JPS63115771A - Ink sheet cassette - Google Patents

Abstract

PURPOSE:To lower the rate of occurrence of jamming, by constructing an opening part and an edge part so that a first major plane of an ink sheet formed between the edge part and a payout roll forms an acute angle with a second major plane of the ink sheet formed between a payout roll containing part and a take-up roll. CONSTITUTION:A major plane 2A of an ink sheet 2 formed between an edge part 7f of an opening part 7e provided in a payout roll containing part 7a of an ink sheet cassette 7 and a payout roll 5 is set at an acute angle to a plane 28 of the ink sheet 2 formed between the payout roll containing part 7a and a take-up roll 6. With this construction, an image-receiving part 1 is securely released from the ink sheet 2 in the exterior of the payout roll containing part 7a, the paper 1 is prevented from penetrating into the containing part 7a, and the possibility of jamming is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a highly reliable and inexpensive ink sheet cassette useful as a hard copy device for outputting images on televisions, computers, etc.

Conventional rice technology In recent years, there has been a remarkable trend toward color display devices such as CRTs, and as a result, there is a growing demand for hard copy devices capable of color recording. Currently, the impact method, thermal transfer method, inkjet method, and electrophotographic method are being considered as color recording methods, but among these methods, the thermal transfer method is moving toward practical use due to its quietness, ease of maintenance, and cost. It can be said that this method leads other methods.

Conventionally, when color recording is performed using a thermal transfer method, an ink sheet 102 is coated with three colors of yellow 102b1 magenta 102c and '/77102d on a transparent base material 102a in the manner shown in FIG. Mark 102e, 1Q2f.

Apply 102q. As shown in FIG. 4, since the ink sheet 102 is a consumable item, it is provided with a reflective member 109 provided on the supply roll 105, take-up roll 106, sheet guides 112, 113, and seed guide 112 so that it can be easily replaced. The ink sheet cassette 107 is configured to be detachable from the apparatus. In a thermal transfer type recording apparatus, as shown in FIG.
'While being conveyed in the force direction, the linear thermal head 1
03 and the platen roller 104, and are pressed together with the ink sheet 102, and selectively heated by the heating elements 103a arranged linearly on the thermal head 103, the ink is transferred from the ink sheet 102 and an image is formed. Form. At the same time, the ink sheet 102 is moved in the direction of arrow b' via a sheet guide 112 by a sheet driving means (not shown), and is wound onto a take-up roll 106.

However, the supply roll 106 and the take-up roll 106 are each configured to transmit a predetermined torque via a slip mechanism (not shown). In the case of color recording, the image receiving paper 101 moves back and forth three times in the direction of arrow a' and arrow C' due to the forward and reverse rotation of the capstan roller 110 corresponding to each color ink, while the ink sheet 102 travels in the direction of arrow b'. Each color is sequentially transferred from the center, and by repeating the above operations, the three colors of yellow, magenta, and cyan are superimposed and recorded on the image receiving paper 101 to form a color image.

Here, in each color recording start position, a cell 10B provided at a position facing the reflective member 109 so that the recording start position of the ink of the corresponding color is located at a position facing the heating element 103a is used to control the recording start position on the ink sheet 102. Mark 102e, 102
f and 102g are detected respectively.

Problems to be Solved by the Invention However, with this method, a sheet guide is required to stabilize the running of the ink sheet, and the structure of the ink sheet cassette becomes complicated. Moreover, if the image-receiving paper is stuck to the ink sheet due to static electricity, when the image-receiving paper is conveyed in the opposite direction to the recording direction, the leading edge of the image-receiving paper may enter the supply roll storage section, causing jamming. It had the disadvantage of being

Means for Solving the Problem In order to solve the above-mentioned problems, the present invention guides the ink sheet by the edge of the opening of the supply roll storage section instead of the sheet guide, and there is a gap between the edge and the supply roll. The opening and the edge are configured such that the first main plane of the ink sheet to be formed makes an acute angle with the second main plane of the ink sheet formed between the supply roll storage section and the take-up roll. did.

Effect of the Invention With the above configuration, the present invention simplifies the configuration of the ink sheet cassette and reduces the price by eliminating the need for a sheet guide, and at least peels the image receiving paper from the ink sheet outside the supply roll storage section, thereby increasing the supply of the image receiving paper. It is possible to improve reliability by preventing intrusion into the roll storage section and reducing the incidence of jamming.

Embodiment Hereinafter, the configuration of an embodiment of the present invention will be explained with reference to the accompanying drawings.

FIG. 1 is a basic configuration diagram showing an ink sheet cassette and a thermal transfer recording device according to an embodiment of the present invention, in which 1 is an image receiving paper, 2 is an ink sheet, and 3 is a thermal head in which heating elements 3 are arranged in a straight line. , 4 is a platen roller. 6
is a supply roll formed by winding the ink sheet 2, and is indicated by arrow a.
The ink sheet 2 is connected to means (not shown) such as a slip mechanism so as to rotate with a constant torque relative to the rotation in the direction, and 6 is a take-up roll for winding up the ink sheet 2; It is rotated with a constant torque by a sheet winding means (not shown) via a sheet winding means (not shown). 12 is a sheet guide, and 7 is an ink sheet cassette that rotatably supports the supply roll 5 and take-up roll 6, and is attached to and removed from the main body of the apparatus along with the fixed sheet guide 12 in the depth direction of the drawing. Here, 8 is a sensor that has a light emitting part and a light receiving part and detects reflected light, 9 is a reflective member with gloss provided on the sheet guide 12 at a position opposite to sensor 8, 10 is a capstan roller, and 11 is a This is a pinch roller that is in pressure contact with the capstan roller 10.

2 is a schematic perspective view of the ink sheet cassette 7. FIG. As shown in the figure, the ink sheet cassette 7 has a supply roll storage section 7a and a take-up roll storage section 7b, and prevents foreign matter from coming directly onto the ink sheet 2. Also,
When the ink sheet cassette is inserted into the main body of the apparatus, the supply roll 6 and the take-up roll 6 are connected to a slip mechanism (not shown) through the openings 7C and 7d.

Here, the edge 7f of the opening 7e of the supply roll storage section 7a
has a shape protruding in the opposite direction to the running direction C of the ink sheet 2, and the ink sheet 2 runs guided by this edge Rof. As a result, the plane 24 formed by the ink sheet 2 from the supply roll 6 to the edge 7f
and the main plane 2B formed by the ink sheet 2 extending from the edge 7f to the sheet guide 12 form an acute angle with each other. Also the third
The figure is a perspective view showing the basic structure of the ink sheet 2, in which yellow (2b) and magenta (2C) are printed on a transparent base material 2a.
, cyan (2d), and opaque marks 2e corresponding to each color are coated with ink corresponding to the area of the recording screen, respectively.
It has 2f and 2g. However, since the mark 2e means the beginning of a set of three colors of ink, it is long so that it can be distinguished from other marks at the time of detection.

Next, the operation of the ink sheet cassette according to the third embodiment will be explained with reference to FIGS. 1 to 3.

When the ink sheet cassette 7 is inserted into the main body of the apparatus, the take-up roll 6 rotates in the direction of the arrow C, causing the ink sheet 2 to run in the direction of the arrow C. When the mark 2e on the ink sheet 2 blocks the detection of the light reflected by the reflective member 9 of the sensor 8, the take-up roll 6 further runs the ink sheet 2 in the direction of arrow C for a certain period of time, and the sensor 8 detects the reflected light. If not, it will stop. At this time, yellow ink 2 on ink sheet 2
The recording start position b faces the heating element 3a of the thermal head 3. Next, the thermal head 3 is pressed against the platen row 24, the capstan roller 10 is driven to rotate in the direction of the arrow d, and the image receiving paper 1 is conveyed in the direction of the arrow e at the position where the capstan roller 10 and the pinch roller 11 are in pressure contact. At the same time, the take-up roll 6 is driven to rotate in the direction of the arrow to apply tension to the ink sheet 2 while winding it up. Thermal head 3 at the same time
A desired recording signal is transmitted to the heating element 3a, and the heating element 3a selectively generates heat to transfer the ink on the ink sheet 2 to the image receiving paper 1, thereby obtaining a desired image. Also, when recording is finished, image receiving paper 1 is
The tip 1a reaches the vicinity of the thermal head 3. In this way, when one screen worth of recording with the yellow ink 2b is completed, the thermal head 3 is moved to the platen roller 4.
The capstan roller 1o is rotated in the direction of the arrow f to run the image-receiving paper 1 in the direction of the arrow q, thereby returning to the recording start state. At this time, the leading edge 1a of the image-receiving paper 1 runs in the vicinity of the ink sheet 2 against the running of the ink sheet 2, so it may run in close contact with the ink sheet 2 due to static electricity or the like. However, the leading edge 1a of the image receiving paper 1 is
When the ink sheet 2 reaches the edge 7f of the ink sheet cassette 7, which is bent at an acute angle, it is peeled off from the ink sheet 2, so that the image receiving paper 1 also enters the opening 7e of the supply roll storage section 7a of the ink sheet cassette 7. There's nothing to do.

