JP2952602B2 - Plastic film heat sealing device - Google Patents

Plastic film heat sealing device

Info

Publication number
JP2952602B2
JP2952602B2 JP1342570A JP34257089A JP2952602B2 JP 2952602 B2 JP2952602 B2 JP 2952602B2 JP 1342570 A JP1342570 A JP 1342570A JP 34257089 A JP34257089 A JP 34257089A JP 2952602 B2 JP2952602 B2 JP 2952602B2
Authority
JP
Japan
Prior art keywords
seal bar
plastic film
movable seal
speed
movable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP1342570A
Other languages
Japanese (ja)
Other versions
JPH03197119A (en
Inventor
幹夫 戸谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Totani Giken Kogyo KK
Original Assignee
Totani Giken Kogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Totani Giken Kogyo KK filed Critical Totani Giken Kogyo KK
Priority to JP1342570A priority Critical patent/JP2952602B2/en
Publication of JPH03197119A publication Critical patent/JPH03197119A/en
Application granted granted Critical
Publication of JP2952602B2 publication Critical patent/JP2952602B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B29C65/7888—Means for handling of moving sheets or webs
    • B29C65/7891—Means for handling of moving sheets or webs of discontinuously moving sheets or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8225—Crank mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • B29C66/91643—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • B29C66/91643—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile
    • B29C66/91645—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile by steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93441—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed the speed being non-constant over time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/939—Measuring or controlling the joining process by measuring or controlling the speed characterised by specific speed values or ranges
    • B29C66/9392—Measuring or controlling the joining process by measuring or controlling the speed characterised by specific speed values or ranges in explicit relation to another variable, e.g. speed diagrams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/959—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables
    • B29C66/9592—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables in explicit relation to another variable, e.g. X-Y diagrams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets

Description

【発明の詳細な説明】 産業上の利用分野 この発明は、重ね合わせた２枚のプラスチックフイル
ムをヒートシールするための装置であり、特に、プラス
チックフイルムの送り期間およびヒートシール期間を不
等速制御し、プラスチックフイルムのシール時間を任意
に調整するようにしたプラスチックフイルムヒートシー
ル装置に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for heat-sealing two superposed plastic films, and more particularly, to control the feeding period and the heat-sealing period of the plastic film at an irregular speed. Further, the present invention relates to a plastic film heat sealing device in which the sealing time of the plastic film is arbitrarily adjusted.

従来技術の構成とその問題点 プラスチックフイルムによってプラスチック袋を製造
するとき、可動シールバーと固定シールバーを有するプ
ラスチックフイルムヒートシール装置が一般に使用され
ている。たとえば、実公昭58−52174号公報に記載され
ている装置がそれである。同公報に記載されている装置
では、可動シールバーと固定シールバーが互いに対向
し、２枚のプラスチックフイルムが互いに重ね合わさ
れ、可動シールバーと固定シールバー間に送られる。さ
らに、揺動レバー、連結リンク、連結ロッドなどの伝動
連結部材によって可動シールバーと回転駆動部材が伝動
連結され、駆動モータによって回転駆動部材が駆動さ
れ、回転する。これによって可動シールバーが動作し、
可動シールバーが固定シールバーに対し往復移動し、プ
ラスチックフイルムが可動シールバーと固定シールバー
間に挟み付けられ、可動シールバーおよび固定シールバ
ーによってプラスチックフイルムが加熱され、ヒートシ
ールされる。2. Description of the Related Art Structure and Problems of the Related Art When manufacturing a plastic bag by using a plastic film, a plastic film heat sealing device having a movable seal bar and a fixed seal bar is generally used. For example, the apparatus described in Japanese Utility Model Publication No. 58-52174 is the apparatus. In the device described in the publication, a movable seal bar and a fixed seal bar face each other, two plastic films are superimposed on each other, and fed between the movable seal bar and the fixed seal bar. Further, the movable seal bar and the rotation drive member are operatively connected by a transmission connection member such as a swing lever, a connection link, and a connection rod, and the rotation drive member is driven and rotated by the drive motor. This activates the movable seal bar,
The movable seal bar reciprocates with respect to the fixed seal bar, the plastic film is sandwiched between the movable seal bar and the fixed seal bar, and the plastic film is heated and heat-sealed by the movable seal bar and the fixed seal bar.

