JP2002068546A - Tape printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a miniaturizable tape printer capable of improving sheet carrying accuracy. SOLUTION: A paper discharge roller unit 37, a platen roller 21, a grip roller 22 and a core 11A of a roll sheet unit 11 for constituting a carrying mechanism part 15 are respectively rotatably driven via a first gear train 25 by driving of a first driving motor 24, and a roll sheet 10 is discharged or rewound. A thermal head 27 is pressed to or separated from the platen roller 21 via a second gear train 28 for constituting an image forming mechanism part 17 by driving of a second driving motor 30, and the roll sheet 10 is cut by a cutting mechanism part 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape printing apparatus provided with a conveying means for conveying a roll sheet wound around a cylindrical core, and more particularly, to a tape printing apparatus having a simple roll sheet conveying mechanism. The present invention relates to a tape printer capable of improving the conveyance accuracy and reducing the size.

[0002]

2. Description of the Related Art Heretofore, there has been known a tape printing apparatus for printing characters and the like on a long sheet in which release paper is adhered to an adhesive sheet via a thermal head. In such a tape printing apparatus, a roll sheet wound around a core, a roll sheet holder to which the roll sheet wound around the core is detachably attached, and the roll sheet holder are mounted inside the tape printing apparatus. Some include a support mechanism for rotatably supporting the roll sheet and a transport unit for pulling out and transporting the roll sheet from the roll sheet holder. In such a tape printing apparatus, usually, as a long roll sheet, a transparent film sheet formed to a predetermined width, a roll sheet having release paper attached to one side of the film sheet via an adhesive, and There is a heat-sensitive sheet (so-called thermal paper) or the like having a coloring property, and any of these roll sheets is rotatably supported in a tape printing apparatus in a state of being wound around a core, and is pulled out through a conveying means. And printed by the thermal head.

When full-color printing is to be performed on this roll sheet via a thermal head, a plurality of inks of cyan (C), magenta (M), yellow (Y), etc. are generally applied in order in a predetermined length. A ribbon cassette containing an ink ribbon applied in the length direction is mounted. Then, a thermal head is pressed onto the roll sheet or the like via the ink ribbon, and one of the colors, such as magenta (M), cyan (C), and yellow (Y), is printed for a predetermined length. Again, the roll sheet is drawn in by the predetermined length, and one of the other colors is printed. Then, by repeating this, full-color printing is performed on the roll sheet by a predetermined length.

[0004]

However, when performing full-color printing or the like, it is necessary to convey the roll sheet a plurality of times by a predetermined length while maintaining high sheet conveyance accuracy in the longitudinal direction of the roll sheet. In addition, there is a problem that the configuration of the roll sheet transport mechanism is complicated and it is difficult to reduce the size.

Accordingly, the present invention has been made to solve the above-mentioned problems, and the structure of a simple roll sheet conveying mechanism can improve the sheet conveying accuracy and reduce the size. It is an object of the present invention to provide a tape printing apparatus capable of performing the following.

[0006]

According to another aspect of the present invention, there is provided a tape printing apparatus including a conveying unit for conveying a roll sheet wound around a cylindrical core. , The transport unit receives a drive of a first roller disposed on an upstream side of a roll sheet transport path, a second roller disposed on a downstream side of the transport path, a drive unit, and the drive unit. And a drive transmitting member for transmitting the drive to the first roller and the second roller, wherein the drive transmitting member starts the rotation of the second roller and then starts the rotation of the first roller. Is transmitted.

According to the tape printer according to the first aspect of the present invention, the roll sheet wound around the cylindrical core is placed on the upstream side of the transport path of the roll sheet. Rollers and a second roller disposed downstream of the transport path.
Conveyed by the rollers, characters and the like are printed. Also,
The drive of the driving means constituting the transport means is transmitted to the first roller and the second roller via the drive transmission member, and after the second roller is started to rotate via the drive transmission member, the first roller is rotated. It is signaled to start. Thus, after the roll sheet on the downstream side of the first roller in the transport path is pulled out by the second roller, the roll sheet is sequentially pulled out by the second roller and the first roller, so that the first roller and the second roller And the slack of the roll sheet between them can be removed, the skew of the roll sheet can be effectively prevented, and the sheet conveyance accuracy can be improved. In addition, the drive transmission member can start rotation of the first roller after rotation of the second roller through a simple mechanism configuration via a planetary gear or the like, so that the drive transmission member can be downsized.

[0008] A tape printing apparatus according to claim 2 is
2. The tape printing apparatus according to claim 1, wherein the drive transmission member transmits the drive of the drive unit such that the drive speed of the first roller is lower than the rotation speed of the second roller by a predetermined rotation speed. 3. It is characterized by.

According to a second aspect of the present invention, there is provided a tape printer according to the first aspect, wherein the drive transmitting member controls the rotation speed of the first roller to be equal to the rotation speed of the second roller. The driving of the driving means is transmitted so as to be driven at a predetermined rotation speed slower than that. Thereby, the roll sheet between the first roller and the second roller is
Since an appropriate tension is apparently applied by the second roller, the slack of the roll sheet between the first roller and the second roller is removed to effectively prevent the skew of the roll sheet and the like, thereby improving the sheet conveyance accuracy. Improvement can be achieved.

[0010] The tape printing apparatus according to claim 3 is
3. The tape printing apparatus according to claim 1, wherein the transport unit is disposed downstream of the second roller in the transport path, and is driven by the drive transmission member via a third roller. 4. A first sheet guide member disposed at a lower side of the third roller so as to face at a predetermined interval, wherein the third roller has a plurality of sheet pressers extending obliquely outward on the outer peripheral surface at a predetermined angle. A sheet pressing member configured to contact the roll sheet with a predetermined pressing force when the roll sheet is conveyed.

According to the tape printing apparatus according to the third aspect having the above-mentioned features, in the tape printing apparatus according to the first or second aspect, the transporting means is more than the second roller in the transporting path. A third roller disposed downstream is driven via the drive transmission member. Further, first sheet guide members are arranged at predetermined intervals below the third roller. Further, a plurality of sheet pressing members extending outward at a predetermined angle are provided on the outer peripheral surface of the third roller. Further, the sheet pressing member is configured to come into contact with the roll sheet with a predetermined pressing force when the roll sheet is transported. Then, the third roller is driven while pressing the roll sheet against the first sheet guide member with a predetermined pressure via the sheet pressing member. Thus, the roll sheet downstream of the second roller is gripped by the sheet pressing member and the first sheet guide member formed on the outer peripheral surface of the third roller, and the roll sheet is discharged only by the third roller. Therefore, it is possible to reduce the size of the transport mechanism by eliminating the pinch rollers and the like, to remove the slack of the roll sheet between the second roller and the third roller, and to reduce the skew of the roll sheet. This can be effectively prevented, and the sheet conveyance accuracy can be improved.

Further, the tape printer according to claim 4 is
4. The tape printing apparatus according to claim 3, wherein the first sheet guide member has a plurality of concave portions formed at a predetermined position immediately below the third roller, and a leading end of the sheet pressing member is provided in the concave portion. 5. It is characterized by entering.

According to the tape printer according to the fourth aspect of the present invention, the leading end of the sheet pressing member enters the recess formed immediately below. Therefore, the amount of deformation of the sheet pressing member is reduced, and the third roller can be prevented from being deformed over time.

According to a fifth aspect of the present invention, there is provided a tape printing apparatus comprising:
The tape printing apparatus according to claim 4, wherein the recess is a through hole.

According to the tape printer according to the fifth aspect of the present invention, since the recess is a through hole, the processing of the first sheet guide member can be performed. In addition, the length of the sheet pressing member in the radial direction can be increased, and the pressing force of the roll sheet can be increased.

Further, the tape printer according to claim 6 is
6. The tape printing apparatus according to claim 3, wherein the sheet pressing member is formed in a substantially flat plate shape having a predetermined width and formed at predetermined intervals on an outer peripheral surface of the third roller. I do.

According to the tape printer according to the sixth aspect having the above-mentioned features, in the tape printer according to any one of the third to fifth aspects, the sheet pressing member is a substantially flat plate having a predetermined width. Since it is formed at predetermined intervals on the outer peripheral surface of the third roller in a shape, an appropriate roll sheet pressing force can be easily added by changing the thickness of the sheet pressing member in the radial direction, The slackness of the roll sheet between the second roller and the third roller can be removed to improve sheet conveyance accuracy.

Further, the tape printer according to claim 7 is
The tape printing apparatus according to any one of claims 3 to 6, wherein the third roller has a clutch unit,
The transport means is capable of transporting the roll sheet back and forth in the longitudinal direction, and the clutch means, when discharging the roll sheet, drives the drive transmission member to the third position.
When transmitting to the roller and pulling in the roll sheet, the drive of the drive transmission member is shut off to stop the third roller.

According to the tape printing apparatus according to the seventh aspect having the above-mentioned features, in the tape printing apparatus according to any one of the third to sixth aspects, the transporting means includes:
The roll sheet can be transported back and forth in the longitudinal direction. In addition, the third roller receives the drive from the drive transmission member via the clutch means. When the roll sheet is discharged, the drive of the drive transmission member is transmitted to the third roller, and when the roll sheet is pulled in,
The drive of the drive transmission member is interrupted, and the third roller is stopped. Accordingly, when the roll sheet is pulled in, the roll sheet is pulled in while being pressed by the first sheet guide member by the sheet pressing member of the third roller. As a result, the sheet conveyance accuracy can be improved.

The tape printer according to claim 8 is
The tape printing apparatus according to any one of claims 3 to 7, wherein the first sheet guide member is disposed on an upper surface of the first sheet guide member so as to face the roll sheet at an interval substantially equal to the width of the roll sheet. And a first guide member having an inner facing surface formed at a predetermined height to guide the roll sheet along a conveying path, wherein the third roller is provided near the inner left and right edges of the roll sheet. An outer pressing portion is provided on an outer peripheral surface at a position opposed to the outer surface so as to protrude radially outward with a predetermined width in the axial direction.

According to the tape printer according to the eighth aspect having the above-mentioned features, in the tape printer according to any one of the third to seventh aspects, the first sheet guide member is provided with the first sheet guide member. A first guide member which is disposed on the upper surface of the sheet guide member at an interval substantially equal to the width of the roll sheet and has an inner facing surface formed at a predetermined height to guide the roll sheet along a transport path; Is provided. In addition, the third roller is provided with an outer pressing portion that is provided to protrude radially outward at a predetermined width in the axial direction on an outer peripheral surface at a position facing near the inner side of both right and left edges of the roll sheet. Accordingly, the skew of the roll sheet conveyed by the third roller and the first sheet guide member in the left-right direction is prevented by the first guide member, and the right and left edges of the roll sheet are pressed outward. Since the roll sheet can be held down, the accuracy of sheet conveyance in the longitudinal direction of the roll sheet can be improved.

According to a ninth aspect of the present invention, there is provided a tape printing apparatus comprising:
The tape printing apparatus according to any one of claims 1 to 8, wherein the lower surface is disposed on each lower surface of left and right side edges of the roll sheet upstream of the second roller in the transport path. The second guide member has a protrusion having a predetermined height standing on the upper surface at a substantially right angle, and a distance dimension of each protrusion in a roll sheet width direction is provided. The roll sheet is formed substantially equal in width to the roll sheet, and is provided so as to guide the roll sheet along a conveyance path.

According to the tape printer of the ninth aspect having such a feature, in the tape printer of the first aspect, the upstream side of the second roller of the transport path. A second guide member disposed on each lower surface of both right and left side edges of the roll sheet, and each lower surface is in sliding contact with each other, and each of the second guide members is provided at a predetermined height standing substantially perpendicular to the upper surface. The protrusions have a distance dimension in the roll sheet width direction of each of the protrusions, which is formed substantially equal to the width dimension of the roll sheet, and is provided so as to guide the roll sheet along a transport path. I have. This allows
Since the skew of the roll sheet on the upstream side of the second roller in the left-right direction is prevented by the second guide member, the accuracy of sheet conveyance in the longitudinal direction of the roll sheet can be improved. In addition, the cooperation between the first guide member of the first sheet guide member and the outer pressing portion of the third roller further prevents skew of the roll sheet in the left-right direction. Further, the accuracy of sheet conveyance to the sheet can be further improved.

According to a tenth aspect of the present invention, in the tape printing apparatus of the ninth aspect, the second guide member is provided detachably.

According to the tape printer according to the tenth aspect, which has such features, in the tape printer according to the ninth aspect, the second guide member is detachably provided. Accordingly, when a roll sheet having release paper adhered to one side of a film sheet via an adhesive is conveyed, if a large amount of adhesive adheres to the second guide member, the second guide member is replaced. Therefore, the sheet conveyance accuracy can be maintained with high accuracy.

According to a eleventh aspect of the present invention, in the tape printing apparatus of the ninth or tenth aspect, the second guide member is a resin molded product of a predetermined material to which an adhesive is unlikely to adhere. There is a feature.

[0027] According to the tape printer according to the eleventh aspect, which has such a feature, in the tape printer according to the ninth aspect or the tenth aspect, the second guide member has a predetermined shape to which the adhesive is less likely to adhere. Because it is a resin molded product of the material,
When transporting a roll sheet having release paper adhered to one side of a film sheet via an adhesive, adhesion of the adhesive to the second guide member is prevented, and sheet transport accuracy is maintained with higher accuracy. It becomes possible. Further, only the second guide member can be formed of an expensive material to which the adhesive is unlikely to adhere, and the manufacturing cost of the tape printer can be reduced.

According to a twelfth aspect of the present invention, in the tape printing apparatus according to any one of the first to eleventh aspects, the cutting blade is disposed downstream of the second roller in the transport path. Provided with a cutter member, cutter transport means for reciprocating the cutter member in the width direction of the roll sheet, and disposed downstream of the cutter member on the transport path, and an upstream end face portion is provided to the cutting blade. An opposing second sheet guide member, wherein the cutter member has a pressing member provided above the cutting blade, and a lower end surface of the cutting blade of the pressing member on the cutting edge side of the second sheet guide member. It is characterized in that it is formed so as to be located below the upper surface by a predetermined dimension.

According to the tape printer according to the twelfth aspect having the above-described features, in the tape printer according to the first aspect, the downstream side of the second roller in the transport path. A cutter member provided with a cutting blade is disposed on the roll sheet, and is reciprocated in the width direction of the roll sheet by the cutter conveying means. A second sheet guide member is provided downstream of the cutter member in the transport path and has an upstream end surface facing the cutting blade. The cutter member has a pressing member provided above the cutting blade, and the lower end surface of the cutting blade on the cutting edge side of the pressing member is positioned below the upper surface of the second sheet guide member by a predetermined dimension. Is formed. Accordingly, when the cutter member is conveyed to the blade edge side of the cutting blade by the cutter conveying means, the blade edge side lower end surface of the pressing member provided above the cutting blade of the cutter member moves the roll sheet to the second sheet guide member. This cutter member can cut the roll sheet smoothly because it is pulled down below the upper surface of the roll sheet to eliminate the slack of the roll sheet.

[0030] Further, the tape printing apparatus according to claim 13 is the tape printing apparatus according to claim 12, wherein the cutting blade is provided such that the cutting edge is inclined with respect to the roll sheet in the cutting-side transport direction. Features.

According to the tape printing apparatus having the above features, in the tape printing apparatus according to the twelfth aspect, the cutting edge of the cutting blade is inclined with respect to the roll sheet in the cutting-side transport direction. Therefore, fluffing of the roll sheet occurs in the lower side of the printing surface, and a good printing surface can be formed.

[0032]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a tape printer according to an embodiment of the present invention. First, a schematic configuration of a main body housing of the tape printing apparatus according to the present embodiment will be described with reference to FIGS. FIG. 1 is a perspective view illustrating a schematic configuration of a main body housing of the tape printing apparatus according to the present embodiment. FIG. 2 is a plan view illustrating a schematic configuration of a main body housing of the tape printing apparatus according to the present embodiment. In both figures, an upper cover that is openably and closably attached to a main body housing of the tape printer via an upper frame 3 (see FIG. 3 and the like) is removed. FIG. 3 shows the internal structure of the tape printer according to the present embodiment,
(A) is a perspective view from the second gear train side, and (B) is a side view on the second gear train side. 4A and 4B show the internal structure of the tape printing apparatus according to the present embodiment. FIG. 4A is a perspective view from the first gear train side, and FIG. 4B is a side view on the first gear train side. 5A and 5B show the internal structure when the upper frame of the tape printing apparatus according to the present embodiment is removed, wherein FIG. 5A is a perspective view from the first gear train side, and FIG. It is. FIG.
FIG. 5 is a perspective view from a second gear train showing a case where a ribbon cassette is mounted with an upper frame of the tape printing apparatus according to the embodiment removed.

As shown in FIGS. 1 and 2, the main body 2 of the tape printing apparatus 1 has side walls 5 provided on both left and right sides.
And a roll sheet unit 11 rotatably supporting a roll sheet 10 wound around a core 11A (see FIG. 13) in a lower frame 7 having the roll sheet 10 and transporting the roll sheet 10 in both forward and reverse directions. And a cutting mechanism 16 for cutting the roll sheet 10 conveyed by the conveying mechanism 15.
Are provided. The upper frame 3 (see FIG. 3 and the like) is disposed upstream of the cutting mechanism 16 when the roll sheet 10 is transported in the forward direction, and forms an image for forming a predetermined image on the roll sheet 10. An image forming mechanism 17 (see FIG. 3) is provided as a unit. Further, on the lower side of the lower frame 7, each of the mechanical units 15, 16,
A control circuit unit (not shown) for driving and controlling the 17 and the like is provided.

The roll sheet unit 11 is detachably attached to one end of the lower frame 7. That is, a pair of unit support portions 16A, 16B in which the mounting members 14A, 14B projecting outward from the unit holders 12, 13 constituting the roll sheet unit 11 are detachably fitted in the lower frame 7. Is provided. The roll sheet unit 11 is removably mounted in the lower frame 7 by fitting the mounting members 14A, 14B of the roll sheet unit 11 into the unit support portions 16A, 16B.

As shown in FIGS. 4 and 5, the transport mechanism 15 includes a platen roller 21 which is also a component of the image forming mechanism 17, and a grip roller disposed upstream of the platen roller 21. 22. A pair of driven rollers 23, 23 is disposed on the upper frame 3 at a position facing the grip roller 22 with the roll sheet 10 interposed therebetween. Each of the driven rollers 23 is urged by a spring or the like toward the grip roller 22 so as to be rotatably supported. The platen roller 21 and the discharge roller 22 are driven by the first drive motor 24 composed of a stepping motor and the like disposed on the side wall 5 of the lower frame 7 in the forward and reverse directions.
, So that the roll sheet 10 is conveyed in the forward direction (discharge direction) and the reverse direction (draw-in direction).
Also, the unit holder 13 of the roll sheet unit 11
A roll sheet winding gear 13 </ b> A is provided on the outer peripheral surface of the transfer mechanism 15, and is connected to a first gear train 25 of the transport mechanism 15 so that the roll sheet 10 can be wound as described later.

Further, as shown in FIG.
When color printing is performed at 0, the ribbon cassette 71 is mounted on the lower frame 7 so that the ink ribbon covers the platen roller 21. Further, a ribbon take-up spool (not shown) for taking up an ink ribbon built in the ribbon cassette 71 takes up the first sheet through the first gear train 25 together with the conveyance of the roll sheet 10 in the discharge direction as described later. (See FIG. 13). A thermal head 27 that constitutes the image forming mechanism 17 is disposed on the upper frame 3 at a position facing the platen roller 21 with the roll sheet 10 interposed therebetween (see FIG. 7). The thermal head 27 is urged and supported by a spring or the like toward the platen roller 21 as described later. Also, the thermal head 27
When the roll sheet 10 is transported in the forward direction via the second gear train 28 by the forward rotation of the second drive motor 30 constituted by a DC motor or the like disposed on the side wall 6 of the lower frame 7 When the roll sheet 10 is pressed against the platen roller 21 and is conveyed in the reverse direction by the reverse rotation of the second drive motor 30, the roll sheet 10 is lifted away from the platen roller 21 against the pressing force of a spring or the like. Can be Therefore, the roll sheet 10
By the rotation of the platen roller 21 and the grip roller 22, the sheet is transported in the forward direction (the direction in which it is pulled out).
The paper is conveyed in the reverse direction (the direction in which it is pulled in) by the reverse rotation of the grip roller 22.

As shown in FIGS. 1 and 2, a pair of resin-made guide members 4A and 4B made of resin such as polyacetal to which an adhesive is unlikely to be attached are provided on the upstream side of the left and right edges of the platen roller 21. It is detachably attached by, for example. On the upper surface of each of the guide members 4A and 4B, each outer pressing portion 4C and 4D which comes into contact with the side surface in the width direction of the roll sheet 10 and guides in the conveying direction is formed so as to protrude upward by a predetermined height. . Thereby, each guide member 4A,
The roll sheet 10 is guided along the conveyance path by the upper surface of 4B and the opposing surfaces of the outer pressing portions 4C and 4D, and is guided above the platen roller 21.

A paper discharge roller unit 37 is disposed immediately above the downstream edge of the cutter plate 35 (see FIG. 9 and the like) constituting the cutting mechanism 16.
The paper discharge roller unit 37 is provided with a pair of paper discharge rollers 38, 38 (see FIG. 12) as described later, and cooperates with the cutter plate 35 to sandwich the roll sheet 10 and to form the first gear train. When the roll sheet 10 is conveyed in the reverse direction while being conveyed in the reverse direction, the roll sheet 10 is stopped and slid while applying a predetermined pressing force. The roll sheet 10 conveyed between the paper discharge roller unit 37 and the cutter plate 35
Is a sheet discharge port 2A formed on the front surface of the main body housing 2.
After being cut into a predetermined length by the cutting mechanism section 16, the sheet is discharged (see FIG. 1).

Next, the pressure release mechanism of the image forming mechanism 17 will be described with reference to FIGS. FIG. 7 shows an image forming mechanism 1 of the tape printing apparatus 1 according to the present embodiment.
7 is a platen roller 21
It is a front view showing the state released from. FIG. 8 is an enlarged front view showing the configuration of the second gear train 28 of the tape printer 1 according to the present embodiment. As shown in FIG. 7, the image forming mechanism unit 17 includes a line-type thermal head 27 as a printing unit having a length substantially equal to the maximum width dimension of the roll sheet 10 that can be mounted on the roll sheet unit 11.
And a platen roller 21 opposed to the thermal head 27 with the roll sheet 10 interposed therebetween. Also,
The thermal head 27 is supported in a substantially U-shape so as to be vertically movable with respect to a rotating shaft 43 that is supported by the side walls 41 and 42 of the upper frame 3, and has a rotating shaft of the platen roller 21 at an outer end. Each support member 44, 44 in which a concave portion to be inserted is formed, is attached. Further, eccentric cams 45, 45 having a predetermined diameter are attached to positions of the rotating shaft 43 facing the respective support members 44. The thermal head 27 is connected to the rotating shaft 4 forming the second gear train 28.
3, the respective eccentric cams 45, 45 rotate by 180 degrees, and the respective support members 44, 44 move up and down.
Contacted or separated. When the thermal head 27 comes into contact with the platen roller 21, each eccentric cam 4
The reference numerals 5 and 45 are configured so as to be separated from the respective support members 44 and 44 by a predetermined distance.

The rotating shaft 43 and the thermal head 27
Is covered by a top plate 46 laid between the side walls 41 and 42. Further, head springs 48, 48 are provided at predetermined intervals between the thermal head 27 and the top plate 46.
Is mounted so that the thermal head 27 is pressed against the platen roller 21 with a predetermined pressing force.

On the other hand, as shown in FIG.
Has a motor drive gear 51 attached to the shaft of the second drive motor 30, a first cam double gear 52 meshed with the motor drive gear 51, and is rotatably supported by a rotating shaft of the first cam double gear 52. A pair of first and second planetary gears 53 meshing with the first cam double gear 52
A, 53B, a second cam double gear 54 meshing with the first planetary gear 53A, a third cam double gear 55 meshing with the second cam double gear 54, and a cam idle gear meshing with the third cam double gear 55. 56,
The cam idle gear 56 and a cam gear 57 meshing with the cam idle gear 56 are provided. Also, a cam portion 57A is formed on the inner side surface of the cam gear 57 so as to protrude inward in an arc at an angle of about 180 degrees, and the center position of the arc is opposed to the short-diameter portion of the eccentric cam 45. I have. Also, when the cam portion 57A rotates and comes into contact with the cam portion 57A, it turns ON / OFF.
The switch SW1 is provided on the side wall 42.
The switch SW1 is connected to a control circuit (not shown). The other second planetary gear 53B meshes with a lead screw gear 58 attached to one end of a lead screw (see FIG. 10) described later.

Next, the operation of the second gear train 28 will be described with reference to FIG. To start printing, it is necessary to press the thermal head 27 against the platen roller 21 with a predetermined pressing force. First, the second drive motor 30 is rotated counterclockwise, and the first cam double gear 52 and the first planet Gear 53A, second cam double gear 54, third cam double gear 55, cam idle gear 56, and cam gear 57
Rotate in order. As a result, the cam gear 57 rotates counterclockwise, so that the eccentric cams 45 also rotate counterclockwise at the same time. Then, after the cam portion 57A formed on the inner side surface of the cam gear 57 comes into contact with the switch SW1 and outputs an ON signal, the rotation of the second drive motor 30 is stopped, so that the short diameter of each eccentric cam 45 is right above. At this position, the thermal head 27 is pressed against the platen roller 21 with a predetermined pressing force via the head springs 48, 48.

When printing is completed, it is necessary to separate the thermal head 27 from the platen roller 21. First, the second drive motor 30 is rotated counterclockwise, and the first cam double gear 52 and the first Planetary gear 53A,
The second cam double gear 54, the third cam double gear 55, the cam idle gear 56, and the cam gear 57 are rotated in this order. As a result, the cam gear 57 rotates counterclockwise again, so that the eccentric cams 45 also rotate counterclockwise at the same time. Then, the cam portion 57A formed on the inner side surface of the cam gear 57 is separated from the switch SW1 to output an OFF signal, and the control circuit portion receiving this OFF signal stops after rotating the second drive motor 30 by a predetermined amount. Let it.
As a result, the major diameters of the eccentric cams 45, 45 are located directly above, and the thermal head 27 is lifted up against the pressing force of the head springs 48, 48 and separated from the platen roller 21.

