JP5607937B2 - Winding core, manufacturing method thereof, manufacturing apparatus - Google Patents

Description

The present invention relates to a winding core having a layer of a foamed resin sheet on the surface as a countermeasure for preventing the occurrence of winding steps, a manufacturing method thereof, and a manufacturing apparatus.

Long strips of sheets such as film and paper are often rolled into a roll to form a roll. However, there is a problem that the end of the sheet at the beginning of the winding is transferred to the sheet wound as a step and becomes a trace of the end face. There are things to do.

As a measure for preventing the occurrence of such an end surface step trace, a core is disclosed in which an elastic member or a foamed member is layered on the peripheral surface of a core body made of resin or metal as a cushioning material (for example, a patent References 1 and 2).

Such a cushion layer does not necessarily have good durability, and is broken or crushed by use, and the core often cannot withstand repeated use more than a certain number of times. For this reason, it can be considered that the cushion layer is detachably attached to the core body to be exchangeable. For example, the cushion layer and the core body are adhered via a peelable adhesive (see, for example, Patent Document 2).

For this purpose, first, a double-sided pressure-sensitive adhesive tape is attached to the core body, and then the release sheet of the double-sided pressure-sensitive adhesive tape is peeled off, and then an elastic sheet or foam sheet that becomes a cushion layer is attached to the exposed adhesive surface of the double-sided pressure-sensitive adhesive tape. Alternatively, an adhesive layer is provided in advance on one side of the elastic sheet or foam sheet, and a release paper is attached to the surface of the adhesive layer. After cutting the elastic sheet or foam sheet to the size of the core body, the release paper is peeled off and elasticized. Although measures such as sticking a sheet or a foamed sheet to the core body can be considered, there is a problem that the use of an adhesive tape or adhesive or the use of release paper increases labor and material costs.

Furthermore, it is also possible to apply a peelable adhesive on the back of the foam sheet and attach it to the core body. However, if the adhesive is too strong, the foam sheet is removed for replacement. Due to the trouble, the adhesive remains firmly adhered to the surface of the core body, or a part of the foam sheet is torn off and remains on the surface of the core body. It is difficult to solve such problems of residual and peeling at the same time.

JP 2003-146495 A JP 2005-162478 A

The present invention relates to a winding core having a foamed resin sheet layer as a cushion layer on the circumferential surface of the core body as a preventive measure against occurrence of end surface step traces, and a method for manufacturing the core, in which the foamed resin sheet can be replaced with a simple operation. An object is to provide a manufacturing apparatus.

  The gist of the present invention is a winding core for winding a long belt-like object, and the intermediate sheet layer that is peelably laminated on the surface of the core body and is adhered or adhered to the outer surface of the intermediate sheet layer. And a foam core having a laminated foam layer.

  The intermediate sheet layer may be a layer that is in direct contact with the surface of the core body without being sticky or bonded.

  The intermediate sheet layer may be laminated on the surface of the core body through an adhesive layer that peelably adheres to the surface of the core body.

  In the core, the intermediate sheet layer can be formed by spirally winding a belt-shaped sheet-like material around the core body at a specific spiral angle, and the foam layer forms the belt-shaped foam sheet in the sheet shape. The core body can be spirally wound around the core body with the same spiral angle as the specific spiral angle with the object in between, the phases of the spirals deviate from each other, and the edge of the sheet-like object that rotates It can be made so that the edges of the foam sheet do not match.

Further, the gist of the present invention is a step of preparing a core body, a strip-shaped sheet, a strip-shaped foam sheet having a pressure-sensitive adhesive or adhesive layer on one side,
Auxiliary cylinders are arranged coaxially on both sides in the longitudinal direction of the core body, and the core body is axially rotated together with the auxiliary cylinders so that the sheet-like material is used as one auxiliary cylinder, the core body, and the like. A winding step in which the foamed sheet is spirally wound around each outer peripheral surface of the auxiliary cylinder in this order, and the wound sheet-like material is interposed therebetween,
A winding including a separation step of separating the wound and overlapped sheet-like material and the foamed sheet between the core body and the one auxiliary cylinder and between the core body and the other auxiliary cylinder, respectively. It is in the manufacturing method of a lead.

Furthermore, the subject matter of the present invention is a step of preparing one or a plurality of core bodies, a strip-shaped sheet, a strip-shaped foam sheet provided with a layer of an adhesive or an adhesive on one side,
The core body is arranged coaxially, an auxiliary cylinder is coaxially arranged on each side in the longitudinal direction of the core body arranged coaxially, the core body is axially rotated together with the auxiliary cylinder, and the sheet The foam sheet is spirally wound around the wound sheet-like material while spirally winding the sheet-like material around each outer peripheral surface of the one auxiliary cylinder, the core body, and the other auxiliary cylinder in this order. Winding process to wind around,
Including a separation step of separating the wound and overlapped sheet-like material and the foamed sheet between the core body and the one auxiliary cylinder, and between the core body and the other auxiliary cylinder, respectively.
Support each end of each core body and each auxiliary cylinder rotatably with support means,
The side edge portion on the winding end side of the sheet-like material wound around the one auxiliary cylinder or the core body is positioned on the winding end side of the auxiliary cylinder or the core body according to the progress of winding of the sheet-like material. After winding around the end of the winding start side of the auxiliary cylinder or the core body adjacent to the one auxiliary cylinder or the core body, past the end and over the gap, Before contacting the support means in the gap, the sheet-like material or the sheet-like material and the foam sheet overlapping the sheet-like material are connected to the end of the one auxiliary cylinder or the core body on the winding end side. A sheet is continuously formed on a plurality of core bodies arranged in a line by cutting with a first cutter at a part and cutting with a second cutter at the other end of the auxiliary cylinder or the winding core side of the core body. Winding characterized by winding material It lies in a method of manufacture.

Further, the gist of the present invention is that an auxiliary cylinder that is coaxially arranged on both sides of the core body and rotates axially with the core body and sheet material supply means for supplying two sheet materials in substantially the same direction, With
Supply one sheet of the auxiliary cylinder, the core body, and the other auxiliary cylinder in this order with a band-shaped sheet and a band-shaped foam sheet having an adhesive or adhesive layer on one side The sheet material and the foamed sheet are moved by relatively moving the sheet material supplying means in the axial direction of the core body while supplying the sheet material obliquely with respect to the axial direction of the core body. The sheet-like material is wound inside and wound around the outer circumference of the core body and the auxiliary cylinder,
Further, a first cutter that cuts the sheet-like material and the foamed sheet stacked by winding at an end portion on the winding start side of the core body,
A sheet cutter and a second cutter that cuts the foamed sheet at the end of the winding end of the core body;
The foam sheet in which the sheet-like material is spirally wound around the outer peripheral surface of the one auxiliary cylinder, and the foam sheet is spirally wound with the sheet-like material interposed therebetween, and is wound around the one auxiliary cylinder After the winding edge of the foam sheet is wound around the end of the winding end of the one auxiliary cylinder, the side edge on the winding start side is wound around the winding start side end of the core body. The sheet-like material and the foamed sheet are cut with the first cutter, and the side edge portion of the foaming sheet on the winding core wound around the core body is in accordance with the progress of winding of the foamed sheet. The sheet-like material and the foamed sheet, which are stacked after being wound around the winding-side end portion of the other auxiliary cylinder after passing through the end-winding-side end portion of the main body, are cut with the second cutter and the sheet-like material. The core body around which the foam sheet is wound is attached to the auxiliary body. It lies in a manufacturing apparatus of a winding core which none to separate from the cylinder.

Furthermore, the gist of the present invention is a core manufacturing apparatus used in the core manufacturing method,
A plurality of support means for arranging the core body and the auxiliary cylinder in a row in a state in which both ends of the one or the plurality of core bodies and the auxiliary cylinder are rotatably supported;
Sheet material supply means for supplying two sheet materials in substantially the same direction,
Supply one sheet of the auxiliary cylinder, the core body, and the other auxiliary cylinder in this order with a band-shaped sheet and a band-shaped foam sheet having an adhesive or adhesive layer on one side The sheet material and the foamed sheet are moved by relatively moving the sheet material supplying means in the axial direction of the core body while supplying the sheet material obliquely with respect to the axial direction of the core body. The sheet-like material is wound inside and wound around the outer circumference of the core body and the auxiliary cylinder,
Further, one of the winding core body and the auxiliary cylinder is adjacent to one winding main body or the auxiliary cylinder on the winding start side via the support means on the winding end side of the one winding core body or the auxiliary cylinder. A first cutter that cuts the sheet-like material at the end of the one winding core body or the auxiliary cylinder at the end of winding in a gap between the winding core body or the auxiliary cylinder;
A second cutter that cuts the sheet-like material at the other winding core body or at the end of the auxiliary cylinder on the winding start side in the gap,
A sheet-like material having a width larger than the gap and a foam sheet are spirally wound around an outer peripheral surface of one core body or auxiliary cylinder on the winding start side of the core body or auxiliary cylinder. The side edge on the winding end side of the sheet-like material wound around the winding core body or the auxiliary cylinder is arranged on the winding end side of the one core body or the auxiliary cylinder as the winding of the sheet-like material proceeds. The sheet-like shape after passing through the end and after winding around the other winding core body or the end of the auxiliary cylinder on the winding start side before contacting the support means in the gap The present invention resides in that the sheet material is continuously wound around the core bodies arranged in a line by cutting the material with the first cutter and the second cutter.

According to the present invention, as a countermeasure for preventing the occurrence of end surface step traces, a core that has a foamed resin sheet layer that is a cushion layer on the circumferential surface of the core body can provide a core that can be replaced with a simple operation. The

According to the present invention, as a countermeasure for preventing the occurrence of traces of the end surface step, in the core having the foamed resin sheet layer as a cushion layer on the peripheral surface of the core body, the foamed resin sheet can be exchanged by a simple operation. Manufacturing methods are provided.

According to the present invention, as a countermeasure for preventing the occurrence of traces of the end face step, in the core provided with the foamed resin sheet layer as the cushion layer on the peripheral surface of the core body, the core capable of replacing the foamed resin sheet with a simple operation is efficiently used. A manufacturing apparatus for manufacturing is provided.

It is sectional explanatory drawing which shows an example of the aspect of the core of this invention. It is sectional explanatory drawing which shows an example of the aspect of the sheet-like material used for the core of this invention. It is sectional explanatory drawing which shows an example of the other aspect of the core of this invention. It is sectional explanatory drawing which shows an example of the other aspect of the sheet-like material used for the core of this invention. It is a perspective schematic diagram for demonstrating an example of the aspect of the method of manufacturing the winding core of this invention. It is a perspective schematic diagram for demonstrating another example of the aspect of the method of manufacturing the core of this invention. It is a perspective schematic diagram for demonstrating an example of the further another aspect of the method to manufacture the core of this invention. It is explanatory drawing which shows an example of a structure of the core of this invention. It is process explanatory drawing which shows an example of the process of manufacture of the core of this invention. It is a schematic plan view which shows an example of the aspect of the manufacturing apparatus of the core of this invention. It is side surface principal part explanatory drawing explaining the structure of the sheet material supply means in the manufacturing apparatus of the core shown in FIG. It is a schematic plan view which shows another example of the aspect of the manufacturing apparatus of the core used for implementation of this invention. It is a schematic side view of the manufacturing apparatus of the core shown in FIG. It is a schematic front view of the manufacturing apparatus of the core shown in FIG. It is sectional drawing explaining the operation state of the chuck | zipper part of the support means of the manufacturing apparatus of a core shown in FIG. It is a schematic front view which shows the state which supported the core main body and auxiliary cylinder of the manufacturing apparatus of the core shown in FIG. It is a principal part top view explaining the winding method by the manufacturing apparatus of the core shown in FIG. It is a principal part top view explaining the winding method by the manufacturing apparatus of the core shown in FIG. It is a principal part top view explaining the winding method by the manufacturing apparatus of the core shown in FIG. It is a principal part side view explaining the winding method by the manufacturing apparatus of the core shown in FIG. It is a principal part top view explaining the winding method by the manufacturing apparatus of the core shown in FIG. It is a principal part top view explaining the winding method by the manufacturing apparatus of the core shown in FIG. It is a principal part top view explaining the winding method by the implementation modified example of the manufacturing apparatus of the core shown in FIG. It is a principal part side view explaining the arrangement | positioning position in the circumferential direction of the core main body and auxiliary cylinder of the 1st cutter of the winding core manufacturing apparatus shown in FIG. 12, and a 2nd cutter. It is a schematic front view of the other implementation modification of the manufacturing apparatus of the core shown in FIG.

As shown in FIG. 1, the core 2 of the present invention is a core that winds up a long belt-like material, and an intermediate sheet layer 13 and an intermediate sheet layer 13 that are detachably laminated on the surface of the core body 4. And a foamed layer 8 laminated by sticking or adhering via an adhesive layer 9 made of an adhesive or an adhesive. The intermediate sheet layer 13 is JIS
It consists of a sheet-like material having a peel strength of 30 N / 25 mm or less with the surface of the core body 4 conforming to Z0237 as the base surface. As a result, in the core 2 of the present invention, the intermediate sheet layer 13 is covered with the foamed layer 8 so that the bonding force between the intermediate sheet layer 13 and the surface of the core body 4 is very small or hardly or not. As a result, the core structure can be used and maintained stably. Also, with this configuration, when the intermediate sheet layer 13 is unconstrained due to steric hindrance such as the covering or winding structure on the intermediate sheet layer 13 (for example, a common cut between the foam layer 8 and the intermediate sheet layer 13). In other words, it is laminated in a state where it can be peeled off from the surface of the core body 4.

  The pressure-sensitive adhesive refers to a pressure-sensitive adhesive that can be adhered without being left with a trace when it is peeled off from an adherend by being pressed at a pressure of about finger pressure at room temperature. An adhesive refers to an adhesive that can integrate two materials by bonding. Adhesion refers to a state where two surfaces are integrated by chemical or physical force or both.

  The core body 4 has a cylindrical shape or a columnar shape, preferably a cylindrical shape, and is made of, for example, a paper tube made of pulp, resin, metal, or a composite material of resin and fiber. .

  The foam layer 8 is a layer of a foam sheet made of a resin foam, and functions as a cushion layer that prevents the occurrence of end surface step traces.

  Examples of the resin foam include foamed sheets of natural rubber, isoprene rubber, styrene rubber, nitrile rubber, butadiene rubber, chloroprene rubber, urethane rubber, polyolefin resins such as polyethylene resins and polypropylene resins, polystyrene Examples thereof include foams such as polyurethane resins, polyvinyl chloride resins, polyvinyl acetate resins, and polyurethane resins.

  In the present invention, when the resin foam is a polyethylene resin foam, the resin composition is not particularly limited, and may be appropriately selected and used depending on the application. Examples of resins that can be used for the polyethylene resin foam include polyethylene and other olefins such as ethylene-propylene copolymer and terpolymer obtained by further copolymerizing butene-1 with the ethylene-propylene copolymer. Various copolymers, high pressure method low density polyethylene, low pressure method high density polyethylene, linear low density polyethylene, linear ultra-low density polyethylene, ethylene-vinyl acetate copolymer, ethylene-vinyl acetate copolymer Saponified product, ethylene- (meth) acrylic acid copolymer, ethylene- (meth) acrylic acid ester, ethylene- (meth) acrylic acid-maleic anhydride terpolymer, ethylene- (meth) acrylic acid ester- Examples thereof include maleic anhydride terpolymers, and these resins are used alone or in admixture of two or more.

  When such a polyethylene resin foam is used in the present invention, the production method is not particularly limited, and a known production method can be applied. Specific examples thereof include, for example, a method in which a foamable resin composition is mixed with a decomposable foaming agent and introduced into an extruder, the foaming agent is decomposed and foamed, a foamable resin composition is introduced into the extruder, and further The so-called extrusion foaming method, in which an evaporative solvent is injected into an extruder and foamed, is filled with a foamable resin composition together with a mixture of a decomposable foaming agent and a peroxide compound and heated under pressure to decompose the peroxide compound. The so-called block foaming method, in which the decomposable foaming agent is further decomposed and simultaneously released and foamed, is introduced into the extruder and molded into a sheet, and then irradiated with an electron beam or An atmospheric pressure cross-linking foaming method in which a peroxide compound is added to cross-link and heat foam is used.

  The foaming ratio and thickness of the foamed sheet constituting the foamed layer 8 are not particularly limited, and may be appropriately selected according to the use of the obtained core, but the foaming ratio of the foamed sheet is 1.5 to 50 times. It is preferable that an appropriate cushioning property is obtained. Moreover, it is preferable that the thickness of a foam sheet is 0.1-10 mm.

  The material of the foam sheet is within the range in which the object of the present invention is not hindered, for example, inorganic fillers such as calcium carbonate and talc, antioxidants, flame retardants, colorants, various auxiliary agents such as polyfunctional monomers, etc. May be contained.

  The intermediate sheet layer 13 is a sheet-like layer and has a function of being detached from the core body 4 integrally with the foam layer 8 when the foam layer 8 is detached from the core body 4. Examples of the sheet-like material include non-foamed resin film, foamed resin film, nonwoven fabric, paper, knitted fabric, and net-like material. The sheet-like material may be a composite sheet in which different materials such as a resin-impregnated sheet and a laminated sheet are combined.

  As the pressure-sensitive adhesive or adhesive that is the material of the adhesive layer 9, known pressure-sensitive pressure-sensitive adhesives such as rubber, acrylic, urethane, phenol, and silicone, and other known adhesives can be used. This pressure-sensitive adhesive or adhesive is preferably applied to one side of the foamed sheet 8 in advance before the foamed sheet 8 is laminated on the sheet-like material 6.

  This pressure-sensitive adhesive or adhesive may be a pressure-sensitive adhesive that can releasably bond the surfaces of the foam layer 8 and the intermediate sheet layer 13, but it may be used even if it is an adhesive that adheres so tightly that it cannot be peeled off. Is possible.

This pressure-sensitive adhesive or adhesive can be applied to one side of a foamed resin sheet that will form the foamed layer 8 by various methods. For example, an adhesive or a precursor thereof may be applied to an air knife coater, a blade coater, a bar coater, or a gravure. Examples thereof include a method of applying to one side of a foamed sheet with a coater, roll coater, curtain coater, die coater, knife coater, screen coater, Meyer bar coater, kiss coater, etc., and drying or heating.

  Alternatively, the adhesive layer 9 may be formed by a double-sided adhesive tape. That is, an adhesive or adhesive layer may be formed on the back surface of the foam sheet using a double-sided adhesive tape, and the foam sheet may be wound around the surface of the intermediate sheet layer 13. Alternatively, the foamed resin sheet 8 may be wound around the intermediate sheet layer 13 after forming a pressure-sensitive adhesive or adhesive layer on the surface of the intermediate sheet layer 13 with a double-sided pressure-sensitive adhesive tape.

  As the sheet-like material, a non-foamed resin film is more preferable in terms of shape stability, thinness and predetermined strength. Non-foamed resin film materials include polyvinylidene chloride resin, polyethylene resin, plasticized polyvinyl chloride resin, poly-4-methylpentene-1 resin, polylactic acid resin, polyethylene terephthalate, polyethylene naphthalate, polypropylene Examples thereof include vinyl resins and vinyl chloride resins. The non-foamed resin film may be unstretched, but may be a film stretched in a uniaxial direction or a biaxial direction such as longitudinal or lateral.

  In the case of a conventional core in which a foam sheet is laminated directly on the surface of the core body via an adhesive, if the foam sheet is damaged or aged due to use, the foam sheet is wound for replacement. When peeling from the core body, the foam sheet torn off by the peeling operation often remains adhered to the surface of the core body, and part of the adhesive may remain on the surface of the core body due to trouble. For this reason, it was necessary to clean the surface of the core body before winding a new foam sheet around the core body.

  On the other hand, in the core 2 of the present invention, when the foamed layer 8 is damaged or deteriorated due to use, the foamed sheet constituting the foamed layer 8 is removed from the core body for replacement. The torn foam sheet does not remain adhered to the surface of the core body, and a part of the adhesive does not remain on the surface of the core body. The operation | work which cleans the surface of the core main body 4 like a conventional winding core is unnecessary. Therefore, the foam sheet constituting the foam layer 8 is integrally peeled off from the core body 4 together with the intermediate sheet layer 13 to newly form a sheet-like material and the foam layer 8 that will form a new intermediate sheet layer 13. The foamed layer 8 can be replaced by a simple operation of winding the foam sheet to be wound around the core body 4 in this order.

  In the present invention, the operation itself of peeling the foamed layer 8 together with the intermediate sheet layer 13 from the core body 4 is much easier than the conventional operation of peeling only the foamed sheet from the core body. . The foamed sheet constituting the foamed layer 8 is flexible and low in strength, so if one end of the sheet is grabbed and peeled off at once, it is difficult to perform the operation of peeling at a high speed at once. 13 is peeled off from the core body 4 together with the core 13, because it is rigid to some extent and has high strength, so that the foam layer 8 and the intermediate sheet layer 13 surrounding the core body 4 are wound together. It is possible to make a cut in the longitudinal direction of the core body 4, grasp one end of the cut portion, and easily and quickly peel it off at a high speed, and the peeling operation is short and easy.

  The intermediate sheet layer 13 may be a layer that is in direct contact with the surface of the core body 4 without sticking or bonding. For example, the surface of the core body 4 such as a resin film, non-woven fabric, paper, knitted fabric, and net-like material that does not adhere to or adhere to the surface of the core body 4 does not adhere to or adhere to the surface of the core body 4. It may be one that is directly wrapped around. Alternatively, a configuration may be adopted in which a heat-shrinkable tubular film that does not adhere to or adhere to the surface of the core body 4 is covered with the core body 4 and then the tubular film is heat-shrinked.

  The intermediate sheet layer 13 is most preferable in that the operation in which the intermediate sheet layer 13 is peeled from the surface of the core body 4 directly on the surface of the core body 4 without sticking or adhering over the entire inner surface is short and easy. In order to facilitate the manufacturing process, the inner surface of the intermediate sheet layer 13 and the surface of the core body 4 are very limited, for example, at the end of the core body 4 or at the joint of the intermediate sheet layer 13. It may be partially adhered through the adhesive layer in the region. Even in such an aspect, the intermediate sheet layer 13 is substantially free from adhesion and adhesion to the surface of the core body 4, and the above-described peeling operation is short and easy. It is done. In the present specification, the intermediate sheet layer 13 is a layer that is in direct contact with the surface of the core body 4 without being adhered or adhered to the surface of the core body 4. In this case, the layer is a layer that is in direct contact with the surface without sticking or adhering.

  Further, the intermediate sheet layer 13 is provided with an adhesive layer that peelably adheres to the surface of the core body 4, and the intermediate sheet layer 13 is laminated on the surface of the core body 4 via the adhesive layer. May be. As shown in FIG. 2, the sheet-like material 13 a that forms such an intermediate sheet layer 13 includes a pressure-sensitive adhesive layer 10 on one side of the base sheet 7. The adhesive strength measured as the adhesive strength of the sheet-like material 13a to the acrylic plate according to JIS Z0237 is preferably 0.1 N / 25 mm or more and 4 N / 25 mm or less. The pressure-sensitive adhesive layer 10 may be provided so as to be disposed over the entire inner surface of the intermediate sheet layer 13 or may be provided so as to be disposed on a part of the inner surface.

  The pressure-sensitive adhesive layer 10 does not need to have a strong adhesive force, and has a slightly adhesive property that enables a stable winding operation when a sheet-like material is wound around, for example, the core body 4 in the step of forming the intermediate sheet layer 13. What is necessary is just to have adhesive force. That is, the sheet-like material constituting the intermediate sheet layer 13 may have slight adhesiveness. This aspect is preferable when the intermediate sheet layer 13 is formed by winding a sheet-like material around the core body 4. If the adhesive force is too large, it is difficult to easily peel off the intermediate sheet layer 13 from the core body 4. It is preferable that the adhesive force measured as the adhesive force with respect to the acrylic board according to JISZ0237 of a sheet-like material provided with the adhesive layer 10 is 0.1N / 25mm or more and 4N / 25mm or less.

  As shown in FIG. 3, the core 2 x of the present invention using such a slightly adhesive sheet-like material has a removable slightly adhesive pressure-sensitive adhesive layer 22 on the peripheral surface of the core body 4. A sheet-like material 20 provided on the back surface is wound as an intermediate sheet layer 13, and a foamed sheet 28 is laminated as a foamed layer 8 on the surface of the wound sheet-like material 20 via an adhesive or an adhesive 9.

Such a sheet-like material having slight adhesiveness can be formed by applying a re-peelable slightly-adhesive pressure-sensitive adhesive that forms the slightly-adhesive pressure-sensitive adhesive layer 22 on one side of the sheet-like material 20. . A re-peelable, slightly-adhesive pressure-sensitive adhesive is an adhesive that adheres to an adherend when the adhesive is stuck to the adherend and then peeled off. The adhesive remains and can be peeled off, and is a pressure-sensitive adhesive having a function of being able to stick the pasted product to the adherend again.
The adhesive strength measured as the adhesive strength of the sheet-like material 20 having slight adhesiveness to an acrylic plate according to Z0237 is 0.1 N / 25 mm or more and 4 N / 25 mm or less.

  As this slightly tacky pressure-sensitive adhesive, a pressure-sensitive adhesive of the same type as that used for a re-peelable pressure-sensitive adhesive label or a re-peelable pressure-sensitive adhesive tape can be used. For example, known removable pressure-sensitive adhesives such as rubber, acrylic, urethane, phenol, and silicone can be used. Specific examples of acrylic resin-based adhesives include single weights such as acrylic acid, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, ethyl methacrylate, butyl methacrylate, and acrylonitrile. Examples thereof include a polymer or a copolymer. Specific examples of the synthetic rubber pressure-sensitive adhesive include styrene-butadiene rubber, polyisobutylene rubber, isobutylene-isoprene rubber, isoprene rubber, styrene-isoprene block copolymer, styrene-butadiene block copolymer, styrene-ethylene-butylene block. Examples thereof include copolymers and ethylene-vinyl acetate thermoplastic elastomers. These pressure-sensitive adhesives can be used alone or in combination of two or more.

The slightly adhesive pressure-sensitive adhesive layer 22 can be formed by various methods, for example, an air knife coater, a blade coater, a bar coater, a gravure coater, a roll coater, a curtain coater, Examples thereof include a method of applying to the back surface of the sheet-like material 20 with a die coater, knife coater, screen coater, Meyer bar coater, kiss coater, etc. and drying or heating.

  The sheet-like material having slight adhesiveness may be a two-layer film obtained by melt coextrusion molding of a raw resin for a non-foamed resin film and a raw resin for a removable adhesive layer. . Alternatively, as shown in FIG. 4, a non-foamed resin film layer 40, a base material layer 41, and a releasable adhesive layer 44 may be a multi- (3) layer structure film 46 laminated in this order. The film 46 having a multi- (3) layer structure is obtained by melt coextrusion molding of a raw material resin constituting each layer. The sheet-like material having such a configuration can use a resin that is compatible with the raw resin of the non-foamed resin film layer 40 or the resin that constitutes the intermediate layer as the raw resin of the removable adhesive layer 44. In such a case, since the bonding force between the resin constituting the non-foamed resin film layer 40 or the resin constituting the intermediate layer and the releasable adhesive layer 44 is large, the sheet-like material is wound around the core body and then peeled off. Furthermore, there is almost no phenomenon that a part of the substance constituting the removable adhesive layer 44 remains on the surface of the core body and is difficult to remove.

  For example, when a polypropylene resin is used as the raw resin for the non-foamed resin film layer 40, examples of the raw resin for the removable adhesive layer 44 include ethylene, propylene, 1-butene, 1-pentene, and 3-methyl-1- Of α-olefins having 2 to 12 carbon atoms such as butene, 1-hexene, 4-methyl-1-pentene, 3-methyl-1-pentene, 1-heptene, 1-octene, 1-decene, 1-dodecene, etc. A homopolymer or a copolymer may be mentioned. Among them, a branched olefin is preferable, and 4-methyl-1-pentene is particularly preferable. As the α-olefin copolymer comprising a combination of these α-olefins, a raw material resin mainly composed of a copolymer composed of three components of propylene, 1-butene, and an α-olefin having 5 to 12 carbon atoms. Is exemplified.

