JPH0246527Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a flush valve that supplies flush water to flush toilets, etc., and in particular, a flush valve that has an improved structure for preventing slippage of the check valve and water flow control valve. It is related to.

[Conventional technology]

An example of a conventional flush valve will be explained with reference to FIG. Reference numeral 10 is a valve casing;
It has an inlet 12 and an outlet 14, between which a piston main valve 16 and a check valve/water flow control valve 18 are provided. The piston main valve 16 is slidably inserted into an opening 22 of the partition wall 20, and a starting valve 24 is provided inside the piston main valve 16. Reference numeral 26 denotes a push button, to which a push rod 28 is connected, and this push rod 28 contacts the shaft portion 24a of the starting valve 24 to close the starting valve 24.
It is now possible to tilt the The piston main valve 16 has an opening above it, and a cover cap 30 is screwed into this opening. An adjusting screw 32 is screwed into the cover cap 30.

A partition wall 34 is provided on the upstream side of the piston main valve 16, and a check valve/water amount control valve 18 is arranged in the opening 36 of the partition wall 34 so as to approach and separate from the upper side. This check valve and water flow control valve 18 has an adjustment screw 38.
The shaft portion 18a is slidably inserted into the valve casing, and the adjusting screw 38 is screwed into an opening provided on the upper side of the valve casing. Further, a nut 40 with a through hole into which the adjusting screw 38 is fitted is screwed onto the valve casing 10. As shown in the figure, the inner diameter of the through-hole nut 40 is smaller than the lower end of the control valve 38.

In the flush valve configured in this manner, when the push button 26 is pressed to tilt the starting valve 24, water in the chamber B above the piston main valve 16 passes through the opening 42 of the piston main valve 16 and flows into the partition wall 20.
It flows out into chamber C on the outflow side. As a result, the water pressure balance between the chamber A on the upstream side of the piston main valve 16 and the above-mentioned chamber B is broken, and the piston main valve 16 is pushed up and opened by the water supply pressure in the chamber A, and the water supply from the inlet 12 is caused. The water flows out through chambers A and C toward the toilet bowl. Meanwhile, during this outflow, the opening 42
Water gradually flows into chamber B through the water pressure, and the piston main valve 16 is gradually pushed down, eventually closing the flow of cleaning water.

The check valve and water flow control valve 18 prevents the backflow of this wash water and also controls the flow rate. and closes the cleaning water circuit. In addition, by turning the adjustment screw 38 to change its vertical position, the maximum upward movement position when the check valve and water flow rate adjustment valve 18 is pushed up by the water supply pressure is determined, and thereby the opening position is determined. The amount of water flowing into the chamber A from 31 can be adjusted.

[Problem that the invention attempts to solve]

By the way, in the above-mentioned conventional flush valve, when the adjusting screw 38 is turned to shift the adjusting screw 38 upward, if the adjusting screw 38 is turned excessively, the thread engages with the valve casing, and the inside of the flush valve is damaged. Water may overflow. The above-mentioned through-hole nut 40 is provided to prevent the adjustment screw 38 from coming off, and the screw 38 comes into contact with the nut 40 when the adjustment screw 38 is turned to its full limit. This prevents further rotation in the pulling direction.

However, if such a nut 40 is used, the number of parts increases and the manufacturing cost of the flush valve increases accordingly. In addition, in order to fit the nut 40, it is necessary to provide the check valve and water flow control valve 18 at a distance from the main valve 16, and the length of the flush valve (the length in the left-right direction in FIG. 3) is large. I was getting used to it. Furthermore, since the nut 40 forms an uneven portion,
There were problems such as it getting in the way of cleaning and being inferior in terms of design.

[Means for solving problems]

The flush valve of the present invention is characterized in that the outer edge of the cover cap extends so as to overlap at least a portion of the adjustment screw for attaching the check valve and water flow rate adjustment valve.

[Effect]

In the flush valve of the present invention, when the adjustment screw that supports the check valve and water flow control valve is turned toward the release side, the adjustment screw eventually hits the cover cap and is prevented from turning any further toward the release side. . Thereby, there is no possibility that the adjusting screw may be turned excessively and the valve may come out of the valve casing, and the fear of water leakage etc. is eliminated.

〔Example〕

Embodiments will be described in detail below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a flush valve according to an embodiment of the present invention. In this embodiment, the cover cap 30 is screwed to fit inside the upper opening of the piston main valve 16, and the cover cap 30 is provided with a flange portion 30a that extends laterally.

Further, the adjusting screw 38 supporting the check valve/water amount adjusting valve 18 is screwed in such that its upper end surface is substantially flush with the upper surface of the valve casing 10, and the flange portion 30a of the cover cap 30 is It is arranged so as to partially overlap this adjustment screw 38.

The configuration of other parts in FIG. 1 is the same as that in FIG. 3, so the same members are given the same reference numerals and their explanations will be omitted.

In the flush valve configured in this way, the flushing water can be similarly caused to flow down by pushing the push button 26, and the adjusting screw 38
The flow rate of this washing water can be adjusted by turning . Therefore, in this embodiment, when the adjusting screw 38 is turned toward the withdrawal side, the adjusting screw 38
When the upper end surface of the cover cap comes into contact with the flange portion 30a of the cover cap, the cover cap cannot be turned any further toward the removal side, and removal due to excessive turning of the adjustment screw is prevented.

In the embodiment shown in FIG. 1, the flushing water is discharged using a push button 26 as in the conventional example shown in FIG. It is clear that the present invention can also be applied to

FIG. 2 is a sectional view of a flush valve according to a different embodiment of the present invention. Reference numeral 50 denotes a valve casing, which has an inlet 52 and an outlet 54, and a check valve and water flow control valve 58 that can be attached to and separated from the upper edge of the water supply passage of the partition wall 56 provided on the upstream side. There is. The valve 58 has a shaft portion 58a slidably supported by an adjustment screw 60, and the adjustment screw 60 is screwed onto the valve casing 50.

In addition, a piston main valve 6 is provided on the downstream partition wall 62.
A starter valve 66 is disposed above the piston main valve 64. The starting valve 66 is connected to the valve casing 5 via a mounting member 68.
0, and is biased upward by a spring 70 provided between the mounting member 68 and the mounting member 68. A cover cap 72 is pivotally supported to the valve casing 50 via a support shaft 74 so that the starting valve 66 can be pressed down from above. Reference numerals 76 and 78 are water holes provided in the valve casing 50 and the mounting member 68, and the starting valve 6
A gap E on the side circumferential portion of the partition wall 6 and a chamber F on the downstream side of the partition wall 62 are communicated with each other.

In the flush valve configured in this way, when the lever portion 72a of the cover cap 2 is pushed in, the starting valve 66 is pushed down by the lever action, and the chamber D between the starting valve 66 and the piston main valve 64 is pushed down. communicates with the F chamber via the gap E and the water passages 78 and 76, and the water pressure in the D chamber decreases. As a result, the piston main valve 64 is pushed up by the water supply pressure, and the water supply from the inlet 52 flows directly into chamber F through the opening 80 and is supplied to the toilet bowl. Further, a part of this cleaning water gradually flows into the D chamber through the opening 82, gradually lowering the piston main valve 64, and finally the piston main valve 64 seats on the partition wall 62, closing the outflow of the cleaning water. .

In this embodiment, the cover cap 72 is arranged so as to overlap a part of the outer edge of the adjusting screw 60.
The outer edge of the adjusting screw 60 is extended.
When the adjusting screw 60 is turned toward the withdrawal side, the upper end surface of the adjusting screw 60 comes into contact with the lower end surface 72b of the cover cap 72, thereby preventing further rotation toward the withdrawal side. Therefore, this embodiment also reliably prevents the adjustment screw 60 from being turned excessively toward the withdrawal side during the water volume adjustment operation, thereby preventing the adjustment screw from coming off.

In this embodiment, the adjusting screw 60 side of the cover cap 72 is made slightly thicker to form an overlapping portion between the adjusting screw 60 and the cover cap 72. For example, it is also possible to form a protrusion on the cover cap 72. By doing so, the cover cap 7
2 and the adjusting screw 60 may be formed to overlap each other.

[Effect of idea]

As described above, according to the flush valve of the present invention, when adjusting the flow rate of flushing water by turning the adjustment screw that supports the check valve and water flow control valve, the adjustment screw may be turned excessively toward the release side. It does not come off from the valve casing, and water leakage accidents during the adjustment work can be prevented. Therefore, there is no need for a nut member to prevent the adjusting screw from coming off, and the number of parts can be reduced, resulting in lower manufacturing costs, assembly costs, etc. Furthermore, in the present invention, the check valve and water flow control valve can be placed close to the piston main valve, and the size of the valve can be made smaller accordingly. Furthermore, there is no need for the above-mentioned nut for preventing the adjusting screw from slipping out, unnecessary unevenness is eliminated, cleaning can be easily performed, and the design is simple and good-looking.

[Brief explanation of the drawing]

1 and 2 are sectional views of a flush valve according to an embodiment of the present invention, and FIG. 3 is a sectional view of a conventional example. 10,50... Valve casing, 16,64...
Piston main valve, 18, 58... Check valve and water flow control valve, 24, 66... Starting valve, 26... Push button,
38, 60... Adjustment screw, 30, 72... Cover cap.

Claims (1)

[Scope of utility model registration request] A piston main valve is provided in the valve casing, a cover cap is screwed onto the valve casing above the piston main valve, and a check valve and check valve is provided inside the valve casing on the upstream side of the piston main valve. A water flow control valve is installed, and this non-return valve and water flow control valve is a flush valve supported via a control screw screwed onto the valve casing from above. A flush valve that is characterized by extending to a position where it partially overlaps.