JPH04277036A - Driving control apparatus of vertical dry rice polishing apparatus - Google Patents

Abstract

PURPOSE:To prevent the cracking of residual rice due to the remaining heat of a rice polishing machine by wholly returning residual rice to a receiving chamber from a rice polishing chamber by reversing an electromotor for a predetermined time after the completion of rice polishing. CONSTITUTION:An inner cylinder and an outer cylinder 60 forming a rice polishing chamber are arranged in a receiving chamber temporarily receiving polished rice in a relatively revolvable manner in an up-and-down direction to constitute a vertical rice polishing machine M. A slit group performing the grinding and germ removal treatment of polished rice while guiding the polished rice introduced from the receiving chamber from the lower part of a rice polishing chamber to the upper part thereof at the time of the relative revolution of the inner and outer cylinders 60 is provided to the rice polishing chamber. A forward rotation command means 104 rotating the electromotor driving the rice polishing machine M in a rice polishing direction and a reversal command means 106 rotating the electromotor in the direction reverse to the rice polishing direction for a predetermined time after the completion of rice polishing are provided. As a result, residual rice can entirely be returned to the receiving chamber from the rice polishing chamber after the completion of rice polishing and the cracking of residual rice due to the remaining heat of the rice polishing machine can be prevented.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control device for a vertical dry rice polishing apparatus for polishing rice in a dry state without using water.

0002

2. Description of the Related Art An example of a dry rice polishing device for polishing rice in a dry state without using water is disclosed in Japanese Patent Application Laid-Open No. 2-135153. This dry rice polishing device has an inner cylinder that serves as a polishing body and an outer cylinder that serves as a rice polishing body that are loosely fitted and arranged concentrically in a case, and these inner and outer cylinders form a rice polishing chamber. , an electric motor that drives the inner cylinder is connected in series with this, and these electric motors, the inner cylinder, and the outer cylinder are arranged horizontally. One side of the rice polishing chamber is connected to a hopper for supplying polished rice placed at the top, and the other side of the rice polishing chamber is connected to a rice delivery port to receive the measured and supplied polished rice from the hopper. The rice is ground and polished while passing through the rice polishing chamber, and all of the polished rice and polished rice in the polishing chamber are collected into a rice tray disposed below the rice delivery port.

0003

[Problems to be Solved by the Invention] As mentioned above, the conventional dry rice polishing device has a horizontal structure in which the electric motor, the inner cylinder, and the outer cylinder are arranged horizontally in series. The problem was that the space it occupied had to be large in plan view.

[0004] Furthermore, since polished and polished white rice is collected in a rice tray located below the rice delivery port, for example, dry polished rice is used to perform the subsequent rice cooking process in a series of operations. When integrating the device and the rice cooker, if you use natural fall to transfer white rice from the rice tray to the rice cooker, the entire device will become vertically long. There have been various problems, such as transporting white rice to the rice cooker is troublesome and can easily cause trouble.

[0005] Therefore, the inner and outer cylinders that make up the rice polishing chamber are made vertical, so that the polished rice is ground and polished while being transferred from the lower part of the rice polishing chamber to the upper part. A vertical structure that allows polished rice to be sent out from the rice polishing room in accordance with an externally set amount, thereby reducing the space occupied by the rice polishing device in terms of space, and making it easier to transport polished rice after grinding and polishing. A mold rice polishing device has already been proposed by the applicant.

However, in such a vertical rice polishing device, rice remains in the rice polishing chamber when the rice polishing machine is stopped. Additionally, rice polishing machines generate heat due to friction with the rice during polishing. For this reason, the rice remaining in the rice grinding chamber at the end of rice grinding is
There was a problem that cracks were caused by residual heat from the rice polishing machine.

SUMMARY OF THE INVENTION In view of the above-mentioned points, an object of the present invention is to provide a drive control device for a vertical dry type rice polishing apparatus that can prevent residual rice from cracking due to residual heat of the rice polishing machine.

[0008]

[Means for Solving the Problems] A drive control device for a vertical dry rice polishing apparatus according to the present invention has an inner cylinder and an outer cylinder loosely fitted in a storage chamber for temporarily storing polished rice so as to be relatively rotatable. These inner cylinders and outer cylinders form an annular rice polishing chamber in which the gap interval changes. A grinding machine configured to provide a group of slits for grinding and grinding rice while guiding it to the upper part of the rice grinding chamber during the relative rotation, and to send out the polished rice after grinding and grinding from the upper part of the rice grinding chamber. A rice machine, an electric motor that drives either the inner cylinder or the outer cylinder of this rice polishing machine, and an electric motor installed outside the rice polishing machine, which feeds polished rice to a set amount from the upper part of the rice polishing chamber. The measuring section outputs a measuring end signal when the set amount is reached, and the electric motor rotates in the direction of rice polishing based on the rice polishing machine operation signal from the operating section until the measuring end signal is input from the measuring section. and a reverse rotation command to rotate the electric motor in a direction opposite to the rice polishing direction for a predetermined period of time based on a rice polishing machine operation signal from the operation section and a forward rotation end signal from the forward rotation command means. It is equipped with means.

[0009]

[Function] In the present invention, the rice introduced from the storage chamber into the rice polishing chamber is moved in irregular directions and scraped by the forward rotation of the rice polishing machine, due to the change in the size of the gap in the rice polishing chamber. While being mixed, the rice is guided to the delivery side by a group of slits that perform grinding and cutting, and the rice is pushed upward as a whole. On the way up, the bran layer and germ on the surface of the rice grains are scraped off or polished by the slits that perform grinding and germ removal, or by the contact between rice grains. The white rice pushed up to the top of the rice polishing chamber while undergoing the rice polishing action is sent out from the top of the rice polishing chamber until it reaches a set amount, and when the set amount is reached, the rice polishing machine stops. After that, when the rice polishing machine shifts to reverse rotation, the remaining rice in the rice polishing chamber is guided by a group of slits that have a rice guiding function in the rice polishing chamber, and all of it is returned to the storage chamber side. A US plane stops.

0010

EXAMPLES The present invention will be explained below with reference to illustrated examples.

First, the principle of the vertical dry rice polishing apparatus of this embodiment will be explained with reference to FIGS. 2 to 9. Figure 2 is an explanatory diagram of the configuration of the vertical dry rice polishing device seen from the front side, and Figure 3 is its A.
-A sectional view. In FIG. 1, 1 is a substrate, 2 is an electric motor fixed to the substrate 1 and equipped with a speed reduction mechanism, and 3 is its output shaft. 4 is a driving pulley, 5 is a belt, and 6 is a driven pulley. The belt 5 is a timing belt that does not slip during torque transmission, and both pulleys 4
and 6 are also provided with tooth profiles corresponding to the teeth of the timing belt.

10 is the main body of the rice polishing device. Reference numeral 20 denotes a cylindrical outer case of the main body 10, which is divided into an upper case 21, an intermediate case 22, and a lower case 23. 2
Reference numeral 4 denotes a plurality of connecting fittings provided above and below the intermediate case 22, which connects the upper case 21 and the lower case 23 to the intermediate case 22.
Detachably connected to the top and bottom of. The outer case 20 is made of, for example, transparent resin, and the vicinity of the lower case 23 is fixed to the substrate 1. 25 is a plurality of support columns, and 26 is a mounting plate. The mounting plate 26 is mounted horizontally below the lower case 23 with a space provided therebetween by a support 25. 27 is a U-shaped holding frame, and 28 is a tray. The tray 28 is disposed within the holding frame 27 and collects rice bran and the like separated during the rice polishing operation described later. 31 is an annular lower bearing seat fixed to the lower case 23 and the mounting plate 26, 32 is two ball bearings, 33
is a drive shaft supported by both ball bearings 32. Drive shaft 33
A driven pulley 6 is attached to the.

Reference numeral 41 denotes an inclined ring fixed downwardly within the intermediate case 22, and on its upper surface, rice in a storage chamber formed between the intermediate case 22 and an outer cylinder 60, which will be described later, is tilted toward the center of the ring due to its own weight. An inclined surface 42 is provided which is set at an angle of inclination sufficient for sliding down. 43 is a flanged surface bearing, and 44 is a driven shaft. The driven shaft 44 is supported by a surface bearing 43 and connected to the drive shaft 33.

Reference numeral 51 designates an upper bearing seat provided in the upper case 21, 52 a surface bearing, 53 a dust seal, and 54 an annular shaft supported by the surface bearing 52. Further, 55 is a top plate fixed to the upper case 21, 56 is a rice input path, and 5
7 is an outlet. The upper and lower ends of the driven shaft 44 and the annular shaft 54 have a hexagonal inner surface to match the outer shape of the outer cylinder 60, and a circular outer peripheral surface to correspond to the surface bearings 43 and 52. 44 see Figure 3).

Reference numeral 60 denotes an outer cylinder, and 70 denotes a cylindrical inner cylinder disposed inside the outer cylinder 60 in the direction of its axis X--X. An annular shaft 54 and a driven shaft 44 are fitted and integrally attached to the upper and lower ends of the outer cylinder 60, and are rotatably supported within the outer case 20 by surface bearings 52 and 43. 63 is the driven shaft 4
These are intake ports provided at multiple locations in the circumferential direction in the upper part of 4.

[0016] Reference numeral 71 denotes a slit that penetrates the inside and outside of the inner cylinder 70. The slit 71 is located approximately 90 mm in the middle of the cylindrical portion of the inner cylinder 70.
Divided into four groups arranged in the axis X-X direction at intervals of degrees,
As shown in FIG. 4, the slits 71 of each group are provided at an angle θ (in the embodiment, θ is approximately 25 degrees) with respect to the diametrical direction. Further, the groove width Ws of the slit 71 is smaller than the thickness Wr of the thinner side of the rice grain and has a width Ws<Wr, so that the opening edge 73 is not chamfered but has a pointed angle so that the rice grain does not pass through the slit 71. (Figure 8
, see Figure 9). Among the many slits 71 provided in the vertical direction of the cylindrical portion of the inner cylinder 70, the slit 71 in the upper layer is provided with germ removal claws 72 as shown in an enlarged view in FIG. The tip of the germ removal claw 72 forms an arcuate blade,
This blade portion projects obliquely to the outside of the inner cylinder 70.

Reference numeral 73 denotes a mesh formed in the upper part of the inner cylinder 70. The mesh 73 has a thickness of 0.5φ and a width of 13
．． It is made by knitting about four thin metal wires such as stainless steel into a net shape, and is made into a "Yatsuhashi" shape with circular arc surfaces on strips. It is provided on the periphery. 74 is a fixing plate fixed to the upper end of the inner cylinder 70, and 75 is a fixing screw. The fixing plate 74 is fixed to the top plate 55 by fixing screws 75, and functions to restrict free rotation of the inner cylinder 70 (see FIG. 6).

76 is a spiral. spiral 76
is formed in the middle of the inner cylinder 70 to face the intake port 63, and is for guiding the rice that has slid down on the inclined surface 42 of the inclined ring 41 and taken in from the intake port 63 toward the delivery port 57 side. . The inner cylinder 70 in which the slits 71, the mesh 73, etc. are formed is set to be longer than the outer cylinder 60 on the outside, and is suspended from the top plate 55, with the driven shaft 44 and the drive shaft 3 in the middle.
The lower end is exposed inside the holding frame 27 through the hollow part 3.

12 is polished rice before being polished, 13 is polished rice that has been polished using a rice polishing device, and 15 is rice bran that contains germ powder, dust, etc. mixed in the polished rice, and is mainly composed of bran. It is separated from polished rice 12 by rice grinding. 16 is the germinal pore.

[0020]The annular space formed between the outer case 20 and the outer cylinder 60 has a storage chamber R1 for temporarily storing polished rice to be polished, and a hexagonal outer cylinder 60 and a circular inner cylinder 70. The annular gap between them constitutes a rice polishing chamber R2, and the internal space of the inner cylinder 70 constitutes a recovery duct R3 for recovering the bran 15 separated from the polished rice 12. Based on the experimental results, the maximum value Lm and minimum value Ln of the gap in the direction orthogonal to the axis X-X of the rice polishing room R2 are Lm≦2Lr and Lr, respectively, where Lr is the length of an ordinary rice grain. It is selected such that it falls within the range of ≧Ln (FIGS. 7 and 8).

The rice polishing operation of the vertical dry rice polishing apparatus having such a configuration will be explained with reference to FIGS. 2 to 9.

First, the polished rice 12 is charged into the storage chamber R1 from the input path 56 of the upper case 21, and the polished rice 12
It is accumulated and stored from 2. A part of the polished rice 12 put into the storage chamber R1 slides down on the slope 42 and enters the vicinity of the bottom of the rice polishing chamber R2 through the intake port 63.

Here, when the electric motor 2 is driven at a constant speed, the rotational force is applied to the output shaft 3, drive pulley 4, and belt 5.
The signal is transmitted to the driven pulley 6 on the main body 10 side via. The rotational force transmitted to the driven pulley 6 is further transmitted to the drive shaft 33 and the driven shaft 44, and the outer cylinder 60, which is supported at the bottom and top by surface bearings 43 and 52, rotates in the direction of the arrow in FIG. 7 (hereinafter, forward rotation). direction). When the outer cylinder 60 rotates in the forward rotation direction, the polished rice 12 that has slid down on the inclined surface 42 of the inclined ring 41 receives pressure from the polished rice 12 above and flows through the three intake ports 63 into the rice polishing chamber R2. forced inside. The pushed-in milled rice 12 receives the pushing force of the milled rice 12 that is pushed in next, and is pushed up into the rice polishing chamber R2 together with the milled rice 12 that has already entered. At the same time, intake port 6
The rice grains that were pushed in from 3 and came into contact with the spiral 76,
The forward rotating outer cylinder 60 applies a force F having horizontal and vertical components Fk and Fv as shown in FIG. The force F inclined at the helical angle α cooperates with the pushing force due to the pressure from the inclined surface 42 and the milled rice 12 above it, and the milled rice 12
is pushed up into the rice polishing room R2. The individual rice grains pushed up are separated by a gap interval Lm-Ln due to the difference in cross-sectional shape between the hexagonal outer cylinder 60 that rotates in the normal direction and the fixed circular inner cylinder 70.
= δ, the polished rice 12 as an aggregate rises in the rice polishing room R2 while being moved and stirred in irregular directions.

In this case, the rice grains rising while contacting the inner cylinder 70 partially fit into the slit 71 as shown in FIG. scraped off. In addition, the bran layer is peeled off by the kneading motion of the rice grains due to the weight from the upper layer in the rice polishing room R2 and the pushing up from the lower layer. In addition, the rice grains that have been raised near the germ removal slits 71 so that the germ removal claws 72 face the germ removal claws 72 are scraped off from the germs remaining in the germination holes 16 and the accumulated germ powder. Furthermore, the rice grains that have reached the upper part of the rice polishing chamber R2 are rubbed and polished by the mesh 73 having an arcuate surface. Furthermore, the surface of each rice grain is polished by the friction between the rice grains. Then, remove the shaved bran powder, germ powder, and any small debris that is mixed into the bran by 1 part.
5, the rice passes through the gap between the slit 71 and the mesh 73 toward the collection duct R3, is separated from the polished rice 12, falls down the collection duct R3, and is collected into the tray 28. In this way, while undergoing grinding and polishing in a dry state, the rice polishing room R
The polished rice 13 is pushed up to the top of the rice bowl 2 and sent out from the delivery port 57, and is sent out from the delivery port 57 while being measured by an external measuring section (not shown) until a set amount is reached. When the set amount is reached, the electric motor 2 is stopped, and the delivered polished rice is then transferred to a rice cooking process, where it is put into a rice cooker and heated with an appropriate amount of water to be cooked.

By the way, in the above-mentioned vertical dry rice polishing apparatus, when the electric motor 2 is stopped, rice remains in the rice polishing chamber R2. Additionally, rice polishing machines generate heat due to friction with the rice during polishing. Therefore, the rice remaining in the rice polishing chamber R2 at the end of the rice polishing is cracked by the residual heat of the rice polishing machine. To prevent this from happening, it is necessary to remove all the remaining rice after rice grinding from the rice grinding chamber.

FIG. 1 shows a system in which the electric motor 2 is rotated in the reverse direction for a predetermined period of time after the rice polishing is completed, so that all the remaining rice is returned from the rice polishing chamber to the storage chamber side, thereby preventing the remaining rice from cracking due to the residual heat of the rice polishing machine. 1 is a schematic configuration diagram of a drive control device for a vertical dry rice polishing apparatus according to the present invention.

To explain this in more detail based on FIG. 1, 10
Reference numeral 1 denotes an operation unit, which includes at least a rice-grinding key 101a that allows only rice to be polished, and a fully automatic key 101b that allows other processes such as rice cooking to be performed continuously after rice is automatically polished. be.

Reference numeral 102 represents a signal determination unit, and the rice polishing key 10
1a or fully automatic key 101b is selected,
When the rice polishing key 101a is selected, a signal (hereinafter referred to as
(referred to as the rice polishing selection signal), and also outputs the fully automatic key 101.
When b is selected, a signal (hereinafter referred to as a fully automatic selection signal) is output to inform the switching section and reverse rotation command means, which will be described later, that the fully automatic key 101b has been selected.

Reference numeral 103 denotes a switching unit, and when the rice polishing selection signal is input, the outer cylinder 6 of the rice polishing machine M is sent to the forward rotation command means to be described later.
0 (hereinafter referred to as the rice polisher operation signal), and when a forward rotation end signal, which will be described later, is input from the forward rotation command means, outputs the rice polisher operation signal to the reverse rotation command means. It is.

Reference numeral 104 denotes a forward rotation command means, which outputs a forward rotation control signal to cause the electric motor 2 of the rice polishing machine M to rotate in the forward direction to polish the rice when the rice polishing machine operation signal is input, and the measuring unit 10
When a metering end signal input indicating that the set amount has been reached is inputted from 5, output of the forward rotation control signal is stopped and a forward rotation end signal is output to the switching section 103.

Reference numeral 106 denotes a reverse rotation command means, and when the rice polishing machine operation signal is input after the rice polishing selection signal is input from the signal determining unit 102, the electric motor 2 of the rice polishing machine M is instructed to rotate for a predetermined period of time (for example, 10 A reverse rotation control signal is outputted to cause all the remaining rice in the rice polishing chamber R2 to be returned to the storage chamber R1 side by rotating the rice grinding chamber R2 in the reverse direction, and after 10 seconds have elapsed, the output of the reverse rotation control signal is stopped. When the rice polishing machine operation signal is input after determining that the rice polishing is completed and the fully automatic selection signal is input from the signal judgment section, the reverse rotation control signal is output until 10 seconds have elapsed in the same way as above. When 10 seconds have elapsed, a rice polishing completion signal is output to the other processing unit 107, that is, the rice cooker, and the rice is cooked.

Reference numeral 108 is a driver that drives the electric motor 2 of the rice polishing machine M in the corresponding rotation direction to operate the outer cylinder 60 when a rice polishing machine operation signal is input from the forward rotation command means 104 or the reverse rotation command means 106. be.

Next, the operation of the drive control device for the vertical dry rice polishing apparatus having the above-described configuration will be explained based on FIG. 1 and with reference to FIG. 2.

First, the user presses the rice polishing key 1 on the operation unit 101.
01a or the fully automatic key 101b is selected and pressed, the signal determination unit 102 selects the rice polishing key 101a or the fully automatic key 1.
01b is selected and press the Kenmai key 10.
If it is determined that 1a has been selected, the switching unit 103 and reverse rotation command means 106 are notified that the rice polishing key 101a has been selected. When the switching unit 103 receives a rice polishing selection signal from the signal determining unit 102 indicating that the rice polishing key 101a has been selected, it outputs a rice polishing machine activation signal to the forward rotation command means 104. When the forward rotation command means 104 receives a rice polishing machine operation signal input from the switching section 103, the forward rotation command means 104 controls the driver 10.
8, a forward rotation control signal is outputted until a measurement end signal is input from the measurement section 105. The driver 108 drives the electric motor 2 in the forward rotation direction, which is the rice polishing direction, based on the control signal from the forward rotation command means 104, and rotates the outer cylinder 60 of the rice polishing machine M in the forward rotation direction. As a result, the rice polishing operation described in FIGS. 2 to 9 is started, and the polished rice 13 is continuously sent out from the delivery port 57. When the polished rice 13 is delivered from the delivery port 57, the measuring unit 105 cumulatively measures the delivered polished rice 13 until it reaches a set amount. When the set amount is reached, the forward rotation command means 104 indicates that the measurement has ended.
Let me know. When the forward rotation command means 105 receives a metering end signal from the measuring section 106, it stops outputting the forward rotation control signal and outputs a forward rotation end signal to the switching section 103 to notify that the forward rotation has ended.

