JP2003291785A - Wiper arm connection structure in wiper device - Google Patents

Abstract

(57) [Summary] [Problem] To a tip portion of an arm shank having a bottom piece portion and a pair of leg pieces extending from both side edges of the bottom piece portion in a window direction, the cross section of which is formed in a substantially zigzag shape, When connecting the long arm piece to which the wiper blade is attached to the tip, it is configured to have excellent design. A plate surface is rotated by approximately 90 degrees at a connection portion 5b of the arm piece 5 which is a connection portion with the arm shank 4,
A bent piece 5c is formed so as to be displaced toward the one leg 4b of the arm shank 4, and the bent piece is formed by using a rivet 7 along the one leg 4b. To fix and connect.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of a wiper arm connecting structure in a wiper device installed in a vehicle such as a private car, a truck or a bus.

[0002]

2. Description of the Related Art Generally, some wiper devices of this type include
Attach the wiper arm to the tip of the arm shank, which is formed in a V-shaped cross section by the bottom piece parallel to the window surface and the pair of leg pieces extending from both side edges of the bottom piece toward the window surface. It is known that a blade is configured so as to be connected to a base end portion of an elongated plate-shaped arm piece connected to the tip. In such a thing, fixing of the arm piece base end portion and the arm shank tip end portion is performed, for example,
As shown in Japanese Unexamined Patent Publication No. 9-207721, a long arm piece base end portion is arranged along an arm shank bottom piece portion,
It has been proposed to fix the laminated portion with rivets.

[0003]

However, in the prior art, the arm piece is riveted to the arm shank bottom piece, so that when the rivet head faces the outer surface of the bottom piece, that is, the wiper device from the outside. There is a problem that it is inferior in design because it is exposed on the outer surface that is the front,
Here, there is a problem to be solved by the present invention.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances in order to solve these problems, and includes a bottom piece portion parallel to a window surface and the bottom piece. Long arm in which the wiper blade is attached to the tip of the arm shank, which is composed of a pair of leg pieces extending in the direction of the window surface from both side edges When connecting the pieces to form a wiper arm, a bending piece portion is formed at a connecting portion of the arm piece with the arm shank, and the bending piece portion is fixed to one arm shank leg piece portion. To do. And by doing in this way, the member for connecting an arm piece to a bottom piece part of a wiper arm is not exposed, and designability can be improved. In this structure, the arm piece connecting portion of the present invention is provided with a bent piece portion which is rotated about 90 degrees on the plate surface and is displaced to one leg piece portion side of the arm shank, and the bent piece portion is formed on the one side. It can be fixed to the leg part of the. Further, in this, the arm piece of the present invention is fixed by a connecting pin supported on both leg pieces of the arm shank, and the connecting pin is connected to an arm head for swingably connecting the base end of the arm shank. It may be configured as a bullet receiver for connecting one ends of the biasing bullets interposed therebetween, and by doing so, dual use of members can be achieved. Further, in this, the arm piece connecting portion of the present invention is formed with a bent piece portion bent stepwise toward the window surface side, and the bent piece portion is formed on one arm shank leg piece portion. It may be fixed to a mounting piece portion extending from the window side edge portion toward the other leg piece side.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to FIG.
~ It demonstrates based on the drawing shown in FIG. In the drawing,
Reference numeral 1 denotes a pivot shaft that constitutes a wiper device, and the pivot shaft 1 is supported on a vehicle body side, and a base end portion of an arm support 2 is integrally formed with a protruding end portion that protrudes outward from the body side. It is fastened. A base end portion of an arm shank 4 forming the wiper arm 3 is pivotally supported on a tip end portion of the arm support 2 via a pin 2a orthogonal to the arm length direction, whereby the tip end portion of the arm shank 4 is supported. It is configured to be swingable in a direction away from and in contact with the window surface (window surface direction).

Reference numeral 5 denotes an arm piece which is connected to the tip end side of the arm shank 4 in order to form the wiper arm 3 in a structure as will be described later. The arm piece 5 is made of a long plate made of steel. A blade attachment portion 5a folded back to the base end side is formed at the tip portion, and a wiper blade (not shown) for wiping the window surface is set so as to be detachably attached. Here, 6 is a biasing ammunition machine interposed between the arm support 2 and the arm shank 4, and the biasing ammunition machine 6 biases the wiper arm 3 in the window surface direction to wipe the wiper arm. The blade is pressed against the window surface to perform the wiping operation, and the basic structure of each of them is the same as the conventional one.

The arm shank 4 has a bottom piece 4a which is substantially parallel to the window surface, and a pair of leg pieces extending from both side edges of the bottom piece 4a in the longitudinal direction (arm length direction) toward the window surface. 4b and 4c, the cross section is formed in a generally U-shape. The bottom piece 4a is formed to be narrower toward the tip side, while the leg pieces 4b and 4c are folded back toward the sides closer to each other on the tip side to form a predetermined gap between the bottom piece 4a and the bottom piece 4a. The folding piece portions 4d and 4e are formed so as to be substantially parallel to the bottom piece portion 4a. And the bottom piece 4a
The base end of the arm piece 5 is inserted into a rectangular space S surrounded by the two leg pieces 4b and 4c and the folded back pieces 4d and 4e and fixed by caulking.

On the other hand, the base end portion of the arm piece 5 inserted into the space S extends to an intermediate portion in the longitudinal direction of the arm shank 4, and the portion inserted into the arm shank 4 is connected to the arm shank 4. It is set in the part 5b. Then, by bending the arm piece connecting portion 5b so as to rotate approximately 90 degrees, a surface of the base end portion of the arm piece 5 that is oriented in a direction orthogonal to the plate surface on the tip side (perpendicular to the window surface direction). And a bent piece portion 5c which is in a state of being displaced toward the one leg piece portion 4b side with respect to the axial center of the arm piece 5 facing the longitudinal direction. As a result, in the state where the arm piece 5 is fixed to the arm shank 4, the tip side portion of the connection portion 5b is in contact with the inner side surface of the arm shank bottom piece portion 4a, but the connection portion 5b.
The bent piece portion 5c, which is the base end side portion, is in contact with the inner side surface of the one leg piece portion 4b.

On the other hand, 7 is a rivet (corresponding to a connecting pin of the present invention) for caulking and fixing the arm piece bending piece 5c to one leg piece 4b, and the rivet 7 has a step on the outer peripheral surface. The surface portion 7a is formed, while the leg piece portion 4b is formed.
A small diameter portion 7b is formed on the side, a large diameter portion 7c is formed on the other leg piece portion 4c, and a rivet head 7d is formed on the end portion on the large diameter portion 7c side. Then, the small-diameter portion 7b side end portion is inserted from the outside of the other leg piece portion 4d into the pin hole 4g opened in the other leg piece portion 4d, and further,
The arm piece bending piece portion 5c is inserted by sequentially inserting it into the pin hole 5d formed in the arm piece bending piece portion 5c and the pin hole 4f formed in the leg piece portion 4c, and caulking the rivet 7 in this state. Of the arm shank 4 is set so as to be fixedly connected to the arm shank 4. At this time, the stepped surface portion 7a of the pin 7 is dimensioned so as to abut against the plate surface of the arm piece bending piece portion 5c, whereby the arm shank 4 is attached to the arm shank 4 without rattling. It is fixed. Further, at this time, the rivet heads 7d and 7e at both ends of the rivet 7 are exposed to the outside on the outer surfaces of the leg pieces 4b and 4c, and the rivet heads are attached to the bottom piece 4a which is the front when the window surface is viewed from the front. It is set to never be exposed.

Then, the large-diameter portion 7c of the rivet 7 is set so that the engagement piece portion 6a on the tip end side of the urging ammunition machine 6 is locked. It is configured to function as a locking member (a connecting member and a bullet receiver) of the machine 6.

In the embodiment of the present invention constructed as described above, the arm shank 4 constituting the wiper arm 3 is formed.
The connecting portion between the arm piece 5 and the arm piece 5 is formed along the one leg portion 4b of the arm shank 4 by bending the connecting portion 5b at the base end portion of the arm piece 5 so that the plate surface rotates 90 degrees. The leg portion 4b on one side is fixed and the rivet 7 is fixed. As a result, the rivet heads 7d and 7e formed on both ends of the rivet 7 are exposed to the outside on the outer surfaces of the leg pieces 4b and 4c as described above, and are bottom pieces that are the front when the window surface is viewed from the front. The rivet head is not exposed at the portion 4a. As a result, it is possible to provide the wiper arm 3 having an excellent design without the problem that the design is inferior unlike the conventional one.

Moreover, in the present embodiment, the rivet 7 for fixing the arm piece 5 to the arm shank 4 is configured so that the engaging piece 6a on the tip end side of the biasing ammunition 6 engages. In this case, the rivet 7 is formed with the stepped surface portion 7a.
Since the step surface portion 7a is abutted against the plate surface of the arm piece 5, there is no problem that the arm piece 5 rattles against the arm shank 5.

The present invention is of course not limited to the above-mentioned embodiment, but may be modified as in the second embodiment shown in FIG. This one is armpiece 5
The bending piece portion 5c is formed by rotating the connecting portion 5b at 90 degrees, and the bending piece portion 5c is fixed using the rivet 8 along the arm shank one leg piece portion 4b. Although these configurations are the same as those of the first embodiment, in this one, the rivet 8 fixes only the arm piece bending piece 5c, and the biasing ammunition 6 is used.
The rivet 9 as an engagement receiver for engaging the engaging piece portion 6a of is fixed to the base end side of the rivet 8 for the arm piece 5. With this configuration, the rivets 8 and 9 are fixed to the leg pieces 4b and 4c, and the fixing portion is not exposed to the bottom piece 4a. Further, in this case, the arm piece 5 and the biasing ammunition 6 are configured to be supported at different parts with respect to the leg pieces 4b and 4c, respectively, so that the strength can be improved.

Next, a third embodiment will be described with reference to FIG. This is one of the leg pieces 10a and 10b forming the arm shank 10, and the one leg piece 10a on the side to which the bent piece 5c of the arm piece 5 is fixed.
While extending the window toward the window side, arm piece 1
Bending piece portion 11b formed in the connecting portion 11c on the one base end side
Is bent so as to be largely displaced toward the window surface, and the bent piece 11
The fixing portion between b and the one leg piece 10a is configured to be displaced toward the window surface side with respect to the fixing portion in the second embodiment. Incidentally, the other configurations are the same as those of the second embodiment, and with this configuration, the fixing portion of the arm piece 12 is exposed to the bottom piece portion 10c of the arm shank 10. In addition to being able to prevent this, it is possible to further improve the strength. Further, the bent piece portion 11c is connected to one leg piece portion 1
At the time of assembly for fixing to 0a, the other leg piece 10b
The caulking jig can be set in the lower part of
The caulking process becomes easier.

Further, FIG. 7 shows the fourth embodiment.
It will be described based on. In this structure, a bending piece 12b having a step-like shape is formed at the connecting portion 12a of the arm piece 12 so that the plate surface on the base end side is inclined so that the plate surface on the base end side is displaced toward the window surface side from the plate surface on the tip end side. On the other hand, of the two leg pieces 13a and 13b of the arm shank 13, the one leg piece 13a extends toward the other leg piece 13b from the edge on the side of the window surface at a portion of the leg piece 13a facing the arm piece bent piece 12b. Attaching piece 13c
Is integrally formed, the arm shank bent piece 12b is arranged along the attachment piece 13c, and the portion is caulked and fixed by the rivet 14. With such a configuration, the fixed portion of the arm piece 12 can be prevented from being exposed to the bottom piece portion 13d of the arm shank 13. Further, in this case, the rivet 15, which serves as a bullet receiver for engaging the engagement piece portion 6a of the biasing bullet 6, is fixed to the base end side of the fixing portion of the arm piece 12, and is configured in this way. You can also

[Brief description of drawings]

1A and 1B are a front view and a vertical sectional view of a wiper device, respectively.

FIG. 2 is a rear view of the wiper arm.

FIG. 3 is a perspective view of a wiper arm.

4 (A), (B), and (C) are a perspective view, a longitudinal sectional view, and XX of FIG. 4 (B) of the main part of the wiper arm, respectively.
FIG.

5 (A), (B), (C), and (D) are respectively a perspective view, a vertical cross-sectional view, and X- of FIG. 5 (B) of a main part of the wiper arm according to the second embodiment. X sectional view, FIG. 5 (B)
3 is a sectional view taken along line YY of FIG.

6 (A), (B), (C), and (D) are perspective views, longitudinal sectional views, and X- of FIG. 6 (B) of a main part of the wiper arm according to the third embodiment. X sectional view, FIG. 6 (B)
3 is a sectional view taken along line YY of FIG.

7 (A), (B), (C), and (D) are perspective views, longitudinal sectional views, and X- of FIG. 7 (B) of the main part of the wiper arm according to the fourth embodiment. X sectional view, FIG. 7 (B)
3 is a sectional view taken along line YY of FIG.

[Explanation of symbols]

1 pivot axis 2 arm support 3 Wiper arm 4 arm shank 4a Bottom piece 4b Leg piece 5 arm pieces 5b Connection site 5c bent piece 6 munitions 7 rivets

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takeo Suzuki             Gunma prefecture Kiryu city Hirosawa town             Mitsuba Co., Ltd. (72) Inventor Mamoru Kagawa             1-4-1 Chuo 1-4, Wako-shi, Saitama Stock Association             Inside Honda Research Laboratory F-term (reference) 3D025 AE06 AE22 AE31 AE40

Claims (4)

[Claims] 1. An arm shank having a bottom piece parallel to a window surface and a pair of leg pieces extending from both side edges of the bottom piece in the window surface direction, the cross section of which is formed in a generally U-shape. When a long arm piece to which a wiper blade is attached at the tip is connected to the tip end of the to form a wiper arm, a bent piece is formed at the connecting portion of the arm piece with the arm shank, and the bent piece is formed. A wiper arm connection structure in a wiper device, characterized in that one piece is fixed to one arm shank leg piece. 2. The bending piece portion according to claim 1, wherein the arm piece connecting portion is formed with a bending piece portion that is rotated about 90 degrees on the plate surface and is displaced to one leg piece portion side of the arm shank. A wiper arm connecting structure in a wiper device in which the above-mentioned one leg is fixed. 3. The arm piece according to claim 1 or 2, wherein the arm piece is fixed by a connecting pin supported by both leg pieces of the arm shank, and the connecting pin swingably connects the base end of the arm shank. A wiper arm connection structure in a wiper device configured as an ammunition receiver for connecting one end of a biasing ammunition interposed between the head and the head. 4. The arm piece connecting portion according to claim 1, wherein a bent piece portion bent in a step shape toward the window surface side is formed, and the bent piece portion is formed on one arm shank leg piece portion. Wiper arm connection structure in a wiper device fixed to a mounting piece extending from the edge of the window surface side toward the other leg piece side.