JP2003047318A - Combine harvester reaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine harvester reaper which has right, central and left pick-up cases 25A, 25B and 25C for pick-up un-reaped grain straws, takes the un-reaped grain straws of one row between the left pick-up case 25A and the central pick-up case 25C and takes the un-reaped grain straws of two rows between the right pick-up case 25B and the central pick-up case 25C, wherein the reaper can prevent that grain straws are left without being reaped due to the pick-up failure of the un-reaped grain straws on the most already reaped side. SOLUTION: A chain-projecting member 87 is disposed on the lateral side of the lower followed wheel 84 of the left pick-up case 25B on the most already reaped side. The lower portions of tine chains 82 of the left and central pick-up cases 25A and 25C are wound on one wheels 84, respectively, and the lower portion of the tine chain 82 of the right pick-up case 25B is wound on the two wheels 84 and 87. Therein, the upper driving wheel 83 of the right pick-up case 25B is disposed at a lower position than the upper driving wheels 83 of the left and central pick-up cases 25A and 25C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine harvesting device for continuously harvesting and threshing grain culms in a field.

[0002]

2. Description of the Related Art Conventionally, a chain for attaching a pull-up tine is tensioned inside through an upper drive wheel and a lower driven wheel, and the pull-up tines are rotated to the outside at a lower traveling portion and an upward straight running portion. The raising cases that project and act on the uncut culms are set up side by side in a backward tilted posture in the front part of the cutting section in the same number as the number of cutting lines to raise the uncut culms after weeding. At the same time, when cutting the uncut grain culms with the cutting blade, it supports the upper part of the cutting culms to assist the cutting.

[0003]

In the above-mentioned prior art, the same parts are used, except that the raising case parts are left-right reversed because they share the components of the raising case parts. Therefore, for example, there is a problem that the uncut grain culm on the most trimmed side is poorly raised due to a shortage of the lower traveling radius of the leading tine of the raised case on the most trimmed side, which causes uncut residue.

[0004]

Therefore, the combine harvester of the present invention is provided with left and right raising cases for raising uncut grain culms and between the left raising case and the center raising case in the traveling direction. In the combine harvester that takes in 1 row of uncut grain culm and 2 pieces of uncut grain culm between the right raising case and the center raising case, use one wheel at the lower part of the tine chains of the left and center raising cases. The bottom of the tine chain of the right raising case is wound with two wheels, and the lower turning radius of the tip of the raising tine in the right raising case on the most cut side is extended to the cut side. This is to prevent uncut areas due to poor raising.

Further, a chain to which a pull-up tine is attached is stretched inward through an upper drive wheel and a lower driven wheel, and the pull-up tine is rotated to the outside at a lower traveling portion and an upward straight running portion. In a combine harvester having a plurality of raising cases for projecting and acting on uncut grain, a chain overhanging member is provided on the side of the lower driven wheel of a predetermined raising case, and the chain is extended to the side of the lower driven wheel. The upper drive wheel of the raising case provided with the member is provided at a position lower than the upper drive wheel of the raising case not provided with the chain overhanging member laterally to the lower driven wheel, for example, the tip of the raising tine of the right raising case on the most trimmed side. The lower circulation radius is extended to the cut side to prevent uncut due to poor pulling of the uncut grain culm on the most cut side, and this is the same as the chain of the pulling case without the chain overhanging member. , And the tine of the raising case provided with the chain overhanging member and the raising tine of the raising case not provided with the chain overhanging member are kept constant without shifting to increase the cost. At the same time, it also prevents the deterioration of the performance.

A chain having a pull-up tine attached thereto is stretched inside through an upper drive wheel and a lower driven wheel, and the chain is rotated to project each pull-up tine to the outside at a lower traveling portion and an upward straight running portion. Equipped with left and right raising cases to act on the uncut grain culm, and between the left raising case and the center raising case.
In a combine harvester that takes in two rows of uncut grain culm and takes in two rows between the right raising case and the center raising case, the chain is placed on the side of the lower driven wheel of the right raising case. Providing an overhanging member, the lower part of the tine chain of the left and center raising cases is wound by one wheel, the lower part of the tine chain of the right raising case is wound by two wheels, and the upper drive wheel of the right raising case is set to the upper part of the left and center raising cases. It is installed at a position lower than the drive wheel, and the lower turning radius of the raising tine tip in the right raising case on the most mown side is extended to the mown side to prevent uncut mowing of the uncut grain culm on the most mown side. In addition, using the same chain as the chain of the raising case without the chain overhanging member, the raising tines of the raising case with the chain overhanging member and the raising case without the chain overhanging member are used. Performed kept constant without shifting the relative position of the cause tines of the scan, reduction of cost increase and Pick performance also is intended to prevent the same time.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 is a side view of the combine, FIG. 2 is a plan view of the combine, FIG. 3 is a front view of the combine,
In the figure, 1 is a track frame on which the left and right traveling crawlers 2 are mounted, 3 is a machine base installed on the track frame 1, 4 is a feed chain 5 stretched on the left side, and a handling cylinder 6 and a processing cylinder 7 are built therein. Threshing section, 8 is a mowing section that is a cutting device for three articles equipped in front of the threshing section 4, 9 is an straw processing section that faces the end of the straw chain 10, and 11 is a grain from the threshing section 4. Grain tank carried in through the fried cylinder 12; 13 discharge auger carrying out the grain in the grain tank 11; 14 driver's seat 15
A round traveling handle 17 is provided on the front side of the vehicle through a steering column 16, and a main transmission lever 19, an auxiliary transmission lever 20, a threshing clutch lever 21, and a reaping clutch lever 22 are provided on a left side column 18 of the driver's seat 15.
A driving operation unit 23 for arranging the above is an engine arranged under the driver's seat 15, and is configured to continuously cut and thresh grain culms in the field.

FIG. 4 is a side view of the mowing section, FIG. 5 is a plan view of the mowing section, FIG. 6 is an enlarged plan view of the front part of the mowing section, and FIG. 7 is a drive system diagram of the mowing section. The part 8 has three pulling cases 25A, 2 on the left and right sides and in the center of the same number as the number of cutting lines that causes three lines of uncut grain culms to be taken in through the sward plate 24.
5B and 25C are vertically arranged side by side in a rearward-reclined posture in the front part, and one left uncut grain culm for the left side is inserted between the left pulling case 25A and the central pulling case 25C, and one left side The raising of the uncut grain culm is performed by the raising tine 26A which projects rightward from the left raising case 24A and moves from the bottom to the upper side, and the right raising case 25B and the center raising case 25C.
The remaining two uncut grain culms on the right side are taken in between, and the raised tine 26 that protrudes the taken-up two uncut grain culms on the right side to the left from the right raising case 25B and moves from bottom to top.
B and the pull-up tine 26C that protrudes leftward from the central pull-up case 25C and moves from the bottom to the top.

Further, a left star wheel 27A for scraping the culm side of the uncut grain culm for the left side which has been raised to the diagonally right rear and a left sweeping belt 28A with a projection are provided on the left pulling case 25.
A right star wheel 27B for arranging the rear side of the lower part of A and for scraping the culm side of the uncut grain culm for the right side that has been raised to the left diagonal rearward and a right sweeping belt 28B with a protrusion to the right A central star wheel 27C for arranging the rear side of the lower part of the case 25B and for scraping the culm side of the uncut grain stalk for one central portion raised to the diagonally right rear and a central rake belt 28C with a protrusion. Arranged in the lower rear of the central raising case 25C,
By the right and center star wheels 27B and 27C and the scraping belts 28B and 28C with protrusions, the culm sides of the two right-side uncut grain culms which have been raised are moved to the right raising case 2
5B and the central pull-up case 25C are configured so as to be merged by being swept in the central rear portion of the introduction passage.

The star wheels 27 on the left and right and in the center
A, 28B, 28C and scraping belts 28A, 28B,
28C is equipped with a clipper-type cutting blade 29 that simultaneously cuts three culms of uncut grain stalks when scraped by 28C, and the right side 2
The lower right transport chain 30 that conveys the culm side of the cutting culm to the left diagonally rearward, and the culm side and the tip side of the cutting culm of one leftward to the diagonally right rearward, and the culm side is the lower right side. The left lower transport chain 31, the upper left transport tine 32, and the left ear tip transport tine 33, which join together near the feed end of the transport chain 30, and the three cuttings of cuttings that join near the feed end of the right lower transport chain 30. The vertical transfer chain 34 and the upper transfer tine 35 for inheriting and transferring the culm side and the tip end side of the feed chain 5 of the feed chain 5 of the threshing unit 4 are provided, and the lower right transfer chain 30 and the vertical transfer chain 34 are substantially plan view. A straight line-shaped lower conveyance path is formed at the feed start end of the feed chain 5 from the lower rear of the right raising case 25B, and the upper conveyance tine 35 is extended to the rear of the right raising case 25B.
A substantially straight upper transport path is formed from the rear of the right pull-up case 25B at the feed start end of the feed chain 5, and the left lower transport chain 3 is provided in the middle of these substantially straight upper and lower transport paths.
1 and the left upper transport tine 32, and facing the end of the left vertical transport path extending from the rear of the left pulling case 25A to the diagonally right rear, the three cuttings are cut into a Y-shaped upper case in plan view. The y-shaped grain culm transport path, which is a lowercase letter, is used to convey the grain from the mowing section 8 to the feed chain 5 of the threshing section 4 for threshing treatment.

