JPS634037Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a paper feeding and cutting device, particularly for feeding and accurately cutting recording paper or receiving paper of a facsimile machine or similar electrophotographic application device equipped with a recording roll paper to a certain length. The present invention relates to a paper feeding/cutting device such as a facsimile machine that can be used for cutting paper.

In a conventional device of this type, after paper is fed out from a paper feed device in response to a paper feed signal, a paper cutter is operated in response to a cut signal to cut the paper. However, in such devices, the timing between the paper feed signal and the cutting signal may be out of order, or the drive system often overruns during paper feeding, resulting in a dimensional difference in the paper feeding length, resulting in the cut recording paper or the received paper being cut. There were cases where the lengths were different.

The present invention eliminates the above-mentioned conventional problems and allows paper feeding and cutting to be performed using only paper feeding signals.
Moreover, it is an object of the present invention to provide a paper feed cutting device such as a facsimile device that can cut paper to an accurate length.

According to the present invention, a paper feed roller, a paper cutting mechanism, a first clutch fixed to a first rotating shaft, and a clutch coupled to a driven shaft of the first clutch are connected to the rotating shaft of the paper feeding roller. a first power transmission mechanism that transmits power; a second power transmission mechanism that is coupled to the first rotation shaft and transmits power to the second rotation shaft; and a second power transmission mechanism that is fixed to the second rotation shaft. a second clutch;
A shaft of a paper cutting mechanism coupled to a driven shaft of the second clutch, a drive mechanism for driving the first rotating shaft, and a coupling of the second rotating shaft and the driven shaft of the second clutch. While releasing the first clutch, the driven shaft of the first clutch is coupled to the first rotating shaft, and when the first rotating shaft rotates by a predetermined amount, the driven shaft of the first clutch is released. a braking switching mechanism for the first and second clutches that disconnects the drive shaft from the first rotating shaft and connects the driven shaft of the second clutch to the second rotating shaft; A paper feeding and cutting mechanism for a facsimile machine is provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the overall configuration of a paper feeding and cutting device according to an embodiment of the present invention. First, paper feed roller 8, pinch roller 9, spring clutch 5
and spring clutch 5 to paper feed roller 8
The paper feeding mechanism of the present invention is constituted by the gears 6 and 7 that transmit rotational force to the paper feed mechanism. Further, the paper cutting machine 15 and the spring clutch 13 constitute a paper cutting mechanism. The spring clutch release lever device is rotatably supported on a shaft 17, has a pawl 18 at one end, and is attached to a connecting rod 2 of a solenoid valve 20.
1, a lever 23 pivotally attached to the other end of this lever 16, a lever 27 supported by a shaft 26 and having a claw 29 at its tip, and a tension spring attached to these levers. 24, 31, 3
2. The drive mechanism that applies rotational force to the spring clutches 5 and 13 includes a feed motor 1, a pulley 2 attached to its output shaft, and a pulley 4.
It includes gears 11, 12, and 14, and a timing belt 3 placed between pulleys 2 and 4.

Next, the mutual positional relationship of the above-mentioned mechanisms and their functions will be explained.

The rotational force of the feed motor 1 is transmitted to a pulley 4 via a pulley 2 and a timing belt 3. The pulley 4 is fixed to a first rotating shaft 4a. A gear 11 is fixed to one end of the rotating shaft 4a, and a first clutch (spring clutch) 5 is fixed to the other end. FIG. 5 is a sectional view of the connecting portion between the spring clutch 5 and the first rotating shaft 4a. The spring clutch 5 connects the first rotating shaft 4a and the driven shaft a via a spring 5b, and one end of the spring 5b is fixed to a cylindrical member 5c having a groove 19 (FIG. 1). Further, a gear 6 is fixed to the driven shaft 5a. Claw 18
(Fig. 1) is not engaged with the groove 19, the first
As the rotating shaft 4a rotates, the spring 5b tightens, and the first rotating shaft 4a and the driven shaft 5a are coupled via the spring 5b. At this time, gear 6
rotates, and the rotational force is transmitted to the roller 8 via the gear 7.
is transmitted to the rotating shaft 8a. On the other hand, the claw 18 is
9, the spring 5b is not tightened, so the first rotating shaft 4a and the driven shaft 5a are not coupled. The recording paper 10 is pressed between the pinch roller 9 and the feed roller 8, and is sent toward the paper cutting machine 15 by the rotation of the feed roller 8. The rotational force of the gear 11 fixed to one end of the first rotating shaft 4a is transmitted to the gear 14 via the idler gear 12. gear 1
4 is fixed to a second rotating shaft, and a second clutch (spring clutch) 13 is fixed to the second rotating shaft. Figure 6 shows spring clutch 1
3 is a sectional view of a connecting portion between the paper cutting machine 15 and the shaft 15a of the paper cutting machine 15. The shaft 15a is located on the central axis of the gear 14, and a driven shaft 15b of the spring clutch 13 is fixed to one end. Spring clutch 1
3 has the same coupling structure as the spring clutch 5, and one end of a spring 15c is fixed to a cylindrical member 15d having a groove 30. Claw 29 is groove 3
0, the spring 15c tightens as the second rotating shaft 13a rotates, and the second rotating shaft 13a and the driven shaft 15b are coupled. At this time, the paper cutting machine 15 cuts the paper. On the other hand, nail 2
9 engages with the groove 30, the second rotating shaft 13a and the driven shaft 15b are not coupled. At this time, the paper is not cut. The pawl 18 of the lever 16 engages with the groove 19 of the spring clutch 5, thereby braking the spring clutch 5 and releasing the connection between the driven shaft of the spring clutch 5 and the first rotating shaft 4a. I'm keeping it. Therefore, in this state, the rotational force of the first rotating shaft 4a is not transmitted to the gear 6.
As shown in FIG. 2, when the solenoid valve 20 is actuated, the lever 16 pivots about the shaft 17 via the connecting rod 21, and the pawl 18 disengages from the groove 19 of the spring clutch 5. As a result, the driven shaft of the spring clutch 5 is connected to the first rotating shaft 4.
a, and the rotational force of the first rotating shaft 4a is coupled to the gear 6
It is transmitted to At the same time, the movement of this lever 16 is magnified by the lever ratio, and the lever 2 pivoted on the shaft 22
Move 3. The lever 23 has a claw 25 as shown in the figure.
is provided. The claw 25 of the lever 23 is the lever 27
engages with the claw 28 of. Further, the pawl 29 at the tip of the lever 27 engages with the groove 30 of the spring clutch 13 to brake the spring clutch 13 and to connect the driven shaft to the second rotating shaft to which the gear 14 is fixed. Keep it in a state of release. Therefore, in this state, the rotational force of the gear 14 is applied to the shaft 15 of the paper cutting mechanism.
It is not communicated to a.

In such a configuration, when the feed motor 1 is driven, the pulley 4 is rotated by the pulley 2 and the timing belt 3 in the direction of the solid arrow in FIG.
Therefore, the gear 14 rotates from the gear 11 via the idle gear 12 in the direction of the solid arrow.

In this state, the paper feed signal has not yet been received, so as shown in FIG.
9 and groove 30 are engaged with each other, and paper feeding and paper cutting operations are not performed. The drive energy of the feed motor 1 is stored as a spring deformation of the spring clutches 5, 13.

Next, the solenoid valve 20 is activated by the paper feed signal pulse.
When turned on, the lever 16 is activated via the connecting rod 21.
, the pawl 18 and the groove 19 are disengaged, thereby causing the spring clutch 5 to rotate, and the gears 6 and 7 to rotate the feed roller 8 in the direction of the dotted arrow to feed the recording paper 10. Send in the direction of the solid arrow. Further, the claw 25 of the lever 23 jumps over the claw 28 due to the tension spring 31, and the state shown in FIG. 1 is changed to the state shown in FIG. 2. At this time, the paper feed roller 8 is rotating, but the clutch 13 of the paper cutting mechanism is stopped, and the paper cutting machine 15 does not work. Arrow direction of spring clutch 5 (Fig. 2)
As the spring clutch 5 rotates, the pawl 18 slides on the outer periphery of the spring clutch 5 due to the tension spring 24, and the groove 19
It engages and stops.

Accordingly, the feed roller 8 also rotates once and stops, and the recording paper 10 is also fed by the circumferential length πD of the feed roller 8 and then stops. Further, when the pawl 18 falls into the groove 19, the lever 23 is pulled back by the tension spring 24, and the pawls 25 and 28 are engaged, causing the lever 27 to pivot about the shaft 26, so that the pawl 29 engages the spring clutch 13. 3, the spring clutch 13 rotates as shown in FIG. This spring clutch 13
The rotation causes a cutting blade (not shown) of the paper cutting machine 15 to rotate and cut the recording paper 10. The spring clutch 13 rotates once and the pawl 29 pulls the tension spring 32.
When the spring clutch 13 is engaged with the groove 30, the spring clutch 13 is stopped and returns from the state shown in FIG. 3 to the state shown in FIG. 1.

FIG. 4 shows another embodiment of the present invention. As shown in FIG. 4, the spring clutch 5
A gear 33 is fixed to the outer periphery of the gear 3 that meshes with the gear 33.
A stop groove 35 is installed at 4. By changing the gear ratio between the gear 33 and the gear 34, the recording paper feed length can be arbitrarily selected. Furthermore, by changing the ratio of the gears 6 and 7 shown in FIG. 1, the feed length can be arbitrarily set in the same way as described above.
Although the above-described embodiment assumes that a rotary cutting machine is used to cut the paper, it is of course possible to drive a vertical cutting machine.

In this way, in the present invention, the recording paper is sent out only by the paper feed signal, and the paper cutting operation is linked with the paper feed mechanism, so that the paper feed mechanism is always stopped when the cutting machine operates. Therefore, the fed recording paper is accurately cut to a constant length and is not affected by overrun of the paper feeding mechanism. There are many advantages such as the ease of changing the paper feed length.

[Brief explanation of drawings]

Fig. 1 is an overall perspective view of a paper feeding and cutting device according to an embodiment of the present invention, Fig. 2 is a schematic side view showing the operation of the paper feeding and cutting device when the paper feeding mechanism is working, and Fig. 3 is a FIG. 4 is a partial side view showing another embodiment of the present invention, and FIG. 5 is a schematic side view showing the operation of the paper cutting mechanism when it works. FIG. 6 is a cross-sectional view showing the connecting portion between the clutch and the first rotating shaft, and FIG. 6 is a cross-sectional view showing the connecting portion between the second clutch and the shaft of the paper cutting machine used in the embodiment of the present invention. 1...Feed motor, 5, 13...Spring clutch, 6, 7, 11, 12, 14...Gear, 8
...Paper feed roller, 18,29...Claw, 19,3
0...Groove, 20...Solenoid valve.

Claims (1)

[Scope of utility model registration request] a paper feed roller, a paper cutting mechanism, a first clutch fixed to a first rotating shaft, and a first clutch coupled to the driven shaft of the first clutch and transmitting power to the rotating shaft of the paper feeding roller. a power transmission mechanism, and the first
a second power transmission mechanism coupled to the rotating shaft of the clutch and transmitting power to the second rotating shaft; a second clutch fixed to the second rotating shaft; and a driven shaft of the second clutch. While the shaft of the paper cutting mechanism coupled to the shaft of the paper cutting mechanism, the drive mechanism for driving the first rotary shaft, and the second rotary shaft and the driven shaft of the second clutch are uncoupled, the The driven shaft of the first clutch and the first rotating shaft are coupled together, and when the first rotating shaft rotates by a predetermined amount, the driven shaft of the first clutch and the first rotating shaft are connected. a paper feed/cutting mechanism for a facsimile machine, the mechanism including a braking switching mechanism for the first and second clutches, and a brake switching mechanism for coupling the driven shaft of the second clutch with the second rotating shaft. .