GUIDE STRUCTURE FOR SLIDING WINDOW GLASS

Abstract: In a sliding window glass guide structure for an automo­ tive door or the like, the sliding window glass is configured in a curved cross-sectional shape having a predetermined radius of curvature and slidable with a predetermined sliding inclination angle. Means is provided for guiding the sliding window glass, when the latter is slid, while preventing the front and rear edges thereof from being deviated from predetermined sliding loci.

Description: BACKGROUND OF THE INVENTION FIELD OF THE INVENTION This invention relates to a guide structure for sliding window glass of an automotive door or the like, and more particularly it pertains to an improved guide structure for slidably supporting sliding window glass of a curved cross-section. DESCRIPTION OF THE PRIOR ART In order to have a better understanding of the present invention, reference will first be made to Figures 1 to 3 of the drawings, illustrating a conventional sashed rear door of a motor vehicle, wherein sliding window glass 1 is slidably supported by means of a window regulator 3 incorporated in a door body 2. Guide members G are provided by which the sliding window glass 1 is slidably retained at the front and rear edges thereof in such a manner as to be prevented from shaking when slid. The guide member G retaining the front edge of the sliding window glass 1 is comprised of a front leg portion 4f of an upper sash member 4 and a lower sash member 5 connected to the lower end of the front leg portion 4f. The other guide member G for retaining the rear edge of the sliding window glass 1 is comprised of a partition sash member 6 disposed in parallel relationship with the lower sash member 5. In Figures 1 to 3, indicated at 7 is fixed window glass inserted between and retained by the partition sash member 6 and rear leg portion 4r of the upper sash member 4; shown at 10 is a glass run attached to each guide member G and slidably holding the sliding window glass 1; and denoted at 11 is a weather strip for holding the fixed window glass 7. From a formative point of view as well as from the standpoint of aerodynamics or in view of the demand that the vehicle compartment space be made as large as possible, it is the recent trend that the sliding window glass 1 is configured in a curved cross-sectional shape with a radius of curvature R. Thus, the guide members for holding the sliding window glass 1 of such a shape are also configured in a curved cross-sectional shape having a radius of curvature equal to the radius of cruvature R of the sliding window glass 1, as shown in Figure 2. Some formative specifications require that the sliding window glass 1 be slidable at a predetermined angle 0, less than a right angle, with respect to a horizontal: line 8 as shown in Figures 1 and 4. It has heretofore been the usual practice that the front and rear edges of the sliding window glass 1 are configured in the form of end faces 9f and 9r inclined relative to the horizontal line 8 with an angle equal to the aforementioned sliding inclination angle of the sliding window glass 1, and that the guide members G are disposed along straight lines lf and lr (see Figure 4) inclined with respect to the horizontal line 8. With the aforementioned conventional sliding window glass guide structure, in the case where the sliding inclination angle 6 of the sliding window glass 1 is close to a right angle, the sliding window glass 1 is slid following slide loci along the guide loci of the guide members G as viewed sidewise; as the sliding inclination angle e of the sliding window glass 1 decreases, however, the sliding loci of the sliding window glass 1 are deviated from the guide loci lf and or of the guide members G as shown by two-dot chain lines in Figure 4. This causes the relationship in relative position between the sliding window glass 1 and the guide members G to be nonuniform so that there is -the tendency that gaps occur between the sliding window glass 1 and the glass runs and/or the window glass 1 bites into the glass runs 10. Obviously, such tendency leads to an astable retainment of the sliding window glass 1 by the guide members G, as a result of which the sliding window glass 1 turns out shaky or, in a worse case, unable to be slid. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a novel and improved sliding window glass guide structure which is so designed as to positively hold the sliding window glass which is of a curved cross-sectional shape and obliquely slid, thereby effectively avoiding the aforementioned problems with the prior art. Briefly stated, the structure according to the present invention is provided with sliding window glass guide members which are respectively configured in compliance with the sliding loci of the sliding window glass. More specifically, the guide members are shaped in the form of helixes extending along a cylindrical surface of a radius of curvature equal to that of the sliding window glass and with a helical angle equal to the sliding inclination angle of the sliding window glass. Other objects, features and advantages of the present invention will become apparent from the en; suing description taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a view showing a conventional automotive door assembly with the inner panel thereof removed, as viewed from the vehicle compartment side. Figures 2 and 3 are sectional views taken along the lines II-II and III-III of Figure 1, respectively. Figure 4 is a view illustrating the relationship between the sliding loci of sliding window glass and the guide loci of conventional guide members. Figure 5 is a view, similar to Figure 1, showing the sliding window glass guide structure according to an embodiment of the present invention. Figure 6 is a view illustrating the slide loci of the sliding window glass shown in Figure 5. Figures 7 and 8 are views, similar to Figure 5, showing the sliding window glass guide structure according to a second and a third embodiment of the present invention, respectively. Figure 9 is a sectional view taken along the line IX-IX of Figure 8. Figure 10 is a view, similar to Figure 5, showing the sliding window glass guide structure according to a fourth embodiment of the present invention. DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to Figures 5 and 6, there is shown the sliding window glass guide structure according to a first embodiment of the present invention, wherein the present invention is applied to an automotive sashed rear door including sliding window glass 1 and fixed window glass 7. In this embodiment, the sliding window glass 1 is configured in a curved cross-sectional shape with a predetermined radius of curvature R, and provided, at the front and rear edges thereof, with end faces 9f and 9r each of which is shaped in the form of a helix and inclined, with respect to a horizontal line 8, through an angle equal to the sliding inclination angle e of the sliding window glass.l. Furthermore, guide members G are provided which are adapted to slidably retain the sliding window glass 1 at the front and rear edges thereof. The guide members G are comprised of a front leg portion 4f of an upper sash member 4, a lower sash member 5, and a partition sash member 6, and thus similar to those of Figure 1 in this respect. In this embodiment, however, it is to be particularly noted that the guide members G are configured in compliance with the slide loci of the sliding window glass 1. More specifically, as shown in Figure 6, the sliding window glass 1 is slid, along the circumferential surface of a notional cylinder 20 having a radius of curvature R, from the uppermost position abcd to the lowermost position a'b'cld', so that the front edge ab and rear edge cd of the sliding window glass 1 are moved, along helixes Sf and Sr each having a helical angle equal to the aforementioned sliding inclination angle 0. Thus, the front and rear guide members G are configured in correspondence to the helixes Sf and Sr mentioned above, respectively. In this embodiment, use is made of a window regulator 3 which is arranged to support the sliding window glass 1 by means of x type arms 21. With the sliding window glass support structure according to this embodiment, it is possible to maintain a fixed relationship in relative position between the sliding window glass 1 and the guide members G when the sliding window glass 1 is slid, thus precluding the tendency that gaps occur between the sliding window glass 1 and glass runs 10 (see Figure 3) of the guide members G and/or the sliding window glass 1 bites into the glass runs 10. In this way, the sliding window glass 1 is positively retained by the guide members G so that the.possibility is completely precluded that the sliding window glass 1, when slid, turns out shaky and/or is hindered from the sliding movement. Referring to Figure 7, there is shown the sliding window glass support structure according to a second embodiment of the present invention. In this embodiment, the present invention is applied to an automotive sashed front door wherein sliding window glass 1 is configured in a curved cross-sectional shape with a radius of curvature R as in the aforementioned first embodiment. Unlike in the first embodiment, however, the front edge of the sliding window glass 1 is shaped in the form of a forwardly inclined end face 9f' for the purpose of securing a side sight, while the rear edge of the sliding window glass 1 is configured in the form of an end face 9r inclined with an angle equal to the sliding inclination angle e of the sliding window glass 1. Furthermore, the bottom end of the front edge of the sliding window glass 1 is formed as an end face 9f which is parallel to the rear end face 9r. The sliding window glass 1 is slidably retained, at its front edge or end face 9f, by a guide member G which is constituted by the bottom end of a front leg portion 4f of an upper sash member 4 and a front lower sash member 5, and, at its rear edge or end face 9r, by another guide member G which comprises a rear leg portion 4r of the upper sash member 4 and a rear lower sash member 5r coupled to the bottom end of the rear leg portion 4r. These guide members are similar in construction to those of the aforementioned first embodiment. The front leg portion 4f of the upper sash member, except for its bottom end, retains the front edge of the sliding window glass 1 when the latter assumes its uppermost position, while it retains no part of the sliding window glass 1 when the latter is slid,. thus, the front leg portion 4f, except for the bottom end thereof, is configured in a rectilinear form as viewed sidewise. Referring to Figures 8 and 9, there is shown the sliding window glass guide structure according to a third embodiment of the present invention, wherein the present invention is applied to an automotive sashed rear door. As will be seen, this embodiment is different from the first embodiment in that the sliding window glass 1 is provided, only at the front edge thereof, with an end face 9f inclined through an angle equal to the sliding inclination angle e of the sliding window glass 1 and, at the rear edge thereof, with an end face 9r' which is non-parallel with the end face 9r of the front edge mentioned above. The sliding window glass 1 is slidably retained, at the front edge thereof, by a guide member G which is constituted by à front leg portion 4f of an upper sash member 4 and a lower sash member 5, and, at the rear edge thereof, by another guide member G which is formed by a guide rail provided in the door body 2 and disposed in sliding engagement with a roller 24 secured to the sliding window glass 1 at a rear portion of the bottom edge thereof. These guide members G are similar in construction to those of the first embodiment. A partition sash member 6, which retains the sliding window glass 1 at the rear edge thereof, does not serve as a guide member for the sliding window glass 1, since it retains no part of the sliding window glass 1 when the latter is slid. In this embodiment, there is provided a window regulator 3 which is so designed as to enable the sliding window glass 1 to be slid by means of a single arm 26. Referring to Figure 10, there is illustrated the sliding window glass guide structure according to a fourth embodiment of the present invention, wherein the present invention is applied to an automotive sashless door. In this embodiment, rollers 24f and 24r are mounted, through back plates 23f and 23r, at front and rear portions of the bottom edge of sliding window glass 1 supported by means of a window regulator 3. Provided in the door body 2 are guide rails 25f and 25r adapted to serve as guide members G. The rollers 24f and 24r are disposed in sliding engagement'with the guide rails 25f and 25r, respectively. The guide members G of this embodiment are similar in construction to those of the first embodiment except that the construction thereof is determined on the basis of the sliding inclination angle o of the sliding window glass 1, irrespective of front and rear end faces 9f and 9r of the sliding window glass 1. Although in each of the above-described embodiments, the present invention was applied to an automotive door, it is not limited thereto but equally applicable to a sliding type side window or the like. As will be appreciated from the foregoing discussion, with the sliding window glass guide structure according to the present invention, it is possible to make the slide loci of the sliding window glass and the guide loci of the guide members completely conform to each other so that a positive retainment of the sliding window glass by the guide members can be achieved, by virtue of the fact that each of the guide members is configured in the form of a helix extending along the circumferential surface of a notional cylinder having a predetermined radius of curvature equal to the radius of curvature the sliding window glass. While the present invention has been described and illustrated with respect to specific embodiments thereof, it is to be understood that the present invention is by no means limited thereto but covers all changes and modifications which will become possible within the scope of the appended claims.

Claims: What is claimed is: 1. A sliding window glass guide structure for an automotive door or the like, wherein the sliding window glass is configured in a curved cross-sectional shape having a predetermined radius of curvature and slidable with a predetermined sliding inclination angle, said structure comprising: guide means constituted by a front and a rear guide member which are disposed in spaced relationship with each other and associated with said sliding window glass in such a manner as to guide said sliding window glass, when the latter is slid, while preventing the front and rear edges of said sliding window glass from being deviated from predetermined sliding loci. 2. A sliding window glass guide structure according to claim 1, wherein: the front and rear edges of said sliding window glass are respectively configured in the form of a front and a rear end face each of which is inclined, with respect to a horizontal line, with said predetermined angle substantially equal to said sliding inclination angle of said sliding window glass; and said front and rear guide members are configured in the form of helixes extending along the circumferential surface of a notional cylinder having a radius of curvature substantially equal to said radius of curvature of said sliding window glass and being inclined through an angle substantially equal to said sliding inclination angle of said sliding window glass. 3. A sliding window glass guide structure according to claim 2, wherein said front guide member is formed by a front leg portion of an upper sash member and a lower sash member connected to the bottom end of said front leg portion, and said rear guide member is constituted by a partition sash member extending downwardly from said upper sash member in spaced relationship with said front guide member. 4. A sliding window glass guide structure according to claim 1, wherein: the rear edge of said sliding window glass is configured in the form of an end face inclined through an angle substantially equal to said sliding inclination angle of said sliding window glass; the front edge of said sliding window glass is shaped in the form of a forwardly inclined end face provided with a lower end face portion extending substantially in parallel with said forwardly inclined end face; -said front and rear guide members are configured in the form of helixes extending along the circumferential surface of a notional cylinder having a radius of-curvature substantially equal to said radius of curvature of said sliding window glass and being inclined through an angle substantially equal to said sliding inclination angle of said sliding window glass; and said front guide memeber is arranged to slidably retain said sliding window glass only at said lower end face portion thereof when said sliding window. glass is slid. 5. A sliding window glass guide structure according to claim 4, wherein said front guide member is formed by a forwardly inclined front leg portion of an upper sash member, and a front lower sash member connected to said:front leg portion; and said rear guide member is constituted by a rear leg portion of said upper sash member, and a rear lower sash member connected to said rear leg portion 6. A sliding window glass guide structure according to claim 1, wherein: the front edge of said sliding window is configured in the form of a front end face inclined through an angle substantially equal to said sliding inclination angle of said sliding window glass; the rear edge of said sliding window glass is configured in the form of a backwardly inclined end face; said front and rear guide members are configured in the form of helixes extending along the circumferential surface of a notional cylinder having a radius of curvature substantially equal to said radius of curvature of said sliding window glass; and said front guide member is inclined through an angle substantially equal to said sliding inclination angle of said sliding window glass. 7. A sliding window glass guide structure according to claim 6, wherein said first guide member is formed by a front leg portion of an upper sash member and a lower sash member connected to said front leg portion, and said rear guide member is constituted by a guide rail with which is slidably engaged a roller attached to said sliding window glass. 8. A sliding window glass guide structure according to claim 1, comprising; a front and a rear guide rail constituting said front and rear guide members respectively; and a front and a rear roller attached, in spaced relationship with each other, to said sliding window glass at the bottom edge thereof, said front and rear rollers being disposed in sliding engagement with said front and rear guide rails respectively.

Inventors: MIURA, EIICHI, MIYAMOTO, KEN
Applicants: NISSAN MOTOR CO., LTD.
Application year: 1983
Main classification: B60J1
IPC codes: B60J10, E05F11, B60J1, E05D15