JP2008239250A - Wrap film device with flap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wrap film device which is capable of eliminating any "blade touch" that a cutting blade presses a wrap film drawn out of a container and damages the wrap film, and free from any inconvenience in service for both right-handed and left-handed persons. <P>SOLUTION: In the wrap film device, a flap 50 is arranged to include a bisector of the distance between two box end walls 123 opposite to each other. The width of an upper wall 21 is denoted by A, the rotational angle of the upper wall 21 from the horizontal direction is denoted by R, the dimension from an upper ridge 242 of a lid front wall to a top 221 of a tooth is denoted by S, the width of an opening 15 is denoted by B, the maximum dimension of the flap 50 is denoted by H, and the rotational angle of the flap 50 from the vertical direction is denoted by X, respectively. When the rotational angles R, X are 0-45°, respectively, the dimensions A, B, S and H are selected to satisfy formulas S×cosR=A×sinR+H×cosX, and H×sinX≤(A×cosR+S×sinR)-B. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

TECHNICAL FIELD OF THE INVENTION

  The present invention relates to a wrap film apparatus in which a roll of a wrap film used for packaging of food and other products is accommodated in a container, and the wrap film can be easily pulled out of the container. More specifically, the present invention eliminates the phenomenon called “per edge” where the wrap film drawn from the container is pressed by the cutting blade and damages the wrap film, and is used for both left-handed and right-handed people. An improved wrap film apparatus that does not cause the above inconvenience is provided. Further, the present invention provides a wrap provided with a flap for separating the wrap film and its edge (cut edge) from the container wall surface, picking the edge of the wrap film with a finger, and drawing the wrap film out of the container. The present invention relates to a film apparatus.

Conventional technology

Conventionally, a roll of wrap film for food and other packaging is housed in a container, and when the wrap film is used, a predetermined amount of the wrap film is manually pulled out of the container and cut by a cutting blade provided in the container so that it can be used. Wrapping film devices are known. Patent document 1 discloses the packaging film container provided with the container main body 11 which accommodates a roll-shaped wrap film, and the container lid part 12 connected with the top edge of the rear surface part of the container main body so that rotation was possible. The packaging film container of Patent Document 1 includes a protruding piece 15 and a peelable adhesive (stopper varnish) 19 on the front wall portion of the container.
JP 2005-178901 A

  In a conventional wrap film apparatus, a wrap film roll is housed in a container, and when the wrap film is used, the wrap film is manually pulled out of the container by a predetermined length, and can be used by being cut by a cutting blade provided in the container. To do. When the roll of wrap film is pulled out of the container, there has been a so-called “cutting edge” problem that the cutting blade presses the wrap film drawn from the container and damages the drawn wrap film. That is, the wrap film was cut by the occurrence of “per blade”, and the wrap film portion pulled out from the container was wound back to the roll. A first object of the present invention is to provide a wrap film apparatus that eliminates the "per blade".

  Moreover, in the conventional wrap film apparatus, when the wrap film and its cutting edge adhere to the outer wall of the container, it is difficult to manually pick the cutting edge of the wrap film. A flap for separating a part from the outer wall of the container was provided. However, there was a disadvantage that the structure was not favorable for both right-handed and left-handed people. That is, when a conventional flap is used by a right-handed person, when a container is held with the left hand and the right hand of the holding arm is used to pull out the wrap film, a wide part of the drawn wrap film is placed between the picked part and the user. As is the case, the flap is positioned farther from the center of the container in the longitudinal direction of the container. Such an arrangement is difficult for the left-handed person to use because the flap is positioned closer to the user.

  Accordingly, another object of the present invention is to provide a wrap film device having an improved flap that eliminates the inconvenience of the left-handed person and does not cause difficulty for the right-handed person. Other objects and advantages of the invention will be apparent from the claims, the accompanying drawings, and the following description.

  The wrap film apparatus of this invention accommodates the roll of a wrap film in a container, and enables a wrap film to be drawn out of a container. The container includes a box body and a lid. The box body has a box front wall, a rear wall, a bottom wall and two opposing box end walls, and an opening surrounded by the box front wall, the rear wall, and the two opposing box end walls. A sub-front wall connected to the upper side of the wall and extending downward substantially along the front wall of the box main body, an adhesive layer for preventing the drawn wrap film from returning onto the roll, and the wrap film and its cutting edge It has a flap spaced from the front wall of the box. The lid has an upper wall, a front wall of the lid, and a cutting blade fixed to the front wall of the lid, the upper wall is connected to the upper side of the rear wall, and the cutting edge of the cutting blade is in front of the box when the lid closes the opening. It is V-shaped with a top located adjacent to the lower outer surface of the wall and projecting downward.