Further, the ink sheet 2 is wound up in the direction of arrow C, and stops when the mark 2f blocks detection of the reflected light by the sensor 8.

At this time, the recording start position of the magenta ink 2C on the ink sheet 2 faces the heating element 3a. Hereinafter, in the same way as the recording operation using the yellow ink 2b described above, one screen worth of recording is performed using the magenta ink 2C, and the yellow ink 2
This is done by superimposing it on the image recorded by b. Similarly, recording is performed using the cyan ink 2d to complete recording of a full color image for one screen.

As described above, according to one embodiment of the present invention, the ink sheet 2 is guided by the edge 7i of the opening 7e provided in the supply roll storage section 7a of the ink sheet cassette 7 instead of the sheet guide. Ink sheet 2 is installed using a separate component.
The configuration of the ink sheet cassette 7 is simplified. Further, the main plane 2A of the ink sheet 2 formed between the edge 7f and the supply roll 5 is at an acute angle with the plane 2B of the ink sheet 2 formed between the supply roll storage section 7a and the take-up roll 6. By configuring this structure, the image-receiving paper 1 is reliably separated from the ink sheet 2 outside the supply roll storage section 7a, and the image-receiving paper 1 is prevented from entering the supply roll storage section 7a, thereby preventing jamming. Make it difficult.

In this embodiment, the edge 7f of the opening 7e of the supply roll storage section 7a of the ink sheet cassette 7 is configured integrally with the main body of the ink sheet cassette 7, but the edge 7f or the opening 7e is formed by a separate member. Alternatively, the same effect can be obtained by forming the supply roll storage section 7a.

In addition, in this embodiment, the recording method was a thermal transfer method, but as long as the method uses an ink sheet to perform the transfer, other methods such as an electric heat-sensitive method may be used, or the order of ink transfer may be changed to yellow. , magenta, and cyan, but it goes without saying that other orders are also possible.

Furthermore, in this embodiment, the image-receiving paper 1 was transported using the capstan roller 10, but other image-receiving paper transport methods such as rotational driving of the platen roller itself may be used.

Furthermore, in this embodiment, the mark 2e indicating the beginning of the ink set is longer than the other marks 2f and 2g, but the beginning of the ink set can also be detected using other methods such as providing it on both sides of the ink sheet 2. You can also get the same effect.

Effects of the Invention The present invention eliminates the need for guiding the ink sheet with a separate member by running the ink sheet using the edge of the opening provided in the supply roll storage section of the ink sheet cassette as a guide. The structure of the ink sheet is simplified, and the first main plane of the ink sheet formed between the supply roll and the edge is the second main plane of the ink sheet formed between the supply roll storage section and the take-up roll. By providing the edges of the supply roll storage section and the opening so as to form an acute angle with the plane, the image receiving paper can be reliably separated from the ink sheet 2 outside the supply roll storage section and the image receiving paper 1 can be transferred to the supply roll storage section. The ink sheet cassette can be obtained at a low price and with high reliability.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of an ink sheet cassette and a thermal transfer recording device according to an embodiment of the present invention taken along a plane perpendicular to the main scanning direction, and FIG. 2 is a perspective view of the schematic structure of the ink sheet cassette shown in FIG. 3 is a perspective view of the schematic structure of the ink sheet shown in FIG. 1, FIG. 4 is a sectional view of the schematic structure of a conventional ink sheet cassette and thermal transfer recording device, and FIG. 5 is a schematic structure of the ink sheet shown in FIG. 4. FIG. 2... Ink sheet, 2A... First main plane, 2B... Second main plane, 6...
・Supply roll, 6... Winding roll, 7...
- Ink sheet cassette, 7a...supply roll storage section, 7e...opening, 7f...edge, 12...sheet guide. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 78 7f# section Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A supply roll having an ink sheet wound thereon, a supply roll storage unit having an opening for pulling out the ink sheet from the supply roll, and stretching and winding the ink sheet using at least an edge of the opening as a guide. an ink sheet take-up roll, and the first main plane of the ink sheet formed between the supply roll and the edge is formed between the supply roll storage section and the take-up roll. An ink sheet cassette forming an acute angle with respect to a second main plane of the ink sheet.