TWI851061B - Paper box structure - Google Patents

Abstract

The present invention relates to a paper box structure, which is composed of a sheet of paperboard, the paperboard is formed with a bottom sheet located in the center, and two first and second side panels are respectively extended from the sides of the bottom sheet opposite to each other, and a triangular folding web is formed between the adjacent first and second side panels, and the first and second side panels are respectively extended outward to form a first and second upper lip panel and a first and second lower lip panel that can be folded up and down and horizontally overlapped. The feature of the present invention is that the first and second upper lip pieces connected to the first and second side pieces have an extension piece at both ends, and the extension pieces at both ends have convergent butt-jointed oblique edges, and the first and second lower lip pieces connected to the first and second upper lip pieces have a first convex cover piece at both ends, so that the butt-jointed oblique edges of the corners can be kept horizontal without any height difference, so that the height difference can avoid affecting the sealing effect during the adhesive film bonding.

Description

Paper box structure

The present invention belongs to the technical field of one-piece paper boxes. Specifically, it is a paper box structure formed by folding and gluing, so that the top surface of the horizontal lip can be kept flat, so that when the adhesive film is glued, the height difference can be avoided to affect the gluing effect, and its leak-proof effect and bonding strength can be further improved.

In the past, food containers were mainly iron boxes or plastic boxes. Iron boxes are mainly made of metal, which is expensive and difficult to use in mass production. As environmental awareness continues to rise, plastic boxes are too damaging to the environment. Therefore, current regulations gradually reduce the use of plastic packaging containers, and businesses also follow the policy to switch to paper containers. In order to save transportation and storage space, general paper containers use pre-pressed folds and cuts on a one-piece paper board to form a bottom sheet, multiple side sheets and a cover sheet. Before use, the box body with an opening facing upward and a cover sheet that can be selectively closed can be folded along the folds and cuts to meet the needs of food packaging and packaging.

In recent years, due to the substantial increase in the number of people eating out and the number of times they eat out, the microwave foods provided by general convenience stores and supermarkets have become more diverse. In consideration of a longer shelf life and better sales appearance, the paper boxes used for microwave foods are usually double-folded lip paper boxes with horizontal lips on the edges for direct adhesive film adhesion. As shown in the first to fourth figures, the existing double-folded lip paper boxes are formed by folding a sheet of paper board (10) to form a box-shaped structure with an opening facing upward. The paper board (10) has a bottom film (11) at the center, and the bottom film (11) has two first side panels (12) and two second side panels (13) that can be folded upward on two opposite sides of the periphery. The first side panels (12) and the second side panels (13) are respectively extended from the first side panels (12) and the second side panels (13) that can be folded upward. The side panels (12) and the second side panels (13) can be folded and erected relative to the bottom panel (11). A triangular folding web portion (14) is formed between the adjacent first side panels (12) and the second side panels (13) so that the bottom panel (11), the first side panels (12), the second side panels (13) and the folding web portion (14) can be folded relative to each other to form a receiving space (15) with an opening facing upward. In this way, the bottom and the periphery of the double-folding lip paper box can form a seamless structure. The edge of the first side panel (12) different from the bottom panel (11) respectively extends outward to form a first upper lip panel (161) and a first upper lip panel (162) which can be folded relative to each other to form a horizontal lip. The first lower lip piece (165) is provided with a second upper lip piece (171) and a second lower lip piece (175) which are respectively extended outward from the edge of the second side piece (13) and can be folded relative to each other to form a horizontal lip, so as to increase the support strength of the horizontal lip and provide the adhesive film for flat adhesion. The two ends of the first upper lip piece (161) have an extended upper cover piece (162) which exceeds the length of the first side piece (12), and the two ends of the first lower lip piece (165) have a first connecting oblique edge (166) which is converged toward the edge. As for the two ends of the second upper lip piece (171), they have a second upper lip piece (171) which can be folded relative to the first connecting oblique edge (166) after bending. 66) and the second lower lip (175) has an extended lower cover (176) that exceeds the length of the second upper lip (171). In this way, when the box is folded, the first lower lip (165) and the first and second butted oblique edges (166, 172) of the second upper lip (171) can be butted and fitted, and the extended upper cover (162) of the first upper lip (161) and the extended lower cover (176) of the second lower lip (175) can respectively cover the connection line that exceeds the first and second butted oblique edges (166, 172) (as shown in the third and fourth figures), thereby achieving the purpose of preventing corners from leaking, thereby avoiding the occurrence of leakage.

However, there are some problems with this design. First, when the extended upper cover sheet (162) of the first upper lip sheet (161) covers the joint of the first and second abutting bevel edges (166, 172) that are relatively close to each other, a height difference is formed between the extended upper cover sheet (162) of the first upper lip sheet (161) and the surface of the second upper lip sheet (171). As a result, when the adhesive film is sealed and bonded, it cannot be completely bonded, and a small gap may be generated, which may cause leakage and even affect the preservation of food. Furthermore, although the extended lower cover sheet (176) of the second lower lip sheet (175) can cover the lower seam of the first and second abutting bevel edges (166, 172) that are relatively close to each other, it is limited by the overall edge width, and the area of the extended lower cover sheet (176) that can be pasted to the first lower lip sheet (165) becomes very small. Therefore, after pasting, there is a problem of ineffective adhesion, and even bulging may occur, affecting the subsequent product yield and leak-proof effect.

In other words, the existing double-lip paper boxes have problems of height difference and ineffective bonding at the corner joints, which not only reduces the production yield, but also the sauce contained in the box body will still leak from the seams at the corner overlaps, causing the palms to be stained with sauce during use, which will affect the mood and hygiene of eating. Therefore, the existing ones do need to be further improved, and how to solve this problem is what the industry is eager to think about, and this is also the topic that the present invention wants to explore.

Due to the above shortcomings and needs, the inventor has studied the above shortcomings and needs with his many years of experience in related technologies and product design and manufacturing, and actively sought solutions. After continuous efforts in research and trial production, he finally successfully developed a paper box structure to overcome the inconvenience and trouble caused by the height difference and small pasting area of the existing corner joints.

Therefore, the main purpose of the present invention is to provide a paper box structure that can keep the top surface of the horizontal lip flat, so that when the adhesive film is pasted, the height difference can be avoided to affect the sealing effect during the adhesion, and its anti-leakage effect can be further improved.

In addition, another main purpose of the present invention is to provide a paper box structure that can increase the bonding area and overlap effect, thereby improving its bonding effect and bonding strength.

To this end, the present invention mainly realizes the above-mentioned purpose and performance through the following technical means. It is composed of a sheet of paperboard, which is formed with a plurality of pre-stressed fold lines to form a bottom sheet located in the center, and two first side sheets and two second side sheets with the same height and capable of being folded upward are respectively extended from two opposite sides of the periphery of the bottom sheet, and a triangular folding web is formed between the adjacent first side sheets and the second side sheets, so that The first side pieces and the adjacent second side pieces can be folded relative to each other by the folded webs to form an upwardly opening accommodation space, and the first side pieces respectively extend outward from the edge of the bottom piece to form a first upper lip piece and a first lower lip piece that can be folded relative to each other and horizontally overlapped, and the second side pieces respectively extend outward from the edge of the bottom piece to form a second upper lip piece and a second lower lip piece that can be folded relative to each other and horizontally overlapped, and the characteristics are;

The two ends of the first upper lip piece connected to the first side pieces have extension pieces that exceed the length of the first side pieces, and the extension pieces at both ends have butt-joint oblique edges that converge toward the first side pieces. The two ends of the first lower lip piece connected to the first upper lip piece have first lower convex covering pieces that are equal in length to the corresponding extension pieces. As for the two ends of the second upper lip piece connected to the second side pieces, they also have extension pieces that exceed the length of the second side pieces, and the extension pieces at both ends have butt-joint oblique edges that converge toward the second side pieces.

The adjacent first upper lip piece and the second upper lip piece can be butted against each other at the butted edges, and the first lower convex cover piece of the first lower lip piece is overlapped and fixed on the bottom surface of the seam of the butted edges, and the second lower convex cover piece of the second lower lip piece can be overlapped and fixed on the bottom surface of the first lower convex cover piece.

Through the concrete implementation of the aforementioned technical means, the paper box structure of the present invention can utilize the butted oblique edges located at the corners to be formed on the adjacent first upper lip piece and the second upper lip piece, so that when the relative bends are horizontally overlapped, they can remain horizontal without generating height differences, and the top surface of the horizontal lip portion of the paper box structure of the present invention can be kept flat, so that when the adhesive film is pasted, the height difference can be avoided to affect the sealing effect during the bonding. Furthermore, since the first and second lower convex covering sheets of the first and second lower lip pieces can be sequentially overlapped and adhered to the seam bottom surfaces of the butted oblique edges and the bottom surface of the first lower convex covering sheet, it can increase the bonding area and overlapping area, improve its bonding effect and bonding strength, effectively improve its practicability, and further improve its added value and economic benefits.

The present invention also utilizes the following technical means to further achieve the aforementioned objectives and effects; they include:

The first and second downward convex covering sheets can be selected from arc-shaped sheets.

