JP4144729B2 - Door molding - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention comprises a base portion attached along the lower edge of the door, and a lip portion extending downward from the base portion, and when the door is closed, the lip portion becomes a rocker portion at the lower edge of the door opening of the body. It relates to the molding under the door.
[0002]
[Prior art]
In addition to a weather strip that seals between the inner panel peripheral edge and the body door opening peripheral edge, the vehicle door includes a door as shown in FIG. 5 in order to improve the appearance, prevent dust from entering, and improve sound insulation. A door lower molding 5 may be provided along the lower edge of one outer panel 3.
[0003]
The lower edge of the door 1 is composed of an outer panel 3 and an inner panel 4 as shown in FIG. 6 showing a cross section taken along a cutting line AA in FIG. 5, and the lower part of the outer panel 3 is bent toward the inner panel 4 side. An inclined portion 3a and a hemming portion 3b that is bent and joined to the inner panel 4 are formed. Clip holes 3c are formed in the inclined portion 3a at a predetermined interval.
[0004]
The molding under the door 5 is made by extrusion molding a resin having elasticity (for example, polyvinyl chloride) so as to surround a core material 7 having a substantially C-shaped cross section formed by roll-molding a thin plate of long stainless steel or the like. Etc. are molded.
[0005]
The lower door molding 5 includes a core member 7, a groove 9 a is formed, a base portion 9 provided along the inclined portion 3 a of the outer panel 7, and extends downward from the base portion 9. 11 and a lip portion 13 capable of abutting on the lip 11.
[0006]
The door lower molding 5 is attached to the door 1 using a clip 15 that engages with the groove 9 a and engages with the clip hole 3 c of the outer panel 3 of the door 1.
[0007]
[Problems to be solved by the invention]
However, in the door lower molding 5 configured as described above, when the door 1 is strongly closed, the vibrations of the outer panel 3 and the inner panel 4 of the door 1 are transmitted to the door lower molding 5 and are in contact with the rocker portion 11. There is a problem that chatter noise is generated at the tip of the door 1 and the closing sound of the door 1 is deteriorated.
[0008]
This invention is made | formed in view of the said problem, The subject is providing the door lower molding which can reduce generation | occurrence | production of the chatter sound at the time of door strong closing.
[0009]
[Means for Solving the Problems]
The invention according to claim 1, which solves the above problem, comprises a base portion formed by an extrusion molding method and attached along the lower edge of the door, and a lip portion extending downward from the base portion, and the door is closed. Further, in the door lower molding in which the lip portion contacts the rocker portion at the lower edge of the door opening of the body, the lip portion is a first layer made of a soft resin outside the vehicle and a second layer made of a soft resin inside. constituted by a layer, different from the hardness of said second layer and said first layer, said second layer and wherein the benzalkonium provided spot to the front Symbol first layer It is a molding under the door.
[0010]
By configuring the lip portion with the first layer and the second layer having different hardness, that is, by combining the different properties of how the vibration is transmitted, vibration is attenuated and chatter noise can be reduced. .
[0011]
According to a second aspect of the present invention, one of the first layer and the second layer has a Shore hardness A scale of 70 or more and 80 or less, and the other layer has a Shore hardness A scale. The door lower molding according to claim 1, wherein the molding is 55 or less.
[0012]
Among the first layer and the second layer, the hardness of one layer is 70 or more and 80 or less on the Shore hardness A scale, and the hardness of the other layer is 55 or less on the Shore hardness A scale. , Ensuring that the lip is not caught and chatter noise is reduced.
[0013]
The “lip portion entrainment” refers to a phenomenon in which when the door is closed, the lip portion of the lower molding of the door is elastically deformed by impact and does not come into contact with a predetermined position of the rocker portion.
[0014]
If the hardness of one layer is 70 or less on the Shore hardness A scale, the rigidity of the entire lip portion is lowered, and the lip portion is caught when the door is closed. When the hardness of one of the layers is 80 or more on the Shore hardness A scale, the rigidity of the entire lip portion is increased, and the hitting sound when the lip portion comes into contact with the rocker portion of the body increases when the door is closed. .
[0015]
On the other hand, if the hardness of the other layer is 55 or more on the Shore hardness A scale, the lip portion does not adhere to the door and the soundproofing property is deteriorated.
The invention according to claim 3 is the door lower molding according to claim 1 or 2, wherein the hardness of the first layer is higher than the hardness of the second layer.
[0016]
By making the hardness of the first layer, which is the outside of the vehicle to be the painted surface, higher than the hardness of the second layer, which is the inside of the vehicle, that is, by making the painted surface hard, the paintability is improved.
[0017]
According to a fourth aspect of the present invention, in the molding under the door according to any one of the first to third aspects, the soft resin is any one of polyvinyl chloride, EVA resin, and olefinic thermoplastic elastomer. is there.
[0018]
By using any one of polyvinyl chloride, EVA (Ethylene Vinylate Copolymer) resin, and olefin-based thermoplastic elastomer (TPO) as the soft resin, weather resistance can be improved.
[0019]
Furthermore, since these are thermoplastic resins with good bonding properties, simultaneous molding becomes possible, and cost increases can be suppressed.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments will be described below with reference to the drawings. The difference between the following embodiment and the above-described conventional example is the structure of the molding under the door, and the other parts are the same, so in FIGS. 1 to 4 for explaining the embodiment, the same as the conventional example. Parts are denoted by the same reference numerals, and redundant description is omitted.
[0021]
A description will be given with reference to FIG. In the figure,
The door lower molding 105 is formed by extrusion molding of two types of thermoplastic thermoplastic resins so as to surround a core material 7 having a substantially C-shaped cross-section formed by roll-forming a thin plate of stainless steel or the like. It has been done.
[0022]
The lower door molding 105 includes a core member 107, a groove 109a is formed, a base portion 109 provided along the inclined portion 3a of the outer panel 7, and extends downward from the base portion 109. 11 and a lip portion 113 capable of abutting on the lip 11.
[0023]
The door lower molding 105 is attached to the door 1 using a clip 15 that engages with the groove 9 a and engages with the clip hole 3 c of the outer panel 3 of the door 1.
[0024]
In the lip portion 113, the two types of thermoplastic thermoplastic resins are a first layer 115 made of a thermoplastic soft resin outside the vehicle and a second layer 117 made of an inner thermoplastic soft resin.
[0025]
In the present embodiment, the first layer 115 is made of polyvinyl chloride with a Shore hardness A scale of 75, and the second layer 117 is made of polyvinyl chloride with a Shore hardness A scale of 50.
[0026]
According to the above configuration, the following effects can be obtained.
(1) By constituting the lip portion 113 with the first layer 115 and the second layer 117 having different hardnesses, that is, by combining materials having different ways of transmitting vibration, vibration is attenuated and chatter occurs. Sound generation can be reduced.
(2) The hardness of the first layer 115 that is the outside of the vehicle that is the painted surface is higher than the hardness of the second layer 117 that is the inside of the vehicle (50 on the Shore hardness A scale), that is, the painted surface. The paintability is improved by hardening the.
[0027]
Further, the hardness of the first layer 115 is 75 on the Shore hardness A scale, and the hardness of the second layer 117 is 50 on the Shore hardness A scale, so that soundproofing is ensured and the lip 113 is not caught. Generation of chatter noise can be reduced.
(3) Weather resistance can be improved by using polyvinyl chloride as the material of the first layer 115 and the second layer 117.
[0028]
Furthermore, since polyvinyl chloride is a thermoplastic resin with good binding properties, simultaneous molding is possible, and cost increases can be suppressed.
The present invention is not limited to the above embodiment. The shapes shown in FIGS. 2 to 4 may be used as the shapes of the first layer and the second layer.
[0029]
In the embodiment described above, the bonding surface between the first layer 215 and the second layer 217 in the lip portion 113 is a flat surface, but as shown in FIG. The joint surface with the second layer 217 may be corrugated. Desired vibration damping can be obtained by changing the wavefront amplitude, wave height, and the like.
[0030]
Further, as shown in FIG. 3, the second layer 317 may be spot-formed with respect to the first layer 315, and a desired vibration damping is obtained by changing the size of the second layer 317. Can do.
[0031]
Furthermore, as shown in FIG. 4, the joint surface between the first layer 415 and the second layer 417 may be a flat surface, and the surface of the second layer 417 on the vehicle body side may be corrugated. Desired vibration damping can be obtained by changing the wavefront amplitude, wave height, and the like.
[0032]
In the above-described embodiment, the material of the first layer 115 and the second layer 117 is polyvinyl chloride. However, it is an EVA resin or a olefin-based thermoplastic elastomer which is a soft resin and has thermoplasticity. May be.
[0033]
Furthermore, although the hardness of the first layer 115 is 75 on the Shore A scale and the hardness of the second layer 117 is 50 on the Shore A scale, the hardness of the first layer 115 is 70 or more, 80 Hereinafter, if the hardness of the second layer 117 is 55 or less on the Shore hardness A scale, soundproofing is ensured, the lip portion 113 is not involved, and chatter noise can be reduced.
[0034]
When the hardness of the first layer 115 is 70 or less on the Shore hardness A scale, the rigidity of the entire lip portion 113 is lowered, and the lip portion 113 is caught in the rocker portion when the door 1 is closed. When the hardness of the first layer 115 is 80 or more on the Shore hardness A scale, the rigidity of the entire lip portion 113 becomes high, and when the lip portion 113 comes into contact with the rocker portion 11 of the body when the door 1 is closed. The hit sound becomes louder.
[0035]
Further, if the hardness of the second layer 117 is 55 or more on the Shore hardness A scale, the soundproofing property is deteriorated.
[0036]
【The invention's effect】
As described above, according to the first aspect of the present invention, the lip portion is composed of the first layer and the second layer having different hardnesses, that is, those having different properties of transmitting vibration are combined. As a result, vibration is attenuated and chatter noise can be reduced.
[0037]
According to the second aspect of the present invention, one of the first layer and the second layer has a Shore hardness A scale of 70 or more and 80 or less, and the other layer has a Shore hardness A. By being 55 or less on the scale, soundproofing is ensured, the lip portion is not caught, and chatter noise can be reduced.
[0038]
When the hardness of one layer is 70 or less on the Shore hardness A scale, the rigidity of the entire lip portion is lowered, and the lip portion is caught in the rocker portion when the door is closed. When the hardness of one of the layers is 80 or more on the Shore hardness A scale, the rigidity of the entire lip portion is increased, and the hitting sound when the lip portion comes into contact with the rocker portion of the body increases when the door is closed. .
[0039]
On the other hand, if the hardness of the other layer is 55 or more on the Shore hardness A scale, the lip portion does not adhere to the door and the soundproofing property is deteriorated.
According to the invention described in claim 3, the hardness of the first layer, which is the outside of the vehicle to be the painted surface, is made higher than the hardness of the second layer, which is the inside of the vehicle, that is, the painted surface is hardened. As a result, the paintability is improved.
[0040]
According to invention of Claim 4, a weather resistance can be improved by using any one of polyvinyl chloride, EVA resin, and an olefin type thermoplastic elastomer as said soft resin.
[0041]
Furthermore, since these are thermoplastic resins with good bonding properties, simultaneous molding becomes possible, and cost increases can be suppressed.
[Brief description of the drawings]
FIG. 1 is a sectional view of a door lower molding according to an embodiment.
FIG. 2 is a cross-sectional view of a door lower molding according to another embodiment.
FIG. 3 is a sectional view of a door lower molding according to another embodiment.
FIG. 4 is a cross-sectional view of a door lower molding according to another embodiment.
FIG. 5 is a diagram for explaining door lower molding.
6 is a view showing a cross section taken along a cutting line AA in FIG. 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door 11 Locker part 105 Door lower molding 109 Base part 113 Lip part 115 1st layer 117 2nd layer

Claims (4)

A base part (109) formed by an extrusion method and attached along the lower edge of the door (1), and a lip part (113) extending downward from the base part (109), the door (1) is closed. When the lip portion (113) contacts the rocker portion (11) at the lower edge of the body door opening,
The lip portion (113) is composed of a first layer (115) made of a soft resin outside the vehicle and a second layer (117) made of a soft resin inside,
The hardness of the first layer (115) and the second layer (117) is different ,
Before SL door under molding said second layer is characterized by a Turkey provided spot relative to the first layer.   Of the first layer and the second layer, one layer has a Shore hardness A scale of 55 or less, and the other layer has a Shore hardness A scale of 70 or more and 80 or less. The door lower molding according to claim 1.   The molding under the door according to claim 1, wherein the hardness of the first layer is higher than the hardness of the second layer.   The door lower molding according to any one of claims 1 to 3, wherein the soft resin is any one of polyvinyl chloride, EVA resin, and olefinic thermoplastic elastomer.

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