JP2002361745A - Vibration-welded structure of resin-made construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration-welded structure which is free from the deterioration of a joining quality when a resin-made structure is constituted by vibration-welding a pair of joining members having a plurality of inclined parts slanting in the same direction as a pressurizing direction during vibration- welding or a single inclined part slanting in the pressurizing direction, formed on a part of the joining face respectively. SOLUTION: In order to start a welding/joining work at regions excepting the inclined parts 21a and 22a ahead of regions corresponding to the inclined parts 21a and 22a, the height of weld beads 23 and 24 in a direction along the pressurizing direction 14 at the regions corresponding to the inclined parts 21a and 22a, is set lower than the height of the welded beads 23 and 24 at the regions excepting the inclined parts 21a and 22a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a plurality of inclined portions inclined in the same direction with respect to the pressing direction during vibration welding or a single inclined portion inclined with respect to the pressing direction. Opposite joining surfaces are provided on a pair of joining members made of synthetic resin, respectively, with respect to a resin structure configured by vibration welding a welding bead provided on at least one of both joining surfaces to the other joining surface, In particular, it relates to the improvement of the vibration welding structure.

[0002]

2. Description of the Related Art Conventionally, in such a vibration welding structure for a resin structure, as disclosed in Japanese Patent Application Laid-Open No. Hei 5-177712, the height of the weld bead in the direction along the pressing direction is increased. Generally, it is set to be the same over the entire length of the joining surface of the joining member.

[0003]

However, in the above-described conventional apparatus, when the pair of joining members are subjected to vibration welding, distortion and molding error of the joining members are caused due to distortion and molding error of the joining members. In the weld bead provided on at least one side, a portion corresponding to the inclined portion may come into contact with the other joining surface side prior to a portion excluding the inclined portion, and in such a case, the two joining portions may be used. With the mutual pressurization of the members, both joining members are shifted along the slope of the joining surface,
In some cases, the joining quality may be degraded. In particular, unlike a structure having contradictory inclined portions, when a plurality of inclined portions or a single inclined portion are inclined in the same direction, a significant shift may occur.

[0004] The present invention has been made in view of such circumstances, and a plurality of inclined portions inclined in the same direction with respect to the pressing direction during vibration welding or a single inclined portion inclined with respect to the pressing direction. Provided is a vibration welding structure for a resin structure in which a pair of bonding members each having an inclined portion on a part of a bonding surface are vibration welded to form a resin structure, thereby preventing a decrease in bonding quality. The purpose is to do.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a plurality of inclined portions inclined in the same direction with respect to the pressing direction at the time of vibration welding, or inclined portions with respect to the pressing direction. Opposite joining surfaces each having a single inclined portion are provided on a pair of joining members made of synthetic resin, and a welding bead provided on at least one of the two joining surfaces is vibration-welded to the other joining surface. In the resin structure constituted by, in order to start the welding joining at the part except the inclined part at the time of the vibration welding, prior to the part corresponding to the inclined part, at the part corresponding to the inclined part The height of the weld bead in the direction along the pressing direction is set to be lower than the height of the weld bead at a portion other than the inclined portion.

According to such a configuration, when the pair of joining members are subjected to vibration welding while pressing each other, even if there is a distortion or a molding error when the joining members are clamped,
A portion corresponding to the inclined portion of the weld bead does not come into contact with the other joining surface side prior to the portion excluding the inclined portion, and therefore, both joining members are shifted in a direction along the inclined portion. Can be prevented, and good joining quality can be obtained without displacement of both joining members.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on one embodiment of the present invention shown in the attached drawings.

1 to 6 show one embodiment of the present invention. FIG. 1 is a perspective view of a resin structure, FIG. 2 is a plan view of the resin structure, and FIG. 3 is a first joining member. FIG. 4 is a perspective view of the second joining member as viewed from above. FIG. 5 is a cross-sectional view of the first and second joining members before vibration welding, taken along line 5-5 in FIG. FIG. 6 and FIG. 6 are cross-sectional views showing the first and second joining members before vibration welding along the line 6-6 in FIG.

First, in FIGS. 1 and 2, the resin structure 11 is formed in a rectangular box shape so that it can be used as, for example, a resonance chamber of a vehicle engine or a surge tank. First and second joining members 12 and 13 made of thermoplastic synthetic resin
Are subjected to vibration welding with each other in a state where a pressing force is applied in a pressing direction indicated by an arrow 14, thereby forming the resin structure 11.

At one end surface of the resinous structure 11, an introduction hole 15 for introducing air or the like into the resinous structure 11 is provided, and a partition wall 16 is provided inside the resinous structure 11. Provided. This partition wall 16 is for defining a chamber capable of silencing in a plurality of frequency bands in the case of, for example, a resonance chamber. This is a so-called center feed partition wall distributed to the intake pipe.

As shown in FIG. 3, the first joint member 12 constituting the upper part of the resin structure 11 is formed in a box shape having an open lower part. An outwardly extending flange 17 is provided integrally. Also, a second joining member 13 constituting a lower portion of the resin structure 11
4 is formed in a box shape with an open top as shown in FIG. 4, and a flange 18 corresponding to the flange 17 of the first joint member 12 is formed on the outer opening end of the second joint member 13 on the outer side. It is provided integrally so as to protrude.

Referring to FIGS. 5 and 6, the first joining member 12 has a wall portion 1 which forms a part of a partition wall 16.
9 are integrally provided so as to protrude toward the second joining member 13. The second joining member 13 includes the first joining member 1.
The wall portion 20 which forms the partition wall 16 together with the second wall portion 19
Are provided integrally.

The first joining member 12 is formed so that the joining surface 21 extending over the flange 17 and the wall 19 is opposed to the second joining member 13. In the portion corresponding to the above, a part of the bonding surface 21 is formed as an inclined portion 21 a inclined with respect to the pressing direction 14.

On the other hand, the second bonding member 13 has a bonding surface 22 facing the bonding surface 21 of the first bonding member 12, and the bonding surface 21 of the first bonding member 12 has an inclined portion 21a. Therefore, a part of the joining surface 22 corresponding to the wall portion 20 is formed as an inclined portion 22a corresponding to the inclined portion 21a of the joining surface 21.

A welding bead 23 having a flat front end surface is provided at the center in the width direction of the bonding surface 21 of the first bonding member 12.
Are integrally provided so as to protrude toward the second joining member 13. In addition, a welding bead 24 corresponding to the welding bead 23 is integrally provided at the center in the width direction of the joining surface 22 of the second joining member 13 so as to protrude toward the first joining member 12. Is set wider than the welding bead 22 of the joining flange 20.

Further, on the joining surface 21 of the first joining member 12,
Endless regulating walls 25 and 26 are provided integrally so as to sandwich the welding bead 23 from inside and outside so as to protrude toward the second joining member 13.

Incidentally, the first and second joining members 12,
When the first and second joining members 12 and 13 are mutually welded by vibration welding, for example, the first and second joining members 12 and 13 are pressed in a pressing direction 14 toward the second joining member 13 by pressing the first and second joining members 12 and 13 together. In a state where the tip of the weld bead 23 is pressed against the weld bead 24, the first and second joining members 1
One of the members 2 and 13, for example, the second joining member 13 is vibrated at a high speed. Accordingly, the welding bead 23 is vibration-welded to the welding bead 24 by frictional heat generated between the welding beads 23, 24, and the first and second joining members 12, 13 are joined.

The two regulating walls 2 of the first joining member 13
5 and 26 are connected to the joining surface 22 of the first joining member 12 by the tip thereof.
In addition to serving as a guide for stopping the vibration welding process in a state where the welding and joining of the two joining members 12 and 13 have progressed to positions close to and opposed to the welding beads 23 and 2,
4 is vibration-welded to the inside and outside of the first and second joining members 12 and 13, that is, the resin structure 1.
It functions to prevent it from protruding out of one.

Incidentally, the first and second joining members 12,
13 has a single inclined portion 21a, 22a which is inclined with respect to the pressing direction 14, so that the first and second joining members 1 during vibration welding are formed.
The heights HA ', H of the weld beads 23, 24 at the inclined portions 21a, 22a along the pressing direction 14 are set in order to prevent the occurrence of displacement along the inclined portions 21a, 22a.
B ′ (see FIG. 5) is smaller than the heights HA, HB of the weld beads 23, 24 along the pressing direction 14 on the joining surfaces 21, 22 other than the inclined portions 21a, 22a (HA>
HA ', HB>HB').

Next, the operation of this embodiment will be described. The first and second joining members 12 and 13 constituting the resin structure 11 have a single inclined with respect to the pressing direction 14 at the time of vibration welding. Surfaces 21 and 22 having inclined portions 21a and 22a, respectively, are provided.
In this embodiment, the vibration welding is performed such that the welding beads 23 and 24 provided on at least one of the welding beads 1 and 22 are welded to each other.

At this time, the welding beads 23 at the portions corresponding to the inclined portions 21a and 22a of the two joining surfaces 21 and 22 are formed.
If the contact 24 occurs earlier than portions other than the inclined portions 21a and 22a, the first and second joining members 12 and 13 are displaced along the inclined portions 21a and 22a, and the joining quality may be degraded. There is.

However, the heights HA ', H of the weld beads 23, 24 along the pressing direction 14 at the inclined portions 21a, 22a.
B ′ is the joint surface 21, other than the inclined portions 21 a, 22 a
2, the heights HA, HB of the weld beads 23, 24 along the pressing direction 14 are set smaller.

Therefore, the first and second joining members 12,
When the members 13 are subjected to vibration welding while pressing each other, the joining members 1
Even if there is a distortion or a molding error when the clamps 2 and 13 are clamped, the inclined portions 21 of the weld beads 23 and 24 are not affected.
The portions corresponding to a and 22a do not come into contact with each other before the portions other than the inclined portions 21a and 22a. As a result, it is possible to prevent the first and second joining members 12 and 13 from being displaced in the direction along the inclined portions 21a and 22a, and to eliminate the displacement between the two joining members 12 and 13 and to achieve good joining quality. Obtainable.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the appended claims. It is possible.

For example, in the above embodiment, the single inclined portions 21a, 22 inclined with respect to the pressing direction 14 during vibration welding.
a to the joining surface 2 of the first and second joining members 12 and 13
Although the description has been given of the case where each of the first and second joining members has a plurality of inclined portions inclined in the same direction with respect to the pressing direction 14, the present invention is also applied. can do.

[0026]

As described above, according to the present invention, it is possible to prevent the pair of joining members from shifting in the direction along the inclined portion, and to eliminate the shift between the two joining members to achieve good joining quality. Obtainable.

[Brief description of the drawings]

FIG. 1 is a perspective view of a resin structure.

FIG. 2 is a plan view of a resin structure.

FIG. 3 is a perspective view of the first joining member as viewed from below.

FIG. 4 is a perspective view of the second joining member as viewed from above.

FIG. 5 is a sectional view showing the first and second joining members before vibration welding, taken along line 5-5 in FIG. 2;

FIG. 6 is a sectional view showing the first and second joining members before vibration welding, taken along line 6-6 in FIG. 2;

[Explanation of symbols]

 11 ... resin structure 12, 13 ... joining member 14 ... pressing direction 21, 22 ... joining surface 21a, 22a ... inclined portion 23, 24 ... welding bead

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F211 AD05 AD23 AD24 AD26 AG07 AG23 AG28 AH17 TA01 TC08 TC14 TD07 TH02 TH06 TH18 TJ30 TN20 TQ05

Claims (1)

[Claims] 1. A plurality of inclined portions inclined in the same direction with respect to the pressing direction (14) during vibration welding or a single inclined portion (21a, 22) inclined with respect to the pressing direction (14).
opposing joining surfaces (21, 22) each having a)
Are provided on the pair of joining members (12, 13) made of synthetic resin, respectively, and the welding beads (23, 24) provided on at least one of the joining surfaces (21, 22) are vibration-welded to the other joining surface. In the resin structure constituted as described above, the inclined portions (21a, 22
a) welding at portions other than the inclined portions (21a, 2a).
In order to start prior to the part corresponding to 2a), the height of the weld bead (23, 24) at the part corresponding to the inclined part (21a, 22a) in the direction along the pressing direction (14) is increased. Is set to be lower than the height of the weld bead (23, 24) at a portion excluding the inclined portions (21a, 22a).