JP4420291B2 - Abnormality detection device in agitator mixer of soil improvement machine - Google Patents

Abnormality detection device in agitator mixer of soil improvement machine Download PDF

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JP4420291B2
JP4420291B2 JP2005300115A JP2005300115A JP4420291B2 JP 4420291 B2 JP4420291 B2 JP 4420291B2 JP 2005300115 A JP2005300115 A JP 2005300115A JP 2005300115 A JP2005300115 A JP 2005300115A JP 4420291 B2 JP4420291 B2 JP 4420291B2
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protection device
driven
overload protection
sensor
friction plate
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JP2007107300A (en
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俊郎 堤
良充 湯澤
俊和 山口
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Sumitomo SHI Construction Machinery Co Ltd
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Description

本発明は土質改良機の撹拌ミキサに関するものであり、特に、土質改良機の撹拌ミキサにおける負荷状態の異常を検知する異常検知装置に関するものである。   The present invention relates to an agitation mixer for a soil conditioner, and more particularly to an abnormality detection device that detects an abnormality in a load state in the agitation mixer of a soil conditioner.

従来、埋め立て地等の軟弱地盤に土木建築等の構造物を建設する際、軟弱地盤に固化剤を撒布して脱水し、締め固めにより地盤を改良することが行われて来た。しかし、この方法は、土が水分の多い粘土や粘性のある土質の場合、十分な支持力が得られないことや、土が乾いたときに埃が多く出るという問題等があった。   Conventionally, when constructing a structure such as a civil engineering building on soft ground such as landfill, it has been practiced to spread the solidifying agent on the soft ground, dehydrate it, and improve the ground by compaction. However, this method has a problem that when the soil is clay having a high water content or a viscous soil, sufficient support force cannot be obtained, and a lot of dust is generated when the soil is dried.

このような問題を解決するために、現在では、軟弱地盤を掘削し、ここで掘削した土に土質改良剤を混ぜて土質の改良を行い、この改良処理をした土を再び建設箇所に戻す方法も行われており、そのための土質改良機も知られている。   In order to solve such problems, a method of excavating soft ground, mixing soil improver with the excavated soil, improving the soil quality, and returning the improved soil to the construction site again. Soil improvement machines for this purpose are also known.

例えば、ベルトコンベアで送られて来る泥土と土質改良剤を、羽根の回転により混合・撹拌処理する撹拌ミキサを有し、該撹拌ミキサは、ベルトコンベアの流れ方向に略９０度をなす角度で設けられた羽根と、該羽根を一体回転可能に取り付けた撹拌軸と、該撹拌軸に継ぎ手を介して動力連結された駆動モータを備え、該駆動モータの回転で撹拌軸と羽根を一体に回転させるようにした土質改良機が知られている（特許文献１参照）。
特開２００２−３１６０２８号公報（図４）。 For example, it has a stirring mixer that mixes and stirs mud and soil improver sent by a belt conveyor by rotating blades, and the stirring mixer is provided at an angle of approximately 90 degrees in the flow direction of the belt conveyor. Provided with a blade, a stirring shaft on which the blade is integrally rotatable, and a drive motor that is power-connected to the stirring shaft via a joint, and the stirring shaft and the blade are rotated integrally by the rotation of the drive motor. Such a soil quality improvement machine is known (see Patent Document 1).
Japanese Patent Laid-Open No. 2002-316028 (FIG. 4).

特許文献１記載の土質改良機の撹拌ミキサは、従動部側における羽根に異物等を噛み込んだ場合、過負荷状態となるが駆動モータは回転を継続しようとするため、従動部側における回転羽根の破損や、従動部側から駆動部側に過負荷トルクが加えられて駆動モータの焼損が生じることがある。また、撹拌ミキサへ原料の送り込みを継続するので、攪拌ミキサの閉塞及びその閉塞により原料の供給側も送り込み不能の異常を引き起こしてしまい、土質改良機全体の異常に繋がる虞があった。   The agitating mixer of the soil improvement machine described in Patent Document 1 is overloaded when foreign matter or the like is caught in the blade on the driven portion side, but the drive motor tries to continue rotation, so the rotating blade on the driven portion side. Or overload torque is applied from the driven portion side to the drive portion side, and the drive motor may be burned out. In addition, since the feed of the raw material to the agitating mixer is continued, the clogging of the agitating mixer and the clogging of the agitation mixer may cause an abnormality that prevents the feeding of the raw material, leading to an abnormality of the entire soil improvement machine.

