driving force from the vertical transmission shaft 31 to each lifting structure 16. The vertical transmission shaft 31 is divided into an upper shaft 33 and a lower shaft 34 and is connected via a connecting clutch mechanism 35. When the connecting clutch mechanism 35 is moved to the released position, the vertical transmission shaft 31 is in a divided state, and when the lower shaft 34 is pulled out, the lifting structure 16 is in a non-connected state in which it can rotate .
In the invention of claim 2 , a pull-up speed change lever 36 is provided for switching the working speed of the pull-up device, and when the pull-up speed change lever 36 is operated to neutral to cut off the transmission, the pull-up lug chain 19 of the pull-up structure 16 can be manually operated to rotate the transmission vertical shaft 31, and the connecting clutch mechanism 35 is positioned in a position visible from the space 37 between the upper end of the pull-up structure 16 and the transmission horizontal shaft 30, so that the connected/disconnected state can be visually determined.
In the invention of claim 3 , the opening and closing pivot shaft 23 of the rotating raising structure 16 is attached to the grass dividing frame 12 via a boss 40 and a pin 41, the opening and closing pivot shaft 23 is connected to the lower side of the raising frame 17, and the raising upper side is configured to rotate, the raising cover 42 of the raising device 15 is attached rotatably upward, and a posture maintaining member 43 is provided within the raising cover 42 to hold the raising structure 16 in a front inclined posture, which is a combine harvester as described in claim 1 or claim 2 .
In the invention of claim 4 , a grass dividing rod 11 is arranged at the tip of the grass dividing frame 12, which raises the stalks and separates adjacent stalks, and the upper side of the grass dividing rod 11 is at a height that is located below the raising structure 16 when the raising structure 16 is rotated toward the front of the body, and an extended grass dividing rod 11A that can be rotated in the fore-and-aft direction of the body is attached to the upper side of the grass dividing rod 11, characterized in that the combine harvester is as described in claim 1 or claim 2 .
In the invention of claim 5 , a combine harvester as described in claim 1 or claim 2 is characterized in that, in the part of the rotating raising components 16 where two rows of raising components 16 rotate simultaneously, the upper side of the machine body of a grass dividing guide bar 47 that separates tangled stalks is arranged to protrude toward the front of the machine body, and a rod-shaped grass dividing guide 48 is provided on the upper part of the grass dividing rod 11 for one row located between the left and right sides of the rotating raising components 16 adjacent to the non-rotating raising components 16 at the left and right ends, and the position of the grass dividing guide 48 is closer to the non-rotating raising components 16 at the left and right ends.

In the invention of claim 1, the lifting device 15 is provided on the lower side and is configured to rotate the lifting device 15 to the opening side (front of the machine body) around the opening/closing pivot shaft 23. Therefore, when the lifting device 15 is rotated to the opening side around the opening/closing pivot shaft 23, a maintenance space M can be formed on the upper side of the lifting device 15. When the lifting device 15 is opened, it maintains the open state by its own weight, so the lifting device 15 will not unintentionally return to its original position (close) during maintenance work, ensuring the safety of the work. In addition, since there is no need for a large-scale damper or other posture maintaining member to maintain the open state, the number of parts of the entire harvesting device 4, including the lifting device 15, can be reduced and the structure can be simplified.
In the invention of claim 2, the intermediate lifting component 16B located between the left and right lifting components 16, which is frequently opened during maintenance and clogging removal work, is made rotatable forward, thereby making it possible to reduce the weight (operating load) required for the rotation operation and reducing the labor required by the worker, and the lifting transmission mechanism D, which transmits driving force to each lifting component 16, is detachably connected to the upper side of the lifting components 16, so that the lifting transmission mechanism D also serves as a receiving member for the lifting components 16, preventing the lifting components 16 from rotating forward when the connection is released.
In the invention of claim 3, the connecting clutch mechanism 35, which switches the connecting state of the transmission vertical shaft 31, is made to be a rotation lock mechanism for the raising component 16, so that the rotation lock of the raising component 16 can be released even if tools are not brought to the work site, thereby shortening the work time required to clear the straw jam.
In the invention of claim 4, since the transmission vertical shaft 31 can be rotated manually to a position where the connection can be released, the worker can carry out the work without using tools and the labor required for the work is reduced.
Since the state of the coupling clutch mechanism 35 can be visually observed from between the raising structure 16 and the transmission cross shaft 30, coupling and disengagement can be easily performed, improving work efficiency.
In the invention of claim 5, the opening/closing pivot shaft 23 is attached via the boss 40 and the pin 41, so that when the raising structure 16 is pivoted forward, the bottom (lug) of the raising structure 16 does not come into contact with the ground, thereby preventing damage to the raising structure 16.
By making the lifting upper cover 42 rotatable upward, the upper part of the lifting device 15 can be exposed, so that maintenance and adjustment work can be easily performed.
By providing the posture maintaining member 43, the raising structure 16 does not rotate during maintenance work or work to remove jams of straw, thereby preventing the working space from being narrowed.
In the invention of claim 6, the upper side of the grass dividing rod (grass dividing body) 11 is located at a height below the raising component 16 which has been rotated toward the front of the body of the machine, thereby ensuring a wide work space for maintenance and stalk removal without narrowing the rotation range of the raising component 16.
By providing an extended upper grass pole 11A on the upper side of the grass dividing pole 11, it is possible to prevent the rotation range of the lifting structure 16 from being narrowed, and the grass dividing pole 11 can be made to lift the stalks until they approach the lifting device 15, stabilizing the harvesting of the stalks.
In the invention of claim 7, the upper side of the grass separating guide bar 47 is arranged to protrude forward of the body, so that it can be used as a handle when opening and closing, thereby reducing the effort required for opening and closing.
By positioning the rod-shaped grass dividing guide 48 close to the non-rotating raising component 16 at the left and right ends, it is positioned so as not to interfere with the rotation trajectory of the rotating raising component 16, thereby preventing damage due to contact.

