CN2719577Y

CN2719577Y - Printer

Info

Publication number: CN2719577Y
Application number: CN 200420059370
Authority: CN
Inventors: 高见彻; 广池豪
Original assignee: Seiko Epson Corp
Current assignee: Seiko Epson Corp
Priority date: 2003-05-22
Filing date: 2004-05-21
Publication date: 2005-08-24
Anticipated expiration: 2014-05-21
Also published as: HK1071724A1; CN1276838C; JP4251014B2; CN1572526A; JP2004345210A

Abstract

The utility model relates to a printer (1) which is provided with a thermosensitive head (H) for printing on a recording sheet (S), a cutting device (30) capable of partially cutting the recording sheet (S) and a platen roller 20 which can convey the recording sheet (S) in a positive direction and an opposite direction from the printing position of the thermosensitive head (H) to the cutting position of the cutting device (30). After the recording sheet (S) is partially cut by the cutting device (30), the amount of the recording sheet (S) conveyed in the opposite direction by the platen roller (20) is changed according to the stop time of a motor for driving the platen roller (20). Thereby, the blockage of paper sheets generated when the paper sheets are conveyed in the opposite direction can be prevented after the recording sheet is partially cut.

Description

Printer

Technical field

The utility model relates to printer, particularly relates to having function that record-paper is partly cut off and with the printer of the reverse conveying function of record-paper.

Background technology

For example, in POS system in the printer of employed electronic cash register (cash register) etc., be provided with print for the record-paper of roller shape etc. by thermal head after, the shearing device (shut-off mechanism) that this record-paper is cut off.

This shearing device moves according to the cut-out order of carrying to printer from host apparatus, after printing end of a period record-paper is cut off, thereby this record-paper can be issued as receipt.

In having the printer of this shearing device, between position of printing and position, certain distance is arranged by the shearing device cut-out to record-paper.So, cut off the back when this device beginning is printed next time at the record-paper that printing is over by shearing device, will produce the blank that is equivalent to above-mentioned distance at cut-out edge, top to the position that begins to print from record-paper.This blank can cause the extra consumption of printing paper, and the outward appearance of receipt is affected.

Therefore, the method that reduces as the blank that makes such data top, for example, after having considered to be over, record-paper having been cut off, with record-paper (i.e. the direction of returning to print position from the off-position of shearing device) method (for example with reference to patent documentation 1) of carrying round about by shearing device in printing.

According to this method, cut off the amount that the edge is carried round about to the distance shortening of beginning print position owing to can make, so the top blank of the data of printing is reduced next time from the top of record-paper.

And, such printer that has shearing device, for example under situation about using under the environment for use that high temperature wets more, the surface of record-paper can produce is clamminess, and occurrence record paper adheres to the first-class problem of temperature-sensitive of waiting for print state easily.Like this, if taking place to begin printing under the state that adheres to, then the conveying devices such as platen of fed printing sheet just can not normally be carried, and produce the problem that print quality significantly descends.

Therefore, considered printing paper oppositely to be carried earlier, begun again after the record-paper that adheres to thermal head is peeled off to print, as the countermeasure that adheres to thermal head for record-paper by when the power connection of printer or before beginning to print.

Patent documentation 1: the spy opens flat 10-193712 communique

Yet, in the above-mentioned shearing device that printer had, also have and carry out and will print the device of the partial cutoff of the residual cut-out of record-paper part after ending.Under the situation of carrying out partial cutoff, can prevent falling naturally of the receipt that cuts off etc., and receipt be torn by the operator.

But, before printing is about to begin, printing paper is oppositely carried having implemented, under the situation of the printer of the above-mentioned countermeasure that record-paper is adhered to that begins again after the printing paper that adheres to thermal head peeled off to print, when so continuous receipt of implementing of " printing and partial cutoff " processing is issued continuously, also have owing to the part residual by partial cutoff oppositely carried situation about cutting off.

This is because under the situation of the partial cutoff of an end that carries out part residual recording paper, the lower limb of cut another distolateral receipt is a free state, so when oppositely carrying, tangled by ejection port parts nearby easily.

And the receipt that also has previous distribution to cut off is inhaled into the ejection port of printer and the situation that paper stops up takes place.

The utility model content

The purpose of this utility model is to address the above problem, and provides a kind of after record-paper partly cuts off, and can prevent the printer that paper stops up when oppositely carrying.

