JPH11254715A - Head position-adjusting mechanism and line printer with the mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate positional adjustment of a line-recording head to a platen by setting a movement adjustment means which adjusts to move a recording face of the line-recording head in parallel to the platen when the line-recording head is to be adjusted in position to make each heat-generating element pressed in touch with the platen. SOLUTION: In adjusting a line-recording head 9 in position, a reference positioning groove of a side plate 3 is fitted in a position adjustment jig thereby setting a reference position. A platen 4 is detached thereafter. Since the position adjustment jig corresponds to a position of the platen 4, the head 9 can be adjusted in position to the platen 4 to make each heat-generating element pressed in touch with the platen if a position of the head 9 is adjusted on the basis of the position adjustment jig. Specifically, when a line connecting each heat-generating element of the head 9 does not overlap with a rotational axis of the platen 4, an eccentric member loosely fitted in a head position adjustment groove is rotated with the use of a driver, thereby moving the head 9. The line connecting each heat-generating element of the head 9 is thus adjusted to overlap with the rotational axis of the platen 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head position for adjusting a position of a line recording head in which a plurality of heating elements are arranged and arranged in a direction orthogonal to a recording paper conveying direction so that each heating element is pressed against a platen. The present invention relates to an adjustment mechanism and a line printer including the adjustment mechanism.

[0002]

2. Description of the Related Art Conventionally, a long line recording head having one row of heating elements in a direction perpendicular to a recording paper conveyance direction is pressed against a platen via an ink sheet and recording paper to generate each of the above-described heat generation. There has been proposed a line printer that performs recording on the recording paper by causing elements to generate heat.

[0003] Such a conventional line printer will be described with reference to FIG.

FIG. 5 is a side view showing a configuration of a main part of a conventional line printer in a head down state. A cylindrical platen 60 is rotatably disposed in a printer main body (not shown). A long head mounting table 62 is disposed above the platen 60 in parallel with the rotation axis of the platen 60, and a long line recording head 63 has a recording surface on the head mounting table 62. It is mounted so as to face the platen 60.

[0005] The line recording head 63 can be freely moved toward and away from the platen 60 by swinging operation of the head mounting table 62 by a pressing mechanism (not shown). The position where the line recording head 63 is in contact with the platen 60 in the head down state is the recording position.

[0006] A recording paper 64 and an ink sheet 65 are supplied between the platen 60 and the line recording head 63. This recording paper 64
Is driven in the direction of arrow A in FIG. 5 by a paper feed mechanism (not shown).

On the other hand, the ink sheet 65 is composed of the platen 60 and the recording paper 64 of the line recording head 63.
Are wound around the outer peripheral surfaces of a pair of rollers 66, 66 arranged outside in the traveling direction of the roller. This pair of rollers 6
6, 66 are formed in a substantially cylindrical shape, and one of these rollers 66, 66 located on the upstream side in the transport direction from the recording position is a delivery roller 66a for delivering the ink sheet 65. The other, which is located further downstream in the transport direction, is a take-up roller 66b that takes up the ink sheet 65 of the portion used for recording.

Each time one row of the recording paper 64 has been recorded, the take-up roller 66b is driven to rotate, and a back tension is applied by the delivery roller 66a so that the ink sheet 65 is transferred to the recording paper 64. In the same direction as the traveling direction, and is wound around the winding roller 66b.

In such a conventional line printer 1, the ink sheet 65 and the recording paper 64 are supplied between the line recording head 63 and the platen 60, and the head mounting table 62 is moved by the pressing mechanism. The line recording head 63 is pressed against the platen 60 by swinging toward the platen 60, whereby the line recording head 63 is sandwiched between the line recording head 63 and the platen 60.

The recording paper 64 is conveyed at a desired speed by a paper feed mechanism (not shown), and while the ink sheet 65 is wound by the winding roller 66b, the line recording head 6 is moved based on a desired recording signal.
By selectively causing the plurality of heating elements to generate heat,
The ink on the surface of the ink sheet 65 is applied to the recording paper 64
And transfer recording.

When color recording is to be performed on the recording paper 64, the ink sheet 65 having cyan, magenta, yellow, and black inks is used, and the recording using the cyan ink is performed on the recording paper 64. After the recording is performed on the entire surface, the recording paper 64 is conveyed backward by the paper feed mechanism and returned to the first recording position, and then recording is performed with the next magenta ink so that the final color recording is completed. Has become.

[0012]

However, in the conventional line printer, a columnar platen 60 is used as the platen 60 instead of the platen platen 60. This is because the paper feed resistance can be reduced, but on the other hand, there is a problem that it is difficult to adjust the position of the line recording head 63 with respect to the platen 60.

That is, since the columnar platen 60 and the line recording head 63 are in line contact with each other, for example, each heating element of the line recording head 63 is moved with respect to the rotation axis of the platen 60. If the line recording head 63 is displaced and intersects, or if it does not intersect, it is displaced in the conveying direction of the recording paper 64, the line recording head 63 cannot be pressed against the platen 60,
There is a problem that the ink is not transferred to the recording paper 64.

In order to solve such a problem, in a conventional line printer, at the assembling stage, a special jig and a light measuring device or the like (neither is shown) are used to form all of the line recording head 63. Of the platen 60
The position was adjusted so as to be pressed against.

However, such a head position adjusting means involves cumbersome operations such as preparing a special jig, and it is difficult to make fine adjustments.

The present invention has been made in view of the above-mentioned problems, and a head position capable of easily adjusting the position of a line recording head with respect to a platen with a simple configuration and improving recording accuracy. An object of the present invention is to provide an adjustment mechanism and a line printer including the adjustment mechanism.

[0017]

According to a first aspect of the present invention, there is provided a head position adjusting mechanism for moving a recording surface of a line recording head in parallel with a platen. It has a movement adjusting means for adjusting. By adopting such a configuration, the position of the line recording head with respect to the platen can be easily adjusted with a simple configuration, and the recording accuracy can be improved.

The head position adjusting mechanism according to a second aspect is characterized in that, in the first aspect, the line recording head is fixed to a head mount, and a head position adjusting groove is formed in the head mount. The movement adjusting means pushes the side surface of the head position adjusting groove to move the recording surface of the line recording head together with the head mounting base. By employing such a configuration, the position of the recording surface of the line recording head can be finely adjusted with respect to the platen only by pushing the head position adjusting groove of the head mount.

Further, a feature of the head position adjusting mechanism according to the third aspect is that, in the second aspect, the movement adjusting means is provided with:
A plurality of eccentric members for head position adjustment are provided which are eccentrically rotated within the head position adjustment groove and push the side surfaces of the head position adjustment groove. By adopting such a configuration, the position of the line recording head can be finely adjusted simply by selectively rotating the plurality of eccentric members for head position adjustment.

The head position adjusting mechanism according to a fourth aspect is characterized in that, in the third aspect, the head mounting base is fixed to a heat radiating plate, and the head position adjusting eccentric member is arbitrarily attached to the heat radiating plate. The point is that a head position adjusting hole for eccentric rotation is formed so as to communicate with the head position adjusting groove. And, by adopting such a configuration, the head position adjusting hole can be eccentrically rotated while the head mounting base is fixed to the heat sink, so that the position adjustment of the line recording head can be more reliably performed and the accuracy is improved. it can.

According to a fifth aspect of the present invention, a line printer is provided with the head position adjusting mechanism according to any one of the first to fourth aspects. By adopting such a configuration, the position of the line recording head can be easily adjusted, and the recording accuracy can be improved.

A feature of the line printer according to the sixth aspect is that, in the fifth aspect, the platen is detachably supported on a side plate. By adopting such a configuration, the position adjustment and confirmation of the line recording head can be easily performed without the platen.

[0023]

1 to 4 show an embodiment of a line printer provided with a head position adjusting mechanism according to the present invention.
This will be described with reference to FIG.

FIG. 1 is a perspective view showing an essential part of the line printer 1. A pair of side plates 3 are fixed to right and left sides of a substantially flat substrate 2 so as to extend upward at right angles. And so on.

A cylindrical platen 4 is rotatably supported on the side plate 3 and can be removed freely. Further, as shown in FIG. 2, a reference positioning portion 5 extends downward from a lower edge of the side plate 3 located directly below the support position of the platen 4, and a lower edge of the reference positioning portion 5 is provided. , A reference positioning groove 6 is formed in a concave shape. When adjusting the head position, the reference positioning groove 6 is engaged with a position adjustment reference jig (not shown) serving as a reference for position adjustment instead of the platen.

The substrate 2 is located above the platen 4.
The line recording head 8 which is long in the width direction of the platen 4
Are disposed so as to extend in parallel with the rotation axis of A plurality of heating elements (not shown) are formed in the line recording head 8 in a direction orthogonal to a conveying direction of a recording paper (not shown), and selectively generate heat based on a predetermined recording signal. It has become so.

As shown in FIG. 3, the line recording head 8 is longer than the line recording head 8 and is fixed to a flat head mounting base 9. The head mounting base 9 is mounted on one long portion of a heat sink 10 having a substantially E-shaped plane. The heat sink 10 is made of a material having a high thermal conductivity such as aluminum.
Assuming that a long portion on which the head mounting base 9 is mounted is a mounting part 10a, heat of the heating element of the line recording head 8 is transmitted to the mounting part 10a via the head mounting base 9, and The heat is transferred to the other long radiating portion 10c via the connecting portion 10b extending at a right angle from the side surface of the mounting portion 10a, so that the heat is radiated by the entire radiating plate 10. I have.

The connecting portion 10b is formed with a step in the vertical direction to form a space on the lower surface side of the heat radiating portion 10c. A cooling fan (not shown) is provided to It is designed to cool down.

A head position adjusting groove 12 is formed on the upper surface of the head mounting table 9 in a concave shape along the longitudinal direction of the head mounting table 9, near the end of the head position adjusting groove 12. , Two head position adjusting eccentric members 13 are loosely fitted. As shown in FIG. 4, the head position adjusting eccentric member 13 is formed with a disk-shaped eccentric rotating portion 13a, which is located on the upper surface of the eccentric rotating portion 13a and shifted from the center axis. Cylindrical adjusting unit 13b
Is protruding. The adjusting portion 13b is formed with a rotating groove 13c that is orthogonal to the vertical and horizontal directions, so that a Phillips screwdriver or the like can be engaged.

On the other hand, two head position adjusting holes 14 are formed in the mounting portion 10a of the heat radiating plate 10 near the longitudinal end of the mounting portion 10a. The adjusting portion 13b is loosely fitted.

For this reason, a phillips screwdriver or the like is inserted through the head position adjusting hole 14 of the heat sink 10 to rotate the rotary groove 13c of the adjusting portion 13b of the eccentric member 13 for adjusting the head position.
And can be rotated.

By rotating the adjusting portion 13b, the eccentric rotating portion 13a rotates eccentrically with the adjusting portion 13b as an eccentric axis, and the side surface of the eccentric rotating portion 13a adjusts the head position of the head mounting base 9. The side surface of the groove 12 is pushed to move the recording surface 8a of the line recording head 8 together with the head mount 9 to the front and rear sides in a direction perpendicular to the recording paper conveyance direction with respect to the platen 4. ing.

Therefore, by rotating one or both of the two head position adjusting eccentric members 13, the position can be adjusted so that all the heating elements of the line recording head 8 are pressed against the platen 4. ing.

Further, a fixing screw hole 15 is formed in the bottom surface of the head position adjusting groove 12 of the head mounting base 9, and an oval-shaped fixing insertion hole is formed in the mounting portion 10 a of the heat sink 10. A hole 16 is formed, and the position of the line recording head 8 is adjusted by the eccentric member 1 for head position adjustment.
After the adjustment by 3, the fixing screw 18 is screwed into the fixing screw hole 15 through the fixing insertion hole 16 to fix the head mount 9 and determine the position of the line recording head 8. Has become.

The platen 4 can be removed even when the head mount 9 is provided, so that each heating element of the line recording head 8 can reliably press against the platen 4. Confirmation and adjustment of the position can be performed with the platen 4 removed.

When each heating element of the line recording head 8 is slightly displaced with respect to the platen 4 in a direction perpendicular to the recording paper conveying direction, the recording accuracy is hardly affected. Therefore, the displacement is adjusted by adjusting the fixing position of the fixing screw 18 with respect to the oval fixing insertion hole 16 of the heat sink 10.

On the other hand, a pair of head transfer members 19, 19 are mounted inside the side plates 3 so as to be vertically swingable about a swing shaft 20 at the base end thereof. On one side of each of the head transfer members 19, head press-contact members 22, 22 are attached so as to be vertically swingable about the swing shaft 20, respectively. A head pressure spring 23 is interposed between the head pressure member 22 and the tip of the head pressure member 22. Also,
At the tip of the head transfer member 19, the heat sink 1
Both end portions of the mounting portion 10a are fixed.

A head up / down motor 24 is provided on one side plate 3, and an output gear 25 of the head up / down motor 24 is rotated forward / reverse by the forward / reverse rotation of the head up / down motor 24. The head position switching transmission gear 26 is engaged. The head position switching transmission gear 26 is coaxially provided with a head position switching swing gear (not shown) that rotates integrally with the head position switching transmission gear 26. The rocking plate 28 for switching the head position
Are provided so as to be swingable about the rotation axis of the head position switching swing gear. A head-down gear 29 and a head-up gear (not shown) meshed with the head-position switching rocker are rotatably mounted on the head-position switching rocker 28, respectively.
In the vicinity of the head position switching transmission gear 26, a head position switching cam gear 30 is provided.

The rocking plate 2 for switching the head position
8, the head down gear 29 or the head up gear is turned into the head position switching cam gear 3.
0 is selectively meshed.

The head position switching cam gear 3
A head position switching cam groove 32 having a substantially spiral shape is formed on one surface of the head pressure switching member 22. A cam pin 33 formed at the base end of the head pressure contact member 22 is formed in the head position switching cam groove 32. Are adapted to be engaged.

At one end of each of the side plates 3, a pressure contact plate 34 for stacking a plurality of recording papers is placed up and down around support pins 35 projecting from both sides of the base end. The press contact plate 34 has locking notches 36 at both ends on the distal end side. The pressing plate 34 is constantly urged upward by the urging force of a spring (not shown).

Between the side plates 3 and between the pressing plates 34
A paper feed switching cam shaft 38 is rotatably disposed above the leading end of the paper feed switching cam shaft 38, and the paper feed switching cam shaft 38 is switched to a position corresponding to each of the locking notches 36. Lever 39, 39 is attached. Each side plate 3
A paper feed drive shaft 40 is provided between the pressure contact plate 34 and the upper end of the press contact plate 34, and a paper feed roller 42 is attached substantially at the center of the paper feed drive shaft 40. ing.
Further, between the side plates 3 and between the paper feed rollers 42
A paper feed roller 43 is rotatably disposed between the platen 4 and the platen 4.

Further, on one side plate 3, a winding bobbin unit 44 is provided. The take-up bobbin unit 44 has a bobbin shaft (not shown) penetrating the side plate 3, and an ink sheet take-up gear 45 is rotatably mounted outside the bobbin shaft from the side plate 3. A winding bobbin 46 is mounted inside the side plate 3.

The other side plate 3 of the frame 3 is provided with a cassette insertion hole 47 for inserting an ink sheet cassette (not shown) between the line recording head 8 and the platen 4.

At both ends inside the ink sheet cassette, a pair of winding shafts (not shown) are provided, and each of these winding shafts is provided with an ink sheet (not shown) partially between the winding shafts. Is wound so as to be exposed to the outside. At least one end of the ink sheet cassette is provided with a take-up reel (not shown) that rotates integrally with the take-up shaft so as to be exposed to the outside,
With the ink sheet cassette mounted, the take-up reel is engaged with the take-up bobbin 46, and by rotating the take-up bobbin 46, the take-up reel is rotated to take up the ink sheet. ing.

