JP2011173684A - Guide roller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guide roller capable of improving performance of carrying a film. <P>SOLUTION: In this guide roller, an outer peripheral surface 1a includes a first multiple thread groove 10 formed in a spiral shape and a second multiple thread groove 20 formed in a spiral shape in counter-rotation of the first multiple thread groove 10. When adopting the multiple thread grooves 10 and 20, an intersection CP of crossing the mutual grooves is uniformly formed in the peripheral direction over the whole periphery of the outer peripheral surface 1a as indicated in Fig.4. Thus, frictional force becomes constant regardless of an area of contacting with the film F as compared with a case of adopting a single thread groove. The grooves can also be densely formed without reducing an angle of the grooves in the peripheral direction by adopting the multiple thread grooves 10 and 20. Thus, rolled-in air can be sufficiently released while preventing damage of the film F. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a guide roller that conveys the film by contacting the film in a partial region in the circumferential direction of the outer peripheral surface.

  Conventionally, a guide roller disclosed in Patent Document 1 is known as a guide roller that conveys the film by contacting the film on the outer peripheral surface. The guide roller has a single groove formed in a spiral shape on the outer peripheral surface of a metal cylindrical member. In this guide roller, protrusions are formed on the outer peripheral surface by forming grooves. Thus, the conventional guide roller increases the frictional force on the outer peripheral surface and facilitates the conveyance of the film.

Japanese Patent Laid-Open No. 02-158538

  However, when protrusions are formed on the outer peripheral surface of the roller, there is a problem that the film is easily damaged. On the other hand, a smooth guide roller having no irregularities on the outer peripheral surface may cause air to be caught between the film and the outer peripheral surface, which may reduce the frictional force. Therefore, it is conceivable to form a spiral groove on the outer peripheral surface of the guide roller to form a path for air to escape. However, a guide roller in which a spiral groove is simply formed on the outer peripheral surface may cause frictional fluctuations and film meandering. Accordingly, there has been a demand for improving the film conveyance performance of the guide roller.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a guide roller capable of improving the film conveyance performance.

  The guide roller according to the present invention is a guide roller that conveys the film by making contact with the film in a partial region in the circumferential direction of the outer peripheral surface, and the outer peripheral surface extends from one end side to the other end side in the axial direction. A first multi-groove formed in a spiral toward the first multi-groove, and a second multi-groove formed in a spiral around the opposite side of the first multi-groove from one end side to the other end side in the axial direction It is characterized by having.

  The inventors of the present invention have found that there is the following problem when a single groove is employed as the spiral groove formed on the outer peripheral surface of the guide roller. When spiral grooves that rotate in opposite directions are formed, an intersection where the grooves intersect is formed. At such an intersection, the frictional force between the film and the guide roller decreases. Here, when a single groove is employed, as shown in FIGS. 6 and 7, the intersection is formed only at a position related to a specific phase in the circumferential direction. Accordingly, the frictional force increases when there is no intersection in the region in contact with the film, and the frictional force decreases when there is an intersection in the region in contact with the film. Thus, when a single groove | channel is employ | adopted, the fluctuation | variation of a frictional force may arise with the area | region which contacts a film. Furthermore, when a single groove is employed, the number of grooves that can be formed on the outer peripheral surface of the guide roller is small, and the entrained air may not be sufficiently released. On the other hand, when the pitch is reduced in order to form the grooves densely, the angle of the groove with respect to the circumferential direction of the guide roller becomes small, and the spiral groove becomes close to an annular groove. In such a case, a film will be conveyed along the edge of the opening part of a groove | channel, and it may become easy to damage. On the other hand, in the guide roller according to the present invention, the outer peripheral surface includes a first multi-groove formed in a spiral shape and a second multi-groove groove formed in a spiral shape around the first multi-groove groove. Have. When multi-slot grooves are employed, as shown in FIG. 4, the intersections where the grooves intersect are evenly formed in the circumferential direction. Therefore, the guide roller according to the present invention has a constant frictional force regardless of the region in contact with the film, as compared with the case where a single groove is employed. Furthermore, by using multi-slot grooves, the grooves can be formed densely without reducing the angle of the groove with respect to the circumferential direction. As a result, the guide roller according to the present invention can sufficiently release the entrained air while preventing the film from being damaged. In addition, since the first multi-groove and the second multi-groove that spiral in the opposite directions are formed on the outer peripheral surface of the guide roller, the air entrapped in the film and the guide roller escapes evenly from side to side Can do. Therefore, it is possible to prevent the film from being biased toward any one end side. As described above, according to the guide roller of the present invention, the film conveyance performance can be improved.

