JP2002306979A - Roll machine for flour milling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll machine for flour milling in which a scraper being in contact with a roll surface has sufficient durability and is adaptable to the curvature of a roll having a curved (or polygonal) longitudinal section, such as camber. SOLUTION: In this roll machine, the scraper 21 for scraping off a milled material stuck to the roll 4 from it is divided into a plurality of scraper members 21A, 21B and 21A which are arranged in this order in the shaft direction of the roll 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mill for milling cereals, especially wheat, and more particularly to a scraper for scraping crushed material adhered to a mill roll.

[0002]

2. Description of the Related Art As a milling mill used in a mill, a so-called double roll mill having two sets of a pair of rolls in a frame is well known. Partitions are made to work independently. Further, such a milling roll machine is arranged such that a line connecting the centers of the roll shafts is horizontal, which is effective for feeding stock.

[0003] Further, in the above-mentioned roll of the milling roll machine, since the surface of the roll during the pulverization becomes high temperature, the moisture of the pulverized material evaporates and a state in which the pulverized material adheres occurs, and the pulverization performance of the roll is increased. May be reduced or vibration may occur. Therefore, the crushed material adhering to the roll surface is removed by the scraper.

[0004] By the way, the rolls of a milling roll machine expand more at both ends than at the center due to the heat of pulverization. Therefore, if the rolls are polished into a straight cylindrical shape, pulverization is mainly performed only at both ends. As a result, the crushing efficiency in the central part is reduced. In order to prevent this, the rolls of the milling mill are finished so that the diameters at both ends are several hundredths of mm smaller than the center. This is called camber, and the degree of camber varies depending on the length of the roll and the type of crushed material.
It is about 5/0 mm.

Conventionally, a scraper disclosed in Japanese Patent Publication No. 59-39187 has a blade having a blade having a length substantially equal to the direction of the rotation axis of a roll, and supporting the blade by projecting a blade surface connected to the blade. And a bendable blade beam having a length substantially equal to the length of the blade, rotation support means for supporting the blade beam, and counterweight means,
With a rod-shaped means, a blade-type scraper capable of controlling the pressing force of the blade of the blade to the outer peripheral surface of the roll,
Since the blade beam bends, it is possible to provide a blade-type scraper adapted to the bending of a roll such as the camber.

[0006]

However, in the scraper disclosed in Japanese Patent Publication No. 59-39187, uneven wear of the blade is caused by a portion that comes into contact with the roll for bending the blade beam and a portion that does not come into contact with the roll. Therefore, even if only a part of the blade is worn, it is necessary to replace the entire blade. Therefore, the blade had to be replaced in a relatively short time.

The present invention has been made in view of the above problems,
A technical object is to provide a milling roll machine that is durable and can be adapted to the bending of a roll such as the camber.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to at least a pair of milling rolls, and a crushed material adhered to each of the pair of milling rolls. And a scraper for scraping off the scraper, wherein the scraper is divided into a plurality of pieces in the axial direction of the roll.

Accordingly, when the scraper is brought into contact with the roll surface, it is not necessary to bend the scraper, and a material having high wear resistance and high hardness is used to adapt to the bending of the roll. The object can be completely peeled off and removed.

The pair of milling rolls are finished at both ends in a tapered shape smaller than the center portion in consideration of thermal expansion due to crushing heat, and the scraper is evenly applied to the milling rolls. The scraper is divided into a first scraper abutting on the center of the roll and a second scraper abutting on both ends of the roll so as to be in contact with each other.
Even in the case of a roll whose both ends are tapered thinner than the center of the roll in consideration of the thermal expansion due to the crushing heat, it is adapted to the bending of the roll and completely removes the crushed material attached to the roll surface. , Can be removed.

