JP3556693B2 - Printer - Google Patents

Description

[0001]
[Industrial applications]
The present inventionIsThe present invention relates to a sheet feeding mechanism for validating sheets in a linter.
[0002]
[Prior art]
Cut sheet paper, rollPaperAnd a type of cut-sheet paper that is generally used for validation and consists of a large number of copy sheets called a multiple.paperA printer that prints each sheet with one print head is disclosed in, for example, Japanese Patent Application Laid-Open No. 4-179563.
[0003]
In this apparatus, a platen and a recording paper pressing roller are provided on an arm, the arm is pivotally supported on the apparatus main body side, and a print head and a recording paper disposed at positions opposed to the arm by operation of a plunger type solenoid. The recording paper path formed between the platen and the recording paper pressing roller provided on the arm and the print head and the recording paper driving roller is opened and closed by swinging contact or separation with respect to the driving roller, and recording is performed. The upper side of the paper path is shared as a sheet discharge port for cut sheet, roll paper, and validation paper, and the lower side of the recording paper path is branched into a recording sheet path for cut sheet paper and a recording paper path for validation paper. The recording paper path of the roll paper is configured to communicate between the print head and the recording paper driving roller in the middle of the path.
[0004]
The paper feed mechanism in this apparatus is composed of an arm having a movable-side plunger-type solenoid, a platen, and a recording-paper pressing roller, and a fixed-side recording paper driving roller.
[0005]
When printing on validation paper, deactivate the plunger to open the recording paper path, insert the paper into the recording paper path of the validation paper from the paper outlet above the recording paper path, and then , The arm is swung, the platen provided on the arm is brought into close contact with the print head, and the recording paper holding roller is brought into contact with the recording paper drive roller, and the print head is operated to perform printing and the recording paper drive roller. Is rotated in the feeding direction to feed the paper.
[0006]
However, when the validation paper is set in front of the print head with the cut paper set in front of the print head and printed, both the cut paper and the validation paper are provided with the recording paper holding roller, the recording paper driving roller, and the like. Therefore, the paper feed of the cut sheet is performed together with the paper feed of the validation.
[0007]
Further, since the platen and the recording paper pressing roller are provided on the movable arm of the paper feed mechanism, the shape of the arm becomes large, and the plunger type solenoid that swings the arm usually has the shape. Large, which requires a mounting space, while plunger solenoids are generally costly.
[0008]
[Problems to be solved by the invention]
An object of the present invention is to enable control of validation paper feed with a single solenoid, and even when cut paper or roll paper is set, only validation paper feed is possible, further reducing manufacturing costs. And space savingsProvide a printerIs to do.
[0009]
[Means for Solving the Problems]
A printer capable of simultaneously printing cut paper or roll paper and validation paper between a platen and a print head and performing printing on the validation paper. For this purpose, a paper feed roller for feeding a cut sheet or roll paper in a predetermined direction, and a validation sheet set between the platen and the print head from the feed direction side of the cut sheet or roll paper are simply transferred. It has a validation roller that feeds the paper in the same direction as the paper or roll paper, and the paper feed roller and the validation roller are driven by a single motor. The validation roller includes an arcuate circumferential surface for contacting and sending the validation paper, and a chord plane forming a gap for inserting the validation paper between the platen and the print head.
In order to drive the validation roller and the paper feed roller in common by a single motor, a configuration in which the validation roller is driven by a power from a rotating shaft that is constantly rotated through a one-way clutch is preferable.
The connection and disconnection of the validation roller and the rotating shaft by the one-way clutch may be performed by turning on and off the power supply to at least one solenoid.
A first friction roller for feeding the cut sheet or roll paper in cooperation with the paper feed roller and a second friction roller for feeding the validation paper in cooperation with the validation roller are provided on the same friction roller shaft. Can be configured to support rotatably on the same axis.
It is preferable that the paper feed roller and the validation roller are arranged downstream of the print head in the paper feed direction.
