JPH0318441Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> This invention is a method for transporting transfer paper in a copying machine that forms an electrostatic latent image on a photoreceptor, develops it with toner, etc., and transfers it to transfer paper. Regarding equipment.

<Prior Art> An example of a conventional copying machine is shown in the schematic side view of FIG. 3, the perspective view of the photoreceptor in FIG. 4, and the side view of FIG. 5 shows the transfer paper conveying device. The structure shown in is known.

In the figure, 1 is a main body frame of the copying machine, and 2 is a document table disposed above the main body frame on which a document is placed; in other words, it is a moving body during exposure. 3 is an exposure light source, 4 is a lens array, 5 is an endless belt-shaped photoreceptor (master) wound around a small diameter drum 6 and a large diameter drum 7, 8 is a developing cleaning unit,
9 is a static eliminator, 10 is a transfer device, 11 is a paper feed cassette, 12 is a paper feed roller, and 13 and 14 are conveyance rollers. Reference numeral 15 denotes a transfer paper conveyance path consisting of paper guides 16 and 17. In the copying process, as is well known, the document table 2 starts first, then the transfer paper 18 is fed and conveyed, and then the transfer paper 18 is conveyed again to the transfer device 10.

Further, as shown in FIG. 4, signal holes P3 and P for outputting timing signals to one end of the photoreceptor 5
4 and P5 are provided at appropriate intervals, and a pair of light emitting elements 19 and 20 are provided in the path of the signal hole. Then, the transfer paper 18 is fed, for example, when the light emitting element 20 detects the signal hole P4 of the first rotation. However, when the signal hole P4 is detected in the second and third rotations, the prohibition circuit is activated and paper is not fed.

Next, a description will be given of a transfer paper conveyance device including a stopper plate 21 provided in the middle of the conveyance path 15 of the transfer paper 18 and a stop release mechanism for the transfer paper 18 stopped by the stopper plate 21. The transfer paper 18 fed by the detection of the signal hole P4 is conveyed by the conveyance rollers 13 and 14, and comes into contact with the stopper plate 21 and is stopped. Conveyance roller 13,1
4 is an idle roller, and the leading end of the transfer paper 18 is connected to the stop portion 21a of the stopper plate 21.
It will not bend due to strong pressure. The movable piece 2a of the document table 2, which has already started feeding when the signal hole P4 is detected, moves the passive piece 22 around the axis B at almost the same timing as the detection of the signal hole P4 in the middle of the feed, as shown in FIG. The stopper plate 21 is rotated in the direction of the arrow, and the stopper plate 21 is rotated upward around the axis E by the interlocking mechanism 23. As a result, the restraint on the transfer paper 18 is released, and the transfer paper 18 is transported toward the transfer area by the transport rollers 13 and 14, which are continuously rotating.

Here, the release mechanism of the stopper plate 21, that is, the interlocking mechanism 23 of the movable piece 2a and the stopper plate 21 will be explained based on FIG. Original table 2
A protrusion-shaped movable piece 2a is provided at the lower part of the document platen 2, and comes into contact with the passive piece 22 while feeding the document table 2, and rotates it in the direction of the arrow to take the operating position 22A. The passive piece 22 is rotatably attached to a shaft A provided at the left-bent upper part of a rotating arm 24 having an inverted U-shape. The movement is restrained in a predetermined manner by a stop pin 25 at the center of the left bend of the rotary arm 24.
Thereby, when the driven piece 22 rotates in the direction of the solid line arrow, the rotating arm 24 rotates around the axis B together with the driven piece 22. Conversely, even if the movable piece 2a contacts the passive piece 22 from the opposite direction when the original platen 2 returns, only the passive piece 22 will be rotated in the direction of the dotted line arrow, resulting in the non-operating position 22B. Just,
The movement of the passive piece 22 is not transmitted to the rotating arm 24.

Note that the rotating arm 24 is rotatably supported by a shaft B fixed to the main body frame 1 at the center of the inverted U-shape. Further, the right-hand curved end of the inverted U-shaped rotary arm 24 and the upper part of the connecting member 26 are rotatably connected by a shaft C. The lower part of the connecting member 26 is rotatably supported by a side end of a stopper plate 21 provided inside the main body frame 1 and an axis D. The base end portion of the stopper plate 21 is rotatably held at a predetermined location on the main body frame 1 about an axis E. Further, the tip of the stopper plate 21 is bent to form a stop portion 21a, and the portion 21a is removably fitted into the holes 16a and 17a of the paper guides 16 and 17.

That is, a movable piece 2a is provided on a moving body during exposure such as the document table 2, and a passive piece 22 that receives the movement of the movable piece 2a is provided on the main body frame 1, and transfers the transfer paper 18 to the transfer device 10 and the device. A stopper plate 21 is provided to open and close the transfer paper conveyance path 15 between the conveyance rollers 13 and 14, and an interlocking mechanism 23 for interlocking the moving piece 2a and the stopper plate 21 is provided. When the movable piece 2a moves in one direction and operates the passive piece 22, the stopper plate 21 is moved upward, and when the movable piece 2a passes the passive piece 22, the stopper plate 21 is automatically moved by its own weight. The stopper plate 21 is configured not to operate when the movable piece 2a moves downward (drops) and further moves in the other direction.

In the above configuration, when no force is applied by the moving piece 2a, the stopper plate 21 is inserted into the stopper plate holes 16a, 17 of the paper guides 16, 17.
a, and the transfer paper 18 is in a state where its movement is restricted.

Now, when the movable piece 2a is feeding the document table 2, when it moves from right to left as shown in the figure and comes into contact with the driven piece 22, the driven piece 22 engages with the stop pin 25, and the driven piece 2a
2 and the rotating arm 24 rotate in the direction of the arrow around the axis B, the connecting member 26 moves upward, and the stopper plate 21
rotates around axis E in the direction of the arrow.

That is, the stopper plate 21 is connected to the transfer paper 18.
Rotate upward to release the restraint state. At this time, the transfer paper 18, which is always pushed toward the left side of the transfer device 10 by the transport rollers 13 and 14, starts to move (re-transport) due to the upward movement of the stopper plate 21. However, when the movable piece 2a passes the passive piece 22, the connecting member 26 and the stopper plate 21 each fall under their own weight and try to return to their original positions, and the stopper plate 21 rotates downward, and the stopper plate 21a comes into contact with the upper surface of the transfer paper 18, but
The transfer paper 18 continues to move, and when the transfer paper 18 runs out, the stopper plate 21 fits into the holes 16a and 17a.

When returning, the document table 2 and the movable piece 2a move from left to right and come into contact with the passive piece 22, but as described above, only the passive piece 22 rotates in the direction of the dotted arrow, and the moving piece 2a moves from left to right. No force is transmitted to the rotating arm 24, the connecting member 26, and the stopper plate 21, and the stopper plate 21 continues to maintain its position.

<Problems to be solved by the invention> In the above-mentioned conventional transfer paper conveying device, during the time when the stopper plate 21 is moving upward, the moving piece 2
This is the moment when the movable piece 2a is in contact with the driven piece 22, and when the moving piece 2a leaves the driven piece 22, the stopper plate 21 will immediately drop rapidly due to its own weight, so the stopper plate holes 16a and 17a are The transfer paper 18 that is being re-transported during the passage is subjected to impact, which has the disadvantage that blurring is likely to occur during transfer.

Furthermore, if the transfer paper 18 is small, for example, a business card, a postcard, etc., or a small transfer paper 18 of the same size, the transfer paper 18 will be re-conveyed diagonally by the weight and impact of the stopper plate 21. Therefore, it is necessary to install a special guide plate to prevent diagonal conveyance.
It also has the disadvantage of a complicated structure.

The present invention was made to eliminate the above-mentioned drawbacks, and is a transfer method that can prevent blurring during transfer by buffering the impact that the stopper plate gives to the transfer paper being re-transferred due to the delayed fall of the stopper plate. The purpose is to provide paper conveyance equipment.

Another object of the present invention is to provide a transfer paper conveyance device that can prevent small transfer paper from being conveyed diagonally without providing a special guide plate.

<Means for Solving the Problems> In the present invention, as shown in the longitudinal cross-sectional side views of main parts in FIGS. A passive piece 22 that receives movement of the moving piece 31 is provided on the main body frame 1,
A transfer paper transport path 15 between the transfer device 10 and transport rollers 13 and 14 that transport the transfer paper 18 to the device.
In a transfer paper conveyance device of a copying machine, which is provided with a stopper plate 21 that opens and closes, and is provided with an interlocking mechanism 23 that interlocks the movable piece 31 and the stopper plate 21, the movable piece 31 has an inclination of a predetermined length. A surface 31a is formed, and the slope of the sloped surface 31a is formed to gradually reduce the amount of operation of the passive piece 22 as the movable piece 31 moves in one direction (movement during feed). When the transfer paper 18 is a business card, postcard, etc., the stopper plate 21 is set so as to move downward after the paper has passed.

<Function> In the present invention, the movable piece 31 is formed with an inclined surface 31a of a predetermined length, and the inclined surface 31a is formed with a predetermined length.
The slope a is formed to reduce the amount of operation of the driven piece 22 as the moving piece 31 moves in one direction (movement during feeding), so even if the starting end 31b of the moving piece 31 passes through the driven piece 22, , the inclined surface 31a of the movable piece 31 is in contact with the passive piece 22, and the stopper plate 21 gradually falls according to the inclination of the inclined surface 31a until the inclined surface 31a disappears and the stopper plate 21 Even if the transfer paper 18 falls completely, the impact given to the transfer paper 18 during re-conveyance is extremely small, and the transfer paper 18 does not shake during transfer.

In addition, in the present invention, when the transfer paper 18 is a business card, postcard, etc., the predetermined length of the inclined surface 31a is
When the stopper plate 21 is set to move downward after these items pass, the small transfer paper 18 such as a business card passes the stopper plate 21 and then the stopper plate 21 completely falls, so the small transfer paper 18 18 is not conveyed diagonally.

<Example> Hereinafter, examples of the present invention will be described with reference to FIG. 1, a side view of the transfer paper conveying device of the present invention in a state before the movable piece is in contact with the passive piece, and FIG. 2, a side view of the state in which the movable piece and the passive piece are in contact. To explain the side view, the transfer paper conveying device of a copying machine includes a moving piece 31 provided on the document table 2, that is, a moving body during exposure, and a passive piece 22 that receives the movement of the moving piece 31 provided on the main body frame 1. A stopper plate 21 is provided to open and close the transfer paper conveyance path 15 between the transfer device 10 and the conveyance rollers 13 and 14 that convey the transfer paper 18 to the device, and the movable piece 31 and the stopper plate 21 are interlocked. An interlocking mechanism 23 is provided, and when the movable piece 31 moves in one direction and operates the passive piece 22, the interlocking mechanism 23 moves the stopper plate 21 upward and the movable piece 31 passes the passive piece 22. When this occurs, the stopper plate 21 is automatically dropped by its own weight,
Furthermore, the stopper plate 21 is configured not to operate when the movable piece 31 moves in the other direction. An inclined surface 31a of a predetermined length is formed on the moving piece 31, and the slope of the inclined surface 31a is determined by the unidirectional movement of the moving piece 31 (movement during feeding).
The predetermined length of the inclined surface 31a is such that when the transfer paper 18 is a business card, postcard, etc., the stopper plate 21 moves downward after the transfer paper 18 has passed. is set to .

Note that 32 is a first paper guide, 33 is a second paper guide, and the other configurations are the same as in FIG. 5 of the prior art.

In the above, the inclined surface 31a of the moving piece 31
is formed so that the amount of operation of the passive piece 22 decreases as the movable piece 31 moves in one direction (movement during feeding), so when the document table 2 is fed, the movable piece 2a Starting end 31b of
approaches the passive piece 22 from right to left, then rotates the passive piece 22 as shown in FIG.
Even after passing through, the inclined surface 31a of the moving piece 31 is in contact with the passive piece 22, and the stopper plate 21 gradually falls according to the inclination of the inclined surface 31a until the inclined surface 31a disappears. Even if the stopper plate 21 falls completely, the impact given to the transfer paper 18 during re-conveyance is extremely small, and the transfer paper 18 does not shake during transfer.

In addition, in the present invention, when the transfer paper 18 is a business card, postcard, etc., the predetermined length of the inclined surface 31a is
Since the stopper plate 21 is set to move downward after these have passed, the small transfer paper 18 such as a business card will pass the stopper plate 21 before the stopper plate 21 will completely fall. , the small transfer paper 18 is not conveyed obliquely.

When the document table 2 returns, the document table 2 and the movable piece 31 move from left to right and come into contact with the passive piece 22, but only the passive piece 22 rotates in the direction of the dotted arrow, and the force is is not transmitted to the rotating arm 24, the connecting member 26, and the stopper plate 21, and the stopper plate 21 continues to maintain its position.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

For example, in a copying machine that moves the light source,
A light source holder or the like may be used as the moving body during exposure.

<Effects of the invention> As is clear from the above explanation, according to the invention, an inclined surface of a predetermined length is formed on the moving piece, and the inclination of the inclined surface allows the moving piece to move in one direction (movement during feed). Since the actuation amount of the driven piece is gradually reduced as the moving piece moves, even if the starting end of the moving piece passes through the driven piece, the inclined surface of the moving piece is in contact with the driven piece, and the stopper plate will gradually fall according to the slope of the slope, and even if the slope disappears and the stopper plate falls completely, the impact on the transfer paper that is being re-transferred will be minimal, and the transfer paper will not fall during transfer. It can prevent blurring.

In addition, in the present invention, as in the embodiment, the inclined surface 3
When the predetermined length of the transfer paper 1a is set such that when the transfer paper is a business card, postcard, etc., the stopper plate 21 moves downward after the transfer paper passes, the small transfer paper such as a business card passes the stopper plate 21. After that, the stopper plate 21 completely falls, so the small transfer paper will not be conveyed diagonally.
Since the special guide plate used in the past can be eliminated, the structure can be made cheaper.

[Brief explanation of the drawing]

Figure 1 is a side view of the inventive transfer paper conveying device before the movable piece contacts the passive piece, Figure 2 is a side view of the movable piece and the passive piece in contact with each other, and Figure 3 is the prior art. FIG. 4 is a perspective view of the photoreceptor portion, and FIG. 5 is a side view of the transfer paper conveying device. A, B, C, D, E...axis, 1...main frame, 2...document stand, 10...transfer device, 13,1
4... Conveyance roller, 15... Transfer paper conveyance path, 1
8... Transfer paper, 21... Stopper plate, 22
... Passive piece, 23 ... Interlocking mechanism, 24 ... Rotating arm, 25 ... Stop pin, 26 ... Connection member, 31 ...
Moving piece, 31a... inclined surface.

Claims (1)

[Scope of utility model registration request] A moving piece is provided on the moving body during exposure, and a passive piece that receives the movement of the moving piece is provided on the main body frame,
A copying machine is provided with a stopper plate that opens and closes a transfer paper conveyance path between a transfer device and a conveyance roller that conveys the transfer paper to the device, and an interlocking mechanism that interlocks the moving piece and the stopper plate. In the transfer paper conveying device, the movable piece is formed with an inclined surface having a predetermined length, and the slope of the inclined surface is formed so that as the moving piece moves in one direction, the amount of operation of the passive piece gradually decreases. A transfer paper conveying device for a copying machine characterized by the following.