JPH047981Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a recording paper winding device for a printing device.

[Prior Art] In a printing device, recording paper is sent to a printing section by a paper feed roller, and after being printed in the printing section, the recording paper is transferred to the paper feed roller by rotation of a take-up bobbin. Sometimes the material is wound onto the take-up bobbin while being tensioned at a speed slightly faster than the feed speed. In such cases, the take-up bobbin is often rotatably held by being placed on a drive roller that comes into elastic contact with the outer peripheral surface of the flange and frictionally drives it to rotate, and on a receiving roller.

[Problem to be solved by the invention] Since the winding bobbin is placed on the driving roller and the receiving roller, the printing device has a specified installation orientation, and if the printing device is installed in a manner different from the specified installation orientation, It was not possible to use it in a posture.

Therefore, an object of the present invention is to provide a printing device that has an extremely simple structure and can be used in different installation positions.

[Means for Solving the Problems] A pair of receiving rollers is disposed at a position facing the outer circumferential surface of the flange of the take-up bin, and a drive roller is disposed between them, and the drive roller is arranged in a position facing the outer circumferential surface of the flange of the take-up bin, and the drive roller It is always in a position where it can receive the load of the winding bobbin even if the winding bobbin changes. One of the receiving rollers is selectively engaged with the winding bobbin depending on a change in the installation orientation of the printing device.

[Example] An example of the present invention will be described based on the drawings.

Figure 1 shows the inside of a printing device used in a vertical installation position, and a lid 1 is provided on the right side of a frame F of the printing device so that it can be opened and closed about a shaft 2. There is a frame 3 on the inside of the lid 1 that also serves as a paper guide to hold unprinted recording paper 4.
It is divided into a storage chamber 5, a winding bobbin 6, and a storage chamber 8. The recording paper 4 is passed through a paper detection switch 9, passed around a paper feed roller 10 and a platen 11, and further passed around a guide 12, and then wound onto a winding bobbin 7. A carriage 15 on which a thermal printing head facing the platen 11 is mounted moves in the left-right direction while being guided by a guide rail 14 as the lead screw 13 rotates. The recording paper 4 is fed by a paper feed roller 10, and is wound up under tension by the rotation of a winding bobbin 7. This winding bobbin 7
The configuration of the rotational drive means is such that a rubber roller 19 is in frictional contact with a drive shaft 18 of a drive motor 17, and a drive roller 21 fixed to a shaft 20 of this roller is elastically pressed against an outer circumferential surface 70 of a flange of a winding bobbin 7. In contact therewith, the winding bobbin 7 is frictionally driven to rotate. Note that since the winding bobbin 7 winds up the recording paper 4 while applying tension, the drive roller 21
Since the winding speed due to the rotation of the recording paper is slightly faster than the speed at which the rubber roller 10 feeds out the recording paper, rotational force is transmitted to the drive roller 21 and the outer peripheral surface 70 of the flange of the winding bobbin 7 while constantly slipping. There is.

The drive roller 21 is always subject to the load of the winding bobbin, no matter what position the printing device is placed in, for example, when it is installed horizontally or vertically, such as when installed on a table or mounted on a wall. placed in position. Furthermore, on both sides of the drive roller 21, the outer peripheral surface 7 of the winding bobbin 7 is
Two receiving rollers 22 and 23 are placed so as to face 0.
is arranged. One of the receiving rollers 22 is
In the figure, the outer circumferential surface 70 of the flange of the winding bobbin 7 is separated from the outer circumferential surface 70 of the flange of the winding bobbin 7, but when the printing device is installed in a horizontal position as shown in FIG. It is something that receives. The other receiving roller 23 receives the outer peripheral surface 70 of the flange of the bobbin 7 when the printing device is installed in a vertical position as shown in FIG. The receiving roller 23 is supported near the shaft 2 of the lid 1, and when the lid 1 is opened to take out the winding bobbin from the printing device, the receiving roller 23 also moves outward. This is to make it easier to take out the winding bobbin.

Further, the drive motor 17 is fixed to a holding plate 25 which is swingably provided around a shaft 24.
A clockwise rotational force is always applied by a spring 27 wound between the drive shaft 26 and the drive shaft 26, so that the drive shaft 18 of the drive motor is in elastic contact with the rubber roller 19.

The specific structure of the winding bobbin includes a winding shaft 71 and flanges 72 and 73 on both sides, as shown in FIG.
Two locking grooves 74 for locking the leading edge of the recording paper are bored along the axial direction on the outer periphery of the winding shaft. Furthermore, the winding shaft 71
is divided into two parts at the center, one of which is a cylindrical shaft body 7.
5, the other end is a shaft body 76.

The means for connecting the two shaft bodies 75 and 76 has the following structure. That is, a small-diameter connecting rod 77 is protruded from the center of the joint end surface of the shaft body 76, and a split groove 78 is formed along the axial direction in this connecting tuft, and a groove 78 is formed on the inner wall surface at the tip of the split groove. A click groove 78a is bored therein. On the other hand, a locking pin 79 is provided on the cylindrical shaft 75 in a direction perpendicular to its axis, and the shaft 76
When the connecting rod 77 is inserted into the hollow part of the cylindrical shaft body 75, the locking pin 79 is inserted into the click groove 78 of the split groove 78.
a, the cylindrical shaft body 75 and the shaft body 76 are connected.

[Effects of the invention] As described above, according to the invention, even if the printing device is used in different installation orientations, the drive roller always receives the load of the take-up bobbin regardless of the change in orientation.
In addition, one of the receiving rollers is selectively engaged with the winding bobbin in response to a change in the installation orientation of the printing device, and the winding bobbin is held at an appropriate position.
The installation position of the printing device is extremely flexible.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the printing device in a vertical installation position, FIG. 2 is a sectional view of the printing device in a horizontal installation position, and FIG. 3 is an enlarged sectional view of the main parts. A...Printing device, F...Outer frame of printing device, 1...
... Lid body, 4 ... Recording paper, 7 ... Winding bobbin, 1
6...Print head, 21...Drive roller, 22,
23... Receiving roller, 70... Outer peripheral surface of the flange of the winding bobbin.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A take-up bobbin for winding the recording paper recorded by the print head is disposed in the printing device that can be used in different installation positions, and the above-mentioned roll A pair of rotatably supported receiving rollers are disposed at a position facing the outer circumferential surface of the flange of the take-up bobbin, and a drive roller is positioned between them and drives the take-up bobbin to rotate by friction. The drive roller is in a position where it can always receive the load of the take-up bobbin when the printing device is used in any installation orientation, and the receiving roller is configured to adjust its load depending on the change in the installation orientation of the printing device. A recording paper winding device for a printing device, wherein one of the recording paper winding devices can be engaged with the winding bobbin. (2) A record of a printing device according to claim 1 of the utility model registration claim, characterized in that one of the receiving rollers is attached to a lid that is openable and closable on the outer frame of the printing device. Paper winding device.