[0010]
[Action]
A single motor drives the validation roller and the paper feed roller in common. With the chord plane of the validation roller facing the friction roller, A gap for inserting the validation paper is formed between the printer and the printer. The inserted validation paper is sent in the direction opposite to the direction in which the validation paper is inserted by using the circular arc surface of the validation roller, and printing is performed.
[0011]
[0012]
[0013]
[0014]
[0015]
[0016]
[0017]
[0018]
[0019]
[0020]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a validation paper feeding mechanism of a printer according to an embodiment, and FIG. 2 is an exploded perspective view showing the validation mechanism of the printer. The validation paper feed mechanism 1 includes a rotary shaft 3 supported by a mounting plate 6 and constantly driven in a paper feed direction, a ratchet wheel 4 provided with a positioning protrusion 5 for setting an initial position, a validation roller 2, and a rotation roller. It is mounted between the shaft 3 and the validation roller 2 and transmits power from the rotating shaft 3 to the validation roller 2 only when the validation roller 2 rotates in the forward direction for feeding out the paper.Spring clutch 7 (one-way clutch),An armature 11 provided to be swingable on the apparatus main body side opposite to the ratchet wheel 4, engages with the pawl 13 of the ratchet wheel 4 at one pivoting position of the armature 11, and engages with the pawl 13 at the other pivoting position A locking portion 12 provided on the armature 11 that engages with the positioning projection 5 of the validation roller 2 every one rotation, and a tension spring 14 for urging the locking portion 12 of the armature 11 to one swing position. A validation roller comprising an energizing means and an armature driving means comprising a solenoid 15 which is deenergized after the locking portion 12 of the armature 11 is moved to the other swinging position against the urging of the tension spring 14; 2 for validation between the friction roller 8 and the friction roller 8 which is disposed opposite to and supported on the printer side.PaperSend in the sending direction.
[0021]
As shown in FIG. 2, the mounting plate 6 of the validation mechanism 1 has a flat plate shape, has mounting engaging pieces 16 and 16 'on the upper surface side, and supports shaft pieces 17a and 17b on both ends of the lower surface of the mounting plate 6. Are formed integrally. Each of the mounting engagement pieces 16 and 16 ′ includes a base 16 a bent on the upper surface side of the mounting plate 6 and a horizontal portion 16 b formed by further bending the distal end horizontally. A gear support plate 18 is screwed to the outside of one support piece 17b of the mounting plate 6. A solenoid 15 is attached to the mounting plate 6 so as to protrude from the upper surface of the mounting plate 6.
[0022]
The rotating shaft 3 is rotatably supported between the supporting shaft pieces 17a and 17b, and penetrates through the other supporting shaft piece 17b and further passes through the gear support plate 18 as shown in FIG. A gear 40 is mounted on the tip of the rotating shaft 3 penetrating outward from the other shaft piece 17b. The gear 40 is composed of a gear 41 pivotally supported by the gear support plate 18 meshing therewith, a pulley 42 provided coaxially with the gear 41, and a gear train linked to the drive motor 29 of the printer main body 27 as shown in FIG. The transmission means 30 constantly rotates in a direction indicated by an arrow a in FIGS.
[0023]
On the rotating shaft 3, a ratchet wheel 4 integrally provided with a validation roller 2 and a positioning protrusion 5 for setting an initial position of the validation roller 2 is integrally mounted via a spring clutch 7.
[0024]
As shown in FIG.InThe neck clutch 7 has connecting ends 7a and 7b projecting outward in the radial direction at both ends, respectively.7Is smaller than the diameter of the rotating shaft 3 and is rotated together with the rotating shaft 3 by being fitted to the rotating shaft 3 so that when one of the coupling ends 7a and 7b is fixed, the rotating direction of the rotating shaft 31 is changed. Spring clutch7If the winding direction is opposite, the spring clutch7And only the rotating shaft 3 rotates. In FIG. 6, clockwise winding is performed from one connecting end 7a to the other connecting end 7b.