Further, a vertical transmission case 37, which is a main harvesting frame projecting obliquely downward and forward from the front side of the threshing section 4 through a traveling mission 36 fixed to the front end of the machine base 3 and the left traveling crawler 2, is provided. The bevel gear case 38 is fixed to the upper end of the vertical transmission case 37,
8 is fixed to the left side of the chain case 39,
The left and right reaping input cases 40A and 40B, which are the fulcrums of the vertical rotation of the reaper 8, are horizontally projected from the lower part of the left side surface of 9 and the right side surface of the bevel gear case 38 in the horizontal direction of the machine body. , 40B are rotatably supported by the left and right bearing bases 41A, 41B that are vertically fixed to the front end of the machine base 3.

Further, the vertical transmission case 37 is provided with a horizontal transmission case 42 which is integrally connected to the lower end of the vertical transmission case 37 so that the middle portion is horizontally crossed at the bottom of the mowing section 8 in the lateral direction of the machine body. 43A, 43B and left and right bumper frames 44A, 44B parallel to the longitudinal direction of the fuselage form a horizontally long rectangular frame-shaped bumper 45 that surrounds the lateral transmission case 42, and the lateral transmission case is inside the bumper 45 in plan view. A bumper 45 is integrally attached directly under the lateral transmission case 42 so as to accommodate the 42, and a front bumper frame 43 is formed to be longer than the lateral transmission case 42 and the rear bumper frame 43B so as to be laid horizontally in front of the lateral transmission case 42. The front bumper frame 43 is projected to the right side of the lateral transmission case 42 in a state in which it is provided with substantially the same length as the grain culm spacing for four rows, and the front bumper frame 43 is placed in front of the lateral transmission case 42. The damper frame 43 to be cross bar.

Further, among the three grain culms to be mowed, the left outer trimming frame 45A which passes between the left grain culm and the uncut side (left side) uncut grain culm, and the three trimming lines Of the three grain culms, a left inner cutting frame 45B that passes between the left grain culm and the central grain culm, and the center grain culm and the right grain culm of the three grain culms to be cut 45C of the right inner cutting frame which passes between the right and the outer cutting which passes between the right grain culm and the already trimmed side (right side) of the three grain culms to be cut. The four cutting frames 45A, 45B, 45C and 45D of the frame 45D are connected to the front bumper frame 4
It extends in parallel from 3 toward the front of the fuselage.

Then, the grass board 24 is attached to each cutting frame 45.
Attached to the front ends of A, 45B, 45C, and 45D, the lower part of the rear surface of the left pulling case 25A is supported by the left support pipe 46A that is vertically fixed to the left outer cutting frame 45A, and the lower part of the rear surface of the right pulling case 25B is right outer cutting frame. The left support pipe 46B standingly fixed to 45D supports the lower part of the rear surface of the central raising case 25C to the left support pipe 46C standingly fixed to the left inner cutting frame 45B, and the upper surfaces of the left and right end portions of the lateral transmission case 42. From the upper side of the bevel gear case 48 fixed to the front side of the substantially central portion of the left and right transmission cases 47A and 47B and the lateral transmission case 42 so as to integrally extend upward from the front in a tilted posture. The central raising transmission case 47C is provided, and the rear upper portions of the left and right raising cases 25A, 25B, 25C are raised to the left and right and the center. Scan 47A, 47B, Pick a drive case right and center of the bevel gear case 49A is fixed to the upper end of the 47C, 49B, are supported respectively 49C, left, right, and center of the three causes cases 25A, 25B,
25C are vertically arranged side by side on the front part of the reaping section 8 in a rearwardly inclined posture and supported.

The star wheels 27 on the left and right and in the center are also provided.
A, 28B, 28C and scraping belts 28A, 28B,
28C, lower right transport chain 30, lower left transport chain 31, upper left transport tine 32, and left tip transport tine 3
3 is supported by the mowing frames 45A, 45B, 45C, 45D and the raising and transmitting cases 47A, 47B, 47C, etc., and the mowing blade 29 is arranged at the mowing frames 45A, 45B, 4
5C and 45D are laterally fixed to the lower rear side of the rear part and assembled on a cutting blade base 50 having a lateral width substantially the same as the length of the front bumper frame 43.

Then, the reaping section 8 is constructed so as to move up and down with the left and right reaping input cases 40A, 40B as a fulcrum by the expansion and contraction operation of the reaping lifting cylinder 51 which is stretched between the vertical transmission case 37 and the machine base 3. .

