JP4651871B2 - Cooling container lid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lid for a cold insulation container used for a cold insulation container.
[0002]
[Prior art]
Conventionally, the upper lid and the lower lid are integrally formed by blow molding or the like, and then the upper lid and the lower lid are joined by hot air welding, high frequency welding or the like to form a hollow lid having a hollow inside, In addition, a lid for a cold insulation container in which a foamable resin liquid such as a foamable urethane resin is injected into the hollow lid from the injection hole and is heated and foamed and the inside is filled with the foamed resin is known (for example, actual No. 59-55173, No. 60-1084).
[0003]
[Problems to be solved by the invention]
The above-mentioned conventional lid for a cold container has a problem that the lid warps and deforms due to a difference in thermal expansion due to a temperature difference between the inside and outside of the cold container. And the thickness of the upper and lower lids is increased. However, when wavy irregularities or cross irregularities are formed on the lower lid, the detergency of the lid is poor, and the cold detergency container that contains foods and the like has a poor detergency of the lid. , It becomes a big problem. Further, when the thickness of the upper lid or the lower lid is increased, there is a problem that the lid becomes heavy.
[0004]
An object of the present invention is to solve the problems of the above-mentioned conventional cold container lid.
[0005]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention provides a lid for a cold storage container including a lower lid, an upper lid, and a heat insulating material disposed between the lower lid and the upper lid, wherein the lower lid includes a bottom plate, A peripheral wall extending upward from the periphery of the bottom plate; a horizontal flange extending outward from an upper end of the peripheral wall; an annular protrusion extending upward from a peripheral edge of the horizontal flange; A plurality of reinforcing and welding ribs extending upward beyond the flange, and the upper lid includes a top plate and an annular convex portion projecting along the periphery of the top plate. And an outer peripheral wall that forms the annular convex portion extends downward beyond the top plate, and a lower end of the outer peripheral wall has a horizontal flange that extends outward. An annular protrusion formed downward on the lower surface of the horizontal flange. When the upper lid is covered with the upper lid, an annular protrusion formed on the lower surface of the horizontal flange of the upper lid is placed on the horizontal flange of the lower lid, and A predetermined gap is formed between the annular projection formed on the horizontal flange and the horizontal flange of the upper lid, and the annular projection formed on the horizontal flange of the lower lid is formed on the upper lid. A rib for reinforcement and welding formed on the bottom plate of the lower lid when the upper lid is covered with the upper lid. Is configured to contact or substantially contact the lower surface of the top plate of the upper lid, and in such a state, the lower lid is vibrated in a horizontal direction, and thereby the horizontal flange of the lower lid is Formed on the horizontal flange of the upper lid Together have been the annular protrusions are welded, and reinforcing and welding rib and the top plate is formed in the bottom plate of the lower lid of the lid is that configured to be welded.
[0006]
【Example】
Examples of the present invention will be described below, but the present invention is not limited to these examples unless it exceeds the gist of the present invention.
[0007]
The lid | cover for cold storage containers of this invention is comprised from the heat insulating material M arrange | positioned between the lower cover C1, the upper cover C2, and the lower cover C1 and the upper cover C2.
[0008]
First, the lower lid C1 will be described with reference to FIGS. 1 to 3 and FIG.
[0009]
The lower lid C1 having a substantially rectangular shape in plan view has a bottom plate 1, a peripheral wall 2 extending upward from the periphery of the base plate 1 so as to surround the bottom plate 1, and an outer side from the upper end of the peripheral wall 2. A horizontal flange 3 extending horizontally is formed, and an annular protrusion 3 a extending upward is formed on the periphery of the horizontal flange 3. Further, a frame-like annular groove 4 is formed in the bottom plate 1 along the peripheral wall 2. Reference numeral 5 denotes a rib for reinforcing and welding formed on the bottom plate 1 positioned in the annular groove 4 and extending upward beyond the horizontal flange 3. The rib 5 has a cross section perpendicular to the longitudinal direction. The shape is formed in an elongated substantially trapezoidal shape. A plurality of ribs 5 are provided in a protruding manner in parallel to one opposite side of the bottom plate 1 and at a predetermined interval. In the present embodiment, an example is shown in which eight ribs 5 are provided so as to protrude in parallel to the opposing long sides 1a of the bottom plate 1. Reference numeral 6 denotes an air vent cylinder portion having a substantially frustoconical vertical cross section formed by expanding an appropriate portion of the bottom plate 1 upward, and is slightly lower than the rib 5.
