JPH0333475Y2 - - Google Patents

Description

[Detailed description of the invention] <Technical field> The invention involves inserting an ink sheet for thermal transfer and recording paper in a superimposed manner between a thermal head and a platen that are in contact with each other, and applying heat generation patterns according to the heat generation pattern of the thermal head. The present invention relates to a thermal transfer recording device that transfers and records ink from an ink sheet onto recording paper in a pattern.

<Background Art> In this type of apparatus, an ink sheet for thermal transfer is drawn out from a roll-shaped sheet supply source, fed between a thermal head and a platen, and then wound onto a sheet winding body. Therefore, when the remaining amount of the sheet supply source runs out, the remaining ink sheet is removed from the ink sheet transport system, the sheet supply source is replaced with a new one, and the ink sheet pulled out from it is transferred to the ink sheet transport system. need to be set.

<Disclosure of the invention> The present invention provides a structure for facilitating the replacement of thermal transfer ink sheets.Basically, the thermal head and platen can be separated, and thermal transfer can be performed in a separated state. This makes it easy to replace the ink sheet, and also makes it easy to connect the thermal head and platen again after the ink sheet is replaced.

<Embodiment> FIG. 1 shows a state in which a thermal head 1 and a platen 2 are in contact with each other. The ink sheet 3a pulled out from the ink sheet roll 3, which is the supply source of the ink sheet for thermal transfer, is moved to guide rollers 4 and 5.
Thermal head 1 and rotatable platen 2
After passing through the contact space between the first drive roller 6 and the pressure roller 7, the guide roller 8
The film is then wound onto a winding roll 9.

The first drive roller 6 is rotationally driven by a motor 10 via a transmission gear (not shown), and the winding roll 9 is also driven by the motor 10 via a belt (not shown).
Receives winding force from 0. Therefore, when the motor 10 rotates, the ink sheet 3a is drawn out from the ink sheet roll 3 by the feeding action of the first drive roller 6, and is finally wound onto the take-up roll 9.

The recording paper insertion path 11 transfers a single sheet of recording paper inserted from above to the platen 2 and the ink sheet 3.
Guide between a. The guided recording paper passes between the platen 2 and the thermal head 1 as the ink sheet 3a moves, and is then discharged upward via the discharge guide 12.

A second drive roller 13 and a pressure roller 14 are disposed in opposition to each other in the middle of the recording paper insertion path 1, while a third drive roller 15 is disposed in opposition to the discharge guide 12, and the recording paper is disposed in opposition to these rollers. By passing through the joint, the recording paper is forced to be drawn into the recording paper insertion path 11 and ejected to the outside of the ejection guide 12. The driving force for these second and third drive rollers 13 and 15 is applied from a motor 10 via pulleys coaxially connected to each end of these rollers, a belt 16, a pulley 17, a belt 18, and a pulley 19.

The thermal head 1 has a spring body 2 centered around a shaft 20.
1 to rotate clockwise, and is in elastic contact with the platen 2. Therefore, as the motor 10 rotates, the ink sheet 3a is fed, and when the recording paper is inserted into the recording paper insertion path 11, the recording paper moves along with the ink sheet 3a between the platen 2 and the thermal head 1. street,
At this time, the ink on the ink sheet 3a is transferred and recorded onto the recording paper in a pattern corresponding to the heat generation pattern of the thermal head 1.

Each of the above components is attached to a pair of fixed side plates 30 and a pair of movable side plates 31 arranged slightly inside and parallel to these fixed side plates. Note that one of the pair of fixed side plates 30 and the movable side plate adjacent thereto are both located in the front and therefore are not shown in the figure.

Supported by a pair of fixed side plates 30 are an ink sheet roll 3, guide rollers 4, 5,
The rotating shafts of the first drive roller 6, the guide roller 8, and the take-up roll 9, the shaft 20 of the thermal head 1, the motor 10, and the motor and the first drive roller 6.
and a transmission system between the winding roll 9 and the winding roll 9. In order to enable replacement of the ink sheet roll 3, a rotating shaft protruding from both ends of the ink sheet roll 3 is simply mounted on bearings 32 attached to a pair of fixed side plates 30. In addition, in order to make the winding roll 9 replaceable, the winding roll shaft 9a is made hollow, and the winding roll shaft 9a is made hollow, and the winding roll 9 is pressed and clamped from both ends by left and right reel plates 40, 41, as shown in FIG. . The left reel plate 40 is one fixed side plate 3
The right reel plate 41 is integrally and rotatably attached to a shaft 42 fixed to the fixed side plate 30 along with a pulley 43, and the right reel plate 41 can move forward and backward in the direction of the axis and freely rotate about the shaft 44 fixed to the other fixed side plate 30. It is attached to and further biased to the left by a spring 45. Therefore, by retracting the right reel plate 41 against the action of the spring 45, the take-up roll 9 can be easily installed and removed.

