JPH0433091Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a bottom mounting structure of a pot.

[Conventional technology]

The structure for attaching a bottom body to a conventional pot is such that a bottom ring is attached to the inner periphery of the lower end opening of the pot body, and the bottom body is attached to the inner periphery of the bottom ring by screw connection. However, since this mounting structure requires a bottom ring as an intermediate member, for example, as disclosed in Japanese Utility Model Publication No. 57-44918, this bottom ring is omitted and the bottom body is A structure that is directly attached to the inner periphery of the lower part of the fuselage is also known.

The bottom body mounting structure published in the above-mentioned publication is such that the peripheral edge of the lower end opening of the fuselage is bent inward in a U-shape to form a supporting ridge, and the lower end opening of the fuselage is pressed and deformed into an ellipse while the bottom body is attached. Attachment is accomplished by inserting the body, then releasing the pressure and drawing the base body onto the support flange.

A tightening body is screwed into the center of the bottom body, and the tightening body tightens the medium bottle inside the body, thereby applying a reaction force to the bottom body and pressing it against the supporting flange.

[Problem that the invention attempts to solve]

If the structure of attaching the bottom body to the lower opening of the body is adopted as in the above-mentioned publication, problems arise firstly with the structure of the supporting flange and secondly with the assembly process of deforming the body and inserting the bottom body. There is.

That is, as shown in FIG. 4A, the U-shaped support flange 8' is generally formed by pressing the lower end of the body 1' using a mold A and bending the lower edge. be done.

In this case, the rising height h′ of the curved part determines the standard support height of the bottom body, so
Dimensional accuracy of this height h' is strictly required. However, when processing with the above method, accurate dimensions cannot be obtained if the pressing force of the press is too large or too small. Therefore, in the latter half of molding, it is necessary to achieve dimensional accuracy by gradually reducing the pressing force while keeping an eye on the dimensions. Furthermore, since the stroke of the press is constant, the dimensional tolerance of the material appears as the difference in whether it exceeds or falls below the rising height h'.

For this reason, the conventional structure has the problems of low production efficiency and poor dimensional accuracy.

The second problem is that it is necessary to deform the body when inserting the bottom body. For this reason, the operator must work while paying attention to the amount of deformation so as not to cause dents or other scratches on the body, and if sufficient consideration is not given, scratches may occur.

The purpose of this invention is to solve the above-mentioned problems caused by the prior art and to realize a bottom mounting structure with good productivity and dimensional accuracy.

[Means for solving problems]

In order to solve the above problems, this invention forms a supporting ridge on the inner periphery of the opening at the lower end of the pot body,
Installation of a pot bottom body in which the bottom body is supported on the support ridge, and a reaction force is applied to the bottom body by tightening a tightening body screwed to the center of the bottom body against an inner bottle inside the body. In the structure, the lower end opening of the body is curled inward to have a substantially circular cross section to form the above-mentioned supporting ridge, and parallel side surfaces are formed at two centrally symmetrical locations on the outer peripheral surface of the bottom body, and side surfaces are formed on both sides of the bottom body. The spacing between the surfaces is smaller than the diameter of the opening on the inner side of the supporting flange.

〔Example〕

The heat-retaining pot shown in the accompanying drawings has a body 1, an inner bottle 2, a bottom body 3, a closing body 4, a shoulder body 6, an inner stopper 5, and a handle 7 as main components.

The support ridge 8 formed on the inner periphery of the lower end opening of the body 1 is curled so that its cross-sectional shape is substantially circular. This supporting ridge 8 is formed by pressing using a mold A as shown in FIG. 4b. In this case, the height h of the supporting flange 8 is uniformly determined by the shape of the mold A, regardless of the magnitude of the pressing force of the press or the dimensional tolerance of the body 1.

On the other hand, a collar 9 is formed on the outer periphery of the bottom body 3, and a screw hole 10 for screwing the tightening body 4 is formed in the center thereof. A part of the brim 9 has an engaging part 12 protruding from the seam 11 of the body 1 (see Fig. 2), and the brim is located about 90 degrees away from the engaging part 12 in terms of center angle. 9 is partially cut away to form two centrally symmetrical parallel sides 13, 13.

The above-mentioned collar 9 is formed on the supporting flange 8 to have a diameter that fits snugly into the inner peripheral surface of the body 1, and the distance between the above-mentioned two side surfaces 13, 13 is as follows.
As shown in FIG. 3, it is formed smaller in diameter than the opening on the inner side of the supporting flange 8.

Therefore, if the bottom body 3 is inserted from the lower end opening of the body 1 with the bottom body 3 obliquely placed so that the engaging part 12 is on the line of the seam part 11 (see arrow a in FIG. 3), the bottom body 3 will The two sides 13 , 13 pass inside the support flange 8 and are inserted into the interior of the fuselage 1 . After insertion,
When the bottom body 3 is pulled back while the engaging portion 12 is engaged with the seam portion 11, the collar 9 is supported on the support flange 8 as shown by the two-dot chain line in FIG. Further, rotation of the body 1 around the central axis is prevented. Therefore, when the tightening body 4 is screwed into the screw hole 10, co-rotation with the bottom body 3 is prevented. Further, by tightening the tightening body 4 to the bottom surface of the inner bottle 2, a reaction force is applied to the bottom body 3, and the collar 9 is firmly pressed against the supporting flange 8.

The handle 7 has an engagement groove 16 formed on the inner surface of the upper end of the mounting base 15, and an engagement protrusion 17 formed in the engagement groove 16 (see FIG. 2). The engagement groove 16 is engaged with the periphery of the upper end opening of the body 1, and the engagement protrusion 17 is engaged with an engagement recess 18 formed on the periphery. Further, the lower end portion of the attachment base 15 is attached to the body 1 with screws 19.

The shoulder body 6 is fitted around the upper end of the body 1. A fitting recess 20 into which the upper end of the attachment base 15 of the handle 7 is inserted is formed on the outer circumference of the shoulder body 6 .

A screw 22 corresponding to the threaded portion 21 of the inner plug 5 is partially formed on the shoulder body 6, and a screw 22 corresponding to the threaded portion 21 of the inner plug 5 is formed.
An opening 24 into which 3 is inserted is formed. When the inner stopper 5 is rotated approximately 90 degrees from the closed state, the opening 24 is opened, and when the entire pot is tilted, hot water is discharged from the discharge port 25.

At this time, the flow of hot water may be disturbed because the inner stopper 6 shakes due to the flow of hot water, but in the above embodiment, the stopper 23 has a protrusion that contacts the inner peripheral surface of the opening 24 This problem is solved by providing 26. This protrusion 26 is provided at a position opposite to the discharge port 25 in the open state.

[Effect of idea]

As mentioned above, this idea forms a supporting ridge by curling the lower end opening of the body into a circular cross section, so special consideration must be given to the magnitude of the pressing force during the press operation. without paying
It is possible to form a support ridge with uniform dimensional accuracy, which is effective.

In addition, by forming parallel sides on the outer circumferential surface of the bottom body, the bottom body can be inserted into the body without deforming the body, which improves workability and prevents damage to the body. Therefore, there is an effect that the product value is not impaired.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the embodiment, Fig. 2 is an exploded perspective view of the same as above, Fig. 3 is a partially cutaway sectional view when the bottom body is inserted,
Figure 4a is a sectional view showing a conventional molding method;
FIG. 4b is a sectional view showing the molding method of the above embodiment. 1... body, 2... middle bottle, 3... bottom body, 4...
...Tightening body, 5...Inner stopper, 6...Shoulder body, 7...Handle, 8...Support flange, 9...Brim, 10...Screw hole, 11...Seam joint, 12... ...Engagement part, 13
……side.

Claims (1)

[Scope of utility model registration request] A supporting rim is formed on the inner periphery of the opening at the lower end of the pot body, the bottom body is supported on the supporting flange, and a tightening body screwed to the center of the bottom body is tightened against the medium bottle inside the body. In the mounting structure of the pot bottom body that applies a reaction force to the body, the above-mentioned supporting ridge is formed by curling the lower end opening of the body inward to have a substantially circular cross section, and A mounting structure for a pot bottom body, characterized in that parallel side surfaces are formed at two centrally symmetrical locations, and the interval between the two side surfaces is smaller than the diameter of the opening on the inside of the support ridge.