combine

Abstract

To provide a combine capable of speedily attaching and detaching a raising device installed in the middle of a longitudinal direction of a transmission cylinder, securing a large work space in front of a carrier device, and easily removing cereal stems clogged in the carrier device.SOLUTION: One or more raising frames 40 are provided in the middle part of a first transmission cylinder. The raising frame 40 is formed by a vertical transmission cylinder 41 extending downward from the first transmission cylinder and a horizontal transmission cylinder 42 extending from a lower part of the vertical transmission cylinder 41 in the horizontal direction. Back and forth frames extending from a second transmission cylinder to a grass divider are provided at a prescribed interval in the horizontal direction. One or mo stays 43 extending upward from the middle part of a frame 23 and a right and left frame 44 extending from upper parts of the stays 43 in the horizontal direction are provided in the middle part of the frame 23 connecting the middle parts of the back and forth frames. A shaft center extending in the vertical direction of the upper and lower transmission cylinder 41 is shifted from the center in the horizontal direction of a pair of right and left raising devices freely removably fixed to the right and left frames 44 and the right and left transmission cylinders 42.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a combine harvester having a plurality of lifting devices in a harvesting device. [Background technology]

[0002] A known technique involves connecting a transmission tube extending in the left-right direction provided on the top of the harvesting device with a pair of lifting devices provided in the middle in the left-right direction by a frame extending in the up-down direction, and when stalks become stuck in the transport device provided behind the lifting devices, the lifting devices are rotated around the axis of the transmission tube via the frame to remove the stalks stuck in the transport device (see Patent Document 1).

[0003] A known technology involves connecting a transmission tube extending in the left-right direction provided at the top of the harvesting device with the tops of a pair of lifting devices provided in the middle in the left-right direction by a link formed of two arms, and when stalks become stuck in the transport device provided behind the lifting devices, the link is extended forward to pull out the lifting devices forward and remove the stalks stuck in the transport device (see Patent Document 2).

[0004] A known technique involves fixing a transmission tube extending in the left-right direction provided on the top of the harvesting device and the upper parts of a pair of lifting devices provided in the middle in the left-right direction to a vertically extending support shaft, and when stalks become stuck in the transport device provided behind the lifting devices, the pair of lifting devices rotate around the axis of the support shaft to remove the stalks stuck in the transport device (see Patent Document 3).

[0005] A known technology is to rotatably mount a transmission tube extending left and right on the top of the harvesting device and a lifting device located in the middle in the left and right direction to a vertically extending shaft, and when stalks become stuck in the transport device located behind the lifting device, the left part of the left lifting device is rotated forward around the axis of the left support shaft, and the right part of the right lifting device is rotated forward around the axis of the right support shaft to remove the stalks stuck in the transport device (see Patent Document 4). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2007-37441 A [Patent Document 2] JP 2012-29568 A [Patent Document 3] JP 2012-139118 A [Patent Document 4] JP 2013-99301 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, the technology of Patent Document 1 had the problem that the pair of left and right lifting devices needed to be rotated around the axis of the transmission cylinder via the frame to lift up the lower part of the lifting devices, which lengthened the work time.

[0008] In addition, the techniques of Patent Documents 2 to 4 do not allow for a large working space to be secured in front of the conveying device of the harvesting equipment, which limits the working posture and makes it difficult to easily remove stalks that have become stuck in the conveying device.

[0009] Therefore, the object of the present invention is to provide a combine harvester that can quickly attach and detach a lifting device located halfway between the transmission cylinder and the left-right direction, ensures a large working space in front of the conveying device, and allows for easy removal of grain stalks that are stuck in the conveying device.

[0010] The present invention which has solved the above problems is as follows. That is, the invention described in claim 1 is a combine harvester in which a harvesting device (3) is provided in front of a machine frame (1) on which an engine is mounted, and a threshing device (4) is provided behind the harvesting device (3), A harvesting frame (10) of the harvesting device (3) is provided with a harvesting body (16) for harvesting culms, a lifting device (17, 70) for lifting the harvested culms, a cutting blade device (18) for cutting the base of the lifted culms, and a conveying device (19) for clamping the cut culms and conveying them to the threshing device (4). At least one lifting frame (40) is provided in the middle of a first transmission tube (15) extending in the left-right direction and disposed at the upper part of the harvesting frame (10). The lifting frame (40) is formed of an upper and lower transmission tube (41) extending downward from the first transmission tube (15) and a left-right transmission tube (42) extending in the left-right direction from the lower part of the upper and lower transmission tubes (41). This combine harvester is characterized in that front and rear frames (22) extending from a second transmission tube (13) extending in the left-right direction toward the grass body (16) are arranged at a predetermined interval in the left-right direction, and at least one stay (43) extending upward from the middle part of a frame (23) extending in the left-right direction connecting the middle parts of the front and rear frames (22) is provided in the middle part of the frame (23) and a left and right frame (44) extending in the left-right direction from the upper part of the stay (43), and the axis extending in the up-down direction of the upper and lower transmission tubes (41) is offset from the left-right center of a pair of left and right lifting devices (17, 70) that are removably fixed to the left and right frames (44) and the left and right transmission tubes (42).

[0011] In the invention described in claim 2, an abutting member (41A) that abuts against the upper part of the rear wall of the pair of left and right lifting devices (17, 70) is provided at the upper part of the vertical transmission cylinder (41), a left connecting part (42L) that connects the rear wall of the left lifting device (17, 70) of the pair of left and right lifting devices is provided at the left part of the horizontal transmission cylinder (42), and a right connecting part (42R) that connects the rear wall of the right lifting device (17, 70) of the pair of left and right lifting devices is provided at the right part of the horizontal transmission cylinder (42). In a side view, a front surface of the abutting member (41A) and a left connecting part (42L) are provided. left The front and the right connecting portion (42R) right A combine harvester as described in claim 1, wherein the front surface is formed parallel.

[0012] In the invention described in claim 3, when viewed from the side, the front surface of the abutting member (41A) and the left connecting portion (42L) left The front and the right connecting portion (42R) right The combine harvester according to claim 2, wherein the front surface is formed to have a predetermined intersecting angle with the axis of the upper and lower transmission cylinders (41).

[0013] The invention described in claim 4 is a combine harvester described in claim 1, in which a conversion section (18A) for converting the output rotation of a rotating shaft mounted inside the second transmission tube (13) into swinging movement is provided on the rear side of the cutting blade device (18), and a front-rear rod (91) is provided extending from the rear of the front-rear frame (22) located at the rightmost side toward the right wall of the second transmission tube (13).

[0014] The invention described in claim 5 is characterized in that, in a side view, the intermediate portion of the front and rear rod (91) is Square fence to prevent small branches from entering The combine harvester according to claim 4, further comprising a protective plate (92) having a shape similar to that of the protective plate.

[0015] The invention described in claim 6 is a combine harvester described in claim 4, in which a protective rod (94) is provided in the middle of the front and rear rods (91) in a side view, which extends upward, then extends upward toward the rear, passes through the right part of the conversion portion (18A), and reaches the upper side of the second transmission cylinder (13).

[0016] The invention described in claim 7 is a combine harvester described in claim 3, in which the right side of the lifting device (17B) located second from the left side of the lifting devices (17) and the left side of the lifting device (17C) located third from the left side of the lifting devices (17) are arranged opposite each other, the upper part of the lifting device (17B) is detachably fixed to the left part of the left and right transmission cylinders (42) with a left engaging part (47L) and the lower part is detachably fixed to the left part of the left and right frames (44) with a left clamping part (48L), and the upper part of the lifting device (17C) is detachably fixed to the right part of the left and right transmission cylinders (42) with a right engaging part (47R) and the lower part is detachably fixed to the right part of the left and right frames (44) with a right clamping part (48R).

[0017] The invention described in claim 8 is characterized in that a right part of the opposite side to the lifting of the lifting device (70B) located second from the left side of the lifting devices (70) is arranged to face a left part of the opposite side to the lifting of the lifting device (70C) located third from the left side of the lifting devices (70), and a right part of the opposite side to the lifting of the lifting device (70D) located fourth from the left side of the lifting devices (70) is arranged to face a left part of the opposite side to the lifting of the lifting device (70C) located fifth from the left side of the lifting devices (70). The left part of the lifting device (70E) on the opposite side to the lifting side is disposed opposite to the left part of the lifting device (70E), and the upper part of the lifting device (70B) is detachably fixed to the left part of the left-right transmission cylinder (42) extending from the lower part of the left-side vertical transmission cylinder (41) with a left engaging part (47L), and the lower part is detachably fixed to the left part of the left-right frame (44) extending from the upper part of the left-side stay (43) with a left clamping part (48L). The upper part of the lifting device (70D) is detachably fixed to the left part of the left-right frame (44) extending from the lower part of the right-side vertical transmission cylinder (41) with the left engaging part (47L), and the lower part is detachably fixed to the right part of the left-side frame (44) extending from the upper part of the left-side stay (43) with the right clamping part (48R). The upper part of the lifting device (70D) is detachably fixed to the left part of the left-side horizontal transmission cylinder (42) extending from the lower part of the right-side vertical transmission cylinder (41) with the left engaging part (47L), and the lower part is detachably fixed to the upper part of the right-side stay (43). the upper part of the lifting device (70E) is detachably fixed to the right part of the left-right frame (44) extending from the lower part of the right-side up-down transmission cylinder (41) with a right engagement part (47R), and the lower part is detachably fixed to the right part of the left-right frame (44) extending from the upper part of the right-side stay (43) with a right clamping part (48R).

[0018] The invention described in claim 9 is a combine harvester described in claim 7 or 8, in which the left engagement part (47L) is formed by an engagement portion (60) provided on the left and right transmission cylinders (42) and a first engaged portion (61) erected on the rear surface of the lifting device (17B, 70B, 70B), and the right engagement part (47R) is formed by an engagement portion (60) provided on the left and right transmission cylinders (42) and a first engaged portion (61) erected on the rear surface of the lifting device (17C, 70C, 70E), and unevenness is formed on the first engaged portion (61).

[0019] The invention described in claim 10 is such that the left clamping part (48L) is formed of an upper clamping part (65) and a lower clamping part (66) provided at the lower part of the lifting device (17B, 70B, 70D), and the right clamping part (48R) is formed of an upper clamping part (65) and a lower clamping part (66) provided at the lower part of the lifting device (17C, 70C, 70E), and a pin (65B) extending in the left-right direction is provided at the upper clamping part (65). The combine harvester according to claim 7 or 8, wherein a front portion of an arc-shaped upper clamping body portion (65C) of the upper clamping portion (65) is fixed to the pin (65B), a front portion of an arc-shaped lower clamping body portion (66A) of the lower clamping portion (66) is rotatably fixed to the pin (65B), a second engaged portion (66B) is provided at a rear portion of the lower clamping body portion (66A), and the rear portion of the second engaged portion (66B) is curved downward and rearward.

[0020] The invention according to claim 11 is the combine according to claim 10, wherein an elastic member is laminated on the inner circumferential surfaces of the upper clamping body part (65C) and the lower clamping body part (66A).

[0021] The invention described in claim 12 is a combine described in claim 3, in which the left and right transmission barrels (42) and the left portions of the left and right frames (44) are connected by a left upper and lower frame (45L) extending in the vertical direction, and the right portions of the left and right transmission barrels (42) and the left and right frames (44) are connected by an upper and lower upper frame (45R) extending in the vertical direction.

[0022] The invention described in claim 13 is the combine described in claim 12, wherein the left upper and lower frames (45L) and the right upper and lower frames (45R) are arranged parallel to the rear surface of the lifting device (17, 70) in a side view. Effect of the Invention

[0023] According to the invention described in claim 1, a grass dividing body (16) for dividing culms, a lifting device (17, 70) for lifting the divided culms, a cutting blade device (18) for cutting the base of the lifted culms, and a transport device (19) for clamping the cut culms and transporting them to the threshing device (4) are provided on the harvesting frame (10) of the harvesting device (3). At least one lifting frame (40) is provided in the middle of a first transmission tube (15) extending in the left-right direction and disposed on the upper part of the harvesting frame (10). The lifting frame (40) is formed of an upper-lower transmission tube (41) extending downward from the first transmission tube (15) and a left-right transmission tube (42) extending in the left-right direction from the lower part of the upper-lower transmission tube (41). The grass dividing body (16) is transmitted from a second transmission tube (13) extending in the left-right direction and disposed on the lower part of the harvesting frame (10). The front and rear frames (22) extending toward the left and right (6) are arranged at a predetermined interval in the left-right direction, and at least one stay (43) extending upward from the middle part of the frame (23) and a left and right frame (44) extending in the left-right direction from the upper part of the stay (43) are provided in the middle part of the frame (23) extending in the left-right direction connecting the middle parts of the front and rear frames (22), and the axis extending in the up-down direction of the vertical transmission cylinder (41) is shifted from the left-right center of the pair of left and right lifting devices (17, 70) which are detachably fixed to the left and right frame (44) and the left and right transmission cylinder (42). Therefore, the hanging frame provided between the pair of left and right lifting devices (17, 70) can be quickly attached and detached from the vertical transmission cylinder (41), and the pair of left and right lifting devices (17, 70) can be quickly attached and detached from the vertical transmission cylinder (41). In addition, by removing the lifting device (17, 70) from the left and right transmission cylinders (42) and the left and right frames (44), a large working space can be secured in front of the conveying device (19), making it easy to remove straw stuck in the conveying device (19).

[0024] According to the invention of claim 2, in addition to the effects of the invention of claim 1, an abutting member (41A) is provided at the upper part of the up-down transmission cylinder (41) against which the upper parts of the rear walls of the pair of left and right lifting devices (17, 70) abut, a left connecting part (42L) is provided at the left part of the left and right transmission cylinders (42) for connecting the rear walls of the left lifting device (17, 70), and a right connecting part (42R) is provided at the right part of the left and right transmission cylinders (42) for connecting the rear walls of the right lifting device (17, 70), and when viewed from the side, a front surface of the abutting member (41A) and a left connecting part (42L) are provided. left Front and right joint (42R) right Since the front surfaces are formed parallel to each other, the pair of left and right lifting devices (17, 70) can be attached and detached more quickly.

[0025] According to the invention of claim 3, in addition to the effect of the invention of claim 2, the front surface of the contact member (41A) and the left connecting portion (42L) are in contact with each other in a side view. left Front and right joint (42R) right Since the front surface is formed at a predetermined intersecting angle with the axis of the upper and lower transmission cylinders (41), the pair of left and right lifting devices (17, 70) can be attached and detached even more quickly.

[0026] According to the invention described in claim 4, in addition to the effects of the invention described in claim 1, a conversion part (18A) that converts the output rotation of a rotating shaft mounted inside the second transmission cylinder (13) into swinging movement is provided on the rear side of the cutting blade device (18), and a front-rear rod (91) is provided extending from the rear of the front-rear frame (22) located at the far right toward the right wall of the second transmission cylinder (13), thereby making it possible to prevent the toes of the operator from coming into contact with the conversion part (18A).

[0027] According to the invention of claim 5, in addition to the effect of the invention of claim 4, in a side view, the intermediate portion of the front and rear rods (91) is provided with: Square fence to prevent small branches from entering The provision of the protective plate (92) having a shape similar to that of the protective plate (92) makes it possible to more effectively prevent the toes of the operator from coming into contact with the conversion portion (18A).

[0028] According to the invention described in claim 6, in addition to the effects of the invention described in claim 4, a protective rod (94) is provided in the middle of the front-rear rod (91) in a side view, which extends upward and then upward toward the rear, passes through the right part of the conversion part (18A), and reaches the upper side of the second transmission cylinder (13). This further prevents the toes of the operator from coming into contact with the conversion part (18A).

[0029] According to the invention of claim 7, in addition to the effect of the invention of claim 3, the right part of the lifting device (17B) located second from the left side of the lifting devices (17) on the opposite side to the lifting direction and the left part of the lifting device (17C) located third from the left side of the lifting devices (17) are arranged to face each other, and the upper part of the lifting device (17B) is attached to the left part of the left-right transmission cylinder (42) by the left engagement part (47L), and the lower part is attached to the left part of the left-right frame (44) by the left clamping part (48L). Since the lifting device (17C) is detachably fixed at its upper part to the right part of the left-right transmission cylinder (42) by the right engaging part (47R) and at its lower part to the right part of the left-right frame (44) by the right clamping part (48R), the lifting device (17B) can be more easily removed by releasing the engagement of the left engaging part (47L) and releasing the clamping of the left clamping part (48L), and the lifting device (17C) can be more easily removed by releasing the engagement of the right engaging part (47R) and releasing the clamping of the right clamping part (48R).

[0030] According to the invention of claim 8, in addition to the effect of the invention of claim 3, the right side of the opposite side to be raised of the raising device (70B) located second from the left side of the raising devices (70) and the left side of the opposite side to be raised of the raising device (70C) located third from the left side of the raising devices (70) are arranged to face each other, and the right side of the opposite side to be raised of the raising device (70D) located fourth from the left side of the raising devices (70) and the right side of the opposite side to be raised of the raising device (70E) located fifth from the left side of the raising devices (70) are arranged to face each other. The left parts of the lifting device (70B) are arranged opposite to each other, and the upper part of the lifting device (70B) is detachably fixed to the left part of the horizontal transmission cylinder (42) extending from the lower part of the left vertical transmission cylinder (41) with a left engaging part (47L), and the lower part is detachably fixed to the left part of the horizontal frame (44) extending from the upper part of the left stay (43) with a left clamping part (48L). The upper part of the lifting device (70C) is detachably fixed to the right part of the horizontal transmission cylinder (42) extending from the lower part of the left vertical transmission cylinder (41) with a right engaging part (47R), and the lower part is detachably fixed to the left The lifting device (70D) is detachably fixed to the right part of the left and right frame (44) extending from the upper part of the stay (43) by a right clamping part (48R). The upper part of the lifting device (70D) is detachably fixed to the left part of the left and right transmission cylinder (42) extending from the lower part of the right-side vertical transmission cylinder (41) by a left engagement part (47L). The lower part of the lifting device (70D) is detachably fixed to the left part of the left and right frame (44) extending from the upper part of the right-side stay (43) by a left clamping part (48L). The upper part of the lifting device (70E) is detachably fixed to the left part of the right-side vertical transmission cylinder (41) extending from the lower part of the right-side vertical transmission cylinder (41). The right portion of the left and right transmission cylinders (42) is detachably fixed to the right portion of the left and right frame (44) extending from the upper portion of the right stay (43) by the right engaging part (47R), and the lower portion is detachably fixed to the right portion of the left and right frame (44) extending from the upper portion of the right stay (43) by the right clamping part (48R). Therefore, the lifting devices (70B, 70D) can be more easily removed by releasing the engagement of the left engaging part (47L) and releasing the clamping of the left clamping part (48L), and the lifting devices (70C, 70E) can be more easily removed by releasing the engagement of the right engaging part (47R) and releasing the clamping of the right clamping part (48R).

[0031] According to the invention of claim 9, in addition to the effects of the invention of claim 7 or 8, the left engagement part (47L) is formed of the engagement part (60) provided on the left and right transmission cylinders (42) and the first engaged part (61) erected on the rear surface of the raising device (17B, 70B, 70B), and the right engagement part (47R) is formed of the engagement part (60) provided on the left and right transmission cylinders (42) and the first engaged part (61) erected on the rear surface of the raising device (17C, 70C, 70E), and unevenness is formed on the first engaged part (61). Therefore, the engagement part (60) can be firmly engaged with the first engaged part (61) to fix the raising device (17, 70) in close contact with the left and right transmission cylinders (42).

[0032] According to the invention of claim 10, in addition to the effects of the invention of claim 7 or 8, the left clamping part (48L) is formed of an upper clamping part (65) and a lower clamping part (66) provided at the lower part of the raising device (17B, 70B, 70D), the right clamping part (48R) is formed of an upper clamping part (65) and a lower clamping part (66) provided at the lower part of the raising device (17C, 70C, 70E), a pin (65B) extending in the left-right direction is provided at the upper clamping part (65), and the pin (65B) is provided with an arc of the upper clamping part (65). The front portion of the arc-shaped upper clamping body portion (65C) is fixed, the front portion of the arc-shaped lower clamping body portion (66A) of the lower clamping portion (66) is rotatably fixed to the pin (65B), a second engaged portion (66B) is provided at the rear portion of the lower clamping body portion (66A), and the rear portion of the second engaged portion (66B) is curved downward and rearward, so that the left and right frames (44) are tightly held by the upper clamping body portion (65C) and the lower clamping body portion (66A), and the lower portions of the lifting devices (17, 70) can be firmly fixed to the left and right frames (44).

[0033] According to the invention described in claim 11, in addition to the effects of the invention described in claim 10, an elastic material is laminated on the inner surfaces of the upper clamping body portion (65C) and the lower clamping body portion (66A), so that the upper clamping body portion (65C) and the lower clamping body portion (66A) can clamp the left and right frames (44) more closely.

[0034] According to the invention described in claim 12, in addition to the effects of the invention described in claim 3, the left and right transmission cylinders (42) and the left and right frames (44) are connected at their left portions by the left upper and lower frame (45L) extending in the vertical direction, and the right portions of the left and right transmission cylinders (42) and the left and right frames (44) are connected at their right portions by the right upper and lower frame (45R) extending in the vertical direction. This increases the rigidity of the left and right transmission cylinders (42) and the left and right frames (44), and makes it possible to suppress deformation of the left and right transmission cylinders (42) and the left and right frames (44) when the lifting device (17, 70) is removed from the left and right transmission cylinders (42) and the left and right frames (44).

[0035] According to the invention of claim 13, in addition to the effects of the invention of claim 12, the upper and lower left frame (45L) and the lower right and lower right frame (45R) are arranged parallel to the rear surface of the lifting device (17, 70) in a side view, so that the rigidity of the left and right transmission cylinders (42) and the left and right frames (44) can be further increased. [Brief description of the drawings]

[0036] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. 4 is a front view of a frame for fixing the lifting device. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. 13 is a rear view of the frame for fixing the lifting device. [Figure 13]FIG. 8 is an enlarged rear view of the main part of FIG. 7. [Figure 14] FIG. 13 is a left side view showing the lifting device fixed to the left and right transmission cylinders. [Figure 15] This is a left side view of the grass division frame with the top part moved forward. [Figure 16] FIG. 13 is a left side view showing the upper part of the lifting device moved forward. [Figure 17] FIG. 4 is a left side view showing the lower part of the lifting device removed. [Figure 18] 13 is a left side view of an engaging part in which an engaging portion and an engaged portion are engaged with each other. FIG. [Figure 19] 13 is a left side view of the engaging part with the engaging portion and the engaged portion disengaged from each other. FIG. [Figure 20] 13 is a left side view of the engaging parts that sandwich the left and right frames. FIG. [Figure 21] 13 is a left side view of the engaging part when the clamping between the left and right frames is released. FIG. [Figure 22] FIG. 13 is a front view of another combine harvester. [Diagram 23] FIG. 1 is a front view of a side light fixed to a left side mirror frame. [Figure 24] FIG. [Diagram 25] FIG. [Figure 26] FIG. [Figure 27] FIG. 34 is an enlarged right side view of the main part of FIG. 33. [Figure 28] FIG. [Figure 29] FIG. 4 is an explanatory diagram of an operation switch of the oil supply box. [Diagram 30] FIG. 2 is a right side view of the blade protection part of the first embodiment. [Diagram 31] FIG. 38 is a right side view showing the front and rear rods of FIG. 37 with a safety plate attached thereto. [Diagram 32] FIG. 11 is a right side view of the blade protection part of the second embodiment. [Diagram 33] FIG. 40 is a right side view showing the rear portion of the front and rear rod of FIG. 39 fixed to the right wall of the transmission cylinder. [Diagram 34]FIG. [Diagram 35] FIG. [Diagram 36] FIG. 13 is a left side view showing the lifting device engaged with the reaping device. [Figure 37] FIG. 13 is a front view showing the lifting device engaged with the reaping device. [Figure 38] FIG. 13 is a right side view showing the lifting device engaged with the operating section. [Figure 39] This is a left side view showing the lifting device engaged with the threshing device. [Diagram 40] FIG. 13 is a left side view showing the lifting device engaged with the nano-guide. [Diagram 41] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0037] As shown in Figures 1 and 2, a combine harvester has a traveling device 2 consisting of a pair of left and right crawlers that travels on the soil surface on the underside of a body frame 1, a harvesting device 3 that harvests grain stalks in the field is provided on the front side of the body frame 1, a threshing device 4 that threshes and sorts the harvested grain stalks is provided on the rear left side of the harvesting device 3, and a control unit 5 on which an operator rides is provided on the rear right side of the harvesting device 3.

