JPS5833932Y2 - Connection device between the metal plate body and the bottom of the gear exterior case - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a coupling device for coupling the metal plate body and the bottom of an exterior case for jars for keeping warm, cooking rice, and keeping warm.

The outer case of these jars is generally built into a body in order to facilitate the work of integrating heat retention and rice-cooking heaters, their various control elements, and insulation materials between the inner case and the inner case. Conventionally, as shown in FIGS. 1 and 2, the body A made of metal plate and the bottom B made of resin are combined.

In Fig. 1, the lower end of the barrel A is fitted into the upper outer circumferential stepped portion C of the bottom B, and these circumferential wall fitting portions are fixed with screws D.
Exposed screws D on the outer surface of the outer case deteriorate the appearance.

In Fig. 2, an annular groove E is formed all around the upper end of the bottom B, and the body A
A part of the inner case F and the bottom B are connected by a screw H from the bottom side of the bottom B via a connecting fitting G.

In this case, the screw H is located on the bottom surface and does not deteriorate the appearance, but the rotation between the body A and the bottom B can only be prevented by the connection between the inner case F and the bottom B. The connection part easily twists or wobbles, so it does not have a sufficient rotation prevention effect, and the fitting between the body A and the bottom B may be misaligned to some extent due to the molding accuracy of the fitting part. .

Therefore, a certain degree of misalignment of the body A and the bottom B is unavoidable, even though it is undesirable, and it is also easy to shake if screws or the like become loose or deformed due to molding errors or being dropped or hit hard against other objects. Even when using a synthetic resin bottom that can be relatively easily formed into the required shape for joining with the body A, the joining structure is still not fully satisfactory as described above, and in order to cope with today's soaring prices of resin materials, the bottom When B is made of a metal plate, it is desirable to propose a joint structure that takes into consideration ease of molding.

This invention provides a device for connecting the metal plate body and the bottom of an outer case for jars, which can be easily formed not only with a plastic bottom but also with a metal bottom, and which can eliminate the above-mentioned conventional drawbacks. The purpose is to provide

Describing the embodiment shown in Figure 3.4.5,
The figure shows an example of an electronic rice cooker that cooks rice and keeps it warm. 1 is the container body, 2 is the container lid, 3 is the rice bowl housed in the container body 1, and 4 is the rice bowl lid. .

The container body 1 has an outer case 7 that combines a body 5 made of a metal plate such as an iron plate or a stainless steel plate with a container formation 6 made of a similar metal plate, and an inner case 8 made of a metal plate at their openings. The inner case 8 has a heating plate 11 with a built-in rice cooking heater 10 on the bottom, an upper heater 12 on the upper outer periphery of the inner case 8, and a container lid 2. A lid heater 13 is provided inside the interior, and a TRT element 14 is provided as a control element for the heaters 10, 12, 13.
A temperature fuse 15, a thermal automatic rice cooking/warming switching means 16, a switch operation lever 17 connected thereto, etc. are arranged in the hollow wall of the container 1, and the container 1 and the container lid 2 are provided with heat insulation. Materials 18 and 19 are filled.

The rice cooker lid 4 includes a regulating means 20 for regulating the pressure inside the rice cooker 3 by releasing steam generated inside the rice cooker 3 to the outside under certain limits during rice cooking.
is provided so as to face the outside through a through hole 21 of the container lid 2, and the means 20 is provided with a valve 2 that closes the steam release path when not receiving steam pressure, that is, in a heat-retaining state, and prevents heat radiation through the means 20.
It has 2.

The temperature fuse 15 is attached to a mounting bracket 25 that is attached by screws 24 to the outer surface covered by the removable operation surface/plate 23 of the body 5, and is inserted into the body 1 through a window 26 opened in the body 5.
It is inserted into a desired location within the hollow wall and can be replaced by attaching and detaching the face plate 23 and metal fittings 25.

The body 5 and bottom 6 of the outer case 7 are connected as follows.

That is, an inward flange 6b is provided at the upper end of the peripheral wall 6a of the bottom 6 to form an inclined receiving surface 27 having an inward downward slope.
An inward flange that comes into close contact with the receiving surface 27 is also formed at the lower end of the body 5 to form a receiving portion 28 that is received on the receiving surface 27;
Engagement protrusions 29 that protrude downward are formed on the receiving portion 28 at a plurality of locations on the circumference, and the engagement protrusions 29 are engaged with the inclined receiving surface 27 to form a body. 5 and the bottom 6 are bored to form a locking engagement portion 30,
A part of the inner case 8 and the bottom 6C of the bottom 6 are connected.

The positioning engagement part 30 is provided on the flange 6b, and the connection between the inner case 8 and the bottom 6 is achieved by a connecting fitting 3 whose upper end 31a is attached near the bottom of the inner case 8 with a helical 32.
1 and the bottom 6C of the bottom 6 are fastened together using screws 33 inserted from below the bottom 6C.

Therefore, since the screws 33 are located on the bottom surface of the outer case 7 and cannot be seen, the appearance does not deteriorate.

A heat shield plate 37 between the inner case 8 and the bottom 6 is attached to the connecting fitting 31 by means of a support piece 31C raised from a part thereof.

Due to its inclination, the inclined receiving surface 27 not only guides the lower end of the torso 5 to a proper position when the torso 5 is placed on the bottom 6, but also suppresses the lateral movement of the torso 5 after being placed. It also plays a stabilizing role.

When the body 5 is placed on the bottom 6, the engagement protrusion 29 engages with the positioning and retaining portion 30, so that the body 5 is prevented from rotating relative to the bottom 6 and is prevented from shifting. The engagement protrusion 29 is prevented by the connection between the inner case 8 and the bottom 6.
If the engagement with the engaging portion 30 is maintained and the screw 33 is removed,
The bottom 6 can be easily removed for internal repair.

The flange 6b of the above embodiment may be discontinuous and formed only in the portion where the positioning engagement part 30 is provided as shown in FIG. 6, and the engagement part 30 may also be formed as shown in FIG.

As shown in Fig. 8, an appropriate notch other than a hole may be used.

In this case, its formation is simplified.

In addition, in order to raise the engagement protrusion 29 from the receiving portion 28,
By forming a window as shown in FIG. 9, the strength of the engaging protrusion 29 and the portion of the body 5 from which it is protruded can be increased.

Furthermore, as shown in FIG. 10, a barbed stopper piece 34 is formed on a part of the engaging protrusion 29, so that when the engaging protrusion 29 is inserted into the engaging part 310, the stopper piece 34
The projecting piece 29 can be secured to the opposite side of insertion to prevent removal.

In this case, the body 5 and the bottom 6 can be integrated with a certain degree of bonding force at the same time as the protruding piece 29 is inserted into the engaging portion 30, which facilitates the work of connecting the inner case 8 and the bottom 6.

By increasing the strength of the flange 6b, the protruding piece 29, and the stopper piece 34, the connection between the inner case 8 and the bottom 6 can be omitted.

The shape and formation of the lower end receiving portion 28 of the body 5 may be arbitrary, and may be, for example, a hemline portion.

The connecting screws 33 are also used to attach the bottom plate 35 of the bottom 6, and the legs 36 attached to the bottom 6 are also press-molded products made of metal plates to cope with the rising price of resin.
The upper end mounting piece 36a of the bottom 6 is inserted from below the bottom part 6C of the bottom 6, and the mounting piece 36a is prevented from being removed by a burred stopper piece 37 formed on the mounting piece 36a.

According to this invention, when the receiving part at the lower end of the body is placed on the inclined receiving surface at the upper end of the bottom circumferential wall while being guided by the inclined receiving surface at the upper end of the bottom circumferential wall, the inner case is Since the body and the bottom can be connected simply by connecting the body and the bottom, positioning and rotation prevention of the body and the bottom are reliably achieved by the engagement of the engaging protrusion and the engaging portion, and the inner case and The connection with the bottom can be made by simply maintaining the engagement, so there is no need to worry about misalignment like in the past.
It will not rotate and cause early rattling.

In addition, the structure and external shape of the connecting portion are simple, and the bottom can be formed easily and easily as a metal plate.

[Brief explanation of drawings]

Figures 1 and 2 are partial cross-sectional views showing conventional devices, respectively;
Fig. 3 is a sectional view showing an embodiment of this invention, Fig. 4 is a partially enlarged sectional view, Fig. 5 is a partially plan view, Figs.
8 is a plan view and a perspective view showing a modified example of each part, FIG. 9 is a sectional view showing another modified example, and FIG. 10 is a sectional view showing another embodiment. 1... Body, 5... Torso, 6...
・Bottom, 6a...Peripheral wall, 6b...Inward flange, 6C...Bottom, 7...Outer case, 8...Inner case , 27... Inclined receiving surface, 28... Receiving portion, 29... Engaging protrusion, 30... Positioning engaging portion, 31 ...
...Connection fittings.

Claims (5)

[Scope of utility model registration request] (1) Jars in which the outer case connected to the inner case at the upper end is a combination of a metal plate body and a bottom, and the bottom has an inward downward slope at the upper end of the peripheral wall that receives the body. The lower end receiving portion of the cylinder that is received on the inclined receiving surface is provided with engaging protrusions projecting downward at a plurality of locations on the circumference; The inclined receiving surface at the upper end of the bottom circumferential wall is formed with a notch and a positioning engagement portion for positioning the body and the bottom by engaging the engagement protrusion. A connecting device for connecting a bottom and a metal plate body of an outer case for jars, which connects the bottom of the bottom and the bottom of the bottom. (2) The bottom is made of a metal plate, and the inward flange at the upper end of the peripheral wall forms an inclined receiving surface. Coupling device. (3) The receiving part of the shell is composed of an inward flange at the lower end, has the same slope as the inclined receiving surface, and is integrally formed by raising an engaging protrusion. A device for connecting a metal plate body and a bottom of an outer case for jars according to item 1. (4) The inner case and the bottom of the bottom are connected by fastening the lower end of the connecting metal fitting whose upper end is attached to a part of the inner case and the bottom of the bottom using screws inserted from below the bottom. A device for connecting a metal plate body and a bottom of an outer case for jars according to any one of claims 1 to 3, which has been registered as a utility model. (5) The connecting fittings are connected to the metal plate body and bottom of the outer case for jars according to claim 4, wherein the connecting fitting also serves as a mounting member for a heat shield plate provided between the inner and outer case bottoms. coupling device.