JPH0421732Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a wiper device for a vehicle, and more particularly to a coupling device that connects these yoke members to each other in a wiper device having two or more yoke members such that these yoke members can pivot. .

[Prior Art] FIG. 6 shows an example of a conventional wiper device, in which yoke members 3 and 4 are pivotally connected to both ends of a yoke member 2 connected to a wiper arm 1 by pins 5 and 6, respectively. The blade rubber 7 is supported by the yoke members 3 and 4.
Usually the pins 5 and 6 are rivets.

Although a device disclosed in Japanese Patent Publication No. 55-8371 and other publications has been proposed as a connecting device that does not require riveting work, none has been widely put into practical use.

[Problems to be solved by the invention] The conventional type of connecting yoke members to each other by pins 5 and 6 requires riveting work;
Assembly time is required.

The device shown in Japanese Patent Publication No. 55-8371 requires bending the yoke member during assembly, and is not useful for reducing assembly costs.

In the specification of Utility Model Application No. 60-91158, the present applicant
A proposal has been made in which tapered portions are provided at both ends of the pivot pin and these taper portions engage with an elastic bearing portion to prevent the pivot pin from coming off, but there are problems with the material of the elastic bearing portion, manufacturing cost, etc.

An object of the present invention is to provide a yoke member connecting device that eliminates the drawbacks of these conventional devices.

[Means for Solving the Problems] According to the present invention, first and second yoke members each having a cross-sectional shape having substantially upright side walls and a top wall connecting the side walls are mutually connected. A pivoting coupling device having side walls that engage an inner surface of both side walls of a first yoke member and an outer surface of both side walls of a second yoke member, and a top wall that connects the side walls. The spacer member includes a spacer member made of resin and a pivot pin that extends through both side walls of the first and second yoke members and the spacer member, and the spacer member has a cylinder that projects inward from at least one side wall. The cylindrical portion of the spacer member has an outer diameter corresponding to the opening provided in the side wall of the second yoke member. The cylindrical portion has an inner diameter corresponding to the outer diameter of the pivot pin, and further includes an engaging portion at the inner end of the cylindrical portion that protrudes radially inward from the inner diameter for engaging with the intermediate small diameter portion of the pivot pin. A yoke member connecting device for a vehicle wiper is provided, which is provided with an axial notch that allows the diameter of a cylindrical portion to expand at an engaging portion position.

[Operation] Lateral escape of the pivot pin can be reliably prevented by the intermediate small diameter portion engaging with the engaging portion of the spacer member. By providing the notched groove, the intermediate small diameter portion of the pivot pin can be engaged with the engaging portion of the spacer member by simply pushing the pivot pin in the axial direction, thereby greatly simplifying the assembly work. Furthermore, the spacer member and the second yoke member can be assembled by simply deforming the spacer member elastically, and since the assembly of the first yoke member is completed, both yoke members will not be deformed. .

[Embodiment] Figures 1 to 3 show a first embodiment of the present invention, in which 10 is a first yoke member, 11 is a second yoke member, 12 is a spacer member, and 13 is a pivot pin. be. The yoke members 10 and 11 respectively correspond to the yoke members 2 and 3 in FIG. 6, but the present invention is not limited to the form shown in FIG.

The yoke member 10 has substantially upright side walls 10A,
10A, and a top wall 10B that connects the top end to both side walls 10A, 10A, and the yoke member 11 has a cross-sectional shape having substantially upright side walls 11A, 11A and a top wall 11B that connects the top ends of both side walls 11A, 11A.
It has a cross-sectional shape. In these cases, the connecting portions between the side walls and the top wall do not need to form an acute angle.

The spacer member 12 has both side walls 12A, 12A that engage with inner surfaces of both side walls 10A, 10A of the first yoke member 10 and engage with outer surfaces of both side walls 11A, 11A of the second yoke member 11, and wall 12
It is a synthetic resin member having a top wall 12B that connects A and 12A. In the illustrated embodiment, the top wall 12
B is in contact with the inner surface of the top wall 10B of the first yoke member 10 and is in contact with the inner surface of the top wall 11B of the second yoke member 11.
The spacer member 12 is spaced apart from the first yoke member 10 to direct relative rotational movement between the spacer member 12 and the first yoke member 10.
However, by providing an arcuate protrusion on the top wall 11B, the top wall 12 of the spacer member
The spacer member 1 may be brought into contact with the spacer member B.
2 is the first yoke member 1 together with the second yoke member
It may also be configured to rotate relative to 0.

