JP2009000855A - Joint part structure of resin product, and resin product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint part structure of a resin product improved to have a smallest possible size and to advantageously prevent burrs from projecting onto the outer surface side. <P>SOLUTION: A joint part 44 formed by oscillation-welding a first resin component 12 and a second resin component 14, and the first resin component 12 and a third resin component 16 respectively at the mutually facing parts is constituted by providing first burr stop ribs 52, 56 at either one of the mutual facing surfaces of the first resin component 12 and second resin component 14, and providing at least part of the second burr stop ribs 64, 66 at the second resin component 14. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a joint structure of resin products, a resin product, and a method for joining resin parts, and in particular, in resin parts formed by joining three or more resin parts to each other by vibration welding, the three or more resins. A novel structure of the joint formed by joining the first, second, and third resin parts of the parts together by vibration welding, a resin product having such a joint structure, and the first And a method of advantageously joining the second and third resin parts by vibration welding.

  Conventionally, resin products formed by integrally joining a plurality of parts made of a synthetic resin material, so-called resin parts, have been used in various fields. And as one kind of joining methods of such a plurality of resin parts, there is a vibration welding method (friction welding method). As is well known, this vibration welding method is a frictional heat generated on a superposed surface by vibrating a plurality of resin parts while pressing each other in a state where the surfaces to be welded overlap each other. Welding with.

  By the way, when two resin parts are joined to each other by using such a vibration welding method, generally, at least one of the opposing surfaces of the two resin parts positioned to face each other. In addition, a bonding rib-like protrusion is provided, and a tip end surface of the bonding protrusion is overlapped (abutted) on at least one of the opposing surfaces to be vibration welded. However, at this time, a burr is generated at the welded portion between the bonding projection and the facing surface so as to flow out or extend sideways from between the bonding projection and the facing surface. And if this burr | flash is exposed to the outer surface side of the resin product obtained by joining resin parts, the appearance of this resin product will be reduced remarkably and the commercial property will be lost greatly.

  For this reason, for example, in the following Patent Document 1 and the like, the two resin parts to be welded are lower than the bonding protrusions on both sides of either of the bonding protrusions of the opposing surfaces. A rib (barrier) having a height and projecting in the same direction is integrally formed, and it is necessary that a burr generated by welding of a joining projection protrudes between the opposing surfaces of the two resin parts. Techniques have been proposed that prevent ribs. According to such a technique, the problem of deterioration in merchantability due to exposure of burrs to the outer surface side of the resin product can be effectively solved.

  Such a deburring technique is employed, for example, in a joint part of an automobile air connector or the like which is a kind of resin product. FIG. 9 schematically shows a structure of a typical joint part of such an air connector. Is shown in In the joint portion of the air connector, the second resin component 102 and the third resin component 104 are superimposed on the first resin component 100 from different directions (directions perpendicular to each other), respectively. It is formed by vibration welding. That is, the first resin component 100 and the second resin component 102 have flat facing surfaces 106 and 108 that face each other in the left-right direction in FIG. A first bonding protrusion 110 is formed on the protrusion 106 in the left-right direction. Further, the first resin component 100 and the third resin component 104 also have flat opposing surfaces 112 and 114 that face each other in the vertical direction perpendicular to the horizontal direction in FIG. A second bonding protrusion 116 is formed on the facing surface 114 of the resin component 104 so as to protrude in the vertical direction. Then, the tip surface 118 of the first bonding projection 110 provided on the facing surface 106 of the first resin component 100 is superimposed on the facing surface 108 of the second resin component 102 and is vibration welded. The front end surface 120 of the second bonding projection 116 provided on the facing surface 114 of the third resin component 104 is superimposed on the facing surface 112 of the first resin component 100 and vibration welded.

  In addition, the opposing surface 106 of the first resin component 100 and the opposing surface 108 of the second resin component 102 have a lower height than the first bonding projection 110 and protrude in the same direction as the first burrs. The stop ribs 122 are integrally formed on both sides of the first bonding projection 110 so as to extend along the side surface with a predetermined gap from the side surface of the first bonding projection 110. Has been. Further, each of the facing surface 112 of the first resin component 100 and the facing surface 114 of the third resin component 104 has a height lower than that of the second bonding projection 116 and is in the same direction as that. The second deburring ribs 124 projecting to the side of the second bonding projections 116 are sandwiched between the side surfaces of the second bonding projections 116 with a predetermined gap therebetween and along the side surfaces. It is integrally formed to extend. Thus, burrs 126 generated at the welded portion between the first bonding projection 110 and the facing surface 108 and the welded portion between the second bonding projection 116 and the facing surface 112 are formed on the resin parts 100, 102, The first deburring rib 122 and the second deburring rib 124 can be prevented from protruding outward from between the opposing surfaces 106, 108, 112, 114 of the 104. It is.

  However, in such a joint portion of the air connector, the first deburring rib 122 and the second deburring rib 124 provided on the two opposing surfaces 106 and 112 of the first resin component 100, respectively. However, since the ribs protrude in different directions, the ribs 122 and 124 cannot be used as a single rib. Therefore, in the first resin component 100 in which both the first deburring rib 122 and the second deburring rib 124 are separately provided, the first and second deburring ribs 122 are provided. , 124 is positioned in the vicinity, a predetermined gap 128 is inevitably formed between the ribs 122, 124 due to molding restrictions. Therefore, in the joint portion of the conventional air connector formed by joining the second resin component 102 and the third resin component 104 to be bonded to the first resin component 100 by vibration welding. In this case, it is inevitable that the size of the gap increases according to the size of the gap 128 provided between the first deburring rib 122 and the second deburring rib 124.

  For example, in order to eliminate the gap 128 that causes an increase in the size of the joint portion, the first burr stopper provided on the surface 106 of the first resin component 100 facing the second resin component 102 is used. The rib 122 is omitted, and the first burrs are formed only on both side edges of the second resin component 102 facing the first resin component 100 with the first bonding projections 110 interposed therebetween. When the first resin component 100 is provided with the stopper rib 122 and the first resin component 100 is provided with the first burr stopper rib 122, the first resin component 100 forms an inner peripheral surface of the gap 128 together with the rib 122. It is conceivable that the side surfaces of the first deburring ribs 122 provided at both side edges of the facing surface 108 of the second resin component 102 are brought into contact with the side surface portion 130 of the second resin component 102. However, in this case, for example, when the first bonding protrusion 110 is vibration welded to the facing surface 108 of the second resin component 102, the first burr stopper ribs provided on both side edges of the facing surface 108. The side surface 122 is also vibration welded to the side surface portion 130 of the first resin component 100 with which the side surface 122 comes into contact, and there is a possibility that a burr exposed on the outer surface side may be generated there.

JP-A-6-285994

  Here, the present invention has been made in the background of the circumstances as described above, and the problem to be solved is that the second resin component and the third resin are compared with the first resin component. In the joint part of the resin product formed by overlapping the parts from different directions and being welded by vibration, the entire size of the joint is made as small as possible while protruding from the outer surface of the burr. An object of the present invention is to provide a resin product joint structure improved so as to effectively prevent the resin product and a resin product having such a joint structure. In addition, the present invention provides a first resin component, a second resin component and a third resin component that are superposed from different directions and welded to each other by virtue of vibration welding. It is another object of the present invention to provide a method for advantageously joining the third and third resin parts.

  And, in the present invention, in order to solve the problems related to the joint structure of the resin product to be described above, the gist is that the first resin component and the second resin component respectively have At least one of the opposing surfaces facing each other in one direction protrudes in the first direction, and the tip surface of the integrally formed first bonding projection is connected to the opposing surfaces. The first direction of the first resin component and the third resin component, which are separate from the second resin component, are superposed on at least one of the other and vibration welded. The front end surfaces of the integrally formed second bonding projections projecting in the second direction on at least one of the opposing surfaces facing each other in different second directions are opposed to each other. On at least one of the faces The first resin component, the second resin component, and the third resin component are bonded to each other and bonded to each other by vibration welding. A first burr stopper rib for preventing burrs generated by vibration welding of the bonding protrusions from protruding between the opposing surfaces of the first resin component and the second resin component; There is provided a second burr stopper rib for preventing burrs generated by vibration welding of the bonding projections of the first resin component and the third resin component from protruding between the opposing surfaces of each other. A resin product joint structure, wherein the first burr-stopping rib is at least one of the opposing surfaces of the first resin component and the second resin component; The first direction in a state where a predetermined gap is separated from a side surface of the first joining protrusion. The first resin is integrally formed so as to protrude and extend along the side surface of the first joint protrusion, and at least a part of the second burr-stopping rib is formed with respect to the second resin component. Under vibration welding of the second joint protrusion to the part or the third resin part, the second joint protrusion protrudes in the second direction at a position spaced apart from the side face of the second joint protrusion and the second resin protrusion. The resin product joint structure is characterized in that it extends along the side surfaces of the two joint protrusions and is integrally formed so as to be arranged.

  In addition, according to one of desirable aspects of the joint structure of the resin product according to the present invention, the first burr stopper rib is opposed to the second resin component in the first resin component. The surface of the first resin component facing the third resin component is formed including the side surface of the first burr stopper rib.

  Further, when such a configuration is adopted, advantageously, the front end surface of the first burr stopper rib and the facing surface of the second resin component with respect to the first resin component Between the first engagement protrusion and the second burr stopper rib, while communicating with the gap between the first engagement protrusion and the second burr stopper rib. A recess that is not in communication with the gap positioned between the ribs is provided.

  In the present invention, the first resin component, the second resin component, and the third resin component, which are independent members, are vibrated in order to solve the problem related to the resin product. The gist of the present invention is also a resin product having a joint part formed by welding to each other and having a joint part structure having the characteristics described above. .

  And in this invention, in order to solve the subject concerning the joining method of the above-mentioned resin parts, the 1st resin parts, the 2nd resin parts, and the 3rd resin which consist of a separate member mutually independent A method of joining parts to each other by vibration welding, wherein each of the first resin part and the second resin part has at least one of facing surfaces facing each other in a first direction. One end of the first bonding protrusion that protrudes in the first direction and overlaps at least one of the other opposing surfaces is projected on the opposite surface of the first joint, A first formed integrally with at least one of the opposing surfaces so as to protrude in the first direction with a predetermined gap from the side surface of the protrusion and to extend along the side surface of the first bonding protrusion; At least the deburring rib When the first bonding projection is vibration welded to the opposing surface on which the first joining protrusion is disposed opposite to the other opposing surface, the burrs generated by the vibration welding are The first resin component and the second resin component are joined to each other while preventing the resin component and the second resin component from protruding from the mutually facing surfaces, and the first resin After the second deburring rib formed integrally with at least the second resin component of the component and the second resin component is protruded in a second direction different from the first direction, The first resin component and the third resin component each have at least one of the opposing surfaces facing each other in the second direction and project in the second direction so as to be integrated. The tip end surface of the formed second bonding projection The second deburring rib, which is superimposed on at least one of the other opposing surfaces of the two, protrudes in the second direction, and is at least partially integrated with the second resin component. The second resin projection is positioned so as to extend along the side surface of the second bonding projection with a predetermined gap, and the third resin component is opposed to the first resin component. When the second bonding projection is vibration welded to the facing surface on which the second bonding protrusion is overlapped with the surface, the burrs generated by the vibration welding are caused to occur between the first resin component and the first resin component. There is also provided a joining method for resin parts, characterized in that the first resin part and the third resin part are joined to each other while preventing the resin parts from protruding from the surfaces facing each other. And the gist thereof.

  That is, in the joint structure of the resin product according to the present invention, the first deburring rib and the second deburring rib are provided to vibrate the first bonding protrusion and the second bonding protrusion. Due to the welding, burrs generated in those welded portions are caused between the opposing surfaces of the first resin component and the second resin component, or between the opposing surfaces of the first resin component and the third resin component. It is prevented from protruding from the gap. This advantageously prevents the exposure of burrs to the outer surface of the resin product in which the first, second, and third resin parts are joined together, and the merchantability due to the exposure of burrs in such resin products. Can be prevented in advance.

  In the joint structure for resin products according to the present invention, in particular, the first deburring rib is provided on at least one of the first resin part and the second resin part. The protrusions of the engagement protrusions protrude in the first direction, and at least a part of the second deburring rib is different from the first direction with respect to the second resin component. It is possible to provide only the first deburring rib and provide the second deburring rib to the second resin part from the two protruding in two directions. It becomes. Therefore, even when the first deburring rib and the second deburring rib are positioned in the vicinity, both the first and second deburring ribs are the first resin parts. Unlike the conventional structure provided in the above, it is effectively eliminated that a gap is formed due to molding restrictions between the first burr stopper rib and the second burr stopper rib. Thus, the size of the entire joint can be advantageously reduced by the amount that the gap is eliminated.

  Therefore, according to the resin product joint structure according to the present invention as described above, the second resin component and the third resin component are superposed on the first resin component from different directions, and vibration is caused. It is possible to effectively prevent the burr from protruding to the outer surface side while reducing the overall size of the joint portion of the resin product formed by welding as much as possible. As a result, there is no exposure of burrs to the outer surface side, and an excellent commercial property with good appearance can be effectively secured.

  Further, in such a joint structure for resin products according to the present invention, the first and second deburring ribs allow the first resin part and the second resin part to face each other or between the first and second resin parts. The burr produced at the welded portion of the first bonding protrusion is prevented from protruding from the burr of the resin part and the third resin part from the mutually facing surfaces. The burr that enters between the opposing surfaces of the component and the third resin component, inhibits vibration welding of the second bonding projection, or occurs at the welding portion of the second bonding projection, It can also be advantageously prevented that the resin part and the second resin part enter between the opposed surfaces of each other and inhibit the vibration welding of the first joining protrusion. As a result, it is possible to effectively prevent the occurrence of poor welding of the first and second bonding protrusions, and hence the occurrence of poor bonding of the first, second, and third resin parts.

  And since the resin product according to the present invention has a joint structure that exhibits the excellent characteristics as described above, it has substantially the same functions and effects as the joint structure of the resin product to be placed. It can be enjoyed extremely effectively.

  In the method for joining resin parts according to the present invention, first, the first resin part and the second resin part are joined by vibration welding of the first joining protrusion, and then the second resin part. The first resin component and the third resin component bonded together are bonded by vibration welding of the second bonding protrusion. When the first resin part and the second resin part are joined, a burr generated by vibration welding of the first joining protrusion protrudes from between the facing surfaces of the first resin part and the second resin part. This can be advantageously prevented by the first deburring rib. Further, when the first resin part and the third resin part are joined, burrs generated by vibration welding of the second joining protrusions protrude from between the facing surfaces of the first resin part and the third resin part. However, the second deburring rib can be advantageously prevented. This advantageously prevents burrs from being exposed to the outer surface at the joints of the first, second, and third resin parts, and is thus formed by joining the resin parts together. A reduction in merchantability due to the exposure of burrs in the resin product can be prevented in advance.

  Moreover, in the method of the present invention, at least a part of the second burr stopper rib is provided on the second resin component, and the first resin component is joined to the first resin component by joining the second resin component to the first resin component. The stopper rib is protruded in a second direction different from the protruding direction of the stopper rib.

  Therefore, according to the method of the present invention, even when the first burr stopper rib and the second burr stopper rib protruding in different directions are positioned in the vicinity, for example, Unlike the case where both of the second deburring ribs are provided on the first resin part, the first deburring rib and the second deburring stop are due to molding restrictions of the first resin part. There can be no need to form gaps between the ribs, so that the size of the entire joint can be advantageously reduced by the amount of such gaps eliminated.

  Therefore, even in the resin part joining method according to the present invention as described above, substantially the same operations and effects as those of the resin product joining portion structure can be enjoyed very effectively.

  Hereinafter, in order to clarify the present invention more specifically, an embodiment of the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 schematically shows an automotive air connector as an embodiment of a resin product in which a joint structure according to the present invention is adopted, in a vertical cross-sectional form thereof. As is clear from FIG. 1, the air connector 10 of the present embodiment is overlapped with the connector main body 12 as the first resin component and the connector main body 12 in the vertical direction of FIG. Further, the joint pipe 14 as the second resin component and the connector main body 12 are overlapped in the left-right direction perpendicular to the vertical direction in FIG. It is constituted by an integrally joined product having a cover plate 16. In the following, for convenience, the directions corresponding to the vertical direction and the horizontal direction in FIG. 1 will be referred to as the vertical direction and the horizontal direction, respectively.

  More specifically, the connector main body 12 has a generally rectangular housing shape as a whole, and is a thermoplastic resin material (for example, ABS resin) generally used as a material for forming resin parts for automobiles. It is formed using. Then, the pipe-like connecting portion 18 is integrally formed on one of the side wall portions so as to communicate the inside and the outside of the connector main body 12 and extend sideways (a direction perpendicular to the paper surface in FIG. 1). Has been. Further, the connector main body 12 has an upper opening 20 that opens upward, and a side opening 22 that opens toward a side perpendicular to the extending direction of the pipe-like connecting portion 18. . Although not explicitly shown in FIG. 1, two side openings 22 are provided in the connector main body 12 and are arranged side by side in the extending direction of the pipe-like connecting portion 18.

  Further, in the connector main body 12, on the outer surface of the upper end portion of the four side wall portions, a joining flange portion 24 that protrudes laterally and extends continuously in the circumferential direction surrounds the upper opening portion 20. It is integrally formed. The upper surface of the joining flange portion 24 is a flat joining surface 26 that spreads in a horizontal direction with a predetermined width.

  Further, in the connector main body 12, the first joining projection 28 surrounds the outer peripheral edge of the side opening 22 outward with respect to the outer surface of the side wall 23 provided with the side opening 22. Thus, it is provided integrally. The first bonding protrusion 28 is a protrusion having a rectangular cross section having a predetermined height and a relatively wide width, and is continuously extended in the circumferential direction of the side opening 22.

  On the other hand, the joint pipe 14 is also made of the same thermoplastic resin material as the connector body 12 and has two pipe portions 30 (only one is shown in FIG. 1) having substantially the same inner diameter as the side openings 22 of the connector body 12. And a flange portion 32 for joining that is integrally provided with respect to the outer peripheral surface of one end in the axial direction of each of the pipe portions 30. And this flange part 32 for joining presents the frame-like flat form corresponding to the frame-like part except the side opening part 22 among the side wall parts 23 in which side opening part 22 of connector body 12 is formed, The end surface on one side in the thickness direction is a flat joint surface 34 that is flush with the end surface on one side in the axial direction of the pipe portion 30.

  The cover plate 16 is also formed using the same thermoplastic resin material as the connector main body 12 and the joint pipe 14. Then, the rectangular flat plate top plate 36 having a size capable of covering the entire upper opening 20 of the connector main body 12 and the lower plate outer peripheral portion of the top plate portion 36 integrally project downward. The leg portion 38 has a substantially thick rectangular frame shape. Further, in this cover plate 16, the lower surface of the leg portion 38 is a flat facing surface 40, and the cover plate 16 is disposed so as to cover the upper opening 20 of the connector body 12 as will be described later. Sometimes, the facing surface 40 is opposed to the flat joint surface 26 of the joint flange portion 24 of the connector body 12 with the same width. And the 2nd protrusion 42 for joining is integrally formed in the center part of the width direction of the opposing surface 40 of such a leg part 38 so that it may extend continuously in the circumferential direction. The second bonding protrusion 42 is also constituted by a protrusion having a rectangular cross section having a predetermined height and a relatively wide width, like the first bonding protrusion 28.

  In this case, the facing surface 40 of the leg portion 38 of the cover plate 16 is opposed to the joining surface 26 of the joining flange portion 24 of the connector body 12 in the vertical direction, and is integrated with the facing surface 40. The formed second bonding projection 42 is overlapped on the tip end face and vibration welded. Further, the outer surface of the side wall portion 23 having the side opening 22 of the connector main body 12 is opposed to the joint surface 34 of the joint flange portion 32 of the joint pipe 14 in the left-right direction, and is integrated with the outer surface. The formed first bonding projections 28 are overlapped on the front end surface and vibration welded.

  As is apparent from these, in the present embodiment, the joint surface 26 of the joint flange portion 24 of the connector main body 12 that is the first resin component and the leg portion 38 of the cover plate 16 that is the third resin component are opposed to each other. With the surface 40, the opposing surface which mutually opposes in the 1st direction (here up-down direction) which those resin components each has is comprised. Further, at the outer surface of the side wall portion 23 having the side openings 22 of the connector main body 12 as the first resin component, and the bonding surface 34 of the flange portion 32 for bonding of the joint pipe 14 as the second resin component. In the second direction (here, the left-right direction) that each of the resin parts has, opposing surfaces that are opposed to each other are configured.

  Thus, the cover plate 16 is integrally joined to the connector body 12 with the top plate portion 36 covering the upper opening 20 of the connector body 12 in an airtight manner, and the joint pipe 14 is The inner holes of the pipe portions 30 are integrally joined to the connector main body 12 in a state where the inner holes communicate with the side openings 22 of the connector main body 12. 12, a cover plate 16, and a joint pipe 14. In such an air connector 10, an upstream side intake pipe (not shown) extending from the air cleaner of the automobile is connected to the pipe-shaped connecting portion 18 of the connector body 12, while facing the engine side. Two downstream intake pipes (not shown) extending to each other are connected to the two pipe portions 30 of the joint pipe 14, so that the air supplied from the air cleaner through the upstream intake pipe is transferred to the two downstream intake pipes. In addition, each can be divided and distributed.

  Thus, in the air connector 10 of this embodiment formed of such an integrally joined product, the cover plate 16 and the joint are particularly connected to the upper end portion of the side wall portion 23 having the side opening 22 of the connector body 12. The structure of the joint portion 44 formed by joining the pipe 14 to each other is a special structure that is not found in conventional products.

  That is, as shown in FIG. 2, here, the joining flange portion 24 provided at the upper end portion of the side wall portion 23 having the side opening 22 of the connector main body 12 extends outward from the upper end portion of the side wall portion 23. The outer flange portion 46 extends horizontally toward the inner side, and the inner flange portion 48 extends horizontally inward from the upper end portion of the side wall portion 23. The outer flange portion 46 and the inner flange portion 48 both have a relatively thin rectangular plate shape. As a result, the joining surface 26 of the joining flange portion 24 is configured as a horizontally extending flat surface including the upper surfaces of the outer and inner flange portions 46 and 48 and the upper end surface of the side wall portion 23.

  The outer flange portion 46 of the joining flange portion 24 has a lower surface projecting in the direction of the first joining projection 28 projecting laterally from the upper end side portion of the side wall portion 23 of the connector body 12. Is positioned so as to face the upper side surface 50 of the side surfaces with a predetermined distance. The outer flange portion 46 serves as a first burr stopper upper rib 52.

  In other words, here, the first burr stopper upper rib 52 is in a state in which a gap 54 is separated from the upper end of the side wall portion 23 of the connector main body 12 and the upper side surface 50 of the first bonding projection 28. The first joining protrusions 28 are integrally formed so as to project in the same direction (right direction) as the projecting direction of the first joining protrusions 28 and to extend in parallel along the upper side surface 50 of the first joining protrusions 28. The first burr stopper upper rib 52 has a height that is a predetermined dimension lower than the height of the first bonding projection 28 before the vibration welding operation as described later is performed. (See FIG. 3).

  Further, the side wall 23 of the connector main body 12 in which the first upper burr stopper rib 52 is integrally formed has a first burr stopper below the portion where the first joining projection 28 is formed. The lower rib 56 is opposed to the lower side surface 58 of the first bonding projection 28 with a gap 60 therebetween, and is in the same direction as the protruding direction of the first bonding projection 28. It is integrally formed so as to protrude in the right direction and extend in parallel along the lower side surface 58 of the first bonding projection 28. The first deburring lower rib 56 has a slightly lower height than the first deburring upper rib 52 and a relatively thin rectangular plate shape similar to the height.

  Here, in the state where the first joining projection 28 is vibration welded to the joining surface 34 of the joining flange 32 of the joint pipe 14, the first deburring upper rib 52 and the first deburring stop are provided. The lower ribs 56 are in contact with the joint surfaces 34 of the joint flanges 32 of the joint pipe 14 at the respective front end surfaces. Further, the gap 54 formed between the upper side surface 50 of the first bonding projection 28 and the first burr stopper upper rib 52 and the lower side surface 58 of the first bonding projection 28 All gaps 60 formed between the first deburring lower ribs 56 are sealed spaces that are not in communication with the outside.

  Thus, in the joint portion 44 formed by joining the cover plate 16 and the joint pipe 14 to the upper end portion of the side wall portion 23 of the connector main body 12, the joint surface 14 is connected to the joint surface 34 of the joint flange 32. A burr 62 generated by vibration welding of the first bonding projection 28 is formed between the first deburring upper rib 52 or the first deburring lower rib 56 and the first bonding projection 28. Protruding outside the gaps 54 and 60, in other words, protruding from between the outer surface of the side wall 23 of the connector body 12 and the joint surface 34 of the joint flange 14 of the joint pipe 14 that are opposed to each other. And is hidden from the outer surface side.

  On the other hand, on the upper surface of the front end portion of the inner flange portion 48 of the joining flange portion 24 provided at the upper end portion of the side wall portion 23 of the connector body 12, that is, the inner end portion in the width direction of the joining surface 26 of the joining flange portion 24 The second deburring inner rib 64 is erected integrally. The second deburring inner rib 64 has a relatively thin wall thickness and a predetermined dimension lower than half of the protruding height of the second bonding protrusion 42 protruding from the leg portion 38 of the cover plate 16. It has a protrusion shape with a rectangular section that protrudes vertically upward with a height and extends continuously over the entire length of the joining surface 26 in the length direction (a direction perpendicular to the paper surface in FIG. 2).

  Here, in particular, a second deburring outer rib 66 is integrally projected on the upper end surface 65 of the joint flange 32 of the joint pipe 14. The second deburring outer rib 66 has substantially the same thickness as the second deburring inner rib 64 and a height that is a predetermined dimension lower than half the protruding height of the second bonding protrusion 42. A protrusion having a rectangular cross section that protrudes vertically upward from the upper end surface 65 of the joint flange 32 of the joint pipe 14 and continuously extends along the entire length of the upper end surface 65 in the length direction (direction perpendicular to the paper surface in FIG. 2). It has a strip form.

  In this second burr stopper outer rib 66, the first joining projection 28 provided on the side wall 23 of the connector body 12 vibrates on the joining surface 34 of the joining flange 32 of the joint pipe 14. Under the welded state, the second burr-stop inner rib 64 protrudes vertically upward to the side (right side) of the distal end portion of the outer flange portion 46 in the joining flange portion 24 of the connector body 12. It arrange | positions so that it may oppose.

  Thus, in the joint portion 44 formed by joining the connector body 12, the cover plate 16, and the joint pipe 14, the second deburring inner rib 64 and the second deburring outer rib 66. Projecting integrally at the inner and outer ends of the joint surface 26 of the joint flange portion 24 of the connector body 12 upward and facing each other over the entire length of the joint surface 26. It is fixed so as to extend in parallel.

  Further, here, a stepped surface 68 made of an inclined surface inclined upward is formed at the upper end portion of the joining flange 32 of the joint pipe 14, and the upper end portion of the joining flange 32 is thin. It has become. Under the vibration welding state of the first joining projection 28 of the connector body 12 to the joining surface 34 of the joining flange 32 of the joint pipe 14, below the tip of the first burr stopper upper rib 52 in the connector body 12. A side corner is abutted against the stepped surface 68. As a result, the first burr-stop upper rib 52 and the joint surface 34 at the upper end of the joint flange 32 of the joint pipe 14 thinned by the stepped surface 68 have a first A recess 70 is formed in the gap 54 between the one burr-stop upper rib 52 and the first bonding projection 28 so as not to communicate therewith and open upward.

  On the other hand, the second deburring inner rib 72 and the second deburring outer rib 74 are also provided on the facing surface 40 of the leg portion 38 of the cover plate 16 where the second bonding protrusion 42 is formed. Each of them is integrally projected. Each of the ribs 72 and 74 is provided on the second deburring inner rib 64 provided on the inner flange portion 48 of the joint flange portion 24 of the connector main body 12 and the upper end surface 65 of the joint flange 32 of the joint pipe 14. The second deburring outer rib 66 has a ridge shape having a rectangular section and substantially the same height and thickness.

  The second deburring inner rib 72 and the second deburring outer rib 74 sandwich the second bonding protrusion 42 on the opposing surface 40 of the leg portion 38 of the cover plate 16. On the inner side and the outer side, in a state of being opposed to the inner side surface 76 and the outer side surface 78 of the second bonding projection 42 with a predetermined distance from each other, so as to protrude downward, It is integrally formed.

  The second deburring inner rib 72 and the second deburring outer rib 74 provided on the facing surface 40 of the leg portion 38 of the cover plate 16 are connected via the second bonding protrusion 42. They are positioned so as to oppose each other, and are fixed so that the distances between the opposing surfaces thereof are located at both ends in the width direction on the joining surface 26 of the joining flange portion 24 of the connector main body 12. The distance between the opposing surfaces of the second deburring inner rib 64 and the second deburring outer rib 66 is the same.

  Here, the second joining protrusions 42 are provided on the connector body 12 and the joint pipe 14 in a state where the second joining protrusions 42 are vibration welded to the joining surface 26 of the joining flange 24 of the connector body 12. The deburring inner rib 64 and the second deburring outer rib 66 are respectively distal to the second deburring inner rib 72 and the second deburring outer rib 74 provided on the cover plate 16. They are faced to each other and positioned. In addition, the two second deburring inner ribs 64, 72 that are abutted with each other are positioned with a gap 80 between the inner side surfaces 76 of the second bonding protrusions 42, and such The gap 80 is formed as a sealed space that is not in communication with the outside. In addition, the two second deburring outer ribs 66 and 74 that are abutted against each other are also positioned with a gap 82 between them and the outer side surface 78 of the second bonding projection 42. It is formed as a sealed space that is not in communication with the outside.

  Thus, in the joint portion 44 formed by joining the cover plate 16 and the joint pipe 14 to the upper end portion of the side wall portion 23 of the connector main body 12, the joint surface 26 of the joint flange 24 of the connector main body 12 is connected. The burr 62 generated by vibration welding of the second bonding projection 42 is between the second deburring inner ribs 64 and 72 and the second deburring outer ribs 66 and 74 and the second bonding projection 42. Protrudes to the outside from the gaps 80 and 82, in other words, protrudes from between the joint surface 26 of the joint flange 24 of the connector main body 12 facing each other and the facing surface 40 of the leg portion 38 of the cover plate 16. This is blocked and hidden from the outer surface side.

  Further, in the joint portion 44, a recess 70 formed between the tip surface of the first burr stopper upper rib 52 and the joint surface 34 portion of the upper end portion of the joint flange 32 of the joint pipe 14 is formed. By opening upward, the gaps 82 formed between the two second deburring outer ribs 66 and 74 and the second bonding projection 42 are communicated. For this reason, the volume of the gap 82 is increased substantially by the volume of the recess 70, so that even if the second joining protrusion 42 is against the joining surface 26 of the joining flange 24 of the connector body 12. Even when a large amount of burr 62 is generated during vibration welding, it can be accommodated in the gap 82 and the recess 70. As a result, it is possible to advantageously prevent the burrs 62 from protruding between the two second deburring outer ribs 66 and 74 that form part of the outer surface of the air connector 10 on the outer side surface. It is like that.

  Further, since such a recess 70 is not in communication with the gap 54 formed between the first deburring upper rib 52 and the first bonding projection 28, the gap 54 is completely cut off from a gap 82 formed between the two second deburring outer ribs 66 and 74 and the second joining protrusion 42. As a result, the burr 62 generated during vibration welding of the first joining projection 28 to the joining surface 34 of the joining flange portion 32 of the joint pipe 14 becomes the two second deburring outer ribs 66 and 74 and the second. A burr 62 generated when entering the gap 82 formed between the bonding projection 42 or when the second bonding projection 42 is vibration welded to the bonding surface 26 of the bonding flange 24 of the connector main body 12 is provided. Intrusion into the gap 54 formed between the one burr stopper upper rib 52 and the first bonding projection 28 can be advantageously prevented.

