JP3813109B2 - Resin parts joining method and structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joining technique suitable when, for example, a vehicle instrument panel is manufactured by vibration welding and joining a plurality of resin parts.
[0002]
[Prior art]
Conventionally, for example, as a technique for vibration welding and joining three resin parts, the technique of an instrument panel as shown in FIG. 7 and FIG. 8 of Japanese Patent No. 3050056 is known, and this structure is shown in FIG. As described above, the intermediate panel 53 is sandwiched between the outer panel 51 and the inner panel 52, and the protrusion 52 t of the inner panel 52 inserted through the hole h of the intermediate panel 53 is vibration welded and joined to the back surface of the outer panel 51.
In addition, as a technique for manufacturing an instrument panel by joining three resin parts, for example, a joining method as shown in FIG. 5 is also known. In this technique, the front panel 54 and the rear panel 55 are fastened by a tapping screw 56. After the coupling, the welding ribs of the duct part 57 are brought into contact with each other, and vibration is applied to the duct part 57 by the vibrating body 58, whereby the front panel 54 and the duct part 57 are joined by vibration welding.
Further, as a method of joining three resin parts other than the above-described method, a joining method in which two resin parts are first vibration welded and then a third resin part is vibration welded to the joint parts can be considered.
[0003]
[Problems to be solved by the invention]
However, in the case of the former patent No. 3050056, it is the inner panel 52 and the outer panel 51 that are vibration welded, and the intermediate panel 53 is only sandwiched between the two, so the three are not firmly joined. There is a problem.
Further, in the latter joining method using the tapping screw 56 and the joining method in which vibration welding is performed twice, there is a problem that at least two steps of joining work are necessary, and efficient work cannot be performed. In the joining method using the tapping screw 56, there is a problem that not only the number of parts increases, but also the recyclability deteriorates.
[0004]
Therefore, in the present invention, when the three resin parts are integrally joined, the three members are firmly maintained in the joining strength, the joining work can be performed efficiently, the recyclability is improved, and the number of parts is increased. The purpose is to make it possible to reduce the amount of energy consumption.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention integrates three resin parts by vibrating and welding a vibration resin part to which vibration is applied by bringing a welded part of two resin parts at least partially in contact with each other. In the joining method, the insertion part is provided in the vicinity of the welding rib as the welding part of the resin part on one side, and the resin on the other side is passed through the insertion part. Two resin parts can be obtained by inserting welding ribs as welded parts of the parts and bringing the tip of each welding rib into contact with the same surface side of the vibration resin parts and vibrating the vibration resin parts. Was vibration welded to the vibration resin parts at the same time.
[0006]
Here, in vibration welding, the welding rib is melted by frictional heat by vibrating the vibrating resin component in a state where the welding rib as a welding portion of another resin component is in contact with the vibrating resin component. However, the welding strength of each of the three resin parts can be firmly maintained by simultaneously welding the welding ribs of the two resin parts to be superposed on the vibration resin parts at the same time.
Moreover, by setting the position of the welding rib as a welding part of each resin component to the vicinity, both can be joined by one vibration welding work, and the work efficiency can be improved.
[0007]
In the present invention, the three resin parts are joined together by vibration welding of a welding rib as a welded part of two resin parts that are at least partially overlapped to a vibration-exposed resin part to which vibration is applied. In the bonded structure, one of the two resin parts to be overlaid is provided with welding ribs as a plurality of welded portions that are vibration welded and bonded to the vibration resin part, and each weld An insertion portion is provided in the middle portion of the rib for use, and the resin component on the other side is vibration welded and joined to the vibration resin component via a welding rib as a welding portion through which the insertion portion is inserted.
[0008]
Thus was fusion bonded at the bonding ribs on one side a plurality of locations of resin components, and through the insertion portion formed in an intermediate portion of these welding ribs, is inserted through the bonding ribs of the resin component of the other side welding If it joins, a three-way joining can be made more firm and rigidity can be improved.
[0009]
In the present invention, at least one of the two resin components to be superposed is provided with positioning means for positioning the other resin component.
If the positioning means is provided in this way, the two resin parts can be joined to each other at an accurate position without causing the positions of the two resin parts to be shifted while the vibration resin parts are vibrated and joined.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings.
Here, FIG. 1 is an explanatory view of an instrument panel, (a) is a state diagram before joining components, (b) is an explanatory view of a completed state, and FIG. 2 is an AA portion of FIG. 1 (b). FIG. 3 is an explanatory diagram showing an image of a joint portion.
[0011]
The method for joining resin parts according to the present invention is such that, when joining three resin parts together, the three members are firmly maintained in joining strength and can be joined efficiently. It is applied to the production of instrument panels.
[0012]
That is, as shown in FIG. 1A, a vehicle instrument panel 1 includes a duct part 2 as a vibration resin part and a front panel part 3 which is a resin part on one side of two resin parts to be superimposed. And an instrument panel 1 as shown in FIG. 1 (b) by being joined by the joining method according to the present invention. It is assembled as a finished product.
[0013]
Then, in the joint portion where the three members are joined, as shown in FIG. 2, the welding rib 4 y as a welded portion protruding from the rear surface of the rear panel component 4 is inserted through the insertion hole 3 h of the front panel component 3. In addition, welding ribs 3y as welding portions are projected from both side back surfaces of the front panel part 3 sandwiching the insertion hole 3h.
[0014]
Further, the insertion hole 3h of the front panel part 3 is formed in a hole shape that tapers toward the back surface side, and in the vicinity of the insertion hole 3h, a horizontal portion s that runs substantially horizontally and oblique to the front surface side. A standing wall portion t is formed to rise.
On the other hand, the welding rib 4y of the rear panel component 4 is tapered at the tip in accordance with the hole shape of the insertion hole 3h, and a back rib 4m as a positioning means is provided on the back surface side of the rear panel component 4. The retaining rib 4m is shaped to follow the upright wall portion t and the horizontal portion s, contacts the side surface of the moving rib 4m with the standing wall portion t, and contacts the lower surface of the moving rib 4m with the horizontal portion s. By doing so, the relative positioning of the rear panel part 4 and the front panel part 3 is appropriately performed.
In addition, when this is expressed as an image, it is as shown in FIG.
[0015]
Then, when the alignment rib 4m of the rear panel part 4 is overlapped with the front panel part 3 and the welding rib 4y is inserted through the insertion hole 3h of the front panel part 3, the tip of the welding rib 4y is placed on the front panel. The tip of the welding rib 3y of the component 3 is made to be substantially flush with the tip of the welding rib 3y, 4y, and the rear panel component 4 is applied toward the front panel component 3 side. At the same time, the duct component 2 is vibrated by the vibrating body 5 (FIG. 2), whereby the welding ribs 3y and 4y are melted by frictional heat, and vibration welding is performed.
[0016]
During this time, the rear panel part 4 is pressurized toward the front panel part 3, the positioning rib 4 m and the horizontal part s come into contact with each other, and the rear panel part 4 and the front panel part 3 are accurately positioned in the vertical direction. The positioning rib 4m and the standing wall portion t are in contact with each other and positioning in the horizontal direction is also accurately performed. When the vibration welding joining is finally completed, the relative positions of the three are accurately joined.
Further, since the rear panel part 4 and the front panel part 3 are vibration welded to the duct part 2, the bonding strength is maintained. Further, since the welding ribs 4y of the rear panel component 4 are welded to the intermediate portions of the welding ribs 3y at a plurality of locations on the front panel component 3, it is possible to achieve a solid joint and increase rigidity.
[0017]
In the above description, only one joint location between the rear panel component 4 and the front panel component 3 has been described, but a plurality of such joint locations are provided at appropriate positions.
[0018]
And if it joins by the above vibration welding, while working man-hours will be reduced, the number of parts will be reduced, the recyclability will be improved, and the joint quality will be improved.
[0019]
The present invention is not limited to the above embodiment. What has substantially the same configuration as the matters described in the claims of the present invention and exhibits the same operational effects belongs to the technical scope of the present invention.
For example, the approach rib 4m as positioning means provided on the front panel part 3 is merely an example, and positioning means may be provided on both the front panel part 3 and the rear panel part 4.
Further, the insertion hole 3h of the front panel component 3 may be an existing through hole or a hollowed end face.
Furthermore, it goes without saying that the resin component can be applied to components other than the instrument panel 1.
[0020]
【The invention's effect】
As described above, according to the present invention, in a joining method in which two resin parts are joined to a vibration resin part by vibration welding and three resin parts are integrated, one of the two resin parts is a resin part. of an insertion portion provided in the vicinity of the bonding ribs as welded portion, on the other side through the insertion portion together with inserting the bonding ribs as welded portion of the resin component, of the tip of each welding rib vibration resin component Since the two resin parts are simultaneously welded to the vibration resin part by abutting on the same surface side , the three resin parts can be firmly joined and the efficiency of the joining work can be improved.
In this case, provided with a welding rib as welding portion of the plurality of positions on one side of the resin part, an insertion part provided in an intermediate portion thereof, in the insertion portion, the bonding ribs as welded portion of the resin component of the other side By inserting the, it is possible to make the joining of the three parties more firm and increase the rigidity.
Moreover, if positioning means for positioning the resin part on the other side is provided on at least one resin part of the two resin parts, the vibration resin part is vibrated while performing the joining operation. It is possible to join the two resin parts at an accurate position without shifting.
[Brief description of the drawings]
FIG. 1 is an explanatory view of an instrument panel, (a) is a state diagram before joining components, (b) is an explanatory view of a completed state, and FIG. 2 is an AA portion of FIG. 1 (b). State diagram at the time of joining [FIG. 3] An explanatory diagram showing an image of a joint part [FIG. 4] An explanatory diagram of a conventional joining method [FIG. 5] An explanatory diagram of another conventional joining method
DESCRIPTION OF SYMBOLS 1 ... Instrument panel, 2 ... Duct component, 3 ... Front panel component, 3h ... Insertion hole, 3y ... Welding rib, 4 ... Rear panel component, 4y ... Welding rib, 4m ... Shifting rib.

Claims (3)

This is a joining method in which three resin parts are joined together by bringing the welded part of two resin parts, at least a part of which is overlaid, into contact with a vibration-exposed resin part to which vibration is applied, and making vibration welding. Of the two resin parts to be superposed, an insertion part is provided in the vicinity of the welding rib as the welding part of the resin part on one side, and the welding as the welding part of the resin part on the other side is made through this insertion part . with inserting the rib, the tip of each welding rib is abutted on the same side of the vibrating resin components, by vibrating the vibration resin component, at the same time the two resin components in excitation resin component vibration A method for joining resin parts, characterized by welding. A welded structure in which three resin parts are integrally joined by vibration welding of a welded part of two resin parts that are at least partially overlapped to a vibration-excited resin part to which vibration is applied, Of the two resin parts to be combined, the resin part on one side is formed on a welding rib as a plurality of welding parts to be vibration welded and joined to the vibration resin part, and an intermediate part of each welding rib. The resin part on the other side is provided with an insertion part, and is vibration welded and joined to the same surface side of the vibration resin part via a welding rib as a welding part through which the insertion part is inserted. Bonding structure of resin parts.   The resin part joining according to claim 2, wherein positioning means for positioning the resin part on the other side is provided on at least one of the two resin parts to be superposed. Construction.

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