JPH0699632A - Recorder - Google Patents

Abstract

PURPOSE:To judge a terminal end of an ink sheet and an occurrence of an abnormality, such as defective feeding, in the ink sheet in a correct and positive manner. CONSTITUTION:A disk 50 with slits 50a radially arranged is provided on one end of a first winding member that can be wound with an ink sheet. An optical detection means for optically detecting the slits 50a of the disk 50 is provided on a device body. When the optical detection means does not receive signals of a predetermined period previously stored as the ink sheet is fed, the terminal end of the ink sheet or an occurrence of an abnormality in the ink sheet is judged. In this construction, the terminal end of the ink sheet and an occurrence of an abnormality, such as defective feeding, in the ink sheet can be known immediately and correctly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink sheet cartridge containing an ink sheet and a recording apparatus for recording by using the ink sheet, and more particularly to detecting the occurrence of an abnormality at the last end of the ink sheet and the ink sheet. The present invention relates to a recording device having a function.

[0002]

2. Description of the Related Art Today, with the development of information processing systems,
Various information processing devices have been developed. Among these devices, recording devices such as facsimile machines and printers are widely used not only in offices but also in general households. In order to facilitate downsizing, these so-called facsimile machines generally use a so-called heat-sensitive recording method that uses a heat-sensitive sheet that develops color when heated, but in recent years, so-called thermal transfer recording that uses an ink sheet. Facsimile machines according to the method have also been developed.

For example, as shown in FIG. 13, an ink sheet 100 having a base film coated with ink is supplied with a supply reel 10
It is wound around the winding reel 1 and the take-up reel 102 and loaded into the apparatus main body. During recording, the ink sheet 100 is conveyed by the rotation of the conveying roller 103a and the pinch roller 103b which are rotated and the recording sheet 104 is conveyed by the platen roller.
The recording is carried out by conveying the recording head 106 at 105 and heating the recording head 106 according to an image signal. This thermal transfer recording type facsimile apparatus has the advantages that plain paper can be used as a recording sheet and an image can be recorded clearly.

In the thermal transfer recording apparatus having the above-described structure, the method for detecting the final end of the ink sheet 100 is as follows:
A member having high reflectance (for example, silver paper) is attached to the ink sheet 100, and a reflection type optical sensor 107 for detecting the reflectance of the back surface 100a of the ink sheet 100 is provided.
Had detected the end of. Further, when the ink sheet 100 is cut or jammed during the transportation of the ink sheet 100, the supply reel 101 stops rotating. A disc (not shown) is provided at one end of the supply reel 101, and the disc has radial slits, and a sensor for optically detecting the slits is attached to the apparatus main body side.
When the rotation of 1 stops, the output of the sensor is fixed and the abnormality of the ink sheet 100 can be detected.

[0005]

However, in the above-mentioned conventional example, when the ink sheet 100 is cut or jammed during conveyance, the supply reel 101 may be stopped from rotating, but may be rotated or vibrated as it is. There is also a change in the output of the sensor that optically detects the slit of the disk, which gives a signal as if the supply reel 101 is rotating, which may cause an erroneous determination.

Therefore, an object of the present invention is to solve the above-mentioned problems, and to provide a recording apparatus configured to accurately and surely detect the occurrence of an abnormality in the final end of an ink sheet and the ink sheet. It is a thing.

[0007]

In order to achieve the above-mentioned object, a typical recording apparatus according to the present invention has a structure in which ink contained in an ink sheet is transferred to a recording medium to record an image on the recording medium. In a recording device, a first winding member capable of winding the ink sheet, a second winding member capable of winding the ink sheet, and holding the first winding member and the second winding member. With a frame body for, and further provided with a disk having a slit in the first winding member,
A detection unit for detecting the slit of the disk is provided, and when the signal of the predetermined period stored in advance in the detection unit cannot be obtained in accordance with the conveyance of the ink sheet, an abnormality occurs in the final end of the ink sheet or the ink sheet. It is characterized in that it is configured to judge that it has occurred.

[0008]

In the recording apparatus having the above structure, the first winding member capable of winding the ink sheet is provided with the disc having the slit, and the detecting means for detecting the slit of the disc is provided. When the ink sheet is being conveyed while the slit is detectable, it is determined that an abnormality has occurred in the final end of the ink sheet and the ink sheet when the detection unit does not receive a signal of a predetermined cycle stored in advance. With such a configuration, it is possible to accurately and surely know that an abnormality such as a defective conveyance has occurred in the final end of the ink sheet and the ink sheet.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the above means is applied to a recording apparatus will be illustrated and described below with reference to the drawings.

[First Embodiment] Recording apparatus A according to the present embodiment
Is configured as a recording system of a facsimile machine, FIG. 1 is an explanatory view of the entire structure of the facsimile machine, FIG. 2 is an external perspective view, FIG. 3 is a sectional view of an ink sheet, and FIG. It is a figure.

(Description of Entire Facsimile) First, the overall structure of the facsimile will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, this facsimile apparatus is composed of a recording system A as a recording device, a reading system B for reading an image written on a document, an operating section C, and an ink sheet cartridge D loaded. There is.

{Recording system} The recording system A records an image on the recording sheet 1 in response to an image signal transmitted from another device or an image signal transmitted from a reading system B described later. That is, the superposed recording sheet 1 and ink sheet 2 are pressed toward the platen roller 3b side by the recording head 3a constituting the recording means 3, and the platen roller 3b is driven and rotated in the arrow direction of FIG. The ink sheet 2 is conveyed in the direction of arrow a, and the ink sheet 2 is conveyed in the direction of arrow b by a drive mechanism described later. In synchronization with the conveyance of the recording sheet 1 and the ink sheet 2, the recording head 3a is caused to generate heat in accordance with an image signal to melt the ink applied to the ink sheet 2 (including sublimation, the same applies hereinafter), and the molten ink is recorded. The image is formed by transferring the image onto the sheet 1.

