JP2014113697A - Sheet winding mechanism and printer including sheet winding mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet winding mechanism capable of detaching a wound sheet by a simple operation and facilitating an operation for winding a new sheet, and a printer including the sheet winding mechanism.SOLUTION: A mount board winding mechanism 14 includes: a winding shaft 40 rotatably coupled to a drive unit, and winding a long sheet into a roll shape; a lever 60 slidable along the winding shaft 40, and including a catch 64 for drawing out the sheet wound by the winding shaft 40 toward an open end of the winding shaft 40; and detachment prevention member 68 preventing the lever 60 from detaching from the winding shaft 40 when the lever 60 is drawn out to the open end of the winding shaft 40.

Description

  The present invention relates to a label printer, a sheet winding mechanism that winds up a mount after the label is peeled off, an ink ribbon, and the like, and a printer that includes the sheet winding mechanism.

  2. Description of the Related Art Conventionally, in a label printer that uses a continuous body on which a long mount on which a label is temporarily attached is wound, the mount is wound around a winding shaft for the purpose of accommodating the mount after the label is peeled off. . When printing is completed, the wound mount is removed from the take-up shaft and discarded.

  However, since the mount is wound around the take-up shaft, it may be difficult to remove the mount from the take-up shaft.

  Therefore, in Patent Document 1, in order to easily remove the mount from the take-up shaft, the mount is held by a clamp that is detachably attached to the clamp holding portion of the mount holder, and is provided at one end of the clamp when the mount is recovered. It is described that the mount hooked on the mount hooking portion provided at the other end of the clamp is pulled out from the mount holder together with the clamp by grasping the gripping portion and pulling out the clamp.

Japanese Utility Model Publication No. 5-26418

  However, in the method described in Patent Document 1, when the mount is taken out, the clamp is completely pulled out from the mount holder. Therefore, when winding a new mount, the clamp must be returned to the clamp holder, and the work becomes complicated. Moreover, there was a risk of losing the clamp.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet winding mechanism that can remove a wound sheet with a simple operation and that facilitates the operation when winding a new sheet, and a printer having the sheet winding mechanism. And

The sheet winding mechanism according to the first aspect of the present invention is connected to a drive unit and is rotatable, and can wind along a winding shaft for winding a long sheet into a roll shape, and slide along the winding shaft. And a lever having a locking claw for pulling out the sheet wound around the winding shaft to the open end side of the winding shaft, and when the lever is pulled out to the open end side of the winding shaft And a disengagement preventing member for preventing the lever from coming off from the take-up shaft.
In the sheet winding mechanism according to the second aspect of the present invention, the lever includes a positioning member, the winding shaft includes two positioning grooves that engage with the positioning member, and the two positioning grooves. One of the two is formed at a position where the lever is pulled out to the open end side of the winding shaft, and the other of the two positioning grooves maintains the state where the lever is pushed into the drive unit side. It is formed in the position to do.
In the sheet winding mechanism according to the third aspect of the present invention, the lever is positioned on the inner side of the outer peripheral surface of the winding shaft except for the locking claw.
The sheet winding mechanism according to a fourth aspect of the present invention includes a bearing holder on the drive unit side in the winding shaft, and the disengagement prevention member is in the state where the lever is pushed into the drive unit side. Contact the bearing holder.
In a sheet winding mechanism according to a fifth aspect of the present invention, the lever includes a slide guide that guides the lever in a winding shaft direction when sliding along the winding shaft, and a wider width than the lever slide guide. And a disengagement prevention member having a flange portion protruding further in the width direction at an upper portion thereof, and the winding shaft is slightly wider than the width of the lever slide guide and is wider than the width of the disengagement prevention member. A slit having a first region having a narrow slit width and a second region having a slit width that is slightly larger than a width of the detachment preventing member and narrower than a width of the flange portion, and a slit between the first region and the second region A step is formed which is formed by a difference in width and prevents the lever from coming out of the take-up shaft by coming into contact with the detachment preventing member.
A printer according to a sixth aspect of the present invention includes the above-described sheet winding mechanism.

