JPH03243542A - Cut sheet feeder - Google Patents

Abstract

PURPOSE:To restrain each cut sheet from being curved as well as to concurrently move the bow of each cut sheet to the direction of feeding by providing fan type rollers which push each cut sheet, coaxially with fan type auxiliary rollers each of which makes contact with each cut sheet later than the fan type rollers, and is identical in radius to each fan type roller but is shorter in a length of an arc than each fan type roller. CONSTITUTION:An uppermost cut sheet 1 is fed out by means of the rotation of fan type rollers 6, but is curved because the both tip corner ends of the cut sheet 1 is pressed by separating pawls 3 and 4. In this case, fan type auxiliary rollers 7, each of which is identical in radius to each fan type roller 6 but is shorter in a length of an arc than each fan type roller, are mounted on a roller shaft 5 wherein each end section at the side opposite to the direction of the rotation of the roller shaft 5 is trued up in such a way that each auxiliary roller makes contact with each cut sheet 1 later than each roller 6 when the roller shaft 5 is rotated. This thereby restrains each cut sheet 1 from being curved by the auxiliary rollers 7, thereby pushing the bow of each cut sheet out to the left concurrently by means of rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cut sheet feeding device equipped with a separating claw.

2. Description of the Related Art Cut sheet feeding devices have been widely used in products such as copying machines and printing machines.

A conventional cut sheet feeding device will be described below.

FIG. 4 is a schematic perspective view of a conventional cut sheet feeding device, and FIG. 5 is a plan view. In FIGS. 4 and 5, ■ is a cut sheet, 2 is a loading table for loading cut sheet 1, and 3 is a loading table for loading cut sheet 1.
．． 4 is a pair of separating claws provided at both corners of the tip of the cut sheet 1 and presses both corners of the cut sheet 1; 5 is a roller shaft; and 6 is attached to the roller shaft 5 so as to be in contact with the cut sheet l; The fan-shaped roller 8 that pushes out the roller 8 is an auxiliary roller having a smaller diameter than the roller 6 attached to the roller shaft 5.

The operation of the cut sheet feeding device configured as described above will be described below.

First, as shown in FIG. 6, the roller 6 rotates in the direction of the arrow and pushes out the uppermost cut sheet 1 to the left. The uppermost cut sheet 1 is pushed out by the rotation of the roller 6, but the cut sheet 1 is curved because both corners of the leading edge of the cut sheet 1 are pressed by the separating claws 3.4. However, this curved portion can be reduced (reduced) by the auxiliary opening 8.

Next, the uppermost cut sheet 1 is detached from the separating claw 3.4 due to the restoring force of the cut sheet, and is sent further to the left by the rotation of the roller 6.

Problems to be Solved by the Invention However, in the above conventional configuration, the curvature of the cut sheet is suppressed by the auxiliary roller in order to prevent the cut sheet from being caught by the feeding kite etc. due to the curved portion, but the curvature of the cut sheet is prevented. In the case of a cut sheet that is curved, there is a problem in that the curve of the cut sheet cannot be moved in the feeding direction, which hinders feeding.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention is provided with a fan-shaped roller arranged to be in contact with the cut sheet and to be in contact with the cut sheet later than the roller on the same axis as the fan-shaped roller that pushes out the cut sheet. Equipped with a fan-shaped auxiliary roller with the same diameter as the roller and a short arc length.

Effects With the above-described configuration, the present invention makes it possible to suppress the curvature of the cut sheet and at the same time move the curvature of the cut sheet in the feeding direction when extruding the cut sheet.

Embodiment FIG. 1 is a schematic perspective view of a cut sheet feeding device according to an embodiment of the present invention, and FIG. 2 is a plan view of the cut sheet feeding device. In FIGS. 1 and 2, 1 is a cut sheet, 2 is a loading table, 3.4 is a separating claw, 5 is a roller shaft, and 6 is a roller. These are the conventional examples shown in FIGS. 4 and 5. Since the configuration is the same as the configuration, detailed explanation will be omitted. 7 is a fan-shaped auxiliary roller with the same diameter as roller 6 and a short arc length (when the roller shaft 5 rotates, the cut sheet 1 is
The roller shaft 5 is attached to the roller shaft 5 with its end opposite to the rotational direction of the roller shaft 5 aligned so as to be in contact with the roller shaft 5 .

The operation of the cut sheet feeding device configured as described above will be described below.

Here, the operations other than the auxiliary roller 7 are the same as the conventional operations, so a description thereof will be omitted. As shown in FIG. 3, the uppermost cut sheet 1 is sent out by the rotation of the roller 6, but it is curved because both corners of the leading edge of the cut sheet 1 are pressed by the separating claws 3.4. However, this curvature is suppressed by the auxiliary roller 7, and the curvature is pushed out to the left by rotation.

Effects of the Invention As described above, the present invention has a fan-shaped roller that is arranged coaxially with the fan-shaped roller that pushes out the cut sheet and that is arranged so as to come into contact with the cut sheet later than the roller. By providing a fan-shaped auxiliary roller with a short length, it is possible to suppress the curvature of the cut sheet when extruding the cut sheet, and also to move the curvature of the cut sheet in the feeding direction.
It does not interfere with sending out even thick paper.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view of a cut sheet feeding device according to an embodiment of the present invention, FIG. 2 is a plan view of the cut sheet feeding device, FIG. 3 is an explanatory diagram of the operation of the cut sheet feeding device, and FIG.
The figure is a schematic perspective view of a conventional cut sheet feeding device, FIG. 5 is a plan view, and FIG. 6 is an explanatory diagram of the operation of the cut sheet feeding device. 1...Cut sheet 3...Separation claw 5...Roller shaft 7...Auxiliary roller

Claims (1)

[Claims] a table for stacking a plurality of stacked cut sheets; a claw attached to the table to prevent extrusion of the cut sheet; and a fan-shaped roller for contacting the cut sheet and extruding the cut sheet. , a cut sheet feeder comprising: a fan-shaped auxiliary roller disposed coaxially with the roller so as to come into contact with the cut sheet later than the roller, and having the same diameter as the roller and a short arc length; sending device.