JP6568823B2 - Elevator hoisting machine centering device and centering method - Google Patents

Elevator hoisting machine centering device and centering method Download PDF

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JP6568823B2
JP6568823B2 JP2016100955A JP2016100955A JP6568823B2 JP 6568823 B2 JP6568823 B2 JP 6568823B2 JP 2016100955 A JP2016100955 A JP 2016100955A JP 2016100955 A JP2016100955 A JP 2016100955A JP 6568823 B2 JP6568823 B2 JP 6568823B2
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sheave
centering device
hoisting machine
centering
elevator hoisting
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JP2017206370A (en
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大典 篠原
大典 篠原
信克 大森
信克 大森
敦雄 佐藤
敦雄 佐藤
信幸 織田
信幸 織田
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Hitachi Building Systems Co Ltd
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Hitachi Building Systems Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical techniques
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/04Driving gear ; Details thereof, e.g. seals

Description

本発明は、エレベータ巻上機の芯出し装置に関する。   The present invention relates to a centering device for an elevator hoisting machine.

一般的なエレベータは、主ロープが巻き掛けられるシーブを有し、このシーブを回動させることで主ロープを介して、乗かごとつり合いおもりとを釣瓶式に昇降させる巻上機を備えている。また、シーブに巻き掛けられた主ロープは、その後所定の位置で垂下させるために、反らせ車(ビームプーリ)に巻き掛けられることが多い。   A general elevator has a sheave around which a main rope is wound, and is equipped with a hoisting machine that lifts and lowers a passenger car and a counterweight in a fishing bottle type through the main rope by rotating the sheave. . In addition, the main rope wound around the sheave is often wound around a curling wheel (beam pulley) in order to hang down at a predetermined position.

これらのシーブと反らせ車が平行に取り付けられていないと、主ロープの磨耗劣化を加速させる要因となることから、両者の平行を測定して位置調整を行う芯出し作業が必要であった。   If these sheaves and the curving wheel are not installed in parallel, it will cause a deterioration in the wear of the main rope. Therefore, it is necessary to perform a centering operation to adjust the position by measuring the parallelism of the two.

芯出しを行う従来の方法としては、二つのプーリー間に長尺の芯出し治具を取り付け、この芯出し治具と各プーリー間との距離寸法を調整することで、両者の芯出しを行う方法が提案されている(特許文献1参照)。   As a conventional method of centering, a long centering jig is attached between two pulleys, and the distance between the centering jig and each pulley is adjusted to center both. A method has been proposed (see Patent Document 1).

特開平11−63905号公報JP-A-11-63905

しかし、特許文献1の芯出し治具をエレベータ巻上機の芯出しに利用するには、シーブと反らせ車の距離に略等しい長尺の芯出し治具を準備しなければならず、エレベータの据付現場までの運搬性が悪く、広い保管スペースを必要とするなどの不都合がある。   However, in order to use the centering jig of Patent Document 1 for the centering of the elevator hoisting machine, a long centering jig substantially equal to the distance between the sheave and the curving wheel must be prepared. There are inconveniences such as poor transportability to the installation site and requiring a large storage space.

本発明は、上記不都合を解消し、運搬性、保管性に優れたエレベータ巻上機の芯出し装置を提供することを目的とする。   An object of the present invention is to provide an elevator hoisting machine centering device that eliminates the above-described disadvantages and is excellent in transportability and storage property.

上記目的を達成するため、本発明のエレベータ巻上機の芯出し装置は、乗かごに連結された主ロープが巻き掛けられるシーブと、前記主ロープが巻き掛けられる反らせ車と、を有するエレベータ巻上機の芯出し装置であって、前記シーブの側面に取り付けたときに下げ振り糸を押さえることで、前記シーブの側面と前記下げ振り糸を一定の距離に位置決めする棒状の位置決め部を切り欠き部に設けた略コ字状の固定部と、前記反らせ車の側面に取り付けられ、前記下げ振り糸を係合した状態で前記反らせ車と前記下げ振り糸の距離を調整する位置調整部と、前記下げ振り糸の端部に取り付けられ、該下げ振り糸に張力を付与する錘と、備えた。 In order to achieve the above object, a centering device for an elevator hoisting machine according to the present invention includes an elevator winding having a sheave around which a main rope connected to a car is wound, and a warping wheel around which the main rope is wound. a centering device for manufacturing machine, by pressing the swing yarn down when mounted on the side surface of the sheave, notched positioning portion of the rod-like positioning the plumb thread with the side surface of the sheave at a constant distance A substantially U-shaped fixing portion provided in a portion, a position adjusting unit that is attached to a side surface of the warping wheel and adjusts a distance between the warping wheel and the lowering yarn while engaged with the lowering yarn; A weight attached to an end portion of the downward swing yarn and imparting tension to the downward swing yarn.

本発明によれば、運搬性、保管性に優れたエレベータ巻上機の芯出し装置を提供できる。   ADVANTAGE OF THE INVENTION According to this invention, the centering apparatus of the elevator hoisting machine excellent in conveyance property and storage property can be provided.

一実施例のエレベータ巻上機の芯出し装置の全体構成を示す斜視図。The perspective view which shows the whole structure of the centering apparatus of the elevator hoisting machine of one Example. 図1の芯出し装置の全体構成を示す平面図(反らせ車が四溝)。The top view which shows the whole structure of the centering apparatus of FIG. 1 (a curvature wheel is four grooves). 図1の芯出し装置の全体構成を示す平面図(反らせ車が三溝)。The top view which shows the whole structure of the centering apparatus of FIG. 1 (a curvature wheel is three grooves). 固定部7の斜視図。The perspective view of the fixing | fixed part 7. FIG. 固定部7の正面図。The front view of the fixing | fixed part 7. FIG. 固定部7の底面図。The bottom view of the fixing | fixed part 7. FIG. 固定部7の側面図。The side view of the fixing | fixed part 7. FIG. スケール台8の斜視図。The perspective view of the scale stand 8. FIG. 取付け板8aの平面図。The top view of the attachment board 8a. 取付け板8aの側面図。The side view of the attachment board 8a. 取付け板8aの背面図。The rear view of the attachment board 8a. 位置調整部9の平面図Plan view of the position adjustment unit 9 位置調整部9の斜視図The perspective view of the position adjustment part 9 位置調整部9の斜視図The perspective view of the position adjustment part 9 位置調整部9の正面図Front view of the position adjustment unit 9 位置調整部9の背面図Rear view of the position adjustment unit 9 芯出し装置の芯出し手順を示す平面図Plan view showing the centering procedure of the centering device

以下、本発明の一実施例であるエレベータ巻上機の芯出し装置の構成を、図に基づき説明する。   Hereinafter, the configuration of an elevator hoisting machine centering apparatus according to an embodiment of the present invention will be described with reference to the drawings.

図1は本実施例の芯出し装置の全体構成を示す斜視図であり、図2はその平面図である。本実施例のエレベータは、図示しない乗かごとつり合いおもりとが主ロープ1により連結されており、主ロープ1を巻上機のシーブ2で駆動することで、乗かごが昇降する構成となっている。また、シーブ2に隣接して反らせ車3が設けてあり、主ロープ1が適切な位置に垂下するようになっている。   FIG. 1 is a perspective view showing the overall configuration of the centering device of the present embodiment, and FIG. 2 is a plan view thereof. In the elevator of this embodiment, a passenger car and a counterweight (not shown) are connected by a main rope 1, and the elevator car moves up and down by driving the main rope 1 with a sheave 2 of a hoisting machine. Yes. Further, a curling wheel 3 is provided adjacent to the sheave 2 so that the main rope 1 hangs down at an appropriate position.

前述した通り、主ロープ1の磨耗劣化を抑制するには、シーブ2と反らせ車3が平行になるように、また、両者の位置関係が所定の正規値に収まるように調整する必要がある。そこで、本実施例では、図1の斜視図に全体構成を示す芯出し装置を用いて両者の芯出し固定を行っている。   As described above, in order to suppress wear deterioration of the main rope 1, it is necessary to adjust so that the sheave 2 and the curving wheel 3 are parallel to each other and the positional relationship between the two is within a predetermined normal value. Therefore, in this embodiment, the centering and fixing are performed using a centering device whose overall configuration is shown in the perspective view of FIG.

