JPH0221993Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in drain valves, particularly selectively actuated self-sealing drain valves.

Self-sealing drains (drainage mechanisms), especially in bathtubs, sinks, or similar items used for domestic purposes.
It is well known to provide These self-sealing drains are generally provided with a remotely actuatable device linked to the drain itself by a lever or chain mechanism. After some years,
These drains and levers or chain link mechanisms eventually become useless due to corrosion and wear. Because the linkage is usually located in a wall or under a bathtub or sink, it is usually extremely difficult to access the linkage in order to repair it. It happened. Because of the costs involved in such repairs, homeowners often cut costs by providing replaceable, sealable drain valves that do not require remote control.

A typical replaceable drain valve is shown in FIGS. 7-10.

The replaceable drain valves shown in FIGS. 7-10 can be installed in the drain valve body 50 and can often be moved axially to seal the top opening 52 of the replaceable valve. A drain cover 54 was included. With this device,
The resiliency of the rubber boot 56 or the like pushed the drain cover 54 upward from the closed opening 52. Experiments have shown that rubber and similar materials lose their elasticity or flexibility relatively quickly when exposed to repeated wet and dry conditions.
The corrosive effects of detergents, such as those found in soaps and shampoos, have a greater influence on such effects (which include deterioration of the elasticity of rubber). flexible material,
That is, when the rubber boot 56 became useless, the replaceable valve had to be replaced in its entirety all over again.

The device described above also generally includes a drain cover 54.
It included a latch mechanism 58 to secure it in the closed position. To remove the drain cover, it is necessary to press a portion of the drain cover (as indicated by arrow A in FIG. 10) to disengage pin 60 and latch 58.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a drain valve which is easier to operate than the previously known drain valves shown in FIGS. To provide a selectively sealable drain valve that does not require relying on the elasticity of rubber such as a rubber boot for lifting.

The drain valve of the present invention includes a cylindrical drain valve body provided with a radially extending flange at an upper end portion. A plate-shaped cover member is coaxially disposed on and overlying the flange, and an annular gasket extending radially from the cover member abuts the flange to seal the valve. It's summery.

The lower end of the valve body is provided with a base to which an upwardly extending rectangular column is fixed. The rectangular post fits loosely into a tubular member on the underside of the cover member of the valve assembly. A helical compression spring inserted between the center cavity of the upper end surface of the rectangular column and the cover member presses the cover member upward toward the opening position. This allows the cover member to rise from the closed position to the open position without using the elasticity of the rubber or the like constituting the gasket.

The rectangular column is provided with an obliquely extending cam surface on one side, the lower end of which extends toward the lip of the laterally disposed stop slot. A latch pin extending chordally through the tubular member is positioned to rest on the cam surface and is adapted to engage the stop slot. An eccentric lip extends from the top of the rectangular column opposite the cam surface and stop slot. The lip maintains the tubular member in an off-center relationship with respect to the rectangular column. The rectangular column also has a laterally drilled hole in which the biasing spring and ball are placed. The ball impinges on a portion of the central passageway of the tubular member and maintains the central axis of the tubular member in a parallel but laterally offset relationship to the central axis of the rectangular column. In another embodiment, a flat head biasing member is secured within a laterally drilled hole in a rectangular post and is biased by spring action to abut a central passageway portion of a tubular member. ing.

A key portion or projection member is provided outwardly from the post and above the cam surface. A keyway extends longitudinally within the central passageway of the tubular member and engages a key portion to maintain the cover member and post in the correct orientation. As a result, drain valves have fewer maintenance and upkeep problems and have a longer service life.

The selectively sealable drain valve of the present invention includes a tubular valve body 11 with external threads 12. Valve body 11 includes an axial central passageway 14 and a flange 13 extending outwardly from the upper end of the valve body. A stand 16 is fixed to the lower end of the valve body 11 and supports a ring 17 arranged along the shaft. The ring 17 is provided with a screw hole that is aligned with the shaft, as shown in FIG.

The drain valve also includes a generally rectangular post 19 having a threaded lower end 18 adapted to fit into a threaded hole in ring 17. One vertical face 25 of the rectangular column 19 is provided with a laterally extending stop slot 21. This same vertical plane also includes a camming surface 22 extending diagonally inwardly and upwardly from the upper lip of the stop slot 21, as shown in FIG.

The vertical surface 30 of the rectangular support 19 is the same as the previous vertical surface 2.
Opposite 5, this face 30 is provided with a radially extending hole 23. This hole 23
A helical compression spring 24 and a ball 26 are disposed inside. In another embodiment shown in FIGS. 5 and 6, the abutment member 4 has an inwardly extending rectangular shank and a flat head.
0 is received in hole 23. The shank extends coaxially with the spring 24. This spring 2
4 acts to bias the ball 26 or the abutment member 40 radially outward. vertical plane 3
A lip 29 extends from the upper end of 0. 1st
As shown in FIGS. 4 and 5, the lip 29 extends radially outwardly from the vertical surface 30 only.

A central cavity 27 is arranged in the head of the rectangular column 19 . A helical compression spring 28 is disposed within the central cavity 27 and extends upwardly from the rectangular column. The action of the spring 28 will become clear from the subsequent description.

The drain valve of the present invention also includes a drain cover 31 that is generally plate-shaped. A tubular member 33 extends downward from the cover and coaxially with the central axis of the cover. The tubular member 33 has a fourth
An annular recess 35 with a small diameter is provided, as shown in FIGS. An annular sealing gasket 32 is elastically fixed in this annular recess 35, and its outer peripheral portion is slightly downwardly inclined with respect to the cover 31. gasket 32
The outer diameter of the gasket is larger than the diameter of the central passage 14 of the valve body, and the outer periphery of the gasket abuts on the flange 13 in a sealing manner to prevent anything from flowing through the central passage 14 of the drain valve. .

As shown in FIGS. 3, 4, and 5, the chamber 34 inside the tubular member 33 has a rectangular support column 1.
9 is accepted. The width of the strut 19 from the side of the vertical plane 25 to the side of the vertical plane 30 is less than the diameter of the chamber 34, and the tubular member 33 has its central axis parallel to and laterally offset from the axis of the strut 19. placed in relationship. A lip 29 extending from the vertical surface 30 of the post 19 serves to keep the axis of the tubular member 33 transversely offset relative to the axis of the post 19 and also serves to keep the axis of the tubular member 33 transversely offset from the axis of the post 19. The abutment member 40 ensures that the tubular member 33 is in a parallel relationship to the column 19. However, the cover member 31 swings or pivots about the lip 29 in a vertical plane, and the ball 26 or abutment member 40 is forced into the hole 23 over the action of the spring 24.

A latch pin 36 is provided within the lower end of the tubular member 33 and extends along a chord through the chamber 34, ie, one chord of the circle forming the cross-sectional shape of the chamber 34. A latch pin 36 is located adjacent the cam surface and is adapted to be retained within the stop slot 21 as shown in FIG.

A key portion 37, which is somewhat thinner than the pillar, extends in the radial direction from the pillar 19. This key portion is located directly above the cam surface 22. A keyway (track) 38 extends longitudinally in the central passageway of the tubular member 33 and engages a key portion 37 for free sliding movement. The engagement of key portion 37 with keyway 38 allows for free vertical movement of the cover, but prevents rotation of the cover such that latch pin 36 is no longer aligned with cam surface 22 and stop slot 21. Please do not allow this to occur. Key portion 37 also includes tubular member 33
This restricts the counterclockwise rocking movement (see Fig. 5) in a vertical plane centered on the lip 29 of the drain valve, and enables smoother and more reliable operation of the drain valve during the downward movement of the drain cover 31, which will be described later. I have to.

The cover 31 is lifted upward by the spring force of the spring 28, so that the gasket 32 is sufficiently separated from the flange 13 of the drain valve body. In this state, a free flow path is formed between the gasket 32 and the flange 13.

