JPS6224534Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a paper feeding device that drives the recording paper and original documents of recorders.

Conventionally, a paper feeding system as shown in FIG. 1 has been known. In the figure, recording paper 1 is placed on drum 2 and drum 3.
It is sent sandwiched in between. The drum 2 is driven by a motor 7 via a friction clutch 4. The friction clutch 4 consists of two pressure discs 4A and 4B.
Power is transmitted by surface friction between both plates 4A and 4B. On the other hand, there is a disk 5 rotatably connected to the side surface of the disk 4A, and this shaft 8 reaches a knob 6.
During normal power feeding, the friction clutch 4 is in the engaged state, and the power of the motor 7 is transmitted to the drum 2. To manually feed this, rotate knob 6 by hand. If this rotation is faster than the rotation of the motor 7, the friction clutch 4 causes a slip between the two discs 4A and 4B, and the manual torque is transmitted from the disc 5 to the disc 4A, causing the drum 2 to rotate.

Such a conventional configuration has the following drawbacks.

○B The friction clutch 4 is operated by the surface friction of both discs 4A and 4B, and if the condition of the surfaces changes and the friction characteristics change, the friction clutch 4 may slip during power feeding or may slip during manual feeding. There is great instability in practical use, as the friction clutch 4 may not be released.

(b) During manual feeding, it is necessary to drive the drum 2 while sliding the friction clutch 4, so the manual feeding load is heavy and excessive force is required.

○C Since the knob 6 is constantly rotating during power feeding, if it comes into contact with another object, the rotation speed of the drum 2 will go awry or stop.

The present invention eliminates these drawbacks and provides a device that has a simple mechanism and is capable of practical and reliable manual feeding.

FIG. 2 is a perspective view showing an embodiment of the present invention.
Components in the figure that are the same as those in FIG. In the present invention, an electromagnetic clutch 12 is used instead of the friction clutch 4 shown in FIG. 1, and a disk 11 is used instead of the disk 4A, which is connected to the disk 5. Disk 5
The shaft 8 is electrically insulated by a coupler 13 and reaches the knob 6. The knob 6 is mechanically coupled to the disk 5 and electrically insulated. A clutch driver 14 is connected to the knob 6 by a conductive wire. The clutch driver 14 consists of a touch sensor that detects the potential of the knob 6 and a portion that amplifies the output and opens and closes the electromagnetic clutch 12. Since its operation and configuration are well known, their explanation will be omitted here.

If you cannot touch knob 6, use electromagnetic clutch 1.
2 is closed, and the driving force of the motor 7 rotates the drum 2 via the clutch 12. When the knob 6 is touched, the clutch driver 14 is actuated to open the electromagnetic clutch 12, and as a result, the power of the motor 7 is cut off by the electromagnetic clutch 12. Therefore, the manual rotation force of the knob 6 rotates the drum 2 via the disks 5 and 11. Since the electromagnetic clutch 12 is open at this time, it is not affected by the rotation of the motor 7, and no extra rotational force is required, allowing the drum 2 to be easily rotated by hand. Immediately when the knob 6 is released, the electromagnetic clutch 12 is closed and the motor 7 automatically switches to power rotation. With this configuration, there is no need to use a friction type electromagnetic clutch 12, and a dog couple or the like can also be used, so instability related to friction can be eliminated.

Although not shown in FIG. 2, another electromagnetic clutch may be inserted between the disc 5 and the knob 6 and connected to the clutch driver 14 so as to open and close in reverse to the operation of the electromagnetic clutch 12. In this way, when the knob 6 is not touched by hand, the additional electromagnetic clutch will cause the disc 5 to
Since the connection between the drum 2 and the knob 6 is cut off, the rotation of the drum 2 by the motor 7 is not transmitted to the knob 6, thereby improving the drawbacks of the conventional system mentioned above. In this case, it is not necessary to use two electromagnetic clutches, and the connection of the drum 2 to the motor 7 and the knob 6 may be switched using one transfer type clutch.

As mentioned above, the present invention is a paper feed device that has a touch sensor on the manual feed knob and uses the signal to operate an electromagnetic clutch to switch from power feeding to manual paper feeding, and when the knob is released, it automatically moves. Since the system returns to power feeding immediately, operability is improved and it is extremely useful in practice.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of the structure of a conventional paper feeding device, and FIG. 2 is a perspective view showing a paper feeding device in an embodiment of the present invention. 1...recording paper, 2...drum, 3...drum,
5...disk, 6...knob, 7...motor, 8...
...Shaft, 11...Disc, 12...Electromagnetic clutch, 1
3...Coupler, 14...Clutch driver.

Claims (1)

[Scope of utility model registration request] A drum for moving rolled paper by a drive motor, an electromagnetic clutch disposed between the drum and the drive motor, a transmission means for transmitting manual rotational force of a knob for manual paper feeding to the drum, and the knob. A paper feeding device comprising: a sensor for detecting a human body contact; and an opening/closing means that opens the electromagnetic clutch only when the sensor detects a human body contact, and cuts off a driving force system of the drive motor for the drum.