JP2005334062A - Closed end cover structure for vacuum double container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a closed end cover structure for a vacuum double container capable of preventing a cover member from being detached from the vacuum double container at the time of fitting a metallic cover member for covering the closed end face of the vacuum double container to the outer peripheral wall of the closed end face. <P>SOLUTION: By providing a projected line 20 in a peripheral direction on the outer peripheral wall 15 of the closed end face of a heat insulation lid 3 constituted of the vacuum double container and forcibly fitting the metallic cover member 16 for covering the closed end face to the outer peripheral wall 15 over the projected line, the peripheral wall 19 of the cover member 16 is raised and a part over the projected line 20 is deformed inwards. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a closed end cover structure for a vacuum double container in which a metal cover member that covers the closed end face of a vacuum double container is fitted to the outer peripheral wall of the closed end face.

  2. Description of the Related Art Conventionally, as a food heat insulation box used for a meal service or the like, an outer shell is formed by a vacuum double container having high heat retention performance. For example, when a vacuum double container is used, it is usually formed into a cylindrical shape with one end open and the other end closed, and the open end is covered with a heat insulating lid to form the outer shell of the food heat insulating box. And, for convenience of putting in and out food containers such as rice bowl and soup bowl stored inside, support frames are attached to the open end and closed end of the vacuum double container so that the vacuum double container can be used in a laid state. The vacuum double container in a state is supported by both support frames, and the drawer plate is taken in and out from the side opening (Patent Document 1).

JP 2000-152882 A (see FIGS. 1 and 2)

  However, this type of food warming box is often used for feeding the elderly and the sick who are difficult to prepare meals, but in the case of a drawer type like the food warming box of Patent Document 1. Since it is necessary to put out and put in two food containers on the drawer plate, inconveniences such as the food container falling over and spilling the food in the interior easily occurred, and there was a problem in handling .

  Therefore, as shown in FIG. 4, the applicant stores two types of food containers 42, 43 on the box bottom body 41, and a food in which a heat insulating lid 44 placed on these is coupled to the box bottom body 41. A heat insulation box 45 has been proposed (see Japanese Patent Application No. 2003-162586). In this food insulation box 45, food containers 42, 43 are stored in two upper and lower layers on the upper surface of the box bottom body 41, and a heat insulation lid 44 is opened at the lower end and closed at the upper end to cover the two layers of food containers 42, 43. It is formed by a cylindrical vacuum double container. A cover member 47 made of a stainless steel plate is attached to the outer peripheral wall 46 of the closed end face of the heat retaining lid 44 in order to conceal the tip tube portion provided at the center of the closed end face. The cover member 47 has a peripheral wall 48 having a smaller diameter than the outer peripheral wall 46 of the closed end face, and is forcedly fitted by pushing the peripheral wall 48 into the outer peripheral wall 46 from the closed end face side.

  However, in the food heat insulation box 45, a grip 49 for transportation is fixed to the cover member 47, and various loads are applied to the cover member 47 during transportation. However, in the closed end cover structure of the food heat insulation box 45, the cover member 47 and the heat insulation lid 44 are merely in an interference fit state between the flat surfaces. If the fitting is loosened due to the weight or the weight exceeds the assumed condition, the cover member 47 may come off.

  Therefore, the present invention provides a vacuum that prevents the cover member from coming out of the vacuum double container when a metal cover member that covers the closed end face of the vacuum double container is fitted to the outer peripheral wall of the closed end face. It is an object of the present invention to provide a closed end cover structure for a double container.

  As means for solving the above-mentioned problems, the present invention provides a closed cover for a vacuum double container in which a metal cover member covering the closed end face of the vacuum double container is fitted to the outer peripheral wall of the closed end face. The structure is provided with a circumferential ridge on the outer peripheral wall of the closed end surface, and the cover member is forcedly fitted to the outer peripheral wall over the ridge, thereby raising the peripheral wall of the cover member, and The part beyond the ridge was deformed inward.

  According to the said structure, in the state in which the said surrounding wall was fitted by the outer peripheral wall of the said vacuum double container, a part of said surrounding wall will be pushed outward by the said protrusion, and will be in the state raised. In this state, even if the cover member tries to shift, the peripheral wall portion beyond the protrusion is deformed inward, so that this portion hits the protrusion and the movement of the cover member is hindered. The cover member is prevented from coming off from the vacuum double container.

  As described above, the present invention prevents the cover member from coming out of the vacuum double container when a metal cover member covering the closed end face of the vacuum double container is fitted to the outer peripheral wall of the closed end face. The closed structure of the closed end of the vacuum double container can be provided.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the invention will be described with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the food heat insulation box includes a box bottom body 1 and a heat insulation lid 3 that is placed on the box bottom body 1 and supported by a step 2 on the outer peripheral surface of the box bottom body 1.

  The box bottom body 1 is obtained by filling a bottom main body 4 with a heat insulating material 5 such as a foamed resin and closing the lower surface with a bottom plate 6. A hemispherical recess 7 is formed on the upper surface of the bottom body 4, and the step 2 is formed on the outer peripheral surface. Fasteners 8 and 8 are attached to two locations on the outer peripheral surface at symmetrical positions.

  The heat insulating lid 3 is constituted by a vacuum double container formed in a cylindrical shape with the lower end opened and the upper end closed, and the annular member 9 is integrated with the outer peripheral surface of the lower end opening by forced fitting. The stoppers 8 and 8 are engaged with the protrusions 10 and 10 provided at symmetrical positions on the outer peripheral surface of the annular member 9, and the box bottom body 1 and the heat insulating lid 3 are detachably connected. In addition, a recessed portion 11 that is recessed inward is formed in the central portion of the upper end surface of the heat insulating lid 3, and a cut end portion of the tip tube 12 used for evacuation is present in the central portion, and is covered by the tip tube cover 13. It has been broken. The tip tube cover 13 is filled with a sealing material 14 such as silicon sealant. A cover member 16 covering the closed end surface of the heat insulating lid 3 is fitted to the outer peripheral wall 15 constituting the outer periphery of the closed end surface of the heat insulating lid 3 with a sealing material such as silicon sealant interposed therebetween. The tip tube cover 13 is concealed by the cover member 16. A downward arcuate handle 17 is fixed to the upper surface of the cover member 16. The bottom plate 6 is provided with a circular recess 18 into which the handle 17 can be fitted so that they can be fitted to each other when stacked.

A specific closed end cover structure of the vacuum double container constituting the heat insulating lid 3 will be described.
As shown in FIGS. 3A and 3B, the entire cover member 16 is formed of a metal plate such as stainless steel, and a peripheral wall 19 that is fitted to the outer peripheral wall 15 from the closed end face side is provided. On the other hand, the outer peripheral wall 15 of the closed end face is provided with a ridge-line-like ridge 20 formed by bending the outer peripheral wall 15 over the entire circumference, and the peripheral wall 19 extends beyond the ridge 20. Is forcibly mated. The ridge 20 is formed by a diameter-increasing slope 20a that expands as the outer diameter of the outer peripheral wall 15 proceeds in the fitting direction, and a diameter-reduced slope 20b that decreases from the diameter-increasing slope 20a. Here, the enlarged diameter inclined surface 20a may be provided so that an inward inclination angle with respect to the peripheral wall 19 is less than 45 degrees. As a result, when the cover member 16 is fitted to the outer peripheral wall 15 of the heat insulating lid 3 from the closed end face side, the peripheral wall 19 becomes easy to slide on the enlarged diameter slope, and the cover member 16 is easily forced to be fitted.

  The outer diameter of the ridge line 21 of the ridge 20 is larger than the inner diameter of the peripheral wall 19. When the peripheral wall 19 of the cover member 16 is forcibly fitted until it exceeds the ridge line 21, it protrudes outward from the inner peripheral surface side by the ridge 20, and exceeds the ridge 20 at the boundary with the ridge line 21. The part is deformed inward.

  In the closed end cover structure described above, the protrusion 20 is pressed inward by the peripheral wall 19 when the cover member 16 is forcibly fitted. Therefore, in this embodiment, a structure is provided in which the ridge 20 is pushed back outward. Specifically, a U-shaped recess 22 along the outer peripheral wall 15 is provided on the closed end surface of the heat insulating lid 3, and the outer standing wall 23 of the U-shaped recess 22 has a skirt 24 on the diameter-inclined slope side of the ridge 20. Is provided. According to this structure, since the outer standing wall portion 23 has an inward / outward spring property, even if the ridge 20 is pressed inward, the ridge 20 is pushed outward by the outer standing wall portion 23 via the skirt 24. returned. Thereby, the protrusion 20 comes to stably push out the peripheral wall 19 of the cover member 16, and the cover member 16 becomes more difficult to be removed from the heat insulating lid 3.

  Further, in the closed end cover structure described above, a portion of the outer peripheral wall 15 of the closed end surface up to the middle of the enlarged diameter inclined surface 20 a is provided with a smaller diameter than the peripheral wall 19. Thereby, it becomes possible to fit the cover member 16 to the ridge line 21 vigorously from the outer periphery on the closed end face side, and the forced fitting to the ridge 20 becomes easy.

The longitudinal section front view of the closed end cover structure of the vacuum double container concerning an embodiment. The exploded perspective view same as the above. (A) An exploded sectional view showing a part of the above. (B) The elements on larger scale of the fitting state of a figure. The longitudinal section front view of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Box bottom body 2 Step part 3 Insulation cover 4 Bottom main body 5 Thermal insulation material 6 Bottom plate 7 Recess 8 Stop metal 9 Ring member 10 Protrusion 11 Recessed part 12 Tip tube 13 Tip tube cover 14 Sealing material 15 Outer wall 16 Cover member 17 Handle 18 Circular recess 19 Peripheral wall 20 Rib 20a Expanded slope 20b Reduced slope 21 Ridge line 22 U-shaped recess 23 Outer standing wall 24 Bottom

Claims (3)

  In the closed end cover structure of the vacuum double container, a metal cover member that covers the closed end face of the vacuum double container is fitted to the outer peripheral wall of the closed end face, and a circumferential protrusion on the outer peripheral wall of the closed end face The cover member is forcedly fitted to the outer peripheral wall over the ridge, so that the peripheral wall of the cover member is raised, and the portion beyond the ridge is deformed inward. A closed end cover structure for a vacuum double container.   The ridges are provided in a ridge formed by an enlarged slope having an outer diameter of the outer peripheral wall expanding and a reduced slope having a diameter reduced from the enlarged slope. 2. The closed end cover structure of the vacuum double container according to 1.   The closed end cover structure for a vacuum double container according to claim 2, wherein a part of the outer peripheral wall up to the middle of the enlarged slope is provided with a smaller diameter than the peripheral wall of the cover member.

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