JP4361260B2 - Anti-corrosion sleeve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an anti-corrosion sleeve, and more specifically, when a water faucet for installing a branch pipe from a main pipe of a water supply pipe to a branch pipe is drilled, a hole serving as a water inlet is drilled in the metal pipe that is the main pipe. The present invention relates to an anti-corrosion sleeve to be attached to prevent corrosion of a cutting surface of a wall.
[0002]
[Prior art]
Conventionally, as this type of anti-corrosion sleeve, for example, there is an anti-corrosion sleeve configured by inserting a corrosion-resistant metal sleeve into an elastic sleeve, and this anti-corrosion sleeve is made of metal using a dedicated tool. In general, an anti-corrosion sleeve is inserted into a perforated hole provided in a main pipe, and the elastic sleeve of the anti-corrosion sleeve is brought into intimate contact with the cut surface of the perforated hole.
[0003]
This anticorrosion sleeve may be deformed such as the elastic sleeve being bent due to the pressure when inserting the dedicated tool and the metal sleeve, so there is a possibility that the anticorrosion sleeve as a whole cannot be securely attached, For example, an anticorrosion sleeve as disclosed in Patent Document 1 is disclosed.
[0004]
This anti-corrosion sleeve forms one to several pairs of locking rods that engage with the upper edge of the elastic sleeve at the upper end of the metal sleeve, and a reinforcing ring is attached to the outer periphery of the stepped portion of the elastic sleeve. It is a thing. After the anticorrosion sleeve is mounted, the reinforcement ring is intended to prevent deformation of the upper half of the anticorrosion sleeve. For example, the reinforcement ring has a large diameter such as a nominal diameter of 30, 40, 50 (mm). On the other hand, it is mainly used.
[0005]
[Patent Document 1]
JP-A-8-14480 [0006]
[Problems to be solved by the invention]
However, since the anticorrosion sleeve of Patent Document 1 is such that a metal sleeve is attached to an elastic sleeve made of rubber, this elastic sleeve has sufficient rigidity even if a reinforcing ring is attached. However, it was difficult to reliably prevent deformation during insertion.
[0007]
In particular, when the anti-corrosion sleeve is installed, if the branch plug is displaced with respect to the branch hole, the sleeve does not enter the center of the branch hole, and a part of the sleeve's collar part is dropped, so-called shoulder dropping occurs. Further, there is a possibility that a problem such as so-called drop-out occurs, in which the entire sleeve falls out when the insertion operation is continued in a state where the sleeve falls or is pushed too much.
[0008]
In addition, when inserting a metal sleeve inside the elastic sleeve, even if a dedicated tool is used, it is difficult to expand the diameter of the metal sleeve to a perfect circle. In some cases, it was difficult to secure the water flow diameter.
[0009]
The operator normally determines that the insertion of the anticorrosion sleeve has been completed by hand, but this response is determined by abutment of the collar portion provided in the elastic sleeve with the metal tube which is the main tube. . In the case of a rubber sleeve, since the rigidity is low, it is very difficult to judge the mounting state by its response. For this reason, a dedicated tool is equipped with a jig called a spacer, and the degree of insertion during insertion is adjusted by this spacer. This jig manufactures each dedicated tool used and a water faucet. However, the use was limited for each manufacturer, and the insertion could not be confirmed correctly if it did not correspond to the specifications of the dedicated tool and the water faucet of each manufacturer.
Therefore, in the end, the push-in is insufficient and the insertion is insufficient, or the rubber sleeve is deformed due to the excessive push-in, so that a sufficient sealing property cannot be obtained, or the drop-out is prevented. It was also difficult.
[0010]
In addition, when the branch hole diameter is large, the center of the water faucet with a saddle is likely to be displaced with respect to the mounting position, and thus the center of the water faucet with a saddle is slightly displaced so that the reinforcing ring is located on the outer peripheral side of the branch hole. If it is not positioned correctly, there is a risk that the entire anticorrosion sleeve will enter from the perforated hole and fall together with the reinforcing ring by continuing the insertion operation.
[0011]
This reinforcing ring must be prepared each time according to the diameter of each elastic sleeve at the time of manufacture, and more labor is required in the manufacturing process for mounting on the elastic sleeve, resulting in an increase in cost. In addition, due to the structure that the elastic sleeve is attached to the outer periphery of the collar portion of the elastic sleeve, this reinforcing ring has a small diameter, so it may be easily deformed and the effect as a reinforcement may not be expected. There was a possibility to do. As described above, there is a case where the elastic sleeve is deformed due to deformation or cutting of the reinforcing ring and sufficient sealing performance cannot be obtained.
[0012]
Further, since the anticorrosion sleeve is inserted into the perforation hole provided in the arc portion on the outer periphery of the metal tube, the outer peripheral surface side of the cylindrical elastic sleeve is brought into close contact with the entire wall surface of the bent perforation hole. This is difficult, and it cannot be said that there is no problem in the sealing performance after the anticorrosion sleeve is attached, regardless of the presence or absence of the reinforcing ring.
[0013]
The present invention has been developed to solve the above-mentioned problems, and the object of the present invention is an anticorrosion sleeve that can be securely attached to a bored hole of a main pipe and is easy to install. An object is to provide a low-cost anti-corrosion sleeve.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, the lower end of the rigid sleeve is inserted into the inner peripheral side opening of the flange formed at the upper end of the resin sleeve, and a tapered surface is formed below the flange of the resin sleeve. A thin cylindrical portion is extended through the portion, and the length of the tapered surface portion is the perforation in the direction intersecting the pipe direction from the top of the perforation hole in the direction along the pipe of the metal pipe When the rigid sleeve is inserted into the resin sleeve with a length equal to or longer than the hole edge of the hole, a part of the lower surface of the flange portion is locked to the pipe top and the diameter is increased. An anticorrosion sleeve in which the planar portion is pressed against the hole edge of the perforated hole in an annular shape and the tapered planar portion is locked to the hole edge in a sealed state.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the anticorrosion sleeve according to the present invention will be described in detail with reference to the drawings. In FIG. 1, it is sectional drawing which shows the state which installed the water stopcock 3 with the saddle which has the water stop mechanism 2 for performing branch piping from the main pipe 1 of water supply piping to a branch pipe. A mortar lining layer or a resin lining layer 1 a is formed on the inner surface of the metal tube 1, and a saddle 13 and a band 14 are fixed to the metal tube 1 via bolts and nuts 15. A stopper 3 is fixed with a bolt (not shown), and a water stop mechanism 2 in which a ball 2b having a T-shaped through hole 2a is rotatably provided via a stem 2c is incorporated in the water stopper 3 with a saddle. is doing. In the figure, 2d is a pair of ball sheets. The saddle-equipped water faucet 3 is provided with a branch portion 18 having a joint portion 17 for connecting a branch pipe.
In the figure, when a water passage 4 as a mounting hole is drilled in a metal pipe 1 as a main pipe with a drilling tool (not shown), the anticorrosion sleeve body is used to prevent corrosion of the cutting surface of the hole wall 5. 6 is installed.
[0016]
The sleeve body 6 includes a resin sleeve 8 that is a resin cylinder layer that has a good sliding characteristic and a large elongation characteristic on the inner diameter side of an elastic sleeve 7 that is a rubber sleeve described later. By inserting a metal sleeve 11 (or a rigid hard resin sleeve, which is a rigid sleeve) made of a rigid material such as a product, the diameter of the resin sleeve 8 is increased, and at the same time the elastic sleeve 7 is expanded to increase the diameter of the perforated hole 4. The elastic sleeve 7 is adhered to the cutting surface portion of the hole wall 5 to prevent corrosion.
[0017]
In this case, the resin sleeve 8 having a good sliding characteristic is used to facilitate the insertion of the rigid sleeve 11 on the inner diameter side of the elastic sleeve 7, and the elongation characteristic is increased to facilitate the diameter expansion. . These two characteristics can be ensured by, for example, manufacturing the resin sleeve 8 made of linear low density polyethylene.
[0018]
Although not shown, the sleeve body may be coated with a resin having good sliding characteristics and large elongation characteristics on the inner diameter side of the elastic sleeve. In this case, the elastic sleeve itself has a tapered surface on the upper end and on the lower surface side. It is only necessary to form a protrusion on the collar portion having the portion and the inner peripheral surface of the lower end, and to coat and mold the entire inner diameter side of the elastic sleeve. In this case, hard rubber or the like having high hardness may be used to increase the rigidity of the elastic sleeve. Moreover, the resin sleeve may be coated with rubber. Further, it may be formed by simultaneous molding of resin and rubber.
In any case, it is desirable that the metal layer, the resin layer, and the elastic layer be set thin so that they can be mounted even with a drill that is currently used normally.
[0019]
The resin sleeve 8 is provided with a flange portion 8a at the upper end, a tapered surface portion 8b is provided on the lower surface side of the flange portion 8a, and the tapered surface portion 8b is brought into close contact with the cutting surface portion of the hole wall 5, The taper surface portion 8b prevents the deformation and drop when the rigid sleeve 11 is inserted, and ensures sealing performance.
[0020]
As shown in FIG. 8, the length of the tapered surface portion 8b is the length from the tube top 1b in the direction along the pipe line of the metal tube 1 provided with the perforated hole 4 to the upper end portion 5a of the cutting surface of the hole wall 5. When the thickness is A, the length of the resin sleeve 8 is not less than the length A. By expanding the diameter of the resin sleeve 8, the taper surface portion 8 b comes into contact with the entire upper peripheral edge of the hole wall 5, thereby After positioning the sleeve 8, the resin sleeve 8 and the hole wall 5 are brought into close contact with each other through the elastic sleeve 7 to ensure a sealing property.
[0021]
Further, when the resin sleeve 8 is inserted, the lower surface of the flange portion 8 a at the upper end of the resin sleeve 8 is engaged with the tube top 1 b of the hole edge 4 a of the hole 4, and the resin sleeve 8 is lowered when the rigid sleeve 11 is inserted. It is preventing.
[0022]
The taper angle of the taper surface portion 8b of the resin sleeve 8 is set in a range of 10 to 45 °. If the taper angle is 10 ° or less, it is not sufficient to prevent the resin sleeve 8 from being deformed. In addition, if it is 45 ° or more, the alignment function that works at the time of insertion into the perforated hole 4 may be insufficient, and more preferably about 10 to 30 °. An inclined surface 8d for aligning and inserting the rigid sleeve 11 on the inner peripheral surface of the opening of the flange portion 8a is provided.
[0023]
Further, the resin sleeve 8 is provided with a thin cylindrical portion extending below the tapered surface portion 8 b, and a claw-shaped protrusion 8 c is formed at the lower end of the cylindrical portion so as to be inclined toward the inner diameter side of the resin sleeve 8. In addition, the protrusion 8c prevents the drop-out at the time of attachment to the mounting tool 12. The protrusions 8c have a length that is about 1/10 or less of the outer periphery of the resin sleeve 8, and the number of the protrusions 8c is such that the resin sleeve 8 can be kept horizontal when mounted on the mounting tool 12. Therefore, at least 3 or more was set.
[0024]
The outer shape of the resin sleeve 8 is a two-stage structure for preventing harmful substances from leaching from the paint painted on the surface of the water distribution pipe and mixing into the tap water, and is formed in the groove 8f provided in the upper collar 8a. An O-ring 8e is provided to perform sealing so as to be in contact with the bush 19 of the water faucet 3 with a saddle. The O-ring 8e may be a rubber band or the like.
The bush 19 is provided to prevent the water passage diameter from being reduced due to the deformation of the gasket 22. Specifically, the gasket 22 is a rubber seal member that seals the saddle 13 and the metal tube 1. When attaching the water faucet 3 with a saddle to the metal pipe 1, the bolts and nuts 15 are fastened and attached. At this time, the gasket 22 is compressed, and the compressed rubber tends to spread toward the water passage diameter side. The water diameter may be reduced. Therefore, by providing the bushing 19 to ensure the water passage diameter, the gasket 22 that attempts to spread toward the water passage diameter side comes into contact with the bushing 19, so that the water passage diameter is secured.
[0025]
In the rigid sleeve 11, 11 b is a locking groove formed on the outer peripheral surface, and the locking groove 11 b prevents the rigid sleeve 11 from being pulled out from the resin sleeve 8. This locking groove 11b may be shot processing or the like for preventing drawing. When the diameter expansion is completed, the resin sleeve 8 is pressure-bonded to the rigid sleeve 11 by the restoring force. Therefore, the resin sleeve 8 is not easily pulled out without any special measures for preventing the drawing.
[0026]
As shown in FIG. 6, a cylindrical body 12b of a mounting tool 12 having a flange portion 12a at the upper end portion and an engagement groove 12c formed at the outer peripheral portion of the lower end is provided with a resin sleeve on the inner diameter side of the rigid sleeve 11 and the elastic sleeve 7. 8 is inserted, the lower end of the rigid sleeve 11 is inserted into the opening 10 of the resin sleeve 8, and is formed in the engagement groove 12c of the cylindrical body 12b so as to be inclined toward the inner diameter side of the lower end of the resin sleeve 8. The protrusion 8c engages and is mounted on the mounting tool 12 as the sleeve body 6 as shown in FIG. In this state, the sleeve main body 6 is mounted in the perforated hole 4 of the metal tube 1 described later by the mounting tool 12.
[0027]
The mounting tool 12 is provided with a first taper 12d, a second taper 12e, and a third taper 12f from the front end side, and the first taper 12d is an engagement portion for preventing the sleeve main body 6 from falling off as being attached to the mounting tool 12. It is a taper for attaching to the level | step difference for latching the projection part 8c of the resin sleeve 8 provided as. Further, the second taper 12e expands the protrusion 8c of the resin sleeve 8, and the tip side of the resin sleeve 8 is always in contact with the side surface of the mounting tool 12 between the first taper 12d and the second taper 12f. In addition to preventing the sleeve tip from blurring, the tip side is prevented from being deformed into an elliptical shape. The third taper 12f, together so as to expanded resin sleeve 8 from the flange portion 8a in order to insert the rigid sleeve 11, and guides the distal end of the rigid sleeve 11. The second taper 12e and the third taper 12f may be combined into one taper.
[0028]
Next, an example in which the sleeve body 6 is attached to the water faucet 3 with a saddle and the hole wall 5 of the metal tube 1 will be described. To insert the sleeve body 6 to the mounting tool 12 is first screwed operating rod (not shown) in the mounting tool 12, the cylindrical body 12b of the mounting tool 12 by inserting the rigid sleeve 11 flange of the rigid sleeve 11 Next, the sleeve body 6 having the resin sleeve 8 on the inner diameter side of the elastic sleeve 7 is inserted into the cylindrical body 12b and the engaging groove of the cylindrical body 12b is inserted into the rigid sleeve 11. A protrusion 8 c formed at the lower end of the resin sleeve 8 is engaged with 12 c, and the sleeve body 6 is temporarily fixed to the mounting tool 12 with the lower end of the rigid sleeve 11 inserted into the opening 10 of the resin sleeve 8. When this mounting tool 12 is inserted into the perforated hole 4 of the metal tube 1 through the flow path 2a of the ball valve body 2b in the water stop mechanism 2 of the water stopcock 3 with a saddle, as shown in FIG. A part of the lower surface of the flange portion 8a abuts on the top 1b of the metal tube 1 along the pipe direction, the tapered surface portion 8b faces the hole edge 4a, and the side surface of the elastic sleeve 7 is the hole wall. Opposite to 5.
[0029]
Next, as shown in FIG. 3, by inserting the mounting tool 12, the rigid sleeve 11 is inserted into the inner peripheral surface of the resin sleeve 8 to expand the resin sleeve 8. At this time, the O-ring 8e presses against the inner surface of the bush 19 to ensure the sealing performance of the resin sleeve 8 and the water faucet 3 with the saddle. When the mounting tool 12 is further inserted, the diameter of the elastic sleeve 7 is expanded as shown in FIG. 4, and the elastic sleeve 7 is brought into close contact with the cutting surface of the hole wall 5 of the perforated hole 4. The sleeve body 6 is mounted in a sealed state.
1 to 4, the state when the sleeve is inserted is illustrated from the direction of the tube end of the metal tube 1, and the state near the tapered surface portion 8 b at this time is along the pipe line of the metal tube 1. This will be described with reference to FIG.
[0030]
In FIG. 5, first, as shown in FIG. 5A, the maximum outer diameter of the tapered surface portion 8 b provided below the flange portion 8 a of the resin sleeve 8 is set as the state before the diameter expansion. Since the diameter is equal to or smaller than the hole diameter, the tapered surface portion 8 b is opposed to the hole wall 5 of the hole 4 and is opposed to the hole. At this time, a part of the lower surface of the flange portion 8a is in a state of being locked to the top 1b of the perforated hole 4 as shown in FIG.
[0031]
Next, when the diameter expansion is started by the mounting tool 12, the resin sleeve 8 and the elastic sleeve 7 are expanded in diameter with the insertion of the rigid sleeve 11, and as shown in FIG. The diameter of the portion 8 a is increased, and the O-ring 8 e is pressed against the inner peripheral surface of the bush 19. When the rigid sleeve 11 is subsequently inserted, the tapered surface portion 8b and the hole wall 5 of the hole 4 are brought into contact with each other as shown in FIG. At this time, the entire sleeve body 6 tends to be pushed in the insertion direction of the rigid sleeve 11, but is blocked by the lower surface of the flange portion 8a and the tapered surface portion 8b.
[0032]
When the diameter of the sleeve is further increased, line contact or surface contact is started at the contact portion B between the tapered surface portion 8b and the hole wall 5 of the perforation hole 4, particularly the hole edge 4a of the perforation hole 4. Acts as a locking portion that prevents the entire sleeve body 6 from being pushed in the insertion direction of the rigid sleeve 11. The contact portion B expands with the diameter of the sleeve, and the height of the tapered surface portion 8b is greater than the length A from the top 1b of the metal tube 1 to the top end 5a of the cutting surface of the hole wall 5. By securing a longer length, as shown in FIG. 5 (d), after the sleeve is inserted, the tapered surface portion 8b and the hole edge 4a come into contact in an annular shape, and the contact portion B becomes in an annular shape.
The tapered surface portion 8 b is expanded in diameter with the insertion of the rigid sleeve 11 and is pressed against the hole wall 5. Further, after the diameter of the tapered surface portion 8 b is increased, the thin cylindrical portion is also increased in diameter and pressed against the hole wall 5.
[0033]
Accordingly, when the resin sleeve 8 is inserted, the lower surface of the flange portion 8a is first supported near the periphery of the perforated hole 4, but in this state, the rigid sleeve 11 is inserted into the resin sleeve 8 by the mounting tool 12. Then, the diameter of the resin sleeve 8 is increased, and the tapered surface portion 8b and the hole edge 4a of the perforated hole 4 are sequentially contacted to form an annular contact portion B, and this contact portion B serves as a locking portion. The sleeve 8 can be supported. That is, the sleeve body 6 can be positioned by fixing the resin sleeve 8 in the vicinity of the hole edge 4a of the perforated hole 4 by a part of the lower surface of the flange portion 8a and the tapered surface-shaped portion 8b. In addition, the side surface of the elastic sleeve 7 can be brought into close contact with the hole wall 5 of the perforated hole 4 while preventing depression.
[0034]
In this way, the tapered surface portion 8b can prevent the resin sleeve 8 from moving in the insertion direction of the rigid sleeve 11, and there is no possibility that the sleeve body 6 falls off. Since the flange portion 8a formed on the resin sleeve 8 is formed of a rigid resin together with the resin sleeve 8, there is no deformation due to excessive pressing, and a response upon completion of insertion can be obtained with certainty. Of course, the insufficiency of pressing of the tool 12 can be solved.
[0035]
When a force in the insertion direction of the rigid sleeve 11 acts on the resin sleeve 8 due to friction during insertion of the rigid sleeve 11, the taper surface portion 8b can be reinforced so as to keep the flange portion 8a in an annular shape, so that the inner diameter has a predetermined water flow rate. The rigid sleeve 11 having a sufficient diameter can be inserted without resistance, and a predetermined water flow diameter can be secured.
[0036]
Further, when the resin sleeve 8 is attached to the hole wall 5, the centering function can be exerted by the tapered surface portion 8b, and the resin sleeve 8 can be accurately inserted into the water passage 4 which is a hole for mounting. .
[0037]
Further, as described above, the tapered surface portion 8b can be provided integrally at the time of molding the resin sleeve 8, so that it is easy to manufacture and does not require separate mounting, and can be provided at low cost. Since the tapered surface portion 8b can be molded with resin, it has a certain degree of compressibility, and can flexibly cope with pipes of various sizes having different curvatures.
[0038]
Further, the resin sleeve 8 is provided with a cylindrical portion extending below the tapered surface portion 8 b, and a claw-shaped protrusion 8 c is formed at the lower end of the cylindrical portion or in the vicinity of the lower end thereof. The length is 10 or less and at least three or more portions are uniformly inclined to the inner diameter side of the resin sleeve 8.
[0039]
Therefore, when the resin sleeve 8 is mounted on the mounting tool 12, the protruding portion 8 c is formed on the first taper 12 d of the mounting tool 12 as compared with the case where the protruding portion is provided in an annular shape all around the lower end of the cylindrical portion or near the lower end. The diameter of the projection 8c can be easily expanded along with it, and after the installation, the state in which the protrusion 8c is inclined toward the sleeve inner diameter side is easily restored. The groove 12c can be reliably locked.
[0040]
Also, when the inside of the resin sleeve 8 is expanded with the rigid sleeve 11, the protrusion 8 c has a second taper of the mounting tool 12 as compared with the case where the protrusion is provided in an annular shape all around the lower end of the tube or near the lower end. 12e and the third taper 12f are gradually and smoothly expanded in diameter, and the phenomenon that the tip of the rigid sleeve 11 bites into the protrusion of the resin sleeve is unlikely to occur. Therefore, it is possible to prevent the resin sleeve 8 from being dragged in the sleeve insertion direction along with the insertion of the rigid sleeve 11, so-called shoulder dropping in which the sleeve collar 8 a falls into the perforated hole 4, or sleeve from the perforated hole. In addition to preventing the dropout of the resin sleeve, the protruding portion of the resin sleeve that has not been expanded in diameter protrudes toward the inner diameter side of the rigid sleeve 11 and can prevent the occurrence of a phenomenon that hinders water flow.
[0041]
FIG. 9 is a cross-sectional view showing another example of a water faucet with a saddle according to the present invention, and shows a structure when a bush is not used. In addition, parts other than the bush can be mounted in the same manner as in the above-described embodiment, and the operation and effect thereof are also the same. Therefore, the same parts as those of the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.
[0042]
【The invention's effect】
As is clear from the above, according to the present invention, it is possible to reliably attach to the water passage which is the mounting hole without being deformed with respect to the bore hole of the main pipe, The anti-corrosion sleeve is easy to install because it can be easily confirmed that the process has been completed, and the lower surface of the collar is locked to the top of the tube, and the enlarged tapered surface is annular to the hole edge of the hole. Since the taper surface portion can be locked in a sealed state at the hole edge by pressing contact, it becomes possible to insert the rigid sleeve in a stable state in the insertion process, the collar portion is kept substantially horizontal, and perforation The anticorrosion of the hole is exhibited well.
[0043]
Furthermore, the anticorrosion sleeve can be easily inserted without being deformed more with respect to the drill hole of the main pipe.
[0044]
Further, the anticorrosion sleeve is capable of reliably performing the mounting operation by preventing a drop during the mounting.
[0045]
The anti-corrosion sleeve can be disposed at the center of the perforated hole while reducing resistance during insertion by preventing deformation of the resin sleeve.
[0046]
Furthermore, there is an advantage that the diameter is easily increased as compared with the case of the ring shape, and the insertion is easy because the resistance at the time of insertion is small.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a water faucet with a saddle according to the present invention.
FIG. 2 is a partially enlarged cross-sectional view showing a state where the anticorrosion sleeve of the present invention is attached to a metal tube.
FIG. 3 is a partially enlarged cross-sectional view showing a state in which the anticorrosion sleeve of the present invention is attached to a metal tube.
FIG. 4 is a partially enlarged cross-sectional view showing a state where the anticorrosion sleeve of the present invention is attached to a metal tube.
FIG. 5 is a partially enlarged cross-sectional view showing the attachment of the anticorrosion sleeve of the present invention to a metal pipe from a direction along the pipe line.
FIG. 6 is a separated perspective view of the anticorrosion sleeve and the mounting tool.
FIG. 7 is a perspective view showing a state in which the anticorrosion sleeve is attached to the attachment tool.
FIG. 8 is a partially enlarged cross-sectional view of a metal tube.
FIG. 9 is a cross-sectional view showing another example of a water faucet with a saddle according to the present invention.
FIG. 10 is a partially enlarged cross-sectional view of FIG.
[Explanation of symbols]
1 Metal pipe 1b Pipe top 4 Perforated hole (water inlet)
4a hole edge 5 hole wall 5a cutting surface upper end part 6 sleeve body 8 resin sleeve 8a collar part 8b taper surface part 8c protrusion part 10 opening part 11 rigid sleeve

Claims (1)

The lower end of the rigid sleeve is inserted into the inner peripheral side opening of the collar portion formed at the upper end of the resin sleeve, and a thin-walled cylindrical portion is extended via a tapered surface portion below the collar portion of the resin sleeve, The length of the tapered surface portion is not less than the length from the top of the hole in the direction along the pipe line of the metal pipe to the hole edge of the hole in the direction intersecting the pipe direction. When the rigid sleeve is inserted, a part of the lower surface of the flange portion is locked to the top of the tube, and the tapered surface portion having an enlarged diameter is pressed against the hole edge of the perforated hole over the annular shape. An anticorrosion sleeve characterized in that a tapered surface portion is locked in a sealed state at the hole edge.

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