  Further, in the guide roller according to the present invention, the groove constituting the first multi-groove or the second multi-groove is T1 when the width of the groove opening in the axial direction is T1, and the groove pitch is P1. It is preferable to satisfy the relationship of <(P−T1). As shown in FIG. 5, the value obtained by subtracting the width T1 of the opening of the groove from the pitch P is equal to the distance T2 between adjacent grooves in the same multi-groove. That is, the relationship of T1 <T2 is satisfied. By satisfying this relationship, the width of the portion where the smooth surface portion having a smooth surface is formed between the grooves becomes larger. That is, the portion where the film and the smooth surface are in contact can be enlarged. As a result, it is possible to ensure the frictional force against the film while making it easy to escape the entrained air.

  According to the present invention, the film conveyance performance can be improved.

It is a schematic block diagram of the film conveying apparatus to which the guide roller which concerns on embodiment of this invention is applied. It is a perspective view of a guide roller concerning an embodiment of the present invention. It is a figure for demonstrating the number of stripes of a multiple groove. It is a figure which shows a mode that the outer peripheral surface of the guide roller was expand | deployed planarly. It is an expanded sectional view of the groove | channel formed in the outer peripheral surface of a guide roller. It is a figure which shows a mode that the outer peripheral surface of the guide roller which employ | adopted the single groove | channel was expand | deployed planarly. It is a figure which shows a mode that the outer peripheral surface of the guide roller which employ | adopted the single groove | channel was expand | deployed planarly.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted.

  With reference to FIGS. 1-5, the guide roller which concerns on embodiment of this invention is demonstrated in detail. FIG. 1 is a schematic configuration diagram of a film transport apparatus 100 to which a guide roller according to an embodiment of the present invention is applied. FIG. 2 is a perspective view of the guide roller 1 according to the embodiment of the present invention. FIG. 3 is a diagram for explaining the number of multi-grooves. FIG. 4 is a diagram illustrating a state in which the outer peripheral surface of the guide roller 1 is developed in a planar shape. FIG. 5 is an enlarged cross-sectional view of a groove formed on the outer peripheral surface of the guide roller 1.

  The conveying apparatus 100 is an apparatus that can form a ceramic green sheet used in a laminated ceramic component or the like on a film and wind the film. As shown in FIG. 1, the roll-shaped film F is fed out from a rotating supply reel 100A. The film F fed from the feed reel 100A is adjusted in tension in the traveling direction by the tension control device 100B, and is adjusted in the width direction by the tension distribution correcting device 100C. Thereafter, the ceramic paste is applied to the surface of the film F by the coating apparatus 100F while being guided by the guide roller 100E. After being applied, the film F is conveyed by the suction roller 100G and dried by the drying device 100H. When the ceramic paste is dried by the drying device, the film F is subjected to meandering correction by the grip roll 100J while being guided by the guide roller 100I. After the meandering correction is performed, the film F is taken up by the take-up reel 100L while being guided by the guide roller 100K. The thickness of the film F to be conveyed is 30 to 50 μm. According to this embodiment, a particularly thin film can be conveyed with low tension.

  The guide roller 1 according to the embodiment of the present invention corresponds to the guide rollers 100E, 100I, and 100K in FIG. As shown in FIG. 2, the guide roller 1 is a metal cylindrical member, and a shaft 3 is inserted through a bearing 2 at the center of the cylindrical member. Further, the guide roller 1 is rotatably supported via a shaft 3 by support bases 4 arranged on both sides. The guide roller 1 has a function of guiding and transporting the film F by contacting the film F in a partial region in the circumferential direction of the outer peripheral surface 1a. A plurality of spiral grooves are formed on the outer peripheral surface 1 a of the guide roller 1. The spiral groove has a function of escaping air that is caught when the film F comes into contact with the outer peripheral surface 1a.