To close the drain valve and prevent the flow of liquid through the central passageway 14, pressure is applied directly onto the tubular member 33, i.e., in FIG.
Press the cover downward by hand by applying pressure to the portion located to the left of the lip 29 of No. 1. As the cover is pushed down, latch pin 3
6 rests on cam surface 22, causing tubular member 33 to pivot slightly clockwise in a vertical plane about lip 29 and forcing ball 26 or member 40 into hole 23. When the latch pin 36 passes over the upper lip of the catch slot 21, the resilient biasing action of the spring 24 forces the latch pin 36 into the catch slot 26, as shown in FIG. 5, securing the cover in the depressed position. The action of spring 24 also forces the tubular member into a parallel relationship to column 19.

Gasket 3 in the arrangement shown in FIG.
The outer circumferential rim of No. 2 abuts on the flange 13.
The valve is thus sealed against all flow through central passageway 14. Any pressure load exerted by the liquid on the valve will cause gasket 2
It will be seen that there is a relationship that increases the sealing effect of No. 3.

To release the drain cover 31 from the closed position shown in FIG.
When pressure is applied to the portion located further to the right, the cover 31 rotates clockwise about the lip 29. This action forces the ball 26 or abutment member 40 into the hole 23 and releases the latch pin 36 from the locking slot 21. Spring 2
The outwardly expanding force of 8 forces the cover member upwardly, opening the valve and allowing liquid to flow therethrough. The upward movement of the cover member is limited by the extent to which the cam surface 22 extends upward.

It will be appreciated that the combined action of springs 28 and 24 allows for a very precise locking operation while still allowing the latch pin to be easily released from the locking slot 21. Furthermore, springs 28 and 24 do not deteriorate or corrode over time, unlike conventionally known resilient materials such as synthetic rubber.
Thus, the valve device of the present invention can have a longer lifespan than conventional devices and can be easily maintained.

[Brief explanation of drawings]

FIG. 1 is an exploded view of the drain valve of the present invention. FIG. 2 is a cross-sectional view of a rectangular support and a tubular member used in the drain valve of the present invention. FIG. 3 is a partial sectional view of the drain valve of the present invention. FIG. 4 is a cross-sectional view of the drain valve of the present invention in the open position. FIG. 5 is a cross-sectional view of the drain valve of the present invention in the closed position. 6th
The figure is an enlarged detail view of another embodiment of the invention. Figure 7 is a front view of a typical conventional replaceable drain valve, and Figures 8, 9, and 10.
The figure is a central longitudinal sectional view of FIG. 7, showing the cover member in the open position, the closed position, and the slightly tilted state for raising the cover member, respectively. 11... Valve body, 19... Support, 13...
Flange, 24... Spring, 14... Center passage, 2
6... Ball, 16... Stand, 31... Cover, 1
7...Ring, 32...Gasket.

Claims (1)

[Claims for Utility Model Registration] (1) A tubular valve body having a through flow passage therein; A strut attached to the valve body so as to extend in the axial direction within the through flow passage; A strut extending in the axial direction a tubular member having a central hole with a closed upper end for receiving the support with a gap around the support; and a skirt having an annular plate shape and sloping downward in a radial outward direction; a sealing member that is attached to the upper end of the tubular member in an inner circumferential portion thereof in a sealed manner and abuts against the upper end surface of the valve body to close the through flow path, and is movable along the strut. a drain seal cover; attached to the tubular member within the central hole;
The drain port seal cover is held in a position that closes the through passage by engaging with a recess formed on one side of the column, and the seal cover is attached to a side opposite to the one side at the upper end of the column. The drain valve is configured to include: a locking means configured to be detached from the recess by rotating about a fulcrum portion provided in the through-flow channel. a first compression spring that urges the drain seal cover upward to open; the column has a radially extending hole that opens on the opposite side below the fulcrum portion; , one end of a second compression spring is received in the hole, and the second compression spring is attached such that a contact member disposed at the other end of the compression spring comes into contact with an inner wall of the central hole. A drain valve characterized by: (2) The drain valve according to claim 1, wherein the abutting member includes a substantially flat head for abutting against the inner wall of the central passage. (3) The second compression spring member includes a helical spring, and the abutting member includes a shank extending from the flat head along the central axis of the helical spring. Drain valve described in Section 2. (4) the strut has an axially extending recess formed in the top thereof, and the first compression spring extends between the bottom of the recess and the closed upper end of the central hole; A drain valve according to claim 1 of the utility model registration claim.