JP2004267261A - Heat insulating lid for cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase strength without increasing the plate thickness of an outer lid member and an inner lid member and to reduce weight while maintaining a heat insulating property in a heat insulating lid having a vacuum heat insulation layer. <P>SOLUTION: The heat insulating lid for a cooker is constituted so that an outer lid member 1 and an inner lid member 2 are vertically put together at a prescribed interval, the outer peripheral edges 3 are joined to each other, the vacuum heat insulation layer 20 is provided inside and a knob 21 is provided on the upper surface of the outer lid member 1. Then, a metallic reinforcing pipe 14 is interposed between the opposing surfaces of the outer lid member 1 and the inner lid member 2 and the reinforcing pipe 14 is provided with a ventilation hole 15. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heat retaining lid for a cooking appliance such as a cooking pot, and more particularly to a heat retaining lid having a vacuum heat insulating layer.
[0002]
[Prior art]
2. Description of the Related Art In a cooking device such as a pot used for various kinds of cooking, particularly in the case of cooking that places importance on heat retention, it has been conventionally used to provide a heat retention lid filled with a heat insulating material or a vacuum heat insulation layer and use a heat retention lid. Among them, a lid provided with a vacuum heat insulating layer generally has an outer lid member and an inner lid member which are vertically aligned at a predetermined interval, and the outer peripheral edges thereof are joined together and the inside thereof is evacuated to form a vacuum heat insulating layer. And a knob provided on the upper surface of the outer lid member (see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-10-179404 (Embodiment 1, FIG. 2)
[0004]
[Problems to be solved by the invention]
However, since the lid having the vacuum heat insulating layer as described above needs to have a strength capable of withstanding vacuum pressure as a metal material of the outer lid member and the inner lid member, a metal material plate is required. There has been a problem that the thickness is increased, the lid is heavier, the cost is increased, and handling is inconvenient.
[0005]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a heating lid for a cooking appliance which is reduced in weight while maintaining strength against vacuum pressure.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention has a metal outer lid member and an inner lid member which are vertically arranged at a predetermined interval, and their outer peripheral edges are joined together and a vacuum heat insulating layer is provided inside. In the heat retaining lid for a cooker, a configuration is adopted in which a metal reinforcing pipe is interposed between the facing surfaces of the outer lid member and the inner lid member, and a ventilation portion is provided in the reinforcing pipe. According to this configuration, since the inner lid member and the outer lid member are reinforced by the reinforcing pipe interposed therebetween, the thickness of the inner lid member and the outer lid member does not increase, and the weight of the lid is reduced. be able to.
[0007]
As the mounting structure of the reinforcing pipe, a circular convex portion provided with a vacuum exhaust unit is provided on the outer lid member, and an upper end portion of the reinforcing pipe is fitted on the circular convex rear surface, and an upper surface of the outer lid member is provided. By fitting the knob provided on the circular projection on the circular projection, the vacuum exhaust unit can be covered and hidden. According to this configuration, the vacuum exhaust portion is covered and hidden by the knob, so that a good appearance can be obtained.
[0008]
Also, a truncated conical raised portion is provided at the center of the inner lid member, and an annular step facing the circular convex portion is provided around the upper end surface of the raised portion, and the lower end of the reinforcing pipe is supported by the step. The configuration can be adopted. According to this configuration, there is an advantage that even if a trace of the lower end of the reinforcing pipe appears on the outer surface of the inner lid member, the trace is inconspicuous.
[0009]
Further, a getter is placed on the raised portion, and a metal foil for heat insulation interposed between the inner lid member and the outer lid member is placed on the getter, and a lower end of the reinforcing pipe and the step portion are provided. By sandwiching the metal foil, a configuration in which the metal foil is fixed and the getter is held can be adopted. According to this configuration, the metal foil is suppressed by the reinforcing pipe and its position is stabilized, and a special member (getter metal fitting) for holding the getter can be omitted.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, the heat retaining lid 10 of the embodiment is configured such that an outer lid member 1 and an inner lid member 2 made of stainless steel are vertically arranged at a predetermined interval, and their outer peripheral edges are joined to each other to form a peripheral portion 3. Is formed.
[0011]
The outer cover member 1 is provided with a circular convex portion 4 rising at a center portion thereof with a predetermined radius. The circular convex portion 4 is formed by a rising round portion 5, a cylindrical portion 6 thereon, and an upper end surface 7 of an upper end of the cylindrical portion 6. An evacuation pipe 8 compressed and cut is provided at the center of the upper end surface 7, and a cap 9 is put on the evacuation pipe 8.
[0012]
The inner lid member 2 has a gentle truncated conical raised portion 11 formed at the center thereof, and a circular portion 12 at the upper end faces the cylindrical portion 6 of the circular convex portion 4. A step 13 having a diameter equal to the inner diameter of the circular projection 4 is formed in an annular shape on the outer periphery of the circular part 12.
[0013]
The upper end of a metal reinforcing pipe 14 is fitted into the inner surface of the circular convex portion 4 of the outer lid member 1 so as to be inscribed in the cylindrical portion 6, and the upper end of the reinforcing pipe 14 projects to the lower surface of the upper end surface 7. Hit. The lower end of the reinforcing pipe 14 is placed on the step 13.
[0014]
The reinforcing pipe 14 is provided with a ventilation hole 15 for communicating the inside and the outside thereof. By providing a notch on the end face instead of the ventilation hole 15, the inside and outside may be communicated. At the time of evacuation, the air inside the reinforcing pipe 14 is exhausted to the outside through the ventilation holes 15 and the vents such as the notches, so that evacuation is not hindered.
[0015]
A metal foil 16 such as a copper foil for heat insulation is housed between the outer lid member 1 and the inner lid member 2, and a getter 17 for adsorbing residual gas after evacuation is formed in a circular portion of the inner lid member 2. 12 on the upper surface. The getter 17 is covered with a metal foil 16, and the metal foil 16 is sandwiched by the lower end of the reinforcing pipe 14 at the stepped portion 13, so that the getter 17 is held without using a special mounting bracket. At the same time, the metal foil 16 is also fixed and stabilized.
[0016]
The air in the space formed between the outer lid member 1 and the inner lid member 2 described above is exhausted through the above-described vacuum exhaust pipe 8, and a vacuum heat insulating layer 20 is formed inside. A vacuum pressure is applied to the outer lid member 1 and the inner lid member 2 by the evacuation, and the pressure is supported by the reinforcing pipe 14. The reinforcing pipe 14 is strongly pressed against the outer lid member 1 and the inner lid member 2 by the above-mentioned pressure, so that an indentation is generated, and the indentation may appear on the outer surface of each of the members 1 and 2. Anything that appears on the outer surface of the member 1 is concealed by the knob 18, so there is no problem. What appears on the lower surface of the inner lid member 2 occurs at the stepped portion 13, but it is difficult to distinguish the stepped portion 13 from the indentation, so that the indentation is less noticeable.
[0017]
On the other hand, a knob 18 having a cap shape is fitted to the circular convex portion 4 of the outer lid member 1 and fixed to the outer peripheral surface of the cylindrical portion 6 by welding. A rubber member 19 for preventing slippage is fitted on the outer peripheral surface of the knob 18, and a decorative plate 21 is fixed to the upper end surface thereof. The knob 18 has a function of covering the evacuation pipe 8 and its cap 9 as described above, in addition to the original function of gripping the knob and gripping the entire lid.
[0018]
The heat retaining lid 10 of the embodiment is as described above, and is used in combination with an appropriate cooking pot. 2 and 3 show an example of its use. In this case, it is used as a heat retaining lid 10 of a normal cooking pot 22. The cooking pot 22 is stored in a cylindrical warmer 23. The heat insulator 23 is provided with recesses 24, 24 at two locations on the upper edge thereof, and the handles 25, 25 of the cooking pot 22 are fitted into the recesses 24, 24. The brim portion 26 of the cooking pot 22 rests on the upper edge of the cooker 23 to be supported in a non-ground state (see FIG. 3). A heat insulating material 27 is housed inside the warmer 23.
[0019]
The outer peripheral surface of the cooking pot 22 is insulated by the above-described warmer 23, and the bottom surface of the cooking pot 22 is insulated by the air layer between the heater 22 and the installation stand. The upper surface of the cooking pot 23 is insulated by the heat retaining lid 10.
[0020]
【The invention's effect】
As described above, according to the present invention, heat insulation is provided by providing the vacuum heat insulating layer between the outer lid member and the inner lid member, and the reinforcing pipe is interposed between the two members, The thickness of both members can be made relatively thin, so that weight reduction and cost reduction can be achieved. Since the reinforcing pipe has a ventilation part, it does not hinder evacuation.
[0021]
In addition, a good-looking appearance can be obtained because the indentation at the lower end of the reinforcing pipe is inconspicuous, and the vacuum exhaust pipe is covered and hidden by a knob.
[Brief description of the drawings]
FIG. 1 is a sectional view of an embodiment; FIG. 2 is an exploded perspective view of the same in use; FIG. 3 is a cross-sectional view of the same in use;
DESCRIPTION OF SYMBOLS 1 Outer cover member 2 Inner cover member 3 Peripheral part 4 Circular convex part 5 Rising round part 6 Cylindrical part 7 Upper surface part 8 Vacuum exhaust pipe 9 Cap 10 Heat retention lid 11 Raised part 12 Circular part 13 Step part 14 Reinforcement pipe 15 Vent hole 16 Metal foil 17 Getter 18 Knob 19 Rubber member 20 Vacuum heat insulating layer 21 Decorative plate 22 Cooking pot 23 Insulator 24 Recess 25 Handle 26 Collar 27 Heat insulating material

