【０００１】
【発明の属する技術分野】
本発明は射出成形機用金型交換台車の改良及びこの金型交換台車を利用した射出成形機レイアウトの改良に関する。
【０００２】
【従来の技術】
例えば、特公平４−６５３１号公報「一群の合成樹脂射出成形機のための成形型交換装置」の第１０図に、レール状のガイド４５（符号は公報記載のものを流用する。以下同じ）を布設し、このガイド４５に移動台車２７を走行自在に載せ、ガイド４５の脇で且つ図左上側に小型の射出成形機を配置し、図左下側に中型の射出成形機を配置し、図右上側に成形型保管ステーション４４を配置し、図右下側に大型の射出成形機を配置し、小型・中型・大型の射出成形機から成形型交換テーブル１９，１９，１９を各々延ばした射出成形機のレイアウトが示されている。
【０００３】
例えば、成形型保管ステーション４４に保管してある成形型を移動台車２７に載せ、この移動台車２７を中型の射出成形機まで移動し、そこで移動台車２７から成形型交換テーブル１９へ成形型を移し、次に成形型交換テーブル１９から中型の射出成形機へ成形型を移す要領で成形型を移動する。この要領で、小型・中型・大型の射出成形機と成形型保管ステーション４４との間に成形型を往復させることで成形型の交換を行うことができるというものである。
【０００４】
【発明が解決しようとする課題】
上記公報の第１０図から明らかなように、小型・中型・大型の射出成形機の各々に成形型交換テーブル１９，１９，１９を付属しなければならない。この結果、成形型交換テーブル１９，１９，１９の費用が嵩む。
また、第１０図から明らかなように、小型の射出成形機のガイド４５側の面と、中型の射出成形機のガイド４５側の面とを揃えているため、ガイド４５から遠い方の面は不揃いになる。ガイド４５から遠い方の面は作業者の点検通路に臨み、この様に不揃いであると作業者の動線が蛇行し、作業者が射出成形機に接触しやすくなり作業者の負担が増す。
すなわち、従来の射出成形機レイアウトでは成形型交換テーブルを常備したり、点検通路側で射出成形機の面が不揃いになるため、これらの改善が求められている。
【０００５】
【課題を解決するための手段】
上記要望に応えるべく請求項１は、金型を支えると共に金型の高さを調整することのできる昇降台を備えた台車フレームと、この台車フレームに第１昇降手段を介して取付けた少なくとも３個の第１車輪と、台車フレームに第２昇降手段を介して取付けた少なくとも３個で且つ第１車輪に直交配置した第２車輪と、台車走行時に第１車輪と第２車輪の一方のみをレールに接触させるべく第１・第２昇降手段を制御する制御部と、から射出成形機用金型交換台車を構成する。
【０００６】
この金型交換台車は、いわゆるｘ−ｙ走行可能台車であり、射出成形機に平行に及び直角に走行させることができる。射出成形機に直角に走行させることができるので、従来付属していた成形型交換テーブルを省くことができる。加えて、台車フレームに昇降台を備えたので、金型の高さを自在に調整することができ、大小各種サイズの金型を１基の金型交換台車で賄うことができる。
【０００７】
請求項２は、共用レールに沿って少なくとも２基の射出成形機を直列に配置し、共用レールから直角に射出成形機に向って分岐レールを各々延ばし、共用レール並びに分岐レールに請求項１記載の射出成形機用金型交換台車を走らせるように射出成形機をレイアウトする。
【０００８】
射出成形機に直角に走行させることができるので、従来付属していた成形型交換テーブルを省くことができる。加えて、台車フレームに昇降台を備えたので、金型の高さを自在に調整することができ、大小各種サイズの金型を１基の金型交換台車で賄うことができる。
【０００９】
請求項３は、共用レールに臨む射出成形機の面をレール側面、共用レールから遠い方の面を作業側面といい、射出成形機の装置長さを機長、これに直交する装置幅を機幅といい、複数の射出成形機の機幅が異なるときには、複数の射出成形機は分岐レールの長さを異ならせることで、複数の射出成形機の作業側面を揃えることで射出成形機をレイアウトする。
【００１０】
複数の射出成形機は分岐レールの長さを異ならせることで、複数の射出成形機の作業側面を揃える。この結果、作業動線が直線になり、作業者が射出成形機に接触する心配が減り、作業者の負担を大幅に低減することができる。
【００１１】
【発明の実施の形態】
本発明の実施の形態を添付図に基づいて以下に説明する。なお、図面は符号の向きに見るものとする。
図１は本発明に係る射出成形機用金型交換台車の側面図であり、射出成形機用金型交換台車（以下「金型交換台車」と略記する。）１０は、新旧の金型１１，１２を支えると共に金型１１，１２の高さを調整することのできる昇降台２０を備えた台車フレーム１３と、この台車フレーム１３に第１昇降手段１４を介して取付けた少なくとも３個の第１車輪１５・・・（・・・は複数を示す。以下同じ）と、台車フレーム１３に第２昇降手段１６を介して取付けた少なくとも３個で且つ前記第１車輪１５に直交配置した第２車輪１７・・・と、台車走行時に第１車輪１５・・・と第２車輪１７・・・の一方のみをレールに接触させるべく第１・第２昇降手段１５，１７を制御する制御部１９と、からなる。
【００１２】
具体例として昇降台２０は、台板２１とＸリンク２２と昇降シリンダ２３とからなり、昇降シリンダ２３の作用で台車フレーム１３を起点にして台板２１を上昇又は下降させるパンタグラフリンク式昇降機構である。しかし、昇降台２０は、台板２１をシリンダで直接的に昇降させるものでもよく、又は前記Ｘリンク２２を平行リンクに変更することも可能であるから、昇降台２０の昇降機構は任意に選択してよい。
【００１３】
図２（ａ），（ｂ）は本発明で採用する昇降式車輪の正面図及び側面図である。
（ａ）に示す通り、台車フレーム１３に第１昇降手段１４を固定し、この第１昇降手段１４から下へ延びるアクチエータ軸２５にフォーク部材２６を固定し、このフォーク部材２６に車軸２７を回転可能に取付けることで、第１昇降手段１４に第１車輪１５を取付ける。
（ｂ）に示す通り、フォーク部材２６で車軸２７の両端を支えるため、第１車輪１５が振れる虞れはない。
【００１４】
（ａ）に戻って、台車フレーム１３にガイド２８，２８を設け、そこへフォーム部材２６を嵌合すれば、実線で示す第１車輪１５を想像線で示す第１車輪１５まで距離ａだけ往復させることができる。想像線位置が走行位置、実線位置が待機位置である。
図１の第２車輪１７に係る構成は同様であるから、説明は省略する。
【００１５】
図３は本発明に係る金型交換台車の平面図であり、昇降台２０の台板２１には、複数のロール２９・・・を並べたローラテーブルとし、金型を移動できるようにする。なお、ロール２９・・・はモータで駆動することは差支えないが、フリー回転ロールであってもよい。
【００１６】
図４は本発明に係る金型交換台車の車輪配置図であり、今まで説明しなかったが本発明では共用レール３１・・・とこれに直交する分岐レール３２・・・とを布設し、共用レール３１，３１に第１車輪１５・・・を載せ、分岐レール３２，３２に第２車輪１７・・・を載せる。更に、左右一対の第１車輪１５，１５に第１駆動軸３３を渡し、この第１駆動軸３３をチェーン３４、スプロケット３５，３６及び第１モータ３７で正逆転させ、また、一対の第２車輪１７，１７に第２駆動軸３８を渡し、この第２駆動軸３８をチェーン３９、スプロケット４１，４２及び第２モータ４３で正逆転させることで、金型交換台車１０を走行可能にする。
【００１７】
なお、実施例では第１車輪１５の数は４個としたが、三角形の頂点に配置することで３個にすることもできる。又、５個以上であってもよい。従って、第１車輪１５の数は少なくとも３個あればよい。第２車輪１７の数も同様に少なくとも３個あればよい。
