JP2014034152A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer capable of accurately and easily adjusting a position of a guide member for guiding an ink ribbon passing through between a printing part and a platen roller to a take-up part direction.SOLUTION: A peeling plate 200 for guiding an ink ribbon 31 to a take-up reel 33 direction is provided at a part in which the ink ribbon 31 and recording paper 4 passed through between a head unit 2 and a platen roller 6 overlapping each other are separated from each other. The peeling plate 200 is adjustably attached to a head bracket 220 via an eccentric pin 230, and a graduation part S indicating a rotational position of the eccentric pin 230 is provided on the peeling plate 200, and a position of the peeling plate 200 is adjusted while the graduation part S is visually being checked.

Description

  The present invention relates to a printer that prints by transferring ink of an ink ribbon onto a recording medium by a printing unit.

  2. Description of the Related Art Conventionally, a thermal transfer type printer is known, and a head unit provided with a thermal head thermally transfers ink applied to an ink ribbon onto a recording medium such as a label or recording paper.

  When printing is performed by this thermal transfer, the recording medium and the ink ribbon pass while being pressed between the thermal head of the head unit and the platen roller in a state of being superimposed on each other. The recording medium and the ink ribbon are separated from each other after passing between the head unit and the platen roller, the recording medium is discharged to the outside, and the ink ribbon is wound up by the winding unit. .

  Conventionally, a guide member (peeling plate) that guides the separated ink ribbon in the direction of the take-up portion is provided at a portion where the recording medium and the ink ribbon are separated, and the lower edge of the guide member is attached to the ink ribbon. Is guided by sliding. The position of the guide member can be adjusted so that the guide direction of the ink ribbon can be adjusted.

  For example, Patent Document 1 discloses a structure in which elongated holes extending in the vertical direction are formed at both ends of a guide member, and these elongated holes are screwed to a bracket on the printer main body side. When the position of the guide member is adjusted, the screw is loosened and the guide member is moved within the elongated hole, and after the adjustment, the screw is tightened at the adjusted position.

  In Patent Document 2, a horizontal long hole is formed at one end of a guide member, and a crank-shaped oblique long hole is formed at the other end, and the horizontal long hole and the crank-shaped slanted long hole are supported by the print head. The thing screwed to the member is disclosed. Then, in the same manner as in Patent Document 1, the position adjustment of the guide member is performed by loosening the screw and moving the guide member within the horizontal long hole and the crank-shaped oblique long hole, and tightening the screw after the adjustment.

JP-A-5-301355 JP 2002-137513 A

  However, in such a conventional printer, in either of Patent Document 1 and Patent Document 2, when adjusting the position of the guide member, the screw is loosened and the vertical tilt position of the guide member is adjusted manually. After that, the screw is tightened again and fixed.

  However, when the guide member is adjusted by loosening the screw in this way, the guide member is adjusted up and down with the operator's sense. It becomes difficult.

  Therefore, in view of such a conventional problem, the present invention accurately and easily adjusts the position of the peeling plate that guides the ink ribbon that has passed between the printing unit and the platen roller in the direction of the winding unit. An object of the present invention is to provide a printer capable of performing the above.

According to a first aspect of the present invention, there is provided a printing unit disposed opposite to the platen roller, a ribbon supply path for supplying an ink ribbon between the printing unit and the platen roller, and between the printing unit and the platen roller. The ink ribbon and the recording medium are overlapped with each other and separated from each other after passing between the printing unit and the platen roller, and the ink ribbon is wound. A printer wound around a take-up unit, wherein a release plate that guides the ink ribbon toward the take-up unit is provided at a portion where the recording medium and the ink ribbon are separated. Both ends are attached to the head unit side via an eccentric pin so that the position of the head unit can be adjusted, and a scale portion for displaying the rotational position of the eccentric pin is provided on the peeling plate. It is characterized in.
According to a second means of the present invention, in the printer of the first means, the scale portion is provided in a peripheral portion of the eccentric pin, and the position where the amount of eccentricity becomes zero is the center, and the distance from the center increases. It is characterized by a large interval between the scales.
According to a third means of the present invention, in the printer of the first or second means, the release plate is adjusted in parallel with the printing unit or the platen roller.
According to a fourth means of the present invention, in the printer of the first or second means, the release plate is adjusted in parallel with a central axis of the winding portion.
According to a fifth means of the present invention, in the printer of any one of the first to fourth means, a head bracket fixed to the printing unit and an adjustment screwed to the head bracket so as to be tightened and loosened A plate, and integrally fixing the peeling plate to the adjustment plate with a default value, and providing the eccentric pin between the adjustment plate and the head bracket, and by rotating the eccentric pin. The release plate is displaced with respect to the head bracket together with the adjustment plate.

