JP4721807B2 - Hydraulic cylinder with operating frequency indicator - Google Patents

Hydraulic cylinder with operating frequency indicator Download PDF

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JP4721807B2
JP4721807B2 JP2005223776A JP2005223776A JP4721807B2 JP 4721807 B2 JP4721807 B2 JP 4721807B2 JP 2005223776 A JP2005223776 A JP 2005223776A JP 2005223776 A JP2005223776 A JP 2005223776A JP 4721807 B2 JP4721807 B2 JP 4721807B2
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rod
coil spring
hydraulic
counter
hydraulic cylinder
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JP2007040364A (en
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耕平 細井
達也 前村
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株式会社堀内機械
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Description

本発明は、金型等の移動対象物の駆動に使用する油圧シリンダに係り、特に油圧シリンダの稼動回数を表示する稼動回数表示器搭載の油圧シリンダに関するものである。   The present invention relates to a hydraulic cylinder used for driving a moving object such as a mold, and more particularly to a hydraulic cylinder equipped with an operation number display for displaying the number of operations of the hydraulic cylinder.

従来、図12から図14に示すカウンタ付き油圧式圧縮装置が知られている。図12及び図13において、送電用の線径の太い電線をスリーブを介して圧潰して接続するために使用する油圧式圧縮装置のシリンダキャップ54に、油圧感知器59と圧縮回数表示器60とからなるカウンタ61を一式として取り付けている。油圧感知器59は一対のダイスによって被圧縮材であるスリーブを圧縮毎にその作動油の所定油圧力を感知して信号を発するスイッチ装置であり、圧縮回数表示器60はその信号を受けてその計数を累積表示する液晶表示器であって、その外郭を抑える取付金具62の部分で、凹部に形成したシリンダキャップ54の底面の略中央部にボルト止めしてある。この圧縮回数表示器60とリード線63で電気接続された油圧感知器59はシリンダキャップ54の同じ底面の端部寄り位置に貫通状態で取り付けられ、一端のナット72の締め付けで固定されている。 Conventionally, a hydraulic compressor with a counter shown in FIGS. 12 to 14 is known. 12 and 13 , a hydraulic sensor 59, a compression number display 60, and a cylinder cap 54 of a hydraulic compression device used for crushing and connecting a thick electric wire for power transmission through a sleeve are connected. The counter 61 consisting of is attached as a set. The hydraulic pressure sensor 59 is a switch device that generates a signal by detecting a predetermined hydraulic pressure of the hydraulic oil every time the sleeve as the material to be compressed is compressed by a pair of dies, and the compression number indicator 60 receives the signal and It is a liquid crystal display for accumulatively displaying the count, and is bolted to the substantially central portion of the bottom surface of the cylinder cap 54 formed in the concave portion at the portion of the mounting bracket 62 that suppresses the outline. The hydraulic pressure sensor 59 that is electrically connected to the compression number display 60 and the lead wire 63 is attached in a penetrating position near the end of the same bottom surface of the cylinder cap 54 and is fixed by tightening a nut 72 at one end.

この油圧感知器59は、図14に示すように、感知器本体64内の基部(図示上部)にインナーシリンダ65を螺入し、このインナーシリンダ65内に摺動可能にピストン66を嵌挿させてある。ピストン66は基端側に開口するバネホルダ67に内装されたスプリング68に当接させ、基端側に付勢させてある。ピストン66の両端はロッドに形成し、基端側のロッド66aの端面はインナーシリンダ65と感知器本体64の細孔を通して下部油室の作動油に接触しており、先端側のロッド66bはその先端がバネホルダ67を貫いて僅かに外部に突出するようにしてある。 As shown in FIG. 14 , the hydraulic pressure sensor 59 has an inner cylinder 65 screwed into a base portion (upper part in the figure) in the sensor body 64, and a piston 66 is slidably inserted into the inner cylinder 65. It is. The piston 66 is brought into contact with a spring 68 housed in a spring holder 67 that opens to the base end side, and is biased to the base end side. Both ends of the piston 66 are formed as rods, and the end surface of the proximal end side rod 66a is in contact with the hydraulic oil in the lower oil chamber through the inner cylinder 65 and the pores of the sensor body 64, and the distal end side rod 66b is The tip is slightly protruded outside through the spring holder 67.

そして、ピストン66の先端側には、そのロッド66bに近接してネジ蓋69で抑えているスペーサ70を介してマイクロスイッチ71を保持してあり、下部油室の油圧力が、所定の圧力に達した時にピストン66がスプリング68の付勢力に抗して前進し、マイクロスイッチ71を押して信号を発するように設定してある。この信号を伝えるマイクロスイッチ71からのリード線63は感知器本体64に穿設した壁孔から外部に引き出すようにしてある。   A micro switch 71 is held on the front end side of the piston 66 via a spacer 70 which is held close to the rod 66b by a screw cover 69, so that the oil pressure in the lower oil chamber becomes a predetermined pressure. When it reaches, the piston 66 moves forward against the urging force of the spring 68, and the micro switch 71 is pressed to generate a signal. A lead wire 63 from the microswitch 71 for transmitting this signal is drawn out from a wall hole formed in the sensor body 64.

圧縮回数表示器60は、図12及び図13のように、ケース73とこのケース73に内装された液晶ユニット74とからなり、液晶ユニット74の表示窓75に表示される数字を読み取れるようになっている。そして、この液晶ユニット74は液晶板と共に半導体素子と電源としてリチウム電池とを内蔵している。なお、図13において52は油圧式圧縮装置のシリンダ、図14において53はラムである(例えば、特許文献1参照)。
特開平10−137985号 公報
As shown in FIGS. 12 and 13 , the compression number display unit 60 includes a case 73 and a liquid crystal unit 74 built in the case 73, and can read numbers displayed on the display window 75 of the liquid crystal unit 74. ing. The liquid crystal unit 74 includes a liquid crystal plate and a semiconductor element and a lithium battery as a power source. In FIG. 13 , 52 is a cylinder of the hydraulic compressor, and 53 in FIG. 14 is a ram (see, for example, Patent Document 1).
JP-A-10-137985

