JPS59124879A - Automatic fitting device for rolled form thermal recording paper - Google Patents

Abstract

PURPOSE:To unnecessitate to open or close a head part and enable to reduce the size of the titled device, by a method wherein the contact pressure between a head and a platen is reduced at the time of setting, and a recording paper is fed out from a holder by a feeding-out device. CONSTITUTION:When the recording paper 2 is used up, the holder 3 is forwardly drawn out along a guide rail 10, the recording paper 2 is set between a recording paper guide 16 and a recording paper presser 15 by operating a recording paper setting lever 18, and after locating a leading end part of the paper 2 on an extension part 13a of the holder 3, the holder 3 is returned into the device. Then, the contact pressure between the head 6 and the platen 4 is reduced by operating a pressure-reducing device 38 through operating the lever 18 or the like, and while maintaining this condition, a motor 23 is driven. When the leading end part of the recording paper 2 is fed out through a recording paper holder guide 13 and is let out to a predetermined position, the motor 23 is stopped, and the contact pressure between the platen 4 and the head 6 is returned to a predetermined value.

Description

[Detailed description of the invention] The present invention relates to a loading device for rolled thermal recording paper.

Conventionally, a loading device for a roll of thermal recording paper (hereinafter referred to as recording paper) in a thermal recording apparatus is shown in FIG. 1(a).
A device configured as shown in (b) is known. In other words, 1 is a thermal recording head unit that can be opened and closed, 2 is a recording paper, 3 is a recording paper storage unit, 4 is a platen, 5 is a guide plate, and 6
1 is a thermal recording head (hereinafter referred to as a head); 7 is a head image retention plate; when loading recording paper 2, the thermal recording head portion 1 is opened upward as shown in FIG. and,
After setting the recording paper 2 in the recording paper accommodating section 3 and setting its leading end on the platen 4 and inserting it into the guide plate 5, the thermal recording head section 1 is closed as shown in FIG. Loading of the recording paper 2 is completed by pressing the head 6 against the platen 4.

However, in such a conventional loading device, when the thermal recording head section 1 is opened, the head 6 is exposed to the outside and is easily damaged, and care must be taken when loading the recording paper 2. The head protection plate 7 is required to prevent damage due to contact with the device, and since the entire head 1 is lifted up, a large space must be secured inside the device body. It has many drawbacks, such as it is difficult to miniaturize, loading the recording paper 2 is troublesome, and the structure allows dust to easily enter from the top.

The present invention has been developed in view of the above-mentioned points, and when setting the head and platen, the pressure is reduced by a device that separates the head and the platen or reduces the contact pressure between them, and the recording paper is fed from the holder by the feeding device. Due to its extremely simple structure, the head part does not need to be opened or closed at all, making it possible to downsize the thermal recording device, prevent damage to the head, and improve handleability and durability. The present invention provides an automatic loading device for thermal recording paper.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 2 is a schematic configuration diagram showing an embodiment of an automatic loading device for rolled thermal recording paper according to the present invention, and FIG. 3 is a schematic cross-sectional view of a drive section for sending out recording paper and a receiving drive section of the same device. It is. Components in the figure that are the same as those in FIG. 1 are designated by the same reference numerals, and their explanations will be omitted. In these figures, the holder 3 is formed into a half-cylindrical shape and is disposed on a guide rail 10 so as to be movable in the front-rear direction (in the direction of left and right arrows A4+B in FIG. 3). The holder cover 11, which is also formed in a half-cylindrical shape, is attached to the top opening of the holder cover 11 so that it can be opened and closed freely by a hinge 12. , the hinge 12 of the holder cover 11
An extension portion 13a extending in the four directions of the platen and facing the opening end opposite to the opening end connected by the
, 13b are integrally extended, and these extension parts 1
3a and 13b constitute a recording paper holder guide 13 that serves as a guide when the recording paper 13 is fed out.

Inside the holder 3, there are projecting parts 1 which are disposed facing each other in the front and back and which pivotally support the inner hole 2a of the recording paper 2 wound into a roll.
Recording paper presser 15 and recording paper guide 1 having 5a and 16a
A recording paper set lever 1B having a spring 17 is attached to the recording paper presser 15. on the other hand,
The projecting portion 16a of the recording paper guide 1G has an integral shaft 20 that is inserted into the rear wall of the holder 3 and rotatably supported, and the rotation of the recording paper feeding device 21 is transmitted to this shaft 20. It is configured to This recording paper feeding device 2
1 includes a motor 23, a pulley 24 fixed to the output shaft 23a of the motor 23, and a belt 26 passed between this pulley 24 and a pulley 25 fixed to the shaft end of the platen 4.
, a belt 30 which is passed around a pulley 29 which is disposed between the pulley 25 and the shaft 27 via a one-way clutch 28;
0 and the like. Note that the shaft 20 is separated from the coupling 31 when the holder 3 is pulled out.

A head 6 disposed corresponding to the platen 4 has one end rotatably supported by a shaft 35, and is pressed against the platen 4 by a head suppressing spring 36.

In addition, when the head 6 is set, when it is set, the head 6 is pulled in a direction away from the platen 4 against the head pressing spring 36 by being operated from outside the apparatus, and a gap between the platen 4 and the head 6 is generated. A pressure reducing device 38 is provided to reduce the contact pressure. In this case, the pressure reducing device 38 is constituted by a connecting member 39 such as a wire or a connecting rod that connects a recording paper set lever (not shown) and the head 6, but it is not limited thereto, and a cam, a plunger, etc. can also be used. .

Next, the recording paper 2 is loaded in the automatic loading device having the above configuration.
Explain the loading procedure.

If there is no recording paper 2 in the holder 3, or if the recording paper 2 runs out, release the holder lock lever (not shown), pull out the holder 3 along the guide rail 10 to the front of the thermal recording device, and then remove the holder. Open the cover 11. In this state, operate the recording paper set lever 18 to set the recording paper 2 between the recording paper guide 16 and the recording paper presser 150, position the leading end of the recording paper on the extension 13a of the holder 3, and then close the holder cover 11. Close it and return the holder 3 along the guide rail 10 into the thermosensitive recording device. Next, the pressure reducing device 38 is operated by operating the recording paper set lever described above to reduce the contact pressure between the head 6 and the platen 4, and the motor 23 is driven while maintaining this state. Then, the motor 23
The rotation of the output shaft 23a is transmitted to the platen 4 via the pulley 24, the belt 26, and the pulley 25, and at the same time, the rotation is transmitted to the recording paper via the belt 30, the pulley 29, the one-way clutch 28, the shaft 27, the coupling 31, and the shaft 20. In order to transmit the information to the guide 16, the recording paper 2 is rotated and its leading edge is fed out from the recording paper holder guide 13, passes between the correspondingly rotating platen 4 and the head 6, and is transferred to the guide plate 5. guided inside. When the recording paper 2 is fed out to a predetermined position, the motor 23 is stopped and the contact pressure between the platen 4 and the head 6 is returned to a predetermined value. The loading work of the recording paper 2 is thus completed, and the thermal recording device is set and maintained in a state capable of recording and printing. Although the numeral 38 has been described as a pressure reducing device, it may be configured to provide a gap between the platen 4 and the head 6. In this case, the recording paper 2 is not fed by holding the recording paper 2 between the platen 4 and the head 6 as described above, but is fed out by sliding on the rotating platen 4. It will be done. When the motor 23 is stopped after being extended to the predetermined position R, the head 6 is restored and comes into pressure contact with the platen 4, and becomes ready for recording and printing.

As explained above, the automatic loading device for rolled thermal recording paper according to the present invention feeds out the rolled thermal recording paper in the holder by the recording paper feeding device, and places the rolled thermal recording paper between the thermal recording head and the platen. Since it is configured to automatically guide the recording head, there is no need to open and close the recording head as in the past, which not only simplifies the setting operation but also prevents damage to the head.
Also, since there is no need to secure space for opening and closing the recording head, it is possible to downsize the membrane itself and [
It also has the advantage of being difficult to get into. Furthermore, since it is equipped with a mechanism that separates the recording head and platen or reduces the contact pressure between them, the recording paper can be reliably set between them, which is extremely effective.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) show an example of a conventional thermal recording paper loading device, in which (a) shows a fully loaded state, (b) shows a loaded state, and FIG. 2 shows a rolled thermal recording paper according to the present invention. FIG. 3 is a schematic configuration diagram showing an embodiment of an automatic paper loading device, and FIG. 3 is a schematic cross-sectional view of a driving section for feeding recording paper and a receiving driving section of the same device. 2...Rolled thermal recording paper, 3...Holder, 4
...Platen, 6...Thermal recording head, 21.
. . . Recording paper feeding device, 38 . . . Decompression device. Patent applicant: Iwasaki Tsushinki Co., Ltd. Agent: Kazuko Yamakawa (and 1 other person)

Claims (1)

[Claims] A holder for storing a roll of thermal recording paper, a device for feeding the roll of thermal recording paper, a thermal recording head that is pressed against a platen, and a space between the thermal recording head and the platen when the roll of thermal recording paper is set. An automatic loading device for roll-shaped thermal recording paper, characterized in that it is equipped with a device for separating the two or reducing the contact pressure between the two.