JP5809871B2 - Combine - Google Patents

Description

  The present invention relates to a combine that can accurately detect the amount of recovered grain.

  When performing harvesting work in a field, a combine that performs harvesting and threshing of grains and recovery of grains is often used. The combine travels on the field with a crawler, and harvests the culm with a cutting blade during the travel, conveys the harvested culm to the handling cylinder, and threshes. Then, the chaff sheave arranged below the barrel is used to sort the cocoons and grains separated from the cereal grains, and the selected grains are allowed to leak from the chaff sheave and are transferred to the grain tank via the screw conveyor. to recover.

  At the tip of the screw conveyor, a slat for attaching the grain into the grain tank is attached, and a grain amount detection sensor for detecting the amount of grain introduced by the slat is provided in the grain tank. It is. The grain amount detection sensor includes a piezoelectric element, and detects the grain amount based on pressure when the grains collide (for example, Patent Document 1).

Japanese Patent Laid-Open No. 2005-24381

  The grain that collided with the grain quantity sensor falls downward and accumulates in the grain tank. Generally, in the grain tank, a switch for detecting that the grain tank is full is provided in the vicinity of the blade. When the grain amount sensor is arranged in the immediate vicinity of the slats, the grains are concentrated in the vicinity of the slats, and the switch is turned on before becoming full. Therefore, a sufficient amount of grains cannot be stored in the grain tank.

  This invention is made | formed in view of such a situation, and even if it arrange | positions the sensor which detects a grain amount in a grain tank, the combine which can store sufficient quantity of grain in a grain tank The purpose is to provide.

The combine according to the present invention includes a threshing device that threshs the harvested cereal, a storage unit that stores the grain threshed by the threshing device, and a conveyance that conveys the grain from the threshing device to the storage unit. Means, and an opening formed on a side surface of the storage unit, and a casing that accommodates the transport unit, and is disposed in the storage unit, and detects the amount of grain introduced by the transport unit In the combine including the detection unit, the casing includes a guide surface that guides the grains input from the transport unit to the storage unit, and a non-guide surface that faces the guide surface through the transport unit. The detection means is located on the non-guide surface side and on the top surface side of the storage section in the storage section , the transport means is a screw conveyor, and the detection means is the guide surface. And screw Between the shaft portions of the bearings, located on the non-guide surface side with respect to the guide surface or a line intersecting the extended surface of the guide surface at a predetermined angle, and to the storage portion at the shaft portion at the end of the screw conveyor A slat for throwing in grains is provided, integrating means for integrating the detection results of the detecting means detected during a period in which the grains put in from the slats should collide, and detection in a period outside the period based on a detection result of said detecting means is characterized by Rukoto and means for removing steady state error contained in the accumulation result of said integrating means.

In the present invention, by positioning the detection means on the non-guide surface side facing the guide surface of the casing, a small amount of grain collides with the detection means compared to the guide surface side, and the grain is stored in the grain tank. Deposit on average. Further, by positioning the detection means on the top surface side, the detection means is prevented from being buried in the grain before the grain tank is full.
In addition, since the grain is conveyed along the outer periphery of the screw conveyor, the detection means is positioned on the non-guide surface side with respect to the guide surface or a line that intersects the extended surface of the guide surface at a predetermined angle. The amount of the grain that collides with can be reliably reduced as compared with the case where it is positioned on the guide surface side.
Further, by arranging the detection means outside the region, the difference between the detection value in the period when the grain should collide with the detection means and the detection value outside the period becomes clear, and the detection value in the period The steady-state deviation is removed based on the detected value outside the period.

  The combine according to the present invention is characterized in that the detection means has a collision part where a grain collides, and the collision part is arranged toward the opening.

  In the present invention, since the collision portion faces the opening, the detection means reliably detects even a small amount of grain.

  The combine according to the present invention is characterized in that the collision part is constituted by an elastic member, and the detection means supports the collision part and has a support part having higher hardness than the collision part. .

  In this invention, the abrasion resistance with respect to the collision of a grain improves by comprising a collision part with an elastic member. It also prevents grain damage during a collision.

  In the combine according to the present invention, the detecting means includes a fixing portion for fixing the supporting portion in the storage portion, and the elastic member is provided with an accommodation hole for accommodating a head of a screw. A through hole having a diameter smaller than that of the accommodation hole is provided in the portion, and a screw is inserted into the accommodation hole and the through hole, and a screw head is engaged with a peripheral portion of the through hole, thereby fixing the screw. It is characterized by being screwed into the part.

  In the present invention, the support part and the fixed part are connected by screws, and the detection means is held in the storage part.

In the present invention, by positioning the detection means on the non-guide surface side facing the guide surface of the casing, a small amount of grain collides with the detection means compared to the guide surface side, and the grain is a grain tank. Deposits on average within. Further, by positioning the detection means on the top side, it is possible to prevent the detection means from being buried in the grain before the grain tank is full. Since the amount of grain that collides with the detection means is small, the amount of wear of the detection means can be reduced, and the sensing capacity of the detection means can be reduced.
When the detection means is arranged on the guide surface side, a large amount of grains colliding with the detection means pile up near the opening, and before the storage part is full, the input of the grains must be stopped, the work efficiency Decreases. A small amount of grain is introduced on the non-guide surface side, and by arranging the detection means on the non-guide surface side, it is possible to prevent the grain from being concentrated in the vicinity of the opening. Further, on the non-guide surface side, the detection means can be arranged at a position according to the specification of the combine.

  In the present invention, since the grains are transported along the outer periphery of the screw conveyor, on the basis of a line intersecting the guide surface or an extended surface of the guide surface at a predetermined angle, the region is separated from the guide surface. By arrange | positioning a detection means, it can avoid reliably that a grain collides with a detection means continuously.

  In the present invention, by arranging the detection means on the non-guide surface side, the difference between the detection value in the period when the grain should collide with the detection means and the detection value outside the period becomes clear, A steady-state deviation can be removed from the detected value in the period based on the detected value outside the period. Therefore, it is possible to reliably improve the calculation accuracy of the grain amount. When the detection means is arranged on the guide surface side, the grain collides with the detection means over the entire period, so that the steady deviation cannot be removed.

  In the present invention, the collision unit faces the opening, so that the detection means can reliably detect even a small amount of grain and improve the detection accuracy.

  In the present invention, by configuring the collision portion with an elastic member, the wear resistance against the collision of the grains is improved, and the number of exchanges can be reduced. Moreover, the damage of the grain at the time of a collision can be prevented and the quality of the harvested grain can be improved.

  In the present invention, the support portion and the fixing portion are connected with screws, and the detection means is stably held in the storage portion. The support portion is made of metal, and the stability of the detection means can be improved as compared with the case where the screw is locked to the collision portion constituted by the elastic member. In addition, when the collision part is replaced, it can be replaced simply by removing and attaching the screw while leaving the fixing part having the harness, the circuit board, etc., and the time and cost required for maintenance management can be reduced.

1 is an external perspective view of a combine according to Embodiment 1. FIG. It is side surface sectional drawing which outlines the internal structure of a threshing apparatus. It is a disassembled perspective view which outlines the structure of a casing vicinity. It is a plane sectional view showing a grain tank roughly. It is a longitudinal cross-sectional view which outlines a grain tank. It is a longitudinal cross-sectional view which shows a spout sensor schematically. It is a transmission mechanism figure which shows the transmission path of the driving force of an engine schematically. It is a block diagram which shows the structure of a control part. It is a table which shows the relationship between the engine speed and the coefficient β. It is an example of the graph which shows the relationship between the detection value of a spout sensor located in a 2nd area | region, and the detection value of a pickup sensor. It is an example of the graph which shows the relationship between the detected value of the spout sensor located in a 1st area | region, and the detected value of a pickup sensor. It is a flowchart which shows the grain amount calculation process by CPU. It is a flowchart which shows the correction value calculation process by CPU. It is a plane sectional view showing the grain tank concerning other examples of L2. It is an internal side block diagram which expands and schematically shows the bucket type elevator and grain tank of the combine which concerns on Embodiment 2. FIG.

(Embodiment 1)
Hereinafter, the present invention will be described in detail based on the drawings showing the combine according to the first embodiment. FIG. 1 is an external perspective view of a combine.

  In the figure, reference numeral 1 denotes a traveling crawler, and an airframe 9 is provided above the traveling crawler 1. A threshing device 2 is provided on the body 9. On the front side of the threshing device 2, there is provided a cutting unit 3 including a weed plate 3a for discriminating between a harvested cereal and a non-reached cereal, a cutting blade 3b for reaping the cereal, and a raising device 3c for causing the cereal. It is. On the right side of the threshing device 2 is provided a grain tank 4 for storing the grain, and on the left part of the threshing device 2 is provided a long feed chain 5 before and after conveying cereals. On the upper side of the feed chain 5, there is provided a clamping member 6 for clamping the cereal cake, and the clamping member 6 and the feed chain 5 face each other. In the vicinity of the front end portion of the feed chain 5, an upper transport device 7 is disposed. The grain tank 4 is provided with a cylindrical discharge auger 4 a for discharging the grain from the grain tank 4, and a cabin 8 is provided on the front side of the grain tank 4.

  The vehicle body 9 travels by driving the travel crawler 1. As the machine body 9 travels, the cereals are taken into the mowing unit 3 and mowed. The harvested corn straw is conveyed to the threshing device 2 through the upper conveying device 7, the feed chain 5 and the clamping member 6, and threshed in the threshing device 2.

  2 is a side sectional view schematically showing the internal configuration of the threshing apparatus 2, FIG. 3 is an exploded perspective view schematically showing the configuration in the vicinity of the casing 140, FIG. 4 is a plan sectional view schematically showing the grain tank 4, and FIG. FIG. 2 is a longitudinal sectional view schematically showing a grain tank 4. In FIG.4 and FIG.5, the broken line arrow shows the moving direction of a grain, and a round shape shows a grain.

  As shown in FIG. 2, a handling room 10 for threshing cereals is provided at the front upper part of the threshing device 2. A cylindrical handling cylinder 11 whose axial direction is the longitudinal direction is mounted in the handling chamber 10, and the handling cylinder 11 is rotatable about the axis. A large number of teeth 12, 12,... 12 are arranged in a spiral on the peripheral surface of the barrel 11. On the lower side of the handling cylinder 11, a crimp net 15 is disposed for coping with the handling teeth 12, 12,. The said handling cylinder 11 rotates with the driving force of the engine 40 mentioned later, and threshs a cereal.

  Four dust feed valves 10 a, 10 a, 10 a, 10 a are juxtaposed in the front-rear direction on the upper wall of the handling chamber 10, and the dust feed valves control the amount of straw and grains sent to the rear part of the handling chamber 10. Adjust.

  A processing chamber 13 is connected to the rear of the handling chamber 10. A cylindrical processing cylinder 13b whose axial direction is the longitudinal direction is mounted in the processing chamber 13, and the processing cylinder 13b is rotatable around the axis. A large number of teeth 13c, 13c,..., 13c are arranged in a spiral on the peripheral surface of the processing cylinder 13b. A treatment net 13d that disperses the ridges in cooperation with the teeth 13c, 13c,..., 13c is disposed below the treatment cylinder 13b. The processing cylinder 13b is rotated by the driving force of the engine 40, and performs a process of separating the grain from the straw and the grain delivered from the handling chamber 10. A discharge port 13 e is opened below the rear end of the processing chamber 13.

  Four processing cylinder valves 13 a, 13 a, 13 a, 13 a are juxtaposed along the front-rear direction on the upper wall of the processing chamber 13, and the processing cylinder valves 13 a, 13 a, 13 a, 13 a go to the rear part of the processing chamber 13. Adjust the amount of straw and grains to be delivered.

  Below the crimp net 15 is provided a swinging sorter 16 for sorting grains and straws. The rocking sorter 16 is provided on the back side of the rocking sorter 17 for making the grains and straws uniform and selecting the specific gravity, and for rough sorting of the grains and straws. A chaff sheave 18 to be performed, and a stroller rack 19 provided on the rear side of the chaff sheave 18 for dropping the grains mixed in the straw. The Strollac 19 has a plurality of through holes (not shown). A swing arm 21 is connected to the front portion of the swing sorter 17. The swing arm 21 is configured to swing back and forth. By the swinging of the swinging arm 21, the swing sorting device 16 swings, and selection of straw and grains is performed.

  The swing sorting device 16 is provided below the chaff sheave 18 and further includes a grain sheave 20 that performs fine sorting of grains and straw. Below the grain sheave 20, a first grain plate 22 inclined with the front facing down is provided, and on the front side of the first grain plate 22, a first screw conveyor 23 is provided. The first screw conveyor 23 takes in the grain that has slid down the first grain plate 22 and feeds it to the grain tank 4.

  As shown in FIGS. 3 and 4, a rectangular blade plate 23 b is provided on the shaft portion 23 c at the upper end of the screw conveyor 23. The vane plate 23b protrudes in the radial direction about the shaft portion 23c. The vane plate 23b rotates in synchronism with the screw conveyor 23.

The shaft portion 23 c and the blade plate 23 b are accommodated in the casing 140. The casing 140 includes a U-shaped side surface 141 in plan view covering the periphery of the shaft portion 23c and the blade plate 23b. The side surface 141 faces the side surface of the grain tank 4 with the shaft portion 23c and the blade plate 23b interposed therebetween.
One end of the side surface 141 forms a guide surface 141a for guiding the grain. The other end of the side surface 141 forms a non-guide surface 141b that faces the guide surface 141a. The guide surface 141a is inclined at an acute angle with respect to the side surface of the grain tank 4, and extends in a direction opposite to the non-guide surface 141b. The dimension between the first screw conveyor 23 and the guide surface 141a is larger than the dimension between the first screw conveyor 23 and the non-guide surface 141b. An upper side surface 142 and a lower side surface 143 are provided above and below the side surface 141. The side facing the side surface 141 is open, and a flange 231 is provided.

  A through hole 142 a is provided at the center of the upper side surface 142. A plurality of bolts 142b, 142b,..., 142b are erected around the through hole 142a. A through hole 143 a is provided at the center of the lower side surface 143. Around the through hole 143a, a plurality of boss portions 143b, 143b,..., 143b protruding downward are provided. The boss portion 143b has a bottomed cylindrical shape with the upper side as the bottom surface, and has a thread groove formed on the inner peripheral surface.

  An outer cylinder 230 that covers the periphery of the screw conveyor 23 is fitted in the through hole 143a. A flange 231 is provided at the upper end of the outer cylinder 230. The flange 231 is provided with a plurality of through holes 231a, 231a, ..., 231a corresponding to the boss portions 143b. A bolt 230 is inserted from below the through hole 231a and screwed into the boss portion 143b.

  On the upper side of the upper side surface 142, a plate-like bearing receiver 232 that covers the through hole 142a is provided. A fitting hole 232d penetrating in the vertical direction in which the two bearings 233 and 233 are fitted is provided at the center of the bearing receiver 232. In the bearing receiver 232, through holes 232a, 232a,... 232a corresponding to the bolts 142b are provided around the fitting hole 232d.

  Bearings 233 and 233 are fitted in the fitting hole 232d side by side from above. A bearing cover 234 that closes the fitting hole 232d is provided on the upper side of the bearing 233. A retaining ring 235 for fixing the bearing cover 234 to the bearing receiver 232 is provided above the bearing cover 234. The upper end of the shaft portion 23 c of the first screw conveyor 23 is fitted to the bearings 233 and 233 from below.

  Each bolt 142b is inserted into each through hole 232a from below. A nut 232c is screwed to each bolt 142b via a spring washer 232b.

  A spout 4 b (opening) is provided on the side surface of the grain tank 4. The flange 231 is fixed to the peripheral edge portion of the throwing opening 4b through the seal member 150. The slat 23b faces the spout 4b.

  As shown in FIG. 5, a push switch 4c is provided in the vicinity of the spout 4b and below the spout 4b. When the grain tank 4 becomes full, the push switch 4c is pressed by the stored grain and outputs a signal to the control unit 100 described later. In addition, in FIG. 5, a dashed-dotted line shows the upper surface position of the grain at the time of fullness, and a broken line shows the up-and-down position of the lower edge part of the spout 4b.

  As shown in FIG. 4, L1 is a line located on the guide surface 141a and the surface which extended the guide surface 141a. L2 is the outermost tangent line of the screw conveyor 23 that intersects L1 at an angle of 30 degrees between the shaft portion 23c and the guide surface 141a. In the grain tank 4, a region sandwiched between L1 and L2 is defined as a first region (see the solid line hatching in FIG. 4), and a region opposite to the first region with respect to L2 is defined as a second region (FIG. 4).

  As shown in FIG. 4, a spout sensor 300 that detects the impact value of the grain that is thrown into the grain tank 4 from the spout 4 b is disposed in the second region. As shown in FIG. 5, a support member 310 is suspended from the top surface of the grain tank 4, and the spout sensor 300 is fixed to the support member 310. The spout sensor 300 is disposed above the lower edge of the spout 4b. Moreover, when the grain tank 4 becomes full, it is located above the upper surface of the grain stored in the grain tank 4. In other words, the spout sensor 300 is arranged at the vertical position and the depth position that are not buried in the grain when full.

  FIG. 6 is a longitudinal sectional view schematically showing the spout sensor 300. The spout sensor 300 includes a sensor main body 301 (fixed portion) including a strain gauge and a circuit board. The sensor main body 301 has a housing, and a strain gauge, a circuit board, and the like are accommodated in the housing. The housing rear surface of the sensor main body 301 is fixed to the support member 310 with a plurality of screws 311. The sensor body 301 may be configured to be able to detect the impact value of the collided grain. For example, a piezoelectric element may be provided instead of the strain gauge.

  A steel plate 302 (support portion) is provided on the front surface of the sensor main body 301. The steel plate 302 is provided with a collision plate 303 (collision part) on which the grains collide. As shown in FIG. 4, the spout sensor 300 has the collision plate 303 facing the spout 4b.

  The collision plate 303 is made of an elastic member, and is made of polyurethane, rubber, elastomer, or the like. The steel plate 302 is harder than the collision plate 303 and may be made of other metals such as aluminum or copper, or a resin such as polyethylene or vinyl chloride. By configuring the collision plate 303 with an elastic member, the wear resistance against the collision of the grains is improved. It also prevents grain damage during a collision.

  The impingement plate 303 is provided with a plurality of through holes 303 a that receive the heads of the screws 304. The steel plate 302 is provided with a plurality of through holes 302a corresponding to the accommodation holes 303a. The through hole 302a has a smaller diameter than the accommodation hole 303a. The diameter of the screw portion of the screw 304 is slightly smaller than the diameter of the accommodation hole 303a. The diameter of the head of the screw 304 is larger than the diameter of the through hole 302a and smaller than the accommodation hole 303a.

  A plurality of screws 304 are inserted into the accommodation holes 303 a and the through holes 302 a and screwed to the front surface of the housing of the sensor main body 301. The head of the screw 304 is locked to the peripheral portion of the through hole 302a. A steel plate 302 is sandwiched between the head of the screw 304 and the sensor body 301. The steel plate 302 is made of metal, and the stability of the spout sensor 300 is improved as compared with the case where a screw is locked to the collision plate 303 formed of an elastic member.

  The grain that has fallen from the grain sieve 20 onto the first grain plate 22 slides down toward the first screw conveyor 23. The dropped grain is conveyed by the screw conveyor 23 first. Centrifugal force acts on the grain, and the grain ascends along the outer periphery of the screw conveyor 23 first. As shown by a solid line arrow in FIG. 4, the blade plate 23b rotates from the non-guide surface 141b side toward the guide surface 141a side (rotates counterclockwise in FIG. 4). The slat 23b pushes the grain toward the spout 4b.

  In FIG. 4, most of the extruded grain moves along the guide surface 141 a and spreads horizontally in the first region in the grain tank 4 as indicated by the broken arrow and the circle near the guide surface 141 a. It is put in a continuous belt shape. In FIG. 4, the remaining grains are discretely charged into the second region in the grain tank 4 as indicated by the dashed arrows and the circles near the first screw conveyor 23.

  In the first region, the grain that moves along the guide surface 141a, the grain that has collided with the guide surface 141a, and bounced back are continuously put into the grain tank 4. In addition, since it contacts the guide surface 141a, a grain is thrown in and thrown in. On the other hand, in the second region, the grain is directly put into the grain tank 4 from the blade 23b. Therefore, the grain does not come into contact with the guide surface 141a unlike the grain thrown into the first region, so that the grain is hardly decelerated and is thrown at a high speed in a discrete state.

  Moreover, the upward force by the first screw conveyor 23 acts on the grain. As shown by the broken line arrow in FIG. 5, the grain moves obliquely upward by the combination of the upward force and the lateral force from the blade 23b.

  Since the spout sensor 300 is arranged in the second region, a small amount of discrete grains instantaneously collide with the spout sensor 300. In addition, when the spout sensor 300 is arrange | positioned in the 1st area | region, the grain continuously spread horizontally collides with the spout sensor 300. FIG.

  The grain is intermittently thrown into the grain tank 4 from the spout 4b by the rotation of the blades 23b. When the input grain collides with the spout sensor 300, a voltage is output from the strain gauge, and the amount of the grain is calculated based on the output voltage.

At the rear of the first grain plate 22, an inclined plate 24 inclined downward is provided continuously. A second grain plate 25 inclined downward toward the front is connected to the rear end of the inclined plate 24. A second screw conveyor 26 is provided on the upper side of the connecting portion between the second grain plate 25 and the inclined plate 24 to convey straw and grains.
Falling objects that have fallen onto the inclined plate 24 or the second grain plate 25 from the through holes of the Strollac 19 slide down toward the second screw conveyor 26. The fallen fallen object is conveyed to the processing rotor 14 provided on the left side of the handling cylinder 11 by the second screw conveyor 26 and is threshed by the processing rotor 14.

  A tang 27 that performs a wind-up operation is provided in front of the first screw conveyor 23 and below the swing sorter 17. The wind generated by the wind-up operation of the carp 27 travels backward. A rectifying plate 28 for sending the wind upward is disposed between the tang 27 and the first screw conveyor 23.

  A passage plate 36 is connected to the rear end portion of the second grain plate 25. A lower suction cover 30 is provided above the passage plate 36. Between the lower suction cover 30 and the passage plate 36 is an exhaust passage 37 through which dust is discharged.

  An upper suction cover 31 is provided above the lower suction cover 30. Between the upper suction cover 31 and the lower suction cover 30, an axial fan 32 for sucking and discharging soot is disposed. A dust exhaust port 33 is provided behind the axial flow fan 32. The air flow generated by the operation of the tang 27 is rectified by the rectifying plates 28 and 28, then passes through the swing sorting device 16 and reaches the dust outlet 33 and the exhaust passage 37.

  Discharge amount sensors 34 and 34 each including a piezoelectric element are disposed in the dust outlet 33 and the exhaust passage 37, respectively. Grains are discharged from the dust outlet 33 and the exhaust passage 37 and come into contact with the discharge sensors 34 and 34. At this time, voltage signals are output from the piezoelectric elements of the discharge amount sensors 34, 34, and the amount of grain discharged from the dust outlet 33 and the exhaust passage 37 is detected.

  On the upper side of the upper suction cover 31, below the processing chamber 13, there is provided a sluice 35 that is inclined with the front facing downward. Exhaust discharged from the discharge port 13e of the processing chamber 13 slides down the downflow basin 35 and falls onto the Strollac 19.

  The driving of the traveling crawler 1, the cutting operation of the cutting unit 3, the rotation of the handling cylinder 11, the rotation of the processing cylinder 13 b, the swinging of the swing sorting device 16, the rotating operation of the first screw conveyor 23, etc. The driving force is used. FIG. 7 is a transmission mechanism diagram schematically showing the transmission path of the driving force of the engine 40.

As shown in FIG. 7, the engine 40 is connected to a traveling mission 42 via an HST (Hydro Static Transmission) 41. In the vicinity of the output shaft of the engine 40, an engine speed sensor 40a for detecting the engine speed is provided. The engine speed sensor 40a is a magnetic sensor having a Hall element or the like, and detects the speed by passing through a magnetic material of the output shaft.

  The HST 41 has a hydraulic pump (not shown), a mechanism (not shown) that adjusts the flow rate of hydraulic oil supplied to the hydraulic pump and the pressure of the hydraulic pump, and a transmission circuit 41a that controls the mechanism. ing.

  The traveling mission 42 has a gear (not shown) that transmits driving force to the traveling crawler 1. The traveling mission 42 is provided with a vehicle speed sensor 43 having a hall element. The vehicle speed sensor 43 detects the rotational speed of the gear and outputs a signal indicating the vehicle speed of the airframe corresponding to the rotational speed of the gear.

  The engine 40 is connected to the handling cylinder 11 and the processing cylinder 13b through an electromagnetic threshing clutch 44, and is also connected to a transmission mechanism 50. The transmission mechanism 50 is connected to the first screw conveyor 23. A pickup sensor 51 is provided in the vicinity of the shaft connecting the transmission mechanism 50 and the first screw conveyor 23. The pickup sensor 51 is a magnetic sensor having a Hall element and the like, and detects the number of rotations of the screw conveyor 23 by the passage of the magnetic material of the shaft.

  The engine 40 is connected to an eccentric crank 45 through a threshing clutch 44. The eccentric crank 45 is connected to the swing arm 21. As the eccentric crank 45 is driven, the swing sorting device 16 swings. The engine 40 is connected to the tang 27 through a threshing clutch 44. The engine 40 is connected to the reaping portion 3 via a threshing clutch 44 and an electromagnetic reaping clutch 46.

  The driving force of the engine 40 is transmitted to the traveling crawler 1 via the traveling mission 42, and the aircraft travels. Further, the driving force of the engine 40 is transmitted to the cutting unit 3 via the cutting clutch 46, and the cereal is harvested by the cutting unit 3.

  The driving force of the engine 40 is transmitted to the handling cylinder 11 via the threshing clutch 44, and the cereal is threshed by the handling cylinder 11. Further, the driving force of the engine 40 is transmitted to the processing cylinder 13b via the threshing clutch 44. The processing cylinder 13b separates the grain from the processed product threshed by the handling cylinder 11.

  In addition, the driving force of the engine 40 is transmitted to the swing sorting device 16 via the threshing clutch 44 and the eccentric crank 45, and discharged from the straw and grains leaked from the handling cylinder 11 and the discharge port 13e of the processing chamber 13. Sorting of the finished straw and grains is performed. Further, the driving force of the engine 40 is transmitted to the Kara 27 through the threshing clutch 44, and the soot selected by the swing sorting device 16 is discharged from the dust outlet 33 and the exhaust passage 37 by the wind action of the Kara 27. The

  Based on outputs from the spout sensor 300, the engine speed sensor 40a, and the pickup sensor 51, a control unit that calculates the amount of grain stored in the grain tank 4 is mounted on the combine. FIG. 8 is a block diagram showing the configuration of the control unit 100, and FIG. 9 is a table showing the relationship between the rotational speed of the engine 40 and the coefficient β.

  The control unit 100 includes a CPU (Central Processing Unit) 100a, a ROM (Read Only Memory) 100b, a RAM (Random Access Memory) 100c, and an EEPROM (Electrically Erasable and Programmable Read Only Memory) 100d which are connected to each other via an internal bus 100g. ing. The CPU 100a reads the control program stored in the ROM 100b into the RAM 100c, and executes necessary control such as operation control of the dust feeding valve 10a and the processing cylinder valve 13a according to the control program. The CPU 100a has a built-in timer.

The EEPROM 100d stores an LUT (Look Up Table) 100h.
The LUT 100h stores a table showing the relationship between the engine speed and the coefficient β (see FIG. 9). The table includes an “engine speed” column and a “coefficient β” column, and each row of each column stores an engine speed and a value of a coefficient β corresponding to the engine speed (β1 to β6). Has been. The engine speed corresponds to the number of rotations of the screw conveyor 23.

  A correction variable X is set in the EEPROM 100d, and a value is stored in the correction variable X as necessary. Further, a threshold value α for determining whether or not the detection value of the spout sensor 300 is included in the calculation target of the grain amount is set.

  The control unit 100 outputs a disconnection signal to the reaping clutch 46 and the threshing clutch 44 through the output interface 100f. Further, the control unit 100 outputs a display signal indicating that a predetermined video is displayed on the display unit 83 via the output interface 100f. Further, the control unit 100 outputs a lighting or extinguishing signal to the warning lamp 84 via the output interface 100f.

  The output signals of the cutting switch 80, the index setting switch 81, the operation switch 82, the spout sensor 300, the push switch 4c, the pickup sensor 51, and the engine speed sensor 40a are input to the control unit 100 via the input interface 100e. Yes.

  In addition, a dashboard panel (not shown) is provided in the cabin 8, and a cutting switch 80, an index setting switch 81, a plurality of operation switches 82 and a threshing switch 85 are provided on the dashboard panel, and a liquid crystal panel is provided. A display portion 83 is provided. A warning lamp 84 is provided in the cabin 8. In response to the on / off of the cutting switch 80, the cutting clutch 46 and the threshing clutch 44 are connected. Further, the threshing clutch 44 is disconnected in response to the on / off of the threshing switch 85.

  The CPU 100a integrates the detection values related to the output signal of the spout sensor 300, and determines whether or not to include the detected value in comparison with the threshold value α. The detection value included in the integration target is stored in the EEPROM 100d in synchronization with the detection value related to the output signal of the pickup sensor 51. FIG. 10 is an example of a graph showing the relationship between the detection value of the spout sensor 300 located in the second region and the detection value of the pickup sensor 51. FIG. 10A is a graph showing the relationship between time and the detection value of the spout sensor 300. The detection value of the spout sensor 300 indicates the amount of distortion due to the collision of the grain, and is a moving average value at a predetermined sampling number. FIG. 10B is a graph showing the relationship between time and the detection value of the pickup sensor 51. The detection value of the pickup sensor 51 indicates the rotation start time and rotation end time in one rotation of the blade plate 23b. In the following description, the subscript of the period P in FIG. 10 is omitted as appropriate.

  The detection value of the pickup sensor 51 is detected as a pulse wave, and the interval between the pulse waves corresponds to the cycle of one rotation of the screw conveyor 23, that is, the cycle P of one rotation of the blade plate 23b. The CPU 100a takes in the detection value of the spout sensor 300 at a predetermined sampling period (for example, 100 [ms]) and stores it in the EEPROM 100d. The CPU 100a creates a time stamp each time a pulse wave is input from the pickup sensor 51, and associates the time stamp with the detection value input from the spout sensor 300 when the pulse wave is input. To remember.

  In FIG. 10, when the grain is put into the grain tank 4 by the blade 23b, the detection value by the collision of the grain is input from the spout sensor 300 to the CPU 100a between P / 4 to 3P / 4. The The detection value input from 0 to P / 4 and 3P / 4 to P from the spout sensor 300 to the CPU 100a is a detection value when the grain does not collide with the spout sensor 300. The grain collides with the spout sensor 300 located in the second region instantaneously between P / 4 to 3P / 4, and the grain collides between 0 to P / 4 and 3P / 4 to P. do not do.