従来のカウンタ付き油圧式圧縮装置のカウンタは、油圧感知器59、マイクロスイッチ71、リード線63、液晶ユニット74、電池などを用いた電気式であるため、信頼性に欠けるという問題がある。
すなわち、油圧シリンダの稼動回数を累積カウントして所定稼動回数に達したとき、油圧シリンダの保守点検を行う必要があるが、従来の電気式カウンタでは電池の消耗状態を確実に把握することができず、電池切れでカウントができなくなり、保守点検の時期が分からなくなるという問題があった。また、電気式では、接点の接触不良などのトラブルも起こり易いという問題もあった。
Since the counter of the conventional hydraulic compressor with a counter is an electric type using a hydraulic pressure sensor 59, a micro switch 71, a lead wire 63, a liquid crystal unit 74, a battery, etc., there is a problem that reliability is lacking.
In other words, it is necessary to perform maintenance and inspection of the hydraulic cylinder when the number of operations of the hydraulic cylinder is cumulatively counted and reaches the predetermined number of operations, but the conventional electric counter can reliably grasp the battery consumption state. In other words, there was a problem that the count could not be performed due to the exhaustion of the battery, and the time for maintenance inspection was not known. In addition, the electric type has a problem that troubles such as contact failure of a contact are likely to occur.

本発明は、このような従来の構成が有していた問題を解決しようとするものであり、軸が所定角度往復運動することにより数字が一進する機械的機構と軸に直交して設けたカウンタレバーとを有する機械式カウンタを用いて信頼性の高い稼動回数の表示ができる油圧シリンダを実現することを目的とするものである。   The present invention is intended to solve the problem of such a conventional configuration, and is provided perpendicular to the shaft and a mechanical mechanism in which the number advances by reciprocating the shaft by a predetermined angle. An object of the present invention is to realize a hydraulic cylinder that can display the number of operations with high reliability by using a mechanical counter having a counter lever.

請求項1に係る本発明は、負荷に連結する油圧シリンダと、軸が所定角度往復運動することにより数字が1進する機械的機構と軸に直交して設けたカウンタレバーとを有する機械式カウンタと、油圧シリンダに付設するとともに油圧シリンダの油圧によりカウンタレバーを往き運動させるロッドとハウジングとを有するカウンタレバー駆動手段と、ロッドの往き運動時に弾性抵抗となるとともにロッドの還り運動をさせるコイルばねとを備え、ロッドに油圧が作用しない状態でのコイルばねの弾性力を調節可能な弾性力調節手段を備えるとともに、ロッドにかかる油圧の受圧面積がロッドの往き運動の位置に応じて大となる受圧面積増大手段を設けた稼動回数表示器搭載油圧シリンダである。 The present invention according to claim 1 is a mechanical counter having a hydraulic cylinder connected to a load, a mechanical mechanism in which a numeral is incremented by reciprocating a shaft by a predetermined angle, and a counter lever provided orthogonal to the shaft. And a counter lever driving means having a rod and a housing which are attached to the hydraulic cylinder and move the counter lever forward by the hydraulic pressure of the hydraulic cylinder, and a coil spring which provides elastic resistance and moves the rod back when the rod moves forward the provided, becomes larger in accordance with the adjustable Rutotomoni an elastic force adjustment means, the hydraulic pressure receiving area of the forward movement of the rod position according to the rod an elastic force of the coil spring in a state where the hydraulic pressure in the rod does not act This is a hydraulic cylinder equipped with an operation frequency indicator provided with a pressure receiving area increasing means .

請求項2に係る本発明は、請求項1に係る本発明の構成に加え、さらに、ハウジング内にロッドを囲むように圧縮コイルばねを設け、コイルばねの一端をロッドに当接させ、コイルばねの他端の位置を調節可能な取付け手段を介してハウジングに固定することにより弾性力調節手段とした稼動回数表示器搭載油圧シリンダである。   According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, a compression coil spring is provided so as to surround the rod in the housing, and one end of the coil spring is brought into contact with the rod, This is a hydraulic cylinder equipped with an operation number indicator that is used as an elastic force adjusting means by fixing it to the housing via an adjustable attaching means.

請求項3に係る本発明は、請求項1に係る本発明の構成に加え、さらに、一端をカウンタレバーに固定し他端をハウジングに固定した引張コイルばねをハウジング外に設け、コイルばねの一端および他端の少なくとも一方の位置を調節可能な取付け手段を介して固定することにより弾性力調節手段とした稼動回数表示器搭載油圧シリンダである。   According to a third aspect of the present invention, in addition to the configuration of the first aspect of the present invention, a tension coil spring having one end fixed to the counter lever and the other end fixed to the housing is provided outside the housing, and one end of the coil spring is provided. And a hydraulic cylinder equipped with an operation number indicator that is an elastic force adjusting means by fixing at least one position of the other end via an adjustable attaching means.

請求項1に係る本発明による作用は、軸が所定角度往復運動することにより数字が1進する機械的機構と軸に直交して設けたカウンタレバーとを有する機械式カウンタと、油圧シリンダに付設するとともに油圧シリンダの油圧によりカウンタレバーを往き運動させるロッドとハウジングとを有するカウンタレバー駆動手段と、ロッドの往き運動時に弾性抵抗となるとともにロッドの還り運動をさせるコイルばねとを備え、ロッドに油圧が作用しない状態でのコイルばねの弾性力を調節可能な弾性力調節手段としているから、信頼性の高い機械式カウンタを用いながら、油圧シリンダの稼動油圧に応じてコイルばねの弾性力を調節することができるので、油圧シリンダの稼動回数を確実に表示することができるとともに、ロッドにかかる油圧の受圧面積がロッドの往き運動の位置に応じて大となる受圧面積増大手段を設けたから、油圧シリンダの設定油圧が高いとき、ロッドの動きを緩衝することができる。 The operation of the present invention according to claim 1 is provided in a mechanical counter having a mechanical mechanism in which a numeral advances one by reciprocating a shaft by a predetermined angle and a counter lever provided orthogonal to the shaft, and a hydraulic cylinder. And a counter lever driving means having a rod and a housing that moves the counter lever forward by the hydraulic pressure of the hydraulic cylinder, and a coil spring that provides elastic resistance and moves the rod back when the rod moves forward. Since the elastic force adjusting means can adjust the elastic force of the coil spring in a state where no action is applied, the elastic force of the coil spring is adjusted according to the operating hydraulic pressure of the hydraulic cylinder while using a highly reliable mechanical counter. Therefore, the number of operations of the hydraulic cylinder can be displayed reliably, and the hydraulic pressure applied to the rod can be received. Since the pressure receiving area increasing means for increasing the pressure area according to the position of the forward movement of the rod is provided, the movement of the rod can be buffered when the set hydraulic pressure of the hydraulic cylinder is high.

