JPS5831771A - Wire dot printer - Google Patents

Abstract

PURPOSE:To prevent the disorder of dot shape and the smearing of a recording medium by providing a drying means for ink dots formed near the recording medium in a printer to form dots by transferring ink adhered to a wire to the recording medium. CONSTITUTION:Ink dots 15 formed on a recording medium 2 by a wire are dried by an ink drying means provided near the recording medium 2. The ink drying means used includes a heater 14a, a luminous material 14e, and a fan. In the case of the heater 14a, heat is generated from the heater 14a by an electric current supplied from a power source circuit 14c to dry the solvent of the ink by vaporization. Also, in the case of the luminous material 14e, light generated from the luminous material 14e is focused onto the recording medium 2 through a lens 14d. By the photo energy, the solvent of the ink can be vaporized. Or, the solvent may be vaporized by means of the fan.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for bringing a wire into contact with and separating from a recording medium.
This is a wire dot printer that forms dots by making ink attached to the tip of a wire adhere to a recording medium.

Conventionally, a holding hole is formed in a wire holding member' facing a recording medium, and an ink reservoir is provided which communicates with the holding hole.
- A wire is slidably disposed in the holding hole and the ink reservoir, and the wire is brought into contact with and separated from the recording body, thereby causing the ink attached to the tip of the wire to adhere to the recording medium, and A wire dot printer is known which continuously forms predetermined ink dots by replenishing an amount of ink equal to the amount of ink adhered to a recording medium from an ink reservoir through a minute gap between the holding hole and the wire. There is.

However, when the above-mentioned wire dot printer forms dots continuously, the amount of ink that adheres to the recording medium is not constant, and when the amount of ink that adheres is large, the shape of the dots changes because the ink dries slowly. However, there are disadvantages in that the recording medium may become dirty or the ink may adhere to other parts and stain the recording medium.

SUMMARY OF THE INVENTION The object of the present invention is to provide a wire dot printer that can overcome the above-mentioned drawbacks.

The present invention provides a wire holding member that is movable relative to the recording medium 2, a wire held by the wire holding member and slidably arranged, and an ink at the tip of the wire facing the recording medium. an ink supply means for supplying ink; a driving means for bringing the wire into contact with and away from the recording medium while relatively moving the wire holding member and the recording medium; and a driving means for bringing the wire into contact with and away from the recording medium by this driving means. The apparatus is characterized by comprising an ink drying means for drying ink dots formed by causing the ink held at the tip of the wire to adhere to the recording medium.

The present invention will be described in detail below based on the illustrated embodiments.

In FIG. 1, reference numeral 1 indicates a platen, and the recording medium 2 is placed in contact with the platen IK. A movable wire holding member 3 is disposed opposite to and parallel to the recording medium 2. A holding hole 4 is formed at the tip of the wire holding member 3 facing the recording medium 2, and a hollow ink reservoir 5 is provided in communication with the holding hole 4. This ink reservoir 5 is filled with ink 6. A holding hole 7 is formed in the rear wall of the ink reservoir portion 5 formed in the wire holding member 3.
Furthermore, another holding hole 8 is provided in communication with this holding hole 7. A wire support 9 is slidably disposed in the holding hole 8, and two protrusions 9a and 9b are formed at the rear end of the wire support 9. A suppressing spring 10 is provided between the rear end surface of the wire holding member 3 on the opening side of the holding hole 8 and the projection 9a, and this spring 10 separates the wire support 9 from the recording medium 2. Pressing in the direction. A wire 11 is fixed to the tip of the wire support 9, and the wire 11 is inserted through the holding hole 7, the ink reservoir 5, and the holding hole 4.
Moreover, it is slidably held in each holding hole 4.7.