In order to enable the Honorable Review Committee to further understand the structure, features and other purposes of the present invention, several preferred embodiments are given below, and detailed descriptions are provided with accompanying drawings, so that those familiar with the technical field can implement them in detail.

10: Cardboard

11: Film

12: First side stand

13: Second side stand

14: Folding webbed part

15: Storage space

161: First upper lip piece

162: Extended upper cover

165: First lower lip piece

166: First butt bevel edge

171: Second upper lip piece

172: Second butt bevel edge

175: Second lower lip piece

176: Extended lower cover

50: Cardboard

51: Negatives

52: First side stand

53: Second side stand

54: Folded webbed part

55: Storage space

561: First upper lip piece

562: Extension piece

563: Butt bevel edge

565: First lower lip piece

566: First convex cover

571: Second upper lip piece

572: Extension piece

573: Butt bevel edge

575: Second lower lip piece

576: Second lower convex cover

Figure 1: Schematic diagram of the paperboard appearance of the existing double-lip paper box.

Figure 2: Schematic diagram of the folding action of the existing double-lip paper box.

Figure 3: Schematic diagram of the partial corner appearance of the existing double-lip paper box.

Figure 4: A schematic diagram of the folded appearance of an existing double-lip paper box, to illustrate its assembled state.

Figure 5: A schematic diagram of the paperboard appearance of the paper box structure of the present invention, to illustrate its unfolded state.

Figure 6: A schematic diagram of the bending action of the paper box structure of the present invention, used to illustrate its folded state and its relative relationship.

Figure 7: Schematic diagram of the partial corner appearance of the paper box structure of the present invention.

Figure 8: A schematic diagram of the folded appearance of the paper box structure of the present invention, to illustrate its assembled state.

The present invention is a paper box structure. The attached drawings illustrate the specific embodiments of the present invention and its components. All references to front and back, left and right, top and bottom, upper and lower, and horizontal and vertical are only used for the convenience of description and do not limit the present invention or its components to any position or spatial direction. The dimensions specified in the drawings and the specification can be changed according to the design and requirements of the specific embodiments of the present invention without departing from the scope of the patent application of the present invention, so the patent application is not limited by this structure.

The structure of the paper box structure of the present invention is shown in the fifth and sixth figures. It is composed of a sheet of paperboard (50), and uses pre-formed pre-stressed fold lines to form a box-shaped structure with an opening facing upward through folding and bonding;

The detailed structure of the present invention is as disclosed in the fifth, sixth, seventh and eighth figures. The paperboard (50) is formed with a plurality of pre-stressed fold lines to form a bottom sheet (51) located in the center, and two first side panels (52) and two second side panels (53) of equal height and capable of being folded upward are respectively extended from two opposite sides of the bottom sheet (51). Furthermore, the adjacent first side panels (52) A triangular folding web portion (54) is formed between the first side sheet (52) and the second side sheet (53), so that the first side sheets (52) and the second side sheets (53) can be folded and stood up relative to the bottom sheet (51), and the folding web portions (54) are folded and overlapped on the outer surface of the first side sheet (52) or the second side sheet (53) to form a storage space with an opening facing upward. (55), and the edge of the first side sheet (52) is different from the edge of the bottom sheet (51) and extends outwards to have a first upper lip sheet (561) and a first lower lip sheet (565) that can be folded up and down to overlap horizontally, and the edge of the second side sheet (53) is different from the edge of the bottom sheet (51) and extends outwards to have a second upper lip sheet (571) and a first lower lip sheet (565) that can be folded up and down to overlap horizontally. The two lower lip pieces (575) are used to increase the support strength of the horizontal lip, so that the adhesive film can be flatly adhered and fixed, so that the periphery of the double-lipped paper box can have a horizontal lip structure for adhesive film to adhere; the characteristics of the present invention are that the two ends of the first upper lip piece (561) connected to the first side pieces (52) respectively have extension pieces (562) that exceed the length of the first side pieces (52), and the two ends are The extension piece (562) has a butt-jointed oblique edge (563) that converges toward the first side piece (52), and the two ends of the first lower lip piece (565) connected to the first upper lip piece (561) respectively have a first downward convex covering piece (566) of the same length as the corresponding extension piece (562), and the two ends of the second upper lip piece (571) connected to the second side pieces (53) also respectively have The extension piece (572) is longer than the second side piece (53), and the extension pieces (572) at both ends have abutting oblique edges (573) that converge toward the second side piece (53), so that when the box is folded, the abutting oblique edges (563, 573) of the adjacent first upper lip piece (561) and the second upper lip piece (571) can be abutted and abutted, and the abutting oblique edges (563, 573) of the second upper lip piece (571) can be abutted and abutted. The two ends of the connected second lower lip (575) are respectively provided with a second lower convex covering piece (576) of the same length as the corresponding extension piece (572). The first and second lower convex covering pieces (566, 576) can be selected from arc-shaped pieces; thus, when the box is folded, the first lower convex covering pieces (566) of the first lower lip (565) can be overlapped and attached to the first upper lip (561) and the second upper The bottom surface of the joint of the beveled edge (563, 573) of the lip piece (571) is connected, and the second lower convex cover piece (576) of the second lower lip piece (575) is sequentially overlapped and fixed to the bottom surface of the first lower convex cover piece (566) of the first lower lip piece (565) (as shown in Figures 7 and 8), which can greatly improve its structural strength and achieve the purpose of corner leakage prevention, thereby avoiding leakage.

In this way, a paper box structure with good corner leakage prevention effect and high bonding strength is formed.

As can be seen from the above structure and operation description, the butt-jointed oblique edges (563, 573) for corner butt-jointing in the paper box structure of the present invention are respectively formed on the adjacent first upper lip piece (561) and the second upper lip piece (571), so that when the relative bends are horizontally overlapped, they can be kept level without any height difference, so that the top surface of the horizontal lip of the paper box structure of the present invention can be kept flat, so that the adhesive film can be pasted without any height difference. The poor adhesion affects the sealing effect during bonding. Furthermore, since the first and second lower convex covering sheets (566, 576) of the first and second lower lip sheets (565, 575) can be sequentially overlapped and adhered to the joint bottom surface of the butt-jointed bevel edges (563, 573) and the bottom surface of the first lower convex covering sheet (566), it can increase the bonding area and overlapping area, which can enhance its bonding effect and bonding strength, and effectively improve its practicality.

Furthermore, the characteristic structure of the present invention can be applied to typical paper boxes with lids or paper boxes with double folded lips.

In summary, it can be understood that this invention is an invention with excellent creativity. In addition to effectively solving the problems faced by practitioners, it also greatly improves the efficacy. In the same technical field, there is no same or similar product creation or public use. At the same time, it has improved efficacy. Therefore, this invention has met the requirements of invention patents regarding "novelty" and "progressiveness", and an invention patent application is filed in accordance with the law.

50: Cardboard

51: Negatives

52: First side stand

53: Second side stand

54: Folded webbed part

55: Storage space

561: First upper lip piece

562: Extension piece

563: Butt bevel edge

565: First lower lip piece

566: First convex cover

571: Second upper lip piece

572: Extension piece

573: Butt bevel edge

575: Second lower lip piece

576: Second lower convex cover

Claims (2)

A paper box structure is formed by a sheet of paperboard, wherein the paperboard is formed with a plurality of pre-stressed fold lines to form a bottom sheet located in the center, and two first side panels and two second side panels of equal height and capable of being folded upward are respectively extended from two opposite sides of the periphery of the bottom sheet, and a triangular folding web is respectively formed between the adjacent first side panels and the adjacent second side panels, so that the first side panels and the adjacent The second side piece can utilize the folded webs to bend relative to each other to form an upwardly opening accommodation space, and the first side piece extends outwards from the edge of the bottom piece to have a first upper lip piece and a first lower lip piece that can be folded relative to each other and overlapped horizontally, and the second side piece extends outwards from the edge of the bottom piece to have a second upper lip piece and a second lower lip piece that can be folded relative to each other and overlapped horizontally, and its characteristics are; The two ends of the first upper lip piece connected to the first side pieces have extension pieces that exceed the length of the first side pieces, and the extension pieces at both ends have butt-joint oblique edges that converge toward the first side pieces. The two ends of the first lower lip piece connected to the first upper lip piece have first lower convex covering pieces that are equal in length to the corresponding extension pieces. As for the two ends of the second upper lip piece connected to the second side pieces, they also have extension pieces that exceed the length of the second side pieces, and the extension pieces at both ends have butt-joint oblique edges that converge toward the second side pieces. This allows the adjacent first upper lip piece and the second upper lip piece to butt against each other at the butting oblique edges, and the first lower convex cover piece of the first lower lip piece is overlapped and fixed to the bottom surface of the seam of the butting oblique edges, and the second lower convex cover piece of the second lower lip piece is overlapped and fixed to the bottom surface of the first lower convex cover piece. The paper box structure as described in claim 1, wherein the first and second lower convex covering sheets can be selected from arc-shaped sheets.

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