JPH0710332A - Paper sheet transfer device - Google Patents

Abstract

PURPOSE:To prevent the clogging in a paper sheet transfer passage. CONSTITUTION:A paper sheet transferring device is equipped with sheet guides 11 and 13 arranged oppositely at a paper sheet transfer passage formation position for forming a paper sheet transfer passage 8 in separation by a prescribed distance, driving rotary body 13 arranged along the paper sheet transfer passage 8, press attaching member 10 which is opposed to the driving rotary body 13, keeping the paper transfer passage 8 interposed, and a press contact mechanism 17 which press-attaches the driving rotary body 13 and the press contact member 10 in free contact and separation by the urging force of a spring member 14. Further, a movable supporting mechanism which supports one sheet guide 13 in a shiftable manner in the direction separating from the other sheet guide 11 and performs positioning-holding at the paper sheet transfer passage formation position by the urging force of a spring member 16 is provided, and when a lump of paper sheet is advanced into the paper sheet transfer passage 8, it is spread.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying device used in printers and the like.

[0002]

2. Description of the Related Art Conventionally, there is a printer in which roll paper wound in a roll shape is held in a paper holding portion and printing is performed on continuous paper drawn from the roll paper. This printer is provided with a sheet guide system including a seed guide and a driving roller that face each other to form a sheet conveying path, and a pinch roller that is pressed against the driving roller while sandwiching the sheet conveying path. In this paper carrying system, the continuous paper drawn from the roll paper held in the paper holding section is carried. Then, the continuous paper conveyed by the paper conveyance system is
Printing is performed at a predetermined position up to the sheet discharge port.

By the way, roll paper is formed by winding it around a tubular core, but in recent years, roll paper formed without a core has been used. This roll paper without core can roll longer paper with the same outer diameter than roll paper with core.

[0004]

In this coreless roll paper, the beginning of winding, which corresponds to the core, is a solid mass. For this reason, when the roll paper without the core is used, the portion that is the lump at the beginning of winding may be supplied from the paper holding unit to the paper transport system without being unraveled and may be jammed in the paper transport system. Therefore, near the entrance of the paper transport system,
Some models have a separator mechanism to loosen lumps, but they are not absolutely reliable.

[0005]

SOLUTION: To solve the problem, a sheet guide which is spaced apart by a predetermined distance to form a sheet conveying path and which is arranged to face a sheet conveying path forming position, and a drive rotating body which is arranged along the sheet conveying path. A pressure contact member that faces the drive rotating body across the sheet conveying path; and a pressure contact mechanism that presses the drive rotating body and the pressure contact member so that they can be contacted and separated by the biasing force of a spring member,
At least one of the sheet guides facing each other is movably supported in a direction away from the other sheet guide, and is formed by a movable support mechanism that positions and holds the sheet conveyance path formation position by the biasing force of a spring member.

[0006]

[Function] When a sheet of paper enters between the sheet guides facing each other, the sheet guide supported by the movable support mechanism is
Due to the pressing force received from the lump, the urging force of the spring member moves in a direction away from the facing sheet guide. For this reason, the paper conveyance path becomes wide, and the lump of paper can be easily passed. Then, when the block of paper passes,
The moved sheet guide returns to the original position by the urging force of the spring member. Further, when a lump of paper enters between the drive rotating body and the pressure contact member, which are press-contacted by the press-contact mechanism, the drive rotary body resists the biasing force of the spring member due to the pressing force received from the press-contacting member. The pressing member is separated. For this reason,
A lump of paper can be easily passed through. Then, when the lump of paper passes, the drive rotating body and the pressure contact member are pressed against each other again by the urging force of the spring member.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The present embodiment is applied to a receipt journal printer built in an electronic cash register or the like. This receipt journal printer prints on a receipt paper 1 and a journal paper 2 which are arranged in parallel on the left and right, and a receipt cutter 3 is provided on the receipt printing side as shown in FIG. In this receipt journal printer, as shown in FIGS. 2 and 3, a pair of paper guides 5 and 6 arranged at a position communicating with the paper insertion opening 4 are fixedly attached to a main frame 7, and these The paper transport path 8 formed by the facing paper guides 5 and 6 communicates with the printing unit 9.