  According to the first aspect, since the disengagement preventing member is provided, it is possible to prevent the lever from coming off from the winding shaft.

  According to the second aspect, by engaging the positioning member of the lever and one of the two positioning grooves, the lever is pulled out to the open end side of the winding shaft, or the lever is moved to the drive unit side. The pushed state can be maintained.

  According to the third aspect, since the lever is positioned inside the outer peripheral surface of the winding shaft except for the locking claw, the wound mount and the lever are not in contact except for the locking claw. Therefore, the lever can be easily pulled out along the groove of the winding shaft.

  According to the fourth aspect, since the disengagement preventing member comes into contact with the bearing holder, the position of the lever can be regulated.

  According to the fifth aspect, the detachment prevention member having the flange portion provided in the lever slide guide and the slit having the first region and the second region having different slit widths provided in the winding shaft are simplified. With this configuration, it is possible to prevent the lever from coming out of the winding shaft.

  According to the sixth aspect of the present invention, it is possible to obtain a printer in which the wound sheet can be removed by a simple operation and the operation for winding a new sheet is easy.

The perspective view of a label printer. The perspective view of the label printer of the state which open | released the opening / closing cover. The side view of the label printer of the state which open | released the opening / closing cover. The exploded perspective view of a mount winding mechanism. The top view of a winding shaft. The perspective view which shows the state which attached the lever to the winding shaft and made it slide. Sectional drawing which shows the state which pressed the lever against the winding shaft. Sectional drawing which shows the state which pulled out the lever from the winding shaft. Sectional drawing which shows the state at the time of attaching a lever to a winding shaft.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present invention will be described by the following preferred embodiments, but can be modified in many ways without departing from the scope of the present invention, and other embodiments than the present embodiment are utilized. be able to. Accordingly, all modifications within the scope of the present invention are included in the claims.

  Hereinafter, preferred embodiments according to the present invention will be described with reference to FIGS.

  FIG. 1 is an external view of a label printer. FIG. 2 is a perspective view of the label printer with the opening / closing cover opened. FIG. 3 is a side view of the label printer with the opening / closing cover opened.

  The label printer 1 includes a printer main body 2 and an opening / closing cover 4 that is integral from the right side surface to the upper surface of the printer main body 2 and that can be opened and closed about a hinge provided on the upper surface side. Outside the label printer 1, a liquid crystal monitor 6 for displaying information about the label printer 1 such as an error, an operation panel 8 for operating the label printer 1, and a label for taking out the printed label An issue port 10 is provided. Although not shown in FIG. 1, the label printer 1 is connected to a printer cable so as to capture data from a separate personal computer (PC), and print data from the PC is transmitted online. The label is printed and issued.

  FIG. 2 is a perspective view of the label printer 1 with the opening / closing cover 4 opened. The printer main body 2 mainly includes a label supply shaft 12, a mount winding mechanism 14, a ribbon supply shaft 16, a ribbon winding shaft 18, a printing mechanism 20, a label peeling mechanism 22, a head opening / closing lever 24, and the like. Is composed of.

  The label supply shaft 12 holds and feeds a continuous label body in which a label is temporarily attached to a mount in a roll shape. The mount take-up mechanism 14 as the sheet take-up mechanism takes up the mount from which the label fed from the label supply shaft 12 is peeled off. The mount winding mechanism 14 will be described later.

  The ribbon supply shaft 16 holds and feeds a belt-like carbon ribbon in a roll shape. The ribbon take-up shaft 18 is a shaft for taking up the carbon ribbon fed from the ribbon supply shaft 16.

  As shown in FIG. 3, the printing mechanism 20 includes a platen roller 26 and a print head (thermal head) 28. The label continuum L and the carbon ribbon R are conveyed by the rotation of the platen roller 26, and a print information signal is supplied to the print head 28 to print predetermined print information on the label. The printed label continuum L is conveyed to the label peeling mechanism 22. By operating the head opening / closing lever 24, the print head 28 can be contacted / separated (opened / closed) with respect to the platen roller 26.

