JP7675967B2 - Drain cover - Google Patents

Description

The present invention relates to a drain cover used for a drain formed in a tank body.

A basin such as a washbowl or hand-washing bowl has a drain outlet formed on the bottom. A drain pipe consisting of a drain trap, etc. is connected to the downstream side of the drain outlet, and hot and cold water is drained from the basin.

The tank body becomes dirty with use due to water stains and slime. Dirt tends to accumulate particularly around the periphery of the drain outlet and inside the drain outlet, and when the dirt is visible, it causes discomfort to the user.
Therefore, as described in the patent documents, a structure is known in which a drain cover is attached to the drain to cover up dirt and improve the design of the tank body.

JP 2008-255598 A

When the user placed a bucket or washbasin inside the tank, the drain cover was subjected to impact and was sometimes damaged.

The present invention was invented in consideration of the above problems, and aims to improve the design by covering and concealing the drain, while also preventing damage to the drain cover.

The first invention includes a cover portion for covering a drain outlet of a tank body,
a support shaft having the lid portion attached to an upper end thereof,
A drain cover that forms a water passage space between the lid portion and the drain,
The lid portion is capable of descending when an impact is applied thereto,
This drain cover is characterized in that the water flow space is not blocked even when the lid is lowered, allowing hot and cold water to be drained from within the tub body.

With this drain cover, the design can be improved by covering the drain with the lid, and the lid can prevent damage by descending when an impact is applied.
Furthermore, since the water passage space is not blocked even when the lid is in the lowered position, hot water can be prevented from overflowing from the tub body.

In a second aspect of the present invention, the drain cover is provided with a spring,
In the drain cover according to the first aspect of the present invention, the lid portion is lowered by the elasticity of a spring.

This drain cover allows the lid to be lowered by the elasticity of the spring, cushioning the impact and allowing the cover to return to its original state. This not only ensures that damage is prevented, but also allows the drain cover to be used even after damage has been prevented, improving the design of the tank body.

In a third aspect of the present invention, the lid portion is
The drain cover according to the first or second invention is characterized in that it is substantially flush with the bottom surface of the tank body or can be lowered below the bottom surface.

With this drain cover, the lid is roughly flush with the bottom surface of the tank body or lowers below the bottom surface, allowing the bottom surface of the tank body to absorb impacts.

In a fourth aspect of the present invention, the lid portion is
This is a drain cover described in any one of the first to third inventions, characterized in that it has a cushioning portion that abuts against the peripheral edge of the drain when it is lowered, cushioning the impact to the tank body and the lid portion.

This drain cover makes it possible to prevent damage to the tank body by using a shock absorber. Note that "cushioning the impact on the tank body" also includes absorbing the impact on components attached to the tank body, such as the drain plug body.

According to the present invention, it is possible to improve the design of the tank body and prevent damage to the drain cover even if it is subjected to an impact. In addition, it is possible to prevent hot and cold water from overflowing from the tank body even if water is discharged from the faucet with the lid part in the lowered position.

FIG. 4 is a cross-sectional view showing the drain outlet cover attached to the tank body. FIG. 4 is a cross-sectional view showing the configuration of the drain outlet cover. FIG. 4 is a cross-sectional view showing a state in which the buffer mechanism is activated. A cross-sectional view showing a state in which a drain outlet cover according to a second embodiment is attached to a tank body. FIG. 4 is a cross-sectional view showing a state in which the buffer mechanism is activated. FIG. 11 is a cross-sectional view showing the configuration of a drain outlet cover according to a third embodiment. This is a cross-sectional view of A-A' in Figure 6. FIG. 4 is a cross-sectional view showing a state in which the buffer mechanism is activated. FIG. 13 is a cross-sectional view showing the configuration of a drain port cover according to a fourth embodiment. This is a cross-sectional view of A-A' in Figure 9. FIG. 4 is a cross-sectional view showing a state in which the buffer mechanism is activated.

The present invention will be described below with reference to the drawings. Note that the invention described below is intended to facilitate understanding of the embodiments, and is not intended to limit or limit the present invention.

The drain cover of this embodiment is attached to a drain 1 formed in the tank body B, as shown in Figures 1 to 3.

The tank body B is a washbowl that is open at the top, and has an opening on its bottom surface, with the drain plug body 2 attached to an inward flange formed at the bottom end of the opening. In addition, a water faucet (not shown) is attached to the edge of the tank body B.

The drain plug body 2 is a hollow cylindrical member having a flange portion 21 at the upper end, and inside it is formed a drain port 1 for discharging hot and cold water etc. from the tank body B, and a male screw is threaded on the outer periphery. The drain plug body 2 is inserted from above into an opening formed in the bottom surface of the tank body B, and is screwed into a drain pipe 3 on the back side of the tank body B.
The step 22 is a stepped portion formed on the inner surface of the drain plug body 2 so as to protrude inward, and the drain port cover 4, which will be described later, is placed on it.

The drain pipe 3 is a pipe that discharges wastewater that flows in from the drain outlet 1 to the downstream side, and has a female thread formed at the upper end, which is screwed into the drain plug body 2 via a packing to clamp the flange of the opening formed on the bottom surface of the tank body B. The drain pipe 3 also has a drain trap (not shown) that forms a water seal in the flow path, preventing odors and pests from entering the house from the downstream side.

As shown in Figure 2, the drain outlet cover 4 is composed of a lid portion 5, a support shaft 6, a cylindrical portion 7, a collection portion 8, and a spring 9. The drain outlet cover 4 covers the periphery of the drain outlet 1 with the lid portion 5, improving the design of the tank body B, and drains hot and cold water from the tank body B through the water passage space S formed between the lid portion 5 and the drain outlet 1.
In addition, the drain cover 4 is provided with a shock absorbing mechanism that, when an impact is applied to the lid portion 5, causes the lid portion 5 to descend to absorb the impact.

The cover 5 is disk-shaped with an outer diameter substantially the same as that of the flange 21, and the support shaft 6 is detachably fitted to the underside of the cover 5. The cover 5 can be lowered by the elasticity of the spring 9 when an impact is applied in the axial direction of the support shaft 6.
The outer diameter of the lid 5 is smaller than the inner diameter of the opening formed in the bottom surface of the tank body B.

The support shaft 6 is rod-shaped and supports the lid portion 5, with the lid portion 5 attached to its upper end and the lower end housed within the cylindrical portion 7. The protrusion 61 protrudes outward from the middle of the support shaft 6, with its upper surface abutting against the cylindrical portion 7 and its lower surface abutting against the spring 9.

The cylindrical portion 7 is a hollow cylinder that houses the support shaft 6 and the spring 9 therein, and has an inner flange 71 formed at its upper end and a hole 72 that engages with a cap 73 formed at its lower end.
The inner flange portion 71 protrudes inward from the upper end of the cylindrical portion 7 , and its inner diameter is approximately the same as the outer diameter of the support shaft 6 .
The hole 72 is an opening that penetrates the inside and outside of the cylindrical portion 7, and a claw portion 74 of a cap 73 is engaged with the hole 72.
The cap 73 is attached to the lower end of the cylindrical portion 7 and is a member that closes the lower end of the cylindrical portion 7 , and is attached by engaging the claw portions 74 with the holes 72 .

The collection section 8 is formed at the upper and lower ends of the tubular section 7, and is composed of a circular ring-shaped section 81 having an outer diameter approximately the same as the inner surface of the drain plug body 2, and a mesh-like rib 82 that collects hair and other particles mixed in with the drainage discharged from the tank body B. In addition, the ring-shaped section 81 formed on the upper end side of the tubular section 7 is placed on the step section 22 of the drain plug body 2.

The spring 9 is a metal wire wound in a spiral shape, and is an elastic member that contracts when it receives an impact in the axial direction. The spring 9 is disposed inside the cylindrical portion 7, between the support shaft 6 and the cylindrical portion 7, and is sandwiched between the protrusion 61 of the support shaft 6 and the cap 73 in the vertical direction.

The assembly of the drain cover 4 is described below.

First, the support shaft 6 is inserted from below into the cylindrical portion 7. At this time, the upper end of the support shaft 6 penetrates the inner flange portion 71 and protrudes upward from the cylindrical portion 7. On the other hand, the outer diameter of the protrusion 61 is larger than the inner diameter of the inner flange portion 71, so that the support shaft 6 will not come off.
Next, the spring 9 is placed inside the cylindrical portion 7 .
Next, the cap 73 is attached from below the cylindrical portion 7. At this time, the claws 74 engage with the holes 72 to close the lower end of the cylindrical portion 7, and the spring 9 is sandwiched between the lower surface of the protrusion 61 of the support shaft 6 and the upper surface of the cap 73.
Finally, the lid portion 5 and the support shaft 6 are fitted together to complete the assembly of the drain cover 4.

The drain cover 4 assembled as described above is equipped with a shock absorbing mechanism that absorbs shocks applied to the components and prevents damage. The operation of the shock absorbing mechanism is explained below.

First, as shown in Figure 1, when the drain cover 4 is attached to the tank body B, the collection part 8 is placed on the step part 22. At this time, the spring 9 of the drain cover 4 is in an extended state, and the lid part 5 is located at a position separated from the drain 1, and the design of the tank body B is improved by covering and concealing the periphery of the drain 1 and the inside of the drain 1 so that they cannot be seen by the user.
In this state, if a bucket or washbasin (not shown) is placed in the tank body B and a strong downward impact is applied to the lid 5, the buffer mechanism is activated. That is, as shown in Figure 3, the impact causes the lid 5 and the support shaft 6 to descend, and the spring 9 contracts to buffer the impact and prevent the drain cover 4 from being damaged.

When the bucket or washbasin is removed, the restoring force of the spring 9 causes the lid 5 to rise again and return to the position shown in Figure 1.

The drain cover 4 does not block the water passage space S even when the cushioning mechanism is activated and the lid 5 is lowered. Therefore, even if a bucket or the like is placed on the lid 5 and water is discharged from the faucet while the cushioning mechanism is activated, the discharged hot water passes between the lid 5 and the opening formed in the bottom surface of the tank body B, and is discharged from the water passage space S to the drain 1. This prevents hot water from overflowing from the tank body B.

The above describes the first embodiment of the present invention. According to the present invention, the drain cover 4 is equipped with a cushioning mechanism, which makes it possible to prevent damage to the components even if a strong impact is applied to the drain cover 4, particularly the lid portion 5.
In the first embodiment, the lid 5 can be lowered below the bottom surface of the tank body B. Therefore, when the lid 5 is lowered by the buffer mechanism to be substantially flush with the bottom surface of the tank body B or to be lower than the bottom surface of the tank body B, the impact applied to the drain outlet cover 4 is received by the tank body B, and damage to the drain outlet cover 4 can be reliably prevented.
In addition, in the present invention, the water passage space S is not blocked even when the lid portion 5 is lowered. This makes it possible to drain hot and cold water from the tank body B even when a bucket or the like is placed on the top of the drain cover 4.
Furthermore, as mentioned above, the lid portion 5 has a smaller diameter than the opening formed on the bottom surface of the tank body B, so even if the lid portion 5 is approximately flush with the bottom surface of the tank body B or lowered below the bottom surface of the tank body B, hot water can be drained from the water passage space S through the lid portion 5 and the above-mentioned opening.
3, the lid 5 is positioned away from the top surface of the drain plug body 2 even when the buffer mechanism is activated, but the lid 5 lowered by the buffer mechanism may come into contact with the drain plug body 2. Even in this case, since no water-stopping member such as a packing is attached to the lid 5, the water passage space S is not blocked even when the lid 5 is lowered, and hot and cold water in the tub body B can be drained.

[Second embodiment]
4 and 5, when the lid 5 descends, the support shaft 6 comes into contact with the bottom of the cylindrical portion 7, and the lid 5 cannot descend any further. Here, the height H1 to which the lid 5 can descend when the buffer mechanism is activated is smaller than the height H2 of the water passage space, so that even when the lid 5 descends to its limit, the water passage space S is not blocked and hot and cold water can be discharged from the tank body B.
In this embodiment, the lower end of the support shaft 6 is guided by the cap 73. This makes it possible to prevent the support shaft 6 from tilting even if an impact is applied to the lid portion 5.

[Third embodiment]
In this embodiment shown in FIGS. 6 to 8, a plurality of protrusions 51 are formed on the lower surface of the lid portion 5. As shown in FIG.
When the buffer mechanism is activated and the lid 5 is lowered, the protrusions 51 come into contact with the upper surface of the drain plug body 2. At this time, the water passage space S is maintained between the protrusions 51, allowing hot and cold water to be drained from the tank body B. That is, in this embodiment, the water passage space S is prevented from being blocked by the protrusions 51, and hot and cold water can be drained from within the tank body B even when the buffer mechanism is activated.

[Fourth embodiment]
9 to 11, a plurality of buffer parts 52 are formed on the lower surface of the lid part 5. In this embodiment, the lid part 5 does not descend below the bottom surface of the tank body B.
The buffer parts 52 are made of a soft material such as rubber or silicone, and when the buffer mechanism is activated and the lid part 5 descends, they come into contact with the periphery of the drain outlet 1. At this time, the buffer parts 52 deform to buffer the impact on the tank body B and the lid part 5, making it possible to prevent damage to the tank body B and the drain plug body 2. Furthermore, by maintaining the water passage space S between the buffer parts 52, hot water can be drained from the tank body B. That is, in this embodiment, the buffer parts 52 prevent the water passage space S from being blocked, and hot water can be drained from the tank body B even when the buffer mechanism is activated.

Although all the embodiments of the present invention have been described above, the present invention is not limited to the shapes of the above-mentioned embodiments, and various modifications may be made. For example, in the first embodiment, the lid 5 can be lowered below the bottom surface of the tank body B, but it may be lowered to a position where it is approximately flush with the bottom surface of the tank body B. Even in this case, the tank body B can receive the impact applied to the drain cover 4, thereby preventing damage to the drain cover 4.
In addition, in the third embodiment, the protrusion 51 ensures the water passage space S when the buffer mechanism is operating. However, instead of the protrusion 51, a plurality of recessed grooves may be formed in the lower surface of the lid portion 5.
In addition, although the tank body in each embodiment is a washbowl, it may be a hand-washing bowl installed in a toilet, a kitchen sink, or a bathtub in a bathroom.

B Tank body 1 Drain port 2 Drain plug body 21 Flange portion 22 Step portion 3 Drain pipe 4 Drain port cover 5 Lid portion 51 Protruding portion 52 Buffer portion 6 Support shaft 61 Projecting portion 7 Cylindrical portion 71 Inner flange portion 72 Hole 73 Cap 74 Claw portion 8 Collection portion 81 Annular portion 82 Rib 9 Spring S Water passage space

Claims (4)

A lid for covering a drain outlet of the tank body;
A support shaft having the lid portion attached to an upper end thereof ;
a spring that is in contact with the support shaft and is contractible in an axial direction of the support shaft ,
A drain cover that forms a water passage space between the lid portion and the drain,
The cover does not have a waterproofing member attached thereto,
The lid portion can be lowered by the contraction of the spring when an impact is applied,
This drain cover is characterized in that the water flow space is not blocked even when the lowered lid portion abuts against the periphery of the drain , allowing hot and cold water to be drained from within the tank body. A lid for covering a drain outlet of the tank body;
A support shaft having the lid portion attached to an upper end thereof ;
a spring that is in contact with the support shaft and is contractible in an axial direction of the support shaft ,
A drain cover that forms a water passage space between the lid portion and the drain,
The lid portion can be lowered by the contraction of the spring when an impact is applied,
The height to which the lid portion can be lowered is smaller than the height of the water passage space,
This drain cover is characterized in that the water flow space is not blocked even when the lid is lowered to its limit , allowing hot and cold water to be drained from within the tank body. The lid is disposed inside an opening formed on the bottom surface of the tank body,
The top of the lid portion upper surface is
3. The drain cover according to claim 1, which is capable of being lowered to a position substantially flush with the opening or lower than the opening . The lid portion is
4. The drain cover according to claim 1, further comprising a cushioning portion that contacts the periphery of the drain when the drain cover is lowered, cushioning impact to the tank body and the lid portion.

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