JP3920509B2

JP3920509B2 - Automatic tension adjusting device for parking brake cable

Info

Publication number: JP3920509B2
Application number: JP27042999A
Authority: JP
Inventors: 弘明都築
Original assignee: Toyoda Iron Works Co Ltd
Current assignee: Toyoda Iron Works Co Ltd
Priority date: 1999-09-24
Filing date: 1999-09-24
Publication date: 2007-05-30
Anticipated expiration: 2019-09-24
Also published as: JP2001088685A

Abstract

PROBLEM TO BE SOLVED: To simply and compactly constitute a tensile force automatic adjuster adjusting tensile forces of parking brake cables branched to left/right wheels to a prescribed dimension, of small numbers of components. SOLUTION: A pair of engagement teeth 56, 58 are provided in a slide rod 52 connected to an operation member side of a parking brake approximately symmetric about a central line S, while a frame 54 is provided with a pair of poles 60, 62 to be engaged with the engagement teeth 56, 58, cables 20, 22 connected to the left/right wheels are connected to the pair of poles 60, 62, and one pole 60 or 61 climbs over one engagement tooth 56 or 58 by the change in pose of the frame 54 caused by unbalance of the tensile forces of the cables 20, 22 so that the tensile forces of the cables 20, 22 become approximately equal to each other.

Description

【０００１】
【発明の属する技術分野】
本発明はパーキングブレーキケーブルの張力自動調整装置に係り、特に、左右の車輪へ分岐したパーキングブレーキケーブルの張力を所定の大きさに自動調整する部品点数が少ない簡単で且つコンパクトな張力自動調整装置に関するものである。
【０００２】
【従来の技術】
(a) パーキングブレーキケーブルによって伝達される引張力の伝達経路に、その引張力による引張方向と略平行な一直線方向の相対移動可能に配設された第１連結部材および第２連結部材と、(b) 前記第１連結部材に前記一直線方向に沿って設けられた多数の噛合歯と、(c) 前記一直線方向と略直角な支持軸の軸心まわりの回動可能に前記第２連結部材に取り付けられて前記噛合歯と噛み合わされ、前記引張方向へその第２連結部材と前記第１連結部材とが相対移動することを阻止することにより、それ等の連結部材間でその引張力を伝達するとともに、その引張方向と反対の張力調整方向へそれ等の連結部材が相対移動することを許容する噛合部材と、(d) 前記第１連結部材と前記第２連結部材とに跨がって配設され、前記張力調整方向へそれ等の連結部材が相対移動するように付勢する張力調整用付勢装置と、を有し、(e) パーキングブレーキの解除時に前記第１連結部材および前記第２連結部材が前記張力調整用付勢装置の付勢力に従って前記張力調整方向へ相対移動させられることにより、前記パーキングブレーキケーブルの張力を自動的に調整する張力自動調整装置が知られている。
【０００３】
図３は、実開平１−６８９７０号公報に記載されているパーキングブレーキケーブルの張力自動調整装置を示す図で、(a) は斜視図、(b) は縦断面図である。この張力自動調整装置８は、パーキングブレーキ操作レバー等の操作部材に連結される第１パーキングブレーキケーブル１０の他端に連結されるスライドロッド１２と、そのスライドロッド１２が軸方向の相対移動可能に挿通させられる筒形状のフレーム１４とを備えている。フレーム１４には、相対移動方向（図３の左右方向）である一直線方向と直角な支持ピン１６を介してイコライザアッセンブリ１８が取り付けられ、左右の車輪に配設されたパーキングブレーキに連結される第２、第３のパーキングブレーキケーブル２０、２２が連結されるようになっている。この場合は、図３の左右へ離間する方向、具体的にはスライドロッド１２が左方向へ引っ張られ、フレーム１４が右方向へ引っ張られる方向が、パーキングブレーキケーブル１０、２０、２２によって伝達される引張力の方向である。また、第２、第３のパーキングブレーキケーブル２０、２２は、車輪側パーキングブレーキケーブルである。
【０００４】
スライドロッド１２の横断面は長方形で、その一側面には一直線方向（相対移動方向）に沿って多数の噛合歯２４が設けられている一方、フレーム１４には、その噛合歯２４と噛み合わされる噛合部材２６が取り付けられており、それ等の噛合いによってスライドロッド１２とフレーム１４とが引張方向へ相対移動することが阻止され、それ等の間で引張力が伝達される。噛合部材２６は、フレーム１４に一直線方向（相対移動方向）と略直角なピン２８の軸心まわりの回動可能に取り付けられた一対のアーム３０の先端部に配設されているとともに、板ばね３２によって噛合歯２４と噛み合う方向に付勢されている。また、引張方向と反対の張力調整方向の相対移動は、板ばね３２の付勢力に抗して噛合部材２６が噛合歯２４を乗り越えることによって許容される。スライドロッド１２は第１連結部材に相当し、フレーム１４は第２連結部材に相当し、ピン２８は支持軸に相当する。
【０００５】
一方、スライドロッド１２の後端部にはばね受け３４が設けられ、フレーム１４との間に圧縮コイルスプリング３６が配設されており、両者が前記張力調整方向へ相対移動するように付勢している。したがって、ケーブルの伸びやパーキングブレーキの摩耗などで、パーキングブレーキ解除時におけるパーキングブレーキケーブル１０、２０、２２の張力が低下すると、圧縮コイルスプリング３６の付勢力に従ってスライドロッド１２およびフレーム１４が張力調整方向へ相対移動させられ、噛合部材２６が噛合歯２４を乗り越えることにより、それ等のスライドロッド１２およびフレーム１４の相対位置が１個の噛合歯２４の分だけ変化させられる。これにより、パーキングブレーキ解除時におけるパーキングブレーキケーブル１０、２０、２２の張力が、圧縮コイルスプリング３６の付勢力に応じた所定値に自動的に調整され、パーキングブレーキ操作部材の操作量が所定の範囲内に維持される。第２、第３のパーキングブレーキケーブル２０、２２は、イコライザアッセンブリ１８が支持ピン１６まわりに回動させられることにより、略等しい張力に調整される。圧縮コイルスプリング３６は、張力調整用付勢装置に相当する。
【０００６】
また、上記張力自動調整装置８には、スライドロッド１２とフレーム１４との相対移動を阻止するロックピン３８が着脱可能に配設され、パーキングブレーキケーブル１０、２０、２２を連結する前に、圧縮コイルスプリング３６の付勢力に従って両者が張力調整方向へ相対移動することを阻止するようになっている。
【０００７】
【発明が解決しようとする課題】
しかしながら、このような従来の張力自動調整装置においては、フレーム１４に支持ピン１６まわりの回動可能にイコライザアッセンブリ１８が取り付けられ、そのイコライザアッセンブリ１８に第２、第３のパーキングブレーキケーブル２０、２２が連結されるようになっているため、部品点数が多くて構造が複雑で大掛かりになり、製造コストが高くなるという問題があった。
【０００８】
本発明は以上の事情を背景として為されたもので、その目的とするところは、左右の車輪へ分岐したパーキングブレーキケーブルの張力を所定の大きさに調整する張力自動調整装置を少ない部品点数で簡単且つコンパクトに構成することにある。
【０００９】
【課題を解決するための手段】
かかる目的を達成するために、第１発明は、(a) パーキングブレーキケーブルによって伝達される引張力の伝達経路に、その引張力による引張方向と平行な一直線方向の相対移動可能に配設された第１連結部材および第２連結部材と、(b) 前記第１連結部材に前記一直線方向に沿って設けられた多数の噛合歯と、(c) 前記第２連結部材に回動可能に取り付けられて前記噛合歯と噛み合わされ、前記引張方向へその第２連結部材と前記第１連結部材とが相対移動することを阻止することにより、それ等の連結部材間でその引張力を伝達するとともに、その引張方向と反対の張力調整方向へそれ等の連結部材が相対移動することを許容する噛合部材と、(d) 前記第１連結部材と前記第２連結部材とに跨がって配設され、前記張力調整方向へそれ等の連結部材が相対移動するように付勢する張力調整用付勢装置と、を有し、(e) パーキングブレーキの解除時に前記第１連結部材および前記第２連結部材が前記張力調整用付勢装置の付勢力に従って前記張力調整方向へ相対移動させられることにより、前記パーキングブレーキケーブルの張力を自動的に調整する張力自動調整装置において、(f) 前記多数の噛合歯は、前記一直線方向と平行な中心線を挟んで一対設けられている一方、(g) 前記噛合部材は、一対設けられて一対の支持軸によりそれぞれ支持され且つ前記一対の噛合歯と噛み合わされるとともに、それぞれに左右の車輪のパーキングブレーキに連結された車輪側パーキングブレーキケーブルが連結されて、前記引張力により前記支持軸まわりにおいてその噛合歯と噛み合う方向へ回動させられるようになっており、(h) その一対の噛合部材が配設された前記第２連結部材は、前記一対の支持軸が前記一直線方向へ相対移動するように姿勢変化することが許容されており、その第２連結部材の姿勢変化によって前記一対の車輪側パーキングブレーキケーブルの張力が調整されることを特徴とする。
【００１０】
第２発明は、第１発明のパーキングブレーキケーブルの張力自動調整装置において、 (a) 前記一対の噛合歯は、前記中心線に対して外向きに設けられている一方、 (b) 前記一対の噛合部材は、それぞれ前記中心線に対して前記噛合歯よりも外側の位置で前記支持軸により回動可能に支持されているとともに、前記一直線方向においてその支持軸から前記車輪側パーキングブレーキケーブルの引張力で引っ張られる方向へ変位した位置で前記噛合歯と噛み合わされるもので、その支持軸よりも更に外側の位置でその車輪側パーキングブレーキケーブルと連結されていることを特徴とする。
【００１１】
第３発明は、第１発明または第２発明のパーキングブレーキケーブルの張力自動調整装置において、前記一対の噛合部材には、それぞれ操作部が設けられ、その一対の操作部がそれぞれ前記中心線側へ接近するように把持されることにより前記噛合歯との噛合いが解除されるようになっていることを特徴とする。
【００１２】
第４発明は、(a) パーキングブレーキケーブルによって伝達される引張力の伝達経路に、その引張力による引張方向と平行な一直線方向の相対移動可能に配設された第１連結部材および第２連結部材と、(b) 前記第１連結部材に前記一直線方向に沿って設けられた係合部と、(c) その係合部から所定寸法だけ離間して配設された支持軸の軸心まわりの回動可能に前記第２連結部材に取り付けられて、前記一直線方向においてその支持軸から一方へ変位した位置でその係合部と係合させられ、その変位方向へその係合部が相対移動することを許容しつつ逆方向へ相対移動することを阻止することにより、前記引張方向へその第２連結部材と前記第１連結部材とが相対移動することを阻止し、それ等の連結部材間でその引張力を伝達するとともに、その引張方向と反対の張力調整方向へそれ等の連結部材が相対移動することを許容する係止部材と、(d) 前記第１連結部材と前記第２連結部材とに跨がって配設され、前記張力調整方向へそれ等の連結部材が相対移動するように付勢する張力調整用付勢装置と、を有し、(e) パーキングブレーキの解除時に前記第１連結部材および前記第２連結部材が前記張力調整用付勢装置の付勢力に従って前記張力調整方向へ相対移動させられることにより、前記パーキングブレーキケーブルの張力を自動的に調整する張力自動調整装置において、(f) 前記係合部は、前記一直線方向と平行な中心線を挟んで一対設けられている一方、(g) 前記係止部材は、一対設けられて一対の支持軸によりそれぞれ支持され且つ前記一対の係合部と係合させられるとともに、それぞれに左右の車輪のパーキングブレーキに連結された車輪側パーキングブレーキケーブルが連結されて、前記引張力により前記支持軸まわりにおいてその係合部と係合する方向へ回動させられるようになっており、(h) その一対の係止部材が配設された前記第２連結部材は、前記一対の支持軸が前記一直線方向へ相対移動するように姿勢変化することが許容されており、その第２連結部材の姿勢変化によって前記一対の車輪側パーキングブレーキケーブルの張力が調整されることを特徴とする。
【００１３】
第５発明は、第４発明のパーキングブレーキケーブルの張力自動調整装置において、 (a) 前記一対の係合部は、前記中心線に対して外向きに設けられている一方、 (b) 前記一対の係止部材は、それぞれ前記中心線に対して前記係合部よりも外側の位置で前記支持軸により回動可能に支持されているとともに、前記一直線方向においてその支持軸から前記車輪側パーキングブレーキケーブルの引張力で引っ張られる方向へ変位した位置で前記係合部と係合させられるもので、その支持軸よりも更に外側の位置でその車輪側パーキングブレーキケーブルと連結されていることを特徴とする。
【００１４】
【発明の効果】
第１発明のパーキングブレーキケーブルの張力自動調整装置においては、第１連結部材には中心線を挟んで一対の噛合歯が設けられる一方、第２連結部材には、その噛合歯と噛み合うように一対の噛合部材が設けられて、左右の車輪に連結された一対の車輪側パーキングブレーキケーブルがその一対の噛合部材に連結されるとともに、その第２連結部材の姿勢変化によって一対の車輪側パーキングブレーキケーブルの張力が調整されるようになっているため、従来のようにイコライザアッセンブリを別体に設ける場合に比較して、イコライザアッセンブリは勿論、噛合部材を付勢する手段（前記板ばね３２など）が不要になり、少ない部品点数で簡単且つコンパクトに構成できる。
【００１５】
第３発明では、一対の噛合部材に設けられた操作部がそれぞれ中心線側へ接近するように把持されることにより、その噛合部材と噛合歯との噛合いが解除されるようになっているため、第１連結部材および第２連結部材を張力調整用付勢装置の付勢力に抗して容易に引張方向へ相対移動させることが可能で、第２連結部材の噛合部材に車輪側パーキングブレーキケーブルを連結する等の作業を容易且つ迅速に行うことができる。また、かかる連結作業を容易に行うために、第１連結部材および第２連結部材の相対移動を阻止するロック部材（前記ロックピン３８など）を別個に設ける必要がなく、部品点数が一層少なくなるとともに第２連結部材を小型化できる。
【００１６】
第４発明は、係合部から所定寸法だけ離間して配設された支持軸の軸心まわりの回動可能に係止部材が取り付けられ、一直線方向においてその支持軸から一方へ変位した位置で係合部と係合させられることにより、その変位方向へ係合部が相対移動することを許容しつつ逆方向へ相対移動することを阻止するようになっている点が第１発明と相違するが、係合部として噛合歯を設け、係止部材として噛合部材を設ければ、実質的に第１発明と同じになり、同様の作用効果が得られる。但し、第４発明では、噛合歯と噛合部材との噛合いだけでなく、係合部と係止部材とが摩擦係合させられる場合も含む一方、第１発明では、噛合部材の噛合い位置の変位方向と相対移動方向との関係に制限はなく、例えば前記図３に示すような噛合部材を採用することもできる。
【００１７】
【発明の実施の形態】
本発明の張力自動調整装置の第１連結部材は、例えばパーキングブレーキ操作部材に連結される第１パーキングブレーキケーブルに直接または間接的に連結されるが、パーキングブレーキケーブルを介することなく操作部材に直接配設することもできる。スイッチ操作で電動モータ等により引張力を発生させる場合は、その電動モータ等の駆動源側に第１パーキングブレーキケーブル等を介して連結される。第２連結部材の一対の噛合部材には、左右の車輪に設けられたパーキングブレーキに連結される車輪側パーキングブレーキケーブルが直接または間接的に連結される。
【００１８】
第１連結部材の一対の噛合歯は、例えば外向きに設けられて、その外側に配設される一対の噛合部材と噛み合わされるが、枠形状を成す第１連結部材の一対の辺に内向きに設けることも可能である。
【００１９】
張力調整用付勢装置としては、圧縮コイルスプリングや引張コイルスプリング等のスプリングが好適に用いられるが、圧縮ガスによってピストンロッドが突出または引き込まれるシリンダ装置、磁力によって付勢する磁石など、付勢力を付与できる種々の付勢装置を採用できる。
【００２０】
第４発明の係止部材は噛合部材を含むもので、係合部は噛合歯を含むものであるが、それ以外に互いに摩擦係合させられる場合を含む。第４発明の実施に際しても、第３発明と同様に、一対の係止部材には、それぞれ操作部が設けられ、その一対の操作部がそれぞれ中心線側へ接近するように把持されることにより前記係合部との係合が解除されるようにすることが望ましい。
【００２１】
以下、本発明の実施例を図面を参照しつつ詳細に説明する。
図１の(a) の張力自動調整装置５０は、前記図３の張力自動調整装置８の代わりに用いられるもので、スライドロッド５２およびフレーム５４を備えており、第１連結部材としてのスライドロッド５２には、図１(a) における左端部（車両前方側）に前記第１パーキングブレーキケーブル１０が連結されるとともに、第２連結部材としてのフレーム５４には前記第２、第３のパーキングブレーキケーブル２０、２２が連結されるようになっている。そして、パーキングブレーキ操作部材が操作されてパーキングブレーキが作動させられる際には、図１(a) の左右へ離間する引張方向、具体的にはスライドロッド５２が左方向へ引っ張られ、フレーム５４が右方向へ引っ張られるように、引張力が作用させられる。
【００２２】
フレーム５４は、平坦な金属板を略コの字形状に曲げ加工したもので、一対の略平行な側壁部５４ａ、５４ｂと背部５４ｃとを備えており、スライドロッド５２は側壁部５４ａと５４ｂとの間に挿入されるとともに、背部５４ｃに設けられた貫通穴５４ｄ内を遊びをもって貫通させられ、引張方向である一直線方向（図１(a) の左右方向）の相対移動可能とされている。スライドロッド５２の横断面は正方形または長方形で、そのスライドロッド５２の上面および下面（図１(a) の紙面の表裏側の面）と側壁部５４ａ、５４ｂとが面接触させられることにより、フレーム５４は図１(a) の紙面と平行な平面内に位置決めされるとともに、その平面内における姿勢変化が許容されるようになっている。図１(a) は、側壁部５４ａの一部を切り欠いた平面図で、(b) は側壁部５４ａの全部を切り欠いた平面図である。
【００２３】
スライドロッド５２には、前記一直線方向と平行な中心線Ｓを挟んで対称的な一対の側面に、それぞれ一直線方向に沿って多数の噛合歯５６、５８が設けられている一方、フレーム５４には、それ等の噛合歯５６、５８と噛み合わされる一対のポール６０、６２が取り付けられており、それ等の噛合いによってスライドロッド５２とフレーム５４とが引張方向へ相対移動することが阻止され、それ等の間で引張力が伝達される。ポール６０、６２は、それぞれ一直線方向と略直角で側壁部５４ａ、５４ｂに対して略垂直な支持軸６４、６６の軸心まわりの回動可能に取り付けられているとともに、支持軸６４、６６は、それぞれ噛合歯５６、５８の歯溝の底から一直線方向に対して直角な方向における離間寸法が、支持軸６４、６６から歯先６０ａ、６２ａまでの寸法より所定寸法だけ短い位置に配設され、それ等の歯先６０ａ、６２ａは一直線方向において支持軸６４、６６よりも図１(a) において右方向へ変位した位置で噛合歯５６、５８と噛み合わされるようになっており、噛合歯５６、５８がその変位方向（図１(a) の右方向）へ相対移動することを許容しつつ逆方向の相対移動を阻止する。すなわち、スライドロッド５２およびフレーム５４が引張方向へ相対移動することを阻止するとともに、引張方向と反対の張力調整方向への相対移動、すなわち図１においてフレーム５４がスライドロッド５２に対して相対的に左方向へ移動する相対移動は、ポール６０、６２が噛合歯５６、５８を乗り越えることによって許容される。ポール６０、６２は第１発明の噛合部材、第４発明の係止部材に相当し、噛合歯５６、５８は第４発明の係合部に相当する。
【００２４】
上記一対のポール６０、６２にはそれぞれ連結穴６０ｂ、６２ｂが設けられ、前記第２、第３のパーキングブレーキケーブル２０、２２が連結されるようになっており、それ等のパーキングブレーキケーブル２０、２２の引張力によってポール６０、６２はそれぞれ支持軸６４、６６の軸心まわりにおいて噛合歯５６、５８と噛み合う方向へ回動させられる。ポール６０、６２にはまた、中心線Ｓを挟んで略対称的で、且つ一直線方向において歯先６０ａ、６２ａと反対方向へ突き出すように操作部６０ｃ、６２ｃが設けられており、それ等の操作部６０ｃ、６２ｃがそれぞれ中心線Ｓに接近するように把持されることにより、前記噛合歯５６、５８との噛合いが解除されるようになっている。
【００２５】
前記スライドロッド５２の後端部にはばね受け６８が設けられ、フレーム５４の背部５４ｃとの間に圧縮コイルスプリング７０が配設されており、両者が前記張力調整方向へ相対移動するように付勢している。したがって、ケーブルの伸びやパーキングブレーキの摩耗などで、パーキングブレーキ解除時におけるパーキングブレーキケーブル１０、２０、２２の張力が低下すると、圧縮コイルスプリング７０の付勢力に従ってスライドロッド５２およびフレーム５４が張力調整方向へ相対移動させられ、ポール６０、６２がそれぞれ噛合歯５６、５８を乗り越えて図１の左方向へ相対移動させられることにより、それ等のスライドロッド５２およびフレーム５４の相対位置が１個の噛合歯５６、５８の分だけ変化させられる。これにより、パーキングブレーキ解除時におけるパーキングブレーキケーブル１０、２０、２２の張力が、圧縮コイルスプリング７０の付勢力に応じた所定の範囲内に自動的に調整され、パーキングブレーキ操作部材の操作量が所定の範囲内に維持される。圧縮コイルスプリング７０は張力調整用付勢装置に相当する。
【００２６】
また、左右の車輪のパーキングブレーキの摩耗のばらつきやパーキングブレーキケーブル２０、２２の長さのばらつきなどに起因してそれ等のパーキングブレーキケーブル２０、２２の張力が相違すると、その張力の相違に応じてフレーム５４は図１(b) のように姿勢が変化し、一対のポール６０、６２の支持軸６４、６６の一直線方向の位置が互いに相違するようになる。そして、この支持軸６４、６６の一直線方向の位置の相違により、図１(b) のように一方のポール６０のみが１個の噛合歯５６を乗り越えると、そのポール６０に連結された第２パーキングブレーキケーブル２０の張力のみが高められ、これにより両パーキングブレーキケーブル２０、２２の張力のばらつきが所定の範囲内に調整される。
【００２７】
このように、本実施例のパーキングブレーキケーブルの張力自動調整装置５０においては、スライドロッド５２の中心線Ｓを挟んで略対称的に一対の噛合歯５６、５８が設けられる一方、フレーム５４には、その噛合歯５６、５８と噛み合うように一対のポール６０、６２が設けられて、左右の車輪に連結された第２、第３のパーキングブレーキケーブル２０、２２がその一対のポール６０、６２に連結され、それ等のケーブル２０、２２の張力のアンバランスでフレーム５４の姿勢が変化し、一方のポール６０または６２が１個の噛合歯５６または５８を乗り越えることによりケーブル２０、２２の張力が略等しい大きさに調整されるため、従来のようにイコライザアッセンブリを別体に設ける場合に比較して、イコライザアッセンブリは勿論、ポール６０、６２を付勢する手段（前記板ばね３２など）が不要になり、少ない部品点数で簡単且つコンパクトに構成される。
【００２８】
また、このようなパーキングブレーキケーブルの張力自動調整装置５０は、パーキングブレーキケーブル１０、２０、２２を連結する前の単独の状態では、圧縮コイルスプリング７０の付勢力に従ってスライドロッド５２およびフレーム５４が張力調整方向へ自由に相対移動させられる。したがって、かかる張力自動調整装置５０を車両に組み付ける際には、実際の車両のパーキングブレーキケーブル１０、２０、２２の長さ寸法等に応じて、スライドロッド５２やポール６０、６２にそれ等を連結できるように、圧縮コイルスプリング７０の付勢力に抗してスライドロッド５２およびフレーム５４を引張方向へ相対移動させる必要があるが、本実施例では一対のポール６０、６２にそれぞれ操作部６０ｃ、６２ｃが設けられ、中心線Ｓに接近するように把持されることによりポール６０、６２と噛合歯５６、５８との噛合いが解除されるようになっているため、スライドロッド５２およびフレーム５４を圧縮コイルスプリング７０の付勢力に抗して容易に引張方向へ相対移動させることが可能であり、スライドロッド５２に第１パーキングブレーキケーブル１０を連結したり、フレーム５４のポール６０、６２に第２、第３のパーキングブレーキケーブル２０、２２を連結したりする作業を容易且つ迅速に行うことができる。また、このように引張方向へ容易に相対移動させることができるため、組付前の状態でスライドロッド５２およびフレーム５４の相対移動を阻止するロック部材（前記ロックピン３８など）を別個に設ける必要がなく、部品点数が一層少なくなるとともにフレーム５４を小型化できる。
【００２９】
なお、上例ではポール６０、６２と噛合歯５６、５８との噛合いによって引張方向の相対移動を阻止するようになっているが、図２に示すように一対の係合部８０、８２と一対の係止部材８４、８６との摩擦係合によって引張方向の相対移動を阻止するように構成することも可能である。図２は前記図１の(a) に相当する図で、フレーム５４の手前側の側壁部５４ａを総て切り欠いた図であり、係合部８０、８２、係止部材８４、８６を除いて前記実施例と同じである。また、係止部材８４、８６の連結穴８４ｂ、８６ｂ、および操作部８４ｃ、８６ｃは、それぞれポール６０、６２の連結穴６０ｂ、６２ｂ、および操作部６０ｃ、６２ｃと同様に構成されている。
【００３０】
以上、本発明の実施例を図面に基づいて詳細に説明したが、これ等はあくまでも一実施形態であり、本発明は当業者の知識に基づいて種々の変更，改良を加えた態様で実施することができる。
【図面の簡単な説明】
【図１】 (a) は本発明の一実施例であるパーキングブレーキケーブルの張力自動調整装置の一部を切り欠いた平面図で、(b) は一対の車輪側パーキングブレーキケーブルの張力を略同じ大きさに調整する作動を説明する図である。
【図２】本発明の別の実施例を説明する図である。
【図３】従来の張力自動調整装置の一例を説明する図で、(a) は斜視図、(b) は断面図である。
【符号の説明】
２０、２２：パーキングブレーキケーブル（車輪側パーキングブレーキケーブル）５０：張力自動調整装置５２：スライドロッド（第１連結部材）５４：フレーム（第２連結部材）５６、５８：噛合歯（係合部）６０、６２：ポール（噛合部材、係止部材）６０ｃ、６２ｃ：操作部６４、６６：支持軸７０：圧縮コイルスプリング（張力調整用付勢装置）８０、８２：係合部８４、８６：係止部材８４ｃ、８６ｃ：操作部Ｓ：中心線[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a parking brake cable automatic tension adjusting device, and more particularly, to a simple and compact automatic tension adjusting device with a small number of parts for automatically adjusting the tension of a parking brake cable branched to left and right wheels to a predetermined size. Is.
[0002]
[Prior art]
(a) a first connecting member and a second connecting member disposed on a transmission path of a tensile force transmitted by the parking brake cable so as to be relatively movable in a straight line direction substantially parallel to a tensile direction by the tensile force; b) a plurality of meshing teeth provided on the first connecting member along the straight line direction; and (c) the second connecting member rotatably about the axis of the support shaft substantially perpendicular to the straight line direction. By being attached and meshed with the meshing teeth, the tensile force is transmitted between the coupling members by preventing relative movement of the second coupling member and the first coupling member in the tension direction. And an engaging member that allows the connecting members to move relative to each other in the tension adjusting direction opposite to the tension direction; and (d) straddling the first connecting member and the second connecting member. Installed in the tension adjustment direction, etc. A tension adjusting urging device that urges the connecting members to move relative to each other, and (e) the first connecting member and the second connecting member are urged for tension adjustment when the parking brake is released. There is known an automatic tension adjusting device that automatically adjusts the tension of the parking brake cable by being relatively moved in the tension adjusting direction according to the urging force of the device.
[0003]
FIGS. 3A and 3B are views showing an automatic tension adjusting device for a parking brake cable described in Japanese Utility Model Laid-Open No. 1-68970, in which FIG. 3A is a perspective view and FIG. 3B is a longitudinal sectional view. The automatic tension adjusting device 8 includes a slide rod 12 connected to the other end of the first parking brake cable 10 connected to an operation member such as a parking brake operation lever, and the slide rod 12 is capable of relative movement in the axial direction. And a cylindrical frame 14 to be inserted. An equalizer assembly 18 is attached to the frame 14 via a support pin 16 perpendicular to a straight line direction that is a relative movement direction (left-right direction in FIG. 3), and is connected to a parking brake disposed on the left and right wheels. 2 and 3rd parking brake cables 20 and 22 are connected. In this case, the parking brake cables 10, 20, and 22 transmit the direction of separating left and right in FIG. 3, specifically, the direction in which the slide rod 12 is pulled leftward and the frame 14 is pulled rightward. The direction of the tensile force. The second and third parking brake cables 20 and 22 are wheel side parking brake cables.
[0004]
The slide rod 12 has a rectangular cross section, and a plurality of meshing teeth 24 are provided on one side surface along a straight line direction (relative movement direction), while the frame 14 meshes with the meshing teeth 24. The engagement member 26 is attached, and the engagement prevents the relative movement of the slide rod 12 and the frame 14 in the tensile direction, and the tensile force is transmitted between them. The engagement member 26 is disposed at the distal ends of a pair of arms 30 that are rotatably attached to the frame 14 around the axis of the pin 28 that is substantially perpendicular to the straight line direction (relative movement direction). 32 is biased in the direction of meshing with the meshing teeth 24. Further, the relative movement in the tension adjustment direction opposite to the tension direction is allowed by the engagement member 26 getting over the engagement teeth 24 against the urging force of the leaf spring 32. The slide rod 12 corresponds to a first connecting member, the frame 14 corresponds to a second connecting member, and the pin 28 corresponds to a support shaft.
[0005]
On the other hand, a spring receiver 34 is provided at the rear end portion of the slide rod 12, and a compression coil spring 36 is disposed between the slide rod 12 and the frame 14, and both are biased so as to move relative to each other in the tension adjusting direction. ing. Therefore, when the tension of the parking brake cables 10, 20, 22 when the parking brake is released is reduced due to cable extension or parking brake wear, the slide rod 12 and the frame 14 are adjusted in the tension adjusting direction according to the urging force of the compression coil spring 36. The relative position of the slide rod 12 and the frame 14 is changed by the amount of one meshing tooth 24 when the meshing member 26 gets over the meshing tooth 24. Thus, the tension of the parking brake cables 10, 20, and 22 when the parking brake is released is automatically adjusted to a predetermined value corresponding to the urging force of the compression coil spring 36, and the operation amount of the parking brake operating member is within a predetermined range. Maintained within. The second and third parking brake cables 20 and 22 are adjusted to substantially equal tensions by rotating the equalizer assembly 18 around the support pins 16. The compression coil spring 36 corresponds to a tension adjusting urging device.
[0006]
In addition, the automatic tension adjusting device 8 is detachably provided with a lock pin 38 that prevents relative movement between the slide rod 12 and the frame 14 and is compressed before the parking brake cables 10, 20, 22 are connected. According to the urging force of the coil spring 36, the two are prevented from relatively moving in the tension adjusting direction.
[0007]
[Problems to be solved by the invention]
However, in such a conventional automatic tension adjusting device, the equalizer assembly 18 is attached to the frame 14 so as to be rotatable around the support pin 16, and the second and third parking brake cables 20, 22 are attached to the equalizer assembly 18. Therefore, there is a problem that the number of parts is large, the structure is complicated and large, and the manufacturing cost is increased.
[0008]
The present invention has been made against the background of the above circumstances. The purpose of the present invention is to provide an automatic tension adjusting device for adjusting the tension of the parking brake cable branched to the left and right wheels to a predetermined size with a small number of parts. The objective is to make it simple and compact.
[0009]
[Means for Solving the Problems]
To achieve the above object, the first invention, the tensile force of the transmission path which is transmitted by (a) a parking brake cable is pulling direction and flat line a straight line direction of the relatively movable arranged by its tensile force and a first connecting member and the second connecting member, (b) a plurality of engagement teeth provided along said straight direction to said first connecting member, pivotally before Symbol second connecting member (c) By being attached and meshed with the meshing teeth, the tensile force is transmitted between the coupling members by preventing relative movement of the second coupling member and the first coupling member in the tension direction. And an engaging member that allows the connecting members to move relative to each other in the tension adjusting direction opposite to the tension direction; and (d) straddling the first connecting member and the second connecting member. Connected to the tension adjustment direction And (e) the first connecting member and the second connecting member of the tension adjusting biasing device when the parking brake is released. by being moved relative to the tensioning direction by the biasing force, the automatic tension automatic adjustment device for adjusting the tension of the parking brake cable, (f) the number of meshing teeth, wherein the alignment direction and the flat ne line while it provided a pair across the center line as would engaged with (g) said engagement member is supported respectively by provided a pair a pair of support shafts and the pair of engaging teeth, the left and right respectively A wheel side parking brake cable connected to a wheel parking brake is connected and rotated around the support shaft in the direction of meshing with the meshing teeth by the tensile force. (H) The second connecting member provided with the pair of engagement members is allowed to change its posture so that the pair of support shafts move relative to each other in the straight line direction. cage, characterized in that the tension of the pair of wheel-side parking brake cable by the posture change of the second connecting member is adjusted.
[0010]
The second invention provides a tension automatic adjuster of the parking brake cable of the first aspect of the present invention, (a) said pair of meshing teeth, while provided outwardly relative to said center line, (b) said pair of The meshing members are rotatably supported by the support shafts at positions outside the meshing teeth with respect to the center line, respectively, and the wheel side parking brake cable is pulled from the support shaft in the straight line direction. It is meshed with the meshing tooth at a position displaced in the direction pulled by force, and is connected to the wheel side parking brake cable at a position further outside the support shaft.
[0011]
The third invention is the tension automatic adjuster of the parking brake cable of the first or second aspect, wherein the pair of engagement members, their respective operation portions are provided, the pair of operating portions the respective centers It is characterized in that the engagement with the meshing teeth is released by being gripped so as to approach the line side.
[0012]
The fourth invention, (a) the transmission path of the tensile force transmitted by the parking brake cable, first connecting member and a second that is pulling direction and flat line a straight line direction of the relatively movable arranged by its tensile force a connecting member, (b) the a first connecting member to the engaging portion provided along a straight line direction, (c) the shaft supporting region axis that is disposed separately by a predetermined distance from the engaging portion mounted on pivotally the second coupling member around the heart, the are that were at a position displaced to one of the support shaft engaged with the engagement portion in a straight line direction, its engagement portion to the displacement direction By preventing relative movement in the opposite direction while allowing relative movement, the second connection member and the first connection member are prevented from relatively moving in the pulling direction, and their connection In addition to transmitting the tensile force between members, A locking member that allows the connecting members to move relative to each other in the tension adjustment direction opposite to the tension direction; and (d) disposed across the first connecting member and the second connecting member. A tension adjusting urging device that urges the connecting members to move relative to each other in the tension adjusting direction, and (e) the first connecting member and the second connecting member when the parking brake is released. In the automatic tension adjusting device that automatically adjusts the tension of the parking brake cable by the relative movement of the member in the tension adjusting direction according to the biasing force of the tension adjusting biasing device, (f) the engagement portion is the one that provided a pair across the line direction and flat row center line, (g) said locking member is a pair provided in each supported by and said pair of engagement by a pair of support shafts Is engaged with the Wheel side parking brake cables connected to the parking brakes of the left and right wheels are connected to each other, and are rotated in the direction of engaging with the engaging portion around the support shaft by the tensile force. (H) The second connecting member provided with the pair of locking members is allowed to change its posture so that the pair of support shafts move relative to each other in the straight line direction. the change in the posture of the second linking member, characterized in that it is tension adjustment of the pair of wheel-side parking brake cable.
[0013]
The fifth invention is the tension automatic adjuster of the parking brake cable of the fourth aspect of the present invention, (a) said pair of engaging portions, while provided outwardly relative to said center line, (b) the pair Each of the locking members is rotatably supported by the support shaft at a position outside the engaging portion with respect to the center line, and the wheel-side parking brake from the support shaft in the straight line direction. It is engaged with the engaging portion at a position displaced in the direction of being pulled by the pulling force of the cable, and is connected to the wheel-side parking brake cable at a position further outside the support shaft. To do.
[0014]
【The invention's effect】
In tension automatic adjuster of the parking brake cable of the first aspect of the invention, so that one of a pair of meshing teeth are provided across the center line in the first coupling member, the second connecting member, meshing with the meshing teeth A pair of wheel-side parking brake cables, which are provided with a pair of meshing members and coupled to the left and right wheels, are coupled to the pair of meshing members, and the pair of wheel-side parking brakes are changed by the posture change of the second coupling member. since the tension of the cable is adapted to be adjusted, as compared with the case where as in the prior art providing an equalizer assembly separately, the equalizer assembly, of course, means for biasing the engaging member (such as the leaf spring 32 ) Is unnecessary, and can be configured easily and compactly with a small number of parts.
[0015]
In the third aspect of the invention, the operation portions provided on the pair of meshing members are respectively gripped so as to approach the center line side, whereby the meshing between the meshing member and the meshing teeth is released. Therefore, it is possible to easily move the first connecting member and the second connecting member in the pulling direction against the urging force of the tension adjusting urging device, and the wheel side parking brake is connected to the meshing member of the second connecting member. Operations such as connecting cables can be performed easily and quickly. Further, in order to easily perform such connection work, there is no need to separately provide a lock member (such as the lock pin 38) for preventing the relative movement of the first connection member and the second connection member, and the number of parts is further reduced. In addition, the second connecting member can be reduced in size.
[0016]
The fourth invention is rotatable locking member about the axis supporting region axis only is disposed separately predetermined size is attached from the engaging portion, displaced to one from the support shaft in one linear direction By being engaged with the engaging portion at the position, the relative movement in the opposite direction is prevented while allowing the engaging portion to relatively move in the displacement direction. Although it is different, if a meshing tooth is provided as the engaging portion and a meshing member is provided as the locking member, it is substantially the same as the first invention, and the same operational effects are obtained. However, the fourth invention includes not only the meshing between the meshing tooth and the meshing member but also the case where the engaging portion and the locking member are frictionally engaged, whereas in the first invention, the meshing position of the meshing member is included. There is no limitation on the relationship between the displacement direction and the relative movement direction, and for example, a meshing member as shown in FIG. 3 may be employed.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
The first connecting member tension automatic adjustment device of the present invention, for example, first it is directly or indirectly connected to the parking brake cable which is consolidated in the parking brake operating member, the operating member without using a parking brake cable It can also be arranged directly. When a tensile force is generated by an electric motor or the like by a switch operation, it is connected to a drive source side of the electric motor or the like via a first parking brake cable or the like. A pair of meshing members of the second connecting member is directly or indirectly connected to a wheel-side parking brake cable that is connected to a parking brake provided on the left and right wheels.
[0018]
The pair of meshing teeth of the first connecting member are provided outward, for example, and meshed with the pair of meshing members disposed on the outside thereof, but are internally connected to the pair of sides of the first coupling member having a frame shape. It is also possible to provide it in the direction.
[0019]
As an urging device for tension adjustment, a spring such as a compression coil spring or a tension coil spring is preferably used. However, a urging force such as a cylinder device in which a piston rod protrudes or retracts by compressed gas, a magnet urged by magnetic force, etc. Various urging devices that can be applied can be employed.
[0020]
The locking member according to the fourth aspect of the invention includes a meshing member, and the engaging portion includes a meshing tooth, but includes a case where the engaging members are frictionally engaged with each other. Also in the practice of the fourth aspect of the present invention, as with the third invention, the pair of locking members, their respective operation portions are provided such that the pair of operating portions approaches to neutral alignment side, respectively it It is desirable that the engagement with the engaging portion is released by being gripped.
[0021]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
An automatic tension adjusting device 50 shown in FIG. 1A is used in place of the automatic tension adjusting device 8 shown in FIG. 3, and includes a slide rod 52 and a frame 54, and a slide rod as a first connecting member. 52, the first parking brake cable 10 is connected to the left end (the vehicle front side) in FIG. 1 (a), and the second and third parking brakes are connected to a frame 54 as a second connecting member. The cables 20 and 22 are connected. When the parking brake operating member is operated and the parking brake is operated, the pulling direction of separating left and right in FIG. 1A, specifically, the slide rod 52 is pulled leftward, and the frame 54 is moved. A tensile force is applied so that it is pulled to the right.
[0022]
The frame 54 is formed by bending a flat metal plate into a substantially U-shape, and includes a pair of substantially parallel side wall portions 54a and 54b and a back portion 54c. The slide rod 52 includes side wall portions 54a and 54b. Is inserted between the through holes 54d, and is allowed to pass through the through holes 54d provided in the back portion 54c with play so as to be relatively movable in a straight line direction (the left-right direction in FIG. 1 (a)). The slide rod 52 has a square or rectangular cross section, and the upper and lower surfaces of the slide rod 52 (surfaces on the front and back sides of FIG. 1A) and the side wall portions 54a and 54b are brought into surface contact with each other. 54 is positioned in a plane parallel to the paper surface of FIG. 1 (a), and posture change in the plane is allowed. FIG. 1A is a plan view in which a part of the side wall portion 54a is cut out, and FIG. 1B is a plan view in which the entire side wall portion 54a is cut out.
[0023]
The slide rod 52 is provided with a large number of meshing teeth 56 and 58 along a straight line direction on a pair of symmetrical side surfaces across a center line S parallel to the straight line direction. A pair of poles 60 and 62 meshed with the meshing teeth 56 and 58 are attached, and the meshing of these prevents the slide rod 52 and the frame 54 from moving relative to each other in the tensile direction. A tensile force is transmitted between them. The poles 60 and 62 are attached so as to be rotatable about the axis of the support shafts 64 and 66 that are substantially perpendicular to the side wall portions 54a and 54b at right angles to the straight line direction, respectively. The spacing dimension in the direction perpendicular to the straight line direction from the bottom of the tooth groove of the meshing teeth 56 and 58 is disposed at a position shorter than the dimension from the support shafts 64 and 66 to the tooth tips 60a and 62a by a predetermined dimension. The tooth tips 60a and 62a are meshed with the meshing teeth 56 and 58 at a position displaced in the right direction in FIG. 1A from the support shafts 64 and 66 in the straight line direction. 56 and 58 prevent relative movement in the reverse direction while allowing relative movement in the displacement direction (right direction in FIG. 1A). That is, the slide rod 52 and the frame 54 are prevented from moving relative to each other in the pulling direction, and the relative movement in the tension adjusting direction opposite to the pulling direction, that is, the frame 54 in FIG. Relative movement that moves to the left is allowed as the poles 60, 62 ride over the meshing teeth 56, 58. The poles 60 and 62 correspond to the engaging member of the first invention and the locking member of the fourth invention, and the engaging teeth 56 and 58 correspond to the engaging portion of the fourth invention.
[0024]
The pair of poles 60, 62 are provided with connecting holes 60b, 62b, respectively, to which the second and third parking brake cables 20, 22 are connected, and the parking brake cables 20, The poles 60 and 62 are rotated in the direction of meshing with the meshing teeth 56 and 58 around the shaft centers of the support shafts 64 and 66, respectively, by the tensile force of 22. The poles 60 and 62 are also provided with operation portions 60c and 62c that are substantially symmetrical with respect to the center line S and project in the direction opposite to the tooth tips 60a and 62a in a straight line direction. As the portions 60c and 62c are gripped so as to approach the center line S, the meshing with the meshing teeth 56 and 58 is released.
[0025]
A spring receiver 68 is provided at the rear end portion of the slide rod 52, and a compression coil spring 70 is disposed between the slide rod 52 and the back portion 54c of the frame 54, and both are attached so as to move relative to each other in the tension adjusting direction. It is fast. Therefore, when the tension of the parking brake cables 10, 20, 22 when the parking brake is released is reduced due to cable extension or parking brake wear, the slide rod 52 and the frame 54 are adjusted in the tension adjusting direction according to the urging force of the compression coil spring 70. 1 and the poles 60 and 62 are moved relative to the left direction in FIG. 1 over the meshing teeth 56 and 58, respectively, so that the relative positions of the slide rod 52 and the frame 54 are one mesh. It is changed by the amount of the teeth 56 and 58. As a result, the tension of the parking brake cables 10, 20, and 22 when the parking brake is released is automatically adjusted within a predetermined range according to the urging force of the compression coil spring 70, and the amount of operation of the parking brake operating member is predetermined. Maintained within the range. The compression coil spring 70 corresponds to a tension adjusting biasing device.
[0026]
Further, if the tensions of the parking brake cables 20 and 22 differ due to variations in the wear of the parking brakes on the left and right wheels and the variations in the lengths of the parking brake cables 20 and 22, the differences in the tensions are determined. The posture of the frame 54 changes as shown in FIG. 1B, and the positions of the support shafts 64 and 66 of the pair of poles 60 and 62 in the straight line direction are different from each other. Due to the difference in the positions of the support shafts 64 and 66 in the straight line direction, when only one pole 60 gets over one meshing tooth 56 as shown in FIG. Only the tension of the parking brake cable 20 is increased, whereby the variation in tension between the parking brake cables 20 and 22 is adjusted within a predetermined range.
[0027]
Thus, in the automatic tension adjusting device 50 for the parking brake cable of the present embodiment, a pair of meshing teeth 56 and 58 are provided approximately symmetrically across the center line S of the slide rod 52, while the frame 54 has A pair of poles 60, 62 are provided so as to mesh with the meshing teeth 56, 58, and the second and third parking brake cables 20, 22 connected to the left and right wheels are connected to the pair of poles 60, 62. The posture of the frame 54 is changed due to the unbalance of the tension of the cables 20 and 22, and the tension of the cables 20 and 22 is increased by the fact that one pole 60 or 62 rides over one meshing tooth 56 or 58. Since it is adjusted to approximately the same size, the equalizer assembly is compared to the case where the equalizer assembly is provided separately as in the prior art. Argument, (such as the leaf spring 32) means for urging the pawl 60, 62 is not required, and the simple and compact with a small number of parts.
[0028]
Further, in such an automatic tension adjusting device 50 for the parking brake cable, the slide rod 52 and the frame 54 are tensioned according to the urging force of the compression coil spring 70 in a single state before the parking brake cables 10, 20, 22 are connected. Relative movement can be freely made in the adjustment direction. Therefore, when assembling such an automatic tension adjusting device 50 in a vehicle, it is connected to the slide rod 52 and the poles 60 and 62 in accordance with the length dimensions of the actual parking brake cables 10, 20, and 22 of the vehicle. Although it is necessary to move the slide rod 52 and the frame 54 in the pulling direction against the urging force of the compression coil spring 70 so as to be able to do this, in this embodiment, the operation portions 60c and 62c are respectively connected to the pair of poles 60 and 62. Since the engagement between the pawls 60 and 62 and the engagement teeth 56 and 58 is released by being gripped so as to approach the center line S, the slide rod 52 and the frame 54 are compressed. Relative movement in the tension direction can be easily performed against the biasing force of the coil spring 70, and the slide rod 52 can Or connecting the parking brake cable 10, the second pole 60, 62 of the frame 54, work can be performed easily and quickly or to connect the third parking brake cable 20, 22. Further, since the relative movement in the pulling direction can be easily performed in this way, it is necessary to separately provide a lock member (such as the lock pin 38) for preventing the relative movement of the slide rod 52 and the frame 54 before the assembly. The number of parts is further reduced and the frame 54 can be downsized.