Further, the power of the reaping section 8 is applied to the input section for straight traveling H.
It is taken out from the PTO shaft 53 provided in the traveling mission 36 having the ST52A and the turning HST52B. Power is transmitted by belt transmission from the output shaft 54 of the engine 23 to the hydraulic pump shaft 55 of the straight HST52A, and the straight HST5.
Power is transmitted from the hydraulic pump shaft 55 of 2A to the hydraulic pump shaft 56 of the HST 52B for turning, and the hydraulic motors of the straight HST 52A and HST 52B for turning are appropriately driven to transmit the power to the traveling mission 36, and the left and right traveling crawler 2 Driving the vehicle in the same rotation direction and at the same rotation speed Forward / backward traveling of the airframe and driving the left / right crawler 2 in the opposite direction to drive the left or right turning and left / right traveling crawler 2 in the same rotation direction at different rotation speeds Is configured to do.

The left and right reaping input cases 40A, 40
The cutting input shaft 57 is inserted in B, and the right cutting input case 40B is inserted.
The reaping input shaft 57 protruding from the right end of the reamer is provided with a reaping input pulley 58, and the PTO shaft 53 of the traveling mission 36 is belt-transmitted to the reaping input shaft 57, and the tension roller of the belt transmission is used as the reaping clutch 59. Power is transmitted and disconnected freely. The reaping clutch 59 is turned on and off by the reaping clutch lever 22. Further, the vertical transmission shaft 60 is inserted into the vertical transmission case 37, and the horizontal transmission shaft 61 is inserted into the horizontal transmission case 42.
Power is transmitted from the middle part of the vertical transmission shaft 60 to the upper end of the vertical transmission shaft 60 by bevel gear transmission, and power is transmitted from the lower end of the vertical transmission shaft 60 to the middle part of the horizontal transmission shaft 61 by bevel gear transmission. Further, the left and right raising transmission shafts 62A, 62B, and 62C are inserted into the left and right raising transmission cases 47A, 47B, and 47C, and the left and right raising transmission shafts 62A, 62B are inserted from the left and right end portions of the horizontal transmission shaft 61. A transmission shaft 63 is provided at the lower end to transmit power directly by a bevel gear transmission, and forward power is taken out from the intermediate portion of the horizontal transmission shaft 61 via the bevel gear. The transmission shaft 63 is centrally raised from the front end of the transmission shaft 63 to the lower end of the transmission shaft 62C. Power is transmitted by the bevel gear transmission, and the left and right raising shafts 64A, 64B, 64C are made to protrude from the left and right and center bevel gear cases 49A, 49B, 49C to the upper inside of the left and right raising cases 25A, 25B, 25C. And the left and right and center raising transmission shafts 62A, 62B, 62
Left and right and center drive shafts 64A, 64 from the upper end of C
Bevel gear transmission is used to transmit power to B and 64C. Further, power is taken out upward from the horizontal transmission shaft 61 via the bevel gear between the input portion in the middle of the horizontal transmission shaft 61 and the output portion to the right-lifting transmission shaft 62B at the right end to drive the lower right transport chain 30 to drive the sprocket 65. A lower right transport drive shaft 66 that is driven to rotate by means of is provided, and a lower left transport drive shaft 68 that takes out power downward and an upper left transport drive shaft that takes out power upward by the same chain transmission from the middle portion of the left pull-up drive shaft 64A. 69
And the lower left transport chain 31 is rotationally driven via a drive sprocket 70 provided at the lower end of the lower left transport drive shaft 68, and the upper left transport tine 32 is rotated via a drive sprocket 71 provided above the upper left transport drive shaft 69. While driving, the left tip transporting tine 3 is further extracted from the upper end of the upper left transporting drive shaft 69 through the bevel gear in the upward direction.
A left tip transporting drive shaft 73 is provided which drives the 3 to rotate via a drive sprocket 72. The left star wheel 27A and the take-in belt 28A are provided on the lower left transport chain 31.
And the right star wheel 28B and the scraping belt 28B are interlockingly connected to the lower right conveyance chain 30 and are rotationally driven integrally therewith.
The center star wheel 28C and the scraping belt 28C are
The central star wheel 28C meshes with the right star wheel 28B to rotate and drive. Further, from the front of the left and right end portions of the lateral transmission case 42, left and right crankshafts 74, which are left and right cutting blade drive shafts for driving the cutting blade 29, which will be described later.
Left and right cutting blade drive cases 75A and 75 for inserting A and 74B
B is integrally extended forward and power is transmitted from the left and right ends of the horizontal transmission shaft 61 to the rear ends of the left and right crankshafts 74A and 74B by bevel gear transmission.

