JPH07117307A - Method for adjusting mounting position of thermal line head in thermal line printer - Google Patents

Abstract

PURPOSE:To set a diameter of a platen roller to be small by adjusting a mounting position of a thermal line head to a head support on the basis of a density or thickness of lines printed on a heat-sensitive paper. CONSTITUTION:A controlling device 314 is activated to carry out a heat- generating operation by a thermal line head 154 all over the length of the line head all at once. The above operation in the batch mode is repeated. Mounting screws 212 are tightly fastened when a printed line becomes thickest and densest to truely fix the thermal line head 154 to a head support 156. When the thermal line head 154 is tightly fixed to the head support 156 as above, a heat-generating position X of the thermal line head 154 is surely set at a position where the thermal line head is in touch or out of touch with a platen roller while the head support 156 separated from a mounting instrument 300 is incorporated in tone thermal line printer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adjusting a mounting position of a thermal line head on a head support in a thermal line printer configured to print a predetermined image on a thermal paper by using the thermal line head, and more particularly, A method for adjusting the mounting position of the thermal line head in the thermal line printer for adjusting the mounting position of the thermal line head so that the heat generation position of the thermal line head is brought to the rolling position of the platen roller on which the thermal head rolls. Regarding

[0002]

2. Description of the Related Art Conventionally, a thermal line printer configured to print a predetermined image on a thermal paper using a thermal line head is known. In this type of thermal line printer, when the thermal line head is pressed against the platen roller and the thermal paper is passed between the two, the thermal line head is operated to generate heat according to the print information and a predetermined image is printed on the thermal paper. It is configured to print on.

[0003]

Here, the thermal line head is attached to a head support, and the head support is configured to be attached to a frame in which a platen roller is rotatably supported. Therefore, the error of the mounting position of the thermal line head to the head support, the error of the mounting position of the platen roller to the frame, the error of the mounting position of the head support to the frame, etc. overlap, resulting in the heat generation position of the thermal line head. However, it is difficult to accurately position the roller at the rolling contact position with the platen roller. As described above, if the heat generation position of the thermal line head cannot be accurately positioned at the rolling contact position with the platen roller, the print image on the thermal paper becomes thin and blurry, and the so-called print state is poor. Becomes

In order to avoid such a print failure state, conventionally, the diameter of the platen roller is set to be large, or the pressing pressure of the thermal line head against the platen roller is set to be large so that the elasticity of the platen roller is increased. By using deformation, a large rolling contact range of the thermal line head to the platen roller is secured, and even if the heat generation position of the thermal line head deviates from the design position (optimal position), it remains within the rolling contact range. In this way, the print condition is maintained in a desired good condition. As a result, the diameter of the platen roller must be set large, and therefore the housing becomes large, and
The weight of the platen roller also increases, and the drive motor for rotationally driving the platen roller also increases in size and requires a large amount of motor torque, which leads to an increase in size of the device. Improvement was requested from the viewpoint of sex.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a head support so that a heat generation position of a thermal line head exactly matches a rolling contact position with a platen roller. It is to provide a method for adjusting a mounting position of a thermal line head in a thermal line printer capable of adjusting a mounting position of the.

[0006]

[Means for Solving the Problems]
In order to achieve the object, a method for adjusting a mounting position of a thermal line head in a thermal line printer according to the present invention, according to the first aspect, temporarily fixes the thermal line head to a head support in a positionally adjustable manner. The process and the head support to which the thermal line head is temporarily fixed is attached to a mounting jig provided with a dummy roller corresponding to the platen roller, and the relative position between the dummy roller and the head support is defined at a predetermined position. And a third step of sandwiching the thermal paper between the dummy roller and the thermal line head,
The fourth step of collectively heating the thermal line head over the entire length, and the attachment of the thermal line head to the head support based on the density and / or thickness of the line printed on the thermal paper by this heat generation. And a fifth step of adjusting the position.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of a thermal line printer according to the present invention will be described in detail below with reference to the accompanying drawings. The thermal line printer (hereinafter, simply referred to as a printer) 10 is A in this embodiment.
An image is formed (printing operation) at high speed on a paper P made of 5-size thermal paper by using a thermal line print mechanism 60 having a thermal line head 154 described later based on print information from a personal computer (not shown). In addition to being able to do so, it is configured so as to be portable to a portable personal computer, that is, small enough to be portable.

The printer 10 is constructed so that it can be selected from the horizontally placed state as shown in FIG. 1 and the vertically placed state as shown in FIG. Further, the thermal line printer 10 is configured so that the thermal line printing mechanism 60 is driven by a rechargeable nickel-cadmium battery 64 housed in a battery chamber 62 described later. In this embodiment, the thermal line print mechanism 60 is also configured so that it can be driven by a DC voltage obtained by converting an AC power source using an AC / DC converter (not shown). Here, the nickel-cadmium battery 64 described above is set to be charged when the DC voltage is not applied and is not driven.

More specifically, the printer 10 is provided with a substantially rectangular parallelepiped housing 12, and the housing 12 is composed of an upper housing portion 14 and a lower housing portion 16. In addition, these upper housing portion 14 and lower housing 1
6 are detachably fixed to each other by screws (not shown).

Here, in the substantially central portion of the front portion of the upper housing portion 14 which constitutes the upper half of the housing 12, the nickel-containing nickel alloy described below extends over the upper surface 14a and the front surface 14b thereof.
A battery lid 18 that covers the battery chamber 62 that houses the cadmium battery 64 is detachably attached. Further, behind the upper surface 14a of the upper housing portion 14, the paper P is inserted into the housing 12 in a vertically long state when used in a horizontally placed state as shown in FIG. A first sheet insertion groove 20 is formed. Further, a paper discharge groove 22 for discharging the printed paper P from the inside of the housing 12 is formed in substantially the central portion of the upper surface 14 a of the upper housing portion 14 over substantially the entire width direction. Further, on the rear surface 14c of the upper housing portion 14, as shown in FIG. 2, the second sheet insertion in which the sheet P is inserted in the vertically long state when used in the vertically placed state over substantially the entire width direction. Groove 2
4 are formed. Here, the rear surface 14c of the upper housing 14 in FIG. 1 showing the horizontally placed state constitutes the upper surface of the upper housing 14 in FIG. 2 showing the vertically placed state. The first and second paper insertion grooves 16 and 20 and the paper ejection groove 18 have a length suitable for inserting the A5 size paper P in a portrait state, that is, the length of the short side of the A5 size. Each of them is formed to have a length slightly longer than that.

A power button 26 is attached to the front right side of the upper surface 14a of the upper housing portion 14 so as to be freely pushed. By pushing and driving the power button 26, a power switch 28 described later (see FIG. 3). Is turned on, and the drive system 88 and the thermal line print mechanism 60 are turned on.
Is configured to be in a drivable state. When the power switch 28 is turned on, a power (POW / CHRG) lamp 30 arranged on the front left side of the upper surface 14a of the upper housing portion 14 is turned on. Here, the power lamp 30 has a battery chamber 62.
It is set to blink when the remaining amount of the nickel-cadmium battery 64 housed therein is less than a predetermined amount.

On the other hand, on the left side of the upper surface 14a of the upper housing portion 14, an online (ONLINE) button 32, a mode setting (MODE) button 34, and a forced feed (FEED) button 36.
Are juxtaposed. Here, each time the online button 32 is pushed and driven, an online switch (not shown) is sequentially switched between an online (connected) state and an offline (disconnected) state. The online lamp 38 disposed on the front left side of the upper surface 14a of the upper housing portion 14 is set to be turned on when the online state is set and turned off when the offline state is set. ing.

Further, the mode setting button 34 is operated by pressing the button to select whether the font changeover switch (not shown) selects Mincho typeface or Gothic typeface as a character font used for printing operation. It is set to be switched sequentially. The font (Gothic) lamp 40 arranged on the front left side of the upper surface 14a of the upper housing portion 14 is turned on when the Gothic font is selected and is turned off when the Mincho font is selected. It is set.

Further, the forced feed button 36 is turned on by a drive switch (not shown) only while it is being pushed and driven, and a feed roller 84 is provided in a drive system 88 described later.
Also, the platen roller 86 is forcibly rotationally driven so that the paper P can be forcibly conveyed (discharged). Further, on the front left side of the upper surface 14a of the upper housing portion 14, a paper-less display (P.E.) lamp 42 is provided, which is turned on when the paper P is discharged from the paper transport path described later, First and second sheet insertion grooves 20, 24
Is set to blink at the same time when an abnormal state in which the paper P is inserted occurs. The four types of lamps 30, 38, 40 and 42 are each composed of an LED (Light Emitting Device) in this embodiment.

On the other hand, a recess 44 is formed on the upper surface 14a and the right side surface 14d of the upper housing portion 14 from the rear of the center of the right portion.
A release lever 46 for releasing a pressure contact state between a thermal line head 154 and a platen roller 86, which will be described later, is provided therein so as to be swingable around an axis extending along the longitudinal direction of the housing 12. . The release lever 46 is in the state shown in FIG.
1 to allow the press contact between 54 and the platen roller 86.
By swinging clockwise from the state shown in FIG. 2, the thermal line head 154 and the platen roller 86
It is set so as to forcibly release the pressure contact state with and to allow the sheet P sandwiched between them to be easily taken out.

Further, as shown in FIGS. 1 and 2, the upper housing portion 14 has an upper surface 14a at substantially the center of the rear portion thereof.
Also, a back cover 48 is swingably supported on the rear surface 14c. By swinging the back cover 48 upward, the rear central portion (that is, the installation space SP in which the slide press member 192 described later is installed) in the housing 12 is opened. By thus opening the substantially central portion of the rear portion of the housing 12, the slide press for bringing the sheet P inserted from the first sheet insertion groove 20 into contact with the feed roller 84 in the horizontally placed state. The member 192 can be attached to and detached from (replaced with) the housing 12.

Here, as shown in FIG. 1, the housing 12
The right side surface 16a of the lower housing portion 16 that constitutes the lower half
A connector 50 for online connection to an external device (not shown) such as a personal computer
However, power supply connectors 52 for connecting to an AC / DC converter (not shown) are provided in the rear part. Further, as shown in FIG. 2, a density adjusting dial 54 for adjusting the print density is disposed on the left side surface 16b of the lower housing portion 16 so as to be rotatable around a vertical axis in a horizontally placed state. By appropriately rotating the density adjustment dial 54, it is possible to adjust the heat generation amount of the thermal line head 154 described later and set the print density on the paper P to a desired density.

As shown in FIG. 2, on the upper surface 14a of the upper housing 14 located on both sides of the back cover 48, there are insertion holes 58 into which both ends of the U-shaped paper guide 56 are inserted. Has been formed. As shown in FIG. 1, this paper guide 56 is used by inserting it into the insertion hole 58 in a horizontal state, and is formed on the bottom surface of the lower housing portion 16 in a vertical state shown in FIG. It is stored and held in a holding groove (not shown).

Next, the structure of the thermal line printing mechanism 60 arranged in the housing 12 will be described in detail with reference to the drawings starting from FIG. 3 is a top view showing the internal structure of the housing 12 with the battery lid 18 removed and the upper housing portion 14 removed, and FIG. 4 shows a cross section taken along the line AA in FIG. As shown in FIGS. 3 and 4, a battery chamber 62 is disposed in the front center of the housing 12, and the battery lid 18 is opened in the battery chamber 62. Thus, the nickel-cadmium battery 64 is exchangeably loaded. On the right side of the battery chamber 62 in the drawing, a power switch 28 that is turned on / off by the power button 26 described above is provided.

The positional relationship between the power button 26 and the power switch 28 is clear from FIG. 4, and the actuator 28a of the power switch 28 is in a state of being laterally offset from the central axis of the power button 26. Has been done. This offset is set in order to use the upper surface of the switch body 28b of the power switch 28 as the lower receiving surface of the spring 66 for constantly urging the power button 26 upward.

The power switch 28 is fixed on the control board 68 as shown in FIG. The control board 68 is fixedly mounted on the bottom surface of the lower housing portion 16 of the housing 12 via a screw (not shown). Here, on the control board 68, the connection connector 50 described above is provided.
And the power supply connector 52 is fixed. In addition, on the control board 68, a microcomputer 70 that controls the overall control, an EPROM 72 in which a control program, initial values, etc. are stored,
For example, D for expanding print information on a bitmap
RAM 74, a first font ROM 76 in which Gothic fonts are stored, and a second font in which Mincho type fonts are stored.
The font ROM 78 and the like are attached. A pair of coil springs 182 for urging a head support 156 described later upward to press the thermal line head 154 supported by the head support 156 against the platen roller 86 penetrates through the control board 68. Is formed with a pair of openings 80.

Here, as shown in FIGS. 3 and 4, on the left side of the battery chamber 62 in the drawing, the above-mentioned four LEDs 30, 3 are provided.
An LED board 82 on which 8, 40 and 42 are mounted is attached. On the other hand, behind the battery chamber 62, a feed roller 84 and a platen roller 86 are rotatably supported, and the feed roller 84 and the platen roller 86 are also rotatably supported.
A frame 90 to which a drive system 88 for rotating and driving is attached is provided. The frame 90 is fixed to the lower surface of the upper housing portion 14 from below via three screws 92 (shown in FIGS. 3 and 11) in this embodiment.

As shown in FIGS. 6 to 10, the frame 90 is a substantially flat frame body integrally formed with three mounting bosses 94a, 94b, 94c into which the above-mentioned screws 92 are respectively inserted. 96 and this frame body 9
The left side plate 98 is formed integrally with the left end portion of the frame 6 in an upright state, and the right side plate 100 is formed integrally with the right end portion of the frame body 96 in the upright state. . Here, the frame main body 96 guides the paper P inserted from the first or second paper insertion groove 20 or 24 between the frame main body 96 and an under guide 184 (described later) disposed below the frame main body 96. Common paper feed path F for feeding
_It defines ₀ . Further, the left side plate 98 functions as a mounting board for a drive system 88 described later, and the left and right side plates 9 are
The reference numerals 8 and 100 function as a base for rotatably supporting the head support 156.

On the other hand, as shown in FIG. 6, the frame body 96
A discharge guide portion 104 for guiding the paper P, for which the printing operation has been completed, to the paper discharge groove 22 in a state in which a space 102 for housing and disposing the platen roller 86 is provided in front of the both side plates. It is integrally provided in a state of being bridged between 98 and 100. This discharge guide section 104
9 and 10, the cross section is formed in an arc shape so as to face the outer periphery of the platen roller 86, and the end of the arc-shaped paper discharge path F _d defined between the two is the paper. It opens to the discharge groove 22.

As shown in FIG. 10, the frame body 9
The rear portion 96a of 6 is gently bent upward. On the other hand, immediately behind the frame main body 96, a substantially L-shaped insertion guide portion 106 is integrally provided in a state of being bridged between the side plates 98 and 100. As shown in FIG. 11, the insertion guide portion 106 is inserted between the gently bent rear portion 96a of the frame main body 96 and the sheet inserted from the first sheet insertion groove 20 in a horizontal state. P
And a vertical portion 106a that defines a first sheet conveying path F ₁ for guiding toward the common sheet conveying path F ₀ described above, the second sheet insertion, in a vertically placed condition between the under guide 184 The sheet P inserted from the groove 24 is integrally formed with the lateral portion 106b that defines the _second sheet conveyance path F ₂ for guiding the sheet P toward the common conveyance path F ₀ described above. Here, the base end portion of the _first paper feed path F ₁ is opened to the above-described first paper insertion groove 20 and the second paper feed path F 1 is opened.
₂ the proximal end is open to the second sheet insertion groove 24 described above.

Here, the above-mentioned feed roller 84 is
In this embodiment, the paper P inserted into the housing 12 through the first paper insertion groove 20 when used in the horizontal state shown in FIG. _In order to convey the sheet toward ₀ (specifically, toward the rolling contact portion between the platen roller 86 and the thermal line head 154 described later) and when used in the vertically placed state shown in FIG. The paper P that has been inserted into the housing 12 through the paper insertion groove 24 is further forward of the common paper conveyance path F.
_It is provided as a common transport means for transporting toward ₀ .

Further, as shown in FIG. 3 again, the platen roller 86 is rotatably supported in front of the frame main body 96 in a state of being positioned in the space 102 described above.
As shown in FIG. 12, the platen roller 86 includes a shaft portion 108 and a roller body 110 coaxially attached to the outer periphery of the shaft portion 108 except for both ends 108a and 108b. The roller body 110 is made of urethane foam in this embodiment.

Here, both end portions 108 of the shaft portion 108 are
Bearings 112 and 114 are fitted in a and 108b, respectively. Then, the one end portion 10 of the shaft portion 108
One of the bearings 112 fitted in the 8a has a first through hole 11 formed in a substantially central portion of the left side plate 98 shown in FIG.
Therefore, the shaft portion 108 is rotatably supported by the left side plate 98 at the one end portion 108a. The end edge of the one end portion 108a of the shaft portion 108 is
The first driven gear 118 that constitutes the drive system 88 is coaxially and integrally attached to the protruding end, which further projects outward from the one bearing 112.

Further, the other end portion 108b of the shaft portion 108
The other bearing 114, which is fitted to the right end of the right side plate 100 shown in FIG. 8, is prevented from being displaced downward in a snap coupling state in an arcuate recess 120 formed so as to open downward. The shaft portion 108 is connected to the right side plate 1 at the other end portion 108b in this manner.
It will be rotatably supported at 00.

On the other hand, as shown in FIG. 6, an opening 124 for accommodating the roller main body 122 of the feed roller 84 is formed in the rear center of the frame main body 96. Then, as shown in FIG.
A feed roller 84 is rotatably mounted on the rear portion. The feed roller 84 is provided with a shaft portion 126 as shown in FIG. 13, and the length of the shaft portion 126 is one end portion 126 as shown in FIG.
The a is projected outward from the left side plate 98, and the other end 126b is set so as to pass through the above-mentioned opening 124 and terminate at a position extending by a predetermined length therefrom. And
Since the roller body 122 described above is housed in the opening 124, it is coaxially and integrally attached to the shaft portion 126 near the other end 126b.

Here, one end portion 1 of the shaft portion 126
Although not shown, a bearing is fitted into 26a. Here, the bearing fitted in the one end portion 126a penetrates into the second through hole 128 formed in the rear portion of the left side plate 98 shown in FIG.
One end 126a of 26 is rotatably supported by the left side plate 98. In addition, one end portion 126a of the shaft portion 126
The end edge of is protruded further outward from this bearing, and the second driven gear 130 constituting the drive system 88 is coaxially and integrally attached to this protruding end.

Further, the other end portion 126b of the shaft portion 126
Are rotatably supported by bearings 132 arranged on the frame body 96 adjacent to the openings 124.
In this way, the feed roller 84 is attached to and supported by the frame 90 so as to be rotatable around the fixed axis.

Next, the structure of the drive system 88 for rotationally driving the feed roller 84 and the platen roller 86 described above will be described. First, as shown in FIG. 7, the left side plate 98 of the frame 90 serving as a substrate to which the drive system 88 is attached has a substantially square front portion 98a positioned in front.
And an upper end surface that is flush with the upper end surface of the front portion 98,
It is integrally formed with a rear portion 98b formed behind the front portion 98a in a shape substantially corresponding to the right side plate 100. On the inner surface of the front portion 98a, as shown in FIGS.
As shown in FIG. 3, a state in which the holding portion 136 that holds the drive motor 134 (shown in FIG. 3) as a so-called stepping motor that is driven by a pulse signal and that constitutes the drive system 88 protrudes inward. Are formed integrally.
A third through hole 138 into which the motor shaft 134a of the drive motor 134 is loosely fitted is formed in the front portion 98a. As shown in FIG. 3, a drive gear 140 is coaxially and integrally attached to the tip of the motor shaft 134a.

As shown in FIG. 7, the first to third support pins 142, 14 are provided at predetermined positions on the outer surface of the left side plate 98.
4, 146 are planted, and first to third idle gears 148, 150, 152, which will be described later, are rotatably attached to the first to third support pins 142, 144, 146, respectively. It is supported.

Now, referring to FIG. 14, this drive system 8
8, the configuration of a gear train as a drive force transmission mechanism for transmitting the drive force of the drive motor 134 to the platen roller 86 and the feed roller 84 will be described. The large diameter portion 148a of the first idle gear 148, which is rotatably supported by the above-mentioned first support pin 142, is the drive gear 14
The small diameter portion 148b of the first idle gear 148 meshes with the large diameter portion 150a of the second idle gear 150 rotatably supported by the second support pin 144. . The small diameter portion 150b of the second idle gear 150 meshes with the first driven gear 118 that is coaxially fixed to the platen roller 86.

On the other hand, the first driven gear 118 is the third driven gear 118.
Is engaged with a third idle gear 152 that is rotatably supported by a support pin 146 of the second idle gear 152. The third idle gear 152 is a second idle gear that is coaxially fixed to the feed roller 84.
Of the driven gear 130. Here, the number of teeth of the first driven gear 118 is set to be slightly smaller than the number of teeth of the second driven gear 130. As a result, the driving force of the drive motor 134 is transmitted through the gear train configured as described above to the platen roller 86 and the feed roller 8.
4 is transmitted to drive them in rotation. Here, during this driving, the rotation speed of the platen roller 86 is set to be slightly higher than the rotation speed of the feed roller 84. Therefore, the rear end of the preceding paper P and the front end of the succeeding paper P are reliably separated in the transport direction during continuous feeding of the paper P described later. Further, the paper P conveyed to the platen roller 86 by the feed roller 84 is taut between the both while being tensioned. In addition, between the shaft portion 126 of the feed roller 84 and the second driven gear 130,
Although not shown, a slip clutch is provided.

A head support 156 for supporting the thermal line head 154 is pivotally supported on the rear portion of the frame 90 below the frame 90 to which the drive system 88 thus constructed is attached. Due to this swinging support, the left and right side plates 98, 10 that form the frame 90
As shown in FIGS. 7 and 8, shaft support pins 158 and 160 are formed in the rear portion of the outer surface of No. 0 so as to project outward, respectively. On the other hand, the head support 156 is shown in FIG.
As shown in a state of being taken out in FIG. 2, a substantially flat plate-shaped support body 162, a left side plate 164 integrally formed on the left end portion of the support body 162 in a standing state, and a right end portion of the support body 162. A right side plate 166 integrally formed in an upright state, and a discharge guide part that is integrally formed in a front end portion of the support body 162 in an upright state and is bent with a front end inclined forward. 168 is roughly provided and configured.

Here, at the rear end portions of the left and right side plates 164, 166, support openings 170, 172 are fitted to the above-mentioned shaft support pins 158, 160 from the outside to be rockably supported, respectively.
Are formed. In addition, a pair of left and right bearings 112 and 114 for pivotally supporting the platen roller 86 are fitted and supported on the upper end surfaces of the front portions of the left and right side plates 164 and 166, respectively. Are formed. On the other hand, the support main body 162 is formed with a pair of head mounting holes 178 (only one head mounting hole is shown in FIG. 12) formed of long grooves extending along the conveyance direction of the paper P. There is.

Incidentally, a pair of left and right positioning recesses 174, 17
The width of the sheet P along the conveyance direction of the sheet P is set to an optimum value so that the corresponding bearings 112 and 114 can be fitted tightly. Therefore, in this one embodiment, FIG.
5 and FIG. 16, the bearings 112 and 114 attached to both ends of the platen roller 86 are fitted into the positioning recesses 174 and 176 of the head support 156, respectively. The relative position between the two will be accurately defined.

The head support 15 constructed in this way
A well-known thermal line head 154 is placed on the support body 162 of No. 6, and the above-mentioned head mounting hole 17
A pair of mounting screws 21 inserted from below via 8
2 (shown in FIG. 24), the thermal line head 1
54 is fixed on the support body 162. During this fixing operation, the heat generation position of the thermal line head 154 (the line indicated by the symbol X in FIG. 3) is accurately positioned at the rolling contact position with the platen roller 86 via the mounting jig 300 described later. Then, the mounting position is fixed in a state where the mounting position is accurately adjusted and regulated along the conveyance direction of the paper P. In the mounting position adjusting operation of the thermal line head 154 to the head support 156 via the mounting jig 300, and the fixing operation after the position adjusting operation, the head support 156 is removed from the frame 90. Is set to run.

The head support 156 is configured in this manner, and the thermal line head 154 is mounted / fixed to the head support 156 via the mounting jig 300 in a state where the mounting position is accurately specified. Further, the bearings 112 and 114 attached to both ends of the platen roller 86 are fitted into the positioning recesses 174 and 176 of the head support 156, respectively, so that the relative distance between the head support 156 and the platen roller 86 is increased. Since the position is accurately defined, the head support 156 to which the thermal line head 154 is attached and fixed is swingably attached to the frame 90, and the platen rollers are inserted into the positioning recesses 174 and 176 of the head support 156. 86 bearings 11
By inserting 2 and 114 respectively, the positional relationship between the thermal line head 154 and the platen roller 86 is accurately defined such that the heat generation position X of the thermal line head 154 is brought into accurate rolling contact with the platen roller 86. It will be a matter.

As described above, in this embodiment, since the heat generation position X of the thermal line head 154 is accurately defined so as to accurately contact the platen roller 86, the diameter of the platen roller 86 is set small. Since the diameter of the platen roller 86 has a great influence on the overall size of the thermal line printer 10, the overall configuration of the thermal line printer 10 can be miniaturized in this manner. You can do it.

On the other hand, this head support 156 is shown in FIG.
As shown in FIG. 7, a pair of spring receiving seats 180 formed on the bottom portion of the lower housing portion 16 are provided with coil springs 182 that receive the lower ends of the spring receiving seats 180.
In other words, the thermal line head 154 is rotationally biased so as to be in rolling contact with the platen roller 86 from below.
Here, as shown in FIG. 17 and FIG. 5 described above, these spring receiving seats 180 are formed through an opening 80 formed in a control board 68 disposed above the bottom portion of the lower housing portion 16. It is taken out above the control board 68.

Here, as described above, the head support 156 is swingably supported by the frame 90 to which the platen roller 86 is attached while being positioned. Therefore, the pair of coil springs 182 described above
Due to the urging force of the platen roller 86, the heat generation position X of the thermal line head 154 is surely extended over its entire length.
The state of being transferred to will be achieved. As a result, in this embodiment, at the time of printing operation, the paper P
In the state in which this is sandwiched between the thermal line head 154 and the platen roller 86, the thermal line head 154 is securely brought into close contact with the thermal line head 154 over the entire length in the width direction. Thus, in this embodiment, the paper P
The state in which line printing is reliably performed over the entire length in the width direction is achieved.

Further, in this embodiment, as is apparent from the above description, it is sufficient that the thermal line head 154 is brought into contact with the platen roller 86 at least in a rolling contact state from below. As a result, the thermal line head 154 is connected to the platen roller 86.
The urging force of the coil spring 182 for contacting with the coil 182 requires a relatively small force. Therefore, in this embodiment, the pressure contact force of the thermal line head 154 contacting the platen roller 86 is extremely small.

Thus, according to this embodiment,
The tip of the paper P nipped by the rolling contact portion between the thermal line head 154 and the platen roller 86 is engaged with the surface of the thermal line head 154 by a strong pressure contact force, and there is substantially no risk of damaging the surface. Become. Further, even if the thermal line head 154 is always in rolling contact with the platen roller 86, there is no possibility that the platen roller 86 is adversely affected by permanent deformation or the like. As a result, for example, the thermal line head 154 is separated from the platen roller 86 in the standby state, and the thermal line head is brought into pressure contact with the platen roller after the leading edge of the paper passes between the thermal line head and the platen roller. It is not necessary to provide the conventional auto-retraction mechanism configured as above. In this way, the auto-retraction mechanism that has been conventionally required is not necessary in this embodiment, and the cost can be reduced by that amount, and the size of the entire apparatus can be reduced by the amount that does not need to be provided. You will be able to do it.

It should be noted that, as shown in FIG. 19, the discharge guide portion 168 constituting the above-mentioned head support 156 is located below the platen roller 86 and in front of the platen roller 86 when the thermal line head 154 is in rolling contact with the platen roller 86. Positioned so as to face each other, the leading end of the paper P printed by the thermal line head 154 is
It is set so as to come into contact with the paper discharge guide portion 168, change its conveying direction upward, and be guided to the above-described paper discharge path F _d .

On the other hand, the frame 90 and the head support 15
As shown in FIG. 11, between the thermal line head 154 and the thermal line head 154, the common paper feed path F ₀ and the second
Under guide 18 that defines the bottom of the paper transport path F ₂
4 is installed. As shown in the bottom view of the attached state in FIG. 18, the under guide 184 has a guide body 186 on a substantially flat plate, an opening 188 formed substantially rearward of a central portion of the guide body 186, and a guide body 18.
6 and a biasing plate 190 that is taken out above the guide body 186 through the opening 188. Here, as shown in FIG. 19, the urging plate 190 forcibly rolls the leading end of the paper P brought to the common paper transport path F ₀ to the feed roller 84,
By the frictional engagement force between the paper P and the feed roller 84, the paper P can be conveyed toward the rolling contact portion between the platen roller 86 and the thermal line head 154 as the feed roller 84 rotates. .

When the thermal line printer 10 is used vertically as shown in FIG.
Since the sheet conveyance path F ₂ and the common sheet conveyance path F ₀ are formed in a substantially straight line, the leading end of the sheet P inserted into the housing 12 through the second sheet insertion groove 24 is Due to its own weight, it descends the second sheet transporting path F ₂ and is brought to the common sheet transporting path F ₀ , where it is surely brought to the rolling contact portion between the urging plate 190 and the feed roller 84. Become. Therefore, in this embodiment, the urging plate 190 is
No mechanism for applying a conveying force to the sheet P is provided upstream of the rolling contact portion between the feed roller 84 and the feed roller 84 in the sheet conveying direction.

On the other hand, when the thermal line printer 10 is used in a horizontal position as shown in FIG. 1, the first paper feed path F ₁ and the common paper feed path F ₀ are set to intersect with each other. Therefore, the front end of the paper P inserted into the housing 12 through the first paper insertion groove 20 is not directly conveyed to the common paper conveyance path F ₀ . Therefore, in this embodiment, in order to forcibly move the sheet P brought to the _first sheet conveying path F ₁ to the common sheet conveying path F ₀ , a conveying force is applied to the sheet P. ,
The paper P on the first paper conveyance path F ₁ is fed by the feed roller 8
The slide press member 192 for frictionally engaging the
As shown in FIG. 20, in the installation space SP defined between the feed roller 84 and the back cover 48, it is arranged so as to face the center of the feed roller 84. still,
This arrangement space SP communicates with the first sheet conveyance path F ₁ .

This slide press member 192 is shown in FIG.
22 and the feed roller 84 as shown in FIG.
The main body of the press which is set so that the surface facing to the thermal line printer 10 is composed of a slope inclined by a predetermined angle with respect to the horizontal line as shown in FIG. 194 and the press body 1
A rubber plate 196 serving as a friction plate, which is entirely attached to the slope of 94, and a coil spring 19 for pressing the press body 194 against the feed roller 84.
And 8 are provided. Here, in order to make the press body 194 movable only in the horizontal direction in the state shown in FIG. 20 (that is, to support the feed roller 84 so as to be able to move forward and backward only in one direction), the press body 194 can be moved. Grooves 194a and 194b that extend in the horizontal direction in the state shown in FIG. 20 are formed on both side surfaces of 194, while, as shown in FIG. 6 and FIG. A pair of slide guides 200a and 200b that fit into the grooves 194a and 194b, respectively, are provided so as to face the above-mentioned installation space SP.

On the other hand, on the rear surface of the press body 194,
As shown in FIG. 22, a cylindrical spring seat 202 for receiving the tip of the above-mentioned coil spring 198 is integrally formed. Here, this coil spring 198
Has its tip housed in the spring receiving seat 202,
As shown in FIG. 20, the rear end is engaged with the inner surface of the back cover 48 to be contracted in the axial direction, and the press body 19
4 is set so as to exert an urging force that urges 4 toward the feed roller 84.

Here, the rubber plate 196 described above is used.
In other words, when a plurality of sheets P are inserted into the first sheet insertion groove 20, they are sandwiched one by one at the rolling contact portion between the feed roller 84 and the slide press member 192, in other words, It is arranged so that a plurality of sheets P can be separated.

In the horizontal state shown in FIG. 20, the paper P inserted into the housing 12 from the first paper insertion groove 20 formed in the upper housing portion 14 has the first paper conveyance path F ₁ While passing through the slide press member 1
The feed roller 84 is pressed against the feed roller 84 by 92, and further conveyed in accordance with the rotational drive of the feed roller 84. The rubber plate 1 attached to the slide press member 192
The contact 96 is in contact with the feed roller 84 in a state of being inclined by the above-described predetermined angle with respect to the horizontal line in the horizontal state shown in FIG. As a result, the feed roller 8
The paper P that has been conveyed forward by the rotation of 4 is
An under guide 184 that conveys along the inclined surface of the rubber plate 196 and obliquely defines the lower end of the common paper conveyance path F ₀ is the leading end of the paper P (specifically, a biasing plate that constitutes the under guide 184). It comes into contact with the upper surface of 190). Accordingly, the leading end of the sheet P is reliably enters the common paper transportation path F in _0, then to be carried to the common paper transportation path F within _0.

On the other hand, when the paper P is jammed in the housing 12 while being sandwiched between the feed roller 84 and the slide press member 192, the rear end of the jammed paper P is the first paper. When protruding from the insertion groove 20, by pulling out the rear end of the rear end, the paper P can be easily taken out from the housing 12. Specifically, when the jammed paper P is to be pulled out backward, the surface of the rubber plate 196 frictionally engaged with the jammed paper P is in the moving direction of the press body 194 to which the rubber plate 196 is attached. Since they are inclined with respect to each other, a component force of the force for pulling out the jammed sheet upward is generated along the moving direction of the press body 194. This component force is applied to the coil spring 1 that presses the press body 194 against the feed roller 84.
It will function as an opposing force against the urging force of 98,
As a result, the rubber plate 196 causes the feed roller 8 to
The force that presses against 4 will be weakened. In this way, even if the press member 192 that presses the jammed paper P against the feed roller 84 is not removed, as described above, the jammed paper P is simply pulled out to remove it. It can be taken out from the housing 12.

The degree of jamming is severe, and the leading end of the jammed paper P is caught on the leading end of the press member 192,
If it cannot be pulled out backwards, back cover 4
The pressing member 192 can be pulled out backward by rotating 8 to open the installation space SP. In this way, even if the degree of jamming is great, the jam can be easily released by simply removing the press member 192 from the housing 12. Here, by removing the press member 192 from the housing 12, it is possible to easily replace the rubber play 196 as a consumable item with a new one.

Here, when the above-mentioned jam of the paper P occurs at the rolling contact portion between the platen roller 86 and the thermal line head 154, it may be necessary to release both. Therefore, as shown in FIG. 23, the release lever 46 described above is provided with the cam portion 204 at a portion where the release lever 46 faces the upper end surface of the right side plate 100 of the head support 156. As shown by the solid lines in FIGS. 1 and 23, the cam portion 204 does not contact the upper end surface of the right side plate 100 when the release lever 46 is tilted leftward in the drawings, and the pair of coil springs. The urging force of 182 allows the thermal line head 154 to come into contact with the platen roller 86 with a predetermined pressure contact force, and when the release lever 46 is tilted to the right in the figure as shown by the chain line in FIG. Contacts the upper end surface of the right side plate 100 and resists the biasing forces of the pair of coil springs 182 to move the head support 15
6, the thermal line head 154 is formed so as to be spaced downward from the platen roller 86.

In this way, during the normal printing operation, the release lever 46 is set in a state of being tilted leftward in the drawing as shown in FIG. 1, and the paper P is set on the platen as described above. Roller 86 and thermal line head 15
4 is jammed at the rolling contact portion with 4, the thermal line head 154 is separated downward from the platen roller 86 by tilting the release lever 46 to the right in the figure, and the paper P is sandwiched between the two. Thus, the jammed paper P is easily pulled out backward, and the jam is released.

As shown in FIG. 11, the feed roller 8 described above is in a state of facing the first sheet conveying path F _1.
No. 4 for detecting that the paper P is inserted into the housing 12 through the first paper insertion groove 20 in a state in which it is located on the upstream side in the paper transport direction with respect to the rolling contact portion between the slide press member 192 and the slide press member 192. The first detector 206 is disposed on the rear portion 96 a of the frame body 96 that constitutes the frame 90. Further, a second detector 208 for detecting that the paper P is inserted into the housing 12 through the second paper insertion groove 24 while facing the second paper transport path F ₂ has an insertion guide section. 1
It is arranged in the horizontal portion 106b of 06. Further, as shown in FIG. 20, while facing the common paper transport path F ₀ ,
The platen roller 86 and the thermal line head 1 described above
The third detector 210 that detects that the paper P is in the common paper transport path F ₀ in the state of being positioned on the upstream side in the paper transport direction with respect to the rolling contact portion with 54 is the frame body 96 of the frame 90. It is installed in. First to third detectors 20
6, 208 and 210 are configured to be turned on when the leading edge of the sheet P passes, and turned off when the trailing edge of the sheet P passes.

Here, the first and second detectors 206, 2
Reference numeral 08 denotes a drive system 88 and a thermal line print mechanism 6
It is configured to function as a start sensor for defining the start timing of 0. In addition, the third detector 2
10 is the case where the first or second detector 206, 208 does not turn on even after a predetermined time has passed since the turn-on operation, the case where the turn-on operation continues beyond the time required for the printing operation, First or second detector 206, 208
Function as a jam sensor that detects that the paper P is jammed when the off operation does not occur even after a predetermined time has elapsed after the off operation of the thermal line printing mechanism 60.
It is configured so as to function as a cue sensor that regulates the print start timing in.

Next, the operation of the thermal line printer 10 of this embodiment constructed as described above will be schematically described.

First, when the sheet P is used in the horizontal state shown in FIG. 1, the sheet P is inserted into the housing 12 through the first sheet insertion groove 20, so that the inserted sheet P is the first sheet. Proceeding through the conveyance path F ₁ , the first detector 206 is turned on. When the first detector 206 is turned on, the drive system 88 is activated, and the feed roller 84 and the platen roller 86 are rotationally driven at the set rotational speeds in response to the drive of the drive motor 134. Then, the paper P that has dropped to the rolling contact portion between the feed roller 84 and the slide press member 192 by its own weight is nipped between the feed roller 84 and the slide press member 192 by the rotational driving of the feed roller 84, and The sheet is conveyed from the _first sheet conveyance path F ₁ toward the common sheet conveyance path F ₀ .

On the other hand, when the sheet P is used in the vertically placed state shown in FIG. 2, by inserting the sheet P into the housing 12 through the second sheet insertion groove 24, the inserted sheet P becomes the second sheet. Proceeding the conveyance path F ₂ , the second detector 208 is turned on. When the second detector 208 is turned on, the drive system 88 is activated, and the feed roller 84 and the platen roller 86 are rotationally driven at the set rotational speeds in response to the drive of the drive motor 134. Then, the feed roller 84 and the urging plate 19 of the under guide 184
The paper P that has fallen to the rolling contact portion with 0 due to its own weight is driven by the rotation of the feed roller 84.
And the urging plate 190 of the under guide 184, and is conveyed from the second sheet conveyance path F ₂ toward the common sheet conveyance path F ₀ .

Thus, according to this embodiment, FIG.
No matter whether it is used in the horizontal position shown in FIG. 2 or in the vertical position shown in FIG. 2, only one feed roller 84 is required, and the overall structure can be simplified and the size can be reduced. .

Then, the paper P inserted from the first or second paper insertion groove 20, 24 has the common paper conveyance path F.
While passing ₀ , the third detector 210 is turned on.
Here, from the time when the third detector 210 is turned on, the microcomputer 70 on the control board 68 starts driving the drive motor 14
Start counting the output time of the drive pulse signal to 0,
When the time required for the leading edge of the paper P to pass by a predetermined amount from the third detector 210 through the rolling contact portion between the platen roller 86 and the thermal line head 154 has elapsed,
The drive of the drive motor 140 is stopped, the conveyance of the paper P is stopped, and so-called cueing is performed. Then, in response to the transfer of the print information (DATA1) from the microcomputer 70, the drive motor 140 is drive-controlled to restart the transportation of the paper P, and the thermal line head 154 is synchronized with the paper transportation operation. The line print operation is started on the paper P.

When the predetermined line printing operation on the paper P is completed in this way, the microcomputer 70
After the trailing edge of the sheet P passes through the third detector 210 and is turned off, at least until the trailing edge of the sheet P passes through the rolling contact portion between the platen roller 86 and the thermal line head 154. When the required time elapses, the driving and stopping of the drive motor 140 and the conveyance of the paper P are stopped,
The so-called paper discharge operation is completed. In this way, a series of printing operations is completed.

Next, referring to FIG. 24, the structure of the above-described mounting jig 300 and the thermal line head 15 will be described.
The mounting position adjusting operation at the time of mounting No. 4 to the head support 156 will be described.

As shown by the alternate long and short dash line in FIG. 24, this attachment jig 300 includes a jig main body 302 having a U-shaped cross section, and a shaft support pin 15 formed on the head support 156 described above.
8 and 160 are formed in the same shape as these, and the pair of left and right upright pieces 302a, 3 of the jig body 302 are upright.
The shaft support pins 304 and 306 formed on the inner side surface of 02b for swingably supporting the head support 156 in an upside-down posture from the state in which the head support 156 is attached to the thermal line printer 10.
And a pair of left and right standing pieces 302a, 302b which are formed in the same shape as the platen roller 86 described above.
A dummy roller (not shown) that is hung between the dummy roller and a dummy roller that is fitted to both ends of a shaft portion (not shown) of the dummy roller and has the same shape as the bearings 112 and 114 described above. Bearing 308,
A pair of locking levers 310 and 31 for fixing the head support 156 attached to the attachment jig 300.
2 and.

Here, in this head support 156,
The thermal line head 154 has a pair of mounting screws 21.
It is temporarily fixed through 2. That is, by mounting the head support 156 to which the thermal line head 154 is temporarily fixed to the mounting jig 300, the same printable state as that in which the head support 156 is mounted on the frame 90 is achieved. become.

On the other hand, on the connection connector 214 attached to the rear end of the thermal line head 154, a collective heat generation control device 314 for collectively generating heat from the thermal line head 154 over the entire length is connected via a connection harness 316. It is connected. This collective heat generation control device 314
As shown in the figure, on the upper surface thereof, a power button 318 for turning on / off the power every time it is pushed, a power lamp 320 which lights up when the power is turned on, and the thermal line head 154 is extended to the full length by being pushed. A collective heat generation button 322 for collectively driving heat generation and an operation lamp 324 that lights up when this collective heat generation operation is being performed are configured.

The mounting jig 300 configured as described above
First, the head support 156 to which the thermal line head 154 is temporarily fixed is turned upside down from the state of being attached to the thermal line printer 10, and the pair of support openings 170 and 172 are provided with the corresponding shaft support pins 304, 172. Three
06, and the head support 156 is pivotally supported on the jig body 302 so as to be swingable. Then, with the head support 156 separated from the dummy roller in the upper direction, the paper P is inserted in between, and then the head support 156 is pushed down to lower the head support 15
6 is locked by a pair of locking levers 310 and 312 to fix the attached state.

Then, in the collective heat generation control device 314, the power button 318 is pressed to turn on the power,
After that, by pressing the collective heat generation button 322, the thermal line head 154 collectively executes the heat generating operation over the entire length thereof. As a result, the portion of the paper P sandwiched between the dummy roller and the thermal line head 154 is
Due to the heat generation operation of the thermal line head 154, one line is printed over substantially the entire width. Then, the worker pulls the paper P forward by a predetermined amount and inspects the formation state of the line.

Here, the sheet P is controlled by the batch heat generation control device 314.
The line printed above is the thermal line head 1
If the heat generation position X of the thermal line head 154 coincides with the rolling contact portion between 54 and the platen roller 86, the thickest and thickest line A ₁ is obtained. On the other hand, this line includes the thermal line head 154 and the platen roller 86.
As the heat generation position X of the thermal line head 154 becomes farther from the contacting point with the line, the lines become thinner and thinner A ₂ , A _3, ...

Therefore, the operator inspects the formation state of the printed line, and when it is judged that the line is thin and thin, the worker loosens the mounting screw 212 and moves the thermal line head 154 to the head support 156. Then, the head mounting hole 178 is slightly moved forward along the longitudinal direction of the head mounting hole 178 (that is, the conveyance direction of the paper P), the mounting screw 212 is tightened again, and the thermal line head 154 is temporarily fixed to the head support 156. In this state, the collective heat generation control device 3142 described above is activated to cause the thermal line head 154 to collectively execute the heat generation operation over the entire length thereof. After that, the paper P is pulled out further forward, and the line printed by this collective heating operation is inspected.

As a result, when the line is thicker and darker than the previously printed line, the mounting screw 212 is loosened and the thermal line head 154 is attached to the head support 156 in the longitudinal direction of the head mounting hole 178. (That is, the sheet P is conveyed in the transport direction), the mounting screw 212 is tightened again, and the thermal line head 154 is temporarily fixed to the head support 156. In this state, the collective heat generation control device 3142 described above is activated to cause the thermal line head 154 to collectively execute the heat generation operation over the entire length thereof.

On the other hand, when the line is thinner and thinner than the previously printed line, the mounting screw 21
2 is loosened, the thermal line head 154 is slightly moved rearward with respect to the head support 156 along the longitudinal direction of the head mounting hole 178 (that is, the conveyance direction of the paper P), and the mounting screw 212 is tightened again. Then, the thermal line head 154 is temporarily fixed to the head support 156.
In this state, the collective heat generation control device 3142 described above is activated to cause the thermal line head 154 to collectively execute the heat generation operation over the entire length thereof.

By repeatedly executing such a batch heat generation operation, when the printed line becomes thickest and dark, the mounting screw 212 is strongly tightened,
The thermal line head 154 is fully fastened to the head support 156. As described above, the thermal line head 154 is fully fastened to the head support 156, so that the heat generation position of the thermal line head 154 is in a state where the head support 156 removed from the mounting jig 300 is incorporated in the thermal line printer 10. The X is surely brought to the rolling contact position with the platen roller 86.

As described in detail above, this mounting jig 30
By using 0, the heat generation position X of the thermal line head 154 is surely brought to the rolling contact position with the platen roller 86, and as a result, the platen roller 86
Even if the diameter is set to be small, it is possible to achieve a desired good printing state.

Needless to say, the present invention is not limited to the configuration of the above-described embodiment, and can be variously modified without departing from the scope of the present invention.

For example, in the above-described embodiment, the manual mounting jig 3 is used to adjust the mounting position of the thermal line head 154 with respect to the head support 156.
And the thickness of the line to be printed by collectively heating the thermal line head 154, and
Although it has been described that the mounting position of the thermal line head 154 is adjusted by visually inspecting the density by the operator, the present invention is not limited to such a configuration, and the thermal position adjusting device can be used to adjust the thermal line head 154. Line head 15
It goes without saying that the mounting position of the No. 4 head support 156 may be automatically adjusted. For example, the automatic position adjusting device includes a transport mechanism that automatically transports the paper P, an imaging device that captures a line printed on the paper P via the batch heat generation control device 314, and a thermal line for the head support 156. Head 154
And a displacement mechanism that changes the relative position of the line, automatically measure the thickness and darkness of the line in the image taken by the imaging device, and the displacement is performed so that this is the thickest and darkest position. Thermal line head 154 through mechanism
The position of the head support 156 with respect to the head support 156 may be adjusted.

Further, in the above-described embodiment, the thermal line head 154 for the head support 156 is used.
It has been described that the thickness and darkness of the line printed on the sheet P by collectively generating heat are used as the criterion for determining the optimum mounting position of the above. However, the present invention is not limited to such a configuration. Needless to say, either one may be used as a criterion.

[0082]

As described above in detail, according to the method for adjusting the mounting position of the thermal line head in the thermal line printer according to the present invention, the heat generation position of the thermal line head is accurately set to the rolling contact position with the platen roller. It is possible to adjust the mounting position to the head support so that they match. As a result, the diameter of the platen roller with which the thermal line head is in rolling contact can be set small, and therefore, the thermal line printer incorporating the thermal line head and the platen roller can be miniaturized.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an embodiment of a thermal line printer according to the present invention in a horizontally placed state.

FIG. 2 is a perspective view showing a configuration of an embodiment of a thermal line printer according to the present invention in a vertically placed state.

FIG. 3 is a transverse cross-sectional view showing the internal structure of the housing 12 with the battery lid 18 removed and the upper housing portion 14 removed from the thermal line printer shown in FIGS. 1 and 2.

FIG. 4 is a vertical cross-sectional view showing a cross-sectional shape of the thermal line printer taken along the line AA in FIG.

FIG. 5 is a top view showing how the control board is attached.

FIG. 6 is a plan view showing an upper surface shape of a frame.

FIG. 7 is a left side view showing the left side shape of the frame.

FIG. 8 is a right side view showing a right side shape of the frame.

9 is a vertical cross-sectional view showing the cross-sectional shape of the frame taken along the line BB in FIG.

10 is a vertical cross-sectional view showing a cross-sectional shape of the frame taken along the line CC in FIG.

11 is a vertical cross-sectional view showing a cross-sectional shape of the thermal line printer taken along the line D-D in FIG.

FIG. 12 is a perspective view showing a positioning state of the platen roller and the head support taken out from each other.

FIG. 13 is a perspective view showing the configuration of a feed roller.

FIG. 14 is a left side view of a frame showing a gear train that constitutes a drive system.

FIG. 15 is a right side view showing a fitted state of the head support with respect to a bearing that pivotally supports the other end of the platen roller.

FIG. 16 is a left side view showing a fitted state of a head support with respect to a bearing that axially supports one end of a platen roller.

FIG. 17 is a vertical cross-sectional view of the thermal line printer showing the arrangement of coil springs.

FIG. 18 is a bottom view showing a state in which a lower housing portion, a control board, and a head support are removed from the thermal line printer to show an arrangement state of an under guide.

FIG. 19 is a vertical cross-sectional view of the thermal line printer showing a biasing state of the biasing plate of the under guide.

20 is a vertical cross-sectional view showing a cross-sectional shape of the thermal line printer taken along the line EE in FIG.

FIG. 21 is a perspective view showing the slide press member taken out from the front side.

FIG. 22 is a perspective view showing the slide press member taken out from the back side.

FIG. 23 is a vertical cross-sectional view for explaining the release operation by the release lever.

FIG. 24 is a perspective view schematically showing the configuration of an attachment jig for attaching the thermal line head to the head support in a positioned state.

[Explanation of symbols]

P paper F ₀ common paper transport path F ₁ first paper transport path F ₂ second paper transport path F _d paper discharge path SP installation space X heat generation position 10 thermal line printer 12 housing 14 upper housing portion 14a upper surface 14b front surface 14c Rear surface 16 Lower housing part 18 Battery lid 20 First paper insertion groove 22 Paper ejection groove 24 Second paper insertion groove 26 Power button 28 Power switch 30 Power (POW / CHRG) lamp 32 Online (ONLINE) button 34 Mode setting (MODE) button 36 Forced feed (FEED) button 38 Online (ONLINE) lamp 40 Font (Gothic) lamp 42 Paper-less display (PE) lamp 44 Recess 46 Release lever 48 Back cover 50 Connection connector 52 Power connector 54 Density Adjustment dial 56 Paper guide 58 Insert Entry hole 60 Thermal line print mechanism 62 Battery chamber 64 Nickel-cadmium battery 66 Spring 68 Control board 70 Microcomputer 72 EPROM 74 DRAM 76 First font ROM 78 Second font ROM 80 Opening 82 LED board 84 Feed roller 86 Platen roller 88 Drive system 90 Frame 92 Screws 94a; 94b; 94c Mounting boss 96 Frame body 96a Rear part 98 Left side plate 100 Right side plate 102 Space 104 Ejection guide part 106 Insertion guide part 106a Vertical part 106b Horizontal part 108 Shaft part (of platen roller) 108a One end Part 108b Other end part 110 Roller body (of platen roller) 112; 114 Bearing 116 First through hole 118 First driven gear 120 Recessed portion 122 Roller body (file Drawer) 124 Opening 126 Shaft part (feed roller) 126a One end part 126b Other end part 128 Second through hole 130 Second driven gear 132 Bearing part 134 Drive motor 134a Motor shaft 136 Holding part 138 Third through hole 140 Drive gear 142; 144; 146 Support pin 148; 150; 152 Idle gear 154 Thermal line head 156 Head support 158; 160 Shaft support pin 162 Support body 164 Left side plate 166 Right side plate 168 Paper ejection guide part 170; 172 Support opening 174 176 Positioning recess 178 Head mounting hole 180 Spring receiving seat 182 Coil spring 184 Under guide 186 Guide body 188 Opening 190 Energizing plate 192 Slide press member 194 Press body 194a; 1 94b groove 196 rubber plate 198 coil spring 200a; 200b slide guide 202 spring receiving seat 204 cam portion 206 first detector 208 second detector 210 third detector 212 mounting screw 214 connection connector 300 mounting jig 302 cure Tool body 302a; 302b Left and right standing pieces 304; 306 Shaft support pin 308 Dummy bearing 310; 312 Locking lever 314 Collective heat generation control device 316 Connection harness 318 Power button 320 Power lamp 322 Collective heat button 324 Operation lamp

Front page continuation (72) Inventor Katsumi Kawamura 2-36 Maenocho, Itabashi-ku, Tokyo Asahi Kogaku Kogyo Co., Ltd. Gaku Kogyo Co., Ltd.

Claims (3)

[Claims] 1. A first step of temporarily fixing a thermal line head to a head support so that its position can be adjusted, and a head support to which a thermal line head is temporarily fixed is attached to a dummy roller corresponding to a platen roller. A second step of attaching the dummy roller and the head support to the jig in a state where the relative position between the dummy roller and the head support is regulated to a predetermined position, and a third step of sandwiching the thermal paper between the dummy roller and the thermal line head. And a fourth step of collectively heating the thermal line head over the entire length, and the head support of the thermal line head based on the density and / or the thickness of the line printed on the thermal paper by the heat generation. Fifth to adjust the mounting position for
And a step of adjusting a mounting position of a thermal line head in a thermal line printer. 2. The thermal line head according to claim 1, wherein in the fifth step, the position of the thermal line head is set at a position where the printed line has the thickest and thickest line. A method for adjusting the mounting position of a thermal line head in a line printer. 3. A sixth step of fixing the thermal line head to the head support after adjusting the mounting position of the thermal line head to the head support in the fifth step, and fixing the thermal line head. The method for adjusting the mounting position of a thermal line head in a thermal line printer according to claim 1, further comprising a seventh step of removing the head support from the mounting jig.