JPH0767769A - Hot insulating pot - Google Patents

Abstract

PURPOSE:To obtain a sufficient mounting strength of a cover packing, using a cover packing produced by extrusion molding. CONSTITUTION:The upper surface opening of a container 4 is directly covered with a cover underside board 24. An interference space is formed between this cover lower underside board 24 and a cover frame 23. A cover packing 33 with a uniform section is formed by extrusion molding. Also, a fixing portion 35 of the cover packing 33 is provided outside the interference space. The thickness of the fixing portion 35 is formed to be greater than the width of the interference space 1. Thus, even if the cover packing 33 is pulled by mistake, the fixing portion would be caught in the space, thereby preventing the cover packing from getting off outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker-combined heat-retaining pot having a structure in which an upper opening of a container is directly covered by a lower plate of a lid, so-called an inner lid is eliminated.

[0002]

2. Description of the Related Art Conventionally, a lid packing that comes into contact with the upper surface of a container used in this type of heat-retaining pot is usually extruded in order to simplify the molding process, prevent material loss, and simplify the manufacturing process. An extruded product formed by molding and having the same cross section is cut into pieces each having a predetermined length, and both ends of the cut surface are joined together to obtain an annular lid packing. On the other hand, in order to improve the aesthetics and cleanability of the lower surface of the lid, there has been conventionally known a type of heat retaining pot in which an inner lid is not interposed between the lid and the container. It has a structure that directly covers the upper surface opening portion. Then, a lid frame is arranged on the lower outer peripheral portion of the lid lower surface plate, a tightening space is formed between the lid lower surface plate and the lid frame on the inner peripheral side of the lid frame, and a horizontal portion of the lid packing is formed. The lid lower surface plate and the lid frame are attached and fixed to the outside of the lid packing via a screw or the like while being held in the interference space.

[0003]

Conventionally, the lid packing obtained by extrusion molding has advantages that it can be easily molded and that there is no waste of material, but on the other hand, it is impossible to obtain a shape other than the same cross section. It is not possible to partially form a member for attachment or to provide a hole for screwing, and as a result, there is a drawback that the attachment strength to the lid frame or the lid lower plate is weakened. In particular, in the above-mentioned type of heat retaining pot without an inner lid, the lid packing is directly exposed from the lower surface of the lid, and therefore the lid packing is likely to be pulled by hand during cleaning, and further improvement in mounting strength is desired.

In view of the above problems, the present invention eliminates the need for a mounting member, a screwing hole, or the like in the lid packing.
It is an object of the present invention to provide a heat-retaining kettle capable of obtaining a sufficient attachment strength of a lid packing.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a container, a lower lid plate that covers an upper opening of the container, a lid frame disposed on the lower outer peripheral portion of the lower lid plate, and the lid frame. An interference space formed between the lid bottom plate and the lid frame on the inner peripheral side of the,
A heat retaining pot having an annular lid packing held in the interference space and abutting against the upper surface of the container, and the lid lower surface plate and the lid frame being attached and fixed to the outside of the lid packing. The wall thickness of the fixing portion of the lid packing provided outside the interference space is formed to be larger than that of the interference space.

[0006]

Since the thickness of the fixing portion is formed to be larger than the width of the interference space, even if the lower side of the lid packing exposed between the lid frame and the lid lower surface plate is unexpectedly pulled during cleaning or the like. The fixing portion is caught in the narrow interference space, so that the entire lid packing cannot be pulled out to the outside.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Reference numeral 1 denotes a container body whose upper surface is opened, and this container body 1 is composed of an inner frame 2 as a container accommodating portion and an outer frame 3 made of plastic. Reference numeral 4 denotes a bottomed cylindrical container that is removably housed in the inner frame 2 and is composed of a member having good thermal conductivity such as aluminum. A substantially flat convex portion 5 is formed at the center of the bottom surface of the container 4, and a thermistor 7 as a container temperature detecting means is incorporated so that the outer bottom portion of the convex portion 5 is pressed by the elastic force of the spring 6. A plate 8 is provided in the inner frame 2.

Reference numeral 9 denotes a heat-conductive aluminum plate provided on the bottom of the inner frame 2, and is arranged so as to contact the outer peripheral portion of the container 4 when the container 4 is stored. Also, a plate support is provided below the plate 9.
10 is provided, and the plate 6 is biased upward, that is, toward the container 4 side by the spring 6A provided on the upper portion of the support plate 11.

A heating space 12 is formed below the plate 9 and between the inner frame 2 and the heating space 12.
A radiant heating type heater 13 composed of a sheathed heater is provided in a non-contact state with the plate 9. The heater 13 is composed of a stainless steel pipe provided with a heating wire (not shown). Further, 14 is a body heater provided on the outer side of the inner frame 2, 15 is a heat insulating material provided between the inner frame 2 and the outer frame 3, 16
Is a frame body that constitutes the upper part of the container body 1 and connects the inner frame 2 and the outer frame 3. Further, 17 is a heater installation base for mounting and fixing the heater 13.

Reference numeral 21 is a lid for covering the upper opening of the container body 1 so as to be openable and closable. The lid body 21 is made of ABS resin and forms an outer shell of the lid body 21, a lid frame 23 provided along the lower outer periphery of the outer lid 22, and a space below the outer lid 22. The lower plate of the lid attached so as to cover the upper opening of the container 4.
It consists of 24. Further, a lid heater 25 for heating the lid lower surface plate 24 during rice cooking is provided on the upper surface of the lid lower surface plate 24, and a lid sensor 26 for detecting the temperature of the lid lower surface plate 24 is provided. The lid lower surface plate 24 is formed by anodizing the surface of an aluminum plate, and the lid frame 23 is arranged below the folded portion 27 formed on the outer peripheral portion. A bending piece 28 having a substantially L-shaped cross section is formed on the inner peripheral side of the lid frame 23, and
A mounting seat 29 is formed on the outer peripheral side of the bent piece 28. The folded-back portion 27 of the lid lower surface plate 24 abuts on the upper end of the mounting seat 29, and the lid frame 23 and the lid lower surface plate 24 can be mounted and fixed by 4 to 8 screws 30, but the upper end of the mounting seat 29 Is higher than the upper end of the bent piece 28, so the lid frame
An interference space 31 is formed between the folded-back portion 27 and the upper end surface of the bent piece 28 on the inner peripheral side of 23. Further, a locking piece 32 is formed on the lower end of the outer periphery of the lid frame 23, and the locking piece 32 is attached to the outer lid 22.
The lid frame 23 can be attached and fixed to the outer lid 22 by being fitted into the lower end of the.

Reference numeral 33 denotes an annular lid packing having the same shape in cross section, which is obtained by extruding silicone rubber, cutting the molded product into a predetermined length, and joining both ends of the cut surface. At the upper end of the lid packing 33, a rib-shaped tightening margin portion 34 that is sandwiched between the folded portion 27 of the lid lower surface plate 24 and the bent piece 28 of the lid frame 23 is formed. Then, as the lid frame 23 and the lid lower surface plate 24 are attached and fixed to the outside of the lid packing 33 by the screws 30, the tightening margin portion 34 is tightened between the folded portion 27 and the bent piece 28 and elastically deformed. As a result, the airtight portion 27 and the bent piece 28 are hermetically sealed and the lid packing 33 is attached and fixed. Further, a fixing portion 35 is formed at one end of the tightening margin portion 34 so as to be located outside the tightening margin space 31 to prevent slipping out. The cross-section thickness B of the fixing portion 35 is formed to have a dimension (B> A) larger than the width A of the interference space 31, and is exposed from the lid frame 23 and the lid lower surface plate 24 at the time of cleaning. Lid packing 33
Even if the lower side is suddenly pulled, the fixing portion 35 is caught in the narrow interference space 31, and the entire lid packing 33 cannot be pulled out to the outside.

On the other hand, at the other end of the interference portion 34, a base material portion 36 is formed along the inner side surface of the bent piece 28, and inside the base material portion 36, the lid frame 23 and the bottom of the lid are provided. Bryant ribs 37 are formed so as to cover the gap with the face plate 24 and also have a sealing action. Further, the lower side of the lid packing 33 is formed in a substantially V-shaped cross section, and an arm portion 38 inclined toward the outer peripheral side, and an abutting portion 39 abutting against the upper surface of the container 4 inclined toward the inner peripheral side,
It is composed of an arm portion 38 and a bent portion 40 that elastically deforms the contact portion 39. At the lower end of the bent portion 40,
Forming an end portion 41 having a thickness greater than that of
The end portion 41 prevents the contact portion 39 and the bent portion 40 from coming into close contact with each other when the lid packing 33 is bent, and prevents the sealing effect from being deteriorated. 42
Is a heat insulating plate that is attached and fixed together with the lid lower surface plate 24 by the screw 30, and 43 is a heat insulating material made of glass wool formed above the heat insulating plate 42. Further, 44 is a display operation unit provided on the upper surface of the outer lid 22.

As described above, according to the above-described embodiment, the container 4 is directly covered by the lid lower surface plate 24 without the inner lid, and the lid packing 33 is exposed from the lower surface of the lid body 21. Also, by forming the thickness of the fixed portion 35 of the lid packing 33 formed by extrusion molding to be larger than the width of the interference space 31, even if the lid packing 33 is accidentally pulled during cleaning, the width The fixed part 35 is caught in the narrow interference space 31,
It is possible to prevent the lid packing 33 from coming out. That is, it is possible to obtain sufficient attachment strength of the lid packing 33 without providing the lid packing 33 with an attaching member, a hole for screwing, or the like.

While the screw 30 is tightening the tightening portion 34 of the lid packing 33, the lid frame 23 and the lid lower surface plate 24 are attached and fixed to the outside of the lid packing 33 from above the lid lower surface plate 24. Since the screw 21 is screwed, the head of the screw 30 is not exposed on the lower surface of the lid 21, and the appearance can be kept good, and dirt can be prevented from adhering to the screw 30 during cleaning.

The present invention is not limited to the above embodiment, but various modifications can be made within the scope of the present invention. For example, if the shape of the lid packing is such that the thickness of the fixing portion is larger than the tightening space and has an annular shape that allows extrusion molding, consider the shapes of the lid and the container. , Can be appropriately modified.

[0016]

According to the present invention, a container, a lower lid plate that covers the upper opening of the container, a lid frame disposed on the lower outer peripheral portion of the lower lid plate, and an inner peripheral side of the lid frame. In the above, there is an interference space formed between the lid bottom plate and the lid frame, and an annular lid packing held in the interference space and abutting the upper surface of the container. In the heat insulation pot in which the lid lower surface plate and the lid frame are fixedly attached, the wall thickness of the fixing portion of the lid packing provided outside the tightening margin space is made larger than the tightening margin space. Thus, it is possible to provide a heat retaining kettle capable of obtaining sufficient attachment strength of the lid packing without providing the lid packing with an attaching member or a hole for screwing.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a rice cooker showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the same.

[Explanation of symbols]

 4 Container 23 Lid frame 24 Lid bottom plate 31 Tightening space 33 Lid packing 35 Fixed part

Claims (1)

[Claims] 1. A container, a lid lower surface plate that covers an upper opening of the container, a lid frame disposed on a lower outer peripheral portion of the lid lower surface plate, and a lid lower portion on an inner peripheral side of the lid frame. A tightening margin space formed between the face plate and the lid frame, and an annular lid packing held in the tightening margin space and abutting the upper surface of the container,
In a heat retaining pot in which the lid lower plate and the lid frame are attached and fixed to the outside of the lid packing, the thickness of the fixing portion of the lid packing provided outside the tightening margin space is set to be larger than that of the tightening margin space. Insulation pot characterized by being formed large.