  The label peeling mechanism 22 includes a label peeling plate 30 and a peeling roller 32 downstream of the printing mechanism 20 in the label conveyance direction. The label peeling plate 30 bends the path of the mount M of the label continuous body at an acute angle between the printing mechanism 20 and the mount winding mechanism 14 described later. The peeling roller 32 is driven to rotate with respect to the platen roller 26, and the mount M is nipped by the peeling roller 32 and the platen roller 26. The tension pulling downstream by the peeling roller 32 and the platen roller 26 is applied to the mount M. As a result, the label is peeled off from the mount M by its own rigidity.

  The mount M is taken up by the mount take-up mechanism 14, and the mount M is discarded when the take-up is completed.

  Next, the mount winding mechanism 14 of the present embodiment will be described with reference to FIGS. FIG. 4 is an exploded perspective view of the mount winding mechanism 14. The mount winding mechanism 14 includes a winding shaft 40 and a lever 60. The winding shaft 40 includes a flange 42 on the side connected to the drive unit of the winding shaft 40, that is, on the base side (support end side). Two grooves 46 are formed on the outer peripheral surface 44 of the winding shaft 40 at positions facing each other in parallel with the axial direction of the winding shaft 40. A slit 48 is formed in the bottom surface 50 of the groove 46 in the direction opposite to the drive unit side, that is, on the open end side of the winding shaft 40.

  The lever 60 is integrally formed by leg portions 60A arranged opposite to each other in parallel and a connecting portion 60B for connecting the leg portions 60A. The lever 60 has a U-shape (or a U-shape) as a whole. ing. A locking claw 64 is formed at the end of each leg 60A. The locking claw 64 is substantially parallel to the leg portion 60A, and the locking claw 64 has a shape in which the leg portion 60A is folded.

  The lever 60 is formed with a lever slide guide 66, which is a narrow upright wall, along a U-shaped inner periphery.

  A disengagement prevention member 68 is formed at the end of the lever slide guide 66. The disengagement prevention member 68 is provided with a flange 70 that is wider than the lever slide guide 66 and further protrudes in the width direction at the upper part thereof. When the lever slide guide 66 is inserted into the slit 48 of the winding shaft 40, the flange portion 70 comes into contact with the bottom surface 50 from the inside of the winding shaft 40. By bringing the flange portion 70 into contact with the bottom surface 50, it is possible to prevent the lever 60 from being detached from the winding shaft 40. The lever 60 includes a positioning member 72 that is a protrusion between the disengagement prevention member 68 and the end of the leg 60A.

  FIG. 5 is a top view of the winding shaft 40. A groove 46 is formed on the outer peripheral surface 44 of the winding shaft 40. A slit 48 is formed on the bottom surface 50 of the groove 46 from the open end side of the winding shaft 40 toward the flange 42. The slit 48 includes a first region 48A having a narrow slit width from the open end side of the winding shaft 40, and then a second region 48B having a wider slit width than the first region 48A, and a third region having the widest slit width. It is connected to 48C. The first region 48 </ b> A has a slit width that is slightly wider than the width of the lever slide guide 66 of the lever 60 and narrower than the width of the disengagement prevention member 68. The second region 48 </ b> B has a slit width that is slightly wider than the width of the detachment preventing member 68 and narrower than the width of the flange 70. The third region 48 </ b> C has a slit width that is slightly wider than the width of the flange portion 70 of the detachment preventing member 68. On the bottom surface 50 of the groove 46, a step 56 is formed at the boundary between the first region 48A and the second region 48B due to the difference in slit width.

  When the lever 60 is assembled to the take-up shaft 40, the distance between the leg portions 60A and 60A is increased by the elasticity of the lever 60, the disengagement preventing member 68 is inserted into the third region 48C, and the lever slide guide 66 is moved. It inserts in the 1st field 48A and the 2nd field 48B.

  Two positioning grooves 52, 54 orthogonal to the slit 48 are formed on the bottom surface 50. One of the positioning grooves 52 and 54 and the positioning member 72 of the lever 60 are engaged, and the position of the lever 60 with respect to the winding shaft 40 can be fixed.

  FIG. 6 is a perspective view showing a state in which the lever 60 is pushed into the winding shaft 40 and a state in which the lever 60 is pulled out from the winding shaft 40. FIG. 6A shows a state where the lever 60 is pushed into the base side of the winding shaft 40. This is the state when the mount is wound by the mount winding mechanism 14. The lever 60 is positioned inside the outer peripheral surface 44 of the winding shaft 40 except for the locking claw 64, and the locking claw 64 is positioned outside the outer peripheral surface 44. Further, as shown in FIG. 6A, the connecting portion 60B is positioned at a predetermined distance from the open end of the take-up shaft 40 in a state where the lever 60 is pushed into the base side (support end side) of the take-up shaft 40. A space is formed between the open end of the winding shaft 40 and the connecting portion 60 </ b> B of the lever 60. This space is used as a space when a finger is put in and the lever 60 is pulled out.

  A method for winding the mount M will be described. First, the lever 60 is pushed into the base side of the take-up shaft 40, and then the mount M is sandwiched between the locking claws 64. The winding shaft 40 is rotated by a drive unit (not shown) to wind the mount M around the winding shaft 40. When the winding shaft 40 is rotated to wind the mount M, the positioning member 72 of the lever 60 and the positioning groove 54 of the winding shaft 40 are arranged so that the lever 60 does not slide to the open end side of the winding shaft 40. The state of being locked and pushed into the drive part side of the lever 60 is maintained. Therefore, the lever 60 is fixed to the take-up shaft 40, and the mount M can be taken up stably.

  FIG. 6B is a perspective view showing a state in which the lever 60 is pulled out from the winding shaft 40. When the winding of the mount M is completed, the lever 60 is pulled out to the open end side of the take-up shaft 40 in order to remove the taken mount M from the take-up shaft 40. Since the lever 60 is located inside the outer peripheral surface 44 of the winding shaft 40 except for the locking claw 64, the wound mount M and the lever 60 are not in contact except for the locking claw 64. Accordingly, since there is almost no contact resistance between the mount M and the lever 60, the lever 60 can be easily pulled out along the groove 46 of the winding shaft 40.

  When the lever 60 is pulled out to the open end side of the winding shaft 40, the lever slide guide 66 is slid while being guided by the slit 48. Since the detachment preventing member 68 of the lever 60 is wider than the slit width of the first region 48 </ b> A, the detachment preventing member 68 finally contacts the step 56. Thereby, the maximum position when the lever 60 is pulled out is determined, and the lever 60 can be prevented from being completely pulled out from the winding shaft 40.

  Further, when the disengagement preventing member 68 is brought into contact with the step 56, the positioning member 72 of the lever 60 and the positioning groove 52 of the winding shaft 40 are engaged. The state in which the lever 60 is pulled out in the direction opposite to the drive unit side, that is, the open end side of the winding shaft 40 is maintained, and the lever 60 is fixed to the winding shaft 40. When the mount M is removed from the lever 60 by the engagement between the positioning member 72 and the positioning groove 52, the lever 60 can be prevented from moving.

  FIG. 7 is a cross-sectional view showing a state where the lever 60 is pressed against the winding shaft 40. This corresponds to the state of FIG. However, the lever slide guide 66 is not shown for easy understanding. A space is formed at the base of the winding shaft 40, and a bearing holder 80 is inserted into this space. When the lever 60 is pushed into the base portion (support end side) of the winding shaft 40, the disengagement prevention member 68 is brought into contact with the bearing holder 80. By contacting the bearing holder 80, the lever 60 is prevented from being further slid toward the root portion (support end side) of the winding shaft 40. Further, the positioning member 72 of the lever 60 is engaged with the positioning groove 54, and the lever 60 is fixed to the winding shaft 40.

  When the bearing holder 80 is inserted into the take-up shaft 40, the disengagement prevention member 68 contacts the bearing holder 80, so that the lever 60 cannot be pushed further. The detachment prevention member 68 is not moved to the third region 48C and is retained in the second region 48B. Since the width of the flange portion 70 of the detachment preventing member 68 is wider than the slit width of the second region 48B, the detachment preventing member 68 does not come out of the second region 48B. As long as the bearing holder 80 is inserted into the winding shaft 40, the lever 60 cannot be removed from the winding shaft 40.

  FIG. 8 is a cross-sectional view showing a state in which the lever 60 is pulled out from the winding shaft 40. This corresponds to the state of FIG. When the lever 60 is pulled out from the winding shaft 40, the disengagement prevention member 68 is brought into contact with the step 56. The step 56 restricts the maximum movement position (maximum pull-out position) of the lever 60 toward the open end of the winding shaft 40, and the step 56 prevents the lever 60 from being slid toward the first region 48 </ b> A side of the winding shaft 40. Suppress. That is, the lever 60 is prevented from coming off the winding shaft 40.

  FIG. 9 is a cross-sectional view showing a state when the lever 60 is detached from the winding shaft 40. When the bearing holder 80 is not inserted into the winding shaft 40, the lever 60 can be further pushed in by utilizing the space between the open end of the winding shaft 40 and the connecting portion 60 </ b> B of the lever 60. The detachment preventing member 68 is inserted into the third region 48C. Since the slit width of the third region 48C is wider than the width of the flange portion 70 of the detachment prevention member 68, the detachment prevention member 68 and the ridge portion 70 can be removed from the third region 48CB. If the bearing holder 80 is not inserted into the winding shaft 40, the lever 60 can be freely detached from the winding shaft 40.

  In the present embodiment, the wound mount M can be removed with a simple operation, while the lever 60 is not removed from the take-up shaft 40. Therefore, it becomes easy to remove the mount after winding or set the mount when newly winding.

  In the present embodiment, as the sheet winding mechanism, the mount winding mechanism 14 that winds the mount has been described. However, the present invention is not limited to this. For example, the present invention may be employed in a ribbon take-up shaft that takes up a long ribbon ink ribbon that prints on a label by transferring ink.

DESCRIPTION OF SYMBOLS 14 ... Mount winding mechanism, 40 ... Winding shaft, 44 ... Outer peripheral surface, 46 ... Groove, 48 ... Slit, 50 ... Bottom, 52, 54 ... Positioning groove, 60 ... Lever, 64 ... Locking claw, 66 ... Lever Slide guide, 68 ... detachment prevention member, 72 ... positioning member

Claims (6)

A winding shaft that is connected to the drive unit and is rotatable, and winds a long sheet into a roll; and
A lever that is slidable along the winding shaft and has a locking claw for pulling out the sheet wound around the winding shaft to the open end side of the winding shaft;
A detachment preventing member for preventing the lever from coming off from the take-up shaft when the lever is pulled out to the open end side of the take-up shaft;
A sheet take-up mechanism comprising:   The lever has a positioning member, the winding shaft has two positioning grooves that engage with the positioning member, and one of the two positioning grooves has an opening end side of the winding shaft. 2. The sheet winding according to claim 1, wherein the other end of the two positioning grooves is formed at a position where the lever is pushed into the drive unit side. Take mechanism.   The sheet winding mechanism according to claim 1, wherein the lever is positioned inside an outer peripheral surface of the winding shaft except for the locking claw.   A bearing holder is provided on the drive unit side in the winding shaft, and the disengagement prevention member abuts on the bearing holder in a state where the lever is pushed into the drive unit side. The sheet winding mechanism according to the item. The lever has a slide guide that guides the lever in the winding shaft direction when sliding along the winding shaft,
A disengagement prevention member having a flange that is wider than the lever slide guide and further protrudes in the width direction at an upper portion thereof;
The winding shaft has a slightly wider width than the lever slide guide, a first area having a slit width narrower than the width of the detachment preventing member and a width slightly wider than the width of the detachment preventing member, and is wider than the width of the flange portion. A slit having a second region having a narrow slit width;
A step is formed, which is formed by a difference in slit width between the first region and the second region, and prevents the lever from coming out of the take-up shaft by coming into contact with the detachment preventing member. Item 5. The sheet winding mechanism according to any one of Items 1 to 4.   A printer comprising the sheet winding mechanism according to any one of claims 1 to 5.

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