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JP4397672B2 - Elevator equipment - Google Patents
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JP4397672B2 - Elevator equipment - Google Patents

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JP4397672B2
JP4397672B2 JP2003367209A JP2003367209A JP4397672B2 JP 4397672 B2 JP4397672 B2 JP 4397672B2 JP 2003367209 A JP2003367209 A JP 2003367209A JP 2003367209 A JP2003367209 A JP 2003367209A JP 4397672 B2 JP4397672 B2 JP 4397672B2
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elevator
main rope
braking
sheave
brake lining
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JP2005132508A (en
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加藤  久仁夫
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Description

この発明は、エレベータ装置に関するものである。 The present invention relates to an elevator apparatus .

従来のエレベータ用ブレーキ装置には、制動時に、かご及び釣合い重りを懸吊するロープが巻き掛けられた綱車とその周辺部材との間に押し込まれ、綱車との間にロープを把持することによってかごを停止させる楔状の制動部材を備えたものがある。(例えば、特許文献1参照)。   In a conventional elevator brake device, during braking, a rope for suspending a car and a counterweight is pushed between a sheave around which the rope is wound and its peripheral members, and the rope is gripped between the sheave and the sheave. Some have a wedge-shaped braking member that stops the car. (For example, refer to Patent Document 1).

特開平6−199483号公報JP-A-6-199483

特許文献1記載のエレベータ用ブレーキ装置では、制動時に、ロープが巻き掛けられた綱車とその周辺部材との間に楔状の制動部材が押し込まれることによって、綱車とロープとの摩擦によらずにかごや釣合い重りを停止させる構造を有している。しかし、制動部材が楔状であることから、倍力効果によって大きな制動力が得られる反面、制動部材が綱車とその周辺部材との間に食い込んでしまい、磁気マグネット等では制動部材を元の位置に戻すことが困難となっていた。このため、非常停止用の制動装置としては有効であるが、制動後すぐに運転を再開するような場合には適用することが難しかった。   In the elevator brake device described in Patent Document 1, a wedge-shaped braking member is pushed between the sheave around which the rope is wound and its peripheral members during braking, so that the friction between the sheave and the rope is not affected. It has a structure that stops the basket and counterweight. However, since the braking member is wedge-shaped, a large braking force can be obtained by the boost effect, but the braking member bites between the sheave and its peripheral members, and the magnetic member or the like places the braking member in its original position. It was difficult to return to For this reason, it is effective as a braking device for emergency stop, but it has been difficult to apply when the operation is resumed immediately after braking.

また、その他のエレベータ用ブレーキ装置として、昇降路上方に機械室のないエレベータ装置の場合には薄型巻上機の本体内部に内蔵されたものが、また、機械室を有するエレベータ装置の場合には巻上機の駆動綱車とそらせ車との間に配置されたもの等が考えられている。しかし、薄型巻上機の本体内部に内蔵されたブレーキ装置は、昇降路内に設置するように小型化された巻上機の内部に密に実装されているため、組立及び保守作業が困難になるという問題があった。また、巻上機の駆動綱車とそらせ車との間に配置されたブレーキ装置は、巻上機とそらせ車との間にブレーキ装置設置のための空間が必要となるため、必然的に巻上機の設置位置が高くなり、保守作業が困難になるとともに、巻上機とそらせ車との間に張設されたロープには振動が発生するため、ロープとブレーキ装置の制動部材との間にも所定の間隔を有する必要があり、ブレーキ装置が大型化し、高価になるという問題が生じていた。   Also, as other elevator brake devices, those built in the main body of the thin hoisting machine in the case of an elevator device without a machine room above the hoistway, and in the case of an elevator device having a machine room The thing etc. which are arrange | positioned between the driving sheave of a hoisting machine and a deflecting wheel are considered. However, since the brake device built in the main body of the thin hoisting machine is densely mounted inside the hoisting machine that is miniaturized so as to be installed in the hoistway, assembly and maintenance work becomes difficult. There was a problem of becoming. Also, the brake device arranged between the hoisting sheave and the deflector wheel requires a space for installing the brake device between the hoister and the deflector wheel. The installation position of the upper machine becomes higher, making maintenance work difficult, and vibration is generated in the rope stretched between the hoisting machine and the baffle, so that there is a gap between the rope and the braking member of the brake device. In addition, it is necessary to have a predetermined interval, which causes a problem that the brake device becomes large and expensive.