ところで、この装置において、これまで、回転駆動部
材の駆動モータとして普通の三相モータを使用し、制御
機構によってこれを等速駆動していた。このため、従来
はプラスチックフイルムのシール時間にともなう問題が
あった。By the way, in this device, an ordinary three-phase motor has been used as a drive motor of the rotary drive member, and is driven at a constant speed by a control mechanism. For this reason, there has conventionally been a problem associated with the sealing time of the plastic film.

シール時間とは、可動シールバーおよび固定シールバ
ーによってプラスチックフイルムが加熱され、ヒートシ
ールされる時間であり、プラスチックフイルムが可動シ
ールバーと固定シールバー間に挟み付けられている時間
のことである。そして、それに関係するのは可動シール
バーの移動速度であり、駆動モータおよび回転駆動部材
の駆動速度である。駆動モータの駆動速度および可動シ
ールバーの移動速度が低いほど、プラスチックフイルム
のシール時間が長く、駆動モータの駆動速度および可動
シールバーの移動速度が高いほど、プラスチックフイル
ムのシール時間は短い。そして、厚いプラスチックフイ
ルムの場合、プラスチックフイルムを長いシール時間に
わたってヒートシールする必要がある。したがって、駆
動モータを低速度で駆動し、可動シールバーを低速度で
移動させることが好ましい。反対に、薄いプラスチック
フイルムの場合、プラスチックフイルムを短いシール時
間をもってヒートシールすることが好ましく、駆動モー
タを高速度で駆動することが好ましい。The sealing time is a time during which the plastic film is heated and heat-sealed by the movable seal bar and the fixed seal bar, and is a time during which the plastic film is sandwiched between the movable seal bar and the fixed seal bar. What is related to this is the moving speed of the movable seal bar and the driving speed of the drive motor and the rotary drive member. The lower the driving speed of the driving motor and the moving speed of the movable seal bar, the longer the sealing time of the plastic film. The higher the driving speed of the driving motor and the moving speed of the movable seal bar, the shorter the sealing time of the plastic film. In the case of a thick plastic film, it is necessary to heat seal the plastic film for a long sealing time. Therefore, it is preferable to drive the drive motor at a low speed and move the movable seal bar at a low speed. Conversely, in the case of a thin plastic film, it is preferable to heat seal the plastic film with a short sealing time, and it is preferable to drive the drive motor at a high speed.

しかしながら、駆動モータの駆動速度および可動シー
ルバーの移動速度については、可動シールバーの移動サ
イクルもそれに関係する。駆動モータの駆動速度および
可動シールバーの移動速度が低いほど、可動シールバー
の移動サイクルが長く、駆動モータの駆動速度および可
動シールバーの移動速度が高いほど、可動シールバーの
移動サイクルは短い。そして、小さいプラスチック袋を
製造するには、プラスチックフイルムの送り量を小さく
し、可動シールバーの移動サイクルを短くする必要があ
る。このため、厚いプラスチックフイルムであっても、
駆動モータを高速度で駆動せねばならず、プラスチック
フイルムのシール時間が短く、これを的確にヒートシー
ルすることができないという問題があったものである。
反対に、大きいプラスチック袋を製造するには、プラス
チックフイルムの送り量を大きくし、可動シールバーの
移動サイクルを長くする必要があり、薄いプラスチック
フイルムであっても、駆動モータを低速度で駆動せねば
ならず、プラスチックフイルムのシール時間が長く、こ
れを的確にヒートシールすることができないという問題
もある。However, regarding the driving speed of the drive motor and the moving speed of the movable seal bar, the moving cycle of the movable seal bar is also related thereto. The lower the driving speed of the driving motor and the moving speed of the movable seal bar, the longer the moving cycle of the movable seal bar. The higher the driving speed of the driving motor and the moving speed of the movable seal bar, the shorter the moving cycle of the movable seal bar. In order to manufacture a small plastic bag, it is necessary to reduce the feed amount of the plastic film and shorten the moving cycle of the movable seal bar. For this reason, even for thick plastic films,
The drive motor must be driven at a high speed, and the sealing time of the plastic film is short, so that there is a problem that it cannot be heat-sealed accurately.
Conversely, in order to manufacture large plastic bags, it is necessary to increase the feed rate of the plastic film and lengthen the moving cycle of the movable seal bar. In addition, there is a problem that the sealing time of the plastic film is long, and it cannot be heat-sealed accurately.

発明の目的 したがって、この発明は、駆動モータによって回転駆
動部材を回転させ、これによって可動シールバーを往復
移動させるプラスチックフイルムヒートシール装置にお
いて、前記従来の問題を解決し、可動シールバーの移動
サイクルに関係なく、送り期間およびヒートシール期間
を不等速制御し、プラスチックフイルムのシール時間を
任意に調整することができるようにすべくなされたもの
である。SUMMARY OF THE INVENTION Accordingly, the present invention solves the above-mentioned conventional problems in a plastic film heat sealing apparatus in which a rotary drive member is rotated by a drive motor to thereby reciprocate a movable seal bar. Regardless, the feeding period and the heat sealing period are controlled at irregular speeds so that the sealing time of the plastic film can be arbitrarily adjusted.

発明の構成 この発明によれば、従来の三相モータに代えて、回転
駆動機構の駆動モータとしてサーボモータが使用され
る。そして、制御機構によってサーボモータが不等速連
続駆動され、サーボモータは所定の持続時間をもって高
速度で駆動され、所定の持続時間をもって低速度で駆動
される。これによってプラスチックフィルムのシール時
間が調整される。According to the present invention, a servomotor is used as a drive motor of a rotary drive mechanism instead of a conventional three-phase motor. Then, the servomotor is continuously driven at an irregular speed by the control mechanism, and the servomotor is driven at a high speed for a predetermined duration and at a low speed for a predetermined duration. Thereby, the sealing time of the plastic film is adjusted.

実施例の説明 以下、この発明の実施例を説明する。Description of Embodiments Hereinafter, embodiments of the present invention will be described.

第１図において、この装置は実公昭58−52174号公報
の装置と同一の構造のものである。可動シールバー（M.
S）と固定シールバー（F.S）が互いに対向し、可動シー
ルバー（M.S）は揺動レバー（１）に伝動連結され、揺
動レバー（１）は支軸（２）に支持されている。さら
に、揺動体（３），（４）が支軸（５）に支持され、連
結リンク（６）によって揺動レバー（１）と揺動体
（３）が伝動連結され、連結ロッド（７）によって揺動
体（４）と回転駆動部材（８）が伝動連結されている。
回転駆動部材（８）は回転駆動輪からなり、駆動軸
（９）を有し、駆動モータ（10）に伝動連結されてい
る。連結ロッド（７）は回転駆動部材（８）の偏心位置
に伝動連結されている。この他、揺動アーム（11）が揺
動体（３）に取り付けられ、ロックピン（12）が揺動ア
ーム（11）に設けられ、エアシリンダ（13）がこれに伝
動連結されている。さらに、凹部（14）が揺動体（４）
に形成されており、エアシリンダ（13）によって揺動ア
ーム（11）を揺動させ、ロックピン（12）を凹部（14）
に嵌め込み、ロックピン（12）によって揺動体（３），
（４）をロックすることができる。In FIG. 1, this device has the same structure as the device disclosed in Japanese Utility Model Publication No. 58-52174. Movable seal bar (M.
The movable seal bar (MS) is operatively connected to the swing lever (1), and the swing lever (1) is supported by the support shaft (2). Further, the rocking bodies (3) and (4) are supported by a support shaft (5), and the rocking lever (1) and the rocking body (3) are operatively connected by a connecting link (6), and are connected by a connecting rod (7). The oscillating body (4) and the rotary drive member (8) are operatively connected.
The rotary drive member (8) is composed of rotary drive wheels, has a drive shaft (9), and is operatively connected to a drive motor (10). The connecting rod (7) is operatively connected to the eccentric position of the rotary drive member (8). In addition, a swing arm (11) is mounted on the swing body (3), a lock pin (12) is provided on the swing arm (11), and an air cylinder (13) is operatively connected thereto. Further, the concave portion (14) is provided with the oscillator (4).
The swing arm (11) is swung by the air cylinder (13), and the lock pin (12) is recessed (14).
The rocking body (3),
(4) can be locked.

第１図に示すこの装置によれば、２枚のプラスチック
フイルムは、互いに重ね合わされた状態において、フイ
ルム送り用サーボモータ（Ｍ）によって、前記可動シー
ルバー（M.S）と固定シールバー（F.S）間に形成される
プラスチックフイルム搬送ライン（C.L）に沿って間欠
部に搬送される。前記フイルム送り用サーボモータ
（Ｍ）は、制御機構（15）によって、不等速連続駆動す
るよう制御されている。この場合、プラスチックフイル
ムは、フイルム送り用サーボモータ（Ｍ）の制御駆動に
より、フイルムの送り期間中、第２図に示すように、速
度（V0）で搬送される。さらに、この装置では、駆動モ
ータ（10）によって回転駆動部材（８）を駆動し、回転
させると、連結ロッド（７）によって揺動体（３），
（４）を揺動させ、連結リンク（６）によって揺動レバ
ー（１）を揺動させることができる。したがって、揺動
レバー（１）によって可動シールバー（M.S）を動作さ
せ、これを固定シールバー（F.S）に対し往復移動させ
ることができ、プラスチックフイルムを可動シールバー
（M.S）と固定シールバー（F.S）間に挟み付け、可動シ
ールバー（M.S）および固定シールバー（F.S）によって
プラスチックフイルムをヒートシールすることができ
る。したがって、プラスチックフイルムによってプラス
チック袋を製造することができる。According to the apparatus shown in FIG. 1, two plastic films are superposed on each other by a film feed servomotor (M) between the movable seal bar (MS) and the fixed seal bar (FS). Is transported to the intermittent section along the plastic film transport line (CL) formed at the center. The film feed servomotor (M) is controlled by a control mechanism (15) so as to be continuously driven at an irregular speed. In this case, the plastic film is conveyed at a speed (V 0 ) as shown in FIG. 2 during the film feeding period by the control driving of the film feeding servo motor (M). Further, in this device, when the rotary drive member (8) is driven by the drive motor (10) and is rotated, the rocking body (3),
By swinging (4), the swing lever (1) can be swung by the connecting link (6). Therefore, the movable seal bar (MS) can be operated by the swing lever (1) and reciprocated with respect to the fixed seal bar (FS), and the plastic film can be moved between the movable seal bar (MS) and the fixed seal bar (MS). FS), and the plastic film can be heat-sealed by the movable seal bar (MS) and the fixed seal bar (FS). Therefore, a plastic bag can be manufactured using a plastic film.

さらに、エアシリンダ（13）によって揺動アーム（1
1）を揺動させ、ロックピン（12）を凹部（14）から離
脱させ、揺動体（３），（４）のロックを解除すること
もできる。したがって、その後、回転駆動部材（８）お
よび連結ロッド（７）によって揺動体（４）が駆動さ
れ、揺動しても、揺動体（３）は揺動しない。したがっ
て、回転駆動部材（８）を駆動したまま可動シールバー
（M.S）および固定シールバー（F.S）を調整することが
できる。回転駆動部材（８）を無負荷駆動することもで
きる。In addition, the swing arm (1
By swinging 1), the lock pin (12) is disengaged from the concave portion (14), and the rockers (3) and (4) can be unlocked. Therefore, after that, the rocking body (4) is driven by the rotation drive member (8) and the connecting rod (7), and even if rocking, the rocking body (3) does not rock. Therefore, the movable seal bar (MS) and the fixed seal bar (FS) can be adjusted while the rotation drive member (8) is driven. The rotation driving member (8) can be driven without load.

さらに、この装置の場合、従来の三相モータに代え
て、回転駆動部材（８）の駆動モータ（10）としてサー
ボモータが使用されている。普通の三相モータと異な
り、サーボモータは不等速連続駆動することができるの
は周知のとおりである。そして、これが制御機構（15）
に接続されており、制御機構（15）によって駆動モータ
（10）が不等速連続駆動される。したがって、制御機構
（15）によって送り期間およびヒートシール期間を不等
速制御し、プラスチックフイルムのシール時間を調整す
ることができる。Further, in the case of this device, a servomotor is used as the drive motor (10) of the rotary drive member (8) instead of the conventional three-phase motor. It is well known that unlike ordinary three-phase motors, servo motors can be driven at irregular speeds continuously. And this is the control mechanism (15)
The drive motor (10) is continuously driven at an irregular speed by the control mechanism (15). Therefore, the feeding period and the heat sealing period can be unequally controlled by the control mechanism (15) to adjust the sealing time of the plastic film.

第２図はその特性を示す。この実施例では、可動シー
ルバー（M.S）は上下方向に往復移動し、上昇および下
降する。そして、駆動モータ（10）によって回転駆動部
材（８）が駆動され、回転し、プラスチックフイルムの
ヒートシール後、可動シールバー（M.S）が固定シール
バー（F.S）から離れ、上昇する。可動シールバー（M.
S）は位置（P0）まで上昇する。そして、可動シールバ
ー（M.S）が固定シールバー（F.S）から上昇したとき、
コンベヤによってプラスチックフイルムが送られる。そ
の送り速度は設定値（V0）まで上昇する。その後、可動
シールバー（M.S）が固定シールバー（F.S）に向かって
下降し、コンベヤおよびプラスチックフイルムが停止す
る。したがって、プラスチックフイルムが可動シールバ
ー（M.S）と固定シールバー（F.S）間に挟み付けられ、
可動シールバー（M.S）および固定シールバー（F.S）に
よってプラスチックフイルムがヒートシールされる。FIG. 2 shows the characteristics. In this embodiment, the movable seal bar (MS) reciprocates up and down and moves up and down. Then, the rotary drive member (8) is driven by the drive motor (10) to rotate, and after the plastic film is heat-sealed, the movable seal bar (MS) separates from the fixed seal bar (FS) and rises. Movable seal bar (M.
S) rises to the position (P 0 ). And when the movable seal bar (MS) rises from the fixed seal bar (FS),
The plastic film is fed by the conveyor. The feed speed increases to the set value (V 0 ). Thereafter, the movable seal bar (MS) descends toward the fixed seal bar (FS), and the conveyor and the plastic film stop. Therefore, the plastic film is sandwiched between the movable seal bar (MS) and the fixed seal bar (FS),
The plastic film is heat-sealed by the movable seal bar (MS) and the fixed seal bar (FS).

この装置において、小さいプラスチック袋を製造する
には、プラスチックフイルムの送り時間（T1）を短く
し、その送り量を小さくする必要がある。これにともな
い、可動シールバー（M.S）の移動サイクル時間（T2）
を短くする必要がある。そして、厚いプラスチックフイ
ルムを使用し、これを的確にヒートシールするには、プ
ラスチックフイルムのシール時間（T3）を長くする必要
がある。これを達成するには、制御機構（15）によって
駆動モータ（10）を不等速連続駆動し、可動シールバー
（M.S）が固定シールバー（F.S）から上昇するとき、駆
動モータ（10）および回転駆動部材（８）を高速度で駆
動し、その駆動速度を所定値（V2）まで上昇させればよ
い。駆動速度を所定値（V2）まで上昇させると、それに
ともない、可動シールバー（M.S）を高速度で移動させ
ることができ、その移動サイクル時間（T2）が短く、小
さいプラスチック袋を製造することができる。そして、
可動シールバー（M.S）が固定シールバー（F.S）に向か
って下降するとき、駆動モータ（10）および回転駆動部
材（８）を低速度で駆動し、その駆動速度を所定値
（V1）まで下降させると、それにともない、可動シール
バー（M.S）が低速度で駆動し、プラスチックフイルム
が長いシール時間（T3）にわたってヒートシールされ
る。したがって、厚いプラスチックフイルムであって
も、そのシール時間（T3）が長く、これを的確にヒート
シールすることができる。In this apparatus, in order to manufacture a small plastic bag, it is necessary to shorten the feed time (T 1 ) of the plastic film and to reduce the feed amount. Accordingly, the moving cycle time (T 2 ) of the movable seal bar (MS)
Need to be shorter. Then, in order to use a thick plastic film and heat seal it properly, it is necessary to lengthen the sealing time (T 3 ) of the plastic film. To achieve this, the drive motor (10) is driven unequally continuously by the control mechanism (15), and when the movable seal bar (MS) rises from the fixed seal bar (FS), the drive motor (10) and What is necessary is just to drive the rotary drive member (8) at a high speed and increase the drive speed to a predetermined value (V 2 ). When the driving speed is increased to a predetermined value (V 2 ), the movable seal bar (MS) can be moved at a high speed, and the moving cycle time (T 2 ) is short, thereby producing a small plastic bag. be able to. And
When the movable seal bar (MS) descends toward the fixed seal bar (FS), the drive motor (10) and the rotary drive member (8) are driven at a low speed, and the drive speed is increased to a predetermined value (V 1 ). Upon lowering, the movable seal bar (MS) is driven at a low speed, and the plastic film is heat-sealed for a long sealing time (T 3 ). Therefore, even for a thick plastic film, the sealing time (T 3 ) is long, and this can be heat-sealed accurately.

反対に、大きいプラスチック袋を製造するには、プラ
スチックフイルムの送り量を大きくし、可動シールバー
（M.S）の移動サイクル時間（T2）を長くする必要があ
る。そして、薄いプラスチックフイルムを使用し、これ
を的確にヒートシールするには、プラスチックフイルム
のシール時間（T3）を短くする必要がある。この場合、
可動シールバー（M.S）が位置（P0）に上昇するとき、
駆動モータ（10）および回転駆動部材（８）を低速度で
駆動し、その駆動速度を所定値まで低下させると、可動
シールバー（M.S）を低速度で移動させることができ、
その移動サイクル時間が長く、大きいプラスチック袋を
製造することができる。そして、可動シールバー（M.
S）が固定シールバー（F.S）に向かって下降するとき、
駆動モータ（10）および回転駆動部材（８）を高速度で
駆動し、その駆動速度を所定値まで上昇させると、可動
シールバー（M.S）を高速度で移動させ、プラスチック
フイルムを短いシール時間をもってヒートシールするこ
とができる。したがって、薄いプラスチックフイルムで
あっても、そのシール時間が短く、これを的確にヒート
シールすることができる。Conversely, in order to produce a large plastic bag, it is necessary to increase the feed amount of the plastic film and to increase the moving cycle time (T 2 ) of the movable seal bar (MS). Then, in order to use a thin plastic film and accurately heat seal it, it is necessary to shorten the sealing time (T 3 ) of the plastic film. in this case,
When the movable seal bar (MS) rises to the position (P 0 ),
When the drive motor (10) and the rotary drive member (8) are driven at a low speed and the drive speed is reduced to a predetermined value, the movable seal bar (MS) can be moved at a low speed,
Its transfer cycle time is long and large plastic bags can be manufactured. And the movable seal bar (M.
When S) descends towards the stationary seal bar (FS),
When the driving motor (10) and the rotary driving member (8) are driven at a high speed and the driving speed is increased to a predetermined value, the movable seal bar (MS) is moved at a high speed, and the plastic film is moved with a short sealing time. Can be heat sealed. Therefore, even for a thin plastic film, the sealing time is short, and it can be heat-sealed accurately.

発明の効果 以上説明したように、この発明によれば、制御機構
（15）によって駆動モータ（10）が不等速連続駆動さ
れ、駆動モータ（10）は所定の持続時間をもって高速度
（V2）で駆動され、所定の持続時間をもって低速度（V
1）で駆動される。これによってプラスチックフィルム
のシール時間が調整される。この結果、可動シールバー
（M.S）の移動サイクルに関係なく、プラスチックフイ
ルムの送り時間およびヒートシール期間を不等速制御
し、プラスチックフイルムのシール時間を任意に調整す
ることができる。したがって、可動シールバー（M.S）
の移動サイクル時間を短くし、小さいプラスチック袋を
製造するにあたって、厚いプラスチックフイルムを使用
するとき、プラスチックフイルムを長いシール時間にわ
たってヒートシールすることができる。したがって、厚
いプラスチックフイルムであっても、そのシール時間が
長く、これを的確にヒートシールすることができる。反
対に、可動シールバー（M.S）の移動サイクルを長く
し、大きいプラスチック袋を製造するにあたって、薄い
プラスチックフイルムを使用するとき、プラスチックフ
イルムを短いシール時間をもってヒートシールすること
もできる。したがって、薄いプラスチックフイルムであ
っても、そのシール時間が短く、これを的確にヒートシ
ールすることができ、所期の目的を達成することができ
るものである。Effect of the Invention As described above, according to the present invention, the drive motor (10) is continuously driven at an irregular speed by the control mechanism (15), and the drive motor (10) is driven at a high speed (V2) with a predetermined duration. At a low speed (V
Driven by 1). Thereby, the sealing time of the plastic film is adjusted. As a result, regardless of the moving cycle of the movable seal bar (MS), the feeding time and the heat sealing period of the plastic film can be unequally controlled, and the sealing time of the plastic film can be arbitrarily adjusted. Therefore, the movable seal bar (MS)
When a thick plastic film is used in manufacturing a small plastic bag by shortening the transfer cycle time, the plastic film can be heat-sealed for a long sealing time. Therefore, even for a thick plastic film, the sealing time is long, and this can be accurately heat-sealed. Conversely, when the moving cycle of the movable seal bar (MS) is lengthened and a thin plastic film is used in manufacturing a large plastic bag, the plastic film can be heat-sealed with a short sealing time. Therefore, even if it is a thin plastic film, the sealing time is short, the heat sealing can be accurately performed, and the intended purpose can be achieved.

【図面の簡単な説明】[Brief description of the drawings]

第１図はこの発明の実施例を示す説明図、第２図は第１
図の装置の特性を示すグラフである。 （８）……回転駆動部材 （10）……駆動モータ （15）……制御機構FIG. 1 is an explanatory view showing an embodiment of the present invention, and FIG.
4 is a graph showing characteristics of the device shown in FIG. (8) Rotary drive member (10) Drive motor (15) Control mechanism

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B29C 65/02 - 65/78 B65B 51/10 B31B 1/64 - 1/66 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) B29C 65/02-65/78 B65B 51/10 B31B 1/64-1/66

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】可動シールバー（M.S）と固定シールバー
（F.S）を互いに対向させ、前記可動シールバーを回転
駆動部材（８）に伝動連結するとともに、重ね合わせた
２枚のプラスチックフィルムを前記可動シールバーと固
定シールバー間に送り、駆動モータ（10）によって前記
回転駆動部材を回転させ、これによって前記可動シール
バーを動作させ、前記可動シールバーを前記固定シール
バーに対し往復移動させ、前記プラスチックフィルムを
前記可動シールバーと固定シールバー間に挟み付けるよ
うにした装置において、前記駆動モータとしてサーボモ
ータを使用し、前記サーボモータを所定の持続時間をも
って高速度（V2）で駆動し、所定の持続時間をもって低
速度（V1）で駆動し、これによって前記サーボモータを
不等速連続駆動する制御機構を設け、前記制御機構によ
って前記プラスチックフィルムのシール時間を調整する
ようにしたことを特徴とするプラスチックフィルムヒー
トシール装置。1. A movable seal bar (MS) and a fixed seal bar (FS) are opposed to each other, and the movable seal bar is operatively connected to a rotary drive member (8). Feeding between a movable seal bar and a fixed seal bar, rotating the rotary driving member by a drive motor (10), thereby operating the movable seal bar, and reciprocating the movable seal bar with respect to the fixed seal bar; In an apparatus in which the plastic film is sandwiched between the movable seal bar and the fixed seal bar, a servomotor is used as the drive motor, and the servomotor is driven at a high speed (V2) for a predetermined duration. A controller that drives at a low speed (V1) with a predetermined duration, thereby continuously driving the servomotor at an unequal speed A plastic film heat-sealing apparatus, wherein a sealing time of the plastic film is adjusted by the control mechanism.
JP1342570A 1989-12-27 1989-12-27 Plastic film heat sealing device Expired - Lifetime JP2952602B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1342570A JP2952602B2 (en) 1989-12-27 1989-12-27 Plastic film heat sealing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1342570A JP2952602B2 (en) 1989-12-27 1989-12-27 Plastic film heat sealing device

Publications (2)

Publication Number Publication Date
JPH03197119A JPH03197119A (en) 1991-08-28
JP2952602B2 true JP2952602B2 (en) 1999-09-27

Family

ID=18354790

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1342570A Expired - Lifetime JP2952602B2 (en) 1989-12-27 1989-12-27 Plastic film heat sealing device

Country Status (1)

Country Link
JP (1) JP2952602B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69224460T2 (en) * 1991-10-09 1998-06-10 Totani Giken Kogyo Kk Device for hot welding two superimposed plastic films
JP2001171607A (en) * 1999-12-21 2001-06-26 Dengen Automation Kk Packaging apparatus
JP5612937B2 (en) * 2010-07-13 2014-10-22 デュプロ精工株式会社 Sealing device
JP6380594B1 (en) * 2017-03-31 2018-08-29 富士電機株式会社 Control device, intermittent packaging machine and control method of intermittent packaging machine

Also Published As

Publication number Publication date
JPH03197119A (en) 1991-08-28

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