JPS5834051Y2 - insulation lid - Google Patents

Description

[Detailed description of the invention] Purpose of the invention The invention relates to an insulating lid that is placed on a container for keeping heat and cold.The purpose of the invention is to prevent the lid from deforming due to temperature changes and to increase the strength of the lid in use. That's true.

PRIOR ART As shown in FIG. 4, a heat insulating lid 21 for a conventional heat/cold container connects a top plate 22 and a back plate 23 in a hollow manner, and fills this hollow portion with a heat insulating material 24. With this configuration,
The front plate 22 and the back plate 23 were not connected in any way.

Therefore, food items that need to be kept warm, such as school lunch boxes, kept steamed meat buns, and sweet bean buns, are stored in the container and the insulated lid 21 is closed.
When the lid is closed, the back plate 23 is heated and curved downward,
In addition, when the heat insulating lid 21 is not in use, the back plate 23 tries to return to its original shape, and when used many times, the back plate 23 is repeatedly expanded and contracted, deforming it into a wavy shape, which has the disadvantage that it does not return to its original shape. .

Further, when foamed plastic is used as the heat insulating material 24, there is a drawback that the top plate 22 and the back plate 23 of the heat insulating lid 21 are bent along the longitudinal direction due to the foaming pressure.

Furthermore, in order to increase the cold retention properties of the heat insulating lid 21, a back plate 23 is provided.
A retainer plate 26 is attached to the retainer plate 26 via bolts 25, and a cold storage material 27 such as dry ice is sometimes interposed between the retainer plate 26 and the back plate 23. In this case, the bolts supporting the retainer plate 26 25 insertion holes must be provided on both the top plate 21 and the back plate 22, and there is also a drawback that outside air enters into the heat insulating lid 21 through these holes, reducing the heat insulation properties of the heat insulating lid 21.

In particular, when foamed urethane is used as the heat insulating material 24, the water absorption property of the foamed urethane causes the foamed urethane to absorb moisture from the outside through the insertion hole, resulting in a decrease in heat insulation properties.

Structure of the invention The present invention was made in view of the above-mentioned problems, and its gist is that a groove is formed on the periphery of the fitting protrusion protruding from the back plate of the hollow lid made of thermoplastic plastic, and A plurality of longitudinal grooves are formed at predetermined intervals in a direction perpendicular to the longitudinal direction of the fitting part, and a plate-like part at the tip of a plurality of deep recesses formed in the back plate of the hollow lid body, By connecting the top plate and back plate by crimping the plate-shaped portion at the tip of the shallow recess formed in the plate, deformation of the lid due to temperature changes is prevented, and at the same time, the usability strength of the lid is increased. Hereinafter, embodiments will be described with reference to the accompanying drawings.

In Figures 1 to 3, a hollow lid body 1 is made by blow molding thermoplastic plastic, and a rectangular top plate 2 and a rectangular back plate 3 are formed into a hollow shape. It is connected and integrated.

In the center of the back plate 2 of the hollow lid body 1, there is a container 4 for keeping heat and cold.
A rectangular fitting recess 5 for fitting the bottom of the container 4 is provided, and a rectangular fitting protrusion 6 protruding from the center of the back plate 3 for fitting the top of the container 4. has been done.

A narrow groove 7 is provided along the entire circumference of the fitting protrusion 6 protruding from the back plate 3 of the hollow lid body 1, and a narrow groove 7 is provided in a direction perpendicular to the longitudinal direction of the fitting protrusion 6. A plurality of (four in the embodiment) longitudinal grooves 8 are provided at predetermined intervals.

Further, the back plate 3 of the hollow lid body 1 has a large number of rectangular recesses 9.
A deep concave portion 10 with a flat tip is provided in the required concave portion 9, and a deep concave portion 10 with a flat tip is provided in the top plate 2 at a position corresponding to the deep concave portion 10. Shallow recesses 11 are provided respectively, and the plate-like portion 10a at the tip of the deep recess 10 and the plate-like portion 11a at the tip of the shallow recess 11 are pressed together to form a hollow lid body 1. The front plate 2 and the back plate 3 are connected to each other.

A hand-held portion 12 is provided at the center of each side of the hollow lid 1 in a direction perpendicular to the longitudinal direction, and a small hole 13 is formed in each side of each hand-held portion 12.

