combine

Abstract

To provide a combine which can prevent falling of a chain having a tug for pulling up grain culm of a reaping device and can quickly restart the reaping device by quickly returning a pullup device to a stored position after removing the grain culm stuck in the reaping device.SOLUTION: Intermediate pullup devices (31B, 31C) located in a middle of left-right directions of pullup devices (31A, 31B, 31C, 31D) and a transmission cylinder (24) are connected to each other by a support arm (61). The support arm (61) is formed of a first vertical arm (70), a second vertical arm (72) and a third vertical arm (74). Vertical members (120, 220) extending in a vertical direction are arranged in external peripheral parts of opposite openings of the third vertical arm (74), and upper parts of the vertical members (120, 220) are connected to each other by a lateral member (121) which extends in the left-right direction, and lower parts of tension rods (122, 222) arranged on both sides of the lateral member (121) and tip parts of tension arms (115, 215) are connected to each other by energization members (123, 223).SELECTED DRAWING: Figure 38

Description

[Technical field]

[0001] The present invention relates to a combine harvester equipped with a lifting device for lifting divided culms. [Background technology]

[0002] In conventional combine harvesters, a transmission tube provided above the harvesting device and a pair of lifting devices provided with the non-lifting side facing each other are connected by a support arm, and when removing stalks stuck in a conveying device provided behind the lifting device, a technique was known in which the connection between the lifting device and the transmission part of the transmission tube is released, and the first and second horizontal arms of the support arm are rotated to move the lifting device forward (see Patent Document 1).

[0003] Also, a technology was known in which a support arm connects the left-right centers of a transmission tube provided above the harvesting device and a pair of lifting devices provided with the non-lifting sides facing each other, and when removing stalks stuck in a conveying device or the like provided behind the lifting devices, the lifting devices are rotated clockwise or counterclockwise around the axis of the support arm (see Patent Document 2).

[0004] Furthermore, a technology has been known in which a support arm connects the left-right centers of a transmission tube provided above the harvesting device and a pair of lifting devices provided with the non-lifting sides facing each other, and when removing stalks stuck in a conveying device or the like provided behind the lifting devices, the left lifting device is rotated clockwise around the axis of the support arm to move the left part of the lifting device forward, and the right lifting device is rotated counterclockwise to move the right part of the lifting device forward (see Patent Document 3). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2012-29568 A [Patent Document 2] JP 2012-139118 A [Patent Document 3] JP 2013-99301 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the technique of Patent Document 1 has a problem that the pair of lifting devices and the transmission part of the transmission tube must be reconnected after removing the clogged stalks, so the lifting devices cannot be quickly re-driven. Also, there is a risk that the first and second horizontal arms of the support arms will rotate quickly against the operator's will, causing the lifting devices to suddenly move forward.

[0007] Furthermore, the technology of Patent Document 2 has the problem that it is not possible to form a large working space in front of the conveying device, etc., and therefore it is not possible to easily remove the clogged stalks.

[0008] Furthermore, the technology of Patent Document 3 also has the problem that it is not possible to form a large working space in front of the conveying device, etc., and therefore it is not possible to easily remove the clogged stalks.

[0009] Therefore, the main object of the present invention is to provide a combine harvester that can prevent the chain having a tag that lifts the stalks of the harvesting device from falling off, and that can quickly return the lifting device to its stored position after removing the stalks stuck in the harvesting device, thereby quickly restarting the harvesting device. [Means for solving the problem]

[0010] The present invention which has solved the above problems is as follows.

[0011] 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 (E) is mounted, and a threshing device (4) is provided on the rear left side of the harvesting device (3), The reaping device (3) is arranged in a left-right direction and is used to raise the culms in the field. EndThe threshing machine is formed of a lifting device (31A, 31B, 31C, 31D) for lifting the culm, a cutting blade device (32) for cutting the base of the culm, and a conveying device (33) for conveying the cut culm toward the threshing device (4). A transmission tube (24) is provided above the lifting devices (31A, 31B, 31C, 31D) and extending in the left-right direction. Of Located in the middle in the left-right direction Two Intermediate lifting device (31B, 31C) teeth, Support Arm(61) By Transmission cylinder(24) In a state where it can be moved relative to Supported The intermediate raising device (31B, 31C) includes vertical members (120, 220) connected to the support arm (61) and extending vertically from each of the intermediate raising devices (31B, 31C), and a horizontal member (121) connecting the vertical members (120, 220). The intermediate raising device (31B, 31C) includes a chain (110, 210) having a lug for raising the stalk, and a tension rod (122, 222) for applying tension to the chain (110, 210) is connected to the horizontal member (121). This is a combine harvester characterized by the above. Effect of the Invention

[0012] According to the invention described in claim 1 ,blood En(110,210) No Procket etc. This prevents the culms from falling off the stems, and enables efficient raising of the culms. [Brief description of the drawings]