[0025]
As shown in FIG. 6, the ratchet wheel 4 has a circular shaft insertion hole 4a and a spring clutch engagement groove 4b communicating radially with the shaft insertion hole 4a in a radial cross section. The ratchet 4 includes a claw portion 4c on one side in the axial direction and a large-diameter portion 4d on the other side in the axial direction having a larger diameter than the claw portion 4c, and the claw 13 extends in the axial direction along the outer periphery of the claw portion 4c. The positioning protrusion 5 is formed by projecting a part of the periphery of the large-diameter portion 4d toward the claw portion 4c.
[0026]
As shown in FIG. 1, the nail 13 of the nail 4 c is provided at 10 equally divided positions when the circumferential direction of the nail is divided into approximately 11 equal parts in the radial cross section, and only one nail is provided. Omitted. The positioning projections 5 provided on the large diameter portion 4d are provided corresponding to the omitted positions of the claws of the claw portions 4c.
[0027]
The ratchet 4 has a spring clutch in which the rotary shaft 3 is inserted through the shaft insertion hole 4a and which is externally fitted to the rotary shaft 3 in a spring clutch engagement groove 4b provided in radial communication with the shaft insertion hole 4a. The connecting end 7b of the first engaging member 7 is engaged and attached to the rotating shaft 3.
[0028]
The validation roller 2 is configured such that rubber annular bodies 20 are integrally provided on the outer periphery of a support cylinder 19. The support cylinder 19 has a shaft insertion hole 19a through which the rotation shaft 3 is inserted in the axial direction, and has a spring clutch engagement groove, which is equivalent to a spring clutch engagement groove 4b provided in the ratchet wheel 4, at one end thereof. 19b. The peripheral surface of the annular body 20 is formed by the circular arc peripheral surface 9 and the chord plane 10.
[0029]
The validation roller 2 has the rotation shaft 3 inserted through one end of a shaft insertion hole 19 a provided in the support cylinder 19 and the rotation shaft 3 inserted into a spring clutch engagement groove 19 b provided at one end of the shaft insertion hole 19 a. The coupling end 7 a of the spring clutch 7 fitted to the outside is engaged and mounted on the rotating shaft 3.
[0030]
That is, the ratchet wheel 4 and the validation roller 2Spring clutch 7And the rotation shaft 3, the validation roller 2 and the ratchet wheel 4Spring clutch 7Through the validation roller 2Forward direction where paper is fedOnly when rotatingSpring clutch 7Are connected to transmit power from the rotating shaft 3 to the validation roller 2.This is because a one-way clutch is interposed between the validation roller 2 and the rotating shaft 3 for driving the validation roller 2, so that the power of the drive motor for driving the paper feed roller is taken out only when necessary to feed the validation paper. As a result, the paper feed roller 33 and the validation roller 2 can be driven by a single motor, which means that the number of motors used as a printer can be reduced and the cost can be reduced.
[0031]
As shown in FIG. 1, the armature 11 that performs frame feeding by engaging and disengaging with the claw 13 of the ratchet wheel 4 is made of metal and is plate-shaped, and has a spring engagement bent upward at a part of its rear end. The protrusion 66 is formed integrally, and as shown in FIG. 4, the armature 11 is provided with a locking portion 12 that is extended forward only on one side and further protrudes toward the other side. . Further, a solenoid 15 for driving the armature 11 is provided on the upper surface side of the armature 11 so as to face the solenoid.
[0032]
As shown in FIG. 1, the armature 11 is swingably supported on both sides near its rear end below the yoke 15 a of the solenoid 15, and includes a spring engagement convex portion 66 formed on the armature 11 and a solenoid 15. When the tension spring 14 is hung between the spring locking projection 67 protruding from the upper part of the yoke portion 15a and the solenoid 15 is deenergized, the urging force of the tension spring 14 The front portion of the locking portion 12 at the tip of the armature 11 is in contact with and engaged with the claw 13 of the ratchet wheel 4.
[0033]
As shown in FIGS. 3 and 4, the locking portion 12 at the tip of the armature 11 is located at an interference position with the positioning projection 5 provided on the large-diameter portion 4d of the ratchet wheel 4, as shown in FIG. When the solenoid 15 is actuated and the armature 11 is oscillated upward, each time the validation roller 2 makes one rotation, it engages with the positioning projection 5 provided on the ratchet wheel 4.
[0034]
As shown in FIGS. 2 and 5, the validation paper feed mechanism 1 integrally formed with the mounting plate 6 is mounted below the frame cover 21 mounted above the side frame 28 of the printer. As shown in FIG. 2, the frame cover 21 is provided with a rising plate portion 21a extending in the width direction of the printer, a top plate portion 21b continuous from the top of the rising plate portion 21a, and a downwardly extending downward portion from the front of the top plate portion 21b. The hanging plate portion 21c is integrally provided.
[0035]
The top plate 21b is provided with an opening 22 through which a solenoid 15 protruding and attached to the upper surface of the attachment plate 6 of the validation paper feed mechanism 1 is inserted, and the attachment engagement pieces 16, 16 'provided on the attachment plate 6. There are provided engaging holes 23a, 23b integrally formed with engaging grooves 24, 24 for locking the holes. One of the engaging holes 23a is formed to communicate with the opening 22.
[0036]
The hanging plate portion 21c is bent slightly inward from the middle to the lower edge, and is provided with two notches 25a and 25b cut out from the lower edge in a substantially rectangular shape. Is larger than the width of the notch 25b.
[0037]
The validation paper feed mechanism 1 is mounted on the frame cover 21 as follows. The solenoid 15 attached to the mounting plate 6 is inserted from below the frame cover 21 into the opening 22 provided in the top plate 21 b of the frame cover 21, and the two mounting engaging portions 16, 16 'are respectively inserted into the engagement holes 23a and 23b provided in the top plate 21b.
[0038]
Next, the mounting plate 6 is slid to the front hanging plate portion side to insert the base portions 16a, 16a of the mounting engagement portions 16, 16 'into the engagement grooves 24, 24 of the engagement holes 23a, 23b. Thereby, as shown in FIG. 3, the horizontal portion 16b of the mounting engagement portions 16, 16 'is supported on the upper surface of the top plate portion 21b. Thereafter, the leaf spring 26 shown in FIG. 2 is interposed between the rising plate portion 21a of the frame cover 21 and the mounting plate 6, as shown in FIG. As a result, the mounting plate 6 is pressed toward the hanging plate portion 21 and stabilized.
[0039]
In this state,FIG.As shown in FIG. 3 and FIG. 3, the annular members 20, 20 of the validation roller 2 intervene in the notches 25a, 25b provided in the hanging plate portion 21c, respectively, and the peripheral surfaces of the annular members 20, 20 are attached to the hanging plate. It is exposed outside from the part 21c.
[0040]
The frame cover 21 integrated with the validation paper feed mechanism 1 is mounted on the upper surface side of the side frame 28 of the printer main body 27 as shown in FIG. 5, a drive motor 29 is fixed to a side frame 28, and a gear train including gears 50 to 57 meshing with a drive gear 32 mounted on a motor shaft 31, a pulley 58 coaxial with the gear 57, and a gear support. The transmission means 30 is constituted by the timing belt 43 mounted between the pulley 42 and the pulley 42 supported by the plate 18. The gear train composed of the gears 46 to 48 linked to the gear 56 and the gear 49 mounted on the shaft 39 supported by the side plate 45 on the paper feed mechanism main body 44 side constitute the paper feed transmission means 32 on the printer main body side. Is done. The gears 50 to 57, the pulley 58, and the gears 46 to 48 are supported by the side frame 28.
[0041]
As shown in FIG. 4, a paper feed roller 3 is attached to a shaft 39 supported by a side plate 45 on the paper feed mechanism main body 44 side.3It is installed. On the rear side of the shaft 39, a friction roller shaft 34 is supported by the side plate 45 along the shaft 39. The friction roller shaft 34 has friction rollers 8a and 8 for feeding validation paper.b andFriction rollers 8a and 8b(Second friction roller)Between cut sheet paper and roll paperFor sendingThe friction roller 35 (first friction roller)Each is rotatable with respect to the shaft 34It is pivoted.The friction rollers 8a and 8b press against the variation roller 2 fitted on the rotating shaft 3,The friction roller 35 is pressed against a paper feed roller 33 mounted on a shaft 39. Reference numeral 59 denotes a paper guide.