The plurality of scrapers are detachably inserted into and supported by the elongated holding portion. The elongated holding portion has a slit-like shape for inserting each of the scrapers. While drilling a groove in the longitudinal vertical section,
A plurality of screw holes for adjusting the height of each of the scrapers are drilled in the longitudinal direction by communicating with the slit-shaped groove portions. It is configured to be fitted with a notch provided at the lower end of the scraper and to allow the blades of each of the scrapers to independently move out of the holding portion by screwing or unscrewing the height adjusting screw. The individual scrapers can be independently attached to and detached from the holding portion, and when the scraper is worn for a long time, only the worn portion can be replaced. Furthermore, since the height of each scraper can be adjusted, the contact position between the outer peripheral surface of the roll and the scraper can be easily adjusted.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a central longitudinal sectional view of a double-type milling roll machine. Reference numeral 1 denotes a roll machine. One frame 2 is divided at the center by a middle partition plate 3 or the like.
It has a pair of rolls 4 and 5 symmetrically. The pair of rolls 4 and 5 are integrally formed as a pack,
Rolls 4 and 5 are provided with bearings, housings, seals, springs, roll gap adjusting devices, etc., so that the rolls can be exchanged quickly.

The structure of the roll pack will be described in detail. The moving bearing 6 is disposed near the partition plate 3 of the frame 2.
The fixed bearings 7 are respectively arranged on the outer side of the partition plate 3 of the frame 2, and the low-speed roll is mounted on the moving bearing 6 and the high-speed roll is mounted on the fixed bearing 7. The fixed bearing 7 is bolted. While the moving bearing 6 is fixed to the frame 2, about half of the moving bearing 6 on the fixed bearing 7 side is formed in the divided case 6 a, and the moving bearing 6 is detachably fixed to the moving bearing 6 with bolts. Furthermore,
At the lower end of the moving bearing 6, there is provided a roll gap which is pivotally attached to the frame 2 via a roll opening / closing eccentric ring 8 and which is connected to a roll opening / closing air cylinder 11 on an arm 10 which is mounted on a main shaft 9 of the eccentric ring 8. Adjustment means 12 is provided. Moving bearing 6
Is connected to the roll gap adjusting means 13 via a roll adjusting eccentric wheel 14 and a spring 15.

The front wall 16 connected to the upper portion of the frame 2 is mounted on the frame 2 by bolts so that the roll pack having the above-described structure can be quickly replaced and replaced from the frame 2. It should be a formula.

A grinding chamber 18 formed by surrounding the rolls 4 and 5 with a cover 17 has a lower part formed as an outflow hopper 19, and a delivery pipe 20 forming a transport path faces the inside of the outflow hopper 19. . In addition, scrapers 21 and 21 for scraping off the pulverized matter adhering to the rolls 4 and 5 are provided below the rolls 4 and 5, and the scrapers 21 and 21 are formed on the supports 22 and 22. It is a scraping plate made of steel such as spring steel and held by the holding portions 23 and 23.

Pressing means 25 comprising springs 24, 24 for pressing the scrapers 21, 21 against the rolls 4, 5 is connected to the lower portions of the supports 22, 22, and one ends of the springs 24, 24 are connected. Is connected to a tension adjusting device 25 including a connecting rod 26 and a nut 27 screwed to the connecting rod 26 in order to adjust the tension of the springs 24.

A contact / separation means 30 composed of an air cylinder is provided on the roll gap side of the supports 22, just below the roll gap. That is, when the fixing plate 29 fixed to the shaft 28 is engaged with the support plates 22 by moving the shaft 28 downward, the scrapers 21 and
1 is separated from the rolls 4 and 5, and the fixing plate 29 is separated from the supports 22 and 22 by the upward movement of the shaft 28.
Is pressed against the rolls 4 and 5 by the pulling force of the roller.

Grinding chamber 1 in which a pair of rolls 4 and 5 are arranged
Above 8, a stock supply means is provided. That is, a stock supply tube 31 made of a transparent wall is provided at the upper part of the frame 2, and the stock supply tube 31 is divided into two by a middle partition plate 32 to supply the stock to two pairs of rolls. 33, 33 are formed. The lower portions of the stock supply chambers 33, 33 are formed in a supply hopper 34, and two feed rolls 35, 36 driven by a motor (not shown) are provided in parallel at the lower end of the supply hopper 34. Then, one of the feed rolls 35, 3
6, a feeder gate plate 37 is provided. The feeder gate plate 37 is provided to be freely opened and closed by a feeder gate adjusting device 39 connected to a feeder gate opening / closing cylinder 38. Then, the feed roll 35,
A guide chute 40 is erected following 36, and the lower end thereof faces the gap between the rolls 4 and 5.

When the milling roll 4 is viewed in the axial direction (see FIG. 3), the roll end portions 4A, 4A expand more than the roll center portion 4B. In consideration of the above, both end portions 4A, 4A of the roll are finished in a tapered shape thinner than the center portion 4B of the roll. In other words, when the milling roll 4 is polished into a cylindrical shape, pulverization is mainly performed only at the roll end portions 4A, 4A, and the pulverization efficiency of the roll central portion 4B is reduced. In order to prevent this, the roll ends 4A, 4A are finished so that the diameter of the roll center portion 4B is smaller by several hundredths of a millimeter than the diameter of the roll center portion 4B. This is called Camber K,
The degree of the camber K varies depending on the length of the roll and the type of the pulverized material, but is generally about several hundredths of a millimeter to about 5/100 mm.

Roll 4 having such a camber K
On the other hand, the scraper 21 which makes contact with the outer periphery of the roll 4 and scrapes off the powder adhering to the roll 4 has a first scraper 21B which comes into contact with the roll center 4B and a first scraper 21B which comes into contact with the roll end portions 4A, 4A. 2 scrapers 21A, 2
1A (see FIG. 3).

Further, a plurality of scrapers 21A, 21
The slits B, 21A are provided in the elongated holding portion 23 so that the scrapers 21A, 21B, 21A can be inserted into the slit-shaped groove 41 in order to insert and support the elongated holding portion 23 in a detachable manner. Are formed in a longitudinal section in the longitudinal direction, and a plurality of screw holes 50 for adjusting the height of each of the scrapers 21 are formed in the longitudinal direction by communicating with the slit-shaped grooves 41 (FIG. 4).
reference). And the height adjusting screw 4 screwed into the screw hole 50
3 have their leading end portions 43a fitted with the cutout portions 42 provided at the lower end portions of the scrapers, and independently hold the blade surfaces 21a of the scrapers 21 by screwing or unscrewing the height adjusting screws 43. The unit 23 is configured to be able to exit. Reference numeral 44 denotes a wing nut for fixing the height adjusting screw 43, and reference numeral 45 denotes a spring washer.

Further, an inverted U-shaped chuck 46 is provided at an arbitrary position at the lower end of the scraper 21, and a fixing screw 47 to be inserted into the chuck 46 is connected to the holding portion 23 by screwing the fixing screw 47. Screwed into the holding portion 23
And works to fix the scraper 21 by narrowing the gap between the grooves 41. Reference numeral 48 is a spring washer, and reference numeral 49 is a washer.

Referring to FIG. 3, the holding portion 23 includes a roll 4
Is formed in a long shape over the length of the scraper 21, but only the scraper 21 is divided into three parts. Therefore, the first scraper 21B has three height adjusting screws 43B, 43B.
B, 43B, the blade surface is supported so as to be able to retreat from the holding portion 23, and the two second scrapers 21A are protruded from the holding portion 23 by two height adjusting screws 43A, 43A, respectively. It is supported to be able to retire,
The blade surface 21A of each of the three divided scrapers can independently move out of the holding portion 23. Further, the second scrapers 21A, 21A abut on the roll end portions 4A, 4A, so that the blade surface is inclined and supported by the holding portion 23 along the roll 4A.

The operation of the above embodiment will be described below.

When the feeder gate opening / closing cylinder 38 and the feeder gate adjusting device 39 are driven to open the feeder gate plate 37 and the feed rolls 35 and 36 are driven, the stock stored in the supply hopper 34 is guided through the guide chute 40. It is supplied to the gap between the rolls 4 and 5.
At the same time, the roll 4 is adjusted by the roll gap adjusting means 12 and 13.
Is moved to the roll 5 side and adjusted to an appropriate grinding gap.
In this state, when the rolls 4 and 5 are rotated inward each other, the stock is accurately pulverized between the rolls 4 and 5 and discharged downward to perform a continuous pulverizing operation.

In the above-mentioned crushing operation, when the air cylinder 30 as the contact / separation means is operated and the shaft 28 is moved upward, the scraper 21 is rotated outward by the pulling force of the spring 24 by the support 22. The scraper 21 is pressed into contact with the outer circumference of each of the rolls 4 and 5. Since the surface of the roll during the crushing is at a high temperature, the moisture of the crushed material evaporates, causing a state in which the crushed material adheres to the roll. Thereby, the pulverized matter adhering to the roll surface can be completely peeled off and removed.

Roll 4 having camber K shown in FIG.
In contrast, the scraper 21 having its tip in contact with the outer periphery of the roll 4 and scraping off the powder adhering to the roll 4 includes a first scraper 21B contacting the roll central portion 4B and a second scraper 21 contacting the roll end portions 4A, 4A. The scraper 21A is divided into three parts 21A, 21A, so that the roll central part 4B and the roll end parts 4A, 4A can be independently contacted. That is, unlike the conventional single-plate scraper, the contact with the roll end portions 4A, 4A, which is a tapered portion, is completed, and there is no fear (worry) that scraping remains. Further, the present invention uses a scraping plate made of steel such as ordinary spring steel, has abrasion resistance when abutting against the surface of the roll 4, and can be adapted to the bending of the roll such as the camber.

Further, since the scraper 21 is configured to be divided into three parts, the scraper 21 can be used for a long time.
Against wear, only the wear point (for example, scraper 2
1B) can be exchanged, and the use efficiency of the scraper 21 is improved.

For example, the procedure for replacing the scraper 21B will be described. When only the scraper 21B is worn out for replacement,
First, the clamping unit 23 is removed from the roll machine 1, moved to a wide place, and exchange work is started. First, a fixing screw 47 screwed into the holding portion 23 and a wing nut 44 at the bottom of the holding portion 23
To widen the gap between the grooves 41 of the holding portion 23 and make the height adjusting screw 43 movable (FIGS. 4 and 5).
reference). Then, the scraper 21 can move up and down with the height adjusting screw 43. However, since the notch 42 at the lower end of the scraper 21 is fitted to the tip 43a of the height adjusting screw 43, The scraper 21 can be removed together with the height adjusting screw 43 by removing the screw 43. Referring to FIG. 3, only the scraper 21B can be removed from the holding portion 23 by removing the height adjusting screw 43B. Next, when a new scraper 21B for replacement is assembled in the reverse order, the replacement operation is completed.
The height of the blade surface of the scraper 21B from the holding portion 23 is adjusted by the screwing amount of the height adjusting screw 43B, so that the contact with the roll 4B can be easily adjusted.

[0031]

As described above, according to the present invention, at least one pair of milling rolls, and a scraper that abuts the tip of each pair of milling rolls on the outer periphery of each roll and scrapes off the powder attached to each roll. Milling roll machine with
Since the scraper is divided into a plurality of pieces in the axial direction of the roll, when the scraper comes into contact with the roll surface, it is not necessary to bend the scraper, and the roll is bent using a hard material having abrasion resistance and high hardness. And the pulverized material adhered to the roll surface can be completely peeled off and removed.

Further, the pair of milling rolls are finished at both ends in a tapered shape smaller than the center portion in consideration of the thermal expansion due to the heat of crushing, and the scraper is evenly applied to the milling rolls. The scraper is divided into a first scraper abutting on the center of the roll and a second scraper abutting on both ends of the roll so as to be in contact with each other.
Even in the case of a roll whose both ends are tapered thinner than the center of the roll in consideration of the thermal expansion due to the crushing heat, it is adapted to the bending of the roll and completely removes the crushed material attached to the roll surface. , Can be removed.