The printing section 9 has a line thermal head 10 and a platen roller 11. The line thermal head 10 includes the main frame 7
It is attached to a bracket 12 which is rotatably supported by a head, and is pressed against a platen roller 11 located on a movable sheet guide 13 as a sheet guide by a head pressing spring 14. The platen roller 11 not only functions as a platen for the line thermal head 10, but is also driven by gears 15a, 15b, 15c to drive a rotating body that conveys the paper in the paper conveyance path 8 and the movable paper guide 13. It functions as a sheet guide that extends to form the sheet conveying path 8 so as to face each other. Further, the line thermal head 10 functions not only as a print head but also as a pressure contact member that presses a sheet against the platen roller 11 that functions as a driving rotating body.

The movable paper guide 13 is positioned at a position continuous with the paper guide 5, and its paper guide surface is curved along the platen roller 11 located above. This movable paper guide 13 is shown in FIG.
As shown in FIG. 2, the bosses 13a protruding outward are provided on both side surfaces, and the bosses are attached to the elongated holes 7a formed in the main frame 7. The long hole 7a is a long hole which is long in the vertical direction, and the movable paper guide 13 is movable along the long hole 7a in a direction away from the platen roller 11. The movable paper guide 13 is normally pressed by a paper guide urging spring 16 and positioned close to the platen roller 11. A movable support mechanism is formed here.

The head pressing spring 14 is attached to a push plate 17 which is rotatably and axially supported by the main frame 7. The push plate 17 is positioned at a pressing position where it is locked by a locking lever 18 provided outside the main frame 7 and presses the line thermal head 10. A press contact mechanism is formed here.

Next, in this receipt journal printer, the paper discharge path 19 extends from the printing section 9 to the receipt cutter 3 (receipt printing side) and the unillustrated journal winding section (journal printing side). 8 is extended. And this paper ejection guide 1
A jam detection plate 20 is provided so as to face the paper jam 9, and detects a paper jam. This jam detection plate 20
Is rotatably supported by a bearing portion 20a protruding above the rear portion thereof being connected to a bearing portion formed on the bracket 12 by a rotation shaft 21. Then, the slidable detection terminal 23 of the micro switch 22 presses the jam detection plate 20 from above by the urging force of a spring (not shown) to position the tip of the jam detection plate 20 on the paper ejection guide 19. There is. The micro switch 22 is attached to the front end of the bracket 12.

In this receipt journal printer having such a structure, the paper feed path 8 is fed from the paper insertion opening 4
When the receipt paper 1 and the journal paper 2 which are continuous papers are inserted into the paper, these papers 1 and 2 are conveyed in the paper conveyance path 8 by the rotation of the platen roller 11, and when they pass below the line thermal head 10, they are conveyed in a predetermined manner. Image printing is performed, the receipt paper 1 is cut into a predetermined length by the receipt cutter 3, and the journal paper 2 is wound up on a journal winding unit (not shown).

Here, when the solidified mass at the beginning of winding, which corresponds to the core of the coreless roll paper, is supplied from the paper insertion port 4 without being loosened, as shown in FIG. 1, the pressing force of the mass is applied. The movable paper guide 13 is moved by the paper guide urging spring 1.
It moves downward against the biasing force of 6. Therefore, the lump is conveyed next without being jammed in the paper conveyance path 8. When the lump passes, the movable paper guide 13 returns to its original position by the urging force of the paper guide urging spring 16. Next, when the lump is conveyed to the printing unit 9, the line thermal head 10 rotates slightly upward against the pressing force of the head pressing spring 14 due to the pressing force of the lump. For this reason, the lumps are discharged without being clogged between the line thermal head 10 which is a pressure contact member and the platen roller 11 which is a drive rotator. When the sheet of paper passes, the line thermal head 10 returns to its original position by the urging force of the head pressing spring 14.

