JPH0221379Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a lid of a paper container for storing food such as station lunches and sushi.

(Prior Art) Conventionally, as shown in FIGS. 5 and 6, a rectangular bottom plate 3, and both side plates 4 and both side walls 5 that stand up on the four peripheries of this bottom plate 3 are widened upward. The lid body 2 of the paper container main body 1 is formed so as to face each other in a tilted manner, and both side plates 7 and both side walls 8 are vertically disposed vertically from the four peripheral edges of the top plate 6.

Therefore, the gap l between the inner surfaces of the lower edges of the side plates 7 and both side walls 8 of the lid body 2 and the outer surfaces of the side plates 4 and both side walls 5 of the container body 1 becomes considerably large. The opposing dimension W ₁ between the side plates 7 is slightly larger than the outer dimension W ₂ of the upper ends of both side plates 4 of the container body 1, and the opposing dimension L ₁ between the both side walls 8 is slightly larger than the outer dimension W 2 of the upper ends of both side walls 5 of the container body 1. Since it is formed to be slightly larger than the dimension _L2 , when the lid is closed, the lid 2 is kept in the closed state only by the weight of the lid 2 itself.

(Problem to be solved by the invention) However, like the container body 1, the lid body 2 is also made of a single piece of paper, such as bleached kraft paper or carton paper, so it is lightweight and can be naturally generated from the container body 1. The container body 1 may be opened inadvertently.

Further, since the lid body 2 is lightweight, the surface pressure between the lower surface of the top plate 6 and the upper end surfaces of both side plates 4 and both side walls 5 of the container body 1 is extremely small, resulting in poor sealing performance. Therefore, there are disadvantages such as the heat of the food stored in the container body 1 tends to escape and the heat retention effect is small.

Therefore, the inclination angle θ 1 of the both side plates 7 and both side walls 8 of the lid body 2 and the both side plates 4 and both side walls 5 of the container body 1 _is
Although it is conceivable to make them face each other in a downward convergent manner at an inclination angle equal to The problem is that it is actually impossible to close the lid because it is smaller than the upper end facing dimension, and the lower end facing dimension of both side walls 8 of the lid body 2 is smaller than the upper end facing dimension of both side walls 5 of the container body 1. occurs.

However, even if the lid 2 is tilted in a convergent manner with an inclination angle equal to the inclination angle θ ₁ of the container body 1, the side plates 7 of the lid 2 can be closed to the container body 1.
The opposing dimension W ₁ between them is larger than the outer dimension of the upper end of both side plates 4 of the container body 1, and the opposing dimension between both side walls 8
If L ₁ is larger than the outer dimension L ₂ of the upper ends of both side walls 5 of the container body 1, the same drawbacks as above,
That is, there is a risk that the container body 1 may be opened inadvertently, and the sealing performance is poor, and the heat retention effect is small.

This idea was made to improve the above-mentioned conventional drawbacks and solve the problems.It is a paper container that maintains the lid properly, improves the sealing performance, and improves the heat retention effect. The purpose is to provide a lid.

(Means for Solving the Problem) It has a rectangular bottom plate, and both side plates and both side walls that stand up on the four peripheries of this bottom plate, and these both side plates and both side walls are slanted toward each other in an upwardly expanding shape. It is a lid body that is fitted onto the outside of the container body and removably covers the top opening of the container body, and includes both side plates and both side walls hanging from the four peripheries of the top plate, and these side plates are connected to each other. The side walls are convergently inclined downward at an angle of inclination equal to the angle of inclination of the side plates of the container body and the side walls, and the width of the top plate is the outer dimension of the upper end of the side plates of the container body. The length of the top plate is the same as or slightly smaller than the outer dimensions of the upper ends of both side walls of the container body, and the upper part of the square wire is left at each corner of the both side plates and both side walls. A lid for a paper container characterized by having a notch formed therein.

(Function) In this invention, notches are formed at the four corners formed by both side plates and both side walls of the lid body, so that the lower ends of the side plates and side walls serve as a fulcrum at the confluence of the notches. It can be expanded outwards.

In addition, in the lid of the present invention, both side plates and both side walls face each other in a convergent manner downward at an inclination angle equal to the inclination angle of the both side plates and both side walls of the container body, and the width dimension of the top plate is Since the external dimensions are equal to or slightly smaller than the outer dimensions of the upper ends of the side plates of the container body, the side plates and both side walls of the lid come into close contact with the side plates and both side walls of the container body when the lid is closed.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings. Fig. 1 is a perspective view showing the state in which the lid according to this invention is applied to the container body, Fig. 2 is a sectional view taken along - in Fig. 1, and Fig. 3 is a sectional view taken along the - line in Fig. 1. , in these figures, the same parts as in FIGS. 5 and 6 are given the same reference numerals, and detailed explanation thereof will be omitted.

