JP3294248B2 - Vertical grinding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding type grain mill provided with a grinding type milling roll composed of a Kongo roll, and more particularly to a grinding type vertical grain milling machine.

[0002]

2. Description of the Related Art Conventionally, in this type of vertical grinding machine of the grinding type, it is necessary to supply raw material grains from the upper part of the refining chamber and discharge the refined grains from the lower discharge port (downward feeding). Formula), that
On the contrary, the raw material grains are supplied from the lower part of the refining room and the refined grains are discharged from the upper outlet (upward feed type).
Anyway, planetary centrifugal motion of the grain is performed actively, for the 1 grain kernels of the peripheral surface of even fully Amane Do rather abrasive type TadashiKoku roll for whole grain emery (abrasive (and) grain) Contact
It is necessary that the grain surface layer (bran layer) be uniformly removed.

[0003] To facilitate the movement of the grain encourages the milling chamber of bran-removing (female operatives), the grains roll formed by a plurality of divided rolls performs air jet from the gap of the rolls However, each time a grain reaches this gap, the pressure at which the grain is pressed against the bran-removing net is reduced, which makes it difficult for the grain to pass through the milling chamber to have a uniform pressure throughout the process. . In addition, in order to reduce uneven milling, a large-diameter portion and a small-diameter portion are provided on the peripheral surface of the milling roll to form irregularities, thereby increasing the effective milling area of the milling roll. Although it is considered (Japanese Patent Application No. 4-289586 filed by the present applicant), also in this case, the pressure distribution in the refining chamber has a large difference in height, and problems such as the occurrence of crushing remain.

[0004] In view of these problems, an object of the present invention is to provide a vertical grinding machine of the grinding type which reduces the difference in pressure distribution in the whitening step and has no uneven grinding.

[0005]

[Summary of the order to solve the above problems the present invention, the main shaft rotatably supporting the upstanding the bran removing cylinder, air jet a plurality of disc-shaped Kongo roll on top side of the main shaft
Pivotally attached to the heavy set via the grooves, to the plurality of Kongo rolls upper
Connected by providing a feed grain spiral (helical) rolls, said the grain supply part of the upper end of the milling chamber of the main portion between the bran removing cylinder and said plurality of Kongo rolls, grains its lower end In a grinding type vertical grain mill in which a bran removing chamber is formed by an outer cylinder surrounding each of the bran removing cylinders and communicating with the discharge section, a. The grain drainage
The Kongo roll on the outlet side is larger than the height of the blast groove
Make a thick roll. B. The remaining thickness of the Kongo roll is
It is smaller than the height of the blast groove . This is a technical measure.

[0006]

[Functions and effects] The grains supplied from the grain supply unit to the refining chamber enter into the gust blast, rotate and revolve while contacting the upper and lower surfaces of the disk-shaped roll, and the surface layer of the grains is scraped off in multiple directions. It is. In this way, the grains are sent to the grain discharge section side while being subjected to the grain-milling action by a large number of disc-shaped rolls. However, since the peripheral surface of the Kongo roll is formed by a disc-shaped roll having a small thickness, the polishing chamber The grain of passes through the high-pressure part and the low-pressure part alternately and continuously, so that the effective grain area greatly increases, and the difference in pressure distribution in the whole process of the milling chamber decreases, and the grain efficiency increases. And the occurrence of crushed granules is reduced. Further, since the diamond roll of the grain discharge section is formed by a roll having a relatively large thickness, the pressing force of the external resistance at the grain discharge section is easily transmitted to the grain supply section side.

[0007]

Next, taking a case where rice grains are milled as grains as an example, a vertical grinding machine of a preferred embodiment according to the present invention will be described with reference to FIGS. 1 and 2. FIG.

In FIG. 1 showing an overall vertical sectional view of a grinding type vertical grain mill 1, reference numeral 2 denotes a base, and a main shaft 5 is mounted on upper and lower bearings 3 and 4 in the base 2. 2 stands vertically and substantially rotatably at substantially the center. A pulley 6 is provided at the lower end of the main shaft 5, and the pulley 6 and the motor 7
Connected by the belt 9, the main shaft 5 is rotated at an appropriate rotation speed. The main shaft 5 has a hollow shape for weight reduction, and an upper half thereof projects above the base 2.

[0009] The manner to surround the upper bearing 3 near the upper end edge 及 beauty bushing 1 of the current bran cylinder 11 having an open upper base 2
0 and fixed. A rotating cylinder 12 having an open lower portion is provided on the main shaft 5 in the bran collecting tube 11 to form a bran collecting chamber 41 therebetween. The rotating bran scraping blade 13 is mounted. Sa
Further , a bran discharge port 14 is opened at the bottom of the bran collecting cylinder 11, and the bran discharge port 14 is connected to a bag filter and a bran collecting fan (not shown) by a bran duct 15.

The rotating ring 16 is mounted on the rotating cylinder 12 and
, And a bristle roll 17 is mounted on the rotating ring 16. That is, the boss portion 18 is provided with a circular hole 19 and a key groove 20 through which the main shaft 5 is inserted, the boss portion 18 and the ring portion 21 near the periphery are connected by the arm 51, and a plurality of ventilation openings 22 are provided. Form an iron disk. The ring portion 21 is formed on the disk-shaped roll 23 by applying abrasive grains on both the front and back surfaces, and the thickness including the abrasive surface is 5 to 10 mm. The peripheral portion is chamfered so as not to break the grains, and the peripheral surface does not necessarily need to form an abrasive surface.

The disk-shaped rolls 23 thus formed are axially attached to the main shaft 5 and polymerized.
A blast spacer 24 having a thickness of 6 to 10 mm is interposed therebetween. The blast spacer 24 is attached to the main shaft 5 by a circular hole 19 and a key groove 20 provided in the boss 25 in the same manner as the disk-shaped roll 23. An arm 26 projects radially from the boss 25, and the tip of the arm 26 is curved toward the rear side in the rotation direction (R) of the rigid roll 17. Each of the disc-shaped rolls 2 is
A gap is formed between the three, and the gap forms a blast groove 27.
In order to prevent the blast opening 22 from being closed (removed), it is preferable that the arm portion 26 of the blast spacer 24 and the arm 51 of the disc-shaped roll 23 overlap as much as possible.

In this way, a large number of disk-shaped rolls 23 are superimposed via the blast spacers 24 to form a bristle roll 17, which is mounted on the plurality of bristle rolls 17 to provide a cylindrical spiral roll 28. By pressing down the boss 28a of the spiral roll 28 with a bolt 29 screwed into the upper end of the main shaft 5, the spiral roll 28 and the plurality of rigid rolls 17 are integrally mounted on the main shaft 5. Spiral roll 2
8 in the upper opening is provided to connect the guide member 30 of the hollow conical, connect one end of the inlet tube 31 taken outside air openings 34 provided in a plurality 箇 plant on the peripheral surface of the guide body 30, taken outside air The other end of the cylinder 31 is connected to an opening 33 provided in the upper cover 32. Sa
Further , a supply amount adjusting device 35 is provided at the grain supply port 50 at the upper end of the upper cover 32.

[0013] On the other hand, bran removing cylinder 3 on the periphery of the Kongo roll 17
6 is provided, and a refining chamber 40 having a main portion between the bran removing tube and the Kongo roll 17 is formed. The bran removing cylinder 36 is formed by supporting an arc-shaped bran removing net 36a between four pillars 37, and an arc-shaped cover 38 is mounted between the pillars 37 to form a bran removing chamber 39. The lower end of the bran removing chamber 39 is connected to the bran collecting chamber 41. In addition, the grain discharge port 42 communicating with the milling chamber 40 below the bran-removing cylinder 36 is provided, connected to the discharge port 42 of the discharge gutter 43 provided, weight 44 to exhaust Detoi 43
Resistance plate 45 biased toward the grain discharge port 42 by the
Attach. The discharge port 42 may be provided with a guide plate 46 for guiding the grains to the discharge gutter 43. In addition, each of the columns 3
A resistance bar 47 is loosely fitted (contained) in the concave portion formed in the inside 7,
The resistance bar 47 is adjusted by the adjusting knob bolt 48 to the polishing room 40.
Is formed so that it can enter and exit.

[0014] Hereinafter, will be explained concretely operation in the above embodiment. The grain supply port 5 is controlled by the supply amount control device 35.
0 raw brown rice is supplied is adjusted to an appropriate flow rate, substantially evenly flow down in the circumferential direction along the inclined surface of the guide member 30, and
Further , it is sent into the refining chamber 40 by the spiral roll 27. The rice grains in the polishing chamber 40 are
4 is rolled in the polishing chamber 40 along the bran removing cylinder 36 while being agitated by the resistance bar 47 while being stirred by the resistance bar 47.
7, the ring portion 2 of the upper and lower disc-shaped rolls 23
The rice grains revolve and revolve within 1, and the rice grains come into contact with the abrasive grains of the ring 21 over many steps over a long process, and the surface layer is cut by the abrasive grains.

