JPH0551495B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a wiper device for a vehicle.

<Prior Art> Examples of conventional vehicle wiper devices include those shown in FIGS. 2 to 4.
[Refer to Japanese Unexamined Patent Publication No. 59-179437] This vehicle wiper device 1 retracts the wiper blade 2 onto the molding 4 at the lower end of the front window glass 3 (hereinafter referred to as glass) and hides it in the hood 5 when the wiper stops operating. type (so-called concealed type), and in order to prevent the wiper blade 2 from deforming due to the pressing force of the wiper arm 7 when the wiper is stopped, a wiper lifter 8 is adopted, and this wiper lifter 8 lifts the wiper arm 7. The wiper blade 2 is released from the pressing force of the wiper arm 7.

This wiper lifter 8 is attached to the molding 4 at the lower end of the glass 3 with screws 9, and the wiper palm 7 moves on the inclined guide surface 10 of the wiper lifter 8 in the direction of stop movement [direction of arrow A] as if riding on it. It reaches the holding surface 11 and comes into contact with the stopper portion 12 to stop. In this way, the wiper lifter 8 has the function of lifting the wiper arm 7 using the inclined guide surface 10 and the holding surface 11 to prevent deformation of the wiper blade 2, and the function of stopping the wiper arm 7 at a predetermined position using the stopper section 12. It has both.

When attaching the arm head 13 supporting the wiper arm 7 to the wiper drive shaft 14, use the wiper lifter 8, and with the wiper arm 7 positioned to stop at the stopper portion 12, attach the arm head 13 to the wiper drive shaft 14. The wiper arm 7 is attached via the.

In addition, 15 is a buffer member, which is attached to surround the wiper arm 7 and prevents contact with the wiper lifter 8.
16 is a clamp for the wiper arm 7, and 17 is a stay that relieves the contact.

<Problems to be Solved by the Invention> However, in such a conventional vehicle wiper device, when the wiper arm 7 is held by the holding surface 11 of the wiper lifter 8 and is positioned to stop by the stopper portion 12, the wiper arm is Since the wiper arm 7 is installed and fixed, if there is play (accuracy error, installation error, etc.) in the wiper link system (not shown), the wiper arm 7 may not reach the stopper part 12 when the wiper stops operating. First, the wiper blade 2 may not move to a predetermined position under the glass 3 and may not be hidden in the hood 5. Also, in the case of a left-hand drive vehicle, the stopper part 12 of the wiper lifter 8 may not move to the fixed position of the wiper arm 7. [Not shown] may not act as a "position setting stopper" in the direction of rotation, and the wiper arm 7 may also shift when tightening, and if the degree of shift is large, the set position itself may shift. Improvement was desired.

Therefore, this invention anticipates the "backlash" in the wiper link system and corrects it with a wiper lifter,
Even if there are accuracy errors, installation errors, etc.,
An object of the present invention is to provide a wiper device for a vehicle that allows a wiper blade to be stopped at a predetermined position below a windshield.

<Means for Solving the Problems> The configuration of the present invention for achieving the above object will be explained using FIG. 1 corresponding to an embodiment.

The wiper lifter 21 has a recess 23 for setting the initial mounting position of the wiper arm 7 at the front of the wiper arm 7 in the stop movement direction [arrow A direction] by the stopper part 22. The wiper arm 7 can be freely attached to the wiper drive shaft 14 while being positioned in contact with the side surface of the wiper arm 7.

<Function> According to the above configuration, the wiper arm 7 is attached to the wiper drive shaft 14 in a positioning state in which it is in contact with the front or near side side of the recess 23, so that the wiper arm 7 is connected to the wiper link system. Since the initial installation position is set with the "backlash" taken into account and corrected, the wiper arm 7
is the stop position when the operation is stopped (i.e. wiper lifter 2
When the wiper stops operating, the wiper arm 7 always tries to move forward in the stop movement direction from the position where it is stopped by the stopper part 22 of 1.
The wiper blade 2 will definitely come into contact with the stopper portion 22 to prevent further movement, and the wiper blade 2 will come to a complete stop at a predetermined stopping position below the windshield 3.

<Example> Hereinafter, a preferred example of the present invention will be described based on FIG. 1. Incidentally, the same reference numerals are used for parts common to the conventional one, and redundant explanation will be omitted.

Wiper lifter 21 used in this wiper device
In this example, a recess 23 for setting the initial mounting position of the wiper arm 7 is formed in front of the stopper portion 22 in the stop movement direction (direction of arrow A) of the wiper arm 7.

This recessed portion 23 is designed in anticipation of the possibility that the wiper arm 7 will stop on the near side of the stop movement direction [in the opposite direction of arrow A] due to "backlash" in the wiper link system.
By determining the initial mounting position in advance in the front of the stop movement direction, and adding the amount of movement for the distance L to the wiper arm 7 in advance, the negative amount of movement when the wiper arm 7 stops on the near side is compensated for. It's something you end up doing. Therefore, the stopper portion 22
The distance L from the abutment surface 24 is appropriately determined assuming the degree of "backlash" in the wiper link system.

Next, the usage state of this wiper device for a vehicle will be explained.

Attaching the wiper arm 7 When attaching the wiper arm 7 to the wiper drive shaft 14 via the arm head 13, the wiper arm 7 is engaged in the recess 23 to set the initial attachment position of the wiper arm 7. The wiper arm 7 is installed by fastening its base end to the drive shaft 14 with a fixing nut (not shown), but as shown in the figure, in the case of a right-hand drive vehicle, the fixing nut is tightened in the direction (right As the wiper arm 7 rotates, the wiper arm 7 is pressed against the front side surface of the recess 23 and positioned. In addition, for left-hand drive cars, wiper arm 7
Although the directions are reversed, the tightening direction (clockwise rotation) of the fixing nut is the same, so the wiper arm 7 is pressed against the front side surface of the recess 23 and positioned by tightening the fixing nut.

Wiping operation of wiper arm 7 The wiper arm 7, whose initial attachment position is determined by the recess 23, is taken out from the recess 23 and is operated as usual through the wiper link system.

Stopping the wiper arm 7 When the wiper stops operating, the wiper arm 7 moves in the stop movement direction and tries to stop at a predetermined position (a position where it hits the contact surface of the stopper part). At this time, if there is any play in the wiper link system, it will stop in front of the predetermined position, but since the position is set in front of the predetermined position at the time of installation and the amount of movement is added, it is time-consuming. Instead of stopping at the side, it always moves to a predetermined position and stops.

Note that the other configurations and operations are the same as those of the conventional example, and redundant explanations will be omitted.

<Effects> Since the vehicle wiper device according to the present invention has the content as described above, many effects can be expected, and the main ones are listed below.

(b) The initial mounting position of the wiper arm is set with the amount of movement at the time of stop being corrected, taking into account errors in the accuracy and installation of the wiper link system, so that when the wiper stops, the wiper blade is positioned at the bottom of the windshield. (b) Since the wiper arm is installed in a positioning state in which it is in contact with the front or near side side of the recess, the position of the wiper arm can be prevented from shifting when the wiper arm is fixed. (c) Variations in the set position of the wiper arm can be minimized, and (d) the wiper arm and wiper blade are completely hidden within the hood, resulting in a good appearance.

[Brief explanation of the drawing]

FIG. 1 is an enlarged cross-sectional explanatory view showing one embodiment of a vehicle wiper device according to the present invention, FIG. 2 is a front view of a conventional vehicle wiper device, and FIG. 3 is a wiper device shown in FIG. An enlarged view of the device, and Figure 4 shows the third
It is an enlarged sectional explanatory view along the arrow line in the figure. 1... Vehicle wiper device, 3... Front window glass, 7... Wiper arm, 8, 21...
... Wiper lifter, 10 ... Inclined guide surface, 11 ...
Holding surface, 12...stopper portion, 14...wiper drive shaft, 23...recess, A...stop movement direction.

Claims (1)

[Claims] 1. A wiper lifter equipped with an inclined guide surface, a holding surface for lifting, and a stopper section, which is provided at the lower end of the front window glass, lifts the wiper arm when the wiper stops operating, and uses the stopper section to determine the stop position. In the wiper device for a vehicle, the wiper lifter has a recessed portion for setting the initial mounting position of the wiper arm formed in front of the stopper portion in the stop movement direction of the wiper arm, and when the wiper arm is installed, the recessed portion is A wiper device for a vehicle, characterized in that a wiper arm can be freely attached to a drive shaft in a position where it is in contact with the front or near side side of the wiper device.