JPS5842905B2 - Card feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a card dispensing device in an information document reading device such as a mark card or an OCR card.
In particular, it is an object of the present invention to provide a card dispensing device that can always maintain a constant pressing force of a picker roller against a card and can save power.

In a device in which the top card of a stack of cards is sequentially fed out one by one by a picker roller, it is necessary to press the top card against the picker roller with a predetermined pressure.

In conventional devices of this type, whether or not the topmost card of a stack of cards is pressed against the picker roller with a predetermined pressure is determined by checking the pressing force between the picker roller and the card within the picker roller or on the shaft of the picker roller. A detection means for detecting the pressure is provided, and the paper feed plate is moved so that the pressure is within a predetermined range.

However, in the above conventional example, it is necessary to detect the force applied to the rotating picker roller.
Due to eccentricity of the picker roller, etc., the pressing force deviates from a predetermined range, resulting in double feeding.

The present invention eliminates the above-mentioned conventional drawbacks, and provides a card dispensing device with a simple structure that can always keep the pressure force between the picker roller and the card within a predetermined range without providing pressure detection means. This is what we provide.

Examples thereof will be described below with reference to FIGS. 1 to 4.

1 is a picker roller, which has a metal core lined with synthetic rubber to increase the coefficient of friction against paper, and as it rotates in the direction of arrow a, it picks up the cards 3 on the hopper paper feed plate (hereinafter referred to as paper feed plate) 2 to the substrate 8. It functions to push out the inclined separation plate (hereinafter referred to as inclined plate) 4 toward the inclined part 4b fixed to the 4b.

In this case, if the pressing force between the card 3 and the picker roller 1 and the degree of inclination of the 4b portion of the inclined plate 4 are selected appropriately, the uppermost card (hereinafter referred to as the uppermost card) among the many cards stacked on the paper feed plate 2 can be selected. 3' in the direction of the inclined plate 4, the second and subsequent cards are blocked from advancing at the inclined part 4b, and are pushed out to the inclined plate 4.
Only one card 3, the top card 3', can be sent out beyond this point.

Reference numeral 5 denotes a picker roller shaft, which is fixed to the picker roller 1 and can freely rotate with a bearing 7 relative to the front arm 6a and rear arm 6b of the arm body 6, and is restrained in the axial direction by a stopper not shown in the figure. being supported and supported.

The enclosed arm body 6 is a front arm 6a. The board 8 faces toward the arm boss 6c that is integrally assembled with the rear arm 6b.
It can freely rotate around a shaft 90 fixed to the shaft 90, and is supported so as to be restrained in the axial direction.

By moving the weight 6d, the gravity balance of the axis 9 of the arm body 6 including the picker roller 1 is adjusted, and the pressing force against the picker roller 1 and the top card 3' at the standard card feeding height of the picker roller 1 is adjusted. It is a part for adjusting.

Next, a drive system for rotating the picker roller 1 as much as necessary and sufficient to send out the uppermost card 3' will be explained.

Reference numeral 10 denotes a toothed belt to which power is always transmitted from the main drive source, and is coupled to this in the rotational direction via a sprocket 11, and an electromagnetic clutch outer disk supported so as to freely rotate around one part of the shaft 15. 12 is constantly rotating.

While the electromagnetic clutch yoke 14 is energized by a feed command from the control circuit of the entire reading device, the electromagnetic clutch outer disk 12 is magnetically pressed against the electromagnetic clutch inner disk 13 fixed to the shaft 15, and the sprocket 11 and the shaft 15 are pressed together. The picker roller 1 rotates integrally with the picker roller shaft 5 via a flexible joint 16 using a coil spring.

Note that 18 is a rotation stopper for the electromagnetic clutch yoke 14, which is connected to the board 8.
It is fixed to an auxiliary board 17 which is fixed to.

Further, the shaft 15 can freely rotate with respect to the substrate 8 and the auxiliary substrate 17 by means of a bearing 19, and is restrained and supported in the axial direction.

When the top card 3 is fed out by the picker roller 1 and reaches the paper feeder of the subsequent reading section, the picker roller 1
To stop the zero rotation, stop the excitation of the electromagnetic clutch yoke 14, and excite the electromagnetic brake yoke 22. The brake disc 20, which is connected to the fixed disc 21 and the shaft 15 in the rotational direction, is crimped to the shaft 15. The brake is applied and the picker roller stops rotating 10 times.

Next, the height adjustment mechanism of the paper feed plate 2 will be explained.

As shown in Figure 4, the light emitting surface H1 and the light receiving surface R of the solid state light emitting and receiving element
When the photoelectric switch 50, which is made up of a composite component (hereinafter referred to as a photointerrupter) 23 and a part of the rear arm 6b, which are integrally formed by facing each other at a certain interval 3, is turned on from the OFF state, the switch signal changes to the Schmitt signal. amplifier 24,
If a circuit is configured so that the power is turned on to a motor (hereinafter referred to as a hopper motor) 26, which has an active braking device built into its rotor, such as a reversible motor, via a solid state relay 25, and a button is pressed, the paper feed plate 2 is turned on by a feed command. As the number of cards 3 on the top of the rear arm 6b gradually decreases, the lower end of the rear arm 6b that engages with the photo-interrupter 23 gradually reduces the degree to which it blocks the optical axis of the photo-interrupter 23, and finally becomes sufficient to turn on the Schmitt amplifier 24. leading to the generation of output.

Along with this, the above-mentioned hopper motor 26 rotates.

On the other hand, the paper feed plate 2 is assembled integrally with the paper feed plate base 27, and the paper feed plate base 27 is connected to the board 8 via the guide mounting plate 29.
Fixed.

The paper feed plate 2 has a roller group 29 that rotates while engaging with a guide rail 28, and is configured to be movable within a predetermined range only in the vertical direction.

The paper feed plate base 2T has one end fixed to the board 8, and a coil spring 32 hung on the N ratio blocking hook 43. The spring hook receives a force in the direction of pulling up the pin 30. have.

In addition, the spring hook is annularly connected to the plate 31 with a chain 734 having one end connected to the Nicoil spring 33. Furthermore, the chain 734 is stretched between the top sprocket 35 and the bottom sprocket 36, and controls the up and down reciprocating linear movement of the paper feed plate 2. It has a structure that converts it into a reciprocating rotational motion of the bottom sprocket 36.

The sprocket 35 can freely rotate around the shaft 9 and is restrained in the axial direction.

Also, a one-way clutch 37 is installed between the boss of the bottom sprocket 36 and the shaft 38, and when the bottom sprocket 36 is driven in the direction of arrow C, the rotational force is transmitted from the bottom sprocket 36 to the shaft 38. is interlocked with the hopper motor 26 via a timing pulley 39, a timing belt 40, a timing pulley 41 and a transmission 42.

Here, the input/output shaft relationship of the transmission 420 is connected to the hopper motor 26.
When the sprocket 41 side is viewed as the input side and the sprocket 41 side is viewed as the output side, the relationship is deceleration, and the tension of the spring 32 causes the hopper motor to If the speed ratio of the transmission is selected such that the sprocket 26 is not driven, and the direction of rotation of the hopper motor 260 is set in the direction in which the sprocket 36 rotates in the direction of arrow C, the paper feed plate 2 will rotate by itself while the hopper motor 26 is stopped. It is possible to obtain a mechanism that can stop at any position during the possible stroke of the hopper motor 26 and allows the paper feed plate 2 to rise by the force of the spring 32 only while the hopper motor 26 is rotating.

As is clear from the above explanation, when the number of cards 3 on the paper feed plate 2 decreases due to the feed command from the control circuit of the entire reading device and the picker roller 1 is lowered by a small fixed amount, the output of the photoelectric switch 50 changes to the Schmitt amplifier 24. O
The solid state relay 25 is set to the N state, and the hopper motor 26 rotates.

As the hopper motor 26 rotates, the paper feed tray 2, which is being pulled up by the spring 32, rises, causing the card 3 on it to rise, causing the picker roller 1 to rise by a small fixed amount, and the arm body 6 to move toward the shaft. Rotate around 9,
The degree to which the right end of the rear arm 6b blocks the optical path of the photointerrupter 23 increases again, and the Schmidt amplifier 24 is turned off, and the hopper motor 26 is de-energized, the hopper motor 26 stops, and the sheet feed plate also stops rising.

That is, regardless of the amount of remaining card 3, within the range of hysteresis of the photoelectric switch corresponding to the ON/OFF hysteresis of the Schmidt amplifier, the height of picker roller 1 is almost always changed by the reaction force of bending of flexible joint 16. The pressing force against the card 3' can also be kept almost constant.

Next, when setting a new card on the paper feed plate, when the paper feed plate 2 is pushed down manually, the sprocket 36 rotates in the opposite direction of the arrow C through the chain 34, due to the presence of the one-way clutch 37. The sprocket 36 spins idly relative to the sprocket 38.

That is, regardless of whether the hopper motor 26 is rotating or not, the paper feed plate 2 is easily pushed down if a downward force is applied that overcomes the tension of the spring 32, and the picker fixed to the base plate 8 is positioned at a position where it engages with the rear arm 6b. It is possible to create a gap in which a new card can be set between the picker roller 1 and the paper feed plate 2 whose lowering amount is limited by the roller lowering stopper (hereinafter referred to as a stopper) 42.

The present invention has the above-mentioned configuration, detects the rotation of an arm body provided with a picker roller at one end, and when the rotation of the arm body exceeds a predetermined value, moves the hopper paper feed plate and removes the picker roller. The pressure force of the card can be controlled within a predetermined range.

Further, according to the present invention, there is no need for pressure detection means, so there is an advantage that the configuration is simple.

However, the present invention does not simply raise the hopper paper feed plate by the driving force of the motor, but uses elastic biasing means such as a spring to raise the hopper paper feed plate, and only when raising the hopper paper feed plate does the motor This has the advantage that a small power motor is required to energize and release the drag force against the elastic biasing means, and that power can be saved.

[Brief explanation of drawings]

1, 2, and 3 are a front view, a right side view, and a top view of a card dispensing device of an OCR and OMR card reader, respectively, which are an embodiment of the present invention, and FIG. 4 is a card dispensing section thereof. Hopper paper feed plate height control circuit block diagram. DESCRIPTION OF SYMBOLS 1... Picker roller, 2... Hopper feed plate, 3... Card, 6... Arm body, 26... Motor, 50 ······Photoelectric switch.

Claims (1)

[Claims] 1 A rotatable arm body, a picker roller rotatably supported at one end of the arm body, a rotation drive means for rotating the picker roller, a movable hopper paper feed plate, and a hopper paper feed plate that connects the hopper paper feed plate to the picker. An elastic biasing device that biases the roller in the direction, a detection device that detects a predetermined rotation angle of the arm body, a pair of sprockets, and a chino or the like stretched between the sprockets and engaged with the hopper feed plate. a flexible member; a motor that is controlled on and off in accordance with the output of the detection means; a transmission that reduces the rotational speed of the motor; and rotation transmission means that transmits the rotation of the transmission to the sprocket. A card dispensing device, characterized in that, when the motor is energized, the resistance force exerted by the transmission and the motor on the elastic biasing means is released.