JPS6240280Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a bathtub cap.

BACKGROUND ART Conventionally, a bathtub cap screwed onto the inner end of a connecting pipe connecting a bathtub and an outer pot has been made of brass plated with chrome. However, recently,
For beauty and health, it is for good fragrance.
As bath additives are often added to bath water, as shown in Figure 1, significant early corrosion has occurred on the entire surface b of the outer rim a, turning it black and making it very unsightly. There were many accidents that required replacement of caps.

Therefore, it may be possible to consider making the entire cap from stainless steel, but as is well known, stainless steel has the drawback of poor machinability and increased costs.

The object of the present invention is to provide a cap that can reliably prevent the above-mentioned corrosion accident and is easy to manufacture and inexpensive.

The present invention will be explained in detail below based on the illustrated embodiment. In Fig. 2, 1 is a bathtub, 2 is an outer pot, and 3 and 4 are connecting pipes for water absorption and hot water discharge, respectively, and are connected to the indoor bathtub 1. The outdoor outer pot 2 is connected by two connecting pipes 3 and 4. A cap with an umbrella 5 attached is screwed onto the inner end of the upper connection pipe 4 for discharging hot water, but when viewed from the person taking a bath, the cap 6 is completely blocked by the umbrella 5. Since it is not visible, it does not cause much of a problem even if the cap 6 becomes blackened and corroded. However, since the cap 7 screwed onto the inner end of the lower water absorption connecting pipe 3 is easily visible to a person taking a bath, blackening and corrosion are strongly discouraged.

FIG. 3 shows an example of the lower connecting pipe 3, which has a bellows part 8 in the middle, a female screw part 9 formed at the inner end, and a cover-like outer collar 10 on the inner end side. A gasket 11 having a J-shaped cross section is attached so as to be in contact with the back surface of the wall 12 of the bathtub 1 via the gasket 11. That is, from the front side of the wall 12 of the bathtub 1, the cap 7 is inserted through the annular gasket 13.
The connecting pipe 3 is attached by screwing the gaskets 11 and 13 between the wall 12 and the gaskets 11 and 13.

As shown in FIGS. 4, 5, and 6, the bathtub cap 7 is constructed by fixing and integrating an annular stainless steel thin plate 15 to a brass cap body 14, as will be described later. Specifically, the entire body is cylindrical, and a male threaded portion 16 that engages with the female threaded portion 9 of the connecting tube 3 is carved on the outer peripheral surface, and a pair of locking pieces 17, 17 are provided on the inner peripheral surface. a cylindrical portion 18 protruding from the surface;
The base body 14 consists of an outer flange 19 connected to the inner end of the cylindrical portion 18, and an outer peripheral edge 2 of the outer flange 19.
0 has a rectangular recess 22 cut out on the back surface 21 side over its entire circumference. Further, the opening inner peripheral edge 24 of the hole 23 of the cap body 14 and the outer surface 2
A triangular chamfer 25 is formed at the corner with 6.

Next, as shown in FIG. 6, a polished thin plate 15 having a cross-sectional shape and an annular shape as a whole is applied to the outer circumferential edge 20 and surface 26 of the outer flange 19, and the inner circumferential edge of the opening of the hole 23. When 24 coats are coated, the state shown in FIG. 6 is obtained. Arrow A indicates the direction of coating. Subsequently, as shown in FIG. 6, the outer peripheral edge 27 of the thin plate 15 is pressed from the outer radial direction in the direction of arrow B to plastically bend and deform the thin plate 15 into the recess 22. As shown in FIGS. 6 and 4, a polished thin plate 15 of stainless steel is fixed to the base body 14 to form the bathtub base 7. In this manner, the outer circumferential edge 27 of the thin plate 15 can be reliably fixed and integrated by pressing it against the recess 22 of the outer flange 19 of the base body 14 by squeezing or the like.

As shown in FIG. 6, the annular thin plate 15 is preformed by press processing into a shape with a large roundness at the bent portion corresponding to the chamfer 25 of the mouthpiece body 14, and is integrated into the mouthpiece body 14. As shown in FIG. 6, a crescent-shaped escape gap is formed between the back surface of the thin plate 15 and the chamfer 25 (to avoid interference).

Note that the inner diameter of the opening inner peripheral edge 24 of the hole 23 is cut slightly larger to form a stepped shape, and the thin plate 15 is attached to the stepped shape.
If the hole 23 is coated, the inner surface of the hole 23 is made to have the same continuous diameter. It is also preferable to form the recess 22 with a triangular chamfer. The base body 14 may be made of a metal material other than brass, but it is a metal material that rusts more easily than stainless steel. Of course, a metal material with good machinability is desirable.

Moreover, it is necessary that the outer peripheral edge 27 of the thin plate 15 does not protrude from the back surface 21 of the outer flange 19 after the plastic deformation and fixation.

As detailed above, the bathtub cap according to the present invention is more easily rusted than stainless steel in the bathtub cap screwed onto the inner end of the connecting pipe 3 that connects the bathtub 1 and the outer pot 2. A recess 22 is cut out in the outer peripheral edge 20 of the outer flange 19 of the cap body 14 made of a metal material on the back surface 21 side over the entire circumference, and
A triangular chamfer 2 is formed at the corner of the hole 23 and the facing surface 26.
5 and further includes an annular stainless steel thin plate 1
5 to the outer peripheral edge 20 of the outer flange 19 and the outer surface 2
6, and the inner circumferential edge 24 of the opening of the hole 23, and plastically bends and deforms the outer circumferential edge 27 of the thin plate 15 into a hook shape toward the recess 22, and the outer circumferential edge 27 The thin plate 15 is fixed to the base body 14 so that the thin plate 15 does not protrude from the back surface 21 of the outer flange 19, and the bent portion of the thin plate 15 corresponding to the chamfer 25 has a large roundness. Since the configuration has an escape gap formed between the back surface and the chamfer 25, the following significant effects can be obtained. That is, when it is attached to the bathtub 1, it has a beautiful white silver color, which increases the commercial value, and the conventional black corrosion as shown in FIG. 1 can be effectively prevented. The base body 14 can be made of low-grade metal material, reducing costs. Since the outer flange 19 is made of hard metal, the outer peripheral edge 27 of the thin plate 15 is inserted into the recess 22 of the outer flange 19.
It is extremely easy to plastically bend the material.
Since the outer peripheral edge 27 of the thin plate 15 does not protrude from the back surface 21 of the outer flange, the gasket 1
A complete seal can be obtained without damaging the 3rd grade. The whole can be manufactured at low cost by plastic bending. It has a triangular chamfer 25 and a corresponding large roundness of the thin plate 15, and the back surface of the thin plate 15 and the chamfer 25
A crescent-shaped escape gap is formed between the thin plate 15 and the thin plate 15 so that the thin plate 15 can be tightly integrated with the facing surface 26 (without the corners interfering with the back surface of the thin plate 15).
The large roundness of the thin plate 15 corresponding to the triangular chamfer 25 reduces the suction resistance of hot water to the connecting pipe 3 in the installed state, and improves the circulation of hot water when the outer pot 2 is fired.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional cap, Fig. 2 is a partial cross-sectional side view illustrating the parts where the present invention is used, Fig. 3 is an enlarged view of the same main part, and Fig. 4 is an implementation of the cap of the present invention. FIG. 5 is a side view showing an example, FIG. 5 is a front view of the same, and FIG. 6 is an explanatory cross-sectional view that also serves as an enlarged view of essential parts and shows the manufacturing order. 1...Bathtub, 2...Outer pot, 3...Connecting pipe, 14
...Cap body, 15... Thin plate, 19... Outer tsuba, 2
4... Opening inner peripheral edge, 25... Chamfering, 26...
...Front surface, 27...Outer peripheral edge.

Claims (1)

[Scope of utility model registration request] In a bathtub cap screwed onto the inner end of a connecting pipe 3 that connects the bathtub 1 and the outer pot 2, the outer peripheral edge of the outer flange 19 of the cap body 14 made of a metal material that rusts more easily than stainless steel. The portion 20 has a recess 22 cut out on the back surface 21 side over its entire circumference, and a triangular chamfer 25 at the corner of the hole 23 and the front surface 26.
and an annular stainless steel thin plate 15
The outer peripheral edge 20 and the facing surface 26 of the outer flange 19,
The inner circumferential edge 24 of the opening of the hole 23 is covered, and the outer circumferential edge 27 of the thin plate 15 is plastically bent into a hook shape toward the recess 22 so that the outer circumferential edge 27 extends outward. The thin plate 15 is fixed to the cap body 14 so as not to protrude from the back surface 21 of the collar 19,
A bathtub cap characterized in that the bent portion of the thin plate 15 corresponding to the chamfer 25 has a large roundness, and an escape gap is formed between the back surface of the thin plate 15 and the chamfer 25.