JPH065357Y2 - Suspended chain abnormality detection device in lifting device - Google Patents
Suspended chain abnormality detection device in lifting deviceInfo
- Publication number
- JPH065357Y2 JPH065357Y2 JP7346788U JP7346788U JPH065357Y2 JP H065357 Y2 JPH065357 Y2 JP H065357Y2 JP 7346788 U JP7346788 U JP 7346788U JP 7346788 U JP7346788 U JP 7346788U JP H065357 Y2 JPH065357 Y2 JP H065357Y2
- Authority
- JP
- Japan
- Prior art keywords
- lifting
- chain
- sprocket
- suspension
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Warehouses Or Storage Devices (AREA)
- Forklifts And Lifting Vehicles (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、昇降装置における吊りチェーンの異常を検出
する装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a device for detecting an abnormality of a suspension chain in a lifting device.
〔従来の技術〕 スプロケットをスプリングその他で引張り常にチェーン
に一定のテンションをおけておき、下降時昇降台が周囲
の物（ラック等）又はマスト等に引っかかり下降不可と
なるような現象が起きるとテンションのかかったスプロ
ケット位置がチェーンたるみによってずれ、そのずれ量
をセンサにて検出し異常（引っかかり）として出力して
いた。[Prior Art] When the sprocket is pulled by a spring or the like, a constant tension is always applied to the chain. The broken sprocket position was shifted due to chain slack, and the amount of deviation was detected by a sensor and output as an abnormality (clogging).
しかし、その検出する為の機構が複雑でかつコスト高と
なっていた。However, the mechanism for the detection is complicated and the cost is high.
本考案は上記の事情に鑑みなされたものであって、その
目的とするところは吊りチェーンの異常の検出において
従来装置の複雑な機構を全て取除いて電気的に処理しロ
ーコスト化無接点化を図ることができる昇降装置におけ
る吊りチェーン異常検出装置を提供することにある。The present invention has been made in view of the above circumstances, and an object thereof is to remove all the complicated mechanism of the conventional device and electrically process it for detecting abnormalities of the suspension chain to reduce the cost and make the contactless. An object of the present invention is to provide a hanging chain abnormality detection device in a lifting device that can be achieved.
上記の目的を達成するために本考案は、昇降台に軸支さ
れた吊持用スプロケットに吊りチェーンを掛けて、この
吊りチェーンの移動により昇降台を昇降させる昇降装置
において、昇降台に吊持方スプロケットの歯数を検出し
てパルス信号として出力する近接スイッチを設け、近接
スイッチの出力信号と前記吊りチェーンの駆動用のモー
タの出力信号とを元に処理回路により吊りチェーンの異
常を検出するようにした。In order to achieve the above object, the present invention relates to a lifting device in which a hanging chain is hung on a lifting sprocket pivotally supported on a lifting table and the lifting chain is moved up and down to lift the lifting chain. A proximity switch that detects the number of teeth of the one-sided sprocket and outputs it as a pulse signal is provided, and the processing circuit detects an abnormality of the suspension chain based on the output signal of the proximity switch and the output signal of the motor for driving the suspension chain. I did it.
前記処理回路において、例えば最低速時に発するパルス
数よりも多い場合を吊持用スプロケットの回転状態と
し、それによりも少ない場合を吊持用スプロケットの空
転状態とし、またパルス数が発生しない場合を吊持用ス
プロケットの停止状態とする処理を行うと共に、モータ
への昇降信号出力を監視する。In the processing circuit, for example, when the number of pulses generated at the lowest speed is greater than the rotating state of the suspension sprocket, when less than that is the idle state of the suspension sprocket, and when the number of pulses is not generated, the suspension is performed. The holding sprocket is brought to a stopped state, and the elevation signal output to the motor is monitored.
以下、本考案の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図は昇降装置の正面を示し、この昇降装置は車輪１
を有する門形の装置本体２を備えており、この装置本体
２の側部メンバー３には支持体４が固設してあり、この
支持体４に昇降用モータ５が支持されている。FIG. 1 shows the front of the lifting device, which is a wheel 1
1 is provided with a portal-shaped device main body 2, and a support member 4 is fixed to a side member 3 of the device main body 2, and a lifting motor 5 is supported on the support member 4.
支持体４には駆動用スプロケット６，６′が、また側部
メンバー３には中間スプロケット７，７′が、更には装
置本体２の上部メンバー８には吊下用スプロケット９，
１０がそれぞれ軸支してある。The support 4 has drive sprockets 6, 6 ', the side members 3 have intermediate sprockets 7, 7', and the upper member 8 of the apparatus body 2 has suspension sprockets 9, 6.
10 are pivotally supported.
第１図中１１は昇降台であり、この昇降台１１の左、右
側メンバー１２，１３の上端部にはブラケット１４，１
５が固着してあり、これらブラケット１４，１５は吊持
用スプロケット１６，１７が軸支してある。Reference numeral 11 in FIG. 1 is an elevator, and brackets 14, 1 are provided on the upper ends of the left and right members 12, 13 of the elevator 11.
5 are fixed, and the brackets 14 and 15 are rotatably supported by hanging sprockets 16 and 17, respectively.
前記駆動用スプロケット６は昇降用モータ５により正逆
回転されるものである。The drive sprocket 6 is normally and reversely rotated by the lifting motor 5.
そして、前記上部メンバー８には左右の吊りチェーン２
６，２７のそれぞれの一端部が係止してあり、左の吊り
チェーン２６は左の吊持用スプロケット１６、左の吊下
用スプロケット９、右の吊下用スプロケット１０と同軸
のスプロケット１０′、中間スプロケット７′及び駆動
用スプロケット６′に掛けてある。The left and right suspension chains 2 are attached to the upper member 8.
One end of each of 6, 6 and 27 is locked, and the left suspension chain 26 includes a left suspension sprocket 16, a left suspension sprocket 9, a right suspension sprocket 10 and a coaxial sprocket 10 ′. , The intermediate sprocket 7'and the drive sprocket 6 '.
また、右の吊りチェーン２７は右の吊下用スプロケット
１０、中間スプロケット７及び駆動用スプロケット６に
掛けてある。The right suspension chain 27 is hung on the right suspension sprocket 10, the intermediate sprocket 7, and the drive sprocket 6.
前記昇降台１のブラケット１４，１５の上面部には近接
スイッチ１８，１９が固着してある。Proximity switches 18 and 19 are fixed to the upper surfaces of the brackets 14 and 15 of the lift 1.
左右の近接スイッチ１８，１９が検出するスプロケット
信号イ，ロ及び昇降用モータ５のモータ信号ハは第４図
に示す論理回路より成る処理回路Ａに入力される。この
処理回路Ａは左右のフリップフロップ回路２０，２１、
ＯＲ回路２２、ＡＮＤ回路２３、ＮＯＲ回路２４及びＯ
Ｒ回路２５から成る。The sprocket signals a and b detected by the left and right proximity switches 18 and 19 and the motor signal c of the lifting motor 5 are input to a processing circuit A including a logic circuit shown in FIG. This processing circuit A includes left and right flip-flop circuits 20, 21,
OR circuit 22, AND circuit 23, NOR circuit 24 and O
It comprises an R circuit 25.
前記近接スイッチ１８，１９のスプロケット回転信号
イ，ロは吊持用スプロケット１６，１７の回転をパルス
数として検出して出力されるものであり、前記処理回路
Ａでは、最低速時に発するパルス数より多い場合を吊持
用スプロケット１６，１７の回転状態とし、それよりも
少い場合を吊持用スプロケット１６，１７の空転状態と
し、またパルス数が発生しない場合を吊持用スプロケッ
ト１６，１７の停止状態とする処理を行うと共に、前記
昇降用モータ５への昇降信号出力（モータ信号ハ）を監
視する。The sprocket rotation signals a and b of the proximity switches 18 and 19 are output by detecting the rotation of the suspension sprockets 16 and 17 as the number of pulses. In the processing circuit A, the number of pulses generated at the lowest speed is used. When the number is large, the suspension sprockets 16 and 17 are rotated. When the number is smaller than that, the suspension sprockets 16 and 17 are idle. When the number of pulses is not generated, the suspension sprockets 16 and 17 are rotated. The process of stopping is performed, and the elevation signal output (motor signal C) to the elevation motor 5 is monitored.
これを表に示すと下表のようになる。This is shown in the table below.
なお正常時のスプロケット回転信号イ，ロとモータ信号
ハの関係は第５図に示すようになり、異常発生すなわ
ち、第８図に示すように吊りチェーン２６，２７にたる
みが発生した場合のスプロケット回転信号イ，ロとモー
タ信号ハの関係は第６図に示すようになる。 Note that the relationship between the sprocket rotation signals a and b and the motor signal c during normal operation is as shown in FIG. The relationship between the rotation signals a and b and the motor signal c is as shown in FIG.
以上詳述したように、本考案に係る昇降装置における吊
りチェーン異常検出装置は、 昇降台に軸支された吊持方スプロケットに吊りチェーン
を掛けて、この吊りチェーンの移動により昇降台を昇降
させる昇降装置において、昇降台に吊持用スプロケット
の歯数を検出してパルス信号として出力する近接スイッ
チを設け、近接スイッチの出力信号と前記吊りチェーン
の駆動方のモータの出力信号とを元に処理回路により吊
りチェーンの異常を検出するようにしたことを特徴とす
るものである。As described above in detail, in the lifting chain abnormality detecting device in the lifting device according to the present invention, the lifting chain is hung on the lifting sprocket pivotally supported by the lifting platform, and the lifting chain is moved up and down by the movement of the lifting chain. In the lifting device, a proximity switch that detects the number of teeth of the lifting sprocket and outputs it as a pulse signal is provided on the lifting platform, and processing is performed based on the output signal of the proximity switch and the output signal of the motor for driving the lifting chain. The circuit is characterized in that an abnormality of the hanging chain is detected.
したがって、前記処理回路では、例えば最低速時に発す
るパルス数よりも多い場合を吊持用スプロケットの回転
状態とし、それよりも少い場合を吊持用スプロケットの
空転状態とし、またパルス数が発生しない場合を吊持用
スプロケットの停止状態とする処理を行うと共に、モー
タへの昇降信号出力を監視することができる。Therefore, in the processing circuit, for example, when the number of pulses generated at the lowest speed is greater than the number of pulses, the suspension sprocket is in the rotating state, and when less than that, the suspension sprocket is in the idle state, and the number of pulses is not generated. In this case, it is possible to carry out the processing for bringing the suspension sprocket to a stopped state and to monitor the elevation signal output to the motor.
このために、吊りチェーンの異常を発見しかつ従来装置
の複雑な機構を全て取除いて電気的に処理しローコスト
化無接点化を図ることができる。For this reason, it is possible to detect an abnormality in the hanging chain, remove all the complicated mechanisms of the conventional device, and electrically process them to achieve low cost and no contact.
第１図は本考案に係る吊りチェーン異常検出装置を備え
た昇降装置の正面図、第２図は第１図II部の拡大図、第
３図は第２図III方向からの矢視図、第４図は処理回路
の構成説明図、第５図は正常時のスプロケット回転信号
とモータ信号を示す波形図、第６図は異常時のスプロケ
ット回転信号とモータ信号の波形図、第７図は吊りチェ
ーンの正常噛合状態の説明図、第８図は吊りチェーンの
異常噛合状態の説明図である。 １１は昇降台、１６，１７は吊持用スプロケット、２
６，２７は吊りチェーン、Ａは処理回路。FIG. 1 is a front view of an elevating device equipped with a hanging chain abnormality detecting device according to the present invention, FIG. 2 is an enlarged view of part II in FIG. 1, and FIG. 3 is an arrow view from the direction of FIG. FIG. 4 is an explanatory view of the configuration of the processing circuit, FIG. 5 is a waveform diagram showing a sprocket rotation signal and a motor signal in a normal state, FIG. 6 is a waveform diagram of the sprocket rotation signal and a motor signal in an abnormal state, and FIG. FIG. 8 is an explanatory diagram of a normal meshing state of the suspension chain, and FIG. 8 is an explanatory diagram of an abnormal meshing state of the suspension chain. 11 is a lifting platform, 16 and 17 are suspension sprockets, 2
6 and 27 are suspension chains, and A is a processing circuit.
Claims (1)
吊りチェーンを掛けて、この吊りチェーンの移動により
昇降台を昇降させる昇降装置において、昇降台に吊持用
スプロケットの歯数を検出してパルス信号として出力す
る近接スイッチを設け、近接スイッチの出力信号と前記
吊りチェーンの駆動用のモータの出力信号とを元に処理
回路により吊りチェーンの異常を検出するようにしたこ
とを特徴とする昇降装置における吊りチェーン異常検出
装置。Claim: What is claimed is: 1. In a lifting device for lifting a lifting chain by hanging a hanging chain on a lifting sprocket pivotally supported on the lifting table, and detecting the number of teeth of the lifting sprocket on the lifting table. And a proximity switch for outputting as a pulse signal is provided, and an abnormality of the suspension chain is detected by a processing circuit based on the output signal of the proximity switch and the output signal of the motor for driving the suspension chain. Lifting chain abnormality detection device for lifting equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7346788U JPH065357Y2 (en) | 1988-06-03 | 1988-06-03 | Suspended chain abnormality detection device in lifting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7346788U JPH065357Y2 (en) | 1988-06-03 | 1988-06-03 | Suspended chain abnormality detection device in lifting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01176700U JPH01176700U (en) | 1989-12-15 |
| JPH065357Y2 true JPH065357Y2 (en) | 1994-02-09 |
Family
ID=31298614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7346788U Expired - Lifetime JPH065357Y2 (en) | 1988-06-03 | 1988-06-03 | Suspended chain abnormality detection device in lifting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH065357Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019115025A1 (en) * | 2019-06-04 | 2020-12-10 | Dematic Gmbh | Lifting device for a pallet truck |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5924105B2 (en) * | 2012-05-07 | 2016-05-25 | 富士通株式会社 | Library device |
| DE102013015458B4 (en) * | 2013-09-13 | 2019-04-18 | Ssi Schäfer Automation Gmbh | Safety device for a storage and retrieval unit, storage and retrieval unit and method for monitoring a storage and retrieval unit |
| US11565923B2 (en) | 2019-02-19 | 2023-01-31 | Crown Equipment Corporation | Chain slack detection system |
-
1988
- 1988-06-03 JP JP7346788U patent/JPH065357Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019115025A1 (en) * | 2019-06-04 | 2020-12-10 | Dematic Gmbh | Lifting device for a pallet truck |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01176700U (en) | 1989-12-15 |
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