JPS58151271A - Printer - Google Patents

Abstract

PURPOSE:To simplify a type selecting mechanism and to enhance the accuracy of a printing position, by making a deviating size of each type part to the direction of lower digits accompanied by the rotation of type wheels equal to the feeding amount of the type wheels to the direction of the upper digits by the operation of a carrying means. CONSTITUTION:A plurality of the typing parts are helically arranged on an outer surface of the type wheels 9 and 11. The type wheels 9 and 11 are rotated together with a type shaft 5 and can be slidden along the axial direction of the type shaft 5. A carrying cam 42 carries the type wheels with respect to the surface of paper 30 to be printed in association with the rotation of the type wheels. The type wheels are intermittently rotated so that respective printing part is stopped for a short time at the position facing the paper. The selected and stopped type part and the paper are compressed by a hammer 6 and the printing is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printer.
It is something to do.

Recently, electronic calculators have become more multi-functional and sophisticated, as well as being smaller and lighter9.There is also a desire for calculators with printers that can store calculation results as printed data to be smaller and lighter. Therefore, it is desired that the built-in ◆printer be small, lightweight, and consume low power. In addition, as a printer built into this kind of electronic equipment used in general households, the easily available and inexpensive 38mm@Merui [
Since a roll of plain paper 1P with a width of 58 mm can be used and the printed data is clear, it is desirable to use the matrix printing method, and it is also required that the number of driving sources is small and it is inexpensive.

The present invention has been developed in view of these points, and will be described below with reference to FIGS. In order to explain this printer, we will first give a general overview of the overall printer configuration, then we will explain the 11B configuration of the printing section, the printing selection mechanism, the printing/adjustment mechanism, the slider return mechanism, the paper feed mechanism, etc. do.

[Schematic configuration of the entire printer]

Figure 111 shows a schematic diagram of the entire printer.

Two 141 plates 1m and lb are arranged facing each other, and a guide rail part 3 having a sliding #I2 curved between L and side plates la and ib is located at the lower part of this side between these sides *1a and 1b.
It is formed integrally with the horizontal, is, and lb. Furthermore this @
A rack 4, a type shaft 5, a hanger iε, a paper feed 9 shaft 7, etc. are installed from the front side in a width of 1 m and a distance K between lbs. It is formed integrally with lb.

On the type shaft 5, the first type wheel 9ttlcJIL friend first wheel 10 containing the type part of the symbol digit and the second type part 11' containing the type part of the numerical digit are fitted.
2 are spline-coupled.

A type position sensor 13 is attached to the left end of the type shaft 5 to detect the rotation angle of the type shaft 5 and perform a type selection operation. Slider 14 placed on the guide rail section 3
The arm s15 engages with the ag2 wheel 12 and the carry cam 42 and slides on the type shaft 5 and guide rail 3 on the p%$2 wheel 12 and slider 14 in the same way.

The peripheral surface of the ink roller 16 is resiliently connected to the circumferential type portions of the first type wheel 9 and the second type wheel 2, and the ink tube is applied to the type portions.

The right end of the type shaft 5 passes through the @ plate 1b and the print gear clutch 17 and is connected to the print gear 18.

A paper feed roller 1s is fixed to the paper feed shaft 7, a paper feed gear 20 is connected to the right end of the paper feed shaft 1, and a paper feed control gear 21 is connected between the paper feed gear 20 and the printing gear 18.
is mediated.

A drive motor 22 is mounted and fixed on the motor mounting portion 8, and this one motor 22! One? A series of print operations such as 8-character selection operation, print/carry operation, slider return operation, and paper feed operation are performed. A pinion gear 23 fixed to a drive shaft of a motor 22 is connected to a printing gear clutch 11 and a printing gear 18 via an idler gear 24 and a printing gear drive body 25.

The right end of the clutch 4 is connected to the printing gear clutch 17&C via the rack control lever 26. A trigger solenoid 27 is attached to the outer surface of the side plate 1b, and the tip of the 7 actuator 28 is connected to the printing gear clutch 17&C via the rack control lever 26. the slider 14 adapted to engage with the printing gear clutch 11;
One end of a return spring 29 is connected to the spring 29, and the tensile force of this spring 29 causes the first carriage 14 and the second wheel 12 to move to the home position side (@plate 1b, fill).
is always elastically biased.

The paper 30 to be printed is inserted horizontally through the gap between the motor mounting section 8 and the paper guide plate 31 (see N in Fig. 35) disposed below, and the paper 30 is inserted horizontally through the gap between the motor mounting section 8 and the paper guide plate 31 (N in Fig. 35). In collaboration with U32, it was sent to Type Wheel 9,11111. Then, since the type selected by type wheel 9 (11) is stationary at a position facing the paper 30, the hammer 6 presses it against the paper 30t - type wheel 9 (11) illll and selects the next type. Printing is done.

The series of basic operations of this printer consists of a type selection operation, a print/carry operation, a slider return operation, and a paper feed operation, and each of these operations' is repeated nine times in a 7-kensial manner. K11l Multi-line /lint is performed ◎ Each of the above-mentioned operations and related mechanisms will be explained in detail, but first, the structure of the type part will be explained.

[Composition of type section]

The type section is composed of the first type wheel 9 held by the N1 wheel 10KN and the second type wheel 11 held by the second wheel 12 as described above. On the outer periphery of the first type wheel 9, there are provided symbol printing portions for each type of symbol to be printed on the symbol digit, and the arrangement of the printed characters 1I33! The letters a are placed on the same circumference at a certain distance apart, similar to a normal type wheel.

The #Il wheel 10 is located at L5 shown in FIGS. 2 and 3, and includes a type conversion part 34, on which the first type wheel 9 extends, and two opposing parts provided on the side plate 1b side thereof. It is mainly composed of an elastic circumferential wall 35 and two opposing locking legs 36 that fit in the same axial direction inside the arcuate circumferential wall 35. The above-mentioned type holder part 34Kr! Detent recesses 3 at predetermined intervals along the circumferential direction near the outer periphery of the
7 are provided, and on the other hand, on the circumference of the first type ring 9, there is a rotation preventing protrusion 38 that fits into this recess 31 (see FIG. 3).
A plurality of recesses 37 and projections 38 are engaged with each other to position the first type wheel 9 on the W41 wheel 10.

The printing gear 18 is provided with a cylindrical portion 39 extending in the axial direction, and a sliding recess 40 is formed oppositely near the tip of the cylindrical portion 39. @&
It is inserted from the outside to the inside of 1b. The bent end portion of the locking leg 36 of the first wheel 10 is slidably fitted into the sliding recess 40, and the amount of movement of the first wheel 10 is regulated by the sliding recess 40 and the side plate 1bK. (will be described in detail later)0 At the connection point between the type ring fitting part 34 of the first wheel 10 and the side plate 1b, the wJ1 wheel 10 (
IKI type wheel 9) with upper digit I411Vc! 1f67'
A jth suppression spring 41 is inserted. Note that this suppression spring 41 KU and a return spring 29 spring are used.

m2 wheel 12$1 2nd eNK display f! UK, l11
The 11 wheel 10 work 9 is also composed of a wide type wheel fitting part 43, a small diameter arm part engaging groove part 44 sequentially provided on the upper digit side, and a spur cam drive gear 45. It is composed of A plurality of anti-rotation recesses 46 are provided near the outer periphery of the type ring fitting portion 43 at predetermined intervals along the circumferential direction. Note that the first wheel 10
In addition, the central through hole of the KK2 wheel 12 has an oval shape that matches the outer shape of the type shaft 5 so that they are spline-fitted with the type shaft 5. Next, it is held by the WX2 wheel 12! 2 print import 1
1 will be explained using the tubes in FIGS. 4 and 5. #
! 4 is a perspective view of the second type wheel 11, and FIG. 5 is a developed view of the outer peripheral surface showing the arrangement of the type portions in the second type wheel 11. The inner circumference is marked with #! A plurality of round p stop convex parts 47 are provided which fit into the rotary p stop recesses 46 of the two wheels 12.
and the second on the wheel 12 for engagement of the convex portion 47.
The type wheel 11 is positioned.

On the outer periphery of the second type ring 11, for example, "
Numbers 0'' to r9J and typed parts 33 such as [・J, r-J, etc. are provided, but their arrangement is helical as shown in Fig. 4 and Fig. 5. .

To explain in more detail using FIG. 5, the printed part 33a of the number rOJ is provided at the lowest digit, and then the number [month printed part 33bS] is provided at a constant pitch toward the upper digit.
Number “2” printed portion 33C5 Number “3” printed portion 33d
, numeral “4” printed portion 33C1 numeral “5” printed portion 33
f1 number r6J type part 33g1 number "7" type part 3
3h, a printed portion 331 with the number “8” and a printed portion 33j with the number “9” are arranged in sequence, followed by a printed portion 33 with the number “9”.
, a type portion 33 corresponding to the size of one type portion 33
The "-" type part 3 is inserted through the blank part 48 for blank printing, which is at risk of slider return and paper feeding.
31 are provided. This last "-" type part 33
1 is located on the most significant digit side of the second type ring 11, and the distance 1 between the character 33 and the number ``0'' located on the lowest digit side is approximately one inch with the carry pitch P. (12/13
x P ). Therefore, this second type wheel 1
There are 13 printed characters in 1K including the blank portion 48, and these are provided on the upper digit side with the printed characters 331 as a reference, and the operation will be explained in a later section.

Next, the type selection mechanism will be explained.0 [Print type selection mechanism] First, the drive mechanism for the type shafts 9 and 11 will be explained. As shown in FIG. 1, driving force is transmitted from the motor 22 to the type shaft 5 via a pinion gear 23, an idler gear 24, a print gear drive body 25, and a print gear 18.

The pinion gear 23 and the idler gear 24 are ordinary spur gears, and the end face K of the pinion gear 23 is integrally V-shaped with a disc portion 4B for preventing removal.

The printing gear driving body 25 is the ninth one that transmits the driving force from the idler gear 24 to the printing gear clutch 1T and the printing gear 18, and has a substantially cylindrical shape as shown in FIGS. 7 and 8. A flat trout wheel portion 50 that meshes with the idler gear 24 is provided on the base side of the printing gear drive body 250.One tooth groove of the spur gear portion 50 is different from the other tooth grooves and extends slightly in the axial direction. and print gear clutch 1
An extension groove 51 is formed to engage with 1.

A crescent-shaped protrusion 52 having a #1 crescent shape in plan view is formed in approximately the center part K of the head of the printing gear drive body 250, with a part cut out into a fan shape and leaving a small arc-shaped circumferential surface. ing. A feed bottle 53 having approximately the same height as the crescent-shaped projection 52 is provided on the opposite side of the small circumferential surface of the crescent-shaped projection 52 . Two 'removal prevention bins 54 are protruded from the small circumferential surface side of the crescent-shaped protrusion 52 at positions symmetrical to the zero line, and these bins 54 are designed to be slightly lower than the previous station delivery system bin 53. . The crescent-shaped protrusion 52, the feed bin 53, and the detachment prevention bin 54 engage with a portion of the printing gear 18. As shown in FIG. 7 and FIG. 8, a central recess 55 is formed from the base 9Ml1li11 surface of the printing gear drive body 250 toward the head, and this central recess 55 is protruded from a predetermined position on the outer surface of the side plate 1b. A printing gear drive body 25 is rotatably supported to fit into a support bin (not shown). Note that the idler gear 24 is also attached to the side plate 1b.
A support bottle (not shown) K protruding from a predetermined position on the outer surface of the
Therefore, as shown in Figures 18tiM2, 9, and 10, an oval-shaped fitting hole 56 is formed in the center to which the right end of the type shaft 5 is firmly connected. , the type shaft 5 is machined by this strong fit and has a substantially disc-shaped rotated driven part 57 that engages with the head of the print gear drive body 250 at the outer end of the 0 print gear 18 that rotates integrally with the print gear 18. is provided. This rotationally driven part 5
7, as shown in FIG. 9, a deep groove 58 and an arcuate piece 59 extending from the outer periphery toward the center are provided along the circumferential direction.
Three pieces are provided alternately, and this number is the same as the first printed letter 9 and the second
The number matches the number of character portions 33 of the type wheel 11 (both type wheels 9 and 11 each include one blank portion that does not directly participate in printing). The head of the printing gear driving body 25 and this rotated driven part 57 and the state of engagement will be described later in the 11th section.
A cylindrical portion 61 having one notch 60t on the outer periphery (FIG. 9) and a spur gear portion 62 are sequentially formed on the same axially inner side of the rotated driven portion 51, which will be explained using a diagram. σ) The cylindrical portion 39 is provided inside the spur gear portion 620. This cylindrical portion 3B is connected to the central through hole 63 of the printing gear clutch 1T.
As shown in FIG. Crescent-shaped protrusion 52, feeding bin 53, and removal prevention bin 5
The positional relationship in the axial direction of 4 is shown by the dashed line in the figure.
Rotation driven part 57σ) Crescent-shaped protrusion 5 provided on the head
2 and the feed bin 53 are relatively long, so
A deep groove 58 is formed in the vertical pin 53 so that the outer periphery lii of the crescent-shaped protrusion 52 comes into sliding contact with the four outer periphery surfaces 64 of the circular arc piece 59.
It is supposed to reach and engage with it. On the other hand, since the detachment prevention bottle 54 is relatively short, it does not reach the deep groove 58, but its tip reaches close to the circular surface 65g of the rotationally driven portion 51σ), and is therefore at a position where it can face the circular convex surface 66 of the arc piece 590. The arc piece 59Q) can be attached to the leading edge part. In addition, the crescent-shaped protrusion 52 and the detachment prevention bottle 54
The distance between the circular arc piece 59g) is slightly longer than the wall thickness at the tip.This printing gear 18 and the printing gear drive body 25 constitute a Geneva mechanism, and then the printing gear drive body How the printing gear 18 is driven by the drive force transmitted from 25 to 18.
0 The motor 22 rotates in response to a print start signal from a control unit (not shown), and the printing gear drive body 25 rotates through the pinion gear 23 and idler gear 24t. Rotate in the direction of the arrow as shown in Figure 11 B). When the feed bottle 53 is engaged with the open end of the deep groove 58, the feed bottle 53 is moved to the deep groove 58 as the print gear drive body 25 rotates.
158 while gradually entering the printing gear drive body 25g
) 1V printing gear 18 (rotated drive part 57
) t - (b) movement in the direction of arrow B 0 At this time, the outer periphery 1164 of the arcuate piece 59 rotates while contacting the outer circumferential surface of the crescent-shaped protrusion 52 . As shown in FIG. 11(A), the feed bottle is moved at the same time as the feed bottle 53 enters the depth #58, or slightly delayed, so that one of the release prevention bins 54 leaves the arcuate piece 590) @ end. 53 and the removal prevention bottle 54 are set in a positional relationship.

As the feed bin 53 moves, the printing gear 8 (rotated drive unit 51) rotates in the direction of arrow B.
At 3, it once entered the back of the deep throw 58, and then passed through to the opening side again, and the rice was also there. Then, as shown in FIG. 11(b), when the feed bin 53 leaves the opening end of the depth #458, one of the detachment prevention bins 54 is released at the same time or at a slightly earlier timing.
enters inside the arc piece 540. The print gear drive body 25 continues to rotate in the direction of arrow A, but the feed pin 153 is
Printing gear 8 (rotated driven part 51) to separate from 158
It will remain stopped. Then, as shown in FIG. 11e, the two anti-separation pins 54 successively rotate inside the arcuate piece 590, respectively. The printing gear drive body 25 is shown in Figure R11 (
When it rotates once from the state of (a), it enters the next depth #$58 in the feed bin 53 at f, and again intermittently rotates the printing gear 8 (rotated driven part 57) by the - foot angle.

In this method, at least two anti-separation bins 54 are provided at a predetermined interval on the opposite side of the feed bin 53, and the feed bin 53 is
Immediately before the bottle 53 enters the R11l 58 and just before it comes out of the depth #1I58, the detachment prevention bottle 54 is engaged with the arcuate piece 5S. 25 can be reliably maintained, and the intermittent drive characteristics of the printing gear 18 can be stabilized. Particularly, the function of the detachment prevention bin 540 is effective when the printing gear 18 and the printing gear driving body 25 become smaller in diameter as printers become smaller.

As described above, the printing gear 18 is driven by the printing gear driver 25.
The printing gear 18 is driven intermittently, but during one rotation of the printing gear 18, rotation and rest are repeated 13 times, and the printing gear 1
The positional relationship between the type wheels 9, 11 and the printing gear 18 is such that the type portions 33 of the first type wheel S and second type wheel 11 face the hammer 6 when the type type wheel 8 (type shaft 5) is stationary. is set.

Since the type position sensor 13 is fixed to the left end of the type shaft 5 as shown in FIG. The selection of the first type character-9 as well as the second type wheel 11 can be made. It should be noted that while this character selection is being performed, the trigger lens 27 (see Figure II''1) is in a non-excited state.The zero-order printing/carrying mechanism will now be described.

[Print/carry mechanism]

The printing gear clutch 11 interposed between the side plate 1b and the printing gear 18 controls the rotation and rotation of the printing shaft 5 and the printing gear 18.
The central through hole 63 of it and the cylindrical part 39 of the printing gear 1B are arranged so that it rotates and stands still at a predetermined timing regardless of whether it is stationary.
The dimensions are designed to prevent a tight fit.

The part of the printing gear clutch 17 closest to the side plate 1b・K
tlX, a hammer drive cam portion 67 is provided that protrudes in one direction in the radial direction. A spur gear portion 69 having a missing tooth portion 681 on a part of the outer periphery of the hammer drive cam portion 61 in the axial direction; A locking portion 74 facing in the rotational direction and having a first locking end T2 at a position 11 slightly shifted in the circumferential direction and a second locking end T3 slightly lower than the first locking end T2; A timing cylinder portion T6 having a depression R75 at a location is sequentially provided.

The hammer drive cam portion 67 of this printing gear clutch 11
K is always in elastic contact with the tip of a suppressing arm 11 which is protruded from the end of the side plate 1bll of the hammer 6 so as to extend substantially horizontally. ...On the front side of the lemma 6, as shown in Figure R2, a symbol digit stamp 4117B and a numerical digit stamp *79 are placed at a distance of 19 that protrudes slightly, and between the two, a mask portion 80, which will be described later, is placed on the type shaft 5Il. A cutout portion 81 located at 6 is formed. Support bottle insertion holes 8 are provided at both upper ends of the hammer 6.
Support bins 83 (see FIGS. 15 and 16) are formed with 2 support bins 83 and project from the side plates 1a and 1b, respectively.
t- The hammer 6 is inserted into the insertion hole 82, and the hammer 6 is inserted into the insertion hole 82.
4118, lbK rotatably supported. @ Figure 15 The work shown in Figure 16 is a tension spring 8 at the bottom of the hammer 6.
4 is connected to one end, and the other end Is is connected to a motor mounting portion 8 as shown in Figure 1. Therefore, due to the tensile force of the tension spring 84 ↓9, the support pin 83 is urged to rotate around the center of the hammer 6 so that the tip of the suppression arm IT always comes into elastic contact with the cam surface of the hammer drive cam section 67. There is.

The spur gear portion 69 of the printing gear clutch 1γ is engaged with the spur gear portion 50 of the printing gear drive body 25, and also fits into the extension groove 51 of the printing gear drive body 25 into the tooth portion TO of the minus gear portion T1. It looks like this.

The first locking end 72 of the locking cam portion T4 is adapted to engage one claw portion of the rack control lever 260;
This will be explained later in the section [Slider return mechanism]. The locking end 13 of the locking cam portion 14 is connected to the first
The trigger solenoid 27 is attached to the outer part of the side plate 1b as shown in the figure with screws 85, and the actuator 28 is attached to the support shaft 86t. −
It is loosely fitted onto the support shaft 86 so that it can rotate about the center, and both ends are respectively locked to the base end of the actuator 280 and the lower end of the actuator 280, and the actuator is attached to the biasing spring 81. The distal end portion of 28 is elastically biased in the direction shown by the solid line to engage with the second locking end T3 of the locking cam portion T4.

The teeth of the paper feed control gear 210 fit into the falling groove 75 of the tie writing cylinder section 16 located at the outermost @VC of the printing gear clutch 11, but this will be explained later in [Paper Feed II Structure]. ] The arm portion 15 extending toward the type shaft 5 on the slider 14
As shown in Figure 2, there is a recessed wheel connecting part 88 on the tip side of the arm that fits into the arm In fitting groove 44 of the @2 wheel 12 to allow rotation of the @2 wheel 12. A cam 42t is provided on the spar and a cam holding portion 89 is provided on the spar in a recessed shape for rotatably holding the spar 42t. The slider 140 is placed on the guide rail portion 3 having a sliding groove 2t as shown in FIG. Striped sliding #12
two clamping claws 91.9 that slidably clamp the outer edge 90 of the
1 is provided protrudingly. One of the clamping claws 91 enters the sliding groove 2 and clamps the outer edge 90 of the slider 14
Even if it reciprocates on the kite rail part 3 at high speed, it can move properly without falling off. At the top of the slider 14, as shown in FIG. 1, there is an ink roller support shaft 92.
92 is provided in a protruding manner, and the ink roller 16 is rotatably supported by this. One end of a return spring 29 is connected to the ink roller support shaft 92 on the side of the 1iil plate 1b.

As shown in FIG. The girder that meshes with the drive gear 45 is a cam driven *wheel 94 on top.
and a carry screw portion 95 are integrally provided. In this embodiment, due to space considerations, the number of teeth of the carry cam driven gear 94 is half the number of teeth of the cam drive gear 45, and the second wheel 12 (second type wheel 11
) rotates once, the carry cam 42 rotates twice.

As shown in FIG. 19, the pitch Ps of the screw 96 provided outside the screw part 95 is half the carry pitch P, as shown in a developed view in FIG. Further, the direction in which the screw teeth 96 extend and the direction in which the characters are arranged from the character part 331 to the character part 33j are opposite to each other as shown in FIG. This screw *9 &
[? K is designed to mesh with the rack teeth 97 of the hook 4, but the pitch of the rack teeth 97 is also half of the pitch P. This rack *91 is installed over a length that spans the range of movement of the second type wheel 11, in other words, the area of numerical digits. It is a figure which shows the positional relationship of the 1st type|mold wheel 9 and the 2nd type|mold type wheel 11 in the printing|printing waiting iso shape m. The paper 30 is interposed between the type ring 9.11 and the hammer 6. The return spring 29 (not shown) KL is pushed back toward the home position by the type wheels 9 and 11, and as a result is compressed by the suppression spring 41,
The home positions of the first type wheel 9 and the second type wheel 11 are determined by the tips of the first type wheel 9 and the second type wheel 11 coming into contact with the circular surface of the side plate 1b. At this time, as shown in the figure, the paper 3 is placed on the first type ring 9.
It faces the symbol digit striking wall 18 of the hammer 6 through 0t, and the second @-shaped ring 11 faces the mask part 80.

As mentioned above, the so-called Geneva mechanism 19 between the printing gear drive body 25 and the printing gear 18 is connected to the first motor 22 by power transmission.
The type wheel 9 and the wJ2 type wheel 11 are rotated intermittently, and first type selection is made on the first type wheel 9. Explanation from this type selection to printing operation will be explained with reference to the timing chart shown in FIG. VIc11422.

As explained earlier, the first type wheel 9 is intermittently rotated so that each character part 33 thereof is in a position facing the paper 30 (hammer 6) for a short time or remains stationary, and each time it rotates, A timing pulse is outputted by the type position sensor 13 at each time. As shown in FIG. 23, when the K is not in a printing operation, the missing part 68 of the printing gear clutch 17 is facing the printing gear driving body 25, so there is no meshing relationship between the two, and therefore the printing gear driving body 25 is not engaged. Although it is constantly rotating in the direction indicated by the arrow, it remains stationary due to the printing gear clutch 11. Lf) Type selection is performed by counting with the pulse signal tube control unit from the type position sensor 13 mentioned above.
In Fig. 2, for example, if you want to print the fourth character "xJ" from the left, in this embodiment, if the character 33 of the second "◇1" two places before it is After stopping at the opposite position, the trigger solenoid 27 is energized at the same time as the next rotation starts.As shown in FIG. Stop cam part T4
The printing gear clutch 11 is engaged with the second lock 1473 of
The quiescent state of mt-maintains. Then, by energizing the trigger solenoid 21 at the above-mentioned timing 19, the actuator 28 rotates as shown by the dotted line against the tensile force of the biasing spring 87, and the actuator 28 and the second locking end T3
When the 0m-shaped gear clutch IT is in a stationary state, the hammer drive cam portion 61 of the 0m-shaped gear clutch IT is in a resting state, as shown in FIG. Therefore, when the tip of the actuator 28 comes off the silk 2 locking end 13, the printing gear clutch 19 rotates slightly in the direction of arrow C due to the pressing force of the printing gear clutch biasing spring 9B. Along with this, as shown in FIG. 5, the rotating printing gear drive body 2
One gear part 1 of the gear clutch 17 is printed on the extension groove 51 of 5.
The teeth 10 of 1 are engaged and rotated in the direction of arrow C by the rotational force of the printing gear drive body 250.
The flat gear part 69 of 1 is the spur gear part 50 of the printing gear drive body 25.
The rotational driving force of the printing gear driving body 250 is transmitted to the printing gear clutch 11 and subsequently rotated in the direction of arrow C.

With this rotation, the tip of the pressing arm 71 of the hammer 6 rides on the cam surface of the hammer drive cam portion 67 in the printing gear clutch 11.The printing gear clutch 11 then rotates, causing the hammer 6 to pull. spring 84
The support pin 83 rotates in the direction indicated by the arrow, against the tensile force of the support pin 83 . As shown in Figure 16, the tip of the suppressing arm TI almost runs over the top of the hammer drive cam section 61 and the selected type section 33 is stationary at a position facing the paper 30. At this time, the paper 30 is pressed against the type portion 33 by the symbol digit striking wall T8 of the hammer 6, and symbol digits are printed. When printing this symbol digit, other parts of the paper 30 are also pushed toward the type shaft 5 side by the numerical digit hitting wall 79, but as described above, the second type ring 11
Since the paper 30 faces the paper 30 and is placed behind it, the paper 30 does not directly touch the #I2 type wheel 11. As mentioned above, II! Since the first type wheel 9 is rotated intermittently, the timing of the type wheel 9 and the hammer 6 is determined so that the paper 30 comes into contact with the type part 33 when the true type wheel 9 is stationary. This also applies to the U@2 type wheel 11.

Since the trigger solenoid 27 is energized only for a short time,
After excitation, the restoring force of the biasing spring 81 is used to activate the actuator 7.
The distal end portion of the locking cam portion 74 comes into elastic contact with the circumferential surface of the rotating locking cam portion 74, and then comes into sliding contact in the next state. Then, while the printing gear drive body 25 rotates three times, the printing gear clutch 1
T is at a rate of one rotation, and printing gear clutch 1
1 rotates once and returns to its original position, the tip of the actuator 28 is inserted into the second locking end 13 (see Fig. 17).
At the same time, as shown in FIG. 23, the toothless portion 68 of the spur gear portion 69 faces the printing gear skeleton 25, cutting off the power transmission and coming to a standstill.

As will be explained later, in the state before the printing of the numbered digits, the rack 4 is in position and is not engaged with the carry cam 42.

Then, when the printing gear tartar 11 completes one revolution for symbol digit printing, the rack 4 and the carry cam 42 engage. As it rotates, the second wheel 12 (second type wheel 11) and carry cam 42 also rotate, but at this time, the rack 4 and carry cam 42 rotate as described above.
Since these are not engaged, the second wheel 12 is not carried up, and the first wheel 10 (first type wheel 9) is pressed against the symbol digit position. Subsequently, the type shaft 5 turns once and then turns twice, and the carry cam 42 engages with the rack 4 and rotates twice, and the slider 14 moves upward against the tensile force of the return spring 29. Move one digit to the digit side. As a result, as shown in FIG. 2, the second type wheel 11 comes off the mask part 8o and moves through the paper 30 at a distance aCt corresponding to the first digit of the numerical digit of Han i6 - T9. There is. Furthermore, the second
As the wheel 12 moves toward the upper digit, the @1 wheel 1o is suppressed, and due to the pressing force of the spring 41, the @1 wheel 1o is depressed.
The K upper digit ll1lK is pushed, and as shown in the 1m3 diagram, the portion 36 engages the printing gear 184C in the locking position of the 2nd wheel 1o.
The first
Movement of the wheel 10 is stopped. At this stop position, the first type wheel 9 faces the mask portion 80 as shown in the 21st factor, and #! until the subsequent printing of numerical digits is completed and the slider 14 returns to the home position.
1 type wheel 9 has this much & IC 1? Therefore, the mask part 80 is not involved in printing.

Next, the type selection is made on the ri second type type screen 11,
The printing operation continues. The second type wheel 11 is also the first
Similar to the type wheel 9, each of the seven type parts 33 stops for a short time when facing the paper 30, and then rotates intermittently, and based on this, timing is generated and the trigger solenoid 2T is energized during the printing operation. , printing gear clutch 170 rotations, hammer 6 operation, type section 33 and paper 3
The timing of contacting (printing) 0, etc. is the same as in the case of the first type wheel 9 shown in Figure 22, so the explanation thereof will be omitted.

Type selection and printing operations are performed while the @22 live ring 11 rotates once, and if the character is changed, the @22 live ring 11 will print one character each time one digit is printed.
The second type wheel 11 rotates, and when one rotation is completed, the second type wheel 11
has already been moved to the next higher digit. That is, the second
A carry cam 9 is attached to the second wheel 12 held on the type wheel 11.
5 are engaged, and while the second wheel 12 (second type wheel 11) makes one revolution, the sparge 950 engages with the rack 4 and makes two revolutions. As a result, the wi2 type wheel 11, the second wheel 12, and the slider 1 resist the tensile force of the return spring 29.
4. The assembly of the ink roller 16 and the carry cam 42 is moved to the upper digit side by one digit. As the carry cam rotates 420 times, the position of the second printing part 11 with respect to the paper 30 gradually shifts toward the upper digits, so the printing part 331 is arranged simply on the same circumference as the 159 of the first printing part 9. In this case, the printing position may be uneven depending on the rotation angle of the selected type part 33, or in other words, the second type wheel 11 (as the rotation angle increases, the print position moves to the upper digit side), and the next print position. In order to prevent this from happening due to the spacing between the 1112 type wheel and the 11
type layout is taken into account. In Figure 19, arrow D
[The above figure shows the rotation direction of the cam 950.] The screw teeth 96 are inclined in the L direction with respect to the rotation direction, and are effective in meshing with the rack teeth 91 of the rack 4 and rotating twice in the D direction. , the slider 14, the second type ring 11, etc. are gradually moved up by one digit. On the other hand, the characters of the second type wheel 11 are arranged in an inclined manner as shown in FIG. The lower digits @VC are gradually shifting. Therefore, the carrying cam is gradually carried up by 950 rotations to the second type wheel 11, but correspondingly, the typed portion 33 is gradually shifted toward the lower digits, so as a result, any typed portion 33 is It comes to rest at 15, which is opposite to the position of foot 30, and the selected character portion 33 is printed. In this way, printing and carry for one line are performed, and the next slider return and paper feed operation are performed.

[Slider return mechanism 2 paper feed III model] Top view and front view. The upper part of this paper feed control gear 21 (
When assembled, three-toothed gear portions 99 having three tooth portions are provided at intervals of 180t in the circumferential direction (around the side plate 1bli as shown in Figure 2). Three-tooth gear part 99 and three m
A toothless part 100 is formed on the tip side between the gear parts 99, and a lock part 101 having the same aspect as the tip circle of the three-thin gear part 99 is provided on the root side between the two gear parts. Missing tooth part 10
0 and the lock portion 101 are stepped.

Beneath this lock portion 101, two spring resilient claws 102 are provided at intervals of 180t to protrude outward in the radial direction, and further below this, two single-turning claws 103 are provided at intervals of 180t in the same manner. It protrudes radially outward. Below the lever rotation pawl 103, a first recessed tooth portion 104 consisting of one tooth portion is provided at an interval of 180t, and below that, toothless portions are provided at positions corresponding to the first recessed portions 104. 1
A spur gear part 106 having a diameter of 05 is formed, and a second depressed part 107 consisting of one tooth part is provided at an interval of 180t below the spur gear part 1'06.

To briefly describe the engagement relationship between each part of the paper feed control gear 21 and other members, the three-gear portion 99
As shown in FIG. 26, it meshes with a paper feed gear 20. As shown in the drawing of the spring elastic contact claw 102102KHl1, the tip of the paper feed control gear urging spring 108 is brought into elastic contact, thereby being urged in the direction of arrow F. The paper feed control gear replacement spring 10B is supported by a pin (not shown) protruding from the outer surface of the side plate 1b at the base thereof. The lever rotation claw 103 is machined in Fig. 29 and No. 30.
The 1111 depressed portion 104 is machined in FIG. 31 so as to engage the L rank control lever 26 shown in the figure.
As shown in FIG. 2, it engages with the tie-building cylinder portion T6 of the printing gear clutch 17. In addition, the spur gear portion 106 is fitted with the second recessed portion 107 as shown in FIG. 35 in order to mesh with the spur gear portion 62 of the printing gear 18 as shown in FIG. It is adapted to engage with the cylindrical portion 61 of the printing gear 18 in this manner. The detailed operation of each part and the binding relationship will be described later.

As shown in the second factor, the rack control lever 26 is formed with a support shaft insertion hole 109 extending in the axial direction at the center thereof, and the side plate 1bK
By inserting the provided spindle (not shown) into the spindle insertion hole 109, the one-rack control lever 26 is rotatably supported by the inclining plate 1bK. 1 paper feed II! on the tip end side of the rack control lever 26! The first claw portion 110 that is kicked down by the lever rotation claw 1G3 of the J gear 21
The first locking end T2 of the printing gear clutch 11 is located slightly rearward in the axial direction.
A second pawl portion 111 with #M1 in the center protrudes, and a return pawl 112 formed on the arcuate circumferential wall 35 of the @1 wheel 1o protrudes axially rearward from the second pawl portion 110. ◆A third claw portion 113 is provided in a protruding manner.

Further, as shown in FIG. 2, an engagement pin 114 extending parallel to the axial direction of the rack control lever 26 is integrally provided diagonally below the @a claw portion 113. This retaining pin 114
29 and 3o, it is inserted into a pin 111115 formed on the side surface of the rack 4 so as to be rotatable and movable.

Next, the slider return and paper feeding operations will be explained.

In order to return the slider 14 and the like to the home position after one line of printing is completed, the blank portion 48 of the second type wheel 11 is selected and a printing operation similar to that of the normal type portion 33 is performed. However, during printing operations other than this blanking operation, the frame, 1I32 and 35
As shown in the figure, the first depressed tooth portion 1 of the paper feed 9 control gear 21
04 is the depressed groove T5 of the printing gear clutch 11, and the second depressed tooth portion 107 of the paper feed control gear 21 is the notch yjs 60 K of the printing gear 18. . That is, the printing gear 18 is always intermittently rotated, and the three-way printing gear clutch 17 rotates by VC1 during printing operation, but when the first recessed tooth portion 104 faces the recess #I75,
Summary 2! When the second recessed portion 101 is in sliding contact with the horse surface of the cylindrical portion 610, or conversely, when the second recessed tooth 1s107 is facing the notch 60, it is in sliding contact.

The paper feed control gear 21 shown in FIG.
Although it is rotationally biased in the direction of arrow F by 08, the above-mentioned 1 II! 1 falling tooth part 104 is the tie-building cylinder part 7
9 protruded on the circumferential surface of 6, or the depressed tooth part 10 of the thread 2
1 is stuck on the circumferential surface of the cylindrical portion 61, rotation of the paper feed control gear 210 is prevented.

On the other hand, the relationship between the spur gear portion 62 of the printing gear 18 and the spur gear portion 106 of the paper feed control gear 21 before the slider return operation is such that the spur gear portion 62 is connected to the paper feed control gear 21 as shown in factor 1 of @33. Since the printing gear 18 faces the toothless portion 105, the rotational driving force of the printing gear 18 is not transmitted to the paper feed control gear 21, and the printing gear 18 remains stationary.

The engagement relationship between the paper feed 9 control gear 21 and the paper feed gear 20 before the slider return operation is shown in the cumulative diagram and the 27th
The situation is as shown in the above.

Before explaining this engagement relationship t', the shape of the paper feed gear 20 will be described using Figures 2, 26, and 27. On the outer periphery of the paper feed gear 20, two long tooth portions 116 having the same size as the axial length of the gear 20 and one short width tooth portion 117 having a short axial length of the paper feed gear 20 are alternately provided. There is. Before the slider return operation, this short width tooth portion 111 enters into the missing tooth portion 100 of the paper feed control gear 21, and the lock portion 101 of the paper feed control gear 21 engages the long width tooth portion 116 and the adjacent long width tooth. 116. Therefore, there is no engagement between the paper feed control gear 21 and the paper feed gear 20, and the paper feed gear 20 is locked by the lock portion 101 so as not to rotate, and the paper feed roller 19 and the paper feed driven roller 232 to maintain a stationary state.

When performing a slider return, the blank portion 4 of the second type wheel 11 is moved based on a return command signal from the control section.
8 is selected and blanked. When this blank portion 48 is selected and faces the paper 30, the notch 60 of the L-shaped printing gear 18 shown in FIG. 11 rotates, and as shown in FIG.
Facing 4. Then, the paper feed control gear 9 control gear biasing spring 108 does not lose its support to the paper feed control gear 21 (see Figure M).
With the elasticity of , the first recessed tooth/portion 104 has a recess of
Then, the second depressed teeth 107 are depressed into the notches 50, respectively. As the print gear clutch 110 continues to rotate, the slip-in part 104 is pushed by the end face 118 of the drop-in groove 15, and the paper feed 9 control gear 21 rotates slightly in the direction of arrow F. During this rotation, the printing gear 18 is i! 360. from the position shown in Figure 35 in the direction of arrow B. /13K intermittent rotation,
Furthermore, since the notch 60 is formed with a predetermined width in the circumferential direction, the paper feed control gear 21 can rotate without any problem.

In this process, when the paper feed control gear 21 rotates slightly in the direction of arrow F under the AND condition of the print gear 18 - paper feed control gear 21 and the print gear clutch 17 - paper feed control gear 21, the paper feed shown in Fig. Spur gear portion 10 of feed control gear 21
6 meshes with the flat gear part 62 of the printing gear 18, and the paper feed control gear 21t continues to rotate in the direction of arrow F due to the driving force transmitted from the spur gear part 62. 3 is a diagram showing the positional relationship between the paper feed control gear 21, the rack control lever 26, and the rack 4 before the paper feed control gear 21 rotates in the "" direction and before the slider returns. In this state, the rack control lever 26
The tip of the first claw portion 110 protruding from the paper feed control gear 214C is located in the rotation locus circle of the lever (b) moving portion 103 of the paper feed control gear 214C. The rank 4 rack 111197 is in an upright position 1i1, and the screw tooth 9 of the carry cam 42
It is engaged with 6.

When the paper feed control gear 21 rotates in the F direction as described above, the first claw part 110 of the rack control lever 26 is pushed by the lever rotation claw 103, as shown in FIG. The rack control lever 26 is moved IgI in the direction of arrow G at the groove where the rotating pawl 103 goes out of the rotational trajectory. This rotation moves the position of the engagement pin 114, and
Rack 4 moves in the direction of arrow H! 11/IJ, the rack tooth 91 falls and separates from the screw tooth 96.

When the binding relationship is released, the assembly Hlj of the second printing head 11, the second wheel 12, the slider 14, the ink roller 1@, the carry cam 42, etc. is moved toward the home position by the tensile force of the turn spring 2s. Pull *j [reru. @2 wheel 1
2 is attached to the first wheel 10, the first wheel 10 is in the position shown in FIG.
When the pressing force of the first wheel 12 is p smaller than the tensile force of the return spring 29, the pressing spring 41 is compressed and the first wheel 10 ( Ill typeface 9) and second wheel 12. (Second type wheels 11) are each returned to their home positions, and the slider return operation is completed.

In addition, the control gear 210 of the paper feed 9 shown in FIG. The paper feed p gear 20 is moved slightly in the direction of the arrow. Besides, 1 is now [Me gear s99 and long tooth part 1
16 meshes with the paper feed control gear 21, which subsequently rotates the paper feed control gear 21 in the machine direction. When inserted in between, power is transmitted at Niro (180f rotation)! 11i
1V, and during that time the paper feed gear 2011!90 is rotated. At the same time as the paper feed 9 gear 20 rotates once, the paper feed roller 1s is also rotated by 90f, and the paper 30 is fed by one line phase in cooperation with the paper feed driven roller 'y32.

FIG. The above-mentioned mask portion 80 is integrally provided on the vertical portion 31b of the vertical portion 3Ib provided on the front side of the half, and extends to the front of the hammer 6. Two suppressing pieces 120 are integrally formed to restrict movement of 32 in the axial direction. In addition, the driven p-shira support shaft 19, which is supported by the paper feed p driven roller 32t', has an appropriate elasticity, and the paper feed p driven roller 32t'
Push the -ra 32 against the paper feed 90-ra 19 @ 1 Hold it in a bent state 0 In this way, the slider return and paper feed operations are performed, and the immediate value at the end of symbol digit printing of the next line This rack reconnaissance operation #1111J will be explained with reference to Figure 37 and the first and second figures. When the rack control lever 26 simultaneously moves in the direction of the arrow q and stops as shown in Fig.
The tip of the i42 claw portion 111 is arranged to fall within the rotation locus circle of the first locking end 12 that is connected to the printing gear clutch 1T, as shown in FIG. 37. Then, in the next line, the IiK-printed gear clutch 11 with the symbol digit printed rotates once, but in the middle of the rotation, the second claw part 1 is stopped by the first locking end 12.
11 is pressed, the rack control lever 26 is slightly rotated in the direction of the arrow. The top of the rack*91 stile is placed near the screw*96 of cam 42, but the reed does not engage with it II.
It is in. In this state, when the rack control lever 26 is slightly rotated in the direction of the arrow J, the third position of the rack control lever 26 is
The claw portion 113 enters within the rotation locus of a return claw 1120 provided on the arcuate peripheral wall 35 of the slip wheel 10. As the first wheel 10 rotates one time intermittently, the selection and printing operation of the type portion 33 to be printed on the symbol digit is performed, and just before the first wheel 1001 rotation is completed, the return claw 112 pushes the third claw portion 113.

