JP3200794U - Box sheet - Google Patents

Abstract

The present invention provides a box sheet that has a relatively small strength drop in an assembled box and can be relatively easily broken when discarded. A box sheet is a box sheet that is formed from a single cardboard sheet and is assembled into a box, and includes a plurality of flaps 7 to 14 that are overlapped with other parts in an assembled state. A recess 15 for starting breakage of a corrugated cardboard sheet is formed at the leading edges of the plurality of flaps. The said recessed part may have an arc-shaped or elliptical arc-shaped side edge which continues from the flap leading edge on both sides of the recessed part. The pair of side edges of the recess may be connected by a back end edge having a radius of curvature of 1 mm or more and 4 mm or less. The said recessed part is good to be formed in the sticking plan area | region of the adhesive tape for sealing. Of the plurality of flaps, a break start opening 16 may be formed in an inner flap that is overlapped inside another portion in an assembled state. [Selection] Figure 1

Description

  The present invention relates to a box sheet.

  Boxes formed from corrugated cardboard sheets are widely used for applications such as product packaging. Some cardboard boxes are called boxing and are used repeatedly, but many cardboard boxes are discarded after being used once.

  When the cardboard box is discarded, the cardboard box is developed to reduce the volume of the waste. Furthermore, particularly in ordinary households and the like, there are many cases where it is necessary to fold a cardboard box and then fold it into small pieces or cut it into small pieces for disposal in garbage bags.

  When the cardboard sheet in which the cardboard box is unfolded is folded and discarded, the cardboard sheet cannot be kept in a small folded state due to its waist (elasticity) and easily expands. For this reason, when the corrugated cardboard sheet is folded and discarded, it is necessary to fix the corrugated cardboard sheet so that it does not spread with a packing string or adhesive tape.

  On the other hand, when the cardboard sheet is cut and discarded, the cutting is not easy. When the cardboard sheet is broken by hand, it is finally cut along the folding line, and it is not an easy task to divide a relatively large cardboard box into a size that fits in a garbage bag. Further, although the cardboard sheet can be cut using a cutter knife or scissors, it is still not easy to cut the cardboard sheet, and when the cutter knife or scissors are used, there is an inconvenience that a lot of paper dust is easily generated.

  Therefore, in order to facilitate disposal of the packaging box, it has been proposed to form a perforation for breakage in the packaging box sheet (Japanese Patent Laid-Open No. 11-165729). In the packaging box described in this publication, a decrease in strength of the packaging box is suppressed by forming the perforation to be bent, but it is unavoidable that the strength is reduced as compared to a box without a perforation. Absent.

JP-A-11-165729

  In view of the above inconveniences, an object of the present invention is to provide a box sheet that is relatively small in strength reduction in an assembled box and can be relatively easily broken when discarded.

  The invention made to solve the above problems is a box sheet that is formed from a single cardboard sheet and is assembled into a box, and includes a plurality of flaps that are overlapped with other parts in an assembled state, The box sheet is characterized in that a recess for starting breakage of a corrugated cardboard sheet is formed at the leading edge of the plurality of flaps.

  The box sheet can be broken relatively easily by hand at the time of disposal because the breakage for breaking the corrugated cardboard sheet is formed at the leading edge of the flap. In addition, the box sheet has a relatively small contribution to the strength of the box in the assembled state at the leading edge of the flap, so that the strength reduction in the assembled box is relatively small. .

  The said recessed part is good to have an arc-shaped or elliptical arc-shaped side edge which continues from the flap tip edge of the both sides of a recessed part. In this way, the corners of the corrugated cardboard sheet pieces formed by breaking the box sheet by having the concave portions have arc-shaped or elliptical arc-shaped side edges continuous from the flap leading edges on both sides of the concave portions. It is possible to suppress the cardboard sheet from breaking through the garbage bag when the box sheet is discarded.

  The pair of side edges of the recess may be connected by a back end edge having a radius of curvature of 1 mm or more and 4 mm or less. In this way, the pair of side edges of the recess are connected by the back end edges having a radius of curvature of 1 mm or more and 4 mm or less, whereby the box sheet can be prevented from unintentionally breaking before being discarded. .

  The said recessed part is good to be formed in the sticking plan area | region of the adhesive tape for sealing. Thus, since the said recessed part is formed in the sticking scheduled area | region of the adhesive tape for sealing, a recessed part does not stand out in a sealed state.

  Of the plurality of flaps, a break initiation opening may be formed in an inner flap that is overlapped inside another portion in an assembled state. In this manner, among the plurality of flaps, the opening for breaking is formed in the inner flap that is overlapped inside the other part in the assembled state, thereby further facilitating the breaking of the box sheet. Can do.

  As described above, the box sheet of the present invention has a relatively small strength drop in the assembled box, and can be relatively easily broken when discarded.

It is a typical top view (development drawing) which shows the sheet for boxes of one embodiment of the present invention. It is a typical perspective view which shows the box formed by assembling the sheet | seat for boxes of FIG. It is a typical perspective view which shows the boxing state by the adhesive tape of the box body which assembled the sheet | seat for boxes of FIG. It is a typical fragmentary top view which expands and shows the flap in a lid | cover of the sheet | seat for boxes of FIG. It is a typical top view (development figure) which shows the sheet | seat for boxes of embodiment different from FIG. 1 of this invention. It is a typical perspective view which shows the box body of the assembly state of the sheet | seat for boxes of FIG.

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

[First embodiment]
The box sheet of FIG. 1 is formed from a single cardboard sheet and can be assembled into the box shown in FIG. In the drawing, a thick line indicates a cutting line obtained by cutting the sheet, and a thin line indicates a ruled line formed by embossing on the inner surface side of the sheet. In the following description, “upper and lower” and “left and right” are used for convenience to indicate the relative positional relationship of each component, and are not necessarily assembled from the box sheet and the box sheet. The positional relationship in the usage state of the box is not limited.

  The box sheet includes a pair of substantially square long face plates 1 and 2 that face each other in an assembled state, and a pair of substantially square faces that face each other by connecting the side edges of the pair of long face plates 1 and 2 in an assembled state. The rectangular tubular portion 6 including the width face plates 3 and 4 and the joint 5 connecting the first length face plate 1 and the second width face plate 4, and extending from the upper edges of the pair of length face plates 1 and 2. A pair of lid outer flaps 7 and 8 to be extended, a pair of lid flaps 9 and 10 extending from the upper edges of the pair of width face plates 3 and 4, and a pair of long face plates 1 and 2 extending from the lower edges A pair of outer bottom flaps 11 and 12 and a pair of bottom inner flaps 13 and 14 extending from the lower edges of the pair of width face plates 3 and 4.

  The rectangular tubular portion 6 includes a first length face plate 1, a first width face plate 3, a second length face plate 2, and a second width face plate 4 arranged in this order in the left-right direction. The first length face plate 1 and the second width face plate 4 are connected to each other by a joint 5 extending from the side edge of the length face plate 1 opposite to the first width face plate 3, and is viewed in plan view in the assembled state. A rectangular tube is formed.

  The box sheet is usually folded so that the first length face plate 1 is brought into close contact with the inner surface of the first width face plate 3, and then the second width face plate 4 is brought into close contact with the inner face of the second length face plate 2. The rectangular tubular portion 6 is connected in an endless manner by attaching the joint 5 to the inner side surface of the second width face plate 4, and the folding does not form a space inside the rectangular tubular portion 6. Provided to users in state.

  When the box sheet is in an assembled state, the opening on the upper side of the rectangular tubular portion 6 bends the inner flaps 9 and 10 inside, and then the outer flaps 7 and 8 are placed outside the inner flaps 9 and 10. The bottom opening of the rectangular cylindrical portion 6 is similarly sealed outside by folding the bottom end flaps 13 and 14 folded inward. 11 and 12 are sealed by folding.

  That is, the box sheet is a box sheet that forms a so-called orange box type A cardboard box. For this reason, the lid flaps 9 and 10 and the bottom flaps 13 and 14 are in an assembled state in other parts of the box sheet, specifically, the lid flaps 7 and 8 or the inside of the bottom flaps 11 and 12. Is superimposed on.

  As shown in FIG. 3, the box formed by assembling the box sheet is attached with an adhesive tape T so as to cover the leading edges of the outer flaps 7 and 8 and the outer flaps 11 and 12 that are abutted. Is sealed.

  The box sheet includes a pair of outer flaps 7 and 8, a pair of inner flaps 9 and 10, a pair of bottom outer flaps 11 and 12, and a pair of bottom inner flaps 13 and 14, respectively. A recess 15 for starting breakage of the corrugated cardboard sheet is formed. In the present embodiment, two recesses 15 are formed in each of the flaps 7 to 14.

  These recesses 15 are formed in a portion of the box formed by assembling the box sheet so as to be overlapped with other portions of the box sheet. In more detail, the recessed part 15 is formed in the area | region overlapped inside the other part of the said sheet | seat for the said boxes, or the sticking plan area | region of the adhesive tape T for sealing. Thereby, the recessed part 15 is comparatively inconspicuous in the sealed state of the box formed by assembling the box sheet.

  The box sheets are assembled on the pair of lid flaps 9 and 10 and the pair of bottom flaps 13 and 14 that are stacked inside the lid outer flaps 7 and 8 or the bottom outer flaps 11 and 12 in an assembled state, respectively. An opening 16 for starting breakage is formed.

  Further, in the box sheet, a pair of in-cover flaps 9 and 10 and a pair of bottom flaps 13 and 14 are provided with cuts 17 that promote breakage of the cardboard sheet.

  In addition, the box sheet is folded in the flap 7 except for the joint-side end portions of the front edge of the lid outer flaps 7 and 11 and the lid flaps 10 and 14 located in the vicinity of the joint 5. The corners of the tip edge and the side edge of -14 are rounded and chamfered. That is, the box sheet ensures that the box sheet is accurately folded along the ruled line when the second width face plate 4 and the joint 5 are bonded together with a general gluer (folding glue device). For example, the outer edges of the lid outer flaps 7 and 11 and the inner lid flaps 10 and 14 with which the guides of the right-angle correction mechanism come into contact have an outer edge shape with no corners. This makes it difficult to break through the garbage bag when the box sheet is put in the garbage bag and discarded. Further, by not chamfering the end portions of the outer edge of the outer lid flaps 7 and 11 and the inner flaps 10 and 14, the box sheet in a folded state follows the ruled line from the positional relationship of the end portions of the leading edge. Thus, it can be relatively easily confirmed whether or not it is bent accurately.

<Cardboard sheet>
The corrugated cardboard sheet forming the box sheet is not only a sheet in which both sides of one core are sandwiched between a pair of liners, but also a so-called double flute in which the core is sandwiched between three liners. Alternatively, a so-called single-sided cardboard in which a liner is attached only to one side of the core may be used.

  In the box sheet, the cardboard sheet is oriented so that the ridgeline of the core extends in the vertical direction, and the buckling strength in the normal use state of the box body formed by assembling the box sheet can be improved. Is preferable.

<Recess>
The recess 15 is preferably formed so that the distance from the side edges of the flaps 7 to 14 is within the range of the extension length of the flaps 7 to 14 or less. Thus, by forming the recess 15 in the vicinity of the side edges of the flaps 7 to 14, the inner flaps 9, 10, 13, 14 and the outer flaps 7, 8, 11, 12 overlap when the recess 15 is assembled. It is difficult to form a gap in the box formed by assembling the box sheet.

  As a minimum of the width of the direction along the tip edge of flaps 7-14 of each crevice 15, 3cm is preferred and 5cm is more preferred. On the other hand, the upper limit of the width of each recess 15 is preferably 12 cm, and more preferably 10 cm. When the width | variety of each recessed part 15 is less than the said minimum, there exists a possibility that the fracture | rupture start of the said sheet | seat for boxes concerned cannot fully be accelerated. On the other hand, when the width of each recess 15 exceeds the above upper limit, the strength of the box formed by assembling the box sheet may be insufficient.

  As a minimum of the maximum depth (maximum perpendicular distance from a flap tip edge) of each crevice 15, 15 mm is preferred and 20 mm is more preferred. On the other hand, the upper limit of the maximum depth of each recess 15 is preferably 35 mm, and more preferably 30 mm. When the maximum depth of each recessed part 15 is less than the said minimum, there exists a possibility that the fracture | rupture start of the said sheet | seat for boxes concerned cannot fully be accelerated. Conversely, if the maximum depth of each recess 15 exceeds the above upper limit, it may not be easy to cover the recess 15 with the sealing tape T for sealing, or unnecessary for a box formed by assembling the box sheet. There is a risk that a gap will be formed.

  As shown in FIG. 4, the recess 15 has a pair of side edges 18 that are arc-shaped or elliptical arc-shaped and continuous from the flap leading edges on both sides of the recess 15. In this way, when the concave portion 15 has a side edge continuous from the flap leading edge and does not form a corner at the boundary between the flap leading edge and the concave portion 15, the box sheet is trashed from the concave portion 15. Since the corners that break through the bag are less likely to be formed, the box sheet can be discarded more easily.

  The pair of side edges 18 are preferably arcuately formed in line symmetry (mirrored) with respect to an axis perpendicular to the flap tip edge. The lower limit of the inner angle of the side edge 18 is preferably 45 °, more preferably 60 °. On the other hand, the upper limit of the inner angle of the side edge 18 is preferably 90 °, and more preferably 80 °. When the inner angle of the side edge 18 is less than the lower limit, the break start of the box sheet may not be sufficiently promoted. On the contrary, when the inner angle of the side edge 18 exceeds the upper limit, the strength of the box formed by assembling the box sheet may be insufficient, or the box sheet may be unintentionally broken.

  The lower limit of the average curvature radius of the side edge 18 is preferably 1 cm and more preferably 2 cm. On the other hand, the upper limit of the average curvature radius of the side edge 18 is preferably 6 cm, and more preferably 5 cm. When the average curvature radius of the side edge 18 is less than the above lower limit, the concave portion 15 becomes small, and there is a possibility that the break start of the box sheet cannot be sufficiently promoted. On the contrary, when the average curvature radius of the side edge 18 exceeds the above upper limit, the strength of the box formed by assembling the box sheet may be insufficient, or the box formed by assembling the box sheet may be an adhesive tape. When sealed with T, the recess 15 may not be covered with the adhesive tape T.

  Moreover, although the recessed part 15 may be formed only from the said pair of side edge 18, as shown in the figure, the back of the said pair of side edge 18 has the back end edge 19 which connects an edge part with a curve without a corner. It is preferable.

  The lower limit of the radius of curvature of the inner edge 19 is preferably 1 mm, and more preferably 1.5 mm. Conversely, the upper limit of the radius of curvature of the back edge 19 is preferably 4 mm, more preferably 3 mm, and even more preferably 2.5 mm. If the radius of curvature of the back edge 19 is less than the lower limit, the box sheet may be unintentionally broken or the recess 15 may not be easily processed. On the other hand, when the radius of curvature of the back edge 19 exceeds the upper limit, the break start of the box sheet may not be sufficiently promoted.

<Opening>
The opening 16 is preferably formed in the inner flaps 9, 10, 13, 14 side by side with the recess 15. By forming the opening 16 side by side with the recess 15, the box sheet is further easily broken.

  As shown in the figure, the shape of the opening 16 may be a shape in which four main end edges 20 that are arc-shaped or elliptical arc-shaped protruding inside the opening 16 are connected by four back end edges 21.

  The radius of curvature of the main edge 20 and the back edge 21 of the opening 16 can be the same as that of the side edge 18 and the back edge 19 of the recess 15.

  The opening 16 is preferably oriented so that one back end edge 21 faces the back end edge 19 of the recess 15.

<Incision>
The incision 17 is preferably formed in the inner flaps 9, 10, 13, and 14 along with the opening 16 in the left-right direction, and is arranged so that the rear edge 21 of the opening 16 is positioned on the extension line. preferable.

  Thus, by forming the cuts 17, the box sheet can be further subdivided.

  As a minimum of the length of each notch 17, 3 mm is preferred, 5 mm is more preferred, and 10 mm is still more preferred. On the other hand, the upper limit of the length of each cut 17 is preferably 30 mm, and more preferably 20 mm. When the length of each cut 17 is less than the lower limit, the breakage of the box sheet may not be sufficiently promoted. On the other hand, when the length of each cut 17 exceeds the above upper limit, the box sheet may be unintentionally broken or the strength of the box formed by assembling the box sheet may be insufficient.

<Advantages>
Since the box sheet is formed with a recess 15 at the leading edge of each of the flaps 7 to 14, the decrease in strength in the assembled box is relatively small, and it can be relatively easily discarded when discarded. can do.

[Second Embodiment]
The box sheet of FIG. 5 is formed from a single cardboard sheet and can be assembled into the box shown in FIG. The corrugated cardboard sheet forming the box sheet of FIG. 5 can be the same as the corrugated cardboard sheet forming the box sheet of FIG.

  The box sheet includes a substantially square rear plate 31, a substantially square front plate 32 facing the rear plate 31 in an assembled state, and a pair of substantially square side plates 33 connecting the rear plate 31 and the front plate 32, And a rectangular tubular portion 36 including a joint 35 that connects the rear plate 31 and the second side plate 34. The square cylindrical portion 36 includes a rear plate 31, a first side plate 33, a front plate 32, and a second side plate 34 that are arranged in this order in the left-right direction, and the rear plate 31 is opposite to the first side plate 33. By the joint 35 extending from the side edge, a cylinder having a rectangular shape in plan view is formed in the assembled state.

  Further, the box sheet includes a cover plate 37 extending from the upper edge of the rear plate 31, an insertion flap 38 further extending from the extended side end edge of the cover plate 37, and a pair of side plates 34. A pair of in-lid flaps 39, 40 extending from the edge is provided. The box sheet is in an assembled state, and the upper opening of the rectangular tubular portion 36 bends the in-lid flaps 39 and 40 inward, and then folds the lid plate 37 on the outside of the in-lid flaps 39 and 40. The insertion flap is sealed by being inserted into the rectangular cylindrical portion 36 along the inner surface of the front plate 32. That is, the box sheet is a box sheet forming a so-called B-type cardboard box.

  Further, the box sheet includes a pair of main bottom flaps 41 and 42 extending from the lower edges of the rear plate 31 and the front plate 32 and a pair of auxiliary bottom flaps 43 extending from the lower edges of the pair of side plates 34. 44. The main bottom flaps 41 and 42 and the auxiliary bottom flaps 43 and 44 are configured to form a so-called one-touch type bottom portion.

  Specifically, the main bottom flaps 41 and 42 pass through the end portion of the base end edge on one side in the left-right direction, and are folded portions 45 and demarcated by ruled lines formed by tilting the base end edge by 45 °. 46. In the box sheet, the main bottom flaps 41 and 42 and the auxiliary bottom flaps 43 and 44 are folded back to the inner surface side of the rectangular tubular portion 36, and the folded portions 45 and 46 are further turned to the outer surface side of the main bottom flaps 41 and 42 (squares). The outer surfaces of the auxiliary bottom flaps 43 and 44 are bonded in advance to the inner surfaces of the folded portions 45 and 46. As a result, the box sheet is provided to the user in a folded state, and the user expands the rectangular cylindrical portion 36 into a rectangular cylindrical shape so that the main bottom flaps 41 and 42 and the auxiliary bottom flaps 43 and 44 are appropriately combined. To form the bottom of the box.

