Linked packaging boxes

Abstract

To provide a connection type packaging box which has an excellent transportability and space-saving storage space, and in which a reduction in strength is prevented even when a large load or shock is applied during transportation of a product.SOLUTION: This invention relates to a connection type packaging box 1 configured by connecting small-size packaging boxes 30, 30 by a top plate 10 that closes both openings of both of the small-size packaging boxes. The top plate 10 has: a front flap 12 that is glued to the front top of both of the small-size packaging boxes; a rear flap 13 that is glued to the rear top of both of the small-size packaging boxes; a left flap 14 that is glued to the left top of the left side small-size packaging box; and a right flap 15 that is glued to the right top of the right side small-size packaging box. The top plate 10 is formed with a band-shaped opening portion 16 extending along the abutting portion between the left and right sides of both of the small-size packaging boxes, and open-break guiding lines L20 and L20 connected to the band-shaped opening portion 16. The open-break guiding lines L20,L20 are formed so that they do not cross the boundary of the band-shaped opening portion 16 and enter the inner side of the above-mentioned opening portion.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a linkable packaging box in which two small packaging boxes are linked together. [Background technology]

[0002] Large PET bottles of drinking water for water dispensers are generally sold in sets of two. When transporting two large PET bottles, for example, two small packaging boxes containing one large PET bottle are placed side by side and connected with a PP band, or the two bottles are placed together in a large box. In packaging where small packaging boxes are connected with PP bands, the bands are used for handling during transportation, etc., which can easily loosen or dig into the boxes, causing problems with the boxes being damaged. Also, in packaging where two items are placed together in a large box, the large box becomes long and narrow, so it is necessary to secure a large storage space.

[0003] One solution to the problems caused by this type of packaging is the interlocking packaging box disclosed in Patent Document 1. The interlocking packaging box in Patent Document 1 is made up of small packaging boxes lined up with their sides touching and connected together by a top plate. The top plate is provided with a strip-shaped tear-off tape that can be separated into individual small packaging boxes. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 54-97340 Summary of the Invention [Problem to be solved by the invention]

[0005] The above-mentioned conventional interlocking packaging box can be separated into small packaging box units using a tear-off tape, but because the top surface of each packaging box is covered with a top plate, opening it is cumbersome. If a break guide line for opening were formed on the top plate, it would be easier to open the top plate, but there was a possibility that the load or impact acting on the packaging box during product transportation would unintentionally cause a break to progress from the notch in the tear tape to the break guide line, which could reduce the strength of the packaging box.

[0006] The present invention aims to solve the above-mentioned problems and to provide a linkable packaging box that is excellent in transportability and space-saving storage, and whose strength is not easily weakened even when a large load or impact is applied during product transportation, etc. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the present invention provides a linkable packaging box formed by abutting the left and right side surfaces of two small packaging boxes with open tops and connecting the two small packaging boxes with a top plate that closes the openings. The box includes a front flap that is provided on the front edge of the top plate and adhered to the upper front surfaces of the two small packaging boxes, a back flap that is provided on the rear edge of the top plate and adhered to the upper rear surfaces of the two small packaging boxes, a left flap that is provided on the left edge of the top plate and adhered to the upper left surface of the left small packaging box, and a right flap that is provided on the right edge of the top plate and adhered to the upper right surface of the right small packaging box. The top plate is formed with a strip-shaped opening portion that extends along the abutment portion where the left and right side surfaces of the two small packaging boxes abut. The top plate also includes a tape-shaped opening portion that is connected to the strip-shaped opening portion. A pair of left and right Opened and broken for A guide wire is formed. A pair of left and right The above opening for The breakage guide line is formed so as not to extend beyond the boundary of the strip-shaped tearing portion and enter the inside of the tearing portion. An opening start portion, which serves as a starting point for opening the top plate, is formed in the approximate center of the top plate so as to intersect with the band-shaped opening portion. The pair of left and right opening break guide lines includes front and rear first break guide lines, front and rear second break guide lines, and front and rear third break guide lines. The front and rear first break guide lines extend in the left and right directions from positions near the front and rear of the opening start portion as starting points. The front and rear second break guide lines are formed continuous with the extending ends of the front and rear first break guide lines and extend obliquely toward the front and rear edges of the top plate. The front and rear third break guide lines are formed continuous with the extending ends of the front and rear second break guide lines and extend along the front and rear edges of the top plate to the left and right edges of the top plate.

[0008] In the linkable packaging box of the present invention, two small-sized packaging boxes can be integrally connected by the top plate without using conventional PP bands or large boxes. Therefore, the linkable packaging box of the present invention has excellent transportability. Furthermore, the two small-sized packaging boxes can be separated by opening the strip-shaped opening section, which saves storage space. Furthermore, the two small-sized packaging boxes can be opened by cutting open the cutting guide line for opening the top plate, making the opening process easy. Furthermore, since the opening fracture guide line is formed so as not to go beyond the boundary of the band-shaped opening portion and penetrate into the inside of the opening portion, even if a large load or impact is applied during product transportation, etc., fracture is less likely to progress from the band-shaped opening portion to the opening fracture guide line, compared to when it is formed so as to go beyond the boundary of the band-shaped opening portion and penetrate into the inside of the opening portion (the area between the left and right boundaries). Therefore, strength can be ensured.

[0009] It is also preferable that the boundary of the strip-shaped opening portion has a width that spans the abutting portion between the left and right side surfaces of both the small packaging boxes in the left-right direction.

[0010] In this configuration, by cutting open the strip-shaped opening portion, an opening that leads to the interior of each small packaging box can be formed in part of the top surface of both small packaging boxes, making it easier to insert fingers when opening, and facilitating the opening operation. [Effects of the Invention]

[0011] The linkable packaging box of the present invention is excellent in transportability and space-saving storage, and is less likely to lose strength even when subjected to large loads or impacts during product transportation, etc. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view showing a linkable packaging box according to a first embodiment of the present invention. [Figure 2] 1 is an exploded perspective view showing a linkable packaging box according to a first embodiment of the present invention. [Figure 3] 1A and 1B are diagrams showing a linkable packaging box according to a first embodiment of the present invention, in which (a) is a plan view and (b) is a front view. [Figure 4] 1A and 1B are diagrams showing a blank sheet for a top plate of a linkable packaging box according to a first embodiment of the present invention, in which FIG. 1A shows the outer surface side, and FIG. 1B shows the inner surface side. [Figure 5] 1 is a perspective view showing a subdivision packaging box of a linkable packaging box according to a first embodiment of the present invention. FIG. [Figure 6] 1 is a diagram showing a blank sheet of a sub-packaging box of a linkable packaging box according to a first embodiment of the present invention. FIG. [Figure 7] FIG. 1 is a perspective view showing a state in which the linkable packaging box according to the first embodiment of the present invention is divided. [Figure 8] FIG. 1 is a perspective view showing a state in which the linkable packaging box according to the first embodiment of the present invention is divided. [Figure 9] 1 is a perspective view showing a state in which a divided packaging box of a linkable packaging box according to a first embodiment of the present invention has been opened. FIG. [Figure 10] FIG. 10 is a perspective view showing a linkable packaging box according to a second embodiment of the present invention. [Figure 11] 10A and 10B are diagrams showing a linkable packaging box according to a second embodiment of the present invention, in which (a) is a plan view and (b) is a front view. [Figure 12] 10A and 10B are diagrams showing a blank sheet for a top plate of a linkable packaging box according to a second embodiment of the present invention, where FIG. 10A shows the outer surface side, and FIG. 10B shows the inner surface side. [Figure 13] FIG. 10 is a perspective view showing a state in which the linkable packaging box according to the second embodiment of the present invention is divided. [Figure 14] FIG. 10 is a perspective view showing a state in which the linkable packaging box according to the second embodiment of the present invention is divided. [Figure 15] FIG. 10 is a perspective view showing a state in which a divided packaging box of a linkable packaging box according to a second embodiment of the present invention has been opened. [Figure 16] FIG. 10 is a perspective view showing another embodiment of the small-portion packaging box of the linkable packaging box of the present invention. [Figure 17] 10 is a diagram showing a blank sheet of a small-portion packaging box according to another embodiment of the linkable packaging box of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the front, back, left, and right directions are set for the convenience of explaining the linkable packaging box of each embodiment, and do not limit the configuration of the linkable packaging box of the present invention. Note that in each embodiment, the same parts are given the same reference numerals, and detailed descriptions will be omitted.

[0014] (First embodiment) 1 and 2, the linkable packaging box 1 of this embodiment is formed by two open-topped small-component packaging boxes 30, 30 connected together by a top plate 10, and has the shape of a roughly rectangular parallelepiped whose length in the left-right direction is greater than its length in the front-to-rear direction as a whole. As shown in FIG. 2, the two small-component packaging boxes 30, 30 are connected by the top plate 10 with their opposing right and left side plates 32 abutting against each other.

[0015] The top plate 10 also functions as a lid that covers the openings (apertures) 37, 37 (see Figure 2) on the top of the small packaging boxes 30, 30, and is adhered to the front, back, left and right sides of the top of the small packaging boxes 30, 30 with an adhesive such as hot melt. The top plate 10 can be separated into left and right halves by cutting a tear strip 16 (a strip-shaped tear portion) described below, and maintains its function as a lid for each of the small packaging boxes 30, 30 even after separation.

[0016] The top plate 10 comprises a base plate 11, a front flap 12 and a rear flap 13 connected to the front and rear edges of the base plate 11, and a left flap 14 and a right flap 15 connected to the left and right edges of the base plate 11.

[0017] As shown in Figures 4(a) and 4(b), the top plate 10 is formed by folding a blank sheet S1 cut out from a single sheet of cardboard at each of the creases. Figure 4(a) shows the blank sheet S1 positioned so that its outer surface is visible, while Figure 4(b) shows the blank sheet S1 positioned so that its inner surface is visible. For ease of explanation, in Figure 4(a), the creases formed on the inner surface are shown by solid lines. Each crease (fold line) on the blank sheet S1 is a linear groove (pressed crease) formed by pressing the inner surface of the blank sheet S1. Note that notches (half-cut lines, etc.) may be formed on the crease. This makes it easier to fold the blank sheet S1 at the crease. In this embodiment, notches 14a and 15a are formed in the ruled lines on the left and right edges of the substrate 11. Then, when the blank sheet S1 is folded along each of the creases, a lid-like top plate 10 is formed, which has a front flap 12 and a rear flap 13 at the front and rear, and a left flap 14 and a right flap 15 at the left and right.

[0018] The base plate 11 is a rectangular flat plate whose length in the left-right direction is greater than that in the front-rear direction. The base plate 11 covers openings 37, 37 on the top surfaces of the two small packaging boxes 30, 30.

[0019] An opening start portion 17 is formed in the approximate center of the base plate 11. The opening start portion 17 is the area that serves as the starting point when the linkable packaging box 1 is divided into two in the left-right direction and opened. The opening start portion 17 has a roughly L-shape in plan view, and is formed by a linear slit that can be easily gripped by inserting fingers.

[0020] As shown in FIG. 4(b), a single tear strip 16 is attached to the inner surface of the base plate 11, the inner surface of the front flap 12, and the inner surface of the rear flap 13 so as to intersect with the tear-opening start portion 17. The tear strip 16 is provided linearly over the entire front-to-rear direction of the base plate 11, the front flap 12, and the rear flap 13, and extends along the abutting portion where the left and right side plates 32, 32 of both small packaging boxes 30, 30 abut against each other (the left and right side surfaces). The tear strip 16 is parallel to the left and right edges of the base plate 11. The tear strip 16 is divided into front and rear portions by the tear-opening start portion 17. The boundaries of the tear strip 16 are the left and right edges of the tear strip 16 .

[0021] A pair of front and rear tear guide wires L20, L20 for opening that function as tear guide wires are formed on the left and right regions of the top plate 10, with the tear strip 16 as the boundary. The pair of front and rear tear guide wires L20, L20 for opening are connected to the tear strip 16. More specifically, the tear guide wires L20, L20 for opening are connected so as not to go beyond the boundary of the tear strip 16 and enter the inside of the tear strip 16 (within the band-shaped region sandwiched between the left and right boundaries). Note that the connection referred to here includes not only those that are directly connected to the boundary of the tear strip 16, but also those that are not connected to the boundary of the tear strip 16 but are close to and spaced apart from the boundary to the left and right.

[0022] Each tear guide line L20, L20 is a perforated line with intermittent slits. The spacing and shape of the slits of each tear guide line L20, L20 are not limited. In the left and right regions of the top plate 10, each tear guide line L20, L20 is formed symmetrically on either side of the tear strip 16. Therefore, the tear guide line L20, L20 formed in the left region of the top plate 10 will be described here, and the tear guide line L20 formed in the right region of the top plate 10 will not be described here.

[0023] The opening breaking guide wires L20, L20 include front and rear first breaking guide wires L21, L21, front and rear second breaking guide wires L22, L22, and front and rear third breaking guide wires L23, L23. The front and rear first break guide wires L21, L21 extend leftward from the front and rear vicinity of the opening start portion 17. In other words, the front and rear first break guide wires L21, L21 are formed within the plane of the substrate 11 and are connected to the opening strip 16 at positions that avoid the front and rear edge portions of the substrate 11.

[0024] The front-side second break guide wire L22 is formed continuously with the left end of the front-side first break guide wire L21 and extends diagonally forward and left toward the front edge of the base plate 11. On the other hand, the rear-side second break guide wire L22 is formed continuously with the left end of the rear-side first break guide wire L21 and extends diagonally backward and left toward the rear edge of the base plate 11. The front-side third break guide wire L23 is formed continuously with the left end of the front-side second break guide wire L22 and extends along the front edge of the base plate 11 to the left edge of the base plate 11. The rear-side third break guide wire L23 is formed continuously with the left end of the rear-side second break guide wire L22 and extends along the rear edge of the base plate 11 to the left edge of the base plate 11. In other words, the opening break guide wires L20, L20 are formed continuously over almost the entire left side region of the top plate 10 in the left-right direction.

[0025] Furthermore, a pair of front and rear board folding guide lines 19, 19 that function as folding guide lines are formed in the left and right regions of the outer surface of the substrate 11. Each board folding guide line 19, 19 is a linear groove (pressed crease) formed by pressing into the outer surface of the substrate 11. The board folding guide line 19, 19 in the left region of the substrate 11 is disposed inside the front and rear third break guide lines L23, L23 in the left region. The board folding guide lines 19, 19 are formed so that the distance between each other in the front-to-rear direction and the other board folding guide line 19 gradually decreases from the right end side of the front and rear third break guide lines L23, L23 toward the left edge of the substrate 11. On the other hand, the board bending guide lines 19, 19 in the right region of the board 11 are arranged inside the front and rear third breaking guide lines L23, L23 in the right region. These board bending guide lines 19, 19 are formed so that the distance between them in the front-rear direction gradually decreases from the left end side of the front and rear third breaking guide lines L23, L23 toward the right edge of the board 11.

[0026] Each of the flaps 12 to 15 of the top plate 10 is a rectangular flat plate. The front flap 12 extends downward from the front edge of the base plate 11. The front flap 12 is adhered across the left-right direction to the upper part of the front surface of the two small packaging boxes 30, 30. The rear flap 13 extends downward from the rear edge of the base plate 11. The rear flap 13 is adhered across the left-right direction to the upper part of the rear surface of the two small packaging boxes 30, 30. The left flap 14 extends downward from the left edge of the base plate 11. The left flap 14 is adhered across the front-to-rear direction to the upper part of the left face of the left small packaging box 30. The right flap 15 extends downward from the right edge of the base plate 11. The right flap 15 is adhered across the front-to-rear direction to the upper part of the right face of the right small packaging box 30. The front flap 12 and the rear flap 13 each have two handholds 10a.

[0027] Next, the two small packaging boxes 30, 30 will be described with reference to Figures 5 and 6. The two small packaging boxes 30, 30 on the left and right have the same configuration, so here, only the small packaging box 30 located on the left side will be described. As shown in Figure 5, the small-sized packaging box 30 has an opening 37 on the top surface. The small-sized packaging box 30 has a rectangular cylindrical body 30a and a bottom plate 36 connected to the lower edge of the body 30a. The small-sized packaging box 30 of this embodiment is a half-A type cardboard box. The opening 37 of the small-sized packaging box 30 is closed by the top plate 10 (see Figure 2) described above.

[0028] The small packaging box 30 is formed by mountain or valley folding a blank sheet S2 cut out from a cardboard sheet at each crease, as shown in Fig. 6. The blank sheet S2 shown in Fig. 6 is positioned so that the inner side is visible. Each crease (fold line) on the blank sheet S2 is a linear groove (pressed crease) formed by pressing the surface of the blank sheet S2. Note that notches may be formed on the creases. This makes it easier to fold the blank sheet S2 at the creases.

[0029] 5, the body 30a has a pair of front and rear side plates 31, 31 and a pair of left and right side plates 32, 32. The front side plate 31, the rear side plate 31, the left side plate 32, and the right side plate 32 are each a rectangular side plate. The left side plate 32 is connected to the left edge of the front side plate 31 via a crease. The right side plate 32 is connected to the right edge of the front side plate 31 via a crease. A strip-shaped joint piece 35 is connected to the rear edge of the left side plate 32 via a crease. The rear edge of the right side plate 32 is connected to the rear edge of the right side plate 32 via a crease. The joint piece 35 is joined to the inner surface of the rear side plate 31 by an adhesive such as hot melt.

[0030] A handhold 31a is formed on each of the front and rear plates 31. Notches 32a, 32a for finger hooks are formed in the center of the left and right plates 32 in the front-rear direction.

[0031] The bottom plate 36 closes the lower opening of the body 30a. The bottom plate 36 includes a pair of left and right lower inner flaps 34, 34 and lower outer flaps 33, 33 superimposed on the lower surfaces of the lower inner flaps 34, 34. The lower inner flaps 34, 34 are connected to the lower edges of the left and right side plates 32, 32. The lower outer flaps 33, 33 are connected to the lower edges of the front and rear side plates 31, 31.

[0032] Next, the procedure for opening the linkable packaging box 1 will be described with reference to FIGS. First, insert your fingers into the opening start portion 17 and cut open the tear strip 16 in the front-to-back direction while pinching the opening start portion 17 with your fingers as shown in Fig. 7. This causes the top plate 10 to be divided into two in the left-to-right direction along the cut-open tear strip 16, and as shown in Fig. 8, the small-sized packaging boxes 30, 30 can be separated while the top plate 10 remains covering the openings 37, 37 of the small-sized packaging boxes 30, 30.

[0033] Thereafter, when opening the top plate 10, the fingers are inserted into the inside of the edge of the base plate 11 through the opening formed by the opening start portion 17, and the edge of the base plate 11 is grasped and pulled upward. In this case, the notch portion 32a is located below the opening formed by the opening start portion 17, making it easy to insert the fingers into the inside of the edge of the base plate 11.

[0034] When an end of the substrate 11 is grasped and pulled upward, the front and rear first break guide wires L21, L21 of the pair of front and rear opening break guide wires L20, L20 are cut open, and then breakage progresses from the front and rear first break guide wires L21, L21 to the front and rear second break guide wires L22, L22. When the end of the substrate 11 is further pulled upward, breakage progresses from the front and rear second break guide wires L22, L22 to the front and rear third break guide wires L23, L23, and the substrate 11 can be opened as shown in FIG. 9. This allows the contents to be removed through the opening 37.