[0013] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a front view of the harvesting device in a stored position. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] A perspective view of the reaping device. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. [Figure 13] FIG. 4 is an explanatory diagram of a transmission case of the lifting device. [Figure 14] FIG. [Figure 15] FIG. 4 is a front view of the lifting device with its upper portion pulled out forward. [Figure 16] FIG. 4 is a left side view of the lifting device with its upper portion pulled out forward. [Figure 17] (a) and (b) are the fixed plate, (c) and (d) are the rotating plate, and (e) and (f) are the cross-sectional view and the left side view of the pin. [Figure 18] FIG. 13 is a perspective view of a first embodiment of a connecting part for preventing rotation of the horizontal arm; [Figure 19] FIG. [Figure 20] FIG. [Figure 21] FIG. 13 is a perspective view of a first embodiment of a connecting part for preventing rotation of the transverse arm; [Figure 22] FIG. [Diagram 23] FIG. [Figure 24] FIG. 4 is a front view of the mowing device in an open position moved forward. [Diagram 25] FIG. [Figure 26] FIG. [Figure 27] FIG. [Figure 28] 1 is a front view of the mowing device in an open position moved forward and to the left; FIG. [Figure 29] FIG. [Diagram 30] FIG. [Diagram 31] FIG. [Diagram 32] 1 is a front view of the mowing device in an open position moved forward and to the right. FIG. [Diagram 33] FIG. [Diagram 34] FIG. [Diagram 35] FIG. [Diagram 36] FIG. 4 is a left side view of the left stock base transport device. [Figure 37] FIG. [Figure 38] FIG. 4 is a front view of the lifting device provided in the middle in the left-right direction. [Figure 39] FIG. [Diagram 40] FIG. 2 is an enlarged front view of the upper portion of the lifting device. [Diagram 41] FIG. 4 is an enlarged left side view of the upper portion of the lifting device. [Diagram 42] FIG. 2 is an enlarged plan view of the upper portion of the lifting device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] 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, provided below a machine frame 1, and a reaping device 3 that harvests stalks in a field, provided in front of the machine frame 1. In addition, a threshing device 4 that threshes and sorts the stalks harvested by the reaping device 3 is provided on the rear left side of the reaping device 3, and a control unit 5 on which an operator rides is provided on the rear right side of the reaping device 3.

[0015] An engine room 6 in which an engine E is mounted is provided below the control unit 5, and a grain tank 7 for storing grains that have been threshed and sorted by the threshing device 4 is provided behind the control unit 5. The grains stored in the grain tank 7 are discharged to the outside by a discharge auger 8 connected to the grain tank 7.

[0016] A front panel 10 is provided in front of the cockpit of the control section 5, and a side panel 15 is provided to the left of the cockpit.

[0017] A monitor 11 that displays the output rotation of the engine E, etc. is provided in the center of the front panel 10, and an operating lever 12 that controls the rotation of the traveling device 2 and the raising and lowering of the harvesting device 3 is provided on the right side of the monitor 11.

[0018] A main speed change lever 16 is provided at the front of the side panel 15 to operate a continuously variable transmission that increases / decreases the output rotation of the engine E and switches the rotation direction, and a sub-speed change lever 17 is provided behind the main speed change lever 16 to operate a transmission that increases / decreases the output rotation of the continuously variable transmission.

[0019] As shown in Figs. 3 to 7, the reaping device 3 is attached to a reaping frame 20, which is a main frame. The reaping frame 20 is formed of a transmission tube 21 extending in the front-rear direction, a transmission tube 22 extending in the left-right direction provided in front of the transmission tube 21, a transmission tube 23 extending in the up-down direction provided on the left of the transmission tube 22, and a transmission tube 24 extending in the left-right direction provided on the upper part of the transmission tube 23. The rear part of the transmission tube 21 is supported so as to be swingable by a transmission tube 25 extending in the left-right direction provided in front of the threshing device 4 to which the output rotation of the engine E is transmitted. This allows the front part of the transmission tube 21, i.e., the reaping device 3 to be raised and lowered in the up-down direction via the reaping frame 20 by driving a lifting cylinder (not shown) connected to the transmission tube 21. The transmission tubes 21 to 25 are provided with rotating shafts 21A to 25A to which the output rotation of the engine E or the like is transmitted.

[0020] The harvesting device 3 is composed of a dividing body 30 that divides the culms planted in the field, a raising device 31 that raises the divided culms, a cutting blade device 32 that cuts the raised culms, and a transport device 33 that clamps the cut culms and transports them to the threshing device 4.

[0021] The raising device 31 is provided with four raising devices 31A, 31B, 31C, and 31D in that order from the left. This allows the raising device 31A and the raising device 31B to raise the culms planted in one row, and the raising device 31C and the raising device 31D to raise the culms planted in the one row adjacent to the right side of the one row. The raising device 31B and the raising device 31C are connected via a connecting member (not shown).

[0022] Furthermore, reference numeral 39 denotes an auxiliary lifting device that assists the lifting work of the stalks by the lifting device 31A and the lifting device 31B, etc.

[0023] The cutting blade device 32 is made up of a left cutting blade device 32A provided on the left side of the cutting device 3 and a right cutting blade device 32B provided on the right side.

[0024] The transport device 33 is made up of a stalk base transport device 34 that clamps and transports the stalk of the harvested culm, and a tip transport device 35 that clamps and transports the tip of the harvested culm. The stalk base transport device 34 is made up of a left stalk base transport device 34A provided on the left side of the harvesting device 3 and a right stalk base transport device 34B provided on the right side, and the tip transport device 35 is made up of a left tip transport device 35A provided on the left side of the harvesting device 3 and a right tip transport device 35B provided on the right side.

[0025] In this specification, the left stock base transport device 34A and the left ear tip transport device 35A are collectively referred to as the left transport device 33A, and the right stock base transport device 34B and the right ear tip transport device 35B are collectively referred to as the right transport device 33B.

[0026] A support arm 60 is provided on the left side of the transmission tube 24, connecting the lower part of the transmission tube 24 to the upper part of the rear surface of the lifting device 31A, a support arm 61 is provided on the middle part of the transmission tube 24, connecting the lower part of the transmission tube 24 to the lifting device ("intermediate lifting device" in the claims) 31B and the upper part of the rear surface of the lifting device ("intermediate lifting device" in the claims) 31C, and a support arm 62 is provided on the right side of the transmission tube 24, connecting the lower part of the transmission tube 24 to the upper part of the rear surface of the lifting device 31D. Inside the support arms 60-62, a rotating shaft (not shown) is provided to transmit the output rotation of the engine E or the like.

[0027] The support arm 60 extends downward from the lower part of the transmission tube 24, then curves forward and is connected to the rear surface of the lifting device 31A. The support arm 62 extends downward from the lower part of the transmission tube 24, then curves forward and is connected to the rear surface of the lifting device 31D.

[0028] The support arm 61 is formed of a vertical arm (the ``first vertical arm'' in the claims) 70 extending downward from the lower part of the transmission tube 24, a horizontal arm (the ``first horizontal arm'' in the claims) 71 supported so as to be freely rotatable on the lower part of the vertical arm 70, a vertical arm (the ``second vertical arm'' in the claims) 72 extending downward from the lower part of the tip of the horizontal arm 71, a horizontal arm (the ``second horizontal arm'' in the claims) 73 supported so as to be freely rotatable on the lower part of the vertical arm 70, and a vertical arm (the ``third vertical arm'' in the claims) 74 extending downward from the lower part of the tip of the horizontal arm 73 and then curving forward to be connected to the rear surfaces of the lifting device 31B and the lifting device 31C. As a result, when removing stalks stuck in the conveying device 33, etc., as shown in Figure 27, the lifting device 31B and the lifting device 31C can be moved forward to increase the working space in front of the conveying device 33, making it easy to remove the stalks stuck in the conveying device 33.

[0029] When the support arm 61 is in the stored position, the longitudinal direction of the horizontal arm 71 and the longitudinal direction of the horizontal arm 73 extend in the left-right direction along the transmission tube 24 and are provided on the rear side of the lifting device 31B and the lifting device 31C. This makes it possible to prevent the stalks, etc., lifted by the lifting device 31A and the lifting device 31B from becoming entangled in the horizontal arm 71 and the horizontal arm 73.

[0030] <Transmission of engine output rotation> As shown in FIG. 8, the output rotation of the engine E is transmitted to a rotating shaft 25A mounted inside a transmission cylinder 25 via a belt 40 or the like.

[0031] The output rotation transmitted to the rotating shaft 25A is transmitted to the right tip conveying chain 35b of the right tip conveying device 35B via a gear 41 etc. provided in the middle part of the rotating shaft 25A. The output rotation transmitted to the rotating shaft 25A is also transmitted to the rotating shaft 21A installed in the transmission tube 21 via a gear 42 etc. provided on the right side of the rotating shaft 25A.

[0032] The output rotation transmitted to the rotating shaft 21A is transmitted to the right stock base conveying chain 34b of the right stock base conveying device 34B via a gear 43 etc. provided in the middle of the rotating shaft 21A. The output rotation transmitted to the rotating shaft 21A is also transmitted to the rotating shaft 22A installed in the transmission tube 22 via a gear 44 etc. provided in the front part of the rotating shaft 21A.

[0033] The output rotation transmitted to the rotating shaft 22A is transmitted to the left cutting blade device 32A via a swing rod 56 etc. provided on the left side of the rotating shaft 22A, and is transmitted to the right cutting blade device 32B via a swing rod 57 etc. provided on the right side of the rotating shaft 22A. The output rotation transmitted to the rotating shaft 22A is transmitted to the rotating shaft 23A mounted inside the transmission tube 23 via a gear 45 etc. provided on the left side of the rotating shaft 22A.

[0034] The output rotation transmitted to the rotating shaft 23A is transmitted to the left stalk base conveying chain 34a of the left stalk base conveying device 34A and the left ear tip conveying chain 35a of the left ear tip conveying device 35A via a gear 46 etc. provided in the middle of the rotating shaft 23A. Reference numeral 37 denotes a supply chain of a supply device that transfers the stalks conveyed to the rear of the conveying device 33 to the threshing device 4, and reference numeral 38 denotes an adjustment chain of an adjustment device that adjusts the position of the stalks conveyed by the conveying device 33.

[0035] The output rotation transmitted to the rotating shaft 23A is transmitted to the rotating shaft 24A mounted within the transmission tube 24 via a gear 47 provided at the front of the rotating shaft 23A and a gear box 48, etc.

[0036] The output rotation transmitted to the rotating shaft 24A is transmitted to the rotating shaft 81 via the gears 50 and 80 provided on the left side of the rotating shaft 24A, and the output rotation transmitted to the rotating shaft 81 is transmitted to the lifting device 31A via the gear 82.

[0037] The output rotation transmitted to the rotating shaft 24A is transmitted to a rotating shaft (the "first rotating shaft" in the claims) 75A via a gear 51 and a gear 84 provided in the middle of the rotating shaft 24A, the output rotation transmitted to the rotating shaft 75A is transmitted to a rotating shaft (the "second rotating shaft" in the claims) 77A via a gear (the "first gear" in the claims) 75, a counter gear (the "first counter gear" in the claims) 76, and a gear (the "second gear" in the claims) 77U, and the output rotation transmitted to the rotating shaft 77A is transmitted to a rotating shaft (the "third gear" in the claims) 79A via a gear (the "third gear" in the claims) 77D, a counter gear (the "second counter gear" in the claims) 78, and a gear (the "fourth gear" in the claims) 79. Gear 84 is provided on the upper part of rotating shaft 75A, and gear 75 is provided on the lower part of rotating shaft 75A. Gear 77U is provided on the upper part of rotating shaft 77A, and gear 77D is provided on the lower part of rotating shaft 77A.

[0038] The output rotation transmitted to the rotating shaft 79A is transmitted to the rotating shaft 87 via gears 85 and 86, and the output rotation transmitted to the rotating shaft 87 is transmitted to the raising device 31B via gear 88 provided on the left part of the rotating shaft 87, and is transmitted to the raising device 31C via gear 89 provided on the right part of the rotating shaft 87. The gear 79 is provided on the upper part of the rotating shaft 79A, and the gear 85 is provided on the lower part of the rotating shaft 75A.

[0039] The output rotation transmitted to the rotating shaft 24A is transmitted to the rotating shaft 91 via the gear 52 and the gear 90 provided on the right side of the rotating shaft 24A, and the output rotation transmitted to the rotating shaft 91 is transmitted to the lifting device 31D via the gear 92.

[0040] This allows the output rotation of the engine E to be transmitted to the raising devices 31A to 31D, the cutting blade device 32, and the transport device 33.

[0041] <Support arm> 9, the horizontal arm 71 is provided with a gear 75, a counter gear 76, and a gear 77U. The gear 75 is supported by a rotating shaft 75A extending vertically at the right part of the horizontal arm 71, the counter gear 76 is supported by a counter shaft (the "first counter shaft" in the claims) 76A extending vertically at the middle part of the horizontal arm 71, and the gear 77U is supported by a rotating shaft 77A extending vertically at the left part of the horizontal arm 71. The rotating shaft 77A is formed to extend from the upper side of the left part of the horizontal arm 71 to the lower side of the left part of the horizontal arm 73.

[0042] The rotating shaft 75A is rotatably supported by the horizontal arm 71, the counter shaft 76A is rotatably supported by the horizontal arm 71, and an upper portion of the rotating shaft 77A is rotatably supported by the horizontal arm 71.

[0043] The horizontal arm 73 is provided with a gear 77D, a counter gear 78, and a gear 79.

[0044] The gear 77D is supported by a rotating shaft 77A extending vertically from the left part of the horizontal arm 73, the counter gear 78 is supported by a counter shaft (referred to as the "second counter shaft" in the claims) 78A extending vertically from the middle part of the horizontal arm 73, and the gear 79 is supported by a rotating shaft 79A extending vertically from the right part of the horizontal arm 73.

[0045] The lower portion of the rotating shaft 77A is rotatably supported by the horizontal arm 73, the counter shaft 78A is rotatably supported by the horizontal arm 73, and the rotating shaft 79A is rotatably supported by the horizontal arm 73.

[0046] The pitch circles of gear 75 and gear 77U are formed to have the same diameter. This allows the rotation angle of gear 75 and the rotation angle of gear 77U to be the same. In addition, one counter gear 76, which is an odd number, is provided between gear 75 and gear 77U. This allows the rotation direction of gear 75 and the rotation direction of gear 77U to be set to the same direction. Note that two or more counter gears 76 can be provided between gear 75 and gear 77U, and when an even number of counter gears 76 are provided, the rotation direction of gear 75 and the rotation direction of gear 77U can be set to be opposite to each other.

[0047] The pitch circles of gear 77D and gear 79 are formed to have the same diameter. This allows the rotation angle of gear 77D to be the same as the rotation angle of gear 79. In addition, one counter gear 78, which is an odd number, is provided between gear 77D and gear 79. This allows the rotation direction of gear 77D and the rotation direction of gear 79 to be set to the same direction. Note that two or more counter gears 78 can be provided between gear 77D and gear 79, and when an even number of counter gears 78 are provided, the rotation direction of gear 77D and the rotation direction of gear 79 can be set to be opposite to each other.

[0048] In this embodiment, the pitch circles of the gear 75, counter gear 76, gear 77U, gear 77D, counter gear 78, and gear 79 are formed to have the same diameter. This improves the interchangeability of the gears 75 and the like, and allows the gears 75 and the like to be standardized.

[0049] 10 and 11, the front part of the horizontal arm 71 and the rear part of the horizontal arm 73 are rotatably connected via a resistor 65 that generates a predetermined resistance when rotating. This prevents the horizontal arm 73 from rotating excessively relative to the horizontal arm 71 against the operator's intention, allowing the operator to safely remove stalks stuck in the conveying device 33, etc. The resistor 65 is provided on the outer periphery of the rotating shaft 77A.

[0050] In addition, the lower part of the vertical arm 70 and the rear part of the horizontal arm 71, and the front part of the horizontal arm 71 and the upper part of the vertical arm 74 can be connected by resistors 65 that generate a predetermined resistance when rotating. This prevents the horizontal arm 71 from rotating excessively relative to the vertical arm 70 and the vertical arm 74 from rotating excessively relative to the horizontal arm 73 against the intention of the worker, making it possible to more safely remove the straw stuck in the conveying device 33, etc. The resistors 65 provided between the lower part of the vertical arm 70 and the rear part of the horizontal arm 71 are provided on the outer periphery of the rotating shaft 75A, and the resistors 65 provided between the front of the horizontal arm 71 and the upper part of the vertical arm 74 are provided on the outer periphery of the rotating shaft 79A.

[0051] As shown in Fig. 12, the resistor 65 is formed of a cylindrical receiving cylinder 66 and a pushing cylinder 67. The inner periphery of the receiving cylinder 66 is fitted onto the rotating shaft 75A, etc., and four grooves 66A are formed at predetermined radial positions on the surface of the receiving cylinder 66 facing the pushing cylinder 67, spaced 90 degrees apart in the circumferential direction. The outer periphery of the pushing cylinder 67 is fitted onto the right part of the horizontal arm 71, etc., and a sliding member 67A such as a steel ball and a biasing means 67B such as a spring for biasing the sliding member 67A toward the receiving cylinder 66 are provided at predetermined radial positions on the surface of the pushing cylinder 67 facing the receiving cylinder 66.

[0052] The groove 60A can be formed in a hemispherical or V-shape, and the sliding member 67A can be formed in a spherical or elliptical shape. In addition, two sets of sliding members 67A and biasing means 67B spaced 180 degrees apart at predetermined radial positions, or four sets of sliding members 67A and biasing means 67B spaced 90 degrees apart at predetermined radial positions, can be provided on the opposing surfaces of the pushing cylinder 67.

[0053] When the horizontal arm 71, etc. are rotated around the rotation axis 75A, the sliding member 67A of the pushing cylinder 67 moves circumferentially through a predetermined radial position on the opposing surface of the receiving cylinder 66, and then fits into the groove 66A of the receiving cylinder 66. This restricts the circumferential movement of the sliding member 67A of the pushing cylinder 67, preventing the horizontal arm 71, etc. from rotating against the worker's will, and allowing the removal of the stalks stuck in the conveying device 33, etc. to be performed more safely.

[0054] It is preferable to cover the surface of the receiving cylinder 66 facing the pushing cylinder 67 with an anti-slip material 68 such as cork, rubber, sponge, or resin. This prevents the horizontal arms 71 and 73 from rotating excessively against the operator's intention, making it safer to remove the stalks stuck in the conveying device 33, etc.

[0055] As shown in Fig. 13, the vertical arm 70 with the built-in rotating shaft 75A is disposed to the right of the center in the left-right direction of the lifting device 31B and the lifting device 31C. As a result, when removing culms stuck at the joining position where the left conveying device 33A and the right conveying device 33B approach each other, where the culms raised by the lifting device 31A and the lifting device 31B and the culms raised by the lifting device 31C and the lifting device 31D join, the lifting device 31B and the lifting device 31C can be moved forward and to the right to form a larger working space in front of the conveying device 33, etc., and the culms can be removed more easily.

[0056] Openings through which the fixing pin 95 passes are provided at the front of the transmission cylinder 24, the front of the base of the horizontal arm 71 of the support arm 61, and the front of the tip of the horizontal arm 73. When the support arm 61 is in the stored position, the horizontal arms 71 and 73 of the support arm 61 are fixed to the transmission cylinder 24, so that the horizontal arms 71 and 73 can be prevented from rotating and causing the support arm 61 to assume an open position.

[0057] <Oscillating parts> 14, there is provided a front-rear frame 26 that is formed from a left-right middle portion of the transmission cylinder 22 toward the front side. A pair of left and right substantially rectangular fixing plates 27 are provided facing upward from the front side portion of the front-rear frame 26.

[0058] A swinging part 28 is rotatably supported on the front part of the fixed plate 27. The swinging part 28 is formed of a rectangular rotating plate 28A provided between the pair of left and right fixed plates 27, an extending part 28B extending from the top of the rotating plate 28A toward the rear and upward, and a connecting part 28C extending in the left-right direction from the rear part of the extending part 28B. In addition, a left part of the connecting part 28C is connected to a lower part of the rear surface of the lifting device 31B, and a right part of the connecting part 28C is connected to a lower part of the rear surface of the lifting device 31C.

[0059] A pin 29 is inserted through an opening 27a formed in the front lower part of the fixed plate 27 and an opening 28a formed in the front lower part of the rotating plate 28A, and a fixing means such as a bolt is inserted through a screw portion 27b formed in the rear part of the fixed plate 27 and an opening 28b formed in the rear part of the rotating plate 28A. As a result, as shown in Figures 15 and 16, when moving the upper parts of the lifting device 31B and the lifting device 31C forward, the fixing means is removed and the swinging part 28 is rotated counterclockwise about the pin 29, so that the upper parts of the lifting device 31B and the lifting device 31C can be pulled forward to increase the working space in front of the conveying device 33.

[0060] The pin 29 may be a straight pin, a stepped pin, an L-shaped pin with a bent portion formed on one side of the straight pin, or the like. When a straight pin is used, it is preferable to form through holes at both ends of the straight pin and insert a snap pin or a split pin therethrough. When a stepped pin is used, it is preferable to form a counterbore on the side of the fixed plate 27 into which the stepped portion of the stepped pin enters, and to form a through hole on the other side where the stepped portion of the stepped pin is not formed, and to insert a snap pin or a split pin therethrough. When an L-shaped pin is used, it is preferable to provide an engagement portion (not shown) on the side of the fixed plate 27 with which the bent portion of the L-shaped pin engages, and to form a through hole on the other side where the bent portion of the L-shaped pin is not formed, and to insert a snap pin or a split pin therethrough. This makes it possible to prevent the pin 29 from falling off the openings of the fixed plate 27 and the rotating plate 28A.

[0061] 17(a) and (b), protrusions 29a protruding in the radial direction can be formed at both ends of the pin 29. When using this pin 29, a groove 28c extending in the radial direction into which the protrusion 29a is inserted is formed in the opening 28a of the rotating plate 28A as shown in Figs. 17(c) and (d), and a groove 27c extending in the radial direction into which the protrusion 29a is inserted is formed in the opening 27a of the fixed plate 27 as shown in Figs. 17(e) and (f). This makes it possible to easily fix the pin 29 by rotating the pin 29 around the axis after the pin 29 is inserted through the opening 27a of the fixed plate 27 and the opening 28a of the rotating plate 28A.

