combine

Abstract

To provide a combine harvester that can easily and safely perform threshing work with good workability by providing a threshing work attachment capable of easily and safely supplying grain culms to a threshing part conveying device of a thresher, in view of the fact that there is threshing work of manually reaping grain culms in a part of a field so that reaping travel can be performed in the field, and manually mounting reaped grain culms on a front part of a feed chain so as to perform threshing, but it is difficult without experience to manually make grain culms close to the feed chain during operation, and the work is so dangerous to cause the hand to be caught.SOLUTION: A combine harvester provided with a threshing part conveying device for relaying grain culms conveyed from a reaping device and conveying grain culms to a thresher is equipped with a threshing work attachment 80 which is composed of a transfer device 82 for mounting and transferring grain culms, and a drive part 83 for connecting the transfer device 82 to the threshing part conveying device to put it in a transfer operation state.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a combine harvester equipped with a threshing section transport device that supplies grain stalks harvested by a harvesting device to a threshing device. [Background technology]

[0002] There is a manual threshing operation in which stalks are manually cut from part of a field so that reaping travel can be carried out along an access route or within the field, and the cut stalks are then manually placed in front of the feed chain of a threshing device for threshing (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-046865 A Summary of the Invention [Problem to be solved by the invention]

[0004] Manually moving the stalks close to the moving feed chain is difficult without a great deal of experience, and is a dangerous task in which hands and other body parts can get caught.

[0005] In addition, the amount of straw fed into the feed chain varies depending on the skill of the worker, so if only small amounts are fed in at a time, the work will take a long time.

[0006] Therefore, the present invention provides a hand-threshing attachment that can easily and safely supply stalks to the threshing section conveying device of the threshing device, and provides a combine that enables hand-threshing work to be performed easily, efficiently, and safely. [Means for solving the problem]

[0007] The first invention relates to a combine harvester having 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) that covers the side of the threshing device (3), The hand-cutting 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). The second invention is a combine harvester according to the first invention, characterized in that a sensor is provided for detecting that 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, or controls the conveying speed of the threshing section conveying device (12) to a predetermined low speed suitable for hand threshing. The first invention related to the present invention is a combine harvester provided with a threshing section transporting device 12 which takes over the stew transported from the harvesting device 4 and transports the stew to the threshing device 3, and which is equipped with a manual threshing attachment 80 which is composed of a transporting device 82 on which the stew is placed and transported, and a drive unit 83 which is connected to the threshing section transporting device 12 and puts the transporting device 82 into a transport operating state.

[0008] The first invention related to the present invention According to the 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 operating state.Therefore, by placing the stalks on the manual threshing attachment 80 from the side away from the threshing section transport device 12, the worker does not need to approach the threshing section transport device 12 with his or her hands, and the manual threshing operation can be performed easily, efficiently and safely.

[0009] Second Invention Related to the Present Invention The transport device 82 of the hand-pulling attachment 80 is configured by winding a transmission belt 82c and a transport body 82d around a pair of transport rotating bodies 82b, 82b rotatably mounted on a stay 81, and the drive unit 83 is configured 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. The first invention related to the present invention It is a combine harvester.

[0010] Second Invention Related to the Present Invention According to The first invention related to the present inventionIn addition to the effect achieved by this, 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 freely as one unit.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, which prevents the occurrence of straw clogging and enables threshing to be performed stably.

[0011] The third invention related to the present invention The transport device 82 of the hand-cutting attachment 80 is configured by winding a transmission belt 82c and a transport body 82d around a pair of transport rotors 82b, 82b 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. The first invention related to the present invention It is a combine harvester.

[0012] The third invention related to the present invention According to The first invention related to the present invention In addition to the effect achieved by the above, the transport device 82 of the manual threshing attachment 80 is constructed by wrapping a transmission belt 82c and a transport body 82d around a pair of transport 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 transport 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, thereby ensuring the safety of the work.

[0013] The fourth invention related to the present invention The stay 81 is formed by connecting a plurality of stay members 81a, 81b in a telescopic manner, and the end of a telescopic gripping arm 84 is attached to the end of a pair of conveying rotors 82b, 82b rotatably provided on the stay 81. The second or third invention related to the present inventionIt is a combine harvester.

[0014] The fourth invention related to the present invention According to The second or third invention related to the present invention In addition to the effect of vinegar The tape 81 connects multiple stay members 81a, 81b in a telescopic manner, and the end of an telescopic holding arm 84 is attached to the end of a pair of conveying rotors 82b, 82b that are rotatably mounted on the stay 81.The tension of the conveying body 82d can be adjusted by changing the distance between the pair of conveying rotors 82b, 82b, preventing a situation in which slack in the conveying body 82d makes it difficult to transport the stalks to the threshing section conveying device 12.

[0015] Fifth Invention Related to the Present Invention A 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 that covers the side surface of the threshing device 3, and a fixing mechanism is provided for opening and fixing the cover 3c in a horizontal state. The cover 3c that is opened outward and fixed in a horizontal state is used as a mounting base for the hand threshing attachment 80, and the inside of the cover 3c is used as a storage section for the hand threshing attachment 80. The first invention related to the present invention It is a combine harvester.

[0016] Fifth Invention Related to the Present Invention According to The first invention related to the present invention In addition to the effect described above, 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, and a fixing mechanism is provided for opening the opening / closing cover 3c and fixing it in a horizontal position.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 opening / closing cover 3c fixed horizontally, allowing hand-threshing operation to be performed safely and with good workability.

[0017] In addition, the inside of the opening / closing cover 3c is used as a storage section for the hand-throwing attachment 80, so that the hand-throwing attachment 80 can be stored inside the opening / closing cover 3c, preventing the hand-throwing attachment 80 from being forgotten to be brought into the field.

[0018] The sixth invention related to the present inventionA sensor is provided to detect when the openable cover 3c is opened outward, and when the sensor detects that the openable 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, or controls the conveying speed of the threshing section conveying device 12 to a predetermined low speed suitable for hand threshing. Fifth Invention Related to the Present Invention It is a combine harvester.

[0019] The sixth invention related to the present invention According to Fifth Invention Related to the Present Invention In addition to the effect achieved by this, 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 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. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a side view of a combine harvester according to an embodiment of the present invention. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a side view of a main part of the threshing device of the combine harvester. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. 2 is an oblique view of the threshing section conveying device. [Figure 7] FIG. 2 is a plan view of the hand-threshing attachment of the combine harvester. [Figure 8] FIG. [Figure 9] FIG. 2 is a perspective view of a main part of the hand-threading attachment. [Figure 10] FIG. 2 is an exploded perspective view of the main parts of the hand-threading attachment. [Figure 11]FIG. 4 is a perspective view showing another embodiment of the hand threshing attachment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] A combine harvester according to an embodiment of the present invention will be described in detail below with reference to the drawings.

[0022] For ease of understanding, the following description will refer 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 terms.

[0023] <Overall composition> As shown in Figures 1 and 2, a 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 a 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 reaping device 4 for harvesting grain stalks in the field is provided in front of the threshing device 3.

[0024] The grains threshed and sorted by the threshing device 3 are stored in a grain tank 5 provided on the right side of the threshing device 3, and the stored grains are discharged to the outside through a discharge pipe 7.

[0025] A cockpit 6 in which a 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.

[0026] <Reaping 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.

[0027] The base of the post-cutting frame 28 is attached to a portion biased to the right side of a horizontal transmission tube 36 which is rotatably supported on the upper portions of a pair of left and right suspension bases 35, 35 which are erected on the machine frame 1.

[0028] The harvesting device 4 is equipped with a grass dividing rod 31 located at the front lower part for dividing the planted culms, a lifting device 32 located behind the grass dividing rod 31 for raising up fallen planted culms, a cutting blade device 33 located at the lower rear part of the lifting device 32 for cutting the base of the planted culms, and a transport device 34 located behind the lifting device 32 and the cutting blade device 33 for transporting the harvested culms toward the threshing section transport device 12 located on one side of the threshing device 3.

[0029] The conveying device 34 is composed of a base conveying device 34A that conveys the base side of the harvested stalks, and a tip conveying device 34B that conveys the tip side.In order to prevent the stalks from falling when they are handed over from the conveying device 34 to the threshing section conveying device 12, a support body 37 is provided on the right side of the front end of the threshing section conveying device 12, extending from the rear end of the conveying device 34 to the front end of the handling chamber 50.

[0030] 6, a bracket 38C for mounting the front auxiliary clamping rod and a bracket 38D for mounting a grain rod sensor 34C for detecting the deformation amount of the front auxiliary clamping rod are provided at the rear end of the frame 4A of the reaping device 4. The front end of the frame 4A is attached to a connecting frame 29A erected on the left side of the reaping transmission case 29 of the reaping frame 30, and is inclined upward from the front to the rear, with the rear end facing the upper front side of the feed chain 12B.

[0031] The front auxiliary clamping rod is composed of an upper auxiliary clamping rod and a lower auxiliary clamping rod made of a spring plate or the like. The front end of the upper auxiliary clamping rod is attached by a fastening member such as a bolt to a bracket 38C attached to the end of the frame 4A, 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 by a fastening member such as a bolt to a bracket 38C attached to the end of the frame 4A 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.

[0032] In addition, the left-right width of the upper auxiliary clamping rod and the lower auxiliary clamping rod is formed to be 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.

[0033] 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 that the two grain rod sensors 34C, 34C are arranged side by side in the front-rear direction on the bracket 38D.

[0034] The grain rod sensor 34C located at the front detects whether or not there is a grain rod being handed over from the conveying device 34 to the feed chain 12B. That is, when there is a grain rod 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 presses the grain rod sensor 34C located at the front. On the other hand, when there is no grain rod, the rear end of the upper auxiliary clamping rod remains extended to the starting end of the feed chain 12B.

[0035] The grain stick sensor 34C located at the rear detects a jam of the grain sticks handed over from the conveying device 34 to the feed chain 12B. That is, when a grain stick handed over from the conveying device 34 to the feed chain 12B jams 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, when 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.

[0036] In addition, a hand-threwing regulating member 40 is extended rearward from the conveying end side of the harvesting device 4, and a support portion is provided which supports the front part of the hand-threwing regulating member 40 so that it can be freely rotated up and down.The hand-threwing regulating member 40 can be rotated downward to reduce the gap between the rear part of the hand-threwing regulating member 40 and the front part of the clamping rod 12A, thereby restricting the placing of hand-threwing stalks at the front part of the feed chain 12B, and the hand-threwing regulating member 40 can be rotated upward to increase the gap between the rear part of the hand-threwing regulating member 40 and the front part of the clamping rod 12A, thereby allowing the placing of hand-threwing stalks at the front part of the feed chain 12B.

[0037] 3 to 5, the left suspension base 35 is attached to the upper side of a base 35A erected on the machine body frame 1. A feed chain rotation shaft 35B extending in the vertical direction is provided at the front left side of the suspension base 35 to rotatably support the base of a horizontal transmission frame 35C which pivotally supports the left side of the horizontal transmission cylinder 36.

[0038] In addition, in order to easily perform maintenance and inspection work on the devices such as the grass dividing rod 31 and the lifting device 32 of the harvesting device 4 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 having 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 that transports the grain stalks also rotates around the feed chain rotating shaft 35B.

[0039] The right suspension stand 35 is attached to the upper side of a base 35A erected on the machine frame 1. A support member 35D that pivotally 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 a substantially semicircular arc shape. When the right side of the horizontal transmission tube 36 is pivotally supported, the front and rear support members are engaged, and the horizontal transmission tube 36 is rotated about the feed chain rotation shaft 35B to perform maintenance on the mowing device 4 or the transmission 65, and when the mowing device 4 is moved leftward, the front and rear support members are disengaged and the horizontal transmission tube 36 is pulled out forward. In addition, in order to increase the rigidity of the left and right suspension stands 35, 35 against deformation and the like, a connecting frame 35E is installed at the vertical intermediate portion of the left and right suspension stands 35, 35.

[0040] The rotation of the engine 62 is transmitted to the traveling hydraulic continuously variable speed device 66 via a pulley 66B supported on the input shaft of the traveling hydraulic continuously variable speed device 66, and the rotation transmitted to the traveling hydraulic continuously variable speed device 66 is transmitted to a pulley 36B supported on the right end of a horizontal transmission shaft 36A mounted in the horizontal transmission cylinder 36 via a pulley (not shown) supported on the output shaft of the traveling hydraulic continuously variable speed device 66. The rotation transmitted to the horizontal transmission shaft 36A is transmitted to the lifting device 32, the cutting blade device 33, the transport device 34, etc. of the cutting device 4 via a transmission shaft (not shown) mounted in the post-cutting frame 28 and the cutting transmission case 29.

[0041] In addition, the rotation of the engine 62 is transmitted to the traveling hydraulic continuously variable transmission 66 via a pulley 66B supported on the input shaft of the traveling hydraulic continuously variable transmission 66, and the rotation transmitted to the traveling hydraulic continuously variable transmission 66 is transmitted to the left and right crawlers of the traveling device 2 via a transmission 65.

[0042] <Threshing Machine 3> As shown in FIG. 4, the threshing device 3 has a threshing chamber 50 at the upper front side for threshing the stalks, and a sorting chamber 51 below the threshing chamber 50 for sorting the threshed grains.

[0043] In the handling chamber 50, a handling drum 55 having a plurality of handling teeth is supported by a handling drum shaft journalled to the front and rear walls 50A, 50C.

[0044] A straw supply port 26A is opened in the lower left part of the front wall 50A of the handling chamber 50, a threshing port 26B is opened along the threshing body 55 in the lower part of the left wall 50B, and a straw discharge port 26C is opened in the lower left part of the rear wall 50C.

[0045] In addition, a threshing section transport device 12 is installed parallel to the left side of the handling chamber 50, which clamps the base of the grain stalks along the threshing mouth 26B and transports them rearward.The straw-removed grain stalks that have been threshed and transported by the threshing section transport device 12 are handed over to a straw removal transport device 58 provided behind the threshing section transport device 12 and transported further rearward, after which they are cut by a pair of straw removal cutters 59 and discharged to the outside.

[0046] A oscillating sorting device 52 is provided at the top of the sorting chamber 51, and a first winnower 53A for blowing air to the sieve at the front of the oscillating sorting device 52, a first receiving trough 53B for collecting grains that drop from the oscillating sorting device, a second winnower 53C for blowing air to the sieve at the rear of the oscillating sorting device, and a second receiving trough 53D for collecting second grains, which are grains with stalks and the like attached that drop from the oscillating sorting device, are provided in this order from the front to the bottom of the sorting chamber 51. 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 the like 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.

[0047] The right rear of the handling chamber 50 is connected to the dust discharge treatment chamber, and inside the dust discharge treatment chamber, a dust discharge treatment body 57 with a screw blade body on its outer periphery is journalled in the front-rear direction, and a second treatment chamber for treating and returning the second grain is provided at the front of the dust discharge treatment chamber. Inside the second treatment chamber, a second treatment body 56 with intermittent spiral blades on its outer periphery is journalled. In addition, a dust discharge fan 48 is arranged above and behind the oscillating sorting shelf to suck in straw chips and the like generated during threshing and sorting and discharge them outside the machine.

[0048] <Threshing section transport device 12> As shown in FIG. 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.

[0049] The clamping rod 12A is biased toward the feed chain 12B by a biasing means 14 such as a spring against a handling cylinder cover 50D of the handling chamber 50.

[0050] The feed chain 12B is an endless chain that is wound around and driven by 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.

[0051] The feed chain 12B on the working side, 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.

[0052] A speed adjusting dial 6A is provided on the side of the threshing drum cover 50D so that an assistant worker performing the manual threshing operation can easily adjust the speed of the feed chain 12B during the manual threshing operation, thereby improving workability and safety.

[0053] 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. After that, it 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 conveying device 34A.

[0054] The lower chain rail 18B, on which the non-working feed chain 12B is carried, slopes upward at the rear from its front end above the counter shaft 71, which transmits the rotation of the engine 62 to the drive sprocket 17A, to its 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.

[0055] 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.

[0056] A support frame 19 that supports the upper chain rail 18A and the lower chain rail 18B by a rail connecting plate 18C is provided below the lower chain rail 18B. 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 connecting plate 18E that connects 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.

[0057] The front end of the support frame 19 is attached to a plate 19A which is attached to a bracket 19B with bolts or the like, and the bracket 19B is rotatably attached to the upper and lower ends of a feed chain rotating shaft 35B provided on the left suspension base 35. Note that 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 rotating shaft 35B, the feed chain rotating shaft 35B is erected near the rear side of the front tensioning wheel 17B that winds the feed chain 12B.

[0058] 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 gear box 68 in a side view, then curves approximately 90 degrees in front of the first variable speed motor and extends upward. After extending upward in front of the counter shaft 71, it inclines upward at the rear from below 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-aft direction.

[0059] As a result, when maintenance and inspection of the feed chain 12B, the hydraulic continuously variable speed device 10 for the feed chain, etc. is performed, it can be easily performed by rotating the support frame 19 about the feed chain rotating shaft 35B and separating the rear part of the feed chain 12B from the main body of the threshing device 3. Note that, in order to easily perform maintenance and inspection of the hydraulic continuously variable speed device 10 for the feed chain, the feed chain rotating shaft 35B is erected forward of the front part of the hydraulic continuously variable speed device 10 for the feed chain.

[0060] 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 disposed 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 addition, in the up-down direction, it is located approximately in the center of the counter shaft 71 and the support frame 19 that extends toward the rear and supports the lower chain rail 18B, etc. A tension sprocket 17C is provided between the front tensioning wheel 17B and the drive sprocket 17A.

[0061] 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 along the upper side of the upper chain rail 18A toward the rear tensioning wheel 17B. The feed chain 12B then moves from the rear tensioning wheel 17B toward 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.

[0062] The rotation of the engine 62 is transmitted to the hydraulic continuously variable transmission 10 for the feed chain via the counter shaft 71, and after being accelerated or decelerated in the gear box 68, is transmitted to the output shaft 68B connected to the drive sprocket 17A of the threshing section conveying device 12.

[0063] The rotation transmitted to the counter shaft 71 is transmitted to the handling drum 55 and also to the input shaft 10A of the hydraulic continuously variable transmission 10 for feed chain.

[0064] The rotation transmitted to the input shaft 10A of the feed chain hydraulic continuously variable transmission 10 is transmitted to the gear box 68, and is then accelerated or decelerated by the gears of the gear box 68 before being 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.

[0065] <Narrow Guide 20> On the left side of the combine, which is the uncut side, there is provided a narrow guide 20 along the side that can be switched between an extended position that extends outward from the combine and a stored position that is stored inside, as shown in Figure 2.

[0066] The narrow guide 20 is composed of a front side part 20A and a rear side part 20B which are indirectly connected, and the front end part of the front side part 20A is pivotally supported to the front end part of the rear grass division frame of the leftmost grass division body 31 so as to be freely rotatable, and the rear end part of the rear side part 20B is supported to be freely movable in the front-rear direction by a support member provided on the left side part of the machine frame 1. In addition, the narrow guide 20 is switched between the extended posture and the stored posture by a switching means (not shown) equipped with a link structure.

[0067] When the mode switch 6B is connected to change from the normal reaping mode to the hand threshing mode, the narrow guide 20 is maintained in the stored position to prevent contact between the assistant worker performing the hand threshing work and the narrow guide 20.

[0068] In addition, on the side of the handling drum cover 50D, there are provided 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.

[0069] <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 an auxiliary speed change lever 15 which switches the stepped auxiliary speed change device provided in the transmission mechanism within the transmission 65 depending on the lying state of the planted grain stalks, and there is a harvesting and reaping lever 21 which switches the drive of the working parts such as the threshing device 3 and the harvesting device 4 on and off.

[0070] <Hand-operated attachment 80> A hand-threwing attachment 80 used for hand-threwing work will be described with reference to Figs. 7 to 10.

[0071] There is a method of manually cutting the stalks in part of the field so that the stalks can be cut along the access route or within the field, and then the cut stalks are placed manually on the front of the feed chain 12B of the threshing device 3 for threshing. However, manually moving the stalks close to the driven feed chain 12B is difficult without considerable experience, and is also a dangerous task in which hands and other body parts can get caught.

[0072] In addition, the amount of straw fed into the feed chain 12B also varies depending on the skill of the worker, so if only small amounts are fed in at a time, the work time will be long.

[0073] Therefore, the present invention provides a hand threshing attachment 80 that can easily and safely load the stalks onto the feed chain 12B, thereby making hand threshing easy, efficient and safe.

[0074] The hand-cutting attachment 80 is composed of a stay 81, a transport device 82, a drive unit 83 and a gripping arm 84.

[0075] 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.

[0076] The transfer device 82 is composed of two conveying rotating bodies, namely, rotating rolls 82b, 82b, 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 transfer flat belt 82d, which serves as a transfer body, stretched between the two rotating rolls 82b, 82b.

[0077] The driving portion 83 is configured by pivoting a spur gear 83c as an input gear and a pulley 83d at the tip of a rotating arm 83b having a base support shaft 83a rotatably supported on a flat plate 81a of the stay 81 so as to be integrally rotatable with each other.

[0078] A spring is provided to bias the pivot arm 83b to pivot about the base support shaft 83a in a direction away from the stay 81 (in the direction of the arrow A).

[0079] 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 then presses against the transmission belt 82c of the transfer device 82 to drive and rotate the transmission belt 82c, thereby rotating the two rotating rolls 82b, 82b and causing the transfer flat belt 82d to rotate for transfer.

[0080] The gripping arm 84 is composed of two L-shaped rods 84a and 84b.

[0081] A cylindrical body 84c is fixed to one end of one rod 84a, and one end of the other rod 84b is fitted into the cylindrical body 84a, so that the two L-shaped rods 84a, 84b form a freely extendable grip portion 84d.

[0082] 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.

[0083] 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 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 transport flat belt 82d, and the nuts are tightened again to fix the two flat plates 81a, 81b, the two L-shaped rods 84a, 84b of the gripping arm 84 form an expandable gripping portion 84d, so that the tension of the transport flat belt 82d can be appropriately adjusted.

[0084] <Hand-threwing work using the hand-threwing work 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 on a front-to-rear pivot shaft 3b below the front end of the feed chain 12B and whose lower edge rotates upward to open.

[0085] A fixing mechanism is provided which rotates the open-close cover 3c upward to open it and fix it in a horizontal position, and the open-close cover 3c which is opened outward and fixed in a horizontal position functions as a platform for placing the hand-cutting attachment 80.

[0086] When the openable cover 3c is opened, a storage section is formed inside, in which a hand-operated attachment 80 can be stored.

[0087] In addition, the cover 3a can be freely attached and detached from the frame of the threshing device 3, and is attached by providing an insertion protrusion 3d at the front to engage with a hole provided in the frame, and by providing well-known opening and closing engagement handles 3e, 3e at the middle and rear parts.

[0088] Furthermore, by attaching a rubber mat to the underside of the opening-closing cover 3c and making the pivot shaft 3b on the top edge of the opening-closing cover 3c removable and insertable, the pivot shaft 3b can be removed by removing the opening-closing cover 3c, turning it over, and then reinserting the pivot shaft 3b and attaching the opening-closing cover 3c upside down, and then fixing it horizontally with the opening outward to serve as a base, the rubber mat will come into contact with the bottom surface of the hand-handling attachment 80 on which it is placed, so that the hand-handling attachment 80 can be placed stably, allowing for more appropriate hand-handling work to be performed.

[0089] 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 rotation speed of the engine 62 to a predetermined low rotation 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, eliminating the need to switch between normal operation and hand threshing operation and preventing a decrease in work efficiency and accuracy due to forgetting to switch.

[0090] The procedure for manual cutting is described below.

[0091] The combine is stopped and the parking brake pedal is depressed to lock it, the harvesting device 4 is lowered until it touches the field, the narrow guide 20 is moved from its 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-threshed 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 harvesting lever 21.

[0092] At this time, the speed adjusting 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 manual threshing operation can perform the manual threshing operation appropriately.

[0093] Then, the worker stands near the front of the combine's feed chain 12B, grasps the handle 84d of the hand-threading attachment 80, places it on the horizontally opened / closed cover 3c, and engages the spur gear 83c of the hand-threading attachment 80 with the feed chain 12B.

[0094] Then, the pulley 83d is rotated by the operation of the feed chain 12B, the transmission belt 82c is rotated by the rotation of the pulley 83d, and the flat transfer belt 82d is rotated for transfer by the rotation of the two rotating rolls 82b, 82b.

[0095] The worker then picks up the stalk and places it on the flat transport belt 82d of the hand-threshing attachment 80, and the stalk is 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.

[0096] Therefore, when threshing is performed using the threshing attachment 80, the stalks can be easily and safely loaded onto the feed chain 12B, making the threshing easy, efficient and safe.

[0097] In addition, by engaging the flat gear 83c of the drive section 83 of the hand threshing attachment 80 with the feed chain 12B, the transport flat belt 82d can be driven in accordance with the conveying speed of the feed chain 12B while obtaining a driving force, thereby preventing the occurrence of clogging of the straw and enabling threshing to be carried out stably.

[0098] Instead of placing the hand-threading attachment 80 on the horizontal open-close cover 3c, a hanging portion that engages with the hand-threading regulating member 40 may be provided on the stay 81 of the hand-threading attachment 80, and with the hanging portion engaged with the hand-threading regulating member 40, the flat gear 83c may be engaged with the feed chain 12B to rotate the transport flat belt 82d for transporting and performing the hand-threading operation.

[0099] <Other embodiments> FIG. 11 is a perspective view showing another embodiment of the hand-threwing attachment 80. As shown in FIG.

[0100] As a driving means for the transport device 82, an electric motor 90 is provided as a driving unit 83.

[0101] The electric motor 90 is equipped with a battery, and the drive shaft thereof drives and rotates the rotating roll 82b, whereby the flat transport belt 82d of the transport device 82 rotates and transports.

[0102] The electric motor 90 is turned on and off by a motor drive switch 91 provided on the grip portion 84d.

[0103] To use the attachment for hand-threwing work, the handle 84d of the hand-threwing attachment 80 is grasped and placed on the horizontally opened / closed cover 3c, and the electric motor 90 is driven by the motor drive switch 91, causing the transport flat belt 82d to rotate for transport.

[0104] The worker then picks up the stalk and places it on the flat transport belt 82d of the hand-threshing attachment 80, and the stalk is 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. [Explanation of symbols]

[0105] 3. Threshing equipment 3a Cover 3c Opening and closing cover 4 Reaping 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 Rotating conveyor (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 Grasping Arm 90 Electric Motor 91 Motor Drive Switch

Claims

1. 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).

2. 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.

Images