JP2007045502A - Paper box with lock hinge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To hold an opening state so that a lid does not return to the original closing direction by the resilience of paper or the like after a paper box is opened. <P>SOLUTION: The paper box with a lock hinge is equipped with a lid for unsealing composed of cut-off lines 6, 6 formed close to both side surface plates 2, 2 opposed to each other on an upper surface plate 5, cut-off lines 7, 7 formed continuously to the cut-off lines 6, 6 on the outside front surface plate 1a of double front surface plate 1, cut lines 9, 9 for forming the hinge continuously over the upper surface plate 5 and the back surface plate 3 opposed to each other on the back surface plate 3 side of the upper surface plate 5, fold lines 10, 10 formed parallel to the back surface plate 3 continuously to the cut-off lines 6, 6 to the outside opposing to the cut lines 9, 9 of the upper surface plate 5, and fold lines 11 connecting the end of the cut lines 9, 9 formed parallel to the fold lines 10, 10 on the back surface plate 3. The paper box with the lock hinge has a lock hinge function by inserting or returning an edge line 12 formed of the surface plates of the upper surface plate 5 and the back surface plate 3 oppositely inside the opposing cut lines 9, 9. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a paper box for storing and packaging foods, pharmaceuticals, and the like, and to a paper box with a lock hinge provided with an opening lid with a lock hinge on an upper surface plate of the paper box.

  Conventionally, there are various forms of hexahedron-shaped paper boxes for storing and packaging foods, pharmaceuticals, and the like, and there are also various forms in the structure of the opening lid for opening the paper box.

  For example, as shown in FIG. 5 (a), a double front plate 1 (1a, 1b) consisting of an outer plate 1a and an inner plate 1b, both side plates 2, 2, a back plate 3, and a bottom plate 4 There is a paper box composed of the upper surface plate 5, and the upper surface plate 5 is formed with opposing separating lines 6, 6 adjacent to the side surface plates 2, 2, and on the outer plate 1 a of the double front plate 1. The cut lines 7 and 7 are formed continuously with the cut lines 6 and 6, and the crease 10 is provided on the back plate 3 side of the upper surface plate 5 and continuous with the cut lines 6 and 6 in parallel with the back plate 3. It has been.

  When opening the paper box, first, in FIG. 5 (a), the opposing separating lines 7, 7 formed on the outer side plate 1a of the double front plate 1 are broken, and the opposing separating lines 7, 7 are cut off. After the opposing inner outer plate 1a is cut off from the inner plate 1b of the front plate 1 and the cut lines 6 and 6 of the upper plate 5 are continuously cut off, the upper plate 5 is removed as shown in FIG. By folding through the crease 10, an opening 13 is formed in the paper box so that it can be opened.

  When re-covering the paper box after opening, the top plate 5 is bent through the fold line 10 to close the opening 13 of the paper box, and the outer plate 1a of the closed top plate 5 is used as the inner plate 1b of the front plate 1. The front end portion 1c of the outer side plate 1a can be resealed by being inserted into the insertion line 8 for insertion.

  However, in the unsealed paper box as described above, the upper surface plate 5 is folded through the entire length of the fold line 10 so that the upper surface plate 5 is opened when accurate folding along the fold line 10 is not performed. There is a problem in that it does not open correctly and tends to return to the original closing direction due to paper repulsion and the like, making it difficult to take out the contents.

Below, the well-known literature relevant to this invention is described.
Title: Paper container and construction (p. 25, p. 236), publisher: Packaging Co., Ltd., issue date: April 15, 1985

  An object of the present invention is to eliminate the above-mentioned inconvenience by allowing an opened state to be maintained so as not to return to the original closing direction due to paper repulsion or the like after the paper box is opened.

The invention according to claim 1 of the present invention is a hexahedron-shaped paper box comprising a double front plate 1, two side plates 2, 2, a back plate 3, a bottom plate 4, and a top plate 5. 2, opposing separating lines 6, 6 provided close to 2, and opposing separating lines 7, 7 provided continuously to the separating lines 6, 6 on the outer front plate 1 a of the double front plate 1, Opposite hinge forming cut lines 9, 9 provided continuously on the back plate 3 side of the top plate 5 across the top plate 5 and the back plate 3, and the cut line 9 of the top plate 5.
9, the folds 10, 10 provided parallel to the back plate 3 continuously to the separation lines 6, 6 on the opposite outer side of the, 9, and the cut lines 9 provided on the back plate 3 parallel to the folds 10, 10. And a ridge line portion formed by a double-sided plate of the upper surface plate 5 and the rear surface plate 3 on the opposite inner side of the opposing cut lines 9, 9. 12 is a paper box with a lock hinge.

  The invention according to claim 2 of the present invention is a hexahedron-shaped paper box comprising a double front plate 1, two side plates 2, 2, a back plate 3, a bottom plate 4, and a top plate 5. 2, provided adjacent to the separation lines 6, 6 along the boundary line between the opposing separation lines 6, 6 provided close to 2 and the front outer plate 1 a of the double front plate 1 and the upper surface plate 5. The cut lines 7, 7, the cut lines 7 a projecting from the opposite ends of the cut lines 7, 7 to the front outer plate side, and the upper plate 5 and the rear plate 3 on the rear plate 3 side of the upper plate 5. The opposing hinge-forming cut lines 9, 9 provided continuously, and the cut lines 9, 9 on the upper surface plate 5 opposite to the cut lines 9, 9 are continuous to the separation lines 6, 6 and parallel to the back plate 3. An opening lid portion comprising folds 10 and 10 provided and a fold 11 connecting the ends of the cut lines 9 and 9 provided on the back plate 3 in parallel with the folds 10 and 10; A paper box with a lock hinge having a lock hinge function by a ridge line portion 12 formed by a double-sided plate of an upper surface plate 5 and a back plate 3 on the opposite inner side of the opposite cut lines 9, 9. It is.

  According to the paper box with a lock hinge of the present invention, on the back plate 3 side of the top plate 5, there are provided hinge-forming cut lines 9, 9 that are continuously opposed across the top plate 5 and the back plate 3, On the outer side of the top plate 5 opposite to the cut lines 9, 9, folds 10, 10 are provided in parallel to the back plate 3, continuous to the cut lines 6, 6. 10 is provided with a fold line 11 connecting the ends of the cut lines 9 and 9 in parallel to 10 to form a lid for opening, the opposing cut lines 6 provided in parallel to the side plates 2 and 2 on the upper surface plate 5, 6 and the cut line 7, 7 provided continuously to the cut line 6, 6 on the outer front plate 1 a of the double front plate 1, and the top plate 5 is opened in the opening direction through the fold 10. When folded and raised and opened, the double-sided plate (both sides) of the top plate 5 (the extended portion of the top plate 5) and the back plate 3 on the inside of the opposing cut lines 9, 9 are opposed to each other. Since the ridge line portion 12 with a right angle inner angle formed by the continuous folds) is folded back in the right angle angle direction and fits into the paper box, the opened upper surface plate 5 maintains its unsealed state. Can do.

  Further, according to the paper box with a lock hinge of the present invention, when the top plate 5 is folded in the closing (sealing) direction through the fold 10 and resealed after opening, the opposing cut lines 9 and 9 The ridgeline portion 12 that is reversely folded by the double-sided plate (folded line of the double-sided plate) between the upper surface plate 5 (the extended portion of the upper surface plate 5) and the back plate 3 on the opposite inner side is the original upper surface plate 5 (upper surface). The upper surface plate closed in order to return to the outside of the paper box as the ridgeline portion 12 with a right angle inner angle formed by the double-sided plate (the fold line where the double-sided plate is continuously provided) between the back plate 3 and the extended portion of the face plate 5 5 can maintain the blocked state.