The rear end of the wire holding member 3 has a U-shaped cross section, and the wire support 9 is located at the center of the rear end.
is located. One end of two actuators 12 is rotatably supported on the rear end wall of this wire holding member 3, and the other end of these actuators 12 is connected to a protrusion 9a provided on the wire support 9. and protrusion 9b
is located between. At the rear end of the wire holding member 3, two electromagnets 13 are arranged closer to the recording medium 2 than the actuator 12. These electromagnets 13 are connected to image current supply means (not shown), and this image current supply means supplies image current to the electromagnets 13. When an image current is supplied by the image current supply means, the electromagnet 13 attracts the actuator 12. When this actuator 12 is attracted by the electromagnet 13, it moves the wire support 9 against the pressing force of the spring 10, and moves the wire 11 integrated therewith in the direction of the recording medium 2 to contact it. The above wire 11
When the ink held at the tip comes into contact with the recording medium, it adheres to the recording medium to form a dot. Next, when the supply of image current to the electromagnet 13 is stopped after the dots are formed, the wire support 9 is returned to a predetermined position by the pressing force of the spring 10, and as the wire support 9 moves, the wire 11 is returned to a predetermined position within the holding hole 4. Also, as the wire support 9 moves back, the protrusion 9 of this
The actuator 12, one end of which is disposed between a and 9b, also returns to the predetermined position.

The wire 11 temporarily loses the ink 6 held at its tip due to the formation of dots, but
By returning to the inside, the ink 6 in the ink reservoir 5
The ink 6 gushes out from the gap between the holding hole 4 and the wire 11 to the tip of the wire 11 and causes the ink 6 to adhere to the tip again.

While the recording medium 2 is stationary and the wire holding member 3 is moved horizontally intermittently or continuously in parallel with the recording medium 2, the electromagnet 13KWJ* is
After the wire 11 is repeatedly brought into contact with and separated from the recording medium 2 by selectively supplying current to record one line of the recording medium 2, the wire holding member 3 is attached to the other end of the recording medium 2. At the same time as the recording medium 2 is returned, the recording medium 2 is moved by one line in the direction of the arrow a, and then the same recording operation as described above is repeated, thereby forming a dot-shaped image on the recording medium 2.

The wires 11 are arranged in a row in the width direction of the recording medium 2, and while the recording medium 2 is moved continuously or intermittently in the direction of the arrow a with the high-quality elephant special right β village 3 stationary, The wire 11 may be selectively brought into contact with and separated from the recording medium 2.An ink drying means 14 is provided near the recording medium 2 to dry the ink dots on the recording medium 2 recorded as described above. is located.

Embodiments of the ink drying means 14 are shown in FIGS. 2 to 9 (2), and will be described below.

The ink drying means 14 shown in FIG. 2 includes a heating element 14a disposed at a predetermined distance from the ink dot 15 side of the recording medium 2, a holder 14b holding the heating element 14a, and a heating element 14aK connected to each other. and a power supply circuit 14c. When a predetermined current is supplied to the heating element 14aK from the power supply circuit 14c, the heating element 14a radiates heat. As the recording medium 2 moves in the direction of the arrow a, the undried dots 15 formed on the recording medium 2 absorb heat radiated from the heating element 14m while passing under the heating element 14m. The solvent is vaporized and dried.

The ink drying means 14 shown in FIG.
It consists of heating elements 14a arranged on both sides, a holder 14b holding them, and a power supply circuit 14c connected to the heating elements 14ak.

The heating element 141 generates heat by the current supplied from the power supply circuit 14c. The ink dots 15 passing between these heating elements 14m are connected to the heating elements 14J.
1, the solvent is vaporized and dried.

The ink drying means 14 shown in FIG. 4 includes a lens 14d placed at a predetermined distance from the recording medium 2 placed in contact with the ink droplet l, and a light emitter placed at a predetermined distance from the lens 14d. 14e and these lenses 14
d and a holder 14b that holds the light emitter 14e, and a power supply circuit 14c connected to the light emitter 14. The light emitter 14e emits light when supplied with current from the power supply circuit 14c. The light emitted from the light emitter 14e is substantially focused onto the recording medium 2 by the lens 14d.

Ink dot 15 passing near this lens 14d
receives light from the light emitter 14e as the recording medium 2 moves in the direction of arrow a. At this time, the ink dots 15 absorb the energy of the light, vaporize the solvent, and dry.

The ink drying means 14 shown in FIG. 5 includes lenses 14d arranged at predetermined intervals on both sides of the recording medium 2, a light emitting body 1je arranged at a predetermined interval from each lens 14d, and these lenses. 14d and light emitter 14e
A power supply circuit 14c is connected to each light emitting body 14e. The light emitting body 14e emits light when current is supplied from the power supply circuit 14c. The recording medium 2 located between the two lenses 14d is moved in the direction of arrow a as the dots are formed. At this time, the dot 15 formed on the recording medium 2 passes between the two lenses 14d as it moves, and the light from the light emitter 14e that is focused by each lens 14dK is reflected therein. By absorbing light energy from both sides, the solvent is vaporized and dried.

The ink drying means 14 shown in No. 611 is Gutsuten IK! I
A large cylindrical body 14f with an open end facing the recording medium 2 placed in contact with the recording medium 2 is placed at a predetermined distance from the 1IAs body 2, and a hole 14g is formed in the upper end wall of this cylindrical body 14f. , a ventilation hole 14h is formed in the upper wall thereof, and this cylindrical body 14f
The motor 14i is disposed in contact with the upper end surface, and the rotating shaft 14 of the motor 141 is inserted through the hole 14g, and the tip 1c77 of the peak-21410 rotating shaft 14J is inserted into the hole 14g.
k, and 1. Motor 14 direct to electric l1lI circuit 14
It is made by connecting cK.

The motor 14 receives current from the electric fli circuit 14c, rotates the fan 14kik, and rotates the cylindrical body 14 in the direction of the arrow.
Move the air within 4F. The air inside this cylindrical body 14f is drawn into the ventilation hole 14 by the continuous rotation of the fan 14.
While introducing new air from h, it moves in the direction of the arrow and flows out from the opening of the cylinder 14f. At this point, as the recording medium 2 moves in the direction of the arrow a, the cylinder 14f
f) l! The ink drum (15) located below the mouth is dried by the outflow of air inside the cylinder 14f, which promotes vaporization of the ink solvent.

The ink drying means 14 shown in FIG.
g is added, and this heating element 14a is connected to a power supply circuit 14cK. A rotating shaft 14JK of the motor 14 is provided, and at the same time as the motor 14 rotates, current is supplied from the power supply circuit 14c to the heating element 14a, and the heating element 14Jl generates heat. When current is supplied from the power supply circuit 14c to the motor 14k, the fan 14k rotates and the air inside the cylindrical body 14f moves in the direction indicated by the arrow. As this air moves, new air flows out from the ventilation hole 14k. Flows into the cylinder 14f,
This new air is heated by the heating element 141 and flows out from the opening of the cylinder 14f. At this time, as the recording medium 2 moves in the direction of the arrow a, the ink dots 15 located below the opening of the cylinder 14f are exposed to high temperature air (
The ink drying means 14 shown in FIG. 14 electrodes are arranged, facing this electrode 14,
In addition, a flat electrode 14m is in contact with the back side of the recording medium 2.
It is constituted by a high-frequency heating mechanism in which a high-frequency application circuit 14n for applying a high-frequency voltage between the electrodes 14j and 14m is connected to each of the electrodes 14j and 14mKm. The above electrode 14j and electrode 1
When a high-frequency voltage is applied by the high-frequency applying circuit 14fltC between 4m, as the recording medium 2 moves in the direction of the arrow a, the ink located between the two drops (15)
Since the recording medium 2 generates heat, the solvent in the ink drum 15 evaporates due to this heat and dries.

The drying means 14 shown in the 9th wAK is provided at the tip of the wire holding member 3 so as to move integrally therewith, and has a pipe 14p with an air inlet facing toward the recording medium 2. , and a blower mechanism 14Q that sends air to the pipe 14p.

In the embodiment shown in FIG. 9, the recording medium 2 is
moved in the direction.

When the wire 11 comes into contact with and separates from the recording medium 2, the nine ink dots formed on the recording medium 2 are transferred to the pipe 14p as the recording medium 2 moves in the direction of arrow C.
This pipe 14p was moved to a position opposite to the air inlet of
in contact with the air flow sent from the At this time, the dots on the recording medium 2 are dried by promoting the vaporization of the solvent by the air flow.The ink drying means 14 is composed of a heating element 14a shown in FIG. 2 or a light emitter 14e shown in FIG. The lens 14d may be integrally provided at the tip of the wire holding member 3.

Further, the ink dryer [14 is connected to the above-mentioned recording medium 2].
An ISK heating element may be disposed within the platen 1 which is placed in contact with the platen 1, and the platen 1 may be heated to forcibly heat and dry the dots formed on the recording medium 2.

In addition, a platen IK member with high thermal conductivity is used to contact the end surface of the platen 1 on the side that does not contact the recording medium 2, and a heating element is placed in front of it at a predetermined interval. The dots formed on the recording medium 2 may be heated and dried by generating heat and transmitting the heat of this heating element to the recording medium 2 by the platen 1.

The ink drying means 14 may be configured to move in the same direction as the wire holding member 3 at a predetermined distance from the wire holding member 3 in the row direction.
Positioned in a direction perpendicular to the moving direction of the recording medium 2 as having a width equal to or greater than the width of the recording medium 2,
It may be configured such that one or more rows of valves of formed dots can be dried at the same time and a predetermined distance from the wire holding member 3 is maintained.

The wire dot printer of the present invention forcibly accelerates the evaporation of the ink solvent even when a large amount of ink adheres, so that the ink dries quickly, so the quality of the ink dots is maintained without disturbing the shape. In addition, the recording medium and other parts will not be soiled.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the wire dot printer of the present invention, FIG. 211 is a partially cutaway front view showing an ink drying means of the wire dot printer of the present invention, and FIGS. FIG. 9 is a partially cutaway front view showing another embodiment of the ink drying means of the wire dot printer;
The figure is a partially cutaway front view showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Platen, 2... Recording medium, 3... Wire holding member, 4... Holding hole, 5... Ink reservoir part, 6...
...Ink, 7...Retaining hole, 14...Ink drying means 71/8 day procedural amendment (voluntary) 10A+ days of 1986, Director Tomi Shimada Haruki 1, Indication of the incident Showa Patent Application No. 136414, year s6 1. Title of the invention: Wire dot printer 3, relationship with the case of the person making the amendment Patent applicant's address: No. 6, Nakamagome 1-3, Ota-ku, Tokyo Name (674) Stocks Company Ricoh Representative Dog breed Samurai 4, Agent 6, Contents of amendment

Claims (6)

[Claims] (1) A wire holding member that is movable relative to the recording medium, a wire held by the wire holding member and slidably disposed thereon, and a tip of the wire that faces the recording medium. an ink supply means for supplying ink to the recording medium; a drive means for bringing the wire into contact with and away from the recording medium while relatively moving the wire holding member and the recording medium; The method is characterized by comprising an ink drying means for drying the ink dots formed by the tip of the wire, and for drying the ink dots formed by the wire by contacting and separating them from the medium. Wire dot printer. (2) The wire drag printer according to claim 1, wherein the ink drying means is constituted by a heating element. (3) The wire dot printer according to claim 1, wherein the ink drying means is composed of a light emitting body. (4) The wire dot printer according to claim 1, wherein the ink drying means is constituted by an air blowing mechanism. (5) The wire dot printer according to claim 1, wherein the ink drying means is constituted by a blowing mechanism that sends hot air to the ink dots formed on the recording medium. (6) The wire dot printer according to claim 1, wherein the ink drying means is constituted by a high frequency heating mechanism.