JP2011102015A - Printer with cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printer having a cutter in which the tip of a fixed blade is concealed when an open/close lid is opened with a simple structure. <P>SOLUTION: The fixed blade 28 attached to a printer body 2 and a movable blade 15 attached to the open/close lid 5 are disposed in the recording paper carrying path 16 of a roll paper printer 1. The fixed blade 15 is disposed to an open side of the open/close lid 5 of the fixed blade 28, and a recording paper guide member 32 is disposed on an open side of the open/close lid 5 of the movable blade 15. The fixed blade 28 is displaceable between a fixed blade cutting standby position 28A located at a recording paper cutting position B of a blade tip 28a, and a concealing position 28B for concealing the blade tip 28a in the recording paper guide member 32, and is biased to the open side of the open/close lid 5 by a coil spring 33. The fixed blade 28 is located at the fixed blade cutting standby position 28A pressed to the movable blade 15 by the coil spring 33, when the open/close lid 5 is closed. The fixed blade 28 is displaced to the concealing position 28B by biasing force of the coil spring 33 when the open/close lid 5 is opened. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a printer with a cutter in which a recording paper transport path for transporting a recording paper to pass through a recording paper cutting position by the cutter is opened when an opening / closing lid attached to the printer body so as to be opened and closed is opened. . More specifically, the present invention relates to a printer with a cutter that can hide the cutting edge of a fixed blade when an opening / closing lid is opened.

  As a roll paper printer with a cutter, when the open / close lid attached to the printer body is opened, the recording paper transport path from the roll paper storage section to the recording paper discharge port via the printing position by the print head and the recording paper cutting position by the cutter Is configured to be in an open state. In the roll paper printer with a cutter having such a configuration, when the roll paper in which the recording paper is pulled out is inserted into the space opened by opening the open / close lid, the roll paper is opened when the open / close lid is closed. Is stored in the roll paper storage unit, and the recording paper is set in the recording paper conveyance path, so that the roll paper can be easily loaded.

  However, in the configuration in which the recording paper conveyance path is opened by opening the opening / closing lid, the blade edge of the fixed blade attached to the printer main body is exposed to the opened space, which is dangerous. For this reason, in the roll paper printer with a cutter described in Patent Document 1, the safety of the apparatus is ensured by displacing the fixed blade from the recording paper cutting position to the hidden position hidden in the cutter cover when the open / close lid is opened. ing. In this document, the fixed blade is mounted on an arm rotatably attached to the printer main body, and is displaced between the recording paper cutting position and the hidden position by the rotation of the arm. The arm is urged by the urging member so that the fixed blade is located at the hidden position, and when closing the open / close lid, a part of the platen mounted on the open / close lid is brought into contact with the arm. The arm is rotated against the urging force of the urging member, and the fixed blade is displaced from the hidden position to the recording paper cutting position. When opening the opening / closing lid, the arm is returned to the original position by the urging force of the urging member by releasing the contact between a part of the platen and the arm, and the fixed blade is hidden from the recording paper cutting position. It is displaced to.

JP 2005-161832 A

  In Patent Document 1, in order to displace the fixed blade between the recording paper cutting position and the hidden position, the fixed blade is mounted on the arm. A biasing member is provided to bias the arm. Further, the platen mounted on the open / close lid is provided with a contact portion to the arm, and the fixed blade is displaced by rotating the arm by the contact portion. For this reason, the mechanism for displacing the fixed blade is complicated, and the number of parts is increasing. Here, there is a problem in that the complexity of the mechanism and the increase in the number of parts increase the manufacturing cost of the apparatus.

  In view of such a point, an object of the present invention is to propose a printer with a cutter that can hide the cutting edge of a fixed blade when the opening / closing lid is opened with a simple configuration.

In order to solve the above problems, the printer with a cutter of the present invention is
An open / close lid attached to the printer body to be openable and closable;
A fixed blade mounted on the printer body;
A movable blade mounted on the open / close lid so as to be positioned on the open side of the open / close lid with respect to the fixed blade;
An urging member urging the fixed blade toward the opening side of the open / close lid;
A fixed blade covering member mounted at a position closer to the opening side of the open / close lid than the fixed blade in the printer main body,
In the state where the opening / closing lid is closed, the fixed blade is held at a cutting standby position pressed against the movable blade by the biasing member,
When the opening / closing lid is opened, the fixed blade is displaced toward the fixed blade covering member by the urging force of the urging member, and the blade edge of the fixed blade is moved from the opening direction side of the opening / closing lid to the fixed blade. It is characterized by being held in a hidden position that is covered and covered by the covering member.

  According to the present invention, a fixed blade covering member mounted on the printer body, a movable blade attached to the open / close lid, and a fixed blade mounted on the printer body are arranged from the opening side of the open / close lid, and the fixed blade is attached to the open / close lid by an urging member. When the open / close lid is closed, the fixed blade is held at the cutting standby position pressed against the movable blade, and when the open / close lid is opened, the fixed blade is displaced toward the fixed blade covering member. Then, the blade edge is held at the hidden position covered by the fixed blade covering member. Here, the cutter includes a movable blade that slides on the fixed blade to cut the recording paper, and an urging member that presses one of the movable blade and the fixed blade against the other in order to cause the movable blade to slide on the fixed blade. Therefore, in this invention, while using the structure (movable blade and biasing member) with which the cutter was originally provided as it is, they devised arrangement, the biasing direction by a biasing member, and arrangement of a fixed blade covering member. This constitutes a mechanism for hiding the blade edge of the fixed blade in the fixed blade cover member when the opening / closing lid is opened. Therefore, the mechanism is simplified and an increase in the number of parts is suppressed. Therefore, the manufacturing cost of the apparatus can be suppressed.

  In this invention, it has a recording paper guide member which guides the recording paper sent out between the said fixed blade and a movable blade in the state which the said opening-and-closing lid | cover closed, The said recording paper guide member is the said fixed blade It is desirable that the cutting edge of the fixed blade which is a covering member and is in the hidden position is in a position retracted from the recording paper guide surface defined by the paper guide. In this way, since the recording paper guide member can be used as the fixed blade covering member, an increase in the number of parts can be further suppressed.

  In the present invention, in order to hold the fixed blade at the cutting standby position, the fixed blade can rotate in the opening direction of the opening / closing lid around the end opposite to the blade edge. The fixed blade that is mounted on the cutting standby position has an end portion in the blade direction of the blade edge of the movable blade, and a closing direction of the open / close lid by an end portion in the blade line direction of the blade edge of the movable blade It is desirable to be pressed against.

  In the present invention, when roll paper is used as recording paper, it has a roll paper storage portion for storing roll paper, and the opening / closing lid is an opening / closing lid for opening / closing the roll paper storage portion, When the lid is opened, it is desirable that the recording paper transport path from the roll paper storage unit through the recording paper recording paper cutting position by the fixed blade and the movable blade is switched to the open state.

  According to the present invention, the configuration (movable blade and urging member) originally provided by the cutter is used as it is, and the arrangement thereof, the urging direction by the urging member, and the arrangement of the fixed blade covering member are devised. Thus, a mechanism for hiding the blade edge of the fixed blade in the fixed blade cover member when the open / close lid is opened is configured. Therefore, the mechanism is simplified and an increase in the number of parts is suppressed. Therefore, the manufacturing cost of the apparatus can be suppressed.

1 is an external perspective view of a roll paper printer with a cutter according to the present invention. It is a schematic sectional drawing of a roll paper printer with a cutter. It is a perspective view of an auto cutter unit. It is the front view and sectional drawing of a recording paper guide member and an auto cutter unit. It is explanatory drawing for demonstrating a movable blade drive mechanism. It is the front view and sectional drawing of a recording paper guide member and an auto cutter unit. FIG. 6 is a longitudinal sectional view around a recording paper cutting position when the opening / closing lid is opened.

  Hereinafter, an embodiment of a roll paper printer with a cutter to which the present invention is applied will be described with reference to the drawings.

(overall structure)
FIG. 1 is an external perspective view of a roll paper printer with a cutter. 1A shows a state where the opening / closing lid is in the closed position, and FIG. 1B shows a state where the opening / closing lid is in the open position. A roll paper printer 1 with a cutter is an ink jet printer that performs color printing on a long recording paper fed out from a roll paper, and includes a printer body 2 that has a rectangular parallelepiped shape as a whole as shown in FIG. ing. An opening 4a of a roll paper storage unit 4 for storing the roll paper 3 (see FIG. 2) is formed in the center of the front surface of the printer main body 2, and the opening 4a is attached to the printer main body 2 so as to be openable and closable. The closed lid 5 is closed. A recording paper discharge guide 6 is attached to the upper end of the opening / closing lid 5, and a recording paper discharge port 7 is formed between the recording paper discharge guide 6 and the upper edge portion of the opening 4 a of the printer body 2. Yes. A power switch 8, a paper feed switch 9, a plurality of operation state display lamps 10, and the like are arranged on the right side of the opening / closing lid 5 of the printer body 2. A mounting port 11a of an ink cartridge mounting part 11 for mounting an ink cartridge is opened on the left side portion of the opening / closing lid 5 of the printer body 2, and the ink cartridge 12 is mounted on the ink cartridge mounting part 11 from this opening. ing.

  When the lock (not shown) is released and the recording paper discharge guide 6 of the opening / closing lid 5 is put on the finger and pulled forward, the opening / closing lid 5 is tilted forward from the closed position 5A shown in FIG. It is possible to open up to the opening position 5B shown in FIG. With the opening operation of opening the opening / closing lid 5 from the closed position 5 </ b> A, the movable blade 15 constituting the platen 13 and the auto cutter 14 moves together with the opening / closing lid 5 to the front of the printer main body 2. As a result, the recording paper transport path 16 from the roll paper storage unit 4 to the recording paper discharge port 7 is opened, so that the loading operation of the roll paper 3 can be easily performed from the front of the printer.

(Internal structure)
FIG. 2 is a schematic cross-sectional view of the printer main body, showing a state in which roll paper is loaded in the roll paper storage unit and the open / close lid is in the closed position. As shown in FIG. 2, a roll paper storage unit 4 is formed in the center of the printer body 2. The roll paper 3 is loaded in the roll paper storage unit 4 in a horizontally placed state with its central axis facing the printer width direction. The long recording paper 3 a fed out from the roll paper 3 extends obliquely upward toward the rear of the printer via the feeding roller 17, and is then bent forward by the tension roller 18. The paper is transported along a recording paper transport path 16 extending to the recording paper discharge port 7. The tension roller 18 is urged toward the rear of the printer by a spring force, and a predetermined tension is applied to the recording paper 3 a that has passed through the tension roller 18.

  A recording paper transport path portion 16 a extending in the front-rear direction of the printer is located immediately above the roll paper storage unit 4. In the recording paper conveyance path portion 16a, a printing position A and a recording paper cutting position B are provided in this order from the rear side of the printer toward the front side of the printer. At the printing position A, the inkjet head 20 mounted on the carriage 19 and the platen 13 are opposed to each other with a certain gap so that the nozzle surface faces downward. The platen 13 is mounted on a platen frame 21 extending in the front-rear direction of the printer, and the printing position A of the inkjet head 20 is defined by the platen 13. A tension roller 18 is attached to the rear end portion of the platen frame 21. The carriage 19 is movable along a carriage guide shaft 22 spanned in the printer width direction, and is reciprocated by a carriage motor (not shown).

  In the recording paper conveyance path portion 16a, a paper feed driving roller 23 is disposed on the rear side of the printer of the platen 13, and a paper feed driven roller 24 is pressed against the paper feed driving roller 23 from below. . A paper discharge driving roller 25 is disposed between a printing position A and a recording paper cutting position B on the front side of the platen 13, and a paper discharge driven roller 26 is pressed against the paper discharge driving roller 25 from above. ing. The paper feed driving roller 23 and the paper discharge driven roller 26 are mounted on the printer main body 2, and the paper feed driven roller 24 and the paper discharge driving roller 25 are mounted on the platen frame 21.

  An automatic cutter unit 27 is disposed at the recording paper cutting position B. The auto cutter unit 27 includes a pair of fixed blades 28 and a movable blade 15, an auto cutter 14 including a movable blade driving mechanism 29 that drives the movable blade 15 in a direction toward and away from the fixed blade 28, and recording paper An upper frame 30 and a lower frame 31 are provided above and below the conveyance path portion 16a.

  The upper frame 30 is bridged in the printer width direction at the front end portion of the printer body 2. The fixed blade 28 is attached to the upper frame 30 such that the blade line extends in the printer width direction, and the blade edge 28a is directed to the recording paper conveyance path 16. The lower frame 31 is mounted on the front end portion of the platen frame 21. The movable blade 15 is mounted on the lower frame 31 such that the blade line extends in the printer width direction. The movable blade 15 is disposed on the front side of the printer (the opening side of the opening / closing lid 5) with respect to the fixed blade 28, and the blade edge 15a faces the recording paper conveyance path 16.

  A recording paper guide member (fixed blade covering member) 32 extending in the printer width direction is disposed at a position adjacent to the front side of the movable blade 15 (opening side of the opening / closing lid 5). The recording paper guide member 32 is attached to the printer main body 2 via the upper frame 30.

  The platen frame 21 is attached to the opening / closing lid by connecting the front end portion thereof to the recording paper discharge guide 6. When the opening / closing lid 5 moves from the closed position 5A to the opened position 5B, the platen frame 21 moves together with the opening / closing lid 5 It is pulled out from the main body 2 to the front of the printer. When the opening / closing lid 5 is opened, components such as the platen 13 mounted on the platen frame 21, the movable blade 15, the movable blade driving mechanism 29, the tension roller 18, the paper feed driven roller 24, and the paper discharge driving roller 25 are opened and closed. Together with the printer, the roll paper storage unit 4 and the recording paper transport path 16 are opened.

  When the roll paper 3 is loaded into the roll paper storage unit 4, the roll paper 3 in a state in which the recording paper 3 a is pulled out through the space opened by opening the opening / closing lid 5 is loaded into the roll paper storage unit. 4 After that, when the opening / closing lid 5 is closed, components such as the platen 13, the movable blade 15, the movable blade drive mechanism 29, the tension roller 18, the paper feed driven roller 24, and the paper discharge drive roller 25 mounted on the platen frame 21. The recording paper conveyance path 16 is formed by returning to the original position, and the platen 13 faces the inkjet head 20 with a certain gap to define the printing position A, and the movable blade 15 is in the recording paper cutting position. B is placed. At the same time, the drawn recording paper 3 a is set in a state where it passes the printing position A and the recording paper cutting position B on the platen 13 on the recording paper transport path 16.

  The recording paper 3 a drawn from the roll paper storage unit 4 to the recording paper conveyance path 16 is conveyed via the printing position A through the paper feeding driving roller 23 and the paper feeding driven roller 24. Printing is performed by the inkjet head 20 on the surface of the recording paper 3a. Further, the recording paper 3 a passes between the paper discharge driving roller 25 and the paper discharge driven roller 26 via the recording paper cutting position B, and is cut in the width direction by the auto cutter 14 at the recording paper cutting position B. The A piece of recording paper of a certain length obtained by cutting is issued as a receipt.

(Auto cutter unit and recording paper guide member)
FIG. 3A is a cross-sectional view of the auto cutter unit as viewed from the front and obliquely above, and FIG. FIG. 4A is a partial front view of the auto cutter unit with the recording paper guide member attached thereto, and FIG. 4B is a cross-sectional view thereof. In FIG. 4, the movable blade is in the cutting standby position. 5A and 5B are explanatory diagrams for explaining the movable blade driving mechanism. FIG. 5A shows a state where the movable blade is in the cutting standby position, and FIG. 5B shows a state where the movable blade is in the cutting end position. Is shown. FIG. 6A is a partial front view of the auto cutter unit in a state where the movable blade is at the cutting end position, and FIG. 6B is a cross-sectional view thereof.

  As shown in FIG. 3, the upper frame 30 includes a top plate portion 30a extending in the front-rear direction of the printer, a front plate portion 30b extending downward from the front end edge of the top plate portion 30a, and a lower end edge of the front plate portion 30b toward the rear of the printer. An extending lower plate portion 30c is provided.

  As shown in FIG. 4, the fixed blade 28 is plate-shaped and has a rectangular shape that is long in the printer width direction as a whole. The fixed blade 28 includes parallel front end surfaces 28b and rear end surfaces 28c extending in the vertical direction, and an inclined surface 28d formed between the lower end edge of the front end surface 28b and the lower end edge of the rear end surface 28c. A corner between the surface 28b and the inclined surface 28d is a cutting edge 28a. The inclined surface 28d is slightly inclined upward toward the rear side of the printer, and the cutting edge 28a is standing with respect to the recording paper conveyance path 16. A pair of contact portions 28e are formed on both sides of the blade edge 28a in the printer width direction so that a protrusion 15c of the movable blade 15 described later contacts, and the pair of contact portions 28e convey recording paper in the printer width direction. It is located outside the path 16. In addition, a pair of rectangular cutout portions 28f are provided at the upper edge portion of the fixed blade 28 at symmetrical positions in the printer width direction, and the upper edge central portion 28g between the pair of cutout portions 28f is located on the upper side. The top plate portion 30a of the frame 30 is attached to the central portion in the printer width direction.

  The fixed blade 28 attached to the upper frame 30 has a fixed blade cutting standby position (cutting standby position) 28A in which the blade edge 28a is at the recording paper cutting position B around the upper edge central portion 28g, and the blade edge 28a is a recording paper guide. It can be rotated between a hidden position 28B (a position indicated by a two-dot chain line in FIG. 4B) hidden behind the recording paper guide member 32 in the vicinity of the member 32. Further, one end of the coil spring 33 is locked to the central portion of the fixed blade 28 in the printer width direction, and the other end of the coil spring 33 is an angle between the top plate portion 30a and the front plate portion 30b. Is attached to a locking portion 30d formed at a central portion in the printer width direction. The fixed blade 28 is biased toward the front side of the printer (the opening side of the opening / closing lid 5) by the coil spring 33.

  Here, a recording paper guide member 32 is attached to the front plate portion 30b of the upper frame 30 from the front of the printer. The recording paper guide member 32 includes a guide plate portion 32a extending in the front-rear direction of the printer substantially parallel to the surface of the platen 13, and an inclined plate inclined upward from the rear edge of the guide plate portion 32a toward the rear of the printer. A portion 32b and a mounting plate portion 32c extending upward from the front edge of the guide plate portion 32a are provided. The rear end of the inclined plate portion 32b is located slightly in front of the printer with respect to the movable blade 15.

  The lower end surface 32d of the guide plate portion 32a and the inclined surface 32e facing downward of the inclined plate portion 32b are arranged so that the surface (upper surface) of the recording paper 3a that has passed the recording paper cutting position B is along the recording paper conveyance path 16. It is a recording paper guide surface to guide. The lower end surface 32 d is located below the cutting edge 28 a of the fixed blade 28 and is located below the lower end of the paper discharge driven roller 26. If the lower end surface 32d is positioned below the lower end of the paper discharge driven roller 26, the leading end of the recording paper 3a discharged from the recording paper discharge port 7 is pulled upward by the operator before being cut. In addition, it is possible to prevent the paper discharge driven roller 26 from being subjected to a load for moving the paper discharge driven roller 26 upward.

  In the recording paper guide member 32, the lower end edge portion of the mounting plate portion 32c, the guide plate portion 32a, and the inclined plate portion 32b are formed so that the dimensions in the printer width direction are shorter than the dimensions of the fixed blade 28 in the printer width direction. . In a state where the recording paper guide member 32 is attached to the upper frame 30, the recording paper guide member 32 covers the cutting edge 28a of the fixed blade 28 from the front of the printer, and a pair of contact portions provided on both sides of the cutting edge 28a. 28e is exposed in front of the printer.

  Next, as shown in FIGS. 3 and 4, the lower frame 31 includes left and right side plate portions 31 a and 31 b, and a front plate portion 31 c that spans the front end edges of the left and right side plate portions 31 a and 31 b. The left and right side plate portions 31a and 31b are provided with a bottom plate portion 31d that spans the lower edge. A partition plate 34 is bridged in the middle of the left and right side plate portions 31a and 31b in the front-rear direction of the printer in parallel with the front plate portion 31c.

  The movable blade 15 is disposed on the rear side of the partition plate 34. The cutting edge shape of the movable blade 15 is such that the central portion in the printer width direction is depressed downward, and is inclined upward toward both ends. A groove-shaped notch 15b is formed at the center of the blade edge 15a. A pair of projecting portions 15c projecting upward is provided on both sides of the blade edge 15a in the printer width direction. The pair of protrusions 15 c are in contact with the pair of contact portions 28 e of the fixed blade 28 at a position outside the recording paper transport path 16 in the printer width direction.

  In the partition plate 34, a guide groove 34a extending in the vertical direction is formed at a central portion in the printer width direction. A slider 35 is inserted into the guide groove 34a so as to be movable up and down along the guide groove 34a. The slider 35 is attached to the movable blade 15 by two upper and lower pins 36 and 37, so that the movable blade 15 can move in the vertical direction along the guide groove 34 a together with the slider 35.

  The movable blade drive mechanism 29 includes a cutter motor 38 disposed behind the partition plate 34 so that the output shaft extends in the printer width direction. The output shaft of the cutter motor 38 is connected to a drive gear 40 disposed on the front side of the partition plate 34 via a gear train 39 including a worm gear. The drive gear 40 is rotatable about a support shaft 41 attached to the front plate portion 31c, and the rotational movement of the drive gear 40 is converted into the reciprocating movement of the movable blade 15 in the vertical direction by the crank mechanism 42.

  As shown in FIG. 5, the crank mechanism 42 is formed with a crank pin 43 that is vertically attached to a position off the center of rotation on the circular end surface of the drive gear 40, and a linear first slide groove 44 a having a fixed length. Lever 44 is provided. The lever 44 is disposed on the front side of the partition plate 34 and can pivot in the vertical direction along the front end surface of the partition plate 34 around a support shaft 45 different from the support shaft 41 of the drive gear 40. The crank pin 43 is slidably inserted into the first slide groove 44a. When the crank pin 43 rotates once around the support shaft 41 as the drive gear 40 rotates, the crank pin 43 and the printer are moved in the vertical direction. Following the movement in the width direction, the lever 44 reciprocates in the vertical direction about the support shaft 45.

  The lever 44 is formed with a second slide groove 44b that is shorter than the first slide groove 44a. The upper pin 36 of the two pins 36 and 37 connecting the movable blade 15 and the slider 35 is inserted into the second slide groove 44b in a slidable state. When the second slide groove 44b reciprocates in the vertical direction as the lever 44 reciprocates in the vertical direction, the pin 36 reciprocates in the vertical direction following the reciprocation of the second slide groove 44b. Therefore, the movable blade 15 has a movable blade cutting standby position 15A shown in FIG. 5A where the blade edge 15a faces the blade edge 28a of the fixed blade 28 at a predetermined interval, and the entire area of the blade edge 15a is a fixed blade. It reciprocates in the up and down direction between the movable blade cutting end position 15B shown in FIG.

  When the recording paper 3a conveyed through the recording paper conveyance path 16 reaches the recording paper cutting position B, the movable blade driving mechanism 29 drives the cutter motor 38 to cut the movable blade 15 from the movable blade cutting standby position 15A. Move to end position 15B. Thereby, the blade edge 15a of the movable blade 15 and the blade edge 28a of the fixed blade 28 overlap from both sides in the width direction of the printer width direction, and the recording paper 3a at the recording paper cutting position B is cut from both sides of the printer width direction. When the movable blade 15 reaches the movable blade cutting end position 15B, as shown in FIG. 6, the entire region of the blade edge 15a of the movable blade 15 and the blade edge 28a of the fixed blade 28 overlap, and the cutting of the recording paper 3a is completed. In this example, the notch 15b is formed at the center of the cutting edge 15a of the movable blade 15. Therefore, even if the entire area of the cutting edge 15a of the movable blade 15 and the cutting edge 28a of the fixed blade 28 overlap, the recording paper 3a is completely removed. This is a partial cut that leaves only a part of the center in the width direction without cutting. When cutting of the recording paper 3a is completed, the movable blade 15 is returned to the movable blade cutting standby position 15A.

  In the case where the movable blade drive mechanism 29 breaks down during the cutting operation, and the blade edge 15a of the movable blade 15 falls into a locked state where it is positioned above the lower end surface 32d of the recording paper guide member 32. When the opening / closing lid 5 is opened, the movable blade 15 moving to the opening side of the opening / closing lid 5 interferes with the recording paper guide member 32. As a result, the movement of the opening / closing lid 5 is restricted and the opening / closing lid 5 does not open. Therefore, the movable blade 15 in a state in which the blade edge 15 a protrudes to a position where it overlaps with the fixed blade 28 is not exposed to the outside of the printer main body 2 together with the opening / closing lid 5.

(Displacement of fixed blade accompanying opening / closing of the lid)
With reference to FIG. 4 and FIG. 7, the displacement of the fixed blade accompanying opening and closing of the opening / closing lid will be described. FIG. 7A is a partial cross-sectional view around the recording paper cutting position of the roll paper printer with a cutter in a state where the open / close lid is opened, and FIG. 7B is a blade edge of the fixed blade in the state where the open / close lid is opened. It is a fragmentary sectional view which expands and shows a part.

  As shown in FIG. 4, in a state where the open / close lid 5 is closed at the closed position 5A, the movable blade 15 is disposed at the recording paper cutting position B, and the protruding portion 15c of the movable blade 15 contacts the fixed blade 28. The contact portion 28e is in contact with the front side of the printer. In this state, the fixed blade 28 is pressed against the movable blade 15 by the urging force of the coil spring 33, and is held at the fixed blade cutting standby position 28A. The cutting edge 28 a of the fixed blade 28 faces the recording paper conveyance path 16.

  When the open / close lid 5 is opened when the roll paper 3 is loaded into the roll paper storage unit 4, the movable blade 15 moves to the front side of the printer together with the open / close lid 5 as shown in FIG. As the movable blade 15 moves, the contact between the projecting portion 15c of the movable blade 15 and the contact portion 28e of the fixed blade 28 is released, so that the fixed blade 28 is moved to the fixed blade cutting standby position 28A by the biasing force of the coil spring 33. To the hidden position 28B.

  At the hidden position 28B, as shown in FIG. 7B, the inclined surface 28d of the fixed blade 28 is slightly inclined upward toward the front side of the printer, and the cutting edge 28a of the fixed blade 28 has an inclined surface 28d and a rear end surface. It is located above the corner part 28h between 28c. That is, at the hidden position 28B, the cutting edge 28a of the fixed blade 28 faces the recording paper guide member 32 in the vicinity of the recording paper guide member 32 and is covered with the inclined plate portion 32b.

  Next, when the opening / closing lid 5 is closed, the movable blade 15 that has moved to the front of the printer from the recording paper cutting position B moves to the rear of the printer toward the recording paper cutting position B. Accordingly, the protruding portion 15c of the movable blade 15 contacts the contact portion 28e of the fixed blade 28 from the front side of the printer. The movable blade 15 presses the fixed blade 28 against the rear side of the printer against the urging force of the coil spring 33. Thereafter, when the opening / closing lid 5 is located at the closed position 5A, the movable blade 15 is disposed at the recording paper cutting position B, and the fixed blade 28 is displaced to the fixed blade cutting standby position 28A.

  According to this example, when the opening / closing lid 5 is opened, the cutting edge 28a of the fixed blade 28 is directed from the recording paper conveyance path 16 to the recording paper guide member 32 and is covered and hidden by the recording paper guide member 32. It becomes. As a result, when the operator opens the opening / closing lid 5 and opens the recording paper transport path 16 and the roll paper storage unit 4, the blade edge 28 a of the fixed blade 28 is not exposed to the open space. Therefore, the operator can be prevented from touching the cutting edge 28a of the fixed blade 28 when the roll paper 3 is loaded.

  Here, the auto cutter is usually a movable blade that slides on the fixed blade to cut the recording paper, and an urging member that presses one of the movable blade and the fixed blade against the other in order to slide the movable blade against the fixed blade. Therefore, according to this example, the configuration (movable blade 15 and coil spring 33) originally provided in such an auto cutter is used as it is, and their arrangement, the biasing direction of the biasing member, and recording By devising the arrangement of the paper guide member (fixed blade cover member) 32, a mechanism for hiding the cutting edge 28a of the fixed blade 28 in the recording paper guide member 32 when the opening / closing lid 5 is opened is configured. Therefore, the mechanism is simplified and an increase in the number of parts is suppressed. Therefore, the manufacturing cost of the apparatus can be suppressed.

  In the above example, the auto cutter 14 is of a type that linearly reciprocates in the direction in which the movable blade 15 approaches and separates from the fixed blade 28, but the movable blade approaches and separates from the fixed blade. Even when a vertical-type auto-cutter that swivels in a direction is used, when the fixed blade is attached to the printer body and the movable blade is attached to an opening / closing lid attached to the printer body so as to be openable and closable, the present invention Can be applied.

1. Roll paper printer, 2. Printer body, 3. Roll paper, 3a, recording paper, 4. Roll paper storage, 4a, opening, 5. Opening / closing lid, 5A, closing position, 5B, opening position, 6. Recording paper discharge guide, 7-Recording paper discharge port, 8-Power switch, 9-Switch, 10-Operation status display lamp, 11-Ink cartridge mounting part, 11 a-Installation port, 12-Ink cartridge, 13-Platen, 14 -Auto cutter, 15-Movable blade, 15a-Cutting edge, 15b-Notch, 15c-Projection, 15A-Movable blade cutting standby position, 15B-Movable blade cutting end position, 16-Recording paper transport path, 16a-Recording Paper transport path, 17, roller, 18 tension roller, 19 carriage, 20 inkjet head, 21 platen frame, 22 carriage guide shaft 23 · Drive roller, 24 · Driven roller, 25 · Paper discharge drive roller, 26 · Paper discharge driven roller, 27 · Auto cutter unit, 28 · Fixed blade, 28a · Cutting edge, 28b · Front end surface, 28c · Rear end surface, 28d -Inclined surface, 28e-Contact part, 28f-Notch part, 28g-Upper edge center part, 28h-Corner part, 28A-Fixed blade cutting standby position, 28B-Hidden position, 29-Movable blade drive mechanism, 30- Upper frame, 30a / top plate portion, 30b / front plate portion, 30c / lower plate portion, 30d / locking portion, 31 / lower frame, 31a / 31b / side plate portion, 31c / front plate portion, 31d / bottom plate portion 32. Recording paper guide member (fixed blade cover member), 32a. Guide plate portion, 32b, inclined plate portion, 32c, plate portion, 32d, lower end surface, 32e, inclined surface, 33, coil spring, 34, partition. Plate, 34a · Guide groove, 35 · Slider, 36 · 37 · Pin, 38 · Cutter motor, 39 · Gear train, 40 · Drive gear, 41 · Support shaft, 42 · Crank mechanism, 43 · Crank pin, 44a · No. 1 slide groove, 44b / second slide groove, 44 / lever, 45 / support shaft, A / printing position, B / recording paper cutting position

Claims (4)

An open / close lid attached to the printer body to be openable and closable;
A fixed blade mounted on the printer body;
A movable blade mounted on the open / close lid so as to be positioned on the open side of the open / close lid with respect to the fixed blade;
An urging member urging the fixed blade toward the opening side of the open / close lid;
A fixed blade covering member mounted at a position closer to the opening side of the open / close lid than the fixed blade in the printer main body,
In the state where the opening / closing lid is closed, the fixed blade is held at a cutting standby position pressed against the movable blade by the biasing member,
When the opening / closing lid is opened, the fixed blade is displaced toward the fixed blade covering member by the urging force of the urging member, and the blade edge of the fixed blade is moved from the opening direction side of the opening / closing lid to the fixed blade. A printer with a cutter, wherein the printer is held in a hidden position covered with a covering member. In claim 1,
A recording paper guide member for guiding the recording paper fed out between the fixed blade and the movable blade in a state where the opening / closing lid is closed;
The recording paper guide member is the fixed blade covering member,
The printer with a cutter, wherein the cutting edge of the fixed blade in the hidden position is in a position retracted from a recording paper guide surface defined by the paper guide. In claim 2,
The fixed blade is mounted on the printer body in a state in which the fixed blade can be rotated in the opening direction of the opening / closing lid around the end opposite to the blade edge,
The fixed blade held at the cutting standby position has its edge in the blade direction pressed against the closing direction of the open / close lid by the edge of the movable blade in the blade direction. A printer with a cutter. In any of claims 1 to 3,
A roll paper storage unit for storing roll paper;
The opening / closing lid is an opening / closing lid for opening / closing the roll paper storage unit,
A printer with a cutter, wherein when the opening / closing lid is opened, a recording paper transport path from the roll paper storage unit through a recording paper cutting position by the fixed blade and the movable blade is switched to an open state.

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