JP2005305246A - Rice polishing gap control device of rice polishing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To always adjust and hold a rice polishing gap part to a proper state in a rice polishing machine constituted so as to supply cleaned rice to the rice polishing gap part between relatively rotated inner and outer cones each having a foamed resin material provided to the inside and outside opposed rotary peripheral surfaces thereof to polish the same. <P>SOLUTION: In the rice polishing machine constituted so as to supply cleaned rice to the rice polishing gap part between the relatively rotated inner and outer cones each having the foamed resin material provided to the inside and outside opposed rotary peripheral surfaces thereof to polish the same, the either one of the inside and outside cones 1 and 2 is moved along the direction of the cone axis thereof to constitute the rice polishing gap part alterably, and the gap contracting control in the contracting direction of the rice polishing gap part is performed by the integration of the supply amount of cleaned rice or a rice polishing operation time. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a rice polishing machine that is formed between a pair of inner and outer cones that are polymerized inward and outward, and that polishes rice by supplying white rice. The present invention relates to a grinding machine gap control device for a grinding machine.

In a rice polishing machine that grinds rice grains by rotating the inner cone while feeding and flowing white rice grains into the gap between the inner cone and the outer cone having brushes on the inner and outer rotating peripheral surfaces. The inner and outer cones are provided so as to be relatively movable along the direction of the cone axis, and the balance between the pressing biasing force toward the approaching side and the biasing force toward the separating side is adjusted. A technique (for example, see Patent Document 1) that can arbitrarily change and adjust the contact pressure of the brush is known.
JP-A-8-141417 (page 4, FIG. 1).

  In a rice polishing machine that supplies white rice to the gap between the outer cones and has a foamed resin material on the rotating peripheral surfaces facing the inner and outer sides, and rotates the inner cone, these inner and outer cones When the foamed resin material layer on the facing surface is worn and the gap between the polished rice is greatly opened, the polishing effect is reduced. In addition, when the contact frequency between the foamed resin materials is large, wear is accelerated. For this reason, this sharpening gap is always adjusted and maintained in an appropriate state. Accurate gap reduction control can be achieved with a simple structure without the complicated structure of direct measurement of the sharpening gap or operation. It is what makes you do.

  According to the first aspect of the present invention, the white rice is supplied to the polished rice gap between the inner cone 1 and the outer cone 2 which have the foamed resin materials 65 and 63 on the rotation peripheral surfaces facing the inner and outer sides and rotate relative to each other. In the rice polishing machine that grinds, the inner and outer cones 1 and 2 are moved along the direction of the cone axis 4 so that the sharpening gap can be changed, and the sharpening gap is reduced. The gap reducing control in this direction is performed by integrating the supply amount of white rice or the rice polishing operation time. When white rice is supplied from the upper side to the polished rice gap between the foamed resin materials 65 and 63 on the opposed peripheral surfaces by relatively rotating the inner and outer cones 1 and 2, polishing between the foamed resin materials 65 and 63 is performed. Under the action, the peripheral surface of the white rice is polished and discharged from the lower end of the gap between the polished rice. At this time, every time the accumulated supply amount or the rice polishing operation time reaches a certain amount or a certain time while integrating the supply amount of the white rice or the rice polishing operation time to the gap between the rice polishing, The cones 1 and 2 on either side are moved and adjusted in the direction of the cone axis 4 so as to reduce the grinding gap and maintain and control it to a substantially constant optimum grinding gap at all times.

  According to the second aspect of the present invention, the white rice is supplied to the polished rice gap portion between the inner cone 1 and the outer cone 2 which have the foamed resin materials 65 and 63 on the rotation peripheral surfaces facing the inner and outer sides and rotate relative to each other. In the rice polishing machine for polishing, the inner and outer cones 1 and 2 are moved along the direction of the cone axis 41 so that the polishing gap can be changed. According to the relationship between the clearance of the polishing pad and the load of polishing, the initial clearance is set as the initial clearance during the next polishing operation. When white rice is supplied from the upper side to the polished rice gap between the foamed resin materials 65 and 63 on the opposed peripheral surfaces by relatively rotating the inner and outer cones 1 and 2, polishing between the foamed resin materials 65 and 63 is performed. Under the action, the peripheral surface of the white rice grains is polished and discharged from the lower end of the gap between the polished rice. When the rice polishing operation is finished, the relationship between the gap of the rice polishing gap and the load of the rice polishing is recorded in the memory. When the next polishing operation is resumed, the initial gap is set based on the recorded data, and the subsequent polishing gap control is performed starting from the initial gap.

  According to the first aspect of the present invention, the amount of white rice supplied to the grinding gap between the inner and outer cones 1 and 2 and the integration of the operating time and the like are obtained. Since the gap is controlled to be reduced, polishing unevenness and poor polishing accuracy can be eliminated. Also, the configuration can be simplified.

  In the invention according to claim 2, during the rice polishing operation, the relationship of the rice polishing gap with respect to the load detection during the previous operation is stored, the initial gap is set by this relationship, and the rice polishing operation is simplified. Can be facilitated. Further, when the operation is resumed, the initial gap often changes greatly due to maintenance or the like, but accurate and quick operation can be performed regardless of such maintenance operation or the like.

  The rice polishing machine is composed of a gantry 3 having a cubic outer frame and a pivot frame 5 attached to and detached from the upper frame. Inside the outer frame, an inner cone 1, an outer cone 2, and an inner cone A motor M for driving and rotating 1, a lifting frame 10 that moves up and down while supporting the outer cone 2, and a screw shaft 13 that drives the lifting frame 10 to move up and down are disposed. Among these, a vertical conical shaft 4 is mounted at the center of the gantry 3 and is transmitted and rotated by the motor M. A disc-shaped turntable 9 is provided on the conical shaft 4, and a paragraph-shaped rice receiving shelf 8 is formed on the outer periphery. The bottom surface of the inner cone 1 is placed on the top surface of the turntable 9 and is attached in a detachable manner by tightening bolts 14 or the like.

  The inner cone 1 has a conical shaft 4 at the center, and a foamed resin material 65 layer made of melamine foamed resin as an abrasive is laid on the outer peripheral surface of a sheet metal cone. A cutout plate is used for the cone of the inner cone 1 and suction air is applied to the inner conical chamber 15 so that a part of the porridges interposed in the pores of the abrasive can be removed by suction. An auger shaft 16 having an auger 7 formed along the extension of the cone shaft 4 is detachably connected to the top of the inner cone 1. A screw shaft 42 at the upper end of the conical shaft 4 is formed at the top of the inner cone 1, and a lower socket 18 is formed on the outer peripheral portion of the spline 17. A spacer 21 for fitting the spline 17 is superposed on the upper side, and an upper socket 19 is fitted to the lower end of the auger shaft 16 from the upper side. The screw portion 20 at the center of the upper socket 19 is connected to the screw shaft 42. It can connect by screwing together (FIG. 5).

  The outer cone 2 is made of substantially the same material as the inner cone 1 and is fitted to the outer peripheral portion of the inner cone 1 so that the inner peripheral surface is formed in parallel with the outer peripheral surface of the inner cone 1. It is said. The melamine foam resin material 63 layer is formed thicker than the melamine foam resin material 65 layer of the inner cone 1. A cylindrical chamber 25 is formed on the outer periphery of the outer cone 2 by being covered with an outer cylinder 24. A part of the polished rice cake can be sucked and removed into the cylindrical chamber 25 through the outer cone 2 and can be sucked and discharged out of the machine from the removal port 26 formed at the bottom. The outer cylinder 24 is integrated with the outer cone 2, but guide plates 27 and 28 supported and guided by free bearings 11 and 12 disposed on the elevating frame 10 are formed above and below the outer cylinder 24. The lower end edge 52 of the hopper 6 fitted to the outer peripheral portion of the auger 7 is connected to the upper end portion of the outer cone 2 by tightening bolts 53 or the like. A fixed gap 30 is formed between the lower edge 52 of the hopper 6 and the upper edge 29 of the outer cone 2 with a spacer or the like interposed between the upper cover 31 of the elevating frame 10 and the gap 30. The hole edge 32 is intervened.

  The elevating frame 10 supports the outer cone 2 and the outer cylinder 24 rotatably by free bearings 11 and 12. The outer cylinder 24 is configured so as to surround the outer peripheral portion in a box shape, and can be moved up and down along the inner side of the outer frame 3, the shaft support frame 5, and the like. The upper cover 31 of the upper part is integrally formed by fastening bolts 33 at the four corners, and the free bearing 11 is disposed on the lower surface of the upper cover 31. In addition, a suction port 34 communicating with the removal port 26 of the cylindrical chamber 25 is disposed on the outer periphery of the lower portion, and a flange 35 is formed on the inner periphery of the lower end. The flange 35 has a free bearing 12 and four corners. The elevating screw shaft 13 is inserted through the outer cone 2 at the outer region of the outer cone 2. In addition, a nut seat 36 that is screwed to each screw shaft 13 is fixed to the upper portion of the lift frame 10, and the nut seat 36 is moved up and down by the rotation of each screw shaft 13, so that the lift frame 10 is lifted and lowered. The The lower end portion of each screw shaft 13 is supported by the bracket 37 of the gantry 3 through a thrust bearing or the like. Further, a sprocket 38 is provided at the lower end of each screw shaft 13 and is wound by a chain 41 driven by a control motor M2 for reducing the forward rotation gap and a control motor M3 for increasing the reverse gap. Driven by rotation.

  A bearing metal 39 is provided at the center of the shaft support frame 5 and is fitted to the upper end of the auger shaft 16 so that the auger shaft 16 is rotatably supported. The bearing frame 5 can be attached to the gantry 3 by tightening bolts 40. Further, the bearing frame portion 43 at the upper end portion may be attached by tightening bolts 44. A step 54 is provided on the gantry 3 and is used as a scaffold when the hopper 6, the auger 7, the outer cone 2, the lifting frame 10, the inner cone 1 and the like are attached and detached. Handles 45, 46, 47 are provided on the upper side of the bearing frame portion 43, the upper cover 31, the guide rail 27, etc. to facilitate handling.

  The gantry 3 is provided with a polished rice outlet 48 facing the outer periphery of the rice receiving shelf 8. A storage chamber 49 is formed on the lower side of the turntable 9, and the suction chamber 51 communicated with the suction machine 50 can be sucked and removed.

  The polished rice is supplied to the hopper 6, the inner cone 1 and the auger 7 are rotated by the motor M, and the suction machine 50 is driven. The white rice is fed between the inner cone 1 and the outer cone 2 by the auger 7 and flows down from the lower end to the rice receiving shelf 8 while being polished. The polished rice is taken out from the rice rack 8 to the outlet 48 on the outer periphery. Some of the soot and fine dust generated during the polishing process are leaked through the inner cone 1 and the outer cone 2 to the conical chamber 15 and the cylinder chamber 25 on the back side. It is sucked or discharged to the outlet 34. During this grinding operation, when the grinding resistance is large, the outer cone 2 is rotatably provided, so the free bearings 11 and 12 and the guide plates 27 and 28 between the lifting frame 10 It is guided and rotated around the conical axis 4. Further, the hopper 6 integrated therewith is also rotated.

  Further, when adjusting the polishing interval, the nut seat 36 is moved up and down by synchronously rotating the screw shafts 13 and the elevating frame 10 is adjusted up and down, so that the interval portion between the outer cone 2 and the inner cone 1 is adjusted. The degree of polishing can be adjusted by adjusting the width to narrow or wide.

  In assembling such a rice grinder, the bottom of the inner cone 1 is placed on the turntable 9 and attached with bolts 14. Next, the elevating frame 10 is fitted from the upper side to the inner side of the gantry 3, and the lower end portion of each screw shaft 13 disposed on the elevating frame 10 is fitted and supported by a bracket 37 integral with the gantry 3. . Next, the outer cone 2 is fitted from above and superposed on the inner cone 1. At this time, the bottom guide plate 28 of the outer cylinder 24 is supported by the free bearing 12 disposed on the lifting frame 10. Next, the upper cover 31 is fitted to the upper side of the elevating frame 10 from the upper side and attached by tightening bolts 33. At this time, the free bearing 11 disposed on the lower surface of the upper cover 31 is supported on the upper surface of the guide plate 27 to guide the rotation of the outer cone 2. Next, the auger shaft 16 is attached to the upper end of the inner cone 1 by turning the upper socket 19, and the hopper 6 is attached to the upper end of the outer cone 2 with bolts 53. Then, the support arm 5 and the bearing frame portion 43 are attached, and the upper end of the auger shaft 16 is supported by the bearing metal 39. These disassembly is performed in reverse to the above procedure, and the removal of the inner cone 1 and the turntable 9 is the final step.

  Next, the grinding clearance reduction control for adjusting the clearance of the grinding gap with the inner cone 1 by raising and lowering the outer cone 2 by the rotation of the screw shaft 13 is supplied to this grinding clearance. It can be controlled by the supply amount of white rice or by the operation time for polishing this white rice. In the control block diagram (FIG. 8), on the input side of the controller 55, an automatic control switch 56, a load sensor 57, a white rice supply amount sensor 58 for integrating the white rice supply amount, a timer for integrating the operation time, etc. Operating time sensor 59, position sensor 61, reset switch 60, and the like. The automatic control switch 56 is configured so that the control mode can be switched. In the embodiment in which the control mode is changed according to the supply amount of the white rice, the automatic control switch 56 is operated to the supply amount mode side of the white rice, thereby reducing the polishing gap. It is configured to perform control automatically.

  In the embodiment in which the operation time is used, the automatic control switch 56 is operated to the operation time mode side so that the polishing gap reduction control is automatically performed. That is, according to the output from the operating time sensor 59, a predetermined grinding operation time and a rotational speed of the screw shaft 13 corresponding to the grinding clearance reduction amount are stored in a relationship table or a relationship graph. In this configuration, the screw shaft 13 is rotated at every rice operation time to obtain a predetermined grinding gap.

  Further, when the automatic control switch 56 is operated in the supply amount mode, the following control is performed. That is, a white rice supply amount sensor 58 for detecting the amount of white rice supplied to the hopper 6 is provided, and this supply amount sensor 58 is configured to detect the amount of white rice M fed by the auger 7. In this configuration, the relationship between the amount of white rice and the rotational speed of the screw shaft 13 is stored in a relationship graph or a relationship graph, whereby the screw shaft 13 is rotated for each predetermined amount of white rice to obtain a predetermined grinding gap. In addition, it can also be set as the form input into the controller 55 by the measurement when measuring the amount of white rice supplied to this hopper 6 beforehand, or the input setting of the supply amount based on this measurement. Furthermore, when it is set as the form which detects simultaneously by both of these supply amount sensors 58 and the rice polishing operation time sensor 59, the operation time which is substantially polished can be detected correctly.

  The load sensor 57 includes a brake edge 22 formed on a guide plate 27 integral with an outer cone 2 attached to the inner cone 1, and a brake shoe 23 that holds and brakes the brake edge 22 to the lifting frame 10. It is set as the form provided in. By pressing the brake shoe 23 against the electromagnetic brake edge 22, this current value is detected and used as the detected value of the grinding load between the inner and outer cones 1, 2. In addition, it is possible to adopt a configuration in which the polishing load is detected by the power consumption value of the motor M that drives the conical shaft 4 and the polishing load sensor 57 such as a torque sensor provided on the conical shaft 4 or the like. The position sensor 61 is attached to an elevating frame 10 that moves up and down, and detects an elevating position with respect to a position marker 62 integral with the screw shaft 13 rotated by the control motor M2 or M3. It is possible to detect the vertical movement position of the outer cone 2 with respect to the inner cone 1 rotating at. The reset switch 60 resets the integration by the white rice supply amount sensor 58 and the rice polishing operation time sensor 59, and the rice polishing operation is interrupted unless the integration amount and the integration time are canceled by the operation of the reset switch 60. , Or continued with or without a stop.

  Further, on the output side of the controller 55, the clearance adjustment control motors M2 and M3 interlocking with the screw shaft 13 are provided, and when the control motor M2 is driven, the outer cone 2 is brought closer to the inner cone 1 to control the motor. In the driving of M3, it is configured to separate them. The controller 55 has an arithmetic unit that integrates the detection amount by the white rice supply amount sensor 58 and the detection time by the rice polishing operation time sensor 59, and supplies the white rice supply amount or the rice polishing operation time to the polishing rice gap. The relationship between X and the wear amount Y of the foamed resin materials 65 and 63 of the inner and outer cones 1 and 2 is obtained as a characteristic curve L or the like by test data, and a characteristic curve L indicating this relationship is set and stored. .

  As a result, the motor M is driven by turning on the supply amount mode or the operation time mode of the control switch 56, and the inner cone 1 is rotated. In this state, white rice is supplied to the hopper 6 for polishing. The white rice supplied to the hopper 6 is fed into the grinding gap by the rotation of the auger 7 and polished by the foamed resin materials 65 and 63 of the inner and outer cones 1 and 2. The foamed resin materials 65 and 63 are abraded by such a polishing action, and the gap between the polished rice gaps tends to increase. However, when in the supply amount mode, the supply of white rice proceeds and the supply amount is integrated. When X increases, the gap adjustment motor M2 is driven in accordance with the wear amount Y according to the characteristic curve L by this supply amount integration X, and the outer cone 2 is moved downward to bring the grinding gap to the reference position. maintain. In the operation time mode, the gap adjustment motor M2 is driven according to the wear amount Y according to the characteristic curve L in the same manner as described above by the accumulated operation time X of the rice polishing, and the outer cone 2 is moved downward. It is moved to maintain the grinding gap in the reference position. The white rice supply amount mode and the operation time mode are selectable, but it is also possible to adopt a specification form in which only one of these modes can be controlled.

  The gap reduction control of the grinding gap portion during the grinding operation is continuously performed by integrating the grinding supply amount and the grinding operation time regardless of the interruption or stoppage of the work. During the rice driving action, the load sensor 57 detects the grinding load X2, and the position sensor 61 detects the vertical movement position of the outer cone 2. The rice load X2 and the grinding gap are detected. The relationship with the gap Y2 is stored in the controller 55 as the control position P on the characteristic curve L2 at the same time that the operation is interrupted or stopped. Then, when the next rice polishing operation is performed after the stop of the rice polishing work, during this time, all of the rice from the previous rice polishing has been taken out and discharged from the gap between the rice polishing, and There may be a large change in the gap between the polished rice due to maintenance, etc. In such a case, supply white rice to the gap between the polished rice for the next time and wait for the increased load on the polishing. Then, in accordance with the characteristic curve L2 of the relationship between the polishing load X2 and the gap Y2 recorded in the previous time, the initial polishing operation clearance control for reaching the previous storage control position P is performed. When the outer cone 2 is controlled to the previous control position P by this initial rice control operation gap control, the rice control is automatically performed according to the characteristic curve L.

  A cylindrical and hard polyethylene resin layer 64 is fitted to the inner peripheral surface of the melamine foaming resin material 63 of the outer cone 2 at the upper end of the polished rice gap between the inner cone 1 and the outer cone 2. The polishing effect is enhanced between the inner periphery of the polyethylene resin layer 64 and the melamine foam resin material 65 layer of the inner cone 1. A foamed resin material 65 layer is laid on the outer peripheral surface of the inner cone 1, and a foamed resin material 63 layer is laid on the inner peripheral portion of the outer cone 2. The upper end portion is tapered in cross section, and the upper end portion is a thin layer. Is formed. The hard polyethylene resin layer 64 fitted inside is cylindrical and has a thin lower end. A white rice grain supply interval 66 is formed between the hard polyethylene resin layer 64 and the inner foamed resin material 65 layer. Although the abrasive is easily worn at the white rice grain supply port, the hard polyethylene resin layer 64 reduces the friction between the 63 layers of the melamine foaming resin material 63 and the durability of the melamine resin layer. it can.

  As the load sensor 57, as shown in FIGS. 9 and 10, a brake mechanism having a variable braking force for driving and braking the brake control motor M4 by a pulse output is provided, and a braking force that does not stop the rotation of the outer cone 2 is provided. By applying, it is possible to know whether the polishing load is increased or decreased in the gap between the polished rice. If the rotational speed of the outer cone 2 at the operating rotational speed (or the operating cumulative time) is within a predetermined range set in advance, the result is OK, and the braking force is adjusted to be outside this range (FIG. 10). A follow-up occurrence rate n / N is calculated from a follow-up rotation speed n of the outer cone 2 at a specified operation speed N of the inner cone 1, and this is calculated as a reference occurrence rate upper limit Hu and a reference occurrence rate lower limit Hi. Whether it is within the range or out of the range is determined, and if it is out of the range, the braking force is controlled by pulse output. For example, when the rotation speed n of the outer cone 2 is set as a reference for the operation speed N = 30 of the inner cone 1 as a reference, the rotation of the operation speed 30 times is accompanied by one rotation. When there is no turning, the brake is overtightened. If an overload is applied in this state, it is estimated that the melamine foam resin materials 65 and 63 may be damaged, and the braking force is weakened by one pulse. On the contrary, when the accompanying rotation occurs more than 2 times during the operation speed of 30 times, it is controlled that the braking force is strengthened on the assumption that the grinding performance is lowered because the breaking force is weak.

  In the form in which the outer cone 2 is lowered to narrow the grinding gap, if the grinding gap becomes narrower than a certain level, the inner and outer cones 1 and 2 are excessively contact-frictioned, and foaming between the inner and outer cones 1 and 2 occurs. The resin materials 65 and 63 may be destroyed, the brake itself may be locked, or the brake hand 67 that supports these brake shoes 23 may be destroyed. Therefore, the brake control motor M4 is driven by a pulse output, the brake shaft 68 is rotated by a forward and reverse screw, and the brake hand 67 that is screwed is moved so as to be attracted thereto, so that the brake shoe 23 is moved to the brake edge 23. Approach the upper and lower surfaces. This braking force is applied in an adjustable manner by a pulse output, and can be applied to such an extent that the braking force does not stop during normal rice polishing operation. In this way, when the polishing operation is performed by applying a braking force that is variable in braking force and necessary for the polishing operation and that does not stop and lock, the outer cone 2 can resist the braking force even if a sudden load occurs. Rotation of the inner cone 1 can be caused by rotation of the inner cone 1 due to the grinding resistance, and there is no fear of frictional damage of the foamed resin materials 65 and 63 in the gap between the polished rice.

  A brake stopper 69 is provided between the brake hands 67 to prevent the brake gap from becoming narrower than a certain value. The brake stopper 69 is provided with a reference position sensor 70 made of an optical sensor. Since there is a strong correlation between the number of pulses from this reference position and the braking force, the reference position of the brake by this reference position sensor 70 is determined, and the braking force is variably controlled based on the number of pulses from this position. The configuration. Also, a position indication marker is provided at the joint 72 between the motor shaft 71 of the brake control motor M4 and the brake shaft 68, and this marker is a gap position formed by an optical sensor integrated with the lifting frame 10 on the outer cone 2 side. It is detected by the sensor 73 and controlled to change the braking force based on this detection. With such a configuration, since the sudden stop of the outer cone 2 is eliminated, it is difficult to destroy the foamed resin materials 65 and 63, and brake control can be performed easily and inexpensively.

  FIG. 11 shows the mounting and fixing of the upper end portion of the foamed resin material 63 laid inside the outer cone 2. As a form in which the resin cylinder 75 with the flange 74 is fitted, the resin cylinder 75 and the outer cone 2 are fitted. Between the upper end edge of the outer cone 2 and the flange 74 of the resin cylinder 75. The upper end edge 79 of the foamed resin material 63 is held between the upper end edge of the outer cone 2 and the flange 74 of the resin cylinder 75. In addition, the ring plate 76 is further superposed on the upper side, and bolts 77 are inserted between them to be fastened and fixed. The resin cylinder 75 and the ring plate 76 are formed with a supply port 78 for allowing the white rice to flow down from the hopper 6. Further, by removing these bolts 77, the fixing of the upper end portion of the foamed resin material 2 can be easily released.

  Further, at the lower end portion of the outer cone 2, the lower end edge portion 81 of the foamed resin material 63 is superposed under the lower end edge portion 80 of the outer cone 2, and a ring plate 82 is further overlapped on the lower side, thereby overlapping these superposed portions. The bolt 83 is inserted and fixed between them. The inner peripheral portion of the ring plate 62 is bent upward and is formed in a cone shape having an inclined surface that is slightly looser than the inclined surface of the outer cone 2, so that the foamed resin material 63 can be easily pressed and fixed.

  FIG. 12 discloses a configuration for preventing unevenness of polishing in the initial stage of polishing. As described above, in the initial stage of the rice polishing operation, the polishing gap A between the inner and outer cones 1 and 2 is adjusted, but the supply filling rate to the polishing rice gap A portion of the white rice is low and does not receive sufficient polishing. It is likely to cause unevenness of polishing rice, such as being discharged as it is. Therefore, when white rice is supplied to the polished rice gap A part between the inner and outer cones 1 and 2, an opening / closing ring 86 that can be moved up and down is provided at the discharge port 85 part at the lower end of the polished rice gap A part at the initial stage of the polishing work. Then, the open / close ring 86 is moved up B to close the discharge port 85, and in this state, white rice is supplied to the polished rice gap A. Then, the inner cone 1 is driven and rotated by the polishing rice motor M to perform the rice polishing action, and batch processing is performed. When this rice polishing action is performed, the opening / closing ring 86 is lowered C to open the discharge port 85 to allow the rice polishing rice to flow down and discharge, thereby allowing normal rice polishing operation.

  Next, FIG. 13 shows an improvement of the free bearing. That is, a spring 87 is provided on the free bearing 11 of the elevating frame 10 that is rotatably supported on the upper surface of the guide plate 27 of the outer cylinder 24 on the outer cone 2 side, and the free bearing 11 can be moved up and down to move downward. The raising and lowering frame 10 that is elastically supported by the outer cone 2 so as to rotate freely is configured to be movable in the vertical direction in response to sudden load fluctuations. The polishing process is performed in a fixed polishing gap in which the clearance is adjusted. At this time, the load may suddenly fluctuate due to a change in the flow rate of the supplied white rice, mixing of foreign matter, or the like. At this time, even if the elevating frame 10 of the outer cone 2 is driven up by the drive of the control motor M3 to reduce the load, it is difficult to instantaneously follow the fluctuation of the load. However, it is possible to cope with sudden load fluctuations with a simple configuration in which the spring 87 is provided on the free bearing 11 as described above. The spring 87 is fitted in a bearing holder 88 that fits the free bearing 11 so as to be movable up and down. 89 is a bearing ball. Reference numeral 90 denotes a mounting flange for attaching the free bearing 11 to the upper cover 31.

  Next, the structure of the suction and discharge of the removal will be described with reference to FIG. An air flow meter 91 by a suction device 50 is provided in a suction passage 51 leading to the conical chamber 15 of the above-described polishing apparatus, the suction chamber 34 of the storage chamber 49, the cylinder chamber 25, and the like. If the air flow decreases, it is judged that the amount of soot on the foamed resin materials 65 and 63 of the inner and outer cones 1 and 2 is large, and a warning is given as a time for maintenance or replacement of the foamed resin materials 65 and 63, or The suction machine 50 is driven to control the foamed resin materials 65 and 63 to be cleaned. In this way, when the soot adheres to the foamed resin materials 65 and 63, the amount of air sucked by the suction device 50 decreases, so that the degree of soot adhesion can be determined, and the function of the clogging sensor for the foamed resin materials 65 and 63 can be achieved. it can. As a result, warning or cleaning can be performed.

Front view of the Kenken machine. The partial development front view. The plan view. FIG. Sectional drawing of the auger shaft connection part. The perspective view of the outer cone up-and-down movement adjustment drive part, and a top view. The expanded sectional view of the supply part of the polished rice gap part, and the perspective view of the part. The block diagram of the sharpening gap reduction control part and the sharpening gap initial control part. The perspective view of the load sensor part. The flowchart of the brake control. Sectional drawing which shows the attachment state of the outer cone part which concerns on an another Example, and a perspective view of the part. FIG. 5 is a front sectional view showing an operating state of a polished rice gap discharge port part of another embodiment. Sectional drawing of the free bearing part which shows another Example. Explanatory drawing of the removal control which shows an another example.

Explanation of symbols

1 Inner cone 2 Outer cone 55 Controller 57 Load sensor 58 White rice supply sensor 59 Operating time sensor 61 Position sensor 63 Foamed resin material 65 Foamed resin material M2 Control motor (for gap reduction)
M3 control motor (for gap expansion)

Claims (2)

  In the rice polishing machine for polishing rice by supplying white rice to the polishing rice gap between the inner cone 1 and the outer cone 2 which have the foaming resin materials 65 and 63 on the rotating peripheral surfaces facing the inside and outside, and the relative rotation, The inner and outer cones 1 and 2 are moved along the direction of the conical axis 41 so that the sanding gap can be changed. The grinding gap control device is characterized in that it is performed by integrating the supply amount of rice or the grinding time.   In the rice polishing machine for polishing rice by supplying white rice to the polishing rice gap between the inner cone 1 and the outer cone 2 which have the foaming resin materials 65 and 63 on the rotating peripheral surfaces facing the inside and outside, and the relative rotation, The inner and outer cones 1 and 2 are moved along the direction of the conical axis 41 so that the grinding gap can be changed, and the relationship between the previous grinding gap and the grinding load. Is set as an initial gap during the next rice polishing operation.

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