combine

Abstract

To provide a combine harvester capable of performing excellent threshing by early and properly detecting clogging of grain culms in a threshing chamber by solving the problems that as threshing control of a combine harvester, an angle of a dust feed plate is controlled so that a detection value of a sensor which detects feed reaction force of grain culms, acting on the dust feed plate becomes a prescribed value, however, it is difficult to properly detect clogging of grain culms and to perform excellent threshing control due to that the sensor does not detect the occurrence of clogging when an amount of grain culms during direct threshing treatment becomes large, and the sensor is arranged in a part where a thresh moves from upward to downward.SOLUTION: A clogging sensor 70 which detects the clogging of crops is provided in an upper position of a part where a thresh 52 moves from downward to upward in a front half part where a threshing cylinder 53 having the thresh 52 is driven and rotated in a threshing chamber 51 of a thresher 5, and crops are subjected to threshing treatment while moving from an inlet side to an outlet side of the threshing chamber 51.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a combine harvester. [Background technology]

[0002] Conventionally, to control threshing in a combine harvester, the angle of the dust plate (dust guide) was configured to be freely changed, and a sensor was provided to detect the reaction force of the stalks acting on the dust plate, and the angle of the dust plate was controlled so that the detection value of the reaction force of the stalks acting on the dust plate detected by the sensor became a predetermined value (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-055808 A Summary of the Invention [Problem to be solved by the invention]

[0004] The sensor detects the reaction force of the stalks acting on the dust-sending plate, and does not directly detect the occurrence of clogging due to an increase in the amount of stalks during threshing. Moreover, since the sensor is located at the part where the threshing teeth move from top to bottom, it is difficult to properly detect clogging of the stalks, and it is difficult to perform good threshing control. In addition, there is also a problem that the reaction force cannot be detected when the dust-sending plate is parallel to the rotation direction of the threshing teeth.

[0005] The present invention has been made in consideration of the above, and an object of the present invention is to provide a combine harvester that can detect clogging of straw in the threshing chamber early and properly, thereby enabling good threshing. [Means for solving the problem]

[0006] The first aspect of the present invention is In a combine harvester provided with a threshing device (5) for threshing the harvested crops reaped by a reaping section (4) provided at the front of a machine body moving forward by a traveling device (2), a threshing drum (53) having threshing teeth (52) is driven to rotate in a threshing chamber (51) of the threshing device (5), and a jamming sensor (70) for detecting jamming of the harvested crops is provided above a portion where the threshing teeth (52) move from bottom to top in the first half of the threshing process in which the harvested crops move from the entrance side of the threshing chamber (51) to the exit side of the threshing chamber (51), This combine harvester is characterized in that the forward speed of the machine body is gradually reduced by a predetermined amount each time the detection of a clogging by the clogging sensor (70) continues for a predetermined period of time or more. The second aspect of the present invention is In a combine harvester provided with a threshing device (5) for threshing the harvested crops reaped by a reaping section (4) provided at the front of a machine body moving forward by a traveling device (2), a threshing drum (53) having threshing teeth (52) is driven to rotate in a threshing chamber (51) of the threshing device (5), and a jamming sensor (70) for detecting jamming of the harvested crops is provided above a portion where the threshing teeth (52) move from bottom to top in the first half of the threshing process in which the harvested crops move from the entrance side of the threshing chamber (51) to the exit side of the threshing chamber (51), This combine is characterized in that, if the detection of clogging by the clogging sensor (70) continues for a predetermined period of time or longer, the prime mover is stopped. The first invention related to the present invention is a combine harvester equipped with a threshing device 5 which threshes the harvested material harvested by a cutting section 4 provided at the front of the body which moves forward on a traveling device 2, in which a threshing drum 53 having threshing teeth 52 is driven to rotate within a handling chamber 51 of the threshing device 5, and the harvested material is threshed as it moves from the entrance side of the handling chamber 51 to the exit side thereof, in the first half of the combine harvester in which a jam sensor 70 is provided above the part where the threshing teeth 52 move from bottom to top.

[0007] The first invention related to the present invention According to the method, a threshing drum 53 having threshing teeth 52 is driven to rotate within a threshing chamber 51 of the threshing device 5, and in the first half of the threshing process, where the harvest moves from the entrance side of the threshing chamber 51 to the exit side, a pressure-sensitive jamming sensor 70 is provided above the part where the threshing teeth 52 move from bottom to top, so that jamming of the harvest can be detected at an early stage in the first half of the threshing chamber 51, and furthermore, the upper part where the threshing teeth 52 move from bottom to top is the part where the harvest is lifted up and accumulates, so that jamming can be detected appropriately.

[0008] Second Invention Related to the Present Invention When the clogging sensor 70 detects clogging, the notification means 6g and 6h are activated. The first invention related to the present invention It is a combine harvester.

[0009] According to the second invention related to the present invention, In addition to the above-mentioned advantageous effect, the notification means 6g, 6h are actuated when the clogging sensor 70 detects a clogging, so that the pilot can immediately take action to clear the clogging, such as slowing down the forward speed of the aircraft.

[0010] The third invention related to the present invention If the clogging sensor 70 continues to detect a clogging for a predetermined period of time or more, the forward speed of the machine is reduced by a predetermined amount. The first or second invention related to the present invention It is a combine harvester.

[0011] According to the third aspect of the present invention, the first or second aspect of the present inventionIn addition to the above-mentioned effect, if the clogging sensor 70 continues to detect a clogging for a predetermined period of time or longer, the forward speed of the machine body is reduced by a predetermined amount, so that the clogging is automatically cleared.

[0012] The fourth invention related to the present invention Each time the clogging sensor 70 continues to detect a clogging for a predetermined period of time or more, the forward speed of the machine is gradually reduced by a predetermined amount. Any one of the first to third inventions related to the present invention It is a combine harvester.

[0013] Fifth Invention Related to the Present Invention If the clogging sensor 70 continues to detect clogging for a predetermined period of time or more, the engine is stopped. Any of the first to fourth inventions related to the present invention It is a combine harvester.

[0014] According to the fifth aspect of the present invention, any one of the first to fourth aspects of the present invention In addition to the above-mentioned advantageous effects, if the clogging sensor 70 continues to detect a clogging for a predetermined period of time or more, the prime mover is stopped, thereby preventing clogging and preventing the handling drum 53 from becoming unable to rotate and being broken, or damage to the transmission part. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a side view of a combine harvester according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a side cross-sectional view of the threshing device of the combine. [Diagram 3] FIG. [Figure 4] FIG. 2 is a front cross-sectional view of a threshing apparatus showing another embodiment of the present invention. [Diagram 5] FIG. 2 is a front cross-sectional view of a threshing apparatus showing another embodiment of the present invention. [Figure 6] 1A-1C are side views of a treating tooth support member 54 showing different treating tooth patterns in an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] An example in which the present invention is applied to a general-purpose combine harvester of the whole culm input type will be described with reference to Figs. 1 to 6.

[0017] <Overall configuration of combine harvester> A general-purpose combine harvester is used to harvest rice, wheat, etc., and comprises a machine frame 1, a pair of left and right crawler-type traveling devices 2 that support the machine body, an elevator 3 supported on the front of the machine frame 1 so as to be able to swing up and down, a reaping unit 4 connected to the front end of the elevator 3, a threshing device 5 disposed on the left side of the machine frame 1, a grain tank disposed on the right side of the threshing device 5, and a driving unit 6 disposed to the right of the elevator 3 and the threshing device 5 and in front of the grain tank. The traveling devices 2, elevator 3, reaping unit 4, threshing device 5, grain transport device of the grain tank, etc. are driven by a prime mover (engine) mounted on the machine frame 1.

[0018] The driver's section 6 is provided with a pilot's seat 6a, a motor start switch 6b, an HST lever 6c which switches the drive to the traveling device 2 between forward and backward travel and operates a hydrostatic continuously variable transmission which changes the speed continuously, a steering lever 6d which switches the left and right drive of the left and right traveling devices 2 on and off to steer the machine and also manually move the reaping unit 4 up and down, a reaping / threshing clutch lever 6e, a control device 6f which controls each component part, a monitor 6g, an alarm buzzer 6h, etc.

[0019] <Reaping part 4> The harvesting section 4 comprises a pair of left and right grass dividing rods 7, a platform 8, a rotating reel 9 for raking in the harvested material, a clipper-type cutting device 10 disposed across the left and right grass dividing rods 7 at the front end of the platform 8, and an auger 11 disposed on the platform 8 and rotating around an axis facing in the left-right direction.

[0020] A hydraulic cylinder is provided between the machine frame 1 and the elevator 3, and the elevator 3 is provided so as to be able to swing up and down around a left-right axis relative to the threshing device 5. When the elevator 3 is operated to swing up and down, the reaping unit 4 goes into a working state where the platform 8 is lowered close to the ground, and a non-working state where the platform 8 is raised high above the ground.

[0021] The rotating reel 9 is rotatably supported by a reel arm 12 which is supported so as to be able to swing up and down around a swing axis P relative to the cutting part 4, is supported so as to always face downward by a rotating body 13 supported by the reel arm 12, and is provided with a plurality of tines 14 which rake in the planted stalks.

[0022] When the combine is driven forward in the working state with the reaping part 4 lowered, the planted culms are separated by the separating rod 7 into culms to be harvested and non-cultivated culms, and the planted culms to be harvested are raked onto the platform 8 by the rotational drive of the rotating reel 9, while being harvested by a clipper-type cutting device 10. The harvested culms raked onto the platform 8 are sent laterally by the auger 11 to the front of the elevator 3, and are then raked further into the elevator 3. The harvested culms are transported rearward by the elevator 3, and the entire harvested culms from the base to the tip are fed into the threshing device 5.

[0023] <Ogre> The auger 11 has left and right spirals on the right and left sides of the front of the elevator 3, and transports the harvested straw laterally to the front of the elevator 3, where it is raked into the front of the elevator 3 by a raking rod.

[0024] <Elevator> The elevator 3 comprises a rectangular cylindrical elevator case body 30 having front and rear openings, and a conveyor installed within the elevator case body 30 for transporting the harvested stalks to the threshing device 5 at the rear.

[0025] <Threshing device> The threshing device 5 has a threshing drum 53 having threshing teeth 52 mounted on a cylindrical threshing chamber 51 formed at the top by a threshing drum cover 50, and the threshing drum 53 is axially mounted facing in the fore-and-aft direction of the machine body.

[0026] The threshing drum 53 has a threshing tooth support member 54, which has a plurality of threshing teeth 52, arranged at a predetermined interval in the radial direction (radial direction) from the threshing drum shaft 55, and the threshing tooth support members 54 are arranged at a predetermined interval from each other in the circumferential direction (rotational direction).A polygonal drum portion 56 is provided inside the threshing tooth support member 54, and the drum portion 56 and the threshing tooth support member 54 are arranged so that the apex (corner) of the drum portion 56 faces between the threshing tooth support members 54 in the circumferential direction of the threshing drum shaft 55.

[0027] The threshing drum 53 has a conical tapered section 57 at the tip of the drum section 56, with the diameter increasing towards the rear, and a spiral 58 at the rear for transporting the harvested stalks.

[0028] The lower part of the handling chamber 51 formed by the handling drum cover 50 is provided with a general winnower 59a, a swinging sorting shelf 59b, a transfer shelf section 59c, a sieve 59d, a straw rack 59e, a first conveyor 59f, and a second conveyor 59g.