このため、従動部と駆動部の間に過負荷保護装置を設け、軸トルクが所定値以上になって過負荷状態になった場合は、該過負荷保護装置に設けられた摩擦板で滑りを発生させてトルクの上昇を抑えるように構成することが考えられる。しかし、該過負荷保護装置により、従動部側と駆動部側の保護はできるが、過負荷保護装置の摩擦板が消耗してくるとすべり量が徐々に大きくなり、そのまま放置すると過負荷保護装置における初期設定の伝達トルクを保持できなくなる。   For this reason, an overload protection device is provided between the driven unit and the drive unit, and when the shaft torque becomes a predetermined value or more and an overload state occurs, the friction plate provided in the overload protection device slips. It is conceivable to configure such that the increase in torque is suppressed. However, the overload protection device can protect the driven portion side and the drive portion side. However, when the friction plate of the overload protection device is consumed, the slip amount gradually increases. The initial set transmission torque at cannot be maintained.

そこで、従動部側が過負荷状態になると過負荷保護装置に設けられた摩擦板で滑りを発生させるように構成し、そして、過負荷保護装置の摩擦板の消耗度を検知して過負荷保護装置における初期設定の伝達トルクを保持できるようにするために解決すべき技術的課題が生じてくるのであり、本発明はこの課題を解決することを目的とする。   Therefore, when the driven part is overloaded, the friction plate provided in the overload protection device is configured to generate slip, and the overload protection device detects the degree of wear of the friction plate of the overload protection device. Therefore, there is a technical problem to be solved in order to be able to maintain the initially set transmission torque, and the present invention aims to solve this problem.

本発明は上記目的を達成するために提案されたものであり、請求項１記載の発明は、羽根と一体に回転する撹拌軸を有する従動部と、前記撹拌軸に回転を付与する駆動部とを備え、前記羽根の回転により、土と土質改良剤を混合・撹拌処理する土質改良機の撹拌ミキサにおいて、前記従動部と前記駆動部の間に過負荷保護装置を設け、軸トルクが所定値以上になって過負荷状態になると、前記過負荷保護装置に設けられた摩擦板で滑りを発生させるように構成し、さらに、前記過負荷保護装置の駆動部側の回転状態を検出するセンサと、前記過負荷保護装置の従動部側の回転状態を検出するセンサを設け、前記従動部側のセンサの検出信号に基づいて過負荷状態を検知するとともに、前記駆動部側および従動部側の双方のセンサの検出信号に基づいて求められる駆動部側および従動部側の夫々の回転累積量の差によって前記過負荷保護装置の摩擦板の消耗度を検知する信号処理手段を備えたことを特徴とする土質改良機の撹拌ミキサにおける異常検知装置を提供する。 The present invention has been proposed to achieve the above object, and the invention according to claim 1 includes a driven portion having a stirring shaft that rotates integrally with a blade, and a drive portion that imparts rotation to the stirring shaft. In a stirring mixer of a soil improvement machine that mixes and stirs soil and a soil conditioner by rotation of the blade, an overload protection device is provided between the driven portion and the drive portion, and the shaft torque is a predetermined value. When the overload state is as described above, the friction plate provided in the overload protection device is configured to cause slippage, and further, a sensor that detects the rotational state of the drive unit side of the overload protection device; A sensor for detecting a rotation state of the driven portion side of the overload protection device, detecting an overload state based on a detection signal of the sensor on the driven portion side, and both the driving portion side and the driven portion side The detection signal of the sensor Stirring the soil improvement machine, characterized by comprising a signal processing means for detecting the degree of wear of the friction plates of Zui by the overload protection device by the difference in rotation cumulative amount of each of the driver side and driven side sought An abnormality detection device for a mixer is provided.

この構成によれば、軸トルクが所定値以上になって過負荷状態になると、過負荷保護装置に設けられた摩擦板で滑りが発生して従動部と駆動部の連結が外され、従動部側は回転を停止する。そして、過負荷保護装置の従動部側に設置したセンサの検出信号に基づいて過負荷状態であることを検知する。また、過負荷保護装置の駆動部および従動部側の双方のセンサの検出信号に基づいて前記過負荷保護装置の摩擦板の回転量のずれを検出し、該回転量のずれから摩擦板の消耗度を検知する。   According to this configuration, when the shaft torque becomes a predetermined value or more and an overload state occurs, the friction plate provided in the overload protection device slips, and the driven unit and the drive unit are disconnected, and the driven unit The side stops rotating. And it detects that it is an overload state based on the detection signal of the sensor installed in the driven part side of the overload protection device. Further, based on the detection signals of the sensors on both the drive unit and the driven unit side of the overload protection device, the deviation of the rotation amount of the friction plate of the overload protection device is detected, and the friction plate is consumed from the deviation of the rotation amount. Detect the degree.

本発明は、上述したように、例えば羽根が異物等を噛み込んで従動部側に過負荷トルクが発生すると、過負荷保護装置に設けられた摩擦板で滑りを発生させて駆動部側及び従動部側の双方を保護することができる。また、前記摩擦板の回転量のずれから摩擦板の消耗度を検知して、過負荷保護装置の初期設定を再設定する時期や摩擦板を新品に交換する時期を判定することができる。   As described above, according to the present invention, for example, when an overload torque is generated on the driven portion side due to the blades biting foreign matter or the like, the friction plate provided in the overload protection device generates a slip to drive the driven portion side and the driven portion. Both sides can be protected. Further, it is possible to detect the degree of wear of the friction plate from the deviation of the rotation amount of the friction plate, and determine when to reset the initial setting of the overload protection device and when to replace the friction plate with a new one.

以下、本発明の土質改良機の撹拌ミキサについて、好適な実施例をあげて説明する。従動部側が過負荷状態になると過負荷保護装置に設けられた摩擦板で滑りを発生させるように構成し、そして、過負荷保護装置の摩擦板の消耗度を検知して過負荷保護装置における初期設定の伝達トルクを保持できるようにするという目的を達成するために、羽根と一体に回転する撹拌軸を有する従動部と、前記撹拌軸に回転を付与する駆動部とを備え、前記羽根の回転により、土と土質改良剤を混合・撹拌処理する土質改良機の撹拌ミキサにおいて、前記従動部と前記駆動部の間に過負荷保護装置を設け、軸トルクが所定値以上になって過負荷状態になると、前記過負荷保護装置に設けられた摩擦板で滑りを発生させるように構成し、さらに、前記過負荷保護装置の駆動部側の回転状態を検出するセンサと、前記過負荷保護装置の従動部側の回転状態を検出するセンサを設け、前記従動部側のセンサの検出信号に基づいて過負荷状態を検知するとともに、前記駆動部側および従動部側の双方のセンサの検出信号に基づいて求められる駆動部側および従動部側の夫々の回転累積量の差によって前記過負荷保護装置の摩擦板の消耗度を検知する信号処理手段を備えたことにより実現した。 Hereinafter, the stirring mixer of the soil conditioner of the present invention will be described with reference to preferred embodiments. When the driven part is overloaded, the friction plate provided in the overload protection device is configured to generate slip, and the degree of wear of the friction plate of the overload protection device is detected to detect the initial level in the overload protection device. In order to achieve the object of maintaining the set transmission torque, the rotor includes a driven portion having a stirring shaft that rotates integrally with the blade, and a drive portion that imparts rotation to the stirring shaft, and the rotation of the blade. In the agitator mixer of the soil conditioner for mixing and agitating the soil and the soil conditioner, an overload protection device is provided between the driven unit and the drive unit, and the shaft torque becomes a predetermined value or more and an overload state is established. Then, the friction plate provided in the overload protection device is configured to generate a slip, and further, a sensor for detecting a rotation state on the drive unit side of the overload protection device, and the overload protection device Follower side A sensor for detecting the rotational state is provided, along with detecting the overload state based on a detection signal of the sensor of the driven side, it is determined based on the detection signal of both sensor of the driver side and driven side drive This is realized by providing a signal processing means for detecting the degree of wear of the friction plate of the overload protection device based on the difference in the accumulated amount of rotation between the part side and the driven part side .

