JP5571965B2 - Paper container and paper container blank - Google Patents

Description

  The present invention relates to a box-shaped paper container and a paper container blank used for the assembly thereof.

  A paper container assembled from a paper blank is, for example, a shield end carton described in Patent Document 1 (hereinafter simply referred to as “paper container”) as one that can be easily opened. In the paper container described in Patent Document 1, a knob portion that is operated at the time of opening is provided on the rear plate in a shape of a knob portion cut line, and a direction crossing the ceiling plate from both ends of the knob portion cut line. In addition, the unsealed lines are also continuously extended.

  According to this paper container, when opening it, first, the knob part is lightly pressed with a finger so that the knob part cut line is broken and the knob part is opened. Then, together with this knob, picking the ceiling plate and the top plate that overlaps it, pulling them up, the tear line in the ceiling plate is torn, part of it is separated from the ceiling plate, The paper container is opened.

JP-A-2005-206168

  However, since the paper container of Patent Document 1 described above has a corner portion where the connecting portion between the rear plate and the ceiling plate is bent at a right angle, the rigidity of the corner portion is large, and the knob portion is near the corner portion. The cut becomes difficult to break. For this reason, even if it pushed in the knob part, there existed a problem that progress of a fracture | rupture of a knob part cut line will be interrupted in the above-mentioned corner part vicinity.

  Moreover, if the break of the knob break line is interrupted in this way, the progress of the break from the knob break line to the unsealed break line cannot be propagated smoothly. If it is lifted together with the ceiling plate, for example, the ceiling plate may be torn at a part different from the unsealed line, or the picking part may be torn off from the ceiling plate without being opened, or other unexpected inconveniences may occur. There was a problem that the paper container could not be opened smoothly.

  Therefore, the present invention was made to solve the above-described problems, and when the indentation region portion and the separation region portion are separated along the separation line, the breakage of the cut off portion of the separation line is performed. An object of the present invention is to provide a paper container and a paper container blank that can be smoothly advanced from the pushing area side to the separation area side beyond the corner of the paper container.

In order to achieve this object, a paper container according to claim 1 is a box-shaped paper container body, an opening formed in the paper container body, and the first and first of the paper container body facing each other across the opening. Two wall plates, an inner lid plate that is openably and closably connected to the first wall plate via a first broken line, and closes the opening, and is superposed and joined to the outer surface of the inner lid plate to close the opening. And an outer lid plate connected to the second wall plate through a second broken line so as to be openable and closable, and further adjacent to the inner lid plate as a part of the first wall plate. A push-in area formed so as to be separable from the first wall plate via a separating line connecting two points separated from each other on the first broken line; and the push-in area as a part of the inner lid plate The tip of the inner lid plate on the side opposite to the first polygonal line from the two points on the first polygonal line Through the line of separation is further extended with a spacing to the edge, and a separation area part which is separably formed from said inner lid plate, a plurality of penetrating the paper thickness direction to said separation line breaks are alternately disposed and the cross section, that is a plurality of cuts includes the two separation promoting cuts, two separation promoting cuts thereof, from the starting point on the front edge of the pushing region portion It extends along the front edge ridge line and both side ridge lines of the indentation area portion, and reaches the end point on both side ridge lines of the separation area portion beyond the two points on the first broken line.

  The paper container according to claim 2 is the paper container according to claim 1, wherein the start point of the two separation promoting cuts is two points on the leading edge ridge line of the indented region portion and located inward from both ends of the leading edge ridge line. Each has reached.

  The paper container according to claim 3 is the paper container according to claim 1 or 2, wherein the separation line includes a separation inducing line provided between start points of the two separation promotion cuts along a tip ridge line of the indentation region portion, Two separation end lines that are respectively connected to the end points of the two separation promoting cuts and that are provided along the both-side ridge lines of the separation region portion to the tip edge on the side opposite to the first folding line of the inner lid plate. The separation end line and the separation inducing line are formed by perforations arranged in a plurality of broken lines.

  The paper container according to claim 4 is the paper container according to claim 3, wherein the separation trigger line is formed by one cut portion or two cut portions and one cut between them instead of the separation trigger line. In addition, instead of the separation end line, a separation end line formed by one cut portion or two cut portions and one cut between them is provided.

  A paper container according to a fifth aspect is the paper container according to the third or fourth aspect, wherein the cut of the separation trigger line is formed longer than the cut of the separation end line.

  The paper container blank of claim 6 is used for assembling and forming the paper container of any one of claims 1 to 5. Therefore, according to the paper container blank of this claim 6, the technical features provided by any of the paper containers of claims 1 to 5 are inevitably brought. Therefore, the paper container of any of these claims 1 to 5 is provided. It brings about the same operation and effect.

  According to the paper container and the paper container blank of the present invention, the opening portion of the paper container body is closed by covering the inner cover plate and the outer cover plate that are connected to the first wall plate and the second wall plate, respectively. At this time, the opening overlaps the outer surface of the inner lid plate bent with respect to the first wall plate at the first folding line with the outer lid plate bent with respect to the second wall plate at the second folding line. To be sealed.

  On the other hand, in order to open the paper container sealed in this way, the pushing area part is pushed into the paper container body, and the to-be-cut part on the leading edge line of the pushing area part is broken by this pushing force. The indented region is separated from the first wall plate along the separation line by breaking the cut portion. When the pushing area portion is separated from the first wall plate, the first wall plate is formed with a through hole from which the pushing area portion has been removed.