図1および図2に示すように、この芯出し装置は、シーブ側面2aに脱着可能に固定される下げ振り本体4と、下げ振り本体4から引出される下げ振り糸5と、下げ振り糸5の先端部に設けられ下げ振り糸5に張力を与える錘6と、下げ振り本体4から引き出された下げ振り糸5をシーブ側面2aから一定の距離(例えば5mm)に固定する固定部7と、シーブ側面2aに脱着可能に固定され、固定部7から垂下する下げ振り糸5とシーブ側面2aの距離を測定するスケール台8と、反らせ車側面3aに設けられ下げ振り糸5が係合する位置調整部9と、から構成されている。なお、図2Aは反らせ車3が四溝の場合を示し、図2Bは反らせ車3が三溝の場合を示している。これらから明らかなように、反らせ車3の厚みが異なる場合であっても、位置調整部9の突出量を調整することで、下げ振り糸5と位置調整部9を同様の位置で係合させることができる。   As shown in FIGS. 1 and 2, the centering device includes a downward swing main body 4 that is detachably fixed to the sheave side surface 2 a, a downward swing yarn 5 that is drawn from the downward swing main body 4, and a downward swing yarn 5. A weight 6 that provides tension to the lowering pendulum 5 and a fixing part 7 that fixes the lowering pendulum 5 drawn from the lower swinging main body 4 at a certain distance (for example, 5 mm) from the sheave side surface 2a; A scale base 8 that measures the distance between the sheave side face 2a and a lower pendulum thread 5 that is detachably fixed to the sheave side face 2a and that hangs down from the fixing portion 7, and a position that is provided on the curving wheel side face 3a and engages with the lower pendulum thread 5 And an adjustment unit 9. 2A shows a case where the warping wheel 3 has four grooves, and FIG. 2B shows a case where the warping wheel 3 has three grooves. As is clear from these, even when the thickness of the warping wheel 3 is different, the downward swing thread 5 and the position adjusting unit 9 are engaged at the same position by adjusting the protruding amount of the position adjusting unit 9. be able to.

まず、図3を用いて固定部7を詳細に説明する。図3B〜Dの正面図、底面図、側面図に示すように、略コ字状の固定部7は、その底面二ヶ所に埋設された磁石部7aによってシーブ側面2aに着脱可能に固定することができる。また、切欠き部7cには棒状の位置決め部7bが設けられており、下げ振り糸5を位置決め部7bに当接させることで、図3Aの斜視図のように、下げ振り糸5をシーブ側面2aから一定の距離(例えば5mm)に位置決めできる。なお、本実施例では、位置決め部7bを棒状にすることで、下げ振り糸5と位置決め部7bの接触面積を小さくし、両者の接触面で生じる摩擦抵抗を小さくしたが、切欠き部7c自身の形状を下げ振り糸5との接触面積が小さくなるようにすれば、位置決め部7bを省略した固定部7としても良い。   First, the fixing part 7 will be described in detail with reference to FIG. As shown in the front view, bottom view, and side view of FIGS. 3B to 3D, the substantially U-shaped fixing portion 7 is detachably fixed to the sheave side surface 2a by the magnet portions 7a embedded in two bottom surfaces thereof. Can do. Further, the notch portion 7c is provided with a rod-like positioning portion 7b, and by bringing the downward swing yarn 5 into contact with the positioning portion 7b, the downward swing yarn 5 is placed on the side surface of the sheave as shown in the perspective view of FIG. 3A. It can be positioned at a certain distance (for example, 5 mm) from 2a. In the present embodiment, the positioning portion 7b is formed in a rod shape, thereby reducing the contact area between the lowering yarn 5 and the positioning portion 7b and reducing the frictional resistance generated on the contact surface between them, but the notch portion 7c itself If the shape is lowered so that the contact area with the pendulum thread 5 is reduced, the fixing portion 7 may be omitted from the positioning portion 7b.

次に、図4を用いてスケール台8を詳細に説明する。図4Aに示すように、スケール台8は、取付け板8aとスケール部8bが、取付け板8aの連結具81bを介して連結されたものである。なお、本実施例では連結具81bを磁石として磁性金属性のスケール部8bを取り付けている。また、図4B〜Dの平面図、側面図、背面図に示すように、略L字状の取付け板8aは基部に埋設された磁石部81aによって、シーブ側面2aに着脱可能に固定することができる。さらに、図4Aに示すように、スケール部8bには目盛り部82bが設けられており、これを用いてシーブ側面2aと下げ振り糸5の距離を測定することができる。なお、図示しないが、目盛り部82bはスケール部8bの両面に設けられており、表裏何れの方向からも目盛りを読むことができる。   Next, the scale table 8 will be described in detail with reference to FIG. As shown in FIG. 4A, the scale base 8 is obtained by connecting an attachment plate 8a and a scale portion 8b via a connection tool 81b of the attachment plate 8a. In the present embodiment, the magnetic metallic scale portion 8b is attached using the coupler 81b as a magnet. 4B to 4D, the substantially L-shaped mounting plate 8a can be detachably fixed to the sheave side surface 2a by a magnet portion 81a embedded in the base portion. it can. Further, as shown in FIG. 4A, the scale portion 8 b is provided with a scale portion 82 b, and the distance between the sheave side surface 2 a and the downward swing yarn 5 can be measured using this. Although not shown, the scale portion 82b is provided on both sides of the scale portion 8b, and the scale can be read from either the front or back direction.

次に、図5を用いて位置調整部9を詳細に説明する。図5Aに示すように、位置調整部9は、位置調整駒部9a、ベース板9d、取付け板9fの三者からなる。また、図5B〜Eの斜視図、正面図、背面図に示すように、位置調整部9は、略T字状の取付け板9fの3ヶ所に埋設された磁石部9cによって反らせ車側面3aに着脱可能に固定することができる。なお、図5Bでは、右側のナット92bに位置調整駒部9aを取り付けたが、反らせ車3の形状、位置調整部9の取付位置によっては、左側のナット92bに位置調整駒部9aを取り付けても良い。   Next, the position adjustment unit 9 will be described in detail with reference to FIG. As shown in FIG. 5A, the position adjusting unit 9 includes three members: a position adjusting piece 9a, a base plate 9d, and a mounting plate 9f. Moreover, as shown in the perspective views, front views, and rear views of FIGS. It can be fixed detachably. In FIG. 5B, the position adjustment piece 9a is attached to the right nut 92b, but the position adjustment piece 9a is attached to the left nut 92b depending on the shape of the curling wheel 3 and the attachment position of the position adjustment part 9. Also good.

さらに、図5Aに示すように、位置調整駒部9aには、下げ振り糸5が係合する複数の溝部91aと、ナット92bと螺合する軸92aが設けられている。そして、この軸92aを回転させることで、位置調整駒部9aの突出量を調整できる。このような構成によって、シーブ2と反らせ車3の平行度の許容範囲内において、位置調整駒部9aの突出量を自由に設定することができる。   Further, as shown in FIG. 5A, the position adjusting piece 9a is provided with a plurality of grooves 91a with which the swinging yarn 5 is engaged, and a shaft 92a with which the nut 92b is screwed. And the protrusion amount of the position adjustment piece part 9a can be adjusted by rotating this axis | shaft 92a. With such a configuration, the protruding amount of the position adjusting piece 9a can be freely set within the allowable range of parallelism between the sheave 2 and the curving wheel 3.

これらの固定部7、スケール台8、位置調整部9からなる芯出し装置を用いた、エレベータ巻上機のシーブ2と反らせ車3を平行に配置するまでの芯出し手順を、図6を用いて説明する。   The centering procedure until the sheave 2 of the elevator hoisting machine and the curving wheel 3 are arranged in parallel using the centering device including the fixing unit 7, the scale base 8, and the position adjusting unit 9 will be described with reference to FIG. I will explain.

まず、シーブ側面2aの上部に下げ振り本体4を磁力吸着固定する(図6(a))。その後、下げ振り本体4から引き出した下げ振り糸5を、それを跨ぐように取り付けた固定部7の位置決め部7bで押さえ、シーブ側面2aから一定の距離(例えば5mm)に位置決め保持する(図6(b))。   First, the swing main body 4 is fixed to the upper part of the sheave side surface 2a by magnetic force adsorption (FIG. 6A). Thereafter, the lowering yarn 5 pulled out from the lowering main body 4 is pressed by the positioning portion 7b of the fixing portion 7 attached so as to straddle it, and is positioned and held at a certain distance (for example, 5 mm) from the sheave side surface 2a (FIG. 6). (B)).