[0038] Below the control unit 5 is an engine room 6 in which an engine is mounted, and behind the control unit 5 is a grain tank 7 in which threshed and sorted grains are stored, and behind the grain tank 7 is a discharge auger 8 consisting of a vertically extending grain lifting section and a horizontal discharge section extending back and forth to discharge grains to the outside.

[0039] The cutting frame 10 of the cutting device 3 is formed from a transmission tube 11 extending in the left-right direction to transmit the output rotation of the engine, a transmission tube 12 extending downward and forward from the right part of the transmission tube 11, a transmission tube 13 (the "second transmission tube" in the claims) extending in the left-right direction from the lower part of the transmission tube 12, a transmission tube 14 extending upward from the left part of the transmission tube 13, and a transmission tube (the "first transmission tube" in the claims) 15 extending in the left-right direction from the upper part of the transmission tube 14.

[0040] The harvesting frame 10 is equipped with a harvesting body 16 for harvesting the culms planted in the field, a lifting device 17 for raising the harvested culms, a pair of left and right cutting blade devices 18 for cutting the base of the raised culms, and a transport device 19 for clamping the harvested culms and transporting them to the threshing device 4.

[0041] 3 and 4, the right part of the transmission cylinder 11 and the middle part of the transmission cylinder 15 are connected by a connecting member 20 made of round steel, and the right part of the transmission cylinder 15 and the right part of the transmission cylinder 13 are connected by a connecting member 21 made of round steel. As a result, the left part of the transmission cylinder 15 is supported by the transmission cylinder 14, the middle part of the transmission cylinder 15 is supported by the connecting member 20, and the right part of the transmission cylinder 15 is supported by the connecting member 21, so that deformation of the transmission cylinder 15, such as bending and twisting, can be suppressed.

[0042] The connecting member 20 extends from the right part of the transmission cylinder 11 to the upper front side so as to pass over the upper side of the conveying device 19, then extends forward, and then extends forward and downward to reach the transmission cylinder 15. The connecting member 21 extends from the right part of the transmission cylinder 13 to the upper front side so as to pass over the upper side of the conveying device 19, then extends upward, and then extends forward and upward to reach the transmission cylinder 15.

[0043] As shown in Fig. 5, the divided grass body 16 is formed of five divided grass bodies 16A to 16E. The divided grass bodies 16A to 16E are fixed to the front parts of the front-rear frames 22 extending forward from the transmission tubes 13 provided at a predetermined interval in the left-right direction. In addition, the divided grass bodies 16A to 16E are connected by a frame 23 formed of a round pipe that connects the middle parts of the front-rear frames 22 provided on the leftmost side and the front-rear frames 22 provided on the rightmost side.

[0044] The lifting device 17 is composed of four lifting devices 17A to 17D. The right side of the lifting device 17B and the left side of the lifting device 17C are arranged opposite each other. This allows a total of four rows of culms to be lifted at the same time: two rows between the lifting devices 17A and 17B, and two rows between the lifting devices 17C and 17D.

[0045] As shown in Fig. 6, a rotating shaft (not shown) supporting a driving sprocket provided on the upper part of the lifting device 17A is connected to a rotating shaft 31L of the upper and lower transmission tubes 30L extending downward from the left part of the transmission tube 15, and the lower part of the lifting device 17A is fixed to a rectangular connecting member 33L provided on a stay 32L that curves upward and to the right from the left part of the frame 23. As a result, the output rotation of the engine transmitted to the rotating shaft installed in the transmission tube 15 is transmitted to the driving sprocket of the lifting device 17A via the rotating shaft 31L installed in the upper and lower transmission tubes 30L to rotate the lifting chain. In addition, a cover 25 is provided on the front side of the transmission tube 15.

[0046] A rotating shaft (not shown) supporting a drive sprocket provided on the upper part of the lifting device 17D is connected to a rotating shaft 31R of the upper and lower transmission cylinders 30R extending downward from the right part of the transmission cylinder 15, and the lower part of the lifting device 17D is fixed to a rectangular connecting member 33R provided on a stay 32R curving upward and leftward from the right part of the frame 23. As a result, the output rotation of the engine transmitted to the rotating shaft mounted inside the transmission cylinder 15 is transmitted to the drive sprocket of the lifting device 17D via the rotating shaft 31R mounted inside the upper and lower transmission cylinders 30R, and can rotate the lifting chain.

[0047] A raising frame 40 is provided in the left-right intermediate portion of the transmission cylinder 15. The raising frame 40 is formed of an upper and lower transmission cylinder 41 extending downward from the intermediate portion, and a left-right transmission cylinder 42 extending in the left-right direction from the lower portion of the upper and lower transmission cylinder 41.

[0048] As shown in Figures 7 to 11, the left-right center of the left-right transmission cylinder 42 is provided at a position shifted leftward from the axis extending in the up-down direction of the up-down transmission cylinder 41. That is, the length L1 of the left-right transmission cylinder 42 extending leftward from the lower part of the up-down transmission cylinder 41 is formed longer than the length L2 of the left-right transmission cylinder 42 extending leftward from the lower part of the up-down transmission cylinder 41. As a result, as shown in Figure 5, the left-right center of the lifting device 17B and the lifting device 17C is provided at a position shifted leftward from the axis extending in the up-down direction of the up-down transmission cylinder 41, and the upper part of the lifting device 17B and the lifting device 17C can be easily attached and detached from the up-down transmission cylinder 41.

[0049] A connecting portion 42A is provided at the rear of the left and right transmission cylinder 42, at a position of length L3 to the right of the lower portion of the up and down transmission cylinder 41, where a rotating shaft for an auxiliary lifting device (not shown) can be provided. In this embodiment, the length L1 is the sum of the lengths L2 and L3. For example, when the length L2 is 135 mm and the length L3 is 45 mm, the length L1 is set to 180 mm. This makes it possible to suppress the twisting of the rotating shaft (not shown) that is built in the left and right transmission cylinder 42 and extends in the left and right direction, which occurs due to the moment applied to the rotating shaft.

[0050] An abutment member 41A that abuts the upper portions of the lifting device 17B and the lifting device 17C is provided on the upper portion of the vertical transmission cylinder 41. In addition, in a side view, the left front surface of the left connecting portion 42L that houses the rotating shaft 46L of the left-right transmission cylinder 42 and the right front surface of the right connecting portion 42R that houses the rotating shaft 46R are formed at a predetermined intersection angle with the axis extending in the vertical direction of the vertical transmission cylinder 41, and are formed approximately parallel to the front surface of the abutment member 41. As a result, the upper ends of the lifting device 17B and the lifting device 17C can be abutted against the abutment member 41A, and the upper portions of the lifting device 17B and the lifting device 17C can be attached and detached to the left front surface of the left connecting portion 42L and the right front surface of the right connecting portion 42R, respectively.

[0051] When the lifting frame 40 is attached to the transmission cylinder 15, the upper and lower transmission cylinders 41 are attached in a position extending downward and forward from the upper part of the upper and lower transmission cylinders 41. The left front surface of the left connecting part 42L and the right front surface of the right connecting part 42R are formed symmetrically, and a pair of upper and lower openings for inserting bolts or the like are formed at a position offset to the left from the center in the left-right direction on the left front surface of the left connecting part 42L, and a pair of upper and lower openings for inserting bolts or the like are formed at a position offset to the right from the center in the left-right direction on the right front surface of the right connecting part 42R. This allows the upper parts of the lifting device 17B and the lifting device 17C to be easily attached and detached from the left front surface of the left connecting part 42L and the right front surface of the right connecting part 42R, respectively.

[0052] The outer diameter of the left and right transmission cylinders 42 is larger than the outer diameter of the upper and lower transmission cylinders 41. This allows the diameter of a rotating shaft (not shown) extending in the left-right direction along the left and right transmission cylinders 42 to be increased, and the output rotation of the engine can be efficiently transmitted to the raising devices 17B and 17C. The upper parts of the raising devices 70B and 70C described below are fixed to the raising frame 40 provided on the left side of the middle part of the transmission cylinder 15, and the upper parts of the raising devices 70D and 70E are fixed to the raising frame 40 provided on the right side of the middle part of the transmission cylinder 15.

[0053] 6, a stay 43 is provided at the middle part of the frame 23, extending upward from the middle part, and left and right frames 44 made of round pipes and extending in the left and right direction are provided on the upper part of the stay 43. In addition, restricting members 44L, 44R made of washers or the like are provided on both sides of the left and right frames 44. This makes it possible to prevent a left clamping part 48L and a right clamping part 48R, which will be described later, from coming off the left and right frames 44 in the left and right direction.

[0054] The left parts of the left and right transmission cylinders 42 and the left and right frames 44 are connected by the left upper and lower frames 45L, and the right parts of the left and right transmission cylinders 42 and the left and right frames 44 are connected by the right upper and lower frames 45R. This increases the rigidity of the left and right transmission cylinders 42 and the left and right frames 44, and suppresses deformation of the left and right transmission cylinders 42 and the left and right frames 44 even when the lifting devices 17B and 17C are removed. In addition, when viewed from behind, the upper and lower transmission cylinders 41, the left and right transmission cylinders 42, the stays 43, the left and right frames 44, the left upper and lower frames 45L, and the right upper and lower frames 45R are disposed inside the outer peripheries of the lifting devices 17B and 17C.

[0055] As shown in Figures 12 and 13, the rotating shaft 51 supporting the driving sprocket 50 provided on the upper part of the lifting device 17B is connected to the rotating shaft 46L of the left and right transmission tubes 42. As a result, the output rotation of the engine transmitted to the rotating shaft installed in the transmission tube 15 is transmitted to the driving sprocket 50 of the lifting device 17B via the rotating shafts 46L installed in the upper and lower transmission tubes 41 and the left and right transmission tubes 42, etc., to rotate the lifting chain. In addition, a part adjacent to a part facing the rotating shaft 46L at the upper part of the lifting device 17B is fixed to the left part of the left and right transmission tubes 42 via a left engaging part 47L such as a snap lock, and the lower part of the lifting device 17B is fixed to the left part of the left and right frames 44 via a left clamping part 48L such as a snap lock.

[0056] A rotating shaft (not shown) supporting a driving sprocket (not shown) provided at the upper part of the lifting device 17C is connected to the rotating shaft 46R of the left and right transmission cylinders 42. As a result, the output rotation of the engine transmitted to the rotating shaft installed inside the transmission cylinder 15 is transmitted to the driving sprocket of the lifting device 17C via the rotating shaft 46R installed inside the upper and lower transmission cylinders 41 and the left and right transmission cylinders 42, etc., to rotate the lifting chain. In addition, a part adjacent to a part facing the rotating shaft 46R at the upper part of the lifting device 17C is fixed to the right part of the left and right transmission cylinders 42 via a right engaging part 47R such as a snap lock, and a lower part of the lifting device 17C is fixed to the right part of the left and right frames 44 via a right clamping part 48R such as a snap lock. In addition, the lower parts of lifting device 70B and lifting device 70C, which will be described later, are fixed to both sides of the left and right frames 44 provided on the left side of the middle part of frame 23, and the lower parts of lifting device 70D and lifting device 70E are fixed to both sides of the left and right frames 44 provided on the right side of the middle part of frame 23.

[0057] A support member 49L is provided on the upper part of the left upper and lower frames 45L, which supports an oil nozzle that oils the raising chain (not shown) of the raising device 17B, and a support member 49R is provided on the upper part of the right lower frame 45R, which supports an oil nozzle that oils the raising chain (not shown) of the raising device 17C. In addition, the raising chain is fitted with raising lugs 35 at a specified interval, which stand up when moving from the lower part to the upper part of the raising device 17, and which lie down when moving from the upper part to the lower part of the raising device 17. The raising lugs 35 are laid down by a laying guide (not shown) provided on the outside of the driving sprocket 50.

[0058] As shown in Fig. 14, the lower part of the hanging frame 24 extending downward and forward from the engagement member 52 provided at the front of the upper and lower transmission tubes 41 is rotatably supported by the pin 53 extending in the left-right direction provided at the rear of the divided grass body 16C. This allows the upper part of the hanging frame 24 to be disengaged from the engagement member 52 and the upper part of the hanging frame 24 to be pulled forward around the axis of the pin 53, as shown in Fig. 15, to easily attach and detach the lifting device 17B and the lifting device 17C.

[0059] As shown in FIG. 14, the upper part of the rear surface of the lifting device 17B, i.e., the portion below the drive sprocket 50, is fixed to the left portion of the left / right transmission cylinder 42 via the left engaging part 47L, and the lower part of the rear surface of the lifting device 17B is fixed to the left portion of the left / right frame 44 via the left clamping part 48L.

[0060] When removing the lifting device 17B from the left and right transmission tubes 42, first, as shown in Fig. 16, the rotation shaft 51 of the lifting device 17B is disconnected from the rotation shaft 46L of the left and right transmission tubes 42, the upper part of the rear surface of the lifting device 17B is disengaged from the left engagement part 47L, and the upper part of the lifting device 17B is pulled forward around the axis of the left and right frames 44. Next, as shown in Fig. 17, the lower part of the lifting device 17B is disengaged from the left clamp part 48L, and the lower part of the lifting device 17B is removed from the left part of the left and right frames 44. This makes it possible to easily remove the straw entangled in the conveying device 19 arranged behind the lifting device 17B by removing the lifting device 17B from the left and right transmission tubes 42.

[0061] The left upper and lower frame 45L is provided parallel to the rear surface of the lifting device 17B. This makes it possible to further increase the rigidity of the left and right transmission cylinders 42 and the left and right frames 44.

[0062] Similarly, the upper part of the rear surface of the lifting device 17C, i.e., the portion below the drive sprocket (not shown), is fixed to the right part of the left and right transmission cylinders 42 via the right engaging part 47R, and the lower part of the rear surface of the lifting device 17C is fixed to the right part of the left and right frames 44 via the left clamping part 48L.

[0063] When removing the lifting device 17C from the left and right transmission tubes 42, etc., the lifting device 17C is disconnected from the rotating shaft (not shown) of the lifting device 17C and the rotating shaft 46R of the left and right transmission tubes 42, similarly to the lifting device 17B, the upper part of the rear surface of the lifting device 17C is disengaged from the right engaging part 47R, and the upper part of the lifting device 17C is pulled forward around the axis of the left and right frames 44. Next, the lower part of the lifting device 17C is disengaged from the right clamping part 48R, and the lower part of the lifting device 17C is removed from the right part of the left and right frames 44. This makes it possible to easily remove the straw entangled in the conveying device 19 arranged behind the lifting device 17C by removing the lifting device 17C from the left and right transmission tubes 42, etc.

[0064] The upper right and lower right frames 45R are provided parallel to the rear surface of the lifting device 17C. This allows the rigidity of the left and right transmission cylinders 42 and the right portions of the left and right frames 44 to be further increased.

[0065] As shown in Figs. 18 and 19, the left engaging part 47L is formed of an engaging part 60 provided on the left part of the left-right transmission tube 42 and an engaged part (the "first engaged part" in the claims) 61 provided on the rear surface of the lifting device 17B. The engaging part 60 is formed of a mounting plate 60A, a pin 60B provided on the mounting plate 60A and extending in the vertical direction, a lever 60C rotatably attached to the pin 60B, and a hook 60D provided on the lever 60C. The engaged part 61 extends rearward from the rear surface of the lifting device 17B, and the right part of the engaged part 61 is formed with a projection and recess for engaging with the hook 60D. This allows the upper part of the lifting device 17B to be easily attached and detached from the left part of the left-right transmission tube 42.

[0066] Similarly, the right engaging part 47R is formed of an engaging part 60 provided on the right part of the left-right transmission tube 42 and an engaged part 61 provided on the rear surface of the lifting device 17C. The engaging part 60 is formed of a mounting plate 60A, a pin 60B extending in the vertical direction provided on the mounting plate 60A, a lever 60C rotatably attached to the pin 60B, and a hook 60D provided on the lever 60C. The engaged part 61 extends rearward from the rear surface of the lifting device 17C, and the left part of the engaged part 61 is formed with a projection and recess that engages with the hook 60D. This allows the upper part of the lifting device 17C to be easily attached and detached from the right part of the left-right transmission tube 42.

[0067] As shown in FIGS. 20 and 21, the left clamping member 48L is formed of an upper clamping portion 65 provided on the lower part of the rear surface of the raising device 17B, and a lower clamping portion 66 provided below the upper clamping portion 65.

[0068] The upper clamping part 65 is formed of a mounting plate 65A, a pin 65B extending in the left-right direction provided on the lower part of the mounting plate 65A, a generally arcuate upper clamping body part 65C supported by the pin 65B, a pin 65D extending in the left-right direction provided on the upper part of the mounting plate 65A, a lever 65E rotatably attached to the pin 65D, and a hook 65F provided on the lever 65E. It is preferable that an elastic member such as rubber is laminated on the inner peripheral surface of the upper clamping body part 65C.

[0069] The lower clamping part 66 is formed of a substantially arc-shaped lower clamping body part 66A rotatably supported by the pin 65B, and an engaged part (the "second engaged part" in the claims) 66B provided at the rear end of the lower clamping body part 66A, and the rear part of the engaged part 66B is curved downward and rearward. This allows the lower part of the lifting device 17B to be easily attached to and detached from the left part of the left-right frame 44. Note that it is preferable to laminate an elastic material such as rubber on the inner peripheral surface of the lower clamping body part 66A, and the lower clamping body part 66A can also be made of a high-hardness elastic material.

[0070] Similarly, the right clamping part 48R is formed of an upper clamping part 65 provided on the lower part of the rear surface of the raising device 17C and a lower clamping part 66 provided below the upper clamping part 65.

[0071] The upper clamping part 65 is formed of a mounting plate 65A, a pin 65B extending in the left-right direction provided on the lower part of the mounting plate 65A, a generally arcuate upper clamping body part 65C supported by the pin 65B, a pin 65D extending in the left-right direction provided on the upper part of the mounting plate 65A, a lever 65E rotatably attached to the pin 65D, and a hook 65F provided on the lever 65E. It is preferable that an elastic member such as rubber is laminated on the inner peripheral surface of the upper clamping body part 65C.

[0072] The lower clamping part 66 is formed of a substantially arc-shaped lower clamping body part 66A rotatably supported by the pin 65B, and an engaged part 66B provided at the rear end part of the lower clamping body part 66A, the rear part of which is curved downward and rearward. This allows the lower part of the lifting device 17C to be easily attached to and detached from the left part of the left-right frame 44. It is preferable to laminate an elastic material such as rubber on the inner peripheral surface of the lower clamping body part 66A, and the lower clamping body part 66A can also be made of a high-hardness elastic material.

[0073] 22 and 23 show another six-row combine harvester. The same parts as those in the four-row combine harvester described above are given the same reference numerals and the description thereof will be omitted.

[0074] The lifting device 70 of the harvesting device 3 is formed of six lifting devices 70A to 70F. The right side of the lifting device 70B and the left side of the lifting device 70C are arranged opposite each other, and the right side of the lifting device 70D and the left side of the lifting device 70E are arranged opposite each other. This allows a total of six rows of stalks to be lifted simultaneously: two rows between the lifting devices 70A and 70B, two rows between the lifting devices 70C and 70D, and two rows between the lifting devices 70E and 70F. The steering unit 5 is covered by a cabin 9.

[0075] The lifting device 70A is fixed to the connecting member 33L between the upper and lower transmission cylinders 30L and the stays 32L, and the lifting device 70F is fixed to the connecting member 33R between the upper and lower transmission cylinders 30R and the stays 32R. The lifting device 70A is formed similarly to the lifting device 17A, and the lifting device 70F is formed similarly to the lifting device 17D.

[0076] The lifting device 70B is fixed to the left part of the left and right transmission tubes 42 of the lifting frame 40 provided on the left side of the intermediate part and to the left part of the left and right frame 44 provided on the left side of the intermediate part, and the lifting device 70D is fixed to the left part of the left and right transmission tubes 42 of the lifting frame 40 provided on the right side of the intermediate part and to the left part of the left and right frame 44 provided on the left side of the intermediate part. The lifting devices 70B and 70D are formed in the same manner as the lifting device 17B.

[0077] The lifting device 70C is fixed to the right part of the left and right transmission tube 42 of the lifting frame 40 provided on the left side of the intermediate part and to the right part of the left and right frame 44 provided on the left side of the intermediate part, and the lifting device 70E is fixed to the right part of the left and right transmission tube 42 of the lifting frame 40 provided on the right side of the intermediate part and to the right part of the left and right frame 44 provided on the right side of the intermediate part. The lifting devices 70C and 70E are formed in the same manner as the lifting device 17C.

[0078] 24 and 25, a gear box 72 that accelerates or decelerates the output rotation of the rotating shaft of the transmission cylinder 14 is provided at the connection between the transmission cylinder 14 and the transmission cylinder 15. An operating lever 73 that operates a shifter (not shown) that switches the meshing gears of the gear box 72 is provided above the transmission cylinder 15 that is disposed behind the cover 25.

[0079] The operating lever 73 is formed of a horizontal rod 73A extending in the left-right direction and a vertical rod 73B standing on the right side of the horizontal rod 73A.

[0080] The left end of the horizontal rod 73A is connected to a shifter connection portion 72A provided on the outer surface of the gearbox 72, and the right end of the horizontal rod 73A is supported rotatably by a support member 74 provided in an upright position in the middle of the transmission tube 15.

[0081] The vertical rod 73B is provided close to the left side of the support member 74. The vertical rod 73B extends upward from the right part of the horizontal rod 73A, and then extends toward the control unit 5 at the upper front side. This allows the left wall of the cabin 9 to extend further leftward to increase the working space inside the cabin 9. Also, an operator on the control unit 5 can operate the operation lever 73 to change the meshing gear of the gear box 72 to increase or decrease the lifting speed of the lifting device 70A, etc. A grip 73C that the operator can hold is attached to the upper end of the vertical rod 73B.

[0082] 26 to 28, both left and right sides of the reaping device 3 are covered with side covers 3A, and the upper front side of the reaping device 3 is covered with an upper cover 3B. An oil controller 76 that oils the reaping device 3 and the threshing device 4 is provided above the cover 19A that covers the upper side of the transport device 19.

[0083] The oil controller 76 is fixed to the upper surface of a plate-shaped support member 77 with its operation surface facing the control unit 5. The support member 77 extends to the right side, i.e., to the control unit 5 side, from a stay 78 erected at the rear of the upper surface of the cover 19A, and is then fixed to the upper part of a pipe-shaped connecting member 79 extending upward. This allows an operator riding on the control unit 5 to operate switches 76A, 76B of the oil controller 76 to oil the reaping device 3 and the threshing device 4. Reference numeral 20A denotes a cutting blade lever that adjusts the height at which the cutting blade device 18 cuts the base of the culm.

[0084] As shown in Fig. 29, a pair of left and right switches 76A, 76B are provided on the operation surface of the oil controller 76. As shown in the labels below the switches 76A, 76B, oil can be poured into the threshing device 4 by rotating the rotary operation part of the switch 76A counterclockwise to move it toward the 9 o'clock direction. In addition, oil can be poured into the lifting chain of the lifting device 70A of the reaping device 3 by rotating the rotary operation part of the switch 76B counterclockwise to move it toward the 9 o'clock direction while rotating the rotary operation part of the switch 76A clockwise to move it toward the 3 o'clock direction, and oil can be poured into the cutting blade device 18 of the reaping device 3 by rotating the rotary operation part of the switch 76B clockwise to move it toward the 3 o'clock direction.

[0085] <Blade protection portion of the first embodiment> 30, the cutting blade protection part 90 of the first embodiment is provided with a front-rear rod 91 extending in the front-rear direction at the rear of the front-rear frame 22 to which the lower part of the grass body 16E is fixed. The front-rear rod 91 extends downward and rearward from the rear of the front-rear frame 22, and then extends upward and rearward to the right of the transmission tube 13.

[0086] In a side view, the middle part of the front-rear rod 91 is provided at a position facing, i.e. overlapping, the conversion part 18A that transmits the output rotation of the transmission tube 13 to the right-side cutting blade device 18. The conversion part 18A converts the output rotation of the transmission tube 13 and transmits it to the cutting blade device 18 by swinging it left and right. This makes it possible to prevent twigs and the like blown into the field from getting caught in the sliding part of the conversion part 18A. In addition, when riding on the control unit 5, it is possible to prevent the operator's toes from accidentally coming into contact with the conversion part 18A, thereby improving safety when the operator rides on the control unit 5 or when dismounting from the control unit 5.

[0087] As shown in Fig. 31, it is preferable to attach a rectangular protective plate 92 to the middle of the front and rear rod 91 to prevent the intrusion of twigs and the like from the outside. This can further prevent twigs and the like from getting caught in the sliding part of the conversion part 18A, and can further increase the safety of the operator when boarding the control part 5. The upper part of the protective plate 92 is engaged with a pair of front and rear engaging parts 93A formed on a support member 93 extending in the front and rear direction and supporting the lower part of the right side cover 3A.

[0088] <Blade protection portion of second embodiment> A blade protection part 90 of the second embodiment is shown in Fig. 32. The same members as those of the blade protection part 90 of the first embodiment are given the same reference numerals and the description thereof will be omitted.

[0089] The blade protection part 90 of the second embodiment is provided with a protection rod 94 that extends upward from the middle part of the front-rear rod 91, and then extends upward toward the rear side to the upper side of the transmission tube 13. This makes it possible to prevent twigs, etc., blown into the field from getting caught in the sliding part of the conversion part 18A. In addition, when getting on the control part 5, it is possible to prevent the operator's toes from accidentally coming into contact with the conversion part 18A, thereby improving safety when the operator gets on or off the control part 5.

[0090] 33, in order to increase the rigidity of the front-rear rod 91, it is preferable to support the rear portion of the front-rear rod 91 on the right wall of the transmission cylinder 13 via a support member 95 provided on the right wall of the transmission cylinder 13. This allows the middle portion of the front-rear rod 91 to be held in a position overlapping with the conversion unit 18A in a side view, thereby further improving the safety of the operator when boarding the control unit 5.

[0091] As shown in FIGS. 18, 19, 34 and 35, the pulling device 17, 70 is provided with a tension adjustment unit 80 that adjusts the tension of the pulling chain engaged with the drive sprocket 50.

[0092] The tension adjustment unit 80 is formed of a tension sprocket 81 and a moving unit 82 that moves the tension sprocket 81 in the vertical direction.

[0093] The moving section 82 is formed of a frame 84 fixed to a bracket 83 into which the rotating shaft 51 supporting the drive sprocket 50 is fitted, and an adjustment member 86 that moves a bracket 85, into which the rotating shaft supporting the tension sprocket 81 is fitted, in the vertical direction relative to the frame 84. As a result, when the bracket 85 is moved upward with the adjustment member 86, the tension in the pulling chain is tightened, and when the bracket 85 is moved downward with the adjustment member 86, the tension in the pulling chain is relaxed.

[0094] In side view, the frame 84 is formed in a J shape, and a hook 87 is formed extending upward from the upper part of the bracket 85, then extending rearward from the upper end, and then extending downward from the rear end. A pair of upper and lower hooks 88 are provided at a vertically intermediate part on the back of the raising device 17, shifted toward the side where the raising lug 35 raises the stalks. It is preferable to attach an elastic member made of urethane or rubber to the inner peripheral surface of the hooks 87, 88 in order to suppress vibration.

[0095] When the lifting devices 17B, 17C of the 4-row harvester or the lifting devices 70B-70E of the 6-row harvester are removed to easily remove the stalks entangled in the transport device 19 arranged behind the lifting devices 17E, etc., the hooks 87 of the lifting devices 70E, etc. can be engaged with the fasteners (not shown) of the grass body 16 provided on both the left and right sides of the harvesting device 3 as shown in Figs. 36 and 37, or with the fasteners (not shown) of the lifting guide 5A extending in the vertical direction provided in front of the step that the operator of the steering unit 5 holds when ascending and descending as shown in Fig. 38. This ensures a wide working space in front of the transport device 19, and prevents the operator from accidentally hitting his head against the lifting devices 70E, etc. In addition, it is also possible to prevent the lifting devices 70E, etc. from malfunctioning due to soil from the field adhering to the sliding parts of the lifting devices 70E, etc.

[0096] A sensor is provided near the fastener. When the sensor detects the lifting device 70E or the like being hooked to the fastener, the connection of the reaping clutch provided between the engine and the reaping device 3 is released, and the output rotation of the engine is no longer transmitted to the reaping device 3. This allows the hook 87 of the lifting device 70E or the like to be hooked to the fastener, allowing the stalks entangled in the conveying device 19 to be safely removed.

[0097] As shown in Figure 39, the hook 87 of the lifting device 70E or the like can be engaged with the opening / closing lever 4B that extends in the front-rear direction to open and close the threshing drum cover 4A that covers the upper part of the threshing drum of the threshing device 4. This can prevent soil from the field from adhering to the sliding parts of the lifting device 70E or the like, causing malfunction. It can also reduce the number of attachments such as fasteners.

[0098] As shown in Figure 40, the hook 88 of the lifting device 70E etc. can be engaged with the narrow guide 1A extending in the front-rear direction of the machine frame 1, which shifts the uncut stalks planted on the left side of the traveling direction of the combine to the left. This can prevent soil from the field from adhering to the sliding parts of the lifting device 70E etc., causing malfunction, and can prevent the lifting device 70E etc. from falling off the narrow guide 1A.

[0099] As shown in Fig. 41, a support member 26 extending upward and rearward is provided in the middle of the transmission tube 14 of the harvesting device 3, and a support member 27 extending upward is provided in the middle of the support member 26. A stay 96 is provided at the bottom of the support member 27, and a rod 97 made of round steel is provided on the stay 96, extending upward and frontward.

[0100] A left side mirror 98 is rotatably supported on the upper part of the rod 97, and a vehicle width light 99 is provided below the side mirror 98. This eliminates the need to provide a separate support member for supporting the vehicle width light 99, allowing the number of parts to be reduced.

