JPH106931A - Wiper blade and rubber core material for wiper blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the manufacture of a wiper blade and reduce machining cost by forming a rubber core material by a round bar and fitting and fixing a wiping member into a storage hole provided in the longitudinal direction. SOLUTION: A rubber core material 6 is substantially formed into a round bar having a diameter d, and a pressure crushed part 10 having the width w, the thickness t, and the thickness L is provided in the longitudinal direction. A storage hole for storing the rubber core material 6 is provided in the wiping member. The storage hole is formed in such a manner that its inside diameter is substantially the same as the diameter d of the rubber core material 6 and is formed in such a manner that it passes through in the longitudinal direction and a part of it is opened on an outer surface. The rubber core material 6 is inserted into the storage hole of the wiping member and is gripped integrally by a grip part to form a wiper blade. Consequently, it is possible to facilitate the manufacture of the wiper blade and reduce machining cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper blade for wiping raindrops, snow, and other foreign matters adhered to a window glass of an automobile or the like, and a rubber core material used for the wiper blade. The present invention relates to an easy wiper blade and a rubber core material for the wiper blade.

[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 rubber core material 6 is in the vertical direction. 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, it is twisted into a flat wire after being rolled and heat-treated. 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.

An object of the present invention is to provide a wiper blade and a rubber core material for the wiper blade which can solve the problems existing in the prior art described above, can be easily manufactured, and can reduce the processing cost. I do.

[0009]

According to a first aspect of the present invention, there is provided 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 wiper blade comprising an elastic metal material and having a rubber core material interposed in the wiping member, and a frame integrally gripping the wiping member and the rubber core material, wherein the rubber core material has a diameter d substantially. In addition, a technical means was adopted in which the rubber core material was formed in a round bar, and the rubber core material was fitted and fixed in a storage hole provided in the wiping member in the longitudinal direction.

Next, in the second 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 wiping member made of an elastic metal material and interposed in the wiping member In a rubber core material used for a wiper blade provided with a rubber core material and a frame for integrally holding the wiping member and the rubber core material, a round bar having a diameter d is used, and a longitudinal direction of the round bar is used. A technical means of providing a crushed portion by plastic deformation having a width dimension w and a thickness dimension t (where w> d, t <d) at a plurality of locations 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. When the strength in the horizontal direction (moving direction of the wiper blade) is insufficient, the strength in the horizontal direction is sufficiently maintained to secure the function of the wiper blade.

[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.

In FIG. 1 and FIG. 2, the rubber core material 6 is formed of a round bar having a diameter d substantially. In some cases, a width dimension w and a thickness dimension t are provided at a plurality of locations in the longitudinal direction.
(However, w> d, t <d) and the 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. It is formed so as to penetrate in the longitudinal direction of the core material 6 and open a part of the core material 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 material 6 is provided with the crushed portions 10 by plastic deformation at a plurality of places by, for example, pressing means, the horizontal bending deformation is made smaller than that formed only by the round bar having the diameter d. be able to.

[0015]

EXAMPLE A rubber core material 6 was formed of SUS304 stainless steel having a diameter of 1.6 mm and had 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 in an automobile wiper device, it exhibited the same performance as the conventional one. I confirmed that I got it.

In the present embodiment, an example in which the rubber core material 6 is formed of stainless steel is described. However, the rubber core material 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 gripping portions 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

Claims (2)

[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; A wiper blade having a frame for integrally holding a member and a rubber core material, wherein the rubber core material is formed by a round bar having a substantially diameter d, and the rubber core material is provided on the wiping member in a longitudinal direction. A wiper blade fitted and fixed in a storage hole. 2. 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 provided with a frame for integrally holding a member and a rubber core material, a round bar having a diameter d is used, and a width dimension w is provided at a plurality of positions in the longitudinal direction of the round bar. , Thickness t (where w> d, t <d)
A rubber core material for a wiper blade, characterized in that a crushed portion due to plastic deformation is provided to reinforce lateral bending strength.