Then, the recording sheet 1 on which a predetermined image is formed
Is further conveyed in the direction of arrow a, cut by the cutter 4, and then conveyed by the pair of discharge rollers 5a and 5b to be discharged to the outside of the apparatus.

The recording sheet 1 is stored in a roll holder 7 provided in the main body 6 of the apparatus, and the roll holder 7, the platen roller 3b, the cutter 4, and the pair of discharge rollers 5a and 5b are provided in the main body 6 of the apparatus. It is provided.

The ink sheet 2 is housed in an ink sheet cartridge D having a structure described later in this embodiment. Then, the ink sheet cartridge D is detachably mounted on a recording cover 9 as a lid which is configured to be rotatable on the apparatus main body 6 via a rotary shaft 8. The recording head 3a is provided at a predetermined position on the recording cover 9.

[Reading system] On the other hand, the reading system B irradiates the original 10 with light and converts the reflected light into an electric signal, and transmits this signal to another machine according to the operation mode, or its own recording system. A
To be transmitted to. That is, a plurality of originals 10 are placed on the original placing table 9a formed on the upper surface of the recording cover 9, and the originals 10 are preliminarily conveyed by the preliminary conveying roller 11a and the pressing piece 11b, and the separating roller 12a and the pressing roller 11a are pressed against them. Pressure piece
The original 10 is separated and fed one by one by 12b, and the original 10 is conveyed by a pair of conveying rollers 13a, 13b and a pair of discharging rollers 14a, 14b and discharged to a discharge tray 15.
Then, while the document 10 is being conveyed, the document surface is irradiated with light from a light source 16, and the reflected light is led to a photoelectric conversion element 19 such as a CCD through a mirror 17 and a lens 18, and the image signal thereof is in a copy mode. In this case, the data is transmitted to its own recording system, and in the transmission mode, it is transmitted to the recording system of another device.

[Operation Unit] The operation unit C is a panel for performing the mode switching operation, the copy operation, the transmission operation, etc., as shown in FIG. 2, and is provided with keys corresponding to various operations. There is. The operation section C is provided above the document conveying mechanism in the reading system B, and is rotatable with respect to the apparatus body 6. A telephone handset 20 for transmitting and receiving is provided on one end of the operation unit C. In FIG. 1, reference numeral 21 is an electrical equipment substrate, and 22 is a power supply unit.

Next, the structure of each part of the recording system A, the ink sheet cartridge D, etc. will be specifically described.

(Recording Sheet) As the recording sheet 1, it is possible to use plain paper, a plastic sheet or the like and other materials that can transfer ink. In this embodiment, long plain paper having a B4 size width or an A4 size width is used as the recording sheet 1. The sheet roll 1a obtained by winding the recording sheet 1 into a roll is housed in a roll holder 7 provided at a predetermined position (generally in the center of FIG. 1) of the apparatus body 6.

Since the recording sheet 1 is wound in a roll, curling may occur. A decal shaft 23 is provided near the platen roller 3b side of the roll holder 7 for the purpose of removing it. The decurling shaft 23 rotates in response to the tension acting on the recording sheet 1, and cooperates with a guide shaft 24 described later to remove the curl of the recording sheet 1.

Further, in the present embodiment, in order to reduce the running cost, a so-called multi-print method is adopted in which recording is performed by making the conveying speed of the ink sheet 2 slower than the conveying speed of the recording sheet 1. This multi-print method
The transport length L _I of the ink sheet 2 is shorter than the transport length L _P of the recording sheet 1 at the time of recording (L _P / L _I = n
> 1) is recorded. By doing so, the use efficiency of the ink sheet 2 can be increased n times as compared with the conventional recording method (L _P / L _I = 1) in which the conveyance lengths of the recording sheet 1 and the ink sheet 2 are the same. .

(Ink Sheet) The ink sheet 2 is configured so that ink transfer can be performed n times in the same portion in order to perform multi-printing as described above. Therefore, in this embodiment, as shown in FIG. 3, four layers of the first heat-resistant coating layer 2a, the second base film layer 2b, the third ink layer 2c, and the fourth top coating layer 2d are used. It is composed.

The heat resistant coating layer 2a protects the base film layer 2b from the heat of the recording head 3a which is a thermal head. This heat-resistant coat layer 2a is suitable for multi-printing in which heat energy for n lines may be applied to the same location (when heat generation information is continuous), but whether or not to provide this heat-resistant coat layer 2a May be appropriately selected according to the recording method. It is effective to provide the heat resistant coating layer 2a on a base film having a relatively low heat resistance such as a polyester film.

The base film layer 2b of the second layer serves as a support for the ink sheet, and in the case of multi-printing, thermal energy is applied to the same location many times.
Aromatic polyamide film and capacitor paper, which have high heat resistance, are advantageous, but conventional polyester film can also be used. It is advantageous in terms of printing quality that these thicknesses are as thin as possible from the role of a medium, but strength must be taken into consideration and about 3 to 8 μm is preferable.

The third ink layer 2c is the recording sheet 1.
Is a layer containing an amount of ink capable of being transferred n times. This ink component is made of resin such as EVA as an adhesive, carbon black for coloring, carnauba wax as a nigrosine dye binding material, paraffin wax, etc. as a main component so as to withstand use n times at the same location. ing. The different sensitivity and concentration by the coating amount of the ink layer 2c, which may be arbitrarily selected ^{but, 4g / m 2 ~8g / m} 2 is preferably about.

