JPH0386572A - Recorder - Google Patents

Abstract

PURPOSE:To prevent the jam of fanfold paper to ensure a stable paper feeding under any environment by mounting guide means forming a feed path for guiding a sheet material to be fed to a recording means while preventing the sheet material from abutting on a feed roller. CONSTITUTION:Fanfold paper fed by a pin feed tractor 14 is carried in a U-turn path A between an upper guide 12 and a lower guide 13 along the upper guide 12. The paper is depressed on a platen 4 by a presser plate 10 and applied with recording by a recording head 1 in accordance with image information, thereafter being delivered outside a device by a discharge roller 15. The fanfold paper between the upper guide 12 and the lower guide 13 is not directly abutted on a feed roller 5 but wound around the U-turn path A, thus not being affected by the feed force of the feed roller 5 at all. In this manner, there is no possibility that a difference in feed speed between the pin feed tractor 14 and the feed roller 5 may cause the break of the paper and the occurrence of jamming.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a recording apparatus having a conveying means for conveying sheet material, particularly continuous paper.

<Prior Art> Conventionally, a recording device having a pin feed tractor has been used as an output device for personal computers, word processors, and the like.

As shown in FIG. 4, the above-mentioned recording apparatus is provided with a feed roller 50 and pinch rollers 51a and 51b that press against the feed roller 50 and rotate as a result of rotation as means for conveying the sheet material, and the sheet material is wound around the feed roller 50 and conveyed. A so-called U-turn path A is provided.

For example, when cut paper is used as the sheet material, the cut paper is pinched between the feed roller 50 and the pinch roller 51a and conveyed by the frictional force generated between them.

On the other hand, in the case of continuous paper (hereinafter referred to as "fan hold paper J") as the sheet material, a pin 52a provided on the pin feed tractor 52 is engaged with a pin hole in the fan hold paper, and the feed roller 50 and It is conveyed to the recording section by the frictional force generated between the pinch roller 51b and the pinch roller 51b.At this time, even if the conveyance amount of the pin feed tractor 52 and the feed roller 50 is the same, Since a difference in conveying speed occurs due to the dimensional accuracy of the two, the pressing state of the pinch rollers 51a and 51b that press the feed roller 50 is released so that the conveying force by the feed roller 50 is not applied to the fan hold paper. .

After the conveyed sheet material is subjected to recording according to the image information by the recording head 53, it is pulled up and discharged by the discharge roller 54 and the pinch roller 55 that presses it.

<Problems to be Solved by the Invention> However, in the above-mentioned conventional technology, even when conveying the fan-hold paper, the paper is wrapped around the feed roller 50 and conveyed, so the pressure of the pinch rollers 51a and 51b is released. Even if the conveying force is not completely lost, there is a risk that a paper jam may occur due to the difference in conveying speed between the bin feed tractor 52 and the feed roller 50.

For example, when the feed roller 50 carries a larger amount than the bin feed tractor 52, more tension is applied to the fan hold paper between the tractor 52 and the feed roller 5o than necessary, which may cause damage and jam. .

In addition, the bin feed tractor 5
If the conveyance amount of 2 is large, the fan-hold paper may become loose between the tractor 52 and the feed roller 50, and the fan-hold paper may come off from the bin 52a of the tractor 52, causing a jam.

In order to solve this problem, it is conceivable to make the surface of the feed roller 50 smooth, but when conveying cut paper, the feed roller 5o and the pinch roller 50
There is a risk that the conveying force between the two parts a and 51b will decrease, resulting in poor conveyance.

If it is attempted to maintain the conveying force by increasing the pressing force of the pinch rollers 51a and 51b, the feed roller 50. The rigidity of the pinch rollers 51a, 51b and the chassis supporting them must be improved, which tends to increase costs.

In addition, since the feed roller 50 is made of a material with a relatively high coefficient of friction such as rubber, the sliding condition of the surface changes due to changes in the environment, and especially in hot and humid conditions, the coefficient of friction increases significantly and jams. There is a risk that this may occur.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a recording apparatus that is provided with a guide member that forms a conveyance path for conveying fan-hold paper without contacting the feed roller.

Means for Solving the Problems> Typical means for solving the problems of the prior art described above and applied to the embodiments described below include a conveyance means having a conveyance roller for conveying the sheet material, and a conveyance means having a conveyance roller for conveying the sheet material, and image information. The apparatus is characterized by comprising a recording means for recording on the sheet material according to the recording means, and a guide means for forming a conveyance path for guiding the sheet material conveyed to the recording means so as not to contact the conveyance roller. shall be.

According to the above means, since the guide means is provided to form a conveyance path for guiding the sheet material conveyed to the recording means so as not to contact the conveyance roller, it is possible to use fan-hold paper as the sheet material. In this case, the conveyance force by the conveyance roller is not applied to the fan-hold paper.

Therefore, stable conveyance can be performed without jamming the fan hold paper under any environment.

Further, when a plurality of conveyance paths are provided as the guide means depending on the type of sheet material, the cut paper or fan-hold paper can be conveyed from the same direction, thereby improving operability.

<Embodiment> An embodiment of a recording apparatus to which the present invention is applied will be described below with reference to the drawings.

FIG. 1 is an explanatory cross-sectional view of the recording apparatus, and FIG. 2 is an explanatory view when conveying fan-hold paper.

First, a schematic configuration of a recording apparatus to which the present invention is applied will be explained with reference to FIG.

Reference numeral 1 denotes a recording head which is a recording means for recording on a sheet material S such as cut paper or fan-hold paper according to image information. Although various types of recording head 1 can be used as the recording head 1, an inkjet type recording head is used in this embodiment.

That is, it is constructed by integrating a head chip having an ink ejection opening and an ejection energy generating element provided corresponding thereto, and an ink cartridge serving as an ink supply source.

The recording head l is mounted on the carriage 2,
This carriage 2 can slide on a guide shaft 3.

A carriage motor (not shown) is provided at one end of the sliding range of the carriage 2, and by rotating this motor in forward and reverse directions, driving force is transmitted to the carriage 2 via the timing belt and moved on the guide shaft 3. It runs back and forth.

Further, a sheet material S is provided at a position facing the recording head 1.
A platen 4 having a flat surface for supporting the guide shaft 3 is provided parallel to the guide shaft 3.

A sheet material S is provided below the recording head 1 and platen 4.
A feed roller 5, which is a conveyance roller for conveying the paper, is provided parallel to the guide shaft 3. The surface of the feed roller 5 is made of a high friction member such as rubber. Pinch rollers 6a and 6b are provided around the feed roller 5, respectively, to press against the feed roller 5 and rotate as a result of the feed roller 5 along each conveyance path of the sheet material S. That is, the pinch rollers 6a are provided along the fan-hold paper conveyance path, and the pinch rollers 6b are provided along the cut paper conveyance path. Therefore, by driving and rotating the feed roller 5 by a drive means (not shown), each sheet material S is pinched and conveyed between the feed roller 5 and the pinch roller 6a or 6b. .

The pinch rollers 6a and 6b are rotatably supported by pinch roller arms 7a and 7b, respectively.
a and 7b are biased by compression springs 8a and 8b, respectively, to constantly press the pinch rollers 6a and 6b against the feed roller 5.

In addition, D-cut release shafts 9a and 9b are provided near the pinch roller arms 7a and 7b, respectively, and by rotating them in the direction of the arrow in the figure, the feed rollers 5 of the pinch rollers 6a and 6b can be The structure is such that the pressure on the button can be released.

On the downstream side of the recording pad 1 in the sheet material conveying direction (hereinafter simply referred to as "downstream side J"), a width larger than the maximum width of the sheet material S is provided to prevent the sheet material S from floating up from the platen 4. A pressing plate 10 is provided, which has a pressing plate 10. The pressing plate IO is biased by a compression spring 11 and presses the sheet material S onto the platen 4 along the width direction.

Reference numeral 12 denotes an upper guide constituting a guide means for winding and guiding the fan-hold paper conveyed to the recording head 1 so as not to contact the feed roller 5, and 13 is provided opposite to the upper guide 12. Together with this, it is a lower guide that constitutes each conveyance path of the sheet material S.

The upper guide 12 is used when the fan-hold paper transported by the feed roller 5 and the pinch roller 6a is transported through the U-turn portion (hereinafter referred to as "U-turn path A") of the transport path formed by the upper and lower guides. This fan-hold paper is guided so that it does not come into contact with the feed roller 5 and get wrapped around it. After passing the U-turn path A, the sheet is again conveyed to the recording means by the feed roller 5 and the pinch roller 6b.

14 is a pin feed tractor, which connects the pin hole of the fan hold paper to the pin 14 of the pin feed tractor 14.
a, the feed roller 5 and the pinch roller 6 are engaged with each other.
The fan-hold paper is sequentially conveyed between the paper and the paper a.

Reference numeral 15 denotes a discharge roller for discharging the sheet material S after recording, which is driven and rotated by a drive means (not shown). The discharge roller 15 is configured to be rotated by being pressed by a pinch roller 16, and the sheet material S after recording is pinched by the discharge roller 15 and the pinch roller 16, conveyed, and discharged from the apparatus. It is.

The speed difference between the respective conveyance sections is determined by the bin feed troughter 14.
If 1, then the feed roller 5 is at the same speed as the tractor 14, or at a speed of 1% to lO to avoid errors due to tolerances.
It is set about % slower. Further, the discharge roller 15 is set to be approximately 1% to 10% faster in order to provide tension for pulling up the sheet material S on the platen 4.

Next, a case in which fan-hold paper is conveyed using the recording apparatus configured as described above will be described with reference to FIG. 2.

When conveying fan hold paper, pinch roller 6
a, 6b rotate release shafts 9a, 9b, respectively, in the direction of the arrow in the figure to release the pressing state against the feed roller 5.

The fan hold paper fed by the pin feed tractor 14 is conveyed along the U-turn bus A between the upper guide 12 and the lower guide 13 along the upper guide 12. After being pressed onto the platen 4 by the pressing plate 10 and recording according to the image information by the recording pad 1, it is pulled out of the apparatus by the ejection roller 15.

The conveyance force of the discharge roller 15 is set to be larger than the load caused when the fan-hold paper slides on the upper guide 12 and the load caused by the pressing force of the presser plate 10, so that tension is always applied to the fan-hold paper.

The fan hold paper has an upper guide 12 and a lower guide 13.
Since the winding in the U-turn path A does not directly contact the feed roller 5 between the pin feed tractor 14 and the feed roller 5, it is not affected by the conveyance force of the feed roller 5 at all, and the difference in conveyance speed between the pin feed tractor 14 and the feed roller 5 is reduced. This can prevent the paper from being damaged and causing a jam.

Further, since the fan-hold paper is in contact with the upper guide 12 in the U-turn path A, the frictional state does not change due to changes in the environment, and stable conveyance can be performed.

Although this embodiment has been described with respect to an inkjet printing apparatus, it is also possible to apply the invention to printing apparatuses using other printing methods.

Further, the recording head 1 is not limited to a serial type, and may be a line type or other types.

Other Embodiments Next, another embodiment of the guide means applied to the recording apparatus will be described with reference to FIG. 3.

In this embodiment, an intermediate guide 17 is provided on the conveyance side for conveying the fan-hold paper, and a plurality of conveyance paths are provided that can convey the cut paper and the fan-hold paper separately.

That is, by feeding the cut paper from the conveyance path indicated by arrow a in the figure, the cut paper is pinched by the feed roller 5 and the pinch roller 6a, wound around the feed roller 5, and conveyed.

On the other hand, by feeding the fan-hold paper from the conveyance path indicated by the arrow in the figure, the fan-hold paper is conveyed so as to wrap around the intermediate guide 17, and the fan-hold paper is conveyed so as to wrap around the intermediate guide 17.
The structure is such that it is completely unaffected by the conveying force.

With the above configuration as well, stable conveyance can be performed without changing the frictional state due to changes in the environment.

Furthermore, since cut paper or fan-hold paper can be selectively fed and conveyed from the same direction, operability can be improved.

<Effects of the Invention> As described above, the present invention is provided with a guide means for forming a conveyance path for guiding the sheet material conveyed to the recording means so as not to come into contact with the conveyance roller. When using the fan-hold paper, the conveyance force by the conveyance roller is not applied to the fan-hold paper.

Therefore, stable conveyance can be performed without jamming the fan hold paper under any environment.

In addition, if multiple conveyance paths are provided as the guide means according to the type of sheet material, cut paper or fan-hold paper can be processed simply by changing the design of the parts without adding any new parts. Since each can be transported from the same direction, it is possible to improve operability at low cost.

[Brief explanation of drawings]

Fig. 1 is an explanatory cross-sectional diagram of the recording device, Fig. 2 is an explanatory diagram when conveying fan-hold paper, and Fig. 3 is an explanatory diagram of the other side.
FIG. 4 is an explanatory diagram of a conventional example. A is a U-turn path, S is a sheet material, l is a recording head, 2
is the carriage, 3 is the guide shaft, 4 is the platen, 5
is a feed roller, 6a, 6b are pinch rollers, 7a,
7b is a pinch roller arm, 8a and 8b are compression springs, 9
a, 9b are release shafts, IO is a holding plate, 11 is a compression spring, 12 is an upper guide, 13 is a lower guide, 14 is a bin feed tractor, 14a is a pin, 15 is a discharge roller, 16
1 is a pinch roller, and 17 is an intermediate guide.

Claims (2)

[Claims] (1) A conveying means having a conveying roller for conveying a sheet material, a recording means for recording on the sheet material according to image information, and a sheet material conveyed to the recording means being applied to the conveying roller. A recording device comprising: a guide means for forming a conveyance path for guiding the device so as not to touch the recording device. (2) The recording apparatus according to claim 1, wherein the guide means has a plurality of transport paths depending on the type of sheet material.