JP2023066594A - Combine harvester - Google Patents

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

The present invention relates to combine harvesters.

Conventionally, as a threshing control for a combine, the angle of a dust feed plate (dust feed guide) is configured to be changeable, and a sensor is provided to detect the feeding reaction force of grain culms acting on the dust feed plate. The angle of the dust plate is controlled so that the detected value of the feeding reaction force of the grain culm acting on the dust plate becomes a predetermined value (see Patent Document 1).

JP 2009-055808 A

Since the sensor detects the feeding reaction force of the culms acting on the dust feed plate, it does not directly detect clogging caused by an increase in the amount of culms during the threshing process. Since the sensor is arranged in the portion where the cusps move from top to bottom, it is difficult to properly detect culm clogging, and it is difficult to perform good threshing control. There is also a problem that the reaction force cannot be detected when the dust feed plate is parallel to the rotating direction of the teeth.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a combine harvester capable of early and appropriate detection of clogging of culms in a hulling chamber, thereby performing good threshing.

The invention described in claim 1 is a combine harvester provided with a threshing device 5 for threshing harvested material harvested by a reaper 4 provided at the front of a machine body that moves forward by a traveling device 2. , the threshing cylinder 53 having the teeth 52 is driven to rotate, and the teeth 52 move from bottom to top in the first half of the threshing process while moving the harvested material from the entrance side to the exit side of the threshing chamber 51. This combine is provided with a clogging sensor 70 for detecting clogging of the harvested material at a position above the portion where the clogging occurs.

According to the first aspect of the invention, the threshing drum 53 having the threshing teeth 52 is driven to rotate in the threshing chamber 51 of the threshing device 5, and the harvested material moves from the inlet side of the threshing chamber 51 toward the outlet side. A pressure-sensitive clogging sensor 70 for detecting clogging of the harvest is provided at a position above the portion where the threshing teeth 52 move upward from the bottom in the first half of the threshing process. can be detected at an early stage in the first half of , and the upper position of the portion where the handle 52 moves from the bottom to the top is the portion where the harvested material is lifted and accumulated, and can be appropriately detected.

The invention according to claim 2 is the combine harvester according to claim 1, wherein the detection of clogging by the clogging sensor 70 activates the notification means 6g and 6h.

According to the invention of claim 2, in addition to the effects of the invention of claim 1, the notification means 6g and 6h are activated by the clogging detection of the clogging sensor 70, so that the operator can reduce the forward speed of the aircraft. It is possible to immediately perform an operation to clear the clogging, such as

The invention according to claim 3 is a combine harvester according to claim 1 or claim 2, wherein the forward speed of the machine body is reduced by a predetermined amount when the clogging detection by the clogging sensor 70 continues for a predetermined time or longer.

According to the invention of claim 3, in addition to the effects of the invention of claim 1 or claim 2, when the clogging detection of the clogging sensor 70 continues for a predetermined time or longer, the forward speed of the machine body is reduced by a predetermined amount. So the jam is cleared automatically.

According to the fourth aspect of the present invention, every time the clogging sensor 70 detects clogging for a predetermined period of time or more, the forward speed of the machine body is reduced stepwise by a predetermined amount. It's a combine.

According to a fifth aspect of the present invention, there is provided a combine harvester according to any one of the first to fourth aspects, wherein the prime mover is stopped when clogging detection by the clogging sensor 70 continues for a predetermined time or longer.

According to the invention of claim 5, in addition to the effects of the invention of any one of claims 1 to 4, when the clogging detection of the clogging sensor 70 continues for a predetermined time or longer, the motor is stopped. Therefore, clogging can be prevented, and damage to the transmission part caused by the unrotatable rotation of the handling cylinder 53 can be prevented.

It is a side view of a combine concerning an embodiment of the present invention. It is a sectional side view of the threshing device of the same combine. It is a front sectional view of the same threshing device. It is a front cross-sectional view of a threshing device showing another embodiment of the present invention. It is a front cross-sectional view of a threshing device showing another embodiment of the present invention. FIG. 4 is a side view of a bristle support member 54 showing different brisket patterns in an embodiment of the present invention.