[0029]
In the above example, the relative movement in the tensile direction is prevented by the engagement between the poles 60 and 62 and the meshing teeth 56 and 58, but as shown in FIG. It is also possible to prevent the relative movement in the tensile direction by frictional engagement with the pair of locking members 84 and 86. FIG. 2 is a view corresponding to FIG. 1A, in which the side wall portion 54a on the front side of the frame 54 is entirely cut away, and the engagement portions 80 and 82 and the locking members 84 and 86 are excluded. The same as the previous embodiment. Further, the connection holes 84b and 86b of the locking members 84 and 86 and the operation portions 84c and 86c are configured in the same manner as the connection holes 60b and 62b of the poles 60 and 62 and the operation portions 60c and 62c, respectively.
[0030]
As mentioned above, although the Example of this invention was described in detail based on drawing, these are one embodiment to the last, and this invention is implemented in the aspect which added the various change and improvement based on the knowledge of those skilled in the art. be able to.
[Brief description of the drawings]
FIG. 1A is a plan view of a parking brake cable tension automatic adjustment device according to an embodiment of the present invention, and FIG. 1B is a plan view of a tension of a pair of wheel side parking brake cables. It is a figure explaining the action | operation adjusted to the same magnitude | size.
FIG. 2 is a diagram for explaining another embodiment of the present invention.
FIGS. 3A and 3B are diagrams illustrating an example of a conventional automatic tension adjusting device, where FIG. 3A is a perspective view and FIG. 3B is a cross-sectional view.
[Explanation of symbols]
20, 22: Parking brake cable (wheel side parking brake cable) 50: Automatic tension adjusting device 52: Slide rod (first connecting member) 54: Frame (second connecting member) 56, 58: Engagement teeth (engaging portion) 60, 62: Pole (meshing member, locking member) 60c, 62c: operation portion 64, 66: support shaft 70: compression coil spring (biasing device for tension adjustment) 80, 82: engagement portion 84, 86: engagement Stop member 84c, 86c: operation part S: center line

Claims

The tension of the transmission path transmitted by the parking brake cable, a first connecting member and the second coupling member that is pulling direction and flat line a straight line direction of the relatively movable arranged by the cited tension,
A number of meshing teeth provided on the first connecting member along the straight direction;
Meshes with the previous SL pivotally mounted by the meshing teeth on the second coupling member, by preventing that said the pulling direction and the second connecting member and the first coupling member are moved relative to it, etc. A meshing member that transmits the tensile force between the connecting members of each other and allows the connecting members to relatively move in a tension adjustment direction opposite to the tension direction;
A tension adjusting urging device that is disposed across the first linking member and the second linking member and urges the linking members to move relative to each other in the tension adjusting direction;
And when the parking brake is released, the first connecting member and the second connecting member are relatively moved in the tension adjusting direction according to the biasing force of the tension adjusting biasing device, whereby the tension of the parking brake cable is In an automatic tension adjustment device that automatically adjusts
While the plurality of engaging teeth is provided the line direction and a pair across a flat row center line,
Wherein the engaging member, with which meshes, respectively supported by and said pair of meshing teeth of a pair of support shafts provided a pair, left and right wheels parking concatenated wheel side parking brake cable to the brake are connected to each And by the tensile force, the support shaft can be rotated in the direction of meshing with the meshing teeth around the support shaft,
The second connecting member provided with the pair of engagement members is allowed to change its posture so that the pair of support shafts move relative to each other in the straight line direction, and the posture change of the second connecting member tension automatic adjustment device of the parking brake cable, characterized in that the tension is adjusted to the pair of wheel-side parking brake cable by.

The pair of meshing teeth are provided outward with respect to the center line,
The pair of meshing members are rotatably supported by the support shaft at positions outside the meshing teeth with respect to the center line, and the wheel-side parking brake is supported from the support shaft in the straight line direction. It is meshed with the meshing tooth at a position displaced in the direction of being pulled by the tensile force of the cable, and is connected to the wheel side parking brake cable at a position further outside the support shaft.
The automatic tension adjusting device for a parking brake cable according to claim 1.

Wherein the pair of engagement members, their respective operation portion is provided, meshing with the meshing teeth by the pair of the operation unit is held so as to approach to each of the center line side is canceled The automatic tension adjusting device for a parking brake cable according to claim 1 or 2 , wherein the automatic tension adjusting device is used.

The tension of the transmission path transmitted by the parking brake cable, a first connecting member and the second coupling member that is pulling direction and flat line a straight line direction of the relatively movable arranged by the cited tension,
An engaging portion provided on the first connecting member along the straight line direction;
It mounted on pivotally the second coupling member about the axis supporting region axis that is disposed separately by a predetermined distance from the engaging portion, a position displaced to one of the support shaft in the straight line direction The second connecting member in the pulling direction by preventing the relative moving in the opposite direction while allowing the engaging portion to move in the displacement direction. And the first connecting member are prevented from relatively moving, the tensile force is transmitted between the connecting members, and the connecting members are relatively moved in a tension adjusting direction opposite to the tension direction. A locking member that allows
A tension adjusting urging device that is disposed across the first linking member and the second linking member and urges the linking members to move relative to each other in the tension adjusting direction;
And when the parking brake is released, the first connecting member and the second connecting member are relatively moved in the tension adjusting direction according to the biasing force of the tension adjusting biasing device, whereby the tension of the parking brake cable is In an automatic tension adjustment device that automatically adjusts
The engaging portion, while provided a pair across the line direction and the flat row center line,
The locking member is a pair provided with a pair of each supported by a support shaft and the pair of together brought engagement portion engaged with, on the left and right wheels of the parking brake coupled to the wheel-side parking brake cable Are connected and rotated around the support shaft in the direction of engagement with the engagement portion by the tensile force,
The second connecting member provided with the pair of locking members is allowed to change its posture so that the pair of support shafts move relative to each other in the straight line direction. The posture of the second connecting member tension automatic adjustment device of the parking brake cable, characterized in that the tension is adjusted to the pair of wheel-side parking brake cable by a change.

The pair of engaging portions are provided outward with respect to the center line,
Each of the pair of locking members is rotatably supported by the support shaft at a position outside the engaging portion with respect to the center line, and from the support shaft to the wheel side in the straight line direction. The parking brake cable is engaged with the engaging portion at a position displaced in a pulling direction by a pulling force of the parking brake cable, and is connected to the wheel side parking brake cable at a position further outside the support shaft.
The automatic tension adjusting device for a parking brake cable according to claim 4.