JPH0235895Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] The present invention branches the waterway on the outflow side of the ball tap to provide a tank supply waterway and an auxiliary water supply waterway, and connects this auxiliary water supply waterway to an overflow pipe. This invention relates to an improvement in a tank device for flushing a toilet bowl, which supplies a portion of the discharged water as sealing water to the toilet bowl.

[Prior art]

This type of conventional toilet bowl cleaning tank device causes the following disadvantages.

In other words, when draining from the cleaning tank to the toilet bowl is completed and the drain valve is closed, the water level in the cleaning tank rises again, the floating ball rises, and the associated ball tap valve gradually closes. When the water level in the cleaning tank rises to a certain level, the valve is completely closed and water supply to the cleaning tank is stopped. However, in a device configured such that the waterway on the outflow side of the ball tap is branched into a tank supply channel and an auxiliary water supply channel, the auxiliary water supply is extended to an overflow pipe whose upper end opens below the outflow side of the ball tap. The tract will form a siphon tube. Therefore, when the valve opening is large and the amount of water supplied is large, the pressure on the outflow side of the ball tap is high and water flows sufficiently toward the tank supply channel, but when the valve opening is extremely narrowed, Due to the extremely low pressure on the outflow side of the ball tap, all the water is sucked into the auxiliary water supply channel due to the siphon action and flows into the overflow pipe, stopping the outflow toward the tank water supply channel. As a result, the water level in the cleaning tank completely stopped rising, and due to the resistance of the water flow, the valve body did not close and remained slightly open.
This results in water continuing to flow into the toilet bowl through the auxiliary water supply channel. Furthermore, when a water film is formed due to surface tension at the branching portion of the ball tap to the tank water supply channel on the outflow side, this water film promotes the above-mentioned effect.

In particular, in a structure in which a rectifying net is attached to the outflow end of the tank water supply channel in order to reduce the noise of water supply to the tank, a water film tends to form on the rectifying net.
Siphon phenomenon is likely to occur.

Therefore, in order to prevent the occurrence of the above-mentioned undesirable situation, conventional techniques such as the
As described in the specification and drawings of No. 91939 (Utility Model Application Publication No. 52-5462), the inner diameter of the auxiliary water pipe that forms the auxiliary water supply channel that communicates the outflow side of the ball tap with the overflow pipe is determined by its discharge opening. The auxiliary water supply channel is prevented from forming a siphon pipe by expanding it to a position above the valve seat surface of the ball tap. Not only is it necessary to use a water pipe with a special structure in which the inner diameter changes, but the enlarged diameter part that forms the discharge opening may bend inward for some reason, reducing its water flow area. There was a disadvantage that the siphon effect could not be prevented by doing so.

In addition, in the tank device in the above application, a vacuum breaker is provided in the tank supply waterway, which prevents water in the tank from flowing into the water supply side when the pressure on the water supply side with respect to the ball tap decreases. It has no effect at all to prevent siphon action from occurring in the auxiliary water supply channel.

[Purpose of invention]

This invention reliably prevents siphon action from occurring in the auxiliary water supply channel, and even after the water level in the tank rises and the opening of the ball tap valve is tightened to the extreme, the tank water supply channel can be passed through the tank. The purpose is to prevent water from being wasted into the overflow pipe through the auxiliary water supply channel by continuing to supply water to the tank and completely closing the valve.

[Structure of the idea]

The present invention connects a joint in which an inlet end, a tank water supply port, and an outflow end are formed in this order to the outflow side of a ball tap, and the other end of the outflow end of the joint is opened into the inside of the overflow pipe. In a tank device for flushing toilet bowls, in which one end of the auxiliary water pipe is connected to form an auxiliary water supply channel by the outflow end portion of the joint and the auxiliary water pipe, the discharge device is provided with a rectifying net at the tank water supply port. and an air hole is bored in the outflow end of the joint at an angle with respect to the flow path axis of the joint so that the outside air open end is located upstream of the internal open end of the joint. Further, a constriction portion is formed in the flow path between the air hole and the tank water supply port.

By sucking air into the auxiliary water supply channel with the above configuration, the siphon effect in the auxiliary water supply channel, which is particularly likely to occur when a discharge device equipped with a rectifying mesh inside is connected to the tank water supply port, can be prevented. This can be reliably prevented from occurring.

〔effect〕

The present invention achieves the following effects with the above configuration.

The joint has a flow path to the tank water supply port and the auxiliary water supply channel, and this joint also has a constriction part and air hole to prevent siphons, so just connect the joint to the main body of the ball tap to connect the tank side and the auxiliary water supply channel. Water can be supplied and siphon phenomenon can be prevented. Therefore, there is no need to perform complicated processing on the ball tap body, and the product can be provided at low cost.

The air holes are slanted with respect to the flow path axis of the joint so that air can easily enter and water is difficult to leak. It is possible to reliably prevent the occurrence of siphon phenomenon on the auxiliary water supply side.

〔Example〕

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

1 to 4 show a first embodiment of the present invention, in which 1 is a cleaning tank, 2 is a drain valve provided at the bottom of the cleaning tank 1, and 1 is a cleaning tank 1. The drain valve 2 is fully opened by pulling up the drain valve body 2a from the drain valve seat 2b by operating an operating lever (not shown) provided on the side wall of the drain valve 2.
The water in the cleaning tank 1 is discharged into the toilet bowl (not shown), and as the water level in the tank 1 decreases, the drain valve body 2
a again sits on the drain valve seat 2b and closes the drain valve 2. Further, an overflow pipe 3 is provided in the cleaning tank 1, and the cleaning tank 1 is communicated with the toilet bowl via the overflow pipe 3 and the drain valve 2.

Further, numeral 4 in the figure is a ball tap installed at the upper part of the cleaning tank 1 and connected to the water supply pipe 5.
This is equipped with a valve 6 and a floating ball 7, and the vertical movement of the floating ball 7 in response to changes in the water level in the cleaning tank 1 automatically opens and closes the valve 6 via a link mechanism 8. When the water level drops, the valve 6 opens, and when the water level rises, the valve 6 closes to stop the water supply. Reference numeral 25 is a regulating valve provided on the ball tap main body 24 for regulating the amount of water supplied.

In addition, this ball tap 4 is installed so that the valve seat surface 9 of the valve 6 is located at a higher level than the upper opening edge of the overflow pipe 3, that is, the overflow water surface, thereby preventing the water in the cleaning tank 1 from flowing back to the inlet side 10. be done.

Further, the outflow side 11 of the ball tap 4 has an inflow end portion 27 and an outflow end portion 12 connected to this outflow side.
A joint 26 having a tank water supply port 13 provided between the two parts is connected, and an auxiliary water pipe 14 is connected to the outflow end part 12 of the joint 26, and auxiliary water is supplied by the outflow end part and the auxiliary water pipe. By forming a channel 15 and attaching the tip of the auxiliary water pipe 14 to the upper opening edge of the overflow pipe 3 using a fitting 16 having a substantially S-shape as shown in the figure, the tip of the auxiliary water supply channel 15 is connected to the overflow pipe. 3, while the tank water supply port 13
As shown in FIG. 3, a tank water supply channel 18 that opens directly into the cleaning tank 1 is formed by connecting a discharge tool 17 having a rectifying net 19 attached therein.
The tank water supply port 13 and the discharge tool 17 are inclined toward the inner wall surface of the cleaning tank 1, so that the water discharged from the discharge port 17 flows down the inner wall surface of the cleaning tank 1. It is quietly supplied into the tank and does not disturb the water surface.

Reference numeral 20 in the drawings indicates an air hole, which is provided in a portion of the outflow end portion 12 of the joint 26 in the vicinity of the tank water supply port 13 in the drawings of the embodiment. This air hole 20 is opened upward and its opening direction is from the outflow side 11 of the ball tap 4 to the auxiliary water pipe 14.
By opening the hole at an angle opposite to the flow direction of the water supplied to the hole, that is, so that the outer end is located upstream of the inner end, the inflow of air is facilitated. By forming a constriction portion 21 between the air hole 20 and the tank water supply port 13, the inflow of air can be made easier.

Next, to explain the operation of the first embodiment, first, when the opening degree of the valve 6 is large and the amount of water supplied is large, the pressure on the outflow side 11 of the ball tap is also high, and therefore the water on the outflow side 11 is The water is divided into an auxiliary water pipe 14 connected to the section 12 and a discharge device 17 connected to the tank water supply port 13, and is simultaneously supplied into the cleaning tank 1 and the overflow pipe 3, respectively. Water flows into the toilet bowl to ensure a water seal in the trap (not shown).

Next, from the tank water supply port 13 to the tank water supply channel 18
The water level in the cleaning tank 1 rises due to the water supplied through the tank 1, and as the floating ball 7 rises as the water level rises, the opening degree of the valve 6 is throttled through the link mechanism 8, reducing the amount of water supplied. At this point, the pressure on the outflow side 11 of the ball tap 4 decreases, and as the pressure on the outflow side 11 decreases, air flows into the auxiliary water supply channel 15 through the air hole 20.

Furthermore, as shown in FIG.
1, the speed of the supplied water increases at the constriction portion 21 and flows down toward the outflow end portion 12 side. At this time, the pressure near the downstream side of the throttle section 21 decreases due to the increase in the water supply speed, and also decreases due to pressure loss due to the sudden expansion of the flow path, and this pressure decrease causes further air to flow out from the air hole 20. It gets sucked in. That is, by utilizing the bench lily effect (or ejector effect) caused by the flow of water supply, the air holes 2
From 0, air can be sucked without waiting for the pressure on the outflow side 11 to decrease.

Furthermore, as shown in the figure, the streamlines F of the supplied water flow in a rapidly expanding flow path from the constriction part 21 to the outflow end 12, so the flux of streamlines F becomes radial and gradually expands toward the downstream side, The annular area immediately after becomes a stagnation point. Therefore, the water supply head becomes extremely small at the opening portion of the air hole 20, and the above-mentioned air suction can be made smooth, and there is no leakage to the outside.

As a result of the above, no siphon action occurs in the auxiliary water supply channel 15, and therefore the water on the outflow side 11 is not drawn only in the direction of the outflow end portion 12, but also branches and flows in the direction of the tank water supply port 13. Since water continues to be supplied into the cleaning tank 1 from the tank water supply channel 18, the water level in the cleaning tank 1 continues to rise, and when it reaches the planned water level, the valve 6 is completely closed. be.

Next, FIGS. 6 to 8 show a second embodiment of the present invention, in which a tank water supply channel is provided between the inflow end portion 27 and the outflow end portion 12 of the joint 26 connected to the outflow side 11 of the ball tap 4. Tank water supply port 1 leading to 18
3, a through hole 23 communicating with the water supply channel 22 for hand washing is provided so that water for hand washing can also be supplied when the valve 6 is opened. The same is true.

As described above, it is possible to reliably prevent the occurrence of siphon action in the auxiliary water supply channel, which is particularly likely to occur when a rectifying net is attached to the discharge pipe connected to the tank water supply port for the purpose of reducing water supply noise. Therefore, the water level in the cleaning tank can be reliably raised to the expected water level, the valve can be completely closed, and water will not be wasted away, resulting in great practical effects. Moreover, compared to changing the inner diameter of the auxiliary water pipe that forms the auxiliary water supply channel midway through or installing a vacuum breaker, it is possible to simply provide a constriction part and drill an air hole adjacent to the constriction part on the downstream side. Because there is
The structure is simple, and air can be reliably flowed in using the ventilate effect created by installing the throttle part, and there is no risk of water spewing out from the air hole.Furthermore, there is no need to perform any processing on the ball tap body. It is possible to branch the tank water supply channel and the auxiliary water supply channel without having to install any separate parts, and the production cost is not only low, but also can be easily and easily implemented in the existing tank system for flushing toilets. Can be done.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a first embodiment of the present invention, Fig. 2 is a partially cutaway front view of the same embodiment, and Fig. 3 is a plan view showing a first embodiment of the present invention.
Fig. 4 is a partially cutaway front view showing the usage state of the same embodiment, Fig. 5 is a sectional view showing the flow inside the joint, and Fig. 6 is the second embodiment of the present invention.
FIG. 7 is a partially cutaway plan view showing the embodiment, FIG. 7 is a partially cutaway front view of the same embodiment, and FIG. 8 is a longitudinal sectional side view taken along the line of FIG. 6. 3: Overflow pipe, 4: Ball tap,
6: Valve, 11: Outflow side of ball tap, 12: Outflow end of joint, 13: Tank water supply port, 14: Auxiliary water pipe, 15: Auxiliary water supply channel, 17: Discharge tool, 1
8: Tank water supply channel, 19: Rectification net, 20: Air hole, 21: Throttle part, 24: Ball tap body,
26: Joint, 27: Inflow end portion of the joint.

Claims (1)

[Scope of utility model registration request] A joint in which an inlet end, a tank water supply port, and an outlet end are formed in this order is connected to the outflow side of the ball tap, and an auxiliary water pipe whose other end is opened inside the overflow pipe is connected to the outflow end of the joint. In a toilet flushing tank device in which one end is connected to form an auxiliary water supply channel by the outflow end portion of the joint and the auxiliary water pipe, a discharge device provided with a rectifying net is connected to the tank water supply port. , an air hole is formed in the outflow end portion of the joint at an angle with respect to the flow path axis of the joint so that the outside air open end is located upstream of the internal open end of the joint; A tank device for cleaning a toilet bowl, characterized in that a constriction part is formed in a flow path between an air hole and the tank water supply port.