KR950008979Y1 - Ink jet head capping device - Google Patents

Abstract

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Description

Head capping device of ink jet printer

1 is a schematic view showing a conventional apparatus.

Figure 2 is an exploded perspective view of the device of the present invention.

3 is a plan view of the coupled state of FIG.

A-c of Figure 4 is an operating state of the device of the present invention.

* Explanation of symbols for main parts of the drawings

11 motor 13 lead screw

19: power transmission clutch 20: gear clutch

19a, 20a: protrusion 23: axis

27: cam 28: louver plate

29: louver cap 30: stopper

30a: jamming jaw

The present invention relates to a head capping device of an ink jet printer that prints by ejecting ink. More specifically, the head surface is cleaned and capped after printing to evaporate and solidify the ink. Hardening) to prevent the ink nozzles from clogging.

In general, an ink jet printer is a printer for ejecting and printing ink, which prevents the ink nozzles from being clogged by evaporation and solidification of the ink in the head when it is not used for a long time, and at the same time periodically wipes the ink stuck on the head surface. The installation of a capping device for the wagering is required.

In the conventional capping apparatus, as shown in FIG. 1, the louver cap 2 is fixed to one side of the frame 1 so that the head 3 is rotated by the lead screw 4 after the printing is completed. As it moves toward the louver cap 2 side, the surface of the head 3 is connected to the louver cap 2 so as to block air and prevent the ink in the ink nozzles from drying out.

However, such a conventional device has a head surface when the head 3 is moved toward the louver cap 2 so that the louver cap 2 is fixed to one side of the frame 1 so that the head surface is connected to the louver cap 2. When the head 3 is moved to the louver cap 2 in order to be connected with the louver cap 2, the head surface collides with the louver cap 2 and is damaged, and the user is in contact with the head part. Since the head 3 is frequently separated from the louver cap 2 when it is touched or the power is turned off, the head surface is exposed to air and the ink dries.

The present invention has been made in order to solve such a problem in the prior art, the purpose is to be able to remove the ink on the head surface and capping at the same time as the head is transferred to one side in the state where the printing is completed.

Still another object of the present invention is to prevent the head from flowing while capping the head surface.

According to a form of the present invention for achieving the above object, the clutch means for transmitting the operation of the motor, the capping means fixed to the shaft to be rotated by the clutch means, the head surface is capped by the capping means A head capping device for an ink jet printer is provided, which is configured with clamping means for controlling the transfer of the head in a state.

Hereinafter, the present invention will be described in more detail with reference to FIGS. 2 to 4 of the accompanying drawings.

2 is an exploded perspective view of the device of the present invention, and FIG. 3 is a plan view of the coupled state of FIG. 2, and the rotational force may be transmitted to the lead screw 13 through the pinion 12 according to the driving of the motor 11. The coupling pin 18 is fixed to the carrier 17 to which the timing belt 15 is wound and the head 16 is fixed between the pinion 12 and the drive gear 14 fixed to the lead screw 13. The coupling pin 18 is inserted into the groove of the lead screw 13 so that the carrier 17 moves to the left and right in the drawing as the lead screw 13 rotates.

And a clutch means for transmitting power to one side of the recessed groove (13a) formed in the lead screw 13, which is provided with a projection (19a) on one side of the recessed groove (13a) of the lead screw (13). The power transmission clutch 19 is slidably installed, and on one side thereof, the gear clutch 20 having the projection 20a is elastically installed to be idle by an elastic member such as a spring 21, and on one side thereof, the gear clutch is provided. A stopper pin 22 for preventing detachment of the 20 is fixed.

At this time, the power transmission clutch 19 is coupled to the cutting surface of the lead screw 13 so that the sliding movement is possible at the same time as the rotation.

On the other hand, the gear clutch 20 is engaged with the shaft 23 for rotating the capping means and the clamping means, the driven gear 24 and the idle gear 25 fixed thereto, and the recessed groove 13a of the lead screw 13. In the lower part, the sensor 26 is installed to control the driving of the motor 11 as the head 16 moves.

In addition, the capping means fixed to the shaft 23 to cap the surface of the head 16 is fixed to the insertion hole (27a) formed in the cam 27, the louver plate 28 on the rotation direction side of the cam 27 And the lower portion of the louver cap 29 is fixed so that the louver plate 28 removes the ink stuck on the head surface, and the louver cap 29 caps the head surface.

At this time, the cam 27 is formed so that its length (L ') becomes longer as it goes to the rear side than the length (ℓ) on the rotational side, which is the louver cap (29) after the louver plate (28) removes ink This is to ensure that the surface can be capped more securely.

In addition, as a clamping means for preventing the head 16 from flowing in the lead screw 13 in a state in which the capping means caps the head surface, a stopper 30 having a locking jaw 30a toward one side of the capping means. Is fixed to the shaft 23 so that the locking jaw 30a is connected to one side of the head 16 while the head surface is capped by the capping means to prevent the head 16 from being moved by an external force. It is.

