JPS5842363Y2 - Winding drum in label printer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mount take-up drum for a label printer that uses a band-shaped mount with a large number of labels pasted at a constant pitch.

In conventional label printers, the backing paper after the label has been peeled off is held between a pair of feed rollers, one of the rollers is driven to pick up the backing paper, and the picked up backing paper is wound up on a winding shaft. Therefore, there are various problems such as the interlocking of the feed roller and the winding shaft and the adjustment of the rotational speed of the winding shaft in response to changes in the diameter of the wound mount.

For this reason, if the backing paper after label peeling is directly wound up on the winding drum, there is a risk that the backing paper will be tightly wrapped around the winding drum due to the tension of the backing paper, making it difficult to remove the wound backing paper from the drum.

In view of these problems, the present invention has been developed by making the drum into a cylindrical shape with a split so that its diameter can be changed, and by storing an airtight tube that can be expanded and contracted inside the drum, and by expanding the tube, the diameter of the drum can be changed. Wind up the mount using the dog as a dog.
After winding, air is removed from the tube to reduce the diameter of the drum to make it easier to remove the mount.The details are as follows.

In the figure, 1 is the machine frame of the label printer, 2 is the peeling table,
3 is a printing wheel, 4 is a -.mma, and A is a winding drum, which is composed of a drum body 5 in the shape of a cylinder or a polygonal tube and an airtight tube 6.

The main body 5 has one end open and a shaft 7 fixed concentrically to the other end.

Moreover, since the main body 5 is formed with one or more axial cracks 8 extending from the open end to the axis r, the outer diameter of the main body 5 can be adjusted freely even if it is made of metal. Get scaling.

Further, the tube 6 is provided with a fluid inlet/outlet 9 at one end, and a valve is provided in the inlet/outlet 9, but this is not shown.

The present invention has the above structure, and the mount 10 pulled out from the winding frame (not shown) is guided as shown in FIG.
0 is inserted into the outside of the tube 6 inside the main body 5 and into the main body 5 through the crack 8 of the drum main body 5, and when air or liquid is forced into the tube 6 through the inlet/outlet 9, the tube 6 expands and becomes a tube. There is no gap between 6 and the main body 5, and the end of the mount 10 is fixed.

When the pressure is further increased to expand the tube 6, the main body 5 is pushed out from the inside and its outer diameter increases.

When the label printer is started in this state, the drum A rotates as the motor rotates and winds up the mount 10, but when a detector (not shown) detects the space between the labels 11 on the mount 10, the motor stops. At the same time as the drum A1 mount 10 stops, the printer 4 operates, and the label 11 is pressed against the printing wheel 3 that has the required value to print.

The motor is activated again by the next activation signal, and the drum A rotates to wind up the mount 10. When the detector detects the gap between the labels 11, the mount 10 stops and the hammer 4 acts.

Such operations are repeated, but when moving the mount 10,
The mount 10 is pressed at the peeling table 2 and bent at a sharp angle, and the label 11 is peeled off from the mount 10.

Therefore, an appropriate tension is applied to the mount 10, so that the mount 10 is tightly wound around the drum body A.

However, in the case of the present invention, when winding the mount 100, the tube 6 is expanded and the diameter of the main body 5 is expanded by the pressure. When discharged from the inlet/outlet 9, the tube 6
As the main body 5 contracts, the main body 5 also returns to its original shape, and its outer diameter becomes smaller.

Therefore, slack is created between the drum A and the mount 10, and the end of the mount 10 that was sandwiched between the tube 6 and the main body 5 also comes off, so the mount 10 is easily removed from the drum A.

As mentioned above, the present invention has a main body 5 that can expand and contract the drum A.
and a tube 6, so that the outer diameter of the main body 5 can be changed by the flow of fluid into and out of the tube 6, so that the drum diameter can be expanded when winding up the mount, and reduced when the mount is removed. This has the effect that the mount can be removed very easily, and the ends of the mount 10 are connected to the main body 5 and the tube 6.
Since it can be sandwiched between the sheets, it has advantages such as easy attachment of the mount.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway vertical side view of a label printer using the drum of the present invention, FIG. 2 is an exploded perspective view of the drum of the present invention, and FIG. 3 is an enlarged cross-sectional view of the drum of the present invention. 2...Peeling table, 5...Drum body, 6
......Airtight tube, I...Shaft, 8.
...split, 10... mount, 11...
... Label, A ... Winding drum.

Claims (1)

[Scope of utility model registration request] A label in which a band-shaped mount with labels pasted at a constant pitch is moved intermittently at the same pitch as the label pitch, and after the required printing is applied to the label, the label is peeled off using a peeling table that bends the mount at a steep angle. In the printer, the winding drum of the mount is driven by a motor and has a cylindrical drum body that can be expanded and contracted by an axial split, and a drum body that is housed within the drum body and that when expanded, the diameter of the drum body is changed. A winding drum in a label printer is composed of an airtight tube that can be expanded and contracted.