JP2007191276A - Film winding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a film winding device capable of winding a film without position-deviating the film wound on a film roll and without forming wrinkles on the film roll. <P>SOLUTION: A touch roller 20 of a film winding device 10 for winding a belt-like film 30 having constant width on a winding core 11 to form the film roll 31 has tapered surfaces 21 sequentially tapering from a center of a touch roller width 29 toward both ends 22, 23 of the touch roller, and the maximum width 36 of a contact surface 34 on the film 30 contacted with the touch roller 20 is in a range of 5% to 95% of the width 33 of the film, preferably in a range of 30% to 60%. Both ends 22, 23 of the touch roller have round chamfered portions 24, 25 continuing to the tapered surfaces 21. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a film winding device for winding a film having a single layer structure made of paper, plastic, etc., and a multilayer structure film in which a polishing layer, a magnetic layer, etc. are laminated on the surface of a base film made of cloth or plastic. It is about.

  In general, films having a single layer structure and a multilayer structure are wound using a film winding device as shown in FIGS. 5A, 6A and 7A.

  The film winding device 50 shown in FIG. 5A rotates the columnar or cylindrical core 11 with respect to the winding axis 12 and winds the film 30 so that the direction of the width 33 of the film 30 is parallel to the winding axis 12. The film roll 31 made of the film 30 is formed by winding it around the core 11. The film 30 travels in the direction of arrow T through a guide roller (not shown) disposed on the upstream side of the film roll 31 by the rotation of the winding core 11 and is wound on the outer peripheral surface 32 of the film roll. In this film winding device 50, as shown in FIG. 5B, the film 30 contacts the outer peripheral surface 32 of the film roll along a contact line indicated by reference numeral 37. A tension is applied to the film 30 wound on the outer peripheral surface 32 of the film roll in a direction opposite to the traveling direction T of the film 30 over the contact line 37 by the guide roller.

  In such a conventional film winding device 50, the air flowing following the outer peripheral surface 32 of the rotating film roll 31 is wound between the outer peripheral surface 32 of the film roll and the film 30, and acts on the contact line 37. The above-described tension is not uniform, and the film 30 wound around the film roll 31 is displaced. Further, the film 30 is wound around the film roll 31 in a state where the film 30 is locally displaced due to the local positional deviation of the film 30 on the outer peripheral surface 32 of the film roll due to the entrainment of air, and the film roll 31 is wrinkled. The problem arises that is formed.

  In order to prevent such positional displacement due to air entrainment, a columnar touch roller 61 (FIG. 6B) having a width longer than the width of the film 30 (reference numeral 33) is used as in the film winding device 60 shown in FIG. 6A. The film 30 wound up by the film roll 31 is pressed on the outer peripheral surface 32 of the film roll (for example, refer patent documents 1-7).

  In the conventional film winding device 60 shown in FIG. 6A, the film 30 has the entire width (reference numerals 33 and 36) of the film 30 in contact with the touch roll 61 (see FIG. 6C on the film 30 with which the touch roll 61 contacts. Next, the entire width of the film 30 is in contact with the outer peripheral surface 32 of the film roll 31 (FIG. 6C shows a contact line where the film 30 is in contact with the outer peripheral surface 32 of the film roll 31). The entire width of the film 30 is pressed onto the outer peripheral surface 32 of the film roll via the touch roll 61 on the contact line 37 and wound on the film roll 31.

  That is, in this film winding device 60, since the entire width of the film 30 is pressed onto the outer peripheral surface 32 of the film roll over the contact line 37 via the touch roller 61, air is not involved as described above. The film 30 can be wound on a film roll 31.

  However, since the film 30 is wound around the columnar or cylindrical core 11 as described above, the curvature radius is different between the surface side of the film 30 and the back surface side (the side of the winding shaft 12), and the film roll A portion of the film wound on the side of the winding shaft 12 is compressed in the circumferential direction of the film roll 31 (that is, the direction in which the film roll 31 rotates), and spots are locally generated in the diameter of the film roll 31. . In particular, in a film having a multilayer structure, local deviation occurs between the layer on the surface side of the film wound around the film roll 31 and the layer on the winding shaft 12 side, and the diameter of the film roll 31 is uneven. It occurs locally.