At this time, the stopper 30 is located in line with the louver cap 29 fixed to the cam 27.

Referring to the effect of the present invention configured as described above are as follows.

First, the head 16 fixed to the carrier 17 in the "S" section of FIG. 3 by the forward and reverse of the motor 11 performs a linear reciprocating motion along the lead screw 13, similar to a conventional printer. Print the manuscript.

Then, when ink flows and forms on the surface of the head 16 by printing several lines on the original, the motor 11 continues to move the carrier 17 to the right in the drawing by a separate driving circuit. A forward rotation will be made.

Accordingly, the coupling pin 18 is inserted from the groove of the lead screw 13 into the recess groove 13a, and at the same time, the sensor 26 installed below the recess groove 13a detects the motor 11 to fix the motor 11. The staff will rotate.

Thus, when the carrier 17 is moved to the right in the drawing and the coupling pin 18 is fitted into the recessed groove 13a, one side of the carrier 17 is transferred together while being connected with the power transmission clutch 19 to transmit power. The clutch 19 is connected to the gear clutch 20 while compressing the spring 21 so that the projections 19a and 20a formed on each clutch are engaged.

Accordingly, as the lead screw 13 is rotated counterclockwise by the motor 11, the rotational force is transmitted to the driven gear 24 through the gear clutch 20 and the idle gear 25, so that the shaft 23 is half. Rotate clockwise.

As shown in a of FIG. 4, as the cam 27 is rotated counterclockwise, the louver plate 28 fixed to the cam 27 is connected to the surface of the head 16 and b and is formed on the head surface. As the motor 11 rotates in the reverse direction while removing the ink, the coupling pin 18 can be pulled out into the recess 13a to continue printing.

On the other hand, when the capping of the head surface is completed after the printing, the same operation as described above is performed, in which case the motor 11 rotates slightly more by the driving circuit than when the motor 11 removes ink stuck on the head surface. Therefore, while the louver plate 28 wipes off the ink formed on the head surface, the rotation of the cap 27 is stopped while the louver cap 29 is connected to the head surface.

When the operation as described above, the length (L ') is longer toward the rear than the length (ℓ) of the rotation direction side of the cam 27, so that the louver cap 29 is in close contact with the head surface more closely Lose.

As the louver cap 29 is in close contact with the head surface as described above, the locking jaw 30a of the stopper 30 positioned in line with the louver cam 29 is connected to one side of the head 16 as in c. Even when the user malfunctions the device inadvertently, the head 16 is moved along the lead screw 13 to prevent the head surface and the louver cap 29 from being separated from each other.

Then, if you want to print on the original again, it is possible by rotating the motor 11 to disengage the engaging pin 18 from the inlet groove 13a. Accordingly, the driven gear 24 is also provided by the clutch means. Since the reverse rotation, the locking step 30a of the stopper 30 is released from the side of the head 16, the eye becomes possible.

At this time, in order to maintain the initial state as shown in the reverse rotation amount of the capping means and the clamping means, that is, as shown in a of FIG. It becomes possible by setting the length of (19a) (20a) suitably.

As described above, the power of the motor 11 is transmitted to the cam 27 by the clutch means, so that ink stuck to the head surface can be removed or capped, thereby preventing ink build-up of the head, thereby maintaining a clean printing state. In addition to being able to maintain it, it also prevents the head from colliding with the louver, thereby extending the life of the head.

On the other hand, when the louver cap 29 is connected to the head surface, the stopper 30 prevents the flow of the head 16, so that the ink nozzle can be prevented from being closed due to the exposure of the head surface. Will also have.

Claims (5)

Clutch means for transmitting the power of the motor 11, capping means fixed to the shaft 23 so as to be rotated by the clutch means, and the movement of the head in the state that the head surface is capped by the capping means An ink jet printer comprising a clamping means for the head cap capping device. The clutch clutch (20) according to claim 1, wherein the clutch means slidably installs the power transmission clutch (19) having the projection (19a) on one side of the lead screw (13) and the projection (20a) on the one side thereof. And the capping means and the clamping means are rotated as the protrusions (19a) (20a) of the clutch engage with each other. The head capping device of an ink jet printer according to claim 1, wherein the capping means fixes the louver plate (28) to the rotational side of the cam (27), and secures the louver cap (29) to the bottom thereof. 4. The head capping apparatus for an ink jet printer according to claim 3, wherein the length (L ') of the cam (27) on the rotational side side is made long. 2. The clamping means according to claim 1, wherein the clamping means has a stopper 30 having a locking jaw 30a on one side of the capping means on the shaft 23 to block the head surface by the capping means. A head capping device for an ink jet printer adapted to be connected to one side of a head (16).