JPS6116877A - Recording device - Google Patents

Abstract

PURPOSE:To remove the sag of an ink sheet by rotatably mounting a tension roller to a holder, to which a recording means is fitted, while holding the recording means. CONSTITUTION:When a cassette 9 is installed under the state in which a draft- base cover 17 is opened and the draft-base cover is closed, a platen roller 4 is inserted from an opening section 9e for the cassette 9, and pushed against a thermal head 3 through recording paper 5 and an ink sheet 1, and the thermal head 3 is pushed upward against the tensile force of a spring 15. The ink sheet is bent to a Chevron shape using the platen roller 4 as an apex from tension rollers 37, 37 sections, and sag is removed. The tension rollers 37, 37 are not brought into contact with the ink sheet 1 under the state in which the draft- base cover 17 is opened, and it is preferble that the tension rollers are brought to the state in which they are brought slightly into contact with it.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a recording device, and more particularly to a thermal transfer type recording device.

[Prior Art] A thermal transfer type recording device is a device that performs thermal transfer while transporting an ink sheet and recording paper between a recording section between a thermal head and a platen roller, and is used in facsimile machines and the like.

Conventionally, the ink sheet l to be superimposed on the recording paper has been used in the form of a roll wound around a winding core 2, as shown in FIG.

Therefore, when using such an ink sheet, a travel path for the ink sheet and recording paper as shown in FIG. 2 is required.

That is, the ink sheet 1 unwound from the roll is guided between the thermal head 3 and the platen roller 4 via the tension roller 6, further passed through the tension roller 7, and wound onto the take-up shaft 8.

On the other hand, the recording paper 5 is guided between the thermal head 3 and the platen roller 4 so as to be overlaid on the underside of the ink sheet 1.

In this manner, recording by thermal transfer is performed while the ink sheet and recording paper are conveyed while being sandwiched between the thermal head 3 and the platen roller 4.

If such a structure is adopted, the user of the apparatus must turn the ink sheet L wound into a roll as shown in FIG. 2, making loading the ink sheet an extremely complicated operation.

Additionally, if a jam occurs in the recording paper, the ink sheet gets in the way and the ink sheet must be removed and the reverse operation is required to remove the jam, which takes a long time to clear the jam. Put it away.

Furthermore, when replacing the recording paper, the ink sheet must be removed, resulting in an extremely complicated operation.

In order to solve this problem, a structure has been proposed in which a cassette containing an ink sheet is removably attached to a document table cover that can be opened and closed and is equipped with a recording means such as a thermal head.

A recording device having such a structure is shown in FIGS. 3 to 6.

The ink cassette 9 is integrally formed from synthetic resin or the like, and has bulges 9a having an arcuate cross section at both left and right ends.

9b is formed.

Cutouts 9c and 9d are formed at the lower ends of the inner side walls of these bulges 9a and 9b.

Further, on the substrate side of the cassette 9, a relatively large opening 9e is formed between the bulges 9a and 9b.

At both longitudinal ends of one bulge 9a are spindles l.
O is rotatably supported, and these spindles 10
．． The winding core 2 is held by 10.

Further, spindles 10 are rotatably supported at both longitudinal ends of the other bulging portion 9b, and a winding shaft 11 is held between them.

Then, the ink sheet l wound into a roll is attached to a bulging portion 9.
It is led out from the notch 9C of a and wound around the winding shaft 11.

Next, an example of a recording apparatus equipped with an ink cassette having the above structure will be described.

FIGS. 5 and 6 show a recording device exemplified as a facsimile machine, in which the same parts as in FIGS. 1 to 4 are denoted by the same reference numerals, and the explanation thereof will be omitted.

The recording paper 5 is housed in a roll in a recording paper holder 23 provided within the casing of the apparatus. The recording paper 5 guided from here comes into contact with the upper side of the platen roller 4, passes between two guide plates 20 and 20, passes between a pair of paper ejection rollers 22 and 22, passes between cutters 21 and 21, and exits the apparatus. is discharged.

The cassette 9 is an upper base 13 forming part of the device.
It is removably attached to the side via a fastening means (not shown). The upper base 13 is fixed inside the document table cover 17, and the document table cover 17 can be freely opened and closed together with the upper base 13 about a shaft 19 as shown in FIG.

A thermal head 3 is arranged on the upper base 13 side in a state fixed to a head holder 16. The thermal head 3 has one end rotatably attached to the upper base 13 by a shaft 29 via arms L6a at both ends of the head holder 16.

The lower limit of the free end of the thermal head 3 is regulated by a stopper (not shown).

A head press arm 14 is rotatably attached to the upper surface of the free end side of the head holder 16 via a shaft 14a, and a spring is connected between the head press arm 14 and a fixed part of the device. 15 are hung.

Therefore, the head press arm 14 is given a rotational force in the counterclockwise direction in FIG. 5, and applies a pressing force to the thermal in the direction of contacting the head 3-# platen roller 4.

This cassette mounting operation is performed by the user lifting the thermal head 3 via the head holder 16.

In addition, what is shown by the symbol tab and guided in a curved manner below the thermal head 3 is a paper guide.

Incidentally, the document table cover 17 is provided with a document width guide 18 that is movable according to the width of the document.

The document placed on the document table cover 17 is separated into sheets one by one through a feed section 329 and a separation section 33 constituting an automatic document feeder, and is fed while being sandwiched between a pair of document transport rollers 34 and 34. The paper is stocked onto the document tray 27 by a pair of paper discharge rollers 35 and 35.

The light is focused by 25 and formed into an image on a reading element 26.

Note that the reference numeral 24 indicates a power supply device.

When the apparatus starts with the structure described above, a drive system (not shown) moves the winding shaft 11. Pranarola 4.
The pair of paper ejection rollers 22 and the like enter a driving standby state and reading of the original is started.

Then, the thermal head 3 is driven in accordance with the read signal, and recording is performed on the recording paper 5 via the ink sheet 1 by thermal transfer.

The ink sheet 1 and recording paper 5 that have been recorded are placed on the guide plate 2.
The ink sheet l is separated by the separation part 30 at one end of the ink sheet l.
is wound up on the winding shaft 11, and the recording paper 5 is wound on the guide plate 20.2.
0, the paper is ejected by the paper ejection roller pair 22.22,
After all recording is completed, the cutter 21.21 cuts.

On the other hand, when replacing the recording paper or cassette, as shown in FIG.
Rotate counterclockwise around the center.

Then, the cassette 9 also separates from the platen roller 4 side, and the recording paper 5 and ink sheet 1 are separated from each other by a large distance.

In this state, the cassette 9 or the recording paper 5 may be replaced or jam cleared.

If such a structure is adopted, the ink sheet can be replaced with the entire cassette, and there is no need to hang and turn the roll of ink sheet, making it extremely easy to install the ink sheet.

Furthermore, the cassette can be separated from the platen roller together with the document table cover, and replacement work and jam removal can be performed in this state, making it extremely convenient to use.

In this way, it has become extremely easy to install the ink sheet, but if the ink sheet 1 in the cassette set 9 is sagging, the ink sheet 1 will wrinkle, causing image omissions during recording, and reducing the quality of the recording. It had the disadvantage of lowering the

In the conventional apparatus shown in FIG. 2, the slack in the ink sheet can be removed by the platen roller 6.7, but if a cassette type is used, it is difficult to provide a tension roller on the apparatus side.

[Purpose] The present invention has been made to eliminate the above-mentioned conventional drawbacks, and provides a recording device configured to remove slack in the ink sheet by providing a tension roller on the head holder side. The purpose is to provide equipment.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIG. 7 explains one embodiment of the present invention.
6 to 6 - Identical parts are denoted by the same reference numerals, and their explanations will be omitted.

In this embodiment, tension rollers 37 and 38 are provided near both ends of the head holder 16 that supports the thermal head 3 with support plates 36 in between.

The tension roller 37 located on the second side of the winding core is located below the other tension roller 38.

In addition, the tension rollers 37 and 38 are connected to the thermal head 3.
and are provided with the platen roller 4 in between.

By providing such tension rollers 37 and 38, the drawn out ink sheet 1 is transferred to the platen roller 4.
The ink sheet is bent before and after the ink sheet and guided between the thermal head 3 and the contact area with the platen roller 4 is increased, and the conveying force of the ink sheet 1 and the recording paper 5 is also increased.

Since this embodiment is constructed as described above, when the cassette 9 is installed with the document table cover 17 open and the document table cover is closed as shown in FIG. Inserted from 9e, recording paper 5. It is pressed against the thermal head 3 through the ink sheet 1, and the thermal head 3 is pushed upward against the tensile force of the spring 15.

Then, the ink sheet is bent from the tension rollers 37 and 38 into a mountain shape with the platen roller 4 at its apex, and the slack is removed.

It is preferable that the tension rollers 37 and 38 do not contact or only slightly contact the ink sheet 1 when the document table cover 17 is open.

Also, during recording, the winding core 2 rotates counterclockwise as the ink sea) 1 moves from the winding core 2 side to the winding shaft ll side, but the winding core 2 is rotated counterclockwise so that a clockwise load is applied to the winding core 2 side. Winding core 2 by friction means or spring, etc.
If the side is modified, stronger tension will be applied between the recording position and the winding core 2, and the wrinkle prevention effect of the tension roller 37 will further increase.

Furthermore, if a friction means or the like is similarly provided on the take-up shaft 11 side, the friction means will move against the take-up shaft 11 side at the time of rewinding the recording paper in order to adjust the margin at the leading edge of the recording paper 5. A clockwise load is applied, and strong tension is applied between the winding shaft 11 and the tension roller 4, thereby ensuring prevention of wrinkles.

[Effect] As is clear from the above description, according to the present invention, a pair of tension rollers is provided with the thermal head sandwiched between the head holder to which the thermal head is attached, and the ink sheet is connected to the platen roller and the thermal head. When the ink sheet is sandwiched between the cassette and the cassette, the ink sheet contacts the tension roller and is guided in a chevron-shaped manner by the platen roller, thereby eliminating slack in the ink sheet housed in the cassette. , it is possible to prevent the occurrence of wrinkles, and it is possible to improve the recording quality without causing image deletion or the like.

[Brief explanation of the drawing]

Figures 1 to 6 explain the conventional structure. Figure 1 is a perspective view of an ink sheet, Figure 2 is an explanatory diagram showing the arrangement of the ink sheet and recording paper, and Figure 3 (A) is a cassette. FIG. 3(B) is a partially cutaway plan view of the cassette, FIG. 4 is a perspective view of the cassette, FIG. 5 is a longitudinal side view of the cassette installed in the recording device, and FIG. FIG. 7 is a longitudinal sectional side view of the apparatus with the document table cover opened, and FIG. l... Ink sheet 3... Thermal head 4.
...Platen roller 5...Recording paper 9...Cassette 11...Take-up shaft 16...Head holder 17...Original table cover 36...Support plate 37.38
0...Tension roller ku" to the kube method-D

Claims (1)

[Claims] A recording device in which a cassette containing an ink sheet is detachably provided on the side of an openable/closable cover on which the recording means is provided, and a platen roller in contact with the recording means is provided on the device main body side, and the recording means is attached. A recording device characterized in that a tension roller is rotatably attached to a holder with a recording means sandwiched therebetween.