JP2966324B2 - Corner connection structure of car door glass run - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass run corner connecting structure disposed along the inner periphery of a door frame of an automobile.

[0002]

2. Description of the Related Art There is, for example, a structure described in Japanese Utility Model Laid-Open No. 17421/1990 as a corner portion connecting structure of a door glass run of this kind.

In this prior art, as shown in FIGS. 5 and 6, an up / down door glass 54 of a door glass run 53 disposed along the inner periphery of a door frame 52 of an automobile door 51 is raised. When connecting the glass run horizontal portion 55 on the upper side, which is to be pressed when it is raised to the limit position, and the glass run vertical portion 56 for guiding the vertically movable door glass 54, the glass run horizontal portions individually extruded and formed. The end portions of the portion 55 and the glass run vertical portion 56 are arranged close to each other and opposed to each other, and a corner forming portion 57 is integrally formed between the two end portions by a mold forming method, thereby forming the corner forming portion. The grass run horizontal portion 55 and the grass run vertical portion 56 are connected to each other via 57.

A corner forming portion 57 is attached to an outer lip 58 of the horizontal portion 55 of the glass run and an outer lip 59 of the vertical portion 56 of the glass run to be exposed to the outside of the vehicle.
Since it is inevitable that the joints 60a and 60b are generated at the boundary between the outer lips 58 and the outer lips 58 and 5 so that no step is formed at the joints 60a and 60b.
9 and the corner forming portion 57 are smoothly connected.

The outer lip 58 of the glass run horizontal portion 55 forms a hollow lip 63 together with a bridge-shaped seal lip 62 provided between the outer lip 58 and the main body 61.

[0006]

In the conventional structure as described above, when the door glass 54 is raised to the upper limit position, the upper end surface 54a of the door glass 54 is
As a result, the entire hollow lip 63 is pushed upward and is compressed and deformed. For this reason, a local tensile force is applied to the lower joint 60b with the compression deformation of the hollow lip 63, and a crack 64 as shown in FIG. Absent.

This is because the joints 60a and 60b do not have sufficient strength against a tensile load as compared with the other general parts due to the so-called seam between the extruded part and the mold part. In particular, when a core metal having a substantially U-shaped cross section is buried in the glass run vertical portion 56 itself, the glass run vertical portion 56 is prevented from being elongated and deformed in the longitudinal direction. The occurrence becomes even more pronounced.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a structure in which a crack is prevented from being generated at a joining portion between a vertical portion of a glass run and a corner forming portion.

[0009]

SUMMARY OF THE INVENTION The present invention provides a glass run disposed along the inner periphery of a door frame of an automobile,
An upward / downward-type door glass has a glass run horizontal portion on the upper side where the glass run is pressed at its limit position, and a glass run vertical portion extending downward from the glass run horizontal portion to guide the door glass, and a terminal of the glass run horizontal portion The glass run horizontal portion and the glass run vertical portion are formed by placing the corner portion and the terminal portion of the grass run vertical portion close to each other and facing each other, and then molding a corner formed portion between them by molding. A flat hollow lip against which the upper end surface of the door glass is pressed against the horizontal portion of the glass run, while the corner molding portion is also formed of a door glass. A corner hollow lip portion having the same cross-sectional shape as the hollow lip is formed continuously with the hollow lip while the upper end surface thereof is pressed against the hollow lip.

The joint between the outermost surface of the outside of the vehicle and the corner forming portion in the vertical portion of the glass run is set at a position lower than the corner hollow lip portion. The thickness of the portion where the end face is directly pressed is smaller than the thickness of an equivalent portion of the hollow lip.

As a more specific form of the glass run vertical portion, the glass run vertical portion itself is formed as having a substantially C-shaped cross section, and a metal core having a substantially U-shaped cross section is provided inside the glass run vertical portion. Sometimes buried.

As described above, the thickness of the corner hollow lip portion of the corner molding portion where the upper end surface of the door glass is directly pressed against is formed to be thinner than the thickness of the equivalent portion of the hollow lip in the horizontal portion of the glass run. Therefore, when the glass run horizontal part is pushed up together with the corner forming part due to the rise of the door glass, the upper end surface of the door glass is directly pressed against the glass run horizontal part side hollow lip and the corner forming part side. Although the lower portions of the corner hollow lip portions undergo elongation deformation, respectively, the thinner formed corner hollow lip portions undergo larger elongation deformation than the hollow lip on the glass run horizontal portion side. In other words, the tensile force applied to the corner formed portion when the door glass is raised is dispersed throughout the thin portion of the corner hollow lip portion and is actively borne as elongation deformation. Is reduced, and the occurrence of cracks due to the concentration of tensile stress at the junction as in the prior art can be prevented.

[0013]

1 to 4 show a typical embodiment of the present invention. As shown in FIGS. 1 and 2, a door glass run 1 has a uniform cross-sectional shape by a known extrusion molding method. 5 and a glass run horizontal portion 2 which is arranged along the upper side of the door frame 52 shown in FIG. 5 and a terminal of the glass run horizontal portion 2 which is also formed as having a uniform cross-sectional shape by extrusion molding. Vertical portion 3 extending downward from the portion, and horizontal portion 2 of the glass run.
And a corner forming portion 4 located between the terminal portions of the glass run vertical portion 3 and connecting them. And
The upper end surface 5 a of the door glass 5 comes into pressure contact with the glass run horizontal portion 2 when the door glass 5 rises,
The glass run vertical portion 3 serves to guide the vertically movable door glass 5.

The glass run horizontal portion 2 has a relatively thick main body portion 6, a seal lip 7 formed integrally and obliquely from the lower end of the main body portion 6 so as to come into sliding contact with the door glass 5, Similarly, the glass run horizontal portion 2 itself includes a flat hollow lip 8 integrally formed at the upper end portion of the main body portion 6 and auxiliary lips 9 and 10 formed at the rear side of the main body portion 6. Is fitted and held on the upper side of the door frame 52 shown in FIG. 5 via a retainer or the like (not shown). The hollow lip 8 includes an outer lip 11 serving as an outermost surface on the vehicle outer side, and a support lip 12 provided in a bridge shape between the outer lip 11 and the main body 6.
When the door glass 5 has risen to the upper limit position, the upper end face 5a of the door glass 5 comes into pressure contact with the seal lip 13. While only the seal lip 13 of the glass run horizontal portion 2 is formed of sponge rubber, the other portions are formed of solid rubber. Further, a joining portion (joining surface) 15 which is perpendicular to the longitudinal direction of the end portion of the glass run horizontal portion 2 is provided.
Are formed, and the horizontal section 2 and the corner forming section 4 are joined at the joining section 15 as described later.

On the other hand, the glass run vertical portion 3 is a channel-shaped main body 1 in which a metal core 16 having a substantially U-shaped cross section is embedded.
7 and seal lips 18 and 19, which are formed to project obliquely inward at the opening edges of the main body 17, respectively, are formed into a generally C-shaped cross section as shown in FIG. The door frame 52 is fitted and held on a vertical side along the center pillar. As will be described later, a corner forming section 4 is provided at the end of the glass run vertical section 3.
(Joining surface) 20 is formed for joining with the substrate. As shown in FIG. 4, the joint portion 20 is formed as a stepped shape such that a portion outside the vehicle compartment projects upward from a portion inside the vehicle compartment.

The end of the glass run horizontal portion 2 and the end of the glass run vertical portion 3 are brought close to each other under the arrangement shown in FIG. 1 and opposed to each other by a known molding method. By forming the corner forming section 4, the glass run horizontal section 2 is formed through the corner forming section 4.
And the terminal portion of the glass run vertical portion 3 are integrally connected to each other.

More specifically, the corner forming portion 4 also includes a corner hollow lip portion 21 having the same cross-sectional shape as being continuous with the hollow lip 8 on the glass run horizontal portion 2 side. A corner seal lip portion 22 having the same cross-sectional shape as the seal lips 7 and 18 on the glass run vertical portion 3 side is included, and the hollow lip 8 on the grass run horizontal portion 2 side is connected to the glass run vertical portion 3 via the corner hollow lip portion 21. While the seal lips 7, 18 on the glass run horizontal portion 2 and the glass run vertical portion 3 side are smoothly continuous with each other via the corner seal lip portion 22.

Then, of the corner hollow lip portion 21 on the corner forming portion 4 side, the upper end surface 5a of the door glass 5 is directly pressed and contacted, that is, as shown in FIG. 3, continuous with the seal lip 13 on the hollow lip 8 side. Seal lip part 2
3, the thickness t of the seal lip 1 on the hollow lip 8 side
3 is formed thinner than the wall thickness.

Here, since the use of a core is indispensable to make the corner hollow lip portion 21 hollow when forming the corner forming portion 4, the end surface of the corner hollow lip portion 21 is required. As shown in FIG. 2, the hollow portion 14 is open to the outside as a core removal hole 14a.

Therefore, according to such a corner connection structure, as shown in FIGS.
When the door glass 5 guided to the upper side is raised to the ascending limit position, the upper end surface 5a of the door glass 5 has the sealing surface 13 of the hollow lip 8 in the glass run horizontal portion 2 and the corner hollow lip portion in the corner forming portion 4. 21, the glass run horizontal portion 2 is pushed up together with the corner forming portion 4 while being compressed and deformed.

At this time, although the pulling force accompanying the above-mentioned pushing force spreads to the entire corner forming portion 4,
In the seal lip portion 23 formed to be thin, the elongation deformation is further increased over the entire length thereof than the seal lip 13 on the hollow lip 8 side. As a result, much of the tensile force applied to the corner forming portion 4 is borne by the elongation deformation of the seal lip portion 23, so that an unreasonable force is not applied to the joining portion 20 below the corner hollow lip portion 21. It is possible to prevent the occurrence of cracks due to stress concentration at the joint 20 as described above.

That is, the tensile force applied to the corner forming portion 4 by the contact with the door glass 5 is applied to the door glass 5.
By dispersing over the entire length of the thin seal lip portion 23 to be directly pressed against the glass lip portion 23 and positively bearing the extension deformation of the seal lip portion 23, the tensile force applied to the joint portion 20 with the glass run vertical portion 3 In particular, as shown in FIGS. 1 and 2, a metal core 16 having a substantially U-shaped cross section is buried in the vertical section 3 of the glass run, and the glass run vertical section 3 itself is elongated and deformed in the longitudinal direction. Is suppressed, it is possible to prevent the occurrence of cracks in the above-mentioned joint 20.

[0023]

As is apparent from the above description, according to the present invention, a flat hollow lip against which the upper end surface of the door glass is pressed against the glass run horizontal portion is formed, while the corner forming portion is formed. Similarly, in a structure in which a corner hollow lip portion having the same cross-sectional shape as the hollow lip is formed continuously with the hollow lip while the upper end surface of the door glass is pressed against the outermost surface of the outer side of the vehicle outside in the vertical portion of the glass run. The joint portion with the molding portion is set at a position lower than the corner hollow lip portion, and the thickness of the portion of the corner hollow lip portion where the upper end surface of the door glass is directly pressed against is set at the same position in the hollow lip. It is formed to be thinner than the wall thickness, and while dispersing the tensile force accompanying the pressure contact between the glass run horizontal part including the corner forming part and the door glass to the thin part, the thin part is formed. By which is adapted to bear positively as minute elongation deformation, strain degree of the tensile force at the junction between the corner molding part and the glass run vertical portion is reduced accordingly. As a result, in particular, even when the core metal having a substantially U-shaped cross section is buried in the vertical section of the glass run, and the elongation deformation of the vertical section of the glass run itself in the longitudinal direction is suppressed, It is possible to avoid stress concentration in the tensile direction, and it is possible to prevent the occurrence of cracks in the joint as in the prior art.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of the present invention, and is a perspective view near a corner forming portion of a door glass run.

FIG. 2 is a right side view of FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a perspective view of the vicinity of a terminal portion of a vertical portion of the glass run shown in FIGS.

FIG. 5 is an explanatory front view of an automobile door.

FIG. 6 is an enlarged perspective view of a main part of FIG. 5;

FIG. 7 is an explanatory diagram when the door glass rises from the state of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Door glass run 2 ... Glass run horizontal part 3 ... Glass run vertical part 4 ... Corner molding part 5 ... Door glass 8 ... Hollow lip 13 ... Seal lip 16 ... Core metal 20 ... Joint part 21 ... Corner hollow lip part 23 ... Seal lip part 52… Door frame

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Claims (2)

(57) [Claims] 1. A glass run disposed along an inner periphery of a door frame of an automobile, a glass run horizontal portion at an upper side where an elevating door glass is pressed at an ascending limit position, and a glass run below the glass run horizontal portion. A glass run vertical portion that extends to guide the door glass, and a terminal portion of the glass run horizontal portion and a terminal portion of the glass run vertical portion are disposed in close proximity to each other, and a corner is formed between the two. The glass run horizontal portion and the glass run vertical portion are integrally connected to each other through the corner forming portion by molding a molding portion, and an upper end surface of a door glass is pressed against the glass run horizontal portion. While a flat hollow lip is formed, the upper end surface of the door glass is also pressed into the corner molding portion, and is continuously cut off from the hollow lip. A corner hollow lip portion having a shape is formed, and a joint portion between the outermost surface on the vehicle outside and the corner forming portion in the glass run vertical portion is set at a position lower than the corner hollow lip portion, and the corner hollow lip portion is formed. A corner portion connecting structure for an automobile door glass run, wherein a thickness of a portion of the lip portion where the upper end surface of the door glass is directly pressed against is formed thinner than a thickness of an equivalent portion of the hollow lip. 2. The glass run vertical portion is formed to have a substantially C-shaped cross section, and a core metal having a substantially U-shaped cross section is embedded inside the glass run vertical portion. The corner portion connecting structure of a door glass run for an automobile according to claim 1, wherein