JP3392803B2 - Vibration welding equipment - Google Patents

Description

BACKGROUND OF THE INVENTION [0001] 1. Technical Field of the Invention The present invention relates to vibration welding equipment for integrating a plurality of synthetic resin members. 2. Description of the Related Art Two superposed synthetic resin members are sandwiched between an upper jig and a lower jig to reduce vertical pressing force and horizontal vibrating force. There is known a technique in which frictional heat is generated by rubbing the contact surfaces of two members in addition to between the components, and the two members are welded to each other with this (see Japanese Patent Application Laid-Open No. 11-34169). However, in the conventional vibration welding method, two synthetic resin members are individually mounted on an upper jig and a lower jig, respectively, and then the lower jig is raised. Thus, the two members are brought into contact with each other, and thereafter, the upper jig is vibrated to integrally connect the two members. Therefore, the present invention is effective only for an object having a shape that can be simply overlapped from one direction. For example, it is substantially impossible to weld an object having a stepped discontinuous surface. There were considerable restrictions on the product shape. [0004] The present invention has been devised to solve such problems of the prior art, and its main objects are as follows.
For example to provide a vibration welding equipment capable of also be prepared a product having a portion of undercut cross-sectional shape. [0005] In order to achieve the above object, the present invention provides a device which is relatively movable in a first direction.
And a relative vibration in a second direction substantially orthogonal to the first direction.
First and second jigs (upper jig 12, lower jig,
13), the first jig is
The first synthetic resin member (inner member 6) faces each other.
It has a part that supports each of the inner surfaces (U-shaped cross section 5).
The second jig is provided with a second synthetic resin member (outer).
Overlap with the first synthetic resin member in member 8)
To support the outer surface of the touched portion (V-shaped cross-section 7),
A plurality of parts that are divided and
It had parts (a main part 13m and a sub part 13s). With this arrangement, when the two jigs are moved toward and away from each other, the plurality of portions of the second jig are moved between the plurality of portions, so that the portion having an undercut cross-sectional shape is formed. And avoid interference. The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a rear perspective view of a vehicle including a tailgate spoiler to which the present invention is applied. The tailgate spoiler 1 is attached to the upper edge of the tailgate 2 and, as shown in FIG. 2 (in FIG. 2, shown upside down when the vehicle is mounted), the top surface of the roof 3 And a rear portion 1r having an undercut cross-sectional shape between the rear window 4 and the rear window 1r. In addition, this tailgate spoiler 1 has U
An inner member 6 having a U-shaped cross section 5 and a V that can receive the U-shaped cross section 5 of the inner member 6 between inner surfaces facing each other.
And an outer member 8 having a U-shaped cross section 7 and integrated by a vibration welding method to form an eaves-shaped rear portion 1r.
A hollow closed section 9 is formed at the bottom. Hereinafter, a method of manufacturing the tailgate spoiler 1 will be described. First, before being mounted on the vibration welding machine, the inner member 6 and the outer member 8 are temporarily connected in advance (see FIG. 2). At an appropriate position on the surface of the outer member 8 facing the inner member 6, a projection 11 that can be engaged with a long hole 10 formed in the inner member 6 is provided so as to protrude so that the two are not separated from each other. It is held (see FIG. 6). In addition, slot 1
0 is a length in which both members can be relatively displaced by an amplitude in the vibration direction. Then, the tailgate spoiler 1 in which the inner member 6 and the outer member 8 are temporarily connected is turned upside down with respect to the time of mounting the vehicle body, that is, with the surface facing downward when mounting the vehicle body facing upward. 12 (see FIG. 3). The upper jig 12 includes a portion 12a for supporting each of the inner surfaces of the U-shaped cross section 5 of the inner member 6 facing each other and a front portion 1a.
