JPH0112045Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an air on-off valve for a bubble bathtub.

Generally, a bubble bathtub has a suction device 16 and an injection device 17 installed on the tank wall 15 of the bathtub 14, as shown in FIG. An air opening/closing valve 21 is provided at the tip of an air pipe 20 that communicates with the provided circulation pipe 19 and also communicates with the injection device 17. The structure is such that the water is ejected into the bathtub 14 as a jet stream mixed with air.

Accordingly, the present application relates to an air on-off valve provided at the tip of the air pipe.

Hitherto, various structures of this type of air on/off valve are known, and the simplest one is the one shown in FIG. 7, disclosed in Japanese Patent Application Laid-open No. 134162/1983.

To explain the example shown in FIG. 7, a male threaded portion 22 is provided at a small diameter portion on the outer periphery of the tip of the main body 1, and an O-ring 23 is fitted into the large diameter portion below the male threaded portion 22 so as to protrude from the outer peripheral surface. , a recess 24 is formed between the male threaded portion 22 and the O-ring 23, an opening is provided in the recess 24 to serve as an air inlet 25, and a female threaded portion 26 is provided in the inner part of the cap-shaped handle 13; A pull-out prevention part 2 that comes into contact with an O-ring 23 when the handle 13 is pulled out from the main body 1 by screw rotation of the handle 13 in which a female threaded part 26 is screwed into a male threaded part 22.
7 is provided on the handle 13, and this slip-off prevention part 2
7 to the O-ring 23, the handle 13
This prevents them from escaping.

Therefore, in this case, the O-ring, which serves as the valve seat of the air valve, may be damaged or fall off due to the handle's slip-off preventing portion hitting the O-ring.

The technical problem to be solved by the present invention is to stop using the valve seat of the air valve to prevent the handle from coming off, and instead use other members to prevent the handle from coming off.

The configuration of the present invention for achieving the above technical problem is that the structure is formed in a cylindrical shape, has a first female threaded portion on the inner circumferential surface of the upper opening, and has an inner diameter smaller than the inner diameter of the first female threaded portion on the inner circumferential surface of the middle part. A main body having second female threaded parts, respectively, and a male threaded part formed in an annular shape and provided on the outer peripheral surface to be screwed onto the first female threaded part of the main body, and a male threaded part formed in an annular shape and provided on the outer peripheral surface of the main body. A sealing holder having an annular concave groove and a protrusion formed in an annular shape and projecting inward on the lower inner circumferential surface of the sealing holder are provided, and the protrusion is engaged with the groove of the packing holder to remove the first female body of the main body. A valve seat seal is provided between the inner circumferential surface above the threaded portion and the outer circumferential surface above the male threaded portion of the seal holder, and the upper end portion of the valve seat seal protrudes upward from the main body, and the valve seat seal is provided at the cylindrical body portion and the central portion of the cylindrical body portion. A spindle that is screwed onto the second female threaded part of the main body by a male thread provided on the outer circumferential surface of the cylindrical body, and the upper end surface of the cylindrical body is located below the lower end surface of the seal presser. and a handle that is attached to the upper end of the shaft of the spindle and whose bottom surface approaches and separates from the packing.

When the handle is rotated and pulled upward, the cylindrical body of the spindle comes into contact with the lower end of the packing presser, and further upward movement of the spindle is stopped, thereby preventing rotation of the handle. Therefore, the handle will not fall off from the main body.

An example of implementing the present invention will be described below based on the drawings.

In the figure, 1 is the main body, which is formed in a cylindrical shape, and has a first female threaded portion 2 at the upper opening on the inner circumferential surface, and the first female threaded portion 2 at the middle part.
They each have a second female threaded portion 3 having a smaller diameter than the inner diameter of the female threaded portion 2, and have a flange 28 in the middle of the outer peripheral surface, and a female threaded portion 29 above this flange 28.

In addition, the main body 1 has an air pipe connection portion 47 at the lower opening.
and connect an air pipe 20 communicating with the injection device 17 of the bathtub wall 15.

The main body 1 is connected to the upper rim 30 of the bathtub 14.
is passed from the back side through the mounting hole 31 drilled in the rim 30, and the rim 30 is held between the nut 32 screwed from the front side of the rim 30 to the external threaded part 29 on the outer peripheral surface and the flange 28, and attached to the top surface of the rim 30. It is fixed to the rim 30 with the upper opening protruding.

A packing holder 4 is screwed onto the first female threaded portion 2 of the inner peripheral surface of the main body 1, and a spindle 9 is screwed onto the second female threaded portion 3, respectively.

The packing holder 4 is formed into an annular or short cylindrical shape, and has a male screw portion 5 provided on the outer peripheral surface of the main body.
It is screwed into the first female threaded portion 2 of the main body 1 and mounted inside the main body 1.

Further, the seal retainer 4 has a slight gap between the outer circumferential surface above the male threaded portion 5 and the inner circumferential surface of the upper opening of the main body 1, and an annular groove 6 is formed on the outer circumferential surface above the male threaded portion 5. It is formed.

A valve seat packing 7 is fitted into the groove 6.

The valve seat gasket 7 is formed into an annular shape and has an annular protrusion 8 that protrudes inward on the lower inner circumferential surface. It is arranged between the upper inner circumferential surface of the first female threaded part 2 and the upper outer circumferential surface of the male threaded part 5 of the packing holder, and is tightly attached to both the above-mentioned surfaces, and the upper end is attached above the main body 1 and the packing holder 4. stand out.

On the other hand, the spindle 9 has a bottomed cylindrical body part 10 having a male screw part 12 screwed into the second female screw part 3 of the main body 1 on the outer circumferential surface and having an open bottom surface;
The cylindrical body part 10 has a shaft part 11 standing upright in the center of the upper surface thereof, and an air passage hole 33 is provided in the upper surface of the cylindrical body part 10.

This spindle 10 is inserted into the main body 1 and screwed onto the second female threaded part 3 of the main body 1 via the male threaded part 12.

Further, when the spindle 9 is installed in the main body 1, the upper end surface of the cylindrical body portion 10 is located below the lower end surface of the packing presser 4, and the shaft portion 11 extends upward through the center portion of the packing presser 4. Ori,
A silencer 3 is provided in the opening at the lower end of the cylindrical body 10.
4 is attached, and a handle 13 is attached to the upper end of the spindle 9.

The handle 13 is formed in the shape of a cap to cover the opening at the upper end of the main body 1, and has a spindle mounting portion 37 projecting from the center of the bottom surface and having a recess 36 with a spline 35 on the inner peripheral surface.

Further, the upper surface of the handle 13 is recessed in a circular shape except for the peripheral edge, and a display lid 40 having an index 39 is fitted into the recessed recess 38.

The handle 13 is attached to a spindle mounting portion 37.
is fitted onto the upper end of the shaft portion 11 of the spindle 9, the spline 35 is engaged with the spline 41 formed on the outer circumferential surface of the upper end of the shaft portion 11, the handle 13 is passed through the center of the recessed notch 38, and the shaft portion of the spindle 9 is inserted. 1
1 is fixed to the spindle 9 by a set screw 42 screwed into the upper end surface.

In addition, 44 in the figure is a control plate 46 attached to the upper rim 30 of the bathtub 14.
Display plate 4 with necessary display 45 on the top surface
3 is glued.

The display 45 represents items necessary for the operation of the air on-off valve 21 and other devices using designs, letters, etc. In the illustrated example, the display 45 consists of letters indicating open/close, arrows indicating the rotation range of the handle, etc.

When the handle 13 is rotated, the spindle 10 rotates and moves up and down, and accordingly, the handle 13 also moves up and down, and the back surface of the handle 13 approaches and separates from the valve seat packing 7.

In FIG. 1, the handle 13 is the valve seat gasket 7.
, and air is not supplied to the blowout device 17.

At this time, the indicator 39 on the handle 13 corresponds to the word "close" on the display plate 43.

When the handle 13 is rotated counterclockwise from the state shown in FIG. 1, the handle 13 gradually moves upward and its back surface separates from the valve seat packing 7.

Therefore, the air flows into the main body 1 through between the valve seat gasket 7 sucked by the suction action of the injection device 17 and the back surface of the handle 13, and the air flows into the main body 1 through the suction action of the injection device 17.
The air passes through the air passage hole 33 in the cylindrical body part 10 of the spindle 9, passes through the silencer 34, and enters the air pipe 2.
0 to the injection device 17.

Then, as the rotation angle of the handle 13 increases and the gap between the valve seat gasket 7 and the back surface of the handle 13 increases, the amount of air supplied increases.

When the handle 13 is further rotated and the spindle 9 continues to rise, the upper end surface of the cylindrical body part 10 of the spindle 9 will eventually hit the lower end surface of the seal holder 4 as shown in FIG. 3, preventing the spindle 9 from rising.
3 will not be able to rotate any further.

In this state, the indicator 39 on the handle 13 corresponds to the character ``open'' on the display plate 43.

Incidentally, if the handle 13 is rotated clockwise from the state shown in FIG. 3, the operation will be completely opposite to that described above.

Since the present invention has the above configuration, it has the following advantages.

The valve seat gasket is fixed with a gasket holder, and the cylindrical body of the spindle comes into contact with the bottom end of the gasket holder, preventing the spindle from moving upwards, so even if the handle is turned excessively, the spindle to which the handle is attached will not move. does not fall off from the main body, and does not damage the valve seat gasket like conventional valves. Of course, the valve seat padskin will not fall off.

The seal retainer serves both to hold down the valve seat seal and to prevent the spindle from coming off, so there are fewer parts and the cost is low.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an air on-off valve for a bubble bath showing an embodiment of the present invention, and is taken along the - line in FIG. 2 to show the valve in the closed state. Figure 2 is a plan view;
Figure 3 is a sectional view of the valve in the open state, Figure 4 is a plan view of the same,
FIG. 5 is a sectional view showing an exploded state, FIG. 6 is a schematic diagram of a bubble bathtub, and FIG. 7 is a sectional view showing an example of a conventional air on-off valve for a bubble bathtub. In the figure, 1... Main body, 2... First female threaded part of main body, 3... Second female threaded part of main body, 4... Seal holder, 5... Male threaded part of packing holder, 6... Concave. Groove, 7... Valve seat gasket, 8... Protrusion of valve seat gasket, 9... Spindle, 10... Cylindrical body portion of spindle, 11... Shaft portion of spindle, 12... External threaded portion of spindle, 13...Handle.

Claims (1)

[Scope of utility model registration request] a main body formed in a cylindrical shape and having a first female threaded portion on the inner circumferential surface of the upper opening and a second female threaded portion having an inner diameter smaller than the inner diameter of the first female threaded portion on the inner circumferential surface of the midway portion; a packing holder which is screwed onto the first female threaded part of the main body by a male threaded part provided on the outer peripheral surface thereof and has an annular groove on the outer peripheral surface above the male threaded part; A protrusion protruding inward is provided on the lower inner circumferential surface, and the protrusion is engaged with the concave groove of the packing holder to connect the inner circumferential surface above the first female threaded part of the main body and the outer periphery above the male threaded part of the packing holder. A valve seat gasket is provided between the cylinder body and the cylinder body and has an upper end protruding upward from the main body, and a cylinder body and a shaft portion provided in the center of the upper surface of the cylinder body and extending upward. The spindle is screwed onto the second female threaded part of the main body by the provided male threaded part, and the upper end surface of the cylindrical body is located below the lower end surface of the seal presser, and the spindle is attached to the upper end of the shaft part of the spindle and its bottom part is attached to the spindle. and a handle that moves into and out of contact with the gasket.