JP2006001628A - Method for packaging newspaper, and device for executing this method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably and easily perform the shifting of a printing position on a film at a low cost. <P>SOLUTION: In newspaper packaging device which seals and packages newspapers 3 with two films of a film 11 on which a picture pattern is repeatedly printed, and a solid base film 12, the insertion point of the newspapers 3 is detected by an insertion sensor, and the newspapers 3 and these two films 11 and 12 are carried together by starting a carrying mechanism which carries the newspapers 3 and the films 11 and 12. Then, the rear end of the newspapers 3 is detected by a stop sensor which detects the rear end of the newspapers 3, and the end of a printing range identification mark is detected by a sensor which detects the printing range identification mark. When the printed film 11 is used while exceeding a specified length in a previous packaging process, in order to prevent the position for fusion-cutting the rear end from entering the printing range of the picture pattern in this packaging process, this device is constituted in such a manner that the shortage of the printed film 11 may be compensated by winding in the distal end T of the solid base film 12 by a specified length to the printed film 11 side based on the detected signals. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to two newsprint packaging films, a printing film in which graphic patterns are repeatedly printed at regular intervals in the longitudinal direction, and there is a plain blank portion between these graphic patterns, and a plain film on which nothing is printed. A method for operating a newspaper packaging device for hermetic packaging of newspapers, comprising:
At that time, a printing range identification mark that can identify the printing range of the graphic pattern is printed on the side of the printed film. The printing range identification mark is detected, the rear end welded cut, and both sides It relates to the above method in the manner of end welding.

The present invention further includes a printed film (11) in which graphic patterns are repeatedly printed at regular intervals in the longitudinal direction, and there are plain blank portions between the graphic patterns, and a plain film (12) in which nothing is printed. A newspaper packaging device for hermetically packaging newspaper (3) with two newspaper packaging films (1),
At that time, a printing range identification mark (M) that can identify the printing range of the graphic pattern is printed on the side of the printing film,
The printing range identification mark (M) is detected, and rear end welding cutting with the welding cutting blade (K) and both side end welding with both side end welding mechanisms are performed. Relates to the above-mentioned 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 the newspaper is delivered on a rainy day, is disclosed in, for example, JP-A-8-143010 ( Patent Document 1) and Japanese Patent Application Laid-Open No. 2001-171607 (Patent Document 2). In these packaging apparatuses, a newspaper is manually inserted into the inlets of these apparatuses, and after insertion, a mechanism for automatically transporting the newspaper in a substantially horizontal direction along with two thin films on the upper and lower sides, and both sides of these films A mechanism is employed in which the end and the rear end are welded, and the welded rear end is automatically cut.

  The above packaging device is based on the premise that a plain film of plastics material is used up and down. However, recently, there has been an increasing demand for packaging newspapers with a graphic pattern of a specific design and / or a film printed with specific characters and numbers. In the conventional newspaper wrapping apparatus as described above, the printed film such as a graphic pattern is stopped at the time of detecting the rear end of the newspaper, regardless of the printing position, and is cut by welding. In some cases, the printed portion is welded and cut, and as a result, the printing ink adheres to the welding and cutting blade, which requires frequent cleaning of the blade. In order to avoid frequent cleaning of the blade, at present, printing of light colors with a reduced amount of ink is forced. Recently, however, printing with improved commercial properties has been demanded on these newspaper packaging films, and accordingly, darker color printing with good visibility has been demanded.

In order to solve this problem, graphic patterns are repeatedly printed at regular intervals in the longitudinal direction of the film, solid blank portions are provided between these graphic patterns, and a position mark indicating the position of this graphic pattern is detected. Japanese Laid-Open Patent Publication No. 2001-225807 (Patent Document 3) proposes a method for correcting the relative positional relationship between newspaper and printed film by the displacement of the position mark. This method compensates for a change in the newspaper length ln due to an error when the newspaper 3 is folded in four, and a change in the length of the newspaper due to the protrusion of a leaflet inserted in the newspaper 3, thereby keeping the relative position of the film and the newspaper constant. The relative position of the films with respect to the newspaper is adjusted by upper and lower drive mechanisms that can move the films independently. However, this mechanism has the disadvantages that when these films are returned, the films are likely to be wrinkled and the identification marks are easily misread, and the mechanism is complicated and expensive.
JP-A-8-143010 JP 2001-171607 A JP 2001-225807 A

  Therefore, starting from this known technique, the problem that forms the basis of the present invention is that a graphic pattern is repeatedly printed at regular intervals in the longitudinal direction, and there is a printing film having a plain blank portion between these graphic patterns. In a method for operating a newspaper wrapping apparatus for sealing and wrapping newsprint with two newsprint wrapping films of plain film which is not printed, the change in the length of the newsprint due to an error when the newspaper is folded in four, By improving the compensation for the change in the newspaper length due to the protrusion of the leaflet inserted in 3, that is, the change in the apparent length of the newspaper, in a more stable, simpler and cheaper way. is there. A further object of the present invention is to provide a newspaper packaging apparatus for carrying out such a method.

This task is in accordance with the present invention.
Graphic paper is printed on two newspaper packaging films, a graphic film on which a graphic pattern is repeatedly printed at regular intervals in the longitudinal direction, and a blank film between the graphic pattern and a plain film on which nothing is printed. A method for operating a newspaper packaging device for hermetically wrapping comprising:
At that time, a printing range identification mark that can identify the printing range of the graphic pattern is printed on the side of the printed film. The printing range identification mark is detected, the rear end welded cut, and both sides In the above method, in the manner of welding the ends,
The insertion sensor detects the time of newspaper insertion,
By this signal, the newspaper and the transport mechanism for transporting these two films are activated and transported together.
Detecting the trailing edge of the newspaper by a stop sensor for detecting the trailing edge of the newspaper, and detecting the end of the printing range identification mark by the printing range identification sensor for detecting the printing range identification mark indicating the printing range of the graphic pattern;
Based on these detected signals,
In the previous packaging process, if the printed film was used within the range of the specified length, after the end of the printing range identification mark was detected in this packaging process, the rear end Weld and cut
On the other hand, when the printing film is used beyond the predetermined length in the previous packaging process, the position where the rear end welding and cutting is not included in the printing range of the graphic pattern in this packaging process. Therefore, the shortage of the printing film is solved by replenishing the plain film with a predetermined length of the plain film by winding the tip of the plain film on the printing film side.

Furthermore, this problem is in accordance with the present invention,
Graphic paper is printed on two newspaper packaging films, a graphic film on which a graphic pattern is repeatedly printed at regular intervals in the longitudinal direction, and a blank film between the graphic pattern and a plain film on which nothing is printed. A newspaper packaging device for hermetically wrapping,
At that time, a printing range identification mark that can identify the printing range of the graphic pattern is printed on the side of the printing film,
The newspaper wrapping of the above-described style is configured to detect the printing range identification mark and perform the rear end welding cutting with the welding cutting blade and the both side end welding with the both side end welding mechanism. In the device
Having an insertion sensor for detecting the time of newspaper insertion;
It has a transport mechanism for transporting both this newspaper and these two films by this signal,
Having a stop sensor to detect the trailing edge of the newspaper,
Having a print range identification sensor for detecting a print range identification mark indicating the print range of the graphic pattern;
In the previous packaging process, when the printing film is used beyond the specified length, this printing process is performed to prevent the position where the trailing edge is welded and cut from entering the graphic pattern printing range in this packaging process. Having a correction mechanism capable of replenishing the shortage of the film with a predetermined length of the plain film by revolving the plain film on the printed film side; and
Having an electric control device that controls the transport mechanism and the correction mechanism in cooperation with the stop sensor and the print range identification sensor;
Solved by.

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

  According to the present invention, two newsprint packaging films of a printing film in which graphic patterns are repeatedly printed at regular intervals in the longitudinal direction, and there are plain blank portions between these graphic patterns, and a plain film on which nothing is printed Thus, a method for operating a newspaper packaging apparatus for hermetic packaging of newspapers, and a newspaper packaging apparatus for implementing this method, are improved so that they can be implemented stably, simply and at low cost. These improvements to the apparatus according to the present invention are simply the addition of a print range identification sensor, an electromagnetic solenoid, a friction rubber belt, and an electrical control device for each existing newspaper packaging apparatus already sold and used in large quantities. There is an advantage that it can be done by a relatively slight upgrade work only by changing the above.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 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 plain films 12 and printing film 11. The newspaper 3 is introduced into the transport mechanism 4 after passing through the guide plate 2 and then the weld 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 plain film 12 and the lower print film 11 are welded. In the present invention, the following description will be given below in terms of the vertical relationship. However, the vertical relationship may be reversed, that is, the upper side may be the printing film 11 and the lower side may be the plain film 12. I want you to interpret it upside down. Further, in this embodiment, a horizontal newspaper wrapping apparatus is shown as the transport system, but the transport system can also be used in a vertical newspaper wrapping apparatus (for example, JP-A-11-70913 (Patent Document 4)). Needless to say.
JP-A-11-70913

  FIG. 2 illustrates a state in which the graphic pattern PT is repeatedly printed at regular intervals in the longitudinal direction, and the printing film 11 having a plain blank portion WT between these graphic patterns is fed from the printing film roll 11a. ing. These graphic patterns PT are repeatedly printed at a graphic pattern interval L1, and a graphic pattern printing range LP of these graphic patterns PT is indicated by LP. On at least one side of the print film 11, a print range identification mark M that can be identified as a print range of a graphic pattern is printed range identification mark length LM at a constant interval in the longitudinal direction as the graphic pattern PT. Therefore, it is printed repeatedly. In the embodiment of the present invention, the length of the printing range identification mark M is the same as the length of the graphic pattern printing range LP, but may differ depending on the control method and the arrangement of sensors described below. good. Further, the position of the printing range identification mark M with respect to the graphic pattern PT in the longitudinal direction on the printing film 11 is the same in the embodiment, but differs depending on the control method and the arrangement of sensors described below. May be. Further, the print range identification mark M is a continuous mark in the embodiment, but may be a series of periodic island marks depending on the control method. In this case, the pitch of the island marks is selected based on the control method. Further, the width of the printing range identification mark M and the distance from the film edge are appropriately determined in consideration of the performance of the printing range identification sensor S4 described below, arrangement, and meandering during film conveyance. In this embodiment, the width is 10 to 20 mm, and the distance from the film edge is 0 to 5 mm.

  FIG. 3 is a diagram schematically illustrating the correction mechanism of the present invention. In FIG. 3, only what is necessary for the following description is shown, and the other components are well known as a packaging device that hermetically seals newspaper with a thin film, and thus description thereof is omitted.

  A printed film 11 in which graphic patterns are repeatedly printed at regular intervals in the longitudinal direction, and a plain blank portion is present between the graphic patterns, is formed by welding cutting blades K and the lower auxiliary roller 7 from the printed film roll 11a. It is led to the welding cutting part in which the cradle R is provided. The printing film roll 11 a is placed on the lower roll shaft 8 and the auxiliary roll shaft 81 on the lower side. The plain film 12 on which nothing is printed is led from the plain film roll 12a via the upper auxiliary roller 10 to the weld cutting section where the welding cutting blade K and the receiving base R are similarly provided. The plain roll 12a is in contact with the upper roll shaft 9 from below. The printed film roll 11a and the plain film roll 12a are prevented from over-rotating due to inertial force after the film roll is drawn out by the lower roll shaft 8 or the upper roll shaft 9, respectively. Further, a friction rubber belt 55 is wound around the lower roll shaft 8, the friction rubber belt 55 is tensioned by an electromagnetic solenoid 54, and a friction rubber belt is wound around the upper roll shaft 9 in the same manner. The friction rubber belt is tensioned by an electromagnetic solenoid to perform a braking action.

  An insertion sensor S1 and at least one printing range identification sensor S4 are disposed on the front side in the transport direction of the welding cutting blade K. The insertion sensor S1 detects the insertion time of the newspaper 3, and the print range identification sensor S4 detects a print range identification mark M indicating the print range of the graphic pattern. The arrangement position of the printing range identification sensor S4 in the width direction of the newspaper packaging apparatus is determined in accordance with the position of the printing range identification mark M on the printing film 11. 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 transport direction. Subsequently, a transport mechanism 4 that transports the newspaper 3 and the two 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.

  A friction rubber belt 53 is wound around the lower auxiliary roller 7 in the same manner as described above, and the friction rubber belt is tensioned by an electromagnetic solenoid 52 to perform a braking action. The electromagnetic solenoid 52 and the friction rubber belt 53 are the brake mechanism 51 according to the present invention. When the print film 11 is used beyond the predetermined length in the previous packaging process, In the packaging process, in order to prevent the position where the rear end welding is cut from entering the printing range of the graphic pattern, the shortage of the print film 11 is set to a predetermined length of the plain film 12, and the plain film 12 is printed. A correction mechanism that can be replenished by winding the tip to the 11 side is configured.

Although not shown in detail in the newspaper wrapping apparatus of the present invention, the both sides end welding mechanism that performs welding at both ends and the cooperation between the stop sensor S2 and the print range identification sensor S4, An electric control device 6 (see FIG. 8) for controlling the correction mechanism and other components of a conventionally known newspaper packaging device are provided.
The brake mechanism 51 for braking the feeding of the printing film 11 is attached to the electromagnetic solenoid 54 and applies the friction force to the lower roll shaft 8 supporting the printing film roll 11a of the printing film 11. The friction rubber belt 55 may be used. In the embodiment of the present invention, the above-described brake action is performed by an electromagnetic solenoid and a friction rubber belt, respectively. However, these brake actions are not limited to this, and other brake mechanisms such as a motor and a brake plate can be used. Needless to say.

  FIG. 4 is a schematic flowchart showing the operation of the newspaper packaging apparatus for packaging the newspaper 3. First, a printed film 11 on which a graphic pattern is repeatedly printed at a predetermined interval in the longitudinal direction and a plain film 12 on which nothing is printed are placed by a worker in a known manner before the welding cutting blade K. Set. Next, the dummy newspaper 3 is inserted and further pushed into the transport mechanism 4, and transport is started by the transport mechanism 4 which has started driving by the insertion sensor S1. After detecting the end of the printing range identification mark M and transporting it for a predetermined length (la + ls), the newspaper packaging film 1, that is, the printing film 11 and the plain film 12, are welded and cut at the rear end, and the newspaper of this flowchart. The packaging is in a start state (that is, a plain blank portion between the graphic patterns is stopped at the position of the welding cutting blade K).

  The newspaper 3 to be packaged is inserted on the guide plate 2, and the insertion point is detected by the insertion sensor S1 by the passage of the front end of the newspaper 3. In response to this signal, the driving pulse motor of the transport mechanism 4 for transporting the newspaper 3 and the two films 11 and 12 is activated. Further, the pushed newspaper 3 and the films 11 and 12 are moved by the transport mechanism 4. Both are started to carry. Next, the stop area S2 for detecting the rear edge of the newspaper 3 detects the rear edge of the newspaper 3, and the print area identification sensor S4 detects the print area identification mark M indicating the print area of the graphic pattern. The end of the identification mark M is detected.

Based on the signals detected by these sensors and the timing pulse of the driving pulse motor, as a first method according to the present invention,
If it is determined in the previous packaging step that the printing film 11 has been used within a predetermined length, the predetermined length (after the end of the printing range identification mark M is detected in the current packaging step) After transporting only la + ls), the newsprint packaging film 1, that is, the printing film 11 and the plain film 12, is welded and cut at the rear end. This determination is made in the part (a) in FIG.
Here, the predetermined length of the printing film 11 is the graphic pattern interval L1 in FIG. 2, and ls is the distance from the end of the printing range identification mark M to the welding cutting position, and la is the welding cutting. This is the distance from the blade K to the print range identification sensor. These relationships are illustrated in FIG. LW is the printing part margin length. Further, FIG. 10 is a view of the state of FIG. 9 viewed from the side. This ls is advantageously set to a relatively small value in order to increase the margin length (LW-ls) in front of the conveyance direction, that is, the margin.
Further, the graphic pattern interval L1 is the standard newspaper length ln + the distance lm from the stop sensor S2 to the welding cutting blade K + the standard adjustment width ld, that is,
L1 = ln + lm + ld
It is.
This standard adjustment width ld compensates for variations such as a change in the newspaper length ln due to an error when folding the newspaper 3 in four, and a change in the newspaper length due to the extension of a leaflet inserted into the newspaper 3 by experiments or the like. Is set to a value. As a typical example, ln = 275 mm, lm = 20 mm, ld = 5-15 mm, and therefore L1 = 300-310 mm.
Furthermore, the case where the printing film is used within a predetermined length is within the range of L1. This determination is indicated by (A) in FIG. In this method 1, if the change in the newspaper length ln, the error in inserting and transporting the newspaper 3 into the newspaper packaging apparatus are within the standard adjustment width ld, and the apparent length of the newspaper 3 is the standard newspaper length If it is shorter than ln, the correction described below is not required.

On the other hand, when the standard adjustment width ld cannot be fully compensated, the following method is used according to the present invention.
In the previous packaging process, when the printing film 11 is used beyond the predetermined length, that is, the range of L1, in this packaging process, the position where the rear end welding is cut does not enter the printing range LP of the graphic pattern PT. In order to achieve this, the shortage of the printing film 11 is replenished by winding the leading edge of the plain film 12 toward the printing film 11 with a predetermined length of the plain film 12.

  The fact that the print film has been used beyond a predetermined length means that when the trailing edge of the newspaper 3 is detected by the stop sensor S2 that detects the trailing edge of the newspaper, the printing range identification sensor S4 determines the printing range of the graphic pattern. This determination is made when it is detected that the print range identification mark M shown after passing through the position of the rear end weld cutting blade K for rear end weld cutting. This determination is made in the part (a) in FIG.

  5 and 6 illustrate the state where the tip is caught. FIG. 5 is a view when the newspaper 3 is just inserted from above the guide plate 2, and FIG. 6 is a view showing a state in which the plain film 12 is wound around the printing film 11, and the tip welded portion T is printed. It can be seen that the film is shifted to the film 11 side. When the print film 11 is used beyond a predetermined length, that is, L1, the brake mechanism 51 brakes the feed of the print film 11 at a predetermined time interval from the time when the insertion sensor S1 is detected. The plain film 12 is wound on the side of the print film 11 by being fed more than the print film 11. The predetermined time interval for applying the brake is set in advance by an experiment or the like, and is, for example, a time of 100 to 200 ms. The printed film 11 is replenished by the plain film 12 by the leading edge winding.

  According to the present invention, the braking to the feeding of the printing film 11 is performed by applying a frictional force to the lower auxiliary roller 7 for changing the direction disposed in the middle of the feeding on the feeding side of the printing film 11. This frictional force is controlled by the electric control device 6 using an electromagnetic solenoid 52 and a friction rubber belt 53 wound around the lower auxiliary roller 7 attached thereto.

  FIG. 7 schematically shows a timing chart of each sensor, a conveyance motor that drives the conveyance mechanism 4, a welding cutting motor that operates the welding cutting blade K, a brake of the lower auxiliary roller 7, and the like. Since the basic operation has already been disclosed in Japanese Patent Application Laid-Open No. 2001-171607 (Patent Document 2) and Japanese Patent Application Laid-Open No. 2001-225807 (Patent Document 3) by the present applicant, it is not particularly described here. . The following points are important in the present invention.

  In this timing chart, at time A, when the print film has been used beyond a predetermined length, the print range identification sensor is detected when the rear edge of the newspaper 3 is detected by the stop sensor S2 that detects the rear edge of the newspaper. S4 is determined by detecting that the print range identification mark M indicating the print range of the graphic pattern has passed after the position of the rear end weld cutting blade K for cutting the rear end weld. If this state is left unattended and the packaging process in such a state continues several times, there arises a problem that the welded cut is applied to the graphic pattern printing range. In this case, in the next packaging step, it can be seen that the brake action is applied to the lower auxiliary roller when the insertion sensor S1 becomes “H”. At the time point B, the state at the time point A is canceled by the leading edge of the plain film 12 on the printed film 11 side, and the normal state, that is, the trailing edge of the newspaper 3 is detected by the stop sensor S2 that detects the trailing edge of the newspaper. At that time, the printing range identification sensor S4 returns to the state where the printing range identification mark M indicating the printing range of the graphic pattern has not yet passed through the position of the rear end welding cutting blade K where the rear end welding cutting is performed. Therefore, the above correction is not necessary. In this timing chart, the conveyance motor is actually stopped at the end of the printing range identification mark M because the printing range identification sensor S4 has a distance la upstream from the welding cutting blade K. And the timing of the printing range identification sensor S4 appear by (la + ls), which is the distance ls from the welding position to the welding cutting position. The installation order of these sensors S1, S2, and S3 can be different from the order shown in FIG. 3, in which case the timing in FIG. 7 will naturally change accordingly.

  FIG. 7 also shows a timing chart in the case where the brake is applied to the lower roll shaft 8 as another means and a timing chart of the brake of the upper roll shaft 9. When the stop sensor S2 of each packaging process is “L”, the brake operation of the lower roll shaft 8 and the upper roll shaft 9 becomes “H” because each film roll is excessively driven by inertia. This is to prevent rotation. When the brake of the lower roll shaft 8 is used for the correction according to the present invention, as indicated by the broken line, the brake is continuously applied for a predetermined time from the time when the insertion sensor S1 detects the insertion of the newspaper 3. It has been applied.

  FIG. 8 shows the friction rubber belt 53; 55 wound around the lower auxiliary roller 7 or the lower roll shaft 8 and the electromagnetic solenoid 53: 54 in the newspaper packaging apparatus in the embodiment of the present invention. The arrangement is shown.

  When packaging with the plain film 12 together on the upper and lower newspaper packaging films as usual, the printing range identification mark M is not detected at all by the printing range identification sensor S4 in the newspaper packaging apparatus according to the present invention. It is determined that it is not in the printing range, and the welding is cut without the above correction. Therefore, the newspaper wrapping apparatus according to the present invention can be used for both of these without any work such as switching by the operator.

It is the figure which showed the state which wraps the newspaper 3 which has the standard newsprint paper length ln with the newspaper packaging film 1, ie, the two plain films 12 on the upper and lower sides, and the printing film 11. FIG. It is a figure which shows the state by which the graphic pattern PT is repeatedly printed by the fixed space | interval in the longitudinal direction, and the printing film 11 with the plain blank part WT between these graphic patterns is drawn | fed out from the printing film roll 11a. It is the figure which illustrated schematically the correction | amendment mechanism of invention. 3 is a schematic flowchart showing an operation of a newspaper packaging apparatus for packaging newspaper 3. It is a figure at the time when the newspaper 3 is just inserted from the guide plate 2. It is a figure of the state which wound the plain film 12 to the printing film 11 side at the front-end | tip. FIG. 4 is a diagram schematically showing timing charts of each sensor, a conveyance motor that drives the conveyance mechanism 4, a welding cutting motor that operates a welding cutting blade K, and a lower auxiliary roller brake. It is the figure which showed arrangement | positioning of a friction rubber belt and an electromagnetic solenoid in a newspaper packaging apparatus. It is the figure which showed the relationship between the distance ls from the end of the printing range identification mark M to the welding cutting position, and the printing part margin length LW. It is the figure which looked at the state of Drawing 9 from the side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Newspaper packaging film 11 Printing film 11a Printing film roll 12 Plain film 12a Plain film roll 2 Guide plate 3 Newspaper 4 Conveyance mechanism 51 Brake mechanism 52 Electromagnetic solenoid 53 Friction rubber belt 54 Electromagnetic solenoid 55 Friction rubber belt 6 Electric control device 7 Lower auxiliary roller 8 Lower roll shaft 81 Auxiliary roll shaft 9 Upper roll shaft 10 Upper auxiliary roller K Welding cutting blade la Distance from welding cutting blade K to print range identification sensor ld Standard adjustment width lm Distance from stop sensor S2 to welding cutting blade K ln Standard newspaper length ls Distance from end of print range identification mark M to weld cut position L1 Graphic pattern interval LM Print range identification mark length LW Print section margin length LP Graphic pattern print range M Print range identification mark PT Graphic pattern Cradle S1 insertion sensor S2 stop sensor S3 discharge sensor S4 print area identifying sensor T tip welded portion WT margin

Claims (7)

Graphic paper is printed on two newspaper packaging films, a graphic film on which a graphic pattern is repeatedly printed at regular intervals in the longitudinal direction, and a blank film between the graphic pattern and a plain film on which nothing is printed. A method for operating a newspaper packaging device for hermetically wrapping comprising:
At that time, a printing range identification mark that can identify the printing range of the graphic pattern is printed on the side of the printed film. The printing range identification mark is detected, the rear end welded cut, and both sides In the above method, in the manner of welding the ends,
The insertion sensor detects the time of newspaper insertion,
By this signal, the newspaper and the transport mechanism for transporting these two films are activated and transported together.
Detecting the trailing edge of the newspaper by a stop sensor for detecting the trailing edge of the newspaper, and detecting the end of the printing range identification mark by the printing range identification sensor for detecting the printing range identification mark indicating the printing range of the graphic pattern;
Based on these detected signals,
In the previous packaging process, if the printed film was used within the range of the specified length, after the end of the printing range identification mark was detected in this packaging process, the rear end Weld and cut
On the other hand, when the printing film is used beyond the predetermined length in the previous packaging process, the position where the rear end welding and cutting is not included in the printing range of the graphic pattern in this packaging process. Therefore, a method for newspaper packaging, characterized in that the shortage of the printed film is replenished with a predetermined length of the plain film by wrapping the plain film on the printed film side.   The fact that the print film has been used beyond the predetermined length means that when the trailing edge of the newspaper is detected by the stop sensor that detects the trailing edge of the newspaper, the printing range identification sensor displays the printing range of the graphic pattern. 2. The method according to claim 1, wherein the determination is made when it is detected that the identification mark is after passing through the position of the rear end weld cutting blade for cutting the rear end weld.   If the print film is used beyond the predetermined length, the print film feed is braked for a predetermined time interval from the time when the insertion sensor is detected, so that the plain film is fed more than this print film. The method according to claim 1, wherein the plain film is wound on the front side of the printed film side.   The braking of the feeding of the printing film is performed by applying a frictional force to the lower auxiliary roller for changing the direction disposed in the middle of the feeding on the feeding side of the printing film. Method. Two newspapers, a printed film (11), in which graphic patterns are repeatedly printed at regular intervals in the longitudinal direction, and there is a blank space between these graphic patterns, and a plain film (12) in which nothing is printed A newspaper packaging apparatus for hermetically packaging newspaper (3) with a packaging film (1),
At that time, a printing range identification mark (M) that can identify the printing range of the graphic pattern is printed on the side of the printing film,
The printing range identification mark (M) is detected, and rear end welding cutting with the welding cutting blade (K) and both side end welding with both side end welding mechanisms are performed. In the above-mentioned newspaper packaging device,
Having an insertion sensor (S1) for detecting the insertion time of the newspaper (3);
It has a transport mechanism (4) for transporting the newspaper (3) and the two films (11, 12) together by this signal,
Having a stop sensor (S2) for detecting the trailing edge of the newspaper (3);
Having a print range identification sensor (S4) for detecting a print range identification mark (M) indicating the print range of the graphic pattern;
In order to prevent the position where the rear end welding and cutting is included in the printing range of the graphic pattern in this packaging process when the printing film (11) is used exceeding the predetermined length in the previous packaging process. And a correction mechanism capable of replenishing the shortage of the printed film (11) with the predetermined length of the plain film (12) and winding the plain film (12) toward the printed film (11). And
Having an electric control device (6) for controlling the transport mechanism and the correction mechanism in cooperation with the stop sensor (S2) and the printing range identification sensor (S4);
Newspaper packaging equipment characterized by.   6. The newspaper packaging according to claim 5, wherein the correction mechanism comprises a brake mechanism (51) for braking the feeding of the printing film (11) at a predetermined time interval from the time when the insertion sensor (S1) is detected. apparatus.   The brake mechanism (51) that brakes the feeding of the printing film (11) has a frictional force applied to the lower auxiliary roller (7) for changing the direction arranged on the feeding side of the printing film (11). The newspaper packaging apparatus according to claim 5 or 6, comprising an electromagnetic solenoid (52) and a friction rubber belt (53) attached thereto.

Images