  The outer surface of the non-foamed resin film layer 40 is preferably non-self-adhesive. When the surface is non-self-adhesive, it is preferable that when the core 2x is manufactured, the operation of laminating the foamed resin sheet 8 on the surface with an adhesive or an adhesive 9 is performed smoothly. The non-self-adhesive film refers to a film having a value measured as an adhesive force on the surface of the resin film to an acrylic plate according to JIS Z0237 of 1 N / 25 mm or less.

  Although the thickness of a sheet-like material is not specifically limited, When a sheet-like material consists of a non-foamed resin film, it is preferable that it is 5-60 micrometers. If the resin film is too thin, it tends to wrinkle when wound around the core body 4. If it is too thick, the gap between the sheet-like materials wound around the core body 4 tends to become obvious.

  In the present invention, the sheet-like material constituting the intermediate sheet layer 13 (FIG. 1) may be a non-self-adhesive sheet. A non-self-adhesive sheet does not stick or adhere to the core 4 when mounted on the core 4, but a book in which a foam layer 8 is laminated on the outside of such a sheet with an adhesive 6 In the structure of the invention, the intermediate sheet layer 13 is not pressed by the foam layer 8, and the intermediate sheet layer 13 is not displaced or dropped from the core 4. Non-self-adhesive sheet-like materials are preferable in this respect because they are easier to produce than (fine) adhesive sheets and are easily available from the market. Further, the operation of peeling the foamed layer 4 from the core 4 together with the intermediate sheet layer 13 for replacement is very easy.

As the non-self-adhesive sheet material, a normal non-foamed resin film, foamed resin film, non-woven fabric, paper, knitted fabric, net-like material, and the like can be used. This non-self-adhesiveness means that the value measured as the adhesive strength of the sheet-like surface to the acrylic plate according to JIS Z0237 is 0.5 N / 25 mm or less. Those having the property are referred to as those which do not adhere to or adhere to the surface of the adherend.

  As described above, in the conventional core in which only the foam sheet is wound around the core body 4 via the adhesive, the adhesive is used when the foam sheet is peeled off from the core body 4 for replacement. Tends to remain on the surface of the core body 4. Alternatively, a part of the material constituting the foamed sheet tends to be peeled off from the foamed resin sheet and remain on the surface of the core body 4 while being bonded to the adhesive. Therefore, it is necessary to clean the surface of the core body 4 before removing a new foam sheet around the core body 4 and to remove the remaining adhesive.

  In the present invention, as described above, since no adhesive or torn foam sheet remains on the surface of the core body 4 when the foam layer 8 is replaced, there is no need to remove them. The operation itself of peeling the layer 8 together with the intermediate sheet layer 13 from the core body 4 is much easier than the conventional operation of peeling only the foamed sheet from the core body 4. The foamed sheet is flexible and low in strength, so if you grab one end of the sheet and peel it off at once, it will be difficult to tear off at a high speed at once, but the foamed layer 8 together with the intermediate sheet layer 13 is an integral core. When peeling from the main body 4, the intermediate sheet layer 13 is somewhat rigid and has high strength and high strength. Therefore, the longitudinal direction of the core body 4 is integrated into a sheet-like material in which the foam layer 8 and the intermediate sheet layer 13 are integrated by adhesion or adhesion. It is possible to make a cut in the direction, grasp one end of the cut portion of the sheet-like material, and easily and quickly peel it off, and the peeling operation is short and easy.

  Although the method for manufacturing the core of the present invention is not particularly limited, it can be manufactured by winding a sheet-like material around the peripheral surface of the core body 4 and then winding a foam sheet having an adhesive layer on one side.

  In the present invention, the foamed sheet may be wound after the sheet-like material is wound around the core, but the foamed sheet is wound around the wound sheet-like material while the sheet-like material is wound around the core. Also good. That is, the foamed sheet may be wound around the surface of the wound sheet-like material while the sheet-like material is wound around the core. In any case, in the present invention, the sheet is wound around the core, and the foamed sheet is wound around the wound sheet.

  The mode of winding the sheet-like material around the core body 4 or winding the foamed sheet around the core body 4 around which the sheet-like material is wound is not particularly limited. For example, as shown in FIG. The article 94 a may be wound around the core body 4 so that the joint 98 is parallel to the longitudinal direction of the core body 4. Winding of the foam sheet around the core body 4 around which the sheet-like material is wound can be similarly performed using a rectangular foam sheet. At this time, the joint of the sheet-like material and the joint of the foamed sheet are not matched in the radial direction of the core body 4. The strip-shaped foam sheet may be spirally wound after the sheet-like material is wound around the core in the embodiment shown in FIG. Or you may wind a foam sheet in the aspect shown in FIG. 5, after winding a belt-shaped sheet-like material around a core. At this time, as shown in FIG. 6, the edges of the sheet-like material 94 a that are brought together may be adhesively fixed to the surface of the core body 4 via the double-sided adhesive tape piece 95 at the joint 98.

  Alternatively, as shown in FIG. 7, a parallelogram sheet 94b may be wound around the core body 4 so that the joint 98b is spiral. Winding of the foam sheet around the core body 4 around which the sheet-like material is wound can be similarly performed using a rectangular foam sheet. At this time, the joint of the sheet-like material and the joint of the foamed sheet are not matched in the radial direction of the core body 4.

  In order to form the intermediate sheet layer 13 on the peripheral surface of the core body 4 by winding the sheet-like material, it is uniform that the belt-shaped sheet material is spirally wound around the peripheral surface of the core body 4 with as little gap as possible. Layer formation is preferable. In order to wind a foam sheet as a cushion layer as the outermost layer around the core body 4, a belt-shaped foamed resin sheet is spirally wound around the core body 4 with a sheet-like material wound around the circumferential surface without gap as much as possible. Is preferable because a uniform layer can be formed.

  At this time, as shown in FIG. 8 (1), the spiral phase of the strip-shaped sheet 64 and the spiral phase of the strip-shaped foam sheet 74 are shifted, and the spiral 96 of the edge of the sheet-form 64 and the foam sheet 74 are shifted. It is preferable not to overlap the spiral 98 of the edge. Alternatively, as shown in FIG. 8 (2), the winding direction of the spiral 96 at the edge of the strip-shaped sheet 64 may be different from the winding direction of the spiral 98 at the edge of the strip-shaped foam sheet 74. The spiral angle of the strip-shaped sheet and the strip-shaped foam sheet may be made different from each other so that the width of the strip-shaped sheet is different from the width of the strip-shaped foam sheet.

Moreover, the core of the present invention can be efficiently manufactured by the manufacturing method described below.

The method for manufacturing the core of the present invention includes:
A step of preparing a core body, a long strip-shaped sheet, a long strip-shaped foam sheet having a layer of an adhesive or an adhesive on one side;
As shown in FIG. 9 (1), auxiliary cylinders 60 and 62 having substantially the same diameter as the core body 4 are coaxially arranged on both sides in the longitudinal direction of the core body 4 via a connecting member (not shown). The main body 4 is pivoted together with the auxiliary cylinders 60 and 62, and the sheet-like material 64 is placed on the outer peripheral surfaces of the one auxiliary cylinder 60, the core body 4 and the other auxiliary cylinder 62 in the manner shown in FIG. A winding step in which the foamed sheet 74 is wound in a spiral manner with the spirally wound in order and the wound sheet-like material in FIG.
As shown in FIG. 9 (3), the sheet material 64 and the foamed sheet 74 that are wound and overlapped are placed between the core body 4 and the one auxiliary cylinder 60, and between the core body 4 and the other auxiliary cylinder 62. And a separation step of separating each of them.

  In the embodiment of the present invention shown in FIG. 9, the sheet-like object 64 is wound around the outer peripheral surfaces of one auxiliary cylinder 60, the core body 4, and the other auxiliary cylinder 62 while being spirally wound in this order. The foam sheet 74 may be spirally wound with a sheet-like material in between. That is, the foam sheet 74 is placed on the core body 4 in the order of the core body 4 by overlapping the sheet-like object 64 with the side of the garment provided with the adhesive or adhesive layer 9 (FIG. 1) facing the outer surface of the sheet-like article 64. It may be wound in a spiral. Alternatively, after the sheet-like material 64 is spirally wound around the outer peripheral surfaces of the one auxiliary cylinder 60, the core body 4, and the other auxiliary cylinder 62 in this order, the wound sheet-like material is interposed therebetween. The foam sheet 74 may be wound spirally. That is, after the sheet-like material 64 is spirally wound around the outer peripheral surfaces of one auxiliary cylinder 60, the core body 4, and the other auxiliary cylinder 62 in this order, foaming is performed on the surface of the wound sheet-like material 64. The sheet 74 may be wound spirally.

  In this separation step, after the winding step is finished, the rotation of the core body 4 and the auxiliary cylinders 60 and 62 is stopped, and the sheet material 64 and the foamed sheet 74 which are wound and overlapped are cut at the predetermined position with a cutter tool or the like. However, the manufacturing process 55 can be made more efficient by cutting in the course of the winding process using the core manufacturing apparatus 55 of the present invention shown in FIG.

The core manufacturing device 55 is:
Auxiliary cylinders 60 and 62 having the same diameter as the core body 4, which are coaxially arranged on both sides of the core body 4 and rotate together with the core body 4;
Sheet material supply means 69 for supplying two sheet materials (sheet-like material 64 and foamed sheet 74) in substantially the same direction is provided.

  The core body 4 and the auxiliary cylinders 60 and 62 are detachably connected coaxially.

  The core body 4 and the auxiliary cylinders 60 and 62 are driven by the rotation driving means 114. The rotation driving unit 114 includes a motor 141 and a driving belt 142 that is stretched between the output shaft of the motor 141 and the support shaft 33 of the auxiliary cylinder 60 via a pulley.

  One auxiliary cylinder 60, the core body 4, and the other auxiliary cylinder 62 are each provided with a sheet-like material 64 having a long belt shape and a layer of adhesive or adhesive on one side by the sheet material supply means 69 in this order. The sheet material supply means 69 is moved relatively in the axial direction of the core body 4 while supplying the long strip-shaped foam sheet 74 obliquely with respect to the axial direction of the core body 4. The object 64 and the foamed sheet 74 are spirally wound around the outer peripheral surfaces of the core body 4 and the auxiliary cylinders 60 and 62 with the sheet-like object 64 inside.

  For this purpose, the sheet material supply means 69 includes a reel portion 11a in which a long belt-like sheet material 64 is wound in advance, and a guide roller 12a for guiding the sheet material 64 fed out from the reel portion 11a. The sheet-like material 64 is supplied obliquely at a predetermined angle with respect to the axial direction of the core body 4. The sheet material supply means 69 includes a reel portion 11b in which a long strip-shaped foam sheet 74 is wound in advance, and a guide roller 12b for guiding the foam sheet 74 fed out from the reel portion 11b. The sheet 74 is supplied obliquely at a predetermined angle with respect to the axial direction of the core body 4.

  The reel portion 11a and the reel portion 11b are fixed to a common moving frame 102 and are moved by the moving means 104 in synchronization with each other.

  The moving means 104 includes a feed screw mechanism 121 and a motor 123 that rotates the screw shaft 122 of the feed screw mechanism 121, and winds the sheet material supply means 69 in synchronization with the shaft rotation of the core body 4. The core body 4 is translated in the axial direction.

  Thus, the core manufacturing apparatus 55 of the present embodiment obliquely applies the sheet material (the sheet-like material 64 and the foamed sheet 74) to the outer peripheral surface of the core body 4 that rotates on the axis by the sheet material supply means 69 at the same angle. The sheet-like material 64 and the foamed sheet 74 are spirally wound around the outer peripheral surface of the core body 4 by moving the sheet material supply means 69 in parallel by the moving means 104 while supplying the sheet material. As shown in FIG. 10, the core manufacturing apparatus 55 of the present embodiment is configured to start winding a sheet material from the left side toward the drawing and finish winding on the right side of the drawing, on the outer peripheral surface of the core body 4. ing. Therefore, in FIG. 10, the left side of the drawing is the “winding start side” in the core manufacturing apparatus 55, and the right side of the drawing is the “winding end side”.

  The core manufacturing apparatus 55 further cores the sheet-like material 64 and the foamed sheet 74 stacked by winding between one auxiliary cylinder 60 and the core body 4 adjacent to the one auxiliary cylinder 60. The sheet-like object 64 overlapped by winding between the first cutter 90 cut at the end E1 on the winding start side of the main body 4, the core main body 4, and the other auxiliary cylinder 62 adjacent to the core main body 4. And a second cutter 92 that cuts the foamed sheet 74 at an end E2 on the winding end side of the core body 4.

  The sheet material wound around the auxiliary cylinders 60 and 62 becomes a piece.

  A sheet-like object 64 having a width W is spirally wound around the outer peripheral surface of one auxiliary cylinder 60, and a foam sheet 74 having a width W is spirally wound around the wound sheet-like object 64. The side edge portion L1 on the winding start side of the foam sheet 74 wound around the auxiliary cylinder 60 passes through the end portion on the winding end side of the one auxiliary cylinder 60 as the winding of the foam sheet 74 proceeds, and the winding of the core body 4 is continued. After winding around the end E1 on the start side, the stacked sheet-like material 64 and the foam sheet 74 are cut with a first cutter, and the side edge L1 on the start side of the foam sheet 74 wound around the core body 4 is a foam sheet. After passing the end of the winding end of the core body 4 with the progress of winding 74, the stacked sheet-like material 64 and the foamed sheet 74 are cut by the second cutter 92, whereby the sheet-like material 64 and the foamed material 74 are foamed. Sheet 74 was wound Separating the core body 4 from the auxiliary cylinder 60, 62.

  The first cutter 90 is provided at a position where the sheet material (the stacked sheet-like material 64 and the foamed sheet 74) is cut at the end E1 on the winding start side of the core body 4, and the second cutter 92 is the core body. 4 is provided at a position where the sheet material is cut at the end E2 on the winding end side.

  The first cutter 90 and the second cutter 92 are provided to be movable forward and backward with respect to the outer peripheral surface of the core body 4. For example, the first cutter 90 is fixed to a swingable lever (not shown), and the second cutter 92 is fixed to another swingable lever (not shown). Alternatively, the first cutter 90 and the second cutter 92 are fixed to one swingable lever (not shown). By raising and lowering the lever, the first cutter 90 and the second cutter 92 can be moved back and forth with respect to the outer peripheral surface of the core body 4, and the sheet material can be rotated at each position when necessary. Can be cut inside.

  The sheet material supply means 69 supplies the sheet-like material 64 and the foamed sheet 74 simultaneously to the object to be wound (core body 4, auxiliary cylinders 60, 62) in substantially the same direction, and the wound sheet. The spiral phase of the object 64 and the spiral phase of the wound foam sheet 74 are supplied to the object to be wound substantially in parallel so that they do not match. FIG. 11 shows the positional relationship of the side surfaces of the reel unit 11a, the reel unit 11b, the guide roller 12a, the guide roller 12b, the core body 4, the first cutter 90, and the second cutter 92. Reference numeral 65a denotes a reel core of the reel portion 11a, and reference numeral 65b denotes a reel core of the reel portion 11b.

  When the sheet-like material 64 or the foamed sheet 74 is wound around the reel core using release paper so that it does not stick between the sheets adjacent to each other when the sheet core 64 or the foamed sheet 74 is wound around the reel core 65a or the reel core 65b, the sheet material is supplied. The means 69 is provided with a release paper take-out means (not shown), and the release paper take-out means takes up the release paper as the sheet-like material 64 and the foamed sheet 74 are sent out.

  Moreover, it is preferable that the auxiliary cylinder 60 includes a fixing means (not shown) that detachably fixes the front end portion in the longitudinal direction of the winding of the sheet-like object 64 on the peripheral surface of the auxiliary cylinder 60 or in the vicinity of the upper side before starting the winding. . This fixing means may be a mechanical fixing means such as a clip, screwing, locking, etc., but a structure composed of an adhesive layer obtained by sticking a double-sided adhesive tape to the peripheral surface is simple in structure and operation. It is preferable.

  Furthermore, it is preferable that the auxiliary cylinder 62 includes a fixing means (not shown) that attaches and detachably adheres to the peripheral surface of the auxiliary cylinder 62 when the winding end portion of the sheet-like object 64 is wound. As this fixing means, an adhesive layer obtained by attaching a double-sided pressure-sensitive adhesive tape to the peripheral surface is preferable because of its simple structure and operation.

Further, the core of the present invention can be more efficiently manufactured by using a core manufacturing apparatus 55a shown in FIG. 12 described below.

The core manufacturing apparatus 55a of the present invention includes:
Auxiliary cylinders 60 and 62 having the same diameter as the core body 4, which are coaxially arranged on both sides of the core body 4 and rotate together with the core body 4;
Sheet material supply means 69 for supplying two sheet materials (sheet-like material 64 and foamed sheet 74) in substantially the same direction, auxiliary cylinders 60 and 62, and a plurality of core bodies 4 (hereinafter also referred to as cylinder material P) A plurality of support means 3A to 3E for arranging the cylindrical material P in a row in a concentric state, and the cylindrical material P supported by the support means 3A to 3E are simultaneously rotated in a shaft while both ends of the cylindrical material P are rotatably supported. The rotation driving means 104, the moving means 102 for moving the sheet material supply means 69 in the axial direction of the cylindrical material P, and the sheet material S wound around the outer peripheral surface of the cylindrical material P are cut at the positions of the support means 3B to 3E. A plurality of first cutters 5 and second cutters 6 are provided. The sheet material S is a state in which a long strip-shaped sheet 64 and a long strip-shaped foam sheet 74 having a pressure-sensitive adhesive or adhesive layer on one side are arranged in parallel and partially overlap in the width direction. belongs to.

  In this embodiment, as shown in FIG. 12, a total of two relatively long long cylindrical materials P1 (core body 4) are arranged in the middle part by the support means 3A to 3E, and a total of two at both ends thereof. Although the comparatively short short cylinder material P2 (auxiliary cylinders 60 and 62) is arranged, of course, embodiment is not limited to this. By increasing or decreasing the number of support means, for example, three or more long cylindrical materials P1 may be arranged in the middle portion, and a total of two short cylindrical materials P2 may be arranged at both ends thereof. In the present embodiment, the sheet material S is wound around the entire surface of the outer peripheral surface of the long cylindrical material P1 in the middle portion, whereas the sheet is applied to only a part of the outer peripheral surface of the short cylindrical material P2 at both ends. The material S is wound. The sheet material S wound around the short cylindrical material P2 at both ends becomes a cut end.

  The core body 4 and the cylindrical material P are driven by the rotation driving means 114. The rotation driving unit 114 includes a motor 141 and a driving belt 142 that is stretched between the output shaft of the motor 141 and the support shaft 33 of the auxiliary cylinder 60 via a pulley.

  While supplying the sheet material S to the one auxiliary cylinder 60, the core body 4, 4 and the other auxiliary cylinder 62 in this order by the sheet material supply means 69 obliquely with respect to the axial direction of the core body 4, By moving the sheet material supply means 69 relatively in the axial direction of the core body 4, the sheet material S is spirally wound around the outer peripheral surface of the cylindrical material P with the sheet-like material 64 inside. .

  For this purpose, the sheet material supply means 69 includes a reel portion 11a in which a long belt-like sheet material 64 is wound in advance, and a guide roller 12a for guiding the sheet material 64 fed out from the reel portion 11a. The sheet-like material 64 is supplied obliquely at a predetermined angle with respect to the axial direction of the core body 4. The sheet material supply means 69 includes a reel portion 11b in which a long strip-shaped foam sheet 74 is wound in advance, and a guide roller 12b for guiding the foam sheet 74 fed out from the reel portion 11b. The sheet 74 is supplied obliquely at a predetermined angle with respect to the axial direction of the core body 4.

  The reel portion 11a and the reel portion 11b are fixed to a common moving frame 102 and are moved by the moving means 104 in synchronization with each other.

  The moving means 104 includes a feed screw mechanism 121 and a motor 123 that rotates the screw shaft 122 of the feed screw mechanism 121, and winds the sheet material supply means 69 in synchronization with the shaft rotation of the core body 4. The core body 4 is translated in the axial direction.

  In this way, the core manufacturing apparatus 55a of the present embodiment supplies the sheet material S to the outer peripheral surface of the cylindrical material P rotating about the shaft by the sheet material supply means 69 obliquely at the same angle. Is moved in parallel by the moving means 104, and the sheet material S is spirally wound around the outer peripheral surface of the tubular material P. As shown in FIG. 12, the core manufacturing apparatus 55a of the present embodiment is configured to start winding a sheet material from the left side toward the drawing and finish winding on the right side of the drawing on the outer peripheral surface of the cylindrical material P. Yes. Accordingly, in FIG. 12, the left side of the drawing is the “winding start side” in the core manufacturing apparatus 55a, and the right side of the drawing is the “winding end side”. The same applies to FIGS. 14 to 19, 21, 22, and 25.

  As shown in FIGS. 14 and 15, the support means 3 </ b> A to 3 </ b> E are rotatably supported by a support frame 31 disposed on a base 207 and an upper end portion of the support frame 31 via a bearing 32. A cylindrical support shaft 33 and a chuck portion 34 that is provided at an end portion of the support shaft 33 and holds the cylinder inner surface of the end portion of the cylindrical material P are provided. In the present embodiment, a total of five support means 3 </ b> A to 3 </ b> E are arranged in a row on the base 207. Of these support means 3A-3E, the support means 3A located on the leftmost side (winding start side) is provided with a chuck portion 34 only at one end of the support shaft 33, and the other support means 3B-3. 3E is provided with a pair of chuck portions 34 at both ends of the support shaft 33.

  As shown in FIG. 15, the chuck portion 34 includes a piston 341 provided in the cylinder of the support shaft 33 so as to be movable back and forth in the axial direction, a coil spring 342 that biases the piston 341 in the backward direction, and a piston 341. A moving piece 343 fixed to the tip, a fixing piece 345 fixed to the outer surface of the support shaft 33, and a C-shape disposed between the tapered surface 344 of the moving piece 343 and the tapered surface 346 of the fixing piece 345. The chuck piece 347 and an O-ring 348 fitted in the outer peripheral groove of the chuck piece 347 are configured.

  As shown on the left side of the alternate long and short dash line in FIG. 15, the chuck portion 34 retracts the piston 341 by the urging force f of the coil spring 342 to bring the tapered surface of the moving piece 343 closer to the tapered surface of the fixed piece 345. By pushing the chuck piece 347 outward in the radial direction of the support shaft 33 with both tapered surfaces, the cylinder inner surface of the tubular material P is held by the chuck piece 347. On the other hand, as shown on the right side of the alternate long and short dash line in FIG. 15, compressed air A is supplied into the cylinder of the support shaft 33 through the pipe 135, and the piston 341 is advanced against the coil spring 342 by the air pressure a. By moving the taper surface of the moving piece 343 away from the taper surface of the fixed piece 345, the chuck piece 347 is allowed to move inward in the radial direction of the support shaft 33, and the holding of the tubular material P by the chuck piece 347 is released. In FIG. 15, the state in which the cylindrical material P is held and fixed is illustrated on the left side of the alternate long and short dash line, and the state in which the cylindrical material P is released from being held and fixed is illustrated on the right side of the dashed line. The pair of chuck portions 34 of the support means 3B to 3E operate simultaneously depending on whether or not the compressed air A is supplied.

  Further, as shown in FIG. 14, the support frames 31 of the support units 3 </ b> B to 3 </ b> E are provided so as to be able to reciprocate in the axial direction of the cylindrical material P. That is, a guide rail 311 parallel to the axial direction of the cylindrical material P is laid on the base 207, and a base 313 is fixed on a slider 312 that moves along the guide rail 311. A support frame 31 is erected. A stay 314 is fixed at a required position of the guide rail 311, and a fluid pressure cylinder 315 is provided on the stay 314. An advance / retreat rod of the fluid pressure cylinder 315 is connected to the base 313.

  The support frame 31 of each of the support means 3B to 3E is reciprocated in the axial direction of the cylinder member P by advancing and retracting the advance / retreat rod of the fluid pressure cylinder 315. As a result, as shown in FIGS. 14 and 16, it is possible to easily attach the tubular material P between the support means 3 </ b> A to 3 </ b> E, and both ends of each tubular material P are supported by the support means 3 </ b> A to 3 </ b> E. A plurality of cylindrical materials P can be arranged in a row in a concentric state while being rotatably supported. As shown in FIG. 16, when a plurality of cylindrical materials P are arranged in a row by the supporting means 3 </ b> A to 3 </ b> E, the cylindrical material P on the winding start side is adjacent to the winding end side of the cylindrical material P. A gap G is formed between each of the support members 3B to 3D between the other cylinder members P.

  Further, the stays 314 of the support units 3B to 3E are fixed along the guide rails 311 so that their positions can be adjusted. Therefore, the fixing position of the stay 314 can be appropriately adjusted according to the length of each cylindrical material P, and a change in the length of the cylindrical material P can be easily handled.

  As shown in FIG. 16, the rotation driving means 4 is stretched between a motor 141 provided on a base 207 and an output shaft of the motor 141 and a support shaft 33 of the support means 3A via a pulley. Drive belt 142. In this embodiment, since both ends of the cylindrical material P are held and fixed by the chuck portion 34 of the support shaft 33 rotatably supported in each of the support means 3A to 3E, the support means 3A positioned closest to the winding start side. By rotating and driving the support shaft 33 by the motor 141, the plurality of cylindrical materials P arranged in a row can be simultaneously rotated. Of course, not only the support shaft 33 of the support means 3A but also the support shafts of the other support means 3B to 3E may be driven to rotate.

  As shown in FIG. 13, the first cutter 5 and the second cutter 6 are provided in the respective support means 3B to 3E, and the sheet material S wound around the outer peripheral surface of the cylindrical material P is supported by the respective support means 3B to 3B. The sheet material S is cut so as not to come into contact with the support frame 31 of 3E. The first cutter 5 is provided at a position where the sheet material S is cut at the end E1 on the winding end side of the one cylindrical material P on the winding start side, and the second cutter 6 is another cylindrical material on the winding end side. It is provided at a position where the sheet material S is cut at the end E2 on the winding start side of P.

  As shown in FIG. 13, the first cutter 5 and the second cutter 6 are provided so as to be movable back and forth with respect to the outer peripheral surface of the cylindrical material P. That is, the lever 51 is swingably provided on the base 313 of each of the support means 3B to 3E, and the first cutter 5 and the second cutter 6 are fixed to the lever 51. By raising and lowering the lever 51, the first cutter 5 and the second cutter 6 can be moved back and forth with respect to the outer peripheral surface of the cylindrical material P, and the sheet material S can be cut at each position when necessary. it can.

  Hereinafter, a sheet material winding method by the core manufacturing apparatus 55a of the present embodiment will be described.

  First, as shown in FIG. 14, the support frames 3 of the support means 3 </ b> B to 3 </ b> E are moved forward and backward in order and the chucks 134 are operated to support a plurality of cylindrical materials P and both ends of the cylindrical materials. They are arranged in a line while being rotatably supported by means 3A-3E.

  Next, as shown in FIG. 12, a width Ws larger than the gap G between the tubular materials P is formed on the outer peripheral surface of the tubular material P on the winding start side among the multiple tubular materials P arranged in a row. The sheet material S that has it is wound spirally.

  Then, as shown in FIG. 17, the winding of the sheet material S around the outer peripheral surface of one cylindrical material P on the winding start side is advanced, and as shown in FIG. 18, the side edge on the winding end side of the sheet material S After the part L1 passes over the end E1 on the end of winding of one cylindrical material P, passes over the gap G, and winds around the end E2 on the winding start side of the other cylindrical material P (reference numeral B in FIG. 18). The sheet material S starts to be cut from the side edge L1 on the winding end side by the first cutter 5 at the end E1 on the winding end side of the one cylindrical material P (see symbol C in FIG. 18). . In addition, what is instruct | indicated by the code | symbol L2 is a side edge part by the side of the winding start of the sheet | seat material S in the figure.

  Then, the winding of the sheet material S is advanced as it is, and as shown in FIG. 19, the side edge L1 on the winding end side of the sheet material S is further increased at the end E2 on the winding start side of the other cylindrical material P. Cutting is started with the second cutter 6 (see symbol D in FIG. 19). In this way, by cutting the side edge L1 on the winding end side of the sheet material S with the first cutter 5 and the second cutter 6, respectively, as shown in FIG. The sheet material S does not come into contact with the support frame 31 of the support means 3B to 3E in the gap G and the winding operation is not hindered.

  Further, as shown in FIG. 21, when the winding of the sheet material S is advanced while cutting the sheet material S with the first cutter 5 and the second cutter 6, as shown in FIG. Without stopping the manufacturing apparatus 55a, the sheet material S can be wound around the outer peripheral surface of the other cylindrical material P on the winding end side. Thus, the sheet material S is continuously wound around the plurality of cylindrical materials P arranged in a row.

  In the core manufacturing apparatus 55a, when the sheet material S is spirally wound around the outer peripheral surface of the cylindrical material P, the sheet material S is wound around the outer periphery of the cylindrical material P by winding a double-sided tape (not shown) together with the sheet material S. The adhesive layer may be formed on the outer peripheral surface of the cylindrical material P in advance, and the sheet material S may be wound on the adhesive layer. For example, as shown in FIG. 23, a double-sided pressure-sensitive adhesive tape 210 having a peelable adhesive layer is wound around the circumferential surface of the end portion on the winding start side and the end portion on the winding end side of the cylindrical material P in advance. However, it is preferable to ensure winding at the time of winding operation of the sheet-like material 64 around the cylindrical material P at these end portions. This double-sided pressure-sensitive adhesive tape 210 can be easily peeled off from the core body together with the sheet material S after use of the core.

  Use of such a double-sided pressure-sensitive adhesive tape 210 ensures winding of the sheet-like material 64 around the tubular material P at the end when a non-adhesive sheet-like material is used as the sheet-like material 64. Therefore, it is not necessary to use a slightly sticky sheet material as the sheet material 64, and a general-purpose sheet material such as a film, paper, or nonwoven fabric can be used as the sheet material. It is preferable in terms of saving material costs.

  As described above, according to the sheet material winding method and the core manufacturing apparatus 55a of the present embodiment, the plurality of cylindrical members P are arranged in a row by the plurality of support units 3A to 3E, and the plurality of cylindrical members P are aligned. Since the sheet material S is spirally wound while the sheet material S is cut by the first cutter 5 and the second cutter 6 in the gap G, the sheet material S is supported by the support means 3B to 3D in the gap G. The sheet material S can be continuously wound around the plurality of cylindrical materials P arranged in a row without contacting the support frame 31. Therefore, compared with the case where the sheet material is wound around the cylinder material one by one, the sheet material can be wound around each cylinder material under more uniform winding conditions. It is possible to reduce the waste of the piece on the end side.

  Moreover, according to the sheet material winding method and the core manufacturing apparatus 55a of the present embodiment, as shown in FIG. 18, the sheet material S wound around the outer peripheral surface of one cylindrical material P located on the winding start side. After the side edge portion L1 on the winding end side is wound around the end portion E2 on the winding start side of the other cylindrical material P located on the winding end side, the side edge portion L1 is turned into one cylindrical material by the first cutter 5 Since the sheet material S is cut at the end E1 on the winding end side of P, when the sheet material S is wound around the outer peripheral surface of another cylindrical material P, the tension of the sheet material S does not change, and a plurality of cylindrical materials The sheet material S can be wound over the P under more uniform winding conditions.

  Further, according to the sheet material winding method and the core manufacturing apparatus 55a of the present embodiment, since both ends of each cylindrical material P are supported by the supporting means 3A to 3E, a plurality of cylindrical materials P are provided. Can be more accurately arranged in a row in a concentric state. Therefore, as in the case where, for example, a plurality of cylinders are inserted into the cylinders and arranged in a row, the mandrel is bent by the weight of the plurality of cylinders, and the concentric state is not impaired. Accordingly, the sheet material S can be wound around the plurality of tubular materials P under more uniform winding conditions.

  Furthermore, in the sheet material winding core manufacturing apparatus 55a of the present embodiment, the support frames 31 of the support means 3B to 3E are provided so as to be movable forward and backward in the axial direction of the cylindrical material P. The cylindrical materials P can be quickly and accurately arranged in a line, and the sheet material S can be wound efficiently.

  The sheet material winding method and the core manufacturing apparatus 55a of the present embodiment have been described above, but the present invention can be implemented in other forms.

  For example, in the above embodiment, the first cutter 5 and the second cutter 6 are spaced apart from the gap G in the axial direction of the tubular material P as shown in FIG. Although it arrange | positions in the same position in the circumferential direction of the material P, this invention is not limited to this. As shown in FIG. 18, the first cutter 5 has another cylindrical material P in which the side edge L1 on the winding end side of the sheet material S wound around the outer peripheral surface of one cylindrical material P is located on the winding end side. Before the side edge portion L1 comes into contact with the support frame 31 of the support means 3B to 3E in the vicinity of the end portion E1 on the winding end side of the one cylindrical material P. In addition, the side edge L1 may be provided at a position where the end E1 on the winding end side of one cylindrical material P is cut (see range R5 in FIG. 24). On the other hand, as shown in FIG. 18, the second cutter 6 is another cylinder in which the side edge L1 on the winding end side of the sheet material S wound around the outer peripheral surface of one cylindrical material P is located on the winding end side. After the tubular material P is rotated for a while after being wound around the end portion E2 on the winding start side of the material P, the side edge portion L1 is supported in the vicinity of the end portion E2 on the winding start side of the other tubular material P. Before contacting the support frame 31 (FIG. 13) of ˜3E (FIGS. 12 and 13), the side edge L1 is provided at a position where it is cut at the end E2 on the winding start side of the other cylindrical material P. (See range R6 in FIG. 24). Thus, the 1st cutter 5 and the 2nd cutter 6 do not necessarily need to be arrange | positioned in the same position in the circumferential direction of the cylindrical material P. FIG.

  Further, like the support means 3F shown in FIG. 25, each support means may be configured to be detachable from the base 207. In this way, the number of supporting means arranged on the base 207 can be appropriately increased or decreased according to the number of cylinders P arranged in a row, and it is possible to easily cope with a change in the number of cylinders P. it can.

  In the above embodiment, the sheet material supply means 69 is moved with respect to the cylindrical material P by the moving means 2. However, the cylindrical material P should be moved in the axial direction with respect to the sheet material supply means 69. The support means 3A to 3E may be moved in parallel in the axial direction of the cylindrical material P in synchronization with the axial rotation of the cylindrical material P.

  The sheet material supply means 69 supplies the sheet-like material 64 and the foamed sheet 74 simultaneously to the object to be wound (core body 4, auxiliary cylinders 60, 62) in substantially the same direction, and the wound sheet. The spiral phase of the object 64 and the spiral phase of the wound foam sheet 74 are supplied to the object to be wound substantially in parallel so that they do not match.

  When the sheet-like material 64 or the foamed sheet 74 is wound around the reel core using release paper so that it does not stick between the sheets adjacent to each other when the sheet core 64 or the foamed sheet 74 is wound around the reel core 65a or the reel core 65b, the sheet material is supplied. The means 69 is provided with a release paper take-out means (not shown), and the release paper take-out means takes up the release paper as the sheet-like material 64 and the foamed sheet 74 are sent out.

  Moreover, it is preferable that the auxiliary cylinder 60 includes a fixing means (not shown) that detachably fixes the front end portion in the longitudinal direction of the winding of the sheet-like object 64 on the peripheral surface of the auxiliary cylinder 60 or in the vicinity of the upper side before starting the winding. . This fixing means may be a mechanical fixing means such as a clip, screwing, locking, etc., but a structure composed of an adhesive layer obtained by sticking a double-sided adhesive tape to the peripheral surface is simple in structure and operation. It is preferable.

  Furthermore, it is preferable that the auxiliary cylinder 62 includes a fixing means (not shown) that attaches and detachably adheres to the peripheral surface of the auxiliary cylinder 62 when the winding end portion of the sheet-like object 64 is wound. As this fixing means, an adhesive layer obtained by attaching a double-sided pressure-sensitive adhesive tape to the peripheral surface is preferable because of its simple structure and operation.

  When the long belt-shaped sheet 64 is a non-self-adhesive sheet, not only the auxiliary cylinders 60 and 62, but at least the end circumference of the upstream side in the moving direction of the sheet material S of all the cylinder materials P It is necessary to provide an adhesive layer on the surface in order to ensure temporary bonding with the sheet-like material 64 at the time of cutting by the cutters 5 and 6. It is preferable that the adhesive layer for this is provided in the surrounding surface of the both ends of all the cylinder materials P. FIG. This adhesive layer can be formed, for example, by attaching a peelable adhesive tape to the peripheral surface of the end portion of the tubular material P before starting the winding of the sheet S.

  In addition, the present invention can be carried out in a mode in which various improvements, modifications and variations are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention. In addition, any invention specific matter may be replaced with another technology within the scope of the same action or effect, and the integrally configured invention specific matter is constituted by a plurality of members. Alternatively, the invention specific items configured by a plurality of members may be implemented in an integrated configuration.

  As the core body, an ABS cylindrical shape having an outer diameter of 92 mm, an inner diameter of 76 mm, and a length of 400 mm was used.

A film 46 having a three-layer structure in which a non-foamed resin film layer 40, a base material layer 41, and a releasable adhesive layer 44 shown in FIG. The film 46 used is a polypropylene-based coextruded biaxially stretched multilayer film (made by Futamura Chemical Co., Ltd .: SAF-100B) having a thickness of 40 μm. The adhesive strength of the adhesive layer of this film was 1 N / 25 mm. The self-adhesion force of the non-foamed resin film layer 40 of this film on the side of the film was 0.1 N / 25 mm or less. A polyethylene foam sheet (trade name: Torrepef) with a thickness of 1 mm and a firing ratio of 10 times is used as the foam sheet for forming the foam layer 8, and an adhesive (trade name: acrylic resin adhesive manufactured by Toyo Ink Co., Ltd.) on one side in advance. (Coating amount: 32 g / m ² ).

  Using the same apparatus as shown in FIG. 10, the belt-like sheet-like material having a width of 120 mm was spirally wound around the core body with the adhesive surface inside. The belt-like polyethylene foam sheet with a width of 100 mm was spirally wound around this sheet-like material with the adhesive inside, to form a foam layer 8 as a cushion layer to obtain a core. Both the sheet-like material and the foamed sheet were firmly held by the core body, and did not peel off during use of the core. After repeatedly using the winding core three times, the polyethylene foam sheet was cut along the sheet in the longitudinal direction of the winding core, and then peeled off integrally from the end of the cut portion. The peeling operation was performed smoothly, and no trace of adhesive was observed on the surface of the core body after peeling.

  A core was obtained in the same manner as in Example 1 except that a belt-shaped polyethylene film with a thickness of 10 μm and a thickness of 30 μm was used as the sheet-like material forming the intermediate sheet layer 13. At this time, the width of the foam sheet was also set to 10 cm and wound in the same direction. Further, the phase of the spiral was shifted by 7 cm between the sheet-like material and the foamed sheet. Both the sheet-like material and the foamed sheet were firmly held by the core body, and did not peel off during use of the core. After repeatedly using the winding core three times, the polyethylene foam sheet was cut along the sheet in the longitudinal direction of the winding core, and then peeled off integrally from the end of the cut portion. The peeling operation was performed smoothly. Naturally, no trace of the adhesive was observed on the surface of the core body after peeling.

[Comparative example]
A polyethylene foam sheet with a pressure-sensitive adhesive similar to that used in the examples was directly wound around the core body similar to that used in the examples to form a cushion layer to obtain a core. The cushion layer was firmly bonded to the core body, and did not peel off during use of the core. The polyethylene foam sheet as the cushion layer was peeled off after repeatedly using the core 3 times. During the peeling, the polyethylene foam sheet was torn and the peeling operation was not performed smoothly and was difficult to peel off. Many traces of the pressure-sensitive adhesive were found on the surface of the core body after peeling, and a cleaning operation was necessary to remove the pressure-sensitive adhesive on the surface of the core body when reused.

The core of the present invention can be suitably used as a core for various films and papers, since it can eliminate the trouble that the end of the sheet at the beginning of winding is transferred to a sheet wound as a step and becomes an end surface step trace. In particular, it can be suitably used as a core for use in an electronic film such as an optical film for a liquid crystal display or a copper-laminated film for a printed board, a separator sheet for a printing paper or a battery.

2, 2x: Core 4: Core body 8: Foam layer 9: Adhesive layer 13: Intermediate sheet layer 13a, 20, 64: Sheet material 22: Slightly adhesive layer 55: Core manufacturing device 60, 62: auxiliary cylinder 28, 74: foam sheet 69: sheet material supply means 90: first cutter 92: second cutter 104: moving means 114: rotation driving means

Claims (5)

A winding core for winding a long strip,
A core body,
An intermediate sheet layer that is releasably laminated through the removability of the pressure-sensitive adhesive layer on the surface of the core body,
A foam layer laminated adhered or bonded to the outer surface of the intermediate sheet layer,
Equipped with a,
Wherein the intermediate sheet layer said foamed layer, to the feature to be peeled integrally from the core body Rumakishin. The intermediate sheet layer is formed by spirally winding a belt-shaped sheet material around the core body at a specific spiral angle, and the foam layer includes a belt-shaped foam sheet between the sheet materials. The core body is spirally wound at the same spiral angle as the specific spiral angle, the phases of the spirals are shifted from each other, and the edge of the sheet-like material that circulates, and the edge of the foam sheet that circulates The core according to claim 1, wherein the cores do not match. A step of preparing one or a plurality of core bodies, a strip-shaped sheet, and a strip-shaped foam sheet provided with a layer of an adhesive or an adhesive on one side;
The core body is arranged coaxially, an auxiliary cylinder is coaxially arranged on each side in the longitudinal direction of the core body arranged coaxially, the core body is axially rotated together with the auxiliary cylinder, and the sheet The foam sheet is spirally wound around the wound sheet-like material while spirally winding the sheet-like material around each outer peripheral surface of the one auxiliary cylinder, the core body, and the other auxiliary cylinder in this order. Winding process to wind around,
A separation step of separating the wound and overlapped sheet-like material and the foamed sheet between the core body and the one auxiliary cylinder, and between the core body and the other auxiliary cylinder, respectively .
Including
Support each end of each core body and each auxiliary cylinder rotatably with support means,
The side edge portion on the winding end side of the sheet-like material wound around the one auxiliary cylinder or the core body is positioned on the winding end side of the auxiliary cylinder or the core body according to the progress of winding of the sheet-like material. After winding around the end of the winding start side of the auxiliary cylinder or the core body adjacent to the one auxiliary cylinder or the core body, past the end and over the gap, Before contacting the support means in the gap, the sheet-like material or the sheet-like material and the foam sheet overlapping the sheet-like material are connected to the end of the one auxiliary cylinder or the core body on the winding end side. by cutting with a second cutting in winding start side end portion of the other of the auxiliary cylinder or the core body with cut with the first cutter in part, successively in the plurality of core bodies arranged in a row It is characterized by winding sheet material Method of manufacturing a core. An auxiliary cylinder that is coaxially arranged on both sides of the core body and rotates with the core body ; and
Sheet material supply means for supplying two sheet materials in substantially the same direction ;
With
Supply one sheet of the auxiliary cylinder, the core body, and the other auxiliary cylinder in this order with a band-shaped sheet and a band-shaped foam sheet having an adhesive or adhesive layer on one side The sheet material and the foamed sheet are moved by relatively moving the sheet material supplying means in the axial direction of the core body while supplying the sheet material obliquely with respect to the axial direction of the core body. The sheet-like material is wound inside and wound around the outer circumference of the core body and the auxiliary cylinder,
Furthermore, the first cutter that cuts the sheet-like material and the foamed sheet stacked by winding at the end portion on the winding start side of the core body,
A sheet cutter and a second cutter that cuts the foamed sheet at the end of the winding end of the core body;
The foam sheet in which the sheet-like material is spirally wound around the outer peripheral surface of the one auxiliary cylinder, and the foam sheet is spirally wound with the sheet-like material interposed therebetween, and is wound around the one auxiliary cylinder After the winding edge of the foam sheet is wound around the end of the winding end of the one auxiliary cylinder, the side edge on the winding start side is wound around the winding start side end of the core body. The sheet-like material and the foamed sheet are cut with the first cutter, and the side edge portion of the foaming sheet on the winding core wound around the core body is in accordance with the progress of winding of the foamed sheet. The sheet-like material and the foamed sheet, which are stacked after being wound around the winding-side end portion of the other auxiliary cylinder after passing through the end-winding-side end portion of the main body, are cut with the second cutter and the sheet-like material. The core body around which the foam sheet is wound is attached to the auxiliary body. Apparatus for manufacturing a core which none to separate from the cylinder. An apparatus for manufacturing a core used in the method for manufacturing a core according to claim 3 ,
A plurality of support means for arranging the core body and the auxiliary cylinder in a row in a state in which both ends of the one or the plurality of core bodies and the auxiliary cylinder are rotatably supported;
Sheet material supply means for supplying two sheet materials in substantially the same direction ;
With
Supply one sheet of the auxiliary cylinder, the core body, and the other auxiliary cylinder in this order with a band-shaped sheet and a band-shaped foam sheet having an adhesive or adhesive layer on one side The sheet material and the foamed sheet are moved by relatively moving the sheet material supplying means in the axial direction of the core body while supplying the sheet material obliquely with respect to the axial direction of the core body. The sheet-like material is wound inside and wound around the outer circumference of the core body and the auxiliary cylinder,
further,
Of the core body and the auxiliary cylinder, one core body on the winding start side or the auxiliary cylinder and another winding adjacent to each other via the support means on the winding end side of the one core body or the auxiliary cylinder. A first cutter that cuts the sheet-like material at the end of the winding core body or the auxiliary cylinder at the end of winding in a gap between the core body and the auxiliary cylinder;
A second cutter that cuts the sheet-like material at the other winding core body or at the end of the auxiliary cylinder on the winding start side in the gap,
A sheet-like material having a width larger than the gap and a foam sheet are spirally wound around an outer peripheral surface of one core body or auxiliary cylinder on the winding start side of the core body or auxiliary cylinder. The side edge on the winding end side of the sheet-like material wound around the winding core body or the auxiliary cylinder is arranged on the winding end side of the one core body or the auxiliary cylinder as the winding of the sheet-like material proceeds. The sheet-like shape after passing through the end and after winding around the other winding core body or the end of the auxiliary cylinder on the winding start side before contacting the support means in the gap An apparatus for manufacturing a core, wherein a sheet material is continuously wound around the core bodies arranged in a row by cutting a material with the first cutter and the second cutter.

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