JP2019124525A - Speed reduction mechanism and liquid level display device - Google Patents

Speed reduction mechanism and liquid level display device Download PDF

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JP2019124525A
JP2019124525A JP2018004263A JP2018004263A JP2019124525A JP 2019124525 A JP2019124525 A JP 2019124525A JP 2018004263 A JP2018004263 A JP 2018004263A JP 2018004263 A JP2018004263 A JP 2018004263A JP 2019124525 A JP2019124525 A JP 2019124525A
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wire member
fixed
movable
drum
reduction mechanism
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JP6993884B2 (en
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塩田 広
Hiroshi Shioda
広 塩田
加島 規安
Noriyasu Kashima
規安 加島
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Toshiba Industrial Products and Systems Corp
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Abstract

To provide a speed reduction mechanism that responds to various speed reduction ratios while being constructed in a compact size by a relatively simple structure.SOLUTION: A speed reduction mechanism 14 comprises: a fixed-side pulley group 19 in which a drum 18 for wire guide is arranged coaxially around a revolving shaft rotatably supported to a base, and which includes a fixed support shaft located on the outer circumferential side of the drum and fixedly provided on the base and a plurality of fixed pulleys rotatably fitted to the fixed support shaft; a movable-side pulley group 20 including a movable support shaft provided swingably around the revolving shaft coupled via a coupling part extending in the radial direction from the revolving shaft and a plurality of moving pulleys rotatably fitted to the movable support shaft; and a wire member 7, one end of which is fixed to a fixing region or the movable-side pulley group and the other end is pulled out or drawn in from the outside. The wire member is alternately put to the fixed and the moving pulleys while being guided to the outer circumference of the drum. The movement of the wire member is slowed down by pulling out or drawing in the wire member from the outside and is converted to the rotation of the revolving shaft.SELECTED DRAWING: Figure 8

Description

本発明の実施形態は、減速機構及び液面表示装置に関する。   Embodiments of the present invention relate to a speed reduction mechanism and a liquid level display device.

例えば油入変圧器においては、収納容器(液槽)内に、変圧器本体を、絶縁油や液体シリコーン等の冷却液と共に収納して構成されるものが知られている。このような油入変圧器は、設置時(最初の注液時)や保守の際に、冷却液を貯留する液槽の外部から冷却液の残存量を確認できることが必要である。そこで、外部から油面の高さレベルを確認することができる油面計として、特許文献1に記載されたダイヤル油面計が知られている。このダイヤル油面計は、油面に応じて上下動(円弧状に移動)するフロートを、L字状のシャフトの基端側の取付け、シャフトの他端側の回転によって、指示針を回転させて油面レベルを表示するように構成されている。   For example, among oil-filled transformers, there is known one configured to store a transformer body in a storage container (liquid tank) together with a coolant such as insulating oil and liquid silicone. Such an oil-filled transformer is required to be able to confirm the remaining amount of cooling fluid from the outside of the fluid tank storing the cooling fluid at the time of installation (at the time of first pouring) and at the time of maintenance. Then, the dial oil level meter described in patent document 1 is known as an oil level meter which can confirm the height level of an oil level from the exterior. This dial oil level meter rotates the pointer by mounting a float that moves up and down (moves in an arc) according to the oil level on the base end side of the L-shaped shaft, and by rotating the other end side of the shaft. Oil level is displayed.

実開昭63−19225号公報Japanese Utility Model Publication No. 63-19225

上記のような油入変圧器には、様々な種類(大きさ)のものが供されているが、大型で油面の上下の変動幅が大きいものでは、上記したダイヤル油面計では、フロートの移動範囲が大きくなり、全体的に大型、大がかりになってしまう。そこで、フロートを単純に上下動させるように設けると共に、フロートにロープ等の紐部材を取付けて、フロートの上下移動に伴う紐部材の移動を、針の回転移動に変換するように構成した液面表示装置が考えらえる。この場合、紐部材の移動を針の回転移動に変換する機構、つまり減速機構を、比較的簡単な構成で、コンパクトに済ませることが望まれるのである。   Various types (sizes) of oil-impregnated transformers such as those described above are provided. However, in the case of a large oil-sliding machine with a large fluctuation range in the oil level, the above-mentioned dial oil level meter is a float. The movement range of the will be large, and the whole will be large and large. Therefore, the float is provided to simply move the float up and down, and a string member such as a rope is attached to the float, and the liquid surface configured to convert the movement of the string member accompanying the vertical movement of the float into the rotational movement of the needle A display device can be considered. In this case, it is desirable to make the mechanism for converting the movement of the string member into the rotational movement of the needle, that is, the speed reducing mechanism compact with a relatively simple configuration.

尚、上記したように、この種の油入変圧器には様々な規格のものがあり、液槽の大きさに応じて、冷却液の収容量ひいては液面の上下の変位幅が大きく相違してくる。例えば小型のものでは、液面が、50mm程度の幅で上下するものがあり、大型のものでは、液面が500mmの幅で上下するものもある。そのため、液面の上下の変位幅が相違してくるような複数種類の液冷式電気機器に関して、共用可能となる液面表示装置を提供する、即ち様々な減速比に対応することが可能な減速装置を提供することができれば、大変有用となる。   As described above, there are various standards for this type of oil-filled transformer, and depending on the size of the liquid tank, the capacity of the coolant, and hence the displacement width above and below the liquid surface, differ greatly. Come. For example, in some small ones, the liquid level goes up and down with a width of about 50 mm, and in the large ones, some go up and down with a width of 500 mm. Therefore, it is possible to provide a liquid level display device that can be shared, that is, to cope with various reduction ratios, with respect to a plurality of types of liquid-cooled electrical devices in which the displacement width of the liquid level differs vertically. It would be very useful if a reduction gear could be provided.

そこで、比較的簡単な構成でコンパクトに済ませることができながら、様々な減速比に対応することが可能な減速機構、及びその減速機構を備えた液面表示装置を提供する。   Therefore, a reduction mechanism capable of coping with various reduction ratios while being compact with a relatively simple configuration, and a liquid level display device provided with the reduction mechanism are provided.

実施形態に係る減速機構は、ベースに回転可能に支持された回転軸と、前記回転軸の周りに同軸に配置されたワイヤガイド用のドラムと、前記ベースに前記ドラムの外周側に位置し前記回転軸と平行に延びて固定的に設けられた固定支持軸とその固定支持軸に軸方向に重なるように夫々回転自在に嵌挿された複数の定滑車とを備える固定側滑車群と、前記回転軸から放射方向に延びる連結部を介して連結され前記ドラムの外周側を該回転軸と平行に延び前記回転軸を中心に旋回可能に設けられた可動支持軸とその可動支持軸に軸方向に重なるように夫々回転自在に嵌挿された複数の動滑車とを備える可動側滑車群と、前記ベースに対する固定部位又は前記可動側滑車群に一端側が固定され他端側が外部に配置されて外側から引き出し又は繰り入れされるワイヤ部材とを備えている。そして、前記ワイヤ部材は、前記ドラムの外周にガイドされながら、前記定滑車と動滑車とに交互に掛けられ、該ワイヤ部材の外側からの引き出し又は繰り入れにより、該ワイヤ部材の移動を減速して前記回転軸の回転に変換するように構成されている。   The speed reduction mechanism according to the embodiment includes a rotating shaft rotatably supported by a base, a drum for a wire guide coaxially disposed around the rotating shaft, and the drum located on an outer peripheral side of the drum. A stationary pulley group comprising: a fixed support shaft extending in parallel with the rotation axis and a plurality of fixed pulleys rotatably inserted so as to axially overlap the fixed support shaft; A movable support shaft which is connected via a connecting portion extending in a radial direction from a rotation shaft and extends parallel to the rotation shaft and extends parallel to the rotation shaft, and a movable support shaft pivotable about the rotation shaft A movable side pulley group including a plurality of moving pulleys rotatably inserted so as to overlap each other, a fixed portion to the base or the movable side pulley group fixed at one end side and the other end side is disposed outside Pull out from And a wire member is. The wire member is alternately hooked to the fixed pulley and the moving pulley while being guided to the outer periphery of the drum, and the movement of the wire member is decelerated by pulling out or feeding the wire member from the outside. It is comprised so that it may convert into rotation of the said rotating shaft.

実施形態に係る液面表示装置は、液体が貯留された液槽内に配置され前記液体の液面の変動に連動して上下方向に移動する移動部材と、前記液体の液面の高さ位置を表示する表示器とを備える。前記表示器は、前記液面の高さ位置に対応した目盛を円弧状に配置してなる目盛板と、回転移動により先端が前記目盛板の目盛を指し示す表示針と、請求項1から7のいずれか一項に記載の減速機構とを備える。そして、前記減速機構の前記ワイヤ部材の他端側に前記移動部材が接続されると共に、前記減速機構の前記回転軸に前記表示針が連結されて回転移動されるように構成されている。   The liquid level display device according to the embodiment includes a moving member which is disposed in a liquid tank in which liquid is stored and moves in the vertical direction in conjunction with fluctuation of the liquid level of the liquid, and the height position of the liquid level of the liquid And an indicator for displaying the The indicator according to any one of claims 1 to 7, wherein the indicator has a scale plate in which a scale corresponding to the height position of the liquid surface is arranged in an arc, a display needle whose tip moves to the scale of the scale by rotational movement. And the reduction mechanism according to any one of the above. The moving member is connected to the other end of the wire member of the speed reduction mechanism, and the display needle is connected to the rotation shaft of the speed reduction mechanism so as to be rotationally moved.

一実施形態を示すもので、油入絶縁変圧器の全体構成を概略的に示す一部縦断正面図1, showing an embodiment, is a partial vertical front view schematically showing an overall configuration of an oil-filled insulation transformer. 油入絶縁変圧器の液槽内に配置される移動部材部分の構成を示す拡大縦断正面図An enlarged longitudinal front view showing the configuration of the moving member portion disposed in the liquid tank of the oil-filled insulation transformer 液面表示装置の表示器の外観構成を概略的に示す図A diagram schematically showing an appearance configuration of a display of a liquid level display device 液面表示装置の内部に設けられる減速機構の構成を概略的に示す斜視図The perspective view which shows roughly the structure of the deceleration mechanism provided in the inside of a liquid level display apparatus 減速機構における回転軸と可動側滑車群との位置関係を示すもので、(a)は0°の場合、(b)は45°の場合、(c)は270°の場合の平面図The positional relationship between the rotation shaft and the movable pulley group in the reduction mechanism is shown. (A) is 0 °, (b) is 45 °, (c) is a plan view in 270 ° 減速比が1:10の場合のワイヤ部材の掛け方を示す減速機構の平面図Top view of the reduction mechanism showing how to hang the wire member when the reduction ratio is 1:10 減速比が1:10の場合のワイヤ部材の掛け方を示す減速機構の左側面図(a)及び正面図(b)A left side view (a) and a front view (b) of the speed reduction mechanism showing how to hang the wire member when the speed reduction ratio is 1:10 減速比が1:1の場合のワイヤ部材の掛け方を示す減速機構の平面図Top view of the reduction mechanism showing how to lay the wire member when the reduction ratio is 1: 1 減速比が1:1の場合のワイヤ部材の掛け方を示す減速機構の左側面図(a)及び正面図(b)A left side view (a) and a front view (b) of the reduction mechanism showing how the wire member is hooked when the reduction ratio is 1: 1 減速比が1:2の場合のワイヤ部材の掛け方を示す減速機構の平面図Top view of the reduction mechanism showing how to hang the wire member when the reduction ratio is 1: 2 減速比が1:2の場合のワイヤ部材の掛け方を示す減速機構の左側面図(a)及び正面図(b)A left side view (a) and a front view (b) of the speed reduction mechanism showing how the wire member is hooked when the speed reduction ratio is 1: 2 減速比が1:3の場合のワイヤ部材の掛け方を示す減速機構の平面図Top view of the reduction mechanism showing how to hang the wire member when the reduction ratio is 1: 3 減速比が1:3の場合のワイヤ部材の掛け方を示す減速機構の左側面図(a)及び正面図(b)A left side view (a) and a front view (b) of the speed reduction mechanism showing how to hang the wire member when the speed reduction ratio is 1: 3 減速比が1:4の場合のワイヤ部材の掛け方を示す減速機構の左側面図(a)及び正面図(b)A left side view (a) and a front view (b) of the speed reduction mechanism showing how the wire member is hung when the speed reduction ratio is 1: 4

以下、油入絶縁変圧器の液面表示装置に適用した一実施形態について、図面を参照しながら説明する。図1は、液冷式電気機器としての油入絶縁変圧器1の全体構成を概略的に示している。この油入絶縁変圧器1は、例えば金属製の液槽2内に、機器本体としての変圧器本体(図示せず)を収納して構成される。前記液槽2は、図1でやや横長な矩形箱状に構成され、密閉されるようになっている。この液槽2は、接地電位とされる。図示はしないが、前記変圧器本体は、鉄心に、例えば3個のモールドコイルを装着してなる周知構成を備えている。   Hereinafter, an embodiment applied to a liquid level display device of an oil-filled insulation transformer will be described with reference to the drawings. FIG. 1 schematically shows the overall configuration of an oil-filled insulation transformer 1 as a liquid-cooled electrical device. The oil-filled insulation transformer 1 is configured, for example, by housing a transformer main body (not shown) as a device main body in a liquid tank 2 made of metal. The liquid tank 2 is configured in a rectangular box shape slightly longer in FIG. 1 and is sealed. The liquid tank 2 is at ground potential. Although not shown, the transformer body has a known configuration in which, for example, three molded coils are mounted on an iron core.

前記液槽2内には、前記変圧器本体全体が浸されるように、冷却液(液体)としての絶縁油3が、天井部近くまで充填されている。絶縁油3としては、例えば鉱油が採用されている。図1、図2には、絶縁油3の油面である液面の高さ位置を符号Sで示している。これにより、前記変圧器本体のコイルの外周部や、接続用のケーブル部分等は、高電圧となる充電部とされるが、それら充電部全体が絶縁油3により浸されて絶縁及び冷却が図られている。   In the liquid tank 2, an insulating oil 3 as a cooling liquid (liquid) is filled up near the ceiling so that the entire transformer body is immersed. For example, mineral oil is employed as the insulating oil 3. In FIG. 1 and FIG. 2, the height position of the liquid level which is the oil level of the insulating oil 3 is indicated by the symbol S. As a result, although the outer peripheral part of the coil of the transformer main body, the cable part for connection, etc. are used as a high voltage charging part, the entire charging part is immersed in the insulating oil 3 and the insulation and cooling are shown. It is done.

このとき、変圧器の稼働中に、絶縁油3の液面Sは、温度による膨張、収縮に伴っても上下に変動する。絶縁油3は、液槽2内において、その液面Sが、変圧器本体の絶縁及び冷却に必要な最低液位(L)以上であって、液槽2の天井部との間に僅かな隙間を確保する最高液位(H)以下になるように貯留される。そのような液槽2内の絶縁油3の液面Sの変動幅をDとする。この変動幅Dは、油入変圧器1の規格、ひいては液槽2の大きさに応じて相違し、例えば小型のものでは、変動幅Dが50mm程度となり、大型のものでは、変動幅Dが500mm程度のものもある。   At this time, while the transformer is in operation, the liquid level S of the insulating oil 3 fluctuates up and down along with expansion and contraction due to temperature. In the liquid tank 2, the liquid level S of the insulating oil 3 is equal to or higher than the lowest liquid level (L) necessary for insulation and cooling of the transformer main body, and a slight distance between the liquid level S and the ceiling of the liquid tank 2 It is stored so as to be below the highest liquid level (H) to secure the gap. The fluctuation range of the liquid level S of the insulating oil 3 in the liquid tank 2 is D. The fluctuation range D differs depending on the specification of the oil-filled transformer 1 and hence the size of the liquid tank 2. For example, the fluctuation range D is about 50 mm in a small size, and the fluctuation range D is large in a large size. Some are about 500 mm.

そして、本実施形態の油入絶縁変圧器1にあっては、液槽2内の絶縁油3の液面Sの高さ位置を、外部から作業者が知る(視認する)ための液面表示装置4が設けられる。図1から図3に示すように、本実施形態に係る液面表示装置4は、前記絶縁油3の液面Sの変動に連動して上下方向に移動する移動部材としての浮き子5、絶縁油3の液面Sの高さ位置を表示する表示器6、一端が前記浮き子5に接続されたワイヤ部材7を備えて構成される。   And, in the oil filled insulation transformer 1 of the present embodiment, the liquid level display for the operator to know from the outside (visualize) the height position of the liquid level S of the insulating oil 3 in the liquid tank 2 A device 4 is provided. As shown in FIG. 1 to FIG. 3, the liquid level display device 4 according to the present embodiment is a float 5 as a moving member that moves up and down in conjunction with the fluctuation of the liquid level S of the insulating oil 3. A display 6 for displaying the height position of the liquid surface S of the oil 3 and a wire member 7 having one end connected to the float 5 are provided.

そのうち浮き子5は、図1、図2に示すように、例えばプラスチックから中空状に構成された偏平な円筒状をなし、前記絶縁油3の液面Sに浮かぶ、つまり液面Sの上下動に連動して上下動するように配置されている。図2に示すように、前記ワイヤ部材7は、例えば金属製のワイヤからなり、その一端が前記浮き子5の上面中央部に接続されている。このワイヤ部材7は、柔軟に屈曲可能に構成され、液槽2の上面に形成された円形開口部8を通って外部に導出される。   Among them, as shown in FIGS. 1 and 2, the float 5 has a flat cylindrical shape, for example, made of plastic and is hollow and floats on the liquid surface S of the insulating oil 3, that is, the vertical movement of the liquid surface S. It is arranged to move up and down in conjunction with the. As shown in FIG. 2, the wire member 7 is made of, for example, a metal wire, and one end of the wire member 7 is connected to the central portion of the upper surface of the float 5. The wire member 7 is configured to be flexibly bendable, and is drawn out through a circular opening 8 formed on the upper surface of the liquid tank 2.

また、前記浮き子5の上面外周部と前記円形開口部8との間には、ゴムや軟質プラスチックからなる円筒蛇腹状の伸縮部材9が、それらを上下につなぐようにして、上下方向に伸縮可能に構成されている。これにより、ワイヤ部材7は、伸縮部材9内を通って外部に導出され、伸縮部材9の内部に絶縁油3の蒸気などが浸入することが防止される。前記表示器6は、図1に示すように、前記液槽2の外面この場合前面の、作業者にとって見やすい高さ位置に取付けられている。このとき、前記円形開口部8と表示器6のケース10との間をつなぐように、接続管11が設けられ、円形開口部8から導出されたワイヤ部材7は、接続管11内を通って表示器6のケース10内に導入される。   In addition, a cylindrical bellows-like expansion and contraction member 9 made of rubber or soft plastic is vertically extended and contracted between the upper surface outer peripheral portion of the float 5 and the circular opening 8 so as to connect them vertically. It is configured to be possible. Thereby, the wire member 7 is led to the outside through the inside of the expansion and contraction member 9, and the vapor of the insulating oil 3 and the like is prevented from entering the inside of the expansion and contraction member 9. As shown in FIG. 1, the display 6 is attached to the outer surface, in this case, the front surface of the liquid tank 2, at a height position easy for the operator to see. At this time, a connecting pipe 11 is provided so as to connect between the circular opening 8 and the case 10 of the display 6, and the wire member 7 derived from the circular opening 8 passes through the connecting pipe 11. It is introduced into the case 10 of the display 6.

ここで、前記表示器6について詳述する。この表示器6は、図1、図3等に一部示すように、ワイヤ部材7の他端側が導入されるケース10と、該ケース10の前面部に設けられた目盛板12及び表示針13と、該ケース10内に設けられ前記表示針13を動作させるための針駆動機構としての減速機構14(図4等参照)とを備えて構成される。前記ケース10は、円筒状に構成され、その前面には、ガラス等の透明板が配置され、目盛板12及び表示針13が目視できるようになっている。   Here, the display 6 will be described in detail. As shown in part in FIG. 1 and FIG. 3 etc., this display 6 has a case 10 into which the other end of the wire member 7 is introduced, a scale plate 12 provided on the front surface of the case 10 and display hands 13. And a decelerating mechanism 14 (see FIG. 4 etc.) as a needle driving mechanism provided in the case 10 and operating the display needle 13. The case 10 is formed in a cylindrical shape, and a transparent plate such as glass is disposed on the front surface of the case 10 so that the scale plate 12 and the display needle 13 can be viewed visually.

図3に示すように、前記目盛板12は、円形状をなし、その外周側寄り部位に、液面Sの高さレベルを示す目盛が円弧状に並んで設けられている。この場合、目盛板12は、図で左下部に位置して、最低液位を示す「LOW(0)」の目盛が記されると共に、図で右下部に位置して、最高液位を示す「HIGH(100)」の目盛が記される。そして、「LOW(最低液位)」を0%、「HIGH(最高液位)」を100%として、それらの間が、時計回り方向に順に大きくなるように、液面Sの高さの割合を示す数字である、「10」〜「90」の目盛が均等に記されている。   As shown in FIG. 3, the scale plate 12 has a circular shape, and a scale indicating the height level of the liquid surface S is provided in a circular arc at a portion near the outer peripheral side. In this case, the scale plate 12 is positioned at the lower left in the figure and has a scale of "LOW (0)" indicating the lowest liquid level, and is positioned at the lower right in the figure to indicate the highest liquid level. A scale of "HIGH (100)" is drawn. Then, assuming that “LOW (minimum liquid level)” is 0% and “HIGH (highest liquid level)” is 100%, the ratio of the height of the liquid level S so that the interval between them becomes sequentially larger in the clockwise direction. The scale of "10"-"90" which is a number which shows () is equally described.

前記表示針13は、先端が目盛板12のいずれかの目盛を指し示す針状をなし、その基端部が、目盛板12の中心を貫通する軸部15の先端に取付けられ、半径方向に延びている。この場合、表示針13(軸部15)は、「LOW(0)」の目盛から、「HIGH(100)」の目盛までの、例えば角度270度の範囲で回転可能に構成されている。ここでは、表示針13が、「LOW(0)」の目盛を指し示す軸部15(後述する回転軸)の位置を0°とし、表示針13が、「HIGH(100)」の目盛を指し示す軸部15(回転軸)の位置を270°とする。   The indicator needle 13 has a needle shape whose tip points to any of the graduations of the scale plate 12, and the base end thereof is attached to the tip of the shaft portion 15 penetrating the center of the scale plate 12 and extends in the radial direction ing. In this case, the display needle 13 (shaft portion 15) is configured to be rotatable, for example, within an angle of 270 degrees from the scale of “LOW (0)” to the scale of “HIGH (100)”. Here, the display needle 13 sets the position of the shaft portion 15 (rotational axis to be described later) to point to the scale of “LOW (0)” at 0 °, and the display needle 13 points to the scale of “HIGH (100)” The position of the part 15 (rotation axis) is 270 °.

さて、本実施形態に係る減速機構14について、図4〜図14を参照して述べる。尚、図4〜図14では、減速機構14即ち表示器6の内部構成を、表示器6の表面側つまり目盛板12のある側を上方に向けて示している。以下の減速機構14の説明で、上下方向を言う場合には、この上下の向きを基準とすることとする。従って、図5、図6等が上方から見た平面図となる。   Now, the speed reducing mechanism 14 according to the present embodiment will be described with reference to FIGS. 4 to 14, the internal structure of the speed reduction mechanism 14 or the display 6 is shown with the front side of the display 6, that is, the side with the scale plate 12 directed upward. When the vertical direction is referred to in the following description of the reduction mechanism 14, the vertical direction is used as a reference. Therefore, FIG. 5, FIG. 6, etc. become the top view seen from the upper side.

図4〜図14に示すように、前記減速機構14は、ベース16、回転軸17、ワイヤガイド用のドラム18、固定側滑車群19、可動側滑車群20、付勢手段としてのぜんまいばね21(図7等参照)を備える。これと共に、表示器6のケース10内に導入されたワイヤ部材7の他端側部分が、減速機構14に接続されるようになっている。前記ベース16は、円板状(薄型円筒状)をなし、表示器6のケース10内に固定的に設けられている。前記回転軸17は、前記ベース16の中心部から図で上方に延びるように回転自在に支持されている。回転軸17の上端に、前記軸部15が上方に突出するように設けられ、その軸部15に前記表示針13が取付けられている。   As shown in FIGS. 4 to 14, the speed reducing mechanism 14 includes a base 16, a rotating shaft 17, a wire guide drum 18, a fixed pulley group 19, a movable pulley group 20, and a mainspring spring 21 as biasing means. (Refer to FIG. 7 etc.) At the same time, the other end portion of the wire member 7 introduced into the case 10 of the display 6 is connected to the speed reduction mechanism 14. The base 16 has a disk shape (thin cylindrical shape) and is fixedly provided in the case 10 of the display 6. The rotation shaft 17 is rotatably supported so as to extend upward in the figure from a central portion of the base 16. The shaft portion 15 is provided on the upper end of the rotating shaft 17 so as to protrude upward, and the display needle 13 is attached to the shaft portion 15.

前記ドラム18は、図5にも示すように、中心に前記回転軸17が挿通される中心穴を有する円筒状をなし、回転軸17の外周部に同軸に設けられている。この場合、図7等に示すように、ドラム18は、後に述べる連結部22が通過可能な空間を下部、つまりベース16上に確保した状態で、前記ベース16に対して固定的に設けられている。尚、このドラム18の外径寸法は、後述する動滑車及び定滑車の外径寸法よりもやや大きく(2倍程度に)構成されている。   As shown in FIG. 5, the drum 18 has a cylindrical shape having a central hole through which the rotary shaft 17 is inserted at the center, and is coaxially provided on the outer peripheral portion of the rotary shaft 17. In this case, as shown in FIG. 7 and the like, the drum 18 is fixedly provided to the base 16 in a state where a space through which the connection portion 22 described later can pass is secured on the lower portion, that is, the base 16 There is. The outer diameter of the drum 18 is slightly larger (about twice) than the outer diameters of a moving pulley and a fixed pulley described later.

また、本実施形態では、図6〜図14にも示すように、ドラム18の外周面には、ワイヤ部材7をガイドするための複数本のガイド溝23が円周方向に全周に延びて形成されている。このとき、ガイド溝23は、軸方向に等間隔に並んで形成されており、後述する動滑車(及び定滑車)の個数(5本)の倍となる本数、この場合10本が形成されている。更に本実施形態では、ドラム18の外周面の少なくともガイド溝23の内面は、摩擦係数を小さくするための例えばテフロン加工等の表面処理が施され、ワイヤ部材7が滑りやすい状態に構成されている。   Further, in the present embodiment, as also shown in FIGS. 6 to 14, a plurality of guide grooves 23 for guiding the wire member 7 extend all around in the circumferential direction on the outer peripheral surface of the drum 18. It is formed. At this time, the guide grooves 23 are formed at equal intervals in the axial direction, and in this case, a number that is twice the number (five) of the number of moving pulleys (and fixed pulleys) described later There is. Furthermore, in the present embodiment, at least the inner surface of the guide groove 23 on the outer peripheral surface of the drum 18 is subjected to surface treatment such as Teflon processing to reduce the coefficient of friction, and the wire member 7 is configured to be slippery .

前記固定側滑車群19は、図4〜図14に示すように、前記ベース16上の前記ドラム18の前側に位置して設けられ、固定支持軸24と複数個の定滑車25とを備えて構成される。固定支持軸24は、ベース16から上方に延びて、つまり前記回転軸17と平行に延びて固定的に設けられている。定滑車25は、この固定支持軸24に、複数個例えば5個が軸方向に重なるように嵌挿され、固定支持軸24に対し、夫々が図示しない軸受を介して回転自在に取付けられている。   The fixed side pulley group 19 is provided on the front side of the drum 18 on the base 16 and includes a fixed support shaft 24 and a plurality of fixed pulleys 25 as shown in FIGS. Configured The fixed support shaft 24 extends upward from the base 16, that is, parallel to the rotation shaft 17 and fixedly provided. A plurality of, for example, five fixed pulleys 25 are inserted into the fixed support shaft 24 so as to overlap in the axial direction, and are rotatably attached to the fixed support shaft 24 via bearings (not shown). .

この場合、固定側滑車群19の各定滑車25は、図4〜図6等に示すように、前記ドラム18の外周面から若干離間して位置されている。また、図7等に示すように、上下に隣り合う定滑車25間は、少しだけ離間しており、1個の定滑車25が、前記ドラム18のガイド溝13の2本分の高さに位置されるように配置されている。更に、図6、図7等に示すように、前記固定支持軸24には、最下段の定滑車25のすぐ下部に位置して、ワイヤ部材7の端部を固定(接続)するための固定側取付部26が設けられている。   In this case, each fixed pulley 25 of the fixed-side pulley group 19 is positioned slightly apart from the outer peripheral surface of the drum 18, as shown in FIGS. Further, as shown in FIG. 7 and the like, the constant pulleys 25 adjacent to the upper and lower sides are slightly separated from each other, and one constant pulley 25 has a height corresponding to two guide grooves 13 of the drum 18. It is arranged to be positioned. Furthermore, as shown in FIG. 6, FIG. 7, etc., the fixed support shaft 24 is positioned immediately below the lowermost fixed pulley 25 and fixed for fixing (connecting) the end of the wire member 7 A side attachment 26 is provided.

前記可動側滑車群20は、前記回転軸17から放射方向に延びる連結部22を介して連結された可動支持軸27、及び、複数個この場合5個の動滑車28を備えている。前記連結部22は、図4、図5、図7(b)等に示すように、棒状をなし、基端部が前記回転軸17の下部に固定され、ベース16上を半径方向(図6等で左方)に延びている。前記可動支持軸27は、図4、図6等で前記ドラム18の左側に位置し、前記連結部22の先端から上方、即ち回転軸17と平行に延びるように一体に設けられている。これにて、可動支持軸27は、回転軸17の回転と一体的にドラム18の周囲を旋回移動するようになっている。   The movable side pulley group 20 includes a movable support shaft 27 connected via a connecting portion 22 extending in the radial direction from the rotation shaft 17 and a plurality of five moving pulleys 28 in this case. As shown in FIG. 4, FIG. 5, FIG. 7 (b), etc., the connecting portion 22 is in the shape of a rod, the base end portion thereof is fixed to the lower portion of the rotating shaft 17, It extends to the left with The movable support shaft 27 is located on the left side of the drum 18 in FIGS. 4 and 6, etc., and is integrally provided so as to extend upward from the tip of the connecting portion 22, that is, parallel to the rotation shaft 17. Thus, the movable support shaft 27 pivots around the drum 18 integrally with the rotation of the rotary shaft 17.

そして、前記動滑車28は、この可動支持軸27に、複数個例えば5個が軸方向に重なるように嵌挿され、可動支持軸27に対し、夫々が図示しない軸受を介して回転自在に取付けられている。この場合、可動側滑車群20の各動滑車28は、図4〜図6等に示すように、前記ドラム18の外周面から若干離間して位置されている。また、やはり図7等に示すように、上下に隣り合う動滑車28間は、少しだけ離間しており、1個の動滑車28が、前記ドラム18のガイド溝13の2本分の高さに位置されるように配置されている。このとき、動滑車28の方が前記定滑車25よりもやや低い位置に配置されている。更に、図8、図9等に示すように、前記動滑車28のうち最下段に位置する動滑車28には、ワイヤ部材7の端部を固定(接続)するための可動側取付部29が設けられている。   The moving pulley 28 is inserted into the movable support shaft 27 so that a plurality of, for example, five pieces are axially overlapped, and is rotatably mounted on the movable support shaft 27 via bearings (not shown). It is done. In this case, each moving pulley 28 of the movable pulley group 20 is positioned slightly apart from the outer peripheral surface of the drum 18, as shown in FIGS. Also, as shown in FIG. 7 and the like, the moving pulleys 28 vertically adjacent to each other are slightly separated from each other, and one moving pulley 28 has a height corresponding to two guide grooves 13 of the drum 18. It is arranged to be located at. At this time, the movable pulley 28 is disposed at a slightly lower position than the fixed pulley 25. Furthermore, as shown in FIG. 8 and FIG. 9 etc., the movable side attachment portion 29 for fixing (connecting) the end of the wire member 7 to the moving pulley 28 positioned at the lowermost stage of the moving pulley 28 is provided. It is provided.

ここで、図5の(a)、(b)、(c)は、回転軸17の0°の位置、45°の位置、270°の位置における、可動側滑車群20の位置を夫々示している。ここで、図5(a)に示すように、可動側滑車群20が前記固定側滑車群19の図ですぐ左側に来ている位置を、回転軸17の0°の位置と定義している。回転軸17及び可動側滑車群20が、そこから図で時計回り方向に一杯まで回動(旋回)して、図5(c)に示すように、可動側滑車群20が前記固定側滑車群19の図ですぐ右側に来た位置が、回転軸17の270°の位置とされる。図5(b)は、回転軸17の45°の位置を示しており、図4、図6〜図14は、減速機構14の構成を回転軸17が45°の位置にある状態で示している。   Here, (a), (b) and (c) in FIG. 5 show the position of the movable pulley group 20 at the 0 ° position, 45 ° position and 270 ° position of the rotating shaft 17, respectively. There is. Here, as shown in FIG. 5 (a), the position at which the movable pulley group 20 comes immediately to the left in the figure of the fixed pulley group 19 is defined as the 0 ° position of the rotary shaft 17. . The rotating shaft 17 and the movable pulley group 20 are then fully pivoted (clockwise) in the figure in the clockwise direction, and as shown in FIG. 5 (c), the movable pulley group 20 is the stationary pulley group. The position immediately to the right in FIG. 19 is the position of 270 ° of the rotating shaft 17. FIG. 5 (b) shows the 45 ° position of the rotating shaft 17, and FIGS. 4 and 6 to 14 show the configuration of the reduction gear mechanism 14 in a state where the rotating shaft 17 is at 45 ° There is.

また、詳しく図示はしないが、前記回転軸17ひいては可動側滑車群20は、付勢手段により0°方向、即ち図5等で反時計回り方向に付勢されているのであるが、本実施形態では、その付勢手段は、図7等に示すように、前記ベース16内に配置されたぜんまいばね21から構成されている。ちなみに、本実施形態では、回転軸17の位置が、0°から270°まで移動した際の、可動側滑車群20(厳密には可動側取付部29)の旋回方向の移動距離d(図5(a)参照)は、例えば50mmとされている。   Although not shown in detail, the rotation shaft 17 and thus the movable pulley group 20 are biased by the biasing means in the 0 ° direction, that is, in the counterclockwise direction in FIG. In that case, the biasing means is constituted by a mainspring spring 21 disposed in the base 16 as shown in FIG. 7 and the like. Incidentally, in this embodiment, the movement distance d of the movable pulley group 20 (strictly speaking, the movable attachment portion 29) in the turning direction when the position of the rotary shaft 17 moves from 0 ° to 270 ° (FIG. 5) The reference (a) is, for example, 50 mm.

そして、上記減速機構14にあっては、ケース10内に導入されたワイヤ部材7の他端側部分が、端部が可動側取付部29或いは固定側取付部26に取付けられた上で、前記ドラム18の外周にガイドされながら、前記固定側滑車群19の定滑車25と、可動側滑車群20の動滑車28とに交互に折返されながら掛けられるようにセットされる。これにて、ワイヤ部材7の外側からの引き出し又は繰り入れにより、該ワイヤ部材7の移動を減速して前記回転軸17の回転ひいては表示針13の回転移動に変換するように構成されている。   In the speed reduction mechanism 14, the other end portion of the wire member 7 introduced into the case 10 has the end attached to the movable attachment portion 29 or the fixed attachment portion 26, and While being guided by the outer periphery of the drum 18, the fixed pulley 25 of the fixed pulley group 19 and the moving pulley 28 of the movable pulley group 20 are set so as to be alternately folded and hung. Thus, the movement of the wire member 7 is decelerated to be converted into the rotation of the rotary shaft 17 and thus the rotational movement of the display needle 13 by pulling out or feeding the wire member 7 from the outside.

