JPH0452766Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a device in a transfer printing device that transfers an image visualized by toner onto a recording paper and then peels the recording paper from a recording medium. It is.

Prior Art Many types of conventional transfer paper peeling devices have been put into practical use in electronic copying machines, etc., but in scanning magnetic printing devices that use a peeling belt and the belt is in constant contact with the recording medium, There was a risk that the belt, bearing, etc. would be damaged during high-speed rotation (for example, 4000 rpm) for latent image recording. Also, Figures 1 and 2
In the method shown in the figure, in which the endless peeling belt 3 is stretched between the recording drum 1 and the pulley 4 facing the recording drum 1, when recording a latent image, the peeling belt 3, the pulley 4
It is necessary to remove the tension on the peeling belt 3 so that the transfer roller 5 does not rotate, and furthermore, the recording head 2 starts recording from a position where it does not ride on the peeling belt 3. When a multi-channel head is used as described in the publication, there is a drawback that the recordable area becomes narrow.

Purpose of the invention The present invention was made to solve the problems of the prior art as described above.The purpose of the invention is to keep the peeling belt out of contact with the recording drum during high-speed rotation for latent image recording. Another object of the present invention is to provide a transfer paper peeling device that can prevent damage to a peeling mechanism and also make the recordable area wider than before by installing a peeling belt.

Structure of the Invention In order to achieve the above object, the present invention uses a transfer roller that can freely approach and separate from the recording medium, and an endless peeling belt that is stretched around a plurality of pulleys. , in a transfer paper peeling device of a transfer type printing device that transfers a developed image on the recording medium to a recording paper and peels the recording paper from the recording medium, the plurality of pulleys are arranged in a direction perpendicular to the axis of the transfer roller. first and fourth pulleys having a shaft and spaced apart from each other on both sides of the transfer roller; and an axis parallel to the axis of the transfer roller and disposed between the first and fourth pulleys. second and third pulleys that are disposed on both sides of the transfer roller, seventh and fifth pulleys that are coaxial with the second and third pulleys, respectively, and the transfer roller. and a coaxial sixth pulley, and the endless peeling belt is passed through the first and second pulleys, the transfer roller, and the third, fourth, fifth, sixth, and seventh pulleys in this order. When the transfer roller is separated from the recording medium, the endless belt is rotatably held only by the transfer roller and the plurality of pulleys without contacting the recording medium, and the transfer roller is separated from the recording medium. When pressed, the recording medium, the transfer roller, and the endless peeling belt are arranged so that the developed image on the recording medium is transferred to recording paper and the recording paper is peeled from the recording medium, and the transfer roller The endless peeling belt is pinched by the recording medium together with the recording paper, rotates in synchronization with the recording medium, transfers the visible image on the recording medium onto the recording paper, and peels the recording paper from the recording medium. It is characterized by being configured to.

Example Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 shows the entire magnetic printing device equipped with an embodiment of the present invention, and its structure and operation will be briefly explained. First, the magnetic drum 1, which is a recording medium, rotates and the erasing head 13 operates. . After the old latent image is erased, the cleaning blade 14 separates from the magnetic drum 1, and the magnetic drum 1 rotates at high speed (for example, 4000 rpm) in the direction of the arrow, and the magnetic latent image is recorded on the magnetic drum 1 by the recording head 2. . When the latent image recording is completed, the magnetic drum 1 moves at the copying speed (for example, 100 r.p.
m), and after the cleaning blade 14 comes into contact with the magnetic drum 1, it is developed with the magnetic toner 24 by the developing device 12, which is brought close to a predetermined position. The recording paper 6 on the paper feed tray 7 or 8 is fed out by the paper feed roller 21 or 22, and is fed out by the timing rollers 9a, 9b or 10a, 10b so as to match the image position on the magnetic drum 1, and the paper is fed. It is sent between the transfer roller 5 and the magnetic drum 1 by rollers 28a and 28b. When the leading edge of the recording paper 6 reaches the transfer position, the transfer roller 5
The solenoid 11 is energized so that the recording paper 6 is pressed against the magnetic drum 1. The toner image on the magnetic drum 1 is transferred to a recording paper 6, one end of which is held by a peeling belt 3 and peeled off from the magnetic drum 1, and the peeled recording paper 6 is transferred to a conveyor belt 16.
is guided between fixing rollers 17a and 17b. The fixed recording paper 6 is removed by peeling claws 18a and 18b.
The paper is peeled off from the fixing rollers 17a, 17b by the paper ejection rollers 19a, 19b,
is discharged. Toner remaining on the magnetic drum 1 without being transferred is scraped off by a cleaning blade 14, vacuum-suctioned by a cleaning section 15, and collected in a filter box (not shown).

4, 5, and 6 show the detailed structure of the peeling device according to the embodiment of the present invention, and the endless peeling belt 3 has seven pulleys 4a, 4b, 4c, 4d, 4e,
f, 4g and the transfer roller 5 to form a closed loop. The first pulley 4a is the slider 2
7 and is movably supported on the slide table 26, and the peeling belt 3 is supported by a spring 25.
It gives tension to. Further, the first pulley 4a is arranged so that its axial direction is perpendicular to the axial direction of the transfer roller 5.