According to the first means of the present invention, the ink ribbon which has passed between the printing unit and the platen roller together with the recording medium is guided by the release plate provided at a portion where the recording medium and the ink ribbon are separated. However, it is guided toward the winding unit. At this time, since the peeling plate is attached to the head unit side via the eccentric pin so as to be adjustable in position, the peeling plate can be easily adjusted in position by rotating the eccentric pin. In addition, since the release plate is provided with a scale that displays the rotational position of the eccentric pin, the adjustment amount of the release plate can be visually confirmed, so that the position adjustment of the release plate can be performed accurately and easily. Can be done.
According to the second means of the present invention, in addition to the effects of the first means, the scale portion is provided in the peripheral portion of the eccentric pin, and the position where the eccentric amount is zero is the center, and from this center The distance between the scales is increased as the distance increases. Therefore, when the eccentric pin is rotated greatly to increase the position adjustment amount of the peeling plate, the peeling plate can be finely adjusted by a large scale interval. Thereby, even when the position adjustment amount of the peeling plate becomes large, the position of the peeling plate can be adjusted with higher accuracy.
According to the third means of the present invention, in addition to the effects of the first and second means, the separation plate is adjusted in parallel with the printing part or the platen roller, so that the space between the printing part and the platen roller is increased. It is possible to suppress wrinkles and deviations in the ink ribbon passing through As a result, printing on the recording medium can be made more beautiful, and ribbon jam in the printing unit can be suppressed.
According to the fourth means of the present invention, in addition to the effects of the first and second means, the release plate is adjusted in parallel with the central axis of the winding portion of the ink ribbon, whereby the ink ribbon is wound. When winding around the take-up portion, it is possible to suppress wrinkles and bias in the ink ribbon. As a result, the ink ribbon can be easily and neatly wound around the winding portion, and ribbon jamming at the winding portion can be suppressed.
According to the fifth means of the present invention, in addition to the first to fourth effects, the peeling plate is attached to the head bracket via the adjustment plate, and the adjustment plate is fastened to the head bracket. And screwed loosely. Further, the peeling plate is integrally fixed to the adjustment plate with a default value, and the eccentric pin is provided between the adjustment plate and the head bracket. Therefore, the position of the release plate can be adjusted together with the adjustment plate by loosening the screw of the adjustment plate and rotating the eccentric pin, and then the release plate is integrated with the adjustment plate by tightening the screw of the adjustment plate. Can be fixed to the head bracket. Thereby, since a peeling plate is fixed to a head bracket via the adjustment plate fixed integrally by default value, it can make it easier to adjust the position of a peeling plate.

FIG. 1 is a perspective view of a printer showing an embodiment of the present invention as seen from the downstream side surface of an ink ribbon in a state where an upper module is in a lowered position. FIG. 2 is a perspective view of the printer shown in FIG. 1 as seen from the upstream side surface of the ink ribbon when the upper module is in the lowered position. FIG. 3 is a perspective view of the upper module of the printer shown in FIG. FIG. 4 is a perspective view of the lower module of the printer shown in FIG. FIGS. 5A and 5B are separation mechanisms used in the printer shown in FIG. 1. FIG. 5A is a sectional view when the upper module is in the lowered position, and FIG. 5B is a sectional view when the upper module is in the raised position. 6 is an exploded perspective view of the separation mechanism shown in FIG. 7 is a perspective view of the printer shown in FIG. 1 as viewed from the upstream side of the ink ribbon when the upper module is in the raised position. FIG. 8 is an exploded perspective view of a mounting portion of a release plate used in the printer shown in FIG. FIG. 9 is a rear view of the attachment state of the release plate shown in FIG. 8 as viewed from the downstream side in the recording paper conveyance direction of the printer. FIG. 10 is a perspective view of the eccentric pin that supports the peeling plate shown in FIG. 8 as viewed from the head side. 11 is an end view of the eccentric pin shown in FIG. 10 viewed from the side opposite to the head. FIG. 12 is an explanatory diagram of the scale portion showing the rotational position of the eccentric pin.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the printer 1 of the present embodiment includes a head unit 2 as a printing unit disposed opposite to the platen roller 6, a ribbon mechanism 3 that supplies an ink ribbon 31 to the head unit 2, and a head The unit 2 includes a conveyance path 5 that conveys a roll-shaped or sheet-shaped recording paper 4 as a recording medium. Furthermore, a power supply unit that does not appear in the figure and a general printing control unit are provided. The head unit 2 is provided with a thermal head (not shown) at the lower end facing the platen roller 6, and printing is performed substantially by this thermal head. 1 and 2 show the inside with the casing omitted.

  Under the thermal head provided in the head unit 2, the platen roller 6 is disposed so as to face the ink ribbon 31 and the recording paper 4. Then, the ink ribbon 31 and the recording paper 4 are fed in a state of being overlapped between the thermal head of the head unit 2 and the platen roller 6. The ink ribbon 31 to be fed is positioned on the upper surface of the recording paper 4, and the print information is transferred to the recording paper 4 through the ink ribbon 31 by selectively generating heat from the heating element of the thermal head. At this time, the platen roller 6 serves to hold down the recording paper 4 printed by the head unit 2 from the lower side and pinch the recording paper 4 and the ink ribbon 31 between the thermal head.

  The ribbon mechanism 3 includes a supply reel 32 around which the ink ribbon 31 is wound, and a take-up reel 33 as a take-up portion that winds up the ink ribbon 31 that has passed through the head unit 2. As shown in FIGS. 1 and 3, the ink ribbon 31 supplied from the supply reel 32 is taken up by the take-up reel 33 after passing through the ribbon supply path 34.

  That is, the ink ribbon 31 has an inlet 35 (see FIGS. 1 and 2) formed between the guide plate 20 and the guide shaft 21, between the feed roller 22 and the receiving roller 23 (see FIG. 7), and the head. It passes between the thermal head of the unit 2 and the platen roller 6 in order. Thereafter, the ink ribbon 31 is wound around the take-up reel 33 while being guided by a guide shaft 24 (see FIG. 1) provided above the outlet portion of the head unit 2.

A transport driving mechanism 5 </ b> A for transporting the recording paper 4 along the transport path 5 is provided. The transport driving mechanism 5A is provided in a stable state on the lower module 1B on the fixed side with respect to the upper module 1A that moves up and down.
Further, the transport driving mechanism 5A sandwiches the recording paper 4 between the belt that does not appear in the drawing along the transport direction of the recording paper 4, the platen roller 6, the paper discharge roller 51, and the paper discharge roller 51. A support roller 52 and the like are provided.
Further, in the vicinity of the insertion port 54 (see FIG. 2) into which the recording paper 4 is inserted, a supply roller 56 and a support roller (not shown) for sandwiching the recording paper 4 between the supply roller 56 are arranged. . Then, the recording paper 4 is conveyed by the driving of the belt and the rotation of the supply roller 56, the platen roller 6, the paper discharge roller 51 and the support roller 52. At this time, the conveyance path 5 is a linear conveyance unit that conveys the recording paper 4 in a substantially horizontal direction perpendicular to the separation direction of the upper module 1A at least in a portion corresponding to the thermal head of the head unit 2. The horizontal conveyance part 53 is provided.

  The conveyance direction of the recording paper 4 is a direction a from the right side to the left side in the drawing, and the recording paper 4 inserted into the insertion port 54 (see FIG. 2) at the right end in the drawing is between the head unit 2 and the platen roller 6. Is sent to. When the recording paper 4 passes with the ink ribbon 31 between the head unit 2 and the platen roller 6, printing is performed with the ink of the ink ribbon 31, and then passes between the paper discharge roller 51 and the support roller 52. Then discharged.

  Therefore, in the printer 1 of the present embodiment, the ink ribbon 31 and the recording paper 4 are overlapped with each other and pass between the head unit 2 and the platen roller 6, and then separated from each other so that the recording paper 4 is removed from the outside. Then, the ink ribbon 31 is taken up on the take-up reel 33.

  At this time, a portion where the recording paper 4 and the ink ribbon 31 are separated, that is, in the vicinity of the rear side of the head unit 2, that is, in the vicinity of the downstream side with respect to the conveyance direction a of the recording paper 4, as shown in FIG. A peeling plate 200 serving as a guide member is provided. The release plate 200 guides the ink ribbon 31 that has passed between the head unit 2 and the platen roller 6 in a state of being superimposed on the recording paper 4, separated from the recording paper 4, that is, in the direction of the take-up reel 33. To do. At this time, the upper surface of the ink ribbon 31 is slid along the lower edge 200a (see FIG. 8) of the peeling plate 200. The detailed structure of the peeling plate 200 will be described later.

In the conveyance path 5, a paper width restriction guide 55 is provided on the insertion opening 54 side of the path start end, and the width position of the recording paper 4 is aligned by the paper width restriction guide 55.
Further, the control unit described above controls the head unit 2, the ribbon mechanism 3, and the transport drive mechanism 5A of the transport path 5, and the power supply unit supplies power to them.

As shown in FIG. 3, the printer 1 according to the present embodiment forms a top module 1A by modularizing a head unit 2 and a ribbon mechanism 3. Further, as shown in FIG. The lower module 1B is configured by modularizing the control unit. The upper module 1A and the lower module 1B can be separated in the vertical direction, and the upper module 1A is attached to the lower module 1B via the separation mechanism 100 so as to be vertically movable.
Further, the platen roller 6 facing the thermal head of the head unit 2 provided on the upper module 1A side is rotatably supported by the gantry 8B on the lower module 1B side. Further, the paper discharge roller 51 and the support roller 52 are also supported by the base 8B on the lower module 1B side.

  As shown in FIG. 5, the separation mechanism 100 includes a guide means 120 that guides the upper module 1A up and down in the up-and-down direction, which is the moving direction thereof, and a biasing means 130 that pushes the upper module 1A upward in the separating direction. And an L-shaped metal fitting 140 as an attachment member for attaching the guide means 120 to the upper module 1A.

  The guide means 120 and the biasing means 130 are held by a holder member 150 erected from the lower module 1B, and the upper module 1A is supported by the lower module 1B by the holder member 150.

  As shown in FIG. 2, the holder member 150 is disposed on one side of the head unit 2 (the other side in the present embodiment) on the upstream side and the downstream side in the conveyance direction a of the recording paper 4. Further, a pair of holder members 150 on the downstream side in the transport direction “a” are disposed so as to be symmetrical to each other in both side directions (the far side and the near side in the drawing) of the head unit 2. Accordingly, the upper module 1A is stably supported by the three holder members 150. 1 and 7, the holder member 150 (separation mechanism 100) on the near side is omitted.

  The holder member 150 is formed in a U-shaped cross section by the back wall 150a and the both side walls 150b, and a pair of fixing plates 151 are fixed to the upper and lower portions at an appropriate interval inside thereof.

  As shown in FIG. 6, the pair of fixed plates 151 are formed with bent pieces 151 a bent at one end arranged on the back side of the holder member 150, and the bent pieces 151 a are bent. A first protrusion 151b is provided on the part. Moreover, the 2nd protrusion part 151c is provided in the other end part both sides of the fixed plate 151, respectively.

  In addition, an insertion hole 150c for inserting the first protrusion 151b of the fixing plate 151 is formed in the back wall 150a of the holder member 150 formed in a U-shaped cross section, and in the open portions of the side walls 150b. A slit 150d for inserting the second protrusion 151c of the fixed plate 151 is formed.

  When the fixing plate 151 is fixed to the holder member 150, the first protrusion 151b is inserted into the insertion hole 150c while the bent piece 151a is in contact with the inner surface of the back wall 150a, and the second protrusion 151c is inserted into the slit 150d. At this time, as shown in FIG. 5, the bent piece 151 a is fixed to the holder member 150 with a screw 152. Further, the holder member 150 is provided with a flange 150e at the lower end portion, and the flange 150e is fixed to the base plate 7 of the lower module 1B with a screw (not shown).

  As shown in FIG. 6, the guide means 120 includes a guide shaft 121 fixed to a pair of fixing plates 151 fixed to the holder member 150, and a pair of upper and lower slides slidably fitted to the guide shaft 121. And a moving bush 122.

  The guide shaft 121 is disposed between the pair of fixed plates 151 in the vertical direction, and both upper and lower ends thereof are fixed to the respective fixed plates 151 by screws 123. The sliding bush 122 is provided with a mounting surface 124 that is coupled to the L-shaped metal fitting 140, and a plurality of protrusions 125 are provided on the mounting surface 124.

  As shown in FIG. 6, the urging means 130 includes a compression coil spring 131 and a support shaft 132 that is arranged in the vertical direction and is loosely fitted inside the compression coil spring 131. As shown in FIG. 5, the lower end portion of the support shaft 132 is slidably inserted into a bearing 133 attached to an opening 151 d formed in the lower fixing plate 151. On the other hand, the upper end portion of the support shaft 132 is passed through the opening 151 e formed in the upper fixed plate 151 together with the compression coil spring 131.

  The L-shaped metal fitting 140 includes a side plate 141 attached to the gantry 8A of the upper module 1A, and a top portion of the side plate 141 bent into a substantially L shape, ie, a pushing force (biasing force) of the urging means 130, ie, compression. And a top plate 142 to which the urging force of the coil spring 131 is transmitted. The side plate 141 extends in the vertical direction, the top plate 142 is disposed in a substantially horizontal direction, and the side plate 141 and the top plate 142 are substantially L-shaped.

  A plurality of through holes 143 are formed in the side plate 141, and the projections 125 provided on the mounting surface 124 of the sliding bush 122 are engaged with the through holes 143, so that the sliding bush 122, the side plate 141, Are joined together. Further, since the side plate 141 is attached to the mount 8A of the upper module 1A, the upper module 1A can be moved up and down by the sliding bush 122 moving along the guide shaft 121.

  On the other hand, the upper end of the support shaft 132 of the urging means 130 is fixed to the top plate 142 with screws 134. Thus, the compression coil spring 131 loosely fitted to the support shaft 132 is supported by the lower plate abutting against the bearing 133 and supported by the lower fixed plate 151, and the upper end abutting against the top plate 142. Accordingly, the urging force of the compression coil spring 131 is transmitted to the L-shaped metal fitting 140 via the top plate 142, and the upper module 1A to which the L-shaped metal fitting 140 is attached is pushed by the compression coil spring 131. The urging force in the raising direction acts.

  In the present embodiment, the compression coil spring 131 is used as a means for generating a pushing force (biasing force) by the urging means 130. However, as a means for generating the pushing force, other than this, for example, It may be an air cylinder or an oil cylinder.

  In the use state of the printer 1 shown in FIGS. 1 and 2, the upper module 1A is in the lowered position, and the compression coil spring 131 is in a compressed state as shown in FIG. At this time, the hook 9 is detachably provided across the upper module 1 </ b> A and the lower module 1 </ b> B, and the lowered position of the separation mechanism 100 is held in the locked state of the hook 9. Yes. In the upper module 1A, the lowered position is the reference position, and the raised position is the separation position.

  The hook 9 is urged in the locking direction by a spring (not shown), and an inclined surface 92 is formed at the tip. As a result, when the upper module 1A is lowered, the hook 9 is once rotated in the releasing direction b while the inclined surface 92 is in contact with the shaft portion of the platen roller 6, and the inclined surface 92 is rotated by the shaft portion of the platen roller 6. At the time of overcoming, the spring is biased in the reverse direction to the release direction b by the urging force of the spring and locked. At this time, the shaft portion of the platen roller 6 is formed of a round bar made of metal such as stainless steel, and a rubber portion integrally provided on the outer periphery of the shaft portion is in contact with the recording paper 4.

  As shown in FIG. 3, a pair of hooks 9 are provided on both sides of the head unit 2, and the pair of hooks 9 are fixed in the rotational direction at both ends of the rotating shaft 10 disposed above the head unit 2. Is done. In addition, the hooks 9 are interlocked with each other via a rotating shaft 10, and the rotating shaft 10 is supported on the upper module 1A side.

A hook portion 91 is formed at the lower end portion of the hook 9, and as shown in FIGS. 1 and 2, the hook portion 91 has both longitudinal ends of the shaft portion of the platen roller 6 at the lowered position of the upper module 1 </ b> A. It is locked to the part.
Then, by manually rotating the hook 9 in the counterclockwise direction b in FIG. 1 against the urging force of the spring, the hook 91 is detached from the platen roller 6 and the locked state is released. . In the figure, reference numeral 93 denotes an operation unit for rotating the hook 9.

  Then, when the hook 9 is unlocked in this way, the biasing means 130 has a compression coil spring 131 in a compressed state as shown in FIG. 5 (a), as shown in FIG. 5 (b). The upper module 1A can be lifted by the biasing force.

  Further, as shown in FIG. 3, a U-shape that engages with the shaft portion of the platen roller 6 from above at the lowered position of the upper module 1A is formed inside the pair of hooks 9 (center side of the head unit 2). A shaped member 11 is provided. The U-shaped member 11 is fixed or integrally provided on the side plate 2S of the head unit 2. Thereby, when the upper module 1A is lowered, the U-shaped member 11 is engaged with the platen roller 6 so that the relative position between the head unit 2 and the platen roller 6 can be maintained with high accuracy.

  Here, the structure of the peeling plate 200 described above will be described in detail with reference to FIGS. As shown in FIG. 8, the peeling plate 200 is attached to a head bracket 220 on the head unit 2 side via an adjustment plate 210. The head bracket 220 is forward in plan view, that is, upstream in the transport direction a, by the mounting surface 221 of the peeling plate 200 and the support units 222 and 223 of the head unit 2 disposed at both ends of the mounting surface 221. It has a substantially U shape with the side open.

  The head bracket 220 has support portions 222 and 223 coupled to the head unit 2, and the head unit 2 and the head bracket 220 have an integral structure.

