JP4113760B2

JP4113760B2 - Elevator equipment

Info

Publication number: JP4113760B2
Application number: JP2002320248A
Authority: JP
Inventors: 覚加藤
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2002-11-01
Filing date: 2002-11-01
Publication date: 2008-07-09
Anticipated expiration: 2022-11-01
Also published as: JP2004155519A

Description

【０００１】
【発明の属する技術分野】
この発明は、昇降路の一つの昇降経路に二台のかごが配置されて、これらのかごが互いに連係してそれぞれ運転されるエレベーター装置に関する。
【０００２】
【従来の技術】
一つの昇降経路に複数台のかごが配置されて、これらのかごが互いに連係してそれぞれ運転されるワンシャフトマルチカーエレベーターは従来、次に述べるように構成されていた。すなわち、上側エレベーター用巻上機の駆動により上側巻上ロープを介して上側つり合おもりと対向して走行し、中央部に上下に貫通するロープダクトが設けられた上側エレベーターかごが設けられる。
【０００３】
また、前記上側エレベーターかごと同一の昇降路内においてこの上側エレベーターかごの下方に位置し、下側エレベーター用巻上機の駆動により上側エレベーターかごの中央部のロープダクトを貫通する下側巻上ロープを介して下側つり合おもりと対向して走行して上側エレベーターかごと別個独立に走行可能な下側エレベーターかごとが設けられている（例えば、特許文献１参照。）。
【０００４】
【特許文献１】
特開平５−２０１６５３号公報（第２頁、図１、図２）
【０００５】
【発明が解決しようとする課題】
前述の従来のエレベーター装置、すなわちワンシャフトマルチカーエレベーターでは、一つの昇降経路に二台のかごを配置してそれぞれ昇降運転する場合に、二台のかごの運転方向、運転速度、運転位置をそれぞれ確認しながら協調して制御して二台のかごの相互が異常接近する不具合を防ぐようになっている。しかし、巻上機の駆動綱車と巻上ロープとの間の滑り等の不測の事態が発生したときには、二台のかごが相互に異常接近する不具合が生じるという問題点があった。
【０００６】
この発明は、かかる問題点を解消するためになされたものであり、一つの昇降経路を昇降する二台のかご相互における異常接近を防ぐエレベーター装置を得ることを目的とする。
【０００７】
【課題を解決するための手段】
この発明に係るエレベーター装置においては、昇降路の所定経路を昇降する第一かごと、昇降路近くに設けられた第一巻上機に巻掛けられ、一端に第一かごが連結されて他端には昇降路を昇降する第一つり合おもりが連結された第一主索と、第一かごと同じ所定経路を昇降し第一かごの下側に配置された第二かごと、昇降路近くに設けられた第二巻上機に巻掛けられ、一端に第二かごが連結されて他端には第一つり合おもりの上側に配置されて昇降路を昇降する第二つり合おもりが連結され、第一かご及び第二かごが相互に所定間隔を超えて接近したときに第一つり合おもり及び第二つり合おもりが相互に行き当たる長さに張設された第二主索とが設けられる。
【０００８】
【発明の実施の形態】
実施の形態１．
図１は、この発明の実施の形態の一例を概念的に示す斜視図である。図において、昇降路１の上端寄りに第一巻上機２が設けられ、また図示が省略してあるが昇降路１に立設された案内レールが設けられ、この案内レールに案内されて所定経路を昇降する第一かご３が設けられる。そして、第一主索４が第一巻上機２の駆動綱車及び第一巻上機２に近接して設けられたそらせ車５に巻掛けられて張設され、一端に第一かご３が連結されて他端には昇降路１を昇降する第一つり合おもり６が連結される。
