JPH034507Y2 - - Google Patents

Description

[Detailed description of the invention] This invention prints on the film by moving a stamp heated to a temperature at which carbon ink melts, moving it downward at high speed at predetermined time intervals, and pressing the heated stamp against the film through a carbon tape. The present invention relates to a hot printer that is designed to perform.

The main use of this hot printer is to stamp, for example, the date of manufacture at regular intervals on a horizontally flowing strip of packaging film. In this type of hot printer, the engraving is moved up and down by crank motion, and the engraving is in contact with the film at the bottom dead center of the crank pin, so it is not possible to leave the engraving pressed against the film for a long time. . It goes without saying that the longer the time to press the stamp on the film, the clearer the print will be, but with conventional hot printers of this type, it was not possible to press the stamp on the film for a very long time for the reasons mentioned above. I couldn't have made it more clear.

In view of the above points, the present invention attaches a cushioning tension roll to the carbon tape so that the tape can be stretched freely, and also provides a spring between the stamp receiving plate and the pedestal below it. The stamp contacts the receiving plate while moving downward, and pushes the receiving plate down to the bottom dead center of the crank movement against the spring force, thereby extending the time during which the stamp is in contact with the receiving plate. This extends the stamping time.

Embodiments of the present invention will be described below based on the drawings.

In the drawing, a rod 3 is supported so as to slide vertically on a rod support block 2 provided at the center of a vertical wall-shaped frame 1, and a stamp 5 is fixed to the lower end of the rod 3 via a heating head 4. At the same time, the stamp is heated to a predetermined temperature by a pipe heater 6 provided within the head 4. A crank plate 8 is provided on the frame 1 above the block 2 via an intermittent rotating shaft 7, and a crank pin 9 on the crank plate 8 and the upper end of the rod 3 are connected via a connecting rod 10. On the back side of the frame 1, the intermittent rotating shaft 7 is connected to a driving shaft via a one-turn clutch equipped with an electromagnetic brake, so that the crank 8 rotates intermittently at predetermined time intervals. Further, a take-up reel 11 is provided on one side of the front of the frame via the crank plate 8, and a pay-out reel 12 is provided on the other side, and the carbon tape K engaged with these reels is disposed along the transportation trajectory. , a pinch roll 13, a pair of guides 14, 14 for holding the carbon tape horizontally below the stamp, and a cushioning tension roll 15.
are arranged respectively. Furthermore, a pedestal 16 is provided below the stamp 5, and a receiving plate 18 is installed on the pedestal via a spring 17, so that the film F is moved along the upper surface of the receiving plate.
Note that 19 is a screw for adjusting the upper limit position of the receiving plate.

The illustrated embodiment is configured as described above,
The action will be explained below.

The take-up reel 11 repeats the movement of intermittently winding up the carbon tape K by an amount corresponding to the width of the marking 5. On the other hand, the film F is intermittently fed by a fixed amount in the direction of the arrow, but since the feeding of the film F and the movement of the take-up reel 11 are mechanically synchronized, the film F stops and the carbon tape K stops. are in sync. Also, as mentioned above, carbon tape K
When the film F and the carbon tape K stop, the crank plate 8 rotates once at high speed and temporarily presses the carbon tape K and the film F against the receiving plate 18 by the markings 5. In this case, the stamp contacts the receiving plate 18 during the downward movement, compresses the spring 17 and presses the receiving plate 18 until the bottom dead center of the crank movement is reached, and continues to contact the receiving plate 18 until the middle of the upward movement. . This state will be explained based on FIG. 2. In the figure, R is the time required for the crank plate 8 to rotate once, S is the stroke amount of the stamp 5, and A is the downward movement of the receiving plate 18 by compressing the spring 17. It is the amount that sinks. Therefore, the time for heating the carbon tape by stamping can be obtained within the range indicated by B. In reality, the time it takes for the crank plate 8 to make one revolution is almost instantaneous. Otherwise, the efficiency of intermittent feeding of the film F will be reduced and the packaging efficiency will be greatly affected. The heating time B mentioned above is therefore more instantaneous. However, from a microscopic point of view, it takes longer than the conventional method of marking only at the bottom dead center of the crank motion. Note that as the receiving plate 18 is pushed downward, the carbon tape K is also pulled downward, but the cushioning tension roll 15 provides cushion to the carbon tape to prevent it from being cut.

As described above, in the hot printer of the present invention, the receiving plate 18 below the stamp that strokes in the vertical direction by a crank motion is placed on the base 16 via the spring 17, and the receiving plate 18 is placed on the base 16 through the spring 17. 18, the base plate is sunk downward to the part corresponding to the bottom dead center of the crank motion, and the carbon tape K is in contact with the film F for a long time due to the markings. Board 1
Tension roll 1 on the carbon tape between 8 and 8
5 and carbon tape K by the amount that the stamp 5 sinks downward due to the buffer provided by the tension roll.
Since the marking and the receiving plate follow each other, there is no problem in the integral movement of the marking and the receiving plate, and the contact time between the marking and the receiving plate can be extended to extend the printing time. By changing the height of the receiving plate 18, the printing time can be arbitrarily set according to the film thickness, temperature, etc.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is an explanatory view of its operation. 3... Rod, 4... Heating head, 5... Engraving, 7... Intermittent rotating shaft, 8... Crank plate, 11
...Take-up reel, 12...Feed-out reel, 15...
...tension roll, 16... pedestal, 17... spring, 18... receiving plate.

Claims (1)

[Scope of utility model registration request] A marking 5 is provided via a heating head 4 on the lower end of the rod 3 which moves up and down while being connected via a connecting rod 10 to a crank plate 8 which rotates intermittently one rotation at a time.
Take-up reels 11 provided on both sides of the crank plate 8
Tape guides 14, 14 are provided so that the carbon tape K, whose both ends are wound around the feed roll 12, passes below the stamp 5.
In a device in which a receiving plate 18 for the film F is disposed in a lower region of the film F, a screw 19 is engaged with a pedestal 16 that supports the receiving plate 18 so as to be vertically displaceable, and the receiving plate 18 above the screw is engaged with a base 16 that supports the receiving plate 18. A spring 17 is interposed between the screw 19 and the screw 19, and the height of the receiving plate 18 is adjusted by the screw so that the stamp 5 contacts the upper surface of the receiving plate 18 by the time it reaches its lower limit during downward movement. While the above-mentioned feeding roll 12
A hot printer characterized in that a cushioning tension roll 15 is brought into contact with the carbon tape between the carbon tape and the receiving plate 18.