[0015] Thus, the central portion (the main shaft 5) side rice grains to move while rolling, the arm 2 of the air jet spacer 24
6, the spiral roll 28
Of the ring portion 21 in the blast groove 27 formed between the lower disc-shaped rolls 23 by the
Due to the milling action. As described above, since the rice grains in the refining chamber 40 are sent downward while repeatedly entering and leaving the large number of blast grooves 27, the difference in pressure distribution in the refining chamber 40 is reduced, and the rice grain is substantially averaged from the beginning to the end of the refining chamber 40. a pearling cracking line pressure, good rice efficiency, less broken rice occurs.

Furthermore, by the suction force of a fan, not shown in the噴風Mizo 27, the outside air intake tube 31, the guide body 30, outside air passing through the ventilation opening 22 of the helix rolls 28 and disc-shaped 23 is air jet Then, the bran powder peeled off from the rice grains is immediately removed from the bran removing net 36a into the bran removing chamber 39. Then, the bran in the bran removing chamber 39 is transported to a bag filter (not shown) through the bran collecting chamber 41 and the bran duct 15.

[0017] The grain of rice that led to the polished chamber 40 lower end (milled rice)
Is discharged from the grain discharge port 42 by being guided by the guide plate 46, and the resistance plate 45 urged by the weight 44
As a result, the rice grains are ejected against the resistance plate 45, and the rice plate is discharged by the action of the resistance plate 45.
The inside is maintained at an appropriate pressure.

FIG . 3 is a front view showing another embodiment of the bristle roll 17. That is, instead of the disc-shaped roll 23 near the grain discharge port 42 side, a split-shaped roll 55 having a thickness larger than the height of the blowing groove 27 is superposed and attached. Between the split-type rolls 55, it is conveyed to the same blast bag filter as described above.

[0019] The grain of rice that led to the polished chamber 40 lower end (milled rice)
Is discharged from the grain discharge port 42 by being guided by the guide plate 46, and the resistance plate 45 urged by the weight 44
As a result, the rice grains are ejected against the resistance plate 45, and the action of the resistance plate 45 allows the rice grain to be cleaned.
0 is maintained at an appropriate pressure.

FIG . 3 is a front view showing another embodiment of the bristle roll 17. That is, instead of the disc-shaped roll 23 near the grain discharge port 42 side, a split-shaped roll 55 having a thickness larger than the height of the blowing groove 27 is superposed and attached. A blast spacer 24 similar to that described above is interposed between the divided rolls 55. Thus, the pressing force of the resistance plate 45 urged toward the grain discharge port 42 is easily transmitted to the upper portion of the whitening chamber 40, and the pressure distribution in the whitening chamber 40 is more likely to be uniform.

In the above-described embodiment, the case where the grains are supplied from above the whitening chamber 40 and the white grains are discharged from below the whitening chamber 40 has been described. The grains may be supplied to discharge the refined grains from above. The length or shape of the arm portion 26 of the blast spacer 24 is not limited to the present embodiment.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a grinding type vertical grain mill of a preferred embodiment according to the present invention.

FIG. 2 is a sectional view taken along line AA of the vertical grinder of FIG.

FIG. 3 is a front view showing another embodiment of the Kongo roll.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grinding type vertical grain mill 5 Spindle 11 Bran collecting cylinder 13 Bran scraping blade 14 Bran discharge port 17 Kongo roll 23 Disc-shaped roll 24 Spouting spacer 27 Blowing groove 28 Spiral roll 36 Pulverizing cylinder 39 Pulping room 40 Refining room 41 Harvesting room 42 Grain discharge port 45 Resistance plate 50 Grain supply port 55 Split roll

Continuation of front page (56) References JP-A-54-35060 (JP, A) JP-A-4-118060 (JP, A) JP-A-4-118055 (JP, A) (58) Fields investigated (Int .Cl. ⁷ , DB name) B02B 3/06 104

Claims (1)

(57) [Claims] 1. A rotatably supports the main shaft in the upright bran-removing cylinder, injection a plurality of disc-shaped Kongo roll on top side of the main shaft
Pivotally attached to the heavy set via Kazemizo, cereal spiral roll feed connected to said plurality of Kongo rolls upper <br/> provided, wherein said bran removing cylinder
The grain supply part of the upper end of the milling chamber of the main portion between the plurality of Kongo rolls, each contact Then the lower end to the grain discharge section
In both abrasive type vertical grain milling machine to form a bran removing chamber by an outer sleeve surrounding said bran removing cylinder, Kongo roll of the grain discharge portion side, and the roll height greater than the thickness of the air jet groove On the other hand, a grinding type vertical grain mill characterized in that the thickness of the remaining rolls is smaller than the height of the blast grooves.