【０００９】
また、昇降路１の第一巻上機２位置よりも上側に第二巻上機７が設けられ、また第二かご８が第一かご３の下側に配置され、第二かご８は第一かご３が案内される案内レールに案内されて第一かご３と同じ所定経路を昇降する。そして、昇降路１を昇降する第二つり合おもり９が、第一つり合おもり６の上側に配置される。
【００１０】
そして、第二主索１０が第二巻上機７の駆動綱車及び第二巻上機７に近接して設けられたそらせ車１１に巻掛けられて張設され、一端に第二かご８が連結されて第一かご３の両側を経て配置され、他端に第二つり合おもり９が連結される。また、第二主索１０は第一かご３及び第二かご８が相互に所定間隔を超えて接近したときに、第一つり合おもり６及び第二つり合おもり９が相互に行き当たる長さに張設される。
【００１１】
なお、第一主索４は第二つり合おもり９に設けられた上下方向の貫通孔に挿通されて吊設される。そして、緩衝器１２が第一つり合おもり６に設けられて上方に突出し、第二つり合おもり９の下面と対向して配置される。
【００１２】
上記のように構成されたエレベーター装置において、昇降路１の一つの昇降経路に第一かご３及び第二かご８の両者を配置して、それぞれのかごの運転方向、運転速度、運転位置をそれぞれ確認しながら協調して制御して上記両者の相互が異常接近しないように運転される。そして第二主索１０の長さが、上記両者が相互に所定間隔を超えて接近したときに、第一つり合おもり６及び第二つり合おもり９の双者が相互に行き当たる長さに設定される。
【００１３】
このため、第一巻上機２、第二巻上機７の駆動綱車と、その駆動綱車に巻掛けられた主索との間における滑り発生等の不測の事態によって、上記両者が相互に所定間隔を超えて接近したときに上記双者が相互に行き当たる。これにより、上記両者が相互に異常接近する不具合の発生を未然に防ぐことができる。
【００１４】
また、第一つり合おもり６に緩衝器１２が上方に突出して設けられて、第二つり合おもり９の下面と対向して配置される。このため、上記両者が相互に所定間隔を超えて接近したときに上記双者が相互に行き当たるときの衝撃が緩衝される。これにより、上記双者の変形等の発生を防ぐことができ、また上記双者が相互に行き当たることによって上記両者に生じる衝撃力を軽減することができる。
【００１５】
また、緩衝器１２が第二つり合おもり９の下面から下方に突出して設けられて、第一つり合おもり６の上面と対向して配置された構成であっても、図１の実施の形態における作用を得ることができる。
【００１６】
実施の形態２．
図２〜図４は、この発明の他の実施の形態の一例を示す図で、図２はエレベーターの要部を概念的に示す斜視図、図３は図２のエレベーターの機器の配置及び機器の電気的接続を概念的に示す図、図４は図２のエレベーターの他の機器の配置及びその機器の電気的接続を概念的に示す図である。図において、前述の図１と同符号は相当部分を示す。
【００１７】
そして、昇降路１に第一検出装置１３が設けられ、第一検出装置１３は昇降路１の上方に枢着された駆動車１４、昇降路１の下方に配置された張り車１５、無端状をなし駆動車１４及び張り車１５に巻掛けられて一側が第一かご３に連結された巻掛条体１６並びに駆動車１４によって駆動される第一検出器１７によって形成される。
【００１８】
また、昇降路１に第二検出装置１８が設けられ、第二検出装置１８は昇降路１の上方に枢着された駆動車１９、昇降路１の下方に配置された張り車２０、無端状をなし駆動車１９及び張り車２０に巻掛けられて一側が第二かご８に連結された巻掛条体２１並びに駆動車１９によって駆動される第二検出器２２によって形成される。
【００１９】
そして、第一検出器１７に第一位置演算器２３及び第一速度演算器２４が接続され、第二検出器２２に第二位置演算器２５及び第二速度演算器２６が接続される。また、第一減算器２７が第一位置演算器２３及び第二位置演算器２５に接続され、第二減算器２８が第一速度演算器２４及び第二速度演算器２６に接続される。
【００２０】
また、判定装置２９が設けられて第一速度演算器２４、第二速度演算器２６、第一減算器２７及び第二減算器２８が接続される。そして、判定装置２９に接続された第一制御装置３０が設けられて第一巻上機２の電動機３１及び制動機３２に接続され、また判定装置２９に接続された第二制御装置３３が設けられて第二巻上機７の電動機３４及び制動機３５に接続される。
【００２１】
また、第一速度演算器２４に接続された第一制動距離演算器３６、第二速度演算器２６に接続された第二制動距離演算器３７が設けられる。そして、第一制動距離演算器３６及び第二制動距離演算器３７に接続された第三減算器３８が設けられ、また第二減算器２８及び第三減算器３８が接続されて判定装置２９に接続された比較器３９が設けられる。
【００２２】
上記のように構成されたエレベーター装置において、昇降路１の一つの昇降経路に第一かご３及び第二かご８の両者を配置して、それぞれのかごの運転方向、運転速度、運転位置をそれぞれ確認しながら協調して制御し上記両者の相互が異常接近しないように運転される。
【００２３】
そして、上記両者が相互に所定間隔を超えて接近したときに、第二主索１０の長さが第一つり合おもり６及び第二つり合おもり９の双者が相互に行き当たる長さに設定される。また、第一つり合おもり６に緩衝器１２が設けられて、第二つり合おもり９に対向して配置される。したがって、詳細な説明を省略するが図２〜図４の実施の形態においても図１の実施の形態と同様な作用が得られる。
【００２４】
また、図２〜図４の実施の形態において、第一検出器１７の動作による第一かご３に関わる信号から第一位置演算器２３により第一かご３の昇降路１における絶対位置ｙ_Ｕが演算され、また第一速度演算器２４により第一かご３の速度ｖ_Ｕが演算される。そして、第二検出器２２の動作による第二かご８に関わる信号から第二位置演算器２５により第二かご８の昇降路１における絶対位置ｙ_Ｌが演算され、また第二速度演算器２６により第二かご８の速度ｖ_Ｌが演算される。
【００２５】
そして、第二かご８を基準とした場合の第一かご３と第二かご８との相対位置は、第一減算器２７により第一かご３の絶対位置から第二かご８の絶対位置を減算することによって算出される。また、第二かご８を基準とした場合の第一かご３と第二かご８との相対速度は、第二減算器２８により第一かご３の絶対速度から第二かご８の絶対速度を減算することによって算出される。
【００２６】
このようにして得られた第一かご３の速度ｖ_Ｕ、第二かご８の速度ｖ_Ｌ、第一かご３と第二かご８の相対位置（ｙ_Ｕ−ｙ_Ｌ）及び第一かご３と第二かご８の相対速度（ｖ_Ｕ−ｖ_Ｌ）が判定装置２９へ入力される。
また、判定装置２９での判定が次に述べるように行われる。すなわち、第一かご３と第二かご８の両者の相対位置及び相対速度は第二かご８を基準として算出し、この場合に相対速度が正のときは第二かご８から第一かご３が離れる方向に移動するので上記両者に異常接近が生じることはない。
【００２７】
しかし、上記両者の相対速度が負のときは上記両者が互いに接近する方向に移動するが、上記両者相互間の距離が十分長い場合は相対速度が負であっても不都合が発生することはない。しかし、上記両者相互間の距離が短い場合には上記両者相互の異常接近が生じる可能性が生じてくる。
【００２８】
そして、上記両者の相対速度が負の場合における上記両者の異常接近が生じる可能性の有無の判定が次に述べるようにして行われる。すなわち、第一かご３が速度ｖ_Ｕから非常制動されて停止するまでに移動する距離を第一制動距離演算器３６によって演算してその結果をｙ_ＵＥとする。また、第二かご８が速度ｖ_Ｌから非常制動されて停止するまでに移動する距離を第二制動距離演算器３７によって演算してその結果をｙ_ＬＥとする。
【００２９】
