JPH0745085Y2 - Paper stripping device for printer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a paper peeling device of a printer capable of changing the position of a peeling claw or the like in the paper width direction according to the paper width of a transfer paper.

[Background technology]

In an electrophotographic printer, a traveling transfer paper is brought into contact with the surface of a rotating photosensitive drum (photoconductor), and toner on the surface of the photosensitive drum is transferred onto the transfer paper. At this time, in order to prevent the transfer paper that has been transferred from being rolled up on the photosensitive drum, a peeling claw (paper peeling device) that contacts the surface of the photosensitive drum and peels the transfer paper from the surface of the photosensitive drum is provided. There is.

By the way, since the peeling claw is always in contact with the surface of the rotating photosensitive drum, the fixed type peeling claw causes an adverse effect that the specific surface of the photosensitive drum is worn by long-term use. Therefore, a transfer paper separating device has been proposed in which the peeling claw is continuously and repeatedly moved in the paper width direction (see, for example, Japanese Utility Model Publication No. 58-53547).

An object of the present invention is to provide a paper peeling device for a printer, which has a novel function in addition to such a technique for preventing abrasion of the photosensitive drum.

[Constitution of device]

The paper peeling device 1 of the printer according to the present invention is configured such that the peeling claw 2 is brought into contact with the surface of the photosensitive drum (photoreceptor) 10,
When configuring a paper peeling device for peeling the transfer paper 11 from 10, the even number of peeling claws 2a, 2b, 2c, 2d, and paired peeling claws 2a and 2d, further 2b and 2c width of the transfer paper 11 Peeling claw moving means 3 for moving symmetrically in the direction, and peeling claw moving means 3
Controlling means for setting the peeling claws 2a ... to a position (including a static position and a dynamic position) corresponding to the paper width, and changing the suction area in the paper width direction of the suction device 66 for sucking the transfer paper 11. Is provided with a control means 4 for controlling.

[Function of device]

 Next, the operation of the present invention will be described.

The paper peeling device 1 of the printer according to the present invention is based on the paper width information detected by a paper width sensor or the like or manually inputting the paper width information, and the peeling claw 2a corresponding to the paper width from the control means 4 to the peeling claw moving means 3. A control signal for setting the position of ... Is given. The peeling claw moving means 3 is based on this control signal.
2a are moved in the paper width direction of the transfer paper 11 to set an optimum position for the transfer paper 11. At the same time, the control means 4 changes the suction area in the paper width direction of the suction device 66 that sucks the transfer paper 11, so that the peeling claws 2a ...
The suction area of the suction device 66 that is optimal for the paper width is set.

〔Example〕

Next, an optimum embodiment according to the present invention will be described in detail with reference to the drawings.

First, in order to clarify the present invention, a schematic configuration of the label printer P will be described with reference to FIG.

Reference numeral 50 denotes a machine body, in which a supply reel 51 and a take-up reel 52 are arranged on reel shafts provided at the front and rear ends thereof. The take-up reel 52 and the cutter 53 can be selectively attached. Meanwhile, the aircraft 50
The photosensitive drum 10 is arranged in the middle. And supply reel
The transfer paper 11 supplied from the 51 is a guide post 55, and a plurality of roller mechanisms 56 including a pair of driving rollers and driven rollers.
The winding reel 52 is wound up through a traveling path N formed by a plurality of guide plates 57, guide posts 58, and the like.
At this time, the transfer paper 11 contacts the peripheral surface of the photosensitive drum 10.

Further, a transfer charger 61 is arranged on the traveling path N. The transfer charger 61 is supported by an arm 63 having a fulcrum 62 as a center of rotation, and in the figure, rotation in the clockwise direction brings the transfer paper 11 into contact with the peripheral surface of the photosensitive drum 10, and rotation in the counterclockwise direction causes the contact. To cancel. Then, this release allows the transfer paper 11 to be returned in the opposite direction. On the other hand, on the traveling path N located in front of the photosensitive drum 10, the transfer paper 11
Is provided with a paper sensor 64 for detecting the presence or absence of the photosensitive drum 10.
The suction device 66 using a belt that sucks the transfer paper 11 sent out from the device by a negative pressure for stable extraction, and the toner adhered to the transfer paper 11 guided by the suction device 66 by the pair of heat rollers 12 and 13. A fixing device 67 for fixing is provided.

On the other hand, with respect to the drum surface around the photosensitive drum 10 and before transfer, a main charger 71 which gives an electric charge to the photosensitive drum 10, a head 72 which gives information such as a figure or a character to be transferred to the photosensitive drum 10, a photosensitive member A developer 73 that attaches toner to the information portion of the drum 10 is sequentially arranged. Further, on the drum surface after the transfer, the peeling claw moving mechanism 21 having the peeling claw 2 for peeling the transfer paper 11 from the photosensitive drum 10 is arranged according to the present invention, and the sponge roller 77 and the magnet roller 76 are provided. Cleaner (Toner collector) 7
Eraser 79 to erase the charge on the photosensitive drum 10
Distribute.

Next, the paper peeling device 1 according to the present invention will be described with reference to FIGS.
It will be described with reference to the drawings.

First, the overall configuration will be described with reference to FIG.
The paper peeling device 1 is roughly classified into a peeling claw moving means 3 and a control means 4.
Be equipped with.

The control unit 4 further includes a paper width sensor 40 and a control function unit 41. The paper width sensor 40 can use, for example, an image sensor,
The position of the transfer paper 11 in the width direction is detected by facing the traveling path N of the transfer paper 11 located in front of the photosensitive drum 10 and attaching it to the guide plate 57 (see FIG. 5). The detection signal of the paper width sensor 40 is given to the control function unit 41. The control function unit 41 has an arithmetic function and outputs a control signal for controlling the position of the peeling claws 2a ... In response to the detection signal.
The control signal may include a second control signal that vibrates the peeling claw.

On the other hand, the peeling claw moving means 3 includes a driver 20 and a peeling claw moving mechanism.
The control signal of the control function unit 41 is supplied to the stepping motor 22 of the peeling claw moving mechanism 21 via the driver 20.

Next, a specific configuration of the peeling claw moving mechanism 21 is shown in FIG.
This will be described with reference to FIG. Reference numerals 23 and 24 denote guide rails whose both ends are fixed to the machine body 50 side and which are arranged along the axial direction of the photosensitive drum 10. On the guide rails 23 and 24, a pair of U-shaped plate materials are formed by bending. The four corners of the sliders 25 and 26 of the above are slidably inserted. The slider 25 (26 is also the same) is provided with peeling claws 2a and 2b rotatably supported by a shaft 27. The peeling claws 2a and 2b are the spring 2
It is pressed against the peripheral surface of the photosensitive drum 10 by 8, 29. On the other hand, a driven pulley 30 and a drive pulley 31 which is driven to rotate by a stepping motor 22 are arranged near both ends of the guide rails 23 and 24, respectively, and an endless belt 32 is laid between the pulleys 30 and 31 to move the device. Make up 33. In addition, sliders should be installed at equal positions on the endless belt 32.
Fix 25 and 26 respectively. This allows the endless belt 32
The sliders 25 and 26 can be moved symmetrically (opposite directions) in the paper width direction by moving the. Reference numeral 35 indicates a limit switch for restricting movement of the sliders 25 and 26.

Next, the function of the paper peeling device 1 will be described.

First, assume that a wide transfer paper 11 is loaded. In this case, the paper width sensor 40 automatically detects the paper width and gives this detection signal to the control function unit 41. Based on the signal, the control function unit 41 gives the driver 20 a control signal (including a movement direction signal and a movement amount signal) for moving the peeling claws 2a ... To a corresponding set position. The set position is preset as an optimum position corresponding to the paper width. As a result, the stepping motor 22 is actuated and the endless belt 32 is moved, so that the sliders 25,
26 is stopped at a predetermined separated position.

