WO2023286277A1 - Chain extension detection device - Google Patents

Chain extension detection device Download PDF

Info

Publication number
WO2023286277A1
WO2023286277A1 PCT/JP2021/026840 JP2021026840W WO2023286277A1 WO 2023286277 A1 WO2023286277 A1 WO 2023286277A1 JP 2021026840 W JP2021026840 W JP 2021026840W WO 2023286277 A1 WO2023286277 A1 WO 2023286277A1
Authority
WO
WIPO (PCT)
Prior art keywords
chain
pair
elongation
levers
detection device
Prior art date
Application number
PCT/JP2021/026840
Other languages
French (fr)
Japanese (ja)
Inventor
豊 橋丘
和利 赤澤
龍 奥田
Original Assignee
三菱電機株式会社
三菱電機ビルソリューションズ株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社, 三菱電機ビルソリューションズ株式会社 filed Critical 三菱電機株式会社
Priority to CN202180100459.7A priority Critical patent/CN117795283A/en
Priority to JP2023534572A priority patent/JPWO2023286277A1/ja
Priority to PCT/JP2021/026840 priority patent/WO2023286277A1/en
Publication of WO2023286277A1 publication Critical patent/WO2023286277A1/en

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
    • G01B21/06—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness specially adapted for measuring length or width of objects while moving
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness

Definitions

  • the present disclosure relates to a chain elongation detection device.
  • Patent Document 1 discloses a technique for measuring chain elongation.
  • Patent Document 1 can obtain information on elongation of a plurality of links of a chain, but cannot obtain information on elongation in units of one link.
  • An object of the present disclosure is to obtain a chain elongation detection device capable of detecting chain elongation in units of one link.
  • the chain elongation detection device includes a pair of rotating shafts installed so that the straight line connecting the shaft centers is parallel to the running direction of the target chain, and a pair of rotating shafts that are freely rotatable around these rotating shafts. and a pair of attached levers.
  • the dimension between a pair of rotating shafts is set to the same dimension as the chain pitch of the chain.
  • the pair of levers has a pair of ends capable of contacting the side surfaces of adjacent outer links or the side surfaces of adjacent inner links of the chain, and the pair of ends are in contact with the respective chains. formed to be the same.
  • At least one end of the pair of levers on the side opposite to the side in contact with the chain is provided with a change in the relative distance between the pair of ends of the pair of levers on the side in contact with the chain.
  • a structure is provided in which the state is mechanically changed by Alternatively, at least one of the ends of the pair of levers opposite to the side contacting the chain detects information about the relative distance between the ends of the pair of levers contacting the chain.
  • a detector is provided that electrically outputs as
  • FIG. 1 is a perspective view showing a general structure of a chain used for power transmission;
  • FIG. 1 is a perspective view showing the structure of a chain elongation detection device according to Embodiment 1;
  • FIG. 1 is a perspective view showing the structure of a chain elongation detection device according to Embodiment 1;
  • FIG. 4 is a perspective view showing the periphery of the detection component in Embodiment 1.
  • FIG. FIG. 2 is a front view showing a state in which the chain is running without elongation in the chain elongation detection device according to Embodiment 1;
  • FIG. 4 is a front view showing a state in which an elongated chain is running in the chain elongation detection device according to Embodiment 1;
  • FIG. 7 is a front view showing a state in which the chain has traveled further from FIG. 6;
  • FIG. 10 is a perspective view showing a modification of the detection component according to Embodiment 1;
  • FIG. 4 is a front view showing a modification of the detection component in Embodiment 1;
  • FIG. 10 is a diagram showing a chain elongation detection device according to Embodiment 2;
  • FIG. 10 is a diagram showing a first modification of the chain elongation detection device according to Embodiment 2;
  • FIG. 10 is a diagram showing a second modification of the chain elongation detection device according to Embodiment 2;
  • FIG. 1 is a perspective view showing a general structure of a chain 1 used for power transmission.
  • the chain 1 is a member constituting a power transmission structure that transmits power by tension of the chain 1 wound around a pair of sprockets.
  • the chain 1 is composed of outer links 11 and inner links 12 that are alternately connected.
  • the outer link 11 is a member in which a link plate and a pin 13 are integrated.
  • the inner link 12 is a member in which a link plate and a bush 14 are integrated.
  • the pin 13 penetrates the bush 14 and rotates and slides.
  • a chain roller 15 is attached to the outside of the bush 14 .
  • a chain roller 15 meshes with a pair of sprocket teeth for transmitting power.
  • the elongation of the chain 1 is mainly caused by wear due to rotational sliding between the pin 13 and the bush 14.
  • the elongation of the chain 1 widens the distance between adjacent outer links 11 or between adjacent inner links 12 .
  • the dimension between the links of the chain 1 is called "chain pitch", and this chain pitch is defined by standards according to the size of the chain 1.
  • the elongation of the chain 1 is represented by the elongation rate (%) from the chain pitch.
  • the chain elongation detection device directly and mechanically detects dimensional changes in the spacing between adjacent links by contact with the links.
  • 2 and 3 are perspective views showing the structure of the chain elongation detection device according to Embodiment 1.
  • FIG. 1 is a perspective view showing the structure of the chain elongation detection device according to Embodiment 1.
  • a chain elongation detection device includes a base 4 .
  • a pair of levers are attached to the base 4 .
  • the pair of levers are a left lever 2 and a right lever 3, respectively.
  • a chain guide 5 is attached to the base 4 for sandwiching the chain 1 whose elongation is to be detected and fixing the chain elongation detection device to the chain 1 .
  • the chain elongation detection device has a pair of rotating shafts provided on the base 4 .
  • the pair of rotation axes are the rotation axis P2 and the rotation axis P3, respectively.
  • the pair of rotating shafts are installed such that a straight line connecting the centers of the shafts is parallel to the running direction of the target chain 1 .
  • the dimension between the pair of rotating shafts is set to the same dimension as the chain pitch of the chain 1 .
  • the rotating shaft P2 is an example of a first rotating shaft according to the present disclosure.
  • the rotating shaft P3 is an example of a second rotating shaft according to the present disclosure.
  • the left lever 2 is freely rotatable around the rotation axis P2.
  • the right lever 3 is rotatably mounted around a rotation axis P3.
  • the left lever 2 is an example of a first lever according to the present disclosure.
  • the right lever 3 is an example of a second lever according to the present disclosure.
  • a pair of levers has ends that can contact the side surfaces of the adjacent outer links 11 or the adjacent inner links 12 of the chain 1 .
  • the pair of ends are formed so that they are in the same contact state with the chain 1 .
  • the length of the portion from the end of the left lever 2 on the chain 1 side to the rotation axis P2 is set to be the same as the length of the portion from the end of the right lever 3 on the chain 1 side to the rotation axis P3. be done.
  • the shapes of the ends of the left lever 2 and the right lever 3 on the chain 1 side are designed so that they are in the same contact state with the link side surface of the chain 1 in the same rotational posture.
  • the chain 1 runs toward the right side of the paper.
  • the left lever 2 is applied with a clockwise rotational force about the rotational axis P2 by means of a spring 6 or the like.
  • the right lever 3 is applied with a clockwise rotational force about the rotational axis P3 by means of a spring 6 or the like.
  • the left lever 2 and the right lever 3 are each maintained in their initial postures by stoppers 7 fixed to the base 4 .
  • the left lever 2 and the right lever 3 are in a vertical posture with respect to the running direction of the chain 1.
  • the ends of the left lever 2 and the right lever 3 on the chain 1 side are not in contact with the link side surfaces of the chain 1 .
  • the left lever 2 and the right lever 3 are in an initial posture pressed against the stopper 7 by means such as a spring 6 that imparts a rotational force.
  • the end of at least one of the pair of levers opposite to the side contacting the chain 1 has a relative spacing between the pair of ends of the pair of levers contacting the chain 1 .
  • a structure is provided that mechanically changes state in response to a change in .
  • a member having a hole penetrating in the tangential direction of the rotation of the lever is attached to the tip of the left lever 2 .
  • a detection part 8 that can be inserted into this hole and slidable is installed at the tip of the left lever 2 .
  • FIG. 4 is a perspective view showing the periphery of the detection component 8 according to Embodiment 1.
  • the left lever 2 and the right lever 3 are in an initial posture in which they are pressed against the stopper 7 by means such as a spring 6 that imparts a rotational force, as in FIG.
  • the detection part 8 and the tip of the right lever 3 are in contact with each other or separated by a certain distance at the ends of the levers opposite to the chain 1 .
  • the end of the detection component 8 opposite to the right lever 3 does not protrude from the through hole at the tip of the left lever 2 .
  • FIG. 5 is a front view showing the state of the chain 1 running without elongation in the chain elongation detection device according to Embodiment 1.
  • FIG. FIG. 5 shows a state in which the chain 1 has moved to the right side of the drawing from the state shown in FIG.
  • the pair of rotating shafts are installed such that the straight line connecting the shaft centers is parallel to the running direction of the chain 1 .
  • the dimension between the rotating shafts is set to the same dimension as the chain pitch of the chain 1 .
  • the distances from the chain 1 side ends of both levers to the rotation shaft are the same.
  • the shape of the portions of both levers that come into contact with the chain 1 is also the same.
  • FIG. 6 is a front view showing a state in which the chain 1 with elongation is running in the chain elongation detection device according to the first embodiment.
  • FIG. 7 is a front view showing a state in which the chain 1 has traveled further from FIG.
  • the interval between the adjacent links A and B is the chain pitch p defined by the chain size.
  • the left lever 2 and the right lever 3 are in contact with the links adjacent to each other at the chain pitch p, in a state where the chain 1 is not stretched.
  • the distance between the link A and the link B is expressed by the following formula (1). (1+ ⁇ /100) ⁇ p (1)
  • the interval between link A and link B is larger than chain pitch p.
  • the distance between link A and link B is specifically a dimension of (1+ ⁇ /100) ⁇ p.
  • link A passes through left lever 2 and contacts the right lever.
  • the distance at which the tip of the right lever 3 approaches the tip of the left lever 2 for an assumed chain elongation rate can be obtained in advance.
  • L1 be the distance from the end of the right lever 3 on the chain 1 side to the rotation axis P3.
  • L2 be the distance from the end of the right lever 3 opposite to the chain 1 side to the rotation axis P3.
  • ⁇ (%) be the elongation rate of the chain 1 .
  • the amount of movement of the chain 1 from when the right lever 3 contacts the link A and starts rotating until the left lever 2 contacts the link B and starts rotating is the elongation rate ⁇ (%).
  • This amount of movement can be represented by p ⁇ /100.
  • the amount by which the end of the right lever 3 on the opposite side of the chain 1 approaches the left lever 2 can be obtained by the following equation (2). (p ⁇ /100) ⁇ (L2/L1) (2)
  • the end of the detection part 8 opposite to the right lever 3 does not protrude from the through hole at the tip of the left lever 2 in the initial posture shown in FIG.
  • the detection part 8 is pushed into the through hole.
  • the pushing amount until the detection part 8 jumps out of the through hole of the left lever 2 is set smaller than the amount obtained by the formula (2), as shown in FIG. From the outside, it is possible to easily visually confirm that the chain 1 is stretched at the elongation rate ⁇ (%) or more.
  • a detection part 8 for indicating the presence or absence of elongation to be detected and a through hole for sliding the detection part 8 are provided at the tip of the left lever 2 .
  • a through-hole for sliding between the detection component 8 and the detection component 8 may be provided at the tip of the right lever 3 .
  • the mechanical structure provided at the tip of each lever may be a structure composed of arbitrary mechanical elements different from the detection part 8 .
  • the structure is not limited to one showing elongation at a specific elongation rate or higher, and may be a structure that simply indicates the presence or absence of elongation.
  • the chain elongation detection device is capable of investigating whether or not elongation of the chain 1 equal to or greater than the target elongation rate occurs over the entire area of the chain 1 on a link-by-link basis. is obtained. Further, in the present embodiment, a means for informing the outside of the presence or absence of elongation of the chain 1 by means of a mechanical change is used. According to this embodiment, it is possible to obtain a chain elongation detection device that does not require electrical wiring and is advantageous in terms of installation and workability.
  • FIG. 8 is a perspective view showing a modification of the detection component 8 in the first embodiment.
  • FIG. 9 is a front view showing a modification of the detection component 8 according to Embodiment 1.
  • the detection part 8 is configured to make it possible to visually confirm from the outside that the chain 1 has stretched at a plurality of specific elongation rates or more by means of mechanical changes.
  • the detection part 8 is coated with different colors depending on the distance from the tip, starting from the tip on the side opposite to the side in contact with the right lever 3 .
  • FIG. 9(a) shows a state where the elongation is zero.
  • FIG. 9(b) shows a state where the elongation rate is ⁇ 1.
  • FIG. 9(c) shows a state where the elongation rate is ⁇ 2.
  • the elongation ratio relationship is zero ⁇ 1 ⁇ 2.
  • the maximum elongation rate of the chain 1 can be visually confirmed from the outside by distinguishing the color of the portion where the detection part 8 protrudes from the through hole.
  • Embodiment 2 Next, a chain elongation detection device according to Embodiment 2 will be described. Illustrations and descriptions of portions that are the same as or correspond to those of the first embodiment are omitted. In this embodiment, differences from the first embodiment will be described.
  • FIG. 10 is a diagram showing a chain elongation detection device according to Embodiment 2.
  • FIG. 10 at least one end of the pair of levers opposite to the side in contact with the chain 1 is provided with a relative A detector is provided for detecting and electrically outputting the information of the interval.
  • the tip of the left lever 2 is provided with a limit switch 9 that turns ON/OFF by detecting a certain pushing amount from the tip of the right lever 3 .
  • Limit switch 9 is an example of a detector according to the present disclosure.
  • the limit switch 9 has the same function as the detection component 8 in the first embodiment.
  • the limit switch 9 operates depending on whether or not the chain 1 has been stretched to a specific elongation rate or more.
  • the limit switch 9 is pushed in by the right lever 3 when the chain 1 is stretched beyond a specific elongation rate. As a result, the limit switch 9 is turned ON.
  • a signal from the limit switch 9 is output to a separately provided signal processing section 10 .
  • the signal processing unit 10 notifies the outside that the limit switch 9 has been turned on by any method such as voice, screen display, light, or the like. As a result, it is possible to easily confirm that the chain 1 is stretched at a specific elongation rate or more.
  • the signal processing unit 10 may be incorporated in the chain elongation detection device, or may be configured as an external device.
  • FIG. 11 is a diagram showing a first modification of the chain elongation detection device according to the second embodiment.
  • an externally visible LED may be provided. This LED is configured to light up when the limit switch 9 is turned on.
  • information about elongation of the chain 1 is output to the outside, so there is no need to open the vicinity of the chain 1 or visually check the chain 1 itself.
  • FIG. 12 is a diagram showing a second modification of the chain elongation detection device according to the second embodiment.
  • a displacement sensor 20 may be provided at the tip of the left lever 2 as displacement detection means for detecting the relative distance between opposing objects.
  • the displacement sensor 20 is capable of non-contact measurement using optical or magnetic means.
  • the displacement sensor 20 electrically outputs information on the amount of approach between the tip of the left lever 2 and the tip of the right lever 3 .
  • Information output from the displacement sensor 20 is processed by the signal processing unit 10, for example.
  • This modified example also makes it possible to easily detect the elongation of the chain 1 in units of one link.
  • a chain elongation detection device is used, for example, to detect elongation of a chain that constitutes a power transmission mechanism.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

A chain extension detection device according to this disclosure comprises a pair of rotary shafts that are provided such that a straight line joining the shaft centers thereof is parallel to the travel direction of a given chain (1) and a pair of levers that are attached so as to be capable of rotating freely around the rotary shafts. The distance between the pair of rotary shafts is set to the same distance as the chain pitch of the chain (1). The pair of levers have a pair of end parts that are capable of touching the lateral surfaces of adjacent outer links of the chain (1) or the lateral surfaces of adjacent inner links of the chain (1). The pair of end parts are formed so as to touch the chain (1) in the same way. At least one of the pair of levers has a structure provided at an end part on the reverse side from the side that touches the chain (1), and the state of the structure changes mechanically in response to variation in the relative interval between the pair of end parts of the pair of levers on the sides that touch the chain (1).

Description

チェーン伸び検知装置Chain elongation detector
　本開示は、チェーン伸び検知装置に関するものである。 The present disclosure relates to a chain elongation detection device.
　特許文献１に、チェーンの伸びを測定する技術が開示されている。 Patent Document 1 discloses a technique for measuring chain elongation.
日本特許第３３１２３２６号公報Japanese Patent No. 3312326
　特許文献１に記載の技術は、チェーンの複数のリンクの伸びの情報を得ることはできるが、１リンク単位での伸びの情報を得ることができない。 The technique described in Patent Document 1 can obtain information on elongation of a plurality of links of a chain, but cannot obtain information on elongation in units of one link.
　本開示は、上記のような課題を解決するためのものである。本開示の目的は、１リンク単位でのチェーンの伸びを検知可能なチェーン伸び検知装置を得ることである。 The present disclosure is intended to solve the above problems. An object of the present disclosure is to obtain a chain elongation detection device capable of detecting chain elongation in units of one link.
　本開示に係るチェーン伸び検知装置は、軸中心を結ぶ直線が対象となるチェーンの走行方向と平行となるように設置された１対の回転軸と、これらの回転軸を回転中心として回転自由に取り付けられた１対のレバーと、を備える。１対の回転軸同士の間の寸法は、チェーンのチェーンピッチと同じ寸法に設定される。１対のレバーは、チェーンの隣接する外リンクの側面あるいは隣接する内リンクの側面に接触可能な１対の端部を有し、当該１対の端部は、それぞれのチェーンへの接触状態が同じになるように形成される。
　そして、１対のレバーの少なくとも一方のチェーンと接触する側と反対側の端部には、１対のレバーのチェーンと接触する側の１対の端部同士の相対的な間隔の変化に応じて状態が機械的に変化する構造が設けられている。
　あるいは、１対のレバーの少なくとも一方のチェーンと接触する側と反対側の端部には、１対のレバーのチェーンと接触する側の１対の端部同士の相対的な間隔の情報を検出して電気的に出力する検出器が設けられている。 The chain elongation detection device according to the present disclosure includes a pair of rotating shafts installed so that the straight line connecting the shaft centers is parallel to the running direction of the target chain, and a pair of rotating shafts that are freely rotatable around these rotating shafts. and a pair of attached levers. The dimension between a pair of rotating shafts is set to the same dimension as the chain pitch of the chain. The pair of levers has a pair of ends capable of contacting the side surfaces of adjacent outer links or the side surfaces of adjacent inner links of the chain, and the pair of ends are in contact with the respective chains. formed to be the same.
At least one end of the pair of levers on the side opposite to the side in contact with the chain is provided with a change in the relative distance between the pair of ends of the pair of levers on the side in contact with the chain. A structure is provided in which the state is mechanically changed by
Alternatively, at least one of the ends of the pair of levers opposite to the side contacting the chain detects information about the relative distance between the ends of the pair of levers contacting the chain. A detector is provided that electrically outputs as
　本開示に係るチェーン伸び検知装置であれば、１リンク単位でのチェーンの伸びを検知することが可能である。 With the chain elongation detection device according to the present disclosure, it is possible to detect elongation of the chain in units of one link.
動力伝達に用いられるチェーンの一般的な構造を示す斜視図である。1 is a perspective view showing a general structure of a chain used for power transmission; FIG. 実施の形態１によるチェーン伸び検知装置の構造を示す斜視図である。1 is a perspective view showing the structure of a chain elongation detection device according to Embodiment 1; FIG. 実施の形態１によるチェーン伸び検知装置の構造を示す斜視図である。1 is a perspective view showing the structure of a chain elongation detection device according to Embodiment 1; FIG. 実施の形態１における検知部品の周辺を示す斜視図である。4 is a perspective view showing the periphery of the detection component in Embodiment 1. FIG. 実施の形態１によるチェーン伸び検知装置において、伸びのないチェーンの走行時の状態を示す正面図である。FIG. 2 is a front view showing a state in which the chain is running without elongation in the chain elongation detection device according to Embodiment 1; 実施の形態１によるチェーン伸び検知装置において、伸びのあるチェーンの走行時の状態を示す正面図である。FIG. 4 is a front view showing a state in which an elongated chain is running in the chain elongation detection device according to Embodiment 1; 図６から更にチェーンが走行した状態を示す正面図である。FIG. 7 is a front view showing a state in which the chain has traveled further from FIG. 6; 実施の形態１における検知部品の変形例を示す斜視図である。FIG. 10 is a perspective view showing a modification of the detection component according to Embodiment 1; 実施の形態１における検知部品の変形例を示す正面図である。FIG. 4 is a front view showing a modification of the detection component in Embodiment 1; 実施の形態２によるチェーン伸び検知装置を示す図である。FIG. 10 is a diagram showing a chain elongation detection device according to Embodiment 2; 実施の形態２によるチェーン伸び検知装置の第１変形例を示す図である。FIG. 10 is a diagram showing a first modification of the chain elongation detection device according to Embodiment 2; 実施の形態２によるチェーン伸び検知装置の第２変形例を示す図である。FIG. 10 is a diagram showing a second modification of the chain elongation detection device according to Embodiment 2;
　以下、実施の形態について、添付の図面を参照して説明する。なお、各図において共通または対応する要素には、同一の符号を付すものとし、本開示では、重複する説明を簡略化または省略する。なお、本開示は、以下に説明する実施の形態に限定されるものではなく、以下の実施の形態によって開示される構成のあらゆる組合せおよび変形例を含み得るものである。 Hereinafter, embodiments will be described with reference to the attached drawings. Elements that are common or correspond to each figure are denoted by the same reference numerals, and overlapping descriptions are simplified or omitted in the present disclosure. In addition, the present disclosure is not limited to the embodiments described below, and may include all combinations and modifications of the configurations disclosed by the following embodiments.
実施の形態１．
　図１は、動力伝達に用いられるチェーン１の一般的な構造を示す斜視図である。チェーン１は、１対のスプロケットに巻き掛けられた当該チェーン１の張力によって動力を伝達する動力伝達構造を構成する部材である。 Embodiment 1.
FIG. 1 is a perspective view showing a general structure of a chain 1 used for power transmission. The chain 1 is a member constituting a power transmission structure that transmits power by tension of the chain 1 wound around a pair of sprockets.
　図１に示すように、チェーン１は、交互に連結する外リンク１１と内リンク１２とによって構成される。外リンク１１は、リンクプレートとピン１３とが一体になった部材である。内リンク１２は、リンクプレートとブッシュ１４とが一体になった部材である。ピン１３は、ブッシュ１４を貫通し、回転摺動する。また、ブッシュ１４の外側には、チェーンローラ１５が取り付けられる。チェーンローラ１５は、動力を伝達するための１対のスプロケットの歯と噛み合う。 As shown in FIG. 1, the chain 1 is composed of outer links 11 and inner links 12 that are alternately connected. The outer link 11 is a member in which a link plate and a pin 13 are integrated. The inner link 12 is a member in which a link plate and a bush 14 are integrated. The pin 13 penetrates the bush 14 and rotates and slides. A chain roller 15 is attached to the outside of the bush 14 . A chain roller 15 meshes with a pair of sprocket teeth for transmitting power.
　チェーン１の伸びは、主に、ピン１３とブッシュ１４との間での回転摺動による摩耗を原因として生じる。チェーン１の伸びによって、隣接する外リンク１１同士、あるいは、隣接する内リンク１２同士の間隔が広がる。チェーン１のリンク間の寸法は「チェーンピッチ」と呼ばれ、このチェーンピッチはチェーン１のサイズに応じて規格で定められている。チェーン１の伸びは、チェーンピッチからの伸び率（％）で表される。 The elongation of the chain 1 is mainly caused by wear due to rotational sliding between the pin 13 and the bush 14. The elongation of the chain 1 widens the distance between adjacent outer links 11 or between adjacent inner links 12 . The dimension between the links of the chain 1 is called "chain pitch", and this chain pitch is defined by standards according to the size of the chain 1. The elongation of the chain 1 is represented by the elongation rate (%) from the chain pitch.
　図１に示す構造において、特定の外リンク１１が備える１対のピン１３同士の間隔の寸法は、当該外リンク１１のリンクプレートに伸びが生じない限りは変化しない。同様に、特定の内リンク１２が備える１対のブッシュ１４同士の間隔の寸法は、当該内リンク１２のリンクプレートに伸びが生じない限りは変化しない。このことからも、チェーン１の伸びは、隣接する外リンク１１同士、あるいは、隣接する内リンク１２同士の間隔の寸法変化として表れることがわかる。 In the structure shown in FIG. 1, the dimension of the spacing between the pair of pins 13 provided on a specific outer link 11 does not change unless the link plate of the outer link 11 is stretched. Similarly, the distance between the pair of bushings 14 of a particular inner link 12 does not change unless the link plate of the inner link 12 stretches. From this, it can be seen that the elongation of the chain 1 appears as a dimensional change in the interval between adjacent outer links 11 or adjacent inner links 12 .
　本開示に係るチェーン伸び検知装置は、隣接するリンク同士の間隔の寸法変化を、リンクとの接触によって直接的に機械的に検知するものである。図２および図３は、実施の形態１によるチェーン伸び検知装置の構造を示す斜視図である。 The chain elongation detection device according to the present disclosure directly and mechanically detects dimensional changes in the spacing between adjacent links by contact with the links. 2 and 3 are perspective views showing the structure of the chain elongation detection device according to Embodiment 1. FIG.
　本実施の形態に係るチェーン伸び検知装置は、土台４を備える。土台４には一対のレバーが取り付けられている。この１対のレバーは、それぞれ、左レバー２および右レバー３である。また、土台４には、伸び検知の対象となるチェーン１を挟持して当該チェーン１にチェーン伸び検知装置を固定するためのチェーンガイド５が取り付けられている。 A chain elongation detection device according to the present embodiment includes a base 4 . A pair of levers are attached to the base 4 . The pair of levers are a left lever 2 and a right lever 3, respectively. Further, a chain guide 5 is attached to the base 4 for sandwiching the chain 1 whose elongation is to be detected and fixing the chain elongation detection device to the chain 1 .
　本実施の形態に係るチェーン伸び検知装置は、土台４上に設けられた、１対の回転軸を備える。この１対の回転軸は、それぞれ、回転軸Ｐ２および回転軸Ｐ３である。この１対の回転軸は、その軸中心を結ぶ直線が対象となるチェーン１の走行方向と平行になるように設置される。また、この一対の回転軸同士の間の寸法は、チェーン１のチェーンピッチと同じ寸法に設定されている。回転軸Ｐ２は、本開示に係る第１回転軸の一例である。回転軸Ｐ３は、本開示に係る第２回転軸の一例である。 The chain elongation detection device according to this embodiment has a pair of rotating shafts provided on the base 4 . The pair of rotation axes are the rotation axis P2 and the rotation axis P3, respectively. The pair of rotating shafts are installed such that a straight line connecting the centers of the shafts is parallel to the running direction of the target chain 1 . Also, the dimension between the pair of rotating shafts is set to the same dimension as the chain pitch of the chain 1 . The rotating shaft P2 is an example of a first rotating shaft according to the present disclosure. The rotating shaft P3 is an example of a second rotating shaft according to the present disclosure.
　左レバー２は、回転軸Ｐ２を回転中心として回転自由に取り付けられている。右レバー３は、回転軸Ｐ３を回転中心として回転自由に取り付けられている。左レバー２は、本開示に係る第１レバーの一例である。右レバー３は、本開示に係る第２レバーの一例である。 The left lever 2 is freely rotatable around the rotation axis P2. The right lever 3 is rotatably mounted around a rotation axis P3. The left lever 2 is an example of a first lever according to the present disclosure. The right lever 3 is an example of a second lever according to the present disclosure.
　１対のレバーは、チェーン１の隣接する外リンク１１の側面あるいは隣接する内リンク１２の側面に接触可能な端部を有する。この１対の端部は、それぞれのチェーン１への接触状態が同じになるように形成されている。具体的には、左レバー２のチェーン１側の端部から回転軸Ｐ２までの部分の長さは、右レバー３のチェーン１側の端部から回転軸Ｐ３までの部分の長さと同じに設定される。また、左レバー２および右レバー３のそれぞれのチェーン１側の端部の形状は、チェーン１のリンク側面と同じ回転姿勢において同じ接触状態になるように設計されている。 A pair of levers has ends that can contact the side surfaces of the adjacent outer links 11 or the adjacent inner links 12 of the chain 1 . The pair of ends are formed so that they are in the same contact state with the chain 1 . Specifically, the length of the portion from the end of the left lever 2 on the chain 1 side to the rotation axis P2 is set to be the same as the length of the portion from the end of the right lever 3 on the chain 1 side to the rotation axis P3. be done. Further, the shapes of the ends of the left lever 2 and the right lever 3 on the chain 1 side are designed so that they are in the same contact state with the link side surface of the chain 1 in the same rotational posture.
　図２において、チェーン１は、紙面右側に向かって走行することとする。左レバー２には、回転軸Ｐ２を中心とした時計回りの回転力がバネ６等の手段によって付加されている。同様に、右レバー３には、回転軸Ｐ３を中心とした時計回りの回転力がバネ６等の手段によって付加されている。左レバー２および右レバー３は、それぞれ、土台４に固定されたストッパ７によって初期姿勢が保たれている。 In FIG. 2, the chain 1 runs toward the right side of the paper. The left lever 2 is applied with a clockwise rotational force about the rotational axis P2 by means of a spring 6 or the like. Similarly, the right lever 3 is applied with a clockwise rotational force about the rotational axis P3 by means of a spring 6 or the like. The left lever 2 and the right lever 3 are each maintained in their initial postures by stoppers 7 fixed to the base 4 .
　図２に示す状態では、左レバー２および右レバー３は、チェーン１の走行方向に対して鉛直の姿勢をとっている。この状態において、左レバー２および右レバー３のチェーン１側の端部は、チェーン１のリンク側面に接していない。この状態において、左レバー２および右レバー３は、回転力を付与するバネ６等の手段によってストッパ７に押し付けられた初期姿勢をとっている。 　In the state shown in Fig. 2, the left lever 2 and the right lever 3 are in a vertical posture with respect to the running direction of the chain 1. In this state, the ends of the left lever 2 and the right lever 3 on the chain 1 side are not in contact with the link side surfaces of the chain 1 . In this state, the left lever 2 and the right lever 3 are in an initial posture pressed against the stopper 7 by means such as a spring 6 that imparts a rotational force.
　本開示において、１対のレバーの少なくとも一方のチェーン１と接触する側と反対側の端部には、１対のレバーのチェーン１と接触する側の１対の端部同士の相対的な間隔の変化に応じて状態が機械的に変化する構造が設けられている。一例として、本実施の形態では、図３に示すように、左レバー２の先端部に、レバーの回転の接線方向に貫通する孔が設けられた部材が取り付けられている。この孔に挿入されて摺動可能な検知部品８が、左レバー２の先端部に設置されている。図４は、実施の形態１における検知部品８の周辺を示す斜視図である。 In the present disclosure, the end of at least one of the pair of levers opposite to the side contacting the chain 1 has a relative spacing between the pair of ends of the pair of levers contacting the chain 1 . A structure is provided that mechanically changes state in response to a change in . As an example, in this embodiment, as shown in FIG. 3, a member having a hole penetrating in the tangential direction of the rotation of the lever is attached to the tip of the left lever 2 . A detection part 8 that can be inserted into this hole and slidable is installed at the tip of the left lever 2 . FIG. 4 is a perspective view showing the periphery of the detection component 8 according to Embodiment 1. FIG.
　図３において左レバー２および右レバー３は、図２と同様に、回転力を付与するバネ６等の手段によってストッパ７に押し付けられた初期姿勢をとっている。この状態では、両レバーのチェーン１とは反対側の端部において、検知部品８と右レバー３の先端とは、接触あるいは一定の距離で離れた位置関係となっている。図３に示す状態では、検知部品８の右レバー３と反対側の端部は、左レバー２の先端部の貫通孔から飛び出していない。 　In FIG. 3, the left lever 2 and the right lever 3 are in an initial posture in which they are pressed against the stopper 7 by means such as a spring 6 that imparts a rotational force, as in FIG. In this state, the detection part 8 and the tip of the right lever 3 are in contact with each other or separated by a certain distance at the ends of the levers opposite to the chain 1 . In the state shown in FIG. 3 , the end of the detection component 8 opposite to the right lever 3 does not protrude from the through hole at the tip of the left lever 2 .
　図５は、実施の形態１によるチェーン伸び検知装置において、伸びのないチェーン１の走行時の状態を示す正面図である。図５は、図３の状態からチェーン１が紙面右側に移動した状態を示している。上述した通り、１対の回転軸は、軸中心を結ぶ直線がチェーン１の走行方向と平行となるように設置されている。回転軸同士の間の寸法は、チェーン１のチェーンピッチと同じ寸法に設定さている。また、両レバーのチェーン１側の端部から回転軸までの距離は、同じになっている。そして、両レバーのチェーン１に接する部分の形状もまた、同じになっている。このため、伸びのないチェーン１が進行方向に移動すると、１対のレバーのチェーン１側の端部は、同じタイミングでそれぞれリンク外形の同じ位置と接触する。チェーン１の移動に伴って、１対のレバーは、それぞれの回転軸Ｐ２および回転軸Ｐ３に対して同じ回転角度で回転動作を行う。チェーン１に伸びがない場合、両レバーは平行を維持して動く。また、両レバーのチェーン１側と反対側の端部同士は、初期に設定された間隔から接近することはない。左レバー２の先端に設置された検知部品８と右レバー３の先端との距離も変化することはない。 FIG. 5 is a front view showing the state of the chain 1 running without elongation in the chain elongation detection device according to Embodiment 1. FIG. FIG. 5 shows a state in which the chain 1 has moved to the right side of the drawing from the state shown in FIG. As described above, the pair of rotating shafts are installed such that the straight line connecting the shaft centers is parallel to the running direction of the chain 1 . The dimension between the rotating shafts is set to the same dimension as the chain pitch of the chain 1 . Further, the distances from the chain 1 side ends of both levers to the rotation shaft are the same. The shape of the portions of both levers that come into contact with the chain 1 is also the same. Therefore, when the chain 1 without elongation moves in the direction of travel, the ends of the pair of levers on the chain 1 side come into contact with the same positions on the outer shape of the links at the same timing. As the chain 1 moves, the pair of levers rotate at the same rotation angle about their respective rotation axes P2 and P3. When the chain 1 is not stretched, both levers move while maintaining parallelism. Also, the ends of both levers on the chain 1 side and the opposite side do not come close to each other beyond the initially set interval. The distance between the detection part 8 installed at the tip of the left lever 2 and the tip of the right lever 3 does not change either.
　図６は、実施の形態１によるチェーン伸び検知装置において、伸びのあるチェーン１の走行時の状態を示す正面図である。図７は、図６から更にチェーン１が走行した状態を示す正面図である。 FIG. 6 is a front view showing a state in which the chain 1 with elongation is running in the chain elongation detection device according to the first embodiment. FIG. 7 is a front view showing a state in which the chain 1 has traveled further from FIG.
　上述した通り、チェーン１に伸びがない状態では、隣接するリンクＡとリンクＢとの間隔は、チェーンサイズによって規定されたチェーンピッチｐとなっている。図３および図５に示す状態において、左レバー２と右レバー３とは、チェーン１に伸びのない状態、つまりチェーンピッチｐの間隔で隣接するリンクに、それぞれ接している。一方、伸び率α％の伸びが生じたチェーン１では、リンクＡとリンクＢとの間隔は、次式（１）で表される寸法になる。
　（１＋α／１００）×ｐ　・・・（１） As described above, when the chain 1 is not stretched, the interval between the adjacent links A and B is the chain pitch p defined by the chain size. In the state shown in FIGS. 3 and 5, the left lever 2 and the right lever 3 are in contact with the links adjacent to each other at the chain pitch p, in a state where the chain 1 is not stretched. On the other hand, in the chain 1 stretched at the elongation rate α%, the distance between the link A and the link B is expressed by the following formula (1).
(1+α/100)×p (1)
　図６において、リンクＡとリンクＢとの間隔は、チェーンピッチｐよりも大きい状態になっている。図６において、リンクＡとリンクＢとの間隔は、具体的に、（１＋α／１００）×ｐの寸法となっている。図６において、リンクＡは、左レバー２を通過し右レバーと接触している。 In FIG. 6, the interval between link A and link B is larger than chain pitch p. In FIG. 6, the distance between link A and link B is specifically a dimension of (1+α/100)×p. In FIG. 6, link A passes through left lever 2 and contacts the right lever.
　図６の状態からチェーン１が更に走行して図７の状態になると、リンクＢが左レバー２と接触する前に、リンクＡと右レバー３とが接触する。そして、両レバーのうち右レバー３のみが回転して傾き始める。左レバー２がリンクＢと接触するまでは、右レバー３のみが回転を続けることになり、当該右レバー３の先端が左レバー２の先端に接近することで、検知部品８が押し込まれて摺動する。 When the chain 1 further travels from the state of FIG. 6 to the state of FIG. 7, the link A and the right lever 3 come into contact with each other before the link B comes into contact with the left lever 2. Then, of the two levers, only the right lever 3 begins to rotate and tilt. Until the left lever 2 contacts the link B, only the right lever 3 continues to rotate, and when the tip of the right lever 3 approaches the tip of the left lever 2, the detection part 8 is pushed in and slides. move.
　想定されるチェーン伸び率に対して右レバー３の先端が左レバー２の先端に接近する距離は、予め求めることができる。右レバー３のチェーン１側端部から回転軸Ｐ３までの距離をＬ１とする。右レバー３のチェーン１側と反対側の端部から回転軸Ｐ３までの距離をＬ２とする。そして、チェーン１の伸び率をα（％）とする。右レバー３がリンクＡとの接触により回転を始めてから左レバー２がリンクＢとの接触により回転を始めるまでのチェーン１の移動量は、伸び率α（％）の分である。この移動量は、ｐ×α／１００で表すことができる。この間に、チェーン１と反対側の右レバー３端部が左レバー２に対して接近する量は、次式（２）で求めることができる。
　（ｐ×α／１００）×（Ｌ２／Ｌ１）　・・・（２） The distance at which the tip of the right lever 3 approaches the tip of the left lever 2 for an assumed chain elongation rate can be obtained in advance. Let L1 be the distance from the end of the right lever 3 on the chain 1 side to the rotation axis P3. Let L2 be the distance from the end of the right lever 3 opposite to the chain 1 side to the rotation axis P3. Let α (%) be the elongation rate of the chain 1 . The amount of movement of the chain 1 from when the right lever 3 contacts the link A and starts rotating until the left lever 2 contacts the link B and starts rotating is the elongation rate α (%). This amount of movement can be represented by p×α/100. During this period, the amount by which the end of the right lever 3 on the opposite side of the chain 1 approaches the left lever 2 can be obtained by the following equation (2).
(p×α/100)×(L2/L1) (2)
　検知部品８の右レバー３とは反対側の端部は、図３に示す初期姿勢においては左レバー２の先端部の貫通孔から飛び出ていない。チェーン１の伸びに伴って右レバー３が回転することで、検知部品８は貫通孔に押し込まれる。ここで、検知部品８が左レバー２の貫通孔から飛び出すまでの押し込み量を、式（２）によって求められる量よりも小さくしておくと、図７に示す通り、予め設定された特定のチェーン伸び率α（％）以上の伸びがチェーン１に生じていることを外部から容易に目視で確認することができる。 The end of the detection part 8 opposite to the right lever 3 does not protrude from the through hole at the tip of the left lever 2 in the initial posture shown in FIG. As the right lever 3 rotates as the chain 1 stretches, the detection part 8 is pushed into the through hole. Here, if the pushing amount until the detection part 8 jumps out of the through hole of the left lever 2 is set smaller than the amount obtained by the formula (2), as shown in FIG. From the outside, it is possible to easily visually confirm that the chain 1 is stretched at the elongation rate α (%) or more.
　本実施の形態では、検知すべき伸びの有無を示すための検知部品８と当該検知部品８が摺動するための貫通孔を左レバー２の先端に設けている。検知部品８と当該検知部品８が摺動するための貫通孔は、右レバー３の先端に設けても良い。また、各レバーの先端に設けられる機械的な構造は、検知部品８とは異なる任意の機械要素からなる構造でよい。例えば、特定の伸び率以上の伸びを示すものに限られず、単に伸びの有無を示す構造であってもよい。 In this embodiment, a detection part 8 for indicating the presence or absence of elongation to be detected and a through hole for sliding the detection part 8 are provided at the tip of the left lever 2 . A through-hole for sliding between the detection component 8 and the detection component 8 may be provided at the tip of the right lever 3 . Moreover, the mechanical structure provided at the tip of each lever may be a structure composed of arbitrary mechanical elements different from the detection part 8 . For example, the structure is not limited to one showing elongation at a specific elongation rate or higher, and may be a structure that simply indicates the presence or absence of elongation.
