JP2009190783A - Container with lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container with a lid which can maintain the pressure in the container at a predetermined pressure when a food or the like is cooked in a microwave oven. <P>SOLUTION: A swelling part 21, a part of which is swelled inward, is formed at the upper end of a vertical wall formed at the outer end of an opening flange of the container 3. Meanwhile, a pressure control hole 25 is provided on the ceiling panel 24 of the lid 2 and also a vertical wall 33 is provided in a standing state at the outer end of a flat plate part formed projectingly outward from the upper end of the outer wall of the lid 2 and when the container 3 is closed with the lid 2, the lower part of the swelling part 21 and the upper end of the vertical wall 33 may be pressed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a container with a lid for food or the like that is cooked in a microwave oven, and more particularly to a container with a lid that can keep the pressure inside the container at a predetermined pressure.

  Conventionally, when food is cooked using a microwave oven, the container is used with a lid provided with a steam vent so that the food stored in the container does not scatter even when the food is heated. It is a common practice to close the lid. Further, when it is necessary to steam with food when heating food or the like, the container is wrapped with a resin film. At this time, if the pressure in the container is increased, the resin film is not stretched and expanded and is not torn, so leakage of stored food or the like to the outside of the container is prevented. However, carefully wrapping the resin film on the container is time-consuming, and steam easily leaks from the gap between the resin film and the container, and the steaming effect may be halfway. Many.

In order to solve the above problem, Patent Document 1 discloses that when the temperature in the container is increased by heating in a microwave oven and steam is generated and the internal pressure is increased, the lid is pushed up by the expanded air, and the skirt portion of the lid is An outer lid of a container is disclosed in which steam is released from the formed convex groove. By using this configuration, the outer lid does not come off even when the pressure in the container rises, so that complicated work such as wrapping with a resin film is unnecessary.
Japanese Patent Laid-Open No. 2001-80682 (see [0005])

  If the configuration disclosed in Patent Document 1 is used, even if the vapor pressure rises in the container, the vapor is removed through the convex groove, so that food in the container leaks or scatters. You can prevent it. However, even if the outer lid is not easily removed from the container, at the start of cooking, the outer lid and the container are not attached to the temporary protrusions and the opening flange formed on the inner surface of the skirt portion of the outer lid. Only the outer end is temporarily fixed. Therefore, since the outer lid is pushed up and the steam leaks even if the pressure in the container is slightly increased, the pressure in the container is hardly increased, and a high-pressure cooking effect cannot be expected.

  The present invention has been made paying attention to such problems, and the object of the present invention is to provide a container with a lid that can keep the pressure inside the container at a high pressure when cooking food or the like in a microwave oven. There is to do.

  In order to solve the above-mentioned problem, the invention of a container with a lid according to claim 1 is a container with a lid in which a synthetic resin lid is similarly closed to a synthetic resin container. A bulging portion that bulges inward is formed at the upper end of the vertical wall portion formed at the outer end, while the top plate portion of the lid body is provided with a pressure adjusting hole, and the outer wall portion of the lid body A vertical wall portion is formed at the outer end of the flat plate portion that extends outward from the upper end, and when the container is closed by the lid body, the lower portion of the bulging portion and the flat plate portion are formed. The upper end of the vertical wall portion is in a pressed state.

  According to the first aspect of the invention, the lid is locked to the container by fitting the annular convex portion formed on the lid to the annular concave portion formed on the container, and the fitting portion Thus, sealing is performed so that liquid or vapor in the container does not easily leak out of the container. Moreover, if the lower part of the bulging part formed in the vertical wall part of the outer end of the opening flange part of the container and the upper end of the vertical wall part erected on the flat plate part of the lid body are in a pressed state, the lid body is Since it is pressed downward, the sealing performance at the fitting portion is more reliable.

  Furthermore, even if steam escapes from the pressure adjustment hole in the top plate portion of the lid body, if the pressure in the container increases to exceed the limit of the seal in the fitting portion, the container and the lid body are deformed according to the pressure. Therefore, a gap through which steam or the like leaks is formed, and the lid body pressed by the bulging portion is not easily detached from the container.

  According to a second aspect of the present invention, in the lidded container according to the first aspect, the lower portion of the bulging portion has a height of an intermediate portion sandwiched between the lower surfaces of both end portions with respect to the lower surfaces of both end portions in the circumferential direction. It is characterized by being lowered.

  According to the second aspect of the present invention, the upper end of the vertical wall portion of the lid body can be caused to sink from one end of the lower portion of the bulging portion of the container by rotating the lid body with respect to the container. it can. Furthermore, if the lid is rotated, the upper end of the vertical wall portion will sink under the middle portion that is formed low at the lower portion of the bulge portion, and both the upper end and the middle portion will be engaged in the pressed state while being compressed and deformed. Will match.

  According to a third aspect of the present invention, in the container with a lid according to the first or second aspect, the vertical wall portion formed on the flat plate portion bulges the lid body when the lid body is attached to the container. A portion of the circumferential direction is recessed so that the portion and the vertical wall portion do not interfere with each other.

  According to the third aspect of the present invention, since the position of a part of the vertical wall portion of the flat plate portion of the lid located at the position corresponding to the bulging portion of the container is shifted inward, the lid Can be prevented from interfering with the bulging portion of the container and the flat plate portion of the lid. Further, the upper end of the vertical wall portion corresponding to the start portion whose position is shifted inward can easily sink into the lower portion of the bulging portion of the container when the lid body is rotated with respect to the container.

  According to a fourth aspect of the present invention, in the container with a lid according to any one of the first to third aspects, the lid is rotated with respect to the container after the lid is mounted on the container. Then, the container is closed by the lid body by letting the upper end of the vertical wall portion formed on the flat plate portion enter under the intermediate portion of the bulging portion in a pressed state. It is.

  According to a fifth aspect of the present invention, in the lidded container according to any one of the first to fourth aspects, a part of the vertical wall portion formed on the flat plate portion extends outward to protrude the protrusion. Is formed, and a convex portion is formed on the projecting piece.

  According to the fifth aspect of the present invention, when the lid is rotated with respect to the container and the upper end of the vertical wall portion of the lid is pushed into the lower portion of the bulging portion of the container in a pressed state, the projecting piece Since it contacts the circumferential end of the bulging portion, the lid cannot be rotated any further. Therefore, the lid body does not rotate so much that the pressing state between the upper end of the vertical wall portion of the lid body and the lower portion of the bulging portion of the container is eliminated. In addition, since the protrusion is formed on the protruding piece, when the protruding piece is picked with a finger and the lid is removed from the container, the protruding portion is surely hooked on the fingertip, so that the protruding piece does not slide out of the fingertip. There is no need to put extra force on the fingertips.

  According to a sixth aspect of the present invention, in the container with a lid according to the fifth aspect, the opening flange portion of the container has the lid attached to the container, and the opening flange portion and the flat plate portion of the lid body. A wide portion that can accommodate the protruding piece is formed.

  According to the sixth aspect of the present invention, when the lid is attached to the container and the opening flange portion of the container and the flat plate portion of the lid are in contact with each other, the projecting piece is placed on any part of the container in the wide portion. Is also accommodated without contact. Therefore, when removing the lid by releasing the closed state of the container by the lid, if the lid is rotated back to the position where the projection is accommodated in the wide portion, the projection is easily picked by the fingertip. be able to.

  According to the present invention, when cooking food or the like in a microwave oven, the pressure inside the container can be maintained at a predetermined pressure, so that a steaming effect on the food or the like can be obtained, so a container with a lid that can be used as a simple pressure container Can be provided.

(First embodiment)
Hereinafter, an embodiment of a container with a lid embodying the present invention will be described with reference to FIGS.
The lid 2 and the container 3 in the present embodiment are formed by vacuum forming a polyethylene sheet, but other known resins such as polypropylene and polystyrene can be used.

  The container 3 is demonstrated using FIG.1, FIG.4, FIG.6 (b) and FIG. The container 3 includes a side wall extending upward from the outer end of the bottom plate 10, an opening flange portion 16 formed to extend outward from the upper end of the side wall, and extending upward from the outer end of the opening flange portion 16. A vertical wall portion 18 formed so as to protrude and a bulging portion 21 formed so as to bulge inwardly at four upper end portions 19 of the vertical wall portion 18 are provided. The side wall includes a first side wall 11 constituting a lower portion of the side wall, a slope 12 formed by being connected to an upper end of the first side wall 11, a flat plate portion 13 extending outward from the upper end of the slope 12; The flat plate portion 13 is constituted by a second side wall 15 connected through a shallow annular recess 14.

  A wide part 17 extended outward is formed in a part (two places) of the opening flange part 16, and the wide part 17 serves as a handle of the lidded container 1 of the present embodiment. When the lid 2 is attached to the container 3, a protruding piece 37 of the lid 2 described later is accommodated without coming into contact with other parts of the container 3. Further, an upper end flange portion 20 is formed at the upper end portion 19 of the vertical wall portion 18 so as to extend outward, and the vertical wall portion 18 is reinforced, and a part of the upper end flange portion 20 is a part of the bulging portion 21. Is configured.

  In the lower part of the bulging portion 21, end lower surfaces 22 on both sides in the circumferential direction are inclined, and an intermediate portion 23 is formed by connecting the end lower surfaces 22. Since the height of the intermediate portion 23 from the opening flange portion 16 is lower than the height of the vertical wall portion 33 of the lid body 2, the vertical wall portion 33 of the lid body 2 described later is placed below the bulging portion 21. When submerged, each of them is elastically compressed and deformed, and the vertical wall portion 33 and the bulging portion 21 are pressed against each other.

  As shown in FIGS. 1, 4, and 6 (a), the lid 2 includes a top plate portion 24, an inner wall portion 28 formed to extend downward on the outer periphery thereof, and an outer wall from the lower end of the inner wall portion 28. A side wall is formed in a double structure by a connecting flat plate portion 29 extending in the direction and an outer wall portion 30 connected to the inner wall portion 28 by the connecting flat plate portion 29 and extending upward. Has been. The outer wall portion 30 is formed with a low annular convex portion 31 and is extended outwardly at the upper end thereof to form a flat plate portion 32. Further, a vertical wall is formed upward at the outer end of the flat plate portion 32. A portion 33 is erected. In the four portions of the vertical wall portion 33, the inner vertical wall portion 35 in which the oblique vertical wall portions 34 are arranged on both sides is recessed, and thereby the cutout portion 36 having a shape in which a part of the flat plate portion 32 is cut out. Is formed.

  A pressure adjusting hole 25 is formed near the center of the top plate portion 24. The pressure adjusting hole 25 is formed to have a hole diameter appropriately selected within a range of 1 to 3 mm in diameter according to cooking conditions such as food stored in the container. Further, on the outer side of the pressure adjusting hole 25 in the radial direction, a concentric two-circular annular reinforcing portion 26 is formed, and furthermore, at five locations on the ridgeline portion formed by the top plate portion 24 and the inner wall portion 28. A reinforcing portion 27 is formed as a stepped recess. The reinforcing portion 27 is used as a portion where a finger is hung when the lid body 2 is rotated.

  Projecting pieces 37 that extend outward from the upper end of the vertical wall portion 33 and serve as knobs are formed at two locations on the vertical wall portion 33 of the lid 2, and small downward projections are formed near the center of the protruding piece 37. A portion 38 is formed. Even if the fitting state between the annular concave portion 14 and the annular convex portion 31 is somewhat tight, the convex portion 38 is formed between the convex piece 37 and the finger when the lid 2 is removed from the container 3 by grasping the convex piece 37 with the finger. Serves as an anti-slip function.

  Now, the lidded container 1 when the lid 2 is attached to the container 3 will be described with reference to FIGS. 2 and 4. In the container 1 with a lid, the annular convex portion 31 of the lid body 2 is fitted into the annular concave portion 14 on the outer periphery of the container 3 in a state where food is contained in the container 3, and the outer wall portion 30 of the lid body 2. Are sealed on the second side wall 15 of the container 3 and the flat plate part 32 are respectively pressed on the opening flange part 16 so that the liquid or vapor in the container 3 does not easily leak out of the container 3. That is, the projecting pieces 37 formed at two positions on the lid 2 are accommodated in the wide portions 17 formed at two positions of the container 3 corresponding to the projecting pieces 37 without contacting any part of the container 3. Has been. At this time, cutout portions 36 are provided at four locations on the flat plate portion 32 of the lid body 2 so that the vertical wall portion 33 does not interfere with the bulging portion 21 formed in the container 3 by the cutout portions 36. Be placed.

  Next, as shown in FIG. 3, the container 3 is placed on the container 3 by placing a finger on one of the reinforcing portions 27 formed at the five ridge lines formed by the top plate portion 24 and the inner wall portion 28 of the lid 2. On the other hand, if the lid body 2 is rotated in the clockwise direction, for example, the vertical wall portion 33 and the part of the oblique vertical wall portion 34 of the lid body 2 are guided to the lower end surface 22 of the bulging portion 21. It sinks below the bulging portion 21. At that time, the vertical wall portion 33 and the intermediate portion 23 below the bulging portion 21 are in a pressing relationship with each other, and by the reaction, the press contact state between the flat plate portion 32 of the lid body 2 and the opening flange portion 16 of the container 3 is further increased. It will be certain. Further, when the projecting piece 37 comes into contact with the bulging portion 21, the lid body 2 cannot be rotated any further. Therefore, it is prevented that the lid 2 is rotated too much and the pressing relationship between the vertical wall portion 33 and the bulging portion 21 is released. At this time, the tip end side of the projecting piece 37 is elastically deformed and rides on the upper end of the vertical wall portion 33.

And in this state, if the container 1 with a lid | cover is accommodated in the store | warehouse | chamber of a microwave oven and high frequency heating is performed, since the container 3 and the cover body 2 are sealed, pressure cooking is performed.
Therefore, according to the lidded container of the above embodiment, the following effects can be obtained.

  (1) In the above embodiment, the lid 2 is locked to the container 3 by fitting the annular projection 31 formed on the lid 2 to the annular recess 14 formed on the container 3. . If the lid 2 is rotated with respect to the container 3, the lower part of the bulging portion 21 of the container 3 and the upper end of the vertical wall 33 of the lid 2 are pressed, and the lid 2 is pressed downward. Thus, the lid 2 can be more securely locked to the container 3 together with the locking at the fitting portion.

  (2) In the above embodiment, since the pressure adjustment hole 25 is provided in the top plate portion 24 of the lid body 2, if the pressure in the container increases, steam or the like escapes from the pressure adjustment hole 25 and the inside of the container 3 The pressure can be adjusted. Therefore, appropriate pressure cooking can be performed in heat cooking of food in the container 3.

  (3) In the above embodiment, the upper end of the vertical wall portion 33 of the lid body 2 is turned to the lower surface of one end portion of the lower portion of the bulging portion 21 of the container 3 by rotating the lid body 2 with respect to the container 3. I was able to dive in from 22. Further, if the lid body 2 is rotated, the upper end of the vertical wall portion 33 enters under the intermediate portion 23 of the bulging portion 21, and both the upper end of the vertical wall portion 33 and the intermediate portion 23 are pressed while being compressed and deformed. Since it is made to engage with a state, the cover body 2 can close the container 3 more reliably.

  (4) In the above embodiment, since the notch portion 36 is provided in the flat plate portion 32 of the lid body 2 at a position corresponding to the bulging portion 21 of the container 3, the lid body 2 is mounted in the axial direction of the container 3. When doing, interference with the bulging part 21 of the container 3 and the flat plate part 32 of the cover body 2 can be prevented. Therefore, the annular convex part 31 of the lid body 2 and the annular concave part 14 of the container 3 can be easily fitted.

  (5) In the above embodiment, when the lid 2 is rotated with respect to the container 3, the projecting piece 37 comes into contact with the circumferential end of the bulging portion 21, so that the lid 2 is further rotated. I can't. For this reason, it can prevent that the cover body 2 rotates too much, so that the press state of the upper end of the vertical wall part 33 of the cover body 2 and the lower part of the bulging part 21 of the container 3 is eliminated. In addition, since the convex portion 38 is formed on the projecting piece 37, when the projecting piece 37 is picked with a finger and the lid 2 is removed from the container 3, the projecting portion 38 is surely hooked on the fingertip. Therefore, since the protruding piece 37 does not slide out easily from the fingertip, it is possible to provide the lidded container 1 that allows the lid body 2 to be removed without applying excessive force even for a woman with weak fingertip force.

  (6) In the above embodiment, when the lid body 2 is attached to the container 3 and the opening flange portion 16 of the container 3 and the flat plate portion 32 of the lid body 2 are in contact with each other, the projecting piece 37 is in the opening flange portion 16. It floated without coming into contact with other parts of the container 3. Therefore, when the lid 2 is released from the closed state with respect to the container 3 and the lid 2 is removed, the lid 2 is rotated with respect to the container 3 so that the protruding piece 37 is accommodated in the wide portion 17. When the lid 2 is returned, the protruding piece 37 can be easily picked with the fingertip.

(Second Embodiment)
Next, a second embodiment of the container 41 with a lid embodying the present invention will be described with reference to FIGS. 8 and 9 with a focus on differences from the first embodiment.

  As shown in FIGS. 8 and 9, the container 43 of the present embodiment includes a side wall 51 extending upward from the outer end of the bottom plate 10, a slope 52 formed by being connected to the upper end of the side wall 51, The container 3 of the first embodiment is different from the container 3 of the first embodiment in that the opening flange 16 is formed to extend outward from the upper end of the inclined surface 52. A vertical wall portion 18 extending upward from the outer end of the opening flange portion 16 and a bulging portion 21 formed so as to bulge inward at four upper end portions 19 of the vertical wall portion 18. The container 3 and the container 43 have the same configuration.

  As shown in FIGS. 8 and 9, the lid body 42 is formed by extending the top plate portion 24, an inner wall portion 28 extending downward on the outer periphery thereof, and extending outward from the lower end of the inner wall portion 28. The portion constituted by the connected flat plate portion 29 has the same configuration as that of the first embodiment. A flat plate portion 45 is formed by extending outward at the upper end of an outer wall portion 44 that is connected to the outer end of the connecting flat plate portion 29 and extends upward. A vertical wall 46 is provided toward the front. At four locations of the vertical wall portion 46, the inner vertical wall portion 48 in which the oblique vertical wall portion 47 is arranged on both sides is recessed, and thereby, a cutout portion 49 having a shape in which a part of the flat plate portion 45 is cut out. Is formed.

  Projecting pieces 37 that extend outward from the lower end of the vertical wall portion 46 and serve as knobs are formed at two locations on the vertical wall portion 46 of the lid 42, and a small downward projection is formed near the center of the protruding piece 37. A portion 38 is formed. When the lid body 42 is attached to the container 43, as shown in the left half of FIG. 9, since the convex portion 38 rides on the opening flange portion 16, the protruding piece 37 is warped upward.

  Now, the closing of the lid 42 with respect to the container 43 in the lidded container 41 will be briefly described. As in the case of the lidded container 1, when the lid body 42 is attached to the container 43, the flat plate portion of the lid body 42 so that the vertical wall portion 46 and the flat plate portion 45 do not interfere with the bulging portion 21 of the container 43. The cutout portions 49 and the bulging portions 21 formed at the four locations 45 are arranged correspondingly.

  Next, if a finger is put on one of the reinforcing portions 27 formed at five locations of the lid body 42 and the lid body 42 is rotated clockwise, for example, with respect to the container 43, the lid body 42 is inclined. Along with a part of the vertical wall portion 47, the vertical wall portion 46 is guided by the lower end surface 22 of the bulging portion 21 and sinks below the bulging portion 21. At that time, as shown in the right half of FIG. 9, the vertical wall portion 46 and the flat plate portion 45 and the intermediate portion 23 below the bulging portion 21 are in a pressing relationship with each other. While the opening flange portion 16 of the container 43 is in a pressure contact state, the inclined surface 52 of the container 43 and the inner surface of the outer wall portion 44 of the lid body 42 are brought into close contact with each other, thereby improving the sealing performance.

  Further, when the projecting piece 37 comes into contact with the bulging portion 21, the lid body 42 cannot be rotated any further. Accordingly, it is possible to prevent the pressing relationship between the vertical wall portion 46 and the flat plate portion 45 and the bulging portion 21 from being released by excessively rotating the lid body 42. At this time, the tip end side of the projecting piece 37 is elastically deformed and rides on the upper end of the vertical wall portion 33.

Therefore, according to the container with a lid of the said embodiment, in addition to the effect of 1st Embodiment, the following effects can be acquired.
(7) In the above-described embodiment, the lid 42 is rotated with respect to the container 43, and the vertical wall 46 together with a part of the oblique vertical wall 47 of the lid 42 is the lower surface of the end of the bulging portion 21. It was guided by 22 and sunk under the bulging part 21. Therefore, not only the vertical wall portion 46 but also the vertical wall portion 46 and the flat plate portion 45 and the intermediate portion 23 below the bulging portion 21 are in a pressing relationship with each other, so that the container 42 can be more reliably closed by the lid 42. A lidded container 41 can be provided.

(Example of change)
In addition, you may change the said embodiment as follows.
In the above embodiment, the lid 2 and the container 3 are formed by vacuum forming, but may be formed by other forming methods such as blow molding.
-In above-mentioned embodiment, although the protrusion 37 was formed in two places of the vertical wall part 33 of the cover body 2, you may form the protrusion 37 only in one place.
In the above embodiment, the pressure adjustment hole 25 is drilled near the center of the top plate portion 24, but the pressure adjustment hole 25 may be drilled at any position of the top plate portion 24.
-In above-mentioned embodiment, although the convex part 38 was formed in the protrusion 37 downward, the convex part 38 may be formed upward. The number of convex portions 38 may be plural.

The perspective view before attaching the cover body of 1st Embodiment of this invention to a container. The top view which shows the state which mounted | wore the container of 1st Embodiment of this invention with the cover body. The top view which shows the state which rotated the cover body and closed the container with the cover body. AA sectional drawing in FIG. BB sectional drawing in FIG. (A) is a top view of a cover body, (b) is a top view of a container. CC arrow line view in Fig.6 (a). The perspective view before mounting | wearing the container with the cover body of 2nd Embodiment of this invention. In a state where the lid is attached to and closed in the container of the second embodiment of the present invention, the left half is a cross-sectional view showing a portion in which the protruding piece is accommodated in the wide portion, and the right half is a flat plate portion and a vertical wall portion Sectional drawing which shows the part which sunk in the lower part of the bulging part.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,41 ... Container with lid, 2,42 ... Lid, 3,43 ... Container, 13, 32, 45 ... Flat plate part, 16 ... Opening flange part, 17 ... Wide part, 18, 33, 46 ... Vertical wall part , 21 ... bulging part, 22 ... lower end surface, 23 ... intermediate part, 24 ... top plate part, 25 ... pressure adjusting hole, 30, 44 ... outer wall part, 37 ... projecting piece, 38 ... convex part.

Claims (6)

  In a container with a lid in which a synthetic resin lid is similarly closed with respect to a synthetic resin container, a bulge bulging inwardly at the upper end of a vertical wall portion formed at the outer end of the opening flange portion of the container The top plate portion of the lid body is provided with a pressure adjusting hole, and the vertical wall portion is formed at the outer end of the flat plate portion formed to extend outward from the upper end of the outer wall portion of the lid body. When the container is closed by the lid, the container with the lid is characterized in that the lower part of the bulging part and the upper end of the vertical wall part formed on the flat plate part are pressed.   2. The container with a lid according to claim 1, wherein a height of an intermediate portion sandwiched between lower surfaces of both end portions of the lower portion of the bulging portion is lower than lower surfaces of both end portions in the circumferential direction.   The vertical wall portion formed on the flat plate portion is recessed in a circumferential direction so that the bulging portion of the lid body and the vertical wall portion do not interfere with each other when the lid body is attached to the container. The lidded container according to claim 1, wherein the container is provided with a lid.   After mounting the lid body on the container, the lid body is rotated with respect to the container, and the upper end of the vertical wall portion formed on the flat plate portion is pressed below the middle portion of the bulging portion The container with a lid according to any one of claims 1 to 3, wherein the container is closed by the lid by being submerged in.   5. A portion of a vertical wall portion formed on the flat plate portion extends outward to form a protruding piece, and a protruding portion is formed on the protruding piece. The container with a lid | cover as described in any one.   The opening flange portion of the container is formed with a wide portion that can accommodate the protruding piece when the lid body is attached to the container and the opening flange portion and the flat plate portion of the lid contact each other. The container with a lid according to claim 5, wherein the container is a lid.

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