JPH0240903Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a bottom body fixing device for a cooking appliance used in general households.

BACKGROUND TECHNOLOGY A conventional bottom body fixing device of this type of cooker is disclosed in Japanese Utility Model Application Publication No. 56-6323, for example.
The structure was as shown in Figures 6 and 7. That is, as shown in the figure, a synthetic resin bottom body 2 attached to the bottom of a cylindrical body 1 made of a metal plate has a bottomed cylindrical shape and has a plurality of vertical grooves 3 on the outer periphery. , and has a locking claw 4 having an elastic force above the bottom body projecting outward, and the locking claw 4 is elastically fitted onto a bent portion 1a on the inner circumference of the bottom of the body 1. Fixation devices were common.

Problems that the invention aims to solve However, with this type of structure, when the shape of the body 1 becomes square, the four sides do not line up well. That is, when fitting a substantially square-shaped body and a substantially square-shaped bottom body as shown in FIG. This is because the joint is overlapping at ~3 degrees, so even if the seam part is processed into a flat surface, it is often easily deformed by external force or the like.
Further, when welding or lining the folded portion to increase its strength, this not only affects the appearance but also increases the number of parts, causing problems in ease of assembly and workability.

In addition, since the bottom body is made of synthetic resin, its external dimensions change depending on summer and winter, but since the body is made of metal, there is almost no change due to temperature. Strains such as expansion accumulate on the sides, creating steps, which pose a risk of falling off due to the appearance or when the main unit is dropped individually.

In view of the above-mentioned problems, the present invention allows for the assembly of rectangular objects in the same process as the current process of assembling round-type bodies and bottom plates, without increasing the number of parts, and without being affected by the outside temperature. The object of the present invention is to provide a bottom body fixing device for a cooking appliance.

Means for Solving the Problems In order to solve the above problems, the present invention provides an annular protrusion provided on the inner periphery of the lower end of the body made of a substantially rectangular metal plate;
A locking pawl provided on a bottomed, substantially rectangular cylindrical bottom body made of synthetic resin is fitted by the elastic force of the resin, and a locking pawl of the body is fitted between a protrusion provided on the side of the bottom body and the locking pawl. It is configured so that an annular protrusion provided on the inner periphery of the lower end is clamped.

According to the above configuration, the annular protrusion provided on the inner periphery of the lower end of the body is clamped between the protrusion provided on the side of the bottom body and the locking claw provided on the bottom body. Therefore, when the temperature rises in the summer, the bottom body expands and fits tightly to the inner circumference of the lower end of the body, and when the temperature drops in the winter, the bottom body contracts, but the protrusion fits around the outer circumference of the annular ridge on the body. Since they are in contact with each other, there is no step difference between the fitting portion of the bottom body and the body, and as a result, even when the bottom body contracts and expands, it is possible to maintain a constant fitted state with the body.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings. In FIG. 1, 21 is a substantially rectangular body made of a metal plate. Reference numeral 21a is a joint of metal plates forming the body 21. This state is shown in FIG. This matching portion 21a is located near the center of the plane side of the body 21, as shown in FIG.
Reference numeral 22 denotes an annular protrusion provided on the inner periphery of the lower end of the body 21. Reference numeral 23 designates a bottom body made of synthetic resin, and this bottom body 23 has a container-shaped bottom, and has an upwardly extending portion that abuts the lower end of the body 21, which has a substantially rectangular cylindrical shape and has the annular protrusion 22 at the upper end of the peripheral wall. The abutting step portion 23a and this step portion 23
An inner periphery fitting rib 23b is formed rising from a to fit with the inner periphery of the lower end of the body 21. Reference numeral 24 denotes a locking claw that projects outward from the inner circumferential fitting rib 23b and has an elastic force.
When the inner periphery fitting rib 23b and the lower inner periphery of the body 21 are fitted together, the free end locking portion 24a
is elastically engaged with an annular protrusion 22 provided on the inner periphery of the lower end of the barrel 21. Further, a protrusion 25 is provided on the side of the bottom body 23 and comes into contact with the outer periphery of an annular protrusion 22 provided on the inner periphery of the lower end of the body 21 . The protrusion 22 is clamped.

In FIG. 2, 27 is a lid that covers the top surface of the cooker, 28 is a pot for storing food, 29 is a frame on which the pot 28 is placed, and 30 is a bottom plate that covers the bottom surface of the bottom body 23.

The annular protrusion 22 provided on the inner periphery of the lower end of the body 21 is provided to increase the strength, and since the body 21 is made of a single metal plate into a cylindrical shape, the joining part 21a is It is located on a substantially flat surface of the body 21. In addition, the bottom body 23 has an annular protrusion 22.
A recessed portion is formed for fitting, and this recessed portion is formed by the protrusion 25 and the inner peripheral fitting rib 23b.

As is clear from the above structure, since the annular protrusion 22 provided on the inner periphery of the lower end of the shell 21 fits into the recess on the upper surface of the bottom body 23, the protrusion 25 remains intact even when subjected to thermal expansion and contraction. It comes into contact with the inner peripheral fitting rib 23b, and therefore the stress is absorbed by the metal annular protrusion 22. Therefore, the free end locking portion 24a of the locking pawl 24 is always connected to the annular protrusion 24.
2 and thus the body 21 and the bottom body 23
It will never come off. Further, the joint portion 21a of the body 21 is also attached to the bottom body 21 by the action of the protrusion 25.
It will no longer protrude beyond the outer circumferential surface of.

Next, another embodiment of the present invention will be described. FIG. 4 shows another embodiment, in which the protrusion 25 is replaced by a receiving portion 30 for locking a yawning holder into which a yamweed is placed. The upper end of this receiving portion 30 is open, and a U-shaped groove 30a is provided from the upper surface of the outer periphery. A conventional shiyamoji holder fits into this groove 30a.

To briefly explain the technology of the conventional shiyamoji receiving part, in Figs. 8 and 9, 10 is the main body of the cooker, 11 is a lid body that covers the top surface of the main body 10, and 12 is a cover, which is attached to the side. The main body 10 has a U-shaped hole 12a.
is fixed to the side of the Reference numeral 13 denotes a holder with a T-shaped protrusion 13a formed on the side surface. The T-shaped protrusion 13a is configured to engage with and disengage from the U-shaped hole 12a. 14 is Shiyamoji.

Effects of the invention As described above, according to the invention, an annular protrusion provided on the inner periphery of the lower end of the body made of a substantially rectangular metal plate, and a lock provided on the bottom body made of synthetic resin and having a substantially rectangular cylindrical shape with a bottom. The claws are fitted together by the elastic force of the resin, and an annular protrusion provided on the inner periphery of the lower end of the body is clamped between the protrusion provided on the side of the bottom body and the locking claw. Because
Even when the synthetic resin bottom body contracts and expands due to changes in temperature, it can maintain a constant state of engagement with the body.
As a result, when the cooker falls, the body and bottom body will not come apart, and since the body is made of a substantially rectangular metal plate, there will be a butt part between the metal plates. Since it is clamped between the protrusion and the locking pawl, the strength of this abutting part is not required, and as a result, it is not necessary to perform processing that affects the appearance, such as welding or lining, on this abutting part. Therefore, the process can be organized using existing automatic machines.

[Brief explanation of the drawing]

Fig. 1 is an enlarged perspective view of essential parts of a bottom body fixing device of a cooking appliance showing an embodiment of the present invention, Fig. 2 is an exploded perspective view of the bottom body fixing device of the same cooking appliance, and Fig. 3 is an exploded perspective view of the bottom body fixing device of the same cooking appliance. FIG. 4 is an enlarged perspective view of the main part of the bottom fixing device of the cooking device showing another embodiment of the present invention, and FIG. 6 is a perspective view of a conventional bottom body fixing device, FIG. 7 is a sectional view of the same essential part, FIG. FIG. 9 is a partial sectional view of the same Yamoji receiving part. 21... Trunk, 22... Annular projection, 23... Bottom body, 23a... Contact step, 23b... Inner periphery fitting rib, 24... Locking claw, 24a... Locking portion, 25 …
…protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A substantially rectangular metal plate cylinder having an annular protrusion on the inner periphery of its lower end, and an upward abutting member having a substantially rectangular cylindrical shape with a bottom and abutting the lower end of the cylinder at the upper end of its peripheral wall. a synthetic resin bottom body formed with a stepped portion and an inner circumferential fitting rib that rises from the stepped portion and fits with the inner periphery of the lower end of the body; A locking pawl having force is fitted into the inner peripheral fitting rib and the inner periphery of the lower end of the body, and the free end locking portion of the locking pawl is elastically engaged with an annular protrusion on the inner periphery of the lower end of the body. and a protrusion formed on the side of the bottom body that comes into contact with the outer periphery of the annular protrusion of the body when the annular protrusion is engaged, and the annular protrusion is clamped between the locking pawl and the protrusion. A device for fixing the bottom body of a cooking device. (2) The bottom body fixing device for a cooking utensil according to claim 1, wherein the protrusion has a receiving portion on its surface into which a Yamoji holder is inserted.