JP2010276048A - Waterproof structure of faucet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain reduction in watertightness by sufficiently restraining the deterioration with time of packing, by securing sufficient watertightness, by easily restraining outside protrusion of the packing caused by excessive fastening, when installing a faucet such as a water supply device arranged outdoors. <P>SOLUTION: A washer 14 has a ring-shaped washer body 15 and a short size cylindrical first guide piece 16 projecting to the first packing side from the outer peripheral edge of the washer body by a compressive thickness of the first packing 12 required for imparting the watertightness. The side peripheral end of a first guide piece abuts on an installation side part in response to fastening of a nut 9, and the first packing is compressed in a first area surrounded by the first guide piece, the washer body and the installation side part, and the required watertightness is imparted. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a water stop structure for suppressing water leakage at a faucet such as a water supply device installed outdoors.

  Rainwater drained from rain gutters is used for watering plants, garden trees, etc. and for car washing. Such use of rainwater enables water saving and contributes to environmental protection.

  The present applicant has provided a rainwater utilization system 41 as shown in FIG. 4, for example.

  In the rainwater utilization system 41, a rainwater extraction device 43 is connected in the middle of the drainage channel formed by the ridge 42, and a rainwater storage tank 46 is connected to a rainwater extraction portion 44 having a built-in filter and the like via a water supply hose 45. Is connected. A part of the rainwater flowing through the eaves 42 is taken out from the rainwater take-out section 44 of the rainwater take-out device 43 and stored in a rainwater storage tank 46 through a water supply hose 45. The stored rainwater can be taken out by opening the faucet 47 provided in the lower part of the rainwater storage tank 46, and used for watering, car washing, and the like. In addition, one end of an overflow hose 48 is connected to the upper end of the rainwater storage tank 46, and when rainwater exceeding the capacity of the rainwater storage tank 46 is supplied to the rainwater storage tank 46, excess rainwater is It is discharged toward the ground through the overflow hose 48.

  As shown in FIG. 5, the faucet 47 includes a faucet body 49 and a connection joint 50 extending substantially vertically from the upper portion of the faucet body 49 to the rear. In the middle, a circular ring-shaped flange 51 protruding outward is provided. Further, in the connection joint 50, a screw is cut on the outer periphery from the rear side to the tip of the flange 51, and a screw part 52 is provided. Such a faucet 47 is formed by inserting a connection joint 50 into the through hole 54 formed in the lower front portion of the housing portion 53 of the rainwater storage tank 46 from the tip of the threaded portion 52 and inserting a nut 55 into the threaded portion 52. It is attached to the rainwater storage tank 46 by screwing from the tip and sandwiching the housing portion 53 between the flange 51 and the nut 55. Further, in order to prevent water leakage from the through-hole 54, a circular ring-shaped packing 56 is interposed between the flange 51 and the housing portion 53. By tightening the nut 55, the packing 56 is compressed and deformed to ensure water tightness.

  However, in the water stop structure of the faucet 47 by the packing 56, if the nut 55 is tightened excessively, the packing 56 protrudes to the outside of the flange 51 due to compressive deformation, and the water tightness is greatly reduced. Such a decrease in the watertightness due to the protrusion of the packing 56 is damaged by the common sense that the nut 55 needs to be sufficiently tightened in order to improve the watertightness. Although it is recommended that the nut 55 be tightened moderately, it is not clear how much is appropriate, and it is necessary to rely on human senses.

  On the other hand, the following Patent Document 1 discloses a technique for improving the sealing performance by a seal ring interposed between members coupled by screwing or the like, and the disclosed technique includes the faucet 47 formed by the packing 56. It is made for the problem common to the problem of deterioration of watertightness in the still water structure.

  That is, in Patent Document 1 below, a seal ring body made of an elastic material and a plurality of seal ring bodies embedded in the circumferential direction of the seal ring body and projecting toward both sides of the seal ring body. There is disclosed a seal ring composed of detent means having a plurality of biting pieces. This seal ring achieves rotation prevention by the engagement piece engaging with the flange portion and the panel on the housing side. In this state, the seal ring main body is appropriately compressed and deformed, and the desired sealability and airtightness are appropriately achieved. It is to get surely.

