JPH05142894A - Paper feeding device - Google Patents

Abstract

PURPOSE:To easily enable stable separation and carrying of a roll member by controlling rotation of the roll member based on a detection signal of a tip-end detecting means for detecting the tip end of the roll member. CONSTITUTION:When a roll paper 1 is stored in a paper feeding device and this paper feeding device is set on a copying machine body, a pickup roller 2, a separation claw 5 and a tip-end detection sensor 6 are brought into contact with the circumferential face of the roll paper 1. Then, the roll paper 1 is rotated and the pick up roller 2 is also rotated with it. When the tip end of the roll paper 1 is detected by the tip-end detection sensor 6, the tip end of the roll paper 1 is rotated by the tip-end detection sensor 6 by a predetermined angle and stopped. Moreover, as the pickup roller 2 is rotated, the roll paper 1 is driven and rotated, and the tip end of the roll paper 1 is carried to a feed roller 3 (driving) and a feed roller 4 (driven) following a carrying guide 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding device, and can be applied to a paper feeding device for supplying a roll-shaped member such as a film, a tape or a metal. The present invention relates to an improvement of a paper feeding device that supplies rolled paper.

[0002]

2. Description of the Related Art A conventional paper feeder is disclosed in Japanese Examined Patent Publication No. 47.
No. -18582, there is a roll mounted in a housing on a rotatable core so that the surface is exposed for driving on the surface. Is provided with a stripping device that is selectively biased with respect to the outer surface of the roll so that the leader portion is picked up and guided by the guide track. And, in order to rotate the roll so that the surface drive belt starts the peeling action, there is formed a guide for the leader part which is arranged close to the strip and comes together.

[0003]

In the sheet feeding device of the conventionally known image forming apparatus, the operator must insert the leading end of the roll-shaped copy sheet into the roller used for conveyance when setting the roll-shaped copy sheet. There was a problem that it was troublesome. Further, in the above-described conventional paper feeding device, when the roll is not housed in the housing, it is very difficult to surely bring the tip of the roll to the strip-shaped material peeling device, and even if it is housed in the housing. If the roll member is made of a material having a low stiffness, the tip of the roll member is bent and the inside of the housing is clogged, so that the roll member becomes defective before the peeling, and there is a problem that it is difficult to stably peel and convey the roll member.

Therefore, according to the present invention, the leading end of the roll member can be peeled and brought to a conveying device without loosening the roll member, and stable feeding and peeling of the roll member can be easily performed. The purpose is to provide a device.

[0005]

According to the present invention, there is provided a supporting device for rotatably supporting a roll member formed in a roll shape, and a peeling device for abutting the peripheral surface of the roll member and peeling the tip of the roll member. In a paper feeding device that has a device and a rotating device that abuts on the peripheral surface of the roll member and rotates the roll member, in a paper feeding device that separates and conveys the leading end of the roll member, the peripheral surface of the roll member The leading edge detecting means for detecting the leading edge is provided, and the rotation controlling means for controlling the rotation of the roll member based on the detection signal of the leading edge detecting means is provided.

[0006]

According to the present invention, the leading edge detecting means for detecting the leading edge of the roll member is provided on the peripheral surface of the roll member, and the rotation controlling means for controlling the rotation of the roll member based on the detection signal of the leading edge detecting means is provided. The rotation of the roll member can be appropriately controlled on the basis of the detection signal of the front end detection means for detecting the front end of the roll member provided on the peripheral surface of the roll member. Therefore, the end of the roll member can be peeled and brought to the conveying device without loosening the roll member, and stable peeling and conveyance of the roll member can be performed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 is a diagram showing a configuration of a sheet feeding device according to an embodiment of the present invention, FIG. 2 is a diagram showing an operating state of a movable portion of the sheet feeding device shown in FIG. 1, and FIG. 3 is a sheet feeding shown in FIG. FIG. 4 is a flow chart showing the flow of control of the apparatus, FIG. 4 is a diagram showing the steps of separating and conveying the sheet feeding device shown in FIG. 1, and FIG. 5 is a diagram showing the separation of the sheet feeding device shown in FIG. It is a figure which shows the state which contacted. 1 to 5, 1 is roll paper formed in a roll shape, 2 is a pickup roller arranged in contact with the roll paper 1, and 3 and 4 are arranged in the traveling direction of the roll paper 1. Feed roller. Here, the feed roller 3 is a drive side feed roller, and 4 is a driven side feed roller. Next, 5 is a separation claw for separating the roll paper 1, and 6 is a front end detection sensor for detecting the front end of the roll paper 1. And 7 is roll paper 1
Is a setting completion detection sensor, and 8 is a conveyance guide when the roll paper 1 is conveyed.

Next, the operation of this paper feeding device will be briefly described. Here, as shown in FIGS. 1 and 2, when the roll paper 1 is stored in a paper feeding device and the paper feeding device is set in the main body of the copying machine, the pickup roller 2, the separating claw 5, and the leading edge detection sensor 6 are rolled. It is abutted on one circumferential surface. (Fig. 5). Then, the roll paper 1 is rotated in the direction as shown in FIG.
The pickup roller 2 is also driven to rotate in the direction. Next, when the leading edge detection sensor 6 detects the leading edge of the roll paper 1, the leading edge of the roll paper 1 is rotated by "α" from the leading edge detection sensor 6 and stopped. At this time, the angle from the tip detection sensor 6 to the separation claw 5 is “β”, and the angle from the tip detection sensor 6 to the pickup roller 2 is “γ”.
Then, “α” is controlled so that “β <α <γ” holds. Next, as the pickup roller 2 is rotated in the direction, the roll paper 1 is driven to rotate in the direction, and the leading end of the roll paper 1 is transported to the feed roller 3 (driving) and the feed roller 4 (driven) according to the transport guide 8. It

If the leading end of the roll paper 1 is not peeled off, the roll paper 1 is peeled off by the separating claw 5 and is conveyed in the same manner as described above.
Then, when the leading end of the roll paper 1 conveyed by the feed roller 3 (driving) and the feed roller 4 (driven) is detected by the setting completion detection sensor 7, the rotation of the pickup roller 2 and the feed roller 3 (driving) is stopped. The pickup roller 2, the separation claw 5, and the leading edge detection sensor 6 are released from the contact with the roll paper 1, and the paper feed preparation is completed.

When the roll paper 1 rotates in the direction of, a braking force acts on the shaft supporting the roll paper 1 to prevent over-rotation. As described above, in this embodiment, the leading edge detection sensor 6 that detects the leading edge of the rolled paper 1 is provided on the circumferential surface of the rolled paper 1, and the rotation control unit that controls the rotation of the rolled paper 1 based on the detection signal of the leading edge detection sensor 6. Since the above configuration is provided, the rotation of the roll paper 1 can be appropriately controlled based on the detection signal of the leading edge detection sensor 6 that detects the leading edge of the roll paper 1 provided on the circumferential surface of the roll paper 1. For this reason, the tip of the roll paper 1 is peeled off without loosening the roll paper 1,
The roll paper 1 can be brought to the transport device, and the roll paper 1 can be stably peeled and transported.

[0011]

According to the present invention, the leading end of the roll member can be peeled and brought to the conveying device without loosening the roll member, and stable peeling and conveyance of the roll member can be easily performed. There is an effect.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a paper feeding device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an operating state of a movable portion of the paper feeding device shown in FIG.

FIG. 3 is a flowchart showing a control flow of the paper feeding device shown in FIG.

FIG. 4 is a diagram showing a process of separating and conveying the paper feeding device shown in FIG.

FIG. 5 is a diagram showing a state in which the sheet feeding device shown in FIG.

[Explanation of symbols]

 1 Roll Paper 2 Pickup Roller 3, 4 Feed Roller 5 Separation Claw 6 Tip Detection Sensor 7 Set Completion Detection Sensor 8 Transport Guide

Claims (1)

[Claims] 1. A support device for rotatably supporting a roll member formed in a roll shape, a peeling device for abutting the peripheral surface of the roll member and peeling the tip of the roll member, and the peripheral surface of the roll member. And a rotating device for rotating the roll member, the front end detecting means for detecting the front end of the roll member on the peripheral surface of the roll member in a paper feeding device for separating and conveying the front end of the roll member. A sheet feeding device provided with rotation control means for controlling rotation of the roll member based on a detection signal of the leading edge detection means.