JPS6354520B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous medium separating device that is installed in a continuous medium passing path and used to separate a continuous medium on which printing has been performed from its perforations. be.

As this type of media separation device, JP-A-51-
A device described in Japanese Patent No. 111988 is known. The device described in this publication uses a roller whose axis is oblique with respect to the traveling direction of the medium or a roller with a tapered peripheral surface to contact the medium and apply a non-uniform tensile force in the width direction of the medium. The structure is such that the medium is separated at the eye.

However, when using the above structure, there is a problem in that manufacturing costs increase due to manufacturing difficulties such as the need to machine diagonal shaft holes in the frame that pivotally supports the rollers, and the need to machine taper holes in the rollers. There is. In addition, the roller for separating the medium needs to be pressed against the medium and separated as it passes the perforation, but in the above structure where the separating force is applied by rotational movement after being pressed against the medium, the roller is pressed against the medium. It takes a certain amount of time to complete the separation of the medium from the media, and it is necessary to provide the separation roller at least a distance away from the presser side roller by a distance that the perforation travels during that time. Therefore, in printers in which medium is fed at high speed, a problem arises in that the separating device becomes large.

This invention was made with the aim of solving these problems, and proposes a device having a structure in which the perforations are separated by the up-and-down movement of a roller around an axis parallel to the direction in which the medium is transported. It is.

Hereinafter, a description will be given based on the embodiments shown in the drawings.

1 to 4 show an embodiment of the present invention, in which 1 is a medium introduction guide;
is the print head, 3 is the anvil, 4 is the drive roller 4
a and a driven roller 4b, a friction roller for feeding a single standard medium; 5, a tractor that engages with the perforation of the continuous medium to feed the continuous medium; 6, 7;
8 is a medium guide plate, 8 is a medium discharge guide, and 9 is a continuous medium separating device of the present invention. The continuous medium separation device 9 includes a swing frame 1 which is pivotally connected to an unmovable member (not shown) by a pin 10 parallel to the conveyance direction of the medium 19.
1. An undulating roller 1 pivotally attached to this swing frame 11
2. A fixed roller 13 and a swing frame 11 are pivoted to a fixed member (not shown) and are opposed to the undulating roller 12.
a spring plate 14 whose base end is fixed to the spring plate 14;
Presser piece 15, rollers 12 and 1 fixed to the tip of
3, a tension spring 17 that separates the rollers 12 and 13, and a drive device 18 that rotates the undulating roller 12. In this state, the presser piece 15 is located slightly below the lower end of the undulating roller 12.

When the continuous medium 19 is transported by the tractor 5 and the perforation 20 to be separated reaches between the presser piece 15 and the rollers 12, 13, the solenoid 16 is energized and the solenoid 16 is moved clockwise in FIG. When the rotating roller 12 is inverted, the undulating roller 12 and the fixed roller 13 come into contact with each other sequentially starting from the one closest to the pin 10. 7, the perforation 20 of the medium 19 is separated from the side closer to the pin 10, and the perforation 20 of the medium 19 is separated at the position where the undulating roller 12 is parallel to the fixed roller 13. will be completely separated. Immediately thereafter, the solenoid 16 is deenergized, the undulating roller 12 and the presser piece 15 move upward, and the medium 19 is released.

This series of operations can be performed even when the print head 2 is performing a printing operation and therefore the medium 19 is in a stopped state, or when the medium 19 is being subjected to a changeover operation. This does not limit the operation of the printer. Since the print medium 19 is intermittently fed out by an amount corresponding to the line feed in the printing operation, the interval between the presser piece 15 and the undulating rollers 12 and 13 is larger than the amount of one line feed. I have to do it.

As described above, the continuous medium separating device according to the present invention includes a roller device provided in the continuous medium passing path with a roller that is undulated around an axis parallel to the conveying direction of the medium and pressed against the medium. The medium is separated by pressing the roller against the medium while rotating, and since the separation of the medium is completed when the pressure contact operation of the roller is completed, the separation operation at the perforation can be performed quickly. It is possible to make the device compact and the structure is simple and does not require troublesome processing, which makes the device inexpensive and can be easily attached to existing printers. be.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a side view showing the main parts of the printer, Fig. 2 is a plan view showing the roller and presser piece, Fig. 3 is a front view, and Fig. 4 is a side view showing the main parts of the printer. The figure is a front view of the main parts showing the state during operation. In the figure, 1...medium introduction guide, 2...print head, 4...friction roller, 5...tractor, 9...
Continuous media separation device, 10...pin, 11...swing frame, 12...undulating roller, 13...fixed roller, 14...spring plate, 15...pressing piece, 16...
Solenoid, 18... Drive device, 19... Continuous feed medium, 20... Perforation.

Claims (1)

[Claims] 1. A roller device is provided in the continuous medium passage path, which presses against and separates from the medium by an up-and-down movement around a pin 10 parallel to the medium transport direction, and the roller device presses against and separates from the medium.
Reference numeral 0 denotes a presser foot which is arranged so that the roller 12 of the roller device comes into contact with the medium 19 sequentially from the side closer to the pin 10 as the roller 12 falls down, and advances in synchronization with the fall of the roller to clamp the medium. A strip 15 is provided and the perforations 20 in the media are aligned with the roller 12.
A continuous medium separating device characterized in that the roller device is pressed and rotated at the timing when the roller device passes between the presser piece 15 and the presser piece 15.