CN213414510U - Bottom locking structure for paper box - Google Patents

Abstract

The utility model discloses a paper box bottom locking structure, which comprises a plurality of side plates which can be enclosed into a ring, wherein the lower side edge of each side plate is connected with a bottom plate, each bottom plate can be bent to be in the same horizontal plane, and one bottom plate is a half-cut bottom plate; the half-cut bottom plate is connected with the adjacent side plate by a crease line on the left side, and the right side is separated by a cutting line; the left end point of the cutting line extends upwards and is provided with a longitudinal crease line, and the left end point of the cutting line extends upwards leftwards and is provided with an oblique crease line; the width of the adjacent bottom plate on the right side of the half-cut bottom plate is a, the distance from the intersection point of the longitudinal crease line and the upper side edge of the half-cut bottom plate to the right side edge of the half-cut bottom plate is b, and a is larger than b. The utility model has the advantages that: only one bottom plate is provided with crease lines, and only 2 bottom plates need to be subjected to complex bending operation during folding, so that the folding efficiency is high; the formed lock bottom structure has good firmness.

Description

Bottom locking structure for paper box

Technical Field

The utility model belongs to the carton packing field specifically is a carton lock end structure.

Background

A carton represented by the 0201 box type has 4 bottom panels independent of each other. After folding into a carton, the 4 bottom panels need to be secured together to form the bottom of the carton. The conventional method is to bend the bottom plates inward in pairs to be horizontal and fix them by tape-paper bonding or staple-binding on the outer side faces of a pair of bottom plates located therebelow. In this way, materials and tools for fixing need to be additionally equipped, the operation is complex, and the fixed paper boxes cannot be disassembled without damage for repeated recycling, so that most of the paper boxes can only be used once, and the waste of resources is increased. Chinese patent document CN210391876U discloses a "tape-free three-cycle packaging carton" in 24/4/2020, which comprises a closure flap, a rear panel, a right end panel, a front panel and a left end panel, which are sequentially folded and connected. The upper side of the rear plate is connected with a first cover plate, the lower side of the rear plate is connected with a first bottom plate, an anti-theft mortise lock and a tearing line are arranged on the first cover plate, the upper side of the right end plate is connected with a second cover plate, and the lower side of the right end plate is connected with a dustproof flap. The second cover plate and the fourth cover plate are provided with inserting seams, tearing lines and an anti-theft mortise lock, the upper side of the front plate is connected with the third cover plate and the auxiliary flap, the lower side of the front plate is connected with the second bottom plate, the inserting seam is arranged at the joint of the third cover plate and the front plate, the inserting seam is arranged at the folding joint of the third cover plate and the auxiliary flap, the tearing lines are arranged on the upper portion of the third cover plate, the upper side of the left end plate is connected with the fourth cover plate, and the lower side of the left end plate is connected with the second dustproof flap. The bottom of the tape-free three-cycle packaging carton box adopts a self-locking bottom structure, so that the strength is high; adhesive tapes are not used, so that the environment is protected; can be recycled for three times. The scheme gets rid of the dependence on adhesive tape paper or staples, and self-locking can be realized only by the structural design of the bottom plate of the paper box. However, in the scheme, crease lines are designed on the two bottom plates, and when the folding machine is folded, the 4 bottom plates are required to be subjected to complex bending deformation, so that the folding efficiency is not high enough; the lock bottom structure formed by folding has lower firmness.

SUMMERY OF THE UTILITY MODEL

The folding efficiency of the existing paper box bottom locking structure is low, and the structural strength is poor. Based on the above problems, the utility model provides a bottom locking structure of a paper box, which only designs crease lines on one bottom plate, and only needs to perform complex bending operation on 2 bottom plates during folding, and the folding efficiency is high; the formed lock bottom structure has good firmness.

In order to realize the purpose of the invention, the utility model adopts the following technical scheme: a bottom locking structure of a paper box comprises a plurality of side plates which can be encircled into a ring, the lower side edge of each side plate is connected with a bottom plate, the bottom plates can be bent to be positioned on the same horizontal plane, and one bottom plate is a half-cut bottom plate; the half-cut bottom plate is connected with the adjacent side plate by a crease line on the left side, and the right side is separated by a cutting line; the left end point of the cutting line extends upwards and is provided with a longitudinal crease line, and the left end point of the cutting line extends upwards leftwards and is provided with an oblique crease line; the width of the adjacent bottom plate on the right side of the half-cut bottom plate is a, the distance from the intersection point of the longitudinal crease line and the upper side edge of the half-cut bottom plate to the right side edge of the half-cut bottom plate is b, and a is larger than b.

The carton lock bottom structure designed by the technical scheme comprises a plurality of side plates like the traditional structure, and the side plates surround the periphery to form the side wall of the carton. The number of the side plates is not limited, and may be 3, 4 or more. The lower side of each side plate is connected with a bottom plate, and the bottom plates can be positioned on the same horizontal plane after being bent inwards. The adjacent bottom plates are overlapped end to end in sequence to form the bottom of the carton. One of the plates has a special design and is called a half-cut plate. The relationship between the bottom plate and the adjacent side plate is half cut, the left side is connected by a crease line, and the right side is separated by a cutting line. Two crease lines are arranged on the half-cut bottom plate, and the lower part of the bottom plate is started from the left end point of the cut line. One is a longitudinal crease line which extends upwards to the upper side of the half-cut bottom plate, the other is an oblique crease line which extends upwards leftwards, the terminal point can be the upper side of the half-cut bottom plate or the left side of the half-cut bottom plate, and if the upper left corner of the half-cut bottom plate is an oblique angle, the terminal point can also be the oblique edge on the upper left side of the half-cut bottom plate. The two crease lines divide the half-cut bottom plate into a left lower piece of the half-cut bottom plate, a left upper piece of the half-cut bottom plate and a right piece of the half-cut bottom plate. The width of the adjacent bottom plate on the right side of the half-cut bottom plate is a, the distance from the intersection point of the longitudinal crease line and the upper side edge of the half-cut bottom plate to the right side edge of the half-cut bottom plate is b, and a is larger than b. In the design, when all side plates surround to form an annular side wall and all bottom plates bend inwards, other bottom plates are sequentially overlapped and locked end to end, the half-cut bottom plate cannot be simply overlapped with the bottom plates on two adjacent sides, and the half-cut bottom plate needs to bend inwards and downwards along an oblique crease line so that the main part of the right piece of the half-cut bottom plate is tightly attached to the upper part of the adjacent bottom plate on the left side, the upper left corner of the adjacent bottom plate on the right side is slightly pried up, the upper right corner of the right piece of the half-cut bottom plate is inserted into the lower part of the upper left corner of the adjacent bottom plate on the right side, the whole of the right piece of the half-cut bottom plate is slowly pushed into the lower part of the upper left corner of the adjacent bottom plate on the right side, the lower left piece of the half-cut bottom plate and the upper left piece of the half-cut bottom plate also translate along with the upper left corner of the adjacent bottom plate, the lower left piece of the half-cut bottom plate and the upper left piece of the half-cut bottom plate bend, the curvature disappears and the entire half-cut bottom plate returns to a flat state. At the moment, the left end of the half-cut bottom plate is overlapped and pressed on the right end of the adjacent bottom plate on the right side, and the left end of the half-cut bottom plate is overlapped and pressed by the right end of the adjacent bottom plate on the left side, so that the circular locking of all the bottom plates is completed. In the laminating structure of the half-cut bottom plate and the adjacent right bottom plate, the width of the right bottom plate is larger than the distance from the intersection point of the longitudinal crease line and the upper side edge of the half-cut bottom plate to the right side edge of the half-cut bottom plate, so that the right bottom plate completely covers the longitudinal crease line, and the half-cut bottom plate is ensured not to be bent and deformed along the longitudinal crease line, thereby causing locking failure. In the locking structure, auxiliary materials such as a box sealing belt, a staple and the like are not needed, a complicated folding structure is not needed to be designed on each bottom plate, only one bottom plate is specially designed, and only two bottom plates are specially bent, so that the bottom locking can be realized. The bottom locking structure can be unlocked, and the paper box can be recycled, so that the waste of resources is reduced.

Preferably, the oblique crease line is an angular bisector of the longitudinal crease line and the crease line connecting the half-cut bottom panel and the adjacent side panel. With the angular bisector that the line is drawn as the crease line of indulging and half cut the continuous crease line of bottom plate and adjacent curb plate to the oblique crease line, can be when half cut open the bottom plate at initial folding, with the crease line location to with half cut the bottom plate and the crease line coincidence of continuous curb plate, fold more easily, efficiency is higher.

Preferably, the longitudinal crease line is perpendicular to the cut line. By selecting the scheme, the longitudinal crease line separating the left upper sheet of the half-cut bottom plate and the right sheet of the half-cut bottom plate can coincide with the cut-off line separating the right sheet of the half-cut bottom plate and the connected side plates when the half-cut bottom plate is folded, so that the right sheet of the half-cut bottom plate can not protrude to the right side too much, and the splicing difficulty is caused.

Preferably, the left side edge of the adjacent bottom plate on the right side of the half-cut bottom plate is a bevel edge extending from the lower left to the upper right. Half left side limit of cutting the adjacent bottom plate on bottom plate right side designs for the hypotenuse, only needs little amplitude upwards to prize, just can let half cut the bottom plate upper right corner insert, has reduced the degree of buckling, has improved folding efficiency.

Preferably, the left side edge of each bottom plate is a hypotenuse extending from the bottom left to the top right. The scheme can reduce the turning angle of each bottom plate during head and tail laminating, and can improve the folding efficiency.

To sum up, the beneficial effects of the utility model are that: only one bottom plate is provided with crease lines, and only 2 bottom plates need to be subjected to complex bending operation during folding, so that the folding efficiency is high; the formed lock bottom structure has good firmness.

Drawings

Fig. 1 is a schematic view of the cutting piece of the present invention, wherein the dotted line is a crease line and the solid line is a cutting line.

Fig. 2 to 5 are schematic views of the folding and forming steps of the cut pieces of the present invention.

Wherein: the front panel comprises a front side panel A, a front top panel A1, a front bottom panel A2, a left side panel B, a left top panel B1, a left bottom panel B2, a left lower half-cut bottom panel B21, a left upper half-cut bottom panel B22, a right half-cut bottom panel B23, a rear side panel C, a rear top panel C1, a rear bottom panel C2, a right side panel D1, a right bottom panel D2, a connecting panel E, a half-cut bottom panel cutting line 1, a longitudinal crease line 2 and an oblique crease line 3.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

The embodiment is a paper box lock bottom structure which is made of white cardboard.

For convenience of illustration, the drawings in the embodiments are upside down with the cassette bottom up.

The cutting piece of the bottom structure of the carton lock of the embodiment is an improved structure based on the 0201 type carton. As shown in fig. 1, a front side plate a, a left side plate B, a rear side plate C, a right side plate D and a connecting plate E are sequentially connected from left to right, wherein the connecting plate E is fixedly connected with the inner side of the left end of the front side plate a so as to surround all the side plates to form a ring. A front top plate A1 is arranged below the front side plate A, and a front bottom plate A2 is arranged above the front side plate A; a left top plate B1 is arranged below the left side plate B, and a left bottom plate B2 is arranged above the left side plate B; a rear top plate C1 is arranged below the rear side plate C, and a rear bottom plate C2 is arranged above the rear side plate C; the lower part of the right side plate D is provided with a right top plate D1, and the upper part is provided with a right bottom plate D2. The right sides of the four bottom plates are all vertical, the left sides are all inclined sides extending along the left-lower-right-upper direction, the top sides are straight sides parallel to the bottom sides, and the heights of all the bottom sides are a.