  By the way, such a joining part 44 is formed by joining the connector main body 12, the joint pipe 14, and the cover plate 16 mutually as follows, for example.

  That is, first, as shown in FIG. 3, the joint pipe 14 is positioned so that the inner hole of each pipe part 30 communicates with each side opening 22 provided in the side wall part 23 of the connector body 12. In this state, the flat joint surface 34 of the joint flange portion 32 is overlaid (matched) with the flat front end surface of the first joint projection 28 of the connector main body 12. At this time, the connector main body 12 of each of the first deburring upper rib 52 and the first deburring lower rib 56 positioned above and below with the first bonding projection 28 interposed therebetween. Since the projecting height from the side wall portion 23 is smaller than the projecting height from the side wall portion 23 of the first bonding projection 28, the first burr stopper upper rib 52 and the first burr stopper. The respective front end surfaces of the lower ribs 56 are opposed to the joint surface 34 of the joint flange portion 32 of the joint pipe 14 with a predetermined distance therebetween.

  Next, according to a known method, the connector main body 12 is pressed against the joint surface 34 side of the joint flange portion 32 of the joint pipe 14 while the joint pipe 14 is held in a fixed position. It is vibrated in a direction perpendicular to the direction.

  Thus, as shown in FIG. 4, the frictional heat generated between the front end surface of the first joining protrusion 28 of the connector body 12 and the joining surface 34 of the joining flange portion 32 of the joint pipe 14 that are overlapped with each other. Thus, the tip end portion of the first joining projection 28 is melted, and thus the first joining projection 28 is vibration welded to the joining surface 34 of the joining flange portion 32. Further, the connector main body 12 and the joint pipe 14 are integrally joined by such vibration welding, so that the second burr stopper outer side integrally formed at the upper end portion of the joint flange portion 32 of the joint pipe 14. In a state where the rib 66 is located opposite to the second deburring inner rib 64 provided on the inner end in the width direction on the outer end side in the width direction of the joining flange portion 26 of the connector body 12, It is fixed.

  Further, this vibration welding operation is performed by the stepped surface 68 provided at the upper end portion of the joining surface 34 of the joining flange portion 32 of the joint pipe 14 at the tip lower corner portion of the first deburring upper rib 52. The front end surface of the first deburring lower rib 56 is brought into contact with the bonding surface 34 of the bonding flange portion 32 of the joint pipe 14, and the first deburring upper rib 52. And the gap 60 formed between the first bonding protrusion 28 and the first deburring lower rib 56 and the first bonding protrusion 28 are formed outside. Continue until disconnected and sealed. As a result, it is possible to prevent the burr 62 generated at the welded portion between the first bonding projection 28 and the bonding surface 34 of the bonding flange portion 32 from protruding from the gaps 54 and 60 to the outside.

  Thereafter, as shown in FIG. 5, the cover plate 16 covers the upper opening 20 of the connector main body 12 at the top plate portion 36, and the second burr provided on the facing surface 40 of the leg portion 38. A second inner rib 72 for fixing and a second outer rib 74 for burr fixing are fixedly provided so as to be positioned at both ends on both the inner side and the outer side in the width direction of the connecting flange portion 24 of the connector body 12. The connector main body in which the joint pipe 14 is integrally joined to the flat front end surface of the second joining protrusion 42 in a state where the inner face 64 for preventing burrs and the second outer rib 66 for preventing burrs are respectively positioned. 12 are overlapped (matched) with the flat joining surface 26 of the joining flange portion 24.

  At this time, the protruding height of each of the second deburring inner rib 72 and the second deburring outer rib 74 provided on the opposing surface 40 of the leg portion 38, and the joining flange portion 26 of the connector main body 12. The projecting heights of the second deburring inner rib 64 and the second deburring outer rib 66 fixed to both end portions on the inner and outer sides in the width direction are the same as the protrusion height of the second bonding protrusion 42. Since the height is smaller than half of the protruding height, the second deburring inner ribs 72 and 64 and the second deburring outer ribs 74 and 66 corresponding to each other have a predetermined distance from each other. They are positioned opposite each other.

  Next, according to a known method, with the connector main body 12 held in a fixed position, the cover plate 16 is pressed against the joint surface 26 side of the joint flange portion 24 of the connector main body 12, for example, on the paper surface of FIG. It can be vibrated in a perpendicular direction.

  Thus, as shown in FIG. 2, the frictional heat generated between the front end surface of the second joining protrusion 42 of the cover plate 16 and the joining surface 26 of the joining flange portion 24 of the connector body 12 overlapped with each other. Thus, the tip end portion of the second joining projection 42 is melted, and thus the second joining projection 42 is vibration welded to the joining surface 26 of the joining flange portion 24.

  In this vibration welding operation, the second deburring inner ribs 72 and 64 and the second deburring outer ribs 74 and 66 are brought into contact with each other at the front end surfaces, and the second deburring inner ribs 72 and 64 are brought into contact with each other. A gap 80 formed between the inner ribs 72 and 64 for fixing and the second bonding protrusion 42, or between the second outer ribs 74 and 66 for fixing burr and the second bonding protrusion 42. The gap 82 is continuously communicated to the outside in a closed state. This prevents the burr 62 generated at the welded portion between the second bonding projection 42 and the bonding surface 26 of the bonding flange portion 24 from protruding from the gaps 80 and 82 to the outside.

  Then, the joint pipe 14 and the cover plate 16 are overlapped with each other in the left-right direction and the up-down direction with respect to the connector main body 12, and are integrally joined to form a joint portion 44. Thus, the air connector 10 formed by integrally joining the connector main body 12, the joint pipe 14, and the cover plate 16 is formed. As shown in FIG. 1, in the air connector 10 thus formed, several joint portions except for the joint portion 44 are formed by vibration welding the connector body 12 and the cover plate 16. Alternatively, the connector main body 12 and the joint pipe 14 are formed by vibration welding, and the first deburring rib 84 and the second deburring rib 86 are also formed at their joints. The connector main body 12, the joint pipe 14, and the cover plate 16 are provided. As a result, the burr 62 generated by vibration welding does not protrude from the outer surface side of the air connector 10 at the first burr stopper rib 84 or the second burr stopper rib 86.

  Thus, in the air connector 10 of the present embodiment, the joint pipe 14 and the cover plate 16 are overlapped with each other in the left and right direction and the up and down direction with respect to the connector main body 12, and are formed by vibration welding. The joint 44 is provided with burr prevention ribs 52, 56, 64, 66, 72, and 74 so that the burr 62 protrudes to the outer surface side, and further, a welded portion between the connector body 12 and the joint pipe 14 Since the burr 62 is prevented from protruding to the welded portion between the connector main body 12 and the cover plate 16, it is possible to advantageously ensure excellent merchandise with good appearance and no joint failure. It is.

  In the present embodiment, the burr 62 is prevented from protruding to the outer surface side at the joining portion 44 at the time of vibration welding of the second joining projection 42 of the cover plate 16 to the joining flange portion 24 of the connector body 12. In addition, a second burr stopper outer rib 66 to be provided on the joining flange portion 24 of the connector body 12 is formed on the joint pipe 14 joined to the connector body 12. Therefore, unlike the case where the first deburring upper and lower ribs 52, 56 and the second deburring outer and inner ribs 66, 64 are provided in the connector body 12, In spite of the fact that the first deburring upper rib 52 and the second deburring outer rib 66 are disposed in the vicinity, both ribs 52 and 66 are formed due to molding restrictions of the connector body 12. It is possible to eliminate the need to form a gap between them, whereby the overall size of the joint 44 can be advantageously reduced by the amount of such gaps being eliminated. As a result, the space for installing such a joint portion 44 can be advantageously saved, and thus effective use of the space in which the air connector 10 should be installed can be effectively achieved. It is.

  Further, a first burr stopper upper rib 52 integrally formed on the outer surface of the side wall portion 23 of the connector main body 12 facing the joint pipe 14 is constituted by a part of the connecting flange portion 24 of the connector main body 12. The joining surface 26 of the joining flange portion 24 includes the upper side surface of the first deburring upper rib 52. Thereby, for example, compared to the case where the joint flange portion 24 and the first burr stopper upper rib 52 are provided separately and independently from each other with respect to the connector main body 12, the entire joint portion 44 is provided. The size can be advantageously reduced.

  The specific configuration of the present invention has been described in detail above. However, this is merely an example, and the present invention is not limited by the above description.

  For example, in the said embodiment, the side wall of the connector main body 12 which is the 1st resin component in which the 1st protrusion 28 for joining opposes the joining surface 34 of the flange part 32 for joining of the joint pipe 14 which is a 2nd resin component. The joint pipe 14 is joined to the outer surface of the side wall 23 of the connector main body 12 as shown in FIG. It can also be provided on the joint surface 34 of the flange portion 32 for use. Although not shown, the first joining protrusions 28 may be provided on both the outer surface of the side wall portion 23 of the connector main body 12 and the joining surface 34 of the joining flange portion 32 of the joint pipe 14. good. In FIG. 6 and FIGS. 7 and 8 to be described later, members and parts having the same structure as in the above embodiment are denoted by the same reference numerals as in FIGS. Omitted.

  Furthermore, in the said embodiment, the 2nd protrusion 42 for joining opposes the joint surface 26 of the flange part 24 for joining of the connector main body 12 which is 1st resin components, and opposes the cover plate 16 which is 3rd resin components. Instead of being provided on the surface 40, the second joining projection 42 is provided on the joining surface 26 of the joining flange portion 24 of the connector body 12, which faces the facing surface 40 of the cover plate 16. Also good. Further, the second joining protrusions 42 may be provided on both the joining surface 26 of the joining flange portion 24 of the connector main body 12 and the facing surface 40 of the cover plate 16 facing each other.

  Furthermore, the joint pipe 14 is joined to the outer surface of the side wall 23 of the connector main body 12 facing each other regardless of whether the first deburring upper rib 52 or the first deburring lower rib 56 is present. With respect to at least one of the joint surfaces 34 of the flange portion 32 for use, it protrudes in the left-right direction, for example, in a state where the upper side surface 50 and the lower side surface 58 of the first joint projection 28 are spaced from the gaps 54, 60. In addition, it may be integrally formed so as to extend along the upper and lower side surfaces 50 and 58 of the first bonding projection 28.

  Further, a second deburring inner rib 64 provided on the bonding surface 26 of the bonding flange portion 24 of the connector main body 12 and a second deburring inner rib 72 provided on the facing surface 40 of the cover plate 16. Either of them can be omitted.

  Furthermore, it is possible to omit the first deburring outer rib 74 provided on the facing surface 40 of the cover plate 16.

  Furthermore, the shape of the first bonding protrusion and the second bonding protrusion can be changed as appropriate according to the shape of the resin component or resin product.

  In addition, the first resin component, the second resin component, and the third resin component are mutually opposed in the joint formed by vibration welding of each other, and the first resin component and the second resin component face each other. The opposing directions of the one resin component and the third resin component are not particularly limited as long as the opposing directions are different from each other.

  Furthermore, the shape and arrangement of the first deburring rib and the second deburring rib are the same as the shape of the resin component or resin product, or the shape of the first bonding protrusion or the second bonding protrusion. It can be changed appropriately according to the above.

  Moreover, in the said embodiment, out of the joint part of the resin product (air connector 10) formed by integrally joining three resin parts (connector main body 12, joint pipe 14, cover plate 16), those three The present invention has been applied to the structure of the joint portion 44 formed by integrally joining resin parts by vibration welding. For example, as shown in FIGS. The present invention can be advantageously applied to a resin product obtained by integrally joining and a joint part of a resin product obtained by integrally joining five resin parts.

  That is, in the embodiment shown in FIG. 7, the central resin part 88 is a resin resin joint 88 formed by integrally joining the central resin part 88, the right resin part 89, the left resin part 90, and the upper resin part 91. The right-side resin part 89 and the upper-side resin part 91 are joined to each other by vibration welding, and a joining portion 92a is configured with the same structure as the joining portion 44 in the above-described embodiment. That is, here, the central resin component 88 is configured as the first resin component, the right resin component 89 is configured as the second resin component, and the upper resin component 91 is configured as the third resin component. Of the joint parts of the resin product, the joint part 92b formed by joining the central resin part 88, the left resin part 90, and the upper resin part 91 together by vibration welding is also the joint part 44 in the above embodiment. It is comprised with the same structure. That is, here, the central resin component 88 is configured as the first resin component, the left resin component 90 is configured as the second resin component, and the upper resin component 91 is configured as the third resin component.

  On the other hand, in the embodiment shown in FIG. 8, a resin product joined by integrally joining a central resin part 93, a right resin part 94, a left resin part 95, an upper right resin part 96, and a left upper resin part 97. Among the parts, the joint part 98a formed by joining the central resin part 93, the right resin part 94, and the upper right resin part 96 to each other by vibration welding has the same structure as the joint part 44 in the above embodiment. Has been. That is, here, the central resin component 93 is configured as a first resin component, the right resin component 94 is configured as a second resin component, and the upper right resin component 96 is configured as a third resin component. Of the joint parts of the resin product, the joint part 98b formed by joining the central resin part 93, the left resin part 95, and the left upper resin part 97 to each other by vibration welding is also the joint part in the above embodiment. 44 is configured with the same structure as 44. That is, here, the central resin component 93 is configured as the first resin component, the left resin component 95 is configured as the second resin component, and the upper left resin component 97 is configured as the third resin component.

  And similarly to them, the present invention is formed by joining three resin parts to each other by vibration welding among joint parts of resin products obtained by integrally joining six or more resin parts. The present invention can be advantageously applied to any joint structure.

  In addition, in the said embodiment, although the specific example of what applied this invention to the air connector for motor vehicles, its joining structure, and the joining method of the resin component of this air connector was shown, this invention has other three pieces. Of course, the present invention can be advantageously applied to any of the resin parts in which the above resin parts are integrally joined by vibration welding, a joining structure thereof, and a joining method of three resin parts. .

  In addition, although not enumerated one by one, the present invention can be carried out in a mode to which various changes, modifications, improvements, etc. are added based on the knowledge of those skilled in the art. It goes without saying that all are included in the scope of the present invention without departing from the spirit of the present invention.

It is longitudinal section explanatory drawing which shows the air connector as one Embodiment of the resin product which has a junction part structure according to this invention. FIG. 2 is an enlarged explanatory view of a II part of the air connector shown in FIG. 1. It is explanatory drawing which shows an example of the process of joining three resin components which comprise the air connector shown by FIG. 1, Comprising: The state which mutually overlap | superposed the air connector main body and the joint pipe is shown. It is explanatory drawing which shows the process implemented following FIG. 3, Comprising: The state which joined the air connector main body and the joint pipe by vibration welding is shown. It is explanatory drawing which shows the process implemented following FIG. 4, Comprising: The state which accumulated the cover panel with respect to the air connector main body with which the joint pipe was joined is shown. It is a figure corresponding to FIG. 2 which shows another embodiment of the resin product which has a junction part structure according to this invention. It is a figure corresponding to FIG. 2 which shows another embodiment of the resin product which has a junction part structure according to this invention. It is a figure corresponding to FIG. 2 which shows other embodiment of the resin product which has a junction part structure according to this invention. It is a figure corresponding to FIG. 2 which shows the resin product which has the conventional junction part structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Air connector 12 Connector main body 14 Joint pipe 16 Cover plate 24, 32 Joint flange part 26, 34 Joint surface 28 First joint protrusion 40 Opposing surface 42 Second joint protrusion 44 Joint part 52 First burr stopper Upper rib 54, 60, 80, 82 Clearance 56 First deburring lower rib 62 Burr 64, 72 Second deburring inner rib 66, 74 Second deburring outer rib 70 Recess

Claims (5)

The first resin component and the second resin component each have a first integrally formed by projecting in the first direction on at least one of the opposing surfaces facing each other in the first direction. A third resin component separate from the second resin component, while the vibration-welding is performed by superimposing at least one of the opposing surfaces of the bonding protrusions on the other, The first resin component is integrally formed to protrude in the second direction on at least one of the opposing surfaces facing each other in a second direction different from the first direction. The first resin component and the second resin component are overlapped with at least one of the opposing surfaces of the second bonding protrusions and welded by vibration. Bonding the third resin part to each other Burr generated by vibration welding of the first bonding protrusions protrudes from between the opposing surfaces of the first resin component and the second resin component. The first burr stopper rib to be prevented and the burr generated by vibration welding of the second bonding protrusion protrude from between the opposing surfaces of the first resin part and the third resin part. A resin product joint structure provided with a second burr stopper rib to prevent
The first burr stopper rib may be connected to a side surface of the first bonding projection and a predetermined surface with respect to at least one of the opposing surfaces of the first resin component and the second resin component. In a state where the gap is spaced apart, the rib is integrally formed so as to protrude in the first direction and extend along the side surface of the first joining protrusion, and at least a part of the second burr stopper rib is Two resin parts are integrally formed so as to protrude in the second direction and extend along the side surface of the second joint projection with a predetermined gap from the side surface of the second joint projection. Resin product joint structure characterized by that.   The first deburring rib is integrally formed on a surface of the first resin component facing the second resin component, and facing the third resin component of the first resin component. The joint structure of a resin product according to claim 1, wherein a surface includes a side surface of the first burr-stop rib.   Between the front end surface of the first deburring rib and the facing surface of the second resin component with respect to the first resin component, the first bonding protrusion and the second deburring rib A recess that is in communication with the gap positioned between the second engagement protrusion and the first burr stopper rib. The joint structure of a resin product according to claim 2, wherein: A resin product comprising a joint part formed by mutually joining a first resin part, a second resin part and a third resin part made of separate members independent of each other by vibration welding,
A resin product comprising the joint structure according to any one of claims 1 to 3. A method of joining the first resin component, the second resin component, and the third resin component made of separate members independent from each other by vibration welding,
The first resin component and the second resin component each have at least one of the opposing surfaces facing each other in the first direction and project in the first direction to be integrated. The front end surface of the formed first bonding projection is superimposed on at least one of the other opposing surfaces, and the first direction is separated from the side surface of the first bonding projection by a predetermined gap. And a first burr stopper rib integrally formed on the at least one opposing surface so as to extend along the side surface of the first joint protrusion, and to the at least one other opposing surface. In a state of being opposed to each other, the first bonding protrusion is vibration welded to the facing surface on which the first protrusion is overlapped, so that the burr generated by the vibration welding is caused by the first resin component and the second resin. Mutually facing surfaces with resin parts The first resin component and the second resin component are joined to each other while being prevented from protruding, and at least the second resin component of the first resin component and the second resin component After the second deburring rib formed integrally with the first protrusion protrudes in a second direction different from the first direction,
The first resin component and the third resin component each have at least one of the facing surfaces facing each other in the second direction, projecting in the second direction, The tip end surface of the integrally formed second bonding projection is superimposed on at least one of the other opposing surfaces, while projecting in the second direction and at least partially on the second resin component The second deburring rib is integrally positioned so as to extend along the side surface of the second joint projection with a predetermined gap from the side surface of the second joint projection. By virtue of the vibration welding, the second bonding projection is vibrated on the facing surface on which the second bonding projection is overlapped with the facing surface of the three resin parts facing the first resin component. The generated burr is the first A resin component characterized in that the first resin component and the third resin component are bonded to each other while preventing the oil component and the third resin component from protruding from the mutually opposed surfaces. Joining method.

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