Claims (4)

A metal outer lid member and an inner lid member are vertically arranged at a predetermined interval, their outer peripheral edges are joined to each other, and a vacuum heat insulating layer is provided inside, wherein the outer lid member and the inner lid are provided. A heat retaining lid for a cooker, wherein a metal reinforcing pipe is interposed between surfaces facing members, and a vent is provided in the reinforcing pipe. The outer cover member is provided with a circular convex portion provided with a vacuum exhaust unit, the upper end of the reinforcing pipe is fitted on the back surface of the circular convex portion, and the knob provided on the upper surface of the outer cover member is placed on the circular convex portion. 2. The heat retaining lid for a cooking appliance according to claim 1, wherein the vacuum exhaust unit is covered by being fitted to the lid. A truncated conical raised portion is provided at the center of the inner lid member, and an annular step facing the circular convex portion is provided on the outer periphery of the upper end surface of the raised portion, and the lower end of the reinforcing pipe is supported by the step. The heat retaining lid for a cooker according to claim 1 or 2, wherein: A getter is placed on the upper end surface of the raised portion, and a metal foil for heat insulation interposed between the inner lid member and the outer lid member is covered on the getter, and between the lower end of the reinforcing pipe and the step portion. The heat retaining lid for a cooker according to claim 3, wherein the getter is held while fixing the metal foil by sandwiching the metal foil.

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