JP3225485U - Opening ruled line structure of the package - Google Patents

Abstract

An object of the present invention is to provide a ruled line structure for opening a package, which can be opened without using a break line, and the lid flap is not easily broken at the time of opening. A packaging box (2) is sealed with a lid flap (24) adhered to an outer surface of the packaging box (2) with an adhesive (32). The adhesive 32 is applied so that the inner surface of the lid flap 24 and the outer surface of the packaging box 2 are bonded at a plurality of bonding portions 33 arranged at intervals in the left-right direction. The lid flap 24 is formed with a plurality of valley fold lines 26 extending between the bonding portions 33 at a plurality of locations and extending inclining with respect to the up-down direction and having a concave outer surface of the lid flap 24. When the lid flap 24 is peeled off from the outer surface of the packaging box 2 and the packaging box 2 is opened, the lid flap 24 is deformed along the valley fold line 26. [Selection diagram] FIG.

Description

  This invention relates to a ruled line structure for opening a package.

  2. Description of the Related Art In recent years, mail-order sales and auction services using the Internet (so-called online shopping and online auctions) have become widespread. In general, in online shopping and online auctions, products are stored in a packaging box formed of cardboard or the like and delivered to a purchaser of the product. The purchaser of the product opens the packaging box and takes out the product. As described above, with the recent spread of online shopping and online auctions, opportunities for general consumers to open packaging boxes by themselves are increasing.

  As a packaging box used as described above, the one described in FIG. 1 of Patent Document 1 is known. The packaging box of FIG. 1 of Patent Document 1 has a bottom plate, a body extending upward from the bottom plate, a cover plate closing an upper opening of the body, and a flap ruled line formed along a front edge of the cover plate. And a lid flap bent downward. The packaging box of Patent Literature 1 is sealed by bonding a lid flap to an outer surface of the packaging box with an adhesive. This adhesive is applied so that the inner surface of the lid flap and the outer surface of the packaging box are bonded at a plurality of bonding portions arranged at intervals in the left-right direction.

Utility Model Registration No. 3211067

  By the way, when opening the packaging box of Patent Literature 1, put a finger in the gap between the inner surface of the lid flap and the outer surface of the packaging box, lift the lower end of the lid flap, and peel off the lid flap from the outer surface of the packaging box. .

  Here, if the lid flap is to be peeled off simultaneously over the entire width in the left-right direction, a very large force is required. Therefore, first lift the left and right ends of the lid flap with a finger, peel off one end of the lid flap from the outer surface of the packaging box, and then move the position where the lid flap is lifted with the fingers to remove the lid flap. Is enlarged toward the other end in the left-right direction of the lid flap, whereby the entire lid flap is often peeled off from the outer surface of the packaging box.

  However, as described above, when the lid flap is peeled off at one end in the left-right direction, and thereafter, the range in which the lid flap is peeled off is expanded toward the other end in the left-right direction of the lid flap, the lid flap is moved halfway in the left-right direction. In some cases, the lid flap was torn from the lower end to the upper end. If the lid flap is torn in the middle in the left-right direction, it is necessary to restart the operation of peeling the lid flap from that position again, and the opening operation is complicated.

  FIG. 6 of Patent Document 1 shows a packaging box in which a break line (zipper, perforation, etc.) is formed on a lid flap adhered to the outer surface of the packaging box in order to facilitate opening of the packaging box. Have been. The breaking line is formed by extending a portion above each bonding portion of the lid flap from one end in the left-right direction of the lid flap to the other end.

  To open this packaging box, the portion below the breaking line of the lid flap is peeled off from the outer surface of the packaging box from one end in the left-right direction to the other end. Then, the lid flap is peeled off from the packaging box while being divided into two along the breaking line. Then, when the portion below the breaking line of the lid flap is completely peeled off from one end in the left-right direction of the lid flap to the other end, the lid flap has no adhesive portion to the outer surface of the packaging box, so the lid plate is It will be open. When a break line such as a zipper or a perforation is formed on the lid flap as in this packaging box, the opening operation of the packaging box becomes easy, but the part where the lid flap is cut off along the break line becomes an end material. In addition, there is a need to dispose of the scraps. For this reason, there has been a demand for an opening structure for facilitating opening of the packaging box without using a break line such as a zipper or a perforation.

  Therefore, an object of the present invention is to provide a ruled line structure for opening a package, which can be opened without using a break line and the lid flap is not easily broken at the time of opening.

In order to solve the above-mentioned problems, the present invention provides a ruled line structure for opening a package having the following configuration.
A lid flap that is adhered to an outer surface of the package with an adhesive to seal the package,
The adhesive is applied so as to adhere the inner surface of the lid flap and the outer surface of the package at a plurality of bonding portions arranged at intervals in the left-right direction,
In the lid flap, a plurality of valley fold lines are formed extending between the bonding portions at the plurality of locations and inclined in the vertical direction,
An opening ruled line structure for a package wherein the lid flap is deformed along the valley fold line when the lid flap is peeled off from the outer surface of the package to open the package.

  With this configuration, when the lid flap is peeled off from the outer surface of the package, the lid flap is deformed along the valley fold line, so that the lid flap is not easily broken. That is, when one end in the left-right direction of the lid flap is peeled off from the outer surface of the package, and then the range in which the lid flap is peeled off is expanded from one end in the left-right direction to the other end of the lid flap, It deforms along the fold line, and the non-adhesive part of the lid flap rises. Here, since the valley fold line extends obliquely with respect to the vertical direction, the deformation of the lid flap is guided such that the floating range of the non-adhesive portion becomes a relatively wide range extending obliquely with respect to the vertical direction. Therefore, it is difficult for the shearing force to concentrate on one portion of the lid flap in the left-right direction. For this reason, it is possible to prevent the lid flap from tearing from the lower end to the upper end of the lid flap halfway in the left-right direction during opening. Further, it is possible to open the package without using a break line.

On the upper edge of the lid flap, a flap ruled line in which the inner surface side of the lid flap is depressed is formed,
It is preferable that the plurality of valley fold lines are formed to vertically traverse the lid flap so as to connect the flap ruled line and the lower end of the lid flap.

  In this case, since the valley fold line is formed vertically across the lid flap, when the lid flap is peeled off from the outer surface of the package, the floating range of the non-adhesive portion of the lid flap is in the vertical direction. It is possible to reliably induce the deformation of the lid flap so as to have a relatively wide range extending obliquely.

  The plurality of valley fold lines are preferably formed in a straight line extending parallel to each other.

  In this manner, the plurality of valley fold lines are parallel to each other and are inclined in the same direction, so that one adhesive portion is peeled off, and when the same portion of the lid flap is lifted, the bonding of the raised portion is performed. The lid flap is further deformed along the valley fold line adjacent to the part. This deformation further facilitates peeling of the adjacent bonding portion. As described above, when the lid flap is pulled up, each of the bonded portions is likely to be continuously peeled off in order from the bonded portion closer to the raised position. For this reason, it becomes easy to pull up the lid flap and to peel off the lid flap from the package at a stretch.

  The plurality of valley fold lines are preferably formed in a straight line extending in parallel to each other in the same direction with respect to the up-down direction in the entire region from one end to the other end in the left-right direction of the lid flap. .

  With this configuration, when the lid flap is pulled up, the adhesive portions are likely to be continuously peeled over the entire region from one end to the other end in the left-right direction of the lid flap. For this reason, the lid flap can be more easily peeled off from the package at a stretch.

  It is preferable that a substantially rhombic valley fold line non-forming portion is formed between the parallel valley fold lines adjacent to each other in the left-right direction.

  With this configuration, when the lid flap is pulled up, the substantially rhombus-shaped valley fold line-free portion of the lid flap rises. Since the valley fold line non-formed portion has a substantially rhombic shape, the range in which the lid flap rises is wider, and the lid flap is easily peeled off from the outer surface of the package.

  The plurality of valley fold lines are preferably inclined at an inclination angle of 30 ° to 65 ° with respect to the vertical direction.

  With this configuration, when the lid flap is peeled off, the lid flap is deformed along a valley fold line inclined by 30 ° to 65 ° with respect to the vertical direction, so that the floating range of the non-adhesive portion of the lid flap is limited to the left and right direction. Relatively wide. For this reason, the lid flap is easily peeled off from the package, and the package is more easily opened.

  The valley fold line may be an inverted ruled line in which the outer surface of the lid flap is depressed.

Further comprising a lid plate closing the upper opening of the package,
The lid flap is provided on the lid plate via the flap ruled line so that an upper edge of the lid flap overlaps a front edge of the lid plate, and is folded downward along the flap ruled line. can do.

  The lid flap may be formed of cardboard. Here, when the step direction of the lid flap is the up-down direction, a problem that the lid flap is particularly likely to be broken in the middle in the left-right direction is likely to occur, but by applying the above-described invention, the lid is opened when the package is opened. It is possible to effectively prevent the flap from tearing from the lower end to the upper end of the lid flap halfway in the left-right direction.

  In the opening ruled line structure of the package of the present invention, the lid flap is deformed along the valley fold line when the lid flap is peeled off from the outer surface of the package, so that the lid flap is not easily broken. That is, when one end in the left-right direction of the lid flap is peeled off from the outer surface of the package, and then the range in which the lid flap is peeled off is expanded from one end in the left-right direction to the other end of the lid flap, It deforms along the fold line, and the non-adhesive part of the lid flap rises. Here, since the valley fold line extends obliquely with respect to the vertical direction, the deformation of the lid flap is guided such that the floating range of the non-adhesive portion becomes a relatively wide range extending obliquely with respect to the vertical direction. Therefore, it is difficult for the shearing force to concentrate on one portion of the lid flap in the left-right direction. For this reason, it is possible to prevent the lid flap from tearing from the lower end to the upper end of the lid flap halfway in the left-right direction during opening. Further, it is possible to open the package without using a break line.

View of the packaging box blank of the embodiment of the present invention viewed from the front liner side The view of the blank of the lid of the embodiment of the present invention viewed from the front liner side Enlarged view showing the vicinity of a blank lid flap of the lid shown in FIG. FIG. 3 is an enlarged view showing the vicinity of a raised portion formed on the lid flap shown in FIG. FIG. 2 is a perspective view showing a packaging box obtained by assembling the blank shown in FIG. 1 and a blank of a lid shown in FIG. 2. The perspective view which shows the state which sealed the packaging box shown in FIG. The perspective view which shows the state which opened the packaging box shown in FIG. Enlarged view showing the vicinity of the lid flap of the packaging box shown in FIG. FIG. 6 is a perspective view showing a state in which a lifting portion of the lid flap shown in FIG. 6 is pulled up. The perspective view which shows the state in the middle of opening of the packaging box shown in FIG. The perspective view which shows the state in the middle of opening of the packaging box shown in FIG. Enlarged view showing the lid flap when the valley fold line has a bow shape Figure of the blank of the wraparound case seen from the front liner side when the wraparound case is used as the packaging box of this invention An enlarged view showing the vicinity of the blank lid flap shown in FIG. A perspective view showing a packaging box obtained by assembling the blank shown in FIG.

  Hereinafter, an opening ruled line structure (hereinafter, simply referred to as “opening ruled line structure”) of a package according to an embodiment of the present invention will be described with reference to the drawings. The package of this embodiment is a rectangular parallelepiped packaging box formed from the blank 4 shown in FIG.

  FIG. 1 shows a blank 4 of the packaging box 2, and FIG. 2 shows a blank 5 of the lid 3. The blanks 4 and 5 are formed of corrugated cardboard having a front liner, a back liner, and a corrugated center line sandwiched between the front liner and the back liner. 1 is a view of the blank 4 and FIG. 2 is a view of the blank 5 from the front liner side.

  As shown in FIG. 1, the blank 4 includes a rectangular bottom plate 7, a pair of left and right side plates 8, a pair of left and right flaps 16, a front plate 10, and a rear plate 11. A left side plate 8 is connected to a left edge of the bottom plate 7 via a ruled line 12, and a left flap 16 is connected to a left edge of the side plate 8 via a ruled line 14. Similarly, a right side plate 8 is connected to a right edge of the bottom plate 7 via a ruled line 12, and a right flap 16 is connected to a right edge of the side plate 8 via a ruled line 14.

  The front plate 10 is connected to the front edge of the bottom plate 7 via a ruled line 13. The rear plate 11 is connected to the rear edge of the bottom plate 7 via a ruled line 13. On the left and right side edges of the front plate 10 and the rear plate 11, an in-folded face plate 17 is continuously provided via a ruled line 15.

  The side plate 8, the front plate 10, and the rear plate 11 are parts that constitute the trunk 20 (see FIG. 5) of the packaging box 2 when the blank 4 is assembled. At this time, the front liner of the blank 4 constitutes the outer peripheral surface of the trunk 20 of the packaging box 2, and the back liner constitutes the inner peripheral surface of the trunk 20 of the packaging box 2.

