JP2888651B2 - Opposed wiping wiper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opposing wiping wiper used in a vehicle, in which a pair of wiper arms are reciprocated in opposite directions.

[0002]

2. Description of the Related Art Among wipers for vehicles, there is known an opposing wiping type (a so-called overlap type) wiper in which a pair of wiper arms (wiper arm and blade) are reciprocated in opposite directions.

In this type of wiper, the wiper arm and blade are rotatably supported by pivot shafts, and a pivot lever is fixed to each pivot shaft. A link rod connected to the idler segment is connected to each bot lever,
Further, the idler segment is connected to a crank arm of the wiper motor via a rod. During normal operation of the wiper, the rotational power of the wiper motor is transmitted to the pivot lever via the idler segment and the link rod, whereby each pivot shaft is reciprocated and the wiper arm and blade are reciprocated in the opposite directions. .

As shown in FIG. 10, in this type of opposing wiping type wiper 80, a pair of wiper arms and blades 8 are provided at the center of the windshield glass 82 (near the lower turning position of each of the wiper arms and blades 84 and 86).
4 and 86 are reciprocated so as to overlap each other, so that a large gap S is provided at the set position (lower inversion position) of each wiper arm & blade 84, 86 so that the pair of wiper arms & blades 84, 86 do not interfere with each other. I was For this reason, the set position of the wiper is inevitably higher than that of the general parallel interlocking wiper 90 shown in FIG.

Therefore, in such an opposed wiping type wiper, when the wiper is stopped, the wiper arm and blade are moved further downward (corresponding to the gap L) from the lower reversing position, so that the cowl box at the lower end of the windshield glass is moved. A retractable wiper provided with a so-called rise-up mechanism that stores the wiper in a housing has been proposed (for example, Japanese Patent Application No. 47-109).
No. 116, JP-A-64-30860).

In the wiper having such a rise-up mechanism, when the wiper is stopped and stored, the effective pitch of the crank arm of the wiper motor is changed by an eccentric pin, an eccentric shaft, bending or extension of the crank arm, or the like. By controlling itself and changing the rotation angle of the crank arm of the wiper motor,
As shown in FIG. 12, the pivot lever is moved further by a predetermined angle than at the time of normal operation, and the wiper arm & blade is moved further below the lower turning position (so-called rise-up) to stop and store. Therefore,
It is possible to improve the downward visibility by lowering the setting position of the wiper.

However, in the opposed wiping type wiper provided with the rise-up mechanism, a pair of wiper arms &
Since the blades are always interlocked with each other, even if the wiper arms & blades set so as to approach and stop storage close to each other are raised for normal operation and moved from the storage stop position to the lower turning position. There is no change in the relative positional relationship between the two wiper arms and blades, especially in the size relationship between the gaps. Therefore, as shown in FIG. 13, a sufficient gap S at the wiper arm and blade lower turning position, which is indispensable for reciprocating rotation of both wiper arms & blades 84 and 86 at the center of the windshield glass 82 so as to overlap each other, cannot be secured. In other words, the reciprocal rotation of both wiper arms & blades 84 and 86 is hindered. On the other hand, if the gap S at the lower turning position is sufficiently opened and the wiper arms & blades 84, 86 are set, the wiper arms & blades 84, 86 approach in the wiper retracted state, and the storage cannot be stopped. Therefore, in this case, the set position of the wiper arms & blades 84, 86 in the storage stopped state becomes high in spite of the rise-up mechanism being added, and obstructs the downward view.

As described above, in the opposed wiping type wiper to which the above-mentioned conventional rise-up mechanism is simply added, the original purpose of lowering the set position of the wiper to secure the lower visibility cannot be sufficiently achieved. .

[0009]

SUMMARY OF THE INVENTION In consideration of the above facts, the present invention makes it possible to stop the storage of the wiper arm and blade at a low set position to secure a sufficient downward view, and to reduce this to the usual wiper arm and blade. An object of the present invention is to provide an opposing wiping wiper that can be realized without hindering reciprocating rotation.

[0010]

According to a first aspect of the present invention, there is provided an opposed wiping type wiper in which a pair of wiper arms respectively supported by a pivot shaft are reciprocally opposed to each other by driving of a wiper motor, and a wiping area is in a lower inverted position. In the opposing wiping wiper that overlaps in the vicinity, the wiper arm is connected to the pivot axis of the upper wiper arm that is located higher in the lower reversing position of the pair of wiper arms, and when the wiper is stopped, only the pivot axis of the upper wiper arm is moved downward in the wiper arm direction. And a rotating means for rotating only the pivot shaft of the upper wiper arm by a predetermined amount in the upper direction of the wiper arm when the operation of the wiper is started.

According to a second aspect of the present invention, in the opposed wiping type wiper according to the first aspect, the upper wiper arm is a semi-pantered arm.

[0012]

In the opposed wiping type wiper according to the first aspect, during normal operation, the driving force of the wiper motor is transmitted to each pivot shaft, and the pair of wiper arms are reciprocated to face each other. Duplicate.

On the other hand, when the wiper is stopped, only the pivot shaft of the upper wiper arm is rotated by a predetermined amount in the lower direction of the wiper arm by the rotating means. Therefore, only the upper wiper arm supported by the pivot shaft is moved further below the lower turning position and stopped. Further, when the operation of the wiper is started, only the pivot shaft of the upper wiper arm is rotated by a predetermined amount in the upper direction of the wiper arm by the rotating means. Therefore, after only the upper wiper arm is moved (rise-up) from the stop position to the lower reversal position, the normal operation state is established.

As described above, when the wiper is operated, only the upper wiper arm positioned higher in the lower reversing position is moved from the stop position further below the lower reversing position to the lower reversing position by the rotating means, so that the wiper is stopped. Even when both wiper arms are set to approach each other, only the upper wiper arm is raised by the rotating means and moved from the stop position to the lower inversion position at the start of the wiper operation. Can be opened sufficiently. For this reason, both wiper arms are reciprocated to face each other,
Even if the wiping areas overlap near the lower turning position, the wiper arms and the blades can be prevented from interfering with each other, so that the reciprocating rotation of the wiper arms is not hindered. Further, even if the gap between the two wiper arms is sufficiently opened at the lower turning position, in the stopped state of the wiper, only the upper wiper arm is rotated in the lower direction by the rotating means to set the two wiper arms closer to each other. The position of the wiper arm can be lowered when the wiper arm is stopped.
There is no obstruction to the lower view by the blade.

Thus, the wiper arm can be stopped at the low set position to secure a sufficient downward view,
In addition, this can be realized without hindering the normal reciprocating rotation of the wiper arm.

According to the second aspect of the present invention, the wiper arm can be stopped at a low set position without obstructing the normal reciprocating rotation of the wiper arm, and not only can the wiper arm secure a sufficient downward visibility, but also the wiping can be performed. The pattern is further improved and the unwiped area of the important wiping area is reduced.

[0017]

FIG. 1 is a schematic overall configuration diagram of a vehicle wiper 10 according to a first embodiment of the present invention, and FIG. 2 is an overall side view of the wiper 10.

The wiper 10 is of an opposite wiping type (a so-called overlap type) composed of a right wiper 10A and a left wiper 10B. The left and right wipers are wiper arms 12A, 12B, wiper blades 14A, 14 respectively.
B, and one of the wiper arms 12A and the wiper blade 14A are set so as to be positioned higher in the lower turning position and the storage stop position. These left and right wipers are driven by a wiper arm 1 by a driving mechanism described later in detail.
2A and 12B are reciprocated and the wiper blade 14A,
14B reciprocally rotate to wipe off raindrops and the like attached to the windshield glass 82.

The wiper arm 12A of the right wiper 10A is fixed to one end of a pivot shaft 16 and is rotatably supported, whereby the wiper arm 12A and the wiper blade 14A always rotate together with the pivot shaft 16. One end of a pivot lever 18 is fixed to the other end of the pivot shaft 16. Therefore, by pivoting the pivot lever 18, the pivot shaft 16 can be rotated. One end of a rod 20 is connected to the other end of the pivot lever 18, and the other end of the rod 20 is connected to a segment lever 44 which constitutes a rotating means described later.

On the other hand, the wiper arm 12 of the left wiper 10B
B is fixed to one end of the pivot shaft 26 and is rotatably supported, whereby the wiper arm 12B and the wiper blade 14B always rotate together with the pivot shaft 26. Further, one end of a pivot lever 28 is fixed to the other end of the pivot shaft 26, and the pivot shaft 28 can be rotated by swinging the pivot lever 28.
One end of a rod 30 is connected to the other end of the pivot lever 28, and the other end of the rod 30 is connected to a bell crank 32.
It is connected to.

The bell crank 32 is rotatably supported at its center in the longitudinal direction by a shaft 34.
0 is connected to one end of the bell crank 32. The other end of the bell crank 32 is connected to one end of a rod 36, and the other end of the rod 36 is connected to a crank arm 40 of a wiper motor 38. For this reason, the rotational force of the wiper motor 38 is transmitted to the bell crank 32 via the rod 36, and the bell crank 32 is rotated around the axis 34, and the rotation of the bell crank 32 is further transmitted via the rod 30 to the pivot lever 28. To be transmitted to

One end of a rod 42 is connected to the other end of the bell crank 32 (near the connection portion with the rod 36), and the other end of the rod 42 is connected to a segment lever 44. The segment lever 44 is formed in a substantially triangular shape in a plan view, and includes the rod 20 and the rod 4.
An end opposite to the connection portion 2 is rotatably connected to a tip end of a crank arm 48 of a rise-up motor 46 as a rotating means by a shaft 50. The segment lever 44 is normally rotatably held at a predetermined position by a crank arm 48 of the rise-up motor 46 (when the rise-up motor 46 is stopped). This rotation is transmitted to the segment lever 44 via the rod 42, and the segment lever 44 is rotated about the axis 50. Further, the rotation of the segment lever 44 is transmitted to the pivot lever 18 via the rod 20. It has become. on the other hand,
When the rise-up motor 46 is operated when the wiper motor 38 is stopped, the segment lever 44 is moved together with the crank arm 48 by the rotation of the rise-up motor 46, and this moving force is transmitted to the pivot lever 18 via the rod 20. Configuration.

Next, the operation of the first embodiment will be described. In the wiper 10 having the above-described configuration, when the storage of the wiper is stopped, the wiper motor 38 and the rise-up motor 46 are both stopped, and the wiper blades 14A and 14B of the right wiper 10A and the left wiper 10B are at the storage positions (line L ₁ ). And is stopped and stored in the cowl box at the lower end of the windshield glass (not shown). Further, the rod 20, the segment lever 44 and the rod 42
Is in the state shown by the dashed line in FIG.

Here, when the wiper 10 is operated, the rise up motor 46 is operated to operate the right wiper 1.
Only the wiper blade 14A of 0A is so-called rise-up. That is, the wiper motor 38 (the crank arm 4
When the rise-up motor 46 is operated in this state, the segment lever 44 is moved together with the crank arm 48 by the rotation of the rise-up motor 46. In this case, since the connection position of the rod 42 with the bell crank 32 is fixed, as shown by a two-dot chain line in FIG.
Is pulled, and only the pivot lever 18 is rotated.
As a result, the pivot shaft 16 is rotated, and the wiper blade 14A is moved by the angle Δθ from the storage stop position (line L ₁ ) to reach the lower inversion position (line L ₂ ).

Next, the rise up motor 46 is stopped, and at the same time, the wiper motor 38 is operated, so that the normal operation of the wiper 10 is started.

During normal wiper operation, the rise-up motor 46 is stopped, and the crank arm 48 is stopped at a predetermined position as shown by a solid line in FIG. The segment lever 44 is rotatably held at a predetermined position by the crank arm 48.

When the wiper motor 38 operates, the torque is transmitted to the bell crank 32 via the rod 36, and the bell crank 32 is rotated around the shaft 34. When the bell crank 32 is turned, the turning power is
0, the rotation is transmitted to the pivot lever 28, whereby the pivot shaft 26 is rotated and the wiper arm 12B is rotated. At the same time, the rotational force of the wiper motor 32 transmitted to the bell crank 32 is transmitted to the segment lever 44 via the rod 42 and
4 is rotated about an axis 50, and the rotation of the segment lever 44 is further controlled by the pivot lever 18 via the rod 20.
Is transmitted to Accordingly, the pivot shaft 16 is rotated, and the wiper arm 12A is also rotated in synchronization with the wiper arm 12B.

Pivot lever 18 and pivot lever 2
8, the wiper motor 38 makes a half turn
As shown by a solid line in FIG.
4A is the lower inversion position (line L_Two) To angle θ_DMoved
Upside-down position (line L_Three)
14B is the storage stop position, that is, the lower inversion position (line L
₁) To angle θ_AMoved to the upper inversion position (line L_FourTo)
You. After that, the bell crank 32, the pivot lever 18
And the pivot lever 28 reverses and moves to the original position again.
This is repeated thereafter, and the pivot lever 18
And the pivot lever 28 swings, and the wiper arm 12
A and 12B are reciprocated in opposite directions.

Next, when storing the left and right wiper stops,
The wiper motor 38 is stopped, and the rise up motor 46 is operated again.

As soon as the wiper motor 38 is stopped, the wiper blade 14B is stopped at the storage stop position, that is, the lower reversing position (line L ₁ ), and the wiper blade 14A is stopped at the lower reversing position (line L ₂ ). When the rise-up motor 46 is operated in this state, the rotation of the rise-up motor 46 causes the segment lever 44 to move together with the crank arm 48 in a direction opposite to the direction at the start of the wiper operation. In this case, since the shaft 50 of the rod 42 is not moved, the rod 20 is pushed in by the movement of the segment lever 44, and only the pivot lever 18 is rotated. As a result, the pivot shaft 16 is rotated and the wiper arm 1 is rotated.
2A is moved, as shown by the two-dot chain line in FIG.
The wiper blade 14A is further moved downward by an angle Δθ from the lower reversing position (line L ₂ ) and returns to the storage stop position (line L ₁ ).

As described above, only the upper wiper arm 12A positioned at the lower reversing position is raised by rotation of the rise-up motor 46 when the wiper operation is started, and is moved in the wiper arm storage direction when the wiper operation is stopped. Even if the wiper blade 14A and the wiper blade 14B are set so as to approach each other in the stopped state (line L ₁ ), during normal operation of the wiper, only one of the wiper arms 12A is raised and the storage stop position (line L 1). _The wiper blade 1 is moved from ₁ ) to the lower turning position (line L ₂ ).
The gap between 4A and wiper blade 14B can be greatly opened. In other words, it is possible to sufficiently secure a gap at the inversion position below the wiper arm, which is indispensable for reciprocating rotation of the wiper blade 14A and the wiper blade 14B so as to overlap each other at the center of the windshield glass. Therefore, there is no hindrance to the reciprocating rotation of both wiper arms (wiper blades). Conversely, the wiper blade 14A and the wiper blade 1
Even when the gap with the wiper 4B is sufficiently opened, the storage of the right wiper 10A and the left wiper 10B in the storage stopped state can be lowered because both the wiper blades can approach and stop the storage in the wiper storage stopped state. Does not obstruct view.

The optimum rise-up angle Δθ when only the wiper arm 12A (wiper blade 14A) is raised up, that is, the optimum rotation angle of the pivot lever 18 is set by the moving amount of the segment lever 44. The amount of movement is determined by, for example, the arm length of the crank arm 48 or the segment lever 4.
The optimum rise-up angle of the wiper arm 12A may be set by appropriately setting the length of the arm 4 itself, the length of the pivot lever 18, and the like. As described above, the amount of movement (rotation angle) of the wiper arm 12A at the time of rise-up can be set freely, and the degree of freedom of design and the range of application to various types of vehicles are expanded. Further, the rise-up motor 46 does not need to be a special motor at all, but can be realized by using a normal motor, and cost can be reduced.

As described above, in the wiper 10, the wiper arms 12A and 12B (the wiper blades 14A and 14B) are used.
B) can be stopped at a low set position to secure a sufficient downward view, and the wiper arm 12
A, 12B can be realized without obstructing the normal reciprocating rotation.

Next, a second embodiment of the present invention will be described. It should be noted that the same parts as those of the first embodiment
The same reference numerals are given to the embodiment, and the description is omitted.

FIG. 3 is a schematic overall configuration diagram of a vehicle wiper 60 according to a second embodiment of the present invention, and FIG. 4 is an overall side view of the wiper 60. FIG. 5 is a cross-sectional view around the pivot shaft 16, and FIG. 6 is a rear view around the pivot shaft 16.

In the wiper 60, a sub-lever 62 is fixed to the pivot shaft 16 supporting the wiper arm 12A of the right wiper 10A instead of the pivot lever 18,
Thereby, the wiper arm 12A and the wiper blade 14
A always rotates with the pivot shaft 16 and the sub-lever 62. A gear 64 is formed at the tip of the sub-lever 62.

On the other hand, on the outer periphery of the pivot shaft 16, a main lever 66 constituting a rotating means is supported coaxially with the pivot shaft 16 so as to be relatively rotatable. The main lever 66 has a rod 42 connected to the bell crank 32.
Are connected at one end. A rise-up motor 68 as a rotating means is attached to the main lever 66. The vertical rotation shaft 70 of the rise-up motor 68 penetrates the main lever 66, and further has a sector gear 72 attached to the tip. The sector gear 72 meshes with the gear 64 of the sub-lever 62. For this reason,
Sector gear 72 rotates (relative rotation with main lever 66)
By doing so, the sub-lever 62 is rotated.

Also in the second embodiment, when the wiper storage is stopped, the wiper motor 38 and the rise up motor 68 are both stopped, and the wiper blades 14A and 14B of the right wiper 10A and the left wiper 10B are moved to the storage positions ( It is stopped and stored at the line L ₁ ).

Here, when operating the wiper 60, the rise up motor 68 is operated and the right wiper 1 is operated.
Only the wiper blade 14A of 0A is so-called rise-up. That is, when the wipe-up motor 38 is stopped and the rise-up motor 68 is operated in this state, the sector gear 72 is rotated by the rotation of the rise-up motor 68 (vertical rotation shaft 70). In this case, since the rod 42 is connected to the main lever 66 and is in a stopped state, the rotation of the sector gear 72 causes the sub-lever 62 to rotate. As a result, the pivot shaft 16 is rotated, and the wiper blade 14A is moved from the storage stop position (line L ₁ ) to the angle Δθ.
It is moved to the lower inversion position (line L ₂ ).

Next, the rise-up motor 68 is stopped, and at the same time, the wiper motor 38 is operated, and the normal operation of the wiper 60 is started.

During normal wiper operation, the rise-up motor 68 is stopped, the meshing relationship between the sector gear 72 and the sub-lever 62 does not change, and the main lever 66 can rotate relative to the pivot shaft 16. When the rotational force of the wiper motor 38 is transmitted to the main lever 66 via the rod 42, the main lever 6 is maintained while the sub-lever 62 is kept in mesh with the sector gear 72.
6 is rotated. As a result, the pivot shaft 16 is rotated, and the wiper arm 12A is rotated in synchronization with the wiper arm 12B.

When the left and right wiper stops are stored, the wiper motor 38 is stopped and the rise up motor 6 is stopped.
8 is operated again, stored Pibotsuto shaft 16 is moved wiper arm 12A is rotated by the movement of the aforementioned reverse, the wiper blade 14A again being further angle Δθ moved downward from the lower turning position (line L ₂₎ It reaches the stop position (line L ₁ ).

As described above, also in the second embodiment, one of the wiper arms 1 positioned at the upper position in the lower reversing position.
Only 2A is driven by the rotation of the rise up motor 68.
The wiper blade 14A and the wiper blade 14B can be set so as to approach each other when the wiper arm is in the retracted state, and the wiper blade is moved during the normal operation of the wiper. The gap between 14A and wiper blade 14B can be greatly opened. Therefore, there is no hindrance to the reciprocating rotation of both wiper arms (wiper blades). Conversely, even if the gap between the wiper blade 14A and the wiper blade 14B at the lower inversion position is sufficiently opened, both the wiper blades can be approached and stopped in the wiper retracted state, so that the right wiper 10A and the left wiper 10B The set position in the storage stopped state can be lowered, and the lower visibility is not obstructed.

In each of the above embodiments, as shown in FIG. 7, the wiper arms 12A and 12B, the wiper blade 1
General opposed wiping type wiper 1 having 4A, 14B
0, the case where the rise-up mechanism is applied to the wiper arm 12A in the wiper 60 has been described. However, the present invention is not limited to this. As shown in FIG. 8, the wiper arm 12A may be replaced with a semi-panta arm 76 instead of the wiper arm 12A.
In this case, the right wiper 1 is set by setting the wiper blade 14A so as to be in a state parallel to the wiper blade 14B at the lower reversal position of the semi-panta arm 76.
The set positions of the 0A and the left wiper 10B in the storage stopped state can be lowered, and the lower visibility is not obstructed. Further, the left and right wiping areas of the windshield glass 82 on the left and right sides are reduced, so that a wide field of view is secured.

Further, as shown in FIG. 9, the semi-panta arm 76 is set so that the wiper blade 14A at the lower turning position is inclined with respect to the wiper blade 14B, so that the right wiper 10A and the left wiper 1 are set.
In addition to lowering the set position in the storage stopped state of 0B and ensuring a sufficient downward view, the area left behind in the upper center of the windshield glass 82 is reduced, and the wiping pattern is further improved and important. The remaining unwiped area of the wiping area is reduced.

[0046]

As described above, the opposing wiping type wiper according to the present invention can secure a sufficient downward view by stopping the storage of the wiper arm and the blade at a low set position, and can reduce the normal view of the wiper arm and the blade. Has an effect that can be realized without hindering the reciprocating rotation of the.

[Brief description of the drawings]

FIG. 1 is a schematic overall configuration diagram of a vehicle wiper according to a first embodiment of the present invention.

FIG. 2 is an overall side view of the wiper corresponding to FIG.

FIG. 3 is a schematic overall configuration diagram of a vehicle wiper according to a second embodiment of the present invention.

FIG. 4 is an overall side view of the wiper corresponding to FIG.

FIG. 5 is a sectional view around a pivot shaft of a wiper according to a second embodiment.

FIG. 6 is a rear view of the vicinity of the pivot shaft corresponding to FIG. 5;

FIG. 7 is a schematic front view showing a correspondence relationship between a vehicle wiper and a windshield glass according to the first and second embodiments.

FIG. 8 is a schematic front view showing a correspondence between a vehicle wiper and a windshield glass according to another embodiment.

FIG. 9 is a schematic front view showing the correspondence between a vehicle wiper and a windshield glass according to another embodiment.

FIG. 10 is a schematic configuration diagram of a conventional opposing wiping type wiper having no rise-up mechanism.

FIG. 11 is a schematic configuration diagram of a general parallel interlocking wiper.

FIG. 12 is a schematic view showing a state in which a conventional wiper-type wiper having a rise-up mechanism has a wiper retracted state;

FIG. 13 is a schematic view showing a relative relationship between a wiper arm and a wiper blade at a wiper lower turning position of a conventional opposed wiping type wiper having a rise up mechanism.

[Explanation of symbols]

 Reference Signs List 10 wiper 10A right wiper 10B left wiper 12A wiper arm 12B wiper arm 14A wiper blade 14B wiper blade 16 pivot shaft 26 pivot shaft 38 wiper motor 44 segment lever 46 rise up motor 60 wiper 68 rise up motor

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60S 1/04 B60S 1/18

Claims (2)

(57) [Claims] A pair of wiper arms each supported by a pivot shaft are opposed to each other by driving a wiper motor.
To be reciprocatingly rotated, wiping region near the lower turning position
In the overlapping opposing wiping type wiper, the upper wiper arm is pivotally connected to a pivot shaft of an upper wiper arm positioned higher at a lower reversal position of the pair of wiper arms, and when the wiper is stopped , only the pivot shaft of the upper wiper arm is moved in a lower direction of the wiper arm. Rotate a predetermined amount
At the same time, the upper wiper arm is
The pivot axis of the system only a predetermined amount in the upper direction of the wiper arm.
An opposed wiping wiper comprising a rotating means for rotating the wiper. 2. The opposing wiping wiper according to claim 1, wherein the upper wiper arm is a semi-panta arm.