即ち、例えばワイヤ部材7が外側から引き出されることに伴い、可動側滑車群20(可動支持軸27)が、固定側滑車群19(固定支持軸24)に時計回り方向に近づく方向、つまり離間角度を小さくする方向に旋回移動する。また、例えばワイヤ部材7が外側から繰り入れられることに伴い、可動側滑車群20が、固定側滑車群19から反時計回り方向に離れる方向、つまり離間角度を大きくする方向に旋回移動する。このとき、ワイヤ部材7の外側からの引き出し又は繰り入れに伴う長さの変動を、可動側滑車群20の旋回、ひいては回転軸17の回転に変換することができる。   That is, for example, as the wire member 7 is pulled out from the outside, the movable side pulley group 20 (movable support shaft 27) approaches the fixed side pulley group 19 (fixed support shaft 24) clockwise, that is, the separation angle Move in the direction to make smaller. Further, for example, as the wire member 7 is inserted from the outside, the movable pulley group 20 pivots in the direction away from the fixed pulley group 19 in the counterclockwise direction, that is, in the direction for increasing the separation angle. At this time, it is possible to convert the fluctuation of the length accompanying the pulling out or the feeding from the outside of the wire member 7 into the swing of the movable pulley group 20 and, in turn, the rotation of the rotation shaft 17.

この減速機構14にあっては、ワイヤ部材7の長さの変動が大きくなるほど、可動側滑車群20の旋回量(旋回角度)ひいては回転軸17の回転量(回転角度)も大きくなる。尚、詳しく図示はしないが、本実施形態では、前記液槽2内の絶縁油3の液面Sが上昇すると、減速機構14内からワイヤ部材7が外側へ引き出され、液面Sが下降すると、外側からワイヤ部材7が繰り入れられるつまり減速機構14内に引き込まれるように構成されている。   In the speed reduction mechanism 14, the larger the fluctuation of the length of the wire member 7, the larger the turning amount (turning angle) of the movable pulley group 20 and hence the rotation amount (rotation angle) of the rotating shaft 17. Although not shown in detail, in the present embodiment, when the liquid level S of the insulating oil 3 in the liquid tank 2 rises, the wire member 7 is pulled out from the inside of the speed reduction mechanism 14 and the liquid level S falls. The wire member 7 is fed from the outside, that is, drawn into the speed reduction mechanism 14.

このとき、ワイヤ部材7は、例えば、液槽2内の絶縁油3の液面Sが最低液位(L)のときに、回転軸17が0°の位置となって表示針13が「LOW(0)」の目盛を指し示す、又は、液槽2内の絶縁油3の液面Sが最高液位(H)のときに、回転軸17が270°の位置となって表示針13が「HIGH(100)」の目盛を指し示すように、たるみのない状態でセットされる。これと共に、液槽2内における液面Sの変動幅Dに応じた減速機構14の減速比となるように、前記ワイヤ部材7の動滑車28及び定滑車25に掛けられる個数、及び、ワイヤ部材7の先端を固定する取付部の位置、即ち固定側取付部26と可動側取付部29とのどちらを使用するかが設定される。   At this time, for example, when the liquid level S of the insulating oil 3 in the liquid tank 2 is at the lowest liquid level (L), the rotating shaft 17 is at 0 ° and the display needle 13 is “LOW”. When the liquid surface S of the insulating oil 3 in the liquid tank 2 is at the highest liquid level (H), the rotary shaft 17 is at a position of 270 ° and the display needle 13 is It is set without slack so as to indicate the scale of "HIGH (100)". At the same time, the number of the wire member 7 to be hung on the moving pulley 28 and the fixed pulley 25 so that the reduction gear ratio of the reduction gear mechanism 14 corresponds to the fluctuation width D of the liquid surface S in the liquid tank 2 The position of the mounting portion for fixing the tip end of 7, that is, which of the fixed side mounting portion 26 and the movable side mounting portion 29 is used is set.

ここで、減速機構14における減速比を、回転軸17の回転量(角度)つまり可動支持軸27の旋回移動量(これを1とする)に対する、ワイヤ部材7の移動量つまり長さの変動量(N)の比、つまり1:Nの値と定義することができる。この場合、Nは自然数となる。ワイヤ部材7が動滑車28及び定滑車25に掛けられる個数が多くなるほど、ワイヤ部材7の移動量(長さの変動量)に対して、可動側滑車群20の旋回移動量が小さくなる関係にある。   Here, the reduction ratio in the reduction mechanism 14 is the amount of movement of the wire member 7, that is, the amount of fluctuation of the wire member 7 with respect to the amount of rotation (angle) of the rotary shaft 17, ie, the amount of pivotal movement of the movable support shaft 27 It can be defined as the ratio of (N), that is, a value of 1: N. In this case, N is a natural number. As the number of the wire members 7 placed on the moving pulley 28 and the constant pulley 25 increases, the amount of pivotal movement of the movable pulley group 20 decreases with respect to the amount of movement of the wire members 7 (variation in length). is there.

この場合、Nの値はワイヤ部材7の動滑車28及び定滑車25における折返し回数と一致する。例えば、ワイヤ部材7が動滑車28及び定滑車25に掛けられる個数を多くして減速比を大きくすることによって、小さな力でも、ワイヤ部材7の移動量を大きくとることにより、回転軸17側における大きな力(トルク)を発生させることができる。液面表示装置4にあっては、可動側滑車群20の移動範囲dと、液面Sの変動幅Dとの関係に応じて、減速機構14における減速比即ちNの値が、d:D=1:Nになるように設定される。これにより、ワイヤ部材7の移動量に対する回転軸17の回転量(回転角度)、つまり減速比を様々に変動(設定)させることが可能となる。   In this case, the value of N corresponds to the number of folds in the moving pulley 28 and the fixed pulley 25 of the wire member 7. For example, by increasing the number of the wire members 7 applied to the moving pulley 28 and the constant pulley 25 to increase the reduction ratio, the movement amount of the wire members 7 can be increased even with a small force. A large force (torque) can be generated. In the liquid level display device 4, the speed reduction ratio in the speed reduction mechanism 14, that is, the value of N is d: D according to the relationship between the movement range d of the movable pulley group 20 and the fluctuation width D of the liquid level S. = 1 is set to be N. As a result, the amount of rotation (rotation angle) of the rotation shaft 17 with respect to the amount of movement of the wire member 7, that is, the reduction ratio can be varied (set) in various ways.

また、ワイヤ部材7の一端側の固定位置によっても、減速比を変えることができる。具体的には、例えば可動側滑車群20の移動量を1とした場合の、それに対するワイヤ部材7の移動量Nを、奇数にしたい場合には可動側取付部29に固定すれば良く、偶数にしたい場合には、固定側取付部26に固定すれば良い。尚、上記減速比(Nの値)の大小によってワイヤ部材7全体、つまりケース10内に導入される部分の長さも変動し、減速比に応じた適切な長さとされることは勿論である。   The reduction ratio can also be changed by the fixing position on one end side of the wire member 7. Specifically, for example, when the moving amount N of the wire member 7 with respect to the moving amount of the movable side pulley group 20 is 1 when it is desired to make the moving amount N be an odd number, it may be fixed to the movable side attaching portion 29 If it is desired to fix it, it may be fixed to the fixed side mounting portion 26. Of course, the length of the entire wire member 7, that is, the length of the portion introduced into the case 10 also varies depending on the size of the reduction ratio (value of N), and the length is appropriately set according to the reduction ratio.

次の作用説明でも述べるように、本実施形態では、移動範囲dが例えば50mmであるから、液槽2内における液面Sの変動幅Dが、50mm(或いはそれ以下)である場合には、減速比のNの値が1とされる。変動幅Dが100mm(或いは50〜100mm)である場合には、減速比のNの値が2とされる。変動幅Dが150mm(或いは100〜150mm)である場合には、減速比のNの値が3とされる。途中を省略するが、同様にして、変動幅Dが500mm(或いは450〜500mm)である場合には、減速比のNの値が10とされる。   As described in the following description of the operation, in the present embodiment, since the movement range d is, for example, 50 mm, when the fluctuation width D of the liquid surface S in the liquid tank 2 is 50 mm (or less), The value N of the reduction ratio is set to one. When the fluctuation range D is 100 mm (or 50 to 100 mm), the value N of the reduction ratio is 2. When the fluctuation range D is 150 mm (or 100 to 150 mm), the value N of the reduction ratio is set to 3. Although the middle part is omitted, similarly, when the fluctuation range D is 500 mm (or 450 to 500 mm), the value N of the reduction ratio is set to 10.

次に、上記構成を備える減速機構14及び液面表示装置4の作用について、主として図6〜図14を参照して述べる。図6〜図14は、減速機構14における、ワイヤ部材7の動滑車28及び定滑車25に対する掛け方を例示するものである。図6及び図7はNの値が10の場合、図8及び図9はNの値が1の場合、図10及び図11はNの値が2の場合、図12及び図13はNの値が3の場合、図14はNの値が4の場合、を夫々例示している。尚、上記したように、これら図6〜図14は、回転軸17が45°の位置にある状態で示している。   Next, the operation of the speed reducing mechanism 14 and the liquid level display device 4 having the above-described configuration will be described mainly with reference to FIGS. 6 to 14 illustrate how the wire member 7 is hooked on the moving pulley 28 and the fixed pulley 25 in the speed reduction mechanism 14. 6 and 7 when the value of N is 10, FIGS. 8 and 9 when the value of N is 1, FIGS. 10 and 11 when the value of N is 2 and FIGS. 12 and 13 when N. When the value is 3, FIG. 14 illustrates the case where the value of N is 4, respectively. As described above, FIGS. 6 to 14 show the rotating shaft 17 in the state of 45 °.

図6及び図7に示すように、例えば液槽2内における液面Sの変動幅D(最低液位Lと最高液位Hとの差)が500mmの場合、減速機構14の減速比が1:10、つまりN=10となるように設定される。即ち、ワイヤ部材7の端部は、Nが偶数であるため、固定側滑車群19の固定側取付部26に固定される。次いで、ワイヤ部材7は、ドラム18の外周の最下段のガイド溝23内を矢印A方向(図6参照)にガイドされながら延び、可動側滑車群20の最下段の動滑車28に、矢印B方向に(図6参照)掛けられる。最下段の動滑車28で折返されたワイヤ部材7は、ドラム18の下から2番目のガイド溝23内を、矢印Aとは反対方向にガイドされて、固定側滑車群19部分に至る。   As shown in FIGS. 6 and 7, for example, when the fluctuation width D of the liquid surface S in the liquid tank 2 (the difference between the lowest liquid level L and the highest liquid level H) is 500 mm, the reduction ratio of the speed reduction mechanism 14 is 1 : 10, that is, N = 10. That is, the end portion of the wire member 7 is fixed to the fixed side attachment portion 26 of the fixed side pulley group 19 because N is an even number. Next, the wire member 7 extends in the lowermost guide groove 23 of the outer periphery of the drum 18 while being guided in the direction of arrow A (see FIG. 6). The lowermost moving pulley 28 of the movable pulley group 20 It is hung in the direction (see FIG. 6). The wire member 7 folded back by the lowermost moving pulley 28 is guided in the second guide groove 23 from the lower side of the drum 18 in the opposite direction to the arrow A, and reaches the stationary pulley group 19 portion.

そして、ワイヤ部材7は、固定側滑車群19の最下段の定滑車25に矢印C方向(図6参照)に掛けられて、矢印C´方向に折返される。この後、ワイヤ部材7は、ドラム18の下から3番目のガイド溝23内を、矢印A方向にガイドされ、可動側滑車群20の下から2番目の動滑車28に、矢印B方向に掛けられる。動滑車28で折返されたワイヤ部材7は、ドラム18のガイド溝23内を、矢印Aとは反対方向にガイドされて、固定側滑車群19部分に至り、1段ずつ上がりながら上記した動滑車28及び定滑車25間での折り返しが繰返される。   Then, the wire member 7 is hung on the lowermost fixed pulley 25 of the fixed side pulley group 19 in the direction of arrow C (see FIG. 6) and is turned back in the direction of arrow C ′. After that, the wire member 7 is guided in the third guide groove 23 from the bottom of the drum 18 in the direction of arrow A, and is hooked in the direction of arrow B on the second moving pulley 28 from the bottom of the movable pulley group 20 Be The wire member 7 folded back by the moving pulley 28 is guided in the guide groove 23 of the drum 18 in the direction opposite to the arrow A to reach the fixed pulley group 19 and moves up one step at a time. The folding between the fixed pulleys 28 and 25 is repeated.

このようにして、最上段(5番目)の動滑車28を折返されたワイヤ部材7は、ドラム18の最上段(下から10番目)のガイド溝23内を、矢印Aとは反対方向にガイドされて、固定側滑車群19部分に至り、最上段の定滑車25に矢印C方向に掛けられて導出される。この場合、液槽2内の絶縁油3の液面Sが最低液位(L)にあるときに、回転軸17が0°の位置にあって、表示針13が「LOW(0)」の目盛を指し示す位置に来るように、ワイヤ部材7がたるみのない状態でセット(浮き子5に接続)される。   Thus, the wire member 7 in which the moving pulley 28 of the top row (fifth) is folded back is guided in the guide groove 23 of the top row (the tenth from the bottom) of the drum 18 in the opposite direction to the arrow A. Then, it reaches the fixed-side pulley group 19 and is hung on the uppermost fixed pulley 25 in the direction of the arrow C and is derived. In this case, when the liquid level S of the insulating oil 3 in the liquid tank 2 is at the lowest liquid level (L), the rotary shaft 17 is at the position of 0 °, and the display needle 13 is “LOW (0)”. The wire member 7 is set (connected to the float 5) without slack so as to come to the position indicating the scale.

これにより、ワイヤ部材7の折返し数が10となり、減速機構14の減速比が、1:10(N=10)とされるので、液面Sの変動即ち浮き子5の上下動に伴う、ワイヤ部材7の移動量に対して、可動側滑車群20の旋回方向への移動量は、1/10となる。今、例えば、最低液位Lにあった液面Sが、最高液位Hまで例えば500mm上昇すると、ワイヤ部材7が減速機構14から外側に引き出され、そのワイヤ部材7の移動量(長さの変動)も500mmとなる。これにより、回転軸17の位置が0°(図5(a)参照)から、270°(図5(c)参照)まで回転し、表示針13が、「LOW(0)」の目盛から、「HIGH(100)」の目盛まで移動する。尚、回転軸17は、ぜんまいばね21により、0°の方向(反時計回り方向)に付勢されているので、液面S(浮き子5)が下降した場合には、ワイヤ部材7が外側から繰り入れられるようにして、回転軸17ひいては表示針13が、目盛の小さくなる方向に移動する。   As a result, the number of turns back of the wire member 7 becomes 10, and the reduction ratio of the reduction mechanism 14 is 1:10 (N = 10). Therefore, the wire accompanying the fluctuation of the liquid surface S, that is, the vertical movement of the float 5 The amount of movement of the movable pulley group 20 in the turning direction is 1/10 of the amount of movement of the member 7. Now, for example, when the liquid level S at the lowest liquid level L rises, for example, 500 mm to the highest liquid level H, the wire member 7 is pulled out from the speed reduction mechanism 14 and the movement amount of the wire member 7 (length Fluctuation) is also 500 mm. As a result, the position of the rotary shaft 17 rotates from 0 ° (see FIG. 5A) to 270 ° (see FIG. 5C), and the display hand 13 starts with the scale of “LOW (0)” Move to the "HIGH (100)" scale. Since the rotary shaft 17 is biased in the 0 ° direction (counterclockwise direction) by the mainspring 21, the wire member 7 is outside when the liquid level S (floater 5) is lowered. As a result, the rotary shaft 17 and thus the display hand 13 move in the direction in which the scale becomes smaller.

このように、液面表示装置4にあっては、絶縁油3の液面Sに浮かぶ浮き子5の位置に応じて、ワイヤ部材7のケース10内(減速機構14)に導入される部分の長さが変動し、減速機構14は、そのワイヤ部材7の長さの変動を、可動側滑車群20ひいては回転軸17の旋回(回転)位置に変換し、表示針13に伝達して液面Sの高さ位置を表示器6に表示することができる。作業者は、表示器6の表示針13の位置を見て、液槽2内の絶縁油3の液面Sの位置を知ることができ、必要な量の絶縁油3が貯留されているかどうかを容易に確認することができる。   As described above, in the liquid level display device 4, according to the position of the float 5 floating on the liquid surface S of the insulating oil 3, the portion of the wire member 7 introduced into the case 10 (speed reduction mechanism 14) The length changes, and the speed reduction mechanism 14 converts the change in the length of the wire member 7 into the movable (rotational) position of the movable pulley group 20 and the rotating shaft 17 and transmits it to the display needle 13 for liquid level The height position of S can be displayed on the display 6. The operator can see the position of the display needle 13 of the display 6 to know the position of the liquid level S of the insulating oil 3 in the liquid tank 2, and whether the necessary amount of insulating oil 3 is stored. Can be easily confirmed.

図8及び図9に示すように、例えば液槽2内における液面Sの変動幅D(最低液位Lと最高液位Hとの差)が50mmの場合、減速機構14の減速比が、N=1となるように設定される。このときには、Nが奇数であるため、ワイヤ部材7の端部は、可動側滑車群19の最下段の動滑車28に設けられた可動側取付部29に固定される。次いで、ワイヤ部材7は、ドラム18の外周の下から2番目のガイド溝23内を矢印Aとは反対方向にガイドされながら延び、固定側滑車群19の最下段の定滑車25に矢印C方向に掛けられて導出される。この場合も、液槽2内の絶縁油3の液面Sが最低液位(L)にあるときに、回転軸17が0°の位置にあって、表示針13が「LOW(0)」の目盛を指し示す位置に来るように、ワイヤ部材7がたるみのない状態でセット(浮き子5に接続)される。   As shown in FIGS. 8 and 9, for example, when the fluctuation width D of the liquid surface S in the liquid tank 2 (the difference between the lowest liquid level L and the highest liquid level H) is 50 mm, the reduction ratio of the speed reduction mechanism 14 is It is set to be N = 1. At this time, since N is an odd number, the end of the wire member 7 is fixed to the movable attachment portion 29 provided on the lowermost moving pulley 28 of the movable pulley group 19. Then, the wire member 7 extends in the second guide groove 23 from the lower side of the outer periphery of the drum 18 while being guided in the opposite direction to the arrow A, and the lower fixed pulley 25 of the fixed pulley group 19 extends in the arrow C direction. It is multiplied by and derived. Also in this case, when the liquid level S of the insulating oil 3 in the liquid tank 2 is at the lowest liquid level (L), the rotary shaft 17 is at the 0 ° position, and the display needle 13 is “LOW (0)” The wire member 7 is set (connected to the float 5) without slack so as to come to a position indicating the scale of.

これにより、減速機構14の減速比が、1:1(N=1)とされ、液面Sの変動即ち浮き子5の上下動に伴う、ワイヤ部材7の移動量に対して、可動側滑車群20の旋回方向への移動量が等しくなる。今、例えば、最低液位Lにあった液面Sが、最高液位Hまで例えば50mm上昇すると、ワイヤ部材7が減速機構14から外側に引き出され、そのワイヤ部材7の移動量(長さの変動)も50mmとなる。これにより、回転軸17の位置が0°から、270°まで回転し、表示針13が、「LOW(0)」の目盛から、「HIGH(100)」の目盛まで移動する。尚、液面S(浮き子5)が下降した場合には、やはり、ワイヤ部材7が外側から繰り入れられるようにして、回転軸17ひいては表示針13が、目盛の小さくなる方向に移動する。   Thereby, the reduction ratio of the reduction mechanism 14 is set to 1: 1 (N = 1), and the movable pulley is used for the movement amount of the wire member 7 accompanying the fluctuation of the liquid level S, ie, the vertical movement of the float 5 The amount of movement of the group 20 in the turning direction is equal. Now, for example, when the liquid level S at the lowest liquid level L rises, for example, 50 mm to the highest liquid level H, the wire member 7 is pulled out from the speed reduction mechanism 14 and the movement amount of the wire member 7 (length Fluctuation) is also 50 mm. As a result, the position of the rotary shaft 17 rotates from 0 ° to 270 °, and the display hand 13 moves from the scale of “LOW (0)” to the scale of “HIGH (100)”. In addition, when the liquid surface S (floater 5) is lowered, the rotating shaft 17 and the display needle 13 are moved in the direction of decreasing the scale, so that the wire member 7 can be fed from the outside.

図10及び図11に示すように、例えば液槽2内における液面Sの変動幅Dが100mmの場合、減速機構14の減速比が1:2(N=2)となる、つまりワイヤ部材7の折返し数が2となるように設定される。このときには、Nが偶数であるため、ワイヤ部材7の端部は、固定側取付部26に固定される。次いで、ワイヤ部材7は、ドラム18の外周の最下段のガイド溝23内を矢印A方向にガイドされながら延び、可動側滑車群20の最下段の動滑車28に、矢印B方向に掛けられる。   As shown in FIGS. 10 and 11, for example, when the fluctuation width D of the liquid surface S in the liquid tank 2 is 100 mm, the reduction ratio of the reduction mechanism 14 is 1: 2 (N = 2), that is, the wire member 7 Is set so that the number of turnbacks of is 2. At this time, since N is an even number, the end of the wire member 7 is fixed to the fixed side attachment portion 26. Next, the wire member 7 extends in the lowermost guide groove 23 of the outer periphery of the drum 18 while being guided in the direction of arrow A, and is hung on the lowermost moving pulley 28 of the movable pulley group 20 in the direction of arrow B.

最下段の動滑車28で折返されたワイヤ部材7は、ドラム18の下から2番目のガイド溝23内を、矢印Aとは反対方向にガイドされながら延び、固定側滑車群19の最下段の定滑車25に矢印C方向に掛けられて導出される。この場合も、液槽2内の絶縁油3の液面Sが最低液位(L)にあるときに、回転軸17が0°の位置にあって、表示針13が「LOW(0)」の目盛を指し示す位置に来るように、ワイヤ部材7がたるみのない状態でセット(浮き子5に接続)される。   The wire member 7 folded back by the lowermost moving pulley 28 extends in the second guide groove 23 from the lower side of the drum 18 while being guided in the opposite direction to the arrow A. It is hung on the fixed pulley 25 in the direction of the arrow C and is derived. Also in this case, when the liquid level S of the insulating oil 3 in the liquid tank 2 is at the lowest liquid level (L), the rotary shaft 17 is at the 0 ° position, and the display needle 13 is “LOW (0)” The wire member 7 is set (connected to the float 5) without slack so as to come to a position indicating the scale of.

これにより、減速機構14の減速比が、1:2(N=2)とされ、液面Sの変動即ち浮き子5の上下動に伴う、ワイヤ部材7の移動量に対して、可動側滑車群20の旋回方向への移動量が1/2となる。従って、例えば、最低液位Lにあった液面Sが、最高液位Hまで100mm上昇すると、ワイヤ部材7が引き出される移動量(長さの変動)が100mmとなることにより、回転軸17が0°から270°まで回転し、表示針13が、「LOW(0)」の目盛から「HIGH(100)」の目盛まで移動する。液面Sが下降した場合には、上記と同様に表示針13が目盛の小さくなる方向に移動する。   Thereby, the reduction ratio of the reduction mechanism 14 is set to 1: 2 (N = 2), and the movable pulley is used for the movement amount of the wire member 7 accompanying the fluctuation of the liquid surface S, that is, the vertical movement of the float 5 The amount of movement of the group 20 in the turning direction is 1⁄2. Therefore, for example, when the liquid level S at the lowest liquid level L rises 100 mm to the highest liquid level H, the rotation amount of the rotating shaft 17 is 100 mm as the movement amount (variation in length) to which the wire member 7 is pulled out becomes 100 mm. Rotating from 0 ° to 270 °, the display hand 13 moves from the scale of “LOW (0)” to the scale of “HIGH (100)”. When the liquid level S descends, the display needle 13 moves in the direction in which the scale becomes smaller, as described above.

図12及び図13に示すように、例えば液槽2内における液面Sの変動幅Dが150mmの場合、減速機構14の減速比が、N=3となる、つまりワイヤ部材7の折返し数が3となるように設定される。このときには、Nが奇数であるため、ワイヤ部材7の端部は、可動側滑車群19の最下段の動滑車28に設けられた可動側取付部29に固定される。次いで、ワイヤ部材7は、ドラム18の外周の下から2番目のガイド溝23内を矢印Aとは反対方向にガイドされながら延び、固定側滑車群19の最下段の定滑車25に矢印C方向に掛けられ、矢印C´方向に折返される。   As shown in FIGS. 12 and 13, for example, when the fluctuation width D of the liquid surface S in the liquid tank 2 is 150 mm, the reduction ratio of the reduction mechanism 14 is N = 3, that is, the number of turns of the wire member 7 is It is set to be 3. At this time, since N is an odd number, the end of the wire member 7 is fixed to the movable attachment portion 29 provided on the lowermost moving pulley 28 of the movable pulley group 19. Then, the wire member 7 extends in the second guide groove 23 from the lower side of the outer periphery of the drum 18 while being guided in the opposite direction to the arrow A, and the lower fixed pulley 25 of the fixed pulley group 19 extends in the arrow C direction. And is turned back in the direction of arrow C ′.

この後、ワイヤ部材7は、ドラム18の下から3番目のガイド溝23内を、矢印A方向にガイドされ、可動側滑車群20の下から2番目の動滑車28に、矢印B方向に掛けられる。動滑車28で折返されたワイヤ部材7は、ドラム18の下から4番目のガイド溝23内を、矢印Aとは反対方向にガイドされて、固定側滑車群19部分に至り、下から2番目の定滑車25に矢印C方向に掛けられて導出される。この場合も、液槽2内の絶縁油3の液面Sが最低液位(L)にあるときに、回転軸17が0°の位置にあって、表示針13が「LOW(0)」の目盛を指し示す位置に来るように、ワイヤ部材7がたるみのない状態でセット(浮き子5に接続)される。   After that, the wire member 7 is guided in the third guide groove 23 from the bottom of the drum 18 in the direction of arrow A, and is hooked in the direction of arrow B on the second moving pulley 28 from the bottom of the movable pulley group 20 Be The wire member 7 folded back by the moving pulley 28 is guided in the fourth guide groove 23 from the bottom of the drum 18 in the opposite direction to the arrow A to reach the stationary pulley group 19 and the second from the bottom Is pulled out in the direction of arrow C on the fixed pulley 25 of Also in this case, when the liquid level S of the insulating oil 3 in the liquid tank 2 is at the lowest liquid level (L), the rotary shaft 17 is at the 0 ° position, and the display needle 13 is “LOW (0)” The wire member 7 is set (connected to the float 5) without slack so as to come to a position indicating the scale of.

これにより、減速機構14の減速比が、1:3(N=3)とされ、液面Sの変動即ち浮き子5の上下動に伴う、ワイヤ部材7の移動量に対して、可動側滑車群20の旋回方向への移動量が1/3となる。従って、例えば、最低液位Lにあった液面Sが、最高液位Hまで150mm上昇すると、ワイヤ部材7が引き出される移動量(長さの変動)が150mmとなることにより、回転軸17が0°から270°まで回転し、表示針13が、「LOW(0)」の目盛から「HIGH(100)」の目盛まで移動する。液面Sが下降した場合には、上記と同様に表示針13が目盛の小さくなる方向に移動する。   Thereby, the reduction ratio of the reduction mechanism 14 is set to 1: 3 (N = 3), and the movable pulley is used for the movement amount of the wire member 7 accompanying the fluctuation of the liquid level S, ie, the vertical movement of the float 5 The amount of movement of the group 20 in the turning direction is 1/3. Therefore, for example, when the liquid level S at the lowest liquid level L rises 150 mm to the highest liquid level H, the rotating shaft 17 is moved by the movement amount (the variation of the length) by which the wire member 7 is pulled out becomes 150 mm. Rotating from 0 ° to 270 °, the display hand 13 moves from the scale of “LOW (0)” to the scale of “HIGH (100)”. When the liquid level S descends, the display needle 13 moves in the direction in which the scale becomes smaller, as described above.

図14に示すように、例えば液槽2内における液面Sの変動幅Dが200mmの場合、減速機構14の減速比が1:4(N=4)、つまりワイヤ部材7の折返し数が4となるように設定される。ここでは、減速機構14の平面図については、図6と変わりがないので省略する。このときには、Nが偶数であるため、ワイヤ部材7の端部は、固定側取付部26に固定される。次いで、ワイヤ部材7は、ドラム18の外周の最下段のガイド溝23内を矢印A方向にガイドされながら延び、可動側滑車群20の最下段の動滑車28に、矢印B方向に掛けられる。   As shown in FIG. 14, for example, when the fluctuation width D of the liquid surface S in the liquid tank 2 is 200 mm, the reduction ratio of the speed reduction mechanism 14 is 1: 4 (N = 4), that is, the number of turns of the wire member 7 is four. It is set to be Here, the plan view of the reduction gear mechanism 14 is omitted since it is the same as FIG. 6. At this time, since N is an even number, the end of the wire member 7 is fixed to the fixed side attachment portion 26. Next, the wire member 7 extends in the lowermost guide groove 23 of the outer periphery of the drum 18 while being guided in the direction of arrow A, and is hung on the lowermost moving pulley 28 of the movable pulley group 20 in the direction of arrow B.

最下段の動滑車28で折返されたワイヤ部材7は、ドラム18の下から2番目のガイド溝23内を、矢印Aとは反対方向にガイドされながら延び、固定側滑車群19の最下段の定滑車25に矢印C方向に掛けられ、矢印C´方向に折返される。この後、ワイヤ部材7は、ドラム18の下から3番目のガイド溝23内を、矢印A方向にガイドされ、可動側滑車群20の下から2番目の動滑車28に、矢印B方向に掛けられる。下から2番目の   The wire member 7 folded back by the lowermost moving pulley 28 extends in the second guide groove 23 from the lower side of the drum 18 while being guided in the opposite direction to the arrow A. The fixed pulley 25 is hung in the direction of arrow C and is turned back in the direction of arrow C '. After that, the wire member 7 is guided in the third guide groove 23 from the bottom of the drum 18 in the direction of arrow A, and is hooked in the direction of arrow B on the second moving pulley 28 from the bottom of the movable pulley group 20 Be Second from bottom

動滑車28で折返されたワイヤ部材7は、ドラム18の下から4番目のガイド溝23内を、矢印Aとは反対方向にガイドされて、固定側滑車群19部分に至り、下から2番目の定滑車25に矢印C方向に掛けられて導出される。この場合も、液槽2内の絶縁油3の液面Sが最低液位(L)にあるときに、回転軸17が0°の位置にあって、表示針13が「LOW(0)」の目盛を指し示す位置に来るように、ワイヤ部材7がたるみのない状態でセット(浮き子5に接続)される。   The wire member 7 folded back by the moving pulley 28 is guided in the fourth guide groove 23 from the bottom of the drum 18 in the opposite direction to the arrow A to reach the stationary pulley group 19 and the second from the bottom Is pulled out in the direction of arrow C on the fixed pulley 25 of Also in this case, when the liquid level S of the insulating oil 3 in the liquid tank 2 is at the lowest liquid level (L), the rotary shaft 17 is at the 0 ° position, and the display needle 13 is “LOW (0)” The wire member 7 is set (connected to the float 5) without slack so as to come to a position indicating the scale of.

これにより、減速機構14の減速比が、1:4(N=4)とされ、液面Sの変動即ち浮き子5の上下動に伴う、ワイヤ部材7の移動量に対して、可動側滑車群20の旋回方向への移動量が1/4となる。従って、例えば、最低液位Lにあった液面Sが、最高液位Hまで200mm上昇すると、ワイヤ部材7が引き出される移動量(長さの変動)が200mmとなることにより、回転軸17が0°から270°まで回転し、表示針13が、「LOW(0)」の目盛から「HIGH(100)」の目盛まで移動する。液面Sが下降した場合には、上記と同様に表示針13が目盛の小さくなる方向に移動する。尚、Nの値が5〜9となる場合に関する説明は省略するが、上記したような、Nの値が1〜4、10の場合に準じてワイヤ部材7をセットすることができる。   As a result, the reduction ratio of the reduction mechanism 14 is set to 1: 4 (N = 4), and the movable pulley is used with respect to the movement amount of the wire member 7 accompanying the fluctuation of the liquid level S, ie, the vertical movement of the float 5. The amount of movement of the group 20 in the turning direction is 1⁄4. Therefore, for example, when the liquid level S at the lowest liquid level L rises 200 mm to the highest liquid level H, the rotation amount of the rotating shaft 17 is 200 mm as the movement amount (the fluctuation of the length) to which the wire member 7 is pulled out becomes 200 mm. Rotating from 0 ° to 270 °, the display hand 13 moves from the scale of “LOW (0)” to the scale of “HIGH (100)”. When the liquid level S descends, the display needle 13 moves in the direction in which the scale becomes smaller, as described above. In addition, although the description regarding the case where the value of N will be 5-9 is abbreviate | omitted, the wire member 7 can be set according to the case where the value of N mentioned above is 1-4, and 10 like the above.

このように、本実施形態の液面表示装置4においては、上記構成の減速機構14を備えることにより、ワイヤ部材7が多くの動滑車28及び定滑車25に掛けられるほど、ワイヤ部材7の長さの変動に対し、可動側滑車群20の移動量ひいては回転軸17の回転量が小さくなる関係となる。そのため、液面Sの変動幅D(最低液位から最高液位までの上下方向寸法)が大きくなるほど、ワイヤ部材7の動滑車28及び定滑車25に掛ける個数をより多くすることにより、液面Sの変動幅Dの大きさが相違する液槽2に関して、表示器6(目盛板12及び表示針13)を共通としても液面Sの変動の表示が可能となる。   Thus, in the liquid level display device 4 of the present embodiment, the length of the wire member 7 is increased as the wire member 7 is hooked on many moving pulleys 28 and the fixed pulley 25 by providing the speed reducing mechanism 14 of the above configuration. The amount of movement of the movable pulley group 20 and hence the amount of rotation of the rotary shaft 17 become smaller relative to the fluctuation of the height. Therefore, as the fluctuation width D of the liquid surface S (the dimension in the vertical direction from the lowest liquid level to the highest liquid level) increases, the liquid surface is increased by increasing the number of the wire member 7 to be engaged on the moving pulley 28 and the fixed pulley 25. With regard to the liquid tank 2 in which the size of the fluctuation range D of S is different, the display of the fluctuation of the liquid surface S becomes possible even with the display 6 (the scale plate 12 and the display needle 13) in common.

上記した本実施形態の減速機構14によれば、次のような作用・効果を得ることができる。即ち、本実施形態の減速機構14は、ベース16上に、回転軸17、ドラム18、固定側滑車群19、可動側滑車群20を備え、ワイヤ部材7が、固定側滑車群19の定滑車25と、可動側滑車群20の動滑車28に、途中にドラム18でガイドされながら交互に掛けられる構成とした。これにより、ワイヤ部材7の外側からの引き出し又は繰り入れに伴うワイヤ部材7の長さの変動を、可動側滑車群20の回転軸17周りの旋回、ひいては回転軸17の回転に変換することができる。   According to the above-described speed reduction mechanism 14 of the present embodiment, the following operation and effect can be obtained. That is, the reduction gear mechanism 14 of the present embodiment includes the rotary shaft 17, the drum 18, the fixed side pulley group 19, and the movable side pulley group 20 on the base 16, and the wire member 7 is a fixed pulley of the fixed side pulley group 19. 25 and the moving pulley 28 of the movable pulley group 20 are alternately hooked while being guided by the drum 18 along the way. Thereby, the variation of the length of the wire member 7 accompanying the pulling out or the insertion from the outside of the wire member 7 can be converted into the rotation around the rotation axis 17 of the movable side pulley group 20 and hence the rotation of the rotation axis 17 .

このとき、ワイヤ部材7の長さの変動が大きくなるほど、可動側滑車群20の旋回量(旋回角度)ひいては回転軸17の回転量(回転角度)も大きくなるが、ワイヤ部材7が動滑車28及び定滑車25に掛けられる個数が多くなるほど、ワイヤ部材7の移動量(長さの変動量)に対して、可動側滑車群20の旋回移動量が小さくなる関係にある。それを利用して、ワイヤ部材7の移動量に対する回転軸17の回転量(回転角度)、つまり減速比を様々に変動させることが可能となった。例えば、ワイヤ部材7の動滑車28及び定滑車25に掛けられる個数を多くして減速比を大きくすることによって、小さな力でも、ワイヤ部材7の移動量を大きくとることにより、回転軸17側における大きな力(トルク)を発生させることができる。   At this time, the larger the fluctuation of the length of the wire member 7, the larger the amount of rotation (rotation angle) of the movable pulley group 20 and hence the amount of rotation of the rotation shaft 17 (rotation angle). And as the number of hooks on the fixed pulley 25 increases, the amount of rotation of the movable pulley group 20 decreases with respect to the amount of movement of the wire member 7 (the amount of fluctuation of the length). Using this, it has become possible to vary the amount of rotation (rotation angle) of the rotation shaft 17 with respect to the amount of movement of the wire member 7, that is, the speed reduction ratio. For example, by increasing the reduction ratio by increasing the number of the wire members 7 applied to the moving pulleys 28 and the fixed pulleys 25 and increasing the reduction ratio, the movement amount of the wire members 7 is increased by a small force. A large force (torque) can be generated.

また、本実施形態では、回転軸17(ドラム18)の外周側に、周方向に沿って、固定側滑車群19及び可動側滑車群20を配置すれば良いので、比較的簡単な構成で済ませることができる。しかも、ベース16に対し、構成要素である、回転軸17、ドラム18、固定側滑車群19、可動側滑車群20を、コンパクトに配置することができる。この結果、本実施形態の減速機構14によれば、比較的簡単な構成でコンパクトに済ませることができながら、様々な減速比に対応することが可能となるという優れた効果を得ることができる。   Further, in the present embodiment, since the fixed side pulley group 19 and the movable side pulley group 20 may be disposed along the circumferential direction on the outer peripheral side of the rotation shaft 17 (drum 18), a relatively simple configuration can be achieved. be able to. Moreover, the rotary shaft 17, the drum 18, the fixed pulley group 19, and the movable pulley group 20, which are components, can be compactly arranged with respect to the base 16. As a result, according to the speed reduction mechanism 14 of the present embodiment, it is possible to obtain an excellent effect that it is possible to cope with various speed reduction ratios while being compact with a relatively simple configuration.

本実施形態の液面表示装置4によれば、上記減速機構14を備え、液槽2内の液体の液面Sの高さの変動が、ワイヤ部材7の減速機構14内での長さの変動に変換され、そのワイヤ部材7の長さの変動を減速機構14によって、可動側滑車群20の旋回角度、ひいては回転軸17の回転角度に変換されるように構成した。従って、回転軸17の回転によって表示針13を駆動することにより、液面Sの高さ位置を表示することが可能となる。   According to the liquid level display device 4 of the present embodiment, the reduction gear mechanism 14 is provided, and the fluctuation of the height of the liquid level S of the liquid in the liquid tank 2 is the length of the wire member 7 in the reduction gear mechanism 14. It is converted into a fluctuation, and the fluctuation of the length of the wire member 7 is converted by the reduction mechanism 14 into the turning angle of the movable pulley group 20 and hence the rotation angle of the rotating shaft 17. Therefore, by driving the display needle 13 by the rotation of the rotary shaft 17, it is possible to display the height position of the liquid surface S.

この場合、上記した減速機構14を備えるので、減速比を変更することにより、液面Sの高さの変動量Dのレベルの異なる複数種類の機器に関して、液面表示装置4の共用が可能となる。即ち、動滑車28及び定滑車25にワイヤ部材7を掛ける個数を変えることにより、液面Sの変動幅Dが、移動距離dのN倍(整数倍)、50mm、100mm、150mm、200mm、…500mmの各油入絶縁変圧器1に対応させることが可能となった。また、上記したように、減速機構14を、比較的簡単な構成でコンパクトに済ませることができるので、液面表示装置4全体についても比較的簡単な構成でコンパクトに済ませことができる。   In this case, since the above-described reduction gear mechanism 14 is provided, it is possible to share the liquid surface display device 4 with respect to a plurality of types of devices having different levels of the fluctuation amount D of the height of the liquid surface S by changing the reduction gear ratio. Become. That is, by changing the number of times the wire member 7 is applied to the moving pulley 28 and the fixed pulley 25, the fluctuation width D of the liquid surface S is N times (integer multiple) of the moving distance d, 50 mm, 100 mm, 150 mm, 200 mm,. It became possible to correspond to each oil-filled insulation transformer 1 of 500 mm. Further, as described above, since the reduction mechanism 14 can be made compact with a relatively simple configuration, the entire liquid level display device 4 can also be made compact with a relatively simple configuration.

特に本実施形態の減速機構14においては、ワイヤ部材7の一端側を固定するために、固定側滑車群19に設けられた固定側取付部26、及び、可動側滑車群19に設けられた可動側取付部29を設け、減速比に応じて固定位置を設定さするように構成した。これにより、より多様な減速比に関する共用が可能となった。   Particularly, in the reduction gear mechanism 14 of the present embodiment, the fixed side attachment portion 26 provided on the fixed side pulley group 19 and the movable side provided on the movable side pulley group 19 in order to fix one end side of the wire member 7 The side attachment portion 29 is provided, and the fixing position is set according to the reduction ratio. This enables sharing of more various reduction ratios.

また、本実施形態の減速機構14においては、回転軸17を原点位置(0°の位置)に戻すための巻き戻し機構を備え、その巻き戻し機構を、回転軸17を原点位置に向けて付勢する付勢手段としてのぜんまいばね21から構成した。これにより、ワイヤ部材7ひいては回転軸17を双方向に容易に移動させることができる。ここで、例えば付勢手段をコイルばねから構成するような場合、可動側滑車群20の位置によってばね力が変動する事情があるが、ぜんまいばね21を採用することによって、可動側滑車群20の位置に関わらず、安定したばね力(付勢力)を得ることができる。ぜんまいばね21は、配置スペースも小さく済ませることができる。   Further, the speed reducing mechanism 14 of the present embodiment is provided with a rewinding mechanism for returning the rotary shaft 17 to the home position (0 ° position), and the rewind mechanism is attached with the rotary shaft 17 directed to the home position. It comprised from the mainspring spring 21 as a biasing means to bias. As a result, the wire member 7 and thus the rotating shaft 17 can be easily moved in both directions. Here, for example, in the case where the biasing means is constituted by a coil spring, there is a circumstance that the spring force fluctuates depending on the position of the movable side pulley group 20, but by adopting the main spring 21 Regardless of the position, a stable spring force (biasing force) can be obtained. The mainspring spring 21 can be arranged in a smaller space.

さらに、本実施形態の減速機構14においては、ドラム18の外周に、ワイヤ部材7をガイドするための円周方向に延びるガイド溝23を、定滑車25及び動滑車28の個数に対応して複数本、即ち往復で2倍の本数(この場合10本)を形成した。また、定滑車25及び動滑車28の軸方向間隔に対して、ガイド溝23が軸方向に2本が並ぶような位置関係とした。このようなガイド溝23にワイヤ部材7を沿わせて配置することによって、ワイヤ部材7同士が軸方向に接触して干渉するといったことなく、スムーズに移動させることができる。   Furthermore, in the reduction gear mechanism 14 of the present embodiment, a plurality of guide grooves 23 extending in the circumferential direction for guiding the wire member 7 are provided on the outer periphery of the drum 18 corresponding to the number of fixed pulleys 25 and moving pulleys 28. A double number (10 in this case) was formed in a book, that is, in a round trip. In addition, with respect to the axial distance between the fixed pulley 25 and the moving pulley 28, a positional relationship is such that two guide grooves 23 are aligned in the axial direction. By arranging the wire members 7 along the guide grooves 23 as described above, the wire members 7 can be smoothly moved without being in contact with and interfering with each other in the axial direction.

しかも、本実施形態では、ドラム18を、ベース16に対し固定的に設け、その外周面のガイド溝23内を低摩擦面として、ワイヤ部材7が摺動するように構成した。これにより、ワイヤ部材7が往復でドラム18の円周方向に関して逆方向(互いに逆の回転方向)に移動する事情があっても、ワイヤ部材7をスムーズに移動させることができ、例えば、ドラム18外周面とワイヤ部材7との間の摩擦力等によって、ドラム18がいずれかの方向に回転しようとして、ワイヤ部材7に異常な力がかかって引っ張られたり、逆にワイヤ部材7が緩んだ状態となったりする等のトラブルを未然に防止することができる。   Moreover, in the present embodiment, the drum 18 is fixedly provided to the base 16, and the wire member 7 is configured to slide with the inside of the guide groove 23 on the outer peripheral surface thereof being a low friction surface. As a result, even if the wire member 7 reciprocates in opposite directions (rotation directions opposite to each other) in the circumferential direction of the drum 18, the wire member 7 can be smoothly moved, for example, the drum 18 A state in which an abnormal force is applied to the wire member 7 and the wire member 7 is pulled in an attempt to rotate the drum 18 in any direction due to a frictional force between the outer peripheral surface and the wire member 7 or the like. It is possible to prevent problems such as becoming

尚、図示は省略するが、他の実施形態として、次のように構成することも可能である。即ち、液面表示装置4にあって、可動側滑車群20ひいては回転軸17の位置が0°即ち液面Sが最低液位Lまで下降したことを検出する検出スイッチを設けるようにしても良い。これによれば、液槽2からの絶縁油3の漏れ等が発生したときに、検出スイッチの検出に基づいて警報を出したり、変圧器1を非常停止させたりすることができ、安全性の向上を図ることができる。可動側滑車群20ひいては回転軸17の位置が270°即ち液面Sが最高液位Hまで上昇したことを検出する検出スイッチを設けるようにしても良い。これによれば、例えば液槽2内への絶縁油3の注入時において、検出スイッチの検出に基づいて作業者に報知したり、注入を自動で停止したりすることができ、作業性の向上を図ることができる。   In addition, although illustration is abbreviate | omitted, it is also possible to comprise as follows as another embodiment. That is, in the liquid level display device 4, a detection switch may be provided to detect that the movable side pulley group 20 and thus the position of the rotary shaft 17 is 0 °, that is, the liquid level S has dropped to the lowest liquid level L. . According to this, when a leak or the like of the insulating oil 3 from the liquid tank 2 occurs, an alarm can be issued based on the detection of the detection switch, or the transformer 1 can be brought to an emergency stop. It can improve. A detection switch may be provided to detect that the movable pulley group 20 and thus the position of the rotary shaft 17 is 270 °, that is, the liquid level S has risen to the highest liquid level H. According to this, for example, at the time of injection of the insulating oil 3 into the liquid tank 2, the operator can be notified based on the detection of the detection switch, or the injection can be automatically stopped, thereby improving the workability. Can be

また、上記実施形態の油入絶縁変圧器では、液槽内に貯留される液体として、鉱油からなる絶縁油を例にあげたが、鉱油以外の絶縁油全般や液体シリコーン、水等の冷却液であっても良い。液冷式電気機器としては、油入絶縁変圧器に限らず、リアクトルなど冷却液により機器本体の冷却及び絶縁を図るようにした液冷式電気機器全般に適用することもできる。液面表示装置としては、液冷式電気機器に限らず、液面の高さ位置を表示するもの全般に適用することができる。   Further, in the oil-filled insulation transformer of the above embodiment, the insulating oil made of mineral oil is exemplified as the liquid stored in the liquid tank, but the whole insulating oil other than mineral oil, liquid silicone, and coolant such as water It may be The liquid-cooled electrical device is not limited to the oil-filled insulation transformer, but can be applied to all types of liquid-cooled electrical devices in which cooling and insulation of the device body are intended by a coolant such as a reactor. The liquid level display device is not limited to the liquid-cooled type electric device, and can be applied to any device that displays the height position of the liquid level.

そして、上記実施形態では、減速機構14を、油入絶縁変圧器1の液面表示装置4に適用した場合を例にしたが、減速機構としても様々な機械器具に適用することが可能であり、例えばクレーン等の産業機械、産業用ロボットのアームの関節部の精密自動機器等、広く適用することができる。これらの場合、例えばモータでワイヤ部材を巻き取る、巻き戻すような構成とすることができ、減速比を大きくすることによって、小さな力でも、回転軸側における大きな力(トルク)を発生させることができる。   And although the case where the reduction gear mechanism 14 was applied to the liquid level display device 4 of the oil-insulated insulation transformer 1 was made into the example in the said embodiment, it is possible to apply to various machine tools also as a reduction gear mechanism. For example, industrial machines such as cranes, precision automatic devices for joints of arms of industrial robots, and the like can be widely applied. In these cases, for example, the wire member can be wound up or rewound by a motor, and a large force (torque) on the rotary shaft side can be generated even with a small force by increasing the reduction ratio. it can.

更に、回転軸を原点位置に付勢するための付勢手段としては、ぜんまいばね21に限らず、コイルばね等の他のばね、或いは重りなどを採用することも可能である。付勢手段を、ドラム18内に設ける構成とすれば、省スペース化をより一層図ることができる。また、回転軸を原点位置に戻すための巻き戻し機構として、別途のモータ等の駆動源を備えて構成することもできる。同様の構成の第2の減速機構を、元の減速機構に対し回転軸を共通として対称的に組み合わせて、その第2の減速機構によって、回転軸を逆転方向に駆動することにより、巻き戻し機構を構成することも可能である。固定側取付部を定滑車25に設けたり、可動側取付部を可動支持軸27に設けるようにしても良い。上記実施形態では説明しなかったが、定滑車25及び動滑車28の摺動面についても、テフロン加工等を施し低摩擦面とすることができる。   Furthermore, as biasing means for biasing the rotating shaft to the home position, not only the mainspring 21 but also other springs such as a coil spring or weights may be employed. If the biasing means is provided in the drum 18, space saving can be further achieved. Further, as a rewinding mechanism for returning the rotation shaft to the home position, a drive source such as an additional motor may be provided. A second decelerating mechanism having the same configuration is symmetrically combined with the original decelerating mechanism with the rotating shaft in common, and the second decelerating mechanism drives the rotating shaft in the reverse direction to rewind the mechanism. It is also possible to configure The fixed side attachment portion may be provided on the fixed pulley 25 or the movable side attachment portion may be provided on the movable support shaft 27. Although not described in the above embodiment, the sliding surfaces of the fixed pulley 25 and the moving pulley 28 can also be treated with Teflon or the like to provide a low friction surface.

その他、動滑車28及び定滑車25を設ける個数やガイド溝23の本数、液面Sの変動幅D、移動範囲d等の数値についても、一例を示したに過ぎず、適宜変更が可能である。以上説明した実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。   In addition, numerical values such as the number of moving pulleys 28 and fixed pulleys 25 provided, the number of guide grooves 23, the fluctuation width D of the liquid surface S, the movement range d, etc. are only an example and can be changed as appropriate. . The embodiments described above are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

図面中、1は油入絶縁変圧器(液冷式電気機器)、2は液槽、3は絶縁油(液体)、4は液面表示装置、5は浮き子(移動部材)、6は表示器、7はワイヤ部材、10はケース、12は目盛板、13は表示針、14は減速機構、16はベース、17は回転軸、18はドラム、19は固定側滑車群、20は可動側滑車群、21はぜんまいばね(付勢手段)、22は連結部、23はガイド溝、24は固定支持軸、25は定滑車、26は固定側取付部、27は可動支持軸、28は動滑車、29は可動側取付部、Sは液面を示す。   In the drawings, 1 is an oil filled insulation transformer (liquid cooled electrical device), 2 is a liquid tank, 3 is an insulating oil (liquid), 4 is a liquid level display device, 5 is a float (moving member), and 6 is a display 7, 7 is a wire member, 10 is a case, 12 is a scale, 13 is a display hand, 14 is a reduction mechanism, 16 is a base, 17 is a rotating shaft, 18 is a drum, 19 is a fixed pulley group, 20 is a movable side Pulley group, 21: spring spring (biasing means), 22: connection part, 23: guide groove, 24: fixed support shaft, 25: fixed pulley, 26: fixed side attachment part, 27: movable support shaft, 28: movable A pulley, 29 indicates a movable side attachment portion, and S indicates a liquid level.

Claims (8)

ベースに回転可能に支持された回転軸と、
前記回転軸の周りに同軸に配置されたワイヤガイド用のドラムと、
前記ベースに前記ドラムの外周側に位置し前記回転軸と平行に延びて固定的に設けられた固定支持軸と、その固定支持軸に軸方向に重なるように夫々回転自在に嵌挿された複数の定滑車とを備える固定側滑車群と、
前記回転軸から放射方向に延びる連結部を介して連結され前記ドラムの外周側を該回転軸と平行に延び前記回転軸を中心に旋回可能に設けられた可動支持軸と、その可動支持軸に軸方向に重なるように夫々回転自在に嵌挿された複数の動滑車とを備える可動側滑車群と、
前記ベースに対する固定部位又は前記可動側滑車群に一端側が固定され、他端側が外部に配置されて外側から引き出し又は繰り入れされるワイヤ部材とを備え、
前記ワイヤ部材は、前記ドラムの外周にガイドされながら、前記定滑車と動滑車とに交互に掛けられ、該ワイヤ部材の外側からの引き出し又は繰り入れにより、該ワイヤ部材の移動を減速して前記回転軸の回転に変換するように構成された減速機構。
A rotating shaft rotatably supported on the base,
A wire guide drum coaxially arranged around the rotation axis;
A fixed support shaft located on the outer peripheral side of the drum and extending in parallel with the rotation shaft and fixedly provided on the base, and a plurality of rotatably inserted so as to overlap the fixed support shaft in the axial direction Fixed side pulley group provided with a fixed pulley of
A movable support shaft which is connected via a connecting portion extending in a radial direction from the rotation shaft, extends parallel to the rotation shaft along the outer peripheral side of the drum, and is movable around the rotation shaft; A movable pulley group including a plurality of movable pulleys rotatably inserted so as to overlap in the axial direction;
And a wire member whose one end is fixed to the fixed portion to the base or the movable pulley group and whose other end is disposed outside and pulled out or fed in from the outside,
The wire member is alternately hooked to the fixed pulley and the moving pulley while being guided to the outer periphery of the drum, and the movement of the wire member is decelerated by the drawing or feeding from the outside of the wire member to rotate the rotation. A reduction mechanism that is configured to convert to shaft rotation.
前記ワイヤ部材の前記定滑車及び動滑車に掛けられる個数が、減速比に応じて設定される請求項1記載の減速機構。   The speed reduction mechanism according to claim 1, wherein the number of the wire members to be hung on the constant pulley and the moving pulley is set in accordance with a speed reduction ratio. 前記ワイヤ部材の一端側は、前記固定側滑車群に設けられた固定側取付部、及び、前記可動側滑車群に設けられた可動側取付部のいずれかに固定されると共に、その固定位置が、減速比に応じて設定される請求項1又は2記載の減速機構。   One end side of the wire member is fixed to one of a fixed side mounting portion provided to the fixed side pulley group and a movable side mounting portion provided to the movable side pulley group, and the fixed position is fixed. The speed reduction mechanism according to claim 1 or 2, which is set according to the speed reduction ratio. 前記回転軸を原点位置に戻すための巻き戻し機構を備える請求項1から3のいずれか一項に記載の減速機構。   The speed reducing mechanism according to any one of claims 1 to 3, further comprising a rewinding mechanism for returning the rotating shaft to an origin position. 前記巻き戻し機構は、前記回転軸を原点位置に付勢する付勢手段を備え、前記付勢手段は、ぜんまいばねから構成される請求項4記載の減速機構。   5. The speed reduction mechanism according to claim 4, wherein the rewinding mechanism comprises biasing means for biasing the rotating shaft to the home position, and the biasing means comprises a mainspring. 前記ドラムの外周には、前記ワイヤ部材をガイドするための円周方向に延びるガイド溝が、前記定滑車及び動滑車に対応して複数本形成されている請求項1から5のいずれか一項に記載の減速機構。   The circumferentially extending guide groove for guiding the wire member is formed on the outer periphery of the drum in a plurality corresponding to the fixed pulley and the movable pulley. The reduction mechanism described in. 前記ドラムは、前記ベースに固定的に設けられており、その外周面を前記ワイヤ部材が摺動するように構成されている請求項1から6のいずれか一項に記載の減速機構。   The speed reduction mechanism according to any one of claims 1 to 6, wherein the drum is fixedly provided to the base, and the wire member is configured to slide on an outer peripheral surface thereof. 液体が貯留された液槽内に配置され、前記液体の液面の変動に連動して上下方向に移動する移動部材と、
前記液体の液面の高さ位置を表示する表示器とを備え、
前記表示器は、前記液面の高さ位置に対応した目盛を円弧状に配置してなる目盛板と、回転移動により先端が前記目盛板の目盛を指し示す表示針と、請求項1から7のいずれか一項に記載の減速機構とを備え、
前記減速機構の前記ワイヤ部材の他端側に前記移動部材が接続されると共に、前記減速機構の前記回転軸に前記表示針が連結されて回転移動されるように構成されている液面表示装置。
A moving member that is disposed in a liquid tank in which liquid is stored, and moves in the vertical direction in conjunction with fluctuations in the liquid surface of the liquid;
And a display for displaying the level position of the liquid level of the liquid,
The indicator according to any one of claims 1 to 7, wherein the indicator has a scale plate in which a scale corresponding to the height position of the liquid surface is arranged in an arc, a display needle whose tip moves to the scale of the scale by rotational movement. And the reduction mechanism described in any one of
The liquid level display device is configured such that the moving member is connected to the other end side of the wire member of the speed reduction mechanism, and the display needle is connected to the rotation shaft of the speed reduction mechanism so as to be rotationally moved. .
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JPS5179464A (en) * 1974-12-28 1976-07-10 Izumi Denki Seisakusho Kk ROBOTSUTOA AMUNO KANSETSUKUDO HOSHIKI
JPS5691654U (en) * 1979-12-17 1981-07-21
JPS57149410U (en) * 1981-03-16 1982-09-20
JPS5880737U (en) * 1981-11-26 1983-06-01 住友電気工業株式会社 Oil level gauge for oil tank
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JP2001141017A (en) * 1999-11-16 2001-05-25 Nkd:Kk Power transmission device holding cords and pulleys in guide rail and its end parts
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5179464A (en) * 1974-12-28 1976-07-10 Izumi Denki Seisakusho Kk ROBOTSUTOA AMUNO KANSETSUKUDO HOSHIKI
JPS5691654U (en) * 1979-12-17 1981-07-21
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JPS5880737U (en) * 1981-11-26 1983-06-01 住友電気工業株式会社 Oil level gauge for oil tank
JPS5882029U (en) * 1981-11-28 1983-06-03 パイオニア株式会社 Tuning operation device
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JP2001141017A (en) * 1999-11-16 2001-05-25 Nkd:Kk Power transmission device holding cords and pulleys in guide rail and its end parts
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