JPH07314855A - Printer - Google Patents

Abstract

PURPOSE:To remove quickly and easily jam paper while miniaturization and reduction of a cost are attempted by providing a switching lever or the like capable of holding the positioning at any one of at least a first, a second, and a third switching positions to a printer. CONSTITUTION:A switching lever 51 is engaged with a guide member 9 by friction, and the switching lever 51 is held by positioning at respective switched positions (P1, P2, P3) by frictional force acting between both. Three recess parts 58 are formed on an under surface of the switching lever 51 at a mutual corresponding distance of respective switched positions (P1, P2, P3). Further, a projection part 59 capable of engaging the switching lever 51 by being slightly engaged with the recess part 58 is provided onto a base surface 4. When the switching lever 51 is operated by transferring by slightly strong force, an engaged relation between the recess part 58 and the projection part 59 is released to be transferrable. Further, when the switching lever 51 is located at the first switched position P1, a first operating part brings a pinch roller 32A (31B) in pressure contact with a feed roller 31A (3B).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer capable of printing both continuous paper and discontinuous paper.

[0002]

2. Description of the Related Art Recently, a printer capable of selectively conveying continuous paper (fan hold paper) and non-continuous paper (meaning paper other than continuous paper such as single-cut paper and passbook) to a printing unit for printing. Is widely used.

A conventional configuration of such a printer is shown in FIGS. 4 and 5. In these figures, 1 is a main body case. The main body case 1 includes a printing unit 21, a tractor 25, feed rollers (31A, 31B), pinch rollers (32A,
32B) and the like are built in. Further, the main body case 1 is provided with a cover 5 that can be opened and closed so that repairs and replacements of built-in parts and removal of jammed paper can be performed easily.

Specifically, as shown in FIG. 4, the printing unit 21 includes a platen 22 and a carrier 24 provided along the platen 22 so as to be capable of reciprocating in a direction orthogonal to the plane of the drawing.
And a print head 23 provided on the carrier 24 so as to face the platen 22.

The tractor 25 is provided on the upstream side of the printing unit 21 in the continuous paper transport direction, and is operated by the power supplied from a drive motor (not shown) to transport the continuous paper to the printing unit 21. Has been done.

Further, the feed roller 31A and the pinch roller 32A are constructed so as to be able to hold and convey the cut sheet inserted from the right side in FIG. Similarly, the feed roller 31B
The pinch roller 32B presses the passbook or the like inserted from the left side in FIG.
It is configured such that it can be nipped and conveyed toward 1.

Both ends of the pinch roller 32A are movably supported in vertical holes 42A formed in the main body case 1, and the feed roller 3 is supported by a pressing spring 43A.
It is pressed against 1A. On the other hand, pinch roller 32B
Both ends thereof are supported by a vertical hole 42B formed in the cover 5 so as to be vertically movable, and are pressed against the feed roller 31B by a pressing spring 43B.

The pinch roller 32A (32B) is fed by the pressure contact releasing mechanism 41P to the feed roller 31A (31B).
It is configured to be separated from. Pressure release mechanism 41P
Is an operation cam 44A capable of slidingly contacting the roller shaft 33 of the pinch roller 32A (32B) and pushing up the roller shaft 33.
(44B) and the actuating cam 44A (44B) to the connecting member 4
6 includes a switching lever 45P that is rotatable via 6 and rotates the switching lever 45P counterclockwise in the figure by a predetermined angle to separate the pinch roller 32A from the feed roller 31A and rotate in the clockwise direction in the figure. The pinch roller 32B is configured to be separated from the feed roller 31B by rotating the pinch roller 32B by a predetermined angle.

Here, in the case of printing continuous paper, the pinch roller 3 is operated with the switching lever 45P operated to bring the pinch roller 32B and the feed roller 31B into pressure contact with each other.
2A is separated from the feed roller 31A. This allows
The continuous paper can be smoothly conveyed to the printing unit 21 by the tractor 25 without being obstructed by both rollers (31A, 32A). At this time, the continuous paper is also fed and urged by both rollers (31B, 32B) on the left side in FIG.
It is printed without sagging and is discharged to the table 3 side.

When the cut sheet is conveyed to the printing unit 21, the pinch roller 32A (32B) is used as the feed roller 3.
It is pressed against 1A (31B). As a result, the single-cut sheet can be smoothly nipped and conveyed to the printing unit 21 by the rollers (31A and 32A, 31B and 32B), printed, and discharged to the table 3 side.

Similarly, when printing a passbook, the pinch roller 32A (32B) is replaced with the feed roller 31A (31B).
Press against. As a result, the passbook can be conveyed to the printing unit 21 for printing while smoothly sliding on the table 3 by the rollers (31B and 32B, 31A and 32A), and discharged again to the table 3 side.

As described above, when the pinch roller (32B) is provided on the cover 5 side, the feed roller (31
Cover 5 so that the pressure contact with B) is maintained.
Is provided with a cover lock mechanism 11P for locking in a closed state.

As shown in FIG. 4, the cover lock mechanism 11P includes an engaging shaft 17, a lock lever 18, and a severing portion 19, and the severing portion 19 rotates the lock lever 18 counterclockwise in the drawing. The cover 5 can be locked in a closed state by a dynamic operation. That is, the cutting portion 19
Is operated to rotate the lock lever 18 from the outside of the main body case 1, and the hook portion 18 of the lever 18 is rotated.
The cover 5 can be locked in the closed state by engaging a with the engaging shaft 17 provided inside the tip of the cover 5.

[0014]

By the way, in the printer described above, for example, when there is a trouble in the conveyance of the cut sheet sandwiched by the feed roller 31A and the pinch roller 32A and a sheet jam occurs, the switching lever 45P is used. After the pinch roller 32A is operated away from the feed roller 31A, the pinching portion 19 is operated to release the engagement between the lock lever 18 and the engagement shaft 17 to release the locked state of the cover 5. However, the cover 5 must be opened, which is troublesome.

Further, the present printers are required to be further downsized and reduced in cost in order to expand the fields of use.

In view of the above circumstances, it is an object of the present invention to provide a printer capable of quickly and easily removing jammed paper while achieving downsizing and cost reduction.

[0017]

A printer according to the present invention includes a tractor for conveying continuous paper to a printing section, a feed roller for press-contacting / separating, and a feeding roller for sandwiching and conveying non-continuous paper to the printing section. A printer provided with a pinch roller and a cover lock mechanism capable of locking a cover provided on the main body case to be openable and closable in a closed state. A switching lever that can be selectively positioned and held in any of the switching positions, a first operating portion that presses the pinch roller against the feed roller when the switching lever is positioned in the first switching position, and the switching lever. A second operating portion that separates the pinch roller from the feed roller when the switch lever is positioned at the second switching position;
And a third operation portion for forcibly releasing the locked state of the cover by the cover lock mechanism when the cover is positioned at the switching position.

[0018]

In the present invention having the above structure, the switching lever is the first
When the pinch roller is positioned at the switching position (second switching position), the pinch roller is pressed against (separated from) the feed roller by the first operating portion (second operating portion). This makes it possible to smoothly convey the non-continuous paper (continuous paper) to the printing unit.

Further, for example, when a paper jam occurs in the state where the discontinuous paper is sandwiched by the feed roller and the pinch roller, the switching lever is moved and positioned at the third switching position. As a result, the third operating portion releases the locked state of the cover.

In this way, when the locked state of the cover is released, the cover is opened, and in that state, the switching lever is moved and positioned to the second switching position. Then, the pinch roller is separated from the feed roller. As a result, the jammed paper can be easily removed from between the rollers.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, this printer has a basic configuration similar to that of the conventional example (FIGS. 4 and 5), but the switching lever 51 and the first, second and third actuating portions (52). , 54, 5
6) is provided, and the cover 5 can be unlocked not only by switching the sheets but also by moving the switching lever 51. The same or common components as those of the conventional example (FIGS. 4 and 5) are designated by the same reference numerals, and the description thereof will be simplified or omitted.

First, the switching lever 51 is horizontally moved while being guided by the guide member 9 on the base surface 4 of the main body case 1, and the first, second and third switching positions (P1, P2, P).
3) It is provided so that it can be selectively positioned and held.

The switching lever 51 and the guide member 9 are frictionally engaged with each other, and the switching lever 51 is positioned and held at each switching position (P1, P2, P3) by the frictional force acting between the two (51, 9). It is configured. In particular, in this embodiment, three recesses 58 are formed on the lower surface of the switching lever 51, and are spaced apart from each other by a corresponding distance between the switching positions (P1, P2, P3). Further, the base surface 4 is provided with a convex portion 59 that can be lightly engaged with each of the concave portions 58 to lock the switching bar 51. When the switching lever 51 is moved with a little strong force, the engagement between the concave portion 58 and the convex portion 59 is released, and the switching lever 51 can be moved.

Further, the first actuating portion is operated by the pinch roller 3 when the switching lever 51 is positioned at the first switching position P1.
2A (31B) is a means for pressing the feed roller 31A (32B). Further, the second actuating portion is provided with the switching lever 51.
Is a means for separating the pinch roller 32A from the feed roller 31A in a state where the pinch roller 31B and the feed roller 32B are in pressure contact with each other when they are positioned at the second switching position P2. Further, in the third operating portion, the switching lever 51 is the third
It is means for forcibly releasing the locked state of the cover 5 by the cover lock mechanism 11 when the cover 5 is positioned at the switching position P3.

In this embodiment, the cover lock mechanism 11
Is a locking member 1 provided on the frame 2 of the main body case 1.
It is formed from 2. The locking member 12 is composed of a locking groove 13 having an open top and an inclined guide surface 14. The locking groove 13 is formed so as to be fitted with the roller shaft 33 of the pinch roller 32B supported by the vertical hole 42B of the cover 5 and to prevent rotation of the cover 5 about the support shaft 6 as a center. The inclined guide surface 14 is formed so as to be slidably in contact with the roller shaft 33 of the pinch roller 32B and to be guided in the locking groove 13 when the cover 5 is closed from the open state.

Here, the first, second, and third actuating portions are formed integrally with the switching lever 51.
It is composed of a third actuating cam portion (52, 54, 56).

As shown in FIG. 3A, the height h1 of the first actuating cam portion 52 from the base surface 4 is the pinch roller 32A.
(32B) is formed so that it can be pressed against the feed roller 31A (31B) by the urging force of the pressing spring 43A (43B).

The second actuating cam portion 54 has a base surface 4
Is formed so that the pinch roller 32A can be separated from the feed roller 31A against the biasing force of the pressing spring 43A.

The third actuating cam portion 56 includes the pinch roller 32.
A predetermined angle θ with respect to the base surface 4 so that the roller shaft 33 of B can be pulled out from the locking groove 13 of the locking member 12.
It is formed only with an inclination. In FIG. 1, 7 is a biasing spring that biases the cover 5 in the opening direction.

Next, the operation of this embodiment will be described. When printing a single-cut sheet, as shown in FIG. 3A, the switching lever 51 is positioned at the first switching position P1 and the pinch roller 32A (32B) is moved to the feed roller 31A.
It is pressed against (31B). As a result, the single-cut sheets inserted from the right side in the drawing are set to the rollers (31A and 32A, 31B).
And 32B), the sheet can be smoothly conveyed to the printing unit 21, printed, and discharged to the table 3 side.

Here, if a paper jam occurs during the transportation of a single-cut sheet, the switching lever 51 is moved and positioned at the third switching position P3, as shown in FIG. 3 (C). Then, the roller shaft 33 of the pinch roller 32B is pushed up by the third actuating cam portion 56 to be pulled out from the locking groove 13 of the locking member 12, and the locked state of the cover 5 is forcibly released. Further, the pinch roller 32A is pushed up by the second actuating cam portion 54 and separated from the feed roller 31A. When the lock is released, the cover 5 is opened in a half-open state by the urging force of the urging spring.

Thus, when the cover 5 is half-opened and the user fully opens the cover 5, the upper part of the feed roller 31B is widely opened, so that the pinch roller 32 is opened.
The jammed paper can be easily removed in combination with the fact that A is separated from the feed roller 31A.

When printing continuous paper, as shown in FIG.
As shown in (B), the switching lever 51 is moved to the second switching position P2.
To the pinch roller 32B and the feed roller 31.
The pinch roller 32A is separated from the feed roller 31A while being pressed against B. As a result, the continuous paper can be smoothly conveyed to the printing unit 21 by the tractor 25 for printing without being obstructed by the rollers (31A, 32A) and discharged to the table 3 side. At this time, since the continuous paper is also fed and urged by both rollers (31B, 32B) on the left side in the drawing, high quality printing is performed without sagging.

When the passbook is conveyed to the printing unit 21, the switching lever 51 is positioned at the first switching position P1 and the pinch roller 32A (32B) is moved to the feed roller 31A.
It is pressed against (31B). As a result, the passbook can be conveyed to the printing unit 21 and printed while smoothly sliding on the table 3 by the rollers (31B and 32B, 31A and 32A).

However, according to this embodiment, the switching lever 51 capable of selectively positioning and holding at any of the first, second and third switching positions (P1, P2, P3) and the switching lever 51. Is positioned at the first switching position P1, the pinch roller 32A (32B) is moved to the feed roller 31A (3
1B), and the pinch roller 32A and the feed roller 31A in a state where the pinch roller 32B and the feed roller 31B are brought into pressure contact when the switching lever 51 is positioned at the second switching position P2. And the second actuating cam portion 54 for forcibly releasing the locked state of the cover 5 by the cover lock mechanism 11 when the switching lever 51 is positioned at the third switching position P3.
6 is provided, the number of parts of the cover lock mechanism 11 can be reduced, the structure can be simplified, and the locking of the cover 5 can be released quickly and easily. As a result, the jammed paper can be removed quickly and easily while achieving downsizing and cost reduction.

The first, second and third actuating cam portions (5
2, 54, 56) are formed integrally with the switching lever 51, so that further downsizing and cost reduction can be achieved.

Further, the switching lever 51 is set to the third switching position P3.
Since the cover 5 is released from the lock and the pinch roller 32A (32B) is separated from the feed roller 31A (31B) when positioned, the jammed paper can be removed more quickly and easily. it can.

[0038]

According to the present invention, a switching lever capable of selectively positioning and holding any one of the first, second and third switching positions and a pinch when the switching lever is positioned at the first switching position. A first operating portion that presses the roller against the feed roller, a second operating portion that separates the pinch roller from the feed roller when the switching lever is positioned at the second switching position, and a switching lever is positioned at the third switching position. In this case, since the cover lock mechanism is provided with a third operation portion for forcibly releasing the locked state of the cover, it is possible to reduce the number of parts of the cover lock mechanism and simplify the structure. Can be released quickly and easily. As a result, the jammed paper can be removed quickly and easily while achieving downsizing and cost reduction.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view for explaining an embodiment of the present invention.

FIG. 2 is a perspective view for explaining the positional relationship among the switching lever, the pinch roller, and the cover.

FIG. 3 is also a diagram for explaining the paper switching operation and the cover locking release operation of the switching lever.

FIG. 4 is a partially cutaway side view for explaining the conventional configuration of the printer.

FIG. 5 is likewise an external perspective view.

[Explanation of reference numerals] 1 main body case 5 cover 11 cover locking mechanism 21 printing unit 25 tractor 51 switching lever 52 first operation cam unit (first operation unit) 54 second operation cam unit (second operation unit) 56 third operation Cam part (3rd actuation part)

Claims (1)

[Claims] 1. A tractor for transporting continuous paper to a printing unit, and a feed roller and a pinch roller capable of sandwiching and transporting discontinuous paper to the printing unit in a state of being in pressure contact / separation and in pressure contact are provided in a main body case. In a printer equipped with a cover lock mechanism capable of locking a cover provided on the main body case to be openable and closable in a closed state, at least one of the first, second and third switching positions is selectively positioned and held. A possible switching lever, a first actuating portion that presses the pinch roller against the feed roller when the switching lever is positioned at the first switching position, and when the switching lever is positioned at the second switching position A second actuating portion that separates the pinch roller from the feed roller, and a front part of the cover lock mechanism when the switching lever is positioned at the third switching position. Printer, characterized in that provided a third operating unit for forcibly releasing the locked state of the cover, a.