JP2000318724A - Tray-type food container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain respective sectioned containers having a sense of high grade with an opening periphery protruding on a surface of a tray-shaped frame by preventing defect and deformation from occurring due to overlap of a different-colored resin on an outer peripheral face of an opening. SOLUTION: A sectioned container 1 made of a resin formed with dish-like recesses comprises a frame-shaped tray 2 molded of a different-colored thermoplastic synthetic resin for holding its opening periphery 1a on the same plane. A protrusion 3 projecting from a surface of the tray 2 with an outer peripheral face 4 inclined like a bank on an exterior of the opening periphery 1a has a locking surface 5 which is made to protrude so that the outer peripheral face 4 is folded outward like a hook to be supported on the tray 2 inside the outer peripheral face 4. In addition it is equipped on a lower part of the outer peripheral face 4 with a flange 6 for preventing an injected resin from leaking, which is projected from a lower part of a surface of the tray 2 toward a front rim of the protrusion 3 and includes a horizontal surface 7 leveled with a surface of the tray.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tray type tableware made of synthetic resin in which a plurality of tableware-shaped recesses are integrally formed in a shape as if a plurality of tableware are arranged on the surface, and in particular, this tray is provided. The present invention relates to a configuration of a tray-type tableware which is not disposable but provided to a user as a lunch box by a food service provider or the like, collected after use, and used continuously.

[0002]

2. Description of the Related Art Conventionally, this type of tray-type tableware includes a plurality of dish-shaped recesses such that various containers are fitted in a single tray frame plate made of synthetic resin having a predetermined size. There is widely known a structure having a recess.

[0003] Further, as this kind of tableware, disposable ones in which a plurality of tableware-shaped recesses are formed in a single thin synthetic resin sheet, and meal-providers and the like provided to users as lunch boxes and used. Some of them are collected later and used continuously, and those used continuously are registered utility model No. 305.
As shown in Japanese Patent No. 6542, in order to make it appear as if the ceramic tableware is fitted into the tray-shaped frame plate, the periphery of the opening of the table-shaped recess representing the ceramic tableware is projected upward from the surface of the tray-shaped frame plate. Moreover, the color of the peripheral edge of the opening of the dish-shaped recess and the color of the surface of the tray-shaped frame plate are different from each other, for example, the peripheral edge of the opening of the dish-shaped concave portion represents ceramic white, whereas the tray-shaped frame plate is not. It is known to color-code as represented by a black color imitating a lacquered wood board.

[0004]

[Problems to be Solved] Registered Utility Model No. 305654
The tray type tableware of No. 2 is obtained by integrally synthesizing a resin-made divided container forming a dish-shaped concave portion and a frame plate-shaped tray portion for holding each of the divided containers in a molding stage, that is, First, only the sectional container is molded using the convex mold and the concave mold for forming the sectional container, and then, while the sectional container is still fitted in the convex mold, the sectional container is fitted into the convex mold. It is based on the insert-type double molding method in which another concave mold for molding the frame plate-shaped tray is fitted and the frame plate-shaped tray is molded outside the sorting container. According to this, it is possible to form a high-quality tableware in which the peripheral edge of the opening of each of the divided containers projects on the surface of the tray-shaped frame plate.

However, in the above-mentioned molding method, since the divided container is first molded independently, as shown in FIG. 5A, when the divided container A is molded, a resin is formed on the outer peripheral surface B of the opening of the divided container A. 5b, the container C having such a depression C may be fitted into a convex mold D as shown in FIG. 5b. Since a gap E is formed between the container A and the container C, another concave mold G is fitted into the convex mold D in which the compartment container A is fitted, and resin is press-fitted from the inlet H. When the frame plate-shaped tray portion F is formed on the outside, a part of the resin for forming the frame plate-shaped tray portion F flows into the gap E between the recess C and the convex mold D of the divided container A, and is different. There is a problem that a defective deformed portion I is generated due to overlapping of colored resins.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional tray-type tableware, and in the step of forming a divided container, a special shape is previously formed on the lower surface of the outer peripheral surface of the opening. By providing the flange portion, even if there is a dent due to resin shrinkage on the outer peripheral surface of the opening of the compartmentalized container, when the resin for forming the frame plate-shaped tray portion is injected outside the compartmentalized container, By the flange on the lower surface of the outer peripheral surface of the opening, the resin for molding the frame plate-shaped tray portion is prevented from flowing into the gap between the recess and the convex mold of the divided container. It is an object of the present invention to provide a tray-type tableware in which defective deformed portions due to overlapping of resins of different colors are not generated.

According to the first aspect of the present invention, as a specific means, there are provided a plurality of individually formed resin-made compartments for forming tableware-shaped recesses, and a plurality of compartments outside these compartments. A frame plate-shaped tray portion molded in a separate process to hold the container so that the opening edge is on the same plane, and the divided containers are placed on the surface of the frame plate-shaped tray portion at each opening edge. A tray-type tableware which is fitted into a fitting portion of the tray portion so as to have a protruding projection portion and is formed integrally with the tray portion, wherein the projection portion provided on a periphery of an opening of the sorting container is provided. On the lower surface, the frame plate-shaped tray portion protrudes from the lower part of the surface of the frame plate-shaped tray portion formed in another process to the front edge side of the projection, and the frame plate-shaped tray portion protrudes toward the front edge side of the projection portion. Of resin with the same level of surface as the surface of Characterized in that it comprises a stop flange portion Re.

According to a second aspect of the present invention, in the first aspect of the present invention, the resin leakage preventing flange provided on the lower surface of the projection forming the peripheral edge of the opening of the compartmentalized container is formed in a wedge-shaped cross section together with the horizontal surface of the upper surface. It is characterized by having been done.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of a tray-type tableware according to the present invention will be described with reference to the embodiment shown in the drawings. As shown in FIG. A plurality of molded resin divided containers 1;
In order to hold each of the divided containers 1 so that their opening peripheral edges 1a are on the same plane, they are formed by a different process using a thermoplastic synthetic resin of the same type as that of the divided containers 1 and having a different color. It is basically constituted by the frame plate-shaped tray portion 2.

The compartmentalized container 1 is injection molded in the shape of a ceramic tableware using, for example, a polypropylene resin.
In forming, as shown in FIGS. 1 to 4, the projecting portions 3 projecting from the surface of the frame plate-like tray portion 2 whose outer peripheral surface 4 is inclined outside of the opening peripheral edge 1 a of each of the divided containers in the shape of a dam. Is formed so as to be provided.

As shown in FIGS. 1 to 3, the outer peripheral surface 4 of the projecting portion 3 provided on the peripheral edge 1a of the opening of the container 1 is bent outward from the peripheral edge 1a of the container 1 in a hook shape. And has a locking surface 5 supported by the frame plate-shaped tray portion 2 inside the outer peripheral surface 4, and a portion below the outer peripheral surface 4 below the surface of the frame plate-shaped tray portion 2. From the front side of the protrusion 3 to the front edge side of the protrusion 3 and a leak-proof flange portion of the injected resin having a horizontal surface 7 at the same level as the surface of the frame plate-shaped tray portion on the upper surface of the portion protruding to the front edge side of the protrusion 3. 6 are provided.

The resin leakage preventing flange 6 provided on the lower surface of the projection 3 forming the periphery of the opening of the compartmentalized container 1 has a front edge 6a which forms an inclined surface in a direction opposite to the outer peripheral surface 4. Preferably, the cross-sectional shape including the horizontal surface 7 on the upper surface is formed in a wedge shape.

After the divided containers 1 are formed, the frame plate-shaped tray portion 2 is formed outside the divided containers 1. A method for forming the frame plate-shaped tray portion 2 is shown in FIG.
As shown in the figure, a concave mold G is fitted in a state where the sectional container 1 is fitted in the convex mold D, and the same kind of resin different in color from the sectional container 1 is injected into the concave mold G, A frame plate-shaped tray portion 2 is placed outside each of the sorting containers 1 around the opening edge of the sorting container opening 1.
a so as to be held on the same plane.

The frame plate-shaped tray portion 2 is formed so as to be provided with fitting portions 8 for fixing the respective sorting containers 1.
It is preferable that the recess 9 has the same shape as the container 1 that wraps around the entire outer peripheral surface of the container 1. The container 3 has the projection 3 of the opening edge 1a protruding above the surface of the frame plate tray 2. In this way, each of the concave portions 9 is fitted into each of the concave portions 9, and is integrally molded with the resin of the tray portion 2 for forming the concave portions 9.

In the above embodiment, the projecting portion 3 provided on the periphery 1a of the opening of the compartmentalized container 1 is moved outward from the periphery 1a of the opening of the compartmentalized container 1 as shown in FIGS. It is bent into a hook shape and protruded so as to provide a locking surface 5 supported by the frame plate-shaped tray portion 2 inside the outer peripheral surface 4. The shape of the protruding portion 3 is shown in FIG. As shown, without bending the outer peripheral surface 4 outward in a hook shape,
Below the protrusion 3 having the outer peripheral surface 4, a portion that protrudes from the lower part of the surface of the frame plate-shaped tray portion 2 toward the front edge of the protrusion 3 and that protrudes toward the front edge of the protrusion 3. The flange portion 6 having a horizontal surface 7 at the same level as the surface of the frame plate-shaped tray portion 2 may be integrally provided on the upper surface, and the locking surface 5 may be provided on the lower surface of the flange portion 6.

[0016]

The tray-type tableware according to the present invention has a structure in which the projecting portion is provided on the lower surface of the outer peripheral surface 4 of the projecting portion 3 at the opening periphery 1a of the sorting container 1 from below the surface of the frame plate-shaped tray portion 2. 3 is provided on the upper surface of a portion protruding to the front edge side of the protrusion 3 and to the front edge side of the protruding portion 3. Therefore, as shown in FIG. 3, when the preformed molded container 1 is fitted to the convex mold D, the upper horizontal surface 7 of the flange 6 contacts the front lower surface of the projection outer peripheral surface 4 of the convex mold D. .

In this state, when the concave mold G is fitted to the convex mold D and the resin of the frame plate-shaped tray portion 2 is poured outside the divided container 1, the divided container 1 itself is pressed by the pressure of the injected resin. By being pressed against the convex mold D, the upper horizontal surface 7 of the flange portion 6 is firmly pressed to the lower surface of the convex mold D. As a result, as shown in FIG. 5A and FIG.
Even if there is a dent C due to shrinkage and a gap E is generated between the projection outer peripheral surface 4 and the convex mold D, the molding resin of the frame plate-shaped tray portion 2 is 5D is prevented from flowing in the direction of the gap between the metal mold and the convex mold D, and the occurrence of defective deformed portions due to overlapping of different colored resins as shown in FIG. 5C can be reliably prevented.

The front edge 6a of the flange 6 provided on the lower surface of the projection 3 of the sorting container 1 is fixed to the outer peripheral surface 4 of the projection 3.
If the cross-sectional shape including the horizontal surface 7 on the upper surface is a wedge type, the concave mold G is fitted as shown in FIG. When the resin is injected, the flange front edge 6a inclined by the pressure of the injected resin is pushed up obliquely from below as shown by the arrows in FIGS. 1 and 4, and the flange 6 is crimped to the lower surface of the convex mold D. Help to do.

As described above, according to the present invention, when the container and the frame plate-shaped tray portion are formed into a tray-type tableware by forming the tray-type tableware by being pressed and molded twice to form a tray-type tableware. Due to the flange provided on the lower surface, even if there is a recess due to shrinkage on the surface of the projection of the preformed container, defective deformation due to the overlapping of resins of different colors at the stage of forming the frame plate tray It is possible to reliably prevent the occurrence of a portion, and it is possible to manufacture an excellent molded product having no variation in quality.

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing the configuration of a tray-type tableware according to the present invention.

FIG. 2 is a perspective view showing a sectional structure when the tray-type tableware of FIG. 1 is applied to a lunch box.

FIG. 3 is a sectional view showing a step of forming the tray-type tableware according to the present invention.

FIG. 4 is a partial cross-sectional view showing a configuration of another embodiment of the same portion as FIG. 1;

FIG. 5 is a view showing a problem in molding this type of conventional tray-type tableware, wherein a is a partial perspective view of a divided container,
b is a partial sectional view showing a molding process, and c is a perspective view of a molded product.

[Explanation of symbols]

 1: Division container 1a: Opening periphery 2: Frame plate tray 3: Projection 4: Projection outer peripheral surface 5: Locking surface 6: Flange 6a: Flange front edge 7: Horizontal plane 8: Fitting part 9 : Depressed portion A: Divided container B: Opening outer peripheral surface C: Depressed portion D: Convex die E: Clearance F: Frame plate tray portion G: Recessed die H: Injection port I: Poorly deformed portion

Claims (2)

[Claims] 1. A plurality of separately formed resin-made divided containers forming a dish-shaped concave portion, and each of the divided containers is arranged outside the divided containers so that the peripheral edges of the openings are on the same plane. And a frame plate-shaped tray portion molded in a separate step to hold the container so that the divided containers have projections protruding above the surface of the frame plate-shaped tray portion at the periphery of each opening. A tray-type tableware which is fitted into the fitting portion and is integrally formed with the tray portion, wherein a frame plate formed in a separate step on a lower surface of the projection provided on the periphery of the opening of the sorting container. Of resin having a horizontal surface at the same level as the surface of the frame plate-shaped tray portion on the upper surface of the portion protruding from the lower portion of the surface of the tray portion toward the front edge side of the projection portion, and projecting toward the front edge side of the projection portion. Tray-type tableware with a leak-proof flange. 2. A tray mold according to claim 1, wherein a front edge of said resin leakage prevention flange provided on a lower surface of a projection forming an opening edge of the compartment container is formed in a wedge-shaped cross section together with a horizontal surface of the upper surface. Tableware.