[0101] In a side view, it is preferable that the rod 97 is shaped so that it extends upward from the stay 96, then extends rearward and upward, and then extends upward again. This makes it possible to easily change the position of the side mirror 98 by operating the rod 97 from the operation unit 5. [Explanation of symbols]

[0102] 1 Aircraft frame 3 Reaping device 4. Threshing Equipment 10. Reaping Frame 13 Transmission Cylinder (Second Transmission Cylinder) 15 Transmission Cylinder (First Transmission Cylinder) 16 minute plant 17 Raising device 17B Raising device 17C Raising device 18 Cutting blade device 18A conversion unit 19 Conveyor equipment 22 Front and rear frames 23 Frame 40 Raising Frame 41 Upper and lower transmission cylinders 41A Contact member 42 Left and right transmission cylinder 42L left connection part 42R Right connection part 43 Stay 44 Left and right frames 45L Left upper and lower frames 45R upper right and lower frame 47L Left engagement part 47R Right engagement part 48L Left clamping part 48R Right clamping part 60 Engagement part 61 Engaged part (first engaged part) 65 Upper clamping part 65A Mounting Plate 65B Pin 65C Upper clamp body 66 Lower clamping part 66A Lower clamp body 66B Engaged part (second engaged part) 70 Causes the device 70B Causes device 70C Causes Device 70D trigger device 70E Causes Device 91 Front and rear ロッド 92 Protect the プレート 94 protect ロッド

Claims

1. A combine harvester having a harvesting device (3) provided in front of a machine frame (1) on which an engine is mounted, and a threshing device (4) provided behind the harvesting device (3), A reaping frame (10) of the reaping device (3) is provided with a culm dividing body (16) for dividing the culms, a lifting device (17, 70) for raising the divided culms, a cutting blade device (18) for cutting the base of the raised culms, and a conveying device (19) for clamping the cut culms and conveying them to the threshing device (4), At least one lifting frame (40) is provided in the middle of a first transmission cylinder (15) extending in the left-right direction and disposed on the upper portion of the reaping frame (10); The raising frame (40) is formed by an upper and lower transmission cylinder (41) extending downward from the first transmission cylinder (15) and a left and right transmission cylinder (42) extending left and right from the lower part of the upper and lower transmission cylinder (41), A front and rear frame (22) is provided at a predetermined interval in the left and right direction, the front and rear frames (22) extending from a second transmission cylinder (13) disposed at the bottom of the mowing frame (10) and extending in the left and right direction toward the grass body (16), At least one or more stays (43) extending upward from the intermediate portion of a frame (23) extending in the left-right direction connecting the intermediate portions of the front and rear frames (22) are provided in the intermediate portion of the frame (23), and left and right frames (44) extending in the left-right direction from an upper portion of the stay (43), A combine harvester characterized in that the axis extending in the vertical direction of the upper and lower transmission cylinders (41) is offset from the left-right center of a pair of left and right lifting devices (17, 70) that are detachably fixed to the left and right frames (44) and the left and right transmission cylinders (42).

2. a contact member (41A) for contacting the upper part of the rear wall of the pair of left and right lifting devices (17, 70) is provided on the upper part of the vertical transmission cylinder (41); a left connecting portion (42L) for connecting rear walls of the pair of left lifting devices (17, 70) to the left of the left and right transmission cylinders (42); a right connecting portion (42R) for connecting rear walls of the right lifting devices (17, 70) of the pair of right and left transmission cylinders (42), 2. The combine harvester according to claim 1, wherein, in a side view, a front surface of the abutment member (41A), a left front surface of the left connecting portion (42L), and a right front surface of the right connecting portion (42R) are formed parallel to each other.

3. A combine harvester as described in claim 2, wherein, when viewed from the side, the front surface of the abutment member (41A), the left front surface of the left connecting portion (42L), and the right front surface of the right connecting portion (42R) are formed at a predetermined intersection angle with the axis of the upper and lower transmission cylinders (41).

4. a conversion section (18A) for converting the output rotation of a rotation shaft mounted inside the second transmission tube (13) into a swinging movement is provided on the rear side of the cutting blade device (18); 2. A combine harvester according to claim 1, further comprising a front-rear rod (91) extending from a rear portion of the front-rear frame (22) located at the rightmost position toward a right wall of the second transmission cylinder (13).

5. 5. A combine harvester according to claim 4, further comprising a rectangular protective plate (92) for preventing intrusion of twigs, provided at an intermediate portion of the front and rear rods (91) in a side view.

6. A combine harvester as described in claim 4, wherein, when viewed from the side, a protective rod (94) is provided in the middle portion of the front and rear rods (91), which extends upward, then extends upward toward the rear, passes through the right portion of the conversion portion (18A), and reaches the upper side of the second transmission cylinder (13).

7. The right side of the lifting device (17B) located second from the left side of the lifting devices (17) is disposed opposite to the left side of the lifting device (17C) located third from the left side of the lifting devices (17), The upper part of the lifting device (17B) is detachably fixed to the left part of the left-right transmission cylinder (42) by a left engaging part (47L), and the lower part is detachably fixed to the left part of the left-right frame (44) by a left clamping part (48L).

4. A combine harvester as described in claim 3, wherein the upper part of the lifting device (17C) is detachably fixed to the right part of the left and right transmission cylinders (42) by a right engaging part (47R) and the lower part is detachably fixed to the right part of the left and right frames (44) by a right clamping part (48R).

8. The right side of the lifting device (70B) located second from the left side of the lifting devices (70) is disposed opposite to the left side of the lifting device (70C) located third from the left side of the lifting devices (70), The right side of the lifting device (70D) located fourth from the left side of the lifting devices (70) is disposed opposite to the left side of the lifting device (70E) located fifth from the left side of the lifting devices (70), The upper part of the lifting device (70B) is detachably fixed to the left part of the left-right transmission cylinder (42) extending from the lower part of the left-side vertical transmission cylinder (41) by a left engaging part (47L), and the lower part is detachably fixed to the left part of the left-right frame (44) extending from the upper part of the left-side stay (43) by a left clamping part (48L). The upper part of the lifting device (70C) is detachably fixed to the right part of the left-right transmission cylinder (42) extending from the lower part of the left-side vertical transmission cylinder (41) by a right engaging part (47R), and the lower part is detachably fixed to the right part of the left-right frame (44) extending from the upper part of the left-side stay (43) by a right clamping part (48R). The upper part of the lifting device (70D) is detachably fixed to the left part of the left-right transmission cylinder (42) extending from the lower part of the right-side vertical transmission cylinder (41) by a left engaging part (47L), and the lower part is detachably fixed to the left part of the left-right frame (44) extending from the upper part of the right-side stay (43) by a left clamping part (48L). A combine harvester as described in claim 3, wherein an upper portion of the lifting device (70E) is detachably fixed to the right portion of the left-right transmission cylinder (42) extending from the lower portion of the right-side vertical transmission cylinder (41) by a right engaging part (47R), and a lower portion is detachably fixed to the right portion of the left-right frame (44) extending from the upper portion of the right-side stay (43) by a right clamping part (48R).

9. The left engaging part (47L) is formed by an engaging part (60) provided on the left / right transmission cylinder (42) and a first engaged part (61) provided on a rear surface of the raising device (17B, 70B, 70B), The right engaging part (47R) is formed by an engaging part (60) provided on the left and right transmission cylinder (42) and a first engaged part (61) provided on a rear surface of the raising device (17C, 70C, 70E), 9. A combine harvester according to claim 7 or 8, wherein the first engaged portion (61) is formed with projections and recesses.

10. The left clamping part (48L) is formed by an upper clamping part (65) and a lower clamping part (66) provided at the lower part of the lifting device (17B, 70B, 70D), The right clamping part (48R) is formed by an upper clamping part (65) and a lower clamping part (66) provided at the lower part of the lifting device (17C, 70C, 70E), The upper clamping portion (65) is provided with a pin (65B) extending in the left-right direction, The front portion of the arc-shaped upper clamping body portion (65C) of the upper clamping portion (65) is fixed to the pin (65B), A front portion of the arc-shaped lower clamping body portion (66A) of the lower clamping portion (66) is rotatably fixed to the pin (65B), A second engaged portion (66B) is provided at the rear of the lower clamping body portion (66A); 9. A combine harvester according to claim 7 or 8, wherein a rear portion of the second engaged portion (66B) is curved rearward and downward.

11. 11. The combine harvester according to claim 10, wherein an elastic member is laminated on inner peripheral surfaces of the upper clamping body portion (65C) and the lower clamping body portion (66A).

12. A combine harvester as described in claim 3, wherein the left and right transmission tubes (42) and the left and right frames (44) are connected to each other by a left upper and lower frame (45L) extending in the vertical direction, and the right and left transmission tubes (42) and the left and right frames (44) are connected to each other by a right upper and lower frame (45R) extending in the vertical direction.

13. 13. The combine harvester according to claim 12, wherein the left upper and lower frames (45L) and the right upper and lower frames (45R) are disposed parallel to a rear surface of the lifting device (17, 70) in a side view.

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