JP2023161925A - Horizontal sealing device in horizontal bag making and filling machine - Google Patents

Abstract

To provide a horizontal sealing device for a horizontal bag making and filling machine that can perform synchronized positioning well during a set operation for synchronized positioning, the horizontal sealing device causing a pair of seal bodies to be rotationally driven by separate drive motors.SOLUTION: In a horizontal sealing device of a horizontal bag making and filling machine of the invention, with respect to first support members 22a, 22b for supporting a first rotation shaft 21 of a horn 17, second support members 24a, 24b for supporting a second rotation shaft 23 of an anvil 18 are urged toward the first support members 22a, 22b by an air cylinder 38. When a request signal for synchronous set operation of a first driving motor 29 rotating around a first rotary shaft 21 and a second driving motor 32 rotating around a second rotary shaft 23 is outputted, the urging of the air cylinder 38 is released, and the mutual interval between the horn 17 and the anvil 18 is expanded. When the synchronous set operation is completed, the mutual interval between the horn 17 and the anvil 18 is made close by the urging of the air cylinder 38.SELECTED DRAWING: Figure 1

Description

本発明は、横形製袋充填機において、相互に反対方向に回転する一対のシール体によって筒状包装材に横シールを施す横シール装置に関する。 The present invention relates to a horizontal sealing device for horizontally sealing a cylindrical packaging material using a pair of sealing bodies that rotate in opposite directions in a horizontal bag-forming-filling machine.

横形製袋充填機などの包装機では、原反ロールから引き出されて製袋手段で案内されるフィルム(包装材)は、幅方向の両端縁部が合掌状に重合されて筒状に成形され、その重合部にフィルムの搬送方向に向けた縦シールを施すと共に、筒状フィルム中へ供給された各物品の前後位置において搬送方向と交差する横シールを施してピロー包装品を得ている。包装機において筒状フィルムに横シールを施す横シール装置として、筒状フィルムの搬送路を挟んで一対のシール体が対向配置され、該一対のシール体を別々の駆動モータによって相互に反対方向に回転することで、両シール体のシール面が相対向して噛み合う際に筒状フィルムを挟持して横シールを施すよう構成された横シール装置が、特許文献１として提案されている。 In packaging machines such as horizontal bag-forming-filling machines, the film (packaging material) that is pulled out from a roll of material and guided by a bag-forming means is formed into a cylindrical shape with both edges in the width direction overlapped in a clasped shape. A pillow-packed product is obtained by applying a vertical seal facing the film transport direction to the overlapping portion, and applying horizontal seals crossing the transport direction at the front and rear positions of each article fed into the cylindrical film. As a horizontal sealing device for horizontally sealing a cylindrical film in a packaging machine, a pair of sealing bodies are arranged facing each other across the conveyance path of the cylindrical film, and the pair of sealing bodies are moved in opposite directions by separate drive motors. Patent Document 1 proposes a horizontal sealing device configured to perform horizontal sealing by sandwiching a cylindrical film when the seal surfaces of both seal bodies face each other and engage with each other by rotation.

特許文献１の横シール装置では、シール体のシール面に付着したフィルムの溶融カスや、シール体に物品が噛み込んだ時に付着した物品のカスなどを取り去るために、メンテナンスモード設定時のスイッチング操作による出力信号に基づいて制御手段は、シール体が停止した運転停止状態から、清掃時に両シール体同士が互いに邪魔にならず、ワイヤーブラシを両シール体のシール面に当て易く清掃し易い位置となるシール面の向きで停止するよう、両シール体を回転して停止するように、夫々の駆動モータを駆動制御している。 In the horizontal sealing device of Patent Document 1, in order to remove the molten residue of the film attached to the sealing surface of the sealing body, the scum of the article attached when the article is caught in the sealing body, the switching operation is performed when setting the maintenance mode. Based on the output signal, the control means moves from the stopped state where the seal bodies are stopped to a position where both seal bodies do not interfere with each other during cleaning and where the wire brush can be easily applied to the seal surfaces of both seal bodies and cleaning is easy. The drive motors of the respective drive motors are controlled so that both seal bodies are rotated and stopped so that the seal faces are oriented as shown in FIG.

特許第５２８２１１１号公報Patent No. 5282111

特許文献１に開示の横シール装置のように、一対のシール体を別々の駆動モータで回転する構成において、何らかの要因によって回転位置の同期状態が崩れた場合には、同期位置合わせを行うためのセット運転が必要になる。このセット運転の際に、シール体が相互に非同期のまま噛合してしまうと、シール面に形成されたシール目が正しい噛合関係とはならずに、シール目形成部が損傷するなどの不具合が発生することがある。 In a configuration in which a pair of seal bodies are rotated by separate drive motors, such as the horizontal seal device disclosed in Patent Document 1, if the synchronization of the rotational positions is disrupted for some reason, there is a Set operation is required. During this set operation, if the seal bodies mesh with each other asynchronously, the seals formed on the seal surface will not be in the correct meshing relationship, resulting in problems such as damage to the seals forming part. This may occur.

本発明の目的は、一対のシール体を別々の駆動モータにより回転駆動する横シール装置において、シール体の同期セット運転を良好に行うことができる横形製袋充填機における横シール装置を提供することを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide a horizontal sealing device for a horizontal bag-forming-filling machine in which a pair of sealing bodies are rotationally driven by separate drive motors, and in which the synchronized set operation of the sealing bodies can be performed satisfactorily. With the goal.

本願の請求項１に係る発明の横形製袋充填機における横シール装置は、
筒状包装材(10)の搬送路を挟んで相互に反対方向に回転する一対のシール体(17,18)によって、筒状包装材(10)中に供給された物品(11)を挟む前後で挟持して筒状包装材(10)の搬送方向と交差する方向へ横シールを施す横形製袋充填機における横シール装置において、
一方のシール体(17)が配設された第１回転軸(21)を回転する第１駆動モータ(29)と、
他方のシール体(18)が配設された第２回転軸(23)を回転する第２駆動モータ(32)と、
前記第１回転軸(21)および第２回転軸(23)の一方を他方に付勢して両回転軸(21,23)を接近し、付勢解除により両回転軸(21,23)を離間する付勢手段(26)と、
前記第１駆動モータ(29)と第２駆動モータ(32)との同期セット運転の要求信号を受けて、前記付勢手段(26)に付勢解除信号を出力して、前記第１回転軸(21)と第２回転軸(23)とを離間することで一対のシール体(17,18)の相互間隔を拡げ、前記同期セット運転の完了により前記付勢手段(26)に付勢信号を出力して、一対のシール体(17,18)で筒状包装材(10)を挟持して横シールを施すことが可能なシール体(17,18)の相互間隔となるよう、前記第１回転軸(21)と第２回転軸(23)とを接近させる制御手段(40)と、を備えたことを特徴とする。
請求項１に係る発明によれば、第１および第２駆動モータの同期セット運転を行う信号により、一対のシール体の相互間隔が拡がるので、同期セット運転でシール体が異なる回転方向や、位相が異なる回転を行っても、シール体におけるシール面に形成されたシール目同士が正しい噛合状態とは異なって噛み合ってしまうことはなく、シール面のシール目が目潰れするなど、損傷してしまうのを防ぐことができる。また、同期セット運転中にシール体が噛合位置を通過するよう回転した場合でも、搬送停止中の筒状包装材をシール体で挟持して搬送上流へ押し戻したり、あるいは搬送下流へ引っ張って包装材を引き千切ってしまったりするようなことがない。更には、セット運転時に回転するシール体が筒状包装材に供給されている物品に間接的に接触するなどして、筒状包装材中の物品の位置がずれてしまう不具合も防止できる。 The horizontal sealing device in the horizontal bag-forming-filling machine of the invention according to claim 1 of the present application is as follows:
Before and after the article (11) fed into the cylindrical packaging material (10) is sandwiched between a pair of seal bodies (17, 18) that rotate in opposite directions across the transport path of the cylindrical packaging material (10). In a horizontal sealing device in a horizontal bag-forming-filling machine that performs horizontal sealing in a direction intersecting the conveyance direction of a cylindrical packaging material (10) by sandwiching the material,
a first drive motor (29) that rotates a first rotating shaft (21) on which one seal body (17) is disposed;
a second drive motor (32) that rotates a second rotating shaft (23) on which the other seal body (18) is disposed;
One of the first rotating shaft (21) and the second rotating shaft (23) is biased toward the other to bring the rotating shafts (21, 23) closer together, and by releasing the bias, the rotating shafts (21, 23) are moved together. Spaced apart biasing means (26);
Upon receiving a request signal for synchronous set operation of the first drive motor (29) and the second drive motor (32), an energizing release signal is output to the energizing means (26), and the first rotating shaft is (21) and the second rotation shaft (23) to widen the mutual distance between the pair of seal bodies (17, 18), and upon completion of the synchronous set operation, a biasing signal is sent to the biasing means (26). is output, and the distance between the seal bodies (17, 18) is such that the cylindrical packaging material (10) can be sandwiched between the pair of seal bodies (17, 18) and horizontally sealed. It is characterized by comprising a control means (40) for bringing the first rotation shaft (21) and the second rotation shaft (23) closer together.
According to the invention according to claim 1, since the mutual interval between the pair of seal bodies is widened by the signal for performing the synchronous set operation of the first and second drive motors, the seal bodies are rotated in different rotation directions or phases during the synchronous set operation. Even if the seals are rotated differently, the seal eyes formed on the seal surface of the seal body will not mesh with each other in a different manner than the correct meshing state, and the seal eyes on the seal surface will be damaged, such as being crushed. can be prevented. In addition, even if the seal body rotates to pass through the meshing position during synchronous set operation, the cylindrical packaging material that is not being conveyed can be held by the seal body and pushed back upstream, or the packaging material can be pulled downstream. There is no chance of tearing it to pieces. Furthermore, it is possible to prevent a problem in which the rotating seal body indirectly contacts the articles being supplied to the cylindrical packaging material during the set operation, causing the articles in the cylindrical packaging material to be misaligned.

請求項２に係る発明では、前記第１回転軸(21)における一方のシール体(17)の両側の軸端側で、第１回転軸(21)を回転自在に支持する第１支持部材(22a,22b)と、
前記第２回転軸(23)における他方のシール体(18)の両側の軸端側で、第２回転軸(23)を回転自在に支持する第２支持部材(24a,24b)と、を備え、
前記付勢手段(26)は、前記第１支持部材(22a,22b)および第２支持部材(24a,24b)の一方を他方に付勢するよう構成したことを特徴とする。
請求項２の発明によれば、シール体の両側で回転軸を支持する支持部材同士を接近・離間移動することで、一対のシール体の姿勢を変化することなく接近・離間することができ、筒状包装材の挟持状態が変化して横シール不良を招くことがない。 In the invention according to claim 2, the first support member (21) rotatably supports the first rotation shaft (21) on both shaft end sides of one seal body (17) of the first rotation shaft (21). 22a, 22b) and
second support members (24a, 24b) rotatably supporting the second rotation shaft (23) on both shaft end sides of the other seal body (18) of the second rotation shaft (23); ,
The biasing means (26) is characterized in that it is configured to bias one of the first support member (22a, 22b) and the second support member (24a, 24b) toward the other.
According to the invention of claim 2, by moving the support members that support the rotating shaft on both sides of the seal bodies toward and away from each other, the pair of seal bodies can be moved toward and away from each other without changing the postures of the pair of seal bodies. There is no possibility that the clamping state of the cylindrical packaging material changes and causes a lateral seal failure.

請求項３に係る発明では、前記第１支持部材(22a,22b)の下方に、前記第２支持部材(24a,24b)が接近・離間移動可能に支持され、
該第２支持部材(24a,24b)の下方に配置したベース部材(15)に、第２支持部材(24a,24b)を第１支持部材(22a,22b)に付勢する前記付勢手段(26)を設けたことを特徴とする。
請求項３の発明によれば、横シール装置における下方の空所へ、付勢手段を収めるように配置することで、装置上方に有効利用可能な空間領域を確保することができる。 In the invention according to claim 3, the second support member (24a, 24b) is supported below the first support member (22a, 22b) so as to be movable toward and away from the first support member (22a, 22b),
The biasing means (24a, 24b) biasing the second support member (24a, 24b) toward the first support member (22a, 22b) is attached to the base member (15) disposed below the second support member (24a, 24b). 26).
According to the third aspect of the present invention, by arranging the biasing means so as to be housed in the lower space of the horizontal sealing device, it is possible to secure an effectively usable space above the device.

請求項４に係る発明では、一方のシール体(17)を振動発生手段(19)により超音波振動するホーン(17)とすると共に、他方のシール体(18)をアンビル(18)として構成し、
前記ホーン(17)とアンビル(18)とで挟持した前記筒状包装材(10)に超音波振動による横シールを施すよう構成したことを特徴とする。
請求項４の発明によれば、超音波振動によって筒状包装材を横シールするよう構成したので、シール体が高温とならず、筒状包装材を挟持するタイミングとの関係でシール体が停止する場合に、シール体が筒状包装材に接触しないようにする包装材のやけど防止対策を講じる必要がなくなり、付勢手段にエアシリンダを用いる場合は、その付勢ストロークが少ないコンパクトなシリンダを選定でき、装置の小型化を図ることができる。 In the invention according to claim 4, one seal body (17) is configured as a horn (17) that vibrates ultrasonically by the vibration generating means (19), and the other seal body (18) is configured as an anvil (18). ,
The present invention is characterized in that the cylindrical packaging material (10) held between the horn (17) and the anvil (18) is laterally sealed by ultrasonic vibration.
According to the invention of claim 4, since the cylindrical packaging material is laterally sealed by ultrasonic vibration, the sealing body does not become high temperature and the sealing body stops in relation to the timing of clamping the cylindrical packaging material. In this case, there is no need to take measures to prevent the seal from coming into contact with the cylindrical packaging material, and when using an air cylinder as the biasing means, it is recommended to use a compact cylinder with a short biasing stroke. can be selected, and the device can be made smaller.

本発明によれば、各シール体を回転する駆動モータの同期位置合わせのための同期セット運転に際し、シール体に設けられたシール目形成部などが損傷したり、筒状包装材中の物品の位置がずれたりするなどの不具合を起こすことなく、良好な同期位置合わせを実施することができる。 According to the present invention, during the synchronous set operation for synchronous positioning of the drive motors that rotate each seal body, the seal eye forming portion provided on the seal body, etc. may be damaged, and the articles in the cylindrical packaging material may be damaged. Good synchronized positioning can be performed without causing problems such as misalignment.

横シール装置の概略側面図である。FIG. 3 is a schematic side view of the lateral sealing device. 横シール装置の概略正面図であって、ホーンとアンビルとが接近している状態を示している。FIG. 3 is a schematic front view of the lateral sealing device, showing a state in which the horn and anvil are close to each other. 横シール装置の概略正面図であって、ホーンとアンビルとが離間している状態を示している。FIG. 2 is a schematic front view of the lateral sealing device, showing a state in which the horn and anvil are separated. 横シール装置の概略斜視図であって、一部の部材を透過して示している。It is a schematic perspective view of a horizontal sealing device, Comprising: Some members are shown transparently. 横シール装置の制御ブロック図である。It is a control block diagram of a horizontal sealing device.

次に、本発明に係る横形製袋充填機における横シール装置の好適な実施例を挙げて、添付図面を参照しながら以下説明する。 Next, a preferred embodiment of a horizontal sealing device in a horizontal bag-forming-filling machine according to the present invention will be described below with reference to the accompanying drawings.

横形製袋充填機(包装機)は、原反ロールから引き出した帯状フィルム(包装材)を、その長手方向両端縁部を合掌状に重合して筒状フィルム(筒状包装材)１０として成形する製袋手段と、筒状フィルム１０に向けて物品１１を所定間隔毎に供給する供給コンベヤと、前記合掌状に重合した筒状フィルム１０の重合部にフィルム搬送方向に向けた縦シールを施す縦シール装置と、前記筒状フィルム１０の重合部を挟持して縦シール装置に向けて筒状フィルム１０を搬送するフィルム搬送手段と、筒状フィルム１０中に所定間隔毎に供給された物品１１の前後位置で筒状フィルム１０を挟持し、フィルム搬送方向と交差する方向(幅方向)に横シール・切断を施す横シール装置と、の夫々を備える。横シール装置では、縦シール装置により重合部に縦シールが施された縦シール部が袋胴部に折り重なる状態で、筒状フィルム１０を横シール・切断する。また、包装機は、横シール装置のフィルム搬送方向の前後に、物品１１を、筒状フィルム１０を介して下側から支持して下流側に搬送する搬送コンベヤ１２と搬出コンベヤ１３とが設けられ、横シール・切断されて上流側の筒状フィルム１０から切り離された袋詰め製品(ピロー包装品)として搬出コンベヤ１３によって次工程に搬出するよう構成される。 A horizontal bag-forming-filling machine (packaging machine) forms a cylindrical film (cylindrical packaging material) 10 by polymerizing a band-shaped film (packaging material) pulled out from a roll of raw material into a cylindrical film (cylindrical packaging material) 10 by polymerizing both longitudinal edges of the film into a palm-shaped shape. a supply conveyor that supplies the articles 11 toward the tubular film 10 at predetermined intervals, and a vertical seal directed toward the film transport direction at the overlapping portion of the tubular film 10 that is overlapped in the shape of palms together. A vertical sealing device, a film conveying means for sandwiching the overlapping portion of the tubular film 10 and conveying the tubular film 10 toward the vertical sealing device, and articles 11 fed into the tubular film 10 at predetermined intervals. and a lateral sealing device that clamps the cylindrical film 10 at the front and back positions of the film and performs lateral sealing and cutting in a direction (width direction) intersecting the film transport direction. In the horizontal sealing device, the cylindrical film 10 is horizontally sealed and cut in a state in which the vertical sealing portion, in which the overlapping portion is vertically sealed by the vertical sealing device, is folded over the bag body. Further, the packaging machine is provided with a conveyor 12 and a discharge conveyor 13, which support the article 11 from below via the cylindrical film 10 and convey it to the downstream side, before and after the horizontal sealing device in the film conveyance direction. The product is transversely sealed and cut, and then separated from the upstream cylindrical film 10 as a bagged product (pillow packaged product) and transported to the next process by a transport conveyor 13.

