JP2012221733A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a welding axis from being deflected and a resin connector from collapsing when a resin tube is frictionally welded to the resin connector.SOLUTION: A connector 1 held by a connector holding member 3 when it is spin-welded to a fuel tube 2 includes: a cylindrical tube insertion part 10 in which an annular tube inserting groove part 10c is formed; a cylindrical pipe mounting part 11 which perpendicularly extends from the end part opposite to the tube inserting groove part 10c in the tube insertion part 10 and to which a pipe is mounted; and a rib 13 which is formed on a spherical portion 12 existing between the tube insertion part 10 and the pipe mounting part 11 so as to be radially located on further outside than the tube inserting groove part 10c as viewed from the axial direction of the tube inserting groove part 10c, and which supports the spherical portion 12 with respect to the bottom face 3a of the connector holding member 3 as to the axial direction of the tube insertion part 10 when the fuel tube 2 is pressed against the tube inserting groove part 10c during spin-welding.

Description

  The present invention relates to a resin connector in which a resin tube is fitted and friction welded.

  A resin connector in which a resin tube is friction-welded (for example, spin welded) is known as a prior art (see, for example, Patent Document 1).

Japanese Patent No. 3547764

  For example, the connector shown in FIG. The resin connector 100 is held by the connector holding member 300 during friction welding with the resin tube 200. The connector 100 includes a tubular tube insertion portion 110 formed with an annular tube insertion groove 110c into which the tube 200 is inserted and friction welded, and a tube from the opposite side of the tube insertion groove 110c in the tube insertion portion 110. It has a cylindrical pipe attachment portion (attachment portion) 111 that extends at a right angle to the insertion portion 110 and to which a pipe is attached. Then, the contact surface between the tube 200 and the connector 100 is melted by frictional heat by inserting the tube 200 into the tube insertion groove 110c and pressing the tube 200 and rotating the connector holding member 300 around its rotation axis, and the molten resin is cooled. The tube 200 is solidified and welded to the connector 100.

  However, since the outer surface of the intermediate portion 112 between the tube insertion portion 110 and the pipe attachment portion 111 is spherical, there is a gap between the intermediate portion 112 and the bottom surface 300 a of the connector holding member 300. Then, the connector 100 is unstable because it does not include a member that supports the intermediate portion 112 with respect to a force (hereinafter referred to as a pressing force) for inserting and pressing the tube 200 into the tube insertion groove 110c. Therefore, there is a problem that the center axis (welding axis) C1 of the tube insertion groove 110c is shaken with respect to the rotation axis of the connector holding member 300 during friction welding. In particular, when the tube 200 whose insertion side end face is cut obliquely is pressed against the tube insertion groove 110c, the pressing force does not act uniformly over the entire circumference of the tube insertion groove 110c. With the contact portion as a fulcrum, the connector 100 tends to fall in the direction in which the pressing force acts, and the welding shaft is likely to shake.

  The present invention has been made in view of such a point, and the object thereof is to prevent welding shaft blurring and resin connector collapse during friction welding between the resin tube and the resin connector.

  A first invention is a resin connector that is held by a connector holding member during friction welding with a resin tube, and in which a tube having an annular tube insertion groove portion into which the tube is inserted and friction welded is formed Tube-shaped tube insertion portion, a tubular mounting portion that extends from a portion of the tube insertion portion opposite to the tube insertion groove portion, to which a member to be mounted is attached, and an intermediate portion between the tube insertion portion and the mounting portion At least a part of the tube insertion groove when viewed from the axial direction of the tube insertion groove and positioned radially outside of the tube insertion groove. When pressed against the insertion groove, the intermediate part is supported at least with respect to the connector holding member with respect to the axial direction of the tube insertion groove. It is characterized in further comprising a support portion.

  According to this, in the axial direction of the tube insertion groove portion, the support portion formed in the intermediate portion is positioned at the same position as the tube insertion groove portion or outside in the radial direction when viewed from the axial direction of the tube insertion groove portion. Since it supports with respect to a holding member, it can prevent that a connector falls down. When the tube insertion groove is pressed against the tube during friction welding, the support portion supports the intermediate portion with respect to the connector holding member in the axial direction of the tube insertion groove, so that the pressing force is transmitted via the support portion. It can be received by the connector holding member, and it is possible to prevent welding shaft blurring and connector collapse during friction welding.

  In a second aspect based on the first aspect, the support portion is a rib formed in the intermediate portion so as to extend in the axial direction of the tube insertion groove portion.

  According to this, the rib is formed in the intermediate portion so as to extend in the axial direction of the tube insertion groove portion at the same position or radially outside as the tube insertion groove portion when viewed from the axial direction of the tube insertion groove portion. Since the connector is supported with respect to the connector holding member in the axial direction of the tube insertion groove, it is possible to prevent the connector from falling in an orthogonal direction orthogonal to the axial direction of at least the tube insertion groove. When the tube insertion groove is pressed against the tube during friction welding, the rib linearly supports the intermediate portion with respect to the connector holding member with respect to the axial direction of the tube insertion groove. It can be received by the connector holding member, and at least the welding shaft blurring in the orthogonal direction and the collapse of the connector can be prevented.

  3rd invention is a plate-shaped member in which the said support part was formed in the edge part on the opposite side to the said tube insertion groove part in the said intermediate part so that the thickness direction might correspond to the axial direction of the said tube insertion groove part. It is characterized by this.

  According to this, the plate-like member is formed in the intermediate portion at the end portion on the opposite side of the tube insertion groove portion in the intermediate portion so that the thickness direction coincides with the axial direction of the tube insertion groove portion. Since the intermediate portion is supported in a planar shape with respect to the connector holding member in the axial direction of the tube insertion groove, it is possible to more reliably prevent the connector from falling down. When the tube insertion groove is pressed against the tube during friction welding, the pressing force can be received by the connector holding member via the plate-like member, thus reliably preventing welding shaft blurring and connector collapse. be able to.

  According to a fourth aspect of the present invention, the support portion is at least three rod-like members formed in the intermediate portion so as to extend in the axial direction of the tube insertion groove portion.

  According to this, at least three rod-shaped members are respectively formed in the intermediate portion so as to extend in the axial direction of the tube insertion groove portion, and these rod-shaped members are connected to the connector holding member with respect to the axial direction of the tube insertion groove portion. Therefore, the same effect as in the case of supporting the intermediate portion in a planar shape can be obtained.

  According to the present invention, the support portion supports the intermediate portion with respect to the connector holding member with respect to the axial direction of the tube insertion groove portion at the same position as the tube insertion groove portion as viewed from the axial direction of the insertion groove portion or radially outside of the tube insertion groove portion. Therefore, it is possible to prevent the connector from falling, and to prevent welding shaft blurring and connector falling during friction welding.

It is a perspective view of the connector concerning Embodiment 1 of the present invention. It is a figure which shows the state at the time of the friction welding of the connector which concerns on Embodiment 1, Comprising: (a) is IIa-IIa sectional view taken on the line of FIG. 1, (b) is seen from the IIb direction of FIG. FIG. FIG. 3 is a view corresponding to FIG. 2 illustrating a connector according to a second embodiment. It is a figure which shows the state at the time of the friction welding of the connector which concerns on Embodiment 3, Comprising: (a) is the figure seen from the lower side, (b) is a figure equivalent to FIG.2 (b). It is a figure which shows a connector.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a perspective view of a resin connector 1 according to an embodiment of the present invention. 2A and 2B are diagrams illustrating a state during friction welding of the connector 1 of the present embodiment, in which FIG. 2A is a cross-sectional view taken along the line IIa-IIa in FIG. 1, and FIG. It is the side view seen from the IIb direction. Here, the horizontal direction and the vertical direction in FIG. 2A are respectively referred to as “X direction” and “Z direction”, and the horizontal direction in FIG. 2B is referred to as “Y direction”. The Z direction coincides with a central axis (welding axis) C1 direction of a tube insertion portion 10 (tube insertion groove portion 10c) described later. The connector 1 is made of resin and is held by the connector holding member 3 during spin welding (friction welding) with the resin fuel tube 2. The connector 1 is used, for example, for piping for supplying fuel from a fuel tank of an automobile to an engine.

