JP7139003B2 - piping structure - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping structure for discharging hot water generated by use of equipment such as a washbasin, a sink, a bathtub, etc. toward sewage.

As a conventional technique, a piping structure including a tank body, a drain plug, and a drain member is known.
The tank body has a bottom wall portion extending downward from the bottom portion, and a recessed portion including an inner flange projecting inwardly from the lower end of the bottom wall portion. Further, a drainage port is opened inside the inner collar portion so as to extend vertically through the bottom portion of the tank body.
The drain plug is arranged in the recess, and has a cylindrical portion that is inserted into the drain port and a flange that extends outward from the upper end of the cylindrical portion. In addition, the cylindrical portion is formed with a male screw portion, and by screwing a drain member and a drain plug arranged on the bottom surface of the tank body, the flange portion and the drain member clamp the periphery of the drain port via packing. is doing.
The drain member is connected to the lower end of the drain plug, and drains the drain that has passed through the drain port to the sewage side.

JP 2016-14227 A

The drain plug is placed in the recess, but a slight gap is formed between the inner surface of the bottom wall and the outer surface of the flange. Therefore, if the center of the recess or drain port is different from the center of the drain plug, as shown in FIG. 5, a large gap is formed between the recess and the drain plug, degrading the design. In addition, as a result of the difference between the center of the dent or drain port and the center of the drain plug, tightening is performed while part of the flange portion is not placed in the dent, causing poor installation and damage to the drain plug. There is a risk of becoming. For this reason, the builder must install the drain plug while aligning the center of the drain port with the center of the drain plug. It was very complicated and difficult.
In addition, since the packing is arranged below the flange portion of the drain plug, if the center of the packing and the center of the drain plug are different from each other, there is a risk of water stoppage failure. Therefore, the builder must attach the drain plug while aligning the center of the drain plug with the center of the packing.

Here, as another shape of the drain plug, as shown in FIG. 6, a drain plug in which the upper surface of the flange portion is inclined so as to be continuous with the tank body is known. In the piping structure having the drain plug, the design is improved because the tank body and the drain plug are visually recognized as if they were integrated.
However, at the periphery of the drain port, the inner flange protrudes horizontally in order to contact the packing, so the lower surface of the flange that contacts the inner flange must be approximately horizontal to match the inner flange. There is Therefore, when the upper surface of the flange portion is inclined and the lower surface of the flange portion is substantially horizontal, as shown in FIG. Its thickness becomes thin. Such drain plugs tend to have sink marks during molding due to a large difference in wall thickness at the flange portion. On the other hand, as shown in FIG. 7, when the wall thickness of the drain plug is made almost uniform, a gap occurs between the outer diameter of the cylindrical portion and the inner diameter of the drain port, making it difficult to position the drain plug. becomes. Similarly, it becomes difficult to position the packing arranged on the lower surface of the locking portion.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a piping structure that can easily align the centers of the drain plug and the drain port and can easily position the packing.

The present invention according to claim 1 is a tank body having a drain opening at the bottom,
a drain plug including a tubular portion inserted into the drain port and a flange portion formed outward from the tubular portion;
a drainage member for draining the drainage discharged from the drain plug to a sewage pipe;
In a piping structure consisting of
The drain plug has a projecting portion formed between the outer edge of the flange portion and the cylindrical portion,
A packing is arranged outside the protrusion,
In the piping structure, the projecting portion is arranged inside the drain port when construction is completed, and aligns the drain port, the drain plug, and the packing .

In the present invention according to claim 2, the flange portion is
A locking portion that locks to the periphery of the drain port is provided,
2. The piping structure according to claim 1, wherein the projecting portion is formed inside the engaging portion.

The present invention according to claim 3 is the piping structure according to claim 1 or claim 2, wherein the drain port, the projecting portion, and the cylindrical portion are substantially circular with the same center. .

The present invention according to claim 4 is the piping structure according to any one of claims 1 to 3, wherein the flange portion is inclined upward toward the radial direction outside.

According to the piping structure of the present invention, it is possible to easily align the centers of the drain plug and the drain port. Also, it is possible to easily position the packing. In addition, unlike conventional drain plugs, sink marks and the like do not occur on the drain plug, making it possible to improve the design.

