JPH0639207B2 - Weather strip for automobile back door - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather strip used for a seal of an up-and-down opening type back door structure in which a back door body of an automobile and a back window glass can be independently opened and closed in a vertical direction. Regarding

2. Description of the Related Art For example, as shown in FIG. 5, in a so-called up-and-down type back door structure in which a back door body 1 having a door hinge at a lower portion of a vehicle body and a back window glass 2 having a door hinge at an upper portion of a vehicle body can be opened and closed in a vertical direction, respectively. For the back door body 1 side, a weather strip (not shown) attached to the peripheral portion of the back door 1 is sealed by elastically contacting the vehicle body side, whereas for the back window glass 2 side, the back door opening is formed. The back windshield 2 is elastically contacted with the weather strip 3 mounted on the peripheral edge of the upper half portion of the portion to be sealed.

The weather strip 3 has a welt portion 8 having a substantially U-shaped cross section which is fitted to a flange portion 7 formed upright from the vehicle body side general surface 6 in the general portion 4 as shown in FIGS. 6 and 7. , A hollow seal lip 9 formed integrally with the welt portion 8, and on the other hand, the terminal portions 5 (the joint portion between the back door body 1 and the back window glass 2) at both ends of the general portion 4 are The inclined sealing surface 10 is formed, and when the back door body 1 is closed, the weather strip on the back door body 1 side elastically contacts the sealing surface 10.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the conventional structure as described above, FIGS.
As shown in the figure, the inner part of the flange fitting groove 11 of the welt part 8 is filled with, for example, a viscous butyl-based sealant 12 to improve the sealing property with the flange part 7. However, if the sealant 12 is cut off in the middle and the seal is insufficient, for example, rainwater or the like may get over the top of the flange portion 7 in FIG.

Rainwater that has flooded into the passenger compartment is not immediately dripped into the passenger compartment, and gradually propagates downward (in the direction of arrow A in FIG. 9) along the side surface 7a of the flange portion 7 on the passenger compartment side and the welt portion 8, for example. Will flow down to.

However, from the general portion 4 to the end portion 5 of the weather strip 3, as is apparent from FIGS. 6 and 9, the flange portion 7 and the flange fitting groove 11 fitted therein are formed.
Since there is a break just before the terminal part 5, there is no escape place for rainwater or the like that has entered the inside of the vehicle as described above, and as a result water drops D are dropped from the part where the flange 7 is cut into the vehicle. May occur.

The present invention has been made in view of the above problems,
It is an object of the invention to provide a structure capable of effectively guiding rainwater or the like from the portion where the flange portion is interrupted to the outside of the vehicle compartment as described above.

Means for Solving the Problems The present invention has a back door structure of a vertically openable type in which a back door body having a door hinge at a lower portion of a vehicle body and a back window glass having a door hinge at an upper portion of a vehicle body can be independently opened and closed in a vertical direction. A weather strip for a back door that is attached to the upper half edge of the back door opening and is in elastic contact with the back window glass, and has a substantially U-shaped cross section that fits into a flange portion formed upright on the general surface of the vehicle body. A general portion having a welt portion and a seal lip integrally formed with the welt portion, and terminal portions integrally formed at both longitudinal ends of the general portion and in pressure contact with a general surface on the vehicle body side. From the end to the portion of the terminal portion that is in pressure contact with the general surface on the vehicle body side, the welt portion makes elastic contact with the root portion of the flange portion on the vehicle interior side, The part is characterized by forming a dam seal lip that is elastically in contact with the general surface of the vehicle body while being bent to the outside of the passenger compartment across the flange part.

Action According to the above structure, the dam seal lip works as if the flange portion was extended to the terminal side.Therefore, rainwater is defined by the welt portion, flange portion and dam seal lip. After passing through the space defined by the general surface of the vehicle body, the pressure contact surface of the terminal, and the dam seal lip, the vehicle on the opposite side of the passenger compartment with the flange Guided outdoors.

Embodiment FIG. 1 to FIG. 4 are views showing a more specific embodiment of the present invention. Particularly, FIG. 1 is a perspective view of the vicinity of the terminal portion 5 as seen from the press contact surface 5a side, and FIG. The drawing shows the sectional shape at the same sectional position as FIG. 7, and FIG. 3 shows the sectional shape at the same sectional position as FIG.

As shown in FIGS. 1 to 4, it is different from the conventional one in that a dam seal lip 21 having a rectangular cross section is formed to project from the vicinity of the terminal portion 5 of the welt portion 8 to the pressure contact surface 5a of the terminal portion 5. Is different. That is, the dam seal lip 21
Is a flange fitting groove 1 as shown in FIG. 1 and FIG.
1 is formed so as to make elastic contact with the flange portion 7 at the tip of one leg portion 8a on the vehicle interior side of the welt portion 8, while the flange fitting groove 11 and the flange portion 7 are provided.
When it breaks at its end portion 22, the dam seal lip 21 gradually changes its direction as if it is twisted, and the dam seal lip 21 reaches the pressure contact surface 5a of the terminal portion 5 which is in pressure contact with the vehicle body side general surface 6 and the welt portion. Just 90 for position at 8
The protrusions are formed in different directions so as to elastically contact the vehicle body side general surface 6. And dam seal lip 2
In the pressure contact surface 5a, 1 is bent to the outside of the vehicle compartment on the side opposite to the vehicle interior side with the flange portion 7 interposed therebetween.

In such a structure, as shown in FIGS. 1 to 3, the dam seal lip 21 elastically contacts the side surface 7a of the flange portion 7 on the vehicle interior side at the portion where the flange portion 7 is present, while the dam portion at the terminal portion 5 is damped. The seal lip 21 makes elastic contact with the vehicle body side general surface 6.

Therefore, rainwater or the like that has spilled around to the side surface 7a of the flange portion 7 changes its direction along the dam seal lip 21 from the space 23 (FIG. 2) defined by the flange portion 7 and the dam seal lip 21, As shown in FIG. 4, after passing through a space 24 (FIG. 4) defined by the terminal portion 5, the dam seal lip 21 and the vehicle body side general surface 6, it flows down to the outside of the vehicle compartment.

Then, rainwater or the like that has flowed out of the terminal portion 5 to the outside of the vehicle compartment is formed by a weather strip (not shown) on the back door body 1 side elastically contacting the periphery of the lower half of the back door opening. It is discharged below the vehicle body through the channel.

Here, as a concrete molding method of the above-mentioned dam seal lip 21, solid rubber or sponge rubber may be simultaneously molded at the time of molding the general portion 4 and the terminal portion 5 of the weather strip 3, or the dam seal lip 21 may be formed. The weather strip 3 which does not have it may be formed in advance, and the dam seal lip 21 made of, for example, sponge rubber may be attached and fixed thereto later by means such as adhesion.

EFFECTS OF THE INVENTION As described above, according to the present invention, rainwater and the like can be guided to the outside of the vehicle compartment through the terminal portion from the portion where the flange portion to be fitted with the welt portion of the general portion is interrupted, and thus, as in the conventional case. Rainwater, etc. does not drip inside the vehicle compartment, and the sealing performance is significantly improved.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, and is a perspective view of the vicinity of the terminal portion as seen from the pressure contact surface side, and FIG. 2 is also VII-VII of FIG.
3 is a sectional view taken along line III-III in FIG. 2, FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, and FIG. Fig. 6 is a rear perspective view of an automobile having a back door, Fig. 6 is an enlarged view of B portion of Fig. 5, and Fig. 7 is a view showing an example of a conventional weather strip, and is a VII of Fig. 6.
-VII is a sectional view taken along line VII, FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 9, and FIG. 9 is a sectional view taken along line IX-IX in FIG. 7. 1 ... Backdoor body, 2 ... Backwind glass, 3 ...
Weather strip, 4 ... General part, 5 ... Terminal part, 5a ...
Pressure contact surface, 6 ... General surface on the vehicle body side, 7 ... Flange portion, 8 ... Welt portion, 9 ... Seal lip, 21 ... Dam seal lip.

Claims (1)

[Claims] 1. A back door structure having a back door body having a door hinge at a lower portion of a vehicle body and a back window glass having a door hinge at an upper portion of the vehicle body which can be independently opened and closed in a vertical direction, and has a back door opening portion. A weather strip for a back door, which is attached to a peripheral edge of an upper half portion and is in elastic contact with a back window glass, and includes a welt portion having a substantially U-shaped cross section fitted to a flange portion formed upright on a general surface of a vehicle body and the welt. A general portion having a seal lip integrally formed with the portion, and terminal portions integrally formed at both longitudinal ends of the general portion and in pressure contact with the vehicle-body-side general surface. In the welt part, the flange part is elastically contacted with the root part of the interior side of the passenger compartment, while the end part is not covered with the flange part. Nde weather strip for an automobile back door, characterized in that the formation of the dam seal lip elastically contacts the vehicle body general surface while bending the vehicle exterior.