JP2012220008A - Fitting structure, header unit and header - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a header configured such that if a header unit constituting the header is removed, signs thereof remain.SOLUTION: A fitting structure 10 includes a first tube body 80 and a second tube body 82 which are connected by a connection means 22. The first tube body 80 has a multilayer construction including an inner tube 18 having a first flow path 16 therein and an outer tube 46 surrounding the inner tube 18, and has one end defined as a connection tube portion 20 for use in connection from which the outer tube 46 is removed. The second tube body 82 has a second flow path 17 therein, and provided with the connection means 22 at the end portion, and the connection means 22 connects the connection tube portion 20. On this occasion, the first flow path 16 and the second flow path 17 are communicated. The first tube body 80 has a notch portion 36 which is formed by notching the outer tube 46 and receives the insertion of a tool moved along the inner tube 18 and releasing the connection of the connection means 22. A restriction means 38 projected from the outer tube 46 to the notch portion 36 to be easily cut off and preventing the insertion of the tool is provided to the notch portion 36.

Description

In the field of pipe joints, there has already been proposed a configuration that allows a pipe connected to a pipe joint to be removed on site (Patent Document 1).
Here, in Patent Document 1, along the surface of the pipe, a jig is inserted between the pipe and the cap of the coupling portion of the pipe joint, and the jig holds the pipe holding portion provided in the coupling portion. The pipe can be removed by releasing the holding. However, in a header in which a plurality of header bases each having a pipe holding part are connected, when the header base is removed from the header, the outer peripheral surface of each header base is covered with a resin cover (outer cylinder) without any gaps. A space for inserting a jig cannot be secured between the cap and the cap.

  Furthermore, when a header shipped with a plurality of header substrates connected at a factory is once disassembled on site and reassembled, the following problem is expected. That is, the factory ships after confirming the sealing performance by an airtight test or the like with the header assembled. This guarantees the quality of the header. However, when a leak occurs in the header once disassembled and reassembled at the site, it is difficult to determine whether the assembly at the site was incomplete or at the assembly stage at the factory.

JP 2010-190319 A

  In view of the above facts, an object of the present invention is to provide a joint structure, a header base, and a header that can be confirmed later when the header base constituting the header is removed.

  The joint structure according to the first aspect of the present invention has a multi-layer structure including an inner cylinder in which a first flow path is formed and an outer cylinder surrounding the inner cylinder. The inner cylinder from which the outer cylinder has been removed is connected to a first cylinder body that is a connection cylinder part for connection, and a second flow path is provided inside, and the end part is connected to the inserted connection cylinder part, A second cylinder provided with connecting means for communicating the first channel and the second channel, and the outer cylinder facing the second cylinder are cut out and moved along the inner cylinder. A notch portion into which a jig for releasing the connection of the connecting means is inserted, and a restricting means that protrudes from the outer cylinder to the notch portion so as to be excised and prevents insertion of the jig. It is a feature.

According to the first aspect of the present invention, the first cylinder and the second cylinder are connected by the connecting means, and the first flow path and the second flow path are communicated. At this time, a cutout portion having a size into which a jig is inserted is formed in the first cylinder having a multi-layer structure by cutting out the outer cylinder facing the second cylinder. The notch is provided with limiting means for preventing the jig from being inserted.
With the configuration described in claim 1, the connected first and second cylinders can be separated by the following procedure. That is, first, the limiting means provided in the cutout portion of the first cylinder is cut out, and a jig is inserted into the cutout portion. Next, the jig is moved in the axial direction along the inner cylinder. Thereby, the connection of the connection means of the second cylinder is released, and the first cylinder and the second cylinder can be separated.
In order to separate the first cylinder and the second cylinder, it is necessary to cut off the limiting means provided in the notch. For this reason, the state in which the restricting means is cut off can be used as a trace obtained by separating the first and second cylinders. That is, it can be confirmed that they are separated.
At this time, if the restricting means is greatly deformed even if it does not result in excision, since the trace of plastic deformation remains at the joint portion with the outer cylinder, the first cylinder and the second cylinder also in this case Can be a trace of separation.

  According to a second aspect of the present invention, in the joint structure according to the first aspect, the limiting means protrudes from an end surface of the notch in the axial direction of the first cylindrical body.

  According to the second aspect of the present invention, the restricting means protrudes from the end surface of the notch portion of the outer cylinder in the axial direction of the first cylinder, thereby preventing the jig from being inserted into the notch portion. For this reason, a jig | tool cannot be inserted in a notch part, unless a restriction | limiting means is excised. As a result, the state in which the restricting means is removed can be made a trace of separating the first cylinder and the second cylinder.

  According to a third aspect of the present invention, in the joint structure according to the first aspect, the limiting means protrudes from the end surface of the notch portion in the circumferential direction of the first cylindrical body.

  According to the third aspect of the present invention, the restricting means protrudes from the end surface of the notch portion of the outer cylinder in the circumferential direction of the first cylinder, thereby preventing the jig from being inserted into the notch portion. For this reason, a jig | tool cannot be inserted in a notch part, unless a restriction | limiting means is excised. As a result, the state in which the restricting means is removed can be made a trace of separating the first cylinder and the second cylinder.