次に、反らせ車側面3aのシーブ2反対側縁部に位置調整部9を磁力吸着固定する。その後、下げ振り糸5をさらに引き出して、位置調整部9の溝部91aに係合させるとともに、その先端に錘6を取り付け、下げ振り糸5に張力を与える(図6(c))。そして、シーブ側面2aの反らせ車3側縁部にスケール台8を磁力吸着固定する(図6(d))。なお、図から明らかなように、この時点では、シーブ側面2aと下げ振り糸5は平行ではない。   Next, the position adjusting portion 9 is magnetically attracted and fixed to the edge portion on the opposite side of the sheave 2 of the curled wheel side surface 3a. Thereafter, the downward swing yarn 5 is further pulled out and engaged with the groove portion 91a of the position adjusting portion 9, and a weight 6 is attached to the tip thereof to apply tension to the downward swing yarn 5 (FIG. 6 (c)). Then, the scale base 8 is magnetically attracted and fixed to the edge portion of the sheave side face 2a on the curving wheel 3 side (FIG. 6D). As is apparent from the drawing, at this time, the sheave side face 2a and the lowering yarn 5 are not parallel.

その後、位置調整駒部9aの突出量を調整することで、下げ振り糸5と反らせ車側面3aとの距離を調整し、スケール台8の位置で下げ振り糸5がシーブ側面2aから一定距離(例えば5mm)となるようにする。すなわち、シーブ側面2aと下げ振り糸5の距離が、固定部7とスケール台8の2ヶ所で一定の距離となり、下げ振り糸5は、シーブ側面2aに平行に張設される位置関係となり、下げ振り糸5をエレベータ巻上機の芯出し作業の基準にすることができる(図6(e))。   Thereafter, by adjusting the amount of protrusion of the position adjusting piece 9a, the distance between the downward swing yarn 5 and the curled side surface 3a is adjusted, and the downward swing yarn 5 is located at a certain distance from the sheave side surface 2a at the position of the scale base 8. For example, 5 mm). That is, the distance between the sheave side surface 2a and the lowering pendulum thread 5 is a constant distance between the fixed portion 7 and the scale base 8, and the lowering pendulum thread 5 is in a positional relationship of being stretched in parallel with the sheave side surface 2a. The lower swing yarn 5 can be used as a reference for the centering work of the elevator hoist (FIG. 6E).

最後に、反らせ車側面3aと下げ振り糸5(芯出し作業の基準)との距離を少なくとも2箇所で測定し、これらが正規値となるように反らせ車3を調整することで、下げ振り糸5と反らせ車3を平行にすることができる。これにより、シーブ側面2aと反らせ車側面3aを平行にできたことになるため、芯出し調整不要として作業は完了する(図6(f))。   Finally, the distance between the side surface 3a of the curving wheel and the lowering yarn 5 (reference for the centering operation) is measured at at least two points, and the warping wheel 3 is adjusted so that these become the normal values, whereby the lowering yarn 5 and the car 3 can be made parallel. As a result, the sheave side face 2a and the curled side face 3a can be made parallel to each other, so that the centering adjustment is unnecessary and the operation is completed (FIG. 6F).

以上で説明したように、本実施例では、エレベータ巻上機の芯出し装置を、下げ振り本体4と、固定部7、位置調整部9といった軽量コンパクトな構成で、運搬性、保管性に優れた芯出し装置を用いて、芯出し調整作業を行うことができる。   As described above, in this embodiment, the centering device of the elevator hoisting machine has a lightweight and compact configuration such as the swing-down main body 4, the fixing portion 7, and the position adjusting portion 9, and is excellent in transportability and storage property. The centering adjustment operation can be performed using the centering device.

