JP2015116134A - General-purpose combine-harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a general-purpose combine-harvester performing a screening control which, when a layer thickness sensor S consists of a potentiometer, prevents failure of the potentiometer so as to increase the service life of the layer thickness sensor S so that the layer thickness of a processed product on an oscillating screening body 60 can be accurately detected for a long time.SOLUTION: In a general-purpose combine-harvester, a layer thickness sensor S is disposed between a receiving net 54 and an oscillating screening body 60 so as to detect existence of a processed product or layer thickness based on a rotation angle of an operation piece 84 arranged at a rotational shaft 82a of a potentiometer, and at least an upper side of the layer thickness sensor S is protected so that the processed product leaked down from the receiving net 54 does not directly collide with the potentiometer 82 and the rotational shaft 82a thereof. More specifically a protective covering covers the upper side of the layer thickness sensor S to protect the layer thickness sensor S.

Description

  The present invention relates to a general-purpose combine that harvests and harvests crops such as wheat, buckwheat, rapeseed, soybean, or paddy rice, and more specifically, a sensor that detects the layer thickness of a processed product on a rocking sorter. It is related with the general purpose combine provided with.

  In general, a general-purpose combiner is provided with a control unit, a threshing unit, and a grain tank in a machine body that includes a traveling device, and a header unit that includes a scraping reel, a cutting blade, an auger, and a feeder in front of the machine body. In addition, the threshing unit includes a handling chamber into which the cereals conveyed by the feeder are placed, and a sorting room provided below the handling chamber. The threshing unit sheds the cereals by a handling cylinder and a receiving net provided in the handling chamber. It is configured to sort the processed material leaked from the net into grains and dust by the swinging sorter provided in the sorting chamber and the sorting wind of the fan.

  The handling cylinder provided in the handling chamber includes a cylindrically formed rotor, a spiral screw attached to the outer periphery of the rotor, and a plurality of teeth that are attached to the outer periphery of the screw at a predetermined pitch. While conveying the cereals thrown into the chamber backward with a screw, the cereals are rubbed against the receiving net with a screw or a tooth-handling on the outer periphery of the rotor that rotates at high speed, and the grain is removed. Therefore, it is compared with the one that handles the grain on the tip side with the tooth handling provided on the barrel that rotates at a low speed, such as a self-decomposing combine, and that the grain that has been shattered is leaked from the receiving net. Thus, the speed of the processed material that leaks from the receiving net and falls onto the swinging sorter is increased. Further, in the general-purpose combiner, the whole harvested cereal straw is put into the handling chamber, so that a large amount of swarf, mud, etc. are mixed with the processed material falling on the rocking sorter, and the amount of the processed material increases as a whole.

  In the self-detaching combine, the layer thickness of the processed material dropped on the rocking sorter is set in order to perform the process of sorting into grains and dust with the rocking sorter and the fan sorting wind. It is known to detect with a sensor and automatically control the opening degree of the chaff sheave and the air flow rate of the red pepper fan based on the detection result (see, for example, Patent Document 1 and Patent Document 2).

Japanese Utility Model Publication No. 5-2642 Japanese Patent Laid-Open No. 11-178431

  However, when the self-decomposing combine selection control disclosed in Patent Document 1 and Patent Document 2 is applied to a general-purpose combine, the following problems are raised. That is, in the general-purpose combiner, the speed of the processed material that leaks from the receiving net and falls onto the swing sorter is high, and the amount of processed material increases. For this reason, when the layer thickness sensor is configured with a potentiometer, the impact force when the workpiece collides with the potentiometer is large, and the potentiometer repeatedly collides with the potentiometer. In addition, a large amount of sawdust, mud, etc. are mixed in the processed material, so that these are wrapped around the layer thickness sensor and the accurate layer thickness cannot be detected. The thickness sensor must be maintained, and there is a problem that crop harvesting work cannot be performed efficiently.

  Therefore, the present invention provides a general-purpose combiner for performing sorting control. When the layer thickness sensor is composed of a potentiometer, the potentiometer is prevented from malfunctioning, extending the life of the layer thickness sensor, and swinging sorters over a long period of time. It is an object of the present invention to provide a general purpose combine capable of accurately detecting the layer thickness of the processed material. In addition, the potentiometer failure is caused by the slight vibration generated by the impact force when the workpiece collides with the potentiometer, or between the brush and the resistance element due to the ingress of dust on the body case and coupler. The wear of the sliding part and the contact failure caused by it can be considered. Furthermore, it is conceivable that the potentiometer operating piece is deformed by an impact force and an accurate layer thickness cannot be detected. Therefore, a specific object of the present invention is to protect a potentiometer, its rotating shaft, or a work piece from directly colliding with a processed material.

  In order to solve the above-mentioned problems, the present invention firstly provides a control unit, a threshing unit, and a grain tank in a machine body provided with a traveling device, and a header including a scraping reel, a cutting blade, an auger, and a feeder in front of the machine body. In the general-purpose combiner provided with a section, the threshing section includes a handling chamber for loading cereals conveyed by a feeder and a sorting chamber provided below the handling chamber, and a handling cylinder and a receiving net provided in the handling chamber. The sorghum is crushed by the screen, and the processed material leaked from the receiving net is sorted into the grain and dust by the swinging sorter provided in the sorting chamber and the sorting wind of the fan, and the swinging sorter The layer thickness sensor detects the presence or absence or the layer thickness of the processed material that has fallen on the surface, and the control device performs sorting control or notification of the sorting state based on the detection result. The layer thickness sensor is a potentiometer. On the axis of rotation Provided between the receiving mesh and the rocking sorter so as to detect the presence / absence of the processing object or the layer thickness based on the rotation angle of the digitized operating piece, and the processing material leaked from the receiving net is the potentiometer and its rotating shaft. It is characterized in that it is disposed in a state where at least the upper side thereof is protected so as not to directly collide with.

  Secondly, the present invention is characterized in that a protective cover is provided above the layer thickness sensor and the upper side of the layer thickness sensor is covered by the protective cover so that the workpiece does not directly collide with the layer thickness sensor. And Thirdly, according to the present invention, the working piece of the layer thickness sensor is configured to be changeable between a detection posture and a retracted posture, and the protective cover is disposed at an upper side thereof not only in the detection posture of the working piece but also in the retracted posture. It is characterized by having a width and length covering Furthermore, the present invention is characterized in that, fourthly, the layer thickness sensor and the protective cover are attached to the lower frame to which the receiving net of the handling chamber is attached, and the protective cover is disposed with a predetermined gap between the protective net and the receiving net. And And, according to the present invention, fifthly, the protective cover is integrally formed with the bracket for attaching the layer thickness sensor, and the layer thickness sensor is attached to the side surface of the lower frame for attaching the receiving net of the handling chamber via the bracket, An upper side, a front side, and a side side of the layer thickness sensor are covered with the protective cover, the lower frame, and the bracket.

  According to the general-purpose combiner of the present invention, the layer thickness sensor for detecting the presence or absence of the processing object dropped on the rocking sorter is based on the rotation angle of the operating piece attached to the rotary shaft of the potentiometer. Alternatively, it is provided between the receiving net and the rocking sorter so as to detect the layer thickness, and the upper side is arranged so that the processed material leaked from the receiving net does not directly collide with the potentiometer and its rotating shaft. Since it is arranged at least in a protected state, there is no direct collision between the potentiometer and its rotating shaft and the processed material that leaks from the receiving net and falls on the swing sorter, and the processed material does not collide with the potentiometer. The wear of the sliding part between the brush and the resistance element due to the fine vibration generated by the dust and the intrusion of dust, and the failure of the potentiometer due to the contact failure caused thereby can be prevented, and the life of the layer thickness sensor S can be reduced. The layer thickness of the oscillating sorting member on treated for a long time and place can be detected accurately.

  In addition, according to the general-purpose combine of the present invention, a protective cover is provided above the layer thickness sensor, and the workpiece covers the upper side of the layer thickness sensor so that the workpiece does not directly collide with the layer thickness sensor. Thus, even if the layer thickness sensor is provided between the receiving screen on the rocking sorter so that the presence or absence of the processed material or the layer thickness can be accurately detected, the upper side of the layer thickness sensor is easily covered by the protective cover. Thus, it is possible to effectively prevent the processing object from directly colliding with the layer thickness sensor, the processing object to be wound around the rotating shaft or the like, or the operating piece to be deformed by an impact force.

  Furthermore, according to the general-purpose combine of the present invention, the working piece of the layer thickness sensor is configured to be changeable between the detection posture and the retracted posture, and the protective cover is arranged not only in the detection posture of the working piece but also in the retracted posture. When the layer thickness sensor is not used or when the swing sorter is pulled out for maintenance, the operating piece is changed to the retracted position to It is possible to prevent problems such as the working piece hindering the post-treatment of the processed material, the processed material wrapping around the working piece, or the layer thickness sensor being damaged by the contact of the swinging sorter, and the storage posture. In this case, the work piece is covered with a protective cover, so that it prevents the work piece from colliding with the work piece to indirectly apply vibration to the potentiometer or to be deformed by impact force. Can.

  Further, according to the general-purpose combine of the present invention, the layer thickness sensor and the protective cover are attached to the lower frame to which the receiving net of the handling chamber is attached, and the protective cover is disposed with a predetermined gap between the receiving net and the receiving frame. In addition, there is no need to provide a separate stay for attaching the layer thickness sensor and the protective cover, and the layer thickness sensor is placed in the optimum position for detecting the layer thickness of the workpiece near the center in the left-right direction of the rocking sorter. Can be provided. In addition, the processed material leaking from the receiving network is dispersed around the protective cover through the gap above the protective cover, and then falls onto the rocking sorter, thus protecting the processed material from leaking from the receiving network. The cover is not hindered, and the necessary receiving network leakage area can be sufficiently secured.

  And according to the general-purpose combine of the present invention, the protective cover is formed integrally with the bracket for attaching the layer thickness sensor, and the layer thickness sensor is attached to the side surface of the lower frame for attaching the receiving net of the handling chamber via the bracket, Since the protective cover, lower frame, and bracket cover the upper side, front side, and side of the layer thickness sensor, the number of parts is reduced compared to the case where the protective cover and bracket are provided separately, and the management cost is reduced. In addition, the number of man-hours for attaching the protective cover and the bracket can be reduced, and the number of attaching parts such as bolts when attaching to the lower frame can be reduced to reduce the cost. In addition, the protective cover, lower frame, and bracket can be used effectively to cover the upper side, front side, and side of the layer thickness sensor. Therefore, the crop can be efficiently harvested.

It is a whole side view of a general purpose combine. It is a side view of a threshing part. It is sectional drawing of a threshing part. It is a top view of a rocking sorter. It is a front view which shows the attachment state of a layer thickness sensor. It is a perspective view which shows the state which made the layer thickness sensor the detection attitude | position. It is a perspective view which shows the state which made the layer thickness sensor the storing attitude | position. It is a side view which shows the state which made the layer thickness sensor the detection attitude | position. It is a side view which shows the state which made the layer thickness sensor the storing attitude | position. It is a side view which shows the arrangement | positioning state of a layer thickness sensor. It is a perspective view which shows the arrangement | positioning state of a layer thickness sensor. It is a back side perspective view of the threshing part which shows the wiring state of the wire harness of a layer thickness sensor.

  Embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the general-purpose combiner includes a left and right crawler type traveling device 1 and a rectangular frame-shaped body frame 3 provided above the track frame 2 of the traveling device 1, and The traveling device 1 is attached to be movable up and down by a hydraulic cylinder for posture control (not shown). Further, a threshing unit 4 for performing threshing and sorting of crops is provided on the left side in the traveling direction of the machine body frame 3, and a steering unit 5 and a grain tank 6 for storing grains are provided on the right and left sides. Furthermore, in front of the threshing unit 4 and the control unit 5, a header unit 7 that cuts the crop and conveys it to the threshing unit 4 is provided. An engine is mounted between the control unit 5 and the Glen tank 6, and the engine serves as a power source for driving the crawler traveling device 1, the threshing unit 4, the header unit 7, and the like.

  Here, the configuration of each part will be described in more detail. The header portion 7 provided on the front side of the machine body is configured by integrally connecting a feeder house 8, an auger frame 9, and a reel frame 10. Among these, the auger frame 9 is provided with a platform 11 formed by curving an iron plate, and a columnar auger 12 (platform auger) extending in the left-right direction is mounted on the platform 11 so as to be rotationally driven. . Further, left and right dividers 13 and reciprocating cutting blades 14 are provided at the front portion of the auger frame 9. Further, in the feeder house 8 formed in a box frame shape, the left and right transport chains 18 are wound between the rear drive sprocket 16 attached to the drive shaft 15 and the front drum 17, and the left and right transport chains 18. A feeder F is provided in which a plurality of slats 19 are horizontally mounted with a predetermined interval therebetween.

  Further, the reel frame 10 is provided with a take-up reel R, and the take-up reel R is a polygonal shaft in a side view that rotates integrally with the drive shaft that is rotatably supported at the left and right ends of the reel frame 10. And left and right rotating supports 20 having a shape (hexagonal shape in the embodiment). Further, a plurality of tine attachment rods 21 extending in the left-right direction are rotatably mounted on the apex portions of the left and right rotation supports 20, and each tine attachment rod 21 is spring-type tine 22 at predetermined intervals. Is attached in a drooping manner. At one lateral outer side of the rotation support body 20 is provided a posture holding rotating body 23 that rotates around an axis that is deviated from the axis of the drive shaft, and each vertex of the posture holding rotating body 23 is provided. By connecting the pivotal support body 24 provided on the one side and one side end of the tine attachment rod 21 via a link, the tine 22 is always held in the downward direction regardless of the rotation of the rotary support 20.

  In addition, the reel frame 10 is pivotally supported at the front ends of the left and right swing arms 25 pivotally supported on the upper portion of the auger frame 9, and the reel frame 10 is pivotally supported with one end attached to the feeder house 8. By operating the hydraulic cylinder 26 to expand and contract, the position of the take-up reel R can be adjusted back and forth with respect to the auger frame 9 via the swing arm 25. Further, an elevating hydraulic cylinder 27 is provided between the middle of the reel frame 10 and the auger frame 9, and the take-up reel R is attached to the auger frame 9 by extending and contracting the hydraulic cylinder 27. Can be adjusted up and down.

  And the header part 7 comprised as mentioned above is rotatably supported by the front part of the body frame 3 centering | focusing on the drive shaft 15 of the said feeder F, and between the feeder house 8 and the body frame 3 between it. The posture can be changed between a working state in which the front portion side of the header portion 7 is lowered and a non-working state in which the header portion 7 is raised by the extending and retracting operation of the provided lifting hydraulic cylinder 28. Further, the power transmitted from the engine to the drive shaft 15 of the feeder F through a threshing clutch and a mowing clutch (not shown) is transmitted to the feeder F to drive the transport chain 18 and is further not shown from the drive shaft 15. It is transmitted to the platform auger 12, the cutting blade 14, and the take-up reel R through a transmission device such as a sprocket, a chain, a cutting blade / reel clutch, a continuously variable transmission, etc., thereby driving each part of the header section 7. .

  Accordingly, when the aircraft is run in a working state in which the header portion 7 is lowered, the planted cereal straw in the field is divided into a cutting target and a non-cutting target by the left and right dividers 13, and among them, the setting of the cutting target The cereals are cut by the cutting blade 14 while being scraped into the platform 11 by the scraping reel R. Further, the culm scraped into the platform 11 is laterally fed to the front of the feeder house 8 by the platform auger 12, and the culm laterally fed to the feeder house 8 is further slat 19 attached to the transport chain 18. The whole of the harvested corn straw is thrown into the threshing unit 4 while passing through the lower part of the feeder house 8 while being locked to the threshing unit 4.

  In the header portion 7, a headlamp 29 is attached to the front end of the reel frame 10, and a direction indicator 30 and a rearview mirror 31 are attached to a stay 32 erected from the auger frame 9. Reference numeral 33 denotes a cover that covers the side of the platform 11, and reference numeral 34 denotes a cover that covers the transmission portion of the take-up reel R. Further, a ladder 35 is erected from the body frame 3 on the side of the rear side of the feeder house 8.

  Further, the threshing unit 4 is configured to move upward and downward by a rotor cover 36 that can be opened and closed upward via a hinge, a rotor side cover 37 that can be opened and closed laterally, and a detachable threshing cover (front cover 38 and rear cover 39). The left side is covered, and the back is covered with a dust cover 40 that can be opened and closed freely. Furthermore, an auger 41 is provided behind the Glen tank 6 to discharge the grains stored in the Glen tank 6 to the outside of the machine. The control unit 5 includes a seat 42, a front panel 43 provided in front of the seat 42, a multi-steering lever 44 projecting from the front panel 43 (raising and lowering the header unit 7 and steering the aircraft), a seat In addition to a side panel 45 provided on the side of 42, a travel shift lever 46 for operating a hydrostatic continuously variable transmission provided on the side panel 45, a meter panel, a monitor, a switch for automatic control and manual control The operation tools such as the volume, volume, and various operation levers are concentrated.

  Next, the details of the threshing unit 4 will be described. As shown in FIGS. 2 and 3, the threshing unit 4 is disposed below the handling chamber 47 and the handling chamber 47 into which the cereals conveyed by the feeder F are put. And a formed sorting chamber 48. Among these, a handling cylinder R that rotates around the longitudinal axis of the machine body is pivoted in the handling chamber 47, and this handling cylinder R has a conical front part and a cylindrical rear part. 49, a spiral screw 50 attached to the outer periphery of the rotor 49, a plurality of superhard teeth 51 attached to the outer periphery of the screw 50 at a predetermined pitch, and a dust feeding body attached to the outer periphery of the terminal portion of the rotor 49 52. Further, an inlet receiving plate 53 for receiving the cereals conveyed by the feeder F is provided below the handling cylinder R, and further, a circular shape is provided so as to cover the lower periphery of the handling cylinder R following the inlet receiving plate 53. An arc-shaped receiving net 54 is detachably provided.

  The receiving net 54 is divided into two parts in the left-right direction and the front-rear direction of the handling chamber 47, and is constituted by a total of four receiving nets. Further, as shown in FIGS. 10 and 11, each receiving net 54 is provided with a net 54c and a plurality of net retainers 54b with a crimp net 54c, and handles pins 54d provided at two positions on the upper end of the net 54a. Each receiving net 54 is inserted into the handling chamber 47 by being inserted into insertion holes provided in the upper frames 55 and 56 of the chamber 47 and fixing the lower end of the mesh frame 54 a to the lower frame 57 of the handling chamber 47 with a plurality of bolts 58. It is attached. Further, the openable and closable rotor cover 36 covering the upper portion of the handling chamber 47 is pivotally attached with six dust feed valves 59 facing the upper side of the rotor 49, and the dust feed valves 59 are plates having an arcuate bottom surface. The angle of the rotor 49 with respect to the rotational axis of the rotor 49 can be set individually, or by automatically adjusting the angle of the dust feed valve 59 by the threshing load, the cereals can be moved backward while allowing the threshing load to escape moderately. It can be transported smoothly. Then, the cereals thrown into the handling chamber 47 are conveyed while being loosened by the screw 50 and the dust feed valve 59 toward the rear side of the machine body, and circulate on the outer periphery of the rotor 49 by the screw 50 and the carbide handle 51. In the meantime, it is rubbed against the receiving mesh 54 to perform the grain removal treatment.

  The sorting chamber 48 formed on the lower side of the handling chamber 47 is provided with a swinging sorter 60. The swinging sorter 60 has a swinging mechanism including a link 61a, a drive link 61b, and the like at the front and rear thereof. Is supported so as to be swingable back and forth. Further, below the swinging sorter 60, there are provided a tang fan 62 and a turbo fan 63 that generate sorting wind toward the swing sorter 60. The rocking sorter 60 has an upper and lower two-stage structure, and is composed of an upper feed pan 64, a chaff sheave 65, and a stroller 66, and a lower grain sheave 67, a chaff sheave 68, and a stroller 69, which are arranged in front and rear. The processed material is sorted by specific gravity by swinging. The swing sorter 60 is configured so that maintenance can be performed by pulling backward along the side wall of the handling chamber 47 by releasing the connection with the swing mechanism.

  Further, the feed pan 64 is a corrugated transfer plate that receives the processed material that has leaked from the receiving net 54 and falls and transfers it to the rear. Further, the chaff sheaves 65 and 68 are composed of a plurality of fins 65a and 68a arranged in parallel in the front-rear direction, and the opening degree of the fins 65a of the upper chaff sheave 65 can be changed by a fin drive motor (not shown). The fin 68a of the lower chaff sheave 68 is fixed at a predetermined opening degree. Then, the processed product reaching the rear end of the feed pan 64 is sent to the upper chaff sheave 65, and is subjected to leakage selection while being selected by the selection air of the Kara fan 62, and further, a grain sieve comprising a predetermined mesh. The grain that has leaked 67 is guided down by the first flow plate 70 and falls onto the first spiral 71 as the first thing. In addition, the processed material transferred to the upper stroller 66, the lower chaff sheave 68 and the stroller 69 is selected by the sorting air of the tang fan 62 and the turbo fan 63, and the second thing that has leaked them. Is guided down by the second flow plate 72 and falls onto the second spiral 73.

  Then, dust such as sawdust transferred to the end of the strollers 66 and 69 is discharged out of the machine from a discharge port 74 provided at the rear part of the machine body together with the waste conveyed to the rear end part of the receiving net 54. The In this case, swarf, waste, etc. are discharged and guided to the center side of the machine body by a dust guide plate 76 fixed to a sink plate 75 provided at the rear end of the sorting chamber 48. Etc. are prevented from being discharged, and the cutting operation can be performed smoothly. Moreover, when the cutting operation is not performed, the discharge port 74 can be closed by closing the dust cover 40. On the upper feed pan 64 and chaff sheave 65 of the swinging sorter 60, there are provided four plates 77a, 77b, 77c and 77d on the left and right sides as shown in FIG. , 77b, 77c, 77d are arranged so as to be inclined closer to the left and right center of the swinging sorter 60 toward the rear end side, and the processed material that tends to stay near the left and right ends of the swinging sorter 60 is placed on the center side. At the same time, the processed product is dispersed so as to form a uniform layer on the rocking sorter 60, thereby improving the sorting performance.

  In addition, the grain laterally fed by the first spiral 71 is pumped into the Glen tank 6 by a bucket conveyor and an upper horizontal spiral (not shown), and the second product laterally fed by the second spiral 73 is illustrated. The slat conveyor and the reducing horizontal spiral 78 are returned to the front part of the handling chamber 47 and the grain removal process is performed again, or the lid 80 provided in the middle of the reducing horizontal spiral cylinder 79 is opened to feed the second item into the feed pan. It can be dropped again on 64 and re-sorted.

  In the threshing unit 4 configured as described above, power is transmitted from the engine to a countershaft via a threshing clutch (not shown), and a reduction horizontal spiral is formed from one end of the countershaft via a pulley, a belt, and a gear. 78 is driven, and the handling cylinder R is also rotationally driven from the countershaft through a transmission and a pulley 81 provided at the rear, and further from the other end of the countershaft through a pulley and a belt, the fan 60 and the second spiral. 73, the swing mechanism of the first spiral 71, the turbo fan 63, and the swing sorter 60 is driven from the second spiral shaft, and the slat conveyor from the second spiral shaft and the bucket conveyor from the first spiral shaft. The upper horizontal spiral is driven, and the cereals that have been cut and conveyed by the header section 7 are threshed and sorted.

  Next, the layer thickness sensor S of the present invention and its mounting structure will be described. As shown in FIGS. 5 to 9, the layer thickness sensor S detects a rotation angle and converts it into a voltage (rotary potentiometer) 82. And an operating piece 84 attached to the rotating shaft 82a with a nut 83. The actuating piece 84 is bent at a substantially right angle from a base portion 84a attached to the rotating shaft 82a, and forms a warped contact surface 84b whose front end portion is widened in the left-right direction and bent rearward. Further, the layer thickness sensor S includes a bracket 85 for attaching itself.

  The bracket 85 includes a sensor attachment portion 85a provided near the rear portion, a front protection portion 85b bent substantially at a right angle from the sensor attachment portion 85a, and a bracket 85 itself bent further at a substantially right angle from the front protection portion 85b. The sensor mounting portion 85a includes a hole that fits into a positioning cylinder portion 82c formed on the end surface of the main body case 82b of the potentiometer 82, and a hole that sandwiches the hole. And a bolt insertion hole provided at the top and bottom, and a protrusion 85d for locking a stopper 86 described later. Further, the front protection portion 85b is wide so as to substantially cover the front side of the main body case 82b of the potentiometer 82. Further, a bolt insertion hole is formed in the attachment portion 85c. When the thickness sensor S is attached to the bracket 85, the positioning cylinder portion 82c of the potentiometer 82 is fitted into the hole provided in the sensor attachment portion 85a of the bracket 85, and the long holes provided in the left and right flanges 82d of the potentiometer 82. Then, the bolt 87 is passed through the bolt insertion hole and fixed with the nut 88.

  The layer thickness sensor S includes a protective cover 89 that covers the upper side thereof. The protective cover 89 includes a main body case 82b of the potentiometer 82, a coupler 82e integrally projecting on the side surface of the main body case 82b, a counter coupler 90 coupled to the coupler 82e, a rotating shaft 82a, and a rotation region of the operating piece 84. The lower and upper inclined surfaces 89b and 89c are provided at the front and rear by bending the upper part of the rotating shaft 82a as a vertex 89a. Further, the end portion on the front side of the protective cover 89 is bent to provide a mounting portion 89d for the stopper 86. The protective cover 89 is integrally formed by welding to the upper end surfaces of the sensor mounting portion 85a and the front protective portion 85b of the bracket 85.

  Further, in the layer thickness sensor S, a stopper 86 is attached to the attachment portion 89 d of the protective cover 89 using a bolt 91 and a nut 92. The stopper 86 is constituted by a torsion coil spring, one end 86a of the spring is received by the lower surface of the protective cover 89, and the multi-end 86b of the spring is bent at the tip to constitute an action portion 86c of the stopper. Accordingly, when the distal end side of the action portion 86c of the stopper 86 is locked to the protrusion 85d of the bracket 85, the action portion 86c rotates the operation piece 84 from the suspended position to the front side with the contact surface 84b of the operation piece 84. And the initial rotation position of the operating piece 84 is set. Further, when the distal end side of the action portion 86c of the stopper 86 is removed from the projection 85d of the bracket 85, the action portion 86c of the stopper 86 is rotated rearward by the torsional moment to lift the operation piece 84 upward, thereby the operation piece 84. Is changed from the detected posture to the retracted (retracted) posture.

  In the layer thickness sensor S configured as described above, as shown in FIGS. 2 to 11, the working piece 84 is in contact with the processed material transferred backward on the rocking sorter 60 of the threshing unit 4. Then, it is arranged below the receiving net 54 so that the presence or absence of the processed material or the amount (layer thickness) of the processed material can be detected by the rotation angle. Specifically, the lower frame 57 that attaches and supports the receiving net 54 extends from the start end to the end of the swing sorting body 60, and is located above the center of the swing sorting body 60 in the left-right direction. By attaching the layer thickness sensor S to the lower frame 57, a dedicated stay or the like for attaching the layer thickness sensor S is not required, and the cost is reduced. More specifically, the mounting portion 85c of the bracket 85 to which the layer thickness sensor S is attached is overlapped with one side surface of the lower frame 57 formed into a square pipe shape by abutting the grooved steel and the Z-shaped steel, and the bolt 93 Threshing is performed by using a clamp 96 attached to the rear frame 95 at the rear end of the handling chamber 47 by passing the wire harness 94 extending from the coupler 90 through the opening 57a formed in the lower frame 57 and passing through the inside. It leads to the microcomputer unit provided outside the unit 4.

  As a result, the layer thickness sensor S covers the potentiometer 82 (the main body case 82b, the couplers 82e and 90, the rotating shaft 82a) and the entire upper side of the rotating area of the operating piece 84 by the protective cover 89, and the main body of the potentiometer 82 is covered. The front side of the case 82b is covered by the front protective portion 85b of the bracket 85, one side of the potentiometer 82 in the left-right direction is covered by the side surface of the lower frame 57, and the other side of the main body case 82b of the potentiometer 82 is the sensor mounting portion of the bracket 85. The wire harness 94 is routed through the inside of the lower frame 57. Therefore, the layer thickness sensor S is protected by the surroundings except for the lower part and the rear part, and a direct collision with the processed material that leaks from the receiving net 54 and falls on the swing sorter 60 is prevented. Therefore, it is possible to prevent the malfunction of the potentiometer 82 due to the wear of the sliding portion between the brush and the resistance element due to the minute vibration of the potentiometer 82 or the intrusion of dust, the contact failure caused thereby, and the malfunction due to the deformation of the operating piece 84. Thus, the lifetime of the layer thickness sensor S can be extended.

  The protective cover 89 covering the upper part of the layer thickness sensor S is provided below the receiving net 54 with a predetermined gap (space), so that the processed material leaking from the receiving net 54 above the protective cover 89 is this. Since it is dispersed around the protective cover 89 through the gap and falls onto the swinging sorter 60, the leakage area of the receiving net 54 is prevented from being reduced by the protective cover 89, and the protective cover 89 is lowered. The inclined surfaces 89b and 89c can prevent the processed material from sliding and prevent deposition. Further, the layer thickness sensor S is provided near the center of the swinging sorter 60 in the left-right direction, and detects a processed object that is a uniform layer by the gathering plates 77a, 77b, 77c, 77d. It is possible to accurately detect the layer thickness.

  Further, in the embodiment, four layer thickness sensors S are provided on the swing sorter 60. That is, the first sensor S1 is closer to the rear of the feed pan 64, the second sensor S2 and the third sensor S3 are closer to the front and rear of the chaff sheave 65, and the fourth sensor S4 is closer to the stroller 66. Located near the rear. These sensors S1 to S4 are all oscillated by the processed material that is fed back on the oscillating sorter 60 to detect the presence or absence of the processed material and the layer thickness at each point. Sends a signal to the control unit composed of units. Further, the control device instructs the fin drive motor to change the angle of the fin 65a of the chaff sheave 65 based on the detection results of the sensors S1 to S4, and automatically adjusts the layer thickness of the processed material to be able to perform appropriate swing selection. Control (chaff sheave control). Further, when the processed material is put on the rocking sorter 60 beyond the range that can be automatically controlled, the control device increases clogging of the threshing unit 4 and threshing / sorting loss. A lamp is used for notification, or the engine is stopped and the cutting operation is interrupted (overflow control).

  That is, in the chaff sheave control, for example, when the first sensor S1 detects that the cutting has started from a state in which there is no processed object, the angle of the fin 65a of the chaff sheave 65 is set to a preset initial opening. Control is performed. In addition, when the layer thickness of the processed material detected by the third sensor S3 during cutting is within a predetermined layer thickness range that can appropriately perform rocking selection, the opening degree of the fin 65a is maintained and the layer thickness is thin. Lowers the opening, conversely, increases the opening when the layer thickness is thick, and further increases the opening when the layer thickness of the processed material detected by the second sensor S2 is equal to or greater than a predetermined determination value. If it is less than the judgment value, control is performed to maintain the opening. And in overflow control, even if the opening degree of the fin 65a is the maximum and the fin 65a is fully opened, if the layer thickness of the processed material detected by the fourth sensor S4 is equal to or greater than the predetermined determination value, A warning buzzer and a lamp are used to notify that there is a possibility that the threshing / sorting loss may increase. Further, when this state continues for a certain period of time or more, control for stopping the engine is performed.