[0029] In addition, a spreader-type cutting and processing device 60 is provided at the rear of the threshing device 5 to cut straw dust and other materials discharged from the threshing device 5. The cutting and processing device 60 is configured with a rotating blade (chopper) 61 for cutting the discharged stalks, and a cutting blade 62 that can be raised and lowered at the bottom of the front part of the cutting and processing device 60.

[0030] Therefore, when the reaped stalks are supplied to the threshing device 5 from the elevator 3, the threshing drum 53 rotates in the threshing chamber 51 of the threshing device 5 in the direction of arrow A to thresh the reaped stalks. As the threshing drum 53 rotates in the direction of arrow A, the reaped stalks are threshed while being transported to the exit 50d of the threshing chamber 51, and the threshed grains fall from the receiving net 50b onto the oscillating sorting shelf 59b, where they are sorted by the oscillation of the oscillating sorting shelf 59b and the air blown from the winnower 59a. The grains that fall from the oscillating sorting shelf 59b are collected by the first conveyor 59f and sent to the grain tank. The straw is sent to the cutting processing device 60 from the exit 50d, where it is shredded and discharged outside the machine.

[0031] The threshed grains are sent to a grain tank where they are temporarily stored, and are discharged from the grain tank by a discharge auger 15 as needed.

[0032] The threshing drum cover 50 is composed of a receiving net 50b formed in a mesh-like shape through which grains and the like fixed to the frame 50a of the threshing device 5 fall downward, and an upper threshing drum cover 50c formed of an upward-opening plate body whose inner side in the left-right direction of the body is pivotally supported relative to the receiving net 50b and whose outer side is locked in a closed state by a locking device.

[0033] <Thresher jam prevention control> A pressure-sensitive jamming sensor 70 is provided on the entrance side of the handling chamber 51 (the front half of the handling chamber 51) to detect when stalks are retained and clogging occurs above the part where the handling teeth 52 move from bottom to top as the threshing drum 53 rotates in the direction of the arrow A. The jamming sensor 70 is provided on the upper threshing drum cover 50c.

[0034] When the jam sensor 70 detects a jam for one or more consecutive seconds, the control device 6f sounds the alarm buzzer 6h as a notification means of the driving unit 6 and / or turns on the warning lamp of the monitor 6g to notify the operator of the occurrence of a jam. Note that the notification means may be any other means such as a voice alarm.

[0035] If the operator notices this notification, he or she immediately operates the HST lever 6c to slow down the vehicle's traveling speed, and maintains the decelerated state until the straw accumulation in the handling chamber 51 is cleared and the machine returns to normal, and the blockage detection by the blockage sensor 70 is cleared. Once the blockage detection by the blockage sensor 70 is cleared, the operator operates the HST lever 6c to return the machine to its original traveling speed and continue harvesting work.

[0036] If the pilot does not notice the notification and the clogging sensor 70 detects a clogging for two or more consecutive seconds, the control device 6f automatically operates the HST lever 6c with an actuator to decelerate the aircraft's traveling speed by a predetermined speed (for example, 10% deceleration).

[0037] If the clog sensor 70 detects a clog for four or more consecutive seconds despite the deceleration to the above-mentioned specified speed, the control device 6f automatically operates the HST lever 6c with an actuator to decelerate the vehicle's traveling speed further to a specified speed (e.g., 20% deceleration).

[0038] If the clogging sensor 70 detects clogging for five or more consecutive seconds despite the further deceleration to the above-mentioned predetermined speed, the control device 6f turns off the prime mover start switch 6b to stop the prime mover (engine).

[0039] After the prime mover is stopped, the control device 6f turns off the reaping / threshing clutch lever 6e and does not start the prime mover even if the prime mover start switch 6b is turned on unless the HST lever 6c is neutralized. The reaping / threshing clutch lever 6e and the HST lever 6c are each provided with a position sensor, which outputs their respective operating positions to the control device 6f.

