JP7129078B2 - Installation jig for water pipe anti-corrosion kit and anti-corrosion sleeve - Google Patents

Description

Article 30, Paragraph 2 of the Patent Act is applied.

TECHNICAL FIELD The present invention relates to a water pipe anti-corrosion kit, an anti-corrosion sleeve, and an installation jig for the anti-corrosion sleeve, which are used in the construction of branching water pipes.

Conventionally, there is an anti-corrosion sleeve described in Patent Document 1, for example. This anti-corrosion sleeve exposes the metal that constitutes the water pipe in the hole that is formed (perforated) through the water pipe while water is flowing, when performing work to branch the water pipe, such as by installing a water distribution valve in the water pipe. In order to prevent corrosion of the inner peripheral surface of the steel plate, it is inserted into the hole and attached. The anti-corrosion sleeve described in Patent Document 1 has a form in which a cylindrical resin sleeve is provided on the outer periphery of a cylindrical metal sleeve. By inserting the anti-corrosion sleeve of this form into the hole, corrosion can be prevented by bringing the outer peripheral surface of the resin sleeve into close contact with the inner peripheral surface of the hole.

The anti-corrosion sleeve is configured to be fixed to the hole by press-fitting the metal sleeve into the resin sleeve in the insertion direction. For this reason, the anti-corrosion sleeve has an asymmetrical shape with respect to the insertion direction. When attaching to the water pipe, the anti-corrosion sleeve is set at the tip of the attachment jig, and the anti-corrosion sleeve can be attached to the water pipe by hammering or screwing the attachment jig in this state into the water pipe.

Japanese Patent Application Laid-Open No. 2001-304487

However, in the anti-corrosion sleeve described in Patent Document 1, since the inner diameter dimension of the metal sleeve is the same on one side and the other side in the insertion direction, it is also possible to attach the anti-corrosion sleeve to the mounting jig in the opposite direction. rice field. For this reason, there is a possibility that the operator may erroneously attach the connector to the water pipe as a result of performing the attachment work without noticing the mistake. If a mounting error occurs, the outer peripheral surface of the resin sleeve will not be in close contact with the inner peripheral surface of the hole, so that the hole cannot be protected against corrosion. Since it has to be removed from the water pipe, there is a possibility that the operator will be forced to do a lot of work.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a water pipe anti-corrosion kit, an anti-corrosion sleeve, and an installation jig for the anti-corrosion sleeve, which can suppress erroneous attachment to the water pipe.

The present invention provides a cylindrical anti-corrosion sleeve that is inserted into a hole formed through a water pipe to prevent corrosion of the inner peripheral surface of the hole, and the anti-corrosion sleeve is used for inserting the anti-corrosion sleeve into the hole. a mounting jig, wherein the anti-corrosion sleeve has an engaging portion on the inner peripheral portion of the tip in the direction of insertion into the hole, and the mounting jig includes an insertion shaft portion to be inserted into the anti-corrosion sleeve. , the outer peripheral portion of the insertion shaft portion is provided with an engaged portion with which the engaging portion of the inserted anti-corrosion sleeve is engaged, and the engaging portion has a tip surface at the tip in the insertion direction. When the insertion shaft portion is inserted into the anti-corrosion sleeve from the tip end side in the insertion direction, the engaged portion contacts the tip end surface of the engaging portion. It is a water pipe anti-corrosion kit having a regulation surface that regulates the insertion of a water pipe.

Further, according to the present invention, a water pipe is installed by using a mounting jig having an insertion shaft portion that can be inserted into a cylindrical anti-corrosion sleeve, the insertion shaft portion having an engaged portion having a restricting surface on the outer peripheral portion. A corrosion protection sleeve that is inserted into a hole formed through the hole and attached to prevent corrosion of the inner peripheral surface of the hole, wherein the engaged portion is provided on the inner peripheral portion of the tip in the direction of insertion into the hole and the engaging portion abuts against the restricting surface when the insertion shaft portion of the mounting jig is inserted from the distal end side in the insertion direction to the distal end in the insertion direction. A corrosion protection sleeve with abutting tip surfaces.

Further, the present invention provides a cylindrical anti-corrosion sleeve provided on the inner peripheral portion of the tip in the direction of insertion into a hole formed through a water pipe and provided with an engaging portion having a tip surface at the tip in the direction of insertion, A mounting jig for a corrosion protection sleeve to be inserted into the hole for mounting, comprising an insertion shaft part that can be inserted into the corrosion protection sleeve, the insertion shaft part being engaged with an engaging part of the inserted corrosion protection sleeve. An engaged portion that engages is provided on the outer peripheral portion, and the engaged portion corresponds to the tip end of the corrosion protection sleeve when the insertion shaft portion is inserted into the corrosion protection sleeve from the tip end side in the insertion direction. The mounting jig for the anti-corrosion sleeve is provided with a regulating surface for regulating insertion after this abutment by coming into contact with the surface.

According to each of the above configurations, when the anticorrosive sleeve is set in the mounting jig in a direction opposite to the insertion direction, that is, when the insertion shaft portion is inserted into the anticorrosive sleeve from the distal end side, the distal end surface of the anticorrosive sleeve is aligned with the insertion shaft. Since it abuts on the restricting surface of the part, further insertion is restricted. Therefore, the operator can surely recognize that the anti-corrosion sleeve is attached to the attachment jig in the opposite direction.

Further, the engaged portion may be provided at a distal end side portion of the insertion shaft portion in the insertion direction.

According to the above configuration, the insertion of the insertion shaft into the anti-corrosion sleeve in the opposite direction is restricted at the initial stage of insertion by the distal end portion of the insertion shaft. Therefore, the operator can quickly and reliably recognize that the anti-corrosion sleeve is attached to the attachment jig in the opposite direction to the original orientation.

Further, the insertion shaft portion includes a large diameter portion having a larger diameter than the inner diameter of the engaging portion, and a distal end side of the large diameter portion in the insertion direction, and having a larger diameter than the large diameter portion. and a small diameter portion, wherein the large diameter portion and the small diameter portion are continuous via a stepped portion, the engaged portion includes the small diameter portion, and the restricting surface includes the stepped portion. and can be a surface facing the distal side in the insertion direction.

According to the above configuration, when the insertion shaft portion is inserted into the anticorrosion sleeve facing in the opposite direction, when the engaging portion is fitted into the small diameter portion, the tip surface of the anticorrosion sleeve comes into contact with the restricting surface of the insertion shaft portion. , the regulation of insertion is effectively made.

According to the present invention, the operator can surely recognize that the anti-corrosion sleeve is attached to the attachment jig in the opposite direction. For this reason, it is possible to effectively suppress erroneous attachment to the water pipe.

1 is a longitudinal half-sectional view in a side view showing an anti-corrosion sleeve that constitutes a water pipe anti-corrosion kit according to an embodiment of the present invention; FIG. Fig. 3 is a longitudinal half-sectional view in a side view showing a mounting jig that constitutes the water pipe anticorrosion kit; It is the figure which expanded and showed the lower part in FIG. FIG. 4 is a vertical cross-sectional view showing a state in which the anticorrosion sleeve is correctly inserted into the mounting jig in the water pipe anticorrosion kit. FIG. 4 is a vertical cross-sectional view showing a state in which an anticorrosion sleeve is erroneously inserted into a mounting jig in the water pipe anticorrosion kit. FIG. 4 is a cross-sectional view for explaining how to attach the anticorrosive sleeve to the water pipe to which the saddle water tap is attached. FIG. 4 is a cross-sectional view for explaining how to attach the anticorrosive sleeve to the water pipe to which the saddle water tap is attached. FIG. 4 is a cross-sectional view for explaining how to attach the anticorrosive sleeve to the water pipe to which the saddle water tap is attached. FIG. 4 is a cross-sectional view for explaining how to attach the anticorrosive sleeve to the water pipe to which the saddle water tap is attached. Fig. 3 is a vertical cross-sectional view showing a water pipe anti-corrosion kit according to another embodiment of the present invention, (A) showing a state in which the anti-corrosion sleeve is correctly inserted into the mounting jig, and (B) showing the anti-corrosion sleeve in the mounting jig. indicates that you have inserted the . Fig. 3 is a vertical cross-sectional view showing a water pipe anti-corrosion kit according to another embodiment of the present invention, (A) showing a state in which the anti-corrosion sleeve is correctly inserted into the mounting jig, and (B) showing the anti-corrosion sleeve in the mounting jig. indicates that you have inserted the . Fig. 3 is a vertical cross-sectional view showing a water pipe anti-corrosion kit according to another embodiment of the present invention, (A) showing a state in which the anti-corrosion sleeve is correctly inserted into the mounting jig, and (B) showing the anti-corrosion sleeve in the mounting jig. indicates that you have inserted the .

First, a water pipe anti-corrosion kit 1 according to the present invention will be described by taking up one embodiment. In addition, the vertical direction in the following description corresponds to the vertical direction shown in each drawing.

A water pipe anti-corrosion kit 1 of this embodiment is constructed by combining a cylindrical anti-corrosion sleeve 2 shown in FIG. 1 and a mounting jig 3 shown in FIG. The anti-corrosion sleeve 2 is inserted into and attached to the hole H in order to prevent the inner peripheral surface of the hole H from being corroded, for example, when the water pipe P is passed through and the hole H is formed (drilled). The direction of insertion of the anti-corrosion sleeve 2 into the water pipe P is from above to below. Hereinafter, the expression "insertion direction" is based on this insertion direction. The mounting jig 3 is used to assist in inserting the anti-corrosion sleeve 2 into the hole H of the water pipe P. As shown in FIG.

The anti-corrosion sleeve 2 is composed of a resin sleeve 2A and a metal sleeve 2B. Each of the sleeves 2A and 2B is a cylindrical body, and in a single state before being attached to the water pipe P as shown in FIG. It is Therefore, the anti-corrosion sleeve 2 has a metal sleeve 2B at the top and a resin sleeve 2A at the bottom. In this embodiment, the resin sleeve 2A is made of polyethylene resin, and the metal sleeve 2B is made of stainless steel. However, the material of each sleeve 2A, 2B is not limited to this, and can be changed variously.

An outer stepped portion 21 is formed on the inner peripheral portion of the resin sleeve 2A. On the other hand, an inner stepped portion 22 is formed on the outer peripheral portion of the metal sleeve 2B. In the state shown in FIG. 1 in which the resin sleeve 2A and the metal sleeve 2B are combined, the outer stepped portion 21 of the resin sleeve 2A and the inner stepped portion 22 of the metal sleeve 2B are engaged. This engagement can prevent the metal sleeve 2B from being accidentally pushed into the resin sleeve 2A before the anticorrosion sleeve 2 is attached to the mounting jig 3 . Therefore, the shape of the anti-corrosion sleeve 2 can be maintained.

As shown in FIG. 1, the resin sleeve 2A has a tapered shape in which the outer diameter and inner diameter are reduced at the lower portion. An engaging portion 23 is provided at the inner peripheral portion of the lower end of the resin sleeve 2A. Since the engaging portion 23 has a shape with a reduced inner diameter, it can also be said that the engaging portion 23 is a ridge formed on the inner peripheral portion of the resin sleeve 2A. The engaging portion 23 is a portion that engages with a concave groove 33 as an engaged portion in the insertion shaft portion 32 of the mounting jig 3 . The engaging portion 23 has a tip surface 231 at its lower end. The tip surface 231 of this embodiment is a horizontal surface. This tip end surface 231 is a portion that functions to prevent the insertion of the anticorrosive sleeve 2 into the mounting jig 3 when it is mistakenly inserted into the mounting jig 3 in reverse.

The inner surface of the lower portion of the resin sleeve 2A forms an inclined surface 24. As shown in FIG. This inclined surface 24 is a surface having a large diameter at the top and a small diameter at the bottom. Therefore, when inserting the anti-corrosion sleeve 2 into the mounting jig 3 in the correct direction, it is possible to insert it smoothly without being caught (see FIG. 4). Also, when removing the anti-corrosion sleeve 2 from the erroneously inserted state shown in FIG. there is

The mounting jig 3 is attached to the tip of a shaft (partially shown in FIGS. 6 to 9) of an insertion machine M capable of disposing the anticorrosion sleeve 2 at a position away from the operator. This attachment is made by screwing in this embodiment. For this reason, the mounting jig 3 has a screw shaft 31 on the top. Further, the mounting jig 3 has an insertion shaft portion 32 to be inserted into the anti-corrosion sleeve 2 at its lower portion. The insertion shaft portion 32 is substantially cylindrical. A tapered portion 324 having a reduced diameter is formed at the lower end portion of the insertion shaft portion 32 . This tapered portion 324 facilitates the insertion of the anti-corrosion sleeve 2 into the insertion shaft portion 32 .

A recessed groove 33 that is recessed radially inward from the outer peripheral surface is formed in the lower end portion of the outer peripheral portion of the insertion shaft portion 32 . This concave groove 33 is formed (continuously) over the entire periphery of the insertion shaft portion 32 . As a result, the insertion shaft portion 32 is provided with a large diameter portion 321 having a larger diameter than the inner diameter of the engaging portion 23 of the anticorrosion sleeve 2 and below the large diameter portion 321. and a small diameter portion 322 having a small diameter. This small diameter portion 322 is part of the groove 33 . The large diameter portion 321 and the small diameter portion 322 are continuous via a step portion 323 . On the other hand, the concave groove 33 of the present embodiment functions as an engaged portion with which the engaging portion 23 of the anti-corrosion sleeve 2 inserted into the insertion shaft portion 32 is engaged. Therefore, the concave groove 33 as the engaged portion includes the small diameter portion 322 .

Further, the concave groove 33 as the engaged portion has a restricting surface 331 . In the present embodiment, it is the upper surface (the surface facing downward) of the surfaces forming the concave groove 33 . In other words, the regulation surface 331 is a surface facing downward, which is provided by the stepped portion 323 positioned between the large diameter portion 321 and the small diameter portion 322 . As shown in FIG. 3 , the restricting surface 331 is perpendicular to the outer peripheral surface of the insertion shaft portion 32 . When the insertion shaft portion 32 is inserted into the anticorrosion sleeve 2 from the lower side (that is, the distal end side in the insertion direction) with respect to the anticorrosion sleeve 2, the restricting surface 331 of the anticorrosion sleeve 2 may By abutting on the distal end surface 231 of the abutment, the insertion after this abutment is restricted. That is, erroneous insertion of the anti-corrosion sleeve 2 is prevented by the abutment.

The lower surface (upward surface) 332 of the surfaces forming the concave groove 33 intersects the outer peripheral surface of the insertion shaft portion 32 at an obtuse angle, that is, the outer peripheral side is inclined downward. It is considered a face. With such a surface, resistance when removing the anticorrosion sleeve 2 from the mounting jig 3 can be reduced compared to, for example, a vertical surface. Therefore, after the anticorrosion sleeve 2 is attached to the water pipe P, the attaching jig 3 can be easily pulled out upward (transition from the state shown in FIG. 8 to the state shown in FIG. 9). Moreover, even when the anticorrosion sleeve 2 is inserted into the insertion shaft portion 32 by mistake as shown in FIG.

Regarding the "lower end portion" where the concave groove 33 (or the engaged portion) is provided, it is a part of the insertion shaft portion 32 that protrudes downward when the anti-corrosion sleeve 2 is properly inserted into the insertion shaft portion 32. The amount of protrusion can be reduced, and moreover, when the anti-corrosion sleeve 2 is inserted into the insertion shaft portion 32 in the opposite direction, the insertion is prevented in a short period of time (specifically, before it is fully inserted). It is preferably partial.

The water pipe anti-corrosion kit 1 is configured as described above. FIG. 4 shows a correct insertion state (a state in which the mounting jig 3 is inserted from the base end side in the insertion direction) during construction. On the other hand, an erroneously inserted state (a state in which the mounting jig 3 is inserted from the distal end side in the insertion direction) is the state shown in FIG. Both states are completely different in appearance. Moreover, the anticorrosion sleeve 2 cannot be inserted upward from the state shown in FIG. For this reason, the operator is likely to notice that he/she has made an incorrect insertion.

A description will be given of how to attach the anti-corrosion sleeve 2 to the water pipe P with the saddle faucet S attached in the correct insertion state. FIG. 6 shows a state in which the mounting jig 3 to which the anti-corrosion sleeve 2 is attached as shown in FIG. 7 shows a state in which the resin sleeve 2A is inserted into the hole H formed in the water pipe P. FIG. In this state, the anti-corrosion sleeve 2 is not fixed to the hole H of the water pipe P yet. FIG. 8 shows a state in which the metal sleeve 2B is press-fitted into the resin sleeve 2A by hitting the shaft of the insertion machine M with a hammer or the like, or by screwing the shaft if the shaft is a screw shaft. . In this state, the resin sleeve 2A is pressed against the inner peripheral surface of the hole H of the water pipe P. As shown in FIG. As a result, the anticorrosion sleeve 2 is fixed to the hole H of the water pipe P. In the state shown in FIG. 8, the insertion shaft portion 32 is in a state where the insertion shaft portion 32 has penetrated into the inner peripheral position of the water pipe P because the mounting jig 3 is subjected to an impact force or a force due to screwing. Thereafter, as shown in FIG. 9, the mounting jig 3 is moved upward together with the shaft of the inserter M. As shown in FIG. Along with this, the mounting jig 3 is pulled out from the anti-corrosion sleeve 2 fixed to the water pipe P, and the anti-corrosion sleeve 2 remains fixed to the water pipe P. The installation of the anti-corrosion sleeve 2 is completed as described above.

As described above, the embodiment of the present invention has been described with some examples, but the present invention is not limited to the above examples, and various modifications can be made without departing from the gist of the present invention. can be done.

For example, as shown in FIGS. 10A and 10B, the engaging portion 23 of the anti-corrosion sleeve 2 has a reduced inner diameter at the lower portion of the resin sleeve 2A, but a reduced outer diameter, as in the above embodiment. It can also be in a form that does not.

Further, as shown in FIGS. 11A and 11B, the engagement portion 23 of the anticorrosion sleeve 2 may be configured to protrude in the inner peripheral direction and the horizontal direction at the lower portion of the resin sleeve 2A.

12A and 12B, the engaging portion 23 of the anti-corrosion sleeve 2 once extends in the inner peripheral direction and obliquely downward at the lower portion of the resin sleeve 2A, and then extends in the inner peripheral direction and diagonally downward direction. It can also have a form that protrudes in the horizontal direction. As described above, the engaging portion 23 can be formed in various forms.

Reference Signs List 1 water pipe anti-corrosion kit 2 anti-corrosion sleeve 23 engaging portion 231 tip surface 3 mounting jig 32 insertion shaft portion 321 large diameter portion 322 small diameter portion 323 stepped portion 33 concave portion (engaged portion)
331 Control surface P Water pipe H Hole

Claims (4)

In order to prevent corrosion of the inner peripheral surface of the hole formed through the water pipe, a cylindrical anti-corrosion sleeve that is inserted into the hole and attached, and a mounting jig that is used to insert the anti-corrosion sleeve into the hole; and
The anti-corrosion sleeve has an engaging portion on the inner peripheral portion of the tip in the direction of insertion into the hole,
The mounting jig includes an insertion shaft portion that is inserted into the anticorrosion sleeve,
An engaged portion with which the engaging portion of the inserted anticorrosive sleeve engages is provided on the outer peripheral portion of the insertion shaft portion,
The engaging portion has a distal end surface at a distal end in the insertion direction,
When the insertion shaft portion is inserted into the anti-corrosion sleeve from the distal end side in the insertion direction, the engaged portion abuts against the distal end face of the engaging portion, thereby preventing insertion after this abutment. A water pipe anti-corrosion kit having a regulating surface that inhibits corrosion. 2. The water pipe anti-corrosion kit according to claim 1, wherein said engaged portion is provided at a distal end portion of said insertion shaft portion in said insertion direction. The insertion shaft portion includes a large diameter portion having a larger diameter than the inner diameter of the engaging portion, and a small diameter portion provided at a distal end side of the large diameter portion in the insertion direction and having a smaller diameter than the large diameter portion. and
The large diameter portion and the small diameter portion are continuous via a stepped portion,
The engaged portion includes the small diameter portion,
The water pipe anti-corrosion kit according to claim 1 or 2, wherein the regulating surface is a surface of the stepped portion and facing the distal end side in the insertion direction. A cylindrical anti-corrosion sleeve provided on the inner peripheral portion of the tip in the direction of insertion into the hole formed by penetrating the water pipe and having an engaging portion having a tip surface at the tip in the direction of insertion is inserted into the hole. A mounting jig for a corrosion protection sleeve for mounting on a
an insertion shaft portion that can be inserted into the anticorrosion sleeve, the insertion shaft portion having an engaged portion that engages with the engaging portion of the inserted anticorrosion sleeve on an outer peripheral portion;
The engaged portion contacts the tip surface of the corrosion protection sleeve when the insertion shaft portion is inserted into the corrosion protection sleeve from the tip end side in the insertion direction, thereby preventing insertion after this contact. A mounting jig for a corrosion protection sleeve that has a restraining surface that prevents the corrosion.

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