JP3704341B2 - Dry washing-free rice production equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention relates to the dry-type non-washing rice manufacturing apparatus for manufacturing what is called non-washing rice which does not require the washing rice before cooking rice.
[0002]
[Prior art]
On the surface of the polished rice obtained by polishing brown rice with a rice mill, sticky rice cake (which is called “skin nuka”) that cannot be removed by the rice mill is attached. Usually, brown rice is composed of a rice bran layer, an aliuron layer, an umami layer at the bottom, and a starch layer (endosperm) inside it, but it is said that almost half of the aliuron layer is usually peeled off by a rice mill. However, wrinkles still exist inside the cells of the aliuron layer having a honeycomb-like cell structure (this is the above-mentioned skin nuka).
[0003]
At home, this polished rice is removed by sharpening and washing before cooking rice, but at the same time, it is said that the umami component present in the lower bottom area of the white aliuron layer is also washed away. On top of that, it has been pointed out that the sharpening juice, along with other household wastewater, is a source of environmental pollution in rivers.
[0004]
Therefore, focusing on such drawbacks, in recent years, so-called wet washing-free rice production has been actively performed in which the rice cake adhering to the surface of the polished rice after washing with a rice mill is washed with water and then dehydrated and dried (for example, Patent Document 1), which is provided as “no-wash rice” that does not require sharpening in the market. However, it is difficult to adjust the amount of moisture and dryness in such wet-washed rice production method, and recently, without using water, add nuka (rice cake) to attach the skin nuka on the surface of polished rice. It is produced by a so-called dry-type non-washing rice machine (see, for example, Patent Document 3) that removes residual Nuka by rubbing white rice after milling in order to eliminate the risk of residual Nuka smell (for example, Patent Document 2). A lot of “washless rice” is also on the market.
[0005]
[Patent Document 1]
JP 2003-10703 A [Patent Document 2]
JP 2003-53200 A [Patent Document 3]
Utility Model Registration No. 3086163 [0006]
[Problems to be solved by the invention]
FIG. 8 and FIG. 9 show an example of a dry-type non-washing rice machine described in Patent Document 3.
[0007]
As shown in FIG. 9, this conventional washing-free rice machine is formed with a large number of slits 02 in parallel in the lower part of the cylinder 01 along the circumferential direction and near the half circumference where the rice grains do not fall. The processing machines 05 and 06 in which spiral bodies (screws) 04 having rice blades 03 for feeding rice are arranged in two stages as shown in FIG. 8 and suction machines 07 connected to these processing machines 05 and 06 are provided. It is configured with. In such an apparatus, the polished rice is passed through one processing machine 05 and then guided to the next processing machine 06, and rice bran and small rice generated in the cylinder 01 (rice crushed into small grains) On the other hand, a suction process can be performed by the suction machine 07.
[0008]
In this washing-free rice machine, the polished rice that passes through the cylinder body 01 by the spiral body 04 contacts the corners of the cuts 02 formed in the cylinder body 01 during the passage, thereby causing fine wrinkles attached to the surface of the rice grains. It is peeled off and discharged from the cut 02 together with the small rice mixed in the polished rice.
[0009]
However, in this washing-free rice machine, the parallel cuts 02 provided in the cylinders are perpendicular to the axial direction of the spiral body 04 (the direction in which rice advances by the rotation of the screw blades 03) 08, and each cut 02 is a cylinder. It was found that the following inconvenience occurred because the opening was continuous in the half-circumference range of the body 01.
[0010]
That is, the polished rice advances in the axial direction 08 while being slightly swung up in the circumferential direction of the cylindrical body 01 by the rotation of the spiral screw blade 03, so that the rice grains are not long and long in the circumferentially long cut 02. It will be exposed to a time contact state. As a result, it has been found that the surface of the polished rice surface (in the aliuron layer) is preferably peeled off, but the umami layer region at the bottom of the aliuron layer may be peeled off. As a result, the goodness of the pre-washed rice is halved, and it is unavoidable that the non-washed rice has a poor taste. In addition, since the number of times of contact and time are large, the occurrence of small rice is increased, and the rice washing machine has a poor yield. Furthermore, the polished rice after the non-washed rice treatment has a poor gloss, no shine (transparency), poor whiteness and high product value.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention is a washing-free rice production apparatus for removing milled rice from the milled rice while transferring the milled rice after milling in the axial direction by a screw conveyor in the milling cylinder,
A number of slits are arranged in the axial direction of the removal cylinder to form a slit array on the circumferential surface of the removal cylinder, and a plurality of slits are arranged at regular intervals in the circumferential direction of the removal cylinder. And a sliding contact roll for preventing clogging that rotates while sliding on the outer peripheral surface around the outer periphery of the removal cylinder is provided .
