JP2003214585A - Saddle snap tap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a saddle snap tap which prevents not only spark erosion between a saddle and a snap tap body, but also spark erosion between a bolt and the saddle. <P>SOLUTION: This saddle snap tap fastens and fixes the saddle 1 and a band with a distributing water pipe in between. The saddle 1 and the snap tap body 30 are composed of a different kind of metal. An insulating sheet 70 is arranged between a flange part 31 of the snap tap body and an installing seat 10 of the saddle 1 opposed to this flange part. An insulating member 80 is interposed between the saddle 1 and the bolt 40 or a nut 41 composed of a different kind of metal. The flange part of the snap tap body and the installing seat of the saddle are fastened and fixed. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a saddle water faucet.

[0002]

2. Description of the Related Art Conventionally, saddle diversion taps have been used as diversion taps for branching water pipes from underground water pipes to households. As shown in FIG. 1, the saddle water tap A includes a semi-circular saddle 1 and a band 2 along the outer circumference of a water pipe (not shown), and the saddle 2 is provided with a pipe wall of the water pipe. The water faucet 3 for connecting the water intake hole and the water supply pipe (not shown) is fixed, and the saddle 1 and the band 2 are fastened with the bolt 45 and the nut 46 with the water distribution pipe in between. The structure for fixing the water faucet 3 and the saddle 1 is based on
No. 0 flange portion 31 and the mounting seat 10 of the saddle 1 face each other, and the mounting bolt 100 is screwed into the screw hole 101 provided in the mounting seat 10 through the bolt insertion hole 32 of the flange portion 31 to form the water distributor 3 Is fixed to the saddle 1.

[0003]

By the way, the saddle 1 and the band 2 are generally made of cast iron, and the water faucet body 30 is made of copper alloy or stainless steel. The mounting bolt 100 is often made of stainless steel. In this way, the saddle 1 and the water faucet body 30, the saddle 1 and the mounting bolt 1
Since 00 and 00 are mutually different metals, galvanic corrosion (electrolytic corrosion) occurs due to the contact of the different metals. Galvanic corrosion is a phenomenon in which when dissimilar metals are in contact with each other in soil or water, a battery is formed between them and the metal side having a base potential is corroded. For example, when the saddle 1 made of cast iron and the water faucet body 30 made of copper alloy come into contact with each other, the saddle 1 side is corroded.

In order to prevent the corrosion due to the contact of such dissimilar metals, an insulating material may be interposed between the contact surfaces of the saddle 1 and the water faucet body 30 so that they do not come into direct contact with each other. On the other hand, since the mounting bolt 100 for fixing the water faucet body 30 to the saddle 1 and the saddle 1 provided with the screw hole 101 for screwing the bolt are different metals, the threaded portion thereof is also corroded. Occurs. But bolt 1
00 and the screw hole 101, no insulating material can be interposed, so that the corrosion of the screw portion cannot be prevented. In particular, since the threaded portion has a large contact area, corrosion may progress rapidly.

Therefore, an object of the present invention is to provide a saddle water faucet capable of preventing not only electrolytic corrosion between the saddle and the water faucet body but also electrolytic corrosion between the bolt and the saddle.

[0006]

In order to achieve the above object, the invention according to claim 1 is provided with a semicircular saddle and a band along the outer circumference of the water pipe, and the saddle is provided with a pipe of the water pipe. In the saddle distribution faucet, in which a water faucet that connects the water intake hole formed in the wall and the water supply pipe is fixed, and the saddle and the band are fastened with a fastener with the water distribution pipe in between, The faucet body is made of a different metal, and a plurality of bolt insertion holes are formed in the flange of the water faucet body, and the bolts of the flange are inserted into the saddle mounting seat facing the flange of the water faucet body. A plurality of bolt insertion holes penetrating the front and back corresponding to the holes are provided, a wide mouth is provided on the back surface of the bolt insertion hole of the mounting seat, and between the flange part of the water faucet body and the saddle mounting seat. , Into the bolt insertion hole on the flange of the water faucet body An insulating sheet having a plurality of corresponding bolt insertion holes is arranged, and a bolt made of a metal different from the saddle is inserted into each of the bolt insertion holes of the water faucet body, the insulating sheet and the saddle, and the bolt is provided at the wide opening. A nut made of the same kind of metal as the head or the bolt is arranged, and by fastening the bolt and the nut, the flange portion of the water faucet body and the seat of the saddle are fastened and fixed with an insulating sheet in between. An insulating member is provided between the bolt or nut and the saddle to provide a saddle water faucet.

The first feature of the present invention is that an insulating sheet is interposed between the seat of the saddle and the flange of the water faucet body so that the two do not come into direct contact with each other. As a result, it is possible to prevent electrolytic corrosion on the contact surface between the saddle made of dissimilar metal and the water faucet body. A second feature of the present invention is that a bolt for fixing a water faucet is not screwed into a screw hole of a saddle, but a bolt insertion hole is provided in the saddle, the bolt is inserted into the bolt insertion hole, and a nut is used. Have been fastened. Therefore, there is a gap between the saddle and the bolt or nut, and an insulating member is interposed between the saddle and the nut, so that electrolytic corrosion between the two made of different metals can be reliably prevented. If the head of the bolt or the nut protrudes toward the inner peripheral side of the saddle, it interferes with the water pipe and the saddle cannot be brought into close contact with the water pipe. Therefore, a wide mouth is provided on the back surface of the bolt insertion hole, and the head of the bolt or the nut is arranged in the wide mouth to prevent the head of the bolt or the nut from interfering with the water pipe. In the present invention, the water faucet body and the bolt or nut may be made of the same metal or different metals. In the case of dissimilar metals, it is necessary to interpose an insulating member between the bolt or nut and the water faucet body.

According to a second aspect of the present invention, the wide mouth portion is formed to have a non-circular cross section, and a non-circular convex portion which is fitted to the wide mouth portion and is prevented from rotating is provided on the outer peripheral portion of the insulating member. The portion may be provided with a non-circular fitting hole for locking the head of the bolt or the nut for fitting. As described above, the wide mouth portion prevents the head portion or the nut of the bolt from protruding toward the inner peripheral side of the saddle and interfering with the water distribution pipe. However, in the second aspect, other than that, an insulating member is used. A function to stop the head of the bolt or the nut from rotating is added to facilitate the fastening work.
For example, if the wide-mouthed portion has a substantially quadrangular shape, the non-circular convex portion of the insulating member has a substantially quadrangular shape similar to the wide-mouthed portion, and the non-circular fitting hole has a hexagonal shape, the hexagonal bolt or nut can be securely stopped. .

[0009]

2 to 7 show an example of a saddle water tap according to the present invention. Saddle water tap B of this embodiment
Since its schematic configuration is similar to that of the saddle dip A shown in FIG. 1, the same parts as those in FIG. In particular, the structures of the band 2 and the water dip 3 are exactly the same as the conventional example (FIG. 1).

A mounting seat 10 having a flat upper surface is provided at the center of the saddle 1, and bolt insertion holes 11 are formed at four corners of the mounting seat 10 to penetrate the front and back. A wide mouth 12 having a non-circular cross section is provided on the back surface of each bolt insertion hole 11 (see FIG. 5).
(See) is provided. In this embodiment, the wide mouth portion 12
Is formed into a substantially quadrangular shape with rounded corners, but may be a hexagonal shape or another non-circular shape. Mounting seat 10
An annular recess 13 is provided in the central portion of the, and an opening hole 14 penetrating the front and back is provided in the central portion. A saddle packing 60, which is in close contact with the outer circumference of the water distribution pipe 50, is fitted to the back surface side of the opening hole 14, and the water distribution pipe 50 and the saddle 1 are sealed by the saddle packing 60.
An O-ring 61 that seals between a gasket plug 35 described later and the saddle 1 is arranged at the bottom of the recess 13. As shown in FIG. 4, a bush 62 serving as a guide for the punching machine is inserted into the inner periphery of the opening hole 14. The bush 62 is made of the same kind of metal as the water faucet 3, for example, a copper alloy, and is a different kind of metal from the saddle 1 made of cast iron, but an O-ring 63 is provided between the upper flange 62 a of the bush 62 and the opening hole 14. Since the lower part of the bush 62 is in contact with the saddle packing 60, the bush 62 and the saddle 1
Direct contact with and prevents electrolytic corrosion. The upward movement of the bush 62 is regulated by the step portion 35b formed on the inner peripheral portion of the gasket plug 35 described later, and the downward movement thereof is regulated by the O-ring 63. Also, the bush 62
When the outer peripheral surface of the sheet comes into contact with the saddle packing 60, it is steady in the left and right directions. As a result, the bush 62 is reliably positioned.

The flange portion 31 of the water dip body 30 is fixed on the mounting seat 10 via a flat insulating sheet 70. That is, the water faucet 3 includes a main body 30, a ball valve body 33 housed therein, a pair of left and right ball seats 34 for sealing the periphery of the ball valve body 33, and a body of the water faucet body 30 for supporting the ball seat 34. A gasket plug 35 screwed to the bottom, a spindle 36 for rotating the ball valve element 33, and a spindle cap 3 screwed to the water dip body 30 to prevent the spindle 36 from coming off.
7. A cap 38 for closing the upper opening 30a of the water dip body 30 is provided. A connection port 30b to which the water supply pipe 55 is connected is integrally provided on a side portion of the water faucet body 30 so as to project therefrom. Ball valve element 33, gasket plug 35, spindle 36, spindle cap 37 and cap 38
Is formed of the same metal as the water faucet body 30, for example, stainless steel or a copper alloy.

The insulating sheet 70 is made of, for example, an insulating resin such as PC, and as shown in FIG. 6, a central hole 71 into which the boss portion 35a protruding from the lower surface of the gasket plug 35 is fitted is provided in the central portion thereof. An annular rib 72 is projectingly provided on the lower surface side of the center hole 71. The rib 72 is fitted and positioned in the annular recess 13 formed in the mounting seat 10 of the saddle 1. At four corners of the insulating sheet 70, the bolt insertion holes 32 provided in the flange portion 31 of the water faucet 3 are provided.
Also, a bolt insertion hole 73 corresponding to the bolt insertion hole 11 of the mounting seat 10 is formed. Since the insulating sheet 70 is interposed between the mounting seat 10 of the saddle 1 and the flange portion 31 of the water faucet 3 as described above, the mounting seat 10 made of a dissimilar metal and the flange portion 31 do not come into direct contact with each other, and the electric power is not generated. Food can be reliably prevented. When an elastic material such as a rubber plate is used as the insulating sheet 70, the O-ring 61 can be omitted because the insulating sheet 70 functions as a sealing material.

The bolt 40 is inserted from below into the bolt insertion hole 32 provided in the flange portion 31 of the water dip 3, the bolt insertion hole 73 of the insulating sheet 70 and the bolt insertion hole 11 of the mounting seat 10, and the tip thereof. By screwing the cap nut 41 to the portion, the water dip 3, the insulating sheet 70, and the saddle 1 are integrally fastened. Although the cap nut 41 is used here, it goes without saying that a normal nut may be used. The bolt 40 and the cap nut 41 are made of the same material having excellent rustproof property, for example, stainless steel. The hexagonal head portion 40 a of the bolt 40 is arranged in the wide mouth portion 12 provided on the back surface portion of the bolt insertion hole 11 and is prevented from rotating through the insulating pipe 80. That is, the head 40 of the bolt 40
The a and the shaft portion 40b are inserted into an insulating pipe 80 which is an example of the insulating member shown in FIG. The insulating pipe 80 is formed integrally with, for example, a PC, and has a non-circular convex portion 81 fitted to the wide mouth portion 12 and prevented from rotating at one end thereof.
Is formed, and the head portion 4 of the bolt 40 is formed inside the convex portion 81.
A hexagonal fitting hole 82 for receiving 0a is formed. At the other end of the insulating pipe 80, the bolt insertion hole 1
A cylindrical portion 83 that is commonly inserted in 1, 73 and 32 is formed, and a plurality of small protrusions 84 for locking the bolt 40 are formed on the inner periphery of the cylindrical portion 83. When the bolt 40 is press-fitted into the insulating pipe 80, the insulating pipe 80 is prevented from coming off from the bolt 40 by the small protrusion 84. In this embodiment, the insulating pipe 80 is inserted through the bolt insertion hole 73 of the insulating sheet 70 and into the bolt insertion hole 32 of the water faucet body 30, so that the shaft 40b of the bolt 40 is almost entirely covered. Surrounds. Therefore, the insulating pipe 80 is provided not only between the bolt 40 and the saddle 1 but also between the bolt 40 and the water dip body 30, so that electrolytic corrosion due to contact of dissimilar metals can be reliably prevented. As mentioned above, bolt 40
Since the head portion 40a of the head is stopped by the wide mouth portion 12 via the insulating pipe 80, it is not necessary to hold the bolt 40 when the cap nut 41 is fastened, and the fastening work is facilitated.

The cap nut 41 is the flange portion 31 of the water faucet 3.
Is located on the upper surface of the cap nut 41 and the flange portion 31.
Between them, for example, a spring washer 95 made of stainless steel, a flat washer 96 made of stainless steel, and an insulating flat washer 90 are sequentially arranged from above. The insulating washer 90 is formed of, for example, a PC. for that reason,
Even if the water faucet body 30 and the cap nut 41 are made of different metals, the insulating washer 90 prevents electrolytic corrosion.

In the saddle water faucet B, the bolt 4 is provided between the mounting seat 10 of the saddle 1 and the flange portion 31 of the water faucet 3.
The electrolytic members are prevented by interposing insulating members 70 and 80 between 0 and the saddle 1, and between the bolt 40 and the water faucet 3, but in addition, the saddle 1 and the band 2, Insulating members 97 and 98 are also interposed between the bolt 45 and the nut 46 for fastening them. That is, as shown in FIG. 2, an insulating cover 97 that covers the head portion 45 a of the bolt 45 is provided, and the cylindrical portion 97 a of this insulating cover 97 is inserted into the bolt insertion hole 21 of the band 2. Similarly, a cylindrical portion 9 is provided between the saddle 1 and the nut 46.
An insulating washer 98 having a cylindrical portion 98
A is inserted into the bolt insertion hole 15 of the saddle 1. Therefore, the bolt 45 and the nut 46 are insulated from the saddle 1. Since the stainless steel bolt 45 or nut 46 does not directly contact the cast iron saddle 1 and the band 2 in this manner, electrolytic corrosion between them can be prevented.

In the saddle water faucet B having the above structure, the water intake hole 51 is formed in the water distribution pipe 50 by the following procedure. First, the saddle 1 with the water diversion tap 3 fixed to the water distribution pipe 50.
And the band 2 are fastened, and the saddle packing 60 is brought into close contact with the outer circumference of the water distribution pipe 50. In this state, the vertical hole 33a of the ball valve element 33 is set upright, the cap 38 is removed, the perforator is inserted through the upper opening 30a, and the water intake hole 51 is bored in the pipe wall of the water pipe 50. The bush 62 has a role of guiding the punching machine. After forming the water intake hole 51, the punching machine is pulled out from the vertical hole 33a of the ball valve body 33, and the ball valve body 33 is rotated by about 90 °. As a result, the water pipe 50
It is possible to supply the water flowing inside the water supply pipe 55 through the lateral hole 33b of the ball valve element 33 and the connection port 30b.

FIG. 8 shows a second embodiment of the insulating structure. This embodiment corresponds to the bolt 40 and the cap nut 4 in the first embodiment.
It is a reverse arrangement of 1. That is, the bolt 40 is inserted from the side of the flange portion 31 of the water dip 3 and the shaft portion 4 thereof is inserted.
0b is screwed into the cap nut 41 fitted in the fitting hole 82 of the insulating pipe 80. Since the outer shape of the cap nut 41 is the same as that of the head 40a of the bolt 40, the reverse arrangement as described above is also possible.

FIG. 9 shows a third embodiment of the insulating structure. In this embodiment, the cylindrical portion 83 of the insulating pipe 80 is made slightly shorter so that it can be inserted only into the bolt insertion hole 11 of the mounting seat 10. Further, the cylindrical portion 91 is provided on the flange portion 31 side.
An insulating washer 90 having a cylindrical portion 91
Is inserted into the bolt insertion hole 32 of the flange portion 31. In this case, the bolt insertion hole 73 of the insulating sheet 70
The inner diameter of may be close to the shaft diameter of the bolt 40.

FIG. 10 shows a fourth embodiment of the insulating structure. In this embodiment, the flange portion 3 is formed on the surface of the insulating sheet 70.
The cylindrical portion 74 inserted into the first bolt insertion hole 32 is integrally formed. In this case, the cylindrical portion 83 of the insulating pipe 80 may have a length that can be inserted only into the bolt insertion hole 11 of the mounting seat 10 as in the third embodiment.

The insulating structure of the present invention is not limited to the above embodiment. Insulating members 80, 9 for insulating the bolt 40 and the cap nut 41 from the saddle 1 and the water faucet 3.
The shape of 0 is arbitrary such as a washer shape and a cylindrical shape,
It is sufficient that at least the bolt 40 or the nut 41 and the saddle 1 or the water dip 3 are not in direct contact with each other. Also, the insulating member and the insulating sheet can be integrally formed. For example, the cylindrical portions may be integrally provided on the front and back surfaces of the insulating sheet 70. In this case, FIG.
The cylindrical portion 83 of the insulating pipe 80 in this embodiment can be omitted. Further, although the head of the bolt 40 or the nut 41 is prevented from rotating at the wide mouth portion 12, the shape of the wide mouth portion is not limited at all, and may be provided individually for each bolt insertion hole 11. Plural bolt insertion holes 11
It may be an annular wide mouth common to Therefore,
The wide-mouth portion 12 may not have a rotation stopping function. Although insulating members such as PC are used as the insulating sheet 70 and the insulating pipe 80 in the above embodiments, an insulating coating or coating may be used. For example, the mounting seat 10
The surface of or the lower surface of the flange portion 31 of the water dip 3 may be coated with resin, or the inner surfaces of the bolt insertion holes 11 and 32 may be coated with resin. Further, the surface of the bolt 40 may be coated with resin. In the above embodiment, the water faucet body 3
Although 0, the bolt 40, and the nut 41 are different metals, they may be the same metal. In the case of the same metal, the insulating washer 90 can be omitted.

[0021]

As is apparent from the above description, according to the present invention, an insulating sheet is interposed between the seat of the saddle and the flange of the body of the water faucet so that the two do not come into direct contact with each other. Therefore, it is possible to prevent electrolytic corrosion on the contact surface between the saddle made of different kinds of metals and the water main body. In addition, in order to fix the saddle mounting seat and the water faucet body, a bolt insertion hole is provided in the saddle, a bolt is inserted into this bolt insertion hole, and a nut is used to fasten the saddle and the bolt or nut. Since the insulating member is interposed therebetween, electrolytic corrosion at the contact surface between the saddle made of a different kind of metal and the bolt or nut can be prevented. Further, in the present invention, since the wide mouth portion is provided on the back surface portion of the bolt insertion hole of the saddle, and the head portion or the nut of the bolt is arranged in this wide mouth portion, the head portion or the nut of the bolt should not protrude to the inner peripheral side of the saddle. Therefore, the interference with the water pipe can be prevented.

[Brief description of drawings]

FIG. 1 is a perspective view of an example of a saddle water tap that is a premise of the present invention.

FIG. 2 is a sectional view of an example of a saddle water faucet according to the present invention.

3 is a plan view of the saddle water faucet shown in FIG. 2. FIG.

FIG. 4 is a sectional view taken along line XX of FIG.

FIG. 5 is a plan view of a saddle.

FIG. 6 is a plan view and an YY cross-sectional view of an insulating sheet.

FIG. 7 is a sectional view and a bottom view of the insulating pipe.

FIG. 8 is a sectional view taken along line XX in the second example of the insulating structure.

FIG. 9 is a sectional view taken along line XX in the third example of the insulating structure.

FIG. 10 is a sectional view taken along line XX in the fourth example of the insulating structure.

[Explanation of symbols]

1 saddle Two bands 3 minute faucet 10 mounting seat 11,32,73 bolt insertion hole 12 wide mouth 30 minutes faucet body 31 Flange 50 water pipe 51 Water intake hole 55 Water pipe 70 Insulation sheet 80 insulated pipes 90 Insulation washer

Claims (2)

[Claims] 1. A water faucet main body comprising a semi-circular saddle and a band along the outer circumference of a water distribution pipe, and connecting the water intake pipe and the water intake pipe formed in the pipe wall of the water distribution pipe to the saddle. In the saddle water faucet in which the saddle and the band are fastened with a fastener with the water pipe in between, the saddle and the water faucet body are made of different kinds of metal, and plural pieces are provided on the flange portion of the water faucet body. Is formed with a bolt insertion hole of the saddle, the seat of the saddle facing the flange portion of the water faucet body, a plurality of bolt insertion holes penetrating the front and back corresponding to the bolt insertion hole of the flange portion are provided. A wide mouth is provided on the back side of the bolt insertion hole of the, and a plurality of bolt insertion holes corresponding to the bolt insertion holes of the flange portion of the water faucet body are inserted between the flange portion of the water faucet body and the mounting seat of the saddle. An insulating sheet with holes is placed and A bolt made of a different kind of metal is inserted through each of the bolt insertion holes of the water faucet body, the insulating sheet and the saddle, and a head made of the same bolt or a nut made of the same metal as the bolt is arranged at the wide mouth portion. By fastening the bolt and nut, the flange of the water faucet body and the seat of the saddle are fastened and fixed with the insulating sheet in between, and the insulating member is interposed between the bolt or nut and the saddle. Saddle water faucet characterized by having. 2. The wide mouth portion is formed to have a non-circular cross section, a non-circular convex portion which is fitted to the wide mouth portion and is prevented from rotating is provided on the outer peripheral portion of the insulating member, and the inner peripheral portion of the convex portion is provided. The saddle water faucet according to claim 1, further comprising a non-circular fitting hole for locking the head of the bolt or the nut against fitting.