【００１８】
図５（ａ）〜（ｃ）は本発明に係る第１・第２車輪の作用説明図である。
（ａ）は金型交換台車の共用レール走行形態を示し、この形態では第１車輪１５，１５が共用レール３１，３１に接し、第２車輪１７，１７が分岐レール３２，３２並びに共用レール３１，３１から浮き上がり、金型交換台車は図左右へ走行可能になる。
（ｂ）では形態を切換えるために、第２車輪１７，１７を下げて分岐レール３２，３２に接触させる。この図では第１車輪１５，１５、第２車輪１７，１７の全てが共用レール３１，３１又は分岐レール３２，３２に載っている。この後に、第１車輪１５，１５のみを上げる。
（ｃ）は金型交換台車の共用レール走行形態を示し、この形態では第１車輪１５，１５は共用レール３１，３１から離れ、第２車輪１７，１７が分岐レール３２，３２に接しており、金型交換台車は図面表裏方向に移動可能となる。
【００１９】
図６は本発明に係る射出成形機レイアウト（第１実施例）図であり、共用レール３１・・・の脇に且つ一方の側に２基の射出成形機４５，４５を直列に配置し、及び他方の側に２基の射出成形機４５，４５を直列に配置し、共用レール３１から直角に射出成形機４５・・・に向って分岐レール３２・・・を各々延ばし、共用レール３１・・・に射出成形機用金型交換台車１０を走らせるようにした射出成形機レイアウトを示す。
このレイアウトでは、従来使用していた成形型交換テーブルの代わりに分岐レール３２・・・を布設した。分岐レール３２・・・はコンパクトであるため、設備が全体的に簡単になり設備コストの低減が図れる。
【００２０】
図７は本発明に係る射出成形機レイアウト（第２実施例）図であり、共用レール３１…に沿って大型（Ｌサイズ）の射出成形機４５Ｌと小型（Ｓサイズ）の射出成形機４５Ｓと中型（Ｍサイズ）の射出成形機４５Ｍを直列に並べ、共用レール３１・・・に臨む射出成形機４５Ｌ，４５Ｓ，４５Ｍの面をレール側面４６Ｌ，４６Ｓ，４６Ｍ、共用レール３１・・・から遠い方の面を作業側面４７Ｌ，４７Ｓ，４７Ｍと呼び、射出成形機４５Ｌ，４５Ｓ，４５Ｍの装置長さを機長Ｌ１，Ｌ２，Ｌ３、これに直交する装置幅を機幅Ｗ１，Ｗ２，Ｗ３と呼び、複数の射出成形機４５Ｌ，４５Ｓ，４５Ｍの機幅Ｗ１，Ｗ２，Ｗ３が互いに異なるとき射出成形機の作業側面４７Ｌ，４７Ｓ，４７Ｍを直線Ｌ５に沿わせることで揃えた。これは分岐レール３２・・・の長さを変えることで達成できたものである。
この結果、作業動線が直線になり、作業者が射出成形機４５Ｌ，４５Ｓ，４５Ｍに接触する心配が減り、作業者の負担を大幅に低減することができる。
【００２１】
次に、本発明に係る更なる改良技術を説明する。
図８は図４の８−８矢視図であり、第１車輪１５，１５が共用レール３１，３１に載っていることを示す。
図９は本発明に係るレールの要部レイアウト図であり、共用レール３１・・・に分岐レール３２・・・を交差させる関係上、交差部には共用レール３１の幅より大きな縦横寸法の切欠き部４９・・・を設けなければならない。台車の横移動を防ぐために左右車輪の一方に両鍔付き車輪（図８の右側の車輪参照）を使用する又は左右車輪の両方に片鍔付き車輪を使用する必要があり、これらの鍔を通過させるために隙間ｔ，ｔが必要になるからである。
前記切欠き部４９は必要であり、金型交換台車が切欠き部４９で若干上下に移動することは止むを得ないことであるが、切欠き部４９に起因する上下動は少ない方が良いことは確かである。
【００２２】
図１０は本発明に係るレール交差部のためのレール継ぎ機構の斜視図であり、このレール継ぎ機構５０は、交差部の地中に設けるものであり、ベース５１と、このベース５１に鉛直軸回りに回転可能に且つ縦向き取付けたシリンダ５２と、このシリンダ５２のピストンロッド５３に取付けたレール片５４と、シリンダ５２を９０゜旋回させる旋回用シリンダ５５とからなる。