  The paper box with a lock hinge of the present invention will be described in detail below in accordance with an embodiment thereof. FIG. 1 (a) is an overall perspective view of the paper box of the present invention, and includes an outer plate 1a and an inner plate 1b. This is a hexahedral paper box comprising a double front plate 1, two side plates 2, 2, a back plate 3, a bottom plate 4, and a top plate 5.

  The upper surface plate 5 is formed with opposing separating lines 6, 6 adjacent to the side surface plates 2, 2, and the outer front plate 1 a of the double front plate 1 has the separating lines 6, 6. Continuing to each other, opposing separating lines 7 are formed.

On the back plate 3 side of the top plate 5, there are formed hinge forming cut lines 9, 9 that continuously face the top plate 5 and the back plate 3. On the opposite outside of the lines 9, 9,
The folds 10 and 10 are formed in parallel to the back plate 3 continuously to the separation lines 6 and 6.

  The back plate 3 is formed with folds 11 connecting the ends of the cut lines 9 and 9 in parallel with the folds 10 and 10 and is provided with a lid for opening.

  In the case of opening the paper box of the present invention, in FIG. 1 (a), first, the opposing separation lines 7 and 7 formed on the front outer side plate 1a constituting the double front plate 1 are cut off to face each other. The protruding front outer plate 1a facing inside the separation lines 7 and 7 is pulled up and separated from the front inner plate 1b constituting the front plate 1, and further, the separation lines 6 and 6 of the upper surface plate 5 are continuously broken. After opening, as shown in FIG. 1B, the upper surface plate 5 is bent and raised in the opening direction through the fold 10 which is a fixed position.

  As a result, the extended plate 5a extending to the upper surface plate 5 is raised and rotated in a direction perpendicular to the inside of the paper box with the fold 10 at a fixed position as the center. Following this, the back hinge plate 3a continuously connected to the back plate 3 inside the opposed cut lines 9, 9 via the fold 11 is placed inward of the paper box via the fold 11 at a fixed position. The corner of the paper box that is bent in a horizontal direction or a substantially horizontal direction (an inclination direction approximating horizontal) and formed by a double-sided plate of an extended plate 5a and a rear hinge plate 3a that extends to the top plate 5 The ridgeline portion 12 (a crease b, which will be described later, in which a double-sided plate is continuously provided) moves inward, and the corner portion of the right-angled inner corner of the paper box is reversely folded into the paper box.

  Here, the rotation center of the crease 10 and the crease 11 in the paper box is at a fixed position, and the separation distance is constant. Further, a ridge line portion 12 constituting a corner portion of a right angle inner corner of a paper box formed by a double-sided plate of an extended plate 5a extending to the upper surface plate 5 and a back hinge plate 3a (a fold line to be described later in which the double-sided plates are continuously provided). The eye b) is formed by the fold line 10 as a fixed point (fixed position), the fold line 11, and the ridge line part 12 having a perpendicular inner angle as a moving point that can be moved by the opposing cut lines 9 and 9. It corresponds to a right angle portion corresponding to a right triangle.

  The ridge line portion 12 has the folding plate corresponding to the hypotenuse of the right triangle shorter than the total length via the extension plate 5a and the back hinge plate 3a corresponding to the total length of two sides sandwiching the right angle of the right triangle. The distance between the straight line connecting the rotation centers of the eye 10 and the crease 11 is forcibly overcome and moved. Therefore, the ridgeline portion 12 and the back hinge plate 3a and the extending plate 5a sandwiching the ridgeline portion 12 are locked to move outwardly from the paper box, and are kept in a reverse folded state and a fitted state, and extend the extending plate 5a. The upper surface plate 5 (lid body) to be provided is locked in its raised state and the open state of the paper box is maintained.