Japanese Utility Model Publication No. 5-1068

  The seal ring described in Patent Document 1 can be incorporated into the water stop structure of the faucet 47 shown in FIG. 5, eliminates excessive tightening of the nut 55, and achieves sufficient water tightness by appropriate compression deformation of the seal ring body. Is expected to be realized.

  However, the seal ring described in Patent Document 1 is a seal ring body made of an elastic material with a detent means embedded therein, which is expected to increase the cost of the seal ring, and the rainwater storage tank shown in FIG. It is feared that it will be reflected in the price of 46.

  In addition to the above economic problems, since the rainwater storage tank 46 is installed outdoors, the seal ring body formed of an elastic material has an environment such as direct sunlight, rainfall, and difference in temperature. There is a concern that it will change, deteriorate over time, and water tightness will gradually decrease. It is considered that the anti-rotation means does not function to suppress the deterioration of such a seal ring body over time.

  The present invention has been made in view of the circumstances as described above, and easily suppresses the protrusion of the packing to the outside due to excessive tightening, ensures sufficient water tightness, and deterioration of the packing over time. It is an object of the present invention to provide a water stop structure for a faucet that can sufficiently suppress the deterioration of water tightness.

  The present invention has the following features in order to solve the above problems.

  In the first invention, a ring-shaped flange projecting outward is provided in the middle of the length direction of the connection joint extending rearward from the faucet body, and a thread portion is provided on the outer periphery of the connection joint from the flange to the tip. The provided faucet is inserted from the distal end side of the connection joint into a through hole drilled in the attachment side portion where the faucet is attached, and a nut is screwed in from the distal end side of the connection joint to attach the faucet, and the flange and A faucet water-stopping structure in which a washer is interposed between the attachment side portion and the first packing is interposed between the washer and the attachment side portion. The washer is a ring-shaped washer body. And a first guide piece having a short cylindrical shape protruding from the outer peripheral edge of the washer body to the first packing side by the compressed thickness of the first packing required for providing water tightness, With tightening The first circumferential end of the first guide piece abuts against the attachment side portion, and the first packing is compressed in the first region surrounded by the first guide piece, the washer body, and the attachment side portion. It is characterized by being given watertightness.

  According to a second aspect of the present invention, in the feature of the first aspect of the invention, the washer also includes a short cylindrical second guide piece that protrudes from the outer peripheral edge of the washer body toward the second packing side. Protrudes by the compression thickness of the second packing required for ensuring watertightness, and the second guide piece is disposed outside the flange as the nut is tightened, and at least partially overlaps the flange. The second packing is compressed in the second region surrounded by the second guide piece, the washer main body and the flange, and the required water tightness is ensured.

  According to the first aspect of the invention, the washer protrudes from the outer periphery of the washer main body to the first packing side by the compression thickness of the first packing necessary for providing the ring-shaped washer main body and water tightness. And a short cylindrical first guide piece. As the nut is tightened, the side end of the first guide piece comes into contact with the attachment side portion, and the first packing is within the first region surrounded by the first guide piece, the washer body, and the attachment side portion. Is compressed to provide the required water tightness.

  The movement of the first packing that is about to bulge outward with compression is restricted by the first guide piece and does not protrude outside the first region. Further, since the side peripheral end of the first guide piece is in contact with the portion on the mounting side, the nut cannot be further tightened. Therefore, excessive tightening of the nut is eliminated, and the first packing is compressed by an amount suitable for imparting water tightness, does not protrude outside the flange, and does not deteriorate water tightness.

  In addition, the tightening of the nut for that purpose does not depend on the human sense and is impossible to tighten, so that it can be reliably and easily performed with a certain accuracy without requiring skill. Further, the provision of such watertightness is realized by a washer provided with the first guide piece, and the cost increase is sufficiently suppressed. Price rises of water supply devices installed outdoors such as rainwater storage tanks can be suppressed.

  The first packing is hardly subjected to environmental changes such as direct sunlight, rainfall, and difference in temperature, and deterioration over time is sufficiently suppressed, and a decrease in water tightness is suppressed.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the washer also includes the short cylindrical second guide piece that protrudes from the outer peripheral edge of the washer body to the second packing side, The second guide piece protrudes by the compressed thickness of the second packing that is necessary for ensuring watertightness. As the nut is tightened, the second guide piece is disposed outside the flange, overlaps at least partially with the flange, and is second within the second region surrounded by the second guide piece, the washer body, and the flange. The packing is compressed and the required water tightness is ensured.

  The movement of the second packing, which tends to bulge outward with compression, is restricted by the second guide piece, and the second packing does not protrude beyond the second region. The second packing is compressed by an amount suitable for securing the water tightness, does not protrude outside the flange, and does not deteriorate the water tightness. Such securing of water tightness is realized by a washer provided with the second guide piece together with the first guide piece, and the cost increase is sufficiently suppressed. Price rises of water supply devices installed outdoors such as rainwater storage tanks can be suppressed.

  The second packing is also hardly subject to environmental changes such as direct sunlight, rainfall, and difference in temperature, and the deterioration over time is sufficiently suppressed, and the decrease in water tightness is suppressed.

It is the disassembled perspective view which showed one Embodiment of the water stop structure of the faucet of this invention. It is sectional drawing of the water stop structure of the faucet shown in FIG. <a> <b> is an enlarged cross-sectional view showing the water stop structure of the faucet shown in FIG. 2, <a> shows a state before fastening the nut, and <b> The state after the nut is fastened is shown. 1 is a perspective view illustrating a rainwater utilization system provided by the present applicant. It is principal part sectional drawing which showed the water stop structure of the faucet attached to the rainwater storage tank shown in FIG.

  As described above, FIG. 1 is an exploded perspective view showing an embodiment of the faucet water stop structure of the present invention, and FIG. 2 is a cross-sectional view of the faucet water stop structure shown in FIG.

  The water stop structure of the faucet of this embodiment is illustrated as being applied to the faucet 47 of the rainwater storage tank 46 used in the rainwater utilization system 41 shown in FIG.

  The faucet 1 includes a faucet body 2 and a connection joint 3 extending substantially vertically from the upper portion of the faucet body 2 to the rear. The faucet body 2 is provided with a lever 4 (not shown in FIG. 2) that is rotatable at the top in a horizontal plane, and the faucet 1 is opened and closed by the rotation of the lever 4. When the faucet 1 is opened by the turning operation of the lever 4, the rainwater stored in the rainwater storage tank 46 is discharged from the discharge port 5 at the lower end of the faucet body 2, and when the faucet 1 is closed, Rainwater discharge is stopped.

  The connection joint 3 is tubular and communicates with the faucet body 2. Therefore, the rainwater stored in the rainwater storage tank 46 flows out to the faucet body 2 through the water passage 6 formed inside the connection joint 3.

  In the connection joint 3, a circular ring-shaped flange 7 that protrudes outward is provided at a slightly distal end portion in the middle of the length direction. Further, a thread is provided on the outer periphery of the connection joint 3 from the flange 7 to the tip, and a threaded portion 8 is provided.

  Such a faucet 1 is made of resin for both the faucet body 2 and the connection joint 3, and is attached to the casing portion 53 of the rainwater storage tank 46 by the nut 9.

  A through-hole 10 is formed in the lower part of the front surface of the housing part 53 of the rainwater storage tank 46, which is a part on the attachment side to which the faucet 1 is attached. In addition, a circular ring-shaped receiving portion 11 protrudes toward the front of the housing portion 53 at the periphery of the through-hole 10, and the receiving portion 11 is higher in the housing portion 53.

  The faucet 1 is inserted into the through hole 10 from the tip of the connecting joint 3 on the threaded portion 8 side and attached to the rainwater storage tank 46. A portion on the distal end side of the connection joint 3 inserted into the through hole 10 protrudes inside the rainwater storage tank 46. Then, the nut 9 is screwed into the threaded portion 8 of the connection joint 3 protruding to the inside of the rainwater storage tank 46 from the tip side, and the faucet 1 is attached to the rainwater storage tank 46.

  In attaching the faucet 1, in this embodiment, a first packing 12, a second packing 13, and a washer 14 are interposed between the flange 7 and the receiving portion 11. The first packing 12 and the second packing 13 are both flat packings made of synthetic resin, rubber, etc. and having elasticity, and are formed in a circular ring shape. The inner diameter is slightly larger than the outer diameter of the threaded portion 8 of the connection joint 3, and the threaded portion 8 can be passed inside the first packing 12 and the second packing 13. The second packing 13 is disposed outside the outer periphery of the screw portion 8. Each of the first packing 12 and the second packing 13 can be compressed and deformed in the thickness direction. The first packing 12 is interposed between the washer 14 and the receiving portion 11, and the second packing 13 is interposed between the flange 7 and the washer 14. The receiving part 11 has a flat front surface with improved adhesion to the first packing 12, and its area is larger than the area of the first packing 12 on the receiving part 11 side. It is possible to make sufficient contact with the packing 12.

  The washer 14 includes a circular ring-shaped washer main body 15, a first guide piece 16 protruding rearward on the first packing 12 side from the outer peripheral edge of the washer main body 15, and an outer peripheral edge of the washer main body 15. And a second guide piece 17 projecting forward on the second packing 13 side. Both the first guide piece 16 and the second guide piece 17 have a short cylindrical shape. Such first guide piece 16 and second guide piece 17 can be formed integrally or separately, and can also be formed integrally or separately on the washer body 15. When formed as a separate body, they can be bonded to each other using an adhesive or the like. In this embodiment, the washer 14 is formed as an integrally molded product. The washer 14 can be formed from an appropriate material such as metal or synthetic resin, and the material can be changed between the washer body 15, the first guide piece 16, and the second guide piece 17. The washer 14 can pass the threaded portion 8 of the connection joint 3 inside thereof, and is disposed on the outer periphery of the threaded portion 8.

  3 <a> <b> are enlarged cross-sectional views showing the water stop structure of the faucet shown in FIG. 2, <a> shows the state before the nut 9 is fastened, and <b> > Indicates a state after the nut 9 is fastened.

As shown in FIG. 3 <a>, the protruding margin of the first guide piece 16 prevents the water leakage from the through hole 10 and the compression thickness of the first packing 12 required to provide water tightness. Minutes, that is, (w ₁ −Δw ₁ ). Here, w ₁ indicates the thickness of the first packing 12 before compression corresponding to before the nut 9 is fastened, and Δw ₁ indicates the thickness compressed by fastening the nut 9. That is, (w ₁ −Δw ₁ ) is the thickness of the compressed first packing 12 and is the thickness required for imparting watertightness. “Providing watertightness” means that the first packing 12 is interposed to prevent water leakage from the through hole 10 and at least provide the minimum necessary watertightness.

The protrusion margin of the _second guide piece 17 is set to the compression thickness of the second packing 13 required for ensuring watertightness, that is, (w ₂ −Δw ₂ ). Here, “ensuring water-tightness” means that the water-tightness is enhanced to the extent that water leakage from the through hole 10 hardly occurs due to the second packing 13 interposed. w ₂ represents the thickness of the second packing 13 before compression corresponding to the fastening of the nut 9, and Δw ₂ represents the thickness compressed by fastening of the nut 9. That is, (w ₂ −Δw ₂ ) is the thickness of the compressed second packing 13 and is a thickness required for ensuring water tightness.

  From this, in the water stop structure of the faucet of the present invention, the washer 14 and the first packing 12 provided with the first guide piece 16 are received on the attachment side portion to which the flange 7 and the faucet 1 are attached, in this embodiment. If it is interposed between the parts 11, the provision of watertightness is realized. The arrangement of the second guide piece 17 and the second packing 13 is appropriately selected according to the required water tightness.

  As shown in FIG. 3 <b>, as the nut 9 is tightened, the side peripheral end of the first guide piece 16 comes into contact with the receiving portion 11. At this time, the first packing 12 is compressed in the first region 18 surrounded by the first guide piece 16, the washer body 15, and the receiving portion 11, and necessary water tightness is imparted. In addition, the movement of the first packing 12 that is about to bulge outward with compression is restricted by the first guide piece 16 and does not protrude outside the first region 18. The second guide piece 17 is disposed outside the flange 7 and at least partially overlaps the flange 7. For this reason, the 2nd packing 13 is compressed within the 2nd field 19 surrounded by the 2nd guide piece 17, the washer main body 15, and the flange 7, and the required watertightness is secured. Although the second packing 13 also tends to bulge outward with compression, the movement of the second packing 13 is restricted by the second guide piece 17. Accordingly, the second packing 13 does not protrude outside the second region 19.

  In this state, since the side peripheral end of the first guide piece 16 is in contact with the receiving portion 11, the nut 9 cannot be further tightened.

  As described above, in the first embodiment, excessive tightening of the nut 9 is eliminated, and the first packing 12 and the second packing 13 are respectively suitable for imparting water tightness and ensuring water tightness. Compressed and does not protrude to the outside of the flange 7, and is applied and secured without causing a decrease in watertightness. Moreover, the tightening of the nut 9 for that purpose does not depend on human senses, and the side peripheral end of the first packing 12 abuts on the receiving portion 11 and becomes impossible to tighten, so that it is possible to securely tighten without requiring skill. And it can be easily performed with a certain accuracy. Further, the provision and securing of such watertightness is realized by the washer 14 provided with the first guide piece 16 and the second guide piece 17, and the cost increase is sufficiently suppressed. It is possible to suppress an increase in the price of a water supply device installed outdoors such as the rainwater storage tank 46.

  And since the 1st packing 12 is stored in the 1st area | region 18 and the 2nd packing 13 is stored in the 2nd area | region 19, the rainwater storage tank 46 may be installed outdoors. Both the first packing 12 and the second packing 13 are hardly subjected to environmental changes such as direct sunlight, rainfall, and differences in temperature. The deterioration over time of the first packing 12 and the second packing 13 is sufficiently suppressed, and a decrease in water tightness is suppressed.

  The faucet water stop structure of the present invention is not only effective for the faucet 47 of the rainwater storage tank 46 in the rainwater utilization system 41 shown in FIG. 4, but various water supply devices installed outdoors. It can be widely applied to faucets such as. Further, the configuration and structure of the faucet is not particularly limited, as long as the faucet body can be attached to the attachment side portion of the water supply device or the like with a connection joint, Applicable and effective enough.

DESCRIPTION OF SYMBOLS 1 Faucet 2 Faucet main body 3 Connection joint 7 Flange 8 Thread part 9 Nut 10 Through-hole 12 1st packing 13 2nd packing 14 Washer 15 Washer main body 16 1st guide piece 17 2nd guide piece 18 1st area | region 19 Second area

Claims (2)

In the middle of the length direction of the connection joint extending backward from the faucet body, a ring-shaped flange protruding outward is provided, and a faucet provided with a thread on the outer periphery of the connection joint from the flange to the tip, Inserted into the through hole drilled in the attachment side where the faucet is attached from the distal end of the connection joint, and the nut is screwed in from the distal end side of the connection joint to attach the faucet, and between the flange and the attachment side part. And a faucet water-stopping structure in which a first packing is interposed between the washer and the attachment side portion,
The washer includes a ring-shaped washer main body and a short cylindrical first protruding from the outer peripheral edge of the washer main body to the first packing side by the compressed thickness of the first packing required for providing water tightness. With a guide piece,
As the nut is tightened, the side end of the first guide piece comes into contact with the attachment side portion, and the first packing is within the first region surrounded by the first guide piece, the washer body, and the attachment side portion. The faucet water-stopping structure is characterized in that the required water-tightness is imparted by being compressed. The washer also includes a short cylindrical second guide piece that protrudes from the outer peripheral edge of the washer body to the second packing side. The second guide piece is a second guide piece that is necessary for ensuring watertightness. Protrudes by the compressed thickness of the packing,
As the nut is tightened, the second guide piece is disposed outside the flange, overlaps at least partially with the flange, and is second within the second region surrounded by the second guide piece, the washer body, and the flange. The faucet water-stopping structure according to claim 1, wherein the packing is compressed to ensure the required water tightness.

Images