CN101254874A

CN101254874A - Packing film device with fins

Info

Publication number: CN101254874A
Application number: CNA2008100825189A
Authority: CN
Inventors: 梅津正; 秀冈诚
Original assignee: Kureha Corp
Current assignee: Kureha Corp
Priority date: 2007-02-27
Filing date: 2008-02-27
Publication date: 2008-09-03
Anticipated expiration: 2028-02-27
Also published as: HK1125086A1; CN101254874B; KR20080079610A; TW200844009A; CN101254872A; CN101254872B; JP2008239250A

Abstract

The invention provides an improved package film device capable of eliminating 'edge friction' which is caused by the press of a cutting edge on a package film pulled from a container and damages the package film, and of preventing the packaging film from rolling upwards and withdrawing. In the package film device, a cover body is provided with an upper wall (21), a cover front wall (24) and a cutting edge (22) fixedly connected to the cover front wall, the point of the cutting edge is configured such that the point is adjacent to the lower outer surface of a box front wall when the opening of the cover body is closed, a wing (50) with a wing connection part (55) connected to a sub front wall is formed by cutting a part of the box front wall (121), an adhesive layer (14) is arranged on at least a part of the outer surface of the wing (50).

Description

The packing film device of band fin

Technical field

The packaging film that the present invention relates to use in the packing of food and other article furls the packing film device that is contained in the container, can easily packaging film be pulled out outside container.More particularly, the invention provides and can not cut off blade contact on the packaging film of pulling out and with the packing film device of the phenomenon that is called " blade is wiped and bumped " of packaging film damage from container.The invention provides for left hand smoothly the people and the right hand people both sides smoothly improvement that can not produce the inconvenience in the use packing film device.In addition, the present invention relates to possess and be used for making packaging film and ora terminalis (cut-out edge) thereof to leave, make it possible to pinch the ora terminalis of packaging film and the packing film device of fin that packaging film is pulled out outside container with finger from the wall of container face.And then, the invention provides prevent the packaging film that is drawn out ora terminalis by the packing film device that on volume, retracts.

Background technology

In the past, knownly have the packaging film that will be used for the packing of food or other article to furl to be contained in the container, when the use of packaging film by staff will both quantitative packaging film outside container, pull out, by being located at that cut-out blade on the container cuts off and the packing film device that can use.Patent documentation 1 discloses the film for packaging container of the container cap 12 on the rear surface portion apical margin that possesses the container body 11 of taking in the web-like packaging film and be rotatably connected to container body.The film for packaging container of patent documentation 1 possesses protrusion tab 15 and strippable lining cement (スト Star パ one ニス) 19 on the front surface wall portion of container.

[patent documentation 1] TOHKEMY 2005-178901 communique

In packing film device in the past, packaging film furled be contained in the container, when the use of packaging film, packaging film is pulled out set length outside container with staff, cut off and can use by being located at cut-out blade on the container.When packaging film volume is pulled out outside container, have cut off blade be crushed on the packaging film of pulling out from container, with the problem of so-called " blade is wiped and bumped " of the packaging film damage of pulling out.That is,, " blade is wiped and bumped " produce the undesirable condition that packaging film part that packaging film is cut off, pulled out from container is rolled up to rollback owing to taking place.The 1st purpose of the present invention provides a kind of packing film device of eliminating " blade is wiped and bumped ".

In addition, in packing film device in the past, if packaging film and cut-out edge thereof then are difficult to pinch by staff the cut-out edge of packaging film attached on the container outer wall, in order to address this problem, equipped the fin that the part at the cut-out edge that is used for making packaging film is left from container outer wall.But, have be not for the right hand smoothly the people and left hand people both sides smoothly all easily the structure shortcoming.Promptly, fin in the past is in order conveniently to be configured to right hand people smoothly, fin is positioned at the length direction central authorities position far away of container with respect to the user, when pulling out so that pinch packaging film holding container with left hand with smoothly the right hand, the wide portions of the packaging film that is drawn out is in and grips between part and the user.If like this configuration, then leftward under smoothly people's the situation, fin is in the position nearer with respect to the user, has produced the problem of using difficulty.

Thereby another object of the present invention provides and a kind ofly is used for eliminating above-mentioned left hand people's smoothly inconvenience and also can produce the packing film device that uses difficulty, has the fin of having improved to right hand people smoothly.And then, the purpose of this invention is to provide and a kind of lining cement is configured on the fin outside face so that the ora terminalis of the packaging film that is drawn out can not be pulled back to the packing film device on the volume.Other purposes of the present invention and advantage can become clear in claims, accompanying drawing and the following description.

Summary of the invention

Packing film device of the present invention can furl packaging film to be contained in the container and also packaging film can be pulled out outside container.Container comprises box main body and lid.Box main body has case antetheca, rear wall, diapire and opposed two case end walls and by the opening that case antetheca, rear wall and opposed two case end wall tops surround, and also has to be attached on the case antetheca top and bond layer that the secondary antetheca that roughly extends downwards along the case antetheca in box main body inside, the packaging film that prevents to be drawn out return on volume and make packaging film and cut off the fin that the edge leaves from the case antetheca.Lid have upper wall, the lid antetheca, be fixed in the cut-out blade that cover on the antetheca, upper wall is attached on the rear wall top, the cut-out blade blade tip be configured to, when lid is closed opening this blade tip and case antetheca below outside face adjacent.Although cutting off the shape of the blade tip of blade also can be linear, preferably has the vee shape at outstanding top downwards.

In packing film device of the present invention, fin is that the part of case antetheca has been cut and formed in the mode that stays the connecting part that links with secondary antetheca, and the lower edge of fin rotates with respect to the case antetheca under the effect of the elastic force that the connecting part by fin and secondary antetheca produces.By fin being configured to comprise the bisector of the distance between opposed two case end walls, people and left hand people both sides smoothly smoothly can be with a kind of commodity correspondence for the right hand.In addition, be suitable for right hand people smoothly and left hand people's smoothly commodity respectively by fin being staggered to a side or the opposing party from the position of the bisector that comprises the distance between the case end wall, can making.In the present invention, " preceding " refers to that substantially the volume to be accommodated in the box main body is the side that benchmark approaches to cut off blade, and " back " is meant its opposition side.In addition, " on " refer to that substantially the volume to be accommodated in the box main body is the side that benchmark approaches opening.

Packing film device of the present invention preferably possesses following structure.Promptly, if establish the width of upper wall (21), be to be of a size of A between rear wall top (16) and the lid antetheca top (242), upper wall (21) is R from the angle of rotation of horizontal direction rotation, be of a size of S from lid antetheca top (242) to blade tip top (221), the width of opening (15), be to be of a size of B between rear wall top (16) and the fin connecting part (55), upperlimit between fin connecting part (55) and the fin lower edge (51) is H, fin (50) is X from the angle of rotation of vertical direction rotation, then as angle of rotation R, when X takes off certain value in the scope of formula (1) and (2) respectively

0＜R＜45°......(1)

0＜X＜45°......(2)

In the whole zone of fin lower edge, size A, B, S, H satisfy

S×cosR＝A×sinR+H×cosX......(3)

H×sinX≤(A×cosR+S×sinR)-B......(4)。

By such setting size A, B, S, H, can prevent above-mentioned " blade is wiped and bumped ".Formula (4) comprises the situation of following formula (4a) and formula (4b).

H×sinX＜(A×cosR+S×sinR)-B......(4a)

H×sinX＝(A×cosR+S×sinR)-B......(4b)

Under the situation of formula (4a), the blade tip 223 that cuts off blade can not contact on the fin lower edge, the packaging film on the fin lower edge can not cut off.Under the situation of formula (4b), the blade tip 223 that cuts off blade contacts on the fin lower edge, but does not push packaging film, so soft packaging film is to be out of shape lessly, can not be cut off.

In packing film device of the present invention, be that upperlimit between W, fin connecting part (55) and the fin lower edge (51) is H if establish the length of the connecting part (55) of above-mentioned fin, then ratio W/H is 0.5～10, is preferably 1～6, more preferably 2～5.Packing film device of the present invention can possess following structure.(1) case antetheca and secondary antetheca be with the ground paper of one in the kink bending and form, case antetheca top is formed by kink, above-mentioned fin connecting part is the part of kink.(2) top of the vee shape of cut-out blade is positioned near the bisector of the distance between opposed two lid end walls (or case end wall).(3) the linearly or curve-like of above-mentioned fin lower edge preferably has concave shaped portion.(4) make above-mentioned fin from the recuperability generation of the power of case antetheca rotation by above-mentioned kink.(5) above-mentioned bond layer is configured on the outside face of the outside face of case antetheca or above-mentioned fin.(6) comprise the blade tip that cover to cut off blade and strippingly be fixed in sealing wall on the case antetheca.(7) the sealing wall is formed by the extension of lid antetheca, and the connecting portion by easy fracture is connected and covers on the antetheca.The connecting portion of fracture for example is a sewing thread easily.(8) when the sealing wall by when the case antetheca is peeled off, the blade tip that cuts off blade exposes.Connecting portion forms from the blade tip that cuts off blade and leaves both vee shapes of sizing.(9) the sealing wall is bonded on the case antetheca by a plurality of adhesive portion, can make be near the area of the locational adhesive portion at the top of the vee shape that cuts off blade littler than the area that is in away from the locational adhesive portion at top.

Description of drawings

Fig. 1 is the approximate three-dimensional map before the use of the packing film device of one embodiment of the present of invention begins.

Fig. 2 A is that approximate three-dimensional map, Fig. 2 B of the packing film device of the state after the sealing wall 23 of the packing film device of Fig. 1 is removed is the elevation drawing of sealing wall 23.

Fig. 3 is the approximate three-dimensional map that the lid of the packing film device of presentation graphs 2A is in the state of release position.

Fig. 4 is the summary three-dimensional cutaway view of state that packaging film is pulled out from the packing film device of Fig. 3 by staff.

Fig. 5 is the approximate three-dimensional map with the case antetheca of the packing film device of Fig. 2 A and secondary antetheca expansion expression.

Fig. 6 is the approximate vertical view of the tab portion of expression packing film device of the present invention.

Fig. 7 is the approximate three-dimensional map of the tab portion of Fig. 6.

Fig. 8 is lid general profile chart packing film device, that cut open along bisector 2 of Fig. 2 A after move the release position a little.

Fig. 9 is the approximate three-dimensional map that the lid of the same packing film device of expression and Fig. 3 is in the state of release position, is the locational figure that fin is configured in the bisector that does not comprise two distances between the case end wall.

Figure 10 is that to make the lower edge of fin be the approximate vertical view of the tab portion of U font.

The specific embodiment

With reference to the description of drawings embodiments of the present invention.In the accompanying drawings, give identical mark and omit repeat specification for same parts.Fig. 1 is the approximate three-dimensional map of the use of the packing film device of one embodiment of the present of invention before beginning, and Fig. 2 A is that approximate three-dimensional map, Fig. 2 B of the packing film device of the state after the sealing wall 23 of the packing film device of Fig. 1 is pulled down is the elevation drawing of the sealing wall 23 pulled down from case antetheca 121.Fig. 3 is the approximate three-dimensional map that the lid of the packing film device of presentation graphs 2A is in the state of release position.Fig. 2 A represents sealing wall 23 is bonded in circular adhesive portion 132,134 on the case antetheca 121, and has omitted circular adhesive portion 132,134 in the antetheca 121 of Fig. 3.

Fig. 4 is the summary three-dimensional cutaway view of the state of packaging film being pulled out from the container 10 of the packing film device of Fig. 3 by

staff

61,62, and Fig. 5 is the approximate three-dimensional map that the case antetheca 121 of the packing film device of Fig. 2 A, secondary antetheca 125 etc. is launched expression.To shown in Figure 5, packing film device 1 is the structure that the volume 30 with packaging film 36 is accommodated in the container 10, packaging film 36 can be pulled out outside container as Fig. 1.Container 10 comprises box main body 12 and lid 20.Fig. 4 represents to hold container 10 and pinch the state that packaging film is pulled out with the right hand 62 with left hand 61.Fin 50 is configured on the position of bisector of the distance that comprises 123 of opposed two case end walls.

The opening 15 that box main body 12 has case antetheca 121, rear wall 122, diapire 124 and opposed two case end walls 123 and surrounded by the top of case antetheca 121, rear wall 122 and opposed two case end walls 123.And then box main body 12 possesses and is connected on the case antetheca top 17 and the secondary antetheca 125 that roughly extends downwards along case antetheca 121 in box main body inside, prevents the bond layer 14 (with reference to Fig. 3) that the packaging film 36 that is drawn out returns and make packaging film and cut off the fin 50 that edge 361 leaves from case antetheca 121 on volume 30.As shown in Figure 5, lid 20 possesses cooresponding two lid end walls 25.In addition, case antetheca 121 possesses the Fixed Division 136 that can be fixed on the case end wall 123.

Lid 20 has upper wall 21, lid antetheca 24 and is fixed in the cut-out blade 22 that covers on the antetheca.Upper wall 21 is attached on the rear wall top 16.Cut off blade 22 and be configured to, when lid 20 is closed the opening 15 of box main body adjacent to case antetheca 121 below outside face, and be vee shape downwards with outstanding top 221.The top 221 of vee shape that cuts off blade is near the bisector 2 of the distance between opposed two

lid end walls

25,25.

Fig. 4 represents to hold container 10 and pinch the state that packaging film 36 is pulled out with the right hand 62 with left hand 61.Fin 50 is configured on the position of the bisector that comprises the distance between opposed two case end walls 123.Therefore, approach the packaging film between user's case end wall 123 and the fin 50 (packaging film grip position) size (width) and from the user away from case end wall 123 and the packaging film size between the fin about equally.If fin 50 is configured on the position of bisector of the distance that comprises 123 of opposed two case end walls, then make under the hand situation opposite, promptly pinching with left hand 61 under the situation that packaging film 36 pulls out holding container 10 with the right hand 62 with Fig. 4, approach user's case end wall 123 and the packaging film between the fin 50 (fetch bit of pinching of packaging film is put) size (width) and from the user away from case end wall 123 and the size of the packaging film between the fin 50 also about equally, so such in the past use difficult problem can not take place.

Fig. 6 is the general view of the fin 50 of expression packing film device of the present invention, and Fig. 7 is the approximate three-dimensional map of the fin 50 of Fig. 6.Being used for making packaging film 36 and cutting off the fin 50 that leaves from case antetheca 121 at edge 361 is as Figure 6 and Figure 7 the part of case antetheca 121 to be cut and formed to stay with the mode of the connecting part 55 of secondary antetheca 125.The lower edge 51 of fin 50 leaves from case antetheca 121 under the effect of the elastic force that is produced by connecting part 55.Fin 50 is configured to, and comprises the bisector 2 of the distance between opposed two case end walls 123.In addition, in the shape of fin 50, lower edge 51 can be linearity or curve-like.Particularly, the shape of fin 50 also can be rectangle (square, oblong) or with fin connecting part 55 and lower edge 51 be upper base or go to the bottom trapezoidal.And then the central portion of lower edge 51 also can be spill 52.Spill 52 can be made vee shape as shown in Figure 6.And spill 52 can be made the U font as shown in Figure 10.In the case, the packaging film that is positioned on the spill 52 falls into slightly from finned surface, thereby produces the effect of " blade is wiped and bumped " at the top 221 that alleviates the vee shape that cuts off blade.In addition, pinching when getting film, because be spill, so have the effect that film is pinched easily.Recess 52 can have the otch of U font or vee shape.In Fig. 6 and Figure 10, the ratio W/H of the maximum height H of the length W of the connecting part of fin 50 and fin (upperlimit between fin connecting part 55 and the fin lower edge 51) is 0.5～1.0, is preferably 1～6, more preferably 2～5.At the length W of fin connecting part is that the maximum height H of fin is promptly under the situation more than 2 times perpendicular to the size on the direction of connecting part, bigger to the elastic force that fin applies by connecting part, the lower edge that can prevent fin is attached on the case antetheca 121 or undesirable condition such as can not leave fully and take place.

The packaging film that is fastened in the spill 52 partly approaches case antetheca 121, the problem of damaging so can avoid being pushed by the top 221 that the vee shape that rotates in its outside cuts off blade 22.Prevent that the packaging film 36 that is drawn out is configured on the outside face of fin 50 to rolling up the bond layer 14 that returns on 30.The bottom of the outside face of fin 50 is left from case antetheca 121 outside faces, be in the position of easy contact on the cut-out edge of packaging film 36, so the bond layer on the outside face of fin 50 can be bonding reliably and keep with the cut-out edge of the packaging film 36 that is drawn out.

Shown in Fig. 1, Fig. 2 A and Fig. 2 B, packing film device 1 has the blade tip that cover to cut off blade 22 and strippingly is fixed in sealing wall 23 on the case antetheca 121.Sealing wall 23 is formed by the extension of lid antetheca 24, and the connecting portion 241 by easy fracture is connected and covers on the antetheca 24.Connecting portion 241 forms from blade tip 223 and leaves both vee shapes of sizing, so that the blade tip 223 that is cut off blade 22 when case antetheca 121 is peeled off at sealing wall 23 exposes.In addition, shown in Fig. 2 A and Fig. 2 B, sealing wall 23 is bonded on the case antetheca 121 by a plurality of adhesive portion 132,134.A plurality of adhesive portion are rounded respectively, in the heart distance equates in the adjacent circular, and can make the area that is near the adhesive portion 134 of the position at the top 221 of the vee shape that cuts off blade 22, littler than the area that is in away from the adhesive portion 132 of the position at top 221.

Fig. 8 be lid 20 a little after move the release position, comprise the general profile chart of bisector 2 of the packing film device of Fig. 2 A.As shown in Figure 8, if lid 20 to the direction that the opening 15 of box main body 12 is opened around the rear wall top 16 anglec of rotation R, the vertical direction size S of top 242 of top 221 distance lid antethecas 24 of vee shape that then cuts off blade 22 is big more, and the distance of leaving from the packaging film 36 that is drawn out is big more.By making size S bigger, " blade is wiped and bumped " phenomenon that the packaging film 36 that is drawn out was pushed and cut off at the top 221 of the vee shape of cut-out blade 22 has the trend of minimizing.

But if in order to reduce " blade wipe bump " and increased in size S, then near the vertical dimension T the line 2 of the sealing wall 23 shown in Fig. 2 B diminish.Sealing wall 23 need stash blade tip 223, do not break again simultaneously from case antetheca 121 sur-face peelings, in addition, before packing film device uses, require to be bonded in reliably blade tips 223 coverings that blade was gone up, will be cut off on case antetheca 121 surfaces.Therefore, near the vertical dimension T the bisector 2 of sealing wall 23 need be for more than the certain value, more than for example 10mm.In the present invention, as shown in Figure 2, can make be near the area of the adhesive portion 134,134 of the position at the top 221 of the vee shape that cuts off blade 22 littler than the area of the adhesive portion 132 that is in the position far away apart from top 221.

In Fig. 8, the condition that " blade wipe bump " do not take place is, when the top 221 of the vee shape that cuts off blade 22 and fin lower edge 51 on above-below direction during position consistency, fin 50 is not pushed at top 221.In addition, in packing film device of the present invention, if establish the width of upper wall 21, be to be of a size of A between rear wall top 16 and the lid antetheca top 242, upper wall 21 is R from the angle of rotation of horizontal direction rotation, to the top 221 of blade tip, be of a size of S from lid antetheca top 242, the width of opening 15, be to be of a size of B between rear wall top 16 and the kink 55, upperlimit between fin kink 55 and the fin lower edge 51 is H, fin 50 is X from the angle of rotation of vertical direction rotation, then as angle of rotation R, when X takes off certain value in the scope of formula (1) and (2) respectively

0＜R＜45°......(1)

0＜X＜45°......(2)

Select size A, B, S, H, so that in the whole zone of fin lower edge, satisfy

S×cosR＝A×sinR+H×cosX......(3)

H×sinX≤(A×cosR+S×sinR)-B......(4)。

As an example, in the time of X=4 °, cutting off the angle that top 221 and the upperlimit of fin lower edge of the vee shape of blade partly contact is R=9 ° when A=43mm, B=43mm, S=27mm, H=20mm.At this moment, according to calculating formula as can be known, H * sinX=3.10mm, (A * cosR+S * sinR)-B=3.70mm satisfies the relation of following formula.Thus, can prevent above-mentioned " blade is wiped and bumped " of packing film device.

Above-mentioned formula (4) comprises H * sinX=(situation of A * cosR+S * sinR)-B...... (4b), but in the case, the blade tip 223 that cuts off blade just contact on the fin lower edge and do not push packaging film, so soft packaging film can not be cut off (damage).That is, can not cause " blade is wiped and bumped " in fact.In packing film device of the present invention, the fin preferred disposition is to comprise the bisector of the distance between opposed two case end walls.Therefore, approach the packaging film between user's case end wall and the fin (packaging film grip position) size (width) and from the user away from the case end wall and the packaging film size between the fin about equally.Therefore, eliminated under the position of leaving from above-mentioned bisector is provided with the situation of fin, to right hand people or the inconvenience that produces of left hand people's smoothly a certain class people smoothly, can provide concerning the right hand smoothly the people and left hand people both sides smoothly all easy-to-use packing film device.

In packing film device of the present invention, the lower edge of fin has concave shaped portion.By taking such structure, can not provide to take place " blade is wiped and bumped ", being that packaging film is cut off by vee shape and pushed near the top of blade and make the packing film device of the cut undesirable condition of packaging film.In packing film device of the present invention, prevent that the bond layer that the packaging film that is drawn out returns is configured on the outside face of fin 50 on volume.The bottom of the outside face of fin is left from the outside face of case antetheca, be on the position at easy contact packing film and cut-out edge (ora terminalis) thereof, so the performance of the bond layer on the outside face of fin is more bonding and the effect of the ora terminalis of the packaging film that maintenance is drawn out.

Fig. 9 is the variation of the packing film device of Fig. 3, is to represent that the lid of packing film device is in the approximate three-dimensional map of the state of release position.In the packing film device of Fig. 9, fin 50 is configured on the position of the bisector that does not comprise two distances between the case end wall.In Fig. 9, be used for preventing being configured on the outside face of fin 50 to volume 30 bond layers that return 14 from the end of rolling up 30 packaging films of pulling out 36, also be configured on the case antetheca 121.

In packing film device of the present invention, the sealing wall is formed by the extension of lid antetheca and the connecting portion by easy fracture is connected and covers on the antetheca.Connecting portion has from the blade tip that cuts off blade and leaves both vee shapes of sizing, so that the blade tip that is cut off blade at the sealing wall when the case antetheca is peeled off exposes.The sealing wall is bonded on the case antetheca by a plurality of adhesive portion, is near the area of the adhesive portion of the position at the top of the vee shape that cuts off blade littler than the area that is in away from the adhesive portion of the position at top.Therefore, the sealing wall energy is enough hides blade tip, and can be peeled off from the case front wall surfaces with not rupturing, in addition, has the advantage that can be bonded in the blade tip of covering cut-out blade on the case front wall surfaces before packing film device uses reliably.

In the present invention, be spill near the central portion of the lower edge of fin, the length W of the connecting part of fin and the ratio W/H of the maximum height H of fin are (Fig. 6, Figure 10) more than 2.Promptly, the size W of the connecting part of fin is the maximum height H of fin, promptly perpendicular to more than 2 times of the size on the direction of connecting part, thereby bigger to the elastic force that fin applies by connecting part, the lower edge that can prevent fin is attached on the case antetheca 121 or the undesirable condition that can not leave fully.In addition, be fastened on packaging film on the concave portions of fin and partly approach the case antetheca and locate, push and the problem damaged at the top of having avoided being subjected to the vee shape that rotates in its outside to cut off blade.

In the embodiment of Fig. 3 of the present invention, Fig. 5, Fig. 6, on the bisector that is centered close to the distance between the opposed case end wall 123,123 of the spill of the top 221 of the vee shape of cut-out blade 22 and the lower edge 51 of fin, thus, the top 221 of vee shape is left from the lower edge 51 of fin, thus, the packaging film on the lower edge 51 of fin can not pushed in the top 221 that cuts off blade.But, being centered close on the straight line 2 ' (Figure 10) parallel of the spill of the top 221 by making the vee shape that cuts off blade 22 and the lower edge 51 of fin with bisector 2, rather than be positioned on the bisector 2, also can make the top 221 that cuts off blade can not push the packaging film on the lower edge 51 of fin.

Claims

1, a kind of packing film device is packaging film can be rolled up (30) to be accommodated in the container (10) and the packing film device that packaging film can be pulled out outside container, it is characterized in that,

Container comprises box main body (12) and lid (20);

Box main body (12) has case antetheca (121), rear wall (122), diapire (124) and opposed two case end walls (123) and by the opening (15) that case antetheca top, rear wall top and above-mentioned two case end wall tops surround, and also has to be attached on the case antetheca top and bond layer (14) that the secondary antetheca (125) that extends downwards along the case antetheca in box main body inside, the packaging film (36) that prevents to be drawn out return on volume and the fin (50) that packaging film ora terminalis (361) is left from the case antetheca;

Lid has upper wall (21), lid antetheca (24) and is fixed in the cut-out blade (22) that covers on the antetheca, upper wall (21) is attached on the rear wall top (16), the blade tip (223) that cuts off blade is configured to, when lid is closed opening this blade tip and case antetheca below outside face adjacent;

Above-mentioned fin (50) is in the mode with the fin connecting part (55) that links with secondary antetheca the part of case antetheca (121) have been cut and formed;

Above-mentioned bond layer (14) is arranged at least a portion of outside face of fin (50).

2, packing film device as claimed in claim 1, it is characterized in that, be that upperlimit between W, fin connecting part (55) and the fin lower edge (51) is H if establish the length of the connecting part (55) of above-mentioned fin, and then ratio W/H is 0.5～10, be preferably 1～6, more preferably 2～5.

3, packing film device as claimed in claim 1 is characterized in that,

If establish the width of upper wall (21), be to be of a size of A between rear wall top (16) and the lid antetheca top (242), upper wall (21) is R from the angle of rotation of horizontal direction rotation, be of a size of S from lid antetheca top (242) to blade tip top (221), the width of opening (15), be to be of a size of B between rear wall top (16) and the case antetheca top (17), upperlimit between fin connecting part (55) and the fin lower edge (51) is H, fin (50) is X from the angle of rotation of vertical direction rotation, then as angle of rotation R, when X takes off certain value in the scope of formula (1) and (2) respectively

0＜R＜45°......(1)

0＜X＜45°......(2)

In the whole zone of fin lower edge, satisfy

S×cosR＝A×sinR+H×cosX......(3)

H×sinX≤(A×cosR+S×sinR)-B......(4)。

4, packing film device as claimed in claim 3, it is characterized in that, above-mentioned fin (50) is configured to, the bisector (2) that comprises the distance between opposed two case end walls (123,123), the blade tip of above-mentioned cut-out blade (223) dispose in the adjacent mode of outside face below this blade tip and the case antetheca when lid is closed opening and are the vee shape with outstanding top (221) downwards.

5, packing film device as claimed in claim 4, it is characterized in that, above-mentioned case antetheca (121) and secondary antetheca (125) are made of a ground paper, case antetheca top (17) is the kink of above-mentioned ground paper, fin connecting part (55) is the part of above-mentioned kink, the top (221) that cuts off the vee shape of blade (22) be positioned at the distance between opposed two case end walls (123,123) bisector (2) near, fin lower edge (51) has concave shaped portion (52).

6, packing film device as claimed in claim 1 is characterized in that, above-mentioned bond layer (14) is configured on the outside face of the outside face of case antetheca (121) or above-mentioned fin (50).

7, packing film device as claimed in claim 1 is characterized in that, above-mentioned fin (50) possesses linearity or curvilinear lower edge (51).

8, packing film device as claimed in claim 6 is characterized in that, the lower edge (51) of above-mentioned fin (50) is spill (52).

9, packing film device as claimed in claim 1 is characterized in that, above-mentioned cut-out blade (22) is linearly.

10, packing film device as claimed in claim 1 is characterized in that, above-mentioned fin (50) rotates above-mentioned angle of rotation X from the case antetheca under the effect of the recuperability of above-mentioned kink (55).

11, packing film device as claimed in claim 1, it is characterized in that, also comprise the blade tip (223) that cover to cut off blade and strippingly be fixed in sealing wall (23) on the case antetheca (121), sealing wall (23) is formed by the extension of lid antetheca (24), and be connected by the easy connecting portion (241) of fracture and cover on the antetheca, also be bonded on the case antetheca, make the blade tip (223) that is cut off blade when the case antetheca is peeled off at sealing wall (23) expose by a plurality of adhesive portion (132,134).

12, packing film device as claimed in claim 4, it is characterized in that, also comprise the blade tip (223) that cover to cut off blade and strippingly be fixed in sealing wall (23) on the case antetheca (121), sealing wall (23) is formed by the extension of lid antetheca (24), and be connected by the easy connecting portion (241) of fracture and cover on the antetheca, also by a plurality of adhesive portion (132,134) be bonded on the case antetheca, make the blade tip (223) that is cut off blade when the case antetheca is peeled off at sealing wall (23) expose, and, be near the area of the locational adhesive portion (134) at the top (221) that cuts off blade littler than the area that is in away from the locational adhesive portion (132) at top.