An example in which the present invention is applied to a general-purpose combine harvester of all culm-throwing-in type will be described with reference to FIGS. 1 to 6. FIG.

<Overall configuration of combine harvester>
A general-purpose combine harvester harvests rice, wheat, and the like, and includes a body frame 1, a pair of left and right crawler-type traveling devices 2 that support the body, and a front portion of the body frame 1 that is supported so as to be able to swing vertically. an elevator 3, a reaping unit 4 connected to the front end of the elevator 3, a threshing device 5 arranged on the left side of the machine frame 1, a grain tank arranged on the right lateral side of the threshing device 5, and an elevator 3 and an operation section 6 arranged on the right side of the threshing device 5 and on the front side of the grain tank. The traveling device 2 , the elevator 3 , the reaping unit 4 , the threshing device 5 , the grain transfer device of the grain tank, etc. are driven by a motor (engine) mounted on the body frame 1 .

The operation unit 6 includes an operator seat 6a, a motor start switch 6b, an HST lever 6c for operating a hydrostatic continuously variable transmission that switches the drive to the traveling device 2 between forward and backward and continuously changes speed, and the right and left traveling device 2. A steering lever 6d for steering the machine body by turning left/right drive on and off and manually operating the reaping unit 4 up and down, a reaping and threshing clutch lever 6e, a control device 6f for controlling each constituent member, a monitor 6g, an alarm buzzer 6h, etc. is provided.

<Reaping part 4>
The reaping unit 4 includes a pair of left and right weeding rods 7, a platform 8, a rotary reel 9 for raking in the harvested material, and a clipper-type trimmer disposed across the left and right weeding rods 7 at the front end of the platform 8. It comprises a cutting device 10 and an auger 11 which is arranged on a platform 8 and rotates about an axis extending in the horizontal direction.

A hydraulic cylinder is arranged between the body frame 1 and the elevator 3, and the elevator 3 is provided so as to be swingable up and down with respect to the threshing device 5 around the axis in the horizontal direction. When the elevator 3 is operated to swing up and down, the reaping part 4 is in a working state in which the platform 8 is lowered close to the ground, and a non-working state in which the platform 8 is highly raised from the ground.

The rotatable reel 9 is rotatably supported by a reel arm 12 which is supported by the reel arm 12 so as to be vertically swingable about the swing axis P with respect to the reaping unit 4. It has a plurality of tines 14 supported to face the planted grain culm.

When the combine is moved forward while the reaping part 4 is lowered, the planted grain culms are divided into the reaping target and the non-reaping target by the splitting rod 7, and the reaping target is separated by the rotation of the rotary reel 9. Planted grain culms are cut by a clipper-type cutting device 10 while being rake into a platform 8. - 特許庁The harvested culms raked into the platform 8 are laterally fed to the front of the elevator 3 by the auger 11 and further raked into the elevator 3 . The harvested grain culms are conveyed rearward by the elevator 3, and the entire harvested grain culms from the root to the tip are thrown into the threshing device 5.例文帳に追加

<Ogre>
The auger 11 has right and left spiral spirals on the right and left sides of the front part of the elevator 3, laterally feeds the harvested culms to the front of the elevator 3, and rakes them into the front part of the elevator 3 by raking rods.

<Elevator>
The elevator 3 includes an elevator case body 30 having a rectangular cylindrical front end opening and a rear end opening, and a conveyor inside the elevator case body 30 for conveying harvested culms to the threshing device 5 at the rear.

<Threshing device>
In the threshing device 5, a threshing cylinder 53 having threshing teeth 52 is axially mounted in a cylindrical threshing chamber 51 formed by a threshing cylinder cover 50 in the upper portion thereof.

The handling cylinder 53 has a handling body supporting member 54 having a plurality of handling teeth 52 arranged at a predetermined distance from the handling body shaft 55 in the radial direction (radial direction). A polygonal drum portion 56 is provided inside the bristle tooth support member 54 . are arranged in the circumferential direction of the handling cylinder shaft 55 so as to face between the handling tooth supporting members 54.

The handling cylinder 53 is formed at the tip of the drum portion 56 into a conical tapered portion 57 whose rear side has a larger diameter, and is provided with a spiral 58 for conveying harvested grain culms rearward.

In the lower part of the handling chamber 51 formed by the handling cylinder cover 50, there are a general winch 59a, a swing sorting shelf 59b, a transfer shelf 59c, a sheave 59d, a straw rack 59e, a first conveyor 59f and a second conveyor 59g. is provided.

Further, at the rear of the threshing device 5, a spreader-type cutting processing device 60 for cutting straw waste discharged from the threshing device 5 is provided. A chopper 61 and a cutting edge 62 that can stand up and lie down are provided at the lower front portion of the cutting processing device 60 .

Therefore, when the harvested culms are supplied from the elevator 3 to the threshing device 5, the threshing cylinder 53 rotates in the direction of the arrow B in the threshing chamber 51 of the threshing device 5 to thresh. At this time, by rotating the threshing cylinder 53 in the direction of arrow A, the harvested grain culms are transferred to the outlet 50d side of the threshing chamber 51 while being threshed, and the threshed grains are transferred to the swinging sorting rack from the receiving net 50b. The grains fall on 59b and are sorted by swinging of swinging sorting rack 59b and air blowing from winnow 59a, and the grains dropped from swinging sorting rack 59b are collected by first conveyor 59f and sent to grain tank. The straw is sent to the cutting processing device 60 from the outlet 50d, and discharged out of the machine after being shredded.

The threshed grains are sent to a grain tank, temporarily stored, and discharged from the grain tank by the discharge auger 15 at any time.

The threshing drum cover 50 has a receiving net 50b formed in a net shape through which grains and the like fixed to the machine frame 50a of the threshing device 5 fall downward, and the inner side in the lateral direction of the machine body is rotatable with respect to the receiving net 50b. and an upper handling cylinder cover 50c formed of an upwardly opening plate body whose outer side is locked in a closed state by a locking device.

<Threshing blockage prevention control>
In the inlet side portion of the handling chamber 51 (the front half of the handling chamber 51), the culms stay above the portion where the handling drum 53 rotates in the direction of arrow A and the handling teeth 52 move from the bottom to the top. A pressure-sensitive clogging sensor 70 is provided to detect clogging. The clogging sensor 70 is provided on the upper handling cylinder cover 50c.

Then, when the clogging sensor 70 continuously detects clogging for one second or more, the control device 6f sounds an alarm buzzer 6h as an informing means of the operation unit 6 and/or turns on a warning lamp of the monitor 6g to indicate a threshing clog. Notify the operator of the occurrence. Note that the notification means may be any means other than the above, such as a voice alarm.

When the operator notices the notification, he/she immediately operates the HST lever 6c to decelerate the traveling speed of the machine body, the accumulation of grain culms in the handling chamber 51 is eliminated, the normal state is established, and the clogging sensor 70 detects clogging. The deceleration state is maintained until the clogging is cleared, and when the clogging detection by the clogging sensor 70 is cleared, the HST lever 6c is operated to return to the original running speed and continue the reaping work.

If the operator does not notice the notification and the jam sensor 70 continuously detects a jam for 2 seconds or more, the control device 6f automatically decelerates the HST lever 6c with the actuator to reduce the traveling speed of the aircraft by a predetermined speed. (eg, 10% slowdown).

If the clogging sensor 70 continuously detects clogging for four seconds or longer despite deceleration at the predetermined speed, the control device 6f automatically decelerates the HST lever 6c with the actuator to further reduce the traveling speed of the machine body to a predetermined speed. Reduce speed (eg, reduce speed by 20%).

If the clogging sensor 70 continuously detects clogging for 5 seconds or more despite the further deceleration at the predetermined speed, the control device 6f turns off the starting switch 6b of the prime mover to stop the prime mover (engine).

After stopping the motor, the control device 6f does not start the motor even if the starting switch 6b of the motor is turned on unless the reaping/threshing clutch lever 6e is turned off and the HST lever 6c is set to neutral. In addition, the reaping and threshing clutch lever 6e and the HST lever 6c are each provided with a position sensor, and each operating position is output to the control device 6f.

Therefore, unless the reaping and threshing clutch lever 6e is turned off and the HST lever 6c is not set to neutral, the motor will not restart even if the starting switch 6b of the motor is turned on. It can prevent breakage and damage caused by

The HST lever 6c is automatically decelerated by the actuator to reduce the traveling speed of the aircraft to a predetermined speed, or the HST lever 6c is automatically decelerated by the actuator to further reduce the traveling speed of the aircraft to a predetermined speed. If clogging detection by the clogging sensor 70 is canceled and the clogging sensor 70 does not detect clogging for 2 seconds or longer while decelerating, the controller 6f automatically operates the HST lever 6c with the actuator to return to the speed before deceleration. .

In short, at the entrance side of the handling chamber 51 (the front half of the handling chamber 51), the shaving drum 53 rotates in the direction of arrow A and the stalk 52 moves upward from the bottom. Since a pressure-sensitive clogging sensor 70 is provided for detecting that the grain culms are stagnant and clogged, it is detected that the grain culms are stagnant and clogged at the entrance side of the handling chamber 51 (the front half of the handling chamber 51). ) can be detected at an early stage, and the position above the portion where the cusps 52 move from bottom to top is a portion where the culms are lifted and accumulated, and the pressure is high, so it can be detected appropriately.

Further, by using the dead space above the portion where the handling tooth 52 moves from the bottom to the top for arranging the clogging sensor 70, the configuration becomes simple.

Then, when the clogging sensor 70 detects clogging, the control device 6f sounds the alarm buzzer 6h of the operation unit 6 and/or turns on the warning lamp of the monitor 6g to notify the operator of the occurrence of threshing clogging. , the HST lever 6c can be operated to immediately decelerate the traveling speed of the aircraft.

Then, even if the operator neglects to operate the HST lever 6c to remove the clogging, such as decelerating the traveling speed of the machine body, if the clogging sensor 70 continues to detect clogging for a predetermined period of time or longer, the control device 6f Since the HST lever 6c is automatically decelerated by the actuator to gradually decelerate the advancing speed of the body by a predetermined speed, the clogging is automatically eliminated.

Furthermore, if the clogging sensor 70 continues to detect clogging for a predetermined period of time or longer even after automatic deceleration, the control device 6f turns off the motor start switch 6b to stop the motor (engine). It is possible to prevent the cylinder 53 from becoming unrotatable and being damaged and the transmission part from being damaged.

<Handled teeth>
The culms are threshed as they advance from the entrance side to the exit side of the threshing chamber 51, and after the intermediate position, there is almost no chaff. Since the threshing teeth 52 are provided at the same pitch up to the side, the horse power is wasted in handling the straw without husks, and the horse power becomes insufficient when threshing the culms with a high yield. An unforeseen situation had occurred.

Therefore, in the cusp support member 54 provided with the cusp teeth 52 attached to the tractor cylinder 53, a plurality of patterns of cusp support members 54 having different arrangement of the cusp teeth 52 are prepared, and the cusp support members 54 having different cusp tooth patterns are combined. This makes it possible to improve threshing accuracy and reduce wasted horsepower.

That is, six patterns of bristle tooth support members 54 shown in FIGS. 6(A) to 6(F) are prepared.

In (A), the toothpicks 52 are provided at a wide pitch on the toothpick support member 54 .

In (B), the toothpicks 52 are provided on the toothpick support member 54 at a narrow pitch.

In (C), the toothpicks 52 are provided on the toothpick support member 54 with a narrow pitch on the inlet side and a wide pitch on the outlet side.

In (D), the toothpicks 52 are provided on the toothpick support member 54 with a narrow pitch on the inlet side and the outlet side and a wide pitch on the intermediate position.

In (E), the toothpicks 52 are provided on the toothpick support member 54 with a wide pitch on the inlet side and the outlet side and a narrow pitch on the intermediate position.

In (F), the toothpicks 52 are provided on the toothpick support member 54 with a wide pitch on the inlet side and a narrow pitch on the outlet side.
・Combination example 1 of the toothpick support member 54
In order to provide six bristle tooth support members 54 equidistantly in the circumferential direction on the servicing cylinder 53, three bristle tooth support members 54 are provided in which the bristle teeth 52 of (C) are provided with a narrow pitch on the inlet side and a wide pitch on the outlet side. In addition, three bristle tooth support members 54 in which the bristle teeth 52 of (B) are provided at a narrow pitch are arranged alternately, or arranged and attached at appropriate positions.

Therefore, the narrow-pitch threshing teeth 52 efficiently thresh the stalks at the entrance side of the threshing chamber 51, and the wide-pitch threshing teeth 52 are formed from the center position where the threshing is almost completed to the exit side, so that the load is small and the threshing is reduced. It improves accuracy and reduces waste of horse power, and exhibits good threshing performance.
・Combination example 2 of the toothpick support member 54
In order to provide six bridle tooth support members 54 at equal intervals in the circumferential direction on the bridle cylinder 53, the bridle teeth 52 of (D) are provided with a narrow pitch on the inlet side and outlet side and a wide pitch on the intermediate position. Install six 54.
・Combination example 3 of the toothpick support member 54
In order to provide six bristle tooth support members 54 equidistantly in the circumferential direction on the servicing cylinder 53, six bristle tooth supporting members 54 are provided in which the bristle teeth 52 of (C) are provided with a narrow pitch on the inlet side and a wide pitch on the outlet side. install one.
・Combination example 4 of the toothpick support member 54
In order to provide six bristle tooth support members 54 equidistantly in the circumferential direction on the servicing cylinder 53, three bristle tooth support members 54 are provided in which the bristle teeth 52 of (C) are provided with a narrow pitch on the inlet side and a wide pitch on the outlet side. (A) Three tooth support members 54 having wide tooth teeth 52 are arranged alternately, or arranged and attached at appropriate positions.
・Combination example 5 of the toothpick support member 54
In order to provide six bristle tooth support members 54 equidistantly in the circumferential direction on the servicing cylinder 53, three bristle tooth support members 54 are provided in which the bristle teeth 52 of (C) are provided with a narrow pitch on the inlet side and a wide pitch on the outlet side. (F) Three bristle teeth supporting members 54 having a wide pitch on the inlet side and a narrow pitch on the outlet side are arranged alternately or arranged and attached at appropriate positions.
・Combination example 6 of the toothpick support member 54
In order to provide six bristle tooth support members 54 equidistantly in the circumferential direction on the servicing cylinder 53, three bristle tooth support members 54 are provided in which the bristle teeth 52 of (C) are provided with a narrow pitch on the inlet side and a wide pitch on the outlet side. (E) Three bristle teeth support members 54 are arranged alternately or arranged at appropriate positions and attached. .
・Combination example 7 of the toothpick support member 54
In order to provide six bristle tooth support members 54 equidistantly in the circumferential direction on the servicing cylinder 53, three bristle tooth support members 54 are provided in which the bristle teeth 52 of (C) are provided with a narrow pitch on the inlet side and a wide pitch on the outlet side. (D) Three bristle teeth support members 54 are arranged alternately, or arranged at appropriate positions and attached. .
・Combination example 8 of the toothpick support member 54
In order to provide six bristle tooth support members 54 equidistantly in the circumferential direction on the servicing cylinder 53, two bristle tooth supporting members 54 are provided in which the bristle teeth 52 of (C) are provided with a narrow pitch on the inlet side and a wide pitch on the outlet side. Four bristle tooth supporting members 54 having bristle teeth 52 of (B) provided at a narrow pitch are arranged and attached at appropriate positions.
・Combination example 9 of the toothpick support member 54
In order to provide six bristle tooth support members 54 equidistantly in the circumferential direction on the servicing cylinder 53, two bristle tooth supporting members 54 are provided in which the bristle teeth 52 of (C) are provided with a narrow pitch on the inlet side and a wide pitch on the outlet side. Four bristle tooth supporting members 54 are arranged and attached at suitable positions, in which the bristle teeth 52 of (F) are provided at a wide pitch on the inlet side and narrowly on the outlet side.
・Combination example 10 of the toothpick support member 54
In order to provide six bristle tooth support members 54 equidistantly in the circumferential direction on the servicing cylinder 53, two bristle tooth supporting members 54 are provided in which the bristle teeth 52 of (C) are provided with a narrow pitch on the inlet side and a wide pitch on the outlet side. Four bristle tooth support members 54 are arranged and attached in (E) at appropriate positions.
・Combination example 11 of the toothpick support member 54
In order to provide six bristle tooth support members 54 equidistantly in the circumferential direction on the servicing cylinder 53, two bristle tooth supporting members 54 are provided in which the bristle teeth 52 of (C) are provided with a narrow pitch on the inlet side and a wide pitch on the outlet side. Four bristle tooth support members 54 are arranged and attached at appropriate positions, in which the bristle teeth 52 of (D) are provided at narrow pitches on the inlet and outlet sides and with wide pitches at the intermediate position.
・Combination example 12 of the toothpick support member 54
In order to provide six bristle tooth support members 54 equidistantly in the circumferential direction on the servicing cylinder 53, two bristle tooth supporting members 54 are provided in which the bristle teeth 52 of (C) are provided with a narrow pitch on the inlet side and a wide pitch on the outlet side. Four (A) treatment tooth support members 54 having wide tooth treatment teeth 52 are arranged and attached at appropriate positions.

<Another embodiment>
(1) In the first embodiment, when the jam sensor 70 detects a jam for a predetermined period of time or longer, the control device 6f automatically decelerates the HST lever 6c with the actuator to reduce the advancing speed of the machine body to a predetermined speed to clear the jam. However, as a second embodiment, the attitude of the dust feed guide 80 may be changed to control the amount of dust fed to eliminate clogging.

That is, the dust transport guide 80 is configured when the angle is changed by the dust transport guide angle changing actuator, and when the clogging sensor 70 detects clogging for a predetermined time or longer, the controller 6f operates the dust transport guide angle changing actuator to move the dust transport guide 80. The dust guide 80 is opened (the angle in the feeding direction becomes looser), and the clogging is eliminated by adjusting the effect of feeding grain stalks, straw scraps, etc. in the handling chamber 51 to the outlet side to be stronger.

More specifically, when the clogging sensor 70 continuously detects clogging for one second or more, the control device 6f sounds the alarm buzzer 6h of the operation unit 6 and/or turns on the warning lamp of the monitor 6g to notify the occurrence of threshing clogging. Notify the driver. Note that the notification may be any other than the above, such as a voice alarm.

When the operator notices the notification, the operator manually operates the dust feed guide angle changing actuator to open the dust feed guide 80 (the angle becomes looser in the feed direction), and the culms, straw waste, etc. in the handling chamber 51 are removed. When the clogging detection by the clogging sensor 70 is cleared, the dust feeding guide angle changing actuator is manually operated to return the dust feeding guide 80 to its original position. Return to angle and continue mowing.

If the operator does not notice the notification and the clogging sensor 70 continuously detects clogging for two seconds or longer, the control device 6f operates the dust feeding guide angle changing actuator to open the dust feeding guide 80 by a predetermined angle (in the feeding direction). The angle is loosened by a predetermined angle), and the action of sending grain stalks, straw scraps, etc. in the handling chamber 51 to the outlet side is strengthened.

If the clogging sensor 70 continuously detects clogging for four seconds or longer even though the dust guide 80 is opened at a predetermined angle, the controller 6f operates the dust guide angle changing actuator to open the dust guide 80. Further, the opening is adjusted to a predetermined angle (the angle in the feed direction is further loosened by a predetermined angle), and the action of feeding grain stalks, straw scraps, etc. in the handling chamber 51 to the outlet side is further strengthened.

If the clogging sensor 70 continues to detect clogging for 5 seconds or more despite the fact that the dust feed guide 80 is further opened by a predetermined angle, the control device 6f turns off the prime mover start switch 6b to start the prime mover (engine). Stop.

After stopping the motor, the control device 6f does not start the motor even if the starting switch 6b of the motor is turned on unless the reaping/threshing clutch lever 6e is turned off and the HST lever 6c is set to neutral.

Further, in a state in which the dust feeding guide angle changing actuator is operated to open the dust feeding guide 80 by a predetermined angle, or in a state in which the dust feeding guide angle changing actuator is operated to further open the dust feeding guide 80 by a predetermined angle. If clogging detection by the clogging sensor 70 is canceled and the clogging sensor 70 does not detect clogging for two seconds or more, the control device 6f operates the dust feeding guide angle change actuator to return the dust feeding guide 80 to the original angle. .

(2) When the clogging sensor 70 of the first embodiment detects clogging for a predetermined time or longer, the control device 6f automatically decelerates the HST lever 6c with the actuator to decelerate the traveling speed of the machine body to a predetermined speed to clear the clogging. It may also be used as a means for eliminating clogging by controlling the amount of dust transported by changing the attitude of the dust transport guide 80 of the second embodiment.

(3) In Embodiments 1 and 2, the clogging sensor 70 is provided on the inlet side of the handling chamber 51 (the front half of the handling chamber 51) above the portion where the handling tooth 52 moves upward from the bottom. However, as shown in FIG. 4, the clogging sensor 70 may be provided at a position (apex portion) where the handling teeth 52 move from bottom to top instead of moving downward. The clogging sensor 70 is provided on the upper handling cylinder cover 50c.

Further, as shown in FIG. 5, a clogging sensor 70 may be provided above the portion where the handling tooth 52 moves from top to bottom. The clogging sensor 70 is provided on the upper handling cylinder cover 50c.

2 traveling device 4 reaping unit 5 threshing device 6g reporting means (monitor)
6h Notification means (warning buzzer)
51 handling chamber 52 handling tooth 53 handling cylinder 70 clogging sensor

Claims (5)

A combine harvester provided with a threshing device (5) for threshing harvested material harvested by a reaping part (4) provided at the front of a machine body that advances by a traveling device (2), wherein a threshing chamber (51) of the threshing device (5) ), the threshing cylinder (53) having teeth (52) is driven to rotate, and the threshing is performed while the harvested material moves from the entrance side to the exit side of the threshing chamber (51). 52) is provided with a clogging sensor (70) for detecting clogging of the harvested material above the part where the part (52) moves from bottom to top. 2. A combine according to claim 1, wherein the notification means (6g, 6h) is activated by detection of clogging by the clogging sensor (70). 3. The combine according to claim 1 or 2, wherein the forward speed of the machine body is reduced by a predetermined amount when the clogging sensor (70) continues to detect clogging for a predetermined time or longer. The combine according to any one of claims 1 to 3, characterized in that the forward speed of the machine body is stepwise reduced by a predetermined amount every time the jam sensor (70) detects a jam for a predetermined time or more. . The combine according to any one of claims 1 to 4, wherein the prime mover is stopped when clogging detection by the clogging sensor (70) continues for a predetermined time or longer.

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