請求項2に係る本発明の作用は、請求項1に係る本発明による作用に加え、ハウジング内にロッドを囲むように圧縮コイルばねを設け、コイルばねの一端をロッドに当接させ、コイルばねの他端の位置を調節可能な取付け手段を介してハウジングに固定することにより弾性力調節手段としたから、コイルばねを内蔵式にできる。   According to the second aspect of the present invention, in addition to the function of the first aspect of the present invention, a compression coil spring is provided so as to surround the rod in the housing, and one end of the coil spring is brought into contact with the rod. Since the elastic force adjusting means is fixed to the housing via an adjustable attaching means, the coil spring can be built-in.

請求項3に係る本発明の作用は、請求項1に係る本発明による作用に加え、一端をカウンタレバーに固定し他端をハウジングに固定した引張コイルばねをハウジング外に設け、コイルばねの一端および他端の少なくとも一方の位置を調節可能な取付け手段を介して固定することにより弾性力調節手段としたから、コイルばねを外装式にできる。   According to the third aspect of the present invention, in addition to the first aspect of the present invention, a tension coil spring having one end fixed to the counter lever and the other end fixed to the housing is provided outside the housing, and one end of the coil spring is provided. Since the elastic force adjusting means is fixed by fixing the position of at least one of the other end via an adjustable attaching means, the coil spring can be made an exterior type.

請求項1に係る本発明は、機械式カウンタを用い、ロッドの往き運動時に弾性抵抗となるとともにロッドの還り運動をさせるコイルばねとを備え、ロッドに油圧が作用しない状態でのコイルばねの弾性力を調節可能な弾性力調節手段を備えているから、電気式のように電池切れのない信頼性の高い機械式カウンタを用いながら、油圧シリンダの広範囲の油圧に対して、油圧シリンダの稼動回数を確実に表示することができるとともに、受圧面積増大手段を設けたから、油圧シリンダの設定油圧が高いとき、ロッドの動きを緩衝して、機械式カウンタのカウンタレバーに衝撃的な力がかかることを防止し、機械式カウンタの耐久性を向上できる。 The present invention according to claim 1 is provided with a coil spring that uses a mechanical counter and has an elastic resistance and a return movement of the rod during the forward movement of the rod, and the elasticity of the coil spring in a state where no hydraulic pressure acts on the rod. Since it is equipped with elastic force adjustment means that can adjust the force, the number of times the hydraulic cylinder is operated for a wide range of hydraulic pressures of the hydraulic cylinder while using a reliable mechanical counter that does not run out of batteries like the electric type Since the pressure receiving area increasing means is provided, when the set hydraulic pressure of the hydraulic cylinder is high, the rod movement is buffered and shock force is applied to the counter lever of the mechanical counter. And the durability of the mechanical counter can be improved.

請求項2に係る本発明は、請求項1に係る本発明の効果に加え、コイルばねを内蔵式にして、コイルばねの設置スペースを確保し易く、かつコイルばねの破損を防止することができる。   In addition to the effect of the present invention according to claim 1, the present invention according to claim 2 makes it possible to secure a space for installing the coil spring and to prevent the coil spring from being damaged by incorporating the coil spring. .

請求項3に係る本発明は、請求項1に係る本発明の効果に加え、コイルばねを外装式にしたから、コイルばねの弾性力調節手段の調節を簡単に行うことができるとともにカウンタレバー駆動手段の構造を簡単にできる。   According to the third aspect of the present invention, in addition to the effect of the present invention according to the first aspect, since the coil spring is of the exterior type, the adjustment of the elastic force adjusting means of the coil spring can be easily performed and the counter lever is driven. The structure of the means can be simplified.

以下、本発明の実施の形態を添付した図面により詳細に説明する。
図1から図11は、本発明の実施の形態を示す図であり、図1は以下の本発明の第一から第の実施の形態に係る稼動回数表示器搭載油圧シリンダが用いられる油圧回路の概略図である。図2から図6は第一の実施の形態を示す図面、図7は第二の実施の形態を示す図面、図8から図10は第三の実施の形態を示す図面、図11は油圧シリンダに作用する時間と油圧を示す図面である。
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 to FIG. 11 are diagrams showing an embodiment of the present invention. FIG. 1 is a hydraulic circuit in which a hydraulic cylinder equipped with an operation number indicator according to first to third embodiments of the present invention is used. FIG. 2 to 6 are drawings showing the first embodiment, FIG. 7 is a drawing showing the second embodiment, FIGS. 8 to 10 are drawings showing the third embodiment, and FIG. 11 is a hydraulic cylinder. It is drawing which shows the time and oil pressure which act on.

図1に基づいて、本発明に係る稼動回数表示器搭載油圧シリンダが用いられる概略の油圧回路を説明する。1は稼動回数表示器搭載油圧シリンダであり、金型などの負荷2を連結している。3は電動機4によって駆動される油ポンプである。5はリリーフ弁であり、油圧が設定圧力を超えると弁が開いて油タンク8に油を逃がすことにより負荷2にかかる力の上限を設定している。6は流量弁であり、油圧シリンダに1に供給する油量を設定している。7は方向切換弁であり、油ポンプ3による油圧シリンダ1への油の供給と油圧シリンダ1から油タンク8への油の還りとを切り替えて負荷2を稼動するのであり、油圧シリンダのピストンを挟んでシリンダの両端部に接続した油配管9,9を油ポンプ3の出口と油タンク8とに交互に切り替えるようにしている。   Based on FIG. 1, a schematic hydraulic circuit in which a hydraulic cylinder equipped with an operation number indicator according to the present invention is used will be described. Reference numeral 1 denotes a hydraulic cylinder equipped with an operation number indicator, which connects a load 2 such as a mold. An oil pump 3 is driven by the electric motor 4. Reference numeral 5 denotes a relief valve which sets an upper limit of the force applied to the load 2 by opening the valve when the hydraulic pressure exceeds a set pressure and allowing oil to escape to the oil tank 8. Reference numeral 6 denotes a flow valve, which sets the amount of oil supplied to the hydraulic cylinder 1. Reference numeral 7 denotes a direction switching valve which switches the supply of oil to the hydraulic cylinder 1 by the oil pump 3 and the return of oil from the hydraulic cylinder 1 to the oil tank 8 to operate the load 2. The oil pipes 9 and 9 connected to both ends of the cylinder are alternately switched between the outlet of the oil pump 3 and the oil tank 8.