  According to a fourth aspect of the present invention, in the joint structure according to the first aspect, the notch cuts the outer cylinder from both sides to the outer peripheral surface of the inner cylinder along a tangent line of the inner cylinder. The limiting means protrudes from the end surface of the notch in the axial direction of the first cylindrical body.

  According to the invention described in claim 4, the limiting means is provided in the axial direction of the first cylinder from the end surfaces of the notches on both sides of the outer cylinder, and prevents the jig from being inserted into the notches. . For this reason, a jig | tool cannot be inserted in a notch part, unless a restriction | limiting means is excised. As a result, the state in which the restricting means is removed can be made a trace of separating the first cylinder and the second cylinder.

  A header substrate according to a fifth aspect of the present invention has a multilayer structure of an inner cylinder having a flow path formed therein and an outer cylinder surrounding the inner cylinder, and is inserted into one end from the outside. The first connecting means for connecting the first connecting cylinder part is provided, and at the other end, the inner cylinder from which the outer cylinder has been removed is used as a second connecting cylinder part for connection. A branch cylinder having a branch flow channel communicating with the flow channel is formed from a peripheral wall by projecting in a radial direction, and the outer cylinder on the other end side being cut out, and the second connecting cylinder portion A notch part into which a jig for moving along the inner cylinder and releasing the connection of the second connection means is inserted when the second connection means is connected to the external second connection means, and the notch part from the outer cylinder And a restricting means that protrudes removably and prevents the jig from being inserted.

According to the fifth aspect of the present invention, the header base is connected to the first connecting cylinder part inserted from the outside by the first connecting means provided at one end, and the flow of the first connecting cylinder part is connected. The path and the flow path of the header base are communicated. Further, the second connecting cylinder portion formed at the other end is connected to the external second connecting means, and the flow path of the header base and the flow path of the second connecting means are communicated.
At this time, the cylindrical body is formed with a notched portion in which the outer cylinder is cut, and the notched portion is provided with a restricting means for preventing insertion of a jig for releasing the connection with the second connecting means. .
According to the configuration of the fifth aspect, after the second connecting cylinder portion is connected to the external second connecting means and the header is formed, the second connecting means and the second connecting cylinder portion can be separated. . At this time, in order to separate, it is necessary to cut out the limiting means provided in the notch, and the second connecting means and the second connecting cylinder portion are in a state where the limiting means is cut from the outer cylinder. Can be a trace of separation. That is, it can be confirmed that they are separated.
At this time, if the restricting means is greatly deformed without cutting, the trace of plastic deformation remains at the joint between the restricting means and the outer cylinder. Even in this case, the second connecting means and the second connecting means It can be set as the trace which separated the 2 connection cylinder part.

  According to a sixth aspect of the present invention, in the header base according to the fifth aspect, the limiting means projects from the end surface of the notch in the axial direction of the cylindrical body.

  According to the sixth aspect of the present invention, the restricting means protrudes from the end surface of the notch portion of the outer cylinder in the axial direction of the cylinder body, thereby preventing the jig from being inserted into the notch portion. For this reason, a jig | tool cannot be inserted in a notch part, unless a restriction | limiting means is excised. As a result, the state in which the restricting means is removed can be made a trace of separating the second connecting means and the second connecting cylinder portion.

  A seventh aspect of the present invention is the header base according to the fifth aspect, characterized in that the limiting means protrudes from the end surface of the notch portion in the circumferential direction of the cylindrical body.

  According to the seventh aspect of the present invention, the restricting means protrudes from the end surface of the notch portion of the outer cylinder in the circumferential direction of the cylindrical body, thereby preventing the jig from being inserted into the notch portion. For this reason, a jig | tool cannot be inserted in a notch part, unless a restriction | limiting means is excised. As a result, the state in which the restricting means is removed can be made a trace of separating the second connecting means and the second connecting cylinder portion.

  The invention according to claim 8 is the header substrate according to claim 5, wherein the notch cuts the outer cylinder from both sides to the outer peripheral surface of the inner cylinder along a tangent line of the inner cylinder. The limiting means protrudes from the end surface of the notch in the axial direction of the cylindrical body.

  According to the invention described in claim 8, the restricting means protrudes in the axial direction of the cylindrical body from the end surfaces of the notched portions on both sides of the outer cylinder, thereby preventing the jig from being inserted into the notched portions. For this reason, a jig | tool cannot be inserted in a notch part, unless a restriction | limiting means is excised. As a result, the state in which the restricting means is removed can be made a trace of separating the second connecting means and the second connecting cylinder portion.

The header according to the ninth aspect of the present invention has a multi-layer structure including an inner cylinder having a first flow path formed therein and an outer cylinder surrounding the inner cylinder, and is inserted into one end from the outside. The first connecting means for connecting the first connecting cylinder part is provided, and the other end part is a second connecting cylinder part from which the outer cylinder is removed. From the peripheral wall of the inner cylinder, A first header base body in which a branch cylinder having a branch channel communicating with one channel projects in a radial direction, an inner cylinder having a second channel formed therein, and an outer cylinder surrounding the inner cylinder; The second connecting means connected to the second connecting cylinder part is provided at one end, and the third connecting cylinder part from which the outer cylinder is removed is formed at the other end. A second header base body in which a branch cylinder having a branch channel communicating with the second channel is protruded in a radial direction on a peripheral wall of the inner cylinder; and the first header base Is formed by cutting a of the outer cylinder switch, and notches jig for releasing the coupling is inserted in the second connecting means is moved along said inner cylinder,
And a restricting means that protrudes from the outer cylinder to the notch so as to be cut out and prevents the jig from being inserted.

According to the ninth aspect of the invention, the first header base and the second header base are connected by the second connecting means, and the first flow path and the second flow path are communicated. At this time, a cutout portion into which a jig formed by removing the outer cylinder is inserted is formed in the first header base having a multilayer structure, and the insertion of the jig is prevented in the cutout portion. Limiting means are provided.
With the configuration described in claim 9, the connected first header base and second header base can be separated by the following procedure. That is, first, the limiting means provided in the notch portion of the first header base is cut out, and a jig is inserted into the notch portion. Next, the jig is moved in the axial direction along the inner cylinder of the first header base. Thereby, the connection of the connection means of the second header base is released, and the first header base and the second header base can be separated.
In order to separate the first header base and the second header base, it is necessary to cut out the limiting means provided in the notch. Thereby, the state in which the restricting means is cut off can be made a trace of separating the first header base and the second header base. That is, it can be confirmed that they are separated.
At this time, if the restricting means is greatly deformed without cutting, a trace of plastic deformation remains at the joint between the restricting means and the covering member. 2 It can be set as the trace which isolate | separated the header base | substrate.

  According to a tenth aspect of the present invention, in the header according to the ninth aspect, the limiting means protrudes from an end surface of the notch portion in an axial direction of the first header base.

  According to the invention described in claim 10, the restricting means protrudes from the end surface of the notch portion of the outer cylinder in the axial direction of the cylinder body, thereby preventing the jig from being inserted into the notch portion. For this reason, a jig | tool cannot be inserted in a notch part, unless a restriction | limiting means is excised. As a result, the state in which the restricting means is removed can be a trace of the separation of the first header base and the second header base.

  The invention described in claim 11 is characterized in that, in the header described in claim 9, the limiting means protrudes from the end surface of the notch portion in the circumferential direction of the first header base.

  According to the eleventh aspect of the present invention, the restricting means is provided in the circumferential direction of the cylindrical body from the end face of the notched portion of the outer cylinder, and prevents the jig from being inserted into the notched portion. For this reason, a jig | tool cannot be inserted in a notch part, unless a restriction | limiting means is excised. As a result, the state in which the restricting means is removed can be a trace of the separation of the first header base and the second header base.

  According to a twelfth aspect of the present invention, in the header according to the ninth aspect, the notch cuts the outer cylinder from both sides to the outer peripheral surface of the inner cylinder along a tangent line of the inner cylinder. The limiting means is formed so as to protrude from the end face of the notch portion in the axial direction of the first header base.

  According to the twelfth aspect of the present invention, the restricting means protrudes in the axial direction of the cylindrical body from the end surfaces of the notched portions on both sides of the outer cylinder, thereby preventing the jig from being inserted into the notched portions. For this reason, a jig | tool cannot be inserted in a notch part, unless a restriction | limiting means is excised. As a result, the state in which the restricting means is removed can be a trace of the separation of the first header base and the second header base.

  Since the present invention is configured as described above, it is possible to provide a joint structure, a header base, and a header that can be confirmed later when the header base constituting the header is removed.

It is sectional drawing which shows the basic composition of the joint structure which concerns on the 1st Embodiment of this invention. It is an external appearance perspective view which shows the structure of the notch part which concerns on the 1st Embodiment of this invention. It is an external appearance perspective view which shows the cancellation | release procedure of the joint structure which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows the cancellation | release procedure of the joint structure which concerns on the 1st Embodiment of this invention. It is an external appearance perspective view which shows the structure of the notch part which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the structure of the notch part which concerns on the 3rd Embodiment of this invention. It is an external appearance perspective view which shows the cancellation | release procedure of the joint structure which concerns on the 3rd Embodiment of this invention. It is sectional drawing which shows the basic composition of the joint structure which concerns on the 4th Embodiment of this invention. It is a fragmentary sectional view which shows the basic composition of the header base | substrate which concerns on the 5th Embodiment of this invention. It is an external appearance perspective view which shows the structure of the header which concerns on the 6th Embodiment of this invention. It is a fragmentary sectional view which shows the connection procedure of the header which concerns on the 6th Embodiment of this invention.