[0042]
Validation roller2Are arranged to face the friction rollers 8a and 8b, and the arcuate peripheral surface 9 of the validation roller 2 for sending out the validation paper is pressed against the friction rollers 8a and 8b. As shown in FIG. 7, the chord plane 10 of the validation roller 2 is separated from the friction rollers 8a and 8b when facing the friction rollers 8a and 8b, and the chord plane 10 of the validation roller 2 and the friction roller 8a. , 8b, a validation paper insertion opening 36 is formed.
[0043]
FIG. 7 is a schematic side sectional view of the printer. A paper feed mechanism main body 44 is supported between the side frames 27 with a gap above the base 60 fixed between the side frames 27. A paper path 61 for cut paper or roll paper is formed between the paper feed mechanism frame main body 44 and the lower surface thereof. Near the rear end of the upper surface of the base body 60, a paper guide portion 62 is formed that protrudes in a hyperbolic cross section. Near the rear end of the lower surface of the paper feed mechanism main body 44, an arc-shaped peripheral portion 63 is formed along the paper guide portion 62 formed on the base 60.
[0044]
PlatenBoard 64Is supported in contact with the rear surface of the paper feed mechanism main body 44, and a print head 65 is movably provided along the platen plate 64 surface. Near the lower edge of the platen plate 64, a paper guide plate 37 is provided to be supported by the printer main body 27 in the vertical direction. The paper guide plate 37 has an upper edge side of the back surface closely contacting the platen plate 64 and a validation sheet bent obliquely upward near the lower edge of the front side facing the print head 65 side. A plurality of stoppers 38 are provided.
[0045]
When cut paper or roll paper is inserted from the paper insertion opening 66 in front of the paper path 61, it is bent upward along the paper guide portion 62 on the upper surface of the base 60, and the paper guide plate 37 and the platen plate 64 While passing through the gap, the sheet is closely contacted with the surface of the platen plate 64, is pinched between the paper feed roller 33 and the friction roller 35 along the platen plate 64, and is transported in the feed direction.
[0046]
As shown in FIG. 8, when the chord plane 10 of the validation roller 2 faces the friction roller, a validation paper insertion port 36 is formed. In this state, the validation paper is inserted downward from the validation paper insertion port 36. The validation paper passes between the platen plate 34 and the print head 65, and moves downward along the surface side of the paper guide plate 37 because the paper guide plate 37 is pressed tightly against the platen plate 64. The lower end of the paper abuts against the validation paper stopper 38 and is positioned.
[0047]
Next, the operation of the validation paper feed mechanism will be described. First, the initial position setting of the validation roller 2 will be described. When the initial position of the validation roller 2 is set, the validation roller 2 is set without inserting the validation paper into the validation paper insertion port 36 shown in FIG.
[0048]
As shown in FIG. 5, when the driving motor 29 provided in the printer main body 27 rotates, the rotating shaft 3 of the validation roller 2 is shown in the driving gear 32, the transmission means 30, the timing belt 43, the pulley 42, and FIG. The gear 41 is rotated in the direction of arrow a via the gear 40.
[0049]
As shown in FIG. 1, in a state where the solenoid 15 is deenergized, the locking portion 12 at the tip of the armature 11 is urged against the peripheral surface of the ratchet wheel 4 by the urging force of the tension spring 14. It is at one of the swing positions, and the engaging portion 12 is in a state of being engaged with any of the claws 13 of the ratchet wheel 4. In this state, the connection end 7b side of the spring clutch 7 shown in FIG.Loose, Only the rotation shaft 3 is rotated.
[0050]
When setting the initial position of the validation roller 2, the solenoid 15 is energized for a time required for one rotation of the rotating shaft 3 as shown in the timing chart of FIG. When the solenoid 15 is energized, the armature 11 is sucked by the solenoid 15 and swings to the other swinging position above, whereby the engagement of the engagement portion 12 with the claw 13 of the ratchet wheel 4 is released. As a result, the engagement with the spring clutch 7 shown in FIG. 6 is released, and when the spring clutch 7 is tightened, the rotation shaft 3, the ratchet wheel 4 and the validation roller 2 are integrated as shown in FIG. It is rotated in the a direction.
[0051]
When the solenoid 15 is energized for one cycle of the rotating shaft 3, the locking portion 12 of the armature 11 is held at the other upper swing position, and the ratchet wheel 4 rotates in the direction of arrow a during this time. As shown in FIG. 11, the front portion of the locking portion 12 comes into contact with the positioning protrusion 5 provided on the large-diameter portion 4d of the ratchet wheel 4, so that the spring clutch 7 is loosened again and the rotation of the ratchet wheel 4 is stopped. And only the rotating shaft 3 is rotated.
[0052]
The solenoid 15 is deenergized and deenergized after the time required for one rotation of the rotary shaft 3 after being energized, so that the armature is again actuated by the urging force of the tension spring 14 as shown in FIG. The engaging portion 12 at the distal end of the hook 11 is urged by the claw portion 4c of the ratchet wheel 4, and comes into contact with the peripheral surface of the claw portion 4c.
[0053]
Since the positioning projections 5 provided on the large diameter portion 4d are provided corresponding to the positions where the claws of the claw portions 4c are omitted, the locking portions 12 contact the peripheral surface 4e of the ratchet wheel 4 where the claws are omitted. In the contact state, the rotating shaft 3, the ratchet wheel 4 and the validation roller 2 are integrally rotated in the direction of the arrow a, and the front part of the locking portion 12 contacts the pawl 13a for setting the initial position of the validation roller 2. Then, the ratchet wheel 4 and the validation roller 2 are stopped at the initial position.
[0054]
As shown in FIGS. 1 and 7, in the initial position, the chord planes 10, 10 of the annular bodies 20, 20 of the validation roller 2 face the friction rollers 8 a, 8 b on the paper feed mechanism main body 44 side, respectively. , A validation paper insertion slot 36 is formed. As shown in FIG. 8, the validation paper P is inserted from the validation paper insertion slot 36, and is positioned and set in the validation paper stopper 38.
[0055]
Next, validation paper feeding will be described. When the validation paper is fed, the solenoid 15 is moved from the initial position of the validation roller 2 shown in FIG. 1 to the ten claws 13 provided on the ratchet wheel 4 as shown in the timing chart of FIG. The paper is fed by intermittently deenergizing periodically one frame at a time.
[0056]
When the solenoid 15 is energized, the armature 11 is attracted by the solenoid 15 and is swung to the other swinging position above, and the pawl for setting the initial position of the validation roller 2 of the ratchet 4 of the locking portion 12 is set. By releasing the engagement with 13a, the rotating shaft 3, the ratchet wheel 4 and the validation roller 2 are integrally rotated in the direction of arrow a as shown in FIG.
[0057]
Since the solenoid 15 is deenergized and deenergized in a short time after being energized, as shown in FIG. 10, the locking portion 12 at the tip of the armature 11 is again actuated by the urging force of the tension spring 14. The pawl portion 4c of the ratchet wheel 4 is urged to come into contact with the peripheral surface of the pawl portion 4c, so that the validation roller 2 and the ratchet wheel 4 are both rotated in the direction of arrow a, and the front portion of the locking portion 12 is claw 13a Abuts on the next pitch claw 13b and is locked.
[0058]
As shown in FIG. 10, in this state, when the validation roller 2 is rotated, the chord plane 10 of the validation roller 2 moves from a position facing the peripheral surface of the friction roller 8, and instead, the validation roller 2 Is moved to a position where it contacts the peripheral surface of the friction roller 8 so that the validation paper P is sandwiched between the circular peripheral surface 9 of the validation roller 2 and the peripheral surface of the friction roller 8. .
[0059]
Further, the energization and deenergization of the next solenoid 15 are periodically repeated, so that the validation roller 2 and the ratchet wheel 4 rotate integrally with the rotating shaft 3 by a predetermined pitch divided by the claws 13, respectively. The validation sheet P is sent in the sheet feed direction indicated by the arrow b.
[0060]
During this time, the print head 65 performs a printing operation to perform printing, and the print head 65 shown in FIG. 8 is moved along the platen plate 64 by the drive motor 29 shown in FIG. 5 to perform multi-line validation printing.
[0061]
As shown in FIG. 14, when the energizing operation of the solenoid 15 is performed ten times, as shown in FIG. 12, the locking portion 12 of the armature 11 abuts on the peripheral surface 4e of the ratchet wheel 4 from which the claw is omitted. After that, the rotating shaft 3, the ratchet wheel 4 and the validation roller 2 are integrally rotated in the direction of the arrow a, and the front portion of the locking portion 12 sets the initial position of the validation roller 2. , And the ratchet wheel 4 and the validation roller 2 are stopped at the initial position. The chord planes 10, 10 of the validation roller 2 are opposed to the friction rollers 8a, 8b, respectively, and the validation paper insertion port 36 is formed. Therefore, the feeding of the validation paper P is stopped, and the printed validation paper is removed. Pull out the validation paper insertion port 36 upward.
[0062]
The above is one embodiment, and the present invention is not limited to the illustrated embodiment. For example, the validation roller 2 is attached to a shaft 68 disposed in parallel with the rotating shaft 3 as shown in FIG. 15, and a gear and a one-way clutch (spring clutch structure) ) May be interlocked and connected. The one-way clutch transmits power from the rotating shaft 3 to the shaft 68 only when the validation roller 2 is rotated in the forward direction for feeding the paper.
[0063]
【The invention's effect】
Since a chord plane is formed on the validation roller and a gap is provided between the validation roller and the second friction roller so that the validation paper can be inserted into the validation roller, the validation paper can be used without using a mechanism for moving the second friction roller toward and away from the validation roller. A gap for insertion can be made, and the configuration of a printer that can use validation paper in addition to ordinary cut paper and roll paper can be simplified. In addition, the reliability of the device is improved due to the simple configuration.
The rotating shaft that drives the variation roller branches off from the paper feed roller at the end of the power transmission mechanism from the motor, and when necessary, obtains power from this rotating shaft via a one-way clutch. Eliminating the waste of arranging a plurality of similar drive systems can simplify the structure, reduce costs, and save space by downsizing..
Furthermore, since the on / off operation of the one-way clutch can be performed by turning on / off the energization of one solenoid, the structure is simple and highly reliable, and the number of solenoids is reduced to reduce product cost. Can be reduced.
The first friction roller for the paper feed roller (cut sheet paper or roll paper) and the second friction roller for the validation roller are arranged on the same axis, and are independently used for the paper feed roller and the validation roller, so that they can be used separately. By reducing the number of shafts for supporting the rollers, it is possible to simplify the structure and reduce the product cost.
If the validation roller and the second friction roller are arranged downstream of the print head in the paper feed direction, the paper is supported by these rollers until it is discharged, so that a wide range can be accurately printed up to the end of the paper..
[Brief description of the drawings]
FIG. 1 is a side view showing a validation paper feeding mechanism of a printer according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view showing a validation paper feeding mechanism of the printer according to the embodiment of the present invention.
FIG. 3 is a front view showing a validation paper feed mechanism of the printer according to the embodiment of the present invention.
FIG. 4 is a plan view showing a validation paper feed mechanism of the printer according to the embodiment of the present invention.
FIG. 5 is a schematic side view showing a drive transmission mechanism of the printer according to the embodiment.
FIG. 6 is a perspective view showing an engagement relationship among a rotation shaft, a validation roller, and a ratchet wheel.
FIG. 7 is a schematic side view showing a part of the printer according to the embodiment.
FIG. 8 is a schematic side view showing a setting state of cut sheets, roll sheets, and validation sheets in the printer of the embodiment.
FIG. 9 is a diagram illustrating an engagement relationship between a validation roller, a ratchet, and a locking portion of an armature in a validation paper feeding operation.
FIG. 10 is a diagram showing an engagement relationship between a validation roller, a ratchet wheel, and a locking portion of an armature in a validation paper feeding operation.
FIG. 11 is a diagram showing an engagement relationship between a validation roller, a ratchet and an armature engaging portion in a validation paper feeding operation.
FIG. 12 is a diagram showing an engagement relationship between a validation roller, a ratchet wheel, and a locking portion of an armature in a validation paper feeding operation.
FIG. 13 is an operation timing chart showing an initial position setting of a validation roller by a solenoid.
FIG. 14 is an operation timing chart showing validation paper feeding by a solenoid.
FIG. 15 is a sectional view showing a second embodiment of the validation roller.
[Explanation of symbols]
1 Validation paper feed mechanism
2 Validation roller
3 Rotation axis
4 Claw wheel
4a Shaft insertion hole
4b Spring clutch engagement groove
5 Positioning protrusion
6 Mounting plate
7Spring clutch (one-way clutch)
7a Connecting end
7b Connection end
8 Friction roller
9 Arc surface
10 chord plane
11 Armature
12 Locking part
13 claws
14 Tension spring
15 Solenoid
15a Yoke part
16 Mounting engagement piece
16a base
16b horizontal part
17a Support piece
17b Support piece
18 Gear support plate
19 Support cylinder
19a Shaft insertion hole
19b Spring clutch engagement groove
20 Ring
21 Frame cover
21a rising board
21b Top plate
21c hanging plate
22 opening
23a Engagement hole
23b engagement hole
24 engagement groove
25a notch
25b notch
26 leaf spring
27 Printer body
28 Side frame
29 Drive motor
30 Transmission means
31 Motor shaft
32 Paper feed transmission means
33 Paper feed roller
34 friction roller shaft
35 friction roller
36 Validation paper insertion slot
37 Paper Guide Board
38 Validation paper stopper
39 axes
40 gears
41 gear
42 pulley
43 Timing belt
44 Paper feed mechanism body
45 Side plate
46-48 gear
49 gear
50-57 gear
58 pulley
59 Paper Guide
60 base
61 Paper path
62 Paper Guide
63 Circumference
64 platen plate
65 print head
66 Spring locking projection
67 Spring locking projection
68 axes

Claims (5)

A printer capable of simultaneously inserting cut sheet paper or roll paper and validation paper between a platen and a print head and performing printing on the validation paper ,
A paper feed roller for feeding the cut sheet or roll paper in a predetermined direction,
A validation roller for feeding the validation paper set between the platen and the print head from the feed direction of the cut paper or roll paper in the same direction as the feed direction of the cut paper or roll paper. The paper feed roller and the validation roller are driven by a single motor,
The validation roller is characterized by having a chord plane to form a gap for insertion of the validation sheet with arcuate circumferential surface for conveying in contact with the validation sheet between the print head and the platen Printer. Supporting the validation roller via a one-way clutch , and having a rotating shaft that is always driven to rotate when the motor is driven, and driving the validation roller via the one-way clutch with the rotating shaft. The printer according to claim 1, wherein: 3. The printer according to claim 2, wherein the connection and disconnection of the validation roller and the rotation shaft by the one-way clutch are performed by turning on and off the power supply to at least one solenoid. A first friction roller that feeds the cut sheet or roll paper in cooperation with the paper feed roller and a second friction roller that feeds the validation paper in cooperation with the validation roller can be coaxially rotated. The printer according to any one of claims 1 to 3, further comprising a friction roller shaft supported on the printer. The validation roller and the paper feed roller, a printer according to any one of claims 1 to 4, characterized in that disposed downstream of the sheet feeding direction than the print head.

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