CN114403572A

CN114403572A - Environmental protection paper cutlery box

Info

Publication number: CN114403572A
Application number: CN202210160644.1A
Authority: CN
Inventors: 陆孝庭; 陆致虞
Original assignee: Ruili Biotechnology Hangzhou Co ltd
Current assignee: Ruili Biotechnology Hangzhou Co ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-04-29

Abstract

An environment-friendly paper lunch box comprises a paper box body and a box cover buckled with the box body, wherein the upper edge of the paper box body is provided with an outward turned edge, the cross section of the turned edge is in a shape of a major arc, and the middle position of the turned edge is an arc top protruding outwards approximately at the height; the bottom surface of the paper box body is concave inwards to form a step surface, and the lower edge of the paper box body is used as a supporting leg to be supported on the paper lunch boxes stacked below; the box cover comprises a paperboard, the shape of the paperboard is matched with the shape of an opening at the upper end of the box body, the outer edge of the paperboard is connected with a frame which is formed by injection molding of biodegradable materials, the frame is provided with a side wall which is vertical to the paperboard and a top surface which is parallel to the paperboard, the inner side of the side wall is provided with an inclined plane and a clamping rib, and the top surface is provided with a table top and a limiting step; when the paper box body is buckled with the box cover, the clamping ribs and the inclined surface press the arc top of the turned edge to elastically deform and be embedded into the turned edge. The invention has good sealing performance and is suitable for placing food with soup; meanwhile, the paper lunch boxes are prevented from being damaged by the extrusion box cover, and the paper lunch boxes can be conveniently stacked.

Description

Environmental protection paper cutlery box

Technical Field

The invention relates to the technical field of disposable lunch boxes, in particular to an environment-friendly paper lunch box.

Background

The disposable lunch box is the main container for taking-out box lunch. Previous cutlery boxes were heavily plastic. Plastic meal boxes are low cost and have been widely used for many years. But the water tightness of plastic cutlery boxes has not been solved. The box body and the box cover made of plastic materials are both hard materials, and a structure with good water tightness is difficult to form between the box body and the box cover.

In recent years, plastic pollution is becoming more serious, plastic restrictions are promulgated continuously in various places, and disposable plastic products are restricted or prohibited to be used in a limited period. Although the existing fully biodegradable materials (such as PLA) have begun to gradually replace disposable PP plastic containers in a small amount, due to the high price of the materials and the difficulty of the processing and forming process, the materials are very difficult to be put on the market, especially the materials are not cost-effective.

The paper meal box has the following problems: (1) the existing paper lunch box mainly comprises a paper box body and a box cover, wherein the upper end of the paper box body is provided with an outward turned edge, the cross section of the turned edge is in a shape of a major arc, and the middle position of the turned edge is approximately the arc top which protrudes outwards; the edge of lid is equipped with the vertically lateral wall, and the turn-up joint driving fit on inboard and the box body of lateral wall is followed sometimes can be at the inboard small card muscle of being of lateral wall, colludes the lock that realizes lid and box body at the lower edge of turn-up through the card muscle card. Because the contact surface of the convex strip and the turned edge is small, the clamping structure does not have good tightness, the soup is easy to leak by slightly shaking under the state that the box body is filled with the soup, and the clamping structure is particularly obvious on a noncircular lunch box. (2) In daily takeaway, a plurality of paper lunch boxes need to be stacked together for convenient carrying. The plastic upper cover or the paper upper cover adopted by the common paper lunch box is soft, and when the food contained in the paper lunch box is heavy, the upper cover of the lower lunch box is damaged because the upper cover cannot bear the weight of the upper stacked lunch box; and the utility model is easy to slip and turn on one's side during the takeaway transportation process.

Disclosure of Invention

In order to overcome the problems, the invention provides an environment-friendly paper lunch box.

The technical scheme adopted by the invention is as follows: an environment-friendly paper lunch box comprises a paper box body and a box cover buckled with the box body, wherein the upper edge of the paper box body is provided with an outward turned edge, the cross section of the turned edge is in a shape of a major arc, and the middle position of the turned edge is an arc top which protrudes outwards approximately at the height; the bottom surface of the paper box body is concave inwards to form a step surface, and the lower edge of the paper box body is used as a supporting leg to be supported on the paper lunch boxes stacked below;

the box cover comprises a paperboard and a frame, the outer edge of the paperboard is connected with the frame which is made of biodegradable materials through injection molding, the frame is provided with a side wall perpendicular to the paperboard and a top surface parallel to the paperboard, and the inner side of the side wall of the frame is provided with an inclined surface which is raised relative to the side wall from top to bottom; the bottom of the inclined plane is connected with a raised clamping rib, the clamping rib protrudes inwards on the basis of the side wall of the frame, and the height of the top of the clamping rib is higher than that of the bottom of the inclined plane; the distance between the lower part of the inclined plane and the side wall of the paper box body is smaller than the distance between the arc top and the side wall of the paper box body, the distance between the end part of the clamping rib and the side wall of the paper box body is slightly smaller than the distance between the arc top and the side wall of the paper box body, the distance between the top of the bulge of the clamping rib and the paperboard is larger than 1/2 of the height of the turned edge and smaller than 9/10 of the height of the turned edge, and the clamping rib and the inclined plane press the arc top of the turned edge to elastically deform and be embedded into the turned edge in the buckling process;

the inner side of the top surface of the frame extends inwards to form a table board, the table board is located below the supporting legs of the paper box body, a convex limiting step is arranged on the table board, and the limiting step surrounds the paper box body and limits the horizontal displacement of the paper box body.

