JP3769865B2 - Winding mechanism and printer using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a winding mechanism for winding recording paper such as journal paper and a printer using the winding mechanism.
[0002]
[Prior art]
Conventionally, for the purpose of sales and inventory management in stores, etc., it has been widely used to store journal papers on which sales prices, product names, etc. have been printed. There has been proposed a printer configured to be wound on a winding shaft.
[0003]
As this type of printer, for example, a printer as shown in FIG. 9 is known.
[0004]
As shown in FIG. 9, this printer 101 is a dot impact printer incorporated in a cash register or the like. As shown in the figure, a printer main body 103 to which a ribbon cassette 102 can be attached and detached, and an upper part of the upper portion of the printer main body 103 near the rear. The clamshell movable portion 104 is rotatably supported at a position, and a winding mechanism 105 provided at the rear of the printer main body 103.
[0005]
In this printer, a recording paper 106 such as journal paper printed by a print head (not shown) is sent out above the clamshell movable portion 104 by the paper feeding means 107 shown in FIG. 10 or FIG. It is configured to be wound around the winding shaft 109 of the winding mechanism 105 through the flat portion 108 a of 108.
[0006]
The take-up shaft 109 is cantilevered and supported by a support plate 110 fixed to the rear of the printer main body 103, and a disk-like take-up flange 111 is fixed to a portion on the support plate 110 side. A driving gear 112 is fixed to the tip of the winding shaft 109 on the support plate 110 side. The take-up shaft 109 is driven to rotate by meshing between a gear group 114 that is rotated by a take-up belt 113 that is linked to a paper feed mechanism in the printer main body 103 and a gear 112 that is fixed to the take-up shaft 109. It has become so.
[0007]
10 and 11 show the principle of winding the recording paper 106 by the winding mechanism 105 used in the printer 101. FIG.
[0008]
In the conventional example shown in FIG. 10, the distance between the paper feeding means 107 and the winding portion of the take-up shaft 109 is configured to be the same over the entire paper width of the recording paper 106 and is generated by the take-up force f ₁ . The winding reaction force r ₁ is applied uniformly to each part in the paper width direction so that the recording paper 106 does not meander.
[0009]
On the other hand, in the case of the conventional example shown in FIG. 11, the winding shaft 109 is tilted so that the paper feed path length at the end on the side without the winding flange 111 is the longest, and the winding force winding f ₂ of the winding shaft 109 is taken. The recording paper 106 is pressed against the take-up flange 111 by applying the component r ₃ of the take-up reaction force r ₂ toward the take-up flange 111 caused by the above-mentioned (for example, Japanese Utility Model Publication No. 64-1313). According to this configuration, the edge of the recording paper 106 can be rolled up with the winding flange 111 aligned.
[0010]
[Problems to be solved by the invention]
However, such a conventional winding mechanism has the following problems. That is, in the case of the conventional example shown in FIG. 10, in order to prevent the recording paper 106 from meandering, the winding force N ₁ at the paper feeding portion must be made equal in each portion of the recording paper 106 in the paper width direction. For this purpose, high component accuracy and assembly accuracy are required, which causes an increase in cost.
[0011]
On the other hand, in the case of the conventional example shown in FIG. 11, the winding force f ₂ is concentrated on one end of the recording paper 106 in the paper width direction. The recording paper 106 may meander as a result of the winding force N ₂ acting on the end of the recording sheet and pulling that portion and further loosening the portion 106 a on the opposite side. If the recording paper 106 meanders, there is a problem that the guide member 116 contacts and the end portion is bent.
[0012]
The present invention has been made in order to solve the above-described problems of the conventional technology. The object of the present invention is to provide a recording paper with a simple configuration without requiring high parts accuracy and assembly accuracy. It is an object of the present invention to provide a winding mechanism capable of performing stable winding and a printer using the winding mechanism.
[0013]
[Means for Solving the Problems]
The winding mechanism of the present invention is
Paper feeding means for sequentially feeding long recording paper in the longitudinal direction;
A winding means having a winding shaft for winding the recording paper fed by the paper feeding means;
A paper feed regulating member for regulating the paper feed of the recording paper such that the paper feed path length at the center in the paper width direction of the recording paper is longer than the paper feed path length at both ends in the paper width direction;
In the winding mechanism with
The paper feed regulating member has at least one protrusion that protrudes in a direction intersecting the recording paper surface at a portion corresponding to the central portion of the recording paper in the paper width direction,
The take-up means has a take-up shaft that is cantilevered and is provided with a take-up flange at one end of the take-up shaft. Further, when taking up the recording paper, the take-up shaft Having pressing means to press against the flange;
The pressing means is such that the paper feed path length at the end of the take-up shaft on the side where the take-up flange is not provided is longer than the paper feed path length at the end on the side where the take-up flange is provided. And the winding shaft is inclined.
The printer of the present invention
Printing means for printing on a recording paper mounted on the apparatus body;
The winding mechanism described above;
Have
The recording paper printed by the printing means is configured to be wound by the winding mechanism.
Further, the paper feed restricting member of the winding mechanism also serves as a writing table for printing correction provided on the downstream side of the printing means in the paper feed direction.
[0026]
According to the invention described in claim 2, it is possible to reliably wind a recording paper such as a printed journal paper without causing meandering, and to obtain a printer that does not require high parts accuracy and assembly accuracy. be able to.
[0028]
According to the third aspect of the present invention, the number of parts can be reduced in the printer that can correct the recording paper after printing.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a winding mechanism and a printer using the winding mechanism according to the present invention will be described below in detail with reference to the drawings.
[0030]
1 is a perspective view showing the overall configuration of an embodiment of a printer according to the present invention, FIG. 2 is a plan view of the printer of FIG. 1, and FIG. 3 is a view in the direction of arrow B (side view) of FIG. 4 is a cross-sectional view taken along the line CC of FIG. 2, and FIG. 5 is a rear perspective view of the printer of FIG.
[0031]
As shown in FIG. 1, the printer 1 according to the present embodiment is a dot impact printer incorporated in a cash register or the like, in a printer main body 3 to which a ribbon cassette 2 can be attached and detached, and a position close to the rear part on the upper part of the printer main body 3. The clamshell movable portion 4 is rotatably supported, and a winding mechanism 5 is provided behind the printer main body 3.
[0032]
The printer body 3 includes a printing mechanism (not shown) that reciprocally moves a carriage on which the print head 6 is mounted in the width direction of the recording papers 7 and 8, and a paper feed for feeding the recording papers 7 and 8 to a printing position by the printing head 6. A mechanism and a drive motor 9 which is a drive source common to the printing mechanism and the paper feeding mechanism are provided.
[0033]
On the other hand, the clamshell movable portion 4 is disposed on the platen 10, the paper feed roller 11 and the paper feed roller 12 that presses the recording paper against the platen 10, and the receipt paper 8 disposed above the paper feed means 13. And an upper paper guide 15 formed of resin, and other components are attached to the upper paper guide 15 as a base.
[0034]
Here, the upper paper guide 15 is formed with a protrusion (not shown) that engages with a hole 3a disposed in the frame 3A of the printer body 3, and the clamshell is movable by engaging this protrusion with the hole. The rotation center axis 16 of the part is configured.
[0035]
The upper paper guide 15 is also formed with a locking portion (not shown) that engages with a claw portion (not shown) that is rotatably mounted on the printer body 3. With the above configuration, the upper paper guide 15 is normally fixed at a fixed position by a claw portion, and a rotation center shaft which is a support portion by the printer main body 3 by releasing the engagement between the claw portion and the locking portion. It is rotated around 16.
[0036]
As shown in FIGS. 4 and 5, the clamshell movable portion 4 is formed of a paper path 20 formed by an upper paper guide 15 and a lower paper guide 19 from the paper feed ports 17 and 18 at the rear of the printer body 3 to the printing position. Is provided so as to be rotatable at a position in the upper rear part of the printer main body 3 so as to be exposed. In FIG. 4, a solid line indicates a closed state of the clamshell movable portion 4, and an imaginary line (two-dot chain line) indicates an open state of the clamshell movable portion 4.
[0037]
As shown in FIG. 2, the paper feed ports 17 and 18 are arranged side by side at the rear of the clamshell movable portion 4.
[0038]
The paper feed port 17 is supplied with a recording paper 7 such as journal paper stored in the store for managing sales and inventory. As shown in FIG. 4, the recording paper 7 is arranged at the lower rear part of the printer main body 3, and the leading end of the recording paper 7 reaches the printing position from the paper supply port 17 through the paper path 20. Then, the printed recording paper 7 is sequentially passed from the discharge port 21 through the writing table 22 provided above the clamshell movable portion 4 and wound by the winding mechanism 5 attached to the rear portion of the printer body 3. It is wound around the take-up shaft 23.
[0039]
The take-up shaft 23 is cantilevered and supported by a support plate 24 fixed to the rear of the printer body 3 in a rotatable manner, and a disk-like take-up flange 25 is fixed to a portion on the support plate 24 side. . A driving gear 26 is fixed to the tip of the winding shaft 23 on the support plate 24 side. The take-up shaft 23 meshes with a gear group 28 that is rotationally driven by a take-up belt 27 that is linked to the paper feeding means 13 in the printer body 3 and a gear 26 that is fixed to the front end of the take-up shaft 23. Are driven to rotate.
[0040]
Further, the winding shaft 23 has a paper feed path length at an end portion where the winding flange 25 is not provided longer than a paper feed path length at an end portion where the winding flange 25 is provided. It is inclined to. In this case, an angle smaller than that of the conventional example shown in FIG.
[0041]
On the other hand, a recording paper 8 such as a receipt paper to be delivered to the customer is supplied to the paper supply port 18. The recording paper 8 reaches the printing position through the same paper path 20 as the recording paper 7, and after being printed, is sent upward from a receipt discharge port 29 provided on the upper surface of the clamshell movable portion 4.
[0042]
As shown in FIG. 4, a stamp set 30 for imprinting a store name or the like is detachably mounted below the paper feed port 18 through which the recording paper 8 is fed.
[0043]
Further, the paper feed ports 17 and 18 are provided with a feeding roller 31 for feeding out the recording paper 7 and the recording paper 8. As shown in FIG. 4, the feeding roller 31 is disposed at a position that is raised by a predetermined amount from the rotation center shaft 16 of the clamshell movable portion 4, that is, a position near the upper end of the rear portion of the clamshell movable portion 4. ing.
[0044]
The feeding roller 31 is always rotated during operation of the printer, and when the recording paper 7 and the recording paper 8 are fed, when the paper is tensioned by the driving force generated by the paper feeding roller 11, the feeding roller 31. A frictional force is generated between the paper and the paper, and the paper is fed out in the transport direction. Thereby, it is possible to reduce the paper feeding load caused by the inertial mass of the roll paper.
[0045]
The feed roller 31 has a roller shaft drive gear 32 disposed on the clamshell movable portion 4 side, and is rotatably attached to a part 15a of the upper paper guide 15 that forms the paper feed ports 17 and 18. . A transmission gear 33 that meshes with the roller shaft drive gear 32 to rotate the feed roller 31 is supported coaxially with the rotation center shaft 16 of the clamshell movable portion 4 on the printer body 3 side. With this configuration, the roller shaft driving gear 32 on the clamshell movable portion 4 side and the transmission gear 33 on the printer main body 3 side are not disengaged even when the clamshell movable portion 4 is opened.
[0046]
On the other hand, as shown in FIG. 2 or 5, the clamshell movable portion 4 is equipped with an auto cutter mechanism 14 for cutting the continuous recording paper 8 and a cutter drive source 34 for driving the auto cutter mechanism 14. ing. The cutter drive source 34 for driving the auto cutter mechanism 14 is a high torque type motor, and is disposed under the journal printing correction writing table 22 provided in the cutter frame 35 of the clamshell movable portion 4 to improve the operation safety. The motor cover 36 is covered in consideration.
[0047]
In the present embodiment, it is preferable to convey the recording paper 7 so as to be orthogonal to the line of sight in order for an operator such as a store clerk to easily see the printed result of a receipt or the like when the printer is horizontally disposed. The flat portion 22a of the writing table 22 is formed so as to be inclined toward the front side by pressing the metal plate, and a space is formed below the flat portion 22a. In the case of the present embodiment, a DC motor that is the cutter drive source 34 is arranged using the space below it. The writing table 22 may be formed by obliquely machining a part of the cutter frame 35.
[0048]
On the other hand, in the present embodiment, a projection 220 for preventing the recording paper from meandering is provided at the central portion in the paper width direction of the flat surface portion 22a of the writing table 22. In the case of the present embodiment, the protrusions 220a and 220b are integrally formed at both ends in the paper feed direction of the flat surface portion 22a of the writing table 22 by, for example, sheet metal processing.
[0049]
FIG. 6 illustrates the principle of the present invention.
[0050]
Here, in order to facilitate understanding, a case where one projection 220 is provided on the flat surface portion 22a of the writing table 22 will be described as an example.
[0051]
As shown in FIG. 6, the present invention, particularly the above-described embodiment, is configured such that the flat portion 22 a of the writing table 22 is positioned between the paper feeding means 13 and the winding means 5. In this case, as described above, the flat surface portion 22a of the writing table 22 is inclined toward the front side, and the take-up shaft 23 is positioned below the writing table 22. Therefore, when winding the recording paper, The recording paper is bent downward on the downstream side of the writing table 22 in the paper feeding direction and is in close contact with the flat portion 22 a of the writing table 22.
[0052]
On the other hand, in the case of the present embodiment, the take-up shaft 23 has a paper feed path length at the end on the side where the take-up flange 25 is not provided, and the paper at the end on the side where the take-up flange 25 is provided. Since it is inclined so as to be longer than the feed path length, recording is performed on a straight line M connecting the projection 220 of the writing table 22 and the end of the winding shaft 23 on the side where the winding flange 25 is not provided. The paper is stretched, and a winding reaction force R ₁ with respect to the winding force F is generated along the straight line M.
[0053]
As a result, since the component force R ₂ of the winding reaction force R ₁ in the direction toward the winding flange 25 acts on the recording paper on the winding shaft 23, the recording paper is pressed against the winding flange 25. Thus, the winding is performed along the winding flange 25.
[0054]
On the other hand, in the case of the present embodiment, since the writing table 22 is provided with the protrusion 220, the paper feed path length at the center in the paper width direction is longer than the paper feed path length at both ends in the paper width direction. In the flat surface portion 22a, the winding force T with respect to the recording paper concentrates on the central portion in the paper width direction and acts in the paper feeding direction, so that the recording paper does not meander and the paper feeding of the recording paper is stable. Is possible. As a result, according to the present embodiment, the end face of the recording paper is not broken by the meandering of the recording paper.
[0055]
In particular, as in the embodiment shown in FIG. 1, if the plurality of protrusions 220a and 220b are provided on the flat surface portion 22a of the writing table 22, the meandering of the recording paper can be prevented more reliably.
[0056]
On the other hand, in the case of the present embodiment, it is not necessary to consider applying a uniform force to each portion in the paper width direction of the recording paper, and therefore high parts accuracy and assembly accuracy are not required. Therefore, according to the present embodiment, it is possible to reduce the unit price and assembly cost.
[0057]
The present invention is not limited to the above-described embodiment, and various changes can be made.
[0058]
For example, the protrusion 220 of the writing table 22 is not limited to the above-described one, and can have various shapes.
[0059]
7 and 8 show a modified example of the protrusion 220 of the writing table 22, and as shown in FIG. 7, the end surface on the winding shaft 23 side of the flat surface portion 22a of the writing table 22 is angled over the entire paper width. The protrusion 220A can be provided at the center by forming it in the shape of a mountain, or the protrusion 220B can be provided at the center by forming the part in an arc as shown in FIG. it can.
[0060]
Further, the protrusion 220 of the writing table 22 can be formed by various methods.
[0061]
Furthermore, the position where the above-described protrusion 220 is provided is not necessarily limited to the flat surface 22a of the writing table 22, and a paper feed restricting member having a similar protrusion can be separately provided. However, if the protrusion 220 is provided on the flat surface 22a of the writing table 22 as in the above-described embodiment, the number of parts can be reduced.
[0062]
When the paper feed regulating member is provided separately from the writing table, it is arranged between the paper feed means 13 and the winding means 5 and in the vicinity of the paper feed means 13 in order to reliably prevent the meandering of the recording paper. It is preferable to do.
[0063]
On the other hand, in the above-mentioned embodiment, the type in which the winding shaft 23 of the winding mechanism 5 is cantilevered has been described as an example, but the present invention is not limited to this, and the winding shaft is supported at both ends. It can also be applied to things. However, it is most effective when the winding shaft of the winding means is cantilevered as in the above-described embodiment.
[0064]
Furthermore, the present invention can be applied not only to a dot impact printer but also to various printers such as a thermal printer and an ink jet printer.
[0065]
【The invention's effect】
As described above, according to the winding mechanism of the present invention, it is possible to stably wind the recording paper without causing meandering, so that it is possible to reliably prevent the end face from being bent during winding. it can.
[0066]
In addition, according to the winding mechanism of the present invention, high component accuracy and assembly accuracy are not required, so that it is possible to reduce the unit cost and assembly cost.
[0067]
Therefore, according to the present invention, a printer having high winding quality and capable of stably winding recording paper can be provided at low cost.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an overall configuration of an embodiment of a printer according to the present invention.
FIG. 2 is a plan view of the printer of FIG.
3 is a view (side view) in the direction of arrow B in FIG. 2;
4 is a cross-sectional view taken along line CC in FIG.
FIG. 5 is a rear perspective view of the printer of FIG. 1;
FIG. 6 is an explanatory diagram showing the principle of the present invention.
FIG. 7 is an explanatory diagram showing another example of a protrusion.
FIG. 8 is an explanatory view showing still another example of a protrusion.
FIG. 9 is a perspective view illustrating an overall configuration of a conventional printer.
FIG. 10 is an explanatory diagram showing a recording paper winding principle by a winding mechanism according to a conventional example.
FIG. 11 is an explanatory diagram showing a recording paper winding principle by a winding mechanism according to another conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Printer 2 Ink ribbon 3 Printer main body 5 Winding mechanism 6 Print head 7, 8 Recording paper 10 Platen 11 Paper feeding roller 12 Paper pressing roller 13 Paper feeding means 22 Writing stand 22 Flat surface part 220 (220a, 220b) Projection part 23 Winding Winding shaft 25 Winding flange F Winding force S Straight line R ₁ Winding reaction force R ₂ Winding reaction force component T Winding force

Claims (3)

Paper feeding means for sequentially feeding long recording paper in the longitudinal direction;
A winding means having a winding shaft for winding the recording paper fed by the paper feeding means;
A paper feed regulating member for regulating the paper feed of the recording paper such that the paper feed path length at the center in the paper width direction of the recording paper is longer than the paper feed path length at both ends in the paper width direction;
In the winding mechanism with
The paper feed regulating member has at least one protrusion that protrudes in a direction intersecting the recording paper surface at a portion corresponding to the central portion of the recording paper in the paper width direction,
The take-up means has a take-up shaft that is cantilevered and is provided with a take-up flange at one end of the take-up shaft. Further, when taking up the recording paper, the take-up shaft Having pressing means to press against the flange;
The pressing means is such that the paper feed path length at the end of the take-up shaft on the side where the take-up flange is not provided is longer than the paper feed path length at the end on the side where the take-up flange is provided. The winding mechanism is characterized in that the winding shaft is inclined. Printing means for printing on a recording paper mounted on the apparatus body;
A winding mechanism according to claim 1;
Have
A printer characterized in that the recording paper printed by the printing means is wound up by the winding mechanism.   3. The printer according to claim 2, wherein the paper feed restricting member of the winding mechanism also serves as a writing table for correction of printing provided on the downstream side of the printing means in the paper feed direction.

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