JP2004210379A - Newspaper packaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the strength of a welded part of a polyethylene sheet, and to make it uniform. <P>SOLUTION: Two sheets of top and bottom polyethylene films 211U and 211D at the rear side of newspapers 800 are welded under a stopped state by pressing a welding heater 410 to a welding position. The welding is performed between the top and the bottom while the pressed part is prevented from being cut off, and also, the temperature and the pressing time of the welding heater 410 are set in such a manner that the pressed part may be raised before and behind the welding heater 410. In the case of the polyethylene film, it is set to be 80 to 150 ms at 130 to 148°C. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a newspaper wrapping device, and more particularly to a newspaper wrapping device that wraps a newspaper delivered in rainy weather or the like so as not to get wet with rain.
[0002]
[Prior art]
In the case of rainy weather, in order to prevent the newspaper to be delivered from getting wet with rain, as shown in FIGS. 5A and 5B, the newspaper should be wrapped around a polyethylene film (211U, 211D). Has become commonplace. The newspaper packaging has a structure in which a newspaper 800 is sandwiched between two upper and lower polyethylene films 211U and 211D by a newspaper packaging device, and the front and rear, left and right sides are welded in the transport direction.
[0003]
In a newspaper wrapping apparatus that performs such wrapping, a polyethylene film wider than the width of the newspaper is supplied from two upper and lower polyethylene film rolls, and the newspaper is inserted between them, and the operation of welding the front, rear, right and left is sequentially repeated. The welding on the left and right may be performed only by the welding operation, but the welding before and after must be separated at this welded portion.
[0004]
A conventional example of such a newspaper wrapping apparatus will be described mainly with respect to the welding and cutting means before and after the apparatus (the welding means on both the left and right sides are omitted).
FIG. 6 is a block diagram showing an example of a conventional newspaper packaging apparatus, FIGS. 7A to 7E are side views for explaining the newspaper packaging operation, and FIG. 8 is an operation timing diagram thereof.
[0005]
This newspaper packaging apparatus is roughly divided into a newspaper insertion unit 100 for inserting a newspaper 800 between upper and lower polyethylene films 211U and 211D, a film supply unit 200 for supplying a polyethylene film so as to sandwich the newspaper 800 from above and below, Sensors 310 and 320 for detecting the passage of the newspaper 800 and controlling the welding position of the polyethylene film, a film welding portion 400x for welding the upper and lower polyethylene films 211U and 211D, and upper and lower polyethylene that wraps the newspaper 800. And a transport section 500x that transports the film by separating the film at the welded portion, and the details thereof are as follows.
[0006]
The film supply unit 200 includes a polyethylene film roll 210U that supplies an upper polyethylene film 211U and a polyethylene film roll 210D that supplies a lower polyethylene film 211D, and is provided between the upper and lower polyethylene films 211U and 211D. The newspaper 800 supplied and inserted from the newspaper insertion unit 100 is inserted. The upper and lower polyethylene films 211U and 211D have already been welded to the front by the welding operation performed before this newspaper packaging.
[0007]
The film welding unit 400x includes a welding heater 410 and a receiving stand 420 that sandwich the upper and lower polyethylene films 211U and 211D from above and below, and a heater elevating control unit 430x that controls the welding heater 410 to move up and down with respect to the receiving stand 420. And a heater heating control unit 440x for heating the welding heater 410 to control the temperature thereof. The sensor 310 is arranged in front of the welding heater 410 and the receiving stand 420, and the sensor 320 is arranged in the rear.
[0008]
A transport path 510 is disposed behind the sensor 320, and the transport operation of the transport path 510 is controlled by a transport control unit 520x. The transport path 510 and the transport control section 520x constitute a transport section 500x.
[0009]
Next, the operation of the newspaper packaging apparatus will be described.
First, a newspaper 800 to be packaged is inserted from the newspaper insertion section 100 between the upper and lower polyethylene films 211U and 211D (FIG. 7A). Then, the leading edge of the newspaper 800 is detected by the sensor 310, and the transport path 510 starts the transport operation by the transport control unit 520x, and transports the newspaper 800 sandwiched between the polyethylene films 211U and 211D forward, and the sensor 320 When the trailing end of the newspaper 800 is detected, the transport path 510 stops (FIG. 7B).
[0010]
At the same time as the conveyance path 510 stops, the welding heater 410 is lowered by the heater raising / lowering control unit 430x, and the upper and lower polyethylene films 211U and 211D are pressed against the receiving table 420, so that the polyethylene films 211U and 211D are welded ( FIG. 7 (c)). The temperature at the time of welding is set at 180 to 210 ° C. for the purpose of shortening the packaging processing time including welding and cutting of the polyethylene films 211U and 211D, and the welding time is about 60 ms (50 to 70 ms). (FIG. 8).
[0011]
When the welding operation is completed, the welding heater 410 is raised to move the conveyance path 510 when the temperature of the welded portion slightly decreases (the time during this period is about 35 ms (FIG. 8)), and the welded portion is cut off (FIG. 7 ( d)), the packaging of the newspaper 800 is completed (FIG. 7E). (For example, see Patent Document 1)
[0012]
[Patent Document 1]
Japanese Patent No. 2704941 (FIG. 1)
[0013]
[Problems to be solved by the invention]
For the purpose of shortening the packaging processing time, the above-described conventional newspaper packaging apparatus sets the welding temperature by the welding heater 410 to a relatively high temperature of 180 to 210 ° C., and sets the welding time to about 60 ms to increase and decrease The polyethylene films 211U and 211D are welded, and then, after about 35 ms, the conveying path 511 is moved to separate the welded portion, and since the welding temperature is set high, polyethylene is used. When the melting speed of the film is increased and the time for pressing the welding heater 410 is increased, the melting proceeds too much and the welding is broken without sufficient welding. Small, thin lines, insufficient welding strength can be obtained, and some parts are not welded. Torn result, there is a problem that, also, in either case, welding uneven when cutting after welding, was sometimes would be cut at a position different from the welding position.
[0014]
SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, an object of the present invention is to form a relatively large bulged portion before and after a welding heater in a welded portion, thereby increasing the strength of the welded portion and making it uniform. Another object of the present invention is to provide a newsprint packaging apparatus that can clarify a cutting position so as to be surely cut at a welding position and eliminate breakage during transportation and delivery.
[0015]
[Means for Solving the Problems]
The newspaper packaging device of the present invention sandwiches the newspaper between the upper and lower two synthetic resin films, welds the front and rear, the left and right, and the upper and lower sides so that the newspaper to be delivered is not wet by rain, and cuts off at the welded portion. What is claimed is: 1. A newspaper wrapping apparatus which sequentially and repeatedly performs a conveying operation, wherein a welding heater is pressed against welding portions of the upper and lower two synthetic resin films in a stopped state while the welding of the two upper and lower synthetic resin films is stopped. The temperature and pressing time of the welding heater are set so that the two upper and lower synthetic resin films of the pressed portion are welded without being cut, and rise before and after the welding heater, The conveyance is restarted after the pressing time, and the welding heater is separated at the pressed portion.
[0016]
Further, the synthetic resin film is a polyethylene film, the temperature of the welding heater is set to 130 to 148 ° C., and the pressing time is set to 80 to 150 ms.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
In one embodiment of the present invention, the newspaper to be delivered is sandwiched between the two upper and lower synthetic resin films, and the front and rear, the left and right are welded between the upper and lower portions so that the newspaper to be delivered is not wet by the rain, and separated at the welded portion. A newspaper wrapping apparatus that sequentially repeats the operation of transporting the upper and lower synthetic resin films by pressing a welding heater on the welding portions of the upper and lower two synthetic resin films in a stopped state while stopping the welding of the two upper and lower synthetic resin films. The temperature of the welding heater and the pressing time are set so that the two upper and lower synthetic resin films of the pressed portion are welded without being cut and swell before and after the welding heater. After the pressing time, the conveyance is restarted and the welding heater is separated at the pressed portion.
[0018]
When the synthetic resin film is a polyethylene film, the temperature of the welding heater is set to 130 to 148 ° C., and the pressing time is set to 80 to 150 ms.
[0019]
By adopting such a configuration and operation, welding is performed at a relatively low temperature for a relatively long time, so that a synthetic resin (polyethylene) has a relatively large width before and after the welding heater. Is formed and the strength of the portion is increased, and at the same time, the welded portion is not cut by the welding heater, the welded portion is made uniform, and the welded portion is damaged when transporting and delivering the packaged newspaper. Can be eliminated.
[0020]
【Example】
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side block diagram showing one embodiment of the present invention, FIGS. 2A to 2E are side views shown in the order of operation for explaining the operation, and FIG. 3 shows a welding state by the welding heater. FIG. 4 is an enlarged side view, and FIG. 4 is a timing chart for explaining the operation.
