Vibration welded article, vibration welding apparatus, and method of manufacturing vibration welded article

1. A vibration welded article comprising:

an outer member including a substantially V-shaped portion; and

an inner member disposed inside the substantially V-shaped portion of the outer member and vibration welded to the outer member,

the outer member including a substantially plate-shaped base surface portion, and a slope portion formed obliquely relative to the base surface portion and facing the base surface portion,

the slope portion including an outer member opening which is opened to attach another component, and

the inner member including a first joint surface portion that is vibration welded to the base surface portion, a second joint surface portion that is vibration welded to the slope portion, and at least one protrusion that protrudes from the second joint surface portion toward the base surface portion.

2. The vibration welded article according to claim 1 , wherein the inner member further includes a standing wall portion which stands from the first joint surface portion to the second joint surface portion, and

the standing wall portion includes an inner member opening which is opened at a position facing the outer member opening.

3. The vibration welded article according to claim 1 , wherein when an imaginary surface, which is parallel to the base surface portion and extends from one of edges of the outer member opening closest to the second joint surface portion, is taken as a reference surface, the at least one protrusion protrudes to a position closer to the base surface portion than the reference surface.

4. The vibration welded article according to claim 1 , wherein a distal end surface of the at least one protrusion is present on a surface intersecting the second joint surface portion.

5. The vibration welded article according to claim 1 , wherein the at least one protrusion includes a plurality of parallel protrusions formed at a plurality of positions.

6. A vibration welding apparatus for manufacturing the vibration welded article according to claim 1 , the vibration welding apparatus comprising:

a receiving mold on which the outer member is placed;

a vibrating mold for pressing the first joint surface portion toward the base surface portion and generating vibrations to vibration weld the first joint surface portion to the base surface portion;

a pressing mold for pressing the slope portion toward the second joint surface portion; and

a moving mold movable from the outer member opening toward the at least one protrusion and capable of abutting against the at least one protrusion.

7. A method of manufacturing the vibration welded article according to claim 1 , wherein the slope portion and the at least one protrusion are kept sandwiched when the inner member is welded to the outer member.

8. A method of manufacturing the vibration welded article according to claim 1 , the method comprising:

placing the outer member and the inner member on a top surface of a receiving mold;

lifting the receiving mold to a position where the first joint surface portion abuts against a vibrating mold;

causing a moving mold to enter the outer member opening, and arranging the moving mold such that an upper surface of the moving mold is able to abut against the at least one protrusion;

swinging the pressing mold until the pressing mold abuts against the slope portion; and

operating the vibrating mold to vibration weld the inner member to the outer member.