Openings 10C, 10C of a size corresponding to the large diameter portion 13A of the pivot pin 13 are provided in both side walls 10A, 10A of the first yoke member, and openings 10C, 10C are provided in both side walls 11A, 11A of the second yoke member 11, which will be described later. Openings 11C, 11C corresponding to the outer diameter of the cylindrical portion 14 of the spacer member 12 are provided. The cylindrical portions 14, 14 of the spacer member 12 have both side walls 12A, 12A.
The pivot pins are integral with each other and protrude inward, that is, in a direction toward each other along the axis of the pivot pin. cylindrical part 14,
An engaging portion 15 that engages with the intermediate small diameter portion 13B of the pivot pin 13 is provided at the inner end of the pivot pin 14, and an axial notch groove 16 is provided at the inner end of the pivot pin 14 to enable the diameter of the cylindrical portion 14 to expand at the position of the engaging portion 15. (See Figure 3). A hole 12C corresponding to the large diameter portion 13A of the pivot pin 13 is provided in a portion of the cylindrical portion 14 where the engaging portion 15 is not provided and in the side wall 12A.

When assembling, first, the lower ends of the side walls 12A, 12A of the spacer member 12 are elastically deformed in the direction away from each other, and are placed over the second yoke member 11, and the cylindrical parts 14, 14 are inserted into the opening 1 of the yoke member 11.
Insert the cylindrical parts 14, 14 into 1C, 11C. Since there is no need to deform the yoke member 11, there is no need to perform work such as correction of painting. Next, the first
The pivot pin 13 is combined with the yoke member 10 of
All you have to do is press the button. The engaging portion 15 expands radially outward when the large diameter portion 13A of the pin 13 passes through it.
This is made possible by the presence of the cutout groove 16.
The assembly work is completed when the engaging portion 15 engages with the intermediate small diameter portion 13B.

FIG. 4 shows a modified example, in which one cylindrical portion 14A has an engaging portion 15' formed at its tip.
An engaging portion is not formed in the other cylindrical portion 14B. In this case, the cylindrical portion 14B may be omitted, but the opening 11 provided in the second yoke member
The size of C becomes different on the left and right sides, which is undesirable in terms of manufacturing and assembly work. In the illustrated embodiment, the engaging portion 15' prevents the pivot pin 13 from moving in both axial directions.

FIG. 5 shows a modification of the spacer member, in which the top wall 1
2B is provided with an open or missing portion 17, and cutout grooves 16, 16 of the cylindrical portions 14, 14 extend in the vertical direction. This structure can simplify the structure of the mold during the molding operation of the spacer member 12.

[Effects of the invention] According to the invention, reliable connection between yoke members can be achieved with a small number of parts, assembly is easy, work such as riveting can be omitted, and the work is significantly improved. Productivity is improved and it is inexpensive.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the yoke member connecting device according to the present invention, Fig. 2 is an exploded perspective view, and Fig. 3 is an exploded perspective view.
The figure is a partially enlarged perspective view of a spacer member, FIG. 4 is a longitudinal cross-sectional view showing a modified example, FIG. 5 is an enlarged perspective view showing a modified example of the spacer member, and FIG. 6 is a schematic diagram showing an example of a conventional wiper device. figure. 2, 3, 4... Yoke member, 5, 6... Pin,
10... First yoke member, 11... Second yoke member, 12... Spacer member, 13... Pivot pin, 10A, 11A, 12A... Side wall, 10
B, 11B, 12B...Top wall, 10C, 11C...
...Opening, 13A...Large diameter part, 13B...Intermediate small diameter part, 14, 14A, 14B...Cylindrical part, 15,1
5'... Engaging portion, 16... Notch groove, 17... Missing portion.

Claims (1)

[Claims for Utility Model Registration] 1. A connecting device for pivotally connecting first and second yoke members each having a cross-sectional shape having substantially upright side walls and a top wall connecting the top ends of the side walls. a synthetic resin spacer member having both side walls that engage with the inner surfaces of both side walls of the first yoke member and the outer surfaces of both side walls of the second yoke member, and a top wall that connects the both side walls; 1st
and a pivot pin extending through both side walls of the second yoke member and the spacer member, the spacer member being integrally provided with a cylindrical portion projecting inward from at least one side wall thereof. The pivot pin is provided with an intermediate small diameter portion at an intermediate position of its length, and the cylindrical portion of the spacer member has an outer diameter corresponding to the opening provided in the side wall of the second yoke member and an outer diameter of the pivot pin. Further, the inner end of the cylindrical portion has an engaging portion protruding radially inward from the inner diameter for engaging with the intermediate small diameter portion of the pivot pin, and a cylindrical portion at the position of the engaging portion. A yoke member connecting device for a vehicle wiper, which is provided with an axial notch that allows the diameter of the yoke member to expand. 2. A missing portion is provided in the top wall of the spacer member at the position where the cylindrical portion is provided.
A yoke member connecting device according to claim 1 of the registered utility model claim.