KR20150059295A - A assembly structure for hot stacking of parts of a car - Google Patents

Abstract

The present invention relates to an assembly structure for vehicle components using thermal bonding, comprising: a boss part having groups of multiple bosses at predetermined intervals to be arranged on one side of one component among two components to be assembled together; and a flange which is arranged on one side of the other component and has multiple boss holes to allow the bosses to be inserted and pass through. Therefore, the assembly structure provides multiple thermal bonding support points, thereby preventing the deformation of products, improving the durability of products, and preventing noise caused by the deformation of products.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hot-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heat fusion assembly structure of an automotive part, and more particularly, to a heat fusion assembly structure of an automotive part for assembling a resin-based component which is heat-sealable among automobile parts.

In general, when assembling automobile interior parts made of thermoplastic plastic material, a method of assembling by heat fusion is widely used.

For example, as shown in FIG. 1, the main trim 110 of the door made of a plastic material (resin system) and the grill 120 are assembled by heat welding. A flange 112 having a mounting hole 122a is formed in the main trim 110 of the door and a heat welding boss 122 is formed in the grill 120. [

When the heat-welding boss 122 is heated while being fitted in the mounting hole 122a of the flange 112, the heat-welding boss 122 is thermally welded to the flange 112, The grill 120 is engaged.

2, the flanges 112 are provided at predetermined intervals (for example, about 100 mm) along the edge of the door main trim 110, and one flange 112 is provided with one heat welding boss 122 . Fig. 3 shows a state of normal heat fusion assembly.

As shown in FIG. 4, in the heat-sealing process, fine deflection due to shrinkage occurs during the process of being deformed due to poor heat-sealing condition or hardening after heat-sealing, thereby causing clearance between the components, Which in turn leads to rattle noise.

Particularly, there is a problem that a small deformation in a three-dimensional product is more likely to be expanded than in a planar shape, and a defect in the product can not be confirmed if it occurs in a position difficult to visually recognize.

In addition, when a defect occurs in one of the heat-welding bosses 122 in the process of heat-sealing, a gap between the adjacent flanges 112 and the heat-welding boss 122 may be large.

For example, in the past, the distance between heat fusion points was arranged at intervals of 100 mm to 50 mm, and the adjacent points did not have an effect of constraining microdeformation.

The present invention has been made in order to overcome the problems of the conventional heat-seal assembly structure of automobile parts as described above. It is possible to improve the durability by preventing the product from being deformed by making a plurality of heat- And an object of the present invention is to provide a heat fusion assembly structure of an automobile part which can prevent the above-

In order to accomplish the above object, the present invention provides a heat-fusion assembly structure for automotive parts, comprising: a heat-fusion assembly structure for assembling resin-based components of an automobile by heat fusion, And a plurality of bosses provided at one side of the other of the two parts to be assembled to each other, the bosses being inserted into the bosses through the bosses And a flange.

In the heat fusion assembly structure of an automotive part according to an embodiment of the present invention, the boss portion may be provided in a triangular shape with three bosses spaced apart from each other.

In the heat fusion assembly structure of an automotive part according to an embodiment of the present invention, the boss portion may include two bosses sharing one boss to form two triangles.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

As described above, according to the heat fusion assembly structure of the automobile part according to the present invention, a plurality of heat fusion points can be dispersed and arranged to prevent deformation, and even if some heat fusion failure occurs, Can be improved.

1 is a perspective view showing a heat fusion assembly structure of an automotive part according to a conventional technique,
2 is a plan view showing a heat fusion assembly structure of an automotive part according to the prior art,
3 is a schematic cross-sectional view cut along the line AA of FIG. 2,
Fig. 4 is a side cross-sectional view showing a state of heat fusion and deformation of the heat fusion assembly structure of the automobile part shown in Fig. 3,
5 is a perspective view illustrating a heat fusion assembly structure of an automobile part according to an embodiment of the present invention.
Fig. 6 is a plan view showing a state of heat fusion bonding of the automobile parts shown in Fig. 5,
FIG. 7 is a schematic side cross-sectional view cut along the line BB of FIG. 6,
8 is a schematic plan view showing a heat fusion assembly structure of an automotive part according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

5 to 8, a heat fusion assembly structure of an automotive part according to an embodiment of the present invention includes a boss unit 30 having a plurality of bosses 31 formed at a predetermined interval from each other, And a flange 40 having a plurality of boss holes 41 through which the bosses 31 are inserted.

The parts to be assembled by heat fusion are resin-based interior materials made of thermoplastic plastic material. The boss portion 30 is provided on one side of one of the two components (hereinafter, referred to as 'first assembly') to be assembled to each other by thermal fusion, and the other portion And a flange 40 is provided on one side.

The first assembly 10 and the second assembly 20 are assembled together by heat fusion at a plurality of heat fusion points. One flange 40 and one boss 30 are provided at positions where the first assembly 10 and the second assembly 20 are to be thermally fused.

A plurality of bosses 30 are provided at a predetermined interval on one side of the first assembly 10, and each boss 30 is composed of a plurality of bosses 31.

The flange 40 is formed at an edge of the second assembly 20 so as to protrude outwardly and is formed at a position corresponding to the boss 30.

The flange 40 has a boss hole 41 through which the bosses 31 of the boss 30 are inserted and which are located at positions corresponding to the bosses 31.

The plurality of bosses 31 of the boss portion 30 are thermally fused while being inserted through the boss hole 41 of the flange 40. [

The bosses 30 are formed by grouping a plurality of bosses 31 at predetermined intervals. As shown in FIG. 7, when a plurality of bosses 31 are disposed at one point to be thermally fused, a plurality of support points for bending the flange 40 on the same plane as shown in FIG. 7 are formed, . Further, the bosses 31 restrain adjacent bosses 31 from each other to suppress micro-deformation.

8, when three bosses 31 are provided at a predetermined interval in a triangular configuration, the three bosses 31 form a stable triangular configuration at the positions of the heat-welded points, 40).

That is, if the three bosses 31 form a triangle at one point to be thermally fused, the flange 40 is stably supported at three adjacent points, so that warping deformation in all directions can be minimized .

Therefore, it is possible to prevent a gap from being generated between the flange 40 and the first assembly 10 due to deformation, and to prevent rattle noise due to micro-deformation.

6 and 7 show another embodiment in which the boss portion forms a triangular configuration. The bosses 30 shown in FIGS. 6 and 7 share two bosses 31 and 32 with one boss 32 to form two triangles.

When three triangles constituted by three bosses 31 are continuously arranged, since one boss 31 is overlapped, two triangles are realized by five bosses 31 and 32 by sharing one boss 32 .

When the bosses 31 are disposed adjacent to each other in a double triangular shape, the heat-fusible support points support each other more stably than in the case of a single triangle, thereby preventing deformation. Particularly, by sharing one boss 32, it is possible to realize a structure in which five bosses 31 and 32 are stably supported at the same intervals, and thereby, by using six bosses 31, Two triangles can be successively arranged adjacent to each other in comparison with the case of implementing two triangles. Thus, two triangles can be realized while minimizing the size of the flange 40.

If the grouped bosses 30 as described above are structurally weak or concentrically disposed at a portion where the deformation of the shape is severe, the durability of the product can be improved more effectively.

In addition, even if defects are generated or damaged at some welding points among the plurality of bosses 31 of the grouped bosses 30, the welding points of the adjacent other bosses 31 hold the flange 40 to assemble the assembly And it is possible to prevent a single heat fusion failure from leading to product defects.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious that the modification or the modification is possible by the person.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: first assembly 20: second assembly
30: boss portion 31, 32: boss
40: flange 41: boss hole

Claims (3)

In a thermally welded assembly structure for assembling resin-based parts of an automobile by heat welding,
A boss part having a plurality of bosses formed at one side of one of the two parts assembled to each other at a predetermined interval; And
And a flange provided at one side of the other of the two parts to be assembled to each other and having a plurality of boss holes through which the bosses are respectively inserted. The boss unit according to claim 1,
Wherein three bosses are provided in a triangular configuration at a predetermined interval from each other. The boss unit according to claim 2,
Wherein five bosses are provided in two triangles by sharing one boss.

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