[0012]
According to such a configuration, when the polished rice passes through each slit, the polished rice comes into contact with the corners of the slit and the wrinkles adhering to the surface of the rice grains are peeled off, and the degreasing action is exhibited. Since it is provided intermittently in the direction, the burden on the polished rice is reduced, the action of suppressing the phenomenon of small rice generation is exhibited, and the surface of the rice grains is hardly damaged. In particular, when the polished rice passes through the inner surface of the removal cylinder in the area where there is no slit row (the area where there is no slit between adjacent slit rows), the surface of the polished rice is gently rubbed (rubbed) and polished. Is used to produce polished rice with a shine (transparency). This is based on the knowledge that the polishing phenomenon of polished rice occurs by providing a slit non-existing region on the peripheral surface of the lower half of the removal cylinder by experiments. Also, Since the clogging prevention sliding contact roll that rotates around the outer periphery of the dust removal cylinder and slidably contacts the outer peripheral surface is provided. As it passes, rice cakes and small rice are pushed into the removal cylinder to remove the clogging from the slit. If the material of the sliding contact roll is made of a resin having a rough surface, the clogging prevention effect is enhanced.
[0013]
In the above configuration, when the slits are arranged in parallel with each other and obliquely intersecting with the axial direction of the stripping cylinder , a small rice generation phenomenon (a phenomenon in which rice breaks down to a small extent , resulting in poor yield). Cause the product value to fall).
[0016]
In addition, when the motor for rotating the screw blades is a variable motor whose rotation speed can be varied, no washing rice depending on the raw rice or polished rice having different properties depending on the variety, production area, weather conditions, etc. By controlling the rotational speed to increase the whiteness of the polished rice after the treatment, an appropriate washing-free rice treatment environment can be created in the dehuller cylinder.
[0017]
In addition, if a cold air intake is provided on the side of the milled rice for taking cold air into the dedusting cylinder, the temperature in the demolding cylinder, that is, the demolding chamber, is lowered, and the rice cake adhering to the surface of the milled rice easily peels off. You can create an environment. This utilizes the property that the cocoons are easily peeled off by lowering the product temperature on the surface of the polished rice (the cocoon peeling promoting action).
[0018]
In addition, if the above-mentioned washing-free rice production apparatus is provided in a plurality of stages (for example, 2 to 3 stages), adjustment of the dehulling action while confirming the washing-free rice treatment degree (gloss, whiteness, etc.) of the polished rice And the loss of excessive umami components can be prevented.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a dry-type non-washing rice production apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the dry-type non-washing rice production apparatus, which mainly comprises the following configuration. That is, as shown in the figure, the dry-type non-washing rice production apparatus of the present invention removes polished rice obtained from a conventionally known rice mill (not shown) (a machine for removing polished rice on the surface of brown rice to obtain polished rice) as follows. A supply pipe 1 for feeding to the rice bran processor, a primary dehumidification processor 2 for firstly removing the milled rice supplied from the supply pipe 1, and this primary demolding A feed pipe 3 for sending the processed polished rice to the secondary removal processor 4, and a secondary removal that receives the supply of the polished rice from the supply pipe 3 and performs the second stage removal process. The slag processor 4, the discharge pipe 5 for delivering the polished rice after the slaughtering process to the transfer means 6, and the casing hoppers 7, 8 of the primary and secondary scouring processors 2, 4, respectively. It is mainly comprised from the sputum suction pipes 7a and 8a connected to the lower end. The soot suction pipes 7a and 8a merge to become one main suction pipe 9 and are connected to a suction machine (not shown) provided with a blower. Reference numeral 10 denotes a control box.
[0020]
Since the primary and secondary dehulling treatment machines 2 and 4 each have a washing-free rice production function, the non-washing rice production apparatus according to the present invention combines a plurality of stages of dehulling treatment machines. It means the whole device, and it also means an individual removal processor.