Next, the mechanism of the cutting mechanism 16 will be described with reference to FIGS. FIG. 9 shows the paper ejection roller unit 37 of the tape printer 1 according to this embodiment.
FIG. 4 is a diagram showing the cutting mechanism 16 with the
(A) is a plan view, (B) is a BB cross-sectional view in (A), and (C) is a view on arrow C in (A). FIG. 10 is a front sectional view showing a carriage mechanism of the cutting mechanism 16 of the tape printing apparatus 1 according to the present embodiment. FIG.
1 is a diagram showing driving of the cutting mechanism 16 of the tape printing apparatus 1 according to the embodiment by the second gear train 28;
(A) is a partially enlarged front view showing driving when the roll sheet 10 is cut, and (B) is a partially enlarged front view showing driving when moving the home position.

As shown in FIGS. 9 and 10, the cutting mechanism 16 is provided with a cutter plate 35 having a substantially L-shaped cross section, which is laid on each of the side walls 5 and 6 on the downstream side of the platen roller 10 and receives the roll sheet 10. And the roll sheet 10 while moving along the upstream end face of the cutter plate 35.
Unit 6 that cuts the surface perpendicular to the traveling direction
0 and the cutting direction of the cutter unit 60 (FIG. 9)
(A) middle and left and right directions). This cutter unit 60
When printing or transporting the roll sheet 10, FIG.
As shown in FIG. 2A, the robot is waiting at a home position that is separated from the path of the roll sheet 10. The cutter unit 60 includes a cutter carriage 61 and a cutter blade 6 having a cutting edge mounted on the upper side of the cutter carriage 61 at a predetermined angle in the cutting direction (the direction of arrow D).
2 and a cutter cap 63 attached to the upper part of the cutter blade 62.

The cutter cap 63 is provided as shown in FIG.
As shown in (C), the lower end of the cutting edge of the cutter blade 62 covers the upper surface of the edge of the cutter plate 35 on the upstream side of the transport path, and the upstream end surface of the cutter cap 63 is connected to the cutter plate 35. Is extended downward so as to be located below a predetermined dimension (about 1 mm in the present embodiment) from the upper surface of the. Thereby, when the cutter unit 60 is moved in the cutting direction, the cutter cap 63
The lower end of the roll sheet rides on the roll sheet 10 and pushes it down, so that tension acts on the roll sheet 10,
The cutter blade 62 can be reliably pressed at right angles to the roll sheet 10, and the cutting can be performed smoothly while suppressing the occurrence of jams and the like. In addition, since the cutting edge of the cutter blade 62 is pressed obliquely downward from the printing surface side of the roll sheet 10, fluffing or the like may occur.
, A good printing surface can be formed.

As shown in FIG. 10, the cutter carriage 61 is slidably inserted into a guide shaft 65 supported on both side walls 5, 6 of the lower frame 7, and is also slidable.
5 is screwed to a lead screw 66 which is rotatably supported on both side walls 5 and 6 substantially in parallel with 5. A lead screw gear 58 constituting the second gear train 28 is attached to the outer edge of the side wall 6 of the lead screw 66 via a lead screw clutch spring 67. When the cutter carriage 61 is located at the home position, a switch SW2 that contacts the cutter carriage 61 and outputs an ON signal is attached to the side wall 5. In addition, a switch SW3 that outputs an ON signal by contacting the cutter carriage 61 when it is located at the cutting end position is attached to the side wall 6. The switches SW2 and SW3 are connected to a control circuit.

As shown in FIG. 11A, the cutter unit 60 is driven at the time of cutting the roll sheet 10,
The drive motor 30 is rotated clockwise to rotate the first cam double gear 52, the first planetary gear 53A, and the lead screw gear 58 in this order. When the second drive motor 30 is rotated clockwise, the second planetary gear 53B and the second
It does not mesh with the cam double gear 54. Then, the lead screw gear 58 rotates counterclockwise, and the lead screw 66 connected via the lead screw clutch spring 67 is rotated counterclockwise. Subsequently, the cutter carriage 61 screwed to the lead screw 66 is rotated along the guide shaft 65 and the lead screw 66 by the counterclockwise rotation of the lead screw 66 (see FIG. 9A and FIG. 10). When the cutting screw 61 reaches the cut end position, the lead screw clutch spring 67 is on the tightening side, so that the cutter carriage 61 is pressed against the switch SW3, and an ON signal is output from the switch SW3. Output to the control circuit unit.

On the other hand, as shown in FIG. 11 (B), the control circuit unit which has received the ON signal from the switch SW3
When it is determined that the cutter carriage 61 has reached the cut end position, that is, it is determined that the cutting of the roll sheet 10 has been completed, the second drive motor 30 is rotated in the reverse rotation direction (counterclockwise), and the first cam double gear 52 and the first 2 planetary gear 53
B and the lead screw gear 58 are rotated in this order. still,
When the second drive motor 30 is rotated in the counterclockwise direction, the first planetary gear 53A and the second cam double gear 54 mesh with each other to transmit the drive as described above (see FIG. 8).
Then, the lead screw gear 58 rotates clockwise, and the lead screw 66 connected via the lead screw clutch spring 67 is rotated clockwise. Subsequently, the cutter carriage 61 screwed to the lead screw 66 is connected to the lead screw 6.
6 in the home position direction along the guide shaft 65 and the lead screw 66 by the clockwise rotation of FIG.
(In the left direction in FIG. 10) and reaches the home position, the cutter carriage 61 contacts the switch SW2, and the switch SW2 outputs an ON signal to the control circuit unit. When the second drive motor 30 rotates clockwise while the cutter carriage 61 is in contact with the switch SW2, the lead screw clutch spring 67 is on the loose side, and the rotational driving force of the lead screw gear 58 is Is not transmitted to the lead screw 66, and the lead screw 66 does not rotate. On the other hand, the control circuit unit that has received the ON signal from the switch SW2 determines that the cutter carriage 61 has reached the home position, stops the second drive motor 30, and ends the cutting process of the roll sheet 10 by the cutter unit 60. I do.

Next, the configuration of the transport roller unit 37 constituting the transport mechanism 15 will be described with reference to FIG. FIGS. 12A and 12B show the discharge roller unit 37 of the tape printer 1 according to the present embodiment, wherein FIG. 12A is a front view, and FIG.

As shown in FIG. 12, a gear shaft 81A of the discharge roller gear 81 constituting the first gear train 25 is rotatably supported on the side wall 5 of the lower frame 7. One end of the discharge roller unit 37 has a first clutch spring 81.
The other end is rotatably supported on the gear shaft 81A of the discharge roller gear 81 via a second clutch spring 82. When the discharge roller unit 37 rotates in the direction of pulling in the roll sheet 10 (counterclockwise in FIG. 12B), the first clutch spring 82 is on the tightening side and becomes the tightening side. Operate to stop. When the paper discharge roller unit 37 rotates in the direction of discharging the roll sheet 10 (clockwise in FIG. 12B), the first clutch spring 82 becomes loose and the paper discharge roller It operates so as not to hinder the rotation of the unit 37.

The driving of the discharge roller gear 81 is transmitted to the discharge roller unit 37 via the second clutch spring 83. The second clutch spring 83 allows the discharge roller gear 81 to move the discharge roller unit 37 to the roll sheet 10.
In the case of rotating in the pull-in direction (counterclockwise in FIG. 12B), the paper discharge roller unit 37 becomes loose because the first clutch spring 82 is tightened.
Is stopped by the first clutch spring 82,
The discharge roller gear 81 idles. On the other hand, when the discharge roller gear 81 rotates the discharge roller unit 37 in the discharge direction of the roll sheet 10 (clockwise in FIG. 12B), the second clutch spring 83 is on the tightening side, and , The first clutch spring 82 is on the loose side, so that the discharge roller unit 37
(The clockwise direction in FIG. 12B).

The paper discharge roller unit 37 has a pair of substantially cylindrical paper discharge rollers 84, 84 mounted coaxially. Also, a cutter plate 35 having a substantially L-shaped cross section is used.
Are formed such that one outer side is on the upper side and the other outer side is on the front side, and a gap slightly larger than the maximum thickness dimension of the roll sheet 10 and each central portion of the discharge rollers 84, 84 is formed. It is supported on the side walls 5 and 6. Further, the through holes 86, 86, 86, 86 are provided at positions of the cutter plate 35 facing the left and right end surfaces of the respective paper discharge rollers 84, 84.
Are drilled. Further, the left and right end surfaces of each of the paper discharge rollers 84, 84 extend obliquely outward, and each of the through holes 8.
6, 86, 86, and a substantially flat sheet holding portion 84A reaching the inside of the plate 86 are formed at predetermined center angles (every 36 degrees in the present embodiment). As a result, each sheet pressing portion 84A presses the roll sheet 10 against the upper surface of the cutter plate 35 with a predetermined pressing force, so that a nip force required for discharging the roll sheet 10 is generated.