図１は、本発明の一実施例である土質改良機の撹拌ミキサの側面図である。同図に示すように、攪拌ミキサ１は、固定基台２の上側に、底部が開放された函体３が固設されている。また、函体３の底部に近接して土質改良機における土搬送用のベルトコンベア４が設けられている。   FIG. 1 is a side view of an agitating mixer of a soil improvement machine according to an embodiment of the present invention. As shown in the figure, the stirring mixer 1 is provided with a box 3 having a bottom open on the upper side of the fixed base 2. In addition, a belt conveyor 4 for soil conveyance in the soil improvement machine is provided near the bottom of the box 3.

函体３の内部には、ベルトコンベア４の流れ方向（土及び土質改良剤等原料の移動方向）に対して略９０度をなす角度で撹拌軸６を設け、該撹拌軸６に複数個の撹拌用の羽根７，７…を一体回転可能に取り付けている。撹拌軸６は函体３の左右両側面を貫通して、該函体３の左右両側に突出しており、該函体３から突出している両端が、固定基台２に軸受８，８を介して回転可能に支持されている。   Inside the box 3, a stirring shaft 6 is provided at an angle of approximately 90 degrees with respect to the flow direction of the belt conveyor 4 (moving direction of raw materials such as soil and soil conditioner), and a plurality of stirring shafts 6 are provided on the stirring shaft 6. The stirring blades 7, 7,... Are attached so as to be integrally rotatable. The stirring shaft 6 penetrates the left and right side surfaces of the box 3 and protrudes to the left and right sides of the box 3, and both ends protruding from the box 3 are connected to the fixed base 2 via bearings 8 and 8. And is rotatably supported.

図２は、撹拌用の羽根７の構造例を示す拡大詳細図である。同図において、羽根７は、撹拌軸６の周面に、ホルダー９を介して、複数のブレード１０，１０…が放射状に固設されている。   FIG. 2 is an enlarged detail view showing a structural example of the stirring blade 7. In the figure, the blade 7 has a plurality of blades 10, 10... Radially fixed to the peripheral surface of the stirring shaft 6 via a holder 9.

図３は、要部を示す拡大詳細図である。同図において、撹拌軸６の一端側には、過負荷保護装置１１を介して、電動モータ１２が動力連結されている。駆動部である電動モータ１２は、従動部側となる撹拌軸６に回転駆動力を付与する。   FIG. 3 is an enlarged detail view showing a main part. In the figure, an electric motor 12 is motively connected to one end side of the stirring shaft 6 via an overload protection device 11. The electric motor 12 which is a drive part gives rotational drive force to the stirring shaft 6 used as the driven part side.

過負荷保護装置１１は、駆動部側となる電動モータ１２のモータ軸１３と一体回転可能に取り付けている駆動側ハブ１４と、従動部側となる撹拌軸６と一体回転可能に取り付けている従動側ハブ１５と、該駆動側ハブ１４と該従動側ハブ１５との間に設けられている摩擦板(図示せず)等で構成されている。   The overload protection device 11 includes a drive-side hub 14 that is attached so as to be integrally rotatable with the motor shaft 13 of the electric motor 12 that is on the drive part side, and a driven that is attached so as to be integrally rotatable with the stirring shaft 6 that is on the driven part side. The side hub 15 and a friction plate (not shown) provided between the driving side hub 14 and the driven side hub 15 are configured.

そして、過負荷保護装置１１は、上記摩擦板の摩擦保持力よりも小さい軸トルクが、従動部側と駆動部側との間に働いているときには、従動部側と駆動部側とが互いに動力連結し合って一体的に回転する。反対に、摩擦板の摩擦保持力よりも大きい軸トルク、すなわち過負荷状態の軸トルクが生じると、摩擦板が滑り(スリップ)を起こして空転し、従動部側と駆動部側との間の動力連結を断つようになっている。なお、ここで述べる摩擦板の空転とは、摩擦板内部に生ずる滑り(スリップ)による空転、及び摩擦板と従動部との間に生ずる滑りによる空転、摩擦板と駆動部との間に生ずる滑りによる空転のいずれをも含むものである。また、摩擦板による摩擦保持力の大きさは、設定により調整できる。   And when the axial torque smaller than the friction holding force of the friction plate is acting between the driven unit side and the driving unit side, the overload protection device 11 causes the driven unit side and the driving unit side to power each other. Connect and rotate together. On the other hand, when an axial torque larger than the friction holding force of the friction plate, that is, an axial torque in an overload state, the friction plate slips and slips, causing the friction between the driven unit side and the drive unit side. The power connection is cut off. Note that the idling of the friction plate described here refers to idling caused by slip (slip) occurring inside the friction plate, idling due to slip occurring between the friction plate and the driven portion, and slip occurring between the friction plate and the drive unit. It includes any of the idling. The magnitude of the frictional holding force by the friction plate can be adjusted by setting.

また、過負荷保護装置１１の従動部側には、従動側ハブ１５の回転状態を検出して対応した信号を出力する従動部側センサ１６を設け、過負荷保護装置１１の駆動部側には、駆動側ハブ１４の回転状態を検出して対応した信号を出力する駆動側センサ１７を設けている。本実施例では双方のセンサ１６，１７が近接スイッチにて構成されている。   Further, on the driven portion side of the overload protection device 11, a driven portion side sensor 16 that detects the rotation state of the driven side hub 15 and outputs a corresponding signal is provided, and on the drive portion side of the overload protection device 11. A driving side sensor 17 that detects the rotational state of the driving side hub 14 and outputs a corresponding signal is provided. In the present embodiment, both sensors 16 and 17 are constituted by proximity switches.

例えば、従動部側センサ１６について説明すれば、図４に示すように、従動側ハブ１５には、従動ハブ１５と一体に回転する半円弧状の被検出片２３が装着されており、前記従動部側センサ１６の先端部をこの被検出片２３の円周部に近接させた状態で固定基台２に取り付けてある。そして、被検出片２３が従動側ハブ１５と一体に回転して、被検出片２３が従動部側センサ１６の直前を横切るたびに、従動部側センサ１６から断続的に波形信号が出力される。   For example, the driven portion side sensor 16 will be described. As shown in FIG. 4, the driven side hub 15 is provided with a semicircular arc detected piece 23 that rotates integrally with the driven hub 15, and The front end of the part-side sensor 16 is attached to the fixed base 2 in a state in which it is close to the circumferential part of the detected piece 23. Then, every time the detected piece 23 rotates integrally with the driven-side hub 15 and the detected piece 23 crosses immediately before the driven-side sensor 16, a waveform signal is intermittently output from the driven-side sensor 16. .

駆動部側センサ１７については、図示はしないが、駆動側ハブ１４と一体に回転する半円弧状の被検出片が装着されており、前記駆動部側センサ１７の先端部をこの被検出片の円周部に近接させた状態で固定基台２に取り付けてある。そして、被検出片が駆動部側ハブ１４と一体に回転して、被検出片が駆動部側センサ１７の直前を横切るたびに、駆動部側センサ１７から断続的に波形信号が出力される。   Although not shown, the drive unit side sensor 17 is mounted with a semicircular arc detected piece that rotates integrally with the drive side hub 14, and the tip of the drive unit side sensor 17 is attached to the detected piece. It is attached to the fixed base 2 in a state of being close to the circumference. Then, every time the detected piece rotates integrally with the drive unit side hub 14 and the detected piece crosses immediately before the drive unit side sensor 17, a waveform signal is intermittently output from the drive unit side sensor 17.

したがって、双方のセンサ１６，１７から出力される波形信号を分析することにより、駆動部側ハブ１４と従動部側ハブ１５との間に設けられた摩擦板の滑り量を検出することができる。例えば、電動モータ１２が定速回転されている状態において、過負荷保護装置１１内に摩擦板による滑りがなく、駆動部側と従動部側とが１対１で回転していれば、双方のセンサ１６，１７から一定周期の波形信号が出力される。これに対して、過負荷が生じて過負荷保護装置１１内の摩擦板に滑りが発生すると、センサ１６，１７から出力される波形信号に大きな変動が発生し、あるいは、波形信号が出力されなくなる。このように、双方のセンサ１６，１７の波形信号の変化から後述する信号処理手段１８が過負荷状態の発生を検知することができる。   Therefore, by analyzing the waveform signals output from both the sensors 16, 17, it is possible to detect the slip amount of the friction plate provided between the drive unit side hub 14 and the driven unit side hub 15. For example, in a state where the electric motor 12 is rotating at a constant speed, if there is no slip due to the friction plate in the overload protection device 11 and the driving unit side and the driven unit side rotate one-to-one, both Waveform signals with a fixed period are output from the sensors 16 and 17. On the other hand, when an overload occurs and the friction plate in the overload protection device 11 slips, the waveform signals output from the sensors 16 and 17 vary greatly, or the waveform signals are not output. . In this way, the signal processing means 18 (to be described later) can detect the occurrence of an overload state from changes in the waveform signals of both sensors 16 and 17.

