JPH0420693Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to a wiper blade used in vehicles such as automobiles, and particularly to a wiper blade suitable for use in cold regions.

《Prior art》 Wipers that wipe away water droplets adhering to the front windshield and rear windshield of automobiles, etc., consist of a wiper arm with one end fixed to the output shaft of a wiper motor installed on the vehicle body side, and this wiper arm. It generally consists of a wiper blade attached to the other end. There are various types of wiper blades, and wiper blades used in cold, snowy regions are particularly susceptible to raindrops and snow adhering to the blade elements that freeze and impede their functionality. One way to prevent this is to cover the entire levers that hold the rubber ribbon for wiping the glass surface via the ribbon holder in a bag-like manner in the longitudinal direction with one rubber cover. A wiper blade, so-called a "snow blade," is known that has a structure that prevents rain or snow from adhering to the sliding joints between the levers and a plurality of levers, and the rotating joints between the levers.

The general structure of the wiper blade is
There is something like the one shown in the figure. That is, the wiper blade 1 includes a rubber ribbon 2, a ribbon holder 3, a plurality of levers 4, 5, and 6 that hold the rubber ribbon 2 via the ribbon holder 3, and the plurality of levers 4, 5, and 6 as a whole. It has a structure including a rubber cover 7, etc., which covers it in a bag-like manner over its longitudinal direction.

As the end shape of the rubber ribbon 2 is shown in FIG. 6, a substantially T-shaped attachment portion 2D including a neck portion 2C is formed on a lip portion 2B having a wiping edge portion 2A. The end shape is substantially maintained throughout the lengthwise direction. Then, in the attachment part 2D of the rubber ribbon 2, a metal ribbon holder 3 whose cross section is formed into a substantially rectangular C-shape and whose length almost matches the length of the rubber ribbon 2 is connected to the rubber ribbon 2. Both end portions 7A, 7A of the rubber cover 7 are attached in between, and the rubber cover 7 is fixed to the rubber ribbon 2. Furthermore, locking pieces 3A are bent at both ends of the ribbon holder 3 to prevent the rubber ribbon 2 from slipping out from the ribbon holder 3.

The plurality of levers 4 , 5 , and 6 are formed in a bridge shape and have engagement holding portions 4 a at both ends that slidably hold and hold the outer circumferential surface of the ribbon holder 3 . A plurality of first levers 4 are arranged at a distance from each other, and a pair of first levers 4, 4 adjacent to each other among the plurality of first levers 4 have their respective intermediate portions rotated at both ends via a rivet shaft 8. A second lever 5 that is rotatably connected to each other, and a third lever 6 that is rotatably connected at both ends to each intermediate portion of a pair of adjacent second levers 5 via a rivet shaft 8. Become. The first, second, and third levers 4, 5, and 6 each hold the rubber ribbon 2 via the ribbon holder 3 held by the first lever 4. A bracket 9 attached from above the rubber cover 7 is fixed to approximately the middle part of the third lever 6, and a clip 10 is provided to the bracket 9 to which a stay of a wiper arm (not shown) is detachably attached. It is being

In this way, multiple levers 4, 5,
The wiper blade 1 which covers the wiper blade 6 has a cap 12 attached to an opening 11 formed at both ends thereof, and fixes the rubber cover 7 thereto.
1 to prevent water etc. from entering into the rubber cover 7.

As shown in FIG. 6 as a perspective view of the cap 12 and as shown in FIG. 8 as a vertical sectional view,
A recess 12A is provided to escape the end of the ribbon holder 3, and its longitudinal cross-sectional shape is approximately in the shape of an inverted L, and an abutment wall 12B, which is a vertical inner wall of the recess 12A, is positioned to substantially abut against the end surface of the rubber ribbon 2. It has a structure that allows it to be inserted until it is inserted. (See Figure 7).

<<Problems to be solved by the invention>> However, in the case of such a structure, gaps are likely to be formed between the cap 12 and the rubber cover 7, and between the end face of the rubber ribbon 2 and the cap 12, and the rubber Water may enter the cover 7 in some cases.

