JP2539404Y2 - Pivot seal structure of semi-panta wiper - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semi-pantograph type wiper having a main arm and a sub arm arranged in parallel with the main arm, and more particularly to a seal structure for a pivot portion.

[0002]

2. Description of the Related Art In a wiper of a vehicle such as an automobile, there is known a semi-pantograph type wiper in which a wiper arm for supporting a wiper blade is formed in a semi-pantograph structure including a main arm and a sub-arm arranged in parallel with the main arm. Have been. In this semi-pantograph type wiper, when the wiper blade swings around the pivot axis by the action of the sub-arm, the wiper blade slides by an appropriate amount around the pivot axis of the main arm of the wiper blade along with this movement. The shape of the wiping area is adjusted.

Further, the sub arm is supported by a base member. However, in order to prevent the base member from rotating together with the swing of the wiper and to prevent an assembly error when attaching the wiper to a vehicle body, A pin is fixed to the base member, a reference hole is provided in the body panel of the vehicle body, and the pin is inserted into the reference hole to perform positioning and rotation stop. The pin and the pivot body are respectively provided with axially symmetrical seal members.

[0004]

However, in the above-described pivot structure, the distance between the pivot body and the pin must be increased in order to prevent the sealing members from interfering with each other and impairing the sealing performance. However, there is a problem that the entire pivot becomes large. In addition, each seal member is formed in a shape symmetrical with an axis in consideration of prevention of erroneous assembly. As a result, the shape of the skirt portion of the sealing member is restricted, and there is a portion that cannot follow the shape of the vehicle body panel, resulting in a problem that the sealing performance is reduced.

[0005]

Therefore, in the present invention, a pivot shaft having a main arm attached to a distal end thereof and a base member of a sub-arm fitted to an intermediate portion thereof, and a base portion of the pivot shaft being pivotally attached to a vehicle body. Panel mounted
A pivot body having a holder which is provided on the base member, a regulating pin which engages with the holder via the vehicle body panel to stop rotation and position of the pivot body, and is attached to the regulating pin and the pivot body. In a seal structure of a pivot portion of a semi-pantograph wiper, a wiper arm supporting a wiper blade includes the main arm and the sub-arm arranged in parallel with the main arm. The pivot body and the seal member of the regulating pin located on the side are integrally formed.

[0006]

[Function] Since the pivot body located on the vehicle body panel side from the base member and the sealing member of the regulating pin are integrally formed,
The distance between the pivot body and the restriction pin can be reduced. Further, by forming the seal member integrally, it is possible to give the seal member a direction at the time of mounting, so that the seal member can be formed without being occupied by the conventional seal member shape, and the skirt portion of the seal member can be formed. The shape can be formed into a shape that can be in close contact with the vehicle body panel.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A pivot structure of a semi-pantograph wiper according to an embodiment of the present invention will be described below. FIG.
, Reference numeral 1 denotes a semi-pantograph-type wiper, and the wiper 1 has a main arm 3
The wiper blade 5 is pivotally supported on the main arm 3 and the sub arm 4 by a pair of pins 5a and 5b. And the wiper arm 2
The swing center of the sub arm 4 and the swing center of the main arm 3 are set at different positions, and the swing of the main arm 3 (arrow a) causes the sub arm 4 to rotate the wiper blade 5 around the pin 5 a ( A link mechanism is formed as shown by arrow b). Reference numeral 6 denotes a front panel, 7 denotes a window glass, and 7a denotes a weather strip.

FIG. 1 shows the structure of the pivot portion of the base 2A of the wiper arm 2. As shown in FIG.

In FIG. 1, the base of the main arm 3 is directly fitted to a tapered shaft with a knurl of a pivot shaft 8, and a nut 10 is screwed into a screw portion 9 formed at the upper end of the pivot shaft 8. Installed with. The sub arm 4 is pivotally connected to a sub arm base 11 serving as a base member attached to the pivot shaft 8 with a pin 12. Further, a cover 13 that covers the screw portion 9 and the nut 10 is attached to the base of the main arm 3.

The wiper arm 2 including the main arm 3 and the sub arm 4 having such a configuration is assembled as an assembly of the wiper arm 2 including the sub arm base 11.

[0011] The pivot shaft 8 has an intermediate portion at the holder 1.
4, is axially positioned with respect to the holder 14 by the snap ring 15, and is attached to the vehicle body panel 6 through the holder 14.

In this case, the vehicle body panel is formed in a double structure including a front panel 6 as an outer panel and a dash reinforcement 16 as an inner panel on the inside thereof. 1
6 is a strength member, the holder 14 and the pivot shaft 8 are connected to the dash reinforcement 16.
Attached to. Also, the lower end 8a of the pivot shaft 8
Is connected to a link member 17 connected to the actuator, and is driven to rotate.

The holder 14 has a cylindrical portion 14a and a brim portion 14b penetrating through the hole 16a of the dash reinforcement 16 and the hole 6a of the front panel 6.

The collar portion 14b has a holder rotation stopping pin 18 projecting therefrom, and a boss 14c into which a regulating pin 19 fixed to the sub arm base 11 is inserted. The pin 18 is in the small hole 16b of the dash reinforcement 16, and the boss 14c is in the dash.
Fit into the small holes 16c of the reinforcement 16 respectively.
To prevent the holder 14 from rotating, and
I'm making a decision. Also, the regulating pin 19 is
The sub arc is fitted by fitting into the small hole 6b of the panel and the boss 14c.
The rotation of the base 11 is stopped, and the positioning at the time of mounting is performed.

On the outer periphery of the cylindrical portion 14a, two screw portions 2 are provided.
0a and 20b are formed. One of the screw portions 20b is screwed with a screw portion 21a of a collar 21 that covers the screw portion 20b to firmly fix the holder 14 to the dash reinforcement 16, and a lock nut 22 is screwed into the other screw portion 20a. To fix the sub arm base 11. like this,
A structure including the pivot shaft 8, the holder 14, the collar 21, and the like is referred to as a pivot body.

The regulating pin 19 is provided with a ring 19a, which is engaged with a part of a rubber packing as a sealing member. The rubber packing is divided into a rubber packing 23 for sealing the pivot body above the sub-arm base 11 and a rubber packing 24 for positioning the pivot body below the sub-arm base 11, and the ring 19 a engages with the rubber packing 24. .

As shown in FIG. 2, the rubber packing 24 has a gourd shape as a whole, and has a collar through hole 24a on the large diameter side and a pin through hole 24b on the small diameter side. As shown in FIG. 3, a step portion 24c slightly smaller in diameter than the nut portion 21b of the collar is formed in the collar through hole 24a, and a step portion 24d slightly smaller than the ring 19a is formed in the pin through hole 24b. Also,
The skirt portion 24e of the rubber packing 24 has a size to cover from the hole 6a to the small hole 6b of the front panel 6, and the bottom is inclined so as to be in close contact with the front panel 6.

The pivot portion constructed as described above is assembled as follows. First, the holder 14 is inserted from the back surface of the dash reinforcement 16 to the front panel 6 side, and the brim-shaped portion 14b is brought into contact with the dash reinforcement 16. Then, the collar 21 is screwed and fixed to the screw portion 20b of the cylindrical portion 14a protruding above the panel 6, thereby fixing the two.

[0019] to the next, the rubber packing 24 nut portion 21 b
The regulating pin 19 is inserted into the pin through hole 24b of the packing 24 while being elastically deformed. Then, the sub-arm base 11 is fitted to the cylindrical portion 1 4 a, to secure the sub-arm base 11 by screwing fixing the lock nut 22 to the threaded portion 20a while inserting the pin 19 in the boss portion 14c of the holder 14, Thereafter, the rubber packing 23 is attached.

The rubber by a fixed sub-arm base 11 packing 24 is a nut unit 21 b and the sub arm base 11
And is strongly adhered to the front panel 6.

Further, the base of the main arm 3 is fitted to the upper end of the pivot shaft 8, a nut 10 is screwed into the screw portion 9, and the main arm 3 is fixed to the pivot shaft 8, and the cover 1 is fixed.
3 is installed.

As described above, the small hole 6b into which the regulating pin 19 provided on the front panel 6 is fitted and the hole 6a into which the holder 14 and the collar 21 are inserted are sealed by one rubber packing 24, so that the conventional rubber packing 24 is used. Like packing,
There is no interference between the packings sealing the holes, and the gap between the regulating pin 19 and the collar 21 (pivot body) can be reduced. Further, since the rubber packing 24 is not axially symmetric, the skirt portion 24e can be formed in accordance with the inclination of the front panel 6, and the adhesion to the front panel 6 is improved.

[0023]

According to the present invention, since the pivot member located on the vehicle body panel side with respect to the base member and the sealing member attached to the regulating pin fixed to the base member are integrally formed, the number of parts is small. A small pivot can be provided.

Further, by forming the seal member integrally, it is possible to give the seal member a direction at the time of mounting. Therefore, it is possible to form the seal member into a shape which can be in close contact with the vehicle body panel, Pivot sealing is improved.

Furthermore, the reduction in the number of sealing members can improve the workability when assembling the pivot itself, which leads to a reduction in manufacturing costs.

[Brief description of the drawings]

FIG. 1 shows a seal configuration of a pivot portion of a semi-pantograph wiper according to one embodiment of the present invention.
It is the elements on larger scale of A section.

FIG. 2 is a plan view of a seal member as a main part of the present invention.

FIG. 3 is a partially enlarged exploded view of a fixing portion of a seal member.

FIG. 4 is a front view showing a configuration of a semi-pantograph wiper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Semi-pantograph wiper 2 Wiper arm 2A Base of wiper arm 3 Main arm 4 Sub arm 5 Wiper blade 6,16 Body panel 8 Pivot shaft 11 Base member 13 Cover 14 Holder 19 Restriction pin 21 Collar 23,24 Seal member (rubber packing)

Claims (1)

(57) [Scope of request for utility model registration] 1. A pivot shaft base member of the sub arm in an intermediate portion is fitted with the main arm is attached to the tip portion, the base portion of the pivot shaft pivotally mounted body panel
A pivot body having a holder attached to the
A restricting pin provided on the base member and engaged with the holder via the vehicle body panel to stop rotation and position of the pivot body; and a restricting pin and a seal member mounted on the pivot body. In a seal structure of a pivot portion of a semipantograph wiper in which a wiper arm for supporting a blade includes the main arm and the sub-arm arranged in parallel with the main arm, the pivot body positioned closer to a vehicle body panel than the base member is restricted. A pivot seal structure for a semi-pantograph wiper, wherein a pin seal member is integrally formed.