JP2012102871A - Pipe body integrated type joint, and connection structure of pipe body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe body integrated type joint and a connection structure of pipe bodies, capable of lessening the loss of fluid flow rate on a connection part as much as possible and reliably connecting pipe bodies to each other, in the pipe body integrated type joint and the connection structure of pipe bodies when connecting the pipe bodies to each other.SOLUTION: The pipe body integrated type joint 70 includes: the pipe body 10 in which one end part side is formed as a diameter expansion part 30 having a diameter larger than a body part 20; and a mold part 50 which is made by insertion molding of the diameter expansion part 30 of the pipe body 10, is formed into a flow path cross-section equal to the flow path cross-section in the body part 20, has a flow path communicating with the inside of the pipe body 10 and has a socket part 54, into which one end side 62 of another pipe body 60 to be connected is inserted, on the end part thereof. The connection structure 100 of pipe bodies is made by inserting one end side 62 of the another pipe body 60 into the socket part 54 of the pipe body integrated type joint 70.

Description

  The present invention relates to a coupling structure of a tubular body integrated joint and a tubular body.

  Various proposals have been made for connecting structures of pipes when connecting pipes. As such a connection structure between the tubular bodies, for example, there is a tubular body connection structure as disclosed in Patent Document 1 by the present applicant, and the present applicant has the patent right.

  The connection structure of the tubular body disclosed in Patent Document 1 is to insert an end portion of an insertion tube into a connection tube and connect the insertion tube to the connection tube while preventing the insertion tube from being removed. The connecting pipe is formed with a diameter smaller than that of the connecting pipe, and an enlarged diameter portion whose outer diameter matches the inner peripheral diameter of the connecting pipe is formed at the distal end inserted into the connecting pipe. A through hole is formed at a position overlapping the insertion portion into which the insertion pipe is inserted, and the connection pipe is inserted into the connection pipe with a diameter-enlarged portion of the insertion pipe beyond the position of the through hole. And a connecting portion formed by resin filling including the outer peripheral portion of the connecting tube and the inserting tube sandwiching the end face of the through hole, and the gap portion between the through hole and the inner peripheral surface of the connecting tube and the outer peripheral surface of the inserting tube. The connecting pipe and the insertion pipe are connected to each other while being prevented from coming off. A.

  By adopting such a configuration, it is possible to minimize the processing of the tip portion of the pipes (tube bodies) to be connected, and therefore, a pipe body that is used for connecting pipe bodies is manufactured at a very low cost. be able to. Moreover, although it is a connection part of a very simple shape, it is said that the effect that a very reliable connection structure can be provided at low cost can be acquired.

Japanese Patent No. 4464847

  In the connecting structure of tubular bodies as disclosed in Patent Document 1, when two pipe bodies are joined together, one is a connecting pipe and the other is an insertion pipe. The flow path size of the insertion tube is significantly smaller than the size, and the location of the problem that the loss of the fluid flow rate at the connecting portion cannot be avoided has been clarified.

  In view of this, the present invention relates to a connection structure between a tubular body-integrated joint and a tubular body when connecting the tubular bodies, and the loss of the fluid flow rate at the coupling portion is reduced as much as possible, and the tubular bodies are reliably coupled. The purpose is to propose a tube-integrated joint that makes this possible and a connection structure for the tube using this joint.

In order to achieve the above object, the present invention comprises the following arrangement.
That is, one end portion side of the tube body formed in the enlarged diameter portion larger in diameter than the main body portion, and the enlarged diameter portion of the tube body is insert-molded, and formed in a channel cross section equal to the channel cross section in the main body portion And a mold part having a socket part into which one end side of another pipe to be connected is inserted at the end part, and having a flow path leading to the pipe body. It is.

  Further, the socket portion is formed with an abutting wall that abuts on one end side of the other tubular body, and is formed at the inner end of the other tubular body at the inner end of the corresponding tubular wall. A sliding part that fits into the tapered part and slides the flow path in the mold part and the flow path of the other tubular body is formed. As a result, slight changes in the cross-section of the flow path at the connection boundary between the mold part and the other tubular body can be eliminated, and at any position of the tubular body and the mold part and the other tubular body connected thereto. In addition, it is possible to obtain a pipe-integrated joint having the same channel diameter (flow channel cross section) and a pipe connecting structure using the same.

  Further, on the inner side of the enlarged-diameter portion, an insertion body in which an outer peripheral surface abuts on an inner peripheral surface of the enlarged-diameter portion and an inner peripheral surface is formed to be equal to a flow path cross section in the main body portion is mounted. It is characterized by being. As a result, even when an external force is applied to the mold part or even under a high temperature condition, the flow path cross-sectional shape in the enlarged diameter part is always kept in agreement with the flow path cross-sectional shape in the main body part, thereby smoothing the fluid flow. Can be done.

  Also, a through hole is formed in the wall surface of the enlarged diameter portion, and the mold portion is molded so that the resin penetrates through the through hole, and the flow passage cross section in the main body portion is formed in the mold portion. The flow path formed in the flow-path cross section equal to is formed. Thereby, the integrity of a mold part and a tubular body can be improved.

  Moreover, the end edge of the said enlarged diameter part is further diameter-expanded in the trumpet shape. As a result, it is possible to provide a tube-integrated joint that further enhances the integrity of the mold part with respect to the tube, and a highly reliable connection structure of the tube can be realized.

  In addition, a fitting claw for fitting in a groove provided on the outer circumferential surface of the other tubular body is formed on the inner circumferential surface of the distal end portion of the socket portion. As a result, it is possible to prevent other pipes from falling off from the pipe-integrated joint, and it is possible to provide a more reliable pipe connection structure.

  In addition, a retaining member is disposed on the outer peripheral surface of the socket portion. As a result, it is possible to prevent other pipes from falling off the pipe-integrated joint, and to provide a more reliable pipe connection structure.

  There is also an invention as a tube connecting structure in which one end side of the other tube is connected to the tube-integrated joint according to any of the above.

  According to the coupling structure of the pipe-integrated joint and the pipe according to the present invention, it is possible to reduce the loss of the fluid flow rate at the coupling part of the pipes as much as possible and to securely connect the pipes. It is possible to provide a coupling structure of a tubular body integrated joint and a tubular body.

It is a pipe longitudinal direction sectional view of the 1st pipe body in a 1st embodiment. It is a pipe longitudinal direction sectional view showing a pipe integrated joint which formed a mold part in the 1st pipe shown in Drawing 1. It is a pipe longitudinal direction sectional view of the 2nd pipe. FIG. 4 is a cross-sectional view in the longitudinal direction of a pipe showing a connecting structure of pipes formed by inserting one end of a second pipe shown in FIG. 3 into a socket part of the pipe-integrated joint shown in FIG. 2. It is a pipe longitudinal direction sectional view showing the state where the exterior ring body was installed in the state shown in FIG. It is the top view (A) of an insertion body, and sectional drawing (B) in AA. It is a pipe longitudinal direction sectional view showing a pipe integrated joint in a 2nd embodiment. It is a pipe line longitudinal direction sectional view showing the connection structure of the pipe which inserts the end of the 2nd pipe in the socket part of the pipe integrated joint shown in FIG. It is a pipe longitudinal direction sectional view of the 1st pipe in a 3rd embodiment. FIG. 10 is a pipe longitudinal direction sectional view showing a pipe-integrated joint in which a mold part is formed on the first pipe shown in FIG. 9. It is a pipe line longitudinal direction sectional view showing the connection structure of the tubular body which inserts the end of the 2nd tubular body in the socket part of the joint integrated with a tubular body shown in FIG.

(First embodiment)
The first tubular body 10 in the present embodiment is manufactured into a tubular body having a circular channel cross section by so-called 12 nylon or polyurethane. As shown in FIG. 1, the first tubular body 10 includes a main body portion 20 and a diameter-expanded portion 30 formed so as to have a larger diameter than the diameter of the main body portion 20. The enlarged diameter portion 30 is formed over a required range in the flow channel extension direction (tube extension direction) of the first tube 10. An end edge of the enlarged diameter portion 30 is formed in a trumpet-like portion 32 that has a diameter larger than that of the enlarged diameter portion 30. The formation of the trumpet-shaped portion 32 can be omitted.

As shown in FIG. 2, the diameter-enlarged portion 30 of the first tubular body 10 is formed with a mold portion 50 by molding resin molding using a mold apparatus (not shown). The mold part 50 is made of mold resin (in this case, PP (polypropylene) is used as the mold resin over the required range from the inner peripheral surface side and the outer peripheral surface side of the tube wall surface of the enlarged diameter part 30 and the end face side of the enlarged diameter part 30. And the socket portion 54 into which the one end side 62 of the second tubular body 60 which is another tubular body is inserted are integrally formed.
When insert molding is performed using a mold apparatus, a core rod (not shown) having the same cross-sectional shape as the flow passage cross section of the first tubular body 10 is directed from the enlarged diameter portion 30 side toward the main body portion 20. The flow path diameter dimension (flow path cross section) in the first tubular body 10 is maintained by inserting the first pipe body 10 through the first pipe body 10.

  In the mold apparatus, for filling formed between the inner surface of the mold and the outer peripheral surface of the enlarged diameter portion 30, and between the inner peripheral surface of the enlarged diameter portion 30 and the outer peripheral surface of the core rod. The space is filled with mold resin. When the mold resin filled in the filling space is cured, the portion biting the trumpet-like portion 32 functions as a retaining portion for the mold portion 50 with respect to the first tubular body 10, and the expansion of the first tubular body 10 is performed. The mold part 50 can be integrally formed with the diameter part 30 in a state of being firmly fixed. In this way, the tubular body integrated joint 70 referred to in the claims is obtained by integrally forming the mold portion 50 at one end of the first tubular body 10.

  Further, as is clear from FIG. 2, the inner peripheral surface portion 52 of the insert portion 51 in the tube-integrated joint 70 is the same as the channel diameter dimension (channel cross section) in the main body portion 20 of the first tube body 10. It is formed in a channel diameter dimension (channel cross section). Further, a contact wall 53 is formed on the end surface of the inner peripheral surface portion 52 of the mold portion 50 on the socket portion 54 side at a portion where one end 62 of the second tubular body 60 to be connected contacts. At the inner end of the abutting wall 53, a sliding portion 53A that can be fitted into a tapered portion 62A formed at the inner end of the one end side 62 of the second tubular body 60 is formed. When one end side 62 of the second tubular body 60 is inserted into the socket portion 54, the end portion of the one end side 62 comes into contact with the contact wall 53, and the sliding portion 53 </ b> A is fitted into the tapered portion 62 </ b> A. And the flow channel on one end side 62 of the second tubular body 60 are slid. Here, although the form of the mold part 50 which has the contact wall 53 formed so that fitting to the taper part 62A of the one end side 62 of the 2nd pipe body 60 is shown, the one end side 62 of the 2nd pipe body 60 is shown. In the case where the tapered portion 62A is not formed, the contact wall 53 may be simply formed in a form for contacting the one end side 62 of the second tubular body 60.

  Also, the inner diameter dimension of the socket part 54 formed in the mold part 50 of the pipe-integrated joint 70 matches the outer dimension of the second pipe body 60, and the cross-section central axis CL1 in the flow path cross section of the insert part 51 The cross section central axis CL2 of the flow path cross section of the second tubular body 60 is formed so as to have the same axial arrangement (see FIG. 4 and the like). A fitting claw 56 that protrudes in the inner diameter direction and fits into a groove 66 formed in the outer circumferential surface of the second tubular body 60 is provided on the inner circumferential surface of the distal end portion of the socket portion 54.

As shown in FIG. 3, the one end side 62 of the second tube body 60 inserted into the socket portion 54 of the mold unit 50 has the same cross section as the cross section of the flow channel of the first tube body 10 as shown in FIG. Since the wall thickness of the tube wall is different, the outer diameter of the first tube body 10 is larger.
A tapered portion 62A is formed on one end side 62 of the second tubular body 60 from the outer peripheral surface side to the inner peripheral surface of the tubular body. The tapered portion 62A is formed in a shape that can be fitted to the sliding portion 53A formed on the abutting wall 53 of the insert portion 51. Further, an O-ring 64 formed of synthetic rubber or the like and having a sealing property is disposed on one end side 62 of the second tubular body 60 at a position overlapping with the socket portion 54. The O-ring 64 is mounted in a concave groove 65 formed on the one end side 62.

A fitting groove 66 into which the fitting claw 56 can be fitted is formed in a portion corresponding to the fitting claw 56 formed at the distal end portion of the socket portion 54 on the outer peripheral surface of the second tubular body 60. Yes. In the fitting groove 66, the side wall 66A on the main body side (the side opposite to the first pipe body 10 side) of the second pipe body 60 extends in the radially outward direction of the second pipe body 60, and is used for fitting. A protrusion 68 is formed at a position adjacent to the groove 66. The protruding portion 68 can be used as a stopper when the one end side 62 of the second tubular body 60 is inserted into the mold portion 50.
Since the outer peripheral surface of the second tubular body 60 is subjected to various features, irregularities are formed. However, the flow path diameter dimension (flow passage cross section) of the second tubular body 60 is in the pipe extension direction. It is always formed to have the same flow path diameter dimension (flow path cross section) in the main body portion 20 of the first tubular body 10.

  When the one end side 62 of the second pipe body 60 formed in this way is inserted into the socket part 54 in the mold part 50 of the pipe-integrated joint 70 as shown in FIG. 4, the socket part 54, the one end side 62, The O-ring 64 is crushed between. Thereby, the connection structure 100 of the tubular body connected in a state in which the second tubular body 60 is sealed to the socket portion 54 of the molded portion 50 of the tubular body-integrated joint 70 can be obtained.

  At this time, the sliding portion 53A formed on the abutting wall 53 of the insert portion 51 of the tube-integrated joint 70 is fitted into the tapered portion 62A on the one end side 62 of the second tube body 60, and the insert portion 51 The inner peripheral surface portion 52 can be connected to the inner peripheral surface of the flow channel in a state where the inner peripheral surface of the flow channel of the second tubular body 60 is substantially flush. In this state, the fitting claw 56 formed on the socket portion 54 is fitted into the fitting groove 66 formed on the outer peripheral surface of the second tube body 60, and the tube body-integrated joint 70 is fixed. The second tubular body 60 is connected in a state where it is prevented from coming off. At the same time, since the tip of the socket portion 54 is in contact with the side surface of the protruding portion 68 of the second tubular body 60, excessive insertion of the one end side 62 of the second tubular body 60 is prevented. The protrusion 68 can be regulated, and the fitting state between the sliding portion 53A and the tapered portion 62A of the contact wall 53 is preferably maintained.

Next, a method for connecting the tubular body integrated joint 70 (first tubular body 10) and the second tubular body 60 described in the present embodiment will be described. Since the details of each component have already been described, detailed description thereof will be omitted by using the same reference numerals.
Simultaneously with the formation of the enlarged diameter portion 30 at one end edge of the first tubular body 10 or after the formation of the enlarged diameter portion 30, the enlarged diameter portion 30 is provided at the free end of the enlarged diameter portion 30 as necessary. A trumpet-shaped portion 32 having a diameter larger than the inner diameter is formed.

  After the formation of the trumpet-shaped part 32, the enlarged diameter part 30 is set in a state where it is positioned in a mold apparatus (not shown). Thereafter, a core rod (not shown) is inserted into the main body portion 20 of the first tubular body 10 and is protruded from the free end portion side of the enlarged diameter portion 30, and the core rod and the inner peripheral surface of the trumpet-shaped portion 32 are connected. A core rod is set in a state where a gap portion serving as a mold resin filling space is formed therebetween, the mold of the mold apparatus is closed, and the mold resin is supplied into the mold. The core rod is used in which the cross-sectional shape in the direction orthogonal to the axial direction of the core rod is formed to be equal to the flow path cross-sectional shape in the main body portion 20 of the first tubular body 10.

  The filling space formed by the inner surface of the mold, the core rod, the enlarged diameter portion 30 and the trumpet-like portion 32 is filled with molten mold resin, and the insert portion 51 is formed by insert molding the enlarged diameter portion 30. The mold part 50 having the socket part 54 integrally formed with the insert part 51 is formed. The channel cross section in the inner peripheral surface portion 52 of the insert portion 51 is formed to be the same as the channel diameter dimension (channel cross section) in the main body portion 20 of the first tubular body 10 by the core rod. In this way, the tube-integrated joint 70 in which the first tube 10 and the mold part 50 are integrally formed can be obtained.

  Next, when the one end side 62 of the second tubular body 60 as shown in FIG. 3 is inserted into the socket portion 54 formed in the mold portion 50, as shown in FIG. The O-ring 64 disposed on the one end side 62 is elastically deformed so that the socket portion 54 and the one end side 62 are hermetically and liquid-tightly sealed, and the pipe-integrated joint 70 and the second pipe body 60 are connected. Can be linked. Further, the sliding portion 53A of the abutting wall 53 formed inside the insert portion 51 is fitted into the tapered portion 62A formed at the distal end portion of the one end side 62, and the flow path diameter dimension (flow) of the tube-integrated joint 70 is increased. The path cross section) and the flow path diameter dimension (flow path cross section) of the second tubular body 60 are continuously connected. Note that the amount of insertion of the one end side 62 into the socket portion 54 can be regulated by the fitting claw 56, the fitting groove 66 and the protruding portion 68.

  According to this embodiment, the pipes having the same flow path cross section and different external dimensions can be particularly suitably connected in this way. As long as the tube-integrated joint 70 is formed in accordance with the shape of the second tube 60, it is very easy to connect them to obtain the tube connection structure 100. Moreover, since the two pipe bodies 10 and 60 connected in this way have the same flow path diameter dimension (flow-path cross section), generation | occurrence | production of the turbulent flow of the fluid in a connection part can be suppressed. In addition, the fluid distribution efficiency can be greatly improved.

  Further, as shown in FIG. 5, the connection strength can be further improved by mounting an exterior ring body 80 as a retaining member formed so that the diameter of the inner peripheral surface is equal to the diameter of the outer peripheral surface of the socket portion 54. Can do. Such an exterior ring body 80 is preferably formed of a metal material.

(Second Embodiment)
The present embodiment is characterized in that the tube-integrated joint 70 is resin-molded in a state where an insertion body 90 as shown in FIG. 6 is mounted on the inner peripheral surface of the enlarged diameter portion 30 of the first tube body 10. Is. About the structure similar to 1st Embodiment, detailed description here is abbreviate | omitted by using the same code | symbol.
The insertion body 90 shown in FIG. 6 is formed in the taper part 92 in which the one end part of the cylindrical body 91 was thinned gradually over the required range. The outer peripheral surface of the insertion body 90 is dimensioned so as to abut on the inner peripheral surface of the enlarged diameter portion 30 of the first tubular body 10. The inner peripheral surface of the insertion body 90 is formed in the same cross-sectional shape as the flow path cross section in the main body portion 20 of the first tubular body 10. It is important that such an insert 90 is a material having a smaller amount of thermal expansion than the material of the mold resin or the first tube 10, and a specific material is preferably a metal material.

  The inserted body 90 is in a state in which the tapered portion 92 is inserted from the opening of the enlarged diameter portion 30 of the one tubular body 10 and fitted into the enlarged diameter portion 30. Thereby, the shape difference of the flow path cross section of the main-body part 20 and the enlarged diameter part 30 is complemented. The first tubular body 10 is inserted into the mold die on the side of the expanded diameter portion 30 with the insert 90 attached to the expanded diameter portion 30, and formed into a tubular integrated joint 70 as shown in FIG. It will be. The insertion body 90 is in a state of being prevented from coming off in the enlarged diameter portion 30 by the taper portion between the mold resin, the enlarged diameter portion 30 and the main body portion 20. In addition, since the strength of the insertion body 90 is higher than the strength of the first tubular body 10 and the mold part 50, the flow path cross section in the diameter expansion part 30 can be obtained by fitting the insertion body 90 into the diameter expansion part 30. It is also advantageous in that a constant cross-sectional shape can always be maintained.

