CN104661943A

CN104661943A - Film roll core, film roll, film roll manufacturing method, and film take-up device

Info

Publication number: CN104661943A
Application number: CN201380040347.2A
Authority: CN
Inventors: 野田悦希; 笹井弘治; 风藤修
Original assignee: Kuraray Co Ltd
Current assignee: Kuraray Co Ltd
Priority date: 2012-07-30
Filing date: 2013-07-23
Publication date: 2015-05-27
Anticipated expiration: 2033-07-23
Also published as: JP6170921B2; CN104661943B; KR20150039779A; KR102234044B1; TWI567017B; TW201418134A; WO2014021146A1; JP6359725B2; JP2017165588A; JPWO2014021146A1

Abstract

The present invention addresses the problem of providing: a film roll core which offers excellent handleability since both end portions thereof have sufficient strength and can be held, and achieves reduced weight and cost, and in which even if condensation occurs on the inner peripheral surface thereof, the condensation does not easily flow to the outside; a film roll core wherein even when wear and the like occur, members other than a worn member can be reused; and a film roll core wherein slipping does not easily occur between a holding member and the film roll core, and a film can be stably wound. The present invention relates to: a film roll core provided with a cylindrical core tube, the core tube having, axially in the center thereof, a thin portion with an inner diameter larger than that of both end portions; a film roll core provided with a cylindrical core tube, the core tube having a cylindrical edge member detachably attached to each of both end portions; and a film roll core provided with a cylindrical core tube and having, at both ends thereof, an engagement portion for restricting relative rotation with respect to a holding member.

Description

The manufacture method of film roll core, film roll, film roll and the batch up gear of film

Technical field

The present invention relates to film roll core, use the film roll of this film roll core, the batch up gear of the manufacture method of this film roll and film.

Background technology

As film roll, there is the structure that will rectangular winding film to the core of tubular obtains.Specifically, such as exist polyvinyl alcohol based polymer film (following, sometimes " polyvinyl alcohol based polymer " brief note is made " PVA ") be wound up into structure on the core of tubular, described polyvinyl alcohol based polymer film is as uses such as the paper in reels for the manufacture of polarizing film.The polarizing film formed by this PVA film is such as used in flat-panel monitor (Liquid Crystal Display etc.).Recently, along with the maximization of flat-panel monitor, also seek the structure that PVA thin-film width is wider.

Realize the lightweight of film roll core and the raising of intensity in order to the maximization of the film roll along with such PVA film, propose the film roll core (with reference to Japanese Unexamined Patent Publication 2006-205536 publication) of carbonfiber reinforced plastics.

Patent documentation 1: Japanese Unexamined Patent Publication 2006-205536 publication.

Summary of the invention

But there is the leeway of improvement further in the film roll core described in above-mentioned publication in intensity and cost.Namely, usually film is being batched to film roll core or from the operation that film launches by film roll, by the bar-like member had to film roll core insertion batch up gear or the expanding unit of tubular, and be fixed on these devices at film roll core inner via bar-like member, carry out the operation batched or launch.In addition, on pallet film roll being placed on conveying or from the operation that pallet unloads too, the film roll core sometimes to tubular inserts support rod, and carries out via this support rod.But, special in seeking wider PVA film due to more maximizing of flat-panel monitor, or when changing the viewpoint of miscellaneous degree of operation from the film roll reduced when film roll uses and make the spooling length of film longer, produce the needs increased by the axial length of film roll core, or the weight of film roll increases further, thus, in the film roll core described in above-mentioned publication, even if in the scope allowed relative to PVA film, also slightly bend on per unit length, so add the flexure slightly of this per unit length, the above-mentioned bar-like member of easy generation or support rod become difficulty to the insertion of film roll core, or bring the undesirable condition of damage to film roll core inner due to bar-like member or support rod.In addition, especially because above-mentioned bar-like member has the structure of more complicated, so the manufacture of longer bar-like member is difficult to fix at film roll core inner.

As the means eliminating such problem, consider not use bar-like member or support rod to keep the method at the both ends of film roll core, such as, consider the method being kept the both ends of film roll core by the inward at both ends side from film roll core respectively in the axial direction with predetermined length amounts insertion holding member (chuck portion).

But, when being used in the film roll core of the general cylindrical shape axially not having internal diameter to change, produce the problem that its both ends kept easily are damaged or are out of shape.When in order to eliminate this problem make the thickness of film roll core entirety thicken simply, with regard to the film roll core of carbonfiber reinforced plastics, cost is caused to raise, with regard to metal film roll core, its excessive mass increases, and film roll is with core self and use the disposal of the film roll of film roll core to reduce.

In addition, in the above-mentioned methods, special when the weight of film roll increases further etc., produce following problem: if repeatedly use film roll core, then the wearing and tearing, damage, distortion etc. of film roll core easily occur in the part contacted with the holding member of larger power effect.In addition, namely allow to use the holding member such as bar-like member or support rod, at both ends, film roll core still easily weares and teares.Film roll core there occurs such wearing and tearing etc., need again to manufacture overall for film roll core from beginning, so be miscellaneous, or waste of material, or cost rising.

And then, when the weight of film roll described above increases further etc., easily skid between holding member and film roll core, thus the rotary power easily producing holding member can not be passed to film roll core fully or film roll core carries out the problems such as unexpected rotation.In addition, namely allow to use the holding member such as bar-like member or support rod, still easily to skid between these holding members and film roll core.

In addition, cold place etc. in the winter time, if site of storage film roll never being carried out air-conditioning is transported into air-conditioned processing factory, then condenses on the surface of film roll sometimes.Particularly the nearest weight due to film roll as already described increases, so result from the increase of heat absorption capacity of film roll and the decline of the temperature changing speed of film roll entirety adjoint with it, and more easily condenses.Such condensation especially easily occurs on the inner peripheral surface of the film roll core of the tubular easily affected by film temperature.If condensed at the inner peripheral surface of film roll core, then the rotation etc. when vibration when being carried by film roll or film roll are used, makes the water produced because condensing flow out from the interior of film roll core and arrive film, the Quality Down of film.

The present invention completes in view of the foregoing, first problem of the present invention is a kind of such film roll core: both ends have enough intensity and can keep with both ends, disposal is good, even and if realize lightweight and cost degradation and condensation occurs on the inner peripheral surface of film roll core also not easily flowing out to outside, also provide the property disposed good and the film roll of impact that condenses of light weight and low cost and not being vulnerable to and the manufacture method of this film roll.

In addition, second problem of the present invention is to provide a kind of manufacture method of such film roll core, film roll and film roll: even if when there occurs wearing and tearing etc. on film roll core, also can by there occurs wearing and tearing etc. worn part beyond parts recycling, and do not need again to manufacture film roll core entirety from beginning.

And then, 3rd problem of the present invention is to provide a kind of such film roll core, film roll, the manufacture method of film roll and the batch up gear of film: what have at batch up gear or expanding unit etc. not easily skids between the holding member of film roll core and film roll core for keeping, and stably can carry out the winding and expansion etc. of film.

In order to solve above-mentioned first problem, film roll core of the present invention is the film roll core of the core pipe of the tubular comprising coiled film, and core pipe has the internal diameter thinner wall section larger than both ends at axial central portion.

The both ends of this film roll core have enough intensity, even if when the weight of the longer situation of the axial length of film roll core or film roll increases further, also can with on keep the mode at its both ends to be stably the assembled to holding member that can rotate that batch up gear or expanding unit etc. have, by the rotation of this holding member, can launch on winding film to film roll core or by film from film roll.In addition, this film roll core has thinner wall section, so can realize lightweight and cost degradation due to the axial central portion at core pipe.

And then, this film roll core is larger than both ends because the axial central portion (thinner wall section) of core pipe is set to internal diameter, even if so condense on the inner peripheral surface of film roll core, consequent water also accumulates on the inner peripheral surface of thinner wall section, not easily externally flows out.Therefore, the Quality Down of the film on this film roll core is not easily wound on.

This film roll with core preferably, core pipe has tube body and the wall components of tubular, and this wall components is disposed in the both ends of this tube body and forms the boundary wall adjacent with the two ends of the inner peripheral surface of thinner wall section.Thereby, it is possible to easily and reliably form the internal diameter thinner wall section larger than two ends at the axial central portion of core pipe.

Preferably, above-mentioned wall portion part embeds the insert portion be installed in tube body.Thus, the stationary state of tube body and wall components (insert portion) becomes more reliable.

This film roll with core preferably, core pipe is metal.Intensity and the processability of core pipe can be improved thus further.Particularly preferably be, this metal is carbon steel.The intensity of core pipe can be improved thus further.

This film roll core preferably implements plating to the inner peripheral surface of thinner wall section.Thus, the corrosion stability of this part improves, even if when the water such as produced because of the condensation occurred on the inner peripheral surface of film roll core accumulates on the inner peripheral surface of thinner wall section, also can prevent the corrosion of the inner peripheral surface of film roll core.

This film roll with core preferably, core Guan Qi both ends have the edge member of the tubular that can install removably.If used repeatedly in the mode at the both ends keeping film roll core, then easily to wear and tear at these both ends, damage, distortion etc., by making formation as above, the old edge member that there occurs wearing and tearing etc. is departed from from the parts beyond the edge member of the formation such as tube body and wall components core pipe, the edge member that the assembling in generation is new, thus can by the parts recycling beyond these edge members.

This film roll with core preferably, have the engagement section for limiting the relative rotation relative to holding member at its both ends, described holding member is for keeping film roll core.Thus, when this film roll core is assembled on batch up gear or when film roll is assembled on expanding unit etc., the engagement section of this film roll core can engage with the corresponding engagement section being arranged on the holding member side that can rotate that batch up gear or expanding unit etc. have, limit the relative rotation of film roll core relative to this holding member, film roll core can be made to rotate together with holding member, or can prevent the accident of film roll core from rotating.In addition preferably, the above-mentioned engagement section of film roll core is concavity.Thereby, it is possible to suppress the engagement section when carrying this film roll core or use the film roll of this film roll core to be damaged.

Preferably, this film roll core also comprises the key member forming above-mentioned engagement section.Such as, thus, when making engagement section there occurs wearing and tearing etc. by repeatedly using, by making the old key member that there occurs wearing and tearing etc. depart from from core pipe, the key member that the assembling in generation is new, can recycle core pipe.

In addition, film roll of the present invention comprises above-mentioned film roll core and is wound on the rectangular film on this film roll core.

In this film roll, as already described, in above-mentioned film roll core, both ends have enough intensity, even if when the weight of the longer situation of the axial length of film roll core or film roll increases further, also can with on keep the mode at its both ends to be stably the assembled to holding member that can rotate that expanding unit has, by the rotation of this holding member, film can be launched from film roll, and achieve lightweight and cost degradation, even and if then condense on the inner peripheral surface of film roll core, consequent water also not easily flows out to outside, so good about the film roll also property disposed, light weight and low cost, be not vulnerable to the impact condensed.

In this film roll preferably, film is PVA film.PVA film is required higher quality situation about using as the paper in reel for the manufacture of polarizing film is inferior, and aquagenic impact is also comparatively large, so play effect of the present invention more significantly.

In addition, the manufacture method of film roll of the present invention comprises: above-mentioned film roll core is assembled to the operation on batch up gear; With to be rotated by the film roll core making to be assemblied on batch up gear and by rectangular winding film to the operation on film roll core.

In the manufacture method of this film roll, as already described, owing to achieving lightweight in above-mentioned film roll core, so the operation be assembled on batch up gear can be carried out with comparalive ease, easily can depart from from batch up gear in addition.In addition, in film roll core, cost degradation is also achieved.Thus, according to this manufacture method, film roll can be manufactured with low cost swimmingly.

In the manufacture method of this film roll preferably, in above-mentioned assembly process, the opposed holding member that can rotate for a pair had by batch up gear keeps the both ends of film roll core, is assembled on batch up gear by film roll core.Thus, the bar-like member of the such problem not using easy generation to illustrate, just stably can be assembled to film roll core on the holding member of batch up gear, by the rotation of this holding member, film can be wound up on film roll core swimmingly.

In the manufacture method of this film roll preferably, film is PVA film.PVA film is required higher quality situation about using as the paper in reel for the manufacture of polarizing film is inferior, and aquagenic impact is also comparatively large, so play effect of the present invention more significantly.

In order to solve above-mentioned second problem, film roll core of the present invention is the film roll core of the core pipe of the tubular comprising coiled film, and core Guan Qi both ends have the edge member of the tubular that can install removably.

Even if this film roll core is when there occurs wearing and tearing etc., depart from from the parts beyond the edge member of formation core pipe by making the old edge member that there occurs wearing and tearing etc., the edge member that the installation in generation is new, can by the parts recycling beyond edge member, and not need again to manufacture film roll core entirety from beginning.

This film roll with core preferably, core pipe is metal.Intensity and the processability of core pipe can be improved thus further.Particularly preferably be, this metal is carbon steel.Thereby, it is possible to improve the intensity of core pipe further.

This film roll with core preferably, plating is implemented to the inner peripheral surface of core pipe.Cold place etc. in the winter time, when site of storage film roll never being carried out air-conditioning is transported into air-conditioned processing factory, condenses on the surface of film roll sometimes.Particularly, the weight of film roll increases as already described recently, so result from the increase of heat absorption capacity of film roll and the decline of the temperature changing speed of film roll entirety adjoint with it, more easily condenses.Such condensation especially easily occurs on the inner peripheral surface of the film roll core of the easy tubular affected by the temperature of film.To this, if implement plating to the inner peripheral surface of core pipe, then the corrosion stability of this part improves, even if when such as there occurs condensation on the inner peripheral surface of film roll core, also can prevent the corrosion of the inner peripheral surface of film roll core.

In addition, film roll of the present invention comprises above-mentioned film roll core and is wound on the rectangular film on this film roll core.Thereby, it is possible to play the advantage same with the film roll core illustrated.

In this film roll preferably, film is PVA film.PVA film is required higher quality situation about using as the paper in reel for the manufacture of polarizing film is inferior, so not needing to continue limpingly to use there occurs likely to bring in the present invention of film roll core of dysgenic wearing and tearing etc. to the quality of film, be particularly suitable for.

In addition, the manufacture method of film roll of the present invention comprises: above-mentioned film roll core is assembled to the operation on batch up gear; Rotate rectangular winding film to the operation on film roll core with by the film roll core making to be assemblied on batch up gear.Thereby, it is possible to play the advantage same with the film roll core illustrated.

In the manufacture method of this film roll preferably, film is PVA film.PVA film is required higher quality situation about using as the paper in reel for the manufacture of polarizing film is inferior, so not needing to continue limpingly to use there occurs likely to bring in the present invention of film roll core of dysgenic wearing and tearing etc. to the quality of film, be particularly suitable for.

In order to solve above-mentioned 3rd problem, film roll core of the present invention is the film roll core of the core pipe of the tubular comprising coiled film, have the engagement section for limiting the relative rotation relative to holding member at both ends, described holding member is for keeping film roll core.

Even if this film roll core is when the weight of film roll increases further, when film roll core is assembled on batch up gear or when film roll is assembled on expanding unit etc., the engagement section of this film roll core also can engage with the corresponding engagement section being arranged on the holding member side that batch up gear or expanding unit etc. have, limit the relative rotation of film roll core relative to this holding member, film roll core can be made to rotate together with holding member, or can prevent the accident of film roll core from rotating.

Above-mentioned engagement section preferably concavity.Thereby, it is possible to suppress the engagement section when carrying this film roll core or use the film roll of film roll core to be damaged.

Preferably, this film roll core also comprises the key member forming above-mentioned engagement section.Such as, thus, when making engagement section there occurs wearing and tearing etc. because repeatedly using, by making the old key member that there occurs wearing and tearing etc. depart from from core pipe, the key member that the installation in generation is new, can recycle core pipe.

This film roll with core preferably, plating is implemented to the inner peripheral surface of core pipe.Cold place etc. in the winter time, when being transported into air-conditioned processing factory by never air-conditioned for film roll site of storage, condenses on the surface of film roll sometimes.Particularly, recently because the weight of film roll as already described increases, so result from the increase of heat absorption capacity of film roll and the decline of the temperature changing speed of film roll entirety adjoint with it, more easily condense.Such condensation especially easily occurs on the inner peripheral surface of the film roll core of the easy tubular affected by the temperature of film.To this, if implement plating to the inner peripheral surface of core pipe, then the corrosion stability of this part improves, even if when such as there occurs condensation on the inner peripheral surface of film roll core, also can prevent the corrosion of the inner peripheral surface of film roll core.

This film roll with core preferably, core Guan Qi both ends have the edge member of the tubular that can install removably.If used repeatedly in the mode at the both ends keeping film roll core, then easily to wear and tear at these both ends, damage, distortion etc., by making formation as above, the old edge member that there occurs wearing and tearing etc. is departed from from the parts beyond the edge member of formation core pipe, the edge member that the installation in generation is new, can by the parts recycling beyond edge member.

In this film roll preferably, film is PVA film.PVA film is required higher quality, so be particularly suitable in the present invention of winding and expansion etc. that stably can carry out film situation about using as the paper in reel for the manufacture of polarizing film is inferior.

In addition, the manufacture method of film roll of the present invention comprises: above-mentioned film roll core is assembled to the operation on batch up gear; Rotate rectangular winding film to the operation on film roll core with by the film roll core making to be assemblied on batch up gear, in assembly process, the engagement section that film roll core is had engages with the engagement section be formed on holding member that batch up gear has as the engagement section corresponding with it.Thereby, it is possible to play the advantage same with the film roll core illustrated.

In the manufacture method of this film roll preferably, film is PVA film.PVA film is required higher quality, so can stably carry out being particularly suitable in the present invention of the winding of film situation about using as the paper in reel for the manufacture of polarizing film is inferior.

In addition, in order to solve above-mentioned problem, the batch up gear of film of the present invention is the batch up gear of the film of the film roll core of the core pipe that can assemble the tubular comprising coiled film, comprise the holding member that can rotate for keeping film roll core, holding member has the corresponding engagement section that can engage with the engagement section be arranged on film roll core, is used for limiting the relative rotation of film roll core relative to holding member.Thereby, it is possible to play the advantage same with the film roll core illustrated.

Preferably, a pair opposed holding member is comprised at the batch up gear of this film.Thus, the bar-like member of the such problem not using easy generation to illustrate, just film roll core stably can be assembled on the holding member of batch up gear to keep the mode at its both ends, by the rotation of this holding member, film can be wound up on film roll core swimmingly.

In the batch up gear of this film preferably, film is PVA film.PVA film is required higher quality, so can stably carry out being particularly suitable in the present invention of the winding of film situation about using as the paper in reel for the manufacture of polarizing film is inferior.

As described above, film roll core of the present invention has the internal diameter thinner wall section larger than both ends by core pipe at axial central portion, both ends are made to have enough intensity, can keep with both ends, disposal is good, and achieve lightweight and cost degradation, even and if on the inner peripheral surface of film roll core, there occurs condensation, also not easily flow out to outside.In addition, by using such film roll core, make the film roll of the present invention property disposed good, light weight and low cost, be not vulnerable to the impact condensed.And then the manufacture method of film roll of the present invention can carry out manufacture that the is smooth and easy and film roll of low cost.

In addition, film roll core of the present invention has the edge member of the tubular that can install removably by core Guan Qi both ends, even if when making to there occurs wearing and tearing etc. on film roll core, also can by there occurs wearing and tearing etc. old edge member beyond parts recycling, and do not need again to manufacture film roll core entirety from beginning.In addition, in the manufacture method of film roll of the present invention and film roll, also advantage similar to the above can be played.

And then, film roll core of the present invention is by having the engagement section for limiting the relative rotation relative to holding member at both ends, wherein said holding member is for keeping film roll core, what make to have at batch up gear and expanding unit etc. not easily occurs between the holding member of film roll core and film roll core for keeping, and stably can carry out the winding and expansion etc. of film.In addition, in the manufacture method of film roll of the present invention, film roll and the batch up gear of film, also advantage similar to the above can be played.

Accompanying drawing explanation

Fig. 1 is the schematic side elevation of the film roll core of the first embodiment of the present invention.

Fig. 2 is the A of Fig. 1 ₁-A ₂alignment looks cutaway view (schematic cross sectional views).

Fig. 3 is the instruction diagram of the wall components (insert portion) of the core pipe of the film roll core of Fig. 1, and Fig. 3 (a) is schematic side elevation, and Fig. 3 (b) is the B of Fig. 3 (a) ₁-B ₂alignment looks cutaway view (schematic cross sectional views).

Fig. 4 is the instruction diagram of the key member of the film roll core of Fig. 1, and Fig. 4 (a) is schematic side elevation, and Fig. 4 (b) is the C of Fig. 4 (a) ₁-C ₂alignment looks cutaway view (schematic cross sectional views).

Fig. 5 is (with the A of Fig. 1 for illustration of the schematic cross sectional views of the relation of the film roll core of Fig. 1 and the holding member of batch up gear ₁-A ₃the schematic cross sectional views at the position that line is corresponding).

Fig. 6 is the schematic side elevation of the film roll core of the second embodiment of the present invention.

Fig. 7 is the D of Fig. 6 ₁-D ₂alignment looks cutaway view (schematic cross sectional views).

Fig. 8 is the instruction diagram of the edge member of the core pipe of the film roll core of Fig. 6, and Fig. 8 (a) is schematic side elevation, and Fig. 8 (b) is the E of Fig. 8 (a) ₁-E ₂alignment looks cutaway view (schematic cross sectional views).

Fig. 9 is the instruction diagram of the insert portion of the core pipe of the film roll core of Fig. 6, and Fig. 9 (a) is schematic side elevation, and Fig. 9 (b) is the F of Fig. 9 (a) ₁-F ₂alignment looks cutaway view (schematic cross sectional views).

Figure 10 is the instruction diagram of the key member of the film roll core of Fig. 6, and Figure 10 (a) is schematic side elevation, and Figure 10 (b) is the G of Figure 10 (a) ₁-G ₂alignment looks end view drawing (schematic cross sectional views).

Figure 11 is (with the D of Fig. 6 for illustration of the schematic cross sectional views of the relation of the film roll core of Fig. 6 and the holding member of batch up gear ₁-D ₃the schematic cross sectional views at the position that line is corresponding).

Detailed description of the invention

Below, suitably reference accompanying drawing is while illustrate detailed description of the invention, describe the present invention in detail, but the present invention is not limited to these embodiments.

［ the first embodiment ］

First, below referring to figs. 1 through Fig. 5, while to film roll below the core 1(of the first embodiment of the present invention sometimes referred to as core 1) be described.

< core 1>

Core 1 shown in Fig. 1 and Fig. 2 comprises cylindric core pipe 10 and is attached to the key member 70 of each a pair of each end at both ends of this core pipe 10.

(core pipe 10)

As depicted in figs. 1 and 2, core pipe 10 is included in the tube body 11 of the cylindrical shape of coiled film on outer peripheral face and cylindric wall components, this wall components is disposed in the both ends of this tube body 11, and forms the boundary wall 16 adjacent with the two ends of the inner peripheral surface of thinner wall section 10a described later.In core 1, wall components embeds the insert portion 15 be arranged in tube body 11, and tube body 11 and insert portion 15 are disposed in concentric shafts.This core pipe 10 owing to having tube body 11 as above and insert portion 15, so there is the part that the internal diameter thinner wall section 10a(larger than both ends be only made up of tube body 11 at axial central portion).In addition, in the following description, sometimes part less than thinner wall section 10a for the internal diameter being positioned at the both end sides of thinner wall section 10a is called heavy section 10b.In core 1, this heavy section 10b is the position that tube body 11 and insert portion 15 form stepped construction, and tube body 11 forms the outer position of heavy section 10b, and insert portion 15 forms the internal layer position of heavy section 10b.The external diameter of tube body 11 is axially roughly arranged with footpath, and therefore, the heavy section 10b of core pipe 10 and the outer peripheral face of thinner wall section 10a are formed as roughly coplanar.

Here, the external diameter (external diameter of tube body 11) of core pipe 10 is not particularly limited, but can be such as about 30cm.External diameter preferably more than the 10cm of this core pipe 10, more preferably more than 20cm, further preferably more than 25cm.Be in above-mentioned scope by the external diameter of core pipe 10, more effectively can suppress the flexure of core 1, and the winding of film also becomes easy.In addition, the upper limit of the external diameter of core pipe 10 is not particularly limited, if but core pipe 10 maximizes, there is weight increase or become difficult trend, so the external diameter of core pipe 10 preferably below 50cm, more preferably below 35cm to the assembling of batch up gear or expanding unit.

The axial length of above-mentioned core pipe 10 can be such as about 5m.In addition, the axial length of this core pipe 10 suitably can set according to the width of reeled film, core pipe 10 is suitable for using the length of the width long following amount further than film: in the scope of preferably more than 0.1cm below 40cm, in the scope of more preferably more than 0.5cm below 35cm, in the scope of further preferably more than 1cm below 30cm.Here, in view of the present situation of film requiring wider width, axial length preferably more than the 3m of above-mentioned core pipe 10, more preferably more than 4m, further preferably more than 5m, particularly preferably be more than 5.3m.In addition, if the axial length of above-mentioned core pipe 10 is long, then special batch up gear or expanding unit is sometimes needed, so preferably below 8m, more preferably below 7m, further preferably below 6m.

Tube body 11 has the bearing surface 12 abutted with the front end face of insert portion 15 (face of the axial central portion side of core pipe 10), and the bearing surface 12 of this tube body 11 and the front end face of insert portion 15 are arranged in the face substantially vertical relative to the axle center of core pipe 10.Specifically, tube body 11 is formed with roughly the same thickness in the axial direction, but both ends (the outer position of heavy section 10b) is formed slightly thinner than central portion.That is, the stage portion apart from two end axles to certain distance is formed respectively in the inner circumferential side of tube body 11.Further, by being assembled in the stage portion of this tube body 11 by above-mentioned insert portion 15, the bearing surface 12 of tube body 11 and the front end face of insert portion 15 are abutted in the face substantially vertical relative to the axle center of core pipe 10.Abutted in the face substantially vertical relative to the axle center of core pipe 10 by the front end face of this bearing surface 12 and insert portion 15, insert portion 15 can be fixed more reliably.

In addition, the axial length of the stage portion of above-mentioned tube body 11 is formed as roughly the same with the axial length of insert portion 15.Therefore, the two ends of core pipe 10 respective on, the face of the both end sides of the outer face 17(core pipe 10 of tube body 11) and the face of both end sides of outer face 18(core pipe 10 of insert portion 15) be formed as roughly coplanar.The stage portion of this tube body 11 and the axial length of insert portion 15 can be such as about 25cm, their axial length preferably more than 10cm below 50cm, more preferably more than 20cm below 30cm.Being more than above-mentioned lower limit by their axial length, making it possible to the intensity improving the core 1 when being assembled on batch up gear 100 further, on the other hand, by being below the above-mentioned upper limit, making to become more light weight and the core 1 of low cost.

And then the front end face entirety of above-mentioned insert portion 15 is formed as roughly coplanar, and the wall thickness of insert portion 15 is formed thicker than the degree of depth (radial width) of the stage portion of above-mentioned tube body 11.Therefore, utilize the part of the front end face of the insert portion 15 given prominence to towards axle center from the stage portion of tube body 11, make the inner peripheral surface circumference along core pipe 10 form the boundary wall 16 adjacent with the two ends of the inner peripheral surface of thinner wall section 10a.In addition, the front end face of this boundary wall 16(insert portion 15) in the circumferential continuously and be formed in the face substantially vertical relative to axle center.Even if under boundary wall in the circumferential discontinuous situation, at axial central portion, there is thinner wall section by core pipe, also the intensity at the both ends of film roll core can be made to improve, or realize lightweight and the cost degradation of film roll core, in addition, by suitably manage film roll core towards, can suppress because of condensation produce water flow out from the interior of film roll core.But, with regard to boundary wall 16 in the circumferential continuous print core 1, the intensity at both ends can be improved further, lightweight and cost degradation can be realized more fully, and then, even if especially manage core 1 towards, also can suppress because of condensation produce water flow out from the interior of core 1.In addition, be formed in the face substantially vertical relative to axle center by boundary wall 16, can more effectively suppress the water produced because of condensation to flow out from the interior of core 1.

Tube body 11 can be set to thickness about 1.5cm, internal diameter about 27cm, external diameter about 30cm at axial central portion (thinner wall section 10a).In addition, tube body 11 can be set to thickness about 1cm, internal diameter about 28cm at both ends (the outer position of heavy section 10b).Thus, the degree of depth (radial width) of the stage portion of tube body 11 can be about 0.5cm.On the other hand, insert portion 15 can be set to thickness (radial width) about 3cm, internal diameter about 22cm, external diameter about 28cm.Thus, the thickness (thickness at the both ends of tube body 11 and the thickness sum of insert portion 15) of the heavy section 10b of core pipe 10 can be about 4cm.In addition, the height (radial width) of above-mentioned boundary wall 16 can be about 2.5cm.

Here, thickness (thickness of the axial central portion of tube body 11) preferably more than 0.5cm below 3cm, more preferably more than 1cm below the 2cm of thinner wall section 10a.Be more than above-mentioned lower limit by the thickness of this thinner wall section 10a, the intensity of the axial central portion of core pipe 10 is improved.On the other hand, be below the above-mentioned upper limit by the thickness of thinner wall section 10a, make to become more light weight and the core 1 of low cost.

More than 1.5 times less than 5 times of thickness of the thickness of above-mentioned heavy section 10b preferably above-mentioned thinner wall section 10a, more preferably more than 2 times less than 4 times, further preferably more than 2.5 times less than 3.5 times.Be more than above-mentioned lower limit by the thickness of heavy section 10b, the intensity at the both ends of core 1 is improved.On the other hand, be below the above-mentioned upper limit by the thickness of heavy section 10b, make to become more light weight and the core 1 of low cost.Concrete thickness preferably more than 2cm below the 8cm of heavy section 10b, more preferably more than 2.5cm below 6cm, further preferably more than 3cm below 5cm.

More than 0.1 times less than 0.6 times of thickness of the degree of depth of the stage portion of above-mentioned tube body 11 preferably thinner wall section 10a, more preferably more than 0.25 times less than 0.45 times, further preferably more than 0.3 times less than 0.43 times.Are more than above-mentioned lower limits by the degree of depth of the stage portion of tube body 11, insert portion 15 can be fixed more reliably.On the other hand, are below above-mentioned upper limits by the degree of depth of the stage portion of tube body 11, can more effectively prevent the embedding because of insert portion 15 from distortion or the damage at the both ends of the tube body 11 caused being installed.The degree of depth preferably more than 0.1cm below the 0.8cm of the stage portion of tube body 11, more preferably more than 0.3cm below 0.5cm.

In core 1, core pipe 10 is metal, and above-mentioned tube body 11 and insert portion 15 are all metal.In the present invention, core pipe also can be formed by the material beyond the metals such as carbonfiber reinforced plastics, but if metal, then can improve intensity and the processability of core pipe as already described further.Here, as metal, the steel such as iron, carbon steel, corrosion-resistant steel can be adopted; The aluminium such as aluminium, aluminum alloy metalloid etc., but preferably there is enough intensity and be easily shaped and the carbon steel of low cost.

In core 1, it is roughly the same with the external diameter of insert portion 15 that the stage portion of above-mentioned tube body 11 is formed as internal diameter, and insert portion 15 is pressed into the stage portion of tube body 11() in.By this press-in, insert portion 15 and tube body 11 can be fixed more reliably.Here, insert portion 15 can be undertaken by shrink fit or contraction fit to the press-in of tube body 11.In addition, in the present invention, insert portion both can have been embedded by connect mechanisms such as bolts and be installed on tube body, also can embed installation by welding.

Tube body 11 and insert portion 15 can be all made up of identical material, but such as also can be made up of the material higher than the strength of material forming tube body 11 by insert portion 15, are made up of different materials.Such as by the tube body 11 machinery carbon structural steels pipe manufacturer such as STKM13A, insert portion 15 can be manufactured by S25C, S35C or the S45C in machinery carbon structural steels.

In core 1, hard chromium plating is implemented to the outer peripheral face (outer peripheral face of tube body 11) of above-mentioned core pipe 10, and then carries out polishing.This chromed hardened coating (omitting diagram) such as can make mean thickness be about 40 μm, this mean thickness preferably more than 1 μm less than 200 μm, more preferably more than 10 μm less than 50 μm.

Preferably, the roughness of surface of the outer peripheral face of core pipe 10 is adjusted by above-mentioned Hard Chromium Coating and polishing etc.Specifically, the roughness of surface (Ra) of the outer peripheral face of core pipe 10 preferably less than 5 μm, more preferably more than 0.1 μm less than 3 μm, further preferably more than 0.3 μm less than 2 μm.Be in above-mentioned scope by the roughness of surface (Ra) of the outer peripheral face of core pipe 10, can carry out more swimmingly by winding film to film roll core time winding start operation.

In addition, process for electroless nickel plating is implemented to the inner peripheral surface of the thinner wall section 10a of above-mentioned core pipe 10.This process for electroless nickel plating does not make electricity consumption and implements nickel plating by chemical reaction.The platings such as process for electroless nickel plating are implemented by the inner peripheral surface of the thinner wall section to core pipe, make as already described, the corrosion stability of plating portion improves, even if when the water such as produced because of the condensation occurred on the inner peripheral surface of film roll core accumulates on the inner peripheral surface of thinner wall section, the corrosion of the inner peripheral surface of film roll core also can be prevented.In addition, from the above point of view preferably, except the inner peripheral surface of the thinner wall section of core pipe, still plating is implemented to the one party in the inner peripheral surface of above-mentioned boundary wall and heavy section or both.

The inner peripheral surface of above-mentioned insert portion 15 is provided with the engaging projection 20 projecting towards inner side.This engaging projection 20 can engage with the recess 114 in the holding member 105 of batch up gear 100 described later.

In core 1, at the both ends of above-mentioned core pipe 10, by the groove portion 30 that is formed in the both ends of the surface of this core pipe 10 with each end is respectively attached to the key member described later 70 of a pair, form the engagement section 71 of the concavity for limiting the relative rotation relative to holding member 105, holding member 105 is for holding core 1.Specifically, first, the both ends of the surface of above-mentioned core pipe 10 are carved the groove portion 30 established for fitted key parts 70.This groove portion 30 is circumferentially formed on the outer face 18 of insert portion 15 as Suo Shi Fig. 3 (a) centered by axle center, and this groove portion 30 is made up of all grooves throughout complete cycle.And, be installed in above-mentioned groove portion 30 by key member 70 is loaded in a pair mutually opposing mode each on each end as shown in Figure 1, make to be separated by key member 70 throughout the groove portion 30 of complete cycle, the part that be not loaded into fitting key parts 70 of result in groove portion 30 is formed in the engagement section 71 of the concavity of the both ends of the surface opening of core pipe 10.In addition, the degree of depth in groove portion 30 can be such as more than 1cm below 3cm.In addition, the width in groove portion 30 (radial length) if consider intensity etc., then more than 0.3 times less than 0.8 times of thickness of preferably insert portion 15, more preferably more than 0.5 times less than 0.7 times.

In addition, as shown in Figures 2 and 3, insert portion 15 is formed the fixing internal thread hole 35 of key member for fixing above-mentioned key member 70, and this key member fixes the bottom being formed in above-mentioned groove portion 30 with internal thread hole 35.This key member is fixing to be formed multiple (being 3 in illustrated example) relative to each key member 70 with internal thread hole 35.The plurality of key member is fixing to be arranged with roughly equal angle intervals relative to axle center with internal thread hole 35, such as, arrange with 15 ° of intervals.

The above-mentioned engagement section 71 that core 1 has is by engaging with the engagement section corresponding to above-mentioned engagement section 71 being arranged on the holding member side that batch up gear, expanding unit, film roll feedway etc. have, limit the relative rotation of core 1 relative to this holding member, core 1 can be made to rotate together with holding member, or can prevent the accident of core 1 from rotating.In core 1, because engagement section 71 is concavities, so the engagement section corresponding with it preferably convex, but the engagement section that film roll core of the present invention has does not need must be concavity, such as when this engagement section is convex, the engagement section corresponding with it preferably concavity.In addition, corresponding engagement section also can have the shape of the engagement section complementation had for film roll core, but also can be the shape that the part of the shape of the engagement section only had with film roll core engages.In addition, in core 1, each end is formed with each two engagement sections 71, as long as but holding member has corresponding engagement section to engage with at least one party that such film roll core respectively has in multiple engagement sections in each end.

If be described for the situation that core 1 is assembled in batch up gear 100, then as shown in Figure 5, the above-mentioned engagement section 71 that core 1 has engages with the engagement section 111 corresponding to the convex of above-mentioned engagement section 71 being arranged on opposed holding member 105 side that can rotate for a pair that batch up gear 100 has.Here, each holding member 105 is respectively arranged with an engagement section 111.Further, by this engaging, limit the relative rotation of core 1 relative to holding member 105, thus the rotary power of holding member 105 is reliably passed to core 1.

(key member 70)

In core 1, key member 70 is formed as side-looking radiused shape as shown in Fig. 1 and Fig. 4 (a).As shown in Figure 4, in key member 70, be formed with the fixing through hole 72 of key member with the position that internal thread hole 35 is corresponding fixing with above-mentioned key member.And, by inserting the external thread part of the connect mechanisms such as bolt (omitting diagram) as shown in Figure 2 and being screwed in key member fixing use internal thread hole 35, and become and connect to insert portion 15 side pressure by key member 70 by the head of connect mechanism (bolt etc.), thus key member 70 can be fixed to removably the both ends (end face side) of core pipe 10.In key member 70, be formed with groove 73 in the side of the both end sides of core pipe 10, the head of connect mechanism (bolt etc.) is externally given prominence to unlike the both ends of the surface of core 1.The degree of depth of groove 73 can be such as more than 0.5cm below 2.5cm.In addition, more than 0.5 times less than 0.9 times of width in the width of groove 73 (radial length) preferably groove portion 30, more preferably more than 0.65 times less than 0.8 times.

Key member 70 is preferably metal, this metal preferably carbon steel.Specifically, key member 70 can be manufactured by machinery carbon structural steels (such as S55C).In addition, preferably, nitrogen-hardening process is implemented to this key member 70, specifically preferably implement salt bath carbonitriding process (tufftridy process).In addition, the circumferential lengths of this key member 70 can be such as more than 0.05 times less than 0.3 times of the length in groove portion 30.

(film)

The film reeled to core 1 is not particularly limited, the resin film of PVA film, mylar, polyamide film, cellulose ester film, norbornene resin film etc. can be enumerated, but when require high quality as the paper in reel for the manufacture of polarizing film etc. and the impact come by water-band also larger PVA film, play effect of the present invention more significantly.As this PVA, all or part of that such as can use the ester group by the vinyl acetate such as vinyl acetate being polymerized the polyvinyl ester obtained is converted to hydroxyl and the material manufactured.

This film is in order to make film roll and preferably rectangular film, as its length, such as preferred in the scope of more than 50m below 40000m, preferred in the scope of more than 100m below 30000m.Special in the length of film is more than 8000m and the quality of film roll is larger, play effect of the present invention more significantly.

The width of film can be set as following value shorter in the axial length of core pipe 10: preferably in the scope of more than 0.1cm below 40cm, more preferably in the scope of more than 0.5cm below 35cm, preferred in the scope of more than 1cm below 30cm further, specifically, the width of film can be such as 4.8m.

As the thickness of film, although also depend on the material and purposes etc. of film, preferably more than 10 μm less than 150 μm, more preferably more than 15 μm less than 120 μm, further preferably more than 20 μm less than 80 μm.

< film roll >

The rectangular film that film roll of the present invention comprises above-mentioned core 1 and is wound on this core 1.As the film that this is rectangular, the rectangular film in above-mentioned film (PVA film etc.) can be used.

The manufacture method > of < film roll

Next, the manufacture method of the film roll using above-mentioned core 1 is described.

The manufacture method of this film roll comprises and above-mentioned core 1 is assembled to assembly process on batch up gear 100 and by making this core 1 be assemblied on this batch up gear 100 rotate rectangular winding film to the rolling step on this core 1.In above-mentioned assembly process, when the engagement section 71 making core 1 have engages with the engagement section 111 be formed on holding member 105 that above-mentioned batch up gear 100 has as the engagement section 111 corresponding with it, limit the relative rotation of core 1 relative to this holding member 105, core 1 can be made to rotate together with holding member 105, or can prevent the accident of core 1 from rotating.By this core 1 being departed from from batch up gear 100 after this rolling step terminates, can with object accordingly handle thin films roll up.

The batch up gear 100 used in above-mentioned assembly process have opposed and can close/away from the holding member 105 that can rotate for a pair.This pair holding member 105 mutually can be arranged rotatably to equidirectional on coaxial.This holding member 105 has and can insert the chuck portion 110 of extracting from the inward at both ends side of core 1.This chuck portion 110 has can the claw 113 of expanding in S. A. radial direction/undergauge.Can be set in addition, this claw 113 expanding/action of undergauge can be undertaken by air.In addition, this claw 113 has recess 114 at lateral circle surface (face of S. A. radial direction), is placed through rear flank in both ends claw 113 being inserted into core 1 expanding, and recess 114 is engaged with the engaging projection 20 of the inner peripheral surface of core pipe 10.And then this claw 113 has the elasticity position 115 abutted with the inner peripheral surface of core pipe 10 at lateral circle surface, this elasticity position 115 is attached to the position leaning on end side (batch up gear 100 main body side) than above-mentioned recess 114, is made up of rubber elastomeric material.In addition, this holding member 105 has the end face opposed with the end face of core pipe 10, has the engagement section 111 corresponding with above-mentioned engagement section 71 from the end face of this holding member 105 is projecting.

And, in above-mentioned assembly process, core 1 is arranged between a pair holding member 105 of released state, then make a pair holding member 105 close, chuck portion 110 is inserted from the inward at both ends side of core 1, on the other hand, the engagement section 71 that core 1 is had engages with the engagement section 111 corresponding with it be formed on holding member 105, then by making claw 113 expanding, the recess 114 in chuck portion 110 is engaged by projection 20 with engaging, thus, by the both ends of a pair holding member 105 holding core 1, core 1 is assembled on batch up gear 100.

In above-mentioned rolling step, by making the core 1 be assemblied on batch up gear 100 rotate, by rectangular winding film on core 1.The rotation of core 1 can be rotated by the holding member 105 making batch up gear 100 have to be carried out.Particularly, if the engagement section 71 that core 1 has engages with corresponding engagement section 111, then core 1 is limited relative to the relative rotation of holding member 105, and the rotary power of holding member 105 reliably passes to core 1.As the film that this is rectangular, the rectangular film in above-mentioned film (PVA film etc.) can be used.

After rolling step terminates, the recess 114 of claw 113 is removed with the fastening state engaged by projection 20 by claw 113 undergauge, then makes a pair holding member 105 leave, this film roll can be departed from from batch up gear 100 thus.

［ the second embodiment ］

Then, below with reference to Fig. 6 to Figure 11, while to film roll below the core 2(of the second embodiment of the present invention sometimes referred to as core 2) be described.In addition, when the core 2 of explanation second embodiment, also the description thereof will be omitted sometimes to use identical Reference numeral for the parts, position etc. with the formation same with the first embodiment and/or function.

< core 2>

Core 2 shown in Fig. 6 and Fig. 7 comprises cylindric core pipe 10 and is attached to the key member 70 of each a pair of each end on the both ends of this core pipe 10.

The core pipe 10 of core 2 is also same with core 1, comprise tube body 11 and cylindric wall components, this wall components is disposed in the both ends of this tube body 11, and forming the boundary wall 16 adjacent with the two ends of the inner peripheral surface of thinner wall section 10a, this wall components embeds the insert portion 15 in the stage portion being installed to tube body 11.In core 2, as shown in Figure 7, be equipped with the edge member 50 of the cylindrical shape that can install removably in the outer side (the outer side of tube body 11) of insert portion 15, thus, core pipe 10 has the edge member 50 of the tubular that can install removably at its both ends.

In this core 2, the position that heavy section 10b is formed residing for the position of stepped construction and edge member 50 by tube body 11 and insert portion 15 is formed, the position of stepped construction is formed at tube body 11 and insert portion 15, tube body 11 forms the outer position of heavy section 10b, and insert portion 15 forms the internal layer position of heavy section 10b.In core 2, be also formed with the stage portion apart from two end axles to certain distance amount respectively in the inner circumferential side of tube body 11.Further, the axial length of the stage portion of this tube body 11 is formed as roughly the same with the axial length of insert portion 15 (length on outer peripheral face).Therefore, the face of the both end sides of the outer face 17(core pipe 10 of tube body 11) and the face of both end sides of outer face 18(core pipe 10 of insert portion 15) part beyond otch 15a described later is formed as roughly coplanar.

Core pipe can be external diameter and internal diameter is the structure (roughly install with the two ends of the parts of the cylindrical shape in footpath in the axial direction respectively at external diameter and internal diameter and have with it roughly with the structure etc. of the edge member of the external diameter in footpath and the cylindrical shape of internal diameter) roughly with the cylindrical shape in footpath respectively in the axial direction, if but core pipe has the internal diameter thinner wall section larger than both ends at axial central portion as described above, then both ends have enough intensity, even if when the weight of the longer situation of the axial length of film roll core or film roll increases further, also can with on keep the mode at its both ends to be stably the assembled to holding member that can rotate that batch up gear or expanding unit etc. have, by the rotation of this holding member, can launch on winding film to film roll core or by film from film roll.In addition, because this film roll core has thinner wall section at the axial central portion of core pipe, so lightweight and cost degradation can be realized.And then, this film roll core is larger than both ends because the axial central portion (thinner wall section) of core pipe is set to internal diameter, even if so condense on the inner peripheral surface of film roll core, the inner peripheral surface that consequent water also accumulates in thinner wall section not easily externally flows out.Therefore, the Quality Down of the film on this film roll core is not easily wound on.

In addition, as mentioned above, if core pipe has the tube body of tubular and is disposed in the both ends of this tube body and forms the wall components of the boundary wall adjacent with the two ends of the inner peripheral surface of thinner wall section, then can easily and reliably form the internal diameter thinner wall section larger than two ends at the axial central portion of core pipe.

And then if wall components embeds the insert portion be installed in tube body as mentioned above, then the stationary state of tube body and wall components (insert portion) becomes more reliable.

As shown in Fig. 6, Fig. 7 and Figure 10, same in core 2, at the both ends of core pipe 10, by being formed in the groove portion 30 of the both ends of the surface of this core pipe 10 and each end being respectively attached to the key member 70 of a pair, form the engagement section 71 of concavity for limiting the relative rotation relative to the holding member for holding core 2, but this groove portion 30 be not outer face 18 at insert portion 15 but in the face of the both end sides of the outer face 19(core pipe 10 of edge member 50) on circumferentially formed centered by axle center.And, by inserting the external thread part of the connect mechanisms such as bolt (omitting diagram) as shown in Figure 7 and being screwed in key member fixing use internal thread hole 35, by the head of connect mechanism (bolt etc.), key member 70 is connect to edge member 50 side pressure, key member 70 can be fixed to removably the both ends (end face side) of core pipe 10.

Edge member 50 is disposed in on tube body 11 and the concentric axle of insert portion 15.In addition, the internal diameter of edge member 50 is set to roughly the same with the internal diameter of insert portion 15, and therefore, the inner peripheral surface of edge member 50 and insert portion 15 is formed as roughly coplanar.Equally, the external diameter of edge member 50 is set to roughly the same with the external diameter of tube body 11, and therefore, the outer peripheral face of edge member 50 and tube body 11 is formed as roughly coplanar.That is, the heavy section 10b of core pipe 10 and the outer peripheral face of thinner wall section 10a are formed as roughly coplanar.

The axial length (length except except tubular projection 51 part described later) of edge member 50 can be such as about 5cm, this length preferably more than 3cm below 15cm, more preferably more than 4cm below 10cm.Being more than above-mentioned lower limit by this length, making can obtain the sufficient degree of depth in groove portion 30 described later, on the other hand, by being below the above-mentioned upper limit, material unaccounted-for (MUF) when changing edge member 50 can be reduced.

In core 2, the axial length (length on outer peripheral face) of insert portion 15 can be such as about 24cm.In addition, because edge member 50 can become heavy section 10b, so the axial length sum of the axial length of insert portion 15 and edge member 50 (axial length of heavy section 10b) is preferably in the suitable scope of the axial length about insert portion 15 above-mentioned in the explanation of core 1.That is, above-mentioned and preferably more than 10cm below 50cm, more preferably more than 20cm below 30cm.By this be more than above-mentioned lower limit, the intensity of the core 2 when being assembled on batch up gear 100 can being improved further, on the other hand, by being below the above-mentioned upper limit, making to become more light weight and the core 2 of low cost.

In addition, on the insert portion 15 of core 2, as shown in figures 7 and 9, otch 15a is formed with in inner circumferential side from outer face 18 towards front end face.This otch 15a is circumferentially formed in the inner circumferential side of insert portion 15.On the other hand, as shown in Figure 7 and Figure 8, be formed in above-mentioned edge member 50 side from the outstanding tubular projection 51 of inner end surface (face of the axial central portion side of core pipe 10), this tubular projection 51 is chimeric with otch 15a.

The axial length of the axial length of tubular projection 51 and the otch 15a of insert portion 15 is set to roughly the same, such as, can be more than 0.5cm below 3cm left and right.In addition, the degree of depth (radial width) of the thickness (radial width) of tubular projection 51 and the otch 15a of insert portion 15 is set to roughly the same, preferably more than 0.1 times less than 0.5 times of thickness of insert portion 15, more preferably more than 0.2 times less than 0.3 times.

On this insert portion 15, as shown in Figure 9, outer face 18 is formed with the fixing internal thread hole 34 of multiple (being 12 in illustrated example) edge member for flange parts 50.The plurality of edge member is fixed and is formed with roughly equal angle intervals (being 30 ° in illustrated example) relative to axle center throughout circumferential universe with internal thread hole 34.In addition, above-mentioned groove portion 30 is formed on the outer face 19 of edge member 50 as already described, as shown in Figure 8, in the bottom in this groove portion 30, be formed with the fixing through hole 31 of edge member and housing recess 32 with the position that internal thread hole 34 is corresponding fixing with the edge member of above-mentioned insert portion 15, housing recess 32 is for receiving the head of the connect mechanisms such as bolt and diameter use fixing than this edge member through hole 31 is large.Therefore, edge member 50 can be arranged on insert portion 15 removably by connect mechanism (bolt etc.).

In addition, as shown in Figure 7 and Figure 8, in the bottom in the groove portion 30 of edge member 50, same with the groove portion 30 of the insert portion 15 of core 1, be formed with the fixing internal thread hole 35 of key member for retainingf key parts 70.In illustrated example, the fixing internal thread hole 35 of two key members is formed with for each key member 70.In addition, the disengaging internal thread hole 33 for making edge member 50 depart from from insert portion 15 is formed with in the bottom in the groove portion 30 of edge member 50.This disengaging internal thread hole 33 is set to, and by being screwed bolt, the leading section of this bolt is abutted with the outer face 18 of insert portion 15, and edge parts 50 exerts a force to off-direction.In addition, this disengaging internal thread hole 33, in the opposed position of the bottom in groove portion 30, is respectively formed with two places to each edge member 50.

In addition, in core 1, the engaging projection 20 engaged with the recess 114 in the holding member 105 of batch up gear 100 is formed on the inner peripheral surface of insert portion 15, but is formed in core 2 on the inner peripheral surface of edge member 50.In addition, this engaging projection also can not be formed on the inner peripheral surface of edge member, and is formed on the inner peripheral surface of insert portion.

In core 2, edge member 50 is metal.Also edge member can be formed by the material beyond the metals such as carbonfiber reinforced plastics, but be metal by edge member 50, intensity and the processability of core pipe can be improved further.As this metal, the steel such as iron, carbon steel, corrosion-resistant steel can be adopted; The aluminium such as aluminium, aluminum alloy metalloid etc., but preferably there is enough intensity and be easily shaped and the carbon steel of low cost.Specifically, edge member 50 can be manufactured by machinery carbon structural steels (such as S55C).In addition, tube body 11, insert portion 15 and edge member 50 can be all made up of identical material, but also can be made up of different materials.Such as by the tube body 11 machinery carbon structural steels pipe manufacturer such as STKM13A, insert portion 15 S25C, S35C or S45C in machinery carbon structural steels can be manufactured, the S55C of edge member 50 in machinery carbon structural steels is manufactured.The inner peripheral surface of preferred edge parts 50 implements nitrogen-hardening process, specifically preferably implements salt bath carbonitriding process (tufftridy process).In addition, the outer peripheral face of edge parts 50 implements hard chromium plating, and then carries out polishing.

In addition, use the film roll of the core 2 of the second embodiment and manufacture method thereof owing to being the formation substantially same with the first embodiment, so omit the description.

［ other embodiments ］

Describe about the first embodiment and the second embodiment above, but the present invention is not limited to this, can suitably design modification within the scope of the intent of the present invention.

That is, in the above-described embodiment, tube body 11 and wall components are comprised to core pipe 10 and wall components is the structure embedding the insert portion 15 be installed in tube body 11 is illustrated, but the present invention might not be defined in this.

Such as, comprise the film roll core (also can have engagement section at both ends) of the core pipe (as concrete example, form thinner wall section by external diameter and internal diameter roughly being cut with the inner peripheral surface of the axial central portion of the parts of the cylindrical shape in footpath in the axial direction respectively and install the core pipe etc. having and roughly obtain with the edge member of the external diameter in footpath and the cylindrical shape of internal diameter with these two ends at its two ends) forming thinner wall section by external diameter and internal diameter roughly being cut with the inner peripheral surface of the axial central portion of the parts of the cylindrical shape in footpath in the axial direction respectively also within the scope of the intent of the present invention.In addition, as already described, be included in external diameter and internal diameter roughly to install with the two ends of the parts of the cylindrical shape in footpath in the axial direction respectively and have with the film roll core (also can have engagement section at both ends) of its core pipe roughly obtained with the edge member of the external diameter in footpath and the cylindrical shape of internal diameter etc. also within the scope of the intent of the present invention.In addition, comprise external diameter and internal diameter respectively in the axial direction roughly with the film roll core (also can have engagement section at both ends) etc. of the core pipe of the cylindrical shape in footpath also within the scope of the intent of the present invention.

In addition, when comprising wall components, being also not limited to wall components is as described above the structure of insert portion 15.Such as, also the film roll core etc. comprising following core pipe can be adopted: distinguish in the axial direction roughly with the two ends of the tube body of the cylindrical shape in footpath at external diameter and internal diameter, the wall components of the affixed cylindrical shape of connect mechanism or the welding etc. such as bolt is utilized to form, about this wall components, external diameter and internal diameter are respectively in the axial direction roughly with footpath and this external diameter is roughly the same with the external diameter of tube body, and this internal diameter is less than the internal diameter of tube body.And then, the two ends (end of the both end sides of film roll core) being included in wall components as above cylindric also can be adopted to install have with this wall components roughly with the core pipe of the edge member of the external diameter in footpath and the cylindrical shape of internal diameter film roll core or be included in the film roll core etc. of the core pipe that external diameter and internal diameter roughly use the wall components of cylindrical shape as above can be installed removably by connect mechanisms such as bolts as edge member with the two ends of the tube body of the cylindrical shape in footpath respectively in the axial direction.

In addition, about the holding member that batch up gear 100 grade has, be also not limited to the structure of above-mentioned embodiment, such as, the shape with the cross section comprised in the plane in axle center also can be used to be the holding member in roughly trapezoidal chuck portion.According to such holding member, also by the front end (gradually thin front end) in chuck portion being inserted into the inner side of film roll core and utilizing a pair this holding member from two ends clamping film roll core, the both ends of film roll core can be kept.

In addition, in this second embodiment, insert portion 15 is formed otch 15a and form tubular projection 51 on edge member 50, but otch to be formed in edge member side and tubular projection to be formed in insert portion side be also can the item of suitable design modification.

description of reference numerals

1,2 film roll cores

10 core pipes

10a thinner wall section

10b heavy section

11 tube bodies

12 bearing surfaces

15 insert portion

15a otch

16 boundary wall

20 engaging projections

30 groove portions

31 edge members fixedly use through hole

32 housing recess

33 disengaging internal thread holes

34 edge members fixedly use internal thread hole

35 key members fixedly use internal thread hole

50 edge members

51 tubular projections

70 key members

71 engagement sections

72 key members fixedly use through hole

100 batch up gears

105 holding members

110 chuck portions

The engagement section of 111 correspondences

113 claws

114 recesses

115 elasticity positions.

Claims

1. a film roll core, comprises the core pipe of the tubular of coiled film, it is characterized in that,

Core pipe has the internal diameter thinner wall section larger than both ends at axial central portion.

2. film roll core as claimed in claim 1, is characterized in that,

Core pipe has tube body and the wall components of tubular, and this wall components is disposed in the both ends of this tube body and forms the boundary wall adjacent with the two ends of the inner peripheral surface of thinner wall section.

3. film roll core as claimed in claim 2, is characterized in that,

Wall components embeds the insert portion be arranged in tube body.

4. the film roll core according to any one of claims 1 to 3, is characterized in that,

Core pipe is metal.

5. film roll core as claimed in claim 4, is characterized in that,

Metal is carbon steel.

6. the film roll core according to any one of Claims 1 to 5, is characterized in that,

Plating is implemented to the inner peripheral surface of thinner wall section.

7. the film roll core according to any one of claim 1 ~ 6, is characterized in that,

Core Guan Qi both ends have the edge member of the tubular that can install removably.

8. the film roll core according to any one of claim 1 ~ 7, is characterized in that,

Have the engagement section for limiting the relative rotation relative to holding member at both ends, described holding member is for keeping film roll core.

9. film roll core as claimed in claim 8, is characterized in that,

Engagement section is concavity.

10. film roll core as claimed in claim 8 or 9, is characterized in that,

Also comprise the key member forming engagement section.

11. 1 kinds of film rolls, is characterized in that, comprising:

Film roll core according to any one of claim 1 ~ 10; With

Be wound on the rectangular film on this film roll core.

12. film rolls as claimed in claim 11, is characterized in that,

Film is polyvinyl alcohol based polymer film.

The manufacture method of 13. 1 kinds of film rolls, is characterized in that, comprising:

Film roll core according to any one of claim 1 ~ 10 is assembled to the operation on batch up gear; With

Rotate rectangular winding film to the operation on film roll core by making the film roll core be assemblied on batch up gear.

The manufacture method of 14. film rolls as claimed in claim 13, is characterized in that,

In assembly process, the opposed holding member that can rotate for a pair had by batch up gear keeps the both ends of film roll core, is assembled on batch up gear by film roll core.

The manufacture method of 15. film rolls as described in claim 13 or 14, is characterized in that,

Film is polyvinyl alcohol based polymer film.

16. 1 kinds of film roll cores, comprise the core pipe of the tubular of coiled film, it is characterized in that,

17. film roll cores as claimed in claim 16, is characterized in that,

Core pipe is metal.

18. film roll cores as claimed in claim 17, is characterized in that,

Metal is carbon steel.

19. film roll cores according to any one of claim 16 ~ 18, is characterized in that,

Plating is implemented to the inner peripheral surface of core pipe.

20. 1 kinds of film rolls, is characterized in that, comprising:

Film roll core according to any one of claim 16 ~ 19; With

Be wound on the rectangular film on this film roll core.

21. film rolls as claimed in claim 20, is characterized in that,

Film is polyvinyl alcohol based polymer film.

The manufacture method of 22. 1 kinds of film rolls, is characterized in that, comprising:

Film roll core according to any one of claim 16 ~ 19 is assembled to the operation on batch up gear; With

The manufacture method of 23. film rolls as claimed in claim 22, is characterized in that,

The manufacture method of 24. film rolls as described in claim 22 or 23, is characterized in that,

Film is polyvinyl alcohol based polymer film.

25. 1 kinds of film roll cores, comprise the core pipe of the tubular of coiled film, it is characterized in that,

26. film roll cores as claimed in claim 25, is characterized in that,

Engagement section is concavity.

27. film roll cores as described in claim 25 or 26, is characterized in that,

Also comprise the key member forming engagement section.

28. film roll cores according to any one of claim 25 ~ 27, is characterized in that,

Core pipe is metal.

29. film roll cores as claimed in claim 28, is characterized in that,

Metal is carbon steel.

30. film roll cores according to any one of claim 25 ~ 29, is characterized in that,

Plating is implemented to the inner peripheral surface of core pipe.

31. film roll cores according to any one of claim 25 ~ 30, is characterized in that,

32. 1 kinds of film rolls, is characterized in that, comprising:

Film roll core according to any one of claim 25 ~ 31; With

Be wound on the rectangular film on this film roll core.

33. film rolls as claimed in claim 32, is characterized in that,

Film is polyvinyl alcohol based polymer film.

The manufacture method of 34. 1 kinds of film rolls, comprising:

Film roll core according to any one of claim 25 ~ 31 is assembled to the operation on batch up gear; With

Rotate rectangular winding film to the operation on film roll core by making the film roll core be assemblied on batch up gear;

It is characterized in that,

In assembly process, the engagement section that film roll core is had engages with the engagement section be formed on holding member that batch up gear has as the engagement section corresponding with it.

The manufacture method of 35. film rolls as claimed in claim 34, is characterized in that,

The manufacture method of 36. film rolls as claimed in claim 35, is characterized in that,

Film is polyvinyl alcohol based polymer film.

The batch up gear of 37. 1 kinds of films, can assemble the film roll core of the core pipe of the tubular comprising coiled film, it is characterized in that,

Comprise the holding member that can rotate for keeping film roll core,

Holding member has the corresponding engagement section that can engage with the engagement section be arranged on film roll core, is used for limiting the relative rotation of film roll core relative to holding member.

The batch up gear of 38. films as claimed in claim 37, is characterized in that,

Batch up gear comprises a pair opposed holding member.

The batch up gear of 39. films as described in claim 37 or 38, is characterized in that,

Film is polyvinyl alcohol based polymer film.