The vertical transfer chain 34 and the upper transfer tine 35 are rotatably fitted to the end of a cylindrical shaft 76 which is fixed and protrudes from the upper left side surface of the chain case 39 in parallel with the left reaping input case 40A. The rear portion is supported by the transport drive case 77, the intermediate portion is supported by the vertical transmission case 37 through a handling depth adjusting mechanism (not shown), and the vertical transport chain 34 and the upper transport tine 35 are integrated with the reaping unit 8 into the left and right reaping input cases. Four
While moving up and down with 0A and 40B as fulcrums, the mowing unit 8
Separately from the above, only the vertical transfer chain 34 and the upper transfer tine 35 are configured to perform a handling depth adjusting operation in which the vertical transfer chain 34 and the upper transfer tine 35 are swung up and down with the cylinder shaft 76 as a fulcrum. The horizontal transmission shaft 78 is inserted into the cylindrical shaft 76, and the power is transmitted from the left end of the reaping input shaft 57 to the right end of the horizontal transmission shaft 78 by the chain transmission in the chain case 39, and is also vertically conveyed to the vertical conveyance drive case 77. A common vertical transport drive shaft 79 common to the chain 34 and the upper transport tine 35 is supported in a substantially vertical direction, and power is transmitted from the left end of the horizontal drive shaft 78 to an intermediate portion of the vertical transport drive shaft 79 by a bevel gear transmission. The vertical transport chain 34 is driven to rotate via a drive sprocket 80 provided at the lower end of the transport drive shaft 79.
The upper transport tine 35 is rotationally driven via a drive sprocket 81 provided at the upper end of the shaft 9.

FIG. 8 is a front view of the right and left raising cases, and FIG. 9 is an enlarged front view of the right and center raising cases. Each raising case 25A, 25B, 25C has a raising tine 26A, 26B, The tine chain 82 for mounting the 26C at a fixed pitch so that it can be raised and lowered is attached to the raising cases 25A, 25
Lifting drive shaft 64 projecting to the upper inside of B, 25C
Upper drive sprocket 83 which is an upper drive wheel fitted to A, 64B, 64C, and raising cases 25A, 25B, 2
5C is vertically stretched inward through a lower driven roller 84, which is a lower driven wheel that is rotatably supported on a lower side of 5C via a support shaft 84a.
The tine chain 82 of C is rotated clockwise at a predetermined speed in the front view, and the tine chain 8 of the right raising case 25B is rotated.
By rotating 2 in the counterclockwise direction when viewed from the front at the same speed as the other tine chains 82, each of the raising tines 26A, 26B, 26C is raised to the tine 85 immediately before the lower traveling portion, and is brought from the tine chain 82. While standing up at a substantially right angle, the standing state is held through a tine guide (not shown) while moving the lower traveling section and the upward straight traveling section, and the pull-up tines 26A, 26B, and 26C are set to the lower traveling section and the upward straight traveling section. In the running part, the left raising case 25A and the central raising case 25 are projected to the outside of each raising case 25A, 25B, 25C.
The left uncut grain culm for one row on the left side taken in between C is raised by the left raising tine 26A protruding rightward from the raising case 24A and moving from bottom to top, and the right raising case 25B.
And the central pulling case 25C between the right pulling case 25B and the central pulling case 25C, the pulling tine 26B protruding leftward from the right pulling case 25B and moving leftward from the central pulling case 25C. It is configured so as to be performed by the raising tines 26C that project and move from the bottom to the top.

Further, the tension roller 86 of the tine chain 82 can be raised to the lateral side of the downward rotation side of the drive sprocket 83, and can be vertically swung within a predetermined range with the drive shafts 64A, 64B and 64C as fulcrums, and is not shown. The tension spring force is supported via a not-shown tension arm that constantly urges the tension spring force upward, and the slack of the tine chain 82 is removed by the tension roller 86.

A chain extension roller 87, which is a chain extension member, is provided on the lower rotation side of the lower driven roller 84 of the right pulling case 25B, and a left pull-up tine 26B is provided between the chain extension roller 87 and the lower driven roller 84. To form a lateral movement section 88 that linearly laterally moves in the middle of lower traveling, and to extend the tine chains 82 of the left and center raising cases 25A and 25C in a triangular shape by three-point tensioning of the upper one wheel and the lower two wheels. On the other hand, the tine chain 82 of the right raising case 25B is stretched in a quadrangular shape by four-point tensioning of the upper two wheels and the lower two wheels, and the lower turning radius of the tip of the raising tine 26B in the right raising case 25B on the most trimmed side is raised to act side. It is extended to the already-cut side which is the opposite side to the side opposite to the action side by raising the scraping (uptake) action range of the uncut grain culm in the lower circulation part of the left raising tine 26A. The tine chain 82 of the right pulling case 25B provided with the chain overhanging roller 87 is configured to be extended to the cut side to prevent the uncut grain of the cut side closest to the cut side due to the pulling failure. Is the same as the tine chain 82 of the left and center raising cases 25A and 25C without the chain extending roller 87, and the raising tine 25B and the chain extending roller 87 of the raising case 25B provided with the chain extending roller 87. Raising tine 2 of the raising cases 25A and 25C not provided with
In order to keep the relative positions of 6A and 26B constant without shifting, the upper drive sprocket 8 of the right raising case 25B
The distance from the point of turning of the lower driven roller 84 to the point of turning of the lower driven roller 84 to the point of turning upward of the lower driven roller 84 is the chain extending roller 8 in the right pull-up case 25B.
7 is provided, the downward rotation of the lower driven roller 84 is changed to the upward rotation from the point where the upper drive sprocket 83 of the left and center raising cases 25A and 25C not provided with the chain extending roller 87 is changed from the upward rotation to the downward rotation. Only the dimension T, which is longer than the distance to the turning point,
The upper drive sprocket 83 and the tension roller 86 of the right raising case 25B provided with the chain extending roller 87
The upper drive sprocket 8 of the left and center raising cases 25A and 25C without the chain extending roller 87.
3 and the tension roller 86.

FIG. 10 is a partially enlarged plan view of the cutting blade, FIG. 11 is a drive explanatory view of the cutting blade, and FIG. 12 is a sectional view of the knife head portion of the cutting blade. As shown in FIGS. 5 and 6, Cutting blade 29
Is formed by dividing one fixed blade portion 89 having a cutting width of four rows and a movable blade portion having a cutting width of four rows to be superposed on the fixed blade portion 89 into substantially left and right portions at a central portion. The left and right movable blades 90A and 90B each have a cutting width of approximately two rows. The fixed blade 89 is formed by riveting a large number of fixed blades 91 to the cutting blade base 50 at a constant pitch. Parts 90A, 9
0B is a knife bar 9 having a width approximately half that of the cutting blade 50.
2, a plurality of movable blades 93 for riveting from the end of the knife bar 92 at the same pitch as the fixed blade 91, and a knife head 94 for riveting to the knife bar 92 together with several movable blades 93. Plural blade retainers that are tightened and fixed together with friction plates and adjustment plates with bolts and nuts
5, the left and right movable blade portions 90A, 90B are supported on the upper surface of the fixed blade portion 89 so as to be reciprocally movable only in the lateral direction of the machine body.

Further, a left cutting blade drive case 75A in which a main shaft (journal) 96A of a left crank blade 74A, which is a left cutting blade drive shaft for reciprocally driving the left movable blade portion 90A from the front surface of the left end portion of the lateral transmission case 42, is inserted. The left cutting by inserting the main shaft (journal) 96B of the left crank shaft 74B, which is the left cutting blade drive shaft for reciprocally driving the right movable blade portion 90B from the front surface of the right end portion of the lateral transmission case 42, while extending forwardly. Left crankshaft 7 that integrally extends the blade drive case 75B forward and projects from the front end of the left cutting blade drive case 75A
The base end of the crank arm 97A of the left crank shaft 74A is fitted and fixed to the front end of the main shaft 96A of the 4A.
Left crankshaft 74A parallel to main shaft 96A from the tip of 7A
The right crankshaft 74B at the front end of the main shaft 96B of the right crankshaft 74B while projecting the crankpin 98A of the right crankshaft forward from the front end of the right cutting blade drive case 75B.
The base end of the crank arm 97B of B is fitted and fixed, the crank pin 98B of the right crank shaft 74B is projected forward from the tip of the crank arm 97B in parallel with the main shaft 96B, and the main shaft 96A of the left crank shaft 74A is attached. The rear end is exposed to the inside of the left end portion of the horizontal transmission case 42, and the rear end of the main shaft 96A of the left crank shaft 74A is interlockingly connected to the left end portion of the horizontal transmission shaft 61 via bevel gears 99A and 99B, and the right crank shaft 74B is also connected. The rear end of the main shaft 96B of the
The rear end of the main shaft 96B of the right crankshaft 74B at the right end of the lateral transmission shaft 61.
Bevel gear 100 that meshes with 9A and 99B in the same direction
The left crankshaft 74A and the main shaft 96B and the crank arm 97B, which are connected to each other through A and 100B, are composed of the main shaft 96A, the crank arm 97A, and the crank pin 98A.
The right crankshaft 74B, which is the same as the left crankshaft 74A composed of the crankpin 98B, is rotated at the same speed in the same one direction, and the rotation position of the crankpin 98A of the left crankshaft 74A and the crankpin 98B of the right crankshaft 74B. The phases of the left and right crankshafts 74A and 74B are set to 180 degrees or about 1 so that the rotational positions differ by 180 degrees or about 180 degrees.
Rotate them by 80 degrees and rotate in the same direction at the same speed.