In the figure, both side plates 7 and both side walls 8 which are vertically provided from the four peripheral edges of the top plate 6 of the lid body 2 have an inclination angle θ equal to the inclination angle θ 1 of the both side plates 4 and both side walls 5 of the container body ₁ . ₂ and are facing downward in a convergent manner. Then, the width dimension W ₁ of the top plate 6, that is, the opposing dimension W ₁ of the upper ends of both side plates 7 is formed to be equal to or slightly smaller than the outer dimension W ₂ of the upper ends of both side plates 4 of the container body 1, and the length of the top plate 6 is The length L ₁ , that is, the opposing dimension L ₁ of the upper ends of both side walls 8 is equal to or slightly smaller than the outer dimension L ₂ of the upper ends of both side walls 5 of the container body 1 .

In addition, when formed in the relationship of W ₁ <W ₂ and L ₁ <L ₂ , both side plates 4 and both side walls 5 of the container body 1 are somewhat elastically displaced inward when the container body 1 is closed.

On the other hand, a square wire 1 is attached to each of the four corners 9 formed by the side plates 7 and both side walls 8 of the lid body 2
0, a notch 11 is formed that extends from the square wire 10 to the lower side of the side plate 7 and the lower end of the side wall 8.

In the above configuration, each of the four corner portions 9 formed by the side plates 7 and both side walls 8 of the lid body 2 is expanded starting from the square wire 10 and continuing to the lower ends of the side plates 7 and side walls 8. 4, the lower ends of the side plate 7 and the side wall 8 extend outward around the confluence point P of the notch 11 as a fulcrum, as shown by virtual lines X ₁ and X ₂ in FIG. It becomes possible to expand towards

(Effect) Therefore, even if the width of the top plate of the lid body is formed to be equal to or slightly smaller than the outer dimension of the upper ends of both side walls of the container body, and the length of the top plate is made to be equal to or slightly smaller than the outer dimension of the upper ends of both side walls of the container body, Even if the size is the same or slightly smaller, the lid can be attached to the container body as shown in Figures 1 to 3, and the lid can be removed from this closed state to open the container body. can. From this,
In the closed state, there is no risk that the lid will spontaneously come off and the container body will be opened inadvertently.

In addition, when the lid is closed, both side plates of the lid are brought into close contact with both side plates of the container body, and both side walls are brought into close contact with both side walls. A large surface pressure is ensured with each upper end surface, and the outflow of warm air inside the container body and the intrusion passage of outside air are closed by the above-mentioned close contact, so the sealing performance is improved and the air is contained within the container body. It is possible to suppress the temperature drop of food that is

As explained above, according to this invention, the closed state is properly maintained, the sealing performance is improved, and the heat retention effect is improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the state in which the lid according to this invention is applied to the container body, Fig. 2 is a cross-sectional view taken along the - line in Fig. 1, and Fig. 3 is a cross-sectional view taken along the - line in Fig. 1. Fig. 4 is a partially enlarged perspective view showing the expanded state of the side plate and side wall of the lid, Fig. 5 is a sectional view of a conventional example corresponding to Fig. 2, and Fig. 6 is a conventional example corresponding to Fig. 3. FIG. 3 is an example cross-sectional view. 1... Container body, 2... Lid, 3... Bottom plate, 4
...Both sides boards, 5...Both sides walls, 6...Top plate, 7...
Both side plates, 8... Both side walls, 9... Corner part, 10
... Square wire, 11 ... Notch part.

Claims (1)

[Scope of utility model registration request] It has a rectangular bottom plate, and both side plates and both side walls standing up on the four peripheries of the bottom plate, and these both side plates and both side walls are fitted onto the outside of the container main body, which are slanted and opposed to each other in an upwardly expanding shape, It is a lid body that removably covers the upper end opening, and includes both side plates and both side walls hanging from the four peripheral edges of the top plate, and these side plates and both side walls are connected to both sides of the container body. The top plate is arranged to face each other in a downwardly convergent manner with an inclination angle equal to the inclination angle of the both side walls, and the width of the top plate is formed to be equal to or slightly smaller than the outer dimension of the upper ends of the both side plates of the container main body, and the top plate The length is equal to or slightly smaller than the external dimension of the upper ends of both side walls of the container body, and a notch with the upper part of the square wire left is formed at each corner of the both side plates and both side walls. A paper container lid featuring: