JPH0670364U - Fax machine - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] The present invention relates to a facsimile apparatus, which prevents the occurrence of a jam by feeding the recording paper back into the recording paper case when the recording paper is back-fed. A feed roller 18 that contacts the delivery edge 6 of a recording paper case 5 with the recording paper 4 interposed therebetween, the feed roller is interlockingly connected to a platen roller 11, and rotates at least in the same direction as the platen roller during backfeed. It is configured to include a gear train that allows

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a facsimile machine, for example, to a facsimile machine that transmits or receives a text or the like using a telephone line or the like, and more particularly to a facsimile machine with improved feeding of recording paper.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, as a facsimile apparatus of this type, as shown in FIG. 4, for example, a roll-shaped thermosensitive recording paper 34 is provided in a cabinet 33 composed of a bottom cabinet 31 and a top cabinet 32 at a substantially central portion thereof. A recording paper case 35, a platen roller 40 for interlockingly connecting a forward and reverse rotatable motor 36 and a gear train 37, and feeding the recording paper 34 to a thermal print head 38 while pressing it from an outlet 39. The paper guide 41 is provided between the recording paper case 35 and the platen roller 40 and is attached to the upper edge of the delivery port 39 for removing the curling of the recording paper 34, and the recording paper 34 is manually cut. In order to reduce the loss of the printing portion of the recording paper 34, the front end of the cut recording paper is fed back to the print head 38. ) Which was constructed is known to.

[0003]

[Problems to be solved by the device]

 However, in such a conventional facsimile apparatus, there is a problem that a so-called jam occurs that the recording paper is jammed between the platen roller and the paper guide when the recording paper is back-fed. The present invention has been made in view of such a conventional problem, and a feed roller for feeding the recording paper back to the recording paper case is provided near the feeding edge of the recording paper case when the recording paper is back-fed. It is an object of the present invention to provide a fax machine which can prevent the occurrence of jams by being provided in the.

[0004]

A facsimile device of the present invention has a recording paper case for accommodating a roll of recording paper, and a platen roller for sending the recording paper from a delivery port while pressing it against the print head. In a facsimile apparatus configured to feed back the leading edge of the recording paper to the print head after cutting the recording paper on which printing has been performed, a feed roller that contacts the delivery edge of the recording paper case with the recording paper interposed, and at least a feed roller. A gear train for rotating the feed roller in the same direction as the platen roller during back feed is provided.

[0005]

[Action]

 In the facsimile apparatus of the present invention, the feed roller that contacts the feed edge of the recording paper case is interlocked so as to rotate in the same direction as the platen roller. The feed roller also reverses with time, and the rotation of the feed roller causes the recording paper to be fed back to the recording paper case. The gear train may be connected to the feed roller only during back feed, or may be always connected to the feed roller.

[0006]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a first embodiment of a facsimile apparatus of the present invention. First, the configuration will be described. In FIG. 1, reference numeral 100 denotes a facsimile machine, and the facsimile machine 100 has a cabinet 1 composed of a bottom cabinet 2 and a top cabinet 3. A recording paper case 5 that rotatably accommodates a roll-shaped thermosensitive recording paper 4 is provided in a substantially central portion of the cabinet 1, and one side (the right side in FIG. 1) of the recording paper case is provided. A delivery edge 6 for guiding the delivery of 4 is integrally provided. On the other hand, a control panel 7 is provided above the recording paper case 5 in the cabinet 1 so as to be openable and closable, and a thermal print head 8 for printing on the recording paper 4 is provided at the bottom of the control panel 7 with a head spring. It is attached by urging downward by 9. Below the print head 8, a platen roller 11 for sending the recording paper 4 to the print head 8 while pressing the print paper 4 against the print head 8 from a delivery port 10 formed between the top cabinet 3 and the control panel 7 is provided inside the cabinet 1. The control panel 7 located above the delivery port 10 is provided with a cutting edge 12 for manually cutting the recording paper 9. The platen roller gear 13 attached to the platen roller 11 is interlocked with a drive gear 15 of a motor 14 capable of rotating in the forward and reverse directions through a platen roller gear train 16.

Further, a paper guide 17 for curling the recording paper 4 is attached to the lower part of the control panel 7 so as to be located between the recording paper case 5 and the platen roller 11, and the recording paper 4 is recorded. A feed roller 18 is attached to the feed edge 6 of the paper case 5 and comes into contact with the recording paper 5 in between. The feed roller gear 19 attached to the feed roller 18 is interlocked with the platen roller gear 13 via a feed roller gear train 20 that rotates in the same direction as the platen roller 11 only when the recording paper 4 is back-fed. The feed roller gear train 20 is constantly meshed with a first gear 21 that is constantly meshed with the platen roller gear 13, and is also meshed with the first gear 21 via a coupling plate 22. In addition, it is composed of a second gear 23 that is swingably provided within a required range around the first gear 21, and the second gear 23 is driven by the rotational force of the platen roller gear 13 when the recording paper 4 is back-fed. The roller gear 19 is lifted and meshes with the feed roller gear 19.

Next, the operation will be described. In the facsimile apparatus having the above structure, the driving force of the motor 14 is transmitted to the platen roller 11 via the platen roller gear train 16, the platen roller 11 is rotated clockwise in FIG. Is printed by the printer and sent from the outlet 10. When the recording paper 4 is manually cut off using the cutting edge 12 after receiving and printing, the motor 14 rotates in the reverse direction to rotate the platen roller 11 in the counterclockwise direction in FIG. The feed roller 18 is rotated in the same direction as the platen roller 11 via the gear train 20. For this reason, the recording paper 4 is reversely fed into the recording paper case 5 as shown by the recording paper 4A in accordance with the reverse rotation of the feed roller 18, and the leading end of the recording paper reaches the print head 8 and is stopped. Therefore, the jam of the recording paper 4 does not occur between the platen roller 11 and the paper guide 17, and printing is performed from the leading end of the recording paper at the next reception.

FIG. 3 is a diagram showing a second embodiment of the facsimile apparatus of the present invention, and the same components as those in the first embodiment are designated by the same reference numerals. This facsimile apparatus 200 has a feed roller 28 in which a feed roller 28 directly meshes with a required gear of a platen roller gear train 20 of the first embodiment or a platen roller gear train 24 different from the gear roller 28 through a one-way clutch to rotate. This is the case where the roller gear 29 is connected to the roller gear 29. As shown in FIG. 3, the feed roller 28 is driven by the recording paper 4 to idle when the recording paper 4 is sequentially fed, and a one-way clutch is used when the motor 14 reversely rotates to reverse the platen roller 11. In FIG. 3, the recording paper 4 is reversely rotated in the clockwise direction and is fed back into the recording paper case 5.

In this embodiment, the feed roller gear 29 for rotating the feed roller 28 is directly rotated and driven in the reverse feed direction by the platen roller gear trains 20, 24 via the one-way clutch. As in the case of the first embodiment, the feed roller gear train 20 is not required and the gear mounting space is not required, so that the space can be saved greatly and the gear structure can be greatly simplified.

[0011]

[Effect of device]

 As described above, according to the facsimile apparatus of the present invention, when the recording paper is back-fed, the recording paper is fed back into the recording case, so that there is no jam between the paper guide and the platen roller as in the conventional case. It can be prevented from occurring.

[Brief description of drawings]

FIG. 1 is a side sectional view of a first embodiment of a facsimile apparatus of the present invention.

FIG. 2 is a side sectional view showing a state in which the recording paper of the embodiment shown in FIG.

FIG. 3 is a side sectional view of a second embodiment of the facsimile apparatus of the present invention.

FIG. 4 is a side sectional view of a conventional facsimile apparatus.

[Explanation of symbols]

 4 Recording Paper 5 Recording Paper Case 6 Delivery Edge 8 Print Head 10 Delivery Port 11 Platen Roller 12 Cut Edge 17 Paper Guide 18 Feed Roller 20 Feed Roller Gear Train 16, 24 Platen Roller Gear Train 100, 200 Facsimile Machine

Claims (1)

[Scope of utility model registration request] 1. A recording paper case for accommodating a roll of recording paper, and a platen roller for feeding the recording paper from a delivery port while pressing it against the print head, and recording after cutting the printed recording paper. In a facsimile apparatus configured to feed back the front end of the paper to the print head, a feed roller that contacts the delivery edge of the recording paper case with the recording paper interposed, and at least the feed roller is the same as a platen roller during backfeed. And a gear train that rotates in a direction.