JPH10931A - Weatherstrip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To heighten sealing capability in the vicinity of a joint part between an extrusion-molded part and a die molded part without causing the lowering of moldability so as to secure uniform and excellent sealing capability. SOLUTION: A seal part 21 of a die molded part 20 of a weatherstrip is brought into elastic contact with a body panel with a required face-to-face distance at the time of an automobile door being closed. The seal part 21 is therefore deformed elastically into required shape around a bending point B so as to adhere closely to the body panel, thus securing required sealing capability between a door sash or a door panel and the body panel. That is, when the seal part 21 is elastically deformed around the bending point B, reinforcing beads 26, 26 forming a pair with the bending point B in between are brought into elastic contact with the required face-to-face distance so as to impede the sudden change of rigidity of the seal part 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather strip which is provided, for example, around a door opening of an automobile and secures a required sealing property by elastically deforming a hollow sealing portion. The present invention relates to a structure of a weather strip capable of obtaining good sealing properties in the vicinity of a joining portion of a molded portion.

[0002]

2. Description of the Related Art Conventionally, as a weather strip used in the vicinity of a door opening of an automobile, as shown in FIGS. 7 and 8, an extruded portion (not shown) formed by extrusion is formed by molding. In some cases, the molded parts 40 are joined together. The extruded part and the molded part 40 are
Each of them is formed in a required shape having a hollow seal portion 41, and is usually simultaneously bonded to an extrusion molding portion by vulcanization when the molding portion 40 is molded.

A seal portion 41 is provided on an inner surface 42 of the seal portion 41 in the vicinity of a joint portion between the extruded portion and the molded portion 40.
Four reinforcement beads 43 are provided along the circumferential direction of the inner surface 42 along the longitudinal direction. The reinforcing bead 43 prevents the sudden change in the rigidity near the joining portion between the extruded portion and the molded portion 40, thereby enhancing the sealing performance of the sealing portion 41, and preventing water leakage from the vicinity of the joining portion. Things. Here, FIG. 9 shows a state in which the door is elastically contacted with the body panel 45 when the door is closed.

[0004] Further, as shown in FIG.
A weather strip has also been proposed in which the molding material 51 is poured in between 0 and the thickness of the sealing portion 52 is increased to thereby further enhance the sealing property in the vicinity of the joint between the extruded portion (not shown) and the molded portion 53. I have.

[0005]

Among the above-mentioned conventional weather strips, the former weather strip shown in FIGS. 7 to 9 has an improved sealing property in the vicinity of the joint between the extruded part and the molded part 40. Although you can
There has been a problem that a sufficient sealing property cannot be ensured for a pressure higher than required.

In the latter weather strip shown in FIG. 10, the sealing performance in the vicinity of the joint between the extruded part and the molded part 53 is considerably improved as compared with the former weather strip shown in FIGS. Can be
Since the fixing of the seal portion 52 of the extruded portion is insufficient, there is a fear that a problem such as the molding material 51 flowing to the surface during the molding may occur, and there is a problem that the moldability is reduced.

An object of the present invention is to provide a weather strip which can ensure a uniform and good sealing property especially in the vicinity of a joint portion between an extruded portion and a molded portion without lowering the moldability. It is in.

[0008]

An object of the present invention is to provide a weather strip according to claim 1, wherein the extruded portion is formed into a required shape having a hollow seal portion by extrusion, and the hollow is formed by molding. In a weather strip which is formed in a required shape having a seal portion and includes a mold forming portion joined to the extruded portion and secures required sealability by elastically deforming the seal portion,
A plurality of reinforcing beads are provided along the longitudinal direction of the inner surface of the seal portion in the vicinity of the joining portion of the extruded portion and the molded portion, the spacing in the cross-sectional direction between at least some of the adjacent reinforcing beads, The present invention can be solved by a weather strip, wherein the reinforcing beads are set so as to be in elastic contact with each other when the seal portion is elastically deformed to a required inter-plane distance.

