JPS61277520A - Paper feeding device - Google Patents

Abstract

PURPOSE:To aim at miniaturization in a paper feeding device, by installing a mechanism which performs paper feeding motion of a paper feed roller and lifting motion of a hopper table with the same driving part. CONSTITUTION:When a driving motor is rotated clockwise, a paper feed roller shaft is driven for rotation in an (a) direction whereby paper feeding motion by a paper feed roller 10 takes place. At this time, a rotary shaft 13 to be connected to a hopper table pulley 12 is not rotated in the (a) direction, therefore power is not transmitted to this shaft 13 so that a hopper table 17 is pushed upward by energizing force of a spring 18, and the paper feed roller 10 makes a bookmark 11 press it. In addition, when the driving motor is rotated counterclockwise, the rotary shaft 13 is driven for rotation in a (b) direction, and the hopper table 17 is pressed downward by a lifting roller 16. At this time, the paper feed roller shaft is not rotated in the (b) direction whereby power is not transmitted to the roller 10, so paper feeding motion is in stoppage.

Description

[Detailed Description of the Invention] [Summary] In a paper feeding device equipped with a hopper table on which a form is loaded and a paper feed roller that feeds out the loaded form, the paper feeding operation of the paper feeding roller and the raising and lowering operation of the hopper table are controlled. By providing a mechanism that uses the same drive unit, it is possible to downsize the paper feeding device.

[Industrial application field]

The present invention relates to a paper feeding device having a lifting function for a hopper table on which forms are loaded and a paper feeding function for feeding forms.

The paper feeding device sequentially feeds out documents mounted on a hopper table one by one, and is used as a device for supplying documents to a device that performs predetermined processing on the documents.

A typical example of this is a character that handles OCR forms, etc.
There are graphic reading devices and printing devices that handle sheet-like paper. (Hereinafter, forms and forms will be collectively referred to as forms.

) In this way, the paper feeding device is incorporated into a form processing device, and there is a demand for a low-cost device with a small device volume.

[Conventional technology]

2. Description of the Related Art Conventionally, paper feeding apparatuses having configurations as shown in FIGS. 3 to 6, for example, have been used.

The example shown in FIG. 3 shows a paper feeding device configured to horizontally mount a form 11 on a hopper table 1. In this case, the bell 30 is required, and it is difficult to accommodate various sizes of forms.

The example shown in FIG. 4 shows a paper feeding device configured such that a form 11 is mounted on a hopper table 1 arranged diagonally.

In this case, since the forms were mounted diagonally, the number of stacked forms was small.

The example shown in FIG. 5 shows a paper feeding device configured to apply a load necessary for paper feeding from below to the paper feeding roller 2 side using an elastic body such as a spring 31. In this case, it was necessary to push down the hopper table by hand when loading the forms, which was a hassle.

In each of the configurations shown in FIGS. 3, 4, and 5, the paper feed roller 2 is always in contact with the form 11 during paper feeding, and therefore is not suitable for a reading device or the like that does not like dirt.

The example shown in Fig. 6 eliminates the problems of the conventional examples shown in Figs. 3, 4, and 5, and has a hopper table lifting mechanism 32, which lowers when loading forms and lowers when feeding paper. Figure 3 shows a paper feeder with a rising configuration.

In this apparatus, the raising and lowering operation of the hopper table 1 and the paper feeding operation of the paper feeding roller 2 are performed by a driving motor, but both are constructed by separate driving motors.

[Problem that the invention seeks to solve]

In the conventional example shown in FIG. 6, the hopper table and paper feed roller have separate drive units, resulting in a high price and a large device capacity.

The present invention has been made in consideration of the above points, and aims to provide a paper feeding device that is capable of loading a large number of sheets with a minimum number of drive units, and is also resistant to dirt. There is.

[Means for solving problems]

FIG. 1 shows a block diagram of the principle of the paper feeding device of the present invention.

In FIG. 1, 1 is a hopper table on which a form 10 is mounted, 2 is a paper feed roller that feeds out the form 10 mounted on the hopper table 1, 3 is a hopper table lifting mechanism that moves the hopper table 1 up and down, and 4 5 is a transmission mechanism consisting of a motor pulley, etc. that transmits the power to drive the hopper table lifting mechanism 3 and the paper feed roller 2, and 5 is a reversibly rotatable motor that generates the power to be transmitted to the transmission mechanism 4. , is configured to be able to perform paper feeding operations and hopper table lifting/lowering operations.

[For production]

In the present invention, a reversible rotatable motor is used, and by rotating in one direction to feed the paper and rotating in the opposite direction to raise and lower the hopper table, it is cheaper with a minimum number of drive parts.
It becomes possible to provide a paper feeding device with a small device volume.

〔Example〕

FIG. 2 is a diagram for explaining an embodiment of the paper feeding device according to the present invention, in which FIG. 2(a) is a side view, and FIG. FIG.

In the figure, reference numeral 5 denotes a drive motor, which is composed of, for example, a stepping motor, rotates in forward and reverse directions according to an input signal, and is fixed to the side plate 14 by fastening means (not shown); 6 is a drive motor; The key tab is connected to the rotating shaft 5a of the drive motor 5, and is connected to the belt 7.
8 is a paper feed pulley which is rotatably driven by the power transmitted via the belt 7 to the side plate. By rotating the paper feed roller shaft 9 rotatably supported by the paper feed roller 10
It rotates to feed out the form 11, and has a one-way clutch bearing (not shown) and a one-way clutch bearing (not shown).
The direction of the arrow indicated by symbol a in FIG. 2 is the forward direction of the drive motor 5. ) is capable of transmitting rotational force, 12 is a hopper table pulley, which has a one-way clutch bearing (not shown), and has a one-way clutch bearing (not shown). (The direction is the opposite direction of the drive motor 5.)
13 is a rotating shaft connected to the hopper table pulley 12 via a one-way clutch bearing. It is rotatably supported by the side plate 14 and has an arm member 15 on the other end side.
It has a roller 16 for lifting and lowering the hopper table that comes into contact with a, and by rotating this roller 16 for lifting and lowering the hopper table around an axis, the side plate 17a of the hopper table 17 is moved up and down, and 18 is a hopper part spring. The hopper table 17 is always urged upward to press the form 11 against the paper feed roller 10, and 19 is a separation roller which is arranged alternately with the paper feed roller 10. , for undulating the two-sheeted form 11 and separating it into one sheet; 20 is a separation band, which is supported by a member rotatable about axis 0 and is made of a high-friction member; A spring 21 separates the lower form 11 and prevents two sheets from being fed. The spring 21 presses the separation band 20 toward the separation roller 19.

Note that the hopper table 17 is rotatably supported around a fulcrum P.

The operation of the configuration described above will be explained.

[Paper feeding operation]

In the state shown in FIG. 2 (al), when the drive motor 5 is rotated downward, power in the forward direction is transmitted to the paper feed pulley 8 and the hopper table boot IJ12 via the motor pulley 6 and the belt 7.

Therefore, the paper feed roller shaft 9 is rotationally driven in the direction of arrow a,
A paper feeding operation is performed by the paper feeding roller 10.

At this time, the rotating shaft 13 connected to the hopper table pulley 12 does not rotate in the direction of arrow a, and no power is transmitted to the rotating shaft 13, so the hopper table 17 is pushed up by the urging force of the hopper spring 18. The paper feed roller O is brought into pressure contact with the form 11.

After the document 11 is fed out by the paper feed roller 10, when the document 11 is bitten by the separation roller 19 or the conveyance roller (not shown) provided after the document 11, the drive motor 5 is rotated in the opposite direction to transfer the document 11 to the hopper table 17. lowers it.

As a result, no frictional force is applied to the form 11 with the paper feed roller 10, so that staining of the form and electrical transmission of the form due to the paper feed roller 10 can be avoided.

[Lifting operation]

Furthermore, when the driving motor 5 is rotated in the opposite direction, power in the opposite direction is similarly transmitted to the paper feed pulley 8 and the hopper table pulley 12 via the motor pulley 6 and the belt 7.

Therefore, the rotating shaft 13 is rotationally driven in the direction of the arrow, and the hopper table 17 is driven by the hopper table lifting rollers 16.
is pushed downward.

At this time, the paper feed roller shaft 9 does not rotate in the direction of the arrow.
Since no power is transmitted to the paper feed roller 9, the paper feed operation is in a stopped state.

[Form loading operation]

First, the drive motor 5 is rotated in the opposite direction, and the hopper table lifting roller 16 is stopped at the bottom dead center.

Therefore, since the hopper table 17 is positioned at the lowest point, there is sufficient space between the paper feed roller 10 and the hopper table 17, and the form 11 can be easily loaded.

〔Effect of the invention〕

As described above, according to the present invention, by using a drive motor that can rotate reversibly, paper feeding, operation, and lifting and lowering of the hopper table can be performed by the same drive motor, which greatly reduces the device volume. A small and inexpensive paper feeding device can be provided, which is extremely useful in practice.

[Brief explanation of the drawing]

FIG. 1 is a principle block diagram of the paper feeding device of the present invention, FIG. 2 is a detailed explanatory diagram of the present invention, and FIGS. 3, 4, 5, and 6 are configurations of conventional paper feeding devices. FIG. In the figure, 1 is a hopper table, 2 is a paper feed roller, 3 is a hopper table lifting mechanism, 4 is a transmission mechanism, and 6 is a drive motor. 21i2 (b)

Claims (2)

[Claims] (1) Hopper table (1) where forms (11) are mounted
), a paper feed roller (2) for feeding the forms mounted on the hopper table (1), and a pressure roller for pressing the forms against the paper feed roller when feeding the forms. a hopper table lifting mechanism (3) that moves the hopper table up and down; a motor (5) that is reversibly rotatable; Transmission mechanism (4) that selectively transmits driving force
A paper feeding device having. (2) The transmission mechanism is a power transmission mechanism that is provided in each of the paper feed roller and the hopper table elevating mechanism and is capable of transmitting the driving force from the drive source in only one direction, and the power The paper feeding mechanism according to claim 1, wherein the transmission direction of the driving force is set so that the paper feeding roller and the hopper table lifting mechanism operate independently. Device.