JPH0373745A - Facsimile device equipped with preventing mechanism for jam due to curl of recording paper - Google Patents

Abstract

PURPOSE:To prevent the generation of curl by forming the streak cuts such as linear streak cuts and strip shaped cuts in the same direction to a recording paper onto the discharged recording paper by forming an unevenness which can be freely fitted, keeping the recording paper interposed, onto the opposed surfaces of the upper and lower guides and continuously providing the bending rigidity in the passing direction onto the passing recording paper. CONSTITUTION:A recording paper 5a having the received information printed is sent to a cutter unit G side, passing through a guide G by the counterclockwise revolution of a platen 16. At this time, on the guide G, streak cuts 25 and 25 for generating the bending rigidity in the passing direction are firmed, nipped by a reform tip 20 installed onto an upper guide 18 and the recessed part 24 on a lower guide 19. The recording paper 5a is provided with the bending rigidity in the passing direction by the streak cuts 25 and 25, and paper is discharged free from curl.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a facsimile machine having a jam prevention mechanism due to curling of recording paper, and in particular, to a facsimile machine having a mechanism for preventing jams caused by curling of recording paper. The present invention relates to a facsimile machine having a mechanism for preventing jams caused by curling of recording paper by providing unevenness on opposing surfaces of the recording paper and applying streak marks or band-like marks to the recording paper to prevent jams caused by curling.

[Background of the Invention] Rolled thermal recording paper is widely used in facsimile machines.

This heat-sensitive recording paper is coated with a white or transparent coloring agent in which leuco dye and phenol compound are dispersed in a binder so that they do not come into contact with each other, and the binder in the coloring agent is removed by contact heating with a thermal head. When melted, the leuco dye and phenol compound come into contact and a chemical reaction occurs, resulting in a black color.

The recording paper mentioned above has a coloring agent coated on one side and is in roll form, so when it is unrolled and printed, it inevitably curls, and this tendency becomes more noticeable as it approaches the original volume. . Additionally, this curling may cause the paper to jam at the paper ejection port.

As one of the means to prevent such curls, the 10th
As shown in the figure, an upper guide 18 is provided to guide the recording paper 5 from the recording paper storage chamber 14 toward the line thermal head 15 and platen 16 side for printing, and the terminal end of the upper guide 18 is raised at a substantially right angle, and the corner The curling was corrected by squeezing the recording paper 5.

As another means, as shown in FIG. 11, a pair of reverse curling rollers 31 and 32 are rotatably provided in front of the platen 16, and curling is performed by passing through the reverse curling rollers 31 and 32. was being corrected.

C Problems to be Solved by the Invention H] As in the above-mentioned conventional example, a large driving torque is required to correctively squeeze or reverse curl in the opposite direction to curling. This has led to problems such as increased power of the drive motor, increased power consumption, and increased weight and size of the device.

In addition, since curling is corrected before printing,
It was not effective against curling caused by printing.

This idea was developed in view of the above points, and it does not require a particularly large drive torque, and allows the printed recording paper to be fed to the cutter unit, cut smoothly, and then continuously fed onto the paper output tray. purpose.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a facsimile machine equipped with upper and lower guides for guiding printed recording paper to a cutter unit, in which the upper and lower guides are opposite to each other. It is characterized by providing unevenness on the surface with a shape that allows the recording paper to be loosely fitted therebetween, and continuously imparting bending rigidity in the passing direction to the passing recording paper.

[Operation] The recording paper 5a on which the received information is printed passes through the guide G and is sent to the cutter unit 11N as the platen 16 rotates counterclockwise as shown in FIG.

At this time, in the guide G, as shown in FIG. 1, FIG. 4, and FIG. Streaks 25.25, which provide directional bending stiffness, are formed as shown in FIG.

The streaks 25, 25 impart bending rigidity to the recording paper 5a in the passing direction, and the recording paper 5a is ejected without curling as shown in FIG.

Therefore, even if the sheets are continuously discharged, the sheets are stacked on the sheet discharge tray 26 without falling off from the sheet discharge tray 26.

[Embodiments] Next, four embodiments of a facsimile apparatus having a jam prevention mechanism due to curling of recording paper according to the present invention will be described in detail with reference to FIG. 1 and subsequent figures.

The facsimile machine F shown in FIG. 2 is suitable for incorporating the curl jam prevention mechanism according to the present invention.

In FIG. 2 above, the facsimile device F includes a transmitting means 4 that uses an optical reading unit 3 to read images of original documents 2 that are conveyed separately one by one, in an outer case 1 that has a substantially rectangular parallelepiped shape. , a receiving means 6 for recording received image information on recording paper 5 unrolled from a roll.

As shown in FIG. 2, the transmitting means 4 includes a document stacker 7 hooked to the upper part of the upper surface of the outer case 1, a separation batt unit 8 that separates bi-leaf documents 2 one by one, and an optical device that separates the separated documents 2. A self-supplied roller 9 that feeds the document 2 to the system, a pressure roller 10 and a feeding roller 1 that are arranged opposite to each other across the surface on which the document 2 moves.
1 and an optical reading unit 3 installed below the self-feeding roller 9. The device separates the bi-leaf originals 2 stacked on the original stacker 7 one by one and reads the images by the optical reading unit 3. , and sends the paper out to the paper discharge port 12.

The image signal read by the optical reading unit 3 is transmitted to the other party using a communication line, as is well known.

13 is an operation panel, which is attached to the outer case 1 as shown in FIG.
is placed on the top surface of.

The receiving means 6 includes a recording paper storage chamber 14 that feeds out and freely stores a roll of recording paper 6, and a line thermal head that records the transmitted image information onto the recording paper 5 that is fed out from the recording paper storage chamber 14. 15 and platen 16, a guide G that guides the recording paper 5a on which received information is printed to a cutter unit 17, and a cutter unit 17 that cuts the recording paper 5 to a predetermined length. Image information is printed on recording paper 5 and cut to a predetermined length.

In front of the line thermal head 15 and platen 16 that record image information, there is an upper guide 1 as shown in FIG.
A guide G consisting of a lower guide 8 and a lower guide 19 is provided.

The upper guide 18 and the lower kite 19 are provided with a mechanism for imparting bending rigidity to the printed recording paper 5a to prevent curling.

To explain in more detail, the upper guide 18 is a short piece of cross-sectional shape [8&] attached to the front of the line thermal head 15 as shown in FIG.
A reform chip 20 as shown in FIG. 3 is attached to the lower surface extending in the direction of travel of the recording paper 5a with screws 21 and 21 in a form that tapers in the direction of travel of the recording paper 5a.

The reform chip 20 is made of a material with high wear resistance and a smooth surface, such as hard rubber or Delrin (trade name), and has a tapered shape with a substantially semicircular cross section as shown in FIG. As the printed recording paper 5a advances, large vertical groove-like streaks 25 are formed on the recording paper 5a. In addition, this reform chip 20 has holes 20a, 20a for screw fixing, as shown in FIG. has been done.

In contrast to the upper guide 18 described above, the lower guide F 19 has a piece 19a having a cross-sectional shape fixed to the upright portion of the fixing plate 23, as shown in FIG. A recess 24 is formed in the upper guide plate 18 at a position corresponding to the glue form chip 20.

Reform chip 20 of upper guide 18 and lower guide 19
As shown in FIG. 5, between the recesses 24, there is a gap 1. in which the printed recording paper 5a advances without experiencing great resistance.
As shown in FIG. 6, streaks 25 having a semicircular cross section are formed on the recording paper 5a that has passed through the recording paper 5a.

In the curling prevention mechanism of the facsimile machine having the above configuration, the recording paper 5a on which received information is printed passes through the guide G as the platen 16 rotates counterclockwise as shown in FIG. Sent.

At this time, in the guide G, the reform chip 20.20 (only one shown) attached to the upper guide part 8 in a centered manner is held between the recess 24.24 (only one shown) of the lower guide, and is bent in the passing direction. Muscle origin 25 that becomes rigid
．． 25 is formed as shown in FIG.

The streaks 25 and 26 impart bending rigidity to the recording paper 5& in the passing direction, and the paper is ejected without curling as shown in FIG.

Therefore, even if the sheets are continuously discharged, the sheets are stacked on the sheet discharge tray 26 without falling off from the sheet discharge tray 26.

FIG. 7 is an enlarged cross-sectional view showing a second embodiment of the present invention, in which the reform chip 20 is shown as in the first embodiment.
Instead of making the upper guide as a separate member, the reforming chip 20 is integrally formed by extrusion molding the upper guide. It is desirable that the lower surface of the upper guide 18 be treated with Teflon (not shown) or the like in order to reduce resistance to passage of the recording paper 5a and increase wear resistance.

The lower guide 9 with respect to the upper guide 18 is the same type as the first embodiment, and is a gap t through which the recording paper 5a passes without much resistance as in the first embodiment.

t is formed between the recording paper 5a and the recording paper 5a, as shown in FIG.

FIG. 8 is a sectional view showing a third embodiment of the present invention, in which the upper guide 18 is provided with a hole 18b into which the reform chip 20 is fitted, and the lower surface of the reform chip 20 is provided with a flange 2Ob for attachment. are fitted and fixed.

The renovation chip 20 of this third implementation example is also the first implementation example.
Like dirt 11, it is molded from hard rubber, Delrin (trade name), etc.

In addition, similarly to the first and second implementation examples, the passing recording paper 5
Gap for a to advance without significant resistance 1. 1 is,
As shown in FIG. 8, each is formed between the recording paper 5a and the recording paper 5a.

FIG. 9 is a partially cutaway perspective view showing a fourth embodiment of the present invention, in which a notch 24a is cut out in place of the recess 24 of the lower guide 19 in the first to third embodiments. be.

Although the four embodiments have been described above with reference to the drawings, the curl jam prevention mechanism of the present invention is not limited to this.
As long as the intended purpose is achieved by providing the unevenness in which the unevenness is formed, the shape and form are not critical.

[Effects of the Invention] As described above, the facsimile machine having the jam prevention mechanism due to recording paper curl according to the present invention has unevenness on the opposing surfaces of the upper and lower guides that guide the printed recording paper to the cutter unit. By applying streaks such as streaks or strip marks in the same direction as the recording paper to the discharged recording paper, curling can be prevented, and jams caused by curling can also be prevented. Therefore, even if the sheets are continuously discharged from the paper discharge port, they are stacked on the paper discharge tray without falling off the paper discharge tray.

[Brief explanation of drawings]

1 is a perspective view showing an example of a facsimile machine having a jam prevention mechanism due to recording paper curl according to the present invention; FIG. 2 is a schematic sectional view of the facsimile machine F;
The figure is an enlarged perspective view showing an example of a reformed chip, FIG. 4 is an enlarged cross-sectional view of a state in which recording paper is sandwiched, FIG. The figure is a perspective view of the discharged recording paper, FIG. 7 is an enlarged sectional view of the second embodiment, FIG. 8 is an enlarged sectional view of the third embodiment, and FIG. 9 is an enlarged sectional view of the fourth embodiment.
FIG. 10 is a partially cutaway perspective view of the example, FIG. 10 is a schematic cross-sectional view of the conventional example, and FIG. 11 is a schematic cross-sectional view of the second conventional example. F ◆ G ・ 5 ・ 15 ・ l 6 ・ 18 ・ ! 9 ◆ 20 ◆ 24 ・ 24a Conflict 25 ・ ・Facsimile device・Guide・Recording paper・Line thermal spatula・Platen・Upper guide ◆Lower guide・Renovation chip・Dent・Notch・Stripe dot 1Q: 7 Guide Figure 1

Claims (1)

[Claims] (1) In a facsimile machine equipped with upper and lower guides that guide printed recording paper to a cutter unit, the opposing surfaces of the upper and lower guides are provided with irregularities shaped so that the recording paper can be inserted loosely therethrough. A facsimile machine having a jam prevention mechanism due to curling of recording paper, characterized in that the recording paper is continuously given bending rigidity in the passing direction.