JP5201262B2 - Reel for adhesive tape - Google Patents

Abstract

The disclosed reel (1) is provided with a winding core (2) and a pair of side plates (3). An adhesive tape (T) is wound around the winding core (2). The pair of side plates (3) are affixed to the ends of the winding core (2). Radial ribs (6) are formed on the inside surface (3a) of each side plate (3). The ribs (6) on one side plate (3) are offset from the ribs (6) on the other side plate (3) by an angle ?. The tape (T) wound around the winding core (2) contacts the ribs (6). The ribs (6) on both sides, offset from each other, can cause the tape (T) to form an S-shaped curve. The separation (W1) between the pair of side plates (3) can be less than the separation (W2) between conventional pairs of side plates (3). The tape (T) may be an anisotropic conductive tape. Anisotropic conductive tape comprises a substrate and an anisotropic conductive film formed on the substrate. The offset of angle ? between the ribs (6) on both sides inhibits separation (blocking) of the anisotropic conductive film from the substrate.

Description

  The present invention relates to an adhesive tape reel.

  An anisotropic conductive film (ACF) is used as a connection material for electrically connecting connected members having a large number of electrodes. Anisotropic conductive films maintain the electrical connection between opposing electrodes when connecting semiconductor elements such as ICs and LSIs and connected members such as packages to substrates such as printed circuit boards, LCD glass substrates, and flexible printed substrates. It is used as a connection material that performs electrical connection and mechanical fixation so as to maintain insulation between adjacent electrodes.

  The anisotropic conductive film includes, for example, an adhesive component containing a thermosetting resin and conductive particles blended as necessary, and is formed in a film shape on a base material such as a polyethylene terephthalate film (PET). . An anisotropic conductive tape is produced by cutting the raw material of such an anisotropic conductive film with a width suitable for the application, and is stored in a wound state on a reel (see, for example, Patent Document 1).

JP 2003-34468 A JP 2009-149396 A

  Incidentally, a reel on which an adhesive tape such as an anisotropic conductive tape is wound generally includes a winding core and a pair of side plates for preventing collapse. Conventionally, in the process of winding an adhesive tape around a reel, if the adhesive layer or base material of the tape comes into contact with the side plate of the reel or the adhesive layer oozes out during storage, the adhesive layer peels off from the base material (blocking). Phenomenon) may occur.

  On the other hand, in the reel described in Patent Document 2, a plurality of ribs extending from the center side to the peripheral side of the side plate are provided on the inner side surface of the side plate. Thereby, the direct contact between the side portion of the adhesive tape and the side plate is avoided, and the blocking phenomenon is prevented. Therefore, in such a reel, further ingenuity in construction is desired in order to bring about an advantage that the blocking phenomenon can be prevented.

  The present invention has been made to solve the above problems, and an object thereof is to provide an adhesive tape reel capable of preventing a blocking phenomenon.

  In order to solve the above problems, an adhesive tape reel according to the present invention includes a cylindrical winding core around which an adhesive tape can be wound, and a pair of side plates provided opposite to each other at both ends of the winding core. A plurality of ribs extending from the center side to the peripheral side of the side plate are formed on the inner side surface of the side plate, and the pair of side plates has a rib position on one side plate and a rib position on the other side plate. It is characterized by being fixed to the core in a shifted state.

  In this adhesive tape reel, a plurality of ribs extending from the center side to the peripheral side of the side plates are formed on the inner side surfaces of the pair of side plates. Therefore, the adhesive tape wound around the winding core makes point contact with the rib, and direct contact between the side portion of the tape and the inner side surface of the side plate can be avoided. In this adhesive tape reel, the position of the rib on one side plate and the position of the rib on the other side plate are shifted. For this reason, it is suppressed that an excessive force is applied to the adhesive tape sandwiched between the ribs, and it is difficult to cause a blocking phenomenon.

  On the other hand, in this adhesive tape reel, the position of the ribs on one side plate is shifted from the position of the ribs on the other side plate, so that the position between the side plates is smaller than when the positions of the ribs match. Can be reduced. Thereby, since the adhesive tape is accurately guided by the side plate during the winding operation, the working efficiency can be improved. Moreover, even if force is applied to the adhesive tape during storage or transportation, damage to the adhesive tape can be reduced.

  Moreover, it is preferable that the shift | offset | difference angle of the rib in one side plate and the rib in the other side plate is 5 degrees-15 degrees. By selecting such a deviation angle, it is possible to suitably suppress an excessive force from being applied to the adhesive tape sandwiched between the ribs, and it is possible to more effectively prevent the occurrence of the blocking phenomenon.

  Moreover, it is preferable that the length of the adhesive tape wound around a winding core is 300 m or more. In a long tape having a length of 300 m or more, undulation is likely to occur on the side surface of the wound body during winding, and direct contact between the side portion of the tape and the inner side surface of the side plate is likely to occur. Therefore, as described above, the position of the ribs on one side plate is shifted from the position of the ribs on the other side plate, thereby effectively preventing the occurrence of a blocking phenomenon even for a long tape. it can. Further, in the case of a long tape, since the number of windings on the core increases, the effect of reducing the manufacturing cost by improving the efficiency of the winding work can be obtained remarkably.

  Moreover, it is preferable that the width | variety of the adhesive tape wound around a core is 0.5 mm-3.0 mm. With a narrow tape having a width of 0.5 mm to 3.0 mm, the tape is likely to enter between the side plate and the wound body when winding around the core. Therefore, as described above, the work efficiency is improved by accurately guiding the adhesive tape by the side plate during the winding operation.

  Moreover, it is preferable that an adhesive tape is a conductive tape which connects the electrode of a photovoltaic cell, and a tab wire. In this case, the blocking phenomenon can be prevented in the conductive adhesive tape.

  The reel for adhesive tape according to the present invention can prevent the blocking phenomenon of the adhesive tape wound around the core.

It is a front view which shows one Embodiment of the reel for adhesive tapes which concerns on this invention. It is the II-II sectional view taken on the line in FIG. It is a figure which shows the effect | action of the rib in an Example. It is a figure which shows the effect | action of the rib in a comparative example. It is a figure which shows the effect | action of the rib at the time of winding the anisotropic conductive tape from which width differs. It is a front view which shows the modification of the rib arrangement | positioning in the reel for adhesive tapes. It is a front view which shows another modification of the rib arrangement | positioning in the reel for adhesive tapes. It is a front view which shows another modification of the rib arrangement | positioning in the reel for adhesive tapes. It is a figure which shows another modification of the rib arrangement | positioning in the reel for adhesive tapes. It is a figure which shows the example of the side plate which provided the window. It is a figure which shows the modification of the planar shape of a rib. It is a figure which shows the modification of the cross-sectional shape of a rib. It is a figure which shows the example of the rib provided in the peripheral part of a side plate.

  Hereinafter, preferred embodiments of the reel for adhesive tape according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a front view showing an embodiment of an adhesive tape reel according to the present invention. 2 is a cross-sectional view taken along line II-II in FIG. 1 and 2, the adhesive tape reel in the present embodiment is wound around the cylindrical core 2 around which the anisotropic conductive tape (adhesive tape) T is wound, and at both ends of the core 2. As shown in FIG. The description will be made as an adhesive tape reel 1 having a pair of side plates 3 and 3 provided facing each other so as to sandwich the core 2. The reel 1 for adhesive tape is used when manufacturing, supplying, and storing the anisotropic conductive tape T.

  For example, an anisotropic conductive tape T formed by cutting an anisotropic conductive film having a film-like base material and an adhesive layer provided on one surface thereof into a thin tape shape is wound around the core 2. The length of the core 2 in the axial direction is appropriately set according to the width of the anisotropic conductive tape T. Further, a shaft hole 4 into which a rotating shaft of a winding device or a feeding device (not shown) is inserted is provided at the center of the core 2. The shaft hole 4 has a circular cross section, for example, and when the rotary shaft is driven in a state where the rotary shaft of the winding device or the feeding device is inserted into the shaft hole 4, the reel 1 for adhesive tape rotates without spinning. It is supposed to be.

  For example, the side plate 3 has a disk shape having a sufficiently large diameter with respect to the core 2. The distance between the side plates 3 and 3 separated via the winding core 2 is appropriately set according to the width of the anisotropic conductive tape T. The thickness of the side plate 3 is 0.5 mm to 5.0 mm, preferably 0.9 mm to 3.0 mm, and more preferably about 1.0 mm to 2.0 mm. Further, the diameter of the side plate 3 is appropriately set according to the length of the anisotropic conductive tape T to be wound (the diameter of the wound body of the anisotropic conductive tape T). Since the distance between the side plates 3 and 3 tends to increase toward the peripheral edge of the side plate 3, the distance between the side plates 3 and 3 here is defined by a measured value in the vicinity of the core. Usually, the distance between the side plates 3 and 3 is set to a width of 105% to 120%, more preferably 107 to 115% with respect to the width of the anisotropic conductive tape T.