  The fuel tube 2 is a circular tube having an inner diameter and an outer diameter that are substantially constant from one end side to the other end side. For example, an inner layer made of a fluorine-based resin and a resin different from the inner layer are laminated on the outer side of the inner layer. Specifically, it consists of two layers with an outer layer made of nylon resin (for example, nylon 12).

-Configuration of connector 1-
The connector 1 is a so-called quick connector having a substantially L shape in which a fuel pipe (a member to be attached, not shown) is detachable. The connector 1 includes a hollow cylindrical tube insertion portion 10 formed with an annular tube insertion groove portion 10c into which the fuel tube 2 is inserted (fitted) and spin-welded, and a tube insertion groove portion 10c in the tube insertion portion 10. Is provided with a hollow cylindrical pipe attachment portion (attachment portion) 11 that extends at a right angle from the opposite end and to which the fuel pipe is attached. The tube insertion portion 10 and the pipe attachment portion 11 are made of resin and are integrally formed. As shown in FIG. 2B, the hollow portion 10a of the tube insertion portion 10 and the hollow portion 11a of the pipe attachment portion 11 are continuous. The hollow portion 10a has a smaller diameter than the hollow portion 11a.

  The tube insertion portion 10 is made of the same nylon resin (for example, nylon 12) as the outer layer of the fuel tube 2. As a result, the outer peripheral surface of the tube insertion groove 10c described later and the outer peripheral surface of the end portion 20 (hereinafter referred to as the insertion-side end portion) of the fuel tube 2 that is inserted into the tube insertion groove 10c are reliably welded. . The tube insertion portion 10 is shorter than the pipe attachment portion 11. The tube insertion portion 10 has an inner wall portion 10b having an annular shape when viewed from the Z direction, and an outer wall portion having an annular shape when viewed from the Z direction. The tube insertion groove portion 10c is formed between the inner wall portion 10b and the inner wall portion 10b. 10d. The inner wall portion 10b constitutes an outer wall of the hollow portion 10a of the tube insertion portion 10, and protrudes toward the fuel tube 2 from the outer wall portion 10d. The outer diameter of the projecting portion 10e gradually increases linearly from the distal end side toward the proximal end side. The inner wall portion 10b is thinner than the outer wall portion 10d. The reason why the thickness of the inner wall portion 10b is thin in this way is to secure the flow path diameter of the connector 1, that is, the inner diameter of the inner wall portion 10b. On the other hand, if the thickness of the inner wall portion 10b is reduced, the flow path diameter of the connector 1 can be ensured, so that the thickness of the outer wall portion 10d can be increased. The inner wall portion 10b also functions to support the fuel tube 2 softened by frictional heat when the fuel tube 2 is spin welded to the tube insertion groove portion 10c.

  The tube insertion groove portion 10c opens toward the fuel tube 2 side of the tube insertion portion 10 (upper side in FIGS. 2A and 2B) and has an annular shape when viewed from the Z direction. The outer diameter (outer diameter) of the tube insertion groove 10c is gradually linear as it goes from the opening side to the back side, that is, from the fuel tube 2 side in the Z direction to the opposite side before the fuel tube 2 is spin welded. Becomes smaller. That is, the outer peripheral surface of the tube insertion groove 10c, that is, the inner peripheral surface of the outer wall portion 10d has a tapered shape in which the diameter gradually decreases linearly from the opening side to the back side. As a result, when the fuel tube 2 is spin welded to the tube insertion groove 10c, the outer peripheral surface of the tube insertion groove 10c and the outer peripheral surface of the insertion side end 20 of the fuel tube 2 are surely in contact, and the pressing force is inserted into the tube. It certainly acts on the outer peripheral surface of the groove 10c.

  The pipe attachment portion 11 includes a cylindrical retainer 11b and a body 11c. The retainer 11b is a cylindrical member having an outer diameter larger than that of the tube insertion portion 10, and a pipe is fitted and joined thereto. The body 11c is a cylindrical member that connects the tube insertion portion 10 and the retainer 11b, and is made of the same nylon resin (for example, nylon 12) as the outer layer of the fuel tube 1. The tube insertion part 10 side end part of the body 11c has a smaller outer diameter than the tube insertion groove part 10.

  A spherical portion 12 having a spherical outer surface is provided at an intermediate portion (boundary portion) between the tube insertion portion 10 and the pipe attachment portion 11. The spherical surface portion 12 has the same outer diameter as the tube insertion groove 10 side end portion of the body 11c, is curved so as to protrude on both sides in the X direction, and protrudes on the opposite side to the body 11c in the Y direction. It is curved.

  Resin ribs 13 are integrally formed on the outer surface of the spherical surface portion 12. The rib 13 extends from the radially inner side to the outer side of the tube insertion groove 10c as viewed from the Z direction. Specifically, the rib 13 includes a vertical rib 131 extending in the Y direction and a horizontal rib 132 extending in the X direction so as to be orthogonal to the vertical rib 131. The vertical rib 131 has a Z-direction end surface 131a extending in the Y direction from the lowermost end portion of the spherical surface portion 12 to the same position as the Y-direction most protruding portion of the spherical surface portion 12, and the Y-direction end surface 131b is extended in the Z direction. Further, it is formed so as to extend from the Y direction outer side end portion of the Z direction end surface 131 a to the tube insertion portion 10 through the Y direction most protruding portion of the spherical surface portion 12. On the other hand, in the lateral rib 132, the Z-direction end surface 132a extends from the lowermost end of the spherical portion 12 to both sides in the X direction to the same position as the X-direction both ends of the spherical portion 12, and the X-direction both end surfaces 132b and 132b In the Z direction, the Z direction end surface 132a is formed so as to extend from the X direction both end portions to the tube insertion portion 10 through the X direction most protruding portion of the spherical surface portion 12.

−Configuration of connector holding member 3−
The connector 1 and the fuel tube 2 are spin welded by a spin welding apparatus. The spin welding apparatus includes a connector holding member 3 that holds the connector 1 during spin welding, a rotation mechanism (not shown) that automatically rotates the connector holding member 3, and a tube holding member (not shown) that holds the fuel tube 2. And have. The tube holding member is arranged on one side of the connector holding member 3 in the Z direction. Here, only the connector holding member 3 related to the present invention will be described.

  The connector holding member 3 has a block-shaped main body portion and an extension portion extending in the Z direction from the surface on the one side in the Z direction of the main body portion. The main body portion is formed with a recess that extends in the Y direction and receives and holds the pipe mounting portion 11 of the connector 1 from the rear thereof. The extension portion extends in the Z direction so as to be continuous with the recess. A recess for receiving and holding the tube insertion portion 10 from below is formed. The two recesses are substantially L-shaped as a whole, and a connector holding space S is formed by the internal space. The tube insertion portion 10 accommodated and held in the connector holding space S has a central axis C1 extending in the Z direction and protruding to the one side in the Z direction. In the connector holding member 3, the tube insertion portion 10 of the connector 1 faces the insertion side end 20 of the fuel tube 2 in the Z direction, and the central axis C 1 of the tube insertion portion 10 is the central axis C 2 of the fuel tube 2. The connector 1 is accommodated and held in the connector holding space S so as to match.

