JP2005074116A - Lunch box for warming cabinet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lunch box for a warming cabinet, which is easily opened/closed even by a child and is excellent in sealing property. <P>SOLUTION: The lunch box has a substantially circular shape in a plane view and includes a lunch box body 100 with an open top, which is made of a resin base material provided with heat resistance so as not to be deformed even if it is heated in the heat insulation chamber; and a lid body 200 to cover and seal the lunch box body 100, which is made of the resin base material provided with heat resistance so as not to be deformed and not become hot even when heated in the heat insulation chamber. Lock means for freely rotatably locking the lid body 200 in a peripheral direction from an attachable/detachable position to/from the lunch box body 100 to a sticking position are arranged on the outer peripheral side surface of the lunch box body 100 and the inner peripheral side surface of the lid body 200. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lunch box for an infant such as a nursery school child or a kindergarten child, and the present invention relates to a lunch box for a heat storage box on the premise of keeping warm in a heat storage box.

  In nursery schools and kindergartens, especially in the winter, lunch boxes are warmed in a heat storage. Many nurseries and kindergartens recommend a traditional lunch box made of aluminum and a lid. Because, in recent years, a synthetic resin lunch box is provided with a lock claw at the upper edge of the main body and the lock claw is provided at the edge of the lid in order to improve the sealing between the main body and the lid. This is because most of the hooks are configured to be hooked on the to-be-locked claw, and many infants find it difficult to open and close the lock claw.

  As a lunch box provided with this type of locking claw, there is one described in Japanese Patent Application Laid-Open No. 2003-135127 (Patent Document 1).

JP 2003-135127 A

  However, the traditional aluminum lunch box is inferior in hermeticity, so there is a lot of leakage of juice, and there is a problem that it becomes too hot for an infant when heated in a heat storage. Nevertheless, traditional aluminum lunch boxes have become mainstream in terms of ease of handling for infants.

  Moreover, the thing of the above-mentioned patent document 1 is not desirable from a viewpoint of the ease of opening and closing for an infant.

  The present invention has been developed in view of the above circumstances, and an object thereof is to provide a heat storage box lunch box that is easy for an infant to open and close and is excellent in hermeticity.

  In order to solve the above-mentioned problems, a lunch box for a heat insulation box according to the present invention has a heat resistance and an upper opening-shaped lunch box body made of a resin material that does not deform even when heated in a heat insulation box. The lunch box is made of a resin material that does not deform even when heated in a heat storage, and includes a lid body that covers the lunch box body so that the lunch box body can be sealed, and includes an outer peripheral side surface of the lunch box body and On the inner peripheral side surface of the lid body, there is provided locking means for locking the lid body so as to be rotatable in the circumferential direction from a position where the lid body can be attached to and detached from the lunch box body.

  Resin packing is provided on the edge of the back surface of the lid. When the packing abuts on the upper end surface of the upper end edge of the lunch box body, the sealed state of the lunch box body and the lid is realized.

  The locking means includes a locking groove provided on the inner peripheral side surface of the lid body at a predetermined pitch interval, and an outer peripheral side surface of the lunch box body that protrudes outward at a predetermined pitch interval. It has the structure which has the latching convex part which latches to the said latching groove part by rotation of and makes the said cover body the state sealed with respect to the said lunch box main body.

  More preferably, a main body side handle protrudes from the outer peripheral surface of the lunch box main body, and a lid body side handle is provided on the upper surface of the lid body. As this lid side handle, for example, there is one that is provided along the diameter direction of the lid and is formed so as to be positioned between two recesses dug down from the upper surface of the lid.

  In this lid, when the internal pressure of the heat storage box lunch box in a sealed state becomes equal to or higher than a preset first value, the internal pressure is released to the outside, and the internal pressure is set to a second value set in advance. In the case of the following, an intake / exhaust valve for introducing outside air is provided.

  In the case of the lunch box for the heat insulation box according to the first aspect of the present invention, the lunch box body and the lid are hermetically sealed by the locking means. There is nothing to do. In addition, since the lunch box body and the lid are made of a resin material, even if they are warmed in a heat storage, they do not become too hot, and as a result, there is an advantage in improving safety.

  In the case of the warm box lunch box according to claim 2 of the present invention, the packing abuts on the upper end surface of the upper edge of the lunch box body, thereby improving the sealed state of the lunch box body and the lid. Can do.

  In the case of the warm box lunch box according to claim 3 according to the present invention, when the lid is rotated, the latching convex portion of the lunch box body is latched in the latch groove of the lid, and the lid is The lunch box body can be hermetically sealed. In other words, since the sealed state can be realized only by rotating the lid, the attachment / detachment of the lid is very easy and easy to use.

  In the case of the heat storage box lunch box according to claim 4 of the present invention, the lunch box body is provided with a main body side handle. Therefore, the lid body can be removed from the lunch box body without directly touching the lunch box body heated in the heat insulating box, and the lunch box body can be carried. Further, even a child of about 3 years old with a small hand can fix the main body by grasping the main body side handle.

  In the case of the heat storage box lunch box according to claims 5 and 6 of the present invention, since the lid side handle is provided on the upper surface of the lid body, it is convenient when rotating the lid body. In particular, even a child about 3 years old with a small hand can remove the lid simply by pinching the handle on the lid side and rotating it.

  In the case of the warm box lunch box according to claim 7 of the present invention, the internal pressure of the warm box lunch box in a sealed state can be automatically adjusted. Therefore, the internal pressure of the heat insulation box lunch box falls, the inside becomes vacuum and the lid does not open, or the internal pressure of the heat insulation box lunch box rises, resulting in the heat insulation box lunch box bursting. Nothing will happen.

  Hereinafter, a lunch box for a heat storage according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a heat storage box lunch box according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the lunch box. 3 is a side view of the lunch box body of the lunch box, FIG. 4 is an enlarged cross-sectional view of a portion A of FIG. 1 of the lunch box, and FIG. 5 is a schematic development view of the inner peripheral side surface of the lid of the lunch box, FIG. 6 is a view for explaining the intake and exhaust valves of the lunch box, where (a) is a plan view, (b) is a back view, and FIG. 7 is a cross-sectional view of the right half showing the use state of the lunch box. It is the shown front view.

  1 and FIG. 2 is a lunch box for a heat insulation box according to the present invention, which is a lunch box having a substantially circular shape in plan view that can be heated in the heat insulation box, and a lunch box body 100 having a substantially circular shape in plan view with an open top. The lunch box body 100 is provided with a substantially circular lid 200 in plan view that closes and seals the lunch box body 100. Hereinafter, each part will be described in detail. In addition, the heat retention box here means that whose set temperature is set to 15 to 100 ° C.

  As shown in FIGS. 1, 2 and 3, the lunch box main body 100 is a molded product made of a resin material, such as polypropylene, which has heat resistance and does not deform even when heated in a heat insulation box. On the outside of the upper edge 110 of the lunch box body 100 (that is, on the outer peripheral side surface), four locking projections 111 protrude at equal intervals (90 ° intervals). This locking convex part 111 is a convex pulse of an inverted triangular shape in front view extending obliquely upward, and is locked to a locking groove part 211 of the lid body 200 described later, thereby constituting a part of the locking means. To do. However, the amount of protrusion of the locking projection 111 is set to a small amount in consideration of the fact that an infant may put a mouth on the upper edge 110 of the lunch box body 100 during a meal.

  In addition, one main body side handle 121 is formed on the outer peripheral surface 120 of the lunch box main body 100 so as to protrude in the lateral direction. The main body side handle 121 contributes to the infant properly holding the lunch box body 100 during meals, and also helps the infant to properly hold the lunch box body 100 when the lid 200 is opened and closed.

  The bottom of the lunch box body 100 has a thread bottom 130 as shown in FIG. As shown in FIG. 7, the thread bottom 130 fits into a recess 242 (see paragraph number 0026 described later) of the lid 200 of another heat storage box lunch box when stacked. Thereby, even if it puts on another heat storage box lunch box in a heat storage, it does not slip down.

  On the other hand, the lid 200 is a molded product made of a resin material, such as polypropylene, which has heat resistance and does not deform even when heated in a heat storage. Four locking portions 210 as shown in FIGS. 4 and 5 are provided at equal intervals (90 ° intervals) on the inner peripheral side surface of the lid 200. The locking portion 210 is a convex pulse extending obliquely upward in the figure, and a locking groove 211 is formed at the center thereof. The depth dimension of the locking groove 211 is slightly deeper than the length dimension of the locking projection 111. Therefore, when the lid 200 is rotated, the locking projection 111 enters the locking groove 211 from one end in the horizontal direction of the locking groove 211, and thereby the locking projection 111 is locked to the locking groove 211. It is.

  Further, as shown in FIG. 4, a groove 220 is formed at the edge of the back surface of the lid 200. A packing 230 made of, for example, silicon rubber is set in the groove 220. The packing 230 abuts on the upper end surface 112 of the upper end edge 110 of the lunch box body 100 to realize a sealed state of the lunch box body 100 and the lid body 200. As described above, when the locking projection 111 is locked to the locking groove 211, the upper end surface 112 of the lunch box body 100 is pressed against the packing 230, thereby increasing the contact state.

  Further, a lid side handle 241 is formed on the upper surface of the lid body 200 to be a handle when the lid body 200 is rotated. The lid-side handle 241 is provided along the diameter direction of the lid 200 and is positioned between two recesses 242 and 242 dug down from the upper surface of the lid 200.

  Further, as shown in FIG. 2, a through hole 2421 is formed in one of the recesses 242 of the lid 200, and the intake / exhaust valve 300 is attached to the through hole 2421. As shown in FIG. 6, the intake / exhaust valve 300 includes outer flanges 310 and 310 that close the intake grooves 2421 a and 2421 a connected to the through holes 2421, and exhaust grooves 2421 b and 2421 b that are connected to the through holes 2421. Inner flanges 320 and 320 are closed. The outer flanges 310 and 310 are opened when the internal pressure of the heat storage box lunch box in a hermetically sealed state exceeds a first value, while the inner flanges 320 and 320 have an internal pressure of When it becomes equal to or less than a preset second value, it opens. That is, the intake / exhaust valve 300 opens the outer flanges 310 and 310 to release the internal pressure to the outside when the internal pressure becomes the first value or more, while the internal pressure becomes the second value or less. The inside flanges 320 and 320 are opened to introduce outside air into the inside.

  In addition, unevenness 250 as a slip stopper is formed on the outer peripheral surface of the lid 200.

The usage method etc. of the lunch box for heat insulation which comprised in this way are demonstrated.
First, when sealing with the lid 200 with staple food and side dishes in the lunch box main body 100, the locking groove 211 of the lid 200 is aligned with the locking convex 111 of the lunch box main body 100. (That is, the lid 200 is adjusted to a position where it can be attached to and detached from the lunch box body 100). Thereafter, the locking projection 111 is inserted into the locking groove 211, and the lid body 200 is rotated in the circumferential direction from the detachable position to the position close to the lunch box body 100. Then, the latching convex part 111 is latched by the latching groove part 211, and the upper end surface 112 of the lunch box body 100 is pressed by the packing 230 of the lid body 200, whereby the warm box lunch box is sealed.

  The heat storage box lunch box in this state is stored in the heat storage. If the internal air expands due to the heating by the heat storage and the internal pressure of the heat storage box lunch box exceeds a preset first value, the intake / exhaust valve 300 is opened, and the internal pressure is released to the outside. As a result, there is no risk that the sealed heat storage box lunch box will burst.

  Further, when the internal pressure of the heat storage box lunch box is equal to or lower than a preset second value, the intake / exhaust valve 300 is opened, and the outside air is introduced into the heat storage box lunch box. That is, since the internal pressure of the heat storage box lunch box can be maintained in a normal state, there is no fear that the infant cannot open the lid 200.

  When the infant opens the lid 200, the body side handle 121 of the lunch box body 100 is held with one hand while the heat storage box lunch box is placed on a table or the like, and the lid body is held with the other hand. The lid body side handle 241 of 200 is pinched and the lid body 200 is rotated via the lid body side handle 241. By this rotation, the lid 200 is rotated and detached from the lunch box body 100 contrary to the above-described sealing. At this time, since the hand placed on the lid 200 is not the periphery of the lid 200 but the lid-side handle 241 provided on the upper surface of the lid 200, the lid 200 can be easily opened even by a small hand. It is. Moreover, since the lunch box main body 100 is also fixed by gripping the main body side handle 121 by hand, the lid 200 can be easily opened.

  In addition, if the main body side handle 121 is formed in a shape like a handle in a coffee cup, it can be used as a cup after the meal is over.

  In addition, as shown in FIG. 7, if a removable small container is provided inside the lunch box main body 100, there is a merit that the juice exuded from the side meal does not reach the staple food. It is also possible to take a meal out of the main body 100.

  In the case of such a heat storage box lunch box, the locking projection 111 of the lunch box body 100 is locked to the locking groove 211 of the lid body 200, and the upper end surface 112 of the lunch box body 100 is connected to the lid 200. By pressing the packing 230, the lunch box body 100 and the lid body 200 are hermetically sealed, so that the juice does not leak like the conventional aluminum lunch box. In addition, since the lunch box body 100 and the lid body 200 are made of a resin material, even if they are warmed in a heat storage, they do not become too hot, and as a result, there is a merit in improving safety. .

  This heat storage box lunch box is heat resistant and has a top-opening lunch box body made of a resin material that does not deform even when heated in a heat storage room, and has heat resistance and does not deform even when heated in a heat storage. A lunch box made of a resin material and having a lid that covers the lunch box body so as to be hermetically sealed, and having a substantially circular shape in plan view, the outer circumferential side surface of the lunch box body and the inner circumferential side surface of the lid body having a lid Any design modification may be performed as long as a locking means is provided for locking the body in a circumferential direction from a position where the body can be attached to and detached from the lunch box body to a close contact position.

  Therefore, the locking means is constituted by the locking groove portion 211 of the lid 200 and the locking convex portion 111 of the lunch box body 100. However, any means can be used as long as the same function as described above can be realized. You can use it. Moreover, as for the material of the lunch box main body 100 and the lid 200, any resin material may be used as long as it has heat resistance and does not deform even when heated in a heat insulating box. In addition, providing the main body side handle 121, the lid side handle 241 and the intake / exhaust valve 300 is optional.

It is a schematic sectional drawing of the lunch box for heat insulation boxes concerning an embodiment of the invention. It is a rough separation perspective view of the lunch box. It is a side view of the lunch box main body of the lunch box. It is an expanded sectional view of A part of FIG. 1 of the lunch box. It is a schematic developed view of the inner peripheral side surface of the lid of the lunch box. It is a figure for demonstrating the intake / exhaust valve of the lunch box, (a) is a top view, (b) is a back view. It is the front view which showed the right half which shows the use condition of the lunch box in the cross section.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Lunch box main body 111 Locking convex part 121 Main body side handle 200 Cover body 211 Locking groove part 241 Cover body side handle

Claims (7)

  Lunch box body with a top opening made of a resin material that has heat resistance and does not deform even when heated in a heat storage chamber, and the lunch box body that consists of a resin material that has heat resistance and does not deform even when heated in a heat storage chamber A lunch box having a substantially circular shape in plan view, the lid body being detachable from the lunch box body on the outer peripheral side surface of the lunch box body and the inner peripheral side surface of the lid body. A warming box lunch box, characterized in that it is provided with locking means for locking in a circumferential direction from a position to a close contact position.   The lunch box for a heat insulation box according to claim 1, wherein a resin packing that contacts the upper end surface of the upper end edge portion of the lunch box body is provided on an edge portion of the back surface of the lid body. Lunch box for heat insulation.   3. The lunch box for a heat storage box according to claim 2, wherein the locking means includes a locking groove portion provided at an inner peripheral side surface of the lid body at a predetermined pitch interval, and an outer peripheral side surface of the lunch box main body at a predetermined pitch interval. And a locking projection that locks into the locking groove by rotation of the lid and seals the lid against the lunch box body. A lunch box for a heat storage.   4. A heat storage box lunch box according to claim 1, wherein a main body side handle protrudes from the outer peripheral surface of the lunch box main body.   The warm box lunch box according to claim 4, wherein a lid side handle is provided on an upper surface of the lid body.   The lunch box for a heat storage box according to claim 5, wherein the lid side handle is provided along a diameter direction of the lid body, and is located between two recesses dug down from the upper surface of the lid body. A lunch box for a heat storage.   The warm box lunch box according to claim 1, 2, 3, 4, 5, or 6, wherein the lid body has an internal pressure of the warm box lunch box in a sealed state equal to or higher than a preset first value. In this case, an intake / exhaust valve is provided to introduce internal air into the internal pressure when the internal pressure is released to the outside and the internal pressure falls below a preset second value. Lunch box for storage.

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