(First embodiment)
As shown in FIG. 1, the joint structure 10 according to the first embodiment of the present invention includes a first pipe 80 and a second pipe 82, and the first pipe 80 and the second pipe 82 are the one-touch joint 22. It is connected.
The first pipe 80 has a double-pipe structure (multi-layer configuration) of an inner cylinder 18 in which the first flow path 16 is formed and an outer cylinder 46 surrounding the inner cylinder 18. Here, the inner cylinder 18 is molded from a heat-resistant resin material or metal material, and the outer cylinder 46 is formed from a resin material. On the other hand, the outer cylinder 46 has one or more roles of reinforcing the inner cylinder 18, protecting it, keeping warm, and improving aesthetics.

A cylindrical portion 20 is formed at the end of the first pipe 80. The cylindrical portion 20 is a portion inserted into the one-touch joint 22 and is provided within a range of a length L1 from the distal end portion of the first pipe 80. The outer cylinder 46 is removed from the range of the cylindrical portion 20.
The second pipe 82 has the second flow path 17 formed therein, and an end portion is formed with a diameter-expanded portion 84 whose inner diameter is increased to a diameter into which the tube portion 20 of the inner cylinder 18 is inserted. . The one-touch joint 22 that connects the inserted cylindrical portion 20 is configured using the enlarged diameter portion 84.

  The one-touch joint 22 has a holding cylinder 28 disposed on the inner peripheral surface of the enlarged diameter portion 84. The holding cylinder 28 is formed in a cylindrical shape with resin and surrounds the outer peripheral surface of the cylinder part 20 inserted in the direction of the arrow D1. A plurality of slits (not shown) are provided in the direction of the axis 32 in the cylindrical portion of the holding cylinder 28. The slit is cut out from one end portion 28E of the holding cylinder 28 to a position beyond the central portion of the cylindrical portion. Thereby, the holding cylinder 28 can be expanded in the radial direction. Further, a claw portion 29 is provided in a ring shape on the cylindrical portion of the holding cylinder 28.

The claw portion 29 is embedded in the cylindrical portion of the holding cylinder 28 in the circumferential direction, and is divided by a slit portion. Thereby, the diameter of the claw portion 29 can be increased in conjunction with the diameter increase of the holding cylinder 28.
The claw portion 29 is disposed so as to be inclined in a direction in which the diameter decreases in the direction of the arrow D <b> 1, and the tip of the claw portion 29 protrudes from the inner peripheral surface of the holding cylinder 28. Thereby, the nail | claw part 29 accept | permits that the cylinder part 20 is inserted in the arrow D1 direction, and surrounds and hold | maintains the outer peripheral surface of the inserted cylinder part 20. As shown in FIG. Moreover, it is prevented that the cylinder part 20 moves to the direction (arrow D2 direction) which pulls out. Thereby, the connection state of the 1st pipe 80 and the 2nd pipe 82 is maintained.

  An open cylinder part 30 is disposed between the holding cylinder 28 and the enlarged part 84. The open cylinder part 30 is formed in a cylindrical shape, and surrounds the outer peripheral surface of the holding cylinder 28 by the cylinder part. A folded portion 30S is formed at the end of the open cylinder portion 30 on the arrow D2 side, and the folded portion 30S is in contact with the distal end portion 84S of the enlarged portion 84. Thereby, the movement to the arrow D1 direction of the open cylinder part 30 is controlled. An end portion 30E on the arrow D1 side of the open cylinder portion 30 is provided with an inclined portion 31 having an inclination that expands in the direction of the arrow D1. The length of the inclined portion 31 in the direction of the axis 32 is L2.

  The tip of the inclined portion 31 is in contact with the end 28E in the direction of arrow D1 of the holding cylinder 28. When the holding cylinder 28 is moved by the distance L2 in the direction of arrow D1, the end 28E of the holding cylinder 28 is The diameter is increased by riding on the inclined portion 31. At this time, since the slit is provided on the cylindrical portion 28E side of the holding cylindrical body 28, the diameter of the cylindrical portion and the claw portion 29 is easily expanded. As a result, the distance between the opposing claw portions 29 is widened, the holding of the cylindrical portion 20 is released, and the first pipe 80 and the second pipe 82 can be separated.

  Further, the outer peripheral surface of the enlarged portion 84 and the distal end portion 84S are surrounded by the cap 34. The cap 34 is made of resin (for example, polyacetal resin or glass fiber reinforced nylon), and is fitted into the outer peripheral surface of the enlarged portion 84 so as to be rotatable in the circumferential direction. For this reason, at least a part of each of the holding cylinder body 28, the open cylinder part 30, and the inserted cylinder part 20 is surrounded by the cap 34, and the radial movement of the holding cylinder body 28 and the open cylinder part 30; Movement in the direction of the axis 32 is restricted. The cap 34 may be attached by a screwing method in which a male screw provided in the enlarged portion 84 and a female screw provided in the cap 34 are screwed together.

Note that an end portion 28 </ b> S in the direction of the arrow D <b> 2 of the holding cylinder body 28 extends along the outer peripheral surface of the cylinder portion 20 and enters a gap between the cylinder portion 20 and the cap 34. The extended tip 28S of the holding cylinder 28 is substantially flush with the tip 34S of the cap 34.
An O-ring 52 that prevents water leakage from between the enlarged diameter portion 84 at the tip of the second pipe 82 and the cylindrical portion 20 is fitted in the direction of the arrow D1 of the open cylindrical portion 30.

Next, the notch will be described.
As shown in the external perspective view of the joint structure in FIG. 2, a notch 36 is formed at the end of the outer tube 46 of the first pipe 80. Here, FIG. 2B is a view seen from the direction of the arrow R shown in FIG.
Here, the notch 36 is formed by notching the end of the outer cylinder 46 on the one-touch joint 22 side. The notch portion 36 has a size necessary for inserting a jig for releasing the connection of the claw portion 29 that connects the cylindrical portion 20. The jig will be described later. The notch 36 has a circumferential end face 54 cut in the circumferential direction and an axial end face 56 cut in the direction of the axis 32, and the inner cylinder 18 is provided inside the notch 36. Is exposed.

  A rib 38 protrudes from a substantially central portion of the circumferential end surface 54 of the notch 36 in a direction parallel to the axis 32. The rib 38 has a plate shape and is formed with a length substantially the same as the length of the notch 36 in the direction of the axis 32. A part of the plate thickness is made thin so that the joint portion 38A with the circumferential end surface 54 of the rib 38 can be easily cut.

By setting it as the structure of this Embodiment, the 1st pipe 80 and the 2nd pipe 82 which were connected by the one-touch coupling 22 can be isolate | separated in the following procedure.
As shown in the separation procedure of FIGS. 3 and 4, the first pipe 80 and the second pipe 82 are separated using a dedicated jig 40.

  First, the jig 40 will be described. The jig 40 has a curved portion 42 having a curved surface that covers the outer peripheral surface over substantially a half circumference (length S1 along the curved surface) of the cylindrical portion 20. The length of the bending portion 42 in the direction of the axis 32 is H1. The jig 40 has a flange 44 that is bent in the radial direction from the end of the curved portion 42. The collar portion 44 serves as a knob when the bending portion 42 is inserted.

The notch 36 has a circumferential length S2 that is greater than the circumferential length S1 of the bending portion 42 of the jig 40, and a length H2 that is greater than the length H1 of the bending portion 42 in the axis 32 direction. The tube 46 is formed by cutting the end portion on the tube portion 20 side. Thereby, the bending portion 42 of the jig 40 can be inserted into the notch 36 and the bending portion 42 can be brought into contact with the surface of the notch 36.
A rib 38 projects from the notch 36. The rib 38 protrudes from a substantially central portion of the circumferential end surface 54. For this reason, the distance from the side surface of the rib 38 to the axial end surface 56 of the notch 36 is smaller than the circumferential width S <b> 1 of the bending portion 42. As a result, the bending portion 42 of the jig 40 cannot be inserted into the gap between the ribs 38.

  Therefore, in the separation procedure, first, the rib 38 provided in the notch 36 is cut out, and the jig 40 is inserted into the notch 36 (see FIGS. 3A, 4A, and 4B). ). Here, the rib 38 can be easily cut at the position of the joint portion 38A because the joint portion 38A of the rib 38 with the outer tube 46 is thinned.

Next, the jig 40 is moved in the axial direction along the cylindrical portion 20. That is, the bending portion 42 is inserted between the cap 34 and the cylindrical portion 20, and the tip 28S of the holding cylinder 28 is pushed in the direction of the arrow D1 along the surface of the inner cylinder 18 (FIG. 3B, FIG. 4 (c)). Thereby, the holding cylinder 28 can be moved in the direction of the arrow D1. By moving the holding cylinder 28, as described above, the end 28E of the holding cylinder 28 rides on the inclined portion 31 of the open cylinder 30, and the end 28E and the claw 29 of the holding cylinder 28 are expanded in diameter. Then, the holding of the claw portion 29 is released.
Thereby, holding | maintenance of the holding | maintenance part 28 provided in the connection means of the 2nd pipe 82 is cancelled | released, and the 1st pipe 80 and the 2nd pipe 82 can be isolate | separated.

As described above, according to the present embodiment, the connected first pipe 80 and second pipe 82 can be removed and reassembled, for example, at the site. At this time, in order to remove, it is necessary to cut out the rib 38 provided in the notch 36. When the rib 38 is cut out, the trace of separating the first pipe 80 and the second pipe 82 can do.
Even if the ribs 38 are not cut off, if the ribs 38 are greatly deformed, traces of plastic deformation remain at the joints with the outer cylinder 46. Even in this case, the first pipe 80 and the first pipe It can be set as the trace which separated the 2 pipes 82.

The first pipe 80 has been described with respect to the double tube structure of the inner cylinder 18 and the outer cylinder 46. However, the structure is not limited to this, and a structure of a triple tube or more including an intermediate tube between the inner tube 18 and the outer tube 46 may be used. Furthermore, a single tube configuration in which the inner cylinder 18 and the outer cylinder 46 are integrally molded may be used. Thereby, the effect similar to the case of a double tube structure can be acquired.

(Second Embodiment)
As shown in FIG. 5, the joint structure 60 according to the second embodiment includes a first pipe 80 and a second pipe 82, and the first pipe 80 and the second pipe 82 are connected by the one-touch joint 22. Yes. The first pipe 80 is provided with a notch 37 having substantially the same dimensions at the same position as the notch 36 described in the first embodiment. A rib 62 projects from one axial end surface 57 of the notch 37 toward the other axial end surface 57 (toward the circumferential direction).

The rib 62 has a flat plate shape and covers the outer peripheral surface of the inner cylinder 18 with the same radial height as the outer cylinder 46. The rib 62 has a reduced thickness at the joint portion 62A with the axial end surface 56, and can be easily excised. Further, the rib 62 is provided in the vicinity of the center portion of the axial end surface 56, and the gap portion between the rib 62 and the notch 36 is the length H1 in the axial direction of the jig 40 described in the first embodiment. The bending portion 42 of the jig 40 cannot be inserted.
One end of the rib 62 may have a length up to the middle without reaching the other axial end surface 57.

With such a configuration, in order to insert the curved portion 42 of the jig 40 described in the first embodiment into the notch portion 37, it is necessary to cut the rib 62 from the notch portion 37. As a result, when the rib 62 is cut away, it can be a trace separated from the first pipe 80.
Other configurations are the same as those of the first embodiment, and a description thereof will be omitted.

(Third embodiment)
As shown in FIGS. 6 and 7, the joint structure 70 according to the third embodiment includes a first pipe 80 and a second pipe 82, and the first pipe 80 and the second pipe 82 are connected by the one-touch joint 22. Has been. The first pipe is provided with a notch 72. Here, FIG. 6A is a cross-sectional view of the notch, and FIG. 6B is a plan view of the jig. 7A is a perspective view of the notch, FIG. 7B is a perspective view of the jig, and FIG. 7C is a view of the jig inserted into the notch. is there.

The notch 72 is formed by cutting the outer cylinder 46 of the first pipe 80 from both sides to the outer peripheral surface of the inner cylinder 18 along the tangent line 58 of the inner cylinder 18. Thereby, the notch part 72 is formed in two places which oppose on both sides of the inner cylinder 18. FIG. The notch 72 has a dimension H4 that exceeds a length H3 in the axial direction of a curved portion 77 of a U-shaped jig 76, which will be described later.
The two ribs 74 protrude in the direction of the axis 32 from the end surface of the outer cylinder 46 of the notch 72.

Here, the jig 76 has two curved portions 77 having curved surfaces along the outer peripheral surface of the cylindrical portion 20, and the curved portion 77 has a flange portion that is bent in the radial direction from the end portion of the curved portion 77. 78 is provided. An end portion of the flange portion 78 extends along the notch portion 72 and is integrated in a U shape in plan view.
The jig 76 is inserted into the cutout portion 72 from which the rib 74 is cut, and the bending portion 77 is inserted between the cap 34 described in the first embodiment and the inner cylinder 18 to hold the holding cylinder. Press 28 down. Thereby, the 1st pipe 80 and the 2nd pipe 82 are separable.

With such a configuration, it is necessary to remove the rib 74 in order to insert the jig 76 into the cutout portion 72. When the rib 74 is cut off, the first pipe and the second pipe are separated. Can be traces made.
Other configurations are the same as those of the first embodiment, and a description thereof will be omitted.

(Fourth embodiment)
As shown in FIG. 8, the joint structure 90 according to the fourth embodiment includes a first pipe 80 and a third pipe 92, and the first pipe 80 and the third pipe 92 are connected by the one-touch joint 23. Yes. The first pipe 80 has already been described in the first embodiment, and a description thereof will be omitted.

Here, the third pipe 92 has a third flow path 94 inside, and a one-touch joint 23 is provided at the tip. A reduced diameter portion 85 with a reduced tube diameter is provided at the tip of the third pipe 92, and the one-touch joint 23 is configured using the reduced diameter portion 85.
The cylindrical portion 20 of the first pipe 80 described in the first embodiment is inserted outside the reduced diameter portion 85. An O-ring 52 is provided between the reduced diameter portion 85 and the cylindrical portion 20 to prevent water leakage. Thereby, the first flow path 16 of the first pipe 80 described in the first embodiment and the third flow path 94 are communicated.

The one-touch joint 23 has a configuration in which the holding cylinder body 28 of the one-touch joint 22 described in the first embodiment is divided into two parts, an annular holding ring 64 and an opening ring 66. Here, the holding ring 64 has a cross-sectionally bent shape, and the inner peripheral surface side is inclined in the direction of the arrow D1. Further, the front end of the holding ring 64 is in contact with the outer peripheral surface of the cylindrical portion 20. Thereby, the cylinder part 20 is hold | maintained at the front-end | tip of the holding ring 64, and the removal of the cylinder part 20 is prevented.

The release ring 66 is formed in a cylindrical shape, and is provided on the side surface of the holding ring 64 on the insertion port side (the direction of the arrow D2). An end of the opening ring 66 on the holding ring 64 side has an inclined portion that comes into contact with the inclined surface of the opening ring 66. A transparent cover 68 that surrounds the cylindrical portion 20 and the reduced diameter portion 85 is provided on the arrow D1 side of the holding ring 64. At this time, the inclined portion of the tip of the transparent cover 68 and the inclined portion of the holding ring 64 are in contact with each other.
A cap 35 is provided so as to surround the outer periphery of the transparent cover 68, the holding ring 64, and the opening ring 66. Thereby, the radial movement of the transparent cover 68, the holding ring 64, and the opening ring 66 is restricted.

With this configuration, the holding ring 64 is moved along the inclined portion of the tip of the transparent cover 68 by moving the tip 66S of the opening ring 66 in the direction of the arrow D1 with a jig. Can do. Thereby, the diameter of the holding ring 64 is expanded. As a result, the holding of the cylindrical portion 20 of the holding ring 64 is released, and the cylindrical portion 20 can be removed.
Other configurations are basically the same as those in the first embodiment, and a description thereof will be omitted.

(Fifth embodiment)
As shown in FIG. 9, the header base 11 according to the fifth embodiment includes the first pipe 80 described in the first embodiment. That is, the first pipe 80 has a double cylinder configuration of an inner cylinder 18 in which the flow path 16 is formed and an outer cylinder 46 surrounding the inner cylinder 18. Further, a connecting cylinder part 20 from which the outer cylinder 46 is removed with a width L1 is formed at one end of the first pipe 80.
The other end of the first pipe 80 is provided with a one-touch joint 22a that is connected to a cylindrical portion (not shown) inserted from the outside. The one-touch joint 22a has the same configuration as the one-touch joint 22 described in the first embodiment, and a description thereof is omitted.

On the peripheral wall of the inner cylinder 18 of the first pipe 80, a branch pipe 24 having a branch flow path 25 communicating with the first flow path 16 projects in the radial direction. A one-touch joint 26 that connects the branch pipe 24 and a pipe (not shown) is provided at the tip of the branch pipe 24.

By configuring the header base as described above, the cylindrical portion 20 of the header base 11 is connected to a one-touch joint of another header base having a branch flow path (not shown), thereby providing a plurality of branch flow paths. A header can be provided.
Also. By connecting a tubular portion of another header base (not shown) to the one-touch joint 22a of the header base 11, a header having a plurality of branch channels can be provided.

  In addition, the notch part and the rib of the header base | substrate 11 demonstrated on the assumption of the notch part 36 and the rib 38 which are shown in 1st Embodiment. However, the present invention is not limited to this, and may be the notch portion 37 and the rib 62 described in the second embodiment, or the notch portion 72 and the rib 72 described in the third embodiment. In addition, the one-touch joint 22 shown in the first embodiment has been described as the connecting means, but the present invention is not limited to this, and the one-touch joint 23 described in the fourth embodiment may be used.

(Sixth embodiment)
As shown in FIG. 10, the header 12 according to the sixth embodiment of the present invention has a first header base 13 and a second header base 14, and the first header base 13 and the second header base 14 are They are connected by a one-touch joint 22b. Here, each of the first header base 13 and the second header base 14 has the same configuration as the header base 11 described in the fifth embodiment. For convenience of explanation, the first header base 13 will be described with the suffix a, and the second header base 14 will be appended with the suffix b.

  That is, as shown in FIG. 11, the first header base 13 and the second header base 14 are connected by inserting the cylindrical portion 20a of the first header base 13 into the one-touch joint 22b of the second header base 13. . Each component has already been described in the fifth embodiment, and detailed description thereof is omitted.

A pipe 50 connected to a heat source machine or the like (not shown) is inserted and fixed to the one-touch joint 22a of the first header base 13. Thereby, the header 12 and the pipe 50 can be communicated, and water or hot water can flow in the direction of the arrow W1 or the arrow W2.
In addition, you may connect the cylinder part of the elbow base | substrate in which the other header base | substrate and the bending part which are not shown in figure were formed in the one-touch coupling 22a. Thereby, the number of branch flow paths of the header can be increased.

Further, the cylindrical portion 20b of the second header base 14 is inserted into a one-touch joint 22c of an elbow base on which another header base or a bent portion is formed. Thereby, the number of branch flow paths of the header can be increased.
In addition, the cylinder part 20b may be inserted in the one-touch coupling of the pipe which is not shown in figure connected with the heat source machine etc. Thereby, it can connect with the heat source machine etc. which are not illustrated.

With the header configuration described above, the jig 40 described in the first embodiment can be inserted by cutting away the rib 38a of the notch 36a of the first header base 13. Thereby, joining with the 2nd header base | substrate 14 can be cancelled | released. At this time, in order to remove, it is necessary to cut away the rib 38a provided in the notch 36a. When the rib 38a is cut off, the first header base 13 and the second header base 14 are separated. Can be traces.

Even if the rib 38a is not cut off, if the rib 38a is greatly deformed, traces of plastic deformation remain at the joint with the outer cylinder 46a. The second header base 14 can be a separated trace.