　以上のように、本実施の形態によれば、チェーン１に対して、目的とする伸び率以上の伸びが生じているかどうかを、チェーン１の全域にわたって１リンク単位で調査可能なチェーン伸び検知装置が得られる。また、本実施の形態では、チェーン１の伸びの有無を、機械的な変化によって外部に知らせる手段を用いている。本実施の形態であれば、電気的な配線を必要とせず、設置や作業性の面において有利なチェーン伸び検知装置が得られる As described above, according to the present embodiment, the chain elongation detection device is capable of investigating whether or not elongation of the chain 1 equal to or greater than the target elongation rate occurs over the entire area of the chain 1 on a link-by-link basis. is obtained. Further, in the present embodiment, a means for informing the outside of the presence or absence of elongation of the chain 1 by means of a mechanical change is used. According to this embodiment, it is possible to obtain a chain elongation detection device that does not require electrical wiring and is advantageous in terms of installation and workability.
　また、図８は、実施の形態１における検知部品８の変形例を示す斜視図である。図９は、実施の形態１における検知部品８の変形例を示す正面図である。本変形例において、検知部品８は、チェーン１の複数の特定の伸び率以上の伸びが当該チェーン１に生じていることを機械的な変化によって外部から目視可能とするように構成されている。具体的に、検知部品８は、右レバー３と接触する側と反対側の先端から順番に、当該先端からの距離に応じて異なる色が塗られている。 Also, FIG. 8 is a perspective view showing a modification of the detection component 8 in the first embodiment. FIG. 9 is a front view showing a modification of the detection component 8 according to Embodiment 1. FIG. In this modified example, the detection part 8 is configured to make it possible to visually confirm from the outside that the chain 1 has stretched at a plurality of specific elongation rates or more by means of mechanical changes. Specifically, the detection part 8 is coated with different colors depending on the distance from the tip, starting from the tip on the side opposite to the side in contact with the right lever 3 .
　両レバー先端の接近する量は、上述した式（２）で表すことができる。この式を用いることで、複数の特定の伸び率における両レバーの接近量、すなわち検知部品８の押し込み量を、それぞれ求めることができる。 The amount by which the tips of both levers approach can be expressed by the above equation (2). By using this formula, the amount of approach of both levers at a plurality of specific elongation rates, that is, the amount of depression of the detection part 8 can be obtained.
　図９（ａ）は、伸びがゼロの状態を示している。図９（ｂ）は、伸び率がα１の状態を示している。図９（ｃ）は、伸び率がα２の状態を示している。ここで伸び率の関係は、ゼロ＜α１＜α２である。本変形例では、図９に示すように、検知部品８が貫通孔から突出した部分の色を見分けることで、チェーン１が有する最大の伸び率を外部から目視で確認することができる。 Fig. 9(a) shows a state where the elongation is zero. FIG. 9(b) shows a state where the elongation rate is α1. FIG. 9(c) shows a state where the elongation rate is α2. Here, the elongation ratio relationship is zero<α1<α2. In this modification, as shown in FIG. 9, the maximum elongation rate of the chain 1 can be visually confirmed from the outside by distinguishing the color of the portion where the detection part 8 protrudes from the through hole.
実施の形態２．
　次に、実施の形態２によるチェーン伸び検知装置について説明する。なお、実施の形態１と同じ又は相当する部分については、図示および説明を省略する。本実施の形態では、実施の形態１との相違点について説明する。 Embodiment 2.
Next, a chain elongation detection device according to Embodiment 2 will be described. Illustrations and descriptions of portions that are the same as or correspond to those of the first embodiment are omitted. In this embodiment, differences from the first embodiment will be described.
　図１０は、実施の形態２によるチェーン伸び検知装置を示す図である。本実施の形態において、１対のレバーの少なくとも一方のチェーン１と接触する側と反対側の端部には、１対のレバーのチェーン１と接触する側の１対の端部同士の相対的な間隔の情報を検出して電気的に出力する検出器が設けられている。 FIG. 10 is a diagram showing a chain elongation detection device according to Embodiment 2. FIG. In this embodiment, at least one end of the pair of levers opposite to the side in contact with the chain 1 is provided with a relative A detector is provided for detecting and electrically outputting the information of the interval.
　一例として、左レバー２の先端には、右レバー３の先端からの一定の押し込み量を検知することでＯＮ／ＯＦＦとなるリミットスイッチ９が設置される。リミットスイッチ９は、本開示に係る検出器の一例である。 As an example, the tip of the left lever 2 is provided with a limit switch 9 that turns ON/OFF by detecting a certain pushing amount from the tip of the right lever 3 . Limit switch 9 is an example of a detector according to the present disclosure.
　リミットスイッチ９は、実施の形態１における検知部品８と同様の機能を有する。リミットスイッチ９は、チェーン１に特定の伸び率以上の伸びが生じているか否かに応じて動作する。チェーン１に特定の伸び率以上の伸びが生じている場合、リミットスイッチ９が右レバー３によって押し込まれる。これによって、リミットスイッチ９はＯＮになる。このリミットスイッチ９からの信号は、別途設けた信号処理部１０に出力される。信号処理部１０は、音声、画面表示または光等の任意の手法によって、リミットスイッチ９がＯＮになったことを外部に報知する。これにより、チェーン１に特定の伸び率以上の伸びが生じていることを容易に確認することができる。なお、信号処理部１０は、チェーン伸び検知装置に組み込まれていてもよいし、外部装置として構成されていてもよい。 The limit switch 9 has the same function as the detection component 8 in the first embodiment. The limit switch 9 operates depending on whether or not the chain 1 has been stretched to a specific elongation rate or more. The limit switch 9 is pushed in by the right lever 3 when the chain 1 is stretched beyond a specific elongation rate. As a result, the limit switch 9 is turned ON. A signal from the limit switch 9 is output to a separately provided signal processing section 10 . The signal processing unit 10 notifies the outside that the limit switch 9 has been turned on by any method such as voice, screen display, light, or the like. As a result, it is possible to easily confirm that the chain 1 is stretched at a specific elongation rate or more. Note that the signal processing unit 10 may be incorporated in the chain elongation detection device, or may be configured as an external device.
　また、図１１は、実施の形態２によるチェーン伸び検知装置の第１変形例を示す図である。信号処理部１０に代えて、例えば、外部から視認可能なＬＥＤを設けてもよい。このＬＥＤは、リミットスイッチ９がＯＮになることで点灯するように構成される。 Also, FIG. 11 is a diagram showing a first modification of the chain elongation detection device according to the second embodiment. Instead of the signal processing unit 10, for example, an externally visible LED may be provided. This LED is configured to light up when the limit switch 9 is turned on.
　本実施の形態によれば、チェーン１の伸びの情報が外部に出力されるため、チェーン１近傍を開放したり、チェーン１自体を目視したりする必要がない。 According to the present embodiment, information about elongation of the chain 1 is output to the outside, so there is no need to open the vicinity of the chain 1 or visually check the chain 1 itself.
　また、図１２は、実施の形態２によるチェーン伸び検知装置の第２変形例を示す図である。例えば、左レバー２の先端には、リミットスイッチ９に代えて、相対する物体の相対的な距離を検知する変位検出手段として、変位センサ２０が設けられていてもよい。変位センサ２０は、光学的、あるいは磁気的な手段を用いて非接触な測定が可能なものである。変位センサ２０は、左レバー２の先端と右レバー３の先端との接近量の情報を電気的に出力する。変位センサ２０から出力された情報は、例えば、信号処理部１０によって処理される。本変形例によっても、チェーン１の伸びを１リンク単位で容易に検知することが可能である。 FIG. 12 is a diagram showing a second modification of the chain elongation detection device according to the second embodiment. For example, instead of the limit switch 9, a displacement sensor 20 may be provided at the tip of the left lever 2 as displacement detection means for detecting the relative distance between opposing objects. The displacement sensor 20 is capable of non-contact measurement using optical or magnetic means. The displacement sensor 20 electrically outputs information on the amount of approach between the tip of the left lever 2 and the tip of the right lever 3 . Information output from the displacement sensor 20 is processed by the signal processing unit 10, for example. This modified example also makes it possible to easily detect the elongation of the chain 1 in units of one link.
　本開示に係るチェーン伸び検知装置は、例えば、動力伝達機構を構成するチェーンの伸びを検知するために利用される。 A chain elongation detection device according to the present disclosure is used, for example, to detect elongation of a chain that constitutes a power transmission mechanism.
　１　チェーン、　２　左レバー、　３　右レバー、　４　土台、　５　チェーンガイド、　６　バネ、　７　ストッパ、　８　検知部品、　９　リミットスイッチ、　１０　信号処理部、　１１　外リンク、　１２　内リンク、　１３　ピン、　１４　ブッシュ、　１５　チェーンローラ、　２０　変位センサ 1 Chain, 2 Left lever, 3 Right lever, 4 Base, 5 Chain guide, 6 Spring, 7 Stopper, 8 Detection part, 9 Limit switch, 10 Signal processing part, 11 Outer link, 12 Inner link, 13 Pin, 14 Bush , 15 chain roller, 20 displacement sensor

