JP2006265971A - Structure for preventing water from flowing back to water flow type bowl via overflow pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new back-flow preventing structure for a water flow type bowl, which can prevent discharged water from the drain port of the water flow type bowl from flowing back into the water flow type bowl via an overflow pipe and an overflow hole. <P>SOLUTION: A check valve 6, which opens in the inward direction of a drain valve 4 by only the inflow of the discharged water into the overflow pipe 2 from the overflow hole 5 of a washbowl 1, is arranged at a place where the overflow pipe 2 is provided, in such a manner as to continue into the overflow hole 5 of the washbowl 1 constituting the water flowing bowl being connected to the drain valve 4 installed in the drain port 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a backflow prevention structure for an overflow pipe in a flowing water ball such as a wash bowl provided in a wash basin.

  In the wash bowl constituting the conventional running water ball, for example, as shown in FIGS. 4 (A) and 4 (B), hot water overflows from the wash bowl 101 when water or hot water is accumulated in the wash bowl 101. In order to prevent the overflow from exiting, an overflow hole 102 is often provided in the upper part of the wall surface of the wash bowl 101. When the water level rises to the position of the overflow hole 102 by the wash bowl 101, the hot water flows into the overflow hole 102, and through the drain pipe 105 connected to the drain port 104 of the wash bowl 101 through the overflow pipe 103 connected thereto. The drainage pipe 106 is drained.

  In the conventional wash bowl 101 provided with such an overflow hole 102 and an overflow pipe 103 connected to the overflow hole 102, in order to prevent the generation of air drawing sound from the overflow hole 102 during drainage from the wash bowl 101, an overflow It has also been proposed to provide an openable and closable valve in the overflow hole 102 that is open when drainage from the hole 102 is necessary and is normally closed (see, for example, Patent Document 1).

However, in the conventional wash bowl 101 provided with the overflow hole 102 and the overflow pipe 103, when drained from the drain port 104 as shown by the solid line arrow in FIG. , There is a concern that there may be a back flow from the overflow hole 102 to the wash bowl 101 through the overflow pipe 103 as indicated by the broken line arrow in the figure. This has the effect of maintaining the same water level in the hot water, but the water level of the overflow pipe 103 also rises due to this action, so that the hot water is drained from the drain 104 and the wash bowl is discharged from the overflow pipe 103 and the overflow hole 102. This is because there is a concern about backflow in 101. Furthermore, since the drain pipe 106 is usually provided with a hair catcher or the like, drainage resistance due to this is considered to contribute to the backflow. Such a concern can be solved even if the overflow hole 102 is provided with an openable / closable valve for preventing the generation of air drawing sound from the overflow hole 102 during drainage, as described in Patent Document 1 above. could not. The valve in this case does not have the function of preventing the backflow as described above.
JP-A-8-184084

  Therefore, the present invention eliminates the conventional problems from the background as described above, and the drainage from the drainage port of the flushing ball such as a wash bowl flows back to the flushing ball through the overflow pipe and the overflow hole. It is an object of the present invention to provide a new backflow prevention structure for flowing water balls.

  In order to solve the above problems, the present invention provides an overflow pipe from the overflow hole of the flowing water ball to the connection point between the overflow pipe connected to the overflow hole of the flowing water ball and the drain plug installed in the drain port. A backflow prevention valve that opens to the inside of the drain plug only by the inflow of drainage into is provided.

  According to the present invention, the drainage from the drainage port of the flowing water ball can be prevented from flowing back to the flowing water ball through the overflow pipe and the overflow hole.

  The present invention has the features as described above, and the embodiments thereof will be described below with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional view illustrating an embodiment of a backflow prevention structure for a flowing water ball overflow pipe according to the present invention.

  2A and 2B are enlarged cross-sectional views illustrating the main part A of FIG. 1. FIG. 2A is a state in which hot water is drained from the overflow hole, and FIG. 2B is a normal state in which hot water is not drained from the overflow hole. Shows the state. FIG. 3 is an enlarged perspective view of a main part illustrating the part A in FIG.

  In the example of FIG. 1, an overflow hole 5 for preventing overflow from the hot water wash ball 1 is provided in the upper surface of the wash ball 1 constituting the running water ball, and the water level rises to the position of the overflow hole 5. Then, excess hot water flows into the overflow hole 5 and is drained through the overflow pipe 2 to the drain plug 4 connected to the drain port 3 and to the drain pipe 8, thereby preventing overflow.

  A check valve 6 is disposed at the connection between the overflow pipe 2 and the drain plug 4 connected to the drain port 3 so that the overflow pipe 2 covers the entire opening 7 communicating with the drain plug 4. It is installed.

  As shown in FIG. 2 (A), the backflow prevention valve 6 is only inflow of drainage from the overflow hole 5 to the overflow pipe 2, and along the drainage direction W, for example, as shown by an arrow X. Open. On the other hand, when there is no such drainage, the backflow prevention valve 6 is closed and the opening 7 is blocked as shown in FIG. For this reason, the drainage from the drainage port 3 of the wash bowl 1 does not flow back to the overflow hole 5. Further, the backflow prevention valve 6 may have a quadrangular shape as in the example of FIG. Of course, other shapes such as a circular shape may be used, and the shape is not particularly limited as long as the entire opening 7 can be covered.

  When the check valve 6 is closed, as shown in FIG. 2B, at least a part (for example, the lower end 61) of the peripheral end of the check valve 6 is connected to the peripheral portion of the opening 7. If the drain plug 4 is provided so as to contact at least a part (for example, the lower edge) on the inner side of the drain plug 4, the backflow prevention valve 6 is pushed open to the overflow hole 5 side by the hydraulic force of the drain water flowing from the drain port 3. Can be prevented, which is preferable.

  1 to 3, the hot water drained from the overflow hole 5 passes through the overflow pipe 2 and the hydraulic power of the backflow prevention valve 6 is indicated by the arrow X, as shown by the arrow X on the inner side of the drain plug 4. It is opened to the drain plug 4 and drained to the drain plug 4 and finally drained to the drain pipe 8 connected to the drain plug 4. At this time, even if hot water is accumulated in the wash bowl 1 and the hot water in the wash bowl 1 is drained from the drain port 3, the backflow prevention valve 6 is disposed at the connection point between the overflow pipe 2 and the drain plug 4 as described above. Since it is provided, backflow can be prevented, hot water does not come out from the overflow hole 5, and it looks good.

  As described above, the backflow prevention structure for the flowing water ball overflow pipe according to the present invention has the wash ball 1 discharged from the drain port 3 of the wash bowl 1 constituting the flowing water ball through the overflow pipe 2 and the overflow hole 5. It is possible to prevent backflow.

  Further, the arrangement of the backflow prevention valve 6 in the present invention will be further described. As illustrated in FIGS. 1 to 3, the opening 7 is covered at the connection portion between the overflow pipe 2 and the drain plug 4. For example, the backflow prevention valve 6 can be disposed by connecting the upper end portion of the backflow prevention valve 6 to the drain plug 4. Although not shown in the figure, the backflow prevention valve may be provided by simultaneous molding (hard and soft simultaneous molding) with the drain plug via a flexible material that can be bent.

  In the above embodiment, the wash bowl of the wash basin has been described as an example of the wash water ball. However, the present invention can be applied to all balls having an overflow pipe, such as a dishwasher of a sink and a unit bath.

  Of course, the backflow prevention structure for the flowing water ball overflow pipe of the present invention is not limited to the above examples, and it is needless to say that various aspects can be adopted in the details.

It is sectional drawing which illustrated one Embodiment of the backflow prevention structure of the flowing water ball | bowl overflow pipe of this invention. It is a principal part expanded sectional view which illustrated A section of Drawing 1, (A) shows the state where hot water is drained from the overflow hole, and (B) shows the normal state where hot water is not drained from the overflow hole Yes. FIG. 2 is a main part enlarged perspective view illustrating an A part of FIG. 1. It is the figure which illustrated typically the overflow pipe of the conventional washstand, (A) is a whole perspective view, (B) has shown sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Washing ball 2 Overflow pipe 3 Drain outlet 4 Drain plug 5 Overflow hole 6 Backflow prevention valve 61 Lower end part 7 Opening part 8 Drain pipe W Drainage direction of drainage from overflow hole 101 Washing ball 102 Overflow hole 103 Overflow pipe 104 Drainage port 105 Drain plug 106 Drain pipe

Claims (1)

  At the connection point between the overflow pipe connected to the overflow hole of the flowing water ball and the drain plug installed at the drain outlet, it opens inside the drain plug only by the inflow of drainage from the overflow hole of the flowing water ball to the overflow pipe. A backflow prevention structure for a flowing water ball overflow pipe, wherein a backflow prevention valve is provided.

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