Next, the switching section 103 switches the forward rotation command means 10
When the forward rotation end signal is input from 4, the reverse rotation command means 1
Outputs rice polishing machine operation signal to 06. When the rice polishing machine operation signal is input from the switching unit 103 after the rice polishing selection signal is input from the signal determining unit 102, the reverse rotation command means 106 outputs a reverse rotation control signal to the driver 108 for 10 seconds. The driver 108 drives the electric motor 2 in the direction of rotation opposite to that during rice polishing based on the control signal from the reverse rotation command means 106, and rotates the outer cylinder 60 of the rice polishing machine M in the direction of rotation opposite to that during rice polishing for 10 seconds. let As a result, all the remaining rice in the rice polishing chamber R2 is returned to the storage chamber R1 side, and the remaining rice is prevented from being broken by the residual heat of the rice polishing machine. Thereafter, when 10 seconds have elapsed, the reverse rotation command means 106 stops outputting the reverse rotation control signal, and determines that the rice polishing is completed.

Further, the reverse rotation command means 106 controls the switching unit 10 after receiving the fully automatic selection signal from the signal determining unit 102.
When the rice polishing machine operation signal is input from 3, a reverse rotation control signal is output to the driver 108 for 10 seconds as described above to drive the electric motor 2 in the opposite rotation direction from that during rice polishing, and after 10 seconds have elapsed. The output of the reverse rotation control signal is stopped, and a rice polishing end signal is output to the other processing unit 107, ie, the rice cooker, to shift control to the rice cooking process.

[0037]

[Effects of the Invention] As described above, according to the present invention, since the electric motor is rotated in the reverse direction for a predetermined period of time after rice polishing is completed, all remaining rice can be returned from the rice polishing chamber to the storage chamber. This has the effect of preventing leftover rice from cracking due to residual heat from the rice polishing machine.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of the configuration of a vertical dry rice polishing apparatus to which the present invention is applied.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a vertical cross-sectional view of the vicinity of the rice polishing room.

FIG. 5 is an enlarged view of a slit for embryo removal.

FIG. 6 is a top view of the inner cylinder.

FIG. 7 is an explanatory diagram of rice polishing operation.

FIG. 8 is an explanatory diagram of the conveyance state of rice grains.

FIG. 9 is an explanatory diagram of a slit polishing operation.

[Explanation of symbols]

2　Electric motor 12 Rice polishing 13. White rice 57 Outlet 60 Outer cylinder 63 Intake port 70 Inner cylinder 71 Slit 72 Germ removal nails 101 Operation section 104 Forward rotation command means 105 Measuring part 106 Reverse rotation command means M rice polishing machine R1 Storage room R2 Rice research room

Claims (1)

[Claims] [Claim 1] An inner tube and an outer tube are loosely fitted in a storage chamber for temporarily storing polished rice, and arranged vertically so as to be relatively rotatable, and the gap between the inner tube and the outer tube changes. A ring-shaped rice grinding chamber is formed, and in this rice grinding chamber, the polished rice introduced into the lower part of the rice grinding chamber from the storage chamber is guided to the upper part of the rice grinding chamber during the relative rotation, and the polished rice is ground and ground. A rice polishing machine is provided with a group of slits for carrying out grinding, and is configured to send polished rice after grinding and germination from the upper part of the rice polishing chamber, and drives either an inner cylinder or an outer cylinder of this rice polishing machine. a measuring unit installed outside the rice polishing machine that measures the polished rice sent out from the top of the rice polishing chamber until it reaches a set amount, and outputs a measurement end signal when the set amount is reached; forward rotation command means for rotating the electric motor in the rice polishing direction based on the rice polishing machine operation signal from the operating section until a measurement end signal is input from the measuring section; A drive control device for a vertical dry rice polishing apparatus, comprising: reverse rotation command means for rotating the electric motor in a direction opposite to the rice polishing direction for a predetermined period of time based on a forward rotation end signal from the rotation command means.