ここで、重要なことは、レール片５４は１ｍｍ程度の僅かな隙間ｔ０，ｔ０を見込んだだけで切欠き部４９の大きさとほぼ同じ長さにする。しかし、この様にレール片５４を一杯の長さにすると、その位置では旋回できないので、次の要領で旋回させる。
【００２３】
共用レール３１，３１に倣っている実線で示すレール片５４を９０゜旋回させるには、シリンダ５２を作動してレール片５４を想像線の位置まで下げる。次に旋回シリンダ５５を作動してシリンダ５２ごとレール片５４を９０゜を回す。続いて、シリンダ５２を作動してレール片５４を上げ、分岐レール３２，３２に倣わせる。
レール片５４の両端の隙間ｔ０，ｔ０は微小であるから、金型交換台車が交差点で上下動する虞れはなく、載置した金型に無用な振動を与える虞れも無い。
【００２４】
尚、第１・第２昇降手段やシリンダは、エアシリンダ、油圧シリンダ又は電動シリンダが好適であるが、いわゆるアクチエータであればその種類、形式は問わない。
【００２５】
【発明の効果】
本発明は上記構成により次の効果を発揮する。
請求項１の金型交換台車は、いわゆるｘ−ｙ走行可能台車であり、射出成形機に平行に及び直角に走行させることができる。射出成形機に直角に走行させることができるので、従来付属していた成形型交換テーブルを省くことができる。加えて、台車フレームに昇降台を備えたので、金型の高さを自在に調整することができ、大小各種サイズの金型を１基の金型交換台車で賄うことができる。
【００２６】
請求項２は、共用レールに沿って少なくとも２基の射出成形機を直列に配置し、共用レールから直角に射出成形機に向って分岐レールを各々延ばし、共用レール並びに分岐レールに請求項１記載の射出成形機用金型交換台車を走らせるように射出成形機をレイアウトしたことを特徴とし、請求項１記載の金型交換台車は射出成形機に直角に走行させることができるので、従来付属していた成形型交換テーブルを省くことができる。加えて、台車フレームに昇降台を備えたので、金型の高さを自在に調整することができ、大小各種サイズの金型を１基の金型交換台車で賄うことができる。
【００２７】
請求項３は、複数の射出成形機は分岐レールの長さを異ならせることで、複数の射出成形機の作業側面を揃えるようにした。この結果、作業動線が直線になり、作業者が射出成形機に接触する心配が減り、作業者の負担を大幅に低減することができる。
【図面の簡単な説明】
【図１】本発明に係る射出成形機用金型交換台車の側面図
【図２】本発明で採用する昇降式車輪の正面図及び側面図
【図３】本発明に係る金型交換台車の平面図
【図４】本発明に係る金型交換台車の車輪配置図
【図５】本発明に係る第１・第２車輪の作用説明図
【図６】本発明に係る射出成形機レイアウト（第１実施例）図
【図７】本発明に係る射出成形機レイアウト（第２実施例）図
【図８】図４の８−８矢視図
【図９】本発明に係るレールの要部レイアウト図
【図１０】本発明に係るレール交差部のためのレール継ぎ機構の斜視図
【符号の説明】
１０…射出成形機用金型交換台車（金型交換台車）、１１，１２…金型、１３…台車フレーム、１４…第１昇降手段、１５…第１車輪、１６…第２昇降手段、１７…第２車輪、１９…制御部、２０…昇降台、２２…Ｘリンク、２３…昇降シリンダ、３１…共用レール、３２…分岐レール、４５，４５Ｌ，４５Ｍ，４５Ｓ…射出成形機、４６Ｌ，４６Ｍ，４６Ｓ…レール側の面、４７Ｌ，４７Ｍ，４７Ｓ…作業側の面。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in a mold exchange cart for an injection molding machine and an improvement in the layout of an injection molding machine using the mold exchange cart.
[0002]
[Prior art]
For example, in FIG. 10 of Japanese Patent Publication No. 4-6531 entitled "Molding die changing apparatus for a group of synthetic resin injection molding machines", a rail-shaped guide 45 (the reference numerals used in the gazette are used. The same applies hereinafter). , The movable carriage 27 is mounted on the guide 45 so as to be able to travel freely, a small injection molding machine is arranged beside the guide 45 and on the upper left side in the figure, and a medium-sized injection molding machine is arranged on the lower left side in the figure. A mold storage station 44 is arranged on the upper right side, a large injection molding machine is arranged on the lower right side of the figure, and the mold exchanging tables 19, 19, 19 are extended from small, medium and large injection molding machines, respectively. The layout of the molding machine is shown.
[0003]
For example, the mold stored in the mold storage station 44 is placed on the movable trolley 27, and the movable trolley 27 is moved to the medium-sized injection molding machine, where the mold is transferred from the movable trolley 27 to the mold exchange table 19. Then, the mold is moved in the manner of transferring the mold from the mold exchange table 19 to a medium-sized injection molding machine. In this manner, the mold can be exchanged by reciprocating the mold between the small / medium / large injection molding machine and the mold storage station 44.
[0004]
[Problems to be solved by the invention]
As is apparent from FIG. 10 of the above publication, each of small, medium and large injection molding machines must be provided with a mold exchange table 19, 19, 19. As a result, the cost of the mold exchange tables 19, 19, 19 increases.
Further, as is apparent from FIG. 10, since the surface on the guide 45 side of the small-sized injection molding machine and the surface on the guide 45 side of the medium-sized injection molding machine are aligned, the surface farther from the guide 45 is Become irregular. The surface far from the guide 45 faces the inspection passage of the worker, and if the surface is not aligned as described above, the flow line of the worker will meander, and the worker will easily come into contact with the injection molding machine, and the burden on the worker will increase.
That is, in the layout of the conventional injection molding machine, a mold exchange table is always provided, and the surface of the injection molding machine is not uniform on the side of the inspection passage. Therefore, these improvements are required.
[0005]
[Means for Solving the Problems]
In order to meet the above-mentioned demands, a first aspect of the present invention is a truck frame provided with a lifting platform capable of supporting a mold and adjusting the height of the mold, and at least three trucks mounted to the truck frame via first lifting means. First wheels, at least three second wheels attached to the bogie frame via second elevating means and orthogonally arranged to the first wheels, and only one of the first wheel and the second wheel during running of the bogie. A control unit for controlling the first and second elevating means to make contact with the rails constitutes a mold exchanging cart for an injection molding machine.
[0006]
This mold exchanging cart is a so-called xy traveling cart, and can be run parallel to and perpendicular to the injection molding machine. Since it can be run at right angles to the injection molding machine, the mold exchange table conventionally attached can be omitted. In addition, since the carriage frame is provided with the elevating platform, the height of the mold can be adjusted freely, so that molds of various sizes, large and small, can be covered by one mold exchange cart.
[0007]
According to a second aspect of the present invention, at least two injection molding machines are arranged in series along the common rail, and branch rails are respectively extended from the common rail toward the injection molding machine at right angles. The injection molding machine is laid out so that the mold exchanging trolley for the injection molding machine is run.
[0008]
Since it can be run at right angles to the injection molding machine, the mold exchange table conventionally attached can be omitted. In addition, since the carriage frame is provided with the elevating platform, the height of the mold can be adjusted freely, so that molds of various sizes, large and small, can be covered by one mold exchange cart.
[0009]
The surface of the injection molding machine facing the common rail is referred to as a rail side surface, the surface farther from the common rail is referred to as a working side surface, and the device length of the injection molding machine is the machine length, and the device width orthogonal to the machine width is the machine width. In other words, when the width of a plurality of injection molding machines is different, the injection molding machines are laid out by aligning the working sides of the plurality of injection molding machines by making the lengths of the branch rails different. .
[0010]
By making the lengths of the branch rails of the injection molding machines different, the working sides of the injection molding machines are aligned. As a result, the work flow line becomes straight, the concern that the worker comes into contact with the injection molding machine is reduced, and the burden on the worker can be greatly reduced.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals.
FIG. 1 is a side view of a mold exchanging cart for an injection molding machine according to the present invention. A mold exchanging cart for an injection molding machine (hereinafter abbreviated as “mold exchanging cart”) 10 is a new and old mold 11. , 12 and a trolley frame 13 provided with an elevating platform 20 capable of adjusting the height of the dies 11, 12, and at least three first pallets mounted on the trolley frame 13 via first lifting means 14. (1 indicates a plurality of wheels; the same applies hereinafter), and at least three wheels attached to the bogie frame 13 via the second lifting / lowering means 16 and a second wheel orthogonally disposed to the first wheel 15. A control unit 19 that controls the first and second elevating means 15 and 17 so that only one of the wheels 17... And one of the first wheels 15... And the second wheels 17. And consisting of
[0012]
As a specific example, the lifting platform 20 is composed of a platform 21, an X-link 22, and a lifting cylinder 23, and is a pantograph link type lifting mechanism that raises or lowers the platform 21 from the bogie frame 13 by the action of the lifting cylinder 23. is there. However, the lift 20 may be one that directly raises and lowers the base plate 21 with a cylinder, or the X link 22 may be changed to a parallel link, so that the lift mechanism of the lift 20 is arbitrarily selected. You may.
[0013]
2 (a) and 2 (b) are a front view and a side view of a lifting wheel used in the present invention.
As shown in (a), the first elevating means 14 is fixed to the bogie frame 13, the fork member 26 is fixed to the actuator shaft 25 extending downward from the first elevating means 14, and the axle 27 is rotated by the fork member 26. The first wheel 15 is attached to the first elevating means 14 by being attached as possible.
As shown in (b), since both ends of the axle 27 are supported by the fork member 26, there is no fear that the first wheel 15 swings.
[0014]
Returning to (a), when the guides 28 and 28 are provided on the bogie frame 13 and the foam member 26 is fitted thereto, the first wheel 15 shown by a solid line reciprocates by a distance a to the first wheel 15 shown by an imaginary line. Can be done. The imaginary line position is the running position, and the solid line position is the standby position.
Since the configuration of the second wheel 17 in FIG. 1 is the same, the description is omitted.
[0015]
FIG. 3 is a plan view of the mold exchanging cart according to the present invention. A roller table in which a plurality of rolls 29 are arranged on a base plate 21 of an elevating platform 20 so that the mold can be moved. The rollers 29 can be driven by a motor, but may be free-rotating rolls.
[0016]
FIG. 4 is a diagram showing the wheel arrangement of the mold exchanging truck according to the present invention. Although not described so far, the present invention lays out common rails 31... And branch rails 32. The first wheels 15 are mounted on the shared rails 31, and the second wheels 17 are mounted on the branch rails 32. Further, the first drive shaft 33 is passed to the pair of left and right first wheels 15, 15, and the first drive shaft 33 is rotated forward and reverse by the chain 34, the sprockets 35, 36 and the first motor 37. The second drive shaft 38 is passed to the wheels 17, 17, and the second drive shaft 38 is rotated forward and reverse by the chain 39, the sprockets 41, 42, and the second motor 43, so that the mold exchanging cart 10 can travel.
[0017]
Although the number of the first wheels 15 is four in the embodiment, three wheels can be provided by arranging the first wheels 15 at the vertices of a triangle. Further, the number may be five or more. Therefore, the number of the first wheels 15 may be at least three. Similarly, the number of the second wheels 17 may be at least three.
[0018]
FIGS. 5A to 5C are diagrams for explaining the operation of the first and second wheels according to the present invention.
(A) shows a common rail traveling mode of the mold exchanging cart. In this mode, the first wheels 15, 15 are in contact with the common rails 31, 31, and the second wheels 17, 17 are connected to the branch rails 32, 32 and the common rail 31. , 31 and the mold exchanging trolley can travel left and right in the figure.
In (b), in order to switch the form, the second wheels 17, 17 are lowered to contact the branch rails 32, 32. In this figure, all of the first wheels 15, 15 and the second wheels 17, 17 are mounted on the shared rails 31, 31 or the branch rails 32, 32. Thereafter, only the first wheels 15, 15 are raised.
(C) shows a common rail traveling mode of the mold exchanging cart. In this mode, the first wheels 15, 15 are separated from the common rails 31, 31, and the second wheels 17, 17 are in contact with the branch rails 32, 32. Then, the mold exchanging cart can be moved in the front and back directions of the drawing.
[0019]
FIG. 6 is a diagram of an injection molding machine layout (first embodiment) according to the present invention, in which two injection molding machines 45, 45 are arranged in series beside the common rail 31. And two injection molding machines 45 are arranged in series on the other side, and the branch rails 32 are respectively extended from the common rail 31 at right angles to the injection molding machines 45. Shows the layout of the injection molding machine in which the mold exchanging cart 10 for the injection molding machine is run.
In this layout, branch rails 32... Are laid in place of the conventionally used mold exchange table. Since the branch rails 32 are compact, the equipment can be simplified as a whole and the equipment cost can be reduced.
[0020]
FIG. 7 is a layout (second embodiment) of an injection molding machine according to the present invention, and shows a large (L size) injection molding machine 45L and a small (S size) injection molding machine 45S along the common rails 31. Medium-sized (M size) injection molding machines 45M are arranged in series, and the surfaces of the injection molding machines 45L, 45S, 45M facing the common rails 31 are far from the rail side surfaces 46L, 46S, 46M, the common rails 31 ... Are called working side surfaces 47L, 47S, and 47M, the machine lengths of the injection molding machines 45L, 45S, and 45M are machine lengths L1, L2, and L3, and machine widths orthogonal thereto are machine widths W1, W2, and W3. When the machine widths W1, W2, and W3 of the plurality of injection molding machines 45L, 45S, and 45M are different from each other, the working side surfaces 47L, 47S, and 47M of the injection molding machines are aligned along a straight line L5. This can be achieved by changing the length of the branch rails 32.
As a result, the work flow line becomes straight, and the worker is less likely to come into contact with the injection molding machines 45L, 45S, and 45M, and the burden on the worker can be greatly reduced.
[0021]
Next, a further improved technique according to the present invention will be described.
FIG. 8 is a view taken in the direction of the arrow 8-8 in FIG. 4, and shows that the first wheels 15, 15 are mounted on the shared rails 31, 31.
FIG. 9 is a layout diagram of a main part of the rail according to the present invention. Since the common rail 31... Intersects the branch rails 32. The notches 49 must be provided. In order to prevent lateral movement of the bogie, it is necessary to use both flanged wheels (see the right wheel in FIG. 8) for one of the left and right wheels, or to use single flanged wheels for both the left and right wheels. This is because the gaps t and t are required to perform the operation.
The notch 49 is necessary, and it is unavoidable that the mold exchanging cart slightly moves up and down in the notch 49. However, it is better that the vertical movement caused by the notch 49 is small. That is for sure.
[0022]
FIG. 10 is a perspective view of a rail splicing mechanism for a rail intersection according to the present invention. The rail splicing mechanism 50 is provided underground at the intersection, and includes a base 51 and a vertical shaft The cylinder 52 includes a cylinder 52 rotatably and vertically mounted, a rail piece 54 mounted on a piston rod 53 of the cylinder 52, and a turning cylinder 55 for turning the cylinder 52 by 90 °.
What is important here is that the rail piece 54 has a length substantially the same as the size of the cutout portion 49 only by allowing for a slight gap t0, t0 of about 1 mm. However, if the rail piece 54 is made full length in this way, it cannot be turned at that position, so it is turned in the following manner.
[0023]
To rotate the rail piece 54 indicated by a solid line following the common rails 31 and 90 by 90 °, the cylinder 52 is operated to lower the rail piece 54 to the position of the imaginary line. Next, the turning cylinder 55 is operated to turn the rail piece 54 by 90 ° together with the cylinder 52. Subsequently, the cylinder 52 is operated to raise the rail piece 54 so as to follow the branch rails 32.
Since the gaps t0, t0 at both ends of the rail piece 54 are very small, there is no danger that the mold exchanging truck will move up and down at the intersection, and there is no danger of giving unnecessary vibration to the placed mold.
[0024]
The first and second lifting / lowering means and cylinders are preferably air cylinders, hydraulic cylinders or electric cylinders, but may be of any type and type as long as they are so-called actuators.
[0025]
【The invention's effect】
The present invention has the following effects by the above configuration.
The mold exchanging cart according to the first aspect is a so-called xy traveling cart, which can be run in parallel and at a right angle to the injection molding machine. Since it can be run at right angles to the injection molding machine, the mold exchange table conventionally attached can be omitted. In addition, since the carriage frame is provided with the elevating platform, the height of the mold can be adjusted freely, so that molds of various sizes, large and small, can be covered by one mold exchange cart.
[0026]
According to a second aspect of the present invention, at least two injection molding machines are arranged in series along the common rail, and branch rails are respectively extended from the common rail toward the injection molding machine at right angles. The injection molding machine is laid out so as to run the mold exchanging cart for the injection molding machine. The mold exchanging cart according to claim 1 can be run at a right angle to the injection molding machine. It is possible to omit the mold exchange table that has been used. In addition, since the carriage frame is provided with the elevating platform, the height of the mold can be adjusted freely, so that molds of various sizes, large and small, can be covered by one mold exchange cart.
[0027]
According to a third aspect of the present invention, the working side surfaces of the plurality of injection molding machines are made uniform by changing the lengths of the branch rails. As a result, the work flow line becomes straight, and the concern that the worker comes into contact with the injection molding machine is reduced, and the burden on the worker can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is a side view of a mold changing cart for an injection molding machine according to the present invention. FIG. 2 is a front view and a side view of a lifting wheel used in the present invention. FIG. 3 is a diagram showing a mold changing cart according to the present invention. FIG. 4 is a plan view of a wheel arrangement of a mold exchanging truck according to the present invention. FIG. 5 is an explanatory diagram of an operation of first and second wheels according to the present invention. FIG. 6 is a layout of an injection molding machine according to the present invention. 1 embodiment) FIG. 7 FIG. 7 is a layout of an injection molding machine according to the present invention (second embodiment) FIG. 8 is a view taken along the line 8-8 in FIG. 4 FIG. 9 is a layout of a main part of a rail according to the present invention FIG. 10 is a perspective view of a rail joining mechanism for a rail intersection according to the present invention.
DESCRIPTION OF SYMBOLS 10 ... Die exchange trolley for injection molding machines (die exchange trolley), 11, 12 ... Die, 13 ... Dolly frame, 14 ... First lifting / lowering means, 15 ... First wheel, 16 ... Second lifting / lowering means, 17 ... Second wheel, 19 ... Control unit, 20 ... Elevating table, 22 ... X link, 23 ... Elevating cylinder, 31 ... Common rail, 32 ... Branch rail, 45, 45L, 45M, 45S ... Injection molding machine, 46L, 46M , 46S: Rail-side surface, 47L, 47M, 47S: Work-side surface.