  On the bottom surface 3a of the connector holding space S, as shown in FIG. 2 (b), the body 11c of the pipe mounting portion 11 is placed on the portion facing the tube insertion portion 10, and the vertical and horizontal ribs 131, 132 are formed. The Z direction end surfaces 131a and 132a are in contact with the bottom surface 3a from the inner side to the outer side in the radial direction of the tube insertion groove 10c when viewed from the Z direction. Accordingly, since the rib 13 supports the spherical surface portion 12 in the Z direction with respect to the bottom surface 3a, the connector 1 can be prevented from falling down. In addition, the level | step difference is provided in the position corresponding to the connection part of the retainer 11b side part and the tube insertion part 10 side part of the body 11c of the bottom face 3a. Further, both side surfaces 3b, 3b in the X direction of the connector holding space S are opposed to the side surface of the tube insertion portion 10 and both end surfaces 132b, 132b in the X direction of the lateral rib 132. A step is provided at a position corresponding to the connecting portion. Further, the Y-direction side surface 3c of the connector holding space S faces the side surface of the tube insertion portion 10 and the Y-direction end surface 131b of the vertical rib 131, and corresponds to a connection portion between the tube insertion portion 10 and the spherical surface portion 12. There is a step on the surface.

-Spin welding procedure-
Next, the procedure of spin welding of the connector 1 and the fuel tube 2 by the spin welding apparatus will be described. First, the insertion side end portion 20 of the fuel tube 2 held by the tube holding member is connected to the tube insertion groove portion 10c of the connector 1 held by the connector holding member 3, and the central axis C1 of the tube insertion groove portion 10 and the fuel tube 2 are connected. Push in so that the center axis C2 coincides.

  When the connector 1 is rotated around the central axis C1 of the tube insertion portion 10 while the insertion side end portion 20 of the fuel tube 2 is pushed into the tube insertion groove portion 10c of the connector 1, the contact between the connector 1 and the fuel tube 2 occurs. The surface melts with frictional heat.

At this time, as described above, the outer diameter of the tube insertion groove 10c gradually decreases from the opening side toward the inner side, so that the outer peripheral surface of the tube insertion groove 10c and the outer peripheral surface of the insertion side end 20 of the fuel tube 2 are reduced. Will surely touch. On the other hand, the inner peripheral diameter of the tube insertion groove 10c is substantially constant as described above, and is smaller than the inner diameter of the fuel tube 2, so that the inner peripheral surface of the tube insertion groove 10c and the insertion-side end 20 of the fuel tube 2 are located. It can suppress that an internal peripheral surface contacts. From these things, the connector 1 and the fuel tube 2 mainly contact the outer peripheral surface of the tube insertion groove 10c and the outer peripheral surface of the insertion side end 20 of the fuel tube 2, and the contact surfaces are melted by frictional heat. .

  As described above, when the fuel tube 2 is inserted into the tube insertion groove 10c and pressed, the rib 13 supports the spherical surface portion 12 against the bottom surface 3a of the connector holding member 3 in the Z direction. That is, as shown in FIGS. 2 (a) and 2 (b), the vertical and horizontal ribs 131 and 132 are viewed from the Z direction in the Y and X directions, respectively, in the radial direction and outside of the tube insertion groove 10c. Is supported on the bottom surface 3 a of the connector holding member 3. As a result, even if the fuel tube 2 is pressed against the tube insertion groove 10c during spin welding, the pressing force can be received by the bottom surface 3a via the rib 3, thereby preventing the connector 1 from falling and the welding shaft from blurring. Can do.

  Next, when the pushing amount of the fuel tube 2 into the connector 1 reaches a preset pushing amount, the rotation of the connector 1 is stopped. Then, the connector 1 and the fuel tube 2 are held until the molten contact surface is cooled and solidified. At this time, as described above, the connector 1 and the fuel tube 2 are mainly in contact with the outer peripheral surface of the tube insertion groove 10c and the outer peripheral surface of the insertion side end 20 of the fuel tube 2, and the contact surface is caused by frictional heat. In order to melt, the outer peripheral surface of the tube insertion groove 10c and the outer peripheral surface of the insertion side end 20 of the fuel tube 2 are mainly welded. As described above, the spin welding between the connector 1 and the fuel tube 2 is completed. Thereafter, the fuel tube 2 welded to the connector 1 is removed from the tube holding member.

(effect)
As described above, according to the present embodiment, the rib 13 supports the spherical surface portion 12 with respect to the bottom surface 3a of the connector holding member 3 in the Z direction on the inside and outside in the radial direction of the tube insertion groove 10c as viewed from the Z direction. The connector 1 can be prevented from falling down. Furthermore, even if the fuel tube 2 is pressed against the tube insertion groove 10c during spin welding, the pressing force can be received by the bottom surface 3a via the ribs 13, so that the welding shaft is shaken and the connector 1 is tilted during spin welding. Can be prevented.

(Embodiment 2)
In the first embodiment, the support portion is a rib. However, in the present embodiment, as shown in FIG. 3, the support portion is configured by a support plate (plate-like member). FIGS. 3A and 3B are diagrams illustrating a state during friction welding of the connector 1 according to the present embodiment, in which FIG. 3A corresponds to FIG. 2A and FIG. FIG.

  The support plate 14 is a rectangular resin plate member, and is provided on the lower end surface of the body 11c of the pipe attachment portion 11 and the end portion of the spherical surface portion 12 opposite to the tube insertion groove portion 10c. Direction) is equal to the width of the bottom surface 3a of the connector holding member 3, and the length in the longitudinal direction (Y direction) is slightly longer than the length in the Y direction of the portion of the bottom surface 3a facing the tube insertion portion 10, and its thickness direction Coincides with the direction of the central axis C1 of the tube insertion portion 10. As shown in FIG. 3A, the X-direction side surfaces 14a and 14a of the support plate 14 are in contact with the X-direction side surfaces 3b and 3b of the connector holding space S, respectively. As shown in 3 (b), it is in contact with the Y-direction side surface 3c.

  Accordingly, the support plate 14 is formed on the spherical surface portion 12 at the end of the spherical surface portion 12 opposite to the tube insertion groove portion 10c so that the thickness direction coincides with the central axis C1 direction of the tube insertion groove portion 10c. Since the support plate 14 supports the spherical surface portion 12 with respect to the bottom surface 3a of the connector holding member 3 in the direction of the central axis C1, the connector 1 can be more reliably prevented from falling down. Further, when the tube insertion groove 10c is pressed against the fuel tube 2 during spin welding, the pressing force can be received by the bottom surface 3a via the support plate 14, so that the connector 1 falls and welds during spin welding. Shaking of the shaft can be prevented.

  Even if the connector 1 is held by the connector holding member 3 and a force is applied to the connector 1 so as to tilt it, the side surfaces 14a, 14a and 14b of the support plate 14 are respectively connected to the side surfaces 3a and 14a of the connector holding member 3, respectively. Since it is in contact with 3a and 3b, it can prevent still more reliably that the connector 1 falls down.

(Embodiment 3)
In the present embodiment, as shown in FIG. 4, the support portion is constituted by a support bar (bar-shaped member). 4A and 4B are diagrams illustrating a state of the connector 1 according to the present embodiment during friction welding, in which FIG. 4A is a diagram viewed from the bottom surface 3a of the connector holding member 3, and FIG. It is a figure equivalent to b).

  The support rods 15 are three rod-like members respectively formed on the spherical surface portion 12 so as to extend in the Z direction, and two of the support rods 15 and 15 are as shown in FIG. As viewed from the Z direction, the tube insertion groove 10c is arranged radially symmetrically in the X direction with the center axis C1 of the tube insertion part 10 as the center, and the other support bar 15 is centered on the center axis C1. The two support rods 15 and 15 are arranged concentrically on a Y-direction line passing through the central axis C1. As shown in FIG. 4B, the Z-direction end faces (lower end faces) 15 a, 15 a, 15 a of the support rods 15, 15, 15 are in contact with the bottom face 3 a of the connector holding member 3.

  Thereby, the support rods 15, 15, and 15 are formed on the spherical surface portion 12 so as to extend in the direction of the central axis C1 of the tube insertion portion 10 outside the tube insertion groove portion 10c when viewed from the Z direction. , 15 and 15 support the spherical surface portion 12 at three points with respect to the bottom surface 3a of the connector holding member 3 in the direction of the central axis C1, so that the connector 1 can be reliably prevented from falling down. Furthermore, when the fuel rod 2 is pressed against the tube insertion groove 10c when the support rods 15, 15, 15 are spin welded to the fuel tube 2, the spherical surface portion 12 is made to face the bottom surface 3a of the connector holding member 3 in the Z direction. Since it is supported at three points, it is possible to prevent the connector 1 from falling and the welding shaft from being shaken during spin welding.

  In the present embodiment, the support rods 15, 15, and 15 are provided on the radially outer side of the tube insertion groove 10c as viewed from the Z direction, but may be provided at the same position as the tube insertion groove 10c. Further, although the spherical portion 12 is supported at three points by the three support rods 15, 15, 15, four or more support rods may be provided and supported at four or more points.

(Other embodiments)
In each said embodiment, although the pipe attachment part 11 is extended from the tube insertion part 11 at right angle, it may extend to an acute angle or an obtuse angle without being restricted to this.

  Moreover, in the said embodiment, although the support part was comprised by the rib, the plate-shaped member, or the rod-shaped member, it is not limited to this, For example, seeing from the central-axis C1 direction of the tube insertion part 10, rather than a tube insertion groove part An annular member having a large diameter may be used.

  Moreover, in the said embodiment, although the outer surface of the intermediate part was spherical shape, it is not limited to this, For example, it has a larger bottom face than the tube insertion groove part 10 seeing from the central-axis C1 direction of the tube insertion part 10. It may be a block shape. Thereby, since an intermediate part supports itself in planar shape with respect to the bottom face 3a of the connector holding member 3, the fall of the connector 1 and the blurring of the welding axis | shaft can be prevented.

  Moreover, in the said embodiment, although spin welding is employ | adopted as friction welding, you may employ | adopt not only this but ultrasonic welding, vibration welding, etc., for example.

  Moreover, in the said embodiment, although the tube insertion part 10 consists of the same nylon-type resin as the outer layer of the fuel tube 2, as long as it is the same resin, you may consist of other resin.

  Furthermore, in the above embodiment, when the fuel tube 2 is spin welded to the tube insertion groove 10c, the connector 1 is rotated. However, the fuel tube 2 may be rotated.

  The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is defined by the claims, and is not limited by the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the connector according to the present invention can be applied to applications where it is necessary to prevent the resin connector from collapsing and the welding shaft from blurring during the friction welding between the resin tube and the resin connector. it can.

DESCRIPTION OF SYMBOLS 1 Connector 10 Tube insertion part 10c Tube insertion groove part 11 Pipe attachment part (attachment part)
12 Spherical surface (intermediate)
13 Rib (support)
14 Support plate (support part)
15 Support rod (support part)
2 Fuel tube 3 Connector holding member

Claims (4)

A resin connector that is held by a connector holding member during friction welding with a resin tube,
A tubular tube insertion portion formed with an annular tube insertion groove portion into which the tube is inserted and friction welded; and
A tubular mounting portion that extends from a portion of the tube insertion portion opposite to the tube insertion groove, and to which the member to be attached is attached,
The intermediate portion between the tube insertion portion and the attachment portion is formed so that at least a part thereof is located at the same position as the tube insertion groove portion or radially outside the tube insertion groove portion when viewed from the axial direction of the tube insertion groove portion, A support portion that supports at least the intermediate portion with respect to the connector holding member in the axial direction of the tube insertion groove when the tube is pressed against the tube insertion groove during friction welding with the tube. Characteristic connector. The connector according to claim 1, wherein
The connector is characterized in that the support portion is a rib formed in the intermediate portion so as to extend in the axial direction of the tube insertion groove portion. The connector according to claim 1, wherein
The support portion is a plate-like member formed at an end portion of the intermediate portion opposite to the tube insertion groove portion so that a thickness direction thereof coincides with an axial direction of the tube insertion groove portion. . The connector according to claim 1, wherein
The connector is characterized in that the support part is at least three rod-like members formed in the intermediate part so as to extend in the axial direction of the tube insertion groove part.

Images