図2から図6は本発明の第一の実施の形態を示す図面であり、図2は油圧ピストンに油圧が作用していない停止時の断面図、図3は図2のカウンタ周りの拡大断面図、図4は図2の側面図、図5は図4の平面図、図6は油圧ピストンに油圧が作用して油圧ピストンが作動途中のカウンタ周りの拡大断面図で図に対応する図面である。
これら図2から図6において、1は稼動回数表示器搭載油圧シリンダで、シリンダチューブ11、その内面を摺動するピストン12、ピストンロッド13、ブッシュ14、ロッドカバー15、押え板16、フロントカバー17を備えている。18はフロントカバー17に設けた油入口、19はロッドカバー15に設けた油出口、20はピストン12及びブッシュ14に設けたパッキンである。
2 to 6 are drawings showing a first embodiment of the present invention. FIG. 2 is a cross-sectional view when the hydraulic piston is not operating, and FIG. 3 is an enlarged cross-section around the counter of FIG. FIG, 4 is a side view of FIG. 2, FIG. 5 is a plan view of FIG. 4, FIG. 6 is drawing hydraulic piston hydraulic pressure acting on the hydraulic piston corresponding to FIG. 3 in an enlarged sectional view around the middle actuation counter It is.
2 to 6, reference numeral 1 denotes a hydraulic cylinder equipped with an operation number indicator, which is a cylinder tube 11, a piston 12 sliding on the inner surface thereof, a piston rod 13, a bush 14, a rod cover 15, a presser plate 16, and a front cover 17. It has. 18 is an oil inlet provided in the front cover 17, 19 is an oil outlet provided in the rod cover 15, and 20 is a packing provided in the piston 12 and the bush 14.

フロントカバー17には、機械式カウンタ21のカウンタレバー22を油圧シリンダ1の油圧により往き運動させるカウンタレバー駆動用のロッド32とハウジング33とを有するカウンタレバー駆動手段31を設けている。カウンタレバー駆動手段31及び機械式カウンタ21の詳細を図3に示している。   The front cover 17 is provided with a counter lever driving means 31 having a counter lever driving rod 32 and a housing 33 for moving the counter lever 22 of the mechanical counter 21 forward by the hydraulic pressure of the hydraulic cylinder 1. Details of the counter lever driving means 31 and the mechanical counter 21 are shown in FIG.

カウンタレバー駆動手段31は、フロントカバー17の一部に設けたハウジング33内にロッド32を囲むように圧縮コイルばね34を設け、ロッド32の下端に形成したピストン部35に油圧シリンダ1のピストン12に作用させる油圧を作用させて、圧縮コイルばね34の弾性力に抗してロッド32を往き運動させるのである。   The counter lever driving means 31 is provided with a compression coil spring 34 so as to surround the rod 32 in a housing 33 provided in a part of the front cover 17, and the piston 12 of the hydraulic cylinder 1 is formed on the piston portion 35 formed at the lower end of the rod 32. The rod 32 moves forward against the elastic force of the compression coil spring 34 by applying a hydraulic pressure acting on the rod 32.

圧縮コイルばね34の下端はロッド32に形成した膨出段部36の上面に当接させ、圧縮コイルばね34の上端はばね押えプレート37に設けた孔の内周に螺合するばね調整ねじ38の下端のフランジ及びばね押えプレート37の孔の内周により位置を規制している。ばね押えプレート37はばね調整ねじ38を螺合した状態で4本の六角穴付きボルト39でハウジング33に固定し、ばね調整ねじ38の上端の四角部をスパナ等で廻すことによりばね調整ねじ38の上下方向の位置を調整でき、この調整により圧縮コイルばね34の上端の位置を調節可能としている。   The lower end of the compression coil spring 34 is brought into contact with the upper surface of the bulging step 36 formed on the rod 32, and the upper end of the compression coil spring 34 is screwed into the inner periphery of the hole provided in the spring retainer plate 37. The position is regulated by the flange at the lower end of the spring and the inner periphery of the hole of the spring retainer plate 37. The spring retainer plate 37 is fixed to the housing 33 with four hexagon socket bolts 39 in a state where the spring adjustment screw 38 is screwed together, and the upper end of the spring adjustment screw 38 is turned with a spanner or the like to turn the spring adjustment screw 38. The position of the upper end of the compression coil spring 34 can be adjusted by this adjustment.

ばね調整ねじ38の中心部にはロッド32を貫通させる孔40を有している。41はばね調整ねじ38の上下方向の位置を調整した後、固定するロックナットである。ばね押えプレート37、六角穴付きボルト39、ばね調整ねじ38及びロックナット41により圧縮コイルばね34の他端の位置を調節可能な取付け手段としており、この調節可能な取付け手段を介して圧縮コイルばね34の他端をハウジング33に固定することにより圧縮コイルばね34の弾性力調節手段としている。なお、42はロッド32のピストン部35に設けたOリングである。   A hole 40 through which the rod 32 passes is provided at the center of the spring adjustment screw 38. Reference numeral 41 denotes a lock nut that is fixed after adjusting the vertical position of the spring adjusting screw 38. The spring holding plate 37, the hexagon socket head cap bolt 39, the spring adjusting screw 38, and the lock nut 41 serve as attachment means that can adjust the position of the other end of the compression coil spring 34, and the compression coil spring can be adjusted via this adjustable attachment means. By fixing the other end of 34 to the housing 33, elastic force adjusting means for the compression coil spring 34 is provided. Reference numeral 42 denotes an O-ring provided on the piston portion 35 of the rod 32.