図１～図４に示す如く、前記横シール装置は、底枠１４に配設されたベース部材１５に、筒状フィルム１０の搬送路を挟んで相互に反対方向に回転する一対のシール体としてのホーン１７およびアンビル１８と、ホーン１７を超音波振動する振動発生手段１９と、を備えるシールユニット２０が配設される。該シールユニット２０は、ホーン１７において左右に延出する第１回転軸２１を回転自在に支持する一対の第１支持部材２２ａ,２２ｂと、アンビル１８の左右に延出する第２回転軸２３を回転自在に支持する一対の第２支持部材２４ａ,２４ｂと、を備え、前記第１回転軸２１と第２回転軸２３とを接近・離間可能に、ホーン１７およびアンビル１８の左右側方において対応する右側第１支持部材２２ａと右側第２支持部材２４ａと、左側第１支持部材２２ｂと左側第２支持部材２４ｂとが、対向配置される。本実施例では、搬送路を挟んで上側にホーン１７が配置されると共に、下側にアンビル１８が配置されて、第１支持部材２２ａ,２２ｂの下面(対向面)と第２支持部材２４ａ,２４ｂの上面(対向面)とが所定の間隔を隔てて対面するよう配設される。また、シールユニット２０は、ホーン１７およびアンビル１８の左右で対向する一方の支持部材２４ａ,２４ｂを、他方の支持部材２２ａ,２２ｂに対して接近・離間移動可能に支持するガイド手段２５と、該ガイド手段２５に移動可能に支持された一方の支持部材２４ａ,２４ｂを他方の支持部材２２ａ,２２ｂに向けて付勢するエアシリンダからなる付勢手段２６と、を備える。実施例では、ホーン(一方のシール体)１７を支持する第１支持部材２２ａ,２２ｂに対し、アンビル(他方のシール体)１８を支持する第２支持部材２４ａ,２４ｂをガイドシャフト３６からなるガイド手段２５に沿うよう移動可能に支持して、第２支持部材２４ａ,２４ｂを第１支持部材２２ａ,２２ｂに接近・離間移動可能に構成すると共に、付勢手段２６によって第２支持部材２４ａ,２４ｂを第１支持部材２２ａ,２２ｂに向けて付勢するよう構成される。 As shown in FIGS. 1 to 4, the horizontal sealing device includes a pair of sealing bodies that are mounted on a base member 15 disposed on a bottom frame 14 and rotate in opposite directions with the transport path of the cylindrical film 10 interposed therebetween. A seal unit 20 is provided, which includes a horn 17 and an anvil 18, and a vibration generating means 19 for ultrasonically vibrating the horn 17. The seal unit 20 includes a pair of first support members 22a and 22b that rotatably support a first rotation shaft 21 extending left and right in the horn 17, and a second rotation shaft 23 extending left and right of the anvil 18. A pair of second support members 24a, 24b that rotatably support the horn 17 and the anvil 18 so that the first rotation shaft 21 and the second rotation shaft 23 can approach and separate from each other. The first right support member 22a and the second right support member 24a, and the first left support member 22b and the second left support member 24b are arranged to face each other. In this embodiment, the horn 17 is arranged on the upper side across the conveyance path, and the anvil 18 is arranged on the lower side. The upper surface (opposing surface) of 24b is arranged so as to face each other with a predetermined distance therebetween. The seal unit 20 also includes a guide means 25 that supports one support member 24a, 24b facing each other on the left and right sides of the horn 17 and anvil 18 so as to be movable toward and away from the other support member 22a, 22b. A biasing device 26 is provided, which is an air cylinder that biases one support member 24a, 24b movably supported by the guide device 25 toward the other support member 22a, 22b. In the embodiment, the first support members 22a, 22b that support the horn (one seal body) 17 are connected to the second support members 24a, 24b that support the anvil (the other seal body) 18 by a guide made of a guide shaft 36. The second support members 24a, 24b are movably supported along the means 25 so as to be movable toward and away from the first support members 22a, 22b. is configured to urge the first support members 22a, 22b toward the first support members 22a, 22b.

図２、図４に示す如く、前記シールユニット２０は、前記一対の第１支持部材２２ａ,２２ｂを連結する連結部材２７に配設されてベルト－プーリ伝達手段からなる第１連繋機構２８によって第１回転軸２１を駆動するサーボモータからなる第１駆動モータ２９と、前記一対の第２支持部材２４ａ,２４ｂが立設された支持ベース３０に配設されてベルト－プーリ伝達手段からなる第２連繋機構３１によって第２回転軸２３を駆動するサーボモータからなる第２駆動モータ３２と、を備え、両駆動モータ２９,３２によってホーン１７とアンビル１８とを、その回転位置と回転速度を同期して相互に反対方向に回転駆動する。また、連結部材２７に前記振動発生手段１９が支持されており、該振動発生手段１９は、超音波を発生するコンバータや、超音波を増幅するブースタなどを備え、ホーン１７を所定の振幅で超音波振動するよう構成され、前記フィルム搬送手段で搬送される筒状フィルム１０を、ホーン１７とアンビル１８とにより所定圧力で挟持して、超音波振動にて筒状フィルム１０の搬送方向と交差する幅方向に横シールを施すよう構成される。 As shown in FIGS. 2 and 4, the seal unit 20 is disposed on a connecting member 27 that connects the pair of first supporting members 22a and 22b, and is connected by a first connecting mechanism 28 consisting of a belt-pulley transmission means. A first drive motor 29 consisting of a servo motor that drives the one-rotation shaft 21, and a second drive motor 29 consisting of a belt-pulley transmission means arranged on a support base 30 on which the pair of second support members 24a, 24b are erected. A second drive motor 32 consisting of a servo motor drives the second rotating shaft 23 by a linkage mechanism 31, and the horn 17 and anvil 18 are synchronized in their rotational positions and rotational speeds by both drive motors 29 and 32. and rotate in opposite directions. Further, the vibration generating means 19 is supported by the connecting member 27, and the vibration generating means 19 is equipped with a converter that generates ultrasonic waves, a booster that amplifies the ultrasonic waves, etc. The cylindrical film 10, which is configured to sonic vibration and is transported by the film transporting means, is held between the horn 17 and the anvil 18 under a predetermined pressure, and the ultrasonic vibration crosses the transport direction of the cylindrical film 10. It is configured to apply a horizontal seal in the width direction.

図１～図４に示す如く、前記ホーン１７は、前記第１回転軸２１の軸端側において、前記連結部材２７で門型に連結された前記一対の第１支持部材２２ａ,２２ｂに軸受を介して回転自在に支持される。ホーン１７は、第１回転軸２１に所定角度毎に複数(実施例では１８０°間隔で２つ)のシールヘッド３３が放射状に設けられ、各シールヘッド３３の外周面には、外周面から回転軸側に凹む溝部を挟んでシールヘッド３３の回転方向となる前後幅方向に離間して一対のシール面が設けられる。前記アンビル１８は、前記第２回転軸２３の軸端側において、前記一対の第２支持部材２４ａ,２４ｂに軸受を介して回転自在に支持される。アンビル１８は、前記ホーン１７の各シールヘッド３３と対をなす各シールバー３４が、第２回転軸２３から所定角度毎に突出して設けられる。アンビル１８内には切断手段３５が配設され、シールバー３４の突出端には、切断手段３５を出没可能に貫通孔が形成される。各シールバー３４の貫通孔を挟む前後両側に、ホーン１７のシール面と対をなすシール面が筒状フィルム１０の幅方向に延びるように形成されている。そして、筒状フィルム１０中に所定間隔毎に供給された物品１１を挟む前後位置において、回転するホーン１７のシールヘッド３３とアンビル１８のシールバー３４とにより搬送中の筒状フィルム１０を挟持して、ホーン１７から発せられる超音波振動により、包装材のシーラントが溶融し、筒状フィルム１０の搬送方向と交差して、密封された横シール部が形成される。シールヘッド３３およびシールバー３４の各シール面には、横シールに際して所定のシール目を筒状フィルム１０の横シール部に形成するシール目形成部が設けられている。 As shown in FIGS. 1 to 4, the horn 17 is provided with bearings on the pair of first support members 22a and 22b connected in a gate shape by the connection member 27 on the shaft end side of the first rotating shaft 21. It is rotatably supported through. In the horn 17, a plurality of seal heads 33 (in the embodiment, two at 180° intervals) are radially provided at each predetermined angle on the first rotating shaft 21, and each seal head 33 has a rotatable ring on the outer circumferential surface. A pair of seal surfaces are provided spaced apart from each other in the front-rear width direction, which is the rotational direction of the seal head 33, with a groove recessed toward the shaft in between. The anvil 18 is rotatably supported by the pair of second support members 24a, 24b via bearings on the shaft end side of the second rotating shaft 23. The anvil 18 is provided with seal bars 34 that are paired with the seal heads 33 of the horn 17 and project from the second rotating shaft 23 at predetermined angles. A cutting means 35 is disposed within the anvil 18, and a through hole is formed at the protruding end of the seal bar 34 so that the cutting means 35 can be inserted and retracted. Seal surfaces that form a pair with the seal surfaces of the horns 17 are formed on both front and rear sides of the through holes of each seal bar 34 so as to extend in the width direction of the cylindrical film 10 . The tubular film 10 being conveyed is then sandwiched between the seal head 33 of the rotating horn 17 and the seal bar 34 of the anvil 18 at front and back positions sandwiching the articles 11 fed into the tubular film 10 at predetermined intervals. Then, the sealant of the packaging material is melted by the ultrasonic vibrations emitted from the horn 17, and a sealed transverse seal portion is formed across the transport direction of the cylindrical film 10. Each of the sealing surfaces of the seal head 33 and the seal bar 34 is provided with a sealing stitch forming portion for forming a predetermined sealing stitch on the horizontal sealing portion of the cylindrical film 10 during horizontal sealing.

図１に示す如く、前記切断手段３５は、各シールバー側に刃部３５ａを備えると共に、前記支持ベース３０に配設されて切断手段３５を径方向に往復移動するサーボモータなどのモータを駆動源とする図示しない往復動手段に連繋されている。往復動手段は、前記シール面で筒状フィルム１０を挟持するタイミングにおいて切断手段３５を作動し、アンビル１８のシール面から径方向に刃部３５ａが瞬間的に突出して、シール面で挟持される筒状フィルム１０を、該筒状フィルム１０の幅方向に切断するよう構成される。なお、切断手段３５は、アンビル１８のシール面から刃部３５ａを突出して筒状フィルム１０を切断する際には、刃部３５ａは、前記ホーン１７の溝部に非接触で受け入れられる。 As shown in FIG. 1, the cutting means 35 includes a blade portion 35a on each seal bar side, and drives a motor such as a servo motor that is disposed on the support base 30 and reciprocates the cutting means 35 in the radial direction. It is linked to a reciprocating means (not shown) which serves as a source. The reciprocating means operates the cutting means 35 at the timing when the tubular film 10 is clamped between the sealing surfaces, and the blade portion 35a momentarily protrudes in the radial direction from the sealing surface of the anvil 18, and is clamped between the sealing surfaces. It is configured to cut the cylindrical film 10 in the width direction of the cylindrical film 10. Note that when the cutting means 35 projects the blade portion 35a from the sealing surface of the anvil 18 to cut the cylindrical film 10, the blade portion 35a is received in the groove portion of the horn 17 without contacting it.

図１、図２に示す如く、前記ベース部材１５には、前記筒状フィルム１０の搬送路を挟む左右両側に、フィルム搬送方向前後に離間する一対のガイドシャフトからなるガイド部材３６,３６を備えた前記ガイド手段２５が夫々配設され、各ガイド手段２５に、上下方向で対向する前記第１支持部材２２ａ,２２ｂおよび第２支持部材２４ａ,２４ｂが支持される。ガイドシャフト３６は、ベース部材１５に立設された所定高さ寸法の大径部３７から上方に小径部が延出し、ガイドシャフト３６の延出端部が第１支持部材２２ａ,２２ｂの下部に止着されており、第１支持部材２２ａ,２２ｂは、ベース部材１５に対して一対のガイドシャフト３６,３６によって定位置に支持されている。そして、一対のガイドシャフト３６,３６における大径部３７,３７と第１支持部材２２ａ,２２ｂとの間に、第２支持部材２４ａ,２４ｂが、ガイドシャフト３６,３６に沿って第１支持部材２２ａ,２２ｂと接近・離間するよう上下方向に移動可能に支持される。フィルム搬送方向前後に離間する一対のガイドシャフト３６,３６の中間位置には、前記付勢手段２６を構成するエアシリンダ３８がベース部材１５に夫々配設されており、両エアシリンダ３８,３８の上方に延出するピストンロッドが、前記支持ベース３０に配設された第２支持部材２４ａ,２４ｂの直下を上方へ押圧可能に夫々連結されている。すなわち、第２支持部材２４ａ,２４ｂの夫々は、エアシリンダ３８によって、第１支持部材２２ａ,２２ｂに向けて所定圧力で下方から付勢されるよう構成してある。 As shown in FIGS. 1 and 2, the base member 15 is provided with guide members 36, 36 on both left and right sides of the transport path of the tubular film 10, each consisting of a pair of guide shafts spaced apart from each other in the film transport direction. Each guide means 25 supports the first support members 22a, 22b and the second support members 24a, 24b, which face each other in the vertical direction. The guide shaft 36 has a small diameter portion extending upward from a large diameter portion 37 of a predetermined height that is erected on the base member 15, and the extending end of the guide shaft 36 is located at the bottom of the first support members 22a, 22b. The first support members 22a, 22b are fixedly attached to the base member 15 by a pair of guide shafts 36, 36 in a fixed position. Then, between the large diameter portions 37, 37 of the pair of guide shafts 36, 36 and the first support members 22a, 22b, the second support members 24a, 24b are attached to the first support members along the guide shafts 36, 36. It is supported so as to be movable in the vertical direction so as to approach and separate from 22a and 22b. Air cylinders 38 constituting the biasing means 26 are respectively disposed on the base member 15 at intermediate positions between the pair of guide shafts 36, 36 which are spaced apart in the front and back of the film transport direction. Piston rods extending upward are connected directly below the second support members 24a, 24b disposed on the support base 30 so as to be pressable upward. That is, each of the second support members 24a, 24b is configured to be biased from below toward the first support members 22a, 22b with a predetermined pressure by the air cylinder 38.

図５に示す如く、前記２基のエアシリンダ３８,３８は、エア供給源からのエア流路を切り替えてエアシリンダ３８,３８のピストンロッドを延出および引き込み動作する電磁弁４４と、エアの圧力を制御する電空レギュレータ３９に接続され、エアシリンダ３８,３８は、ピストンロッドをシリンダ本体から延出して、電空レギュレータ３９により圧力制御された付勢力によって、第２支持部材２４ａ,２４ｂを第１支持部材２２ａ,２２ｂに付勢する状態と、ピストンロッドをシリンダ本体に引き込んで第２支持部材２４ａ,２４ｂの付勢を解除して第１支持部材２２ａ,２２ｂから第２支持部材２４ａ,２４ｂを離間する状態とに切り換えられる。すなわち、エアシリンダ３８,３８による付勢状態では、図２に示す如く、第１支持部材２２ａ,２２ｂに第１回転軸２１を介して支持されるホーン１７と、第２支持部材２４ａ,２４ｂに第２回転軸２３を介して支持されるアンビル１８とは相互間隔が接近して、シールヘッド３３とシールバー３４とによる筒状フィルム１０の挟持が可能となる。また、エアシリンダ３８,３８による付勢解除状態では、図３に示す如く、第１支持部材２２ａ,２２ｂに第１回転軸２１を介して支持されるホーン１７と、第２支持部材２４ａ,２４ｂに第２回転軸２３を介して支持されるアンビル１８との相互間隔が拡がることで、シールヘッド３３とシールバー３４とのシール面同士が噛み合わない位置まで離間するよう構成される。また、エアシリンダ３８,３８の付勢解除状態では、アンビル１８のシール面から、前記刃部３５ａが突出した位置に位置付いた際に、ホーン１７とアンビル１８とが異なる位相で回転した際にも、アンビル１８のシール面から突出する前記刃部３５ａが、ホーン１７のシールヘッド３３やホーン１７の外縁部に接触干渉しない、ホーン１７とアンビル１８との離間間隔に設定される。実施例では、エアシリンダ３８,３８と、電空レギュレータ３９と、電磁弁４４とから前記付勢手段２６が構成される。 As shown in FIG. 5, the two air cylinders 38, 38 have a solenoid valve 44 that switches the air flow path from the air supply source to extend and retract the piston rods of the air cylinders 38, 38, and The air cylinders 38, 38 are connected to an electro-pneumatic regulator 39 that controls pressure, and the air cylinders 38, 38 have piston rods extending from the cylinder bodies to support the second support members 24a, 24b by a biasing force whose pressure is controlled by the electro-pneumatic regulator 39. The first supporting members 22a, 22b are biased, and the piston rod is pulled into the cylinder body to release the biasing of the second supporting members 24a, 24b, and the first supporting members 22a, 22b are moved from the second supporting member 24a, 24b is switched to a state where it is separated. That is, in the biased state by the air cylinders 38, 38, as shown in FIG. The anvil 18 supported via the second rotating shaft 23 is spaced close to each other, so that the cylindrical film 10 can be held between the seal head 33 and the seal bar 34. Further, in the state where the biasing force is released by the air cylinders 38, 38, as shown in FIG. By increasing the distance between the seal head 33 and the anvil 18 supported via the second rotating shaft 23, the seal head 33 and the seal bar 34 are spaced apart from each other to a position where their seal surfaces do not mesh with each other. In addition, when the air cylinders 38, 38 are in the unenergized state, when the blade portion 35a is positioned at a position protruding from the sealing surface of the anvil 18, when the horn 17 and the anvil 18 rotate at different phases, Also, the distance between the horn 17 and the anvil 18 is set such that the blade portion 35a protruding from the sealing surface of the anvil 18 does not come into contact with or interfere with the seal head 33 of the horn 17 or the outer edge of the horn 17. In the embodiment, the biasing means 26 is composed of air cylinders 38, 38, an electropneumatic regulator 39, and a solenoid valve 44.

図５に示す如く、包装機の制御手段４０に、前記第１駆動モータ２９、第２駆動モータ３２、電磁弁４４、電空レギュレータ３９、ブザーやランプなどの報知手段４１が接続される。また制御手段４０には、電源スイッチ４２や、包装機の運転を開始する起動スイッチ４３などの各種スイッチ類や包装機の(運転中などに)異常の検知を行う各種センサなどが接続される。包装機の運転中または停止中に、ホーン１７とアンビル１８との回転位相の位置同期状態が崩れた時に同期エラー信号(同期セット運転の要求信号)が制御手段４０へ入力された場合、その他の各種条件で、前記ホーン１７とアンビル１８との同期セット運転の要求信号が制御手段４０へ信号入力された場合に、該制御手段４０は、操作パネルなどのディスプレイの画面にエラー情報を表示すると共に、同期セット運転の実施を促すよう報知する。制御手段４０に同期セット運転の要求信号が入力されると、該制御手段４０から電磁弁４４には付勢解除信号が出力され、前記２基のエアシリンダ３８,３８の付勢を解除してホーン１７とアンビル１８との相互間隔が拡がる状態となって、ホーン１７とアンビル１８との回転位相の位置同期状態が崩れたまま待機状態となる。位置同期状態が崩れた原因に対して適切な対処がなされた後に、ホーン１７とアンビル１８との同期セット運転が実行される。同期セット運転は、エラー報知の解除操作後に、続いて、作業者による包装機の起動スイッチ操作により行われる。シールヘッド３３とシールバー３４との両シール面が夫々横方向に向く位置が、ホーン１７とアンビル１８との夫々の原点位置として設定されている。同期セット運転により、前記駆動モータ２９,３２が夫々低速で回転作動されて、ホーン１７とアンビル１８が前記原点位置に達することで前記第１駆動モータ２９と第２駆動モータ３２の回転が停止する。そして、同期セット運転が完了すると、制御手段４０は、電磁弁４４に付勢信号を出力し、２基のエアシリンダ３８,３８により第２支持部材２４ａ,２４ｂを第１支持部材２２ａ,２２ｂに向けて電空レギュレータ３９により所定圧を保持して付勢することで、ホーン１７とアンビル１８との相互間隔が接近して狭まり、シールヘッド３３とシールバー３４とにより筒状フィルム１０を挟持して該筒状フィルム１０に横シールを施し得る状態に復帰させる。その際に付勢される圧力は、電空レギュレータ３９による所定圧に保持される。 As shown in FIG. 5, the first drive motor 29, second drive motor 32, electromagnetic valve 44, electropneumatic regulator 39, and notification means 41 such as a buzzer or lamp are connected to the control means 40 of the packaging machine. Further, the control means 40 is connected to various switches such as a power switch 42 and a starting switch 43 for starting the operation of the packaging machine, and various sensors for detecting abnormalities in the packaging machine (during operation, etc.). If a synchronization error signal (request signal for synchronous set operation) is input to the control means 40 when the position synchronization of the rotational phases between the horn 17 and the anvil 18 is broken while the packaging machine is in operation or stopped, other When a request signal for synchronous set operation of the horn 17 and anvil 18 is input to the control means 40 under various conditions, the control means 40 displays error information on the screen of a display such as an operation panel, and , sends a notification to encourage implementation of synchronous set operation. When a request signal for synchronous set operation is input to the control means 40, an energization release signal is output from the control means 40 to the solenoid valve 44, and the energization of the two air cylinders 38, 38 is released. The distance between the horn 17 and the anvil 18 widens, and the horn 17 and the anvil 18 enter a standby state with their rotational phases out of synchronization. After appropriate measures have been taken for the cause of the breakdown of the positional synchronization state, a synchronous set operation of the horn 17 and the anvil 18 is performed. The synchronous set operation is performed by the operator operating the starting switch of the packaging machine after the error notification is canceled. The positions where both the sealing surfaces of the seal head 33 and the seal bar 34 face in the lateral direction are set as the origin positions of the horn 17 and the anvil 18, respectively. Due to the synchronous set operation, the drive motors 29 and 32 are rotated at a low speed, and when the horn 17 and the anvil 18 reach the original position, the rotation of the first drive motor 29 and the second drive motor 32 is stopped. . When the synchronous set operation is completed, the control means 40 outputs an energizing signal to the solenoid valve 44, and the two air cylinders 38, 38 move the second support members 24a, 24b to the first support members 22a, 22b. By maintaining a predetermined pressure and applying force using the electropneumatic regulator 39, the distance between the horn 17 and the anvil 18 approaches and narrows, and the cylindrical film 10 is held between the seal head 33 and the seal bar 34. The cylindrical film 10 is returned to a state in which a horizontal seal can be applied. The pressure applied at this time is maintained at a predetermined pressure by the electropneumatic regulator 39.

ここで、包装機の運転中または電源ＯＮ状態での停止中にホーン１７とアンビル１８との回転位相の位置同期状態が崩れてしまう状態とは、例えば、ホーン１７とアンビル１８とで物品１１を噛み込んで、第１および第２駆動モータ２９,３２に負荷が掛かって同期ずれが生じた状態、停止中のメンテナンス作業などにおいて、ホーン１７とアンビル１８の回転位置を作業者が手回しして変更したことで同期ずれが生じた状態、何らかの要因で筒状フィルム１０に搬送不良が生じて横シール装置との同期ずれが生じた状態などである。ホーン１７とアンビル１８との回転位相の位置同期状態が崩れた、同期ずれは、第１および第２駆動モータ２９,３２やホーン１７およびアンビル１８の回転部に配設された原点センサ４５ａ,４５ｂの検出時の駆動モータ２９,３２に設けたエンコーダの回転角度信号がずれた場合、その他に、筒状フィルム１０のレジマーク検出不良信号が発信された場合(レジマークを検出できない場合や一定時間間隔でレジマークを検出できない場合)や、各駆動モータ２９,３２自体の動作不良などで同期状態ではなくなっていると制御手段４０が判断した場合には、同期セット運転の要求信号が入力されたとして処理する。すなわち、制御手段４０は、駆動モータ２９,３２やフィルム搬送手段に設けたエンコーダや、レジマークセンサなどの各種の検出機器からの信号に基づいて、各種の同期ずれが発生したものと判断した場合に、前記電磁弁４４に付勢解除信号を出力すると共に、同期セット運転を促す報知を行わせる。 Here, the state in which the positional synchronization of the rotational phases of the horn 17 and the anvil 18 is disrupted while the packaging machine is in operation or stopped with the power on is, for example, a state in which the horn 17 and the anvil 18 are When the horn 17 and the anvil 18 are jammed and the first and second drive motors 29, 32 are loaded and the synchronization is out of order, or during maintenance work while the horn 17 and the anvil 18 are stopped, the rotational positions of the horn 17 and the anvil 18 can be changed by turning the horn 17 and the anvil 18 by hand. This may be a state in which a synchronization error occurs due to a lateral sealing device, or a state in which a transport failure occurs in the cylindrical film 10 due to some factor, resulting in a synchronization shift with the horizontal sealing device. The synchronization state of the rotational phases of the horn 17 and the anvil 18 is broken, and the synchronization error is caused by the origin sensors 45a, 45b disposed on the first and second drive motors 29, 32 and the rotating parts of the horn 17 and anvil 18. If the rotation angle signal of the encoder provided to the drive motors 29, 32 deviates during detection, or if a registration mark detection failure signal of the cylindrical film 10 is sent (if the registration mark cannot be detected or for a certain period of time) If the control means 40 determines that the synchronous state is no longer due to a malfunction of the drive motors 29, 32 themselves, etc., a request signal for synchronous set operation is input. Process as . That is, when the control means 40 determines that various types of synchronization deviations have occurred based on signals from various detection devices such as drive motors 29 and 32, encoders provided in the film transport means, and registration mark sensors. Then, an energization release signal is output to the electromagnetic valve 44, and a notification is issued to prompt the synchronous set operation.

包装機の運転準備として、前記電源スイッチ４２のＯＮ操作によって電源ＯＮ信号(同期セット運転の要求信号)が制御手段４０に入力されると、包装運転に先立ち、各同期作動機構に対して同期セット運転を実行させるための信号が出力される。制御手段４０に同期セット運転の要求信号が入力されると、操作パネルの画面表示には、セット運転操作を行うことを促す表示がなされる。作業者の運転準備が整っている段階であれば、作業者が包装機の起動スイッチ４３を押すことで、同期セット運転が開始される。同期セット運転において、サーボモータで各作動機構が駆動制御される供給コンベヤとフィルム搬送手段および横シール装置を駆動する夫々のサーボモータが作動して、各機構の同期セット運転が低速で行われる。制御手段４０は、品種変更などで異なる包装条件に切り替え設定された後などにおいて、起動スイッチ４３を押すＯＮ操作時に出力される運転開始信号については、同期セット運転の要求信号と判断して処理する。そして、制御手段４０は、電源ＯＮ信号や、品種変更後の運転開始信号などの同期セット運転の要求信号が入力された(要求信号を制御手段４０が受けた)場合に、前記電磁弁４４に切り替え信号(付勢解除信号)を出力してシリンダのピストンロッドが引き込み作動され、第２支持部材２４ａ,２４ｂの第１支持部材２２ａ,２２ｂへの付勢力が解除されるよう構成される。 In preparation for operation of the packaging machine, when a power ON signal (request signal for synchronous set operation) is input to the control means 40 by turning on the power switch 42, synchronous set operation is performed for each synchronous operation mechanism prior to packaging operation. A signal for executing the operation is output. When a request signal for synchronous set operation is input to the control means 40, a display prompting to perform a set operation is displayed on the screen display of the operation panel. If the operator is ready for operation, the operator presses the start switch 43 of the packaging machine to start the synchronous set operation. In the synchronous set operation, the servo motors that drive the supply conveyor, the film transport means, and the horizontal sealing device, each of which is driven and controlled by a servo motor, are operated, and the synchronous set operation of each mechanism is performed at low speed. The control means 40 determines that the operation start signal that is output when the start switch 43 is turned ON after switching to a different packaging condition due to a product change or the like is a request signal for synchronous set operation and processes it. . The control means 40 controls the solenoid valve 44 when a request signal for synchronous set operation, such as a power ON signal or an operation start signal after changing the product type, is input (the control means 40 receives the request signal). The switching signal (energizing release signal) is output, the piston rod of the cylinder is retracted, and the urging force of the second supporting members 24a, 24b to the first supporting members 22a, 22b is released.

次に、実施例に係る横形製袋充填機における横シール装置の作用について説明する。 Next, the operation of the horizontal sealing device in the horizontal bag-forming-filling machine according to the embodiment will be explained.

電源スイッチ４２をＯＮした後の包装機(横形製袋充填機)の運転中または停止中において、前記制御手段４０に同期セット運転の要求信号が入力された場合や、各種の検出機器からの信号に基づいて各種の同期状態の崩れが検出されて、制御手段４０が、横シール装置のホーン(一方のシール体)１７とアンビル(他方のシール体)１８との回転位相の同期ずれが生じたと判断する(同期セット運転の要求信号を受けたと判断する)と、運転中であれば各機構を停止すると共に、前記電磁弁４４に付勢解除信号を出力し、停止中であれば電磁弁４４に付勢解除信号を出力する。付勢解除信号が電磁弁４４に入力されると、２基のエアシリンダ３８,３８のピストンロッドがシリンダ本体に引き込まれるように作動し、前記第１支持部材２２ａ,２２ｂから第２支持部材２４ａ,２４ｂを離間することで、前記ホーン１７とアンビル１８との相互間隔が拡がる(図３参照)。そして、作業者が前記した同期セット運転の開始操作を行うべく、起動スイッチ４３を押すＯＮ操作を行うことで、制御手段４０は、前記第１駆動モータ２９および第２駆動モータ３２を低速で作動して、ホーン１７とアンビル１８との回転位置の位相にずれが無い、同期した位置となるように、前記原点位置まで復帰させる同期セット運転を行わせる。同期セット運転が完了すると、制御手段４０は電磁弁４４に付勢信号を出力し、該電磁弁４４は、２基のエアシリンダ３８,３８を、ピストンロッドがシリンダ本体から延出するように動作し、第２支持部材２４ａ,２４ｂを第１支持部材２２ａ,２２ｂに向けて付勢することで、ホーン１７とアンビル１８との相互間隔を自動的に接近させ、前記シールヘッド３３とシールバー３４とで筒状フィルム１０を所定圧で挟持可能な状態となって包装機の運転開始を待機する(図２参照)。 When a request signal for synchronous set operation is input to the control means 40 while the packaging machine (horizontal bag-filling machine) is in operation or stopped after the power switch 42 is turned on, or when signals from various detection devices are input. Based on this, various kinds of synchronization breakdowns are detected, and the control means 40 detects that the rotational phases of the horn (one seal body) 17 and the anvil (the other seal body) of the horizontal sealing device have become out of synchronization. When the determination is made (it is determined that a request signal for synchronous set operation has been received), each mechanism is stopped if it is in operation, and an energization release signal is output to the solenoid valve 44, and if it is stopped, the solenoid valve 44 is Outputs an energization release signal to. When the energization release signal is input to the solenoid valve 44, the piston rods of the two air cylinders 38, 38 are actuated to be drawn into the cylinder bodies, and the second support member 24a is moved from the first support members 22a, 22b to the second support member 24a. , 24b, the distance between the horn 17 and the anvil 18 increases (see FIG. 3). Then, when the operator presses the start switch 43 to start the synchronous set operation described above, the control means 40 operates the first drive motor 29 and the second drive motor 32 at low speed. Then, a synchronous set operation is performed to return the horn 17 and the anvil 18 to the original position so that the rotational positions of the horn 17 and the anvil 18 are in synchronized positions with no phase shift. When the synchronous set operation is completed, the control means 40 outputs an energizing signal to the solenoid valve 44, and the solenoid valve 44 operates the two air cylinders 38, 38 so that the piston rods extend from the cylinder bodies. By urging the second support members 24a, 24b toward the first support members 22a, 22b, the distance between the horn 17 and the anvil 18 is automatically brought closer, and the seal head 33 and the seal bar 34 are This makes it possible to clamp the cylindrical film 10 under a predetermined pressure, and waits for the packaging machine to start operating (see FIG. 2).

実施例の横シール装置では、ホーン１７とアンビル１８との回転位置の位置同期状態が崩れた場合など、前記制御手段４０に同期セット運転の要求信号が入力された際に、ホーン１７とアンビル１８との相互間隔を拡げた上で、第１駆動モータ２９および第２駆動モータ３２を低速で作動して同期セット運転を行うよう構成した。すなわち、ホーン１７のシール面とアンビル１８のシール面とは、噛み合い状態になることなく一定の距離で離間しているので、ホーン１７のシールヘッド３３とアンビル１８のシールバー３４とが、回転位相が異なったまま衝突するようなことがなく、シール面が接触干渉してシール目形成部が目潰れや欠損などを生じて損傷してしまうことを防止することができる。また、同期セット運転の際に、フィルム搬送が停止状態にある場合であっても、ホーン１７のシールヘッド３３とアンビル１８のシールバー３４とが原点位置まで復帰する際の回転時において、両シール面で筒状フィルム１０を挟持して搬送方向下流へ過度に引っ張って引き千切ってしまったり、搬送方向上流へ引き戻して縮めてしまったりすることもなく、その際に、筒状フィルム１０中に供給された物品１１の位置ずれが生じてしまうのを防止することができる。 In the horizontal sealing device of the embodiment, when a request signal for synchronous set operation is input to the control means 40, such as when the position synchronization of the rotational positions of the horn 17 and the anvil 18 is broken, the horn 17 and the anvil 18 are The configuration is such that the first drive motor 29 and the second drive motor 32 are operated at low speed to perform a synchronous set operation while increasing the distance between them. That is, since the sealing surface of the horn 17 and the sealing surface of the anvil 18 are separated by a certain distance without being in an engaged state, the sealing head 33 of the horn 17 and the sealing bar 34 of the anvil 18 are in rotational phase. It is possible to prevent the sealing surfaces from colliding with each other while the sealing surfaces are different, and it is possible to prevent the sealing surfaces from contacting and interfering and causing damage such as crushing or chipping of the sealing eye forming portion. Furthermore, even if the film transport is stopped during the synchronous set operation, both seals can There is no need to pinch the tubular film 10 between the surfaces and pull it excessively downstream in the conveyance direction and tear it to pieces, or pull it back upstream in the conveyance direction and shrink it. It is possible to prevent the supplied article 11 from being misaligned.

実施例の横シール装置では、第１回転軸２１をホーン１７の両側で回転可能に支持する第１支持部材２２ａ,２２ｂを、第２回転軸２３をアンビル１８の両側で回転可能に支持する第２支持部材２４ａ,２４ｂに対して接近・離間移動可能に支持し、第１支持部材２２ａ,２２ｂに対して第２支持部材２４ａ,２４ｂを接近・離間移動することで、ホーン１７とアンビル１８との相互間隔を可変するよう構成したので、ホーン１７とアンビル１８の姿勢を変化することなく接近・離間することができ、筒状フィルム１０の挟持状態が変化して横シール不良を招くことがない。 In the horizontal sealing device of the embodiment, the first support members 22a and 22b rotatably support the first rotating shaft 21 on both sides of the horn 17, and the first supporting members 22a and 22b rotatably support the second rotating shaft 23 on both sides of the anvil 18. The horn 17 and anvil 18 are supported by supporting the second supporting members 24a, 24b so as to be movable toward and away from each other, and by moving the second supporting members 24a, 24b toward and away from the first supporting members 22a, 22b. Since the mutual spacing between the horn 17 and the anvil 18 is configured to be variable, the horn 17 and the anvil 18 can be approached and separated from each other without changing their postures, and the sandwiched state of the cylindrical film 10 will not change and cause a lateral seal failure. .

前記付勢手段２６のエアシリンダ３８,３８を、第２支持部材２４ａ,２４ｂの下方に配置されたベース部材１５に配設するよう構成したので、横シール装置における下方の空所へ、エアシリンダ３８,３８を収めるように配置することができ、エアシリンダ３８,３８をシールユニット２０の上方へ突出させることなく、装置上方に有効利用可能な空間領域を確保することができる。また、ホーン１７とアンビル１８とにより、超音波振動によって筒状フィルム１０を横シールする超音波シール方式としたので、ホーン１７およびアンビル１８は高温とならず、筒状フィルム１０を挟持するタイミングとの関係でホーン１７およびアンビル１８が停止する場合に、ホーン１７およびアンビル１８が筒状フィルム１０に接触しないようにする包装材のやけど防止対策を講じる必要がなくなる。すなわち、筒状フィルム１０のやけど防止対策のために付勢ストロークの大きなエアシリンダ３８,３８を採用する必要はなく、付勢ストロークが少ないコンパクトなシリンダを選定でき、装置の小型化を図ることができる。また、横シール装置のメンテナンス時において、ホーン１７のシールヘッド３３とアンビル１８のシールバー３４とは加熱によって温度上昇することがないので、直ちにメンテナンス作業に取り掛かることができ、メンテナンスの対応時間を短縮することができる。 Since the air cylinders 38, 38 of the biasing means 26 are arranged on the base member 15 disposed below the second support members 24a, 24b, the air cylinders 38, 38, and it is possible to secure an effectively usable space above the device without making the air cylinders 38, 38 protrude above the seal unit 20. In addition, since the horn 17 and anvil 18 employ an ultrasonic sealing method in which the cylindrical film 10 is laterally sealed by ultrasonic vibration, the horn 17 and the anvil 18 do not reach high temperatures, and the timing for sandwiching the cylindrical film 10 is controlled. When the horn 17 and anvil 18 are stopped due to this relationship, there is no need to take measures to prevent burns on the packaging material to prevent the horn 17 and anvil 18 from coming into contact with the cylindrical film 10. In other words, it is not necessary to use air cylinders 38, 38 with a large biasing stroke to prevent burns on the cylindrical film 10, and a compact cylinder with a small biasing stroke can be selected, making it possible to downsize the device. can. Furthermore, during maintenance of the lateral seal device, the seal head 33 of the horn 17 and the seal bar 34 of the anvil 18 do not rise in temperature due to heating, so maintenance work can be started immediately, reducing maintenance response time. can do.

横シール装置の同期セット運転は、搬送停止中の筒状フィルム１０に悪影響を及ぼすことなく他の機構とは独立して行うことができるので、ホーン１７およびアンビル１８の回転移動に合わせて事前にセッティングした筒状フィルム１０を搬送しつつ下流まで送り出す必要がなく、同期セット運転のためにフィルムの無駄な消費を無くすことができる。また、供給コンベヤやフィルム搬送手段などの各機構と共に同期位置合わせを行う際に、横シール装置の同期セット運転を、フィルム搬送手段の同期位置合わせ搬送動作と切り離して行っても、前記フィルム搬送が停止状態にある場合と同様に、筒状フィルム１０を引き千切ってしまったり、筒状フィルム中の物品相互の間隔がずれてしまったりする不都合が生じるのを防ぐことができ、同期位置合わせ後に直ちに正常運転に移行可能な待機状態とすることができる。 The synchronized set operation of the horizontal sealing device can be performed independently of other mechanisms without adversely affecting the cylindrical film 10 during transportation stoppage, so it can be performed in advance in accordance with the rotational movement of the horn 17 and anvil 18. There is no need to send the set cylindrical film 10 downstream while conveying it, and wasteful consumption of film due to synchronous set operation can be eliminated. Furthermore, when synchronous positioning is performed together with each mechanism such as the supply conveyor and film transport means, even if the synchronous set operation of the horizontal sealing device is separated from the synchronous position alignment transport operation of the film transport means, the film transport is As in the case of the stopped state, it is possible to prevent problems such as tearing the tubular film 10 or misalignment of the distance between the objects in the tubular film, and to It is possible to enter a standby state in which normal operation can be immediately resumed.

ここで、本実施例の如く切断手段３５として、一対のシール体１７,１８のシール面同士が噛み合うタイミングで、何れか一方のシール体１８の内部に収容している切断刃をシール面から突出することで、シール面で挟持している筒状フィルム１０を切断する、所謂「突き切り」方式の切断手段を採用している構成の横シール装置では、シール体相互の回転位相の位置同期状態が崩れた場合、切断刃の刃先がシール体のシール面から突出したまま回転して他方のシール体に接触干渉してしまうことが想定される。実施例の横シール装置の同期セット運転では、切断手段３５の同期がなされるまで、２基のエアシリンダ３８,３８のピストンロッドがシリンダ本体に引き込まれて、ホーン１７とアンビル１８との相互間隔は拡がっているので、同期セット運転時にホーン１７とアンビル１８とが同期するまでの回転状態においてアンビル１８におけるシールバー３４のシール面から飛び出た切断手段３５の切部３５ａが、ホーン１７との回転位相が一致していない状態で回転する際のシールヘッド３３や溝部以外のホーン１７の外縁部に接触するのを防ぐことができ、切断手段３５やホーン１７が損傷するのを回避することができる。 Here, as in this embodiment, as the cutting means 35, a cutting blade housed inside one of the seal bodies 18 is protruded from the seal surface at the timing when the seal surfaces of the pair of seal bodies 17 and 18 engage with each other. By doing so, in the horizontal sealing device configured to adopt a so-called "cutting off" method cutting means for cutting the cylindrical film 10 held between the sealing surfaces, the rotational phases of the sealing bodies are synchronized with each other. If the seal collapses, it is assumed that the cutting edge of the cutting blade rotates while protruding from the seal surface of the seal body and contacts and interferes with the other seal body. In the synchronized set operation of the transverse seal device of the embodiment, the piston rods of the two air cylinders 38, 38 are retracted into the cylinder body until the cutting means 35 is synchronized, and the mutual distance between the horn 17 and the anvil 18 is reduced. is widened, so that the cut portion 35a of the cutting means 35 that protrudes from the sealing surface of the seal bar 34 on the anvil 18 is rotated with the horn 17 in the rotating state until the horn 17 and anvil 18 are synchronized during the synchronous set operation. It is possible to prevent contact with the outer edge of the horn 17 other than the seal head 33 and the groove when rotating in a state where the phases do not match, and damage to the cutting means 35 and the horn 17 can be avoided. .

(変更例)
本発明は実施例の構成に限定されるものではなく、例えば、以下のようにも変更実施可能である。また、以下の変更例に限らず、実施例に記載した構成については、本発明の主旨の範囲内において種々の実施形態を採用し得る。
(1) シールユニット２０は、ホーン１７とアンビル１８とからなる超音波シール方式に限らず、シール体にヒータなどの加熱源を配設した加熱シール方式であってもよい。加熱シール方式のシール体を採用する場合に、エアシリンダ３８,３８による一対のシール体の離間位置を、該シール体の回転軌跡が筒状フィルム１０に接触しない範囲とすることで、シール体がフィルムに接触、挟持するなどしてフィルムを溶かしてしまうことを防止することができる。
(2) 回転軸２１,２３に設けるシールヘッド３３やシールバー３４は、１８０度間隔で２つ設ける構成に限らず、シールヘッド３３やシールバー３４が、１つまたは３つ以上で回転軸２１,２３から放射状に設けられるものであってもよく、切断手段３５の刃部３５ａは、シールバー３４の配設数に対応していればよい。
(3) 一対のシール体(ホーン１７とアンビル１８)は、上下の関係に限らず左右の関係で配置されるなど、回転軸２１,２３が水平方向または垂直方向に配置される構成を採用することができる。
(4) 一方の支持部材２４ａ,２４ｂを他方の支持部材２２ａ,２２ｂに付勢する向きは、上から下であってもよい。また、第１支持部材２２ａ,２２ｂと第２支持部材２４ａ,２４ｂとを左右に並ぶように配置した場合は、何れか一方を他方へ付勢する付勢手段２６の配置とすればよい。 (Example of change)
The present invention is not limited to the configuration of the embodiment, but can be modified as follows, for example. In addition, various embodiments may be adopted for the configurations described in the examples, without being limited to the following modified examples, within the scope of the gist of the present invention.
(1) The sealing unit 20 is not limited to the ultrasonic sealing method consisting of the horn 17 and the anvil 18, but may also be a heating sealing method in which a heating source such as a heater is provided in the sealing body. When employing a heat-sealing type seal body, by setting the pair of seal bodies separated by the air cylinders 38, 38 within a range where the rotation locus of the seal body does not come into contact with the tubular film 10, the seal body can be It is possible to prevent the film from melting due to contact with the film, pinching, etc.
(2) The seal heads 33 and seal bars 34 provided on the rotating shafts 21 and 23 are not limited to the configuration in which two seal heads 33 and seal bars 34 are provided at 180 degree intervals. , 23, and the number of blade portions 35a of the cutting means 35 may correspond to the number of seal bars 34 provided.
(3) The pair of seal bodies (the horn 17 and the anvil 18) are arranged not only in a vertical relationship but also in a left-right relationship, such that the rotating shafts 21 and 23 are arranged in a horizontal or vertical direction. be able to.
(4) The direction in which one support member 24a, 24b is urged against the other support member 22a, 22b may be from top to bottom. Further, when the first support members 22a, 22b and the second support members 24a, 24b are arranged side by side, the urging means 26 may be arranged to urge one of them toward the other.

(5) 付勢手段２６は、駆動モータでカムレバーやリンク機構に連繋して、一対のシール体を離間状態と接近状態とに切り替える機構等、各種の手段を採用することができる。
(6) 切断手段３５は、シールバー３４のシール面から突出する突き切り方式に代えて、シール面から突出して設けられた切り刃と他方のシール面に設けられた受け刃のフラットな受け面とにより筒状フィルム１０を押し切る当て切り方式の切断手段を採用することができる。
(7) 切断手段３５を往復移動する往復動手段は、モータによって動作する構成に限らず、アンビル１８の回転に合わせてカムリンク機構などの機械的連繋手段やエアシリンダ、その他の往復動手段などによって切断手段３５を往復動作する構成などを採用することができる。 (5) The biasing means 26 can employ various means, such as a mechanism in which a drive motor is connected to a cam lever or a link mechanism to switch the pair of seal bodies between a separated state and an approaching state.
(6) The cutting means 35 has a flat receiving surface of a cutting blade protruding from the sealing surface and a receiving blade provided on the other sealing surface, instead of cutting off the sealing surface of the seal bar 34. It is possible to employ a hit-cut type cutting means that presses the cylindrical film 10 completely.
(7) The reciprocating means for reciprocating the cutting means 35 is not limited to a configuration operated by a motor, but may include mechanical linkage means such as a cam link mechanism, an air cylinder, or other reciprocating means in accordance with the rotation of the anvil 18. A configuration in which the cutting means 35 is reciprocated can be adopted.

１０ 筒状フィルム(筒状包装材)，１１ 物品，１５ ベース部材
１７ ホーン(シール体)，１８ アンビル(シール体)，１９ 振動発生手段
２１ 第１回転軸，２２ａ,２２ｂ 第１支持部材，２３ 第２回転軸
２４ａ,２４ｂ 第２支持部材，２６ 付勢手段，２９ 第１駆動モータ
３２ 第２駆動モータ，４０ 制御手段 10 cylindrical film (cylindrical packaging material), 11 article, 15 base member 17 horn (seal body), 18 anvil (seal body), 19 vibration generating means 21 first rotating shaft, 22a, 22b first support member, 23 2nd rotating shaft 24a, 24b 2nd support member, 26 urging means, 29 1st drive motor 32 2nd drive motor, 40 control means

Claims (4)

筒状包装材の搬送路を挟んで相互に反対方向に回転する一対のシール体によって、筒状包装材中に供給された物品を挟む前後で挟持して筒状包装材の搬送方向と交差する方向へ横シールを施す横形製袋充填機における横シール装置において、
一方のシール体が配設された第１回転軸を回転する第１駆動モータと、
他方のシール体が配設された第２回転軸を回転する第２駆動モータと、
前記第１回転軸および第２回転軸の一方を他方に付勢して両回転軸を接近し、付勢解除により両回転軸を離間する付勢手段と、
前記第１駆動モータと第２駆動モータとの同期セット運転の要求信号を受けて、前記付勢手段に付勢解除信号を出力して、前記第１回転軸と第２回転軸とを離間することで一対のシール体の相互間隔を拡げ、前記同期セット運転の完了により前記付勢手段に付勢信号を出力して、一対のシール体で筒状包装材を挟持して横シールを施すことが可能なシール体の相互間隔となるよう、前記第１回転軸と第２回転軸とを接近させる制御手段と、を備えた
ことを特徴とする横形製袋充填機における横シール装置。 A pair of seal bodies that rotate in opposite directions across the conveyance path of the cylindrical packaging material sandwich the article fed into the cylindrical packaging material at the front and back, intersecting the direction of conveyance of the cylindrical packaging material. In the horizontal sealing device of the horizontal bag making and filling machine that applies horizontal sealing in the direction,
a first drive motor that rotates a first rotating shaft on which one seal body is disposed;
a second drive motor that rotates a second rotating shaft on which the other seal body is disposed;
a biasing means for biasing one of the first rotation shaft and the second rotation shaft toward the other to bring the two rotation shafts closer together, and for releasing the bias to separate the two rotation shafts;
Upon receiving a request signal for a synchronous set operation of the first drive motor and the second drive motor, an energizing release signal is output to the energizing means to separate the first rotating shaft and the second rotating shaft. By doing so, the distance between the pair of seal bodies is widened, and upon completion of the synchronized set operation, a biasing signal is output to the biasing means, and the cylindrical packaging material is sandwiched between the pair of seal bodies and horizontally sealed. 1. A horizontal sealing device for a horizontal bag-forming-filling machine, comprising: control means for bringing the first rotating shaft and the second rotating shaft closer together so that the mutual spacing between the sealing bodies is such that the distance between the sealing bodies is such that the distance between the sealing bodies is such that the distance between the sealing bodies is such that the distance between the sealing bodies is such that the distance between the sealing bodies is such that the distance between the sealing bodies is such that the first rotating shaft and the second rotating shaft are close to each other. 前記第１回転軸における一方のシール体の両側の軸端側で、第１回転軸を回転自在に支持する第１支持部材と、
前記第２回転軸における他方のシール体の両側の軸端側で、第２回転軸を回転自在に支持する第２支持部材と、を備え、
前記付勢手段は、前記第１支持部材および第２支持部材の一方を他方に付勢するよう構成したことを特徴とする請求項１記載の横形製袋充填機における横シール装置。 a first support member rotatably supporting the first rotating shaft on both shaft end sides of one seal body of the first rotating shaft;
a second support member rotatably supporting the second rotating shaft on both shaft end sides of the other seal body of the second rotating shaft;
2. The horizontal sealing device for a horizontal bag-forming-filling machine according to claim 1, wherein the biasing means is configured to bias one of the first support member and the second support member toward the other. 前記第１支持部材の下方に、前記第２支持部材が接近・離間移動可能に支持され、
該第２支持部材の下方に配置したベース部材に、第２支持部材を第１支持部材に付勢する前記付勢手段を設けたことを特徴とする請求項２記載の横形製袋充填機における横シール装置。 The second support member is supported below the first support member so as to be movable toward and away from the first support member,
3. The horizontal bag making and filling machine according to claim 2, wherein the biasing means for biasing the second support member toward the first support member is provided on a base member disposed below the second support member. Horizontal sealing device. 一方のシール体を振動発生手段により超音波振動するホーンとすると共に、他方のシール体をアンビルとして構成し、
前記ホーンとアンビルとで挟持した前記筒状包装材に超音波振動による横シールを施すよう構成したことを特徴とする請求項１～３の何れか一項に記載の横形製袋充填機における横シール装置。 One seal body is configured as a horn that vibrates ultrasonically by a vibration generating means, and the other seal body is configured as an anvil,
The horizontal bag-forming-filling machine according to any one of claims 1 to 3, characterized in that the cylindrical packaging material held between the horn and the anvil is horizontally sealed by ultrasonic vibration. sealing device.

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