  In the paper box of the present invention, as shown in FIG. 1 (b), after opening, the top plate 5 is folded in the closing (sealing) direction (horizontal direction) through the fold 10 to close (reseal) the paper box. ), The extension plate 5a of the upper surface plate 5 rotates in the horizontal direction outwardly of the paper box around the fold line 10, and the back hinge plate 3a follows the fold line 11 to follow the paper box outward. It is bent vertically. At the same time, the ridgeline portion 12 that is reversely fitted is shorter than the total length via the extension plate 5a and the back hinge plate 3a corresponding to the total length of two sides sandwiching the right angle of the right triangle. The paper box is forcibly moved over a straight line connecting the rotation centers of the fold line 10 and the fold line 11 corresponding to the hypotenuse of a right triangle, and folded in a normal direction as an outer corner of the paper box. Returns to the original state at. For this reason, the ridgeline portion 12 and the back hinge plate 3a and the extending plate 5a sandwiching the ridgeline portion 12 are locked to move inward of the paper box, and a folded state constituting a corner portion of a normal right angle corner as a paper box is formed. The upper surface plate 5 (lid) that is held and extends the extended plate 5a is locked in its horizontal state, and the closed state of the paper box is maintained.

In addition, the paper box of the present invention has the above-mentioned opposite incision when the top plate 5 is folded in the closing (sealing) direction through the crease 10 and resealed after opening as shown in FIG. Double-sided plate of the upper surface plate 5 and the extended plate 5a on the inner side opposite to the wires 9 and 9 and the rear hinge plate 3a connected to the rear plate 3 via the fold line 11 (folds where the double-sided plates are connected) The ridgeline portion 12 that is reversely bent by the ridgeline is formed by a double-sided plate (a fold line in which the double-sided plates are connected) of the original upper surface plate 5 (the extended portion of the upper surface plate 5) and the back surface plate 3 The upper surface plate 5 that returns to the outside of the paper box as the portion 12 and is bent and closed in the closing direction can maintain the closed state.

  After opening and resealing in this way, the outer side plate 1b of the closed top plate 5 is stacked on the outside of the front plate 1 (inner side plate 1b), and the tip 1c of the outer side plate 1a is inserted. It can be resealed by inserting it into the cut line 8.

  As described above, the opening lid portion of the paper box with the lock hinge of the present invention includes the upper surface plate 5 and the extended plate 5a on the opposite inner side of the opposing cut lines 9, 9 and the rear hinge plate 3a of the rear plate 3. The ridgeline portion 12 formed by the double-sided plate is held in an open state by a fitting operation, and a closed state is held by a return operation, and has a lock hinge function.

  An example of a blank sheet (development view) used for assembling and boxing a paper box with a lock hinge according to the present invention will be described with reference to FIG. 3. The front outer plate 1 a constituting the front plate 1, the upper plate 5, and the back The face plate 3, the bottom plate 4, and the front inner plate 1b constituting the front plate 1 are connected in series through parallel folds a, b, c, d, and are necessary as shown in the figure. Accordingly, the upper surface inner plate 5b of the upper surface plate 5 may be connected to the outside of the front inner plate 1b via the fold line e.

  Side outer plates 2a and 2a constituting side plates 2 and 2 are connected to both sides of the top plate 5 through folds f, respectively, and both sides of the back plate 3 are connected to folds g respectively. Flap plates 3b and 3b are connected to each other, and side surface inner plates 2b and 2b constituting the side surface plate 2 are connected to both sides of the bottom surface plate 4 via folds h, respectively. On both sides, flap plates 1e and 1e are connected to each other via a fold line i.

  On the upper surface plate 5, adjacent separating lines 6, 6 adjacent to the side surface outer plates 2 a, 2 a are cut lines (or straight lines) of a shape pattern in which bent lines as shown in the figure are arranged intermittently and regularly. Is intermittently and linearly cut as a cut line of a perforated shape pattern arranged regularly and intermittently along a fold a that is a boundary line between the front outer plate 1a and the upper plate 5. The cut lines 7 and 7 are intermittently formed as a cut line of a shape pattern in which bent lines as shown in the figure are intermittently and regularly arranged (or a cut line of a perforated shape pattern in which straight lines are intermittently and regularly arranged). The front outer plate 1a is cut with a U-shaped cut line 7a protruding from the opposite end of the separating lines 7 and 7 toward the front outer plate 1a. A protruding front outer plate 1a having a U-shape or the like protruding continuously is formed.

  Note that the front outer plate 1a such as the U-shape is hooked with a finger or a nail on the front end portion 1c side of the front outer plate 1a such as a U-shape in the front outer plate 1a. 1d is formed by punching as necessary.

  The continuous arrangement pattern of the interrupting lines constituting the opposing separation lines 6 and 6 that are cut into the upper surface plate 5 is not particularly limited in the present invention. For example, as shown in the drawing, By arranging them in parallel with each other in parallel, the arrangement of the separation lines 6, 6, the separation lines 7, 7, and the folds 10, 10 is formed in a rectangular shape as a whole. It may be arranged in a trapezoidal shape as a whole. Further, the continuous arrangement pattern of the intermittent lines may be a bent line arrangement.

Opposing hinge-forming cut lines 9 and 9 are provided continuously from the back plate 3 side of the top plate 5 to the back plate 3, and are provided on the outside of the top plate 5 opposite the cut lines 9 and 9. Are formed with folds 10 and 10 parallel to the direction (fold b) of the back plate 3 continuous with the opposing separating lines 6 and 6.

  Embossed portions 9a and 9a facing each other are provided on the upper surface plate 5 facing the opposite score lines 9 and 9 as needed to reinforce the rigidity of the paper. The folds 11 parallel to the folds 10 and 10 are formed on the back plate 3 on the inner side opposite to the nine and nine.

  In addition, the line shape of the opposing cut lines 9 and 9 is not particularly limited in the present invention. For example, the cut lines 9 and 9 may be curved lines that are curved in a convex shape toward the inner side as illustrated. Alternatively, straight lines facing each other in parallel may be used, or facing straight lines that expand or narrow in the direction from the top plate 5 to the back plate 3 may be used.

  A front inner plate 1b constituting the front plate 1 is provided with a cut line 8 for insertion for inserting and locking the front end portion 1c of the protruding front outer plate 1a such as a U-shape.

  If the order of assembling and boxing the paper box with the lock hinge of the present invention is described below using the blank sheet shown in FIG. 3, first, it is necessary via the folds a, b, c, and d. Accordingly, the front outer plate 1a, the upper plate 5, the rear plate 3, the bottom plate 4, and the front inner plate 1b are bent into a cylindrical shape in the same direction through the fold e, and the front side is faced to the inner surface side of the front outer plate 1a. The inner plate 1b is overlapped, and the left and right end regions (regions other than the projecting front outer plate 1a and the opposite outer regions of the separation lines 6 and 6 on the upper surface plate 5) of the overlapping inner surface are pasted. A cylindrical body composed of the face plate 5, the back plate 3 and the bottom plate 4 is formed.

  Subsequently, after the contents (contents) are loaded into the cylindrical body, the flap plates 1e and 1e on both sides of the front inner plate 1b through the fold i and the flap plates 3b on both sides of the back plate 3 through the fold g. 3b is bent at a right angle inside, and the flap plates 2b, 2b on both sides of the bottom plate 4 are bent at a right angle through the fold h, and then the flap plates 2a, 2a on both sides of the top plate 5 are turned inward. By folding the flap plates 2a and 2a on the outer surfaces of the flap plates 2b and 2b and attaching the overlap inner surfaces, the paper box with a lock hinge of the present invention as shown in FIG. Complete the box and the packaging of the contents in the box.

  Next, another example of a blank sheet (development drawing) used for assembling and boxing a paper box with a lock hinge according to the present invention will be described with reference to FIG. A top plate 5, a back plate 3, a bottom plate 4, and a front inner plate 1b constituting the front plate 1 are connected in series through parallel folds a, b, c, d.

  Flap plates 1f and 1f are connected to both sides of the front outer plate 1a through folds j, and side plates 2 and 2 are formed on both sides of the top plate 5 through folds f, respectively. Side surface outer plates 2a and 2a are connected to each other, flap plates 3b and 3b are connected to both sides of the back plate 3 via folds g, respectively, and folds h are connected to both sides of the bottom plate 4 respectively. Side surface inner plates 2b and 2b that constitute the side surface plate 2 are connected to each other.

  On the upper surface plate 5, adjacent separating lines 6, 6 adjacent to the side surface outer plates 2 a, 2 a are cut lines (or straight lines) of a shape pattern in which bent lines as shown in the figure are arranged intermittently and regularly. Are intermittently and regularly cut in a curved line shape, and the front outer plate 1a is intermittently connected to the separation lines 6 and 6, respectively. Separation lines 7 and 7 are intermittently formed as a cut line of a shape pattern in which bent lines are intermittently and regularly arranged as shown in the figure (or a cut line of a perforated shape pattern in which straight lines are intermittently and regularly arranged). The front outer plate 1a is cut into a U-shaped cut line 7a protruding from the opposite end of the separation lines 7 and 7 toward the front outer plate 1a. 5, a protruding front outer plate 1a having a U-shape or the like protruding continuously is formed.

  Note that the front outer plate 1a such as the U-shape is hooked with a finger or a nail on the front end portion 1c side of the front outer plate 1a such as a U-shape in the front outer plate 1a. 1d is formed by punching as necessary.

  Further, a semicircular arc-shaped cut line 1g protruding in the direction of the upper surface plate 5 is formed in the central portion on the front end 1c side of the protruding front outer plate 1a, and is continuous to both the left and right sides of the cut line 1g. Thus, folds k, k parallel to the fold a are formed.

  The continuous arrangement pattern of the interrupting lines constituting the opposing separation lines 6 and 6 that are cut into the upper surface plate 5 is not particularly limited in the present invention. For example, as shown in the drawing, It is good also as a continuous arrangement pattern of a discontinuous line which is a curved line-like arrangement | positioning shape, Comprising: The curved lines which protrude mutually on the outer side are opposingly arranged.

  Opposing hinge-forming cut lines 9 and 9 are provided continuously from the back plate 3 side of the top plate 5 to the back plate 3, and are provided on the outside of the top plate 5 opposite the cut lines 9 and 9. Are formed with folds 10 and 10 parallel to the direction (fold b) of the back plate 3 continuous with the opposing separating lines 6 and 6.

  Embossed portions 9a and 9a facing each other are provided on the upper surface plate 5 facing the opposite score lines 9 and 9 as needed to reinforce the rigidity of the paper. The folds 11 parallel to the folds 10 and 10 are formed on the back plate 3 on the inner side opposite to the nine and nine.

  In addition, the line shape of the opposing cut lines 9 and 9 is not particularly limited in the present invention. For example, the cut lines 9 and 9 may be curved lines that are curved in a convex shape toward the inner side as illustrated. Alternatively, straight lines facing each other in parallel may be used, or facing straight lines that expand or narrow in the direction from the top plate 5 to the back plate 3 may be used.

  The front inner plate 1b constituting the front plate 1 has a locking protrusion protruding at the cut line 1g when the front end portion 1c of the protruding front outer plate 1a having a U-shape is bent at the fold k. A cut line 8 for insertion for inserting and locking the portion 1h is provided.

  The order of assembling and boxing the paper box with the lock hinge of the present invention will be described below using the blank sheet shown in FIG. 4 described above. First, the front outer plate 1a through the folds a, b, c, d. The top plate 5, the back plate 3, the bottom plate 4, and the front inner plate 1b are each bent in a cylindrical shape in the same direction, and the front inner plate 1b is overlapped on the inner surface side of the front outer plate 1a. A cylindrical shape composed of a front plate 1, a top plate 5, a back plate 3, and a bottom plate 4 is bonded to a region (a region other than the protruding front outer plate 1 a and the outer region facing the separation lines 6 and 6 on the top plate 5). Form the body.

  Subsequently, after the contents (contents) are loaded into the cylindrical body, the flap plates 1f and 1f on both sides of the front outer plate 1a through the fold j and the flap plates 3b on both sides of the back plate 3 through the fold g. 3b is bent at a right angle inside, and the flap plates 2b, 2b on both sides of the bottom plate 4 are bent at a right angle through the fold h, and then the flap plates 2a, 2a on both sides of the top plate 5 are turned inward. By folding the flap plates 2a and 2a on the outer surfaces of the flap plates 2b and 2b and attaching the overlap inner surfaces, the paper box with a lock hinge of the present invention as shown in FIG. Complete the box and the packaging of the contents in the box.

(A) is the whole perspective view explaining an example of the paper box with a lock hinge of this invention, (b) is the whole perspective view explaining the state which opened the paper box with the lock hinge of the example. (A) is the whole perspective view explaining the other example of the paper box with a lock hinge of this invention, (b) is the whole perspective view explaining the state which opened the paper box with the lock hinge of the example. An example of the blank sheet | seat of the paper box with a lock hinge of this invention. The other example of the blank sheet | seat of the paper box with a lock hinge of this invention. (A) is the whole perspective view of the conventional paper box, (b) is the whole perspective view explaining the state which opened the conventional paper box.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Front plate 2 ... Side plate 3 ... Back plate 3a ... Back hinge plate 4 ... Bottom plate 5 ... Top plate 5a ... Extension plate 6 ... Disconnect line 7 ... Disconnect line 8 ... Insertion cut line 9 ... Hinge formation Cut line 10 ... fold 11 ... fold

Claims (2)

  In a hexahedron-shaped paper box composed of a double front plate 1, two side plates 2, 2, a back plate 3, a bottom plate 4, and a top plate 5, opposing cuts provided on the top plate 5 close to the side plates 2, 2. The separation lines 6 and 6, the opposing separation lines 7 and 7 provided continuously to the separation lines 6 and 6 on the front outer plate 1 a of the double front plate 1, and the top plate on the back plate 3 side of the top plate 5 5 and the backside plate 3 that are provided continuously across the hinge forming cut lines 9 and 9, and the cutout lines 9 and 9 on the upper surface plate 5 opposite to the cut lines 9 and 9. And folds 10 and 10 provided in parallel to the back plate 3 and folds 11 connecting the ends of the cut lines 9 and 9 provided in parallel to the folds 10 and 10 in the back plate 3. A lock hinge machine comprising a ridge line portion 12 having a lid for opening and formed by a double-sided plate of an upper surface plate 5 and a back plate 3 on the opposite inner side of the opposite cut lines 9, 9. Lock hinged carton, characterized in that it has to have.   In a hexahedron-shaped paper box composed of a double front plate 1, two side plates 2, 2, a back plate 3, a bottom plate 4, and a top plate 5, opposing cuts provided on the top plate 5 close to the side plates 2, 2. The separation lines 6, 6, the separation lines 7, 7 provided continuously to the separation lines 6, 6 along the boundary line between the front outer plate 1 a of the double front plate 1 and the upper surface plate 5, and the separation lines 7 and 7, a cut line 7 a projecting from the opposing end portion to the front outer plate side, and an opposing hinge formation continuously provided on the back plate 3 side of the top plate 5 across the top plate 5 and the back plate 3. Cut lines 9, 9, fold lines 10, 10 provided on the outer side of the top plate 5 opposite to the cut lines 9, 9, continuous to the separation lines 6, 6 and parallel to the back plate 3, and the back plate 3 is provided with a lid for opening composed of a fold line 11 connecting the ends of the cut lines 9, 9 provided in parallel to the fold lines 10, 10, and a pair of the opposed cut lines 9, 9 Lock hinged carton, characterized in that the the have a locking hinge function by ridge 12 which is formed by means of a double-sided plate the inside of the upper plate 5 and the back plate 3.

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