  In addition, the notch part and rib of the 1st header base | substrate 13 and the 2nd header base | substrate 14 demonstrated on the assumption of the notch part 36 and the rib 38 which are shown in 1st Embodiment. However, the present invention is not limited to this, and may be the notch portion 37 and the rib 62 described in the second embodiment, or the notch portion 72 and the rib 74 described in the third embodiment. In addition, the one-touch joint 22 shown in the first embodiment has been described as the connecting means, but the present invention is not limited to this, and the one-touch joint 23 described in the fourth embodiment may be used. Furthermore, any joint may be used as long as the connection can be released by inserting a jig.

DESCRIPTION OF SYMBOLS 10 Joint structure 11 Header base body 12 Header 13 1st header base body 14 2nd header base body 16 Flow path (1st flow path)
17 channel (second channel)
18 Inner cylinder 20 Cylinder part (connecting cylinder part)
22 One-touch fitting (connecting means)
24 branch pipe 36 notch 37 notch 38 rib (limitation means)
40 Jig 46 Outer cylinder 80 First pipe (first cylinder)
82 Second pipe (second cylinder)

Claims (12)

The inner cylinder in which the first flow path is formed and the outer cylinder surrounding the inner cylinder are formed in a multilayer structure, and the inner cylinder from which the outer cylinder is removed is connected to one end portion. A first cylinder that is a connecting cylinder;
A second cylinder provided with a connecting means for providing a second flow path inside, connected to the connecting cylinder portion inserted at the end, and communicating the first flow path and the second flow path;
A notch portion formed by cutting out the outer cylinder facing the second cylinder, into which a jig for moving along the inner cylinder and releasing the connection of the connecting means is inserted;
Limiting means that protrudes from the outer cylinder to the notch so as to be excised and prevents insertion of the jig,
A joint structure having   2. The joint structure according to claim 1, wherein the limiting means protrudes from an end surface of the notch portion in an axial direction of the first cylindrical body.   2. The joint structure according to claim 1, wherein the limiting means protrudes from an end surface of the notch portion in a circumferential direction of the first cylindrical body.   The notch is formed by cutting the outer cylinder from both sides to the outer peripheral surface of the inner cylinder along a tangent line of the inner cylinder, and the restricting means is formed from the end surface of the notch, respectively. The joint structure according to claim 1, wherein the joint structure projects in the axial direction of the cylindrical body. First connecting means for connecting a first connecting tube portion inserted from the outside to one end portion, having a multi-layer structure of an inner tube having a flow path formed therein and an outer tube surrounding the inner tube The other end of the inner cylinder from which the outer cylinder has been removed is a second connecting cylinder for connection, and a branch channel that communicates with the channel from the peripheral wall of the inner cylinder. A cylindrical body in which the provided branch cylinder projects in the radial direction;
It is formed by cutting out the outer cylinder on the other end side, and when the second connecting cylinder part is connected to an external second connecting means, it is moved along the inner cylinder to connect the second connecting means A notch into which a jig for releasing is inserted,
Limiting means that protrudes from the outer cylinder to the notch so as to be excised and prevents insertion of the jig,
A header substrate.   The header base according to claim 5, wherein the limiting means protrudes in an axial direction of the cylindrical body from an end surface of the notch.   The header base according to claim 5, wherein the limiting means protrudes from an end surface of the notch portion in a circumferential direction of the cylindrical body.   The notch is formed by cutting the outer cylinder from both sides to the outer peripheral surface of the inner cylinder along the tangent line of the inner cylinder, and the restricting means is respectively formed from the end surface of the notch to the cylinder. The header base body according to claim 5, wherein the header base body projects in the axial direction of the body. The inner cylinder in which the first flow path is formed and the outer cylinder surrounding the inner cylinder have a multi-layer structure, and a first connecting cylinder portion inserted from the outside is connected to one end portion of the first cylinder. A connecting means is provided, and the other end portion is a second connecting cylinder portion from which the outer cylinder is removed, and a branch channel that communicates with the first channel is provided from the peripheral wall of the inner cylinder. A first header base body in which the branch cylinder projects in the radial direction;
The inner cylinder in which the second flow path is formed and the outer cylinder surrounding the inner cylinder are formed in a multilayer structure, and one end portion has a second connecting means connected to the second connecting cylinder portion. A third connecting cylinder part is formed, the outer cylinder is removed from the other end, and a branch cylinder having a branch channel communicating with the second channel is formed on the peripheral wall of the inner cylinder. A second header base projecting in a direction;
A notch portion formed by cutting out the outer cylinder of the first header base body, and a jig for moving the inner cylinder along the inner cylinder to release the connection of the second connecting means;
Limiting means that protrudes from the outer cylinder to the notch so as to be excised and prevents insertion of the jig,
With header.   The header according to claim 9, wherein the limiting means protrudes in an axial direction of the first header base from an end surface of the notch.   The header according to claim 9, wherein the limiting means protrudes from an end surface of the notch portion in a circumferential direction of the first header base.   The notch is formed by cutting the outer cylinder from both sides to the outer peripheral surface of the inner cylinder along a tangent line of the inner cylinder, and the restricting means are respectively formed from the end surface of the notch. The header according to claim 9, wherein the header projects in the axial direction of the header base.

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