なお、上記実施例では、シーブ2と下げ振り糸5を平行にする際(図6(e)参照)に、スケール台8を用いたが、スケール台8を用いないことも可能である。この場合、上記実施例でスケール台8を設けた位置で手作業でシーブ2と下げ振り糸5の距離を測り、この距離が所定の距離(例えば5mm)となるように位置調整部9の突出量を調整すれば良い。   In the above-described embodiment, the scale table 8 is used when the sheave 2 and the lowering yarn 5 are made parallel (see FIG. 6E). However, the scale table 8 can be omitted. In this case, the distance between the sheave 2 and the pendulum thread 5 is measured manually at the position where the scale base 8 is provided in the above embodiment, and the position adjustment unit 9 protrudes so that this distance becomes a predetermined distance (for example, 5 mm). Adjust the amount.

1:主ロープ、2:シーブ、2a:シーブ側面、3:反らせ車、3a:反らせ車側面、4:下げ振り本体、5:下げ振り糸、6:錘、7:固定部、7a:磁石部、7b:位置決め部、7c:切欠き部、8:スケール台、8a:取付け板、81a:磁石部、8b:スケール部、81b:連結具、82b:目盛り部、9:位置調整部、9a:位置調整駒部、91a:溝部、92a:軸、92b:ナット、9c:磁石部、9d:ベース板、9f:取付け板 1: Main rope, 2: Sheave, 2a: Sheave side, 3: Warping wheel, 3a: Warping wheel side, 4: Lower swing body, 5: Lower swing thread, 6: Weight, 7: Fixed part, 7a: Magnet part 7b: positioning part, 7c: notch part, 8: scale base, 8a: mounting plate, 81a: magnet part, 8b: scale part, 81b: coupling tool, 82b: scale part, 9: position adjusting part, 9a: Position adjusting piece, 91a: groove, 92a: shaft, 92b: nut, 9c: magnet, 9d: base plate, 9f: mounting plate

Claims (3)

乗かごに連結された主ロープが巻き掛けられるシーブと、前記主ロープが巻き掛けられる反らせ車と、を有するエレベータ巻上機の芯出し装置であって、
前記シーブの側面に取り付けたときに下げ振り糸を押さえることで、前記シーブの側面と前記下げ振り糸を一定の距離に位置決めする棒状の位置決め部を切り欠き部に設けた略コ字状の固定部と、
前記反らせ車の側面に取り付けられ、前記下げ振り糸を係合した状態でその突出量を調整する位置調整部と、
前記下げ振り糸の端部に取り付けられ、該下げ振り糸に張力を付与する錘と、
を備えたことを特徴とするエレベータ巻上機の芯出し装置。
An elevator hoisting machine centering device having a sheave around which a main rope connected to a car is wound, and a curling wheel around which the main rope is wound,
Wherein the lowering to suppress the swing yarn when mounted to the side surface of the sheave, fixed substantially U-shaped provided at the cutout portion positioning portion of the rod-like positioning the plumb thread with the side surface of the sheave at a constant distance And
A position adjusting unit which is attached to a side surface of the warping wheel and adjusts a protruding amount in a state in which the lowering thread is engaged;
A weight attached to an end of the down swab, and applying tension to the down swab;
A centering device for an elevator hoisting machine.
請求項1に記載のエレベータ巻上機の芯出し装置において、さらに、
前記シーブの側面に取り付けられ、前記下げ振り糸を供給する下げ振り本体と、
前記シーブの側面に取り付けられ、前記シーブの側面と前記下げ振り糸の距離を測定するスケール台と、
を備えたことを特徴とするエレベータ巻上機の芯出し装置。
The centering device for an elevator hoist according to claim 1, further comprising:
A swing-down body attached to a side surface of the sheave and supplying the swing-down thread;
A scale base attached to a side surface of the sheave and measuring a distance between the side surface of the sheave and the swoop yarn;
A centering device for an elevator hoisting machine.
請求項2に記載のエレベータ巻上機の芯出し装置において、
前記固定部、前記スケール台、前記位置調整部は、各々に設けられた磁石部によって、前記シーブまたは前記反らせ車に磁力吸着固定されることを特徴とするエレベータ巻上機の芯出し装置。
The centering device for an elevator hoist according to claim 2,
The centering device for an elevator hoisting machine, wherein the fixing unit, the scale base, and the position adjusting unit are magnetically attracted and fixed to the sheave or the curling wheel by a magnet unit provided respectively.
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