[0040] Therefore, unless the reaping / threshing clutch lever 6e is turned off and the HST lever 6c is put in neutral, the prime mover will not restart even if the prime mover start switch 6b is turned on, thereby maintaining safety and preventing damage or breakage due to sudden operation.

[0041] In addition, when the HST lever 6c is operated by an actuator to automatically decelerate the traveling speed of the vehicle to a predetermined speed, or when the HST lever 6c is operated by an actuator to automatically decelerate the traveling speed of the vehicle to a further predetermined speed, if the clog sensor 70 does not detect a clog for two seconds or more after the clog detection is cleared, the control device 6f automatically operates the HST lever 6c by an actuator to return the vehicle to the speed before deceleration.

[0042] In summary, a pressure-sensitive jam sensor 70 is provided at the entrance side of the handling chamber 51 (the first half of the handling chamber 51) above the part where the handling drum 53 rotates in the direction of arrow I and the handling teeth 52 move from bottom to top, which detects when the stalks have become stuck and are causing a jam.Therefore, it is possible to detect when the stalks have become stuck and are causing a jam at an early stage at the entrance side of the handling chamber 51 (the first half of the handling chamber 51), and furthermore, the upper part where the handling teeth 52 move from bottom to top is the area where the stalks are lifted up and accumulate, so the pressure is high and it can be detected appropriately.

[0043] In addition, the dead space above the portion where the handling teeth 52 move from bottom to top can be used to dispose the clogging sensor 70, thereby simplifying the configuration.

[0044] When the jam sensor 70 detects a jam, the control device 6f sounds the alarm buzzer 6h of the driving unit 6 and / or turns on the warning lamp on the monitor 6g to notify the operator of the occurrence of a threshing jam, so that the operator can immediately take action to clear the jam, such as operating the HST lever 6c to slow down the machine's forward speed.

[0045] Even if the pilot neglects to operate the HST lever 6c to clear the blockage, such as slowing down the aircraft's traveling speed, if the blockage detection by the blockage sensor 70 continues for a predetermined time or longer, the control device 6f will automatically decelerate the HST lever 6c using an actuator to gradually slow down the aircraft's traveling speed to a predetermined speed, thereby automatically clearing the blockage.

[0046] Furthermore, if the clogging detection by the clogging sensor 70 continues for a predetermined period of time or more even after automatic deceleration, the control device 6f turns off the prime mover start switch 6b to stop the prime mover (engine), thereby preventing clogging and preventing the handling drum 53 from becoming unable to rotate and being damaged or the transmission part from being damaged.

[0047] <Teeth Treatment> The stalks are threshed as they move from the entrance to the exit of the threshing chamber 51, and from the middle position onwards, there are almost no husks attached to them. However, in the past, the threshing teeth 52 were set at the same pitch from the entrance to the exit of the threshing chamber 51, so horsepower was wasted threshing straw without husks, and when threshing high-yielding stalks, there was insufficient horsepower, making it impossible to perform proper threshing.

[0048] Therefore, for the threshing tooth support member 54 having threshing teeth 52 attached to the threshing drum 53, multiple patterns of threshing tooth support members 54 with different arrangements of the threshing teeth 52 are prepared, and by combining threshing tooth support members 54 with different threshing tooth patterns, it is possible to improve threshing accuracy and reduce horsepower waste.

[0049] That is, six patterns of the treating tooth support members 54 shown in Figs. 6(A) to 6(F) are prepared.

[0050] 1A shows a tooth support member 54 on which teeth 52 are provided at a wide pitch.

[0051] 1B, the teeth 52 are provided at a narrow pitch on a teeth support member 54.

[0052] In FIG. 1C, the teeth 52 are provided on a teeth support member 54 at a narrow pitch on the inlet side and at a wide pitch on the outlet side.

[0053] In (D), the teeth 52 are provided on the teeth support member 54 at a narrow pitch on the inlet and outlet sides and at a wide pitch in the middle position.

