JP2009280233A - Shrink packaging apparatus - Google Patents

Shrink packaging apparatus Download PDF

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JP2009280233A
JP2009280233A JP2008133301A JP2008133301A JP2009280233A JP 2009280233 A JP2009280233 A JP 2009280233A JP 2008133301 A JP2008133301 A JP 2008133301A JP 2008133301 A JP2008133301 A JP 2008133301A JP 2009280233 A JP2009280233 A JP 2009280233A
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connection
furnace
heat source
heating chamber
heat sources
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JP5308715B2 (en
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Fusatomo Itakura
房友 板倉
Hide Toita
秀 戸板
Kenichi Seki
健一 関
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Kyowa Electric and Chemical Co Ltd
KYOWA DENKI KK
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Kyowa Electric and Chemical Co Ltd
KYOWA DENKI KK
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Abstract

<P>PROBLEM TO BE SOLVED: To save power consumption of a shrink packaging apparatus by changing the capacities of a required number of heat sources through switching their respective circuits, thereby keeping the inside of the furnace at temperature suitable for shrinking operation. <P>SOLUTION: The shrink packaging apparatus comprises: a box-shaped furnace casing whose both ends are open and which is formed from porous walls; an air heating chamber formed between the periphery of the furnace casing and an external body; a fan disposed in the heating chamber for circulating hot air, and the required number of the heat sources including electric heaters; and a conveyor disposed at the bottom in the furnace casing. In the shrink packaging device, the heat sources are connected by three connections, i.e., a Y connection, a &Delta; connection, and a V connection, to be associated with one another. The capacities of the heat sources are controlled by switching the circuits formed by the three connections. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

この発明は、被包装物に被せた熱収縮性の包装フィルムを熱風によりシュリンクして包装を行う装置に関するものである。   The present invention relates to an apparatus for shrinking and packaging a heat-shrinkable packaging film placed on an article to be packaged with hot air.

通常のシュリンク包装装置は、函状で両端が開口した多孔壁の炉体と、炉体周囲を囲繞する外装体との間に空気の加熱室を形成し、その加熱室の上部両側に設けた所要数の電熱ヒータにより空気を加熱して、加熱室の上部に設けたファンにより熱風を多孔壁を通して炉内と加熱室を循環させ、炉内底部に配設したコンベアに移送されてきた被包装物の包装フィルムを熱風によりシュリンクして、被包装物を密着包装する構成からなる。
特開2003−292030号公報
An ordinary shrink wrapping device has an air heating chamber formed between a box-shaped perforated wall furnace body open at both ends and an exterior body surrounding the furnace body, and is provided on both upper sides of the heating chamber. The air is heated by the required number of electric heaters, and hot air is circulated through the perforated wall between the furnace and the heating chamber by a fan provided in the upper part of the heating chamber, and then transferred to a conveyor disposed at the bottom of the furnace The product packaging film is shrunk with hot air, and the packaged product is tightly packed.
JP 2003-292030 A

上記シュリンク装置では、起動時の昇温時間の短縮を熱源容量を上げて行っており、炉内温度が設定温度に達した後も熱源容量を変えることなく電熱ヒータのON・OFFにより行っている。このため熱源容量はそのままなので消費電力が増加する傾向にあった。また熱源装置の一次側にトランス等の高価な降圧装置を取り付けて省電力化を図っていた。   In the above shrink device, the heating time is shortened by increasing the heat source capacity at the start-up, and even after the furnace temperature reaches the set temperature, the electric heater is turned on / off without changing the heat source capacity. . For this reason, since the heat source capacity remains the same, power consumption tends to increase. In addition, an expensive step-down device such as a transformer is attached to the primary side of the heat source device to save power.

この発明は、上記従来の課題を解決するために考えられたものであって、その目的は、所要数の熱源の回路の切換により熱源容量を変更して、炉内温度をシュリンク作業に適した温度に保持し、これにより消費電力の節減を図った新たなシュリンク包装装置を提供することにある。   The present invention has been conceived in order to solve the above-described conventional problems, and its purpose is to change the heat source capacity by switching the circuit of the required number of heat sources and to make the furnace temperature suitable for shrink work. An object of the present invention is to provide a new shrink wrapping apparatus which maintains the temperature and thereby saves power consumption.

上記目的によるこの発明は、函状で両端が開口した多孔壁の炉体と、炉体周囲の外装体との間に形成した空気の加熱室と、その加熱室に設けた熱風循環用のファン及び電熱ヒータによる所要数の熱源と、炉内底部に配設したコンベアとからなり、上記熱源の相互をY結線、Δ結線、V結線の3結線により結線して関連させ、その3結線の回路の切換により熱源容量を制御する構成からなる、というものである。   According to the above-mentioned object, the present invention provides a heating chamber for air formed between a box-shaped porous wall furnace open at both ends and an outer casing around the furnace body, and a hot air circulation fan provided in the heating chamber. And a required number of heat sources by an electric heater, and a conveyor disposed at the bottom of the furnace, and the heat sources are connected to each other by three connections of Y connection, Δ connection, and V connection, and a circuit of the three connections The heat source capacity is controlled by switching between the two.

また上記熱源は偶数で少なくとも6本からなり、上記加熱室の上部両側に同数をそれぞれ配置して、両側の熱源を上記3結線により結線して互いに関連させてなるというものであり、上記ファンは炉体内温度により制御され、起動時は上記熱源が設定温度に達するまで低速又は停止制御される構成からなる、というものである。   In addition, the heat source is an even number consisting of at least six, the same number is arranged on both sides of the upper part of the heating chamber, the heat sources on both sides are connected by the three connections, and the fans are related to each other. It is controlled by the temperature inside the furnace, and is configured to be controlled at low speed or stopped until the heat source reaches a set temperature at startup.

上記構成では、熱源容量がY結線、Δ結線、V結線で異なり、Y結線の熱源容量を100%としたとき、Δ結線では75%、Y結線では50%となり、熱源容量100%との比較において熱源容量75%では5〜10%、熱源容量50%では12〜20%の省エネルギーとなることから、炉内温度の状態により熱源の回路をΔ結線又はV結線に切換え、熱源容量100%を75%又は50%に抑制して、シュリンク包装が行えるので消費電力の節減となり、仕上がり状態が良好なシュリンク包装を省電力化の下に効率良く行えるようになる。   In the above configuration, the heat source capacity is different for Y connection, Δ connection, and V connection. When the heat source capacity of Y connection is 100%, it becomes 75% for Δ connection and 50% for Y connection, which is a comparison with heat source capacity 100%. In this case, the heat source capacity is 5 to 10% when the heat source capacity is 75% and 12 to 20% when the heat source capacity is 50%. Therefore, the circuit of the heat source is switched to Δ connection or V connection depending on the temperature in the furnace, and the heat source capacity is 100%. Since the shrink wrapping can be performed by suppressing to 75% or 50%, the power consumption is reduced, and the shrink wrap having a good finished state can be efficiently performed with power saving.

また起動時のファンの作動を、上記熱源が設定温度に達するまで停止又は低速に制御して、ファンによる冷風の影響をなくして熱源の立ち上がりを早くしたので、炉内温度の昇温時間が短縮され、従来のように熱源容量を上げて昇温時間を早める必要がないことから、起動時の消費電力の節減ともなり、また省電力化のためにトランス等の高価な降圧装置を取付ける必要もなくなるのでコスト低減ともなる。   Also, the operation of the fan at start-up is stopped or controlled at a low speed until the heat source reaches the set temperature, and the rise of the heat source is shortened by eliminating the influence of the cool air by the fan, so the furnace temperature rise time is shortened In addition, since it is not necessary to increase the heat source capacity and increase the heating time as in the conventional case, power consumption during startup can be saved, and an expensive step-down device such as a transformer needs to be installed to save power. Since it disappears, it also reduces cost.

図中1は両端が開口した函状の炉体で、上壁11を除く側壁12及び底壁13の壁板には多数の流通孔12a,13aが全体にわたり等間隔に穿設してあり、上壁11の中央部には流出穴11aが穿設してある。   In the figure, 1 is a box-shaped furnace body that is open at both ends, and a large number of flow holes 12a, 13a are formed at equal intervals throughout the wall plate of the side wall 12 and the bottom wall 13 excluding the upper wall 11. An outflow hole 11 a is formed in the central portion of the upper wall 11.

2は炉体1の外装体で、炉体1の開口端を除く周囲を囲繞するとともに開口端周囲を密閉する函状のもので、炉体周囲との間に空気の加熱室3を形成する所要幅の間隔を空けて設けてある。   Reference numeral 2 denotes an exterior body of the furnace body 1, which has a box shape that surrounds the periphery of the furnace body 1 except for the opening end and seals the periphery of the opening end, and forms an air heating chamber 3 between the periphery of the furnace body 1. The required width is provided at an interval.

この加熱室4の上部中央には熱風循環用のファン4が下向きに、上壁11の流出穴11aに臨ませて設けてある。また加熱室4の上部両隅には電熱ヒータが3本ずつ熱風の熱源5,5として長手方向に沿って配設してある。この熱源5,5により加熱された空気は、ファン4により熱風となって上記通孔12a,13aから炉内6に流入し、さらに上壁11の流出穴11aから加熱室3の上部に還流して、再び熱源5,5により加熱され炉内6に流入する。このような熱風の循環により炉内温度が設定温度に保たれる。   In the upper center of the heating chamber 4, a hot air circulation fan 4 is provided facing downward and facing the outflow hole 11 a of the upper wall 11. In addition, three electric heaters are arranged along the longitudinal direction as heat sources 5 and 5 for hot air at both upper corners of the heating chamber 4. The air heated by the heat sources 5 and 5 becomes hot air by the fan 4 and flows into the furnace 6 through the through holes 12a and 13a, and then returns to the upper portion of the heating chamber 3 through the outflow hole 11a of the upper wall 11. Then, it is again heated by the heat sources 5 and 5 and flows into the furnace 6. The temperature in the furnace is kept at the set temperature by such circulation of hot air.

7は炉内底部に水平に配設したコンベアで、炉体1の一方の開口端から他方の開口端に移動自在に設けられており、そのコンベア7により熱収縮性の包装フィルムを被せた被包装物品8が炉内6に移送されて来て、炉内6を通過する間に熱風による包装フィルムのシュリンク包装が行われる。9は炉体開口の遮温用暖簾である。   7 is a conveyor disposed horizontally on the bottom of the furnace, and is movably provided from one opening end of the furnace body 1 to the other opening end. The conveyor 7 is covered with a heat-shrinkable packaging film. The packaged article 8 is transferred into the furnace 6 and shrink wrapping of the packaging film with hot air is performed while passing through the furnace 6. Reference numeral 9 denotes a warming shield for insulating the furnace body opening.

上記熱源5,5は、加熱室4の上隅部の何れか一方に配設した電熱ヒータ5a,5b,5cと、他方に配設した電気ヒータ5a′,5b′,5c′の6本の電熱ヒータによるもので、それらの電熱ヒータは図3の各図に示す3結線の回路により互いに関連させて、回路の切換により熱源容量を制御できるようにしてある。   The heat sources 5 and 5 include six electric heaters 5a, 5b, and 5c disposed in any one of the upper corners of the heating chamber 4, and electric heaters 5a ', 5b', and 5c 'disposed in the other. These electric heaters are related to each other by a three-connection circuit shown in each diagram of FIG. 3, and the heat source capacity can be controlled by switching the circuits.

図3(A)は電熱ヒータ6本の結線を2回路Y結線とし、熱源容量100%として使用できるようにしたものである。図3(B)は電熱ヒータ6本の結線を2本直列のΔ結線とし、熱源容量75%として使用できるようにしたものである。図3(C)は電熱ヒータ4本使用で電熱ヒータの結線を2本直列のV結線とし、熱源容量50%として使用できるようにしたものである。また消費電力としては設定温度によりある程度の差はあるが、熱源容量100%との比較において熱源容量75%では5〜10%、熱源容量50%では12〜20%の省エネルギーとなる。   In FIG. 3A, the connection of six electric heaters is a two-circuit Y connection, which can be used as a heat source capacity of 100%. FIG. 3 (B) shows the connection of 6 electric heaters as a series Δ connection, which can be used as a heat source capacity of 75%. FIG. 3 (C) shows the case where four electric heaters are used and two electric heaters are connected in series with a V connection, and the heat source capacity is 50%. In addition, although there is a certain difference in power consumption depending on the set temperature, the energy saving is 5 to 10% when the heat source capacity is 75% and 12 to 20% when the heat source capacity is 50% compared to the heat source capacity of 100%.

次に作業工程の1例を説明すると、先ず起動スイッチをONする。これによりファン4とコンベア7のモータ(図は省略)がONしてファン4が低速回転し、コンベア7は循環移動する。また同時に熱源5,5のY結線(A)の回路がONし、6本の電熱ヒータが通電により発熱して加熱室3の空気を加熱する。空気はファン4により加熱室3と炉内6を循環しながら昇温してゆく。低速回転によるファン4の送風では、加熱室内の空気の移動が緩速で行われるので、昇温過程での送風による熱源5,5の冷却が抑制されるようになり、このため熱源5,5が設定温度に早く達するようになって、立ち上がり時間が短くなる。   Next, an example of the work process will be described. First, the start switch is turned on. As a result, the motors of the fan 4 and the conveyor 7 (not shown) are turned on, the fan 4 rotates at a low speed, and the conveyor 7 circulates. At the same time, the Y connection (A) circuit of the heat sources 5 and 5 is turned ON, and the six electric heaters generate heat when energized to heat the air in the heating chamber 3. The air is heated by the fan 4 while circulating through the heating chamber 3 and the furnace 6. When the fan 4 is blown at a low speed, the air in the heating chamber is moved at a slow speed, so that the cooling of the heat sources 5 and 5 due to the blow in the temperature rising process is suppressed, and thus the heat sources 5 and 5 are suppressed. Reaches the set temperature early and the rise time is shortened.

炉内6の温度は温度検出器(図示せず)により常時検出されており、Y結線(A)の回路による発熱容量100%で炉内温度が設定温度に達すると、その温度検出により上記ファン4のモータ出力が低速回転からそれよりも高速の常用回転に切換えられる。この切換えの後に包装フィルムを被せた被包装物品8がコンベア7により炉内6に移送されて来て、炉内6を通過する間に熱風によるシュリンク包装が行われる。   The temperature in the furnace 6 is constantly detected by a temperature detector (not shown), and when the furnace temperature reaches the set temperature with a heat generation capacity of 100% by the circuit of the Y connection (A), the fan is detected by detecting the temperature. The motor output No. 4 is switched from a low speed rotation to a normal rotation speed higher than that. After this switching, the article to be packaged 8 covered with the packaging film is transferred to the furnace 6 by the conveyor 7, and shrink wrapping with hot air is performed while passing through the furnace 6.

炉内温度が安定したところで、熱源5,5をY結線(A)の回路から熱源容量50%のV結線(C)の回路に切換えて熱源容量を二次的に制御し、その温度範囲を保持してシュリンク包装を行う。またシュリンクフイルムの熱収縮性によりことなるが、炉内におけるシュリンク作業温度を予めT℃以上と設定し、その炉内温度の検出値T℃−2℃を下限値として、その温度に達すると回路をV結線(C)の回路から熱源容量75%のΔ結線(B)の回路に切換えて炉内温度をT℃以上の設定温度まで昇温する。設定温度に達したことが検出されると熱源5,5の回路が再びV結線(C)の回路に切換てシュリンク作業温度を保持するようになる。   When the furnace temperature is stabilized, the heat sources 5 and 5 are switched from the Y-connection (A) circuit to the V-connection (C) circuit with a heat source capacity of 50%, and the heat source capacity is secondarily controlled. Hold and shrink-wrap. Depending on the heat shrinkability of the shrink film, the shrink working temperature in the furnace is set to T ° C or higher in advance, and the detected temperature T ° C-2 ° C of the furnace temperature is set as the lower limit value. Is switched from a circuit of V connection (C) to a circuit of Δ connection (B) having a heat source capacity of 75%, and the furnace temperature is raised to a set temperature of T ° C. or higher. When it is detected that the set temperature has been reached, the circuits of the heat sources 5 and 5 are switched again to the circuit of the V connection (C) to maintain the shrink working temperature.

したがって、熱源容量100%での加熱は起動時のみとなり、シュリンク作業は熱源容量75%〜50%の範囲で設定温度を保持して効率良く行われることになるので、消費電力の節減となる。   Therefore, the heating with the heat source capacity of 100% is performed only at the time of start-up, and the shrink work is efficiently performed while maintaining the set temperature in the range of the heat source capacity of 75% to 50%, thereby reducing power consumption.

なお、上記作業工程では起動時のファン4の回転を設定温度に達するまで低速回転としているが、場合よっては炉内6の温度が設定温度に達するまでファン4を停止させておき、設定温度に達してから始動して常用回転してもよい。
また室内温度が低温の場合又は被包装物品8が低温製品の場合には、熱源容量100%のY結線(A)の回路からか熱源容量75%のΔ結線(B)の回路に切換えて設定温度を保持することが好ましい。
In the above-described work process, the rotation of the fan 4 at the time of start-up is set to a low-speed rotation until reaching the set temperature. However, in some cases, the fan 4 is stopped until the temperature in the furnace 6 reaches the set temperature. It may start after reaching the normal rotation.
When the room temperature is low or the packaged article 8 is a low-temperature product, the setting is switched from the Y connection (A) circuit with a heat source capacity of 100% or the Δ connection (B) circuit with a heat source capacity of 75%. It is preferable to maintain the temperature.

この発明に係わるシュリンク包装装置の縦断正面図である。It is a vertical front view of the shrink wrapping apparatus concerning this invention. 同上の縦断側面図である。It is a vertical side view same as the above. 6本の電熱ヒータによる熱源の3結線による回路図である。It is a circuit diagram by 3 connection of the heat source by six electric heaters.

符号の説明Explanation of symbols

1 炉体
2 外装体
3 空気の加熱室
4 熱風循環用のファン
5 熱風の熱源
6 炉内
7 コンベア
8 被包装物品
11a 流出穴
12a,13a 流入孔
DESCRIPTION OF SYMBOLS 1 Furnace body 2 Exterior body 3 Air heating chamber 4 Fan for hot air circulation 5 Heat source of hot air 6 Furnace 7 Conveyor 8 Packaged article 11a Outflow hole 12a, 13a Inflow hole

Claims (3)

函状で両端が開口した多孔壁の炉体と、炉体周囲の外装体との間に形成した空気の加熱室と、その加熱室に設けた熱風循環用のファン及び電熱ヒータによる所要数の熱源と、炉内底部に配設したコンベアとからなり、
上記熱源の相互をY結線、V結線、Δ結線の3結線により結線して関連させ、その3結線の回路の切換により熱源容量を制御する構成からなることを特徴とするシュリンク包装装置。
The air heating chamber formed between the box-shaped perforated wall furnace body open at both ends and the exterior body surrounding the furnace body, and the required number of hot air circulation fans and electric heaters provided in the heating chamber It consists of a heat source and a conveyor arranged at the bottom of the furnace,
A shrink wrapping apparatus comprising: a configuration in which the heat sources are connected by a Y-connection, a V-connection, and a Δ-connection, and the heat source capacity is controlled by switching a circuit of the three connections.
上記熱源は偶数で少なくとも6本からなり、上記加熱室の上部両側に同数をそれぞれ配置して、両側の熱源を上記3結線により結線して互いに関連させてなることを特徴とする請求項1記載のシュリンク包装装置。   2. The heat source comprises an even number of at least six, and the same number is disposed on both sides of the upper portion of the heating chamber, and the heat sources on both sides are connected by the three connections and are related to each other. Shrink wrapping equipment. 上記ファンは炉内温度により制御され、起動時は上記熱源が設定温度に達するまで低速又は停止制御される構成からなることを特徴とする請求項1記載のシュリンク包装装置。   2. The shrink wrapping apparatus according to claim 1, wherein the fan is controlled by a furnace temperature, and is configured to be controlled at a low speed or stopped until the heat source reaches a set temperature at startup.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6127804U (en) * 1984-07-23 1986-02-19 茨木精機株式会社 Film heat shrink equipment for packaging products
JP2001048128A (en) * 1999-07-30 2001-02-20 Kyowa Denki Kk Heat shrinkable packaging method and its device
JP2004232188A (en) * 2004-04-19 2004-08-19 Tsudakoma Corp Method for starting loom

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6127804U (en) * 1984-07-23 1986-02-19 茨木精機株式会社 Film heat shrink equipment for packaging products
JP2001048128A (en) * 1999-07-30 2001-02-20 Kyowa Denki Kk Heat shrinkable packaging method and its device
JP2004232188A (en) * 2004-04-19 2004-08-19 Tsudakoma Corp Method for starting loom

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