[0062] <First form connection parts> 18 to 20 show a first form of connecting part 93. A rib (a "first rib" in the claims) 71A is provided on the upper part of the horizontal arm 71, extending from the front side of the vertical arm 70 to the front side of the vertical arm 72, and a rib (a "second rib" in the claims) 73A is provided on the upper part of the horizontal arm 73, extending from the front side of the vertical arm 72 to the front side of the vertical arm 74.

[0063] In the first embodiment, a recess 93A is formed in the lower part of the connecting part 93, and an opening 93B is formed in the upper part. The upper part of the connecting part 93 is rotatably supported via a pin 94 extending in the left-right direction in front of the rib 71A. As a result, as shown in Fig. 27, when the lifting device 31B and the lifting device 31C are moved forward, the recess 93A of the connecting part 93 engages with the rib 73A to restrict the horizontal arm 73 from rotating around the vertical arm 72, preventing contact between the worker and the horizontal arm 73, and allowing the stalk stuck in the conveying device 33, etc. to be safely removed.

[0064] A straight pin, a stepped pin, or the like can be used as the pin 94. When a straight pin is used, it is preferable to form openings at both ends of the straight pin and insert a snap pin or a split pin therethrough. When a stepped pin is used, it is preferable to form an opening on the other side of the stepped pin where the step is not formed and insert a snap pin or a split pin therethrough. This can prevent the pin 94 from falling off the front part of the rib 71A. Also, a fastening means such as a bolt can be used instead of the pin. Also, a fastening part such as a bolt can be used instead of the pin 94.

[0065] Furthermore, although the connecting part 93 is formed as an integral part, it may also be formed by dividing it into a left connecting part and a right connecting part, which are then connected together by a fastening part such as a bolt.

[0066] 21 to 23 show a second embodiment of a connecting part 93. The same members as those in the first embodiment of the connecting part 93 are given the same reference numerals and the description thereof will be omitted.

[0067] The second form of connecting part 93 is formed of a left connecting part 93L and a right connecting part 93R. A concave-convex hook part 93C is formed at the bottom of each of the left connecting part 93L and the right connecting part 93R, and an opening 93B is formed at the top of each of them.

[0068] The upper parts of the left connecting part 93L and the right connecting part 93R are rotatably supported by the front part of the rib 71A via a pin 94 extending in the left-right direction, and the rear part of the rib 73A is provided with a pin 73B extending in the left-right direction to engage with the hook parts 93C of the left connecting part 93L and the right connecting part 93R. As a result, as shown in FIG. 27, when the lifting device 31B and the lifting device 31C are moved forward, the hook parts 93C of the left connecting part 93L and the right connecting part 93R are engaged with the pin 73B to restrict the horizontal arm 73 from rotating around the vertical arm 72, preventing contact between the worker and the horizontal arm 73 and allowing the stalk stuck in the conveying device 33 to be safely removed. In addition, the engagement between the hook parts 93C of the left connecting part 93L and the right connecting part 93R and the pin 73B can be prevented from being released due to vibration or the like.

[0069] <Removing grain stalks stuck in the conveyor> When the stalks are stuck in the transport device 33 located behind the lifting device 31B and the lifting device 31C, after stopping the engine E, the lifting device 31B and the lifting device 31C are manually moved forward to an open position as shown in Figs. 24 to 26. This creates a large working space in front of the transport device 33, etc., making it easier to remove the stalks. In addition, as shown in Fig. 16, it is preferable to rotate the swinging part 28 to pull out the upper parts of the lifting device 31B and the lifting device 31C forward. This creates a large working space in front of the transport device 33, etc., making it easier to remove the stalks.

[0070] As shown in FIG. 27, when the lifting device 31B and the lifting device 31C are manually moved forward, the horizontal arm 71 rotates 90 degrees clockwise around the vertical arm 70 as viewed from the axis of the vertical arm 70, and the horizontal arm 73 rotates 90 degrees counterclockwise around the vertical arm 72 as viewed from the axis of the vertical arm 72, so that the longitudinal direction of the horizontal arm 71 and the longitudinal direction of the horizontal arm 73 extend along the front-rear direction. This prevents the lugs for transporting the culms of the lifting device 31B and the lifting device 31C from moving up and down, and when the lifting device 31B and the lifting device 31C are moved backward to the storage position, the position of the lugs can also be moved to the position before the movement. In addition, after removing the clogged culms, the lifting device 31B and the lifting device 31C can be quickly re-driven by putting them into the storage position. In addition, as shown in FIG. 18, etc., it is preferable to engage the recess 93A of the connecting part 93 with the rib 73A of the horizontal arm 73. This restricts the rotation of the horizontal arm 73, preventing the horizontal arm 73 from coming into contact with the worker, making it possible to more safely remove grain straw that has become stuck in the conveying device 33, etc.

[0071] When the transport device 33 located to the rear right of the lifting device 31B and the lifting device 31C is clogged with stalks, after stopping the engine E, the lifting device 31B and the lifting device 31C are manually moved forward and leftward to an open position as shown in Figures 28 to 30. By moving the lifting device 31B and the lifting device 31C forward and leftward, a large working space is formed in front of the transport device 33, and the stalks can be easily removed.

[0072] As shown in FIG. 31, when the lifting device 31B and the lifting device 31C are manually moved forward to the left, the horizontal arm 71 rotates 60 degrees clockwise around the vertical arm 70 as viewed from the axis of the vertical arm 70, and the horizontal arm 73 rotates 120 degrees counterclockwise around the vertical arm 72 as viewed from the axis of the vertical arm 72, so that the longitudinal direction of the horizontal arm 71 and the longitudinal direction of the horizontal arm 73 extend along a virtual line L1 that intersects with the front-rear direction at an intersecting angle of 30 degrees. This makes it possible to prevent the lugs that transport the stalks of the lifting device 31B and the lifting device 31C from moving up and down, and when the lifting device 31B and the lifting device 31C are moved backward to the storage position, the position of the lugs can also be moved to the position before the movement. In addition, after removing the clogged stalks, the lifting device 31B and the lifting device 31C can be quickly re-driven by putting them into the storage position. 18, it is preferable to engage the recess 93A of the connecting part 93 with the rib 73A of the horizontal arm 73. This restricts the rotation of the horizontal arm 73 and prevents the horizontal arm 73 from contacting the worker, making it possible to more safely remove the stalks stuck in the conveying device 33, etc.

[0073] When the transport device 33 located on the rear left side of the lifting device 31B and the lifting device 31C is clogged with stalks, after stopping the engine E, the lifting device 31B and the lifting device 31C are manually moved forward and to the right to open the device as shown in Figs. 32 to 34. By moving the lifting device 31B and the lifting device 31C forward and to the right, a large working space is formed in front of the transport device 33, and the stalks can be easily removed.

[0074] As shown in FIG. 35, when the lifting device 31B and the lifting device 31C are manually moved forward to the right, the horizontal arm 71 rotates 120 degrees clockwise around the vertical arm 70 as viewed from the axis of the vertical arm 70, and the horizontal arm 73 rotates 60 degrees counterclockwise around the vertical arm 72 as viewed from the axis of the vertical arm 72, so that the longitudinal direction of the horizontal arm 71 and the longitudinal direction of the horizontal arm 73 extend along a virtual line L2 that intersects with the front-rear direction at an intersection angle of 30 degrees. This makes it possible to prevent the lugs that transport the stalks of the lifting device 31B and the lifting device 31C from moving up and down, and when the lifting device 31B and the lifting device 31C are moved backward to the storage position, the position of the lugs can also be moved to the position before the movement. In addition, after removing the clogged stalks, the lifting device 31B and the lifting device 31C can be quickly re-driven by putting them into the storage position. 18, it is preferable to engage the recess 93A of the connecting part 93 with the rib 73A of the horizontal arm 73. This restricts the rotation of the horizontal arm 73 and prevents the horizontal arm 73 from contacting the worker, making it possible to more safely remove the stalks stuck in the conveying device 33, etc.

[0075] <Left stock transport device> As shown in Figures 36 and 37, the left stock base conveying device 34A is equipped with a sprocket 100 around which the left stock base conveying chain 34a is wound, a star wheel 101 that rakes in the base of the culm to which the output rotation of the sprocket 100 is transmitted, and a pulley 102 around which a lugged belt is wound.

[0076] Moreover, the rear part of a front frame 104 extending forward and the front part of a rear frame 105 extending rearward are fixed to a cylindrical body 103, which houses a rotating shaft that connects the sprocket 100 and the star wheel 101. This allows the cylindrical body 103 to be firmly supported on the machine frame 1 via the front frame 104 and the rear frame 105. The front part of the front frame 104 is fixed to a frame (not shown) that stands on the machine frame 1, and the rear part of the rear frame 105 is fixed to the left part of the transmission tube 22. Moreover, a protective cover 106 is provided on the upper side of the pulley 102.

[0077] <Tension adjustment mechanism> As shown in Figures 38 and 39, the lugged chain 110 that lifts the stalks is wound around a sprocket (the "first sprocket" in the claims) 111 provided on the upper part of the lifting device 31B, a tension sprocket 112 provided to the right of the sprocket 111, and a sprocket (the "second sprocket" in the claims) 113 provided on the lower part of the lifting device 31B.

[0078] The sprocket 111 is supported by a rotating shaft 111A, the front part of which is rotatably supported by a front cover 116 of the lifting device 31B, and the rear part of which is rotatably supported by a rear cover 117 of the lifting device 31B via a support member 114. The output rotation of a rotating shaft 87 mounted within the vertical arm 74 is transmitted to the rotating shaft 111A via gears 88 and the like.

[0079] The tension sprocket 112 is supported on the front part of a rotating shaft 112A, and the rear part of the rotating shaft 112A is rotatably supported on the right part of a tension arm 115 that is rotatably supported on a support member 114. In addition, the sprocket 113 is supported by a rotating shaft 113A, and the front part of the rotating shaft 113A is rotatably supported on a front cover 116 of the raising device 31B, and the rear part of the rotating shaft 113A is rotatably supported on a rear cover 117 of the raising device 31B.

[0080] As a result, when viewed from the axis of the rotating shaft 111A, the chain 110 can be rotated counterclockwise, the fallen culms can be lifted by the lifting device 31A and the lifting device 31B, and the base of the culms can be efficiently cut by the left cutting blade device 32A.

[0081] The lugged chain 210 that raises the stalks is wound around a sprocket (the "first sprocket" in the claims) 211 provided on the upper part of the raising device 31C, a tension sprocket 212 provided to the left of the sprocket 211, and a sprocket (the "second sprocket" in the claims) 213 provided on the lower part of the raising device 31B.

[0082] The sprocket 211 is supported by a rotating shaft 211A, the front part of which is rotatably supported by a front cover 216 of the raising device 31C, and the rear part of which is rotatably supported by a rear cover 217 of the raising device 31C via a support member 214. The output rotation of a rotating shaft 87 mounted within the vertical arm 74 is transmitted to the rotating shaft 211A via a gear 89, etc.