and a portion 12b for supporting f. While the tail gate spoiler 1 is mounted on the upper jig 12, the lower jig 13 is raised, and the lower jig 13 is pressed against the surface of the tail gate spoiler 1 facing downward (see FIG. 4). . The lower jig 13 is mounted on the upper jig 12 and has a main portion 13m for supporting the entire surface of the outer member 8 facing downward, the U-shaped cross section 5 of the inner member 6 and the outer member 8. And a sub-portion 13s for supporting a portion located above the overlapping portion with the V-shaped cross section 7. The main portion 13m and the sub-portion 13s are linked to each other, and the sub-portion 13s is tiltably driven by an appropriate actuator such as an air cylinder (not shown). When raising the lower jig 13, the sub-portion 13 s is opened so as not to interfere with the rear portion 1 r of the tailgate spoiler 1 attached to the upper jig 12 (the configuration of FIG. 3). When it contacts the outer member 8, the sub-portion 13s is closed, and the rear portion 1r is pressed from both upper and lower directions (see FIG. 4). In this state, a relative horizontal vibration is applied between the upper jig 12 and the lower jig 13 to slide the inner and outer members 6, 8 by the vibration amplitude. The space between the inner and outer members 6, 8 is
The entire surfaces are not in contact with each other, but are in contact via a trapezoidal cross-section rib 14 extending in the vibration direction, as shown in FIG. When the top of the rib 14 is melted by the frictional heat, the rib 14 is crushed by the pressing force applied between the upper and lower jigs 12 and 13. When the crush amount of the rib 14 reaches a predetermined value, the vibration is stopped, and the molten portion is cooled while maintaining the stationary state. By setting the thickness of the outer member 8 located on the outside to be larger than the thickness of the inner member 6 (t1> t2), "sink" due to heat of fusion occurs on the outer surface without increasing the finished weight. Can be suppressed. If the molten portion is cooled and solidified and the inner and outer members 6 and 8 are integrated, the upper and lower jigs 1
The finished product is taken out by separating 2 and 13 (see FIG. 5). As described above, according to the present invention, a plurality of members are temporarily joined in advance and mounted on a jig, so that the members are folded back into a U-shape or a V-shape as shown in the above embodiment. Even a relatively complicated cross-sectional shape having a portion can be integrated by vibration welding, and a great effect can be achieved in expanding the applicable range of the vibration welding method.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a rear perspective view of a vehicle equipped with a tailgate spoiler according to the present invention. FIG. 2 is a longitudinal sectional view of a tailgate spoiler to which the present invention is applied. FIG. Explanatory drawing of the welding process showing the stage where the tailgate spoiler is mounted [Fig. 4] Explanatory diagram of the welding process showing the stage where the tailgate spoiler is inserted between the upper jig and the lower jig [Fig. 5] The stage of taking out the finished product FIG. 6 is an enlarged cross-sectional view of a temporary connection portion between an inner member and an outer member. FIG. 7A is an enlarged side cross-sectional view of a welded portion between an inner member and an outer member. Enlarged front sectional view of welded portion between inner member and outer member [Description of References] 1 Tail gate spoiler 5 U-shaped cross section 6 Inner member 7 V-shaped cross section 8 Outer member 12 Upper jig 13 Lower jig

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-3-162938 (JP, A) JP-A-3-187730 (JP, A) JP-A-7-195559 (JP, A) JP-A-9-95 177624 (JP, A) JP-A-11-34169 (JP, A) JP 5-77493 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B29C 65/00-65 / 82 B23K 20/00-20/26

Claims (1)

(57) Claims: First and second treatments which are relatively close to and separated from each other in a first direction and are relatively vibratingly displaceable in a second direction substantially orthogonal to the first direction. The first jig has a portion for supporting each of the inner surfaces of the first synthetic resin member facing each other, and the second jig has a second jig. A vibration welding apparatus, comprising: a plurality of portions which are divided from each other and are relatively movably combined to support an outer surface of a portion of the synthetic resin member overlapped with the first synthetic resin member.