  In general, the film 30 is slit by a film take-up device after slitting to a certain width using a slitter having a roller having a plurality of blades attached in parallel on the outer periphery. For example, the side portion of the film 30 may be deformed at the time of slitting, and the vicinity of the side portion of the slit film may be thick. Furthermore, foreign matters such as floating dust may be wound around the film roll 31 while electrostatically adhering to the film 30, and spots may be locally generated on the diameter of the film roll 31.

  Thus, when there is unevenness in the diameter of the film roll 31 that is winding the film 30, the film 30 that is pressed and wound on the outer peripheral surface 32 of the film roll is taken up at a place where the diameter of the film roll 31 is large. The extremely high tension acts locally in the direction opposite to the traveling direction T of the film 30, and the film 30 wound up on the film roll 31 is displaced. And in the conventional film winding apparatus 60 as shown to FIG. 6A, since the whole width of the film 30 is pressed on the outer peripheral surface 32 of the film roll via the touch roll 61 over the contact line 37, the film 30 Immediately after the misalignment, the part of the misaligned film is pressed onto the outer peripheral surface 32 of the film roll by the touch roll 61, thereby causing a problem that wrinkles are formed on the outer peripheral surface 32 of the film roll. Arise.

  7A uses a touch roller 71 (FIG. 7B) that tapers sequentially from the center of the width of the touch roller 71 toward both ends thereof (for example, Patent Document 8). reference).

  In the film winding device 70, the entire width of the film 30 (indicated by reference numerals 33 and 36) is in contact with the touch roller 71 as shown in FIG. 7B.

  As shown in FIG. 7C, the film 30 contacts so as to taper sequentially from the center of the width (reference numerals 33 and 36) of the film 30 toward both ends thereof (contact surface indicated by reference numeral 34). The center of the film roll is pressed onto the outer peripheral surface 32 of the film roll through the center of the width of the touch roller 71, and the outer periphery of the film roll extends from the center of the width of the film 30 toward both sides along the contact line 37. Sequential contact is made on the surface 32.

  And in this film winding apparatus 70, the tension | tensile_strength which faced the direction opposite to the running direction T of the film 30 by the touch roller 61 (The whole width | variety of the film 30 is contacting as mentioned above) contact of the film 30. Since it acts over the wire | line 37, the film 30 can be wound around the film roll 31, without entraining air as mentioned above.

  However, in such a conventional film winding device 70, since the entire width of the film 30 is in contact with the touch roller 71, if there is a local spot in the diameter of the film roll 31 as described above, this diameter There is a problem in that an extremely large tension acts in a direction opposite to the traveling direction T of the film 30 at a position where the film 30 is large, and the film 30 wound around the film roll 31 is displaced. Further, the film 30 is wound around the film roll 31 in a state where the film 30 is locally displaced due to the local positional deviation of the film, and a wrinkle is formed in the film roll 31.

That is, since the entire width of the film 30 is brought into contact with the touch roller 61 so as not to entrain air, the tension acts in the direction toward the touch roller 61 over the contact line 37 of the film 30. When a local positional deviation of the film 30 occurs on the outer peripheral surface 32 of the film roller 31, both sides of the film 30 cannot follow both sides of the film already wound on the film roll 31, The positional deviation cannot be corrected, and the film 30 is wound on the outer peripheral surface 32 of the film roll while being displaced on the outer peripheral surface 32 of the film roll, so that wrinkles are formed on the film roll 31.
Japanese Utility Model Publication No. 6-25249 JP-A-6-329308 JP-A-9-194086 Japanese Patent Laid-Open No. 10-67449 JP 2000-128406 A JP 2001-63877 A JP 2004-67368 A JP-A-5-310346

  In the conventional technology, as described above, when a film is wound without using a touch roll, air is trapped between the film roll and the film, and thereby the film wound on the film roll is misaligned. However, there arises a problem that the film roll is wrinkled.

