JP4445843B2 - Rice milling machine - Google Patents

Description

  The present invention relates to a rice mill, and more particularly, to a rice mill provided with a blowing device that discharges the remaining rice in a milling chamber by blowing compressed air or the like.

In general, a rice milling machine grinds the rice bran layer on the surface of brown rice while feeding brown rice between the milling roll rotating at the center of the milling mill and the surrounding milling net, and scraping it by friction, thereby removing the brown rice into white rice and divided rice. It is something that will be elaborate.
Among such rice mills, there is a type in which brown rice is fed into the milling chamber, for example, residual rice is generated in the milling chamber at the end of milling due to, for example, from below to above or from the side. For this reason, conventionally, a rice milling machine equipped with a blast device that injects compressed air from the rear in order to discharge residual rice in the milling chamber at the end of milling has been proposed (for example, see Patent Document 1).

However, in the above-described conventional rice mill, dust such as rice bran scraped from the brown rice by the milling action is sucked into the dust collector through a duct connected to the milling chamber cover (coffin cover) covering the milling chamber. At the same time, the semen chamber cover is provided with an intake port for taking air into the semen chamber cover, which has a negative pressure during operation of the dust collector. Therefore, the residual rice in the milling chamber sticks to the milling net when the dust collector is in operation, and it cannot be discharged even if compressed air is applied in the direction of discharging outside the machine. There was a problem. In order to solve this problem, it is conceivable to stop the operation of the dust collector when the residual rice is discharged. However, since the dust collector is often connected to equipment other than the rice mill, It is not reasonable to stop the operation of the dust collector.
Furthermore, the compressed air blown toward the remaining rice in the milling chamber passes through the mesh of the milling net to the suction port of the milling chamber cover or is sucked into the dust collector, so that the remaining rice is not discharged. There is also a problem of not.
And if there is residual rice in the machine, it will mix with the next lot of brown rice and cause contamination problems, so it was necessary to drain the residual rice manually (cleaning, in some cases disassembly and cleaning).

JP-A 63-185461

  Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, and at the end of milling, it is possible to discharge residual rice by a jet of compressed air without stopping the operation of the dust collector. The purpose is to provide a simple rice milling machine.

The invention according to claim 1 for achieving the above object, a pearling chamber cover inlet is provided with accommodating the pearling rolls and pearling network rotatable cutting the bran layer of the surface of brown rice, pre Symbol pearling chamber cover Dust collecting means that communicates with the inside and sucks the rice cake scraped off from the surface of the brown rice, and a blasting means that blows compressed gas to the residual rice in the milling chamber formed by the milling roll and the milling net at the end of milling And a closing means for closing the intake port of the semen chamber cover at the end of scouring, and a blocking means for shutting off between the semen chamber and the dust collecting means. Whether or not the milling is finished based on the detection value from the detection means for detecting the presence or absence of the brown rice passing through and the load current value of the driving source for rotating the milling roll, and the detection means Detecting and If it is determined that the finishing of the semen is completed when the value is equal to or lower than a preset value, the closing means closes the suction port of the semen chamber cover, and the blocking means causes the semen chamber to collect the dust collecting means. It is characterized by comprising control means for interrupting the gap.

According to the first aspect of the present invention, the control means of the rice milling machine finishes milling when the detection means detects the absence of brown rice and the load current value of the drive source is equal to or lower than a preset value. It is judged that. Then, the control unit, which has determined that it is at the end of the semen, blows the compressed gas from the squirting means toward the residual rice in the semen chamber, closes the suction port of the semen chamber cover by the closing means, and shuts off the suction means Block between the semen chamber and the dust collecting means. As a result, the suction force of the dust collecting means is cut off, so that there is no sticking of the residual rice to the fine net, the residual rice can be easily moved, and the compressed air blown from the blowing means Since the gas is prevented from coming out from the intake port of the semen chamber cover or sucked into the dust collecting means, the residual rice can be blown off toward the discharge side. As a result, it is possible to provide a rice mill capable of discharging residual rice by a blast of compressed air without stopping the operation of the dust collector.

  At the end of milling, the milled rice can shut off the suction force of the dust collector and close the suction port of the milling chamber cover to discharge residual rice by compressed air blast without stopping the dust collector. The machine was realized.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a rice milling machine to which the present invention is applied, FIG. 2 is a schematic diagram of the rice milling machine in the same example, FIG. 3 is a side view of a friction-type rice milling machine in the same example, and FIG. FIG. 5 is an exploded perspective view of the shut-off device in the same example, FIG. 6 is a side view of the sperm chamber cover in the example, and FIG. 7 is a plan view of the sperm room cover. 8 is a plan view of the sperm chamber cover in which the air inlet is blocked by the blocking portion.

  The present invention is applied to a rice mill equipped with blowing means for blowing compressed air from behind to discharge residual rice in the polishing chamber when finishing milling, as shown in FIGS. The rice milling machine 10 has two upper and lower grinding-type rice milling (milling) machine parts 11 and a friction-type rice milling (milling) machine part 12 for cutting the surface of the brown rice. A first blowing device 13 (for example, a blower) as a first blowing means that performs compression from the rear of the milling chamber to the front in order to discharge residual rice in the friction-type rice milling machine unit 12 at the end of milling A second blast device 13 ′ (for example, a compressor, both shown in FIG. 2) as a second blast device for blowing air is provided.

  On the upper surface of the casing of the rice mill 10 is provided with a funnel-shaped inlet 15 for guiding brown rice discharged downward from the circulating rice milling tank 14 (shown in FIG. 1) into the casing. A rice sensor 16 as a rice detecting means for detecting the presence or absence of brown rice passing through the inlet 15 is provided at the inlet 15. As shown in FIG. 2, the detection value detected by the rice sensor 16 is input to the control unit 17 as a control means for controlling the milling by the rice milling machine 10. Then, the control unit 17 automatically starts squeezing when an output signal from an operation unit (not shown) provided on the front surface of the housing is input and a detection signal of presence of rice is input from the rice sensor 16. Is set in advance so that the first and second blowing devices 13, 13 ′ are appropriately controlled.

  As shown in FIG. 2, the grinding type rice milling machine unit 11 is disposed horizontally on the lower side of the inlet 15 so as to extend in the longitudinal direction of the machine body, and the brown rice from the inlet 15 extends downward. It is guided into the grinding-type rice milling unit 11 through the shaped member 18. This grinding type rice milling machine 11 is equipped with a horizontal single-shaft / single-chamber grinding type milling chamber 19 for horizontally conveying the brown rice flowing down from the inlet 15 to the grinding type milling chamber 19 on the front side of the machine body. A grinding roll shaft in which a screw conveyor unit 20 and a grinding roll 22 for shaving a hard surface of brown rice together with a cylindrical scouring net 21 in a grinding type milling chamber 19 with a brown rice weight ratio of about 1% are connected to one axis. 23 is rotatably arranged.

  A front side of the grinding roll shaft 23 is provided with a discharge port (not shown) for discharging the milled rice from the grinding type milling chamber 19, and a horizontal umbrella-shaped movable body capable of opening and closing the discharge port. A pressure adjustment unit 24 is provided for adjusting the wrinkle accuracy by urging the shaft toward the axial direction. A belt 26 for transmitting the rotational driving force of an electric sub motor 25 as a drive source arranged in parallel below the grinding roll shaft 23 to the grinding roll shaft 23 is provided at the rear of the grinding roll shaft 23. It is wound.

  Then, when the rotational driving force of the auxiliary motor 25 is transmitted to the grinding roll shaft 23 via the belt 26, the grinding roll shaft 23 rotates at a constant high speed at the center of the grinding type milling chamber 19, so that the surface of the brown rice is removed. As shown in FIG. 1, the dust such as the shavings is sucked into a dust collector 28 as a dust collecting means disposed outside the machine body through a duct 27 connected to the grinding-type rice milling machine 11. Is done. The dust collector 28 is set to operate by a control means different from the control unit 17 of the rice mill 10.

  After the grinding by the grinding-type rice milling unit 11 is finished, the ground rice is discharged from the discharge port, and then guided to the friction-type rice milling unit 12 through a bowl-shaped member 29 extending downward. . By the way, a branching portion 31 is provided at an intermediate portion of the bowl-shaped member 29 so that the grinding milled rice discharged from the grinding-type rice milling unit 11 can be discharged out of the machine from the grinding rice exit 30. 31 enables to obtain germinated rice (the one that leaves the germ portion of rice), or to discharge the hard rice grains of the straw layer like old rice and recirculate them to the grinding-type rice milling unit 11 again. ing.

  As shown in FIGS. 2 and 3, the friction-type rice milling machine 12 includes a horizontal type single-shaft / one-chamber friction-type milling chamber 32, and grinding that has been discharged from the grinding-type milling chamber 19. A screw conveyor 33 for horizontally conveying the milled rice to the friction type milling chamber 32 on the front side of the machine body, and the milled layer on the surface of the ground milled rice in the friction milling chamber 32 together with the cylindrical milling net 34 and about the weight ratio of brown rice A friction roll shaft 36, which is connected to a friction roll 35 as a milling roll that cuts about 9%, is rotatably arranged in a state of being housed in a box-shaped milling chamber cover 37.

  As shown in FIG. 3, a discharge port 38 is provided at the front portion of the friction type milling chamber 32 to discharge the white rice that has undergone friction milling in the friction type milling chamber 32. A pressure adjustment unit 39 (shown in FIG. 2) is provided that adjusts the accuracy of the heel by urging a horizontal umbrella-shaped movable body (not shown) that can be opened and closed in the axial direction. Further, as shown in FIG. 3, an air valve that blows compressed air from the second blowing device 13 'toward the front of the discharge port 38 at the rear portion of the friction type semen chamber 32 as shown in FIG. A plurality of 40 are provided. The outlets of these air valves 40 are provided so as to flow in parallel along the inner peripheral surface of the fine mesh net 34 so that the compressed air that blows can reach farther.

  Further, as shown in FIGS. 2 and 3, the friction roll shaft 36 uses a hollow shaft and is connected to the first blowing device 13 at the rear end portion of the shaft. Compressed air from 13 can be introduced into the shaft. Further, a vent hole 36a that allows the compressed air introduced into the shaft to be discharged into the friction roll 35 connected to the front end of the friction roll shaft 36 is provided on the circumference of the front end portion of the friction roll shaft 36. Are arranged in a row at intervals of about 90 degrees.

  As shown in FIG. 3, the friction roll 35 is formed in a hollow shape so that the friction roll shaft 36 can be fitted therein. Two protrusions 35a extending non-linearly in the longitudinal direction are integrally formed at positions different by about 180 degrees. As shown in FIG. 4, slits 35 b that communicate between the inside and the outside of the friction roll 35 are discontinuously provided along the convex portions 35 a at positions adjacent to the base portions of the convex portions 35 a. As a result, the compressed air can be exhausted uniformly and vigorously from the inside of the friction roll 35 toward the outside, that is, toward the friction-type squeezing chamber 32 during squeezing.

  Further, as shown in FIG. 2, a rotational driving force of an electric main motor 41 as a drive source arranged in parallel below the friction roll shaft 36 is provided at the rear portion of the friction roll shaft 36. A belt 42 is wound around the belt. The main motor 41 rotates the friction roll shaft 36 at a constant speed during fine adjustment.

  Further, the load current value for controlling the output of the main motor 41 is provided to various controls at the end of the fine adjustment by the control unit 17. Then, when the rotational driving force of the main motor 41 is transmitted to the friction roll shaft 36 via the belt 42, the friction roll shaft 36 rotates at a constant high speed at the center of the friction type milling chamber 32, and thus from the surface of the brown rice. The shavings are scraped off, and dust such as shavings is sucked into the dust collector 28 via a duct 43 (shown in FIG. 1) connected to one side surface of the finishing chamber cover 37.

  As shown in FIGS. 1 and 4, the duct 43 is provided with a blocking device 44 as blocking means for blocking the dust collector 28 side and the semen chamber cover 37 side. As shown in FIGS. 4 and 5, the blocking device 44 is provided with an opening 45 a having a diameter substantially the same as the duct diameter on the lower side and a cantilever for being cantilevered by an air actuator 46 described later. A flat opening / closing shutter 45 integrally formed with a support 45b, an air actuator 46 that moves the opening / closing shutter 45 up and down in the vertical direction of the machine body, and supports both sides of the opening / closing shutter 45 in a slidable manner. In addition, a pair of discontinuous pairs for supporting the outer peripheral portion of the pair of flat plate-like support bodies 47 and 48 provided at the central portion and the opening / closing shutter 45 so as to be slidable with each other. Frame-shaped support frames 49a and 49b, and a mounting frame 50 that is bent in an L-shape to attach the shut-off device 44 to the airframe. That. The air actuator 46 is driven and controlled by the control unit 17, and a slide portion 46a that cantilever-supports the opening / closing shutter 45 slides smoothly along a slide shaft 46b that is erected in the vertical direction of the machine body. Is configured to do.

  The control unit 17 controls the air actuator 46 so that the opening / closing shutter 45 is fixed at the raised position when the rice milling machine 10 is in operation, that is, when the milling is finished. 43 is communicated, and the inside of the semen chamber cover 37 is set to a negative pressure by the suction force of the dust collector 28 so as to suck out the air inside.

  Further, after the start of the scouring, the control unit 17 determines whether or not the scouring is finished based on the detection value from the rice sensor 16 and the load current value of the main motor 41 that rotationally controls the friction roll shaft 36. Then, when the rice sensor 16 detects the absence of brown rice and the load current value is equal to or less than a preset value, for example, 18 A or less in the case of a 20-horsepower rice mill, it is determined that the milling is finished. Is set in advance. When the control unit 17 determines that it is time to finish the sperm, the control unit 17 is preset so as to automatically end the sperm and controls the air actuator 46 so that the open / close shutter 45 is lowered to control the duct. 43 is set so as to block the suction force of the dust collector 28.

  Further, as shown in FIGS. 6 and 7, the upper surface portion of the semen chamber cover 37 is configured to allow air to be taken into the semen chamber cover 37, which has a negative pressure when the dust collector 28 is in operation. The intake ports 37a are provided in a row. A closing device 51 as a closing means that can open and close these intake ports 37 a is provided on the upper surface of the sperm chamber cover 37. Openings 52a having the same diameter as the air inlets 37a are formed in a row in the closing device 51 in the same manner as the semen chamber cover 37, and along the upper surface of the semen chamber cover 37 as shown in FIG. A plate-like slide shutter 52 that closes the intake port 37a by shifting the opening 52a from the intake port 37a when sliding is slidably contacted, and a solenoid 53 that moves the slide shutter 52 forward and backward in the longitudinal direction of the body. It is prepared for. The solenoid 53 is driven and controlled by the control unit 17, and the rod portion 53 a that extends in a state of being connected to the rear portion of the slide shutter 52 moves forward and backward in the longitudinal direction of the machine body, thereby moving the slide shutter 52 forward and backward. It is designed to move.

  Then, the control unit 17 drives and controls the solenoid 53 so that the slide shutter 52 is fixed at the retracted position when the rice milling machine 10 is operating, that is, in a state different from the end of milling. The opening 37 a is fully opened, and the suction force of the dust collector 28 is set so that air is sucked into the semen chamber cover 37. Further, when the control unit 17 determines that it is at the end of the precision by using the same method as described above, the control unit 17 controls the solenoid 53 so that the slide shutter 52 slides toward the front of the machine body, thereby controlling the opening 52a. The intake port 37a is set to be fully closed by shifting from the intake port 37a.

  As described above, according to the present invention, the control unit 17 of the rice milling machine 10 detects the absence of brown rice passing through the inlet 15 by the rice sensor 16, and the load current value of the main motor 41 is preset. When the set value is less than or equal to the set value, it is determined that the fine adjustment is finished. And the control part 17 which judged that it was the time of completion | finish of a milling spouts the compressed air from the 1st and 2nd blowing apparatus 13,13 'toward the residual rice in the frictional milling chamber 32, and The sliding shutter 52 is slid to block the intake port 37a of the semen chamber cover 37, and the open / close shutter 45 is moved downward to shut off the frictional semen chamber 32 and the dust collector 28. As a result, the suction force of the dust collector 28 is cut off, so that there is no sticking of the residual rice to the scouring net 34 of the frictional scouring chamber 32, and the residual rice can be easily moved. The compressed air blown from the second blowing device 13, 13 ′ is prevented from escaping from the air inlet 37 a of the semen chamber cover 37 or sucked into the dust collector 28, so that the residual rice is discharged from the white rice. It becomes possible to blow away toward the discharge port 38 connected to the outlet 54 (shown in FIGS. 1 and 2). As a result, it is possible to provide the rice mill 10 capable of discharging residual rice by a blast of compressed air without stopping the operation of the dust collector 28.

  In addition, this invention is not applied only to the rice milling machine provided with the horizontal type | mold 2 axis | shafts milling room, It is applied also to the bowl type rice milling machine which passes brown rice to a milling room toward the upper direction from the downward direction. be able to.

1 is a front view of a rice mill to which the present invention is applied. It is a schematic diagram of the rice mill in the same example. It is a side view of the friction type semen chamber in the example. It is a front view of the friction type precision machine part in the example. It is a disassembled perspective view of the interruption | blocking apparatus in the example. It is a side view of a semen chamber cover in the same example. It is a top view of a sperm chamber cover. It is a top view of the sperm chamber cover by which the inlet port was obstruct | occluded by the interruption | blocking part.

DESCRIPTION OF SYMBOLS 10 Rice milling machine 11 Grinding type rice milling machine part 12 Friction type rice milling machine part 13
15 Input 16 Rice sensor (rice detection means)
17 Control unit (control means)
28 Dust collector (dust collection means)
32 Friction type semen room (sperm room)
34 Sewing net 35 Friction roll
36 Friction roll shaft 37 Sperm chamber cover 37a Inlet 41 Main motor (drive source)
44 Blocking device (blocking means)
45 Opening / closing shutter 46 Air actuator 51 Closure device (blocking means)
52 Slide shutter 53 Solenoid

Claims (1)

A pearling chamber cover inlet is provided with accommodating the pearling rolls and pearling network rotatable cutting the bran layer of the surface of brown rice, pre SL communicates with the inside pearling chamber cover, the bran scraped away from the surface of the brown rice In a rice mill comprising dust collecting means for sucking and squirting means for squirting compressed gas to the residual rice in the milling chamber formed by the milling roll and the milling net at the end of milling,
A closing means for closing the suction port of the semen chamber cover at the end of the semen, and a blocking means for blocking between the semen chamber and the dust collecting means,
It is determined whether or not the milling is finished based on the detection value from the detection means for detecting the presence or absence of brown rice passing through the inlet connected to the milling room, and the load current value of the driving source that rotates the milling roll, When the detection means detects the absence of brown rice and the load current value is equal to or lower than a preset value, it is determined that the finishing of the milling is completed, and the inlet of the milling chamber cover is closed by the closing means. A rice mill is provided with a control means for shutting off between the milling chamber and the dust collecting means by the shut-off means.

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