JP4092664B2

JP4092664B2 - Safety device for vertical injection molding machine

Info

Publication number: JP4092664B2
Application number: JP2006280240A
Authority: JP
Inventors: 亘佐藤; 哲郎山田
Original assignee: Niigata Machine Techno Co Ltd
Current assignee: Niigata Machine Techno Co Ltd
Priority date: 2006-10-13
Filing date: 2006-10-13
Publication date: 2008-05-28
Anticipated expiration: 2026-10-13
Also published as: JP2008094027A

Description

本発明は、竪型射出成形機の安全装置に関し、特に射出装置の落下を防止するための竪型射出成形機の安全装置に関する。 The present invention relates to a safety device for a vertical injection molding machine, and more particularly to a safety device for a vertical injection molding machine for preventing the injection device from dropping.

従来、複雑な形状の成形品を大量に能率よく生産できることから射出成形法が用いられ、この射出成形には、省スペースで且つ自動化を容易に行なえるなどの利点から一対の金型の開閉や型締を上下方向に行う竪型射出成形機が多用されている。一般に、この種の竪型射出成形機は、型締機構で固定盤に対し可動盤を上下動させて金型の開閉、型締を行なう型締装置と、フィード機構により可動盤に対して上下動可能に設けられた射出装置とを備えて構成されている。また、射出装置は、立設されたガイドロッドにそれぞれ上下動可能に支持された加熱筒支持部材及びスクリュー支持部材を備えている。そして、加熱筒支持部材に、供給した樹脂原料（成形材料）を加熱しつつ溶融させ、先端側に設けられた射出ノズル（先端部）から金型のキャビティー内に溶融樹脂を射出させる加熱筒が取り付けられ、スクリュー支持部材に、加熱筒内に挿入して軸線回りに回転可能とされたスクリューが取り付けられている。 Conventionally, an injection molding method has been used because it is possible to efficiently produce a large number of molded products with complicated shapes. This injection molding can be performed by opening and closing a pair of molds from the advantages of space saving and easy automation. A vertical injection molding machine that performs clamping in the vertical direction is frequently used. Generally, this type of vertical injection molding machine has a mold clamping device that opens and closes and molds the mold by moving the movable plate up and down with respect to the fixed plate by the mold clamping mechanism, and a vertical movement with respect to the movable plate by the feed mechanism. And an injection device that is movably provided. Further, the injection device includes a heating cylinder support member and a screw support member that are supported by a standing guide rod so as to be vertically movable. And the heating cylinder which makes the heating cylinder support member melt the supplied resin raw material (molding material) while heating, and injects the molten resin into the mold cavity from the injection nozzle (tip portion) provided on the front end side. Is attached to the screw support member, and the screw inserted into the heating cylinder and rotatable about the axis is attached.

一方で、この種の竪型射出成形機には、例えば、特許文献１に開示されるような、射出装置の落下を防止するための安全装置を具備したものがある。この安全装置は、射出装置を上下動させるフィード機構の駆動源であるモータと、加熱筒保持プレート（加熱筒支持部材）を支持する複数のねじ軸とに、複数のベルトを巻き回して構成されている。このように複数のベルトを備えて構成した竪型射出成形機の安全装置では、射出装置全体の重量がフィード機構に付加荷重として作用するが、モータに内蔵された不動作時のブレーキで射出装置の落下を防止するとともに、万一一つのベルトが切断した場合においても、他のベルトによってねじ軸の回転が規制されるため、射出装置が急激に落下することを防止できる。
特開２００２−１７２６７１号公報 On the other hand, this type of vertical injection molding machine includes a safety device for preventing the injection device from dropping, as disclosed in Patent Document 1, for example. This safety device is configured by winding a plurality of belts around a motor that is a drive source of a feed mechanism that moves the injection device up and down and a plurality of screw shafts that support a heating cylinder holding plate (heating cylinder support member). ing. In the safety device for a vertical injection molding machine configured with a plurality of belts as described above, the weight of the entire injection device acts as an additional load on the feed mechanism, but the injection device is operated by a brake built in the motor when not operating. In addition, when one belt is cut, the rotation of the screw shaft is restricted by another belt, so that the injection device can be prevented from dropping suddenly.
JP 2002-172671 A

しかしながら、上記の安全装置では、一つのベルトが切断した際に、モータの不動作時のブレーキや他のベルトに大重量の射出装置を支持するための大きな力が急激に負荷されるため、ブレーキの破損や他のベルトの切断が連鎖して生じるおそれがある。特に、成形材料（樹脂）を交換するために加熱筒や射出ノズル内の古い樹脂を排出（パージ）させたり、加熱筒の射出ノズルやヒータ、熱電対の交換作業などのメンテナンスを行う際に、可動盤と加熱筒（あるいはその先端部にある射出ノズル）の間に作業者が身体の一部を入れることが多々あり、上記の安全装置では、このようなパージ作業やメンテナンス作業時に、確実に射出装置の落下を防止できないおそれがある。このため、作業者が身体の一部を入れた状態で射出装置が落下して重大事故が発生することを確実に防止できる安全装置が強く求められていた。 However, in the above safety device, when one belt is cut, the brake when the motor is not operating and a large force for supporting the heavy injection device on the other belt are suddenly loaded. There is a possibility that damage to the belt or cutting of other belts may occur in a chain. In particular, when exchanging the old resin in the heating cylinder or injection nozzle to replace the molding material (resin), or when performing maintenance such as replacing the injection nozzle, heater, or thermocouple of the heating cylinder, There are many cases where an operator puts a part of the body between the movable platen and the heating cylinder (or the injection nozzle at the tip thereof). There is a risk that the injection device cannot be prevented from falling. For this reason, there has been a strong demand for a safety device that can reliably prevent a serious accident from occurring due to the injection device falling while the worker puts a part of the body.

本発明は、上記事情を鑑み、パージ作業やメンテナンス作業などを行なう際に、確実に射出装置の落下を防止して、作業者の安全性を確保できる竪型射出成形機の安全装置を提供することを目的とする。 In view of the above circumstances, the present invention provides a safety device for a vertical injection molding machine that can reliably prevent the injection device from falling when performing a purge operation, a maintenance operation, or the like, thereby ensuring the safety of the operator. For the purpose.

上記の目的を達するために、この発明は以下の手段を提供している。 In order to achieve the above object, the present invention provides the following means.

本発明の竪型射出成形機の安全装置は、型締機構で固定盤に対し可動盤を上下動させて金型の開閉、型締を行なう型締装置と、フィード機構により前記可動盤に対して上下動可能に設けられた射出装置とを備える竪型射出成形機の安全装置であって、前記射出装置と前記可動盤のどちらか一方に固定して支持された第一係止部材と、該第一係止部材を支持していない前記射出装置または前記可動盤に前記第一係止部材と係合可能に支持された第二係止部材とを備え、前記射出装置には、型締した金型のキャビティー内に成形材料を供給する加熱筒が設けられるとともに、該加熱筒の先端部を作業者から遮断するための開閉式のパージカバーが設けられており、前記パージカバーと前記第二係止部材との間に連動部材が設けられ、前記パージカバーを開放すると前記連動部材を介して前記第二係止部材が移動し、前記第一係止部材と前記第二係止部材が自動的に係合することによって、前記射出装置の落下を防止することを特徴とする。 The safety device of the vertical injection molding machine of the present invention includes a mold clamping device that opens / closes and molds a mold by moving a movable plate up and down with respect to a fixed plate by a mold clamping mechanism, and a movable mechanism for the movable plate by a feed mechanism. A vertical injection molding machine safety device provided with an injection device provided to be movable up and down, a first locking member fixed and supported on either the injection device or the movable platen, and a second locking member which is the injection apparatus or the support to be engaged with the first locking member to the movable platen is not supporting the said first locking member, in the injection device, a mold clamping A heating cylinder for supplying a molding material is provided in the cavity of the mold, and an open / close-type purge cover for shutting off the tip of the heating cylinder from an operator is provided. An interlocking member is provided between the second locking member and the purge When the opening is released, the second locking member moves via the interlocking member, and the first locking member and the second locking member automatically engage to prevent the injection device from falling. characterized in that it.

この発明においては、射出装置を上下動させるためのフィード機構のモータ（不動作時のブレーキ）が破損するような場合においても、第一係止部材と第二係止部材が機械的に係合されて、射出装置の移動を規制することができる。このとき、パージカバーと第二係止部材が連動部材で繋げられているため、パージ作業やメンテナンス作業を行なうために作業者がパージカバーを開くとともに、射出装置が落下しないように自動的に第一係止部材と第二係止部材を係合させることができる。また、パージ作業やメンテナンス作業を終えた作業者がパージカバーを閉じるとともに、射出装置を上下動可能な状態に戻すことも可能になる。これにより、パージ作業やメンテナンス作業を行なう際に、作業者による特別な操作を要することなく、確実に射出装置の落下を防止でき、射出装置が落下して重大事故が発生することを確実に防止できる。また、作業者による特別な操作を要することなく、成形作業を行なう状態に戻すことができる。 In the present invention, the first locking member and the second locking member are mechanically engaged even when the motor of the feed mechanism for moving the injection device up and down (the brake when not operating) is damaged. Thus, the movement of the injection device can be restricted. At this time, since the purge cover and the second locking member are connected by the interlocking member, the operator opens the purge cover in order to perform the purging operation and the maintenance operation, and the injection device automatically prevents the injection device from dropping. One locking member and the second locking member can be engaged. In addition, the worker who has completed the purge operation or the maintenance operation can close the purge cover and return the injection device to a state in which the injection device can be moved up and down. As a result, when performing purge work and maintenance work, it is possible to reliably prevent the injection device from falling without requiring any special operation by the operator, and to prevent a serious accident from occurring due to the injection device falling. it can. Moreover, it can return to the state which performs a shaping | molding operation | work, without requiring special operation by an operator.

また、本発明の竪型射出成形機の安全装置は、型締機構で固定盤に対し可動盤を上下動させて金型の開閉、型締を行なう型締装置と、フィード機構により前記可動盤に対して上下動可能に設けられた射出装置とを備える竪型射出成形機の安全装置であって、前記射出装置と前記可動盤のどちらか一方に固定して支持された第一係止部材と、該第一係止部材を支持していない前記射出装置または前記可動盤に前記第一係止部材と係合可能に支持された第二係止部材とを備え、前記射出装置には、型締した金型のキャビティー内に成形材料を供給する加熱筒が設けられるとともに、該加熱筒の先端部を作業者から遮断するための開閉式のパージカバーが設けられており、前記パージカバーの開閉を検知する検知手段が設けられ、該検知手段が前記パージカバーの開放動作を検知するとともに、前記第二係止部材が移動し、前記第一係止部材と前記第二係止部材が自動的に係合することによって、前記射出装置の落下を防止することを特徴とする。 Further, the safety device of the vertical injection molding machine of the present invention includes a mold clamping device that opens and closes a mold by moving a movable plate up and down with respect to a fixed plate by a mold clamping mechanism, and the movable plate by a feed mechanism. And a first locking member fixedly supported by either the injection device or the movable platen, which is a safety device for a vertical injection molding machine provided with an injection device provided so as to be movable up and down And the injection device that does not support the first locking member or the second locking member that is supported on the movable plate so as to be engageable with the first locking member, the injection device includes: A heating cylinder for supplying a molding material is provided in the cavity of the clamped mold, and an open / close-type purge cover is provided for blocking the tip of the heating cylinder from an operator. Detection means for detecting the opening and closing of the Detecting the opening operation of the cover, and the second locking member moves, and the first locking member and the second locking member automatically engage to prevent the injection device from dropping. It is characterized by that .

この発明においては、射出装置を上下動させるためのフィード機構のモータ（不動作時のブレーキ）が破損するような場合においても、第一係止部材と第二係止部材が機械的に係合されて、射出装置の移動を規制することができる。このとき、パージカバーの開閉を検知する検知手段が設けられているため、パージ作業やメンテナンス作業を行なうために作業者がパージカバーを開くとともに、射出装置が落下しないように自動的に第一係止部材と第二係止部材を係合させることができる。また、パージ作業やメンテナンス作業を終えた作業者がパージカバーを閉じるとともに、射出装置を上下動可能な状態に戻すことも可能になる。これにより、パージ作業やメンテナンス作業を行なう際に、作業者による特別な操作を要することなく、確実に射出装置の落下を防止でき、射出装置が落下して重大事故が発生することを確実に防止できる。また、作業者による特別な操作を要することなく、成形作業を行なう状態に戻すことができる。 In the present invention , the first locking member and the second locking member are mechanically engaged even when the motor of the feed mechanism for moving the injection device up and down (the brake when not operating) is damaged. Thus, the movement of the injection device can be restricted. At this time, since the detecting means for detecting the opening and closing of the purge cover is provided, the operator automatically opens the first cover so that the purge cover and the maintenance work are opened and the injection device is not dropped. The stop member and the second locking member can be engaged. In addition, the worker who has completed the purge operation or the maintenance operation can close the purge cover and return the injection device to a state in which the injection device can be moved up and down. As a result, when performing purge work and maintenance work, it is possible to reliably prevent the injection device from falling without requiring any special operation by the operator, and to prevent a serious accident from occurring due to the injection device falling. it can. Moreover, it can return to the state which performs a shaping | molding operation | work, without requiring special operation by an operator.

本発明の竪型射出成形機の安全装置によれば、パージ作業やメンテナンス作業を行なう際に、確実に第一係止部材と第二係止部材が係合して射出装置の落下が防止できるため、フィード機構のモータのブレーキが破損した場合においても、作業者の安全性を確保することができ、重大事故が発生することを確実に防止できる。 According to the safety device for a vertical injection molding machine of the present invention, when the purge operation or the maintenance operation is performed, the first locking member and the second locking member can be reliably engaged to prevent the injection device from falling. Therefore, even when the brake of the motor of the feed mechanism is broken, the safety of the worker can be ensured and the occurrence of a serious accident can be surely prevented.

以下、図１から図６を参照し、本発明の第１実施形態に係る竪型射出成形機の安全装置について説明する。本実施形態は、パージした樹脂の排除やノズルのメンテナンスを作業者が行う際に、射出装置が落下することを確実に防止して、作業者の安全性を確保するための竪型射出成形機の安全装置に関するものである。 Hereinafter, a safety device for a vertical injection molding machine according to a first embodiment of the present invention will be described with reference to FIGS. This embodiment is a vertical injection molding machine that ensures the safety of the operator by reliably preventing the injection device from dropping when the operator performs purged resin removal and nozzle maintenance. This relates to the safety device.

本実施形態の竪型射出成形機Ａは、図１に示すように、一対の金型（固定側金型Ｋ１と可動側金型Ｋ２）の開閉、型締めを行なうための型締装置１と、型締めした一対の金型のキャビティー内に例えば溶融した樹脂などの成形材料を射出する射出装置２とを備えて構成されている。また、本実施形態の竪型射出成形機Ａには、射出装置２の落下を防止するための安全装置Ｂが具備されている。 As shown in FIG. 1, the vertical injection molding machine A of the present embodiment includes a mold clamping device 1 for opening and closing and clamping a pair of molds (a fixed mold K1 and a movable mold K2). And an injection device 2 for injecting a molding material such as molten resin into the cavities of a pair of molds clamped. Further, the vertical injection molding machine A of the present embodiment is provided with a safety device B for preventing the injection device 2 from dropping.

