JP3197531U - Box sheet - Google Patents

Abstract

The present invention provides a box sheet that can be relatively easily closed. A box sheet has first and second end edges 1a, 1b facing each other and third and fourth end edges 1c, 1d facing each other, and forms a bottom plate in an assembled state. Part 1, first to fourth side plate parts 2, 3, 4, 5 provided to extend from the first to fourth end edges of the bottom plate part and constitute side plates in the assembled state, First and second cover plate portions 6 and 7 that are provided to extend from the extending side edge of the second side plate portion and constitute the top plate in the assembled state, and third and fourth side plate portions A pair of flange portions 8 and 9 that are provided to extend from the end edges on the extending side of the first and second cover plate portions in an assembled state. The slits 16 and 17 are formed along the extended side edges of the third and fourth side plate portions, and the first lid plate portion is slit in the assembled state. Have respective engagement entrant pair of insertion piece 14 and 15, the width of the first end edge of the slit is larger than the width of the second end edge. [Selection] Figure 1

Description

  The present invention relates to a box sheet.

  For example, a box having a height smaller than the width and length, such as a pizza box, includes a bottom plate, a plurality of side plates extending from each edge of the bottom plate, and a lid plate extending from one of the side plates. In many cases, it has a structure.

  In such a box, as a configuration for holding the cover plate in a closed state, an insertion piece extending from both end edges of the cover plate is provided, and the above insertion is performed on the flange portion extending from the front end edge of the side plate. There is a structure in which a slit into which a piece is inserted is provided (see, for example, JP-A-2008-155960).

  When inserting pieces on both edges of the lid plate, it is not easy to close the lid plate because the insert pieces on both sides must be inserted into the slit at the same time while folding the lid plate. Occurs.

  Also, if the fold line length is quite large compared to the height of the box, such as a pizza box, the box can be easily assembled if it cannot be folded accurately along the pre-planned fold line. There arises a problem that the box is lost or the assembled box is deformed.

  In general, a cardboard sheet is often used as the material for the pizza box. However, as a method of forming a fold line on the cardboard sheet, a method of forming a ruled line by embossing the sheet, and intermittent cutting into the sheet There is a method of providing (a so-called perforation).

  However, in a pizza box having a long fold line, if the fold line is formed by a ruled line, it is not easy to bend it accurately along the fold line. Also, when using a perforation, if the length of the end of the fold line that is not cut is lengthened, there is a risk that it will not bend accurately at this end. May break.

  The difficulty of folding along the folding line makes the lid plate closing operation more difficult.

JP 2008-155960 A

  In view of the above inconveniences, an object of the present invention is to provide a box sheet whose lid plate can be relatively easily closed.

  The invention made in order to solve the above-mentioned problem is a box sheet which is composed of a single sheet and is assembled into a box having a bottom plate, a top plate, and a plurality of side plates, which are opposed to each other. A bottom plate portion having an end edge and third and fourth end edges facing each other, forming a bottom plate in an assembled state, and extending from the first to fourth end edges of the bottom plate portion; The first to fourth side plate portions constituting the side plate in the state, and the first and second side plate portions extending from the end edges on the extending side, respectively, and constituting the top plate in the assembled state And the second lid plate portion and the extending end edges of the third and fourth side plate portions, respectively, and arranged below the first and second lid plate portions in the assembled state. A pair of flange portions, and a pair of flange portions on the extended side edges of the third and fourth side plate portions. A slit is formed, and the first cover plate portion has a pair of insertion pieces that can be respectively engaged with the slit in an assembled state, and the width of the first edge side of the slit is the second width. It is a box sheet characterized by being larger than the width on the edge side.

  In the box sheet, a slit is formed in the pair of flange portions along the extending edge of the third and fourth side plate portions, and the first lid plate portion is associated with the slit in the assembled state. It has a pair of insertable insertable pieces, and the width of the slit on the first edge side is larger than the width on the second edge side. That is, the box sheet is close to the swing center of the first lid plate portion (the folding line between the first side plate portion and the first lid plate portion), and is paired by the swing of the first lid plate portion. When the insertion piece is inserted into the slit, the width on the first edge side of the slit into which the insertion piece is inserted first is wide. Thereby, in the initial stage of insertion of an insertion piece, the ratio of the width of the part which receives the insertion piece of a slit with respect to the thickness of an insertion piece is large, and it can insert an insertion piece into a slit comparatively easily. In addition, in the box sheet, the width on the second edge side of the slit is narrow, so that the gap in the width direction between the insertion piece and the slit becomes smaller as the insertion piece is inserted, and the insertion piece It is possible to prevent the accuracy and reliability of engagement with the slit from being lowered. Thus, the box sheet can reliably close the first cover plate portion as in the conventional case, and is relatively easy to close.

  The difference between the width on the first edge side and the width on the second edge side of the slit is preferably 0.5 mm or more and 2 mm or less. Thus, by setting the difference between the width on the first edge side and the width on the second edge side of the slit within the above range, the insertion piece can be easily formed into the slit when the first cover plate portion is closed. And unnecessary play and gaps can be prevented when closed. The “width on the first edge side” and the “width on the second edge side” refer to the first edge side and the second edge side edge of the region excluding the chamfered portion of the slit edge. It means width.

  The pair of insertion pieces may have a notch that engages with an end of the slit on the second edge side in the assembled state. In this way, the pair of insertion pieces have notches that engage with the second end edge side end portion of the slit in the assembled state, so that the closed state of the first lid plate portion can be more reliably achieved. Can be held.

  A sewing machine in which at least one of the first to fourth end edges of the bottom plate portion and the extension side end edges of the first to fourth side plate portions is formed between the pair of ruled lines and the pair of ruled lines. It should be composed of eyes. As described above, at least one of the first to fourth end edges of the bottom plate portion and the extension side end edges of the first to fourth side plate portions is between the pair of ruled lines and the pair of ruled lines. By being composed of the perforations to be formed, the sheet can be folded at a predetermined position without causing breakage of the sheet at the folding line. As a result, the box can be more reliably assembled into the shape as designed, the aesthetics and stability of the box are improved, and the first lid plate part is stabilized in its swinging axis, thereby the first lid plate. The closure of the part can be made easier.

  The length of the ruled line is preferably 5 mm or more and 25 mm or less. Thus, by setting the length of the ruled line within the above range, the sheet can be folded more accurately along the fold line, and breakage of the end of the fold line can be more reliably prevented.

  As described above, the box sheet of the present invention is relatively easy to close the lid plate when assembling the box.

It is a typical top view showing the sheet for boxes of one embodiment of the present invention. It is a typical perspective view of the box which assembles the sheet | seat for boxes of FIG. It is a typical enlarged plan view which shows the slit of the flap of the sheet | seat for boxes of FIG. FIG. 2 is a schematic plan view showing the middle of assembling the box sheet of FIG. 1. It is typical AA sectional view taken on the line of FIG.

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

[Box sheet]
The box sheet of FIG. 1 is an embodiment of the present invention, and can be assembled into a box having a bottom plate, a top plate, and a plurality of side plates as shown in FIG. A box formed by assembling the box sheet can be used to house pizza in pizza delivery.

  The box sheet is composed of a single cardboard sheet having a liner and a core. In FIG. 1, a thick line indicates a cut line obtained by cutting the cardboard sheet, and a thin line is formed by embossing the cardboard sheet. Show ruled lines. The portion of the thick line that appears as a broken line does not mean a hidden line or the like, but is a perforation that is intermittently cut into the cardboard sheet, and the cardboard sheet is actually cut at the part where the line exists. . Moreover, the cut part of this perforation may be a half cut in which the liner on one side of the cardboard sheet is not cut.

  The corrugated cardboard sheet forming the box sheet is a so-called double flute in which the core is sandwiched between three liners as well as a pair of liners sandwiched on both sides of one core. Alternatively, it may be a so-called single-sided cardboard in which a liner is attached only to one side of the core.

  The box sheet has first and second end edges 1a and 1b facing each other and third and fourth end edges 1c and 1d facing each other, and a bottom plate portion 1 forming a bottom plate in an assembled state, The first to fourth side plate portions 2, 3, 4, which are provided to extend from the first to fourth end edges 1a, 1b, 1c, 1d of the bottom plate portion 1 and constitute the side plates in the assembled state. 5 and first and second cover plate portions that extend from the extending side edges 2a and 3a of the first and second side plate portions 2 and 3 and constitute the top plate in an assembled state. 6 and 7 and the third and fourth side plate portions 4 and 5 are provided to extend from the end edges 4a and 5a on the extension side, respectively, and the first and second lid plate portions 6 and 7 in the assembled state. And a pair of flange portions 8 and 9 disposed on the lower side.

  The third and fourth side plate portions 4 and 5 are provided to extend from end edges 4b, 4c, 5b, and 5c on both sides in the extending direction and the vertical direction, and are arranged inside the side plate portions 2 and 3 in an assembled state. Folding pieces 10, 11, 12, and 13 are provided.

  The first cover plate portion 6 has a pair of insertion pieces 14 and 15 provided to extend from the vicinity of the edge 6a on the extending side of the edges 6b and 6c on both sides in the extending direction and the vertical direction. .

  The pair of flange portions 8 and 9 are formed along the extended edges 4a and 5a of the third and fourth side plate portions 4 and 5, and the insertion pieces 14 and 15 can be engaged in the assembled state, respectively. A pair of slits 16, 17.

  The slits 16 and 17 extend in the flange portions 8 and 9 with a slight inclination with respect to the third and fourth end edges 1c and 1d in a plan view, and both ends are bent and the third and fourth ends are bent. The side plate portions 4 and 5 are defined by cuts formed so as to be connected to the extended edges 4a and 5a.

  That is, as shown in FIG. 3, when the flange portions 8 and 9 are bent with respect to the side plate portions 4 and 5, the slits 16 and 17 are surrounded by the above-mentioned notches and the portions connected to the side plate portions 4 and 5 are the side plates. It is formed by being raised from the flange portions 8 and 9 integrally with the portions 4 and 5.

  In addition, the slits 16 and 17 are formed in a taper shape by extending the incision slightly with respect to the third and fourth end edges 1c and 1d. Specifically, the slits 16 and 17 have a width W1 on the first edge side larger than a width W2 on the second edge 1b side.

  In the box sheet, the corrugated board sheet is oriented so that the ridge line of the core extends in parallel to the extending direction of the first and second cover plate portions 6 and 7 (vertical direction in FIG. 1). Is preferred. By orienting the cores in this way, the risk of the first and second cover plate portions 6 and 7 being bent at positions other than the folding line due to the moment at the time of closing can be reduced.

<Bottom plate>
The bottom plate portion 1 is formed in a substantially square shape. The first to fourth end edges 1a, 1b, 1c, and 1d of the bottom plate portion 1 are each composed of a pair of ruled lines and perforations formed between the pair of ruled lines. That is, both end portions of the end edges 1a, 1b, 1c, 1d of the bottom plate portion 1 are defined by ruled lines, and intermediate portions of the end edges 1a, 1b, 1c, 1d of the bottom plate portion 1 are defined by perforations. These ruled lines and perforations function as folding lines that facilitate folding the first to fourth side plate portions with respect to the bottom plate portion 1.

  As a minimum of the length of the ruled line of the both ends of edge 1a, 1b, 1c, 1d of bottom board part 1, 5 mm is preferred and 8 mm is more preferred. On the other hand, the upper limit of the length of the ruled lines at both ends of the end edges 1a, 1b, 1c, and 1d of the bottom plate portion 1 is preferably 25 mm, and more preferably 20 mm. When the lengths of the ruled lines at both ends of the edges 1a, 1b, 1c, and 1d of the bottom plate part 1 are less than the above lower limit, the ruled lines at both ends of the edges 1a, 1b, 1c, and 1d of the bottom plate part 1, that is, the bottom plate There is a possibility that the corrugated cardboard sheet cannot be accurately folded along the folding line between the portion 1 and the side plate portions 2, 3, 4, and 5. Conversely, in order to bend the side plate portions 2, 3, 4, and 5 with respect to the bottom plate portion 1 when the length of the ruled lines at both ends of the edges 1a, 1b, 1c, and 1d of the bottom plate portion 1 exceeds the above upper limit. A large force is required, and the assembling property may be insufficient.

  The lower limit of the average length of the perforations at the center of the edges 1a, 1b, 1c, 1d of the bottom plate 1 is preferably 3 mm and more preferably 4 mm. On the other hand, the upper limit of the average length of the perforations at the center of the edges 1a, 1b, 1c, 1d of the bottom plate 1 is preferably 20 mm, more preferably 15 mm. If the average length of the perforations at the center of the edges 1a, 1b, 1c, and 1d of the bottom plate portion 1 is less than the lower limit, the corrugated board sheet may not be sufficiently bent. Conversely, if the average length of the perforations at the center of the edges 1a, 1b, 1c, and 1d of the bottom plate portion 1 exceeds the upper limit, the corrugated cardboard sheet breaks when the box sheet is assembled. There is a risk of creating an unnecessary gap.

  The lower limit of the ratio of the total length of the perforation cuts at the center of the edges 1a, 1b, 1c, and 1d of the bottom plate 1 to the total length of the perforation is preferably 0.3, and more preferably 0.4. On the other hand, the upper limit of the ratio of the total length of the perforation cuts at the center of the edges 1a, 1b, 1c, 1d of the bottom plate 1 to the total length of the perforation is preferably 0.7, more preferably 0.6. . If the ratio of the total length of the perforation cuts at the center of the edges 1a, 1b, 1c, 1d of the bottom plate 1 to the total perforation is less than the lower limit, the corrugated cardboard sheet may not be sufficiently bent. is there. On the contrary, when the ratio of the total perforation depth of the perforations at the center of the edges 1a, 1b, 1c, and 1d of the bottom plate portion 1 to the total perforation exceeds the above upper limit, the corrugated cardboard sheet may be broken. .

<Side plate>
The first to fourth side plate portions 2, 3, 4, and 5 have the same extension length and are each formed in a substantially rectangular shape.

  The extending side edges 2a and 3a of the first and second side plate portions 2 and 3 are composed of a pair of ruled lines and perforations formed between the pair of ruled lines. These ruled lines and perforations function as folding lines that make it easy to bend the first and second cover plate portions 6 and 7 with respect to the first and second side plate portions 2 and 3. The specific configuration of the end edges 2a, 3a on the extending side of these side plate portions 2, 3 can be the same as the end edges 1a, 1b, 1c, 1d of the bottom plate portion 1.

  On the other hand, the extended side edges 4a and 5a of the third and fourth side plate portions are formed of a pair of ruled lines formed at both ends thereof, and end portions of notches that define these ruled lines and slits 16 and 17, respectively. Perforations formed between the two. Further, this perforation is not formed between both ends of the slits forming the slits 16 and 17. That is, at the boundary between the third and fourth side plate portions and the pair of flange portions 8 and 9, a folding line composed of the ruled line and the perforation is formed except for the range of the slits 16 and 17.

  In addition, at the end edges 4a and 5a on the extending side of the third and fourth side plate portions, both end portions of the cuts defining the slits 16 and 17 are formed to be separated from the perforation cuts. Thereby, it can prevent that the edge part of the slits 16 and 17 becomes easy to tear.

  Further, short ruled lines extending from the end portions on the second end edge 1b side of the notches that define the slits 16 and 17 are formed on the extending end edges 4a and 5a of the third and fourth side plate portions. Yes. The ruled line continuous to the end of the slits 16 and 17 on the second edge 1b side is such that when the insertion pieces 14 and 15 are inserted into the slits 16 and 17, the ends of the slits 16 and 17 extend in the width direction. It is expanded, and it prevents that the notch which defines the slits 16 and 17 produces the fracture | rupture of the corrugated cardboard sheet | seat which extends to the 3rd and 4th side-plate parts 4 and 5.

  The lower limit of the length of the ruled line continuous to the end of the slits 16 and 17 on the second end edge 1b side is preferably 1.5 mm, and more preferably 2 mm. On the other hand, the upper limit of the length of the ruled line continuous to the end on the second end 1b side of the slits 16 and 17 is preferably 5 mm, and more preferably 4 mm. If the length of the ruled line continuous to the end of the slits 16 and 17 on the second edge 1b side is less than the lower limit, the effect of preventing breakage such that the slits defining the slits 16 and 17 extend is insufficient. There is a risk of becoming. Conversely, when the length of the ruled line continuing to the end of the slits 16 and 17 on the second edge 1b side exceeds the upper limit, the edge 4a on the extending side of the third and fourth side plate parts 4 and 5 is used. , 5a may be easily broken.

<Cover plate part>
The first and second cover plate portions 6 and 7 swing around the extending side edges 2a and 3a of the first and second side plate portions 2 and 3, respectively, and assemble the box sheet. A lid that can be opened and closed. The first and second cover plate portions 6 and 7 overlap with each other at the front end side in the extending direction in a state in which the box is closed. More specifically, after the second lid plate portion 7 is overlaid on the flange portions 8 and 9, the first lid plate portion 6 is placed on the flange portions 8 and 9 and the distal end portions of the second lid plate portion 7. Overlaid.

  The second lid plate portion 7 is formed with cut-outs 7a and 7b so that the widths on both sides of the extending end portion are narrowed. As shown in FIG. 4, the cutouts 7a and 7b are assembled so that the lid plate portion 7 does not block the slits 16 and 17 of the flange portions 8 and 9 when the box sheet is assembled to form a box. It is formed so that the part which may overlap with the slits 16 and 17 in a state is removed.

(Insertion piece)
The insertion pieces 14 and 15 are formed in a substantially square shape so as to extend from both side edges of the main body of the first lid plate portion 6, and a ruled line is formed between the plug pieces 14 and 15 and the main body of the first lid plate portion 6. Then, by being bent inward with respect to the main body of the first lid plate portion 6, it becomes possible to engage with the slits 16 and 17.

  These insertion pieces 14 and 15 are inserted into the slits 16 and 17 of the flange portions 8 and 9 in the assembled state of the box sheet, that is, in the sealed state of the box in which the box sheet is assembled. Thus, the closed state of the cover plate portion 6 is maintained.

  The end edge on the second end edge 1 b side in the assembled state of the insertion pieces 14, 15 is inclined so that the width on the extension side of the insertion pieces 14, 15 becomes narrow, and the first cover plate portion 6 The distance from the end on the side closer to the end edge 2a on the extension side of the first side plate part 2 serving as the axis of the swing becomes smaller toward the extension side. Accordingly, the insertion pieces 14 and 15 can be inserted by the swinging of the first lid plate portion 6.

  The lower limit of the average length of the insertion pieces 14 and 15 in the direction along the third and fourth edges 1c and 1d is preferably 30 mm, and more preferably 50 mm. On the other hand, the upper limit of the average length of the insertion pieces 14 and 15 in the direction along the third and fourth end edges 1c and 1d is preferably 100 mm, and more preferably 80 mm. If the average length of the insertion pieces 14 and 15 in the direction along the third and fourth edges 1c and 1d is less than the lower limit, the taper of the slits 16 and 17 cannot be optimized. The effect of facilitating insertion into the 15 slits 16 and 17 may be insufficient. Conversely, when the average length of the insertion pieces 14 and 15 in the direction along the third and fourth edges 1c and 1d exceeds the upper limit, the length of the slits 16 and 17 becomes too large. There is a possibility that the strength of the box in which the box sheet is assembled is insufficient.

  As a minimum of the average extension length from the main body of cover plate part 6 of plug pieces 14 and 15, 15 mm is preferred and 20 mm is more preferred. On the other hand, as an upper limit of the average extension length from the main body of the cover plate part 6 of the insertion pieces 14 and 15, 80 mm is preferable, and 60 mm is more preferable. When the average extension length from the main body of the cover plate part 6 of the insertion pieces 14 and 15 is less than the lower limit, it may not be easy to insert the insertion pieces 14 and 15 into the slits 16 and 17. On the contrary, when the average extension length from the main body of the cover plate part 6 of the insertion pieces 14 and 15 exceeds the said upper limit, sealing work may become complicated.

  The insertion pieces 14 and 15 are notches 14a that engage with the end portions of the slits 16 and 17 on the second edge 1b side in the assembled state in order to more reliably hold the cover plate portion 6 in the closed state. , 15a.

  The notches 14a and 15a have an opening width approximately twice the thickness of the corrugated cardboard sheet from the ruled line at the boundary with the main body of the first lid plate portion 6, and the edge on the main body side of the first lid plate portion 6 Is inclined, and the edge of the first lid plate 6 opposite to the main body is formed in a substantially trapezoidal shape substantially parallel to the ruled line of the boundary with the first lid plate 6 main body, The length of the bottom edge is equal to or greater than the thickness of the cardboard sheet. That is, as shown in FIG. 5, the notches 14a and 15a have the second edge of the slits 16 and 17 at the edge opposite to the main body of the first lid plate portion 6 in the assembled state of the box sheet. The insertion pieces 14 and 15 are prevented from coming out of the slits 16 and 17 by being locked to the inner surfaces of the flange portions 8 and 9 on the 1b side.

  The lower limit of the depth in the direction along the third and fourth edges 1c, 1d of the notches 14a, 15a (the length of the edge opposite to the main body of the first lid plate portion 6) is preferably 2 mm. 3 mm is more preferable. On the other hand, the upper limit of the depth in the direction along the third and fourth edges 1c and 1d of the notches 14a and 15a is preferably 8 mm, and more preferably 5 mm. When the depth in the direction along the third and fourth edges 1c, 1d of the notches 14a, 15a is less than the lower limit, the engagement with the slits 16, 17 of the insertion pieces 14, 15 becomes insufficient. There is a possibility that the sealed state of the box formed by assembling the box sheet cannot be maintained. On the other hand, when the depth in the direction along the third and fourth edges 1c, 1d of the notches 14a, 15a exceeds the upper limit, the insertion pieces 14, 15 are removed from the main body of the first lid plate portion 6. There is a risk of tearing.

<Flange part>
The flange portions 8 and 9 are bent with respect to the third and fourth side plate portions 4 and 5 so as to extend above the bottom plate portion 1 in the assembled state of the box sheet. The first and second cover plate portions 6 and 7 are overlapped on the flange portions 8 and 9 to seal the gap between the boxes for assembling the box sheet.

(slit)
Since the slits 16 and 17 of the flange portions 8 and 9 are formed in a tapered shape in which the width W1 on the first edge 1a side is larger than the width W2 on the second edge 1b side, the first lid plate When sealing the box in which the box sheet is assembled by swinging the portion 6, the end on the first edge 1 a side of the extension edge of the insertion pieces 14, 15 is first slitted 16 and 17 are inserted into the wide portions on the first edge 1a side. For this reason, the insertion sheet | seats 14 and 15 can be inserted in the slits 16 and 17 comparatively easily at the time of the said sheet | seat for boxes.

  Further, since the slits 16 and 17 have a tapered shape with a narrow width W2 on the second edge 1b side, when the first lid plate portion 6 is completely closed, 2 is held by the slits 16 and 17 to prevent the first cover plate portion 6 from rattling.

  The lower limit of the width W2 on the second edge 1b side of the slits 16 and 17 is preferably 0.8 times the average thickness of the corrugated cardboard sheet constituting the box sheet, and more preferably 0.9 times. On the other hand, the upper limit of the width W2 on the second edge 1b side of the slits 16 and 17 is preferably 1.2 times the average thickness of the corrugated cardboard sheet constituting the box sheet, more preferably 1.1 times. . If the width W2 on the second edge 1b side of the slits 16 and 17 is less than the lower limit, it may not be easy to completely insert the insertion pieces 14 and 15 into the slits 16 and 17. On the other hand, when the width W2 on the second edge 1b side of the slits 16 and 17 exceeds the upper limit, the insertion pieces 14 and 15 are not sufficiently held by the slits 16 and 17, and the first cover plate portion 6 is removed. There is a risk of rattling.

  The lower limit of the difference between the width W1 on the first edge 1a side and the width W2 on the second edge 1b side of the slits 16 and 17 is preferably 0.5 mm, and more preferably 0.8 mm. On the other hand, the upper limit of the difference between the width of the slits 16 and 17 on the first edge 1a side and the width W2 on the second edge 1b side is preferably 2 mm, more preferably 1.5 mm. When the difference between the width W1 on the first edge 1a side and the width W2 on the second edge 1b side of the slits 16, 17 is less than the lower limit, the insertion pieces 14, 15 to the slits 16, 17 Insertion may not be facilitated sufficiently. On the contrary, when the difference between the width W1 on the first edge 1a side and the width W2 on the second edge 1b side of the slits 16 and 17 exceeds the upper limit, the insertion pieces 14 and 15 by the slits 16 and 17 are used. There is a risk that the first cover plate portion 6 will be rattled.

  The lengths of the slits 16 and 17 are the lengths in the direction along the third and fourth edges 1c and 1d at the extension side of the notches 14a and 15a of the insertion pieces 14 and 15 (insertion). The maximum of the lengths of the pieces 14 and 15 in the direction along the third and fourth edges 1c and 1d) and below, the third at the back of the notches 14a and 15a of the insertion pieces 14 and 15 And it is preferable to set it as more than the length of the direction in alignment with 4th edge 1c, 1d. Thus, by making the length of the slits 16 and 17 within the above range, the insertion pieces 14 and 15 can be easily inserted into the slits 16 and 17, and the slits 16 and 17 of the insertion pieces 14 and 15 are made. Engagement with is ensured.

<Advantages>
When the width W1 on the first edge 1a side of the slits 16 and 17 is larger than the width W2 on the second edge 1b side, the box sheet has a pair of holes by the first cover plate portion 6 swinging. When the insertion pieces 14 and 15 are inserted, the width of the region into which the insertion pieces 14 and 15 are inserted at the beginning of the slits 16 and 17 is wide. Thereby, in the initial stage of insertion of the insertion pieces 14 and 15, the widths of the slits 16 and 17 are relatively wide, and the insertion pieces 14 and 15 can be inserted into the slits 16 and 17 relatively easily.

  Further, in the box sheet, since the width W2 on the second edge 1b side of the slits 16 and 17 is narrow, the insertion pieces 14 and 15 and the slit 16 are inserted as the insertion pieces 14 and 15 are inserted. , 17 is reduced in the width direction, and the insertion pieces 14, 15 are engaged with the slits 16, 17 accurately and reliably, and the first lid plate 6 is firmly gripped and closed. Can be locked to.

  Further, the box sheet includes first to fourth end edges 1a, 1b, 1c, 1d of the bottom plate portion 1 and end edges on the extending side of the first to fourth side plate portions 2, 3, 4, 5. 2a, 3a, 4a, 5a, that is, a fold line between the bottom plate portion 1 and the first to fourth side plate portions 2, 3, 4 and 5, and the first and second side plate portions 2, 3 and the first And the folding line between the second lid plate portions 6 and 7 and the folding line between the third and fourth side plate portions 4 and 5 are respectively between a pair of ruled lines and the pair of ruled lines. The perforation formed in the. As a result, when the box sheet is assembled, the corrugated cardboard sheet can be accurately folded along a planned folding line, and the end of the folding line is hardly broken. For this reason, the said box sheet | seat can be reliably assembled in the box of the shape as designed, and the aesthetics and stability of the box after an assembly improve. Further, the box in which the box sheet is assembled is inserted by stabilizing the swing axis of the first lid plate portion 6 (folding of the edge 2a on the extension side of the first side plate portion 2). The closing operation of the first cover plate portion 6 for inserting the pieces 14 and 15 into the slits 16 and 17 can be further facilitated.

[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 planar shape of the bottom plate portion of the box sheet and the box formed by assembling the box sheet is not limited to a rectangular shape as in the above embodiment, and may be other shapes such as an octagonal shape. When the bottom plate portion of the box sheet and the plane shape of the box assembled with the box sheet are octagonal, the remaining side plates can be formed by a known modification of the configuration of the folding pieces and the like. it can.

  In the box sheet, the first to fourth end edges of the bottom plate portion and the extension side edges of the first to fourth side plate portions may be formed only of ruled lines or perforations.

  The shape of the first cover plate portion is such that, in the illustrated embodiment, the end edge on the extending side is curved into a shape, and there is a design effect, but in a state where the box in which the box sheet is assembled is closed Any shape may be used as long as the tip portion of the first lid plate overlaps the tip portion of the second lid plate portion to eliminate the gap.

  In the box sheet, the extension length of the second lid plate portion is short, and in the assembled state, the first lid plate portion substantially overlaps the extension side edge of the second side plate portion, that is, the first The planar shape of one lid plate portion may be substantially equal to the planar shape of the bottom plate portion. In this case, a further slit may be provided in the second lid plate portion, and a further insertion piece may be provided at the end edge of the first lid plate portion on the extending side.

  In the box sheet, the first cover plate portion may have an insertion piece at any position on both side edges.

  The box sheet of the present invention is suitably used to form a box having a small height, such as a pizza box.

DESCRIPTION OF SYMBOLS 1 Bottom plate part 1a, 1b, 1c, 1d End edge 2,3,4,5 Side plate part 2a, 3a, 4a, 5a End edge 4b, 4c, 5b, 5c on the extension side Edges 6, 7 Lid 6a, 7c Edges 6b, 6c on the extending side Edges 7a, 7b on both sides in the extending direction and perpendicular direction Cut-off 8, 9 Flange 10, 11, 12, 13 Folded pieces 14, 15 Insertion Pieces 14a and 15a Notches 16 and 17 Slit W1 First edge side width W2 Second edge side width

Claims (5)

A sheet for a box made of a single sheet and assembled into a box having a bottom plate, a top plate, and a plurality of side plates,
A bottom plate portion having first and second opposing edges and third and fourth opposing edges and forming a bottom plate in an assembled state;
First to fourth side plate portions that extend from the first to fourth end edges of the bottom plate portion and constitute side plates in an assembled state;
First and second lid plates that are provided to extend from the extending side edges of the first and second side plates, respectively, and constitute a top plate in an assembled state;
A pair of flange portions provided to extend from end edges on the extending side of the third and fourth side plate portions and arranged below the first and second lid plate portions in the assembled state. ,
In the pair of flange portions, a slit is formed along the edge on the extending side of the third and fourth side plate portions,
The first cover plate portion has a pair of insertion pieces that can be engaged with the slits in an assembled state,
A box sheet, wherein a width of the slit on the first edge side is larger than a width on the second edge side.   The box sheet according to claim 1, wherein the difference between the width on the first edge side and the width on the second edge side of the slit is 0.5 mm or more and 2 mm or less.   The box sheet according to claim 1 or 2, wherein the pair of insertion pieces has a notch that engages with an end portion on a second end edge side of the slit in an assembled state.   A sewing machine in which at least one of the first to fourth end edges of the bottom plate portion and the extension side end edges of the first to fourth side plate portions is formed between the pair of ruled lines and the pair of ruled lines. The box sheet according to claim 1, 2, or 3, comprising eyes.   The box sheet according to claim 4, wherein the length of the ruled line is 5 mm or more and 25 mm or less.

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