JPS6194943A - Transfer paper feeder - Google Patents

Abstract

PURPOSE:To shorten tray select time by withdrawing the calling-out roller upward, when moving a tray, which is selected to be at the paper feeding position, to the home position or the device withdrawing position. CONSTITUTION:When trying to withdraw a tray, which is selected and is at the position to feed, turn the cylinder shape cam 28 selectively to the arrow D direction with a clutch and the like. Due to the turn, the cam 33, which is fixed to the shaft 32, is turned to the arrow E direction through the levers 30 and 31, and the arms 12 are turned around the shaft 35 through the arm 34 to the arrow F direction. Due to the turn of the arms 12, the calling-out roller 11 is withdrawn to the upward direction from the transfer paper P. After the above, withdraw the tray 7 quickly from the paper feeding position, and then let the paper feeder 3 move up and down vertically to the selected tray position.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a paper feeding device for an image forming apparatus such as a copying machine, and in particular to an improvement of a large capacity transfer paper feeding device that has a multi-stage transfer paper storage section separate from the main body. This is related to.

(Prior art) Recently, a large number of transfer paper accommodating sections have been installed in parallel in the vertical direction separately from the main body of a copying machine, and a paper feeding device that can move up and down has been installed, making it possible to create a large-capacity transfer system that is integrated as a whole. Paper feeding devices have been proposed.

In this type of transfer paper supply device, the transfer paper storage section (tray) is located at the paper feeding position and at the non-paper feeding position i! ! (Home Bojishin)
However, conventional transfer paper supply devices of this type do not have a mechanism for pulling out the tray with the pickup roller and top paper engaged at the paper feeding position. Ta. Therefore, there is a drawback that it is time-consuming when replenishing a selected tray with transfer paper or removing jammed paper.

(Purpose) The present invention was made based on this background,
The purpose of this is to ensure that there is no problem when moving the selected tray at the paper feeding position to the home position or the device pull-out position.

(Structure) For this purpose, the present invention is characterized by having a mechanism for moving the tray upwardly with the calling roller of the paper feeder when the tray is moved.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a front view according to embodiments of the present invention, and is an example in which the copying machine main body 1 and the transfer paper supply bag Wt2 are separated and used in combination. In the embodiment, the transfer paper supply device 2 includes six trays 7, and can accommodate six types of transfer paper P.

The tray 7 is engaged with a tray holder 8 by a cam 9 so as to be movable in directions A and B in the figure, and the tray holder 8 is connected to the main body frame of the transfer paper supply device 2 via a rail member 10.
In FIG. 1, it is engaged so that it can be freely pulled out toward the front.

The cam 9 is selectively driven by a clutch, which is not shown in the drawings. This clutch can be used for either half-turn or one-turn. In the case of a half-turn clutch, the tray 7 always operates in contact with the cam 9, and in the case of a one-turn clutch, the tray 7 is operated by the cam 9. When it has moved the maximum amount in the A direction, it is sufficient to stop it from moving in the B direction using a stopper.

The paper feeding device 3 is engaged with the main body frame via a guide member so as to be vertically movable, and is vertically moved via a wire 4 by a motor 5.

The operation and details of each part will be explained below. Assuming that the user has now selected any one of the six trays, the 0 selection command first causes the paper feeder 3 to be placed above the selected tray 7 and to load the maximum number of sheets of transfer paper. The position where the calling roller 11 does not contact the paper (δ>O in Fig. 2)
) and stop.

Next, the selected tray 7 is moved by the cam 9 to the paper feeding position 1ll (
When the paper is pushed out in the input direction (in Fig. 1) and stops, the paper feeder 3
descends. Then, the calling roller 11 and the transfer paper P
comes into contact with the arm 1 of the calling roller 11 shown in FIG.
The paper feeder 3 is adjusted so that the inclination angle θ of
The position of is controlled. This is achieved by the same control method as the control method in which the paper feeder 3 is lowered as the number of transfer sheets P decreases during copying. When θ falls within a predetermined range, the paper feed bag 23 stops and becomes ready for copying.

When the user presses down the copy S opening, each roller of the paper feeding device 3 is driven by a drive device not shown in the drawings, and the transfer paper P is fed one by one. The fed transfer paper P is separated and changed direction within the paper feeder 3, and is transferred to the copying machine main body 1 by two conveyor belts 6 arranged in front and back of the paper feeder 3 as shown in FIG. It is conveyed vertically and a copying operation is performed within the copying machine.

Further, in the event of an abnormality such as a paper jam, the paper feeder 3 and the conveyance path are opened centering on the 0 point as shown by the line 11 in the figure, and the transfer paper remaining in the machine can be removed. Since the paper feed device 3 is both opened, the tray 7 can be pulled out and all the transfer paper remaining in the device can be removed. Also, paper feed device 3
Maintenance (replacement, cleaning) of each roller that makes up the system is easy.

FIGS. 4 and 5 show a lifting mechanism for the pickup roller 1, FIG. 4 is an enlarged front view of the sheet feeding device section, and FIG. 5 is an external perspective view of the pickup roller lifting mechanism.

Reference numeral 28 denotes a rod-shaped cam located outside the paper passing section over the entire length of the vertical movement range of the paper feeder 3.

When the tray 7 that has been selected and is in the paper feeding position is to be retracted from the paper feeding position, the rod-shaped cam 28 is selectively rotated (in the direction of the arrow) by a clutch or the like. When the rod-shaped cam 28 is rotated, the lever 30.31 is moved. The shaft 32 and the cam 33 fixed thereto rotate in the direction of arrow E, and the arm 12 rotates in the direction of arrow F about the shaft 35 through the arm 34. move further upwards. After the transfer paper and the calling roller 11 are separated, the tray 7 is retracted from the paper feeding position, and the paper feeding device i! 3 moves to the selected tray position.

FIGS. 6 and 7 are a longitudinal sectional view and a plan view of the tray portion.

When the tray 7 that has been selected and is in the paper feeding position is pulled out from the supply device, the stroke of pulling the call lever 22 rotates the rod-shaped cam 28, causing the call roller 11 to rotate upward and separate from the transfer paper. When the lever 22 is further pulled, the stopper that prevents the tray 7 from returning in the direction of arrow B is removed, and the tray 7 moves in the direction of B in conjunction with the stroke of the lever by the pin 40 and the grooved cam 42. Tray 7
When the movement of the tray is completed (when the pin 40 reaches point a), the tray is pulled out toward the front of the machine (in the direction of arrow G) by a claw member (not shown) provided on the support member 37. When the tray 7 is returned to the feeding device, the pull-out lever 22 is pushed in (then the pin 40 moves to the grooved cam 420 point, the claw member 38 provided on the support member 37 hits the tray holder 8, and the lever 22 When pushed in, the tray is stored in the supply device.

Alternatively, the grooved cam 42 may be shaped like 42'' shown in FIG. 8 so that the tray 7 can be moved to the paper feeding position by the stroke of the pull-out lever 22.

At this time, the paper feed direction (
A stopper member is required to stop the tray 7 from moving in the direction of arrow A).

(Effects) The present invention is as described above, and according to the transfer paper supply device of the present invention, there is no need to raise the entire paper feed device when the selected tray is retracted from the paper feed position. , the tray selection time is shortened. It is also selected,
The tray in the paper feed position can be pulled out without waiting time by simply operating the pull-out lever. Furthermore, the selected tray can be pulled out even in the event of an abnormality such as a paper jam or when the power is turned off.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the internal structure of a transfer paper supply device according to an embodiment of the present invention, and FIG. Yo, □. ,. one. , □□, 1. Figure 3 is a diagram showing the positional relationship after tray selection, Figure 4 is an enlarged front view of the paper feeder section, Figure 5 is a perspective view showing the calling roller lifting mechanism, Fig. 6 is a longitudinal sectional view of the tray section, Fig. 7 is the same,
The plan view, FIG. 8, is a diagram showing the shape of the cam. 3...Paper feeding device, 7...Transfer paper storage section, 11...
... Calling roller, 28 ... Rod-shaped cam. Figure 1 8 A Figure 6 Figure 7

Claims (3)

[Claims] (1) A plurality of transfer paper storage sections are provided almost horizontally, a means for vertically moving a single paper feeding device to the position of a selected transfer paper storage section, and a means for feeding the selected transfer paper storage section. The transfer paper storage unit in the paper feeding position is selected in a transfer paper supply device that has a means that allows the transfer paper storage unit to be moved to a paper feeding position in the paper feeding direction, and to pull out the transfer paper storage unit in a direction other than the feeding direction when replenishing the transfer paper. A transfer paper feeding device characterized in that when the paper feeder leaves a paper feeding position, a calling roller of the paper feeding device is retracted upward so that the transfer paper and the calling roller are out of contact with each other. (2) The transfer paper feeding device according to claim (1), wherein when the transfer paper storage section leaves the paper feeding position, it means retracting to a home position. (3) The transfer paper supply device according to claim (1), wherein when the transfer paper storage section leaves the paper feeding position, it means to pull it out from the transfer paper supply device.