It is a sectional view showing piping structure of the present invention. FIG. 2 is an enlarged view of part A in FIG. 1; It is a sectional view showing a drain plug. It is (a) sectional drawing (b) bottom view which shows the drain plug which concerns on 2nd embodiment of this invention. It is (a) sectional drawing (b) top view which shows the piping structure from which the center of a drain port and a drain plug differed. It is the A part enlarged view of (a) sectional drawing (b) (a) which shows the conventional piping structure provided with the drain plug which the upper surface of a flange part inclines. It is the A part enlarged view of (a) sectional drawing (b) (a) which shows the conventional piping structure provided with the drain plug which thickness is substantially uniform.

Below, the piping structure of this invention is demonstrated, referring drawings. The description given below is intended to facilitate understanding of the embodiments, and is not intended to limit the understanding of the present invention.

A piping structure in the present invention is a piping structure used in a bathtub.
As shown in FIG. 1, the piping structure of the present invention comprises a tank body 1, a drain plug 2, a valve body 3, a transmission member 31, a wire receiver 4, and a drain member 5. is connected to a drain trap (not shown).

The bath body 1 is a bathtub placed in a bathroom, and has a recessed portion 11 formed in the bottom thereof, and a drain port 14 formed in the center of the recessed portion 11 .
The recessed portion 11 includes a bottom wall portion 12 extending downward from the bottom of the tank body 1 and an inner collar portion 13 protruding inward from the lower end of the bottom wall portion 12 in a substantially horizontal direction.
The drain port 14 is formed inside the inner flange portion 13 and is opened so as to vertically penetrate the bottom portion of the tank body 1 .
Here, both the recessed portion 11 and the drain port 14 are circular in plan view, and are formed in concentric circles having the same center. The inner diameter of the recessed portion 11 is slightly larger than the outer diameter of the flange portion 22 of the drain plug 2, which will be described later. As shown in FIG. A small gap is formed between the

The drain plug 2 is arranged in the recessed portion 11, and as shown in FIG. A flange portion 22 is provided.
The cylindrical portion 21 has a hollow cylindrical shape that forms a drainage channel inside, and has an outer diameter smaller than the inner diameter of the inner collar portion 13 and is inserted into the drainage port 14 . A male threaded portion is formed on the outer circumference of the cylindrical portion 21 and is screwed with a female threaded portion of the drainage member 5 arranged on the lower surface of the tank body 1 . A projection 25 is formed on the inner periphery of the tubular portion 21, and the wire receiver 4, which will be described later, is engaged with the projection 25. As shown in FIG.
The flange portion 22 has a flange shape projecting outward from the upper end of the cylindrical portion 21 over the entire circumference, and the upper surface thereof is inclined upward in the radial direction of the drain plug 2 . Further, the flange portion 22 has an engaging portion 23 that engages with the inner collar portion 13 and a projecting portion 24 formed between the engaging portion 23 and the cylindrical portion 21 .
The engaging portion 23 is formed outside the flange portion 22 and is a portion that contacts the inner flange portion 13 via an annular packing 26 when the cylindrical portion 21 is screwed to the drainage member 5 . Since the packing 26 is disposed below the engaging portion 23, the upper surface of the engaging portion 23 is inclined upward toward the radially outer side of the drain plug 2, whereas the lower surface of the drain plug 2 is approximately formed horizontally.
The projecting portion 24 is a thick portion formed along the entire circumference outside the cylindrical portion 21 and inside the locking portion 23 on the lower surface of the flange portion 22. It protrudes downward from the end. Also, the height width L of the projecting portion 24 is greater than the thickness of the packing 26 . The projecting portion 24 is concentric with the cylindrical portion 21 and has an outer diameter substantially equal to the inner diameter of the packing 26 and the inner flange portion 13 . A slight gap is formed between the outer diameter of the protruding portion 24 and the inner diameter of the inner collar portion 13. The gap is formed between the bottom wall portion 12 and the flange portion 22. narrower than Accordingly, when the packing 26 is attached to the drain plug 2, the protruding portion 24 guides the position of the packing 26 so that the drain plug 2 and the packing 26 are positioned on a concentric circle. Further, when the tubular portion 21 is inserted into the drain port 14 , the projecting portion 24 is arranged inside the drain port 14 (the inner collar portion 13 ), and the outer periphery of the projecting portion 24 is in contact with the inner collar portion 13 . The abutment guides the position of the drain plug 2, and aligns the center of the drain port 14 with the center of the drain plug 2. - 特許庁Therefore, the protrusion 24 aligns the drain plug 2, the packing 26, and the drain port 14, and all of them are coaxially arranged.

The valve body 3 is a lid member having a packing fitted on its outer peripheral surface. When the valve body 3 is lowered, the packing contacts the drain plug 2 to watertightly close the drain port 14 . Further, the tip of a valve shaft 32 formed at one end of a transmission member 31 is detachably fitted to the back surface of the valve body 3. As the valve shaft 32 is operated by the operation of an operation unit (not shown), the valve shaft 32 moves upward and downward. It is possible to descend and open and close the drain port 14 .

The transmission member 31 is composed of an outer tube made of resin and an inner wire made of metal, and the inner wire slides inside the outer tube according to the displacement of the operating portion, thereby transmitting the displacement to the valve body 3. A valve stem 32 is provided at the end on the drain port 14 side. The valve shaft 32 has an outer cylinder connected to the outer tube and an inner cylinder connected to the inner wire. When the inner wire slides toward the valve body 3, the inner cylinder protrudes upward. , raises the valve body 3 . On the other hand, when the inner wire slides toward the operating portion, the inner cylinder moves downward, causing the valve body 3 to descend.

The wire receiver 4 has a holding portion that holds the valve shaft 32 in the center, and the valve shaft 32 is arranged in the center of the drain plug 2 . The wire receiver 4 is fixed inside the drain plug 2 by engaging with a projection 25 formed inside the cylindrical portion 21 .

The drainage member 5 is provided with an inlet port 51 at its upper end and with an outlet port 52 at its side surface, and is a member for discharging the drainage water flowing in from upstream toward the side. A branch pipe portion 53 is formed on a side surface different from the discharge port 52, and the transmission member 31 is inserted therethrough. A female threaded portion is formed inside the inflow port 51 and is screwed to the male threaded portion of the drain plug 2 .

The piping structure composed of the above members is constructed as follows. It should be noted that, even if not specifically described, the connection between members that require watertightness is assumed to be watertightly connected via a waterproof member such as an adhesive or packing as necessary. Also, the construction of the piping on the downstream side of the drainage member 5 is omitted.

First, the packing 26 is inserted from below the drain plug 2 and arranged below the flange portion 22 . At this time, since the outer diameter of the protruding portion 24 and the inner diameter of the packing 26 are substantially the same, the position of the packing 26 is guided by the contact of the outer periphery of the protruding portion 24 with the inner periphery of the packing 26. are arranged coaxially.
Next, the drain plug 2 is inserted into the drain port 14 . At this time, since the cylindrical portion 21 has a smaller diameter than the drain port 14, it can be easily inserted through the drain port 14. As shown in FIG. On the other hand, since the outer diameter of the protruding portion 24 is substantially the same as that of the drain port 14, the outer periphery of the protruding portion 24 and the inner periphery of the drain port 14 are in contact with each other, so that the drain plug 2 and the drain port 14 are arranged coaxially. be done. The locking portion 23 of the flange portion 22 contacts the inner flange portion 13 via the packing 26 .
Next, by screwing the drain plug 2 and the drain member 5 together, the periphery of the drain port 14 is sandwiched between the engaging portion 23 and the upper surface of the drain member 5, and the outer periphery of the drain plug 2 and the inner periphery of the inner collar portion 13 are stopped. water is complete. At this time, the protruding portion 24 abuts against the inner periphery of the inner collar portion 13, and the position of the drain plug 2 is guided. can proceed.
Next, an operation portion (not shown) is attached to the edge of the tank body, and the transmission member 31 is pulled out into the drainage member 5 through the branch pipe portion 53 . Then, it is held by the wire receiver 4 , and the wire receiver 4 is fixed inside the drain plug 2 .
Finally, the work is completed by fitting the valve body 3 to the end of the valve shaft 32 .

In the piping structure constructed as described above, the packing fitted around the valve body 3 is in contact with the upper surface of the flange portion 22 of the drain plug 2 when the valve body 3 is lowered. At this time, the drainage channel continuing from the drainage port 14 is blocked, and hot water can be stored inside the tank body 1 .
On the other hand, when an operation portion (not shown) is operated, the inner wire slides in the outer tube toward the drain plug, causing the inner cylinder of the valve shaft 32 to protrude upward from the outer cylinder, thereby lifting the valve body 3. Let At this time, the packing fitted around the valve body 3 is separated from the drain plug 2, thereby opening the drain port 14 and discharging the hot water inside the tank body 1. - 特許庁The lifted state of the valve body 3 is maintained by a lock mechanism (not shown), and the valve body 3 can be switched between the lifted state and the lowered state each time the operating portion is operated.

According to the present invention, the projecting portion 24 is formed on the drain plug 2, and the projecting portion 24 guides the drain plug 2 and the packing 26 so that they are coaxial with each other at the time of installation. guide its position so that it is coaxial. This makes it possible to easily align the drain plug 2, the packing 26, and the drain port 14, thereby improving workability. In addition, since the difference in the thickness of the flange portion 22 of the drain plug 2 can be minimized, the occurrence of sink marks during molding of the drain plug 2 can be prevented and the design can be improved.

Although the first embodiment of the present invention has been described above, the piping structure of the present invention is not limited to the shape of the above-described embodiment, and various modifications may be made without departing from the scope of the invention. . For example, in the first embodiment, the projecting portion 24 was formed over the entire circumference of the drain plug 2, but it may be formed by a plurality of ribs 27 as shown in FIG. In this case, the imaginary line C connecting the outer ends of the plurality of ribs 27 may be regarded as the outer diameter of the projecting portion 24 . At this time, the outer diameter of the projecting portion 24 is substantially the same as the inner diameter of the drain port 14 and the inner diameter of the packing 26 . Further, in the first embodiment, the upper surface of the flange portion 22 of the drain plug 2 is inclined upward toward the radially outer side of the drain plug 2, but it may be formed so as to be substantially horizontal.
In the first embodiment of the present invention, the drain passage is closed by bringing the valve body 3 into contact with the drain plug 2, but the valve body 3 is brought into contact with the peripheral edge of the drain port 14 of the tank body 1 to close the tank. The drainage channel of the body 1 may be blocked. The valve body 3 is connected to the drain plug 2 via a transmission member 31, a valve shaft 32, and a wire receiver 4. When closing the piping structure, if the drain plug 2 is installed at an angle with respect to the tank body 1, there is a risk that the blockage will be incomplete. However, in the present invention, since the position of the drain plug 2 is guided by the protruding portion 24, the drain plug 2 is attached to the tank body 1 at an appropriate position, so that the plug can be reliably closed at the time of blockage. .

1 tank body 11 recessed portion 12 bottom wall portion 13 inner flange portion 14 drain port 2 drain plug 21 cylindrical portion 22 flange portion 23 locking portion 24 projecting portion 25 protrusion 26 packing 27 rib 3 valve body 31 transmission member 32 valve shaft 4 Wire receiver 5 Drain member 51 Inlet 52 Outlet 53 Branch pipe

Claims (4)

a tank body having a drain opening at the bottom;
a drain plug including a tubular portion inserted into the drain port and a flange portion formed outward from the tubular portion;
a drainage member for draining the drainage discharged from the drain plug to a sewage pipe;
In a piping structure consisting of
The drain plug has a projecting portion formed between the outer edge of the flange portion and the cylindrical portion,
A packing is arranged outside the protrusion,
The piping structure according to claim 1, wherein the protruding portion is arranged inside the drain port when construction is completed, and aligns the drain port, the drain plug, and the packing . The flange portion
A locking portion that locks to the periphery of the drain port is provided,
2. The piping structure according to claim 1, wherein the projecting portion is formed inside the engaging portion. 3. The piping structure according to claim 1, wherein the drain port, the projecting portion, and the cylindrical portion are substantially circular with the same center. The piping structure according to any one of claims 1 to 3, wherein the flange portion is inclined upward toward the radial direction outside.

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