On the other hand, when the narrow transfer paper 11 is loaded, the paper width sensor
40 detects the paper width, which causes the control function unit 41 to
A control signal (movement direction signal and movement amount signal) for moving 2a ... to a position corresponding to the paper width is given to the driver 20. As a result, as shown in FIG. 4, both sliders 25 and 26 move symmetrically toward the center and stop at the approaching positions.

In this way, when an arbitrary transfer paper 11 is loaded, the optimum width of each peeling claw 2a ... Corresponding to the paper width is automatically set.
Further, the peeling claws 2a ... Are moved in the axial direction of the peripheral surface of the photosensitive drum 10 in accordance with the paper width, and an effect of reducing wear on the peripheral surface of the photosensitive drum 10 is obtained. At this set position, a second control signal is applied from the control function unit 41 to the stepping motor 22 to periodically slide the peeling claws 2a in the circumferential surface axial direction of the photosensitive drum 10 within a constant amplitude range. By doing so, it is possible to reduce the wear of the peripheral surface of the photosensitive drum 10.

On the other hand, the control signal output from the control function unit 41 is directly supplied to the suction device 66 so that the suction area can be changed according to the paper width. In this case, a change means for changing the suction area may be provided. For example, if the suction port of the suction device 66 is covered with a movable shield plate and the shield plate is moved by a stepping motor controlled by a control signal. Good. As a result, the optimum suction area for the paper width is set.

Although the embodiment has been described above, the present invention is not limited to such an embodiment, and may be applied to, for example, changing the width of a guide roller or the like which is another functional part of the traveling system. In addition, the configuration, shape, arrangement, quantity, etc. can be arbitrarily changed without departing from the gist of the present invention.

[Effect of device]

As described above, the paper peeling device of the printer according to the present invention includes the peeling pawl moving means for moving the pair of peeling pawls symmetrically in the width direction of the transfer paper, and the peeling pawl moving means, which has the even number of peeling pawls. Since the control means controls and sets the peeling claw at a position corresponding to the paper width, and also controls the changing means for changing the suction area in the paper width direction in the suction device for sucking the transfer paper, the following remarkable Has a great effect.

Since the optimum position of the peeling claw can be set according to the paper width, a reliable peeling effect can be expected without being influenced by the paper width of the transfer paper. Without photosensitive drum (photoreceptor)
The basic effect of reducing wear can be enjoyed.

At the same time as setting the optimum position of the peeling claw, the common control means can change the suction area of the suction device that sucks the transfer paper. Therefore, the optimum suction area can be set for the paper width, and the cost and development are excellent.

[Brief description of drawings]

1 is a block system diagram of a paper peeling device of a printer according to the present invention, FIG. 2 is a front view of peeling pawl moving means in the paper peeling device, and FIG. 3 is a wide width setting of the peeling pawl of the peeling pawl moving means. 2 in the state shown in FIG. 2 in the direction of arrow A, FIG. 4: view in the direction of arrow A in FIG. 2 in which the peeling pawl of the peeling pawl moving means is set to a narrow width, and FIG. FIG. 2 is a schematic front view of an electrophotographic label printer including a printer. In the drawing, 1: paper stripping device 2,2a, 2b, 2c, 2d: stripping claw 3: stripping claw moving means, 4: control means 10: photosensitive drum (photoconductor) 11: transfer paper, 66: suction device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Shown 54-12441 (JP, U) Shown 56-49558 (JP, U) Shown 54-153241 (JP, U) Shown 58- 53547 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A paper peeling device for a printer, wherein a peeling claw is brought into contact with a surface of a photoconductor to peel a transfer paper from the photoconductor, the peeling claw having an even number of pairs, and the pair of peeling claws are arranged in a width direction of the transfer paper. Change the peeling claw moving means that moves symmetrically to and the peeling claw moving means to set the peeling claw at a position corresponding to the paper width and change the suction area in the paper width direction of the suction device that sucks the transfer paper. A paper peeling device for a printer, comprising a control means for controlling the means.