In response to this, the rack control lever 26 is further rotated in the J direction, and the rack 4 is further rotated in the further direction, so that the rack teeth 91 are engaged with the screw spigots 96 of the cam 42.

In this way, the bale #wJ production on the rack is completed, and then the second type ring 11 is carried over and removed from the mask portion 80.

By sequentially repeating the operations described above from character selection to rack return operation, desired printing is achieved.

Although the #I2 type wheel 11 has a slider return operation, it is also possible to add a blank part for simply blanking and carrying. A type shaft in which the type portion is arranged helically and rotates together with the type shaft and is slidable along the axial direction of the type shaft; drive means for intermittently rotating the type part of each type wheel t so that it stands still for a short time at a position facing the paper; It is equipped with a hammer means for printing by pressure contact, and a displacement dimension of each type part in the direction of the lower digits as the type rotates, and a means for feeding the type wheel in the direction of the upper digits by the means on the digits. 9 The lids are equal to each other so that printing is performed at a predetermined pitch.By adopting such a configuration, the type selection mechanism can be simplified, and Since the clutch means for character selection is not folded, precision in the printing position is high, and high-quality characters are produced. Furthermore, the simplification of the mechanism simplifies assembly work, improving productivity, reducing costs, and reducing weight.

[Brief explanation of the drawing]

The drawings are all for explaining the printer according to the embodiment of the present invention. Fig. 1 is a schematic configuration diagram of the entire printer, Fig. 2 is an exploded perspective view of some parts of the printer, and Fig. 3 is a first wheel. Figure 4 is a perspective view of the second type wheel, showing the state of engagement between the two type wheels and the printing gear, and Figure 5 is a developed view of the outer JII11 side of the sled, explaining the arrangement of the type parts of the second type wheel. , @Figure 6,
7 and 8 are top views, front views, and bottom views of the printing gear drive body, and FIGS. 9 and 11J are top views of the printing gear, as well as a partially sectioned front view and a striped view (11). A), Naka), and (C) are explanatory diagrams showing the engagement state of the printing gear drive body and the printing gear, respectively, and Fig. 12, W413, and Fig. 14 are the left side view, front view, and right side view of the printing gear clutch. Top view, Figure 15 and K i 16 Figure 1; J
Huff 7 (1) An explanatory diagram showing the work of the driver 1IllIllI, Figure 17 is a #i light diagram showing the engagement of the tricarn renoid and the printing gear clutch #1 @ maintenance, and Figure 18 is the connection between the guide rail part and the slider. A larger exploded sectional view of the main parts to see the retention relationship, Figure #1419 is a developed view of the screw part of the carry cam, and Figure @20 is the position of the W41 typeface and the second typewheel in the initial printing standby state. An explanatory diagram showing the IF relationship,
W41 in the state before printing the first numerical digit on Figure 21
Explanatory diagram showing the positional relationship between the type wheel and the second type wheel, No. 226
! 3 is a tying chart to clarify the printing operation of the symbol digit, FIG. 3 is an explanatory diagram showing the engagement relationship between the printing gear clutch and the printing gear drive body, a silver diagram, and FIG. 6 is the paper feed control gear. 27 is a top view and a front view, an explanatory diagram showing the relationship between the Me gear part and the paper feed gear in the paper feed control gear, FIG.
Figure 8 shows the engaging shape 11t of a pair of paper feed control gears and a biasing spring.
- The explanatory diagrams shown in FIGS. 29 and 30 show the related operations of the paper feed control gear, rack control lever, and rack.
Figures 24, 31 and 32 are paper feed control gear 1.
41 is an explanatory diagram showing the relationship between the falling tooth part and the timing cylinder part of the printing gear clutch, FIG.
The first adjustment diagram W2B5 is an explanatory diagram showing the relationship between the wJ2 recessed tooth part of the paper feed control gear and the cylindrical part of the printing gear. FIG. 38 is an explanatory diagram showing the rack return operation. 4...Rack, 5...Type wheel, 6...
... Hammer, 1 ... Paper feed shaft, 9 ...
...First type wheel, 10...First wheel, 11
...I! 2 type wheel, 12...second wheel, 14...slider, 17...print gear clutch, 18...print gear, 19...
...Paper feed roller, 20...Paper feed gear,
21...Paper feed 9 control gear, 22...Motor, 25...Print gear drive body, 26...
... Rack control lever, 27 ... Trigger solenoid, 29 ... Return spring, 30 ...
...Paper, 33...Type section, 42...
Carry cam, 48...Blank part, 51...
...Rotated drive part. Fig. 12 Fig. 13 Fig. 72 Fig. 14 Fig. 151-+ Fig. 16 Fig. 17 Fig. 21 Fig. 24 Fig. 25 Fig. J1! 28 EJ Fig. 34 61 Fig. 35 Fig. 36 2

Claims (1)

[Claims] A plurality of type parts are arranged helically around the outer periphery, a type ring rotates together with a type shaft and is movable along the axial direction of the type shaft, and characters are to be printed in relation to the rotation of the type shaft. a means for raising the number of characters relative to the paper surface of the paper; a drive means for intermittently rotating the type part of each of the type wheels (t) so that the type portion thereof remains at a position facing the paper for a period of time; The size of the deviation of each type part toward the lower digits due to the rotation of the type shaft, and the feed of the type wheel toward the upper digits due to the above-mentioned carry biopsy. A printer that is designed to print at a pitch of Pfr with the same amount of printing.