JP2523578B2 - Transfer device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrying device used in a printer, a copying machine or the like using an electrophotographic method.

2. Description of the Related Art A conventional transfer device will be described below with reference to the accompanying drawings.

FIG. 6 is a side view of a main part of a conventional conveying device used in a laser printer. 1 is a recording sheet, 2 is a laser printer chassis, and 10 is a powder image transferred onto the recording sheet 1 is fixed. The fixing device 10 includes a heating roller 10a having a heat source (not shown in the figure) inside thereof.
And a pressure roller 10b that holds the recording paper 1 together with the heating roller 10a, and a discharge roller 1 that discharges the recording paper 1 after fixing.
It has 0c and 10d. Reference numerals 30 and 31 are guides for the recording paper 1.

The recording paper 1 having the powder image fixed on the upward surface is guided to the fixing device 10 and fixed by the fixing device 10. The recording sheet 1 after the fixing is discharged by the discharge rollers 10c and 10d, is conveyed along the guides 30 and 31, and is discharged with the surface on which the recording is performed facing downward.

Similar to the conventional example shown in FIG. 6, FIG. 7 shows another conventional conveying device used in a laser printer, 2 is a chassis, and 10 is a fixing device, which are the same as those in the first conventional example. It has a similar configuration. Reference numeral 32 denotes a paper discharge tray that stores the recording paper 1 discharged by the discharge rollers 10c and 10d in a state where the surface on which the recording is performed is up.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described conventional configuration, since the recording surface can be used only in either the state in which the recording surface faces upward or the state in which the recording surface faces downward, there is a demand for use in the opposite state. Even then, I couldn't handle this. In order to solve this problem, there is a copying machine or the like in which a sorter for discharging the recording paper with the recording surface facing upward and the recording surface facing downward in the process of transportation is added to a copying machine. However, there is a problem that the entire device becomes large and the price increases.

Means for Solving the Problems The present invention provides a recording medium and a first position that forms a part of a first path for discharging the recording medium with the recording surface of the recording medium facing downward by rotating. A guide plate configured to take a second position separated from a first path forming a second path for discharging with the recording surface facing upward, and rotatably provided on the guide plate When the guide plate takes the first position, it projects from the guide surface of the guide plate to guide the recording medium to the first path, and when the guide plate takes the second position, it moves together with the guide plate to the first position. And a guide member which is separated from the path and retracts from the guide surface of the guide plate.

Operation With the above configuration, the orientation of the recording surface can be freely selected by changing the positions of the guide plate and the guide member provided on the guide plate.

Embodiment FIG. 1 is a side view of a laser printer using a conveying device according to an embodiment of the present invention, in which 1 is a recording paper, 2 is a chassis, and 10 is a fixing device, which have the same construction as the conventional example. It is a thing. 3 is a supply cassette in which the recording paper 1 before use is stored, and 4 is a photosensitive layer on the surface (not shown in the drawing).
5, a photosensitive drum 5 on which a developer (not shown in the figure) including a toner and a carrier is incorporated, and 6 is a laser light source (not shown in the figure).
And an optical unit having a scanning mirror 6a and a lens 6b,
7 is a charger, 8 is a transfer device, 9 is a cleaning blade,
11 is a static eliminator.

Next, the conveying system for the recording paper 1 after the recording, which is provided after the fixing device 10, will be described with reference to FIG. In the figure, 13 has a guide surface 13a and serves as a guide plate for the recording paper 1, 14 denotes a shaft for rotatably supporting the guide plate 13,
Reference numeral 15 is a guide member for guiding the recording paper 1, 16 is an arm formed integrally with the guide member 15, 17 is a spring for urging the guide member 15 and the arm 16 in the direction indicated by the arrow A, and 18 is a guide member 15 and A shaft 19 that rotatably supports the arm 16, and 19 and 20 are recording papers 1.
A guide plate 21 for guiding the recording sheet 1 is supported by the jersey 2, a conveying roller for conveying the recording sheet 1, and a supporting plate 22 is supported by the guide plate 13 for conveying the recording sheet 1 in cooperation with the conveying roller 21. A conveying roller, 23 is an operation lever provided on a part of the guide plate 13, 24 is a shaft for rotatably supporting the operation lever 23, 26 is a pin provided on the chassis 2, and the arm 16
Is in contact with this pin 26.

FIG. 3 is a side view of the main part of the transfer device of this embodiment.
Is a hook formed integrally with the operation lever 23 and supported rotatably around a shaft 24, and 27 is a hook fixed to the chassis 2 and engaged with the hook 25. In addition, hook 25
And 27 are omitted in FIG.

The operation of the laser printer of the present embodiment configured as described above will be described below.

With the photosensitive drum 4 rotated, the charger 7 operates,
Corona discharge is performed on the photosensitive drum 4. A laser beam is irradiated from the optical unit 6 to the charged photosensitive drum 4 in a direction indicated by an arrow B in accordance with recording data, and a latent image is formed on the photosensitive drum 4. When the latent image passes through the developing device 5, the toner mixed and stirred with the carrier in the developing device 5 is attracted to the latent image, and a toner image is formed. Next, the transfer device 8 transfers the toner forming the toner image formed on the drum onto the upper surface of the recording paper 1 (hereinafter referred to as the recording surface). Next, the recording paper 1 to which the toner has been transferred is transported and enters the fixing device 10, and the toner image is fixed on the recording paper 1 between the heating roller 10a and the pressure roller 10b.

The recording paper 1 on which recording has been completed is ejected by the ejection rollers 10c and 10b, guided by the guide member 15, and guided by the guide plate 13.
And 19 and 20, and is conveyed by the conveying rollers 21 and 22 and discharged onto the upper part of the chassis 2 with the recording surface facing downward.

When the recording papers 1 after recording are discharged through such a route, when printing a document having an order, the recording papers 1 are stacked downward from the one having the smallest page number, and the order is set after the printing is completed. It has the advantage that it does not need to be replaced.

Next, a description will be given of a case where the recording sheets 1 are stacked downward on the chassis 2 as described above, and the case where the recording sheets 1 are stacked upward is changed.

When the operating lever 23 is pulled in the direction indicated by the arrow C from the state shown in FIG. 3, the hook 25 rotates together with the operating lever 23 as shown in FIG. 4, and the hook 25 disengages from the hook 27. When the guide plate 13 is further rotated in the direction indicated by the arrow C, the guide plate 13 is opened with respect to the chassis 2 as shown in FIG. At this time, the arm 16 is rotated in the direction indicated by the arrow D by the spring force of the spring 17, and accordingly, the guide member 15 is stored below the guide surface 13a. Therefore, there is no protrusion on the guide surface 13a.

In this state, the recording sheets 1 after fixing are discharged by the discharge rollers 10c and 10d and stacked on the guide surface 13a with the recording surface facing upward. At this time, as described above, since there are no protrusions on the guide surface, the recording papers 1 can be easily transported and stacked.

When returning from the state in which the recording sheet 1 is discharged with the recording surface facing upward as shown in FIG. 5 to the state in which the recording surface is discharged downward with the recording surface facing downward again as shown in FIG. The guide plate 13 is closed, and the hook 25 is hooked on the hook 27. At this time, the arm 16 is rotated by coming into contact with the pin 26, and the guide member 15 is also rotated together therewith, and the discharge roller 10c is rotated.
And 10d, the recording paper 1 conveyed is guided to the path along the guide surface 13a.

EFFECTS OF THE INVENTION The present invention provides a recording medium with a first position forming a part of a first path for ejecting the recording medium with the recording surface facing down by rotating. And a guide plate configured to take a second position separated from the first path forming a second path for discharging in a state of being discharged, and a guide plate rotatably provided on the guide plate. When it takes the first position, it projects from the guide surface of the guide plate to guide the recording medium to the first path, and when the guide plate takes the second position, it separates from the first path together with the guide plate. With the guide member retracting from the guide surface of the guide plate, the position of the guide plate and the guide member provided on the guide plate is changed, so that the guide member has a simple structure and is a guide plate. Provided and moved with the guide plate By doing so, it is possible to freely select the direction of the recording surface on which recording is reliably performed for a long period of time and eject the recording surface.

[Brief description of drawings]

FIG. 1 is a side view of a laser printer using a carrying device according to an embodiment of the present invention, FIGS. 2 and 3 are side views of the same main part, and FIG. 4 is a side view of the main part showing a state during the transition. 5 and 5 are side views of the main part of the same, FIG. 6 is a side view of the main part of a laser printer using a conventional transfer device, and FIG. 7 is a side view of the main part of a laser printer using another conventional transfer device. It is a figure. 1 ... Recording paper, 2 ... Chassis, 3 ... Supply cassette, 4 ... Photosensitive drum, 5 ... Developer, 6 ... Optical unit, 7 ... Charger, 8 ... Transfer, 9 ... Cleaning blade, 10-fixing device, 11-static eliminating device, 13-guide plate, 14-axis, 15-guide member, 16-arm, 17-spring, 18-axis, 19, 20 ...... Guide plate, 21, 22 …… Conveying roller, 23 …… Operating lever, 24 …… Axis, 25 …… Hook, 26 …… Pin, 27 …… Hook.

Claims (1)

(57) [Claims] 1. A first path for ejecting a recording medium with the recording surface of the recording medium facing downward, a first position for forming a part of the first path by rotating, and a recording medium. A guide plate configured to take a second position separated from the first path forming a second path for discharging with the recording surface facing upward, and rotatable to the guide plate. When the provided guide plate takes the first position, the guide plate projects from the guide surface of the guide plate to guide the recording medium to the first path, and the guide plate takes the second position. And a guide member that is separated from the first path together with the guide plate and retracts from the guide surface of the guide plate.