JPS6348579Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a paper feeding device that feeds paper such as film originals in facsimile machines, etc. In particular, the paper is attracted to a suction pad, and the paper is sucked in this suctioned state. The present invention relates to a paper feeding device that feeds paper by moving a pad.

BACKGROUND OF THE INVENTION FIGS. 1 to 3 show this type of paper feeding device in a conventional facsimile machine. Film originals 2 are stored in a stacked state in a film box 1, and a pad drive disk 4 is fixed to a pad drive shaft 3 located above the film box 2.

This pad drive disk 4 has a pad mounting plate 5.
is fixed thereto, and a suction pad 6 in the form of a suction cup is attached to the lower end of the pad attachment plate 5.
This suction pad 6 is connected via a tube 7 to a vacuum pump (not shown).

The paper feed for film original 2 is shown in Figures 1, 2, and 3.
The suction pad 6 is initially located at the position shown by the solid line in FIG. 1. From this state, the pad drive disk 4 is rotated counterclockwise (arrow A) by a drive motor (not shown) via the pad drive shaft 3, and the suction pad 6 is thereby moved to the first position.
The film document 2 is approached as shown by the broken line in the figure.

The pad drive disk 4 is further rotated counterclockwise, and the pad mounting plate 5 is attached to the device body (not shown).
When the suction pad 6 comes into contact with a stopper 8 attached to the film document 2 and becomes perpendicular to the film document 2, the pad drive disk 4 stops rotating.
At the same time, the suction pad 6 is communicated with a vacuum pump, and the film original 2 is suctioned onto the suction pad 6.

Next, while the film original 2 is still attracted to the suction pad 6, the pad drive disk 4 is rotated clockwise (arrow B), and the film original 2 is moved to the feeding roller 9 as shown in FIG. be guided.

Problems that the invention aims to solve However, with such conventional paper feeding devices, the first
As shown in the figure, the movement of the suction pad 6 to approach the film original 2 in order to suction the film original 2 is a simple circular motion. 6 comes into contact with the film original 2 from an oblique direction, and at this time, the same film original 2
was being shifted in the opposite direction (arrow C) to the feeding roller 2.

Therefore, when a plurality of film originals 2 are stacked and stored in the film box 1 and these film originals 2 are fed one after another, the suction position of the suction pad 6 is shifted back and forth for each film original 2. ,
As a result, the leading edge of the film original 2 is not introduced into the fixed position of the feeding roller 9, resulting in a disadvantage that the feeding of the film original 2 cannot be carried out smoothly.

The present invention was developed to solve the above-mentioned drawbacks of the conventional paper.When the suction pad comes into contact with paper such as a film original to adsorb the paper, the paper does not shift, and the paper is always fed smoothly. The purpose of this paper is to provide a paper feeding device that can be used for

Means for Solving the Problems The paper feeding device according to the present invention includes a drive member that rotatably supports a pad mounting portion having a plurality of suction pads and raises and lowers the pad mounting portion as it rotates in both forward and reverse directions. and a guide portion that restricts movement of a support shaft provided on the pad attachment portion and holds the suction port of the suction pad relative to the paper to be fed.

Effect With this configuration, when sucking paper, the suction port moves parallel to the paper surface for a certain period of time, so it can create friction with the next paper to be fed. This prevents paper from shifting due to friction between the sheets.

Embodiment An embodiment of the present invention will be described below based on the drawings.

4 to 9 show an embodiment in which the present invention is applied to a feeding device for feeding a film original onto a drum in order to automatically wind the film original around the drum in a facsimile machine. Note that the same numbers are given to the same members as in the conventional example.

Film originals 2 are stored horizontally and stacked in a film box 1, and above the film box 1, a pad drive shaft 3 is rotatable to the main body of the apparatus (not shown). The pad driving shaft 3 is provided in a freely supported state, and is adapted to be rotated by a pad driving motor 10 attached to the main body. Further, the rotational position of the pad drive shaft 3 is detected by a rotational position detection sensor 11.

One pad drive disk 4 is fixed to each end of the pad drive shaft 3, and each pad drive disk 4 is provided with a substantially sector-shaped cutout 12. A bracket 14 is rotatably supported on each of the pad drive disks 4 via a support shaft 13, and a pad mounting plate 5 is attached to each of the brackets 14.
is fixed.

A roller shaft 15 is provided at both ends of the pad mounting plate 5.
are provided protrudingly, and these roller shafts 15 pass through the notches 12 of each pad drive disk 4, so that the pad mounting plate 5 has a roller shaft 15 that extends through the notches 12 of each pad drive disk 4.
When it comes into contact with the two sides 16 and 17 of the pad drive disk 4, it is no longer possible to rotate about the support shaft 13 relative to each pad drive disk 4.

Further, a spring 18 is interposed between the pad mounting plate 5 and the pad driving disk 4, so that the pad mounting plate 5 can move the roller shaft 15 along the side 1 of the notch 12.
It is biased in the direction of bringing it into contact with 7. moreover,
A plurality of suction cup-shaped suction pads 6 are attached to the lower end of the pad mounting plate 5, and these suction pads 6 are connected to a vacuum pump (not shown) through a tube 7.
It is connected to the.

The main body includes a disc-shaped roller shaft guide 19,
It is attached near the pad drive disk 4 and below the pad drive shaft 3. Note that the center of the roller shaft guide 19 is positioned within a vertical plane containing the axis of the pad drive shaft 3.

A feed-out roller 9 is provided behind the pad drive disk 4, and this feed-out roller 9 is adapted to be rotated by a feed-out roller drive motor 21 via a coupling 20. A drum (not shown) is provided behind the feeding roller 9.
is provided.

Next, the operation of this device will be explained with reference to FIGS. 5 to 9.

Initially, the pad drive disk 4 is in the state shown in FIG. 5. In this state, the roller shaft 15 is in contact with the side 17 of the notch 12 by the force of the spring 18, and the suction pad 6 is moved toward the feeding roller 9. ing. From this state shown in FIG. 5, the pad drive disk 4 is rotated counterclockwise (arrow D) by the pad drive motor 10. Then, since the roller shaft 15 is brought into contact with the side 17 of the notch 12 by the force of the spring 18 as described above, the pad mounting plate 5 is also rotated counterclockwise together with the pad drive disk 4. .

Therefore, when the pad drive disk 4 is rotated to a certain position, the roller shaft 15 comes into contact with the roller shaft guide 19 as shown in FIG. As a result, if the centers of the pad drive shaft 3, the support shaft 13, the roller shaft 15, and the roller shaft guide 19 are respectively O ₃ , O ₁₃ , O ₁₅ and O ₁₉ , then the points connecting these points are O ₃ , O ₁₃ , A link between O ₁₅ and O ₁₉ is formed, and the suction pad 6 is in a state perpendicular to the film original 2.

In addition, so that the ring forms a parallelogram,
Distances between O ₃ and O ₁₃ , between O ₁₃ and O ₁₅ , and between O ₁₉ and O ₃ , and roller shaft 15 and roller shaft guide 19
The diameter of each is determined.

When the pad drive disk 4 is further rotated counterclockwise (arrow D) from the state shown in FIG. 6, the roller shaft 15 is separated from the surface 17 of the notch 12 as shown in FIG. This time, move along the circumferential surface of the roller shaft guide 19 and follow the arrow E.
Go down in the direction. At this time, the suction pad 6 is always perpendicular to the original film 2 due to the action of the link.

Therefore, the suction pad 6 holds the film original 2 while maintaining its perpendicular state to the film original 2.
The film document 2 is lowered toward the film document 2, and is attracted to the film document 2 by the suction force of the vacuum pump.

In this way, in this device, the suction pad 6 approaches the film original 2 in a state perpendicular to the film original 2, so that when the suction pad 6 comes into contact with the film original 2, the film original 2 may be displaced. Nothing happens. Therefore, the suction pad 6 always suctions the film original 2 at a fixed position.

On the other hand, the rotational position detection sensor 11 detects the rotational position of the pad drive shaft 3 and sends out a signal to reverse the pad drive motor 10 when the suction pad 6 attracts the film original 2 as described above. do.

As a result, the pad drive motor 10 starts rotating in reverse, and the pad drive disk 4 is now rotated clockwise. Therefore, as shown in FIG. 8, the suction pad 6 continues to suction the film original 2 and ascends (in the direction of arrow F) while maintaining the vertical state, following the reverse process.

As the pad drive disk 4 continues to rotate clockwise (arrow G), the roller shaft 15
is separated from the roller shaft guide 19, comes into contact with the side 17 of the notch 12 again, and is thereafter rotated clockwise integrally with the pad drive disk 4. As a result, the suction pad 6 is moved to the feeding roller side, and one end of the film document 2 is moved to the feeding roller 9.
guided by.

When one end of the film original 2 is guided to the feeding roller 9 in this way, the suction pad 6 is no longer communicated with the vacuum pump due to a valve not shown being closed, etc., and loses suction power, and the film original 2 is moved to the suction pad 6. be freed from Then, the film original 2 is transferred to the drum by the feeding roller 9, and is automatically wound around the drum.

In this embodiment, the suction pad 6 is attached to the film original 2.
Since the film original 2 does not shift when coming into contact with the film original 2 and the suction pad 6 always attracts the film original 2 at a fixed position, the film original 2 is always introduced into the fixed position of the feeding roller 9. Therefore, the film document 2 is always smoothly transferred by the feeding roller 9.

Note that even if the spring 18 is not provided, the roller shaft 15 will come into contact with the side 17 of the notch 12 and the roller shaft guide 19 due to gravity, so it is not necessarily necessary to provide the spring 18, but it is possible to provide the spring 18 as in this embodiment. The pad mounting plate 5 can be moved more smoothly.

Effects of the Invention As described above, the paper feeding device according to the invention includes a drive member that rotatably supports a pad attachment portion having a plurality of suction pads and that raises and lowers the pad attachment portion as it rotates in both forward and reverse directions. and a guide section that restricts the movement of the spindle provided on the pad attachment section and holds the suction port of the suction pad relative to the paper to be fed, thereby making it possible to prevent the paper from being fed when the paper is fed. This has the excellent effect of preventing sheet displacement due to friction between the sheets and ensuring smooth sheet feeding at all times.

[Brief explanation of the drawing]

1 to 3 are side views of main parts showing the operating state of a conventional paper feeding device, FIG. 4 is a perspective view showing an embodiment of the paper feeding device of the present invention, and FIGS. 5 to 9 are FIG. 3 is a side view of main parts showing the operating state of this embodiment. 2... Film original, 4... Pad drive disk, 5... Pad mounting plate, 6... Suction pad, 1
0...Pad drive motor, 12...Notch, 15...
...Roller shaft, 18...Spring, 19...Roller shaft guide.

Claims (1)

[Scope of utility model registration request] a pad attachment part 5 having a plurality of suction pads 6 at its end; a drive member 4 that rotatably supports the pad attachment part 5 and raises and lowers the pad attachment part 5 as it rotates in both forward and reverse directions; The support shaft 15 provided on the pad attachment part 5 and the support shaft 15
and a guide section 19 fixed at a fixed position to restrict the movement of the suction pad 6 and hold the suction port of the suction pad 6 parallel to the sheet 2 to be fed.