JP2007161080A - Seal structure of door for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seal structure of a door for an automobile which reduces the manufacturing cost without deteriorating original sealing performance, prevents so-called reversal phenomenon of a seal lip or minimizes the apply amount of silicone. <P>SOLUTION: In the seal structure at the abutment part of the rear end of a door sash 3 of a rear door 1 and the front end of a rear side window glass 2, an auxiliary seal lip 6 at a door weather strip 4 side is elastically contacted to a garnish 7 mounted to the front end edge of the rear side window glass 2 to seal. A projection part 11 which the auxiliary seal lip 6 runs on by the contact with the minimum area at the over stroke position P1, and the auxiliary seal lip 6 does not contact at the door closed position (normal seal position) P2, is formed on the garnish 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a seal structure for an automobile door. For example, when a rear side window glass (also referred to as rear water glass) is disposed adjacent to a front hinge type front door or rear door on the rear side thereof, the door is provided. A door seal for automobiles in which at least the portion of the weather strip that faces the front end of the rear side window glass at the time of closing the door is elastically contacted with the edge decoration member on the side of the rear side window glass. Concerning structure.

  For example, when the rear side window glass 2 is disposed adjacent to the rear side of the front hinge type rear door 1 as in the case of a four-door wagon-type automobile shown in FIG. 3, the rear end of the door sash 3 and the rear side of the rear door 1 are arranged. At the portion where the front end of the wind glass 2 is abutted or directly opposed, the door weather strip 4 mounted on the peripheral edge of the rear door 1 is attached to the front end of the rear side window glass 2 as shown in FIG. May be sealed by elastic contact.

  More specifically, a door weather strip having a hollow main seal lip 5 and a tongue-like auxiliary seal lip 6 positioned on the outer side of the passenger compartment at the periphery of the rear door 1 including the door sash 3. On the other hand, a resin garnish 7 is attached to at least the front edge of the rear side window glass 2 as an edge decoration member. When the rear door 1 is closed under the door entry locus indicated by the symbol M, the main seal lip 5 is elastically contacted with the opening edge of the door opening portion that receives the rear door 1 in the vehicle body panel 8, The auxiliary seal lip 6 is elastically brought into contact with the garnish 7 and sealed with a so-called double seal structure by the door weather strip 4.

  In addition to the case where the garnish 7 is bonded and fixed to the rear side window glass 2, the garnish 7 itself is fixed to the rear side window glass 2 when the garnish 7 itself is formed by a so-called insert molding method using the rear side window glass 2 as an insert. There are cases where it has been.

  In such a structure, particularly when paying attention to the behavior of the auxiliary seal lip 6, in the closed state of the rear door 1, the auxiliary seal lip 6 is largely bent and is in surface contact with the vehicle body panel 8, When the door is opened, the auxiliary seal lip 6 bends in an inverted U shape due to the frictional force of the two, so that the resistance when the door is opened increases. There is a problem that sound is generated.

  More specifically, when the rear door 1 is to be closed, the rear door 1 passes through the original closing position and slightly overstrokes, and then is slightly restored to the door opening direction side by the reaction force of the door weather strip 4. Thus, it stops at the normal closing position. At that time, although the rear door 1 and the auxiliary seal lip 6 of the door weather strip 4 also overstroke, the tip of the auxiliary seal lip 6 remains in the overstroke position due to the frictional force with the garnish 7. Only the base side of the auxiliary seal lip 6 follows the rear door 1 and is slightly displaced in the door opening direction. This state is nothing but the excessive deformation state of the auxiliary seal lip 6, and this state is used as a trigger to reverse the auxiliary seal lip 6 when the door is opened.

  From the viewpoint that such a problem can be solved by improving the slip of the tip of the auxiliary seal lip 6 with respect to the garnish 7, it has been conventionally practiced to apply silicone to the surface of the seal lip 6 in advance. In addition to the increase in the number of work steps for the coating work, it is necessary to secure a certain amount of silicone film thickness or more when considering the durability, thereby further increasing the cost.

  Therefore, when the counterpart side to which the auxiliary seal lip 6 is elastically contacted is not the garnish 7 as described above but the vehicle body panel 8 itself, a protrusion is formed at the tip of the auxiliary seal lip 6 to provide an auxiliary seal for the vehicle body panel 8. Similar techniques have been proposed in Patent Document 1 and Patent Document 2 in which the contact area of the lip 6 and hence the frictional force are reduced, thereby eliminating the various problems described above.

In these similar techniques, as described above, both the main seal lip 5 and the auxiliary seal lip 6 are brought into elastic contact with the opening edge of the door opening on the vehicle body panel 8 side.
Japanese Patent Laid-Open No. 9-300963 JP 2000-255267 A

  However, in the techniques described in Patent Documents 1 and 2, the contact area of the auxiliary seal lip 6 with respect to the counterpart member, and hence the frictional force, is reduced, so that the so-called reverse phenomenon of the auxiliary seal lip 6 is prevented and the silicone coating amount is minimized. However, since the contact area of the seal lip 6 with the mating member is significantly reduced, the original sealing performance may not be maintained, which is not preferable in practice.

  The present invention has been made paying attention to such problems, and in particular, reduces the manufacturing cost without deteriorating the original sealing performance, thereby preventing the so-called reversal phenomenon of the seal lip and minimizing the silicone coating amount. The present invention provides a door door seal structure that can be limited.

  According to the first aspect of the present invention, a door weather strip having a seal lip is attached to the peripheral portion of the door of the automobile, and the seal lip is disposed at the rear side at a portion that faces at least the front end of the rear side window glass when the door is closed. In the sealing structure of an automobile door that is sealed by being elastically contacted with the edge decoration member on the wind glass side, the vehicle interior is more than the portion of the edge decoration member that functions as a sealing surface when the seal lip is elastically contacted when the door is closed. A protrusion having a minimal area and capable of contacting the seal lip is formed inside.

  Here, as described above, when closing the door, the door itself overstrokes by a predetermined amount from the original door closing position, and then the door is opened by the reaction force of the door weather strip or the like. Only when the direction is slightly restored, the door stops at the closed position. Therefore, as the position of the protrusion, as described above, when the door overstrokes, it contacts the seal lip, for example, in the form of a line contact, but when the door is slightly restored in the opening direction and stopped, Set the position so that it does not touch.

  In particular, in order to prevent the sticking phenomenon of the seal lip with respect to the protrusion, as described in claim 2, a plurality of discontinuous and independent protrusions along the longitudinal direction of the seal surface of the edge decoration member are provided. It is desirable to form.

  In order to stabilize the behavior of the seal lip, as described in claim 3, the seal lip extends from the mounting base portion of the door weather strip, and the free end of the seal lip is located on the outside of the passenger compartment. It is shaped to be bent at the substantially central part in the extending direction so as to be inclined toward the end, and when the door is closed, the tip side of the bent position is elastically contacted with the edge decoration member so as to function as a sealing surface It is desirable that

  In this case, as described in claim 4, the edge decoration member is a resin garnish attached to the front edge of the rear side window glass.

  According to a fifth aspect of the present invention, the door weatherstrip includes a tongue-shaped auxiliary seal lip positioned outside the vehicle compartment in addition to the hollow main seal lip. When the door is closed, it is desirable that the main seal lip is elastically contacted with the opening edge on the vehicle body side, and the auxiliary seal lip is elastically contacted with the garnish located outside the vehicle compartment side of the opening edge on the vehicle body side. .

  Therefore, in at least the first aspect of the present invention, when the door is closed, the seal lip of the door weather strip is elastically contacted with the sealing surface of the edge decoration member to bend and deform, and the door is overstroked by a predetermined amount. The seal lip rides on the protrusion. Thus, the seal lip riding on the protrusion means that the contact area between the seal lip and the seal surface on the edge decoration member side is minimized.

  Eventually, the door is slightly restored from the overstroke position in the door opening direction and stops at the original door closing position, but at that time, the contact area between the seal lip and the edge decoration member is minimal. In addition, the seal lip does not stay at the overstroke position but slips between the edge decoration members and displaces following the restoring operation of the door itself. As a result, when the door is stationary at the original door closing position, the seal lip also moves away from the protrusion and comes into contact with the sealing surface of the edge decoration member while resting at the normal sealing position, thereby exhibiting the original sealing function. become. Therefore, as long as the seal lip is in this state, the seal lip will not be reversed even when the door is opened.

  According to the first aspect of the present invention, the protruding portion capable of contacting the seal lip with a minimal area is formed on the vehicle interior side of the edge decoration member on the interior side of the vehicle interior rather than the portion that functions as a seal surface by elastic contact of the seal lip when the door is closed. As a result, when the door is restored from the overstroke position to the door closing position, the seal lip also follows the movement of the door and restores to the normal position and stops. In addition to being able to prevent the seal lip from reversing when the door is opened, the amount of silicone applied to the seal lip can be minimized, and in some cases, the silicone coating operation itself can be eliminated, reducing manufacturing costs. Can be achieved.

  According to the second aspect of the present invention, the plurality of discontinuous and independent protrusions are formed along the longitudinal direction of the seal surface of the edge decoration member. The contact area can be further reduced to ensure the slipperiness, and the seal lip can be prevented from being caught on the protrusion, and the door can be opened and closed more smoothly.

  According to the invention described in claim 3, the seal lip has a shape bent substantially at the center in the extending direction so that the tip end side is inclined toward the outside of the passenger compartment in a free state, When the door is closed, the tip end side of the bent position is elastically contacted with the edge decoration member so as to function as a seal surface, so that excessive deformation on the base side of the seal lip as in the prior art is prevented in advance. There is an advantage that reversal of the seal lip can be prevented more reliably.

  FIGS. 1A and 1B show a preferred embodiment of the seal structure for an automobile door according to the present invention, and FIG. 1A shows the AA line of FIG. (B) shows an enlarged view of the main part at the time of a so-called overstroke immediately before reaching the state shown in FIG. 1 that are the same as those in FIG. 4 are denoted by the same reference numerals.

  As shown in FIG. 1, the door weather strip 4 mounted on the door sash 3 of the rear door 1 has a hollow main seal lip 5 protruding integrally with the mounting base 9, and the main seal when the door is closed. A tongue-shaped auxiliary seal lip 6 is integrally formed so as to be located outside the vehicle compartment from the lip 5.

  The auxiliary seal lip 6 extends from the mounting base portion 9 of the door weather strip 4 to the rear side of the vehicle, and in the free state, substantially extends in the extending direction so that the tip end side is inclined toward the outside of the passenger compartment. It has a shape bent at the notch portion 10 at the center, and in a stationary state when the door is closed, the front end side of the notch portion 10 is attached to the front edge of the rear side window glass 2 as an edge decoration member. The resin garnish 7 is elastically contacted and sealed.

  When the door is closed with the path indicated by the symbol M as the door entry path, the main seal lip 5 is elastically contacted with a part of the vehicle body panel 8 forming the door opening edge on the vehicle body side as a seal surface, The auxiliary seal lip 6 is brought into elastic contact with the garnish 7 at the front edge of the rear side window glass 2 to seal the inside and outside of the vehicle interior in the form of a so-called double seal structure.

  Here, the door weather strip 4 itself is the same as that of the conventional structure shown in FIG. 4, whereas the garnish 7 attached to the front edge of the rear side window glass 2 is an auxiliary seal lip on the door weather strip 4 side. 6 is a portion of the seal surface 7a of the garnish 7 that functions as a seal surface. A minute projection 11 is formed which will be elastically contacted.

  That is, the garnish 7 has a substantially L-shaped cross section attached to the front end edge of the rear side window glass 2, but a semicircular cross section is provided on the seal surface 7a of the bent piece 17 with which the auxiliary seal lip 6 is elastically contacted. The protruding portion 11 is formed in a bead shape along the longitudinal direction. 1B, when the auxiliary seal lip 6 overstrokes together with the rear door 1 when the door is closed, the tip of the auxiliary seal lip 6 has a minimal area at the overstroke position P1. The auxiliary seal lip 6 is slightly restored from the overstroke position P1 to the door opening direction and is stationary at the normal seal position P2 which is the door closing position, although it is preferably elastically contacted so that it rides in a line contact state. In this case, the position is set so as not to contact the auxiliary seal lip 6. The cross-sectional shape of the protrusion 11 is not particularly limited as long as the contact area between the auxiliary seal lip 6 and the seal surface 7a can be minimized.

  Here, in order to further improve the sliding of the auxiliary seal lip 6 with respect to the garnish 7, it is desirable to apply silicone to the surface of the auxiliary seal lip 6 as in the prior art, but the application amount is extremely small. It is not necessary to strictly control the coating amount as in the conventional case. Further, when the behavior of the auxiliary seal lip 6 is stabilized, the application of the silicone is not necessarily required.

  Therefore, according to the seal structure configured as described above, when the rear door 1 is closed as shown in FIG. 1A, the main seal lip 5 of the door weather strip 4 is not attached to the vehicle body panel as described above. The auxiliary seal lip 6 is elastically contacted with the sealing surface 7a of the garnish 7 and is bent and deformed to seal the outside of the vehicle interior in the form of a so-called double seal structure. .

  In this case, the rear door 1 slightly overstrokes the original closed position, and accordingly, the auxiliary seal lip 6 of the door weather strip 4 also slightly overstrokes, as shown in FIG. As a result, the front end of 6 climbs onto the protrusion 11 with line contact, and a predetermined gap is secured between the seal surface 7 a of the garnish 7 and the auxiliary seal lip 6.

  Thereafter, the rear door 1 is slightly restored from the overstroke position to the outside of the passenger compartment due to the reaction force of the main seal lip 5 and the like, and comes to rest at the original door closing position. At this time, since the auxiliary seal lip 6 is only in contact with the protrusion 11 on the garnish 7 side with a line contact or a minimal area, the auxiliary seal lip 6 also follows the movement of the rear door 1 to the protrusion 11. On the other hand, it is displaced in the door opening direction from the overstroke position P1 of FIG. 1B while causing a slip, and is displaced to the normal seal position P2, which is the original stationary position, and is stationary.

  As described above, the distal end portion of the auxiliary seal lip 6 is also displaced from the overstroke position P1 to the normal seal position P2 in accordance with the restoring displacement of the rear door 1 in the door opening direction, so that the state shown in FIG. Thus, the auxiliary seal lip 6 is not excessively deformed. In addition, as long as the auxiliary seal lip 6 is at the regular seal position P2, a sufficient contact area is secured with the seal surface 7a on the garnish 7 side, so that the original sealing performance can be maintained over a long period of time.

  In addition, regardless of whether the auxiliary seal lip 6 is in the overstroke position P1 or the regular seal position P2, the front end side is always set to the garnish 7 rather than the notch portion 10 that is the bent position of the auxiliary seal lip 6 when the door is closed. Since it is made to elastically contact and function as a seal surface, excessive deformation on the base side of the auxiliary seal lip 6 as in the prior art can be prevented in advance, and inversion of the auxiliary seal lip 6 can be prevented. It works effectively.

  Therefore, when the rear door 1 is opened from the state shown in FIG. 1B, the auxiliary seal lip 6 does not reverse, and the resistance at the time of opening the door does not increase so much. No longer makes an unusual noise.

  FIG. 2 shows a second embodiment of the present invention and shows an enlarged view of the main part of the garnish 7 described above.

  In the first embodiment, the protrusion 11 set on the sealing surface 7a of the bent piece 17 of the garnish 7 is formed as a single bead-like one continuous along the longitudinal direction. In this second embodiment, a plurality of protrusions 21, 21,... That are discontinuous in the longitudinal direction and have independent semicircular cross sections are arranged in parallel along the longitudinal direction.

  According to the second embodiment, when the auxiliary seal lip 6 rides on the protrusions 21, 21... During the so-called overstroke similar to FIG. 1B (at this time, the protrusions 21, 21... The auxiliary seal lip 6 is in a non-contact state with the garnish 7 in a portion where there is no contact), the contact area between the two can be further reduced, the behavior of the auxiliary seal lip 6 is further stabilized, and the protrusions 21, The slipping of the auxiliary seal lip 6 with respect to 21... Can be prevented and the catch can be prevented in advance, and the opening and closing operation of the rear door 1 can be performed more smoothly.

It is a figure which shows 1st Embodiment of the seal structure which concerns on this invention, (A) is an expanded sectional view at the time of the door closing of the site | part equivalent to the cross section along the AA line of FIG. 3, (B) is the figure. The principal part expanded sectional view at the time of what is called an overstroke just before reaching the state of (A). The figure which shows 1st Embodiment of the seal structure which concerns on this invention, and is a principal part expansion perspective view of the same garnish as FIG. The rear perspective view of a 4-door type automobile. It is a figure which shows an example of the conventional seal structure, and is an expanded sectional view which follows the AA line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Rear door 2 ... Rear side window glass 3 ... Door sash 4 ... Door weather strip 5 ... Main seal lip 6 ... Auxiliary seal lip 7 ... Garnish (edge decoration member)
7a ... Sealing surface 8 ... Body panel 11 ... Projection 17 ... Bending piece 21 ... Projection P1 ... Overstroke position P2 ... Door closing position (regular seal position)

Claims (5)

A door weather strip having a seal lip is attached to the periphery of the door of an automobile, and the seal lip is elastically applied to an edge decoration member on the rear side window glass side at a portion that will face at least the front end of the rear side window glass when the door is closed. In the door seal structure for automobiles that is in contact with and sealed,
An automotive door characterized in that a protrusion that can contact the seal lip with a minimal area is formed on the interior side of the vehicle interior from the portion of the edge decoration member that is elastically contacted by the seal lip when the door is closed and functions as a seal surface. Seal structure.   The automobile door seal structure according to claim 1, wherein a plurality of discontinuous and independent protrusions are formed along the longitudinal direction of the seal surface of the edge decoration member. The seal lip extends from the mounting base portion of the door weather strip and is bent at the substantially central portion in the extending direction so that the tip end side is inclined toward the outside of the passenger compartment in a free state. And
3. The door structure for an automobile door according to claim 1, wherein when the door is closed, the front end side of the bent position is elastically contacted with an edge decoration member so as to function as a sealing surface.   The said door decoration member is the resin-made garnish with which the front end edge of the rear side window glass was mounted | worn, The sealing structure of the door for motor vehicles in any one of Claims 1-3 characterized by the above-mentioned. The door weather strip is provided with a tongue-shaped auxiliary seal lip located outside the vehicle interior of the main seal lip separately from the hollow main seal lip,
When the door is closed, the main seal lip is elastically brought into contact with the opening edge on the vehicle body side, and the auxiliary seal lip is elastically brought into contact with the garnish located outside the vehicle compartment side of the opening edge on the vehicle body side. The sealing structure for an automobile door according to claim 4.

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