  The peeling plate 200 has a plate-like main body surface 201 having a length L1 larger than the width of the ink ribbon 31 and a predetermined width W1 in the height direction, and a lower end portion of the main body surface 201 on the upstream side in the transport direction a. It is formed in a substantially L-shaped cross section by a bent piece 202 bent to the right (in the drawing). And the corner | angular part of the main body surface 201 and the bending piece 202 becomes the lower edge 200a which guides upwards, sliding the ink ribbon 31. FIG. Further, notches 203 for arranging an adjusting screw 212 described later are formed at both upper ends of the main body surface 201.

  The adjustment plate 210 has a predetermined length L2 and a predetermined width W2 in the height direction, and is formed in a short shape. The length L2 and the width W2 of the adjustment plate 210 are substantially equal to the length L1 and the width W1 of the peeling plate 200. At this time, the head bracket 220 has an attachment surface 221 to which the adjustment plate 210 is attached, and the attachment surface 221 has an area including at least the adjustment plate 210.

  Here, in this embodiment, the position of the peeling plate 200 can be adjusted to the head bracket 220 via the eccentric pin 230, and the scale portion S that displays the rotational position of the eccentric pin 230 is provided on the peeling plate 200. It is provided. The position adjustment in this case means adjustment of the peeling plate 200 in the vertical direction and the inclination direction. Specifically, as shown in FIG. 9, the specific attachment structure of the peeling plate 200 is that the adjustment plate 210 is attached to the left and right ends of the attachment surface 221 of the head bracket 220 by a pair of adjustment screws 212. The adjustment screw 212 is located in the notch 203 of the peeling plate 200 and can be tightened and loosened with respect to the head bracket 220.

  On the other hand, the peeling plate 200 is fixed to the left and right ends of the adjustment plate 210 by a pair of fixing screws 204 as a default value. The fixing screw 204 does not need to be loosened after fixing the peeling plate 200 to the adjustment plate 210 with a default value, and the peeling plate 200 and the adjustment plate 210 are integrated after the initial setting.

  A pair of left and right eccentric pins 230 are provided between the integrated peeling plate 200 and adjustment plate 210 and the head bracket 220. By rotating the eccentric pin 230 with a jig (not shown), the adjustment plate 210 can be displaced with respect to the head bracket 220 together with the peeling plate 200.

  As shown in FIG. 10, the eccentric pin 230 has a large-diameter head portion 231 and an eccentric shaft portion 232 having a smaller diameter than the head portion 231, and as shown in FIG. The rotation center axis C1 of the part 231 and the rotation axis part C2 of the eccentric shaft part 232 are eccentric to each other. Further, a groove 233 into which a jig such as a minus driver is inserted is formed at the tip of the head 231.

  The head 231 of each eccentric pin 230 is closely fitted in a pair of left and right large-diameter holes 211 formed in the adjustment plate 210 so as to be relatively rotatable. On the other hand, each eccentric shaft portion 232 is closely fitted in a pair of left and right small-diameter holes 224 formed on the mounting surface 221 of the head bracket 220 so as to be relatively rotatable.

  The release plate 200 is formed with a pair of left and right operation ports 205 having an area including at least the large-diameter hole 211 at a position corresponding to the large-diameter hole 211 of the adjustment plate 210. The head 231 is exposed. In the present embodiment, the operation port 205 is formed in an elliptical shape extending in the left-right direction, as shown in FIG.

  By the way, in this embodiment, as shown in FIG. 11, the eccentric amount d of the eccentric pin 230 is about 1 mm, and by rotating the head 231, about 1 mm with respect to the eccentric shaft portion 232. Can be obtained. Therefore, a pair of eccentric pins 230 existing at both ends of the peeling plate 200 can be adjusted in position by about 1 mm in the vertical direction with the eccentric pins 230. Thereby, when the eccentric pins 230 at both ends are eccentric in the upside down direction, the peeling plate 200 can generate an eccentric difference of about 2 mm at the maximum in the inclined direction. Of course, the adjustment angle in the inclination direction of the peeling plate 200 is determined by the distance between the pair of eccentric pins 230.

  At this time, the peeling plate 200 is preferably adjusted in parallel with the thermal head of the head unit 2 or the platen roller 6, and is also preferably adjusted in parallel with the central axis of the take-up reel 33. .

  As shown in FIG. 12, the scale portion S that displays the rotational position of the eccentric pin 230 is formed around the operation port 205 of the peeling plate 200, and an initial position Sa <b> 0 where the eccentricity amount becomes zero is disposed above. The At this time, a mark 234 for alignment is attached to the tip surface of the head portion 231 of the eccentric pin 230, and this mark 234 coincides with the initial position Sa0 of the eccentric pin 230. ing. In a state where the mark 234 coincides with the initial position Sa0, the eccentric directions of the centers C1 and C2 of the head portion 231 and the eccentric shaft portion 232 are the left and right directions, as shown in FIG.

  The scale portion S is arranged with the initial position Sa0 of the eccentric amount disposed above being set to 0 mm, and the value of the scale Sa in which the absolute value of the eccentric amount increases with the initial position Sa0 being centered. It is. In the present embodiment, the right side eccentricity is 0 to +1.0 mm, and the left side eccentricity is 0 to −1.0 mm.

  In the present embodiment, as shown in FIG. 12, the scale Sa that is distributed to the left and right by arranging the scale Sa of the scale portion S along the outer periphery of a substantially semi-ellipse whose major axis is the left-right direction, As the distance from the center initial position Sa0 increases, the interval P increases.

  Next, functions of the printer 1 of the present embodiment will be described below. When the recording paper 4 is fed into the conveyance path 5, the recording paper 4 passes between the head unit 2 and the platen roller 6, overlaps with the ink ribbon 31 fed from the supply reel 32, and is printed. Thereafter, the recording paper 4 and the ink ribbon 31 that have passed between the head unit 2 and the platen roller 6 in an overlapped state are in the vicinity of the rear side of the head unit 2, that is, in the transport direction a of the recording paper 4 of the head unit 2. Separation in the vicinity of the downstream side. The recording paper 4 thus separated is discharged from between the paper discharge roller 51 and the support roller 52, and the ink ribbon 31 is taken up by the take-up reel 33. The recording medium may be a label other than the recording paper 4 or may be formed of a printable material other than paper.

  In the present embodiment, since the peeling plate 200 is provided in the vicinity of the rear side of the head unit 2, the ink ribbon 31 that has passed between the head unit 2 and the platen roller 6 and separated from the recording paper 4 is peeled off. It is guided to the take-up reel 33 while sliding on the lower edge 200a of the plate 200. At this time, the position of the peeling plate 200 can be adjusted by the rotation of the eccentric pin 230, and the direction in which the ink ribbon 31 is guided can be finely adjusted by adjusting the position of the peeling plate 200.

  In this way, by adjusting the position of the peeling plate 200, the transport direction of the ink ribbon 31 passing between the head unit 2 and the platen roller 6 and the feed direction of the ink ribbon 31 reaching the take-up reel 33 are finely adjusted. it can.

  Accordingly, by adjusting the peeling plate 200 in parallel with the thermal head of the head unit 2 or the platen roller 6, wrinkles are generated when the ink ribbon 31 passes between the head unit 2 and the platen roller 6. Can be suppressed. Further, by adjusting the peeling plate 200 in parallel with the central axis of the take-up reel 33, it is possible to prevent wrinkles from being generated on the ink ribbon 31 when the ink ribbon 31 is taken up by the take-up reel 33. it can.

  In order to adjust the position of the peeling plate 200, first, the head 231 of the eccentric pin 230 is rotated with a jig while the adjustment screw 212 is loosened with the jig. Then, the head portion 231 of the eccentric pin 230 rotates around the eccentric shaft portion 232 fitted in the small diameter hole 224 of the head bracket 220 to displace the center C1 position, and the adjustment plate 210 is moved to the head bracket 220. Can be moved.

  At this time, since the peeling plate 200 is fixed to the adjustment plate 210 by the fixing screw 204, the peeling plate 200 is displaced together with the adjustment plate 210, and as a result, the position of the peeling plate 200 with respect to the head bracket 220 can be adjusted. After the position adjustment of the peeling plate 200 is completed, the adjustment plate 210 is fixed to the head bracket 220 by tightening the adjustment screw 212 with a jig.

  The position adjustment amount of the peeling plate 200 is determined by the rotation amount (rotation angle) of the head portion 231 of the eccentric pin 230, and the rotation amount of the head portion 231 is a scale portion S provided on the peeling plate 200. Can be confirmed. Accordingly, the amount of movement of the peeling plate 200 can be visually confirmed without depending on the operator's sense, and the position of the peeling plate 200 is adjusted with high accuracy.

  As described above, according to the printer 1 of the present embodiment, the separation plate 200 is provided at the separation portion of the recording medium 4 and the ink ribbon 31 that have passed between the head unit 2 and the platen roller 6 in an overlapped state. It has been. The peeling plate 200 is attached to the head bracket 220 by an eccentric pin 230 so that the position thereof can be adjusted.

  Therefore, the position of the peeling plate 200 can be easily adjusted by rotating the eccentric pin 230. In addition, since the release plate 200 is provided with a scale portion S that displays the rotational position of the eccentric pin 230, the adjustment amount of the release plate 200 can be visually confirmed by the scale portion S. Thereby, the position adjustment of the peeling plate 200 can be performed accurately and easily.