In the weather strip having the above structure according to the present invention, a plurality of reinforcing beads are provided along the longitudinal direction of the inner surface of the seal portion in the vicinity of the joint between the extruded portion and the molded portion. The interval in the cross-sectional direction between adjacent predetermined reinforcing beads among the plurality of reinforcing beads is such that when the seal portion is elastically deformed to a required distance between the surfaces, the reinforcing beads elastically contact each other to increase rigidity. It is set to secure. Therefore, particularly, the sealing property in the vicinity of the joining portion between the extruded portion and the molded portion can be reliably ensured even when the pressure is more than required.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a weather strip according to the present invention will be described below in detail with reference to FIGS. FIG. 1 is a schematic plan view showing a first embodiment of a weather strip of the present invention, FIG. 2 is a schematic perspective view showing a molded portion of the weather strip of FIG. 1, and FIG. 3 is a sectional view taken along the arrow A of FIG. FIG. 4 is a sectional view showing the elastic deformation state of FIG.

As shown in FIG. 1, a weather strip 10 according to the present embodiment is provided over the entire inside of a door sash or a door panel of an automobile (not shown). Extrusion parts 12 and 12 along the periphery except for the bottom part and the lower left corner, a molding part 20 along the upper right corner of the door opening and a molding part 3 along the lower left corner in the figure.
0. This weather strip 10
When the car door is closed, the body panel 11
(See FIG. 4) with a required surface-to-surface distance, so that a required sealing property between the door sash or the door panel and the body panel 11 is ensured.

The extruded portions 12, 12 are formed by extrusion into a required shape along the periphery of the door opening except for the upper right corner and the lower left corner in the figure, and have a hollow seal portion. . For the weatherstrip 10 of the present embodiment, the molded part 20 will be described, and detailed description of the extruded parts 12, 12 and the molded part 30 will be omitted.

As shown in FIG. 2, the molded part 20 is formed by molding into a required shape along the upper right corner of the door opening (in this embodiment, a shape bent substantially at right angles). And has a hollow seal portion 21. And
As shown in FIG. 1, the left end face 22 and the lower end face 23 in the figure of the molded part 20 are respectively the right end face 1 in the figure of the extrusion molded part 12.
3 and the upper end surface 14 are simultaneously vulcanized. In addition, the molded part 20 and the extruded part 12 are provided with fitting parts 24 that can be fitted to door sashes, respectively. The weather strip 10 is such that each fitting part 24 is fitted inside the door sash. To be attached to the door opening frame.

As shown in FIGS. 3 and 4, when the door is closed, the sealing portion 21 of the molded portion 20 is elastically contacted with the body panel 11 with a required surface-to-surface distance. As shown in FIG. 4, the upper and lower virtual bending points B (hereinafter simply referred to as bending points B) are elastically deformed as shown in FIG. The required sealing properties are ensured.

A plurality of reinforcing beads 26 are provided on the inner surface 25 of the seal portion 21 in the vicinity of the joint portion between the extruded portion 12 and the molded portion 20 along the longitudinal direction of the seal portion 21 in the cross-sectional direction of the seal portion 21. Have been. That is, a total of four reinforcing beads 26 are provided on the inner surface 25 of the seal portion 21 in the vicinity of the joint portion between the extruded portion 12 and the molded portion 20 with the bending point B interposed therebetween. The reinforcing beads 26 forming a pair are provided at predetermined intervals so as to elastically contact with a required inter-plane distance when the seal portion 21 elastically deforms around the bending point B.

The operation of the above-described weather strip of the embodiment will be described. As shown in FIG.
When the door of the automobile is closed, the seal portion 21 is elastically deformed around the bending point B by being elastically contacted with the body panel 11 with a required inter-surface distance, and is tightly attached to the body panel 11 to close the door sash. A required sealing property is secured between the body panel 11 and the body.

A pair of reinforcing beads 26 sandwiching the inflection point B
When the seal portion 21 elastically deforms around the bending point B, the elastic portions come into contact with each other with a required distance between the surfaces. This allows
In particular, in the vicinity of the joining portion between the extruded portion 12 and the molded portion 20, there is no rapid change in rigidity, the degree of adhesion between the seal portion 21 and the body panel 11 is increased, and the uniformity is good over the entire circumference of the door opening. A good sealing property is obtained.

Next, a weather strip according to a second embodiment of the present invention will be described in detail with reference to FIGS. FIG. 5 is a cross-sectional view showing a molded part of a weather strip according to a second embodiment of the present invention, and FIG. 6 is a cross-sectional view showing a state of the molded part of FIG. 5 at the time of sealing.

As shown in FIGS. 5 and 6, the sealing portion 31 of the molded portion 20 is formed in a substantially trapezoidal shape, and elastically deforms around the bending point B during sealing. Other configurations and operations are the same as those of the first embodiment.

As described above, according to each of the above embodiments, when the seal portions 21 and 31 elastically deform around the bending point B, the reinforcing beads 26 forming a pair with the bending point B interposed therebetween are required. Elastic contact at a distance between the surfaces, especially in the vicinity of the joint between the extruded part 12 and the molded part 20, there is no sudden change in rigidity, and the degree of adhesion between the seal parts 21, 31 and the body panel 11 can be increased. It can be performed without lowering the moldability. As a result, uniform and good sealing properties can be ensured over the entire periphery of the door opening of the automobile.

In each of the above-described embodiments, the bending points B are set at two cross sections of the seal portions 21 and 31, and the reinforcing beads 26 are paired with the bending point B on the inner surface 25 of the seal portions 21 and 31 interposed therebetween. Although a total of two pairs are provided, it is needless to say that the present invention is not limited to such a configuration. In other words, at least one pair of reinforcing beads are arranged with the bending point interposed therebetween, and at the time of sealing, the reinforcing beads forming a pair with the bending point interposed therebetween elastically contact with a required distance between the surfaces, and the bending point is set. The position and the number, the shape, the number, and the length of the reinforcing beads may be appropriately determined by experiments or the like.

[0022]

As described above, according to the weather strip of the present invention, a plurality of reinforcing beads are provided along the longitudinal direction of the inner surface of the seal portion in the vicinity of the joint between the extruded portion and the molded portion. The interval in the cross-sectional direction between at least some of the reinforcing beads adjacent to each other is set such that the reinforcing beads are in elastic contact with each other when the seal portion is elastically deformed by a required inter-plane distance. ing. Therefore, when the seal portion is elastically deformed, the reinforcing beads adjacent to each other in the cross-sectional direction of the seal portion elastically contact with each other with a required distance between the surfaces. There is no significant change, and the sealing performance can be improved. Therefore, uniform and good sealing properties can be secured.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing a weather strip according to a first embodiment of the present invention.

FIG. 2 is a schematic perspective view showing a molded portion of the weather strip of FIG. 1;

FIG. 3 is a sectional view taken in the direction of arrow A in FIG. 2;

FIG. 4 is a cross-sectional view showing a state at the time of sealing of FIG. 3;

FIG. 5 is a sectional view showing a molded part of a weather strip according to a second embodiment of the present invention.

6 is a cross-sectional view showing a state at the time of sealing in FIG. 5;

FIG. 7 is a schematic perspective view showing a molding part of a conventional weatherstrip.

FIG. 8 is a cross-sectional view taken along the arrow C in FIG. 7;

FIG. 9 is a cross-sectional view showing a state at the time of sealing in FIG. 8;

FIG. 10 is a cross-sectional view showing another example of a conventional weather strip molding.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Weather strip 11, 45 Body panel 12 Extrusion molding part 20, 30 Mold molding part 21, 31 Seal part 24 Fitting part 25 Inner surface of seal part 26 Reinforcement bead B Bending point of seal part

Claims (1)

[Claims] An extruded part (12) formed into a required shape having a hollow seal part by extrusion molding, and a required shape having a hollow seal part (21) formed by molding. In a weather strip (10) including a molding part (12) and a mold molding part (20) joined to the sealing part (21) to elastically deform the seal part (21) to secure a required sealing property, the extrusion molding part ( A plurality of reinforcing beads (26) are provided along the longitudinal direction of the inner surface (25) of the seal portion (21) in the vicinity of the joint portion between the 12) and the molded portion (20), and at least a part of the adjacent beads is provided. The spacing in the cross-sectional direction between the reinforcing beads (26, 26) is such that when the seal portion (21) is elastically deformed to a required inter-plane distance, the reinforcing beads (26, 26) are in an elastic contact state. A weatherstrip characterized by being set to be.