JPS585275A - Wire dot printer - Google Patents

Abstract

PURPOSE:To prevent the drying of ink and the occurrence of blocking in the aperture between a wire and a holding hole, by providing a wire holding part near the tip facing a recording medium and also a means of interrupting the wire holding hole from the open air. CONSTITUTION:Between a wire holding part 3 and a recording medium 2, a non-impregnating dry preventive material 16 supported by a holding part 17 is provided, and an impregnating material 18 capable of imbibing water, etc., is provided inside the dry preventive material 16. When a printer is stopped, a pinion 20 is turned by a motor, etc., to lift up the holding part 17 in such a way as to cover the tip of the wire holding part 3 and a guide 4 by the impregnating material 18. Thus, the ink between the wire 11 and the holding hole 5 is interrupted from the open air and thereby the drying of the ink is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wire dot printer that makes ink attached to the tip of the wire adhere to the recording medium by bringing the wire into contact with and separating from the recording medium.

Conventionally, a holding hole is formed in a wire holding member facing a recording medium, an ink reservoir is provided that communicates with the holding hole, and a wire is slidably arranged in the holding hole and the ink reservoir.
By bringing the wire into contact with and separating from the recording medium, the ink attached to the tip of the wire is attached to the recording medium, and the same amount of ink as the amount of ink attached to the recording medium is retained from the ink reservoir. Wire dot printers are known that continuously form predetermined dots of ink by replenishing ink through a minute gap between a hole and a wire.

However, the above-mentioned wire dot printer has the disadvantage that when the printer is stopped for a long period of time (11i), the ink between the holding hole and the wire dries, and the dried ink does not maintain the formation of ink dots in a predetermined shape. .

Furthermore, if the ink dries, K may impede the sliding of the wire or cause the wire to stick to the holding hole, making it difficult to restart.

The object of the present invention is to provide a device that does not allow the ink between the holding hole and the wire to dry even if it is stopped for a long period of time, is easy to restart, and has a predetermined shape. It is an object of the present invention to provide a wire dot printer in which the formation of ink dots is well maintained.

The present invention provides a method for preventing ink from drying in the gap between the wire and the holding hole in a wire dot printer in which the ink attached to the tip sK of the wire is attached to the recording medium by bringing the wire into contact with and separating from the recording medium. It is characterized by the provision of clogging prevention means.

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

In FIG. 1, reference numeral 1 indicates a platen, and a recording medium 2 is arranged so as to be in contact with this platen IK. A wire holding member 3 is arranged opposite the recording medium 2. A guide 4 is provided on the front end surface of the wire holding member 3 facing the recording medium 2.
A holding hole 5 is formed in the holder. An ink reservoir 6 is formed in communication with the holding hole 5 of the guide 4, and an ink impregnated material 1 made of felt is placed inside the ink reservoir 6. This ink reservoir 6 is communicated with an ink tank 8 through a pipe 8aK.

This ink tank 8 contains ink 9, and this ink 9 is supplied to the ink reservoir 6 through a pipe 8.

A holding hole 1o is formed in the wall of the wire holding member 3 facing the wall on which the guide 4 is provided, and a holding hole 1o is formed between the holding hole 5 formed in the guide 4, the ink-impregnated material 7, and this holding hole 10. A wire 11 is arranged so as to be inserted and slidable therethrough. The wire holding member 3 is reciprocated horizontally intermittently or continuously.

The rear end of the wire 11 is connected to the upper end of the actuator 12. This actuator 12 is the support shaft 1
A tension spring 14 is connected to the lower end of the actuator 12.

Electromagnets 15 are arranged at predetermined intervals on the side of the recording medium 2 of the actuator 12.
By supplying an image current to actuator 1
2 is attracted to the electromagnet 15 against the tensile force of the spring 14. The actuator 12 rotates around a support shaft 13, and the wire 11 is pushed by the actuator 12 and moves to come into contact with the recording medium 2 and cause the ink attached to the tip surface to adhere to the recording medium 2. Form a dot. Next, when the supply of -1 current to the electromagnet 15 is stopped, the actuator 12 rotates due to the tensile force of the spring 14, the wire 11 is separated from the recording medium 2, and the tip of the wire 11 is transferred to the wire holding member 3. Return within.

With the recording medium 2 stationary, the wire holding member 3 is moved intermittently or continuously in the horizontal direction, and the driving means selectively brings the wire 11 into contact with and away from the recording medium 2 repeatedly. After recording one line of the medium 2, the wire holding member 3 is returned to the other end of the recording medium 2, and the recording medium 2 is moved up or down by one line, and then the same procedure as described above is performed. The drumming motion is repeated.

