JP2006335426A - Method and apparatus for reusing newspaper packaging bags - Google Patents

Abstract

The present invention provides a newspaper packaging method and apparatus in which a packaging bag can be reused as a garbage bag or the like.
A sealed packaging apparatus and method for newspapers, etc., between synthetic resin long films welded at the tip, wherein the insertion time of the newspaper is detected by an insertion sensor, the newspaper and film are conveyed, and the newspaper After the trailing edge is detected by the stop sensor, the front and rear edges of the two films are welded and cut and the edges of both sides are welded to complete the sealed packaging of the newspaper. The two side ends are welded by pressing the side welding blades heated by the side welding blade heaters to the side cradles on both sides of the end welding mechanism. In the above method, one end of both side ends is welded in a completely fused state, and the other end is not damaged to the extent that the two newspaper packaging films are damaged in the peeling process when the newspaper is taken out. In a semi-fused state Chakusuru.
[Selection] Figure 6

Description

The present invention
Newspaper or a bundle of newspapers, weekly magazines, and home delivery papers are sealed and packaged between two thin, long plastic packaging films made of synthetic resin with the tips welded together. A method for operating a packaging device,
The insertion time of this newspaper is detected by the insertion sensor,
In response to this signal, this newspaper and the transport device for transporting these two films are started and transported together.
After detecting the trailing edge of the newspaper by a stop sensor for detecting the trailing edge of the newspaper, the two films are welded and cut at the trailing edge and the leading edge with a welding cutting blade, and both end welding mechanisms are used. So we welded both ends, and completed the sealed packaging with this newspaper with two films,
This sealed packaged finished product is discharged from the newspaper packaging device by this transport mechanism,
At that time, the welding of these both side ends is performed by pressing the side welding blades heated by the side welding blade heaters of the side welding blades to the side cradles on both sides.
It relates to the above method.

The present invention further provides:
Newspaper or a bundle of similar paper sheets, weekly magazines, and home delivery papers are made of two thin plastic-made newspaper wrapping films consisting of a lower film and an upper film, with the tips welded together. A newspaper packaging device for hermetically wrapping, in which case the newspaper packaging device is
It has an insertion sensor that detects when this newspaper is inserted,
According to the detection signal of the insertion sensor, the newspaper and the two films are transported.
According to the detection signal of the stop sensor, these two films are welded and cut at the rear end and the front end with a welding cutting blade, and welded at both ends with both end welding mechanisms. The stop sensor for detecting the trailing edge of the newspaper,
At that time, the end welding mechanism on both sides is
Side welding blades, heaters for side welding blades for heating these side welding blades, and temperatures for detecting the temperatures of these side welding blade heaters adhered to these side welding blade heaters Consisting of a sensing element and a side cradle, and
The present invention relates to the newspaper packaging apparatus of the type having an electric control device for electrically controlling all processing operations of the newspaper packaging apparatus.

  A packaging device for sealing and sealing a newspaper with a thin film, which can be used to prevent the newspaper from getting wet when it is delivered on a rainy day, is disclosed in, for example, Japanese Patent Laid-Open No. 2001-171607 ( It is known from US Pat. In this packaging apparatus, after the articles to be packaged are inserted between two thin long films made of synthetic resin whose front ends are welded to each other, both sides and rear ends of these films are welded and welded. It includes an enclosing mechanism that seals and seals an article to be packaged by separating the ends, a transport mechanism that feeds an article to be packaged and sends it out after packaging, and an electronic control unit that electrically controls all processing operations.

However, with this device, it is possible to completely seal the newspaper, but on the other hand, when trying to view the newspaper, this packaging bag is torn because it is completely welded at the four end faces, Therefore, after taking out the newspaper, the shape as a bag cannot be maintained normally, and as a result, it has been discarded.
JP 2001-171607 A

Therefore, starting from this known technique, the problem underlying the present invention is:
It is intended to provide a method and apparatus for producing a newsprint packaging bag that can be reused as a garbage bag or the like, however, allows for a good newsprint packaging condition in the rain.

This task is in accordance with the present invention.
One end of both ends is welded in a completely fused state, and the other end is welded in a semi-fused state so as not to damage the two newspaper packaging films in the peeling process when the newspaper is taken out. It is solved by doing.

Furthermore, this problem is in accordance with the present invention,
When one end welding mechanism of both end welding mechanisms welds one end in a completely fused state, and the other end welding mechanism takes out the other end of the newspaper. In the peeling process, the two newsprint packaging films are welded in a semi-fused state to such an extent that they are not damaged.

  Other advantageous configurations according to the invention are described in the dependent claims.

  According to the present invention, a newspaper packaging bag that can be reused as a garbage bag or the like, however, can be provided in a sufficient newspaper packaging state when it rains.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. In each of the following drawings, only those necessary for the description of the present invention are shown, and the other components are well known as a packaging device that hermetically seals newsprint with a thin film, and thus description thereof is omitted.

  FIG. 1 is a schematic partial side view of a newspaper packaging apparatus according to the present invention. This figure shows a state in which newspaper 3 having a standard newspaper length ln is wrapped with newspaper packaging film 1, that is, upper and lower upper film 12 and lower film 11. The newspaper 3 is introduced into the transport mechanism 4 after passing through the guide plate 2 and then the welding cutting blade K and the receiving table R. The newspaper 3 is packaged between the front welded portion T of the package that has been welded and cut last time and the portion that is welded and cut this time. With the tip welded portion T, the upper film 12 and the lower film 11 are welded.

  The lower film 11 is led from the lower film roll 11a through the lower auxiliary roller 7 to a welding cutting portion where the welding cutting blade K and the receiving base R are provided. The upper film 12 is led from the upper film roll 12a via the upper auxiliary roller 10 to the welding cutting portion where the welding cutting blade K and the cradle R are similarly provided.

An insertion sensor S1 for detecting the insertion time of the newspaper 3 is disposed on the front side in the conveying direction of the welding cutting blade K. A stop sensor S <b> 2 that detects the rear end of the newspaper 3 is disposed behind the welding cutting blade K in the conveying direction. Subsequently, a transport mechanism 4 that transports the newspaper 3 and the two upper and lower films 11 and 12 together is provided. A discharge sensor S <b> 3 that detects the discharge of the newspaper 3 is disposed behind the transport mechanism 4. The arrangement position and order of these sensors in the transport direction, and the arrangement position in the lateral direction can be appropriately determined depending on the control method and the structure. In this embodiment, a horizontal newspaper wrapping apparatus is shown as the transport system, but it goes without saying that the transport system can also be used in a vertical newspaper wrapping apparatus (for example, JP-A-11-70913 (Patent Document 2)). Yes.
JP-A-11-70913

  FIG. 2 is a schematic partial front view seen from the discharge side of the newspaper packaging apparatus according to the present invention. As can be seen from this drawing, the newspaper packaging apparatus of the present invention further includes both end welding mechanisms U1 and U2 for welding the left and right side end welding parts Y1 and Y2. The end welding mechanisms U1 and U2 on both sides are side welding blades KS1 and KS2, and side welding blade heaters H1 attached to the side welding blades for heating the side welding blades, H2 and temperature detection elements TH1 and TH2 for detecting the temperatures of the side welding blade heaters H1 and H2 which are closely attached to the side welding blade heaters H1 and H2, and side receiving bases D1 and D2. . The left and right side end welded portions Y1 and Y2 that are parallel to the conveying direction are fused by the end welded mechanisms U1 and U2 on both sides. This newspaper wrapping apparatus further controls the welding and cutting of the rear end and the front end, the end welding mechanism on both sides, the transport mechanism, and the like by the cooperation of the sensors S1 to S3, and the semi-melting according to the present invention. It has an electric control device 6 having an electronic control unit capable of controlling the wearing, and other components (not shown) of other conventionally known newspaper packaging devices.

  FIG. 3 is a side view of the end welding mechanism U2. The end welding mechanism U1 is symmetrical and has the same structure. Due to the rotational movement of the crank disk 20, the side welding blade KS2 is raised and lowered via the interlocking plate pieces 22a and 22b connected by the bearing 21. Here, these interlocking plate pieces 22a and 22b are fixed by a fixing screw 24 passing through the long hole 23, and form a pressing force adjusting device KP described below.

According to the present invention, one end portion of both end portions is welded in a completely fused state, and the other end portion is half-stripped so as not to damage the two newspaper packaging films in the peeling process when the newspaper is taken out. In order to weld in the fused state,
Side welding blades KS1 and KS2 of the side welding blades KS1 and KS2 on both sides are welded so that one side welding blade KS2 has a lower temperature than the other side welding blade KS1. In order to adjust the heating with the heater H2, the adjusting resistor HR is attached to the temperature detection element TH2 which is adhered and adhered to the side welding blade heater H2 which is set to a lower temperature.
This full fusion and semi-fusing operating conditions are, in an advantageous embodiment,
In the case of a 10 μm thick polyethylene film,
Full fusion 150-153 ° C (Fusion time 20-50msec)
Semi-fused 135-138 ° C (fused time 20-50ms)
It is.

  FIG. 4 shows a block circuit diagram of a part of the control system according to the present invention. Detection signals of the temperature detection elements TH1 and TH2 directly attached to the side welding blade heaters H1 and H2 attached to the side welding blades KS1 and KS2 are introduced into the filter amplifiers AS1 and AS2, respectively. The analog target control signal Sref obtained by converting the analog target control signal preset and stored in the electronic control unit by the digital / analog converter D / A is introduced to the comparators CP1 and CP2, where these filter amplifiers AS1 A comparison is made with the output signals Ses1 and Ses2 of AS2. In response to the deviation signal of the comparison result, the trigger pulse generators IP1 and IP2 form an ignition pulse having a desired output rate, and the switching elements TR1 and TR2 for the heating elements H1 and H2 of the side welding blades KS1 and KS2. The switching elements TR1 and TR2 are fired according to the output rate at that time, and the temperatures of the side welding blades KS1 and KS2 are controlled to the target temperature. In the newspaper packaging apparatus of the present invention, the adjustment resistor HR is attached to the temperature detection element TH2 on one side. This adjustment resistor HR compensates for the low temperature signal of the temperature detection element TH2 introduced into the filter amplifier AS2, and the side target control signal remains the same on both sides, while the one side welding blade KS2 is the same. However, the temperature is controlled to be lower than that of the other side welding blade KS1.

  In an advantageous embodiment, the adjustment resistor HR has a manual switch ES for manually switching the fused state in order to easily switch between the completely fused state and the semi-fused state of the welded portions. Is provided.

  In a further advantageous embodiment, it is possible to replace the manual switch ES with a relay RL and automatically adjust or switch the fusion state according to a signal from the electronic control unit. Furthermore, an independent side fusion target control signal can be output from the electronic control unit to automatically adjust or switch the fusion state.

  Further, in order to weld the welded portion in a semi-welded state, one side welding blade KS2 of the side welding blades KS1 and KS2 of both end welding mechanisms U1 and U2 is used as the other side welding blade. A pressing force adjusting device KP can be attached to the side welding blade KS2 on which the cradle is pressed more weakly so that the cradle is pressed more weakly than KS1 (see FIG. 3). ). When the interlocking plate pieces 22a and 22b are fixed with the fixing screws 24 passing through the long holes 23, the pressing force adjusting device KP adjusts the entire length of the interlocking plate pieces with the long holes. It is possible to adjust the pressing of the side welding blade to the side.

  FIG. 5 is a view in which a heat-resistant synthetic material film FK is placed on a side welding blade that is welded in a semi-fused state. As shown in this figure, in order to weld the welded portion in a semi-welded state, one side welding blade KS2 of the side welding blades KS1 and KS2 of the end portion welding mechanisms U1 and U2 on both sides is attached. It is possible to cover the heat-resistant synthetic material film FK with low heat conductivity that can be attached and detached.

  Advantageously, on one or both of the surfaces where the two films 11 and 12 are joined, the side end welded portion Y2 that is welded in a semi-fused state is subjected to a surface treatment that makes it difficult to weld. On the other hand, it is possible that the surface of the side end welded portion Y1 that welds the welded portion in a completely fused state is not subjected to surface treatment that makes it difficult to weld. The surface treatment that makes the welding difficult can be a surface treatment that is performed in order to prevent the printed graphic pattern from being peeled off.

  Further advantageously, when the two newsprint packaging films 1 are welded on both side ends by the end welding mechanisms U1 and U2 on both sides, the side end welds Y2 are welded in a semi-fused state, The distance W2 to the side edge FS2 of one newspaper packaging film 1 is welded so as to be longer than the distance W1 from the side edge welded portion Y1 in the completely welded state to the side edge FS1 of the other newspaper packaging film. Is possible. By doing in this way, even if this semi-fusion part peels off partly during delivery, the effect that rainwater cannot enter easily is acquired (refer to Drawing 2 and 6).

  In addition, a cautionary note that allows the welded side welded in the semi-fused state to be visually identified, for example, “Open here”, is printed on the welded side welded in the semi-fused state at the same time as the graphic pattern is printed. It is possible. (Fig. 6)

1 is a schematic partial side view of a newspaper packaging apparatus according to the present invention. It is the schematic partial front view seen from the discharge | emission side of the newspaper packaging apparatus by this invention. It is a side view of an edge part welding mechanism. It is a block circuit diagram of a part of a control system. It is the figure which put the heat-resistant synthetic material film on the side part welding blade welded in a semi-fusion state. It is the figure of the completed newspaper packaging bag.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Newspaper packaging film 2 Guide board 3 Newspaper 4 Conveying mechanism 6 Electric control device 7 Lower side auxiliary roller 10 Upper side auxiliary roller 11 Lower side film 11a Lower side film roll 12 Upper film 12a Upper film roll 20 Crank disc 21 Bearing 22a, 22b Interlocking plate piece 23 Long hole 24 Fixed screw AS1, AS2 Filter amplifier AS1, AS2
CP1, CP2 Comparator D1, D2 Side cradle D / A Digital / analog converter ES Manual switch FS1, FS2 Side end FK Heat-resistant synthetic film G1, G2 Gate H1, H2 Side welding blade heater HR Adjusting resistor IP1, IP2 Trigger pulse generator K Welding cutting blade KP Pressure adjusting device KS1, KS2 Side welding blade ln Standard newspaper length R Receptacle S1 Insertion sensor S2 Stop sensor S3 Discharge sensor Ses1, Ses2 Output signal Sref Analog target control signal T Tip welded part TH1, TH2 Temperature detection element TR1, TR2 Switching element
U1, U2 end welding mechanism W1, W2 spacing Y1, Y2 side end welding

Claims (6)

Newspaper or a bundle of newspapers, weekly magazines, and home delivery papers are sealed and packaged between two thin, long plastic packaging films made of synthetic resin with the tips welded together. A method for operating a packaging device,
The insertion time of this newspaper is detected by the insertion sensor,
In response to this signal, this newspaper and the transport device for transporting these two films are started and transported together.
After detecting the trailing edge of the newspaper by a stop sensor for detecting the trailing edge of the newspaper, the two films are welded and cut at the trailing edge and the leading edge with a welding cutting blade, and both end welding mechanisms are used. So we welded both ends, and completed the sealed packaging with this newspaper with two films,
This sealed packaged finished product is discharged from the newspaper packaging device by this transport mechanism,
At that time, the welding of these both side ends is performed by pressing the side welding blades heated by the side welding blade heaters of the side welding blades to the side cradles on both sides.
In the above method,
One end of both ends is welded in a completely fused state, and the other end is welded in a semi-fused state so as not to damage the two newspaper packaging films in the peeling process when the newspaper is taken out. A method for newspaper packaging, characterized by:   In order to weld the welded portion in a semi-welded state, one side welding blade of the side welding blades of the end welding mechanisms on both sides has a lower temperature than the other side welding blade. The method according to claim 1, wherein the heating is performed with a side welding blade heater. The method according to claim 2, wherein the fusion state is manually switched by a manual switch. The newspaper (3) or the newspaper packaging film (1) consisting of two thin synthetic resin-made thin lower films (11) and an upper film (12) with their tips welded to each other. A newspaper wrapping device for hermetically wrapping bundles of similar paper sheets, weekly magazines, and parcel delivery paper.
It has an insertion sensor (S1) for detecting the insertion time of this newspaper (3),
It has a transport device (4) for transporting the newspaper (3) and the two films (11, 12) by the detection signal of the insertion sensor,
According to the detection signal of the stop sensor (S2), these two films are welded and cut at the rear end and the front end by the welding cutting blade (K), and the end welding mechanisms (U1, U2) on both sides. The stop sensor (S2) for detecting the rear end of the newspaper (3), on which both end portions are welded,
At that time, these two end welding mechanisms (U1, U2)
Side welding blades (KS1, KS2), side welding blade heaters (H1, H2) for heating these side welding blades, and these side welding blades adhered to these side welding blade heaters A temperature detection element (TH1, TH2) for detecting the temperature of the heater for the heater, and a side cradle (D1, D2), and
In the newspaper wrapping apparatus of the style having an electric control device (6) for electrically controlling all processing operations of the newspaper wrapping apparatus,
One end welding mechanism (U1) of both end welding mechanisms (U1, U2) welds one end in a completely fused state, and the other end welding mechanism (U2). However, the other end portion is configured to be welded in a semi-fused state to the extent that the two newspaper packaging films (1) are not damaged in the peeling process when taking out the newspaper (3).
A newspaper packaging apparatus characterized by that.   5. The newspaper packaging apparatus according to claim 4, wherein an adjustment resistor (HR) is attached to the temperature detection element (TH2) that is closely attached to the side welding blade heater (H2). 6. The newspaper packaging apparatus according to claim 5, wherein the adjustment resistor (HR) is provided with a manual switch (ES) for manually adjusting or switching the fused state.

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