  Then, if a finger is inserted into the paper container main body from this through hole and the separation region portion is pressed outward from the inner surface side of the inner lid plate with the finger, both side ridge lines of the separation region portion are obtained by this pressing force. The to-be-cut part to be cut is broken, and the separation region part is separated from the inner lid plate along the separation line by the break of the to-be-cut part.

  When the separation region portion is separated from the inner lid plate in this way, the outer lid plate superimposed on the outer surface of the inner lid plate is scraped from the inner lid plate together with the separation region portion, and the inner lid plate and The paper container sealed with the outer lid plate is opened.

  Here, the separation line of the indentation region portion and the separation region portion is that each cut portion is broken, so that the respective cut lines that were originally independent from each other are connected to each other into a long continuous break. It has come to grow.

  In other words, in the separation line, this rift progresses from the front edge ridge line of the indentation area portion to the both side ridge lines and the first fold line to the front edge of the inner lid plate on the side opposite to the first fold line side. Thus, the pushing area portion is separated from the first wall plate and the separation area portion is separated from the inner lid plate.

  In particular, the two separation-promoting cuts provided in the separation line are extended from the starting point on the tip ridge line of the indentation region along the ridge line on both sides of the indentation region, and exceed the two points on the first folding line. Further, it reaches the end point in the middle of the ridge lines on both sides of the separation region. For this reason, if the to-be-cut part on the front-end ridgeline of an indentation area part is all ruptured, the crack which the several cut | interruption joined together exceeds two points on a 1st broken line, and both sides ridgeline of a separation area part It becomes the appearance which reaches at a stretch until the middle of.

  Therefore, even if the force for pushing the pushing area portion is small, as long as the to-be-cut portion on the tip ridge line of the pushing area portion can be broken, the tear in the separation line is pushed without being interrupted in the vicinity of the first broken line. It progresses smoothly and at a stretch from the region side to the separation region side beyond the first broken line.

  In addition, since the two separation promoting lines are cuts across the corners caused by the first wall plate and the inner lid plate being bent at the first broken line, the progress of the tear is in the vicinity of the first broken line. It can propagate from the pushing area side to the separation area side without being obstructed by the corner. Therefore, the pressing force required for separating the separation region portion from the inner lid plate can be reduced, and the separation region portion can be easily separated.

  According to the paper container of claim 2, the start point of the two separation promoting cuts is on the tip ridge line of the indentation region portion, and reaches two points located inward from both ends of the tip ridge line of the indentation region portion. Yes. For this reason, there is a cut portion of the indentation region portion between the start points of the two separation promoting cuts, and as a result, the cut portion of the separation line related to the indentation region portion is locally unevenly distributed. . Accordingly, the force for pushing the pushing region portion is concentrated on the unevenly distributed portion of the cut portion. As a result, the cut portion of the separation line related to the pushing region portion is efficiently broken, and the pushing region portion is made the first wall plate. Can be separated from

  Moreover, the start points of the two separation promoting cuts are on the tip ridge line of the indentation region portion, and have reached two points located inward from both ends of the tip ridge line, and the tip in the indentation region portion has already been reached. There is a cut at the joint (connecting part) between the ridge line and the ridge lines on both sides. Therefore, when the break of the separation line propagates from the tip ridge line of the indentation region portion to the both side ridge lines, the break of the separation line can be smoothly advanced without being interrupted at the joint between the tip ridge line and the both side ridge lines. it can.

  According to the paper container of claim 3, except for the two separation promoting cuts, the separation trigger line and the separation end line are formed by perforations in which a plurality of cuts are arranged in a broken line shape. For this reason, even if the two separation promoting cuts are relatively long cuts that extend from the tip ridge line of the indentation region part to the ridge lines on both sides of the separation region part, the fine cut-off parts existing in the separation trigger line and the separation end line Therefore, it is possible to prevent a decrease in rigidity around the separation line of the paper container in the unopened state.

  According to the paper container of claim 4, the separation trigger line or the separation end line or both of them are formed by one cut portion, or by two cut portions and one cut between them. Therefore, since the number of the to-be-cut portions is reduced, it is possible to reduce the pushing force required for breaking the to-be-cut portion of the push-in region.

  According to the paper container of the fifth aspect, since the separation trigger line is formed longer than the separation end line, the separation trigger line has a larger interval between the separation trigger lines. Is easier to separate than the separation end line, and the tear of the separation line is likely to progress. On the other hand, since the separation end line is shorter than that of the separation inducing line and is not easily broken, the separation initiating line is prevented from being easily broken due to twisting of the paper container.

  According to the paper container and the paper container blank of the present invention, the separation line that is broken when the paper container is opened has two separation-promoting cuts from the start point on the front edge ridge line of the indented area part on both sides of the indented area part. It extends along the ridgeline and extends beyond two points on the first broken line to the end point in the middle of the ridgelines on both sides of the separation region. For this reason, if all the to-be-cut parts on the front end ridge line of the indentation area part are broken, at that time, the split of the separation line exceeds the two points on the first broken line and the ridge lines on both sides of the separation area part. You can reach it all at once. Therefore, when the indentation area portion and the separation area portion are separated along the separation line, the breakage of the to-be-cut portion of the separation line can be smoothly performed from the indentation area side to the separation area portion side beyond the corner of the paper container. The effect is that the paper container can be easily opened.

It is an expanded view of the paper container blank used in order to assemble the paper container which is one Example of this invention. (A) is an enlarged view of a portion A in FIG. 1, in which the separation line is virtually removed from the paper container blank to illustrate the outline of the separation piece, and (b) is illustrated in FIG. 1. FIG. 2 is an enlarged view of a portion A of FIG. 2, in which a separation line and a separation piece formed thereby are enlarged. It is the bottom side perspective view of the paper container assembled using the paper container blank, Comprising: The bottom face board side of the said paper container is perspectived upward. FIG. 4 is a perspective view illustrating a state in which one opening of the paper container in the state illustrated in FIG. 3 is opened, and is a perspective view with the upper surface plate side of the paper container facing upward. It is an expanded view of the paper container blank of 2nd Example. FIG. 5A is an enlarged view of a portion A in FIG. 5, in which the separation line is virtually removed from the paper container blank to illustrate the outline of the separation piece, and FIG. FIG. 2 is an enlarged view of a portion A of FIG. 2, in which a separation line and a separation piece formed thereby are enlarged.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a developed view of a paper container blank 1 used for assembling a paper container 50 (see FIG. 3) according to an embodiment of the present invention. In the figure, all crease lines L provided on the paper container blank 1 are shown. Is shown by a one-dot chain line (the same applies hereinafter).

  As shown in FIG. 1, the paper container blank 1 is a development of a paper container 50, and is assembled into a hexahedral box-shaped paper container 50 (see FIG. 3). The paper container blank 1 to be the paper container 50 uses a single highly rigid laminated paper material as a material.

  The high-rigidity laminated paper material used as the material of the paper container blank 1 is a cardboard base paper, white paperboard, chip ball, yellow ball or other high-rigidity multilayer paperboard. For example, a high-stiffness laminated paper material having a basis weight of about 160 gram square meters to 2700 gram square meters may be used.

  The paper container blank 1 includes a top plate 2, a bottom plate 3, a pair of side wall plates 4 and 4, a pair of outer lid plates 5 and 5, a pair of inner lid plates 6 and 6, and an adhesive margin plate 7 Four insertion plates 8, 8,... Are provided, and among these plates 2 to 8, each inner lid plate 6, paste margin plate 7 and each insertion plate 8 are trapezoidal. The remaining plates 2 to 5 are formed in a rectangular shape. Moreover, as for each board 2-8 of the paper container blank 1, the adjacent thing is provided in a row so that it can be bent via the crease line (fold part) L. As shown in FIG.

  Specifically, two rectangular outer cover plates 5 and 5 can be bent one by one through the crease line L on the two short sides (upper and lower sides in FIG. 1) of the upper surface plate 2 and can be opened and closed. Two rectangular side wall plates 4, 4 are connected to the two long sides (left and right sides in FIG. 1) of the upper surface plate 2 so that they can be folded one by one through the crease line L. It is installed.

  Here, each crease line L connecting the upper surface plate 2 and the outer lid plates 5 and 5 is hereinafter referred to as an “outer lid crease line La”. Further, one insertion plate 8 is connected to each of the short sides at both ends in the longitudinal direction (upper and lower sides in FIG. 1) of the pair of side wall plates 4 and 4 so as to be foldable via a crease line L. .

  Further, two trapezoidal inner lid plates 6 and 6 are connected to the two short sides of the bottom plate 3 (upper and lower sides in FIG. 1) one by one through the crease line L so as to be openable and closable. Has been. A side wall plate 4 connected to the long side on the right side of the top plate 2 is connected to one long side (left side in FIG. 1) of the bottom plate 3 so as to be foldable via a crease line L. On the other long side (right side in FIG. 1), the adhesive margin plate 7 is continuously provided via a crease line L so as to be bendable. Hereinafter, each fold line L connecting the bottom plate 3 and each inner lid plate 6 is referred to as an “inner fold line Lb”.

  Thus, the paper container blank 1 has two continuous portions of the bottom plate 3 and the inner lid plates 6 and 6, and the bottom plate 3 and the inner lid plate 6 are provided in any of the continuous portions. , 6 and a separation piece 20 that is separated from the paper container blank 1 when the paper container 50 is opened, as will be described later, through the separation line 10.

  The two separation lines 10 in the paper container blank 1 are point-symmetric with respect to the center (center of gravity) of the bottom plate 3, and the separation pieces 20 in two places on the paper device blank 1 are also in the bottom plate 3. It is point-symmetric with respect to the center (center of gravity).

  Here, the separation piece 20 includes a pushing area portion 21 that can be separated from the bottom plate 3 via the separation line 10 and a separation area portion 22 that can be separated from the inner lid plate 6 via the separation line 10. The pushing area portion 21 and the separation area portion 22 are connected to each other via the inner lid fold line Lb.

  The pushing area portion 21 is a part of the bottom plate 3 adjacent to the inner lid plate 6 and is provided at a central position in the short side direction (left and right direction in FIG. 1) of the bottom plate 3 and can be pressed with a fingertip. It is formed in the shape of a tongue having a certain area. The separation region portion 22 is a part of the inner lid plate 6 adjacent to the pushing region portion 21 and is provided at a central position in the long side direction (left and right direction in FIG. 1) of the inner lid plate 6. It is formed in a trapezoidal shape.

  Next, the details of the separation line 10 and the separation piece 20 will be described with reference to FIG. FIG. 2A is an enlarged view of a portion A in FIG. 1, and the separation line 10 is virtually removed from the paper container blank 1, so that the separation piece 20 (the pushing region portion 21 and the separation region portion 22) is removed. FIG. 2 (b) is an enlarged view of a portion A in FIG. 1, and is an enlarged view of the separation line 10 and the separation piece 20 formed thereby.

  As shown in FIG. 2 (a), the indentation region portion 21 has an arcuate tip ridge line 21 a that becomes the contour line of the distal end of the indentation region portion 21 and contour lines on both sides in the width direction of the indentation region portion 21. Two straight side ridgelines 21b and 21b (hereinafter also referred to as “both ridgelines”) are provided.

  Further, the both side ridge lines 21b and 21b extend in parallel with the direction perpendicular to the inner lid crease line Lb (vertical direction in FIG. 1) from both end points P and P of the tip ridge line 21a toward the inner lid crease line Lb. All are orthogonal to the inner lid fold line Lb. The two intersections Q and Q of the ridge lines 21b and 21b on both sides of the pushing area 21 and the inner lid fold line Lb are separated from each other on the inner lid fold line Lb, and the two intersections Q and Q are separated from each other. Hereinafter, it is referred to as “separation midpoints Q and Q”.

  The separation region portion 22 includes two side ridgelines 22a and 22a (hereinafter, also referred to as “both ridgelines”) which are contour lines on both sides in the width direction of the separation region portion 22 and these both ridgelines 22a and 22a. Is extended from the separation midpoints Q and Q toward the tip edge 6a of the inner lid plate 6 in a square shape in plan view, and two points R spaced apart from each other on the side of the tip edge 6a of the inner lid plate 6 , R (hereinafter referred to as “separation end points R, R”) (see FIG. 1).

  As shown in FIG. 2 (b), the separation line 10 mainly includes two separation promotion lines 11, 11, one separation induction line 12, and two separation end lines 13, 13. ing. The separation line 10 is on each line included in the outline of the separation piece 20 described above, that is, on the line of the front edge ridge line 21a and the both side ridge lines 21b and 21b of the pushing area part 21 and the both side ridge lines 22a and 22a of the separation area part 22. It is provided along each of these lines 21a, 21b, 22a. Further, the separation line 10 includes a plurality of cuts Ct and a plurality of cut portions Sh, and is configured by alternately arranging a plurality of these cuts Ct and cut portions Sh.

  Here, each of the cut lines Ct of the separation line 10 is formed to penetrate in the paper thickness direction of the paper container blank 1, and each of the cut portions Sh is not penetrated in the paper thickness direction of the paper container blank 1. ing. In particular, the plurality of cut lines Ct in the separation line 10 include the two separation promotion lines 11 and 11 described above. Each of the separation promoting lines 11 is a continuous cut Ct provided one by one symmetrically on both sides in the width direction of the separation piece 20, and is formed to be extremely longer than other cuts Ct existing in the separation line 10. ing.

  In addition, each separation promoting line 11 has a cut start point 11s which is a start point of the cut Ct on the line of the tip ridge line 21a of the pushing region portion 21, and the tip ridge line 21a and the side ridge line of the pushing region portion 21 from the cut start point 11s. It extends continuously along the line 21b and reaches the cut end point 11e in the middle of the side edge line 22a of the separation region 22 beyond each separation middle point Q.

  Here, the cut start point 11s of each separation promoting line 11 exists on the tip ridge line 21a of the push-in region 21, and is located inward (inner side) from both end points P of the tip ridge line 21a. ing. That is, each separation promoting line 11 is a cut Ct that is on the tip ridge line 21a of the push-in region 21 and reaches the position from the end point P of the tip ridge line 21a to the center of the tip ridge line 21a.

  In addition, a separation-inducing line 12 is provided between the break start points 11 s and 11 s of the separation promoting lines 11 and 11 along the tip ridge line 21 a of the push-in region 21. This separation-inducing line 12 is a part of the separation line 10 and has two cuts Ct shorter than the separation promotion line 11 and three cut portions Sh shorter than the cut Ct. A plurality of cut lines Ct are formed between the cut parts Sh in a broken line shape.

  The cut-off portion Sh of the separation trigger line 12 should be broken first when the push-in area 21 is pushed when the paper container 50 is opened, and all the cut-off portions Sh of the separation trigger line 12 are cut off. By being broken, the breaking (break) of the separation line 10 is not interrupted at the corner of the paper container 50 having the inner lid crease line Lb, and the side ridge line of the separation region portion 22 of the inner lid plate 6 from the bottom plate 3. It progresses at a stretch to the cut end point 11e of the separation promoting line 11 on the line 22a.

  In addition, the start point of the separation end line 13 is connected to the break end point 11 e of each separation promotion line 11. Each separation terminal line 13 is provided from the cut end point 11e of each separation promoting line 11 to each separation end point R at the leading edge 6a of the inner lid plate 6 along the side ridge line 22a of the separation region portion 22. Each separation terminal line 13 has a plurality of cuts Ct exceeding the number of separation trigger lines 12 and a plurality of cut portions Sh, and the cuts Ct are formed in broken lines between the cut portions Sh. A plurality of perforations are formed.

  By the way, the separation end line 13 is such that each cut Ct is slightly longer than each cut portion Sh. Further, the cut Ct of the separation end line 13 is formed shorter than the cut Ct of the separation trigger line 12, and the cut portion Sh of the separation lead line 13 is as long as the cut portion Sh of the separation trigger line 12. Is formed. That is, in the separation end line 13 and the separation inducing line 12, the separation inducing line 12 has a cut Ct longer than the separation end line 13.

  For this reason, the separation end line 13 has a smaller cut Ct length per unit length than the separation-inducing line 12, and as a result, the cut-off portion Sh length per unit length is longer than the separation-inducing line 12. Accordingly, the shear strength is larger than that of the separation-inducing line 12, and inadvertent breakage due to twisting of the paper container 50 is prevented.

