JPH07121603B2 - Printer carriage support shaft mounting mechanism - Google Patents

Description

DETAILED DESCRIPTION [Outline] A carriage support shaft mounting mechanism for adjusting a mounting state of a carriage supporting shaft that supports a carriage of a printer, and a carriage supporting shaft that can be accurately and easily adjusted. Is connected to the end of the carriage support shaft that slidably supports the carriage on which the print head is mounted, and is movably arranged along the printer frame in the direction perpendicular to the axis of the carriage support shaft. A shaft support, and guide means for guiding the shaft support so as to be movable in only one direction along the frame,
A driver receiving hole formed in the frame for swingably receiving the driver in the direction, and a driver engaging portion formed in the shaft support so as to engage with the driver inserted in the driver receiving hole. And a fixing means for fixing the shaft support to the frame.

[Industrial application field]

The present invention relates to a carriage support shaft mounting mechanism for adjusting a mounting state of a carriage support shaft that supports a carriage of a printer.

If the carriage support shaft that supports the carriage is inclined with respect to the platen, the distance between the print head and the platen changes as the carriage moves along the carriage support shaft. Then, when printing is performed at high speed, the printing quality may be extremely deteriorated, resulting in defective printing. Therefore, as the printing speed becomes faster, it is necessary to strictly adjust the mounting state of the carriage support shaft that supports the carriage.

[Conventional technology]

4 and 5 show a conventional carriage support shaft mounting mechanism of a printer, and 51 is a carriage support shaft that supports a carriage. 52 is a printer frame, and the carriage support shaft 51 is a shaft support 53.
Supported by. The shaft support 53 is a frame
The hole 54 is fitted in a hole 54 formed in the hole 52, but the hole 54 is eccentric to the carriage supporting shaft 51.

Therefore, the shaft support 53 is fitted in the hole 54.
When is rotated, the carriage support shaft 51 is displaced, and the parallelism of the carriage support shaft 51 with respect to the platen can be adjusted.

In order to perform such adjustment work with a general-purpose plus driver, conventionally, as shown in FIG. 5, a liquid pawl 55 is formed at the edge of the shaft support 53, When the tip of the driver is inserted into the driver receiving hole 56 formed in 52 and rotated, the claw 55 rotates around the hole 54, whereby the carriage supporting shaft 51
Is designed to be displaced. 57 is a fixing screw for fixing the shaft support 53 to the frame 52 after the adjustment is completed.

[Problems to be Solved by the Invention]

When the adjustment work is performed in the above-described conventional carriage support shaft attachment mechanism, the locus of the carriage support shaft 51 becomes an arc that rotates around the center of the hole 54, as shown by arrow A.

Therefore, to approach or retract the platen,
If the carriage support shaft 51 is moved in the Y direction, the carriage support shaft 51 also moves in the X direction at the same time, and the carriage tilts with respect to the platen. Then, no matter how much the carriage support shaft 51 is adjusted so as to be parallel to the platen in the Y direction, the gap between the print head and the platen may be misaligned due to the displacement in the X direction, resulting in defective printing. It was

SUMMARY OF THE INVENTION It is an object of the present invention to provide a carriage support shaft mounting mechanism for a printer, which eliminates the above-mentioned conventional drawbacks and can accurately and easily adjust the mounting state of the carriage support shaft.

[Means for Solving the Problems]

In order to achieve the above object, the carriage supporting shaft mounting mechanism of the printer of the present invention slidably supports the carriage 2 having the print head 1 mounted thereon, as shown in FIG. 1 for explaining the embodiment. A shaft support 5 connected to an end of the carriage support shaft 3 and movably arranged along a frame 4 of the printer in a direction perpendicular to the axis of the carriage support shaft 3, and the shaft support 5. Guide means 6 and 7 for guiding the frame 4 so as to be movable in only one direction Y, and a driver receiving hole 8 formed in the frame 4 for swingably receiving the driver in the direction Y. The driver engaging portion 9 formed on the shaft support 5 so as to engage with the driver inserted into the driver receiving hole 8 and the shaft support 5 And having a securing means 10 for securing to the frame 4.

[Action]

When a general-purpose driver is inserted into the driver receiving hole 8 and is rocked, the shaft support 5 engaged with the driver is guided by the guide means 6 and 7 to move only in one direction Y. When the adjustment is completed, the shaft support 5 is fixed to the frame 4 by the fixing means 10, and the adjusted state is maintained.

〔Example〕

 An embodiment will be described with reference to the drawings.

In FIG. 1, 11 is a platen. 100 is printing paper. Two
Is a carriage that carries the print head 1 and moves along a carriage support shaft.

The carriage support shaft 3 is attached to the frame 4 of the printer via a shaft support 5. This part will be described with reference to FIG. 2 which is a sectional view taken along the line II-II.

The shaft support 5 is connected to an end portion of the shaft of the carriage support shaft 3 and is movably attached along the outer surface of the frame 4 in a direction perpendicular to the shaft of the carriage support shaft 3. However, a pair of large and small projections 6a, 7a protruding from the shaft support 5 to the frame 4 side,
The oval guide holes 6 and 7 formed in the frame 4 are engaged with each other.

The two long holes 6 and 7 are straight in the longitudinal direction of the platen 1
It is formed along the Y direction toward 1. Therefore, the shaft support 5 cannot move in the X direction, but can move only in the Y direction that approaches or moves away from the platen 11.

The frame 4 is provided with a driver receiving hole 8 into which the tip portion of a general-purpose plus driver is fitted and which can swing the plus driver with the tip portion as a fulcrum. Further, the shaft support 5 has a driver receiving hole 8
A driver engagement hole 9 is formed in which a plus driver whose tip is inserted engages. As shown in FIG. 2, a pair of left and right protrusions 9a having a shape to be fitted in the groove at the tip of the plus driver are formed in the driver engagement hole 9 so as to face inward.

Therefore, as shown in FIG. 3, the tip of a general-purpose plus driver 90 can be inserted into the driver receiving hole 8 so that the protrusion 9a of the driver engaging portion 9 can be engaged with the groove of the plus driver 90, and When the driver 90 is swung in the substantially Y direction, the shaft support 5 is moved accordingly.
Move along. However, since the movement direction of the shaft support 5 is restricted by the guide holes 6 and 7, it is possible to accurately measure Y.
The carriage support shaft 3 moves toward or away from the platen 11 by moving only in the direction.

Reference numeral 10 denotes a fixing screw for fixing the shaft support 5 to the frame 4, which can be tightened with a Phillips screwdriver after the adjustment is completed. The through hole 10a formed in the shaft support 5 for passing the fixing screw 10 is also formed in an oval shape having the Y direction as the longitudinal direction, and the movement of the shaft support 5 in the Y direction is fixed by the fixing screw. 10 is set to not interfere.

The shaft supports 5 are provided on the left and right of the printer, and by adjusting both of them, the print head 1
The distance between the platen 11 and the platen 11 can be kept constant.

Although a general-purpose plus driver is used as the tool in the above embodiment, a minus driver may be used. In that case, the shapes of the driver receiving hole 8 and the driver engaging portion 9 are both minus. It may be formed to fit the driver.

〔The invention's effect〕

According to the carriage support shaft mounting mechanism of the printer of the present invention, when adjusting the mounting state of the carriage support shaft, the carriage support shaft can be moved only in the direction necessary for the adjustment. Can be performed accurately and easily, and good printing quality can be obtained even in high-speed printing.

Moreover, since the adjustment can be performed by a general-purpose driver, no special tool is required, and the adjustment work can be performed extremely easily.

[Brief description of drawings]

 FIG. 1 is a front partial sectional view of the embodiment, FIG. 2 is a side partial sectional view of the embodiment, FIG. 3 is an adjustment work drawing of the embodiment, FIG. 4 is a front partial sectional view of a conventional example, and FIG. [Fig. 6] is a side view of a conventional example. In the figure, 1 ... Print head, 2 ... Carriage, 3 ... Carriage support shaft, 4 ... Frame, 5 ... Shaft support, 6 ... Guide hole (guide means), 7 ... Guide hole (guide) Means), 8 ... driver receiving hole, 9 ... driver engaging portion, 10 ... fixing screw (fixing means).

Claims (1)

[Claims] 1. A direction perpendicular to an axis of a carriage support shaft (3), which is connected to an end of a carriage support shaft (3) slidably supporting a carriage (2) having a print head (1) mounted thereon. And a shaft support (5) movably arranged along the frame (4) of the printer, and the shaft support (5) can be moved only in one direction (Y) along the frame (4). Guide means (6, 7) for guiding the driver and a driver receiving hole (8) formed in the frame (4) for swingably receiving the driver in the direction (Y).
A driver engaging portion (9) formed on the shaft support (5) so as to engage with a driver inserted in the driver receiving hole (8), and the shaft support (5) on the frame. A carriage support shaft mounting mechanism for a printer, comprising: a fixing means (10) for fixing to (4).