JPH01145169A - Automatic mounting mechanism for paper - Google Patents

Abstract

PURPOSE:To automatically and surely perform the alignment of a tractor, and the feed and mounting of a paper by providing a pair of rollers, which have paper width detecting photosensors and provided to the front stage of a linearily moving tractor mechanism to feed paper, a paper detecting photosensor and the solenoids connected to the clamp rollers of said rollers by a link mechanism. CONSTITUTION:When the leading end of paper 23 is detected by a paper detecting photosensor 11, the paper 23 is fed to a position, where the width of the paper 23 can be detected by a paper width detection photosensor 16, by feed rollers 5 and clamp rollers 6 and stops. When the width of the paper is detected, the paper is set to a position where a sprocket hole is matched with the pin of a right-side tractor 4. Subsequently, a left-side tractor 3 and the right-side tractor 4 are driven and the paper 23 is fed by both tractors 3, 4 to be mounted. When the paper 23 is fed until detected by a paper mounting detection photosensor 18, drive motors 7, 12 are stopped and a solenoid 10 is attracted and the clamp rollers 6 are raised to finish the whole operation of paper feed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic paper loading mechanism in a printing device that prints using several types of continuous paper with sprocket holes of different widths.

[Prior Art] Conventionally, in a printing device that prints several types of continuous paper with sprocket holes of different widths, positioning the tractor and loading the paper is done by opening the tractor cover and loading the paper into the bin on the pin belt of the tractor. This was done by aligning the sprocket holes of the tractor and then closing the tractor cover, which was done manually by the operator.

[Interlayer Points to be Solved by the Invention] In the above-described conventional printing device that prints on several types of continuous paper with sprocket holes of different widths, the positioning of the tractor and the loading of the paper are done by the operator. There are cases where the alignment positions are different, which may cause damage to the sprocket holes, and there is also the disadvantage that the tractor can only be installed in a position that takes into consideration the operability of the tractor.

[Means for Solving the Problems] The automatic paper loading mechanism of the present invention can be used in a printing device that prints on continuous paper with sprocket holes of several different widths.
a tractor mechanism that has a paper width detection photosensor that detects the paper width and moves linearly by a linear drive means; a pair of rollers that are provided in front of the tractor mechanism and that transport the paper;
The apparatus is characterized by comprising a paper detection photosensor that is provided upstream of the roller and detects the presence or absence of paper, and a solenoid that is connected to the clamp roller of the roller by a link mechanism.

[Example] Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a schematic perspective view of a printing device for printing on several types of continuous paper sheets with sprocket holes of different widths, showing one embodiment of the present invention.

In FIG. 1, there is a printing section 30 consisting of a print head 1 and a platen 2 on the front side in the direction of movement of the printing device, and a conveyance section 4 including an automatic sheet loading mechanism on the rear side.
0 is set. The conveying section 40 is composed of a left tractor 3, a right tractor 4, a feed roller 5 for feeding sheets to these tractors, and a clamp roller 6 driven by the feed roller 5. The feed roller 5 is driven by a drive motor 7 via a belt 8. Further, the clamp roller 6 is connected to a solenoid 10 by a link mechanism 9, and is mounted so that it can be moved up and down by this solenoid 10.

The paper detection photosensor 11 is connected to the clamp roller 6 described above.
It is fixed to the left side plate 19 near the paper 23.
It has a function of detecting the insertion of.

The left tractor 3 and the right tractor 4 described above have a belt 13 connected to a drive motor 12 that is synchronized with the drive motor 7.
It is transmitted by. Of these, the left tractor 3 is fixedly attached so that it cannot be moved, and the right tractor 4 is movable in the width direction of the paper 23 by a drive motor 14 and a lead screw 15. Therefore, the paper width detection photosensor 16 is fixed to the right tractor 4 with a plate 17 so as to be able to detect the width of the paper 23.

Next, a paper attachment detection photosensor 18 detects that the paper 23 is attached to the left tractor 3 and the right tractor 4.
It is fixed to the left side plate 19 on the front side of each of the tractors 3.4.

The upper guide plate 21 and the lower guide plate 22 guide the conveyance of the paper 23 from the above-mentioned transport unit 40 to the printing unit 30 without any resistance, and also prevent the movement of the right tractor 4 and the paper width detection photosensor 16. It is fixed between the left side plate 19 and the right side plate 20 so as not to become erroneous.

Next, the operation of the present invention will be explained.

In FIG. 1, when the paper detection photosensor 11 detects the leading edge of the paper 23 inserted from the left end, the drive motor 7 is driven and is transmitted to the feed roller 5 by the belt 8.
When the feed roller 5 rotates, this feed roller 5
The driven clamp roller 6 also rotates, the paper 23 is conveyed to the feed roller 5 and the clamp roller 6, the paper 23 is conveyed to a position where the paper width detection photosensor 16 can detect the width of the paper 23, and the drive motor 7 is stopped. paper 23
stops.

Next, the drive motor 14 is driven, and the right tractor 4 and the paper width detection photosensor 16 fixed to the right tractor 4 by a plate 17 move until the paper width detection photosensor 16 detects the width of the paper 23. When the width of the paper 23 is detected, the drive motor 14 is stopped, and the paper 23 is set at a position where the sprocket hole of the paper 23 and the bin of the right tractor 4 are aligned. When the drive motor 7 is driven again, the drive motor 12 is simultaneously driven in synchronization, and then the left tractor 3 and the right tractor 4 are driven, and the paper 23 is conveyed and mounted on the left tractor 3 and the right tractor 4. When the paper 23 is conveyed until it is detected by the paper attachment detection photosensor 18, the drive motor 7 and the drive motor 12 stop, and the solenoid 10
is attracted, the clamp roller 6 is lifted, and the entire paper conveyance operation is completed.

[Effects of the Invention] As described above, the present invention includes a tractor mechanism that has a paper width detection photosensor that detects the paper width and moves linearly by a linear drive means, and a pair of tractor mechanisms that are provided in the front stage of the tractor mechanism and that transport the paper. The structure includes a roller, a paper detection photosensor installed in front of the roller to detect the presence or absence of paper, and a solenoid connected to the clamp roller of the roller by a link mechanism, so that it can handle paper of various paper widths. However, by the functions of each photo sensor and the tractor mechanism, it is possible to automatically and reliably align the tractor and transport and load the paper. This has the effect of reliably avoiding accidents such as damage to sprocket holes due to discrepancies.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a printing device for printing on several types of continuous paper sheets with sprocket holes of different widths, showing one embodiment of the present invention. 1: Print head 2 Nibraten 3: Left tractor 4: Right tractor 5: Feed roller 6: Clamp roller 7.12.14: Drive motor 8.13: Belt 9: Link mechanism 10: Solenoid 11: Paper detection photo sensor 15: Lead Screw 16 2 Paper width detection photosensor F: Mounting plate 18: Paper attachment detection photosensor 19: Left side plate 20: Right side plate 21: Upper guide plate 22: Lower guide plate 23: Paper 30: Printing section 40: Conveying section

Claims (1)

[Scope of Claim] A printing device for printing on continuous paper with sprocket holes of several different widths, comprising: a tractor mechanism that has a paper width detection photosensor that detects the paper width and moves linearly by a linear drive means; A pair of rollers provided at the front stage to transport the paper,
An automatic paper loading mechanism comprising: a paper detection photosensor provided upstream of the roller to detect the presence or absence of paper; and a solenoid connected to a clamp roller of the roller by a link mechanism.