型締装置１は、図１に示すように、マシンボディ３の上面に固定された固定盤４と、この固定盤４とマシンボディ３を貫通して上下方向に延設された３本のタイバー５（図１では２本が図示）の上端に固定され、固定盤４の上方に配設された可動盤６と、タイバー５の下端に固定されて固定盤４の下方に配設されたエンドプレート７と、エンドプレート７と固定盤４の間に設けられた上下に伸縮自在のトグル機構（型締機構）８と、マシンボディ３に取り付けられトグル機構８を伸縮作動させてエンドプレート７とタイバー５を介して可動盤６を上下方向に移動させる駆動装置９とを備えて構成されている。 As shown in FIG. 1, the mold clamping device 1 includes a stationary platen 4 fixed to the upper surface of the machine body 3, and three tie bars extending vertically through the stationary platen 4 and the machine body 3. 5 (two are shown in FIG. 1) are fixed to the upper end of the fixed platen 4 and the movable platen 6 is arranged above the fixed platen 4 and the end is fixed to the lower end of the tie bar 5 and arranged below the fixed platen 4. A plate 7, a toggle mechanism 8 (clamping mechanism) 8 provided between the end plate 7 and the stationary platen 4, and an end plate 7 attached to the machine body 3 to extend and retract. And a drive device 9 for moving the movable platen 6 in the vertical direction via the tie bar 5.

固定盤４は、略平盤状の固定側基盤であり、その上面が竪型射出成形機Ａの上下方向（垂直方向）に延びる軸線Ｏ１に直交する水平面とされている。また、この固定盤４の上面側には、一対の金型Ｋ１、Ｋ２のうちこの上面に載置された固定側金型Ｋ１を保持する図示せぬ複数のボルト締結孔やガイド部などからなる金型保持部が形成されている。 The fixed platen 4 is a substantially flat plate-like fixed side base, and its upper surface is a horizontal plane orthogonal to the axis O1 extending in the vertical direction (vertical direction) of the vertical injection molding machine A. Further, on the upper surface side of the fixed platen 4, a plurality of bolt fastening holes (not shown) and guide portions for holding the fixed mold K 1 placed on the upper surface of the pair of molds K 1 and K 2 are formed. A mold holding part is formed.

可動盤６は、略平盤状に形成されており、その軸線を竪型射出成形機Ａの軸線Ｏ１と同軸上に配した状態で設けられており、固定盤４の上面と対向する下面側に、射出成形時に固定側金型Ｋ１と型締めされる可動側金型Ｋ２を保持する図示せぬ金型保持部が設けられている。さらに、可動盤６には、その軸線を中心として上面から下面に貫通し、一対の金型Ｋ１、Ｋ２を型締めした状態で、射出装置２の加熱筒１０の先端側に設けられた射出ノズル（先端部）１１が挿通する射出ノズル挿通孔１２が形成されている。 The movable plate 6 is formed in a substantially flat plate shape, and is provided in a state where its axis is arranged coaxially with the axis O 1 of the vertical injection molding machine A, and the lower side facing the upper surface of the fixed plate 4. In addition, a mold holding unit (not shown) that holds the fixed mold K1 and the movable mold K2 that is clamped at the time of injection molding is provided. Further, the movable plate 6 has an injection nozzle provided on the front end side of the heating cylinder 10 of the injection device 2 in a state where the pair of molds K1 and K2 are clamped while penetrating from the upper surface to the lower surface around the axis. An injection nozzle insertion hole 12 through which the (tip portion) 11 is inserted is formed.

３本のタイバー５は、図１及び図４に示すように、正面視で互いに平行に、且つそれぞれの軸線を垂直方向に配した状態で設けられ、平面視で各タイバー５の軸線を結ぶ直線からなる形状が正三角形または二等辺三角形を呈するように配置されている。また、３本のタイバー５のうち、１本のタイバー５ａは、竪型射出成形機Ａの正面Ａ１側に配置され、残りの２本のタイバー５ｂは、竪型射出成形機Ａの背面Ａ２側に配設されている。 As shown in FIGS. 1 and 4, the three tie bars 5 are provided in parallel with each other in a front view and with their axes arranged in a vertical direction, and are straight lines connecting the axes of the tie bars 5 in a plan view. Are arranged so as to present an equilateral triangle or an isosceles triangle. Of the three tie bars 5, one tie bar 5a is arranged on the front surface A1 side of the vertical injection molding machine A, and the remaining two tie bars 5b are on the back surface A2 side of the vertical injection molding machine A. It is arranged.

トグル機構８は、図１に示すように、トグルリンク１５とトグルピン１６とトグルピース１７とクロスヘッド１８がそれぞれ回動自在に連結されて形成されており、伝動ベルト１９を介してモータ（駆動装置）９に接続したねじ軸２０がその軸線回りに正逆回転すると、このねじ軸２０に接続したクロスヘッド１７が上下移動する。そして、トグルリンク１５とトグルピース１７とがそれぞれの連結部分で回動し上下方向に伸縮するように移動することによって、エンドプレート７が上下に移動する。これにより、エンドプレート７に一体に固定した３本のタイバー５が上下に移動し、可動盤６が上下動する。 As shown in FIG. 1, the toggle mechanism 8 is formed by a toggle link 15, a toggle pin 16, a toggle piece 17, and a crosshead 18 that are rotatably connected to each other, and a motor (drive device) via a transmission belt 19. When the screw shaft 20 connected to 9 rotates forward and backward around the axis, the cross head 17 connected to the screw shaft 20 moves up and down. Then, the toggle link 15 and the toggle piece 17 are rotated at their respective connecting portions and moved so as to expand and contract in the vertical direction, whereby the end plate 7 moves up and down. Thereby, the three tie bars 5 fixed integrally to the end plate 7 move up and down, and the movable platen 6 moves up and down.

射出装置２は、図２から図４に示すように、可動盤に繋がり竪型射出成形機Ａの軸線Ｏ１方向に平行に立設された一対のガイド支柱部３０に水平方向の両端が接続されて上下方向に進退自在に支持され、加熱筒１０の上端が着脱可能に接続されて加熱筒１０を支持する加熱筒支持部材３１と、加熱筒支持部材３１の上方に上下方向に進退自在に設けられ、加熱筒１０の内部に挿入したスクリュー３２を支持するとともに軸線回りに回転させる射出用駆動モータ３３が取り付けられたスクリュー支持部材３４とを備えて構成されている。 As shown in FIGS. 2 to 4, the injection device 2 has both ends in the horizontal direction connected to a pair of guide column portions 30 that are connected to a movable plate and are erected in parallel to the direction of the axis O <b> 1 of the vertical injection molding machine A. And a heating cylinder support member 31 that supports the heating cylinder 10 with the upper end of the heating cylinder 10 being detachably connected to the heating cylinder 10, and is provided above the heating cylinder support member 31 so as to be able to advance and retract in the vertical direction. And a screw support member 34 to which an injection drive motor 33 that supports the screw 32 inserted into the heating cylinder 10 and rotates around the axis is attached.

また、竪型射出成形機Ａには、図３に示すように、加熱筒支持部材３１ひいては加熱筒１０を上下方向に進退させるための加熱筒進退機構（フィード機構）３５が設けられている。この加熱筒進退機構３５は、例えばサーボモータなどの第一駆動部３５ａと、この第一駆動部３５ａに下端が繋がり上下方向に軸線を配して加熱筒支持部材３１に接続されたねじ軸３５ｂとを備えて構成されており、第一駆動部３５ａの駆動によってねじ軸３５ｂが軸線回りに正逆回転することで、加熱筒支持部材３１を上下方向に進退移動させる。 In addition, as shown in FIG. 3, the vertical injection molding machine A is provided with a heating cylinder advancing / retreating mechanism (feed mechanism) 35 for advancing and retracting the heating cylinder support member 31 and thus the heating cylinder 10 in the vertical direction. The heating cylinder advancing / retreating mechanism 35 includes, for example, a first drive unit 35a such as a servo motor, and a screw shaft 35b connected to the heating cylinder support member 31 with a lower end connected to the first drive unit 35a and an axis line in the vertical direction. And the screw shaft 35b rotates forward and backward around the axis by driving the first drive unit 35a, thereby moving the heating cylinder support member 31 forward and backward.

さらに、竪型射出成形機Ａには、図２から図４に示すように、スクリュー支持部材３４ひいてはスクリュー３２を上下方向に進退させるためのスクリュー進退機構３６が設けられている。このスクリュー進退機構３６は、一対のガイド支柱部３０の上端側に軸線を上下方向に配してそれぞれ軸線回りに回転可能に支持された一対のねじ軸３６ａと、これら一対のねじ軸３６ａを同期して回転させる回転機構３６ｂとを備えて構成されている。回転機構３６ｂは、一対のねじ軸３６ａにそれぞれ取り付けられたプーリ３６ｃと、加熱筒支持部材３１の竪型射出成形機Ａの背面Ａ２側に取り付けられて支持された例えばサーボモータなどの第二駆動部３６ｄと、第二駆動部３６ｄの回転軸に取り付けられたプーリ３６ｅと一対のねじ軸３６ａに取り付けたそれぞれのプーリ３６ｃに巻き回される無端状の伝動ベルト３６ｆとを備えて構成されている。このように構成した回転機構３６ｂは、第二駆動部３６ｄを駆動すると、伝動ベルト３６ｆが回動し、この伝動ベルト３６ｆの回動によって一対のねじ軸３６ａがプーリ３６ｃを介して同期して回転する。そして、一対のねじ軸３６ａの回転とともに、その回転方向に応じてスクリュー支持部材３４ひいてはスクリュー３２が上下方向に進退移動する。 Further, as shown in FIGS. 2 to 4, the vertical injection molding machine A is provided with a screw advance / retreat mechanism 36 for advancing and retreating the screw support member 34 and thus the screw 32 in the vertical direction. The screw advance / retreat mechanism 36 synchronizes the pair of screw shafts 36a with a pair of screw shafts 36a supported on the upper end sides of the pair of guide struts 30 so as to be rotatable about the axis. And a rotation mechanism 36b that rotates the rotation mechanism 36b. The rotation mechanism 36b includes a pulley 36c attached to each of the pair of screw shafts 36a, and a second drive such as a servo motor attached and supported on the back surface A2 side of the vertical injection molding machine A of the heating cylinder support member 31. 36d, a pulley 36e attached to the rotation shaft of the second drive portion 36d, and an endless transmission belt 36f wound around each pulley 36c attached to the pair of screw shafts 36a. . In the rotation mechanism 36b configured as described above, when the second drive unit 36d is driven, the transmission belt 36f rotates, and the rotation of the transmission belt 36f causes the pair of screw shafts 36a to rotate synchronously via the pulley 36c. To do. Then, along with the rotation of the pair of screw shafts 36a, the screw support member 34, and thus the screw 32, moves forward and backward in the vertical direction according to the rotation direction.

ここで、射出装置２の加熱筒支持部材３１には、図２及び図３に示すように、接続した加熱筒１０の内部に樹脂原料（成形材料）を供給するための貫通孔３１ａが形成され、この貫通孔３１ａに図示せぬホッパー内の樹脂原料を供給する供給管３７が接続されている。また、加熱筒１０には、図２に示すように、その外周面に加熱筒１０内に供給された樹脂原料を溶融するための複数のヒータ３８が設けられ、さらに、先端に、加熱筒進退機構３５の駆動によって加熱筒１０が下方に移動した際に、可動盤６の射出ノズル挿通孔１２に挿通されて可動側金型Ｋ２に接続される射出ノズル（先端部）１１が設けられている。 Here, as shown in FIGS. 2 and 3, the heating cylinder support member 31 of the injection device 2 is formed with a through hole 31 a for supplying a resin raw material (molding material) into the connected heating cylinder 10. A supply pipe 37 for supplying a resin raw material in a hopper (not shown) is connected to the through hole 31a. Further, as shown in FIG. 2, the heating cylinder 10 is provided with a plurality of heaters 38 for melting the resin raw material supplied into the heating cylinder 10 on its outer peripheral surface, and further, at the tip, the heating cylinder is advanced and retracted. When the heating cylinder 10 is moved downward by driving the mechanism 35, there is provided an injection nozzle (tip portion) 11 that is inserted into the injection nozzle insertion hole 12 of the movable platen 6 and connected to the movable mold K2. .

また、可動盤６の上面には、図５及び図６に示すように、加熱筒１０の先端側の側面を覆うように開閉式のパージカバー４０が設けられている。このパージカバー４０は、射出成形作業時に作業者と溶融樹脂を射出する加熱筒１０の先端部１１とを遮断して、作業者の安全性を確保するためのものである。このパージカバー４０には、射出する樹脂の種類を変えるためにパージした樹脂を排除させたり、射出ノズル１１などのメンテナンスを行う際に、作業者が竪型射出成形機の外側（正面Ａ１側）から加熱筒１０の先端側を臨めるように、竪型射出成形機Ａの正面Ａ１側に開閉可能な扉４０ａが具備されている。 Further, as shown in FIGS. 5 and 6, an openable / closable purge cover 40 is provided on the upper surface of the movable plate 6 so as to cover the side surface on the tip side of the heating cylinder 10. The purge cover 40 is intended to ensure the safety of the operator by shutting off the operator and the distal end portion 11 of the heating cylinder 10 that injects the molten resin during the injection molding operation. In the purge cover 40, when the purged resin is removed to change the type of resin to be injected, or when the maintenance of the injection nozzle 11 or the like is performed, an operator can move the outside of the vertical injection molding machine (front A1 side). A door 40a that can be opened and closed is provided on the front surface A1 side of the vertical injection molding machine A so that the front end side of the heating cylinder 10 can be seen.

一方、本実施形態において、パージした樹脂の排除や射出ノズル１１のメンテナンスを作業者が行う際に、射出装置２が落下することを防止するための安全装置Ｂが設けられている。この安全装置Ｂは、図５及び図６に示すように、加熱筒支持部材３１（射出装置２）の背面Ａ２側に固定して軸線Ｏ１方向に延設されつつ支持され、背面Ａ２側を向く側端側に多段状（鋸歯状）の鋸歯部４１ａを備える第一係止部材（鋸歯部材）４１と、ガイド支柱部３０に支持され、すなわち可動盤６に固定して支持され、背面Ａ２側から正面Ａ１側に向く方向に進退自在に設けられた第二係止部材（ストッパー部）４２と、ストッパー部４２を進退させるストッパー進退機構４３とを備えて構成されている。 On the other hand, in the present embodiment, a safety device B is provided for preventing the injection device 2 from falling when an operator performs the removal of the purged resin and the maintenance of the injection nozzle 11. As shown in FIGS. 5 and 6, the safety device B is fixed to the back surface A2 side of the heating cylinder support member 31 (injection device 2) and supported while being extended in the direction of the axis O1, and faces the back surface A2 side. A first locking member (sawtooth member) 41 having a multi-stage (sawtooth) sawtooth portion 41a on the side end side, and supported by the guide post portion 30, that is, fixedly supported by the movable platen 6, and on the back surface A2 side Is provided with a second locking member (stopper portion) 42 provided so as to be movable forward and backward in the direction toward the front A1 side, and a stopper advance / retreat mechanism 43 for moving the stopper portion 42 back and forth.

ストッパー進退機構４３は、ストッパー部４２を進退可能に保持する進退溝４３ａを備え、ガイド支柱部３０に取り付けられたストッパー保持部材４３ｂと、ストッパー部４２の背面Ａ２側を向く後端と、ストッパー保持部材４３ｂの正面Ａ１側を向く面との間の進退溝４３ａ内に設けられ、ストッパー部４２を進退溝４３ａから正面Ａ１側に進出させるように付勢するバネ部材４３ｃと、一端がストッパー部４２の後端に接続され、他端がパージカバー４０の扉４０ａに繋がり、ストッパー部４２とパージカバー４０の間に設けられたケーブル（連動部材）４３ｄとを備えて構成されている。このように構成したストッパー進退機構４３においては、パージカバー４０の扉４０ａが閉じた状態で、ケーブル４３ｄが引っ張られ、この状態のケーブル４３ｄの張力によってストッパー部４２が進退溝４３ａ内に後退させられている。一方、パージカバー４０の扉４０ａを開く（パージカバー４０を開放する）と、ケーブル４３ｄが緩んでその張力が小さくなり、バネ部材４３ｃの付勢力によってストッパー部４２が進退溝４３ａから突出するように進出して、先端が竪型射出成形機Ａの正面Ａ１側に配される。 The stopper advancing / retracting mechanism 43 includes an advancing / retracting groove 43a for holding the stopper portion 42 so as to be able to advance and retreat, a stopper holding member 43b attached to the guide support column 30, a rear end facing the back surface A2 side of the stopper portion 42, and a stopper holding A spring member 43c provided in an advance / retreat groove 43a between the surface of the member 43b facing the front A1 side and biasing the stopper portion 42 to advance from the advance / retreat groove 43a toward the front A1 side, and one end of the stopper portion 42. The other end is connected to the door 40a of the purge cover 40, and a cable (interlocking member) 43d provided between the stopper portion 42 and the purge cover 40 is provided. In the stopper advance / retreat mechanism 43 configured as described above, the cable 43d is pulled with the door 40a of the purge cover 40 closed, and the stopper portion 42 is retracted into the advance / retreat groove 43a by the tension of the cable 43d in this state. ing. On the other hand, when the door 40a of the purge cover 40 is opened (the purge cover 40 is opened), the cable 43d is loosened to reduce its tension, and the stopper portion 42 protrudes from the advance / retreat groove 43a by the urging force of the spring member 43c. Advancing and the tip is arranged on the front A1 side of the vertical injection molding machine A.

ついで、上記の構成からなる竪型射出成形機Ａの安全装置Ｂの作用及び効果について説明する。 Next, the operation and effect of the safety device B of the vertical injection molding machine A configured as described above will be described.

ここで、本実施形態の竪型射出成形機Ａを用いて成形品を製造する際には、型締装置１の型締機構（トグル機構）８を駆動して固定盤４が保持した固定側金型Ｋ１と可動盤６が保持した可動側金型Ｋ２とを型締した段階で、射出装置２の加熱筒進退機構３５を駆動するとともに、加熱筒支持部材３１及びこれに取り付けた加熱筒１０を下方に移動する。そして、加熱筒１０の先端に設けた射出ノズル１１を可動盤６の射出ノズル挿通孔１２に挿入しつつ可動側金型Ｋ２と接続する。ついで、射出用駆動モータ３３を駆動することによって加熱筒１０内に挿入したスクリュー３２を回転させ、加熱筒１０に供給した樹脂原料を下方に撹拌移動させつつ溶融させて、さらにスクリュー進退機構３６を駆動してスクリュー３２を前進移動させることによって、射出ノズル１１から所定量の溶融樹脂を一対の金型Ｋ１、Ｋ２のキャビティー内に射出する。ついで、加熱筒進退機構３５及びスクリュー進退機構３６を駆動して加熱筒１０及びスクリュー３２を上方に退避させる。そしてキャビティー内の溶融樹脂が冷却固化した段階で、一対の金型Ｋ１、Ｋ２を開放するように型締機構８を駆動し、可動盤６を上方に移動させて成形品を取り出す。 Here, when a molded product is manufactured using the vertical injection molding machine A of the present embodiment, the mold clamping mechanism (toggle mechanism) 8 of the mold clamping apparatus 1 is driven and the fixed side held by the stationary platen 4 is held. At the stage where the mold K1 and the movable mold K2 held by the movable platen 6 are clamped, the heating cylinder advancing / retracting mechanism 35 of the injection device 2 is driven, and the heating cylinder support member 31 and the heating cylinder 10 attached thereto are driven. Move down. Then, the injection nozzle 11 provided at the tip of the heating cylinder 10 is connected to the movable mold K2 while being inserted into the injection nozzle insertion hole 12 of the movable platen 6. Next, by driving the injection drive motor 33, the screw 32 inserted into the heating cylinder 10 is rotated, and the resin material supplied to the heating cylinder 10 is melted while being stirred and moved downward. By driving and moving the screw 32 forward, a predetermined amount of molten resin is injected from the injection nozzle 11 into the cavities of the pair of molds K1 and K2. Next, the heating cylinder advance / retreat mechanism 35 and the screw advance / retreat mechanism 36 are driven to retract the heating cylinder 10 and the screw 32 upward. When the molten resin in the cavity is cooled and solidified, the mold clamping mechanism 8 is driven so as to open the pair of molds K1 and K2, and the movable platen 6 is moved upward to take out the molded product.

このように成形品を製造する際に、樹脂の種類を変更する場合や加熱筒１０内から樹脂を排出する場合には、すなわち、パージ作業を行なう際には、はじめに、加熱筒１０の射出ノズル１１を可動盤６の上方に配し、すなわち加熱筒進退機構３５の駆動を調整し、可動盤６と射出ノズル１１との間に適度な隙間をあけて、加熱筒支持部材３１ひいては加熱筒１０を定置させる。ついで、作業者が、パージカバー４０の扉４０ａを開いて、可動盤６と射出ノズル１１との隙間に容器を挿入する。そして、ホッパーに新たな樹脂原料を投入し供給管３７を通じて加熱筒１０内の上方からこの新たな樹脂を供給するとともに、スクリュー３２を回転させつつ新たな樹脂を溶融させる。さらに、スクリュー３２を前進移動させることによって、射出ノズル１１から容器に古い樹脂を排出（パージ）し、この射出ノズル１１から排出される樹脂の状態を作業者が確認する。そして、新たな樹脂が排出されはじめた段階で、すなわち、加熱筒１０内の古い樹脂が全て排出されたことを確認した段階で、容器とともにこの容器に収容した古い樹脂をパージカバー４０の外に取り出し、再度上記の操作を行なって、新たな樹脂による成形品を製造する。 When the molded product is manufactured in this way, when the type of resin is changed or when the resin is discharged from the heating cylinder 10, that is, when performing the purge operation, first, the injection nozzle of the heating cylinder 10 is used. 11 is arranged above the movable platen 6, that is, the driving of the heating cylinder advancing / retracting mechanism 35 is adjusted, and an appropriate gap is provided between the movable platen 6 and the injection nozzle 11, and the heating cylinder support member 31 and the heating cylinder 10 are thereby provided. Is placed. Next, the operator opens the door 40 a of the purge cover 40 and inserts the container into the gap between the movable platen 6 and the injection nozzle 11. Then, a new resin raw material is introduced into the hopper, and the new resin is supplied from above in the heating cylinder 10 through the supply pipe 37, and the new resin is melted while rotating the screw 32. Further, by moving the screw 32 forward, old resin is discharged (purged) from the injection nozzle 11 into the container, and the operator confirms the state of the resin discharged from the injection nozzle 11. When the new resin starts to be discharged, that is, when it is confirmed that all the old resin in the heating cylinder 10 has been discharged, the old resin stored in the container together with the container is placed outside the purge cover 40. The product is taken out and the above operation is performed again to produce a molded product made of a new resin.

また、射出ノズル１１のメンテナンスを行う場合には、加熱筒進退機構３５の駆動を調整し、可動盤６と射出ノズル１１との間に適度な隙間をあけ、加熱筒支持部材３１ひいては加熱筒１０を定置させてパージ作業を行なった後に、加熱筒１０が冷却したことを確認する。そして、作業者が、竪型射出成形機Ａの外側からパージカバー４０内に手やメンテナンス用工具などを挿入しながらメンテナンスを行なう。 When maintenance of the injection nozzle 11 is performed, the driving of the heating cylinder advancing / retreating mechanism 35 is adjusted, an appropriate gap is formed between the movable platen 6 and the injection nozzle 11, and the heating cylinder support member 31 and the heating cylinder 10 are thereby opened. After the purge operation is performed with the fixed position, it is confirmed that the heating cylinder 10 has cooled. Then, the operator performs maintenance while inserting a hand or a maintenance tool into the purge cover 40 from the outside of the vertical injection molding machine A.

このように、パージ作業やメンテナンス作業を行なう場合には、パージカバー４０の扉４０ａを開いて、可動盤６と射出ノズル１１との間の隙間に、作業者が手や身体の一部を入れながら作業を行なうことになる。このとき、本実施形態のような安全装置Ｂを具備せぬ従来の射出成形機においては、可動盤６と射出ノズル１１との間に適度な隙間を設けて定置させた大重量の加熱筒支持部材３１及び加熱筒１０が、加熱筒進退機構３５の第一駆動部（フィード機構のモータ）３５ａに内蔵された不動作時のブレーキのみで保持されている。このため、第一駆動部３５ａのブレーキが破損した場合には、大重量の加熱筒支持部材３１及び加熱筒１０が急に落下し、パージカバー４０内及び可動盤６と射出ノズル１１の隙間に身体の一部を入れた作業者に重大な身体的損傷を負わせるような事故が発生するおそれがある。 Thus, when performing a purge operation or a maintenance operation, the door 40a of the purge cover 40 is opened, and an operator puts a hand or a part of the body into the gap between the movable platen 6 and the injection nozzle 11. Will work. At this time, in a conventional injection molding machine that does not include the safety device B as in the present embodiment, a large-weight heating cylinder is supported with a moderate gap between the movable platen 6 and the injection nozzle 11. The member 31 and the heating cylinder 10 are held only by a non-operating brake built in the first drive portion (motor of the feed mechanism) 35a of the heating cylinder advance / retreat mechanism 35. For this reason, when the brake of the first drive unit 35a is damaged, the heavy heating cylinder support member 31 and the heating cylinder 10 suddenly fall, and in the purge cover 40 and the gap between the movable platen 6 and the injection nozzle 11. Accidents may occur that cause serious physical damage to workers with a body part.

これに対し、本実施形態の竪型射出成形機Ａにおいては、上記の安全装置Ｂが設けられているため、パージ作業やメンテナンス作業を行なう際、パージカバー４０の扉４０ａを開くとともに、ストッパー進退機構４３のケーブル４３ｄが緩んでその張力が小さくなり、バネ部材４３ｃの付勢力によってストッパー部４２が進退溝４３ａから外側に進出する。そして、この竪型射出成形機Ａの正面Ａ１側に突出するように進出したストッパー部４２の先端が、加熱筒支持部材３１に取り付けられた鋸歯部材４１の鋸歯部４１ａに噛合する。これにより、加熱筒支持部材３１が鋸歯部材４１を介してストッパー部４２で支持され、その下方への移動が機械的に規制されることになる。 On the other hand, in the vertical injection molding machine A of the present embodiment, the safety device B is provided. Therefore, when performing the purge operation or the maintenance operation, the door 40a of the purge cover 40 is opened and the stopper is advanced or retracted. The cable 43d of the mechanism 43 is loosened to reduce its tension, and the stopper portion 42 is advanced outward from the advance / retreat groove 43a by the urging force of the spring member 43c. And the front-end | tip of the stopper part 42 which advanced so that it may protrude in the front A1 side of this vertical injection molding machine A meshes with the saw-tooth part 41a of the saw-tooth member 41 attached to the heating cylinder support member 31. As a result, the heating cylinder support member 31 is supported by the stopper portion 42 via the sawtooth member 41, and the downward movement thereof is mechanically restricted.

したがって、上記の竪型射出成形機Ａの安全装置Ｂによれば、第一駆動部３５ａのブレーキが万一破損するような場合においても、加熱筒支持部材３１に取り付けられた鋸歯部材４１の鋸歯部４１ａと、ガイド支柱部３０に取り付けられたストッパー部４２とが噛合（係合）することによって、簡易な構成で大重量の加熱筒支持部材３１及び加熱筒１０の下方への移動を機械的に規制できるため、大重量の加熱筒支持部材３１及び加熱筒１０（射出装置２）が急に落下することを確実に防止することができ、パージ作業やメンテナンス作業を行なう際に、パージカバー４０内及び可動盤６と射出ノズル１１との隙間に身体の一部を入れた作業者に重大な身体的損傷を負わせるような事故が発生することを確実に防止できる。 Therefore, according to the safety device B of the vertical injection molding machine A described above, even if the brake of the first drive unit 35a is damaged, the saw blade of the saw blade member 41 attached to the heating cylinder support member 31 is used. When the portion 41a and the stopper portion 42 attached to the guide column 30 are engaged (engaged), it is possible to mechanically move the heavy heating tube support member 31 and the heating tube 10 downward with a simple configuration. Therefore, it is possible to reliably prevent the heavy-weight heating cylinder support member 31 and the heating cylinder 10 (injection device 2) from dropping suddenly, and the purge cover 40 can be used when performing a purge operation or a maintenance operation. It is possible to reliably prevent an accident that causes serious physical damage to an operator who puts a part of the body in the gap between the inner and movable plates 6 and the injection nozzle 11.

また、パージ作業やメンテナンス作業を行なうためにパージカバー４０の扉４０ａを開くと同時に、ストッパー部４２を進出させて鋸歯部材４１の鋸歯部４１ａに自動的に噛合させることができ、また、パージカバー４０の扉４０ａを閉じると同時にストッパー部４２を退避させてやはり自動的に鋸歯部材４１との噛合状態を解除することができるため、パージ作業やメンテナンス作業を行なう際に、作業者による特別な操作を要することなく、確実に作業者の安全性を確保することができる。また、作業者による特別な操作を要することなく、成形作業を行なう状態に戻すことができる。 Further, at the same time when the door 40a of the purge cover 40 is opened to perform a purge operation or a maintenance operation, the stopper portion 42 can be advanced and automatically engaged with the sawtooth portion 41a of the sawtooth member 41. When the door 40a is closed, the stopper portion 42 can be retracted at the same time to automatically release the meshing state with the sawtooth member 41, so that a special operation by the operator is performed when performing a purge operation or a maintenance operation. Therefore, it is possible to ensure the safety of the worker without fail. Moreover, it can return to the state which performs a shaping | molding operation | work, without requiring special operation by an operator.

さらに、鋸歯部材（第一係止部材）４１が、多段状の鋸歯部４１ａを備えて形成されているため、任意の位置の鋸歯部４１ａにストッパー部（第二係止部材）４２を係合させて、射出装置２を任意の上下位置で係止することができ、パージ作業やメンテナンス作業を行なう作業者に好適な位置で容易に射出装置２を支持することが可能になる。 Further, since the sawtooth member (first locking member) 41 is formed with a multi-stage sawtooth portion 41a, the stopper portion (second locking member) 42 is engaged with the sawtooth portion 41a at an arbitrary position. Thus, the injection device 2 can be locked at an arbitrary vertical position, and the injection device 2 can be easily supported at a position suitable for an operator who performs a purge operation or a maintenance operation.

なお、本発明は、上記の第１実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。例えば、本実施形態では、安全装置Ｂが、鋸歯部４１ａを備えた鋸歯部材（第一係止部材）４１を加熱筒支持部材３１に取り付け、ストッパー部（第二係止部材）４２が、可動盤６に固定して支持されたガイド支柱部３０と、このガイド支柱部３０に取り付けたストッパー保持部材４３ｂとを介して、可動盤６に固定して支持されるように取り付けられているものとしたが、図７に示すように、鋸歯部４１ａを竪型射出成形機Ａの正面Ａ１側に向けて鋸歯部材４１をガイド支柱部３０に取り付け、ストッパー進退機構４３のケーブル４３ｄに繋がるストッパー部４２を加熱筒支持部材３１にストッパー保持部材４３ｂを介して取り付けてもよい。加えて、第一係止部材４１または第二係止部材４２のどちらか一方は、可動盤６に直接固着したり、ガイド支柱部３０と異なる可動盤３に固定して支持された他の部材に取り付けて、可動盤６に固定して支持されるように設けられてもよく、射出装置２の上下動をガイドするガイド支柱部３０を介して可動盤６に固定して支持させる必要はない。このため、本発明は、本実施形態に示したガイド支柱部３０が可動盤６に繋がっていない、すなわち射出装置２が可動盤６に支持されていない竪型射出成形機にも適用可能である。 In addition, this invention is not limited to said 1st Embodiment, In the range which does not deviate from the meaning, it can change suitably. For example, in this embodiment, the safety device B attaches the sawtooth member (first locking member) 41 having the sawtooth portion 41a to the heating cylinder support member 31, and the stopper portion (second locking member) 42 is movable. A guide post 30 fixedly supported on the board 6 and a stopper holding member 43b attached to the guide post 30 so as to be fixed and supported on the movable board 6; However, as shown in FIG. 7, the sawtooth member 41 is attached to the guide post 30 with the sawtooth portion 41a facing the front surface A1 side of the vertical injection molding machine A, and the stopper portion 42 is connected to the cable 43d of the stopper advance / retreat mechanism 43. May be attached to the heating cylinder support member 31 via a stopper holding member 43b. In addition, one of the first locking member 41 and the second locking member 42 is directly fixed to the movable platen 6, or another member fixedly supported on the movable platen 3 different from the guide column 30. It may be provided so as to be fixed to and supported by the movable platen 6, and it is not necessary to fix and support the movable platen 6 via the guide column part 30 that guides the vertical movement of the injection device 2. . For this reason, the present invention is also applicable to a vertical injection molding machine in which the guide column 30 shown in the present embodiment is not connected to the movable platen 6, that is, the injection device 2 is not supported by the movable platen 6. .

また、本実施形態では、第一係止部材（鋸歯部材）４１が、多段状の鋸歯部４１ａを備えて形成されているものとしたが、第二係止部材（ストッパー部）４２と係合可能であれば、必ずしも多段状に形成される必要はない。 Further, in the present embodiment, the first locking member (sawtooth member) 41 is formed with the multi-stage sawtooth portion 41a, but is engaged with the second locking member (stopper portion) 42. If possible, it need not be formed in a multi-stage shape.

さらに、本実施形態では、パージカバー４０と第二係止部材４２との間にケーブル（連動部材）４３ｄが設けられ、パージカバー４０の扉４０ａを開くとともに、ケーブル４３ｄを介して第二係止部材４２が第一係止部材４１と係合するように自動的に移動するものとしたが、連動部材４３ｄは、パージカバー４０の開放動作と第二係止部材４２の移動動作を連動させることができれば、特にケーブルに限定する必要はない。また、例えばパージカバー４０の開閉を検知するリミットスイッチなどの検知手段をパージカバー４０に設けておき、作業者がパージカバー４０の扉４０ａを開く（パージカバー４０の開放動作）と同時に、この開放動作をリミットスイッチで検知させ、この検知結果を基に第二係止部材４２を移動させて、第一係止部材４１と第二係止部材４２とを自動的に係合させるように構成してもよい。この場合においても、本実施形態と同様に、パージ作業やメンテナンス作業を行なう際に、作業者による特別な操作を要することなく、確実に作業者の安全性を確保することができる。 Furthermore, in this embodiment, a cable (interlocking member) 43d is provided between the purge cover 40 and the second locking member 42, and the door 40a of the purge cover 40 is opened and the second locking is performed via the cable 43d. Although the member 42 automatically moves so as to engage with the first locking member 41, the interlocking member 43d interlocks the opening operation of the purge cover 40 and the moving operation of the second locking member 42. If it is possible, there is no need to limit to a cable. Further, for example, a detection means such as a limit switch for detecting opening / closing of the purge cover 40 is provided in the purge cover 40, and at the same time the operator opens the purge cover 40 door 40a (opening operation of the purge cover 40). The operation is detected by a limit switch, the second locking member 42 is moved based on the detection result, and the first locking member 41 and the second locking member 42 are automatically engaged. May be. Even in this case, as in the present embodiment, when performing a purge operation or a maintenance operation, the operator's safety can be reliably ensured without requiring a special operation by the operator.

ついで、図８及び図９を参照し、本発明の第２実施形態に係る竪型射出成形機の安全装置について説明する。本実施形態の説明においては、第１実施形態に共通する構成について同一符号を付し、その詳細についての説明を省略する。なお、第１実施形態と異なり、本実施形態の竪型射出成形機Ａには、パージカバー４０が設けられていない。 Next, a safety device for a vertical injection molding machine according to a second embodiment of the present invention will be described with reference to FIGS. In the description of the present embodiment, the same reference numerals are given to the components common to the first embodiment, and the detailed description thereof is omitted. Unlike the first embodiment, the vertical injection molding machine A of the present embodiment is not provided with the purge cover 40.

本実施形態の竪型射出成形機Ａの安全装置Ｃは、図８及び図９に示すように、パージ作業やメンテナンス作業を行なう際に、加熱筒１０の先端部１１に近づく作業者を検知するための光電管（センサ）５０が、加熱筒１０の近傍の可動盤６上に設けられている。 As shown in FIGS. 8 and 9, the safety device C of the vertical injection molding machine A according to the present embodiment detects an operator approaching the tip 11 of the heating cylinder 10 when performing a purge operation or a maintenance operation. A photoelectric tube (sensor) 50 is provided on the movable platen 6 in the vicinity of the heating cylinder 10.

また、本実施形態では、安全装置Ｃの第一係止部材が、第１実施形態と同様に、加熱筒支持部材３１の竪型射出成形機Ａの背面Ａ２側に固定して軸線Ｏ１方向に延設されつつ支持され、背面Ａ２側を向く側端側に多段状の鋸歯部４１ａを備える鋸歯部材４１とされている。一方、第二係止部材も第１実施形態と同様のストッパー部４２であるが、このストッパー部４２を進退させるストッパー進退機構４３が、ストッパー部４２を進退可能に保持する進退溝４３ａを備え、ガイド支柱部３０に取り付けられたストッパー保持部材４３ｂと、ストッパー部４２の背面Ａ２側を向く後端に繋がるアクチュエータ４３ｅとで構成されている。 In the present embodiment, the first locking member of the safety device C is fixed to the rear surface A2 side of the vertical injection molding machine A of the heating cylinder support member 31 in the direction of the axis O1 as in the first embodiment. The sawtooth member 41 is supported while being extended and includes a multi-step sawtooth portion 41a on the side end side facing the back surface A2. On the other hand, the second locking member is the same stopper portion 42 as in the first embodiment, but a stopper advance / retreat mechanism 43 that advances and retracts the stopper portion 42 includes an advance / retreat groove 43a that holds the stopper portion 42 so as to be able to advance and retract. The stopper holding member 43b attached to the guide column 30 and the actuator 43e connected to the rear end of the stopper 42 facing the back surface A2 side.

そして、このように構成したストッパー進退機構４３においては、パージ作業やメンテナンス作業を行なうために、作業者が加熱筒１０に近づくと、これを光電管５０が検知する。また、これと同時に、光電管５０から検知信号が図示せぬ制御手段に送られ、この信号を受けた制御手段がアクチュエータ４３ｅを駆動させ、ストッパー部４２を竪型射出成形機Ａの正面Ａ１側に突出するように進出させる。そして、第１実施形態と同様に、突出したストッパー部４２の先端が鋸歯部４１ａに係合し、加熱筒保持部材３１ひいては加熱筒１０の下方への移動が規制され、パージ作業やメンテナンス作業時に、射出装置２の落下が防止される。 In the stopper advance / retreat mechanism 43 configured as described above, the photoelectric tube 50 detects this when the operator approaches the heating cylinder 10 in order to perform a purge operation or a maintenance operation. At the same time, a detection signal is sent from the photoelectric tube 50 to a control means (not shown), and the control means that receives this signal drives the actuator 43e to move the stopper portion 42 to the front surface A1 side of the vertical injection molding machine A. Advance to project. As in the first embodiment, the protruding tip of the stopper portion 42 is engaged with the sawtooth portion 41a, and the downward movement of the heating cylinder holding member 31 and the heating cylinder 10 is restricted. The injection device 2 is prevented from falling.

したがって、本実施形態の竪型射出成形機Ａの安全装置Ｃによれば、パージ作業やメンテナンス作業を行なうために作業者が加熱筒１０に近づくと同時に、これを光電管５０が検知し、鋸歯部材４１とストッパー部４２とを自動的に係合させることができ、パージ作業やメンテナンス作業を行なう際に、作業者による特別な操作を要することなく、確実に作業者の安全性を確保することができる。 Therefore, according to the safety device C of the vertical injection molding machine A of the present embodiment, the photoelectric tube 50 detects and detects the sawtooth member as soon as the worker approaches the heating cylinder 10 in order to perform the purge operation and the maintenance operation. 41 and the stopper part 42 can be automatically engaged, and when performing a purge operation or a maintenance operation, the operator's safety can be reliably ensured without requiring a special operation by the operator. it can.

よって、パージ作業やメンテナンス作業を行なう際に、確実に射出装置の落下を防止できるため、加熱筒進退機構（フィード機構）３５の第一駆動部３５ａのブレーキが破損した場合においても、作業者の安全性を確保でき、重大事故が発生することを確実に防止できる。 Therefore, when performing the purge operation or the maintenance operation, the injection device can be reliably prevented from dropping, so that even if the brake of the first drive portion 35a of the heating cylinder advance / retreat mechanism (feed mechanism) 35 is broken, the operator's Safety can be ensured and serious accidents can be reliably prevented.

なお、本発明は、上記の第２実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。例えば、本実施形態では、加熱筒１０に近づく作業者を検知するセンサが光電管５０であるものとしたが、作業者を検知することが可能であれば、温度センサなど他のセンサであってもよい。また、必ずしもセンサ５０を設け、このセンサ５０の検知結果に基づいてアクチュエータ４３ｅを駆動し、第一係止部材４１と第二係止部材４２を自動的に係合させる構成でなくてもよく、例えば、アクチュエータ４３ｅを駆動させるスイッチを設け、作業者がこのスイッチを押す手動操作によって第一係止部材４１と第二係止部材４２を係合させる構成であってもよい。 In addition, this invention is not limited to said 2nd Embodiment, In the range which does not deviate from the meaning, it can change suitably. For example, in the present embodiment, the sensor that detects the worker approaching the heating cylinder 10 is the phototube 50, but other sensors such as a temperature sensor may be used as long as the operator can be detected. Good. The sensor 50 is not necessarily provided, and the actuator 43e is driven based on the detection result of the sensor 50 so that the first locking member 41 and the second locking member 42 are automatically engaged. For example, a switch for driving the actuator 43e may be provided, and the first locking member 41 and the second locking member 42 may be engaged by a manual operation in which an operator presses the switch.

本発明の第１及び第２実施形態に係る安全装置を備える竪型射出成形機を示す正面図である。It is a front view which shows a vertical injection molding machine provided with the safety device which concerns on 1st and 2nd embodiment of this invention. 図１の竪型射出成形機に具備される本発明の一実施形態に係る射出装置を示す正面図である。It is a front view which shows the injection apparatus which concerns on one Embodiment of this invention with which the vertical injection molding machine of FIG. 1 is equipped. 図１の竪型射出成形機に具備される本発明の一実施形態に係る射出装置を示す側断面図である。It is a sectional side view which shows the injection apparatus which concerns on one Embodiment of this invention with which the vertical injection molding machine of FIG. 1 is equipped. 図２のＸ１−Ｘ１線矢視図である。FIG. 3 is a view taken along line X1-X1 in FIG. 本発明の第１実施形態に係る竪型射出成形機の安全装置を示す側面図である。It is a side view showing a safety device of a vertical injection molding machine concerning a 1st embodiment of the present invention. 図５のＸ１−Ｘ１線矢視図である。FIG. 6 is a view taken along line X1-X1 in FIG. 5. 本発明の第１実施形態に係る竪型射出成形機の安全装置の変形例を示す側面図である。It is a side view which shows the modification of the safety device of the vertical injection molding machine which concerns on 1st Embodiment of this invention. 本発明の第２実施形態に係る竪型射出成形機の安全装置を示す側面図である。It is a side view which shows the safety device of the vertical injection molding machine which concerns on 2nd Embodiment of this invention. 図８のＸ１−Ｘ１線矢視図である。It is a X1-X1 line arrow directional view of FIG.

Explanation of symbols

１型締装置
２射出装置
３マシンボディ
４固定盤
５タイバー
６可動盤
７エンドプレート
８トグル機構（型締機構）
１０加熱筒
１１射出ノズル（先端部）
１２射出ノズル挿通孔
３０ガイド支柱部
３１加熱筒支持部材
３２スクリュー
３４スクリュー支持部材
３５加熱筒進退機構（フィード機構）
３５ａ第一駆動部
３５ｂねじ軸
３６スクリュー進退機構
３６ａねじ軸
３６ｂ回転機構
３６ｃプーリ
３６ｄ第二駆動部
３６ｅプーリ
３６ｆ伝動ベルト
４０パージカバー
４０ａ扉
４１第一係止部材（鋸歯部材）
４１ａ鋸歯部
４２第二係止部材（ストッパー部）
４３ストッパー進退機構
４３ａ進退溝
４３ｂストッパー保持部材
４３ｃバネ部材
４３ｄケーブル（連動部材）
４３ｅアクチュエータ
５０光電管（センサ）
Ａ竪型射出成形機
Ａ１正面
Ａ２背面
Ｂ安全装置
Ｃ安全装置
Ｋ１金型（固定側金型）
Ｋ２金型（可動側金型）
Ｏ１軸線 1 Clamping device 2 Injection device 3 Machine body 4 Fixed platen 5 Tie bar 6 Movable platen 7 End plate 8 Toggle mechanism (clamping mechanism)
10 Heating cylinder 11 Injection nozzle (tip)
12 Injection nozzle insertion hole 30 Guide column 31 Heating cylinder support member 32 Screw 34 Screw support member 35 Heating cylinder advance / retreat mechanism (feed mechanism)
35a First drive portion 35b Screw shaft 36 Screw advance / retreat mechanism 36a Screw shaft 36b Rotation mechanism 36c Pulley 36d Second drive portion 36e Pulley 36f Transmission belt 40 Purge cover 40a Door 41 First locking member (sawtooth member)
41a Sawtooth portion 42 Second locking member (stopper portion)
43 Stopper advance / retreat mechanism 43a Advance / retreat groove 43b Stopper holding member 43c Spring member 43d Cable (interlocking member)
43e Actuator 50 Photoelectric tube (sensor)
A Vertical injection molding machine A1 Front A2 Back B Safety device C Safety device K1 Mold (fixed side mold)
K2 mold (movable side mold)
O1 axis

Claims

A mold clamping device that opens and closes and molds the mold by moving the movable plate up and down with respect to the fixed plate by the mold clamping mechanism, and an injection device provided so as to be movable up and down with respect to the movable plate by the feed mechanism. A safety device for a vertical injection molding machine,
A first locking member fixedly supported on one of the injection device and the movable plate, and the first locking member on the injection device or the movable plate not supporting the first locking member And a second locking member supported so as to be engageable,
The injection device is provided with a heating cylinder for supplying a molding material into the cavity of the clamped mold, and an openable / closable purge cover for shutting off the tip of the heating cylinder from an operator. And
An interlocking member is provided between the purge cover and the second locking member. When the purge cover is opened, the second locking member moves via the interlocking member, and the first locking member and the second locking member A safety device for a vertical injection molding machine , wherein the second locking member automatically engages to prevent the injection device from dropping .

A mold clamping device that opens and closes and molds the mold by moving the movable plate up and down with respect to the fixed plate by the mold clamping mechanism, and an injection device provided so as to be movable up and down with respect to the movable plate by the feed mechanism. A safety device for a vertical injection molding machine,
A first locking member fixedly supported on one of the injection device and the movable plate, and the first locking member on the injection device or the movable plate not supporting the first locking member And a second locking member supported so as to be engageable,
The injection device is provided with a heating cylinder for supplying a molding material into the cavity of the clamped mold, and an openable / closable purge cover for shutting off the tip of the heating cylinder from an operator. And
Detection means for detecting opening and closing of the purge cover is provided. The detection means detects the opening operation of the purge cover, and the second locking member moves to move the first locking member and the second locking member. A safety device for a vertical injection molding machine , wherein a stop member is automatically engaged to prevent the injection device from falling .