TWI900208B - Insulated paper box structure - Google Patents

Abstract

The invention includes an inner box body folded from paper and having an internal storage space; the paper is provided with two protective layers on both surfaces and includes a bottom outer sheet, two end wall outer sheets that can be folded to connect the two ends of the bottom outer sheet respectively, and two end wall inner sheets that can be folded to connect the two end wall outer sheets respectively; the end wall inner sheet and the end wall outer sheet that are folded relative to each other form an end wall with four protective layers, and a space is formed between the end wall inner sheet and the end wall outer sheet to accommodate air, so that the invention can produce a heat-insulating effect by using air with poor thermal conductivity and multiple protective layers, which can solve the problem of poor heat insulation and cold preservation effects of existing paper boxes, and provide a heat-insulating paper box structure that can enhance the heat insulation function and properly preserve the contents.

Description

Insulated paper box structure

This invention relates to a container, particularly an insulating paper box structure that is structurally strong, has thermal insulation properties, and can reduce production costs.

With environmental awareness gaining increasing attention, not only is product packaging becoming increasingly streamlined, but easily recyclable cartons are also being used to package products.

Conventional paper boxes are made from folded paper, with a protective layer coated on one side with a protective oil or polypropylene film. After the paper is folded, the conventional paper box forms a single-layer peripheral wall, with the aforementioned protective layer located on the outer surface of the box, thereby providing protection from moisture and water spills.

However, because existing paper boxes are made by folding paper, the protective layer is located on the outer surface of the box. Therefore, the interior of the box is not suitable for products with high moisture content, such as cakes and lettuce. Furthermore, the single-layer wall of existing paper boxes does not easily provide heat insulation or cold retention, making it easy for products that require low temperature storage to spoil inside existing boxes.

Furthermore, due to their poor insulation and cooling properties, existing paper boxes often require multiple cutting and gluing steps to create space for the coolant after folding in order to store products stored at low temperatures. This increases the production cost of these boxes.

To address the aforementioned issues with existing paper boxes, this invention provides a thermally insulating paper box structure that improves the box's heat and cold insulation properties while reducing manufacturing costs.

This invention solves a technical problem by proposing a heat-insulating paper box structure comprising: An inner box body, folded from a paper material, forming an internal storage space; the paper material comprises two surfaces facing opposite directions, two protective layers disposed on the two surfaces of the paper material, and a bottom outer sheet, two end wall outer sheets, two end wall inner sheets, at least one pair of end wall positioning openings, at least one pair of end wall positioning protrusions, a side wall front sheet, a side wall rear sheet, two connecting sheets, and two wing sheets; the bottom outer sheet The sheet is rectangular and includes two opposite ends, and a front side and a rear side. The two end wall outer sheets can be folded to connect the two opposite ends of the bottom outer sheet respectively, and the bottom outer sheet is located between the two end wall outer sheets. The two end wall inner sheets can be folded to connect the two end wall outer sheets respectively, and each end wall outer sheet is located between the connected end wall inner sheet and the bottom outer sheet. The connected two end wall inner sheets and the two end wall outer sheets can form two sockets respectively. The two insertion openings are located on the same side as the front side of the outer sheet of the bottom of the box; the two end wall positioning openings of each pair of end wall positioning openings pass through the opposite ends of the outer sheet of the bottom of the box and are respectively adjacent to the two end wall outer sheets; the two end wall positioning convex portions of each pair of end wall positioning protrusions are respectively protruded from the two end wall inner sheets, and the two end wall positioning convex portions of each pair of end wall positioning protrusions can be respectively inserted into the two end wall positioning openings of the corresponding one of the pair of end wall positioning openings; the front sheet of the side wall can be folded to connect to the outer sheet of the bottom of the box The front side of the box; the side wall rear sheet can be folded to connect to the rear side of the bottom outer sheet, and the bottom outer sheet is located between the side wall front sheet and the side wall rear sheet; the two connecting pieces can be folded to connect the two end wall outer sheets and the side wall rear sheet respectively, and each connecting piece has a fold extending obliquely toward the bottom outer sheet in the middle; the two wings can be folded to connect to the opposite ends of the side wall front sheet respectively, and the side wall front sheet is located between the two wings; the two wings can be inserted into the two sockets respectively.

The thermal insulation paper box structure includes a paper material including an inner sidewall sheet; the inner sidewall sheet can be folded and connected to the rear sidewall sheet, so that the rear sidewall sheet is located between the bottom outer sheet and the inner sidewall sheet.

The thermally insulated paper box structure includes at least one sidewall positioning opening and at least one sidewall positioning protrusion; each sidewall positioning opening penetrates the rear side of the outer sheet of the box bottom and is adjacent to the rear sidewall sheet; each sidewall positioning protrusion protrudes from the inner sidewall sheet and can be inserted into a corresponding sidewall positioning opening.

The thermal insulation paper box structure, wherein the paper material includes a bottom inner sheet, the bottom inner sheet can be folded to connect to the side wall inner sheet, and the side wall inner sheet is located between the bottom inner sheet and the side wall rear sheet.

In the aforementioned thermal insulation paper box structure, each connecting piece is provided with a beveled edge, and the beveled edge of the connecting piece extends obliquely from the first box body side sheet to which it is connected to the side wall rear sheet.

In the aforementioned thermal insulation paper box structure, each connecting piece is provided with a notch, and the notch of the connecting piece is recessed in the oblique edge of the connecting piece.

In the aforementioned thermal insulation paper box structure, each connecting piece is provided with a notch, the notch being located in the middle of the connecting piece, and the fold of the connecting piece extending from the notch to the notch, and then extending obliquely from the notch to the outer sheet of the box bottom.

In the aforementioned heat-insulating paper box structure, each of the paper materials further includes two supporting plates, which can be folded and connected to the two end wall outer sheets respectively and can be inserted into the two sockets respectively.

The thermal insulation box structure includes two thermal insulation sheets. The two thermal insulation sheets can be inserted into the two sockets, respectively. One thermal insulation sheet is accommodated between one end wall inner sheet and one end wall outer sheet, and the other thermal insulation sheet is accommodated between the other end wall inner sheet and the other end wall outer sheet.

The technical means of this invention achieve enhanced performance in that: the insulating paper box structure of this invention has protective layers on both surfaces of the paper material and includes inner and outer end wall sheets that can fold relative to each other. The inner and outer end wall sheets fold relative to each other to form end walls with high structural strength and four protective layers. The space between the inner and outer end wall sheets is used to accommodate air, creating an insulating effect by using air with poor thermal conductivity. Combined with the protective layer, this invention enhances its heat insulation, cold preservation, and humidity maintenance functions, allowing it to accommodate products that are rich in moisture and require low-temperature storage.

10: Inner box

10A: Paper

10B: Protective layer

11: Box bottom outer sheet

12: End wall outer sheet

13: End wall inner sheet

14: End wall positioning hole

15: End wall positioning convex part

16: Socket

17: Sidewall front sheet

18: Sidewall rear sheet

19: Side wall inner sheet

21: Side wall positioning hole

22: Box bottom inner sheet

23: Side wall positioning convex part

24: Connector

241: Beveled Edge

242: Gap

243:Incision

244: Crease

25: Wings

26: Support plate

30: Outer box

40: Platter

41: Negatives

42: Handle

50: Heat insulation sheet

S: space

Figure 1 is a schematic three-dimensional diagram of the appearance of a preferred embodiment of this invention.

Figure 2 is a schematic diagram of the exploded components of a preferred embodiment of this invention.

Figure 3 is a partially expanded schematic diagram of a preferred embodiment of this invention.

Figure 4 is a schematic diagram of the unfolded inner box of a preferred embodiment of this invention.

Figure 5 is a schematic diagram of the unfolded inner box of a preferred embodiment of this invention.

Figure 6 is a schematic diagram of the unfolded inner box of a preferred embodiment of this invention.

Figure 7 is a partially enlarged cross-sectional schematic diagram of the end wall of a preferred embodiment of the present invention.

Figure 8 is a three-dimensional schematic diagram of the installation of a heat insulation sheet according to a preferred embodiment of this invention.

Figure 9 is a further enlarged schematic cross-sectional view of the end wall of a preferred embodiment of the present invention.

To provide a detailed understanding of the technical features and practical effects of this invention and to facilitate its implementation according to the invention, a preferred embodiment is further described below, as shown in the accompanying drawings. As shown in Figures 1 and 2, this preferred embodiment includes an inner box 10, an outer box 30, and a serving tray 40 made of paper.

As shown in Figures 1 to 3, in a preferred embodiment of the present invention, the inner box body 10 is rectangular and includes two opposing end walls, two opposing side walls, a receiving space surrounded by the end walls and the side walls, and an opening at the top of the inner box body 10.

As shown in Figures 2, 7, and 9, the inner box 10 is folded from a paper material 10A. The paper material 10A includes two surfaces facing opposite directions, and two protective layers 10B disposed on each surface of the paper material 10A. Each protective layer 10B can be formed by coating the surface with a protective oil or a polypropylene film. The material of the protective layer 10B is not particularly limited, as long as it prevents the surface from absorbing moisture and provides a water-repellent effect.

As shown in Figures 2 to 7, the paper material 10A includes a bottom outer sheet 11; two end wall outer sheets 12 for folding to form the end walls, two end wall inner sheets 13, a pair of end wall positioning openings, and a pair of end wall positioning protrusions; a side wall front sheet 17 for folding to form the two side walls, a side wall rear sheet 18, a side wall inner sheet 19, and a side wall positioning opening 21; and a bottom inner sheet 22, a side wall positioning protrusion 23, two connecting pieces 24, and two flaps 25.

As shown in Figures 2 to 7, the bottom outer sheet 11 is rectangular and has two opposing ends, as well as a front and a rear side. The two end wall outer sheets 12 are foldably connected to the opposing ends of the bottom outer sheet 11, with the bottom outer sheet 11 positioned between the two end wall outer sheets 12. The two end wall inner sheets 13 are foldably connected to the two end wall outer sheets 12, with each end wall outer sheet 12 positioned between the connected end wall inner sheet 13 and the bottom outer sheet 11.

As shown in Figures 2 to 7, the two end wall positioning openings 14 of the pair of end wall positioning openings pass through the opposite ends of the box bottom outer sheet 11 and are respectively adjacent to the two end wall outer sheets 12. The two end wall positioning protrusions 15 of the pair of end wall positioning protrusions are respectively protruded from the two end wall inner sheets 13. When the two end wall inner sheets 13 are folded relative to the two end wall outer sheets 12, the two end wall positioning protrusions 15 can be inserted into the two end wall positioning openings 14, respectively, maintaining the two end wall inner sheets 13 on the inner sides of the two end wall outer sheets 12. At this time, a space S is formed between each end wall inner sheet 13 and the adjacent end wall outer sheet 12, and a socket 16 is formed, connecting to the space S and facing the front of the inner box body 10. The two sockets 16 formed by the folding of the two end wall inner sheets 13 are located on the same side as the front side of the bottom outer sheet 11.

In practice, as long as the paper material 10A is provided with at least one pair of end wall positioning openings and at least one pair of end wall positioning protrusions, the two end wall inner sheets 13 are respectively secured to the inner sides of the two end wall outer sheets 12 by relative engagement. This invention does not impose any specific restrictions on the number of end wall positioning openings 14 and end wall positioning protrusions 15.

As shown in Figures 2 to 7, the side wall front sheet 17 can be folded and connected to the front side of the bottom outer sheet 11; the side wall rear sheet 18 can be folded and connected to the rear side of the bottom outer sheet 11, and the bottom outer sheet 11 is located between the side wall front sheet 17 and the side wall rear sheet 18. The side wall inner sheet 19 can be folded and connected to the side wall rear sheet 18, so that the side wall rear sheet 18 is located between the bottom outer sheet 11 and the side wall inner sheet 19, and a space (not shown) can be formed between the side wall inner sheet 19 and the side wall rear sheet 18. The side wall positioning opening 21 passes through the rear side of the bottom outer sheet 11 and is adjacent to the side wall rear sheet 18.

As shown in Figures 2 to 7, the bottom inner sheet 22 can be folded to connect to the side wall inner sheet 19. The side wall inner sheet 19 is positioned between the bottom inner sheet 22 and the side wall rear sheet 18. After the side wall inner sheet 19 and the bottom inner sheet 22 are folded, a space (not shown) is formed between the bottom inner sheet 22 and the bottom outer sheet 11. The side wall positioning protrusion 23 is protruding from the side wall inner sheet 19 and adjacent to the bottom inner sheet 22. When the side wall inner sheet 19 is folded, the side wall positioning protrusion 23 can be inserted into the side wall positioning opening 21, maintaining the side wall inner sheet 19 inward of the side wall rear sheet 18.

Specifically, this invention cuts the bottom inner sheet 22 to form the sidewall positioning protrusions 23 that protrude from the sidewall inner sheet 19. Furthermore, as long as the paper material 10A can be held against the inner side of the sidewall rear sheet 18 by the engagement of the sidewall positioning protrusions 23 with the sidewall positioning openings 21, this invention does not impose any specific restrictions on the number of sidewall positioning protrusions 23 and sidewall positioning openings 21.

As shown in FIG. 2 to FIG. 7 , the two connecting pieces 24 can be folded to connect the two end wall outer sheets 12 and the side wall rear sheet 18 respectively. Each connecting piece 24 is provided with a beveled edge 241, a notch 242, a cutout 243, and a crease 244 to facilitate folding. The beveled edge 241 of the connecting piece 24 extends obliquely from the end wall outer sheet 12 to the side wall rear sheet 18. The notch 242 of the connecting piece 24 is recessed into the beveled edge 241 of the connecting piece 24. The cutout 243 of the connecting piece 24 is located in the middle of the connecting piece 24. The crease 244 of the connecting piece 24 is located in the middle of the connecting piece 24, extending from the notch 242 to the cutout 243 of the connecting piece 24, and then extending obliquely from the cutout 243 to the bottom outer sheet 11.

As shown in Figures 2 to 7, the two flaps 25 can be folded to connect to opposite ends of the side wall front sheet 17, with the side wall front sheet 17 located between the two flaps 25. When the side wall front sheet 17 is folded relative to the bottom outer sheet 11, the two flaps 25 can be inserted into the two sockets 16 formed by the folding of the two end wall inner sheets 13.

As shown in Figures 2 to 8, the paper material 10A of the present invention further includes two supporting pieces 26, which can be folded to connect the front sides of the two end wall outer sheets 12 respectively; the two supporting pieces 26 can be folded relative to the two end wall outer sheets 12 and can be inserted into the two sockets 16 together with the two wings 25, in addition to supporting the two end wall inner sheets 13 and the two end The two spaces S formed between the outer wall sheets 12 not only accommodate more air for thermal insulation, but also increase the fit between the two flaps 25 and the two sockets 16, reducing the amount of air contained in the two spaces S that escapes through the two sockets 16. This also prevents the two flaps 25 from loosening from the two sockets 16, allowing the side wall front sheet 17 to remain in its folded state.

As shown in Figures 1 and 2, the outer box 30 is a rectangular tube and includes two oppositely positioned inserts. The outer box 30 can be inserted into the inner box 10 through one of the inserts to provide protection for the contents contained within the inner box 10.

As shown in Figures 1 and 2, the serving tray 40 includes a base 41 and two handles 42 located at opposite ends of the base 41. The contents of the inner box 10 can be placed on the base 41, making it convenient for the user to remove the contents using the serving tray 40.

As shown in Figure 8 , each of the sockets 16 in the present invention's insulated paper box structure can be further inserted with an insulation sheet 50. Two insulation sheets 50 can be inserted through the two sockets 16 and accommodated between the two end wall inner sheets 13 and the two end wall outer sheets 12, forming two separate spaces S, providing further insulation and cooling for the present invention's insulated paper box structure. In practice, each insulation sheet 50 can be made of plastic, aluminum foil, or foam.

In this invention's insulated paper box structure, both surfaces of the paper material 10A are provided with protective layers 10B. The paper material 10A comprises an inner end wall sheet 13 and an outer end wall sheet 12 that can be folded relative to each other. These folded inner end wall sheet 13 and outer end wall sheet 12 form end walls with excellent structural strength and four protective layers 10B. The space S formed between the inner end wall sheet 13 and outer end wall sheet 12 can accommodate air, creating an insulating effect by using this air, which has poor thermal conductivity. This allows this invention to contain products that are high in moisture and require low-temperature storage. The multiple layers of protective layers 10B further enhance the insulation, moisture-proofing, and humidity-maintaining properties.

Furthermore, this invention can reduce the number of times the paper material 10A needs to be cut and the number of areas requiring adhesive bonding. Furthermore, the beveled edge 241, notch 242, cutout 243, and crease 244 provided on each connecting piece 24 make the paper material 10A easier to fold, thereby reducing the cost and time required to manufacture the insulating paper box structure.

Finally, because the inner sidewall sheet 19 can be folded relative to the rear sidewall sheet 18, simply printing a pattern or text on the same surface of the paper 10A can simultaneously display the pattern or text on both the inside and outside of the inner box 10, further reducing the production cost of this design.

The above description is merely a preferred embodiment of this invention and does not constitute any form of limitation on this invention. Any equivalent embodiment that is partially modified or altered by a person of ordinary skill in the relevant technical field without departing from the scope of the technical solution proposed by this invention and utilizing the technical content disclosed in this invention, and that does not depart from the technical solution of this invention, shall still fall within the scope of this technical solution.

10: Inner box

12: End wall outer sheet

13: End wall inner sheet

16: Socket

17: Sidewall front sheet

19: Side wall inner sheet

22: Box bottom inner sheet

25: Wings

30: Outer box

40: Platter

41: Negatives

42: Handle

Claims (10)

A heat-insulating paper box structure comprises: An inner box body folded from a paper material and defining an interior storage space; the paper material comprises two surfaces facing opposite directions, two protective layers disposed on the two surfaces of the paper material, and a bottom outer sheet, two end wall outer sheets, two end wall inner sheets, at least one pair of end wall positioning openings, at least one pair of end wall positioning protrusions, a side wall front sheet, a side wall rear sheet, two connecting sheets, and two wing sheets; The bottom outer sheet is rectangular and comprises two opposing ends, and an opposing front and rear sides; The two end wall outer sheets can be folded to connect to the opposing ends of the bottom outer sheet, respectively, with the bottom outer sheet positioned between the two end wall outer sheets; The two end wall inner sheets can be folded to connect to the two end wall outer sheets, respectively, with each end wall outer sheet being positioned between a connected end wall inner sheet and the bottom outer sheet. The two connected end wall inner sheets and the two end wall outer sheets can each form two insertion openings, which are located on the same side as the front side of the bottom outer sheet. The two end wall positioning openings of each pair of end wall positioning openings are provided through opposite ends of the bottom outer sheet and are adjacent to the two end wall outer sheets. The two end wall positioning protrusions of each pair of end wall positioning protrusions are respectively provided on the two end wall inner sheets, and the two end wall positioning protrusions of each pair of end wall positioning protrusions can be respectively inserted into the two end wall positioning openings of a corresponding one of the pair of end wall positioning openings. The side wall front sheet can be folded to connect to the front side of the bottom outer sheet. The side wall rear sheet can be folded to connect to the rear side of the bottom outer sheet, with the bottom outer sheet positioned between the side wall front sheet and the side wall rear sheet. The two connecting pieces can be folded to connect the two end wall outer sheets to the side wall rear sheet, respectively. Each connecting piece has a crease extending obliquely toward the bottom outer sheet at its center. The two wing pieces can be folded to connect to opposite ends of the side wall front sheet, with the side wall front sheet positioned between the two wing pieces. The two wing pieces can be inserted into the two sockets, respectively. As described in claim 1, the thermal insulation paper box structure, wherein the paper material includes an inner side wall sheet; the inner side wall sheet can be folded and connected to the rear side wall sheet so that the rear side wall sheet is located between the outer box bottom sheet and the inner side wall sheet. As described in claim 2, the thermal insulation paper box structure, wherein the paper material includes at least one side wall positioning opening and at least one side wall positioning protrusion; each of the side wall positioning openings passes through the rear side of the outer sheet of the box bottom, and the side wall positioning opening is adjacent to the rear sheet of the side wall; each of the side wall positioning protrusions protrudes from the inner sheet of the side wall and can be inserted into a corresponding side wall positioning opening. As described in claim 3, the thermal insulation paper box structure, wherein the paper material includes a bottom inner sheet, the bottom inner sheet can be folded to connect to the side wall inner sheet, and the side wall inner sheet is located between the bottom inner sheet and the side wall rear sheet. As described in claim 4, the heat-insulating paper box structure, wherein each of the connecting pieces is provided with a bevel, and the bevel of the connecting piece extends obliquely from the outer sheet of the end wall connected thereto to the rear sheet of the side wall. As described in claim 5, the thermal insulation paper box structure, wherein each of the connecting pieces is provided with a notch, and the notch of the connecting piece is recessed in the oblique edge of the connecting piece. As described in claim 6, the heat-insulating paper box structure, wherein each of the connecting pieces is provided with a notch, the notch of the connecting piece is located in the middle of the connecting piece, the fold of the connecting piece extends from the notch of the connecting piece to the notch of the connecting piece, and then extends obliquely from the notch to the outer sheet of the box bottom. As described in claim 2, the thermal insulation paper box structure, wherein the paper material includes a bottom inner sheet, the bottom inner sheet can be folded to connect to the side wall inner sheet, and the side wall inner sheet is located between the bottom inner sheet and the side wall rear sheet. As described in claim 1, the heat-insulating paper box structure, wherein each of the paper materials further includes two supporting plates, and the two supporting plates can be folded and connected to the two end wall outer sheets respectively and can be inserted into the two sockets respectively. The thermal insulation paper box structure as described in any one of claims 1 to 9 includes two thermal insulation sheets; the two thermal insulation sheets can be inserted into the two sockets respectively, one of the thermal insulation sheets is accommodated between an inner sheet of the end wall and an outer sheet of the end wall that are connected, and the other thermal insulation sheet is accommodated between another inner sheet of the end wall and another outer sheet of the end wall that are connected.