Paper box

Abstract

To provide a paper box body in which a lid body can be stably attached to a box body and which can be opened without any trouble. [Solution] A paper box (1) consisting of a box body (2) that is open at the top and a lid (3) that is fitted onto the box body (2), the lid (3) has a locking ridge (7) that protrudes inward along the inner edge (4) of the side (5) of the lid, and a locking structure that locks the locking ridge (7) along the outer edge (9) of the box body (2), and when the lid (3) is fitted onto the box body (2), the locking ridge (7) locks into the locking structure, thereby fixing the lid (3).

Description

[Technical Field]

[0001] This invention relates to a paper box for storing food and the like.

[0002] For example, plastic containers are widely used for storing food, but they are not environmentally friendly. While using a cardboard box is an option, the lid can easily rattle or come off, making it difficult to securely attach. Therefore, securing the lid with tape or other fasteners is considered, but this is time-consuming and requires a lot of effort to open. Summary of the Invention [Problem to be solved by the invention]

[0003] The object of this invention is to provide a paper box or the like in which the lid can be stably attached to the box body and which can be opened without any problems.

[0004] This invention provides a paper box comprising a box body that is open at the top and a lid that is fitted onto the outside of the box body, wherein a locking ridge that protrudes inward is provided along the inner edge of the side of the lid, and a locking structure that locks the locking ridge along the outer edge of the top of the box body, and when the lid is fitted onto the outside of the box body, the locking ridge locks into the locking structure, thereby securing the lid.

[0005] The locked structure is formed, for example, by an upper portion of the box body that opens outward.

[0006] The locking projections of the lid are provided continuously and integrally in a bent form on the inner edge, and are therefore firmly provided without using a separate member. [Effects of the Invention]

[0007] According to this invention, a paper box body for storing food, etc., can be obtained that is suitable from the viewpoint of environmental protection. [Brief explanation of the drawings]

[0008] [Figure 1] A perspective view of the paper box of this invention. [Figure 2] A perspective view of the inside of the lid of the paper box of this invention. [Figure 3] A plan view of the lid of the paper box of this invention before assembly. [Figure 4] A simplified cross-sectional view showing the state in which the lid is attached to the box body of the paper box of this invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Figure 1 is an external perspective view of a cardboard box (paper box), and cardboard box 1 consists of a cardboard box body 2 that is open at the top and a cardboard lid body 3 that is fitted onto the outside of box body 2.

[0010] The top 9 of the box body 2 is formed to open outward, and as will be explained later, this portion serves as a locking structure to which the locking ridges 7 of the lid 3 are locked. The box body 2 also has a plastic film layer 11 on the entire inner surface, making it suitable for storing food.

[0011] As shown in Fig. 2, the cover 3 is provided with locking ridges 7 that protrude inward in a folded state along the inner edges 4 of the pair of side portions 5. Fig. 3 is a plan view of the backing 8 before the cover 3 is assembled. Three folding lines 10 are provided in parallel along the longitudinal direction of the backing 8 on the inner surfaces of the pair of side portions 5, and the locking ridges 7 are formed by folding inward sequentially at the folding lines 10. The leading edges of the side portions 5 are fixed to the inner surfaces of the side portions 5 with an adhesive or the like.

[0012] Figure 4 is a cross-sectional view showing the lid 3 attached to the box body 2 of the cardboard box 1. The lid 3 is attached to the box body 2 with each of the locking ridges 7 locking along the outer edge 12 of the top 9 of the box body 2. This prevents the lid 3 from coming off upward, ensuring a stable attachment. The locking ridges 7 are each locked to the outer edge 12 of the top 9 of the box body 2 because the top 9 of the box body 2 has an outward-opening locking structure. The lid 3 is strong and resistant to deformation, and its stable attachment provides optimal protection for the contents inside. The lid 3 is attached to and detached from the box body 2 by slightly opening and closing each of the side sections 5 due to the elasticity of the cardboard. [Explanation of symbols]

[0013] 1 Cardboard box (box) 2 boxes 3 Lid 4 Common-law marriage 5 Side 7 Locking protrusion 9 Upper part (locked structure part) 12 outer edge

Claims

1. A paper box body consisting of a box body that opens upward and a lid body that is fitted onto the outside of the box body, A locking protrusion is provided along the inner edge of the side of the lid body so as to protrude inward, and a locking structure is provided to lock the locking protrusion along the outer edge of the upper part of the box body, A box body characterized in that, when the lid body is externally fitted onto the box body, the locking ridges lock onto the locking structure portion, thereby fixing the lid body.

2. 2. The paper box according to claim 1, wherein the engaging structure is formed by an outwardly opening upper portion of the box body.

3. 2. The paper box according to claim 1, wherein the locking ridges are provided continuously and integrally on the inner edge in a bent shape.

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