Preferably, the distance between the top of the rib projection and the paperboard is greater than 1/2 and less than 4/5 of the height of the rolled edge.

Further, the inner angle of the frame is circular arc, and the horizontal length between two endpoints of the circular arc is greater than, equal to or less than the vertical height between two endpoints of the circular arc.

Further, the outer wall of the side wall of the frame is an inclined plane, and the inclined direction of the inclined plane is inclined outwards relative to the vertical direction from top to bottom.

Further, the inner diameter of the side wall of the frame, which is positioned below the clamping rib, is larger than or equal to the outer diameter of the upper end of the paper box body.

Furthermore, the inner surface of the paper box body and the lower surface of the paperboard are both provided with a full biodegradable spray film or a full biodegradable spray film.

Furthermore, a handle convenient for taking the box cover is arranged on the frame.

Furthermore, the top surface of the frame is provided with a plurality of through holes which are distributed at intervals continuously, and the hole patterns of the through holes are triangular, circular, square, rectangular or polygonal.

The invention has the beneficial effects that:

(1) the double-seal structure is provided with double seals, the inclined surface compresses the turned edge and generates elastic extrusion deformation with the contact surface of the turned edge, so that the double seals are realized; the clamping ribs are extruded and partially embedded into the turned edges, double sealing is realized, and the box cover and the paper box body are prevented from falling off.

(2) The inner angle of the frame is arc-shaped, stress is dispersed, and stress concentration is avoided, so that the risk of frame fracture caused by injection molding of the biodegradable material is reduced. The horizontal length between two end points of the circular arc shape is greater than, equal to or less than the vertical height between two end points of the circular arc shape. The inner angle shape of the frame is matched with the radian of the turned edge as much as possible, so that the strength of the frame is increased, and the leakage-proof performance is further improved.

(3) Through setting up mesa and spacing step on the frame, when having avoided a plurality of paper cutlery boxes to stack, the unable weight that supports paper cutlery box in the paper lid takes place the condition of damaging, has also avoided the in-process of transporting simultaneously, the condition of turning on one's side that skids of a plurality of paper cutlery boxes.

(4) The outer wall of the side wall of the frame can be vertical or inclined inwards, but preferably inclined outwards, so that the thickness and the strength of the frame made of the biodegradable material can be increased.

(5) The frame, the biodegradable film and the spray film are all made of biodegradable material (PLA material, PBS material or PFM.BSR material), and the biodegradable material, the paper lunch box and the paperboard can be degraded in nature and respond to environmental protection policies.

(6) The biodegradable material is expensive, and the fully biodegradable frame is only injection molded on the paperboard, so that the cost is low, and the market competitiveness is improved.

(7) The frame is provided with a plurality of through holes, so that the biodegradable material can be saved, and the appearance is attractive.

Drawings

Fig. 1 is a top view of the lid of the present invention.

Fig. 2 is a sectional view taken along the line a-a in fig. 1.

Fig. 3 is a sectional view taken along line B-B in fig. 1.

FIG. 4 is a schematic view of the assembly of the paper box body and lid of the present invention.

Fig. 5 is a partially enlarged view at C in fig. 4.

Fig. 6 is a schematic view of the structure of the bead.

Fig. 7 is a schematic structural diagram of a frame.

Fig. 8 is a perspective view of the cap of the present invention.

FIG. 9 is an angled perspective view of the paper cartridge body of the present invention.

FIG. 10 is a perspective view of another angle of the paper cartridge of the present invention.

Description of reference numerals: 1. a box cover; 11. a paperboard; 12. a frame; 13. a table top; 14. a limiting step; 15. clamping ribs; 16. a handle; 17. round corners; 18. an inclined surface; 2. a paper box body; 21. curling; 22. the lower edge of the paper box body.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to the attached drawings, the environment-friendly paper lunch box comprises a paper box body 2 and a box cover 1 buckled with the paper box body 2, wherein an outward turned curled edge 21 is arranged on the upper edge of the paper box body 2, the cross section of the curled edge 21 is in a shape of a major arc, and the middle position of the height of the curled edge is an arc top protruding outwards; the bottom surface of the paper box body 2 is concave inwards to form a step surface, and the lower edge 22 of the paper box body 2 is used as a supporting leg to be supported on paper lunch boxes stacked below;

the box cover 1 comprises a paperboard 11, the shape of the paperboard 11 is matched with the shape of an opening at the upper end of the paper box body 2, the outer edge of the paperboard 11 is connected with a frame 12 formed by injection molding of a biodegradable material, the frame 12 is provided with a side wall perpendicular to the paperboard 11 and a top surface parallel to the paperboard 11, and the inner side of the side wall of the frame is provided with an inclined surface 18 which is raised relative to the side wall from top to bottom; the bottom of the inclined surface 18 is connected with a raised clamping rib 15, the clamping rib 15 protrudes inwards based on the side wall of the frame 12, and the top of the clamping rib 15 is higher than the height of the bottom of the inclined surface 18; the distance between the lower part of the inclined surface 18 and the side wall of the paper box body 2 is smaller than the distance between the arc top and the side wall of the paper box body 2, the distance between the end part of the clamping rib 15 and the side wall of the paper box body 2 is smaller than the distance between the arc top and the side wall of the paper box body 2, and the clamping rib and the inclined surface press the arc top of the curled edge to elastically deform and be embedded into the curled edge in the buckling process; the distance between the top of the rib protrusion and the bottom of the paperboard 11 is greater than 1/2 of the height of the turned edge and less than 9/10 of the height of the turned edge, when the paper box body 2 is buckled with the box cover 1, the rib 15 is extruded and partially embedded into the turned edge 21; preferably, the distance between the top of the rib projection and the paperboard is greater than 1/2 and less than 4/5 of the height of the rolled edge. Referring to fig. 4, P1 is 1/2P0, P2 is 9/10P0, P0 is the height of the bead, P1 is at 1/2 the height of the bead 21, and P2 is at 9/10 the height of the bead 21. Preferably, P2 is at 4/5 of the height of bead 21.

In this embodiment, the interior angle of frame is circular arc, and dispersed stress avoids stress concentration to reduce the cracked risk of frame that biodegradable materials moulded plastics. The horizontal length D between the two ends of the circular arc is greater than, equal to or less than the vertical height H between the two ends of the circular arc, and is matched with the radian of the turned edge 21 as much as possible, so that the leakage-proof performance is further improved.

In this embodiment, the outer wall of the side wall of the frame 12 is an inclined surface, and the inclined direction of the inclined surface is inclined outward from top to bottom relative to the vertical direction, so that the thickness and strength of the frame 12 can be increased.

In this embodiment, the inner diameter of the frame 12 below the rib 15 is greater than or equal to the outer diameter of the upper end of the box body, which facilitates the box cover to be placed on the top of the paper box body.

In this embodiment, the inner surface of the paper box body 2 and the lower surface of the paper board 11 are both provided with a biodegradable spray film or a biodegradable spray film. The biodegradable material frame, the biodegradable laminated film and the spray film are all made of biodegradable material (PLA material, PBS material or PFM.

In this embodiment, the frame is connected with handle 16, and when lid 1 and paper box body 2 lock tension, use handle 16 just can be light open the lid.

In this embodiment, the top surface of the frame is provided with a plurality of through holes distributed at intervals, and the hole patterns of the through holes are triangular, circular, square, rectangular, polygonal or any shape. Thus saving the biodegradable material and having beautiful appearance.

The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but rather by the equivalents thereof as may occur to those skilled in the art upon consideration of the present inventive concept.

Claims

1. The utility model provides an environmental protection paper cutlery box, includes the paper box body and with the lid of the mutual lock of box body, its characterized in that: the upper edge of the paper box body is provided with an outward turned edge, the cross section of the turned edge is in a preferred arc shape, and the middle position of the paper box body is approximately the arc top which protrudes outwards; the bottom surface of the paper box body is concave inwards to form a step surface, and the lower edge of the paper box body is used as a supporting leg to be supported on the paper lunch boxes stacked below;

2. An environmentally friendly paper lunch box as claimed in claim 1, wherein: the distance between the top of the rib protrusion and the paperboard is greater than 1/2 and less than 4/5 of the height of the edge curl.

3. An environmentally friendly paper lunch box as claimed in claim 1, wherein: the inner angle of the frame is arc-shaped, and the horizontal length between two end points of the arc-shaped is greater than, equal to or less than the vertical height between the two end points of the arc-shaped.

4. An environmentally friendly paper lunch box as claimed in claim 1, wherein: the outer wall of the side wall of the frame is an inclined plane, and the inclined direction of the inclined plane is inclined outwards relative to the vertical direction from top to bottom.

5. An environmentally friendly paper lunch box as claimed in claim 1, wherein: the inner diameter of the side wall of the frame below the clamping rib is larger than or equal to the outer diameter of the upper end of the paper box body.

6. An environmentally friendly paper lunch box as claimed in claim 1, wherein: and the inner surface of the paper box body and the lower surface of the paperboard are both provided with a full biodegradable spray film or a full biodegradable spray film.

7. An environmentally friendly paper lunch box as claimed in claim 1, wherein: the frame is provided with a handle which is convenient for taking the box cover.

8. An environmentally friendly paper lunch box as claimed in claim 1, wherein: the top surface of the frame is provided with a plurality of continuous through holes distributed at intervals, and the hole patterns of the through holes are triangular, circular, square, rectangular or polygonal.