JP6731966B2 - combine - Google Patents

Description

The present invention relates to a combine configured to collect grains obtained by threshing a cut grain culm.

The combine harvester cuts the planted culm by the mowing unit in the front of the machine, threshing by handling the tip of the cultivated culm by the handling barrel that is driven and rotated inside the threshing device, and obtains by the threshing process. It is configured to convey and store the obtained grains toward a grain tank provided on the side of the threshing device. Then, in such a combine, as a configuration in which a part of the grain obtained by the threshing process is sampled from a planned location inside the machine body, for example, there is one configured as shown in Patent Document 1. ..

That is, inside the grain tank as an example of a planned presence location for storing the grain subjected to threshing treatment, the grain that is carried in from the threshing device to the grain tank in a state of being bounced off is measured and is used for grain incorporation. It is equipped with a pair of receiving screws in a line in the horizontal direction, receives the grains that are splashed and fed, and feeds them horizontally with a pair of screws and feeds them horizontally to the measurement point, and at the measurement point A measuring device for measuring the internal quality of the grain such as the amount of water while crushing the grain was provided, and the grain after the measurement was configured to be discharged to the outside.

In the above conventional configuration, the internal quality of the grain is measured by the measuring device during the execution of the reaping work, and the state of the grain to be harvested is detected and the information can be effectively used. It is a thing.

JP, 11-266668, A

However, in the above-described conventional configuration, the grain to be measured is sampled from among the grains subjected to threshing processing, and after measuring the internal quality, the grain after the measurement is discharged to the outside. Therefore, there is a disadvantage that the sampled grain is discarded and is wasted.

An object of the present invention is to provide a combine capable of measuring the internal quality of a grain during execution of a cutting operation without wasting the grain to be measured.

The combine according to the present invention is configured to collect the grain obtained by threshing the cut grain culm, convey the grain by the conveying device, and store the grain in the storage space of the grain tank. Then, a sampling unit for sampling a part of the grain obtained by the threshing process from the storage space to the measurement target space as a measurement target is provided, and the internal quality of the grain sampled by the sampling unit is measured. After the measurement, after the measurement is completed, the sampled grain for the measurement target is configured to be discharged from the measurement target space to the storage space, and the sampling means, to the storage space by the transport device. A receiving and holding portion configured to be able to switch between a holding state for receiving and holding a part of the supplied grain and a discharging state for returning the grain to the storage space, and the receiving and holding portion for the receiving and holding portion and the discharging state. An actuator for switching to a state, a supply state detecting means for detecting that a predetermined amount or more of grains have been supplied to the receiving and holding portion, and a predetermined amount or more of grains have been supplied by the supply state detecting means. When is detected, the measurement of the internal quality of the grain is started, and after the measurement of the internal quality of the grain is completed, the receiving and holding unit is switched to the discharging state to discharge the grain and return to the holding state. A control unit that operates the actuator to execute a grain discharge process is provided, and the control unit includes a detection process by the supply state detection unit, a measurement process of the internal quality of the grain, and the grain discharge. The processing device is configured to be repeatedly executed while performing a cutting operation, and the transport device supplies the grain into the grain tank from a supply port formed at an upper portion of the grain tank. It is configured and the receiving and holding portion is provided in a state of being located at a position lower than the supply port.

According to the first characteristic configuration, a part of the grain obtained through the threshing process by the sampling means is sampled as a measurement target from the storage space of the grain tank . The internal quality of the grain which has been sampled by the sampling means is measured, after which the measurement is completed, the sampling means returns the measurement is performed grain in storage space.

After sampling the grain thus for the measurement object for measuring the internal quality, measures the inner part quality, and, since the back of the presence planned portion of the grain to then measured, and the measurement object It has become possible to measure the internal quality of the grain during the mowing operation without wasting the grain.

Further, the sampling means, the holding portion receiving switched into the holding state, is adapted to hold receiving a portion of the grain to be supplied to the storage space from the outside of the grain tank, grain internal quality After the is measured , the receiving and holding unit is switched to the discharge state, whereby the grain can be returned to the storage space of the grain tank.

