JP3616482B2

JP3616482B2 - Packaging bag feeder

Info

Publication number: JP3616482B2
Application number: JP24469697A
Authority: JP
Inventors: 純彰黒川
Original assignee: Furukawa Mfg Co Ltd
Current assignee: Furukawa Mfg Co Ltd
Priority date: 1997-08-25
Filing date: 1997-08-25
Publication date: 2005-02-02
Anticipated expiration: 2017-08-25
Also published as: JPH1159624A

Description

【０００１】
【発明の属する技術分野】
本発明は、断続回転するロータリ式の袋詰め包装機に対して包装用の袋を一定の時間間隔で供給する装置に関する。
【０００２】
【従来の技術】
従来、実開平５−４２１０７号公報には、図５に示すごとく、重なり合った袋の層３を矢印４の方向に緩やかな速度で運搬するベルトコンベヤ１の上域に、前記コンベヤ１よりも高速回転する傾斜ベルト２を設け、この傾斜ベルト２によって袋を最上面から１枚ずつストッパー６に向けて送り込む装置を開示している。なお当該装置は支持板７に積み重ねられていく袋層５ａの厚みが限界に達すると、揺動竿８がスイッチ９にタッチするので、傾斜ベルト２の回転は停止して袋の送り込みを中断する仕組みになっており、一方レバー１０に支持した真空カップ１１は袋を１枚ずつ袋詰め包装機に供給する。
【０００３】
【発明が解決しょうとする課題】
袋の供給において最も重要な点は、図６に示すごとく袋５に吸い付いた真空カップ１１の中心から袋上縁５ｂまでの間隔１２を常に一定に保つことである。そうでなければ後に袋詰め機において袋口縁５ｂに施される熱シール領域が不一致になり不良品が続出する。かかる点から観察すると、図５の装置は支持板７の上に一定の厚みの袋層５ａを保持し、該袋層５ａ全体の重みで各袋の波打ち状の歪みを矯正すると共に、傾斜ベルト２の回転から生ずる付勢力で袋層５ａをストッパー６に突き当てるようにしている。しかし、かかる要件が必ずしも最上位の袋を確実にストッパーに押し当てる保証にはならない。すなわち真空カップ１１が最上位の袋を繰り返し持ち上げるとき、上下の袋間に生じる静電気や負圧現象によって、その下の袋の位置が変位する。
【０００４】
【課題を解決するための手段】
本発明は、各袋を確実にストッパーに突き当てて保持するために、ベルトコンベヤに搭載し且つ鎧状に重ねて運搬する多数の縦列袋を、前記ベルトコンベヤ上域の補助ベルトとで、前記ベルトコンベヤに連続する支持板上のストッパーに押し当てて積み重ねると共に、前記袋の進行方向に沿って配置しかつ基端のピンを軸に上下に揺動自在な竿先端の断面 L 字型の定規板内側直角隅部を前記の積み重ねた袋層後端コーナに係合しながら、前記ストッパーの面に沿って前記袋を積み上げ上面から取り出す構成の袋供給装置において、前記袋層に対する前記定規板の重量負荷を軽減するために、前記袋の進行方向に向けて前記定規板の手前側に、下辺が直接前記袋層の上面に接する補助板を連結して構成する。
【０００５】
【作用】
ベルトコンベヤに搭載して運搬される縦列袋が該ベルトコンベヤのエンド部に達すると、上域の補助ベルトの回転で前記縦列袋は前方のストッパーに向けて送り込まれる。この場合先の袋の下に後続の袋が次々と差し込まれかつ積み重ねられる袋層の後端コーナに直角隅部を沿わせる定規板は、袋層の後端が馬尻のごとく持ち上がっても、常に最上位の袋コーナに添って前記ストツパーと該定規板との間で袋層の横ずれを防ぐが、同袋層に加わる前記定規板の重量を、縦列袋の上に接する保持板により軽減するから、袋層の下に後続の袋を歪みなく供給できる。
【０００９】
【実施例】
図１において、２個のプーリ１５，１６に支持しかつ上面を水平に配置したベルトコンベヤ２０は、チェン１７を介して繋がれた第１モータ１８の駆動力でもって回転し、上面に鎧状に重ねて搭載した多数の縦列袋１９を一定のスピードで運搬する。この場合縦列袋１９には上からチエンを繋げて形成したフレキシブル材２１が負荷し、ベルトコンベヤ２０と縦列袋１９との摩擦を確実にする。
【００１０】
前記ベルトコンベヤ２０の側方に設置した方形枠２２に２本の平行リンク２３，２４を上下方向に揺動自在に支持すると共に、これら平行リンクの先端に三角板２５を支持し、この三角板の３コーナに設けた３個のプーリの回りに補助ベルト２６を支持する。前記方形枠２２の内部に設けた第２モータ２７の回転軸２８は前記平行リンクの支持軸としての機能をもち、該回転軸２８に固定したプーリ２９と、前記三角板頂点のプーリ３０との間に伝動ベルト３１を介設しているので、第２モータ２７の回転動力は常時前記補助ベルト２６に伝えられる。
【００１１】
前記ベルトコンベヤ２０の前方に、該ベルトコンベヤの上面と面一で支持板３８が存在するので、前記補助ベルト２６の回転運動によってベルトコンベヤ２０上面の縦列袋１９は支持板上のストッパー３９に向けて送り込まれる。この場合、上位の袋の下に次々と後続の袋を差し込む形となるので、支持板の上に袋の層１９ａが積み上げられ、回転軸４０の動力で上下に揺動するブロック４１に設けた真空カップ４２は袋に吸着し、これら袋を次々と運び出す。
【００１２】
図２に示すごとく袋層１９ａの上方には、袋の両側間に干渉棒４４を架設している。図３に示すごとく当該干渉棒４４は、ブロック４１の回転軸４０中心と、真空カップ４２の中心との中間あたりに設置しているので、真空カツプ４２が上方に持ち上がるとき袋１９は前記干渉棒４４にスライドして上方に引き出されるので、このときの摩擦によって下方の袋はストッパー３９に向けてせり出す。
【００１３】
図１に示すごとく、前記方形枠に基端のピン４６を介して上下方向に揺動自在に支持した揺動竿４７の先端には、枢支ピン４８を介して定規板４９を回転自在に支持するが、図３のごとく前記定規板のほぼ直角に折り曲げた内部隅部５０が袋層１９ａの後方コーナに沿うように、該定規板４９の重量を袋層に負荷させ、ストッパー３９との間で袋の遊び動きを制限している。
【００１４】
前記定規板４９は、その下側に押し込まれる袋の量に応じて揺動竿４７は上下動するが、突子５２が第１センサー５３に接近し過ぎると、コントローラ５４を通して停止信号が第１モータ１８に送られ、該第１モータ１８による縦列袋１９の給送を停止し、逆に袋の減少で突子５２が第１センサー５３から離れると第１モータ１８は再び回転する
【００１５】
図２において両側２個のストッパー３９の間で袋層１９ａの先端に圧し掛かる検出板５５は、軸受け５６に支持した軸５７を支点にして上下に揺動自在であり、図１において支持板３８上の袋層１９ａの厚みが制限値を越え、軸５７に設けた検出レバー５８が第２センサー５９から離れると、コントローラ６０を通して送られる信号によって半月偏芯カム６１は９０度角だけ回転する。この場合半月偏芯カム６１に接する滑車６２を介して平行リンク２３は回転軸２８を支点に補助ベルト２６を吊り上げ、袋の搬入を停止する。
【００１６】
なお図４に示すごとく、既に述べた半月偏心カム６１の回転は、同カム６１の支軸６４に固定したピニオン６６にラック歯６７を噛み合わせ、このラック歯をアクチュエータ６８で上下動させて行う。すなわち、既に述べた第２センサー５９の開閉で２位置４ポート弁６９を切り替え、コンプレッサー７０の吐出圧力をアクチュエータ６８の上下室に選択供給してラック歯６７を上下動させる。
【００１７】
図１においてベルトコンベヤ２０を支えるフレーム７１及び方形枠２２は共に雌ねじを刻んだ部材７２を介してねじ棒７３に係合している。従ってハンドル７４で前記ねじ棒７３を回転することにより、ベルトコンベヤ２０及び、方形枠２２に支持した補助ベルト２６はそれぞれ一体に前後動する。詳しくは図３において上下のベルト２０，２６を支える先端のプーリの中心を矢印Ｘ，Ｙの方向に任意に移動させることができ、同時に定規板４９も一体に移動し、袋層１９ａの長さの変更に対応させることができる。
【００１８】
図７に示すように例えば袋口に面フアスナー７５を備える袋は、開口する袋の底面を先頭に移動する関係上、袋層１９aの後端が極端に分厚くなって該部分で重量が大きくなる。このような袋の後端にさらに定規板４９の重量が加算されると、袋層１９aの下方に挿入される袋に対しての抵抗がそれだけ大きくなり、摩擦によって袋の歪みが大きくなる。そこで定規板４９の後方に、下辺変が直線的な補助板７６を設け、該補助板７６をベルトコンベヤ２０上の縦列袋１９に負荷させて、定規板４９の袋後端に対する負荷を少なくした。
【００１９】
前記実施例によると、ベルトコンベヤ２０上の袋の厚みが増えて揺動竿４７が上動して第１センサー５３が開放すると、第１モータ１８が止まり、反対に、揺動竿４７の下動で第１センサー５３が閉鎖すると第１モータ１８は駆動し始める（図８参照のこと）が、ただし補助ベルト２６が下降して袋に接触している状態でない限り第１モータ１８は駆動しないようになっている。つまり図７での袋層１９ａの厚みが限界値以下に減少すると、第２センサー５９は閉鎖し、図８の電磁弁のコイル６９ａを励磁して図１の半月カム６１の回転で補助ベルト２６を下降させる。要するに図８で２個のセンサー５３，５９が閉鎖しない限り第１モータ１８は電源７７につながらないので、図７で補助ベルト２６がベルトコンベヤ２０上の縦列袋に接触しているときのみベルトコンベヤ２０は回転し、袋をストッパー３９の方向に送り込む。
【００２０】
なお、図７で真空カップ４２が袋層１９ａの袋を取り除くたびに、袋が検出板５５に触れて第２センサー５９を不用意に開閉させるが、図８に置ける自己保持回路８０は、センサー５９が不用意な動きをする間だけ、該センサー５９を仮想閉鎖状態に置くような回路の自己保持をする。
【図面の簡単な説明】
【図１】全体の側面図
【図２】前図の部分的な平面図
【図３】前図の側面図
【図４】半月偏心カムの操作機構の説明図
【図５】従来例の説明図
【図６】従来例の説明図
【図７】他の実施例を示す側面図
【図８】電気回路図
【符号の説明】
１８…‥第１モータ１９…‥縦列袋２０…‥ベルトコンベヤ２６…‥補助ベルト２７…‥第２ベルト３３…‥支持板３９…‥ストッパー４１…‥ブロック４２…‥真空カップ４４…‥干渉棒４７…‥揺動竿４９…‥定規板５０…‥直角隅部５３…‥第１センサー５５…‥検出板５８…‥検出レバー５９…‥第２センサー６１…‥半月偏心カム７３…‥ねじ棒[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for supplying packaging bags at regular time intervals to a rotary-type bag filling and packaging machine that rotates intermittently.
[0002]
[Prior art]
Conventionally, in Japanese Utility Model Publication No. 5-42107, as shown in FIG. 5, the upper layer of the belt conveyor 1 that conveys the layer 3 of overlapping bags at a moderate speed in the direction of the arrow 4 is faster than the conveyor 1. An apparatus is disclosed in which a rotating inclined belt 2 is provided, and bags are fed one by one from the uppermost surface toward the stopper 6 by the inclined belt 2. When the thickness of the bag layer 5a stacked on the support plate 7 reaches the limit, the apparatus touches the switch 9, so that the rotation of the inclined belt 2 stops and the bag feeding is interrupted. On the other hand, the vacuum cup 11 supported by the lever 10 supplies the bags one by one to the bagging and packaging machine.
[0003]
[Problems to be solved by the invention]
As shown in FIG. 6, the most important point in supplying the bag is to always maintain a constant distance 12 from the center of the vacuum cup 11 attracted to the bag 5 to the bag upper edge 5b. Otherwise, the heat sealing area to be applied to the bag rim 5b later in the bagging machine becomes inconsistent, and defective products continue. From this point of view, the apparatus of FIG. 5 holds the bag layer 5a having a constant thickness on the support plate 7, corrects the wavy distortion of each bag with the weight of the bag layer 5a as a whole, and tilts the belt. The bag layer 5 a is abutted against the stopper 6 by the urging force generated from the rotation of 2. However, such a requirement does not necessarily guarantee that the uppermost bag is pressed against the stopper. That is, when the vacuum cup 11 repeatedly lifts the uppermost bag, the position of the lower bag is displaced by static electricity or a negative pressure phenomenon generated between the upper and lower bags.
[0004]
[Means for Solving the Problems]
In the present invention, in order to securely hold each bag against the stopper, a plurality of tandem bags that are mounted on a belt conveyor and carried in an armor shape are transported together with an auxiliary belt in the upper area of the belt conveyor. A ruler with an L -shaped cross-section at the tip of the heel that is pressed against the stopper on the support plate that is continuous with the belt conveyor and is stacked along the direction of travel of the bag and swings up and down around the base pin. In the bag supply device configured to take out the bag from the upper surface along the surface of the stopper while engaging the right-angled corner on the inner side with the stacked bag layer rear end corner, the ruler plate with respect to the bag layer In order to reduce the weight load, an auxiliary plate whose lower side is in direct contact with the upper surface of the bag layer is connected to the front side of the ruler plate in the traveling direction of the bag .
[0005]
[Action]
When the longitudinal bag carried on the belt conveyor reaches the end portion of the belt conveyor, the longitudinal bag is fed toward the front stopper by the rotation of the upper auxiliary belt. In this case, the ruler plate that runs along the right-angled corner to the rear end corner of the bag layer in which subsequent bags are successively inserted and stacked under the previous bag is always used even if the rear end of the bag layer is lifted up like a horse's bottom. The lateral displacement of the bag layer between the stopper and the ruler plate along the uppermost bag corner is prevented, but the weight of the ruler plate applied to the bag layer is reduced by the holding plate in contact with the tandem bag. Subsequent bags can be supplied without distortion under the bag layer.
[0009]
【Example】
In FIG. 1, a belt conveyor 20 supported by two pulleys 15 and 16 and having an upper surface disposed horizontally is rotated by a driving force of a first motor 18 connected via a chain 17 and has an armor shape on the upper surface. A large number of tandem bags 19 mounted in a stacked manner are transported at a constant speed. In this case, the flexible bag 21 formed by connecting chains from above is loaded on the column bag 19 to ensure the friction between the belt conveyor 20 and the column bag 19.
[0010]
Two parallel links 23 and 24 are supported on a rectangular frame 22 installed on the side of the belt conveyor 20 so as to be swingable in the vertical direction, and a triangular plate 25 is supported at the tip of these parallel links. The auxiliary belt 26 is supported around three pulleys provided at the corner. The rotation shaft 28 of the second motor 27 provided inside the rectangular frame 22 functions as a support shaft for the parallel link. Between the pulley 29 fixed to the rotation shaft 28 and the pulley 30 at the apex of the triangular plate. Since the transmission belt 31 is interposed, the rotational power of the second motor 27 is always transmitted to the auxiliary belt 26.
[0011]
Since the support plate 38 is in front of the belt conveyor 20 and flush with the upper surface of the belt conveyor 20, the tandem bags 19 on the upper surface of the belt conveyor 20 are directed toward the stoppers 39 on the support plate by the rotational movement of the auxiliary belt 26. Sent in. In this case, since the subsequent bags are inserted one after another under the upper bag, the bag layer 19a is stacked on the support plate, and is provided in the block 41 that swings up and down by the power of the rotating shaft 40. The vacuum cup 42 is adsorbed by the bags and carries them one after another.
[0012]
As shown in FIG. 2, an interference bar 44 is installed above both sides of the bag above the bag layer 19a. As shown in FIG. 3, the interference bar 44 is installed in the middle between the center of the rotating shaft 40 of the block 41 and the center of the vacuum cup 42, so that when the vacuum cup 42 is lifted upward, the bag 19 is Since it slides to 44 and is pulled upward, the lower bag protrudes toward the stopper 39 due to friction at this time.
[0013]
As shown in FIG. 1, a ruler plate 49 can be rotated via a pivot pin 48 at the tip of a swing rod 47 supported on the square frame so as to be swingable in the vertical direction via a pin 46 at the base end. As shown in FIG. 3, the weight of the ruler plate 49 is applied to the bag layer so that the inner corner 50 bent substantially at a right angle of the ruler plate follows the rear corner of the bag layer 19a as shown in FIG. The play movement of the bag is restricted between.
[0014]
In the ruler plate 49, the swinging rod 47 moves up and down in accordance with the amount of the bag pushed into the lower side of the ruler plate 49, but if the protrusion 52 is too close to the first sensor 53, a stop signal is sent through the controller 54. The feeding of the parallel bag 19 by the first motor 18 is stopped, and when the protrusion 52 moves away from the first sensor 53 due to the reduction of the bag, the first motor 18 rotates again.
Detecting plate 55 applied pressure to the tip of the bag layer 19a between the sides two stoppers 39 in FIG. 2 is a vertically swingably by a shaft 57 which is supported by a bearing 56 as a fulcrum, the support plate 38 in FIG. 1 When the thickness of the upper bag layer 19a exceeds the limit value and the detection lever 58 provided on the shaft 57 is separated from the second sensor 59, the half-moon eccentric cam 61 is rotated by 90 degrees by a signal sent through the controller 60. In this case, the parallel link 23 lifts the auxiliary belt 26 about the rotating shaft 28 via the pulley 62 in contact with the half-moon eccentric cam 61, and stops carrying in the bag.
[0016]
As shown in FIG. 4, the rotation of the half-moon eccentric cam 61 described above is performed by meshing rack teeth 67 with a pinion 66 fixed to a support shaft 64 of the cam 61 and moving the rack teeth up and down by an actuator 68. . That is, the two-position four-port valve 69 is switched by opening / closing the second sensor 59 already described, and the discharge pressure of the compressor 70 is selectively supplied to the upper and lower chambers of the actuator 68 to move the rack teeth 67 up and down.
[0017]
In FIG. 1, both the frame 71 and the rectangular frame 22 that support the belt conveyor 20 are engaged with the threaded rod 73 via a member 72 that has a female thread. Therefore, by rotating the screw rod 73 with the handle 74, the belt conveyor 20 and the auxiliary belt 26 supported by the rectangular frame 22 move back and forth integrally. Specifically, in FIG. 3, the center of the pulley at the tip end supporting the upper and lower belts 20 and 26 can be arbitrarily moved in the directions of arrows X and Y. At the same time, the ruler plate 49 is also moved together, and the length of the bag layer 19a. Can be changed.
[0018]
As shown in FIG. 7, for example, a bag having a surface fastener 75 at the bag mouth moves to the top of the bottom surface of the opened bag, so that the rear end of the bag layer 19a becomes extremely thick and the weight increases at that portion. . If the weight of the ruler plate 49 is further added to the rear end of such a bag, the resistance against the bag inserted below the bag layer 19a increases accordingly, and the distortion of the bag increases due to friction. Therefore, an auxiliary plate 76 having a linear lower side is provided behind the ruler plate 49, and the auxiliary plate 76 is loaded on the longitudinal bag 19 on the belt conveyor 20 to reduce the load on the rear end of the ruler plate 49 on the bag. .
[0019]
According to the embodiment, when the thickness of the bag on the belt conveyor 20 increases and the swing rod 47 moves upward and the first sensor 53 is opened, the first motor 18 stops and, conversely, below the swing rod 47 When the first sensor 53 is closed by movement, the first motor 18 starts to be driven (see FIG. 8). However, the first motor 18 is not driven unless the auxiliary belt 26 is lowered and is in contact with the bag. It is like that. That is, when the thickness of the bag layer 19a in FIG. 7 decreases below the limit value, the second sensor 59 closes, the coil 69a of the electromagnetic valve in FIG. 8 is excited, and the auxiliary belt 26 is rotated by the rotation of the half-moon cam 61 in FIG. Is lowered. In short, since the first motor 18 is not connected to the power source 77 unless the two sensors 53 and 59 are closed in FIG. 8, the belt conveyor 20 is only connected when the auxiliary belt 26 is in contact with the tandem bag on the belt conveyor 20 in FIG. 7. Rotates and feeds the bag in the direction of the stopper 39.
[0020]
In addition, whenever the vacuum cup 42 removes the bag of the bag layer 19a in FIG. 7, the bag touches the detection plate 55 to inadvertently open and close the second sensor 59, but the self-holding circuit 80 in FIG. Only while 59 is inadvertently moving is the circuit self-holding to place the sensor 59 in a virtual closed state.
[Brief description of the drawings]
[Fig. 1] Overall side view [Fig. 2] Partial plan view of the previous diagram [Fig. 3] Side view of the previous diagram [Fig. 4] Explanatory diagram of the operating mechanism of the half-moon eccentric cam [Fig. FIG. 6 is an explanatory diagram of a conventional example. FIG. 7 is a side view showing another embodiment. FIG. 8 is an electric circuit diagram.
18 ... 1st motor 19 ... Parallel bag 20 ... Belt conveyor 26 ... Auxiliary belt 27 ... 2nd belt 33 ... Support plate 39 ... Stopper 41 ... Block 42 ... Vacuum cup 44 ... Interference bar 47 ... Swing rod 49 ... Ruler plate 50 ... Right angle corner 53 ... First sensor 55 ... Detection plate 58 ... Detection lever 59 ... Second sensor 61 ... Half moon eccentric cam 73 ... Screw rod

Claims

A large number of tandem bags mounted on a belt conveyor and transported in an armor shape are pressed against a stopper on a support plate continuous with the belt conveyor and stacked together with an auxiliary belt on the belt conveyor. The cross-section of the tip of the rod, which is arranged along the direction of travel of the rod and can swing up and down around the base pin L In the bag supply device configured to stack the bag along the surface of the stopper and take out the bag from the upper surface while engaging the right-angled corners inside the ruler plate with the stacked bag layer rear end corner, the bag layer In order to reduce the weight load of the ruler plate, an auxiliary plate whose lower side is in direct contact with the upper surface of the bag layer is connected to the front side of the ruler plate in the traveling direction of the bag.