Then, a raw material made of plastic such as polystyrene, phenol resin, urethane, etc. mixed with a foaming agent is injected into the hollow lid 1 through the small holes 13, and is foamed and hardened, while the internal gas generated during foaming is discharged from the small holes 13. After foaming is completed, a plug 14 is loaded into each small hole 13.

The hollow lid body 1 is now filled with the heat insulating material 15 made of foamed plastic.

Incidentally, contrary to the above embodiment, a deep recess 10 may be formed in the front plate 2 of the hollow lid 1, and a shallow recess 11 may be formed in the back plate 3.

Effects of the Invention The insulating lid of the present invention has a groove formed on the periphery of the fitting protrusion protruding from the back plate of the hollow lid made of thermoplastic plastic, and a groove in the direction perpendicular to the longitudinal direction of the fitting part. A plurality of grooves are formed at predetermined intervals in the hollow lid, a plate-like part at the tip of a plurality of deep recesses formed on the back plate of the hollow lid body, and a plate-like part at the tip of a shallow recess formed on the front plate. Since the top plate and the back plate are connected by crimping, each groove and each recessed part functions as a deformation prevention material or a reinforcing material, and the back plate is used mainly because of the large temperature changes during use. It is possible to prevent deformation of the top plate or the back plate due to the foaming pressure during foaming of the plastic, increasing the usability strength of the lid as a whole. Since each plate is provided with a plurality of recesses and a plurality of grooves are provided in a direction perpendicular to the longitudinal direction of the fitting convex portion of the back plate, the usability strength of the top plate and the back plate itself is increased. .

In addition, grooves are provided around the entire circumference of the fitting recess that protrudes from the back plate of the hollow lid, so that the fitting convex part of the heat insulating lid is perfectly fitted to the top of the heat/cold container. can be done.

Furthermore, when increasing cold retention by interposing a cold storage material between the back plate of the hollow lid and the retaining plate disposed below the back plate,
Since an insertion hole for a bolt that supports the retaining plate can be bored in each plate-shaped portion at the tip of each concave portion, the retaining plate can be placed below the back plate of the hollow lid while maintaining the airtightness of the hollow lid. At the same time, the retainer plate can be easily attached and detached, and even if urethane foam, which has water absorption properties, is used as a filler, the hollow lid is sealed, so the urethane foam will not absorb moisture from the outside. Therefore, the heat insulation properties of the lid will not be reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the insulating lid according to the present invention, Fig. 2 is a perspective view of the inverted state, Fig. 3 is a cross-sectional view, and Fig. 4 is a sectional view of the conventional insulating cover. It is. Explanation of symbols of main parts 1...Hollow lid body, 2.
...Front board, 3...Back board, 4...
Container for heat/cold storage, 5... Fitting recess, 6...
...Mating convex portion, 7...Groove, 8...
Vertical groove, 10... Deep recess, 10a...
...Plate-like part of deep recessed part, 11...... Shallow recessed part, 11 a... Plate-like part of shallow recessed part, 12.
...Handheld part, 15...Insulation material.

Claims (1)

[Scope of utility model registration request] A rectangular top plate 2 made of thermoplastic plastic and a similar back plate 3 are hollowly connected to form an integrated hollow lid body 1, and a container 4 is attached to the top plate 2 of the hollow lid body 1. A rectangular fitting recess 5 is provided for fitting the bottom of the
A similarly rectangular fitting protrusion 6 for fitting the upper part of the container 4 is provided on the back plate 3, and a groove 7 is provided on the periphery of the fitting protrusion 60 protruding from the back plate 3. A plurality of deep recesses 1 are formed in the back plate 3 by providing a plurality of vertical grooves 8 at predetermined intervals in a direction perpendicular to the longitudinal direction of the fitting convex portion 6.
0 and the plate-like part 11 a at the end of the shallow recess 11 formed in the top plate 2 are pressed together to form the top plate 2.
and a back plate 3, a hand-held portion 12 is formed on each side in a direction perpendicular to the longitudinal direction of the hollow lid 1, and a heat insulating material 15 such as foamed plastic is filled in the hollow lid 1. Hollow insulation lid.