JP2011143353A - Material leakage-inhibiting structure for roll mill apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a material leakage-inhibiting structure for a roll mill apparatus which has a simple structure to inhibit the apparatus from being stained with a pasted material leaked or scattered from the ends of a roll. <P>SOLUTION: A flange portion 122 provided at the end of an apron roll 24 includes a circumferential groove 130, the inner peripheral edge 200 of a scattering-preventing plate portion 192 is positioned on the inner peripheral side relative to the outer peripheral surface 202 of the flange portion 122, and the outer peripheral edge 204 of the scattering-preventing plate portion 192 is positioned on the outer peripheral side relative to the outer peripheral surface 202 of the flange portion 122. A processed material 206 located on the apron roll 24 and advancing to both ends of the apron roll scatters at a stepped part between the outer peripheral surface 202 and the circumferential groove 130 of the flange portion 122 where a wetted part is not present, but is caught by the scattering-preventing plate portion 192, and is dropped down in a receiving tray 92. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an improvement of a roll mill apparatus including a plurality of rolls, and more particularly to a structure that suppresses material leakage from a roll end.

  For example, insulating paste, conductive paste, phosphor paste, electronic paste such as glass paste, fine ceramics such as automotive electronics ceramic and electronic substrate ceramic, printer ink, porcelain coloring inorganic pigment, lacquer pigment and ink When manufacturing pharmaceutical products such as squid ink and ointment, a roll mill device such as a three roll mill provided with a plurality of rolls for the purpose of kneading or dispersing paste or viscous fluid is used (for example, (See Patent Documents 1 and 2).

  The above-mentioned three-roll mill is provided with three substantially cylindrical rolls (feed roll, center roll, apron roll) that are arranged in parallel so as to be rotatable around parallel axes and have a very small mutual interval. The pasty material supplied on the feed roll is scraped off from the apron roll and collected. These three rolls are set so that the adjacent rolls have different rotation directions and the rotation speed increases from the paste-like material supply side to the recovery side.

  For this reason, when the paste-like material is supplied onto the feed roll, the compressive action and the shearing action act in the gap between the feed roll and the center roll, so that the aggregated particles are broken and dispersed. At the same time, the paste-like material moves to the surface of the center roll having a relatively high rotational speed. Next, the paste-like material is also subjected to compression action and shearing action in the gap between the center roll and the apron roll, so that the dispersibility is further improved and the paste-like material moves to the apron roll surface having a relatively high rotational speed. The pasty material that has moved to the apron roll surface is scraped and collected by a doctor blade pressed against the surface at a position opposite to the center roll.

Japanese Utility Model Publication No. 06-085036 JP 2005-334680 A

  By the way, in the three-roll mill as described above, the paste-like material is supplied to the central portion in the axial direction of the roll, but the paste-like material subjected to the compression action with a very small gap between the rolls is the central portion of the roll. To both ends. The pasty material that reaches the end of the roll may flow along the surface of the roll, for example, and may adhere to the rotating shaft via the flange surface, thereby hindering the roll drive. Further, for example, the frame and the like may be soiled by scattering due to the centrifugal force generated by the roll rotation. It is difficult to clean these parts due to the structure of the three roll mill, and the viscosity of the paste-like material processed by the three roll mill is relatively high, so that a lot of labor and time are required for cleaning. There was a problem. In addition, for example, if the pressing force between the center roll and the apron roll is increased, it becomes difficult for the processing material to move to the apron roll, while if the pressing force is low, the processing material does not move to the apron roll and falls down. The pressure balance is delicately adjusted, it is difficult to set appropriate conditions, and it is difficult to prevent the processing material from flowing out and scattering.

  In Patent Documents 1 and 2, a mechanism for returning the pasty material at the end of the apron roll to the feed roll is proposed. For example, in Patent Document 1, a pair of end rolls rotating in opposite directions at higher speeds are pressed against both ends of an apron roll, and the paste-like material on the surface of these end rolls is scraped off with a scraper, and the center of the feed roll What is returned to the part is shown. Further, Patent Document 2 proposes a technique in which an edge scraper is pressed to positions near the center roll at both ends of the apron roll to scrape the paste-like material and return to the center of the feed roll through the center roll. Since paste materials that are not well dispersed tend to collect at the apron roll ends, they are intended to automatically reprocess such poorly dispersed paste materials, If the paste-like material at the end of the roll is scraped off, it is considered that the above-mentioned problem of adhesion to the rotating shaft and scattering are alleviated.

  However, in the roll mill described in Patent Document 1, it is necessary to drive the end roll at a higher speed than the apron roll and press it with an appropriate pressing force. According to the roll mill described in Patent Document 2 in which a scraper that is pressed against the end of the outer peripheral surface of the apron roll is added, the drive mechanism and the like are not particularly complicated. However, in order to drop the paste-like material scraped off in this configuration to the center of the feed roll, it is essential to form a substantially spherical guide surface on the scraper and to provide a side plate facing the roll side end surface. it is conceivable that. However, in order to prevent contamination, it is necessary to dispose the side plate so as not to contact the roll end face, and a gap is formed between them, so that the paste-like material leaks outside the roll end face. It is difficult to suppress. Further, since the paste-like material that has hit the side surface of the scraper is not scraped off, it adheres to the rotating shaft portion or scatters. For this reason, it was not possible to prevent the paste-like material from adhering to the rotating shaft and scattering.

  The present invention has been made against the background of the above circumstances, and its purpose is to suppress material leakage of a roll mill device that can suppress contamination of the device due to paste-like material leaking or splashing from the end of the roll with a simple configuration. To provide a structure.

  In order to achieve such an object, the gist of the present invention is that a plurality of cylindrical rolls, each of which is rotatably arranged around an axis parallel to each other, are provided on a supply-side roll. In the roll mill apparatus of the type that scrapes and collects the treated material from the roll on the take-out side, a material leakage suppression structure for suppressing the treatment material from leaking from the edge of the take-out side roll, a) a pair of stepped portions formed at both ends in the axial direction of the roll on the take-out side so that the diameter on both ends is smaller than the center side; and (b) the pair of stepped portions In the predetermined range in the circumferential direction of the roll on the take-out side, the pair of the distal end edge portion is located on the inner peripheral side from the outer peripheral surface of the large diameter portion and the base end edge portion is located on the outer peripheral side of the outer peripheral surface. A pair of shatterproofs projecting toward the small diameter part of the stepped part A stop plate.

  In this way, the both ends of the roll on the take-out side are provided with a pair of stepped portions having a smaller diameter at the both ends than the center side, and a pair of scattering toward the small diameter portion of the stepped portion. The prevention plate is protruded so that the outer peripheral surface of the stepped portion is located between the distal end edge portion and the proximal end edge portion. Therefore, the processing material from the central part toward both ends on the roll on the take-off side scatters because there is no wetted part at the stepped part when moving from the large diameter part of the stepped part to the small diameter part. . At this time, the anti-scattering plate projecting toward the small diameter portion of the stepped portion has its tip edge located on the inner peripheral side with respect to the large diameter portion of the stepped portion, and the base end edge has its large diameter. Since it is located on the outer peripheral side of the part, the scattered processing material is captured by the scattering prevention plate. Therefore, only by providing the anti-scattering plate, it is possible to suppress the processing material reaching the end of the roll from being scattered from it and contaminating the frame, or moving along the surface and adhering to the rotating shaft. That is, it is possible to obtain a roll mill apparatus with a simple configuration that suppresses contamination of the apparatus due to the processing material leaked or scattered from the roll end.

  Here, preferably, in the material leakage suppressing structure of the roll mill device, the pair of stepped portions is formed by a pair of circumferential grooves provided at both ends in the axial direction of the roll on the take-out side. There is a scraping plate for scraping off the processing material accumulated in the circumferential groove. In this way, when the processing material goes from the large diameter portion of the stepped portion to the small diameter portion, even if there is something that has flowed along the surface without scattering at those step portions, Since it is captured and scraped off by the scraping plate, it is possible to suppress the flow to the end side more than that, and further suppress the adhesion to the rotating shaft portion.

  Preferably, the scraping plate is located below the roll on the take-out side. In this way, since the processing material scraped off from the circumferential groove does not return to the roll, it may be mixed with the processing material scraped and collected by the doctor blade, and the quality of the processing material may deteriorate. It is suppressed. In addition, since the processing material is generally transferred from the preceding roll to the upper surface side of the roll on the take-out side and scraped off by the doctor blade on the upper surface side, a scraping plate should be arranged at the lower position of the roll. For example, there is an advantage that the recovery by the doctor blade and the recovery by the scraping plate are performed separately in the upper and lower sides.

  Preferably, the scraping plate is provided so as not to contact the circumferential groove. In this way, there is an advantage that foreign matter mixing due to the contact does not occur.

  The scattering prevention plate is located below the take-out side roll. In this way, since the processing material that has been scattered and adhered to the anti-scattering plate does not return onto the roll, it is mixed with the processing material that has been scraped and collected by the doctor blade, and the quality of the processing material is reduced. Is suppressed. In addition, the processing material is generally transferred from the preceding roll to the upper surface side of the roll on the take-out side, and is scraped off by a doctor blade on the upper surface side, so a scattering prevention plate should be placed at the lower position of the roll. For example, there is an advantage that the collection by the doctor blade and the collection by the scattering prevention plate are performed separately in the upper and lower sides. That is, it is preferable that both the scraping plate and the anti-scattering plate are arranged below the take-out side roll.

  More preferably, the scattering prevention plate is provided in a range in which a central angle extends from 90 to 150 ° on the lower side of the roll on the take-out side, that is, in a range from 1/4 turn to 5/12 turn. The scattering prevention plate only needs to be provided in a range where the processing material can be scattered, and the arrangement range can be appropriately determined so as not to interfere with other components in consideration of the roll size, the viscosity of the processing material, the processing amount, and the like. . If the anti-scattering plate is provided in a range of 1/4 or more, the anti-scattering plate is provided in substantially the entire area where the processing material can be scattered from the roll, so that contamination due to the scattering of the processing material can be sufficiently suppressed. In addition, interference with other components can be easily avoided by keeping it within the range of 5/12 rounds or less. Incidentally, in a roll mill apparatus, since the diameter of a plurality of rolls is generally uniform, the straight line connecting the axis of the take-out roll and the edge of the anti-scatter plate is the take-out roll and the roll adjacent to it. If the angle is 30 ° downward with respect to the straight line connecting the respective axes, the edge cannot interfere with the adjacent roll. Further, since the support mechanism of the doctor blade is located on or near the straight line connecting the axis of each of the take-out roll and the adjacent roll, the edge of the anti-scattering plate is located below the straight line. By doing so, interference with the support mechanism of the doctor blade can be easily avoided. Therefore, it is desirable that the scattering prevention plate has a maximum size of 5/12 rounds of the roll on the take-out side. In order to avoid interference with the support mechanism of the doctor blade more reliably, the straight line connecting the roll on the take-out side and the edge of the anti-scattering plate is also the straight line connecting the roll axis on the support mechanism side of the doctor blade. On the other hand, it is desirable that the central angle is 120 °, that is, a size of 1/3 round, so as to form 30 ° downward.

  Preferably, the scattering prevention plate is provided so as not to contact the outer peripheral surface of the small diameter portion of the stepped portion. In this way, there is an advantage that foreign matter mixing due to the contact does not occur.

  Preferably, the material leakage suppressing structure of the roll mill device is one in which the scattering prevention plate and the scraping plate are integrally provided. In this way, the configuration is further simplified as compared with the case where they are provided separately.

  Preferably, the stepped portion is provided on a flange provided at both ends of the take-out side roll. In general, both ends of the roll are provided with flanges for pivotally supporting the roll around the axis, but the treatment material directed to both ends of the roll further flows along the surface of the roll, After that, on the flange. Therefore, if the stepped portion is provided on the flange, the liquid contact portion is eliminated at the stepped portion between the large diameter portion and the small diameter portion of the stepped portion, so that the portion is scattered. In addition, because the flange is provided with a smaller diameter than the outer peripheral surface of the roll due to the structure of the roll mill device, it does not contact other rolls or flanges. The corner portion formed between the diameter portion and the small diameter portion is not deformed or worn by being pressed by another roll, flange, or the like, and does not cause contamination. Moreover, in the roll mill apparatus provided with the ceramic roll, it is easier to form the stepped portion on the metal flange than on the outer peripheral surface of the roll. Therefore, the stepped portion is not limited to the roll surface and can be provided on a flange or the like provided at the end portion, but it is particularly preferable to do so.

  Preferably, the anti-scattering plate has a circular arc shape along the outer peripheral surface of the small diameter portion of the stepped portion. If it does in this way, the whole scattering prevention board will function suitably for scattering prevention. In addition, it is preferable to form the base end edge portion of the anti-scattering plate in an arc shape concentric with the front end edge portion in order to ensure the anti-scattering function with a simple shape as much as possible.

  In addition, the length dimension in the roll radial direction from the front end edge to the base end edge of the anti-scatter plate depends on the roll diameter, the viscosity of the processing material, and the processing depending on the degree of scattering when the anti-scatter plate is not provided. Although it may be determined based on the amount or the like, for example, it is within a range of about 10 to 30 (mm).

  Preferably, the size of the step between the large diameter portion and the small diameter portion of the stepped portion is 3 (mm) or more. In order to easily locate the front end edge of the scattering prevention plate on the inner peripheral side rather than the large diameter portion without contacting the stepped portion, a step of 5 (mm) or more is more preferable. In this way, there is an advantage that it is easy to suppress scattering of the processing material while avoiding contamination by foreign matter due to wear. Note that the upper limit of the size of the step is not particularly limited from the viewpoint of preventing scattering, but is preferably smaller in order to ensure the mechanical strength of the component parts and ease of processing. Further, when the stepped portion is constituted by a circumferential groove, it is desirable from the same viewpoint that the groove width dimension is sufficiently larger than the thickness dimension of the scattering prevention plate. However, in the configuration in which the processing material collected in the circumferential groove is scraped off using a scraping plate, if the groove width dimension is excessively larger than the thickness dimension of the scraping plate, the processing material collected in the circumferential groove. Is less likely to be scraped off, and as a result, the effect of suppressing adhesion to the rotating shaft portion is reduced. Therefore, it is preferable that the groove width dimension is small as long as the scraping plate can be reliably prevented from contacting the inner wall surface.

  In addition, the scraping plate may have an appropriate shape, and the shape is not particularly limited. For example, the scraping plate may be a thin and elongated rectangular parallelepiped shape. The thickness dimension of the scraper plate in the circumferential direction of the roll can be appropriately determined as long as it has a mechanical strength that can scrape off the processing material adhering to the small diameter portion. A material having such a characteristic that bending occurs in the circumferential direction of the roll when the treatment material is scraped off may be used. Moreover, it is preferable that the width dimension in the roll axial direction of the scraping plate is increased within a range not contacting the inner wall surface of the circumferential groove.

  Moreover, the roll material of the roll mill apparatus which can apply this invention is not specifically limited, It applies similarly to the thing made from metals, such as chilled steel, and the things made from ceramics, such as an alumina. The ceramic roll may be entirely made of ceramics, or may be one in which a ceramic roll is fitted on the outer peripheral surface of a metal drum. In the present application, the “cylindrical roll” is subjected to crown processing in which the central portion in the axial direction is larger in diameter than the both ends in addition to a crownless roll having a uniform outer diameter. Also included.

  The present invention is preferably applied to a three-roll mill device including, for example, a feed roll, a center roll, and an apron roll, but is also applicable to a two-roll mill device and a roll mill device including four or more rolls. obtain.

It is a front view which shows the whole three roll mill of one Example of this invention. It is a left view which shows the whole three roll mill of FIG. It is a right view which shows the whole three roll mill of FIG. It is a top view which shows the whole three roll mill of FIG. It is a rear view which shows the whole three roll mill of FIG. It is a figure explaining a drive mechanism in the VI-VI cross section of FIG. It is a figure explaining a drive mechanism in the VII-VII view section of FIG. (a) is a figure which expands and shows the right flange part vicinity in FIG. 6 for demonstrating the arrangement | positioning state of the scattering prevention board in the three roll mill of one Example of this invention, (b) is (a). FIG. (a) is a front view of the scattering prevention board of FIG. 8, (b) is a right view in (a). It is a figure which shows the arrangement | positioning state of the scattering prevention board of FIG. It is a front view which shows the scattering prevention board of the other aspect used for the three roll mill of this invention. It is a figure which expands the flange part vicinity and shows the arrangement | positioning state of the scattering prevention board of FIG. 11 by a front view.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following embodiments, the drawings are appropriately simplified or modified, and the dimensional ratios, shapes, and the like of the respective parts are not necessarily drawn accurately.

  FIG. 1 is a front view showing an entire three-roll mill apparatus 10 to which the material leakage suppressing structure of the present invention is applied. FIGS. 2 to 5 are a left side view, a right side view, a plan view, and a rear view, respectively. is there. In these drawings, a three-roll mill device 10 includes a drive mechanism portion 14 provided with a drive motor 12 therein, a pair of leg portions 16 and 16 for supporting the drive mechanism portion 14 at both left and right ends in FIG. 1, and a drive mechanism portion. 14, three rolls supported at both ends by each of them, that is, a feed roll 20, a center roll 22, and an apron roll 24. In this embodiment, the apron roll 24 corresponds to the take-out roll, and the feed roll 20 corresponds to the supply roll.

  Each of the leg portions 16 has an inverted U shape in which both left and right end portions in FIGS. 2 and 3 protrude downward, and a wheel 26 and a fixed leg are respectively provided at the lower end portions of the four protruding portions. 28 is provided. FIG. 1 and the like show a state in use in which the fixed leg 28 protrudes slightly downward from the wheel 26. When the three-roll mill device 10 is moved, the wheel 26 is slightly protruded downward in accordance with the operation of a cylinder (not shown) provided in the leg portions 16 and 16.

  Further, bearing portions 30 and 32 are provided above the leg portions 16 and 16 at the upper end portion of the drive mechanism portion 14. The three rolls 20, 22, 24 are supported at both ends by these bearing portions 30, 32 in a state where the three rolls 20, 22, 24 can rotate about their respective axes. Further, the bearing portions 30 and 32 are respectively provided with pressure device operation handles 34 at both ends in the left-right direction in FIGS. 2 and 3, and a pressure gauge 36 is provided in the vicinity thereof. The pressurizing device operation handle 34 changes the axial center distance between the three rolls 20, 22, 24 by operating an internal mechanism which will be described later, and the mutual distance between the rolls 20, 22, 24 or their mutual pressing. It is for adjusting the pressure. The pressure gauge 36 is provided for displaying the pressing pressure.

  The rolls 20, 22, and 24 are made of, for example, an alumina ceramic cylinder, and have an outer dimension of about φ120 (mm) × 450 L (mm), for example. Between the feed roll 20 and the center roll 22, a pair of weir plates 38, 38 having a substantially pentagonal shape and having a lower end surface substantially along the surface of the rolls 20, 22, has the rolls 20, 22. Are provided at both ends. These barrier plates 38 and 38 are for suppressing the thrown processing material from spreading more than necessary in the axial direction of the rolls 20 and 22. As shown in FIGS. 1 to 3, a dam plate support device 40 is provided on the drive mechanism unit 14. The dam plate support device 40 includes guide rods 42 extending above the rolls 20 and 22 in the axial direction thereof, that is, in the left-right direction in FIG. 4, and the dam plates 38 and 38 are provided with the dam plate support device 40. Thus, the rolls 20 and 22 can be suspended at arbitrary positions in the axial direction.

  Further, a doctor 44 is provided on the opposite side of the apron roll 24 from the center roll 22 as shown in FIGS. The doctor 44 is made of, for example, stainless steel, and a blade (not shown) made of alumina ceramic, for example, is attached to the tip portion on the apron roll 24 side. A pair of holding screws 46, 46 are provided at both ends of the doctor 44, and the tip blade is pressed against the surface of the apron roll 24 by screwing them. The length of the blade is slightly longer than the axial length of the cylindrical outer peripheral surface of the apron roll 24 so that the blade is pressed against the outer peripheral surface over the entire length of the apron roll 24 in the axial direction. Yes.

  A cradle 50 having a horizontal receiving surface is fixed to the wall surface of the drive mechanism unit 14 by screwing or the like below the doctor 44. The doctor 44 is for scraping and collecting the material on the apron roll 24, and a container (not shown) for receiving the scraped material is placed on the cradle 50.

  Further, a switch box 56 having a start button 52 and a stop button 54 is attached to the side surface of the bearing portion 32 located on the right side in FIG. As shown in FIG. 2 and the like, a similar switch box 58 is also provided on the bearing portion 30 on the back side, and can be started and stopped from either the front side or the back side.

  Further, an emergency stop button 60 is provided on the upper surface of the bearing portion 30 located on the left side in FIG. As shown in FIGS. 3 and 5, a similar emergency stop button 62 is provided on the bearing portion 32 on the back side. Therefore, the emergency stop operation can be performed from either the front side or the back side, as in the normal start and stop operations.

  Further, a transparent cover 64 is attached above the rolls 20, 22, and 24 to cover them. The portion of the cover 64 that is directly above the gap between the feed roll 20 and the center roll 22 is cut out into a substantially rectangular shape, and the substantially rectangular hole 66 is provided as a material inlet as described later. It is closed by a lid 68 that can be lifted and opened. In addition, the said dam plates 38 and 38 are arrange | positioned outside the said material insertion port 66, for example.

  Further, a water supply / drainage mechanism 70 for cooling the rolls 20, 22, 24 is provided on the side surface of the bearing portion 30 located on the left side in FIG. 1. Each of the rolls 20, 22, and 24 has a hollow cylindrical shape, and is cooled by supplying cooling water to the inside through the water supply hoses 72, 74, and 76 (see FIG. 2) of the water supply and drainage mechanism 70. It is like that. The supplied cooling water is discharged through the drain hose 78. In addition, although the drainage hose is provided with respect to each of the rolls 20, 22, and 24 similarly to the water supply hose, only one front is shown in FIG. The amount of water supplied from the water supply hoses 72, 74, 76 can be adjusted individually by the liquid amount adjusting valves 80, 82, 84. By adjusting the amount of water supplied to each roll 20, 22, 24, the roll temperature can be increased. It is possible to suppress the increase in the temperature of the processing material.

  1, 4, and 5, 86 is a control panel in which a control circuit, a switch, a meter, and the like are accommodated. The manual operation handle 88 shown in FIGS. 2 and 3 is attached by being inserted from the insertion port 90 shown in FIG. 3 as necessary. When removing foreign matter or cleaning, the handle 88 is used. The rolls 20, 22, and 24 can be manually rotated by a necessary amount.

  As shown in FIGS. 1 and 5, a tray 92 is provided below the rolls 20, 22, and 24. The processing material dropped from between the rolls 20 and 22 or between the rolls 22 and 24 is received by the tray 92.

  As shown in FIGS. 1 and 2, a timing belt 96 is wound around the drive pulley 94 of the drive motor 12, and the driven pulley of the reduction gear whose rotation is larger than that of the drive pulley 94. 98. As will be described later, the rolls 20, 22, and 24 are rotated by the rotation of the drive motor 12 being transmitted through a reduction gear.

  1 and 2, the water supply hoses 72, 74, and 76, the drainage hose 78, and the like are rotated by rotary joints 104, 106, and 108, and the rotation shafts of the rolls 20, 22, and 24 (that is, a fifth shaft described later). 158, the third shaft 148, and the second shaft 126).

  FIG. 6 shows a main part of the section taken along the line VI-VI in FIG. 2, and the water supply / drainage mechanism 70, the control panel 86, the legs 16, 16 and the cover 64 are omitted. In FIG. 6, the driven pulley 98 is fitted to one end of the shaft 110 in the bearing portion 30. The shaft 110 is supported at both ends by a bearing unit 112, 112 so as to be rotatable around its axis, and a first gear 114 having a smaller diameter than the driven pulley 98 is fitted to the other end. The first gear 114 is meshed with a second gear 118 fitted to the first shaft 116 of the apron roll 24.

  The first shaft 116 is a flanged shaft provided with a flange portion 120 at one end. The apron roll 24 has a plurality of flange portions 120 at one end and a plurality of flange portions 122 at the other end, for example, the second shaft 126. These are respectively fitted with four bolts 124. The second shaft 126 and the third shaft 148 to the sixth shaft 160 (see FIG. 7) to be described later are all flanged shafts like the first shaft 116. The flange portions 120 and 122 have, for example, an outer diameter of about 114 (mm) and a thickness of about 20 (mm). For example, it is provided with a uniform opening width of about 10 (mm) and a depth of about 5 (mm). The flange outer diameter is slightly smaller than the roll outer diameter. In this embodiment, the circumferential grooves 128 and 130 correspond to “a pair of stepped portions”.

  Further, the first shaft 116 and the second shaft 126 are supported by bearing units 132 and 132 so as to be rotatable around the axis, respectively, and the second shaft 126 has a smaller diameter than the second gear 118. The third gear 134 is fitted.

  Further, the second shaft 126 is provided with a through hole 136 penetrating in the axial direction thereof, and the first shaft 116 is provided with a bottomed hole 138 at a position corresponding to the through hole 136 of the flange portion 120. The apron roll 24 is provided with a water supply pipe 140 that passes through the through hole 136 of the second shaft 126 and has a tip portion positioned in the bottomed hole 138. The water supply pipe 140 is connected to the water supply hose 76 through the rotary joint 108, and the cooling water supplied from the water supply hose 76 is supplied from the discharge holes provided in the water supply pipe 140 through the apron roll 24. It is discharged inside. The discharged cooling water is returned to the drainage hose 78 through the gap between the through hole 136 and the water supply pipe 140.

  FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. 1, and components provided below the bearing portions 30 and 32 and the rolls 20, 22, and 24 are omitted. FIG. 6 corresponds to the VI view in FIG. In FIG. 7, the center roll 22 is similar to the apron roll 24 in that the flange 142 of the third shaft 148 is at one end and the flange 144 of the fourth shaft 150 is, for example, four bolts 146 at the other end. Each is fitted. In addition, the feed roll 20 is also provided with a flange portion 152 of the fifth shaft 158 at one end and a flange portion 154 of the sixth shaft 160 at the other end, for example, four bolts, like the center roll 22 and the apron roll 24. 156, respectively. The flange portions 142, 144, 152, 154 fitted to the feed roll 20 and the center roll 22 are not provided with any circumferential grooves 128, 130 as provided in the flange portions 120, 122. .

  The third shaft 148, the fourth shaft 150, the fifth shaft 158, and the sixth shaft 160 are supported by bearing units 162, 162, 164, and 164, respectively, so as to be rotatable about the axis. A fourth gear 166 meshed with the third gear 134 is fitted to the third shaft 148, and a fifth gear 168 is fitted closer to the shaft end than the fourth gear 166. The fifth gear 168 has the same outer diameter as the third gear 134, and the fourth gear 166 has a larger diameter.

  A sixth gear 170 meshed with the fifth gear 168 is fitted to the fifth shaft 158 of the feed roll 20. The sixth gear 170 has the same outer diameter as the fourth gear 166. In addition, a rotary encoder 174 is attached to the sixth shaft 160 via a lateral coupling 172 so that the rotational speed of the feed roll 20 can be detected.

  Thus, the rotation of the apron roll 24 is transmitted to the center roll 22 via the small diameter third gear 134 and the large diameter fourth gear 166, and then the rotation of the center roll 22 is reduced to the small diameter fifth gear 168 and It is transmitted to the feed roll 20 through the sixth gear 170 having a large diameter. Therefore, the rotation speed of each roll 20, 22, 24 is decelerated according to the gear ratio, and the rotation speed increases in the order of the feed roll 20, the center roll 22, and the apron roll 24. The rotation speed ratio is set to about 1: 3: 9, for example.

  The feed roll 20 and the center roll 22 are also provided with water supply pipes 176 and 178 so that the feed roll 20 and the center roll 22 can be supplied and drained into the roll through the third shaft 148 and the fifth shaft 158 in the same manner as the apron roll 24. .

  In addition, pinions 182 are fitted on the tip portions of the shafts 180 to which the handles 34 are respectively attached. The pinion 182 is meshed with a pinion 188 screwed into the screw shaft 186 of the slider device 184. When the screw shaft 186 moves back and forth in FIG. The fixed bearing units 132 and 164 move in the same direction. Thereby, the space | interval of the axial center of the center roll 22 and the axial center of the feed roll 20 and the apron roll 24 is changed, and the magnitude | size of the clearance gap between rolls and the pressing pressure between rolls are changed. The pressing pressure is detected by oil pressure and displayed on the pressure gauge 36.

  By the way, the circumferential grooves 128 and 130 of the flange portions 120 and 122 of the apron roll 24 are shown in FIG. 8 (a) in an enlarged manner in the vicinity of the flange portion 122 in FIG. 190 is provided. In FIG. 8A and FIG. 8B showing the right side surface thereof, reference numeral 195 denotes a bearing cover attached to the bearing portion 30 (not shown in FIG. 8) to cover the vicinity of the bearing of the second shaft 126. Thus, a scattering prevention plate fixing plate 196 is fixed to the lower end portion of the bearing cover 195 with a bolt 197. The contamination prevention plate 190 has an arcuate scattering prevention plate portion 192 having an inner diameter of about 108 (mm), an outer diameter of about 168 (mm), and a width of about 30 (mm) in the radial direction, And a scraping plate portion 194 provided in a part of the circumferential direction. The scattering prevention plate portion 192 is fixed to the scattering prevention plate fixing plate 196 by welding or the like, so that the scattering prevention plate The bearing cover 195 is attached via a fixed plate 196.

  9A and 9B are diagrams for explaining the configuration of the contamination prevention plate 190, wherein FIG. 9A is a front view and FIG. 9B is a side view thereof. The anti-scattering plate portion 192 is a thin plate having a thickness dimension of about 2 (mm), and the above-described inner diameter dimension is slightly larger than the outer dimension of the bottom surfaces of the circumferential grooves 128 and 130. Further, the scraping plate portion 194 has a square bar shape having a width dimension of about 6 (mm), a length dimension of about 50 (mm), and a thickness dimension of about 2 (mm). Therefore, the overall thickness dimension of the contamination prevention plate 190 is about 8 (mm), for example, which is slightly smaller than the opening width dimension of the circumferential grooves 128 and 130. Further, the tip end surface of the scraping plate portion 194 is located on the inner peripheral edge of the scattering prevention plate portion 192. The contamination prevention plate 190 is integrated by, for example, welding the scraping plate portion 194 to one surface of the anti-scattering plate portion 192. For example, both are made of stainless steel. As shown in FIG. 8B, the edge on the center roll 22 side of the anti-scattering plate portion 192 is a straight line connecting the axes of the apron roll 24 and the axes of the apron roll 24 and the center roll 22. An angle α is formed with respect to the opposite edge, and an angle β is formed in the opposite direction with respect to the straight line. The angles α and β are determined to be as small as possible within a range where they do not interfere with the center roll 22 and the doctor 44, and are 30 ° in this embodiment. Therefore, the center angle of the scattering prevention plate portion 192 is 120 °. Further, the scraping plate portion 194 has an angle of, for example, about 20 ° in the clockwise direction in FIG. 8B (that is, the direction opposite to the rotation direction of the apron roll 24) with respect to the perpendicular line drawn from the axis of the apron roll 24. It is attached at a position inclined by γ. The scattering prevention plate fixing plate 196 is located between the edge of the scattering prevention plate portion 192 on the doctor 44 side and the scraping plate portion 194.

  FIG. 10 is a diagram schematically showing the arrangement state of the contamination prevention plate 190 by enlarging the main part of FIG. In FIG. 10, the scattering prevention plate fixing plate 196 is omitted. The contamination prevention plate 190 is disposed such that the tip surface of the scraping plate portion 194 is slightly separated from the bottom surface 198 of the circumferential groove 130. Further, as described above, the thickness dimension of the pollution prevention plate 190 is slightly smaller than the opening width dimension of the circumferential groove 130. However, in the illustrated arrangement state, the side surface of the pollution prevention plate 190 is the same as that of the circumferential groove 130. There is no contact with the inner wall. As a result, the inner peripheral edge 200 of the anti-scattering plate portion 192, that is, the front edge portion is located on the inner peripheral side of the outer peripheral surface 202 of the flange portion 122, and the outer peripheral edge 204 of the anti-scattering plate portion 192, that is, the base end edge portion is The flange portion 122 is located on the outer peripheral side of the outer peripheral surface 202. On the flange 120 side (not shown), the contamination prevention plate 190 is arranged in the same state.

  When performing the dispersion / kneading treatment on the paste material for ceramic products and the paste-like treatment material 206 (see FIGS. 8 and 10) using the three roll mill device 10 configured as described above, The handle 34 is operated so that the feed roll 20 and the center roll 22 are slightly separated and the center roll 22 and the apron roll 24 are slightly separated. Next, the cooling water is introduced into the rolls 20, 22, 24 by operating the flow rate adjusting valves 80, 82, 84 of the water supply / drainage mechanism 70, and the rolls 20, 22, 24 are rotated by operating the start button 52. After starting the rotation, the processing material 206 is loaded from the material loading port 66, and the handle 34 is quickly operated so that the feed roll 20 is pressed against the center roll 22. At this time, the pressure gauges 36 in the vicinity of both the handles 34 on the feed roll 20 side are monitored, and the handle operation amount is adjusted so that the displayed pressure becomes the same.

  When the feed roll 20 is pressed against the center roll 22 in this way, the processing material 206 supplied between the feed roll 20 and the center roll 22 rotates between them as shown by the one-dot chain line in FIG. It is expanded or crushed while receiving a shearing force corresponding to the speed difference. And it is taken up by the center roll 22 with the relatively high rotational speed, and is stuck to the outer peripheral surface and goes between the center roll 22 and the apron roll 24. After the processing material 206 reaches the gap between them, when the handle 34 on the apron roll 24 side is operated and the apron roll 24 is pressed against the center roll 22, the same applies to the center roll 22 and the apron roll 24. The treatment material 206 is expanded or crushed while receiving a shearing force and taken up to the apron roll 24 side. The treatment material 206 on the apron roll 24 is scraped by the doctor 44 and collected. The contamination prevention plate 190 is provided in a range over approximately 1/3 of the circumference after the processing material 206 of the apron roll 24 is scraped off.

  At this time, the processing material 206 on the apron roll 24 is directed to both ends in the axial direction by being pressed between the rolls 22 and 24. FIG. 10 described above shows a state in which the processing material 206 reaches the end of the apron roll 24 and spreads on the flange portion 122. A part of the processing material 206 that reaches the end of the roll scatters as a droplet 208. The scattering direction is inclined with respect to the direction in which the force acting in the axial direction according to the pressing force between the rolls 22 and 24 and the centrifugal force are combined, that is, the axial direction of the apron roll 24 and its end portion. It becomes the direction of arrow A in the figure toward the side. Since the splash prevention plate portion 192 is disposed in the splash direction of the splash 208, the splash 208 hits the splash prevention plate portion 192 and falls to the tray 92. As is clear from the above description, in the present embodiment, the step between the apron roll 24 and the flange portions 120 and 122 also corresponds to the stepped portion. As shown in FIG. 10, the outer peripheral edge 204 of the anti-scattering plate portion 192 is located outside the outermost peripheral edge of the stepped portion, that is, the outer peripheral surface of the apron roll 24.

  In addition, the processing material 206 that has flowed from the apron roll 24 surface to the flange portion 122 surface without splashing partially loses the liquid contact portion at the boundary corner between the flange portion outer peripheral surface 202 and the peripheral groove 130 inner wall surface. To the direction of arrow B along the flow direction. As shown by the arrow C, the remaining portion flows along the inner wall surface of the circumferential groove 130 along the surface and accumulates in the circumferential groove 130. The scattered treatment material 206 is dropped by the splash prevention plate portion 192 in the same manner as the splash 208 shown by the arrow A. However, the treatment material 206 accumulated in the circumferential groove 130 is scraped off by the scraping plate portion 194, both of which are trays. Fall to 92. Therefore, the processing material 206 having the surface of the apron roll 24 facing the end in the axial direction is dropped on the tray 92 by the contamination prevention plate 190 when it comes out of the apron roll 24, so that the apron roll 24 Reaching the rotating shaft is suppressed. Since the distance between the end surfaces of the flange portions 120 and 122 and the bearing portion is as small as about 15 to 20 mm, for example, in the conventional structure in which the contamination prevention plate 190 is not provided, the rotating shaft portion is contaminated by the scattered processing material 206. As a result, the roll drive is hindered, and the treatment material 206 has a relatively high viscosity, which makes it difficult to carry out the washing treatment, requiring a lot of washing time. According to the present embodiment, any of these disadvantages can be eliminated or alleviated.

  In short, according to the present embodiment, the flange portions 120 and 122 provided at both ends of the apron roll 24 are provided with a pair of circumferential grooves 128 and 130, and the inner peripheral edge 200 of the scattering prevention plate portion 192 is: The outer peripheral edge 204 of the anti-scattering plate 192 is positioned on the outer peripheral side of the outer peripheral surface 202 of the flange portions 120 and 122, and the outer peripheral edge 204 of the scattering prevention plate 192 is positioned on the outer peripheral side. Therefore, the processing material 206 directed to both ends on the apron roll 24 is scattered because the liquid contact portion is eliminated at the step portion between the outer peripheral surface 202 of the flange portions 120 and 122 and the peripheral grooves 128 and 130. Is captured by the anti-scattering plate portion 192 arranged in this manner and dropped onto the tray 92. Therefore, just by providing the pollution prevention plate 190 provided with the scattering prevention plate portion 192, the processing material 206 reaching the end of the apron roll 24 may be scattered from the soiling of the bearing portions 30, 32, etc. Movement along the surface is prevented from adhering to the first shaft 116, the second shaft 126, and the like. That is, the roll mill device 10 is obtained in which the contamination of the device by the processing material 206 leaked or scattered from the end of the apron roll 24 with a simple configuration is suppressed.

  In addition, according to the present embodiment, the roll mill device 10 has the stepped portion for eliminating the liquid contact portion in the flow direction of the processing material 206 formed by the circumferential grooves 128 and 130 of the flange portions 120 and 122, A scraping plate portion 194 for scraping off the processing material 206 accumulated in the circumferential grooves 128 and 130 is provided. Therefore, since the processing material 206 that has flowed along the surfaces of the flange portions 120 and 122 is captured by the circumferential grooves 128 and 130 and scraped off by the scraping plate portion 194, it is suppressed from flowing to the end side. As a result, adhesion to the rotating shaft portion is further suppressed. When the amount of the processing material 206 is large or the viscosity thereof is high, the flow into the circumferential grooves 128 and 130 is likely to occur as described above. Therefore, the effect of providing the scraping plate portion 194 is in such a case. Remarkably obtained.

  In addition, when scraping off the processing material 206 in the circumferential grooves 128 and 130 with the scraping plate portion 194 as described above, the scraping plate portion 194 does not contact the bottom surface 198 of the circumferential grooves 128 and 130 as described above. There is no possibility that the flange portions 120 and 122 and the scraping plate portion 194 are worn and the wear powder is mixed into the processing material 206.

  FIG. 11 is a front view showing a contamination prevention plate 210 used in the three-roll mill device 10 of another embodiment. The contamination prevention plate 210 has the same shape as the anti-scattering plate portion 192 of the contamination prevention plate 190, and the contamination prevention plate 210 is not provided with an equivalent to the scraping plate portion 194.

  FIG. 12 is a diagram schematically showing the main part by enlarging the vicinity of the flange part 216 provided in place of the flange part 122 in the arrangement state of the contamination prevention plate 210 of FIG. The contamination prevention plate 210 is also attached to the bearing cover 195 in the same manner as the contamination prevention plate 190, and is disposed and used so that the inner peripheral edge 220 is positioned in the circumferential groove 218 provided in the flange portion 216. The inner peripheral edge 220 is positioned on the outer peripheral side with respect to the bottom surface 222 of the peripheral groove 218 and on the inner peripheral side with respect to the outer peripheral surface 202 of the flange portion 216. The outer peripheral edge 224 is positioned on the outer peripheral side of the outer peripheral surface 202 of the flange portion 216 and on the outer peripheral side of the outer peripheral surface of the apron roll 24. Also in this embodiment, the opening width dimension of the circumferential groove 218 is determined in accordance with the thickness dimension of the contamination prevention plate 210. That is, as described above, the opening width dimension of the circumferential groove 218 is the thickness of the pollution prevention plate 210 so that the inner peripheral edge of the pollution prevention plate 210 can be positioned in the circumferential groove 218 in a non-contact state with the inner wall surface. It is slightly larger than the dimensions.

  When the contamination prevention plate 210 configured in this way is used in the roll mill device 10, since it has the same shape as the scattering prevention plate portion 192 provided in the contamination prevention plate 190, FIG. As shown by the arrows A and B, the splash 208 of the processing material 206 that scatters hits the contamination prevention plate 210 and is dropped on the tray 92 in the same manner as when the contamination prevention plate 190 is used. Therefore, the same contamination suppression effect as in the above embodiment can be obtained.

  However, the contamination prevention plate 210 is provided with a component corresponding to the scraping plate portion 194 that scrapes off the processing material 206 that has flowed into the circumferential groove 218 along the surface of the flange portion 216 as indicated by an arrow C. Absent. However, when the amount of the treatment material 206 toward the roll end is sufficiently small and the viscosity thereof is sufficiently low, the treatment material 206 is difficult to flow into the circumferential groove 218. There is a prevention effect. Even in this embodiment, a part of the processing material 206 that has flowed into the circumferential groove 218 can be scraped off by the contamination prevention plate 210.

  As mentioned above, although this invention was demonstrated in detail with reference to drawings, this invention can be implemented also in another aspect, A various change can be added in the range which does not deviate from the main point.

  10: Three-roll mill device, 20: Feed roll, 22: Center roll, 24: Apron roll, 92: Receptacle, 120, 122: Flange, 128, 130: Circumferential groove, 190: Antifouling plate, 192: Prevention of scattering Plate portion, 194: scraping plate portion, 198: bottom surface, 200: inner peripheral edge, 202: outer peripheral surface, 204: outer peripheral edge, 206: treatment material

Claims (8)

A plurality of cylindrical rolls, each of which is rotatably arranged around an axis parallel to each other, and is used to scrape and collect the processing material supplied on the supply-side roll from the output-side roll In the roll mill apparatus, the material leakage suppressing structure for suppressing the treatment material from leaking from the edge of the roll on the take-out side,
A pair of stepped portions formed at both ends in the axial direction of the roll on the take-out side so that both ends have a smaller diameter than the center; and
The circumferential direction of the roll on the take-out side so that the leading edge is located on the inner circumferential side from the outer circumferential surface of the large diameter portion of the pair of stepped portions and the proximal edge is located on the outer circumferential side from the outer circumferential surface A material leakage suppressing structure for a roll mill device, comprising: a pair of scattering prevention plates projecting toward a small diameter portion of the pair of stepped portions in the predetermined range. The pair of stepped portions are formed by a pair of circumferential grooves provided at both ends in the axial direction of the roll on the take-out side,
2. The material leakage suppression structure for a roll mill apparatus according to claim 1, further comprising a scraping plate for scraping off the processing material accumulated in the circumferential groove.   3. The material leakage suppressing structure for a roll mill apparatus according to claim 2, wherein the scraping plate is located below the roll on the take-out side.   The material leakage suppression structure for a roll mill device according to claim 2 or 3, wherein the scraping plate is provided in a state where it does not contact the circumferential groove.   The material leakage suppression structure for a roll mill apparatus according to any one of claims 1 to 4, wherein the scattering prevention plate is positioned below the roll on the take-out side.   The material leakage suppression structure for a roll mill device according to any one of claims 1 to 5, wherein the scattering prevention plate is provided so as not to contact an outer peripheral surface of a small diameter portion of the stepped portion.   The material leakage suppression structure for a roll mill device according to any one of claims 2 to 6, wherein the scattering prevention plate and the scraping plate are integrally provided.   The material leakage suppressing structure for a roll mill apparatus according to any one of claims 1 to 7, wherein the stepped portion is provided on flanges provided at both ends of the take-out side roll.

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