Note that moving the recording medium 2 intermittently or continuously,
A plurality of wires 11 may be arranged in a stationary state in one or more rows in a direction perpendicular to the moving direction of the recording medium 2.

A clogging prevention means is provided between the wire holding member 3 and the recording medium 2. A non-impregnable drying prevention member 16 is arranged between the wire holding member 3 and the recording medium 2, and this drying prevention member 16 is held by a holding member 17. Further, inside the drying prevention member 16, #! As shown in FIG. 2, an impregnation member 18 is provided, and this impregnation member 18 is always impregnated with an organic solvent, water, or the like.

\, A rack s19 is formed on the holding member 17,
. A binion 20 is arranged to mesh with this rack portion 19. The holding member 17 is raised or lowered by rotation of the pinion 20.

The impregnating member 18 disposed inside the drying prevention member 16 held by the holding member 17tC can slide against the front end surface of the wire holding member 3 facing the recording medium 2 as the holding member 17 moves. It is located in When the wire 11 is stopped in the wire holding member 3 , the impregnated member 18 touches the guide 4 and the distal end surface of the wire holding member 3 facing the recording medium 2 due to the upward movement of the holding member 17 . Therefore, the ink present between the wire 11 and the holding hole 5 is shielded from the outside air by the impregnation member 18 and the solution impregnated therein, and is prevented from drying even when the wire 11 is stopped for a long period of time.

The impregnating member 18 may be made of felt, porous resin, sponge, porous rubber, wood, cloth, fiber, or the like as an impregnating member.

Regarding the 200 rotations of the pinion for raising or lowering the impregnation member 18, the pinion 20 may be rotated by the motor after the recording operation of the wire 11 has stopped, or manually after the recording operation of the wire 11 has stopped. The pinion 20 may also be rotated.

Another embodiment of the clogging prevention means in the wire dot printer of the present invention is shown in FIG. 3 and will be described next.

An adapter 21 is disposed on the front end surface of the wire holding member 3 facing the recording medium 2 in contact with the front end surface of the wire holding member 3.
A passage hole 22 is formed through which the passage hole 22 passes. Furthermore, a cavity 23 is formed between the adapter 21, the distal end surface of the wire holding member 3, and the guide 4. Above adapter 21
A passage hole 24 is formed in the end face opposite to the face in contact with the wire holding member 3 .

The recording medium 2 is inserted into the adapter 21 from the cavity 23.
Another cavity 25 is formed on the side 5.

Furthermore, a pipe 26 communicating with a cavity 25 is provided at the lower end of the adapter 21, and this cavity 25 is always filled with a high boiling point organic solvent 27 through the pipe 26. The wire 11 passes through the organic solvent 27 filled in the cavity 25 and forms a predetermined dot of ink by contacting and separating from the recording medium 2. The solvent 27 forms a film portion 27 in the passage hole 22 and the passage hole 24 formed in the adapter 21 due to the surface tension of the organic solvent 27 itself, and does not provide resistance to the passage of the wire 11. . Furthermore, this film portion 271 is a hollow portion 2 provided between the adapter 21 and the wire holding member 30 when the wire 11 does not come into contact with or separate from the recording medium 2 .
3 and the outside air, and prevents the ink from drying by separating the ink solution 11 between the wire 11 and the holding hole 5 from vaporizing only in the cavity 23. .

The wire dot printer of the present invention is suitable for long-term downtime.
Even when the ink is in contact with the holding hole, the ink does not dry out, restarting is easy, and the formation of dots in a predetermined shape is well maintained.

[Brief explanation of the drawing]

FIG. 2 is a partially cutaway front view showing an embodiment of the wire dot printer of the present invention, FIG. FIG. 3 is a partially cutaway front view showing clogging prevention means of the wire dot printer of the present invention.

Claims (1)

[Claims] A holding hole is formed at the tip of the wire holding member facing the recording medium KQ, an ink reservoir is provided that communicates with the holding hole, and a wire is slidably arranged in the ink reservoir and the holding hole. In a wire dot printer that makes contact with and separates from a recording medium by sliding back and forth and causes ink attached to the tip of the wire to adhere to the recording medium to form an ink dot, the wire is located at 11 between the wire and the holding hole. A wire dot printer characterized by being provided with clogging prevention means to prevent ink from drying.