If this is between the rubber cover 7 and the cap 12, the rubber cover 7
As the cap is stretched, elasticity is generated and adhesion between the cap and the cap 12 is created, so this does not pose much of a problem in the early stages of use. However, there is a problem in that the adhesion between the rubber ribbon 2 and the cap 12 is poor from the initial stage of use, and water can enter between the two. Also, after a number of years of use, the rubber cover 7
This deteriorates the adhesion between the cap 12 and the rubber cover 7, resulting in a problem of water infiltrating between them.

When water infiltrates into the rubber cover 7 in this way, the water freezes in cold regions and is used for sliding movement between the ribbon holder 3 and the engagement holding portion 4a of the first lever 4, and for each other. There is a problem in that the rotational movement of the connecting portions of the first, second, and third levers 4, 5, and 6 is obstructed, and the wiping function of the wiper is deteriorated.

Therefore, in view of these conventional problems, the present invention was developed by
To provide a wiper blade having a structure that prevents water from penetrating into a rubber cover.

<Means for Solving the Problems> In order to achieve the above object, the present invention covers a plurality of levers that hold rubber ribbons via ribbon holders with a single rubber cover in the longitudinal direction. The wiper blade is configured to seal the opening by inserting a cap having a substantially inverted L-shape in vertical section into the opening at both ends until the vertical part thereof is positioned on the end surface of the rubber ribbon, the wiper blade having a configuration in which the opening is sealed by inserting a cap having a substantially inverted L-shape in vertical section into the opening at both ends of the wiper blade. It is characterized in that a rubber-based sealant is filled between the cap and the vertical portion.

<Operation> The wiper blade constructed as described above fills at least a rubber-based sealant between the rubber ribbon and the vertical part of the cap, which is a problem even in the early stages of use, so the sealing performance between the rubber ribbon and the cap is improved. Rainwater etc. will not enter into the rubber cover.

<<Example>> Hereinafter, one example of the wiper blade according to the present invention will be described with reference to the drawings.

FIG. 1 is a partially cutaway perspective view of a wiper blade according to the present invention.

The wiper blade 21 shown in FIG. , 26 in the longitudinal direction in the form of a bag.

As shown in the end shape of the rubber ribbon 22 in FIG.
A letter-shaped attachment portion 22D is formed, and the end shape is substantially maintained throughout the entire longitudinal direction. At the attachment portion 22D of the rubber ribbon 22, a metal ribbon holder 23 is formed with a substantially rectangular C-shape in cross section and has a length that substantially matches the length of the rubber ribbon 22.
The rubber cover 27 is attached to the rubber ribbon 22 so that both ends 27A, 27A of the rubber cover 27 are held between the rubber ribbon 22 and the rubber ribbon 22.
It is fixed at Further, bent locking pieces 23A are formed at both ends of the ribbon holder 23 to prevent the rubber ribbon 22 from slipping out from the ribbon holder 23.

The plurality of levers 24 , 25 , 26 are formed in a substantially arc shape with engagement holding portions 24 a at both ends that slidably embrace and hold the outer peripheral surface of the ribbon holder 23 . A plurality of first levers 24 arranged at a distance; a pair of first levers 2 adjacent to each other among the plurality of first levers 24;
A second lever 25 whose both ends are rotatably connected via a rivet shaft 28 to the intermediate portions of the two levers 4 and 24, and a pair of second levers 25 which are also adjacent to each other.
A third lever 26 is rotatably connected at both ends to each intermediate portion of the lever via a rivet shaft 28. The first, second, and third levers 24,
25 and 26 hold the rubber ribbon 22 via the ribbon holder 23 held by the first lever 24. A bracket 29 attached from above the rubber cover 27 is fixed to approximately the middle part of the third lever 26, and a clip 30 is provided to the bracket 29 to which a stay of a wiper arm (not shown) is detachably attached. It is being

In this way, a plurality of levers 24,
Wiper blade 21 covering 25 and 26
has a cap 3 in an opening 31 formed at both ends thereof.
2 is attached to fix the rubber cover 27 and to prevent water or the like from entering into the rubber cover 27 through the opening 31.

As shown in FIG. 2 as a perspective view of the cap 32 and as shown in FIG. 4 as a vertical cross-sectional view,
A recess 32A is provided for escaping the end of the ribbon holder 23, and its vertical cross-section has a substantially inverted L-shape, and an abutment wall 32B that forms a vertical portion on the inner wall of the recess 32A.
The structure is such that the rubber ribbon 22 is inserted until it is positioned in substantially contact with the end surface of the rubber ribbon 22.

When attaching the cap 32, the outer upper surface 32a that contacts the inner circumferential surface of the rubber cover 27 and the outer circumferential surface of the ribbon holder 23 when inserted into the opening 31, both outer side surfaces 32b, and the inside of the recess 32A are included. After applying the rubber sealant 40 to the bottom surface 32d, the cap 32 is fitted into the opening 31 until the recess 32A abuts and positions the end surface of the rubber ribbon 22. After the cap 32 is attached to the opening 31 in this manner, a rubber sealant 40 is further filled between the end surface of the rubber ribbon 22 and the cap 32 to completely seal the gap (see FIG. 3).

The wiper blade 21 with the cap 32 attached in this way includes the rubber ribbon 22 that comes into contact with the cap 32, the rubber cover 27, and the ribbon holder 2.
3 is completely sealed, so the rubber cover 27
No water can get inside.

In the above embodiment, when attaching the cap 32 to the opening 31, the cap 3 comes into contact with the inner peripheral surface of the rubber cover 27 and the outer peripheral surface of the ribbon holder 23.
A structure in which a rubber-based sealant 40 is applied in advance to the outer circumferential surface of 2 is disclosed. However, after simply inserting the waterproof cap 32 into the opening 31, when filling and sealing the gap between the end surface of the rubber ribbon 22 and the cap 32 with the rubber sealant 40, the cap 3
Apply the sealant 4 to the joint between 2 and the rubber cover 27.
0 may be applied. Further, seals other than filling and sealing the gap between the end face of the rubber ribbon 22 and the waterproof cap 32 with the rubber sealant 40 may be used as necessary.

<<Effects of the invention>> As explained above, according to the wiper blade of the invention, a rubber sealant is filled between the cap that closes both ends and the rubber ribbon, which improves the sealing performance and prevents rainwater from entering the rubber cover. This prevents the wiper's wiping function from deteriorating due to freezing in cold regions, thereby improving safety.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing an embodiment of the wiper blade of the present invention, Fig. 2 is an enlarged exploded perspective view of the main part of Fig. 1, and Fig. 3 is a view taken along arrow A-A in Fig. 1. 4 is a vertical sectional view of the waterproof cap shown in FIGS. 1 to 3, FIG. 5 is a partially cutaway perspective view showing an example of a conventional wiper blade, and FIG. 6 is a vertical sectional view of the waterproof cap shown in FIGS. Figure 7 is an enlarged exploded perspective view of the main parts of Figure 5.
8 is a longitudinal sectional view of the waterproof cap shown in FIGS. 5 and 6. FIG. 21... Wiper blade, 22... Rubber ribbon, 23... Ribbon holder, 24, 25, 26
... lever, 27 ... rubber cover, 32 ... cap, 31 ... opening, 32A ... recess, 32B ...
... Vertical end wall, 40... Rubber sealant.

Claims (1)

[Scope of utility model registration request] A plurality of levers holding a rubber ribbon through a ribbon holder are covered in a bag-like manner in the longitudinal direction with one rubber cover, and a cap having a longitudinal section approximately L-shaped is attached to the opening at both ends, and the vertical part thereof is attached to the rubber cover. The wiper blade is configured to seal the opening by being inserted until it is positioned by the end face of the ribbon, characterized in that a rubber sealant is filled between at least the rubber ribbon and the vertical portion of the cap. wiper blade.