機械式カウンタ21は、カウンタレバー駆動手段31のばね押えプレート37の上面に固定したカウンタ取付板23に4本のビス24で取り付けている。カウンタ取付板23はカウンタレバー駆動手段31のロッド32の位置とずらせて、図5及び図6に示すようにビス25で固定して、カウンタレバー22をロッド32の先端に当接させている。   The mechanical counter 21 is mounted with four screws 24 on a counter mounting plate 23 fixed to the upper surface of the spring pressing plate 37 of the counter lever driving means 31. The counter mounting plate 23 is shifted from the position of the rod 32 of the counter lever driving means 31 and is fixed with screws 25 as shown in FIGS. 5 and 6, and the counter lever 22 is brought into contact with the tip of the rod 32.

機械式カウンタ21は、市販品であって、カウント数を視認するための透明窓26を設けたケーシング27内に、軸28にそれぞれ回転自在に軸支されその外周面に数字が表示されているつの数字歯車29、桁上げ歯車、ゼロ復帰摘み30に連結された5つの数字歯車をゼロ復帰させる機構、ラチェット機構、軸復帰機構などを備えており、軸28が所定角度(この実施形態では45度)往復運動することにより、数字が一進する機械的機構を構成している。 The mechanical counter 21 is a commercial product, and is rotatably supported by a shaft 28 in a casing 27 provided with a transparent window 26 for visually recognizing the count number, and numerals are displayed on the outer peripheral surface thereof. There are provided six number gears 29, a carry gear, a mechanism for returning the five number gears connected to the zero return knob 30 to zero, a ratchet mechanism, a shaft return mechanism, etc., and the shaft 28 has a predetermined angle (in this embodiment, (45 degrees) By reciprocating, it constitutes a mechanical mechanism that advances numbers.

機械式カウンタ21の軸28に直交して設けたカウンタレバー22をロッド32の先端で図3の状態から図6の状態に押上げて軸28を所定角度(45度)往き運動させ、図1に示す方向切替弁7の切替により、ロッド32のピストン部35にかかる油圧が油タンク8の大気圧に戻ると圧縮コイルばね34の弾性力によりロッド32が還り運動を行い、カウンタレバー22は機械式カウンタ21の内部に設けられたばねによる軸復帰機構により、図3の状態となり、カウント数を一進するのである。このようにして、機械式カウンタ21により油圧シリンダ1の稼動回数を機械的にカウントするのである。   The counter lever 22 provided perpendicular to the shaft 28 of the mechanical counter 21 is pushed up from the state of FIG. 3 to the state of FIG. 6 by the tip of the rod 32 to move the shaft 28 forward and forward by a predetermined angle (45 degrees). When the hydraulic pressure applied to the piston portion 35 of the rod 32 returns to the atmospheric pressure of the oil tank 8 by the switching of the direction switching valve 7 shown in FIG. 3, the rod 32 performs a return motion by the elastic force of the compression coil spring 34, and the counter lever 22 The state shown in FIG. 3 is obtained by a shaft return mechanism using a spring provided inside the expression counter 21, and the count number is incremented by one. In this way, the number of operations of the hydraulic cylinder 1 is mechanically counted by the mechanical counter 21.

カウンタレバー22を押上げるロッド32を上方に動かすピストン部35に作用する油圧は油圧シリンダ1に作用する油圧と同じ圧力であり、油圧シリンダ1の仕様として許容使用範囲が定められており、負荷2の特性に基づくリリーフ弁5の設定によって実際に使用する油圧は負荷2により異なる。そして、図11に示すように、油圧シリンダ1に作用する油圧は方向切替弁7が負荷2を駆動する方向に切替えられてからの経過時間T1で油圧シリンダ1のピストン12が動き始める初動油圧P1となり、経過時間T2でピストン12が定常移動する移動油圧P2となり、経過時間T3でピストン12が停止し、経過時間T4でリリーフ弁5が開き、設定油圧P3となる。 The hydraulic pressure acting on the piston portion 35 that moves the rod 32 that pushes up the counter lever 22 upward is the same pressure as the hydraulic pressure acting on the hydraulic cylinder 1, and the allowable use range is determined as the specification of the hydraulic cylinder 1. The hydraulic pressure that is actually used varies depending on the load 2 depending on the setting of the relief valve 5 based on the above characteristics. As shown in FIG. 11 , the hydraulic pressure acting on the hydraulic cylinder 1 is the initial hydraulic pressure P1 at which the piston 12 of the hydraulic cylinder 1 starts to move at an elapsed time T1 after the direction switching valve 7 is switched in the direction in which the load 2 is driven. Then, at the elapsed time T2, the hydraulic pressure P2 at which the piston 12 moves steadily is reached, the piston 12 stops at the elapsed time T3, the relief valve 5 is opened at the elapsed time T4, and the set hydraulic pressure P3 is reached.

これらの初動油圧P1、移動油圧P2及び設定油圧P3は、負荷2の特性によって決まり、ロッド32のピストン部35に作用してカウンタレバー22をロッド32で押上げるのであり、この押上げ力に対抗するように圧縮コイルばね34が作用している。圧縮コイルばね34の対抗力(弾性力)は、負荷2の特性により定まる例えば初動油圧P1の大きさ及び設定油圧P3の大きさに応じて変えることが、工程中の圧力変化でロッド32が上昇下降運動して誤カウントしたり設定油圧P3によりカウンタレバー22に過大な力が作用したりしないようにするために望ましい。
特に、工程中に圧力変化が生ずると、初動油圧P1でロッド32が上昇運動し移動油圧P2でロッド32が下降して、カウンタレバー22により軸28が所定角度往復運動して機械式カウンタ21がカウントすることが生ずることがあるが、このような誤カウントが生じないように、圧縮コイルばね34の対抗力は初動油圧P1でロッド32が上昇運動しないように設定して、機械式カウンタ21の誤作動を防止することが望ましい。
The initial hydraulic pressure P1, the moving hydraulic pressure P2, and the set hydraulic pressure P3 are determined by the characteristics of the load 2, and act on the piston portion 35 of the rod 32 to push up the counter lever 22 by the rod 32. Thus, the compression coil spring 34 is acting. The counter force (elastic force) of the compression coil spring 34 is determined by the characteristics of the load 2, for example, depending on the magnitude of the initial hydraulic pressure P1 and the set hydraulic pressure P3. This is desirable in order to prevent the counter lever 22 from being erroneously counted due to a downward movement or an excessive force acting on the counter lever 22 by the set hydraulic pressure P3.
In particular, if a pressure change occurs during the process, the rod 32 moves upward by the initial hydraulic pressure P1, the rod 32 moves downward by the moving hydraulic pressure P2, and the shaft 28 is reciprocated by a predetermined angle by the counter lever 22, whereby the mechanical counter 21 is moved. The counter force of the compression coil spring 34 is set so that the rod 32 does not move upward at the initial hydraulic pressure P1 so that such erroneous counting does not occur. It is desirable to prevent malfunction.