Claims (6)

  1. 　軸中心を結ぶ直線が対象となるチェーンの走行方向と平行となるように設置された１対の回転軸と、
    　前記回転軸を回転中心として回転自由に取り付けられた１対のレバーと、
    　を備え、
    　前記１対の回転軸同士の間の寸法は、前記チェーンのチェーンピッチと同じ寸法に設定され、
    　前記１対のレバーは、前記チェーンの隣接する外リンクの側面あるいは隣接する内リンクの側面に接触可能な１対の端部を有し、当該１対の端部は、それぞれの前記チェーンへの接触状態が同じになるように形成され、
    　前記１対のレバーの少なくとも一方の前記チェーンと接触する側と反対側の端部には、前記１対のレバーの前記チェーンと接触する側の前記１対の端部同士の相対的な間隔の変化に応じて状態が機械的に変化する構造が設けられていることを特徴とするチェーン伸び検知装置。     a pair of rotating shafts installed so that the straight line connecting the shaft centers is parallel to the running direction of the target chain;
    a pair of levers rotatably mounted around the rotation shaft;
    with
    The dimension between the pair of rotating shafts is set to the same dimension as the chain pitch of the chain,
    The pair of levers has a pair of ends capable of contacting the side surfaces of adjacent outer links or the side surfaces of adjacent inner links of the chain, and the pair of ends are connected to the respective chains. Formed so that the contact state is the same,
    At the end of at least one of the pair of levers opposite to the side in contact with the chain, there is provided a relative distance between the pair of ends of the pair of levers on the side in contact with the chain. A chain elongation detection device, comprising a structure that mechanically changes its state in response to a change.
  2. 　前記１対のレバーの少なくとも一方の前記チェーンと接触する側と反対側の端部に、予め設定した前記チェーンの特定の伸び率以上の伸びが当該チェーンに生じていることを機械的な変化によって外部から目視可能とする検知部品が設けられていることを特徴とする請求項１に記載のチェーン伸び検知装置。 It is determined by mechanical change that elongation equal to or greater than a predetermined specific elongation rate of the chain has occurred in the end of at least one of the pair of levers opposite to the side in contact with the chain. 2. The chain elongation detection device according to claim 1, further comprising a detection part that can be visually observed from the outside.
  3. 　前記検知部品は、前記チェーンの複数の特定の伸び率以上の伸びが当該チェーンに生じていることを機械的な変化によって外部から目視可能とするように構成されている請求項２に記載のチェーン伸び検知装置。 3. The chain according to claim 2, wherein the detection part is configured to visually confirm from the outside that elongation of the chain equal to or greater than a plurality of specific elongation rates of the chain has occurred in the chain through mechanical changes. Elongation detection device.
  4. 　軸中心を結ぶ直線が対象となるチェーンの走行方向と平行となるように設置された１対の回転軸と、
    　前記回転軸を回転中心として回転自由に取り付けられた１対のレバーと、
    　を備え、
    　前記１対の回転軸同士の間の寸法は、前記チェーンのチェーンピッチと同じ寸法に設定され、
    　前記１対のレバーは、前記チェーンの隣接する外リンクの側面あるいは隣接する内リンクの側面に接触可能な１対の端部を有し、当該１対の端部は、それぞれの前記チェーンへの接触状態が同じになるように形成され、
    　前記１対のレバーの少なくとも一方の前記チェーンと接触する側と反対側の端部には、前記１対のレバーの前記チェーンと接触する側の前記１対の端部同士の相対的な間隔の情報を検出して電気的に出力する検出器が設けられていることを特徴とするチェーン伸び検知装置。     a pair of rotating shafts installed so that the straight line connecting the shaft centers is parallel to the running direction of the target chain;
    a pair of levers rotatably mounted around the rotation shaft;
    with
    The dimension between the pair of rotating shafts is set to the same dimension as the chain pitch of the chain,
    The pair of levers has a pair of ends capable of contacting the side surfaces of adjacent outer links or the side surfaces of adjacent inner links of the chain, and the pair of ends are connected to the respective chains. Formed so that the contact state is the same,
    At the end of at least one of the pair of levers opposite to the side in contact with the chain, there is provided a relative distance between the pair of ends of the pair of levers on the side in contact with the chain. A chain elongation detection device comprising a detector for detecting and electrically outputting information.
  5. 　前記検出器は、前記チェーンの特定の伸び率以上の伸びが当該チェーンに生じているか否かに応じて動作するスイッチによって構成されていることを特徴とする請求項４に記載のチェーン伸び検知装置。 5. A chain elongation detection device according to claim 4, wherein said detector comprises a switch that operates according to whether or not elongation of said chain exceeds a specific elongation rate of said chain. .
  6. 　前記検出器は、前記１対のレバーの前記チェーンと接触する側と反対側の端部同士の接近量の情報を電気的に出力する請求項４に記載のチェーン伸び検知装置。 The chain elongation detection device according to claim 4, wherein the detector electrically outputs information on the amount of approach between the ends of the pair of levers on the side opposite to the side in contact with the chain.
PCT/JP2021/026840 2021-07-16 2021-07-16 Chain extension detection device WO2023286277A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202180100459.7A CN117795283A (en) 2021-07-16 2021-07-16 Chain elongation detection device
JP2023534572A JPWO2023286277A1 (en) 2021-07-16 2021-07-16
PCT/JP2021/026840 WO2023286277A1 (en) 2021-07-16 2021-07-16 Chain extension detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/026840 WO2023286277A1 (en) 2021-07-16 2021-07-16 Chain extension detection device

Publications (1)

Publication Number Publication Date
WO2023286277A1 true WO2023286277A1 (en) 2023-01-19

Family

ID=84918831

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/026840 WO2023286277A1 (en) 2021-07-16 2021-07-16 Chain extension detection device

Country Status (3)

Country Link
JP (1) JPWO2023286277A1 (en)
CN (1) CN117795283A (en)
WO (1) WO2023286277A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02129806U (en) * 1989-03-31 1990-10-25
JPH1030923A (en) * 1996-05-13 1998-02-03 Tsubakimoto Chain Co Method and device for detecting degree of chain extension
JP2008068960A (en) * 2006-09-13 2008-03-27 Mitsubishi Electric Building Techno Service Co Ltd Elongation amount measuring device for escalator footstep chain
JP2016173244A (en) * 2015-03-16 2016-09-29 三菱電機株式会社 Chain elongation detector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02129806U (en) * 1989-03-31 1990-10-25
JPH1030923A (en) * 1996-05-13 1998-02-03 Tsubakimoto Chain Co Method and device for detecting degree of chain extension
JP2008068960A (en) * 2006-09-13 2008-03-27 Mitsubishi Electric Building Techno Service Co Ltd Elongation amount measuring device for escalator footstep chain
JP2016173244A (en) * 2015-03-16 2016-09-29 三菱電機株式会社 Chain elongation detector

Also Published As

Publication number Publication date
CN117795283A (en) 2024-03-29
JPWO2023286277A1 (en) 2023-01-19

Similar Documents

Publication Publication Date Title
RU2604249C2 (en) Method of belt, chain or rope tension in universal self-centering system
US9920815B2 (en) Energy guiding chain and monitoring system for protecting against line breaks
JP6505890B1 (en) Diagnostic device
TW201726484A (en) Chain guide sensor and methods of controlling a bicycle
CN104781052B (en) Articulation mechanism, finger and hands
US6178824B1 (en) Chain wear indicator
CN101055441A (en) Sheet thickness detection device, sheet conveying device, image forming apparatus
WO2023286277A1 (en) Chain extension detection device
KR20100053005A (en) Electricity connecting device of joint unit and robot having the same
US11378161B2 (en) Monitoring system for operating an energy chain
JP2005063648A5 (en)
JP2023165035A (en) Driving mechanism of robot hand having multiple fingers and robot hand
EP3656721B1 (en) Monitoring device for a conveyor
JP2000121465A (en) Apparatus and method for measurement of tension of belt
JP3671586B2 (en) Rotational torque sensor
CN101989095A (en) Slide mechanism and mounting method of slide mechanism
WO2018131758A1 (en) Power transmission apparatus
JP2009210550A (en) Chain position-speed detector
KR20210054639A (en) Optical Encoder
JP7293289B2 (en) Chain elongation detector
KR920009683A (en) Handrail drive assembly
US11112322B2 (en) Bicycle and spider capable of measuring power
KR100665543B1 (en) Torque detector with reflector for power steering system
KR101022549B1 (en) Computing Method for Gear ratio and Absolute Steering Angle of Steering Angle Sensing System
JP4266176B2 (en) Pressure roller detection device for handrail drive device of passenger conveyor

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21950214

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2023534572

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 202180100459.7

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE