JPS5926931Y2 - Bottom member attachment device to exterior case - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a bottom member attachment device for adding a bottom member to the lower end of an outer case of a pot, an electric jar, etc., and particularly an outer case made of a metal plate.

Conventionally, a bottom member has been added to this type of exterior case by force fitting or screwing.

However, in the case of forced fitting, it is difficult to remove the bottom member once it has been added, making repairs etc. inconvenient, and the bottom member and the exterior case may be damaged during use.

In addition, when screwed together, attachment and detachment is not as easy as force fitting, but it is not easy to do because the large-diameter bottom member must be rotated. Especially when they are attached to the bottom member, the rotation of the bottom member for attachment and detachment has a negative effect on the electrical equipment and its wiring.

The same applies to the internal screw threaded onto the bottom member to push up the inner container, and as shown in FIG. Case B
An inner bottom member E is provided between the inner container and the inner container E, and electric equipment such as a heater F and its control elements are installed between the inner container and the inner bottom member E, and are screwed onto the bottom member C. An application has been filed in which the inner container is pushed up through the inner bottom member E by the inner screw H that is connected to the inner container so that the inner container is not affected by the rotation of the inner screw H, but some of the electrical equipment and wiring are It has to be installed between E and the bottom member C, and it has to be attached to the ordinary bottom member C, and the influence of rotation by the bottom member C has not yet been eliminated.

Furthermore, the screwed bottom member C may become loose due to vibrations or shocks during handling, especially when the inner container is pushed up by the inner screw H as shown in Fig. 1. Looseness immediately causes the inner container to become loose, which is a problem, so as shown in Fig. When the screw I is screwed in and the button is pressed, its head is exposed to the outer circumferential surface of the outer case B, deteriorating the appearance.

The object of this invention is to provide a device for attaching a bottom member to an outer case that does not have the drawbacks of the prior art and those of the applicant's earlier application.

To explain the embodiment shown in FIGS. 2 to 4, a bottom member 3 made of synthetic resin is attached to an inward edge 2 which is bent in a hemlock shape at the lower end of an exterior case 1 made of a metal plate. An upward step 4 formed on the outer periphery of the upper surface 3a is fitted from below, and an annular bottom member mounting washer 5 is inserted into the exterior case 1.
is fitted, and the downwardly bent portion 5a of the outer periphery is inserted between the inner periphery of the outer case 1 and the upwardly rolled edge of the inner periphery of the inward edge 2 to be locked to the inward edge 2. .

The bottom member 3 has the stepped portion 4 on the upper surface 3a from the lower surface 3b.
Insert the set screw 6 inward and press the top surface 3a of the bottom member of the screw 6.
The tip portion protruding from the bottom member is screwed 7 into the bottom member mounting washer 5.

As a result, the bottom member 3 is fastened to a state in which the outer case inner mouth edge 2 which locks the bent portion 5a of the washer 5 is clamped between the washer 5 and the outer case. It is added to the case 1 via a washer 5.

Since the washer 5 is drawn downward with its bent portion 5a locked to the inner edge 2, it does not fall off from the outer case 1, and the stepped portion 4 is attached to the inner edge of the washer 5. Since the bottom member 3 engaged with the bottom member 2 is pulled upward and fastened, the bottom member 3 is firmly attached.

The tip of the bent portion 5a of the washer 5 is further bent inward, making it even more difficult to fall off.

As shown in Fig. 5, this bending of the tip can be done only on a portion of the tongue portion 9 formed by a pair of left and right notches 8, but the same effect can be achieved, the bending process is easy, and the inner opening It is also easy to fit between the edge 2 button and the inner circumferential surface of the exterior case 1.

It is easy to fit the washer 5 into the exterior case 1 before forming the inner mouth edge 2, but even after the inner mouth edge 2 is formed, the washer 5 can be fitted into the outer case 1 in some parts as shown in Fig. 6. If the open ring body is used as described above, sufficient elasticity will be utilized to facilitate fitting.

Further, a cut-out portion 11 is provided on a part of the outer circumference of the washer 5, and is engaged with a caulking connection portion 12 formed vertically as a protrusion on the inner circumferential surface of the outer case 1 to prevent rotation. .

As a result, the bottom member 3 is also prevented from rotating, and there is no rotational influence on the auxiliary electrical equipment.

As shown in FIG. 7, for example, a cut 13 is formed in a part of the inner mouth edge 2 of the outer case, and a protrusion 14 formed in a part of the step 4 of the bottom member 3 is fitted into the cut 13. The bottom member 3 may also be prevented from rotating.

In this case, due to the rotation of the washer 5 button and the bottom member 3,
The holes can be aligned when the locking screw 6 is fastened, making the work easier, and unnecessary rotation of the washer 5 and the bottom member 3 can be prevented, and loosening of the screw 6 can also be prevented.

The set screw 6 is inserted through an annular groove 15 formed on the lower surface 3b of the bottom member 3, and the head 6a is located in the groove 15 to prevent loosening due to contact or collision with other objects. Prevented.

If the spring washer 16 is provided, loosening of the screw 6 can be more reliably prevented.

A rotating seat ring may be provided on the lower surface of the bottom member 3 as required.

In the embodiment shown in FIG. 2, the inner screw 18 screwed 17 into the bottom member 3 pushes up the inner container 20 via the inner bottom member 19, as in the case of the applicant's previous application. This is done so that the rotation of the inner screw 18 does not affect the heater 21 and the like.

According to this invention, the bottom member is fitted with a bottom member mounting washer that is fitted into the outer case and received on the inner mouth edge of the lower end, and the bottom member has an upward step on the outer periphery fitted to the inner mouth edge. Since the bottom member is attached to the lower end of the exterior body with the washer and the bottom member clamped onto the inner opening edge by fastening with set screws, the installation is secure and there are several fasteners. The bottom member can be easily attached and detached by simply tightening or removing the screws.

In addition, there is no damage to the outer case or bottom member as would be the case with force-fitting, and the bottom member does not rotate and adversely affect attached electrical equipment as would occur when the bottom member is screwed on. Equipment can be installed easily and safely.

Since the locking screw is inserted from the lower surface of the bottom member, it exhibits various features such as its head is not exposed to the outer circumferential surface of the outer case and does not deteriorate the appearance.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of the applicant's earlier application;
The figure is a sectional view showing an embodiment of this invention, FIG. 3 is a sectional view of the main part, FIG. 4 is a slope view of the main part, FIG. 5 is a slope view showing a modification of the bottom member additional washer, and FIG. The figure is a perspective view showing another modified example of the bottom member additional washer, and FIG. 7 is a partial perspective view showing another embodiment. 1...Exterior case 2...Inner mouth edge,
3...Bottom member, 3a...Top surface, 3b.
...Bottom surface, 4...Upward step, 5...
...Bottom member additional washer, 5a...Downward bent part, 6...Set screw, 7...Threaded engagement, 9.
...Lingage segment, 10... Pro-eutectoid, 11...
... Notch part, 12 ... Caulking connection part, 13.
... cut, 14 ... protrusion, 21 ...
···heater.

Claims (5)

[Scope of utility model registration request] (1) Fit the upward step formed on the outer periphery of the top surface of the bottom member to the inward edge bent and formed at the lower end of the outer case made of a metal plate, and fit the upward step formed on the outer periphery of the top surface of the bottom member separately into the outer case to fit the inward edge. The bottom member mounting washer received on the bottom member and the bottom member are fastened with a set screw inserted from below, the inward edge portion is sandwiched between the bottom member and the bottom member mounting washer, and the bottom member is covered with an exterior. A bottom member attachment device to an exterior case, characterized in that it is added to the bottom end of the case. (2) The bottom member mounting washer is formed into a ring along with a downwardly bent portion on its outer periphery, and the bent portion is formed by further bending the entire cylinder or the tip portion of an appropriate number of points inward to form an inward edge. 71. A device for attaching a bottom member to an exterior case as set forth in claim 1. (3) The apparatus for attaching the bottom member to an exterior or case according to claim 2, wherein the bottom member attaching washer is an open ring body cut at one point. (4) In practical use, the bottom member mounting washer is prevented from rotating by engaging a notch formed at one location on its outer periphery with a caulking connection formed vertically as a protrusion on the inner peripheral surface of the outer case. A device for attaching a bottom member to an exterior case as claimed in claim 1. (5) The bottom member is configured such that a protrusion formed on a part of the stepped portion engages with a cut in the inward edge of the lower end of the outer case to prevent rotation. The device for attaching a bottom member to an exterior case according to any one of paragraph 4 above.