JP3813294B2 - Attaching the anti-corrosion sleeve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of mounting anticorrosion sleeves, details upon installation of the diversion plug to a branch pipe from the main pipe of water supply pipe to the branch pipes were drilled hole as a through Mizuguchi the metal tube is a main pipe when, regarding the mounting method of corrosion protection sleeve you attached in order to prevent corrosion of the cutting surface of the pore walls.
[0002]
[Prior art]
Various examples of this type of anticorrosion sleeve have been proposed. For example, an anticorrosion sleeve described in Japanese Patent Application Laid-Open No. 4-254091 has a rubber sleeve provided on the outside of a metal sleeve that has been deformed to a reduced diameter. By forcibly expanding the diameter of the sleeve, the rubber sleeve is brought into close contact with the cutting surface of the drilled hole of the metal tube. Further, as an improvement, an anticorrosion sleeve in which a locking portion is provided at the upper end portion of the metal sleeve so that the metal sleeve is not detached from the rubber sleeve, and the locking portion is locked to the upper edge portion of the rubber sleeve. Has been proposed (see Japanese Utility Model Publication No. 7-23892). Japanese Patent Application Laid-Open No. 9-42567 also proposes a method for preventing a soft sleeve from coming off as a two-part configuration in which a soft sleeve such as a metal is press-fitted inside a soft sleeve such as a synthetic rubber soft resin.
[0003]
[Problems to be solved by the invention]
However, the above conventional anticorrosion sleeve has various problems as follows. That is, when expanding the diameter of the metal sleeve that has been deformed by the tool, the tool is affected by the fluid or the like, and the tool and the metal sleeve are tightly fitted. The resistance generated during insertion increases, or the diameter of the sleeve that has been deformed is expanded to a perfect circle, so the fitting dimension accuracy between the tool and the metal sleeve is extremely high, and the tool is polished. Cost increases for both metal sleeves and tools.
[0004]
In addition, since the conventional anticorrosion sleeve and its mounting tool are both complicated structures, they are difficult to manufacture, and this also increases the cost. In addition, the anticorrosion sleeve needs to be formed by adjusting the circumferential length so that the water inlet is formed after diameter expansion and the tool can be pulled out, and the tool is complicated to fix the anticorrosion sleeve. In addition to the need for high dimensional accuracy, if the drilling hole diameter is reduced due to repeated drilling and other wear, the probability of incomplete mounting is extremely high. It had the problem of becoming high.
[0005]
Furthermore, when an external force is applied to the water faucet itself from the position where it was first fixed to the water mains due to an earthquake, etc., the conventional anticorrosion sleeve is not high in rigidity, so the sleeve itself prevents the deviation. It was impossible to do. Japanese Patent Application Laid-Open No. 9-42567 discloses that when synthetic rubber is used, the friction resistance with the metal sleeve is high and the mounting is likely to be incomplete, and even with a soft resin, the compression set characteristics are inferior. There are drawbacks such as poor adhesion to the hole wall. The present invention has been developed as a result of intensive studies to solve the above-described conventional problems. The object of the present invention is to securely attach the anticorrosion sleeve to the cutting hole of the metal tube with a simple tool. In addition, there is no risk of the corrosion prevention sleeve falling off in the water faucet during operation without being affected by variations in the perforated holes, and the tensile force from the branching direction due to an earthquake or the direction of the pipe axis of the water main An object of the present invention is to provide an anti-corrosion sleeve and an anti-corrosion tool in which a shear force is applied to the anti-corrosion sleeve even when an external force is applied to it.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, an engagement groove is formed on the outer periphery of a mounting tool having a flange portion at the upper end portion of a cylindrical body or a cylindrical body, and the flange portion is formed below the mounting tool. A sleeve having a resin sleeve inside the elastic sleeve is inserted into the mounting tool, and the opening of the sleeve body is inserted. The lower end portion of the rigid sleeve is inserted in the vicinity, and a protrusion formed on the inner peripheral surface of the sleeve body is engaged with the engagement groove, and the mounted tool in the engaged state is attached to the metal tube for attachment. By inserting the elastic sleeve side into the hole wall of the perforated hole and further inserting the mounting tool, the outer peripheral surface of the rigid sleeve is engaged with the flange portion. The sleeve book The elastic sleeve is expanded at the same time as the diameter of the resin sleeve is expanded by being inserted into the inner peripheral surface of the resin, and the elastic sleeve is brought into close contact with the cutting surface of the hole wall of the hole to attach the anticorrosion sleeve to the hole. This is a method of mounting the anticorrosion sleeve.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a cross-sectional view showing a state in which a saddle-equipped water faucet 3 having a water stop mechanism 2 for branching from a main pipe 1 to a branch pipe is installed. In this figure, a metal pipe 1 which is a main pipe is provided with an anti-corrosion sleeve 6 for preventing corrosion of the cutting surface of the hole wall 5 when a hole serving as a water passage 4 is drilled by a drilling tool (not shown). ing.
[0008]
This anticorrosion sleeve 6 has a resin cylinder by inserting a rigid sleeve 11 through an opening 10 of a sleeve body 9 having a resin cylinder layer 8 having good sliding characteristics and large elongation characteristics on the inner diameter side of an elastic sleeve 7 described later. At the same time as expanding the diameter of the layer 8, the elastic sleeve 7 is expanded to bring the elastic sleeve 7 into close contact with the cutting surface of the hole wall 5 of the perforated hole, which is the water flow port 4.
[0009]
In this case, the sleeve main body 9 shown in the drawing is obtained by inserting a resin sleeve 8 having good sliding characteristics and high elongation characteristics on the inner diameter side of the rubber sleeve 7. By inserting a rigid thick metal sleeve 11 (or a rigid hard resin sleeve), the resin sleeve 8 is expanded, and the rubber sleeve 7 is expanded at the same time. The resin sleeve 8 is provided with a flange 8 a at the upper end, a tapered portion 8 b on the inner peripheral surface of the opening of the flange 8 a, and a protrusion 8 c on the inner peripheral surface of the lower end of the resin sleeve 8.
[0010]
In addition, although not shown, the sleeve main body 9 may be one in which the inner diameter side of the rubber sleeve 7 is coated with a resin having good sliding characteristics and high elongation characteristics. In this case, the rubber sleeve 7 itself is provided with the example shown above. In the same manner as described above, a flange is formed on the upper end and a protrusion is formed on the inner peripheral surface of the lower end, and the entire inner diameter side of the rubber sleeve 7 is coated with resin and molded.
[0011]
Further, as shown in FIG. 6, an engagement groove 12c is formed on the outer periphery of the lower end of a cylinder 12b having a flange 12a at the upper end, and the metal sleeve 11 having a flange 11a and a rubber are formed in the cylinder 12b. A sleeve main body 9 having a resin sleeve 8 is inserted into the inner diameter side of the sleeve 7 and a lower end portion of the metal sleeve 11 is inserted into the opening 10 of the resin sleeve 8, and the resin sleeve 8 is inserted into the engagement groove 12c of the cylindrical body 12b. As shown in FIG. 7, the anticorrosion sleeve 6 is attached to the attachment tool 12 by engaging the protrusion 8 c formed on the inner peripheral surface of the lower end of the attachment. Next, the anticorrosion sleeve 6 is attached to the water inlet 4 of the metal tube 1 described later with the attachment tool 12 in this state. In the figure, reference numeral 11 b denotes a locking groove formed on the outer peripheral surface of the metal sleeve 11, and this locking groove 11 b prevents the metal tube from being pulled out from the resin sleeve 8. Moreover, although the hollow cylinder 12b is used in a present Example, the cylindrical body which is not hollow may be sufficient as this.
[0012]
Next, a method for attaching the anticorrosion sleeve 6 to the water faucet 3 with saddle and the hole wall 5 of the metal tube 1 will be described. First, the metal sleeve 11 is inserted into the cylindrical body 12b of the mounting tool 12 to which the operation rod 12d is screwed, and the flange portion 11a of the metal sleeve 11 is engaged with the flange portion 12a. A sleeve body 9 having a resin sleeve 8 on the inner diameter side of the rubber sleeve 7 is inserted into the cylinder 12b, and a protrusion 8c formed on the inner peripheral surface of the lower end of the resin sleeve 8 is engaged with the engagement groove 12c of the cylinder 12b. The anticorrosion sleeve 6 is temporarily fixed to the mounting tool 12 with the lower end of the metal sleeve 11 inserted into the opening 10 of the resin sleeve 8. As shown in FIG. 2, the mounting tool 12 is inserted into the water faucet 3 and the water passage 4 of the metal tube 1 so that the rubber sleeve 7 is positioned on the hole wall 5. At this time, the flange portion 8a of the resin sleeve 8 engages with the upper surface of the ridge ring portion 21 formed on the inner peripheral surface of the mounting cap 19 of the water stop mechanism 2 described later.
[0013]
Next, as shown in FIG. 3, the mounting tool 12 is further inserted to insert the metal sleeve 11 into the inner peripheral surface of the sleeve main body 9 and expand the diameter of the resin sleeve 8 as shown in FIG. Further, the mounting tool 12 is inserted to expand the diameter of the rubber sleeve 7 as shown in FIG. 4 so that the rubber sleeve 7 is brought into close contact with the cutting surface of the hole wall 5 of the water passage 4, and the protrusion 8 c of the resin sleeve 8 is formed. Inverted, the lower end portion 7a of the rubber sleeve 7 protrudes outward and engages with the inner end portion of the hole wall 5 of the metal tube 1 to prevent corrosion on the hole wall 5 of the metal tube 1 as shown in FIG. The sleeve 6 is mounted in a sealed state. At this time, the mounting tool 12 can be pulled out from above with the anti-corrosion sleeve 6 mounted, so that it is securely mounted in the state shown in FIG.
[0014]
In FIG. 1, a mortar 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. The water faucet main body 16 is fixed with a bolt (not shown), and the main body 16 incorporates a water stop mechanism 2 in which a ball 2b having a T-shaped through hole 2a is rotatably provided via a stem 2c. ing. The main body 16 is provided with a branch portion 18 having a joint portion 17 for connecting a branch pipe. In the figure, 2d is a pair of ball sheets, and 22 is a gasket.
[0015]
Further, a mounting cap 19 for mounting the water stop mechanism 2 to the water tap body 16 is screwed to the water faucet body 16 via the seat 20 so that the water stop mechanism itself can be adjusted in advance. Yes. Further, a projecting ring portion 21 is provided on the inner peripheral surface of the mounting cap 19, and the projecting ring portion 21 engages the flange portion 8a of the resin sleeve 8 and the flange portion 11a of the metal sleeve 11 and is not perforated. A guide function for guiding the machine and the mounting tool 12 is exhibited.
[0016]
【The invention's effect】
As is clear from the above, the mounting of the anticorrosion sleeve is a mounting process in which only the movement is performed, so that the tool is simplified and the success rate of mounting is extremely high as compared with the conventional example. Further, since the metal sleeve itself is a cylindrical shape that is not deformed before and after mounting, the metal sleeve itself is not only easily manufactured, but also has an effect of being securely mounted without being affected by variations in the drilled holes of the metal tube.
[0017]
In addition, since the resin sleeve is provided inside the rubber sleeve, the rubber and the resin sleeve can be smoothly inserted and expanded, and the resin sleeve can be used to press fit with the tool and be fixed. Therefore, the anticorrosion sleeve is not likely to drop off in the water faucet during the operation, and the anticorrosion sleeve can be provided in which the conventional problems are solved all at once.
[0018]
In addition, since a rigid sleeve such as a metal sleeve uses a material with high rigidity, even when a tensile force from the branching direction due to an earthquake or an external force of movement in the pipe axis direction of the water main is applied, The anti-corrosion sleeve is provided with a shearing force, and there is an excellent effect that has not been achieved so far, such as being able to reliably prevent the deviation of the water faucet.
[Brief description of the drawings]
FIG. 1 is a sectional view of a water faucet with a saddle according to the present invention.
FIG. 2 is an enlarged partial cross-sectional view showing a state where a corrosion prevention sleeve is attached to a metal pipe.
FIG. 3 is an enlarged partial cross-sectional view showing a state where a corrosion prevention sleeve is attached to a metal pipe.
FIG. 4 is an enlarged partial cross-sectional view showing a state in which an anticorrosion sleeve is attached to a metal pipe.
FIG. 5 is an enlarged partial cross-sectional view showing a state where a corrosion prevention sleeve is attached to a metal pipe.
FIG. 6 is an exploded perspective view showing the anticorrosion sleeve and the installation tool separately.
FIG. 7 is an enlarged partial cross-sectional view showing a state where the anticorrosion sleeve is attached to the attachment tool.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Metal pipe 2 Water stop mechanism 3 Water faucet with a saddle 4 Water inlet 5 Hole wall 6 Corrosion prevention sleeve 7 Elastic sleeve 8 Resin sleeve 8a collar part 9 Sleeve body 10 Opening part 11 Metal sleeve 11a collar part 12 Installation tool 12a Flange part 12b Cylinder

Claims (1)

An engagement groove is formed on the outer periphery of the mounting tool having a flange portion at the upper end of the cylinder or cylinder, and a rigid sleeve having a flange portion is inserted from below the mounting tool to engage the flange portion with the flange portion. Further, a sleeve body having a resin sleeve inside the elastic sleeve is inserted into the mounting tool, and a lower end portion of the rigid sleeve is inserted in the vicinity of the opening of the sleeve body, and the sleeve body A projection formed on the inner peripheral surface of the metal sleeve is engaged with the engagement groove, and the engagement tool in this engaged state is inserted into the perforation hole of the metal tube for attachment, and the elastic sleeve side is inserted into the hole of the perforation hole. By placing the mounting tool on the wall and inserting the mounting tool further, the outer peripheral surface of the rigid sleeve is inserted into the inner peripheral surface of the sleeve body with the flange portion engaged with the flange portion, and the resin sleeve side Same as expanding diameter It said mounting method of corrosion protection sleeve, characterized in that said elastic sleeve is expanded to the cutting surface of the hole wall of the drilled hole an elastic sleeve is brought into close contact so as to attach the anticorrosion sleeve perforation holes.

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