JP2008304001A - Tubular member joint structure and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tubular member joint structure for standardizing the types of metal pipes to be a joint while avoiding the run-out of adhesive, without the need for polishing by machining on the outer peripheral face of a CFRP. <P>SOLUTION: The joint structure comprises a first tubular member 1, a second tubular member 2 having an outer periphery larger than the inner periphery of the first tubular member 1, the second tubular member 2 having a locking portion 2b formed by notching the outer peripheral face of the second tubular member 2 and provided on the insertion terminal end side of the second tubular member 2, and a recessed portion 2a formed by cutting off the outer peripheral face of the second tubular member 2 in a fitting region to partially form an adhesive filling space 5, an elastic porous member 3 somewhat larger than the inner periphery of the first tubular member 1 adhered to the end of the second tubular member 2 at its tube axis side, a through-hole 4 provided in the fitting region of the first tubular member 1 corresponding to the adhesive filling space 5, and the adhesive 7 filled in the adhesive filling space 5. The first tubular member 1 is fixed by the locking portion 2b, and the inner peripheral face of the first tubular member 1 is compression bonded to the outer peripheral face of the porous member 3 perpendicular to the tube axis. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a joining structure of tubular members used for a three-dimensional structure and a joining method thereof.

  In large structures applied to installation environments such as radio telescopes, resin materials such as CFRP (Carbon Fiber Reinforced) are lightweight, rigid, and have a low linear expansion coefficient in order to meet demands for high reliability, light weight, low thermal deformation, and the like. A three-dimensional truss or pole structure using a plastics tube or the like is used. These materials are assembled by bonding the pipe members or the pipe member and the joint by bonding.

  For example, in JP-A-2005-256349, FIG. 2 (see Patent Document 1), an adhesive filling space 8 is provided at the joint between the first tubular member 1 and the second tubular member 2, and the second tubular member is formed. A porous member 7 having elasticity is sandwiched between the insertion end of the member 2 and the engaging portion 4 provided on the inner diameter side of the first tubular member 1, and the end portion of the first tubular member 1 and the second portion A gap between the tubular member 2 and the outer peripheral surface of the tubular member 2 is sealed with a sealing material 9, and an adhesive is injected from an adhesive inlet 6 communicating with the adhesive filling space 8, and air in the adhesive filling space 8 is blown into the porous member 7. Are disclosed in which both tubular members are joined together and devised by the patent applicant.

Japanese Patent Laying-Open No. 2005-256349 (FIG. 2)

  However, as described in paragraph “0010” of Patent Document 1, when a metal such as Invar (iron nickel alloy) is used as a pipe joint, a resin pipe such as CFRP is inserted into the inner peripheral surface of the metal pipe. However, the outer peripheral surface of the CFRP has a corrugated surface (undulation) that occurs during molding, unlike the inner peripheral surface installed on the core metal (axial center). It was necessary to add a step of polishing by machining to make the outer peripheral surface uniform.

  Also, when using tubular pipes for large radio telescopes, etc., use pipes with different pipe shapes for the multiple pipe parts that support the parabolic antenna and the stays that support the secondary mirror installed above the parabolic antenna. When CFRP is used as the stay, it is preferable that the outer periphery and the thickness of the CFRP are large. In the structure in which the CFRP is inserted into the inner periphery of the invar joint, it is necessary to prepare a plurality of types of invar joints.

  This invention has been made to solve the above-mentioned problems, eliminates the need for polishing of the outer peripheral surface of the CFRP by machining, standardizes the type of metal pipe used as a joint, and processes the adhesive filling space. It aims at obtaining the joining structure of the tubular member which is provided in the metal pipe side which is easy, and does not protrude the adhesive agent, and its joining method.

