JPS61218455A - Weather strip for automobile - Google Patents

Abstract

PURPOSE:To improve sealability ever so high, by making up the insert member embedded in a trim part with plastics, while forming a projecting part, extending in each holding lip, in this insert member and forming a tip part of a specified holding lip with sponge rubber. CONSTITUTION:A weather strip 1A is provided with a sectional U-shaped trim part 2, a hollow seal part 3 and a liplike auxiliary seal part 4. At the abovementioned, an insert member 6 composed of plastics of vinyl chloride resin or the like is embedded in this trim part 2. And, in this insert member 6, there is provided with each of projecting parts 61 extending from each root to an intermediate part of each of holding lips 5a-5d in the trim part 2. Among these holding lips 5a-5d, the holding lip 5a being situated at the outside of a flange 8 and at the lower stage at the time of weather strip setting is formed with sponge rubber at its tip end 51a. According to this method, the weather strip 1A is prevented from tilting down and, what is more, sealability is improvable so favorable enough.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a weather strip that is attached to the edge of an opening in an automobile body and that connects the opening/closing member that opens and closes the opening and the vehicle body.

[Prior art]

The conventional example shown in FIG. 6 shows a cross section taken along line A--A in FIG. 7 of a weather strip installed around the trunk of an automobile.

The weatherstrip IB includes a trim part 2 having a U-shaped cross section, a hollow seal part 3 protruding from the upper end of the trim part 2, and an auxiliary seal part 4 protruding from the outer surface of the trim part 2. Further, from the opposing inner surfaces of the trim part 2, the tails are held upward and downward, respectively.

The trim portion 2 is held by the flange 8 by these holding lips sandwiching the flange 8 formed at the opening of the trunk room. The seal part 3 is in pressure contact with the back surface of the trunk lid 9, and the auxiliary seal part 4 is attached to the podespring/l/
Pressure contact with 80.

The trim part 2 is made of solid rubber, and has a sheet metal insert member 6 embedded therein. Both sea/L' portions 3.4 are made of sponge rubber.

[Problems to be solved by the present invention]

By the way, when this type of weather strip is attached to the flange 8, the auxiliary seal part number receives the reaction force of the body spring/L'80, and the weather strip has a sixth
When a force is applied in the direction of arrow B in the figure, the trunk lid 9 collapses toward the interior of the vehicle, and when the trunk lid 9 is pressed from above in this state, the trunk lid 9 collapses more. This reduces the sealing force of the auxiliary seal portion 4 and the retaining lip 5a, making it easier for water to enter the trim sieve. Tip 51 of the side holding lip 5a
A countermeasure has been made in which a is made of sponge rubber to improve adhesion to the flange 8, but a sufficient waterproof effect is not always obtained.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to solve the above-mentioned conventional problems by preventing the above-mentioned collapse of the ζ weatherstrip and thereby improving the sealing performance. .

[Means for solving problems]

Weathers of the present invention) The IJ tube is characterized by an insert member embedded in the trim portion. That is, as shown in FIG. 1, the insert member 6 is made of synthetic resin and has a protrusion 61 extending into each of the holding lips 5a, 5b, 5Q, and 56. Among the retaining lips, at least the tip of the lowest retaining lip 5b on the outside of the vehicle interior (outside the flange) is made of sponge rubber.

[action, effect]

Insert members 6 protrude inside each retaining lip 5a, 5b, 50, 5d, so the rigidity of the retaining lip is strengthened to prevent the weatherstrip from falling down, and the tip of the retaining lip 5a on the outside of the vehicle interior is made of sponge. Since it is rubber,
Immediately sticky sealing properties are maintained.

The reason why the insert member 6 is made of synthetic resin is that if the insert member 6 is made of metal, the protruding part will hardly burn if it is made to protrude into the retaining lip. This is because the flange of the flange may be damaged, and the protruding portion of the synthetic resin can bend when the flange is inserted, so there is almost no chance of the retaining lip being torn, and even if a slight tear occurs in some areas. Since the flange and the synthetic resin come into contact, the flange will not be damaged.

〔Example〕

FIG. 1 shows an embodiment of the present invention, and FIG. 2 is an enlarged view of the main parts thereof. As shown in the figure, the weatherstrip IA includes a trim part 2 having a U-shaped cross section, a hollow seal part 3, and a lip-shaped auxiliary seal part 4. Retaining lips 5a, 5b, 5Q, and 5d protrude from opposing surfaces within the trim portion 2.

The trim part 2 is made of synthetic resin, such as vinyl chloride resin, AB
An insert member 6 made of S resin is embedded. The insert member 6 is provided with a protrusion 61 extending from the base of each retaining lip to the intermediate portion. Retaining lips 5a, 5b
, 5Q.

5d, the lower retaining lip 5a is located outside the flange 8 (FIG. 5) when the weather strip is attached, and its tip 51a is made of sponge rubber. The other parts of the trim part 2 are made of solid rubber.

Note that the tips of both the outer holding lips 5a and i5b may be made of sponge rubber. Alternatively, as shown in FIG. 3, the entire holding lip may be made of sponge rubber.

Next, a method for manufacturing the above-mentioned Weathers IJ tube IA will be explained.

FIG. 4 shows the insert member.

To obtain the insert member, a long plate 60 of synthetic resin having two protrusions 61 on each side of one surface is extruded. A large number of slots 62 are formed by punching in the center of the long plate 60 in the width direction, extending in the width direction and arranged at predetermined intervals in the longitudinal direction. At this time, cut lines 63 extending from both ends of every other slot 62 to the side edges of the elongated plate 60 are simultaneously formed on the other surface.

The insert member 6 thus obtained and the rubber material are integrally extruded to obtain an intermediate weather strip product shown in FIG. 3 is a seal part, 4 is an auxiliary seal part, 15a
, 5b15 (3 and 5d are holding lips, and 51a is a tip of the holding lip made of sponge rubber.

Next, by repeatedly applying vertical bending stress to the buried portion of the flat insert member 6, the insert member 6 is ruptured along the cut line 63 and separated into divided pieces.

Next, the buried portion is bent into a U-shape to obtain the weatherstrip 1A shown in FIG.

The weatherstrip IA thus obtained has excellent bending deformability because the insert member 6 is divided into divided pieces. And retaining lips 5a, 5b, 5
Q, 5d is the insert member 6 buried in -to
Rigidity is added to the protrusion 61. Therefore, when attaching the weather strip IA to the flange of an automobile body, a force in the direction of arrow B acts as shown in FIG.
Retaining lip, especially retaining lip 5b.

The reaction force of 5C prevents it from falling down. In addition, since the insert member 6 is made of synthetic resin, unlike a metal insert member, the protrusion of the insert member inside the retaining lip can bend when the flange is pushed between the retaining lips, so the flange pushing load is significantly reduced. The rubber of the retaining lip is rarely torn and the protrusion is exposed without increasing the number of times.

Furthermore, even if the protrusion is exposed locally and comes into contact with the flange during pushing, the flange will not be damaged because the protrusion is made of synthetic resin.

As mentioned above, the weather strip of the present invention does not fall down, and among the retaining lips 5a and 5b on the outside of the vehicle interior, at least the tip of the retaining lip 5a is made of sponge rubber and fits well with the flange. , water intrusion is prevented. In addition to the retaining lip 5a, the tips of the retaining lip 5b and the upper retaining lip 5d on the inside of the vehicle may also be made of sponge rubber. Since the lower retaining lip 5C is the retaining lip that receives the strongest force from falling down of the weatherstrip, it is desirable that the entire retaining lip 5C be made of solid rubber.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the weather strip of the present invention, FIG. 2 is an enlarged view of the main part of the weather strip shown in FIG. 1, and FIG. 3 is a view showing a modification of the portion shown in FIG. 2. , Fig. 4 shows the insert member used in the weather strip of the present invention, Fig. 4 (4) is a plan view, Fig. 4 (■) is an end view, Fig. 4 (C) is a side view, and Fig. 5 is a sectional view of an intermediate product of the weather strip shown in Fig. 1, Fig. 6 is a sectional view taken along the line A-A in Fig. 7, showing a state in which a conventional weather strip is installed, and Fig. 7 is a perspective view of an automobile. It is a diagram. IA... Weatherstrip 1B of the present invention...
... Conventional weather strip 2 ... Trim part 3 ... Seal part 4 ... Auxiliary seal part 5a, 51), 50.5d - - - - - Holding Lip 6...Insert member 61...Protrusion 8...Flange 9 of the automobile body...
Trunk lid (opening/closing member)'; Figure F1/20 Figure 3 Whistle 40 Figure 5

Claims (1)

[Claims] A trim part having a U-shaped cross section and a retaining lip protruding from the opposing inner surfaces, a seal part protruding from the outer surface of the trim part, and an insert member with a U-shaped cross section embedded in the trim part, formed on the opening edge of the vehicle body. In the automobile weatherstrip, the flange is inserted into the trim portion and held between the retaining lips, and the seal portion is brought into pressure contact with an opening/closing member that opens and closes an opening in the vehicle body, wherein the insert member is made of synthetic resin. In addition, the insert member is formed with a protrusion extending into each retaining lip, and at least the tip of the retaining lip located at the lowest stage on the outside of the flange when attached to the flange is made of sponge rubber. Automotive weather strip featuring: