Mounting structure of wiper apparatus

Abstract: A wiper apparatus including right and left hand pivot shafts (2, 3) and a wiper motor (5) are incorporated into an integrated modular type holder member (H). A mounting section (2a) having a generally trapezoidal configuration is formed on a pivot holder to extend therefrom outwardly with respect to one of the pivot shafts. The wiper apparatus includes a trapezoidal insertion hole (13) on a vehicle body side. The mounting section (2a) is inserted loosely into the insertion hole (13) in a tilted orientation when the pivot holder takes a mounting position, and for mounting the wiper apparatus, using, as a lever, a supporting portion formed on the vehicle body side, the mounting section (2a) is pressed against an upper edge of the insertion hole (13) having a smaller dimension.

Description: 1. Field of Invention The invention relates to a mounting structure for a vehicle wiper (windshield wiper) apparatus for mounting to motor vehicles, such as cars, buses and trucks. 2. Description of Related Art Among vehicle wiper apparatus there is the modular type in which right and left hand pivot shafts to which right and left hand wiper arms are fitted and a wiper motor serving as a power source for placing these wiper arms into an oscillating or swinging motion are integrally built in a modular type holder member. In such a modular type wiper apparatus, the mounting or connection to a vehicle body is accomplished at three sections: right and left hand pivot holder sections and a motor holder section, as disclosed in JP-Y2-7-51953. Although the positions of the mountings of the right and left hand pivot holder sections to the vehicle body are provided at outer edge positions of a window or windshield (for example, at the driver side position), the mountings for the right and left hand pivot holder sections are outside the pivot shafts in the right and left directions to prevent interference with a link connecting the pivot shafts. It can be difficult for a fitter to hold such a wiper apparatus in place whilst he mounts the wiper apparatus using bolts at each of these three mounting locations. This mounting procedure has been simplified by the use of a central mounting structure that comprises a mounting bracket with an insertion hole to receive a mounting section carried by the wiper apparatus, rather than the usual mounting structure that requires the use of bolts. Once the wiper apparatus is mounted using this central mounting structure, the wiper apparatus will be held in place whilst the fitter mounts the apparatus at the other mounting locations with bolts, as disclosed in FR 2770880 A. In recent years, to enlarge the vehicle interior space and improve the passenger's comfort, the windshield is laid out forwardly in an offset way in the vehicle, thereby resulting in less space for mounting a wiper apparatus. Additionally, the mounting positions of the modular type wiper apparatus to the vehicle body are set so as not to interfere with the link, as mentioned above. While the mounting of the wiper apparatus to the vehicle body requires mounting seats on the vehicle body side, difficulty is experienced in laying out the positions of the mountings within a limited mounting space of the vehicle body. Additionally, the window glass of the motor vehicle tends to be widened in the right and left directions, which needs a wider wiping area (window wiping rate) accordingly. As the width of the window in the right and left directions increases, the projecting positions of the pivot shafts on the outer edge side of the window become further offset outwardly in the right and left directions of the vehicle body. Thus, on the outer edge side, not only is difficulty encountered in securing the mounting sections of the pivot holders to the vehicle body at the outsides of the pivot shaft positions in the right and left directions, but also, even if securable, the fixing of the mounting sections with bolts becomes difficult since the mounting sections are positioned at end portions of the vehicle body. SUMMARY OF THE INVENTION The invention has been developed in order to eliminate these problems in consideration of the above-described situations. In accordance with the invention, there is provided a mounting structure for a wiper apparatus comprising: first and second pivot shafts and a wiper motor incorporated into an integrated modular holder member; a mounting section carried by the holder member for mounting the holder member to a vehicle body, and a bracket for attachment to the vehicle body, the bracket including an insertion hole which can receive said mounting section loosely when said mounting section is inclined relative to a mounting position of said mounting section, characterised in that: the mounting section is formed to extend substantially axially from one side of said holder member; and a supporting portion-is-arranged on the side of the bracket from which the mounting section is inserted into said insertion hole; said supporting portion being so arranged and located that said mounting section, when it is moved from an inclined position to the mounting position, comes into contact with the supporting portion so that said-mounting section is clamped between said supporting portion and an upper edge portion of said insertion hole. Thus, according to the invention, for mounting a wiper apparatus to a vehicle body, there is no need to fix one pivot shaft side of the holder member with a bolt, but it is simply a matter of the insertion of the mounting section into the insertion hole, and the upper edge side of the mounting section moves to an upper edge portion of the insertion hole by using, as a supporting point of a lever, the mounting section coming into contact with the supporting portion when the mounting section is shifted from the tilted posture to the mounting posture, so that the mounting section can be supported in a state of being pressed against both the insertion hole and the supporting portion, thus achieving firm assembling. In addition, the insertion hole has a non-circular configuration and the side of the insertion hole against which the mounting section is pressed has a smaller dimension than the mounting section. Accordingly, the rotation of the mounting section is preventable, and since the insertion hole width reduces toward the upper edge side, the mounting section can be supported in a state of being cut or bitten thereinto, thereby preventing the occurrence of play. BRIEF DESCRIPTION OF THE DRAWINGS The object and features of the invention will become more readily apparent from the following detailed description of the preferred embodiment taken in conjunction with the accompanying drawings in which: Fig. 1 is a perspective view partially showing a wiper apparatus according to an embodiment of this invention; Fig. 2 is an exploded perspective view showing a pivot holder section; Fig. 3 is a cross-sectional view showing a mounting state of a pivot holder to a vehicle body; Fig. 4A is an illustration explaining dimensionally the state of insertion of a mounting section into an insertion hole; and Fig. 4B is an illustration explaining dimensionally the fixing of the mounting section to the insertion hole. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Referring to the drawings, a description will be given hereinbelow of an embodiment of the invention. A modular type wiper apparatus 1 includes right and left hand pivot holders 2, 3 which are installed integrally through a connecting pipe 4, and a motor holder 6, on which a wiper motor 5 is carried is fixedly secured to the connecting pipe 4 to constitute a modular type holder member H. A driving force of the wiper motor 5 is transmitted through a link member 7 to pivot shafts 8, 9 can respectively provided on the pivot holders 2, 3 so that the pivot shafts 8, 9 rotationally oscillate in conjunction with the drive of the wiper motor 5, thereby causing wiper arms (not shown) fixed to the pivot shafts 8, 9 to oscillate to conduct window surface wiping operations. It should be noted that the invention is not limited to employing the modular type holder member in which right and left hand pivot holders and a motor holder are integrated through the use of a connecting pipe, but is applicable to moulded-in types formed according to a pattern moulding technique. One pivot holder 2 (e.g., the driver side pivot holder) is fixedly set on an outer edge side of a window surface in the right and left directions. In the pivot holder 2, a mounting section 2a is formed to extend outwardly with respect to the position of the pivot shaft 8 in the right and left directions. The mounting section 2a has a bar-like or tube-like configuration whose upper surface side has a shorter edge to form a generally trapezoidal shape in cross section, and a rubber mount 10 made of a rubber elastic material is fitted over an outer periphery of the mounting section 2a. For the other pivot holder 3 and the motor holder 6, mounting portions or sections 3a, 6a are formed for bolt fixing. An insertion hole 13 for accepting the mounting section 2a is made in a vehicle body inner plate, or bracket, 12 fixedly secured to the vehicle body frame 11. Insertion hole 13 has a generally trapezoidal shape equivalent to that of the mounting section 2a, and has a dimension set so that the mounting section 2a (in this embodiment, the rubber mount 10 is fitted over it) can fit loosely therein. The length A of an upper edge or side 10a of the rubber mount 10 is set to be substantially equal to or slightly larger than the length X of an upper edge or side 13a of the insertion hole 13 (A ≥ X), while the length B of a lower edge 10b of the rubber mount 10 is set to be shorter than the length Y of a lower edge 13b of the insertion hole 13 (B < Y). The height C of the rubber mount 10 is set to be smaller than the height Z of the insertion hole 13 (C < Z). Each of the right and left hand edges of the rubber mount 10 is made to be substantially parallel with each of the right and left hand edges of the insertion hole 13. The mounting section 2a has a dimension set so that it can be loosely inserted into the insertion hole 13 in an orientation such that it is included or tilted relative to the upper edge 10a side with respect to the mounting position (a state indicated by a solid line in Fig. 3) of the holder member H into the vehicle body. A supporting portion 14 is formed by extending the vehicle body inner plate 12. This supporting portion 14 is installed on the lower edge 13b side of the insertion hole 13, but has a portion with a dimension set to be positioned above the lower surface of the rubber mount 10 when the mounting section 2a assumes its mounting position, and when the mounting section 2a inserted in the tilted orientation (shown in dash-dot line in Fig. 3) is set to the mounting position (shown in solid line in Fig. 3), the supporting portion 14 is brought into contact with the lower surface of the rubber mount 10, whereupon the mounting section 2a is pressed against the upper edge 13a side so that the lower side of the mounting section 2a is supported by the supporting portion 14 while the upper side of the mounting section 2a is supported by the upper edge 13a of the insertion hole 13. To attach the wiper apparatus 1 to the vehicle body, the mounting section 2a is first inserted into the insertion hole 13 in a state where the holder member H takes the tilted orientation, and the remaining mounting portions or sections 3a, 6a are then set with bolts while the holder member H is shifted to its mounting position. The mounting of the wiper apparatus 1 is achievable with only these operations. As described above, according to the invention, at the mounting of the wiper apparatus 1, there is no need to perform fixing of the pivot shaft 8 side of the holder member H with bolts; only the insertion of the mounting section 2a into the insertion hole 13 is needed to fix pivot staff side 8 of the holder member H. Additionally, as the holder member H is shifted from the tilted orientation to the mounting posture, the upper edge side of the mounting section 2a moves to the upper edge side of the insertion hole 13 using, as a supporting point of a lever, a portion of the holder member H coming into contact with the supporting portion 14, so that the mounting section 2a can be supported by the supporting portion 14 and the insertion hole 13, thus accomplishing firm and secure assembling. Since the insertion hole 13 and the mounting section 2a have a trapezoidal configuration, rotation of the mounting section 2a is prevented, and since the width of the insertion hole 13 becomes smaller toward its upper edge side, the upper edge 13a of the insertion hole 13 can cut or bite into the upper edge 10a of the rubber mount 10 of the mounting section 2a, thereby enabling tight attachment. This invention is not limited to the above-described embodiment. For example, the configurations of the mounting section and the insertion hole are not limited to a trapezoidal shape, but may also be non-circular shapes such as an ellipse or a polygon. These non-circular shapes can prevent the rotation of the mounting section, so that bolt fixing at only one place in the mount portion is required. Additionally, if these shapes are set such that the hole dimension on the side pressed by the supporting portion reduces gradually, the pressing becomes possible in a bitten or gripping manner, thereby preventing the occurrence of looseness or the like and accomplishing firmer supporting. Although in this embodiment the rubber mount 10 is fitted over the mounting section 2a, it is also possible to employ a structure with no rubber mount.

Claims: A mounting structure for a wiper apparatus (1) comprising: first and second pivot shafts (8,9) and a wiper motor (5) incorporated into an integrated modular holder member (H); a mounting section (2a) carried by the holder member (H) for mounting the holder member (H) to a vehicle body (11), and a bracket (12) for attachment to the vehicle body (11), the bracket (12) including an insertion hole (13) which can receive said mounting section (2a) loosely when said mounting section (2a) is inclined relative to a mounting position of said mounting section (2a), characterised in that : the mounting section (2a) is formed to extend substantially axially from one side of said holder member (H); and a supporting portion (14) is arranged on the side of the bracket (12) from which the mounting section (2a) is inserted into said insertion hole (13); said supporting portion (14) being so arranged and located that said mounting section (2a), when it is moved from an inclined position to the mounting position, comes into contact with the supporting portion (14) so that said mounting section (2a) is clamped between said supporting portion (14) and an upper edge portion of said insertion hole (13). A mounting structure for a wiper apparatus (1) according to claim 1, wherein said insertion hole (13) has a non-circular configuration. A mounting structure for a wiper apparatus (1) according to claim 1 or claim 2, wherein said insertion hole (13) is designed such that the insertion hole width reduces toward the upper edge side (13a) of the insertion hole (13). A mounting structure for a wiper apparatus (1) according to claim 1, claim 2 or claim 3, wherein said supporting portion (14) is integral with said bracket (12).

Inventors: ABE JUN, ABE, JUN
Applicants: MITSUBA CORP, MITSUBA CORPORATION
Application year: 1999
Main classification: B60S1
IPC codes: B60S1