  The chaff sheave control is used exclusively for harvesting rice and wheat, and only overflow control is used for harvesting other crops. It is also possible to manually adjust the angle of the fins 65a of the chaff sheave 65 without performing these controls. In this case, the layer thickness sensor S is not necessary, and the detection posture can be left as it is. There is a possibility that the working piece 84 of the thickness sensor S prevents the post-process of the processing object, or the processing object is wound around the layer thickness sensor S and the layer thickness sensor S is damaged. Therefore, when the layer thickness sensor S is not used, when the rotor side cover 37 is opened, the side of the receiving net 54 is released and the stopper 86 can be reached, so that the engagement with the protrusion 85d of the bracket 85 is released. It is desirable to change the working piece 84 of the layer thickness sensor S from the detection posture to the retracted (retracted) posture. Similarly, when the swing sorter 60 is pulled backward for maintenance or returned to its original position, the swing sorter 60 may come into contact with the layer thickness sensor S and be damaged. It is desirable to change the operating piece 84 of the thickness sensor S from the detected posture to the retracted (retracted) posture.

  Although the embodiment of the present invention has been described above, the layer thickness sensor S of the present invention may be attached from the side frame of the swinging sorter 60 via a stay instead of being attached to the lower frame 57 of the receiving net 54, The protective cover 89 covering the upper part of the layer thickness sensor S may be separated from the bracket 85, and the mesh frame 54a of the receiving net 54 is partially projected toward the crimp net 54c to act as the protective cover 89. You may give it. Further, although the four layer thickness sensors S are used to perform the chaff sheave control and the overflow control, the roles of the sensors S1 to S2 can be shared by other sensors to reduce the number of sensors, or the individual sensors S1. It is also conceivable to change the attachment location of S2 on the swinging sorter 60, and the present invention is not limited to the above embodiment.

DESCRIPTION OF SYMBOLS 1 Crawler type traveling device 3 Airframe frame 4 Threshing part 5 Control part 6 Glen tank 7 Header part 47 Handling room 48 Sorting room 49 Rotor (handling cylinder)
54 Receiving network 57 Lower frame 60 Oscillating sorter 62 Kara fan 63 Turbo fan 82 Potentiometer 84 Operating piece 85 Bracket 89 Protective cover

Claims (5)

  In a general-purpose combine that provides a steering unit, a threshing unit, and a glen tank on a machine body that includes a traveling device, and a header unit that includes a scraping reel, a cutting blade, an auger, and a feeder in front of the machine body, the threshing unit is provided by a feeder. A handling chamber into which the cereals that have been transported are placed, and a sorting chamber provided below the handling chamber, the cereals are shed by the handling cylinder and the receiving net provided in the handling chamber, and leaked from the receiving net It is configured to sort the processed material into grains and dust by the swing sorting body provided in the sorting chamber and the sorting wind of the fan, and the presence or absence or the layer thickness of the treated product dropped on the swing sorting body is the layer thickness Based on the detection result, the control device is configured to perform sorting control or report the sorting state, and the layer thickness sensor is processed by the rotation angle of the operating piece attached to the rotary shaft of the potentiometer. Possession of things Alternatively, it is provided between the receiving net and the rocking sorter so as to detect the layer thickness, and the processed material leaked from the receiving net does not directly collide with the potentiometer and its rotating shaft. A general-purpose combine that is arranged in a state where it is protected at least.   The protective cover is provided above the layer thickness sensor, and the upper side of the layer thickness sensor is covered by the protective cover so that the workpiece does not directly collide with the layer thickness sensor. General purpose combine.   The working thickness of the layer thickness sensor is configured to be changeable between a detection posture and a retracted posture, and the protective cover has a width and a length that covers the upper side not only in the detection posture of the working piece but also in the retracted posture. The general-purpose combine according to claim 2, wherein   The layer thickness sensor and the protective cover are attached to a lower frame to which a receiving net of a handling chamber is attached, and the protective cover is disposed with a predetermined gap between the protective net and the receiving net. 3. General-purpose combine according to 3.   The protective cover is formed integrally with a bracket to which a layer thickness sensor is attached, and the layer thickness sensor is attached to a side surface of a lower frame to which a receiving net of a handling room is attached via a bracket, and the protective cover, the lower frame, and the bracket are used. 5. The general purpose combine according to claim 2, wherein the general-purpose combiner covers an upper side, a front side, and a side side of the layer thickness sensor.

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