Then, a guide rail 101 having a U-shaped cross section with the open portion facing rearward is vertically installed and fixed to the rear ends of the knife heads 94 of the left and right movable blade portions 90A at right angles to the main shafts 96A and 96B of the left and right crankshafts 74A and 74B. With the left and right crankshafts 74A and 74B being different in phase by 180 degrees or approximately 180 degrees, the crank pin 9 of the left crankshaft 74A is
8A is fitted through the bearing 102A,
The crank pin 98B of the right crank shaft 74B is fitted through the bearing 102B, and the phase is 180 degrees or approximately 18 degrees.
The left and right movable blade portions 90 are rotated by the left and right crankshafts 74A and 74B that are different from each other by 0 degree and rotate in the same one direction at the same speed.
A and 90B are reciprocally driven in opposite directions, and the crankshaft 7 is vibrated in the left-right direction by the clipper type cutting blade 29.
Vibrations in the direction orthogonal to 4A and 74B are also reduced at the same time.

The rotational loci of the axes of the crank pins 98A and 98B of the left and right crankshafts 74A and 74B are the mating surfaces 103 of the fixed blade portion 89 and the left and right movable blade portions 90A and 90B.
Left and right crankshafts 74A, 7
4B is rotated above the mating surface 103 of the fixed blade portion 89 and the left and right movable blade portions 90A and 90B to move the left and right movable blade portions 90.
A and 90B are configured to prevent the cutting performance from being deteriorated by applying a force for lifting the blade edge from the fixed blade portion 89.

Further, a left cutting blade drive case 75A into which a main shaft (journal) 96A of a left crank blade 74A which is a left cutting blade drive shaft for reciprocally driving the left movable blade portion 90A from the front surface of the left end portion of the lateral transmission case 42 is inserted. The left cutting by inserting the main shaft (journal) 96B of the left crank shaft 74B, which is the left cutting blade drive shaft for reciprocally driving the right movable blade portion 90B from the front surface of the right end portion of the lateral transmission case 42, while extending forwardly. The blade drive case 75B is integrally extended forward, and is disposed below the left and right star wheels 27A and 27B which are scraping members for raising the entire left and right crankshafts 74A and 74B and scraping the subsequent grain culms, It prevents the left and right crankshafts 74A and 74B from being caught in the cuttings and lowering the conveying performance, and the left and right crankshafts 74A and 74B are covered with straw chips or wound. It is configured to prevent.

[0028]

As is apparent from the above embodiments, the present invention is provided with the left and right raising cases 25 for raising uncut grain culms.
A, 25B and 25C are provided, and one row of uncut grain culms is inserted between the left raising case 25A and the center raising case 25C, and two rows of uncut grain are inserted between the right raising case 25B and the center raising case 25C. In the combine harvester that takes in the culm,
Tine chain 8 of left and center raising cases 25A, 25C
2 The lower part is wound with one wheel 84, and the lower part of the tine chain 82 of the right raising case 25B is wound with the two wheels 84, 87, so that the lower turning radius of the tip of the raising tine 26B in the right raising case 25B on the most trimmed side can be reduced. It is extended to the already-cutted side, and it has an effect of preventing uncut residue due to poor raising of uncut grain culms on the most-cutted side.

Further, the chain 8 to which the raising tines 26 are attached
2 is stretched inwardly via an upper drive wheel 83 and a lower driven wheel 84, and the chain 82 is rotated to cause each raising tine 26 to project to the outside at the lower traveling portion and the upward straight traveling portion, and the uncut grain In a combine harvesting device including a plurality of raising cases 25 that act on culms, a chain overhanging member 87 is provided on the side of the lower driven wheel 84 of a predetermined raising case 25B, and a chain overhanging member extends to the side of the lower driven wheel 84. The upper drive wheel 83 of the raising case 25B provided with 87 is connected to the lower driven wheel 8
4 Raising case 2 that does not have the chain overhanging member 87 on the lateral side
By being provided at a position lower than the upper drive wheels 83 of 5A and 25C, for example, the lower turning radius of the tip of the raising tine 26B in the right raising case 25B on the most cut side is extended to the cut side, and the uncut on the most cut side is cut. It is possible to prevent uncut residue due to defective raising of the grain culm, and to use the same chain 82 as the chain 82 of the raising cases 25A and 25C without the chain extending member 87, and further to use the chain extending member 87.
The raising tines 26B of the raising case 25B provided with and the raising cases 25A and 25 not provided with the chain projecting member 87.
The relative position of C with respect to the raising tines 26A and 26C is kept constant without shifting, and the effect of being able to prevent an increase in cost and a decrease in raising performance at the same time is achieved.

