FOLDING CONVERTIBLE TOP WITH INTEGRAL BOOT

Abstract: A pair of side linkages for raising a convertible top (10) between a raised position, covering the vehicle body passenger compartment, through a body opening, and a lowered position folded into a storage compartment within the vehicle body, said top including a header (12) for engaging the vehicle windshield in the top raised position and at least one crossbow (14) extending between the side linkages, each linkage comprising side rails (18, 22) pivoted to and extending rearwardly from the header, and a plurality of links (34, 50, 56, 62) forming 4-bar linkages connecting the header (12), side rails (18, 22) and vehicle body for folding the top (10) in a Z-shaped folding action to a compact shape in the storage compartment such that the header (12) is not inverted and covers the folded top (10) and closes the body opening.

Description: FOLDING CONVERTIBLE TOP WITH INTEGRAL BOOT TECHNICAL FIELD This invention relates to vehicle convertible tops and, more particularly, to a top having a linkage which folds a top so that the header serves as a boot to cover the top when stored. BACKGROUND OF THE INVENTION Many different types of folding convertible soft and hard tops have been developed to enhance motoring pleasure by enabling a driver to selectively open and close the passenger compartment. These tops utilize a variety of different folding linkages, each of which are designed to accommodate the particular mechanical constraints of a specific vehicle application. It is desirable to utilize a top folding linkage that is simple, compact and stores the top in as little space as possible. When these tops are lowered into a storage compartment, the header is normally inverted. This requires that the top or a portion of the top to be covered by a soft or hard boot to prevent accumulation of dust or other contaminants that would be dumped into the passenger compartment when the header rotates as the top is raised. The boot may be manually installed, or, is automatically manipulated by power operators, usually hydraulic cylinders. Installation of these boots requires time and/or effort to install. In the case of the soft boot, it requires separate storage when removed to enable the top to be raised. It would be desirable to provide a convertible top that does not require a separate boot to close the top storage compartment, and incorporates a linkage, which stores the top in a compact configuration, with the outer surface of the header covering the remainder of the stored and folded top. SUMMARY OF THE INVENTION It is therefore an object of this invention to provide a convertible top that does not require a separate boot to close the top storage compartment, and incorporates a linkage, which stores the top in a compact configuration, with the exterior of the header covering the remainder of the stored and folded top. Accordingly, this invention features a convertible top and a pair of side linkages for raising the top between a raised position, covering the vehicle body passenger compartment, through a body opening, and a lowered position folded into a storage compartment within the vehicle body. The top includes a cover, a header for engaging the vehicle windshield in top raised position, and at least one crossbow extending between the side linkages to support the cover in top raised position. Each side linkage includes a side rail pivoted to and extending rearwardly from the header and other links for folding the top in a Z- shaped folding action to a compact shape in the storage compartment such that the header is not inverted and covers the folded top and closes the body opening. This invention also features 4-bar side linkages that enable the top to fold in the Z-shape. Another feature of this invention is the use of a lost-motion connection between the header and a side rail to enable relative lateral movement during raising and lowering of the top. These and other objects and features of this invention will become more readily apparent upon reference to the following detailed description of a preferred embodiment, as illustrated in the accompanying drawings, in which: BRIEF DESCRIPTION OF THE DRAWINGS Figs. 1 , 2, 3 and 4 are side views of a convertible top of this invention, sequentially shown in fully raised, Z A raised, half raised, and fully lowered and stored position; Fig. 5 is a perspective view of the top in its Fig. 3 position; Fig. 6 an enlarged bottom detail view of the juncture of the header and the front side rail; and Fig. 7 is an enlarged bottom view of a portion of Fig. 6, illustrating the flexible connection between the front side rail and the header. DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings, a convertible top 10 has a conventional flexible fabric, or other similar material, cover (not illustrated) that is supported at its front by a plate-like extended header, or 1-bow, 12, and an intermediate bow 14. The cover for top 10 is conventionally attached to the vehicle body (not illustrated). Header 12 extends sufficiently rearward so as to incorporate what would normally be an intermediate 2-bow. These supporting bows are pivotally connected at each side by an articulated linkage, which is conventionally operable by hydraulic cylinders, or other means (not shown) to raise and lower the top between an extended raised position covering the vehicle passenger compartment (not illustrated), as shown in Fig. 1 , through the intermediate positions shown in Figs. 2, 3 and 5, and a lowered and folded position, as shown in Fig. 4, within a storage compartment in a vehicle body (not illustrated). Only one articulated side linkage is illustrated, since both are identical/symmetrical. The linkages comprise a front rail 16 that is secured to, and moves with header 12. A middle rail 18 has a forward extension 20 that is connected to front rail 16, as will be later described. A rear rail 22 is pivoted adjacent its lower end at 24 to the rod 26 of a hydraulic cylinder 28, which is pivoted at 30 to a body-mounted mounting bracket 32. A lower control arm 34 is pivoted to bracket 32 at 36 and has an arm 38 that pivotally mounts one end 40 of a lower connecting link 42 that is pivoted at its other end 44 to the lower end 46 of rear rail 22. The upper end of lower control arm 34 is pivoted at 48 intermediate the ends of a middle connecting link 50 that has one end pivoted at 52 to middle rail 18 and its other end pivoted at 54 to an intermediate portion of rear rail 22. The upper end of an upper connecting link 56 is pivoted at 58 to an intermediate portion of middle side rail 18, while its other end is pivoted to the upper end of rear rail 22 at 60. An upper control arm 62 is pivoted at 64 to a header-mounted bracket 66, and to an intermediate portion of upper connecting link 56 at 68. The linkage just described, of course, is duplicated on the other side of the vehicle. It comprises three four-bar linkages that allow the top 10 to fold into a very compact, layered arrangement. As can be seen from viewing the folding sequence illustrated in Figs. 1, 2, 3 and 4, top 10 folds into the form of a collapsed "Z". This is enabled by employing the four-bar linkages. The first linkage is formed by header 12, front rail 20, upper control arm 62 and the upper portion of upper connecting link 56, as defined by pivots 64, 68, 58 and the connection 70 between extension 20 of middle rail 18 and front rail 16. The second four-bar linkage comprises upper connecting link 56, the lower portion of middle rail 18, middle connecting link 50 and the upper portion of rear rail 22, as defined by pivots 58, 52, 54 and 60. The third four-bar linkage is formed by the lower portion of middle connecting link 50, lower control arm 34, lower connecting link 42 and the lower portion of rear rail 22, as defined by pivots 48, 40, 44 and 54. Thus, the entire top 10 moves about body linkage pivot 36 and cylinder pivot 30, as controlled by cylinder 28 and the three four-bar linkages described above. This Z-fold provides a more compact arrangement requiring less space within the vehicle body than prior arrangements, while also enabling the extended header to cover the folded top and eliminate the necessity of using a separate boot cover. To enable this linear Z-type folding movement of top 10, accomiηodation must be made for lateral movement of the side linkage relative to the header. The mechanism 70 for enabling this lateral flexibility is shown in Figs. 6 and 7. Middle rail extension 20 is pivoted at 72 to one flange 74 of bracket 66. The other bracket flange contains an elongated slot 76, which receives a stud 78 mounted on a pad 80 on header 12. With this lost motion connection 70, middle rail 18, and the remainder of the side linkage, to pivotally move laterally of header 12, which is necessary to enable top 10 to fold in the above-described manner. While only a preferred embodiment has been described and shown, obvious modifications are contemplated within the scope of this invention, as defined by the following claims.

Claims: We claim: 1. A pair of side linkages for raising a convertible top between a raised position, covering the vehicle body passenger compartment, through a body opening, and a lowered position folded into a storage compartment within the vehicle body, said top including a header for engaging the vehicle windshield in top raised position and at least one crossbow extending between the side linkages, each linkage comprising side rails pivoted to and extending rearwardly from the header, and a plurality of links connecting the header, side rails and crossbows for folding the top in a Z-shaped folding action to a compact shape in the storage compartment such that the header is not inverted and covers the folded top and closes the body opening. 2. The linkages of claim 1 , each including a 4-bar linkage to accomplish the Z-shaped fold. 3. The linkages of claim 2, including a lost motion connection between a side rail and the header to enable relative lateral movement during folding and unfolding of the top. 4. The linkages of claim 1 , wherein each includes two 4-bar linkages to enable the Z-folding action. 5. The linkages of claim 4, wherein each includes three 4-bar linkages. 6. The linkages of claim 2, wherein each includes a first side rail mounted on the header, a second side rail pivoted to the header, a third side rail pivotally connected to the vehicle and spaced upper and middle connecting links interconnecting the second and third side rails to form the 4-bar linkage. 7. The linkages of claim 6, wherein each includes an upper control arm interconnecting the upper connecting link and the header to form a second 4-bar linkage. 8. The linkages of claim 7, wherein each includes a lower control arm connecting the middle connecting link and the vehicle body and a lower connecting link connecting an the third side rail and the lower control arm to form a third 4-bar linkage. 9. The linkages of claim 8, including a lost motion connection between the second side rail and the header to enable relative lateral movement during folding and unfolding of the top. each includes a first side rail mounted on the header, a second side rail pivoted to the header, a third side rail pivotally connected to the vehicle and spaced upper and middle connecting links interconnecting the second and third side rails to form the 4-bar linkage.

Inventors: HARRISON ALBERT W III, RAWLINGS STEPHEN P, HARRISON, ALBERT, W., III, RAWLINGS, STEPHEN, P.
Applicants: DURA CONVERTIBLE SYSTEMS INC, HARRISON ALBERT W III, RAWLINGS STEPHEN P, DURA CONVERTIBLE SYSTEMS INC., HARRISON, ALBERT, W., III, RAWLINGS, STEPHEN, P.
Application year: 2001
Main classification: B60J
IPC codes: B60J7