JP2003042856A - Temperature detector - Google Patents
Temperature detectorInfo
- Publication number
- JP2003042856A JP2003042856A JP2001234477A JP2001234477A JP2003042856A JP 2003042856 A JP2003042856 A JP 2003042856A JP 2001234477 A JP2001234477 A JP 2001234477A JP 2001234477 A JP2001234477 A JP 2001234477A JP 2003042856 A JP2003042856 A JP 2003042856A
- Authority
- JP
- Japan
- Prior art keywords
- spring
- coil spring
- temperature
- movable member
- cylindrical body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、例えば、蒸気配管
に取り付けられるスチームトラップの動作不良に伴う蒸
気配管の温度の低下を検出して視認可能な異常表示を行
う用途に用いられる温度検出器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature detector used for, for example, detecting a decrease in the temperature of a steam pipe due to a malfunction of a steam trap attached to the steam pipe and performing a visible abnormality display. It is a thing.
【0002】[0002]
【従来の技術】例えば、スチームトラップに性能劣化や
故障などに起因する動作不良が生じた場合には、復水が
溜まり過ぎて蒸気配管の温度が低下する。そこで、従来
では、蒸気配管の温度を簡易的に検出してその検出温度
に基づきスチームトラップのような機器の正常または異
常の別を視認可能に表示する温度検出器が案出されてい
る。この温度検出器として、形状記憶合金製のコイルば
ねの記憶形状によっておおよその検知温度を設定するも
のがあり、蒸気配管などの被温度検出体が検知温度以下
になったときに、視認可能な警告表示を行うようになっ
ており、多くの産業分野で利用されている。このような
温度検出器としては、特開平10−62267号公報に
開示の配管の温度表示装置(以下、第1の従来技術とい
う)、実用新案登録第2531859号公報に開示のド
レン排出装置用作動表示器(以下、第2の従来技術とい
う)および実用新案登録第2531860号公報に開示
のドレン排出装置用作動表示器(以下、第3の従来技術
という)が知られている。2. Description of the Related Art For example, when an operation failure occurs in a steam trap due to performance deterioration or failure, the condensate water accumulates excessively and the temperature of the steam pipe lowers. Therefore, conventionally, a temperature detector has been devised which simply detects the temperature of the steam pipe and visually displays whether the device is normal or abnormal based on the detected temperature. As this temperature detector, there is one that sets an approximate detection temperature by the memory shape of the coil spring made of shape memory alloy, and when the temperature detection target such as steam piping falls below the detection temperature, a visible warning It is designed to display and is used in many industrial fields. Examples of such a temperature detector include a pipe temperature display device disclosed in Japanese Patent Laid-Open No. 10-62267 (hereinafter referred to as a first prior art), and a drain discharge device operation disclosed in Utility Model Registration No. 2531859. An indicator (hereinafter referred to as a second conventional technology) and an operation indicator for a drain discharge device (hereinafter referred to as a third conventional technology) disclosed in Japanese Utility Model Registration No. 2531860 are known.
【0003】前記第1の従来技術は、形状記憶合金製の
コイルばねを、被温度検出体の蒸気配管の外周に巻装し
てその一端を蒸気配管に固定し、コイルばねの他端側に
可動リングを蒸気配管の長手方向に移動可能に外挿し、
可動リングを、バイアスばねでコイルばねが縮む方向に
付勢し、基端が可動リングに係合された指針によって、
可動リングの位置に応じた配管の温度を表示する。これ
により、配管の温度を指針の指示値によって目視で確認
できる。In the first prior art described above, a coil spring made of a shape memory alloy is wound around the outer circumference of a steam pipe of a temperature detection object, one end of which is fixed to the steam pipe, and the other end of the coil spring is attached. The movable ring is extrapolated so that it can move in the longitudinal direction of the steam pipe,
The biasing spring biases the movable ring in the direction in which the coil spring contracts, and the base end is engaged with the movable ring by the pointer.
Displays the temperature of the pipe according to the position of the movable ring. Thereby, the temperature of the pipe can be visually confirmed by the indicated value of the pointer.
【0004】前記第2の従来技術は、形状記憶合金製の
コイルばねの上端を、被温度検出体の蒸気配管に取り付
けられる外筒内に懸け渡したピンに固定し、且つコイル
ばねの下端に錘を吊り下げ、外筒の温度によってコイル
ばねが伸長状態または収縮状態になることにより、錘を
外筒の外部に露出または外筒内に収容する構成になって
いる。これにより、錘が外筒から露出しているか否かに
よって蒸気配管が所定温度であるか否かを一目瞭然に視
認できる。In the second conventional technique, the upper end of a coil spring made of a shape memory alloy is fixed to a pin suspended in an outer cylinder attached to a steam pipe of a temperature detection object, and the lower end of the coil spring is fixed. The weight is suspended and the coil spring is expanded or contracted depending on the temperature of the outer cylinder, so that the weight is exposed to the outside of the outer cylinder or housed in the outer cylinder. With this, it is possible to see at a glance whether or not the steam pipe is at a predetermined temperature depending on whether or not the weight is exposed from the outer cylinder.
【0005】前記第3の従来技術は、形状記憶合金製の
コイルばねの上端を、被温度検出体の蒸気配管に取り付
けられる外筒の内面上部に固定し、且つコイルばねの下
端を回転自在のレバーの支点と一端のウエイトとの間に
連結し、レバーの他端を、外筒に沿ってマーカーガイド
内を移動可能なマーカーに連結扞を介して連結した構成
になっている。これにより、マーカーがマーカーガイド
から露出しているか否かによって蒸気配管が所定温度で
あるか否かを一目瞭然に視認できる。In the third conventional technique, the upper end of a coil spring made of a shape memory alloy is fixed to the upper part of the inner surface of an outer cylinder attached to the steam pipe of the temperature detection object, and the lower end of the coil spring is rotatable. The lever is connected between the fulcrum and the weight at one end, and the other end of the lever is connected to a marker movable in the marker guide along the outer cylinder via a connecting rod. Thereby, it is possible to visually recognize whether or not the steam pipe is at the predetermined temperature depending on whether or not the marker is exposed from the marker guide.
【0006】[0006]
【発明が解決しようとする課題】しかしながら、前記第
1の従来技術では、形状記憶合金製のコイルばねを蒸気
配管の外周に直接巻き付ける構成であるため、被温度検
出体が蒸気配管のような円筒体に限定されてしまうだけ
でなく、蒸気配管の径または長さの相違に対応してコイ
ルばねの径および長さを変更する必要があるので、汎用
的な温度検出器となりえない。また、形状記憶合金製の
コイルばねは、屋外に設置する場合に外気に露呈した取
付状態となるから、特に冬場の冷気を受けたとき、蒸気
配管の温度が設定値よりも高いにもかかわらず、コイル
ばねの温度が設定値以下に低下して、動作不良を生じる
おそれがある。そこで、一般に、蒸気配管の無駄な放熱
を防止する手段として、ベルト状の保温材を蒸気配管に
巻き付けて外気から遮断することがよく行われている
が、露出したコイルばねを保温材で覆うと、保温材がコ
イルばねを押さえ付けるため、コイルばねの動作を妨げ
るという難点がある。さらに、蒸気配管の外周に巻装し
たコイルばねとバイアスばねとの間には、可動部を蒸気
配管の長手方向に移動可能に設けるとともに、この可動
部には、表示部に回転可能に取り付けた指針の基端部を
係合させる必要があるので、取り付け作業が面倒であ
る。However, in the first prior art, since the coil spring made of a shape memory alloy is wound directly around the outer circumference of the steam pipe, the temperature-detected body is a cylinder like the steam pipe. In addition to being limited to the body, the diameter and length of the coil spring need to be changed according to the difference in the diameter or length of the steam pipe, so that it cannot be a general-purpose temperature detector. Also, the shape memory alloy coil spring is exposed to the outside air when it is installed outdoors, so even when the cold air in the winter is received, the temperature of the steam pipe is higher than the set value. However, the temperature of the coil spring may fall below the set value, causing malfunction. Therefore, in general, as a means for preventing wasteful heat dissipation of the steam pipe, it is often done to wind a belt-shaped heat insulating material around the steam piping to shield it from the outside air, but when the exposed coil spring is covered with the heat insulating material. Since the heat insulating material presses the coil spring, there is a problem that the operation of the coil spring is hindered. Further, a movable part is provided between the coil spring wound around the outer circumference of the steam pipe and the bias spring so as to be movable in the longitudinal direction of the steam pipe, and the movable part is rotatably attached to the display part. Since the base end of the pointer needs to be engaged, the mounting work is troublesome.
【0007】一方、前記第2の従来技術では、第1の従
来技術のバイアスばねに代えて錘を用いているため、垂
直配置の取り付けが条件となり、スチームトラップなど
の適用機器の取付方向や大きさによっては使用範囲が制
限される可能性があるものの、スチームトラップの大き
さに依らず外筒や形状記憶合金製のコイルばねなどの形
状および寸法を画一化でき、汎用的な温度検出器として
コンパクトにまとめられる利点がある。On the other hand, in the second prior art, since the weight is used instead of the bias spring in the first prior art, vertical installation is a condition, and the installation direction and size of the applicable equipment such as the steam trap are large. Depending on the size, the range of use may be limited, but the shape and dimensions of the outer cylinder and the coil spring made of shape memory alloy can be standardized regardless of the size of the steam trap, making it a general-purpose temperature detector. Has the advantage of being compactly summarized.
【0008】その反面、形状記憶合金製のコイルばね
は、外筒の周壁に懸け渡した細いピンに上端を引っ掛け
た状態で取り付けているので、コイルばねの受熱手段と
しては、外筒からの輻射熱のみに依存せざるを得ないか
ら、基本構成として外筒内部を密閉する必要がある。そ
のような構成とした場合においても、輻射のみではコイ
ルばねへの伝熱性が悪いので、外筒の温度変化に対する
形状記憶合金製のコイルばねの温度追従性に問題が残
り、コイルばねが外筒の温度変化に反応するまでにかな
りの時間が経過したり、外筒の温度に対するコイルばね
の形状変化にずれが生じる結果を招き易く、温度の検出
感度が低いものとなる。また、前記第3の従来技術にお
いても、上述した第2の従来技術とほぼ同様の問題があ
る。On the other hand, the shape memory alloy coil spring is attached with its upper end hooked on a thin pin hung on the peripheral wall of the outer cylinder. Therefore, the heat receiving means of the coil spring is radiant heat from the outer cylinder. It is necessary to hermetically seal the inside of the outer cylinder as a basic configuration because there is no choice but to rely only on this. Even with such a configuration, since the heat transfer to the coil spring is poor only by radiation, the temperature followability of the shape memory alloy coil spring with respect to the temperature change of the outer cylinder remains a problem, and the coil spring is A considerable amount of time elapses before reacting to the temperature change, and a change in the shape of the coil spring with respect to the temperature of the outer cylinder tends to be deviated, resulting in low temperature detection sensitivity. Further, the third conventional technique also has substantially the same problem as the above-described second conventional technique.
【0009】本発明は、前記従来の課題に鑑みてなされ
たもので、外気環境やその温度変化に拘わらず被温度検
出体から形状記憶合金製のコイルばねへの確実な伝熱性
を常に維持でき、コンパクトな構成で汎用性に優れた温
度検出器を提供することを目的としている。The present invention has been made in view of the conventional problems described above, and it is possible to always maintain a reliable heat transfer from the temperature-detected body to the coil spring made of a shape memory alloy regardless of the outside air environment and its temperature change. The purpose of the present invention is to provide a temperature detector having a compact structure and excellent versatility.
【0010】[0010]
【課題を解決するための手段】上記目的を達成するため
に、本発明の一構成に係る温度検出器は、被温度検出体
に接触して受熱する筒体と、前記筒体内に収納されて所
定の温度範囲で記憶形状を保持する形状記憶合金製のコ
イルばねと、前記筒体の内面に接触して固定される外周
面を持つ胴部と前記コイルばねの一端部に螺合してこの
一端部を保持するねじ部とを有する伝熱性のばね固定具
と、前記コイルばねの他端部に螺合してこの他端部を保
持するねじ部を一端部に有し、前記筒体内でその軸心方
向に移動可能に配置された可動部材と、前記可動部材の
他端部に取り付けられて前記筒体に対して外方に突出ま
たは内方に没入することによって表示を行う表示部と、
前記コイルばねの記憶された形状の保持力によって前記
可動部材が受けるばね力と反対方向のばね力を前記可動
部材に付加するバイアスばねとを備え、前記筒体は、少
なくとも前記ばね固定具および形状記憶状態のコイルば
ねの外周に対向する部分が伝熱性の材料で形成されてい
る。In order to achieve the above object, a temperature detector according to one aspect of the present invention includes a cylindrical body which comes into contact with a temperature-detected body to receive heat, and a cylindrical body which is housed in the cylindrical body. A coil spring made of a shape memory alloy that retains a memorized shape in a predetermined temperature range, a body having an outer peripheral surface that is fixed in contact with the inner surface of the tubular body, and one end of the coil spring screwed together. A heat-conducting spring fixture having a screw portion that holds one end portion, and a screw portion that is screwed to the other end portion of the coil spring and holds the other end portion at one end portion, and in the tubular body A movable member disposed so as to be movable in the axial direction, and a display unit attached to the other end of the movable member for displaying by protruding outward or immersing inward with respect to the cylindrical body. ,
A bias spring for applying to the movable member a spring force in a direction opposite to the spring force received by the movable member by the stored holding force of the coil spring, and the tubular body includes at least the spring fixture and the shape. The portion facing the outer circumference of the coil spring in the memory state is formed of a heat conductive material.
【0011】この温度検出器では、被温度検出体から筒
体、ばね固定具の胴部およびねじ部を通じて形状記憶合
金製のコイルばねに熱伝導で熱が伝わり、被温度検出体
の温度が一定範囲、例えば一定値以上を保持している場
合には、この被温度検出体から熱伝導で受熱したコイル
ばねも所定の温度範囲、例えば形状記憶温度以上を保っ
て予め記憶された形状(例えば収縮形状)を保持し、可
動部材がバイアスばねのばね力に抗してコイルばねの形
状保持力によって引っ張られて、表示部が筒体内に収容
されている。被温度検出体が一定範囲から外れると、例
えば一定温度以下に低下すると、コイルばねの温度は、
所定の温度範囲から外れて記憶形状の保持力を維持でき
なくなるので、バイアスばねは、コイルばねのばね力に
打ち勝って可動部材をコイルばねから離間する方向に移
動させる。これにより、可動部材に取り付けられている
表示部は、筒体から突出または没入して、被温度検出体
が一定温度範囲から外れたことを視認可能に表示する。In this temperature detector, heat is transferred from the object to be detected to the coil spring made of a shape memory alloy through the cylindrical body, the body of the spring fixture and the screw part by heat conduction, and the temperature of the object to be detected is constant. When a range, for example, a certain value or more is held, the coil spring that receives heat from this temperature-detecting body by heat conduction also maintains a predetermined temperature range, for example, a shape memory temperature or higher, and a previously stored shape (for example, contraction). The shape is maintained and the movable member is pulled by the shape retaining force of the coil spring against the spring force of the bias spring, and the display unit is housed in the cylinder. If the object to be detected is out of a certain range, for example, if it falls below a certain temperature, the temperature of the coil spring becomes
Since the holding force of the memory shape cannot be maintained outside the predetermined temperature range, the bias spring overcomes the spring force of the coil spring and moves the movable member in the direction away from the coil spring. Accordingly, the display unit attached to the movable member projects or retracts from the cylindrical body and visually displays that the temperature detection target is out of the constant temperature range.
【0012】また、この温度検出器は、被温度検出体に
接触して受熱する筒体の内面に、ばね固定具の胴部の外
周面が接触して大きな受熱面積を確保した相対位置で固
定され、さらに、ばね固定具のねじ部に、コイルばねの
一端部が螺合しているから、単に平滑な円周面を持つ環
状溝にコイルばねを巻き付ける場合に比べて、前記一端
部が安定して保持されるうえに、接触面積、つまり受熱
面積が大きくなるから、筒体が被温度検出体から受熱し
た熱がコイルばねに対し、熱伝導により効率的に伝わ
る。しかも、コイルばねは、筒体の内面からの輻射熱に
よっても受熱するので、コイルばねは、被温度検出体が
検知温度以下または以上となったときに正確、且つ迅速
に反応して形状変化する。また、コイルばねは、筒体内
に収納されているので、屋外に設置した場合にも外気の
温度変化の影響を受けにくい。さらに、各構成部材は筒
体内に収納された構成になっているとともに、取り付け
に際しては、筒体を被温度検出体に接触させて固定する
だけの簡単な作業を行うだけでよいので、汎用的な温度
検出器として利用することができる。また、筒体は、被
温度検出体の形状や寸法に拘わらず、形状および寸法を
画一化してコンパクトなものにすることができる。Further, in this temperature detector, the outer peripheral surface of the body of the spring fixture comes into contact with the inner surface of the cylindrical body which comes into contact with the temperature-detected body to receive heat, and is fixed at a relative position where a large heat-receiving area is secured. Furthermore, since one end of the coil spring is screwed into the screw part of the spring fixture, the one end is stable compared to the case where the coil spring is simply wound around an annular groove having a smooth circumferential surface. Since the contact area, that is, the heat receiving area is increased, the heat received by the tubular body from the temperature detection target is efficiently transferred to the coil spring by heat conduction. In addition, since the coil spring also receives heat by radiant heat from the inner surface of the cylindrical body, the coil spring reacts accurately and quickly when the temperature detection target temperature falls below or above the detection temperature, and changes its shape. Further, since the coil spring is housed in the cylinder, it is not easily affected by the temperature change of the outside air even when installed outdoors. Furthermore, each component is configured to be housed in a cylinder, and when mounting, it is only necessary to perform a simple work of fixing the cylinder by bringing the cylinder into contact with the temperature detection target, so that it is versatile. It can be used as a simple temperature detector. Further, the tubular body can be made compact by standardizing the shape and the dimension regardless of the shape and the dimension of the temperature detection object.
【0013】本発明の好ましい実施形態では、さらに、
前記ばね固定具に、前記コイルばねの中空部に挿通され
てこのコイルばねの径方向への移動を規制するガイド部
が設けられている。これにより、コイルばねは、収縮動
作を行う際に筒体の内面に強く接触するのが抑制されて
円滑に動作するとともに、コイルばねを筒体の内面に可
及的に近接させた配置とすることが可能となり、筒体の
内面からの輻射熱をコイルばねに効率的に受熱させるこ
とができる。筒体の内面とコイルばねの外周部との間隙
は0.5〜2.0mmとするのが好ましい。間隙が0.
5mm未満であれば、コイルばねが筒体の内面に強く接
触するおそれがあり、2.0mmを越えると、筒体の内
面からの輻射熱をコイルばねに効率的に受熱させ難くな
る。In a preferred embodiment of the invention,
The spring fixture is provided with a guide portion that is inserted into the hollow portion of the coil spring and restricts the radial movement of the coil spring. As a result, the coil spring is prevented from coming into strong contact with the inner surface of the tubular body during the contracting operation and operates smoothly, and the coil spring is arranged as close to the inner surface of the tubular body as possible. Thus, the radiant heat from the inner surface of the tubular body can be efficiently received by the coil spring. The gap between the inner surface of the cylindrical body and the outer peripheral portion of the coil spring is preferably 0.5 to 2.0 mm. The gap is 0.
If it is less than 5 mm, the coil spring may strongly contact the inner surface of the tubular body, and if it exceeds 2.0 mm, it becomes difficult for the coil spring to efficiently receive radiant heat from the inner surface of the tubular body.
【0014】本発明の他の好ましい実施形態では、さら
に、前記筒体の内面に固定され、前記可動部材が前記軸
心方向に移動自在に挿通されるとともに、前記バイアス
ばねの一端部を支持するバイアス支持体を備えている。
このバイアス支持体により、バイアスばねと可動部材と
が支持されて位置が安定するから、バイアスばねのばね
力を所要値に設定して、コイルばねが所定の温度範囲か
ら外れて形状保持力(ばね力)を消失したときに、バイ
アスばねのばね力によって可動部材を確実に移動させる
ことができる。In another preferred embodiment of the present invention, the movable member is further fixed to the inner surface of the cylindrical body, the movable member is movably inserted in the axial direction, and one end of the bias spring is supported. Equipped with a bias support.
Since the bias spring supports the bias spring and the movable member and stabilizes the position, the spring force of the bias spring is set to a required value so that the coil spring is out of the predetermined temperature range and the shape holding force (spring When the force is lost, the movable member can be reliably moved by the spring force of the bias spring.
【0015】本発明の他の好ましい実施形態では、さら
に、前記コイルばねを前記ばね固定具または前記可動部
材の少なくとも一方のねじ部に径方向外方から弾性力で
押し付けるばね押付具を備えている。これにより、コイ
ルばねがねじ部に対し密着されて接触面積が大きくな
り、ねじ部からコイルばねに熱伝導で効率的に熱が伝わ
るとともに、コイルばねが収縮動作するときにねじ部か
ら外れるのを確実に防止して、可動部材を円滑に移動さ
せることができる。In another preferred embodiment of the present invention, a spring pressing tool for pressing the coil spring against the threaded portion of at least one of the spring fixing tool and the movable member from the outside in the radial direction is further provided. . As a result, the coil spring is brought into close contact with the screw portion to increase the contact area, heat is efficiently transferred from the screw portion to the coil spring by heat conduction, and the coil spring is prevented from coming off from the screw portion when contracting. It is possible to reliably prevent the movable member from moving smoothly.
【0016】[0016]
【発明の実施の形態】以下、本発明の好ましい実施形態
について図面を参照しながら説明する。図1は本発明の
一実施形態に係る温度検出器TDを示す縦断面図であ
る。同図おいて、この温度検出器TDの外装ケースとな
る筒体1は、伝熱性、つまり高い熱伝導率を有する材料
であるアルミニウムによって円筒状に形成されており、
被温度検出体(図示せず)に対して外面を直接接触させ
た配置で固定して取り付けられ、被温度検出体から受熱
する。この筒体1の一端側(図の左端側)には、筒体1
と同様にアルミニウムで形成されたばね固定具2が嵌合
固定されている。このばね固定具2は、筒体1の内周面
に圧着する外周面を持つ胴部3と、この胴部3よりも小
さな径を有する外周面にねじ溝が形成されたねじ部4
と、このねじ部4よりもさらに小さな径を有する断面円
形の棒状に形成されたガイド部7とが一体形成されてい
る。Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view showing a temperature detector TD according to an embodiment of the present invention. In the figure, a cylindrical body 1 which is an outer case of the temperature detector TD is formed in a cylindrical shape by aluminum, which is a material having heat conductivity, that is, high thermal conductivity,
The outer surface of the temperature detection target (not shown) is fixedly attached in such a manner that its outer surface is in direct contact with the temperature detection target and receives heat from the temperature detection target. At the one end side (the left end side in the figure) of this tubular body 1, the tubular body 1
Similarly, a spring fixture 2 made of aluminum is fitted and fixed. The spring fixture 2 includes a body portion 3 having an outer peripheral surface to be crimped to the inner peripheral surface of the tubular body 1, and a screw portion 4 having a thread groove formed on the outer peripheral surface having a smaller diameter than the body portion 3.
And a guide portion 7 having a diameter smaller than that of the screw portion 4 and formed in a rod shape having a circular cross section.
【0017】形状記憶合金製のコイルばね8は、その一
端部(図の左端部)をばね固定具2のねじ部4に螺合し
て係止されているとともに、その一端部の外周部分を覆
う配置で取り付けられたばね押付具9の弾性力が径方向
外方から付与されていることにより、ねじ部4に押し付
けられて保持されている。すなわち、ばね押付具9は、
図2(a),(b)の正面図および右側面図に示すよう
に、矩形状の金属板をコイルばね8の外径よりも僅かに
小さい内径を有する弧状に湾曲してC字形状に形成され
たものである。また、図1の一部の拡大図である図4に
示すように、コイルばね8は、ねじ部4の断面台形のね
じ山4aの高さよりも僅かに大きな径を有してねじ山4
aから僅かに突出する状態でねじ溝4bに嵌め入れられ
ている。ばね押付具9は、拡径状態に僅かに弾性変形し
てコイルばね8に外嵌されることにより、変形による復
元力でコイルばね8のねじ山4aから突出した外周部に
圧接して、コイルばね8をねじ溝4bに対し離脱しない
よう押し付けている。The coil spring 8 made of a shape memory alloy has one end portion (the left end portion in the drawing) screwed into the threaded portion 4 of the spring fixture 2 to be locked, and the outer peripheral portion of the one end portion. Since the elastic force of the spring pressing tool 9 attached in the covering arrangement is applied from the outside in the radial direction, the spring pressing tool 9 is pressed against and held by the screw portion 4. That is, the spring pressing tool 9
As shown in the front view and the right side view of FIGS. 2A and 2B, a rectangular metal plate is curved in an arc shape having an inner diameter slightly smaller than the outer diameter of the coil spring 8 to have a C-shape. It was formed. Further, as shown in FIG. 4, which is an enlarged view of a part of FIG. 1, the coil spring 8 has a diameter slightly larger than the height of the screw thread 4 a having a trapezoidal cross section of the screw portion 4 and has a diameter larger than that of the screw thread 4.
It is fitted into the thread groove 4b in a state of slightly protruding from a. The spring pressing tool 9 is slightly elastically deformed to the expanded diameter state and externally fitted to the coil spring 8, so that the spring pressing tool 9 is pressed against the outer peripheral portion of the coil spring 8 protruding from the screw thread 4a by the restoring force due to the deformation, and The spring 8 is pressed against the thread groove 4b so as not to separate.
【0018】図1に示す筒体1の中央部よりも他端(図
1の右端)寄りの内周面にはバイアス支持体10が固定
されている。このバイアス支持体10は、図3(a),
(b)の正面図および右側面図に示すように、円形の一
部に切欠部10bが形成された側面形状を有する比較的
厚みの大きなリング状部材であって、筒体1の内径より
も僅かに大きな外径を有しており、中心孔10aを僅か
に縮径する状態に変形されて筒体1内に圧入されること
により、その変形による復元力で筒体1の内周面に圧着
して固定されている。A bias support 10 is fixed to the inner peripheral surface of the cylindrical body 1 shown in FIG. 1 closer to the other end (right end in FIG. 1) than the central portion. This bias support 10 is shown in FIG.
As shown in the front view and the right side view of (b), it is a ring-shaped member having a relatively large thickness and having a side surface shape in which a cutout portion 10b is formed in a part of a circular shape. It has a slightly large outer diameter, and is deformed into a state in which the central hole 10a is slightly reduced in diameter and press-fitted into the cylindrical body 1, so that the restoring force due to the deformation causes the inner peripheral surface of the cylindrical body 1 to move. It is fixed by crimping.
【0019】図1に示す筒体1の中央部から他端部(図
1の右端部)にかけて、可動部材11が筒体1内でその
軸心方向に移動自在に収納されている。この可動部材1
1は、バイアス支持体10の中心孔10aに摺動自在に
挿通されたシャフト部12と、このシャフト部12の一
端部(図1の左端部)に連設された保持用ねじ部13
と、シャフト部12の他端から突設された取付用ねじ部
14とが一体形成されている。保持用ねじ部13には、
コイルばね8の他端部が螺合して係止されているとも
に、コイルばね8の外周部分を覆う配置で取り付けられ
たばね押付具17の弾性力が、コイルばね8に対し径方
向外方から付与されていることにより、コイルばね8が
ねじ部4に押し付けられて離脱しないよう保持されてい
る。このばね押付具17の構造および作用は、ばね固定
具2のねじ部4側のばね押付具9と同一である。A movable member 11 is housed in the tubular body 1 movably in the axial direction from the center portion to the other end portion (right end portion in FIG. 1) of the tubular body 1 shown in FIG. This movable member 1
Reference numeral 1 denotes a shaft portion 12 slidably inserted into a center hole 10a of a bias support 10 and a holding screw portion 13 continuously provided at one end portion (left end portion in FIG. 1) of the shaft portion 12.
And a mounting screw portion 14 projecting from the other end of the shaft portion 12 are integrally formed. In the holding screw portion 13,
The other end of the coil spring 8 is screwed and locked, and the elastic force of the spring pressing tool 17 attached so as to cover the outer peripheral portion of the coil spring 8 is applied to the coil spring 8 from the outside in the radial direction. Since the coil spring 8 is applied, the coil spring 8 is pressed against the screw portion 4 and held so as not to be separated. The structure and operation of the spring pressing tool 17 are the same as those of the spring pressing tool 9 on the screw portion 4 side of the spring fixing tool 2.
【0020】可動部材11のシャフト部12の他端部に
は、円柱状の表示部18が、これの雌ねじ部18aに取
付用ねじ部14がワッシャ19を介在して螺合されるこ
とにより、連設されている。この表示部18の外面は、
この実施形態において赤色に着色されている。バイアス
支持体10と表示部18との間には、圧縮コイルばねか
らなるバイアスばね20が、シャフト部12に巻装して
介挿されている。At the other end of the shaft portion 12 of the movable member 11, a cylindrical display portion 18 is screwed into a female screw portion 18a of the display screw portion 18 with a washer 19 interposed therebetween. It is lined up. The outer surface of the display unit 18 is
In this embodiment, it is colored red. A bias spring 20 formed of a compression coil spring is wound around the shaft portion 12 and interposed between the bias support body 10 and the display portion 18.
【0021】前記コイルばね8の形状記憶温度(記憶形
状を発現する限界温度)は、例えば70°Cであり、こ
の実施形態では、70°C以上である所定の温度範囲に
おいて図1に図示の収縮状態の記憶形状を維持するとと
もに、所定の温度範囲外、例えば、ヒステリシスの影響
により60°C以下の温度になったときに、記憶形状を
維持するばね力(保持力)が消失して柔らかくなる。The shape memory temperature of the coil spring 8 (the limit temperature at which the memorized shape is exhibited) is, for example, 70 ° C. In this embodiment, it is shown in FIG. 1 in a predetermined temperature range of 70 ° C. or higher. In addition to maintaining the memorized shape in the contracted state, the spring force (holding force) for maintaining the memorized shape disappears and softens when the temperature falls outside a predetermined temperature range, for example, at a temperature of 60 ° C or less due to the influence of hysteresis. Become.
【0022】つぎに、前記温度検出器TDの作用につい
て説明する。この温度検出器TDは、例えば図5に示す
ように、スチームトラップ30が取り付けられている蒸
気配管31の外面に平行配置で接触させて、金属バンド
32で固定して取り付けられる。このとき、図1のコイ
ルばね8は、ほぼ常温であって、記憶形状を維持するば
ね力を消失しているため、可動部材11は、バイアスば
ね20のばね力を受けて図1の矢印A方向に移動され、
保持用ねじ部13がバイアス支持体10に当接した2点
鎖線で示す位置に位置決めされ、表示部18が2点鎖線
で示すように筒体1の外部に突出している。Next, the operation of the temperature detector TD will be described. For example, as shown in FIG. 5, the temperature detector TD is attached in parallel to the outer surface of the steam pipe 31 to which the steam trap 30 is attached and fixed by a metal band 32. At this time, the coil spring 8 in FIG. 1 is at approximately room temperature and the spring force for maintaining the memory shape has disappeared, so the movable member 11 receives the spring force of the bias spring 20 and is indicated by the arrow A in FIG. Moved in the direction,
The holding screw portion 13 is positioned at the position indicated by the chain double-dashed line in contact with the bias support 10, and the display portion 18 projects outside the cylinder 1 as indicated by the chain double-dashed line.
【0023】温度検出器TDが取り付けられたスチーム
トラップ30が正常に動作して配管31が一定温度以上
に保たれている場合には、配管31から筒体1、ばね固
定具2の胴部3およびねじ部4を介してコイルばね8に
熱伝導で熱が伝わるとともに、配管31の内周面からの
輻射熱がコイルばね8に伝達される。これにより、コイ
ルばね8は、70°C以上の温度まで上昇したときに、
収縮状態の記憶形状に復元するとともに、その収縮時に
生じる大きな形状保持力によって、バイアスばね20の
ばね力に抗し可動部材11を図1の図示位置まで引っ張
って移動させ、表示部18を筒体1内に完全に収容され
る位置まで引っ張り込む。そののち、スチームトラップ
30が正常動作を続けて配管31の温度が一定値以上に
維持され続けたときには、コイルばね8が収縮状態の記
憶形状を維持し続けるため、表示部18が筒体1内に収
容された状態に保持される。When the steam trap 30 to which the temperature detector TD is attached operates normally and the pipe 31 is kept at a certain temperature or higher, the pipe 31 to the barrel 1 and the body 3 of the spring fixture 2 are connected. The heat is transferred to the coil spring 8 via the screw portion 4 by heat conduction, and the radiant heat from the inner peripheral surface of the pipe 31 is transferred to the coil spring 8. As a result, when the coil spring 8 rises to a temperature of 70 ° C or higher,
The movable member 11 is moved to the position shown in FIG. 1 by pulling the movable member 11 against the spring force of the bias spring 20 due to the large shape-retaining force generated at the time of contraction while restoring the memorized shape of the contracted state. Pull it to the position where it is completely contained in 1. After that, when the steam trap 30 continues to operate normally and the temperature of the pipe 31 continues to be maintained above a certain value, the coil spring 8 continues to maintain the memorized shape of the contracted state. Is held in a state of being housed in.
【0024】図5のスチームトラップ30に機能低下ま
たは故障などの動作不良が生じた場合には、復水が溜ま
り過ぎて配管31の温度が一定値よりも低下する。この
配管31から受熱している図1のコイルばね8は、これ
の温度が60°C以下に低下したときに、記憶形状を維
持する保持力が消失して柔らかくなる。そのため、可動
部材11は、バイアスばね20のばね力によって保持用
ねじ部13がバイアス支持体10に当接する位置まで移
動されて、表示部18が筒体1から突出する。したがっ
て、作業者は、外周面が赤色に着色された表示部18が
筒体1から突出しているのを視認して、スチームトラッ
プ30が機能低下や故障などに起因して動作不良である
と一目瞭然に判断できる。When the steam trap 30 shown in FIG. 5 has a malfunction or malfunction such as a malfunction, the condensate water accumulates too much and the temperature of the pipe 31 falls below a certain value. When the temperature of the coil spring 8 in FIG. 1, which receives heat from the pipe 31, drops below 60 ° C., the holding force for maintaining the memory shape disappears and becomes soft. Therefore, the movable member 11 is moved by the spring force of the bias spring 20 to the position where the holding screw portion 13 contacts the bias support body 10, and the display portion 18 projects from the cylindrical body 1. Therefore, the operator visually recognizes that the display portion 18 whose outer peripheral surface is colored red protrudes from the cylinder body 1, and at a glance that the steam trap 30 is malfunctioning due to a functional deterioration or a failure. Can judge.
【0025】この温度検出器TDでは、配管31から受
熱する筒体1からコイルばね8までの伝熱経路における
筒体1と胴部3との接触面積およびねじ部4とコイルば
ね8との接触面積がいずれも大きく設定されている。す
なわち、ばね固定具2は、胴部3の十字状に形成された
溝部3aに治具を押し入れて胴部3を拡径した状態とし
たのち、この胴部3を筒体1内に圧入して取り付けられ
ることにより、胴部3の外周面全体が伝熱面として筒体
1の内周面に密着している。また、ねじ部4のねじ溝4
bに嵌入されたコイルばね8の一端部は、図4に示すよ
うに、ねじ部4のねじ山4aの頂面に対し0.1 mm程度
の突出幅pで径方向外方に突出して、この突出した外周
部がばね押付具9で径方向内方へ押圧されている。In this temperature detector TD, the contact area between the tubular body 1 and the body portion 3 and the contact between the screw portion 4 and the coil spring 8 in the heat transfer path from the tubular body 1 receiving the heat from the pipe 31 to the coil spring 8. All areas are set large. That is, in the spring fixture 2, the jig is pushed into the cross-shaped groove 3a of the body 3 to expand the body 3, and then the body 3 is press-fitted into the tubular body 1. The entire outer peripheral surface of the body portion 3 is in close contact with the inner peripheral surface of the cylindrical body 1 as a heat transfer surface by being attached. In addition, the thread groove 4 of the screw portion 4
As shown in FIG. 4, one end of the coil spring 8 fitted in b protrudes radially outward with a protrusion width p of about 0.1 mm with respect to the top surface of the screw thread 4a of the screw portion 4, and this protrusion The outer peripheral portion is pressed radially inward by the spring pressing tool 9.
【0026】したがって、筒体1と胴部3間およびねじ
部4とコイルばね8の一端部間は、いずれも比較的大き
な接触面積で接触して、高い伝熱性が確保されている。
さらに、コイルばね8は、その外周部と筒体1の内面と
の間隙cが0.5〜2mm程度に近接する配置で配設さ
れているため、筒体1の内周面からの輻射熱が効率良く
コイルばね8に伝わるとともに、輻射熱によって保温効
果が得られる。これにより、コイルばね8は、筒体1の
熱が効果的、かつ効率的に伝えられて、筒体1の温度に
対し正確に追従しながら温度変化する。しかも、コイル
ばね8は、筒体1内に収納されているので、屋外に設置
した場合にも外気の温度変化の影響を殆ど受けない。そ
のため、この温度検出器TDは、図5の配管31の温度
変化に基づくスチームトラップ30の動作不良を正確に
検出して表示することができる。また、コイルばね8
は、筒体1がコイルばね8の形状記憶温度に相当する温
度に達したときに、短時間で迅速に収縮状態の記憶形状
に復元する。Therefore, the cylindrical body 1 and the body portion 3, and the screw portion 4 and the one end portion of the coil spring 8 are in contact with each other with a relatively large contact area, and a high heat transfer property is secured.
Further, since the coil spring 8 is arranged such that the gap c between its outer peripheral portion and the inner surface of the cylindrical body 1 is close to about 0.5 to 2 mm, the radiant heat from the inner peripheral surface of the cylindrical body 1 is generated. The heat is efficiently transmitted to the coil spring 8 and a heat retaining effect is obtained by the radiant heat. As a result, the heat of the cylindrical body 1 is effectively and efficiently transmitted to the coil spring 8, and the temperature changes while accurately following the temperature of the cylindrical body 1. Moreover, since the coil spring 8 is housed in the tubular body 1, it is hardly affected by the temperature change of the outside air even when it is installed outdoors. Therefore, the temperature detector TD can accurately detect and display the malfunction of the steam trap 30 based on the temperature change of the pipe 31 of FIG. Also, the coil spring 8
When the cylindrical body 1 reaches a temperature corresponding to the shape memory temperature of the coil spring 8, it quickly restores the contracted state of the memory shape.
【0027】また、一般に、形状記憶合金製のコイルば
ね8は、その全体が常に均等に受熱されることが少ない
とともに、可動部材11との関係で伸縮動作が蛇行的な
複雑な動きを伴うものとなり易い。これに対し、前記温
度検出器TDでは、コイルばね8の中空部に挿通されて
いるばね固定具2のガイド部7が、コイルばね8を径方
向外方へ変位しないよう規制する。これにより、コイル
ばね8は、不均等な受熱によって部分的な温度むらが生
じても、筒体1の長手方向に沿って円滑に伸縮動作を行
う。さらに、コイルばね8の伸縮動作の際の径方向外方
への変位がガイド部7で抑制されるから、上述したコイ
ルばね8を筒体1の内面に対し小さな間隙cに近接させ
た配置とするのが容易になる。ガイド部7がない場合、
コイルばね8が伸縮動作の際に蛇行して筒体1の内面に
接触し、その接触時の摩擦で動作不良が生じ易くなる。
なお、ガイド部7は、コイルばね8が収縮したときに移
動する可動部材11の保持用ねじ部13が当接しない位
置まで延出した長さとすることができる。Further, in general, the coil spring 8 made of a shape memory alloy is less likely to receive heat evenly in its entirety at all times, and the expansion and contraction operation involves a meandering and complicated movement in relation to the movable member 11. It is easy to become. On the other hand, in the temperature detector TD, the guide portion 7 of the spring fixture 2 inserted in the hollow portion of the coil spring 8 regulates the coil spring 8 so as not to be displaced radially outward. As a result, the coil spring 8 smoothly expands and contracts along the longitudinal direction of the tubular body 1 even if partial temperature unevenness occurs due to uneven heat reception. Further, since the guide portion 7 suppresses the outward displacement in the radial direction during the expansion / contraction operation of the coil spring 8, the above-described coil spring 8 is placed close to the inner surface of the cylindrical body 1 in a small gap c. Easy to do. If there is no guide part 7,
When the coil spring 8 expands and contracts, the coil spring 8 meanders and comes into contact with the inner surface of the tubular body 1, and the friction during the contact easily causes a malfunction.
The guide portion 7 may have a length extending to a position where the holding screw portion 13 of the movable member 11 that moves when the coil spring 8 contracts does not come into contact.
