JP2000192923A - Installing structure of thermoplastic resin part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform positioning by absorbing positional dislocation of a boss and a hole, and to improve a degree of freedom of design and installing performance by setting the installing direction in the different direction to the welding direction in an installing structure by welding of a thermoplastic resin part. SOLUTION: In an installing structure mutually joined by welding a tip part of a boss 12 by inserting the boss 12 arranged in a thermoplastic resin part 11 into a hole 23 of the other part 21, an expansively opening-shaped guide groove 24 opening in an end part by continuing from the hole 23 is formed in the other part 21. The guide groove 24 is allowed to abut to the boss 12 from the side, and the boss 12 is fitted in the hole 23. Afterwards, a tip part of the boss 12 is welded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a thermoplastic resin part.

[0002]

2. Description of the Related Art When a thermoplastic resin part is fixed by welding (ultrasonic welding or thermal welding), conventionally, the mounting direction and the welding direction must be the same. FIG.
Shows an example of a conventional mounting structure of a thermoplastic resin part.
Of the boss 2 is inserted into the hole 4 of the other resin or metal part 3 and the tip of the boss 2 is welded 5 to join them together. In the drawings, the mounting direction and the welding direction are indicated by arrows.

[0003]

When the above-described welding is performed at a plurality of locations, for example, as shown in FIG.
The plurality of bosses 2, 2, 2 provided on the thermoplastic resin part 1 are
It is necessary to insert them into the holes 4, 4, 4 of the other resin or metal part 3, respectively. However, due to manufacturing errors, etc.
For example, as shown in FIG. 14, when the boss 2 and the hole 4 are misaligned, the boss 2 has to be inserted in accordance with the position of the hole 4, and the assembling property is poor.

Accordingly, an object of the present invention is to facilitate positioning by absorbing a misalignment between a boss and a hole by making the mounting direction different from the welding direction when the thermoplastic resin component is mounted by welding. Another object of the present invention is to provide a mounting structure that improves design flexibility and assemblability.

[0005]

According to a first aspect of the present invention, a boss provided on one thermoplastic resin part is inserted into a hole of the other part, and the leading end of the boss is inserted into the other part. By welding, in the mounting structure to be connected to each other,
The other part has a configuration in which a guide groove having an expanded shape that is continuously opened from the hole to the end is formed, and the guide groove is brought into contact with the boss from the side, and the boss is inserted into the hole. And

As described above, according to the first aspect of the present invention, the boss provided on the thermoplastic resin component is brought into contact with the expanded guide groove, which is open to the end of the other component, from the side. After the boss is inserted into the hole, the tip of the boss is welded and joined to each other. The gap can be absorbed and the boss and the hole can be easily positioned.

According to a second aspect of the present invention, a boss provided on one of the thermoplastic resin parts is inserted into a hole of the other part, and the tip of the boss is welded to connect with each other. , A rib-shaped boss is formed on one of the thermoplastic resin parts, and a slit-shaped open hole is formed on the other part, the rib-shaped boss being inserted into the slit-shaped open hole from the end. Configuration.

As described above, according to the second aspect of the present invention, the rib-shaped boss provided on the thermoplastic resin part is inserted from the end into the slit-shaped opening hole opened to the end of the other part. Since the mounting structure is such that the ends of the bosses are welded and joined together, the rib-shaped boss is inserted into the slit-shaped open hole from the end to absorb the positional deviation between the rib-shaped boss and the slit-shaped open hole. The rib-shaped boss and the slit-shaped open hole can be easily positioned. Since the rib-shaped boss is inserted into the slit-shaped open hole from the end, it is effective for mounting at a narrow portion in layout.

According to a third aspect of the present invention, there is provided a mounting structure for a thermoplastic resin part according to the second aspect, wherein the other part includes:
It is characterized in that a plurality of continuous grooves are formed around the slit-shaped open hole.

Thus, according to the third aspect of the present invention, since the other part of the second aspect is provided with a plurality of continuous grooves around the slit-shaped open hole, the ribs are formed at the time of welding. When the molten resin of the boss flows into the plurality of grooves continuous from the slit-shaped open hole, the anchor effect can be obtained.

According to a fourth aspect of the present invention, there is provided a mounting structure for a thermoplastic resin component according to the second aspect, wherein the other component includes:
It is characterized in that a plurality of small holes that are spaced apart from each other around the slit-shaped open hole are formed.

Thus, according to the fourth aspect of the present invention, the other component according to the second aspect is provided with a plurality of small holes which are spaced around the slit-shaped open hole, so that it can be used in welding. The molten resin of the rib-shaped boss flows into the plurality of small holes separated from the slit-shaped open hole to the periphery, thereby obtaining an anchor effect.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a mounting structure of a thermoplastic resin part according to the present invention; FIG.

<First Embodiment> FIG. 1 is a cross-sectional view showing a mounting structure of a thermoplastic resin part according to a first embodiment of the present invention, and FIG. FIG. 3 is a front view showing the shapes of the holes and the guide grooves. 1 to 3, reference numeral 11 denotes a thermoplastic resin part, 12 denotes a boss, 13, 14, and 15 denote ribs,
21 is a mounting part, 22 is a mounting piece, 23 is a hole, 24 is a guide groove, and 25 is a rib.

This embodiment is applied to a vehicle interior component mounting structure, for example, a vehicle interior component coupling portion between an upper and lower of a door lining, a pad mounting portion of an armrest, and the like. As shown in FIGS. 1 and 2, a boss 12 is formed on the thermoplastic resin component 11. The boss 12 is cylindrical in the illustrated example,
On its outer periphery, three ribs 13, 13, 1 at 90 ° intervals
3 and ribs 14 and 15 continuous in a T-shape.

On the other hand, the mounting part 21 is made of a resin such as thermoplastic or metal. This mounting part 21
1 and 3, a mounting piece 22 is formed. In the illustrated example, the mounting piece 22 is formed with a central circular hole 23 and a guide groove 24 that is open to the end portion following the circular hole 23. This guide groove 24
Has an expanded shape on both sides as shown in the figure.
A so-called “keyhole shape” is formed by the guide groove 24 and the circular hole 23 having such an expanded shape. Note that ribs 25 are formed on the left and right sides of the mounting piece 22.

Next, how to attach the thermoplastic resin component 11 and the attachment component 21 will be described. First, as shown by an arrow in FIG. 1, the mounting piece 22 is brought close to the boss 12 from the side, and the boss 12 is brought into contact with the guide groove 24, so that the boss 12 extends along the guide groove 24 having the expanded shape. The boss 12 is inserted into the hole 23. At this time, the ribs 13 and 1 around the boss 12
Attachment pieces 22 are seated on 3, 13, and 15 (see FIG. 5).

Then, as shown in FIG. 4, the welded portion 16 is formed by welding the tip of the boss 12 by ultrasonic welding (or heat welding). As shown in FIG. 5, the welded portion 16 has a shape in which the molten resin has flowed into the cylindrical portion of the boss 12 and the outer periphery of the hole 12 and has been solidified.

As described above, when the thermoplastic resin component 11 is attached to the attachment component 21 by welding, the boss 12 is formed in the expanded guide groove 2 from a direction different from the welding direction.
Since it is structured to be fitted into the hole 23 along the line 4, the positional deviation due to a manufacturing error or the like can be absorbed and the boss 12 and the hole 23 can be easily positioned. As a result, even in the case of a layout which can be connected only with a steel plate clip or a tapping screw, the connection by welding can be performed. Therefore,
The degree of freedom of design is expanded, the assembling property is improved, and automation can be easily performed, which can contribute to shortening of tact in a manufacturing process.

FIG. 6 shows a plurality of sets (3
2) is an exploded perspective view showing the case of FIG.
Three bosses 12 are provided at equal intervals on the thermoplastic resin part 11, and holes 23 and guide grooves 26 are formed at equal intervals on the mounting part 21 (mounting piece 22). In the illustrated example, the boss 12 has four ribs 1 on the outer periphery at 90 ° intervals.
The guide groove 26 has an expanded shape in which only one side is inclined, including 3, 13, 13 and 13.

As described above, even in the case where the boss 12 and the hole 23 are plural sets (three sets), each boss 12 is formed along each of the expanded guide grooves 24 and each hole 2
3 can be easily fitted. That is, for example, as shown in FIG. 7, even when the position of the boss 12 and the position of the hole 23 are misaligned, the boss 12 is pushed into each other to guide the boss 12 into the hole 23 by the guide action of the expanded guide groove 26. Can be positioned.

<Second Embodiment> FIG. 8 is a sectional view showing a mounting structure of a thermoplastic resin part according to a second embodiment of the present invention, and FIG. 9 shows a boss shape thereof. FIG. 10 is a front view showing a hole shape. 8 to 10, 31 is a thermoplastic resin part,
32 is a boss, 33 is a rib, 41 is a mounting part, 42 is a mounting piece, 43 is a hole, 44 is a groove, and 45 is a rib.

This embodiment is also applied to a mounting structure for a vehicle interior part, as in the first embodiment. As shown in FIG. 8 and FIG. 9, the boss 32 of the thermoplastic resin component 31 is a thin plate-shaped rib,
The rib-like boss 32 has four ribs 33, 33, 33, 33,
33 are formed.

On the other hand, as in the first embodiment described above, the mounting piece 42 of the resin or metal mounting part 41 has a center opening to the end as shown in FIGS. And the slit-shaped open hole 43
A total of six grooves 44, 4 with three on each side
4, 44,... Are formed. Note that ribs 45, 45 are formed on the left and right sides of the mounting piece 22, as in the above-described first embodiment.

Next, how to attach the thermoplastic resin part 31 and the attachment part 41 will be described. First, as shown by an arrow in FIG.
And the rib-shaped boss 32 is inserted into the slit-shaped open hole 43 from the end. At this time, the mounting pieces 42 are seated on the ribs 33, 33, 33 around the rib-shaped boss 32. Then, the tip of the rib-shaped boss 32 is welded by ultrasonic welding (or heat welding) to form a welded portion (not shown). The welded portion is formed by the molten resin flowing into each of the grooves 44, 44, 44,... On both sides of the slit-shaped open hole 43 and solidified.

As described above, when the thermoplastic resin part 31 is attached to the attachment part 41 by welding, the rib-shaped boss 32 is inserted into the slit-shaped open hole 43 from the end in a direction different from the welding direction. In particular, it is effective for mounting with a narrow component in layout. Then, by welding the rib-shaped bosses 32, the molten resin flows into and solidifies in each of the grooves 44, 44, 44,... On both sides of the slit-shaped open hole 43, and an anchor effect is produced.

<Modified Example> FIG. 11 shows a modified example. In this modified example, as shown in FIG.
Are formed in the small holes 46, 46, 46,.... As described above, the small holes 46, 46, 46,...
, 46, 46,... May be welded portions in which the molten resin flows around and is solidified.

In the above-described embodiment, the mounting structure of the vehicle interior parts is used. However, the present invention is not limited to this, and welding is performed when at least one of the parts is a thermoplastic resin part. It is applied to the entire mounting structure. Also, the shapes of the boss and the hole are arbitrary, and it goes without saying that the specific detailed structure and the like can be appropriately changed.

[0029]

As described above, according to the mounting structure of the thermoplastic resin component according to the first aspect of the present invention, the boss of the thermoplastic resin component has an expanded guide groove at the end of the other component. Abut from the side, insert the boss into the hole,
In order to weld the boss tip portion, by contacting the boss with the guide groove having an expanded shape from the side, the positional deviation between the boss and the hole can be absorbed and the boss and the hole can be easily positioned. Therefore, the degree of freedom in design can be improved, and the assemblability can be improved.

According to the second aspect of the present invention, the rib-shaped boss of the thermoplastic resin component is inserted from the end into the slit-shaped open hole at the end of the other component. After that, in order to weld the boss tip, the rib-shaped boss is inserted into the slit-shaped open hole from the end to absorb the positional deviation between the rib-shaped boss and the slit-shaped open hole, and the rib-shaped boss is welded. The slit-shaped open hole can be easily positioned. Therefore, the degree of freedom in design can be improved, and the assemblability can be improved. In addition, since the rib-shaped boss is inserted into the slit-shaped open hole from the end, there is obtained an advantage that it is effective for mounting at a narrow portion in layout.

According to the third aspect of the present invention, since a plurality of continuous grooves are formed around the slit-shaped open hole, the effect obtained by the second aspect can be obtained. Thus, at the time of welding, the molten resin of the rib-shaped boss flows from the slit-shaped open hole into a plurality of grooves continuous to the periphery, whereby an anchor effect can be obtained.

According to the thermoplastic resin component mounting structure according to the fourth aspect of the present invention, since a plurality of small holes spaced apart around the slit-shaped open hole are formed, the effect obtained by the second aspect of the present invention is improved. In addition, the anchor resin effect can be obtained by flowing the molten resin of the rib-shaped boss into the plurality of small holes spaced apart from the slit-shaped open hole at the time of welding.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a mounting structure of a thermoplastic resin component according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a boss shape of FIG. 1;

FIG. 3 is a front view showing a shape of a hole and a guide groove in FIG. 1;

FIG. 4 is a sectional view showing a state where the boss of FIG. 1 is positioned and welded to a hole.

FIG. 5 is a front view of a welding portion of FIG. 4;

FIG. 6 is an exploded perspective view showing a case where a plurality of sets of bosses and holes are provided.

FIG. 7 is a front view showing the operation of the guide groove.

FIG. 8 is a sectional view showing a thermoplastic resin component mounting structure according to a second embodiment of the present invention.

FIG. 9 is a perspective view showing the boss shape of FIG. 8;

FIG. 10 is a front view showing the hole shape of FIG. 8;

FIG. 11 is a front view showing a modification.

FIG. 12 is a cross-sectional view showing a conventional mounting structure example of a thermoplastic resin part.

FIG. 13 is an exploded perspective view showing a mounting direction when mounting is performed at a plurality of locations.

FIG. 14 is an enlarged view showing a case where the position is shifted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Thermoplastic resin part 12 Boss 13, 14, 15 rib 16 Welding part 21 The other part 22 Mounting piece 23 Hole 24 Guide groove 25 Rib 26 Guide groove 31 Thermoplastic resin part 32 Rib-shaped boss 33 Rib 41 Other part 42 Mounting Piece 43 slit-shaped open hole 44 groove 45 rib 46 small hole

 ────────────────────────────────────────────────── ─── Continued on the front page F-term (reference) 3J001 AA02 BA02 DE06 3J023 AA05 BA02 BB01 CA14 EA03 FA02 GA03 3J036 AA10 4F211 AD05 AD08 AD24 AG01 AG03 AG21 AG27 AG28 AH81 TA06 TC02 TD11 TD14 TD16 TH18 TH20 TJ74 TN75 TN22 TN22

Claims (4)

[Claims] 1. A boss provided on one thermoplastic resin part,
By inserting into the hole of the other part and welding the tip of the boss, in the mounting structure that is connected to each other, a guide groove of an expanded shape that is continuously opened from the hole to the end is formed in the other part. The guide groove is brought into contact with the boss from the side, and the boss is fitted into the hole. 2. A boss provided on one thermoplastic resin part,
By inserting into the hole of the other part and welding the tip of the boss, a rib-like boss is formed on one thermoplastic resin part and opened to the other part at the end in the mounting structure that is connected to each other. A mounting structure for a thermoplastic resin part, characterized in that a slit-shaped open hole is formed, and a rib-shaped boss is inserted into the slit-shaped open hole from an end. 3. The mounting structure for a thermoplastic resin component according to claim 2, wherein a plurality of grooves continuous with the slit-shaped open hole are formed in the other component. 4. The thermoplastic resin component mounting structure according to claim 2, wherein the other component has a plurality of small holes spaced around the slit-shaped open hole.