そこで、本発明の第一の実施の形態では、ばね押えプレート37、六角穴付きボルト39、ばね調整ねじ38及びロックナット41により、コイルばね34の他端の位置を調節可能な取付け手段としており、この取付け手段により圧縮コイルばね34の弾性力調節手段を構成して圧縮コイルばね34の他端の位置を調節することにより、ロッド32のピストン部35に油圧が作用しない状態での圧縮コイルばね34の弾性力を調節するのである。例えば、初動油圧P1でロッド32が上昇運動して誤カウントしないように、圧縮コイルばね34の他端が下方に位置するようにばね調整ねじ38を調整して圧縮コイルばね34の弾性力を大きく調整し、設定油圧P3が小さい場合は、設定油圧P3で確実にロッド32が上昇運動してカウントできるよう圧縮コイルばね34の他端が上方に位置するようにばね調整ねじ38を調整して圧縮コイルばね34の弾性力を小さく調整するのである。   Therefore, in the first embodiment of the present invention, the spring holding plate 37, the hexagon socket head cap bolt 39, the spring adjusting screw 38, and the lock nut 41 are used as attachment means capable of adjusting the position of the other end of the coil spring 34. The mounting means constitutes an elastic force adjusting means for the compression coil spring 34, and the position of the other end of the compression coil spring 34 is adjusted, whereby the compression coil spring in a state where no hydraulic pressure is applied to the piston portion 35 of the rod 32. The elastic force of 34 is adjusted. For example, the spring adjustment screw 38 is adjusted so that the other end of the compression coil spring 34 is positioned downward so that the rod 32 does not move up due to the upward movement of the rod 32 at the initial hydraulic pressure P1, thereby increasing the elastic force of the compression coil spring 34. If the set hydraulic pressure P3 is small, the spring 32 is adjusted by adjusting the spring adjustment screw 38 so that the other end of the compression coil spring 34 is positioned upward so that the rod 32 can be moved up and counted reliably at the set hydraulic pressure P3. The elastic force of the coil spring 34 is adjusted to be small.

圧縮コイルばね34の弾性力及びロッド32の押上げ力は、油圧シリンダ1の許容使用範囲の下限における油圧で圧縮コイルばね34の弾性力に抗してロッド32によりカウンタレバー22を押上げることができ、かつ圧縮コイルばね34の弾性力でロッド32を還り運動させる大きさにするのであり、圧縮コイルばね34のばね定数とロッド32のピストン部35の受圧面積を適宜設計すればよい。また、油圧シリンダ1の許容使用範囲の上限における初動油圧P1でロッド32が上昇運動しないように、圧縮コイルばね34の弾性力の調節範囲を決定するのである。   The elastic force of the compression coil spring 34 and the pushing force of the rod 32 can push up the counter lever 22 by the rod 32 against the elastic force of the compression coil spring 34 at the lower limit of the allowable use range of the hydraulic cylinder 1. The rod 32 can be returned and moved by the elastic force of the compression coil spring 34, and the spring constant of the compression coil spring 34 and the pressure receiving area of the piston portion 35 of the rod 32 may be appropriately designed. Further, the adjustment range of the elastic force of the compression coil spring 34 is determined so that the rod 32 does not move upward at the initial hydraulic pressure P1 at the upper limit of the allowable use range of the hydraulic cylinder 1.

さらに、ロッド32のピストン部35の受圧面積がロッド32の上昇位置に応じて段階的に大きくなるようにしている。Further, the pressure receiving area of the piston portion 35 of the rod 32 is made to increase stepwise in accordance with the rising position of the rod 32.
ロッド32のピストン部35は下方から一段目が径D1、受圧面A1、2段目が径D2、受圧面A2、3段目が径D3、受圧面A3とし、受圧面A2に連通する2段目連通路50と受圧面A3に連通する3段目連通路51とをロッド32の上昇位置に対応させて設けている。The piston portion 35 of the rod 32 has a diameter D1 from the bottom, a pressure receiving surface A1, a diameter D2 from the first step, a pressure receiving surface A2, a diameter D3 from the third step, a pressure receiving surface A3, and a second step communicating with the pressure receiving surface A2. The third communication path 51 communicating with the second communication path 50 and the pressure receiving surface A3 is provided in correspondence with the ascending position of the rod 32.

図2及び図3は油圧がロッド32のピストン部35の受圧面A1にのみ作用可能な状態を示しており、ロッド32が下限位置にある状態を示している。図6はロッド32が上昇途中でピストン部35の受圧面A2にも油圧が作用している状態を示しており、受圧面A1及び受圧面A2の両方に油圧が作用している。図示を省略するが、ロッド32がさらに上昇すると受圧面A3にも油圧が作用する。2 and 3 show a state where the hydraulic pressure can act only on the pressure receiving surface A1 of the piston portion 35 of the rod 32, and shows a state where the rod 32 is at the lower limit position. FIG. 6 shows a state in which the oil pressure is also acting on the pressure receiving surface A2 of the piston portion 35 while the rod 32 is moving up, and the oil pressure is acting on both the pressure receiving surface A1 and the pressure receiving surface A2. Although illustration is omitted, when the rod 32 further rises, the hydraulic pressure also acts on the pressure receiving surface A3.

このように、ロッド32の上昇位置に対応させて、ピストン部35の受圧面積を段階的に大きくなるようにして、油圧が衝撃的にピストン部35及びカウンタレバー22に作用しないようにしている。そして、ピストン部35の段階的な径D2,D3、受圧面A2,A3の増大と2段目及び3段目の連通路50,51により受圧面積増大手段を構成している。In this way, the pressure receiving area of the piston portion 35 is increased stepwise in correspondence with the ascending position of the rod 32 so that the hydraulic pressure does not impact the piston portion 35 and the counter lever 22 in an impact manner. The stepped diameters D2 and D3 of the piston portion 35, the pressure receiving surfaces A2 and A3, and the second and third communication paths 50 and 51 constitute pressure receiving area increasing means.

次に、本発明の第二の実施の形態を図7に基づいて説明する。図7は油圧ピストンに油圧が作用していない停止時のカウンタ周りの拡大断面図である。この第二の実施の形態は、第一の実施の形態における圧縮コイルばね34の他端の位置を調節可能な取付け手段として、ばね押えプレート37、六角穴付きボルト39、ばね調整ねじ38及びロックナット41により構成したが、ばね調整ねじ38及びロックナット41を省略して、これに代わりばね調整シム43を用いるのである。   Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 7 is an enlarged cross-sectional view around the counter when the hydraulic piston does not act on the hydraulic piston. In the second embodiment, as a mounting means capable of adjusting the position of the other end of the compression coil spring 34 in the first embodiment, a spring holding plate 37, a hexagon socket head bolt 39, a spring adjusting screw 38 and a lock are provided. Although constituted by the nut 41, the spring adjustment screw 38 and the lock nut 41 are omitted, and a spring adjustment shim 43 is used instead.

圧縮コイルばね34の他端(上端)の位置はばね押えプレート37に形成した凹部により規制しており、ばね押えプレート37にはロッド32の先端部が貫通する孔を備えている。そして、圧縮コイルばね34の他端の位置の調整は、ばね調整シム43の枚数、厚みを適宜組合せて行うのである。なお、この第二の実施の形態は、上記以外については第一の実施の形態で説明したとおりであるから、説明を省略する。   The position of the other end (upper end) of the compression coil spring 34 is regulated by a recess formed in the spring retainer plate 37, and the spring retainer plate 37 has a hole through which the distal end portion of the rod 32 passes. The position of the other end of the compression coil spring 34 is adjusted by appropriately combining the number and thickness of the spring adjustment shims 43. Since the second embodiment is the same as described in the first embodiment except for the above, the description thereof is omitted.

図8から図10は本発明の第三の実施の形態を示す図面であり、図8は油圧ピストンに油圧が作用していない停止時の断面図、図9は図8のカウンタ周りの拡大断面図、図10は油圧ピストンに油圧が作用して油圧ピストンが作動途中の断面図で図8に対応する図面である。図8から図10に基づいて第三の実施の形態を説明する。   8 to 10 are drawings showing a third embodiment of the present invention. FIG. 8 is a cross-sectional view when the hydraulic piston is not operating, and FIG. 9 is an enlarged cross-section around the counter of FIG. FIG. 10 and FIG. 10 are sectional views corresponding to FIG. 8, which are cross-sectional views in the middle of operation of the hydraulic piston when the hydraulic pressure acts on the hydraulic piston. A third embodiment will be described with reference to FIGS.

第三の実施の形態は、引張コイルばね44を用い、引張コイルばね44をカウンタレバー駆動手段31のハウジング33の外側に設けた点で、第一及び第二の実施の形態と異なっており、この相違点について説明し、それ以外については説明を省略する。
ロッド32はハウジング33に設けたブッシュ45を介して設けており、ロッド32の中間部分及びブッシュ45の外周面にはそれぞれOリング46,47を設けている。この実施の形態ではロッド32のピストン部35にはOリングを設けていない。
The third embodiment is different from the first and second embodiments in that a tension coil spring 44 is used and the tension coil spring 44 is provided outside the housing 33 of the counter lever driving means 31. This difference will be described, and the description of other points will be omitted.
The rod 32 is provided via a bush 45 provided on the housing 33, and O-rings 46 and 47 are provided on an intermediate portion of the rod 32 and an outer peripheral surface of the bush 45, respectively. In this embodiment, the piston portion 35 of the rod 32 is not provided with an O-ring.

引張コイルばね44の一端はカウンタレバー22の端部に固定し、引張コイルばね44の他端はハウジング33にねじにより埋め込み深さを調節可能としたばね調整フック48に固定している。そして、ばね調整フック48の埋め込み深さを調節して、ロックナット49でその位置に固定するのである。   One end of the tension coil spring 44 is fixed to the end portion of the counter lever 22, and the other end of the tension coil spring 44 is fixed to a spring adjustment hook 48 whose depth of embedding can be adjusted in the housing 33 with a screw. Then, the embedding depth of the spring adjustment hook 48 is adjusted and fixed at that position by the lock nut 49.

ばね調整フック48及びロックナット49が引張コイルばね44の他端の位置を調節可能な取付け手段としており、この調節可能な取付け手段を介して引張コイルばね44の他端をハウジング33に固定することにより引張コイルばね44の弾性力調節手段としている。ロッド32に油圧が作用しない状態での引張コイルばね44の弾性力を調節可能とする技術的意義は第一の実施の形態で説明したと同様であるので説明を省略する。   The spring adjusting hook 48 and the lock nut 49 serve as attachment means that can adjust the position of the other end of the tension coil spring 44, and the other end of the tension coil spring 44 is fixed to the housing 33 through this adjustable attachment means. Thus, the elastic force adjusting means of the tension coil spring 44 is provided. The technical significance of making it possible to adjust the elastic force of the tension coil spring 44 in a state where no hydraulic pressure acts on the rod 32 is the same as that described in the first embodiment, and thus the description thereof is omitted.

上記の実施の形態では、引張コイルばね44の他端の位置を調節可能としたが、引張コイルばね44の一端の位置を調節可能としてもよく、両端を調節可能としてもよい。   In the above embodiment, the position of the other end of the tension coil spring 44 can be adjusted. However, the position of one end of the tension coil spring 44 may be adjustable, and both ends may be adjustable.

以上説明した第一から第の実施の形態では、ロッド32の軸心が上下方向に動くように設けたが、ロッド32の軸心が左右方向に動くように設けてもよい。また、カウンタレバー駆動手段31をフロントカバー17に内蔵させたが、フロントカバー17とは別に油圧シリンダ1にハウジングを付設するとともに油圧シリンダ1に作用する油圧を導くようにすることもできる。 In the first to third embodiments described above, the shaft center of the rod 32 is provided so as to move in the vertical direction, but the shaft center of the rod 32 may be provided so as to move in the left-right direction. Although the counter lever driving means 31 is built in the front cover 17, a housing can be attached to the hydraulic cylinder 1 separately from the front cover 17 and the hydraulic pressure acting on the hydraulic cylinder 1 can be guided.

本発明の実施の形態に係る概略油圧回路図。1 is a schematic hydraulic circuit diagram according to an embodiment of the present invention. 本発明の第一の実施の形態に係る断面図。Sectional drawing which concerns on 1st embodiment of this invention. 図2のカウンタ周りの拡大断面図。The expanded sectional view around the counter of FIG. 図2の側面図。The side view of FIG. 図4の平面図。The top view of FIG. 油圧ピストンが作動途中のカウンタ周りの拡大断面図で図に対応する図面。FIG. 4 is an enlarged cross-sectional view around the counter during operation of the hydraulic piston, corresponding to FIG. 3 . 本発明の第二の実施の形態に係るカウンタ回りの拡大断面図。The expanded sectional view around the counter which concerns on 2nd embodiment of this invention. 本発明の第三の実施の形態に係る断面図。Sectional drawing which concerns on 3rd embodiment of this invention. 図8のカウンタ周りの拡大断面図。FIG. 9 is an enlarged cross-sectional view around the counter of FIG. 8. 油圧ピストンが作動途中の断面図で図8に対応する図面。FIG. 9 is a cross-sectional view of the hydraulic piston during operation, corresponding to FIG. 8. 経過時間と油圧とを示す説明図。Explanatory drawing which shows elapsed time and oil_pressure | hydraulic. 従来例に係る油圧式圧縮装置の底面図。The bottom view of the hydraulic compression apparatus which concerns on a prior art example. 従来例に係る油圧式圧縮装置におけるシリンダキャップの側面断面図。Side surface sectional drawing of the cylinder cap in the hydraulic compression apparatus which concerns on a prior art example. 従来例に係る油圧式圧縮装置における油圧式感知器の側面断面図。Side surface sectional drawing of the hydraulic sensor in the hydraulic compressor which concerns on a prior art example.

1 油圧シリンダ
2 負荷
21 機械式カウンタ
22 カウンタレバー
28 軸
32 ロッド
33 ハウジング
34 圧縮コイルばね
44 引張コイルばね
DESCRIPTION OF SYMBOLS 1 Hydraulic cylinder 2 Load 21 Mechanical counter 22 Counter lever 28 Shaft 32 Rod 33 Housing 34 Compression coil spring 44 Extension coil spring

Claims (3)

負荷に連結する油圧シリンダと、軸が所定角度往復運動することにより数字が1進する機械的機構と軸に直交して設けたカウンタレバーとを有する機械式カウンタと、油圧シリンダに付設するとともに油圧シリンダの油圧によりカウンタレバーを往き運動させるロッドとハウジングとを有するカウンタレバー駆動手段と、ロッドの往き運動時に弾性抵抗となるとともにロッドの還り運動をさせるコイルばねとを備え、ロッドに油圧が作用しない状態でのコイルばねの弾性力を調節可能な弾性力調節手段とを備えるとともに、ロッドにかかる油圧の受圧面積がロッドの往き運動の位置に応じて大となる受圧面積増大手段を設けたことを特徴とする稼動回数表示器搭載油圧シリンダ。 A hydraulic counter connected to the load, a mechanical counter having a mechanical mechanism in which the number is incremented by reciprocating the shaft by a predetermined angle, and a counter lever provided orthogonal to the shaft, and a hydraulic counter attached to the hydraulic cylinder and hydraulic pressure A counter lever drive means having a rod and a housing for moving the counter lever forward by the hydraulic pressure of the cylinder, and a coil spring that provides elastic resistance and a return movement of the rod during the forward movement of the rod, so that the hydraulic pressure does not act on the rod it Rutotomoni a adjustable elastic force adjustment means an elastic force of the coil spring in the state, the hydraulic pressure receiving area according to the rod is provided with a pressure receiving area increasing means comprising a large depending on the position of the forward movement of the rod A hydraulic cylinder equipped with an operation frequency indicator. ハウジング内にロッドを囲むように圧縮コイルばねを設け、コイルばねの一端をロッドに当接させ、コイルばねの他端の位置を調節可能な取付け手段を介してハウジングに固定することにより弾性力調節手段としたことを特徴とする請求項1に記載の稼動回数表示器搭載油圧シリンダ。   A compression coil spring is provided so as to surround the rod in the housing, one end of the coil spring is brought into contact with the rod, and the elastic force is adjusted by fixing the other end of the coil spring to the housing through an adjustable mounting means. The hydraulic cylinder equipped with an operation number display device according to claim 1, wherein the hydraulic cylinder is a means. 一端をカウンタレバーに固定し他端をハウジングに固定した引張コイルばねをハウジング外に設け、コイルばねの一端および他端の少なくとも一方の位置を調節可能な取付け手段を介して固定することにより弾性力調節手段としたことを特徴とする請求項1に記載の稼動回数表示器搭載油圧シリンダ。   A tension coil spring with one end fixed to the counter lever and the other end fixed to the housing is provided outside the housing, and is fixed by means of an attachment means that can adjust the position of at least one of the one end and the other end of the coil spring. The hydraulic cylinder equipped with an operation number indicator according to claim 1, wherein the hydraulic cylinder is an adjusting means.
JP2005223776A 2005-08-02 2005-08-02 Hydraulic cylinder with operating frequency indicator Expired - Fee Related JP4721807B2 (en)

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