[0035] According to the linkable packaging box 1 of this embodiment described above, the two divided packaging boxes 30, 30 can be integrally connected by the top plate 10 without using conventional PP bands or large boxes, which makes it easy to transport. In addition, the two divided packaging boxes 30, 30 can be separated by cutting open the tear strip 16, which saves storage space.

[0036] Furthermore, the sub-packaging box 30 can be opened by cutting open the opening break guide lines L20, L20, making the opening operation easy. Furthermore, since the opening break guide wires L20, L20 are connected to the opening strip 16 at positions that avoid the front and rear edges of the base plate 11, even if a large load or impact is applied during product transportation, breakage is unlikely to progress from the opening strip 16 to the opening break guide wires L20, L20. Therefore, the strength of the linkable packaging box 1 can be ensured.

[0037] (Second embodiment) Next, a linkable packaging box according to a second embodiment of the present invention will be described with reference to Figures 10 to 15. The linkable packaging box 1A of this embodiment differs from the first embodiment in that it is provided with a strip-shaped opening portion 25 that is wide in the left-right direction.

[0038] 10 and 11, in this embodiment as well, the top plate 10A functions as a lid for the small-packaging boxes 30, 30. The top plate 10A is separated into left and right halves by a strip-shaped opening portion 25, and maintains its function as a lid for each of the small-packaging boxes 30, 30 even after separation (see FIG. 14).

[0039] As shown in Figures 12(a) and 12(b), the top plate 10A is formed by folding a blank sheet S3 cut out from a single sheet of cardboard at each of the creases. Figure 12(a) shows the blank sheet S3 positioned so that its outer surface is visible, while Figure 12(b) shows the blank sheet S3 positioned so that its inner surface is visible. For ease of explanation, in Figure 12(a), the creases formed on the inner surface are shown by solid lines. Each crease (fold line) on the blank sheet S3 is a linear groove (pressed crease) formed by pressing the inner surface of the blank sheet S3. Note that notches (half-cut lines, etc.) may be formed on the crease. This makes it easier to fold the blank sheet S3 at the crease. Then, by folding the blank sheet S3 along each of the creases, a lid-shaped top plate 10A is formed, which has a front flap 12 and a rear flap 13 at the front and rear, and a left flap 14 and a right flap 15 at the left and right.

[0040] The strip-shaped tearing portion 25 is provided in the center of the base plate 11 in the left-right direction, extending over substantially the entire length of the base plate 11, the front flap 12, and the rear flap 13 in the front-rear direction. As shown in FIGS. 12(a) and 12(b), the strip-shaped tearing portion 25 is defined by left and right break guide lines L25, L25 and left and right end break guide lines L27, L27 that are continuous with the front and rear ends of the left and right break guide lines L25, L25, respectively. The left and right break guide lines L25, L25 and the left and right end break guide lines L27, L27 are perforated lines formed by intermittent slits. The spacing and shape of the slits in the left and right break guide lines L25, L25 and the left and right end break guide lines L27, L27 are not limited. The boundary of the strip-shaped tearing portion 25 is the outermost edge of the left and right break guide lines L25, L25.

[0041] 14, the width of the left and right break guide lines L25, L25 and the width of the left and right end break guide lines L27, L27 are sized to straddle the abutment portion between the left and right side plates 32, 32 (left and right side surfaces) of both small packaging boxes 30, 30 in the left-right direction. In other words, the left and right break guide lines L25, L25 and the left and right end break guide lines L27, L27 are not on the abutment portion between the left and right side plates 32, 32, but are formed at positions shifted (offset positions) in the left-right direction from the abutment portion.

