JPH0246539Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a type of flush toilet in which flush water is jetted from a rim passageway at the upper end of the toilet.

[Conventional technology]

Some conventional flushing toilets are of the siphon jet type, in which flushing water is supplied from both a water inlet provided in a rim passageway at the upper end of the bowl and a spout at the lower part of the bowl.

However, this type of toilet bowl has the disadvantage that the air from the rim passageway is not discharged quickly, and the flushing noise is loud. Furthermore, since cleaning water containing air bubbles is supplied from the water injection port, a decrease in the ability to clean the ball surface is unavoidable.

In response to such problems, the applicant has filed a
In No. 89306 (Utility Model Application Publication No. 61-206782), a flush toilet was proposed which was equipped with an air vent pipe whose rim passageway cross section extended upward and whose lower end opened toward the ball portion.

This has a mounting hole on the bottom wall of the rim water passage,
A pipe-shaped air vent tube is inserted and fixed through this attachment port, so that air can be quickly discharged from the rim passageway at the same time as the flushing water starts flowing. By locating this air vent pipe within the rim passageway, it is possible to promote the discharge of air, and by reducing the cleaning noise, it is possible to prevent a decrease in the cleaning performance at that time.

[Problem that the invention attempts to solve]

By the way, since the toilet bowl body is made of ceramic, the surface accuracy is relatively low, and it is quite difficult to manufacture the detailed shape according to the designed dimensions. Therefore, it is inevitable that the inner diameter of the attachment port of the air vent pipe and the surface roughness of the inner circumferential surface will vary from product to product.

Due to such manufacturing problems, a flange is provided at the lower end of the air vent pipe to abut against the lower wall surface of the rim passageway in order to seal the mounting opening.

However, since the sealing surface is only at this flange portion, there is a problem in that if the air vent pipe is not sufficiently fixed to the attachment port, sealing failure will occur and water will leak. Furthermore, since the surface accuracy of the toilet bowl is low as described above, in a configuration in which the sealing surface pressure is applied only in the axial direction of the air vent pipe, there is a possibility that the frequency of seal failures will increase.

The present invention was devised in view of such problems, and its purpose is to reliably maintain the seal of the air vent pipe portion fixed to the rim passageway and prevent water leakage.

[Means and actions for solving problems]

In order to achieve the above object, the present invention forms a rim water passage all around the upper end of the ball part of the toilet bowl body, and also provides a water injection port in the bottom wall of the rim water passage towards the ball part. In the flush toilet,
An air vent pipe extending upward through the cross section of the rim water passageway is inserted and fixed into a mounting hole provided through the bottom wall, and the air vent pipe has a flange formed at its lower end that tightly contacts the lower surface of the bottom wall, and the air vent pipe extends upward from the flange. An elastically deformable protruding piece is provided at a distance approximately equal to the thickness of the bottom wall, and a seal ring is further provided between the flange and the protruding piece to tightly contact the inner periphery of the attachment port. .

The air vent pipe inserted through the mounting port seals the rim passageway with a flange at the lower end and a seal ring installed halfway, and the seal ring is always attached even if the flange and the bottom wall of the rim passageway loosen. Seal around the inside of the mouth.

〔Example〕

Hereinafter, the present invention will be specifically described based on embodiments shown in the drawings.

Figure 1 is a plan view of the flush toilet according to the present invention;
The figure is a sectional view taken along the - line arrow in Figure 1.
The figure is an enlarged sectional view taken along the same line, and FIG. 4 is a perspective view of the air vent pipe.

In the figure, a rim passageway 4 with a water injection port 3 is formed at the upper end of the ball part 2 of the toilet main body 1 to communicate with a flushing water supply chamber 5, and the rim passageway 4 is further connected to an opening 6 and a communication passageway. 7 communicates with a spout 8 at the bottom of the ball portion 2.

Cleaning water flows into the supply chamber 5 from a cleaning water tank (not shown) attached to the toilet main body 1.
The water flows in two directions through the rim passageway 4 and is discharged from the water injection port 3 that passes through the rim water passageway 4 to the ball portion 2.
and is injected from the jet port 8 via the communication channel 7.
At this time, the waste is discharged from the drain port 9 due to the siphon effect based on the shape of the drain flow path 10 formed between the ball portion 2 and the drain port 9.

Reference numeral 15 denotes an air vent pipe disposed inside the rim passageway 4, and as shown in FIG.
It is fitted into the mounting hole 17 opened at 6 from below and fixed.

This air vent pipe 15 is made of elastically deformable hard urethane or the like. As shown in FIG. 4, a flange 18 is formed at the lower end, and protrusions 19 are provided at four equally spaced circumferential pitches between the flange 18 and the flange 18 at a distance approximately equal to the thickness of the bottom wall 16. . Further, a seal ring 20 is formed between the flange 18 and the protruding piece 19, and the seal ring 20 is in close contact with the inner periphery of the attachment port 17. In addition, the protruding piece 19
Forms a tapered surface 21 whose longitudinal section tapers toward the upper end, and a radially protruding portion at the lower end serves as an engagement surface 22 with respect to the bottom wall 16.

This air vent pipe 15 can be installed by using the tapered surface 21 of the protruding piece 19.
7 can be easily inserted and fixed. Then, as shown in FIG. 3, the engagement surface 22 and the flange 18 sandwich the bottom wall 16 of the rim passageway 4, and the seal ring 20 can be fixed in close contact with the inner circumferential wall of the attachment port 17.

In the above configuration, when the supply of cleaning water is started, the inside of the rim passageway 4 is not filled with water as shown in Fig. 3, and the accumulated air compressed by the inflow of cleaning water increases as the cleaning water level rises. Air vent pipe 15
It is quickly discharged from the upper end. Therefore, the compressed air is exhausted at the beginning of cleaning.
Even if the inside of the rim passageway 4 is filled with water due to the subsequent washing water flowing down, the ratio of the washing water entraining residual air and being discharged from the water injection port 3 as bubbles is reduced, reducing the washing noise. can.

Further, since the seal ring 20 of the air vent pipe 15 is in close contact with the inner wall of the attachment port 17, and the flange 18 is located on the lower surface of the bottom wall 16, the rim passageway 4 can be double sealed. Since the seal ring 20 is in close contact with the inner wall of the mounting port 17 of the air vent pipe 15 regardless of the tightening force in the axial direction of the mounting port 17, even if the air vent pipe 15 is improperly installed or deviates from the predetermined position, the flange 18 Even if the degree of adhesion to the bottom wall 16 is weakened, water leakage can be reliably prevented. In this way, the bottom wall 16 with low surface precision
Compared to a seal structure in which the flange 18 contacts only the lower surface of the flange, the interposition of the seal ring 20 allows for more reliable sealing.

As described above, it is possible to prevent cleaning water from leaking from the attachment port 17 or scattering toward the toilet seat when water is passed through, and the toilet can be used hygienically without causing discomfort.

[Effect of idea]

As explained above, in the flush toilet of the present invention, the air vent pipe is provided with a flange that comes into close contact with the lower surface of the bottom wall of the rim passageway and a seal ring that comes into close contact with the inner periphery of the mounting opening. Can be double sealed to ensure water leakage. Furthermore, even if the position of the air vent pipe is shifted, the seal ring remains in close contact with the inner periphery of the attachment port, so even if the seal provided by the flange becomes defective, water will not leak.

[Brief explanation of drawings]

Figure 1 is a plan view of the flush toilet according to the present invention;
The figure is a sectional view taken along the - line arrow in Figure 1.
The figure is an enlarged sectional view taken along the same line, and FIG. 4 is a perspective view of the air vent pipe. 1: Toilet bowl body, 2: Ball part, 3: Water outlet,
4: Rim channel, 5: Supply chamber, 6: Opening, 7: Communication channel, 8: Spout, 9: Drain port, 10: Drain channel, 15: Air vent pipe, 16: Bottom wall, 17: Installation Mouth, 18: Flange, 19: Projection piece, 20: Seal ring, 21: Tapered surface, 22: Engagement surface.

Claims (1)

[Scope of Claim for Utility Model Registration] A flush toilet in which a rim passageway is formed around the entire upper end of the ball portion of the toilet body, and a water injection port is provided in the bottom wall of the rim passageway toward the ball portion, An air vent pipe extending upward through the cross section of the rim water passageway is inserted and fixed into a mounting hole provided through the bottom wall, and the air vent pipe has a flange formed at its lower end that tightly contacts the lower surface of the bottom wall, and the air vent pipe extends upward from the flange. An elastically deformable protruding piece is provided at a distance approximately equal to the thickness of the bottom wall, and a seal ring is further provided between the flange and the protruding piece to tightly contact the inner periphery of the attachment port. Flush toilet.