  On the other hand, when using a touch roll to bring the entire width of the film into contact with the touch roll and then winding the film onto the film roll, the film has a tension across the contact line where the film contacts the film roll. Since there is a local unevenness in the film roll diameter, this tension becomes extremely large where the film roll diameter is large. The problem is that the film to be formed is displaced and wrinkles are formed on the film roll.

  The present invention has been made in view of the above problems, and therefore, the film winding that can wind the film without causing the film roll to be misaligned and without forming wrinkles on the film roll. The object is to provide an apparatus.

  The film winding device of the present invention that achieves the above object is for winding a strip-shaped film having a certain width, and is a cylindrical or cylindrical core that can rotate about an axis (hereinafter, this core). Means for rotating the core with respect to the winding axis to form a film roll made of the film, and an axis parallel to the winding axis. It is composed of a rotatable touch roller (hereinafter, the axis of the touch roller is referred to as a “rotary axis”).

  The leading edge portion of the film is attached to the winding core such that the width direction of the film is parallel to the winding axis.

  The touch roller has a tapered surface that gradually tapers from the center of the width of the touch roller toward both ends of the touch roller, and the shape of the touch roll passes through the center of the width of the touch roller and is perpendicular to the rotation axis. Symmetric with respect to any plane. (Here, the width of the touch roller refers to the width of the touch roller in the direction of the rotation axis.)

  And the center of the width of the touch roller so that the center of the width of the film wound around the outer peripheral surface of the film roll is pressed against the center of the width of the outer peripheral surface of the film roll through the center of the width of the touch roller, Located in the middle of the film width.

  In order to achieve the above object, in the present invention, the maximum width of the contact surface on the film where the touch roller contacts the film is in the range of 5% or more and 95% or less of the width of the film, preferably 30% or more. In the range of 60% or less. (Here, the width of the contact surface refers to the width of the contact surface in the direction of the rotation axis.)

  Thus, since the shape of the touch roll has symmetry, and the center of the width of the touch roller is located at the center of the width of the film, the center of the width of the film wound around the outer surface of the film roll is the touch roller. The film that is pressed against the center of the outer peripheral surface of the film roll through the center of the width of the film and wound on the film roller is formed on the outer peripheral surface of the film roller from the center of the film width toward both sides. Contact sequentially symmetrically with respect to the center of the width.

  Moreover, since the width | variety of the touch roller of the film winding apparatus of this invention is shorter than the width | variety of a film, it exists in the state which is easy to wind air in the both sides of the film wound up by a film roll. That is, there is a local spot on the diameter of the film roll, and an extremely large tension directed in the direction opposite to the running direction of the film acts on the film where the diameter of the film roll is large. Even if the film to be misaligned, both sides of the film wound up on the film roll (the part that is in a state where air can easily be wound) follow the both sides of the film already wound up on the film roll. The positional deviation is corrected and the film is wound on the outer peripheral surface of the film roll without forming wrinkles on the film roll.

  That is, since air is easily caught in both sides of the film, both sides of the film on the outer peripheral surface of the film roll are easy to move in the width direction of the film, and even if the film is misaligned. The both ends of the film wound around the film roll follow the both ends of the film already wound around the film roll, and the positional deviation of the film is corrected.

  As described above, the tapered surface of the touch roller tapers sequentially from the center of the width of the touch roller toward both ends of the touch roller, and the both ends of the touch roller are R chamfered portions that are continuous with the tapered surface. Can have.

  The tapered surface of the touch roller may be a spherical or elliptical curved surface obtained by rotating a circular or elliptical curve around the rotation axis. The both end portions of the touch roller may be included in the curved surface, or may have an R chamfered portion that is continuous with the curved surface (that is, a tapered surface).

  The tapered surface of the touch roller is a conical surface obtained by rotating a rhombus whose one diagonal line is on the rotation axis and the other diagonal line passes through the center of the width of the touch roll around the rotation axis. Sometimes, both ends of the touch roller have R chamfered portions that are continuous with the tapered surface.