【0028】さらに、前記温度検出器TDでは、各構成
部材が筒体1内に収納された構成になっているととも
に、取り付けに際して、筒体1を蒸気配管のような被温
度検出体に接触させて固定するだけでよいから、被温度
検出体の形状や寸法に拘わらず筒体1の径および長さを
画一化したコンパクトなものにすることができるととも
に、汎用的な温度検出器として利用することができる。Further, in the temperature detector TD, each constituent member is housed in the cylinder 1, and the cylinder 1 is brought into contact with a temperature detection object such as a steam pipe at the time of mounting. Since it is only necessary to fix it, it is possible to make the diameter and length of the cylindrical body 1 uniform regardless of the shape and size of the temperature detection target, and to use it as a general-purpose temperature detector. can do.
【0029】なお、前記実施形態では、筒体1およびば
ね固定具2を、熱伝導率の高い材料であるアルミニウム
で形成した場合について説明したが、熱伝導率の高い他
の金属、例えば銅で形成してもよい。また、ばね固定具
2は、アルミニウムや銅に比較して熱伝導率が若干低い
真鍮を用いて形成しても、上述と同様の効果を得ること
ができる。さらに、前記実施形態では、筒体1は一体物
になっているが、例えば、筒体1におけるばね固定具2
および形状記憶状態(この例では収縮状態)のコイルば
ね8の外周に対向する部分、つまりこの実施形態では、
ばね固定具2の取付部(筒体1の左端部)からコイルば
ね8の収縮状態における可動部材11の保持用ねじ部1
3の配置位置までに対応する部分を、熱伝導率の高い材
料で構成し、その他の部分を耐熱性樹脂などの熱伝導率
の低い材料で構成し、それら2部分を接合して筒体を形
成してもよく、その場合には、筒体1からの放熱を抑制
できる効果が得られる。さらにまた、この温度検出器T
Dの被温度検出体への取付手段は、実施形態の金属バン
ド32に限らず、被温度検出体の形状などに対応して、
板状ばね、磁石付きの止め具、または耐熱性接着剤など
を用いることができる。In the above embodiment, the case where the cylindrical body 1 and the spring fixture 2 are made of aluminum, which is a material having a high thermal conductivity, has been described. However, another metal having a high thermal conductivity, such as copper, is used. You may form. Further, even if the spring fixture 2 is formed by using brass whose thermal conductivity is slightly lower than that of aluminum or copper, the same effect as described above can be obtained. Furthermore, in the above-described embodiment, the tubular body 1 is an integral body, but for example, the spring fixture 2 in the tubular body 1 is used.
And a portion facing the outer periphery of the coil spring 8 in the shape memory state (contracted state in this example), that is, in this embodiment,
The screw portion 1 for holding the movable member 11 in the contracted state of the coil spring 8 from the mounting portion of the spring fixture 2 (the left end portion of the tubular body 1).
The part corresponding to the arrangement position of 3 is made of a material having a high thermal conductivity, the other part is made of a material having a low thermal conductivity such as heat resistant resin, and the two parts are joined to form a cylindrical body. It may be formed, and in that case, the effect of suppressing the heat radiation from the cylindrical body 1 is obtained. Furthermore, this temperature detector T
The means for attaching D to the temperature-detected body is not limited to the metal band 32 of the embodiment, but may be formed according to the shape of the temperature-detected body.
A leaf spring, a stopper with a magnet, or a heat resistant adhesive can be used.
【0030】また、前記実施形態では、コイルばね8が
形状記憶温度以下になったときに表示部18を筒体1か
ら突出させてスチームトラップ30の動作不良を表示す
る場合を例示しているが、形状記憶合金製のコイルばね
8として、形状記憶温度以上の高温となったときに伸長
状態の記憶形状となるタイプのものを用いて、形状記憶
温度以上であるときに、コイルばね8が、引っ張りばね
からなるバイアスばね20のばね力に抗して表示部18
を突出させて、スチームトラップ30が正常動作である
ことを表示するようにしてもよい。その場合には、表示
部18の外周面を青色に着色表示することが好ましく、
その青色表示の視認によってスチームトラップ30が正
常動作であることを確認できる。Further, in the above-mentioned embodiment, the case where the display portion 18 is projected from the cylindrical body 1 to indicate the malfunction of the steam trap 30 when the coil spring 8 becomes below the shape memory temperature is exemplified. As the coil spring 8 made of a shape memory alloy, a coil spring 8 of a type that has a memory shape in an expanded state when the temperature becomes higher than the shape memory temperature is used. The display unit 18 is resisted against the spring force of the bias spring 20 composed of a tension spring.
May be projected to indicate that the steam trap 30 is operating normally. In that case, it is preferable that the outer peripheral surface of the display unit 18 is colored and displayed in blue.
By visually recognizing the blue display, it can be confirmed that the steam trap 30 is operating normally.
【0031】[0031]
【発明の効果】以上のように、本発明に係る温度検出器
によれば、被温度検出体の熱がコイルばねに対し効率的
に伝わるとともに、コイルばねが筒体の内壁からの輻射
熱によっても受熱するので、コイルばねは、被温度検出
体の温度に追従して正確、且つ迅速に反応して形状変化
する。また、コイルばねは、筒体内に収納されているの
で、屋外に設置した場合にも外気の温度変化の影響を殆
ど受けない。さらに、各構成部材は筒体内に収納された
構成になっているとともに、取り付けに際しては、筒体
を被温度検出体に接触させて固定するだけの簡単な作業
を行うだけでよく、また、筒体は、被温度検出体の形状
や寸法に拘わらず形状および寸法を画一化してコンパク
トなものにできるとともに、汎用的な温度検出器として
利用することができる。As described above, according to the temperature detector of the present invention, the heat of the temperature detection object is efficiently transmitted to the coil spring, and the coil spring is also affected by the radiant heat from the inner wall of the cylindrical body. Since the coil spring receives the heat, the coil spring follows the temperature of the temperature-detected body, and reacts accurately and quickly to change its shape. Further, since the coil spring is housed in the cylinder, it is hardly affected by the temperature change of the outside air even when it is installed outdoors. Further, each component is configured to be housed in the cylinder, and when mounting, it is only necessary to perform a simple work of fixing the cylinder by bringing the cylinder into contact with the temperature detection target. The body can be made compact by standardizing the shape and dimensions regardless of the shape and dimensions of the temperature detection object, and can be used as a general-purpose temperature detector.
【図1】本発明の一実施形態に係る温度検出器を示す縦
断面図である。FIG. 1 is a vertical sectional view showing a temperature detector according to an embodiment of the present invention.
【図2】(a),(b)はそれぞれ同上の温度検出器に
おけるばね押付具を示す正面図および右側面図である。2 (a) and 2 (b) are respectively a front view and a right side view showing a spring pressing tool in the temperature detector of the above.
【図3】(a),(b)はそれぞれ同上の温度検出器に
おけるバイアス支持体を示す正面図および右側面図であ
る。3 (a) and 3 (b) are respectively a front view and a right side view showing a bias support in the temperature detector of the above.
【図4】図1の一部の拡大図である。FIG. 4 is an enlarged view of a part of FIG.
