JPS642538B2 - - Google Patents

Info

Publication number
JPS642538B2
JPS642538B2 JP55152908A JP15290880A JPS642538B2 JP S642538 B2 JPS642538 B2 JP S642538B2 JP 55152908 A JP55152908 A JP 55152908A JP 15290880 A JP15290880 A JP 15290880A JP S642538 B2 JPS642538 B2 JP S642538B2
Authority
JP
Japan
Prior art keywords
wiper blade
band
lip
wiper
neck
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP55152908A
Other languages
Japanese (ja)
Other versions
JPS5777241A (en
Inventor
Hiroshi Sugita
Tetsuji Hiramitsu
Takemasa Yasukawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyoda Gosei Co Ltd
Original Assignee
Toyoda Gosei Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyoda Gosei Co Ltd filed Critical Toyoda Gosei Co Ltd
Priority to JP55152908A priority Critical patent/JPS5777241A/en
Publication of JPS5777241A publication Critical patent/JPS5777241A/en
Publication of JPS642538B2 publication Critical patent/JPS642538B2/ja
Granted legal-status Critical Current

Links

Description

【発明の詳細な説明】 <産業上の利用分野> この発明は、ウインドシールワイパ等に使用さ
れ、ゴム又はゴム類似樹脂で成形されるワイパブ
レードに関する。 <従来の技術> 第7図に示すように、ワイパブレードは、ワイ
パホルダと係着する係着頭部1に、先端先細りの
リツプ部2が首部3を介して連結された構成で、
ウインドシールド等のガラス面4をリツプ部2の
先端エツジ2a,2bが圧接しながら往復移動可
能にワイパホルダを介して取り付けられる。この
往復移動の反転の際、リツプ部2も首部3を支点
として逆方向に反転するようになつている。 <発明が解決しようとする問題点> 一般に、ワイパは降雨時以外は使用されず、第
5〜6図に示すように、リツプ部2が屈曲して一
方側がガラス面4に押圧された状態で、長時間し
かも屋外に放置される。このため、実車装着後長
時間経過するとリツプ部2は一方側へ屈曲して大
きな永久変形を生じ、払拭角θが設定値(30〜
45゜)をはみだし払拭時下記のような不具合を生
じた。なお、6はワイパホルダである。 リツプ部2の屈曲側、すなわち、ガラス面に押
圧された側のエツジ2aで拭くと、払拭角θが設
定値より小さくなり、リツプ部2はガラス面4を
滑走し多くの拭き残りが生じ、リツプ部が反転し
て反対側のエツジ2bで拭くと、払拭角θが設定
値より大きくなり、不快音が発生するとともにび
びりが生じやはり拭き残りが生じた。 また、払拭時、ワイパブレードの首部3は、リ
ツプ部2の反転により屈曲疲労を受け、さらには
空気中のオゾン等の影響で発生するクラツクが進
行して首部3が切断するおそれがあつた。 <問題点を解決するための手段> 本発明者らは、上記問題点を解決すべく、鋭意
開発に努力した結果、従来構成のワイパブレード
において、リツプ部変形発生部位から少なくとも
係着頭部の首部との連接部位にかけて、かつ長手
方向においては全長にわたり、高分子繊維製の織
布で形成された帯布を埋設すればよいことに想到
し本発明を完成した。 <実施例> 以下、この発明の実施例を、図例に基づいて説
明する。 第1図はこの発明の一例を示し、係着頭部1に
リツプ部2が首部3を介して連結されている従来
のワイパブレードにおいて、対称軸位置に、高さ
方向及び長手方向の全長−リツプ部の変形発生部
位を含む−にわたり帯布(帯状補強部材)5を埋
設したものである。 このワイパブレードの成形材料としての高分子
弾性体には、NR、NR/CR、EPDM等のゴム、
又は、ウレタンエラストマー、ポリエステルエラ
ストマー、軟質塩化ビニル等のゴム類似樹脂があ
る。また、ワイパブレードの首部3の肉厚は0.5
〜1.0mm、リツプ部2の先端肉厚は0.7〜1.5mmとす
る。 上記帯布は、高分子繊維製の織布で形成し、30
〜150Dの繊維を用い、0.05〜0.3mmの厚みに平織
したものが望ましい。使用繊維は、ナイロン、ポ
リエステル等の合成繊維、木綿等の天然繊維が例
示できる。また、帯布はワイパブレードの弾性材
料との接着力向上のため、イソシアネート系、ク
ロロプレン系、RFL系等の接着剤を塗布して使
用してもよい。 上記ワイパブレードの製造は、圧縮成形又は押
出成形により行なう。 圧縮成形の場合は、未加硫ゴムシート+帯布+
未加硫ゴムシートのサンドイツチ材を作り、金型
へ未加硫ゴム面が当たるように入れ、圧縮、加
熱、加硫の各工程を経て製品を得る。 押出成形の場合は、押出成形機を用い、リボン
状の帯布をヘツドの中へ通し、ゴム材料と同時押
出し加硫した後、所定長に切断して製品を得る。 なお、上記において、第2図に示すように、上
下端末に帯布5が露出しないように幅を狭くして
埋設してもよく、また、使用状況から考えて、常
にかたよつた荷重がワイパブレードにかかるとき
は、第3図に示すように、帯布の埋設位置をずら
せることが望ましい。 上記ワイパブレードは、従来と同様ワイパホル
ダに取り付けてウインドシール等のガラス面を払
拭するために用いる。 このとき、リツプ部2が屈曲して一方側がガラ
ス面4に押圧された状態で、長時間しかも屋外に
放置されることが多いが、リツプ部2に帯布5が
埋設されているので、リツプ部2にかかる応力に
打ち勝ち、すぐれた耐変形性を示し永久変形量が
小さい。これは、繊維は弾性体に比して非常に高
い抗張力をもつているためである。 また、払拭時、ワイパブレードの首部3はリツ
プ部2の反転により屈曲疲労を受け、さらには空
気中のオゾン等の影響で、クラツク等が生じる
が、首部3にも帯布5が埋設されているので、首
部3の肉厚が0.5〜1.0mmと薄くてもクラツクが進
行して首部3が切断するおそれがない。これは、
帯布を構成する繊維が、耐屈曲性に優れ、また、
耐オゾン性も優れているためである。 第4図は、この発明の別の実施例を示し、2枚
の帯布を縦方向全長にわたり、埋設したものであ
る。これは、ワイパホルダのワイパブレードに対
する押圧力(いわゆるアーム圧)が高いときに効
果的である。 この実施例の成形は、ゴム糊処理帯布+未加硫
ゴムシート+ゴム糊処理帯布のサンドイツチ材を
作り金型へ入れて、圧縮、加熱、加硫工程を経て
行なう。 <発明の効果> この発明のワイパブレードは、リツプ部におけ
る高さ方向の変形発生部位から少なくとも係着頭
部の首部との連接部位にかけて、かつ長手方向の
全長にわたり、高分子繊維製の織布で形成された
帯布が埋設されている構成により、下記のような
効果を奏する。 (a) 屈曲してリツプ部一方側がガラス面に押圧さ
れた状態で、長時間しかも屋外に放置されて
も、リツプ部に大きな永久変形を生じることは
なく、長期間良好な払拭作用を奏する。 (b) ワイパブレードの首部が、リツプ部の反転に
より屈曲疲労を受け、さらには空気中のオゾン
等の影響で発生するクラツクが進行しても、首
部が切断するおそれがない。 なお、従来技術としては、丸窓等における払拭
面積を増大させるために、リツプ部に弾性を有す
る金属部材(帯状補強部材)を部分埋設する技術
的思想(実開昭52−60043号)や、リツプ部の長
手方向に湾曲弾性を、高さ方向に剛性を持たせる
ように波状の鋼線(帯状補強部材)を部分埋設し
た技術的思想(実開昭52−17433号)がある。し
かし、これらの帯状補強部材は、長手方向におい
ては湾曲弾性を有し変形に追従する作用を奏する
も、高さ方向においては剛性を有し変形を阻止す
る作用を奏する。従つて、これらの帯状補強部材
は、本願発明の帯布のように、リツプ部における
高さ方向の変形発生部位から少なくとも係着頭部
の首部との連接部位にかけて埋設することはでき
ない。即ち、従来技術のような帯状補強部材を、
高さ方向において同様の部位に埋設すると、当然
のことながらワイパブレードはリツプ部のガラス
面へ追従変形が不能となり、また首部の屈曲変形
も不能となる。 次に、この発明の効果を確認するために、この
発明の第1図に示すワイパブレード(実施例)
と、第1図に示すのと同一形状の従来のワイパブ
レード(比較例)について行なつた耐変形試験の
結果を第1表に示す。 試験方法は、実施例及び比較例のワイパブレー
ドをワイパホルダに装着し、平板ガラス面上に載
せ、30g/cm(実車の約2倍)の荷重をかけ、恒
温槽中に80℃×72h放置後、取り出して放冷し、
荷重を取り除いたときの初めのリツプ形状に対す
る変形量を角度で表わした。 第1表の結果から、実施例は比較例に比して格
段と永久変形量が小さいことがわかる。 なお、このようにワイパブレードのリツプ部の
変形発生部位に高分子繊維製の織布で形成された
帯布を埋設すると優れた特性を示すことが判明し
たが、ゴムの補強のために繊維を使用すること
は、タイマ、ベルト、ホース、ダイヤフラム等で
公知である。しかし、ワイパブレードについて
は、従来、布、繊維を埋設したものはない。これ
は、繊維等によりゴムを補強すると硬くなり、ワ
イパブレードのように、ガラス面に柔軟に追従す
ることを要求されているものへの適応は不可能で
あるとの先入観があつたためである。ゴムを繊維
で補強すると硬くなるのは事実であるが、試験研
究の結果、繊維の太さ、布の厚さを前記例示の範
囲で適度に選んでやれば、実用上ガラス面への追
従性は問題がないことがわかつた。 また、通常ウインドシールドのガラス面は曲面
を有しており、ブレード払拭角は平面の場合に比
して、格段と設置値の幅が制限され、この発明の
ワイパブレードを適用したとき、払拭性能に関し
てさらに従来品との差が生じる。 【表】
DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a wiper blade that is used for wind seal wipers and the like and is molded from rubber or rubber-like resin. <Prior Art> As shown in FIG. 7, a wiper blade has a configuration in which a lip portion 2 with a tapered tip is connected via a neck portion 3 to an engaging head 1 that engages with a wiper holder.
The tip edges 2a and 2b of the lip portion 2 are attached via a wiper holder so as to be movable back and forth while pressing against a glass surface 4 of a windshield or the like. When this reciprocating movement is reversed, the lip portion 2 is also reversed in the opposite direction using the neck portion 3 as a fulcrum. <Problems to be Solved by the Invention> Generally, wipers are not used except when it rains, and as shown in FIGS. , left outdoors for long periods of time. For this reason, after a long period of time has passed after installation on an actual vehicle, the lip portion 2 will bend to one side and undergo a large permanent deformation, causing the wiping angle θ to change to the set value (30~
45°) protruded and caused the following problems when wiping. Note that 6 is a wiper holder. When wiping with the bent side of the lip portion 2, that is, the edge 2a of the side pressed against the glass surface, the wiping angle θ becomes smaller than the set value, the lip portion 2 slides on the glass surface 4, and a large amount of wiping remains. When the lip portion was reversed and wiped with the edge 2b on the opposite side, the wiping angle θ became larger than the set value, an unpleasant sound was generated, vibrations were generated, and some residue was left after wiping. Further, during wiping, the neck portion 3 of the wiper blade is subjected to bending fatigue due to the reversal of the lip portion 2, and furthermore, there is a risk that the neck portion 3 may be severed due to cracks occurring due to the influence of ozone in the air. <Means for Solving the Problems> In order to solve the above-mentioned problems, the present inventors have made extensive efforts in development, and as a result, in wiper blades with a conventional configuration, at least the part of the attached head is removed from the area where lip deformation occurs. The present invention was completed based on the idea that it would be sufficient to embed a band made of a woven fabric made of polymeric fibers over the entire length in the longitudinal direction and over the area where it connects to the neck. <Example> Hereinafter, an example of the present invention will be described based on illustrated examples. FIG. 1 shows an example of the present invention, in which a conventional wiper blade in which a lip part 2 is connected to a retaining head 1 through a neck part 3 is arranged at a symmetrical axis position, and has a total length in the height direction and longitudinal direction. A band cloth (band-shaped reinforcing member) 5 is embedded over the area including the deformed portion of the lip portion. The polymer elastomer used as the molding material for this wiper blade includes rubbers such as NR, NR/CR, and EPDM.
Alternatively, there are rubber-like resins such as urethane elastomer, polyester elastomer, and soft vinyl chloride. Also, the thickness of the wiper blade neck 3 is 0.5
~1.0mm, and the thickness of the tip of the lip portion 2 is 0.7~1.5mm. The above band cloth is made of woven fabric made of polymer fiber, and
It is preferable to use ~150D fibers and plain weave to a thickness of 0.05~0.3mm. Examples of the fibers used include synthetic fibers such as nylon and polyester, and natural fibers such as cotton. Further, the band cloth may be coated with an adhesive such as isocyanate-based, chloroprene-based, RFL-based, etc. in order to improve the adhesive force with the elastic material of the wiper blade. The above wiper blade is manufactured by compression molding or extrusion molding. For compression molding, unvulcanized rubber sheet + banding cloth +
Sandwich materials of unvulcanized rubber sheets are made, placed into a mold with the unvulcanized rubber side in contact with each other, and the product is obtained through compression, heating, and vulcanization processes. In the case of extrusion molding, a ribbon-shaped band is passed through a head using an extrusion molding machine, co-extruded with a rubber material, vulcanized, and then cut into a predetermined length to obtain a product. In the above case, as shown in Fig. 2, the width may be narrowed and buried so that the band cloth 5 is not exposed at the upper and lower ends. When it is placed on the blade, it is desirable to shift the buried position of the band, as shown in Fig. 3. The wiper blade is attached to a wiper holder and used for wiping a glass surface such as a wind seal, as in the conventional case. At this time, the lip part 2 is bent and one side is pressed against the glass surface 4 and is often left outdoors for a long time. It overcomes the stress applied to part 2, exhibits excellent deformation resistance, and has a small amount of permanent deformation. This is because fibers have a much higher tensile strength than elastic bodies. Furthermore, during wiping, the neck portion 3 of the wiper blade is subject to bending fatigue due to the inversion of the lip portion 2, and cracks occur due to the influence of ozone in the air. Therefore, even if the wall thickness of the neck portion 3 is as thin as 0.5 to 1.0 mm, there is no risk that the crack will progress and the neck portion 3 will be severed. this is,
The fibers that make up the obi cloth have excellent bending resistance, and
This is because it also has excellent ozone resistance. FIG. 4 shows another embodiment of the present invention, in which two strips of cloth are embedded over the entire length in the vertical direction. This is effective when the pressing force of the wiper holder against the wiper blade (so-called arm pressure) is high. The molding in this embodiment is carried out by making a sandwich material consisting of a rubber glue treated band, an unvulcanized rubber sheet, and a rubber glue treated band, putting it into a mold, and performing compression, heating, and vulcanization steps. <Effects of the Invention> The wiper blade of the present invention is made of a woven fabric made of polymeric fibers, extending from the site where deformation occurs in the height direction in the lip portion to at least the connecting portion with the neck portion of the anchoring head, and over the entire length in the longitudinal direction. The configuration in which the band fabric formed from the above is embedded provides the following effects. (a) Even if it is bent and left outdoors for a long time with one side of the lip pressed against the glass surface, the lip will not suffer any major permanent deformation and will provide good wiping action for a long period of time. (b) Even if the neck of the wiper blade undergoes bending fatigue due to the reversal of the lip, and further cracks occur due to the influence of ozone in the air, etc., there is no risk of the neck being severed. In addition, as a conventional technique, there is a technical idea (Utility Model Application Publication No. 52-60043) in which an elastic metal member (band-shaped reinforcing member) is partially embedded in the lip part in order to increase the wiping area of round windows, etc. There is a technical idea (Utility Model Application Publication No. 17433/1983) in which a wavy steel wire (band-shaped reinforcing member) is partially buried so as to provide bending elasticity in the longitudinal direction of the lip part and rigidity in the height direction. However, although these band-shaped reinforcing members have bending elasticity in the longitudinal direction and function to follow deformation, they have rigidity in the height direction and function to prevent deformation. Therefore, unlike the band fabric of the present invention, these band-shaped reinforcing members cannot be buried from the site where deformation occurs in the height direction in the lip portion to at least the connection portion with the neck portion of the fastening head. That is, the belt-shaped reinforcing member as in the prior art,
If the wiper blade is buried in the same location in the height direction, the wiper blade will naturally be unable to deform to follow the glass surface of the lip portion, and the neck portion will also be unable to bend. Next, in order to confirm the effects of this invention, the wiper blade (example) shown in FIG.
Table 1 shows the results of a deformation resistance test conducted on a conventional wiper blade (comparative example) having the same shape as shown in FIG. The test method was to attach the wiper blades of the examples and comparative examples to a wiper holder, place them on a flat glass surface, apply a load of 30 g/cm (approximately twice that of the actual vehicle), and leave them in a constant temperature bath at 80°C for 72 hours. , take it out and let it cool,
The amount of deformation relative to the initial lip shape when the load is removed is expressed as an angle. From the results in Table 1, it can be seen that the amount of permanent deformation in the Examples is much smaller than that in the Comparative Examples. It has been found that embedding a band made of woven polymer fiber fabric in the deformation area of the lip of the wiper blade exhibits excellent properties. Uses are known in timers, belts, hoses, diaphragms, etc. However, conventional wiper blades do not have cloth or fiber embedded in them. This was because there was a preconception that if rubber was reinforced with fibers, it would become hard, making it impossible to apply it to items such as wiper blades that are required to flexibly follow glass surfaces. It is true that rubber becomes harder when reinforced with fibers, but as a result of testing and research, we found that if the thickness of the fibers and the thickness of the cloth are selected appropriately within the above-mentioned ranges, it will practically conform to the glass surface. It turned out that there was no problem. In addition, the glass surface of a windshield usually has a curved surface, and the blade wiping angle is much more limited in installation value than in the case of a flat surface.When the wiper blade of this invention is applied, the wiping performance is There are further differences with conventional products. 【table】

【図面の簡単な説明】[Brief explanation of the drawing]

第1〜4図はこの発明のワイパブレードの各実
施例を示す断面図、第5図はワイパ不使用時の装
着状態斜視図、第6図は第5図の部拡大図、第
7図は従来のワイパブレードの払拭時の断面図で
ある。 1……係着頭部、2……リツプ部、3……首
部、4……ガラス面、5……帯布、6……ワイパ
ホルダ。
1 to 4 are cross-sectional views showing each embodiment of the wiper blade of the present invention, FIG. 5 is a perspective view of the wiper when it is not in use, FIG. 6 is an enlarged view of a portion of FIG. 5, and FIG. FIG. 3 is a cross-sectional view of a conventional wiper blade during wiping. 1... Attachment head, 2... Lip part, 3... Neck part, 4... Glass surface, 5... Band cloth, 6... Wiper holder.

Claims (1)

【特許請求の範囲】 1 ワイパホルダと係着する係着頭部に、先端先
細りのリツプ部が首部を介して連結された、高分
子弾性体製のワイパブレードにおいて、 前記リツプ部における高さ方向の変形発生部位
から少なくとも前記係着頭部の首部との連接部位
にかけて、かつ長手方向の全長にわたり、高分子
繊維製の織布で形成された帯布が埋設されている ことを特徴とするワイパブレード。
[Scope of Claims] 1. A wiper blade made of a polymeric elastic material, in which a lip portion with a tapered tip is connected via a neck portion to an engaging head portion that engages with a wiper holder, comprising: A wiper blade characterized in that a band made of a woven fabric made of polymeric fiber is embedded from the deformation occurrence site to at least the connection site with the neck of the anchoring head and over the entire length in the longitudinal direction. .
JP55152908A 1980-10-30 1980-10-30 Wiper blade Granted JPS5777241A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55152908A JPS5777241A (en) 1980-10-30 1980-10-30 Wiper blade

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55152908A JPS5777241A (en) 1980-10-30 1980-10-30 Wiper blade

Publications (2)

Publication Number Publication Date
JPS5777241A JPS5777241A (en) 1982-05-14
JPS642538B2 true JPS642538B2 (en) 1989-01-17

Family

ID=15550763

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55152908A Granted JPS5777241A (en) 1980-10-30 1980-10-30 Wiper blade

Country Status (1)

Country Link
JP (1) JPS5777241A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009001043A1 (en) 2009-02-20 2010-08-26 Robert Bosch Gmbh Wiper blade for a windscreen wiper and method for its production

Also Published As

Publication number Publication date
JPS5777241A (en) 1982-05-14

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