JP2013203472A - Packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging box whose sidewalls or the like are hardly torn in various situations, which can be carried more stably, and whose appearance can be easily kept satisfactory.SOLUTION: A packaging box has at least one pair of opposing sidewalls 2 and 4, and top panels extending laterally from upper ends of the sidewalls 2 and 4. Each of the pair of sidewalls 2 and 4 includes: a first cut line 8 connecting two laterally separate points via an area below two points in order to form a carrying hole H1; fold lines 7 extending so as to laterally connect the upper ends of the pair of side lines of the first cut line 8; and a pair of second cut lines 9 extending toward the top panels from the upper ends of the pair of side lines of the first cut line 8.

Description

  The present invention is a packaging made of corrugated paper or the like having at least a pair of opposite side walls and a ceiling plate portion extending laterally from the side walls, and provided with a cut line for forming a transport hole in the pair of side walls. Regarding the box.

  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. 12A, a lateral folding planned line 17 is formed on the side wall 12 as a conveyance hole forming portion 16 for a user to form the conveyance hole H. Is formed, and a cut line 18 extending downward from both ends of the planned bending line 17 is formed.

  The bend line 17 and the cut line 18 have an oval shape extending sideways in cooperation with each other, and when the user applies a pushing force to the oval part, the same part is the expected bend line 17. By bending into a flap shape and entering the inside of the packaging box, an oval transport hole H is formed. Further, as shown in FIG. 12 (b), when the flap portion is folded upward on the inside of the packaging box and overlapped with the back surface of the side wall 12, the swinging tip of the flap portion is stretched on the lower surface of the ceiling plate portion 12T. It is comprised so that it may contact.

  Therefore, when the user puts his hand into the transport hole H and transports the packaging box, the folded flap part also receives a load through the ceiling plate part 12T, so that the upper part from the upper end of the transport 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 described in Patent Document 1, when the contents are too heavy, or when a load exceeding the total mass of the cardboard box and the contents is applied to the transport hole H because the contents are lifted vigorously, As illustrated in FIG. 12C, the upper part from the upper end of the transport hole H is deformed so as to fall inside or outside the side wall, and from the left and right of the upper end of the transport hole H toward the upper edge of the packaging box. There was a risk that the packaging box could not be carried stably. In this case, since the edge of the transport hole H on the side wall tends to be broken along an unspecified disordered line, there is also a problem that the packaging box becomes poor in appearance.

  Accordingly, an object of the present invention is to provide a packaging box that can be more stably transported under various circumstances in view of the problems given by the packaging box according to the prior art exemplified above. is there.

  Another object of the present invention is to provide a packaging box whose appearance is easily maintained under various circumstances.

The characteristic configuration of the packaging box according to the present invention is:
Having at least a pair of opposite side walls and a ceiling plate portion extending laterally from the upper end of the side wall
A first cut line that connects two points laterally spaced apart from each other to form a transport hole in the pair of side walls via the lower area of the two points, and an upper end of a pair of side lines of the first cut line A fold line extending so as to connect the two sideways and a pair of second cut lines extending from the upper ends of the pair of side lines of the first cut line toward the ceiling plate portion; There is in point.

  In the packaging box according to the above characteristic configuration, when a user tries to carry the packaging box containing the contents, when a pressing force is applied to the first area 8A surrounded by the first cut line 8, first, the first area 8A Is cut off at the first cut line 8, as shown in FIG. 5B, the first region 8 </ b> A is bent into the inside of the packaging box via the fold line 7, and FIG. 5B or 5. As shown in (c), the handle portion G from which the fold line 7 protrudes downward is formed simultaneously with the first transport hole H1 having an opening area corresponding to the first region 8A.

  Further, when the handle portion G is pushed into the inside of the packaging box, the second region 9A sandwiched by the second cut line 9 is cut off by the second cut line 9, so as shown in FIG. The second region 9A is bent into the inside of the packaging box via the upper fold line TL at the boundary between the ceiling plate 2T (4T) and the side wall 2 (4), and FIG. 6 (b), FIG. 6 (c), FIG. 7 (b), FIG. 8 and the like, the lower end of the handle portion G enters the inside of the packaging box, and the handle portion G is connected to the ceiling plate portion 2T ( The packaging box can be carried in a stable form superimposed on the lower surface of 4T).

  As shown in FIGS. 5 (d) and 5 (e), when the second region 9A is separated by pushing the handle portion G inward, the second transport having a larger vertical dimension than the first transport hole H1. Hole H2 is formed.

  Further, in the packaging box having the above-described characteristic configuration, the final cross-sectional shape of the second transport hole H2 and the handle portion G obtained before the packaging box starts to be transported is the vertical length of the first cut line 8 and the second cut line. However, in any case, since the second region 9A is cut along the predetermined second cut line 9 formed in advance, the upper edge of the original transport hole Such as breakage in an unspecified shape, the strength in the vicinity of the transport hole is not deficient, and the appearance of the packaging box after the start of transport is easily maintained beautifully.

  Another characteristic configuration of the present invention is that the first cut line and the second cut line have the same vertical length.

  In the case of this configuration, when the first region 8A pushed into the inside is bent upward and superimposed on the back surface of the second region 9A, as shown in FIG. Since the user touches or is close to the lower surface of the ceiling plate portion 2T (4T), the user supports the ceiling plate portion 2T (4T) using both the first region 8A and the second region 9A. Compared with the configuration in which the vertical length of the cut line 8 is set to be significantly less than the vertical length of the second cut line 9, the contents are too heavy or because they are lifted vigorously, Even when a load exceeding the total mass is applied to the transport hole, the ceiling plate 2T (4T) is hardly damaged.

  In addition, even when the support state by one of the left and right transport holes is inadvertently lost while the packaging box is being transported and the balance of the packaging box is lost, the first region 8A overlapped with each other with this configuration. And the second region 9A can swing freely with the boundary (upper folding line TL) between the second region 9A and the ceiling plate 2T (4T) as a pivot point. Regardless of the angle orientation, the packaging box can be supported by the other transport hole in a stable form in which the handle part G enters the vertical direction or inside the packaging box.

  Another characteristic configuration of the present invention is that the vertical length of the first cut line is set to exceed the vertical length of the second cut line.

  In the case of this configuration, when the difference in the vertical length between the first cut line 8 and the second cut line 9 is less than a predetermined dimension, the first area 8A pushed in is overlapped with the back surface of the second area 9A. Even if the user releases the hand, the tip of the first region 8A is held in a state of being superimposed on the back surface of the second region 9A by friction with the lower surface of the ceiling plate 2T (4T). Convenient.

  On the other hand, when the difference between the vertical lengths of the first cut line 8 and the second cut line 9 is equal to or larger than a predetermined dimension, the first area 8A pushed into the inside is brought closer to the back surface of the second area 9A. The first region 8A is in contact with the lower surface of the ceiling plate portion 2T (4T), so that the first cut line 8 and the second cut line 9 have two sides extending vertically, and the ceiling plate portion 2T ( 4T) is obtained, and the user grasps the first region 8A and the second region 9A from the left and right, and the lower surface of the ceiling plate 2T (4T) is the first. The packaging box can be carried in a highly stable form supported by the tip of the region 8A.

  In another feature of the present invention, the first cutting line is bent by a bending line by a pressing force from the outside to form a first region that is pushed into the inside of the packaging box, and the tip of the first region There is a locking recess that locks the ceiling plate portion.

  If it is this structure, when it is going to bring the 1st area | region 8A pushed in inside close to the back surface of the 2nd area | region 9A, the front-end | tip part of 1st area | region 8A becomes a latching recessed part of the ceiling board part 2T (4T). Since it can be locked, the first cut line 8 and the second cut line 9 described above have two sides extending vertically, and the cross-sectional shape of an inverted triangle with a part of the ceiling plate portion 2T (4T) as a base. Is easy to hold and convenient.

  Another characteristic configuration of the present invention is that the pair of second cut lines are arranged on the inner side along the side wall than the pair of side lines of the first cut line.

  In this configuration, when the first region 8A pushed into the inside is bent upward and overlapped with the back surface of the second region 9A, the left and right ends of the first region 8A are positioned on the left and right outside of the second region 9A. Overlaps with the side wall 2 (4). Therefore, even if a force for pulling out the handle portion G composed of the first region 8A and the second region 9A, which are overlapped with each other, from the carrying hole is inadvertently applied, the left and right ends of the first region 8A are left and right. ), It is difficult to be pulled out from the main body of the side wall, so that a stable form in which the lower end of the handle portion G enters the inside of the packaging box is easily secured, and the packaging box is easy to carry.

  Another feature of the present invention is that the first cut line is set to be more fragile than the second cut line with respect to the pushing force from the outside.

  If it is this structure, when applying the pushing force from the outside in order to make a conveyance hole, even if it does not necessarily aim at 1st area | region 8A enclosed by the 1st cut line 8 correctly, it will be surrounded by the 1st cut line 8 The first region 8A and the second region 9A are linear because the first region 8A is easily pushed into the packaging box ahead of the second region 9A sandwiched between the pair of second cut lines 9. Inconveniences such as being pushed into the inside of the packaging box are unlikely to occur.

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 the conveyance hole formation part of a packaging box. It is a perspective view which shows the effect | action of a conveyance hole formation part. It is a fracture | rupture front view which shows the effect | action of the conveyance hole formation part by 1st Embodiment. It is a fracture | rupture front view which shows the effect | action of the conveyance hole formation part by 2nd Embodiment. It is explanatory drawing which shows the effect | action of the conveyance hole formation part by 3rd Embodiment. It is a fracture | rupture front view which shows the effect | action of the conveyance hole formation part by the modification of 3rd Embodiment. It is a side view which shows the effect | action of the conveyance hole formation part by another embodiment. It is a side view which shows the effect | action of the conveyance hole formation part by another embodiment. It is a side view which shows the conveyance hole formation part of the packaging box by another embodiment. It is a side view which shows the conveyance hole formation part by a prior art example.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated, referring drawings.
(First embodiment)
A packaging box 1 according to a first embodiment of the present invention is shown in FIGS. The packaging box 1 shown in FIG. 1 is made of a flexible material such as corrugated cardboard, and is used to pack and transport a large number of plastic bottles 40 filled with liquid.

  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 lower end of each side wall, and an adhesive margin portion 2S is extended to the side of the leftmost side wall 2. .

  When assembling the packaging box 1 shown in FIG. 1, the side fold line SL and the lower fold line BL in FIG. 2 are bent, and the bottom plate portions 2B, 3B, 4B, and 5B are bonded or joined together, By bonding or joining 2S to the rightmost side wall 5, the packaging box 1 with the top opened is obtained.

Next, after storing a predetermined quantity of PET bottles 30 and the like inside 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, as shown in FIG. The packaging box 1 with contents is completed.
Near each upper end of the side walls 2 and 4, a transport hole forming portion 6 is provided for the user to easily form a transport hole.

  As shown in FIG. 3, the transport hole forming part 6 is a planned folding line extending laterally at a position below the upper folding line TL located at the boundary between the side walls 2, 4 and the ceiling plate parts 2 T, 4 T. 7 (an example of a fold line), a U-shaped first cut line 8 extending downward from the left and right ends of the planned fold line 7, and an upper fold upward from the left and right ends of the fold planned line 7 A pair of second cut lines 9 extending to the vicinity of the line TL and a third cut line 10 extending laterally near the center of the planned bending line 7 are provided.

  In other words, the side walls 2 and 4 have the U-shaped first cut line 8 for forming the transfer hole and the upper ends of the pair of side lines of the first cut line 8 sideways as the transfer hole forming portion 6. A bending line 7 extending so as to be connected, a pair of second cutting lines 9 extending from the upper ends of the pair of side lines of the first cutting line 8 to the vicinity of the boundary between the ceiling plate portions 2T and 4T, and a bending line A third cut line 10 extending in the lateral direction near the center of the planned line 7 is provided.

  The U-shaped first cut line 8 connects two points separated from each other in the lateral direction to form a transport hole (both ends of the planned folding line 7 correspond) via the lower region of the two points. It is an example of a first cut line, and the shape is not limited to a U-shape, but a third shape obtained by rotating a V-shape or a U-shape by 90 ° clockwise, and a lower corner of the third shape is slanted It may be a shape cut into two or a shape in which a pair of U-shaped side lines gradually expands to the left and right.

A U-shaped region surrounded by the first cut line 8 and the third cut line 10 (or the planned bending line 7) is called a first region 8A, and the second cut line 9 and the third cut line 10 (or A rectangular area surrounded by the planned folding line 7) and a part of the upper folding line TL is referred to as a second area 9A.
In addition, since the 1st cut line 8 and the 2nd cut line 9 are linearly continued up and down, both seem to comprise one U-shaped cut line 8 and 9 as a whole.

  Three short temporary connection portions 8J are left in the middle of the lower first cut line 8 as uncut portions that connect the first region 8A and the surrounding side walls 2 and 4, and the upper second cut line 9 In the middle of this, two short temporary connection portions 9J are left as uncut portions connecting the second region 9A and the left and right side walls 2 and 4.

  Further, a small arc-shaped first auxiliary cutting line 9P is continuously provided from each upper end of the pair of second cutting lines 9, and an extremely short second auxiliary cutting line 10P is vertically moved from both ends of the third cutting line 10. It is connected in the direction. The first auxiliary cut line 9A enters the ceiling plate portions 2T and 4T from the upper end of the second cut line 9 over the upper fold line TL while being curved outward, and continues to the upper fold line TL again.

(Operation of the transport hole forming part 6)
When the user tries to carry the packaging box 1 and applies a pressing force to the first region 8A from the state shown in FIGS. 4A and 5A, the three temporary connection portions 8J are first cut and the same. The first region 8A is separated by the first cut line 8, and the first region 8A is bent through the fold line 7 and enters the inside of the packaging box 1, as shown in FIG. A handle portion G having a portion 7 protruding downward is formed simultaneously with the first transport hole H1 having an opening area corresponding to the first region 8A.

  In this embodiment, since the third cut line 10 is provided at the left and right center part of the planned bending line 7, when a pressing force is applied to the first area 8A, the second area 9A is not separated, It is particularly easy to obtain an advantageous result that only one region 8A is bent at the fold line 7 with respect to the second region 9A and enters the inside of the packaging box 1. However, the third incision line 10 is not provided, and, for example, by providing a fragile line by a method such as applying a press along the planned bending line 7 from the inside of the corrugated paper, the same operation can be performed by performing a normal pushing operation. The result is obtained.

  Further, in this embodiment, since the first cut line 8 and the second cut line 9 have the same vertical length, when the first region 8A is brought closer to the back surface of the second region 9A with a fingertip, As shown in FIG. 5 (c), the first region 8A and the second region 9A are doubly overlapped, and the tip of the first region 8A is in contact with the lower surface of the ceiling plate portions 2T and 4T or the handle portion G. When the packaging box 1 is lifted through, a state of being opposed to each other through a slight gap so that contact is immediately started is obtained.

  Therefore, when the user lifts the packaging box 1 mainly through the handle portion G in the state shown in FIG. 5C, the ceiling plate portions 2T and 4T are provided through both the first region 8A and the second region 9A. Compared to the configuration in which the vertical length of the first cutting line is set to be lower than the vertical length of the second cutting line, the strength of the selected corrugated paper and the mass of the stored contents Depending on the case, when the packaging box 1 is maintained in a substantially horizontal posture by the left and right handle portions G, the ceiling plate portions 2T and 4T are hardly damaged.

  However, when the handle portion G is further pushed into the inside of the packaging box 1, the two temporary connection portions 9J are cut and the second region 9A is cut off by the second cut line 9 as shown in FIG. As illustrated in (d), the second region 9A is folded inside the packaging box 1 via an upper folding line TL located at the boundary between the ceiling plate 2T (4T) and the side wall 2 (4). 5 (d) or 5 (e), the lower end of the handle G enters the inside of the packaging box, and a second transport hole H2 having an opening area larger than the first transport hole H1 is formed. The

  In the example of FIG. 5 (d), the handle part G that has entered the inside of the packaging box 1 is supported, so even if the mass of the stored contents is large, it is relatively more stable than the state of FIG. 5 (c). Can be supported.

  Further, in the example of FIG. 5D, the handle portion G composed of the first region 8A and the second region 9A that are overlapped with each other can swing freely from side to side with the upper folding line TL as a pivot point. Even if the packaging box 1 is out of balance and tilted, the handle portion G can be supported in the vertical direction or in a stable form entering the inside of the packaging box 1 through the other transport hole. .

  In the example of FIG. 5 (e), the handle portion G composed of the first region 8A and the second region 9A overlapped with each other is largely bent at the upper fold line TL by the user's fingertip or the like, and the ceiling plate portion 2T. By being superimposed on the lower surface of (4T), the handle portion G in which the corrugated paper is substantially superimposed in three layers appears, and it is easy to carry in a stable form.

  Moreover, in the state of FIG.5 (d) and FIG.5 (e), since a user can insert a fingertip deeply from the 2nd conveyance hole H2 with a larger opening area than the 1st conveyance hole H1, more The packaging box can be carried in a stable form.

(Second Embodiment)
The second embodiment differs from the first embodiment only in the dimensional configuration of the transport hole forming portion 6.
In the transport hole forming unit 6 according to the second embodiment of the present invention, as shown in FIG. 6, the vertical length of the first region 8A defined by the first cut line 8 is defined by the second cut line 9. It is set so as to be sufficiently longer than the vertical length of the second region 9A.

  Therefore, when a force for pushing into the first region 8A is applied from the state of FIG. 6A, the first region 8A is first cut off by the first cut line 8, and as shown in FIG. 6B, the first region 8A Is bent through the fold line 7 and enters the inside of the packaging box 1, and the handle portion G in which the position of the fold line 7 protrudes downward is a first transport hole H1 having an opening area corresponding to the first region 8A. At the same time formed.

  In this embodiment, as described above, since the vertical length of the first region 8A is set to be sufficiently larger than the vertical length of the second region 9A, the first region 8A pushed into the interior is further increased. When approaching the back surface of the second region 9A, as shown in FIG. 6 (c), the tip of the first region 8A comes into contact with the lower surface of the ceiling plate 2T (4T), so that the first cut An inverted triangular cross-sectional shape is obtained in which the line 8 and the second cut line 9 are two sides extending vertically and a part of the ceiling plate 2T (4T) is the bottom.

  Therefore, the user grasps the first area 8A and the second area 9A corresponding to the two sides from the left and right sides, and supports the lower surface of the ceiling plate 2T (4T) with the tip of the first area 8A. The packaging box 1 can be carried in a high form.

(Third embodiment)
In the packaging box 1 according to the third embodiment of the present invention, as illustrated in FIG. 7 or FIG. 8, a locking recess 30 that locks the tip of the first region 8 </ b> A that is pushed into the interior by a pushing force from the outside. 32 is formed in the ceiling plate portion 2T (4T).

  In the example of FIG. 7, a rectangular convex portion 28 is formed at the left and right central portion of the tip of the first region 8 </ b> A, and the ceiling plate portion 2 </ b> T (4 </ b> T) has a shape corresponding to the sectional shape of the convex portion 28. A cut line (not shown) is formed in advance, and the convex portion 28 of the first region 8A pushed into the interior by the pushing force from the outside is pressed against a corresponding portion of the lower surface of the ceiling plate portion 2T (4T). And the site | part enclosed by the cut line is removed from the ceiling board part 2T (4T), and the convex-shaped part 28 is inserted in the through-hole 30 (an example of a latching recessed part) formed there.

