JPH0326615A - Paper feed device equipped with ramp - Google Patents

Abstract

PURPOSE:To facilitate miniaturization and less power capacity of a paper feed device for a copying machine, etc., by driving a ramp and a feed means with one motor. CONSTITUTION:When papers 1 are set on a ramp 2 and a ramp cover is switched on, a stepping motor 19 is rotated toward an arrow mark on a continuous line. Next, a lift clutch 20 and a lift solenoid 21 are switched on to connect a lift idle gear 25 to a gear for the clutch 20 and raise the ramp 2. On the other hand, the rotation of the stepping gear 19 is transmitted to a feed clutch 15, idle gears 22, 23 and a gear 24 for a feed roller. A top paper out of the papers 1 on the ramp 2 is detected by a paper sensor 8 and then the lift clutch 20 and the lift lock solenoid 21 are off to stop the ramp 2 and the motor 19. The motor 19 is then rotated by the input of a feed signal for feeding operation.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a paper feeding device, and more particularly, to a paper feeding device used in, for example, copying machines, printers, printing machines, facsimile machines, banknote handling machines, etc. be.

[Prior Art] A conventional paper feeding device includes a lifting motor for raising and lowering a lifting table on which a plurality of sheets of paper can be placed, and a feeding motor for feeding the paper placed on the lifting table. It has been warned against this.

[Problems to be Solved by the Invention] In a paper feeding device such as the conventional example described above, a lifting drive motor for raising and lowering the lifting table and a paper feed drive for feeding the paper placed on the lifting table are required. It has a separate drive motor. Therefore, a drive control circuit is required to drive each drive motor, and the drive motor for raising and lowering the elevator platform on which multiple sheets of paper are placed is an expensive DC motor equipped with a gear head, etc. Since the paper feed motor uses a DC motor or the like, an encoder or the like is used to control the paper feed.

In this way, since the lifting motor for raising and lowering the lifting platform and the feeding motor for feeding the paper are separate, costs increase due to increased capacity of the motor, electrical components, power supply, etc., and the overall size of the device. There was a point.

[Means for solving the problem (and action)] The present invention has the following features:
The purpose of this system is to solve the above problem, and by driving the lifting motor that raises and lowers the lifting platform and the feeding motor that feeds the paper placed on the lifting platform by the same motor, By making the drive control circuit that drives the motor more compact and driving it from one motor C, the number of motors and electrical components can be reduced.
Furthermore, the capacity of the power source can be reduced, and the entire device can be configured compactly.

[Example] An embodiment of the invention is shown in FIG.

The elevating table 2 is connected to chains 13 at both ends, and a plurality of sheets of paper can be stacked on the elevating table 2. The stacked paper 7 is taken out from the upper part of the paper 1 stacked on the lifting table 2 by the pickup roller 3, and the paper is transferred one by one to the transport roller 4 and the separation roller 5C.
The paper is transported and separated into one sheet by the feed roller 6.
, are arranged so as to be fed to the feeding section by paper feeding rollers 7. A stepping motor 19 is disposed on the back side, and a drive system is disposed that feeds the paper to the feeding section and raises and lowers the elevating table 2 by driving the stepping motor 19.

After setting the paper l on the elevator platform 2, the elevator platform cover SW is turned on.
(not shown in the figure), the stepping motor 19 rotates in the direction of the solid arrow. After the motor rotates, the lift clutch 20 and lift lock solenoid 21 are turned O.
When the N state is entered, the elevating idle gear 25 and the gear of the elevating clutch section are connected, and the transmission is transmitted to the gear disposed in the chain section, so that the elevating table 2 loaded with paper rises. In this state, the stepping motor 19 operates the paper feed clutch 15, the idle gears 22 and 23, and the feed roller gear 2.
4. Then, when the position of the top sheet of the sheets stacked on the lifting platform 2 is detected by the paper height sensor 8, the lifting clutch is turned on, the lifting lock solenoid is turned ON, and the motor 19 rotates several steps, and then the lifting clutch 20 is turned on. The lift lock solenoid 21 is turned off, the lift lock gear 26 is locked by the lift lock solenoid 21, and the lift platform 2 is stopped in this state. After the lifting clutch 20 and lifting lock solenoid are turned off, the stepping motor 19 stops driving. In this state, when a paper feed signal is input, the stepping motor 19 rotates again in the direction of the solid arrow. After that, the paper feed clutch 15
LN, the conveyance roller 4, separation roller 5, and pick-up roller 3 move the sheets 1 stacked on the lifting platform 2, and the conveyance roller 4 and separation roller 5 separate the sheets one by one. Then, when the timing sensor turns on, the big up roller 3 separates from the paper 1, and is further conveyed to the feed roller 6 and the feed roller 7, and the feed sensor 1
When paper l is detected by 8, the paper feed clutch is turned OFF.
, the conveying roller 4, separation roller 5, and big up roller 3 stop driving, and the feeding roller 6 feeds the material to the feeding section. In this state, when a plurality of sheets of paper are fed, the top surface position of the paper is lowered. Then, when the paper height sensor 8 is turned from ON to OFF, the lift clutch 20 and the lift lock solenoid 21 are turned ON again, and the lift idle gear 25 and the gear of the lift clutch are connected, and the lift platform 2 is lifted and lowered again. Clutch 20. The stepping motor 19 rotates several steps from the lift lock solenoid 210N to raise it, and the paper height sensor 8 detects it. After that, the lift clutch 20 and the lift lock solenoid 2
1 is turned off, the lift lock gear 26 is locked by the lift lock solenoid 21, and the lift table 2 is stopped in that state. After the lift clutch 20 and the lift lock solenoid are turned off, the stepping motor 19 stops driving.

On the other hand, when the lifting platform cover SW (not indicated in the figure) is turned off, the stepping motor 19 rotates clockwise in the direction of the dotted line, and then the lifting clutch 20. The lift lock solenoid 21 is turned ON, and the drive from the stepping motor 19 is transmitted to the chain 13, and the lift platform 2 is lowered.

Then, the elevator platform lower limit sensor 11 detects that the motor l9
When the drive is OFF/, the lifting platform 2 stops. And the lifting clutch 20. The lift lock solenoid 21 is turned off. In this state, the stepping motor 19
The signal is transmitted to the paper feed clutch 15, idle gears 22, 23, and feed roller 24, but since the paper feed clutch 15 is in the OFF state, the conveyance roller 4, separation roller 5, and pick-up roller 3 do not operate. Furthermore, the feeding roller does not rotate in reverse because a one-way clutch is inserted into the feeding roller gear.

[Other Embodiments] In the above embodiments, a pair of paper feeding rollers and separation rollers are used as paper feeding means to separate and transport one sheet, but as another paper feeding means, a feeding roller, a separation bat, a feeding roller,
Any paper feeding means that can separate and convey sheets into one sheet, such as a separation claw type, may be used.

[Effects of the Invention] As explained above, the elevating motor for raising and lowering the elevating table 2 and the feeding motor for feeding the paper loaded on the elevating table are driven by the same motor (for example, a stepping motor). By doing so, the drive control circuit for driving the motor becomes compact.

In addition, by using a single motor to raise and lower the platform and feed the paper on the platform, it is possible to reduce the number of motors equipped with gear heads and other electrical components, and thereby also reduce the capacity of the power supply. This makes it possible to make the entire device compact.

In addition, by using a stepping motor as the drive motor as in the embodiment, it is possible to eliminate the need for an encoder, etc. for feeding control when feeding paper.
Costs can be held down, and a cheaper paper feeding device can be provided.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the embodiment, Fig. 2 is a sectional view of the embodiment, Fig. 3 is a block diagram of the embodiment, Fig. 4 is a sectional view of the conventional example, Fig. 5 is a perspective view of the conventional example, FIG. 6 is a block diagram of a conventional example. l...Paper 15...Paper feed clutch 2...Elevating platform 16...Encoder 3...Pickup 0-ler 17...
Timing sensor 4...conveyance roller 1
8...Feeding sensor 5...Separation o-ler
19...Motor (elevating and feeding 6...Feeding roller feed motor) (stewing motor) 7...Feeding roller 20...Elevating clutch 8...Paper height sensor 21...
・Lift lock solenoid 9...Paper presence sensor
22... Idle gear 10... Lifting platform upper limit sensor 23... Idle gear 11... Lifting platform lower limit sensor 24... Feed roller gear 12... Lifting platform lifting motor 25... Lifting idle Gya 13...
Lifting platform chain 26...Lifting gear l4...Paper feeding motor

Claims (1)

[Claims] 1. A paper feeder comprising: an elevating table that is arranged to be movable up and down and on which a plurality of sheets of paper are placed; and a feeding means that feeds the sheets of paper placed on the elevating table. A paper feeding device, characterized in that an elevating means for elevating and lowering an elevating table and a paper feeding means for feeding sheets stacked on the elevating table are driven by one motor.