  As shown in FIG. 2, the blank 5 of the lid 3 includes a rectangular lid plate 22 and lid flaps 24 and 25 connected to the front edge and the rear edge of the lid plate 22 via flap ruled lines 23 respectively. Having. The step direction of the cover plate 22 is a front-back direction (a direction from one of the pair of cover flaps 24 and 25 to the other). The flap ruled line 23 extends from one end of the blank 5 in the left-right direction toward the other end. The flap ruled line 23 is formed such that the inner surfaces of the lid flaps 24 and 25 are depressed when the lid 3 is assembled as shown in FIG. That is, the flap ruled line 23 is formed so that the back liner side of the blank 5 is depressed.

  The flap ruled line 23 is formed along the upper edge of the lid flap 24 when the lid 3 is assembled as shown in FIG.

  As shown in FIGS. 2 and 3, a plurality of valley fold lines 26 are formed on the lid flap 24. In this embodiment, each valley fold line 26 is a groove-shaped reverse ruled line in which the side of the outer surface of the lid flap 24 (the side of the front liner of the blank 5) is depressed when the lid 3 is assembled as shown in FIG. Is adopted. Each valley fold line 26 vertically crosses the lid flap 24 so as to connect the flap ruled line 23 and the lower end of the lid flap 24. Each valley fold line 26 is formed in a straight line parallel to each other over the entire region from one end to the other end of the lid flap 24 in the left-right direction. The valley fold lines 26 are arranged at equal intervals from one end to the other end of the lid flap 24 in the left-right direction. The interval L2 between adjacent valley fold lines 26 is 10% to 20% of the length L4 from one end to the other end in the left-right direction of the lid flap 24.

  Each valley fold line 26 is inclined at an inclination angle θ with respect to the up-down direction so as to descend rightward. That is, the valley fold line 26 has an inclination angle θ between the imaginary line A extending along the step direction of the lid flap 24. Is between 30 ° and 65 ° (preferably between 45 ° and 60 °).

  As shown in FIG. 3, valley fold line non-forming portions 27 are formed between adjacent valley fold lines 26. The valley fold line non-forming portion 27 is an area where the valley fold line 26 is not formed and is separated by the flap ruled line 23, the lower end of the lid flap 24, and the adjacent valley fold line 26. The valley fold line non-forming portion 27 is formed so as to vertically cross the lid flap 24 from the flap ruled line 23 to the lower end of the lid flap 24. The valley fold line non-forming portion 27 has a substantially rhombic shape. Here, the substantially rhombic shape refers to a parallelogram in which the lengths of two adjacent sides are the same or substantially equal. The length L3 of the valley fold line 26 is set to a value of 90% to 130% (preferably 100% to 120%) of the interval L2 between the adjacent valley fold lines 26.

  As shown in FIGS. 3 and 4, a pulling-up portion 28 for pulling up the lid flap 24 is formed between the lower end of the lid flap 24 and one end (left end in the figure) of the lid flap 24 in the left-right direction. . The lifting section 28 has ruled lines 29, 30, 31 arranged at equal intervals. The ruled lines 29, 30, 31 are formed so that the outer surface of the lid flap 24 is depressed. That is, the ruled lines 29, 30, and 31 are formed so that the front liner side of the blank 5 is depressed. The ruled lines 29, 30, 31 are formed in a straight line that is inclined with respect to the vertical direction so as to be parallel to the valley fold line 26. The edge of the lifting portion 28, that is, the edge between the lower end of the lid flap 24 and one end (left end in the figure) of the lid flap 24 in the left-right direction is formed in an arc shape.

  The blank 4 shown in FIG. 1 can be assembled, for example, as follows.

  Each of the pair of side plates 8 is bent along the ruled line 12. Further, each in-folded face plate 17 is bent along the ruled line 15, and in this state, the front plate 10 and the rear plate 11 are bent along the ruled line 13. At this time, the outer surface of the inner folding face plate 17 (the surface of the inner folding face plate 17 on the front liner side) overlaps the inner surface of the side plate 8 (the surface of the side plate 8 on the back liner side). Then, each of the side plate 8, the front plate 10, and the rear plate 11 is in a state of rising from the bottom plate 7. Next, the outer surface of each of the inner folding face plates 17 is bonded to the inner surface of the side plate 8 to form the body portion 20. Next, the flap 16 is bent along the ruled line 14 toward the inside of the trunk 20.

  As described above, the blank 4 is assembled, and the packaging box 2 shown in FIG. 5 is formed. In a state where the packaging box 2 is assembled, the side plate 8 is bridged between the side edge of the front plate 10 and the side edge of the rear plate 11 so as to connect the front plate 10 and the rear plate 11. . In this state, the left and right side plates 8 face each other. The front plate 10 and the rear plate 11 face each other. The bottom plate 7 closes the lower end of the body 20. The upper end of the trunk 20 is open.

  The packaging box 2 can be sealed, for example, as follows.

  The lid 3 is arranged so as to close the upper opening of the body 20. That is, the cover plate 22 is arranged on the flap 16 such that the cover plate 22 is bridged between the upper edge of the front plate 10 and the upper edge of the rear plate 11. At this time, the upper edge of the front panel 10 and the flap ruled line 23 overlap, and the upper edge of the rear panel 11 and the flap ruled line 23 overlap. In this state, the lid flaps 24 and 25 each extend outside the side plate 8. At this time, the adhesive 32 is applied to the inner surfaces of the lid flaps 24 and 25.

  Next, the lid flaps 24 and 25 are bent downward along the flap ruled lines 23, respectively. The inner surface of the folded lid flap 24 overlaps the outer surface of the front plate 10, and the lid flap 24 is adhered to the front plate 10 by the adhesive 32. Similarly, the inner surface of the folded lid flap 25 overlaps the outer surface of the rear plate 11, and the lid flap 25 is adhered to the rear plate 11 by the adhesive 32.

  Thus, as shown in FIG. 6, the packaging box 2 and the lid 3 are adhered to each other, and the packaging box 2 is sealed. As shown in FIG. 7, the packaging box 2 can be opened by peeling off the lid flap 24 from the front plate 10.

  Here, as shown in FIG. 8, the adhesive 32 is applied to the bonding portions 33 at a plurality of locations. The plurality of bonding portions 33 are arranged at equal intervals in the left-right direction. Each bonding portion 33 is provided between the valley fold lines 26 adjacent in the left-right direction. That is, each bonding portion 33 is provided so as to overlap with each of the valley fold line non-forming portions 27 adjacent in the left-right direction. The bonding portions 33 are provided so as not to overlap the valley fold lines 26, respectively. Thus, in a state where the inner surface of the lid flap 24 is adhered to the outer surface of the packaging box 2, the plurality of valley fold lines 26 extend vertically between the adhesive portions 33 adjacent to each other in the left-right direction. .

  The bonding portion 33 is applied below the center from the flap ruled line 23 to the lower end of the lid flap 24. The distance L8 from the lower end of the lid flap 24 to the bonding portion 33 is 10% to 30% of the length in the vertical direction of the lid flap 24 (that is, the length from the upper edge of the lid flap 24 to the lower end of the lid flap 24) L1. % (Preferably, 15% to 25%). The length L6 in the left-right direction of the bonding portions 33a located at both ends in the left-right direction of each bonding portion 33 is shorter than the length L7 in the left-right direction of the other bonding portions 33. The length L7 of the other bonding portions 33 in the left-right direction is set to a value of 30% to 45% of the interval L2 between the adjacent valley fold lines 26. The length L6 in the left-right direction of the bonding portions 33a located at both ends in the left-right direction is set to a value of 40% to 60% of the length L7 in the left-right direction of the other bonding portions 33. Note that a hot melt adhesive can be used as the adhesive 32.

  Next, opening of the packaging box 2 will be described with reference to FIGS.

  First, as shown in FIG. 9, the pull-up portion 28 for opening the lid flap 24 is grasped, the lid flap 24 is pulled upward, and one end (left end in the figure) of the lid flap 24 in the left-right direction is placed on the packaging box 2. Peel off from the outer surface.

  Next, as shown in FIG. 10, while shifting the position where the lid flap 24 is lifted, the range in which the lid flap 24 is peeled is changed from one end (left end in the figure) of the lid flap 24 in the left-right direction to the other end (right end in the figure). Expand towards. At this time, the lid flap 24 is deformed along the valley fold line 26, and the non-adhered portion of the lid flap 24 rises.

  Here, since the valley fold line 26 extends obliquely with respect to the vertical direction, as shown in FIG. 11, when the non-adhesive portion of the lid flap 24 rises, a fold line 34 extending in the vertical direction is formed on the lid flap 24. Is done. The fold line 34 is formed at a position on the left side of the bonding portion 33. When the non-adhesive portion rises, the lid flap 24 bends along the fold line 34. Therefore, the deformation of the lid flap 24 is changed so that the floating range of the non-adhesive portion becomes a relatively wide range extending inclining with respect to the vertical direction. Is induced, and it becomes difficult for the shearing force to concentrate on one portion of the lid flap 24 in the left-right direction.

  Therefore, at the time of opening, the lid flap 24 can be prevented from being torn from the lower end to the upper end of the lid flap 24 halfway in the left-right direction. Further, it is possible to open the package without using a break line.

  Here, as described above, the plurality of valley fold lines 26 are formed to vertically traverse the lid flap 24 so as to connect the flap ruled line 23 and the lower end of the lid flap 24, respectively. For this reason, when the lid flap 24 is peeled off from the outer surface of the packaging box 2, the range in which the non-adhesive portion of the lid flap 24 rises is a relatively wide range extending inclining with respect to the vertical direction. 24 can be reliably induced.

  Further, as described above, since the plurality of valley fold lines 26 are parallel to each other and are inclined in the same direction, as shown in FIG. Is lifted, the lid flap 24 is further deformed along the valley fold line 26 adjacent to the bonding portion 33 at the raised position. This deformation makes it easier for the adjacent bonding portion 33 to peel off. As described above, when the lid flap 24 is pulled up, each of the bonding portions 33 is likely to be peeled off successively in order from the bonding portion 33 which is closer to the raised position. For this reason, the lid flap 24 is pulled up, and the lid flap 24 is easily pulled off from the packaging box 2 at a stretch.

  Further, as described above, the plurality of valley fold lines 26 are parallel to each other and are inclined in the same direction in the entire region from one end to the other end of the lid flap 24 in the left-right direction. All the adhesive parts 33 from to the other end are easily peeled continuously in the order close to the raised position. For this reason, the lid flap 24 can be more easily peeled off from the packaging box 2 at a stretch.

  As described above, the lid flap 24 is formed with the substantially rhombic valley fold line non-forming portion 27 between the parallel valley fold lines 26 adjacent to each other in the left-right direction. Therefore, when the lid flap 24 is pulled up, the substantially rhombus-shaped valley fold line non-formed portion 27 of the lid flap 24 rises. Since the valley fold line non-formed portion 27 has a substantially rhombic shape, the range in which the lid flap 24 rises is wider, and the lid flap 24 is easily peeled off from the outer surface of the packaging box 2.

  Further, as described above, each valley fold line 26 is inclined at an inclination angle (θ) of 30 ° to 65 ° with respect to the vertical direction. For this reason, when the lid flap 24 is peeled off, the lid flap 24 is deformed along the valley fold line 26 inclined 30 ° to 65 ° with respect to the vertical direction, and the range in which the non-adhered portion of the lid flap 24 rises is Relatively wide in the direction. Therefore, the lid flap 24 is easily peeled off from the packaging box 2, and the packaging box 2 is more easily opened.

  The lid flap 24 has a rectangular shape elongated in the left-right direction. For this reason, the area of the lid flap 24 for bonding the lid plate 22 to the outer surface of the packaging box 2 can be suppressed while ensuring the openability of the lid flap 24.

  Here, since the step direction of the lid flap 24 is the vertical direction, a problem that the lid flap 24 is particularly likely to be torn in the middle in the left-right direction easily occurs. However, by applying the above-described invention, when the packaging box 2 is opened, The lid flap 24 can be effectively prevented from being torn from the lower end to the upper end of the lid flap halfway in the left-right direction.

  In the above embodiment, a plurality of valley fold lines 26 are formed only on the lid flap 24 among the lid flaps 24 and 25. However, the lid flap 25 can also form a plurality of valley fold lines 26, similarly to the lid flap 24. In this case, the adhesive 32 is applied to the inner surface of the lid flap 25 at an adhesive portion 33 provided between the adjacent valley fold lines 26 so as not to overlap the valley fold line 26 formed on the lid flap 25. And the outer surface of the packaging box 2 is adhered.

  Although the plurality of valley fold lines 26 in the above embodiment are formed in straight lines parallel to each other, they may be formed in a bow shape as shown in FIG. In this case, the valley fold line 26 is formed so as to inflate toward the lower left in the figure while being inclined downward to the right in the entire region from one end to the other end of the lid flap 24 in the left-right direction. A valley fold line non-forming portion 27 is formed between the adjacent valley fold lines 26. The length of the valley fold line 26 is set to a value of 90% to 130% (preferably 100% to 120%) of the interval L2 between the adjacent valley fold lines 26.

  In the above embodiment, the blank 4 of the packaging box 2 and the blank 5 of the lid 3 are formed of corrugated cardboard. However, the blank 4 of the packaging box 2 and the blank 5 of the lid 3 can be formed of a thick paper such as an interleaving paper in which flat paperboards are bonded.

  The valley fold line 26 may be a half-cut line cut from the back liner side to the middle of the middle shin, in addition to the inverted ruled line in which the outer surface of the lid flap 24 is depressed. Alternatively, even if a regular ruled line in which the back liner side is depressed or a lead ruled line in which the regular ruled line and the line by full cutting are alternately arranged, the valley fold line (that is, the lid flap 24 is oriented in a direction in which the outer surface of the lid flap 24 is concave) Any line type can be used as long as it functions as a line that induces deformation of the lid flap 24 so as to bend.

  Further, in the above-described embodiment, the example in which the plurality of valley fold lines 26 are formed in parallel to each other in an entire region from one end to the other end in the left-right direction of the lid flap 24 has been described. The plurality of valley fold lines 26 are formed such that the valley fold lines 26 formed on the left portion of the lid flap 24 are linearly inclined to the right and extend parallel to each other, and are formed on the right portion of the lid flap 24. The valley fold lines 26 may be formed in the form of straight lines extending downward and extending parallel to each other. By doing so, the lid flap 24 can be easily peeled off from either the left or right side.

  In the above-described embodiment, the packaging box 2 of the present invention has been described by taking as an example a so-called tray-type cardboard box including the bottom plate 7 and the body 20 extending upward from the bottom plate 7. Any other type of packaging box (for example, a wraparound case, a so-called B-type box, or a subdivision in which a plurality of trays are arranged for one lid, as long as it has a body 20 extending upward from the bottom plate 7) Packaging etc.) can be adopted.

  Further, in the above embodiment, the upper edge of the rear plate 11 and the rear edge of the lid plate 22 are separated from each other, and the packaging box 2 and the lid 3 are separated from each other, and a two-piece cardboard box is described as an example. However, the upper edge of the rear plate 11 and the rear edge of the lid plate 22 are connected via a ruled line, and a cardboard box integrated with a lid in which the packaging box 2 and the lid 3 are integrated can be adopted.

  In the above-described embodiment, the rectangular parallelepiped packaging box 2 has been described as an example. However, the packaging box 2 has a hexagonal column shape having a hexagonal bottom plate 7 or an octagonal column shape having an octagonal bottom plate 7. Things.

  FIG. 13 shows a packaging box 2 in which a wrap-around case is employed. The blank 35 of the packaging box 2 is formed of a cardboard having a front liner, a back liner, and a corrugated middle pin sandwiched between the front liner and the back liner. FIG. 13 is a view of the blank 35 as viewed from the front liner side.

  In the blank 35, the front plate 10, the bottom plate 7, the rear plate 11, and the lid plate 22 are sequentially provided via a ruled line 38. The ruled line 38 is a fold line extending in a direction perpendicular to the step of the cardboard. End flaps 37 are provided on both sides in the left-right direction of the front plate 10, the bottom plate 7, the rear plate 11, and the lid plate 22 via ruled lines 39. The end flap 37 provided on the front plate 10, the end flap 37 provided on the bottom plate 7, the end flap 37 provided on the rear plate 11, and the end flap 37 provided on the lid plate 22 all have the same length. And the leading edge of each end flap 37 is located on the same straight line. The end flaps 37 connected to the bottom plate 7 and the lid plate 22 constitute side plates 8 when the packaging box 2 is assembled, as shown in FIG. The side plate 8, the front plate 10, and the rear plate 11 constitute a trunk 20 of the packaging box 2.

  As shown in FIG. 14, a lid flap 24 is continuously provided on the lid plate 22 via a flap ruled line 23 formed on the front edge of the lid plate 22. The flap ruled line 23 extends from one end of the blank 35 in the left-right direction to the other end. The flap ruled line 23 is formed such that the inner surface side of the lid flap 24 is depressed when the packaging box 2 is assembled as shown in FIG. That is, the flap ruled line 23 is formed such that the back liner side of the blank 35 is depressed.

  The blank 35 shown in FIG. 14 can be assembled as follows, for example.

  The blank 35 is arranged so that the back liner faces the upper surface, and a product (not shown) is placed on the bottom plate 7. Then, the product is wrapped by a front plate 10 bent upward with respect to the bottom plate 7, a rear plate 11, and a lid plate 22 bent horizontally along the upper edge of the rear plate 11, and the lid flap 24 is flapped. It is bent downward along the ruled line 23, and the inner surface of the lid flap 24 is bonded to the outer surface of the front plate 10 to form a cylindrical body. After that, when both ends of the cylindrical body are closed and bonded by the respective end flaps 37, as shown in FIG. 15, the packaging box 2 in which goods are stored is obtained. At this time, the side plate 8, the front plate 10, and the rear plate 11 constitute a trunk 20 extending upward from the bottom plate 7 of the packaging box 2, and a lid flap 24 is adhered to an outer surface of the trunk 20. The end flaps 37 connected to the front plate 10 and the rear plate 11 constitute inner flaps, and the end flaps 37 provided to the bottom plate 7 and the cover plate 22 constitute outer flaps.

  Further, in the above-described embodiment, an example is described in which a packaging box is employed as the packaging body to which the lid flap 24 is adhered. However, the present invention is also applied to a packaging body other than the packaging box, such as an envelope-type packaging body. be able to. When applied to an envelope-type package, the package is, for example, three sides of a square-shaped front side sheet and a back side sheet that are arranged facing each other on the front and back are connected to each other, and the remaining one side located at the upper end of the package is An open configuration can be employed. In this case, the lid flap 24 may be continuously connected to the upper edge of the front sheet via the flap ruled line 23. The lid flap 24 is bent downward along the flap ruled line 23 and adhered to the outer surface (back sheet) of the package with an adhesive 32.

2 Packaging Box 7 Bottom Plate 8 Side Plate 10 Front Plate 11 Back Plate 20 Body 22 Cover Plate 23 Flap Ruled Line 24 Cover Flap 26 Valley Fold Line 27 Valley Fold Line Non-Formation Section 32 Adhesive 33 Adhesion Section θ Tilt Angle

Claims (9)

A lid flap (24) bonded to the outer surface of the package (2) with an adhesive (32) to seal the package (2);
The adhesive (32) is applied so as to adhere the inner surface of the lid flap (24) and the outer surface of the package (2) at a plurality of adhesive portions (33) arranged at intervals in the left-right direction,
The lid flap (24) is formed with a plurality of valley fold lines (26) extending between the plurality of bonding portions (33) and extending inclining with respect to the vertical direction,
When the lid flap (24) is peeled off from the outer surface of the package (2) to open the package (2), the lid flap (24) is deformed along the valley fold line (26). Opening ruled line structure for wrapped packages. On the upper edge of the lid flap (24), a flap ruled line (23) is formed in which the inner surface side of the lid flap (24) is depressed,
The plurality of valley fold lines (26) are formed to vertically traverse the lid flap (24) so as to connect the flap ruled line (23) and the lower end of the lid flap (24). A ruled line structure for opening a package according to claim 1.   The ruled line structure for opening a package according to claim 1 or 2, wherein the plurality of valley fold lines (26) are formed in a linear shape extending in parallel with each other.   The plurality of valley fold lines (26) are formed in straight lines extending in the same direction with respect to the vertical direction and extending parallel to each other in the entire region from one end to the other end in the left-right direction of the lid flap (24). The ruled line structure for opening a package according to claim 3, which is formed.   The ruled line structure for opening a package according to claim 3 or 4, wherein a substantially rhombic valley fold line non-forming portion (27) is formed between the parallel valley fold lines (26) adjacent to each other in the left-right direction. .   The opening ruled line for a package according to any one of claims 3 to 5, wherein the plurality of valley fold lines (26) are each inclined at an inclination angle (θ) of 30 ° to 65 ° with respect to the vertical direction. Construction.   The ruled line structure for opening a package according to any one of claims 1 to 6, wherein the valley fold line (26) is an inverted ruled line in which an outer surface of the lid flap (24) is depressed. A lid plate (22) for closing an upper opening of the package (2);
The lid flap (24) is provided on the lid plate (22) via the flap ruled line (23) such that an upper edge of the lid flap (24) overlaps a front edge of the lid plate (22). 8. The ruled line structure for opening a package according to any one of claims 2 to 7, which is bent downward along the flap ruled line (23).   The ruled line structure for opening a package according to any one of claims 1 to 8, wherein the lid flap (24) is formed of cardboard, and a step direction of the lid flap (24) is a vertical direction.

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