JP4035427B2 - Plastic molded product - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a resin molded article formed by joining two molded bodies made of resin by vibration welding.
[0002]
[Prior art]
Conventionally, as this type of resin molded product, for example, an instrument panel for a vehicle is known (see, for example, Patent Document 1). In the instrument panel of Patent Document 1, the outer edge portion of the instrument panel main body and the outer edge portion of the air-conditioning air duct disposed on the back side of the instrument panel main body are joined by vibration welding, whereby both members are joined. It is made to integrate firmly, without using the components for fastening.
[0003]
[Patent Document 1]
Japanese Patent No. 3050056 (page 3, FIGS. 1 to 4)
[0004]
[Problems to be solved by the invention]
By the way, when two molded bodies made of resin are vibration welded, thin thread-like burrs, so-called hair burrs, are generated between both molded bodies. In Patent Document 1, since the bristle rib is provided in parallel with the outer edge portion of the molded body in Patent Document 1, the hair burr is continuously generated along the outer edge portion of the molded body. May protrude outward from the joint portion, and the appearance of the resin molded product may deteriorate.
[0005]
The present invention has been made in view of such a point, and the object of the present invention is to devise a method for providing the rib ribs for welding, while ensuring the bonding strength between the two molded products, It is inconspicuous and makes the appearance of the resin molded product good.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, the ribs are arranged to be inclined with respect to the outer edge of the molded body.
[0007]
Specifically, the invention of claim 1 is directed to a resin molded product formed by joining the opposing surfaces in the vicinity of the outer edge portion of the resin-made first molded body and second molded body to each other by vibration welding.
[0008]
Then, a plurality of welding rib ribs bonded to the other facing surface are provided on one of the facing surfaces so as to protrude along the outer edge portion, and the adjacent rib ribs are connected to the outer edge portion. It is set as the structure arranged so that it may incline in reverse.
[0009]
According to this configuration, since the plurality of projecting ribs are inclined with respect to the outer edge portion, the total length of the projecting ribs is longer than when the projecting rib is simply provided in parallel with the outer edge portion of the molded body. As a result, a sufficient welding area is obtained, and the first and second molded bodies are more firmly joined. Further, since only a part of the protruding rib is located in the vicinity of the outer edge portion of the molded body, the hair burr does not continuously occur on the outer edge portion of the resin molded product, and thus protrudes outward from the resin molded product. The hair burr is greatly reduced and is not noticeable, and the appearance of the resin molded product is improved.
[0010]
In addition, when a sealing material is applied to the outer edge of a resin molded product, since there are few hair burrs protruding outward, the sealing material can be easily and firmly attached, and sufficient sealing performance is ensured. .
[0011]
According to a second aspect of the present invention, in the first aspect of the invention, the adjacent ribs are configured such that the end portions on the side approaching each other are connected to each other so as to be substantially wave-shaped.
[0012]
According to this structure, a welding area becomes still wider and the 1st and 2nd molded object is joined still more firmly.
[0013]
According to a third aspect of the present invention, in the first or second aspect of the present invention, the first molded body is an instrument panel body disposed in a vehicle interior, and the second molded body is a back side of the instrument panel body. It is set as the structure which is an air duct for an air conditioning arrange | positioned in.
[0014]
According to this structure, since the hair burr hardly protrudes from the outer edge portion of the instrument panel, the appearance of the vehicle interior is improved.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
FIG. 2 shows an example in which a resin molded product according to an embodiment of the present invention is applied to an instrument panel P of a vehicle. The instrument panel P is disposed at the front end of the passenger compartment. The instrument panel body 1 is a resin first molded body, and the second resin panel is disposed on the back side of the instrument panel body 1. The air-conditioning air duct 3 which is a molded body is joined to each other by vibration welding. Although not shown, an air conditioner for generating conditioned air is disposed below the conditioned air duct 3 on the back side of the instrument panel body 1.
[0017]
As shown in FIG. 3, the instrument panel main body 1 includes a horizontal wall 1a extending substantially horizontally from the vicinity of the cowl panel 7 disposed at the lower end of the front window 5 to the rear side of the vehicle body. A defroster air outlet 9 through which air-conditioned air blows out on the inner surface of the front window 5 is formed on the front side of the vehicle body 1a. An extension portion that extends upward from the vicinity of the front edge of the vehicle body of the defroster air outlet 9 to the front side of the defroster air outlet 9 of the horizontal wall portion 1a, and then extends to the vicinity of the cowl panel 7 at a substantially right angle to the front side of the vehicle body. 1b is formed. A sponge-like sealing material 13 is attached to the front end of the vehicle body on the upper surface of the extending portion 1b so as to contact the inner surface of the front window 5.
[0018]
Further, as shown in FIG. 2, a vertical wall portion 1c is connected to the rear end of the horizontal wall portion 1a of the instrument panel main body 1, and in the vicinity of the boundary between the horizontal wall portion 1a and the vertical wall portion 1c. Side vent air outlets 15 and 15 located on both sides in the vehicle width direction are formed, and demisters 19 and 19 are formed above the side vent air outlets 15 and 15, respectively. 17 is formed.
[0019]
The air-conditioning air duct 3 is connected to the air-conditioning air outlet of the air-conditioning apparatus and guides the air-conditioning air from the air-conditioning air outlet to the defroster outlet 9 and the demisters 19 and 19 of the instrument panel main body 1. The upper panel 31 and the lower panel 33 are configured. A connection port 33a is formed on the rear side of the vehicle body of the lower panel 33 so as to extend substantially horizontally and to be connected to the air-conditioning air lead-out portion. A peripheral wall 33b extending downward is integrally formed on the periphery of the connection port 33a. Yes. A flange 33c that extends substantially horizontally is connected to the rear side of the vehicle body at the periphery of the connection port 33a, and a rectangular engagement port 33d that engages with an engagement claw 31b (described later) of the upper panel 31 is formed on the flange 33c. Has been.
[0020]
Further, the front side of the lower panel 33 with respect to the connection port 33a is a curved portion 33e that is curved upward, and the curved portion 33e is substantially the same as the front edge of the vehicle body of the defroster outlet 9 on the back of the instrument panel body 1. It extends until it matches. Further, an extension portion 33f extending substantially along the back surface of the extension portion 1b of the instrument panel main body 1 is formed on the vehicle body front side of the curved portion 33e of the lower panel 33. The front end of the vehicle body of the extension portion 33f is located substantially on the same plane as the front end of the vehicle body of the extension portion 1b of the instrument panel body 1, and an integral sponge is attached to the front end of the vehicle body of the extension portions 1b and 33f. A sealing material 35 is attached so as to come into contact with the surface of the cowl panel 7 on the passenger compartment side.
[0021]
Further, the upper surface in the vicinity of the front edge that is the outer edge of the extending portion 33f of the lower panel 33 and the rear surface in the vicinity of the front edge of the extending portion 1b of the instrument panel main body 1 are opposed surfaces 33g, As shown in FIG. 1, a plurality of first ribs 39a and second protrusions for welding along the front edge of the lower surface 33g of the lower panel 33 as a feature of the present invention. A projecting rib 39 comprising a projecting rib 39b is projected, and the first and second projecting ribs 39a and 39b are projected alternately. Each first rib rib 39a is formed in a straight line located on the left side in the vehicle width direction from the vehicle body front edge of the opposed surface 33g to the vehicle body rear side, while each second rib rib 39b is formed on the opposed surface. It is formed in a straight line located on the right side in the vehicle width direction from the 33g vehicle body front edge to the vehicle body rear side. Thus, the first and second projecting ribs 39a and 39b adjacent to each other are intermittently arranged so as to incline in the opposite direction with respect to the vehicle body front edge portion of the lower panel 33. Are aligned in the vehicle width direction.
[0022]
A flange 31a joined to the upper surface of the flange 33c of the lower panel 33 is formed at the rear end of the upper panel 31 of the air conditioning air duct 3, and the lower surface of the flange 31a is engaged with the engagement port 33d of the lower panel 33. A claw 31b is projected. Further, the front side of the upper panel 31 with respect to the flange 31a of the upper panel 31 rises substantially vertically until it approaches the back surface of the instrument panel body 1, and then extends forward of the vehicle body, with its tip abutting the vehicle body rear edge of the defroster outlet 9. A bending portion 31c is formed to be in contact with each other. Reference numeral 37 denotes a rib protruding from the inner surface of the duct of the upper panel 31, and the tip of the rib 37 is in contact with the inner surface of the duct of the lower panel 33.
[0023]
The air-conditioning air duct 3 is assembled by engaging the engaging claws 31b of the upper panel 31 with the engaging openings 33d of the lower panel 33. In this assembled state, the curved portion 31c of the upper panel 31 and the curved portion 33e of the lower panel 33 are provided. An air outlet 3 a corresponding to the defroster outlet 9 is formed by the upper end. In addition, the welding 3rd rib rib 41 extended in the vehicle width direction is protrudingly provided by the flow outlet 3a vicinity of the extension part 33f upper surface of the said lower panel 33. As shown in FIG.
[0024]
In the instrument panel P configured as described above, when the instrument panel main body 1 and the air conditioning air duct 3 are vibration welded, the instrument panel main body 1 is fixed, and the first to first of the air conditioning air duct 3 is fixed. The tips of the three rib ribs 39a, 39b, 41 are pressed against the opposing surface 1d of the instrument panel body 1 and the periphery of the defroster outlet 9 to vibrate the air-conditioning air duct 3 in the vehicle width direction, or On the contrary, the air-conditioning air duct 3 is fixed, and the instrument panel body 1 is vibrated in the vehicle width direction.
[0025]
When the air-conditioning air duct 3 is vibration welded to the back side of the instrument panel body 1, as shown in FIG. 4, bristles 40 are generated along the longitudinal direction of the first and second protruding ribs 39a, 39b. In this embodiment, since the first and second rib ribs 39a and 39b are inclined, only the vehicle body front ends of the rib ribs 39a and 39b are positioned at the vehicle body front edge of the lower panel 33. The hair burr 40 does not continuously occur in the vicinity of the front edge of the vehicle body of the instrument panel body 1, and therefore the hair burr 40 that protrudes outward from the instrument panel P is greatly reduced and is not noticeable. The appearance of the front edge of the car body can be improved.
[0026]
Further, since the vibration direction is the vehicle width direction of the air-conditioning air duct 3 during the vibration welding, most of the generated burr 40 is formed along the vibration direction by the first and second protruding ribs 39a and 39b. It extends from both sides to the vehicle width direction. Thereby, the hair burr | flash which extends toward the vehicle body front edge of the instrument panel P decreases, and it can make it look better.
[0027]
Further, when the sealing material 35 is attached to the front end of the vehicle body of the extending portion 1b of the instrument panel body 1 and the extending portion 33f of the lower panel 33, the burr 40 generated at the front edge of the vehicle body of the lower panel 33 as described above. Therefore, the sealing material 35 can be easily and firmly attached, and sufficient sealing performance can be secured.
[0028]
Further, since the first and second projecting ribs 39a and 39b are inclined and extend with respect to the vehicle body front edge portion of the lower panel 33, the first and second protrusion ribs 39a and 39b are provided so as to extend parallel to the vehicle body front edge portion of the lower panel 33. In comparison with the above, the total length of the ribs is increased, so that the welding area between the instrument panel main body 1 and the air-conditioning air duct 3 can be sufficiently secured, so that both can be firmly joined.
[0029]
In this embodiment, the rib ribs 39 project intermittently without the adjacent first rib ribs 39a and second rib ribs 39b being continuous, but the present invention is not limited to this. As in the modification shown in FIG. 4, the end portions of the adjacent first protrusion ribs 39a and the second protrusion ribs 39b that are adjacent to each other are connected by the connecting portions 39c of the protrusions, so that the V-shaped direction is In other words, the protrusion ribs 39a and 39b may be continuously arranged in a substantially waveform. According to this modification, the bonding area between the facing surface 1d of the instrument panel main body 1 is further increased, and the instrument panel main body 1 and the air conditioning air duct 3 can be firmly bonded to that extent. In this case, although not shown, the connecting portion 39c may be partially provided.
[0030]
In this embodiment, the rib ribs 39 are formed on the air-conditioning air duct 3. However, the present invention is not limited to this, and similar rib ribs may be formed on the facing surface 1d of the instrument panel main body 1. Good.
[0031]
In this embodiment, the air-conditioning air duct 3 is composed of the separate upper panel 31 and lower panel 33, but may be integrally molded by a blow molding method or the like.
[0032]
Furthermore, the present invention is applicable not only to vehicle interior materials, but also to resin molded products obtained by vibration welding of two resin molded bodies.
[0033]
【The invention's effect】
As described above, according to the resin molded body according to the invention of claim 1, a plurality of weldings are performed along the outer edge of the molded body on one of the opposing surfaces in the vicinity of the outer edge of the first and second molded bodies. Since protruding ribs are provided and the ribs adjacent to each other are arranged to be inclined in the opposite direction with respect to the outer edge, it is possible to obtain a sufficient welding area and firmly bond both molded bodies, and The burr that protrudes toward the direction is not noticeable, and the appearance can be improved.
[0034]
According to the second aspect of the present invention, since the adjacent ribs are made to be substantially corrugated, the welding area is further increased, and both molded bodies can be joined more firmly.
[0035]
According to invention of Claim 3, a 1st molded object is an instrument panel main body arrange | positioned in the vehicle interior, and a 2nd molded object is for the air conditioning arrange | positioned at the back side of the said instrument panel main body. Since it is an air duct, the interior appearance of the vehicle is improved.
[Brief description of the drawings]
FIG. 1 is a plan view showing a vehicle body front side of a lower panel of an air conditioning air duct.
FIG. 2 is a perspective view of a vehicle instrument panel according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view taken along line AA in FIG.
FIG. 4 is an enlarged plan view showing a state after the first and second protruding ribs are welded.
FIG. 5 is a view corresponding to FIG. 1 according to a modification.
[Explanation of symbols]
1 Instrument panel body (first molded body)
1d Opposing surface 3 Air duct for air conditioning (second molded body)
33g Opposing surface 39 ridge rib 39a first ridge rib 39b second ridge rib P instrument panel (resin molded product)

Claims (3)

A resin molded product obtained by joining the opposing surfaces in the vicinity of the outer edge of the first molded body made of resin and the second molded body to each other by vibration welding,
One of the opposing surfaces is provided with a plurality of welding rib ribs joined to the other opposing surface along the outer edge,
The protruding ribs adjacent to each other are arranged so as to be inclined in the opposite direction with respect to the outer edge portion. In claim 1,
Adjacent ridge ribs are connected to the end portions on the side approaching each other, and are continuous in a substantially wavy shape. In claim 1 or 2,
The first molded body is an instrument panel main body disposed in a vehicle interior, and the second molded body is an air conditioning air duct disposed on the back side of the instrument panel main body. Molding.

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