JPH069101A - Sheet transport guide - Google Patents

Abstract

PURPOSE:To prevent the occurrence of noises by shifting the sheet carrying direction position for delivering a sheet material from one guide to the other guide in the width direction and by gently applying from part of the sheet material to the other guide without rapidly applying the whole sheet material to the other guide. CONSTITUTION:A sheet material S is carried in the arrow direction by means of a carrying roll 4. In this case, a first guide member 1 is provided with a plurality of ribs 11-15. Each point 1a-1e for delivering respective back end, namely the sheet material S to a second guide member 2 is mutually shifted in the carrying direction. The second guide 2 is formed into comb tooth structure having a plurality of ribs. In addition, the second guide 2 forms outwardly a step in the curved direction against the first guide 1 to form constitution so that the tip of the sheet material S may not be hooked. The sheet material S is delivered from the first guide l to the second guide 2 by succesively passing through each point 1a-1e. Therefore, the sheet material S is gently applied to the second guide 2 without rapidly applying the whole sheet material to the second guide 2, preventing the occurrence of noises.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying guide which is applied to a copying machine, a laser printer or the like and which guides a conveyed sheet material.

[0002]

2. Description of the Related Art Conventionally, a guide plate or the like has been used as a sheet material conveying mechanism in a copying machine, a laser printer or the like. The guide plate etc. may be divided due to jam processing, molding restrictions, etc. FIG. 7 shows a conventional example. A conveying roller 4 rotates in the arrow direction to send out the sheet material S in the arrow A direction. The first guide plate 1 has a comb-like shape. The second guide plate 2 has a comb-like shape.

Here, an appropriate step a is provided so that the leading end of the sheet material S is not caught on the second guide plate 2 when the sheet material is conveyed.
It is common to put on.

[0004]

However, in the above configuration, when the rear end of the sheet material S passes the end portion 1a of the first guide plate 1, the rear end of the sheet material S has the rigidity of the sheet material S. In the figure, the position changes from the solid line position to the dotted line position. As a result, there is a drawback that noise is generated. Particularly in recent years, with the advent of laser printers and the like, noise from other than the sheet material conveying path has been reduced, and noise from the sheet material has become a relatively large problem. Further, due to the demand for downsizing of the device, the curvature of the curved conveyance path is becoming tighter, and noise tends to increase more and more.

[0005]

According to the present invention, the first guide member and the second guide member downstream of the first guide member are provided outside the curved conveying path, and the sheet material is used as the first guide member. By changing the position of the sheet conveying direction from the first guide member to the second guide member, the rear end of the sheet material gently moves from the first guide member to the second guide member to prevent noise generation. It was done.

[0006]

EXAMPLE FIG. 1 shows an example of the present invention. Numerals 4 and 5 are pairs of conveying rollers that rotate in the arrow direction and convey the sheet material in the arrow A direction. Reference numeral 1 is a first guide, which is a plurality of ribs 11, 12, 1
3, 14, and 15, the rear end of each rib, that is, the point at which the sheet is transferred to the second guide 2, is configured to be displaced in the transport direction at each rib. The points are 1a, 1b, 1c, 1d, and 1e. The second guide 2 also has a comb tooth structure having a plurality of ribs
A step is formed in the outward direction of the curve with respect to the guide so that the tip of the sheet is not caught. 2 is shown in FIG.
It is the figure seen from above. With the above configuration, the rear end of the sheet material starts to be transferred to the second guide plate 2 when it reaches the point 1a, but at this time, only a part of the sheet material S, that is, the rib 1
The part that was guided in 1 is delivered. Then, points 1b, 1c, 1d, and 1e are sequentially transferred. Therefore, the entire rear end of the sheet material does not abruptly hit the second guide plate but gently hits, thereby preventing noise generation. The above shape is advantageous for the molding plate for molding.

(Other Embodiments) FIG. 3 shows the second embodiment and FIG.
FIG. 4 is a top view of FIG. 3. The sheet material conveying direction is indicated by arrow A. The end portion of the first guide plate 6 has a shape in which it is obliquely changed from 61 to 62 continuously. The end portion of the second guide plate 7 also changes similarly. The above-mentioned configuration also has the same effect as that of the first embodiment. Further, the above-mentioned structure has a shape that is easily applied to a metal guide plate.

FIG. 5 is a third embodiment, and FIG. 6 is a top view of FIG. Similarly, the sheet material conveying direction is indicated by arrow A. The end portion of the first guide plate 8 is the end portion in the width direction of the sheet material.
1, 83 and 82 at the center of the width direction of the sheet material, which has a chevron shape as a whole. The above-mentioned configuration also has the same effect. Further, in the case of the above configuration, since it has a symmetrical shape in the width direction of the sheet material, it is effective when used particularly in a portion where conveyance accuracy is required.

[0009]

As described above, the position where the sheet material is transferred from the guide member on the upstream side to the guide member on the downstream side is displaced in the sheet material width direction and in the sheet material conveying direction. There is an effect that it is possible to prevent the generation of noise.

[Brief description of drawings]

FIG. 1 is a first embodiment of the present invention.

FIG. 2 is a top view of FIG.

FIG. 3 shows a second embodiment.

FIG. 4 is a top view of FIG.

FIG. 5 shows a third embodiment.

FIG. 6 is the embodiment of FIG.

FIG. 7 shows a conventional example.

[Explanation of symbols]

 1 1st guide 2 2nd guide

Claims (1)

[Claims] 1. A sheet material is transferred from the first guide member 1 to the guide member 2 by having a first guide member and a second guide member downstream of the first guide member on the outside of the curved conveyance path. A sheet conveyance guide characterized in that the position in the sheet conveyance direction that is passed between the sheet and the sheet changes in the width direction.