JP5539636B2 - Saddle tap with saddle - Google Patents

Description

  The present invention relates to a water faucet with a saddle used when a water supply pipe is branched from a water pipe.

Generally, when a water supply branch is branched from a water pipe buried in the ground, a water faucet with a saddle is used. And there are a screw type and a flange type in the mounting structure of the saddle for fixing the water faucet with saddle and the main body of the water faucet.
As shown in FIG. 6, the screw-type saddle-equipped water faucet 1 is secured to the saddle portion 4 by screwing a male screw 3 applied to the water stop portion 2 and a female screw 5 applied to the saddle portion 4. Joining with the water part 2 is performed. Further, the gasket member 6 is accommodated in a gasket chamber 7 provided in the saddle portion 4. In the screw type saddle water faucet 1 of the same figure, the gasket member 6 is pressed by the upper surface 7a of the gasket chamber 7 to the water pipe 8 side.

  On the other hand, in the flange-type saddle-equipped water faucet, the flange portion of the water stop portion is bolted to the saddle portion with a plurality of bolts, and the saddle portion and the flange portion are joined. The gasket member is housed in a gasket chamber provided in the saddle portion, and is pressed toward the water pipe by the lower surface of the water stop portion 2.

As a specific example of the flanged water stopper with a saddle, there is a water stopper with a saddle disclosed in Patent Document 1. As shown in FIG. 7, the water faucet 11 with a saddle of the literature 1 has an annular holding body 14 between the saddle portion 12 and the water faucet body 13, and is provided on the lower side of the annular holding body 14. A gasket member 15 is accommodated in the gasket chamber 18 to be formed. The gasket member 15 is pressed against the lower surface 14 a of the annular holding body 14.
The saddle-equipped water faucet 11 can be reduced in overall height compared to the saddle-equipped water faucet of the same flange type, and the electrical contact between the metal water pipe 16 and the saddle portion 12 can be reduced. There are advantages such as prevention and prevention of corrosion.

  Further, the saddle water faucet of Patent Document 2 has an annular fastening member inside the stopper housing, and the collar portion at the lower end of the annular fastening member does not contact the lower end edge of the opening of the stopper housing. It has a structure that fits inside. The saddle packing, which is a gasket, is accommodated in an accommodation hole provided in the saddle, and the upper end surface is pressed by the lower surface of the annular fastening member and the lower surface of the plug housing.

Japanese Patent Laid-Open No. 10-306895 JP 2001-289385 A

  However, in each of the above-described saddle-equipped water faucets, if the contact surface with the water pipe spreads to the outer peripheral side along the outer shape of the water pipe, a phenomenon occurs that the seal surface pressure decreases. There was a thing. This phenomenon becomes remarkable when the water pipe has a small diameter, for example, when the water pipe has a nominal diameter of 40A, 50A, 75A or the like.

  In this case, for example, in the water faucet 11 with a saddle shown in FIG. 7, the outer surface 15a of the gasket member 15 is supported by the inner wall of the gasket chamber 18, that is, the inner wall 12c of the cylindrical portion 12b of the saddle portion 12. A structure that prevents the member 15 from spreading is also conceivable. However, the saddle portion 12 is formed of a cast iron or the like, and the inner wall 12c has a tapered surface shape having a casting gradient and has a large dimensional tolerance. Therefore, the gasket does not depend on the shape of the saddle portion 12. There has been a demand for a structure that can ensure the seal surface pressure by the member 15.

  Further, in the flange-type saddle-equipped water faucet 11 such as the water faucet 11 with a saddle in Patent Document 1 or FIG. 7, the flange portion 14b of the annular holding body 14 is thickened, and the gasket member 15 is formed by the lower surface 14a of the annular holding body 14. It is also conceivable to increase the amount of pressing the entire surface. However, in this case, there is a possibility that the gasket member 15 is deformed so as to protrude toward the inner diameter side. Therefore, the gasket member 15 is attached to a drilling machine (not shown) for providing a hole in the water pipe 16 or a hole. The anticorrosion sleeve (not shown) may interfere with the gasket member 15.