【図5】同上の温度検出器の取付状態を示す正面図であ
る。FIG. 5 is a front view showing a mounting state of the above temperature detector.
1…筒体、2…ばね固定具、3…胴部、4…ばね固定具
のねじ部、7…ガイド部、8…コイルばね、9,17…
ばね押付具、10…バイアス支持体、11…可動部材、
13…保持用ねじ部(可動部材のねじ部)、18…表示
部、20…バイアスばね、31…蒸気配管(被温度検出
体)、TD…温度検出器。DESCRIPTION OF SYMBOLS 1 ... Cylindrical body, 2 ... Spring fixing tool, 3 ... Body part, 4 ... Spring fixing tool screw part, 7 ... Guide part, 8 ... Coil spring, 9, 17 ...
Spring pressing tool, 10 ... bias support, 11 ... movable member,
13 ... Retaining screw part (screw part of movable member), 18 ... Display part, 20 ... Bias spring, 31 ... Steam pipe (temperature detection object), TD ... Temperature detector.
Claims (5)
と、 前記筒体内に収納されて所定の温度範囲で記憶形状を保
持する形状記憶合金製のコイルばねと、 前記筒体の内面に接触して固定される外周面を持つ胴部
と前記コイルばねの一端部に螺合してこの一端部を保持
するねじ部とを有する伝熱性のばね固定具と、 前記コイルばねの他端部に螺合してこの他端部を保持す
るねじ部を一端部に有し、前記筒体内でその軸心方向に
移動可能に配置された可動部材と、 前記可動部材の他端部に取り付けられて前記筒体に対し
て外方に突出または内方に没入することによって表示を
行う表示部と、 前記コイルばねの記憶された形状の保持力によって前記
可動部材が受けるばね力と反対方向のばね力を前記可動
部材に付加するバイアスばねとを備え、 前記筒体は、少なくとも前記ばね固定具および形状記憶
状態のコイルばねの外周に対向する部分が伝熱性の材料
で形成されている温度検出器。1. A cylindrical body that comes into contact with a temperature-detecting body to receive heat, a coil spring made of a shape memory alloy that is housed in the cylindrical body and holds a memory shape within a predetermined temperature range, and an inner surface of the cylindrical body. A heat-conducting spring fixture having a body portion having an outer peripheral surface that is fixed by contacting with the screw and a screw portion that is screwed into one end portion of the coil spring and holds the one end portion, and the other end of the coil spring. A movable member disposed at one end thereof so as to be screwed into the end portion and holding the other end thereof, the movable member being movably arranged in the axial direction of the tubular body, and attached to the other end portion of the movable member. And a display unit for displaying by protruding outward or immersing inward with respect to the cylindrical body, and a spring force applied to the movable member in a direction opposite to the spring force received by the holding force of the stored shape of the coil spring. A bias spring for applying a spring force to the movable member, A temperature detector in which at least a portion of the cylindrical body facing the outer circumference of the spring fixture and the coil spring in a shape memory state is formed of a heat conductive material.
定具に、前記コイルばねの中空部に挿通されてこのコイ
ルばねの径方向への移動を規制するガイド部が設けられ
ている温度検出器。2. The temperature detector according to claim 1, further comprising a guide portion, which is inserted into the hollow portion of the coil spring and restricts radial movement of the coil spring, in the spring fixture. .
記筒体の内面と前記バイアスばねの外周部との間隙が
0.5〜2.0mmに設定されている温度検出器。3. The temperature detector according to claim 1, wherein the gap between the inner surface of the cylindrical body and the outer peripheral portion of the bias spring is set to 0.5 to 2.0 mm.
に、前記筒体の内面に固定され、前記可動部材が前記軸
心方向に移動自在に挿通されるとともに、前記バイアス
ばねの一端部を支持するバイアス支持体を備えた温度検
出器。4. The bias member according to claim 1, wherein the movable member is fixed to an inner surface of the cylindrical body, the movable member is movably inserted in the axial direction, and one end of the bias spring is supported. Temperature detector with a biasing support.
らに、前記コイルばねを前記ばね固定具または前記可動
部材の少なくとも一方のねじ部に径方向外方から弾性力
で押し付けるばね押付具を備えた温度検出器。5. The spring pressing device according to claim 1, further comprising a spring pressing device that presses the coil spring against a screw portion of at least one of the spring fixing device and the movable member from outside in a radial direction with elastic force. Temperature detector.
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JP2001234477A JP4547112B2 (en) | 2001-08-02 | 2001-08-02 | Temperature detector |
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JP2001234477A JP4547112B2 (en) | 2001-08-02 | 2001-08-02 | Temperature detector |
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JP4547112B2 JP4547112B2 (en) | 2010-09-22 |
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JP2001234477A Expired - Lifetime JP4547112B2 (en) | 2001-08-02 | 2001-08-02 | Temperature detector |
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Cited By (10)
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JP2005227149A (en) * | 2004-02-13 | 2005-08-25 | Tlv Co Ltd | Temperature indicator |
JP2005300458A (en) * | 2004-04-15 | 2005-10-27 | Tlv Co Ltd | Temperature indicator |
JP2006084247A (en) * | 2004-09-15 | 2006-03-30 | Tlv Co Ltd | Temperature indicator |
JP2006194365A (en) * | 2005-01-14 | 2006-07-27 | Tlv Co Ltd | Temperature indicator |
JP2006194366A (en) * | 2005-01-14 | 2006-07-27 | Tlv Co Ltd | Temperature indicator |
JP2007218686A (en) * | 2006-02-15 | 2007-08-30 | Tlv Co Ltd | Temperature indicator |
JP2007248263A (en) * | 2006-03-16 | 2007-09-27 | Tlv Co Ltd | Temperature indicator |
JP2007248262A (en) * | 2006-03-16 | 2007-09-27 | Tlv Co Ltd | Temperature indicator |
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Cited By (16)
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JP2005227149A (en) * | 2004-02-13 | 2005-08-25 | Tlv Co Ltd | Temperature indicator |
JP4563068B2 (en) * | 2004-04-15 | 2010-10-13 | 株式会社テイエルブイ | Temperature indicator |
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JP2006084247A (en) * | 2004-09-15 | 2006-03-30 | Tlv Co Ltd | Temperature indicator |
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JP2006194366A (en) * | 2005-01-14 | 2006-07-27 | Tlv Co Ltd | Temperature indicator |
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JP2007218686A (en) * | 2006-02-15 | 2007-08-30 | Tlv Co Ltd | Temperature indicator |
JP2007248263A (en) * | 2006-03-16 | 2007-09-27 | Tlv Co Ltd | Temperature indicator |
JP2007248262A (en) * | 2006-03-16 | 2007-09-27 | Tlv Co Ltd | Temperature indicator |
CN109659635A (en) * | 2019-01-21 | 2019-04-19 | 安徽安凯汽车股份有限公司 | A kind of temperature indicating device |
CN109659635B (en) * | 2019-01-21 | 2023-11-03 | 安徽安凯汽车股份有限公司 | Temperature display device |
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