On the upper surface of the cutter plate 35 opposed to the paper discharge roller unit 37, guide members 87A and 87B which come into contact with the side surface in the width direction of the roll sheet 10 and guide the same in the transport direction are detachably attached. I have. Each of the guide members 87A and 87B is a resin molded product such as polyacetal to which an adhesive is unlikely to adhere. Further, the end surfaces of the guide members 87A and 87B on the roll sheet 10 side are extended upward by a predetermined height dimension, and are formed so as to reliably contact the side surfaces in the width direction of the roll sheet 10. A substantially disk-shaped paper discharge side roller 8 that presses the upper surface of the roll sheet 10 from above is provided at a position slightly inside the inner end surfaces of the guide members 87A and 87B of the paper discharge roller unit 37.
8A and 88B are provided coaxially. This allows
The roll sheet 10 is guided in the transport direction by the guide members 87A and 87B and the discharge side rollers 88A and 88B.

Further, the leading end of the roll sheet 10 is brought into contact with the front surface of the cutter plate 35 at a position corresponding to the center position in the width direction of the roll sheet 10 so that O
A switch SW4 that is N / OFF is provided.
The switch SW4 is connected to a control circuit (not shown). Thus, the position of the leading end of the roll sheet 10 discharged by the discharge rollers 84 can be detected.

Next, the structure and driving operation of the first gear train 25 will be described with reference to FIG. FIGS. 13A and 13B are diagrams illustrating a configuration of the first gear train 25 of the tape printing apparatus 1 according to the present embodiment, in which FIG. 13A is an enlarged front view illustrating a rewind operation of the roll sheet 10, and FIG. FIG. 10 is an enlarged front view showing a discharging operation of No. 10; As shown in FIG. 13, first, the configuration of the first gear train 25 that drives the grip roller 22 and the roll sheet take-up gear 13A (see FIG. 5) includes a motor gear 91 attached to a shaft of the first drive motor 24, A first roller double gear 92 meshing with the motor gear 91;
And a pair of first and second delay arms 93 which are supported at a predetermined center angle on the outer peripheral edge of the delay arm 93 and mesh with the first roller double gear 92. First and second planetary gears 94A and 94B, a second roller double gear 95 meshing with one of the first and second planetary gears 94A and 94B, and meshing with the second roller double gear 95 In addition, a roller gear 96 attached to one end of the grip roller 22, a planetary gear arm 97 that is rotatably supported on the axis of the roller gear 96 by a predetermined angle, and is supported at one end of the planetary gear arm 97. A third planetary gear 98 meshing with the roller gear 96; a first clutch gear 99A meshing only with the third planetary gear 98 when the tape is rewound; and a first clutch gear 99A. Clutch spring (clutch spring, the first clutch gear 99A becomes the side looseness when rotating in a counterclockwise direction, to convey a predetermined constant torque.)
, And a roll sheet winding gear 13A meshing with the second clutch gear 99B.

On the other hand, as shown in FIG. 13, the first gear train 25 for driving the platen roller 21, the paper discharge roller unit 37, and the ribbon take-up spool (not shown) of the ribbon cassette 71 has a first drive. A motor gear 91 attached to a shaft of the motor 24;
1 and a roller idle gear 10 meshed with the first roller double gear 92.
1, a substantially flat planetary gear stopper 102 mounted on the rotating shaft of the roller idle gear 101 so as to face the delay arm 93, and the roller idle gear 10
1 and the third roller double gear 103 meshing with the third
Platen gear 104 meshed with roller double gear 103 and attached to one end of platen roller 21
A discharge roller gear 81 (see FIG. 12) meshing with the platen gear 104; a discharge roller gear arm 105 rotatably supported by a predetermined angle on the axis of the discharge roller gear 81; A fourth planetary gear 106 which is rotatably supported at one end of the paper roller gear arm 105 and meshes with the paper discharge roller gear 81; and a ribbon clutch gear 107A which meshes with the fourth planetary gear 106 only during tape printing.
Then, the ribbon clutch gear 107A is rotationally driven via a clutch spring (the clutch spring becomes a loose side when the ribbon clutch gear 107A rotates counterclockwise and transmits a predetermined constant torque). Ribbon clutch gear 107B and the ribbon clutch gear 10
7B and a ribbon take-up gear 108 attached to one end of the ribbon take-up spool of the ribbon cassette 71.

Next, the schematic operation of the first gear train 25 will be described with reference to FIG. First, the rewinding operation of the roll sheet 10 will be described with reference to FIG. The thermal head 27 is separated from the platen roller 21 by a predetermined distance via the second gear train 28 by driving the second drive motor 30 in advance as described above. To rewind the roll sheet 10, the first drive motor 24 is rotated in a counterclockwise direction, and the first roller double gear 92, the second planetary gear 94B, the second roller double gear 95, the roller gear 9
6, the third planetary gear 98, the first clutch gear 99A, the second
Clutch gear 99B and roll sheet winding gear 1
Rotate in the order of 3A. At the same time, the first roller double gear 92, the roller idle gear 101, the third roller double gear 103, the platen gear 104, the discharge roller gear 81, and the fourth planetary gear 106 are rotated in this order.
Further, the paper discharge roller gear arm 105 is pushed down, and the rotational drive of the fourth planetary gear 106 is not transmitted to each of the ribbon clutch gears 107A and 107B and the ribbon take-up gear 108.

As a result, the roller gear 96 rotates counterclockwise, and the grip roller 22 to which the roller gear 96 is attached rotates counterclockwise at a predetermined rotation speed. Therefore, the roll sheet 10 pressed with a predetermined pressing force to the grip roller 22 via the driven rollers 23, 23 is drawn into the roll sheet unit 11 by the counterclockwise rotation of the grip roller 22 (the direction of arrow J). . The roll sheet winding gear 13A of the roll sheet unit 11 rotates clockwise,
The core 11A of the roll sheet 10 rotates clockwise through the roll sheet take-up gear 13A, and the roll sheet 10 pulled in by the rotation of the grip roller 22 is wound into the roll sheet unit 11. Note that the roll sheet 1 caused by the rotation of the roll sheet winding gear 13A
Since the gear ratio is set so that the take-up speed of 0 is higher than the pull-in speed of the roll sheet 10 by the grip roller 22, the grip roller 22
A moderate tension is applied to the roll sheet 10 between the roll sheet unit 11 and the roll sheet 10 so that the roll sheet 10 can be neatly wound up.

The platen gear 104 rotates counterclockwise, and the platen roller 21 attached to the platen gear 104 rotates counterclockwise. However, since the thermal head 27 is separated, the pulling force is applied to the roll sheet 10. Hardly works. Further, the paper discharge roller gear 81 meshing with the platen gear 104 rotates clockwise, but as described above, the paper discharge roller unit 37
Since the stop state is established via the clutch spring 82 and the second clutch spring 83 (see FIG. 12), the roll sheet 10 between the discharge roller unit 37 and the grip roller 22 is stopped.
And the roll sheet 10 can be wound up neatly.

Next, the first gear train 2 at the time of printing and paper discharging processing
FIG. 13 shows the operation of discharging the roll sheet 10 according to FIG.
Description will be made based on (B). Note that the second
By driving the drive motor 30, the thermal head 27 is pressed against the platen roller 21 via the second gear train 28. The discharging operation of the roll sheet 10 is performed by rotating the first drive motor 24 clockwise and rotating the first roller double gear 9.
2, a first planetary gear 94A, a second roller double gear 95,
The roller gear 96 and the third planetary gear 98 are rotated in this order. Further, the planetary gear arm 97 is pushed upward, and the rotational driving of the third planetary gear 98 is performed by the first and second planetary gears 98.
It is not transmitted to the clutch gears 99A, 99B and the roll sheet winding gear 13A. At the same time, the first roller double gear 92, the roller idle gear 101, the third
The roller double gear 103, the platen gear 104, the discharge roller gear 81, the fourth planetary gear 106, the ribbon clutch gear 107A, the ribbon clutch gear 107B, and the ribbon take-up gear 108 are rotated in this order.

Thus, the roller gear 96 rotates clockwise, and the grip roller 22 to which the roller gear 96 is attached rotates clockwise at a predetermined rotation speed. Therefore, the roll sheet 1 is pressed with a predetermined pressing force against the grip roller 22 via the driven rollers 23, 23.
0 is pulled out in the discharge side direction (rightward direction in FIG. 13) by the clockwise rotation of the grip roller 22 (in the direction of arrow K), and the core 11A of the roll sheet unit 11 moves counterclockwise accordingly. Rotate. The platen gear 104 rotates clockwise, and the platen gear 1
Since the platen roller 21 attached to the platen 04 rotates clockwise, the roll sheet 10 pressed against the platen roller 21 by the thermal head 27 via the head springs 48, 48 moves in the discharge direction (rightward in FIG. 13). Pulled out (arrow K direction). Since the gear ratio is set so that the pull-out speed of the roll sheet 10 by the rotation of the platen roller 21 is higher than the pull-out speed of the roll sheet 10 by the grip roller 22, the platen roller 21 and the grip roller 22 are pulled out.
Appropriate tension is applied to the intermediate roll sheet 10 so that clear printing can be performed on the roll sheet 10.

The discharge roller gear 81 meshing with the platen gear 104 rotates in the counterclockwise direction, and the discharge roller unit 37 is connected via the first clutch spring 82 and the second clutch spring 83 as described above. (See FIG. 12.) Since the paper sheet rotates in the counterclockwise direction, the roll sheet 10 is pulled out in the discharge direction (the direction of arrow K) by the cooperation of the paper discharge rollers 84, 84 of the paper discharge roller unit 37 and the cutter plate 35. . The gear ratio is set such that the speed of pulling out the roll sheet 10 by the rotation of each of the discharge rollers 84 of the discharge roller unit 37 is higher than the speed of pulling out the roll sheet 10 by the platen roller 21. Therefore, the platen roller 21 and each discharge roller 8
An appropriate tension is applied to the roll sheet 10 between the roll sheets 4 and 84, so that clear printing can be performed on the roll sheet 10. Further, the discharge roller gear arm 106 is lifted up by the counterclockwise rotation of the discharge roller gear 81,
Fourth planetary gear 106 and each ribbon clutch gear 107
The ribbon take-up gear 108 rotates clockwise through A and 107B, and the ink ribbon (not shown) is taken up by a ribbon take-up spool (not shown).

Next, the operation of the delay arm 93 and the planetary gear stopper 102 at the time of printing start and printing operation will be described with reference to FIG. FIG. 14 is a diagram showing a configuration of a portion for driving the platen roller 21 and the grip roller 22 of the first gear train 25 at the time of printing of the tape printing apparatus 1 according to the present embodiment, and FIG. FIG. 6B is a partial front view, and FIG. 6B is an enlarged partial front view showing a printing operation.
The thermal head 27 is pressed against the platen roller 21 via the second gear train 28 by driving the second drive motor 30 in advance as described above. As shown in FIG. 14 (A), first, a substantially flat delay arm 93 has a slender extension extending a predetermined length outwardly from the outer peripheral surface on the opposite side of the first planetary gear 94A with respect to the rotation shaft. A protrusion 93A is provided. Further, a substantially semicircular plate-shaped planetary gear stopper 1
02 (see FIG. 14A)
At the middle, lower left position of the planetary gear stopper 102), there is provided a concave portion 102A formed in a substantially C shape that opens outward.

When printing is started, the delay arm 93 is rotated clockwise so that the second planetary gear 94B meshes with the second roller double gear 95, as shown in FIG. Rotated via 92. At the same time, the planetary gear stopper 102 is rotated counterclockwise via the roller idle gear 101. Therefore, the extension 93A of the delay arm 93 is separated from the recess 102A of the planetary gear stopper 102. When the roll sheet 10 is pulled in, the extension 93A of the delay arm 93 and the recess 102A of the planetary gear stopper 102 are similarly separated (see FIG. 13A).

Subsequently, when printing is started, FIG.
As shown in FIG. 4B, the motor gear 91 rotates clockwise to discharge the roll sheet, the first roller double gear 92 rotates counterclockwise, and the roller idle gear 101 rotates clockwise. Therefore, planetary gear stopper 1
02 rotates clockwise. At the same time, the rotation of the first roller double gear 92 in the counterclockwise direction causes the delay arm 93 to rotate in the counterclockwise direction, and after the second planetary gear 94B separates from the second roller double gear 95, the first roller double gear The rotation of the gear 92 at a predetermined clockwise angle causes the delay arm 93 to rotate counterclockwise by a predetermined angle, and the first planetary gear 94 </ b> A meshes with the second roller double gear 95. The rotation of the delay arm 93 at a predetermined angle in the clockwise direction causes the extension 93A to enter and fit into the recess 102A of the planetary gear stopper 102 rotating clockwise.

Thus, when the motor gear 91 is rotating clockwise, the extension 93A of the delay arm 93 is
Is maintained in the recess 102A of the planetary gear stopper 102. Further, as described above, the pulling speed of the roll sheet 10 of the platen roller 21 is
Since the gear ratio is set so as to be higher by a predetermined speed than the pull-out speed of the second roll sheet 10, a counterclockwise rotating force is applied to the second roller double gear 95, so that the second roller double gear 95 moves away from the first planetary gear 94 </ b> A. A pushing force, that is, a force for rotating the delay arm 93 clockwise is generated. But,
Since the delay arm 93 is prevented from rotating clockwise by the planetary gear stopper 102 to which a counterclockwise rotational force is applied, the first planetary gear 94 </ b> A does not separate from the second roller double gear 95, and the rotation of the motor gear 91 is prevented. The rotational driving force is reliably transmitted to the second roller double gear 95.

At the start of printing, after one second planetary gear 94B separates from the second roller double gear 95, the first first planetary gear 94A engages with the second roller double gear 95 until the other first planetary gear 94A meshes with the second roller double gear 95. The rotational drive of the roller double gear 92 is not transmitted to the second roller double gear 95 and the roller gear 96
Does not rotate. The rotation of the first roller double gear 92 is transmitted to the platen roller 21 via the roller idle gear 101, the third roller double gear 103, and the platen gear 104 together with the start of printing. Therefore,
At the start of printing, the grip roller 22 rotates after the platen roller 21 rotates for a predetermined period of time. It is possible to reliably apply an appropriate tension to the roll sheet 10, and it is possible to perform clear printing on the roll sheet 10.

As described in detail above, in the tape printing apparatus 1 according to the present embodiment, the first drive motor 24 drives the discharge roller unit 37, the platen roller 21, the grip roller 22, and the like via the first gear train 25. And the core 11A of the roll sheet unit 11 is rotationally driven, respectively.
The roll sheet 10 is discharged or rewound. Also, the second
The drive of the drive motor 30 causes the thermal head 27 to be pressed or separated from the platen roller 21 via the second gear train 28, and the roll sheet 10 to be cut.

Therefore, the grip rollers 22 in the transport path
After the roll sheet 10 on the further downstream side is pulled out by the platen roller 21, the roll sheet 10 is sequentially pulled out by the platen roller 21 and the grip roller 22, so that the grip roller 22 and the platen roller 21 are pulled out.
The slack of the roll sheet 10 between the roll sheet 10 and the skew of the roll sheet 10 can be effectively prevented, and the sheet conveyance accuracy can be improved. Further, since the first gear train 25 can start rotation of the platen roller 21 and then start rotation of the grip roller 22 by a simple mechanism configuration via each of the first and second planetary gears 94A and 94B, the first gear train 25 25 can be reduced in size. Since the roll sheet 10 between the grip roller 22 and the platen roller 21 is apparently given an appropriate tension by the platen roller 21,
The slack of the roll sheet 10 between the sheet and the platen roller 21 is removed to effectively prevent the skew of the roll sheet 10 and the like, thereby improving the sheet conveyance accuracy.

The sheet pressing portions 84A formed on the outer peripheral surfaces of the right and left edges of the conveying rollers 84, 84 of the conveying roller unit 37 and the through holes 86, 86, formed on the upper surface of the cutter plate 35, respectively. The roll sheet 10 on the downstream side of the platen roller 21 is gripped by
Since the roll sheet 10 can be discharged only by the rollers 4 and 84, the transport mechanism can be reduced by eliminating the pinch roller and the like, and the roll sheet 10 between the platen roller 21 and the transport roller unit 37 can be discharged. Slack can be removed, skewing of the roll sheet 10 can be effectively prevented, and sheet conveyance accuracy can be improved. Further, the length dimension can be increased until each sheet holding portion 84A reaches each through hole 86, and the pressing force of the roll sheet 10 can be increased. Further, since the sheet pressing portion 84A is formed in a substantially flat plate shape with a predetermined width and at a predetermined interval on the outer peripheral surface of each of the conveying rollers 84, 84, the thickness of the sheet pressing portion 84A in the radial direction is changed. Thereby, an appropriate pressing force can be easily applied to the roll sheet 10, and the slack of the roll sheet 10 between the platen roller 21 and the transport roller unit 37 can be removed to improve the sheet transport accuracy.

When the roll sheet 10 is rewound, the roll sheet 10 is pulled in while being pressed onto the upper surface of the cutter plate 35 by the sheet pressing portions 84A of the transport rollers 84 of the transport roller unit 37. The slack of the roll sheet 10 on the upstream side of the transport roller unit 37 can be removed to improve the sheet transport accuracy. Further, the transport roller unit 37
The skew of the roll sheet 10 conveyed by the sheet and the cutter plate 35 in the left and right direction is caused by each of the guide members 87A and 8A.
7B, and the warpage of the left and right end portions of the roll sheet 10 can be suppressed by the respective discharge side rollers 88A, 88B of the transport roller unit 37, so that the roll sheet 10 in the longitudinal direction is prevented. The sheet conveyance accuracy can be improved. Further, since the guide members 4A and 4B prevent the skew of the roll sheet 10 on the upstream side of the platen roller 21 in the left-right direction, the accuracy of sheet conveyance in the longitudinal direction of the roll sheet 10 is improved. Can be planned. Thereby, the skew of the roll sheet 10 in the left-right direction is further prevented by the cooperation of the guide members 4A, 4B and the paper discharge side rollers 88A, 88B of the transport roller unit 37.
The accuracy of sheet conveyance in the longitudinal direction of the roll sheet 10 can be further improved.

When the roll sheet 10 having release paper adhered to one side of the film sheet via an adhesive is conveyed, when a large amount of adhesive adheres to each of the guide members 4A and 4B, the respective guide members Since 4A and 4B can be exchanged, the sheet conveyance accuracy can be maintained with high accuracy. In addition, since each of the guide members 4A and 4B is a resin molded product such as polyacetal to which an adhesive is not easily adhered, when the roll sheet 10 having a release paper adhered to one side of a film sheet via an adhesive is transported. In addition, it is possible to prevent the adhesive from adhering to the guide members 4A and 4B, and to maintain the sheet conveyance accuracy with higher accuracy. Further, only the second guide member can be formed of an expensive material to which the adhesive is unlikely to adhere, and the manufacturing cost of the tape printer can be reduced.

When the cutter unit 60 is conveyed to the edge of the cutter blade 62 by rotation of the lead screw 66 or the like, the lower end surface of the cutter cap 63 provided on the upper portion of the cutter blade 62 has a roll sheet. 1
The cutter blade 62 can smoothly cut the roll sheet 10 by pulling the roll sheet 10 below the upper surface of the cutter plate 35 to eliminate the slack of the roll sheet 10. Further, since the cutter blade 62 is provided such that the cutting edge side is inclined with respect to the roll sheet 10 in the transport direction on the cutting side, fluffing of the roll sheet 10 occurs in the lower side of the printing surface, and a good printing surface is formed. can do.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various improvements and modifications can be made without departing from the spirit of the present invention.

[0076]

As described above in detail, in the tape printing apparatus according to the first aspect, the roll sheet wound around the cylindrical core is the first sheet arranged on the upstream side of the transport path of the roll sheet. The paper is conveyed by rollers and a second roller disposed downstream of the conveyance path to print characters and the like. Further, the drive of the driving means constituting the transport means is transmitted to the first roller and the second roller via a drive transmission member, and after the second roller is started to rotate via the drive transmission member, the first roller is driven. The rotation is transmitted to start. Thus, after the roll sheet on the downstream side of the first roller in the transport path is pulled out by the second roller, the roll sheet is sequentially pulled out by the second roller and the first roller.
Provided is a tape printing apparatus capable of removing slack of a roll sheet between a roller and a second roller, effectively preventing skew of the roll sheet, and improving sheet conveyance accuracy. it can. Further, since the drive transmission member can start rotation of the first roller after rotation of the second roller by a simple mechanism configuration via a planetary gear or the like, a tape printing apparatus capable of reducing the size of the drive transmission member can be provided. Can be provided.

According to a second aspect of the present invention, in the tape printing apparatus according to the first aspect, the drive transmission member rotates the first roller at a predetermined rotation speed more than the rotation speed of the second roller. The driving of the driving means is transmitted so as to drive at a low speed. As a result, the roll sheet between the first roller and the second roller is apparently given an appropriate tension by the second roller, so that the slack of the roll sheet between the first roller and the second roller is removed. Thus, it is possible to provide a tape printing apparatus capable of effectively preventing skewing of a roll sheet or the like and improving sheet conveyance accuracy.

According to a third aspect of the present invention, in the tape printing apparatus according to the first or second aspect, the transporting means is disposed downstream of the second roller in the transporting path. The third roller is driven via the drive transmission member. Further, first sheet guide members are arranged at predetermined intervals below the third roller. Further, a plurality of sheet pressing members extending outward at a predetermined angle are provided on the outer peripheral surface of the third roller. Further, the sheet pressing member is configured to come into contact with the roll sheet with a predetermined pressing force when the roll sheet is transported. Then, the third roller is driven while pressing the roll sheet against the first sheet guide member with a predetermined pressure via the sheet pressing member. Thus, the roll sheet downstream of the second roller is gripped by the sheet pressing member and the first sheet guide member formed on the outer peripheral surface of the third roller, and the roll sheet is discharged only by the third roller. Therefore, it is possible to reduce the size of the transport mechanism by eliminating the pinch rollers and the like, to remove the slack of the roll sheet between the second roller and the third roller, and to reduce the skew of the roll sheet. It is possible to provide a tape printing apparatus capable of effectively preventing and improving sheet conveyance accuracy.

According to a fourth aspect of the present invention, in the tape printing apparatus according to the third aspect, the first sheet guide member has a plurality of recesses formed at predetermined positions immediately below the third roller. And the tip of the sheet pressing member enters the recess. When transporting a roll sheet,
Since the third roller is pressed against the first guide member with a predetermined pressing force, the sheet pressing member is deformed, but the amount of deformation of the sheet pressing member is smaller than when there is no concave portion. When the amount of deformation of the sheet pressing member is large, the sheet pressing member is deformed due to aging, and the effect of the tape printing apparatus according to claim 3 is gradually weakened, and finally the effect cannot be obtained. Accordingly, the amount of deformation of the sheet pressing member is reduced, the temporal deformation of the sheet pressing member is prevented, and the above effects can be continuously obtained.

In the tape printing apparatus according to a fifth aspect of the present invention, in the tape printing apparatus according to the fourth aspect, since the recess is a through hole, the processing of the first sheet guide member is facilitated, and It is possible to provide a tape printing apparatus capable of increasing the radial length of the sheet holding member and increasing the pressing force of the roll sheet.

According to a sixth aspect of the present invention, in the tape printing apparatus according to any one of the third to fifth aspects, the sheet pressing member has a substantially flat plate shape having a predetermined width. Are formed at predetermined intervals on the outer peripheral surface of the second roller and the third roller and the third roller by appropriately changing the thickness of the sheet pressing member in the radial direction. It is possible to provide a tape printing apparatus capable of improving the sheet conveyance accuracy by removing the slack of the roll sheet between the roller and the roller.

According to a seventh aspect of the present invention, in the tape printing apparatus according to any one of the third to sixth aspects, the transporting means can transport the roll sheet back and forth in the longitudinal direction. . In addition, the third roller receives the drive from the drive transmission member via the clutch means. When discharging the roll sheet, the drive of the drive transmission member is transmitted to the third roller,
When the roll sheet is pulled in, the drive of the drive transmission member is shut off and the third roller is stopped. Accordingly, when the roll sheet is pulled in, the roll sheet is pulled in while being pressed by the first sheet guide member by the sheet pressing member of the third roller, so that the slack of the roll sheet upstream of the third roller is removed. Thus, it is possible to provide a tape printer capable of improving the sheet conveyance accuracy.

In the tape printing apparatus according to the eighth aspect, in the tape printing apparatus according to any one of the third to seventh aspects, the first sheet guide member is provided on an upper surface of the first sheet guide member. There is provided a first guide member which is arranged to face the roll sheet at an interval substantially equal to the width dimension of the roll sheet, has an inner facing surface formed at a predetermined height, and guides the roll sheet along the transport path. In addition, the third
The roller is provided with an outer pressing portion which is provided on the outer peripheral surface at a position opposed to the vicinity of the inside of the left and right end edges of the roll sheet at a predetermined width in the axial direction and protrudes outward in the radial direction.
Accordingly, the skew of the roll sheet conveyed by the third roller and the first sheet guide member in the left-right direction is prevented by the first guide member, and the right and left edges of the roll sheet are pressed outward. Since the roll sheet can be held down by the section, it is possible to provide a tape printing apparatus capable of improving the sheet conveyance accuracy in the longitudinal direction of the roll sheet.

According to a ninth aspect of the present invention, in the tape printing apparatus according to any one of the first to eighth aspects, the right and left sides of the roll sheet are located upstream of the second roller in the transport path. A second guide member is provided on each lower surface of both side edge portions, and the respective lower surfaces are in sliding contact with each other. Each of the second guide members has a projecting portion of a predetermined height standing substantially perpendicularly on the upper surface. The distance dimension of each projection in the roll sheet width direction is substantially equal to the width dimension of the roll sheet, and is provided so as to guide the roll sheet along a transport path. Thereby, the skew of the roll sheet on the upstream side of the second roller in the left-right direction is prevented by the second guide member, so that the accuracy of sheet conveyance in the longitudinal direction of the roll sheet can be improved. It is possible to provide a tape printing apparatus that can perform the printing. In addition, the cooperation between the first guide member of the first sheet guide member and the outer pressing portion of the third roller further prevents skew of the roll sheet in the left-right direction. And a tape printer capable of further improving the accuracy of sheet conveyance to the printer.

According to a tenth aspect of the present invention, in the tape printer of the ninth aspect, the second guide member is detachably provided. Accordingly, when a roll sheet having release paper adhered to one side of a film sheet via an adhesive is conveyed, if a large amount of adhesive adheres to the second guide member, the second guide member is replaced. Therefore, it is possible to provide a tape printer capable of maintaining the sheet conveyance accuracy with high accuracy.

In the tape printing apparatus according to the eleventh aspect, in the tape printing apparatus according to the ninth or tenth aspect, the second guide member is a resin molded product of a predetermined material to which an adhesive is unlikely to adhere. Therefore, when a roll sheet having release paper adhered to one side of a film sheet via an adhesive is conveyed, adhesion of the adhesive to the second guide member is prevented, and sheet conveyance accuracy is further improved. It is possible to provide a tape printing apparatus that can be maintained at the same time. Further, it is possible to provide a tape printing apparatus in which only the second guide member can be formed of an expensive material to which an adhesive does not easily adhere, and the manufacturing cost of the tape printing apparatus can be reduced.

According to a twelfth aspect of the present invention, in the tape printing apparatus according to any one of the first to eleventh aspects, a cutting blade is provided downstream of the second roller in the transport path. A cutter member is arranged and reciprocated in the width direction of the roll sheet by the cutter conveying means. A second sheet guide member is provided downstream of the cutter member in the transport path and has an upstream end surface facing the cutting blade. And, the cutter member is provided with a pressing member above the cutting blade,
The lower end surface of the cutting edge of the cutting blade of the pressing member is formed so as to be located below the upper surface of the second sheet guide member by a predetermined dimension. Accordingly, when the cutter member is conveyed to the blade edge side of the cutting blade by the cutter conveying means, the blade edge side lower end surface of the pressing member provided above the cutting blade of the cutter member moves the roll sheet to the second sheet guide member. The cutter member is pulled down below the upper surface of the roll sheet to eliminate the slack of the roll sheet, so that the cutter member can provide a tape printer capable of cutting the roll sheet smoothly.

Further, in the tape printing apparatus according to the thirteenth aspect, in the tape printing apparatus according to the twelfth aspect, the cutting blade is provided so that the cutting edge side is inclined with respect to the roll sheet in the cutting side transport direction. It is possible to provide a tape printing apparatus in which fluff of a roll sheet is generated in a lower direction of a printing surface and a good printing surface can be formed.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a schematic configuration of a main body housing of a tape printing apparatus according to an embodiment.

FIG. 2 is a plan view illustrating a schematic configuration of a main body housing of the tape printing apparatus according to the embodiment.

3A and 3B show an internal structure of the tape printing apparatus according to the present embodiment, wherein FIG. 3A is a perspective view from the second gear train side, and FIG. 3B is a side view on the second gear train side.

4A and 4B show the internal structure of the tape printing apparatus according to the present embodiment, wherein FIG. 4A is a perspective view from the first gear train side, and FIG. 4B is a side view on the first gear train side.

5A and 5B show the internal structure of the tape printing apparatus according to the embodiment when the upper frame is removed, wherein FIG. 5A is a perspective view from the first gear train side, and FIG. FIG.

FIG. 6 is a second view showing a case where the upper frame of the tape printing apparatus according to the embodiment is removed and a ribbon cassette is mounted.
It is a perspective view from a gear train.

FIG. 7 is a front view showing a state in which a thermal head constituting an image forming mechanism of the tape printing apparatus according to the embodiment is released from a platen roller.

FIG. 8 is an enlarged front view showing a configuration of a second gear train of the tape printing apparatus according to the embodiment.

FIG. 9 is a diagram illustrating a cutting mechanism of the tape printing apparatus according to the embodiment with a discharge roller unit removed.
(A) is a plan view, (B) is a BB cross-sectional view in (A), and (C) is a view on arrow C in (A).

FIG. 10 is a front sectional view showing a carriage mechanism of the cutting mechanism of the tape printing apparatus according to the embodiment.

FIGS. 11A and 11B are diagrams showing driving of the cutting mechanism of the tape printing apparatus according to the embodiment by the second gear train, and FIG.
FIG. 4 is a partially enlarged front view showing driving when the roll sheet is cut, and FIG. 4B is a partially enlarged front view showing driving when moving the home position.

FIGS. 12A and 12B show a discharge roller unit of the tape printing apparatus according to the embodiment, wherein FIG. 12A is a front view, and FIG.

13A and 13B are diagrams illustrating a configuration of a first gear train of the tape printing apparatus according to the present embodiment, wherein FIG. 13A is an enlarged front view illustrating a roll sheet rewinding operation, and FIG. It is an enlarged front view which shows the time of operation.

FIG. 14 is a diagram showing a configuration of a portion for driving a platen roller and a grip roller of a first gear train at the time of printing of the tape printing apparatus according to the embodiment, and FIG. (B) is an enlarged partial front view showing a printing operation.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 tape printing device 2 main body housing 3 upper frame 5, 6 side wall 7 lower frame 10 roll sheet 11 roll unit 15 transport mechanism 16 cutting mechanism 17 image forming mechanism 21 platen roller 22 grip roller 23 driven roller 25 first gear Row 27 Thermal head 28 Second gear row 37 Transport roller unit 60 Cutter unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B65H 35/06 B65H 35/06 (72) Inventor Toshihiro Takahashi 15-1 Nashiro-cho, Mizuho-ku, Nagoya Brother Industries Inside (72) Inventor Yasuhiro Ogawa 15-1, Naeshiro-cho, Mizuho-ku, Nagoya-shi Inside Brother Industrial Co., Ltd. (72) Inventor Shigemi Kato 15-1 Naeshiro-cho, Mizuho-ku, Nagoya-shi F-term in Brother Industries, Ltd. (Reference) 2C058 AB02 AC06 AC15 AE04 AF20 AF23 AF51 LA03 LA07 LA09 LA39 LB06 LB17 LB40 LC11 2C060 BA03 BB13 BC02 BC03 BC04 BC13 BC15 BC34 BC35 BC38 BC47 3C027 GG02 GG04 GG08 GG09 3F103 AA02 BA04 BA12 FA04A

Claims (13)

[Claims] 1. A tape printing apparatus provided with a transport unit for transporting a long roll sheet wound around a cylindrical core, wherein the transport unit is located upstream of a roll sheet transport path. A first roller disposed, a second roller disposed downstream of the transport path, a driving unit, receiving driving of the driving unit, and transmitting the driving to the first roller and the second roller. And a drive transmission member, wherein the drive transmission member transmits the drive of the driving means so as to start the rotation of the first roller after the rotation of the second roller. 2. The apparatus according to claim 1, wherein the drive transmission member transmits the drive of the drive unit such that the rotation speed of the first roller is lower than the rotation speed of the second roller by a predetermined rotation speed. 2. The tape printer according to 1. A third roller disposed downstream of the second roller in the transport path and driven via the drive transmission member; a predetermined distance below the third roller; A third sheet roller having a plurality of sheet pressing members extending obliquely outward at a predetermined angle on an outer peripheral surface; The tape printer according to claim 1, wherein the tape printer contacts the roll sheet with a predetermined pressing force when the roll sheet is transported. 4. The first sheet guide member has a plurality of recesses formed at predetermined positions immediately below the third roller,
4. The tape printing apparatus according to claim 3, wherein a leading end of the sheet pressing member enters the recess. 5. The tape printer according to claim 4, wherein the recess is a through hole. 6. The sheet pressing member according to claim 3, wherein the sheet pressing member is formed in a substantially flat plate shape with a predetermined width and at a predetermined interval on an outer peripheral surface of the third roller. Tape printing equipment. 7. The third roller has a clutch unit, wherein the conveying unit can convey the roll sheet back and forth in the longitudinal direction, and the clutch unit discharges the roll sheet. The driving of the drive transmission member is performed by the third
7. The transmission to the roller and, when the roll sheet is pulled in, the drive of the drive transmission member is shut off to stop the third roller.
The tape printing device according to any one of the above. 8. The first sheet guide member is disposed on the upper surface of the first sheet guide member at an interval substantially equal to the width of the roll sheet, and has an inner facing surface formed at a predetermined height. A first guide member for guiding the roll sheet along a transport path, wherein the third roller has a predetermined width in the axial direction on an outer peripheral surface at a position facing near the inner side of both right and left edges of the roll sheet. The tape printing apparatus according to any one of claims 3 to 7, further comprising an outer pressing portion provided so as to protrude outward in the radial direction. 9. A second guide member disposed on each lower surface of both right and left side edges of the roll sheet on the upstream side of the second roller in the transport path, and the lower surfaces are in sliding contact with each other; The two guide members have projections of a predetermined height standing substantially perpendicularly on the upper surface, and the distance dimension of each projection in the roll sheet width direction is substantially equal to the width dimension of the roll sheet. 9. The tape printing apparatus according to claim 1, wherein the tape printing apparatus is provided to guide the roll sheet along a transport path. 10. The tape printer according to claim 9, wherein the second guide member is detachably provided. 11. The tape printing apparatus according to claim 9, wherein the second guide member is a resin molded product of a predetermined material to which an adhesive does not easily adhere. 12. A cutter member disposed downstream of a second roller of the transport path and provided with a cutting blade; cutter transport means for reciprocating the cutter member in the width direction of the roll sheet; A second sheet guide member disposed downstream of the cutter member and having an upstream end face portion facing the cutting blade, wherein the cutter member has a pressing member provided above the cutting blade. The lower end surface of the cutting edge of the cutting blade of the pressing member is formed so as to be located a predetermined dimension below the upper surface of the second sheet guide member.
The tape printer according to any one of claims 1 to 7. 13. The tape printing apparatus according to claim 12, wherein the cutting blade is provided so that a cutting edge side is inclined in a cutting side conveyance direction with respect to the roll sheet.