Side view of a combine harvester. FIG. 2 is a side view of the harvesting device and a schematic side view of the raising structure. 4 is a partial side view of the raising structure, a side view of the connecting clutch mechanism, and a partial front view of the raising structure; FIG. 4A and 4B are partial front and plan views of a coupling clutch mechanism. FIG. FIG. 13 is a side view of the vicinity of the opening/closing pivot shaft with the raising structure pivoted forward. FIG. 4 is a side view of the raising structure rotated forward. Side and front views of the extension rod. Front view of the lifting device of a four-row harvesting device. 2 is a front view and a side view of the harvesting device. FIG. 1 is a perspective view of a mowing device before the raising structure is rotated forward, and FIG. 2 is a schematic perspective view of the mowing device with a portion of the raising structure rotated forward. A partial front view of the lifting device of a five-row harvesting device. Front view of the lifting device of a six-row harvesting device. Front view of the lifting device of a 7-row harvesting device. Top view of a combine harvester. Top view of a combine harvester. 1A is a side view of the posture maintaining member (cable hook) in use and a front view of the posture maintaining member in a stored state. FIG. FIG. 13 is a schematic perspective view of another embodiment in a state in which a portion of the raising structure is rotated forward. The same side view. FIG. 13 is a perspective view of another embodiment of a frame of a harvesting device. FIG. 13 is a side view of an embodiment in which a link arm is provided. FIG. 13 is a schematic perspective view of another embodiment in a state in which a portion of the raising structure is rotated forward. FIG. 13 is a side view of an embodiment with a cable or arm. FIG. 13 is a perspective view of an embodiment having a harvesting frame with an oiling hose. FIG. 2 is a side view of the traveling device without the crawlers. The same plan view. Front and side views of the rear foot area. Plan, side and rear views of the rollers. Plan, side and rear views of the rollers. 1 is a front view, an oblique view, and a plan view of the handlebar area of the steering section.

One embodiment of the present invention will be explained with reference to the drawings. 1 is a combine body frame, 2 is a traveling device, and a threshing device 3 is provided on one side above the traveling device 2 for separating the cut stalks into grains and straw. In front of the threshing device 3 is a harvesting device 4 for harvesting stalks from the field to be supplied to the threshing device 3. A grain tank 5 is provided to the side of the threshing device 3, and a steering unit 6 is provided in front of the grain tank 5 (Figure 1).
In explaining the present invention, in order to facilitate understanding, directions such as front/back, left/right, up/down, etc. will be indicated based on the forward traveling direction of the combine harvester, but this does not limit the configuration of the present invention.
The harvesting device 4 is provided with a grass dividing device 10 at its frontmost position for dividing the culms in the field. A plurality of grass dividing devices 10 are arranged side by side in the left-right direction. The grass dividing device 10 has a grass dividing rod (grass dividing body) 11 for dividing the culms attached to the tip of a grass dividing frame 12 in the front-rear direction, and the base of the grass dividing frame 12 is attached to a harvesting frame 13 of the harvesting device 4 (Figure 2).
A lifting device 15 for lifting the stalks in the field is provided behind the grass-dividing device 10. The lifting device 15 is configured by arranging a plurality of lifting structures 16 side by side in the left-right direction. The configuration of each lifting structure 16 is optional, and is configured by hanging a lifting lug chain 19 with a lifting lug 18 attached to a lifting frame 17, and surrounding the front side of the lifting lug chain 19 with a lifting cover 20 (Fig. 2).

In a combine harvester equipped with a traveling device 2, a lifting device 15 that pulls up crops growing in a field, a harvesting mechanism 21 that harvests the crops, and a threshing device 3 located to the left rear of the harvesting mechanism 21 that takes over the crops and threshes them, an opening/closing pivot shaft 23 that supports the upper side of the lifting device 15 so that it can rotate in the fore-and-aft direction of the machine body is provided on the lower side of the lifting device 15, and when the lifting device 15 is rotated to the opening side (towards the front of the machine body) around the opening/closing pivot shaft 23, a maintenance space M is secured on the upper side of the lifting device 15 (Figure 7).
In this case, the locking device that keeps the lifting device 15 in an operating state is unlocked, and the lifting device 15 is rotated to the opening side (toward the front of the aircraft) around the opening/closing pivot axis 23, forming a maintenance space M on the upper side of the lifting device 15.
In other words, the harvesting device 4, which is provided in front of the traveling device 2, is configured to at least have a lifting device 15 at the front part of the harvesting device 4 for lifting up crops growing in the field, a harvesting mechanism 21 having a cutting blade 24 for harvesting the raised crops at the rear of the lifting device 15, and a stalk transport device 25 behind the lifting device 15 for transporting the crops (culms) cut above the harvesting mechanism 21 rearward.
Reference numeral 26 denotes a tip side transport device which constitutes part of the stalk transport device 25, 27 denotes a support case, 28 denotes a harvesting support arm, 29 denotes a raking device, and 29A denotes a raking support frame.

The upper side of the lifting device 15 is rotated to the opening side (front side of the aircraft) around an opening/closing rotation shaft 23 that supports the upper side of the lifting device 15 so that it can be rotated in the fore-and-aft direction of the aircraft, and a maintenance space M is formed on the upper rear side of the lifting device 15.
In other words, the raising device 15 (raising structure 16) is configured so that the upper side of the raising structure 16 rotates toward the front of the aircraft around the opening/closing pivot axis 23 provided at a predetermined position on the lower side of each raising structure 16, and the upper side of the raising structure 16 is rotated toward the front of the aircraft to form a maintenance space M on the upper rear side of each raising structure 16.
Therefore, by providing an opening/closing pivot shaft 23 on the lower side of the lifting device 15, when the upper part of the lifting device 15 is opened, it can maintain the open state by its own weight, and the lifting device 15 will not return to its original position (close) unintentionally during maintenance work, ensuring the safety of the work.
Furthermore, since there is no need for a position maintaining structure such as a large-scale damper to maintain the open state, the number of parts in the entire harvesting device 4 including the lifting device 15 can be reduced and the structure can be simplified.
The lifting device 15 only needs to be rotated forward an amount corresponding to the maintenance space M formed on the upper rear side of the lifting device 15, centered on the opening/closing rotation axis 23.Therefore, there is no need to move the lifting device 15 a large distance, as was the case in the past.Since the rotation range of the lifting device 15 in the open state is reduced, the lifting device 15 can be opened and closed (rotated) even in a narrow space, improving maintenance workability and enabling the work of removing clogged grain stalks to be performed quickly.

In this case, the locking mechanism provided at a predetermined position on the lifting device 15 is unlocked, and the lifting device 15 is rotated to the opening side (front of the machine body) around the opening/closing pivot shaft 23, forming a maintenance space M on the upper side of the lifting device 15, thereby preventing the lifting device 15 from rotating forward during normal mowing operation.
The lifting device 15 is configured by arranging multiple lifting components 16 in the left-right direction, with the left and right outer lifting components 16A not equipped with a rotation mechanism, and an opening/closing rotation shaft 23 is attached to the lower part of at least one intermediate lifting component 16B of the lifting components 16 located between the left and right outer lifting components 16A. The lifting transmission mechanism D, which transmits driving force to the lifting device 15, is input from the upper side of the lifting components 16, and when the connection is released, the lifting components 16 become rotatable (Figure 3).
In other words, the lifting device 15 has multiple lifting components 16 arranged side by side in the left-right direction, and of the multiple lifting components 16, the lifting components 16A on both the left and right sides are attached to the cutting frame 13 side in a state in which they cannot be rotated forward, and the lifting component 16B located between the outer left and right lifting components 16A is configured to rotate forward around an opening/closing rotation shaft 23 provided at the bottom (Figures 6 and 7).
In addition, the raising transmission mechanism D, which transmits the driving force to the raising device 15, is configured to receive the force from the upper side of the raising component 16, and the raising component 16 is configured to be freely attached and detached to the raising transmission mechanism D. When the connection between the transmission mechanism D and the raising component 16 is released, the raising component (raising component 16B) 16 can be rotated forward.

Therefore, by making the intermediate lift-up component 16B, which is located between the left and right lift-up components 16 and is frequently opened during maintenance and clogging removal work, rotatable forward, the weight (operating load) required for the rotation operation can be reduced, thereby reducing the labor required by the worker.
The raising transmission mechanism D, which transmits driving force to each raising component 16, is removably connected to the upper side of the raising component 16, so that the raising transmission mechanism D also serves as a receiving member for the raising component 16, thereby preventing the raising component 16 from rotating forward when the connection is released.
The raising transmission mechanism D is composed of a horizontal transmission shaft 30 that transmits driving force in the left-right direction, a vertical transmission shaft 31 that switches the transmission direction from the horizontal transmission shaft 30 to the vertical direction, and a raising transmission case 32 that distributes the driving force from the vertical transmission shaft 31 to each raising component 16.
The transmission vertical shaft 31 is divided into an upper shaft 33 and a lower shaft 34 , which are connected via a connecting clutch mechanism 35 .
When the coupling clutch mechanism 35 is moved to the release position, the transmission vertical shaft 31 is in a separated state, and when the lower shaft 34 is positioned in a removable position, the raising structure 16 is in a rotatable non-coupled state.
That is, when the connecting clutch mechanism 35 is moved to the release position, the lower shaft 34 attached to the raising transmission case 32 becomes movable in the front-rear direction, and becomes in a non-connected state in which it can rotate in the front-rear direction together with the raising structure 16.

Therefore, by using the connecting clutch mechanism 35, which switches the connection state of the transmission vertical shaft 31, as a rotation lock mechanism for the raising component 16, the rotation lock of the raising component 16 can be released even if tools are not brought to the work site, thereby shortening the work time required to clear the straw jam.
A lifting speed change lever 36 for changing the operating speed of the lifting device 15 is provided in a predetermined position (Figs. 1 and 15). When the lifting speed change lever 36 is operated to the neutral position to cut off the transmission, the lifting lug chain 19 of the lifting structure 16 can be manually operated to rotate the vertical transmission shaft 31. The connecting clutch mechanism 35 is positioned so that it can be seen from the space 37 between the upper end of the lifting structure 16 and the horizontal transmission shaft 30, and the connected/disconnected state can be visually determined (Fig. 3).
In the embodiment of Figures 15 and 16, the pull-up speed change lever 36 is provided on the front operation panel of the steering unit 6, but is provided within easy reach from the front of the reaping device 4.
Since the transmission vertical shaft 31 can be rotated manually to a position where it can be released from the connection, the worker can carry out the work without using tools and the labor required for the work is reduced.
Since the state of the coupling clutch mechanism 35 can be visually observed from between the raising structure 16 and the transmission cross shaft 30, coupling and disengagement can be easily performed, improving work efficiency.
The transmission horizontal shaft 30 is rotatably mounted inside the upper transmission cylinder 50, and the upper part of the vertical transmission pipe 31A is fixedly attached to the upper transmission cylinder 50. The vertical transmission pipe 31A is divided into an upper cylinder 33A and a lower cylinder 34A, and a connecting clutch mechanism 35 is provided between the upper cylinder 33A and the lower cylinder 34A (Figure 3).

The opening/closing rotation shaft 23 is connected to the lower side of the raising frame 17, and the raising upper side is configured to rotate. The raising upper cover 42 of the raising device 15 is attached to be able to rotate upward.
A position-maintaining member (hook rod) 43 for holding the raising structure 16 in the forward tilted position is provided inside the raising upper cover 42 (FIG. 17).
That is, an inverted L-shaped pin (stay) 41 is fixedly provided on the grass dividing frame 12 when viewed from the side, and an opening/closing pivot shaft 23 is provided on a boss 40 at the tip of the pin 41, so that the raising structure 16 can rotate forward around the opening/closing pivot shaft 23 (Figure 5).
The relationship between the boss 40, the opening/closing pivot shaft 23, and the raising frame 17 of the raising structure 16 is arbitrary, as long as the raising structure 16 rotates forward around the opening/closing pivot shaft 23, and the opening/closing pivot shaft 23 may be configured to either be rotatable or fixed relative to the boss 40.
Similarly, the opening/closing pivot shaft 23 may be attached to the raising frame 17 in a fixed state or in a freely rotatable state.
The raising upper cover 42 surrounds the front periphery of the transmission horizontal shaft 30 or the upper transmission cylinder 50 in which the transmission horizontal shaft 30 is built, and a position maintaining member 43 is housed in the space between the raising upper cover 42 and the upper transmission cylinder 50. The position maintaining member 43 engages with a predetermined upper portion of the raising structure 16 that has been rotated forward and set in a forward inclined position, and the base of the position maintaining member 43 engages with the transmission horizontal shaft 30 or the upper transmission cylinder 50 side (FIGS. 7 and 17).

By attaching the opening/closing pivot shaft 23 via the boss 40 and the pin 41, when the raising component 16 is pivoted forward, the bottom (lug) of the raising component 16 does not come into contact with the ground, thereby preventing damage to the raising component 16.
By making the lifting upper cover 42 rotatable upward, the upper part of the lifting device 15 can be exposed, so that maintenance and adjustment work can be easily performed.
By providing the posture maintaining member 43, the raising structure 16 does not rotate during maintenance work or work to remove jams of straw, thereby preventing the working space from being narrowed.
A grass dividing rod (grass dividing body) 11 is placed at the tip of the grass dividing frame 12 to raise the culms and separate adjacent culms (Figure 2).
The upper side of the grass dividing rod 11 is positioned at a height that is located below the raising component 16 when the raising component 16 is rotated toward the front of the body, and an extension grass dividing rod (extension grass body) 11A that can be rotated in the fore-and-aft direction of the body is attached to the upper side of the grass dividing rod 11 (Figure 8).
By positioning the upper side of the grass dividing rod 11 at a height that is below the raising component 16 that has been rotated toward the front of the machine body, the rotation range of the raising component 16 is not narrowed, and a large work space can be secured for maintenance and stalk removal.
By providing an extension rod 11A on the upper side of the rod 11, the rotation range of the lifting structure 16 can be prevented from being narrowed, and the rod 11 can be made to lift the stalks until they approach the lifting device 15, stabilizing the harvesting of the stalks.

Of the rotating raising components 16, in the section where two raising components 16 rotate simultaneously, the upper side of the machine body of the grass separating guide bar 47, which separates tangled stalks, is positioned so as to protrude toward the front of the machine body (Figure 10).
A rod-shaped grass dividing guide 48 is provided on the upper part of one row of grass dividing rod 11 located between the left and right sides of the rotating raising structure 16 adjacent to the non-rotating raising structure 16 at the left and right ends (Figures 9 and 10).
The position of the grass dividing guide 48 is near the non-rotating raising structure 16 at the left and right ends (Figure 10).
That is, the lifting device 15 is configured by arranging a plurality of lifting components 16 in the left-right direction so as to correspond to the lifting of a plurality of culms in a field, and among the plurality of lifting components 16, the lifting components 16A on both the left and right outer sides are fixed to the harvesting frame 13 so as not to be rotated, and the intermediate lifting components 16B located between the lifting components 16A on both the left and right outer sides are configured to be rotated forward, in this case, the rotating lifting components 16B located between the lifting components 16A on both the left and right outer sides lifts at least one culm, but in order to lift a plurality of culms, a plurality of rotating lifting components 16B are provided corresponding to the plurality of culms. The plurality of rotating lifting components 16B are configured to be able to rotate forward individually or integrally.

For example, in the case of four-row mowing, two pivoting raising components 16B are provided between the outer left and right raising components 16A, and these two pivoting raising components 16B are configured to pivot forward as a unit, thereby simplifying the configuration and facilitating the pivoting operation (Figure 11).
In addition, in the case of five-row mowing, three pivoting and raising components 16B will be provided, of which two of the three pivoting and raising components 16B are configured to pivot forward as a unit, and the remaining pivoting and raising component 16B is configured to pivot forward independently (Figure 12).
For this reason, a plurality of pivotable raising components 16B are provided between the left and right outer raising components 16A, and some or all of the pivotable raising components 16B are configured to be pivotable forward as a unit.
In other words, the fixed side raising component 16A is formed by arranging the left and right outer raising components 16A and the upper transmission cylinder 50 in a gate-shaped frame shape, and the rotating raising component 16B is arranged between the left and right outer raising components 16A, so that the rotating raising component 16B can be smoothly rotated forward.
Among the multiple rotating lifting components 16B, the two lifting components 16 rotate simultaneously (integrally) on the rotating lifting components 16B, and a grass dividing guide bar 47 formed of a vertically long shaft rod member is provided at the left and right middle position of the left and right rotating lifting components 16B. The grass dividing guide bar 47 is formed by projecting the upper part forward of the machine body.

Similarly, FIG. 13 shows a lifting device 15 for six-row mowing, and FIG. 14 shows a lifting device 15 for seven-row mowing.
Therefore, the grass-dividing guide bar 47 can prevent the stalks from becoming entangled in the back-to-back raising frame 17 portions of the two raising components 16B where the raising lugs 18 do not act.
In addition, a rod-shaped grass dividing guide 48 is provided on the upper part of the grass dividing rod 11 located between the non-rotating fixed raising components 16A on both the left and right sides and the adjacent rotating raising component 16B, and the position of the grass dividing guide 48 is positioned closer to the adjacent non-rotating fixed raising component 16A than the left and right middle position of the grass dividing rod 11 when viewed from the front.
Therefore, when the pivotable and raising component 16B rotates, the raising lug 18 of the pivotable and raising component 16B rotates forward to prevent interference with the grass dividing guide 48.
By making the upper side of the grass separating guide bar 47 protrude forward of the machine, it can be used as a handle when opening and closing, thereby reducing the effort required for opening and closing (Figure 10).
By positioning the rod-shaped grass guide 48 close to the non-rotating raising component 16 at the left and right ends, it is positioned so as not to interfere with the rotation trajectory of the rotating raising component 16, thereby preventing damage due to contact (Figure 12).

In other words, since the grass dividing rod 11 and the rod-shaped grass dividing guide 48 are fixed in position, when the raising component 16 is rotated forward, there is a risk that the raising lug 18 of the raising component 16 rotating forward will abut against and interfere with the grass dividing guide 48, but since it is positioned close to the non-rotating raising component 16, abutting interference is prevented.
A part or all of the lifting structure 16 of the lifting device 15 of the 3- to 7-row self-feeding combine harvester 4 is configured to be rotatable forward.
Therefore, a maintenance space M can be created behind the lifting device 15, making it possible to quickly remove stalks that are stuck in the harvesting and conveying section stalk conveying device 25.
The upper part of the raising structure 16 is tilted forward around an opening/closing pivot shaft 23 at the lower end of the raising frame 17 and the raising cover 20 which are integral with each other.
Therefore, the maintenance space M can be secured without having to raise the raising structure 16 upward as in the conventional case, thereby improving the assurance of safety during maintenance.
Since the lifting structure 16 is merely tilted forward, it is not necessary to support the entire weight of the lifting device 15 and swing it up as in the conventional case, and the lifting can be opened with a small force.
In the conventional opening method, it is necessary to detach the lower part of the lifting device 15 from the cutting frame, and tools are also required, but in the present invention, no tools are required and it does not take much time to open the harvester.

Since the raising structure 16 is not swung upward, a holder (damper) is not required, and the number of parts can be reduced, leading to cost reduction.
Since the maintenance space M can be formed behind the raising structure 16 without swinging the raising structure 16 upward, the working space for securing the maintenance space M can be made small.
That is, in the conventional method, the lifting device 15 is swung upwards significantly, which requires space for this and therefore a large maintenance work space. However, in the present invention, maintenance is possible as long as there is enough space to rotate the lifting structure 16 forward.
The lifting device 15 has multiple lifting components 16 arranged side by side in the left-right direction, and of the multiple lifting components 16, the lifting components 16A on both the left and right sides are attached in a fixed position on the cutting frame 13 side, and one or more lifting components 16B located between the left and right outer lifting components 16 are configured to rotate forward around an opening/closing pivot axis 23 provided at the bottom of the lifting components 16B.
In this case, in the case of a three-row cutting device 4, the raising structure 16 for the central row can be configured to be tilted forward; in the case of a four-row cutting device 4, the raising structure 16 for the central two rows can be configured to be tilted forward; in the case of a five-row cutting device 4, the raising structures 16 for the central two rows and the raising structure 16 for the first row can be configured to be tilted forward; in the case of a six-row cutting device 4, two points on the raising structure 16 for the second row can be configured to be tilted forward; and in the case of a seven-row cutting device 4, the two points on the raising structure 16 for the central two rows and the raising structure 16 for the first row can be configured to be tilted forward.

Therefore, since the lifting components 16 on both the left and right outer sides are fixed, the lifting component 16 located in the middle is rotated forward while ensuring the rigidity of the harvesting device 4, so that a maintenance space M can be created behind the lifting device 15 with a simple operation, and stalks stuck in the harvesting and conveying section stalk conveying device 25 can be removed early.
The raising frame 17, the raising cover 20, the raising lug 18 and the raising transmission case 32 are integral and separated from the upper transmission cylinder 50, and are tilted forward (about 30 degrees) from the vertical to create a maintenance space M.
Therefore, since the raising structure 16 is not swung upward, safety during maintenance can be ensured, the raising structure 16 can be raised and opened while its weight is supported by the opening/closing pivot shaft 23, making the opening work easy, requiring no tools and taking no time to reach the open state, eliminating the need for holding devices such as dampers to support the weight of the raising structure 16, allowing for a reduction in the number of parts and costs, and moreover, since the raising structure 16 is not swung up, the open state can be achieved in a small space.
The connecting clutch mechanism 35 provided between the transmission horizontal shaft 30 and the raising transmission case 32 is divided and separated to rotate the raising structure 16 forward relative to the cutting frame 13 (FIG. 3).

This allows the raising structure 16 to be easily rotated forward, facilitating the formation of the space M and facilitating maintenance work such as dealing with grain straw clogging.
The connecting clutch mechanism 35 is provided in the upper or lower middle part of the transmission vertical shaft 31, and the configuration of the connecting clutch mechanism 35 is arbitrary as long as it is configured to turn on and off the rotation transmission between the upper shaft 33 and the lower shaft 34 of the connecting clutch mechanism 35, and to divide, separate, and join the upper shaft 33 and the lower shaft 34.
For example, the connecting clutch mechanism 35 has a convex claw 53 formed on either the lower part of the upper shaft 33 or the upper part of the lower shaft 34 of the transmission vertical shaft 31, and a concave groove 54 formed on the other. When the convex claw 53 and the groove 54 are engaged and locked, the rotation is transmitted, and when the convex claw 53 and the groove 54 are separated, the lock is released, and the raising member 16 is configured to be rotatable forward (FIG. 3).
The connecting clutch mechanism 35 separates the transmission vertical shaft 31 into an upper shaft 33 and a lower shaft 34 vertically, forms a convex claw 53 on either the lower part of the upper shaft 33 or the upper part of the lower shaft 34, and forms a concave groove 54 on the other. When the convex claw 53 and the groove 54 are engaged and locked, the rotation is transmitted, and when the convex claw 53 and the groove 54 are separated, the lock is released, and the raising structure 16 is configured to be rotatable forward (FIG. 3).

That is, the transmission vertical shaft 31 is divided into an upper shaft 33 and a lower shaft 34 vertically, a convex claw 53 of the coupling clutch mechanism 35 is provided on either the lower part of the upper shaft 33 or the upper part of the lower shaft 34, and a concave groove 54 of the coupling clutch mechanism 35 is provided on the other of the lower part of the upper shaft 33 or the upper part of the lower shaft 34, and the coupling clutch mechanism 35 is provided in the middle part of the transmission vertical shaft 31.
When the protruding claws 53 and the recessed grooves 54 are engaged with each other in a locked state, the driving rotation of the upper shaft 33 is transmitted to the lower shaft 34 .
Furthermore, by orienting the groove 54 of the vertical transmission shaft 31 in the forward/rearward direction, the convex claw 53 can be made detachable from the groove 54. In this state, the lower shaft 34 and the main body of the raising structure 16 can be rotated forward while the upper shaft 33 remains on the horizontal transmission shaft 30 side.
In order to position the protruding claw 53 in the forward/rearward direction when separating, the raising speed change lever 36 is set to a neutral position, transmission is interrupted (cut off), and the raising lug chain 19 is manually raised or lowered, so that the position of the protruding claw 53 can be adjusted with a small force.
That is, a connecting clutch mechanism 35, which switches the driving force transmitted to the raising structure 16 on and off, is provided in the rotation transmission path, and when the connecting clutch mechanism 35 is turned to "off" with the raising speed change lever 36, the raising lug 18 of the raising structure 16 can be manually rotated. Manually rotating the raising lug 18 rotates the transmission vertical shaft 31, and by manually rotating the raising lug 18, the convex claw 53 is aligned at a releasable position in the fore-and-aft direction, and the connecting clutch mechanism 35 is released to rotate the raising structure 16 forward.

Therefore, the connecting clutch mechanism 35 can be unlocked and the raising structure 16 can be opened without using any tools.
The mechanism for operating the connecting clutch mechanism 35 by the raising and lowering gear shift lever 36 is arbitrary. For example, a switch (not shown) may be provided that detects when the raising and lowering gear shift lever 36 has reached the OFF position, and a solenoid or the like may be provided that turns the connecting clutch mechanism 35 OFF when this switch is turned ON.
In addition, a clutch on/off wire may be provided on the pull-up shift lever 36, and a cut-off pin may be provided at the end of this clutch on/off wire, so that when the pull-up shift lever 36 is operated to the cut position, the cut-off pin comes into contact with the connecting clutch mechanism 35, causing the connecting clutch mechanism 35 to be switched off.
The connecting clutch mechanism 35 and the pull-up shift lever 36 of the convex claw 53 and the concave groove 54 are disposed adjacent to each other.
This makes it easier to operate the coupling clutch mechanism 35.
The coupling clutch mechanism 35, which is constituted by the protruding claws 53 and the recessed grooves 54, is configured so as to be visible from the space 37 (FIG. 3).

The connecting clutch mechanism 35, which is constituted by the protruding claw 53 and the concave groove 54, has a space 54A formed at the base of the teeth of the connecting clutch mechanism 35 (FIG. 4).
This facilitates the operation of connecting or disconnecting the convex claw 53 and the concave groove 54 of the connecting clutch mechanism 35 .
The opening/closing pivot shaft 23 at the bottom of the raising structure 16 is configured to hold the lowest end parts of the two central raising structures 16 and the grass dividing frame 12 of the multiple raising structures 16 arranged side by side for multi-row cutting with a boss 40 and a pin 41.
That is, the two central raising components 16 are configured to rotate in the fore-and-aft (up-and-down) direction of the machine body with the rotating support shaft 23 as a fulcrum (FIGS. 5 and 9).
In this case, only the two central lifting structures 16B are configured to rotate up and down, and the lifting structures 16A on both the left and right ends are normally fixed to the cutting frame 13 side, but the lifting structures 16A on both the left and right ends can also be attached and detached by removing bolts, etc., making maintenance easy.
This prevents interference such as the tip of the rotating pulling lug 18 coming into contact with the field surface during harvesting work.
In addition, in a multiple-row harvesting device 4, the multiple intermediate raising structures 16B may be configured to rotate forward as a unit.

A liftable upper cover 42 provided in front of the transmission horizontal shaft 30 can be rotated upward to open.
This allows the raising structure 16 to rotate forward smoothly.
When the raised upper cover 42 is configured to be rotated upward, the tip of the raised upper cover 42 moves in an arc, so that the lower end position enters the space 37 above the raised cover 20, and therefore there is no interference when attaching or detaching.
On the other hand, in the case of a device in which the lift-up upper cover 42 is pulled out toward the front of the body or removed, the lift-up cover 42 is likely to wobble vertically when returned to its original position, and is likely to come into contact with the upper end of the lift-up cover 20, making removal difficult.
In addition, the engagement of the coupling clutch mechanism 35 can be easily confirmed.
In addition, with the upper lifting cover 42 rotated upward and open, the transmission horizontal shaft 30 side and the lifting structure 16 rotated forward are connected and held by the position holding member 43 (FIG. 17).
In this case, if the unused posture maintaining member 43 is configured so that it can be stored inside the lifting upper cover 42 that has been returned to its original position, the inner space of the posture maintaining member 43 can be effectively utilized and the operation of connecting and maintaining the posture maintaining member 43 can be facilitated.

In addition, with the upper lift-up cover 42 rotated upward and open, the transmission horizontal shaft 30 side and the lift-up structure 16 which has been rotated forward are connected and held by a cable hook 63 (FIG. 17), and the cable hook 63 is configured so as to be able to be stored inside the upper lift-up cover 42 which has been returned to its original position.
Therefore, the inner space of the cable hook 63 can be effectively utilized, and the operation of connecting and holding the cable hook 63 can be facilitated.
A raising lug tension member 65 and a raising cover holding member 66 are attached to the lower tube 34A on the rear side of the raising structure 16 that is opened (FIG. 3).
That is, the raising lug tension member 65 is a plate member that is provided near the upper sprocket 19A of the raising chain 19 that rotates and has a plurality of raising lugs 18 (FIG. 3) and prevents the raising chain 19 from slackening.
The lifting cover holding members 66 are provided on both the left and right sides of the lifting transmission case 32 and serve to mount the lifting structures 16, and are attached to the lifting frame 17 side by two bolts (not shown), one on the top and one on the bottom.
The lower cylinder 34A surrounds the lower shaft 34 in the vertical direction, which transmits driving force into the raising transmission case 32 when the connecting clutch mechanism 35 is in a connected state.

The transmission horizontal shaft 30 and the lower branch frame 12 are connected and supported by a frame pipe 70 (Figure 7).
Therefore, when the raising structure 16 is opened forward, the raising structure 16, which is a strength member, is no longer present, but the upper transmission case 71 and the grass dividing frame 12 can be firmly supported by the frame pipe 70.
In addition, a tip guide 72 and a detachable transmission holder 73 are attached to the frame pipe 70.
Therefore, even though the lower cylinder 34A can be separated into upper and lower parts, during normal operation the lower cylinder 34A can be fixed to the frame pipe 70 (the fixed side of the harvesting device 4) by the detachable transmission holder 73, allowing stable operation.
An upper tip guide 74 is provided on the upper rear side of the raising structure 16, and the upper tip guide 74 is configured to rotate forward together with the raising structure 16, and a lower tip guide 75 is provided below the upper tip guide 74 and is supported by the frame pipe 70.
The connecting clutch mechanism 35 between the horizontal transmission shaft 30 and the vertical transmission shaft 31 is divided and separated for rotation, and when the raising component 16 is rotated forward, interference between the lower end of the raising component 16 and the grass dividing rod 11 occurs, so this is avoided and the shape is such that there is no interference above the grass dividing frame 12.
That is, the upper height of the dividing rod 11 is formed low to prevent interference with the lower end of the raising structure 16.

The lever 11 is divided into two parts, upper and lower, and the upper lever 11A is made rotatable forward to prevent interference when the raising structure 16 is opened.
At least the upper lever 11A of the lever 11 is made of a flexible resin material.
Therefore, even if the raising component 16 comes into contact with the upper lever 11A when the raising component 16 rotates forward, damage to both the raising component 16 and the upper lever 11A is prevented.
The frame pipe 70 and the raising structure 16 to be lowered are connected by a link arm 78 (FIG. 21).
Therefore, excessive forward rotation of the raising structure 16 is suppressed.
The frame pipe 70 and the lifting structure 16 to be lowered are connected by a long hole arm 79 or a cable 80, and the lifting structure 16 is held in position when lowered (FIG. 23). Therefore, the lifting structure 16 is firmly supported when lowered.
Furthermore, by connecting with a long hole arm 79 or a cable 80, the raising structure 16 can be firmly supported at any desired tilt angle.

The oil supply hose 81 of the raising lug chain 19 is configured to pass from the grass dividing frame 12 below the raising structure 16, near the opening and closing pivot shaft 23, and be routed near the raising roller 82 (Figure 24).
Therefore, the presence of the oil supply hose 81 is prevented from interfering with the forward tilting rotation of the raising structure 16.
The tip sensor 83 is disposed on the frame pipe 70 (FIG. 19).
Therefore, the presence of the tip sensor 83 does not interfere with the forward rotation of the raising structure 16.
A round-rod-shaped grass-splitting guide bar 47 is installed in the middle of the gap between adjacent raising components 16. Its shape and positioning are designed to prevent interference with other parts when the raising components 16 are opened and to be used as a handle for opening the raising components 16 (Figure 10).
A round-rod-shaped grass-splitting guide bar 47 is installed in the middle of the gap where the raising lugs 18 face each other, but the bar is moved toward the side of the raising lug 18 that does not rotate so as not to interfere with the raising lug 18 when the raising structure 16 is opened, forming a gap (Figure 10).
In a 3-, 5-, or 7-row combine harvester, a gap is formed between the raising lugs 18 and the raising cover 20 so that the raising lugs 18 do not interfere with the cover when the raising structure 16 is formed, at a place where the raising lugs 18 do not face each other and cover.

Therefore, since the outer end of the lifting lug 18 does not come into contact with the inner end of the lifting cover 20 while moving upward in the stored position, it is possible to prevent the lifting performance of the stalk from being reduced due to wear of the lifting lug 18 and the lifting chain equipped with the lifting lug 18 from flying off, resulting in failure to lift the stalk.
The left part 86 of the handle bar 85 is formed into a convex shape at the top, which also functions as a safety guard and ensures good visibility and prevents the machine from falling into the harvesting and transporting section (Figure 30).
This improves safety and prevents people from being caught in the vehicle if it falls while driving.
The left convex space 87 is shaped so as not to block the view of the left end (uncut stalks) of the reaping device 4 and not to affect the area around the arm operating the HST lever.
As shown in FIG. 30, a protruding space 87 is formed in a left portion 86 of a handle bar 85 on the inside of the vehicle body, and an operating member such as an HST lever is disposed below the protruding space 87.
This prevents the handlebar 85 from interfering with the operator's movements. In addition, since the handlebar 85 is formed by bending a rod-shaped member, it is easy to see the front side from the section.
Therefore, the machine body is moved by the traveling device 2, the reaping device 4 reaps the stalks in the field, and the reaped stalks are supplied to the threshing device 3, where the reaped stalks are separated into grains and waste straw.
In this case, the harvested stalks may become tangled in any part of the stalk conveying device 25 of the harvesting device 4 during harvesting operations. However, in the present invention, some of the multiple parallel lifting structures 16 of the lifting device 15 are configured to be rotatable toward the front of the machine body around the opening/closing pivot shaft 23 provided on the lower side. Therefore, when a blockage occurs, the machine body is stopped from traveling, the drive of the harvesting device 4 is stopped, and the lifting structure 16 is rotated toward the front of the machine body around the opening/closing pivot shaft 23, and a maintenance space M is formed on the upper side of the lifting device 15.

The grease nipple 87 is installed at an upward incline on the cylindrical portion 89 of the roller retaining stay 88 (Figure 26).
A fine grease injection hole is formed at the upper end of the grease nipple 87, and grease is injected into the cylindrical portion 89 by pressing a grease gun or the like against the grease nipple 87 to apply high pressure and inject grease.
Since the grease is injected and supplied at such high pressure, leakage of the grease from the injection hole formed in the grease nipple 89 is prevented due to factors such as the viscosity of the grease.
Therefore, the cap will not come off and the grease will not leak into the field, preventing contamination of the field and wear due to insufficient grease.
In addition, in this configuration, since the grease nipple 89 is formed in a portion that is recessed in the cross-sectional shape of the cylindrical portion 89 of the roller holding stay 88, the grease nipple 89 can be prevented from coming into contact with the ground.
Furthermore, since the grease nipple 87 is provided in a rearwardly upwardly inclined position when viewed from the side, it is easy to apply a grease supplying device such as a grease gun, thereby improving the efficiency of the supplying work.
This improves the durability of the rollers 90 and stabilizes the attitude of the vehicle when crossing wet rice paddies, banks, and entering farm fields, thereby improving maintenance performance (roller oiling ability).

The roller 90 is configured as a split structure on both sides that can be attached and detached downward from the lower part of the track roller frames 92 on both sides of the running frame 91, and a grease nipple 93 for injecting grease into the RBB inside the upper roller 90 ASSY is installed at an upward incline on the cylindrical portion 89 of the roller holding stay 88 (Figure 26).
This improves durability (protection of the first roller axle), stabilises aircraft attitude when crossing wet rice paddies, banks and entering farm fields, and improves maintenance performance (roller oiling ability).
The upper and lower rollers 90 are positioned with the roller assemblies facing back to back to make it easier to inject grease.
The number of lower rollers 90 is increased by one on each side.
Therefore, shaft damage, wear on the outer circumference of the rollers can be reduced, and vibration can be prevented. The additional rollers 90 are placed between the front and rear crawler guide grease nipples 93 in the center of the machine body.
This enables improved durability (protection of the first roller axle), stabilization of the aircraft posture when crossing wet rice paddies, banks, and entering farm fields, improved maintenance performance (roller oiling ability), and stabilization of the aircraft posture when crossing banks and lowering the aircraft.

From the front in the traveling direction of the aircraft, the first and second rollers 90 are evenly distributed across the front foot 94, and the fifth and sixth rollers 90 are evenly distributed across the rear foot 95.
This reduces vibration and improves foot durability.
The roller retaining stay 88 and the cylindrical portion 89 are formed as a single casting.
This allows for improved part precision and strength.
A grease nipple 93 for injecting grease into the RBB inside the upper roller ASSY is installed at an upward incline on the cylindrical portion 89 of the roller retaining stay 88.
This improves straightness, reduces the number of parts, cuts costs, and reduces weight.
A crawler tension arm 96 has one square tube inserted into the lower rear part of the traveling frame, and the lower square tube is also inserted in parallel to prevent the idle roller 99 from tilting.
This improves durability (protects the first roller axle), stabilises aircraft attitude when crossing wet rice paddies, banks and entering farm fields, improves maintenance performance (roller oiling ability), improves straight-line stability, reduces the number of parts, cuts costs and reduces weight.
When harvesting corn, it is necessary to increase the rear weight to improve the front-to-rear balance, so the tip of the square tube 97 is made of solid wood and is used as a replacement part in place of a weight (Figure 19).

1...machine frame, 2...traveling device, 3...threshing device, 4...harvesting device, 5...grain tank, 6...operating section, 10...grass dividing device, 11...grass dividing rod (grass dividing body), 11A...extended upper part of grass rod, 12...grass dividing frame, 13...harvesting frame, 15...raising device, 16...raising structure, 17...raising frame, 18...raising lug, 19...raising lug chain, 20...raising cover , 21... reaping mechanism, 23... opening/closing pivot shaft, 24... reaping blade, 25... stalk transport device, 30... horizontal transmission shaft, 31... vertical transmission shaft, 32... transmission case, 33... upper shaft, 34... lower shaft, 34A... lower cylinder, 35... coupling clutch mechanism, 36... raising speed change lever, 37... space, 40... boss, 41... pin, 42... raising upper cover, 43... attitude maintaining member, 47... grass division Guide bar, 48...grass division guide, 50...upper transmission tube, 53...convex claw, 54...concave groove, 63...cable hook, 65...pulling lug tension member, 66...pulling cover holding member, 70...frame pipe, 71...upper transmission case, 72...tip guide, 73...transmission detachment holder, 74...upper tip guide, 75...lower tip guide, 78...link arm, 79...long hole arm, 80...cable, 81...lubrication hose, 82...pulling roller, 83...tip sensor, 85...handle bar, 86...left part, 87...left convex space, 88...wheel holding stay, 89...cylindrical part, 90...wheel, 91...traveling frame, 93...grease nipple, 94...front foot, 95...rear foot, 96...crawler tension arm.

Claims (5)

In a combine harvester equipped with a traveling device (2), a lifting device (15) for lifting up crops growing in a field, a harvesting mechanism (21) for harvesting the crops, and a threshing device (3) for taking over the crops and threshing them at the left rear of the harvesting mechanism (21), an opening/closing pivot shaft (23) for supporting an upper side of the lifting device (15) so as to be rotatable in the front-rear direction of the machine body is provided at the lower side of the lifting device (15), and when the lifting device (15) is rotated toward the front side of the machine body around the opening/closing pivot shaft (23), a maintenance space (M) is secured at the upper side of the lifting device (15). The lifting device (15) is configured by arranging a plurality of lifting components (16) in the left-right direction, and both the left and right outer lifting components (16A) are configured without a pivot mechanism, and at least one of the lifting components (16) located between the left and right outer lifting components (16A) is provided with an opening/closing pivot shaft ( The raising transmission mechanism (D) is configured to transmit a driving force to the raising device (15) from the upper side of the raising structure (16), and when the connection state is released, the raising structure (16B) becomes rotatable. The raising transmission mechanism (D) is configured to transmit a driving force in the left-right direction from a horizontal transmission shaft (30), a vertical transmission shaft (31) that switches the transmission direction from the horizontal transmission shaft (30) to the vertical direction, and a transmission shaft (31) that transmits a driving force from the vertical transmission shaft (31) to each raising structure. The combine harvester is characterized in that it is composed of a pull-up transmission case (32) that distributes driving force to the pull-up structure (16), the transmission vertical shaft (31) is divided into an upper shaft (33) and a lower shaft (34) and is connected via a connecting clutch mechanism (35), and when the connecting clutch mechanism (35) is moved to a release position, the transmission vertical shaft (31) is in a divided state, and when the lower shaft (34) is pulled out, the pull-up structure (16) is in a rotatable unconnected state . The combine harvester of claim 1, characterized in that a lifting speed change lever (36) is provided for switching the working speed of the lifting device, and when the lifting speed change lever (36) is operated to neutral to cut off the transmission, the lifting lug chain (19) of the lifting structure (16) can be manually operated to rotate the transmission vertical shaft (31), and the coupling clutch mechanism (35) is arranged in a position visible from the space (37) between the upper end of the lifting structure (16) and the transmission horizontal shaft ( 30 ), so that the coupled/uncoupled state can be visually determined. A combine harvester as described in claim 1 or 2, characterized in that the opening and closing pivot shaft (23) of the rotating raising structure (16) is attached to the grass dividing frame (12) via a boss (40) and a pin (41), the opening and closing pivot shaft (23) is connected to the lower side of the raising frame (17) so that the upper raising side rotates, the raising cover (42) of the raising device (15) is attached rotatably upward, and a posture maintaining member (43) is provided within the raising cover (42) to hold the raising structure (16) in a forward tilted posture. A combine harvester as described in claim 1 or claim 2, characterized in that a grass dividing rod (11) for raising the culms and separating adjacent culms is arranged at the tip of the grass dividing frame (12), the upper side of the grass dividing rod (11) is at a height that is located below the raising structure (16) when the raising structure (16 ) is rotated toward the front of the body, and an extended partial grass rod (11A) that can be rotated in the fore-and-aft direction of the body is attached to the upper side of the grass dividing rod (11). A combine harvester as described in claim 1 or 2, characterized in that, in the portion of the rotating raising components (16) where two rows of raising components (16) rotate simultaneously, the upper side of the machine body of a grass dividing guide bar (47) that separates tangled stalks is arranged to protrude toward the front of the machine body, and a rod-shaped grass dividing guide (48) is provided on the upper part of a one-row grass dividing rod (11) located between the left and right sides of the rotating raising components (16) adjacent to the non-rotating raising components (16) at the left and right ends, and the position of the grass dividing guide (48) is closer to the non-rotating raising components (16) at the left and right ends .

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