JP2000264539A - Paper separation mechanism and printer equipped with the same - Google Patents

Abstract

(57) [Problem] To provide a highly operable printer which can save the trouble of separating two recording papers when loading roll paper. A transport separation unit of the present invention includes a first transport roller and a second transport roller below a paper path.
Further, a separation roller 41 is provided at a position facing the first transport roller 31 with the paper path interposed therebetween. The separation roller 41 is
It is detected that the leading end of the two sheets S has reached a predetermined position after passing between the separation roller 41 and the first transport roller 31, and based on the detected information, the separation roller 4
1 is configured to rotate in the reverse direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer using so-called W-roll paper (hereinafter, referred to as "W-roll paper") in which, for example, two recording papers are wound in a stacked state. In particular, 2 drawn from W roll paper
The present invention relates to a printer provided with a paper separating mechanism for separating two sheets of recording paper (hereinafter, referred to as “two sheets”).

[0002]

2. Description of the Related Art In general, for example, in a store or the like, a receipt on which items such as sales items and sales amounts are printed is issued for delivery to a customer. It is practiced to keep a journal on which items including contents are printed.

Conventionally, as shown in FIG. 7, after printing is performed on two sheets S drawn from so-called W roll paper r by a printing means 101, one of the recording sheets S1 is used as a receipt as a paper outlet 102. A printer 100 is known which is configured to be discharged from a recording paper S2 and wound up by a winding shaft 103 using the other recording paper S2 as a journal.

[0004]

By the way, in the conventional printer 100, in order to wind the recording paper S2,
When loading the W roll paper r into the printer 100, it is necessary to wind the recording paper S2 for a journal around the winding shaft 103.

Therefore, in the conventional printer 100, the recording paper S1 for the receipt and the recording paper S2 for the journal are separated from the two sheets S in an overlapping state by work.

However, there is a problem that the work of separating the two sheets S in an overlapped state is troublesome.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems of the prior art, and has an operability capable of eliminating the trouble of separating two recording papers when loading W roll paper. It is intended to provide a high printer.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a printing apparatus, comprising: a plurality of recording papers which are drawn along a paper path from a roll paper wound in a state of being stacked; In contact with at least one of the recording papers,
A transport member that moves the contacting recording paper along the paper path, and a recording sheet that is in contact with the recording paper on the opposite side of the transport member across the paper path, and that contacts the recording paper with the paper of the transport member. A separating member that separates at least one recording sheet from the plurality of recording sheets from the other recording sheet by moving a conveyance amount smaller than the conveyance amount. .

In the present application, the magnitude relation of the paper conveying force includes zero and negative numbers.

In the case of the present invention having the above-described structure, the difference between the paper conveying force applied by the conveying member and the paper conveying force applied by the separating member for a plurality of recording papers stacked in a stack is determined by the recording on the conveying member side. A speed difference occurs between the paper and the recording paper on the separation member side (hereinafter, referred to as “separation paper”). Since the paper conveying force of the separating member is made smaller than the paper conveying force of the conveying member, the separating paper can be slackened in the vicinity of the separating member with a delay from other recording paper.

Therefore, according to the present invention, the separation paper loosened by the separation member can be easily separated from other recording paper.

Further, as in the present invention, it is effective that the separating member is in the form of a rotatable roller and is rotated in a direction opposite to a rotating direction for moving the plurality of recording papers in the conveying direction. is there.

According to the above construction, the separation sheet can be sent in the opposite direction to the feeding direction of the plurality of recording sheets sent by the conveying member, so that the separation sheet can be sent from another recording sheet more quickly. Can be separated.

By rotating the separation member at a predetermined timing, the separation paper is further separated from the other recording paper, and the leading end of the separation paper is released from the state of contact with the separation member. It can be completely separated from other recording paper. Further, as in the present invention, the separation member is movably supported on the conveyance member side, and the conveyance member rotating when the conveyance member or the conveyance member is rotated when positioned on the conveyance roller side. It is also effective to rotate in the opposite direction by being rotated by. With the above configuration, the mechanism for rotating the separation member can be simplified.

Further, as in the present invention, the separating member may include:
When the plurality of recording sheets are stretched between the two conveyance members and are located between the two conveyance members provided along the conveyance direction, the plurality of recording papers contact each other to move toward the conveyance member side. Moving is also effective.

In the above invention, the separating member is, for example, 2
It is located on the opposite side to the transport member or between the transport members for rotating the transport member with respect to a plurality of recording sheets. Then, the separation member is moved away from the paper path in a direction approaching the conveyance member, and the plurality of recording sheets are bent.

In such a state, for example, at a predetermined time, by making the speed of the conveying member on the downstream side in the feeding direction of the two conveying members higher than the speed of the conveying member on the upstream side in the feeding direction, A plurality of recording papers are stretched between the two transport members.

Accordingly, the separating member moves in a direction approaching the transporting member or the transport rotating unit along a predetermined trajectory, and the separating member engages with the transporting member or the transport rotating unit rotating in the feeding direction. They rotate in the opposite direction by joining.

Therefore, it is possible to loosen and separate only the separation paper while keeping the plurality of recording papers stretched along the paper path.

Further, as in the present invention, it is also effective to have an extruding member for extruding the recording paper between the transporting member and the separating member so that the paper paths of the plurality of recording papers are bent. is there.

According to the above configuration, since the position of the slack formed on the separation sheet can be specified, it is effective in specifying the position where the separation sheet is pulled out, and the discharge port of the separated recording sheet can be easily set. .

In particular, since the separation sheet can be slackened between the state in which a plurality of recording sheets are stretched and the state in which the recording sheet is bent, the present invention is applicable when the separation member is separated from the leading end of the separation sheet. It is effective.

On the other hand, the invention according to claim 6 is a printing section for printing on the plurality of recording papers drawn out along a paper path from rolled paper wound in a state where a plurality of recording papers are stacked, A paper separation mechanism according to claim 1, a paper discharge unit configured to discharge at least one recording paper separated from a plurality of recording papers by the paper separation mechanism, and at least one of other recording papers. A printer comprising a paper take-up unit for taking up recording paper.

In the case of the invention described in claim 6, the plurality of recording papers pulled out from the roll paper are simply sent to the paper separation mechanism,
Separation paper can be automatically separated from other recording paper.

Therefore, according to the invention of claim 6, since the trouble of separating the recording paper when loading the roll paper can be omitted, a printer with high operability can be obtained.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a printer having a paper separating mechanism according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic configuration diagram showing a schematic configuration of the printer of the present embodiment. FIG. 2 is a schematic configuration diagram illustrating a schematic configuration of the transport separation unit of the present embodiment.

As shown in FIG. 1, the printer 1 of the present embodiment is drawn out from a W roll paper (hereinafter, referred to as “roll paper”) r stored in a roll paper storage unit 10.
The sheet S is passed through a pair of paper guide members 12 via a reversing member 11.
Is sent to the printing means (printing unit) 20 while guiding the paper to the paper path formed by the printer.

Further, the printer 1 transports the two sheets S printed by the printing means 20 to the transport separating means (paper separating mechanism) 3.
0, the recording paper S1 is separated into a recording paper S2 and the recording paper S1 is discharged from a paper discharge port (paper discharge part) 61, while the recording paper S2 is discharged by a winding means (a paper winding part having a winding shaft 71). )
It is configured to be wound by 70.

As shown in FIG. 1, as shown in FIG.
Is disposed on the lower rear side of the printer 1 (lower right side in FIG. 1), while the printing unit 20 is disposed on the upper front side of the printer 1 (upper left side in FIG. 1). Also, the winding means 70
Is disposed above the roll paper storage unit 10.

As shown in FIG. 1 or FIG. 2, the transport / separation means 30 is provided near the printing means 20, while the paper discharge port 61 is provided near the transport / separation means 30.

As shown in FIG. 2, the transport separation means 30 comprises:
A first conveying roller 31 and a second conveying roller 32 wound as rollers using, for example, rubber, as conveying members;
And a separation roller 41 wound in a roller shape using, for example, rubber or the like as a separation member.

Here, the printing means 20 comprises a print head 21 for performing printing by a dot impact method using an ink ribbon (not shown) and a platen 22 for supporting the ink ribbon. Are disposed to face each other across a paper path (corresponding to the two sheets S and the recording paper S2 shown).

As shown in FIG. 2, the first transport rollers 31,
The second transport roller 32 is located below the paper path (the two sheets S in FIG. 2).
(Below) is rotatably provided using a motor (not shown). The second transport roller 32 is disposed near the platen 22, while the first transport roller 31 is disposed downstream of the second transport roller in the feed direction A.

The separation roller 41 is rotatably provided at a predetermined distance from the first transport roller 31 at a position facing the first transport roller 31 across the paper path.

A sensor (not shown) detects that the separation roller 41 reaches a predetermined position after the leading end of the two sheets S has passed between the separation roller 41 and the first conveyance roller 31. The rotation of the separation roller 41 is controlled using, for example, a stepping motor (not shown) based on the detected information.

At a position near the print head 21 and opposed to the second transport roller 32 across the paper path, the two sheets S are pressed against the second transport roller 32 to feed the two sheets S. A driven roller 51 that is rotatable therewith is provided. Further, the separation roller 41 and the driven roller 51 are connected to the paper discharge port 61.
Are arranged at predetermined intervals in the vicinity of.

In this embodiment having such a configuration, the user of the printer 1 shown in FIG. 1 loads the roll paper r into the roll paper accommodating section 10 and pulls out the roll paper r from the roll paper r.
The sheet S is passed between the print head 21 and the platen 22, and the leading end portion of the sheet S is pushed to a position where the sheet S comes into contact with the second transport roller 32 of the transport separation unit 30 and the driven roller 51.

After that, for example, the first transport roller 31 and the second transport roller 32 are rotated in the clockwise direction in FIG. 2, and the separation roller 41 is rotated counterclockwise to make contact with the first transport roller 31. The sheet S moves to convey the two sheets S in the feed direction A, and the leading end of the two sheets S passes between the first conveyance roller 31 and the separation roller 41.

In this case, the recording paper S1 on the upper side of the two sheets S (outside with respect to the roll paper r) comes into contact with the separation roller 41, and the lower side of the two sheets S (inside with respect to the roll paper r). The recording paper S2 is in contact with the first transport roller 31.

When the leading end of the two sheets S reaches a predetermined position, the separation roller 41 is rotated clockwise as shown in FIG. 2 (rotation in the direction opposite to the rotation direction corresponding to the feed direction A). .

With this configuration, the separation roller 41 has a paper conveyance direction opposite to the paper conveyance force of the first conveyance roller 31 with respect to the paper conveyance force applied to the recording paper S1 and the recording paper S2 in the feeding direction A by the first conveyance roller 31. The transport force (that is, the first transport roller 3
Assuming that the paper transport force of No. 1 is positive, a negative paper transport force) is applied to the recording paper S1.

By applying the paper conveying force, the recording paper S1 is fed in the return direction B opposite to the feeding direction A of the recording paper S2 while sliding on the recording paper S2. Then, between the driven roller 51 and the separation roller 41, the recording paper S1 is slackened, and the slack portion gradually increases toward the paper discharge port 61.

Further, until the leading end portion of the recording paper S1 is discharged from the paper discharge port 61 via the separating roller 41, the separating roller 41 is connected to the separating roller 41 by the leading end of the recording paper S1.
It is rotated reversely by a predetermined number of rotations away from the pressing portion with the transport roller 31. After that, the separation roller 41 is moved to the first transport roller 31.
To stop rotation.

On the other hand, by rotating the first transport roller 31 and the second transport roller 32 in the direction of the arrow shown in FIG. 2, the recording paper S2 is fed toward the winding means 70 shown in FIG.

Then, the above-mentioned operator mounts the leading end portion of the recording paper S2 on the winding shaft 71 of the winding means 70.

As described above, according to the present embodiment,
The two sheets S pulled out from the roll paper r are transported by the separating means 3
0, and the separation roller 41 is rotated in reverse at a predetermined timing, whereby the two sheets S are automatically transferred to the recording sheet S1.
And the recording paper S2, and the recording paper S1 can be automatically discharged from the paper discharge port 61.

Therefore, when the roll paper r is loaded,
Since the labor for separating the recording papers S1 and S2 can be saved, and the labor for discharging the recording paper S1 from the paper discharge port 61 can be saved, a printer with high operability can be obtained.

FIG. 3 is a schematic configuration diagram showing a schematic configuration of the transport separation means according to the second embodiment of the present invention. FIG.
FIG. 3 is an explanatory diagram for explaining an operation of the transport separation unit of the embodiment.

Hereinafter, portions corresponding to those in the above-described embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 3, the transport / separation means 30A according to the present embodiment includes a first transport roller 31 and a second transport roller 32, which are the same as those in the above embodiment, as transport members.
As a separating member, for example, although not shown, a driven roller driven by a shaft suspended in an engaging groove 53 provided in a side wall of a main body frame formed by bending a bottom and a pair of side walls by sheet metal processing. And a separation roller 42 formed of a high-friction member such as rubber around the position opposed to. A separation gear (not shown) is provided on the rotation support shaft 42a of the separation roller 42 at an outer portion of the side wall.

In the case of this embodiment, the first transport roller 31
Is configured to control the rotation speed of the first transport roller 31 at a predetermined timing after the two sheets S pass through the first transport roller 31 using, for example, a clutch (not shown). At a position facing the first transport roller 31 across the paper path, a driven roller 54 that presses the two sheets S against the first transport roller and is rotatable as the two sheets S are fed is provided. I have.

A support member 52 is rotatably provided at an end portion of the driven roller 51 (a portion separated from the two sheets S in the width direction of the two sheets S). At the end of the driven roller 51, an engagement gear (conveyance rotating unit) (not shown) that can mesh with the separation gear is fixed.

On the other hand, a separation roller 42 is attached via a rotation support shaft 42a to a distal end portion (right portion in FIG. 3) of a support member 52 rotatably mounted on a support shaft 51b of the driven roller 51.
Are rotatably supported. The rotation support shaft 42a of the separation roller 42 engages with the engagement groove 53 as described above and engages with the engagement groove 53.
, The separation roller 42 can also move in the arrow C or D direction. When the rotation support shaft 42a moves in the direction of arrow D, the separation gear approaches the driven roller 51 side and meshes with the engagement gear, and when the rotation support shaft 42a moves in the direction of arrow C, the meshing is released. .

In this embodiment having such a configuration, the first transport roller 31 and the second transport roller 32 are
To rotate the leading end of the two sheets S between the first transport roller 31 and the driven roller 52. On the other hand, the separation roller 42 moves the support shaft 51b of the driven roller 51 in the direction of arrow C by a driven roller posture holding mechanism (not shown).

The movement of the separation roller 42 presses the two sheets S, whereby the two sheets S are transferred to the first transport roller 3.
Between the first and second transport rollers 32, the sheet is bent below the paper path.

Thereafter, the first transport roller 31 is rotated faster than the second transport roller 32 at a desired timing. As a result, the bent portion of the double sheet S is pulled toward the first transfer roller 31 due to the speed difference between the first transfer roller 31 and the second transfer roller 32, and the double sheet S is moved to the first transfer roller 3.
The first and second transport rollers 32 are in a stretched state.

As a result, as shown in FIG. 4, the separation roller 42 moves in the direction of arrow D to approach the driven roller 51, and the driven roller 51 rotates in conjunction with the feeding of the two sheets S. The engagement roller and the gear of the separation roller 42 mesh with each other, whereby the separation roller 42 rotates in the reverse direction.

By the reverse rotation of the separation roller 42, the recording paper S1 is slackened similarly to the above embodiment, and the slack portion gradually increases toward the paper discharge port 61 and is discharged from the paper discharge port 61. You.

As described above, according to the present embodiment,
Since the rotation power of the separation roller 42 can be obtained from the rotation of the driven roller 51, the rotation mechanism of the separation roller can be simplified.

The other configuration and operation and effect are the same as those of the above-described embodiment, so that detailed description thereof will be omitted.

FIG. 5 is a schematic configuration diagram showing a schematic configuration of the transport separation means according to the third embodiment of the present invention. FIG.
FIG. 3 is an explanatory diagram for explaining an operation of the transport separation unit of the embodiment.

Hereinafter, portions corresponding to those of the above-described embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 5, the transport / separation means 30B of the present embodiment has a second transport roller 32 similar to that of the above-described embodiment as a transport member, and a separation member 40B.

In the case of this embodiment, the second transport roller 32
, An engagement gear (not shown) is rotatably provided, for example, by interlocking with the second transport roller 32. The second transport roller 3 is located below the paper path.
A driven roller 55 that is rotatable with the feeding of the two sheets S is provided downstream of the second feeding direction A.

The separation member 40B is provided with an elongated lever 45.
And a separation roller 46 and a reversing roller 47 (extruding portion) rotatably supported at respective portions at both ends thereof. A gear (not shown) is provided at an end portion of the separation roller 42 as in the above embodiment.

The lever 45 has a rotation support shaft 45a at a position between the second transport roller 32 and the driven roller 55 and close to the paper path, and is provided rotatably about the rotation support shaft 45a. ing. The lever 45 is moved at a predetermined timing by using an arrow E shown in FIG.
Alternatively, it is configured to rotate in the F direction.

The separation roller 46 is disposed downstream in the feed direction A, while the reversing roller 47 is
It is located on the upstream side of.

When the lever 45 rotates in the direction of the arrow F, the separation roller 46 meshes with the above-described engagement gear and rotates in the reverse direction.

In the present embodiment having such a configuration, with the lever 45 disposed at the position shown in FIG. 5 and the separation roller 46 retracted above the paper path, the second transport roller 32 is moved to the position shown in FIG. Rotate clockwise as shown. Then, after the leading end portion of the two sheets S has passed through the driven roller 55, the lever 45 is rotated in the direction of arrow F at a predetermined timing.

As a result, as shown in FIG. 6, the two sheets S are pushed down by the separation roller 46 and pushed up by the reversing roller 47 between the second transport roller 32 and the driven roller 55, so that the two sheets S are pushed up. Paper S
Is in a state of being bent in a substantially S-shape. At this time, the separation roller 46 stops feeding only the recording paper S1, so that the recording paper S1 is slackened, and the slack portion is formed above the reversing roller 47 toward the paper discharge port 61.

Further, by rotating the lever 45 in the direction of arrow F and engaging the above-described engagement gear rotating in conjunction with the second transport roller 32 with the gear of the separation roller 46, the separation roller 46 is rotated in the reverse direction. Rotate.

By the reverse rotation of the separation roller 46, the recording paper S1 is further slackened as in the above embodiment, and the slack portion gradually increases in the direction of the paper discharge port 61 and is discharged from the paper discharge port 61. Is done.

As described above, according to the present embodiment,
Since the recording paper S1 can be slackened from the state where the two sheets S are stretched to the state where they are bent, the longer recording paper S1 can be pulled out from the paper discharge port 61.

According to the present embodiment, the recording paper S1
There is also an advantage that the slack can be guided to the paper discharge port 61 by the reversing roller 47.

The other configuration and operation and effect are the same as those of the above-described embodiment, and therefore, detailed description thereof will be omitted.

Note that the present invention is not limited to the above-described embodiment, and various changes can be made.

In the above embodiment, the roll paper wound with two recording papers stacked is used, but the roll paper wound with three or more recording papers stacked is transported by the present invention. It is also possible to apply to separation means.

For example, in the case of using three rolls of paper, the friction coefficient of the surface of the second recording paper that is in contact with the first recording paper is calculated using the third recording paper of the second recording paper. If the friction coefficient is smaller than the friction coefficient of the surface in contact with the recording paper, only the first sheet of recording paper can be separated by the transport separation means of the present invention.
Further, if the magnitude relation of the above-mentioned friction coefficients is reversed, it is also possible to separate the first and second recording papers by the transport separation means of the present invention.

Therefore, three or more roll papers can be applied to the present invention by appropriately changing the friction coefficient between the recording papers.

In the above embodiment, the paper conveying force of the separating member is set to be opposite to the paper conveying force of the conveying member.
It is also possible that the paper conveying force of the separation member is zero or smaller than the paper conveying force of the conveying member, and that the direction of the paper conveying force of the conveying member is the same.

Here, the paper conveying force of the separating member is zero when the separating member is fixed at a position facing the conveying member across the paper path. Further, the paper conveyance force of the separation member is smaller than the paper conveyance force of the conveyance member, and the same direction as the paper conveyance force of the conveyance member means that the friction coefficient of the separation member is smaller than the friction coefficient of the conveyance member. is there.

However, the above embodiment is effective in that the separation sheet can be quickly separated from other recording sheets in a relatively short sheet path.

[0084]

As described above, according to the present invention, the difference between the paper conveyance force provided by the conveyance member and the paper conveyance force provided by the separation member for a plurality of recording papers stacked in a stack is obtained. A speed difference occurs between the recording sheet on the conveying member side and the recording sheet on the separation member side. Since the paper conveying force of the separating member is made smaller than the paper conveying force of the conveying member, the separating paper can be slackened in the vicinity of the separating member with a delay from other recording paper.

Therefore, according to the present invention, the separation sheet loosened by the separation member can be easily separated from other recording sheets, and the trouble of separating two recording sheets when loading the roll sheet can be eliminated. And a highly operable printer can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating a schematic configuration of a printer according to an embodiment.

FIG. 2 is a schematic configuration diagram illustrating a schematic configuration of a transport separation unit according to the present embodiment.

FIG. 3 is a schematic configuration diagram illustrating a schematic configuration of a transport separation unit according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram for explaining an operation of the transport separation means of the embodiment.

FIG. 5 is a schematic configuration diagram illustrating a schematic configuration of a conveyance separation unit according to a third embodiment of the present invention.

FIG. 6 is an explanatory diagram for explaining an operation of the transport separation unit according to the embodiment.

FIG. 7 is a schematic configuration diagram illustrating a schematic configuration of a conventional printer.

[Explanation of symbols]

 Reference Signs List 20 printing means (printing section) 30, 30A, 30B transport separation means (paper separation mechanism) 31, 32 transport rollers (transport member) 41, 42, 46 separation roller (separation member) 61 paper discharge port (paper discharge section) 70 Take-up means (paper take-up section) 71 Take-up shaft r Roll paper (roll paper) S1, S2 Recording paper

Claims (6)

[Claims] 1. A recording device according to claim 1, wherein said recording paper is in contact with at least one of said plurality of recording papers drawn out along a paper path from rolled paper wound in a state where a plurality of recording papers are stacked. A transport member that moves paper along the paper path; and a sheet that is in contact with the recording paper on the opposite side of the transport member across the paper path, and the contacting recording paper is smaller than the paper transport amount of the transport member. A separating member for separating at least one recording sheet from the plurality of recording sheets from the other recording sheets by moving a conveyance amount. 2. The apparatus according to claim 1, wherein the separating member is formed in a rotatable roller shape, and is configured to rotate in a direction opposite to a rotating direction for moving the plurality of recording sheets in the transport direction. The paper separating mechanism according to claim 1, wherein 3. The separation member is movably supported on the conveyance member side, and is rotated by the rotation of the conveyance member or a conveyance rotation unit for rotating the conveyance member when positioned on the conveyance roller side. The paper separating mechanism according to claim 2, wherein 4. The separation member is located between two conveyance members provided along a conveyance direction, and comes into contact when the plurality of recording papers are stretched between the two conveyance members. The paper separation mechanism according to claim 3, wherein the paper separation mechanism is moved toward the transport member by a plurality of recording papers. 5. The paper according to claim 1, further comprising an extruding member for extruding the recording paper between the transport member and the separation member such that the paper paths of the plurality of recording papers are bent. Separation mechanism 6. A printing unit for printing on a plurality of recording papers drawn out along a paper path from rolled paper wound in a state where a plurality of recording papers are stacked, and a printing unit according to claim 1. 2. The paper separation mechanism according to claim 1, a paper discharge unit configured to discharge at least one recording paper separated from the plurality of recording papers by the paper separation mechanism, and winding up at least one of the other recording papers And a paper winding section for the printer.