JP3016362U - Paper jam clearing mechanism in printer - Google Patents

Abstract

(57) [Summary] [Purpose] Paper jams can be easily cleared by simple operations, and the structure is simple, the number of parts is small, and the manufacturing cost is low. A sheet feed roller 2, a sheet feed roller 3 and a carriage 4 are arranged in a casing 1 along a sheet feed direction A at a predetermined interval, and a sheet feed tray 6 can come into contact with and separate from the sheet feed roller 2. The paper pressing roller 8 is pressed against the paper feed roller 3 so that the paper pressing roller 8 can come into contact with and separate from the paper feeding roller 3 to release the paper feed tray 6 and the paper pressing roller 8 to a predetermined separated position against the pressing force. Lever 21
Is connected to the opening / closing lid 14 provided in the carriage replacement opening 14 of the casing 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a paper jam clearing mechanism for clearing a paper jam in a printer such as an inkjet system or a thermal transfer system or a printing device such as a fax machine.

[0002]

[Prior art]

 As an example of a printing device, a paper feed roller, a paper feed roller, and a carriage are arranged at a predetermined interval along the paper feed direction, and a paper feed tray is pressed against the paper feed roller so that the paper feed tray can come into contact with and separate from the paper feed tray. A paper pressing roller is pressed against the paper feed roller so that it can come into contact with and separate from the paper feed roller. By rotating the paper feed roller and the paper feed roller, the paper is fed from the paper feed tray and the carriage is fed. There is a printer that prints on the paper by a reciprocating movement in a direction orthogonal to the direction by a printing unit provided on the carriage.

Conventionally, the above-mentioned printing apparatus is provided with a tray pressing release lever as a paper jam releasing mechanism. When a paper jam occurs during printing, the lever is operated to move the paper feed tray to the paper feed roller. The paper is forcibly pulled out by pulling the jammed paper away from.

[0004]

[Problems to be solved by the device]

 In the above conventional configuration, when the jammed paper is forcibly pulled out, the portion of the paper sandwiched by the paper feed roller and the press roller is broken, and the broken paper piece remains in the printing device. However, there is a problem that it takes time to take out the remaining pieces of paper.

Therefore, it is conceivable to provide a roller pressing release lever that separates the pressing roller from the paper feeding roller, but in this case, the printing apparatus is provided with two pressing release levers for the paper feed tray and the pressing roller. In addition, the operation is troublesome, and the structure is complicated, the number of parts is large, and the manufacturing cost is high.

In view of the above-mentioned conventional problems, the present invention is capable of easily clearing paper jams by a simple operation, has a simple structure, has a small number of parts, and can reduce manufacturing costs. It is an object of the present invention to provide a paper jam clearing mechanism in.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the invention according to claim 1 is such that a paper feed roller, a paper feed roller and a carriage are arranged at a predetermined interval in a casing in a paper feed direction, and the paper feed roller is fed. The tray is pressed so that it can come into contact with and separate from it, and the paper pressing roller is pressed against the paper feed roller so that it can come into contact with and separate from it.By rotating the paper feed roller and paper feed roller, In a printing device configured to print the paper by a printing unit provided in the carriage by feeding the paper out of the tray and reciprocally moving the carriage in a direction orthogonal to the paper feeding direction, It is characterized in that a pressing release lever is provided for retracting the paper feeding tray and the paper pressing roller to a predetermined separated position against the pressing force.

According to a second aspect of the present invention, in the device according to the first aspect, the pressing release lever is connected to an opening / closing lid that is openably / closably provided at an opening for exchanging a printing portion of the casing, and the opening / closing is performed. It is characterized in that by opening the lid, the paper feed tray and the paper pressing roller are retracted to a predetermined separated position via the pressing release lever.

According to a third aspect of the present invention, the invention according to the second aspect is characterized in that a connecting point connecting the pressing release lever and the opening / closing lid is close to a pivot shaft of the opening / closing lid. I will.

According to a fourth aspect of the present invention, the opening / closing lid is opened when a connecting point connecting the pressing release lever and the opening / closing lid exceeds the vertical line passing through the pivot shaft when the opening / closing lid is opened. It is characterized in that it is configured to move to the side.

[0011]

[Action]

 The device according to claim 1, wherein the paper is set in the paper feed tray, and the paper feed roller and the paper feed roller are rotationally driven to feed the paper from the paper feed tray, and the carriage is orthogonal to the paper feed direction. The paper can be printed on the paper by a reciprocating movement in the direction of the arrow and a printing unit provided on the carriage.

If a paper jam occurs during the printing, the pressing release lever may be operated. As a result, the paper feed tray is separated from the paper feed roller, and the pressing roller is separated from the paper feed roller. Therefore, the jammed paper can be easily pulled out to clear the paper jam.

In this case, it is possible to easily clear the paper jam by retracting the paper feed tray and the pressing roller to a predetermined separated position by operating only one pressing release lever, and the structure is simple. The number of points is small and the production cost can be reduced.

According to the second aspect of the present invention, the pressing release lever is connected to the opening / closing lid that is openably / closably provided in the opening for exchanging the printing portion of the casing, and by simply opening the opening / closing lid, Since the paper feed tray and the paper pressing roller can be retracted to a predetermined separated position via the pressing release lever, the troublesome operation of opening the opening / closing lid and operating the pressing release lever is unnecessary. And is excellent in operability.

According to the third aspect of the present invention, since the connecting point connecting the pressing release lever and the opening / closing lid is close to the pivot shaft of the opening / closing lid, the pressing release lever is attached to the opening / closing lid. Despite being connected, the lever can easily open the lid with a small force.

According to the fourth aspect of the present invention, the connecting point connecting the pressing release lever and the opening / closing lid is in an opened state beyond the vertical line passing through the pivot when the opening / closing lid is opened. Since it is configured to move to the side of the opening / closing lid, there is no risk of the opened opening / closing lid being unexpectedly closed, and the work of pulling out jammed paper can be performed without any problems.

[0017]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an ink jet type printing apparatus according to an embodiment of the present invention, in which a paper feed roller 2, a paper feed roller 3, a carriage 4 and a carriage 4 are provided in a casing 1 along a paper feed direction A. Discharge rollers 5 are arranged at predetermined intervals, a paper feed tray 6 is pressed against the paper feed roller 2 by a spring 7 so that the paper feed tray 6 can come into contact with and separate from the paper feed roller 2, and a paper pressing roller 8 is fixed above the paper feed roller 3. The paper pressing roller 8 is arranged to be movable up and down within the range, and is pressed against the paper feeding roller 3 by a spring 9 so as to be able to come into contact with and separate from the paper feeding roller 3, and the pressing roller 10 is pressed to the paper discharging roller 5. In FIG. 1, 13 is a paper guide plate.

In the above structure, after the paper P is set in the paper feed tray 6, the paper feed roller 2, the paper feed roller 3 and the paper discharge roller 5 are rotationally driven to feed the paper P from the paper feed tray 6. The fed paper P passes between the paper feed roller 3 and the paper pressing roller 8 and between the paper discharge roller 5 and the pressing roller 10, and the carriage 4 is driven by the drive device ( By reciprocating along a guide rail 11 in a direction orthogonal to the paper feed direction A by means of a not-shown), printing is performed on the paper P by the ink jet printing unit 12 provided in the carriage 4. .

A cross-section in which a base end portion of the opening / closing lid 14 is integrally formed at one side edge of the opening 15 is formed in the top plate portion of the casing 1 with an opening / closing lid 14 with an opening / closing lid 14. The bracket 17 of the substantially L-shaped support frame 16 is pivotally supported via a pivot shaft 18, and its tip end is brought into contact with a receiving plate portion 19 formed integrally with the other side edge of the opening portion 15, It is configured so as to be openable and closable around the pivot shaft 18, and as shown in FIGS. 3 and 4, the print unit 12 is replaced through the opening 15 opened by rotating the open / close lid 14 upward. You can

A pair of left and right pressing release levers 21 each having a substantially lateral T-shape are provided in the casing 1, and each pressing release lever 21 has a long hole 22 formed in a downward projecting portion 21 a of the sheet pressing roller 8. The support shaft 8a is fitted so as to be movable within a certain range, its lateral protrusion 21b faces the paper feed tray 6, and its upper protrusion 21c is connected to the opening / closing lid 14 by a connecting pin (connection point). It is rotatably connected to the sheet pressing roller 8 via the lower protrusion 21a by pulling the upper protrusion 21c obliquely upward from the state shown in FIGS. And the side protrusion 21b is pressed against the paper feed tray 6 to separate the paper feed tray 6 from the paper feed roller 2 against the spring 7. be able to ( (See FIGS. 3 and 4).

In the above configuration, if the paper P is jammed during printing shown in FIGS. 1 and 2, the opening / closing lid 14 is rotated upward. As a result, as shown in FIGS. 3 and 4, the pressing release lever 21 is pulled obliquely upward, the paper pressing roller 8 is separated from the paper feeding roller 3, and the paper feeding tray 6 is fed. Since the paper P is separated from the roller 2, the jammed paper P can be easily pulled out to clear the paper jam. Further, after clearing the paper jam, the printable state shown in FIGS. 1 and 2 can be restored only by closing the opening / closing lid 14.

In this case, by operating only one pressing release lever 21, the paper feed tray 6 and the paper pressing roller 8 can be retracted to a predetermined separation position to easily clear the paper jam, and the structure is It is simple, has a small number of parts, and can be manufactured at low cost.

Further, simply by opening the opening / closing lid 14, the paper feeding tray 6 and the paper pressing roller 8 can be retracted to a predetermined separated position via the pressing release lever 21, and the opening / closing lid 14 is opened. In addition, the troublesome operation of operating the pressing release lever 21 is unnecessary, and the operability is excellent.

Further, as shown in FIG. 1, the distance α between the pivot shaft 18 and the connecting pin 23 is set to be small, and the connecting pin 23 is close to the pivot shaft 18. Even though the pressing release lever 21 is connected to the lever 14, the opening / closing lid 14 can be easily opened with a small force by the lever principle.

Furthermore, when the opening / closing lid 14 is opened from the state shown in FIG. 1, the connecting pin 23 moves beyond the vertical line O passing through the pivot shaft 18 to the opening / closing lid 14 side in the opened state. Since it is formed (see FIG. 3), there is no possibility that the openable lid 14 will be closed unexpectedly, and the jammed paper P can be pulled out without any trouble.

[0026]

[Effect of device]

 According to the invention of claim 1, the paper jam can be easily cleared by retracting the paper feed roller and the pressing roller to a predetermined separated position by simply operating one pressing release lever. It is simple, has a small number of parts, and can be manufactured at low cost.

According to the second aspect of the present invention, the paper feed tray and the paper pressing roller can be retracted to the predetermined separated position via the pressing release lever only by opening the open / close lid. It is excellent in operability because it does not require a troublesome operation of opening the lever and operating the pressing release lever.

According to the third aspect of the present invention, although the pressing release lever is connected to the opening / closing lid, the connecting point is close to the pivot shaft of the opening / closing lid. Therefore, the opening / closing lid can be easily opened with a small force.

According to the invention as set forth in claim 4, there is no possibility that the opened lid will be closed unexpectedly, and the pulling operation of the jammed paper can be performed without any trouble.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a printer with a paper jam clearing mechanism according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the same.

FIG. 3 is a transverse cross-sectional view of the paper jam clearing state.

FIG. 4 is a vertical cross-sectional view of the same state.

[Explanation of symbols]

 1 Casing 2 Paper Feeding Roller 3 Paper Feeding Roller 4 Carriage 6 Paper Feeding Tray 12 Printing Section 14 Opening / Closing Lid 15 Carriage Replacement Aperture 18 Pivot Shaft 21 Push Release Lever 23 Connecting Pin (Connecting Point) A Paper Feeding Direction O Vertical Line P paper

Claims (4)

[Scope of utility model registration request] 1. A paper feed roller, a paper feed roller, and a carriage are arranged at a predetermined interval in a casing along a paper feed direction, and a paper feed tray is pressed against the paper feed roller so as to come into contact with and separate from the paper feed tray. A paper pressing roller is pressed against the paper feeding roller so that the paper pressing roller can come into contact with and separate from the paper feeding roller, and by rotating the paper feeding roller and the paper feeding roller,
In the printing device, the paper is fed from the paper feed tray and the carriage is reciprocated in a direction orthogonal to the paper feed direction so that the printing unit provided in the carriage prints on the paper. A paper jam clearing mechanism in a printing apparatus, comprising a pressing release lever that retracts the tray and the paper pressing roller to a predetermined separated position against the pressing force. 2. The pressing release lever is connected to an opening / closing lid that is openably and closably provided in the printing portion replacement opening of the casing, and by opening the opening / closing lid, the feeding release lever is connected via the pressing release lever. The paper jam clearing mechanism in the printing apparatus according to claim 1, wherein the paper tray and the paper pressing roller are configured to be retracted to a predetermined separated position. 3. The paper jam releasing mechanism in the printing apparatus according to claim 2, wherein a connecting point connecting the pressing release lever and the opening / closing lid is close to a pivot shaft of the opening / closing lid. 4. The connecting point for connecting the pressing release lever and the opening / closing lid is configured to move toward the opening / closing lid side in an opened state, when the opening / closing lid is opened, beyond a vertical line passing through a pivot shaft thereof. The paper jam clearing mechanism in the printing apparatus according to claim 3, wherein the paper jam clearing mechanism is configured.