なお、センサ１６は、近接スイッチに限ることなく、リミットスイッチ、ロータリエンコーダ等を使用することも可能である。また、駆動部として電動モータ１２を使用しているが、油圧モータ、空圧モータ等、回転駆動力を持つものであれば何でもよい。   The sensor 16 is not limited to a proximity switch, and a limit switch, a rotary encoder, or the like can be used. Moreover, although the electric motor 12 is used as a drive part, what has a rotational drive force, such as a hydraulic motor and a pneumatic motor, may be used.

図５は攪拌ミキサ１の制御構成ブロック図であり、この制御系では信号処理手段１８を備え、該信号処理手段１８に前記電動モータ１２、従動部側センサ１６、駆動部側センサ１７が接続されている。信号処理手段１８は、高速演算処理を行う演算回路１９と、実行処理プログラムやセンサ１６，１７から検出信号に基づく回転累積量等のデータを格納するメモリ２０と、計時機能を有するタイマ２１とを具備している。   FIG. 5 is a control configuration block diagram of the agitating mixer 1, and this control system includes a signal processing unit 18, to which the electric motor 12, the driven unit side sensor 16, and the driving unit side sensor 17 are connected. ing. The signal processing means 18 includes an arithmetic circuit 19 for performing high-speed arithmetic processing, a memory 20 for storing data such as an execution processing program and a rotation accumulation amount based on detection signals from the sensors 16 and 17, and a timer 21 having a time measuring function. It has.

駆動モータ１２が回転して攪拌ミキサ１が駆動されると、過負荷保護装置１１の従動部側センサ１６と駆動側センサ１７から所定間隔の波形信号が信号処理手段１８に入力される。そして、異物の噛み込みなどによって設定トルク以上の過負荷状態になると、過負荷保護装置１１の摩擦板がスリップし始める。スリップが開始されると従動側センサ１６の検出信号の波形が変化して、前記信号処理手段１８は過負荷状態が発生したと判定し、駆動部に設けられている電動モータ１２の駆動を一旦停止する。   When the drive motor 12 rotates and the agitation mixer 1 is driven, waveform signals at predetermined intervals are input to the signal processing means 18 from the driven portion side sensor 16 and the drive side sensor 17 of the overload protection device 11. And when it becomes an overload state more than a setting torque by the biting of a foreign material etc., the friction plate of the overload protection apparatus 11 will begin to slip. When the slip is started, the waveform of the detection signal of the driven sensor 16 changes, and the signal processing means 18 determines that an overload condition has occurred, and once drives the electric motor 12 provided in the drive unit. Stop.

また、過負荷状態になって電動モータ１２の駆動を一旦停止すると同時に、信号処理手段１８がタイマ２１の計時をスタートさせ、所定の微小時間が経過した後に、再び電動モータ１２の駆動を開始する。この間に、攪拌ミキサの羽根と異物の噛み込み状態に変化が生じて過負荷が解消された場合は、通常の駆動状態に自動復帰させる。   In addition, the driving of the electric motor 12 is temporarily stopped due to an overload state, and at the same time, the signal processing means 18 starts the timer 21 and starts driving the electric motor 12 again after a predetermined minute time has elapsed. . During this time, when the blades of the agitating mixer and the foreign matter are caught in the state and the overload is eliminated, the normal driving state is automatically restored.

そして、スリップによって生じた駆動側と従動側の回転累積量の差から、信号処理演算手段１８が摩擦板の消耗度を検知する。そして、摩擦板の消耗度に基づいて、過負荷保護装置の初期設定を再設定する時期や摩擦板を新品に交換する時期を判定することができる。かくして、過負荷保護装置における初期設定の伝達トルクを最適な範囲に保持して、
土質改良機の保守管理性が向上できる。 Then, the signal processing calculation means 18 detects the degree of wear of the friction plate from the difference between the accumulated rotational amounts of the driving side and the driven side caused by the slip . Their to, on the basis of the degree of wear of the friction plates, the timing and friction plates to reconfigure the initial setting of the overload protection device can determine when to replace a new one. Thus, the initial set transmission torque in the overload protection device is kept within the optimum range
Maintainability of the soil improvement machine can be improved.

なお、本発明は、本発明の精神を逸脱しない限り種々の改変を為すことができ、そして、本発明が該改変されたものに及ぶことは当然である。   It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

本発明に係る土質改良機の撹拌ミキサの断面図。Sectional drawing of the stirring mixer of the soil improvement machine which concerns on this invention. 本発明の土質改良機の撹拌ミキサにおける羽根の拡大詳細図。The enlarged detail drawing of the blade | wing in the stirring mixer of the soil improvement machine of this invention. 本発明の土質改良機の撹拌ミキサにおける要部拡大詳細図。The principal part expansion detail drawing in the stirring mixer of the soil improvement machine of this invention. 本発明の土質改良機の撹拌ミキサにおけるセンサの配置状態の詳細図。The detailed figure of the arrangement | positioning state of the sensor in the stirring mixer of the soil improvement machine of this invention. 本発明の土質改良機の撹拌ミキサにおける制御構成ブロック図。The control block diagram in the stirring mixer of the soil improvement machine of this invention.

符号の説明Explanation of symbols

１ 攪拌ミキサ
６ 撹拌軸
７ 羽根
１１ 過負荷保護装置
１２ 電動モータ(駆動部)
１３ モータ軸
１４ 駆動側ハブ
１５ 従動側ハブ
１６ 従動側センサ
１７ 駆動側センサ
１８ 信号処理手段
１９ 演算回路
２０ メモリ
２１ タイマ
２３ 被検出片 1 Stirring Mixer 6 Stirring Shaft 7 Blade 11 Overload Protection Device 12 Electric Motor (Driver)
13 Motor shaft 14 Drive-side hub 15 Drive-side hub 16 Drive-side sensor 17 Drive-side sensor 18 Signal processing means 19 Arithmetic circuit 20 Memory 21 Timer
23 Detected piece

Claims (1)

羽根と一体に回転する撹拌軸を有する従動部と、前記撹拌軸に回転を付与する駆動部とを備え、前記羽根の回転により、土と土質改良剤を混合・撹拌処理する土質改良機の撹拌ミキサにおいて、
前記従動部と前記駆動部の間に過負荷保護装置を設け、軸トルクが所定値以上になって過負荷状態になると、前記過負荷保護装置に設けられた摩擦板で滑りを発生させるように構成し、
さらに、前記過負荷保護装置の駆動部側の回転状態を検出するセンサと、前記過負荷保護装置の従動部側の回転状態を検出するセンサを設け、
前記従動部側のセンサの検出信号に基づいて過負荷状態を検知するとともに、前記駆動部側および従動部側の双方のセンサの検出信号に基づいて求められる駆動部側および従動部側の夫々の回転累積量の差によって前記過負荷保護装置の摩擦板の消耗度を検知する信号処理手段を備えたことを特徴とする土質改良機の撹拌ミキサにおける異常検知装置。 Agitation of a soil improvement machine comprising a driven part having an agitation shaft that rotates integrally with a blade and a drive unit that imparts rotation to the agitation shaft, and mixing and stirring the soil and the soil conditioner by the rotation of the blade In the mixer,
An overload protection device is provided between the driven unit and the drive unit, and when the shaft torque becomes a predetermined value or more and an overload state is reached, a slip is generated by the friction plate provided in the overload protection device. Configure
Furthermore, a sensor for detecting the rotation state on the drive unit side of the overload protection device and a sensor for detecting the rotation state on the driven portion side of the overload protection device are provided,
While detecting an overload state based on the detection signal of the sensor on the driven unit side, each of the driving unit side and the driven unit side obtained based on the detection signals of the sensors on both the driving unit side and the driven unit side An abnormality detection device for a mixing mixer of a soil conditioner, comprising signal processing means for detecting a degree of wear of a friction plate of the overload protection device based on a difference in accumulated rotation amount .
JP2005300115A 2005-10-14 2005-10-14 Abnormality detection device in agitator mixer of soil improvement machine Expired - Fee Related JP4420291B2 (en)

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