JPS61206679A - Paper guide mechanism for printer - Google Patents

Abstract

PURPOSE:To enable accurate paper setting and enable the title mechanism to be applied even to a printer having a large printing head, by directing guide plates for a printing paper toward the same paper bail roller. CONSTITUTION:In a printer in which a printing paper 69. 70 can be supplied both from the upper side and from the lower side of a main body, the guide plates 25, 31 for the printing paper 69, 70 are directed toward the same paper bail roller 41. When supplying the paper 70 from the upper side, the paper 70 is guided by the guide plate 25 to a part between a platen 24 and the roller 41, and is set in position. On the other hand, when supplying the paper 69 from the lower side, the paper 69 is guided by the guide plates 31, 37 to a part between the plate 24 and the roller 41, and is set in position. Accordingly, for example, automatic paper supply and manual-insertion paper supply can be conducted completely separately from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention can be applied to printing devices such as digital printers, wire dot printers, thermal printers, thermal transfer links, etc., which can supply printing paper from both above and below the main body. Specifically, the present invention relates to a paper guide mechanism that guides printing paper to a platen in such a printing device.

■Rice holder Conventionally, in most printing devices, printing paper is supplied from above the main body, guided by a guide plate, and set on a platen. However, with printers that only feed paper from above the main unit, 1) You have to manually install the automatic paper feeder, home tractor, letter guide, etc. to separate cut paper from continuous paper, or manual feed from automatic paper feed. 2) If a large and heavy automatic paper feeder is attached to the main body, it is unstable and looks bad, and it is troublesome to remove it. There were problems such as:

Therefore, among conventional printing apparatuses, there is a wire driver 1-printer in which printing paper can be supplied both from above and below the main body, as shown in FIG.

Number (1) in the middle of Fig. 15 is the printer main body, and (2) is the automatic paper feeder, as shown in the figure.
2) The printer body (1) is placed on l. The printer body (1) is equipped with a platen (3).
3), a guide plate (4) is installed along the outer periphery with a slight gap therebetween. Then, the paper fed from one side of the printer body (1) in the direction of arrow (a) in the figure is guided to the platen (3). Reference numerals (5) and (5) in the figure are paper press rollers that are pressed against the platen (3) to press the paper and feed the paper.

On the other hand, the front end of a guide plate (6) made of Mylar paper or the like is pressed against the front side (left side in the figure) of the platen (3).

The base end of the guide plate (6) is attached to the upper end of the guide plate (7). The guide plate (7) stands up from below with a gap slightly larger than the paper thickness between it and the guide plate (8). And those pair of guide plates (7)・(
At step 8), the paper fed from the automatic paper feeder W (2) in the direction of arrow (b) in the figure is guided to the platen (3).

When the printing paper from the automatic paper feeder (2) is sent to the platen (3) to the platen 1, the rotary plate of the paper feed roller in the automatic paper feeder (2) is controlled and the printing paper is sent out. The paper was placed in an appropriate position relative to the platen (3) by changing the amount.

However, the amount of paper fed from the automatic paper feeder (2) to the printing position (P) is large, and the amount of paper deflection during the process varies depending on the thickness and size of the paper, and furthermore, the feeding accuracy of the paper feed roller is affected. Because of the difference, it was very difficult to set the paper in the correct position. and the tilt of the paper (
The disadvantage was that it was not possible to correct the skew.

Also, since the upper ends of the pair of guide plates (7) and (8) are placed in front of the paper presser roller (5) (on the left side in Figure 1), there is no space below the front side of the platen (3). It was not suitable for a large printing device such as a printer that prints on the printing spatula 1. It may be possible to move the guide plates (7) and (8) backward to secure a larger space below the front side of the platen (3), but if you do that, the paper presser roller (5)
) is also rearward, and the print position (P) and paper presser roller (5
) There were 4 defects in which the gap became larger and the margin at the bottom of the paper increased accordingly.

■-The object of the present invention is therefore to provide a printing device that can supply printing paper from both one side and the bottom of the main body.
All of the supplied printing paper is sent out from the feed roller as close as possible to the printing position (P), allowing for accurate paper setting.

To provide a paper guide mechanism that can increase the space below the front side of a platen and can be applied to printing devices with large print heads such as digital printers.

Therefore, the paper guide mechanism according to the present invention is suitable for a printing device that can supply printing papers (69), (70), and (73) from both above and below the main body (1o).
The supplied printing paper (69), (7o), (73)
Guide plates (25), (31), (37), (
74), (75), (79), and (84) are arranged facing the same paper pressing roller (41), respectively.

Then, insert the printing paper (70) and (73) into the main body of the device (10
) When feeding from above, guide plates (25) and (7
4), (79), (84) to guide the platen (24)
and the paper presser roller (41), and wrap it around the platen (24) through the gap, and set it so that the paper can be fed. On the other hand, when feeding the printing paper (69) from below the main body (10), separate guide plates (31), (37),
(75) and (84) to guide the platen (24) in the same way.
and the paper presser roller (old), and wrap it around the platen (24) through the gap between the rollers and the paper presser roller (old) to allow the paper to be fed.

Hereinafter, the present invention will be described in detail according to embodiments shown in the drawings.

FIG. 2 shows a digital serial printer equipped with a paper guide mechanism according to the present invention. In FIG. 1, cylinder number (10) indicates the printer main body, and (11) indicates an automatic paper feeding device. In this embodiment, as shown in FIG. 3, the automatic paper feeder (11) is equipped with two cassette insertion slots on the front, and paper cassettes (12) and (13) can be inserted and removed into these slots, respectively. Installing. The automatic paper feeder (1) also has a printing paper feed port (14) on the top surface.

Support frames (+5) and (16) are protruded in two directions from both ends of the delivery port (14), and the delivery roller shaft (1
7)・(18) is given to Kake. Automatic paper feeder like this (
There are also four parts (19) on each corner of the two sides of 11).
)... is renumbered. However, those four parts (19)
. . , and place the printer main body (10) on the automatic paper feeder (II)-1=, as shown in FIG. 2. At this time, the printer body (]
Support frames (15) and (16) and feed roller shafts (17) and (18) that protrude from the top surface of the automatic paper feeder (11) enter into the inside of the paper feeder (11).

Then, the printing paper in the cassettes h (1, 2) and (13) mentioned above are sent out from the delivery port (14) by a delivery roller or the like, and can be automatically supplied to the printer main body (10).

The printer main body (10) is provided with side plates (21) and (22) on the left and right as shown in FIG.
(The N-shaped stay plates (23) are sandwiched between them, and the platen (24) is removably hung between the side plates (21) and (22). It can be rotated by a space motor (not shown).

Now, as can be seen from FIG. 1, a guide plate (25) is disposed around the outer periphery of the platen (24) from the rear to the bottom with a slight gap between the platen (24) and the platen (24).

The guide plate (25) is curved into a cylindrical shape as shown in FIG. 5, and has a mounting bent piece (26) and a locking projection piece (27) on the left and right sides, respectively. Then, fold the bent pieces on both sides (26
) and (26) to the left and right side plates (21) and (22), respectively, and the protrusions (27) and (27) for the locks 11 on both sides to the locking plates (28) and (2B), respectively. ” Second stage section (29)・
(29) and fix the whole thing. Section 11-S 1-
As can be seen from Figure 6, the brim (28) is connected to the upper and lower sections (29).
)・(30). After fitting the protrusion (28a) into the side plate hole, screws (33) are inserted into the through hole (32) and fixed to the corresponding inner surfaces of the left and right side plates (21) and (22), respectively.

By the way, the upper end of the guide plate (31) rests on the lower portions (30) and (30)l of the locking slots 1 to flange (28) and (28).

As shown in FIG. 7, the guide plate (31) is a flat plate with one side curved into a cylindrical shape, and a bent protrusion (34) for a knob and a bent piece (35) for attachment are formed on the left and right sides, respectively. do.

Then, attach the bent pieces (35) and (35) on both sides to the side plate (21).
)・(22) rotatably attached, bending protrusion (34)
・Tension springs (36) and (36) are installed at the base of (34), respectively.
) at one end. However, the tension spring (36
)/(36) to the side plates (21)/(22).
The guide plate (31) is arranged so as to stand up from below toward one side, and both ends of the leading edge curved toward the front are connected to the locking stoppers (28) and (28) as described above.
) is pressed against the lower part (30) and (30) J:. Then, the printing paper supplied from the delivery port (14) of the automatic paper feeder (11) described above is guided to the platen (24).

Opposed to this guide plate (31) is another guide plate (37) that guides the printing paper supplied from the automatic paper feeder (11). As shown in Fig. 8, the guide plate (37) has a flat plate whose upper part is curved in a wave shape, and a plurality of roller windows (38) are arranged in a straight line on the curved surface. Each has bent pieces (39) and (40) for attachment. As can be seen from Figure 1, these bent pieces (39) and (40)
are fixed to the side plates (21) and (22), respectively, and face the guide plate (31) with a slightly wide gap in the lower part. The platen (24) is arranged so that it rises in one direction from below, and the gap between the platen (24) and the guide plate (31) gradually narrows at the lower curved surface.
and along its outer periphery.

By the way, as can be seen from FIGS. 1 and 4, the paper press rollers (41) are passed through the platen (24) through the roller windows (38) of the guide plate (37).
... to press against it. Paper press roller (41)...
・Refer to the roller shaft (42), and remove the roller shaft (42).
2) is passed between the ends of each pair of rotating levers (43) and (44). Those rotating levers (43) and (44)
is inserted into the window hole (45) of the stay plate (23) and rotatably supported by a support shaft (46) passing through the center of each other.

The support shaft (46) is supported at both ends by the trigger pieces (47) and (48) of each stay plate (23), and is supported by the E-ring (49).
) to stop extraction. And each rotating lever (43) (
44) Attach one end of each tension spring (50) to the other end. The other end of the tension spring (50) is hooked onto the stay plate (23). However,
Normally, the lever (43) rotates around the support shaft (46).
- (44) is given a clockwise rotation habit in the figure, and the paper pressing roller (41) is pressed against the platen (24).

A cam shirt h (5) is arranged below the stay plate (23), and both ends are connected to the side plate (21) via bearings (52) and (52).
)・(22) rotatably supported, E-ring (53)・
(53) stops the extraction. This camshaft (51) is cut out to have a semicircular cross section to form a plurality of cam parts (54). As shown in Fig. 1, the flat parts of the cam parts (54) are opposed to the side surfaces of the respective rotary levers (43) and (44) with a slight gap (p) between them. do. This camshaft (5
One end of an arm (56) is attached to the flat part (55) formed at one end of 1) so as to be able to transmit rotation. This arm (
A caulking pin (57) is erected on the other end of 56). Then, this caulking pin (57) is fitted into the elongated hole (59) at the tip of the operating lever (58) and fixed with an E-ring (60). The operating lever (58) is bent into a crank shape, and a bottle (61) placed on the outside of the right side plate (22) is fitted into the corner hole of the operating lever (58), and similarly fixed with an E ring (62). The operating lever (58) can be rotated about the pin (61) by holding the knob (63) at the upper end.

Now, as shown by the two-dot chain line in FIG. ) to enable rotation. Then, rotate the type wheel (64) to obtain the desired type (65).
) and position it to the print position. Then, the selected type (65) is struck with a printing hammer (66) to print on the paper set on the platen (24).

As can be seen from Figures 1 and 4, the stay plate (
23), a paper sensor (68) is attached via a bracket (67).

The illustrated digital serial printer is configured in one or more ways. Next, a case will be described in which printing paper is supplied to this digital serial printer.

First, when automatically feeding print paper using the automatic paper feeder (II), the print paper (69) sent out from the feed opening (14) is moved by a pair of guide plates (31) and (37). invite. Then, the platen (24) and paper presser roller (41) are guided from below the printer main body (10), and placed between them to smoothly control the feeding of the leading edge of the paper (69). do. Even after the feeding of the leading edge of the paper (69) is stopped, the feeding roller shafts (17) and (
18) continues to rotate, and the printing paper (69) * is further fed out between the pair of guide plates (31) and (37).
69) to give it some degree of deflection. After confirming the presence of paper (69) with the paper sensor (68),
The platen (24) is rotated in response to a command from the host, and the paper (69) is wound between the paper pressing roller (41) and fed by a certain amount, and the winding is set on the platen (24).

After that, printing is performed on the paper (69).

Next, when manually setting cut sheets from above the printer main body (10), hold the knob (63) and tilt the operating lever (58) toward you (counterclockwise in FIG. 1). Then, the arm (56) rotates clockwise in FIG. 1 about the camshaft (51).

Then, the cam part (54)... pushes the side surface of the corresponding rotating lever (43), (44), and the rotating lever (
43) and (44) are rotated counterclockwise in FIG. 1 about the support shaft (46) against the tension springs (50).

As can be seen from Fig. 9, the paper presser roller (41)
... is separated from the platen (24) to form a slight gap (q) therebetween. Therefore, as shown in Figure 9, the printing paper (
70) manually. Then, the paper (70) is guided by the guide plate (25), passes between the platen (24) and the paper presser roller (old), and then passes between the platen (24) and the paper presser roller (old).
). Therefore, when the control lever (58) is raised again using the knob (63) and returned to its original position, the arm (56) is moved to the camshaft (58).
1) and the rotation levers (43) and (44) are disengaged from the rotation levers (43) and (44), and the rotation levers (43) and (44) are rotated by the tension springs (50 )・
It rotates clockwise in the diagram with the force of... However,
The force of the tension spring (50) causes the paper press roller (
41) ... can hold the printing paper (70) and transfer the paper (70) & platen (24) to the cellar 1.

Next, when manually feeding the cut paper from one side of the printer main body (10) to the automatic celler 1, use the operation lever (58).
) and place the paper presser roller (41) on the platen (24).
While pressing ..., press the printer body (10) in the same way.
) Manually feed the printing paper (70) from one side. Then, the paper (70) is guided by the guide plate (25) and guided between the platen (24) and the paper press roller (41).

Thereafter, the platen (24) is rotated by pressing a feed button (not shown) or by turning the platen knob (71) shown in FIG. 4 by hand. And the platen (24)
The printing paper (70) is rolled up between the paper pressing roller (41) and the platen (24).

Finally, when printing continuous paper using a home tractor, move the printer body (10) as shown in Figure 10.
You can pick up the home tractor (72) above. Then, the continuous paper (73) from the platform 1 hector (72) is wound and set on the platen (24) in the same manner as in the above-mentioned manual setting of the paper in the cup 1 or automatic cellar 1. However, in normal cases, the control lever (
58) and remove the paper presser roller (4) from the platen (24).
1), the home tractor (72) is driven to rotate the platen (24) and feed the paper.

By the way, in the illustrated embodiment, the exterior cover (not shown) is opened, the platen (24) is removed as necessary, and the bending protrusion (3) is removed.
4), the guide plate (31) can be opened as shown by the dashed line in FIG. At this time, when the guide plate (31) is opened to a certain angle or more, the force of the tension springs (36) and (36) causes it to rotate in the training direction in the figure, and the bending protrusion (34) )・(34
) to the outer case shown by the two-dot chain line in the figure. Therefore, when a paper jam occurs, the printing paper can be taken out very easily by opening the guide plate (31).

The paper guide mechanism according to the present invention is formed, for example, in a two-way configuration. Of course, Figure 1 or
The present invention is not limited to the above-described embodiment shown in FIG. 0, and appropriate changes can be made. For example, the guide plate (2
5) Instead of (37), use a guide plate (
74) and (75) can also be used.

As can be seen from FIG. 11, the guide plate (75) is made at almost the same height as the opposing guide plate (31), and similarly, these guide plates (31) and (75)
) to guide the printing paper (69). On the other hand, as shown in FIG. 12, the guide plate (74) has a paper passing hole (76) in the center and a plurality of roller windows (77) parallel to the long window (76). Lay them out and open them. And those pair of guide plates (31) and (75
) so that the paper (69) guided by the paper passing hole (76) passes through the paper passage hole (76) and is guided between the platen (24) and the paper presser roller (41).

Instead of this guide plate (74), a guide plate (79) having a paper passage hole (78) as shown in FIG. 13, for example, may be used. Here, the paper passing hole (78) is the 12th
Paper passing hole (76) and roller window (77) shown in the figure...
・are connected to form one hole. In addition, at both ends of the guide plates (74) and (79), bent pieces (80) and (81) and (8
2) and (83) are formed, and the left and right side plates (21) and (2
2) can be installed. Although the upper ends of the guide plate (75) are not shown, they can be attached to the left and right side plates (21) and (22) by appropriate means.

Now, in the example shown in FIGS. 11 to 13, the guide plate (25) and the guide plate (37) shown in FIGS.
). However, instead of the guide plate (37), a guide plate (84) as shown in FIG. 14 is used, which is a combination of the guide plate (25) and the guide plate (31).
A guide piece (85) may be fixed to the guide plate (84) to guide the printing paper (69), (70), and (73).

Then, as shown by the dashed line in the figure, the guide plate (84
) can be opened and closed in its entirety.

Effects Therefore, according to the paper guide mechanism according to the present invention,
The following effects occur.

1) Since it is possible to feed printing paper from both the bottom and top of the device, automatic paper feeding and manual paper feeding can be completely separated. There is an advantage that there is no need to attach or detach the automatic paper feeder when registering paper.

2) Since there is no need to mount a heavy and bulky automatic paper feeder on the main body of the apparatus, there is no risk of instability or deterioration of the appearance.

On the other hand, if the main body of the apparatus is placed on the automatic paper feeder 2, there is an advantage that there is no need to attach or detach the automatic paper feeder.

3) Once the paper from the automatic paper feeder is pressed between the platen and paper holding roller and stopped, the leading edge of the paper is stopped by one step, and then the paper continues to be fed from the automatic paper feeder. , the paper is deflected by a certain amount between a pair of guide plates, and the stiffness of the paper is used to firmly feed it between the platen and the paper presser roller, making it easier to feed the paper from the automatic paper feeder. Even if there is a misalignment, the misalignment can be absorbed near the printing position.Also, even if the paper is fed skewed, it will be pressed between the platen and the paper holding roller, and the skew will be corrected. Since the correction is made, an accurate feed amount corresponding to the rotation amount of the platen can be obtained from now on, and the leading edge of the paper can be neatly aligned (leading edge registration 1 - ration set 1 ~). Therefore, there is no misalignment in the paper set, the print quality can be made good, and paper feed jams can be prevented from occurring.

4) Since the lower front side of the platen is wider, it can also be applied to printing devices with a large printing spatula, such as digital serial printers, as in the embodiment.

5) Since the guide plate for guiding the downwardly fed paper can be made openable and closable, it is possible to easily take out the paper when a paper feed jam occurs.

[Brief explanation of the drawing]

1 to 10 show an embodiment of the present invention, FIG. 1 is a side view showing a paper guide mechanism in the digital serial printer shown in FIG. 2, and FIG. 2 is a schematic external configuration diagram of the digital serial printer. , FIG. 3 is a perspective view of the automatic paper feeder used in the digital serial printer shown in FIG. 2, FIG. 4 is an exploded perspective view of FIG. 1 with some parts omitted, and FIG. FIG. 6 is a perspective view of the locking stop 1-flange thereof, FIGS. 7 and 8 are perspective views of the guide plate for guiding the downwardly fed paper, and FIG. 9 is a perspective view of the guide plate 1. A side view of the paper guide mechanism shown in the figure when the operating lever is rotated and the paper presser roller is pulled away from the platen.
FIG. 10 is a side view of the appearance of the market when the home 1-actor is attached to the digital serial printer shown in FIG. 2. FIG. 11 is a mechanism explanatory diagram showing an example in which the guide plate in the embodiment shown in FIGS. 1 to 10 is modified. FIG. 12 is a perspective view of a guide plate used in the mechanism shown in FIG. 11, and FIG. 13 is a perspective view showing a modification thereof. FIG. 14 is a mechanism explanatory diagram showing an example in which the guide plate in the embodiment shown in FIGS. 1 to 10 is further modified. FIG. 15 is a schematic configuration diagram showing a conventional paper guide mechanism in a printing device that supplies paper from both above and below the main body. (1,0)...Device body (24)...Platen (25), (31), (37), (74), (75),
(79)・(84)...Guide plate (41)...Paper presser roller 2O-

Claims (1)

[Claims] 1. In a printing device in which printing paper can be supplied from both above and below the main body, guide plates for guiding the supplied printing paper are arranged to face the same paper pressing roller, respectively. Paper guide mechanism of printing device. 2. A paper passing hole is made in the guide plate that guides the printing paper fed from above, and a guide plate is arranged to guide the printing paper fed from below towards the paper passing hole, and the printing paper fed from below is guided through the guide plate. A paper guide mechanism for a printing device according to claim 1, wherein the paper is guided through a paper hole toward a paper presser roller.