JP2016037297A - Packing box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packing box which hardly causes breakage to side walls, can be moved and carried stably, and prevents handhold holes formed on the box from giving discomfort to fingers of a user.SOLUTION: Handhold hole formation parts 6 for forming handhold holes by push-in force from the outside are provided on a pair of side walls. The handhold hole formation part 6 includes: a first scheduled folding line 7 extending laterally; a pair of left and right second scheduled folding lines 8 inclined so as to gradually expand downward from the vicinities of both ends of the first scheduled folding line 7; a first cut line 9 extending so as to connect the lower ends of the pair of second scheduled folding lines 8; and a pair of left and right second cut lines 10 extending downward from the vicinities of both ends of the first scheduled folding line 7 toward the first cut line 9. An interval T between the first scheduled folding line 7 and the first cut line 9 is made longer than a distance L from the first scheduled folding line 9 to ceiling plate parts 3, 5.SELECTED DRAWING: Figure 3

Description

  The present invention has at least a pair of opposite side walls and a ceiling plate portion extending laterally from an upper end of the side walls, and a handle hole for forming a handle hole on the pair of side walls based on a pressing force from the outside. The present invention relates to a packaging box provided with a forming unit.

  There exists patent document 1 shown below as prior art document information relevant to this kind of packaging box. In the packaging box described in Patent Document 1, as shown in FIG. 15 (a), the side wall 22 has a horizontal linear shape as a handle hole forming portion 16 for a user to form a handle hole for carrying a box. The bending line 17 is set, and a cutting line 18 extending downward from both ends of the bending line 17 with a curved portion is formed.

  The planned bending line 17 and the cut line 18 are in the shape of an oval extending sideways in cooperation with each other. When a user applies a pushing force to the oval part, the oval part is cut into the cut line 18. 15 is separated from the main body of the side wall 22 at the same time, and at the same time, the same part is bent into a flap shape along the planned folding line 17 and enters the inside of the packaging box, so that an oval handle hole H is formed as shown in FIG. Is formed.

  Furthermore, when the flap portion is folded upward inside the packaging box and overlapped with the back surface of the side wall 22, the swinging tip of the flap portion is configured to be in abutment with the lower surface of the ceiling plate portion 22T.

  Therefore, when the user puts his hand into the handle hole H and carries the packaging box, the folded flap portion receives the load through the ceiling plate portion 22T, so that the upper part from the upper end of the handle hole H is strengthened. It is said that.

Japanese Utility Model Publication No. 63-177218 (page 3, lines 7 to 20, FIG. 2)

  However, in the packaging box having the configuration described in Patent Document 1, for example, when a plurality of packaging boxes containing contents are displayed on top of each other at a storefront or the like, the handling hole H is handled. There is a case where the arrangement of the packaging box is changed by pulling the packaging box in the lateral direction, but in such a case, the handle hole H may be broken. Further, when the weight of the contents is relatively large, or when the contents are lifted more rapidly than expected, as illustrated in FIG. In some cases, the upper portion of the handle hole H is deformed so that the upper portion of the handle hole H falls to the inside or outside of the side wall, and the packaging box may not be stably carried.

  Further, in the packaging box described in Patent Document 1, when a user inserts a finger into the handle hole H and transports the packaging box, the end surface of a plate-like material (corrugated cardboard or the like) constituting the packaging box hits the finger. Therefore, there is a disadvantage that it is easy for the user to feel uncomfortable. In particular, in packaging boxes that store relatively heavy contents such as beverage bottles, the corrugated cardboard is generally used so that its corrugations extend in the vertical direction.

  Therefore, in view of the problems given by the above-described prior art packaging box, the object of the present invention is to provide a packaging that can be more stably moved and transported under various circumstances, such as a side wall is not easily torn. To provide a box.

  Another object of the present invention is to provide a packaging box that does not give an uncomfortable feeling to the user's fingers and the like when the user inserts his / her fingers into the handle holes and carries the packaging box.

The characteristic configuration of the packaging box according to the present invention has at least a pair of side walls facing each other, and a ceiling plate portion extending laterally from the upper end of the side walls,
The pair of side walls is provided with a handle hole forming portion that forms a handle hole based on the pushing force from the outside,
A first bent planned line extending sideways and a pair of left and right second bent planned lines inclined so as to gradually spread downward from the vicinity of both ends of the first bent planned line; A first cut line extending so as to connect lower ends of the pair of second bending lines, and a pair of left and right lines extending downward from both ends of the first bending line toward the first cutting line. And a second score line of
At least in the center of the left and right of the handle hole forming portion, the distance between the first fold line and the first cut line is greater than the distance from the first fold line to the ceiling plate part. is there.

  In the packaging box having the above-described characteristic configuration, the user pushes the outer side of the portion sandwiched between the first fold line and the first cut line constituting the handle hole forming portion with fingers or the like from the outside. Is added, the trapezoidal portion surrounded by the first fold line, the first cut line, and the pair of left and right second cut lines is bent with respect to the main body of the side wall at the first fold line, and the first flap As inside the packaging box. At the same time, the pair of left and right triangles surrounded by the second fold line, the second cut line, and the vicinity of the left and right ends of the first cut line are also connected to the main body of the side wall by the second fold line. It bends and enters the inside of the packaging box as the second flap. As a result, a trapezoidal handle hole surrounded by the first fold line, the second fold line, and the first cut line is formed, and the user's finger (specifically, generally the thumb is 4 fingers or 3 fingers excluding the thumb and little finger) are inserted into the trapezoidal handle hole. Further, in the packaging box having the above-described characteristic configuration, the distance between the first fold line and the first cut line is at least from the first fold line to the ceiling plate at the left and right centers of the handle hole forming portion. Since the free end of the first flap entering the inside of the packaging box (the bottom of the trapezoidal part separated from the main body of the side wall) comes into contact with the lower surface of the ceiling plate part, the first flap and A support structure having a triangular cross section is formed by cooperation between the side wall above the handle hole forming portion and a part of the ceiling plate portion.

Therefore, when a plurality of packaging boxes containing contents are displayed one above the other, the packaging box can be repositioned by pulling the packaging box sideways by the force of the hand inserted into the handle hole. Even in such a case, the pulling force transmitted from the user's hand is distributed to the side wall and the ceiling plate part by the triangular support structure described above, so that the handle hole is difficult to break and the packaging box is stably arranged. It became possible to change.
In addition, when the user lifts the packaging box containing the contents with both hands, the vicinity of the tip of the user's fingers supports the ceiling plate portion from below through the first flap, and at the same time, the user's fingers The left and right ends near the base end can support the packaging box via a pair of trapezoidal left and right sides of the trapezoid. As a result, the force for supporting the packaging box is distributed in three places: the ceiling plate part supported by the bottom of the trapezoidal part constituting the first flap and the pair of left and right oblique sides of the trapezoid constituting the handle hole. Therefore, even when the weight of the contents is relatively large or when it is lifted more rapidly than expected, it is difficult for phenomena such as the vicinity of the upper end of the handle hole to be broken, and the packaging box can be carried stably. Became.

  Further, in the trapezoidal handle hole formed by pushing the above fingers or the like, a trapezoidal first flap that enters the inside of the box is connected to the upper side of the trapezoid, and a pair of left and right oblique sides of the trapezoid Since the state that the triangular second flap that has entered the inside of the box is connected is obtained in the part, when the user transports the packaging box, a plate-like material (corrugated cardboard or the like constituting the packaging box) ) Is not likely to hit the user's finger directly, and as a result, a relatively heavy content such as a beverage bottle is stored in the packaging box, and corrugated paper whose corrugation extends vertically is used. Even if you are, there is no sense of incongruity such as pain of fingers.

  In another characteristic configuration of the present invention, the pair of left and right second cut lines are inclined so as to gradually spread to the left and right at an angle closer to the vertical than the pair of second folding lines. In the point.

  As in this configuration, if the configuration is such that the pair of left and right second cut lines are inclined so as to gradually spread to the left and right at an angle closer to the vertical than the pair of second bending lines, Contrary to this, the first flap is compared with the configuration in which the pair of left and right second cut lines are inclined so as to gradually approach each other downward, and the configuration in which the pair of left and right second cut lines extend vertically. Since the width of the free end (the base of the trapezoidal part separated from the main body of the side wall) is increased, the stress applied from the vicinity of the tip of the user's finger is distributed over a wider area of the ceiling plate part. As a result, a phenomenon in which the vicinity of the upper end of the handle hole or the like is broken is less likely to occur, and the strength of the handle hole is further improved.

  Another characteristic configuration of the present invention is that the first cut line is formed by a single cut line that connects the lower ends of the pair of second bending planned lines in a straight line.

  For example, as compared with other configurations in which the first cut line includes two cut lines extending obliquely upward from the lower ends of the pair of second bending planned lines, and four flaps are formed in total, With this configuration, since the size of the first flap (the trapezoidal part separated from the main body of the side wall) itself becomes large, the tip of the user's finger can easily come into contact with the first flap. Since the width of the free end is also increased, the stress applied from the vicinity of the tip of the finger is easily distributed to a wider area of the ceiling plate portion, and the strength of the handle hole is further improved.

  Another characteristic configuration of the present invention is that the length of the first bending line is in the range of 10 to 40 mm.

  For example, in a configuration in which the length of the first folding line exceeds 50 mm, the pair of trapezoidal left and right sides of the trapezoid forming the handle hole tends to be less likely to bear the force for supporting the packaging box. In this configuration, the force for supporting the packaging box is the ceiling plate part supported by the bottom side of the trapezoidal part constituting the first flap and the pair of left and right oblique sides of the trapezoidal part constituting the handle hole. The points are more evenly distributed, and the vicinity of the upper end of the handle hole is more difficult to break.

It is a perspective view showing the whole packaging box concerning the present invention. It is an expanded view of the packaging box which concerns on this invention. It is a side view which shows a handle hole formation part. It is a perspective view which shows a handle hole formation part. It is a perspective view which shows the effect | action of a handle hole formation part. It is a perspective view which shows the effect | action of a handle hole formation part. It is a longitudinal cross-sectional view of the handle hole formation part shown by FIG. It is explanatory drawing which shows the method of a 1st intensity | strength test. It is explanatory drawing which shows the method of a 2nd strength test. It is explanatory drawing which shows the handle hole formation part made into the test object by shape selection (the 1). It is explanatory drawing which shows the handle hole formation part made into the test object by shape selection (the 2). It is a side view which shows the handle hole formation part by another embodiment. It is a perspective view which shows the handle hole formation part by another embodiment. It is a perspective view which shows the effect | action of the handle hole formation part by another embodiment. It is a side view which shows the handle hole formation part by a prior art example.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated, referring drawings.
The packaging box 1 according to the present invention is made of a flexible material such as corrugated paper, and as illustrated in FIG. 1, a large number of plastic bottles 40 filled with a liquid beverage or the like are packed therein. Used for transportation and storage.

(Schematic configuration of the packaging box 1)
As can be understood from FIG. 2 showing the development view of the packaging box 1, the packaging box 1 includes four side walls 2, 3, 4 and 5 arranged adjacent to each other, and bottom plate portions 2B and 3B from the lower ends of the side walls. , 4B, 5B are extended, ceiling plate portions 2T, 3T, 4T, 5T are extended from the upper end of each side wall, and a glue margin portion 2S is extended to the side of the leftmost side wall 2. Corrugated cardboard is used such that the corrugations extend vertically.

  When assembling the packaging box 1, the side fold line SL and the lower fold line BL in FIG. 2 are bent, the bottom plate portions 2B, 3B, 4B, and 5B are bonded or joined together, and the adhesive margin portion 2S is located on the rightmost side. The packaging box 1 with the upper part opened is obtained by bonding or bonding to the side wall 5.

Next, after a predetermined amount of contents such as a plastic bottle 40 is stored in the packaging box 1, the upper fold line TL is bent and the ceiling plate portions 2T, 3T, 4T, and 5T are bonded or joined together. The packaging box 1 with the contents shown in FIG.
Near each upper end of the side walls 3, 5, a handle hole forming portion 6 is provided for the user to form a handle hole for transportation based on the pushing force from the outside when necessary.

(Configuration of the handle hole forming portion 6)
As shown in FIG. 3 and FIG. 4, the handle hole forming portion 6 is formed so that the first folding planned line 7 extending sideways and the first folding planned line 7 gradually spread downward from the vicinity of both right and left ends. From the vicinity of both ends of the pair of inclined left and right second bending lines 8, the first cut line 9 extending so as to connect the lower ends of the pair of second bending lines 8, and the first bending line 7. And a pair of left and right second cut lines 10 extending downward toward the first cut line 9.

  Strictly speaking, the first cut line 9 is divided into two parts on the left and right by a short joint part 12 (width U is about 2 to 3 mm), and the connection part with the lower end of the second fold line 8. In FIG. 1, the small arc shape 11 having a part of a circle having a radius of about 3 mm is provided. However, in general, one incision line that connects the lower ends of the pair of second bending planned lines 8 linearly. Can be considered.

The handle hole forming portion 6 as a whole forms a first trapezoid (large trapezoid) surrounded by a first folding line 7, a pair of left and right second bending lines 8, and a first cut line 9. ing.
In the present embodiment, the length Q of the bottom of the first trapezoid (the first cut line 9) is about 90 mm. Here, the length P of the upper side of the first trapezoid (first fold line 7) is about 30 mm here, but is preferably in the range of 10 mm to 40 mm.

The height T of this first trapezoid (the distance between the first fold line 7 and the first cut line 9) is set to 36 to 37 mm, and the ceiling plate portions 3T and 5T from the first fold line 7. Is sufficiently longer than the distance L (32 mm) to the lower surface.
The pair of left and right second cut lines 10 are linearly inclined so as to gradually spread left and right toward the first cut line 9 at a lower angle than the pair of second bending lines 8. ing.

The distance R between the two intersections connecting the pair of left and right second cut lines 10 to the first cut line 9 is about 46 mm here, but is preferably in the range of 14 mm to 46 mm.
In the first trapezoid described above, the second trapezoid (small trapezoid) surrounded by the first folding line 7, the pair of left and right second cut lines 10, and the vicinity of the center of the first cut line 9. Is formed.

(Operation of the handle hole forming portion 6)
From the state of FIG. 3 and FIG. 4, the user tries to carry the packaging box 1, with respect to the part sandwiched between the first fold line 7 and the first cut line 9 constituting the handle hole forming part 6. When a pressing force is applied from the outside by a finger or the like, as illustrated in FIG. 5, the first bending line 7, the pair of left and right second cutting lines 8, and the vicinity of the center of the first cutting line 9 are surrounded. The second trapezoid is bent along the first fold line 7 with respect to the side walls 3 and 5, and enters the inside of the packaging box 1 as the first flap F1.

  At substantially the same time, a pair of left and right triangular portions surrounded by the second bending line 8, the pair of left and right second cut lines 10, and the vicinity of the left and right ends of the first cut line 9 by the above-described pushing force. Is also bent with respect to the main body of the side walls 3 and 5 along the second fold line 8 and enters the inside of the packaging box 1 as the second flap F2.

  When the above pushing force is continuously applied, as illustrated in FIG. 6, the first trapezoid surrounded by the first fold line 7, the second fold line 8, and the first cut line 9. The user's fingers (specifically, generally four fingers excluding the thumb, or three fingers excluding the thumb and little finger) are inserted into the handle hole H. It becomes a state.

  As described above, the distance T between the first fold line 7 and the first cut line 9 exceeds the distance L from the first fold line 7 to the lower surfaces of the ceiling plate portions 3T and 5T. Therefore, the free end X (the bottom of the small trapezoidal part separated from the main body of the side wall) of the first flap F1 entering the inside of the packaging box 1 comes into contact with the lower surfaces of the ceiling plate parts 3T and 5T. As a result, as illustrated in FIG. 7, the first flap F <b> 1, the side walls 3, 5 above the handle hole H and a part of the ceiling plate portions 3 </ b> T, 5 </ b> T cooperate with each other to have a triangular cross section. A support structure V is formed.

  Therefore, even if the user inserts his hand into such a handle hole H and pulls the packaging box sideways, the pulling force transmitted from the user's hand is applied to the side walls 3 and 5 and the ceiling by the triangular support structure V. Since it is distributed to the plate portions 3T and 5T, the handle hole H is hardly broken.

  In addition, when the user lifts the packaging box 1 with both hands using the pair of handle holes H, the vicinity of the tip of the user's fingers (generally 3 to 4 fingers excluding the thumb) holds the first flap F1. The left and right ends near the base end of the user's fingers (generally the index finger and the middle finger, etc.), at the same time, are a pair of trapezoidal left and right sides of the trapezoid that form the handle hole H. A state in which the packaging box 1 is supported through (a portion corresponding to the second planned bending line 8) is obtained.

  In this state, the force for supporting the packaging box 1 is a pair of left and right oblique sides of the trapezoidal plate portions 3T and 5T supported by the bottom side of the trapezoidal portion constituting the first flap F1 and the trapezoidal hole H. It is distributed in three points called parts.

  A first flap F1 that enters the inside of the packaging box 1 is connected to the upper side of the first trapezoid that forms the handle hole H, and a pair of left and right oblique sides of the first trapezoid is connected to the packaging. Since the triangular second flap F2 that has entered the inside of the box is connected, an end face such as a cut line of corrugated cardboard paper constituting the packaging box 1 when the user transports the packaging box 1 Discomfort caused by hitting the user's finger is eliminated.

  Hereinafter, as a process for completing the present invention, the contents and test results of a simple strength test carried out for examining an appropriate shape and dimension of the handle hole forming portion 6 will be described.

(Selecting the shape of the handle hole forming part-1)
As a first stage of shape selection, first, an appropriate value of the length P of the upper side of the first trapezoid (corresponding to the first planned bending line 7) constituting the handle hole forming portion 6 was determined. As a determination method, the following first strength test and second strength test were performed.

  As shown in FIG. 8, the first strength test is performed by using a packaging box (test sample) containing 12 PET bottles 40 filled with 1.5 liters of liquid beverage. With the fingers inserted into H and suspended in the air and stationary, the duration until the hand hole H is broken by its own weight is measured and recorded.

  As shown in FIG. 9, the second strength test is performed by placing a packaging box (sample) containing 12 PET bottles 40 filled with 1.5 liter of liquid beverage on the floor surface. Six or more PET bottles 40 filled with a new 1.5 liter liquid beverage are placed as additional weights in the load packaging box WB placed on the upper surface of the packaging box, and the tester installs the packaging box (sample to be tested). ) Insert a finger into one of the handle holes H and move it 30 cm horizontally on the floor at a constant speed, repeating the process while increasing the additional weight, and the handle hole H breaks when there are more additional weights. It is determined and recorded.

  As shown in FIG. 10 and Table 1, the tested packaging boxes are all A (P = 10 mm), B (P = 20 mm), C (P = 30 mm), D (P = 40 mm) belonging to the present invention. And four types of Comparative Example S similar to the handle hole forming portion 16 described in Patent Document 1 described above.

  As shown in Table 1, the test results of the first strength test of the packaging box according to the present invention are 20 seconds, 29 seconds, 38 seconds, and 18 seconds, respectively. Also, the duration according to Comparative Example S exceeded 16 seconds, and among them, C (P = 30 mm) showed the highest strength.

  The above test results indicate that, among the handle hole forming portions 6 based on the definition of the present invention, if the length P of the upper side of the trapezoid that constitutes the handle hole H is too large, the pair of left and right oblique sides of the trapezoid that constitutes the handle hole H Since it is difficult for the portion to receive stress based on the weight of the packaging box 1 and the contents, the ceiling plate portion in which the stress based on the weight of the packaging box 1 is supported by the bottom of the trapezoidal portion constituting the first flap F1 and the handle It becomes difficult to disperse to the three trapezoidal left and right oblique sides constituting the hole H, and conversely, if the length P of the upper side is too small, the area of the first flap F1 contacting the ceiling plate is insufficient. Thus, it is presumed that it is difficult to obtain the effect that the stress applied from the vicinity of the tip of the finger is distributed over a wide range of the ceiling plate portion via the first flap F1.

As shown in Table 2, the test results of the second strength test of the packaging box according to the present invention generally indicate higher strength as the upper side length P is smaller. In the packaging box according to the present invention, A (P = 10 mm) and B (P = 20 mm) having the smallest value of P indicate the highest strength (12), and C (P = 30 mm) The next highest strength (10) was shown.
The above results show that the stress applied to the side walls 3 and 5 from the fingers inserted into the handle holes H is smaller in the handle hole forming portion 6 based on the definition of the present invention as the upper side length P is smaller. It is presumed that this indicates that it tends to be dispersed over a wide range along the direction.

  As shown in Table 2, in the second strength test, the packaging box (A) having an upper side length P of 10 mm and the packaging box (B) having a length of 20 mm showed the highest strength. At the stage, emphasizing the results of the first strength test and the little uncomfortable feeling that the fingers receive from the handle hole H, proceeding with more detailed selection operations centering on the packaging box (C) with an upper side length P of 30 mm. It was.

(Selecting the shape of the handle hole forming part-2)
As a second stage of shape selection, the length P of the upper side is fixed to 30 mm, and a free end length R of the first flap (in other words, an appropriate inclination angle of the second cut line) is selected. As a typical determination method, the first strength test was performed in the same manner as described above.
As shown in FIG. 11 and Table 3, the tested samples are all of three types C1 (R = 14 mm), C2 (R = 30 mm), and C3 (R = 46 mm) belonging to the present invention. C3 has the same shape as C used in the first stage of shape selection.

As shown in Table 3, the results of the first strength test in the second stage of the packaging box according to the present invention are 21 seconds, 24 seconds, and 37 seconds for C1, C2, and C3, respectively. R = 46 mm) shows the highest strength.
The above results show that the length of the free end of the first flap F1 that contacts the ceiling plate portion increases as the length R of the base of the trapezoid forming the handle hole H increases in the handle hole forming portion 6 defined by the present invention. It is surmised that the stress applied from the vicinity of the tip of the finger is sufficiently distributed over the wide area of the ceiling plate portion via the first flap F1.

[Another embodiment]
As illustrated in FIG. 12 and FIG. 13, the first cut line 9 includes two inclined cut lines 9 a extending obliquely inward from the lower ends of the pair of second bending planned lines 8 and two inclined cut lines. This is implemented by a configuration in which the upper ends of 9 a are connected to each other by straight cut lines 9 b and the lower ends of the pair of second bending lines 8 are connected by a straight third bending line 13. It is also possible.

  Even in this embodiment, the principle that the distance T between the first fold line 7 and the straight cut line 9b exceeds the distance L from the first fold line 7 to the lower surfaces of the ceiling plate portions 3T and 5T is observed. Therefore, as in the state shown in FIG. 7, the free end X of the first flap F1 entering the inside of the packaging box 1 contacts the lower surface of the ceiling plate portions 3T and 5T, and the first flap F1 and the handle hole Three of the side walls 3 and 5 above H and a part of the ceiling plate portions 3T and 5T form a support structure V having a triangular cross section.

  In this embodiment, when the user applies a pushing force from the outside to the handle hole forming portion 6 with a finger or the like, as shown in FIG. 14, the first fold line 7 and the linear cut line 9b A trapezoidal portion surrounded by a pair of left and right second cut lines 10 bends as a first flap F1 at the first fold line 7, and simultaneously, the second fold line 8 and the second cut line 10 are two. The pair of left and right triangular portions surrounded by the inclined cutting line 9a is also bent as the second flap F2 at the second planned folding line 8, and further, two inclined cutting lines 9a and a linear cutting line 9b, The trapezoidal portion surrounded by the third planned bending line 13 is also bent as the third flap F3 by the third bending planned line 13.

  In addition, you may implement the packaging box which concerns on this invention in the form which makes the 1st bending plan line 7 a double ruled line. In this configuration, by providing play at a distance from the first fold line 7 to the ceiling plate portion, even if an error occurs in the folding position of the paper, the free end X of the first flap F1 is connected to the ceiling plate portion. It is possible to reliably contact the lower surface.

  The present invention has at least a pair of opposite side walls and a ceiling plate portion extending laterally from an upper end of the side walls, and a handle hole for forming a handle hole on the pair of side walls based on a pressing force from the outside. It is an invention that can be used as a technique for solving the problems conventionally seen in a packaging box provided with a forming portion.

DESCRIPTION OF SYMBOLS 1 Packaging box 2 Side wall 3 Side wall 4 Side wall 5 Side wall 2T Ceiling board part 3T Ceiling board part 4T Ceiling board part 5T Ceiling board part 6 Hand hole formation part 7 1st fold expected line 8 2nd fold expected line 9 1st cut Line 10 Second cut line H Handle hole L Distance T from the first planned bending line to the ceiling plate portion T Distance between first bent planned line and first cut line

Claims (4)

Having at least a pair of opposite side walls and a ceiling plate portion extending laterally from an upper end of the side walls,
The pair of side walls is provided with a handle hole forming portion that forms a handle hole based on the pushing force from the outside,
A first bent planned line extending sideways and a pair of left and right second bent planned lines inclined so as to gradually spread downward from the vicinity of both ends of the first bent planned line; A first cut line extending so as to connect lower ends of the pair of second bending lines, and a pair of left and right lines extending downward from both ends of the first bending line toward the first cutting line. And a second score line of
A packaging box in which an interval between the first fold line and the first cut line is greater than a distance from the first fold line to the ceiling plate at least in the left and right center of the handle hole forming portion. .   The packaging box according to claim 1, wherein the pair of left and right second cut lines are inclined so as to gradually spread to the left and right at an angle closer to the vertical than the pair of second folding lines.   The packaging box according to claim 1 or 2, wherein the first cut line is constituted by a single cut line that linearly connects lower ends of the pair of second bending planned lines.   The packaging box according to any one of claims 1 to 3, wherein a length of the first fold line is 10 to 40 mm.

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