JP7616269B2 - combine - Google Patents

Description

The present invention relates to a combine harvester equipped with a threshing section transport device that supplies grain stalks harvested by the harvesting device to a threshing device.

There is a manual threshing operation in which the stalks are cut manually in part of the field so that the reaping can be carried out along the access route or within the field, and the cut stalks are then manually placed in front of the feed chain of the threshing device for threshing (see Patent Document 1).

JP 2018-046865 A

Manually moving the stalks close to the moving feed chain is difficult without a great deal of experience, and is a dangerous task that can cause hands to get caught.

In addition, the amount of straw fed into the feed chain varies depending on the worker's skill, so if only small amounts are fed in, the work time will be long.

The present invention aims to provide a manual threshing attachment that can easily and safely supply stalks to the threshing section transport device of a threshing device, and to provide a combine harvester that allows manual threshing to be performed easily, efficiently, and safely.

The first invention relates to a combine harvester provided with a threshing section transport device (12) that takes over the culms transported from the harvesting device (4) and transports the culms to a threshing device (3), and is equipped with a manual threshing attachment (80) that is composed of a transport device (82) on which the culms are placed and transported, and a drive unit (83) that is connected to the threshing section transport device (12) and puts the transport device (82) into a transport operating state;
An opening/closing cover (3c) that can be opened and closed outward is provided at a lower position of the front end of the threshing section conveying device (12) of the cover (3a) covering the side of the threshing device (3);
The hand-threwing attachment (80) has a flat belt (82d) for transporting,
This combine harvester is characterized in that the stalks placed on the flat transport belt (82d) of the hand-threshing attachment (80) on the horizontal opening/closing cover (3c) which is open outward are transported to the threshing section transport device (12).
The second invention is a combine harvester according to the first invention, characterized in that a sensor is provided for detecting when the opening/closing cover (3c) is opened outward, and when the sensor detects that the opening/closing cover (3c) is opened outward, the control device controls the rotation speed of the engine (62) to a predetermined low speed suitable for hand threshing work, or controls the conveying speed of the threshing section conveying device (12) to a predetermined low speed suitable for hand threshing work.
The first invention related to the present invention is a combine harvester provided with a threshing section transporting device 12 that takes over the stew transported from the harvesting device 4 and transports the stew to the threshing device 3, and is equipped with a manual threshing attachment 80 composed of a transporting device 82 for placing and transporting the stew and a drive unit 83 that is connected to the threshing section transporting device 12 and puts the transporting device 82 into a transport operating state.

According to the first invention related to the present invention , a manual threshing attachment 80 is equipped which is composed of a transport device 82 for placing and transporting the stalks and a drive unit 83 which is connected to the threshing section transport device 12 and puts the transport device 82 into a transport operation state.Therefore, by having the worker place the stalks on the manual threshing attachment 80 from the side away from the threshing section transport device 12, there is no need to bring his/her hands close to the threshing section transport device 12, and manual threshing work can be performed easily, efficiently and safely.

The second invention related to the present invention is a combine harvester of the first invention related to the present invention, in which the transport device 82 of the hand-threshing attachment 80 is constructed by winding a transmission belt 82c and a transport body 82d around a pair of conveying rotors 82b, 82b rotatably mounted on a stay 81, and the drive unit 83 is constructed by pivoting an input gear 83c and a pulley 83d to a rotating arm 83b rotatably mounted on the stay 81 so that they can rotate together .

According to the second invention related to the present invention , in addition to the effects of the first invention related to the present invention , the transport device 82 of the hand-threshing attachment 80 is constructed by winding a transmission belt 82c and a transport body 82d around a pair of transport rotating bodies 82b, 82b rotatably mounted on the stay 81, and the drive unit 83 is constructed by pivoting an input gear 83c and a pulley 83d to a rotating arm 83b rotatably mounted on the stay 81 so that they can rotate together.Therefore, by engaging the input gear 83c of the drive unit 83 with the threshing section transport device 12, the transport device 82 can be driven in accordance with the transport speed of the threshing section transport device 12 while obtaining driving force, thereby preventing the occurrence of clogging of the straw and enabling threshing to be performed stably.

The third invention related to the present invention is a combine harvester of the first invention related to the present invention, in which the transport device 82 of the hand-threshing attachment 80 is configured by winding a transmission belt 82c and a transport body 82d around a pair of transport rotors 82b, 82b that are rotatably mounted on a stay 81, and the drive unit 83 is configured by an electric motor 90 that drives and rotates the transport rotors 82b and a motor drive switch 91 that turns the drive of the electric motor 90 on and off .

According to the third invention related to the present invention , in addition to the effects of the first invention related to the present invention , the transport device 82 of the manual threshing attachment 80 is constructed by winding a transmission belt 82c and a transport body 82d around a pair of transporting rotors 82b, 82b that are freely rotatably mounted on a stay 81, and the drive unit 83 is constructed by an electric motor 90 that drives and rotates the transporting rotor 82b and a motor drive switch 91 that turns the drive of the electric motor 90 on and off.Therefore, when the manual threshing attachment 80 is aligned with the threshing section transport device 12 that transports the stew to the threshing device 3, and the worker operates the motor drive switch 91 to turn on the drive of the electric motor 90, the stew is sent to the threshing section transport device 12, which prevents the stew from being pulled into the threshing device 3 at a time unintended by the worker, and ensures the safety of the work.

A fourth invention related to the present invention is a combine harvester of the second or third invention related to the present invention, in which a stay 81 connects a plurality of stay members 81a, 81b so as to be extendable and retractable, and the end of an extendable gripping arm 84 is attached to the end of a pair of conveying rotors 82b, 82b which are rotatably mounted on the stay 81.

According to the fourth invention related to the present invention , in addition to the effects of the second or third invention related to the present invention , the stay 81 connects multiple stay members 81a, 81b in an extendable and retractable manner, and the end of an extendable gripping arm 84 is attached to the end of a pair of conveying rotors 82b, 82b which are rotatably mounted on the stay 81. Therefore, the tension of the transport body 82d can be adjusted by changing the distance between the pair of conveying rotors 82b, 82b, and a situation in which slackness of the transport body 82d makes it difficult to transport the stalks to the threshing section transport device 12 can be prevented.

The fifth invention related to the present invention is a combine harvester of the first invention related to the present invention, in which an opening/closing cover 3c that can be opened and closed outward is provided at a lower position of the front end of the threshing section conveying device 12 of the cover 3a covering the side of the threshing device 3, a fixing mechanism is provided for opening the opening/closing cover 3c and fixing it in a horizontal position, the opening/closing cover 3c opened outward and fixed horizontally is used as a mounting platform for the hand-threshing attachment 80, and the inside of the opening/closing cover 3c is used as a storage section for the hand-threshing attachment 80.

According to the fifth invention related to the present invention , in addition to the effects of the first invention related to the present invention , an opening/closing cover 3c that can be opened and closed freely outward is provided at a lower position of the front end of the threshing section conveying device 12 of the cover 3a covering the side of the threshing device 3, and a fixing mechanism is provided for opening the opening/closing cover 3c and fixing it in a horizontal position, and the opening/closing cover 3c that is opened outward and fixed horizontally serves as a mounting base for the hand-threshing attachment 80, so that the hand-threshing attachment 80 can be placed on the horizontally fixed opening/closing cover 3c to perform hand-threshing work safely and with good workability.

In addition, the inside of the opening and closing cover 3c is used as a storage area for the hand-throwing attachment 80, so the hand-throwing attachment 80 can be stored inside the opening and closing cover 3c, preventing the user from forgetting to bring the hand-throwing attachment 80 into the field.

A sixth invention related to the present invention is a combine harvester of the fifth invention related to the present invention, in which a sensor is provided to detect when the opening/closing cover 3c is opened outward, and when the sensor detects that the opening/closing cover 3c has been opened outward, the control device controls the rotation speed of the engine 62 to a predetermined low speed suitable for hand threshing work, or controls the conveying speed of the threshing section conveying device 12 to a predetermined low speed suitable for hand threshing work.

According to the sixth invention related to the present invention , in addition to the effects of the fifth invention related to the present invention , a sensor is provided to detect when the opening/closing cover 3c is opened outward, and when the sensor detects that the opening/closing cover 3c is opened outward, the control device controls the rotation speed of the engine 62 to a predetermined low rotation speed suitable for hand threshing work, or controls the conveying speed of the threshing section conveying device 12 to a predetermined low speed suitable for hand threshing work, thereby eliminating the need to switch between normal work and hand threshing work and preventing a decrease in work efficiency and accuracy due to forgetting to switch.

FIG. 1 is a side view of a combine harvester according to an embodiment of the present invention. FIG. FIG. 2 is a side view of a main part of the threshing device of the combine harvester. FIG. FIG. FIG. 2 is an oblique view of the threshing section conveying device. FIG. 2 is a plan view of the hand-threshing attachment of the combine harvester. FIG. FIG. 2 is a perspective view of a main part of the hand-threading attachment. FIG. 2 is an exploded perspective view of the main parts of the hand-threading attachment. FIG. 4 is a perspective view showing another embodiment of the hand-threading attachment.

The following describes in detail the combine harvester according to an embodiment of the present invention with reference to the drawings.

For ease of understanding, the following descriptions will be used for convenience, referring to the front as the front side, the rear as the rear side, the right hand side as the right side, and the left hand side as the left side, as viewed from the pilot's perspective; however, the present invention is not limited to these descriptions.

<Overall composition>
As shown in Figures 1 and 2, the combine harvester has a traveling device 2 consisting of a pair of left and right crawlers for traveling in a field, which is provided below the body frame 1, a threshing device 3 for threshing and sorting is provided on the upper left side of the body frame 1, and a harvesting device 4 for harvesting grain stalks in the field is provided in front of the threshing device 3.

The grains threshed and sorted by the threshing device 3 are stored in the grain tank 5 located on the right side of the threshing device 3, and the stored grains are discharged to the outside through the discharge tube 7.

In addition, a cockpit 6 in which the pilot sits is provided on the upper right side of the aircraft frame 1, and an engine room 8 in which an engine 62 is mounted is provided below the cockpit 6.

<Harvesting device 4>
As shown in Figures 1 to 3, the harvesting device 4 is attached to a harvesting frame 30, which serves as the main frame, formed by a post-harvesting frame 28, a harvesting transmission case 29 arranged horizontally in the left-right direction at the tip of the post-harvesting frame 28, and a connecting frame 29A arranged vertically upward from the harvesting transmission case 29.

The base of the post-harvest frame 28 is attached to a portion biased to the right side of the horizontal transmission tube 36, which is rotatably supported on the upper part of a pair of left and right suspension stands 35, 35 that are erected on the machine frame 1.

The harvesting device 4 is equipped with a weed-dividing rod 31 at the front lower part for dividing the planted culms, a lifting device 32 at the rear of the weed-dividing rod 31 for raising the fallen planted culms, a cutting blade device 33 at the rear lower part of the lifting device 32 for cutting the base of the planted culms, and a conveying device 34 at the rear of the lifting device 32 and the cutting blade device 33 for conveying the harvested culms toward the threshing section conveying device 12 at one side of the threshing device 3.

The transport device 34 is composed of a base transport device 34A that transports the base side of the harvested stalks, and a tip transport device 34B that transports the tip side. In order to prevent the stalks from falling when they are handed over from the transport device 34 to the threshing section transport device 12, a support 37 is provided on the right side of the front end of the threshing section transport device 12, extending from the rear end of the transport device 34 to the front end of the handling chamber 50.

As shown in FIG. 6, the rear end of the frame 4A of the harvesting device 4 is provided with a bracket 38C for mounting the front auxiliary clamping rod, and a bracket 38D for mounting the grain rod sensor 34C that detects the deformation of the front auxiliary clamping rod. The front end of the frame 4A is attached to the connecting frame 29A erected on the left side of the harvesting transmission case 29 of the harvesting frame 30, and is inclined upward from the front to the rear, with the rear end facing the upper front of the feed chain 12B.

The front auxiliary clamping rod is composed of an upper auxiliary clamping rod and a lower auxiliary clamping rod made of spring plates or the like. The front end of the upper auxiliary clamping rod is attached to a bracket 38C attached to the end of the frame 4A by a fastening member such as a bolt, and the rear end extends to the start end of the feed chain 12B. The front end of the lower auxiliary clamping rod is attached to a bracket 38C attached to the end of the frame 4A by a fastening member such as a bolt so as to cover the upper auxiliary clamping rod from below, and the rear end extends to the front side of the clamping rod 12C.

The left-right width of the upper and lower auxiliary clamping rods is narrower than the left-right width of the feed chain 12B, and the lower auxiliary clamping rod is placed between the left and right outer plates of the feed chain 12B.

The grain rod sensor 34C is attached to a bracket 38D attached to the end of the frame 4A by a fastening member such as a bolt. It is preferable to install two grain rod sensors 34C, 34C side by side in the front-to-rear direction on the bracket 38D.

The grain stick sensor 34C located at the front detects whether or not there is a grain stick being handed over from the conveying device 34 to the feed chain 12B. That is, if there is a grain stick being handed over from the conveying device 34 to the feed chain 12B, the rear end of the upper auxiliary clamping rod moves upward, and the rear end of the upper auxiliary clamping rod presses against the grain stick sensor 34C located at the front. On the other hand, if there is no grain stick, the rear end of the upper auxiliary clamping rod remains extended to the starting end of the feed chain 12B.

The grain stick sensor 34C located at the rear detects a jam of the grain sticks being handed over from the conveying device 34 to the feed chain 12B. That is, if a grain stick being handed over from the conveying device 34 to the feed chain 12B is jammed at the front of the feed chain 12B, the rear end of the lower auxiliary clamping rod moves upward, and the middle part of the lower auxiliary clamping rod presses the grain stick sensor 34C located at the rear. On the other hand, if there is no jam of grain sticks, the rear end of the lower auxiliary clamping rod remains placed on the upper side of the feed chain 12B. It is particularly preferable to switch the conveying speed of the feed chain 12B according to the output value of the grain stick sensor 34C located at the rear.

The hand-threwing restricting member 40 extends rearward from the end of the conveying path of the harvesting device 4, and a support section supports the front of the hand-threwing restricting member 40 so that it can rotate up and down. The hand-threwing restricting member 40 can be rotated downward to reduce the gap between the rear of the hand-threwing restricting member 40 and the front of the clamping rod 12A, thereby restricting the placement of hand-threwing stalks at the front of the feed chain 12B, and can be rotated upward to increase the gap between the rear of the hand-threwing restricting member 40 and the front of the clamping rod 12A, thereby allowing the placement of hand-threwing stalks at the front of the feed chain 12B.

As shown in Figures 3 to 5, the left suspension base 35 is attached to the upper side of a base 35A that is erected on the machine frame 1. A feed chain pivot shaft 35B is provided at the front left side of the suspension base 35, extending vertically and rotatably supporting the base of a horizontal transmission frame 35C that pivotally supports the left side of the horizontal transmission tube 36.

In order to facilitate maintenance and inspection of the harvesting device 4's equipment, such as the grass dividing rod 31 and the lifting device 32, by rotating the horizontal transmission cylinder 36 around the feed chain rotating shaft 35B, the horizontal transmission frame 35C is formed in an arc shape with a downward convex portion from the base to the tip when viewed from the front. As will be described later, the threshing section transport device 12, which transports the grain stalks, also rotates around the feed chain rotating shaft 35B.

The right suspension stand 35 is attached to the upper side of the base 35A erected on the machine frame 1. A support member 35D that supports the right side of the horizontal transmission tube 36 is attached to the upper end of the suspension stand 35. The support member 35D is composed of a front support member and a rear support member that are divided into an approximately semicircular arc shape. When supporting the right side of the horizontal transmission tube 36, the front and rear support members are engaged, and the horizontal transmission tube 36 is rotated around the feed chain rotation shaft 35B to perform maintenance on the harvesting device 4 or the transmission 65, and when moving the harvesting device 4 to the left, the front and rear support members are disengaged and the horizontal transmission tube 36 is pulled forward. In addition, in order to increase the rigidity of the left and right suspension stands 35, 35 against deformation, etc., a connecting frame 35E is installed in the vertical middle of the left and right suspension stands 35, 35.

The rotation of the engine 62 is transmitted to the hydraulic variable-speed travel device 66 via a pulley 66B supported on the input shaft of the hydraulic variable-speed travel device 66, and the rotation transmitted to the hydraulic variable-speed travel device 66 is transmitted to a pulley 36B supported on the right end of a horizontal transmission shaft 36A mounted inside the horizontal transmission tube 36 via a pulley (not shown) supported on the output shaft of the hydraulic variable-speed travel device 66. The rotation transmitted to the horizontal transmission shaft 36A is transmitted to the lifting device 32, cutting blade device 33, transport device 34, etc. of the harvesting device 4 via a transmission shaft (not shown) mounted inside the post-harvesting frame 28 and the harvesting transmission case 29.

The rotation of the engine 62 is transmitted to the hydraulic variable speed drive 66 via a pulley 66B supported on the input shaft of the hydraulic variable speed drive 66, and the rotation transmitted to the hydraulic variable speed drive 66 is transmitted to the left and right crawlers of the traveling device 2 via a transmission 65.

<Threshing device 3>
As shown in Figure 4, the threshing device 3 has a handling chamber 50 at the upper front part for threshing the stalks, and a sorting chamber 51 below the handling chamber 50 for sorting the threshed grains.

In the handling chamber 50, a handling drum 55 having multiple handling teeth is supported on a handling drum shaft journalled to the front and rear walls 50A and 50C.

A straw supply port 26A is provided at the lower left side of the front wall 50A of the handling chamber 50, a threshing port 26B is provided at the lower left side of the left wall 50B along the threshing body 55, and a straw discharge port 26C is provided at the lower left side of the rear wall 50C.

Also, a threshing section transport device 12 is installed on the left side of the handling chamber 50, which clamps the base of the grain stalk along the threshing mouth 26B and transports it rearward. After threshing is complete and transported by the threshing section transport device 12, the unthreshed grain stalks are handed over to a straw waste transport device 58 installed behind the threshing section transport device 12 and transported further rearward, where they are cut by a pair of straw waste cutters 59 and discharged to the outside.

A swaying sorting device 52 is provided at the top of the sorting chamber 51, and at the bottom of the sorting chamber 51, a first winnower 53A that blows air to the front sieve of the swaying sorting device 52, a first receiving trough 53B that collects grains that leak from the swaying sorting device, a second winnower 53C that blows air to the rear sieve of the swaying sorting device, and a second receiving trough 53D that collects the second grains, which are grains with stem branches and other attached that leak from the swaying sorting device, are installed in this order from the front. The grains collected in the first receiving trough 53B are transferred to the grain tank 5 by the first transfer spiral 53b installed in the first receiving trough 53B, and the grains and other grains collected in the second receiving trough 53D are transferred to the second processing chamber by the second transfer spiral 53d installed in the second receiving trough 53D.

The right rear of the handling chamber 50 is connected to the dust treatment chamber, and inside the dust treatment chamber, a dust treatment body 57 with a screw blade body on its outer periphery is journaled in the front-to-back direction, and a second treatment chamber for treating and reducing the second-class grains is provided at the front of the dust treatment chamber. Inside the second treatment chamber, a second treatment body 56 with intermittent spiral blades on its outer periphery is journaled. In addition, a dust treatment fan 48 is located at the rear upper side of the oscillating sorting shelf to suck in straw chips and other debris generated during threshing and sorting and discharge them outside the machine.

<Threshing section transport device 12>
As shown in Figure 3, the threshing section conveying device 12 has a clamping rod 12A located on the upper side and a feed chain 12B located on the lower side.

The clamping rod 12A is biased toward the feed chain 12B by a biasing means 14 such as a spring against the handling drum cover 50D of the handling chamber 50.

The feed chain 12B is an endless chain that is wound around tensioning wheels 17B, 17B that are rotatably supported at the front and rear ends of the upper chain rail 18A, and a drive sprocket 17A that is provided between the tensioning wheels 17B, 17B.

The working feed chain 12B, which is placed on the upper chain rail 18A, clamps the base of the culm with the clamping rod 12A as it moves from the front to the rear.

A speed control dial 6A is provided on the side of the threshing drum cover 50D to allow the assistant worker performing the hand threshing work to easily adjust the speed of the feed chain 12B during the hand threshing work, thereby improving workability and safety.

In a side view, the clamping rod 12A is provided with a rear upward incline along the threshing mouth 26B from the straw supply port 26A of the handling chamber 50 to the straw discharge port 26C. The upper chain rail 18A on which the working side feed chain 12B is mounted is rear upward incline from the front end in front of the horizontal shaft transmission tube 36, then gently rear upward incline to reach the front of the straw supply port 26A of the handling chamber 50, and then faces the clamping rod 12A and rear upward incline along the threshing mouth 26B from the straw supply port 26A of the handling chamber 50 to the straw discharge port 26C. It then extends horizontally rearward from the straw discharge port 26C, then rear downward incline to reach the rear end behind the front end of the ear tip transport device 34A.

The lower chain rail 18B, on which the non-working feed chain 12B is mounted, is inclined upward from the front end above the counter shaft 71, which transmits the rotation of the engine 62 to the drive sprocket 17A, to the rear end. The rear end of the lower chain rail 18B is located in front of the rear tensioning wheel 17B and below the straw discharge port 26C.

A guide 18D is detachably attached to the front end of the lower chain rail 18B to guide the non-working feed chain 12B to the drive sprocket 17A located below the front end of the lower chain rail 18B. The guide 18D is located above the counter shaft 71 and is formed in an arc shape.

A support frame 19 is provided below the lower chain rail 18B, which supports the upper chain rail 18A and the lower chain rail 18B via a rail connection plate 18C. In other words, the feed chain 12B is supported by the support frame 19. In addition, a straw chip guide plate (not shown) is attached to the connection plate 18E connected to the upper chain rail 18A and the lower chain rail 18B to prevent straw chips that fall from the feed chain 12B during grain stalk transport from falling into the drive section of the sorting chamber 51.

The front end of the support frame 19 is attached to a plate 19A which is attached to a bracket 19B by bolts or the like, and the bracket 19B is rotatably attached to the upper and lower ends of a feed chain rotation shaft 35B provided on the left suspension stand 35. In order to reduce the intrusion of the tip of the feed chain 12B into the inside of the machine body when the feed chain 12B rotates around the feed chain rotation shaft 35B, the feed chain rotation shaft 35B is erected near the rear side of the front tensioning wheel 17B which winds the feed chain 12B.

In order to prevent interference with the feed chain hydraulic continuously variable transmission 10 and the like, the support frame 19 extends rearward from its front end between the input shaft 10A of the feed chain hydraulic continuously variable transmission 10 and the output shaft 68B of the gearbox 68 in a side view, then curves approximately 90 degrees in front of the first variable speed motor and extends upward. Then, after extending upward in front of the countershaft 71, it slopes upward from the underside of the guide 18D along the underside of the lower chain rail 18B, reaching approximately the center of the lower chain rail 18B in the fore-and-aft direction.

As a result, when performing maintenance and inspection of the feed chain 12B, the feed chain hydraulic variable speed device 10, etc., it can be easily performed by rotating the support frame 19 around the feed chain rotating shaft 35B and moving the rear part of the feed chain 12B away from the main body of the threshing device 3. In order to easily perform maintenance and inspection of the feed chain hydraulic variable speed device 10, the feed chain rotating shaft 35B is erected forward of the front part of the feed chain hydraulic variable speed device 10.

In a side view, the front tensioning wheel 17B is provided near the front of the horizontal shaft transmission tube 36 that transmits the rotation of the engine 62 to the harvesting device 4, and the rear tensioning wheel 17B is provided near the rear of the front end of the tip transport device 34A. The drive sprocket 17A is located between the front and rear tensioning wheels 17B, 17B in the front-rear direction and biased toward the front tensioning wheel 17B, and is located approximately in the center of the horizontal shaft transmission tube 36 and the counter shaft 71 that transmits the rotation of the engine 62 to the feed chain 12B. In the up-down direction, it is located approximately in the center of the support frame 19 that extends toward the rear and supports the counter shaft 71 and the lower chain rail 18B, etc. In addition, a tension sprocket 17C is provided between the front tensioning wheel 17B and the drive sprocket 17A.

As a result, the feed chain 12B moves upward from the drive sprocket 17A, then moves along the tension sprocket 17C to the front tensioning wheel 17B, and moves from the front tensioning wheel 17B to the rear tensioning wheel 17B along the upper side of the upper chain rail 18A. The feed chain 12B then moves from the rear tensioning wheel 17B towards the front lower chain rail 18B, then moves from the rear end of the lower chain rail 18B along the upper side of the lower chain rail 18B to the front guide 18D, and then moves along the guide 18D to the drive sprocket 17A.

The rotation of the engine 62 is transmitted to the feed chain hydraulic variable speed device 10 via the countershaft 71, and after being accelerated or decelerated by the gearbox 68, is transmitted to the output shaft 68B, which is connected to the drive sprocket 17A of the threshing section conveying device 12.

The rotation transmitted to the countershaft 71 is transmitted to the handling drum 55 and also to the input shaft 10A of the feed chain hydraulic continuously variable transmission 10.

The rotation transmitted to the input shaft 10A of the feed chain hydraulic continuously variable transmission 10 is transmitted to the gear box 68, where it is accelerated or decelerated by the gears of the gear box 68 and transmitted to the output shaft 68B. The rotation transmitted to the output shaft 68B is transmitted to the drive sprocket 17A of the feed chain 12A.

<Narrow Guide 20>
On the left side of the combine, i.e., on the uncut side, there is provided along the side thereof a narrow guide 20 which can be switched between an extended position in which it extends outward from the combine and a stored position in which it is stored inward, as shown in FIG. 2 .

The narrow guide 20 consists of a front part 20A and a rear part 20B that are indirectly connected, and the front end of the front part 20A is pivotally supported to the front end of the grass division frame on the rear side of the leftmost grass division body 31, and the rear end of the rear part 20B is supported to be movable in the front-rear direction by a support member provided on the left side of the machine frame 1. In addition, the narrow guide 20 can be switched between an extended position and a stored position by a switching means (not shown) equipped with a link structure.

When the mode switch 6B is connected to change from normal reaping mode to hand-threwing mode, the narrow guide 20 is maintained in the stored position to prevent contact between the assistant worker performing the hand-threwing work and the narrow guide 20.

The side of the handling cylinder cover 50D is provided with a speed control dial 6A for increasing or decreasing the speed of the feed chain 12B, a mode switch 6B for switching to manual handling mode, a reverse switch 6C for rotating the feed chain 12B in the opposite direction from the rear to the front, and a stop switch 6D for emergency stopping the drive of the feed chain 12B.

<Cockpit 6>
On the left side of the driver's seat 6, there is a main speed change lever 16 which remotely operates the hydraulic continuously variable transmission 66 for traveling, and behind the main speed change lever 16 is a sub-speed change lever 15 which switches between a stepped sub-speed change device provided in the transmission mechanism within the transmission 65 depending on the lying state of the planted grain stalks, and a harvesting lever 21 which switches the drive of the working parts such as the threshing device 3 and the harvesting device 4 on and off is provided.

<Hand-threshing attachment 80>
A hand-threwing attachment 80 used for hand-threwing work will be described with reference to Figs.

There is a manual threshing operation in which the stalks are cut manually in part of the field so that the reaping can be carried out along the approach route or within the field, and the cut stalks are then manually placed in front of the feed chain 12B of the threshing device 3 for threshing. However, it is difficult to manually bring the stalks close to the driven feed chain 12B without considerable experience, and it is dangerous work as hands and other parts of the body can get caught.

In addition, the amount of straw fed into the feed chain 12B varies depending on the skill of the worker, so if only small amounts are fed in, the work time will be long.

The present invention provides a hand threshing attachment 80 that can easily and safely load stalks onto the feed chain 12B, making hand threshing easy, efficient, and safe.

The hand-cutting attachment 80 is composed of a stay 81, a transport device 82, a drive unit 83, and a gripping arm 84.

The stay 81 is composed of two flat plates 81a and 81b as stay members.
The two flat plates 81a, 81b are provided with long holes 81c, 81c in the longitudinal direction, and bolts are inserted into the long holes 81c, 81c and fixed with nuts. Therefore, the length in the longitudinal direction can be freely adjusted by loosening the nuts and sliding the two flat plates 81a, 81b in the longitudinal direction by the length of the long holes 81c, 81c.

The transport device 82 is composed of two rotating rolls 82b, 82b as transport rotating bodies whose bases are rotatably supported by bearings 82a, 82a on the outer ends of two flat plates 81a, 81b of the stay 81, a transmission belt 82c stretched between the bases of the two rotating rolls 82b, 82b, and a transport flat belt 82d as a transport body stretched between the two rotating rolls 82b, 82b.

The drive unit 83 is configured by pivoting a spur gear 83c and a pulley 83d as an input gear at the tip of a pivot arm 83b having a base support shaft 83a rotatably supported on the flat plate 81a of the stay 81 so that they can rotate together.

A spring is provided to bias the pivot arm 83b around the base support shaft 83a in a direction away from the stay 81 (in the direction of arrow A).

When the spur gear 83c is engaged with the feed chain 12B as described below, it rotates due to the operation of the feed chain 12B, and the rotation of the spur gear 83c rotates the coaxial pulley 83d, which presses against the transmission belt 82c of the transfer device 82 to rotate the transmission belt 82c, which in turn rotates the two rotating rolls 82b, 82b, causing the transfer flat belt 82d to rotate and transfer.

The gripping arm 84 is composed of two L-shaped rods 84a and 84b.

A cylindrical body 84c is fixed to one end of one rod 84a, and one end of the other rod 84b fits into the cylindrical body 84a, so that the two L-shaped rods 84a and 84b form a freely extendable gripping portion 84d.

The other ends 84e, 84e of the two L-shaped rods 84a, 84b are inserted into bearings 82a, 82a provided at the tips of two rotating rolls 82b, 82b whose bases are rotatably supported by bearings 82a, 82a on the stay 81.

Therefore, when the nuts fixing the two flat plates 81a, 81b of the stay 81 are loosened and the two flat plates 81a, 81b are slid longitudinally by the length of the long holes 81c, 81c to adjust the longitudinal length, the distance between the two rotating rolls 82b, 82b is adjusted to tension the flat transport belt 82d, and the nuts are tightened again to fix the two flat plates 81a, 81b. Since the two L-shaped rods 84a, 84b of the gripping arm 84 are the gripping parts 84d that can be stretched and contracted, the tension of the flat transport belt 82d can be appropriately adjusted.

<Hand-threshing operation using hand-threshing attachment 80>
The cover 3a covering the outside of the threshing device 3 is provided with a flat opening/closing cover 3c whose upper edge is pivoted by a front-to-rear pivot shaft 3b below the front end of the feed chain 12B and whose lower edge rotates upward to open.

A fixing mechanism is provided that rotates the openable cover 3c upward to open it and fix it in a horizontal position, and the openable cover 3c that opens outward and is fixed horizontally functions as a platform for placing the hand-cutting attachment 80.

When the opening and closing cover 3c is opened, a storage section is formed inside where the hand-cutting attachment 80 can be stored.

The cover 3a can be attached and detached from the frame of the threshing device 3, but it is fitted with an insertion protrusion 3d at the front that engages with a hole in the frame, and well-known opening and closing engagement handles 3e, 3e at the middle and rear.

In addition, by attaching a rubber mat to the underside of the opening and closing cover 3c and allowing the pivot shaft 3b on the top edge of the opening and closing cover 3c to be inserted and removed freely, the pivot shaft 3b can be removed, the opening and closing cover 3c can be removed, turned over, and the pivot shaft 3b can be reinserted and the opening and closing cover 3c can be attached upside down and fixed horizontally with the opening outwards to form a base. This means that the rubber mat will come into contact with the bottom surface of the hand-cutting attachment 80 on which it is placed, and the hand-cutting attachment 80 will be placed in a stable position, allowing for more appropriate hand-cutting work.

In addition, a sensor is provided to detect when the opening/closing cover 3c is opened outward, and when the sensor detects that the opening/closing cover 3c is opened outward, the control device controls the engine 62 rotation speed to a predetermined low speed suitable for hand threshing, or controls the conveying speed of the threshing section conveying device 12 to a predetermined low speed suitable for hand threshing. This eliminates the need to switch between normal work and hand threshing, and prevents a decrease in work efficiency and accuracy due to forgetting to switch.

The steps for hand-cutting are explained below.

The combine is stopped and the parking brake pedal is depressed to lock it, the harvesting device 4 is lowered until it touches the ground, the narrow guide 20 is moved from the extended position to a stored position inside the machine body, the hand-threwing restricting member 40 is rotated upward to switch to a non-restricted state in which hand-threwed straw can be placed in front of the feed chain 12B, the opening and closing cover 3c of the cover 3a is rotated upward to open it and fixed in a horizontal position, and the threshing device 3, harvesting device 4, and other working parts are driven by the reaping lever 21.

At this time, the speed control dial 6A on the side of the threshing drum cover 50D is operated to adjust the speed of the feed chain 12B so that the worker performing the hand threshing work can perform the work appropriately.

Then, the worker stands near the front of the combine's feed chain 12B, grasps the gripping portion 84d of the hand-threwing attachment 80, places it on the horizontally opened and closed cover 3c, and engages the spur gear 83c of the hand-threwing attachment 80 with the feed chain 12B.

Then, the pulley 83d rotates due to the operation of the feed chain 12B, the rotation of the pulley 83d rotates the transmission belt 82c, and the rotation of the two rotating rolls 82b, 82b causes the transfer flat belt 82d to rotate and transfer.

The worker then picks up the stalks and places them on the flat transport belt 82d of the hand threshing attachment 80. The stalks are then transported by the flat transport belt 82d to the front end of the feed chain 12B, where the base of the stalk is clamped by the feed chain 12B and the clamping rod 12A and transported into the threshing device 3 for threshing.

Therefore, when threshing is performed using the threshing attachment 80, the stalks can be easily and safely loaded onto the feed chain 12B, making threshing easy, efficient, and safe.

In addition, by engaging the flat gear 83c of the drive unit 83 of the hand threshing attachment 80 with the feed chain 12B, the flat transport belt 82d can be driven in accordance with the conveying speed of the feed chain 12B while obtaining a driving force, which prevents the occurrence of clogging of the stalks and enables stable threshing.

In addition, instead of placing the hand-threwing attachment 80 on the horizontally opened/closed cover 3c, a hanging part that engages with the hand-threwing restricting member 40 can be provided on the stay 81 of the hand-threwing attachment 80, and with the hanging part engaged with the hand-threwing restricting member 40, the flat gear 83c can be engaged with the feed chain 12B to rotate the transport flat belt 82d and perform the hand-threwing operation.

<Other embodiments>
FIG. 11 is a perspective view showing another embodiment of the hand-threwing attachment 80. As shown in FIG.

An electric motor 90 is provided as the drive unit 83 to drive the transport device 82.

The electric motor 90 is equipped with a battery, and its drive shaft drives and rotates the rotating roll 82b, which causes the flat transport belt 82d of the transport device 82 to rotate and transport.

The electric motor 90 is turned on and off by a motor drive switch 91 provided on the grip portion 84d.

To use the attachment for hand-threwing, the handle 84d of the hand-threwing attachment 80 is grasped and placed on the horizontally opened and closed cover 3c, and the electric motor 90 is driven by the motor drive switch 91, causing the flat transport belt 82d to rotate and transport.

The worker then picks up the stalks and places them on the flat transport belt 82d of the hand threshing attachment 80. The stalks are then transported by the flat transport belt 82d to the front end of the feed chain 12B, where the base of the stalk is clamped by the feed chain 12B and the clamping rod 12A and transported into the threshing device 3 for threshing.

3 Threshing device 3a Cover 3c Opening/closing cover 4 Harvesting device 12 Threshing section transport device 62 Engine 80 Hand threshing attachment 81 Stay 81a Stay member (flat plate)
81b Stay member (flat plate)
82 Transfer device 82b Conveying rotating body (rotating roll)
82c Transmission belt 82d Transport body (transport flat belt)
83 Drive unit 83b Rotating arm 83c Input gear (spur gear)
83d Pulley 84 Grip arm 90 Electric motor 91 Motor drive switch

Claims (2)

The combine harvester is provided with a threshing section transport device (12) that takes over the culms transported from the harvesting device (4) and transports the culms to the threshing device (3). The combine harvester is equipped with a manual threshing attachment (80) that is composed of a transport device (82) that places the culms on the culms and transports them, and a drive unit (83) that is connected to the threshing section transport device (12) and puts the transport device (82) into a transport operation state .
An opening/closing cover (3c) that can be opened and closed outward is provided at a lower position of the front end of the threshing section conveying device (12) of the cover (3a) covering the side of the threshing device (3);
The hand-threwing attachment (80) has a flat belt (82d) for transporting,
This combine harvester is characterized in that the stalks placed on the transport flat belt (82d) of the hand-threshing attachment (80) on the horizontal opening/closing cover (3c) which is open outward are transported to the threshing section transport device (12) . A combine harvester as described in claim 1, characterized in that a sensor is provided to detect when the opening/closing cover (3c) is opened outward, and when the sensor detects that the opening/closing cover (3c) is opened outward, the control device controls the rotation speed of the engine (62) to a predetermined low speed suitable for hand threshing work, or controls the conveying speed of the threshing section conveying device (12) to a predetermined low speed suitable for hand threshing work.