そして、上記両者の制動距離の差（ｙ_ＵＥ−ｙ_ＬＥ）を減算器３８によって算出し、この制動距離の差（ｙ_ＵＥ−ｙ_ＬＥ）とその時の相対距離（ｙ_Ｕ−ｙ_Ｌ）との差を比較器３９によって比較する。この比較結果が負の場合は、上記両者の少なくとも一方を昇降させると異常接近が生じる可能性があるので、比較器３９の負の出力によって判定装置２９が動作し急停止指令が発せられる。
【００３０】
この判定装置２９の急停止指令によって、第一制御装置３０を介して第一巻上機２の電動機３１が消勢され、また制動機３２が制動動作し、また第二制御装置３３を介して第二巻上機７の電動機３４が消勢され、また制動機３５が制動動作する。これによって、上記両者が相互に異常接近する不具合の発生を未然に防ぐことができる。
【００３１】
なお、図３及び図４に示す上記両者の異常接近防止制御回路を、エレベーター一般の制御回路とは別に独立回路として設置する。そして、異常接近防止制御回路により上記両者に関わる距離や速度を検定することによって、上記両者の異常接近発生を一層確実に防止することができる。
【００３２】
また、図２〜図４の実施の形態における第一かご３及び第二かご８の両者の異常接近防止制御回路を、昇降路１の一つの昇降経路に三台以上のかごが配置されたワンシャフトマルチカーエレベーターに容易に応用することができる。これによって、一つの昇降経路に三台以上のかごが配置されたワンシャフトマルチカーエレベーターからなるエレベーター装置において、かごが相互に異常接近する不具合の発生を未然に防ぐことができる。
【００３３】
【発明の効果】
この発明は以上説明したように、昇降路の所定経路を昇降する第一かごと、昇降路近くに設けられた第一巻上機に巻掛けられ、一端に第一かごが連結されて他端には昇降路を昇降する第一つり合おもりが連結された第一主索と、第一かごと同じ所定経路を昇降し第一かごの下側に配置された第二かごと、昇降路近くに設けられた第二巻上機に巻掛けられ、一端に第二かごが連結されて他端には第一つり合おもりの上側に配置されて昇降路を昇降する第二つり合おもりが連結され、第一かご及び第二かごが相互に所定間隔を超えて接近したときに第一つり合おもり及び第二つり合おもりが相互に行き当たる長さに張設された第二主索とを設けたものである。
【００３４】
これによって、昇降路１の一つの昇降経路に第一かご及び第二かごの両者を配置して、それぞれのかごの運転方向、運転速度、運転位置をそれぞれ確認しながら協調して制御して上記両者の相互が異常接近しないように運転される。そして、不測の事態発生によって上記両者が相互に所定間隔を超えて接近したときに、第二主索の長さが第一つり合おもり及び第二つり合おもりの双者が相互に行き当たる長さに設定される。このため、不測の事態発生時に上記両者が相互に所定間隔を超えて接近したときに上記双者が相互に行き当たる。これにより、上記両者が相互に異常接近する不具合の発生を未然に防ぐ効果がある。
【図面の簡単な説明】
【図１】この発明の実施の形態１を概念的に示す斜視図。
【図２】この発明の実施の形態２を示す図で、エレベーターの要部を概念的に示す斜視図。
【図３】図２のエレベーターの機器の配置及び機器の電気的接続を概念的に示す図。
【図４】図２のエレベーターの他の機器の配置及びその機器の電気的接続を概念的に示す図。
【符号の説明】
１昇降路、２第一巻上機、３第一かご、４第一主索、６第一つり合おもり、７第二巻上機、８第二かご、９第二つり合おもり、１０第二主索、１２緩衝器、１７第一検出器、２２第二検出器、２９判定装置、３２第一制動機、３５第二制動機。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevator apparatus in which two cars are arranged in one hoisting path of a hoistway and these cars are operated in cooperation with each other.
[0002]
[Prior art]
Conventionally, a one-shaft multi-car elevator in which a plurality of cars are arranged in one elevating path and these cars are operated in cooperation with each other has been configured as described below. That is, there is provided an upper elevator car that runs opposite to the upper counterweight via the upper hoisting rope by driving the upper elevator hoisting machine and is provided with a rope duct penetrating vertically in the center.
[0003]
Further, the lower hoisting rope that is located below the upper elevator car in the same hoistway with the upper elevator car and that passes through the rope duct at the center of the upper elevator car by driving the lower elevator hoisting machine. There is provided a lower elevator car that runs opposite to the lower counterweight and can travel independently of the upper elevator car (see, for example, Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 5-201653 (second page, FIGS. 1 and 2)
[0005]
[Problems to be solved by the invention]
In the above-described conventional elevator device, that is, a one-shaft multi-car elevator, when two cars are arranged in one lifting path and each is operated for lifting, the driving direction, driving speed, and driving position of the two cars are respectively set. It is designed to prevent problems that the two cars are abnormally close to each other by controlling them in concert. However, when an unexpected situation such as a slip between the driving sheave of the hoisting machine and the hoisting rope occurs, there is a problem that the two cars become abnormally close to each other.
[0006]
The present invention has been made to solve such a problem, and an object of the present invention is to obtain an elevator apparatus that prevents an abnormal approach between two cars moving up and down one lifting path.
[0007]
[Means for Solving the Problems]
In the elevator apparatus according to the present invention, the first car that moves up and down the predetermined path of the hoistway, the first hoisting machine provided near the hoistway is wound, the first car is connected to one end, and the other end The first main rope connected with the first counterweight that moves up and down the hoistway, the second car placed on the lower side of the first car by raising and lowering the same predetermined route as the first car, near the hoistway The second car is wound around the second hoisting machine provided at the end, the second car is connected to one end, and the other end is connected to the other end of the second counterweight which is arranged above the first counterweight and moves up and down the hoistway And the second main rope stretched to such a length that the first counterweight and the second counterweight reach each other when the first car and the second car approach each other beyond a predetermined distance. Provided.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a perspective view conceptually showing an example of the embodiment of the present invention. In the figure, a first hoisting machine 2 is provided near the upper end of the hoistway 1, and a guide rail standing on the hoistway 1 is provided, although not shown, is guided by the guide rail and is predetermined. A first car 3 that moves up and down the path is provided. Then, the first main rope 4 is wound and stretched around the driving sheave of the first hoisting machine 2 and the deflecting wheel 5 provided in the vicinity of the first hoisting machine 2, and the first car 3 at one end. And the other end is connected to a first counterweight 6 that moves up and down the hoistway 1.
[0009]
Further, a second hoisting machine 7 is provided above the position of the first hoisting machine 2 in the hoistway 1, a second car 8 is arranged below the first car 3, and the second car 8 is It is guided by the guide rail to which the car 3 is guided, and moves up and down along the same predetermined route as the first car 3. And the 2nd counterweight 9 which raises / lowers the hoistway 1 is arrange | positioned above the 1st counterweight 6. FIG.
[0010]
And the 2nd main rope 10 is wound around the driving sheave of the 2nd hoisting machine 7, and the sled wheel 11 provided in the vicinity of the 2nd hoisting machine 7, and is stretched, and the second car 8 is attached to one end. Are connected to each other through both sides of the first car 3, and a second counterweight 9 is connected to the other end. The length of the second main rope 10 is such that the first counterweight 6 and the second counterweight 9 meet each other when the first car 3 and the second car 8 approach each other beyond a predetermined distance. Is stretched.
[0011]
The first main rope 4 is suspended by being inserted into a vertical through hole provided in the second counterweight 9. A shock absorber 12 is provided on the first counterweight 6 and protrudes upward, and is disposed to face the lower surface of the second counterweight 9.
[0012]
In the elevator apparatus configured as described above, both the first car 3 and the second car 8 are arranged in one hoisting path of the hoistway 1, and the driving direction, driving speed, and driving position of each car are respectively set. The system is operated so as to prevent the two from approaching abnormally by cooperating with confirmation. The length of the second main rope 10 is such that the first and second counterweights 6 and 9 come into contact with each other when the two approach each other beyond a predetermined distance. Is set.
[0013]
For this reason, both of the above are caused by unexpected situations such as slippage between the driving sheave of the first hoisting machine 2 and the second hoisting machine 7 and the main rope wound around the driving sheave. When the two approach each other over a predetermined interval, the two persons meet each other. As a result, it is possible to prevent the occurrence of a problem that the above two abnormally approach each other.
[0014]
Further, a shock absorber 12 is provided on the first counterweight 6 so as to protrude upward, and is disposed to face the lower surface of the second counterweight 9. For this reason, when the two approach each other beyond a predetermined distance, the shock when the two persons face each other is buffered. Thereby, generation | occurrence | production of the deformation | transformation etc. of the said two persons can be prevented, and the impact force which arises in the said both when the said two persons contact each other can be reduced.
[0015]
Further, even if the shock absorber 12 is provided so as to protrude downward from the lower surface of the second counterweight 9 and is disposed to face the upper surface of the first counterweight 6, the embodiment of FIG. The effect in can be obtained.
[0016]
Embodiment 2. FIG.
2 to 4 are diagrams showing an example of another embodiment of the present invention. FIG. 2 is a perspective view conceptually showing a main part of the elevator. FIG. 3 is an arrangement and devices of the elevator equipment shown in FIG. FIG. 4 is a diagram conceptually showing the arrangement of other devices in the elevator of FIG. 2 and the electrical connection of the devices. In the figure, the same reference numerals as those in FIG.
[0017]
And the 1st detection apparatus 13 is provided in the hoistway 1, the 1st detection apparatus 13 is the drive wheel 14 pivotally attached above the hoistway 1, the tension wheel 15 arrange | positioned under the hoistway 1, endless form It is formed by the winding detector 16 that is wound around the driving wheel 14 and the tensioning wheel 15 and is connected to the first car 3 on one side and the first detector 17 that is driven by the driving wheel 14.
[0018]
Further, the second detection device 18 is provided in the hoistway 1, and the second detection device 18 includes a drive vehicle 19 pivotally mounted above the hoistway 1, a tension wheel 20 disposed below the hoistway 1, and an endless shape. And a second detector 22 driven by the drive wheel 19 and a winding strip 21 wound on the drive wheel 19 and the tension wheel 20 and connected on one side to the second car 8.
[0019]
A first position calculator 23 and a first speed calculator 24 are connected to the first detector 17, and a second position calculator 25 and a second speed calculator 26 are connected to the second detector 22. The first subtractor 27 is connected to the first position calculator 23 and the second position calculator 25, and the second subtractor 28 is connected to the first speed calculator 24 and the second speed calculator 26.
[0020]
In addition, a determination device 29 is provided, and the first speed calculator 24, the second speed calculator 26, the first subtractor 27, and the second subtractor 28 are connected. A first control device 30 connected to the determination device 29 is provided and connected to the electric motor 31 and the brake 32 of the first hoisting machine 2, and a second control device 33 connected to the determination device 29 is provided. And connected to the motor 34 and the brake 35 of the second hoisting machine 7.
[0021]
A first braking distance calculator 36 connected to the first speed calculator 24 and a second braking distance calculator 37 connected to the second speed calculator 26 are provided. A third subtractor 38 connected to the first braking distance calculator 36 and the second braking distance calculator 37 is provided, and a second subtractor 28 and a third subtractor 38 are connected to the determination device 29. A connected comparator 39 is provided.
[0022]
In the elevator apparatus configured as described above, both the first car 3 and the second car 8 are arranged in one hoisting path of the hoistway 1, and the driving direction, driving speed, and driving position of each car are respectively set. The system is operated in a coordinated manner while confirming so that the two do not abnormally approach each other.
[0023]
And when both of the above approach each other beyond a predetermined distance, the length of the second main rope 10 is such that the two pairs of the first counterweight 6 and the second counterweight 9 meet each other. Is set. Further, the first counterweight 6 is provided with a shock absorber 12 and is disposed to face the second counterweight 9. Therefore, although the detailed description is omitted, the same operation as the embodiment of FIG. 1 can be obtained in the embodiment of FIGS.
[0024]
2 to 4, the absolute position y _U in the hoistway 1 of the first car 3 is determined by the first position calculator 23 from the signal related to the first car 3 due to the operation of the first detector 17. The speed v _U of the first car 3 is calculated by the first speed calculator 24. Then, the absolute position y _L in the hoistway 1 of the second car 8 is calculated by the second position calculator 25 from the signal related to the second car 8 by the operation of the second detector 22, and the second speed calculator 26 The speed v _L of the second car 8 is calculated.
[0025]
The relative position between the first car 3 and the second car 8 when the second car 8 is used as a reference is obtained by subtracting the absolute position of the second car 8 from the absolute position of the first car 3 by the first subtractor 27. It is calculated by doing. The relative speed between the first car 3 and the second car 8 when the second car 8 is used as a reference is obtained by subtracting the absolute speed of the second car 8 from the absolute speed of the first car 3 by the second subtractor 28. It is calculated by doing.
[0026]
The speed v _{U of} the first car 3, the speed v _L of the second car 8, the relative positions (y _U −y _L ) of the first car 3 and the second car 8, and the first car 3 thus obtained. The relative speed (v _U −v _L ) of the second car 8 is input to the determination device 29.
Further, the determination by the determination device 29 is performed as described below. That is, the relative position and relative speed of both the first car 3 and the second car 8 are calculated based on the second car 8, and in this case, when the relative speed is positive, the second car 8 to the first car 3 are Since they move away from each other, there is no abnormal approach between the two.
[0027]
However, when the relative speed between the two is negative, the two move toward each other, but when the distance between the two is sufficiently long, there is no inconvenience even if the relative speed is negative. . However, when the distance between the two is short, there is a possibility that the two may be abnormally close to each other.
[0028]
Then, whether or not there is a possibility of the abnormal approach between the two when the relative speed between the two is negative is determined as follows. That is, the results of the distance which the first car 3 is moved until the stop is emergency braking from a speed v _U is calculated by the first braking distance calculator 36 and y _UE. Further, the distance by which the second car 8 moves from the speed v _L until it is emergency braked and stops is calculated by the second braking distance calculator 37, and the result is set to y _LE .
[0029]
Then, the difference between the braking distances (y _UE −y _LE ) is calculated by the subtractor 38, and the difference between the braking distances (y _UE −y _LE ) and the relative distance (y _U −y _L ) at that time are calculated. The difference is compared by the comparator 39. If this comparison result is negative, there is a possibility that abnormal approach may occur if at least one of the two is raised or lowered. Therefore, the determination device 29 is operated by the negative output of the comparator 39 to issue a sudden stop command.
[0030]
In response to the sudden stop command from the determination device 29, the electric motor 31 of the first hoisting machine 2 is deenergized via the first control device 30, the brake 32 is braked, and via the second control device 33. The electric motor 34 of the second hoisting machine 7 is de-energized, and the brake 35 is braked. As a result, it is possible to prevent the occurrence of a problem that the above two abnormally approach each other.
[0031]
In addition, both the above-mentioned abnormal approach prevention control circuit shown in FIG.3 and FIG.4 is installed as an independent circuit separately from the control circuit of a general elevator. Then, by checking the distance and speed related to the both by the abnormal approach prevention control circuit, it is possible to more reliably prevent the occurrence of the abnormal approach between the two.
[0032]
2 to 4, the abnormal access prevention control circuit for both the first car 3 and the second car 8 is a one in which three or more cars are arranged in one hoisting path of the hoistway 1. It can be easily applied to shaft multicar elevators. Thereby, in an elevator apparatus composed of a one-shaft multi-car elevator in which three or more cars are arranged in one lifting path, it is possible to prevent the occurrence of problems that the cars are abnormally close to each other.
[0033]
【The invention's effect】
As explained above, the present invention is wound around the first hoisting machine provided near the hoistway, the first car moving up and down the predetermined path of the hoistway, the first car is connected to one end and the other end The first main rope connected with the first counterweight that moves up and down the hoistway, the second car placed on the lower side of the first car by raising and lowering the same predetermined route as the first car, near the hoistway The second car is wound around the second hoisting machine provided at the end, the second car is connected to one end, and the other end is connected to the other end of the second counterweight which is arranged above the first counterweight and moves up and down the hoistway And a second main rope stretched to a length such that the first counterweight and the second counterweight reach each other when the first car and the second car approach each other beyond a predetermined distance. It is provided.
[0034]
As a result, both the first car and the second car are arranged in one hoisting path of the hoistway 1, and the operation direction, the operating speed, and the operating position of each car are confirmed and controlled in a coordinated manner. The two are operated so that they do not come close to each other. And when both of the above approach each other beyond a predetermined distance due to an unexpected situation, the length of the second main rope is the length that the first and second weights meet each other. Is set. For this reason, when the above-mentioned both approach each other exceeding a predetermined interval when an unexpected situation occurs, the above-mentioned two persons face each other. As a result, there is an effect of preventing the occurrence of a problem that the above two abnormally approach each other.
[Brief description of the drawings]
FIG. 1 is a perspective view conceptually showing Embodiment 1 of the present invention.
FIG. 2 is a diagram showing a second embodiment of the present invention, and is a perspective view conceptually showing a main part of an elevator.
FIG. 3 is a diagram conceptually showing the arrangement of the elevator equipment and the electrical connection of the equipment shown in FIG. 2;
4 is a diagram conceptually showing the arrangement of other devices in the elevator of FIG. 2 and the electrical connection of the devices.
[Explanation of symbols]
1 hoistway, 2 first hoisting machine, 3 first car, 4 first main rope, 6 first hoisting weight, 7 second hoisting machine, 8 second car, 9 second hoisting weight, 10 first Two main ropes, 12 shock absorbers, 17 first detector, 22 second detector, 29 determination device, 32 first brake, 35 second brake.

Claims

A first car that moves up and down a predetermined path of the hoistway is wound around a first hoisting machine provided near the hoistway, the first car is connected to one end, and the hoistway is raised and lowered to the other end. A first main rope connected to a first counterweight, a second car that is moved up and down the predetermined path and arranged below the first car, and a second winding provided near the hoistway The second car is connected to one end, the second car is connected to one end, and the other end is connected to the other end to the second counterweight that is disposed above the first counterweight and moves up and down the hoistway. An elevator comprising a second main rope stretched to such a length that the first counterweight and the second counterweight come into contact with each other when the car and the second car approach each other beyond a predetermined distance. apparatus.

A shock absorber is provided on one side of the first weight and the second weight and is disposed opposite to the other side, and includes a shock absorber for buffering the collision of the two. The elevator apparatus according to claim 1.

A first detector for detecting the behavior of the first car, a second detector for detecting the behavior of the second car, and the first and second cars operated by the outputs of the first detector and the second detector. When the relative distance and relative position between the two are calculated based on the respective positions and speeds of the two, the stop distance and the relative distance between the two are compared, and the two approach each other beyond a predetermined distance. And a determination device for issuing a command to operate at least one of the hoisting machines and to operate the one braking machine. The elevator apparatus as described in.