JP3261395B2 - Rubber core material for wiper blade - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates is intended for example raindrops on a window glass of an automobile or the like, relates to a rubber core material for use in snow Ruwa <br/> Lee Per blade to wipe the other foreign objects, especially production is related to facilitating der Ruwa Lee Per blade rubber core.

[0002]

2. Description of the Related Art FIG. 3 is an explanatory view showing an example of a conventional wiper blade. FIG. 3 (a) is a side view of a main part, and FIG. 3 (b) is an enlarged cross section taken along line AA in FIG. In FIG.
1 is a main frame, 2 is a 2nd frame, and 3 is a 3rd frame.
The two side shapes are formed in a substantially arcuate shape, and both ends of the main frame 1 are located at the intermediate portion of the second frame 2.
And one end of the second frame 2 is connected to the center of the third frame 3 so as to be rotatable and slightly slidable in the longitudinal direction of each of the frames 1 to 3.

[0003] Reference numeral 4 denotes a grip portion, which is provided at one end of the second frame 2 and at both ends of the third frame 3.
The wiping member 5 made of a rubber material and the rubber core material 6 fitted and fixed in the wiping member 5 are formed so as to be integrally held. The grip portion 4, the wiping member 5, and the rubber core 6 are formed so as to be relatively movable in the longitudinal direction.

[0004] The wiping member 5 is provided with a storage hole 7 for storing the rubber core material 6 and a groove 8 for engaging with the locking claw 4 a of the grip portion 4 along the longitudinal direction, and a window glass. A ridge 9 that slides in contact with the body is integrally provided in the longitudinal direction. The rubber core 6 is made of an elastic metal material such as stainless steel (SUS304 or the like) and has a rectangular or rectangular cross section, so that the bending deformation in the horizontal direction is small and the vertical direction is small. To be easily deformed.

When the wiper blade is reciprocated in a direction intersecting the longitudinal direction of the wiper blade by an arm (not shown) connected to the drive source, the ridge 9 provided on the wiping member 5 is formed. Since it slides in contact with the surface of the window glass, it is possible to wipe out foreign substances such as raindrops, snow, and dust attached to the window glass, thereby securing a view.

[0006]

In the above-mentioned conventional wiper blade, the rubber core 6 has a rectangular or rectangular cross section as described above. 6 is generally formed by, for example, cold rolling from a round rod having the same diameter. However, since plastic processing such as rolling of a round bar wire is performed over the entire length of the rubber core material 6, the time and man-hour required for the processing are large, and a heat treatment for removing residual stress accompanying the processing is required. Therefore, there is a problem that the cost increases.

[0007] Even when the rubber core material 6 is manufactured from a flat wire having a rectangular or rectangular cross-section, when the rubber core material 6 is wound into a coil after rolling and heat treatment, it is twisted into a flat wire. Since the bend has occurred,
In order to secure the required straightness as the rubber core material 6, straightening is required. In particular, since the straightening of twist is complicated, there is a problem that the processing cost increases.

[0008] The present invention is to solve the problems existing in the prior art, the manufacture is easy, and to provide a reduced possibility der Ruwa Lee Per blade rubber core material of the processing cost .

[0009]

[0010]

Means for Solving the Problems To solve the above problems,
In the present invention, in the present invention, a wiping member made of a rubber material and having a ridge that slides in contact with the surface of the window glass in the longitudinal direction, and a rubber core material made of an elastic metal material and interposed in the wiping member. In a rubber core material used for a wiper blade having a frame that integrally holds the wiping member and the rubber core material, a round bar having a diameter d is used, and at a plurality of locations in the longitudinal direction of the round bar, A technical measure of providing a crushed portion by plastic deformation having a width dimension w and a thickness dimension t (where w> d, t <d) to reinforce the lateral bending strength was employed.

That is, when the above rubber core material is simply formed by a round bar having the same diameter over its entire length, the wiper blade is compared with a conventional rubber core material having a rectangular or flat rectangular cross section. The strength in the horizontal direction (moving direction of the wiper blade) is insufficient, so that the strength in the horizontal direction is sufficiently maintained, and the function of the wiper blade is secured.

[0012]

FIG. 1 is an enlarged sectional view showing an embodiment of the present invention, and corresponds to FIG. 3 (b). FIGS. 2A and 2B are main part explanatory diagrams showing a rubber core material according to the embodiment of the present invention, wherein FIG. 2A is a plan view and FIG. 2B is a side view. 1 and 2, the same parts are indicated by the same reference numerals as those in FIG.

[0013] In Figures 1 and 2, a rubber core material 6 is intended to be formed by substantially the diameter d becomes round bar, at a plurality of locations of the long-side direction, the width dimension w, the thickness t (where, w>
d, t <d), and a crushed portion 10 having a length L is provided. On the other hand, the wiping member 5 is provided with a storage hole 7 for storing the rubber core material 6. The storage hole 7 has an inner diameter substantially the same as the diameter d of the rubber core material 6 and a rubber hole. The core member 6 is formed so as to penetrate in the longitudinal direction and open a part of the core member 6 to the outer surface.

With the above configuration, the storage hole 7 of the wiping member 5
After the rubber core material 6 is inserted through the rubber member 6 and the two are integrally gripped by the grip portion 4, a wiper blade as shown in FIG. 3A is formed. In this case, since the rubber core 6 is provided with the crushed portions 10 by plastic deformation at a plurality of positions by, for example, pressing means, the horizontal bending deformation is made smaller than that formed by only the round bar having the diameter d. be able to.

[0015]

EXAMPLE A rubber core material 6 is formed of SUS304 stainless steel having a diameter of 1.6 mm, and has a total length of 450 mm in a longitudinal direction.
A crushing portion 10 having a width dimension w = 2.5 mm, a thickness dimension t = 0.8 mm, and a length dimension L ≒ 10 mm was provided at a location using a press die. As shown in FIG. 1, the rubber core material 6 was fitted and fixed in the storage hole 7 to form a wiper blade, and when used by being mounted on a wiper device for an automobile, the same performance as that of the conventional one was exhibited. I confirmed that I got it.

In this embodiment, the example in which the rubber core 6 is formed of stainless steel is described. However, the rubber core 6 may be formed of another metal material. In other words, as long as the crushed portion 10 can be formed by plastic working. Good. The width w, the thickness t, the length L, and the number of the crushed portions 10 are determined by taking into account the length of the wiping member 5, the dimensions of the rubber core 6, the number of the grips 4, and the like. It can be selected appropriately.

[0017]

Since the present invention has the construction and operation described above, a rubber core material can be manufactured from a relatively inexpensive round rod wire material, which is easy to manufacture and reduces the processing cost. The effect that can be done can be produced.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view showing an embodiment of the present invention.

FIGS. 2A and 2B are main portion explanatory views showing a rubber core material according to the embodiment of the present invention, wherein FIG. 2A is a plan view and FIG.

FIG. 3 is an explanatory view showing an example of a conventional wiper blade, in which (a) is a side surface of a main part, and (b) is AA in (a).
2 shows an enlarged cross section of the line.

[Explanation of symbols]

 5 Wiping member 6 Rubber core material 10 Crushed part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60S 1/04-1/28

Claims (1)

(57) [Claims] 1. A wiping member made of a rubber material and having a ridge that slides in contact with a surface of a window glass in a longitudinal direction; a rubber core material made of an elastic metal material and interposed in the wiping member; In a rubber core material used for a wiper blade including a member and a frame that integrally holds the rubber core material , a round bar having a diameter d is used, and a plurality of the round bars in the longitudinal direction are used. Pieces
Where width dimension w and thickness dimension t (where w> d, t <d)
A crushed part due to plastic deformation is provided to reinforce the lateral bending strength
A rubber core material for a wiper blade .