JP2001018658A - Weather strip for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve sliding property with a mounting part and to suppress turning over of a lip in mounting by forming a surface in contact with the part to be mounted of the lip into a surface with a small coefficient of friction, in a weather strip provided with a mounting part fitted into an insertion groove and the lip for hiding an end of the part to be mounted. SOLUTION: A weather strip for automobile such as a weather strip provided on a belt line of a door 1 is mounted on a door trim and a door panel. The weather strip is constituted of a mounting part 3 which is projectingly provided with projecting pieces 9 and a fin part 11 in elastic contact with door glass 7 and has a lip 6 for hiding a trim end. The mounting part 3 is mounted on a door trim 4 by being inserted into an insertion groove 5 of the door trim 4. In this case, a layer 8 made of tetrafluoroethylene resin is formed on a surface in contact with the door trim 4 by adhering. Or the layer 8 is molded by two-layered extrusion. As a result, turning over of a lip 6 when the weather strip is mounted is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather strip for automobiles, and more particularly to a weather strip for automobiles used as a sealing material around openings such as doors and trunks and around glass for the purpose of blocking outside air and rainwater.

[0002]

2. Description of the Related Art An automotive weather strip of this kind is:
For example, taking as an example a weather strip provided on a belt line of a door 1 as shown in FIG. The fin portion is in sliding contact with the glass, and the mounting portion is provided with a cored bar so as to have rigidity so that the mounting portion of the door trim or the door panel can be sandwiched and mounted.
As shown in FIG. 2, there is also known a type without a core bar, in which the mounting portion 3 is inserted into the insertion groove 5 of the door trim 4 and has the lip 2 for hiding the trim end. In the figure, 7 is a door glass, 9 is a projection made of a soft resin, and 11 is a door glass 7.
This is the fin part that is in contact with the fin.

[0003]

As shown in FIG. 2, a weather strip of a type without a core is mounted by inserting a mounting portion into a insertion groove, and a lip is mounted on a door trim or a door panel or the like. It does not have the function of sandwiching and fixing the part together with the mounting part, and is small and thin due to the absence of a core, and has flexibility. Therefore, when the mounting portion is inserted and mounted, there tends to occur a problem that the tip of the lip 2 is turned up as shown in FIG. 3, and when turned up, it takes much time and labor to repair this and the workability is increased. become worse.

According to the present invention, in a weather strip of a type having no cored bar and provided with a mounting portion to be inserted into the insertion groove and a lip for concealing an end of the mounting portion, the lip is less likely to be turned up at the time of mounting. It is an object of the present invention to provide a weatherstrip for an automobile.

[0005]

According to a first aspect of the present invention, there is provided an automobile having an attachment portion which is inserted into an insertion groove of an attachment portion having an insertion groove, and a lip for hiding an end of the attachment portion. In the above weather strip, the lip is characterized in that at least the surface in contact with the mounted portion has a small friction coefficient to improve the slidability with the mounted portion.

[0006] The weather strip of the present invention can be used as a sealing material around openings and glass around doors and trunks. In a preferred invention, a belt line attached to a door glass elevating opening of a door is preferably used. It is used as a weather strip and is attached to a door trim as an attached part. That is, the mounting portion is inserted into the insertion groove of the door trim having the insertion groove, and elastically contacts the door glass,
A fin is provided for sliding contact with the door glass when the door glass is moved up and down. The invention described in claim 2 corresponds to such a preferable invention, and in the invention described in claim 1, the attached portion provided with the insertion groove is a door trim.

[0007] The weather strip of each of the above-mentioned inventions is made of EPM, EP, as well as a normal weather strip.
Ethylene / propylene rubber such as DM is used, and other various known materials used in this type of weather strip can be used. For example, in the weather strip provided on the belt line of the door described above, for example, polyethylene, polypropylene,
Polyamide, polycarbonate, polyester, polyacetal, hard resin such as hard polyvinyl chloride or a material obtained by adding an additive such as glass fiber to the hard resin can be used.For the fin portion, for example, polyurethane, soft polyvinyl chloride, Thermoplastic elastomer TPE, olefin-based thermoplastic resin TPO, or the like can be used.

The lip may be entirely made of a material having a small coefficient of friction, or only the surface in contact with the portion to be mounted may be made of a material having a small coefficient of friction. Examples of such a material include a styrene block copolymer-based thermoplastic elastomer (SBC-based TPE) and an ethylene tetrafluoride resin PTF.
E, polysiloxane, carbon fiber, graphite, or a thermoplastic elastomer TPE or an olefin-based thermoplastic resin TP to which one or more of these are added
O. As a method of manufacturing the automotive weather strip of the invention, for example, a method of applying a silicone-based or urethane-based surface treatment agent having a low friction coefficient to a surface that comes into contact with a mounting portion of the lip, A method of laminating a film or sheet made of a material having a small coefficient of friction on a surface in contact with the attached portion by, for example, extruding lamination, lamination molding, or the like,
A method in which the layer in contact with the lip attachment portion is made of a material having a small coefficient of friction, and is extruded from a die so as to have a two-layer structure, or a method in which the entire lip is made of a material having a small coefficient of friction by extrusion. And the like.

Among them, the method of applying a surface treating agent or laminating a film or sheet is carried out on an existing weatherstrip or on a molded product obtained without changing the existing production method. Can be implemented.
In the case of the latter method by extrusion molding, a post-process after the latter molding is not required.

[0010]

FIG. 4 shows the same weatherstrip except for the lip of an inner weatherstrip provided on the belt line of the door shown in FIG. 2, and shows the surface of the lip 6 which contacts the door trim 4. Figure 5
A lip 6 and a protruding piece 9 shown in FIG. 4 and a door glass 7 shown in FIG. 2 are formed by sticking a layer 8 made of tetrafluoroethylene resin PTFE as shown in FIG. The fin portion 11 which is elastically contacted with is formed of thermoplastic olefin TPO, and the mounting portion 3 is formed of polypropylene.

[0011]

According to the weather strip for automobiles of the present invention, the lip is less likely to be turned up when it is attached to the portion to be attached, and the work for repairing the turn-up can be dispensed with, so that the workability is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an indoor side of an automobile door.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged sectional view showing a state in which the lip is turned up.

FIG. 4 is a sectional view of a weather strip.

FIG. 5 is an enlarged sectional view of the lip shown in FIG. 4;

[Explanation of symbols]

 3. Attachment part 4. Door trim 5. Insert groove 6. Lip 7. Door glass 8. Layer made of tetrafluoroethylene resin 9. Protrusion 11. Fin part

Continuing on the front page (72) Inventor Hitoshi Hamanaka 2-2-2, Mishino-cho, Nishi-ku, Hiroshima-shi Nishikawa Rubber Industries Co., Ltd. (72) Inventor Kenji Mochizuki 300-Takatsukacho, Hamamatsu-shi, Shizuoka Suzuki Co., Ltd.

Claims (2)

[Claims] 1. A weather strip for an automobile, comprising: a mounting portion 3 inserted into the insertion groove 5 of the mounting portion 4 having the insertion groove 5; and a lip 6 for hiding an end of the mounting portion 4. A weather strip for an automobile, characterized in that at least a surface of the lip (6) in contact with the mounted portion (4) is a surface (8) having a small coefficient of friction to improve slidability with the mounted portion (4). 2. A weather strip for an automobile according to claim 1, wherein said mounting portion provided with said insertion groove is a door trim.