  Such an adhesive tape reel 1 may be integrally formed with the core 2 and the pair of side plates 3 and 3 by injection molding or the like, and the core 2 and the pair of side plates 3 and 3 are separately molded, You may form by fitting and adhere | attaching these. When the winding core 2 and the side plate 3 are separated, the side plate 3 having a diameter suitable for the length of the anisotropic conductive tape T to be wound is appropriately adopted, or the winding having a length suitable for the width of the anisotropic conductive tape T is adopted. There is an advantage that the lead 2 can be appropriately adopted.

  The anisotropic conductive tape T wound around the core 2 is, for example, as a connection material that performs electrical connection and mechanical fixation so as to keep the conductive state between the opposing electrodes and to keep insulation between adjacent electrodes. used. The length of the anisotropic conductive tape T is usually about 50 m to 1000 m, and is 300 m or more in this embodiment. The length of the anisotropic conductive tape T is preferably 200 m to 1000 m, and more preferably 250 m to 500 m. The width of the anisotropic conductive tape T is about 0.5 mm to 10 mm, preferably about 0.5 mm to 3.0 mm, more preferably about 0.5 mm to 2.0 mm. The anisotropic conductive tape T has a thickness of 5 μm to 100 μm, preferably 10 μm to 40 μm, more preferably about 10 μm to 20 μm. The thickness of the base material is approximately the same as the thickness of the anisotropic conductive tape T.

  Base materials are, for example, polyethylene terephthalate, polyethylene naphthalate, polyethylene isophthalate, polybutylene terephthalate, polyolefin, polyacetate, polycarbonate, polyphenylene sulfide, polyamide, ethylene / vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, synthesis It is possible to use various plastic tapes made of rubber, liquid crystal polymer or the like, or metal foil such as copper or aluminum. But the material which comprises a base material is not limited to these. Moreover, you may use as a base material what the mold release process was performed to the contact surface etc. with an adhesive bond layer. You may use what laminated | stacked the cover film for further protecting an adhesive bond layer on the adhesive bond layer provided on the one surface of the base material.

  The adhesive layer is made of, for example, an adhesive composition including an adhesive component and conductive particles contained as necessary. As the adhesive component, for example, a material that exhibits curability by heat or light can be widely applied. The use of a crosslinkable material is preferred because of excellent heat resistance and moisture resistance after connection. An epoxy adhesive containing an epoxy resin, which is a thermosetting resin, as a main component is preferable because it can be cured for a short time, has good connection workability, and is excellent in adhesion due to its molecular structure. A radical curing adhesive composition as described in International Publication No. 2009/063827 can also be used.

  Epoxy adhesives are, for example, high molecular weight epoxy, solid epoxy or liquid epoxy, or those mainly composed of epoxy modified with urethane, polyester, acrylic rubber, nitrile rubber (NBR), synthetic linear polyamide or the like. Can be used. The epoxy adhesive is generally obtained by adding a curing agent, a catalyst, a coupling agent, a filler, or the like to the above-mentioned epoxy which is a main component.

  Examples of the conductive particles include particles of metals such as Au, Ag, Pt, Ni, Cu, W, Sb, Sn, solder, and carbon. Further, coated particles in which non-conductive glass, ceramic, plastic, or the like is used as a core and the core is coated with the above metal or carbon may be used. The average particle diameter of the conductive particles is preferably 1 μm to 18 μm from the viewpoint of dispersibility and conductivity. Insulating coating particles obtained by coating conductive particles with an insulating layer may be used, and conductive particles and insulating particles may be used in combination from the viewpoint of improving the insulation between adjacent electrodes.

  The blending ratio of the conductive particles is preferably 0.1 to 30 parts by volume, and more preferably 0.1 to 10 parts by volume with respect to 100 parts by volume of the adhesive component contained in the adhesive layer. If the blending ratio is less than 0.1 part by volume, the connection resistance between the opposing electrodes tends to be high, and if it exceeds 30 parts by volume, a short circuit between adjacent electrodes tends to occur. In addition, about the component contained in these adhesive bond layers, the compounding quantity, the compounding method, etc., it is possible to use the component, the compounding quantity, the compounding method, etc. which are described in international publication 2009/063827.

  Next, the configuration of the side plate 3 described above will be described in more detail.

  As shown in FIG. 1, the inner surface 3 a of the side plate 3 is provided with a plurality of ribs 6 extending from the center side to the peripheral side of the side plate 3. More specifically, the ribs 6 linearly extend from the joint portion with the core 2 on the inner side surface 3a to the peripheral edge portion 3b, and are provided, for example, at eight intervals of 45 °. The cross-sectional shape of the rib 6 is, for example, an arc shape, and the protruding amount of the rib 6 from the inner side surface 3a of the side plate 3 is about 0.05 mm to 1.00 mm.

  Here, the pair of side plates 3 and 3 are fixed to the core 2 in a state in which the position of the rib 6 in one side plate 3 and the position of the rib 6 in the other side plate 3 are shifted from each other. The shift angle θ between the rib 6 of the one side plate 3 and the rib 6 of the other side plate 3 is appropriately set according to the length and width of the anisotropic conductive tape T to be wound. In this embodiment, for example, 5 ° to 15 °. It is °.

  In such an adhesive tape reel 1, the anisotropic conductive tape T wound around the core 2 between the pair of side plates 3 and 3, as shown in FIG. It will bend into a gentle S-shape while making point contact. Therefore, direct contact between the side portion Ta of the anisotropic conductive tape T and the inner side surface 3a of the side plate 3 can be avoided. Further, in this adhesive tape reel 1, the ribs 6 and 6 do not sandwich the same position of the anisotropic conductive tape T, so that excessive force is not applied to the anisotropic conductive tape T. Therefore, it becomes difficult for the anisotropic conductive tape T to cause peeling (blocking phenomenon) of the adhesive layer from the base material, and the blocking phenomenon is suppressed.

  Further, in the adhesive tape reel 1, the position of the rib 6 on one side plate 3 and the position of the rib 6 on the other side plate 3 are shifted from each other, as shown in FIG. The distance W1 between the side plates 3 and 3 can be made smaller than the distance W2 between the side plates 3 and 3 when the positions of 6 coincide. Thereby, since the anisotropic conductive tape T is guided with high precision by the side plates 3 and 3 at the time of winding work, the working efficiency is improved.

  Even if the rib 6 is located on one side of the anisotropic conductive tape T because the position of the rib 6 on one side plate 3 and the position of the rib 6 on the other side plate 3 are shifted. On the opposite side, there is a space between the side surface 3 and the inner side surface 3a. Therefore, even if an impact is applied to the anisotropic conductive tape T from the rib 6 side, it is considered that damage to the anisotropic conductive tape T can be mitigated as long as it does not hit the opposite side plate 3. Even when an impact is applied from the opposite side plate 3, it is considered that damage to the anisotropic conductive tape T can be mitigated as long as it does not hit the opposite side plate 3. Further, even if an impact is applied such that the anisotropic conductive tape T hits the opposite side plate 3, compared to the case where the anisotropic conductive tape T is sandwiched between the ribs 6 and 6, one side is the inner surface of the side plate 3. Since it is 3a, it is thought that the damage which the anisotropic conductive tape T receives can be relieved.

  However, as shown in FIG. 5, when the anisotropic conductive tape T having a smaller width is wound around the core 2, even if the anisotropic conductive tape T is point-contacted with the ribs 6 and 6 that are displaced from each other, S It is also possible to prevent the letter-shaped curvature from occurring. In this case, the load applied to the anisotropic conductive tape T can be reduced because the S-shaped curve does not occur, and the reliability of the anisotropic conductive tape T can be improved.

  The anisotropic conductive tape T wound around the core 2 of the adhesive tape reel 1 is assumed to be a long and narrow tape having a length of 300 m or more and a width of about 0.5 mm to 1.3 mm, for example.

  In a long tape having a length of 300 m or more, the winding body has a large diameter, and the side surface of the winding body is likely to swell during winding, and the side surface Ta of the anisotropic conductive tape T and the inner side surface 3a of the side plate 3 Direct contact tends to occur particularly easily. Therefore, as described above, the position of the rib 6 on the one side plate 3 and the position of the rib 6 on the other side plate 3 are shifted from each other. It can be effectively prevented. Moreover, in the long tape, since the number of windings on the core 2 is increased, the effect of reducing the manufacturing cost by improving the efficiency of the winding work can be obtained remarkably.

  Further, in the case of a thin tape having a width of 0.5 mm to 1.3 mm, the tape tends to easily enter the gap between the side plate 3 and the winding body when winding the core 2. Therefore, as described above, the anisotropic conductive tape T is accurately guided by the side plates 3 and 3 during the winding operation, so that it is possible to suppress the occurrence of the undulation of the side portion of the winding body of the anisotropic conductive tape T. Become.

  The anisotropic conductive tape T is fixed to the core 2 at the initial portion (winding start portion) wound around the core 2. As this fixing method, a well-known method can be used. For example, it can be fixed with an adhesive tape or an adhesive. Further, the winding core 2 can be fixed by providing a fastener or a notch. Among these, it is preferable to fix using an adhesive tape or an adhesive from the viewpoint of workability.

  The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the anisotropic conductive tape T is exemplified as the adhesive tape. However, a non-conductive tape whose adhesive layer is made of an adhesive component and does not contain conductive particles may be used. You may use the electrically conductive tape which does not have the anisotropy mix | blended more. Moreover, it is applicable also to various adhesive films, such as a die bond film, a silver film, and an adhesive film for semiconductor wafer processing. Moreover, it can apply preferably also to the electrically conductive tape which connects the electrode and tab wire of a photovoltaic cell. Further, for example, in the above-described embodiment, eight ribs 6 are provided on the side plates 3 and 3, but the number of ribs 6 can be changed as appropriate. For example, as shown in FIGS. Four, six, ten, twelve, sixteen, and twenty ribs 6 may be provided in each of 3 and 3.

  The deviation angle of the rib 6 can be appropriately changed depending on the number of ribs, but is generally preferably about 3 ° to 45 °, more preferably 5 ° to 30 °, and more preferably 5 °. More preferably, it is ˜15 °, and particularly preferably 7.5 ° to 15 °. The deviation angle θ of the rib 6 is preferably set in the range of 5 ° to 45 ° when the number of ribs 6 is four, and the range of 5 ° to 30 ° when the number of ribs 6 is six. It is preferable that Further, the deviation angle θ is preferably set in a range of 5 ° to 22.5 ° when the number of ribs 6 is eight, and is preferably 5 ° to 18 ° when the number of ribs 6 is ten. It is preferable to set the range.

  Further, the deviation angle θ is preferably set in a range of 5 ° to 15 ° when the number of ribs 6 is 12, and is 5 ° to 11.25 ° when the number of ribs 6 is 16. It is preferable to set the range. Furthermore, when the number of ribs 6 is 20, it is preferably set in a range of 5 ° to 9 °. In each of the above cases, the lower limit of the shift angle θ is preferably set to 7.5 °. When the number of ribs 6 is 4 to 16, the lower limit of the shift angle is set to 10 °. Further preferred.

  Further, the interval between the ribs 6 in the side plate 3 is not necessarily equal, and the number of the ribs 6 on the one side plate 3 and the number of the ribs 6 on the other side plate 3 do not necessarily coincide with each other. . For example, as shown in FIG. 9 (a), a pair of ribs 6 and 6 having four ribs 6 provided at equal intervals on one side plate 3 and spaced about 5 ° to 10 ° on the other side plate 3 is provided. 4 pairs may be provided at equal intervals, and the side plates 3 and 3 may be fixed so that these ribs 6 are displaced from each other.

  For example, as shown in FIG. 9B, four ribs 6 are provided on one side plate 3 at equal intervals, and eight ribs 6 are provided on the other side plate 3 at equal intervals. The side plates 3 and 3 may be fixed so that they are shifted from each other. Further, for example, as shown in FIG. 9 (c), four ribs 6 are provided at equal intervals on one side plate 3, and eight ribs 6 are provided on the other side plate 3 to fix the side plates 3 and 3 together. In this case, a total of 12 ribs 6 may be arranged at equal intervals. It should be noted that the deviation angles of all the ribs need not be constant, and the deviation angles of some ribs may be designed to be different from the deviation angles of the other ribs. Further, if necessary, a part of the rib may be in a state having no deviation angle.

  Further, as shown in FIG. 10, a window W for visually confirming the remaining amount of the adhesive tape wound around the core 2 may be provided on the side plate 3. In this case, as shown in FIG. 10A, a window W may be provided in the space between the ribs 6 and 6 in the side plate 3, and as shown in FIG. A window W may be provided instead of providing a location. Further, as shown in FIG. 10C, a window W may be provided so as to cut out a part of the pair of ribs 6 and 6.

  Further, the planar shape of the rib 6 is not limited to the one extending linearly from the core 2 side to the peripheral edge 3b as shown in FIG. 1, and is intermittently formed as shown in FIG. 11 (a). As shown in FIG. 11B, it may be formed so as to cross the radial direction without facing the center of the side plate 3. Moreover, as shown in FIG.11 (c), you may form in a wavy line shape.

  Further, the cross-sectional shape of the rib 6 is not limited to the circular arc shape as shown in FIG. 3, but as shown in FIG. 12, a triangular shape, a rectangular shape, a shape in which corners of the rectangular shape are chamfered, and these are arranged. Various shapes such as a bowl can be adopted. Further, as shown in FIGS. 13A to 13C, another rib 7 may be provided on the peripheral edge portion 3 b of the side plate 3. In addition, the rib 7 of the peripheral part 3b may be provided over the whole periphery of the peripheral part 3b of the side plate 3, or may be provided intermittently. Moreover, the rib 7 may be provided in a wavy shape, and may be provided in a double or triple manner along the peripheral edge 3b.

  In addition, when providing the rib 7 in the peripheral part 3b of the side plate 3, the position of the rib 7 of one side plate 3 and the position of the rib 7 of the other side plate may coincide with each other. Since the distance between 3 tends to increase toward the peripheral edge of the side plate 3, the effect that the distance W1 between the side plates 3 and 3 can be reduced is not hindered. In order to secure this effect, the height of the rib 7 may be lower than the height of the rib 6.

  Further, the adhesive tape reel 1 is not limited to the one in which the pair of side plates 3 and 3 are provided to face each other so as to sandwich the core 2 as shown in FIG. For example, the winding core 2 may be provided so as to protrude to the outside of the pair of side plates 3 and 3.

  Further, in the above-described adhesive tape reel 1, the anisotropic conductive tape T is wound around the core 2, but the tape that is wound around the core 2 is not limited thereto. Instead of the anisotropic conductive tape T, a non-conductive tape whose adhesive layer is made of an adhesive component and does not contain conductive particles may be wound around the core 2. Further, instead of the anisotropic conductive tape T, a conductive tape having a larger amount of conductive particles than the anisotropic conductive tape T and having no anisotropy may be wound around the core 2. Adhesive films for various electronic materials such as die bond films, silver films, and adhesive films for processing semiconductor wafers can be applied as tapes that are wound around the core 2 other than the above.

  DESCRIPTION OF SYMBOLS 1 ... Adhesive tape reel, 2 ... Core, 3 ... Side plate, 3a ... Inner side surface, 6 ... Rib, T ... Anisotropic conductive tape, (theta) ... Shift angle.

Claims (5)

A cylindrical core around which an adhesive tape can be wound;
A pair of side plates provided opposite to each other at both ends of the core, and
A plurality of ribs extending from the center side to the peripheral side of the side plate are formed on the inner side surface of the side plate,
The rib protrudes from the inner surface of the side surface;
The pair of side plates are fixed to the core in a state where the position of the ribs on one side plate is shifted from the position of the ribs on the other side plate, whereby the ribs of the one side plate are A portion of the other side plate facing the non-formed portion of the rib, a portion of the other side plate facing the non-formed portion of the rib of the one side plate, and a non-formed portion of the rib of the one side plate A portion facing the non-formed portion of the rib of the other side plate,
A reel for adhesive tape, wherein a peripheral rib is formed on the peripheral portion of the side plate over the entire periphery.   The reel for an adhesive tape according to claim 1, wherein a deviation angle between a rib on the one side plate and a rib on the other side plate is 5 ° to 15 °.   The length of the said adhesive tape wound around the said winding core is 300 m or more, The reel for adhesive tapes of Claim 1 or 2 characterized by the above-mentioned.   The reel for adhesive tape according to any one of claims 1 to 3, wherein a width of the adhesive tape wound around the core is 0.5 mm to 3.0 mm.   The said adhesive tape is a conductive tape which connects the electrode and tab wire of a photovoltaic cell, The reel for adhesive tapes as described in any one of Claims 1-4 characterized by the above-mentioned.

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