  On the other hand, with respect to the separation inducing line 12, the cut portion Sh length per unit length is shorter than the separation end line 13, and the cut Ct length per unit length is increased. The shear strength is smaller than that of the end line 13, and the to-be-cut portion Sh is easily broken when the pushing region portion 21 is pushed.

  Based on the relationship with the separation line 10 configured as described above, the pushing region portion 21 and the separation region portion 22 of the separation piece 20 will be described. The pushing region portion 21 has two separation midpoints Q and Q. A part of the two separation promotion lines 11, 11 passing through, a separation trigger line 12 connected between the break start points 11s, 11s of the two separation promotion lines 11, 11, and the two separation middle points Q, Q It can be said that it is a part surrounded by a part of the inner lid fold line Lb between them.

  For the separation region 22, the inner lid crease line Lb between the two separation middle points Q and Q, and the anti-inner crease line Lb of the inner lid plate 6 through the two separation middle points Q and Q. The remaining part of the two separation promoting lines 11, 11 extending in a C shape toward the tip edge 6 a on the side, and the inner lid plate from the cut end points 11 e, 11 e of the separation promoting lines 11, 11 The two separation end lines 13 and 13 extending in a C shape toward the tip end edge 6a of the 6 and the inside of the separation end lines 13 and 13 between the two separation end points R and R that the separation end lines 13 and 13 reach. It can be said that it is a part surrounded by a part of the front edge 6a of the cover plates 6 and 6.

  Referring back to FIG. 1, the description of the separation line 10 configured in this way is based on the function of the first separation line 10 </ b> A for separating the push-in area 21 from the bottom plate 3, and the separation area 10. The part 22 is divided into second separation lines 10 </ b> B and 10 </ b> B for separating the inner cover plate 6 from the inner cover plate 6.

  The first separation line 10A referred to here corresponds to the portion connecting the two separation midpoints Q and Q along the tip ridge line 21a and the both side ridge lines 21b and 21b of the push-in region 21, The separation lines 10B and 10B correspond to the portions provided along the two side ridge lines 22a and 22a of the separation region 22.

  The second separation lines 10B and 10B are two straight lines extending from each separation middle point Q and Q to each separation end point R and R in a non-intersecting state and spaced apart from each other. From the separation midpoints Q and Q to the separation end points R and R, it is gradually increased in a letter C shape.

  Therefore, according to the second separation lines 10B and 10B, when the separation region 22 is scraped from the inner lid plate 6 and the opening 52 is opened, the separation line is provided along the inner lid fold line Lb. The breaking resistance is reduced as compared with the case where the separation line extends from the separation middle points Q and Q to the front end edge 6a of the inner lid plate 6 at regular intervals.

  When the separation region portion 22 is separated from the inner lid plate 6 (see FIG. 4), the opening size of the through hole communicating with the opening portion 51 formed in the inner lid plate 6 is on the upper surface plate 3 side of the paper container 50. Since the width becomes wider as the distance is closer, when the contents are taken out from the storage space of the paper container 50, the lateral width of the through hole necessary for inserting the hand into the through hole can be sufficiently secured.

  In addition, the inner lid plate 6 has an outer surface (front side in FIG. 1 on the front side of FIG. 1) which is a superimposed joint surface with the outer lid plate 5, but the above-described separation region portion 22 and a portion excluding the separation region portion 22 (hereinafter referred to as the following) Since the adhesive is applied to both of the non-separating regions 23, 23, the broken cut line 24 extends across both the separating region 22 and the non-separating regions 23, 23. A plurality of lines are formed in parallel with the inner lid fold line Lb.

  The plurality of cut lines 24 are cuts formed on the adhesive application surface in a non-penetrating state in the thickness direction of the highly rigid laminated paper material. According to the plurality of cut lines 24, when an adhesive is applied to the inner surface of the inner lid plate 6, the adhesive enters the respective cut lines 24, so that the adhesive droops from above the inner lid plate 6. Can be prevented.

  Further, when the paper container 50 is sealed, when an adhesive is applied to the inner lid plate 6 and pressed against the outer lid plate 5, the adhesive enters each cut line 24 at that time, and thus the application range. Excessive expansion is suppressed, and the adhesive can be prevented from flowing between the outer lid plate 5 and the inner lid plate 6.

  FIG. 3 is a bottom perspective view of the paper container 50 assembled using the paper container blank 1 described above, and is a perspective view with the bottom plate 3 side of the paper container 50 facing upward.

  To assemble the paper container 50 shown in FIG. 3 using the paper container blank 1 shown in FIG. 1, first, the top plate 2, the bottom plate 3, the side wall plates 4, 4, the glue allowance of the paper container blank 1 shown in FIG. After the plate 7 is bent along each crease line L connecting them together, one side wall plate 4 (the left side in FIG. 1) and the adhesive margin plate 7 are bonded with an adhesive. Thus, the paper container main body 51 is formed.

  Here, the paper container main body 51 is the basis of the paper container 50 formed by the upper surface plate 2, the bottom surface plate 3, the side wall plates 4, 4 and the glue plate 7 among the respective plates 2 to 8 of the paper device blank 1 described above. It is a box-like body excluding the outer lid plates 5 and 5, the inner lid plates 6 and 6, and the four insertion plates 8. In addition, in the paper container main body 51, an accommodation space is formed in which four surfaces are covered with the above-described plates 2 to 4.

  The storage space of the paper container body 51 is a space for storing contents, and the remaining two surfaces of the storage space are opened as openings 52 and 52 (see FIG. 4). Each opening 52 communicates with the accommodation space of the paper container main body 51 and is closed using the inner lid plate 6, the outer lid plate 5, and the insertion plate 8 as shown in FIG. In FIG. 4, only one of the two openings 52 is shown.

  Then, after the paper container body 51 is formed, for each opening 52, the insertion plate 8, the inner lid plate 6 and the outer lid plate 5 of the paper container blank 1 are connected to each crease line L (the inner lid crease line). Lb and outer lid crease line La.) Are folded in this order so as to overlap from the inner side of the paper container body 51, and each is closed.

  At this time, when an adhesive is applied to the outer surface of each inner lid plate 6 and each outer lid plate 5 folded on these inner lid plates 6 is superimposed, each outer lid plate 6 has an outer surface. The inner surface of the cover plate 5 is bonded (bonded) to form the paper container 50 shown in FIG. 3, and each opening 52 is closed and sealed.

  As shown in FIG. 3, the paper container 50 using the paper container blank 1 described above is formed in a hexahedron, and a predetermined stamp 9 is provided on the bottom plate 3 of the paper container 50 in the vicinity of each indentation region portion 21. It is recessed one by one. These two marks 9 and 9 represent the character string “OPEN” and are indications for instructing to push the pushing area portion 21 when the paper container 50 is opened. Since the paper container 50 (paper container blank 1) is formed of a highly rigid laminated paper material, for example, the necessary markings are given without depending on printing by denting the paper surface plastically by pressing.

  FIG. 4 is a perspective view illustrating a state in which one opening 52 of the paper container 50 in the state shown in FIG. 3 is opened, and is a perspective view with the upper surface plate 3 side of the paper container 50 facing upward.

  As shown in FIG. 4, at both ends in the longitudinal direction of the paper container main body 51, openings 52 that communicate with the above-described accommodation space are formed. The opening 52 is for storing and taking out the contents accommodated in the paper container 50 and has a rectangular shape in front view surrounded by the top plate 2, the bottom plate 3 and the pair of side wall plates 4 and 4. It is open. Further, the bottom plate 3 and the top plate 2 constituting the paper container body 51 are opposed to each other with the opening 52 interposed therebetween.

  As described above, each opening 52 is closed by covering the two insertion plates 8, the inner lid plate 6 and the outer lid plate 5 in an overlapping manner, and the outer surfaces of the inner lid plates 6 and 6. The outer lid plate 5 that is coated with an adhesive and bent toward the inner lid plate 6 is superposed and bonded (bonded) to be sealed.

  Next, a method for opening the paper container 50 shown in FIG. 4 will be described. First, when the pushing region portion 21 of the paper container 50 is pushed into the paper container main body 51, each cut portion Sh of the separation trigger line 12 of the separation line 10 is broken, and all of the separation trigger lines 12 are cut off. When the portion Sh is broken, the indentation region portion 21 is separated from the bottom plate 3 along the separation line 10, and the breaking of the separation line 10 progresses to the break end points 11e and 11e of the separation promoting lines 11 and 11 at a stretch. (See FIG. 2 (b)).

  Thus, by separating the pushing area portion 21 from the bottom plate 3, a through hole from which the pushing region portion 21 is removed is formed in the bottom plate 3. Then, when a finger is inserted into the paper container main body 51 from the through hole and the separation region portion 22 is pressed outward from the inner surface side of the inner lid plate 6 with the finger, the separation line 10 has already been broken. Since it has progressed to the cut end points 11e and 11e of the separation promoting lines 11 and 11, thereafter, the cut portions Sh of the separation end lines 13 and 13 are sequentially broken, so that the separation region portion 22 is separated from the separation line 10. Along the inner lid plates 6 and 6 (see FIG. 1).

  And when all the to-be-cut | disconnected parts Sh of each separation end line 13 and 13 are fractured | ruptured along the both-side ridgelines 22a and 22a of the isolation | separation area | region part 22, the isolation | separation area | region part 22 will be isolate | separated completely from the inner cover board 6. FIG. Then, as shown in FIG. 4, the separation region portion 22 is scraped from the inner lid plate 6 together with the outer lid plate 5 while being overlapped and joined to the inner surface of the outer lid plate 5. And the opening part 52 of the paper container 50 closed and sealed by the outer cover plate 5 is opened.

  Moreover, since a plurality of broken cut lines 24 are formed on the outer surface of the inner lid plate 6, the surface layer portion of the highly rigid laminated paper material that is the material of the inner lid plate 6 is easily peeled off. ing. For this reason, when the paper container 50 is opened, when the separation piece 20 is separated from the bottom plate 3 and the inner lid plate 6, the non-separation regions 23, 23 of the inner lid plates 6, 6 are separated together with the separation region portion 22. The surface layer portions 23a and 23a can be peeled off. Therefore, the proof of opening can be left in the paper container 50 that has been opened once.

  Next, a modification of the above embodiment will be described with reference to FIGS. FIG. 5 is a development view of the paper container blank 100 of the second embodiment, and FIG. 6A is an enlarged view of a portion A of FIG. 5, and the separation line 10 is virtually removed from the paper container blank 100. Thus, the outline of the separation piece 20 (the pushing region portion 21 and the separation region portion 22) is illustrated, and FIG. 6B is an enlarged view of a portion A in FIG. Is an enlarged view of the separation piece 20 formed by

  The paper container blank 100 according to the second embodiment is different from the paper container blank 1 according to the first embodiment described above by changing the separation-inducing lines and the two separation-promoting lines. The form of is changed. In the following, the same parts as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different parts are described.