When grain on the holding portion receiving is that it has been supplied than a predetermined amount is detected by the supply state detection means, it performs the measurement of the internal quality, then, by operating the actuator, and is received in the holder receiving It is possible to discharge the existing grains and set the state to receive the grains thereafter.

Accordingly, the control means, by repeatedly performing the opening closing operation by internal quality measurement and actuator as described above, back into the grain tank grains After measuring the internal quality by sampling the grain It is possible to repeat that.

Further, the grain subjected to the threshing process is transported into the grain tank by the transport device, but at that time, the grain is supplied into the grain tank from the supply port formed in the upper portion of the grain tank.

Then, since the receiving and holding unit is provided in a state of being located at a position lower than the supply port, the receiving and holding unit will discharge the supplied grains toward the receiving and holding unit. It is possible to appropriately receive and hold a part of the threshed grain.

It is the whole side view of a combine. It is the whole top view of a combine. It is a front view of a grain tank. It is a partially cutaway plan view of a grain tank. It is a vertical front view of the weight measurement location of a grain tank. It is a perspective view of the weight measurement location of a grain tank. It is a control block diagram. It is a figure which shows the structure of an internal quality measuring device. It is a partially cutaway side view of a grain tank. It is a perspective view of a grain receiving and holding part. It is a partially cutaway side view of the grain tank of another embodiment.

Hereinafter, an embodiment of a combine according to the present invention will be described with reference to the drawings.
As shown in FIG. 1 and FIG. 2, the combine is configured to be self-removing, and includes a pair of left and right crawler traveling devices 2, and at the front of the machine, the planted culms to be harvested are cut off and the harvested culms are removed from the rear of the machine. The harvesting unit 5 for transporting the grain toward the stalk is provided behind the control unit 4, the threshing device 6 for threshing/selecting the harvested culm, and the grain tank 9 for storing the grains sorted and collected by the threshing device 6. A waste straw processing device 7 for treating the waste straw is provided. The engine 3, the control unit 4, the threshing device 6, the grain tank 9, and the like are placed and supported on the machine body frame 1.

Although illustration is omitted, the power from the engine 3 is transmitted to the left and right crawler traveling devices 2, while the power branched from the traveling transmission system is transmitted to the mowing section 5 via the transmission system for cutting and conveying. Further, the power transmission system is configured such that the power from the engine 3 is transmitted to the threshing device 6 and the power branched from the power is transmitted to the waste straw processing device 7.

The threshing device 6 nips the root side of the cut culm conveyed from the reaping section 5 by a feed chain (not shown) and conveys the culm side by a handling cylinder (not shown) that is rotationally driven in the handling room. By handling and threshing, the threshing process is performed by a sorting mechanism (not shown) provided inside the threshing device 6 to sort the threshed product into single-grained grains and dust such as straw scraps. It is configured such that the single-grained grains are collected, conveyed to the grain tank 9 and collected, and the dust is discharged to the outside of the machine. Further, the discharged straw after the threshing processing is configured to be shredded by the discharged straw processing device 7.

As shown in FIG. 2, the threshing device 6 is provided at the bottom thereof with a first-item recovery screw 10, and the first-item recovery screw 10 laterally feeds and conveys the grains along the machine width direction to the grain tank 9 side. Also, between the threshing device 6 and the grain tank 9, a screw conveyor type fried grain as a transport device is connected in a state of being interlockingly connected by a first item recovery screw 10 and a bevel gear transmission mechanism (not shown). A device 12 is provided.

Then, as shown in FIGS. 2 and 4, the grains laterally fed by the first-object recovery screw 10 are conveyed upward by the grain lifting device 12 and formed on the upper end portion of the grain lifting device 12. The discharge port 13 is configured to be conveyed into the grain tank 9 through a supply port 14 formed on the left side wall portion 9A of the grain tank 9.
As shown in FIG. 4, a rotary blade 12b is provided at the upper end of the drive shaft 12a of the grain lifting device 12 to bounce the grain toward the inside of the grain tank 9, and the grain is smoothed as much as possible. It is configured so that it can be stored in the grain tank 9.

As shown in FIG. 1, the bottom of the grain tank 9 is provided with a carry-out bottom screw 15 for transporting the grain toward the rear side of the machine body, and the carry-out bottom screw 15 is provided on the machine body rear side of the grain tank 9. A vertical feed screw conveyor 16 is provided for lifting and transporting the grain from the transporting end portion in a state of being interlocked and coupled via a bevel gear transmission mechanism (not shown). Further, on the upper portion of the vertical feed screw conveyor 16, the base end portion of the horizontal feed screw conveyor 18 which horizontally feeds and conveys the lifted grain and discharges it from the discharge port 17 at the tip is vertically moved around the horizontal axis P1. The bevel gear transmission mechanism (not shown) is rotatably connected in an interlocking manner.

That is, the grains stored in the grain tank 9 can be conveyed by the carry-out bottom screw 15, the vertical feed screw conveyor 16 and the horizontal feed screw conveyor 18 and discharged from the discharge port 17 to the outside. Is configured.

The vertical feed screw conveyor 16 is configured to be rotatable around a vertical axis P2 by the operation of an electric motor 19 with a speed reducer, and the horizontal feed screw conveyor 18 is rotated by a hydraulic cylinder 20 around a horizontal axis P1 at the base end. The horizontal feed screw conveyor 18 is rotated and moved up and down to change the position of the discharge port 17 so that the grains are discharged to a transport truck or the like outside the machine. You can

As shown in FIG. 1, a bevel gear transmission mechanism (not shown) interlockingly connecting the carry-out bottom screw 15 and the vertical feed screw conveyor 16 is installed in the lower portion of the rear side wall portion 9C of the grain tank 9, and the grain tank A bevel gear case 24 is connected to cover the rear end of the carry-out bottom screw 15 that projects rearward of the vehicle 9 and the start end of the vertical feed screw conveyor 16. The bevel gear case 24 is integrally formed with a cylindrical support shaft portion 24A extending downward from the bottom portion thereof.

The machine body frame 1 is provided with a shaft support portion 1G that supports the support shaft portion 24A of the bevel gear case 24 so as to be relatively rotatable, and the grain tank 9 supports the support shaft portion 24A of the bevel gear case 24 that serves as a vertically oriented support shaft. It is configured to be supported by the machine body frame 1 so that the swinging operation in the left-right direction can be performed.

With such a configuration, the grain tank 9 is retracted toward the inside of the machine body by swinging and displacing the front side of the machine body in the left-right direction with the support shaft portion 24A of the bevel gear case 24 located at the rear end as a fulcrum. Then, the left side wall 9A is adjacent to the threshing device 6 and the working position in which the supply port 14 communicates with the discharge port 13 of the fried device 12 and the lateral side overhang and the front side is separated from the threshing device 6. The position can be freely changed over to the maintenance position where the rear side of the engine 3 and the right side of the threshing device 6 are opened (see FIG. 2 ).

However, as shown in FIG. 3, since a belt tension type discharge clutch 70 that can be switched between a transmission state in which the power from the engine 3 is transmitted to the unloading bottom screw 15 and a disconnection state in which the transmission is cut off is provided, the grain When switching the tank 9 from the working position to the maintenance position, the discharge belt 70 is switched to the disengaged state, and then the transmission belt 71 is removed. Further, as shown in FIG. 3, near the bottom portion of the grain tank 9 and the left side wall portion 9A, spring engagement type locking mechanisms 72 and 73 for locking the grain tank 9 in a state where the grain tank 9 is switched to the working position are provided. It is equipped.

In this combine, the load cell 25 as a weight measuring means for measuring the weight of the grain stored in the grain tank 9 can receive the load of the grain tank 9 located at the working position and measure the weight. The load cell 25 is provided in the machine body frame 1 to measure the weight with the load cell 25 while receiving and supporting the lower end of the grain tank 9 as the grain tank 9 rotates from the maintenance position toward the working position. A receiving guide body 26 is provided for guiding to a predetermined position.

As shown in FIGS. 3 and 5, the lower end support portion of the grain tank 9 guided by the receiving guide body 26 is rotatably supported around the horizontal axis and can roll on the receiving guide body 26. It is composed of rollers 27. The roller 27 is rotatably supported by a lateral support shaft 28 in a state of protruding below the lower end of the support member 21 with respect to the support member 21 attached to the lower front side of the grain tank 9. There is. When the grain tank 9 is at the working position, the roller 27 is provided in a state of being located at a substantially central portion in the left-right width direction of the grain tank 9 when viewed in the machine longitudinal direction of the grain tank 9. There is. As shown in FIG. 3, the support member 21 is fixed to the lower end of the front vertical wall portion 9B of the grain tank 9, and supports the transmission member of the discharge clutch 70 of the grain tank 9, the lock mechanism 72, and the like. It is a thing.

The receiving guide body 26 is switched between a load receiving state in which it is placed from above with respect to the weight detection unit 25A provided on the upper portion of the load cell 25 and a retracted state in which it is retracted outward so as to open the upper side of the load cell 25. It is provided freely. That is, as shown in FIGS. 5 and 6, a pair of front and rear brackets 30 are fixedly provided on the lateral outer surfaces of the front-back facing frame portion 1A provided on the lateral width direction outer portion of the machine body frame 1. A base end portion 26A of the receiving guide body 26 is supported by 30 so as to be rotatable around the machine front-rear axis P4.

Then, when the guide placing portion 26B is provided in a state of integrally extending from the base end portion 26A and the receiving guide body 26 is switched to the load receiving state, as shown by the solid line in FIG. When the placing portion 26B is positioned closer to the inside of the aircraft than the base end portion 26A and the receiving guide body 26 is switched to the retracted state, as shown by the phantom line in FIG. It is in a state of being located on the outer side of the machine body with respect to the end portion 26A.

As shown in FIG. 5, the upper guide surface 31 of the guide placing portion 26B rolls as the grain tank 9 rotates from the maintenance position to the working position in a state where the load receiving state is switched to. The roller 27 guided is formed in an inclined posture so that it is inclined at a gentle inclination angle so as to be displaced upward.

As shown in FIGS. 5 and 6, the weight detection unit 25A is positioned below the receiving guide body 26 that has been switched to the load receiving state, and receives the receiving guide body 26 by the weight detection unit 25A. The load cell 25 is provided in a state in which the main body portion 25B is placed and supported by the use frame portion 1B. When the grain tank 9 is in the working position, the load cell 25 is located at a position corresponding to the approximate center of gravity of the grain tank 9 in the machine front-rear direction, and the load cell 25 is provided with a flange portion 25C with respect to the supporting frame portion 1B. It is configured to be attachable and detachable by screwing.

When the grain tank 9 rotates from the maintenance position to the working position, the roller 27 is rolled and guided along the upper guide surface 31 of the inclined position of the guide placing portion 26B, and the roller 27 is lifted slightly upward. Will be guided in. Then, the load of the grain tank 9 is received by the weight detection unit 25A of the load cell 25 via the roller 27 and the receiving guide body 26.

In this way, the load on the front side of the machine body of the grain tank 9 in the working position is received by the load cell 25 via the receiving guide body 26, and the grains stored in the grain tank 9 by the load cell 25. It is configured to be able to measure the weight of the grain. In addition, at the support location where the grain tank 9 is swingably supported on the machine body frame 1, there is vertical accommodation so that the grain tank 9 can be slightly moved in the vertical direction. The load cell 25 can directly receive the load of the grain tank 9, and the weight of the stored grain can be measured.

The detection value of the load cell 25 may cause an error due to the tilt of the combine body, but the measurement error due to such tilt of the body is corrected. That is, as shown in FIG. 7, a left/right tilt angle sensor 32 for detecting the left/right tilt angle of the machine body and a front/rear tilt angle sensor 33 for detecting the front/rear tilt angle are provided, and the front/rear tilt angle is controlled by the control device 57 described later. Also, the detection value of the load cell 25 is corrected by using the detected values of the left and right inclination angles and the correction arithmetic expression previously obtained by experiments and the like, and the accurate storage amount of the grain is obtained. There is.

Then, although the storage amount of the grain will be sequentially changed as the mowing work is performed, the control unit 4 is provided with the storage amount of the grain which is detected by the load cell 25 and is corrected and obtained. The display device 34 is configured to display. The load cell 25 can detect the weight of the stored grains in a stepless manner, and the display device 34 has a high resolution, such as a multi-level level meter display or a numerical display, so that a small change can be recognized. It has a display form. With such a configuration, whether or not a small amount of grains remain in the grain tank 9 not only during the mowing work but also by confirming the display content of the display device 34 at the start of the work, for example. You can also check if.

In this combine, a sampling means SP for sampling a part of the grain obtained by the threshing process as a measurement target from the storage space J of the grain tank 9 as an example of a planned location inside the machine body, and a sampling means SP Is provided with an internal quality measuring device 36 as an optical internal quality measuring device for measuring the internal quality of the grain sampled by the sampling means SP, and sampling is performed after the measurement by the internal quality measuring device 36 is completed. The measured grain for measurement is returned to the storage space J of the grain tank 9.

Then, the sampling means SP is provided in the grain tank 9 and holds a state of holding and holding a part of the grain supplied from the outside of the grain tank 9 to the storage space J and holding the grain. The receiving/holding unit 48 configured to be switchable to the discharge state of returning to the working space J is configured, and the internal quality measuring device 36 uses the receiving/holding unit 48 to measure the grains held in the receiving/holding unit 48. Is configured to measure the internal quality of the grain.

Further, the receiving and holding unit 48 is configured to include a bottomed box-shaped body 49 having an open top so that a part of the grains supplied from the outside can be collected, and the bottomed box-shaped body 49 is provided. Is configured to be swingable between a closed state in which the grains are held and an opened state in which the grains are discharged downward, and the sampling means SP is an actuator for switching the bottom plate 50 between the open state and the closed state. An electric motor 56 with a deceleration type as an example, a supply state detection sensor 60 as a supply state detection unit that detects that a predetermined amount or more of grains have been supplied to the receiving and holding unit 48, and the supply state detection sensor 60 When it is detected that a predetermined amount or more of grains have been supplied, the internal quality measuring device 36 executes the measurement process, and then the bottom plate 50 is switched to the open state to discharge the grains and return to the closed state. A control device 57 is provided as a control means for operating the electric motor 56 so as to execute the discharging process.

Hereinafter, a specific configuration will be described.
That is, as shown in FIG. 9, the front vertical wall portion 9B is located on the outer side (front side) of the front vertical wall portion 9B as a wall portion that forms the storage space J of the grain tank 9. Internal quality as an optical internal quality measuring means capable of measuring the internal quality of the grain located in the measurement target space Q among the grains stored in the grain tank 9 via the light transmitting portion 35 formed in A measuring device 36 is provided.

The internal quality measuring device 36 includes a light projecting unit O that projects light from the outside of the grain tank 9 toward the inside through the light transmitting unit 35, and a light transmitting unit 35 from the grain located inside the grain tank 9. It is configured by a reflection type internal quality measuring device 36 including a light receiving portion I that receives light emitted toward the outside through.

That is, as shown in FIG. 8, the internal quality measuring device 36 includes a light source unit 37 including a tungsten-halogen lamp that emits infrared light as a measuring light beam, and a measuring light beam and a grain from the light source unit 37. The measuring probe 38 that guides the diffusely reflected light from the grain and the measuring light beam that is guided by the measuring probe 38 are irradiated to the grain, and the diffusely reflected light from the grain is received to the measuring probe 38. A light emitting/receiving adapter 39 for guiding, a spectroscopic measuring section 40 for measuring a spectroscopic spectrum of diffuse reflected light guided by the measuring probe 38, and a component contained in the grain based on the spectroscopic spectrum obtained by the spectroscopic measuring section 40. And a calculation unit 41 that calculates the component based on Although not shown, a shutter unit is provided which can be switched between an irradiation state in which the measuring light beam from the light source unit 37 is irradiated onto the grain and a non-irradiation state in which the irradiation is not performed.