[0021]
The primary debonding processor 2 has a long side casing in which a belt casing 11, an input side casing 12, a demolding casing 13 and an outlet side casing 14 are connected in this order. The secondary removal processor 4 also has the same configuration, and is arranged symmetrically with these arrangements of the primary removal processor 2. That is, in the secondary debonding processor 4, the side to which the feed pipe 3 is connected becomes the input side, and the belt casing 21, the input side casing 22, the degassing casing 23, and the outlet side casing 24 in this order toward the payout side. It is lined up.
[0022]
In the primary dehuller 2, the supply pipe 1 for supplying the milled rice after passing through the rice milling machine 2 is guided from above and connected to the upper surface of the input side casing 12. Yes. Along with the supply pipe 1, a cold air inlet 15 is provided on the upper surface of the charging casing 12, and a manual on-off valve 16 is provided at the cold air inlet 15. Reference numeral 16a denotes an operation lever for opening and closing the valve. In the summertime when the outside air temperature is high, a cold air supply pipe from a separately provided cooling air generator (cooler) is connected to the joint of the on-off valve 16, and in the wintertime when the outside air temperature is low, the cold air supply pipe Is removed from the joint portion of the on-off valve 16 so that cold outside air is directly fed into the charging side casing 12 via the on-off valve 16. This is because, based on the knowledge that rice cake adhering to the surface of the polished rice can be easily peeled off by lowering the product temperature on the surface of the polished rice (the removal action is promoted), That is, the inside of the removal chamber can be cooled. Actually, the temperature of the polished rice after milling is as high as about 35 to 40 ° C., and if this is the case, the effect of removing the debris in the removal room decreases. When the outside air is high as in summer, the temperature of the cooling air is set so that the temperature inside the removal chamber becomes lower than the outside air temperature (with a temperature difference of about 8 ° C.).
[0023]
As shown in FIG. 2, as described above, the quadrangular pyramid hopper 7 is provided at the lower portion of the demolding casing 13, and the soot suction pipe 7 a is connected to the lower end of the hopper 7. An input side casing 12 and an outlet side casing 14 are connected to the left and right sides (reception side of the polished rice) and the outlet side (exit side of the polished rice after the removal), respectively.
[0024]
Incoming and outgoing protruding ring bodies 18 and 19 are provided which protrude from the respective side walls of the charging side casing 12 and the outlet side casing 14 to the inside of the demolding casing 13, and these have axial centers aligned with each other. They are provided concentrically (concentrically). A laterally long cylindrical removal cylinder 20 which will be described later is bridged between the entrance-side and exit-side protrusion ring bodies 18.19, and each end of the removal cylinder 20 is connected to both protrusion ring bodies 18, 19 respectively. And is fixed so as not to rotate at these positions.
[0025]
As shown in FIG. 3, a spiral body (screw conveyor) 26 having spiral screw blades 25 on the circumferential surface is internally provided inside the removal cylinder 20 (the inside is a “removal chamber”). Yes. The spiral body 26 extends to the inner end of the charging-side casing 11 in order to convey the polished rice charged into the charging-side casing 11 from the receiving position through the scavenging cylinder 20 to the outlet side in the axial direction ( (See FIG. 2).
[0026]
As shown in FIG. 2, the charging-side rotating shaft 27 protruding from the axis of the spiral body 26 is pivotally supported by a bearing 28 provided on the outer wall 12 a of the charging-side casing 11, and has a large-diameter driven pulley at its tip. (Sprocket) 29 is mounted on the shaft. A main driving pulley 30 with a small diameter is provided below the driven pulley (sprocket) 29, and a driving shaft 32 of a driving motor 31 is connected to the main driving pulley 30. A toothed belt 33 is stretched over the main pulley 30 and the driven pulley 29. The drive motor 31 is installed on the gantry 34 together with the charging side casing 11. The rotating shaft 35 on the exit side of the spiral body 26 is pivotally supported on the outer wall 14 a of the outlet side casing 14 via a bearing 36. Therefore, the rotation of the drive motor 31 is decelerated and transmitted to the large-diameter driven pulley (sprocket) 29 via the small-diameter main pulley (sprocket) 30. As a result, the screw blades 25 can be rotated inside the removal cylinder 20 so that the polished rice can be conveyed in the direction of the outlet side casing 14 while peeling off the surface of the polished rice in the removal chamber.
[0027]
The drive motor 31 employs a variable motor, and changes the frequency of the screw blades 35 by changing the frequency thereof, thereby moving the milled rice to be removed (the residence time in the removal chamber). ), It is possible to create a dehulling treatment environment suitable for the properties of rice that changes according to the variety and production area of rice. The drive motor 31 is preferable because, for example, an induction motor (induction motor) capable of controlling the number of rotations by frequency is versatile and has good controllability. If such a variable motor is adopted, the properties of rice differ depending on the varieties, production areas, even in the same production area, and depending on the weather conditions of the year, etc. The soot layer can be removed appropriately. Normally, it is operated at 135 rpm of 18.1 Hz, but the number of rotations is determined by looking at the gloss, whiteness, etc. of the polished rice after milling or washing-free rice treatment. If the whiteness or the like of the polished rice is low, the rotational speed is lowered and the residence time in the polished rice removal chamber is lengthened to adjust the removal effect.
[0028]
The control box 10 is installed on a gantry 37 below the secondary dewaxing processor 4. In the case of an electric motor that controls the number of revolutions by frequency, a frequency selection switch (knob) is provided inside the control box 10, and the frequency is changed by manually turning the switch (knob) to set a predetermined motor revolution number. I can do it.
[0029]
In addition, since the secondary removal processing machine 4 is only installed symmetrically with the primary removal processing machine 2 mentioned above and both have the same structure, the secondary removal processing. Description of the machine 4 itself is omitted. You may arrange | position the 3rd step | paragraph of the 3rd stage removal machine after the 2nd removal machine. In this case, the payout pipe 5 from the secondary decontamination processor 4 may be connected to the input side of the third decontamination processor.
[0030]
FIG. 4 (a) shows an enlargement cylinder 20 enlarged. The removal cylinder 20 is formed in a cylindrical body, and enlarged diameter flanges 20a and 20b are formed at both ends thereof. The removal cylinder 20 is locked and fixed to the projection ring bodies 18 and 19 on the input side and the outlet side so as not to rotate by the projection pins 20c and the flat portions 20d provided on the flange portions 20a and 20b at the ends. . A large number of slit rows 40 are opened on the peripheral surface of the lower half of the removal cylinder 20.
[0031]
The following two modes are main in the form of the slit row.
[0032]
That is, as shown in FIGS. 4 (a) and 4 (b), the slits 40a that are elongated in the circumferential direction of the removal cylinder 20 (as a whole are rectangular and have corner rounds at both ends) are parallel to each other. And arranged in an obliquely intersecting direction with a certain angle with respect to the axial center line 20e of the scavenging cylinder 20. A large number of such slits 40 a are arranged on the circumferential surface of the removal cylinder 20 in the axial direction of the removal cylinder 20 to form the slit array 40. A plurality of such slit rows 40 are arranged side by side at a constant interval D in the circumferential direction of the ridging cylinder 20, so that a slit row group is formed as a whole. By setting a certain distance D, a slit non-existing region 41 is secured on the peripheral surface therebetween.
[0033]
The opening width B of each slit is set as an opening of about 70 to 80% of the size (grain thickness) of the rice grain. In other words, the grain thickness of Koshihikari, Kinuhikari, Akita Komachi, Hitomebore, Sasanishiki, etc., which are popular rice on the market, occupies nearly 90% of the range of 1.9 to 2.2 mm, and therefore the slit opening width is 1.3. The range around ~ 1.7mm is the preferred range, and if the slit opening width is smaller than this range, the dehulling action is drastically reduced, and if it is larger, the dehulling action is excessively exerted and the surface of the polished rice can be damaged, It has been confirmed by experiments that the phenomenon of rice cracking (the phenomenon that rice breaks down) increases and the yield worsens. For all varieties, if the slit opening width is set to around 1.5 mm, which is the average of the above values, the expected dehulling action can be obtained for any rice varieties, the umami component remains, and the yield is improved. Has been confirmed by experiments.
[0034]
The inclination of each slit 40a is preferably substantially the same as the spiral advance angle α (see FIG. 2) of the screw blade. This is to reduce the flow resistance and reduce the burden on the polished rice so that the polished rice is not cracked or scratched. is there. The opening pitch P in the axial direction of each slit 40a is preferably around 1 to 1.5 mm.
[0035]
The stripping cylinder 20 having the slit row 40 is formed by forming a slit 40a at a predetermined position of a flat plate (made of steel plate) of a predetermined size, then bending the flat plate into a cylindrical shape, and welding the edges. It is done.
[0036]
The main reason for securing the slit non-existence region 41 by providing the slit rows 40 with a constant interval D is to give gloss to the surface of the polished rice. In order to obtain a good balance between the removal effect and the glazing effect, the distance D between the slit rows is preferably half of the slit length L, that is, D = L / 2. When slit rows 40 are arranged at a constant interval D, compared to the conventional case where slits continuous in the circumferential direction are arranged side by side (see FIG. 9), removal of the slit non-existing region 41 is eliminated. When the polished rice passes (moves) through the inner surface of the cylinder 20, the polished rice surface is gently rubbed to exert its glazing action, and the gloss (brightness) and whiteness of the polished rice are remarkably increased, increasing the commercial value. Has been confirmed by experiments.
[0037]
The main reason for providing the slit row 40 only on the lower half peripheral surface of the removal cylinder 20 is that the lower half peripheral surface forms a main conveyance (movement) path in contact with the polished rice. The peripheral surface is a range that is out of the main conveying (moving) path of the polished rice, and its removal effect is difficult to be exerted. This is because the pipe 7a, 8a draws too much air in the removal cylinder 20 so that the dryness in the removal cylinder 20 is excessively increased, and cracks are easily generated in the polished rice.
[0038]
As another aspect of the slit, there is a right-angle type slit (right angle slit) row 50 as shown in FIGS. The slits 50a are different from the oblique slits 40a in that all the slits 50a are oriented in a direction perpendicular to the axis 20e of the scavenging cylinder 20, but other configurations (for example, a constant interval D is provided between the slit rows). Point) is the same. Also in this case, a slit non-existing region 51 is provided.
[0039]
An oblique slit (or a right-angle slit) may be adopted for both the above-described primary removal machine 2 and the secondary removal machine 4. A right-angle slit may be adopted for the dehuller 2, and an oblique slit may be adopted for the second dehuller 4 (or vice versa). The combination is determined by the gloss, whiteness, yield, etc. of the polished rice after the dehulling treatment. If right angle slits are used, depending on the nature of the rice, if the number of rotations of the motor is increased slightly to increase the moving speed of the milled rice and shorten the residence time in the removal cylinder, the occurrence of small rice is reduced. Good. In addition, although not shown in figure, you may make a 3-stage removal machine.
[0040]
Next, the clogging prevention device 60 provided inside the demolding casing 13 will be described with reference to FIGS. 2 and 7.
[0041]
A pair of annular bodies 61 and 62 are provided concentrically on both sides, and three fixing rods 63 are installed between the annular bodies 61 and 62 on both sides to maintain the structure. Further, a pair of holes 64a are formed in the opposing surfaces of the toric bodies 61 and 62, and a substantially Z-shaped locking bar 64 is fitted into and engaged with the holes 64a on both sides. A sliding contact roller 65 for preventing clogging is attached to 64.
[0042]
The sliding roller 65 is long so as to be able to contact the entire area in the longitudinal direction of the peripheral surface of the removal cylinder 20. The material of the sliding contact roller 65 is made of synthetic resin or rubber. A pair of springs 66 urging toward the center of the removal cylinder 20 in order to always press the sliding contact roller 65 against the outer peripheral surface of the removal cylinder 20 between the pair of fixed bars 63 are orthogonal to the sliding contact roller 65. It is stretched in the direction. The spring 66 is provided in the vicinity of both ends of the removal cylinder 20. A large number of teeth 62a are formed on the outer peripheral surface of the annular body 62, and the annular body 62 itself forms a sprocket. On the other hand, a rotary motor 68 is installed in the removal casing 13, and a toothed belt 70 is stretched between a sprocket 69 provided at the shaft end of the rotary motor 68 and the sprocket of the annular body 62. Yes. Further, three guide rollers 67 are arranged on the outer surfaces of the circular rings 61 and 62 so as to be able to roll on the protrusion ring 18.19 described above.
[0043]
When the rotary motor 68 is driven (always operated while the de-coating processor is in operation), the de-pigmenting cylinder 20 is fixed and does not rotate, but the pair of toric bodies 61 and 62 are projected by the guide roller 67. It rotates along the peripheral surfaces of the bodies 18 and 19. Accordingly, the clogging prevention sliding contact roller 65 rotates (revolves) around the circumferential surface of the removal cylinder 20 while being pressed against the outer circumferential surface of the removal cylinder 20 by a spring force.
[0044]
The sliding roller 65 is always pressed against and contacted with the outer peripheral surface of the scavenging cylinder 20, so that the ridges and small rice that protrude from the opening portion of the slit 40a (50a) and block the slit 40a (50a) are retained. It is pushed back to the inside of the removal cylinder 20 and peeled off from the opening peripheral edge of the slit 40a (50a) to exert a clogging preventing action, and is dropped to the lower hoppers 7 and 8 by the suction force of the suction machine, and the soot suction pipes 7a and 8a Quickly and efficiently.
[0045]
【The invention's effect】
According to the present invention, it is possible to obtain an appropriate dehulling effect as washing-free rice treatment, as well as to reduce the burden on milled rice in the dehulling process, to reduce the phenomenon of small rice generation, and to damage the surface of the rice grain. It becomes difficult to be attached, and the yield can be remarkably improved. In addition, by providing a slit-free area on the peripheral surface of the removal cylinder, the surface of the polished rice is gently rubbed when the polished rice passes through the inner surface of the removal cylinder, so that the polishing effect is exhibited and gloss (shine) ) Can be obtained. As a result, it is possible to obtain polished rice having a high commercial value with a high yield.
[Brief description of the drawings]
FIG. 1 is a perspective view of a washing-free rice production apparatus according to the present invention.
FIG. 2 is a cross-sectional view of a dehuller that forms part of the washing-free rice production apparatus.
FIG. 3 is a cross-sectional view showing a partially half-cross section of a scissor tube.
4A is an enlarged view of the removal cylinder of FIG. 3, and FIG. 4B is an enlarged view of an oblique slit-type slit row provided on the peripheral surface of the removal cylinder.
FIG. 5 is a diagram showing a partial half-cracked cross-section of the removal cylinder, showing another example of the removal cylinder.
6A is an enlarged view of the removal cylinder of FIG. 5, and FIG. 6B is an enlarged view of a slit array of right-angle slit type provided on the peripheral surface of the removal cylinder.
FIG. 7 is a perspective view showing the clogging prevention device taken out.
FIG. 8 is a schematic overall view of a conventional washing-free rice production apparatus.
FIG. 9 is a view showing a partial half-cracked cross section of a conventional removal cylinder provided with continuous slits.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Supply pipe 2 ... Primary dedusting processing machine (wash-free rice production apparatus)
3 ... feed pipe 4 ... secondary demolding machine (wash-free rice production equipment)
5 ... Discharge tube 7, 8 ... Hopper 7a, 8a ... Suction tube 10 ... Control box 15 ... Cold air inlet 20 ... Removal tube 20e ... Shaft core 25 ... Screw blade 26 ... Spiral body (screw) Conveyor)
31 ... Drive motors 40, 50 ... Slit row 40a ... Diagonal slit α ... Advance angle 50a ... Right angle slit 41, 51 ... Slit-free region 60 ... Clogging prevention devices 61, 62 ... Torus 63 ... Fixed rod 65 ... Slide Contact roller 66 ... spring 68 ... rotary motor

Claims (5)

It is a washing-free rice production apparatus that removes milled rice from the milled rice while transferring the milled rice after milling in the axial direction by means of a screw conveyor in the barrel.
A number of slits are arranged in the axial direction of the removal cylinder to form a slit array on the circumferential surface of the removal cylinder, and a plurality of slits are arranged at regular intervals in the circumferential direction of the removal cylinder. A dry-type non-washing rice production apparatus provided with a sliding roll for preventing clogging, which is provided and rotates while sliding around the outer periphery of the removal cylinder .   2. The dry-type non-washing rice production apparatus according to claim 1, wherein the slits are arranged in parallel to each other and in an obliquely intersecting direction with respect to the axial direction of the removing cylinder. The dry-type non-washing rice production apparatus according to claim 1 or 2 , wherein the motor for rotating the screw blades is a variable motor whose rotation speed is variable . The dry-type non-washing-rice manufacturing apparatus of any one of Claims 1-3 which provided the cold-air intake for taking in cold air in a removal cylinder in the polished rice input side . The dry-type non-washed rice manufacturing apparatus which provides the wash-free rice manufacturing apparatus of any one of Claims 1-4 continuously in multiple stages.

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