A fourth pulley 4d is disposed at the farthest position on the opposite side of the first pulley 4a with respect to the transfer roller 5, and the axial direction of the fourth pulley 4d is perpendicular to the axial direction of the transfer roller 5. located so that
An endless peeling belt 3 is provided between the first pulley 4a and the fourth pulley 4d, and the second pulley 4b,
It is stretched across the transfer roll 5, the third pulley 4c, the fifth pulley 4e, the sixth pulley 4f, and the seventh pulley 4g. The second pulley 4b and the third pulley 4c have their axial directions parallel to the axial direction of the transfer roller 5, and are disposed on both sides of the transfer roller 5, sandwiching the transfer roller 5 between them. Further, the fifth pulley 4e is arranged coaxially with the third pulley 4c and is located in a symmetrical position with respect to the fourth pulley 4d in plan view (Fig. 6), and similarly, the seventh pulley 4g is located on the same axis as the third pulley 4c. 4b, and is located at a symmetrical position with respect to the first pulley 4a in plan view. Further, the sixth pulley 4f is disposed coaxially with the transfer roll 5 near its outer end, and is located between the fifth pulley 4e and the seventh pulley 4g.

Therefore, the peeling belt 3 is connected to the first pulley 4a.
and the second pulley 4b, between the third pulley 4c and the fourth pulley 4d, and between the fourth pulley 4d and the fifth pulley 4b.
between the seventh pulley 4e and the seventh pulley 4g and the first
are twisted between the first pulley 4a and the first pulley 4a.
The direction is changed between the pulley 4a and the fourth pulley 4d.

In this embodiment with the above configuration, when recording a latent image, the transfer roller 5 is stationary apart from the magnetic drum 1 at the position indicated by the dashed-dot line in FIG. 5, so the peeling belt 3 is also separated from the magnetic drum 1. , and stationary. Therefore, even if the magnetic drum 1 rotates at high speed (for example, 4000 rpm) at this time, the peeling belt 3 is not affected at all.

Further, when recording a latent image, the recording head 2 is moved so that the peeling belt 3 is attached to the magnetic drum 1, as shown in FIG.
Therefore, the scanning can be started from a position close to the outer edge of the magnetic drum 1 so as to enable recording from the position indicated by the two-dot chain line close to the inner edge of the peeling belt 3. Compared to the conventional apparatus shown in FIG. 1, which requires scanning to start from a position indicated by a two-dot chain line in the same figure, which is away from the inner edge of the peeling belt 3, the recordable area becomes wider.

When the latent image recording is completed and the magnetic drum 1 reaches the copying speed (for example, 100 rpm), the copying roller 5 is pressed against the magnetic drum 1 in alignment with the leading edge of the recording paper 6, and the transfer roller 5 pinches the recording paper 6. Rotate.
At this time, the peeling belt 3 also rotates together with the transfer roller 5, holding the recording paper 6 and peeling it off from the magnetic drum 1 while being guided to the second pulley 4b, whose direction is changed by the first pulley 4a, and then to the second pulley 4b. pulley 4b
The direction is changed again by the fourth pulley 4d, and the direction is changed again by the fourth pulley 4d. The image is returned to the transfer roller 5 via the pulley 4c.

Effects of the invention As explained above, according to the invention, the peeling belt constituting the recording paper peeling mechanism is held by a transfer roller and a plurality of pulleys and is configured independently of the recording medium. When the recording medium rotates at high speed during image recording, damage to the peeling belt and other peeling mechanisms is avoided, and since the peeling belt does not exist above the recording medium, the recording head does not interfere with the peeling belt unlike in conventional devices. This has the effect that the recordable area can be made wider compared to the conventional one.

Furthermore, in the present invention, the plurality of pulleys around which the endless peeling belt is stretched are constructed by combining a pulley having an axis perpendicular to the axis of the transfer roller and a pulley having an axis parallel to the axis of the transfer roller. Because there is
Despite using a large number of pulleys, it does not require much space, and therefore the peeling device can be installed by effectively utilizing the limited space of the transfer type printing device.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a conventional peeling device, Fig. 2 is a front view of the same as above, Fig. 3 is a schematic configuration diagram of the entire magnetic printing apparatus equipped with an embodiment of the present invention, and Fig. 4 is an implementation of the present invention. FIG. 5 is a front view of the example, and FIG. 6 is an enlarged partial view of FIG. 4. 1... Magnetic drum, 2... Recording head, 3...
Peeling belt, 4a to 4g...Pulley, 5...Transfer roller, 6...Recording paper.

Claims (1)

[Scope of utility model registration request] Using a transfer roller configured to move toward and away from the recording medium and an endless peeling belt stretched around multiple pulleys, the developed image on the recording medium is transferred to recording paper, and the recording paper is then transferred. In a transfer paper peeling device of a transfer type printing device that peels off a recording medium, the plurality of pulleys have an axis perpendicular to the axis of the transfer roller and are spaced apart from each other on both sides of the transfer roller. first and fourth pulleys, and second pulleys disposed between the first and fourth pulleys, having an axis parallel to the axis of the transfer roller, and disposed on both sides of the transfer roller with the transfer roller in between. 2. Consisting of a third pulley, seventh and fifth pulleys coaxial with the second and third pulleys, respectively, and a sixth pulley coaxial with the transfer roller, the endless peeling belt is , the second pulley, the transfer roller, and the third, fourth, fifth, sixth, and seventh pulleys in this order, and when the transfer roller is separated from the recording medium, the endless belt is It is rotatably held only by the transfer roller and the plurality of pulleys without contacting the recording medium, and when the transfer roller is pressed against the recording medium, the recording medium, the transfer roller, and the endless peeling belt is arranged to transfer the developed image on the recording medium to a recording paper and peel the recording paper from the recording medium, and the endless peeling belt is pressed together with the recording paper against the recording medium by the transfer roller. A transfer type printing device characterized in that it is configured to rotate in synchronization with the recording medium to transfer a developed image on the recording medium to a recording paper, and to peel the recording paper from the recording medium. Paper peeling device.