As shown in FIG. 8, the measuring probe 38 includes an irradiation optical fiber 42 and a light receiving optical fiber 43. The irradiation optical fiber 42 and the light receiving optical fiber 43 are ring-shaped parts except for the incident end side of the measuring light beam in the irradiation optical fiber 42 and the emission end side of the diffuse reflected light in the light receiving optical fiber 43. Of the irradiation optical fiber 42 is formed coaxially so that the light receiving optical fiber 43 is located inside the irradiation optical fiber 42, and the coaxial tip surface has an annular end surface of the irradiation optical fiber 42 and the light receiving optical fiber inside thereof. The circular tip end surface of 43 is flush.

The light emitting/receiving adapter 39 is attached to the tip of the measuring probe 38, and has an outer cylindrical body 39a, an inner cylindrical body 39b located inside the outer cylindrical body 39a and coaxially spaced from the outer cylindrical body 39a, and an outer cylindrical body 39b. A connecting member 39c that connects the tubular body 39a and the inner tubular body 39b, a support member 39d that connects and fixes the measuring probe 38, and the like are configured.
The inner cylinder 39b is formed in a substantially conical shape in which the cylinder inner diameter and the cylinder outer diameter become smaller as they come closer to the fiber connecting portion on the base end side, and the thickness of the peripheral wall becomes smaller as they come closer to the measurement probe 38. The inner and outer peripheral surfaces of the inner cylindrical body 39b are mirror-finished so that light can be reflected. Similarly, the outer cylindrical body 39a is also formed into a substantially conical shape in which the inner diameter and the outer diameter of the cylinder become smaller as they come closer to the fiber connecting portion on the proximal end side, and the inner peripheral surface of the outer cylindrical body 39a can reflect light. It is finished in a specular surface. An annular opening formed by the tip of the inner tubular body 39b and the tip of the outer tubular body 39a is the light projecting portion O, and the tip end opening on the inner side of the inner tubular body 3b is the light receiving portion I. I try to make each work.

As shown in FIG. 8, the light emitting/receiving adapter 39 is installed at a location corresponding to the light transmitting portion 35 outside the grain tank 9, and emits light from the outside of the grain tank 9 to the inside through the light transmitting portion 35. It is configured to project light and to receive light emitted outward from the grain located inside the grain tank 9 through the light transmitting portion 35.

As shown in FIG. 8, a cover body 44 formed of a light shielding member that covers the outer side region of the internal quality measuring device 36 other than the portion of the light emitting and receiving adapter 39 facing the storage space J of the grain tank 9 is provided. Has been. By including such a cover body 44, it is less likely that ambient light from the outside is applied to the grain and a measurement error occurs due to the ambient light.

Although not shown, the spectroscopic measurement unit 40 includes a diffraction grating that spectrally reflects diffusely reflected light guided by the light receiving optical fiber 43, an array type light receiving element that detects the spectrally reflected light flux intensity for each wavelength, and the like. The array type light receiving element is configured to simultaneously receive the spectrally reflected diffusely reflected light for each wavelength and to convert and output the signal for each wavelength. That is, it is possible to obtain the spectral spectrum data of the received light.

The transparent glass plate 45 as a translucent member that constitutes the light transmissive portion 35 is detachably provided on the front vertical wall portion 9B of the grain tank 9. That is, as shown in FIG. 8, the transparent glass plate 45 is inserted into the concave portion 46 formed in the front vertical wall portion 9B and is sandwiched by the coupling flange portion 44a of the cover body 44, and the coupling flange portion 44a is front side. The vertical wall portion 9B is fastened and fixed to the vertical wall portion 9B with a screw 47, and the transparent glass plate 45 can be easily removed by removing the screw 47.

The internal quality measuring device 36 measures the internal quality by using a component analysis method utilizing the absorption spectrum of near-infrared light. The absorption spectrum is analyzed based on the analysis, and the amounts of components such as water, protein and amylose contained in the grain are determined based on the analysis result, and the taste is measured based on them. Then, the grain supplied to the grain tank 9 is sampled continuously with the cutting operation, and the above-described measurement is performed.

Briefly adding the measurement process, the absorption spectrum data showing the absorbance for each wavelength is obtained from the measurement spectrum data obtained by receiving the light from the grain and the preset reference spectrum data, and it is obtained. Using a value of a specific wavelength of the second-order differentiated value and a calibration curve set in advance for each target component, as the internal quality contained in the grain, water content, protein, amylose, etc. The quantitative value of the chemical components can be obtained, and the taste evaluation value of the grain can be obtained from the quantitative values of the chemical components.

A plurality of calibration curves for each component will be created in advance as follows. That is, based on the absorbance spectrum data actually measured by the internal quality measuring device 36 and the measured value of the chemical component obtained from the result of the component analysis by destroying the grain used for the measurement at that time, The calibration curve showing the correspondence between the measurement result of the internal quality measuring device 36 and the actual chemical component amount of the grain is created.

Then, at a position corresponding to the light transmitting portion 35 inside the grain tank 9, a holding state for receiving and holding a part of the threshed grain and a discharging state for discharging the grain into the grain tank 9 are switched. The receiving and holding unit 48 configured to be capable is provided, and the internal quality measuring device 36 is configured to measure the internal quality of the grain received and held by the receiving and holding unit 48.

The receiving and holding unit 48 is located at a position lower than the supply port 14 through which the grains are splashed and supplied into the grain tank 9 by the rotary blade 12b provided at the upper end of the drive shaft 12a of the grain lifting device 12. The grains that are provided in the above and are blown and supplied are easily received by the receiving and holding portion 48.

The receiving and holding unit 48 is configured to include a bottomed box-shaped body 49 having an open top so that a part of the grain supplied from the outside can be collected, and The bottom plate 50 is swingable between a closed state in which the grains are held and an open state in which the grains are discharged downward.

9 and 10, the bottomed box-shaped body 49 forms a rectangular tube portion 51 forming the peripheral surface of the measurement target space Q and the bottom of the measurement target space Q, as shown in FIGS. 9 and 10. And a bottom plate 50 for controlling the square tubular portion 51, the square tubular portion 51 is fixedly supported on the front vertical wall portion 9B of the grain tank 9, and the end portion of the bottom plate 50 is swingably supported with respect to the square tubular portion 51. Has been done. On a side surface of the square tubular portion 51 on the inner side of the grain tank 9, the bottom plate 50 can be switched between an open state in which the lower opening 52 of the square tubular portion 51 is opened and a closed state in which the lower opening 52 is closed. A drive casing 54 in which 53 is incorporated is attached. In addition, an opening 55 for light transmission for internal quality measurement is formed on the side surface of the rectangular tube portion 51 on the outer side of the tank.

The switching mechanism 53 is configured such that the bottom plate 50 can be rocked by an electric motor 56 between open and closed states. Inside the driving casing 54, the bottom plate 50 is opened in addition to the switching mechanism 53. An open state detection switch 58 that is turned on when it is detected that the bottom plate 50 has been swung up to a closed state, and a closed state detection switch 59 that is turned on when it is detected that the bottom plate 50 is swung up to a closed state.

Further, as shown in FIG. 7, a control device 57 including a microcomputer as a control means for controlling the operation of the electric motor 56 is provided.
The opening/closing operation of the bottom plate 50 by the control device 57 will be described. When switching to the open state, the electric motor 56 is operated so as to swing the bottom plate 50 in the closed state toward the open state, and then the open state is detected. When the switch 58 is turned on, the operation of the electric motor 56 is stopped. On the contrary, when switching to the closed state, the electric motor 56 is operated so as to swing the bottom plate 50 in the open state toward the closed state, and then, when the closed state detection switch 59 is turned on, the electric motor 56 is operated. To stop.

A supply state detection sensor 60 as a supply state detection unit that detects that a predetermined amount or more of grain has been supplied is provided at the upper end inside the receiving and holding unit 48, and is a lower side portion of the receiving and holding unit 48. And a grain presence/absence sensor 61 as a grain presence/absence detection unit that detects whether or not grain is present at a position slightly lower than the lower end position of the bottom plate 50 when the state is switched to the open state. Is provided. The supply state detection sensor 60 and the grain presence/absence sensor 61 are each configured by a capacitance type proximity sensor.

If the presence or absence of the grain is not detected by the grain presence/absence sensor 61, the control device 57 informs the supply state detection sensor 60 that the grain is supplied to the receiving/holding unit 48 in a predetermined amount or more in association with the cutting operation. Every time it is detected by the internal quality measuring device 36, and thereafter, the bottom plate 50 is switched to the open state to discharge the grains into the grain tank 9 and then returned to the closed state. Is configured to operate the electric motor 56. However, when the presence or absence of the grain is detected by the grain presence/absence sensor 61, it is impossible to contact the grain and switch the bottom plate 50 to the open state, and thereafter, the measurement process and the grain discharge process are performed. I try not to.

That is, the internal quality is measured multiple times in one field. Further, when it is detected by a not-shown full detection sensor that the storage amount of the grains in the grain tank 9 is almost full, the weight of the storage amount of the grains at that time is measured, and The measurement of the weight of such grain storage amount is also performed a plurality of times in one field, and the measurement data thereof is stored in a storage device (not shown). Since the internal quality measuring device 36 also measures the water content as the internal quality of the grain, when the weight of the grain storage amount is measured, the control device 57 causes the grain to be dried, that is, The dry weight when the amount of water reaches a predetermined value (for example, 14.5%) is also calculated.

[Another embodiment]
(1) In the above embodiment, the internal quality measuring device 36 of the reflection type measures the internal quality of the grain. However, instead of such a structure, the internal quality measuring device of the transmission type is used. It may be done. For example, the wall portion 9B of the grain tank 9 may be formed with protrusions that partially project outward, and both sides may be formed of a transparent body so that the light projecting section O and the light receiving section I are disposed on both left and right sides. Further, the light projecting portion O may be provided on another wall portion different from the wall portion on which the light receiving portion I is provided.

( 2 ) In the above embodiment, each of the supply state detection sensor 60 and the grain presence/absence sensor 61 is shown to be configured by a proximity sensor, but instead of the proximity sensor, an optical presence sensor or a contact type sensor is used. Other types of sensors such as the presence/absence sensor may be used.

( 3 ) In the above-described embodiment, the light transmissive member 45 forming the light transmissive portion 35 is detachably attached to the wall portion 9B, but it may be provided in a position-fixed state for easy cleaning. Good.

( 4 ) In the above embodiment, the one applied to the self-removing combine is shown, but a normal combine may be used.

INDUSTRIAL APPLICABILITY The present invention can be applied to a self-removing combine or a normal combine.

9 grain tank 12 conveying equipment
1 4 supply port
4 8 Receiving and holding part
5 6 actuator 57 control means 60 supply state detection sensor (supply state detected hand position)
J reservoir for the sky between the
S P sampling means

Claims (1)

A combine harvester that collects grains obtained by threshing a cut culm, conveys the grains by a conveying device, and stores the grains in a storage space of a grain tank,
Sampling means for sampling a part of the grain obtained by the threshing process into the measurement target space as the measurement target from the storage space is provided,
The internal quality of the grain sampled by the sampling unit is measured, and after the measurement is finished, the sampled grain for the measurement target is configured to be discharged from the measurement target space to the storage space,
The sampling and holding means is configured to be capable of switching between a holding state for receiving and holding a part of the grains supplied to the storage space by the transport device and a discharging state for returning the grains to the storage space. Department,
An actuator for switching the receiving and holding portion between the holding state and the discharging state;
Supply state detection means for detecting that the grain is supplied to the receiving and holding unit by a predetermined amount or more, and when it is detected that the grain is supplied by a predetermined amount or more by the supply state detecting unit , After the measurement of the internal quality is started and after the measurement of the internal quality of the grain is completed, the receiving and holding unit is switched to the discharge state to discharge the grain and return to the holding state. A control means for actuating the actuator, and
The control means is configured to repeatedly perform the detection processing by the supply state detection means, the measurement processing of the internal quality of the grain, and the grain discharge processing while performing the cutting operation traveling,
The transfer device is configured to supply the grain into the grain tank from a supply port formed in the upper part of the grain tank, and the receiving and holding portion is lower than the supply port. Combines that are equipped in the state.

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