JP5372422B2 - Work transfer equipment for transport cart - Google Patents

Work transfer equipment for transport cart Download PDF

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JP5372422B2
JP5372422B2 JP2008178436A JP2008178436A JP5372422B2 JP 5372422 B2 JP5372422 B2 JP 5372422B2 JP 2008178436 A JP2008178436 A JP 2008178436A JP 2008178436 A JP2008178436 A JP 2008178436A JP 5372422 B2 JP5372422 B2 JP 5372422B2
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workpiece
transfer
height
carriage
workpiece transfer
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JP2010018361A (en
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宏一 三谷
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To surely and efficiently transfer a workpiece between a carriage and a workpiece storage shelf by shortening positioning time with the carriage for conveying the workpieces loaded in multistage in a height direction in a workpiece transfer device for the carriage. <P>SOLUTION: This workpiece transfer device includes a conveying table 11 for delivering and receiving the workpiece W, an elevating means 12 for elevating the conveying table 11, a forward/backward moving means 13 for moving the conveying table 11 in a workpiece delivering/receiving direction, a communication means 18 communicating with the carriage 3, and a control means 10 for operating the conveying table 11 by controlling the elevating means 12 and the forward/backward moving means 13 based on information on a workpiece loading position obtained by using the communication means 18. The control means 10 performs height position correction of the conveying table 11 based on a signal from a height detecting sensor 15 for detecting the height of a workpiece loading stage when first delivering/receiving the workpiece with the carriage 3 and shortens positioning time based on the height position correction and a height interval between known stages as for the next and thereafter workpiece delivering/receiving. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、ワークを多段に積載して搬送する搬送台車とワーク収納棚との間でワークを移載する搬送台車用ワーク移載装置に関する。   The present invention relates to a workpiece transfer device for a transfer carriage that transfers workpieces between a transfer carriage that loads and conveys workpieces in multiple stages and a workpiece storage shelf.

従来、搬送台車とワーク移載側との間でワークを移載する場合に、搬送台車の車輪のすべりの影響や路面の凹凸の影響などにより、搬送台車とワーク移載側との位置決め精度が悪くなって移載がうまくいかないことがあった。そこで、搬送台車側に、搬送台車本体に対しその移載方向または幅方向のいずれかの方向に直線的に移動可能かつ水平面内で回転可能なワーク載置用の搬送テーブルを備え、搬送台車の停止位置がずれても、搬送テーブルを用いて停止位置精度を補ってワークを破損することなく確実かつ効率的にワークを移載できるようにした搬送台車が提案されている(例えば、特許文献1参照)。
特開2005−206344号公報(特許第3965585号)
Conventionally, when transferring workpieces between the transfer carriage and the workpiece transfer side, the positioning accuracy between the transfer carriage and the workpiece transfer side is reduced due to the effects of slippage of the wheels of the transfer carriage and the unevenness of the road surface. There was a case where the transfer was not successful. Therefore, the transfer carriage side is provided with a transfer table for placing a workpiece that can move linearly in either the transfer direction or the width direction with respect to the transfer carriage body and that can rotate in a horizontal plane. There has been proposed a transport cart that uses a transport table to compensate for the stop position accuracy so that the work can be transferred reliably and efficiently without damaging the work (for example, Patent Document 1). reference).
Japanese Patent Laying-Open No. 2005-206344 (Patent No. 3965585)

しかしながら、上述した特許文献1に示されるような搬送台車と収納棚とのワーク移載においては、ワークを多段に積載した場合に対応できず、多段に積載されて搬送されるワークを段毎に個別に確実かつ効率的に収納棚との間で移載することができない。
However, in the work transfer between the transport vehicle and the storage rack, as shown in Patent Document 1 mentioned above, can not cope when loaded with workpieces in multiple stages, a workpiece to be conveyed are stacked in multiple stages each stage In addition, it cannot be transferred individually and efficiently between the storage shelves.

本発明は、上記課題を解消するものであって、簡単な構成により、高さ方向に多段に積載されたワークを搬送する搬送台車との位置決め時間を短縮し、搬送台車とワーク収納棚との間で確実かつ効率的にワークを移載できる搬送台車用ワーク移載装置を提供することを目的とする。   The present invention solves the above-mentioned problem, and with a simple configuration, the positioning time with a transport carriage for transporting works stacked in multiple stages in the height direction is shortened. It is an object of the present invention to provide a workpiece transfer device for a transport carriage that can transfer workpieces reliably and efficiently.

上記課題を達成するために、請求項1の発明は、高さ方向に多段に積載されたワークを搬送する搬送台車とワーク収納棚との間でワークを移載するワーク移載装置において、搬送台車またはワーク収納棚からワークを受け取り、前記受け取ったワークをワーク収納棚または搬送台車に受け渡すワーク移載用の搬送テーブルと、前記搬送テーブルを昇降動させる昇降手段と、前記搬送テーブルをワーク授受方向である前後に移動させる前後動手段と、搬送台車との間で通信を行う通信手段と、前記通信手段を用いた通信によって得られたワーク積載位置の情報に基づいて前記昇降手段と前後動手段とを制御して前記搬送テーブルを動作制御する制御手段と、を備え、前記制御手段は、搬送台車がワーク移載装置の前に停止し、ワークの移載を完了してワーク移載装置から離脱するまでの間の搬送台車との最初のワーク授受に際し、搬送台車におけるワーク積載段の高さを検出する高さ検出センサからの信号に基づいて前記搬送テーブルの高さ位置補正を行い、次以降のワーク授受については前記高さ位置補正と既知の段間の高さ間隔とに基づいて高さ位置補正を行うものである。
In order to achieve the above object, a first aspect of the present invention provides a workpiece transfer apparatus for transferring workpieces between a carriage and a workpiece storage shelf that convey workpieces stacked in multiple stages in the height direction. A workpiece transfer table that receives workpieces from a cart or workpiece storage shelf and delivers the received workpieces to the workpiece storage shelf or conveyor cart, lifting means for moving the conveyor table up and down, and workpiece transfer of the conveyor table Forward / backward moving means for moving back and forth in the direction, communication means for communicating with the transport carriage, and the lifting means and the forward / backward movement based on the information on the workpiece loading position obtained by communication using the communication means. by controlling the means and a control means controls the operation of the transport table, the control means, the transport carriage is stopped in front of the workpiece transfer apparatus, the transfer of the work completed Upon first workpiece exchange with the transport carriage until detached from the workpiece transfer apparatus with a high of the conveying table based on a signal from the height detection sensor for detecting the height of the work loading stages in transporting carriage The position correction is performed, and the subsequent workpiece transfer is performed based on the height position correction and the known height interval between steps.

請求項2の発明は、請求項1に記載のワーク移載装置において、前記搬送テーブルを水平面内で授受方向に直交する方向に移動させる左右動手段と、前記搬送テーブルに設けられ搬送台車の左右の位置ずれを検出する左右位置センサと、をさらに備え、前記制御手段は、搬送台車がワーク移載装置の前に停止し、ワークの移載を完了してワーク移載装置から離脱するまでの間の搬送台車との最初のワーク授受に際し、前記左右位置センサからの信号に基づいて、前記左右動手段を制御して前記搬送テーブルの左右位置補正を行い、次以降のワーク授受については、前記左右位置補正の位置に基づいて左右位置補正を行うものである。
According to a second aspect of the present invention, there is provided the workpiece transfer apparatus according to the first aspect, wherein the transfer table is moved in a horizontal plane in a direction perpendicular to the transfer direction, and a left and right movement carriage provided on the transfer table. And a left and right position sensor for detecting a positional deviation of the workpiece , the control means until the transport carriage stops before the workpiece transfer device, completes the transfer of the workpiece and leaves the workpiece transfer device. At the time of the first workpiece exchange with the conveyance carriage between , based on the signal from the left and right position sensor, the left and right movement means is controlled to correct the left and right position of the conveyance table. The horizontal position correction is performed based on the horizontal position correction position.

請求項3の発明は、請求項1または請求項2に記載のワーク移載装置において、前記制御手段は、搬送台車におけるワーク積載位置の情報に基づいて、多段のワーク積載位置の最も中央に近い段について最初にワーク授受を行うものである。   According to a third aspect of the present invention, in the workpiece transfer apparatus according to the first or second aspect, the control means is closest to the center of the multi-stage workpiece loading positions based on the information of the workpiece loading positions in the transport carriage. This is the first work transfer for the dan.

請求項4の発明は、請求項1または請求項2に記載のワーク移載装置において、前記制御手段は、搬送台車におけるワーク積載位置の情報に基づいて、最下段と最上段のワーク積載位置について、それぞれ前記高さ検出センサからの信号に基づいて前記搬送テーブルの高さ位置補正を行って最初の2回のワーク授受を行い、他の段については、前記高さ位置補正によって得られた補正量を比例配分して高さ位置補正を行うものである。   According to a fourth aspect of the present invention, in the workpiece transfer apparatus according to the first or second aspect, the control means is configured to determine the lowermost and uppermost workpiece loading positions based on the workpiece loading position information on the transport carriage. , The height position of the transfer table is corrected based on the signal from the height detection sensor, and the first two workpieces are transferred. The other stages are corrected by the height position correction. The height position is corrected by proportionally distributing the amount.

請求項5の発明は、請求項に記載のワーク移載装置において、ワーク授受に必要な搬送テーブルの位置精度に応じて、前記高さ検出センサまたは前記左右位置センサに基づく位置補正箇所を追加するものである。
A fifth aspect of the present invention, added in the workpiece transfer apparatus according to claim 2, depending on the positional accuracy of the conveyance table necessary for the workpiece exchange, the position correction part based on the height detection sensor or the lateral position sensor To do.

請求項6の発明は、請求項1乃至請求項5のいずれか一項に記載のワーク移載装置において、前記高さ検出センサは、各段の左右2ヶ所の高さを検出するセンサであり、検出した左右の高さの平均高さに基づいて前記搬送テーブルの高さ位置補正を行うものである。
請求項7の発明は、請求項1乃至請求項6のいずれか一項に記載のワーク移載装置において、ワーク授受に必要な搬送テーブルの位置精度に応じて、前記高さ検出センサに基づく位置補正箇所を追加するものである。
A sixth aspect of the present invention is the workpiece transfer apparatus according to any one of the first to fifth aspects, wherein the height detection sensor is a sensor that detects the heights of the left and right positions of each stage. The height position of the transfer table is corrected based on the detected average height of the left and right heights.
According to a seventh aspect of the present invention, in the workpiece transfer apparatus according to any one of the first to sixth aspects, the position based on the height detection sensor according to the positional accuracy of the transfer table required for workpiece transfer. A correction point is added.

請求項1の発明によれば、最初のワーク授受のときのみ搬送台車におけるワーク積載段の高さを検出して高さ位置補正を行うので、搬送台車と搬送テーブルとの高さ方向の位置決め時間を短縮でき、多段に積まれたワークの受け渡しの時間を短縮できると共に、確実かつ効率的にワークを移載できる。   According to the first aspect of the present invention, since the height position correction is performed by detecting the height of the work loading stage in the transport carriage only at the time of the first workpiece transfer, the positioning time in the height direction between the transport carriage and the transport table is determined. Can reduce the time required to transfer the workpieces stacked in multiple stages, and can transfer the workpieces reliably and efficiently.

請求項2の発明によれば、最初のワーク授受のときのみ左右位置センサからの信号に基づく搬送テーブルの左右位置補正を行うので、位置決め時間を短縮でき、多段に積まれたワークの受け渡しの時間を短縮できると共に、確実かつ効率的にワークを移載できる。   According to the second aspect of the invention, since the right and left position correction of the transfer table is performed based on the signal from the left and right position sensor only at the time of the first workpiece transfer, the positioning time can be shortened and the time for transferring the workpieces stacked in multiple stages The workpiece can be transferred reliably and efficiently.

請求項3の発明によれば、高さ方向の位置ずれに対して平均の位置ずれを呈すると考えられる高さ位置で高さ位置補正を行うので、他の段においてもより精度の高い位置補正ができる。   According to the invention of claim 3, since the height position correction is performed at a height position that is considered to exhibit an average position shift with respect to the position shift in the height direction, the position correction with higher accuracy is also performed at other stages. Can do.

請求項4の発明によれば、高さ位置ずれの上限と下限の値に基づいて高さ位置補正を行うので、他の段においてもより精度の高い位置補正ができる。また、ワーク積載段数の多少にかかわらず2箇所の高さを検出するだけで多段のワークの受け渡しが可能となり、確実かつ効率的にワークを移載できる。   According to the fourth aspect of the present invention, since the height position correction is performed based on the upper and lower limit values of the height position deviation, more accurate position correction can be performed in other stages. In addition, a multi-stage workpiece can be transferred only by detecting the height of two places regardless of the number of workpiece loading stages, and the workpiece can be transferred reliably and efficiently.

請求項5の発明によれば、移載対象ワークの特性や搬送台車の特性に応じて要求される搬送テーブルの高さ位置や左右位置の位置決め精度に柔軟に対応でき、位置決め時間を短縮し、搬送台車とワーク収納棚との間で確実かつ効率的にワークを移載できる。   According to the invention of claim 5, it is possible to flexibly correspond to the positioning accuracy of the height position and the left and right positions of the transfer table required according to the characteristics of the workpiece to be transferred and the characteristics of the transfer carriage, and shorten the positioning time. The workpiece can be transferred reliably and efficiently between the transport carriage and the workpiece storage shelf.

請求項6の発明によれば、左右の高さのずれに対して、より搬送テーブルの位置決め精度を向上させ、確実かつ効率的にワークを移載できる。   According to the sixth aspect of the present invention, it is possible to improve the positioning accuracy of the transfer table with respect to the deviation of the left and right heights, and to transfer the work reliably and efficiently.

以下、本発明の一実施形態に係る搬送台車用ワーク移載装置について、図面を参照して説明する。図1、図2は搬送台車用ワーク移載装置を搬送台車および収納棚と共に示す。ワーク移載装置1は、ワーク収納棚2と、高さ方向に多段に積載されたワークWを搬送する搬送台車3との間に配置され、両者間でワークWを移載する装置である。ここで、ワーク移載装置1における搬送台車3側を前方、ワーク移載装置1から搬送台車3に向かって左側を左方とする。図中では、前方、左方、上方がそれぞれx方向、y方向、z方向とされている。   Hereinafter, a workpiece transfer device for a transport carriage according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 show a workpiece transfer device for a conveyance carriage together with a conveyance carriage and a storage shelf. The workpiece transfer device 1 is a device that is arranged between the workpiece storage shelf 2 and the transport carriage 3 that transports the workpieces W stacked in multiple stages in the height direction, and transfers the workpieces W between them. Here, the conveyance cart 3 side in the workpiece transfer device 1 is defined as the front, and the left side from the workpiece transfer device 1 toward the conveyance cart 3 is defined as the left. In the figure, the front, left, and upper directions are the x direction, the y direction, and the z direction, respectively.

ワーク移載装置1は、ワーク収納棚2または搬送台車3からワークWを受け取り、受け取ったワークWを搬送台車3またはワーク収納棚2に受け渡すワーク移載用の搬送テーブル11と、搬送テーブル11を昇降動させる昇降手段12と、搬送テーブル11をワーク授受方向である前後に移動させる前後動手段13と、搬送テーブル11を水平面内で左右に移動させる左右動手段14と、搬送台車3におけるワーク積載段の高さを検出する高さ検出センサ15と、搬送テーブル11が搬送台車3に接触または近接したことを検出する接岸センサ16と、搬送テーブル11に設けられ搬送台車3の左右の位置ずれを検出する左右位置センサ17と、収納棚2および搬送台車3との間で通信を行う通信手段18と、昇降手段12、前後動手段13、および左右動手段14を制御して搬送テーブル11を動作制御する制御手段10とを備えている。   The workpiece transfer apparatus 1 receives a workpiece W from the workpiece storage shelf 2 or the transport carriage 3 and transfers the received workpiece W to the transport cart 3 or the workpiece storage shelf 2. Lifting and lowering means 12 for moving up and down, forward and backward moving means 13 for moving the transfer table 11 back and forth in the workpiece transfer direction, left and right moving means 14 for moving the transfer table 11 left and right within the horizontal plane, and workpieces in the transfer carriage 3 A height detection sensor 15 that detects the height of the loading stage, a berthing sensor 16 that detects that the conveyance table 11 is in contact with or close to the conveyance carriage 3, and a lateral displacement of the conveyance carriage 3 provided on the conveyance table 11 Left and right position sensor 17, communication means 18 for communicating between storage shelf 2 and transport carriage 3, elevating means 12, and back and forth movement means 13 And a control unit 10 which controls the operation of the conveying table 11 lateral movement means 14 is controlled to.

搬送テーブル11は、図3に示すように、昇降手段12によって昇降される基台12aの上に上下に配置した左右動手段14と前後動手段13の上に配置されることにより、上下、左右、前後に位置調整可能とされている。搬送テーブル11には、その前面に高さ検出センサ15と左右位置センサ17とが設けられ、また、不図示の接岸センサ16が設けられている。   As shown in FIG. 3, the transfer table 11 is arranged on the base 12 a that is moved up and down by the elevating means 12 and on the left and right moving means 14 and the front and rear moving means 13. The position can be adjusted back and forth. The transport table 11 is provided with a height detection sensor 15 and a left / right position sensor 17 on the front surface thereof, and a bank contact sensor 16 (not shown).

基台12aは、4隅のガイド孔12bに、ワーク移載装置1の4隅に立設された上下ガイド軸12cを摺動可能に挿通させることにより水平を保って、駆動ベルトによって昇降手段12に連結され、上下動される。左右動手段14と前後動手段13とには、それぞれ不図示の直線移動機構が内蔵され、所定の動作が可能とされている。   The base 12a keeps horizontal by slidably inserting upper and lower guide shafts 12c erected at the four corners of the workpiece transfer device 1 into the guide holes 12b at the four corners. And is moved up and down. Each of the left and right moving means 14 and the back and forth moving means 13 has a built-in linear movement mechanism (not shown) so that a predetermined operation is possible.

搬送テーブル11は、ワークWを授受するために、前後動手段13によって前後動され、ワーク収納棚2における棚20や搬送台車3における棚30に対して、接近または離間する。搬送テーブル11のワーク載置面11aには、ワークWを前後動させて授受するための不図示のコンベア装置が設けられている。コンベア装置は、ワークWの授受に際し、ワーク収納棚2における棚20や搬送台車3における棚30の動作に連動して正転または逆転し、搬送テーブル11が前後動中は停止する。   The transfer table 11 is moved back and forth by the back-and-forth movement means 13 in order to transfer the workpiece W, and approaches or moves away from the shelf 20 in the workpiece storage shelf 2 and the shelf 30 in the transfer carriage 3. A workpiece mounting surface 11a of the transfer table 11 is provided with a conveyor device (not shown) for transferring the workpiece W back and forth. When the workpiece W is transferred, the conveyor device rotates forward or reverse in conjunction with the operation of the shelf 20 in the workpiece storage shelf 2 or the shelf 30 in the conveyance carriage 3 and stops while the conveyance table 11 moves back and forth.

また、搬送テーブル11は、その全体が水平面内で受動的に回転する。すなわち、図4(a)(b)に示すように、搬送台車3における棚30と搬送テーブル11とが互いに正対していない場合に、搬送テーブル11は、前後動手段13の動作によって棚30の前面に向けて押されることにより、転がり機構11bを介して棚30から反力(偶力)を受けて矢印Rで示すように回転する。従って、搬送台車3がワーク移載装置1に対して正対しないで停止する場合であっても、搬送テーブル11を棚30に正対させることができ、互い連動するコンベア装置によってワークWを直線的に移動させ、授受できる。   Further, the entire transport table 11 is passively rotated within a horizontal plane. That is, as shown in FIGS. 4 (a) and 4 (b), when the shelf 30 and the transport table 11 in the transport cart 3 do not face each other, the transport table 11 is moved by the operation of the longitudinal movement means 13. By being pushed toward the front surface, it receives a reaction force (couple) from the shelf 30 via the rolling mechanism 11b and rotates as indicated by an arrow R. Therefore, even when the transport carriage 3 stops without facing the workpiece transfer device 1, the transport table 11 can be directly facing the shelf 30, and the workpiece W can be straightened by the interlocking conveyor device. Can be moved and transferred.

また、棚30から受ける前記反力を検出する応力センサや、反力による搬送テーブル11の平行移動や回転を検出する動きセンサなどを用いて、前述の接岸センサ16を構成することができる。接岸センサ16として、マイクロスイッチや種々の接触スイッチを用いることもできる。磁界や渦電流などを検出する近接センサ、光や超音波を用いる距離センサなども併用でき、距離センサは下記の左右位置センサ17用のものを兼用してもよい。   In addition, the above-described berthing sensor 16 can be configured using a stress sensor that detects the reaction force received from the shelf 30, a motion sensor that detects parallel movement or rotation of the transport table 11 due to the reaction force, and the like. A micro switch or various contact switches can also be used as the pier sensor 16. A proximity sensor that detects a magnetic field, eddy current, or the like, a distance sensor that uses light or ultrasonic waves, and the like can be used together.

左右位置センサ17は、図5(a)(b)に示すように、搬送テーブル11の前面左右に所定間隔をおいて設けられた距離センサを用いて構成されている。搬送台車3の棚30の前面中央には、左右方向に拡径された中段を有する凹部31が形成されており、凹部31の底部径は左右の距離センサ間の所定間隔より僅かに広くされている。従って、制御手段10は、左右の距離センサの出力を比較することにより、搬送テーブル11と棚30との位置ずれを検出することができる。   As shown in FIGS. 5A and 5B, the left / right position sensor 17 is configured by using distance sensors provided at predetermined intervals on the left and right sides of the front surface of the transport table 11. In the center of the front surface of the shelf 30 of the transport carriage 3, a recess 31 having a middle step expanded in the left-right direction is formed, and the bottom diameter of the recess 31 is slightly wider than a predetermined interval between the left and right distance sensors. Yes. Therefore, the control means 10 can detect the positional deviation between the transport table 11 and the shelf 30 by comparing the outputs of the left and right distance sensors.

ワーク収納棚2は、高さ方向に多段に構成された複数の棚20と、ワーク移載装置1の通信手段18との間で通信を行う通信手段28とを備えている。各棚20のワーク載置面には、ワークWを前後動させて授受するための不図示のコンベア装置が設けられている。コンベア装置は、ワークWの授受に際し、ワーク移載装置1における搬送テーブル11の動作に連動して正転または逆転し、ワークWの保管中は停止する。   The workpiece storage shelf 2 includes a plurality of shelves 20 configured in multiple stages in the height direction, and a communication unit 28 that performs communication between the communication unit 18 of the workpiece transfer apparatus 1. On the work placement surface of each shelf 20, a conveyor device (not shown) for transferring the work W back and forth is provided. When the workpiece W is transferred, the conveyor device rotates normally or reversely in conjunction with the operation of the transfer table 11 in the workpiece transfer device 1 and stops while the workpiece W is stored.

上述のワーク収納棚2は、例えば、生産工場、病院、各種検査室、倉庫、配送センタなどの窓口に固定配置された棚であり、その前方においてワーク移載装置1との間でワークWの授受が行われる。ワークWは、例えば、製品、部品、検体、サンプルなどである。ワークWの形態は1つの物体に限らず、多数の物体の集合物を容器やトレイに収納した形態も可能であり、種々形態のワークWを移載の対象とすることができる。   The above-described work storage shelf 2 is a shelf fixedly arranged at a window of a production factory, a hospital, various examination rooms, a warehouse, a distribution center, or the like, for example, and a work W between the work transfer device 1 and the front thereof. Transfer is performed. The workpiece W is, for example, a product, a part, a specimen, a sample, or the like. The form of the work W is not limited to one object, and a form in which a collection of a large number of objects is stored in a container or a tray is possible, and various forms of the work W can be used as a transfer target.

搬送台車3は、ワークWを高さ方向に多段に積載するための複数の棚30と、ワーク移載装置1の通信手段18との間で通信を行う通信手段38と、自律走行移動のための手段(不図示)とを備えている。各棚30のワーク載置面には、ワークWを前後動させて授受するための不図示のコンベア装置が設けられている。コンベア装置は、ワークWの授受に際し、ワーク移載装置1における搬送テーブル11の動作に連動して正転または逆転し、ワークWの保管中は停止する。   The transport carriage 3 includes a plurality of shelves 30 for stacking the workpieces W in the height direction, a communication unit 38 that communicates with the communication unit 18 of the workpiece transfer device 1, and an autonomous traveling movement. Means (not shown). On the work placement surface of each shelf 30, a conveyor device (not shown) for transferring the work W back and forth is provided. When the workpiece W is transferred, the conveyor device rotates normally or reversely in conjunction with the operation of the transfer table 11 in the workpiece transfer device 1 and stops while the workpiece W is stored.

また、各棚30は、基準面(例えば、搬送台車の走行路面)からの高さと、左右中央位置と、ワーク移載装置1に対面する側の前面位置とを、それぞれワーク移載装置1側から認識可能とするための不図示のマーク、凹凸形状などを備えている。これらのマークや凹凸形状は、搬送テーブル11に備えられた高さ検出センサ15などで検出される。   In addition, each shelf 30 has a height from a reference plane (for example, a traveling road surface of the transport carriage), a left and right center position, and a front surface position on the side facing the workpiece transfer device 1, respectively. Are provided with a mark (not shown), a concavo-convex shape, and the like. These marks and concave / convex shapes are detected by a height detection sensor 15 provided on the transport table 11 or the like.

上述の搬送台車3は、あるワーク収納棚2からワーク移載装置1を介して、または人手によってワークWを受け取り、自律走行手段によって自律的に走行移動して他のワーク収納棚2に到達し、ワーク移載装置1の前に停止して、ワーク移載装置1を介してワークWを受け渡す。   The above-described transport cart 3 receives a workpiece W from a workpiece storage shelf 2 via the workpiece transfer device 1 or manually, travels autonomously by autonomous traveling means, and reaches another workpiece storage shelf 2. Then, it stops before the workpiece transfer device 1 and delivers the workpiece W via the workpiece transfer device 1.

次に、図6を参照して、ワーク移載装置1によるワーク移載の動作を説明する。搬送台車3がワーク移載装置1の前に停止すると、ワーク移載装置1の制御手段10は、通信手段18を用いた通信によって得られたワーク積載位置の情報に基づいて昇降手段12を制御して、図6(a)に示すように、搬送テーブル11を所定の高さまで昇降する。   Next, with reference to FIG. 6, the operation | movement of the workpiece transfer by the workpiece transfer apparatus 1 is demonstrated. When the transport carriage 3 stops before the workpiece transfer device 1, the control means 10 of the workpiece transfer device 1 controls the lifting / lowering means 12 based on the information of the workpiece loading position obtained by communication using the communication means 18. Then, as shown in FIG. 6A, the transport table 11 is raised and lowered to a predetermined height.

その後、制御手段10は、前後動手段13を制御して、図6(b)に示すように、搬送テーブル11を搬送台車3の棚30に向けて前進させ、接岸センサ16(不図示)による接岸検出信号を受けて前進を停止させ、搬送テーブル11のコンベアを動作させる。このとき、通信手段18を介して、搬送台車3に対して棚30のコンベアを連動させることにより、図6(c)に示すように、ワークWが棚30から搬送テーブル11へと移動される。   Thereafter, the control means 10 controls the back-and-forth movement means 13 to advance the transport table 11 toward the shelf 30 of the transport carriage 3 as shown in FIG. In response to the berthing detection signal, the forward movement is stopped and the conveyor of the transfer table 11 is operated. At this time, the work W is moved from the shelf 30 to the conveyance table 11 as shown in FIG. 6C by interlocking the conveyor of the shelf 30 with the conveyance carriage 3 via the communication means 18. .

ワークWが棚30から搬送テーブル11へと移載されると、両方のコンベアが停止され、搬送テーブル11は、図6(d)に示すように、前後動手段13によってワーク収納棚2の棚20に向けて移動され、所定位置で停止し、搬送テーブル11のコンベアが動作される。このとき、通信手段18を介して、ワーク収納棚2に対して棚20のコンベアを連動させることにより、図6(e)に示すように、ワークWが搬送テーブル11から棚20へと移動される。   When the workpiece W is transferred from the shelf 30 to the conveyance table 11, both conveyors are stopped, and the conveyance table 11 is moved to the shelf of the workpiece storage shelf 2 by the back-and-forth movement means 13, as shown in FIG. It moves toward 20, stops at a predetermined position, and the conveyor of the transfer table 11 is operated. At this time, the work W is moved from the transfer table 11 to the shelf 20 as shown in FIG. 6E by interlocking the conveyor of the shelf 20 with the work storage shelf 2 via the communication means 18. The

その後、搬送テーブル11は、図6(f)に示すように、ワーク移載装置1における前後中央の位置に戻され、次のワークWを移載するために、図6(f)に示すように、所定の高さまで昇降される。以下同様に、ワークWの移載が完了するまで、上述の動作が繰り返される。   Thereafter, as shown in FIG. 6 (f), the transfer table 11 is returned to the front / rear center position in the work transfer device 1, and the next work W is transferred as shown in FIG. 6 (f). Then, it is moved up and down to a predetermined height. Similarly, the above-described operation is repeated until the transfer of the workpiece W is completed.

ワーク移載装置1によるワーク移載は、ワーク収納棚2と搬送台車3との間で、任意の組合せで行うことができる。すなわち、搬送台車3がワーク移載装置1の前に停止している状態で、幾つかのワークWが搬送台車3からワーク収納棚2へと移載され、他の幾つかのワークWがワーク収納棚2から搬送台車3へと移載される。また、複数の棚20と複数の棚30との対応も任意である。そこで、このような任意のワーク移載を実現するために、各通信手段18,28,38を用いて、どの棚のワークをどの棚に移載するかなどのワーク移載に関する情報がやり取りされる。   The workpiece transfer by the workpiece transfer device 1 can be performed between the workpiece storage rack 2 and the transport carriage 3 in any combination. That is, in a state where the transport carriage 3 is stopped in front of the workpiece transfer device 1, some works W are transferred from the transport carriage 3 to the work storage rack 2, and some other works W are Transferred from the storage shelf 2 to the transport carriage 3. The correspondence between the plurality of shelves 20 and the plurality of shelves 30 is also arbitrary. Therefore, in order to realize such an arbitrary workpiece transfer, information on the workpiece transfer such as which shelf workpiece is transferred to which shelf is exchanged using each communication means 18, 28, 38. The

上述の搬送テーブル11の一連の動作において、制御手段10は、搬送台車3との最初のワーク授受に際し、搬送台車3におけるワーク積載段の高さを検出する高さ検出センサ15からの信号に基づいて搬送テーブル11の高さ位置補正を行い、次以降のワーク授受については前記最初の高さ位置補正と既知の段間の高さ間隔とに基づいて高さ位置補正を行う。   In the series of operations of the transfer table 11 described above, the control means 10 is based on a signal from a height detection sensor 15 that detects the height of the work loading stage in the transfer carriage 3 when the first workpiece is transferred to and from the transfer carriage 3. Then, the height position of the transfer table 11 is corrected, and for the subsequent workpiece transfer, the height position correction is performed based on the first height position correction and the known height interval between steps.

このようなワーク移載装置1によれば、最初のワーク授受のときのみ搬送台車3におけるワーク積載段の高さを検出して高さ位置補正を行うので、搬送台車3と搬送テーブル11との高さ方向の位置決め時間を短縮でき、多段に積まれたワークWの受け渡しの時間を短縮できると共に、確実かつ効率的にワークWを移載できる。   According to such a workpiece transfer apparatus 1, the height of the workpiece loading stage in the conveyance carriage 3 is detected and the height position correction is performed only at the time of the first workpiece transfer, so that the height between the conveyance carriage 3 and the conveyance table 11 can be corrected. The positioning time in the height direction can be shortened, the time for transferring the workpieces W stacked in multiple stages can be shortened, and the workpieces W can be transferred reliably and efficiently.

また、制御手段10は、搬送台車3との最初のワーク授受に際し、左右位置センサ17からの信号に基づいて、左右動手段14を制御して搬送テーブル11の左右位置補正を行い、次以降のワーク授受については、前記最初の左右位置補正の位置あるいは位置補正量に基づいて左右位置補正を行う。   Further, the control means 10 controls the left and right moving means 14 to correct the left and right position of the transfer table 11 on the basis of the signal from the left and right position sensor 17 at the time of the first workpiece exchange with the transfer carriage 3, For workpiece transfer, the left / right position correction is performed based on the position or position correction amount of the first left / right position correction.

このようなワーク移載装置1によれば、最初のワーク授受のときのみ左右位置センサ17からの信号に基づく搬送テーブル11の左右位置補正を行うので、位置決め時間を短縮でき、多段に積まれたワークWの受け渡しの時間を短縮できると共に、確実かつ効率的にワークWを移載できる。   According to such a workpiece transfer device 1, since the left / right position correction of the transfer table 11 is performed based on the signal from the left / right position sensor 17 only at the time of the first workpiece transfer, the positioning time can be shortened and stacked in multiple stages. The time for transferring the workpiece W can be shortened, and the workpiece W can be transferred reliably and efficiently.

また、制御手段10は、搬送台車3におけるワーク積載位置の情報に基づいて、多段のワーク積載位置における高さ方向で最も中央に近い段について最初にワーク授受を行う。ここで、ワーク積載位置とは、搬送台車3における、搬送テーブル11が受け取り予定のワークWが積載されている棚30の位置、および、搬送台車3における、ワークWを受け渡し予定の棚30の位置である。言い換えると、ワーク積載位置とは、搬送テーブル11がアクセスする予定の棚30の位置である。従って、高さ方向で最も中央に近い段は、高さ方向の位置ずれ、および左右方向の位置ずれのそれぞれについて、平均の位置ずれを呈すると考えられる。   Further, based on the information on the workpiece loading position on the transport carriage 3, the control means 10 first performs workpiece transfer on the stage closest to the center in the height direction at the multistage workpiece loading position. Here, the workpiece loading position refers to the position of the shelf 30 on which the workpiece W scheduled to be received by the conveyance table 11 is loaded on the conveyance carriage 3 and the position of the shelf 30 scheduled to deliver the workpiece W on the conveyance carriage 3. It is. In other words, the workpiece loading position is the position of the shelf 30 that is to be accessed by the transfer table 11. Therefore, it is considered that the step closest to the center in the height direction exhibits an average position shift for each of the position shift in the height direction and the position shift in the left-right direction.

ワーク移載装置1の前に停止した搬送台車3が、路面の影響や車輪の変形などの影響によって傾いていたとしても、2回目以降のワーク移載に際して、多段のワーク積載位置の最も中央に近い段付近で補正を行うことにより、高さ位置や左右位置のずれ量の平均値に基づいて位置補正できるので、他の段においてもより精度の高い位置補正ができる。   Even if the transport carriage 3 stopped in front of the workpiece transfer device 1 is tilted due to the influence of the road surface or the deformation of the wheels, the second and subsequent workpieces are transferred to the center of the multistage workpiece loading position. By performing the correction in the vicinity of the near stage, the position can be corrected based on the average value of the deviation amounts of the height position and the left and right positions, so that the position can be corrected with higher accuracy in the other stages.

また、上述の説明に拘わらず、ワーク授受に必要な搬送テーブル11の位置精度に応じて、高さ検出センサ15または左右位置センサ17に基づく位置補正箇所を追加することもできる。このようなワーク移載装置1によれば、移載対象ワークWの特性や搬送台車3の特性に応じて要求される搬送テーブル11の高さ位置や左右位置の位置決め精度に柔軟に対応でき、位置決め時間を短縮し、ワーク収納棚2と搬送台車3との間で確実かつ効率的にワークを移載できる。例えば、位置補正精度を上げるため、最上段と最下段だけでなくその間の段の補正を追加することにより補正の精度をより上げることができる。   Regardless of the above description, a position correction location based on the height detection sensor 15 or the left / right position sensor 17 can be added according to the position accuracy of the transfer table 11 necessary for workpiece transfer. According to such a workpiece transfer apparatus 1, it is possible to flexibly cope with the positioning accuracy of the height position and the left and right positions of the transfer table 11 required according to the characteristics of the transfer target workpiece W and the characteristics of the transfer carriage 3. Positioning time can be shortened, and workpieces can be transferred between the workpiece storage rack 2 and the transport carriage 3 reliably and efficiently. For example, in order to increase the position correction accuracy, the correction accuracy can be further improved by adding not only the uppermost and lowermost steps but also the steps between them.

また、ワーク移載装置1において、高さ検出センサ15を、各段の左右2ヶ所の高さを検出するセンサとして、検出した左右の高さの平均高さに基づいて搬送テーブル11の高さ位置補正を行うようにしてもよい。このようなワーク移載装置1によれば、左右方向の傾きによる位置ずれに対してより精度良く位置補正を行うことができるので、ワーク受け渡しの時間を短縮することができる。   Moreover, in the workpiece transfer apparatus 1, the height detection sensor 15 is used as a sensor for detecting the heights of the left and right positions of each stage, and the height of the transfer table 11 is determined based on the average height of the detected left and right heights. Position correction may be performed. According to such a workpiece transfer device 1, position correction can be performed with higher accuracy with respect to a positional shift caused by a tilt in the left-right direction, so that the time for workpiece transfer can be shortened.

なお、ワーク移載装置1は、ワーク収納棚2の前に固定されて用いられるので、搬送テーブル11と棚20との位置関係は固定された関係にある。従って、位置調整された初期設定の条件のもとでワーク移載装置1を動作させることにより、この両者間においては、位置センサなどを用いる位置合わせをすることなく、ワーク移載が可能である。   In addition, since the workpiece transfer apparatus 1 is used by being fixed in front of the workpiece storage shelf 2, the positional relationship between the transfer table 11 and the shelf 20 is fixed. Accordingly, by operating the workpiece transfer apparatus 1 under the adjusted initial setting conditions, it is possible to transfer the workpiece between the two without performing alignment using a position sensor or the like. .

また、制御手段10は、CPUやメモリや外部記憶装置や表示装置や入力装置などを備えた一般的な構成を備えた電子計算機、およびその上のプロセスの集合として構成することができる。   Further, the control means 10 can be configured as a set of electronic computers having a general configuration including a CPU, a memory, an external storage device, a display device, an input device, and the like, and processes thereon.

(ワーク移載の手順)
図7のフローチャートを参照して、ワーク移載装置1を用いたワーク移載の一連の手順をさらに説明する。ここで説明する手順は、搬送台車3がワーク移載装置1の前に停止し、ワークWの移載を完了してワーク移載装置1から離脱するまでの手順である。搬送台車3がワーク移載装置1の前に停止すると、ワーク移載装置1の制御手段10は、通信手段18を用いて搬送台車3またはワーク収納棚2からワーク移載情報を入手する(S1)。
(Work transfer procedure)
With reference to the flowchart of FIG. 7, a series of procedures of workpiece transfer using the workpiece transfer device 1 will be further described. The procedure described here is a procedure from when the transport carriage 3 stops before the workpiece transfer device 1, completes the transfer of the workpiece W, and then leaves the workpiece transfer device 1. When the transport carriage 3 stops before the work transfer device 1, the control means 10 of the work transfer device 1 obtains the work transfer information from the transport carriage 3 or the work storage shelf 2 using the communication means 18 (S1). ).

ワーク移載情報は、例えば、搬送台車3に積載されているワークWであってワーク収納棚2に移載されるワークWに関する識別番号、個数、ワーク積載位置(棚30の識別番号など)などの情報である。また、同様に、ワーク収納棚2に収納されているワークWであって搬送台車3に移載されるワークWに関する識別番号、個数、ワーク積載位置(棚20の識別番号など)などの情報である。   The workpiece transfer information is, for example, the identification number, the number, the workpiece loading position (such as the identification number of the shelf 30) related to the workpiece W loaded on the transport carriage 3 and transferred to the workpiece storage shelf 2. Information. Similarly, information such as the identification number, the number, and the workpiece loading position (such as the identification number of the shelf 20) related to the workpiece W stored in the workpiece storage shelf 2 and transferred to the transport carriage 3. is there.

なお、ここでは、搬送台車3からワーク収納棚2への移載の場合についてのみ説明するが、ワーク収納棚2から搬送台車3への移載の場合は、ワークWの移動方向が変わるだけである。制御手段10は、ワーク移載情報を入手すると、ワーク積載位置の情報に基づいて昇降手段12を制御して、搬送テーブル11を所定の高さまで昇降させ(S2)、搬送台車3に向けて前進させ接岸させる(S3)。   Here, only the case of transfer from the transport carriage 3 to the work storage shelf 2 will be described. However, in the case of transfer from the work storage shelf 2 to the transport carriage 3, only the movement direction of the work W changes. is there. Upon obtaining the workpiece transfer information, the control means 10 controls the lifting / lowering means 12 based on the workpiece loading position information to raise and lower the transfer table 11 to a predetermined height (S2) and move forward toward the transfer carriage 3. And berthing (S3).

上述のステップS3の接岸が1回目の場合には(S4でYes)、制御手段10は、高さ検出センサ15からの信号に基づいて高さ位置補正を行い(S5)、さらに、左右位置センサ17からの検出信号に基づいて左右位置補正を行う(S6)。   When the berthing in step S3 is the first time (Yes in S4), the control means 10 performs height position correction based on the signal from the height detection sensor 15 (S5), and further, the left and right position sensors. The left / right position correction is performed based on the detection signal from 17 (S6).

また、上述の接岸が1回目ではない場合には(S4でNo)、制御手段10は、左右位置センサ17からの検出信号によらずに、1回目の左右位置補正に基づいて、左右位置補正を行う(S7)。この補正を行えるように、制御手段10は、1回目の左右位置補正に関する基準値からの補正量を記憶している。   When the above-mentioned berthing is not the first time (No in S4), the control means 10 does not depend on the detection signal from the left / right position sensor 17 and corrects the left / right position based on the first right / left position correction. (S7). In order to perform this correction, the control means 10 stores a correction amount from a reference value relating to the first horizontal position correction.

搬送テーブル11の高さ位置と左右位置が位置補正されて確定されると、互いに通信を行って、コンベアを動作させて、搬送台車3から搬送テーブル11へとワークの授受が行われ(S8)、搬送テーブル11が後退する(S9)。その後、搬送テーブル11の高さ位置がワーク収納棚2における所定の棚20に合わされ、棚20に接近して(必ずしも接岸する必要はない)ワークの授受が行われる(S10)。   When the height position and the left and right position of the transfer table 11 are corrected and determined, communication is performed, the conveyor is operated, and workpieces are transferred from the transfer carriage 3 to the transfer table 11 (S8). Then, the transfer table 11 is retracted (S9). Thereafter, the height position of the transfer table 11 is adjusted to a predetermined shelf 20 in the workpiece storage shelf 2, and the workpiece is transferred (closed to the berth) (closed to the shelf 20) (S10).

上述の1つのワークWの移載が完了する毎に全体の移載の終了の如何が判断され(S11)、全ワークについて移載終了ならば(S11でYes)、ワーク移載装置1における処理は終了し、搬送台車3はワーク移載装置1の前から離脱する。   Each time the transfer of one workpiece W is completed, it is determined whether or not the entire transfer has been completed (S11). If all the workpieces have been transferred (Yes in S11), the processing in the workpiece transfer device 1 is performed. Is completed, and the transport carriage 3 is detached from the front of the workpiece transfer device 1.

また、全ワークについて移載終了ではないならば(S11でNo)、制御手段10は、前回の高さ位置補正に基づいて次の昇降位置の設定を行う(S12)。この設定に際し、制御手段10は、記憶している1回目の高さ位置補正に関する基準値からの補正量を用いる。その後、制御は、ステップS2に戻されて、上述の処理が繰り返される。   If the transfer is not completed for all the workpieces (No in S11), the control means 10 sets the next lift position based on the previous height position correction (S12). In this setting, the control means 10 uses the stored correction amount from the reference value regarding the first height position correction. Thereafter, the control is returned to step S2, and the above-described processing is repeated.

上述のステップS7における左右位置補正は、ステップS12の前または後において行うようにしてもよい。   The left-right position correction in step S7 described above may be performed before or after step S12.

(ワーク移載の他の手順)
図8のフローチャートを参照して、ワーク移載装置1を用いたワーク移載の他の一連の手順を説明する。本手順において、制御手段10は、搬送台車3におけるワーク積載位置の情報に基づいて、最下段と最上段のワーク積載位置について、それぞれ高さ検出センサ15からの信号に基づいて搬送テーブル11の高さ位置補正を行って最初の2回のワーク授受を行い、他の段については、前記高さ位置補正によって得られた補正量を比例配分して高さ位置補正を行う。
(Other procedures for transferring workpieces)
With reference to the flowchart of FIG. 8, another series of procedures for transferring a workpiece using the workpiece transfer device 1 will be described. In this procedure, the control means 10 determines the height of the transfer table 11 based on the signal from the height detection sensor 15 for the lowermost and uppermost work load positions based on the information of the work load positions on the transfer carriage 3. The position is corrected and the first two workpieces are exchanged. For the other stages, the correction of the height position is performed by proportionally distributing the correction amount obtained by the height position correction.

ここで説明する手順は、ワーク移載情報や移載に関する条件については、上述の図7を参照して説明した内容と同様とする。また、搬送テーブル11の左右位置調整は行う必要がないものとする。このような前提のもとで、搬送台車3がワーク移載装置1の前に停止すると、ワーク移載装置1の制御手段10は、ワーク移載情報を入手する(#1)。   The procedure described here is the same as the content described with reference to FIG. 7 described above with respect to the workpiece transfer information and transfer conditions. Further, it is not necessary to adjust the left / right position of the transfer table 11. Under such a premise, when the transport carriage 3 stops before the workpiece transfer device 1, the control means 10 of the workpiece transfer device 1 obtains workpiece transfer information (# 1).

次に、ワーク移載が1回目かどうか判断され、1回目の場合には(#2でYes)、制御手段10は、ワーク移載情報を参照してワーク移載の対象となる棚30の最上段位置に搬送テーブル11を昇降させる(#3)。次に、制御手段10は、搬送テーブル11を前進、接岸させ、高さ検出センサ15からの信号に基づいて高さ位置補正を行う(#4)。   Next, it is determined whether or not the workpiece is transferred for the first time. If the workpiece is transferred for the first time (Yes in # 2), the control means 10 refers to the workpiece transfer information and determines the shelf 30 to be transferred. The transport table 11 is moved up and down to the uppermost position (# 3). Next, the control means 10 advances and contacts the conveyance table 11, and performs height position correction based on the signal from the height detection sensor 15 (# 4).

その後、搬送台車3から搬送テーブル11へのワークWの授受(#5)、搬送テーブル11の後退(#6)、ワーク収納棚2へのワークの授受が行われる(#7)。   Thereafter, the workpiece W is transferred from the transfer cart 3 to the transfer table 11 (# 5), the transfer table 11 is retracted (# 6), and the workpiece is transferred to the workpiece storage shelf 2 (# 7).

また、上述のステップ#2において1回目ではないと判断された場合には(#2でNo)、さらに、2回目かどうか判断される(#9)。2回目の場合には(#9でYes)、ワーク移載情報を参照してワーク移載の対象となる棚30の最下段位置に搬送テーブル11を昇降させる(#3)。以下、上述のステップ#4〜#7が実行される。   If it is determined in step # 2 that it is not the first time (No in # 2), it is further determined whether it is the second time (# 9). In the case of the second time (Yes in # 9), the transport table 11 is moved up and down to the lowest position of the shelf 30 that is the target of workpiece transfer with reference to the workpiece transfer information (# 3). Thereafter, the above steps # 4 to # 7 are executed.

また、2回目ではない場合、すなわち3回目以降の場合には(#9でNo)、制御手段10は、1回目と2回目の位置補正された高さ位置を補間して昇降位置を設定し(#12)、搬送テーブル11を前記設定された位置に昇降する(#12)。以下、上述のステップ#4〜#7が実行される。   If it is not the second time, that is, if it is the third time or later (No in # 9), the control means 10 sets the lift position by interpolating the height position corrected for the first time and the second time. (# 12) The transport table 11 is moved up and down to the set position (# 12). Thereafter, the above steps # 4 to # 7 are executed.

上述のステップ#7の後、全体のワーク移載の終了の如何が判断され(#8)、全ワークについて移載終了ではないならば(#8でNo)、制御は、ステップ#2に戻されて、上述の処理が繰り返される。全ワークについて移載終了ならば(#8でYes)、ワーク移載処理は終了し、搬送台車3はワーク移載装置1の前から離脱する。   After the above-described step # 7, it is determined whether or not the entire workpiece transfer has been completed (# 8). If all the workpieces have not been transferred (No in # 8), the control returns to step # 2. Then, the above-described processing is repeated. If transfer has been completed for all the workpieces (Yes in # 8), the workpiece transfer process is completed, and the transport carriage 3 is detached from the front of the workpiece transfer apparatus 1.

上述のような処理を行うワーク移載装置1によれば、高さ位置ずれの上限と下限の値に基づいて高さ位置補正を行うので、他の段においてもより精度の高い位置補正ができる。また、ワーク積載段数の多少にかかわらず2箇所の高さを検出するだけで位置精度の良いワーク受け渡しが可能となり、確実かつ効率的にワークを移載できる。   According to the workpiece transfer apparatus 1 that performs the processing as described above, the height position correction is performed based on the upper and lower limits of the height position deviation, so that more accurate position correction can be performed in other stages. . In addition, workpieces can be delivered with high positional accuracy by detecting the heights of two locations regardless of the number of workpiece loading stages, and workpieces can be transferred reliably and efficiently.

(実施例)
搬送台車用ワーク移載装置の実施例を図9、図10に示し、同ワーク移載装置がワークを授受する対象である搬送台車の実施例を図11(a)(b)に示す。搬送台車3の下部はモータや走行制御装置、バッテリなどが内蔵されており無軌道で自律走行する機能を有している。搬送台車3が、無軌道で自律走行するので、ワーク移載装置1に対する停止位置決め精度は、例えば水平方向確度で±30mmである。また、搬送台車3は、ワークWを収納する多段ストッカ(棚30)を上部に備えている。多段ストッカは、搬送台車3の走行時には、外部からの保護のためシャッタ等で保護される。
(Example)
9 and 10 show an embodiment of a workpiece transfer device for a transfer carriage, and FIGS. 11A and 11B show an embodiment of a transfer carriage to which the workpiece transfer device is to receive and transfer a workpiece. The lower part of the transport carriage 3 incorporates a motor, a travel control device, a battery and the like, and has a function of autonomously traveling without a track. Since the transport carriage 3 autonomously travels without a track, the stop positioning accuracy with respect to the workpiece transfer device 1 is, for example, ± 30 mm in horizontal accuracy. In addition, the transport carriage 3 includes a multi-stage stocker (shelf 30) for storing the workpieces W in the upper part. The multistage stocker is protected by a shutter or the like for protection from the outside when the transport carriage 3 is traveling.

上述のような搬送台車3の位置決め精度では、床面の凹凸や製造上の誤差により、3次元的に配置されている多段の棚30に収納されたワークWを確実にワーク移載装置1に受け渡しすることができるとは限らない。そこで、ワーク移載装置1は、搬送テーブル11によって搬送台車3の位置決め誤差や床面の影響による誤差を吸収する。この搬送テーブル11を搬送台車3の各ストッカに設置しても同様の機能を得られるが、搬送テーブル11をワーク移載装置1側に設置することにより、搬送台車3におけるワークWの積載量をより多く確保することができる。   With the positioning accuracy of the transport carriage 3 as described above, the workpiece W stored in the multistage shelf 30 arranged in a three-dimensional manner is reliably transferred to the workpiece transfer device 1 due to unevenness of the floor surface and manufacturing errors. It cannot always be delivered. Therefore, the workpiece transfer apparatus 1 absorbs the positioning error of the transport carriage 3 and the error due to the influence of the floor surface by the transport table 11. Although the same function can be obtained even if this transport table 11 is installed in each stocker of the transport cart 3, the load of the work W on the transport cart 3 can be reduced by installing the transport table 11 on the work transfer device 1 side. More can be secured.

搬送台車3がワーク移載装置1の前に接岸すると、搬送テーブル11が前方へせり出され、搬送台車3の棚30に接触して水平面内での搬送テーブルの回転位置が自動調整される。また、このとき、棚30における左右位置検出用の開口部(図5における凹部31)と左右位置センサ17(不図示)とを用いて左右位置補正が行われる(図5参照)。   When the transport carriage 3 comes into contact with the workpiece transfer device 1, the transport table 11 protrudes forward, contacts the shelf 30 of the transport carriage 3, and the rotational position of the transport table within the horizontal plane is automatically adjusted. At this time, the left / right position correction is performed using the left / right position detection opening (the recess 31 in FIG. 5) and the left / right position sensor 17 (not shown) in the shelf 30 (see FIG. 5).

その後、上下に一定量、例えば、±20mmにわたって、高さ検出センサ15によって棚30の高さ位置がサーチされ、高さ位置補正が成される。上下のサーチ量については、搬送台車3を平面内の移動に限定しているので、大きくても高さの誤差は10mm以内となっており、余裕をもって20mmと設定されている。本実施例では、多段の棚30(ストッカ)の最下段のみこのサーチ動作を行い、以後その上の段の高さについては、一定の高さ(設計値)を加算して高さを決定している。左右方向については、最下段で得られた補正量をそのまま用いて搬送テーブル11の左右位置決めを行っている。   Thereafter, the height position of the shelf 30 is searched by the height detection sensor 15 over a certain amount, for example, ± 20 mm, and the height position is corrected. With respect to the upper and lower search amounts, the conveyance carriage 3 is limited to movement in a plane, so that even if it is large, the height error is within 10 mm, and is set to 20 mm with a margin. In this embodiment, this search operation is performed only for the lowermost stage of the multistage shelf 30 (stocker), and the height of the upper stage is determined by adding a certain height (design value) thereafter. ing. In the left-right direction, the left and right positioning of the transport table 11 is performed using the correction amount obtained in the lowermost stage as it is.

ここで、搬送テーブル11の高さ位置補正について説明する。図12(a)に示すように、搬送テーブル11の前面には、搬送台車3の各段の棚30の高さ位置を検出するための、高さ方向に並んだ2つの光電センサ5が設けられている。2つの光電センサ5は、高さ検出センサ15を構成するセンサである。また、搬送台車3の棚30には、高さ検出用の反射板15aが配設されている。   Here, the height position correction of the transport table 11 will be described. As shown in FIG. 12A, two photoelectric sensors 5 arranged in the height direction for detecting the height position of the shelf 30 of each stage of the transport carriage 3 are provided on the front surface of the transport table 11. It has been. The two photoelectric sensors 5 are sensors constituting the height detection sensor 15. Further, a reflection plate 15 a for height detection is disposed on the shelf 30 of the transport carriage 3.

光電センサ5は、光ビームを発射すると共に、その光ビームの反射光を検出するセンサである。光ビームが反射板15aに照射されると反射信号出力が得られ、光ビームが反射板15aから外れると反射信号出力は得られない。2つの光電センサ5の高さ方向の配置間隔は、両方の光電センサ5からの光ビームが、同時に反射板15aの高さ方向の幅に含まれ、かつ、高さ検出公差の範囲内の余裕のない間隔とされている。   The photoelectric sensor 5 is a sensor that emits a light beam and detects reflected light of the light beam. When the light beam is applied to the reflection plate 15a, a reflection signal output is obtained, and when the light beam deviates from the reflection plate 15a, no reflection signal output is obtained. The arrangement interval in the height direction of the two photoelectric sensors 5 is such that the light beams from both photoelectric sensors 5 are included in the height direction width of the reflector 15a at the same time, and there is a margin within the range of the height detection tolerance. There is no interval.

すなわち、搬送テーブル11の高さと、棚30の高さの差が、高さ検出公差よりも大きくなると、光電センサ5のいずれか一方による反射信号出力しか得られなくなる。この様子が、図12(b)(c)に示されている。このように構成された高さ検出センサ15によると、図12(a)に示すように、2つの光電センサ5からの反射信号出力が同時に得られる位置を、搬送テーブル11を昇降させながら探すことにより、搬送台車3の多段の棚30の高さ検出を容易に行うことができる。また、このような高さ検出によると、棚30の前面に所定幅の反射板15aを設けることは容易に行えるという利点がある。反射板15aは、反射シールなどを貼り付けるようにしてもよく、より容易である。   In other words, if the difference between the height of the transport table 11 and the height of the shelf 30 is larger than the height detection tolerance, only the reflected signal output from one of the photoelectric sensors 5 can be obtained. This is shown in FIGS. 12B and 12C. According to the height detection sensor 15 configured in this way, as shown in FIG. 12A, the position where the reflected signal outputs from the two photoelectric sensors 5 can be obtained simultaneously is searched for while raising and lowering the transport table 11. Thus, the height detection of the multistage shelves 30 of the transport carriage 3 can be easily performed. Further, according to such height detection, there is an advantage that it is easy to provide the reflector 15a having a predetermined width on the front surface of the shelf 30. The reflection plate 15a may be made easier by attaching a reflection seal or the like.

なお、本発明は、上述した各構成に限られることなく種々の変形が可能である。例えば、左右位置センサ17や左右動手段14は、必ずしも備える必要はない。このような左右位置に関する補正手段として、例えば、搬送テーブル11の上面左右に前方に向けて互いに広がったガイドレールを設けるようにしてもよい。また、棚30や棚20の段間の間隔は、必ずしも一定にする必要はなく、段間の各間隔データを、予めワーク移載装置1に記憶させたり、通信によってワーク移載装置1に伝達したりするようにしてもよい。この場合に、1回目の高さ位置補正後に、前記間隔データを参照して搬送テーブル11の昇降高さ設定をすることができる。また、ワーク移載装置1は、上述した実施形態における各構成を互いに組み合わせた構成とすることができる。   The present invention is not limited to the above-described configurations, and various modifications can be made. For example, the left / right position sensor 17 and the left / right moving means 14 are not necessarily provided. As such a correction means related to the left and right positions, for example, guide rails spreading toward the front may be provided on the upper left and right sides of the transfer table 11. Further, the interval between the shelves 30 and the shelves 20 is not necessarily constant, and each interval data between the steps is stored in the workpiece transfer device 1 in advance or transmitted to the workpiece transfer device 1 by communication. You may make it. In this case, after the first height position correction, the elevation height of the transfer table 11 can be set with reference to the interval data. Moreover, the workpiece transfer apparatus 1 can be configured by combining the configurations in the above-described embodiments.

また、上記において、ワーク収納棚2とワーク移載装置1とは別体である、との前提で説明したが、ワーク収納棚2をワーク移載装置1に含めるようにしてもよい。この場合、ワーク移載装置1とワーク収納棚2とを1つの共通フレーム内に納めることができる。また、ワーク移載装置1とワーク収納棚2とが別体か一体かにかかわらず、ワーク収納棚2の通信手段28を省略することができる。この場合、ワーク移載装置1の制御手段10がワーク収納棚2を直接制御するようにすればよい。   In the above description, the workpiece storage shelf 2 and the workpiece transfer device 1 are described as separate units. However, the workpiece storage shelf 2 may be included in the workpiece transfer device 1. In this case, the workpiece transfer device 1 and the workpiece storage shelf 2 can be stored in one common frame. Further, regardless of whether the workpiece transfer device 1 and the workpiece storage shelf 2 are separate or integrated, the communication means 28 of the workpiece storage shelf 2 can be omitted. In this case, the control means 10 of the workpiece transfer apparatus 1 may directly control the workpiece storage shelf 2.

本発明の一実施形態に係る搬送台車用ワーク移載装置を、搬送台車と収納棚と共に示したブロック構成図。The block block diagram which showed the workpiece transfer apparatus for conveyance trolleys which concerns on one Embodiment of this invention with the conveyance trolley and the storage shelf. 同上ワーク移載装置を、搬送台車および収納棚と共に示した側面図。The side view which showed the workpiece transfer apparatus same as the above with the conveyance trolley | bogie and the storage shelf. 同上ワーク移載装置における搬送テーブルの斜視図。The perspective view of the conveyance table in a workpiece transfer apparatus same as the above. (a)(b)は同上ワーク移載装置における搬送テーブルに設けられた左右位置センサの動作を説明する平面図。(A) (b) is a top view explaining operation | movement of the left-right position sensor provided in the conveyance table in a workpiece transfer apparatus same as the above. (a)(b)は同上ワーク移載装置における搬送テーブルが反力により回転位置補正をする様子を示す平面図。(A) (b) is a top view which shows a mode that the conveyance table in a workpiece transfer apparatus same as the above correct | amends rotational position by reaction force. (a)〜(g)は同上ワーク移載装置によるワーク移載の様子を時系列的に示す模式図。(A)-(g) is a schematic diagram which shows the mode of the workpiece transfer by a workpiece transfer apparatus same as the above in time series. 同上ワーク移載装置を用いたワーク移載の手順を説明するフローチャート。The flowchart explaining the procedure of the workpiece transfer using a workpiece transfer apparatus same as the above. 同上ワーク移載装置を用いたワーク移載の他の手順を説明するフローチャート。The flowchart explaining the other procedure of the workpiece transfer using a workpiece transfer apparatus same as the above. 本発明の搬送台車用ワーク移載装置の実施例を収納棚と共に示す側面図。The side view which shows the Example of the workpiece transfer apparatus for conveyance trolleys of this invention with a storage shelf. 同上ワーク移載装置の正面図。The front view of a workpiece transfer apparatus same as the above. (a)は同上ワーク移載装置がワークを授受する対象である搬送台車の実施例を示す正面図、(b)は同側面図。(A) is the front view which shows the Example of the conveyance trolley | bogie which is the object which a workpiece transfer apparatus same as the above delivers / receives a workpiece | work, (b) is the side view. (a)(b)(c)は同上ワーク移載装置において搬送台車に対する搬送テーブルの高さ位置合わせの様子を示す側面図。(A) (b) (c) is a side view which shows the mode of the height alignment of the conveyance table with respect to a conveyance trolley in a workpiece transfer apparatus same as the above.

符号の説明Explanation of symbols

1 ワーク移載装置
2 ワーク収納棚
3 搬送台車
11 搬送テーブル
12 昇降手段
13 前後動手段
14 左右動手段
15 高さ検出センサ
16 接岸センサ
17 左右位置センサ
18 通信手段
W ワーク
DESCRIPTION OF SYMBOLS 1 Work transfer apparatus 2 Work storage shelf 3 Conveyance cart 11 Conveyance table 12 Lifting means 13 Forward / backward movement means 14 Left / right movement means 15 Height detection sensor 16 Bank contact sensor 17 Left / right position sensor 18 Communication means W Workpiece

Claims (7)

高さ方向に多段に積載されたワークを搬送する搬送台車とワーク収納棚との間でワークを移載するワーク移載装置において、
搬送台車またはワーク収納棚からワークを受け取り、前記受け取ったワークをワーク収納棚または搬送台車に受け渡すワーク移載用の搬送テーブルと、
前記搬送テーブルを昇降動させる昇降手段と、
前記搬送テーブルをワーク授受方向である前後に移動させる前後動手段と、
搬送台車との間で通信を行う通信手段と、
前記通信手段を用いた通信によって得られたワーク積載位置の情報に基づいて前記昇降手段と前後動手段とを制御して前記搬送テーブルを動作制御する制御手段と、を備え、
前記制御手段は、搬送台車がワーク移載装置の前に停止し、ワークの移載を完了してワーク移載装置から離脱するまでの間の搬送台車との最初のワーク授受に際し、搬送台車におけるワーク積載段の高さを検出する高さ検出センサからの信号に基づいて前記搬送テーブルの高さ位置補正を行い、次以降のワーク授受については前記高さ位置補正と既知の段間の高さ間隔とに基づいて高さ位置補正を行うことを特徴とするワーク移載装置。
In a workpiece transfer device that transfers workpieces between a transport carriage and workpiece storage shelves that transport workpieces stacked in multiple stages in the height direction,
A workpiece transfer table for receiving workpieces from a conveyor cart or a workpiece storage shelf, and transferring the received workpiece to the workpiece storage shelf or the conveyor cart;
Elevating means for elevating and lowering the transfer table;
Back-and-forth movement means for moving the transfer table back and forth in the workpiece transfer direction;
A communication means for communicating with the transport carriage;
Control means for controlling the operation of the transfer table by controlling the elevating means and the forward / backward movement means based on the information of the workpiece loading position obtained by communication using the communication means,
The control means stops the transfer carriage before the workpiece transfer device, completes the transfer of the workpiece, and transfers the first workpiece to and from the transfer cart until the workpiece is transferred from the workpiece transfer device . Based on the signal from the height detection sensor that detects the height of the work loading stage, the height position of the transfer table is corrected, and for the subsequent workpiece transfer, the height position correction and the known height between the stages are performed. A workpiece transfer apparatus that performs height position correction based on the interval.
前記搬送テーブルを水平面内で授受方向に直交する方向に移動させる左右動手段と、
前記搬送テーブルに設けられ搬送台車の左右の位置ずれを検出する左右位置センサと、をさらに備え、
前記制御手段は、搬送台車がワーク移載装置の前に停止し、ワークの移載を完了してワーク移載装置から離脱するまでの間の搬送台車との最初のワーク授受に際し、前記左右位置センサからの信号に基づいて、前記左右動手段を制御して前記搬送テーブルの左右位置補正を行い、次以降のワーク授受については、前記左右位置補正の位置に基づいて左右位置補正を行うことを特徴とする請求項1に記載のワーク移載装置。
A left-right moving means for moving the transfer table in a direction perpendicular to the delivery direction in a horizontal plane;
A left and right position sensor provided on the transfer table for detecting a left and right position shift of the transfer carriage;
The control means is configured so that the left-right position is determined when the transfer carriage is stopped before the workpiece transfer device, and when the workpiece is transferred from the workpiece transfer device until the workpiece transfer is completed. Based on the signal from the sensor, the left / right movement means is controlled to correct the left / right position of the transfer table, and for the subsequent workpiece transfer, the left / right position correction is performed based on the position of the left / right position correction. The workpiece transfer apparatus according to claim 1, wherein the workpiece transfer device is characterized in that:
前記制御手段は、搬送台車におけるワーク積載位置の情報に基づいて、多段のワーク積載位置の最も中央に近い段について最初にワーク授受を行うことを特徴とする請求項1または請求項2に記載のワーク移載装置。   The said control means performs workpiece | work transfer first about the stage nearest to the center of a multistage workpiece | work loading position based on the information of the workpiece | work loading position in a conveyance trolley, The Claim 1 or Claim 2 characterized by the above-mentioned. Workpiece transfer device. 前記制御手段は、搬送台車におけるワーク積載位置の情報に基づいて、最下段と最上段のワーク積載位置について、それぞれ前記高さ検出センサからの信号に基づいて前記搬送テーブルの高さ位置補正を行って最初の2回のワーク授受を行い、他の段については、前記高さ位置補正によって得られた補正量を比例配分して高さ位置補正を行うことを特徴とする請求項1または請求項2に記載のワーク移載装置。   The control means corrects the height position of the transfer table based on a signal from the height detection sensor for each of the lowermost and uppermost work load positions based on the information of the work load positions on the transfer carriage. The first and second workpieces are exchanged, and the height position correction is performed by proportionally allocating the correction amount obtained by the height position correction for the other stages. 2. The workpiece transfer apparatus according to 2. ワーク授受に必要な搬送テーブルの位置精度に応じて、前記高さ検出センサまたは前記左右位置センサに基づく位置補正箇所を追加することを特徴とする請求項に記載のワーク移載装置。 The workpiece transfer apparatus according to claim 2 , wherein a position correction position based on the height detection sensor or the left / right position sensor is added according to the position accuracy of the transfer table necessary for workpiece transfer. 前記高さ検出センサは、各段の左右2ヶ所の高さを検出するセンサであり、検出した左右の高さの平均高さに基づいて前記搬送テーブルの高さ位置補正を行うことを特徴とする請求項1乃至請求項5のいずれか一項に記載のワーク移載装置。   The height detection sensor is a sensor that detects the heights of the left and right positions of each stage, and performs the height position correction of the transport table based on the average height of the detected left and right heights. The workpiece transfer apparatus according to any one of claims 1 to 5. ワーク授受に必要な搬送テーブルの位置精度に応じて、前記高さ検出センサに基づく位置補正箇所を追加することを特徴とする請求項1乃至請求項6のいずれか一項に記載のワーク移載装置。  The workpiece transfer according to any one of claims 1 to 6, wherein a position correction location based on the height detection sensor is added in accordance with the position accuracy of the transfer table necessary for workpiece transfer. apparatus.
JP2008178436A 2008-07-08 2008-07-08 Work transfer equipment for transport cart Expired - Fee Related JP5372422B2 (en)

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