この発明は、上述のような課題を解決するためになされたもので、その目的は、構造及び構成を簡単にしてエレベータ用ブレーキ装置の組立及び保守作業容易にするとともに、このブレーキ装置を安価に供給することができるエレベータ装置提供することである。 The present invention has been made to solve the above problems, its object, together with to simplify the construction and arrangement to facilitate assembly and maintenance of the elevator braking device, inexpensive brake device a Rukoto provide an elevator apparatus that can be supplied to the.

この発明に係るエレベータ装置は、エレベータのかご及び釣合い重りを懸吊する主索と、エレベータの薄型巻上機の本体部と、本体部の一面に設けられ、主索が巻き掛けられた駆動綱車と、制動時に駆動綱車に巻き掛けられた主索に係合することによって制動のための摩擦力を発生させるブレーキライニングと、このブレーキライニングの動きを制御する制御装置とを備え、制御装置は、本体部の一面内で且つ駆動綱車の一面からの突出範囲内からなる薄型巻上機の外形上の引退部に収められたものである。
また、この発明に係るエレベータ装置は、エレベータのかご及び釣合い重りを懸吊する主索と、エレベータの薄型巻上機の本体部と、本体部の一面に設けられ、主索が巻き掛けられた駆動綱車と、制動時に主索の巻き掛けられていない駆動綱車の外周部に係合することによって制動のための摩擦力を発生させるブレーキライニングと、このブレーキライニングの動きを制御する制御装置とを備え、制御装置は、本体部の一面内で且つ駆動綱車の一面からの突出範囲内からなる薄型巻上機の外形上の引退部に収められたものである。
An elevator apparatus according to the present invention includes a main rope for suspending an elevator car and a counterweight , a main body portion of a thin hoisting machine for an elevator, and a drive rope on which the main rope is wound. comprising: a car, a brake lining to generate a frictional force for braking by engaging the wound around the main rope to the drive sheave during braking, and a control device for controlling the movement of the brake lining, the control device Is housed in a retraction part on the outer shape of the thin hoisting machine, which is located within one surface of the main body and within a projecting range from one surface of the driving sheave .
Moreover, the elevator apparatus according to the present invention is provided on one surface of the main rope for suspending the elevator car and the counterweight, the main body of the thin hoisting machine for the elevator, and the main rope is wound around the main rope. A driving sheave, a brake lining that generates a frictional force for braking by engaging with an outer periphery of a driving sheave on which the main rope is not wound during braking, and a control device that controls the movement of the brake lining And the control device is housed in a retraction portion on the outer shape of the thin hoisting machine, which is located within one surface of the main body portion and within a protruding range from one surface of the driving sheave.

この発明によれば
構造及び構成を簡単にしてエレベータ用ブレーキ装置の組立及び保守作業容易にできこのブレーキ装置を安価に供給することができるようになる。
According to this invention,
To simplify the structure and arrangement can easily assemble and maintenance of the elevator brake system, so that the braking device can be supplied at low cost.

実施の形態1.
図1はこの発明の実施の形態1におけるエレベータ用ブレーキ装置の斜視図、図2はその要部詳細図、図3はブレーキ装置非動作時の図2のA−A断面図、図4はブレーキ装置動作時の図2のA−A断面図である。
Embodiment 1 FIG.
1 is a perspective view of an elevator brake device according to Embodiment 1 of the present invention, FIG. 2 is a detailed view of a main part thereof, FIG. 3 is a cross-sectional view taken along line AA of FIG. 2 when the brake device is not operated, and FIG. It is AA sectional drawing of FIG. 2 at the time of apparatus operation | movement.

図において、エレベータ昇降路の上部に設置される機械室レスエレベータ用の薄型巻上機1の一側面に円柱状を呈する駆動綱車2が設けられ、この駆動綱車2の外周部には、断面が半円状の鋼溝2aが複数本無端状に形成されている。この鋼溝2aには、エレベータのかご(図示せず)と釣合い重り(図示せず)とを懸吊する主索3が巻き掛けられている。この主索3が巻き掛けられた駆動綱車2が回動すると、主索3は、主索3と鋼溝2aとの摩擦力によって駆動綱車2に連動して移動し、主索3に連結されたエレベータのかごと釣合い重りとはエレベータ昇降路内を互いに逆方向に昇降する。   In the figure, a drive sheave 2 having a columnar shape is provided on one side surface of a thin hoist 1 for machine room-less elevator installed at the upper part of the elevator hoistway. A plurality of steel grooves 2a having a semicircular cross section are formed in an endless shape. A main rope 3 for suspending an elevator car (not shown) and a counterweight (not shown) is wound around the steel groove 2a. When the driving sheave 2 around which the main rope 3 is wound rotates, the main rope 3 moves in conjunction with the driving sheave 2 by the frictional force between the main rope 3 and the steel groove 2a. The connected elevator car and the counterweight move up and down in the elevator hoistway in opposite directions.

次に、ブレーキ装置について説明する。
ブレーキ装置は、ブレーキライニング5とこのブレーキライニング5の動きを制御する制御装置4から構成されている。制御装置4は駆動綱車2の両側に設置され、薄型巻上機1の駆動綱車2設置面内で、且つ駆動綱車2の突出範囲内からなるエレベータ巻上機の外形上の引退部に収められている。また、この制御装置4の駆動綱車2側には、駆動綱車2の斜め上方となる位置にブレーキライニング5が設けられている。このブレーキライニング5の駆動綱車2側には、駆動綱車2の外周面と略同曲率の凹状の制動面5cが設けられ、この制動面5cに、断面が半円状を呈する制動溝5aが、駆動綱車2の鋼溝2aと同方向に複数形成されている。ブレーキ装置非制動時には、駆動綱車2に巻き掛けられた主索3と制動面5cに形成された制動溝5aとは所定の間隙を有するように配置されており、制動の際に、制御装置4によってブレーキライニング5が駆動綱車2の中心方向、つまり主索3に対してはほぼ垂直方向に向かって押し付けられ、制動面5cに設けられた制動溝5aが駆動綱車2に巻き掛けられた主索3に係合して、制動のための摩擦力が発生する。なお、図4に示すように、制動の際にブレーキライニング5に設けられた制動面5cと駆動綱車2の外周面とは接触していない。
Next, the brake device will be described.
The brake device includes a brake lining 5 and a control device 4 that controls the movement of the brake lining 5. The control device 4 is installed on both sides of the driving sheave 2, and is a retraction portion on the outer shape of the elevator hoisting machine within the driving sheave 2 installation surface of the thin hoisting machine 1 and within the protruding range of the driving sheave 2. It is contained in. A brake lining 5 is provided on the drive sheave 2 side of the control device 4 at a position obliquely above the drive sheave 2. On the side of the driving sheave 2 of the brake lining 5, a concave braking surface 5c having substantially the same curvature as the outer peripheral surface of the driving sheave 2 is provided, and the braking groove 5a having a semicircular cross section is formed on the braking surface 5c. Are formed in the same direction as the steel groove 2 a of the drive sheave 2. When the braking device is not braked, the main rope 3 wound around the driving sheave 2 and the braking groove 5a formed on the braking surface 5c are arranged to have a predetermined gap. 4, the brake lining 5 is pressed toward the center of the driving sheave 2, that is, substantially perpendicular to the main rope 3, and the braking groove 5 a provided on the braking surface 5 c is wound around the driving sheave 2. The main rope 3 is engaged to generate a frictional force for braking. As shown in FIG. 4, the braking surface 5 c provided on the brake lining 5 and the outer peripheral surface of the drive sheave 2 are not in contact with each other during braking.

この発明の実施の形態1によれば、ブレーキ装置が薄型巻上機1の駆動綱車2設置面内で駆動綱車2の突出範囲内に配置されているため、薄型巻上機1の全体の寸法を変更することなく、ブレーキ装置を巻上機外部に設置することができる。したがって、薄型巻上機1を従来の設置スペースに設けることができるとともに、組立及び保守の作業効率が向上するため、コスト削減が可能となる。さらに、薄型巻上機1の本体内部にブレーキ装置を設置する空間が必要ないため、本体部の更なる薄型化、巻上機自体の小型化も可能となる。また、制動時に駆動綱車2に巻き掛けられた主索3と制動溝5aとが係合することによって制動力を発生させるため、従来のような含油された鋼製の主索3ではなく、樹脂(例えば、ウレタン樹脂)で被覆されているような高い摩擦係数を有する主索3を使用する場合には、大きな制動力を得ることが可能となる。このような主索3を使用する場合には、鋼溝2aと主索3との間に発生する摩擦力も大きくなるため、駆動綱車2の小型化が可能となり、ブレーキ装置の設置場所を容易に確保することができ、特に有効である。   According to the first embodiment of the present invention, the brake device is disposed within the protruding range of the drive sheave 2 within the drive sheave 2 installation surface of the thin hoist 1, so that the entire thin hoist 1 is The brake device can be installed outside the hoisting machine without changing the dimensions of the hoisting machine. Therefore, the thin hoist 1 can be provided in the conventional installation space, and the work efficiency of assembly and maintenance is improved, so that the cost can be reduced. Furthermore, since a space for installing the brake device is not required inside the main body of the thin hoisting machine 1, the main body can be further thinned and the hoisting machine itself can be downsized. Moreover, in order to generate a braking force by engaging the main rope 3 wound around the driving sheave 2 and the braking groove 5a at the time of braking, instead of the conventional oil-impregnated steel main rope 3, When the main rope 3 having a high coefficient of friction that is covered with a resin (for example, urethane resin) is used, a large braking force can be obtained. When such a main rope 3 is used, the frictional force generated between the steel groove 2a and the main rope 3 also increases, so that the drive sheave 2 can be miniaturized and the installation location of the brake device is easy. This is particularly effective.

実施の形態2.
図5はこの発明の実施の形態2におけるエレベータ用ブレーキ装置の斜視図、図6はその要部詳細図、図7はブレーキ装置非動作時の図6のB−B断面図、図8はブレーキ装置動作時の図6のB−B断面図である。
Embodiment 2. FIG.
5 is a perspective view of an elevator brake device according to Embodiment 2 of the present invention, FIG. 6 is a detailed view of the main part thereof, FIG. 7 is a cross-sectional view taken along line BB of FIG. 6 when the brake device is not operated, and FIG. It is BB sectional drawing of FIG. 6 at the time of apparatus operation | movement.

図において、制御装置4は、駆動綱車2下方の主索3間に設置され、薄型巻上機1の駆動綱車2設置面内で、且つ駆動綱車2の突出範囲内に収められている。また、制御装置4の上部となる駆動綱車2側には、ブレーキライニング5が設けられている。このブレーキライニング5の上面には、駆動綱車2の外周面と略同曲率の凹状の制動面5cが設けられ、この制動面5cに、断面が鋼溝2aと略同形状の半円状を呈した凸部5bが鋼溝2aと同方向に複数形成されている。ブレーキ装置非制動時には、駆動綱車2の鋼溝2aと制動面5cに形成された凸部5bとが所定の間隙を有するように配置されている。また、制動の際には、制御装置4によってブレーキライニング5が上方、つまり鋼溝2aに対してはほぼ垂直方向に押し付けられ、凸部5bが、駆動綱車2の主索3の巻き掛けられていない鋼溝2aに係合し、さらに制動面5cが駆動綱車2の外周面に係合して、制動のための摩擦力が発生する。なお、その他の構成は実施の形態1と同様になっている。   In the figure, the control device 4 is installed between the main ropes 3 below the driving sheave 2, and is housed within the driving sheave 2 installation surface of the thin hoist 1 and within the protruding range of the driving sheave 2. Yes. A brake lining 5 is provided on the drive sheave 2 side, which is the upper part of the control device 4. On the upper surface of the brake lining 5, a concave braking surface 5c having substantially the same curvature as that of the outer peripheral surface of the drive sheave 2 is provided. The braking surface 5c has a semicircular shape having a cross section substantially the same shape as the steel groove 2a. A plurality of the projected portions 5b are formed in the same direction as the steel grooves 2a. When the brake device is not braked, the steel groove 2a of the driving sheave 2 and the convex portion 5b formed on the braking surface 5c are arranged so as to have a predetermined gap. During braking, the brake lining 5 is pressed upward by the control device 4, that is, in a substantially vertical direction against the steel groove 2a, and the convex portion 5b is wound around the main rope 3 of the drive sheave 2. The brake groove 5a is engaged with the outer circumferential surface of the drive sheave 2 and the frictional force for braking is generated. Other configurations are the same as those in the first embodiment.

この発明の実施の形態2によれば、制動時に、駆動綱車2の鋼溝2aと制動面5cに設けられた凸部5bとが係合し、さらに駆動綱車2の外周面と制動面5cとが係合することによって制動力が発生するため、実施の形態1のように鋼溝2aと主索3との摩擦係数及び主索3と制動溝5aとの摩擦係数の両方を考慮する必要がなく、制動力の管理が容易となる。さらに、制動時に主索3に対して余計な負荷が作用せず、主索3の長期使用も可能となる。   According to Embodiment 2 of the present invention, during braking, the steel groove 2a of the drive sheave 2 and the convex portion 5b provided on the brake surface 5c are engaged, and the outer peripheral surface of the drive sheave 2 and the brake surface Since the braking force is generated by the engagement with 5c, both the friction coefficient between the steel groove 2a and the main rope 3 and the friction coefficient between the main rope 3 and the braking groove 5a are considered as in the first embodiment. There is no need to manage the braking force easily. Further, an extra load does not act on the main rope 3 during braking, and the main rope 3 can be used for a long time.

なお、この発明の実施の形態では、制動力を発生させるために薄型巻上機1の駆動綱車2aが使用されているが、綱車に巻き掛けられた主索3又は綱車の鋼溝2aにブレーキライニング5を押し付けて制動力を発生することができれば、実施例に限らず同様の効果を得ることができる。したがって、種々の巻上機の駆動綱車2や、そらせ車の綱車にブレーキ装置を設置しても良い。また、上記の理由から、ブレーキライニング5が設けられている制御装置4も巻上機自体に設ける必要はなく、例えば巻上機が設置されている固定台等に設ける構成としてもこの発明と同様の効果を得ることは可能である。 In the embodiment of the present invention, the driving sheave 2a of the thin hoist 1 is used to generate the braking force. However, the main rope 3 wound around the sheave or the steel groove of the sheave is used. If the brake lining 5 can be pressed against 2a to generate a braking force, the same effect can be obtained without being limited to the embodiment. Therefore, you may install a brake device in the driving sheave 2 of various hoisting machines, and the sheave of a baffle. For the above reason, the control device 4 provided with the brake lining 5 does not need to be provided in the hoisting machine itself. It is possible to obtain the effect.

この発明の実施の形態1におけるエレベータ用ブレーキ装置の斜視図である。It is a perspective view of the brake device for elevators in Embodiment 1 of this invention. この発明の実施の形態1におけるエレベータ用ブレーキ装置の要部詳細図である。It is a principal part detail drawing of the brake device for elevators in Embodiment 1 of this invention. この発明の実施の形態1におけるブレーキ装置非動作時の図2のA−A断面図である。It is AA sectional drawing of FIG. 2 at the time of the brake device non-operation in Embodiment 1 of this invention. この発明の実施の形態1におけるブレーキ装置動作時の図2のA−A断面図である。It is AA sectional drawing of FIG. 2 at the time of the brake device operation | movement in Embodiment 1 of this invention. この発明の実施の形態2におけるエレベータ用ブレーキ装置の斜視図である。It is a perspective view of the brake device for elevators in Embodiment 2 of this invention. この発明の実施の形態2におけるエレベータ用ブレーキ装置の要部詳細図である。It is principal part detail drawing of the brake device for elevators in Embodiment 2 of this invention. この発明の実施の形態2におけるブレーキ装置非動作時の図6のB−B断面図である。It is BB sectional drawing of FIG. 6 at the time of the brake device non-operation in Embodiment 2 of this invention. この発明の実施の形態2におけるブレーキ装置動作時の図6のB−B断面図である。It is BB sectional drawing of FIG. 6 at the time of the brake device operation | movement in Embodiment 2 of this invention.

1 薄型巻上機
2 駆動綱車
2a 鋼溝
3 主索
4 制御装置
5 ブレーキライニング
5a 制動溝
5b 凸部
5c 制動面
DESCRIPTION OF SYMBOLS 1 Thin hoist 2 Drive sheave 2a Steel groove 3 Main rope 4 Control device 5 Brake lining 5a Brake groove 5b Protruding part 5c Brake surface

Claims (7)

エレベータのかご及び釣合い重りを懸吊する主索と、
エレベータの薄型巻上機の本体部と、
前記本体部の一面に設けられ、前記主索が巻き掛けられた駆動綱車と、
制動時に前記駆動綱車に巻き掛けられた前記主索に係合することによって制動のための摩擦力を発生させるブレーキライニングと、
このブレーキライニングの動きを制御する制御装置と
を備え
前記制御装置は、前記本体部の前記一面内で且つ前記駆動綱車の前記一面からの突出範囲内からなる前記薄型巻上機の外形上の引退部に収められたことを特徴とするエレベータ装置
A main rope for suspending an elevator car and a counterweight;
The main body of the elevator hoisting machine,
A driving sheave provided on one surface of the main body and around which the main rope is wound;
A brake lining that generates a frictional force for braking by engaging the main rope wound around the drive sheave during braking;
A control device for controlling the movement of the brake lining ,
Wherein the control device, the elevator device being characterized in that housed in retirement unit on the outer shape of the flat type hoist consisting of a projecting range of the one surface of the and the traction sheave in a surface of the body portion .
前記ブレーキライニングは、前記主索と係合する制動溝を有することを特徴とした請求項1に記載のエレベータ装置The elevator apparatus according to claim 1, wherein the brake lining includes a braking groove that engages with the main rope. エレベータのかご及び釣合い重りを懸吊する主索と、
エレベータの薄型巻上機の本体部と、
前記本体部の一面に設けられ、前記主索が巻き掛けられた駆動綱車と、
制動時に前記主索の巻き掛けられていない前記駆動綱車の外周部に係合することによって制動のための摩擦力を発生させるブレーキライニングと、
このブレーキライニングの動きを制御する制御装置と
を備え
前記制御装置は、前記本体部の前記一面内で且つ前記駆動綱車の前記一面からの突出範囲内からなる前記薄型巻上機の外形上の引退部に収められたことを特徴とするエレベータ装置
A main rope for suspending an elevator car and a counterweight;
The main body of the elevator hoisting machine,
A driving sheave provided on one surface of the main body and around which the main rope is wound;
A brake lining that generates a frictional force for braking by engaging with an outer peripheral portion of the drive sheave that is not wound around the main rope during braking;
A control device for controlling the movement of the brake lining ,
Wherein the control device, the elevator device being characterized in that housed in retirement unit on the outer shape of the flat type hoist consisting of a projecting range of the one surface of the and the traction sheave in a surface of the body portion .
前記ブレーキライニングは、前記駆動綱車の外周部に設けられた鋼溝と係合する凸部を有することを特徴とした請求項3に記載のエレベータ装置The elevator apparatus according to claim 3, wherein the brake lining has a convex portion that engages with a steel groove provided on an outer peripheral portion of the drive sheave. 前記ブレーキライニングは、制動時に前記主索又は前記外周部に対して垂直方向に押圧することを特徴とした請求項1から請求項4の何れかに記載のエレベータ装置The elevator device according to any one of claims 1 to 4, wherein the brake lining presses the main rope or the outer peripheral portion in a vertical direction during braking. 前記薄型巻上機は、エレベータの昇降路内に設置されたことを特徴とする請求項1から請求項5の何れかに記載のエレベータ装置。The elevator apparatus according to any one of claims 1 to 5, wherein the thin hoist is installed in an elevator hoistway. 前記主索は、樹脂により被覆されていることを特徴とする請求項1から請求項の何れかに記載のエレベータ装置The elevator apparatus according to any one of claims 1 to 6 , wherein the main rope is covered with a resin.
JP2003367209A 2003-10-28 2003-10-28 Elevator equipment Expired - Fee Related JP4397672B2 (en)

Priority Applications (1)

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JP2003367209A JP4397672B2 (en) 2003-10-28 2003-10-28 Elevator equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003367209A JP4397672B2 (en) 2003-10-28 2003-10-28 Elevator equipment

Publications (2)

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JP2005132508A JP2005132508A (en) 2005-05-26
JP4397672B2 true JP4397672B2 (en) 2010-01-13

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Family Applications (1)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102674118A (en) * 2012-02-16 2012-09-19 郭自刚 Elevator traction machine of steel wire rope antiskid device
CN109611468A (en) * 2018-12-31 2019-04-12 河北百龙汽车配件制造有限公司 A kind of hydraulic disc brake brake disc

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