JPS58119539A - Medium guide mechanism - Google Patents

Abstract

PURPOSE:To prevent front edge fold or bending of a medium such as long-sized tape by furnishing a guide, which provides easy insertion of the medium in the right position in the roller gap, in the running path for the medium. CONSTITUTION:A medium 3 such as long-sized tape, thin sheet, etc. is sent to a running path 5 under guidance of the expanding inlet 20 while undergoing correction of a warp etc. at its leading edge, and inserted into it while running along a guide 4 to come against a boss 6 provided at the exhaust hole 10. Because this boss 6 is equipped with an upward stretching slope at its surface where the leading edge of the medium 3 will run against, the medium 3 in collision slides into a gap 8 between rollers 1, 2 under guidance of said slope. At this time, a lever 7 shall be depressed in the direction of Arrow P to pinch the medium with drive roller 1 and a pinch roller 2, and then the medium is transported by turning the drive roller 1 in the direction of Arrow R, i.e. the pinch roller 2 in the direction of Arrow R'.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a medium guide mechanism, and more particularly to a medium guide mechanism for feeding a long tape or thin paper sheet to a normal position of a medium transport roller.

b. Prior art and problems A pair of feed rollers are provided in opposing positions, one of which is a driving roller and the other is a pinch roller. After the medium is inserted between the rollers, the medium is moved by the pinch roller. A media feeding mechanism is generally used in which the media is pressed against a drive roller, and when the drive roller is rotated by a motor, the media is transferred by the friction generated between the drive roller and the media. At this time, if the medium inserted between the rows 2 and transported by the rotation of the rollers is a thin sheet of paper or tape with weak stiffness, a problem will occur when the medium is inserted between the rollers.

Normally, the medium is guided by a medium guide and inserted into the gap between the rollers, but the roller surface is placed at a position that protrudes ten times beyond the guide surface in order to improve the transfer effect when transporting the medium. It is provided. Moreover, the rollers rotate in close contact with each other during transport, but when the medium is inserted, they form a small gap and oppose each other. Therefore, when a medium is inserted into the pupil between the rollers along the guide, if the medium is thin, it will hit one of the rows, causing the leading edge to bend or warp, making it difficult to insert the medium correctly. there were.

C1 Object of the Invention The object of the present invention is to provide a means for solving the above-mentioned problems. A guide is provided in which two shafts are connected to each rotating shaft, and the medium is inserted into the gap through the guide, and a guide is prepared in which the medium is pinched by the rollers to form a narrowed medium running path, and the medium is discharged. It is also characterized by a position where the leading edge of the medium is introduced into the gap.

Example of C0 invention The details of the invention will be clarified below using the figures.

FIG. 1 is a schematic side view of a medium guide mechanism according to an embodiment of the present invention, in which l is a drive roller, 2 is a pinch roller, 3 is a medium, and 4 is formed by #'i guide and SFi guide 4. 6 is a projection having an inclined surface provided at the discharge port of the guide 4, 7 is a lever of the pinch row 22, 8 is a gap,
10 is a discharge port, and 20 is an insertion port.

By expanding the insertion port 20, the medium 3 is guided into the running path 5 after straightening the warp on the front edge, and is guided into the guide 4.
, and hits the protrusion 6 provided at the discharge port 10 position.

Since the protrusion 6 is provided with an upwardly sloping surface on which the leading edge of the medium 3 abuts, the medium 3 that abuts is guided by the sloping surface and does not slide into the gap 8 between the rollers 1 and 2. I can do it. After confirming that the medium 3 has entered the gap 8 normally, the lever 7 is pushed down in the direction of the arrow P using a holding mechanism (not shown), the medium is pinched between the drive roller 1 and the pinch row 22, and the drive roller 1 is moved in the direction of the arrow P. R1 Therefore, by rotating the pinch roller 2 in the direction of the arrow R', the medium is transferred.
This is a side view of I, and the symbols in the figure are the same as in FIG. The difference from Fig. 1 is that the insertion and suction direction of the medium is from top to bottom; Instead of attaching A6 to the guide 4, it is attached to the lever 7 of the pinch roller 2. ) By moving the leno (-7) in the direction of arrow P using a presser mechanism (not shown), the hatched protrusion 6 protrudes into the travel path 5, and the medium 3
The leading edge of the rice 3 that passes through the discharge port and moves down the travel path comes into contact with the protrusion 6. Since the abutment point m of the protrusion 6 has an inclined side in a direction that allows the medium 3 to slide into the gap 8, the front edge of the medium 3 can be easily set in the gap 8.

f1 Effects of the Invention By using the medium guide mechanism according to the present invention, there is an effect that the medium can be easily inserted into the correct position in the roller gap. Furthermore, since the insertion opening of the medium guide is widened, even if the leading edge of the medium itself is warped, it can be easily inserted into the β-id.

[Brief explanation of the drawing]

Figures 1 and 2 are -■ views of the media feeding mechanism, where 1 is a drive roller, 2 is a pinch roller, 3 is a medium, 4 is a guide, 5 is a running path, 6 is a protrusion, and 7 is a Lever, 8 is gap, 1
0 is the ejection port, 20 is the insertion port 1, i, j

Claims (1)

[Claims] Ho (1) The medium is placed in opposing positions with two parallel axes serving as rotation axes, and a medium is inserted into the gap via a scissor guide, and the core roller pinches and rotates. In the medium transport mechanism for transporting the medium, a guide is provided which forms a medium running path that widens at the medium opening and narrows at a position close to the roller, and guides the leading edge of the medium to be discharged into the gap. Media guide mechanism 0 characterized by being provided at a position where the medium is inserted.