Waistline-free paper container facilitating lap joint of upper opening inward-folded side pieces

Abstract

The utility model relates to the field of paper containers, and discloses a waist-line-free paper container convenient for lap joint of upper opening infolding side pieces, which comprises a body, the body comprises a bottom, front pieces extend from the front side and the rear side of the bottom respectively, one side piece of the left side and the right side of the body is a long side piece, and the other side piece is a short side piece. The edge of an upper opening of the short side piece extends to form a short inner folding piece folded inwards, the edge of an upper opening of the long side piece extends to form a long inner folding piece folded inwards, the short side piece is in lap joint with the outer side of the long side piece, the short inner folding piece is provided with a flat folding part and a folding part, and the folding part is located on one side of the long inner folding piece. The folding part can be turned upwards along a first folding line between the folding part and the flat folding part or a second folding line between the folding part and the short side piece, and the first folding line extends in the inclined upper direction from inside to outside; when the long side pieces and the long inner folding pieces are folded, the long side pieces and the long inner folding pieces can be inserted between the short side pieces and the short inner folding pieces without deformation, and the inserting parts can be abdicated only by turning the folding parts upwards.

Description

Technical Field

[0001] The utility model relates to the field of paper containers, in particular to a waistline-free paper container which is convenient for overlapping of inwardly folded side pieces of an upper opening. Background Art

[0002] In particular, paper containers have been increasingly widely used in various fields in recent years due to the biodegradable and recyclable characteristics of paper itself. For example, the Chinese invention patent with publication number CN116902368A, entitled "A paper bag with double-sided middle seal and top lapped wrapping and manufacturing process", discloses a paper bag with double-sided middle seal and top lapped wrapping, comprising a bottom surface, front surfaces are arranged on both the front and rear sides of the bottom surface, the two front surfaces are connected by two side surfaces, the side surfaces comprise a first sub-side surface and a second sub-side surface connected by adhesive, the side edge of the first sub-side surface is provided with an extension section, the upper end of the second sub-side surface is provided with a top lapped edge, the extension section is glued to the inner wall of the second sub-side surface, and then the top lapped edge is folded downward and glued to the extension end. In the case where a closing machine is not required but the paper container needs to be folded manually or by equipment before the side pieces on both sides are overlapped, it is usually necessary to deform the short side piece to form a hole and then insert the long side piece into the hole from bottom to top. This operation is not only complicated, but also easily causes creases or even slight deformation on the side of the paper container, thereby affecting the aesthetics of the paper container. Summary of the invention

[0003] The utility model aims at the shortcoming of the prior art that it is difficult to insert the side pieces when overlapping, and provides a paper container without waistline which is convenient for overlapping the side pieces of the upper opening which are folded inwards.

[0004] To solve the above technical problems, the utility model is solved by the following technical solutions:

[0005] A waistline-free paper container that is convenient for overlapping the inner folded side pieces at the upper opening comprises a body, the body comprises a bottom, and the front and rear sides of the bottom are respectively extended with positive pieces, wherein the left and right sides of each positive piece are respectively extended with a left piece and a right piece; the left and right sides of the body each have one side piece as a long side piece, and the other side piece is a short side piece, the upper edge of the short side piece is extended with a short inner folded piece folded inwardly, and the upper edge of the long side piece is extended with a long inner folded piece folded inwardly, the short side piece is overlapped on the outside of the long side piece, and the short inner folded piece has a folded flat portion and a flap The folding portion is located at one side of the long inner folding piece, and the folding portion can be folded upward along the crease line 1 between the folding portion and the folded portion or the crease line 2 between the folding portion and the short side piece, wherein the crease line 1 extends from the inside to the outside in an oblique upward direction; the overlapping portion of the long side piece and the short side piece and the long inner folding piece corresponding to the portion form an inserting portion in a folded state; a clearance space is formed between the folded portion and the short side piece after being folded up, and the clearance space is used for the inserting portion to overlap obliquely or vertically on the inner surface of the short side piece, and after the inserting portion is connected to the short side piece, the folding portion is folded down to cover the inserting portion.

[0006] Preferably, the folded portion is triangular in shape, and can be turned outward along a fold line between the folded portion and the flattened portion in a direction away from the flattened portion. The turned outward folded portion can be turned upward in a direction away from the short side piece, making it easier for the inserting portion to be inserted obliquely for overlapping. After being connected to the short side piece, the folded portion is turned down to cover the inserting portion, reducing deformation during overlapping.

[0007] Preferably, the folded portion and the flattened portion are partially cut near the edge, and the folding line 1 is connected to the cutting line.

[0008] Preferably, the folded portion is rectangular or trapezoidal.

[0009] Preferably, the folded portion and the flattened portion are completely cut, and the folded portion is connected to the short side piece and turned outward through the crease line.

[0010] Preferably, the folded portion is rectangular or trapezoidal. The completely cut folded portion can be completely separated from the short side piece and turned up, which is more convenient for overlapping the inserting part, and the inserting part can even be vertically inserted into the position, connected with the short side piece, and then the folded portion is turned down to cover the inserting part, eliminating deformation during overlapping.

[0011] Preferably, a notch is provided at the top of the inserting part on one side close to the short side piece.

[0012] Preferably, the body has a middle fold line set on the long side piece, and the short side piece and the folded portion do not exceed the straight line where the middle fold line is located. In this way, when the paper container is compressed and folded, the folding line will not pass through the overlapping part of the short side piece and the long side piece, so that the folding position of the middle fold line is thinner, the container is easier to fold, and it is also beneficial to the strength and appearance of the container.

[0013] The utility model has significant technical effects due to the adoption of the above technical solutions:

[0014] When the short side pieces located outside the long side pieces are overlapped, the long side pieces and the long inner folding pieces can be inserted between the short side pieces and the short inner folding pieces in a folded state without deformation, and the insertion part can be made to give way by simply turning up the folded part;

[0015] The invention solves the problem that the traditional paper container with the upper opening folded in advance and the side sealed in the middle may be creased or deformed due to twisting when the side is overlapped, which affects or even destroys the appearance of the paper container. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural schematic diagram and a molding flow chart of Example 1;

[0017] Figure 2 is a schematic structural diagram of the short side piece of Example 1;

[0018] Figure 3 1 is a schematic diagram of the coordination of the short side piece and the long side piece of Example 1;

[0019] Figure 4 is a schematic diagram of a portion of the folded portion and the flattened portion of Example 1 being cut off near the edge;

[0020] Figure 5 is a schematic structural diagram of the folding portion of Embodiment 2 in an upwardly turned state;

[0021] Figure 6 This is a schematic structural diagram of Example 2 after the folding portion is folded down to cover the inserting portion;

[0022] Figure 7 This is an expanded view of Example 2.

[0023] The names of the parts indicated by the numerical labels in the above drawings are as follows: 1, bottom; 2, main piece; 3a, long side piece; 3b, short side piece; 4a, long inner folding piece; 4b, short inner folding piece; 41, folded part; 42, folded part; 43, crease line one; 44, crease line two; 45, make way; 5, inserted part; 51, notch; 6, center fold line. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] Example 1

[0026] A paper container without waistline that is convenient for overlapping the inner folded side panels of the upper opening, such as Figure 1As shown, the main body includes a bottom 1, and the front and rear sides of the bottom 1 are respectively extended with positive sheets 2, wherein the left and right sides of each positive sheet 2 are respectively extended with left sheets and right sheets; the left and right sides of the main body each have one side sheet as a long side sheet 3a, and the other side sheet is a short side sheet 3b, and the upper edge of the short side sheet 3b extends with a short inner folding sheet 4b folded inwardly, and the upper edge of the long side sheet 3a extends with a long inner folding sheet 4a folded inwardly, the short side sheet 3b is overlapped on the outer side of the long side sheet 3a, and the short inner folding sheet 4b has a folded portion 41 and a folded portion 42, and the folded portion 42 Located on one side of the long inner folding piece 4a, the folding portion 42 can be folded upward along a crease line 43 between the folding portion 42 and the folded portion 41, wherein the crease line 43 extends from the inside to the outside in an oblique upward direction; the overlapping portion of the long side piece 3a and the short side piece 3b and the corresponding long inner folding piece 4a form an inserting portion 5 in the folded state; a clearance space 45 is formed between the folded-up folding portion 42 and the short side piece 3b, and the clearance space 45 is for the inserting portion 5 to be obliquely or vertically overlapped on the inner surface of the short side piece 3b. After the inserting portion 5 is connected to the short side piece 3b, the folding portion 42 is folded down to cover the inserting portion 5.

[0027] In one embodiment, the folded portion 42 is triangular in shape. Figure 2 As shown, the fold line 43 can extend to the outer bottom corner of the short side panel 3b. Figure 3 As shown, the folded portion 42 can also extend to the bottom edge of the short side piece 3b, and the folded portion 42 can be turned outward along the fold line 43 between the folded portion 42 and the folded portion 41 in a direction away from the folded portion 41. The top of the fold line 43 can extend to the top corner of the short side piece 3b, or slightly outward to form a larger space for the other side inserting portion 5.

[0028] As another embodiment, Figure 4 As shown, the folded portion 42 and the flattened portion 41 are partially cut near the edge, and the folding line 43 is connected to the cutting line. The folded portion 42 is rectangular or trapezoidal or other shapes that can be easily imagined by those skilled in the art. In this way, when the inserting portion 5 overlaps the short side piece 3b, as long as the folded portion 42 is turned outward, the inserting portion 5 can enter the clearance space 45 between the folded portion 42 and the short side piece 3b obliquely or from the side, without twisting the long side piece 3a.

[0029] In order to further facilitate the insertion of the inserting portion 5, a notch 51 may be selectively provided at the top of the inserting portion 5 on a side close to the short side piece 3b.

[0030] The main body has a center fold line 6 arranged on the long side piece 3a, and the short side piece 3b and the folded portion 42 do not exceed the straight line where the center fold line 6 is located.

[0031] Normally, the bottom of the main body has a V-shaped crease line with an endpoint located at the bottom center fold line. After the container is in the formed state, it can be further compressed and folded so that the two side plates overlap and the bottom is folded inward into an M-bottom state. The bottom center fold and the side center fold lines 6 of the folded tongue plate are all located in the same plane. After forming, all the folds are at the bottom, the main plate has no crease waistline, and the side has only a center fold line without other crease waistlines. The bag mouth is folded inward all around, and the main plate has a hand rope threading opening folded inward. The two ends of the hand rope are fixed to the inner side of the main plate through the rope threading holes from the outside of the bag mouth extension. This structure has nothing to do with the technical problem to be solved by the utility model, is not the focus of this application, and will not be elaborated here.

[0032] Example 2

[0033] The basic structure is the same as that of Example 1. Figure 5-7 , the difference is that: the folding portion 42 is located on one side of the long inner folding piece 4a, and the folding portion 42 can be turned up or turned down along the folding line 44 between the folding portion 42 and the short side piece 3b to cover the inserting portion 5. The folding portion 42 and the flattened portion 41 are completely cut off, and the folding portion 42 is connected to the short side piece 3b and turned outward through the folding line 44. The folding portion 42 is rectangular or trapezoidal or other shapes that can be easily thought of by people in this field. It is a rectangle in the figure. In this way, when the inserting portion 5 overlaps with the short side piece 3b, as long as the folding portion 42 is turned outward to be fully opened, the inserting portion 5 can vertically or obliquely enter the clearance space 45 between the folding portion 42 and the short side piece 3b, without twisting the long side piece 3a.

[0034] In the description of the present utility model, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0035] In short, the above is only a preferred embodiment of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model should fall within the scope of the present utility model patent.

Claims

1. A paper container without a waistline that is convenient for overlapping the upper inner folded side pieces, comprising a body, the body comprising a bottom (1), front and rear sides of the bottom (1) are respectively extended with positive pieces (2), wherein the left and right sides of each positive piece (2) are respectively extended with a left piece and a right piece; the left and right sides of the body each have one side piece being a long side piece (3a), and the other side piece being a short side piece (3b), the upper edge of the short side piece (3b) extending with a short inner folded piece (4b) folded inwardly, and the upper edge of the long side piece (3a) extending with a long inner folded piece (4a) folded inwardly, the short side piece (3b) overlapping the outer side of the long side piece (3a), characterized in that: The short inner folding piece (4b) comprises a folding portion (41) and a folding portion (42), wherein the folding portion (42) is located on one side of the long inner folding piece (4a), and the folding portion (42) can be folded upward along a folding line 1 (43) between the folding portion (42) and the folding portion (41) or a folding line 2 (44) between the folding portion (42) and the short side piece (3b), wherein the folding line 1 (43) extends from the inside to the outside in an obliquely upward direction; the long side piece (3 a) The portion overlapping the short side piece (3b) and the long inner folded piece (4a) corresponding to the portion form an inserting portion (5) in a folded state; a clearance space (45) is formed between the folded portion (42) and the short side piece (3b) after being turned up, and the clearance space (45) allows the inserting portion (5) to be obliquely or vertically overlapped on the inner surface of the short side piece (3b); after the inserting portion (5) is connected to the short side piece (3b), the folded portion (42) is turned down to cover the inserting portion (5).

2. A waistline-free paper container that facilitates overlapping of the upper inwardly folded side panels according to claim 1, characterized in that: The folded portion (42) is triangular in shape, and can be turned outward along a fold line (43) between the folded portion (42) and the flattened portion (41) in a direction away from the flattened portion (41).

3. A waistline-free paper container that facilitates overlapping of the upper inwardly folded side panels according to claim 1, characterized in that: The portion between the folded portion (42) and the flattened portion (41) is cut near the edge, and the folding line 1 (43) is connected to the cutting line.

4. A waistline-free paper container that facilitates overlapping of the upper inwardly folded side panels according to claim 3, characterized in that: The folding portion (42) is rectangular or trapezoidal.

5. A waistline-free paper container that facilitates overlapping of the upper inwardly folded side panels according to claim 1, characterized in that: The folded portion (42) and the flattened portion (41) are completely cut off, and the folded portion (42) is connected to the short side piece (3b) and turned outward through the second folding line (44).

6. A waistline-free paper container that facilitates overlapping of the upper inwardly folded side panels according to claim 5, characterized in that: The folding portion (42) is rectangular or trapezoidal.

7. A waistline-free paper container that facilitates overlapping of the upper inwardly folded side panels according to any one of claims 1 to 6, characterized in that: A notch (51) is provided at the top of the inserting portion (5) on a side close to the short side piece (3b).

8. A waistline-free paper container that facilitates overlapping of the upper inwardly folded side panels according to any one of claims 1 to 6, characterized in that: The main body has a center fold line (6) arranged on the long side piece (3a), and the short side piece (3b) and the folded portion (42) do not exceed the straight line where the center fold line (6) is located.

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