Supported by the pair of movable side plates 31 are the recording paper insertion path 11 , the second drive roller 13 and its pressing roller 14 , the platen 2 , the ejection guide 12 , the third driving roller 15 , and the pressing roller 7 .

A support rod 35 fixed across the pair of fixed side plates 30 passes through the pair of movable side plates 31, making the movable side plate 31 rotatable around the support rod 35, and allowing the pulley 17 to rotate freely. It is centrally supported.

A stop rod 33 is spanned between the rear upper ends of the pair of fixed side plates 30, and the clockwise rotation of the pair of movable side plates 31 about the support rod 35 is controlled by the rear ends of the pair of movable side plates 31. is restricted by contacting the stop rod 33. In this restricted state, the pair of movable side plates 31 are stabilized, and at this time, the thermal head 1 comes into elastic contact with the platen 2, and the pressing roller 7 comes into contact with the first drive roller 6. Note that the position of the platen 2 in this state will be referred to as a predetermined position hereinafter.

FIG. 2 shows the platen 2 separated from the thermal head 1. As shown in FIG. This state is achieved by flipping up the movable side plate 31 around the support rod 35, and at this time most of the ink sheet 3a is exposed, making it easy to replace the ink sheet.

On the other hand, since the platen 2 that was in contact with the thermal head 1 has separated, the thermal head 1 still rotates around the shaft 20 due to the action of the spring body 21, but the stopper shaft is fixed across the pair of fixed side plates 30. 3
4, its movement length is limited at an appropriate point. Therefore, after replacing the ink sheet roll 3 with a new one and setting the ink sheet 3a pulled out from it along its transport system, the movable side plate 31
When the platen 2 is lowered, the platen 2 automatically comes into elastic contact with the thermal head 1 at a predetermined position as shown in FIG.

<Effects> According to the present invention, an ink sheet for thermal transfer and recording paper are inserted between the thermal head and the platen, and the thermal head and the ink are transferred to the recording paper using heat generated by the thermal head. The sheet roll mounting section, the ink sheet winding section, and the ink sheet transport system are provided between a pair of fixed side plates, and the recording paper insertion/ejection system and platen are provided between the movable side plates. By flipping up the pair of movable side plates, the contact between the thermal head and the platen is largely separated, and the rotational movement length of the thermal head is limited by the stopper shaft, making it easy to replace the thermal transfer ink sheet. Moreover, it is easy to reconnect the thermal head and platen after replacing the ink sheet.
It can be done reliably.

[Brief explanation of the drawing]

1 and 2 are side sectional views showing different states of the embodiment of the present invention, and FIG. 3 is an enlarged sectional view of a portion of the same. 1...Thermal head, 2...Platen, 3...
... Ink sheet roll, 9 ... Winding roll, 1
1... Recording paper insertion path, 12... Ejection guide, 2
0...Shaft, 21...Spring body, 30...Fixed side plate,
31...Movable side plate, 34...Stopper shaft, 35...
...Support rod.

Claims (1)

[Scope of utility model registration request] A thermal transfer recording device that inserts an ink sheet and a recording paper between a thermal head and a platen, and performs transfer recording onto the recording paper using heat generated by the thermal head, includes a pair of fixed side plates and these fixed side plates. a pair of movable side plates that are provided slightly inside and parallel to these and are rotatable around a support rod that extends between the pair of fixed side plates, and that are partially retractable from between the fixed side plates; , the thermal head rotatably supported around a shaft embedded in the stationary side plate, an ink sheet roll mounting part for supplying the ink sheet, an ink sheet winding part, and the ink sheet roll. A transport system for transporting the sheet from the ink sheet roll to the ink sheet winding section is provided between the pair of fixed side plates, and the recording paper insertion/ejection system and a part of the movable side plate are provided between the fixed side plates. The platen is provided between the pair of movable side plates, and the platen faces the thermal head with the ink sheet interposed therebetween, and the thermal head is placed between the pair of fixed side plates with the thermal head centered on the axis. The thermal head is characterized in that it is provided with a spring body that is biased to rotate so as to come into elastic contact with the platen, and a stopper shaft that limits the maximum possible rotational movement length of the thermal head due to the action of the spring body. Transcription recording device.