JP2013023389A - Paper reversing assembly and printer having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper reversing assembly not forming a pressing mark and allowing correct printing of characters in the paper reversing assembly and a printer having the same.SOLUTION: A roller of the paper reversing assembly includes a drive member 31, and pluralities of drive balls 32 and drive rollers 33. In driving the drive member for rotation in a previously determined direction, when the plurality of drive balls are moved by the drive member and respectively move to a plurality of containing tanks 333, movement is restricted by the containing tanks, the drive ball is stayed between the drive member and the drive roller, the drive roller rotates with rotation of the drive member, and after the drive member stops rotation, the drive roller rotates in the previously determined direction relative to the drive member with a friction force generated between a trailing end of printing paper and the drive roller.

Description

  The present invention relates to a folding structure and a printer having the same.

  As shown in FIG. 1, a conventional printer 100 having a double-sided printing function includes a paper feed roller 10, a printing roller 20, a folding structure 30, a paper feed tray 40, and an inkjet 50. The paper feed roller 10, the printing roller 20, and the folding structure 30 are driven by the same motor (not shown). When the printing roller 20 is rotated in the clockwise direction by the motor, the roller of the folding structure 30 is in a stopped state, and the printing roller 20 is rotated in the counterclockwise direction by the motor. When rotating, the roller of the folding structure 30 rotates in the counterclockwise direction.

  When printing on both sides of the printing paper, first, the printing paper is placed in the paper feed tray 40. At this time, the paper feeding roller 10 rotates in the direction of the arrow in FIG. 1 (that is, the clockwise direction) and feeds the printing paper to the printing roller 20. Next, when the printing roller 20 rotates in the clockwise direction, the printing paper is sent to the inkjet 50 and printed.

  When the printing on the first surface of the printing paper is finished, the motor rotates counterclockwise. At this time, the printing roller 20 is also rotated in the counterclockwise direction to send the printing paper to the folding structure 30, and then the printing paper is turned over and sent out to the printing roller 20 as it is. At this time, the front edge of the printing paper is positioned on the printing roller 20. Next, as the motor rotates in the clockwise direction, the printing roller 20 rotates in the clockwise direction, and the printing paper is sent to the inkjet 50 to print the second surface of the printing paper. At this time, the folding structure 30 is stopped.

  As described above, the conventional printer 100 turns the printing paper over and then sends the printing paper to the printing roller 20. At this time, the front end of the printing paper is located on the printing roller 20, and the rear end is located on the folding structure 30. When the folding structure 30 stops, the trailing edge of the printing paper is sandwiched between the roller of the folding structure 30 and the auxiliary roller 300 corresponding thereto, and the propulsive force of the printing roller 20 causes the After the printing paper is pulled out from the folded-back structure 30, it is sent to the inkjet 50 for printing. However, at this time, not only the press marks by the folded structure 30 remain, but if the driving force of the printing roller 20 is weak, characters are not printed accurately on the second surface.

  In view of the above problems, an object of the present invention is to provide a folded structure in which characters are printed accurately without forming press marks in the folded structure, and a printer having the folded structure.

  In order to achieve the above object, the folding structure according to the present invention is applied to a printer and includes a plurality of rollers, and at least one roller positioned at a paper discharge end in the folding structure includes a driving member and a plurality of driving motors. A ball and a drive roller, wherein the drive roller is provided with a storage portion, an inner peripheral wall of the storage portion is provided with a plurality of storage tanks, and the drive member is provided with a plurality of leaf-like pieces, respectively. A recess is provided between the two leaf-like pieces adjacent to each other, and when the driving member is received in the receiving portion, a plurality of receiving spaces are provided between the recess and the side wall of the receiving portion. And the plurality of drive balls are respectively housed in the plurality of housing spaces and moved in the housing spaces, and the driving member is driven to rotate in a predetermined direction. When the plurality of drive balls are moved by the drive members and moved to the plurality of storage tanks, the drive balls are restricted from moving by the storage tanks, and the drive balls are driven by the drive members and the drive rollers. The drive roller rotates with the rotation of the drive member, and after the drive member stops rotating, the drive roller is generated between the trailing edge of the printing paper and the drive roller. The driving member is rotated in a predetermined direction by the frictional force.

  The printer according to the present invention can accurately print characters without forming a press mark in the folded structure when printing the second surface of the printing paper.

It is sectional drawing of the conventional printer. It is sectional drawing of the folding structure of the printer which concerns on this invention. FIG. 3 is an exploded view of a roller having a folded structure shown in FIG. 2. It is the exploded view seen from another vision of the roller of the folding structure shown in FIG. It is a figure which shows the use condition of the folding | returning structure shown in FIG. It is an enlarged view of the roller of the folding structure shown in FIG.

  Hereinafter, a folding structure and a printer having the same according to the present invention will be described in detail with reference to the drawings.

  The folding structure of the present invention and the printer having the folding structure are obtained by further improving the folding structure of the conventional printer 100 shown in FIG. As shown in FIG. 2, the folding structure 30 a in the printer of the present invention includes a first roller 301, a second roller 302, and a third roller 303. The paper feeding roller 10, the printing roller 20, and the first roller 301, the second roller 302, and the third roller 303 in the folding structure 30a are motors installed inside the printer 100 ( (Not shown).

  When printing the first surface of the printing paper, the motor drives the paper feed roller 10 and the printing roller 20 to rotate in the clockwise direction indicated by the arrow in FIG. The first roller 301, the second roller 302, and the third roller 303 are stopped. When the printing on the first surface is finished, the printing roller 20 is rotated in the counterclockwise direction by the motor, whereby the printing paper is sent to the folding structure 30a. Next, the first roller 301 and the third roller 303 are rotated in the direction indicated by the arrow in FIG. 2 (that is, the counterclockwise direction) by driving the motor, and the second roller 302 is rotated clockwise. Rotate around. The printing paper is turned upside down as the first roller 301 to the third roller 303 and the auxiliary roller 300 corresponding to these rollers rotate together. In an embodiment of the present invention, one end where the first roller 301 is installed is a paper feed end of the printer 100, and one end where the third roller 303 is installed is a paper discharge end of the printer 100. It is.

  As can be seen from FIGS. 1 and 2, the arrangement relationship of the first roller 301, the second roller 302, and the third roller 303 is similar to the arrangement relationship of the rollers in the folding structure 30. In addition, since the structures of the first roller 301 to the third roller 303 in the folding structure 30a are the same, the structure of the first roller will be described in detail below.

  Referring to FIG. 3, the first roller 301 includes a driving member 31, a plurality of driving balls 32 and a driving roller 33. The drive member 31 includes a drive shaft 311 and a rotating roller 312. The drive shaft 311 has a rod shape, and the rotating roller 312 is installed on the drive shaft 311 with a certain distance from both ends of the drive shaft 311. A plurality of leaf-like pieces 3121 projecting radially outward are provided at one end of the rotating roller 312 in the axial direction, and a recess 3122 is provided between the two leaf-like pieces 3121 adjacent to each other. It has been. The outer end portion of the leaf-shaped piece 3121 in the counterclockwise circumferential direction protrudes counterclockwise in the circumferential direction, and scoops out the driving ball 32 accommodated in the accommodating tank 333 from the accommodating tank 333. One end of the drive shaft 311 and the drive device 60 are connected to each other, and the drive device 60 is activated by the motor and rotates together with the drive member 31.

  Referring also to FIG. 4, the driving roller 33 has a rod shape, and includes a rod body 331 and at least one feed roller 334 fixed to the rod body 331. A storage portion 332 is provided at the end of the drive roller 33, and a plurality of storage tanks 333 that are recessed toward the outside in the radial direction are provided on the inner peripheral wall of the storage portion 332. The accommodating portions 332 are installed at both ends of the rod body 331, respectively. In addition, the angle formed by the inner peripheral wall positioned in the clockwise direction among the inner peripheral walls defining the storage tank 333 and the inner peripheral wall of the storage section 332 is counterclockwise among the inner peripheral walls defining the storage tank 333. The angle is smaller than the angle formed between the inner peripheral wall located in the rotation direction and the inner peripheral wall of the housing portion 332. Therefore, the drive ball 32 housed in the housing tank 333 is moved by the projecting portion of the leaf-like piece 3121 when the drive member 31 rotates clockwise with respect to the drive roller 33. Is crawled out of. On the other hand, when the drive member 31 rotates counterclockwise with respect to the drive roller 33, the drive ball 32 is not scooped out of the storage tank 333 by the leaf-like piece 3121. Stay inside. In the embodiment of the present invention, the feed roller 334 is formed of rubber.

Referring to FIGS. 5 and 6 together, one end of the drive shaft 311 away from the drive device 60 and the rotating roller 312 are accommodated in the accommodating portion 332 of the drive roller 33. When the rotating roller 312 is accommodated in the accommodating portion 332, a plurality of accommodating spaces 34 are formed between the recess 3122 and the inner peripheral wall of the accommodating portion 332, and the plurality of driving balls 32 are It is accommodated in each of the plurality of accommodating spaces 34 and moves in the accommodating spaces 34. The driving member 31 is rotated with respect to the driving roller 33 by the motor. That is, when the driving member 31 is rotated in the clockwise direction by the motor, the plurality of driving balls 32 are scooped out of the storage tank 333 by the protruding portions of the leaf-like pieces 3121. Therefore, the drive ball 32 moves clockwise in the accommodation space 34 as the drive member 31 rotates.
On the other hand, when the drive member 31 rotates in the counterclockwise direction with respect to the drive roller 33, when the plurality of drive balls 32 move to the plurality of storage tanks 333, the drive tanks 31 counteract with the storage tank 333. Further movement in the clockwise direction (rotation direction of the drive member 31) is restricted, and the drive member 31 is held between the drive roller 33. As a result, the leaf-like piece 3121 and the storage tank 333 are engaged with each other via the drive ball 32, and the drive roller 33 rotates as the drive member 31 rotates.

  When the motor rotates in the clockwise direction, the driving member 31 stops rotating. At this time, when an external force F is applied to the driving roller 33 in the counterclockwise direction, the driving roller 33 is rotated in the counterclockwise direction with respect to the driving member 31 by the external force F. .

  When the printing paper is turned over, the driving member 31 is rotated counterclockwise by the driving device 60, and the plurality of leaf-like pieces 3121 of the driving member 31 moves the driving ball 32, and the driving ball 32 directly enters the storage tank 333 of the drive roller 33. At the same time, the rotating roller 312 moves the driving roller 33 by the driving ball 32 and turns the printing paper together with the feeding roller 334 and the auxiliary roller 300 corresponding thereto.

  When the printing paper is turned upside down in the folding structure 30, the motor of the printer 100 rotates in a clockwise direction and rotates the printing roller 20 in a clockwise direction. The connection between the motor and the driving device 60 is such that when the motor rotates in the first direction, the driving device 60 is activated, and when the motor rotates in the second direction opposite to the first direction, The driving device 60 does not move, and the driving member 31 stops rotating.

  The front end of the printing paper after being turned over is moved toward the inkjet 50 by the printing roller 20, and at this time, the rear end of the printing paper is the third roller 303 and the corresponding auxiliary roller 300. It is sandwiched between. When the printing paper moves toward the inkjet 50, a frictional force, that is, the external force F is generated between the trailing edge of the printing paper and the driving roller 33. The frictional force rotates the driving roller 33 in the counterclockwise direction with respect to the driving member 31 to interlock the printing roller 20. As a result, the printing paper is smoothly detached from the folding structure 30, and when the second surface of the printing paper is printed, the pressing mark of the folding structure 30 is not formed, and characters can be printed accurately. .

  In another embodiment, in the folding structure 30a, the structure of at least one third roller 303 located at the end of the printing paper is the same structure as the above-described roller.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-described embodiments, and various modifications or corrections are possible within the scope of the present invention. Needless to say, it is also included in the scope of the claims of the present invention.

DESCRIPTION OF SYMBOLS 100 Printer 10 Paper feed roller 20 Printing roller 30, 30a Folding structure 40 Paper feed tray 50 Inkjet 60 Drive device 300 Auxiliary roller 301 First roller 302 Second roller 303 Third roller 31 Drive member 32 Drive ball 33 Drive roller 311 Drive shaft 312 Rotating roller 3121 Leaf-like piece 3122 Recess 331 Rod body 332 Housing portion 333 Housing tank 334 Feeding roller 34 Housing space

Claims (6)

In the folded structure with a plurality of rollers applied to the printer,
At least one roller located at the paper discharge end in the folded structure includes a driving member, a plurality of driving balls and a driving roller,
The drive roller is provided with a storage portion, an inner peripheral wall of the storage portion is provided with a plurality of storage tanks, the drive member is provided with a plurality of leaf-like pieces, and the two leaf-like shapes adjacent to each other. Recesses are provided between the pieces,
When the drive member is housed in the housing portion, a plurality of housing spaces are formed between the recess and the inner peripheral wall of the housing portion, and the plurality of driving balls are housed in the plurality of housing spaces, respectively. And move in the accommodation space,
When the drive member is driven and rotates in a predetermined direction, the plurality of drive balls are moved by the drive member and moved to the plurality of storage tanks, respectively. The movement of the driving ball is held between the driving member and the driving roller, and the driving roller rotates with the rotation of the driving member. After the driving member stops rotating, the driving ball is stopped. The folding structure, wherein the roller is rotated in a predetermined direction with respect to the driving member by a frictional force generated between a rear end of the printing paper and the driving roller.   The driving member includes a driving shaft and a rotating roller, the driving shaft is in a rod shape, the rotating roller is fixed to the driving shaft, and one end of the rotating roller and the driving shaft is in a housing portion of the driving roller. 2. The folding structure according to claim 1, wherein the other end of the drive shaft is connected to a drive device, and the drive device is activated by a motor and rotates together with the drive member.   The folded structure according to claim 2, wherein the plurality of leaf-like pieces are provided at an end portion of the rotating roller, and a recess is provided between the two leaf-like pieces adjacent to each other.   The folding structure according to any one of claims 1 to 3, wherein the driving roller has a rod shape and includes a rod body and at least one feed roller fixed to the rod body.   An angle formed by an inner peripheral wall located in the predetermined direction of the inner peripheral wall defining the storage tank and an inner peripheral wall of the storage section is predetermined in the inner peripheral wall defining the storage tank. 5. The folded structure according to claim 1, wherein the folded structure is larger than an angle formed by an inner peripheral wall located in a direction opposite to the direction of the inner wall and an inner peripheral wall of the housing portion.   A printer having the folded structure according to any one of claims 1 to 5.