  In FIG. 10A, the threshold value α corresponds to a detection value detected by the spout sensor 300 due to disturbances such as temperature characteristics of the spout sensor 300, wind pressure by the blades 23b, and inclination of the airframe 9. When the grain is not put into the grain tank 4 by the blade 23b, ideally, the detected value due to the collision of the grain is input from the spout sensor 300 to the CPU 100a during P / 4 to 3P / 4. Not. However, actually, a detection value (threshold value α) due to disturbance (for example, wind pressure by the blade 23b) is input from the spout sensor 300 to the CPU 100a.

The CPU 100a compares the detection value input from the spout sensor 300 during the period P / 4 to 3P / 4 with the threshold value α. When the detected value includes a value exceeding the threshold value α, the CPU 100a determines that the detected value input between P / 4 to 3P / 4 is to be integrated (period P in FIG. 10A). ₁ , areas of broken line hatched portions at P ₂ and P ₅ ). The value to be integrated corresponds to the impulse by the collision of the grain with the spout sensor 300.

When the detected value does not include a value that exceeds the threshold value α, the CPU 100a excludes the detected value input between P / 4 to 3P / 4 from the targets to be integrated (in FIG. 10A, the period P). ₃ and P ₄ parts).

  On the other hand, a value obtained by integrating the detection values of the spout sensor 300 between 0P / 4 and 3P / 4P (area of the hatched portion in FIG. 10A) corresponds to a steady deviation. The steady deviation is caused by vibration of the engine 40, vibration propagated to the spout sensor 300 while traveling on a rough field, characteristics of the spout sensor 300, and the like.

  The CPU 100a performs necessary processing on a value obtained by integrating the detection values of the spout sensor 300 between 0-P / 4 and 3P / 4-P in a predetermined cycle (for example, 1 [s]), and accesses the EEPROM 100d. And stored in the correction variable X.

  The CPU 100a accesses the EEPROM 100d, refers to the time stamp, and integrates the detection values of the spout sensor 300 between P / 4 and 3P / 4. Then, the steady deviation included in the integrated value is removed using the value stored in the correction variable X. For example, the value stored in the correction variable X is subtracted from the integrated value.

  The CPU 100a stores the correction value D from which the steady deviation is removed in the RAM 100c. And the coefficient (beta) is applied to the correction value D, and the grain quantity stored in the grain tank 4 is calculated | required.

  When the spout sensor 300 is arranged in the second region, correction for removing the steady deviation can be executed. When the spout sensor 300 is arranged in the first region, it is impossible to execute correction for removing the steady deviation. The reason will be described below.

  FIG. 11 is an example of a graph showing the relationship between the detection value of the spout sensor 300 located in the first region and the detection value of the pickup sensor 51. FIG. 11A is a graph showing the relationship between time and the detection value of the spout sensor 300. The detection value of the spout sensor 300 indicates the amount of distortion due to the collision of the grain, and is a moving average value at a predetermined sampling number. The solid line in FIG. 11A indicates the detection value of the spout sensor 300 located in the first region. A two-dot chain line indicates a detection value of the spout sensor 300 located in the second region. FIG. 11B is a graph showing the relationship between time and the detection value of the pickup sensor 51. The detection value of the pickup sensor 51 indicates the rotation start time and rotation end time in one rotation of the blade plate 23b. In the following description, the subscript of the period P in FIG. 11 is omitted as appropriate.

  As shown in FIG. 4, in the first region in the grain tank 4, a band-shaped grain group that is continuously spread out is put. Therefore, when the spout sensor 300 is arranged in the first region, the grain collides with the spout sensor 300 continuously during the period P. In other words, the grains collide between 0-P / 4 and 3P / 4-P, which should not have collided with the spout sensor 300.

As shown in FIG. 11, in each period P ₁ , P ₂ , and P ₅ in which the grain is put into the grain tank 4, the detected value between 0 to P / 4 and 3P / 4 to P is 2 It is larger than the detection value (detection value of the spout sensor 300 located in the second region) indicated by the dotted line. This is because the grain collided between 0-P / 4 and 3P / 4-P, which should not have collided with the spout sensor 300.

  In order to use the detected value between 0-P / 4 and 3P / 4-P for correction to remove the steady deviation, the grain is spouted between 0-P / 4 and 3P / 4-P. It should be considered that the sensor 300 does not collide or is not colliding. However, between 0-P / 4 and 3P / 4-P, the grain continuously collides with the spout sensor 300, and the detected value between 0-P / 4 and 3P / 4-P is It cannot be used for correction to remove steady-state deviation.

  Next, the grain amount calculation processing by the CPU 100a will be described. FIG. 12 is a flowchart showing the grain amount calculation processing by the CPU 100a.

  The CPU 100a takes in a signal from the cutting switch 80, determines whether or not the cutting switch 80 is turned on (step S1), and waits until the cutting switch 80 is turned on (step S1: NO). When the cutting switch 80 is on (step S1: YES), the CPU 100a takes in a signal from the engine speed sensor 40a (step S2). The CPU 100a accesses the EEPROM 100d and refers to the LUT 100h (step S3), and determines a coefficient β (β1 to β6) corresponding to the engine speed indicated by the signal taken from the engine speed sensor 40a (step S4).

  And CPU100a takes in a signal from pickup sensor 51 and spout sensor 300 (Step S5), and accumulates impulses between P / 4-3P / 4 (Step S6). At this time, the CPU 100a accesses the EEPROM 100d, refers to the time stamp, and integrates the detection values of the spout sensor 300 between P / 4 and 3P / 4. Note that the detection values are sequentially input from the spout sensor 300 to the control unit 100 at a constant sampling period, and the CPU 100a refers to the time stamp to input between P / 4 to 3P / 4. The detected value can be recognized.

  Next, the CPU 100a determines whether or not the detection value input between P / 4 to 3P / 4 includes a detection value that exceeds the threshold value α (step S7). When the detected value exceeding the threshold value α is not included (step S7: NO), the CPU 100a advances the process to step S12.

  When the detected value exceeding the threshold value α is included (step S7: YES), the CPU 100a accesses the EEPROM 100d, refers to the correction variable X (step S8), and corrects the calculated impulse with the correction variable X ( Step S9), a correction value D is obtained. For example, the CPU 100a subtracts the value stored in the correction variable X from the calculated impulse. Note that subtraction is an example of correction, and multiplication or division may be performed based on a value stored in the correction variable X.

  Then, the CPU 100a applies the coefficient β to the correction value D (Step S10). For example, the correction value D is multiplied or added by the coefficient β. The multiplication or addition of the coefficient β is an example of application of the coefficient β, and is not limited to this. Next, the CPU 100a integrates the correction value D after applying the coefficient β (step S11). Note that the integrated value in step S <b> 11 corresponds to the amount of grain stored in the grain tank 4. Then, the CPU 100a takes in a signal from the cutting switch 80 and determines whether or not the cutting switch 80 is off (step S12). When the cutting switch 80 is not off (step S12: NO), that is, when the cutting switch 80 is on, the CPU 100a returns the process to step S2. When the cutting switch 80 is off (step S12: YES), the CPU 100a ends the process. In addition, the grain amount calculation process mentioned above can be performed as a real-time process performed within the period P.

  The CPU 100a waits until the time until the grain processed in the handling cylinder 11 is carried out to the grain tank 4 after the cutting switch 80 is turned off after step S10, and the amount of grain The arithmetic processing may be terminated. The determination in step S7 may be performed after step S5.

  Next, correction value calculation processing by the CPU 100a will be described. FIG. 13 is a flowchart showing correction value calculation processing by the CPU 100a.

  The CPU 100a takes in a signal from the cutting switch 80, determines whether the cutting switch 80 is turned on (step S21), and waits until the cutting switch 80 is turned on (step S21: NO). When the cutting switch 80 is on (step S21: YES), signals are acquired from the pickup sensor 51 and the spout sensor 300 (step S22), and the impulses between 0 to P / 4 and 3P / 4 to P are integrated. (Step S23). At this time, the CPU 100a accesses the EEPROM 100d, refers to the time stamp, and integrates the detection values of the spout sensor 300 between 0-P / 4 and 3P / 4-P. The detection values are sequentially input from the spout sensor 300 to the control unit 100 at a constant sampling period, and the CPU 100a refers to the time stamp to indicate a value between 0-P / 4 and 3P / 4-P. Can be recognized.

  Then, the CPU 100a performs a predetermined process on the integrated value (step S24). For example, a predetermined function set in advance in the EEPROM 100 d is applied in accordance with an input from the operation switch 82 or by multiplying a coefficient considering the variation rate. Next, the CPU 100a stores the processed value in the correction variable X (step S25).

  The CPU 100a starts to elapse with a built-in timer and waits for a predetermined time, for example, 1 [s] (step S26: NO). When the predetermined time has elapsed (step S26: YES), the CPU 100a takes in a signal from the cutting switch 80 and determines whether or not the cutting switch 80 is off (step S27). When the cutting switch 80 is on (step S27: NO), the CPU 100a resets the timer (step S28) and returns the process to step S22. When the cutting switch 80 is off (step S27: YES), the CPU 100a ends the process.

In the combine according to the first embodiment, by positioning the spout sensor 300 on the non-guide surface 141b side facing the guide surface 141a of the casing 140, a small amount of grain is thrown compared to the guide surface 141a side. The grains collide with the mouth sensor 300 and the grains are deposited in the grain tank 4 on the average. Moreover, by positioning the spout sensor 300 on the top surface side of the spout 4b, it is possible to prevent the spout sensor 300 from being buried in the grain before the grain tank 4 is full. Since the amount of grains that collide with the spout sensor 300 is small, the amount of wear of the spout sensor 300 can be reduced, and the sensing capacity of the spout sensor 300 can be reduced.
When the spout sensor 300 is arranged in the first region, a large amount of grains colliding with the spout sensor 300 pile up in the vicinity of the spout 4b, and before the grain tank 4 is full, the grain is charged. It must be stopped and work efficiency is reduced. A small amount of grain is introduced on the non-guide surface 141b side, and by disposing the spout sensor 300 on the non-guide surface 141b side, it is possible to prevent grains from being concentrated in the vicinity of the spout 4b. be able to. In addition, on the non-guide surface 141b side, the spout sensor 300 can be disposed at a position according to the combine specification.

  In addition, since the grain is conveyed along the outer periphery of the first screw conveyor 23, a large amount of grain can be obtained by arranging the spout sensor 300 in the second region separated from the guide surface 141a with reference to L2. It is possible to reliably avoid the collision with the spout sensor 300 continuously.

  In addition, by arranging the spout sensor 300 on the non-guide surface 141b side (second region), the grains collide with the spout sensor 300 based on the detection values between 0-P / 4 and 3P / 4-P. It can be adopted as a detection value that has not been performed. Therefore, from P / 4 to 3P / 4 (period when the grain collides with the spout sensor 300), it is steady based on the detection values between 0 to P / 4 and 3P / 4 to P. The deviation can be removed, and the calculation accuracy of the grain amount can be reliably improved. When the spout sensor 300 is arranged on the guide surface 141a side (first region), since the grain collides with the spout sensor 300 over the entire period of one cycle, the steady deviation cannot be removed.

  Further, since the collision plate 303 faces the spout 4b, the spout sensor 300 can reliably detect even a small amount of grains and improve the detection accuracy.

  Moreover, by comprising the collision board 303 with an elastic member, the abrasion resistance with respect to the collision of a grain improves, and the frequency | count of replacement | exchange can be reduced. Moreover, the damage of the grain at the time of a collision can be prevented and the quality of the harvested grain can be improved.

  Further, the steel plate 302 and the sensor main body 301 are connected by a screw 304, and the spout sensor 300 is stably held in the grain tank 4. The steel plate 302 is made of metal, and the stability of the spout sensor 300 can be improved as compared with the case where the screw 304 is locked to the collision plate 303 formed of an elastic member. Further, when replacing the collision plate 303, it is possible to replace the collision plate 303 by simply removing and attaching the screw 304 while leaving the sensor body 301 having the harness, the circuit board, etc., and reducing the time and cost required for maintenance management. Can do.

  Further, the steel plate 302 and the sensor main body 301 are connected by a screw 304, and the spout sensor 300 is stably held in the grain tank 4. The steel plate 302 is made of metal, and stability can be improved as compared with the case where the screw 304 is locked to the collision plate 303 formed of an elastic member.

  In FIG. 4, the angle formed by L1 and L2 is 30 degrees, but the angle formed by L1 and L2 is not limited to this. L2 should just be a line which distinguishes the 1st area | region where a grain collides with the spout sensor 300 continuously, and the 2nd area | region which collides instantaneously, The angle which L1 and L2 make is suitably according to design. Selected.

  FIG. 14 is a plan sectional view schematically showing a grain tank 4 according to another example of L2. As shown in FIG. 14, L2 is located at a position 50 mm away from the connection portion between the guide surface 141a and the spout 4b, closest to the screw conveyor 23 side (non-guide surface 141b side). L2 intersects L1 at a predetermined angle. Even in this case, the grains momentarily collide with the spout sensor 300 located in the second region.

(Embodiment 2)
Hereinafter, the present invention will be described in detail with reference to the drawings showing the combine according to the second embodiment. The combine which concerns on Embodiment 2 replaces with a screw conveyor, and uses the bucket type elevator 144 for conveyance of a grain. Other configurations are the same as those of the combine according to the first embodiment. FIG. 15 is an internal side configuration diagram schematically showing the bucket elevator 144 and the grain tank 4 in an enlarged manner. In FIG. 15, the broken line arrow indicates the moving direction of the grain, and the round shape indicates the grain.

  Bucket type elevator 144 is formed by rear plate 500, front plate 501, left and right side plates 502, and top plate 144a (guide surface). The front plate 501 facing the top plate 144a is a non-guide surface.

  Pulleys 503 and 504 with axial centers in the left-right direction are respectively provided at the upper and lower portions inside the bucket elevator 144, and an endless belt (chain) 505 is wound around the pulleys 503 and 504. A plurality of buckets 506, such as a substantially U-shape in a side view when viewed from the upper side, are attached to the belt 505 at appropriate intervals.

  The driving force is transmitted (not shown in detail) to a pulley 504 provided at the lower part of the bucket type elevator 144, and the belt 505 is driven as the pulley 504 rotates, and the pulley 503 provided at the upper part of the bucket type elevator 144 rotates. A bucket 506 circulates along a belt 505 between a grain supply port (not shown) provided at the lower part of the bucket elevator 144 and a grain outlet 507 (opening) provided at the upper part of the bucket elevator 144. The

  And in the cut-off part 507a which is the top part of the backplate 500 which has in the grain discharge port 507 of the bucket type elevator 144 upper part, the cylindrical rotating shaft 510, such as a side view circular shape, is provided. The rotary shaft 510 is fixed by bearings or the like (not shown) provided at both ends of the cut-off portion 507a, and a fixed tension (not shown) is attached to the end of the rotary shaft 510 extending to the back side in FIG. Is provided.

  The spout sensor 300 is arranged in the vicinity of the top surface of the grain tank 4 and the grain outlet 507 in the grain tank 4. Further, the spout sensor 300 is located at a position separated from the top plate 144a, in other words, on the front plate 501 side with respect to the top plate 144a.

  As shown in FIG. 15, most of the extruded grains move along the top panel 144 a and are continuous in the grain tank 4 as indicated by the dashed arrows and circles near the top panel 144 a. It is thrown. In FIG. 15, as shown by the broken line arrow and the circle in the vicinity of the pulley 503, the remaining grains are thrown into the grain tank 4 in a discrete manner. A discrete grain instantaneously collides with the spout sensor 300.

  By positioning the spout sensor 300 on the front plate 501 (non-guide surface) side facing the top plate 144a (guide surface), a small amount of grains collides with the spout sensor 300 compared to the top plate 144a side, Grains are deposited on average in the grain tank 4.

  Of the configurations according to the second embodiment, detailed description of the same configurations as those of the first embodiment will be omitted.

  The embodiment described above is an exemplification of the present invention, and the present invention can be implemented in various modified forms within the scope defined by the matters described in the claims and the description of the claims. it can.

2 Threshing device 4 Grain tank (storage part)
4c Press switch 11 Handling cylinder 23 First screw conveyor (conveying means, screw conveyor)
23b Blades 40 Engine 44 Threshing clutch 51 Pickup sensor (rotational speed detection means)
100 control unit 100a CPU
100b ROM
100c RAM
100d EEPROM
100h LUT
144 Bucket type elevator (conveyance means)
144a Top plate (guide surface)
300 Throwing sensor (detection means)
301 Sensor body (fixed part)
302 Steel plate (support)
302a Through hole 303 Colliding plate (collision part)
303a receiving hole 304 screw

Claims (4)

A threshing device for threshing the harvested cereal, a storage unit for storing the grain threshed by the threshing device, a transport means for conveying the grain from the threshing device to the storage unit, and a storage unit In a combine comprising a casing that is connected to an opening formed on a side surface and that accommodates the conveying means, and a detecting means that is disposed in the storage unit and detects the amount of grain introduced by the conveying means. ,
The casing is
A guide surface for guiding the grains input from the conveying means to the storage unit;
A non-guide surface facing the guide surface via the transport means;
The detection means includes
In the storage part, located on the non-guide surface side and located on the top surface side of the storage part ,
The conveying means is a screw conveyor;
The detection means is located between the guide surface and the shaft portion of the screw conveyor on the non-guide surface side from a line intersecting the guide surface or an extended surface of the guide surface at a predetermined angle,
A blade plate is provided in the shaft portion at the end of the screw conveyor to throw the grain into the storage portion,
An accumulating means for accumulating the detection results of the detecting means detected during a period in which the grains introduced from the blades should collide;
Means for removing a steady-state deviation included in the integration result of the integration means based on a detection result of the detection means detected in a period outside the period;
Combine, characterized in Rukoto equipped with. The combine according to claim 1, wherein the detection unit includes a collision portion where the grain collides, and the collision portion is disposed toward the opening. The collision part is constituted by an elastic member,
The combine according to claim 2 , wherein the detecting means supports the collision part and has a support part having a hardness higher than that of the collision part. The detection means has a fixing part for fixing the support part in the storage part,
A housing hole for housing the head of the screw is provided in the elastic member,
A through hole having a smaller diameter than the accommodation hole is provided in the support part,
Insert the screw into the housing hole and the through-hole, and the head of the screw to engage with the periphery of the through hole, wherein the screw to claim 3, characterized in that are screwed to the fixed part Combine.

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