JPH03169578A - Printer - Google Patents

Abstract

PURPOSE:To obtain a printer capable of preventing a roll-form ink film from being set to a take-up part by mistake by a method wherein the dimension or shape of a first core for taking up an ink film used for printing is made different from that of a second core of the roll-fore ink film. CONSTITUTION:In a thermal printer, an outer diameter d1 of a set shaft 41a and a receiving shaft 42 of an ink film supply part 40a and an outer diameter d2 of a set shaft 61b and a receiving shaft 62a of a take-up part 6b are respec tively determined to dimensions corresponding to an inner diameter D1 of a core 43a and an inner diameter D2 of a core 63b so that each shaft can be inserted into the proper core. The core 43a cannot be set to the set shaft 61b and the receiving shaft 62a. The core 63b cannot be set to the set shaft 41a and the receiving shaft 42. Therefore, if a roll-form ink film 4a is set on a wrong side at the time of replacement or the like, an operator is immediately aware of this error and can set the core 43a to the set shaft 41a and the receiv ing shaft 42 and set the core 63b to the set shaft 61b and the receiving shaft 62a. As a result, the error of loading the second core on the first core setting part inadvertently can be prevented, and even an unskilled operator can easily replace the ink film on the proper side.

Description

[Detailed Description of the Invention] [Summary] Regarding a printer in which the core of the rolled ink film and the core for winding the ink film have different shapes, it is possible to prevent the rolled ink film from being set in the winding section by mistake. The purpose of the present invention is to provide a printer that can prevent the above-mentioned printing, and is equipped with an ink film supply section in which a roll-shaped ink film is set, and a winding section that winds up the ink film supplied from the ink film supply section and used for printing. forming a first core set in the winding unit and winding up the ink film used for printing and a second core of the rolled ink film set in the ink film supply unit to have different dimensions or shapes; The size or shape of the first core setting section of the winding section is formed to a size or shape that allows the first core to be set but does not allow the second core to be set, and the ink film supply section The size or shape of the second winding core setting part is formed to a size or shape that allows the second winding core to be set.

[Industrial application field]

The present invention relates to a printer having an ink film setting mechanism for the printer, and more particularly to a printer in which the core of the rolled ink film and the core for winding the ink film have different shapes.

BACKGROUND OF THE INVENTION In recent years, transfer type thermal printers have been widely used as output devices for office automation equipment such as facsimile machines and word processors, as they are capable of producing relatively high-quality and long-lasting prints.

The ink film used in this thermal printer is a polyester film coated with heat-soluble ink on one side and wound around a core in the form of a roll. It is wound onto the core. However, an inexperienced operator may accidentally load the replacement ink film in the wrong direction, so a mechanism to prevent this is desired.

[Conventional technology]

Figure 3 is a side view showing the outline of a transfer type thermal printer.
FIG. 4 is a configuration diagram showing a conventional example of an ink film supply section and a winding section.

As shown in FIG. 3, printing paper 3,
and the ink film 4 from the ink film supply section 40a.
a is a line-type thermal head 1 and a platen roller 2
The spring 5a is supplied in layers from the same direction between the
, 5b is pressed against the platen roller 2 with a predetermined pressure by the thermal head 1.

The platen roller 2, the winding section 6a, and the ink film supply section 40a are connected to a motor MH (see FIG. 4), and the printing paper 3 and the ink film 4a are transported at the same speed by the rotation of the motor M1. However, the ink film supply section 40a
is driven only during pack feeding, which will be described later.

As shown in FIG. 4, the winding section 6a and the ink film supply section 40a are connected to the side frame. It is supported by a and 7b. A torque limiter 60 is attached to the set shaft 61a of the winding section 6a, and the diameter changes sequentially as the ink film 4a is wound up on the winding section 6a.
In order to take up the winding at the same speed, the set shaft 61a is rotated at a winding speed faster than the transfer speed of the platen roller 2, and if a torque exceeding a predetermined value is applied to the winding, it will idle.

Further, the winding n6a is connected to a set shaft 61a driven by the motor M1, and a spring 65 facing the set shaft 61a.
A winding core 63a is removably set between the receiving shaft 62, which is wound around the receiving shaft 62 and moves in and out in the axial direction by operating the knob 64. That is, the set shaft 61a and the receiving shaft 62 are connected to the winding core 63.
The key 6 is fitted into the inner diameter of a and is provided on the set shaft 61a.
6 and a slit 67 provided in the winding core 63a are engaged with each other. Further, in the ink film supply section 40a, the core 43a of the ink film 4a is set between the set shaft 41a, which is driven by the one-way clutch 48 actuated by the reverse rotation of the motor M1 during pack feeding, and the receiving shaft 42, which is rotatably supported.・It is. A spring 45 is wound around the receiving shaft 42, and the shaft 42 moves in and out in the axial direction by operating a knob 44. That is, the set shaft 41a and the receiving shaft 42 fit into the inner diameter of the winding core 43a, and the key 46 provided on the set shaft 41a and the winding core 43a
A slit 47 provided in is engaged with the slit 47 . Winding core 43a
, 63a are made of cardboard and are formed into a pipe shape with the same dimensions.

Referring again to FIG. 3, the thermal head 1 is equipped with resistive heating elements (not shown) arranged in a line across the printing range in the width direction of the printing paper 3, and the resistive heating elements are selected based on the printing data. When a pulse current flows, the corresponding resistance heating element generates heat, and the ink on the ink film 4a is dissolved and transferred to the printing paper 3 in the form of dots.

Therefore, the printing paper 3 on which thermal transfer printing has been performed by the thermal head 1 is sent in the direction of arrow A by the drive of the platen roller 2, and the printing paper 3a and the ink film 4 are moved by the roller R1.
a is separated.

When printing of one page is completed, the printing paper 3 is sent to the cutter section 7, cut into a predetermined size, and sent out.

Further, the used ink film 4a is wound up by the winding section 6a. Thereafter, the leading edge of the unprinted printing paper 3a is back-fed together with the ink film 4a to the printing start position, and printing of the next page is started.

When the ink film 4a of the ink film supply section 40a is sequentially wound up by the winding section 6a and reaches the near end, it is detected by a sensor (not shown) and the ink film 4a is replaced. New ink film to be replaced 4
In case a, the ink film 4a wound into a roll around a core 43a and the winding core 63a on the winding side are a set, and are replaced together.

[Problem to be solved by the invention]

According to the above conventional method, when replacing and setting the ink film, the core on the winding side and the core on the feeding side, that is, the core of the rolled ink film, have the same size, so it is easy to make a mistake and load them with the front and back reversed. Sometimes. Measures to prevent this incorrect loading include cautions in instructions and labels,
A method of distinguishing by color coding is used, but if it is possible to load in the opposite direction, there is a problem that there is a possibility of accidentally loading the wrong one.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printer that can prevent a roll of ink film from being erroneously set on a winding section.

[Means to solve the problem]

FIG. 1 shows a diagram of the principle of the present invention.

In the figure, 4 is an ink film, 6 is a winding part, 40
63 is a first core for winding up the ink film 4 used for printing; 43 is a second core of the roll-shaped ink film 4 formed in a different size or shape from the first core 63; A winding core 61 is provided in the winding part 6, and is a first winding core setting part formed in a size or shape in which the first winding core 63 can be set and the second winding core 43 cannot be set; Reference numeral 41 denotes a second core setting section provided in the ink film supply section 40 and in which the second core 43 is set.

Therefore, the second winding core 43 is prevented from being set in the first winding core setting section 61.

[Effect]

When setting the roll-shaped ink film 4, it is impossible to set the second core 43 in the first core setting section 61 provided in the winding section 6, so I immediately noticed the mistake and set the first core set section 61. This prevents the winding core 63 and the second winding core 43 from being mistakenly set on opposite sides, and even an inexperienced operator can easily and correctly replace them.

〔Example〕

Hereinafter, a thermal printer to which an embodiment of the present invention is applied will be explained with reference to FIG. The same reference numerals refer to the same objects throughout the design.

Items with the same names as in Figure 1 in Figure 2 correspond to each other, and set shafts 4La, 6lb, winding cores 43a, 63 in Figure 2 correspond to each other.
h corresponds to the second core set part 41, first core set part 61, second core 43, and first core 63 in FIG. 1, respectively.

As shown in the side view and main part plan view of FIGS. 2(a) and 2(a), the inner diameter 01 of the winding core 43a and the inner diameter D2 of the winding core 63b are set to different dimensions (01<02).

Set shaft 41a and receiving shaft 4 of ink film supply section 40a
The outer diameter d1 of 2, the set shaft 6lb of the winding part 6b, and the outer diameter d2 of the receiving shaft 62a are set to fitable dimensions corresponding to the inner diameter D1 of the winding core 41a and the inner diameter D2 of the winding core 63b, respectively. Therefore, the winding core 43a has the set shaft 6lb and the receiving shaft 62a.
The winding core 63b cannot be set on the set shaft 41a. It cannot be set on the bearing shaft 42. Further, 66a represents a key, and 67a represents a slit.

With this structure, when setting the rolled ink film 4a for replacement, etc., the setting shaft 6To. Since it is impossible to set the winding core 43a of the rolled ink film 4a on the receiving shaft 62a, I immediately noticed the mistake and set the winding core 43a on the set shaft 41a and the receiving shaft 42, and then set the winding core 63b. It can be set on the shaft 6lb and the receiving shaft 62a.

Therefore, it is possible to prevent the winding core 63b and the winding core 43a from being mistakenly loaded on the opposite side, and even an inexperienced operator can easily and correctly replace the winding core 63b and the winding core 43a.

In the above example, the case was explained in which the diameter D2 of the winding core 63b on the winding side was made larger than the diameter D1 of the winding core 43a on the supply side.
On the other hand, if DI>02, set shaft 6lb, receiving shaft 62a
and set shaft 41a. The diameters of the bearing shafts 42a may be matched.

Further, in the above example, the case where the winding core 63b and the winding core 43a are made to have different outer diameters has been explained, but other methods with different shapes, for example, the winding core 63b and the winding core 43a are made to have the same diameter, and the set shaft 6l
b is provided with a plurality of keys 66, and a winding core 63a is provided with a plurality of keys 66.
6 is provided with a plurality of slits 67 that engage with the set shaft 4.
1a and the winding core 43a may have one key 46 and one slit 47, so that the winding core 43a and the set shaft 6lb cannot be fitted.

〔Effect of the invention〕

As explained above, according to the present invention, the first core is set in the first core set section of the winding section, and the first core is set in the second core set section of the rolled ink film supply section. forming a second core of the ink film in a different shape;
By forming the first winding core setting part in a shape that allows the first winding core to be set but does not allow the second winding core to be set, the second winding core may be accidentally set in the first winding core. This has the effect that mistakes in loading the core set section can be prevented, and even an inexperienced operator can easily and correctly replace the core.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the principle of the present invention, Fig. 2 is a diagram showing the structure of an embodiment of the invention, Fig. 3 is a side view showing an outline of a thermal printer, and Fig. 4 is a diagram showing the structure of a conventional example. be. In the figure, 4 and 4a are ink films; 6. 6a and 6b are winding parts; 40. 40a is an ink film supply section, 41 is a second core set section, 41a, 61a. 6lb is a set shaft, 43 is a second winding core, 43a. 63a, 63b are winding cores, 61
is the first winding core set part, the 45th day of the book, Hara J Rizu Tsubasa 1 Figure (.2) Isari ``i く (b)! Figure 2: Outline of the thermal burner to which the wood plane is applied Figure 3: Figure M1: Illustration of the T configuration diagram

Claims (1)

[Claims] An ink film supply section (40) in which a roll-shaped ink film (4) is set, and a winder for winding up the ink film (4) supplied from the ink film supply section (40) and used for printing. Department (
6), the printer comprising: the winding section (6);
The ink film (
4) and the ink film (4) set in the ink film supply section (40).
) is formed to have a different size or shape, and the first core set portion (61) of the winding portion (6) has a different size or shape than the first core (43); 63), and the second core set part (41) of the ink film supply part (40) has a dimension or shape that makes it impossible to set the second core (43). Alternatively, a printer characterized in that the second core (43) is formed in a size or shape that allows the second core (43) to be set therein.