JPH0544833Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> This invention relates to a paper guiding guide that guides a paper carrying unfixed toner to a fixing roller consisting of a pair of rollers.

<Prior art and its disadvantages> Generally, a paper guide that guides paper with unfixed toner to a fixing roller consisting of a pair of rollers is arranged with its leading end facing toward the upper roller. . By doing this, the paper is squeezed by the tip of the paper guide, and the paper is prevented from wrinkling. However, if the friction between the paper and the upper surface of the guide is large, the amount of force applied to the paper at the tip of the guide will be very strong, and while wrinkles may be prevented, there is a problem in that unfixed toner on the paper may be disturbed. . Conventionally, therefore, the upper surface of the guide is coated to prevent the friction between the paper and the upper surface of the guide from becoming larger than necessary. FIG. 3 shows a schematic diagram of the vicinity of a fixing roller using a paper conveyance guide whose upper surface is coated. In the figure, numerals 1 and 2 are an upper roller and a lower roller, respectively, constituting a fixing roller, and numeral 3 is a paper conveyance guide whose upper surface is coated.

In the paper conveyance guide having such a structure, the upper surface of the guide is coated, so that the frictional force with the paper does not become larger than necessary. Therefore, the degree of squeezing at the tip of the guide becomes appropriate, making it possible to prevent wrinkles and also to prevent unfixed toner from being disturbed. However, since the upper surface of the guide is coated, the paper may not be conveyed along the coated surface. That is, as shown by the dotted line in FIG. 3, the paper 4 may be conveyed directly to the fixing roller without following the guide 3. In this case, there is an inconvenience that the effect of squeezing the paper at the leading end of the guide is weakened. In other words, in conventional paper conveyance guides, the top surface of the guide was coated, so
There have been cases where the conveyance of the paper by the guide becomes unstable, and the paper is not conveyed along the guide but directly enters the fixing roller section, making it impossible to squeeze the paper sufficiently.

<Purpose of the invention> The purpose of this invention is to eliminate the above-mentioned drawbacks and to provide a paper conveyance guide to the fixing roller that can always stably prevent wrinkles and unfixed toner from being disturbed. .

<Structure and effects of the invention> This invention is a paper conveyance guide that guides paper with unfixed toner to a fixing roller consisting of a pair of rollers. is arranged, and the upper surface of the guide body except for the tip is covered with a resin that generates static electricity due to friction with paper, and the tip is covered with an antistatic material.

According to this invention configured as described above, since the upper surface of the guide body is covered with resin, static electricity is generated due to friction when paper passes over the resin. Therefore, the paper is conveyed while being attracted to the resin surface due to this static electricity. In other words, the paper never leaves the guide and is conveyed directly to the fixing roller. Further, since the tip of the guide, which is the part for squeezing the paper, is covered with an antistatic material, static electricity is not generated in this part. That is, a large force acts on the paper in this part, but if static electricity is generated in this part, there is a possibility that the unfixed toner on the paper will be disturbed by the static electricity. However, in this invention, the tip of the guide is covered with an antistatic material to prevent static electricity from being generated at the tip of the guide, thereby making it possible to prevent unfixed toner from being disturbed by static electricity. As described above, according to this invention, it is possible to prevent both paper wrinkles and unfixed toner from being disturbed.

<Example> FIG. 1 is a schematic diagram of the vicinity of a fixing roller using a paper conveyance guide according to an example of this invention.
Further, FIG. 2 shows an enlarged view of the paper conveyance guide.

The difference in configuration from the conventional paper conveyance guide shown in FIG. 3 is that as shown in FIG. The tip is coated with antistatic paint 33 via the Surf Acer 31. As in the prior art, the paper conveyance guide 3 is disposed with its leading end facing toward the upper roller 1.

With this configuration, in the paper conveyance guide of this embodiment, when the paper 4 is conveyed, static electricity generated by friction with the epoxy paint 32 causes the paper 4 to be attracted to the surface of the epoxy paint 32 while being conveyed. Ru. Therefore, the paper 4 is always conveyed along the guide 3 as shown in FIG. For this reason, the paper is always rubbed stably at the leading end of the guide, and wrinkles can be prevented. Also, the tip of the guide is coated with antistatic paint 33.
is applied, so no static electricity is generated in this area. Therefore, it is possible to prevent unfixed toner from being disturbed due to static electricity at the tip of the guide where a large force is applied to the paper. In this embodiment, the epoxy paint 32 is used as the resin, but any resin that generates static electricity due to friction with the paper 4 may be used.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of the vicinity of the fixing roller using a paper conveyance guide, which is an embodiment of this invention.
The figure is an enlarged view of the paper conveyance guide, and FIG. 3 is a schematic diagram of the vicinity of the fixing roller using the conventional paper conveyance guide. 1... Upper roller, 2... Lower roller, 3... Paper conveyance guide, 4... Paper, 30... Guide body,
32... Epoxy paint, 33... Antistatic paint.

Claims (1)

[Claim for Utility Model Registration] In a paper conveyance guide that guides paper with unfixed toner to a fixing roller consisting of a pair of rollers, the guide body is arranged with the tip of the fixing roller side facing toward the upper roller. At the same time, the upper surface of the guide body except for the tip is covered with a resin that generates static electricity due to friction with the paper, and the tip is covered with an antistatic material. Transport guide.