  In the example of FIG. 8, a pair of locking pieces 29 are bonded in advance to the lower surface of the ceiling plate portion 2T (4T), and the tip of the first region 8A pushed into the interior by the pushing force from the outside is used as the ceiling plate portion. When pressed against the lower surface of 2T (4T), the tip of the first region 8A is engaged in a groove 32 (an example of a locking recess) positioned between the pair of locking pieces 29. The locking piece 29 is a rectangular member formed of corrugated paper or the like. In the configuration of FIG. 8, it is not necessary to form a convex portion or the like at the tip of the first region 8A.

  7 and 8, in the middle of the operation of bringing the first region 8A pushed into the back surface of the second region 9A closer to the back surface of the second region 9A, the front end of the first region 8A is engaged with the locking recess 30, 32, the first cut line 8 and the second cut line 9 described above are two sides extending vertically, and an inverted triangular shape having a base part of the ceiling plate portion 2T (4T). The cross-sectional shape is easy to hold and is convenient.

[Another embodiment]
<1> Unlike the example of FIG. 6, the vertical length of the first cut line 8 may be slightly greater than the vertical length of the second cut line 9. In this case, the difference in the vertical length between the first cut line 8 and the second cut line 9 is that the first area 8A when the first area 8A pushed inside is further brought closer to the back surface of the second area 9A. It is necessary to make the tip of the top of the ceiling plate portion 2T (4T) slide on the lower surface of the ceiling plate portion 2T (4T) with some frictional resistance so as to overlap the second region 9A.

  As described above, when the difference in the vertical length between the first cut line 8 and the second cut line 9 is small, the tip of the first region 8A is rubbed with the lower surface of the ceiling plate 2T (4T) so that the user can Even if the hand is released, the first region 8A is advantageously held in a state of being superimposed on the back surface of the second region 9A.

<2> As illustrated in FIGS. 9 and 10, the pair of second cut lines 9 may be arranged on the inner side along the side wall 2 (4) than the pair of side lines of the first cut line 8. .
In the example of FIG. 9, as shown in FIG. 9A, the pair of second cut lines 9 is about 45 ° from the upper ends of the pair of side lines of the first cut line 8 (intersection with the folding line 7). It extends slightly inwardly at an angle, and extends from there to the vicinity of the boundary with the lower surface of the ceiling plate 2T (4T), that is, in parallel with the first cut line 8.
In the example of FIG. 10, as shown in FIG. 10A, the pair of second cut lines 9 is connected to the ceiling plate portion 2 </ b> T from the upper ends of the pair of side lines of the first cut line 8 (intersection with the folding line 7). It extends linearly inwardly with respect to the first cut line 8 up to the vicinity of the boundary with the lower surface of (4T).

  In either case of FIG. 9 or FIG. 10, when the first region 8A pushed in is folded upward and superimposed on the back surface of the second region 9A, as shown in FIG. 9B or FIG. 10B. In addition, the left and right ends of the first region 8A overlap with the portion of the side wall 2 (4) located on the left and right outside of the second region 9A.

  Accordingly, by further pushing the first region 8A and the second region 9A into the inside of the packaging box 1, the second region 9A is separated by the second cut line 9, and then the first region 8A and the first region 8A overlapped with each other. Even if a force for pulling the handle portion G composed of the two regions 9A outward from the transport hole H2 is inadvertently applied, the left and right ends of the first region 8A are hooked on the back surface of the side wall 2 (4), so that the side wall 2 ( 4) Since the lower end of the handle part G enters the inside of the packaging box 1, a stable form is easily secured, and the packaging box 1 is easily carried.

<3> It is possible to implement the first cutting line 8A so as to be weaker than the second cutting line 9A with respect to the pressing force from the outside. As an implementation method of such a form, for example, a method of keeping the temporary connection portion 8J left in the middle of the first cut line 8 shorter than the temporary connection portion 9J left in the middle of the second cut line 9 Alternatively, the number of temporary connection portions 9J left in the middle of the second cut line 9 can be increased more than the number of temporary connection portions 8J left in the middle of the first cut line 8.

  In these forms, when the pushing force from the outside is applied to the transport hole forming portion 6, even if the first area 8 </ b> A surrounded by the first incision line 8 is not accurately aimed, the first incision line 8 </ b> A is the second incision. Since it is easier to cut than the cut line 9A, the first region 8A is more likely to be pushed into the interior prior to the second region 9A.

<4> The shape of the first score line 8 and the first region 8A is not limited to the U shape, and may be a square shape or the like.

<5> You may implement the conveyance hole formation part 6 with the form illustrated in FIG. Here, the third horizontal cutting line 10 is arranged in the vicinity of the boundary between the first area 8A and the second area 9A. However, the second auxiliary cutting line 10P connected from both ends of the third cutting line 10 is provided. Is not in the vertical direction as in the example of FIG. 3, but extends obliquely upward and obliquely downward from both ends of the third cut line 10 toward the outside.

  Here, the planned bending line 7 disposed outside the third cut line 10 extends generally horizontally from the pair of left and right outer end portions of the second auxiliary cut line 10P. As a result, the planned fold lines 7 are two fold planned lines 7a and 7b (an example of fold lines) that are spaced apart by several millimeters in the vertical direction and are parallel to each other. The lower first cut line 8 is not provided with an uncut portion, and the uncut portion is only a pair of left and right temporary connection portions 9J disposed at the lower end of the upper second cut line 9. .

  When the user applies a pushing force to the first area 8A, the first area 8A is separated by the first cut line 8, and is folded inside the box so as to swing around the vicinity of the third cut line 10. Thus, a handle having a lower end near the planned bending line 7 is formed. At this time, since the planned folding line 7 is two parallel folding lines 7a and 7b, the lower end of the obtained handle is substantially equal to the interval between the two folding lines 7a and 7b. Two generally flat rectangular receiving surfaces with a width are formed. Therefore, as compared with the configuration in which only one bending line 7 is formed, the lower end of the handle is less likely to bite into the user's hand even if the contents of the box are heavy.

<6> The material of the packaging box 1 is not limited to corrugated paper, and cardboard, plastic corrugated cardboard, or the like may be used.

  The present invention has hitherto been seen in a packaging box having at least a pair of opposite side walls and a ceiling plate portion extending laterally from the side walls, and provided with a cut line for forming a transport hole in the pair of side walls. It can be used as a technique for solving the problem.

1 Packaging Boxes 2, 3 Side Walls 2T, 4T Ceiling Board 6 Transport Hole Forming Section 7 Planned Bending Line (Bending Line)
8 First cut line 8A First region 8J Temporary connection portion 9 Second cut line 9A Second region 9P First auxiliary cut line 10 Third cut line 10P Second auxiliary cut line 30 Through hole (locking recess)
32 Groove (locking recess)
BL Lower fold line H1 1st transport hole (transport hole)
H2 Second transport hole (transport hole)

Claims (6)

Having at least a pair of opposite side walls and a ceiling plate portion extending laterally from an upper end of the side walls,
A first cut line that connects two points laterally spaced apart from each other to form a transport hole in the pair of side walls via the lower area of the two points, and an upper end of a pair of side lines of the first cut line A fold line extending so as to connect the two sideways and a pair of second cut lines extending from the upper ends of the pair of side lines of the first cut line toward the ceiling plate portion; Packaging box.   The packaging box according to claim 1, wherein the first cut line and the second cut line have the same vertical length.   The packaging box according to claim 1, wherein the vertical length of the first cut line is set to exceed the vertical length of the second cut line.   The first cut line is bent by a bending line by a pressing force from the outside to form a first region that is pushed into the packaging box, and a locking recess that locks the tip of the first region is The packaging box as described in any one of Claim 1 to 3 currently formed in the ceiling board part.   The packaging box according to any one of claims 1 to 4, wherein the first cutting line is set to be more fragile than the second cutting line with respect to a pressing force from the outside.   The packaging box according to any one of claims 1 to 5, wherein the pair of second cut lines are arranged on the inner side along the side wall than the pair of side lines of the first cut line.

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