  A joining structure of tubular members according to claim 1 is a joining structure of tubular members in which a first tubular member and a second tubular member are fitted and joined using an adhesive, and the first tubular member formed by resin molding A second tubular member made of metal having an outer periphery larger than the inner periphery of the first tubular member, and an outer peripheral surface cut out from the end of the second tubular member over a predetermined length along the tube axis. A locking portion for locking movement in the tube axis direction provided on the insertion terminal end side of the second tubular member, which is a fitting region between the one tubular member and the second tubular member, and the second tubular member in the fitting region The outer peripheral surface of the first tubular member is partially cut away to form an adhesive filling space in contact with the inner peripheral surface of the first tubular member, and the tube shaft side end of the second tubular member is adhered to the first tubular member. A porous member having resilience larger than the inner circumference of one tubular member and corresponding to the adhesive filling space A hole provided in the fitting region of the one tubular member, and an adhesive filled in the adhesive filling space, and the first tubular member is fixed by the locking portion, and the inside of the first tubular member The peripheral surface and the outer peripheral surface in the direction perpendicular to the tube axis of the porous member are pressure-bonded.

  The tubular member joining structure according to claim 2 is a resin-molded first tubular member in the tubular member joining structure in which a plurality of tubular members and a joint-like tubular member are fitted and joined using an adhesive. A second tubular member made of a metal whose outer periphery is larger than the inner periphery of the first tubular member and having both ends opened, and a predetermined length along the tube axis from the end on one end side of the second tubular member The first outer surface is cut out over the first fitting region of the first tubular member and the second tubular member, and the tube axial movement provided on the first insertion terminal side of the second tubular member is locked. A first adhesive filling space that is in contact with the inner peripheral surface of the first tubular member that is partially provided by notching the outer peripheral surface of the second tubular member in the first fitting region and notching the engaging portion. From the inner periphery of the first tubular member, the first hollow member is adhered to the end portion on the one end side on the tube axis side of the second tubular member. A first porous member having similar resilience, a first hole provided in the first fitting region of the first tubular member corresponding to the first adhesive filling space, and the first adhesive An adhesive filled in the agent filling space, a third tubular member formed by resin molding whose outer periphery is larger than that of the first tubular member and whose inner periphery is equal, and an end portion on the other end side of the second tubular member along the tube axis The outer peripheral surface is cut out over a predetermined length, and the tube axial movement provided in the second fitting region of the third tubular member and the second tubular member on the second insertion end side of the second tubular member is performed. A second locking portion to be locked, and a second adhesion contacting the inner peripheral surface of the third tubular member partially provided by cutting out the outer peripheral surface of the other end side of the second tubular member in the second fitting region. Adhered to the second recess forming the agent filling space and the end of the second tubular member on the tube axis side, and larger than the inner periphery of the third tubular member A second porous member having similar elasticity, a second hole provided in the second fitting region of the third tubular member corresponding to the second adhesive filling space, and the second adhesive An adhesive filled in the filling space, fixing the first tubular member at the first locking portion, and an outer periphery in a direction perpendicular to the inner peripheral surface of the first tubular member and the tube axis of the first porous member The third tubular member is fixed by the second locking portion, and the inner peripheral surface of the third tubular member and the outer peripheral surface in the direction perpendicular to the tube axis of the second porous member are pressure-bonded to each other. It is.

  According to a third aspect of the present invention, there is provided a tubular member joining method in which a first tubular member and a second tubular member are fitted together and joined using an adhesive. The outer peripheral surface to be inserted is cut out from the end of the second tubular member made of metal larger than the inner periphery of the first tubular member along the tube axis over a predetermined length, and the first tubular member and the second tubular member are cut out. A cutting step of providing a fitting region with the member and providing a locking portion for locking the movement in the tube axis direction on the insertion end side of the second tubular member, and cutting the outer peripheral surface of the second tubular member in the fitting region. A grinding step for providing a hollow portion that forms an adhesive filling space that is partially in contact with the inner peripheral surface of the first tubular member, and a porous member having resilience larger than the inner periphery of the first tubular member A bonding step of adhering to an end of the second tubular member on the tube axis side, and the adhesive A drilling step of providing a hole in the fitting region of the first tubular member corresponding to the filling space, fixing the first tubular member and the second tubular member at the engaging portion, and an inner periphery of the first tubular member The insertion step of crimping the surface and the outer peripheral surface in the direction perpendicular to the tube axis of the porous member and the gap between the end of the first tubular member and the engaging portion of the second tubular member are sealed with a sealing material A sealing step and filling the adhesive while injecting the adhesive into the adhesive filling space from the hole of the first tubular member and discharging the air in the adhesive filling space from the porous member; An adhesive injection step for joining the member and the second tubular member.

  The tubular member joining method according to claim 4 is a resin-molded first tubular member in the tubular member joining method in which a plurality of tubular members and a joint-like tubular member are fitted and joined using an adhesive. The outer peripheral surface is cut over a predetermined length along the tube axis from the end on the one end side of the second tubular member whose outer periphery is made of metal larger than the inner periphery of the first tubular member and is open at both ends. 1st cutting which provides the 1st latching | locking part which latches the movement of a pipe-axis direction at the 1st insertion terminal side of a 2nd tubular member while providing the 1st fitting area | region of a notch 1st tubular member and a 2nd tubular member Forming a first adhesive filling space in contact with the inner peripheral surface of the first tubular member provided by partially cutting out the outer peripheral surface of one end side of the second tubular member in the first fitting region; The first grinding step for providing the depression and the resilience that is similar to the inner circumference of the first tubular member. An adhering step of adhering the first porous member to the end portion on the tube axis side of the second tubular member, and the first fitting region of the first tubular member corresponding to the first adhesive filling space A first drilling step in which a hole is formed in the first tubular member and a first tubular member and a second tubular member are fixed by the first locking portion, and an inner peripheral surface of the first tubular member and a tube of the first porous member A first insertion step of pressure-bonding the shaft and the outer peripheral surface in the vertical direction; and a first sealing step of sealing a gap between an end portion of the first tubular member and the first locking portion of the second tubular member with a sealing material And filling the adhesive while injecting the adhesive into the first adhesive filling space from the hole of the first tubular member and discharging the air in the first adhesive filling space from the first porous member. Then, the adhesive injection step for joining the first tubular member and one end of the second tubular member, and the outer periphery is the first tubular member. A third tubular member having a predetermined length along the tube axis from the end of the other end of the second tubular member to be inserted into a resin-molded third tubular member having a large inner circumference. A second cutting step of providing a second engagement region between the second tubular member and the second tubular member and providing a second locking portion for locking the movement in the tube axis direction on the second insertion end side of the second tubular member; 2nd hollow part which forms the 2nd adhesive agent filling space which contact | connects the internal peripheral surface of the 3rd tubular member partially provided by notching the other end side outer peripheral surface of the 2nd tubular member of 2 fitting area | regions is provided. A second grinding step for adhering a second porous member having elasticity similar to and larger than the inner circumference of the third tubular member to the end portion on the other end side on the tube axis side of the second tubular member; And a second drilling process for providing a hole in the second fitting region of the third tubular member corresponding to the second adhesive filling space Fixing the third tubular member and the second tubular member with the second locking portion, and an inner peripheral surface of the third tubular member and an outer peripheral surface in a direction perpendicular to the tube axis of the second porous member. A second insertion step for crimping, a second sealing step for sealing a gap between an end of the third tubular member and the second locking portion of the second tubular member with a sealing material, and a hole in the third tubular member The third tubular member and the second tubular member are filled by injecting the adhesive into the second adhesive filling space from the portion and filling the adhesive while discharging the air in the second adhesive filling space from the second porous member. A second adhesive injection step for joining the other end of the tubular member.

  According to the joining structure and joining method of the tubular member according to the present invention, the inner periphery of the first tubular member is formed on the outer peripheral surface of the second tubular member made of metal inserted into the inner peripheral surface of the resin-molded first tubular member. A locking portion that locks the larger axial movement is provided, and the second tubular member is inserted into the inner peripheral surface of the first tubular member. Therefore, even if there is a corrugated surface on the outer periphery of the first tubular member, the fitting is possible. Since it is accurately performed, polishing of the outer peripheral surface of the first tubular member is unnecessary, the reliability of the strength of the fitting portion is increased, and it is possible to join the tubular members with low manufacturing man-hours and manufacturing costs. Since a porous member having elasticity larger than the inner periphery of one tubular member is attached to the end of the second tubular member on the tube axis side, the direction is perpendicular to the inner peripheral surface of the first tubular member and the tube axis of the porous member The outer peripheral surface of the first tubular member is pressed and scattered from the inner peripheral wall surface of the first tubular member. Teeth can be prevented.

  Further, since the second tubular member can be shared even if the outer periphery of the first tubular member is enlarged, it becomes easy to increase the strength by increasing the outer periphery of the first tubular member for a structure that requires strength. It is possible to incorporate a tubular joining member that ensures appropriate strength and weight according to the type of structure.

Embodiment 1 FIG.
1 is a cross-sectional view showing a state before joining in a joining method of tubular members according to Embodiment 1 of the present invention. In FIG. 1, 1 is a circular or square pipe (first tubular member) having an inner circumference (A) of about 90 mm and an outer circumference (B) of about 100 mm formed by resin synthetic fibers such as CFRP, and 2 is an invar. (C) is a metal pipe (second tubular member) with an inner circumference (C) of about 70 mm, and both tubular members are fitted on the inner circumferential surface by inserting it into the end of the first tubular member. Is done. 2a is a recess having a notch for fitting the outer peripheral surface in the vicinity of the insertion end of the second tubular member 2 with the inner peripheral surface of the first tubular member, and further providing a shallow notch region on the central axis side. Is an engaging portion of the second tubular member that is engaged with the end portion of the first tubular member 1, and 3 is an end of the second tubular member having a similar bonding material having an outer periphery slightly larger than the inner periphery of the first tubular member 1. A sponge-like elastic porous member affixed to the part 4 is a through hole (hole) provided near the end of the first tubular member.

  FIG. 2 is a sectional view showing a joined state of the tubular member according to the first embodiment of the present invention. In FIG. 2, 5 is located between the end portions of the second tubular member 2 and the locking portion 2 b in which a sealed space is formed on the inner peripheral surface of the hollow portion 2 a of the second tubular member 2 and the inner peripheral surface of the first tubular member 1. It is an adhesive filling portion (adhesive filling space) having a depth of about 0.2 to 0.5 mm. The porous member 3 attached to the second tubular member 2 has a structure that is crushed by the inner peripheral surface of the first tubular member 1 and prevents bleeding or liquid leakage due to scattering or protrusion of the adhesive. 1 and 2, the same reference numerals indicate the same or corresponding parts.

  FIG. 3 is a cross-sectional view showing the final structure after joining the tubular members according to Embodiment 1 of the present invention. In FIG. 3, 6 is a seal made of an epoxy material or the like for bonding the end portion of the first tubular member and the locking portion 2 b, and 7 is filled in the adhesive filling portion 5 from the through hole (adhesive inlet) 4. It is an adhesive. 1 and 2 indicate the same or corresponding parts.

  Next, the joining method and joining order of the tubular members will be described with reference to FIGS. First, in the cutting step, as shown in FIG. 1, the outer circumference inserted into the first tubular member 1 is a predetermined length along the tube axis from the end of the second tubular member 2 that is larger than the inner circumference of the first tubular member 1. The outer peripheral surface is cut out to set a fitting region between the first tubular member 1 and the second tubular member 2, and the movement in the tube axis direction is locked to the insertion end side of the second tubular member 2. A stepped locking portion 2b is provided.

  Next, in the grinding process, the outer peripheral surface of the second tubular member 2 in the fitting region is cut out thinly by about 0.2 mm to 0.5 mm to form a partial recess, and the inner periphery of the first tubular member 1 is formed. A recess 2a that forms an adhesive filling space 5 by contacting the surface is provided.

  Next, in the attaching step, a sponge-like porous member 3 larger than the inner periphery of the first tubular member 1 is attached to the end of the second tubular member 2 on the tube axis side with an adhesive such as an adhesive or adhesive tape. wear.

  Next, a through hole 4 is provided in the fitting region of the first tubular member 1 corresponding to the adhesive filling space 5 in a drilling process.

  Next, in the insertion step, the first tubular member 1 and the second tubular member 2 are fixed by the engaging portion 2b, and the outer peripheral surface in the direction perpendicular to the inner peripheral surface of the first tubular member 1 and the tube axis of the porous member 3 is used. And crimp. That is, when the first tubular member 1 is relatively moved and pressed in the direction of the tube axis of the second tubular member 2, the outer peripheral tip of the porous member 3 becomes the first tubular member 1 as shown in FIG. The second tubular member 2 passes through the end of the second tubular member 2 while being crushed by the inner peripheral surface of the second tubular member 2 and is locked by the locking portion 2 b of the second tubular member 2. Along with being locked by the locking portion 2 b, the adhesive filling portion 5 is formed between the recessed portion 2 a provided in the second tubular member 2 and the inner peripheral surface of the first tubular member 1.

  Next, in the sealing step, a minute gap between the end portion of the first tubular member 1 and the engaging portion 2b of the second tubular member 2 is sealed with a sealing material 6 as shown in FIG.

  Next, in the adhesive injection step, the adhesive 7 is injected into the adhesive filling space communicating from the hole 4 of the first tubular member 1 serving as the adhesive injection port, and the air in the adhesive filling space is passed from the porous member 3. The first tubular member 1 and the second tubular member 2 are joined by filling the adhesive 7 while discharging.

  From the above, in the first embodiment, even if the CFRP pipe has an undulating surface such as a corrugated surface on the outer periphery, the fitting surface of the CFRP pipe is the inner peripheral surface. It can be easily inserted. That is, it is not necessary to polish the first outer peripheral surface, the reliability of the strength of the fitting portion is increased, and it is possible to join a high-quality tubular member with reduced manufacturing steps and low manufacturing costs.

  Further, by the adhesive injection operation, the air inside the adhesive filling portion 5 is pushed by the adhesive 7 and diffuses through the joined gap between the first tubular member 1 and the second tubular member 2, but the adhesive 7 is bonded. While the entire surface of the agent filling portion 5 is filled so as to be substantially uniform, the adhesive 7 reaching the porous member 3 is absorbed and held in relatively large bubbles of the continuous porous member 3 to form a tubular shape. Prevents drooping inside the member.

Embodiment 2. FIG.
FIG. 4 is an external view for explaining a joining structure when one of the tubular members according to Embodiment 2 of the present invention is a joint. In FIG. 4, 8 is a holder installed by being wound around a metal binder or the like, 8a is a hole for fixing the holder 8, 10 is a resin molded pipe such as CFRP, 20 is a metal joint composed of invar, The metal joint 20 is one in which at least both ends of the second tubular member 2 described with reference to FIGS. 3 denote the same or corresponding parts.

  Next, a method for joining the tubular member and the metal joint will be described. FIG. 5 is an external view of a radio telescope installed on a mountain top or the like. FIG. 5A is an external view of a radio telescope reflector that schematically represents the parabolic surface upper structure. From the parabolic surface of the parabolic antenna, the stay, the support structure, the submirror installed on the upper portion of the parabolic surface, and the like. Become. FIG. 5B is a schematic diagram of a tubular member and a metal joint connected to a stay on the parabola surface, and FIG. 5C is a schematic diagram of a tubular member and a metal joint used for a support structure that supports the parabola surface. The figure is shown. As shown in FIG. 5, the structure supporting the stay may increase the strength due to the influence of the secondary mirror and the weight of the stay, the earthquake, and the wind load with respect to the many support structures that support the parabolic surface. . On the other hand, as shown in FIG. 6, since the metal joint 20 is inserted into the inner peripheral surface of the CFRP pipe 10, the CFRP pipe 10 is thicker and has a larger outer periphery (D) than the outer periphery (B) shown in FIG. Even in the case of using the metal joint 20, the metal joint 20 used for the support structure can be used in common. In FIG. 6, the same reference numerals as those in FIG. 4 denote the same or corresponding parts.

  From the above, since the second tubular member such as a metal joint made of invar or the like can be shared even if the outer periphery of the first tubular member such as a CFRP pipe is enlarged, the first tubular member is used for a structure requiring strength. Increasing the strength of the member by increasing the outer circumference and thickness of the member enables incorporation into a structure in which tubular members having various strengths are joined.

It is sectional drawing which shows the state before joining of the joining structure of the tubular member by Embodiment 1 of this invention. It is sectional drawing which shows the joining state of the joining structure of the tubular member by Embodiment 1 of this invention. It is a final sectional view of the joining structure of the tubular member by Embodiment 1 of this invention. It is an external view of the tubular member containing the metal coupling by Embodiment 2 of this invention. It is a model external view of a radio telescope reflector part. It is sectional drawing which shows the joining state of the joining structure of the tubular member by Embodiment 2 of this invention.

Explanation of symbols

1. First tubular member (resin pipe) 2. Second tubular member (metal pipe)
2a ··· depression 2b · · locking portion 3 · · porous member (sponge) 4 · · hole (through hole)
5. ・ Adhesive filling part (adhesive filling space) 6. ・ Sealing material 7. ・ Adhesive 8 ・ ・ Holder 8a ・ ・ Hole of holder
10. ・ CFRP pipe (first tubular member)
20..Fitting (second tubular member)

Claims (4)

In the joining structure of the tubular member that fits the first tubular member and the second tubular member and joins them using an adhesive, the outer periphery of the resin-molded first tubular member and the inner periphery of the first tubular member A second tubular member made of a large metal, and a fitting between the first tubular member and the second tubular member by cutting out the outer peripheral surface over a predetermined length along the tube axis from the end of the second tubular member A locking portion for locking movement in the tube axis direction provided on the insertion end side of the second tubular member in the region, and a portion provided by cutting out the outer peripheral surface of the second tubular member in the fitting region. Elasticity which is adhered to the hollow portion forming the adhesive filling space in contact with the inner peripheral surface of the first tubular member and the tube shaft side end portion of the second tubular member and is larger than the inner periphery of the first tubular member Provided in the fitting region of the first tubular member corresponding to the adhesive filling space And an adhesive filled in the adhesive filling space, the first tubular member is fixed by the locking portion, and the inner peripheral surface of the first tubular member and the tube axis of the porous member are perpendicular to each other The joining structure of the tubular member which crimped | bonded the outer peripheral surface of this. In a joining structure of tubular members, in which a plurality of tubular members and a joint-like tubular member are fitted and joined using an adhesive, a resin-molded first tubular member and an outer periphery from the inner periphery of the first tubular member A second tubular member made of a large metal and having both ends opened, and a first tubular member having an outer peripheral surface cut out from the end on one end side of the second tubular member over a predetermined length along the tube axis A first engaging portion that is a first fitting region between the first tubular portion and the second tubular member, and is provided on the first insertion terminal side of the second tubular member to lock the movement in the tube axis direction; A first hollow portion forming a first adhesive filling space in contact with an inner peripheral surface of the first tubular member provided by cutting out an outer peripheral surface of one end side of the second tubular member, and a tube of the second tubular member A first porous material which is adhered to the end portion on the one end side on the shaft side and has resiliency larger than the inner periphery of the first tubular member. Material, a first hole provided in the first fitting region of the first tubular member corresponding to the first adhesive filling space, an adhesive filled in the first adhesive filling space, and an outer periphery A third tubular member made of resin that is larger than the first tubular member and has the same inner periphery, and the outer peripheral surface is cut from the end of the other end of the second tubular member over a predetermined length along the tube axis. A second locking portion that locks movement in the tube axis direction provided on the second insertion end side of the second tubular member in the second fitting region between the notched third tubular member and the second tubular member; A second recess portion that forms a second adhesive filling space that is in contact with the inner peripheral surface of the third tubular member that is partially provided by cutting out the outer peripheral surface of the second tubular member in the second fitting region; A second porous member that is adhered to the end of the second tubular member on the tube axis side and has resiliency that is larger than the inner periphery of the third tubular member A second hole provided in the second fitting region of the third tubular member corresponding to the second adhesive filling space, and an adhesive filled in the second adhesive filling space, The first tubular member is fixed by the first locking portion, and the inner peripheral surface of the first tubular member and the outer peripheral surface in the direction perpendicular to the tube axis of the first porous member are pressure-bonded, and the third tubular member is fixed to the first tubular member. The joining structure of the tubular member which fixed by the 2 latching | locking part and crimped | bonded the inner peripheral surface of the 3rd tubular member, and the outer peripheral surface of the said 2nd porous member to the pipe axis and the orthogonal | vertical direction. In the method for joining tubular members, in which the first tubular member and the second tubular member are fitted and joined using an adhesive, the outer periphery to be inserted into the resin-molded first tubular member is from the inner periphery of the first tubular member. The outer peripheral surface is cut out from the end of the second tubular member made of a large metal along the tube axis over a predetermined length to provide a fitting region between the first tubular member and the second tubular member, and the second tubular member. A cutting step of providing a locking portion for locking the movement in the tube axis direction on the insertion end side of the member, and an inner periphery of the first tubular member partially cut away from the outer peripheral surface of the second tubular member in the fitting region A grinding step for providing a recess for forming an adhesive filling space in contact with the surface, and a porous member having resemblance elasticity larger than the inner periphery of the first tubular member at the end of the second tubular member on the tube axis side Adhering step for adhering, and fitting of the first tubular member corresponding to the adhesive filling space A drilling step of providing a hole in the region, fixing the first tubular member and the second tubular member at the engaging portion, and in a direction perpendicular to the inner peripheral surface of the first tubular member and the tube axis of the porous member An insertion step of crimping the outer peripheral surface, a sealing step of sealing a gap between an end portion of the first tubular member and the engaging portion of the second tubular member with a sealing material, and a hole portion of the first tubular member Adhesive injection for injecting adhesive into the adhesive filling space and filling the adhesive while discharging air in the adhesive filling space from the porous member to join the first tubular member and the second tubular member A method for joining tubular members comprising a step. In the method for joining tubular members in which a plurality of tubular members and a joint-like tubular member are fitted and joined using an adhesive, the outer periphery inserted into the resin-molded first tubular member is the inner periphery of the first tubular member. A first tubular member and a second tubular member formed by cutting out the outer circumferential surface over a predetermined length from the end on one end side of the second tubular member made of a larger metal and having both ends opened. A first cutting step of providing a first engagement region and a first locking portion for locking movement in the tube axis direction on the first insertion end side of the second tubular member; and a second of the first fitting region A first grinding step of providing a first recess for forming a first adhesive filling space in contact with an inner peripheral surface of a first tubular member partially provided by cutting out an outer peripheral surface of one end side of the tubular member; The first porous member having resilience that is larger than the inner periphery of the tubular member and is similar to the first tubular member on the tube axis side of the second tubular member An attaching step for adhering to an end on the one end side, a first drilling step for providing a hole in the first fitting region of the first tubular member corresponding to the first adhesive filling space, and a first tubular A first insertion step of fixing the member and the second tubular member with the first locking portion and press-bonding the inner peripheral surface of the first tubular member and the outer peripheral surface in the direction perpendicular to the tube axis of the first porous member. A first sealing step of sealing a gap between an end portion of the first tubular member and the first locking portion of the second tubular member with a sealing material, and the first adhesion from the hole portion of the first tubular member An adhesive is injected into the agent filling space and the adhesive is filled while discharging the air in the first adhesive filling space from the first porous member, and the first tubular member and one end of the second tubular member are connected. Adhesive injection step to be joined, and resin molded first in which the outer periphery is larger than the first tubular member and the inner periphery is equal A second fitting region between the third tubular member and the second tubular member by cutting out the outer peripheral surface over a predetermined length from the end on the other end side of the second tubular member to be inserted into the tubular member along the tube axis. And a second cutting step of providing a second locking portion for locking movement in the tube axis direction on the second insertion end side of the second tubular member, and the other end of the second tubular member in the second fitting region A second grinding step of providing a second recess for forming a second adhesive filling space in contact with the inner peripheral surface of the third tubular member partially provided by cutting out the outer peripheral surface; A second affixing step of adhering a second porous member having elasticity similar to and larger than the circumference to the end of the second tubular member on the tube shaft side; and the second adhesive filling space A second drilling step of providing a hole in the second fitting region of the corresponding third tubular member, and a third tubular member and a second tubular member. A second insertion step of fixing the second locking portion and crimping the inner peripheral surface of the third tubular member and the outer peripheral surface of the second porous member in the direction perpendicular to the tube axis; and an end of the third tubular member A second sealing step of sealing a gap between the second tubular member and the second locking portion of the second tubular member with a sealing material, and an adhesive from the hole of the third tubular member into the second adhesive filling space Injecting and discharging the air in the second adhesive filling space from the second porous member, filling the adhesive and joining the third tubular member and the other end of the second tubular member to inject the second adhesive A method for joining tubular members comprising a step.

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