JPS59214064A - Fixing device of copying machine - Google Patents

Abstract

PURPOSE:To remove easily and, safely a jamming form by providing a tension spring between the supporting member for a exfoliating pawl and the upper wall of a frame, and allowing the supporting member to turn up to a maximum release position through the toggle operation of the spring. CONSTITUTION:If the supporting member 14 for the exfoliating pawl 11 is at a neutral point as shown in a figure when a paper jam occurs in a fixing device, it is impossible to insert a hand into a roll part if the removal of jamming form is intended. For the purpose, an operator elevates the supporting member 14 slightly from the neutral point, and then the supporting member 14 rotates to the maximum release position automatically by the toggle operation of the tension spring 16, so that a take-out port is opened to a maximum as shown in a figure and held in the state. Consequently, the jamming form is removed easily and safely.

Description

[Detailed description of the invention] (Scope of professional use) The present invention relates to a fixing device for a V1 machine.

(Prior Art) As shown in Fig. 1, a conventional hot roll fixing device in a single glue machine is equipped with a fixing unit located diagonally behind a fixing unit consisting of a heating roll 1 and a pressure roll 2 arranged in a pair above and below inside the machine. Shaft 3T- at the top
A paper guide plate 5 is provided at the bottom of the support member 4, and a mounting plate 6 is used at the tip of the paper guide plate 5 to attach a paper peeling claw T. By arranging the cutting edge of the mounting and peeling claw 1 so as to touch the outer periphery of the rear part of the heating roll 1, the toner image formed on the surface of the photoreceptor at a transfer point (not shown) of the photoreceptor is removed. The sheet of paper conveyed with unfixed image transferred thereto is fixed by heat-pressing with the curved heating roll 1 and the pressure roll 2, and is peeled off from the surface of the heating roll 10 by the peeling claw T, and then transferred to the paper guide 5. The paper was configured to be conveyed along the line to a discharge roll section (not shown). However, in the fixing device having such a configuration, a jam occurs in the roll section 1, and in order to remove this, the support member 4 to which the peeling claw T is attached is rotated upward about the shaft 1 to remove the paper. When trying to widen the outlet of the support member 4, the support member 4 has a neutral position claw, and even if the cane operator releases his/her hand at this position, the support member 4 remains stopped as shown in FIG. It is common to remove jammed paper in this state, but
If the above-mentioned work is carried out with the supporting member 4 in such an unstable state, there is a high possibility that the peeling claw 7 will fall due to the vibration during the work, and there is a great danger of injuring the operator's hands. There were drawbacks.

(Object of the Invention) The present invention has been made in order to eliminate the drawbacks of the conventional fixing device described above. In this position, the operator cannot insert his/her hand into the device, and when the support member is lifted upwards even slightly beyond this neutral position, the toggle action of the spring acts and automatically opens the support member to its maximum opening position. It is an object of the present invention to provide a fixing device which makes it easy to take out jammed paper by rotating the fixing device to a fixed position, and which prevents an operator from being slightly injured during the operation.

(Structure of the Invention) The present invention will be described in detail below based on embodiments shown in the drawings.

FIG. 3 is a sectional side view showing an embodiment of the fixing device of the present invention.

A peeling claw 11 is fixed using a support plate 12 at the upper rear side of the fixing unit, which is composed of a pair of heating rolls 8 and a pressure roll 10 arranged in the frame 8 of the fixing device. A support member 14 having a reverse rotation shape with a paper guide plate 13 attached thereto is rotatably attached to the lower part using a shaft 15, and a tension rod is attached to a suitable position on the back surface of the support member 14 and a suitable position on the upper side of the frame 8. A spring 16 is provided to provide a toggle effect on the rotation of the support member 14.

The present invention is constructed as described above. Next, its operation will be explained.

Suppose that a paper jam occurs in the fixing device. In order to remove this, the operator pulls up the support member 14 of the peeling claw 11 to open the outlet. At this time, even if the support member 14 is stopped at the neutral point of arrow A as shown in FIG. The distance between the support member 14 and the paper guide plate 1T provided at the paper guide plate 1T is narrow, and the operator cannot insert his/her hand into the roll section. Therefore, the operator has to pull the support member 14 further upward. Then, when the operator touches the support member 14 by pulling the support member 14 slightly above the neutral point position or by inserting his hand into the outlet, the support member 14 becomes resilient to the tension spring 160. In other words, the toggle action is activated and the outlet is automatically rotated to the maximum open position shown at 13 in the figure, and the outlet is opened to the maximum.

The present invention is configured and operates as described above.
The tension spring 16 is used to lower the neutral position of the support part #14, so that the operator cannot insert his hand into the device at this position, so paper removal work at this position is easy. Naturally, this cannot be done, and therefore the operator will not suffer minor injuries to his/her hands due to the peeling claw 11. Also, if the support portion 1f 414 is lifted upward beyond this neutral point even a little, the toggle action by the tension spring 16 will work. Since the supporting member is rotated to the maximum release position fii' and fixed there, there is no chance of the support member falling off during the paper removal operation, and the operator's safety during the operation is therefore fully ensured. This has the effect of allowing you to work with peace of mind.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional side view showing the state of a conventional fixing device in use, FIG. 2 is a cross-sectional side view showing the state during paper removal work during the same process, and FIG. FIG. 4 is a cross-sectional side view of an embodiment of the fixing device of FIG. In the figure 8...Frame, 9...Heating roll, 10
..." Adding EE roll, 11...-Peeling claw, 12...Fist...Support plate, 13...Paper guide plate, 14...
Support member, 15...shaft, 16... tension spring. Patent applicant Fuji Xerox Co., Ltd. 7- Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A supporting member provided with a peeling claw is rotatably attached to the upper part of the rear steel of the fixing part, which is composed of a pair of upper and lower heating rolls and a pressure roll placed at appropriate positions in the frame, using a shaft. A tension spring is provided between the support member and the upper side wall of the frame, and is provided so as to toggle the spring toward the maximum release position, so that the support member can be stopped at a neutral position in the rotation range circle. A fixing device for a copying machine, wherein the fixing device for a copying machine is made such that paper removal work cannot be performed when the support system is stopped at the lowered position.