  In the wrap film apparatus of the present invention, the flap is formed by cutting and raising a part of the front wall of the box leaving the connecting portion with the auxiliary front wall, and the lower edge of the flap is generated by the connecting portion of the flap and the auxiliary front wall. It is rotated with respect to the box front wall by the elastic force, and the flap is arranged so as to include a bisector of the distance between the two box end walls facing each other. In the present invention, “front” generally indicates the side close to the cutting blade with reference to the roll accommodated in the box body, and “rear” indicates the opposite side. Further, “upper” generally indicates the side closer to the opening with reference to the roll accommodated in the box body.

In the wrap film apparatus of the present invention, the width of the upper wall (21), that is, the dimension between the rear wall upper side (16) and the lid front wall upper side (242) is A, and the upper wall (21) is rotated from the horizontal direction. The corner is R, the dimension from the top side (242) of the lid front wall to the top (221) of the blade edge, the width of the opening (15), that is, the dimension between the top side (16) of the rear wall and the flap connecting part (55). B, where the maximum dimension between the flap 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 When taking a value in the range of the following formulas (1) and (2),
0 <R <45 ° (1)
0 <X <45 ° (2)
Dimensions A, B, S, and H are all over the lower edge of the flap. S × cosR = A × sinR + H × cosX (3)
H × sinX ≦ (A × cosR + S × sinR) −B (4)
To be satisfied. By setting the dimensions A, B, S, and H in this way, it is possible to prevent the aforementioned “blade hit”. Formula (4) includes the following formula (4a) and formula (4b).
H × sinX <(A × cosR + S × sinR) −B (4a)
H × sinX = (A × cosR + S × sinR) −B (4b)
In the case of the formula (4a), the blade edge 223 of the cutting blade does not contact the flap lower edge and does not cut the wrap film on the flap lower edge. In the case of Formula (4b), the cutting edge 223 of the cutting blade comes into contact with the lower edge of the flap, but does not press the wrap film, so that the flexible wrap film is deformed only slightly and is not cut.

  The wrap film apparatus of this invention can be equipped with the following structure. (1) The box front wall and the sub-front wall are formed by folding an integral cardboard at the folding part, the upper side of the box front wall is formed by the folding part, and the flap connecting part is a part of the folding part. . (2) The V-shaped top of the cutting blade is located in the vicinity of the bisector of the distance between two opposing lid end walls (or box end walls). (3) The flap lower edge has a concave portion. (4) The force for rotating the flap from the box front wall is generated by the restoring force of the bent portion. (5) The said adhesive layer is arrange | positioned on the outer surface of a box front wall, or the outer surface of the said flap. (6) A sealing wall that covers the cutting edge of the cutting blade and is removably fixed to the front wall of the box is included. (7) The sealing wall is formed by an extension of the lid front wall and is connected to the lid front wall by a joint that can be easily broken. The joint part that is easily broken is, for example, a perforation. (8) When the sealing wall is peeled off from the front wall of the box, the cutting edge of the cutting blade is exposed. The connecting portion has a V shape that is spaced from the cutting edge of the cutting blade by a predetermined dimension. (9) The sealing wall is bonded to the front wall of the box by a plurality of bonding portions, and the area of the bonding portion located near the V-shaped top of the cutting blade is smaller than the area of the bonding portion located far from the top. can do.

BEST MODE FOR CARRYING OUT THE INVENTION

  Embodiments of the present invention will be described with reference to the drawings. In the accompanying drawings, similar members are denoted by the same reference numerals, and redundant description is omitted. FIG. 1 is a schematic perspective view of a wrap film apparatus according to an embodiment of the present invention before the start of use, and FIG. 2A is a schematic view of the wrap film apparatus with the sealing wall 23 of the wrap film apparatus of FIG. 1 removed. FIG. 2B is a perspective view of the sealing wall 23 removed from the box front wall 121. FIG. FIG. 3 is a schematic perspective view showing a state where the lid of the wrap film apparatus of FIG. 2A is in the open position. 2A shows circular adhesive portions 132 and 134 for adhering the sealing wall 23 on the box front wall 121, but the circular adhesive portions 132 and 134 are omitted from the front wall 121 of FIG.

  4 is a schematic perspective cross-sectional view showing a state in which the user pulls out the wrap film from the container 10 of the wrap film apparatus of FIG. 3 by the hands 61 and 62, and FIG. 121 is a schematic perspective view showing the sub-front wall 125 and the like in a developed state. As shown in FIGS. 1 to 5, the wrap film apparatus 1 has a structure in which the roll 30 of the wrap film 36 is accommodated in the container 10 and the wrap film 36 can be drawn out of the container. The container 10 includes a box body 12 and a lid 20. FIG. 4 shows a state in which the container 10 is held by the left hand 61 and the wrap film is picked up by the right hand 62 and pulled out. The flap 50 is disposed at a position including a bisector of the distance between the two opposing box end walls 123.

  The box body 12 is surrounded by a box front wall 121, a rear wall 122, a bottom wall 124 and two opposing box end walls 123, and an upper side of the box front wall 121, the rear wall 122 and the two opposing box end walls 123. Opening 15 is provided. Further, the box body 12 is connected to the upper side 17 of the box front wall, and the sub-front wall 125 extending downward substantially along the box front wall 121 and the drawn wrap film 36 are prevented from returning onto the roll 30. And a flap 50 for separating the wrap film and its cutting edge 361 from the box front wall 121. As shown in FIG. 5, the lid body 20 includes two corresponding lid end walls 25. Further, the box front wall 121 includes a fixing portion 136 that can be fixed to the box end wall 123.

  The lid 20 includes an upper wall 21, a lid front wall 24, and a cutting blade 22 fixed 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-shape having a top 221 that is disposed adjacent to the lower outer surface of the box front wall 121 and protrudes downward when the lid 20 closes the opening 15 of the box body. The V-shaped top 221 of the cutting blade is located in the vicinity of the bisector 2 of the distance between the two facing lid end walls 25, 25.

  FIG. 4 shows a state in which the container 10 is held with the left hand 61 and the wrap film 36 is gripped and pulled out with the right hand 62. The flap 50 is disposed at a position including a bisector of the distance between the two opposing box end walls 123. Therefore, the dimension (width) of the wrap film between the box end wall 123 close to the user and the flap 50 (wrapping position of the wrap film), and the wrap film dimension between the box end wall 123 and the flap spaced apart from the user. Are almost equal. When the flap 50 is disposed at a position including the bisector of the distance between the two box end walls 123 facing each other, when the hand is reversed from FIG. 4, that is, the container 10 is held with the right hand 62 and wrapped with the left hand 61 Even when the film 36 is gripped and pulled out, the size (width) of the wrap film between the box end wall 123 and the flap 50 (wrapping position of the wrap film) close to the user and the box end wall 123 and the flap separated from the user are also included. Since the wrap film dimensions between 50 are approximately equal, the conventional difficulty of use does not occur.

  FIG. 6 is a schematic plan view showing the flap 50 of the wrap film apparatus 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 cutting edge 361 from the box front wall 121 is formed by leaving a part of the box front wall 121 as a sub-front wall 125 as shown in FIGS. It is formed by cutting and raising. The lower edge 51 of the flap 50 is separated from the box front wall 121 by the elastic force generated by the connecting portion 55. The flap 50 is disposed so as to include a bisector 2 of the distance between the two opposing box end walls 123. Further, the shape of the flap 50 may be such that the lower edge 51 is linear or curved. Specifically, the shape of the flap 50 may be a rectangle (square, rectangular) or a trapezoid with the flap connecting portion 55 and the lower edge 51 as an upper base or a lower base. Further, the central portion of the lower edge 51 may be a concave shape 52. In this case, since the wrap film placed on the concave shape 52 slightly falls from the flap surface, an effect of reducing “cutting edge” of the V-shaped top portion 221 of the cutting blade is produced. In addition, when pinching the film, the concave shape makes it easy to pinch the film. The concave 52 can have a U-shaped or V-shaped notch. The ratio W / H between the length W of the connecting portion of the flap 50 and the maximum height H of the flap is 0.5 to 10, preferably 1 to 6, and more preferably 2 to 5. When the length W of the connecting part of the flap is 2 or more with respect to the maximum height H of the flap, that is, the dimension perpendicular to the connecting part, the elastic force applied to the flap by the connecting part is large, and the lower edge of the flap Can be prevented from adhering to the front wall 121 of the box or not being sufficiently separated.

  Since the wrap film portion engaged with the concave shape 52 is positioned in the vicinity of the box front wall 121, it is avoided that the wrap film portion is pressed and damaged by the top portion 221 of the V-shaped cutting blade 22 that rotates outward. The pressure-sensitive adhesive layer 14 that prevents the drawn wrap film 36 from returning onto the roll 30 is disposed on the outer surface of the flap 50. Since the outer surface of the flap 50 is located at a position where the lower side is separated from the outer surface of the box front wall 121 and easily contacts the cutting edge of the wrap film 36, the adhesive layer on the outer surface of the flap 50 is pulled out. Securely adhere and hold the cutting edges of

  As shown in FIG. 1, FIG. 2A and FIG. 2B, the wrap film device 1 includes a sealing wall 23 that covers the cutting edge of the cutting blade 22 and is releasably secured to the box front wall 121. The sealing wall 23 is formed by an extension of the lid front wall 24 and is connected to the lid front wall 24 by a connecting portion 241 that can be easily broken. The connecting portion 241 has a V-shape separated from the blade edge 223 by a predetermined dimension so that the blade edge 223 of the cutting blade 22 is exposed when the sealing wall 23 is peeled from the box front wall 121. 2A and 2B, the sealing wall 23 is bonded to the box front wall 121 by a plurality of bonding portions 132 and 134. Each of the plurality of adhesive portions has a circular shape, and the distance between the centers of adjacent circular shapes is equal. Further, the area of the adhesive portion 134 that is close to the V-shaped top portion 221 of the cutting blade 22 is far from the top portion 221. It is possible to make the area smaller than the area of the adhesive portion 132 at the position.

  FIG. 8 is a schematic cross-sectional view including the bisector 2 of the wrap film apparatus of FIG. 2A with the lid 20 moved somewhat to the open position. As shown in FIG. 8, the V-shaped top 221 of the cutting blade 22 is rotated in front of the lid when the lid 20 is rotated by an angle R around the upper side 16 of the rear wall in a direction to open the opening 15 of the box body 12. The larger the vertical dimension S from the upper side 242 of the 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 “cutting edge contact” that presses and cuts the wrap film 36 from which the V-shaped top portion 221 of the cutting blade 22 is drawn.

  However, when the dimension S is increased in order to reduce the “per edge”, the vertical dimension T near the line 2 of the sealing wall 23 shown in FIG. 2B is decreased. The sealing wall 23 hides the blade edge 223 and needs to be peeled off from the surface of the box front wall 121 without being torn, and is securely adhered to the surface of the box front wall 121 before use of the wrap film device, and the cutting blade It is required to cover the blade edge 223. Therefore, the vertical dimension T near the bisector 2 of the sealing wall 23 needs to be a certain value or more, for example, 10 mm or more. In the present invention, as shown in FIG. 2, the area of the adhesive portions 134 and 134 located near the V-shaped top portion 221 of the cutting blade 22 is made smaller than the area of the adhesive portion 132 located far from the top portion 221. Can do.

In FIG. 8, when the V-shaped top portion 221 of the cutting blade 22 coincides with the flap lower edge 51 in the vertical direction, the top portion 221 does not press the flap 50. Assume that the maximum dimension H is on the bisector 2). In the wrap film apparatus of the present invention, the width of the upper wall 21, that is, the dimension between the rear wall upper side 16 and the lid front wall upper side 242 is A, the rotation angle of the upper wall 21 from the horizontal direction is R, and the lid front wall The dimension from the upper side 242 to the top 221 of the blade edge is S, the width of the opening 15, that is, the dimension between the rear wall upper side 16 and the bent part 55, and the maximum between the flap bent part 55 and the flap lower edge 51. When the dimension is H and the rotation angle from the vertical direction of the flap 50 is X, the rotation angles R and X each take a value within the range of the following expressions (1) and (2):
0 <R <45 ° (1)
0 <X <45 ° (2)
Dimensions A, B, S, and H are all over the lower edge of the flap.
S × cosR = A × sinR + H × cosX (3)
H × sinX ≦ (A × cosR + S × sinR) −B (4)
Dimensions A, B, S and H are selected to satisfy As an example, when X = 4 °, the angle at which the V-shaped top 221 of the cutting blade contacts the maximum dimension portion of the flap lower edge is R = 9 when A = 43 mm, B = 43 mm, S = 27 mm, and H = 20 mm. °. At that time, it can be seen from the calculation formula that H × sinX = 3.10 mm and (A × cosR + S × sinR) −B = 3.70 mm, which satisfies the relationship of the above formula. As a result, the above-described “cutting edge” of the wrap film apparatus can be prevented.