[0054] In (E), the teeth 52 are provided on the teeth support member 54 at a wide pitch on the inlet and outlet sides and at a narrow pitch in the middle position.

[0055] In (F), the teeth 52 are provided on the teeth support member 54 at a wide pitch on the inlet side and at a narrow pitch on the outlet side. Combination example 1 of the tooth support member 54 Six handling tooth support members 54 are provided at equal intervals around the circumferential direction of the handling drum 53, and three handling tooth support members 54 (C) in which the handling teeth 52 are arranged at a narrow pitch on the inlet side and a wide pitch on the outlet side and three handling tooth support members 54 (B) in which the handling teeth 52 are arranged at a narrow pitch are alternately arranged or attached at an appropriate position.

[0056] Therefore, the narrow-pitch threshing teeth 52 at the entrance side of the threshing chamber 51 efficiently thresh the stalks, and the wider-pitch threshing teeth 52 at the exit side from the central position where threshing is almost complete reduce the load, improving threshing accuracy and reducing horsepower waste, resulting in good threshing performance. Combination example 2 of the tooth support member 54 Six handling tooth support members 54 are provided at equal intervals around the circumferential direction of the handling drum 53. Six handling tooth support members 54 are attached, in which the handling teeth 52 of (D) are arranged at a narrow pitch on the inlet and outlet sides and at a wide pitch in the middle position. Combination example 3 of the tooth support member 54 Six handling tooth support members 54 are provided at equal intervals around the threshing drum 53, and six handling tooth support members 54 are attached in which the handling teeth 52 of (C) are arranged at a narrow pitch on the inlet side and a wide pitch on the outlet side. Example 4 of combination of the tooth support member 54 Six handling tooth support members 54 are provided at equal intervals around the circumferential direction of the handling drum 53, and three handling tooth support members 54 (C) in which the handling teeth 52 are arranged at a narrow pitch on the inlet side and a wide pitch on the outlet side and three handling tooth support members 54 (A) in which the handling teeth 52 are arranged at a wide pitch are arranged alternately or are installed at appropriate positions. Combination example 5 of the tooth support member 54 Six handling tooth support members 54 are provided at equal intervals around the circumferential direction of the handling drum 53, and three handling tooth support members 54 (C) in which the handling teeth 52 are arranged at a narrow pitch on the inlet side and a wide pitch on the outlet side, and three handling tooth support members 54 (F) in which the handling teeth 52 are arranged at a wide pitch on the inlet side and a narrow pitch on the outlet side are alternately arranged or attached at an appropriate position. Combination example 6 of the tooth support member 54 Six handling tooth support members 54 are provided at equal intervals around the circumferential direction of the handling drum 53, and three handling tooth support members 54 (C) in which the handling teeth 52 are arranged at a narrow pitch on the inlet side and a wide pitch on the outlet side, and three handling tooth support members 54 (E) in which the handling teeth 52 are arranged at a wide pitch on the inlet and outlet sides and a narrow pitch in the middle position are alternately arranged or attached in an appropriate position. Combination example 7 of the tooth support member 54 Six handling tooth support members 54 are provided at equal intervals around the circumferential direction of the handling drum 53, and three handling tooth support members 54 (C) in which the handling teeth 52 are arranged at a narrow pitch on the inlet side and a wide pitch on the outlet side, and three handling tooth support members 54 (D) in which the handling teeth 52 are arranged at a narrow pitch on the inlet and outlet sides and a wide pitch in the middle position are alternately arranged or attached in an appropriate position. Example 8 of combination of tooth support member 54 To provide six handling tooth support members 54 at equal intervals around the circumferential direction of the handling drum 53, two handling tooth support members 54 (C) in which the handling teeth 52 are arranged at a narrow pitch on the inlet side and a wide pitch on the outlet side, and four handling tooth support members 54 (B) in which the handling teeth 52 are arranged at a narrow pitch are attached in appropriate positions. Example 9 of combination of tooth support member 54 To provide six handling tooth support members 54 at equal intervals around the circumferential direction of the handling drum 53, two handling tooth support members 54 (C) in which the handling teeth 52 are arranged at a narrow pitch on the inlet side and a wide pitch on the outlet side, and four handling tooth support members 54 (F) in which the handling teeth 52 are arranged at a wide pitch on the inlet side and a narrow pitch on the outlet side are attached in appropriate positions. Example 10 of combination of tooth support member 54 To provide six handling tooth support members 54 at equal intervals around the circumferential direction of the handling drum 53, two handling tooth support members 54 (C) in which the handling teeth 52 are arranged at a narrow pitch on the inlet side and a wide pitch on the outlet side, and four handling tooth support members 54 (E) in which the handling teeth 52 are arranged at a wide pitch on the inlet and outlet sides and a narrow pitch in the middle position are attached in appropriate positions. Example 11 of combination of the tooth support member 54 To provide six handling tooth support members 54 at equal intervals around the circumferential direction of the handling drum 53, two handling tooth support members 54 (C) in which the handling teeth 52 are arranged at a narrow pitch on the inlet side and a wide pitch on the outlet side, and four handling tooth support members 54 (D) in which the handling teeth 52 are arranged at a narrow pitch on the inlet and outlet sides and a wide pitch in the middle position are attached in appropriate positions. Combination example 12 of the tooth support member 54 To provide six handling tooth support members 54 at equal intervals around the circumferential direction of the handling drum 53, two handling tooth support members 54 (C) in which the handling teeth 52 are arranged at a narrow pitch on the inlet side and a wide pitch on the outlet side, and four handling tooth support members 54 (A) in which the handling teeth 52 are arranged at a wide pitch are attached in appropriate positions.

