JP3208918U - Cardboard box sheet - Google Patents

Abstract

To provide a sheet for a corrugated cardboard box, which can relatively easily peel the end of an adhesive tape when the cardboard box is opened. A corrugated cardboard box having two pairs of side panels and a pair of flaps that extend from the upper edges of the pair of side panels and that have their front end edges butted in a sealed state. A central break line 14 that extends in the vertical direction in the vicinity of the upper edge of at least one of the other pair of side panels on which the end of the adhesive tape T is located and in the center in the left-right direction, and is easily broken. A pair of proximal fold lines 15 that extend substantially symmetrically on both sides of the central break line and substantially parallel to the central break line, and are easily formed, and an upper end of the central break line and an upper end of the proximal break line Are connected in advance, and the lower cutting line 17 is formed in advance so that it can be easily cut or cut. And have. [Selection] Figure 3

Description

  The present invention relates to a cardboard box sheet.

  Corrugated cardboard boxes formed from corrugated cardboard sheets are widely used as packing materials for various articles. Among them, the four side panels are connected in a square tube shape, and the pair of upper and lower flaps extending from the upper and lower edges of the pair of side panels on the long side are folded so as to face each other, thereby An A-type (so-called citrus box type) cardboard box that seals the openings at both ends is most frequently used. Such an A-type cardboard box is generally sealed by sticking an adhesive tape so as to cover the flap seam.

  As a relatively simple method for opening a corrugated cardboard box sealed with an adhesive tape in this way, there is a method of cutting the adhesive tape along a flap joint with a cutter knife. However, when a cutter knife is used, the tip of the cutter knife may inadvertently damage an article stored in the cardboard box. For this reason, the method of opening by peeling off an adhesive tape from a corrugated cardboard sheet | seat is often employ | adopted.

  In order to peel off the adhesive tape attached to the cardboard box, it is necessary to peel the adhesive tape by placing a fingernail on the longitudinal end of the adhesive tape so that one end of the adhesive tape can be firmly gripped. However, the work of peeling off the end of the adhesive tape is not easy, and the working efficiency is remarkably lowered.

  Therefore, there is a method for defining a foldable tongue piece by forming a U-shaped cutting line and a folding line connecting the upper ends of both sides of the cutting line in a region where the end of the adhesive tape of the cardboard box is attached. It has been proposed (see Japanese Patent Application Laid-Open No. 2003-72748). In the configuration described in this publication, by bending the tongue piece so as to be pushed into the inside of the cardboard box, the tongue piece can be peeled off from the adhesive tape and the end of the adhesive tape can be gripped.

  In the configuration described in the above publication, it is necessary to start peeling of the adhesive tape simultaneously over the entire width of the tongue side in order to advance peeling in a direction perpendicular to the edge of the adhesive tape. In order to facilitate the start of peeling of the adhesive tape, it is effective to reduce the width of the tongue side. However, in this configuration, since it is necessary to increase the width of the tongue piece in order to firmly hold the end of the adhesive tape, a relatively large force is required to push the tongue piece and peel the adhesive tape. Is required.

Japanese Patent Laid-Open No. 2003-72748

  In view of the above inconveniences, an object of the present invention is to provide a cardboard box sheet that can relatively easily peel the end of the adhesive tape when the cardboard box is opened.

  The invention made in order to solve the above-mentioned problem is formed by one corrugated cardboard sheet, and two pairs of side panels connected alternately in the left-right direction, and extended from the upper edges of the pair of side panels. A sheet for a cardboard box comprising a pair of flaps whose leading edges are butted in a state, extending in the vertical direction in the vicinity of the upper edge of the other side panel and in the center in the left-right direction and breaking. A center break line that is easily formed, a pair of proximal fold lines that extend substantially parallel to and parallel to the center break line on both sides of the center break line, and the center break line that is easily formed The upper end of the base end fold line is connected to the upper end of the base end fold line, and the upper end cut line that is easily cut or cut in advance is connected to the lower end of the central break line and the lower end of the base end fold line. Or formed easily cut And having a lower cut line that.

  The corrugated cardboard box formed by assembling the corrugated cardboard box sheet has a pair of tongues defined substantially symmetrically in the left-right direction across the central break line by the central break line, the upper cut line, the lower cut line, and the proximal folding line. It is sealed by sticking an adhesive tape over the top of the pair of tongue pieces. This cardboard box peels off the pair of tongue pieces from the adhesive tape by pushing the pair of tongue pieces into the inside of the cardboard box from the center breaking line side so as to open the doors along the pair of proximal fold lines. can do. Since the corrugated cardboard sheet has elasticity, the force that first peels off the tongue piece acts locally by concentrating on the part of the edge of the adhesive tape on the central break line, and it is relatively easy to remove the edge of the adhesive tape from the corrugated cardboard sheet. Can be peeled off.

  Preferably, the central break line is longer than the proximal fold line, and the vertical positions of the lower ends of the central break line and the proximal fold line are substantially equal. According to this configuration, since the upper cutting line is inclined outward and downward, a convex opening is formed when the pair of tongue pieces are pushed in. For this reason, it is possible to hold the adhesive tape by sticking both left and right sides of the adhesive tape to the corrugated sheet outside the opening, and to easily grip the central part in the left and right direction. It becomes easier.

  It is preferable that the ratio of the length of the central break line to the length of the proximal fold line is 1.5 or more and 2.5 or less. According to this configuration, the tongue piece can be easily peeled off and the adhesive tape after the tongue piece peeling can be easily grasped.

  It is preferable that the upper cutting line be at least partially curved upward. According to this structure, since the area which can hold | grip the peeled adhesive tape becomes larger, it becomes still easier to peel off an adhesive tape from a cardboard box.

  The cutting rate of the central breaking line is 80% or more and 95% or less, the cutting rate of the upper cutting line is 95% or more, and the cutting rate of the lower cutting line is 85% or more and 99% or less. preferable. According to this configuration, it is easy to push the tongue piece and peel the end portion of the adhesive tape while preventing the central break line from unintentionally breaking.

  Here, “substantially symmetrical” on both sides of the central break line means that the distance between the corresponding points when folded at the central break line is 10% or less of the average distance from the central break line at both points. To do. Further, “substantially parallel” means that the relative angle is 10 ° or less. Moreover, the vertical position is “substantially equal” means that the inclination of the straight line connecting the two with respect to the horizontal direction is 10 ° or less. The “cutting rate” means the ratio of the length of the liner of the corrugated cardboard sheet being cut, and in the case of having a plurality of liners, it means the average of the ratio of the length of each liner being cut.

  The cardboard box sheet of the present invention can relatively easily peel off the end of the adhesive tape when the cardboard box is opened.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic plan view (development view) showing a cardboard box sheet according to an embodiment of the present invention. It is a typical perspective view which shows the sealed state of the cardboard box formed by assembling the sheet | seat for cardboard boxes of FIG. It is a typical enlarged plan view of the opening start part of the sheet | seat for cardboard boxes of FIG. It is a typical expansion perspective view at the time of the opening start of the cardboard box of FIG. It is a typical expansion perspective view of the peeling state of the adhesive tape edge part affixed on the cardboard box of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[Sheet for cardboard boxes]
FIG. 1 shows a sheet for a cardboard box according to an embodiment of the present invention. The cardboard box sheet is formed from a single cardboard sheet, and is assembled in a box shape as shown in FIG. In FIG. 1, a thick solid line indicates an edge formed by cutting the cardboard sheet, and a thin solid line indicates a ruled line formed by pushing the surface of the cardboard sheet.

  As the corrugated cardboard sheet forming the corrugated cardboard box sheet, not only one core sandwiched on both sides with a pair of liners but also a so-called double flute in which the core is sandwiched between three liners. You may use, and you may use what is called a single-sided cardboard with which the liner was stuck only on the one side of the center core.

  The cardboard box sheet includes two pairs of side panels (a first long side panel 1, a first short side panel 2, a second long side panel 3 and a second panel, which are alternately connected in the left-right direction). The short side panel 4) is connected to the side edge of the first long side panel 1 opposite to the first short side panel 2, and the two pairs of side panels 1 to 4 are connected in an endless cylindrical shape. And two pairs of outer lid flaps (first outer lid flap 6 and first outer flap 6 and the first outer lid flap 6) that extend from the upper edge of the pair of long side panels 1, 3 Two outer flaps 7), two pairs of lid flaps (first lid flap 8 and second lid flap 9) extending from the upper edges of the pair of short side panels 2, 4, Two pairs of outer bottom flaps (first ones) extending from the lower edges of the pair of long side panels 1 and 3 and having the leading edges butted in a sealed state The bottom outer flap 10 and the second bottom outer flap 11) and two pairs of bottom inner flaps (first bottom flap 12 and second bottom) extending from the lower edges of the pair of short side panels 2 and 4 An inner flap 13).

  In the present specification, the “left-right direction” is a direction corresponding to the horizontal direction in a general usage mode assumed for a box formed by assembling the corrugated cardboard sheet. `` Means up and down in the assumed general usage mode, but restricting the orientation at the time of production of the sheet for cardboard box and the orientation at the time of use of the box formed by assembling the sheet for cardboard box Not intended.

  The corrugated cardboard sheet is folded between the first long side panel 1 and the first short side panel 2, and between the second long side panel 3 and the second short side panel 4, respectively. The seam 5 is attached to the back surface of the region near the side edge on the opposite side of the second long side surface panel 3 of the second short side surface panel 4 to be connected in an endless cylindrical shape. The bonding of the joint 5 to the second short side surface panel 4 may be a method using a stapler, for example, in addition to a method using an adhesive.

  In the corrugated cardboard sheet, the joint 5 is usually attached to the second short side panel 4, and the first long side panel 1 and the second short side panel 4 are the first short side panel. It is provided to the user in a folded state in close contact with the panel 2 and the second long side panel 3. Thus, by making the said cardboard box sheet | seat into a folded state, the said several cardboard box sheet | seat can be stacked, and a cardboard box can be assembled easily.

  In the corrugated cardboard box sheet, first, the side panels 1 to 4 are formed to form a rectangular cylindrical body with the angle between adjacent side panels being substantially perpendicular, and then the bottom flaps 12 and 13 are folded inside the rectangular cylindrical body. Further, the bottom outer flaps 10 and 11 are folded on the outside of the bottom inner flaps 12 and 13 so as to abut the leading edges thereof, thereby assembling a bottomed rectangular cylindrical cardboard box.

  This cardboard box is sealed by folding the inner flaps 8 and 9 inside the rectangular cylindrical body, and further folding the outer flaps 6 and 7 outside the inner flaps 8 and 9 so that their leading edges are in contact with each other. It is boxed.

  Moreover, the cardboard box formed by assembling the sheet for the cardboard box is formed by sticking the adhesive tape T along the joint between the front end edges of the outer flaps 6, 7, 10, 11 as shown in FIG. The sealed state is maintained. These adhesive tapes T are bent and attached to the upper part or the lower part of the short side panels 2 and 4 at both ends.

  As the pressure-sensitive adhesive tape T used for sealing a cardboard box formed by assembling the cardboard box sheet, one having a width of 38 mm or more and 50 mm or less is generally used. Moreover, as the adhesive tape T, a tape of a water sticking method (a type in which a dry water-soluble paste is applied to the sticking surface) may be used.

  The cardboard box sheet has a peeling mechanism for peeling the adhesive tape T from the cardboard sheet when the box is opened in the region where the end of the adhesive tape T is stuck when the pair of short side panels 2 and 4 are sealed. Part P is included.

<Peeling mechanism part>
As shown in detail in FIG. 3, the peeling mechanism portion P extends in the vertical direction in the vicinity of the upper edges of the pair of short-side side panels 2 and 4 and in the center in the left-right direction, and is a central break line formed easily. 14, a pair of proximal fold lines 15 that extend substantially symmetrically on both sides of the central break line 14 and substantially parallel to the central break line 14, and are formed easily, and an upper end and a proximal end of the central break line 14. An upper cutting line 16 connected to the upper end of the folding line 15 and formed in advance so as to be cut or easily cut (in the illustrated example, the cardboard sheet is formed by being completely cut in advance) and the lower end of the central breaking line 14 And the lower end of the base bending line 15 are connected to each other and formed in advance so as to be easily cut or cut (in the illustrated example, the corrugated cardboard sheet is not cut near the lower end of the central breaking line 14 and is easily cut as a whole Lower cutting line 17) Having.

  With this configuration, the peeling mechanism part P is substantially symmetrically defined in the left-right direction across the central breaking line 14 by the central breaking line 14, the proximal bending line 15, the upper cutting line 16 and the lower cutting line 17, respectively. It has a pair of tongue pieces F that can be bent inside the cardboard box with the base end folding line 15 as the base end.

  When the cardboard box formed by assembling the sheet for the cardboard box is opened, as shown in FIG. 4, the vicinity of the central breaking line 14 below the adhesive tape T is pushed with a finger to break the central breaking line 14, and a pair of tongues The tongue piece F is peeled from the adhesive tape T by being pushed into the inside of the cardboard box from the lower part of the piece F. At this time, since the corrugated cardboard sheet has elasticity, the force that first peels off the tongue piece F concentrates on the portion of the edge of the adhesive tape T on the central breaking line 14 and acts locally, so that the corrugated cardboard sheet is relatively easy. The edge part of the adhesive tape T can be peeled from the sheet.

  Further, by pressing the pair of tongue pieces F and folding the pair of tongue pieces F along the proximal fold line 15 as shown in FIG. 5, the tongue pieces F are peeled off from the adhesive tape T. The peeling mechanism P is opened so that the end of the adhesive tape T can be gripped.

  In this peeling mechanism portion P, the length of the central breaking line 14 is larger than the length of the proximal folding line 15 and the vertical positions of the lower end of the central breaking line 14 and the lower end of the proximal folding line 15 are substantially equal. Is preferred. As described above, the central breaking line 14 is longer than the proximal fold line 15 and the vertical positions of the lower ends of the central rupture line 14 and the proximal fold line 15 are substantially equal. Since it will be inclined outward and downward from the upper end, the opening shape of the peeling mechanism portion P formed when the pair of tongue pieces F are pushed in is convex upward. As a result, the adhesive tape T is held in a state along the short side panels 2 and 4 with both left and right sides of the adhesive tape T being stuck to the corrugated sheet outside the opening, and a finger is put in the center in the left and right direction to adhere. The tape T can be easily gripped. For this reason, the operation | work which peels and peels off the adhesive tape T becomes easier.

  The lower limit of the ratio of the length of the central breaking line 14 to the length of the proximal bending line 15 is preferably 1.5, and more preferably 1.8. On the other hand, the upper limit of the ratio of the length of the central breaking line 14 to the length of the proximal bending line 15 is preferably 2.5, and more preferably 2.2. If the ratio of the length of the central breaking line 14 to the length of the proximal folding line 15 is less than the lower limit, the end of the adhesive tape T after the tongue piece F is peeled off is folded back into the cardboard box, If the height of the region where the tongue piece F is peeled is reduced, it may not be easy to grip and peel off the end of the adhesive tape T. On the contrary, when the ratio of the length of the central breaking line 14 to the length of the proximal bending line 15 exceeds the above upper limit, the height of the region of the tongue piece F that peels from the adhesive tape T becomes too large, and the adhesive tape T There is a possibility that it will not be easy to peel off, or that the width of the region where the tongue piece F is peeled off will be small, and it will be difficult to grip and peel the end of the adhesive tape T.

  In the peeling mechanism part P, it is preferable that the upper cutting line 16 is curved at least partially in a convex shape upward. As described above, since the upper cutting line 16 is curved at least partially upwardly, the area in which the adhesive tape T can be gripped after the tongue piece F is peeled off becomes larger. It becomes easier to peel off from the box. For this reason, it is particularly preferable that the portion of the upper cutting line 16 close to the central breaking line 14 is convex.

  The lower limit of the length of the central breaking line 14 is preferably 25 mm, and more preferably 30 mm. On the other hand, as an upper limit of the length of the center breaking line 14, 80 mm is preferable and 50 mm is more preferable. If the length of the central breaking line 14 is less than the above lower limit, the length of the portion of the adhesive tape T that is attached to the tongue piece F may be shortened, making it difficult to grip the adhesive tape T, or the tongue piece F. There is a possibility that most of the cover is covered with the adhesive tape T and the tongue F cannot be pushed. On the other hand, when the length of the central breaking line 14 exceeds the above upper limit, the strength of the box formed by assembling the corrugated cardboard sheet may be unnecessarily lowered, and the peeling mechanism part P is easily opened unintentionally. There is a risk.

  The lower limit of the distance from the upper edge of the short side panels 2 and 4 to the upper end of the central break line 14 is preferably 10 mm, and more preferably 15 mm. On the other hand, the upper limit of the distance from the upper edge of the short side panels 2 and 4 to the upper end of the central break line 14 is preferably 30 mm, and more preferably 25 mm. When the distance from the upper edge of the short side panels 2 and 4 to the upper end of the central break line 14 is less than the above lower limit, the adhesive tape T is applied so that the end can be peeled by pressing the tongue F and the short side Since a sufficient adhesion area for the panels 2 and 4 cannot be secured, sealing may be uncertain. On the other hand, when the distance from the upper edge of the short side panels 2 and 4 to the upper end of the central break line 14 exceeds the above upper limit, the length of the adhesive tape T bonded to the short side panels 2 and 4 is particularly increased. There is a possibility that it becomes impossible to seal with a general sealing machine.

  The lower limit of the average distance between the central break line 14 and the proximal fold line 15 is preferably 20 mm, more preferably 23 mm. On the other hand, as an upper limit of the average distance between the central breaking line 14 and the proximal bending line 15, the width of the adhesive tape T is preferably 40 mm, and more preferably 35 mm. If the average distance between the center breaking line 14 and the proximal bending line 15 is less than the lower limit, the width of the peeling mechanism portion P becomes insufficient, and the adhesive tape T may not be easily gripped. Conversely, if the average distance between the central break line 14 and the proximal fold line 15 exceeds the above upper limit, the strength of the box formed by assembling the corrugated cardboard sheet may be unnecessarily lowered, or the peeling mechanism P May be easily opened without intention.

  As a minimum of a cutting rate of central fracture line 14, 80% is preferred and 85% is more preferred. On the other hand, the upper limit of the cutting rate of the central breaking line 14 is preferably 95% and more preferably 92%. When the cutting rate of the central break line 14 is less than the lower limit, it may be difficult to break the central break line 14. Conversely, when the cutting rate of the central breaking line 14 exceeds the above upper limit, the central breaking line 14 may break unintentionally before opening and the peeling mechanism part P may be opened.

  Since the adhesive tape T is stuck at the time of sealing and the unintended folding of the tongue piece F is suppressed, the upper cutting line 16 does not cause a problem even if the cutting rate is increased. For this reason, the lower limit of the cutting rate of the upper cutting line 16 is preferably 95%, and more preferably 98%. On the other hand, the upper limit of the cutting rate of the upper cutting line 16 is not particularly limited. If the cutting rate of the upper cutting line 16 is less than the lower limit, it is necessary to cut the upper cutting line 16 at the same time as the tongue piece F is peeled off from the adhesive tape T, so that the peeling of the adhesive tape T may not be easy. .

  Since the lower cutting line 17 is not attached with the adhesive tape T, it is preferable to make the cutting rate smaller than that of the upper cutting line 16. Further, in order to prevent unintentional release of the peeling mechanism portion P, the lower cutting line 17 is formed so that the lower end portion of the central breaking line 14 is a non-cutting portion (the central breaking line 14 cut line and the lower cutting line 17 cut line). It is preferable that the connection is not connected. The lower limit of the cutting rate of the lower cutting line 17 is preferably 85%, more preferably 90%. On the other hand, the upper limit of the cutting rate of the lower cutting line 17 is preferably 99%, more preferably 97%. If the cutting rate of the lower cutting line 17 is less than the lower limit, the tongue piece F may not be easily folded. On the other hand, when the cutting rate of the lower cutting line 17 exceeds the above upper limit, the central breaking line 14 may break unintentionally before opening and the peeling mechanism part P may open.

[Other Embodiments]
The said embodiment does not limit the structure of this invention. Therefore, in the above-described embodiment, components of each part of the above-described embodiment can be omitted, replaced, or added based on the description and common general knowledge of the present specification, and they are all interpreted as belonging to the scope of the present invention. Should.

  In the cardboard box sheet, the configuration for forming the bottom of the cardboard box can be any configuration such as a one-touch type or an American lock type.

  In the cardboard box sheet, instead of the flap in the lid, for example, a structure such as a flange, a stored article support or a buffer forming part, a partition forming part may be provided.

  The corrugated cardboard box sheet may be an outer flap that seals a flap extending from the upper edge of the short side panel in a butted state, and a peeling mechanism portion is formed on the long side panel.

  The corrugated cardboard box sheet may be one in which a peeling mechanism portion is formed only on one of a pair of side panels other than the side panel on which a flap to be abutted extends.

  The sheet for cardboard boxes can be widely used as a cardboard box for transporting various products.

1, 3 Long side panel 2, 4 Short side panel 5 Joint 6,7 Outside flap 8,9 Inside lid 10,11 Bottom outside flap 12,13 Bottom inside flap 14 Center breaking line 15 Base end fold line 16 Upper cutting line 17 Lower cutting line F Tongue piece P Peeling mechanism part T Adhesive tape

Claims (5)

Formed from one cardboard sheet,
Two pairs of side panels connected alternately in the left-right direction;
A cardboard box sheet comprising: a pair of flaps extending from the upper edges of the pair of side panels, and having a pair of flaps whose leading edges are butted in a sealed state;
A central break line that extends in the vertical direction in the vicinity of the upper edge of at least one of the other side panels of the other pair and in the center in the left-right direction, and is formed easily to break,
A pair of proximal fold lines that extend substantially symmetrically on both sides of the central break line and extend substantially parallel to the central break line, and are formed easily;
Connecting the upper end of the central break line and the upper end of the proximal fold line, and an upper cutting line formed in advance so as to be easily cut or cut;
A cardboard box sheet, comprising: a lower cutting line that connects the lower end of the central break line and the lower end of the proximal bending line and is previously cut or easily cut.   The cardboard box sheet according to claim 1, wherein the central break line is longer than the proximal fold line, and the vertical positions of the lower ends of the central break line and the proximal fold line are substantially equal.   The cardboard box sheet according to claim 2, wherein a ratio of a length of the central break line to a length of the proximal fold line is 1.5 or more and 2.5 or less.   The sheet for cardboard boxes according to claim 1, wherein the upper cutting line is at least partially curved upwardly in a convex shape. The cutting rate of the central break line is 80% or more and 95% or less,
The cutting rate of the upper cutting line is 95% or more,
The cardboard box sheet according to any one of claims 1 to 4, wherein a cutting rate of the lower cutting line is 85% or more and 99% or less.

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