JP2010216548A - Corrosion-proof core for snap tap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a corrosion-proof core for a snap tap which can attach while revealing corrosion prevention performance by preventing a holding sleeve from being dropped into a branch hole even if being in such a state of misaligning to the branch hole in the corrosion-proof core which reveals high sealing performance by being attached to the branch hole smoothly while securing a predetermined mounting state. <P>SOLUTION: The corrosion-proof core for the snap tap includes an elastic sleeve 31 which is attached to the branch hole 23 of a pipe arrangement 20 and is attached to the outer peripheral surface 30a of the holding sleeve 30. The corrosion-proof core locates thick-walled annular portion 50 formed to the elastic sleeve 31 on the lower surface 36a of a collar portion 36 provided on the holding sleeve 30 and then brings the thick-walled annular portion 50 into pressure contact with the outer peripheral edge portion 27 of the branch hole 23 and performs sealing. Then, the corrosion-proof core is configured so as to prevent the holding sleeve 30 from being dropped into the branch hole by bringing the outer peripheral surface 51 of the thick-walled annular portion 50 into pressure contact with a vicinity of an inner peripheral end wall 28 of the branch hole 23 when the holding sleeve 30 is in misaligned state to the branch hole 23. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  When installing a water faucet for branching from a pipe such as a water pipe to a branch pipe, the present invention is mounted to prevent corrosion of the cut surface of the hole wall when a metal pipe as a pipe is drilled. The present invention relates to a corrosion prevention core for a faucet.

  Conventionally, as this kind of anti-corrosion core, for example, the faucet close-contact core of Patent Document 1 is known. This close-contact core has a cylindrical main body made of a plastic material such as pure copper or phosphorous deoxidized copper, and the entire outer surface of the cylindrical main body is covered with a coating layer made of an elastic material made of rubber to form a core member. Yes. When the close-contact core is attached to the water main, the core member is forcibly expanded by the insertion rod and is brought into pressure contact with the water main.

  Moreover, for example, a protective sleeve disclosed in Patent Document 2 is disclosed as an anticorrosion core having a structure different from the above. The literature 2 is shown in the schematic cross-sectional view of FIG. In the figure, the protective sleeve 1 is composed of a first sleeve 2 made of hard plastic or metal and a second sleeve 3 made of synthetic rubber or soft resin. When the protective sleeve 1 is mounted, the first sleeve 2 is press-fitted into the second sleeve 3 so that the second sleeve 3 fitted into the perforated portion 5 of the water pipe 4 is crimped to the inner peripheral surface 5a of the perforated portion, At this time, the flange portion 6 of the second sleeve 3 is pressed against the upper surface 4a of the water pipe 4 by the insertion tool 7 so that the inlet side of the perforated portion 5 is sealed.

  On the other hand, the anticorrosion core body 10 in FIG. 14 has a structure having three sleeve bodies including an elastic sleeve body 11, a resin sleeve body 12, and a rigid sleeve body 13. The anticorrosion core body 10 is attached to a pipe portion (water pipe) 15 by inserting a rigid sleeve body 13 into a sleeve body 14 having a resin sleeve body 12 attached to the inner diameter side of the elastic sleeve body 11, and the resin sleeve body. 12 and the elastic sleeve body 11 are expanded in diameter, and the elastic sleeve body 11 is in close contact with the hole wall portion 16 a of the hole 16 of the pipe portion 15. After mounting, the flange portion 12 a of the resin sleeve body 12 is hooked on the hole edge portion 16 b of the perforated hole 16 to seal the entrance portion of the perforated hole 16, and the resin sleeve body 12 is attached to the rigid sleeve body 13. It is prevented from falling to the perforated hole 16 side by pushing.

JP 2006-226490 A JP 9-42567 A

  However, the close contact core of Patent Document 1 has a large resistance for deforming the plastic material when the diameter of the close contact core is expanded, and this plastic material is used to expand the diameter of the plastic material into a perfect circle. The insertion rod is required to have high dimensional accuracy during fitting. In addition, since the plastic material is copper, the rigidity is high, and when the plastic material is deformed, the adhesion of the elastic material to the water main may be lowered and the sealing performance may not be maintained.

  Further, the protective sleeve 1 having a two-layer structure of the first sleeve 2 and the second sleeve 3 shown in FIG. 13 as in Patent Document 2 has a water pipe 4 of the second sleeve 3 by making the first sleeve 2 hard plastic. Although the adhesiveness to can be improved, the following problems have arisen. That is, in the same publication, when synthetic rubber is used as the second sleeve 3, the friction resistance with the first sleeve 2 becomes high and the mounting becomes incomplete, and a soft resin is used as the second sleeve 3. When used, the compression set characteristics were inferior, and the adhesion to the inner peripheral surface 5a of the perforated part was poor.

Further, as shown in FIGS. 13A and 13B, for example, the drilling tool 7 is attached in a rattling state or an oblique state, or other laying pipes such as a gas pipe and a telephone line. In order to avoid interference with the water pipe, if the water faucet is attached to the water pipe at an angle, or if the water faucet is not sufficiently fixed to the water pipe 4, the perforated part 5 is predetermined when drilling. May be drilled out of position. When mounting the protective sleeve 1 against the perforated portion 5, displaced in the axis S ₂ Togahaba h of axis S ₁ and the insertion tool 7 of the drilling unit 5, so-called, it may become misalignment state.
In this case, as shown in FIG. 13 (a), when the second sleeve 3 is temporarily attached with the axial center shifted from the perforated portion 5, and when the first sleeve 2 is inserted into the second sleeve 3, As shown in FIG. 13 (b), when the pressing force is applied to the flange portion 6 on the side where the gap between the second sleeve 3 and the perforated portion 5 is large, that is, the left side in the drawing, the flange portion 6 has low rigidity. As a result, the shoulder may fall into the perforated portion 5 due to deformation. As a result, the second sleeve 3 may fall into the perforated portion 5 so that the entire flange portion 6 is pulled into the perforated portion 5.

  On the other hand, the anticorrosion core body 10 having the structure shown in FIG. 14 has a three-layer sleeve structure including an elastic sleeve body 11, a resin sleeve body 12, and a rigid sleeve body 13. It is possible to complete the mounting by inserting the elastic sleeve body, and the sealing performance is enhanced by the elastic sleeve body 11 being in close contact with the hole wall portion 16a of the hole 16.

  However, when the nominal diameter of the anticorrosion core body 10 is increased to, for example, 40A and 50A and the curvature thereof is increased, the rigidity of the flange-shaped portion 12a of the resin sleeve body 12 is decreased. For this reason, when the axis of the perforated hole 16 is deviated from the axis of the anticorrosion core, the hook-shaped portion 12a is crushed downward, and, as in Patent Document 2, the resin sleeve body 12 At the time of insertion, one side of the hook-shaped portion 12a falls from the hole edge portion 16b of the perforated hole 16, and the skirt portion 12b, which is a mounting portion of the resin sleeve body 12 to the hole wall portion 16a, is a water passage portion of the piping portion 15. There is a possibility that a phenomenon called so-called peep, which jumps out to a certain water flow diameter and remains in the water flow diameter, may occur.

  At this time, the outer diameter of the bowl-shaped portion 12a is smaller than the diameter of the water flow opening 18 of the saddle-equipped water faucet 17, and it is necessary to ensure a predetermined inner diameter. Thereby, as a measure to prevent the sagging, it is conceivable that the outer diameter of the flange-shaped portion 12a is provided in the maximum dimension within a predetermined range and the thickness in the radial direction is increased, but when the thickness in the radial direction is increased. Combined with the fact that the elongate portion of the hook-shaped portion 12a is deteriorated, the diameter of the hook-shaped portion 12a is difficult to expand when the rigid sleeve body 13 is inserted, and the amount of engagement of the hole 16 on the hole edge 16b is reduced. There is a possibility that it will be crushed downward and fall into the perforated hole 16. As described above, the anticorrosion core body 10 may not be correctly mounted if the center diameter is misaligned when the nominal diameter is large, and the corrugated portion 12a at the time of misalignment increases as the nominal diameter increases. The amount of hanging has decreased, making it easier to drop.

  The present invention has been developed to solve the above-described problems, and the object of the present invention is to provide an anticorrosion core that exhibits a high sealing performance by being smoothly mounted in a branch hole while ensuring a predetermined mounting state. Thus, it is an object of the present invention to provide an anticorrosive core for a water faucet that can be mounted while preventing corrosion to the branch hole and exhibiting anticorrosion performance even when it is in an off-center state with respect to the branch hole.

  In order to achieve the above object, an invention according to claim 1 is an anticorrosion core having an elastic sleeve attached to a branch hole of a pipe and attached to an outer peripheral surface of a holding sleeve, and a collar provided on the holding sleeve When the thick annular portion formed on the elastic sleeve is positioned on the lower surface of the elastic sleeve, and the thick annular portion is pressed and sealed to the outer peripheral edge of the branch hole, and the holding sleeve is in an off-center state with respect to the branch hole, The anticorrosion core for a water faucet is configured so that the outer peripheral surface of the thick annular portion is pressed against the vicinity of the inner peripheral upper end wall of the branch hole to prevent the holding sleeve from falling.

  According to a second aspect of the present invention, the holding sleeve includes a rigid sleeve and a resin sleeve mounted on the outer peripheral surface of the rigid sleeve, and the elastic sleeve is positioned on the lower surface of the collar portion formed on the resin sleeve. It is the made anticorrosion core for water faucets.

  The invention according to claim 3 is the anticorrosion core for a water faucet, wherein the elastic sleeve is a rubber sleeve.

  The invention which concerns on Claim 4 is the anticorrosion core for water faucets which provided the angle of the lower end surface of the thick annular part at 90 degrees or less with respect to the outer peripheral surface.

  The invention which concerns on Claim 5 is the anticorrosion core for water faucets which provided the corner | angular part in the boundary of a lower end surface and an outer peripheral surface.

  According to the first aspect of the present invention, the elastic sleeve is expanded by the holding sleeve, and the anticorrosion core can be smoothly attached to the branch hole and exhibit high sealing performance while ensuring a predetermined mounting state. Can be mounted while preventing leakage by sealing the lower end surface of the thick annular portion with the outer peripheral edge of the branch hole. On the other hand, when the branch hole is in the misalignment state, sliding resistance is generated between the outer peripheral surface of the thick annular portion and the inner peripheral upper end edge of the branch hole, so that the holding sleeve is prevented from falling into the branch hole. be able to. In this way, it is possible to provide a corrosion prevention core for a water faucet that can be mounted while exhibiting anticorrosion performance regardless of the drilling position of the perforated hole.

  According to the invention which concerns on Claim 2, it is a corrosion prevention core which can be smoothly inserted with respect to the branch hole of piping, and can complete mounting | wearing, preventing the drop-off | omission in operation | work. Further, it can be mounted while exerting a high sealing performance by being brought into close contact with a predetermined position of the branch hole with almost no influence of variations in the perforated state of the branch hole.

  According to the invention of claim 3, since it can be installed while preventing leakage at the insertion portion with the branch hole, and the shape of the existing rubber sleeve is only slightly changed, it can be easily molded and the processing equipment can be changed. Can be minimized. Moreover, since the number of parts does not increase, assembly during manufacture is easy.

  According to the invention which concerns on Claim 4, it is an anticorrosion core which becomes easy for an elastic sleeve to catch on a branch hole at the time of mounting | wearing, and can prevent the fall from a branch hole also at the time of misalignment.

  According to the invention of claim 5, the elastic sleeve is difficult to be pulled in from the edge of the branch hole at the time of mounting, and particularly when the core is misaligned, a strong sliding resistance is generated on the outer peripheral surface of the thick annular portion. Since the annular portion can be secured in the vicinity of the inner peripheral upper end wall of the branch hole, the elastic sleeve can be prevented from falling from the branch hole.

It is sectional drawing which shows the state which mounts the water faucet anticorrosion core of this invention. It is a semi-cross-sectional view of the water faucet anticorrosive core of the present invention. It is sectional drawing which shows the state which mounted | wore the mounting tool with the water-proof faucet anticorrosion core of FIG. It is principal part sectional drawing which shows the state which inserted the mounting tool of FIG. It is principal part sectional drawing which shows the state which inserted the mounting tool of FIG. It is principal part sectional drawing which shows the state which inserted the mounting tool of FIG. It is principal part sectional drawing which shows the state which inserted the mounting tool of FIG. It is principal part sectional drawing which shows the state after mounting | wearing with the anticorrosion core. It is principal part sectional drawing which shows the state which mounts the water faucet anti-corrosion core in a misalignment state. It is principal part sectional drawing which shows the state which inserted the mounting tool after mounting | wearing with the anticorrosion core of FIG. It is principal part sectional drawing which shows the state which removed the mounting tool of FIG. It is the schematic perspective view which showed the branch hole vicinity of piping. It is sectional drawing which showed the state which mounts the conventional protective sleeve. (A) is a schematic sectional drawing which shows the state before insertion of a 1st sleeve. (B) is a schematic sectional drawing which shows the state which inserts a 1st sleeve. It is the schematic sectional drawing which showed the state which mounts the conventional anti-corrosion core body.

  Below, preferable embodiment of the water faucet anticorrosion core in this invention is described based on drawing. FIG. 1 shows a state where the water faucet anticorrosive core of the present invention is attached to a water pipe (pipe) 20 such as a cast iron pipe, and FIG. 2 shows the whole of the water faucet anticorrosive core of the present invention. Is shown. In FIG. 1, a pipe 20 is provided with a saddle-equipped water faucet (hereinafter referred to as a water faucet) 22 having a water stop mechanism 21 for branching a branch pipe (not shown). After the branch hole 23 serving as a water passage is drilled by the drilling tool, the core body 25 is mounted on the branch hole 23 by the mounting tool 24 to prevent the cutting surface 26 of the branch hole 23 from being corroded.

  1 and 2, the core body 25 includes a substantially cylindrical holding sleeve 30 and an elastic sleeve 31, and the elastic sleeve 31 is attached to the outer peripheral surface 30 a of the holding sleeve 30. Further, the holding sleeve 30 includes a rigid sleeve 33 and a resin sleeve 34, and the resin sleeve 34 is attached to the outer peripheral surface 33 a of the rigid sleeve 33.

  As shown in FIGS. 2 and 3, in the holding sleeve 30, the resin sleeve 34 has a mounting portion 35 mounted in the branch hole 23 of the pipe 20, and a diameter larger than that of the mounting portion 35 above the mounting portion 35. And a hook-like flange 36. The outer diameter of the collar portion 36 is formed to be slightly smaller than the inner diameter of the water stop mechanism 21 of the water faucet 22. Further, an annular concave groove 37 into which the elastic sleeve 31 can be mounted is formed on the outer peripheral side of the mounting portion 35, while a taper step portion 38 and a locking projection 39 are formed on the inner peripheral side of the flange portion 36. Is formed. The resin sleeve 34 is formed of, for example, a resin such as low-density polyethylene having good sliding characteristics and high elongation characteristics. In this case, the rigid sleeve 33 can be easily inserted on the inner diameter side due to the good sliding characteristics. In addition, since the elongation characteristic is increased, the diameter can be expanded without causing cracks.

  The rigid sleeve 33 has a small diameter portion 40, a tapered portion 41, and a large diameter portion 42 in order from the insertion side, and the tapered portion 41 is provided between the small diameter portion 40 and the large diameter portion 42. Yes. With this shape, the rigid sleeve 33 can expand the diameter of the resin sleeve 34 in two stages. Further, a locking groove 43 is formed in the small diameter portion 40, and a locking projection 39 of the resin sleeve 34 can be locked in the locking groove 43. Further, a flange portion 44 is formed on the opening end side of the large diameter portion 42, and the flange portion 44 abuts against the pressing portion 63 of the mounting tool and can be inserted into the resin sleeve 34. The rigid sleeve 33 is made of a metal such as stainless steel, for example.

  On the other hand, the elastic sleeve 31 is made of a rubber sleeve, and has a skirt portion 49 and a thick annular portion 50. The elastic sleeve 31 has the thick annular portion 50 of the flange portion 36 of the resin sleeve 34 described above. The annular groove 37 is mounted on the lower surface 36a. The thick annular portion 50 has a shape having an outer peripheral surface 51, a lower end surface 52, and an upper end surface 53. The outer peripheral surface 51 is formed in parallel with the insertion direction of the elastic sleeve 31, and the angle θ of the lower end surface 52 with respect to the outer peripheral surface 51 is provided at 90 ° or less and 80 ° or more (90 ° in this embodiment). ing. Further, a corner 54 is provided at the boundary between the lower end surface 52 and the outer peripheral surface 51.

  The thick annular portion 50 is preferably formed integrally with the skirt portion 49 as in the present embodiment in terms of molding of the elastic sleeve 31 and mounting to the resin sleeve 34, but may be formed separately. it can. Further, the outer diameter of the thick annular portion 50 is substantially the same as or slightly larger than the outer diameter (not shown) of the flange portion 36 of the resin sleeve 34. In the present embodiment, the outer diameter is the same or the same diameter. To 0.4 mm in diameter (one side increases by 0.2 mm).

The reason for this is that if the thick annular portion 50 is smaller than the outer diameter of the collar portion, the amount of compression of the thick annular portion 50 becomes small and prevents falling when the holding sleeve 30 and the branch hole 23 described later are misaligned. If the function is difficult to work and the outer diameter of the thick annular portion 50 is too large, the thick annular portion 50 will be diverted when passing through the interior of the water faucet 22 during the insertion process of the core body 25 described later. This is because problems such as turning up or cutting in contact with the water stop mechanism 21 of the stopper 22, or starting diameter expansion by the water stop mechanism 21 of the water stopper 22 before reaching the branch hole 23 occur. .
Also, thick annular part 50 is desirably the thickness t ₁ in the radial direction is 3-5 times the thickness t ₂ of the skirt portion 49, a strong rigidity is exhibited in this case.

  In the above-described embodiment, when the thickness of the thick annular portion 50 is thin, for example, approximately equal to the thickness of the skirt portion 49, the contact area between the thick annular portion 50 and the cutting surface 26 is small. Since it becomes small, the sliding resistance after the thick annular part 50 falls into the branch hole 23 becomes small. For this reason, the resin sleeve 34 may not be prevented from falling. Therefore, it is necessary to provide the thick annular portion 50 at the aforementioned thickness that can exhibit an appropriate sliding resistance.

In the anticorrosion core of the present invention, when the core body 25 is mounted on the branch hole 23 by the mounting tool 24, the thick annular portion 50 is pressed and sealed to the outer peripheral edge portion 27 of the branch hole 22. At this time, the skirt portion 49 is sandwiched between the branch hole 23 and the resin sleeve 34 and is pressed and sealed to the cutting surface 26 of the branch hole 23.
Further, when the core body 25 is mounted, the branch hole 23 is not perforated at a normal position and is in a position shifted from the axis of the water faucet 22, that is, the holding sleeve 30 is centered with respect to the branch hole 23. When in the shifted state, the outer peripheral surface 51 of the thick annular portion 50 is pressed against the vicinity of the inner peripheral upper end wall 28 of the branch hole 23 to prevent the holding sleeve 30 from falling.

  On the other hand, although the above-mentioned piping 20 is formed of a single material in the present embodiment, an appropriate lining layer such as a mortar lining layer or a resin lining layer may be provided on the inner peripheral surface side. As shown in FIG. 1, the water faucet 22 includes a branch portion 22 b provided with a joint portion 22 a for connecting a branch pipe, and the water stop mechanism 21 for performing a branch pipe from the pipe 20 to the branch pipe. Have. The water stop mechanism 21 includes a ball valve body 45, a stem 46, a ball seat 47, and a gasket 48. The ball valve body 45 has a substantially T-shaped through hole 45 a inside, and a stem 46 is connected to the ball valve body 45. The ball seat 47 is disposed on both sides of the ball valve body 45 and holds the ball valve body 45 in a sealed state. The gasket 48 is mounted between the saddle 22c constituting the water faucet 22 and the pipe 20, and seals them.

  The mounting tool 24 to which the core body 25 shown in FIGS. 1 and 3 is mounted has a projecting locking portion 60, a first taper portion 61, a second taper portion 62, and a pressing portion 63 from the tip side. Yes. The projecting locking portion 60 is for temporarily fixing the core body 25 by locking the claw portion 64 formed on the front end side of the resin sleeve 34 when the temporarily assembled core body 25 is attached. The first taper portion 61 and the second taper portion 62 function so that the resin sleeve 34 can be expanded in diameter from the flange portion 36 to the tip so that the insertion by the rigid sleeve 33 can be performed smoothly. Further, the pressing portion 63 is formed to project in an annular shape at the rear of the pressing portion 63 so as to abut against the flange portion 44 of the rigid sleeve 33 when the mounting tool 24 is inserted so that the flange portion 44 can be pressed. Further, an operating rod 65 is attached to the upper portion of the mounting tool 24 by screwing, and the mounting tool 24 can be operated by the operating rod 65.

Then, the procedure in the case of temporarily assembling the above-described anticorrosion core will be described.
When the core body 25 is temporarily assembled, first, the rigid sleeve 33 is inserted from the opening 34 a of the resin sleeve 34 to which the elastic sleeve 31 is mounted, and the distal end side of the rigid sleeve 33 is brought into contact with the taper step portion 38 of the resin sleeve 34. Make contact. At this time, the locking protrusion 39 of the resin sleeve 34 is simultaneously locked and temporarily assembled in the locking groove 43 of the rigid sleeve 33. At that time, since the outer peripheral side of the small-diameter portion 40 of the rigid sleeve 33 is held so as to be in surface contact over substantially the entire inner periphery of the flange 36, the resin sleeve 34 and the rigid sleeve 33 are reliably concentric. The rigid sleeve 33 is temporarily attached in a state in which the rigid sleeve 33 is smoothly inserted. In this case, the temporary assembly of the resin sleeve 34 and the rigid sleeve 33 is easy because the tip (lower end) of the rigid sleeve 33 is simply pushed from the upper end side of the resin sleeve 34.
Thus, the resin sleeve 34 and the rigid sleeve 33 are integrated to provide the holding sleeve 30, and the core body 25 is configured by the holding sleeve 30 and the elastic sleeve 31.

  Subsequently, the core body 25 that has been temporarily assembled is temporarily fixed to the mounting tool 24 to which the operation rod 65 is screwed. When the core body 25 is attached from the lower side of the mounting tool 24, the claw portion 64 of the resin sleeve 34 is locked to the projecting locking portion 60, thereby preventing the core body 25 from falling off from the mounting tool 24. The core body 25 is kept horizontal. The mounting tool 24 is attached to the water faucet 22 via the attachment adapter 66 with the core main body 25 temporarily attached. At this time, the core main body 25 is disposed at the mounting position of the branch hole 23.

  Next, the installation procedure and operation when the anticorrosion core for a water faucet of the above embodiment of the present invention is attached to a water faucet / pipe will be described. In FIG. 3, the state which mounted | wore the mounting tool 24 with the anticorrosion core for water faucets of this invention is shown. When the core body 25 is mounted on the mounting tool 24, the claw portion 64 at the tip of the resin sleeve 34 is locked to the protruding locking portion 60 using the elasticity of the resin, and can be attached with one touch.

  When the core body 25 is mounted in the branch hole 23, first, the process of mounting the core body 25 when the holding sleeve 30 (water faucet 22) and the branch hole 23 are in the concentric state will be described. In FIG. 1, when a handle (not shown) is turned and the operation rod 65 of the mounting tool 24 is inserted into the branch hole 23 provided in the pipe 20, the lower surface side of the flange portion 36 of the resin sleeve 34 is seated on the outer peripheral edge portion 27 of the branch hole 23. To do. At this time, the base portion of the flange portion 36 is set to have substantially the same diameter as the inner diameter of the branch hole 23, so that the lower end surface of the flange portion 36 is engaged with the outer peripheral edge portion 27.

  When the mounting tool 24 is continuously inserted from this state, as shown in FIG. 4, the engagement state between the protruding locking portion 60 of the mounting tool 24 and the claw portion 64 of the resin sleeve 34 is released, and the mounting tool 24 The pressing portion 63 abuts on the flange portion 44 of the rigid sleeve 33. From this stage, the insertion of the rigid sleeve 33 into the resin sleeve 34 starts.

  When the mounting tool 24 is further inserted, the temporary assembly of the resin sleeve 34 and the rigid sleeve 33 is released, the small diameter portion 40 of the rigid sleeve 33 expands the mounting portion 35 of the resin sleeve 34, and the diameter of the mounting portion 35 increases. Accordingly, in FIG. 5, the elastic sleeve 33 starts to cover the cutting surface 26 of the branch hole 23. At this time, the thick annular portion 50 is pressed by the flange portion 36 in a state of being located outside the outer peripheral edge portion 27 of the branch hole 23, so that the outer peripheral edge portion 27 is tightly sealed to prevent corrosion.

  In FIG. 6, when the mounting tool 24 is continuously inserted, the large diameter portion 42 expands the flange portion 36 while the small diameter portion 40 of the rigid sleeve 33 continues to expand the mounting portion. Then, as shown in FIG. 7, the mounting of the core body 25 is completed when the flange portion 44 of the rigid sleeve 33 comes into contact with the upper end surface 36 b of the flange portion 36. At that time, since the insertion torque of the mounting tool 24 becomes heavy, the operator can feel the completion of the insertion with a quick response.

  Next, as shown in FIG. 8, the operator pulls up the mounting tool 24, closes the water tap 22, removes the mounting tool 24, and completes the work. As described above, when the elastic sleeve 31 is mounted in a state where the thick annular portion 50 is pressed and sealed to the outer peripheral edge portion 27 of the branch hole 23, the outer peripheral surface 49 a of the skirt portion 49 is tightly sealed to the branch hole cutting surface 26. In addition, since the collar portion 36 is in close contact with the inner diameter of the water faucet 22, it becomes possible to continue exhibiting anticorrosion performance for a long period of time.

Next, the case where the holding sleeve 30 (water faucet 22) and the branch hole 23 are in the misalignment state will be described. In FIG. 9, the central axis O ₂ of the branch hole 23 is shifted at a distance w with respect to the central axis O ₁ of the water faucet 22 and the mounting tool 24.
When the operating rod 65 of the mounting tool 24 is inserted into the branch hole 23, the core body 25 lowered by the mounting tool 24 is seated on the outer peripheral edge portion 27 of the branch hole 23. At this time, since the branch hole 23 is in a misalignment state, the thick annular portion 50 is hooked on the outer peripheral edge portion 27 of the branch hole 23 on one side of the branch hole 23 (for example, the right side of the branch hole 23 in FIG. 9). In addition, the thick annular portion 50 is not hung on the outer peripheral edge 27 on the other side (for example, the left side of the branch hole 23 in FIG. 9).

  However, in this case, as shown in FIG. 12, the outer peripheral edge 27 is formed on the circular arc surface of the pipe 20, so that the thick annular portion 50 is easily in contact with the point P at the top of the pipe 20. The thick annular portion 50 is difficult to contact at the point Q at a position 90 ° from the top of the tube. And in the section from this point P to the point Q, the outer periphery of the pipe 20 is a gently curved surface, so that the thick annular portion 50 is gradually separated from the state of hanging on the outer peripheral edge portion 27. Yes. Therefore, even if the branch hole 23 is in the misalignment state, the entire thick annular portion 50 on the side that does not hook the outer peripheral edge 27 does not float from the outer peripheral edge 27. For convenience, the positions of the points P and Q are also shown in FIG. Moreover, in FIG. 1, the thickness annular part 50 has shown the state which contact | connected to the point Q on description of the water faucet with a saddle, and it shows in figure similarly in FIGS. 9 and 10 show a state where the thick annular portion 50 is in contact with the point P. FIG.

  FIG. 10 shows a state where the mounting tool 24 is lowered from the state of FIG. 9, the rigid sleeve 33 is inserted into the resin sleeve 34, and the flange portion 36 is expanded by the large diameter portion 42 of the rigid sleeve 33. In this case, the thick annular portion 50 on the side of the outer peripheral edge portion 27 is compressed downward by the insertion of the rigid sleeve 33, and the thick annular portion 50 and the flange portion 36 with respect to the outer peripheral edge portion 27. The bottom surface 36a is firmly attached. Thereby, the lower end surface 52 of the thick annular portion 50 protects the outer peripheral edge portion 27 from corrosion. On the other hand, the thick annular portion 50 on the side not hanging on the outer peripheral edge portion 27 is slightly depressed by the insertion of the rigid sleeve 33, and the small diameter portion 40 of the rigid sleeve 33 expands the mounting portion 35. Sometimes, the thick annular portion 50 is compressed between the cutting surface 26 of the branch hole 23 and the mounting portion 35, and the outer peripheral surface 51 of the thick annular portion 50 is near the inner peripheral upper end wall 28 of the branch hole 23. It will be in the state of pressure contact. As a result, the sliding resistance of the contact portion is increased, and a so-called brake (anti-slip) effect that prevents the thick annular portion 50 from falling from the branch hole 23 is exhibited.

  Furthermore, when the insertion of the mounting tool 24 is further continued from this state, the core body 25 can be inserted into the branch hole 23 in the misalignment state while preventing the collar portion 36 from falling, and the holding sleeve 30 and the branch hole 23 described above can be inserted. Since the insertion torque of the mounting tool 24 becomes heavy when the flange portion 44 of the rigid sleeve 33 comes into contact with the flange portion 36 as in the case of the concentric cores, the operator can complete the insertion with the insertion torque. It becomes possible to feel more than the increase. Subsequently, as shown in FIG. 11, the operator pulls up the mounting tool 24, closes the water faucet 22, and removes the mounting tool 24 to complete the mounting operation of the core body 25.

  In this case, in FIG. 11, in the portion where the thick annular portion 50 is not hung on the outer peripheral edge portion 27, that is, in the vicinity of the left side of the outer peripheral edge portion 27 in the figure, the thick annular portion 50 is cut as described above. In this portion, the thick annular portion 50 is compressed, and the cutting surface 26 is tightly sealed to continue to exhibit the anticorrosion function for a long time. It becomes possible.

  Further, when the angle θ of the lower end surface 52 of the thick annular portion 50 is larger than 90 ° with respect to the outer peripheral surface 51, and there is no horizontal portion on the lower end surface 52, when a pressing force is applied from above, Due to the inclination angle, the thick annular portion 50 is easily depressed due to a force applied to the branch hole 23. Therefore, as described above, the angle θ of the lower end surface 52 is desirably 90 ° or less with respect to the outer peripheral surface 51. In this case, for example, the shape in which the inner diameter side of the lower end surface 52 is hollowed out by reducing the angle θ. Even if it becomes, it can exhibit the function similar to the case of 90 degrees.

  On the other hand, even when a rounded surface or a C surface is formed at the boundary between the lower end surface 52 and the outer peripheral surface 51, the thick annular portion is likely to drop in the same manner as described above. For this reason, it is desirable that the lower end surface 52 and the outer peripheral surface 51 be formed as sharp as possible.

  Moreover, when the thick annular part 50 is extended to the outer peripheral surface side of the collar part 36, for example, when it is extended to the upper outer peripheral surface of the collar part 36, the thick annular part is extended. Therefore, there is a possibility that the inner diameter of the flange portion 36 is reduced, the strength is lowered, and falls into the branch hole. For this reason, the thick annular portion 50 has a substantially rectangular cross section having an outer peripheral surface 51, a lower end surface 52, and an upper end surface 53, and is mounted in a state where the upper end surface 53 is disposed on the lower surface 36 a of the flange portion 36. It is preferred that

  In addition, embodiment mentioned above is an example of the anti-corrosion core for water faucets in this invention to the last, and the anti-corrosion core of this invention can be provided in various forms other than the said embodiment.

20 piping 23 branch hole 25 core main body 27 outer peripheral edge 28 inner peripheral upper end wall 30 holding sleeve 30a outer peripheral surface 31 elastic sleeve 33 rigid sleeve 33a outer peripheral surface 34 resin sleeve 36 flange 36a lower surface 50 thick annular portion 51 outer peripheral surface 52 lower End face 54 Corner θ angle

Claims (5)

  An anticorrosion core having an elastic sleeve attached to the branch hole of the pipe and attached to the outer peripheral surface of the holding sleeve, wherein a thick annular portion formed on the elastic sleeve is formed on the lower surface of the flange provided on the holding sleeve. The thick annular portion is pressed and sealed to the outer peripheral edge of the branch hole, and the outer peripheral surface of the thick annular portion is positioned when the holding sleeve is misaligned with respect to the branch hole. An anticorrosion core for a water faucet, wherein the retaining sleeve is prevented from falling by being pressed against the vicinity of the inner peripheral upper end wall of the branch hole.   The holding sleeve includes a rigid sleeve and a resin sleeve mounted on an outer peripheral surface of the rigid sleeve, and a thick annular portion of the elastic sleeve is positioned on a lower surface of a collar portion formed on the resin sleeve. The anticorrosion core for water faucets as described in 1.   The anticorrosion core for a water faucet according to claim 1 or 2, wherein the elastic sleeve is a rubber sleeve.   The anticorrosion core for a water faucet according to any one of claims 1 to 3, wherein an angle of a lower end surface of the thick annular portion is provided to be 90 ° or less with respect to the outer peripheral surface.   The anticorrosion core for water faucets of any one of Claims 1 thru | or 4 which provided the corner | angular part in the boundary of the said lower end surface and an outer peripheral surface.

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