  Further, according to the present embodiment, the scale portion S is provided in the peripheral portion of the eccentric pin 230, and the scale Sa is centered on the initial position Sa0 where the amount of eccentricity becomes zero and moves away from the initial position Sa0 of the center. The interval P is increased. Therefore, when the eccentric pin 230 is rotated greatly to increase the position adjustment amount of the peeling plate 200, the peeling plate 200 can be finely adjusted by the large interval P of the scale Sa. Thereby, even when the position adjustment amount of the peeling plate 200 becomes large, the position of the peeling plate 200 can be adjusted with higher accuracy.

  Further, according to the present embodiment, the peeling plate 200 is adjusted in parallel with the thermal head of the head unit 2 or the platen roller 6, so that the ink ribbon 31 passing between the head unit 2 and the platen roller 6 can be removed. And the occurrence of bias can be suppressed. Thereby, the printing on the recording paper 4 can be made more beautiful, and the ribbon jam between the head unit 2 and the platen roller 6 can be suppressed.

  Further, according to the present embodiment, when the ink ribbon 31 is wound around the take-up reel 33 by adjusting the peeling plate 200 in parallel with the central axis of the take-up reel 33 of the ink ribbon 31, the ink ribbon 31. It is possible to prevent wrinkles and bias from occurring. Thereby, it becomes easy to orderly wind the ink ribbon 31 around the take-up reel 33, and ribbon jam at the take-up portion can be suppressed.

  Furthermore, according to the present embodiment, the peeling plate 200 is attached to the head bracket via the adjustment plate 210, and the adjustment plate 210 is provided with the adjustment screw 212 that can be tightened and loosened to the head bracket. Fixed. Further, the peeling plate 200 is integrally fixed to the adjustment plate 210 with a default value by a fixing screw 204, and the eccentric pin 230 is provided between the adjustment plate 210 and the head bracket 220.

  Therefore, the position of the adjustment plate 210 can be adjusted together with the peeling plate 200 by loosening the adjustment screw 212 of the adjustment plate 210 and rotating the eccentric pin 230. Thereafter, by tightening the adjustment screw 212, the integrated peeling plate 200 and adjustment plate 210 can be fixed to the head bracket 220. As a result, the adjustment plate 210 that integrally fixes the peeling plate 200 with the default value is movably fixed to the head bracket 220, so that the position adjustment of the peeling plate 200 can be performed more easily.

  The preferred embodiment of the present invention has been described in detail above. However, the present invention is not limited to this embodiment, and various modifications can be made without departing from the scope of the present invention. Further, the present invention can be applied to any printer that can print on a recording medium using the ink ribbon 31.

1 Printer 2 Head unit (printing unit)
31 Ink ribbon 31
33 Winding reel (winding part)
34 Ribbon supply path 4 Recording paper (recording medium)
5 Conveyance path 6 Platen roller 200 Release plate 210 Adjustment plate 220 Head bracket 230 Eccentric pin S Scale part Sa Scale P Scale interval

Claims (5)

A printing unit disposed opposite to the platen roller, a ribbon supply path for supplying an ink ribbon between the printing unit and the platen roller, and a conveyance path for conveying a recording medium between the printing unit and the platen roller. With
The ink ribbon and the recording medium are overlapped with each other and separated after passing between the printing unit and the platen roller, and the ink ribbon is wound up by a winding unit,
In a printer provided with a release plate that guides the ink ribbon toward the take-up portion in a portion where the recording medium and the ink ribbon are separated,
A printer characterized in that the release plate is attached to the head unit side via an eccentric pin so that the position of the release plate can be adjusted, and a scale portion for displaying the rotational position of the eccentric pin is provided on the release plate.   2. The scale according to claim 1, wherein the scale portion is provided in a peripheral portion of the eccentric pin, the center of the position where the amount of eccentricity becomes zero, and the interval between the scales increases as the distance from the center increases. Printer.   The printer according to claim 1, wherein the release plate is adjusted in parallel with the printing unit or the platen roller.   The printer according to claim 1, wherein the release plate is adjusted in parallel with a central axis of the winding unit.   A head bracket that is fixed to the print unit, and an adjustment plate that is screwed to the head bracket so as to be tightened and loosened, and the release plate is integrally fixed to the adjustment plate by a default value; and The eccentric pin is provided between the adjustment plate and the head bracket, and the peeling plate is displaced with respect to the head bracket together with the adjustment plate by rotation of the eccentric pin. The printer according to any one of 1 to 4.

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