JP2005219900A - Paper feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a recording paper roll unit from being loaded and taken out when a set lever is at a wrong position. <P>SOLUTION: In a paper feeding device, the set lever 19 comprises a set lever body 19a and a knob section 19b, and is formed nearly in an L shape by the set lever body 19a and the knob section 19b. One end of the set lever body 19a is rotatably mounted to a shaft 42 provided on a guide plate 32, and the knob section 19b is extended nearly vertically to the set lever body 19a at the other end. A projection 43 projecting toward the end face of the recording paper roll unit 13 is provided at the knob section 19b. The projection 43 is positioned at the upper portion of the top section of a gear 39, when the set lever 19 is moved to a set position after the recording paper roll unit 13 is accommodated in a case body 21. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a paper feeding device, and more particularly to a paper feeding device that stores roll-shaped recording paper such as thermal recording paper and photographic paper in a replaceable manner.

  Patent Document 1 proposes a paper feeding device used for a printer or the like. This paper feeding device accommodates a recording paper roll unit comprising a recording paper roll in which a long recording paper is wound around a winding core and roll holders attached to both ends of the roll and having rotating shafts. The recording paper is fed into the printer, and comprises a case main body and a lid for housing the recording paper roll unit. A paper feed roller is incorporated in the case body. The paper feed roller is driven and rotated from the printer side, and feeds the recording paper from the paper feed device into the printer. Further, the case body is provided with a plurality of pressing rollers and a leading edge separating plate for separating the leading edge of the recording paper from the outer peripheral surface of the recording paper roll in order to ensure the feeding of the recording paper. As described above, the recording paper feeding mechanism for reliably feeding the recording paper into the printer is configured by the paper feed roller, the pressing roller, the leading edge separation plate, and the like.

  After the recording paper roll unit is loaded in the case body, the recording paper feeding mechanism is moved so that each of the recording paper feeding mechanisms comes into contact with the outer circumference of the recording paper by operating a set lever connected to the recording paper feeding mechanism. The set lever moves between a set position where the recording paper feed mechanism is pressed against the outer periphery of the recording paper roll and a set release position where the recording paper feed mechanism moves to a retracted position away from the recording paper roll. To do. That is, loading and unloading of the recording paper roll loaded in the case body is performed after the set lever is moved to the set release position.

JP 2003-246509 A

  However, in the above-described paper feeding device, when taking out the recording paper roll unit from the case main body, if the set lever is attempted to be taken out without moving from the setting position to the setting releasing position, the recording paper roll unit is moved to the recording paper feeding mechanism. There is a problem in that not only the recording paper feed mechanism but also the components connected to these and the components installed in the paper feeder are damaged. In addition, even if the recording paper roll unit is accidentally loaded into the case body even though the set lever is in the set position, there is still a problem that various components inside the paper feeding device are damaged. .

  SUMMARY An advantage of some aspects of the invention is to provide a paper feeding device that can prevent loading and unloading of a recording paper roll unit when a set lever is in an incorrect position. .

  In order to achieve the above object, a paper feeding device according to the present invention includes a recording paper roll in which a long recording paper is wound in a roll shape around a winding core, a roll holder attached to both ends of the roll, and provided with a rotation shaft. A recording paper roll unit that is detachably loaded, and a roll storage chamber that rotatably supports the recording paper roll unit when loaded, and a leading edge separation plate that separates the leading edge of the recording paper from the outer peripheral surface of the recording paper roll A recording paper feed mechanism provided movably between a contact position where the tip separation plate contacts the outer peripheral surface and a retracted position away from the outer peripheral surface, and in conjunction with the recording paper feed mechanism, A set lever provided movably between a set position for setting the recording paper feed mechanism to the contact position and a set release position for moving to the retracted position; When the set lever is in the set position, the recording paper roll unit enters the loading path of the recording paper roll unit. When the recording paper roll unit is already loaded, it is removed, and when it is not loaded, the loading is performed. An erroneous operation blocking member for blocking is provided on the set lever.

  Further, it is preferable that the erroneous operation prevention member prevents an erroneous operation due to interference with the roll holder.

  When the set lever is at the set position, the paper feeding device of the present invention enters the recording paper roll unit loading path, and if the recording paper roll unit is already loaded, it is removed. Since the operation lever for preventing the loading is provided on the set lever, it is possible to prevent the components installed in the sheet feeding apparatus from being damaged when the recording paper roll unit is taken out or loaded. In particular, it is possible to prevent breakage of the leading end separation plate constituting the recording paper feed mechanism.

  The paper feeder according to the present invention will be described as a paper feed magazine. The paper feed magazine is used by being set in the magazine loading chamber of the printer. The paper feed magazine has a paper feed function that feeds recording paper into the printer when driving is transmitted from the printer side, and a function that improves light shielding and airtightness to protect the stored recording paper. .

  As shown in FIGS. 1 and 2, the paper feed magazine 10 has a rectangular parallelepiped shape, and includes a recording paper roll unit 13, a paper feed roller 14, a separation unit 15, which are housed in the magazine 10. It comprises a guide member 16, a recording paper feed mechanism 17, a roller moving mechanism 18, a set lever 19, and the like.

  The recording paper roll unit 13 includes a recording paper roll 20 and roll holders 21 and 22 to be replaced. The recording paper roll 20 has a configuration in which a recording paper 24 is wound around a winding core 23 having a hollow cylindrical section.

  The roll holders 21 and 22 are detachably attached to both sides of the winding core 23. The roll holders 21 and 22 are provided with drum portions 25 and 26 that are respectively inserted into openings on both side ends of the winding core 23. The drum portions 25 and 26 are integrally formed with disc-shaped flanges 25a and 26a, respectively. The drum portions 25 and 26 are provided with shafts 27 and 28 protruding outward. The shaft 27 is provided with a gear 29 to which driving from the printer side is transmitted.

  The drum portions 25 and 26 are in contact with the inner periphery of the winding core 23 and support the winding core 23. Both ends of the recording paper roll 20 are sandwiched between the flanges 25a and 26a, and the recording paper roll 20 is held at a predetermined position. The shafts 27 and 28 support the drum portions 25 and 26, and portions protruding from the drum portions 25 and 26 are supported by a bearing portion 33 described later.

  The drum portions 25 and 26 have built-in one-way clutches. The one-way clutch cuts off the drive transmission between the shafts 27 and 28 and the drum portions 25 and 26 when rotating the recording paper roll 20 in the feed-out direction, and rotates the shaft 27 when rotating the recording paper 24 in the take-up direction. , 28 and the drum sections 25, 26. As a result, when feeding paper, the shafts 27 and 28 and the drum portions 25 and 26 are free, and the recording paper roll 20 is rotated only in the feeding direction by the paper feed roller 14. At the time of winding, the drive from the printer side is transmitted to the gear 29 provided on the shaft 27 of one roll holder 21 to rotate the recording paper roll 20 in the winding direction.

  The paper feed magazine 10 includes a lid 30 and a case main body (roll storage chamber) 31. A pair of guide plates 32 are attached to the case body 31 with a predetermined distance therebetween. The pair of guide plates 32 are each provided with a U-shaped bearing portion 33 on an opposing surface. The bearing portion 33 is in a posture with the open side facing up. Inserted into the pair of bearing portions 33 are shafts 27 and 28 that protrude from both ends of the recording paper roll unit 13. As a result, the recording paper roll unit 13 is accommodated between the pair of guide plates 32. The recording paper roll unit 13 has a recording paper roll 20.

  The lid 30 is attached to the case body 31 via a hinge 35 so as to be opened and closed, and covers the opening of the case body 31. The lid 30 is provided with a packing for making the inside airtight at a portion joined to the opening of the case main body 31.

  The recording paper feed mechanism 17 is for reliably feeding the recording paper 24 into the printer, and includes a paper feed roller 14, first and second pressing rollers 36 and 37, and a separation unit 15. The paper feed roller 14 is for rotating the recording paper roll 20 in the feed-out direction, and is provided so as to be movable between a contact position that contacts the outer periphery of the recording paper roll 20 and a retreat position that leaves the recording paper roll 20. , It moves in conjunction with the operation of the set lever 19. The paper feed roller 14 is urged toward the center of the recording paper roll 20 by a spring (not shown). When in the contact position, the outer periphery of the recording paper roll 20 follows the change in the roll diameter of the recording paper roll 20. Move to touch. A driving force is transmitted to the paper feed roller 14 from the printer side via a transmission mechanism (not shown). A one-way clutch is arranged in the drive system for the paper feed roller 14 on the printer side, and the drive force is transmitted to the paper feed roller 14 at the time of paper feed, and the drive transmission is canceled at the time of winding to feed the paper feed roller. Make 14 free.

  The first and second pressing rollers 36 and 37 are provided so as to be in pressure contact with both sides of the outer periphery of the recording paper roll 20 across the position where the paper feed roller 14 contacts. The rollers 36 and 37 are provided so as to move between a contact position that contacts the outer periphery of the recording paper roll 20 and a retracted position away from the contact position, and move in conjunction with the operation of the set lever 19. Further, the first and second pressing rollers 36 and 37 are biased toward the center of the recording paper roll 20 by a spring (not shown), and follow the change in the roll diameter of the recording paper roll 20 when in the contact position. Then, the recording paper roll 20 moves so as to be in contact with the outer periphery.

  The separation unit 15 includes a separation plate 38 and a separation plate positioning roller 39. The separation plate 38 is used for separating the recording paper roll 20 from the outer peripheral surface of the recording paper roll 20 with the leading end thereof being rolled. The recording paper roll 20 is provided so as to be movable between a contact position that contacts the outer periphery of the recording paper roll 20 and a retreat position that retreats from the contact position.

  The separation plate positioning roller 39 is for positioning the tip of the separation plate 38 at the contact position. The separation plate positioning roller 39 is provided so as to move together with the separation plate 38 at a predetermined distance in the recording paper feed direction from the position where the separation plate 38 abuts on the outer periphery of the recording paper roll 20. The leading end of the separation plate 38 is positioned at the contact position when it contacts the recording paper roll 20. Further, the separation plate positioning roller 39 is movably provided between a contact position that contacts the outer periphery of the recording paper roll 20 and a retracted position that is separated from the contact position, and moves in conjunction with the operation of the set lever 19. . Further, the separation plate positioning roller 39 is urged toward the center of the recording paper roll 20 by a spring (not shown). When in the contact position, the separation sheet positioning roller 39 follows the change in the roll diameter of the recording paper roll 20. It moves so as to contact the outer periphery of the roll 20. The separation plate 38 is connected to the separation plate positioning roller 39 and is displaced in conjunction with the movement of the separation plate positioning roller 39.

  The roller moving mechanism 18 moves the paper feed roller 14 in conjunction with the operation of the set lever 19 provided in the case body 31, and the first and second pressing rollers 36 and 37 in conjunction with the operation of the set lever 19. Also move. Further, the separation unit 15 is also moved together. The set lever 19 is exposed by opening the lid 30, and moves the paper feed roller 14, the first and second pressing rollers 36 and 37, and the separation unit 15 to the contact position, and sets the paper feedable state. It is operated between two positions: a set position (see FIG. 3) and a set release position (see FIG. 4) for moving these to the retracted position. When taking out the recording paper roll 20, the set lever 19 is operated to the set release position, and the respective rollers 14, 36, 37 are retracted to the retracted positions and then taken out. As a method for moving the recording paper feeding mechanism 17 in conjunction with the operation of the set lever 19, the roller moving mechanism 18 is described in, for example, Japanese Patent Application Laid-Open No. 2003-246509. A known method such as a method of connecting the set lever 19 and the set lever 19 by a link mechanism can be applied.

  At the bottom of the case main body 31, a delivery port 40 serving as an entrance for the recording paper 24 is formed. A shielding lid 41 is attached to the delivery port 40. The shielding lid 41 opens and closes between a shielding position that shields the outlet 40 and an open position, and is normally biased toward the shielding position by a spring (not shown). The shielding lid 41 is pressed when the paper is fed by the driving member on the printer side and moves to the open position.

  The guide member 16 guides the leading end of the recording paper 24 separated by the separation plate 38 toward the delivery port 40.

  As shown in FIG. 3, the set lever 19 is formed in a substantially L shape, and includes a set lever main body 19a and a knob portion 19b gripped by an operator. One end of the set lever body 19a is rotatably attached to a shaft 42 provided on the guide plate 32, and a knob portion 19b is extended to the other end substantially perpendicular to the set lever body 19a. . The knob portion 19 b is provided with a protrusion (erroneous operation prevention member) 43 that protrudes toward the end surface of the recording paper roll unit 13. The protrusion 43 is positioned above the top of the gear 29 of the loaded recording paper roll unit 13 when the set lever 19 is in the set position.

  As shown in FIG. 4, the set lever 19 is located outside the range A through which the gear 29 of the recording paper roll unit 13 passes when the recording paper roll unit 13 is loaded or unloaded. It is assembled to the guide plate 32 so as to rotate about the shaft 42 to the position. As described above, the set lever 19 is movable between the set position and the set release position. When the recording paper roll unit 13 is set in the paper feed magazine 10, the recording paper roll unit 13 can be taken out by moving the set lever 19 from the set position to the set release position.

  Next, the operation of the above configuration will be described. When the recording paper roll unit 13 is assembled, the drum portions 25 and 26 of the roll holders 21 and 22 are inserted into the openings at both ends of the winding core 23. After the insertion, the roll holders 21 and 22 are set in the paper feed magazine 10 with the shafts 27 and 28.

  In setting the recording paper roll unit 13 in the paper feed magazine 10, first, the lid 30 of the paper feed magazine 10 is opened, and the set lever 19 is operated to the set release position as shown in FIG. Then, both shafts 27 and 28 of the recording paper roll unit 13 are inserted into the bearing portion 33. After insertion, the set lever 19 is operated to the set position. As a result, the recording paper feed mechanism 17 located at the retracted position moves to the contact position. Further, the projection 43 of the set lever 19 is located above the top of the gear 29 of the recording paper roll unit 13. Thereafter, the operation of loading the recording paper roll unit 13 into the paper supply magazine 10 is completed by closing the lid 30.

  When taking out the recording paper roll unit 13 set in the paper feed magazine 10 from the paper feed magazine 10, first the lid 30 of the paper feed magazine 10 is opened, and the set lever 19 is moved to the set release position as shown in FIG. To operate. As a result, the recording paper feed mechanism 17 located at the contact position moves to the retracted position. Further, the protrusion 43 of the set lever 19 retracts outside the path through which the gear 29 passes when the recording paper roll unit 13 is taken out, that is, outside the range A shown in FIG. After this state is reached, the recording paper roll unit 13 is taken out from the paper feed magazine 10.

  When the recording paper feed mechanism 17 is in the contact position and the recording paper roll unit 13 accommodated in the paper feed magazine 10 is to be taken out, the projection 43 and the gear 29 interfere with each other, so the recording paper roll unit 13 Can not be taken out. That is, when the recording paper roll unit 13 is taken out, as shown in FIG. 3, when the set lever 19 is in an incorrect position, that is, in the setting position, the projection 43 of the set lever 19 causes the recording paper roll unit 13 to move. Since the recording paper roll unit 13 has entered the path through which the gear 29 passes, the projection 43 of the set lever 19 interferes with the gear 29 of the recording paper roll unit 13 and the recording paper roll unit 13 is removed. To prevent.

  As a result, if the user forgets to operate the set lever 19 to the set release position when taking out the recording paper roll unit 13 from the paper feeding magazine 10, the recording paper roll unit 13 cannot be taken out from the paper feeding magazine 10. It is possible to prevent damage to the paper feed mechanism 17, components connected to the recording paper feed mechanism 17, and components installed in the paper feed magazine 10.

  As shown in FIG. 6, when the recording paper roll unit 13 is to be loaded into the paper feed magazine 10 when the recording paper feed mechanism 17 is in the contact position, it is set with the gear 29 of the recording paper roll unit 13. The recording paper roll unit 13 cannot be loaded into the paper feed magazine 10 because the projection 43 of the lever 19 interferes. That is, when the recording paper roll unit 13 is loaded into the paper feed magazine 10, if the set lever 19 is in an incorrect position, that is, the setting position, the protrusion 43 of the set lever 10 feeds the recording paper roll unit 13. Since the recording paper roll unit 13 enters the path through which the gear 29 passes when the paper magazine 10 is loaded, the projection 43 of the set lever 19 becomes an obstacle, and the recording paper roll unit 13 enters the paper feeding magazine 10. To prevent loading.

  As a result, if the user forgets to operate the set lever 19 to the set release position when loading the recording paper roll unit 13 into the paper feed magazine 10, the recording paper roll unit 13 cannot be loaded into the paper feed magazine 10. Further, it is possible to prevent damage to the recording paper feeding mechanism 17, the components connected to the recording paper feeding mechanism 17, and the components installed in the paper feed magazine 10.

  In the above embodiment, the projection lever 43 is provided on the knob portion 19b using the set lever 19 formed in a substantially L shape, and this projection 43 is caused to interfere with the gear 29 of the recording paper roll unit 13. The form of the set lever 19 is not limited to this. For example, as shown in FIG. 7, the set lever main body 50a formed by bending, the knob portion 50b, and the set lever main body 50a are directed inward from the middle. Alternatively, the set lever 50 may be constituted by the protruding portion 50c protruding vertically. One end of the set lever body 50a is rotatably attached to a shaft 51 provided on the guide plate 32, and a knob portion 50b is provided at the other end. As shown in FIG. 7, when the set lever 50 is operated to the set position, the protrusion 50 c is located above the top of the shaft 27.

  Further, as shown in FIG. 8, the set lever 50 is set outside the range B through which the shaft 27 of the recording paper roll unit 13 passes when the recording paper roll unit 13 is loaded or unloaded. It is provided so as to rotate about the shaft 51 to the release position. The recording paper roll unit 13 can be taken out by rotating the set lever 50 from the set position to the set release position.

  In this way, by causing the protrusion 50c to interfere with the shaft 27, the loading and unloading of the recording paper roll unit 13 can be regulated in the same manner as in the above embodiment. Further, in addition to the shaft 27, the protrusion 50c may be configured to interfere with a part of the recording paper roll unit 13, and the portion with which the protrusion 50c is engaged can be changed as appropriate.

It is a schematic sectional drawing of the paper feed magazine using the paper feeder of this invention. FIG. 3 is an exploded perspective view of a recording paper roll unit. FIG. 6 is a schematic cross-sectional view and a side view showing the paper feed magazine in a state where the recording paper roll unit is set with the set lever set to the set position. FIG. 6 is a schematic cross-sectional view and a side view showing a paper feed magazine when a recording paper roll unit is taken out with the set lever set to a set release position. FIG. 5 is a schematic cross-sectional view and a side view showing a paper feed magazine when a recording paper roll unit is loaded into the paper feed magazine with the set lever set to a set release position. FIG. 5 is a schematic cross-sectional view and a side view showing a paper feed magazine when a recording paper roll unit is to be loaded into the paper feed magazine when the set lever is at the set position. It is a schematic sectional drawing which shows the paper feed magazine using the set lever of another form. FIG. 8 is a schematic cross-sectional view showing a paper feed magazine when the set lever shown in FIG. 7 is moved to a set release position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Paper feed magazine 13 Recording paper roll unit 14 Paper feed roller 15 Separating part 17 Recording paper delivery mechanism 19, 50 Set lever 20 Recording paper roll 21, 22 Roll holder 24 Recording paper 31 Case main body 36 First press roller 37 Second presser Roller 38 Separating plate 39 Separating plate positioning roller 43, 50c Protrusion (erroneous operation prevention member)

Claims (2)

A recording paper roll unit comprising a recording paper roll wound around a long recording paper in a roll shape and roll holders attached to both ends of the roll and having rotating shafts is detachably loaded. A roll storage chamber that rotatably supports the recording paper roll unit; and a leading edge separation plate that separates the leading edge of the recording paper from the outer peripheral surface of the recording paper roll; A recording paper feed mechanism provided movably between a position and a retracted position away from the outer peripheral surface, and a set position for interlocking with the recording paper feed mechanism and setting the recording paper feed mechanism to the contact position A sheet feeding device including a set lever that is movable between a set release position that moves to the retracted position,
When the set lever is in the set position, the recording paper roll unit enters the loading path of the recording paper roll unit. When the recording paper roll unit is already loaded, it is removed, and when it is not loaded, the loading is performed. A sheet feeding device, wherein an error operation blocking member for blocking is provided on the set lever.   The sheet feeding device according to claim 1, wherein the erroneous operation preventing member prevents an erroneous operation due to interference with the roll holder.

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