Further, the chain 8 to which the raising tines 26 are attached
2 is stretched inwardly via an upper drive wheel 83 and a lower driven wheel 84, and the chain 82 is rotated to cause each raising tine 26 to project to the outside at the lower traveling portion and the upward straight traveling portion, and the uncut grain Left and right raising cases 25A, 25 to act on the culm
Equipped with B and 25C, one row of uncut grain culm is inserted between the left raising case 25A and the center raising case 25C, and two rows of uncut grain culm are inserted between the right raising case 25B and the center raising case 25C. In the combine harvesting device to be taken in, a chain overhanging member 87 is provided on the side of the lower driven wheel 84 of the right raising case 25B, and the lower portion of the tine chain 82 of the left and center raising cases 25A and 25C is wound by one wheel 84, and the right wheel is wound. The lower part of the tine chain 82 of the raising case 25B is wound with two wheels 84 and 87, and the upper drive wheel 83 of the right raising case 25B is
Upper drive wheels 83 of left and center raising cases 25A, 25C
By setting it at a lower position, the lower turning radius of the tip of the raising tine 26B in the rightmost raising case 25B on the most mown side is extended to the mown side, and the uncut grain of the most mown side is left uncut due to a defective raising. The pull-up cases 25A and 25C without the chain overhanging member 87
Using the same chain 82 as that of the above-mentioned chain 82, and relative to the raising tines 26A of the raising case 25B provided with the chain overhanging member 87 and the raising tines 26A, 26C of the raising cases 25A, 25C not including the chain overhanging member 87. The position is kept constant without being displaced, and it is possible to simultaneously prevent an increase in cost and a decrease in the raising performance.

[Brief description of drawings]

[Figure 1] Side view of combine

[Fig. 2] Plan view of the combine

[Figure 3] Front view of the combine

FIG. 4 is a side view of the mowing unit.

FIG. 5 is a plan view of the mowing unit.

FIG. 6 is an enlarged plan view of the front part of the reaping unit.

[Fig. 7] Drive system diagram of the mowing unit

FIG. 8 is a front view of the left, right, and center raising cases.

FIG. 9 is an enlarged front view of the right and center raising cases.

FIG. 10 is a partially enlarged plan view of a cutting blade.

FIG. 11 is an explanatory view of driving the cutting blade.

FIG. 12 is a sectional view of a knife head portion of a cutting blade.

[Explanation of symbols]

25A, 25B, 25C raising case 26A, 26B, 26C raised tines 82 Chain 83 Upper drive wheel (upper drive sprocket) 84 Lower driven wheel (lower driven roller) 87 Chain overhang member (chain overhang roller)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shigeru Tsushima             Seirei Industrial Co., Ltd. 428 Enami, Okayama City, Okayama Prefecture             Inside the company (72) Inventor Yuichi Shinfuku             1-32 Chayamachi, Kita-ku, Osaka Yanmar Agricultural Machinery Co., Ltd.             Inside the company F term (reference) 2B081 AA01 BB05 CC17 DD07 DD57

Claims (3)

[Claims] 1. A left and right raising case for raising uncut grain culms is provided, and one row of uncut grain culms is inserted between the left raising case and the center raising case. In a combine harvester that takes in two uncut grain culms in between, the lower part of the tine chain of the left and center raising cases is wound with one wheel, and the lower part of the tine chain of the right raising case is divided into two.
A combine harvester characterized by being wound around a wheel. 2. A chain to which a pull-up tine is attached is stretched inward through an upper drive wheel and a lower driven wheel, and the pull-up tine is rotated to the outside at a lower traveling portion and an upward straight running portion. In a combine harvester having a plurality of raising cases for projecting and acting on uncut grain, a chain overhanging member is provided on the side of the lower driven wheel of a predetermined raising case, and the chain is extended to the side of the lower driven wheel. A combine harvester, wherein the upper drive wheel of the raising case provided with the member is provided at a position lower than the upper drive wheel of the raising case not provided with the chain overhanging member laterally to the lower driven wheel. 3. A chain to which a pull-up tine is attached is tensioned inside through an upper drive wheel and a lower driven wheel, and the pull-up tine is rotated to the outside at a lower traveling portion and an upward straight running portion. Equipped with left and right raising cases to project and act on uncut culms, one row of uncut culms is inserted between the left raising case and the center raising case, and between the right raising case and the center raising case. In a combine harvester that takes in two rows of uncut grain culm, beside the lower driven wheel of the right pulling case,
A chain overhanging member is provided, and the lower part of the tine chain of the left and center raising cases is wound with one wheel, the lower part of the tine chain of the right raising case is wound with two wheels, and the upper drive wheel of the right raising case is connected with the left and center raising cases. A combine harvester which is provided at a position lower than the upper drive wheel.