JPS63231966A - Ink donor film catridge - Google Patents

Abstract

PURPOSE:To prevent transfer information of a used ink donor film wound on a winding roll from being read, by providing a reverse prevention mechanism to a winding roll axis. CONSTITUTION:A winding roll 12 is driven in an arrow 24 direction by a follower gear fixed to an end part of a winding roll axis 15. A reverse prevention mechanism 25 composed of a ratchet wheel 26 and a ratchet spring 27 wound on the winding roll 14, of which a base part is deterred with a side plate 3 and of which a free end 27a engages in a gear tooth of the ratchet wheel 26, is provided to the other side winding roll axis 14. Though allowed to rotate in the arrow 24 direction with the reverse prevention mechanism 25, the winding roll axis 14 is prevented from rotating in the reverse direction. Thereby, a used ink donor film 8 wound on the winding roll 12 is prevented from being pulled out.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention provides a means for preventing the reading of transferred information on a used ink donor film in a roll-type ink donor film stored in a cartridge. An ink donor film cartridge comprising:

``Prior Art'' In recording devices such as facsimile machines, a thermal head that is in contact with an ink donor film in a state where the recording paper and ink donor film are superimposed is heated in response to an image signal, so that the recording paper forming an image.

The ink donor film is supplied from a supply roll and wound onto a take-up roll. The above supply roll and take-up roll are placed in advance in the cartridge 1. There has been provided a type of recording apparatus in which the ink donor film is stored in a cartridge, and when the ink donor film runs out, the cartridge itself is replaced in the main body of the machine to replenish the ink donor film.

``Problems to be Solved by the Invention'' Since the conventional ink donor film described above could be easily taken out of the machine body along with the cartridge, confidential information could be decoded by reading the image transfer part of the ink donor film. There is a problem. To prevent this, a device has been developed in which a pick mechanism is installed inside the machine body so that the cartridge can be locked to the main body, but even when the cartridge is locked to the main body, the take-up roll can still be reversed. Therefore, there is a problem in that the used ink donor film can be pulled out from inside the cartridge and the information left on the used ink donor film can be read.

SUMMARY OF THE INVENTION An object of the present invention is to provide an ink donor film cartridge that prevents used ink donor film from being pulled out of the cartridge and prevents reading of transferred information on the ink donor film.

``Means for resolving the problem clearly'' In the ink donor film cartridge of the present invention, which has a take-up roll and a supply roll for the ink donor film, the take-up roll axis is prevented from reversing. It is characterized by the provision of a mechanism to do so.

“Example J Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows a perspective view of an ink donor film cartridge of the present invention. The cartridge 1 is removably installed in the main body (not shown) of a recording device such as a facsimile, and its upper part is covered by a cover that can be opened and closed. The frame 2 of the cartridge 1 shown in FIG. 1 consists of left and right side plates 3.4 and a bottom plate integrally connecting the lower parts of the side plates 3.4.

A bearing part 5 consisting of a notched hole opening inward is formed at the front part of the side plate 3.4, and a bearing part 6 consisting of a notched hole opening inwardly is formed at the rear part. ing. As shown in FIG. 2, the supply roll 7 consists of a core 9 around which an ink donor film 8 is wound, and a pair of shafts 11 that are detachably inserted into both ends of the core 9. There is. The axis 11 of this supply roll 7 is the axis x of the frame 2
It is removably installed inside the i6.

The other winding roll 12 includes a winding core 13 around which the ink donor film 8 is wound, and winding roll shafts 14 and 15 that are detachably inserted into both ends of the winding core 13, respectively. Both winding roll shafts 14.1 of this winding roll 12
5 is detachably mounted within the bearing portion 5 of the frame 2.

In FIG. 1, operating members 18, 19 of a locking device that can be opened and closed in the directions of arrows 16, 17 are arranged in the recording device, and the locking pin 21 of each operating member 18, 19 is connected to the cartridge 1. The cartridge 1 can be locked within the recording apparatus by engaging with the engagement holes 22 formed in the front part.

In FIG. 2, a driven gear 23 fixed to the end of the take-up roll shaft 15 is driven by a drive source (not shown) and drives the take-up roll 12 in the direction of an arrow 24. The other take-up roll shaft 14 is provided with a first reverse rotation prevention mechanism 25 consisting of a ratchet mechanism, as shown in FIG. This reversal prevention mechanism 25 includes a ratchet wheel 26 fixed to the take-up roll shaft 14 and a ratchet wheel 26 fixed to the take-up roll shaft 14.
The ratchet spring 27 is wound around the base of the ratchet spring 27, and its base is locked to the side plate 3, and its free end 27a is engaged with the teeth of the ratchet wheel 25.

The reverse rotation prevention mechanism 24 allows the take-up roll shaft 14 to rotate in the winding direction of the ink donor film 8 (the forward direction of the arrow 24), but acts to prevent rotation in the opposite direction. The used ink donor film 8 wound around the take-up roll 12 can be pulled out from the take-up roll 12 by providing the take-up roll shaft 14 with a reversal prevention mechanism 25 consisting of a ratchet mechanism configured as described above. This has been prevented. Note that the free end 27 of the ratchet spring 27
If a tube made of hard rubber or the like is fitted to H, the sound generated when the free end 27a of the ratchet spring 27 jumps over the teeth of the ratchet wheel 26 can be reduced when the ratchet wheel 26 rotates in the forward direction. Can be done.

FIG. 5 shows a second reversal prevention mechanism 28 that prevents the take-up roll shaft 14 from reversing. This reversal prevention mechanism 28 is
The base is locked to the side plate 3 and the take-up roll shaft 14
The clutch spring is wound with an appropriate number of turns around the clutch spring. When the take-up roll shaft 14 is rotating in the forward direction of the arrow 24, the clutch spring of the reversal prevention mechanism 28 is in a relaxed state, and the ink donor film 8 on the take-up roll 12 is normally taken up. be exposed. However, when the take-up roll shaft 14 attempts to rotate in the opposite direction to the arrow 24, the clutch spring of the reverse rotation prevention mechanism 28 becomes tight and stops the rotation of the take-up roll shaft 14. That is, the ink donor film 8 is prevented from being pulled out from the take-up roll 12.

FIG. 6 shows the third winding roll shaft 15 that prevents the other take-up roll shaft 15 from reversing.
The reverse rotation prevention mechanism 29 is shown. In FIG. 6, an intermediate gear 31 meshing with the driven gear 23 of the winding roll shaft 15 is attached to the side plate 4 of the frame 2 by a shaft 33 via a one-way clutch 32. As shown in FIG. The intermediate gear 31 is
It is connected to a drive source (not shown) and drives the intermediate gear 31 and the take-up roll shaft 15 in the forward direction of the arrow 24.

A one-way rotating latch forming the reverse rotation prevention mechanism 29,
When the take-up roll shaft 15 and take-up roll 12 are rotated in the direction of arrow 24, the intermediate gear 31 is allowed to rotate, but when the take-up roll shaft 15 and take-up roll 12 try to rotate in the direction opposite to arrow 24, the intermediate gear 31 is rotated. The gear 310 rotation is prevented. This prevents the used ink donor film 8 wound around the take-up roll 12 from being pulled out from the take-up roll 12.

The winding roll 12 that winds up the used ink donor film 8 in this way is rotated by one of the reversal prevention mechanisms 25 mentioned above.
．． By preventing reversal using 28 and 29, it is possible to prevent the used ink donor film 8 wound on the take-up roll 12 from being pulled out from the take-up roll 12, thereby preventing information leakage in the recording device. can do.

In this example, the ink donor film cartridge was provided with a mechanism to prevent the winding shaft from reversing to prevent leakage of security information. The one-way clutch of the present invention can also be introduced into the vehicle.

However, even if this mechanism is provided on the device side, the lock may be broken (
If the cartridge is removed from the device (or the cartridge is locked), the ink donor film can be easily loosened and the information may be read.
By providing a reversal prevention mechanism for the winding shaft on the ink donor film cartridge side as in the present invention, reading of transferred information on the ink donor film can be reliably prevented.

"Effects of the Invention" As explained above, according to the present invention, in a cartridge that is lockably housed in the main body of a recording device, a reversal prevention mechanism is provided on the take-up roll shaft of the take-up roll of the cartridge. It is possible to reliably prevent the transfer information from being read on the used ink donor film wound around the take-up roll.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a cartridge to which an embodiment of the present invention is applied, Fig. 2 is a perspective view of a mechanism for preventing reading of transferred information on an ink donor film, showing an embodiment of the present invention, and Fig. 3 is the same. 4 is a sectional view taken along line A-A in FIG. 3, FIG. 5 is a side view showing a second embodiment of the reverse rotation prevention mechanism, and FIG. 6 is a third embodiment of the reverse rotation prevention mechanism. FIG. 1... Cartridge, 2... Frame, 7... Supply roll, 12... Winding roll, 14.15... Winding up Roll axis, 25, 2
8, 29... Mechanism to prevent reverse rotation of the take-up roll shaft. Applicant: Fuji Xerox Co., Ltd. Agent

Claims (1)

Claims: 1. An ink donor film cartridge having an ink donor film take-up roll and a supply roll, characterized in that the take-up roll is provided with means for preventing reverse rotation of the take-up roll on the take-up roll shaft side. 2. The reverse rotation prevention means consists of a ratchet wheel fixed to the take-up roll shaft, and a ratchet spring whose one end is fixed, the other end engages with the ratchet wheel, and is wound around the take-up roll shaft. Characteristic claim 1
Ink donor film cartridge as described in Section. 3. A patent characterized in that the reversal prevention means is a coil spring with one end fixed, and a clutch spring wound around the take-up roll shaft so that it can be tightened when the take-up roll shaft is reversed. An ink donor film cartridge according to claim 1. 4. The reversal prevention means is a one-way rotation clutch arranged between an intermediate gear disposed between the take-up roll shaft and its driving source, and a shaft of the intermediate gear fixed to this intermediate gear. An ink donor film cartridge according to claim 1, characterized in that: