KR102604532B1 - Device for detecting and removing print paper jams in printer - Google Patents

Abstract

The paper jam detection and removal device 100 of the printer 1 is disposed between the platen roller 20 and the cutting unit 30, and includes a rotation shaft 110 installed at the front bottom of the platen roller 20. ; Paper whose central part is coupled to the rotating shaft 110, a printing paper guide 121 located adjacent to the platen roller 20 at the upper part, and an extension part 122 extending downward at the lower part. Jam detection lever (120); Elastic means 130 for applying force to the printing paper guide 121 of the paper jam detection lever 120 toward the platen roller 20; and a detection means (140) for detecting a printing paper jam between the platen roller (20) and the cutting unit (30), when a printing paper jam occurs between the platen roller (20) and the cutting unit (30). , the detection means 140 detects that the paper jam detection lever 120 rotates around the rotation axis 110 and generates a signal.

Description

Printer jam detection and removal device {DEVICE FOR DETECTING AND REMOVING PRINT PAPER JAMS IN PRINTER}

The present invention relates to a device for detecting and removing printing paper jams in a printer, and more specifically, to detecting a printing paper jam between the platen roller and the cutting unit of the printer, stopping the printing operation, and rotating the platen roller in reverse. This relates to a printing paper jam detection and removal device for a printer that can remove printing paper jams by

Generally, for example, printers for document printing use a printer that stores a paper tray (cassette) loaded with standardized paper (e.g., A4, B4, etc.) in the printer body and supplies printing paper as a single sheet. can be; A printer for printing labels, invoices, receipts, etc. can be used that continuously supplies roll-shaped printing paper and cuts it into unit lengths and discharges it after printing is completed.

The printing paper used in the latter printer (hereinafter referred to as 'label printer') is coated with adhesive on the back and contains information on the product name, price, bar code, expiration date, etc. on the front, or the shipping address and recipient for product delivery. Information about the business name, address, phone number, etc., or payment information for products or services, is printed out, and the printed labels, invoices, receipts, etc. are used by attaching them to the product or delivery box. .

Labels and invoice paper used in label printers are wound in rolls and stored inside the printer body or stored in the paper supply section outside the printer body, and are printed as the printing paper is transferred a predetermined length by the paper transfer unit. Supplied as a unit.

Then, the printing paper that has completed printing in the printing unit is discharged to the output outlet of the printer by a driving roller and then cut by a cutter.

In a cutter typically mounted on a label printer, a moving blade movably installed on the printer body moves by a moving member and engages a fixed blade fixedly installed on the printer body to cut the printing paper.

However, in the label printer described above, as the cutting unit of the label printer cuts the label paper while the moving blade and the fixed blade engage, some of the adhesive applied to the back of the label paper is attached to the moving blade or the fixed blade and moves. It accumulates at the engaging part of the blade and the fixed blade, and as a result, the leading edge of the printing paper comes into contact with the accumulated area of the adhesive part of the moving blade or the fixed blade, which may cause the printing paper to become stuck without passing between the moving blade and the fixed blade. .

Additionally, even in printers that print receipts, etc. using continuous paper, the leading edge of the printing paper may get caught on the moving blade or the fixed blade, preventing it from passing between the moving blade and the fixed blade, resulting in a jam.

Additionally, when printing receipts using continuous paper, if the user is careless, such as pulling the printed receipt forcibly, the printing paper may be torn or misaligned, causing the printing paper to get caught on the moving blade or fixed blade. It may not pass between the moving blade and the fixed blade and a jam may occur.

In this way, if the printed paper does not pass through the cutting unit and is caught between the cutting unit and the platen roller, the drive motor of the driving means may be overloaded, causing a printer failure, As printing continues, a printing paper jam may occur or the printed paper may become entangled in the platen roller.

In order to solve this problem, in Korean Patent No. 10-1282299, as shown in FIG. 1, when the printing paper is jammed during operation of the printer, the lever 501 provided on one side of the housing is operated to A printer cutter structure 500 that can easily release a jammed state is disclosed. However, in Korean Patent No. 10-1282299, the jamming of printing paper has progressed to a significant extent and the user can tell when the printer is not operating normally, so there is a problem in that early detection of jamming of printing paper is difficult. As a result, the driving motor 502 of the driving means may be overloaded, causing a printer malfunction, and printed paper may become entangled in the platen roller as printing continues.

Meanwhile, in Korean Patent Publication No. 10-2016-0124183, as shown in FIG. 2, an upstream entanglement prevention member 601 and a downstream entanglement prevention member 601 are installed on the upstream and downstream sides of the platen roller 601 of the printer, respectively. A curling prevention device 600 for labels without release paper is disclosed in a thermal printer equipped with a curling prevention member 602. However, in Korean Patent Publication No. 10-2016-0124183, it is possible to prevent label entanglement on the upstream or downstream side of the platen roller, but label paper is prevented between the cutting unit 700 and the platen roller 601. When a jam occurs, the label paper jam progresses significantly and the user can tell when the printer does not operate normally, making early detection of the label paper jam difficult. As a result, the driving motor of the driving means may be overloaded, causing a printer malfunction.

The present invention is to solve the above problems, and the purpose of the present invention is to detect at an early stage that a printing paper jam has occurred between the platen roller and the cutting unit of the printer and to stop the printing operation. The aim is to provide a printing paper jam detection and removal device for a printer that can easily remove a printing paper jam by rotating it in reverse. However, these tasks are illustrative and do not limit the scope of the present invention.

According to one embodiment of the present invention, a paper supply unit that continuously supplies printing paper, a thermal head having a heating element, and a thermal head that engages with the thermal head to transfer the printing paper by rotational drive and supply it to the heating element of the thermal head. A printing paper jam detection and removal device in a printer including a platen roller that prints predetermined content on the surface of the printing paper according to the printing data, a cutting unit that cuts the printed printing paper, and a driving unit, is the above. a rotation axis disposed between the platen roller and the cutting unit and installed at the front lower end of the platen roller; The central part is coupled to the rotation axis, and the upper part is provided with a printing paper guide that has a contour corresponding to the outline of the outer peripheral surface of the platen roller and is located adjacent to the platen roller, and the lower part has an extension part extending downward. A paper jam detection lever provided; Elastic means for applying force to direct the printing paper guide of the paper jam detection lever toward the platen roller; and a detection means for detecting a printing paper jam between the platen roller and the cutting unit, wherein when a printing paper jam occurs between the platen roller and the cutting unit, the paper jam detection lever moves the rotating shaft. The sensing means may detect rotation toward the center and generate a signal.

In the device for detecting and removing a printing paper jam in a printer according to an embodiment of the present invention, the sensing means includes a sensor detection protrusion protruding from the front of the extension portion of the paper jam detection lever and a receiving groove in which the sensor detection protrusion is accommodated. It may be comprised of a detection sensor disposed in front of the sensor detection protrusion.

In addition, in the printer's printing paper jam detection and removal device according to an embodiment of the present invention, when the sensor detection protrusion of the detection means is detected to be located in the receiving groove of the detection sensor, the printer is operated normally, and the detection means is operated normally. When detecting that the sensor detection protrusion deviates from the receiving groove of the detection sensor, a signal can be generated to stop the printing operation of the printer.

In addition, in the printer's printing paper jam detection and removal device according to an embodiment of the present invention, when detecting that the sensor detection protrusion of the detection means deviates from the receiving groove of the detection sensor, a signal is generated to control the printing operation of the printer. After stopping, the platen roller can be reversely rotated until the sensor detection protrusion returns into the receiving groove of the detection sensor.

In addition, in the apparatus for detecting and removing printing paper jams of a printer according to an embodiment of the present invention, the platen roller can be further reversely rotated for a predetermined time after the sensor detection protrusion returns to the receiving groove of the detection sensor. there is.

In addition, in the device for detecting and removing a printing paper jam in a printer according to an embodiment of the present invention, the detection means consists of a toggle switch, and when the extension of the printing paper jam detection lever presses the toggle switch, the printer operates normally. And, when the paper jam detection lever moves away from the toggle switch, the printing operation of the printer can be stopped.

In addition, in the device for detecting and removing a printing paper jam in a printer according to an embodiment of the present invention, the printing paper guide of the paper jam detection lever and the platen roller are moved by the force applied by the elastic means to the paper jam detection lever. The gap between them can be maintained in the range of about 0.01mm - 0.05mm.

Meanwhile, a printer according to another embodiment of the present invention may use any one of the above-described printing paper jam detection and removal devices.

According to the device for detecting and removing a printing paper jam in a printer according to the present invention as described above, the occurrence of a printing paper jam between the platen roller and the cutting unit of the printer can be detected early and the printing operation can be stopped, Printing paper jams can be easily removed by rotating the platen roller in reverse, thereby preventing printer failure. However, these effects are illustrative and do not limit the scope of the present invention.

Figure 1 is a perspective view showing a structure for releasing a jammed state of printing paper in a printer according to the prior art.
Figure 2 is a schematic side cross-sectional view showing a device for preventing label entanglement in a thermal printer according to another prior art.
Figure 3 is a perspective view showing a printer to which a printing paper jam detection and removal device according to an embodiment of the present invention is applied.
Figure 4 is a cross-sectional perspective view of a printer to which a printing paper jam detection and removal device according to an embodiment of the present invention is applied.
Figure 5 is a cross-sectional view of a printer to which a printing paper jam detection and removal device according to an embodiment of the present invention is applied.
Figure 6 is a perspective view of a printing paper jam detection and removal device according to an embodiment of the present invention.
Figure 7 is an exploded perspective view of the printing paper jam detection and removal device of Figure 6.
Figure 8 is a view similar to Figure 5, and is a cross-sectional view showing a normal operating state of the printing paper jam detection and removal device according to an embodiment of the present invention.
Figure 9 is a cross-sectional view showing a paper jam occurring between the platen roller and the cutting unit in a printer equipped with a printing paper jam detection and removal device according to an embodiment of the present invention.
Figure 10 is a cross-sectional view showing a paper jam occurring between the platen roller and the cutting unit in a printer equipped with a printing paper jam detection and removal device according to an embodiment of the present invention.

The purpose, features and advantages of the present invention described above will become clearer through the following examples in conjunction with the attached drawings.

The following specific structural and functional descriptions are merely illustrative for the purpose of explaining embodiments according to the concept of the present invention. Embodiments according to the concept of the present invention may be implemented in various forms and may be implemented in various forms and may be described in the present specification or application. It should not be construed as limited to the examples.

Since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments will be illustrated in the drawings and described in detail in the specification or application. However, this is not intended to limit the embodiments according to the concept of the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

Terms such as first and/or second may be used to describe various components, but the components are not limited to the terms. The above terms are used only for the purpose of distinguishing one component from other components, for example, without departing from the scope of rights according to the concept of the present invention, a first component may be named a second component, and similar Likewise, the second component may also be called the first component.

When a component is said to be "connected" or "connected" to another component, it means that it may be directly connected to or connected to that other component, but that other components may also exist in between. It must be understood. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between. Other expressions to describe the relationship between components, such as “between” and “immediately between” or “adjacent to” and “directly adjacent to” should be interpreted similarly.

The terms used in this specification are merely used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate the presence of the described features, numbers, steps, operations, components, parts, or combinations thereof, and are intended to indicate the presence of one or more other features or numbers, It should be understood that this does not exclude in advance the possibility of the presence or addition of steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms as defined in commonly used dictionaries should be interpreted as having meanings consistent with the meanings they have in the context of the related technology, and unless clearly defined in this specification, should not be interpreted in an idealized or overly formal sense. No.

Hereinafter, the present invention will be described in detail by explaining embodiments of the present invention with reference to the attached drawings. The same reference numerals in each drawing indicate the same member.

Figure 4 is a cross-sectional perspective view of a printer to which a printing paper jam detection and removal device according to an embodiment of the present invention is applied, and Figure 5 is a cross-sectional view of a printer to which a printing paper jam detection and removal device according to an embodiment of the present invention is applied. , Figure 6 is a perspective view of a printing paper jam detection and removal device according to an embodiment of the present invention, and Figure 7 is an exploded perspective view of the printing paper jam detection and removal device of Figure 6.

3 to 10, a device for detecting and removing a printing paper jam in a printer according to an embodiment of the present invention and a printer using the same will be described.

As shown in Figures 3 to 5, the printer 1 to which the printing paper jam detection and removal device according to an embodiment of the present invention is applied may be composed of a printer body and a printer cover. One side of the printer cover may be connected to the printer body by a hinge (not shown), and the other side may be coupled to the printer body by a locking means (not shown). When the locking means of the printer body and the printer cover are released, the upper part of the printer body can be opened by rotating the printer cover with respect to the printer body.

The printer 1 to which the printing paper jam detection and removal device 100 according to an embodiment of the present invention is applied includes a thermal head 10 equipped with a heating element, and a thermal head 10 that engages with the thermal head to rotate and drive the printing paper P. A platen roller 20 that prints predetermined content on the surface of the printing paper according to the printing data supplied to the heating element (not shown) of the thermal head 10 along with the transfer, and a cutting machine that cuts the printed printing paper. It may be configured to include the unit 30 and the driving unit as its main components. The printing paper jam detection and removal device 100 may be installed in the main body of the printer 1.

Referring to Figures 4 and 5, the printer body is formed in the form of a box with an open top, and the printer body includes a printing paper jam detection and removal device 100, a platen roller 20, a paper transfer unit, and a cutting unit. The movable blade of (30), a drive unit (not shown), a control unit (not shown), etc. may be installed. The thermal head 100, the fixing blade of the cutting unit 30, etc. may be installed on the printer cover, which can be opened and closed in a hinged manner on the upper part of the printer body. However, it is not limited to this configuration, and the movable blade may be installed on the printer cover and the fixed blade may be installed on the printer body, the thermal head 10 may be installed on the printer body, and the control unit may be installed on the printer cover. It may be composed of a configuration that is:

4 and 5, in the printer 1 to which the printing paper jam detection and removal device 100 according to an embodiment of the present invention is applied, the printing paper supply roll (R) is rotatably installed on the outside of the printer body. , but is not limited to this. For example, the printing paper supply roll R can be manufactured in various forms as long as it has a structure that can continuously supply printing paper in roll form, such as being installed inside the printer main body.

Printing paper (P) has one side that forms the printing surface on which information is printed, and the other side that is coated with adhesive and forms an adhesive side that is attached to the product. After labels, invoices, etc. are printed by the printing unit, they are cut by the cutting unit. .

The printing unit may be composed of a thermal head 10 and a platen roller 20, and the printing paper P is composed of thermal paper that reacts to heat and can be printed using a thermal recording method using the thermal head 10. For example, printing paper (P) made of thermal paper that reacts to heat is supplied and clamped between the thermal head 10 and the platen roller 20, and is transported forward by the rotational drive of the platen roller 20. At the same time, label or invoice information such as letters, numbers, symbols or shapes can be printed on the surface of the printing paper P by supplying print data to the heating element (not shown) of the thermal head 10.

The printing unit can be configured in various ways depending on the printing method. For example, the printing unit may be composed of a thermal head that converts electrical energy into thermal energy, and generates heat under the control of the control unit. Information can be recorded by heating the printing paper (P) through heat. In addition, the printing unit may use known printing technologies such as inkjet printing or laser printing, and detailed description thereof will be omitted.

The printing paper (P) may be of a linerless type with no release paper on the side to which the adhesive is applied. In contrast, a separate release paper is attached to the upper surface of the adhesive and is cut by the cutting unit 30 to form the release paper. may be removed.

For example, the paper transfer unit prints label or invoice information on one side of the printing paper (P) while transferring the printing paper (P), and moves the printed printing paper (P) to the cutting unit 30 of the printer. It is a component that discharges towards.

As shown in Figures 4 and 5, this paper transfer unit transfers the printing paper (P) under the control of the control unit with the thermal head 10 of the printing unit in close contact with the platen roller 20. While rotating, the printing paper (P) is withdrawn from the paper supply roll (R) rotatably stored in the take-up roller installed on the outside of the printer body and transferred toward the cutting unit (30).

The cutting unit 30 is a component that cuts the printing paper (P) on which printing has been completed by the printing unit. In the printer 1 according to an embodiment of the present invention, the cutting unit 30 may be configured in a guillotine manner in which the movable blade and the fixed blade are separated from each other and the movable blade reciprocates in a straight direction. For example, the fixed blade of the cutting unit 30 is fixed to the cover of the printer 1, and the movable blade of the cutting unit 30 installed in the main body of the printer 1 reciprocates with respect to the fixed blade and is fixed. The blade portion of the blade and the blade portion of the movable blade overlap to cut the printing paper (P) located between the fixed blade and the movable blade.

4 and 5, the fixed blade of the cutting unit 30 is installed on the printer cover and the movable blade of the cutting unit 30 is installed on the printer body. However, the fixed blade is installed on the printer body and The movable blade may be installed on the printer cover. In addition, in the embodiments of FIGS. 4 and 5, the fixed blade and the movable blade are shown as being arranged vertically, but the fixed blade and the movable blade may be arranged horizontally.

Next, with reference to FIGS. 6 and 7, a device 100 for detecting and removing a printing paper jam in a printer according to an embodiment of the present invention will be described.

Printing paper (P) for printing labels or invoices has adhesive applied to the back and label or invoice information is printed on the front. It is a linerless type or has release paper attached to the adhesive-applied back. Any type can be used.

Since adhesive is applied to the back of both linerless type printing paper (P) and release paper type printing paper (P), when the printed printing paper (P) is cut with a cutting unit, the printing paper (P) Since some of the adhesive on the back of the cutting unit is attached to the fixed or movable blade of the cutting unit and accumulates, the leading edge of the printing paper (P) comes into contact with the adhesive accumulation area of the fixed or movable blade, causing the printing paper (P) to get stuck. A phenomenon called paper jam may occur.

Likewise, if a paper jam occurs during the printing operation of the printer, it is necessary to detect it early and remove the paper jam.

The printing paper jam detection and removal device according to an embodiment of the present invention is a device that can detect and remove printing paper jams with a simple configuration. As shown in FIGS. 4 and 5, the printing unit of the printer 1 It is disposed between the platen roller 20 and the cutting unit 30, that is, between the front of the platen roller 20 and the rear of the cutting unit 30.

Referring to FIGS. 6 and 7, the printing paper jam detection and removal device 100 according to an embodiment of the present invention includes a pivot shaft 110 installed at the front lower portion of the platen roller 20, and the central portion of the pivot shaft. A paper jam detection lever 120 coupled to (110) and rotating around the rotation axis, an elastic means 130 that applies force to direct the paper jam detection lever 120 toward the platen roller 20, and printing paper. It may be configured with a detection means 140 that detects a jam.

The paper jam detection lever 120 is equipped with a printing paper guide 121 at the top, which has an outline corresponding to the outline of the outer peripheral surface of the platen roller 20 and is located adjacent to the platen roller 20. The printing paper guide 121 is forced toward the platen roller 20 by an elastic means 130, for example, a compression coil spring. By this elastic means 130, the printing paper guide 121 can be brought into contact with the platen roller 20, and the surface of the printing paper guide 121 facing the platen roller 20 is the platen. It is preferable that the roller 20 is not in complete contact with the roller 20 and is maintained at a certain distance, for example, about 0.01 mm - 0.05 mm. To maintain this gap, a stopper (not shown) may be installed. The gap between the printing paper guide 121 and the platen roller 20 is set to about 0.01 mm or more because if this gap is less than 0.01 mm, foreign substances may penetrate between the printing paper guide and the platen roller. This is to prevent damage to the platen roller due to increased friction between the printing paper guide and the platen roller. In addition, the gap between the printing paper guide 121 and the platen roller 20 is set to about 0.05 mm or less considering that the thickness of the printing paper P is about 0.05 mm under normal operation of the printer. This is to prevent the printing paper (P) from getting caught between the printing paper guide (121) and the platen roller (20).

Meanwhile, the paper jam detection lever 120 is provided with an extension part 122 extending downward at the bottom, and the extension part 122 is disposed opposite to the detection means 140 for detecting a printing paper jam. Some components of the sensing means 140 may be installed on the extension portion 122. When the central portion of the paper jam detection lever 120 is coupled to the rotation shaft 110 and the paper jam detection lever 120 rotates around the rotation shaft 110, the lower portion of the paper jam detection lever 120 extends. The portion 122 moves in the opposite direction to the upper printing paper guide 121. In other words, if a printing paper jam occurs between the cutting unit 30 and the platen roller 20 of the printer 1 and the printing paper P gets stuck between the printing paper guide 121 and the platen roller 20. , the printing paper guide 121 moves forward (to the left in Figure 8), and accordingly, the extension part 122 located on the lower side of the paper jam detection lever 120 moves backward (to the right in Figure 8). I do it. Through this operation, when a printing paper jam occurs in the printer, the extension portion 122 of the paper jam detection lever 120 moves away from the detection means 140, and the detection means 140 detects this and generates a signal. . The printing operation of the printer 1 is stopped or stopped by a signal generated by the sensing means 140, and then the platen roller 20 is rotated in reverse. Reversely rotating the platen roller (20) pulls the printing paper (P) rearward to remove the paper sandwiched between the platen roller (20) and the printing paper guide (121) and moves the cutting unit and the platen roller (20). This is to flatten the printing paper (P) that is crumpled and jammed in between. Accordingly, by detecting a printing paper jam in the printer 1 at an early stage, it is possible to prevent strain on the driving means and easily remove the printing paper jam.

The detection means 140 may be composed of a detection sensor 141 and a sensor detection protrusion 142. As shown in FIG. 7, the sensor detection protrusion 142 may be formed to protrude from the front of the extension part 122 of the paper jam detection lever 120, and the detection sensor 141 may be formed on the cutting unit 30. It may be attached to the main body plate 50 located on the lower side and disposed to face the sensor detection protrusion 142. The detection sensor 141 may be provided with a receiving groove 141a in which the sensor detection protrusion 142 is accommodated.

With this configuration, as shown in FIG. 8, when the printer 1 is in a normal operating state, the sensor detection protrusion 142 of the detection means 140 is within the receiving groove 141a of the detection sensor 141. The detection sensor 141 detects the location and continues to operate the printer 1.

In contrast, as shown in FIG. 9, when a paper jam occurs between the platen roller 20 and the cutting unit 30 due to a printing paper jam, as the platen roller 20 continues to rotate, the printing paper ( As the crumpling of P) progresses, the platen roller 20 and the printing paper guide 121 on the upper side of the paper jam detection lever 120 are pushed forward (left arrow direction in FIG. 9), and the paper jam detection lever 120 ) is rotated counterclockwise around the rotation axis 110. Accordingly, the lower extension portion 122 of the paper jam detection lever 120 moves rearward (to the right in FIG. 9) and moves away from the detection sensor 141 of the detection means 140. As the lower extension part 122 of the paper jam detection lever 120 moves away from the detection sensor 141, the sensor detection protrusion 142 formed on the extension part 122 moves into the receiving groove of the detection sensor 141. It deviates from (141a), and the detection sensor 41 detects this and generates a signal to stop the printing operation of the printer 1.

In addition, as shown in FIG. 10, during the printing process of the printer 1, as the printing paper jam phenomenon progresses, the printing paper P transported forward by the paper transfer unit moves toward the cutting unit 30 and the platen roller. (20), a phenomenon in which the printing paper (P) is rolled up between the printing paper guide 121 of the paper jam detection lever 120 and the platen roller 20 may occur. If this phenomenon worsens, strain may occur in the driving unit of the printer 1, which may cause the printer to malfunction. However, by using the printer paper jam detection and removal device 100 according to an embodiment of the present invention, Printing paper jams in the printer (1) can be detected and removed early.

In addition, according to the apparatus 100 for detecting and removing a printing paper jam in a printer according to an embodiment of the present invention, when a printing paper jam occurs in the printer 1, the printing operation of the printer 1 is stopped and then By rotating the platen roller 20 in reverse, the printing paper (P) can be pulled backwards (in the direction of the paper supply roll (R)) to spread the crumpled printing paper flat. To this end, in the printer's printing paper jam detection and removal device 100 according to an embodiment of the present invention, when a printing paper jam is detected, the printing operation of the printer 1 is stopped, and then the sensor detection protrusion 142 is used. The platen roller 20 can be rotated in reverse until it returns to the receiving groove 141a of the detection sensor 141.

The sensor detection protrusion 142 of the detection means 140 is located in the receiving groove 141a of the detection sensor 141 when the printing paper guide 121 on the upper side of the paper jam detection lever 120 returns to its normal position. This means that the printing paper jam has been resolved. However, if a jam occurs in the printing paper, the crumpling of the printing paper (P) may remain, so it is necessary to pull the printing paper (P) further rearward to flatten the crumpled paper. To this end, in the printing paper jam detection and removal device 100 according to an embodiment of the present invention, when a printing paper jam occurs, the printing paper jam is removed by reversely rotating the platen roller 20 and the sensor detection protrusion 142 ) is returned into the receiving groove 141a of the detection sensor 141, the platen roller 20 can be further reversely rotated for a predetermined time t.

Meanwhile, in the apparatus 100 for detecting and removing a printing paper jam in a printer according to an embodiment of the present invention, the detection means 140 may be formed as a toggle switch (not shown).

In the detection means 140 using a toggle switch, the printer 1 operates normally when the toggle switch is pressed, and the extension part 122 of the paper jam detection lever 120 When (122) moves away from the toggle switch, the printing operation of the printer (1) can be controlled by stopping the printing operation of the printer (1).

In addition, in the printer's printing paper jam detection and removal device 100 according to an embodiment of the present invention, the printing paper guide 121 of the paper jam detection lever 120 is connected to the platen roller 20 and the cutting device. It may be arranged across the space between units 30. As a result, the leading edge of the printing paper (P) cut by the cutting unit (30) contacts the platen roller (20), thereby preventing the printing paper (P) from being rolled up toward the platen roller (20).

When printing using linerless type printing paper (P) in the printer (1) to which the printing paper jam detection and removal device (100) according to an embodiment of the present invention is applied, the back of the printing paper (P) In order to prevent the applied adhesive from sticking to the upper surface of the printing paper guide 121 of the paper jam detection lever 120, a peelable material is used on the upper surface of the printing paper guide 121 to ensure non-adhesiveness, or The surface can be treated to make it peelable (non-adhesive). For example, a silicone rubber layer can be formed on the upper surface of the printing paper guide 121. Additionally, as shown in FIG. 7, a plurality of protrusions extending in the paper transport direction and spaced apart from each other may be formed on the upper surface of the printing paper guide 121.

In the above description of the printing paper jam detection and removal device 100 according to an embodiment of the present invention, for example, adhesive is applied to the back of the printing paper (P) and there is no release paper on the adhesive-coated side. An example is given of printing labels, invoices, etc. using a label printer using linerless type printing paper (P) or a type of printing paper (P) with a separate release paper attached to the adhesive-coated side. did. However, the printing paper jam detection and removal device 100 according to an embodiment of the present invention can naturally be applied to the receipt printer 1 that uses continuous paper to print receipts (not shown). Detailed description is omitted.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely illustrative, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. will be. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the attached patent claims.

1: Printer 10: Thermal head
20: Platen roller 30: Cutting unit
50: Body plate 100: Printing paper jam detection and removal device
110: Rotating axis 120: Paper jam detection lever
121: Printing paper guide 122: Extension part
130: elastic means 140: sensing means
141: detection sensor 141a: receiving groove
142: Sensor detection protrusion P: Printing paper
R: Printing paper supply roll

Claims (10)

The thermal head 10, which includes a heating element, engages with the thermal head and transports the printing paper P by rotational drive, and creates predetermined content on the surface of the printing paper according to the print data supplied to the heating element of the thermal head. A printing paper jam detection and removal device (100) in a printer (1) including a platen roller (20) for printing, a cutting unit (30) for cutting printed printing paper, and a driving unit,
It is disposed between the platen roller 20 and the cutting unit 30,
A rotation shaft 110 installed at the front lower end of the platen roller 20;
The central part is coupled to the rotation axis 110, and the upper portion has a printing paper guide 121 that has an outline corresponding to the outline of the outer peripheral surface of the platen roller 20 and is located adjacent to the platen roller 20. A paper jam detection lever 120 that is provided and has an extension portion 122 extending downward at the lower portion;
Elastic means 130 that applies force to direct the printing paper guide 121 of the paper jam detection lever 120 toward the platen roller 20; and
It includes a detection means (140) for detecting a printing paper jam between the platen roller (20) and the cutting unit (30),
The gap (G) between the printing paper guide 121 of the paper jam detection lever 120 and the platen roller 20 is caused by the force applied by the elastic means 130 to the paper jam detection lever 120. remains in the range of 0.01mm - 0.05mm,
When a printing paper jam occurs between the platen roller 20 and the cutting unit 30, the detection means 140 causes the paper jam detection lever 120 to rotate around the rotation axis 110. Characterized in detecting this and generating a signal to stop the printing operation of the printer (1).
A device for detecting and removing print paper jams in printers.
According to paragraph 1,
The detection means 140 includes a sensor detection protrusion 142 protruding from the front of the extension part 122 of the paper jam detection lever 120 and a receiving groove 141a in which the sensor detection protrusion 142 is accommodated. And characterized in that it consists of a detection sensor 141 disposed in front of the sensor detection protrusion.
A device for detecting and removing print paper jams in printers.
According to paragraph 2,
When the sensor detection protrusion 142 of the detection means 140 detects that it is located in the receiving groove 141a of the detection sensor 141, the printer 1 is operated normally, and the sensor of the detection means 140 detects When detecting that the protrusion 142 deviates from the receiving groove 141a of the detection sensor 141, a signal is generated to stop the printing operation of the printer 1.
A device for detecting and removing print paper jams in printers.
According to paragraph 3,
When the sensor detection protrusion 142 of the detection means 140 detects that it has deviated from the receiving groove 141a of the detection sensor 141, a signal is generated to stop the printing operation of the printer 1, and then the printing operation of the printer 1 is stopped. Characterized in that the platen roller 20 is reversely rotated until the sensor detection protrusion 142 returns into the receiving groove 141a of the detection sensor 141.
A device for detecting and removing print paper jams in printers.
According to clause 4,
Characterized in that the platen roller 20 is further reversely rotated for a predetermined time t after the sensor detection protrusion 142 returns into the receiving groove 141a of the detection sensor 141.
A device for detecting and removing print paper jams in printers.
According to paragraph 1,
The sensing means 140 consists of a toggle switch,
When the extension part 122 of the paper jam detection lever 120 is pressing the toggle switch, the printer 1 operates normally, and the extension part 122 of the paper jam detection lever 120 moves away from the toggle switch. Characterized by stopping the printing operation of the printer (1) when
A device for detecting and removing print paper jams in printers.
delete According to paragraph 1,
The printing paper guide 121 of the paper jam detection lever 120 is disposed across the space between the platen roller 20 and the cutting unit 30, and thereby controls the printing paper cut in the cutting unit 30. Characterized in that it prevents the tip of (P) from contacting the platen roller (20).
A device for detecting and removing print paper jams in printers.
According to clause 8,
Characterized in that a silicone rubber layer is formed on the upper surface (121a) of the printing paper guide 121 of the paper jam detection lever 120.
A device for detecting and removing print paper jams in printers.
A printer using the printing paper jam detection and removal device according to any one of claims 1 to 6, 8, and 9.

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