One side of the side plate 3 is provided with a paper feed motor 56.
The output gear (not shown) of the paper feed motor 56 has a two-stage paper feed transmission gear 5.
7 are engaged. The paper feed transmission gear 57 is meshed with a paper feed switching transmission gear 49 coaxially fixed to one end of the paper feed drive shaft 40 via another paper feed transmission gear group 48. The paper feed switching transmission gear 49 is coaxially provided with a paper feed switching swing gear (not shown) that rotates integrally with the paper feed switch transmission gear 49. The paper feed switching rocking plate 50 is provided so as to be swingable about the rotation axis of the paper feed switching rocking gear. A feed gear 51 and a feed stop gear (not shown) meshed with the feed switching rocker are rotatably mounted on the feed switching rocker 50, respectively. In the vicinity of the paper feed switching transmission gear 49, a paper feed switching cam gear 52 fixed coaxially to one end of the paper feed switching cam shaft 38 is provided.

The swinging operation of the feed switching rocker plate 50 causes the feed gear 51 or the feed stop gear to be selectively meshed with the feed switching cam gear 52. It has been done.

On one surface of the feed switching cam gear 52, there is formed a feed switching cam groove 54 having a substantially sector shape and having a contact projection 53 formed at a substantially central portion in the radial direction. A cam pin 55 formed on the paper feed switching rocker plate 50 is engaged with the paper feed switching cam groove 54.

Next, the operation of the embodiment of the present invention will be described.

In the line printer 1 having the head position adjusting mechanism in this embodiment, in order to adjust the position of the line recording head 8, first, the reference positioning groove 6 of the side plate 3 is engaged with the position adjusting jig. Thus, the reference position is determined, and the platen 4 is removed. Since the position adjusting jig corresponds to the position of the platen 4, if the position of the line recording head 8 is adjusted based on the position adjusting jig, the line recording head 8 is moved relative to the platen 4. Position can be adjusted so that each of the heating elements is pressed against each other.

That is, when the line connecting the heating elements of the line recording head 8 in the alignment direction does not overlap the rotation axis of the platen 4, for example, the line connecting the heating elements in the alignment direction and the line If the rotation axis of the platen 4 is not parallel but intersects or intersects, or even if it is parallel but is displaced in the front-rear direction perpendicular to the recording paper conveyance direction, Since each heating element does not press against the platen 4, a Phillips screwdriver is inserted into one of the two head position adjustment holes 14 formed in the mounting portion 10 a of the heat sink 10,
The adjustment part 13b of the head position adjustment eccentric member 13 loosely fitted in the head position adjustment groove 12 is rotated.

Since the head position adjusting eccentric member 13 is eccentrically rotated about the adjusting portion 13b by the rotation of the adjusting portion 13b, the eccentric rotating portion 13a pushes the side surface of the head position adjusting groove 12, and The head mount 9 and the line recording head 8 move integrally.

Whether or not the line connecting the heating elements of the line recording head 8 in the alignment direction overlaps the rotation axis of the platen 4, that is, the position at which all of the heating elements can be pressed against the platen 4. The determination as to whether or not the position is made can be made by checking with a position adjusting jig in a state where the platen 4 is removed from the side plate 3.

If one of the two head position adjusting eccentric members 13 is rotated and the heating elements are not pressed against the platen 4, the other head position adjusting eccentric member 13 is rotated. The line eccentric member 13 is eccentrically rotated by the same operation to move the line recording head 8 together with the head mount 9.

With such an operation, when each heating element of the line recording head 8 can be adjusted to a position where it can be pressed against the platen 4, a Phillips screwdriver is inserted through the fixing insertion hole 16 formed in the mounting portion 10 a of the heat sink 10. The fixing screw 18 is screwed into the fixing screw hole 15 of the head position adjusting groove 12 so that the head mounting base 9 is
Fixed to.

Thus, the position adjustment of the line recording head 8 is completed.

Next, the operation of the line printer 1 for recording on recording paper will be described. In a normal state, the cam pin 33 of the head pressing member 22 is connected to the head position switching cam groove 32 of the head position switching cam gear 30.
And the line recording head 8 is held in a head-up state. Switching lever 3
9 is engaged with each locking notch 36 of the press contact plate 34, and the press contact plate 34 is held in a state of swinging downward.

Then, an ink sheet cassette is inserted between the line recording head 8 and the platen 4 through the cassette insertion hole 47 and mounted, and the take-up reel of the ink sheet cassette is engaged with the take-up bobbin 46. A plurality of recording papers are stacked and placed on the upper surface of the pressing plate 34.

First, by rotating the paper feed motor 56 in the forward direction (clockwise direction in FIG. 2), the paper feed transmission gear group 48 is rotated via the paper feed transmission gear 57. At this time, the line recording head 8 is held in the head-up state, and the ink sheet winding gear 45 is not driven to rotate. Further, the rotation of the paper feed transmission gear group 48 causes the paper feed switch transmission gear 49 to rotate.
Is rotated, the paper feed roller 42 is driven to rotate, and the paper feed switching rocking gear is also rotated integrally. With this rotation, the paper feed switching rocking plate 50 is rocked, and the paper feeding gear 51 is rotated.
Are meshed with the paper feed switching cam gear 52, and the paper feed switching cam gear 52 is driven to rotate. As a result, the feed switching cam shaft 38 is rotated, the switching lever 39 is rotated, and the switching notch 36 between the switching lever 39 and the press contact plate 34 is engaged.
Is released, and the press contact plate 34 is swung upward.

By the upward swing of the pressure contact plate 34, the uppermost recording sheet is brought into contact with the paper feed roller 42, and the recording paper is moved in the direction of the paper feed roller 43 with the rotation of the paper feed roller 42. Conveyed. At this time, since the paper feed roller 43 is driven to rotate clockwise, that is, in the direction opposite to the direction in which the recording paper is conveyed, the recording paper is conveyed until its leading edge abuts against the paper feed roller 43. Will be.

Subsequently, by rotating the paper feed motor 56 in the reverse direction, the paper feed transmission gear group 48 is driven to rotate via the paper feed transmission gear 57, whereby the recording paper is fed by the paper feed roller 43. The sheet is conveyed and a back feed operation is performed. Further, the rotation of the paper feed transmission gear group 48 rotates the paper feed switching transmission gear 49, rotates the paper feed roller 42, and also rotates the paper feed switching rocker gear integrally to rotate this rotation. Accordingly, the paper feed switching rocking plate 50 swings, the paper feed stop gear meshes with the paper feed switching cam gear 52, and the paper feed switching cam gear 52 is driven to rotate counterclockwise. As a result, the feed switching cam shaft 38 is rotated, and the switching lever 39 is rotated.
The switching lever 39 is engaged with the locking notch 36 of the press contact plate 34, and the press contact plate 34 swings downward. In this state, the contact of the recording paper with the paper feed roller 42 is released.

The trailing edge of the recording paper is transported to a predetermined position,
When the back feed operation is completed, the head up / down motor 24 is driven to rotate in the forward direction (counterclockwise), whereby the head position switching transmission gear 26 is rotated clockwise and is rotated together with the head position switching transmission gear 26. The rotation of the head position switching rocking gear causes the head position switching rocking plate 28 to rock, and the head down gear 29 meshes with the head position switching cam gear 30. The meshing of the head down gear 29 causes the head position switching cam gear 30 to rotate clockwise, whereby the cam pin 33 of the head pressing member 22 follows the head position switching cam groove 32 and the head position switching cam. The head pressure contact member 22 is moved downward by being moved to the inner peripheral side of the groove 32, and the head transfer member 19 is also pivoted downward integrally with the head pressure contact member 22.

When the line recording head 8 approaches the platen 4 by the swinging operation of the head pressing member 22, the ink sheet winding gear 45 can be rotated by the swing of the head transfer member 19. .

In this state, when the paper feed motor 56 is driven to rotate in the forward direction, the paper feed transmission gear group 48 is driven to rotate via the paper feed transmission gear 57, and the ink sheet winding gear 45 is turned clockwise. It is rotated and the winding bobbin 4
By rotating the take-up reel, the take-up reel is rotated to drive the take-up of the ink sheet, thereby performing the cueing operation of the ink sheet.

When the cueing of the ink sheet has been completed, the head press-contact member 22 is pivoted downward by further rotating the head up / down motor 24 in the forward direction. Is brought into contact with the platen 4 via the ink sheet and the recording paper, the head transfer member 19 is not swung, but the head pressing member 22 is moved by the cam pin 33 when the head position of the head position switching cam gear 30 is changed. The line recording head 8 is swung further downward against the urging force of the head pressure contact spring 23 until it is located at the innermost peripheral portion of the switching cam groove 32, whereby the line recording head 8 is moved 4 is kept pressed.

In this state, when the paper feed motor 56 is driven to rotate in the forward direction, the paper feed transmission gear group 48 is driven to rotate via the paper feed transmission gear 57, and via the ink sheet winding gear 45, respectively. By rotating the winding bobbin 46, the ink sheet is driven to be wound. At the same time, the paper feed roller 43 is rotated by the rotation of the paper feed transmission gear group 48, and the recording paper is conveyed.
In this state, the heating element of the line recording head 8 generates heat based on a predetermined recording signal, so that the ink of the ink sheet is transferred to the recording paper to perform desired recording on the recording paper. ing.

At this time, the rotation of the paper feed transmission gear group 48 rotates the paper feed switching transmission gear 49 clockwise and drives the paper feed roller 42 to rotate. The recording paper is not fed because the recording paper is released from contact with the paper feed roller 42. Further, the rotation of the paper feed transmission gear group 48 also rotates the paper feed switching oscillating gear integrally, and the paper feed switching oscillating plate 50 oscillates with this rotation. Cam pin 5 formed on plate 50
5 comes into contact with the contact protrusion 53 of the feed switching cam groove 54, the swing of the feed switching rocking plate is restricted, and the feed gear 51 and the feed None of the paper stopping gears are engaged, and the switching lever 3
9 is not swung, and the pressure contact plate 34 is held in a state of being located below.

When the recording is completed, the head up / down motor 24 is rotated in the reverse direction (clockwise) to rotate the head position switching transmission gear 26 in the counterclockwise direction. With the rotation of the head position switching rocker gear rotated together with the head position switching rocker 28, the head position switching rocker plate 28 rocks and the head up gear meshes with the head position switching cam gear 30. Due to the engagement of the head-up gear, the head position switching cam gear 30 is rotated counterclockwise,
As a result, the cam pin 33 of the head pressing member 22 is moved to the outer peripheral side of the head position switching cam groove 32 following the head position switching cam groove 32, and the head pressing member 22
Is swung upward together with the head transfer member 19, and the line recording head 8 is separated from the platen 4.

Thereafter, by driving the paper feed motor 56 to rotate in the forward direction, the paper feed transmission gear group 48 is rotated via the paper feed transmission gear 57, and the paper feed roller 43 is rotated to discharge the recording paper. Perform paper operation. At this time, since the line recording head 8 is held in the head-up state, the ink sheet winding gear 45 is not driven to rotate.

Subsequently, by the rotation of the paper feed roller in the forward direction, the paper feed switching transmission gear 49 is rotated clockwise through the paper feed transmission gear group 48, and the paper feed roller 42 is rotated.
Is rotated, the paper feed switching rocker plate 50 swings, the paper feed gear 51 meshes with the paper feed switching cam gear 52, and the paper feed switching cam gear 52 is driven to rotate clockwise. . As a result, the switching lever 39 is rotated, and the switching lever 39 is engaged with the locking notch 36 of the pressing plate 34.
Is released, the pressure contact plate 34 is swung upward, and the next recording paper feeding operation is performed.

Further, full-color recording can be performed by configuring the ink sheet so that ink sheets of, for example, yellow, magenta, cyan and black are sequentially and sequentially connected. In this case, after the recording operation using the ink of each color is completed,
By performing a back feed operation and repeating this operation, ink of a plurality of colors can be recorded.

Therefore, in the present embodiment, the position of the line recording head 8 with respect to the platen 4 can be easily adjusted with a simple configuration, and the recording accuracy can be improved.

The present invention is not limited to the above-described embodiment, but can be variously modified as needed.

For example, even when the columnar platen 4 in this embodiment is a flat platen 4, the recording surface 8a of the line recording head 8 is moved in parallel to the platen 4 to position the platen 4. Can be adjusted.

In the present embodiment, the number of the eccentric members for adjusting the head position is two, but the present invention is not limited to this, and two or more eccentric members may be used.

[0076]

As described above, the head position adjusting mechanism according to the first aspect of the present invention can easily adjust the position of the line recording head with respect to the platen with a simple configuration, thereby improving the recording accuracy. Can be planned.

The invention described in claim 2 is the same as that in claim 1.
In addition to the effects of the invention described in (1), the position of the line recording head with respect to the platen can be finely adjusted only by pushing the head position adjusting groove of the head mount.

The invention described in claim 3 is the same as that in claim 2
In addition to the effects of the invention described in (1), the position of the line recording head can be finely adjusted by a simple operation of only selectively rotating the plurality of eccentric members for head position adjustment.

The invention described in claim 4 is the same as the invention described in claim 3.
In addition to the effects of the invention described in (1), the head position adjusting hole can be eccentrically rotated while the head mounting base is fixed to the heat radiating plate, so that the position adjustment of the line recording head can be performed more easily and the accuracy can be improved.

In the line printer according to the fifth aspect of the present invention, the position of the line recording head can be easily adjusted, and the recording accuracy can be improved.

The invention described in claim 6 is the same as that in claim 5
In addition to the effects of the invention described in (1), the position adjustment and confirmation of the line recording head can be easily performed without the platen.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a line printer including a head position adjusting mechanism according to the present invention.

FIG. 2 is an exploded perspective view showing an embodiment of a line printer including a head position adjusting mechanism according to the present invention.

FIG. 3 is an exploded perspective view showing a main part of a head position adjusting mechanism according to the present invention.

FIG. 4 is a perspective view showing a head position adjusting eccentric member in the embodiment of the head position adjusting mechanism according to the present invention.

FIG. 5 is a side view showing a configuration of a main part of a conventional line printer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Line printer 2 Substrate 3 Side plate 4 Platen 5 Reference positioning part 6 Reference positioning groove 8 Line recording head 9 Head mounting base 10 Heat radiating plate 12 Head position adjusting groove 13 Head position adjusting eccentric member 14 Head position adjusting hole 15 Fixing screw hole 16 Insertion hole for fixing

Claims (6)

[Claims] 1. A head position adjusting mechanism for adjusting a position of a line recording head having a plurality of heating elements in a direction perpendicular to a recording paper conveyance direction so that each heating element can be pressed against a platen. A head position adjusting mechanism comprising: a movement adjusting unit that adjusts a recording surface of the head so as to move the recording surface in parallel with the platen. 2. The head according to claim 1, wherein the line recording head is fixed to a head mount, a head position adjusting groove is formed in the head mount, and the movement adjusting means pushes a side surface of the head position adjusting groove to move the head. The head position adjusting mechanism according to claim 1, wherein the recording surface of the line recording head is moved together with the mounting table. 3. A head position adjusting eccentric member which eccentrically rotates within the head position adjusting groove and pushes a side surface of the head position adjusting groove. 3. The head position adjusting mechanism according to 2. 4. The head mounting base is fixed to a heat sink, and a head position adjusting hole for arbitrarily rotating the head position adjusting eccentric member to the heat sink is connected to the head position adjusting groove. 4. The head position adjusting mechanism according to claim 3, wherein the head position adjusting mechanism is formed as follows. 5. A line recording head fixed to a head mount is pressed against a platen via an ink sheet and recording paper, and each of the heating elements of the line recording head is selectively heated based on a predetermined recording signal. A line printer for performing recording on the recording paper by using the head position adjusting mechanism according to any one of claims 1 to 4. 6. The line printer according to claim 5, wherein the platen is detachably supported on a side plate.