When the lump is discharged from the printing unit 9,
The jam detection plate 20 is rotated upward by the mass, and the detection terminal 23 of the microswitch 22 is pushed in. When the detection terminal 23 of the micro switch 22 is pushed in,
This receipt journal printer detects a jam, stops the conveyance of the paper, and notifies that effect.

As described above, in the receipt journal printer according to the present embodiment, the movable paper guide 13 and the line thermal head 10 move to widen the paper transport path 8, so that a lump of paper may be jammed in the paper transport path 8. Since it is prevented, even if a lump of paper is supplied from the paper insertion port 4, the lump of paper can be discharged without being clogged. For this reason, it is not necessary to specially provide a transport path opening mechanism or the like for opening the paper transport path 8 to remove the paper jammed in the paper transport path 8, and the size and cost can be reduced.

Further, since the movable paper guide 13 and the line thermal head 10 which have moved to pass the lump of paper are automatically returned to their original positions, there is no need to perform an operation for returning them to a predetermined position.

In this embodiment, the line thermal head 10 can be moved up to replace the paper or clean the head. However, if there is no reason for this, a mechanism for increasing the head is not always necessary. In addition, in this embodiment, the platen roller 11 also serves as a driving rotating body,
Although the line thermal head 10 also serves as the pressure contact member, a drive roller (driving rotor) or a pinch roller (pressure contact member) may be separately provided.

[0018]

According to the present invention, when a block of paper enters between the sheet guides facing each other, the sheet guide supported by the movable support mechanism resists the biasing force of the spring member by the pressing force received from the block. Then, since the sheet conveying path is widened by moving in a direction away from the sheet guides facing each other, a lump of sheets can be easily passed through, and further, the drive rotating body is press-contacted by the press-contact mechanism so as to be freely contactable and separable. When a lump of paper enters between the pressure contact member and the pressure contact member, the pressing force received from the lump separates the drive rotating body and the pressure contact member from each other against the biasing force of the spring member. In addition, it is possible to prevent jamming of the paper, and it is not necessary to provide a transport path opening mechanism for removing the jammed paper in the paper transport path. A lump of When the sheet is moved, the moved sheet guide returns to its original position by the urging force of the spring member, and the separated drive rotor and the pressure contact member are pressed again by the urging force of the spring member. After this, it is possible to eliminate a complicated operation for returning each part to a predetermined position.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view of a journal printing side showing a state in which a movable paper guide of a receipt journal printer according to an embodiment of the present invention is moved.

FIG. 2 is an external perspective view showing a receipt journal printer.

FIG. 3 is a vertical sectional side view on a receipt printing side.

FIG. 4 is an exploded perspective view illustrating a method of attaching a movable paper guide.

[Explanation of symbols]

 8 Paper Transport Paths 7a, 13a, 16 Movable Support Mechanism 10 Pressure Contact Member 11 Drive Rotating Body, Sheet Guide 13 Sheet Guide 14 Spring Member 14, 17, 18 Pressure Contact Mechanism 16 Spring Member

Claims (1)

[Claims] 1. A sheet guide which is arranged to face a sheet transport path forming position which forms a sheet transport path at a predetermined distance from each other,
A drive rotating body arranged along the sheet conveying path, a pressure contact member that faces the drive rotating body across the sheet conveying path, and the drive rotating body and the pressure contact member are biased by a spring member. At least one of the sheet guides facing each other and the pressing mechanism that comes into contact with and separates from each other are movably supported in a direction away from the other sheet guide, and are positioned at the sheet conveyance path forming position by the biasing force of the spring member. A sheet conveying device comprising a movable supporting mechanism for holding the sheet.