By inserting the one end side 62 of the second tubular body 60 into the tubular body-integrated joint 70 formed as described above, a tubular body connection structure 100 as shown in FIG. 8 can be obtained. Although the outer ring body 80 as a retaining member can be mounted on the outer peripheral surface of the socket portion 54, it is of course possible to omit the mounting of the outer ring body 80.
In the tube connection structure 100 formed as described above, the strength at the connection portion is greatly improved by the insert 90 and the exterior ring body 80, and the tube connection structure 100 can be softened due to a change in temperature or the action of external force. Since the amount of deformation is extremely small, it is advantageous in that the occurrence of loosening of the connecting portion hardly occurs as compared with the tubular connecting structure 100 as shown in the first embodiment.

(Third embodiment)
FIG. 9 is a longitudinal sectional view of the first tubular body in the third embodiment. The present embodiment is characterized in that a through-hole 40 is formed in the tube wall surface of the enlarged diameter portion 30 so as to penetrate the tube wall surface inside and outside. The through-holes 40 are formed at two positions (positions on the diameter of the enlarged diameter portion 30) facing each other on the outer peripheral surface of the enlarged diameter portion 30. In the present embodiment, the through-holes 40 are arranged at two locations located on the diameter on the outer peripheral surface of the enlarged diameter portion 30, but at least three locations with a required interval on the outer peripheral surface of the enlarged diameter portion 30. It can also be arranged.

  If the molded part 50 is formed in the same manner as in the first embodiment using the first tube body 10 formed in this way, a tube-integrated joint 70 as shown in FIG. 10 can be obtained. Further, by inserting the one end side 62 of the second tubular body 60 into the mold part 50 of the tubular body-integrated joint 70 shown in FIG. 10, a tubular body connection structure 100 as shown in FIG. 11 can be obtained. Although not shown, the outer ring body 80 can be attached to the outer peripheral surface of the socket portion 54 of the tube connection structure 100 shown in FIG.

  In the present embodiment, since the mold resin filled in the inner peripheral surface portion 52 is also filled in the through hole 40 portion, the mold resin forms the tube wall of the first tubular body 10 on the outer peripheral surface side and the inner peripheral surface. Since a structure that bridges from the side is formed, it is advantageous in that the strength of the connecting portion can be increased as compared with the pipe-integrated joint 70 in the first embodiment.

  As described above, the pipe-integrated joint 70 and the pipe connecting structure 100 according to the present invention have been specifically described based on the embodiment. However, the present invention is not limited to the above-described embodiment, Various modifications can be made without departing from the scope. For example, in the tube-integrated joint 70 shown in each embodiment, in any case, the trumpet-shaped portion 32 that is further expanded in diameter than the expanded diameter portion 30 is formed on the edge of the expanded diameter portion 30. Although the tubular body 10 is used for insert molding in the mold part 50, the mold part 50 may be formed by omitting the structure of the trumpet-like part 32. In this case, the unity between the first tubular body 10 and the mold part 50 is slightly lower than the unity in the above embodiment, but there is no particular problem in practical use.

  In the case of using the first tubular body 10 in which the trumpet-like portion 32 is omitted, it is preferable that the number of through holes 40 formed in the enlarged diameter portion 30 is three or more. Thereby, the integrity of the first tube body 10 and the mold part 50 in the tube-integrated joint 70 is the same between the first tube body 10 and the mold part 50 in the tube-integrated joint 70 described in the above embodiment. It can be as much as unity.

  As a retaining member disposed on the outer peripheral surface of the socket portion 54 of the mold portion 50, in addition to the exterior ring body 80 described in each of the embodiments, an exterior ring body using PP (polypropylene) of the same material as the mold resin. 80 can also be formed. When forming an exterior ring body 80 that can withstand practical use using PP, the thickness of the exterior ring body 80 is larger than the thickness of the exterior ring body 80 shown in FIG. This is advantageous in that the cost can be greatly reduced. Further, as another form of the retaining member, it can be realized by a steel wire circulated around the outer peripheral surface of the socket portion 54, or other known retaining members can be adopted. is there.

  In addition, the shape of the contact wall 53 formed on the inner peripheral surface portion 52 of the insert portion 51 can be appropriately changed in accordance with the shape of the tapered portion 62 </ b> A on the one end side 62 of the second tubular body 60. In short, in the state where the flow path cross section of the inner peripheral surface portion 52 of the mold part 50 (insert part 51) and the flow path cross section of the second tubular body 60 are maintained in the same shape, the second integrated pipe joint 70 is attached to the tube integrated joint 70. As long as the pipe body 60 can be connected, the shape of the contact wall 53 may be any shape.

DESCRIPTION OF SYMBOLS 10 1st pipe body 20 Main-body part 30 Expanded-diameter part 32 Trumpet-like part 40 Through-hole 50 Mold part 51 Insert part 52 Inner peripheral surface part 53 Contact wall 53A Sliding part 54 Socket part 56 Fitting claw 60 Second pipe Body 62 One end side 62A Taper portion 64 O-ring 65 Concave groove 66 Fitting groove 66A Side wall 68 Projection portion 70 Tube-integrated joint 80 Exterior ring body 90 Insertion body 100 Tube connection structure

Claims (11)

A tubular body formed in an enlarged diameter portion whose one end side is larger in diameter than the main body portion;
Another pipe to be connected to the end portion is formed by insert-molding the diameter-expanded portion of the tubular body, having a flow passage cross section equal to the flow passage cross section of the main body portion, and having a flow passage communicating with the tubular body. And a molded part having a socket part into which one end side of the body is inserted. The socket portion is formed with an abutting wall that abuts on one end side of the other tubular body,
The inner end of the abutting wall is fitted into a tapered portion formed at the inner end on the one end side of the other tube body, and the flow path in the mold portion and the flow path of the other tube body are slid. The tube-integrated joint according to claim 1, wherein a sliding portion is formed.   On the inner side of the enlarged-diameter portion, an insertion body in which an outer peripheral surface abuts on an inner peripheral surface of the enlarged-diameter portion and an inner peripheral surface is formed to be equal to a flow path cross section in the main body portion is mounted. The tube-integrated joint according to claim 1 or 2. A through hole is formed in the wall surface of the enlarged diameter portion,
The mold part is molded so that the resin penetrates the through hole,
The tubular body-integrated joint according to claim 1 or 2, wherein a flow path formed in a flow path cross section equal to the flow path cross section in the main body portion is formed in the mold portion.   5. The tubular body-integrated joint according to claim 1, wherein an end edge of the diameter-expanded portion is further expanded in a trumpet shape.   The fitting peripheral claw for making it fit in the groove | channel provided in the outer peripheral surface of the said other pipe body is formed in the inner peripheral surface in the front-end | tip part of the said socket part. 5. The tube-integrated joint according to claim 5. A connecting structure for connecting two tubular bodies,
One tube is formed in the tube-integrated joint according to claim 1,
A connecting structure for tubular bodies, wherein one end side of the other tubular body is inserted into a socket portion of the tubular body-integrated joint. A connecting structure for connecting two tubular bodies,
One tube is formed in the tube-integrated joint according to any one of claims 2 to 5,
Inserted into the socket part of the tubular body-integrated joint so that one end side of the other tubular body having a tapered portion formed at the inner end is in contact with the abutting wall,
The tube connecting structure, wherein the sliding portion is fitted into the tapered portion. A connecting structure for connecting two tubular bodies,
One tube is formed in the tube-integrated joint according to claim 3,
One end side of the other tubular body is inserted into the socket part of the tubular body-integrated joint, and the flow path in the main body part of the one and the other tubular body is the same flow path through the inner peripheral surface of the insertion body. A connecting structure for tubular bodies, which is connected while maintaining a cross section. A connecting structure for connecting two tubular bodies,
One tube is formed in the tube-integrated joint according to claim 6,
One end side of the other tubular body in which a groove is formed along the outer peripheral surface is inserted into the socket part of the tubular body-integrated joint,
The tube connecting structure, wherein the fitting claw is fitted in the groove.   The connecting structure for tubular bodies according to any one of claims 7 to 10, wherein a retaining member is disposed on an outer peripheral surface of the socket portion.

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