WO2019220604A1

WO2019220604A1 - Holding structure of pipe member, end closure tool, and connection tool

Info

Publication number: WO2019220604A1
Application number: PCT/JP2018/019196
Authority: WO
Inventors: 晴也溜渕
Original assignee: ミライアル株式会社
Priority date: 2018-05-17
Filing date: 2018-05-17
Publication date: 2019-11-21

Abstract

This holding structure (1) of a pipe member is provided with: a housing (2) which is a structure for holding a resin pipe member (61), and in which an internal space (2a) is formed; an insertion member (3) which has a through-hole (3a) for passage of the resin pipe member (61) and which is inserted into the housing (2) while being fitted in the housing (2) by means of a screw; and a tubular elastic member (4) which is arranged inside of the internal space (2a) of the housing (2) and which, on the inside, receives the resin pipe member (61), which has passed through the through-hole (3a) of the insertion member (3). The holding structure is configured such that the insertion member (3), when inserted into the housing (2), axially pressurizes the tubular elastic member (4) inside of the internal space (2a) and deforms this elastically inwards, pressing the resin pipe member (61) from the outer peripheral side.

Description

Piping member holding structure, end seal and connector

TECHNICAL FIELD The present invention relates to a piping member holding structure for holding a resin piping member, and an end sealing tool and a connecting tool having the piping member holding structure, and particularly suppresses the occurrence of damage to the resin piping member. However, the technique which can hold | maintain resin piping members effectively is proposed.

Resin piping such as chemical transport lines used in various industries is configured by combining a plurality of resin piping members including a resin tube member made of a thermoplastic resin or other resin material and a resin pipe joint. .

In this type of resin piping, for example, in order to prevent a liquid or gas flowing inside during use from leaking and causing a serious problem, the resin piping members themselves constituting the resin piping and their ends There may be a test to confirm the liquid-tightness or air-tightness of the connection part between parts.

Heretofore, in order to perform the above test, a so-called one-touch joint or a flare-type or sleeve-type mechanical joint is connected to a resin piping member, and the resin piping member is held by these joints. The end of the piping member was sealed or the two resin piping members were connected to each other.

However, in one-touch joints and mechanical joints, a metal fitting that can be referred to as a lock crow or a lock ring that touches the resin pipe member in order to hold the resin pipe member is used to connect the contact portion of the resin pipe member. There is a problem of damage or significant deformation.

In this case, after the test, it is necessary to cut and remove the part of the resin piping member that has been damaged or greatly deformed, so that it is necessary to readjust the dimensions after cutting. In addition to the time required for the work, a long resin piping member must be prepared in advance in anticipation of the cutting.
In particular, when a flare-type or sleeve-type mechanical joint is used, the heat treatment to a predetermined portion of the resin piping member and flare processing or sleeve press-fitting processing result in an increase in working time. Such processing can also cause contamination of the internal flow path of the piping.

In addition, as a technique regarding the connection part of piping etc., there exist some which were described in patent documents 1-4, for example.

Japanese Utility Model Publication No. 4-8885 Japanese Patent No. 4227975 JP 2001-141143 A JP 2000-170966 A

This invention makes it a subject to solve the above problems, and the objective is to hold | maintain the resin-made piping member effectively, suppressing generation | occurrence | production of the damage etc. to the resin-made piping member. An object of the present invention is to provide a holding structure for a piping member, an end seal and a connector.

The holding structure for a piping member according to the present invention is a structure for holding a resin piping member, has a housing in which an internal space is formed, a through hole through which the resin piping member passes, and is fitted into the housing by a screw. An insertion member that is inserted into the housing, and a cylindrical elastic member that is disposed in the internal space of the housing and that receives the resin piping member that has passed through the through-hole of the insertion member. The cylindrical elastic member is pressed in the axial direction in the internal space by the insertion member inserted into the inside and elastically deformed inward, and is configured to press the resin piping member from the outer peripheral side. .

In the piping member holding structure according to the present invention, it is preferable that the inner surface of the inner space of the housing has a shape that follows the outer peripheral surface of the cylindrical elastic member.
In the piping member holding structure according to the present invention, it is preferable that the bottom surface of the internal space of the housing has a shape that follows the other end surface of the cylindrical elastic member opposite to the one end surface pressed by the insertion member. .