[0042] A cutout portion L26 that functions as a tear initiation portion for the strip-shaped tearing portion 25 is formed in the center of the substrate 11. The cutout portion L26 is parallel to the front and rear edges of the substrate 11. The strip-shaped tearing portion 25 is symmetrical in the front-rear direction across the cutout portion L26. 11(a), the left and right break induction wires L25, L25 are formed so that the distance between one break induction wire L25 and the other break induction wire L25 in the left-right direction gradually increases from the cut portion L26 toward the front edge of the substrate 11. On the other hand, the left and right break induction wires L25, L25 are formed so that the distance between one break induction wire L25 and the other break induction wire L25 in the left-right direction gradually increases from the cut portion L26 toward the rear edge of the substrate 11.

[0043] 11(b) and 12(a)(b), in the front flap 12, the left and right end break guide lines L27, L27 are formed so that the left-right distance from the other end break guide line L27 gradually decreases from the upper edge of the front flap 12 toward the lower edge of the front flap 12. On the other hand, as shown in FIGS. 12(a)(b), in the rear flap 13, the left and right end break guide lines L27, L27 are formed so that the left-right distance from the other end break guide line L27 gradually decreases from the upper edge of the rear flap 13 toward the lower edge of the rear flap 13.

[0044] The top plate 10A is formed with only front and rear third break guide wires L23, L23 as opening and breaking guide wires. The front and rear third break guide wires L23, L23 extend along the front and rear edges of the base plate 11 and are connected to the left and right break guide wires L25, L25 of the band-shaped opening portion 25. More specifically, the third break guide wires L23, L23 are connected so as not to cross the boundary of the band-shaped opening portion 25 and enter the inside of the opening portion 25 (within the area sandwiched between the left and right break guide wires L25, L25). In other words, the front and rear third break guide wires L23, L23 are not formed in the portions of the base plate 11 corresponding to the front and rear edges of the band-shaped opening portion 25. Note that the connection referred to here includes not only those directly connected to the boundary of the band-shaped opening portion 25, but also those that are not connected to the boundary of the band-shaped opening portion 25 but are close to and spaced apart from the boundary to the left and right sides.

[0045] As shown in Fig. 12(b), a pair of front and rear inner folding guide lines 18, 18 that function as folding guide lines are formed in the left and right regions of the inner surface of the substrate 11. Each inner folding guide line 18, 18 is a linear groove (pressed crease) formed by pressing the inner surface of the substrate 11. The inner folding guide line 18, 18 in the left region of the substrate 11 is located on the left side of the band-shaped opening portion 25. These inner folding guide lines 18, 18 are formed so that the distance between them in the front-to-rear direction gradually increases from the band-shaped opening portion 25 side toward the left edge of the substrate 11. On the other hand, the inner folding guide lines 18, 18 in the right region of the substrate 11 are arranged to the right of the strip-shaped tearing portion 25. These inner folding guide lines 18, 18 are formed so that the distance between them in the front-to-rear direction gradually increases from the strip-shaped tearing portion 25 side toward the right edge of the substrate 11.

[0046] Next, the procedure for opening the linkable packaging box 1A will be described with reference to FIGS. First, insert your fingers into the cut portion L26 and cut open the strip-shaped tear portion 25 in the front-to-rear direction while pinching it with your fingers, as shown in Fig. 13. This splits the top plate 10A in two in the left-to-right direction along the cut-open strip-shaped tear portion 25, and as shown in Fig. 14, the small packaging boxes 30 can be separated while most of the openings 37 of the small packaging boxes 30 are still covered by the top plate 10A. At this time, elongated openings 38 are formed in the front-to-rear direction along the cut strip-shaped tear portion 25.

[0047] Thereafter, when opening the top plate 10A, the fingers are inserted into the inside of the edge of the base plate 11 through the elongated opening 38, the edge of the base plate 11 is grasped, and the base plate 11 is pulled upward. In this case, since the notch 32a is located below, it is easy to insert the fingers into the inside of the edge of the base plate 11.

[0048] When the end of the base plate 11 is grasped and pulled upward, the front and rear third breaking guide wires L23, L23 are cut open, and the base plate 11 can be opened as shown in Fig. 15. This allows the contents to be removed through the opening 37.

[0049] The linkable packaging box 1 of this embodiment described above also provides the same effects as those of the first embodiment. In addition, the boundary of the strip-shaped opening portion 25 has a width that spans the abutting portion between the left and right side plates 32, 32 of both small packaging boxes 30, 30 in the left-right direction. Therefore, by cutting open the strip-shaped opening portion 25, openings 38, 38 can be formed in parts of the top surfaces of both small packaging boxes 30, 30, making it easier to insert fingers when opening. This makes the opening operation easier.

[0050] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be modified as appropriate within the scope of the invention. For example, in each of the above embodiments, half-A type small packaging boxes 30, 30 are used, but this is not limited to this, and a small packaging box 40 that partially adopts the structure of a wrap-around type packaging box as shown in Figures 16 and 17 may also be used.

[0051] The small-dividing packaging box 40 is formed by folding a blank sheet S4 as shown in Fig. 17. The small-dividing packaging box 40 includes a bottom plate 42, left and right side plates 41, 41 rising from the left and right edges of the bottom plate 42, front and rear inner flaps 45, 45 rising from the front and rear edges of the bottom plate 42, and left and right outer flaps 44, 44 connected to the front and rear edges of the left and right side plates 41, 41, respectively. Handles 43a, 43a are formed at the butt joints of the left and right outer flaps 44, 44. Even when such a subdivision packaging box 40 is used, the linkable packaging box 1, 1A can be suitably configured.

[0052] Although the linkable packaging boxes 1, 1A of this embodiment are made of corrugated cardboard, the packaging boxes may also be made of various known paperboards. [Explanation of symbols]

[0053] 1 Interlocking packaging box 1A Interlocking packaging box 10 Top plate 10A top plate 10a Handhold part 11 Circuit Board 12 Front flap 13 Rear flap 14 Left flap 15 Right flap 16 Opening strip (strip-shaped opening part) 17 Opening start part 25 Strip-shaped opening 30,40 Small packaging boxes 31 Side plate (left side plate, right side plate) 32 Side plate (front side plate, rear side plate) 37 Opening (Aperture) L20 Opening Breaking Guide Wire

Claims

1. A linkable packaging box is formed by abutting the left and right side surfaces of two small packaging boxes with openings at the top and connecting the two small packaging boxes with a top plate that closes both openings, A front flap is provided on the front edge of the top plate and is adhered to the upper front surface of each of the small packaging boxes; a rear flap provided at the rear edge of the top plate and bonded to the upper rear surfaces of both of the small packaging boxes; A left flap is provided on the left edge of the top plate and is adhered to the upper left surface of the left small packaging box; A right flap is provided on the right edge of the top plate and is adhered to the upper right surface of the right-side small packaging box, The top plate has: A strip-shaped opening portion is formed along the contact portion between the left and right side surfaces of the two small packaging boxes, and a pair of left and right opening break guide lines connected to the strip-shaped opening portion are formed, The pair of left and right tear guide lines for opening are formed so as not to go beyond the boundary of the strip-shaped opening portion and enter inside the opening portion, An opening start portion is formed at the approximate center of the top plate so as to intersect with the strip-shaped opening portion, and serves as a starting point when opening the top plate, The pair of left and right breaking guide wires for opening each include a front and rear first breaking guide wire, a front and rear second breaking guide wire, and a front and rear third breaking guide wire, The front and rear first breakage guide lines extend in the left and right directions from the front and rear vicinity of the opening start portion, respectively, the front and rear second breakage guide wires are formed continuously with the extended ends of the front and rear first breakage guide wires, and extend obliquely toward the front edge and the rear edge of the top plate; The front and rear third break guide wires are formed continuously with the extended ends of the front and rear second break guide wires, and extend along the front and rear edges of the top plate to the left and right edges of the top plate.

2. 2. The linkable packaging box according to claim 1, wherein the boundary of the strip-shaped opening portion has a width that spans the abutting portion between the left and right side surfaces of both the divided packaging boxes in the left-right direction.

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