The plurality of scrapers are detachably inserted into and supported by the elongated holding portion. The elongated holding portion has a slit-like shape for inserting each of the scrapers. While drilling a groove in the longitudinal vertical section,
A plurality of screw holes for adjusting the height of each of the scrapers are drilled in the longitudinal direction by communicating with the slit-shaped groove portions. Since the blades of each of the scrapers are configured to be fitted independently with the notch provided at the lower end of the scraper and to be independently retractable from the holding portion by screwing or unscrewing the height adjusting screw, The individual scrapers can be independently attached to and detached from the holding portion, and when the scraper is worn for a long time, only the worn portion can be replaced. Furthermore, the height of the blade surface of each scraper can be adjusted by the height adjusting screw, and the adjustment of the contact position with the outer peripheral surface of the roll can be easily performed.

[Brief description of the drawings]

FIG. 1 is a central vertical sectional view of a milling roll machine.

FIG. 2 is an enlarged view showing a contact / separation means of a scraper.

FIG. 3 is a schematic front view showing a milling roll machine and a scraper of the present invention.

FIG. 4 is a schematic longitudinal sectional view showing a scraper and a holding portion.

FIG. 5 is a schematic view showing a scraper and a height adjusting screw.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll machine 2 Frame 3 Middle partition plate 4 Roll 5 Roll 6 Moving bearing 7 Fixed bearing 8 Roll opening / closing eccentric wheel 9 Main shaft 10 Arm 11 Roll opening / closing air cylinder 12 Roll gap adjusting means 13 Roll gap adjusting means 14 Roll adjusting eccentricity Wheel 15 Spring 16 Front wall 17 Cover 18 Grinding chamber 19 Outflow hopper 20 Conveying pipe 21 Scraper 22 Supporting body 23 Holding part 24 Spring 25 Tension adjusting device 26 Connecting rod 27 Nut 28 Shaft 29 Fixing plate 30 Contacting / separating means 31 Stock supply Cylinder 32 Middle partition plate 33 Stock supply chamber 34 Supply hopper 35 Feed roll 36 Feed roll 37 Feeder gate plate 38 Cylinder for opening and closing feeder gate 39 Feeder gate adjusting device 40 Guide chute 41 Groove 42 Notch 43 Height adjustment ４４ 44 Wing nut 45 Spring washer 46 Chuck 47 Fixing screw 48 Spring washer 49 Washer 50 Screw hole

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Yasushi Hisamitsu 2-30 Saijo Nishihoncho, Higashihiroshima City, Hiroshima Prefecture Inside Satake Works Co., Ltd. (72) Akira Watashihashi 2-30 Saijo Nishihonmachi, Higashihiroshima City, Hiroshima Prefecture F-term in Satake Corporation (reference) 4D063 CC01 CC09 GA04

Claims (3)

[Claims] 1. A milling roll machine comprising at least a pair of milling rolls, and a scraper that abuts a leading end of each of the pair of milling rolls on the outer periphery of the rolls and scrapes off crushed material attached to each roll. Wherein the scraper is divided into a plurality of pieces in the axial direction of the roll. 2. A pair of milling rolls are finished at both ends in a tapered shape smaller than a central portion in consideration of thermal expansion due to crushing heat, and the scraper is evenly applied to the milling rolls. 2. The milling machine according to claim 1, wherein the scraper is divided into a first scraper in contact with the center of the roll and a second scraper in contact with both ends of the roll so as to make contact with the scraper. 3. 3. A slit-shaped slit for inserting each of the scrapers is provided in the elongated holding portion so that the plurality of scrapers are removably inserted into and supported by the elongated holding portion. A groove is formed in the longitudinal longitudinal section, and a plurality of screw holes for adjusting the height of each of the scrapers are formed in the longitudinal direction by communicating with the slit-shaped grooves, and screwed with the screw holes. The height adjusting screw has a tip portion fitted to a notch provided at the lower end of each of the scrapers, and the blades of each of the scrapers are independently inserted into the holding portion by screwing or unscrewing of the height adjusting screw. The milling roll machine according to claim 1 or 2, wherein the milling machine can be moved out of the machine.