JPS5897073A - Form peeling device - Google Patents

Abstract

PURPOSE:To obtain an inexpensive device of simple structure by providing a single peeling pawl as an initial point of peeling and a guide for peeling range expansion from near the tip of the pawl in a form width direction. CONSTITUTION:A form after transfer reaches a fixing device 1 where toner is fixed between a rotating heat roll 2 and a pressure roll 3, and the form after the fixation is ejected successively while stuck to the heat roll 2. Then, the tip of a peeling pawl 7 is pressed against the surface of the heat roll 2 on a form ejection side, so one head part of the form is peeled off from the surface of the heat roll 2 by the peeling pawl 7 and as ejection advances, the form peeled at the head end moves successively onto a guide 8 while the peeling advance toward a side plate 5; and the peeled form is supported on a guide plate 9 and sent out successively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to a paper peeling device in a fixing device using a heating roll of an electrophotographic apparatus.

Conventional paper peeling devices equipped with peeling claws
Although a plurality of peeling claws are used depending on the paper width, as the number of peeling claws increases, the number of peeling errors increases and the reliability of the apparatus decreases. Therefore, there were also strict requirements for the manufacturing and finishing accuracy of the peeling claw.

The present invention has solved the above problem, and its purpose is to provide a paper peeling device that causes fewer peeling errors and is inexpensive to manufacture.

That is, the present invention provides an apparatus for peeling paper from a roll using a peeling claw, which includes a single peeling claw for a peeling starting point;
This device is equipped with a guide for expanding the peeling range that is disposed near the tip of the peeling claw in the width direction of the paper, and the single peeling claw serves as the starting point for separating the paper from the heating roll. As paper ejection progresses due to the rotation of the heating roll, the paper peeling range is expanded by the guide. Therefore, the paper is reliably peeled off, and the number of peeling errors is reduced.

Further, since only - number of peeling claws are used, the structure is simplified and costs are reduced.

An embodiment of the present invention shown in FIG. 1 will be described below.

In the fixing device IT1 in the electrophotographic apparatus, a pair of upper and lower rolls consisting of a heating roller, a roller 2, and a pressure roller 3 are rotatably supported by a predetermined support member. When rotatably supported, a peeling claw 7 is provided whose tip is brought into contact with the surface of the heating roll 2 by being biased by a spring 6 whose one end is fixed to the support member 4, At the paper discharge section of a pair of rolls consisting of roll 2 and pressure roll 3,
A guide plate 9 is disposed to guide the ejected paper from below, and a side plate 5 is disposed at a side position of the shaft end of the pressure roll 3 (a position on the other end side with respect to the support member 4). A guide 8 is rotatably spanned between the support portion 5a and the vicinity of the tip of the peeling claw 7 in parallel with the guide plate 9 and gradually away from the surface of the heating roll 1.

The embodiment shown in FIG. 1 is constructed as described above, and the paper after the transfer reaches the fixing device and is placed between the rotating heating roll 2 and pressure roll 3 on the paper surface. After the toner has been fixed, the sheets of paper that have been fixed are sequentially discharged while being attached to the heating roll 2.

However, since the tip of the peeling claw 7 is pressed against the surface of the heating roll 2 on the paper ejection side, one end of the paper is peeled off from the surface of the heating roll 2 by the peeling claw, and the progress of ejection is interrupted. At the same time, the sheets of paper peeled off at the one end sequentially ride on the guide 8, and peeling progresses toward the side plate 5, and the peeled sheets are supported by the guide plate 9 and sent out one after another.

The above-mentioned embodiment is constructed and functions as described above, but the paper that has been started to be peeled off by the peeling claw 7 is gradually removed in the width direction by the guide 8 that is arranged to gradually move away from the surface of the heating roll 2. It peels off easily and there are fewer mistakes in peeling.

The guide 8 also includes the peeling claw 7 and the support portion 5a of the side plate 5.
Since the peeling claw 7 is rotatably supported by the peeling claw 7, the movement of the peeling claw 7 is not restricted, and the tip thereof is always pressed against the surface of the heating roll 2 by being biased by the spring 6.

Furthermore, only - number of peeling claws 7 are used;
The structure is simplified and the device manufacturing cost is low.

Next, another embodiment shown in FIG. 2 will be described.

Heating roll 2, pressure roll 3, measurement 5, guide I! I The arrangement of the plate 9 is the same as that of the fixing device shown in 1; an open lower a formed near the tip of the peeling claw 7; and each roll 2;
A guide wire 1 is spanned across 10 so as to be inclined to the surface of the heating roll 2 and parallel to the guide surface of the guide plate 9 .

The embodiment shown in FIG. 2 can basically achieve the same effect as the embodiment shown in FIG. Because of this, when the paper number is ejected after fixing and adheres to the surface of the heating roll 2, it starts to peel off at the center in the width direction.
As the heating roll 2 rotates, the peeling range is sequentially expanded in the left and right directions along the guide wire 1.The guide wire 1 has a simpler shape and is less expensive to manufacture than the guide 8 shown in FIG. Moreover, since it is lightweight, the influence on the movement of the peeling claw 7 is extremely small.

In addition to the paper peeling device shown in FIGS. 1 and 2 above,
In place of the guide 8 (plate-shaped body) in FIG. 1, a guide wire as shown in FIG.
A plate-shaped guide as shown in FIG. 1 may be provided in place of the guide wire 11 shown in the figure, and similar effects can be obtained.

Although the present invention has been described above in detail with respect to the embodiments shown in the drawings and the embodiments not shown in the drawings, the present invention is not limited to such embodiments and can be modified without departing from the spirit of the invention. The design can be freely modified as necessary.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram of a paper peeling device according to an embodiment of the present invention, and FIG. 2 is a schematic explanatory diagram of a paper peeling device according to another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Fixing device, 2... Heating roll, 3... Pressure roll, 4... Supporting member, 5... Side plate, 6... Spring, 7... Peeling claw, 8... ...Guide, 9...
Guide plate, lO... side plate, 11... guide wire,

Claims (1)

[Claims] A device for peeling paper from a roll using a peeling claw, comprising a single peeling claw for a peeling starting point, and a guide for expanding the peeling range disposed near the tip of the peeling claw in the width direction of the paper. A paper peeling device characterized by: