KR20080079610A - Lap film device with flap - Google Patents

Abstract

A wrap film cutting device having an improved flap is provided to remove a blade trace from the cut wrap film and to enable both left/right handed people. A wrap film cutting device comprises: a main body of box which includes a front wall (121), a rear wall(122), a bottom wall(124), 2 marginal walls facing each other, and an open hole of the box, and an adhesive layer, and a flap(50) arranged to include the half line of distance between the 2 marginal walls facing each other; and a cover of box which includes a front wall of the cover(24), a cut blade(22) fixed on the front wall of the cover, a V-shaped blade end and an upper wall(21). A size of the flap(H) satisfies a following equation: S x cosR = A x sinR + H x cosX, and H x sinX <= (A x corR + S x sinR) - B.

Description

Wrap film device with flap {LAP FILM DEVICE WITH FLAP}

The present invention relates to a wrap film device in which a roll of wrap film used for food and other packaging is accommodated in a container so that the wrap film can be easily taken out of the container. More specifically, the present invention eliminates a phenomenon called "blade marks" in which the cutting blade presses the wrap film taken out from the container and damages the wrap film, and at the same time, inconvenience for both the left-handed and the right-handed person. Provided is an improved wrap film device that does not occur. The present invention also provides a wrap film having a flap for separating the wrap film and its end edges (cut edges) away from the container wall and gripping the end edges of the wrap film with a finger to allow the wrap film to be pulled out of the container. Relates to a device.

Conventionally, a roll of wrap film for food and other packaging is accommodated in a container, and when a wrap film is used, a predetermined amount of wrap film is taken out of the container by a human hand and cut and used by a cutting blade provided in the container. A wrap film device is known which makes it possible. Patent document 1 discloses the film container for packaging provided with the container main body 11 which accommodates a roll-shaped wrap film, and the container lid part 12 rotatably connected to the top edge of the back part of a container main body. The packaging film container of patent document 1 is provided with the protrusion piece 15 and the peelable adhesive agent (stopper) 19 in the front wall part of a container.

[Patent Document 1] Japanese Patent Application Laid-Open No. 2005-178901

In a conventional wrap film device, a roll of a wrap film is accommodated in a container, and when a wrap film is used, the wrap film is taken out by a human hand out of the container by a predetermined length and cut and used by a cutting blade provided in the container Make it possible. When taking out the roll of a wrap film out of a container, there existed a so-called "blade mark" problem that a cutting blade presses the wrap film drawn out from the container and damages the drawn wrap film. That is, the "wrap marks" generate | occur | produced the problem that the wrap film was cut | disconnected and the wrap film part drawn out from the container was wound by a roll and returned. The 1st object of this invention is to provide the wrap film apparatus which eliminated the "blade trace."

In addition, in the conventional wrap film apparatus, when the wrap film and the cut edge thereof are attached to the outer wall of the container, it is difficult to hold the cut edge of the wrap film by human hands, so that part of the cut edge of the wrap film is eliminated. The flap for spaced apart from the container outer wall was provided. However, there is a disadvantage that the structure is not suitable for both right handed and left handed people. That is, the conventional flap is a flap so that a wide portion of the drawn wrap film is between the gripping portion and the user when gripping the wrap film with the right hand, which is a well-used arm, while holding the container with the left hand so as to be suitable for a right-handed person. Is positioned so that it is remote from the longitudinal center of the container with respect to the user. In this arrangement, in the case of a left-handed person, the flap is close to the user, which causes difficulty in use.

Accordingly, another object of the present invention is to provide a wrap film device having an improved flap for solving the inconvenience of the left-handed person and at the same time avoiding the difficulty of use for the right-handed person. Other objects and advantages of the present invention will become apparent from the claims, the accompanying drawings and the following description.

The wrap film device of the present invention accommodates a roll of wrap film in a container and enables the wrap film to be drawn out of the container. The container includes a box body and a lid. The box body has an opening surrounded by a box front wall, a rear wall, a bottom wall and two opposing box end walls and a box front wall, a rear wall and two opposing box end walls, and is connected to the box front wall upper side and A negative side wall extending downward downwardly along the box front wall, the pressure-sensitive adhesive layer which prevents the drawn wrap film from being returned to the roll, and the flap which separates the wrap film and its cut edges from the box front wall. The cover has a cutting blade secured to the upper wall, the cover front wall and the cover front wall, the upper wall is connected to the upper side of the rear wall, and the blade end is adjacent to the lower outer surface of the box front wall when the cover closes the opening. It has a V-shape that is disposed and at the same time protrudes downward.

In the wrap film device of the present invention, the flap is formed by cutting a portion of the box front wall, leaving a connection portion with the negative side wall, and the lower flap edge of the flap against the box front wall by the elastic force generated by the connection portion between the flap and the negative side wall. Rotated, the flap is arranged to include a bisector of the distance between two opposing box end walls. In the present invention, "before" refers to the side close to the cutting blade based on the roll accommodated in the box main body, and "after" points to the opposite side. In addition, "upper" points out the side near an opening on the basis of the roll accommodated in the box main body as an outline.

In the wrap film device of the present invention, the width of the upper wall 21, that is, the dimension between the rear wall upper side 16 and the cover front wall upper side 242 is A, and the rotation angle from the horizontal direction of the upper wall 21 is R. , S is the dimension from the front wall upper side 242 to the top end 221 of the blade end S, the width of the opening 15, that is, the dimension between the rear wall upper side 16 and the flap connecting portion 55 B, flap If the maximum dimension between the connecting portion 55 and the flap lower edge 51 is H and the rotation angle from the vertical direction of the flap 50 is X, the rotation angles R and X are respectively represented by Equations 1 and 2 below. When taking any value in the range of

[Equation 1]

0 <R <45 °

[Equation 2]

0 <X <45 °

In the entire area of the flap lower edge, the dimensions A, B, S, H are

[Equation 3]

S × cosR = A × sinR + H × cosX

[Equation 4]

H × sinX ≤ (A × cosR + S × sinR)-B

Is determined to satisfy. By setting the dimensions A, B, S and H in this way, the above-described "blade trace" can be prevented. Equation 4 includes the following Equations 4a and 4b.

[Equation 4a]

H × sinX <(A × cosR + S × sinR)-B

[Equation 4b]

H × sinX = (A × cosR + S × sinR)-B

In the case of Equation 4a, the blade tip 223 of the cutting blade does not contact the flap bottom edge, and thus does not cut the wrap film on the flap bottom edge. In the case of Equation 4b, the blade tip 223 of the cutting blade is in contact with the flap lower edge, but since the wrap film is not pressed, the flexible wrap film is not cut only by small deformation.

The wrap film apparatus of this invention can be equipped with the following structures. (1) The box front wall and the negative front wall are formed by bending a piece of thick paper at the bent portion, the upper side of the box front wall is formed by the bent portion, and the flap connecting portion is a part of the bent portion. (2) The V-shaped top of the cutting blade is located near the bisector of the distance between two opposing cover end walls (or box end walls). (3) The flap lower edge has a recess. (4) The force for rotating the flap from the box front wall is generated by the restoring force of the bent portion. (5) The pressure-sensitive adhesive layer is disposed on the outer surface of the box front wall or the outer surface of the flap. (6) It includes a sealing wall which covers the edge of the blade of the cutting blade and is detachably fixed to the front wall of the box. (7) The sealing wall is formed by an extension of the lid front wall and is connected by a connecting portion which is easy to break with respect to the lid front wall. The connection part which is easy to break is a joint, for example. (8) When the sealing wall is peeled off the box front wall, the blade tip of the cutting blade is exposed. The connection forms a V-shape spaced from the blade edge of the cutting blade. (9) The sealing wall is bonded to the box front wall by a plurality of bonding portions so that the area of the bonding portion at a position near the top of the V-shape of the cutting blade can be made smaller than the area of the bonding portion at a position far from the top. .

According to the present invention, an improved wrap film device which eliminates the "blade marks" that presses the wrap film drawn out from the container and damages the wrap film, and is free from inconvenience for both left-handed and right-handed people. Can be provided.

EMBODIMENT OF THE INVENTION Embodiment of this invention is described with reference to drawings. In the accompanying drawings, the same members are denoted by the same reference numerals and redundant descriptions are omitted. 1 is a schematic perspective view of a wrap film device of an embodiment of the present invention before initiation of use, FIG. 2A is a schematic perspective view of a wrap film device with the sealing wall 23 of the wrap film device of FIG. 1 removed; FIG. B is an elevation view of the sealing wall 23 removed from the box front wall 121. FIG. 3 is a schematic perspective view showing a state where the lid of the wrap film device of A of FIG. 2 is in the open position. FIG. 2A shows circular adhesive portions 132 and 134 for adhering the sealing wall 23 to the box front wall 121, while circular adhesive portions 132 and 134 are shown for the front wall 121 of FIG. Is omitted.

Fig. 4 is a schematic perspective cross-sectional view showing a state in which the user pulls the wrap film out of the container 10 of the wrap film device of Fig. 3 by human hands 61 and 62, and Fig. 5 is the wrap film device of Fig. 2A. It is a schematic perspective view which expands and shows the box front wall 121, the negative side wall 125, etc. of this. As shown in Figs. 1 to 5, the wrap film device 1 has a structure in which the roll 30 of the wrap film 36 is accommodated in the container 10 so that the wrap film 36 can be pulled out of the container. Have The container 10 includes a box body 12 and a lid 20. 4 shows the state of holding the container 10 with the left hand 61 and holding the wrap film with the right hand 62 to take out. The flap 50 is disposed at a location that includes a bisector of the distance between two opposing box end walls 123.

The box body 12 includes a box front wall 121, a rear wall 122, a bottom wall 124, and two opposing box end walls 123 and a box front wall 121, a rear wall 122 and opposing sides. The opening 15 is surrounded by the upper sides of the two box end walls 123. In addition, the box body 12 is connected to the box front wall upper side 17, the negative front wall 125, the drawn wrap film 36, which extends downwardly along the box front wall 121 almost downward, rolls the inside of the box body. The adhesive layer 14 (refer FIG. 3) which prevents return to 30, and the flap 50 which separate the wrap film and its cutting edge 361 from the box front wall 121 are provided. As shown in FIG. 5, the lid 20 has two corresponding lid end walls 25. In addition, the box front wall 121 has a fixing portion 136 that can be fixed to the box end wall 123.

The lid 20 has an upper wall 21, a lid front wall 24 and a cutting blade 22 secured to the lid front wall. The upper wall 21 is connected to the rear wall upper side 16. The cutting blade 22 has a V having a top portion 221 which is disposed adjacent to the lower outer surface of the box front wall 121 and protrudes downward when the cover 20 closes the opening 15 of the box body. It has a shape. The V-shaped top end 221 of the cutting blade is located near the bisector 2 of the distance between two opposing lid end walls 25, 25.

FIG. 4 shows a state in which the container 10 is held by the left hand 61, the grip film 36 is gripped and pulled out by the right hand 62. The flap 50 is disposed at a location that includes a bisector of the distance between two opposing box end walls 123. Therefore, the dimensions (width) of the wrap film between the box end wall 123 and the flap 50 (handling position of the wrap film) close to the user, and between the box end wall 123 and the flap spaced from the user The wrap film dimensions are about the same. When the flap 50 is disposed at a position including a bisector of the distance between two opposing box end walls 123, the hand is reversed from that in FIG. 4, that is, the container 10 is placed with the right hand 62. Even when grabbing and pulling out the wrap film 36 with the left hand 61, the dimensions (width) of the wrap film between the box end wall 123 and the flap 50 (handling position of the wrap film) close to the user are obtained. ) And the wrap film dimensions between the box end wall 123 and the flap 50 spaced apart from the user are approximately the same, so that the difficulty of conventional use does not occur.

FIG. 6 is a schematic plan view showing a flap 50 of the wrap film device of the present invention, and FIG. 7 is a schematic perspective view of the flap 50 of FIG. The flap 50 for separating the wrap film 36 and its cut edges 361 from the box front wall 121 has a portion of the box front wall 121 as shown in FIGS. 6 and 7. It is formed to cut and leave the connecting portion 55 and 125. The lower edge 51 of the flap 50 is spaced apart from the box front wall 121 by the elastic force generated by the connecting portion 55. The flap 50 is arranged to include a bisector 2 of the distance between two opposing box end walls 123. In addition, the shape of the flap 50 may be linear or curved shape of the lower edge 51. Specifically, the shape of the flap 50 may be square (square, rectangular), or the trapezoid which made the flap connection part 55 and the lower edge 51 the upper floor or the lower floor. In addition, the center part of the lower edge 51 may be concave 52. In this case, when the wrap film mounted on the concave 52 is slightly concave from the flap surface, the "blade trace" of the V-shaped top part 221 of a cutting blade will reduce. In addition, it has the effect of being easy to hold a film by becoming concave-type at the time of holding a film. The recess 52 may have a U-shaped or V-shaped cutout. The ratio (W / H) of the length W of the connecting portion of the flap 50 to the maximum height H of the flap is from 0.5 to 10, preferably from 1 to 6, more preferably from 2 to 5. If the length W of the connection part of the flap is 2 or more, with respect to the maximum height H of the flap, i.e. the dimension perpendicular to the connection part, the elastic force imparted to the flap by the connection part is large, and the lower edge of the flap is the box front wall. It is possible to prevent the problem of being attached to 121 or not sufficiently spaced apart.

The portion of the wrap film that engages in the recess 52 is located close to the box front wall 121, so that it is avoided to be pressed and damaged by the top 221 of the V-shaped cutting blade 22 that rotates its outside. Can be. An adhesive layer 14 which prevents the drawn wrap film 36 from being returned onto the roll 30 is disposed on the outer surface of the flap 50. Since the outer surface of the flap 50 is in a position where the lower side thereof is spaced apart from the outer surface of the box front wall 121 and is easily in contact with the cut edge of the wrap film 36, the adhesive layer on the outer surface of the flap 50 is drawn out. The cut edges of the film 36 are firmly adhered and held.

As shown in Fig. 1, Fig. 2A and Fig. 2B, the sealing film device 1 covers the edge of the cutting blade 22 and at the same time the sealing wall is detachably fixed to the box front wall 121. And (23). The sealing wall 23 is formed by the extension part of the cover front wall 24, and is connected by the connection part 241 which is easy to break with respect to the cover front wall 24. As shown in FIG. The connecting portion 241 forms a V-shape spaced from the blade tip 223 so that the blade tip 223 of the cutting blade 22 is exposed when the sealing wall 23 is peeled from the box front wall 121. 2 and 2, the sealing wall 23 is adhered to the box front wall 121 by a plurality of bonding portions 132 and 134. As shown in FIG. The plurality of adhesive portions each have a circular shape, and the distance between the centers of adjacent circular circles is equal, and the area of the adhesive portion 134 at a position close to the V-shaped top portion 221 of the cutting blade 22 is determined by the top portion ( It can make it smaller than the area of the adhesion part 132 located in the position far from 221.

8 is a schematic cross-sectional view including a bisector 2 of the wrap film device of A of FIG. 2 with the lid 20 moved to an open position to some extent. As shown in Fig. 8, the V-shaped top end 221 of the cutting blade 22 is formed on the upper wall 16 of the rear wall in the direction in which the lid 20 opens the opening 15 of the box body 12. When the angle R is rotated around, the larger the vertical dimension S from the upper side 242 of the lid front wall 24 is, the larger the distance from the drawn wrap film 36 is. By increasing the dimension S, there is a tendency to reduce the "blade trace" which presses and cuts the wrap film 36 which the V-shaped top part 221 of the cutting blade 22 pulled out.

However, when the dimension S is increased to reduce the "blade trace", the vertical dimension T near the line 2 of the sealing wall 23 shown in FIG. 2B becomes small. The sealing wall 23 covers the edge of the blade 223 and needs to be peeled off the surface of the box front wall 121 without breaking, and also adheres securely to the surface of the box front wall 121 before use of the wrap film device. To cover the blade tip 223 of the cutting blade. For this reason, the vertical dimension T near the bisector 2 of the sealing wall 23 is required to be equal to or more than a predetermined value, for example, 10 mm or more. In the present invention, as shown in Fig. 2, the areas of the adhesive portions 134 and 134, which are close to the top 221 of the V-shape of the cutting blade 22, are located at a position far from the top 221. It can be made smaller than the area of the adhesion part 132.

In Fig. 8, when the V-shaped top end 221 of the cutting blade 22 coincides with the flap lower edge 51, the top end 221 does not press the flap 50. Not being a condition that does not cause "blade marks" (assuming that the maximum dimension H is on the bisector 2). In addition, in the wrap film device of the present invention, the width of the upper wall 21, that is, the dimension between the rear wall upper side 16 and the cover front wall upper side 242 is A and the rotation angle from the horizontal direction of the upper wall 21. R, the dimension from the upper side of the front wall 242 of the cover to the top end 221 of the blade edge S, the width of the opening 15, that is, the dimension between the rear wall upper side 16 and the bent portion 55 of B If the maximum dimension between the flap bent portion 55 and the flap lower edge 51 is H and the rotation angle from the vertical direction of the flap 50 is X, the rotation angles R and X are respectively represented by Equation 1 below. And taking any value in the range of Expression 2,

[Equation 1]

0 <R <45 °

[Equation 2]

0 <X <45 °

In the entire area of the flap lower edge, the dimensions (A, B, S, H) are

[Equation 3]

S × cosR = A × sinR + H × cosX

[Equation 4]

H × sinX ≤ (A × cosR + S × sinR)-B

Dimensions A, B, S and H are selected to satisfy. As an example, the angle at which the V-shaped top 221 of the cutting blade is in contact with the largest dimension portion of the lower edge of the flap when X = 4 ° is A = 43 mm, B = 43 mm, S = 27 mm, H When = 20 mm, R = 9 degrees. In that case, it turns out that HxsinX = 3.10mm and (Axcos + RxsinR) -B = 3.70mm at that time, and satisfy | fills the relationship of the said formula. Thereby, the above-mentioned "blade mark" of a wrap film apparatus can be prevented.

The above formula 4 includes the case of H x sinX = (A x cosR + S x sinR)-B (Equation 4b), but in this case, the cutting edge 223 of the cutting blade only contacts the lower edge of the flap. Since the wrap film is not pressed, the flexible wrap film is not cut (damaged). That is, it does not produce a "blade mark" substantially. In the wrap film device of the present invention, the flap is arranged to include a bisector of the distance between two opposing box end walls. Therefore, the dimensions (width) of the wrap film between the box end wall and the flap (handling position of the wrap film) close to the user and the wrap film dimension between the box end wall and the flap spaced from the user are approximately equal. Therefore, the wrap film which is easy to use for both a right-handed person and a left-handed person eliminates the inconvenience which a left-handed person or a right-handed person produces when a flap is installed in the position separated from the said bisector. A device can be provided.

In the wrap film device of the present invention, the lower edge of the flap has a recess. By adopting such a configuration, it is possible to provide an improved wrap film device in which the "blade marks", that is, the wrap film is pressed by the vicinity of the top of the V-shaped cutting blade and the wrap film is not cut off.

In the wrap film device of the present invention, the pressure-sensitive adhesive layer for preventing the drawn wrap film from being returned onto the roll is disposed on the outer surface of the flap. Since the outer surface of the flap is in a position where the lower side is spaced apart from the outer surface of the box front wall and is in contact with the wrap film and its cut edge (end edge), the adhesive layer on the outer surface of the flap makes the end edge of the drawn wrap film more secure. It has the effect of sticking and holding.

In the wrap film device of the present invention, the sealing wall is formed by an extension of the lid front wall and is connected by a connection portion that is easily broken against the lid front wall. The connecting portion has a V-shape spaced a predetermined dimension away from the cutting edge of the cutting blade so that when the sealing wall is peeled off the box front wall, the cutting edge of the cutting blade is exposed. The sealing wall is bonded to the box front wall by a plurality of bonding portions so that the area of the bonding portion at a position near the top of the V-shape of the cutting blade is smaller than the area of the bonding portion at a position far from the top. Therefore, the sealing wall can be peeled off from the box front wall surface without breaking the blade end, and can be reliably adhered to the box front wall surface before the use of the wrap film device to cover the blade end of the cutting blade. That has the advantage.

In this invention, the vicinity of the center part of the lower edge of a flap becomes concave, and ratio (W / H) of the length W of the connection part of a flap, and the maximum height H of a flap is two or more. That is, since the dimension W of the connection part of the flap is 2 or more with respect to the maximum height H of the flap, ie, the dimension perpendicular to the connection part, the elastic force imparted to the flap by the connection part is large, and the lower edge of the flap is boxed. It may be prevented that a problem that may be attached to the front wall 121 or not sufficiently spaced apart occurs. In addition, the wrap film portion engaging with the concave portion of the flap is located close to the box front wall and can be avoided from being damaged by being pressed by the top of the V-shaped cutting blade that rotates its outside.

1 is a schematic perspective view before the start of use of the wrap film device of one embodiment of the present invention;

FIG. 2A is a schematic perspective view of the wrap film device with the sealing wall 23 of the wrap film device of FIG. 1 removed, and FIG. 2B is an elevational view of the sealing wall 23. FIG.

Fig. 3 is a schematic perspective view showing a state in which the lid of the wrap film device of A of Fig. 2 is in an open position;

Fig. 4 is a schematic perspective cross-sectional view showing a state in which a wrap film is taken out by a human hand from the wrap film device of Fig. 3.

FIG. 5 is a schematic perspective view showing the box front wall and the negative front wall of the wrap film device of FIG.

Fig. 6 is a schematic plan view showing a flap portion of the wrap film device of the present invention.

Figure 7 is a schematic perspective view of the flap portion of Figure 6;

FIG. 8 is a schematic cross-sectional view along the bisector 2 of the wrap film device of FIG. 2A with the lid moved to an open position to some extent.

<Explanation of symbols for the main parts of the drawings>

1: wrap film device

2: bisector

10: container

12: box body

14: adhesive layer

15: opening

16: upper side of the rear wall

17: upper side of the front wall of the box (bend)

20: cover

21: upper wall

22: cutting blade

23: sealing wall

24: cover front wall

25: cover end wall

30: roll

36: wrap film

50: flap

51: bottom edge of the flap

52: concave

55: flap connection part (upper side)

61: left hand

62: right hand

121: the front wall of the box

122: rear wall

123: box end wall

124: bottom wall

125: negative barrier

132, 134: adhesive

136: fastening

221 top

223: end of day

241 connection

242: upper side of the front wall of the cover

361: wrap film end corners

H: Maximum dimension of the flap

W: Length of the connection part of the flap

Claims (5)

It is a wrap film apparatus which accommodated the roll 30 of the wrap film in the container 10, and made it possible to pull out a wrap film out of the container, The container includes a box body 12 and a lid 20, The box body 12 includes a box front wall 121, a rear wall 122, a bottom wall 124, and two box end walls 123 facing each other and a box front wall upper side, a rear wall upper side, and the two box end walls. A negative front wall 125 and the drawn wrap film 36 are returned to the roll having an opening 15 surrounded by an upper side and connected to the upper side of the box front wall and extending downward inside the box body along the box front wall. Has a flap 50 that separates the pressure-sensitive adhesive layer 14 and the wrap film end edge 361 from the box front wall, The cover has an upper wall 21, a cover front wall 24, and a cutting blade 22 fixed to the cover front wall, and the upper wall 21 is connected to the rear wall upper side 16, and the blade tip 223 of the cutting blade. ) Is a V-shape having a top portion 221 which is disposed adjacent to the lower outer surface of the box front wall and protrudes downward when the lid closes the opening, The flap 50 is formed by cutting a portion of the box front wall 121 so as to have a flap connecting portion 55 to connect with the negative front wall, and further, two of the distances between the two box end walls 123 and 123 facing each other. Disposed to include an equisector 2, The width of the upper wall 21, that is, the dimension between the rear wall upper side 16 and the cover front wall upper side 242 is A, the rotation angle from the horizontal direction of the upper wall 21 is R, the cover front wall upper side 242 from The dimension to the top end 221 of the blade tip is S, the width of the opening 15, that is, the dimension between the rear wall upper side 16 and the box front wall upper side 17 is B, the flap connection part 55 and the flap lower part. If the maximum dimension between the edges 51 is H and the rotation angle from the vertical direction of the flap 50 is X, the rotation angles R and X are any values within the ranges of the following Expressions 1 and 2, respectively. When taking [Equation 1] 0 <R <45 ° [Equation 2] 0 <X <45 ° In the whole area of the flap lower edge, [Equation 3] S × cosR = A × sinR + H × cosX [Equation 4] H × sinX ≤ (A × cosR + S × sinR)-B The wrap film device characterized in that is satisfied. According to claim 1, wherein the box front wall 121 and the negative side wall 125 is made of a single piece of thick paper, the box front wall upper side 17 is a bent portion of the thick paper, flap connecting portion 55 Is a part of the bent portion, the V-shaped top end 221 of the cutting blade 22 is located in the vicinity of the bisector 2 of the distance between two opposing box end walls 123, 123, The wrap film device, characterized in that the flap lower edge (51) has a concave portion (52). The wrap film device according to claim 2, wherein the flap (50) is rotated by the rotation angle (X) from the front wall of the box by the restoring force of the bent portion (55). The wrap film device according to claim 1, wherein the pressure-sensitive adhesive layer (14) is disposed on an outer surface of the box front wall (121) or an outer surface of the flap (50). The sealing wall according to any one of claims 1 to 4, further comprising a sealing wall (23) which covers the blade end (223) of the cutting blade and is detachably fixed to the box front wall (121). The 23 is formed by an extension of the cover front wall 24 and is connected by a connection part 241 which is easy to break with respect to the cover front wall, and is cut off when the sealing wall 23 is peeled from the box front wall. The area of the adhesive portion 134, which is adhered by the plurality of adhesive portions 132 and 134 to the box front wall so that the blade tip 223 of the blade is exposed, is located near the top portion 221 of the cutting blade. The wrap film device, characterized in that it is smaller than the area of the adhesive portion 132 at a position far from the center.

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