JP5275842B2 - Stopcock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow extension of piping and inhibit occurrence of dead water. <P>SOLUTION: In a stop cock 30, when a tube 52 of a tubular member 48 is inserted in the annular groove 16 of a branch piping connection 14 of a header with a water stop member 50 connected to the tubular member 48, slipping-out of the tubular member 48 is prevented by a pipe holding ring 20 and opening of a flow path 18 of the branch piping connection 14 is closed by the tubular member 48 and the water stop member 50. Further, the insertion part 62 of the water stop member 50 is inserted into the flow path 18. The inside of the flow path 18 is thus filled with the insertion part 62 and water is inhibited from entering the flow path 18. Occurrence of dead water in the flow path 18 can be therefore inhibited. Furthermore, when the water stop member 50 is removed from the tubular member 48, piping can be connected to the tubular member 48. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a water stop cock attached to a pipe joint for connecting pipes for water supply and hot water supply.

  Conventionally, a water stop cock that stops an empty pipe passage is known (see, for example, Patent Document 1). The water stop cock is detachable from the empty pipeline so that it can be easily attached to and detached from the empty pipeline.

Japanese Utility Model Publication No. 7-10654

  Some pipe joints for connecting pipes for water supply and hot water supply can be connected with one touch. For example, the pipe joint 10 (here, the header) shown in FIG. 7 includes a plurality of branch pipe connection portions 14 that can connect the resin pipe 12 with one touch. Each branch pipe connecting portion 14 includes an annular groove 16 into which an end of the pipe 12 is inserted, and a flow path 18 that is opened on the radially inner side of the annular groove 16. A metal pipe holding ring 20 is caught on the outer peripheral surface of the pipe 12 inserted into the annular groove 16. This prevents the piping 12 from coming out. Further, an O-ring 22 is provided in the annular groove 16, and the space between the pipe 12 and the branch pipe connecting portion 14 is sealed by the O-ring 22.

  Here, when water is shut off at the branch pipe connecting portion 14 of the pipe joint 10 as described above, a bottomed cylindrical water stop cock 100 as shown in FIG. 7 is generally used. Such a water stopper 100 is formed of a resin material or a metal material, and is inserted into the branch pipe connection portion 14 in the same manner as the pipe 12 (see FIG. 8). Thereby, the pipe holding ring 20 is hooked on the outer peripheral surface of the water stop cock 100, and the water stop cock 100 is prevented from coming off from the branch pipe connection portion 14. Therefore, the water stop cock 100 can be easily attached to the branch pipe connecting portion 14.

  However, once the stop cock 100 as described above is attached to the branch pipe connection portion 14, it cannot be removed from the branch pipe connection portion 14. In particular, when the stop cock 100 is made of resin, the pipe holding ring 20 bites deeply into the outer peripheral surface of the stop cock 100 by applying water pressure of the tap water. Can no longer be removed. For this reason, the pipe 12 cannot be connected to the branch pipe connecting portion 14 to which the water stop cock 100 is attached in the future, and it becomes impossible to cope with the addition of the pipe 12 or the like.

  Moreover, in the branch pipe connection part 14 to which the water stop cock 100 is attached, tap water does not circulate in the flow path 18 (so-called dead water is generated). Such dead water is no longer supplied with sterilizing chlorine contained in tap water, and thus may become unsanitary, and it is necessary to eliminate this.

  In view of the above facts, the present invention has an object to obtain a water stop cock that can be expanded in piping and can suppress the generation of water.

  The water faucet according to the first aspect of the present invention is engaged with an annular groove into which an end portion of the pipe is inserted, a flow path opened radially inward of the annular groove, and a pipe inserted into the annular groove. And a water stopper fitted to a pipe joint provided with an extraction preventing member for preventing the pipe from coming out, and is formed in a cylindrical shape, with one end side inserted into the annular groove, and the extraction prevention A cylindrical member that is prevented from being pulled out by the member, and a plug that is detachably connected to the other end of the cylindrical member, closes the opening on the other end of the cylindrical member, and is inserted into the flow path And a water stop member provided with a portion.

  In the water stop cock according to claim 1, when the water stop member is connected to the other end side of the tubular member, the opening on the other end side of the tubular member is closed. In this state, when one end side of the tubular member is inserted into the annular groove of the pipe joint, the withdrawal prevention member prevents the tubular member from coming out, and the opening of the flow path of the pipe joint forms the tubular member and the water stop member. Is blocked (stopped by water). Furthermore, the insertion part of a water stop member is inserted in the flow path of a pipe joint. Thereby, since the inside of a flow path is filled with an insertion part, infiltration of fluid (water etc.) into a flow path is suppressed. Therefore, it is possible to suppress the occurrence of dead water in the flow path of the pipe joint. And if a water stop member is removed from the other end side of a cylindrical member, piping can be connected to the other end side of a cylindrical member. Thereby, piping and the flow path of a pipe joint can be connected via a cylindrical member, and extension of piping becomes possible.

  The water stopcock according to the invention of claim 2 is the water stopcock according to claim 1, wherein the cylindrical member and the water stop member are formed by a male screw provided on one side and a female screw provided on the other side. It is characterized by being connected by screwing.

  In the water stop cock according to claim 2, since the cylindrical member and the water stop member are firmly connected by the screwing of the male screw and the female screw, even when a high water pressure is applied to these members, the connection state of both members Can be maintained well.

  The stop cock according to the invention of claim 3 is the stop cock according to claim 1 or 2, wherein the tubular member is provided between the inner peripheral portion of the flow path and the insertion portion. It has the sealing means which seals between the said insertion part.

  In the water stop cock according to claim 3, the space between the inner peripheral portion of the flow path of the pipe joint and the insertion portion, or between the tubular member and the insertion portion is sealed by the sealing means. As a result, the intrusion of water between the inner peripheral part of the flow path and the plug-in part or between the cylindrical member and the plug-in part is suppressed, so that the generation of water can be suppressed well. it can.

  According to a fourth aspect of the present invention, there is provided the water stop cock according to the third aspect, wherein the sealing means is provided on a distal end side of the insertion portion, and the inner peripheral portion of the flow path and the It is characterized by sealing between the insertion part.

  In the water stopcock according to claim 4, the sealing means is provided on the tip side of the insertion part inserted into the flow path of the pipe joint, and the inner peripheral part and the insertion part of the flow path are provided by the sealing means. Is sealed. Therefore, it is possible to reduce the intrusion of water into the flow path as much as possible, thereby making it possible to completely prevent the generation of water.

  As described above, with the stop cock according to the present invention, it is possible to increase the number of pipes and to suppress the generation of water.

It is the fragmentary sectional view which looked at the header with which the water stopcock which concerns on embodiment of this invention was mounted | worn from the top. It is a fragmentary sectional view which shows the structure of the branch pipe connection part of the header to which a water stopper and this water stopper are mounted | worn. It is a fragmentary sectional view which shows the state with which the water stop cock was mounted | worn with the branch piping connection part. It is a fragmentary sectional view corresponding to FIG. 3 which shows the state from which the water stop member was removed from the cylindrical member which is a structural member of a water stop cock. It is a fragmentary sectional view which shows the modification of the sealing means which is a component of a water stop cock. It is a fragmentary sectional view which shows the modification of the connection structure of a cylindrical member and a water stop member. It is a fragmentary sectional view of the conventional water stop cock and the header with which this water stop cock is mounted. It is a fragmentary sectional view which shows the state with which the water stop cock shown by FIG. 7 was mounted | worn with the branch piping connection part of the header.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 shows a pipe joint 10 to which a stop cock 30 according to this embodiment is attached. The pipe joint 10 has the same configuration as that of the pipe joint 10 (hereinafter referred to as “header 10”) described in the section of the problem to be solved by the invention. Here, the header 10 will be described in more detail. To do.

  The header 10 is a pipe joint (so-called inner surface water-stopping joint) for connecting a pipe 12 for water supply / hot water supply, and the main pipe part 32 and a plurality of branch pipe connection parts 14 branched from the main pipe part 32 are integrated. In preparation. A flow path 34 through which tap water flows is provided on the inner side (inside the cylinder) of the main pipe portion 32. Further, the branch pipe connecting portion 14 is provided with a synthetic resin inner cylinder 36, and the flow path 18 branched from the flow path 34 is provided inside the inner cylinder 36 (inside the cylinder). .

  A circumferential groove 38 is formed on the outer surface of the inner cylinder 36, and the O-ring 22 is fitted in the circumferential groove 38. A synthetic resin outer cylinder 42 is coaxially arranged on the outer peripheral side of the inner cylinder 36. A pipe holding ring 20 (extraction preventing member) having a V-shaped cross section is provided on the distal end side of the outer cylinder 42. The pipe holding ring 20 is prevented from dropping from the outer cylinder 42 by a cylindrical cap 46 attached to the outer cylinder 42.

  An annular groove 16 (annular gap) into which the end of the resin pipe 12 is inserted is formed between the outer cylinder 42 and the cap 46 and the inner cylinder 36. The inner peripheral side end of the pipe holding ring 20 is caught on the outer peripheral portion of the pipe 12 inserted into the annular groove 16, thereby preventing the pipe 12 from coming out. Further, an O-ring 22 is in close contact with the inner peripheral surface of the pipe 12 inserted into the annular groove 16, and a seal (so-called inner surface seal) is provided between the outer peripheral surface of the inner cylinder 36 and the inner peripheral surface of the pipe 12. .

  On the other hand, one end portion of the main pipe portion 32 (the right end portion in FIG. 1) has the same configuration as the branch pipe connection portion 14, and tap water is supplied to the flow path 34 at one end portion of the main pipe portion 32. For this purpose, a pipe 12 is connected. Although not shown, the other end portion of the main pipe portion 32 is bent in an L shape, and the branch pipe connection portion 14 is provided in the bent portion.

In the configuration shown in FIG. 1, the water stopcock 30 according to this embodiment is attached to one of the branch pipe connection portions 14.
(Details of the stop cock 30)
As shown in FIG. 2, the water stop cock 30 according to this embodiment includes a tubular member 48 and a water stop member 50. The cylindrical member 48 is made of metal in the present embodiment, and is formed in a cylindrical shape as a whole. A cylindrical portion 52 having the same inner and outer diameter as that of the pipe 12 is provided on one axial end side (right side in FIG. 2) of the cylindrical member 48. As shown in FIG. 3, the cylindrical portion 52 is configured to be inserted into the annular groove 16 of the branch pipe connecting portion 14 in the same manner as the pipe 12.

  A peripheral groove (not shown) is formed on the outer peripheral portion of the cylindrical portion 52 so that when the cylindrical portion 52 is inserted into the annular groove 16, the inner peripheral end of the pipe holding ring 20 is caught by the peripheral groove. It has become. Thereby, the cylindrical member 48 is prevented from coming off from the branch pipe connecting portion 14.

  A connecting portion 54 having a larger diameter than the cylindrical portion 52 is integrally provided on the other axial end side of the cylindrical portion 52. The connecting portion 54 is formed in a hexagonal nut shape on the outer peripheral portion, and a pipe taper screw 56 (female screw) is formed on the inner peripheral portion of the connecting portion 54.

  On the other hand, the water stop member 50 is made of metal in the present embodiment, and includes a main body portion 58 formed in a substantially bolt shape. The main body 58 has a pipe taper screw 60 (male screw) formed on the outer peripheral portion on one end side in the axial direction, and the outer peripheral portion on the other end side in the axial direction is formed in a hexagonal shape. As shown in FIG. 3, the main body portion 58 is connected (attached) to the other axial end of the cylindrical member 48 when the taper screw 60 is screwed into the taper screw 56 of the cylindrical member 48. . As a result, the opening on the other axial end side of the cylindrical member 48 is closed by the main body portion 58.

  Further, an insertion portion 62 is provided on one end side in the axial direction of the main body portion 58. The insertion part 62 is formed in a stepped columnar shape, and is provided coaxially and integrally with the main body part 58. The insertion portion 62 has a large diameter portion 62A on the main body portion 58 side, and a small diameter portion 62B on the opposite side to the main body portion 58 via the large diameter portion 62A. As shown in FIG. 3, the small diameter portion 62 </ b> B is formed in the flow path 18 of the branch pipe connection portion 14 in a state where the tubular member 48 to which the water blocking member 50 is connected is inserted into the branch pipe connection portion 14. It is designed to be inserted coaxially.

  In the present embodiment, when the small diameter portion 62B is inserted into the flow path 18, the tip of the small diameter section 62B reaches the vicinity of the flow path 34 of the main pipe portion 32. Further, the outer diameter dimension of the small diameter part 62B is formed slightly smaller than the inner diameter dimension of the flow path 18, and most of the flow path 18 is filled with the small diameter part 62B.

  Further, a circumferential groove 64 is formed in the outer peripheral portion on the distal end side of the small diameter portion 62B, and an O-ring 66 as a seal member is fitted in the circumferential groove 64. The O-ring 66 is in close contact with the inner peripheral surface of the flow channel 18 (the inner peripheral surface of the inner cylinder 36) in a state where the small diameter portion 62B is inserted into the flow channel 18. Thereby, the space between the inner cylinder 36 and the small diameter portion 62B is sealed.

  Next, the operation and effect of this embodiment will be described.

  In the present embodiment, when the branch pipe connection portion 14 of the header 10 is stopped by the water stop cock 30, first, the taper screw 60 of the water stop member 50 is screwed into the taper screw 56 of the tubular member 48. The water stop member 50 is connected to the other axial end of the cylindrical member 48. As a result, the opening on the other axial end side of the cylindrical member 48 is closed by the main body 58 of the water stop member 50.

  In this state, when the tubular portion 52 of the tubular member 48 is inserted into the annular groove 16 of the branch pipe connecting portion 14, the space between the tubular portion 52 and the inner tube 36 is sealed by the O-ring 22 and the pipe holding ring 20. The inner peripheral side end of the cylindrical member 48 is caught in a peripheral groove (not shown) formed in the outer peripheral portion of the cylindrical portion 52, and the cylindrical member 48 is prevented from coming out. Thereby, the opening of the flow path 18 is closed (water-stopped) by the cylindrical member 48 and the water-stop member 50.

  Further, the small diameter portion 62B of the insertion portion 62 is inserted into the flow path 18, and the space between the inner cylinder 36 and the small diameter portion 62B is sealed by an O-ring 66 provided on the distal end side of the small diameter portion 62B. This prevents water from entering deeper than the O-ring 66 (left side in FIG. 3) in the flow path 18, thereby preventing water from being deadly generated in the flow path 18.

  Moreover, in the water stop cock 30, the tubular member 48 and the water stop member 50 are firmly connected by the screwing of the taper screws 56 and 60, and therefore even when a high water pressure is applied to these members, The connection state can be maintained well.

  On the other hand, when it becomes necessary to connect the pipe 12 to the branch pipe connecting portion 14 that has been stopped by the water stop cock 30, as shown in FIG. What is necessary is just to remove the water stop member 50 from. This makes it possible to connect another pipe joint (for example, an adapter joint formed with a male taper screw) or the like to the other end side of the cylindrical member 48, so that the pipe 12 is connected via the pipe joint. And the header 10 can be connected, and the piping 12 can be added.

  In the above embodiment, the case where the O-ring 66 provided in the insertion portion 62 of the water stop member 50 is applied as the sealing means has been described. However, the present invention is not limited to this, and the configuration of the sealing means is appropriately set. Can be changed. For example, as shown in FIG. 5, a circumferential groove 68 is formed on the inner circumferential surface of the tubular member 48, and the tubular member 48 and the insertion portion 62 (large diameter) are formed by an O-ring 70 fitted in the circumferential groove 68. It may be configured that the space between the portion 62A) is sealed. Further, when most of the flow path 18 is filled with the insertion portion 62 (small diameter portion 62B) as in the above embodiment, sealing means such as an O-ring may be omitted. Even in this case, since the intrusion of water into the flow path 18 can be greatly reduced, the generation of water can be satisfactorily suppressed.

  Moreover, in the said embodiment, although the cylindrical member 48 and the water stop member 50 were set as the structure connected by the screwing of the taper screws 56 and 60, this invention is not limited to this, The cylindrical member 48 and the water stop The connection structure with the member 50 can be changed as appropriate. For example, as shown in FIG. 6, the tubular member 48 and the water stop member 50 may be connected by a fastener 72. The fastener 72 is formed by bending a sheet metal material having a spring property into a substantially C shape, and is wound around an outer peripheral portion of a connection portion between the tubular member 48 and the water stop member 50. . The fastener 72 is provided with a plurality of grooves 74 along the circumferential direction, and the groove 74 provided in the tubular member 48 and the flange provided in the water stop member 50 are provided in these grooves 74. 78 is inserted. Thereby, when the fastener 72 clamps the collar parts 76 and 78, the cylindrical member 48 and the water stop member 50 are connected so that separation is impossible. Even in the case of this configuration, there are basically the same effects as the above embodiment.

  Moreover, although the said embodiment demonstrated the case where the water stop cock 30 was mounted | worn with the header 10, it is not restricted to this, The water stop cock which concerns on this invention is fundamentally the same structure as the branch piping connection part 14. FIG. Any pipe joint provided with a connecting portion (a pipe joint having a configuration in which an end of a pipe is inserted into an annular groove radially outside the flow path) can be applied.

  The present invention has been described with reference to the embodiments. However, these embodiments are merely examples, and various modifications can be made without departing from the scope of the invention. It goes without saying that the scope of rights of the present invention is not limited to these embodiments.

DESCRIPTION OF SYMBOLS 10 Pipe joint 12 Pipe 14 Branch pipe connection part 16 Annular groove 18 Flow path 20 Pipe holding ring (extraction prevention member)
30 Water stop valve 48 Tubular member 50 Water stop member 56 Taper screw (female screw)
60 Taper screw (Male thread)
62 Insertion part 66 O-ring (sealing means)
70 O-ring (sealing means)

Claims (4)

An annular groove into which an end of the pipe is inserted, a flow path opened on the radially inner side of the annular groove, and an extraction preventing member that engages with the pipe inserted into the annular groove and prevents the pipe from coming out. A water stopcock attached to a pipe joint with
A cylindrical member that is formed in a cylindrical shape, one end side of which is inserted into the annular groove, and that is prevented from being pulled out by the extraction blocking member;
A water stop member that is detachably connected to the other end side of the tubular member, closes the opening on the other end side of the tubular member, and is provided with an insertion portion that is inserted into the flow path.
A stop cock characterized by comprising:   2. The water stop cock according to claim 1, wherein the cylindrical member and the water stop member are connected by a male screw provided on one side being engaged with a female screw provided on the other side.   3. The sealing device according to claim 1, further comprising a sealing unit that seals between the inner peripheral portion of the flow path and the insertion portion, or between the cylindrical member and the insertion portion. Water stopcock.   The water stop cock according to claim 3, wherein the sealing means is provided on a distal end side of the insertion portion and seals between an inner peripheral portion of the flow path and the insertion portion.

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