JP2007046710A - Sheath pipe connecting member, sheath pipe connecting structure, and sheath pipe connecting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheath pipe connecting member, a sheath pipe connecting structure, and a sheath pipe connecting method capable of easily connecting the sheath pipe to a faucet box without replacing the faucet box even in the case where the outer diameter of the sheath pipe is changed. <P>SOLUTION: The sheath pipe connecting member 29 is equipped with a cylindrical member 30 allowing insertion of the sheath pipe 13 and which is fitted into a cylindrical insertion part 15. A recess 31 engaged to an engagement claw 26 formed on the insertion part 15 is formed on an outer peripheral face 30a of the cylindrical member in a state of the cylindrical member 30 being fitted to the insertion part 15. A protrusion 32 is formed to protrude toward the inside of the cylindrical member 30 from an inner peripheral face 30b so as to engage with the recess 22 of the sheath pipe in a state of the sheath pipe 13 being inserted in the cylindrical member 30. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sheath tube connection member, a sheath tube connection structure, and a sheath tube connection method suitable for connection between a sheath tube and a faucet box in a so-called sheath tube header construction method.

  Conventionally, as a water supply piping method in a building, for example, by connecting a sheath pipe extending from a header to a faucet box provided in a wall, a water supply pipe passed through the sheath pipe is provided in the faucet box. A sheath pipe header method for connecting to a water tap is known (for example, see Patent Documents 1 and 2).

  The faucet box is provided with a cylindrical insertion portion that allows insertion of a sheath tube. A concave portion is formed on the outer peripheral surface of the sheath tube, and a locking claw protruding from the peripheral wall to the inside of the insertion portion is formed on the peripheral wall of the insertion portion. The sheath tube can be connected to the faucet box by inserting the sheath tube into the cylindrical member and locking the retaining claws of the insertion portion in the recess formed in the sheath tube.

For example, the outer diameter of the sheath tube varies depending on the purpose of use. For this reason, a dedicated faucet box is prepared for each sheath tube having a different outer diameter at the construction site.
Japanese Patent Laid-Open No. 9-26068 (page 3, FIG. 1) JP-A-10-168959 (page 2-3, FIG. 2)

  However, since a dedicated faucet box is prepared for each sheath tube, for example, it is necessary to quickly replace the sheath tube prepared at the construction site with another sheath tube having an outer diameter smaller than the outer diameter. The engaging claw of the insertion portion cannot be engaged with the recess formed in the other sheath tube, and the other sheath tube cannot be connected to the faucet box. It is conceivable to replace the faucet box with another faucet box that is compatible with the other sheath tube. However, if the faucet box is to be replaced quickly at the construction site, the other faucet box is prepared at the construction site. In many cases, the faucet box cannot be replaced, and even if the other faucet box is prepared at the construction site, the faucet box already assembled in the building is not attached to the other faucet box. It takes time and effort to reassemble the faucet box, leading to extended construction time.

  Therefore, an object of the present invention is to provide a sheath tube connection member and a sheath tube connection structure that can easily connect the sheath tube to the faucet box without replacing the faucet box even when the outer diameter of the sheath tube is changed. And providing a sheath tube connecting method.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a faucet box for connecting the water supply pipe and the water faucet to each other with a sheath pipe in which the water supply pipe is inserted and a recess is formed on the outer peripheral surface. An inter-sheath connection member for connecting to the faucet box, allowing insertion of the sheath pipe to assist the connection of the sheath pipe to the faucet box, and in a cylindrical insertion portion provided in the faucet box A cylindrical member to be fitted is provided, and an outer peripheral surface of the cylindrical member is formed with a concave portion that engages with a locking claw formed in the insertion portion when the cylindrical member is fitted to the insertion portion. And projecting inward of the cylindrical member from the inner peripheral surface to engage with the concave portion of the sheath tube when the sheath tube is inserted into the tubular member. Protruding portions that are formed are formed.

  According to a second aspect of the present invention, in the first aspect of the present invention, the concave portion of the sheath tube is formed so as to go around the sheath tube along a circumferential direction thereof, and the protrusion is It is formed so that it may extend in the circumferential direction of the said cylindrical member on the said internal peripheral surface of a cylindrical member.

  The invention according to claim 3 is a connection between a sheath pipe in which a water supply pipe is inserted and a concave portion rotating in the circumferential direction is formed on the outer peripheral surface, and a faucet box for mutual connection of the water supply pipe and the water tap. A cylindrical insertion portion formed in the faucet box and allowing the sheath tube to be inserted into the faucet box; and a circumferential wall of the insertion portion spaced apart from each other in the circumferential direction of the insertion portion. An elastically deformable locking claw formed from the peripheral wall and projecting inward of the insertion portion, and allowing the insertion of the sheath tube to assist the fitting of the sheath tube into the insertion portion. And a sleeve tube connecting member having a cylindrical member inserted into the insertion portion, and is locked to the outer peripheral surface of the cylindrical member by the locking claw in a state where the cylindrical member is inserted into the insertion portion. A recess is formed, and the sheath tube is inserted into the tubular member on the inner peripheral surface of the tubular member when the sheath tube is inserted into the tubular member. Wherein the protruding portion protruding inward of the cylindrical member from the inner peripheral surface to engage the recess is formed.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the concave portion of the sheath tube is formed so as to go around the sheath tube along a circumferential direction thereof, and the protrusion is It is formed so that it may extend in the circumferential direction of the said cylindrical member on the said internal peripheral surface of a cylindrical member.

  The invention according to claim 5 is a sheath tube connection method using the sheath tube connection member according to claim 1, wherein the sheath tube is inserted into the cylindrical member and formed on the outer peripheral surface of the sheath tube. The protrusion formed on the inner peripheral surface of the cylindrical member is engaged with the recessed portion formed, the cylindrical member is inserted into the insertion portion of the faucet box, and the engagement formed on the insertion portion. Engaging a pawl with the recess formed in the outer peripheral surface of the cylindrical member.

  According to the first aspect of the present invention, the sheath tube connecting member includes a tubular member that allows insertion of the sheath tube and is fitted into a tubular insertion portion provided in the faucet box. A concave portion is formed on the outer peripheral surface to be engaged with a locking claw formed on the insertion portion when the cylindrical member is fitted to the insertion portion, and a sheath into the cylindrical member is formed on the inner peripheral surface of the cylindrical member. Since a protrusion protruding from the inner peripheral surface to the inside of the cylindrical member is formed to engage with the recess of the sheath tube in the inserted state of the tube, for example, a sheath tube prepared at the construction site is When it is necessary to quickly replace another sheath tube having an outer diameter smaller than the diameter, the other sheath tube is inserted into the tubular member, and the projection of the tubular member is engaged with the concave portion of the sheath tube. By inserting the member into the insertion part and engaging the locking claw of the insertion part with the recess of the cylindrical member, The other sheath tube faucet box that does not conform to the other sheath pipe Chi can be connected via a tubular member.

  Therefore, when changing the outer diameter of the sheath tube, there is no need to replace the faucet box already assembled in the building with another faucet box. Without inviting, the other sheath tube can be easily connected to the faucet box already assembled in the building.

  According to invention of Claim 2, the recessed part of a sheath pipe is formed so that a sheath pipe may be turned along the circumferential direction, and the projection part formed in the internal peripheral surface of a cylinder member is a cylinder member. Therefore, it is possible to increase the locking force of the projection to the sheath tube compared to when the sheath tube is locked with, for example, a single pin-like projection. Can be reliably held in the cylindrical member.

  According to the invention described in claim 3, the sheath tube connecting member includes a tubular member that allows the insertion of the sheath tube and is fitted into a tubular insertion portion provided in the faucet box. A concave portion is formed on the outer peripheral surface to be engaged with a locking claw formed on the insertion portion when the cylindrical member is fitted to the insertion portion, and a sheath into the cylindrical member is formed on the inner peripheral surface of the cylindrical member. Since a protrusion protruding from the inner peripheral surface to the inside of the cylindrical member is formed to engage with the recess of the sheath tube in the inserted state of the tube, for example, a sheath tube prepared at the construction site is When it is necessary to quickly replace another sheath tube having an outer diameter smaller than the diameter, the other sheath tube is inserted into the tubular member, and the projection of the tubular member is engaged with the concave portion of the sheath tube. By inserting the member into the insertion part and engaging the locking claw of the insertion part with the concave part of the cylindrical member, it is already assembled in the building and fits the other sheath tube Not the water tap box other sheath tube can be connected through the tubular member.

  Therefore, when changing the outer diameter of the sheath tube, there is no need to replace the faucet box already assembled in the building with another faucet box. The other sheath tube can be easily connected to the faucet box without incurring.

  According to invention of Claim 4, the recessed part of a sheath pipe is formed so that a sheath pipe may be turned along the circumferential direction, and the projection part formed in the internal peripheral surface of a cylinder member is a cylinder member. Therefore, it is possible to increase the locking force of the projection to the sheath tube compared to when the sheath tube is locked with, for example, a single pin-like projection. Can be reliably held in the cylindrical member.

  According to the invention of claim 5, the sheath tube is inserted into the cylindrical member, and the protrusion formed on the inner peripheral surface of the cylindrical member is engaged with the recess formed on the outer peripheral surface of the sheath tube, Insert the tubular member into the insertion part of the faucet box, and connect the sheath tube to the faucet box by engaging the locking claw formed in the insertion part with the recess formed on the outer peripheral surface of the tubular member It can be connected via a member.

  The present invention will be described with reference to the illustrated embodiments.

  FIG. 1 shows a sheath pipe connection structure 10 according to the present invention for connecting a sheath pipe 13 into which a water supply pipe 12 is inserted into a faucet box 11 provided in a house in a well-known sheath pipe header construction method. An example using is shown.

  As is well known in the art, the sheath tube 13 extends from a header (not shown) disposed in, for example, an underfloor space of a house to the faucet box 11 through the underfloor space. A plurality of recesses 22 are formed on the outer peripheral surface 13 a of the sheath tube 13. In the illustrated example, the recesses 22 are formed on the outer peripheral surface 13 a of the sheath tube 13 so as to go around the sheath tube 13 in the circumferential direction and be equidistant from each other along the axis of the sheath tube 13. As is well known in the art, there are a plurality of types of sheath tubes 13 having different outer diameters so that they can be selectively used according to the purpose of use. A special faucet box 11 is manufactured.

  The faucet box 11 includes a box main body 14 attached to, for example, a wall 16 of a house, and an insertion portion 15 provided in the box main body and into which the sheath tube 13 is inserted.

  The box body 14 has a contact surface 14a that can contact the back surface 16a of the wall 16 of the house. The contact surface 14a is formed with an attachment port 18 to which a water faucet (not shown) is attached from the indoor side of the house (the right side of the wall 16 as viewed in FIG. 1) through an opening 16b formed in the wall 16. ing. An insertion port 19 that allows the water supply pipe 12 to be inserted into the box body 14 is formed on the lower surface 14 b of the box body 14. The water supply pipe 12 inserted into the box main body 14 through the insertion port 19 is connected to the water supply tap by a pipe joint 20 provided in the box main body 14.

  The insertion portion 15 includes a cylindrical member 21 that allows the insertion of the sheath tube 13, and a cylindrical locking member 22 that is attached to the cylindrical member and that locks the sheath tube 13 inserted into the cylindrical member 21. It is configured.

  The cylindrical member 21 is provided at one end 21 a so as to surround the insertion port 19 around the edge 19 a of the insertion port 19 of the box body 14. The outer peripheral surface 23 at the other end 21b of the cylindrical member 21 is threaded in the illustrated example. The diameter of the cylindrical member 21 is different for each faucet box 11 manufactured according to the sheath tube 13 having a different outer diameter.

  The locking member 22 has a fitting end 24 to which the other end 21b of the cylindrical member 21 is fitted at one end thereof. The inner peripheral surface 24 a of the fitting end portion 24 is threaded so that it can be screwed into the other end portion 21 b of the cylindrical member 21. The locking member 22 is attached to the cylindrical member 21 by the fitting end portion 24 being screwed into the other end portion 21 b of the cylindrical member 21. Similar to the diameter of the cylindrical member 21, the diameter of the locking member 22 is different for each faucet box 11. On the peripheral wall 25 of the locking member 22, there are a plurality of locking claws 26 that can be engaged with the concave portion 22 of the sheath pipe in a state where the sheath pipe 13 having an outer diameter suitable for each faucet box 11 is inserted. Is formed.

  As shown in FIG. 2, each locking claw 26 is formed of a material that can be elastically deformed. Further, in the illustrated example, the respective locking claws 26 are arranged at equal intervals along the circumferential direction of the locking member 22 at the other end portion 27 of the locking member 22. The other end 27 extends in the axial direction of the locking member 22 along the inner peripheral surface 24a of the locking member 22. Locking portions 28 that are respectively engaged with the recesses 22 of the sheath tube 13 are formed at the distal ends 26 a of the locking claws 26. Each locking portion 28 protrudes from the tip 26 a of each locking claw 26 toward the inside of the locking member 22.

  Furthermore, the sheath tube connection structure 10 according to the present invention includes a sheath tube connection member 29 for connecting the sheath tube 13 to the faucet box 11 adapted to the sheath tube having an outer diameter larger than the outer diameter.

  As shown in FIG. 2, the sheath tube connecting member 29 includes a cylindrical tube member 30 that allows the sheath tube 13 to be inserted and is fitted to the insertion portion 15 of the faucet box 11.

  On the outer peripheral surface 30 a of the cylindrical member 30, a plurality of recesses 31 that are locked to the locking claws 26 of the locking member 22 of the insertion portion 15 are formed. In the illustrated example, the recesses 31 are formed on the outer peripheral surface 30 a of the cylindrical member 30 so as to be spaced apart from each other along the axis of the cylindrical member 30 and to turn in the circumferential direction of the cylindrical member 30.

  In addition, a plurality of protrusions 32 that can be engaged with the concave portion 22 of the sheath tube when the sheath tube 13 is inserted into the tubular member 30 are formed on the inner peripheral surface 30 b of the tubular member 30. In the illustrated example, each protrusion 32 is formed so as to extend in the circumferential direction of the tubular member 30 at both ends of the tubular member 30 and the longitudinal central portion of the tubular member 30. The tip 32a of each projection 32 is hemispherical in the illustrated example. Further, the interval between the protrusions 32 is set to be an integral multiple of the interval between the recesses 22 formed on the outer peripheral surface 13 a of the sheath tube 13.

  When connecting the sheath tube 13 to the faucet box 11 using the sheath tube connecting member 29, first, the distal end portion of the sheath tube 13 is inserted into the tubular member 30 and formed on the inner peripheral surface 30 b of the tubular member 30. The protrusions 32 are engaged with the recesses 22 corresponding to the protrusions 32 among the plurality of recesses 22 formed on the outer peripheral surface 13 a of the sheath tube 13. At this time, as described above, the tip 32a of each projection 32 has a hemispherical shape, and therefore, the frictional force that the sheath tube 13 receives from each projection 32 when the sheath tube 13 is inserted into the cylindrical member 30 is obtained. Can be reduced. Thereby, insertion of the sheath pipe | tube 13 in the cylinder member 30 can be performed easily.

  Next, the cylindrical member 30 attached to the sheath tube 13 is inserted into the locking member 22 of the insertion portion 15 of the faucet box 11, and each locking claw 26 formed on the locking member is inserted into the cylindrical member 30. It is made to engage with each recessed part 31 formed in the outer peripheral surface 30a. As a result, the sheath tube 13 is fixed to the locking member 22 via the tubular member 30, whereby the sheath tube 13 is connected to the faucet box 11 via the sheath tube connecting member 29.

  According to the present embodiment, as described above, the sheath tube connecting member 29 allows the insertion of the sheath tube 13 and is fitted into the tubular insertion portion 15 provided in the faucet box 11. A concave portion 31 is formed on the outer peripheral surface 30a of the cylindrical member so as to be engaged with a locking claw 26 formed in the insertion portion 15 in a fitted state of the cylindrical member 30 with the insertion portion 15. A protruding portion 32 that protrudes inward of the cylindrical member 30 from the inner peripheral surface 30b to engage with the concave portion 22 of the sheath tube 13 in a state where the sheath tube 13 is inserted into the cylindrical member 30 on the inner peripheral surface 30b of the member 30. Is formed.

  Thereby, for example, when it is necessary to quickly replace the sheath tube 13 prepared at the construction site with another sheath tube having an outer diameter smaller than the outer diameter, the other sheath tube is inserted into the cylindrical member 30. Then, the protrusion 32 of the cylindrical member 30 is engaged with the recess 22 of the sheath tube, the cylindrical member 30 is inserted into the insertion portion 15, and the locking claw 26 of the insertion portion 15 is engaged with the recess 31 of the cylindrical member 30. By doing so, the other sheath tube can be connected to the faucet box 11 already assembled in the building, that is, the faucet box 11 not compatible with the other sheath tube, via the tubular member 30.

  Therefore, when the outer diameter of the sheath tube 13 is changed, it is not necessary to replace the faucet box 11 already assembled in the building with another faucet box 11, so that the conventional construction by reassembling the faucet box 11 is performed. The other sheath tube can be easily connected to the faucet box 11 already assembled in the building without incurring time extension.

  Further, as described above, each recess 22 of the sheath tube 13 is formed so as to go around the sheath tube 13 along its circumferential direction, and each protrusion 32 formed on the inner peripheral surface 30 b of the cylindrical member 30. However, since each extends in the circumferential direction of the tubular member 30, the protrusion 32 is locked to the sheath 13 compared to the case where the sheath 13 is locked by, for example, a single pin-shaped protrusion 32. Since the force can be increased, the sheath tube 13 can be securely held in the cylindrical member 30.

  Furthermore, as described above, the plurality of protrusions 32 are formed at intervals from each other along the axis of the cylindrical member 30, so that compared to the case where the single protrusion 32 is formed on the cylindrical member 30. Since the degree of freedom of the engagement position of the protrusion 32 to the recess 22 of the sheath tube 13 can be increased, the sheath tube 13 can be held in the tubular member 30 at a desired insertion position. In addition, since the plurality of protrusions 32 are formed at intervals from each other along the axis of the cylindrical member 30, one of the plurality of protrusions 32 of the cylindrical member 30 and the concave portion of the sheath tube 13. Even if the engagement with 22 is released, the recess 22 can be engaged with the other protrusion 32, so that the extraction of the sheath tube 13 from the insertion portion 15 can be more reliably prevented. .

  Further, as described above, a plurality of locking claws 26 are formed on the locking member 22 of the insertion portion 15 along the circumferential direction of the locking member 22. Since the outer peripheral surface 30a of the cylindrical member 30 is formed so as to rotate along the circumferential direction of the cylindrical member 30, the cylindrical member 30 is united by engaging the plurality of locking claws 26 with the recess 31 of the cylindrical member 30. Compared with the case where the locking claw 26 is used for locking, the locking force received by the cylindrical member 30 from the locking claw 26 can be increased, so that the cylindrical member 30 can be securely held in the insertion portion 15. .

  Furthermore, as described above, the plurality of recesses 31 are formed on the outer peripheral surface 30 a of the cylindrical member 30 at intervals from each other along the axis of the cylindrical member 30. Since the degree of freedom of the locking position of the locking claw 26 to the cylindrical member 30 can be increased as compared with the case where the cylindrical member 30 is formed, the cylindrical member 30 can be held in the insertion portion 15 at a desired insertion position. . Further, since the plurality of recesses 31 are formed at intervals along the axis of the cylindrical member 30, the locking claw 26 that is locked to one of the plurality of recesses 31 of the cylindrical member 30. Even if the locking is released, the locking claw 26 can be locked to the other concave portion 31, so that the extraction of the cylindrical member 30 from the insertion portion 15 can be more reliably prevented.

  In the present embodiment, when the tubular member 30 is attached to the sheath tube 13, the sheath tube 13 is inserted into the tubular member 30, but instead, as shown in FIGS. 3A and 3B. On the peripheral wall 30c of the cylindrical member 30, a cutting portion 33 is formed that extends along the axis of the cylindrical member 30 and cuts the peripheral wall 30c so as to open at both ends of the cylindrical member, and then opens the cutting portion. The cylindrical member 30 can be easily attached to the sheath tube 13 from the side.

  Further, instead of the example shown in FIG. 3, as shown in FIGS. 4A and 4B, it extends along the axis of the cylindrical member 30 to the peripheral wall 30 c of the cylindrical member 30, and extends to both ends of the cylindrical member 30. A cutout 34 cut out to open can be formed.

  In this case, the tubular member 30 can be easily attached to the sheath tube 13 from the side by fitting the sheath tube 13 into the tubular member 30 from the cut portion 34. Further, the insertion position of the sheath tube 13 into the cylindrical member 30 can be visually confirmed. Furthermore, since the peripheral wall 30c of the cylindrical member 30 is partially cut off, the amount of material for forming the cylindrical member 30 can be reduced, and thus the manufacturing cost can be reduced.

  In the present embodiment, an example in which a plurality of recesses 31 are formed on the outer peripheral surface 30a of the cylindrical member 30 has been described. Instead, for example, both end portions of the cylindrical member 30 and the outer peripheral surface 30a of the cylindrical member 30 and The recessed part 31 can be formed in each of the center part of the longitudinal direction of the cylinder member 30, or the single recessed part 31 can be formed in a desired position.

  Furthermore, in the present embodiment, an example in which the protrusions 32 are formed at both end portions of the cylindrical member 30 and the central portion in the longitudinal direction of the cylindrical member 30 on the inner peripheral surface 30b of the cylindrical member 30 is shown. Instead, the single protrusion 32 can be formed on the inner peripheral surface 30b of the cylindrical member 30 at a desired position.

  Further, in the present embodiment, the example in which each protrusion 32 extends along the circumferential direction of the tubular member 30 is shown, but instead, the protrusion 32 is disposed along the circumferential direction of the tubular member 30. Each of the plurality of protrusions may be configured.

1 is a longitudinal sectional view schematically showing a sheath tube connection structure according to the present invention. It is a longitudinal section showing a sheath pipe connecting member concerning the present invention roughly. (A) is a top view which shows schematically the sheath pipe connection member different from the example shown in FIG. 2, (b) is a cross-sectional view along the II line | wire of (a). . (A) is a top view which shows schematically the sheath pipe connection member different from the example shown in FIG. 3, (b) is a cross-sectional view along the II line | wire of (a). .

Explanation of symbols

11 Faucet box 12 Water supply pipe 13 Sheath pipe 13a Outer peripheral surface (outer peripheral surface of the sheath pipe)
15 Insertion part 22 Recessed part (recessed part of sheath tube)
29 Shell tube connecting member 30 Tube member 26 Locking claw 30a Outer peripheral surface (outer peripheral surface of the cylindrical member)
30b Inner peripheral surface (inner peripheral surface of cylindrical member)
31 Concave part (concave part of a cylindrical member)
32 Protrusion

Claims (5)

  An inter-sheath connecting member for connecting a sheath pipe in which a water supply pipe is inserted and a recess is formed on an outer peripheral surface thereof to a faucet box for mutual connection of the water supply pipe and the water faucet, A cylindrical member that allows the insertion of the sheath tube to assist the connection of the sheath tube to be fitted into a tubular insertion portion provided in the faucet box, A concave portion that engages with a locking claw formed in the insertion portion is formed in the fitting state of the cylindrical member to the insertion portion, and an inner peripheral surface of the cylindrical member is formed on the inner surface of the cylindrical member. A protruding portion protruding from the inner peripheral surface to the inside of the cylindrical member is formed so as to be engaged with the concave portion of the sheath tube in the inserted state of the sheath tube. .   The concave portion of the sheath tube is formed so as to go around the sheath tube along a circumferential direction thereof, and the protruding portion extends on the inner circumferential surface of the tubular member in the circumferential direction of the tubular member. The sheath tube connecting member according to claim 1, which is formed.   A connection structure of a sheath pipe in which a water supply pipe is inserted and a concave portion rotating in the circumferential direction is formed on the outer peripheral surface, and a water faucet box for mutual connection of the water supply pipe and the water faucet, A cylindrical insertion portion that allows insertion of the sheath tube into the faucet box, and a circumferential wall of the insertion portion that is spaced from each other in the circumferential direction of the insertion portion. An elastically deformable locking claw projecting inward of the insertion portion, and a cylinder that allows insertion of the sheath tube and is inserted into the insertion portion to assist the fitting of the sheath tube into the insertion portion A concave portion that is locked to the locking claw in an inserted state of the cylindrical member into the insertion portion is formed on the outer peripheral surface of the cylindrical member. The inner peripheral surface is in front of the sleeve member to be engaged with the concave portion of the sheath tube when the sheath tube is inserted into the cylindrical member. Sheath pipe connection structure, wherein a projecting portion projecting inwardly of the cylindrical member from the inner peripheral surface is formed.   The concave portion of the sheath tube is formed so as to go around the sheath tube along a circumferential direction thereof, and the protruding portion extends on the inner circumferential surface of the tubular member in the circumferential direction of the tubular member. The sheath tube connection structure according to claim 3, wherein the sheath tube connection structure is formed. A sheath tube connection method using the sheath tube connection member according to claim 1,
Inserting the sheath tube into the cylindrical member, and engaging the protrusion formed on the inner peripheral surface of the cylindrical member with the recess formed on the outer peripheral surface of the sheath tube;
Inserting the cylindrical member into the insertion portion of the faucet box, and engaging a locking claw formed on the insertion portion with the recess formed on the outer peripheral surface of the cylindrical member;
A method for connecting a sheath tube, comprising:

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