JPH0379250B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing device for marking a packaging date and other information on a film sheet for packaging, such as a plastic bag for packaging.

In conventional printing devices of this type, the plastic packaging film that is being transported is stopped intermittently, and the markings are made by contacting the sheet film with printing during that time, or the sheet film is continuously transported. The print support is intermittently displaced in synchronization with the transport speed of the sheet film, and during this time the print is brought into contact with the sheet film to form a mark.

Therefore, in the former method in which the sheet film is transported intermittently, the feeding of the sheet film is slow, which reduces the packaging speed, and it is difficult to accurately stop the sheet film at the printing abutment position, making it difficult to make accurate markings. The drawback was that it was difficult to

In addition, with the latter method, it is difficult to synchronize the printing with the transport speed of the sheet film when marking, and if the transport speed of the sheet film and the printing are not accurately synchronized, the marks cannot be clearly marked. There was a drawback that there was no.

The present invention provides a printing device which does not have the drawbacks seen in the conventional devices, and which can feed a sheet film at high speed and accurately print clearly. The structure can be made extremely simple.

Hereinafter, the present invention will be specifically explained based on illustrated embodiments.

In Figures 1 and 2, F shows the plastic film being transferred to the packaging machine in the direction of the arrow, and E shows the plastic film being fed by printing tape from the unwinding reel to the take-up reel (none of which is shown). .
Reference numeral 1 denotes a frame, and a push shear bar 2 is fitted into the frame 1 so as to be able to slide vertically.A spring 3 is disposed between the flange 2' of the push shear bar 2 and the frame 1, and a spring 3 is installed to move the push shear bar 2 upward. is empowered.

A guide 4 is attached to the lower end of the push shear bar 2. The top of the heater holder 5 is received inside the guide 4, and a V-groove is cut on the side facing the guide 4, and a ball 6 is disposed in the groove. It can be smoothly displaced from side to side in the figure.

A heater 7 is attached to the heater holder 5, and a print holder 8 is attached to the lower end of the heater holder 5, and a print 9 for marking the vinyl film F is supported at the lower end of the holder 8.

On the other hand, the pin holder 10 is attached to the heater holder 5.
is attached, and two U-shaped pins 11 are fitted into this pin holder 10 at a distance.

A spring receiver 11' is attached to the pin 11, and a spring 1 is attached between the pin holder 10 and the spring receiver 11'.
2 is attached, and the pin 11 is biased downward.

A spring 14 is attached to the pin holder 10 and is pulled to the left in FIG. 1, that is, in a direction opposite to the direction in which the film F is transported. A stopper 13 comes into contact with the pin holder tensioned by a spring 14 to restrict its movement.

On the other hand, a pin receiver 15 is arranged below the pin 11, and the pin receiver 15 is attached to a slide 16. The slide 16 is received in a guide 17 as shown in FIG. It is slidable in the direction in which the film F is transported.

A spring 19 is attached to the left end of the slide to pull it to the left in FIG. 1, and its leftward movement is restricted by a stopper 20.

One end of a lever 22 whose central portion is pivoted by a pin 21 is pinned to the upper end of the pusher bar 2 described above, and a solenoid bar 23 is pinned to the other end of the lever 22.

Next, the operation of the above-described printing device will be explained.

In Fig. 1, a signal to activate the printing mechanism is obtained by detecting a mark printed in advance on the packaging film F, which is continuously fed in the direction of the arrow, using a phototube. This signal activates a solenoid (not shown) to displace the solenoid bar 23 in the direction of the arrow.

This movement is transmitted to the push shear bar 2 via the lever 22 as a downward movement. When the pusher bar 2 descends, the pin holder 10, heater holder 5, print 9, pin 11, etc. descend together with the guide 4 as one body.

Since the lower end of pin 11 is installed in a state that protrudes lower than the lower end of printing 9, first pin 11 is attached.
1 hits the printing tape E and the film F, and presses down the film F against the spring 12, as shown in FIG.

In this state, relative displacement of the film F together with the printing tape E between the pin 11 and the pin receiver 15 is prevented. Therefore, the pin 11, pin holder 10, and heater holder 5 are in a state where they are displaced together with the film F as the film F is transferred along the guide 4 due to the sliding action of the ball 6.

On the other hand, the pin receiver 15 and slide 16 are in a state where they are displaced together with the film F as the film F is transferred along the guide 17 due to the sliding action of the ball 18.

When the bar 23 of the solenoid is further raised, the pin 11 is further lowered against the spring 12, and eventually the print 9 presses the film F through the print tape E, and the mark 9 is made on the film F in a heated state. During this time, pin 11 and pin receiver 15 are attached.
As mentioned above, sandwich the film F and press the spring 1.
4, 19 and as the film F is transferred, the fifth
As shown in the figure, since they are displaced as one unit, there is no relative displacement between the print 9 and the film F, and accurate and clear marking is achieved.

When this clamping is carried out for a predetermined period of time, the excitation to the solenoid is released and the bar 23 is lowered, so that the pin 11 and the pin receiver 15 are separated and the engagement with the film F is released.

Therefore, the pin 11, pin receiver 15, etc. are held against the stoppers 13, 20 by the springs 14, 19, respectively.
It is returned to its original position. When the next actuation mark on film F arrives, the same marking operation as described above is repeated.

In the embodiment described above, when the film F is transferred horizontally and the print 9 etc. are displaced vertically and engaged with the film F and are transferred together, when the film F is released from the engagement, the springs 14, 19, but the film F
is moved vertically or diagonally upward, and after the print 9, etc. is carried upward or diagonally upward by the film F to mark it, when it is released from engagement, it falls back to its original position due to its own weight. It goes without saying that you may do as you like.

Further, the mechanism for displacing the pin 11 and the printing 9 may be any other suitable mechanism other than the one shown in the drawings, and
In addition to the above-mentioned method of printing using heating and printing tape, the printing method may also be an appropriate method such as a stamping method or a printing method.

In short, it is sufficient if the film F is held at predetermined intervals and transported as the film is transported in a state where relative displacement is prevented, and markings are made during this time.

For example, as shown in FIGS. 6 to 8, a film F to be marked by printing is transferred around a receiving roll 101, a printing holder 102 is disposed above the receiving roll 101, and a pin 103 is placed on the film F to be marked by printing.
pinned to one end of the lever 104 pivotally connected to the
This lever 104 is rotated by a bar 105. A print 106 is supported on the print holder 102 .

The print receiver 102 is moved closer to the receiver roll 101 by vertical movement of the bar 105, but the print holder 10
2 is brought close to the receiving roll, first, the periphery 102' of the print holder 102 comes into contact with the film F, and the film F is sandwiched between the film F and the receiving roll 101, and as the film F is transferred, the print holder 1
02 rotates around the pivot point with the lever 104.

Due to this rotation, the print 106 is moved together with the film F without any relative displacement therebetween, thereby marking the film F.

When marking is completed, the print holder 102 is lifted and returned to its original position, and waits until the next mark is placed.

In addition, 107 in the figure is a weight that makes it easier to rotate the print holder 102, and in this case as well, it may be arranged in a positional relationship that is rotated by 90 degrees or less as shown in FIGS. 6 to 8. Needless to say.

As specifically explained above, the present invention provides a device that is disposed in connection with a print and that comes into contact with a film sheet to prevent relative displacement between the film and the print in the direction of transport of the film. It has a support mechanism that supports the abutting tool such that it can be freely displaced in the direction of transport of the film sheet, and a displacement mechanism that moves the abutting tool supported by the support mechanism closer to or away from the film sheet. The present invention provides a printing device that allows for accurate marking on the film while continuously transporting the film, and a complex synchronized drive device that synchronizes the printing with the transport of the film sheet. By reliably displacing the markings in synchronization with the film sheet, clear markings can be made without causing relative displacement between the film sheet and the printed characters.

[Brief explanation of drawings]

The drawings show an embodiment of a printing device according to the present invention, and FIG. 1 is a side view showing the first embodiment;
Fig. 2 is a drawing taken along line 2-2 in Fig. 1, Figs. 3 to 5 are explanatory diagrams showing the operation of the device shown in Fig. 1, and Figs. 6 to 8 are illustrations of the second implementation. An explanatory diagram showing an example.

Claims (1)

[Claims] 1. Printing that comes into contact with a film sheet to mark the sheet, and a marking that is arranged in connection with the printing and that comes into contact with the film sheet and detects the relative displacement between the printing and the sheet in the transport direction of the sheet. a supporting mechanism that supports the abutting tool such that it can be freely displaced in the transport direction of the film sheet, and a displacement that moves the abutting tool supported by the support mechanism closer to or away from the surface of the film sheet. A printing device characterized by having a mechanism.