  As described above, the present invention is a film winding device for winding a strip-shaped film having a certain width. For example, a plurality of strip-shaped films fed from one original film are disposed. The film winding of the present invention is applied to a film winding device with a slitter, which is slit into strip-like films (the width of each film may be the same or different) and winds these films simultaneously. Multiple capture devices can be incorporated.

  Since this invention is comprised as mentioned above, there exists an effect that a film can be wound up, without making a film roll wound around a film roll, and forming a wrinkle in a film roll.

  FIG. 1A shows a film winding apparatus 10 of the present invention. As shown in the figure, the film winding apparatus 10 of the present invention is for winding a strip-shaped film 30 having a certain width (indicated by reference numeral 33 in FIGS. 1B and 1C).

  The film winding device 10 of the present invention is composed of a film 30 by winding a cylindrical or cylindrical core 11 and a film 30 that are rotatable about an axis (“winding axis” indicated by reference numeral 12) around the core 11. Means (not shown) for rotating the winding core 11 with respect to the winding axis 12 to form the film roll 31, and rotatable about an axis parallel to the winding axis 12 (“rotation axis” indicated by reference numeral 14). The touch roller 20 is configured.

  The means for rotating the winding core 11 with respect to the winding shaft 12 is a known means for driving the motor to rotate the winding core 11 with respect to the winding shaft 12.

  The leading edge portion (not shown) of the film 30 is wound so that the width direction of the film 30 (the width direction of the film 30 and the film roll 31 indicated by reference numeral 33 in FIG. 1C) is parallel to the winding shaft 12. Attached to the core 11. The front edge portion of the film 30 is fixed to the outer peripheral surface of the core 11 using an adhesive.

  As shown in FIG. 1B, the touch roller 20 is attached to a shaft 13 having an axis that coincides with the rotation shaft 14. This shaft 13 can be rotated about the rotating shaft 14 by known means (not shown) that drives the motor to rotate the core 11 about the winding shaft 12.

  The touch roller 20 has a tapered surface 21 that tapers sequentially from the center of the width 29 of the touch roller 20 toward both end portions 22 and 23 of the touch roller 20. The shape of the touch roll 20 is symmetric with respect to a plane that passes through the center of the width 29 of the touch roller 20 and is perpendicular to the rotation axis 14. (Here, the width 29 of the touch roller 20 refers to the width of the touch roller 20 in the direction of the rotary shaft 14).

  And, the center of the width 33 of the film 30 wound around the outer peripheral surface 32 of the film roll 31 is pressed against the center of the width of the outer peripheral surface 32 of the film roll 31 through the center of the width 29 of the touch roller 20. The center of the width 29 of the touch roller 20 is located at the center of the width 33 of the film 30.

  As shown in FIG. 1B, in the film winding device 10 of the present invention, the touch roller 20 contacts the film 30. The contact surface 34 on the film 30 is shown in FIG. 1C.

  In the present invention, the maximum width 36 of the width of the contact surface 34 (the width of the contact surface 34 means the width of the contact surface 34 in the direction of the rotating shaft 14) is 5% or more of the film width 33, 95. % Or less, preferably 30% or more and 60% or less. (Here, FIG. 4A shows a state where the maximum width 36 of the width of the contact surface 34 with respect to the width 33 of the film 30 is less than 100%, and FIG. 4B shows a state where the maximum width 36 is 100%. .)

  As shown in FIG. 1C, the film 30 travels in the direction of the arrow T, and the center of the width 33 of the film 30 passes through the center of the width 29 of the touch roller 20 and the center of the width of the outer peripheral surface 32 of the film roll 31. To the outer peripheral surface 32 of the film roll 31 sequentially from the center of the width 33 of the film 30 toward both sides of the film 33 (in FIG. 1C, the contact line of the film 30 with respect to the outer peripheral surface 32 of the film roll 31 is denoted by 37) and is wound on the outer peripheral surface 32 of the film roll 31.

  As described above, the tapered surface 21 of the touch roller 20 tapers sequentially from the center of the width 29 of the touch roller 20 toward both ends 22 and 23 of the touch roller 20. 24 may have R chamfered portions 24 and 25 continuous with the tapered surface 21 (the boundary between the tapered surface 21 and the R chamfered portions 24 and 25 is indicated by a broken line in FIG. 1B).

  The tapered surface 21 of the touch roller 20 has an elliptical curve in which one of the long axis 26 a and the short axis 26 b coincides with the rotation axis 14 and the other axis passes through the center of the width of the touch roll 20. An elliptical curved surface (FIGS. 2A and 2B) obtained by rotating 26 around the rotation axis 14, or the diameter 27a coincides with the rotation axis 14 and the center (intersection of the diameter 27a and the diameter 27b) is touched It may be a spherical curved surface (FIG. 2C) obtained by rotating a circular curve 27 located at the center of the width of the roll 20 around the rotation axis 14.

  The both end portions 22 and 23 of the touch roller 20 are included in this curved surface (that is, the entire shape of the touch roll 20 including both end portions 22 and 23 (excluding the portion fixed to the shaft 13) 26 and 27, and may have R chamfered portions 24 and 25 that are continuous with the curved surfaces 26 and 27 (that is, the tapered surface 21). (The boundary between the tapered surface 21 and the R chamfered portions 24, 25 is shown by broken lines in the direction perpendicular to the rotation axis 14 in FIGS. 2A, 2B, and 2C).

  Further, the tapered surface 21 of the touch roller 20 has a rhombus 28 in which one diagonal line 28 a is on the rotation shaft 14 and the other diagonal line 28 b passes through the center of the width of the touch roll 20 around the rotation shaft 14. In this case, it is desirable that both end portions 22 and 23 of the touch roller 20 have R chamfered portions 24 and 25 continuous with the tapered surface 21 (the tapered surface 21 and the R chamfered portion). The boundary between 24 and 25 is shown in FIG. 2D by a broken line in a direction perpendicular to the rotation axis 14).

<Embodiment> In an embodiment of the present invention, a plurality of films having a predetermined width are slit into a plurality of films having a predetermined width, and these films are wound up by a plurality of the film winding devices of the present invention. It forms a film roll of a book.

  An example of an embodiment of the present invention is shown in FIGS. 3A and 3B. In the illustrated example, the film 41 ′ sent out from the original film 41 in the direction of the arrow T has four predetermined widths (the widths may be the same or different). The film 30 ′, 30 ″ is slit, and these films are wound up by the four film winding devices 10a, 10b, 10c, 10d of the present invention, and the four film rolls 31a, 31b, 31c, 31d are To form. Here, the number of slits of the film and the number of film winding devices can be appropriately selected as necessary. For example, when the number of slits is two, two film winding devices are sufficient.

  The film 41 ′ having a certain width 49 sent out from the original fabric 41 is sent to the slitter 42 through the guide rollers 43 and 44, and a plurality of (four in the illustrated example) predetermined widths 33 a and 33 b are sent by the slitter. , 33c and 33d are slit into the films 30 ′ and 30 ″. The slitter 42 is a known slitter having a roller having a blade attached to the outer periphery and a roller having an outer peripheral surface for receiving the blade.

  The four films 30 ′, 30 ″ slit into predetermined widths 33 a, 33 b, 33 c, 33 d are respectively guided through the guide rollers 45, 46, 47, 48 through the film winding devices 10 a, 10 b, 10 c, Sent to each of 10d.

  Each of the film winding devices 10a, 10b, 10c, and 10d is similar to the film winding device 10 shown in FIG. 1A. The cylindrical or cylindrical winding cores 11a and 11b and the film 30 ′ are rotatable about the winding shafts 12a and 12b. , 30 ″ are wound around the cores 11a and 11b to form cylindrical film rolls 31a, 31b, 31c and 31d made of films, and the cores 11a, 11b, 11c and 11d are wound around the winding shaft 12a. , 12b, means for rotating (not shown), and touch rollers 20a, 20b, 20c, 20d attached to shafts 13a, 13b having rotating shafts 14a, 14b parallel to the winding shafts 12a, 12b. .

  In the illustrated example, in the film winding apparatuses 10a and 10b, the two films 30 'are wound around the winding cores 11a and 11b that are rotatable about the same winding shaft 12a. It may be individually wound around a winding core having a winding axis. Similarly, in the film winding apparatuses 10c and 10d, the two films 30 ″ are wound around the winding cores 11c and 11d that are rotatable about the same winding shaft 12b, respectively. It may be individually wound around a winding core having a winding axis.

<Comparative Test> Using a film winding apparatus as shown in FIG. 1, the film is wound to form a film roll, and the quality of the film roll (wrinkle generation after winding and positional displacement due to air entrainment) Occurrence). As the film, a film having a multilayer structure in which a film having a thickness of 38 μm and a film having a thickness of 38 μm were pressure-bonded via a binder was used.

Example 1 As a touch roller, as shown in FIG. 2A, the taper surface has a short axis length of 13 to 10 passing through the center of the width of the touch roller with respect to the length of the long axis on the rotation axis. A rubber roll (surface of the surface) is formed by rotating the elliptic curve around the rotation axis of the touch roller. Hardness (Japan Rubber Association Standard, SRISO 101): Asker C hardness 80, average surface roughness (Ra): 1 μm) was used. The ratio of the width of the contact surface of the touch roller to the width of the film was 5%.

<Example 2> The conditions were the same as in Example 1 except that the ratio of the maximum width of the contact surface of the touch roller to the width of the film was 30%.

Example 3 The conditions were the same as in Example 1 except that the ratio of the maximum width of the contact surface of the touch roller to the film width was 60%.

Example 4 The conditions were the same as in Example 1 except that the ratio of the maximum width of the contact surface of the touch roller to the film width was 95%.

<Comparative example 1> As shown to FIG. 5A, the film was wound up without using a touch roller.

<Comparative Example 2> The conditions were the same as in Example 1 except that the ratio of the maximum width of the contact surface of the touch roller to the width of the film was 3%.

<Comparative Example 3> The conditions were the same as in Example 1 except that the ratio of the maximum width of the contact surface of the touch roller to the width of the film was 98%.

<Comparative example 4> As shown to FIG. 4B, it was the same conditions as the said Example 1 except having made the ratio of the maximum width of the width of the contact surface of the touch roller with respect to the width of a film into 100%.

<Comparative Example 5> As a touch roller, as shown in FIGS. 6A and 6B, a cylindrical rubber roll (surface hardness (Japan Rubber Association Standard, SRISO101): Asker C hardness 80) that is uniformly long in the direction of the rotation axis. The average surface roughness (Ra): 1 μm) was used, and the conditions were the same as in Example 1 except that the ratio of the maximum width of the contact surface of the touch roller to the width of the film was 100%. .

<Comparative Test Results> The comparative test results are shown in Table 1 below. As shown in Table 1, when the maximum width of the contact surface with respect to the width of the film is less than 5%, the film is displaced due to air entrainment, and when it exceeds 95%, the film roll is caused by the displacement of the film. Wrinkles are formed.

1 is a side view of the film winding device of the present invention, FIG. 1B is a cross-sectional view taken along line AA of FIG. 1A, and FIG. 1C is a contact surface of the film with respect to the touch roller in the device of FIG. The contact line of the film with respect to a roll is shown. 2A to 2D are cross-sectional views taken along line AA in FIG. 1, and are cross-sectional views of the touch roller according to the present invention, respectively. FIG. 3 shows a film winder with a slitter according to the present invention (embodiment of the present invention), FIG. 3A is a side view thereof, and FIG. 3B is a front view thereof. FIG. 4A is a cross-sectional view illustrating a contact state (Examples 1 to 4, Comparative Example 2 and Comparative Example 3) between the touch roller and the film according to the present invention, and FIG. 4B is according to the present invention. It is sectional drawing explaining the contact state (comparative example 4) between a touch roller and a film. FIG. 5A is a side view of a conventional film winding device (without touch roller) (Comparative Example 1), and FIG. 5B shows a contact line of the film with respect to the film roll in the device of FIG. 5A. 6A is a side view of a film winding apparatus of the prior art (Comparative Example 5), FIG. 6B is a cross-sectional view taken along line BB of FIG. 6A, and FIG. 6C is a drawing of a film with respect to a touch roller in the apparatus of FIG. A contact surface and the contact line of the film with respect to a film roll are shown. 7A is a side view of a conventional film winding device, FIG. 7B is a cross-sectional view taken along line CC of FIG. 7A, and FIG. 7C is a contact surface of the film with respect to the touch roller in the device of FIG. The contact line of the film with respect to a roll is shown.

Explanation of symbols

10, 10a, 10b, 10c, 10d ... Film winding device 11, 11a, 11b, 11c, 11d ... core 12 ... winding shaft 13, 13a, 13b ... shaft 14 of the present invention ..Rotating shaft 20, 20a, 20b, 20c, 20d ... touch roller 21 ... tapered portion 22,23 ... end portion 24, 25 ... R chamfered portion 26 ... spheroid 26a .... Long axis 26b ... Short axis 27 ... Spheres 27a, 27b ... Diameter 28 ... Rotating bodies 28a, 28b ... Diagonal line 29 ... Touch roller width 30 ... Film 30 ' , 30 "... Films 31, 31a, 31b, 31c, 31d after slitting ... Film roll 32 ... Peripheral surfaces 33, 33a, 33b, 33c, 33d ... Film and fill of film roll Roll width 34 ... Contact surface 35 of the film in contact with the touch roller ... Contact surface width 36 ... Contact surface width maximum width 37 ... Contact line 40 ... Slitting film winding Apparatus (Embodiment of the present invention)
41 ... Original film 41 '... Film 42 before slitting ... Slitter 43, 44, 45, 46, 47, 48 ... Guide roller 49 ... Original film width 50, 60, 70: Conventional film winding device 61, 71: Conventional touch roller T: Travel direction of film

Claims (5)

An apparatus for winding a band-shaped film having a certain width,
A cylindrical or cylindrical core having a winding axis and rotatable about the winding axis,
The leading edge portion of the film is attached to the core so that the width direction of the film is parallel to the winding axis;
However,
Means for rotating the winding core with respect to the winding axis to wind the film around the winding core to form a film roll made of the film, and a rotation axis parallel to the winding axis; A touch roller rotatable about the rotation axis,
The touch roller has a tapered surface that tapers sequentially from the center of the width of the touch roller toward both ends of the touch roller;
The shape of the touch roll is symmetric with respect to a plane passing through the center of the width of the touch roller and perpendicular to the rotation axis;
The center of the width of the touch roller so that the center of the width of the film wound around the outer peripheral surface of the film roll is pressed against the center of the width of the outer peripheral surface of the film roll through the center of the width of the touch roller. Is located in the middle of the width of the film,
However, the touch roller,
Consisting of
The maximum width in the direction of the rotation axis of the contact surface on the film with which the touch roller contacts is in the range of 5% or more and 95% or less of the width of the film,
But the device. The apparatus of claim 1, comprising:
The maximum width of the contact surface in the direction of the rotation axis is in the range of 30% or more and 60% or less of the width of the film.
But the device. The apparatus of claim 1, comprising:
The tapered surface is a spherical or elliptical curved surface obtained by rotating a circular or elliptical curve around the rotation axis.
But the device. The apparatus of claim 1, comprising:
Both ends of the touch roller have R chamfered portions that are continuous with the tapered surface,
But the device. The apparatus of claim 1, comprising:
The tapered surface is a conical surface obtained by rotating a diamond whose one diagonal is on the rotation axis and the other diagonal passes through the center of the width of the touch roll around the rotation axis,
Both ends of the touch roller have R chamfered portions that are continuous with the tapered surface,
But the device.

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