[0021]
This embodiment is different from the conventional newspaper packaging apparatus shown in FIGS. 6 to 8 in that the welding temperature of the polyethylene films 211U and 211D by the welding heater 410 is conventionally 180 to 210 ° C. On the other hand, in this embodiment, the temperature is set as low as 130 to 148 ° C., and the welding time is set as long as 80 to 150 ms in the present embodiment, whereas the welding time is conventionally 50 to 70 ms. , The portions of the upper and lower polyethylene films 211U and 211D which are in contact with the welding heater 410 are welded without being cut, and have a relatively wide width before and after the welding heater 410. The point is that the swells 212F and 212B are formed.
[0022]
Therefore, even after the welded portion is cut off, the strength is increased by the protrusions 212F and 212B, and the cuts are orderly and uniform, so that when the packaged newspaper 800 is transported or delivered, the welded portion is formed. The newspaper 800 being transported and delivered can be protected from rainwater and the like without being damaged.
[0023]
Further, since it is not necessary to lower the temperature of the welded portion after the welding, the portion can be immediately transported and cut (at about 2 ms), and as shown in FIG. The operation time can be suppressed to about 865 ms, and can be performed without much difference from the conventional example of 850 ms.
In addition, the synthetic resin film of the present invention may be, in addition to polyethylene, a polyolefin-based resin such as polypropylene and other resin films generally used for packaging, and a film obtained by adding an additive such as calcium carbonate to these resins may be used. it can. At this time, the temperature and pressing time of the welding heater are set so that the pressed portion of the applied film is welded up and down without being cut, and rises before and after the welding heater.
[0024]
【The invention's effect】
As described above, according to the present invention, the newspaper to be packaged is inserted between the upper and lower synthetic resin films and stopped, and the welding behind the newspaper is welded to the welding portions of the two synthetic resin films. By pressing the heater, the temperature of the welding heater and the pressing time are set so that the two synthetic resin films of the pressed portion are welded without being cut, and swell before and after the welding heater. After the pressing time, the conveyance is resumed and cut off at the welded portion, so that the welding is performed at a lower temperature for a relatively long time. Before and after the contact, a portion in which the synthetic resin swells with a relatively wide width is formed, and the strength of the portion is increased, and at the same time, it is not cut by the welding heater, and is uniformed and packed. Luck , When the delivery, the welded portion is able to eliminate the damage, the packaged newspaper can be protected against rainwater, there is an effect that.
[Brief description of the drawings]
FIG. 1 is a side block diagram showing one embodiment of the present invention.
FIG. 2 is a side view illustrating an operation of the embodiment shown in FIG. 1 in order of operation.
FIG. 3 is a side view showing a welding state by a welding heater in the embodiment shown in FIG. 1;
FIG. 4 is a timing chart for explaining the operation of the embodiment shown in FIG. 1;
FIG. 5 is an external perspective view and a cross-sectional side view showing a state in which a newspaper is packaged with a synthetic resin film using a newspaper packaging device.
FIG. 6 is a side block diagram showing an example of a conventional newspaper packaging device.
FIG. 7 is a side view illustrating an operation of the newspaper packaging apparatus shown in FIG. 6 in order of operation.
FIG. 8 is a timing chart for explaining the operation of the newspaper packaging device shown in FIG. 6;
[Explanation of symbols]
100 Newspaper insertion unit 200 Film supply unit 210U, 210D Polyethylene film roll 211U, 211D Polyethylene film 212B, 212F Rise 250 Front welding unit 260 Rear welding unit 270, 280 Side welding unit 310, 320 Sensor 400, 400x Film welding unit 410 Welding Heater 420 Receiving stand 430, 430x Heater elevation control units 440, 440x Heater heating control units 500, 500x Transport unit 510 Transport paths 520, 520x Transport control unit 800 Newspaper

Claims (2)

In order to prevent the newspaper to be delivered from getting wet with rain, the newspaper is sandwiched between the upper and lower two synthetic resin films, welded before and after the left and right sides, and then vertically separated. In a packaging apparatus, a welding heater is pressed against the welded portions of the upper and lower two synthetic resin films in a stopped state to stop welding of the upper and lower two synthetic resin films to the rear of the newspaper. The temperature and pressing time of the welding heater are set so that the two upper and lower synthetic resin films are welded without being cut and rise before and after the welding heater, and the conveyance is resumed after the pressing time. Wherein the welding heater is separated at a portion pressed by the welding heater. The newspaper packaging device according to claim 1, wherein the synthetic resin film is a polyethylene film, the temperature of the welding heater is set to 130 to 148 ° C, and the pressing time is set to 80 to 150 ms.

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