  The above equation (4) includes the case of H × sinX = (A × cosR + S × sinR) −B (4b), but in this case, the cutting edge 223 of the cutting blade is only in contact with the flap lower edge. Since the wrap film is not pressed, the flexible wrap film is not cut (damaged). In other words, there is virtually no “edge contact”. In the wrap film apparatus of the present invention, the flap is disposed so as to include a bisector of a distance between two opposing box end walls. Therefore, the dimension (width) of the wrap film between the box end wall and the flap (wrapping position of the wrap film) close to the user and the wrap film dimension between the box end wall and the flap that are separated from the user are approximately the same. equal. Therefore, it eliminates the inconvenience that occurs in either the left-handed person or the right-handed person when the flap is provided at a position separated from the bisector, and is used for both the right-handed person and the left-handed person. An easy wrap film apparatus can be provided.

  In the wrap film apparatus of the present invention, the lower edge of the flap has a concave portion. By taking such a configuration, it is possible to provide an improved wrap film apparatus that does not cause a problem that "per edge", that is, the wrap film is pressed by the vicinity of the top of the V-shaped cutting blade and the wrap film is cut. it can.

  In the wrap film apparatus of the present invention, an adhesive layer for preventing the drawn wrap film from returning onto the roll is disposed on the outer surface of the flap. Since the outer surface of the flap is spaced from the outer surface of the front wall of the box and is easily in contact with the wrap film and its cutting edge (edge), the adhesive layer on the outer surface of the flap There exists an effect which adheres and holds the edge of a film more certainly.

  In the wrap film apparatus of the present invention, the sealing wall is formed by an extension portion of the lid front wall and is connected to the lid front wall by a joint portion that is easily broken. The connecting portion has a V shape that is spaced from the cutting edge of the cutting blade by a predetermined dimension so that the cutting edge of the cutting blade is exposed when the sealing wall is peeled off from the front wall of the box. The sealing wall is bonded to the front wall of the box by a plurality of bonding portions, and the area of the bonding portion located near the V-shaped top of the cutting blade is smaller than the area of the bonding portion located far from the top. Therefore, the sealing wall hides the blade edge and can be peeled off from the surface of the box front wall without being torn, and is securely adhered to the surface of the box front wall before use of the wrap film apparatus, and the cutting blade The blade edge can be covered.

  In the present invention, the central portion of the lower edge of the flap is concave, and the ratio W / H between the length W of the flap connecting portion and the maximum height H of the flap is 2 or more. That is, when the dimension W of the flap connecting portion is 2 or more with respect to the maximum height H of the flap, that is, the dimension perpendicular to the connecting portion, the elastic force applied to the flap by the connecting portion is large. It is possible to prevent a disadvantage that the lower edge adheres to the box front wall 121 or does not sufficiently separate. Further, the wrap film portion engaged with the concave portion of the flap is located close to the front wall of the box and is prevented from being damaged by being pressed by the top of the V-shaped cutting blade that rotates outward.

The schematic perspective view before the start of use of the wrap film apparatus of one Example of this invention. 2A is a wrap film apparatus in a state where the sealing wall 23 of the wrap film apparatus of FIG. 1 is removed, and FIG. 2B is an elevational view of the sealing wall 23. FIG. The schematic perspective view which shows the state which has the cover body of the wrap film apparatus of FIG. 2A in an open position. FIG. 4 is a schematic perspective sectional view showing a state in which the wrap film is manually pulled out from the wrap film apparatus of FIG. 3. The schematic perspective view which expand | deploys and shows the box front wall and subfront wall of the wrap film apparatus of FIG. 2A. The schematic plan view which shows the flap part of the wrap film apparatus of this invention. The schematic perspective view of the flap part of FIG. 2B is a schematic cross-sectional view along bisector 2 of the wrap film device of FIG. 2A with the lid somewhat moved to the open position. FIG.

