JPH02132269U - - Google Patents

Description

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing the internal structure of an electronic copying machine;
Fig. 2 is an external perspective view of the electronic copying machine shown in Fig. 1, and Fig. 3 shows the front and rear support plates of the support device removed, the lock device and oil guide omitted, and a part of the electronic copying machine shown in Fig. 1. a front view of the fixing device shown in cross section;
Fig. 3a is a perspective view showing an example of a method of supporting the first transport roller, Fig. 3b is an explanatory diagram showing the advantage when supporting a plurality of first transport rollers independently, and Fig. 3c is a perspective view showing an example of a method of supporting the first transport roller. An explanatory diagram showing a problem when the first conveyance roller is supported by a common shaft. Figure 3d is a cross-sectional view of the first conveyance roller. Figure 4 shows the relative relationship between the oil guide, the support device, and the fixing roller. FIG. 5 is a perspective view of the fixing device, with other elements omitted for clarity, and FIG. 5 is a front view of the fixing device, showing the lock shown in FIGS. FIG. 6 is a horizontal sectional view showing how the fixing roller is supported, and FIG. 7 is a diagram showing the relative positional relationship between the fixing roller and the entrance guide plate, with the fixing roller shown in an exaggerated manner. FIG. 8 is a perspective view of the oil sump, FIG. 8a is a sectional view showing another embodiment of the preventive liquid coating device, and FIG.
FIG. 9 is a perspective view showing the oil sump of the embodiment shown in FIG. FIG. 11 is a simplified cross-sectional view of each receiving member; FIG. 11 is a plan view of the recovery oil pan; FIG. 12 is a simplified partial cross-sectional view of the structure for removing silicone oil attached to the pressure roller; Figure 13 is a view similar to Figure 3, showing the oil application unit removed and supported by the stay, Figure 14 is a partially sectional plan view showing the locking device, and Figure 15 is a front view of the locking device. , FIG. 16, and FIG. 17 are partially sectional plan views illustrating the operation of the shield for a connector. 2... Heater, 4... Fixing device, 12... Fixing roller, 13... Pressure roller, 34... Second conveyance roller, 35... First conveyance roller, 48... Spring, 448... Tube, 449...core member, 45
0...Unevenness.

Claims (1)

[Claims for Utility Model Registration] (1) A recording material carrying an unfixed toner image is passed between a fixing roller heated by a heater and a pressure roller that is in pressure contact with the fixing roller as a pair. After the image is fixed on the recording material, the recording material is transported and discharged by a first transport roller, which the surface of the recording material carrying the fixed toner image comes into contact with, and a second transport roller that is paired with the first transport roller. A fixing device characterized in that the surface of the first conveying roller is formed to have a surface roughness with an average protrusion height of 3 μm or less. (2) The fixing device according to claim 1, wherein the first conveyance roller includes a central columnar core member and a heat-shrinkable tube coated on the surface of the core member. (3) The fixing device according to claim 2, wherein unevenness is formed on the surface of the core member to prevent displacement of the tube. (4) The first conveyance roller is configured as a driven roller rotated by a second conveyance roller, and a plurality of the first conveyance rollers are arranged in the axial direction, and each of the first conveyance rollers are independently supported so as to be movable toward or away from the second conveyance roller, and are pressed against the second conveyance roller by a spring. The fixing device according to any one of the above.