JP2011213410A - Container for food and drinks - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent occurrence of floating or detachment of a cover caused by an increase in the internal pressure of a heat insulating chamber in the cover.SOLUTION: Forcible fittings 12 and 21 are provided at the inner periphery of an inner recess 11 of a cover body and the outer periphery of a cover 20 covering the inner recess 11. The heat insulating chamber 40 is formed of the inner recess 11 and the cover 20. Engaging projections 22 and 16, reaching the positions where the projections are engaged with each other by the forcible fitting, are provided at the cover 20 and the inner recess 11 so that the load applied to the forcible fittings 12 and 21 by an increase in the internal pressure of the heat insulating chamber 40 is distributed to both of the engaging projections 22 and 16.

Description

  The present invention relates to a food and drink container such as a heat insulation lunch box and a water bottle.

  In food and drink containers, in order to keep the contents warm, a heat insulating chamber may be provided inside the lid. The heat insulating chamber forms an air heat insulating layer, accommodates a heat insulating material as necessary, and enhances heat insulating properties. Conventionally, as shown in FIGS. 5 and 6, there is a lid that forms a heat insulating chamber 53 containing a heat insulating material by combining a lid main body 51 and a lid cover 52. The inner recess 54 of the lid body 51 is formed by an inner wall surface that is recessed from the peripheral portion 55. As a means for fixing the lid cover 52 to the lid body 51, forcible fitting between the outer periphery of the lid cover 52 and the inner periphery of the middle recess 54 is employed. The lid employing this fixing means is also provided with a lid gripping part and a detachable structure to the container body. This is because, when a load in the anti-forced fitting direction is applied to the lid cover when attaching / detaching the lid or holding the lid, the forced fitting gradually loosens over and over, and the air insulation property of the heat insulation chamber decreases. In the illustrated example, a gripping portion is provided on the peripheral portion 55, and a detachable structure 56 for attaching to the container body is provided on the outer periphery of the wall portion forming the middle concave portion 54. The forcibly fitting portion 57 of the lid cover 52 and the forcibly fitting portion 58 of the lid main body 51 are respectively circumferential. Therefore, there is no directionality in the circumferential direction in the forced fit between the lid body 51 and the lid cover 52 itself. In the illustrated example, in order to perform circumferential alignment between the display portion (not shown) of the lid cover 52 and the lid main body 51, it is lower in the drawing than the forcibly fitting portion 58 on the inner periphery of the middle recess 54. Ribs 59 are provided at a plurality of locations, and a slit portion 60 is provided below the forcibly fitting portion 57 of the lid cover 52 in the drawing. Therefore, as shown in FIG. 7, the forcible fitting can be performed after the position is reliably determined at the circumferential position where the rib 59 enters the slit portion 60 (Patent Document 1).

JP 2007-313229 A

  As described above, since it is not necessary to consider the direct load in the anti-forced fitting direction on the lid cover, it has been considered that the above-mentioned forced fitting is sufficient for fixing the lid cover. However, in recent years, with the spread of dishwashers, the lid may be repeatedly washed with warm water. This is because the lid alone can be easily placed in the cleaning tank. Washing with a dishwasher is characterized by being heated for a long time with warm water in order to remove all dirt in the washing tank as compared with individual hand washing. Since it is a forcibly fitted portion between the middle recess and the lid cover that forms the heat insulation chamber, it is necessary to prevent ventilation between the heat insulation chamber and the outside air, and it is not possible to set a dimension that allows backlash in the force fit portion. For this reason, the internal pressure of the heat insulation chamber rises and a load is imposed on the forcibly fitting portion. As this is repeated, the forcibly fitting portion becomes loose, and the lid cover may float or come off. Further, if the forcibly fitting portion is loosened, the heat insulating performance may be deteriorated, or water may enter the heat insulating chamber during the cleaning.

  Accordingly, an object of the present invention is to prevent the lid cover from floating and coming off due to an increase in internal pressure of the heat insulation chamber.

  In order to solve the above-described problems, the present invention has a lid body provided with a middle recess and a lid cover that covers the middle recess, and is forcibly fitted to the outer periphery of the lid cover and the inner periphery of the middle recess. In the food and beverage container in which a heat insulation chamber is formed inside the lid by the middle recess and the lid cover, the lid cover and the middle recess are engaged with each other by the forced fitting. The structure is such that the load that is applied to both of the forcibly fitting portions due to the increase in the internal pressure of the heat insulation chamber is distributed to both the engaging projections.

  When forcibly fitting the lid cover and the lid body forcibly fitting, if an engagement protrusion reaching the position where they are engaged with each other is added to the lid cover and the middle recess, the lid cover and the lid body are placed inside the heat insulation chamber. The engagement structure can be added. If the internal pressure of the heat insulation chamber is distributed to both engaging projections where the load applied to both forced fit portions is applied, the forced fit portion when the internal pressure of the heat insulation chamber rises by repeated repeated hot water washing The burden of is reduced. Therefore, the lid cover can be prevented from floating or coming off.

  For example, the engagement protrusion on the lid cover side includes a claw that protrudes in the direction in which the lid cover and the middle recess are brought to face each other with the forced fit, and is opposed to the engagement protrusion on the middle recess. The engagement protrusions on the lid cover side that hit the front facing direction are elastically inclined to overcome the engagement protrusions on the inner recess side and elastically recover to reach the positions where they are engaged in the front facing direction. It can be constituted as follows.

  When a tool is inserted into the gap between the outer periphery of the lid cover and the inner periphery of the middle recess to forcibly raise the lid cover, the forced fitting portion can be removed. At this time, when the tool is inserted from a position corresponding to the inclination direction of the engagement projection on the lid cover side, the engagement projection on the lid cover side is pressed against the engagement projection on the middle recess side and tilts to engage each other. The lid cover can be forcibly removed because it is out of the matching position. Therefore, when the lid is discarded, the lid cover and the lid body can be separated. Moreover, even if it accommodates a heat insulating material in a heat insulation chamber, the separation process is not troubled.

  In particular, the engagement protrusion on the side of the middle recess is preferably provided so as to partially protrude from the bottom of the center recess in the facing direction.

  Since the middle recess is recessed at the bottom and the engagement protrusion on the middle recess side is provided, the lid does not travel on the inside of the container, and adding the engagement protrusion affects the capacity of the container body. There is no.

  For example, the forcibly fitting portion of the middle recess and the lid cover is formed in a circumferential shape, and the circumferential direction in which the lid cover can be forcibly fitted is determined by the engagement protrusion of the middle recess and the lid cover. The configuration can be limited by the directionality in the circumferential direction given to the shape.

  The circumferential direction in which the lid cover can be forcibly fitted is limited by the directionality in the circumferential direction given to the shape of the inner recess and the engagement protrusion of the lid cover, so the example of FIG. As described above, it is not necessary to position the lid cover in the circumferential direction between the rib and the slit portion. Therefore, it is not necessary to secure the length of the rib and the slit portion in the direction of the central axis of the circumference, and the lid can be made compact.

  As described above, according to the present invention, by adopting the above configuration, the internal pressure of the heat insulation chamber is distributed to the both engagement protrusions in which the load applied to both of the forced fitting portions due to the increase in the internal pressure of the heat insulation chamber is applied. It is possible to prevent the lid cover from floating and coming off due to the rising.

Longitudinal front view showing the overall configuration of the container for food and drink according to the embodiment of the present invention 1 is an exploded perspective view of the lid of FIG. (A) is a longitudinal front view showing a stage before the lid cover and the lid main body of FIG. 2 are directly opposed and forcedly fitted, and (b) is an engagement protrusion on the lid cover side from the state (a). FIG. 4C is a longitudinal front view showing a point in time when the contact hits the engagement protrusion on the inner recess side, and FIG. 6C shows the engagement protrusion on the lid cover side over the engagement protrusion on the inner recess side from the state of FIG. Longitudinal front view showing the point in time (A) is a longitudinal front view showing the way of raising the lid cover by inserting the tool for removing the lid cover of FIG. 1, and (b) is a state where the engagement protrusion on the lid cover side is removed from the state of (a). Longitudinal front view showing the condition Longitudinal front view showing a lid of a container for food and drink of a conventional example 5 is an exploded perspective view of the lid of FIG. (A) is a longitudinal sectional front view showing a stage before the lid cover and the lid main body of FIG. 6 are directly opposed and forcibly fitted, and (b) is a state in which the rib enters the slit portion from the state of (a). Vertical view showing

  Embodiments according to the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the embodiment is an example in which the present invention is applied to a lid of a food and drink container including a lunch box. The lid includes a lid body 10 provided with a middle recess 11 and a lid cover 20 covering the middle recess 11. Forcibly fitting portions 21 and 12 are provided on the outer periphery of the lid cover 20 and the inner periphery of the middle recess 11. A heat insulation chamber 40 is formed inside by the middle recess 11 and the lid cover 20. A heat insulating material 41 is accommodated in the heat insulating chamber 40.

  An attachment / detachment structure 13 to / from the container body 31 is provided on the outer periphery of the wall portion forming the middle recess 11. The container body 31 is stored in a double heat insulating container 32. The middle recess 11 is formed by an inner wall surface that is recessed from the peripheral portion 14 of the lid body 10. The middle recess 11 can be formed as a separate part from the peripheral portion 14. The detachable structure 13 is screwed. The peripheral portion 14 is provided so as to cover the outer peripheral edge of the double heat insulating container 32 in order to double as a lid and a gripping portion of the container body 31. A packing 15 that seals between the inner periphery of the double heat insulating container 32 is fitted to the outer periphery of the wall portion that forms the middle recess 11. The packing 15 is provided in order to prevent the space between the double heat insulating container 32 and the container body 31 and the circulation of the outside air and to improve the heat retention.

  The forcibly fitting portions 12 and 21 are each formed in a circumferential shape. The forcibly fitting portion 12 on the side of the middle recess 11 is a concave groove portion extending in the circumferential direction, and the forcibly fitting portion 21 on the lid cover 20 side is a protruding portion extending in the circumferential direction. The concave groove portion can be the lid cover 20 side, and the protrusion can be the middle concave portion 11 side. The inner periphery of the middle recess 11 and the outer periphery of the lid cover 20 are circumferential in the entire region facing the circumferential radial direction. Therefore, as shown in FIGS. 3A to 3B, the forcibly fitting portions 12 and 21 are forcibly brought into close contact with the lid cover 20 and the middle concave portion 11 in the circumferential central axis direction. Can be fitted.

  Further, the lid cover 20 and the middle recess 11 have engaging protrusions 22 and 16 that reach positions where they are engaged with each other by performing the forcible fitting process shown in FIGS. Due to the increase in the internal pressure of the heat insulating chamber 40, the load applied to the both forced fitting portions 12, 21 is distributed to the both engaging projections 16, 22.

  Specifically, the engagement protrusion 22 on the lid cover 20 side is formed of a claw protruding in the direction of approaching the front. The engagement protrusions 22 are provided at two locations, and are respectively located at the substantially central portions of the circumference. Each engagement protrusion 22 bends in the circumferential diameter direction so that the free end sides thereof are inclined toward the center of the circumference. Because of the circumferential nature of the outer periphery of the lid cover 20 and the inner periphery of the middle recess 11, the engagement protrusions 16, 22 are located as few as possible in the center of the circumference. The load distribution to the both engaging protrusions 16 and 22 can be equalized in the circumferential direction by the number 22 of arrangement.

  The engagement protrusion 22 is injection-molded integrally with the lid cover 20 so as not to increase the number of parts.

  The engagement protrusion 16 on the side of the middle recess 11 is provided so as to partially protrude from the bottom of the middle recess 11 in the directly facing direction. The engaging protrusion 16 is a bridge-shaped portion having a bridge girder.

  The engagement protrusion 16 is injection-molded integrally with the middle recess 11 so as not to increase the number of parts.

  As is apparent from FIGS. 2 and 3 (a), the two engaging protrusions 22 on the lid cover 20 side are inserted in the bridge through-holes of the engaging protrusions 16 on the intermediate recess 11 side in the facing direction. Is done. The facing direction in which the bridge through hole of the engaging protrusion 16 is rectangular and the two engaging protrusions 22 form a pair corresponds to the short direction of the bridge through hole of the engaging protrusion 16. Yes. For this reason, the insertion is possible only when the opposing direction of the two engaging protrusions 22 and the short direction of the bridge through hole of the engaging protrusion 16 coincide. Therefore, the circumferential direction in which the lid cover 20 can be forcibly fitted to the middle recess 11 is limited by the circumferential directionality given to the shapes of the engaging protrusions 16 and 22. Since the wall surface for forming the slit part 60 and the rib 59 of FIG. 7 is unnecessary in the facing direction, the lid can be made compact.

  When the lid cover 20 and the middle concave portion 11 are further brought closer to each other in the directly facing direction from the state of FIG. 3A, as shown in FIG. The engagement protrusion 22 on the lid cover 20 side that hits the opposite direction is inclined elastically. When approaching further from the state of FIG. 3 (b), the engagement protrusion 22 eventually crosses over the engagement protrusion 16 on the middle recess 11 side and elastically recovers, as shown in FIG. At substantially the same time as the forcibly fitting portions 12 and 21 are fitted, the engaging projections 22 and 16 reach a position where they are engaged in the facing direction.

  As shown in FIG. 1, a slight front-facing clearance is set between the engaging protrusion 22 and the engaging protrusion 16 in a state where the forcibly fitting portions 12 and 21 are completely fitted with each other. This is in anticipation of a molding error, and in a state in which the forcibly fitting portions 12 and 21 are completely fitted, the engagement projection 22 is surely reached so that the engagement projection 22 and the engagement projection 16 are engaged with each other. This is for excessively pushing in the engaging protrusion 16 in the facing direction. As long as it reaches a position where the engaging protrusions 22 and the engaging protrusions 16 are engaged with each other with the forcibly fitting parts 12 and 21 completely fitted, in practice, even if the above-mentioned gap in the facing direction is not generated. Good. Even if the facing gap is present, the cover cover 20 and the bottom of the middle recess 11 expand outward due to the increase in the internal pressure of the heat insulating chamber 40, so that both the engaging protrusions 22 and 16 have a predetermined internal pressure or higher. Then, the load is reliably applied, and the load applied to both the forced fitting portions 12 and 21 is distributed.

  Therefore, the embodiment can prevent the lid cover 20 from floating or coming off due to an increase in the internal pressure of the heat insulating chamber 40. In addition, what is necessary is just to determine suitably the predetermined internal pressure or more presuming the warm water washing | cleaning by a dishwasher on the basis of the standard state equilibrated under 20 degreeC and standard atmospheric pressure. For example, when the internal pressure when the lid is immersed in warm water of 80 ° C. for 20 minutes is adopted, it can be used for a general household dishwasher.

The heat insulating material 41 is accommodated while securing a space 41a in which the engaging protrusions 22 and 16 are provided. The heat insulating material 41 can be omitted. As the heat insulating material 41, a polystyrene foam material is employed.
The lid cover 20 and the middle recess 11 are made of the same resin for injection molding in order to unify the thermal expansion of the forced fitting portions 21 and 12 respectively. Since the general resin for injection molding and the expanded polystyrene cannot be subjected to the resource regeneration process at the same time, the lid cover 20, the middle recess 11 and the heat insulating material 41 are separately collected at the time of disposal. Even when the heat insulating material 41 is omitted, it is preferable to separate the lid cover 20 and the lid body 10 in order to facilitate the pulverization process of resource reprocessing.

  As shown in FIGS. 4 (a) and 4 (b), when the tool is forcibly raised by inserting a tool into the gap between the outer periphery of the lid cover 20 and the inner periphery of the middle recess 11, the forced fitting portions 21, 12 are forcedly raised. Can be removed. At this time, as shown in the figure, when the tool is inserted from a position corresponding to the inclination direction of the engagement protrusion 22, the engagement protrusion 22 is inclined by being pressed against the edge of the engagement protrusion 16, and is engaged with each other. Therefore, the lid cover 20 can be forcibly removed. In the embodiment, the position where the tool is inserted is a circumferential diametrical direction and a circumferential position parallel to the short direction of the engaging protrusion 16. Thus, the embodiment can separate the lid cover 20 and the lid body 10 when the lid is discarded. Moreover, the heat insulating material 41 can be taken out and collected separately.

  Each of the above embodiments is an application example to a lunch box, but the technical scope of the present invention is not limited to the above-described embodiment, and all modifications within the scope of the technical idea based on the description of the claims. Is included.

DESCRIPTION OF SYMBOLS 10 Lid body 11 Middle recessed part 12, 21 Force fitting part 13 Detachable structure 14 Peripheral part 15 Packing 16, 22 Engagement protrusion 20 Lid cover 31 Container body 40 Thermal insulation chamber 41 Thermal insulation

Claims (4)

A lid body provided with a middle recess, and a lid cover covering the middle recess, and a forcibly fitting portion is provided on an outer periphery of the lid cover and an inner circumference of the middle recess; In a food and beverage container in which a heat insulating chamber is formed inside the lid by the lid cover,
The lid cover and the middle recess have engaging protrusions that reach positions where they are engaged with each other by the forcibly fitting, and a load applied to both the forcibly engaging parts due to an increase in the internal pressure of the heat insulating chamber is distributed to the both engaging protrusions. A container for food and drink.   The engagement protrusion on the lid cover side is a claw that protrudes in a direction to bring the lid cover and the inner recess close to each other with the forced fit, and is positive with respect to the engagement protrusion on the inner recess. The engagement protrusion on the lid cover side that hits the opposite direction is elastically inclined to overcome the engagement protrusion on the inner recess side and elastically recover to reach a position where it engages in the opposite direction. The container for food and drink according to 1.   The food / drink container according to claim 2, wherein the engagement protrusion on the side of the middle recess is provided so as to partially protrude in a facing direction from the bottom of the center recess.   The forcibly fitting portion of the inner recess and the lid cover is formed in a circumferential shape, and the circumferential direction in which the lid cover can be forcibly fitted is the shape of the engaging projection of the inner recess and the lid cover. The container for food and drink according to any one of claims 1 to 3, wherein the container is limited by the directionality in the circumferential direction given to.

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