In the holding structure for a piping member according to the present invention, the bottom surface of the internal space of the housing is in a holding state of the resin piping member, and the other end surface of the cylindrical elastic member is opposite to the one end surface pressed by the insertion member. It is preferable to contact the whole.
In the holding structure for a piping member of the present invention, it is preferable that the entire inner peripheral surface of the cylindrical elastic member is in contact with the outer peripheral surface of the resin piping member while the resin piping member is held.
In the piping member holding structure according to the present invention, it is preferable that the tubular elastic member is filled in the internal space of the housing while the resin piping member is held.

The cylindrical elastic member preferably has a cylindrical shape and is made of a rubber material or an elastomer material.
On the other hand, the housing and the insertion member are preferably each made of a resin material.

In the holding structure for a piping member according to the present invention, more specifically, the housing includes an exterior part in which the internal space is formed, and the exterior part opens to receive the insertion member; and the reception end A female screw part formed on at least a part of the inner surface of the exterior part from the first part to the inner space, and the insertion member is provided around the through hole with the female thread part of the outer part of the housing. It is preferable to have a male screw part fitted to the male screw part and a pressurizing tip part which is formed on the tip side in the axial direction from the male screw part and comes into contact with the cylindrical elastic member.
In this case, it is preferable that at least one of the pressure front end portion and the bottom surface of the internal space of the housing has a tapered surface that is inclined in a direction protruding in the axial direction toward the outer peripheral side.

An end seal of a piping member according to the present invention has any one of the above-described holding structures for a piping member, and a stopper deeper than the internal space of the housing prevents further progress of the resin piping member. It is blocked by the wall.

The pipe member connector according to the present invention has a first holding structure and a second holding structure for a piping member, and each of the first holding structure and the second holding structure is a holding structure for any one of the piping members described above. The first holding structure and the second holding structure are connected to each other at the end of each housing opposite to the side where the insertion member is inserted, and the first holding structure and A communication passage that connects the insides of the respective housings is formed deeper than the internal space of each housing of the second holding structure.

According to this invention, the cylindrical elastic member is pressed in the axial direction within the internal space by the insertion member inserted into the housing and elastically deformed inward, and the resin piping member is pressed from the outer peripheral side. By attaching, the resin piping member can be effectively held while suppressing the occurrence of damage to the resin piping member.

It is the top view and longitudinal cross-sectional view which show the edge part sealing tool of the piping member which has the holding structure of the piping member which concerns on one Embodiment of this invention. It is a perspective view of the edge part sealing tool of FIG. It is a longitudinal cross-sectional view which decomposes | disassembles and shows the holding structure which the edge part sealing tool of FIG. 1 has. It is a longitudinal cross-sectional view which shows the modification of the holding structure which the edge part sealing tool of FIG. 1 has. It is the top view and longitudinal cross-sectional view which show the connection member of the piping member which has the holding structure of the piping member which concerns on other embodiment of this invention. It is a perspective view of the connection tool of FIG. FIG. 6 is a transparent perspective view of the connector of FIG. 5. It is a figure which shows the state of the edge part of the resin-made tube members after attaching the one-touch coupling of a comparative example. It is a figure which shows the state of the edge part of the resin-made tube members after attaching the edge part sealing tool of an Example.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The piping member holding structure 1 illustrated in FIGS. 1 and 2 holds, for example, a resin tube member 61 and other resin piping members 61. As shown in the exploded view of FIG. The housing 2 in which the space 2a is formed, the through-hole 3a through which the resin piping member 61 passes, the insertion member 3 inserted into the housing 2 while being fitted to the housing 2 by screws, and the interior of the housing 2 The cylindrical elastic member 4 which is arrange | positioned in the space 2a and receives the resin-made piping members 61 which passed the through-hole 3a of the insertion member 3 is provided inside.

In such a holding structure 1, the cylindrical elastic member 4 disposed in the internal space 2 a of the housing 2 is inserted in the axial direction that is the direction of the central axis C by the insertion member 3 that is inserted while being screwed into the housing 2. By being pressurized, it is pressed against the bottom surface 2b of the internal space 2a of the housing 2, but it loses the escape space in the internal space 2a and is elastically deformed inward. Thereby, as shown in FIG. 1, the resin piping member 61 positioned inside the cylindrical elastic member 4 is pressed from the outer peripheral side by the cylindrical elastic member 4 elastically deformed on the outer peripheral side, and is held there. Will be.

According to this, the resin-made piping member 61 is not in contact with the metal fittings such as the one-touch joint and the lock joint of the mechanical joint described above, but is in contact with the elastically deformable cylindrical elastic member 4, and the cylindrical elastic member 4 Since it is pressed from the side, the resin piping member 61 can be effectively held while suppressing the occurrence of damage to the resin piping member 61.

The resin piping member 61 is, for example, a resin tube having a straight or curved straight or curved pipe shape in which an internal flow path through which a liquid such as a chemical solution or a gas or other fluid flows is formed as shown in the figure. Member or elbow that is not shown, but the internal flow path bends in a substantially L shape, cheese that has a T-shape by branching the internal flow path, or the cross-sectional area of the internal flow path changes midway Or other resin pipe joints. In many cases, the resin tube member is formed by extrusion molding, and the resin pipe joint is formed by injection molding. The resin piping member 61 may be made of a resin material such as perfluoroalkoxyalkane (PFA), perfluoroethylene propene copolymer (FEP), or polyetheretherketone (PEEK), for example.

Such a resin-made piping member 61 may cause a serious problem when a fluid or gas such as a chemical solution flowing inside the resin-made piping member 61 leaks. It may be subjected to a test to confirm the above. The holding structure 1 of the embodiment shown in FIGS. 1 to 3 forms a part of an end seal 11 that can be used for such a test or the like.

More specifically, the illustrated end seal 11 has the holding structure 1 as described above, and the deep portion of the inner space 2a of the housing 2 at the bottom of the bottom surface 2b is closed. In addition, a stopper wall portion 2 c is formed in which the end portion of the resin piping member 61 abuts and prevents further progress of the resin piping member 61.

In this end seal 11, when the resin piping member 61 is inserted and passed through the inside, the resin piping member 61 sequentially passes through the through hole 3 a of the insertion member 3 and the inside of the cylindrical elastic member 4. After the passage, the end portion of the resin piping member 61 comes into contact with the deep stopper wall 2c of the internal space 2a, and the resin piping member 61 cannot be further advanced.
When the insertion member 3 is screwed into the housing 2 in this state, the resin-made piping member 61 is pressed by the elastic deformation inward of the cylindrical elastic member 4 pressurized by the insertion member 3. Retained. At the same time, the cylindrical elastic member 4 that is elastically deformed around the end of the resin piping member 61 is filled in the internal space 2 a whose volume is reduced by the insertion of the insertion member 3. The flow of the fluid flowing to the part is obstructed around the end part. Thereby, the edge part of the resin-made piping members 61 can be sealed.

In order to exhibit the holding function of the resin piping member 61 by the holding structure 1 as described above and the sealing function of the end portion of the resin piping member 61 by the end seal 11 more effectively, as in the illustrated embodiment. Furthermore, the inner surface 2d of the inner space 2a of the housing 2 is preferably parallel to the outer peripheral surface 4a of the cylindrical elastic member 4 and has a shape that follows the outer peripheral surface 4a. Here, the inner surface 2d of the internal space 2a is formed in a cylindrical shape that substantially matches the outer peripheral surface 4a of the cylindrical elastic member 4.

Further, the bottom surface 2b of the internal space 2a of the housing 2 is a surface parallel to the other end surface 4c of the cylindrical elastic member 4 that is located on the opposite side to the one end surface 4b pressed by the insertion member 3 in the axial direction. It is preferable to have a shape that follows the other end surface 4c. In the illustrated embodiment, the bottom surface 2b of the internal space 2a and the other end surface 4c of the cylindrical elastic member 4 are both parallel to a plane perpendicular to the central axis C.

In the holding state of the resin piping member 61, the other end surface 4 c of the cylindrical elastic member 4 is in contact with the bottom surface 2 b of the internal space 2 a of the housing 2, and the inner peripheral surface 4 d of the cylindrical elastic member 4. Are in contact with the outer peripheral surface of the resin piping member 61, and the cylindrical elastic member 4 is preferably filled in the internal space 2a of the housing 2.
Here, “filling” means that the cylindrical elastic member 4 has no gap in the area defined by the bottom surface 2b and the inner surface 2d of the internal space 2a and the pressurizing tip of the insertion member 3 in the internal space 2a. Means being stuffed.

In short, in the internal space 2a of the housing 2, the tubular elastic member 4 is disposed by the resin piping member 61 when the insertion member 3 is pressurized by substantially eliminating a space margin where the cylindrical elastic member 4 does not exist. As a result, the holding force of the resin piping member 61 is increased and the end portion of the resin piping member 61 is sufficiently sealed.

As shown in the figure, the cylindrical elastic member 4 has a cylindrical shape in which the one end surface 4b and the other end surface 4c are in an annular shape parallel to a plane perpendicular to the central axis C and have a constant thickness in the axial direction. It is preferable to do.
Further, the inner diameter of the cylindrical elastic member 4 is set to the same size as the inner diameter of the through hole 3 a of the insertion member 3 in a state where the inner diameter of the tubular member 61 is not pressurized by the insertion member 3. It is preferable from the viewpoint of passing smoothly.

The holding structure 1 does not have a portion that enters the cylindrical elastic member 4. Therefore, according to the holding structure 1, in the holding state of the resin piping member 61, there is an adverse effect that the internal flow path of the cylindrical elastic member 4 is greatly narrowed by the portion entering the resin piping member 61. Absent.

By the way, the holding structure 1 shown in FIGS. 1 to 3 will be described in more detail. The housing 2 includes an exterior portion 5 having an inner space 2a and having a substantially cylindrical shape. Has a receiving end portion 5a that opens to receive the insertion member 3, and a female screw portion 5b formed on at least a part of the inner surface of the exterior portion 5 from the receiving end portion 5a to the internal space 2a. .

The insertion member 3 inserted into the inside of the housing 2 is provided around the through hole 3a in correspondence with the female screw portion 5b of the exterior portion 5, and has a male screw portion 3b fitted to the female screw portion 5b. And a pressurizing tip portion 3 c that is formed on the tip end side in the axial direction from the male screw portion 3 b and abuts against the cylindrical elastic member 4.
The insertion member 3 further includes a diameter-enlarging flange portion 3d having an outer diameter larger than that of the male screw portion 3b at the end opposite to the pressing tip portion 3c in the axial direction. For example, the user can hold the outer peripheral surface of the exterior portion 5 and the diameter-enlarged flange portion 3 d of the insertion member 3 to attach / detach the insertion member 3 to / from the housing 2.

Here, the insertion member 3 shown in the figure has a tapered surface 3e that inclines in a direction in which the pressurizing tip 3c protrudes in the axial direction toward the outer peripheral side. In other words, the tapered surface 3e has a shape that is located inwardly in the axial direction toward the inner peripheral side.
According to this configuration, since the cylindrical elastic member 4 is pressurized toward the resin piping member 61 by the tapered surface 3e, the adhesion between the cylindrical elastic member 4 and the resin piping member 61 is improved, and the resin There is an advantage that the holding force of the piping member 61 is increased.

In addition to or in place of the tapered surface 3e of the insertion member 3, the tapered surface is inclined so that the bottom surface 2b of the internal space 2a of the housing 2 protrudes in the axial direction toward the outer peripheral side. It can also be. In this case, the direction of the reaction force that the cylindrical elastic member 4 pressed by the insertion member 3 receives from the bottom surface 2b of the internal space 2a is caused by the fact that the bottom surface 2b has a tapered surface. Since it becomes 61 side, the retention strength of the resin piping member 61 can be raised.
In addition, here, the surface portion where the end face of the end portion of the resin piping member 61 abuts out of the most deeply located surface of the internal space 2a is defined as the abutting surface 2e, and the outer surface portion is defined as the bottom surface 2b. To do. It is preferable that the contact surface 2e is not tapered and is parallel to a plane orthogonal to the central axis C.

The taper angle of the tapered surface 3e of the insertion member 3 and / or the bottom surface 2b, which is the tapered surface of the internal space 2a, should be in the range of 10 ° to 45 ° with respect to the plane perpendicular to the central axis C. preferable. If this taper angle is too large, there is a concern that the elastic member may be damaged or the pressure applied may be reduced.

In the illustrated example, an inner surface level difference 5 c is provided between the female screw portion 5 b and the internal space 2 a on the inner surface of the exterior portion 5 of the housing 2, and the male screw portion 3 b and the pressure tip portion 3 c are provided on the outer surface of the insertion member 3. The corresponding outer surface step 3f is provided between the surface shape and the surface shape of the inner surface step 5c, the outer surface step 3f, and the like can be determined as appropriate for reasons necessary for the design.

1 to 3, a female screw portion 5b is provided on the housing 2 side and a male screw portion 3b is provided on the insertion member 3 side. On the contrary, as shown in FIG. It is also possible to provide the male screw portion 25b and the female screw portion 23b on the insertion member 23 side.

In the end seal 11 of FIG. 4, the housing 22 of the holding structure 21 has a male screw portion 25b protruding toward the insertion member 23, and a passage leading to the internal space 22a is formed inside the male screw portion 25b. Yes. Further, the insertion member 23 of the holding structure 21 surrounds the periphery of the male screw portion 25b of the housing 22, and is fitted into the male screw portion 25b. The insertion member 23 extends inside the female screw portion 23b and is inserted into the passage of the housing 22. And a pressurizing tip 23c. Other configurations are substantially the same as those shown in FIGS.

5 to 7

show holding structures

31 and 41 of other embodiments. The holding

structures

31 and 41 constitute a part of the connecting member 51 of the piping member, and the first holding structure 31 and the second holding structure 41 as two holding structures are connected to each other. Eggplant.

More specifically, the first holding structure 31 and the second holding structure 41 included in the connection tool 51 have substantially the same configuration as that shown in FIGS. Are integrally connected to each other, for example, at the ends of the

respective housings

32 and 42 opposite to the side where the

insertion members

33 and 43 are inserted in the axial direction.

In addition, a communication passage 52 that connects the interiors of the

housings

32 and 42 is formed in a deep part deeper than the

internal spaces

32a and 42a of the

housings

32 and 42.
In the illustrated example, the communication passage 52 has a cross-sectional area similar to that of the inside of the cylindrical

elastic members

34 and 44 when not pressurized. That is, since the inner diameter does not change between the inside of the cylindrical

elastic members

34 and 44 and the communication passage 52, the end portions of the

resin piping members

61a and 61b passed through the inside of the cylindrical

elastic members

34 and 44 are It is possible to smoothly enter the communication passage 52.

In order to connect the two resin-made

piping members

61a, 61b using such a connecting tool 51, the two resin-made

piping members

61a, 61b are respectively connected to the

insertion members

33, 43 of the connecting tool 51. Insert into the through

holes

33a, 43a. Then, by causing the respective end portions of the

resin piping members

61a and 61b to advance further back, the respective end portions are communicated as shown in FIG. 5 after passing through the respective cylindrical

elastic members

34 and 44. They face each other in the passage 52.

In this state, the

insertion members

33 and 43 are screwed into the corresponding

housings

32 and 42, and the cylindrical

elastic members

34 and 44 are pressurized by the

insertion members

33 and 43. Then, as described above, the cylindrical

elastic members

34 and 44 are elastically deformed inward, and the resin-made

piping members

61a and 61b are pressed from the outer peripheral side to hold them.

At this time, since the cylindrical

elastic members

34 and 44 are filled in the

internal spaces

32a and 42a, they also function to seal the periphery of the ends of the

resin piping members

61a and 61b. Thereby, even if the end portions of the

resin piping members

61a and 61b are not abutted so as to ensure liquid-tightness or air-tightness, the cylindrical

elastic members

34 and 44 surround the end portions. Since it is sealed, outflow of liquid or gas to the outer side (

insertion member

33, 43 side) from the cylindrical

elastic members

34, 44 is prevented.
Therefore, the two

resin piping members

61a and 61b can be effectively connected.

In the holding

structures

1, 31, and 41 described above, the cylindrical

elastic members

4, 34, and 44 may be made of a rubber material or an elastomer material, specifically, a nitrile rubber, a fluoro rubber, or a polyolefin elastomer (POE). preferable. On the other hand, the

housings

2, 32, 42 and the

insertion members

3, 33, 43 are made of polytetrafluoroethylene (PTFE), perfluoroalkoxyalkane (PFA), perfluoroethylene propene copolymer (FEP), or other resin material. can do.

Next, a prototype of the piping member holding structure according to the present invention was made and its performance was confirmed. However, the description here is for illustrative purposes only and is not intended to be limiting.

As an example, an end seal having a holding structure as shown in FIGS. 1 to 3 was produced. Each of the end seal of this example and the one-touch joint (KQG2H07-00 manufactured by SMC) as a comparative example is attached to the end of a resin tube member as a resin piping member made of PFA. Whether the resin tube member is held and the sealing of the end is affected when the internal pressure of the resin tube member is increased by sending gas into the resin tube member while holding the tube member A test was conducted to confirm the above.

For both the end seal of the example and the one-touch joint of the comparative example, the resin tube member is securely held even when the internal pressure of the resin tube member is increased to 1.0 MPa, and the There was no effect on the sealing of the edges.

After the end of this test, each of the end portion of the resin tube member attached with the end seal of the example and the end portion of the resin tube member attached with the one-touch joint of the comparative example was confirmed. As shown in FIG. 9, the end portion attached with the one-touch joint of the comparative example was attached to the outer peripheral surface over the entire circumference, while the end seal of the example was attached to the outer peripheral surface. No such damage was found at the edges.

From the above, according to the present invention, it was found that the resin piping member can be effectively held while suppressing the occurrence of damage to the resin piping member.

1, 21, 31, 41 Piping

member holding structure

2, 22, 32, 42

Housing

2a, 22a, 32a, 42a Internal space 2b Bottom surface 2c Stopper wall 2d Inner surface 2e

Contact surface

3, 23, 33, 43

Insertion member

3a, 33a, 43a Through-

hole

3b,

25b Male thread

3c, 23c Pressure tip 3d Expanded flange 3e Tapered surface 3f Stepped

surface

4, 34, 44 Cylindrical elastic member 4a Outer peripheral surface 4b One end surface 4c Other end surface 4d Inner peripheral surface 5 Exterior portion 5a Receiving

end portion

5b, 23b Female thread portion 5c Inner surface step 11 Piping member end seal 51

Piping member connector

61, 61a, 61b Resin piping member C Center axis

Claims

A structure for holding a resin piping member,
A housing in which an internal space is formed, a through-hole through which a resin piping member passes, and an insertion member that is inserted into the housing while being fitted to the housing by a screw; and is disposed in the internal space of the housing; A cylindrical elastic member that receives the resin piping member that has passed through the through hole of the insertion member on the inside,
A pipe configured to press the resin-made piping member from the outer peripheral side by pressing the cylindrical elastic member in the axial direction in the internal space and elastically deforming inward by the insertion member inserted into the housing. Member holding structure.
2. The piping member holding structure according to claim 1, wherein an inner surface of the internal space of the housing has a shape that follows the outer peripheral surface of the cylindrical elastic member.
The holding of the piping member according to claim 1 or 2, wherein a bottom surface of the internal space of the housing has a shape following the other end surface of the cylindrical elastic member opposite to the one end surface pressed by the insertion member. Construction.
The bottom surface of the inner space of the housing is in contact with the entire other end surface of the cylindrical elastic member opposite to the one end surface pressed by the insertion member in a state where the resin piping member is held. The holding structure for a piping member according to any one of claims 3 to 4.
The holding of the piping member according to any one of claims 1 to 4, wherein the entire inner peripheral surface of the cylindrical elastic member is in contact with the outer peripheral surface of the resin piping member in a holding state of the resin piping member. Construction.
6. The piping member holding structure according to claim 1, wherein a cylindrical elastic member is filled in the internal space of the housing while the resin piping member is held.
The piping member holding structure according to any one of claims 1 to 6, wherein the cylindrical elastic member has a cylindrical shape.
The piping member holding structure according to any one of claims 1 to 7, wherein the cylindrical elastic member is made of a rubber material or an elastomer material.
The piping member holding structure according to any one of claims 1 to 8, wherein the housing and the insertion member are each made of a resin material.
The housing includes an exterior part in which the internal space is formed, and the exterior part has a receiving end that opens to receive the insertion member, and an inner surface of the exterior part between the receiving end and the internal space An internal thread portion formed on at least a part of
An insertion member is formed on the periphery of the through hole with a male screw portion fitted to the female screw portion of the exterior portion of the housing, and a pressure formed on the distal end side in the axial direction from the male screw portion and abutting against the cylindrical elastic member The piping member holding structure according to any one of claims 1 to 9, further comprising a tip portion.
The at least one of the said pressurization front-end | tip part of an insertion member and the bottom face of the said internal space of a housing has the taper-shaped surface which inclines in the direction which protrudes in an axial direction as it goes to an outer peripheral side. The holding structure of the piping member as described.
An end seal for a piping member having the piping member holding structure according to any one of claims 1 to 11, wherein a deeper portion than the internal space of the housing further advances the resin piping member. An end seal for a piping member that is blocked by a blocking stopper wall.
A piping member having a first holding structure and a second holding structure for a piping member, wherein each of the first holding structure and the second holding structure is a piping member holding structure according to any one of claims 1 to 11. A connection tool for members,
The first holding structure and the second holding structure are connected to each other at the ends of the respective housings on the side opposite to the side where the insertion member is inserted, and the first holding structure and the second holding structure, respectively. A connecting member for a piping member, wherein a communication passage for connecting the interiors of the housings is formed deeper than the internal space of the housing.