JPS62246733A - Printer - Google Patents

Abstract

PURPOSE:To shorten an up-and-down moving distance and to enhance a replacement speed, by raising a type wheel to be printed to a position, where the lower part of said type wheel is superposed to the upper part of the other type wheel in a receiving housing, by a rising and falling mechanism. CONSTITUTION:A carrier 3 movable to the axis direction of a platen 2 is provided on a machine stand 1 and a receiving housing 19 having a plurality of the wheels movable to a direction crossing the carrier at a right angle received therein is mounted on said carrier 3 through a receiving stand 45 and one type wheel in said receiving housing 19 is raised to a position, where the lower part of said wheel is superposed to the other type wheel in the housing 19, by a rising and falling mechanism. After the rotary shaft of said wheel is engaged with the wheel by a slide mechanism, the type of the raised wheel is struck by a hammer 175 to perform printing. Because the rising distance of the wheel is short, a replacement speed is enhanced and a printer can be miniaturized as a whole.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention automatically mounts one of a plurality of type wheels each having an annular type portion around its periphery to a carrier at a position suitable for printing as required. to be able to
This invention relates to a printer that can be used to obtain group books with different fonts, numbers, character types, etc.

BACKGROUND OF THE INVENTION Generally, in typewriters, impact type printers using type elements having the same type of type are often used because of their good printing quality and the ability to simultaneously obtain carbon copying. However, impact printers using such types have limitations in printing a variety of mixed characters.

Therefore, in the past, many proposals have been made to make it possible to print mixed characters with respect to impact printers.
U, S, P4,026,403 (preliminary document 1) places the type wheels together in a donut shape and places them on the side of the printer case, and when replacing the type wheels, the carrier is moved to the side of the case and the position is changed. The type wheel is being replaced. Also, U, S, P4゜281.938
In (Preliminary Document 2), when replacing the carrier, the carrier is moved to a certain point t on the turntable, and then the type wheel is replaced.

Furthermore, U, S, P4,357,115 (preceding document 3)
In this system, multiple semicircular type plates are installed on the same axis, and only the necessary type plates are rotated to face the hammer and the type is struck to print.

Furthermore, in Japanese Unexamined Patent Publication No. 58-39464 (preliminary document 4), a magazine accommodates a plurality of type plates having a comb tooth shape with their free ends connected and each comb tooth having a type. , which is installed in the carrier. Inside the carrier, this magazine is moved back and forth to move the desired type plate upward, and the carrier is also moved left and right, and the amount of upward movement of the type plate is adjusted so that the desired type faces the hammer. I am performing impact printing.

Problems to be Solved by the Invention Although each of the prior art techniques described above has been improved in terms of being able to print a wide variety of mixed characters, they have been disadvantageous in terms of total printing speed. For example, the total printing speed when printing mixed characters for -line was insufficient. That is, in Prior Documents 1 and 2, the carrier must be moved to the end position every time the type wheel is replaced, resulting in a lot of wasted movement and the total printing speed becomes slow. Furthermore, the number of printed characters that can be held in the preceding document 3 is greatly reduced, and as a result, the number of times the printing plate needs to be replaced increases, and the total printing speed becomes slower. Further, in the preceding document 4, since a magazine containing a plurality of type plates is mounted on the carrier, it is possible to eliminate unnecessary movement of the carrier when replacing the type plates.

However, since the type plate is roughly comb-shaped,
In order to move the carrier to the desired printing position, it may be necessary to move the carrier not only in the feed direction but also in the opposite direction. If it has to be moved back and forth, it becomes a wasted movement, and the speed of the carrier itself cannot be increased by 1, so the printing speed becomes extremely slow.

Further, it is preferable that the accommodation space for the type plate and type wheel be close to the mounting position thereof, since this will increase the replacement speed and reduce the overall size. In this respect, for example, in the preceding document 4, a housing for the type plate is suspended in the carrier and the type plate is pulled up to the striking position, which is preferable. It fits into the storage space, making the overall space more compact. However, in this example, in order to have all the typefaces face the striking position of the hammer, a space equivalent to approximately one typeface board is required in the horizontal and vertical directions of the hammer, and the total space is approximately four typefaces. Therefore, a large space is required as a whole, and miniaturization is difficult.

That is, the problem is to increase the printing speed and size of mixed characters in impact printers.

Means for Solving the Problem: With respect to the platen provided on the machine base, on the carrier mounted on the machine base so as to move in the direction of its axis, through the cradle, move the carrier in the direction intersecting with the movement of the carrier. A storage case containing a plurality of type wheels is placed so that the type wheels can be moved, and one type wheel among the plurality of type wheels in the storage case is moved upward to a position suitable for printing, so that mixed characters can be printed. The total printing speed when printing is improved, and the lower part of the type wheel that has been moved up to a position suitable for printing is overlapped with the upper part of the other type wheel stored in the storage housing, To improve the exchange speed by shortening the vertical movement distance of a type wheel when exchanging the type wheel, and to miniaturize the entire printer.

A vertical mechanism moves one type wheel out of a plurality of type wheels in a storage case on a pedestal that is movably suspended from a working carrier to a position suitable for printing, that is, the lower part of the type wheel is in the storage case. It is shortened and moved up to a position i where it overlaps with the upper part of the other type wheel accommodated, and at that position, rotation selection printing is performed without any trouble. After printing is completed, it is lowered from that position by the up and down mechanism. and is completely housed in the containment case.

Embodiment To describe this in detail with reference to the embodiment shown in the figure, 1 is a machine base, 2 is a known platen rotatably mounted on the machine base l, and 3
is a carrier, and this carrier is suspended on the machine base via rails 4, support rods 5, etc. so as to be able to slide in the left and right direction in FIG. Reference numeral 6 denotes a pulse motor for driving the carrier, which is installed at a suitable position on the machine I (substantially in the center on the front side in Fig. The carrier 3 is connected to the carrier 3 via a transmission gear group 7, pulleys 8, 9, and 10, a string 11, etc., and the rotation of the pulse motor moves the carrier 3 to the machine base 1 as shown in FIG. It is designed so that it can be moved left and right. 12 (12°...12n)
The type wheel is provided with a type part on one side of the tip of a radially formed free piece, and at a position approximately 180" apart, a pair of type wheels each having a notch 13 and a notch 13' in the tip, respectively. Arm rods 14 and l4' are provided from boss ff115.

A mounting hole 16 is located in the center of the boss portion 15, and a boss portion 1 that is biased to one side (to the left in FIG. 2) from the mounting hole 16
A parking hole 17 is formed at each position 5, and a pair of locking pins 18, 18' are provided at positions parallel to the arm rods 14, 14' of the boss portion 15. are protruding from each. and each type wheel 12 (12°
...12. 19 is a housing housing for the type wheel made of material of a polymer compound, and this housing housing is mainly used for the fourth type. As shown in Figures 12 and 23.

It consists of a casing 20 whose upper and lower sides are open, respectively, and a lid 21 covering the upper part of the casing 20. The casing 20 has a substantially V-shape that also serves as a partition, and is formed at predetermined intervals at predetermined intervals. A number of support plates 23 (23+ . . . 23n) each having a notch 22 for supporting the boss portion 15 of the type wheel at the center thereof are located at a front side plate 25 from a front side plate 24 whose upper part is formed in a substantially semicircular arc shape. It is integrally provided on the left and right side plates 2F3.26nH, and their support plates 23 (23, .
. . 23n), respectively, in the notches 22 of the type wheels 12.
(121--12n) to support the respective boss portions 15, and each bottle 18, l8' to be supported on the support plate 23.
(23, . . . 23 degrees) from above, and each of the type wheels 12 (12, . . . bow 2. The type wheel 1 can be moved upwardly, and the type wheel 1 can be moved upwardly.
The arm rods 14, 14' of 2 (12, --. An integrated long groove 27.27 for retention, one of which (left side in the figure) is opened slightly below the approximate center of the side plate 24 and the front side plate 25 (in front of you in Figure 23). ' are perforated respectively. Further, the long groove 27 is provided on the front side plate 24.
A through hole 28 and a pair of through holes 29 and 29' are formed below the two holes, respectively. One end of each of the free pieces 30 and 31.31', which are formed in a shape of 1.5 mm, is directed toward the front (to the front in the figure) so that they slightly protrude from the through holes 28 and 29.29#, respectively. In addition, the upper end edges of the left and right side plates 26, 26' of the housing 20 are provided with engaging projections 32, 32' having a U-shaped cross section and engaging protrusions 32, 32' on the inside of each. Grooves 33, 33' are provided respectively. Furthermore, a pair of cam surfaces 34, 34' or tz are provided at the ends j (on the front end in FIG. 13) of the respective outer parts forming the engagement grooves 33, 33'. In addition to the notch 35 provided on the other edge of the
Formed by 35'! The upper edges of each of the pair of free ends 36, 36' include
Recesses 37 and 37' for parking are provided respectively. or,
A pair of guide notches 38 and 38' are formed in the front side plate 24 and the front side plate 25 at positions slightly above the positions facing the pair of engagement grooves 33 and 33', respectively. . Furthermore, at the lower part of the right side plate 26, there are a pair of heirs '39 for operation facing outward (rightward in FIG. 23).
．． The lid member 21, which is provided with projecting portions 39', is mainly attached to the front side plate 24 of the housing 20 as shown in FIG.
and a substantially semicircular arc shape sufficient to cover the upper side of the front side plate 25, and the front side and front portion of the base on the left and right sides thereof are formed in a shape that protrudes slightly toward the front side and the front side, respectively,
On the inside of each of those bases, a groove 40.40' of the body is bored, which engages with the protrusion 32.32' of the engagement groove 33.33' of the housing 20. .

At a position slightly above these grooves 40, 40', type wheels 12 (12, . . .
A pair of spring stops 41 and 41' for preventing movement of the spring 2n) are provided in a protruding manner.

Further, on the near side edge slightly above the base, there is a pair of inclined parts 42, 42 formed toward the front from the near side of the base.
A pair of locking notches 43 and 43', which follow the lines 43 and 43', are respectively bored in the front part of the base, and engage with the notches 37 and 37' of the housing 20, respectively, facing outward. A pair of bins 44 and 44' for parking the lid member 21 are provided in a protruding manner. As mentioned above, the type wheel 12 (12
, . . . 12n), turn the lid member 21 from the front as shown in FIG. .32', and the spring stoppers 41 and 41' of the lid member 21 are connected to the notches 38 of the housing 20.
．． Through 38', type wheel armrest 14, l 4'
By engaging and moving the lid material 21 in the notches 13 and 13' of the housing 20, respectively, and engaging the bins 44 and 44' in the recesses 37 and 37 of the housing 20, respectively, and attaching the lid member 21 to the housing 20. , 45 is a force for housing the type wheel 12 (121...12,) in the type wheel housing 19 without any movement. This pedestal is mainly opened at the top and one side (the right side in the same figure) as shown in the seventh figure, and a part of the bottom plate 46 (the left side when viewed from above in the same figure). It is formed into a box shape with a concave portion 4 with a raised bottom, and one end of the side plate 48, 48 (the left end in the figure) is provided on the outside of each. The pair of bosses 49 and 49' communicate with the boss holes 50 and 50', and the holes 51 and 51' are misaligned. On the edge → there is a driving rack 5
2 is engraved, and the other end of the bottom plate 46 (the right end in the figure) has a notch 53 and a tongue piece 54 for engagement.
are provided for each. Also, said both side plates 48.4
Engagement protrusions 55' and 55 that engage with the long grooves 27 and 27' of the housing 20 are protruded on the inside of the housing 20, respectively. There is a hole 56 for engagement. or.

On the outside near one end of the side plate (the front side near the right end in the figure), a protrusion 58 with a mounting hole 57 is provided to protrude outward (forward in the figure). Well, that protrusion 5
8 is made of a material such as a polymer compound, and has a claw portion 59 that engages with the hole 56 of the side plate 48 at one end, a heir 60 for operation at the other end, and a notch 61 on one side. A parking pawl rod 64 is formed and provided with a free retaining portion 63 having an engaging protrusion 62 at one end thereof, a hole 65 bored in the rod, and a mounting hole for the protrusion 58. Due to the elasticity of the pin 66 inserted into the hole 57 and the engagement between the protrusion 62 and the side plate 48, the claw portion 59 always passes through the hole 56 and closes the side plate 4.
It is placed so as to protrude from the inside of the 8.

Incidentally, reference numeral 67 denotes an actuating piece for activating the sensor 8, which will be described in detail later, which is protruded from the outside near one end of the side plate 48 on the other side. The pedestal 45 configured in this manner has a through hole bored in the bottom 68 of the carrier 3 from one side (mainly the assistant side in FIG. 24) where the carrier 3 is open. The tongue portion 54 is engaged with the one side edge 70 of the bottom plate 68 from the lower side of the bottom plate 68, and the boss hole 50.50' of the pedestal 45 and the hole 51.51' of the side plate 48.48' are connected. The shafts are respectively engaged with guide rods 71 fixedly provided on the carrier, and guided by their engagement, are provided on one side plate 73 of the carrier on the bottom 68 of the carrier 3, and the rotation axis thereof is 74 and the rack 52 of the pedestal 45 are related to each other via a gear group 74, and the rotation thereof causes the pedestal 45 to
can be slid on the carrier 3 as described above. Therefore, as described above, the long groove 27 of the housing 20 of the housing housing 19 for the type wheel 12 (12 + . . . bow 2n) is mounted through the opening on the opposite side of the pedestal 45 placed on the carrier 3. .27
' is a protrusion 55' of the pedestal 45.

55 while the free pieces 30 and 31.3 of the housing 20 are engaged with each other.
1' is elastically engaged with the inside of the side plate 48' of the pedestal 45, and inserted until the left side plate 26 is engaged with the stepped inner surface 75 of the bottom plate 46, and then the hole 56 of the parking pawl 64 is inserted. By elastically engaging the inserted claw portion 59 with the parking hole 76 drilled in the housing 20 and mounting the type wheel housing housing 19 on the pedestal 45, the pulse motor 72 can be moved as described above.
By the rotation of the type wheel 12 (12□... bow 2n
) can be moved with respect to the carrier 3 together with its accommodation case 19 and pedestal 45. still,
As shown in FIG. 5, when the heir 60 of the parking pawl 64 is pressed, the pawl 59 is disengaged from the parking hole 76 of the storage case 19 through the elasticity of the protrusion 62, and this storage case 19 is released. You can pull it out to the right (to the front in Figure 5 f) using the carrier's movement space. 77 and 77' are a pair of engaging bodies, and these engaging bodies are mainly formed into a substantially V-shape as shown in FIGS. 24 and 20H.

Attachment holes 78 and 78' are provided at one end of each. and approximately 90" at the other end of each
Engaging protrusions 79 and 79' are formed by bending inward, respectively.

A pin 80.80 is located slightly below the protrusion 79.79' (on the front side in FIG. 23) and engages the cam surfaces 34' and 34 of the housing 20 inwardly. In addition to the protruding pins 80 and 80, the pins 80 and 80 are bent in the opposite direction to the pins 80 and 80, respectively.
Furthermore, protrusions 81 and 81' for adjusting the swinging position are formed by bending this at 906, respectively, and these protrusions 81 and 81' are connected to the elongated holes 82 bored in the side plate 7373 of the carrier 3. ', 82, the engaging body 77.7 is positioned so as to be freely movable.
7' is the hole 78.78' and the shaft 83.83'.
3', 73 is suspended so that it can be moved freely. Reference numerals 84 and 84' denote jump stops formed in a substantially "" shape, and these jump stops are connected to both side plates 73.7 of the carrier 3.
Screws 85 and 85' are provided protrudingly at positions facing the jump stops 41 and 41' of the lid member 21 on the inside of the cover 3', respectively. 86 is the type wheel 12 (121...12.,
), and this rotation shaft 86 is located at the upper side of the approximate center between the both side plates 73 and 73' of the carrier 3 (the front part of the center in the left-right direction in FIG. 12). and the ears 87. of the mounting bracket 87 at a position offset forward from the center in the longitudinal direction of the carrier 3 (position offset to the left from the center in the left-right direction in FIG. 5). ．． It is mounted on the carrier 3 so as to be able to slide in the axial direction (left and right direction in FIG.
8 is integrally fixed, and the type wheel 12 (12, . . .
- In addition to being integrally provided with a stopper 90 having a protrusion 89 on one side (on the right side in Fig. 5) that engages with the stopper hole 17 of the bow (2°), there is also a stopper 90 located approximately in the center of the stopper 90. A pair of engaging collars 91. ．． 912 is provided for each.

One collar 911 and one ear 8 of the mounting bracket 87
7. A compression spring 92 is provided between the two. Then, due to the tension of this compression spring 92, the rotation shaft 8
6 is always energized so as to slide toward one side (toward the right in Figure 5). Therefore, the compression spring 9
The sliding of the rotating shaft 86 due to the bias of
is prevented by abutting against the ear portion 872. Reference numeral 93 is provided in the mouth and carrier 3, and always meshes the transmission gear 88 of the rotation shaft 86 with a gear 95 provided at one end of the rotation shaft 94 (the right end in FIG. 5). In this way, the pulse motor 93
The rotation of the rotation shaft 86 causes the rotation shaft 86 to rotate via the gear 95 and the transmission gear 88. Further, at the other end of the rotation shaft 94 of the pulse motor 93 (the left end in FIG. 5), there is an actuation piece 96 for actuating the sensor 8, which will be described in detail later.
are integrally provided. Reference numeral 97 designates a bearing for the rotating shaft 86, and this bearing 97 is attached to one end of the rotating shaft 86 (right end in FIG. 5) when the rotating shaft 86 is slid to the right in FIG. A mounting plate 9 is provided between the side plates 73 and 73' of the carrier 3 so that the carrier 3 can be rotatably supported. Reference numeral 99 is a pulse motor that serves both for sliding the rotating shaft 86 and for vertically moving the type wheel 12 (12,...bow 211).
is provided at the front of the left end of the side plate 73' of the carrier 3 in FIG. 1
01 is fixed. 102 is a rotating body, and cam surfaces 103 and 104, a gear 105, and engagement teeth 106 are integrally formed on the outer periphery of the rotating body 102 in the axial direction from the - side to the other side, respectively, in that order. outside of the
A grooved cam 108 is provided on one end surface 107 of the same? It is set up.

The rotating body 102 has its mounting hole 109 directed toward the front of the side plate 73' in FIG. The gear 105 and the gear 101 of the rotation axis lOO are meshed with each other via a transmission gear group 112 mounted on the side plate 73'. The rotating body 102 is rotated by the operation of the pulse motor 99.

Reference numeral 113 designates a first crank, and this first crank is mainly connected to the shaft 1 on the mounting bracket 87 as shown in FIG.
A roller 115 that engages with the cam surface 104 of the rotating body 102 is mounted on one end of the roller 115 so that it can freely rotate. In addition to that, a notch 117 for engagement is bored at the other end. The splinter hook 1 is installed on the other end of the first crank 113 and the mounting bracket 87.
Due to the tension of a spring 119 tensioned between the roller 115 and the cam surface 10 of the rotating body 102,
The first crank 113 is biased so as to always engage with the first crank 113. Reference numeral 120 denotes a second crank, which is placed on the mounting bracket 87 and connected to the pulse motor 9.
9, the rotating body 102 and the first crank 113
By swinging the second crank 120 through the sliding mechanism, the rotating shaft 86 can be slid in the axial direction thereof. Reference numeral 124 denotes a gear body, and this gear body includes a gear 125 with a flange extending from one side to the other in the axial direction, a third toothless steel weight 127 partially having a toothless portion 126, and the above-mentioned toothless gear 127. 112 corresponding to the missing tooth portion 126
A second partially toothed gear 129 having only one tooth 05 is provided in that order, and the first partially toothed gear 127 of this gear body 124 is connected to the first tooth 05 of the rotary body 102 and also to the second partially toothed gear 129. The tooth portion 126 of the gear 129 or the rotating body 102 ml 06
The both side plates 73.
The pair of flanged gears 125 and 130 are fixed to a shaft 131 which is rotatable between 73' and has a flanged gear 130 fixed to one end, which forms a pair with the flanged gear 125. A pair of gears 13 are mounted so as to be freely rotatable on the lower side of each of the side plates 73 and 73'.
A pair of timing belts 134.
A pair of timing belts 134 .
135 move up and down by the same amount at the same time. 13
6 and 137 are a pair of engaging bodies, and these engaging bodies mainly have protrusions 138 and 139 at the ends of the people, and a pair of guide notches 140, as shown in the second section.
140'.

In addition to 141 and 141', a locking pin 142 and 143 is provided protruding near the other end on the negative side (the front end on the right side in the figure). 144
and 145 are a pair of bearings fixed to the timing belt 134 and 135, respectively, and each of these bearings is provided with grooves 146 and 147 on which the engaging bodies 136 and 137 can slide, respectively. The engaging bodies 136 and 137 are respectively engaged with the respective grooves 146 and 147, and the respective pins 142 and 143 are connected to the guide grooves 146' and 147' of the respective grooves 146 and 147.
The engaging bodies 136 and 137 are engaged and guided so that they can freely slide while protruding from the respective supporting bodies 144 and 145.
are supported on respective supports 144 and 145. A and A' are a pair of grooves for guiding the engaging bodies 136 and 137, and these grooves are connected to the side plates 73 of the carrier 3.
', 73, respectively. 148 and 149 are a pair of cam plate bodies each having a cross-section approximately in the shape of
0.151 are drilled in each side, and a pair of elongated holes 152.152' and 153.153' are drilled in the other side for mounting. Pin 15 of
Projections 156 and 157 with 4.155 are protruded from each other, and these cam plates 148 and 149 have flanged shafts inserted into their respective elongated holes 152 and 152' and 153 and 153'. 158.158', 159.15
9' are fixed to both side plates 73' and 73 of the carrier 3 from the outside, and the cam plate bodies 148, 149 are connected to the respective elongated holes 152, 152, 153, 153' and the flanged shaft 158.
, 158', l 59° 159', said side plates 73'.

Both side plates 73' can be slid on the outside of 73.
, 73. Reference numeral 160 denotes a crank, and as mainly shown in Section 20 and FIG. A pin 162 that engages with the grooved cam 108 of the rotating body 102 is provided protruding from the other end. The crank 160 is held in a state in which the notch 161 is engaged with the pin 154 of the cam plate 148, and the pin 162 is engaged with the groove 108 of the rotating body 102, respectively. It is fixed to one end of a rotation shaft 163 that is rotatably mounted between the two. Further, the other end of the rotation shaft 163 has a notch 164 at one end that engages with the pin 155 of the cam plate body 149.
The other end of the rod 165 is fixed, and the swing of the crank 160 through the engagement of the grooved cam 108 with the pin 162 of the crank 160 due to the rotation of the rotating body 102 and the rotation axis By swinging the rod 165 through the shaft 163, the pair of cam plates 148 and 149 can be made to swing. Furthermore, the pair of cam plate bodies 148,1
Each grooved cam 150.151 of 49 has a support 144.14 of the pair of timing bells)-134, 135.
Pin 142゜1 of the engaging bodies 136, 137 suspended on 5
43 are engaged with each other, and these pins 14
2, 143 and the grooved cams 150, 151, the engaging bodies 136, 137 slide, respectively.

Reference numeral 166 denotes a swinging pawl rod formed in a substantially "" shape, and one side of the swinging pawl rod 166 is provided with the cam surface 103 of the rotating body 102.
In addition to protruding a protrusion 167 that engages with the
1169 are formed respectively.

The swinging pawl rod 166 is mounted on the mounting bracket 87 of the carrier 3 with its protrusion 67 engaged with the cam surface 103 of the rotating body 102 by the biasing force of the weight 169.
It is mounted on an ear part 170 erected by a shaft screw 171 so as to be able to swing. Reference numeral 172 designates a rotating circular body for parking the pair of timing belts 134 and 135, with a notch 173 on a part of its circumferential surface, and a protrusion 1 adjacent to the notch.
74 is recessed, and this rotating circular body 172 is placed on the shaft 131 so that it can rotate together with the gear body 124 while being positioned inside the side plate 73' of the carrier 3. is screwed 173 to the cam surface 103 and the swinging claw rod 1 when the rotating body 102 rotates.
By the swinging of the swinging pawl rod 166 through engagement with the protrusion 167 of 66, the pawl 168 engages with the notch 173 of the rotating circular body 172, and the rotating circular body 172 and the shaft 131 are moved. The gear body 124 is temporarily parked, and these parking mechanisms temporarily stop the movement of the pair of timing belts 134, 135 at that position. In this case, the teeth of the gear 105 of the rotating body 102 are positioned in the toothless portion 126 of the first toothless gear 127, and even though the gear 105 rotates, it idles between the teeth of the toothless portion 126. The rotation is not transmitted to the gear 124 and the shaft 131.Then, the rotation of the rotating body 102 is reversed, and the cam 103 engages with the protrusion 167 of the swinging claw rod 166, thereby causing the swinging claw. Return movement of rod 166 and one rotation rest 172
At the same time as the temporary locking of the gear body 124 via the shaft 131 is released, the teeth 106 of the rotary body 102
After the teeth of the tooth portion 128 of the second toothless gear 129 of No. 4 are engaged with each other and the gear body 124 is rotated for a period corresponding to the gap between the teeth of the toothless portion 126, the teeth of the gear 105 are again engaged with the teeth of the tooth portion 128 of the second toothless gear 129. gear 12
It meshes between the 7 teeth.

The rotation of the rotating body 102 is transmitted to the gear body 124 via the first partially toothed gear 127, so that the plated steel car body 124 and the shaft 131 are rotated, and the pair of timing belts 134 and 135 are made to move back. It has become. Reference numeral 175 denotes a hammer for printing, and this hammer is suspended on the shaft 177 of the carrier 3 via a mounting bracket 176, and is operated by a solenoid 179 provided on the carrier 3 via a mounting bracket 17B.

One end 175' of the hammer 175 swings toward the platen 2, and the type wheel 12 (12+...1211
) and a ribbon 180 to print on a printing paper 181-h provided on the platen 2. Then,
As shown in the twelfth diagram, the type wheel located at a position suitable for printing and the type wheel in the storage housing are stacked vertically in order to improve the replacement speed and downsize the printer. There is. 4 and 5 mainly show, as mentioned above, a large number of type wheels 12 (12, . . . 1211 ) and the pedestal 45 are both arranged so that they can be moved by the rotation of the pulse motor 72.

From this state, in order to place a desired type wheel among the type wheels 12 (12+...12°) with different fonts, numbers, character types, etc. in a position suitable for printing, the command is sent to the control circuit. Then, according to the control command of the control circuit, in the first stroke, the rotation of the pulse motor 72 moves the pedestal 45 together with the accommodation case 19 in which the type wheels (12,...12.1) are housed. After the actuating piece 67 is moved to the so-called home position where it engages the sensor A provided on the carrier 3 (at that time, the cover member 21
Mainly, as shown in FIGS. 8 to 10, the cam surfaces 34' and 34 and the engaging body 77 provided on the carrier 3
The engaging body 7 by engagement with the pin 80 and 80' of ゜77'
With the swing of 7.77', the protrusion 79.79' moves into the lid member 21.
As a result, the elastic engagement between the pins 44, 44' of the lid 21 and the recesses 37, 37' of the housing 20 is released. Sequential storage case 1
Each notch 13, 13' of the type wheel 12 (121...bow 2,) moves while opening the upper part of the type wheel 9.
moves while slightly engaging with the protrusions 138, 139 of the engaging bodies 136, 137 provided on the timing belt 134, 135, and then engages with the jump stops 84, 84' or the pulse motor is moved by the control command of the control circuit. With the return of 72,
The housing housing 19 is moved back together with the pedestal 45 to position the desired type wheel in the housing housing 19 at a position where its notches 13, 13' are slightly engaged with the protrusions 138, 139 of the engaging bodies 136, 137. The apprenticeship area is indicative of the situation). Next, as a second step according to the control command of the control circuit, the rotating body 102 is rotated by the rotation of the pulse motor 99 via the gear lot and the transmission gear group 112.
and the shaft 13 via the first partially toothed gear 127 of the gear body 124.
1, the flanged gears 125 and 130 are rotated, and the pair of timing belts 134 and 135 are moved in the direction of the arrow in the disciple work area together with the support bodies 144 and 145 and the engaging bodies 136 and 137. , engaging body 136,
137 pins 142, 143 and cam plate body 148, 149
By engaging with the grooved cams 150 and 151, the engaging body 136
, 137, the protrusions 138, 139 are the notches 1 of the type wheel.
3. 13' is fully engaged and the type wheel is raised to a position where its mounting hole 16 is between the pivot shaft 86 and the bearing 97 and faces the pivot shaft 86 and the bearing 97. At the same time, teeth ll (105
Due to the toothless portion 126 of the second toothless tooth 1127, the transmission to the shaft 131 via the toothless gear 127 is cut off, and the rotation is caused between the cam surface 103 of the rotating body 102 and the protrusion 167 of the swinging pawl rod 166. The claw 16 of the swinging claw rod 166 is engaged with the
8 engages with the notch 173 of the rotary circular body 172, and the shaft 131
According to the rotation of the gear body 124 via
By the rocking of the second crank 120 due to the engagement between the cam surface 104 of the rotating body 102 and the roller 115 of the first crank 113, the rotating shaft 86 is slid together with the stopper 90 toward the shaft bearing 97, The rotary shaft 86 and the protrusion 89 of the stopper 90 are engaged with the mounting hole 16 and the parking hole 17 of the type wheel, respectively, so that the type wheel is fixed to the rotary shaft 86. Incidentally, the rotating body 102 is.

Its initial position is detected by sensor C shown in FIG. This sensor C detects the actuating piece of the shaft 131 to detect the initial position. Third? 'r', the grooved cam 108 of the rotating body 102 and the bottle 162 of the crank 160 immediately after that.
The swinging of the crank 160 due to engagement with the rotating shaft 163
A pair of cam plates 148.
149 in the direction of the arrow near the disciple through the engagement of the elongated holes 152, 152' and the shafts 15B, 158', and the groove cams 150, 151 of the pair of cam plate bodies 148, 149 and the engaging body 136, The movement of the engaging bodies 136 and 137 by engagement with the pins 142 and 143 of 137 causes the respective protrusions 13 to move.
8139 is disengaged from the notch 13.13' of the type wheel, and the type wheel is attached to the rotating shaft 86 in a rotatable state suitable for printing operation (Deshi Work Area to Figure 20 shows the period between this period). In this state, the actuating piece 96 is located at the position of the sensor B, and the shaft 94 of the pulse motor 93 and the type wheel are located at the home position in the rotating direction. ing. Therefore, in this state, by driving the pulse motor 93 and operating the solenoid 179 according to the control command from the control circuit, the type wheel can perform desired printing. When printing by the type wheel is completed and a control command is given from the control circuit to indicate that the type wheel should be replaced with another type wheel, the pulse motor 93 is driven to rotate the shaft 94 of the pulse motor 93 and the type wheel in the rotating direction. After positioning the rotating body 102 at the home position, the rotating body 102 is rotated in the opposite direction as described above by the pulse motor 99.
The crank 160, rotating shaft 163 and rod 16 rotate in the opposite direction.
5 in the directions opposite to those described above, the pair of cam plates 148 and 149 are moved in the directions opposite to those described above, and the projections 138 and 139 of the engaging bodies 136 and 137 are moved into the notches 13 of the type wheel. 13', the engaging teeth 106 of the rotating body 102 are engaged with the teeth 128 of the second partially toothed gear 129 of the gear body 124, and the gear body 124 is rotated in the opposite direction to that described above. The pair of timing belts 134 and 135 are moved by the claw 168 of the swinging claw rod 166 through the rotating inner body 172 and the shaft 131, so that the temporary parking state of the type wheel is released, and at the same time the rotating body is rotated once. The first partially toothed gear 1 of the gear body 124 is attached to the gear 105 of 102.
27 are engaged and rotated to connect a pair of timing belts 134.
135 returns the type wheel to its accommodation housing 19 via the engagement bodies 136 and 137, and then the pair of timing belts 134 and 135 return to the engagement body 136.
．． 137 is removed from the cutout 13.13' of the type wheel, and the type wheel is completely accommodated in the receiving housing 19. Thereafter, each part is operated in the same manner as described above, and the type wheel to be replaced is mounted on the pivot shaft 86 in a state suitable for printing operation.

Effects of the Invention As described above, according to the present invention, the cradle is placed on a carrier mounted on the machine base so as to move in the axial direction of the platen provided on the machine base. A plurality of type wheels each having type portions to be moved are housed in such a manner that they can be moved downwardly by a control signal from a control circuit, so that a desired one of the plurality of type wheels can be moved downwardly by a control signal from a control circuit. Accordingly, by operating the up-down mechanism and the sliding mechanism, the carrier can be automatically attached to the rotating shaft suitable for the printing operation, and this can be automatically connected to the other type wheels in the storage housing. Can be exchanged and by this.

Not only can the total printing speed be extremely efficiently improved when printing mixed characters with different fonts, numbers, and character types, but also, as mentioned above, the vertical mechanism allows the type wheel to be When the type wheel is moved upward to a position suitable for printing, the lower part of the type wheel is in the overlapping position with the upper part of the other type wheel housed in the housing. Since the vertical movement distance by the vertical mechanism is short, the speed of replacing the type wheel can be improved, and the printer as a whole can be made smaller, which has extremely large effects.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which the first figure is a plan view of a part shown with a cutaway, the second figure is a rear view of a part, and the third figure is a partial cross-sectional view. Figure 4 is a side view of a part shown in cross section, Figure 5 is a plan view of a part shown with a part cut away, and Figure 6 is a side view of a part shown with a part cut away. The side view, Fig. 7 is a partial perspective view with a part cut away, Figs. Fig. 13 is a front sectional view of a part, Fig. 13 is a front view of a part shown in a different operating state from Fig. 13, and Deshi Shikoku is an enlarged plan view of a part; Figure 13 is an enlarged side view of a part shown in a different operating state from Figure 4, Deshi 6 is an enlarged side sectional view of a part, and Figures 1-Moda and Deshi are each shown in different operating states. The 19th figure is an enlarged side sectional view of a part, the 19th figure is an enlarged plan view of the part shown in cross section, and the 2nd child figure (also the 2nd figure is an enlarged side view of the part shown in an operating state different from Figure 13). Figure 10 is an enlarged front view of a part shown in a different operating state from Figure 13, Section 20 is an enlarged perspective view of a part, Figure 23 is an enlarged perspective view of the thick part, Figure 20 The construction area is partially enlarged 1...machine, 2...platen, 3...
Carrier, 4...Rail, 5...Support rod, 6...Pulse motor, 7...Conduction gear group, 8.9, lO...Pulley, 11...String string,! 2 (121...12n)...Type wheel, 13.13...Notch, 14.14'...Arm rod, 15...Boss part, 16...Mounting hole, 17...Parking hole 18.18・・Pin, 19・・Type wheel accommodation case,
20... Housing, 21... Lid material, 22... Notch, 23 (2
3□ ...3n)...Support plate, 24.. Front side plate of housing 20, 25. Front side plate of housing 20, 26.. Housing 2
Left side plate of 0, 26'...Right side plate of housing 20, 27°27
'...Long groove, 28.29.29'...Through hole. 30.31.31'・multi-separated piece, 32.32′・protrusion, 33.33′・engaging groove, 34.34′・cam surface,
35.35'...notch, 36.36'...separation end, 3
7.37'...notch, 38°38'...notch, 39.3
9'... legitimate child, 40°40'... groove, 41.41'.
・Jump stop, 42, 42'...Slope part, 43.43'...
Notch, 44.44'...pin, 45...cradle, 46...
Bottom plate of pedestal, 47...Concave part, 48.48'...Both sides plates, 49.49'...Boss, 50.50'...Boss hole, 5
1.51'...Hole, 52.'...U-Nkyu53...Notch,
54...tongue part, 55.55'...protrusion, 56...hole,
57...Mounting hole, 58...Protrusion piece, 59...Claw part, 60...
・Legitimate child. 61...Notch, 62...Protrusion, 63...Engagement part, 64
... Parking lever, 65 ... Hole, 66 ... Pin, A ... Sensor, 67 ... Operating piece 68 ... Bottom plate of carrier 3, 69
...Through hole, 70...Side edge of through hole 69, 71...Guide hole. 72...Pulse motor, 73.73'...Both side plates of carrier 3, 74...Rotating shaft of pulse motor 72, 75...
Stepped inner surface of bottom plate 46 of pedestal 45, 76...parking hole of housing 20, 77.77'...engaging body, 78,78'...hole,
79.79'...Protrusion, 80.80'...Pin, 81°81'...Protrusion, 82.82'...Elongated hole, 83, 83'
...Axis, 84. J34'...Jump stop, 85°85'...
Screw, 86...Rotation shaft, 87...Mounting bracket, 87. ．． 8
7.・・Ear part, 88・・Conduction gear, 89・・Protrusion, 9o
... Parking child, 91,. 91. ... Pair of collars, 92... Compression spring, 93... Pulse motor, 94... Rotating shaft of pulse motor 93, 95... Gear B... Sensor, 9
6Φ・Operating piece, 97・・Shaft bearing, 98・・Mounting plate, 99
... Pulse motor, 100... Rotating shaft 101 of pulse motor 99 -- Gear, 102 -- Rotating body, 103104 --
-Cam surface, 105--Gear, 106...Engagement teeth, 1
07... One end of rotating body 103, 108... Groove cam, 1
09...Mounting hole, 110...Seat, 111...Shaft, 112
・ψ conduction gear group, 113-・First crank, l14...
Shaft, 115... Roller, 116... Shaft, 117... Notch, 118... Spring hook, 119... Spring, 120... Second crank, 121... Pin, 122...
- The other end of the second crank 120, 123...shaft. 124... Gear body, 125... Gear with flange. 126... Missing tooth portion, 127... First missing tooth gear. 12B...Tooth section, 129...Second partially toothed gear, 130...
Gear with flange, 131...shaft, 132.133...pair of gears, 134.135...pair of timing belt,
136.137...Pair of engaging bodies, 138,139...
Projection, 140', 140, 141, 141'φ・
Notch, 142.143... Pin, 144.145... Support, 146, 147... Groove, 146', 147'.
・Guide groove, 148.1491 Pair of cam plates, 15
0,151...Groove cam, 152.152'...Pair of long holes, 153.153'...Pair of long holes, 154.155
...Pin, 156.157...Protrusion, 158.158
', 159, 159'... Shaft with flange, 160... Crank, 161... Notch. 162...Pin, 163...Rotation axis, 164...Notch,
165...rod, 166...swinging claw lever, 167...protrusion,
168...claw, 169...weight, 170...11 parts, 1
71...Shaft screw, 172...Rotating circle, 173...Notch, 173'...Screw stop, 174...Protrusion, 175...
Hammer, 175'...One end of hammer 175, 17
6...Mounting bracket, 177...Shaft, 178...Mounting bracket,
179... Solenoid, 180... Ribbon, 181...
Printing paper, C...Sensor - Figure 5, Figure ζ6 Procedure Amendment (Method) May 1988 ltI Commissioner of the Patent Office Black 1) Akio Tono 1, Indication of the case Patent application 1988-2678472, Invention Name: Printer 3, Relationship to the person making the amendment Patent applicant: Location: 1-11-2-4 Kyobashi, Chuo-ku, Tokyo Date of amendment order: March 31, 1985 (Date of dispatch: April 1988) 28th) 5. Column 6. Brief explanation of drawings of the specification subject to amendment 6. Contents of amendment

Claims (1)

[Claims] A platen provided on a machine base is moved in a direction perpendicular to the movement of the carrier via a pedestal on a carrier suspended so as to move in the axial direction of the platen. After positioning one of the plurality of type wheels in the housing of the type wheel with a plurality of types suspended so that it can be placed at a position suitable for printing, the type wheel provided on the carrier is The type wheel is moved upward to a position suitable for printing by the operation of the up-and-down mechanism, and the rotating shaft of the type wheel, which is also provided in the carrier, is engaged with the type wheel by the sliding mechanism, thereby printing the type in the type wheel. In a printer that selectively prints via a hammer, the upper movement position of the type wheel adapted to printing by the vertical mechanism is set such that the lower part of the type wheel overlaps the upper part of another type wheel housed in the storage housing. A printer characterized in that it is in a position where