Wherein the left bottom panel B2 is a half-cut bottom panel, namely: the left side of the connecting side of the left bottom panel B2 and the left side panel is a crease line and the right side is a cut line, which is designated as a half-cut bottom panel cut line 1. A longitudinal crease line 2 is provided extending right above the left end point of the half-cut bottom plate cutting line 1 as a starting point, and the longitudinal crease line 2 is perpendicular to the half-cut bottom plate cutting line 1 and extends up to the upper side edge of the left bottom plate B2. The left end point of the half-cut bottom plate cutting line 1 is taken as a starting point, an oblique crease line 3 is arranged extending towards the left upper side, and the oblique crease line 3 is an angular bisector of the longitudinal crease line 2 and the half-cut bottom plate cutting line 1. In this example, the oblique crease line 3 extends all the way to the left side edge of the left bottom panel B2. The longitudinal crease line 2 and the oblique crease line 3 divide the left bottom plate B2 into three parts, namely a left lower half-cut bottom plate left sheet B21, a left upper half-cut bottom plate left upper sheet B22 and a right half-cut bottom plate B23. Wherein the width of the half-cut bottom plate right piece B23 is B, and a is more than B.

To reduce space, the corresponding Chinese name is replaced with an icon in the step of introducing the folding of the panel.

The folding steps of this cut-parts are as follows:

step one, as shown in fig. 2, the left end of a2 is overlapped at the right end of D2, and the left end of D2 is overlapped at the right end of C2; keeping B2 in a free state;

step two, as shown in fig. 3, bending the B22 inwards and downwards along the direction 3 until the B8932 is tightly attached to the B21, so that the B23 is placed on the a2 in a follow-up manner, at this time, the crease line connected between the B21 and the B coincides with the 2, and the extension lines of the 1 and the 3 coincide;

step three, as shown in fig. 4, slightly prying the upper left corner of the C2, and inserting the lower right corner of the B23 into the gap; b23 is partially overlapped on A2 and partially overlapped by C2;

step four, as shown in fig. 5, B23 is pushed counterclockwise below C2, B22 and B21 are bent and then flattened, so that the three components B21, B22 and B23 are restored to the same plane. The right end of B2 is overlapped by the left end of C2, the left end of B2 is overlapped on the right end of A2, and the encircling locking of A2, B2, C2 and D2 is completed.

In the carton bottom locking structure, only crease lines are designed on one bottom plate, and only 2 bottom plates need to be subjected to complex bending operation during folding, so that the folding efficiency is high; the formed lock bottom structure has good firmness.

Claims (5)

1. A bottom locking structure of a paper box comprises a plurality of side plates which can be encircled into a ring, the lower side edge of each side plate is connected with a bottom plate, and the bottom plates can be bent to be positioned on the same horizontal plane; the half-cut bottom plate is connected with the adjacent side plate by a crease line on the left side, and the right side is separated by a cutting line; the left end point of the cutting line extends upwards and is provided with a longitudinal crease line, and the left end point of the cutting line extends upwards leftwards and is provided with an oblique crease line; the width of the adjacent bottom plate on the right side of the half-cut bottom plate is a, the distance from the intersection point of the longitudinal crease line and the upper side edge of the half-cut bottom plate to the right side edge of the half-cut bottom plate is b, and a is larger than b.

2. A carton lock base structure as in claim 1 wherein the oblique crease lines are angular bisectors of the longitudinal crease lines and the crease lines connecting the half-cut bottom panel to the adjacent side panel.

3. A carton closure base structure as claimed in claim 1 or claim 2, in which the longitudinal crease line is perpendicular to the cut line.

4. A carton lock bottom structure as claimed in claim 1 or 2, wherein the left side edge of the adjacent bottom panel on the right side of the half-cut bottom panel is a bevelled edge extending from the left lower to the right upper.

5. A carton lock base structure as claimed in claim 1 or claim 2, wherein the left side edge of each base panel is a bevelled edge extending from the left lower to the right upper.

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