  As shown in FIGS. 5 and 6, in the paper container blank 100 of the second embodiment, one half (the left side in FIG. 6 (a)) of the leading edge ridge line 21 a of the push-in area 21 protrudes into an asymmetric shape. Therefore, the separation-inducing line 12 provided along the tip ridge line 21a is also a left-right asymmetric curve with a half on one side (left side in FIG. 6B) protruding.

  For this reason, as shown in FIG. 6B, the to-be-cut portion Sh of the separation triggering line 12 is unevenly distributed in one half on the line of the tip ridge line 21a of the pushing region portion 21, and thereby the pushing region. When the portion 21 is pushed into the paper container 50, the force is locally concentrated on a part of the separation trigger line 12, so that the cut portion Sh of the separation trigger line 12 is easily broken.

  The present invention has been described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be easily made without departing from the spirit of the present invention. It can be guessed.

  For example, in the above-described embodiment, the cut start point 11s of the separation promoting line 11 is located on the inner side of the end point P of the tip edge line 21a on the tip edge line 21a of the push-in area 21. The position of the cut start point 11s is not necessarily limited to this. For example, the cut start point 11s may coincide with the end point P of the tip edge line 21a of the push-in region 21.

  Moreover, in the said Example, although the paper container blank 1100 was formed with one highly rigid laminated paper material, the number of the highly rigid laminated paper materials used for a paper container blank is not necessarily limited to one sheet. Alternatively, a paper container blank may be formed using a plurality of highly rigid laminated paper materials. Furthermore, in the above embodiment, the form of the paper container 50 has been described as a hexahedron. However, the form of such a paper container is not necessarily limited to this, and for example, a pentahedron, a heptahedron, and other polyhedrons are adopted as the form of the paper container. May be.

  In the above embodiment, when the inner lid plate 6 and the outer lid plate 5 of the paper container 50 are sealed, the outer lid plate 6 is bonded to both the outer surface of the separation region portion 22 and the outer surfaces of the non-separation regions 23 and 23. The outer lid plate 5 is superposed and adhered by applying the agent, but the form of the superposition adhesion is not necessarily limited to this, and for example, the location where the adhesive is applied is the outer surface of the separation region portion 22 of the inner lid plate 6. Or the non-adhesion between the inner surface of the outer lid plate 5 and the inner lid plate 6 compared to the adhesive strength (bonding strength) between the inner surface of the outer lid plate 5 and the outer surface of the separation region portion 22 of the inner lid plate 6. You may make it weaken the adhesive force with the outer surface of the isolation | separation area | regions 23 and 23 relatively.

  Moreover, in the said Example, the front-end ridgeline 21a of the pushing area | region part 21 of the isolation | separation piece 20 is a left-right symmetric arch shape (refer FIG. 2), or the left-right asymmetric curve shape which protruded to the one side (refer FIG.6 (b)). However, the shape of the leading edge ridge line of the indented region and the shape of the separation inducing line of the separation line are not necessarily limited to these, for example, a mountain shape or other broken line shape, a straight line shape, a circle shape, etc. An arc shape, an elliptical arc shape, etc. may be sufficient. That is, it is sufficient that at least the planar shape of the push-in region 21 has an area that can be pressed with a fingertip.

  Moreover, in the said Example, the part along the both-side ridgelines 21b and 21b of the pushing area | region part 21 in the separation line 10, and the both-side ridgelines 22a and 22a of the separation area | region part 22 is linear (refer FIG.1 and FIG.5). Although described as being, these forms are not necessarily limited to this, and may be, for example, curved lines or broken lines.

  Moreover, in the said Example, the separation induction line 12 demonstrated the case where it was a perforation shape with the cut | interruption Ct provided in total one two between each said to-be-cut part Sh and the said to-be-cut part Sh. However, the form of the separation trigger line is not necessarily limited to such a perforated shape.

  For example, only one cut portion is provided between the cut start points of each separation promoting line, or two cut portions are provided between the cut start points of each separation promoting line, and one cut is made between the cut portions. It may include what is not perforated like the one provided, or four or more parts to be cut are provided between the cut start points of each separation promoting line, and 1 between the cut parts. A plurality of cuts provided one by one may be provided.

  Moreover, the said Example demonstrated the case where each isolation | separation terminal line 13 was a perforation shape with several cut | interruption part Sh and several cut | interruption Ct provided one by one between each said cut | disconnection part Sh. However, the form of the separation end line is not necessarily limited to such a perforated shape.

  For example, between the cut end point and the separation end point of the separation promoting line, only one cut-off portion is provided and this is used as a separation end line, or two cut-off portions are provided and 1 between the cut-off portions. For example, a perforation may be included, such as providing two cuts as separation end lines.

  Below, the paper container of the 1st-4th modification which is a modification of this invention is shown.

  The paper container of the first modified example is a paper container according to any one of claims 1 to 5 and is formed of a highly rigid multi-layer paperboard, so that a part of the separation line is long like two separation promoting cuts. Even if the cut is provided, the rigidity strength of the paper container itself can be sufficiently secured. In addition, when the paper container is formed of multi-layer paperboard, the inner cover plate and the outer cover plate have a strong bonding force to overlap the inner cover plate and the outer cover plate, compared to the bonding force between the laminated papers inside the multi-layer paperboard. The laminated paper in the surface layer portion of the cover plate is easy to peel off.

  Therefore, when the overlapping bonding force between the inner lid plate and the outer lid plate is made larger than the bonding force between each laminated paper in the multi-layer paperboard as a paper container material by increasing the bonding strength of the bonding agent, etc. When the area part is separated from the inner lid plate, the surface layer portion of the non-separated area part of the inner lid plate is peeled off while being bonded to the outer lid plate. Since the separation line cardboard is also thinned, the separation line on both side ridge lines of the separation region can be broken even with a small force.

  The paper container of the second modified example is any one of claims 1 to 6, or the paper container of the first modified example, wherein the separation line has an interval between portions provided along both side ridge lines of the separation region portion. It is gradually increased from the two points on the broken line toward the tip edge on the side opposite to the first broken line of the inner lid plate.

  The paper container of the third modification is any one of claims 1 to 6, or the paper container of the first or second modification, wherein only the separation region portion of the inner lid plate is joined to the outer lid plate. Therefore, the amount of the bonding agent to be used can be reduced. Further, since the outer lid plate is not joined to the non-separation region portion of the inner lid plate, it is not necessary to peel off the joint between the outer lid plate and the non-separation region portion of the inner lid plate. Therefore, the paper container can be opened by separating the separation region portion from the inner lid plate with a small force.

  The paper container according to a fourth modification is the paper container according to any one of claims 1 to 6, or the paper container according to the first to third modifications, wherein the inner lid plate includes the separation region portion and a portion excluding the inner region of the inner lid plate. Both of which are also superposed and joined to the outer lid plate, and the joining strength between the separation region portion and the outer lid plate is the ratio between the portion excluding the separation region portion and the outer lid plate. It is larger than the bonding strength. Therefore, it is possible to avoid a situation where the separation of the separation region portion from the inner lid plate is hindered because the joining force between the non-separation region portion of the inner lid plate and the outer lid plate is too strong.

1,100 Paper container blank 2 Top plate (second wall plate)
3 Bottom plate (first wall plate)
4, 4 Side wall plate 5, 5 Outer lid plate 6, 6 Inner lid plate 6a Tip edge of inner lid plate (tip edge on the side opposite to the first folding line of the inner lid plate)
10 Separation line 10A 1st separation line (separation line which separates pushing area part from 1st wall board)
10B Second separation line (separation line separating the separation region portion from the second wall plate)
11, 11 Separation promotion line (separation promotion break)
11s cut start point (start point of separation promotion cut)
11e Cut end point (separation promoting cut end point)
12 Separation inducement lines 13 and 13 Separation end line 21 Pushing area part 21a Tip edge line (tip edge line of pushing area part)
21b, 21b side ridge line (both ridge lines in the indentation area)
22 Separation area 22a, 22a side ridge line (both ridge lines of the separation area)
23 Non-separation area part (excluding the separation area part of the inner lid plate)
23a Surface layer portion 50 of non-separation region portion Paper container 51 Paper container body 52 Opening portion La Outer cover fold line (second fold line)
Lb Inner lid fold line (first fold line)
Ct Cut Sh Cut part P, P End point of the tip ridge line (both ends of the tip ridge line of the push-in area)
Q, Q Separation midpoint (two points apart on the first broken line)
R, R Separation end point (intersection of separation line and tip edge of inner lid plate on the side opposite to the first fold line)

Claims (6)

A box-shaped paper container body, an opening formed in the paper container body, the first and second wall plates of the paper container body facing each other across the opening, and a first fold line in the first wall plate An inner lid plate that is openably and closably connected via an opening and closing the opening, and is overlapped and joined to the outer surface of the inner lid plate so as to close the opening via a second broken line. In a paper container provided with an outer lid plate that is continuously openable and closable,
A part of the first wall plate is provided adjacent to the inner lid plate, and is formed to be separable from the first wall plate via a separation line connecting two spaced points on the first broken line. Indentation area, and
As a part of the inner lid plate, it is provided adjacent to the push-in region, and further extends from the two points on the first fold line to the tip edge on the side opposite to the first fold line of the inner lid plate. A separation region portion formed so as to be separable from the inner lid plate via the separation line provided;
Wherein the separation line is a plurality of cuts through the paper thickness direction is alternately disposed with the cross section, it includes a two separation promoting cuts in the plurality of cuts,
Each of the two separation promoting cuts extends from the start point on the tip ridge line of the indented region portion along the tip ridge line and both side ridge lines of the indented region portion, and exceeds the two points on the first broken line. A paper container that reaches the end point on both sides of the separation area.   2. The start point of the two separation promoting cuts reaches each of two points located on the tip ridge line of the indentation region portion and inward from both ends of the tip ridge line. Paper container. The separation line is connected to the separation trigger line provided between the start points of the two separation promotion cuts along the front edge ridge line of the indentation region part and the end points of the two separation promotion cuts, respectively. Two separation terminal lines provided to the tip edge on the side opposite to the first fold line of the inner lid plate along both side ridge lines of the portion,
The paper container according to claim 1 or 2, wherein the separation end line and the separation inducing line are formed by a plurality of perforations arranged in a broken line shape. The paper container according to claim 3,
Instead of the separation trigger line, a separation trigger line formed by one cut portion or by two cut portions and one cut between them,
A paper container comprising a separation end line formed by one cut portion or two cut portions and one cut between them instead of the separation end line.   5. The paper container according to claim 3, wherein the cut of the separation trigger line is formed longer than the cut of the separation end line.   A paper container blank used for assembling and forming the paper container according to claim 1.

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