Explanation of symbols

1: wrap film apparatus, 2: 2 bisector, 10: container, 12: box body, 14: adhesive layer, 15: opening, 16: upper side of rear wall, 17: upper side of box front wall (folded part), 20: Lid, 21: Upper wall, 22: Cutting blade, 23: Sealing wall, 24: Front wall of lid, 25: End wall of lid, 30: Roll, 36: Wrap film, 50: Flap, 51: Under flap Edge, 52: concave part, 55: flap connecting part (upper side), 61: left hand, 62: right hand, 121: front wall of box, 122: rear wall, 123: end wall of box, 124: bottom wall, 125: secondary Front wall, 132, 134: Adhesive part, 136: Adhering part, 221: Top part, 223: Cutting edge, 241: Joint part, 242: Upper side of lid front wall, 361: Edge of wrap film, H: Maximum size of flap, W : The length of the connecting part of the flap.

Claims (5)

A wrap film apparatus that accommodates a roll (30) of a wrap film in a container (10) and enables the wrap film to be drawn 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 opposite box end walls (123), a box front wall upper side, a rear wall upper side, and the two A sub-front wall (125) having an opening (15) surrounded by the upper side of the box end wall, connected to the upper side of the box front wall and extending downward along the box front wall inside the box body, and a drawn wrap film (36) having a pressure-sensitive adhesive layer (14) for preventing the roll from returning onto the roll, and a flap (50) for separating the wrap film edge (361) from the front wall of the box,
The lid body has an upper wall (21), a lid front wall (24), and a cutting blade (22) fixed to the lid front wall, and the upper wall (21) is connected to the rear wall upper side (16), The cutting edge (223) of the cutting blade is V-shaped having a top (221) that is disposed adjacent to the lower outer surface of the front wall of the box and protrudes downward when the lid closes the opening;
The flap (50) is formed by cutting a part of the box front wall (121) so as to have a flap connecting part (55) connected to the sub-front wall, and opposing two box end walls (123, 123). 123) is arranged to include the bisector (2) of the distance between
The width of the upper wall (21), that is, the dimension between the rear wall upper side (16) and the lid front wall upper side (242) is A, the rotation angle of the upper wall (21) from the horizontal direction is R, and the lid front wall upper side The dimension from (242) to the top (221) of the blade edge 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, and the flap connecting part ( 55) and the lower edge of the flap (51) is H, and the rotation angle of the flap (50) from the vertical direction is X, the rotation angles R and X are respectively expressed by the following formula (1): And when taking a value in the range of (2)
0 <R <45 ° (1)
0 <X <45 ° (2)
In the whole area of the lower edge of the flap,
S × cosR = A × sinR + H × cosX (3)
H × sinX ≦ (A × cosR + S × sinR) −B (4)
Wrapping film device characterized by satisfying The box front wall (121) and the sub front wall (125) are made of a single cardboard, the box front wall upper side (17) is a bent portion of the cardboard, and the flap connecting portion (55) is the bent. The V-shaped top (221) of the cutting blade (22) is located near the bisector (2) of the distance between the two opposing box end walls (123, 123), The wrap film apparatus of claim 1, wherein the flap lower edge (51) has a concave portion (52). The wrap film apparatus according to claim 2, wherein the flap (50) is rotated from the front wall of the box by the rotation angle X by a restoring force of the bent portion (55). The wrap film apparatus 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 wrap film device according to any one of claims 1 to 4, further comprising a sealing wall (23) that covers the cutting edge (223) of the cutting blade and is releasably secured to the box front wall (121). The stop wall (23) is formed by an extension of the lid front wall (24) and is connected to the lid front wall by an easily breakable portion (241), and the sealing wall (23) is peeled off from the box front wall. When it is done, it adheres with a plurality of adhesion parts (132, 134) to the box front wall so that the blade edge (223) of the cutting blade is exposed, and the adhesion part (134 near the top part (221) of the cutting blade 5) is smaller than the area of the adhesive portion (132) at a position far from the top portion, the wrap film apparatus according to any one of claims 1 to 4.

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