[0010]
Next, the upper lid C2 will be described with reference to FIGS. 1, 4, 5, and 7. FIG.
[0011]
An upper lid C2 having a substantially rectangular planar shape that is substantially the same size as the lower lid C1 described above includes a top plate 7 and an annular convex portion 8 that projects in a frame shape along the periphery of the top plate 7. The outer peripheral wall 8 a that forms the annular protrusion 8 extends downward beyond the top plate 7. A horizontal flange 9 extending in the substantially horizontal direction is formed on the outer side from the lower end of the outer peripheral wall 8a forming the annular convex portion 8, and an annular protrusion 9a extending downward is formed on the lower surface of the horizontal flange 9. Is formed.
[0012]
As shown in FIGS. 6 and 7, when the upper lid C2 is put on the lower lid C1, the annular protrusion 9a formed on the horizontal flange 9 of the upper lid C2 is mounted on the horizontal flange 3 of the lower lid C1. And a predetermined gap is formed between the annular projection 3a formed on the horizontal flange 3 of the lower lid C1 and the horizontal flange 9 of the upper lid C2. The annular protrusion 3a formed on the horizontal flange 3 is configured to be located outside the annular protrusion 9a formed on the horizontal flange 9 of the upper lid C2. Thus, when the upper lid C2 is put on the lower lid C1, the rib 5 for reinforcing and welding formed on the bottom plate 1 of the lower lid C1 contacts or substantially contacts the lower surface of the top plate 7 of the upper lid C2. It is comprised so that it may contact. Note that when the upper lid C2 is put on the lower lid C1, the lower lid is located between the annular projection 9a formed on the horizontal flange 9 of the upper lid C2 and the annular projection 3a formed on the horizontal flange 3 of the lower lid C1. An annular groove 3b is preferably formed on the upper surface of the horizontal flange 3 of C1.
[0013]
As described above, before covering the lower lid C1 with the upper lid C2, the lower lid C1 is laid with a block-like or plate-like heat insulating material M formed of foamed resin. The heat insulating material M arranged on the lower lid C1 is laid so that the upper surface of the heat insulating material M does not protrude upward beyond the upper end of the rib 5 for reinforcing and welding, but the upper surface of the heat insulating material M is strengthened and welded. It is preferable that the rib 5 is disposed slightly below the upper end of the rib 5 for use.
[0014]
As described above, the lower lid C1 on which the heat insulating material M is spread is fixed to the base of the vibration welding machine, and the upper lid C2 is attached to the vibration device of the vibration welding machine, and then the vibration device is vibrated in the horizontal direction. Frictional heat is generated between the horizontal flange 3 of the lower lid C1 and the annular protrusion 9a formed on the horizontal flange 9 of the upper lid C2 placed on the horizontal flange 3 of the lower lid C1. The contact surface between the horizontal flange 3 of the upper lid C2 and the annular projection 9a formed on the horizontal flange 9 of the upper lid C2 and the vicinity thereof melt, and the annular projection 9a formed on the horizontal flange 3 of the lower lid C1 and the horizontal flange 9 of the upper lid C2. And a rib for reinforcement and welding formed on the top plate 7 of the upper lid C2 and the bottom plate 1 of the lower lid C1 in contact with or substantially in contact with the top plate 7 of the upper lid C2. Friction heat is generated between The contact surface between the top plate 7 of the lid C2 and the rib 5 formed on the bottom plate 1 of the lower lid C1 and the vicinity thereof melt, and the rib 5 formed on the top plate 7 of the upper lid C2 and the bottom plate 1 of the lower lid C1; Will be welded. The molten resin liquid generated during the welding operation between the horizontal flange 3 of the lower lid C1 and the annular projection 9a formed on the horizontal flange 9 of the upper lid C2 is the annular projection 9a formed on the horizontal flange 9 of the upper lid C2. And an annular groove 3b formed in the horizontal flange 3 of the lower lid C1 located between the annular projection 3a formed on the horizontal flange 3 of the lower lid C1 and formed in the horizontal flange 3 of the lower lid C1. The annular protrusion 3a can prevent the molten resin liquid from flowing out beyond the annular protrusion 3a.
[0015]
Next, a needle of a vacuum device (not shown) is inserted into the through hole 6a of the air vent cylinder portion 6 formed in the lower lid C1, and exists between the lower lid C1 and the upper lid C2 which are welded as described above. Remove air. Thereafter, the columnar portion 10a of the plug 10 formed of a thermoplastic resin is inserted into the through hole 6a of the air vent cylinder portion 6, and then the plug 10 is rotated at a high speed, so that the columnar portion 10a of the plug 10 is generated by frictional heat. The outer peripheral surface and / or the inner peripheral surface of the air vent cylinder portion 6 are melted to weld the stopper 10 and the air vent cylinder portion 6 to produce the cold container lid C.
[0016]
In the present invention, as described above, a plurality of reinforcing and welding ribs 5 formed on the bottom plate 1 of the lower lid C1 and the top plate 7 of the upper lid C2 are welded. Further, the rigidity is improved, and the warp deformation of the lid due to the difference in thermal expansion due to the temperature difference between the inside and outside of the cold container can be prevented.
[0017]
Since the rib 5 for reinforcing and welding is present inside the cold insulation container lid C, the outer surface of the cold insulation container lid C does not have wave-shaped unevenness or cross unevenness as in the conventional case. The cleanability of the lid C is improved.
[0018]
【The invention's effect】
Since the present invention has the above-described configuration, the following effects can be achieved.
[0019]
Since the plurality of reinforcing and welding ribs formed on the bottom plate of the lower lid and the top plate of the upper lid are welded, the strength and rigidity of the lid for the cold insulation container is improved, and heat due to the temperature difference between the inside and outside of the cold insulation container The warp deformation of the lid due to the expansion difference can be prevented.
[0020]
Since the ribs for reinforcing and welding are present inside the cold container lid, the outer surface of the cold container lid has no wave-like irregularities or cross irregularities as in the conventional case. Detergency is improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a cold container lid according to the present invention.
FIG. 2 is a perspective view of a lower lid constituting the cold container lid according to the present invention.
FIG. 3 is a vertical cross-sectional view along the long side direction of the lower lid constituting the cold insulation container lid of the present invention.
FIG. 4 is a perspective view of an upper lid constituting the cold insulation container lid of the present invention.
FIG. 5 is a vertical cross-sectional view along the long side direction of the upper lid constituting the cold insulation container lid of the present invention.
FIG. 6 is a vertical cross-sectional view along the short-side direction before assembling the cold insulation container lid of the present invention and before welding.
FIG. 7 is a partially enlarged vertical cross-sectional view of the cold insulation container lid of the present invention assembled and before welding.
FIG. 8 is a partially enlarged vertical sectional view of the vicinity of the air vent cylinder part of the cold insulation container lid of the present invention.
FIG. 9 is a partially enlarged vertical sectional view of the vicinity of the air vent cylinder of the lid for a cold insulation container according to the present invention.
[Explanation of symbols]
C ... Cold storage container cover C1 ... Lower cover C2 ... Upper cover M ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Insulation 5 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Rib

Claims (1)

A cold insulation container lid comprising a lower lid, an upper lid, and a heat insulating material disposed between the lower lid and the upper lid, wherein the lower lid extends upward from the bottom plate and the periphery of the bottom plate A horizontal flange extending outward from the upper end of the peripheral wall, an annular protrusion extending upward from the peripheral edge of the horizontal flange, and a plurality of reinforcements extending upward beyond the horizontal flange The upper lid has a top plate and an annular convex portion protruding along the periphery of the top plate, and forms the annular convex portion. An outer peripheral wall extends downward beyond the top plate, a horizontal flange extending outward is formed at a lower end of the outer peripheral wall, and a lower surface of the horizontal flange is formed on the lower surface of the horizontal flange. Is formed with an annular projection extending downward, and the upper lid is covered with the lower lid. The annular projection formed on the lower surface of the horizontal flange of the upper lid is placed on the horizontal flange of the lower lid, and the annular projection formed on the horizontal flange of the lower lid and the horizontal projection of the upper lid. A predetermined distance is formed between the flange and the flange, and the annular protrusion formed on the horizontal flange of the lower lid is positioned outside the annular protrusion formed on the horizontal flange of the upper lid. Further, when the lower lid is covered with the upper lid, the reinforcing and welding rib formed on the bottom plate of the lower lid contacts or substantially contacts the lower surface of the top plate of the upper lid. In such a state, the lower lid is vibrated in the horizontal direction, whereby the horizontal flange of the lower lid and the annular protrusion formed on the horizontal flange of the upper lid are formed. While being welded, Serial cold container lid, characterized in that the reinforcing and welding rib and the top plate is formed in the bottom plate of the lower lid of the upper cover is configured to be welded.

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