  In addition, since the saddle water faucet of the document 2 has a structure in which the upper end surface of the saddle packing is in contact with the lower surface of the annular fastening member and the lower surface of the plug housing, it is difficult to increase the pressing amount of the gasket. . Furthermore, since the saddle water faucet has a structure in which the saddle packing is pressed by the annular fastening member and the plug housing, there is a problem that the sealing performance is deteriorated.

  By the way, among the water taps with a saddle described above, in particular, a water tap with a flange type saddle, for example, a water tap 11 with a saddle in FIG. 7 is a flange formed on the water tap 11 on the upper surface 12 a of the saddle portion 12. Since the portion 17 is mounted, when the saddle is coated with anticorrosion powder coating or the like, the thickness of the coating (not shown) on the saddle portion upper surface 12a that is a contact surface with the water faucet body 13 Is added so that the water faucet body 13 is separated upward with respect to the saddle portion 12. Further, at this time, the thickness of the coating is also applied to the lower surface side of the saddle portion, and the entire water faucet is also separated upward with respect to the water pipe 16.

  For this reason, for example, when the film thickness of the coating applied to the surface of the saddle portion 12 is thicker than 300 μm which is a generally prescribed film thickness, the water faucet body 13 is separated from the water pipe 16. Since the gasket member 15 is disposed at the position, the pressing amount of the gasket member 15 is lowered, and the sealing performance between the water faucet body 13 and the water pipe 16 is deteriorated. Moreover, since the thickness of the coating is affected by temperature, humidity, the shape of the article to be painted, the coating time, the skill of the operator, etc., it is difficult to align all products with the same coating thickness, It is difficult to keep the sealing performance by the gasket member 15 constant.

  The present invention has been developed in order to solve the conventional problems. The purpose of the present invention is to dramatically improve the sealing performance of the gasket without overhanging the gasket toward the inner peripheral side. It is another object of the present invention to provide a saddle-equipped water faucet that can ensure a constant pressing amount of a gasket without being affected by the coating film thickness.

In order to achieve the above object, an invention according to claim 1 is a flange-type saddle water faucet in which a support portion provided in a saddle for fixing a distribution pipe and a flange portion provided in a water faucet body are combined. The water stop mechanism built in the water faucet body is held by a substantially cylindrical bush screwed to the lower part of the water faucet body, and an annular gasket is placed in the gasket chamber provided at the lower part of the water faucet body. The gasket is mounted to compress the gasket between the lower surface of the bush and the outer peripheral surface of the water pipe, and an annular flange is formed on the lower outer peripheral side of the bush, and the lower surface of the annular flange is directed downward. An annular pressing protrusion is formed so as to protrude, and the pressing force pressing the outer peripheral surface of the upper surface of the gasket with the pressing protrusion raises the compression rate on the outer peripheral side of the gasket so that the water distribution pipe is formed in the outer peripheral region of the bottom of the gasket. saddle with diversion plug seal site with the A.

According to the invention which concerns on Claim 1, it is a water stop cock with a saddle which can improve the sealing performance by this gasket, without a gasket projecting to an inner peripheral side. For this reason, for example, water pipes having different nominal diameters can be attached to water pipes in a state where the gaskets are pressed in an appropriate pressing state even for distribution pipes (water pipes) having different nominal diameters. However, it is possible to share one gasket. Further, without being affected by the thickness of the coating can provide a branch pipe can saddle with diversion plug which sealed anti leakage to ensure the pressing force of the gasket constant.

Moreover, the pressing projections firmly in contact with the gasket upper surface outer peripheral side as possible the sealing property between the pressing projection and the gasket out is further improved.

In addition , the water faucet with a saddle can prevent electrical continuity between the water faucet body and the saddle, thereby preventing the occurrence of corrosion of different metals. Further, high strength against external force such as an earthquake, Ru can also convert the mounting direction of the diversion plug body against the saddle.

Furthermore, while exerting a uniform pressure to improve the sealing property by the annular protrusion, cut with ensuring high sealing property than by pressing the gasket top outer peripheral side by the bush member.

In addition , the height of the water faucet body is improved by the structure in which the gasket can be pressed directly on the exposed part of the body or the bush can be provided thinly while providing a uniform pressing force by the annular protrusion and improving the sealing performance. It is a water faucet with a saddle that can be made compact by keeping the height low.

Hereinafter, a preferred embodiment of a water faucet with a saddle according to the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 and 2, the saddle-equipped water faucet of the present invention is used to branch the water distribution pipe 20 and includes a saddle 21 for fixing the water distribution pipe 20 and a water faucet body 22. . A gasket chamber 23 is provided on the lower surface side of the water faucet body 22, and an annular gasket 24 is mounted in the gasket chamber 23. The gasket chamber 23 is formed in a region surrounded by the cylindrical portion 21 b of the saddle 21, the lower surface of the water faucet body 22, and the water distribution pipe 20. The gasket 24 is pressed between at least the lower surface of the water faucet body 22 and the water distribution pipe 20.

  The water faucet body 22 has a body 25, and a water stop mechanism 26 is built in the body 25. A bush 27 is provided below the water stop mechanism 26, and the water stop mechanism 26 is held in the body by the bush 27.

  The bush 27 is formed in a substantially cylindrical shape, and an annular flange 28 is formed on the lower side thereof. On the outer peripheral side of the lower surface 29 of the annular flange 28, a pressing protrusion 30, which is an annular protrusion, is formed in an annular shape, and the pressing protrusion 30 contacts the upper surface 31 of the gasket 24 and the outer periphery of the gasket 24. The compression rate on the side is increased. Here, the outer peripheral side of the gasket 24 is formed at least in a region on the outer peripheral side of the bottom inner peripheral edge 24a of the gasket 24, which is a seal portion with the water distribution pipe 20, more preferably in the inner periphery of the gasket 24. An area on the outer peripheral side with respect to the recess 24b. The recess 24b prevents the pressed gasket 24 from being pushed inward.

  Further, the stepped portion of the pressing protrusion 30 is provided with a taper 32 of approximately 45 °, and the pressing protrusion 30 is connected to the lower surface 29 other than the pressing protrusion 30 via the taper 32. An edge portion 32 a is formed between the taper 32 and the annular protrusion 28.

  For example, the pressing protrusion 30 is formed in an annular shape on the bush 27 with a thickness of about 1 mm. However, the pressing protrusion 30 may be a part near the position perpendicular to the pipe axis 20a of the water distribution pipe 20. It may be other than annular. Further, the pressing protrusion 30 may be formed on the outer peripheral side of the lower surface 29 of the bush 27 and may be other than the outermost peripheral side of the lower surface 29.

  Further, a parallel two-surface portion (not shown) is formed on the outer peripheral side of the annular flange portion 28 of the bush 27. By gripping and tightening the parallel two-surface portion with a tightening tool such as a chuck (not shown), the body 25 is fixed. The bush 27 can be attached and detached.

A flange-like portion 33 is formed so as to protrude on the inner peripheral side of the lower surface 29 of the bush 27, and a recess 34 is provided outside the flange-like portion 33. A part of the gasket 24 can be sandwiched in the recess 34. Further, a cylindrical insulator 35 is mounted on the inner peripheral side of the bush 27, and a surrounding portion 36 is formed on the lower side of the cylindrical insulator 35. The surrounding portion 36 can surround the bowl-shaped portion 33. By this surrounding, the bush 27 made of a metal material can be insulated from the tap water by the cylindrical insulator 35, and discharge from the bowl-shaped portion 33 is prevented.
Further, a concave annular mounting portion 37 is formed on the upper inner peripheral surface side of the bush 27, a male screw 38 is formed on the upper outer peripheral side, and a mounting concave portion 39 is formed in a lower portion of the male screw.

  The gasket 24 has an inner peripheral flange 40 formed on the side of the bush 27 attached to the flange 33. The upper surface 31 of the gasket 24 is provided in a substantially flat shape, and the pressing protrusion 30 can press the outer peripheral side of the upper surface 31 as described above.

  The body 25 has a flange portion 41 on the lower side, and the water faucet body 22 is a flange-type water faucet that couples the flange 41 and the support portion 21 a provided on the saddle 21. . Further, a mounting cylinder part 43 is formed below the flange part 41, and a vertical opening 44 is formed inside the mounting cylinder part 43. Further, an opening 45 for attaching / detaching a drilling machine or a corrosion protection sleeve insertion machine (not shown) is formed above the vertical opening 44, and the water distribution pipe 20 can be drilled through the opening 45. . A male screw portion 46 is provided on the outer peripheral side of the opening 45, and a female screw portion 51 of the cap 50 can be screwed to the male screw portion 46.

  A female screw 52 is formed above the vertical opening 44. Furthermore, a branch channel 53 is provided in a direction orthogonal to the vertical opening 44, and the channel can be branched by the branch channel 53 after the water distribution pipe 20 is branched. A stem insertion hole 54 is formed coaxially with the branch flow path 53 at a position facing the branch flow path 53. A concave annular mounting portion 55 is formed at a position below the opening 45.

The water stop mechanism 26 of the body 25 includes a ball 60, a stem 61, an upper ball sheet 62, and a lower ball sheet 63.
The ball 60 has a three-way opening 64 therein and is mounted in the body 25 through a stem 61. The ball 60 is provided so that the flow path of the three-way port 64 can be switched by being rotated by a stem 61. The stem 61 has a ball 60 attached to the distal end side in a state of being inserted into the stem insertion hole 54.

  When assembling the water faucet body 22, the ball 60 is stored at the intersection of the vertical opening 44 and the branch flow path 53 with the upper ball seat 62 mounted on the annular mounting portion 55. Install the stem 61. Subsequently, the lower ball seat 63 is mounted on the annular mounting portion 37 of the bush 27, the O-ring 65 is mounted on the mounting recess 39, and the bush 27 is attached to the body 25 by screwing the male screw 38 with the female screw 52. Thereby, the water stop mechanism 26 is comprised inside the body 25.

  Further, after the bush 27 is attached, the end surface side of the mounting cylinder portion 43 comes into contact with the upper surface side of the annular flange portion 28. With this mounting structure, the bush 27 is mounted between the body 25 and the gasket 24. A cap 50 is attached to the opening 45 by screwing the male screw portion 46 and the female screw portion 51.

  The gasket 24 is mounted so as to sandwich the inner peripheral flange portion 40 from above the cylindrical insulator 35 into the recess portion 34 and temporarily attached to the flange portion 33. Thereby, the gasket 24 is prevented from falling off the bush 27.

  The assembled water faucet body 22 is assembled with the water distribution pipe 20 via a saddle 21, a band 70 for fixing to the lower side of the water distribution pipe 20, and bolts and nuts 71 for fixing the saddle 21 and the band 70. It is attached to. In this case, the water faucet body 22 is placed on the support portion 21a of the saddle 21 via the flange portion 41, and is fastened and fixed to the saddle 21 by a bolt (not shown) in this state. Next, the saddle 21 and the band 70 are fixed by tightening the bolts and nuts 71 with the water distribution pipe 20 sandwiched between the saddle 21 and the band 70.

Then, the effect | action in the said embodiment of the water tap with a saddle of this invention is demonstrated.
As shown in FIG. 1, when the water faucet body 22 is attached to the water distribution pipe 20 using a saddle 21, a band 70, and a bolt / nut 71, the gasket 24 mounted in the gasket chamber 23 is connected to the water distribution pipe. 20 and the bush 27. At this time, since the pressing protrusion 30 that presses the upper surface 31 of the gasket 24 is provided on the outer peripheral side of the lower surface 29 of the bush 27, the pressing protrusion 30 when the bolt / nut 71 is tightened as shown in FIG. Presses the outer peripheral side of the upper surface 31.

The action of the force at this time will be described with reference to FIGS. 2 and 3. When the pressing protrusion 30 presses the outer peripheral side of the upper surface 31, the force A acts on the region of the force point A _1. It is a point of contact with the pipe top 20c of the water pipe 20 and tries to work around a fulcrum B which is a part that presses the gasket 24 most strongly. As a result, a force C is applied to the point of action C ₁ , which is the contact position between the bottom of the gasket 24 and the water distribution pipe 20, in the orthogonal direction Y of the arrow perpendicular to the pipe axis direction X of the pipe axis 20 a shown by the arrow in FIG. work. In FIG. 2, the fulcrum B in the gasket 24 before deformation is shown, and the portion indicated by the two-dot chain line of the gasket 24 actually contacts the water distribution pipe 20 and is deformed.

In this case, by providing the pressing protrusion 30, the pressing force by the force A is applied from the pressing protrusion 30 to the gasket 24 in a concentrated manner, and the compression rate on the outer peripheral side of the upper surface 31 is improved. In addition, by pressing protrusion 30 since they are formed on the upper surface 31 outer peripheral side, Te to ensure a long distance between the force point A ₁ and the fulcrum B in this action, the moment of force C on the action point C ₁ Can be bigger. As a result, a force C is applied in a direction in which the force A tends to tilt the gasket 24 from the outer peripheral side to the inner peripheral side with the fulcrum B as the center, and the gasket 24 is prevented from spreading to the outer peripheral side. It closely adheres along the outer peripheral surface 20b. By these operations, the gasket 24 comes into close contact with the water distribution pipe 20 and the sealing performance is improved.

  Further, the stepped portion of the pressing protrusion 30 is a taper 32, and an edge 32a is formed between the taper 32 and the annular protrusion, so that the edge 32a is firmly in contact with the gasket 24. The sealability can be further improved by abutting against. In addition, since the stepped portion is the taper 32 formed in a tapered shape toward the edge portion 32a, the compression rate of the gasket 24 can be gradually increased, and the occurrence of cracks in the contacted portion with the gasket 24 is prevented. be able to.

From the above, even when the water faucet body 22 is attached to the water distribution pipe 20 having a different nominal diameter, the gasket 24 is excellently deformed along the shape of the outer peripheral surface 20b of the water distribution pipe 20. High sealing performance can be exhibited. Therefore, the same gasket 24 can be used for the distribution pipes 20 having different nominal diameters, and the gasket 24 can be shared. At this time, in particular, when the water distribution pipe 20 has a small diameter, the movement of the gasket 24 trying to spread to the outer peripheral side due to the internal pressure is more effectively suppressed.
In addition, the gasket 24 is not pushed out to the inner peripheral side as the compression rate increases, and there is no possibility that the punch or the anticorrosion sleeve interferes with the gasket 24.

  Further, the flange-type water faucet body 22 of the present embodiment eliminates a decrease in the pressing amount of the gasket due to the saddle coating thickness, which is a flange-type defect. That is, in FIG. 2, when the saddle 21 is painted, the water faucet body 22 is disposed at a position away from the water distribution pipe 20, but as in the case described above, the pressing protrusion of the bush 27. When 30 presses the outer peripheral side of the upper surface 31 of the gasket 24, the pressing amount of the gasket 24 is ensured and high sealing performance is exhibited.

  Note that, on the inner peripheral side of the gasket 24, the inner peripheral flange portion 40 is attached so as to be sandwiched between the cylindrical insulator 35 and the concave portion 34, so that the distal end side of the bush 27 is the top portion of the water distribution pipe 20. It is possible to prevent a jumping current from being generated due to a contact between the upper surface of the cylindrical insulator 35 and a gap formed on the upper side of the cylindrical insulator 35.

  Further, since the pressing protrusion 30 is provided, the thickness of the parallel two-surface portion provided on the outer peripheral side of the annular flange portion 28 of the bush 27 is increased, so that it is easy to tighten with a tightening tool. In the process, the width of the two surfaces is less likely to be worn when tightening with a chuck or the like, and the assemblability is improved.

  In the above description, the pressing protrusion 30 is provided on the outer peripheral side of the lower surface 29 of the annular flange 28 of the bush 27. However, the annular protrusion 28 may be omitted. At this time, in FIG. 2, the mounting cylinder 43 is extended to the position indicated by the broken line. As a result, the exposed portion 72 of the body 25 that is the end surface side of the mounting cylinder portion 43 is exposed on the upper surface of the gasket chamber 23 of the water faucet body 22. A pressing protrusion (annular protrusion) is constituted by the lower surface 29 of the bush 27 holding the water stop mechanism 26 built in the stopper main body 22, and the compression ratio on the gasket outer peripheral side can be improved by the pressing protrusion.

  Further, FIG. 4 shows another example of the bush. In the above-described bush 27, the pressing protrusion 30 is provided on the outermost peripheral side. However, the bush 75 in the figure increases the thickness of a part of the outer peripheral side without forming a protrusion on the outermost peripheral side. Thus, a pressing protrusion is formed. In this case, as shown in FIG. 4A, the pressing projection 76 is formed to project in a circular arc shape, or as shown in FIG. 4B, the pressing projection 77 has a substantially trapezoidal cross section. It is desirable to form it. In particular, when the pressing protrusion 77 is formed in the state of FIG. 4B, a taper 78 is formed in the same manner as described above, and the taper 78 further improves the sealing performance.

  Further, FIG. 5 shows still another example of the bush. As shown in the figure, the pressing protrusion 81 of the bush 80 is formed on a part of the contact side with the gasket 24, and the pressing protrusion 81 is arranged by the gasket 24 in the radial direction of the bush 27. It is formed only near the position where the pressing force to the water pipe 20 is increased. In this case, the gasket 24 can be further deformed along the outer peripheral surface 20 b of the water distribution pipe 20.

It is the longitudinal cross-sectional view which showed one Embodiment of the water tap with a saddle of this invention. It is a partially expanded sectional view of FIG. It is the schematic diagram which showed the mounting state of the gasket. It is a longitudinal cross-sectional view which shows the other examples of a bush. It is a partially omitted bottom view showing still another example of the bush. It is the longitudinal cross-sectional view which showed the water tap with the conventional screw type saddle. It is the longitudinal cross-sectional view which showed the water tap with the conventional flange type saddle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 Water pipe 21 Saddle 21a Bearing part 22 Water faucet body 23 Gasket chamber 24 Gasket 26 Water stop mechanism 27 Bush 29 Lower surface 30 Annular protrusion (pressing protrusion)
31 Upper surface 32 Taper 41 Flange part 72 Exposed part

Claims (1)

A flange-type saddle water faucet that combines a support provided on a saddle for fixing a distribution pipe and a flange provided on a water faucet body, and a water stop mechanism built into the water faucet body is divided. It is held by a substantially cylindrical bush screwed to the lower part of the faucet body, and an annular gasket is mounted in the gasket chamber provided at the lower part of the water faucet body so that the gap between the lower surface of the bush and the outer peripheral surface of the water distribution pipe The gasket is crushed and an annular flange is formed on the lower outer peripheral side of the bush, and an annular pressing protrusion is formed on the lower surface of the annular flange so as to project downward. in the pressing force for pressing the upper surface outer periphery of the gasket, saddle with diversion plug, characterized in raising the outer peripheral side compression ratio of the gasket at the bottom peripheral region of the gasket that has the seal portion of the water pipe .

Images