[0057] <Another embodiment> (1) In the above embodiment 1, when the clogging sensor 70 detects a clogging for a predetermined period of time or longer, the control device 6f automatically decelerates the HST lever 6c using an actuator to decelerate the traveling speed of the machine to a predetermined speed and clear the clogging. However, in embodiment 2, the position of the dust feed guide 80 may be changed to control the amount of dust fed and clear the clogging.

[0058] In other words, the dust transfer guide 80 is configured so that the angle can be changed by the dust transfer guide angle changing actuator, and when the clogging sensor 70 detects a clogging for a predetermined period of time or longer, the control device 6f activates the dust transfer guide angle changing actuator to open the dust transfer guide 80 (the angle becomes gentler in the feed direction), and adjusts the action of sending the straw, straw chips, etc. in the handling chamber 51 to the outlet side to strengthen the clogging, thereby eliminating the clogging.

[0059] In detail, when the jam sensor 70 detects a jam for one second or more continuously, the control device 6f sounds the alarm buzzer 6h of the driving unit 6 and / or turns on the warning lamp of the monitor 6g to notify the operator of the occurrence of a jam. The notification may be any other method such as a voice alarm.

[0060] If the operator notices the notification, he or she manually operates the dust feed guide angle change actuator to open the dust feed guide 80 (the angle becomes gentler in the feed direction) and adjusts it so that the effect of sending the straw, straw chips, etc. in the handling chamber 51 to the outlet side is stronger, thereby clearing the blockage, and once the blockage detection by the blockage sensor 70 is cleared, he or she manually operates the dust feed guide angle change actuator to return the dust feed guide 80 to its original angle and continue harvesting work.

[0061] If the operator does not notice the alert and the clogging sensor 70 detects a clogging for more than two consecutive seconds, the control device 6f activates the dust feed guide angle change actuator to open the dust feed guide 80 at a predetermined angle (the angle in the feed direction becomes gentler by a predetermined angle) and adjusts the action of sending grain straw, straw chips, etc. in the handling chamber 51 to the exit side to be stronger.

[0062] If the clogging sensor 70 detects a clogging for four or more consecutive seconds despite the dust transport guide 80 being opened to a specified angle, the control device 6f activates the dust transport guide angle change actuator to open the dust transport guide 80 to a further specified angle (the angle in the feed direction becomes further relaxed by a specified angle), thereby adjusting the action of sending grain straw, straw chips, etc. in the handling chamber 51 to the outlet side to be even stronger.

[0063] If the clogging sensor 70 detects clogging continuously for 5 seconds or more even though the dust sending guide 80 is further opened by a predetermined angle, the control device 6f turns off the prime mover start switch 6b to stop the prime mover (engine).

[0064] After the prime mover is stopped, the control device 6f turns off the reaping / threshing clutch lever 6e and puts the HST lever 6c in neutral, otherwise the prime mover will not start even if the prime mover start switch 6b is turned on.

[0065] In addition, when the dust feed guide angle change actuator is operated to open the dust feed guide 80 to a predetermined angle, or when the dust feed guide angle change actuator is operated to open the dust feed guide 80 further to a predetermined angle, if the clogging detection by the clogging sensor 70 is cleared and the clogging sensor 70 does not detect a clogging for more than two seconds, the control device 6f operates the dust feed guide angle change actuator to return the dust feed guide 80 to its original angle.

[0066] (2) When the clogging sensor 70 of embodiment 1 detects a clogging for a predetermined period of time or longer, the control device 6f may automatically decelerate the HST lever 6c using an actuator to decelerate the body's traveling speed to a predetermined speed and clear the clogging, and the means of embodiment 2 may also be used to change the posture of the dust feed guide 80 to control the amount of dust fed and clear the clogging.

[0067] (3) In the first and second embodiments, the clogging sensor 70 is provided at an upper position of the part where the handling teeth 52 move from bottom to top on the inlet side of the handling chamber 51 (the front half of the handling chamber 51), but the clogging sensor 70 may be provided at a position (apex) where the handling teeth 52 moves from bottom to top and changes to a downward movement, as shown in Fig. 4. The clogging sensor 70 is provided on the upper handling drum cover 50c.

[0068] 5, a jam sensor 70 may be provided above the portion where the handling teeth 52 move downward. The jam sensor 70 is provided on the upper handling cylinder cover 50c. [Explanation of symbols]

[0069] 2 Running gear 4 Reaping section 5. Threshing Equipment 6g Notification means (monitor) 6h Notification method (alarm buzzer) 51 Handling room 52 Teeth Treatment 53 Handling Body 70 Clogging Sensor

Claims

1. In a combine harvester provided with a threshing device (5) for threshing the harvested crop by a reaping section (4) provided at the front of a machine body moving forward by a traveling device (2), a threshing drum (53) having threshing teeth (52) is driven to rotate in a threshing chamber (51) of the threshing device (5), and a jamming sensor (70) for detecting jamming of the harvested crop is provided above a portion where the threshing teeth (52) move from bottom to top in the first half of the threshing process in which the harvested crop moves from the entrance side of the threshing chamber (51) to the exit side, A combine harvester characterized in that the forward speed of the machine body is gradually reduced by a predetermined amount each time a clogging detection by a clogging sensor (70) continues for a predetermined period of time or more.

2. In a combine harvester provided with a threshing device (5) for threshing the harvested crop by a reaping section (4) provided at the front of a machine body moving forward by a traveling device (2), a threshing drum (53) having threshing teeth (52) is driven to rotate in a threshing chamber (51) of the threshing device (5), and a jamming sensor (70) for detecting jamming of the harvested crop is provided above a portion where the threshing teeth (52) move from bottom to top in the first half of the threshing process in which the harvested crop moves from the entrance side of the threshing chamber (51) to the exit side, A combine harvester characterized in that, when the detection of a clogging by a clogging sensor (70) continues for a predetermined period of time or longer, the prime mover is stopped.

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