JPH081163Y2 - Pivot cap structure in wiper device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a pivot cap structure in a wiper device attached to a vehicle such as a private car, a bus, or a truck.

[Problems to be Solved by Prior Art and Invention] In general, among wiper devices mounted on a vehicle of this type, there is a wiper device such as a rear wiper device which is mounted by penetrating glass indoors and outdoors. In this case, the pivot cap made of a rubber-like elastic material is passed through the through hole formed in the glass to be fixed, and the wiper shaft can be inserted into the pivot cap. This pivot cap has a configuration that it can be attached by fitting the concave groove part formed on the outer periphery into the through hole formed in the glass plate, but the size of the concave groove part corresponds to the shape of the glass plate. In the case where the concave groove is made smaller due to the molding error, temperature shrinkage, etc. There is a problem that mounting work becomes difficult.

Therefore, with respect to the lip part of the pivot cap that will form one groove side surface of the concave groove part where the glass plate fits, it is separated from the plate surface of the glass plate on the groove back side and on the plate surface of the glass plate on the tip side. It is proposed that the pressing force be applied in a resilient manner so that the pivot cap can be easily attached to the fitting hole even if the thickness of the glass plate changes. However, in this case, the mounting and support of the pivot cap is only supported in the plate thickness direction by the tip of the lip piece, and since the holding force depends on the elastic force of the lip piece, the load is applied to the pivot cap in the plate thickness direction. There is another problem to be solved that it is easy to move, the support of the inner peripheral surface of the through hole tends to be unstable, the strength is inferior, backlash is likely to occur, and the waterproofness is insufficient.

[Means for Solving the Problems] In view of the above-mentioned circumstances, the present invention was devised with the object of providing a pivot cap structure in a wiper device capable of eliminating these drawbacks. In a wiper device in which a wiper shaft is assembled through a pivot cap that is fixed to a perforated through hole, a groove for attaching the pivot cap to a glass plate is formed on the outer periphery of the pivot cap, and an inner peripheral surface of the through hole. The surface facing the groove is the bottom surface of the glass plate, and the facing surfaces of the flange piece and the lip piece having a large diameter on the inner and outer surface sides of the glass plate are the groove side surfaces, and the glass plate facing surface of the lip piece is formed. On the inner side of the groove, the facing distance from the flange is wide on the inner side of the groove and narrow on the distal side so that it is elastically pressed against the surface of the glass plate on the tip side. On the other hand, on the bottom surface of the groove, a taper surface is formed which is inherited from the groove end of the glass plate facing surface of the lip piece and elastically presses against the inner peripheral surface of the through hole. To do.

According to the present invention, the rubber cap can be used in common and the rattling can be prevented and the waterproof property can be improved.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.
In the drawings, reference numeral 1 denotes a glass plate for a rear window, and a through hole 1a formed in the glass plate 1 has a pivot cap 2 through which the present invention is applied, which is fixed to the through hole 1a. , The pivot cap 2 has a wiper shaft 3
Is inserted.

Reference numeral 4 is a wiper motor, and 5 is a casing in which a speed reducer is installed. The wiper shaft 3 is rotatably supported by a support 6 integrally provided on the casing 5 via a bearing 7. The base end of the wiper arm 8 is integrally connected to the tip of the wiper shaft 3 protruding from the support 6.

A support 6 is fitted in and fixed to the inner peripheral portion of the pivot cap 2, and a concave groove 2a for attaching to the glass plate 1 is formed in the outer peripheral portion of the pivot cap 2. That is, the inner cap piece 2b and the outer lip piece 2c are formed on the pivot cap 2b so as to have a large diameter in order to form the recessed groove 2a in the pivot cap 2 but are formed on the brim piece 2b. The inner side groove side surface 2d is formed in a flat shape so as to substantially follow the glass plate surface. The groove bottom surface 2e of the concave groove 2a formed substantially vertically to the indoor groove side surface 2d is a tapered surface 2f such that the groove diameter becomes gradually larger toward the outdoor side and becomes shallower. And the starting position of this tapered surface 2f from the groove bottom surface 2e is
The indoor side surface 1b of the glass plate 1 is set to start from the indoor side rather than the outdoor side surface 1c position of the glass plate 1 in a state of being in contact with the indoor groove side surface 2d. Among the set glass thicknesses, the one having the thin thickness t is set to have the above-mentioned positional relationship, and thereby, the setting is made so as to press the outdoor side inner peripheral surface portion of the glass plate through hole 1a. .

Furthermore, the tapered surface 2f continues beyond the outdoor side surface 1c of the thick glass plate 1 having the thickness T to the outdoor side, and is in the top state at a position biased to the tip end side of the lip piece.
The concave groove formed in 2c is taken over by the groove side surface 2g on the outside of the chamber.
From the state in which there is a gap between the outer surface of the glass plate and the outer surface of the glass plate, the taper surface 2f inclines in the direction opposite to the tapered surface 2f so as to gradually approach the outer surface 1c toward the outer diameter end (tip) side, and the thickness t
The groove width is narrower toward the front end side, that is, wider toward the inner side of the groove so as to extend beyond the outdoor side surface 1c of the glass plate 1 and further toward the indoor side, and the lip piece 2c is formed with the groove side surface 2g. It is set so that it becomes sharper toward the outer diameter end side in the state of

In the embodiment of the present invention constructed as described above, the pivot cap 2 is fixed to the through hole 1a of the glass plate 1 by penetration, and at that time, the concave groove 2a of the pivot cap 2 is formed.
Can cope with the glass plate 1 whose thickness is changed to T or t.

That is, the lip piece 2c on which the outdoor groove side surface of the concave groove 2a for fixing the pivot cap 2 to the glass plate 1 is formed is an inclined surface whose groove width becomes wider toward the inner side of the groove, and its tip end is made of glass. While elastically deforming corresponding to the plate thicknesses t and T to press the outdoor side surface of the glass plate, the slope start portion of the tapered surface 2f formed on the outdoor side surface portion of the groove bottom surface 2e is at the tip of the lip piece. The outer side surface of the inner peripheral surface of the through hole 1a of the pressed glass plate 1 is elastically pressed.

As a result, even if the glass plate 1 changes in thickness from t to T, the glass plate 1 can be reliably assembled in the waterproof state without rattling to the pivot cap 2, and Even if the plate thickness is changed depending on the grade, it is sufficient to prepare one kind of pivot cap 2, and it is not necessary to prepare a plurality of types corresponding to the plate thickness change as in the conventional case.

As described above, in the embodiment of the present invention, the groove side piece 2g of the lip piece 2c is inclined so that the groove width increases toward the inner side of the groove, and can cope with changes in the plate thicknesses T and t. Despite being the pivot cap 2, the pivot cap 2 is supported on the glass plate 1 in addition to the tip end of the lip piece 2c elastically pressing against the glass plate chamber outer surface 1c.
The inclined start portion of the tapered surface 2f formed on the through hole groove bottom portion 2e elastically presses and contacts the outdoor side inner peripheral surface portion of the through hole 1a, whereby the pivot cap 2 has It can support elastically at two points with the bottom, and it can prevent rattling and exert a waterproof effect.

Of course, the present invention is not limited to the above-mentioned embodiment, and even if the outer peripheral edge portion 2h of the groove side surface 2d of the collar piece 2b is formed in an R shape as in the second embodiment shown in FIG. good. In such a case, when the pivot cap 2 is fixed to the through hole 1a from the outdoor side, the outer peripheral edge portion 2h is caught on the indoor side surface 1b of the glass plate 1 and is not properly attached. Therefore, there is an advantage that the workability of the mounting work of the pivot cap 2 can be improved, and the deterioration of waterproofness due to poor mounting can be avoided.

[Effects] In summary, since the present invention is constructed as described above, the pivot cap is attached by fixing the concave groove portion to the glass plate through hole, but in this case,
The tip of the lip piece presses the glass plate elastically,
Since the inner side of the groove is separated from the glass plate surface and has a gap, it is possible to cope with a change in thickness of the glass plate and an error.

Moreover, in this case, the pivot cap is supported on the glass plate by pressing and supporting the tip of the lip piece in the plate thickness direction, and the tapered surface formed on the groove bottom surface is elastically pressed on the inner peripheral surface of the glass plate through hole. By supporting the pressure in two directions by pressing, the pivot cap can support the change in the thickness of the glass plate, etc., but the pivot cap can be reliably supported. It is possible to prevent backlash and ensure waterproofness.

[Brief description of drawings]

FIG. 1 shows an embodiment of a pivot cap structure in a wiper device according to the present invention. FIG. 1 is a sectional view of a main part of the wiper device, FIG. 2 is a sectional view of the pivot cap, and FIG. FIG. 3 is a sectional view of a pivot cap showing an embodiment. In the figure, 1 is a glass plate, 1a is a through hole, 1c is an outdoor surface, 2 is a pivot cap, 2a is a groove, 2b is a flange piece, 2c is a lip piece, 2e is a groove bottom surface, 2f is a tapered surface, 2g is a lip. The groove side surface 3 of the piece is a wiper shaft.

Claims (1)

[Scope of utility model registration request] 1. A wiper device in which a wiper shaft is assembled through a pivot cap that is fixed to a through hole formed in a glass plate, and a groove for attaching the pivot cap to the glass plate is formed on the outer periphery of the pivot cap. , The surface facing the inner peripheral surface of the through hole is the groove bottom surface, in forming each facing surface of the flange piece and the lip piece having a large diameter on the inner and outer surface side of the glass plate to be the groove side surface, The glass plate facing surface of the lip piece is separated from the plate surface of the glass plate on the groove back side, and at the tip end side, the facing interval with the flange is so as to press the plate surface of the glass plate elastically on the groove back side. The taper surface is formed on the bottom surface of the groove, which is inherited from the deep end of the groove of the glass plate facing surface of the lip piece and presses against the inner peripheral surface of the through hole that is elastically pressed, while widening is set to be narrower on the tip side. Wiper wear characterized by having done Pibotsutokiyatsupu structure in.