JPH0313433A - Sheet feeder - Google Patents

Abstract

PURPOSE:To peel the sheet at any thickness from thin to thick by providing a spacer simply and movably against a claw part so that any one df claw system and frictional separation system can be selected in response to the sheet thickness. CONSTITUTION:When the cut paper is peeled one by one, the end of the sheet is caught by a claw part 2 by sliding a spacer 3 to a housing part 8 of a sheet cassette 1 to be housed. The sheet is thereby peeled by the rotation of a separating roll 5 and the work of the claw part 2. Next, when the thick paper such as a post card, an envelope or the like is peeled one by one, the spacer 3 is slided to the avoidance feeding line of the claw part 2 of the sheet cassette 1. The sheet is thereby peeled by the rotation of the separating roll 5 and the work of a frictional separating plate 4 of the sheet feeding surface of the sheet cassette 1.

Description

[Detailed description of the invention] [Industrial application field] This issue relates to sheet feeders.

[Conventional technology]

As shown in FIG. 4, a sheet feeder, which is a paper feeding mechanism of a conventional printer, has a claw section 10 attached to a cassette section 9 in which paper is set, and when a paper separation roll 11 rotates in the direction b, the paper passes through the claws at both ends. The film is peeled off one by one by the action of the part 10.

[Problem to be solved by the invention]

In the conventional method described above, in which paper is separated sheet by sheet using the claws of the sheet feeder and the paper separation roll, the stability of paper separation is determined by the correlation between the thickness of the paper and the area of the claws in contact with the paper. is determined, so it has the disadvantage that it is not possible to widely separate postcards, envelopes, etc. from ordinary copy paper.

[Means to solve the problem]

The sheet feeder of the present invention has a claw section and a friction separation plate for setting paper in a paper cassette and peeling off the paper sheet by sheet in cooperation with a paper separation roll. - Features a spacer that can be easily moved relative to the claw so that either friction separation method can be selected.

〔Example〕

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

FIG. 1 is a perspective view of an embodiment of the present invention. FIGS. 2 and 3 are cross-sectional views showing the paper route of the spacer movable section.

The paper cassette 1 is provided with a movable spacer 3 having a claw portion 2, and a friction separation plate 4 is provided on the paper feeding surface. The paper separation roll 5 receives power to rotate in the paper feeding direction. Furthermore, a plate 6 and a spring 7 are provided on the paper cassette 1 in order to press the paper against the separation roll 5.

Next, to explain the operation, when peeling cut paper (high-quality paper, copy paper, etc.) sheet by sheet, the spacer 3 is slid into the storage section 8 of the paper cassette 1 (in direction a) and stored. When the end portion catches the claw portion 2, the paper is peeled off by the rotation of the separation roll 5 and the action of the claw portion 2.

Next, when separating thick paper such as postcards and envelopes one by one, by sliding the spacer 3 to the avoidance feeding line of the claw part 2 of the paper cassette 1, the rotation of the separation roll 5 and the paper feeding surface of the paper cassette 1 The paper is separated by the action of the frictional separation plate 4 located at .

〔Effect of the invention〕

As explained above, the present invention provides a sheet feeder in which the paper cassette part is provided with a claw part and a frictional separation plate, and paper can be separated from thin paper to thick paper by switching the paper feeding side using a movable spacer. There is an effect that can be supplied.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a perspective view of an embodiment of the present invention. FIG. 3 is a sectional view showing the paper route of the spacer movable section, and FIG. 4 is a perspective view showing a conventional example. DESCRIPTION OF SYMBOLS 1... Paper cassette, 2... Claw part, 3... Movable spacer, 4... Friction separation plate, 5... Paper separation roll, 6... Plate, 7... Spring, 8・
...Storage section, a...Sliding direction.

Claims (1)

[Claims] When paper is set in the paper cassette, it has a claw section and a friction separation plate to separate the paper sheet by sheet in conjunction with a paper separation roll. Depending on the paper thickness, either the claw method or the friction separation method can be used. A sheet feeder characterized by having a spacer that can be easily moved with respect to the claw part so that it can be selected.