The top coating layer 2d of the fourth layer is a non-recording portion and the ink layer 2c of the third layer is formed on the recording sheet 1.
To prevent pressure transfer of the toner, and is generally composed of a transparent wax or the like. As a result, only the transparent top coating layer 2d is pressure-transferred to the recording sheet 1 in the non-recording portion, and the background stain of the recording sheet 1 is prevented.

The constitution of the ink sheet 2 is not limited to that of this embodiment, and for example, a base layer serving as a support and a porous ink holding layer containing ink provided on one side of the base layer. Or a heat-resistant ink layer having a fine porous network structure formed on a base film, and the ink is contained in the ink layer.

The material of the base film layer 2b is, for example, polyimide, polyethylene, polyester,
It may be a film made of polyvinyl chloride, triacetyl cellulose, nylon or the like, or paper. Further, the heat-resistant coating layer 2a is not always necessary, but as its material, for example, silicone resin, epoxy resin, fluororesin,
It may be etrocellulose or the like.

Further, as an example of the ink sheet 2 having the heat sublimation ink, spacer particles and dye formed of guanamine resin and fluorine resin on a substrate formed of polyethylene naphthalate, aromatic polyamide film or the like. An ink sheet provided with a color material layer containing is included.

In this embodiment, the ink sheet 2 is used.
The ink sheet cartridge D is loaded with the ink sheet cartridge D for easy handling.

{Ink Sheet Cartridge} As shown in FIG. 4, the ink sheet cartridge D has a structure in which a supply reel 25 serving as a first winding member and a take-up reel 26 serving as a second winding member are provided in a predetermined frame 27. The ink sheet 2 is loaded by mounting the ink sheet 2 at the position and stretching the ink sheet 2 wound around the supply reel 25 to the take-up reel 26 side.
By using this ink sheet cartridge D, the ink sheet 2 for the recording system A can be very easily
In addition, it can be loaded reliably and stably.

When the ink sheet 2 is used up, the ink sheet cartridge D is discarded together with the ink sheet 2. That is, since the ink sheet cartridge D is disposable, it is required to be inexpensively provided.
Next, each part of the ink sheet cartridge D will be specifically described.

(Frame) The frame 27 in this embodiment has a first casing 27a and a second casing 27b ultrasonically welded together. That is,
As shown in FIG. 4, the welded portions 27c1 and 27c2 of the connecting portion between the first casing 27a and the second casing 27b are ultrasonically welded to each other, and the welded portions 27a1 formed at the substantially front end and the side end of the first casing 27a. , 27a4 and the welded portions 27b1 and 27b6 formed at substantially the front and side ends of the second housing 27b by ultrasonic welding.

The welded portions 27a1, 27b1 and 27c1, 27c2 may be formed over the entire length, or may be formed intermittently with a predetermined length in the ink sheet width direction.

A resin such as polypropylene resin or ABS resin can be used as a molding material for the frame 27.

In the frame 27, a window 27d, which is an opening for inserting the recording head 3a, is formed substantially in the center of the first housing 27a, as shown in FIG. Body 27b
A window 27e, which is an opening for inserting the platen roller 3b, is formed in the approximate center of the notch 27e1 for escaping the shaft portion 3b1 (see FIG. 1) of the platen roller 3b continuously to the window 27e. Are formed.

Side plates 27a2 and 27b2 are formed upright on both side surfaces of the first casing 27a and the second casing 27b, respectively, and the welded portions 27c1 and 27c2 and the open side are each 1/4 yen. A curved surface is formed. A fitting hole 27a3 is formed in the welded portion 27a1 formed on the open side curved surface end of the first housing 27a, and a welded portion formed on the open side curved end of the second housing 27b.
27b1 is formed with a fitting projection 27b3 which is fitted into the fitting hole 27a3.

On the open side curved surface of the second housing 27b, there is formed a locking projection 27b4 which engages with a lock latch provided on the recording cover 9 when the ink sheet cartridge D is mounted on the recording cover 9. There is. Further, the side plate 27b2 of the second housing 27b
At a predetermined position on both sides of the guide pin 27f, which serves as a guide when the ink sheet cartridge D is mounted on the recording cover 9.
Are formed.

At predetermined positions of the side plates 27a2, 27b2, a U groove 27g1 for holding a bearing 28a mounted on one end of the supply reel 26, and a shaft portion 29a of a slip clutch 29 attached to the other end of the supply reel 25. Bearings mounted on one end of the take-up reel 26 while forming a square groove 27g2 for holding the
A U groove 27g3 for holding 28b and a U groove 27g4 for holding the shaft portion 30a of the slip clutch 30 attached to the other end of the take-up reel 26 are formed. Also, the side plates 27a2, 27
In b2, U grooves 27g5 and 27g6 for holding a bearing 31a of a capstan roller 31, which is an ink sheet conveying member described later, are held.
Are formed. Further, the take-up reel 26 is provided on the second casing 27b.
An opening 27h for exposing the reel gear 32 is formed.

(Supply Reel and Slip Clutch) The supply reel 25 is for winding the ink sheet 2.
As shown in FIG. 4, a flange 25b1 is formed on each end of a reel shaft 25a having a length substantially the same as the width of the ink sheet 2.
25b2 is provided, a bearing 28a is loaded on one flange 25b1 side, and a slip clutch 29 which is a tension applying means is attached to the other flange 25b2 side.

On the one end side of the supply reel 25, that is, on the flange 25b1 side in the present embodiment, there is provided a disk 50 having radially divided slits 50a as shown in FIG. It is configured to rotate with the rotation of the reel 25. Further, as a means for optically detecting the slit 50a of the disc 50, a sensor (not shown) is provided on the apparatus main body side.
Is provided.

In the present embodiment, the slit 50a having the shape shown in FIG. 11 is formed on the disc 50, but the shape is not limited to this, and any shape that can be detected by the optical detecting means can be used. Any shape may be used.

The slip clutch 29 is provided on the supply reel 25.
This is to apply back tension to the ink sheet 2 pulled out from. As shown in the exploded view of FIG. 5 (a) and the sectional view of FIG. 5 (b), this slip clutch 29 is mounted so that a spring 29b is tightened on a shaft 29a having two-sided ends. , This spring 29
A hook portion 29b1 is formed on b. And the spring 29
Insert the shaft 29a to which the b is attached into the through hole 29c1 of the collar 29c,
Attach the E-ring 29d to the tip of the shaft 29a to prevent it from coming off. At this time, the hook portion 29b1 of the spring spring 29b is attached so as to be locked in the recess 29c2 formed in the through hole 29c1.

Further, the collar 29c is fitted into the hollow reel shaft 25a, and the convex portion 29c3 protruding from the outer peripheral portion of the collar 29c is formed on the reel shaft 25a.
It is fitted and locked in a U-shaped groove 25c formed at the end of 25a to be attached.

In the above structure, the supply reel 25 is connected to the frame 27.
When the ink sheet 2 is pulled out while attached to
The supply reel 25 rotates in the direction of arrow c in FIG. 5A (the direction in which the ink sheet 2 is fed). At this time, the shaft 29a is a frame body
Since it is locked in the square groove 27g2 of 27 and cannot rotate,
The spring spring 29b fastening the 29a receives a rotational force in the loosening direction, and a friction load is generated between the outer circumference of the shaft 29a and the inner circumference of the spring 29b. When the ink sheet 2 receives a conveying force and the supply reel 25 receives a rotational force of a predetermined torque or more, this spring load 29b causes the spring 29b to rotate.
Glide around the outer circumference while receiving the predetermined torque.

Therefore, from the supply reel 25 to the ink sheet 2
When pulling out the ink, a constant load is always applied, and thereby a back tension is applied to the ink sheet 2. Since the value of the loosening torque load of the spring spring 29b is stable, a stable back tension is applied to the ink sheet 2.

(Take-up reel and slip clutch) Next, the take-up reel 26 takes up the ink sheet 2 pulled out from the supply reel 25 at the time of recording. As shown in FIG. 4, this is the ink sheet 2 similar to the supply reel 25 described above.
Flanges 26b1 and 26b2 are provided on both ends of a reel shaft 26a having a length substantially the same as the width dimension of the above, a bearing 28b is loaded on one flange 26b1 side, and a rotational force transmission limiting means is provided on the other flange 26b2 side. A slip clutch 30 which is (torque transmitting means) is attached.

The slip clutch 30 is for applying a constant rotational torque to the take-up reel 26. The structure of this slip clutch 30 is shown in the exploded view of FIG. 6A and FIG. 6B.
Shaft part having D-cut fitting part 30a1 as shown in the sectional view of FIG.
A spring spring 30b is attached to 30a so as to be tightened, and a hook portion 30b1 is formed on this spring 30b.
Then, the reel gear is attached to the shaft portion 30a to which the spring 30b is attached.
32 while loosely fitting the shaft portion 30a into the through hole 30 of the collar 30c.
Insert it through c1 and attach E-rings 30d and 30e to the end of the shaft portion 30a to prevent it from coming off. At this time, the spring spring 30
The hook portion 30b1 of b is attached so as to be locked in the concave portion 32a formed in the reel gear 32.

Further, the collar 30c is fitted into the hollow reel shaft 26a, and the convex portion 30c2 protruding on the outer peripheral portion of the collar 30c is formed on the reel shaft 26a.
The U-shaped groove 26c formed at the end of 26a is fitted and locked.

In the above structure, the reel gear 32 is moved in the direction of arrow d in FIG.
When 26 rotates in the direction in which the ink sheet 2 is wound up), the spring spring 30b tightening the shaft portion 30a receives a rotational force in the loosening direction, and the outer periphery of the shaft portion 30a and the spring spring 30.
A frictional load is generated between the inner circumference of b and the inner circumference. Under the frictional load, the take-up reel 26 rotates in the direction of arrow d in FIG. 6A to wind up the ink sheet 2.

When the spring 30b receives a torque of a predetermined value or more, the spring 30b slides on the outer periphery of the shaft portion 30a while applying the predetermined torque. Therefore, the take-up reel 26 is always given a rotational force with a constant torque. The value of the loosening torque load of the spring spring 30b is stable as in the case of the slip clutch 29 of the supply reel 25.

In this embodiment, the supply reel 25 has a slip clutch 29 built-in, and the take-up reel 26 has a slip clutch 30.
By incorporating the above, a special space for providing the slip clutches 29, 30 is not required. Therefore, the gears and the like can be easily arranged in the design of the drive system, and the assemblability can be improved. Further, since the clutches 29 and 30 are exchanged together with the ink sheet cartridge D, it is sufficient that the clutch 29, 30 has durability for one roll of ink sheet.
Further, since the clutches 29 and 30 have a simple structure, they have an advantage that they can be manufactured at a lower cost than powder clutches which are commercially available.

Here, in the present embodiment, the take-up reel
When the ink sheet 2 is wound around the ink sheet 2, the base film 2b side, which is the end portion of the ink sheet 2, is attached to the outer peripheral surface of the reel shaft 27a of the take-up reel 26 with a tape or the like, and the ink application surface side of the ink sheet 2 is wound. The take-up reel 26 is rotated so as to face the inside of the take-up roll.

(Capstan Roller) Next, the capstan roller 31 is an ink sheet conveying member for giving a conveying force to the ink sheet 2, and in this embodiment, it is accommodated in the ink sheet cartridge D as shown in FIG. Has been done.

In this capstan roller 31, a roller portion 31c is formed by spraying silicone rubber or the like onto the outer peripheral surface of a core portion 31b made of a metal material, and a gear 31d is fixed to the end portion of the core portion 31b. Are configured. The capstan roller 31 has bearings in U grooves 27g5 and 27g6 of the frame 27 as shown in FIG.
Although 31a is fitted and attached, it is attached so as to be located on the upper surface side of the ink sheet 2 housed in the frame 27. When the ink sheet cartridge D is loaded in the recording system A, as shown in FIG. 1, in the recording conveyance direction of the ink sheet 2 (direction of arrow b in FIG. 1), the ink sheet cartridge D is wound downstream of the recording unit 3. The capstan roller 31 is configured to come into contact with the upper surface side of the ink sheet 2 on the upstream side of the take-up reel 26.

At the time of recording, the ink sheet 2 is conveyed by the capstan roller 31 which rotates in the direction of arrow e in FIG. In the multi-print method in which recording is performed while the recording sheet 1 and the ink sheet 2 are conveyed in opposite directions as in this embodiment, a force of about 15 kg at maximum is required as the force for conveying the ink sheet 2. There is. Therefore, in this embodiment, the capstan roller 31 and the ink sheet 2 are used.
If the friction coefficient between them is set to be in the range of 1.5 to 6.0, slip between them can be prevented. still,
In this embodiment, the friction coefficient is set to about 2.6.

Further, as shown in FIG. 7, the larger the wrap angle θ of the ink sheet 2 with respect to the capstan roller 31, the larger the contact area between the capstan roller 31 and the ink sheet 2 and the less likely slippage occurs. Therefore, in this embodiment, the winding angle θ is set to about 100 ° when the ink sheet 2 is not wound around the winding reel 26 (minimum winding roller diameter). As is apparent from FIG. 1, since the ink surface of the ink sheet 2 is wound inward, the ink sheet 2 is taken up by the take-up reel 26, and when the take-up roll diameter increases, the winding The angle θ also increases. Therefore, as the ink sheet 2 is wound up by the take-up reel 26, the ink sheet conveying force is reliably applied by the capstan roller 31. The winding angle θ
Is basically the capstan roller 31 and the ink sheet 2.
Should be in contact with each other, but in consideration of variations in dimensional accuracy of the recording apparatus body 6 and the ink sheet cartridge D, depending on the capstan roller diameter, 5 ° ≦
It may be set in the range of θ ≦ 180 °, preferably in the range of 70 ° ≦ θ ≦ 180 °, and more preferably in the range of 90 ° ≦ θ ≦ 180 °. In this embodiment, the winding angle θ is changed within the range of 100 ° to 130 ° depending on the change of the winding roll diameter.

As described above, the capstan roller 31 having a high friction coefficient is wound around the ink sheet 2 at a predetermined winding angle θ, so that the conveyance force is applied to the ink sheet 2 only by the capstan roller 31. Since it can be performed by the above, the conventional pinch roller becomes unnecessary.

It should be noted that in order to improve the conveyance accuracy of the ink sheet 2, it is better that the roller portion 31c of the capstan roller 31 is less deformed. Therefore, in this embodiment, the roller portion is
The thickness of 31c is thin so that it is about 75 μm. As a result, the roller portion 31c of the capstan roller 31 is less likely to be deformed, and the conveyance accuracy of the ink sheet 2 is improved.

Further, in this embodiment, since the capstan roller 31 is provided in the ink sheet cartridge D,
When the cartridge D is replaced, the capstan roller 31 is also replaced. Therefore, since the durability of the capstan roller 31 is sufficient for one roll of the ink sheet, the roller 31 can be easily manufactured.

When the capstan roller 31 is rotated at a constant speed, the carry amount of the ink sheet 2 depends on the roller diameter of the capstan roller 31. Therefore, particularly in the case of multi-printing, the recording n value (the value of the transport amount of the ink sheet 2 with respect to the transport amount of the recording sheet 1) is selected as the ink sheet cartridge D that houses the capstan roller 31 having a desired roller diameter. This can be dealt with easily.

(Assembly of Ink Sheet Cartridge) Next, in order to assemble the ink sheet cartridge D, the supply reel shaft 25a around which the ink sheet 2 shown in FIG. 4 is wound.
A bearing 28a is attached to one end, and the bearing 28a is attached to the second housing.
The U-shaped groove 27g1 formed in 27b is fitted, and the two-sided shaft portion 29a of the slip clutch 29 is fitted in the square groove 27g2.
Further, attach a bearing 28b to one end of the take-up reel shaft 26a,
The bearing 28b is fitted in the U groove 27g3 of the second housing 27b, and the shaft portion 30a of the slip clutch 30 is fitted in the U groove 27g4.
The bearing 31a of the capstan roller 31 is connected to the second housing 27b.
It fits in the U-grooves 27g5 and 27g6 formed in the above. Next the first housing 27
The ink sheet 2, the supply reel 25, the take-up reel 26, and the capstan roller 31 are attached to the second casing 27b by a and the welding portions 27a1 and 27b1 and the welding portions 27a4 and 27b6 are ultrasonically welded, respectively. The loaded ink sheet cartridge D is assembled.

(How to load the ink sheet cartridge)
In this ink sheet cartridge D, the recording cover 9 in the recording system A is opened as shown in FIG. 1, and the guide pin 27f of the cartridge base portion is used as the locking recess 9 formed in the recording cover 9.
The locking projection 27 at the tip of the cartridge
The recording system A is loaded by locking b4 with a latch member 33 attached to the recording cover 9.

[Recording Structure] The recording in the recording system A is performed by mounting the ink sheet cartridge D as described above and performing thermal transfer recording by the recording means 3.

(Recording Means) Next, the recording means 3 will be described. The recording head 3a used in this embodiment is a line type thermal head in which a plurality of heating elements that generate heat when energized are arranged in a line, and as shown in FIG.
It is swingably attached to the head support portion 3c provided on the. The recording head 3a is biased toward the platen roller 3b by a spring 3d arranged between the head 3a and the recording cover 9. The recording sheet 1 and the ink sheet 2 superposed by this urging force are pressed against the platen roller 3b.

Further, fork members (not shown) are provided on both sides of the recording head 3a in the longitudinal direction. The fork member includes an ink sheet cartridge D on the recording cover 9.
When the sheet is mounted, the shaft portion 3b1 of the platen roller 3b is engaged to have a positioning function for setting the position of the recording head 3a with respect to the platen roller 3b.

The platen roller 3b has a shaft portion 3b1 rotatably attached to the apparatus main body 6, and a roller portion 3b2 which is longer in the axial direction than the width dimension of the recording sheet 1 is formed at one end of the shaft portion 3b1. The platen gear 34 is fixedly attached as shown in FIG.

(Drive Transmission Structure) Next, the transport drive mechanism for the recording sheet 1 and the ink sheet 2 will be described with reference to FIG.

In FIG. 8, a platen motor 35 and an ink sheet motor 36 are attached to the apparatus body 6. The platen motor 35 has a motor gear 35a and a platen gear 34 meshing with each other, and the platen roller 3b is driven and rotated by driving the motor 35 to convey the recording sheet 1.

On the other hand, when the recording cover 9 loaded with the ink sheet cartridge D is closed, the motor gear 36a of the ink sheet motor 36 meshes with the gear 31d of the capstan roller 31, and the intermediate gear 37 meshes with the motor gear 36a. The reel gear 32 of the take-up reel 26 meshes. Therefore, when the ink sheet motor 36 is driven and rotated in the direction of arrow g in FIG. 8, the capstan roller 31 rotates in the direction of arrow e and the reel gear 32 rotates in the direction of arrow d. The ink sheet 2 is pulled out from the supply reel 25 by the rotation of the capstan roller 31, and is conveyed in the direction of arrow b in FIG. Then, the conveyed ink sheet 2 is taken up by the take-up reel 26.

The gear ratio is set so that the rotational peripheral speed of the take-up reel 26 is faster than the rotational peripheral speed of the capstan roller 31, and the take-up reel 26 rotates while slipping by the slip clutch 30. Is configured. The ink sheet 2 is taken up by the take-up reel 26 while being given a front tension by the slip.

By disposing the capstan roller 31 for imparting a conveying force to the ink sheet 2 in the vicinity of the platen roller 3b, it is possible to reduce the expansion of the ink sheet 2 and to convey the sheet more accurately.

When the ink sheet 2 is pulled out from the supply reel 25 by the rotation of the capstan roller 31, the above-mentioned disc 50 also rotates as the supply reel 25 rotates. Here, when the ink sheet 2 is normally conveyed, the output waveform of the sensor that optically detects the slit 50a of the rotating disc 50 becomes as shown in FIG. The binarized output signal of the output waveform of the sensor with respect to the sampling time T ₁ is as shown in FIG.

However, the output waveform of the sensor shown in FIG. 12A differs depending on the diameter of the ink sheet 2 wound around the supply reel 25. That is, since the transport speed of the ink sheet 2 is constant, when the diameter of the ink sheet 2 wound around the supply reel 25 is large, the angular velocity of the supply reel 25 is slow and the cycle of the output waveform of the sensor is also slow. . On the other hand, when the diameter of the ink sheet 2 wound around the supply reel 25 is small, the angular velocity of the supply reel 25 is fast and the cycle of the output waveform of the sensor is fast, contrary to the above-mentioned state. Therefore, the binarized output signal of the output waveform of the sensor changes depending on the diameter of the ink sheet 2 wound around the supply reel 25.

Therefore, according to the present invention, the pattern of the binarized output signal of the sensor between when the diameter of the ink sheet 2 wound around the supply reel 25 is maximum and when the diameter is the minimum is stored in the controller of the apparatus. When the sensor does not obtain a signal of the predetermined cycle (the storage pattern) while the ink sheet 2 is being conveyed,
It is configured to detect that the last end of the ink sheet 2 or an abnormality such as a conveyance failure has occurred on the ink sheet 2 and display it on the display unit of the apparatus or notify the user by an error sound or the like.

As a result, when the ink sheet 2 causes a jam or the like during conveyance, the supply reel 25 rotates irregularly or stops rotating, and the binary output signal of the sensor changes. Appears, a signal of a predetermined cycle stored in advance cannot be obtained, and conveyance failure of the ink sheet 2 occurs,
That is, it is prompt that an abnormality has occurred in the ink sheet 2,
And it is possible to judge accurately.

(Description of Control System) Next, a control system for driving and controlling each member will be described with reference to the block diagram shown in FIG. In FIG. 9, reference numeral 37 denotes a control section of the facsimile machine, which is a power supply section for supplying electric power to the entire apparatus.
NCU for connecting 38, modem board unit 39, and telephone 40
A board unit 41, a display unit 42 for displaying contents input from the operation unit C, and the like are arranged.

The control unit 37 controls the entire recording apparatus C.
It has a PU 37a, a ROM 37b which stores various programs and various data, and a RAM 37c which is used as a work area of the CPU 37a and temporarily stores various data such as the number of recorded sheets.

Reference numeral 37d is a line memory for storing an image of each line of the image data, and in the case of transmitting or copying an original, the image data for one line from the original reading system B is stored to store the image data of the image data. In the case of reception, the decoded data for one line is stored. The various data stored in the line memory 37d is recorded in the recording system A.
The image is recorded by being output to.

Reference numeral 37e is an encoding / decoding unit that encodes image information to be transmitted by MH encoding or the like, or decodes received encoded image data to convert it into image data. 37f is a buffer memory for storing the transmitted and received encoded image data.

Next, the electrical system connection between the recording system A and the control section 37 will be described with reference to FIG.

The recording head 3a is provided with a shift register 44 for inputting serial recording data 43a for one line from the controller 37, and the shift register with the latch signal 43b.
The latch circuit 45 for latching the data of 44 is equipped with a heating element 3a1 including a heating resistor for one line. The heating element 3a1 has m blocks (3a1-1 ... 3a1-m)
It is driven by being divided into. Further, the recording head 3a is equipped with a temperature sensor 46 for detecting the temperature, and an output signal 43c of the temperature sensor 46 is A / D converted in the control section C and input to the CPU 37. . As a result, the CPU 37a detects the temperature of the recording head 3a and changes the pulse width of the strobe signal 43d or the driving voltage of the recording head 3a according to the temperature, thereby changing the characteristics of the ink sheet 2. The energy applied to the recording head 3a is changed according to the above.

Although the type (characteristic) of the ink sheet 2 is selected by inputting from the operation section C or the like, it is also possible to detect the mark or the like printed on the ink sheet 2 to determine the type or characteristic. It is possible. It is also possible to identify a mark, a notch, a protrusion, or the like attached to the cartridge that stores the ink sheet 2.

Reference numeral 47 is a recording head drive circuit which inputs a drive signal for the recording head 3a from the control section 37 and outputs a strobe signal 43d for driving the recording head 3a in units of blocks. The recording head drive circuit 47 is the control unit.
According to the instruction of 37, the applied energy of the recording head 3a can be changed by changing the control time of the current output to the power supply line 43e for supplying the current to the heating element 3a1 of the recording head 3a.

Reference numerals 48 and 49 are motor drive circuits for rotationally driving the platen motor 35 and the ink sheet motor 36, which are the drive means. A stepping motor is used as each of the motors 35 and 36, but the motors are not limited to this and may be a DC motor or a servo motor.

Further, the control unit 37 includes a recording sheet sensor S ₁ for detecting the presence or absence of the recording sheet ₁ , an ink sheet presence sensor S ₂ for detecting the presence or absence of the ink sheet ₂ , an ink for detecting the conveyance speed of the ink sheet 2, and the like. Seat speed sensor S
The detection signal from ₃ is input, a predetermined display is performed on the display unit 42 according to the detection signal, and the recording operation is controlled.

(Recording Operation) During recording, the platen roller 3b conveys the recording sheet 1 in the direction of arrow a in FIG. 1, and at the same time, the capstan roller 31 conveys the ink sheet 2 in the direction of arrow b in FIG. Recording is performed while winding on the winding reel 26.

As described above, the recording sheet 1 and the ink sheet 2
When a multi-printing method is adopted in which and are conveyed in the opposite direction for recording, an image is formed while shearing the ink in the ink layer. Therefore, the conveyance of the ink sheet 2 is caused by the frictional force between the ink sheet 2 and the recording head 3a,
The additional force of the shear force of the ink is required. Therefore, the carrying force for the ink sheet 2 needs to be larger than the carrying force when the conventional one-time ink sheet is used.

In the multi-print recording system,
It is necessary to surely convey the ink sheet 2 by 1 / n lines each time when an image for one line is formed on the recording sheet 1 (recording n value). It is possible to improve the quality.

In order to satisfy the above conditions, in this embodiment, the capstan roller 31 imparts a highly accurate and reliable conveying force to the ink sheet 2.

[Other Embodiments] Next, other embodiments of the respective parts of the ink sheet cartridge and the recording apparatus described above will be described.

In the above-described embodiment, the multi-print system in which the recording sheet 1 and the ink sheet 2 are conveyed in the opposite directions for recording is illustrated, but a one-time ink sheet is used,
The one-time printing method in which the recording sheet and the ink sheet are conveyed in the same direction for recording is naturally possible.

Further, in the above-mentioned embodiment, the silicone rubber is sprayed as the capstan roller 31 to form the roller portion. However, it is not necessary to limit the silicone rubber to the silicone rubber. That is, any material can be used as long as the coefficient of friction of the ink sheet 2 can be obtained, and other materials such as chloroprene rubber can be used. Also, as a method of attaching the material to the core portion, one thin plate member may be wound around the core portion and attached. Further, a pipe-shaped member may be formed from the above material, and the core portion may be inserted through the pipe and attached. Alternatively, the rubber portion may be formed by molding.

In the case of manufacturing the above-mentioned thin plate, pipe, molding, etc., it is preferable that the outer peripheral surface of the rubber is mirror-finished.

Further, although the capstan roller 31 is built in the ink sheet cartridge D in the above-mentioned embodiment, the roller 31 does not necessarily have to be built in the cartridge D as a recording apparatus, and it is attached to the apparatus main body. Is also good.

[0096]

As described above, the disk that rotates with the rotation of the supply reel is provided, the slit is provided in the disk, and the sensor that detects the slit of the disk is provided, so that the ink sheet is conveyed. When a signal of a predetermined cycle stored in advance is not obtained by the sensor, it is configured to determine that an abnormality such as a conveyance failure has occurred at the final end of the ink sheet or the ink sheet, so that an erroneous determination can be made. It is possible to promptly and accurately know that an abnormality such as a conveyance failure has occurred on the last end of the ink sheet or on the ink sheet.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the overall structure of a facsimile device.

FIG. 2 is an external perspective view of a facsimile device.

FIG. 3 is a cross-sectional explanatory diagram of an ink sheet.

FIG. 4 is a development explanatory diagram of an ink sheet cartridge.

FIG. 5 is a structural explanatory view of a slip clutch on the supply reel side.

FIG. 6 is a structural explanatory view of a slip clutch on the take-up reel side.

FIG. 7 is an explanatory diagram of a wrap angle of an ink sheet with respect to a capstan roller.

FIG. 8 is an explanatory diagram of a drive transmission configuration.

FIG. 9 is a block diagram of a control system.

FIG. 10 is a block diagram of a recording control system.

FIG. 11 is an explanatory diagram of the shape of a disc that rotates together with the supply reel.

FIG. 12 is an explanatory diagram of an output voltage waveform of a sensor and an output signal after binarizing the waveform.

FIG. 13 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

A ... Recording system, B ... Reading system, C ... Operation part, D ... Ink sheet cartridge 1 ... Recording sheet, 1a ... Sheet roll, 2 ... Ink sheet, 2a ... Heat resistant coat layer, 2b ... Base film layer, 2
c ... Ink layer, 2d ... Top coating layer, 3 ... Recording means, 3a ... Recording head, 3b ... Platen roller, 3b1
... Shaft part, 4 ... Cutter, 5a, 5b ... Ejection roller pair, 6
... Device main body, 7 ... Roll holder, 8 ... Rotating shaft, 9 ... Recording cover, 10 ... Document, 11a ... Preliminary transport roller, 11b ... Pressing piece, 12a ... Separation roller, 12b ... Pressing piece, 13a, 13b ...
Conveying rollers, 14a, 14b ... Ejecting rollers, 15 ... Ejecting tray, 16 ... Light source, 17 ... Mirror, 18 ... Lens, 19 ... Photoelectric conversion element, 20 ... Handset, 21 ... Electrical board, 22 ... Power supply section,
23 ... Decal shaft, 24 ... Guide shaft, 25 ... Supply reel, 25a ... Reel shaft, 25b1, 25b2 ... Flange, 25c
... U-shaped groove, 26 ... Take-up reel, 26a ... Reel shaft, 26b1,
26b2 ... Flange, 26c ... U-shaped groove, 27 ... Frame, 27a ... First housing, 27a1 ... Welding portion, 27a2 ... Side plate, 27a3 ... Fitting hole, 27
a4 ... Welding part, 27b ... Second housing, 27b1 ... Welding part, 27b2 ... Side plate, 27b3 ... Fitting protrusion, 27b4 ... Locking protrusion, 27b6 ... Welding part,
27c1, 27c2 ... Welded portion, 27d, 27e ... Window, 27f ... Guide pin, 27g1 ... U groove, 27g2 ... Square groove, 27g3, 27g4, 27g5, 27g6
... U groove, 27h ... opening, 28a, 28b ... bearing, 29 ... slip clutch, 29a ... shaft, 29b ... spring spring, 29b1 ... hook portion, 29c ... tsuba, 29c1 ... through hole, 29c2 ... recessed portion, 29c3 ... convex portion , 29d ... E-ring, 30 ... Slip clutch, 30a ... Shaft,
30a1 ... D cut fitting part, 30b ... Spring spring, 30b1 ...
Hook part, 30c ... Tsuba, 30c1 ... Through hole, 30c2 ... Convex part, 31 ...
Capstan roller, 31a ... Bearing, 31b ... Core part, 31c ...
Roller portion, 31d ... Gear, 32 ... Reel gear, 33 ... Latch member, 34 ... Platen gear, 35 ... Platen motor, 35a ... Motor gear, 36 ... Ink sheet motor, 36a ... Motor gear, 37 ... Control section, 37a ... CPU, 37b ... ROM, 37c ...
RAM, 37d ... Line memory, 37e ... Encoding / decoding section, 37f ... Buffer memory, 38 ... Power supply section, 39 ... Modem,
40 ... Telephone, 41 ... NCU, 42 ... Display section, 43a ... Record data, 43b ... Latch signal, 43c ... Output signal, 43d ... Strobe signal, 43e ... Power supply line, 44 ... Shift register, 45 ...
Latch circuit, 46 ... Temperature sensor, 47 ... Recording head drive circuit, 48, 49 ... Motor drive circuit, 50 ... Disc, 50a ... Slit

Claims (1)

[Claims] 1. A recording device for transferring an ink contained in an ink sheet onto a recording medium to record an image on the recording medium, comprising: a first winding member capable of winding the ink sheet; and the ink sheet. A second winding member that can be wound up, and a frame body for holding the first winding member and the second winding member, and further, a disk having a slit is the first winding member. And a detection means for detecting the slit of the disk is provided, and when a signal of a predetermined cycle stored in advance in the detection means is not obtained in accordance with the conveyance of the ink sheet, the end of the ink sheet or the ink A recording apparatus configured to determine that an abnormality has occurred in a sheet.