[0083] The tension sprocket 212 is supported on the front part of a rotating shaft 212A, and the rear part of the rotating shaft 212A is rotatably supported on the right part of a tension arm 215 that is rotatably supported on the support member 114. In addition, the sprocket 213 is supported by a rotating shaft 213A, and the front part of the rotating shaft 213A is rotatably supported on a front cover 216 of the raising device 31C, and the rear part of the rotating shaft 213A is rotatably supported on a rear cover 217 of the raising device 31C.

[0084] As a result, when viewed from the axis of the rotating shaft 211A, the chain 210 can be rotated clockwise, the fallen culms can be lifted by the lifting devices 31C and 31D, and the base of the culms can be efficiently cut by the right cutting blade device 32B.

[0085] 40 to 42, the lower part of a rectangular vertical member 120 extending in the vertical direction is attached to the outer periphery of the left opening of the vertical arm 74, and the lower part of a rectangular vertical member 220 extending in the vertical direction is attached to the outer periphery of the right opening of the vertical arm 74. In addition, the upper parts of the vertical members 120 and 220 are connected by a rectangular horizontal member 121 extending in the left-right direction.

[0086] A tension rod 122 extending in the vertical direction is provided at a portion of the horizontal member 121 facing the left portion of the tension arm 115, and the lower portion of the tension rod 122 and the left portion of the tension arm 115 are connected via a biasing part 123 such as a spring. The tension rod 122 is provided with an adjustment means 124, such as a bolt, for adjusting the length of the rod that extends below the cross member 121. This makes it possible to adjust the tension that urges the left part of the tension arm 115 upward via the urging part 123, thereby preventing the chain 110 wound around the sprocket 111, etc. from falling off.

[0087] A tension rod 222 extending in the vertical direction is provided at a portion of the cross member 121 facing the right portion of the tension arm 215, and the lower portion of the tension rod 222 and the right portion of the tension arm 215 are connected via a biasing part 223 such as a spring. The tension rod 222 is also provided with an adjustment means 224 such as a bolt for adjusting the length of the rod that extends below the cross member 121. This makes it possible to adjust the tension that biases the right portion of the tension arm 215 upward via the biasing part 223, thereby preventing the chain 210 wound around the sprocket 211 or the like from falling off.

[0088] In the form shown in Figure 40 etc., the upper parts of vertical member 120 and vertical member 220 are connected by horizontal member 121, but it is also possible to provide a left plate extending toward the right side at the upper part of vertical member 120, a right plate extending toward the left side at the upper part of vertical member 220, a tension rod 122 at the right part of the left plate, and a tension rod 222 at the left part of the right plate. [Explanation of symbols]

[0089] 1 Aircraft frame 3 Reaping device 4. Threshing Equipment 24 Transmission tube 26 Front and rear frames 27 Fixing plate 28 Swinging parts 28A Rotating Plate 29 pin 31A Lifting device 31B Lifting device (intermediate lifting device) 31C Lifting device (intermediate lifting device) 31D lifting device 32 Cutting blade device 33 Transport equipment 61 Support arm 65 Resistor 66 Receiver body 66A Groove 67 Press cylinder 67A Sliding member 67B Biasing means 68 Anti-slip material 70 Vertical arm (first vertical arm) 71 Horizontal arm (first horizontal arm) 71A Rib (First Rib) 72 Vertical arm (second vertical arm) 73 Horizontal arm (second horizontal arm) 73A Rib (2nd Rib) 74 Vertical arm (third vertical arm) 75 Gear (1st Gear) 75A Rotating shaft (first rotating shaft) 76 Counter gear (first counter gear) 76A Countershaft (1st countershaft) 77A Rotating shaft (second rotating shaft) 77U Gear (2nd Gear) 77D Gear (3rd Gear) 78 Counter gear (second counter gear) 78A Countershaft (Second countershaft) 79 Gear (4th Gear) 79A Rotating shaft (third rotating shaft) 93 Connecting parts 93A Recess 94 pin 95 Fixing pin 110 Chen 111 sprocket (first sprocket) 112 Tension sprocket 112A Rotating shaft 113 Sprocket (Second sprocket) 114 Support member 115 Tension Arm 120 Vertical Member 121 Horizontal member 122 Tension rod 123 Power supply parts 210 Chen 211 Sprocket (1st sprocket) 212 Tension sprocket 212A Rotating shaft 213 Sprocket (2nd sprocket) 214 Support member 215 Tension Arm 220 Vertical Members 222 Tension Rod 223 Actuating parts E-Engine

Claims

[Claim 1] A combine harvester having a harvesting device (3) provided at the front of a machine frame (1) on which an engine (E) is mounted, and a threshing device (4) provided at the rear left side of the harvesting device (3), The reaping device (3) is formed of four or more lifting devices (31A, 31B, 31C, 31D) arranged in the left-right direction to lift up the culms in the field, a cutting blade device (32) to cut the base of the culms, and a conveying device (33) to convey the reaped culms toward the threshing device (4), A transmission cylinder (24) is provided above the lifting device (31A, 31B, 31C, 31D) and extends in the left-right direction; Among the lifting devices (31A, 31B, 31C, 31D), two intermediate lifting devices (31B, 31C) located in the middle in the left-right direction are supported by a support arm (61) in a state in which they can move relative to the transmission cylinder (24), The intermediate lifting device (31B, 31C) includes a vertical member (120, 220) connected to the support arm (61) and extending vertically from each of the intermediate lifting devices (31B, 31C), and a horizontal member (121) connecting the vertical members (120, 220), The intermediate raising device (31B, 31C) has a chain (110, 210) having a lug for raising the stalk, A tension rod (122, 222) for applying tension to the chain (110, 210) is connected to the cross member (121). A combine harvester characterized by the above.

Images