  Specifically, the outer peripheral surface 1a of the guide roller 1 includes a first multi-groove 10 formed in a spiral shape from one end 1b side in the axial direction toward the other end 1c side, and the other end from the one end 1b side in the axial direction. The first multi-groove 10 is formed in a spiral shape in the opposite direction to the first multi-groove 10 toward the 1c side. In the present embodiment, the first multi-groove 10 is a four-groove composed of four grooves 10A, 10B, 10C, and 10D. Moreover, the 1st multi-slot groove | channel 10 has drawn the spiral so that it might rotate toward the circumferential direction D1 in FIG. The second multi-groove 20 is a four-groove composed of four grooves 20A, 20B, 20C, and 20D. Further, the second multi-groove 20 has a spiral shape so as to rotate in the circumferential direction D2 in FIG.

  Here, the number of spiral strips will be described with reference to FIG. For ease of explanation, FIG. 3 will be described taking a screw as an example. First, a single thread is shown in FIG. 3 (a), and a multi-thread (two threads here) is shown in FIG. 3 (b). As shown to Fig.3 (a), the single thread | screw is comprised when one screw thread draws a spiral from the base end BE. In the single thread screw, the pitch P indicating the distance between the screw threads coincides with the lead L that is the amount the screw advances per rotation. On the other hand, as shown in FIG. 3B, the double thread is composed of a first thread that draws a spiral from a predetermined phase at the base end BE and a second thread that draws a spiral from a phase different from the thread. And have. In the double thread, the pitch P and the lead L do not match, and the lead L is twice the pitch P. Thus, a multi-thread is a thread in which the lead L is several times the pitch P. The “multiple groove” in the present embodiment is obtained by replacing the thread of the above-described multiple thread with a groove.

  Next, the multi-grooves 10 and 20 of the guide roller 1 according to the present embodiment will be described in more detail with reference to FIGS. FIG. 4 is a schematic development view in which the outer peripheral surface 1a of the guide roller 1 is developed in a planar shape. In FIG. 4, phase lines every 45 degrees with respect to the outer peripheral surface 1 a of the guide roller 1 are indicated by alternate long and short dash lines. The position where the phase is 0 degrees coincides with the position where 360 degrees. Of the multi-grooves, the grooves 10A to 10D constituting the first multi-groove 10 are indicated by solid lines, and the grooves 20A to 20D constituting the second multi-groove 20 are indicated by dotted lines. Note that the phases set in FIG. 4 are merely for convenience. In FIG. 2, a gap is provided between one end 1b of the guide roller 1 and the ends of the multi-grooves 10 and 20. However, in FIG.

  The first multi-groove 10 is composed of four grooves 10A, 10B, 10C, and 10D that draw a spiral around the circumferential direction D1. These grooves 10A, 10B, 10C, and 10D are out of phase by 90 degrees. Specifically, on one end 1b side of the guide roller 1, the groove 10A starts to draw a spiral from the position of phase 0 degree, the groove 10B starts to draw a spiral from the position of phase 90 degrees, and the groove 10C has a position of phase 180 degrees. The groove 10D starts to draw a spiral from a position of 270 degrees. The second multi-groove 20 is constituted by four grooves 20A, 20B, 20C, and 20D that draw a spiral around the circumferential direction D2. These grooves 20A, 20B, 20C, and 20D are out of phase by 90 degrees. Specifically, on one end 1b side of the guide roller 1, the groove 20A starts to draw a spiral from a position of phase 360 degrees (= 0 degree), the groove 20B starts to draw a spiral from a position of phase 270 degrees, and the groove 20C The spiral starts from the position of 180 degrees and the groove 20D starts to draw the spiral from the position of 90 degrees. The leads L of the first multi-groove 10 and the second multi-groove 20 are four times the pitch P.

  On the outer peripheral surface 1a of the guide roller 1, the intersections of the grooves 10A, 10B, 10C and 10D of the first multi-groove 10 and the grooves 20A, 20B, 20C and 20D of the second multi-groove 20 are formed over the entire surface. CP is formed. In the example shown in FIG. 4, the intersection CP is formed at a phase position having an interval of 45 degrees. Specifically, the phase is 0 degree, 45 degrees, 90 degrees, 135 degrees, 180 degrees, 225 degrees, 270 It is formed at a position of 315 degrees. At the intersection CP where the grooves intersect, the friction with the film F may be reduced. However, such an intersection CP can be distributed over the entire circumference of the guide roller 1. On the outer peripheral surface 1a of the guide roller 1, the smooth surface portion SF that is a smooth surface without a groove has a rhombus shape (the hatched portion in FIG. 4). A plurality of the smooth surface portions SF are formed over substantially the entire region in the circumferential direction and the axial direction of the outer peripheral surface 1a.

  FIG. 5 is an enlarged cross-sectional view of a section of the guide roller 1 cut in the radial direction as seen from the circumferential direction, and shows the grooves 10 </ b> A and 10 </ b> B adjacent to each other in the first multi-groove 10. As shown in FIG. 5, the grooves 10 </ b> A and 10 </ b> B are grooves having a V-shaped cross-sectional shape. The grooves can be formed by various manufacturing methods such as cutting, rolling, and photoetching, but the grooves according to the present embodiment are formed by cutting. When the width in the axial direction of the openings of the grooves 10A and 10B is T1, T1 is set to 0.5 to 1 mm. Further, when the pitch of the first multi-groove 10 is P, P is set to 5 to 10 mm. When the distance between the groove 10A and the groove 10B is T2 as shown in FIG. 5, it is preferable to satisfy the relationship of T1 <T2. That is, it is preferable that the distance between the groove 10A and the groove 10B is larger than the size T1 of the opening of the grooves 10A and 10B. The distance T2 between the groove 10A and the groove 10B satisfies the relationship T2 = (P−T1). Therefore, it is preferable that the relationship of T1 <(P−T1) is satisfied. Specifically, T2 is set to 4.5 to 9 mm. Such a relationship holds for all other grooves not shown.

  Next, operations and effects of the guide roller 1 according to the present embodiment will be described with reference to FIGS. 4, 6, and 7. 6 and 7 are views showing a state in which the outer peripheral surface of the guide roller adopting the single groove is developed in a flat shape.

  First, for comparison, a guide roller when a single groove is employed will be described. 6 shows the configuration of the groove when the groove angle with respect to the circumferential direction is the same as that of the guide roller 1 shown in FIG. 4, that is, when the lead L is the same. On the outer peripheral surface of the guide roller shown in FIG. 6, a first single groove 110 (shown by a solid line) that draws a spiral around the circumferential direction D1 and a second single groove 120 that draws a spiral around the circumferential direction D2 are formed. ing. The first single groove 110 and the second single groove 120 start to draw a spiral from a position of 180 degrees in phase. In such a guide roller, the intersection CP where the grooves intersect with each other is formed only at the positions of the phase of 0 degrees and 180 degrees, and is not formed at the positions related to other phases. In such a case, for example, when the film F is in contact with the area indicated by TA2 (area with dots) on the guide roller, since the intersection CP does not exist, the frictional force increases. On the other hand, when it is in contact with the region indicated by TA1 in the vicinity of the phase of 180 degrees, the intersection CP exists, so that the frictional force is reduced at the intersection CP. As described above, in the guide roller in the case of adopting the single groove, since the intersection CP is formed only in a specific phase, there is a possibility that the frictional force varies depending on the position where the film F contacts the outer peripheral surface. is there.

  7 shows the structure of the groove when the grooves are formed more densely than in FIG. 6 and the pitch P is the same as that of the guide roller 1 shown in FIG. As shown in FIG. 7, even when the single grooves 210 and 220 are formed densely, the intersection CP is formed only at the positions of the phase 0 degree and 180 degrees. That is, even in the example shown in FIG. 7, since the intersection CP is formed only in a specific phase, there is a possibility that the frictional force varies depending on the position where the film F contacts the outer peripheral surface. Furthermore, as shown in FIG. 7, when the single grooves 210 and 220 are too dense, the angle of the single grooves 210 and 220 with respect to the circumferential direction becomes small, and the spiral groove becomes as close to an annular groove as possible. In such a case, the film F will be conveyed along the edge of the opening part of a groove | channel, and may become easy to be damaged. On the other hand, when the groove angle with respect to the circumferential direction is increased in order to reduce the damage to the film, the number of grooves with respect to the outer peripheral surface of the guide roller becomes too small as shown in FIG. There is a possibility that you cannot escape.

  On the other hand, in the guide roller 1 according to the present embodiment, the outer peripheral surface 1a has a first multi-groove 10 formed in a spiral shape and a second spiral formed in the opposite direction to the first multi-groove groove 10. And a multi-groove 20. When the multi-grooves 10 and 20 are employed, as shown in FIG. 4, the intersection points CP where the grooves intersect with each other are formed evenly in the circumferential direction over the entire circumference of the outer circumferential surface 1 a. Specifically, even when the film F is in contact with the area indicated by TA2 in the guide roller or when it is in contact with the area indicated by TA1 in the vicinity of the phase of 180 degrees, The number of existing intersections CP is almost the same. That is, there is almost no difference in frictional force. Therefore, the guide roller 1 according to the present embodiment has a constant frictional force regardless of the region in contact with the film F, as compared with the case where a single groove is employed. Furthermore, the multi-grooves 10 and 20 make it possible to form the grooves densely without reducing the angle of the grooves with respect to the circumferential direction. As a result, it is possible to sufficiently release the entrained air while preventing the film F from being damaged. In addition, since the first multi-groove 10 and the second multi-groove 20 are formed on the outer peripheral surface 1a of the guide roller 1 in the opposite directions, the air entrained between the film F and the guide roller 1 is formed. Can escape right and left evenly. Therefore, it is possible to prevent the film F from being biased toward any one end side. By the above, according to the guide roller 1 which concerns on this embodiment, the performance of film conveyance can be improved.

  Further, in the guide roller according to the present embodiment, the grooves 10A, 10B, 10C, 10D constituting the first multi-groove 10 and the grooves 20A, 20B, 20C, 20D constituting the second multi-groove 20 are in the axial direction. T1 <(P−T1) is satisfied, where T1 is the size of the groove opening and P1 is the groove pitch. When the distance between adjacent grooves placed in the same multi-slot is T2, the relationship T1 <T2 is satisfied. By satisfying this relationship, the width of the portion where the smooth surface portion SF having a smooth surface is formed becomes larger than the size of the opening portion of the groove. That is, the portion where the film F and the smooth surface are in contact can be enlarged. This makes it possible to ensure the frictional force against the film F while making it easy to escape the air that has been involved.

  The present invention is not limited to the above-described embodiment.

  For example, in the above-described embodiment, the four-grooves have been described as an example of the multi-grooves, but may be two-grooves, three-grooves, or more than four. Moreover, the number of stripes may be different between the first multi-groove and the second multi-groove. Moreover, the pitch may differ between the first multi-groove and the second multi-groove. Moreover, it is not necessary that both the first multi-groove and the second multi-groove are formed over the entire axial direction, and at least in the region in contact with the film F, the first multi-groove and the second multi-groove are It only has to overlap.

  DESCRIPTION OF SYMBOLS 1 ... Guide roller, 1a ... Outer peripheral surface, 1b ... One end, 1c ... Other end, 10 ... 1st multi-groove, 10A, 10B, 10C, 10D ... Groove (groove which comprises 1st multi-groove), 20 ... Second multi-groove, 20A, 20B, 20C, 20D... Groove (groove constituting the second multi-groove).

Claims (2)

A guide roller that conveys the film by contacting the film in a partial region in the circumferential direction of the outer peripheral surface,
The outer peripheral surface is
A first multi-groove formed in a spiral shape from one end side to the other end side in the axial direction;
A guide roller, comprising: a second multi-groove formed in a spiral shape in the opposite direction to the first multi-groove from one end side to the other end side in the axial direction. The grooves constituting the first multi-groove or the second multi-groove are:
2. The guide roller according to claim 1, wherein when the width of the opening of the groove in the axial direction is T1 and the pitch of the groove is P1, the relationship of T1 <(P−T1) is satisfied.

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