JP5453212B2 - Drainage structure - Google Patents

Description

  The present invention relates to a drainage structure for a wash bowl.

  As a conventional drainage structure of a wash bowl, there is one shown in Patent Document 1 (FIG. 2). In this drainage structure, when connecting the drainage cylinder to the drainage hole formed in the bottom of the wash bowl, the flange formed on the upper end of the drainage pipe is hooked on the upper surface of the peripheral edge of the drainage hole. For this reason, the dust collected between the outer peripheral edge of the collar of the drain tube and the bottom of the wash bowl is exposed on the inner face side of the wash bowl, and the appearance is not good.

  Further, FIG. 1 of Patent Document 1 discloses another drainage structure. In this drainage structure, a hole having a larger diameter than the upper part is formed in the lower part of the inner peripheral surface of the drainage hole, and a part of the inner peripheral surface of the hole is formed by the female thread part of the insert nut provided in the bottom part of the wash bowl. Is configured. And the external thread part formed in the upper end part of the drain tube is screwed together by the internal thread part of the said insert nut. In this drainage structure, the upper portion of the hole in the wash bowl is disposed above the upper end of the drain tube, so that the dust collected between the upper end surface of the drain tube and the upper bottom surface of the hole is the wash bowl. It is hard to see from the inner side of and is good looking. In addition, there is an advantage that it can be easily connected to the wash bowl simply by screwing the drain tube into the insert nut.

  However, generally, the wash bowl is made of synthetic resin or earthenware, and the drain tube is made of metal. For this reason, in the drainage structure shown in FIG. 1 and FIG. 2 of Patent Document 1, the texture of the wash bowl and the drain tube is different, and the appearance is not excellent. Further, in the drainage structure shown in FIG. 1 of Patent Document 1, water may leak from between the insert nut and the drain tube, and this water may drip around.

JP 2000-336723 A

  The present invention has been made in view of the above circumstances, is excellent in appearance, can easily connect the drain tube, and water leaks from between the wash bowl and the drain tube and drops to the surroundings. It is an object to provide a drainage structure that can be prevented.

  In order to solve the above problems, the drainage structure of the present invention comprises a synthetic resin wash bowl having a drain hole formed in the bottom, and a synthetic resin drain tube communicating with the drain hole of the wash bowl, A male threaded cylinder that protrudes downward from the periphery of the drainage hole in the bowl and has a male threaded part formed on the outer peripheral surface of the projecting part is provided by insert molding. A flange part formed over the outer periphery of the lower position, and a female screw cylinder part protruding upward from the outer peripheral edge of the flange part and having an internal thread part formed on the inner peripheral surface thereof, the drain cylinder And the upper end portion of the vertical cylinder portion of the drainage cylinder is fitted into the male screw cylinder and disposed below the peripheral edge of the drainage hole of the wash bowl. It is characterized by.

  Moreover, it is preferable that packing is pinched | interposed between the said external thread cylinder and the flange part arrange | positioned below this.

  Moreover, it is preferable that the upper end surface of the said vertical cylinder part contacts the peripheral part lower surface of the drainage hole of the said wash bowl, and the internal peripheral surface of the said drainage hole and the internal peripheral surface of the said vertical cylinder part are flush.

  In this invention, it is excellent in an external appearance, can connect a drain tube easily, and can prevent that water leaks out from between a wash bowl and a drain tube, and is dripped around.

It is sectional drawing which shows the drainage structure of embodiment of this invention. It is sectional drawing which shows the principal part of the die apparatus of a wash bowl.

  Hereinafter, the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing a drainage structure of a wash bowl 1 of the present embodiment.

  The wash bowl 1 is made of a cast molded product and is made of synthetic resin. A cylindrical drain port 2 projecting downward is integrally formed at the bottom of the wash bowl 1, and the inside of the drain port 2 is a drain hole 3 for discharging water in the wash bowl 1. . That is, in the present embodiment, the peripheral edge portion of the drain hole 3 is constituted by the drain port portion 2 protruding from the bottom of the wash bowl 1.

  The drain port 2 is formed in a bell mouth shape whose diameter gradually decreases as it goes downward, and the inner peripheral surface of the drain port 2 is a smoothly continuous curved surface.

  The drain port 2 of the wash bowl 1 is provided integrally with the wash bowl 1 by insert molding with a cylindrical male screw cylinder 4 that opens up and down.

  The male screw cylinder 4 is made of a material (for example, a metal such as stainless steel) having higher strength than the wash bowl 1 and a drain cylinder 10 described later. The upper end portion of the male screw cylinder 4 constitutes an embedded portion 5 embedded in the drain port portion 2. The embedded portion 5 has a recess 6 formed on the outer peripheral surface and the inner peripheral surface, and is formed in a T-shaped cross section that is difficult to come down from the drain port portion 2.

  A portion of the male screw cylinder 4 positioned below the embedded portion 5 is a protruding portion 8 that protrudes downward from the lower edge portion of the drain port portion 2, and a male screw portion 9 is formed on the outer peripheral surface of the protruding portion 8. .

  FIG. 2 is a cross-sectional view of a main part of a mold apparatus 11 for forming the wash bowl 1. The mold apparatus 11 includes an upper mold 12 and a lower mold 13 that can move up and down with respect to the upper mold 12.

  On the lower surface of the upper mold 12 and the upper surface of the lower mold 13, projecting portions 14 and concave portions 15 are respectively formed at locations corresponding to the drain port portion 2.

  The recess 15 is formed in a circular shape in plan view. A cylindrical shaft portion 16 that protrudes upward is formed in the center of the bottom of the recess 15, and an insertion groove portion 17 that is annular in plan view is formed around the shaft portion 16. A plurality of protrusions 19 projecting upward are formed on the outer peripheral end of the bottom of the fitting groove 17 in the circumferential direction.

  A cylindrical insert 18 is fitted into the fitting groove portion 17 from above so that the upper end is located at the same level as the upper end of the shaft portion 16. A plurality of grooves 20 are formed in the outer peripheral end of the lower surface of the insert 18 in the circumferential direction. By fitting the corresponding protrusions 19 of the lower mold 13 into the grooves 20, the rotation of the insert 18 with respect to the lower mold 13 is restricted. Yes.

  The upper end portion of the hole portion 21 formed inside the cylindrical insert 18 becomes a large-diameter hole portion 23 having a larger hole diameter than the lower portion, and a female screw 22 is formed on the inner peripheral surface of the large-diameter hole portion 23. . In the large-diameter hole portion 23, the male screw cylinder 4 is accommodated in a state where the male screw portion 9 is screwed into the female screw 22. The inner peripheral surface of the male screw cylinder 4 is flush with the inner peripheral surface of the hole 21 below the large-diameter hole 23 of the insert 18. Further, only the embedded portion 5 of the male screw cylinder 4 protrudes above the upper end surface of the insert 18.

  In the state where the upper mold 12 and the lower mold 13 are clamped, the lower end surface of the protruding portion 14 is applied to the center of the upper end surface of the shaft portion 16 of the lower mold 13 as shown in FIG. In this clamping state, the cavity 24 for the drain port 2 is formed by the upper mold protrusion 14, the recess 15 of the upper mold 12, the insert 18, and the male screw cylinder 4, and the male screw cylinder 4 is formed in the cavity 24. The embedded portion 5 protrudes. In this clamped state, a molding material is injected into a cavity formed by the upper mold 12 and the lower mold 13 and including the cavity section 24, so that the embedded portion 5 of the male screw cylinder 4 is inserted into the drain port portion 2. The wash bowl 1 with the insert is molded.

  After the molding, the upper mold 12 and the lower mold 13 are opened, and the wash bowl 1 in which the male screw cylinder 4 is integrally provided is taken out together with the insert 18. Then, the insert 18 is removed from the male screw cylinder 4 by rotating the insert 18 with respect to the male screw cylinder 4 and loosening the female screw 22 with respect to the male screw portion 9.

  As shown in FIG. 1, a drain tube 10 for discharging water supplied to the drain hole 3 is connected to the male screw tube 4 insert-molded in the wash bowl 1 in this way.

  The drain tube 10 is provided with a drain valve and a hair catcher (not shown) and is used as a drain plug. The drain tube 10 is made of synthetic resin and has a cylindrical vertical tube portion 25 communicating with the drain hole 3. The inner diameter of the vertical cylinder portion 25 is the same as the lower end opening diameter of the drain hole 3. Further, the drain tube 10 has a flange portion 26 formed over the outer periphery at a position lower than the upper end of the vertical tube portion 25, and protrudes upward from the outer peripheral edge portion of the flange portion 26, and has an internal thread portion on the inner peripheral surface thereof. And a cylindrical female screw cylinder portion 28 formed with 27. The vertical cylinder portion 25 protrudes upward from the concentric female screw cylinder portion 28.

  In order to connect the drain tube 10 to the male screw cylinder 4 provided in the wash bowl 1, the female screw portion 27 of the drain tube 10 is screwed into the male screw portion 9 of the male screw tube 4 and from the flange portion 26 of the vertical cylinder portion 25. Further, the upper end portion protruding upward is fitted into the male screw cylinder 4 and disposed below the drain port portion 2. Here, the male thread portion 9 is screwed into the female thread portion 27 of the drain tube 10 until the upper end surface of the vertical tube portion 25 contacts the lower surface of the peripheral edge of the drain port portion 2.

  When the drain tube 10 is thus connected to the male screw tube 4, the inner peripheral surface of the vertical tube portion 25 is continuous with the inner peripheral surface of the drain port portion 2, and the vertical tube portion 25 is connected to the drain hole 3. Communicate. Further, between the upper surface of the flange portion 26 of the drainage cylinder 10 and the lower end surface of the male screw cylinder 4, and between the upper end outer peripheral surface of the vertical cylinder portion 25 and the inner peripheral surface of the male screw cylinder 4, there are packings 29, 30. Each is sandwiched and sealed. The packings 29 and 30 may be attached to either the drain tube 10 or the male screw tube 4 when the drain tube 10 is connected to the male screw tube 4.

  A drain pipe (not shown) is connected to the downstream side of the drain cylinder 10, and the water flowing into the vertical cylinder portion 25 from the wash bowl 1 through the drain hole 3 can be discharged to the outside through the drain pipe. It becomes possible.

  In the drainage structure of the present embodiment described above, the drainage cylinder 10 can be connected to the drainage hole 3 of the wash bowl 1 simply by screwing the female thread portion 27 of the drainage cylinder 10 with the male thread portion 9 of the male screw cylinder 4. it can. Moreover, since the upper end part of the vertical cylinder part 25 of the drain tube 10 is arrange | positioned under the peripheral part of the drain hole 3 of the wash bowl 1, between the vertical cylinder part 25 and the peripheral part of the drain hole 3 of the wash bowl 1 Even if trash is collected, it is inconspicuous and looks good.

  Further, since both the wash bowl 1 and the drain tube 10 are made of synthetic resin, the inner peripheral surface portion of the drain hole 3 and the vertical tube portion 25 disposed below the peripheral edge portion of the drain hole 3 of the wash bowl 1 have the same texture. The appearance is improved. Moreover, even if water leaks from between the upper end surface of the vertical cylinder part 25 of the drain cylinder 10 and the peripheral part of the drain hole 3, it can be prevented from being received by the flange part 26 and dripping around.

  Moreover, in the drainage structure of this embodiment, the packing 30 is inserted | pinched between the external thread cylinder 4 and the flange part 26 arrange | positioned below this. For this reason, even if the water leaked from between the upper end surface of the vertical tube portion 25 of the drain tube 10 and the peripheral portion of the drain hole 3 flows into the flange portion 26 side, the packing 30 indicates that this water leaks to the outside. Can be prevented.

  Further, in the drainage structure of the present embodiment, the upper end surface of the vertical cylinder portion 25 is in contact with the lower surface of the peripheral edge of the drainage hole 3 of the wash bowl 1, and the inner peripheral surface of the drainage hole 3 and the inner peripheral surface of the vertical cylinder portion 25 are surfaces. It is assumed to be one. For this reason, the internal peripheral surface part of the drain hole 3 and the internal peripheral surface of the vertical cylinder part 25 are made into a continuous surface, and it becomes the further outstanding external appearance.

  In the present embodiment, the inner peripheral surface of the drain hole 3 and the inner peripheral surface of the vertical cylinder part 25 are flush with each other. However, the present invention is not limited to this, and the inner diameter of the vertical cylinder part 25 is the same as that of the drain hole 3. You may make it larger than a lower end opening diameter, and may arrange | position the vertical cylinder part 25 outside the drain hole 3. FIG. Moreover, although the inside of the drain port part 2 which protruded from the bottom part of the wash bowl 1 was used as the drain hole 3, you may form the drain hole 3 in the flat bottom part of the wash bowl 1. FIG.

DESCRIPTION OF SYMBOLS 1 Washing bowl 3 Drain hole 4 Male thread cylinder 8 Projection part 9 Male thread part 10 Drain cylinder 25 Vertical cylinder part 26 Flange part 27 Female thread part 28 Female thread cylinder part

Claims (3)

  A synthetic resin wash bowl having a drain hole formed in the bottom and a synthetic resin drain tube communicating with the drain hole of the wash bowl, and projecting downward from the periphery of the drain hole to the wash bowl. A male screw cylinder having a male screw part formed on the outer peripheral surface of the part is provided by insert molding, and the drain pipe is a vertical cylinder part and a flange formed over the outer periphery at a position below the upper end of the vertical cylinder part And a female threaded cylindrical part protruding upward from the outer peripheral edge of the flange part and having a female threaded part formed on the inner peripheral surface thereof, and the female threaded part of the drainage cylinder is screwed into the male threaded part of the male threaded cylinder A drainage structure characterized in that an upper end portion of a vertical cylinder portion of the drainage cylinder is fitted into the male screw cylinder and disposed below a peripheral edge of a drainage hole of the wash bowl.   The drainage structure according to claim 1, wherein a packing is sandwiched between the male screw cylinder and a flange portion disposed below the male screw cylinder.   The upper end surface of the vertical cylinder part is in contact with the lower surface of the peripheral edge of the drainage hole of the wash bowl, and the inner peripheral surface of the drainage hole and the inner peripheral surface of the vertical cylinder part are flush with each other. The drainage structure according to claim 1 or claim 2.

Images