  The box sheet usually has the rear plate 31 folded back to the inner surface side of the first side plate 33, the second side plate 34 folded back to the inner surface side of the front plate 32, the main bottom flaps 41, 42 and the auxiliary bottom flap 43, 44 in a folded state in which the main bottom flaps 41 and 42 and the auxiliary bottom flaps 43 and 44 are sandwiched inside the rectangular tubular portion 36 by adhering the joint 35 to the second side plate 34. Provided to users.

  In addition, the box sheet starts to break the corrugated cardboard sheet at the extension side leading edge of the insertion flap 38, the extension side leading edge of the pair of lid flaps 39 and 40, and the upper edge of the front plate 32, respectively. A concave portion 47 is formed.

  These concave portions 47 are formed in a portion of the box formed by assembling the box sheet so as to be overlapped with other portions of the box sheet. That is, the plurality of recesses 47 are formed at positions that do not overlap each other in the sealed state of the box formed by assembling the box sheet. Thereby, it becomes difficult to form an unnecessary gap in the box formed by assembling the box sheet.

  The shape of the recess 47 in the box sheet of FIG. 5 can be the same as the shape of the recess 15 in the box sheet of FIG.

<Advantages>
Since the recesses 47 are formed on the front edge of the insertion flap 38, the front edge of the lid flaps 39 and 40, and the upper edge of the front plate 32, the box sheet has a reduced strength drop in the assembled box. The corrugated cardboard sheet can be broken and discarded relatively easily.

[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.

  The present invention is not limited to the A-type cardboard box sheet of the first embodiment and the B-type cardboard box sheet of the second embodiment, and may be applied to any type of box sheet.

  In the box sheet, the number of recesses provided in each flap can be appropriately selected according to the width of the flap, and may be one or may be three or more.

  In the box sheet of the first embodiment, the corners on both sides of the leading edge of all the flaps may be chamfered by shifting the guide position of the right angle correction. Moreover, in the said sheet | seat for boxes, such chamfering is not essential and may have an angle | corner in the edge part of the front-end edge of a flap, and the boundary of a flap front-end edge adjacent to a recessed part.

  The opening and cutting of the inner flap in the box sheet of the first embodiment are arbitrary, and the same opening or cutting may be provided in the lid flap in the box sheet of the second embodiment. Moreover, the shape of an opening should just have an edge shape which can accelerate | stimulate a fracture | rupture start, and is not restricted to the shape of 1st embodiment.

  The present invention can be particularly suitably used for a cardboard box sheet assembled into a relatively large box.

1, 2 Long face plate 3, 4 Width face plate 5 Joint 6 Square cylindrical part 7, 8 Lid outside flap 9, 10 Lid inside flap 11, 12 Bottom outside flap 13, 14 Bottom inside flap 15 Recess 16 Opening 17 Cut 18 Side edge 19 Back end edge 20 Main end edge 21 Back end edge 31 Rear plate 32 Front plate 33, 34 Side plate 35 Joint 36 Square cylindrical portion 37 Cover plate 38 Insertion flap 39, 40 Inner flap 41, 42 Main bottom Flap 43, 44 Auxiliary bottom flap 45, 46 Folding part 47 Recessed part T Adhesive tape

Claims (5)

A box sheet formed from a single cardboard sheet and assembled into a box,
Provided with a plurality of flaps superimposed on other parts in the assembled state,
A box sheet comprising: a plurality of flaps, each of which has a rupture start recess for a corrugated cardboard sheet formed at a leading edge thereof.   The box seat according to claim 1, wherein the concave portion has side edges that are arc-shaped or elliptical arc-shaped, continuous from the flap tip edges on both sides of the concave portion.   The box sheet according to claim 2, wherein the pair of side edges of the recess are connected by a back end edge having a radius of curvature of 1 mm or more and 4 mm or less.   The box sheet according to claim 1, wherein the concave portion is formed in a planned sticking region of the sealing adhesive tape.   The box sheet according to any one of claims 1 to 4, wherein an opening for break initiation is formed in an inner flap that is overlapped with another portion in an assembled state among the plurality of flaps.

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