JP3490935B2 - Lower sash for car doors - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower sash for an automobile door fixedly installed in a door main body of the automobile to guide the up and down movement of a door glass, and more particularly to a lower sash formed entirely of a resin material.

[0002]

2. Description of the Related Art As shown in FIG. 7, a lower sash 2 for fixedly guiding the front and rear edges of a door glass 1 in a vertically slidable manner is fixedly installed inside a door body of an automobile. In recent years, the lower sash 2 has been made of a hard resin material from the viewpoints of weight reduction, manufacturing cost reduction, and the like.

By the way, in this kind of lower sash, it is necessary to guide the door glass to the upper door sash and the door opening of the vehicle body in a track as accurate as possible. However, there are variations in the installation of the door glass and the lower sash itself. Since it cannot be completely zero, some fluctuation of the door glass must be allowed in order to ensure smooth operation of the door glass. However, at this time, if there is a gap between the lower sash and the door glass, rattling may occur when the door glass is moved up and down, etc. Therefore, in this type of lower sash, fluctuation of the door glass is allowed and rattling is prevented. We must resolve conflicting problems.

As a technique for coping with this, a conventional technique is disclosed in, for example, Japanese Patent Application Laid-Open Nos. 9-100676 and 9-15637.
Those described in Japanese Patent Publication No. 3 and Japanese Patent Publication No. 9-240279, etc. have been devised.

In these techniques, as shown in FIGS. 7 to 9, a plurality of elastic claw portions 5 are provided on the opposing side walls 4 and 4 of the lower sash body 3 so as to be spaced apart in the longitudinal direction. By elastically holding the side surface of the end portion by these claw portions 5, it is possible to both allow the fluctuation of the door glass 1 and prevent rattling.

[0006]

However, in this conventional lower sash, a plurality of claw portions 5 for holding the door glass 1 are provided on the side walls 4, 4 of the lower sash body 3 along the longitudinal direction. Therefore, when the door glass 1 is moved up and down and the glass 1 deviates from the specified track, the lower end portion of the glass 1 is claw portion 5 as shown in FIG.
This causes a problem that a striking sound is generated at this time.

As a technique for reducing this sliding noise, for example, as disclosed in Japanese Patent Application Laid-Open No. 9-123763, a resin lower sash main body is provided with a rubber glass run separate from the main body. It has also been proposed that this glass run continuously and elastically holds the end portion of the door glass in the longitudinal direction by this glass run, but this type of lower sash is preferable from the viewpoint of reducing the number of parts and manufacturing cost. However, improvement of this point is desired.

Therefore, the present invention is capable of both allowing the fluctuation of the door glass and preventing rattling, and furthermore, without causing a rise in the manufacturing cost due to an increase in the number of parts, the rubbing when the door glass is raised and lowered. It is intended to provide a lower sash for an automobile door that can eliminate noise.

[0009]

As a means for solving the above-mentioned problems, the invention according to claim 1 holds the front and rear edges of the door glass in the door body slidably in the vertical direction. A lower sash main body having a U-shaped cross section, and a bracket for fixing the lower sash main body to the door main body integrally formed of a resin material. The thickness is set to be equal to or less than the thickness, and a spring structure portion that allows the displacement of the lower sash body is integrally provided on the bracket.

In the case of the present invention, since the distance between both side walls of the lower sash body is less than the thickness of the door glass, rattling does not occur between the lower sash body and the door glass, and the door glass slightly fluctuates. Is allowed by the spring structure of the bracket.

According to a second aspect of the present invention, in the first aspect of the invention, a guide ridge is formed on at least one of both side walls of the lower sash body along the longitudinal direction so as to be in sliding contact with the side surface of the end portion of the door glass. Then, the distance between the both side walls is made smaller than the thickness of the door glass by this guide ridge.

In the case of the present invention, since the side wall of the lower sash body is in contact with the side surface of the end portion of the door glass via the guide ridge, even if the distance between both side walls is set smaller than the thickness of the door glass, the door glass is set. Sliding resistance does not increase significantly.

According to a third aspect of the invention, in the first or second aspect of the invention, the spring structure portion is constituted by a continuously curved plate-like piece.

In the case of the present invention, the continuous bending of the plate-shaped piece allows the front-back and left-right fluctuations of the lower sash body.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Next, one embodiment of the present invention is shown in FIG.
~ It demonstrates based on FIG.

In the drawings, reference numeral 10 is a lower sash according to the present invention. The lower sash 10 has a cross-section which holds a front edge or a rear edge of a door glass slidably in a vertical direction in a door body of an automobile door. A character-shaped lower sash body 11 and a bracket 1 extending from the upper and lower ends of the lower sash body 11 for fixing the lower sash body 11 to an inner panel (not shown) of the door body.
2 and.

The lower sash 10 is wholly integrally formed by molding using a high-strength synthetic resin material such as ABS (acryl / butadiene / styrene) as a raw material. In the case of this embodiment, the lower sash body 11
As shown in FIG. 2, the side walls 13 and 14 facing each other have an interval L set to be the same as the thickness T of the door glass 15, and allow vertical sliding with respect to the end side surface of the door glass 15. However, it is possible to maintain close contact at all times.

Each of the upper and lower brackets 12 of the lower sash body 11 is composed of a plate-like piece 19 which is curved in a substantially S-shaped cross section from the base of the inner side wall 13 toward the inside of the vehicle. The tip portion of the character is formed to be thick in parallel with the lower sash, and an insert nut 17 for fixing the bracket 12 to the door body is embedded in the thick portion 16 thereof. The substantially S-shaped plate-like piece 19 of the bracket 12 constitutes a spring structure portion.
The lower sash body 11 is allowed to be displaced in the vehicle width direction and the vehicle body front-rear direction by elastic deformation using the two curved portions 18a and 18b as fulcrums.

Therefore, according to the lower sash 10, the rattling of the door glass 15 with respect to the lower sash body 11 is eliminated by setting the interval between both side walls 13 and 14 of the lower sash body 11 (the gap between the door glass 15 and the door glass 15 is zero). The fluctuation of the door glass 15 caused by the installation error of the door glass 15 and the lower sash 10 itself is caused by the bracket 1
The elasticity of the plate-shaped piece 19 having a substantially S-shaped cross section in FIG.

In the lower sash 10, the side walls 13 and 14 of the lower sash 10 are constantly in continuous contact with the end side surfaces of the door glass 15 in the longitudinal direction, so that the door glass 15 is slightly deviated from the specified track. Even if there is, the lower end of the door glass 15 does not collide with the side surface of the lower sash 10 when the door glass 15 is moved up and down. Therefore, there is no problem that a sliding sound is generated when the door glass 15 is moved up and down.

Further, in the case of this lower saturation 10,
Since the spring structure portion of the bracket 12 is configured by the plate-like piece 19 having an S-shaped cross section that extends toward the vehicle interior direction, the bracket 12 has an extremely simple shape, but the vehicle body width direction of the lower sash body 11 and the vehicle body It is possible to flexibly allow the variation in the front-back direction. The plate-like piece 19 has a relatively large S-shaped cross section and has no undercut, so that it can be easily integrally formed with the lower sash body 11 by a mold.

In this embodiment, the plate-like piece 19 constituting the bracket 12 is formed in a substantially S-shaped cross section, but this cross-sectional shape is W-shaped as long as it can have spring characteristics. Other shapes such as However, if it has a cross-sectional shape such as an S-shaped curve that is continuous, it can be elastically deformed flexibly in the front-rear direction and the left-right direction of the vehicle body, and it is also strong in strength and easily released during molding. can do.

FIG. 4 shows another embodiment of the present invention. A lower sash 20 of this embodiment is a protrusion along the longitudinal direction on the inner side surfaces of the side walls 13 and 14 of the lower sash body 11 on the tip side. The ridge 21 is formed so that the tip end of the ridge 21 is brought into contact with the end side surface of the door glass 15, and the distance L between the ridges 21 of the ridges 21 and 21 is set to the door glass 1.
The thickness T is set to be smaller than 5.

Therefore, in the case of the lower sash 20, the variation of the door glass 15 can be elastically permitted by the plate-like piece of the bracket having a substantially S-shaped cross section as in the embodiment shown in FIGS. Moreover, the end portions of the door glass 15 can be held more reliably without rattling between the tip portions of the narrow projections 21 and 21 with respect to the door glass 15, and moreover, the contact portion extends along the longitudinal direction. Since the door glass 15 is held by the ridges 21 continuous in a linear shape, the sliding resistance with respect to the door glass 15 can also be reduced.

The ridge 21 of the lower sash 20
Is not mainly intended to elastically hold the door glass 15 but is mainly intended to reduce sliding resistance. Therefore, the side wall 13 of the lower sash body 11,
14 It is not necessary to form a cantilever structure or the like by only partially bulging the inner surface side, and therefore the molding die need not be complicated. Therefore, the manufacturing cost is not significantly increased.

Here, an example in which the ridge 21 is formed on both side walls 13 and 14 of the lower sash body 11 has been described, but the ridge 21 may be provided only on one side of the side walls 13 and 14. .

FIGS. 1 to 3 show an embodiment in which the plate-like piece 19 of the bracket 12 is extended from the base portion of the lower sash main body 11 toward the passenger compartment in a substantially S-shape. As shown in FIGS. 5 and 6, the plate-like piece 29 of the bracket 12 may be extended in the vehicle front-rear direction. In this case, the variation of the door glass 15 in the vehicle front-rear direction can be allowed more smoothly, and in the case of the one shown in FIGS. Be tolerable.

[0028]

As described above, the invention described in claim 1 is
The distance between the opposite side walls of the lower sash body is set to be equal to or less than the thickness of the door glass, and the bracket is integrally provided with a spring structure that allows displacement of the lower sash body. It is possible to eliminate rattling by setting the distance between the side walls of the lower sash body, and to allow fluctuations in the door glass by the spring structure part of the bracket.As a result, the manufacturing cost rises due to the increase in the number of parts and It is also possible to reliably prevent the generation of a rubbing sound when the door glass is moved up and down.

According to a second aspect of the present invention, in the invention according to the first aspect, a guide ridge is formed on at least one of both side walls of the lower sash body along the longitudinal direction so as to be in sliding contact with the end side surface of the door glass. However, since the distance between the both side walls is made narrower than the thickness of the door glass by this guide ridge, the rattling of the door glass is more reliably prevented without increasing the sliding resistance when the door glass is moved up and down. It becomes possible to do.

According to a third aspect of the invention, in the first or second aspect of the invention, since the spring structure portion is constituted by a continuously curved plate-like piece, it can be manufactured by molding or the like. Although it has an easy and simple shape, it is possible to reliably allow the front and rear and left and right movements of the door glass, and also the strength is increased. Therefore, according to the present invention, it is possible to guarantee the smooth operation of the door glass by absorbing the variation in the construction of each product without increasing the manufacturing cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1 showing the same embodiment.

FIG. 3 is a sectional view taken along line BB of FIG. 2 showing the same embodiment.

FIG. 4 is a sectional view corresponding to FIG. 3, showing another embodiment of the present invention.

FIG. 5 is a perspective view showing still another embodiment of the present invention.

FIG. 6 is a cross-sectional view taken along the line CC of FIG. 5 showing the same embodiment.

FIG. 7 is a side view of an automobile door.

FIG. 8 is a sectional view taken along the line D-D in FIG. 7 showing a conventional technique.

9 is a sectional view similar to FIG. 8 showing the same technique.

[Explanation of symbols]

10 ... lower sash 11 ... Lower sash body 12 ... Bracket 13, 14 ... Side wall 15 ... Door glass 19, 29 ... Plate-shaped piece (spring structure part)

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B60J 5/04 B60J 10/04

Claims (3)

(57) [Claims] 1. A lower sash body having a U-shaped cross section for holding the front and rear edges of the door glass in the door body in a vertically slidable manner, and a bracket for fixing the lower sash body to the door body. In the lower sash of the vehicle door integrally formed by the above, the gap between the opposite side walls of the lower sash body is set to be equal to or smaller than the thickness of the door glass, and the bracket allows the bracket to displace the lower sash body. A lower sash for automobile doors, which is characterized by an integrated structure. 2. A guide ridge is formed on at least one of both side walls of the lower sash body along the longitudinal direction so as to be in sliding contact with an end side surface of the door glass, and the distance between the both side walls is set by the guide ridge. The lower sash for an automobile door according to claim 1, wherein the lower sash is narrower than the thickness. 3. The spring structure portion is constituted by a continuously curved plate-shaped piece.
Lower sash for automobile doors described in.