In order to reach the purpose of this utility model, one of the utility model is to have the thermal head that prints on record-paper, the shearing device that described record-paper partly can be cut off, and the printer that described record-paper can be carried out the conveying device of two-way conveying to first direction and the second direction opposite with this first direction, it is characterized in that: have after described record-paper partly being cut off, change the control device of the amount of record-paper being carried to described second direction according to the conveying of described conveying device action dwell time by this conveying device by described shearing device.

According to one of above-mentioned the utility model, can be after record-paper partly cut off, change the amount of record-paper being carried to described second direction according to the conveying action dwell time of conveying device by this conveying device.And the adhesion that record-paper is pasted on the thermal head is slightly proportional with the conveying action dwell time of conveying device in the early stage.

Therefore, the amount of carrying to second direction for the adhesion that prevents record-paper becomes the optimal transport amount of the adhesion that overcomes record-paper, just can will not make the above record-paper of needed amount carry the residual fraction of the record-paper that also partly cuts off to cut off to second direction, or record-paper positively can not be peeled off from thermal head because of the deficiency of conveying capacity, can prevent the obstruction of paper thus.

Also have, two of the utility model is in the described printer of one of the utility model, under the described conveying action dwell time situation shorter than the stipulated time, the amount that record-paper is carried to described second direction is set at not the amount that the part by the record-paper of described shearing device cut-out does not rupture.

According to two of the utility model, carrying under the action dwell time situation shorter than the stipulated time, the amount of carrying to second direction for the adhesion that prevents record-paper becomes the minimal conveying capacity that overcomes the record-paper adhesion, record-paper can not done conveying more than the needed amount to described second direction.

And, to carry under the action dwell time situation longer than the stipulated time, the amount of carrying to second direction for the adhesion that prevents record-paper becomes the sufficient conveying capacity that overcomes the record-paper adhesion.

Therefore, can easily change amount according to the conveying action dwell time of conveying device to the second direction feeding recordable paper.

Also have, three of the utility model is in the two described printers of the utility model, under the described conveying action dwell time situation shorter than the stipulated time, the amount that record-paper is carried to described second direction is set at not the amount that the part by the record-paper of described shearing device cut-out does not rupture.

According to three of above-mentioned the utility model, carry the action dwell time than the short situation of official hour under, the amount that record-paper is carried to described second direction is set at the amount that the residual part of the record-paper that part cuts off is not ruptured, and becoming the conveying capacity that neither fracture can fully overcome adhesion again.

Therefore, even carry the action dwell time than the short situation of official hour under, the not enough and situation about the record-paper of part cut-out positively can not be peeled off from thermal head of conveying capacity can not take place yet.And, can also the amount that this record-paper is carried to described second direction be carried out the best set according to the length of part cut-out and the fracture strength of record-paper etc.

Description of drawings

Fig. 1 is the sectional view of printer structure in embodiment in expression the utility model.

Fig. 2 is the amplification sectional view of major part of the off-position of expression print position of printer shown in Figure 1 and record-paper.

Fig. 3 is the plane of the shearing device of expression printer shown in Figure 1.

Fig. 4 is the system construction drawing of printer shown in Figure 1.

Fig. 5 represents in the present embodiment, has accepted partly to cut off the flow chart of the flow process of the processing of carrying out under the situation of order.

Symbol description: 1-printer, 20-platen (conveying device), 30-shearing device, H-thermal head, S-record-paper.

The specific embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is illustrated.

Fig. 1 is the sectional view of printer structure in embodiment in expression the utility model.Fig. 2 is the amplification sectional view of major part of the off-position of expression print position of printer shown in Figure 1 and record-paper.

As shown in Figures 1 and 2, the printer 1 of present embodiment, it is employed printer in employed electronic cash register etc. in POS system etc., for the record-paper S of for example roller shape being printed, constitute record portion 2 substantially forwardly, constitute the storage portion 3 of accommodating the paper S that holds the record in the wings by thermal head H.

As shown in Figure 2, in described record portion 2, be provided with thermal head H, platen (platenroller) 20, and shearing device 30.Described record-paper S is from as passing through between the thermal head H of print position and the platen 20, and then from as passing through between the movable blade 9 of the shearing device 30 of record-paper off-position and the fixed blade 14, leads to the top.

And, the device body of printer 1, on the body frame 7 that for example constitutes by metal, but the cutting unit framework 11 that the cover frame frame 8 of freely openable is being set and is accommodating movable blade 9 and driving mechanism thereof, and the institutes such as panel 5 that are installed in the chamber body 4 that is made of for example resin cover.

Described cover frame frame 8 can be the installation that freely openable is carried out at the center with the fulcrum set in the upper end, both sides of body frame 7 12.

In the printer 1 of present embodiment, as shown in Figures 1 and 2, the end of cutting unit framework 11 sides on cover frame frame 8 disposes fixed blade 14.

This fixed blade 14 is made of the plate-shaped member of for example metal long plate shape, constitutes shearing device 30 (with reference to Fig. 3) with movable blade 9.

And the blade 14a of fixed blade 14 disposes in the face of cutting unit framework 11.Also have, between the bottom 11b of the blade 14a of fixed blade 14 and cutting unit framework 11, be provided with the slit-shaped ejection port 15 that is used for record-paper S is carried discharge.

Described platen 20 is by applying spring force by elastic force apparatus such as spring mechanism (not shown), with the women's head-ornaments pushing of record-paper S to thermal head H.Thermal head H is provided with and the corresponding heater element of each print pixel, by the heating of these heater elements record-paper S is printed.

Driving mechanisms (not shown) such as the rotating shaft of platen 20 and motor are connected, and by this driving mechanism platen 20 are driven to the both direction rotation.Conveying device is platen 20 rotation when driving, record-paper S because and the friction between the platen 20, and according to the direction of rotation of platen 20, draw upwards (promptly towards shearing device 30) or the direction opposite with it carried from roller.Below, the direction that record-paper S is carried to off-position from print position and this moment platen 20 direction of rotation be called positive direction, the direction opposite with it is called in the other direction.

When printing receipt, carry out a line printing by thermal head H after, by repeating that record-paper S is carried the distance that only is equivalent to delegation to positive direction, can carry out the printing of multirow.And, after printing is over, cutting off by will print final row by shearing device 30, the record-paper S that printing can be over issues as receipt.

As shown in Figure 3, constitute the movable blade 9 of shearing device 30 in the present embodiment, can be being the center at the set for example fulcrum 18 of a square end portion of cutting unit framework 11, install freely to rotate to the direction of the arrow A of Fig. 3 or opposite direction.

Also have,, be provided with the slotted hole 19 that is used for driving this movable blade 9 by the set driving mechanism (not shown) in the back side at the lid 11a of cutting unit framework 11 in the substantial middle of described movable blade 9.

And as shown in Figure 3, in the shearing device 30 of present embodiment, the length setting of movable blade 9 must be lacked the distance D of regulation than the blade 14a of fixed blade 14, so that record-paper S can not cut off fully.

Therefore, when the arrow A direction drove, record-paper S can residually be equivalent to the part of predetermined distance D and be cut off (part is cut off) in movable blade 9.Like this, shearing device 30 just has the function of carrying out the part cut-out.

Also have, the structure of shearing device also is not limited only to the structure of scissors form of the shearing device 30 of present embodiment as shown in Figure 3, also can use other forms of shearing device.And, neither only limit to only to have the structure that part is cut off function, also can be to have part to cut off structure with two kinds of functions cutting off fully.

Fig. 4 is the system construction drawing of printer 1.As shown in the drawing, printer 1 is provided with CCU (CPU) 50.CPU50 is connected by the main frame 51 of interface 52 with the outside.

Printer 1 also is provided with ROM54, RAM56, print control section 58, cuts off control part 60, carries control part 62, covers test section 64, paper feeding switch 66 etc., and these parts are connected with CPU50.

Store various control programs and printing matrix among the ROM54.And, in RAM56, be provided with the buffer of accepting that is used to keep the order accepted from main frame 51 and print data.And then the above-mentioned thermal head H of print control section 58 controls according to the indication from CPU50, is printed record-paper S by thermal head H.

Cut off the driving mechanism of the movable blade 9 of the above-mentioned shearing device 30 of control part 60 controls,, carry out part by 30 couples of record-paper S of shearing device and cut off according to indication from CPU50.

Carry the driving mechanism of the above-mentioned platen 20 of control part 62 controls,, record-paper S can be carried out to positive direction and reciprocal two-way conveying by according to platen 20 being carried out positive direction or reciprocal driving from the indication of CPU50.

Lid test section 64 comprises the sensor of the open and-shut mode that detects cover frame frame 8, with the open and-shut mode notice CPU50 of cover frame frame 8.And paper feeding switch 66 is arranged at guidance panel, and during this switching manipulation, CPU50 is by carrying control part 62 that platen 20 is driven to the positive direction rotation.

As mentioned above, the printer 1 of present embodiment can carry out part by 30 couples of record-paper S of shearing device and cut off, and, can be by platen 20 with record-paper S to positive direction and two-way conveying in the other direction.These actions are to carry out according to the control command that is sent from main frame 51.Also have, in following record, record-paper S is called reverse paper feeding to the action of carrying in the other direction.

Also have, CPU50 in the printer 1 of present embodiment, by explaining the order of accepting from main frame 51, cut off orders such as order according to print command and part, to print control section 58, cut off control part 60, and carry control part 62 to apply control signal, to print, part is cut off, and reverse paper feeding etc. control.

And then, described CPU also comprises the function with conveying action dwell time (for example motor dwell time) in the driving mechanism that the measurement conveying device is a platen 20, according to the result that this Measuring Time was compared with the predefined stipulated time, can change by carrying control part 62 with the control device of platen 20 to the driving amounts such as motor of opposite spin driving.

Here, for example measurement of motor dwell time, base carries out in the time of for example can utilizing insertion.Since the time base be a direct acting in printer starts, so can often monitor to the motor dwell time.Also have, base when utilizing there is no need to use new timer.Certainly, also can use new timer.

Also have, carry the action dwell time, in the elapsed time after also being not limited to measure motor and stopping, also can measuring by the additive methods such as elapsed time that measure portion is cut off after being over.

Therefore, in the present embodiment, as described below, part is cut off the action of order by control, in the time of can not occurring in reverse paper feeding record-paper S is not carried out the conveying more than the needed amount and the residual fraction of the record-paper S that part cuts off is cut off to opposite direction, or record-paper S can not be peeled off really from thermal head H because of conveying capacity is not enough, can prevent the generation that paper stops up thus.

Fig. 5 represents in the present embodiment, has accepted partly to cut off the flow chart of the flow process of handling under the situation of order.

Also have, processing shown in Figure 5 is to carry out the control program of storing by CPU50 in ROM54 to realize.As shown in the figure, accepting under the situation that partly cut-out is ordered, at first, in step 100, record-paper S only carries the amount of appointment to positive direction.That is, drive platen 20, send final print line until exceeding off-position, motor stops.

Then, in step 102, begun after the motor stop time measurement, in step 104, carried out part and cut off, become the holding state that takes orders.

And, when the holding state that takes orders takes orders (step 106), then, in step 108, differentiate paper feeding in the other direction and whether specified " having ".

Its result has specified in the opposite direction paper feeding under the situation of " having ", carries out the processing of step 110.On the other hand, do not specify in the opposite direction paper feeding under the situation of " having ", then do not carry out step 110,112 processing, and in step 120, carry out print processing.

Then, in step 110, differentiate the adhesion countermeasure and whether specified " having " with reverse paper feeding.

Its result adheres to countermeasure in differentiation and has specified under the situation of " having " with reverse paper feeding, carries out the processing of step 112.On the other hand, do not specify with reverse paper feeding under the situation of " having " differentiate adhering to countermeasure, in step 118, that for example carries out 60 steps of paper feeding in the other direction and 7 steps of positive direction paper feeding lifts one's head processing (making the processing of the blank minimizing on receipt top).

Then, in step 112, whether relatively stop institute's elapsed time (motor dwell time) from motor shorter than the predefined stipulated time (be set at 1 fen in the present embodiment, but the setting that the length that can cut off according to part and the fracture strength of record-paper etc. suit).

Its result, the motor dwell time than the short situation of official hour under, in step 114, for example after the adhesion countermeasure of carrying out 13 steps of paper feeding in the other direction and 13 steps of positive direction paper feeding is handled with reverse paper feeding, in step 120 implementation print processing.On the other hand, the motor dwell time than the long situation of official hour under, in step 116, for example after the adhesion countermeasure of carrying out 30 steps of paper feeding in the other direction and 30 steps of positive direction paper feeding is handled with reverse paper feeding, in step 120 implementation print processing.

As mentioned above, in the printer 1 of present embodiment, after carrying out the part cut-out, can be according to the motor dwell time, the amount of the reverse paper feeding during change adhesion countermeasure is handled with reverse paper feeding.

And, because record-paper S adheres to the adhesion of thermal head H, slightly proportional in the initial stage and the motor dwell time that adhere to, so be used to prevent the amount of opposite direction paper feeding of the adhesion of record-paper S, be the optimal transport amount (being to go on foot in 13 steps or 30 in the present embodiment) of the adhesion that overcomes record-paper S.

That is to say, during the continuous distribution of the receipt of carrying out continuously in the processing of " print with part cut off " (dwell time of motor more in short-term than stipulated time), because the adhesion of record-paper S is little, there is no need record-paper S is carried out opposite direction paper feeding more than the needed amount, so the minimum delivery amount (13 step) that do not rupture of the residual fraction of the record-paper S that cuts off for part of paper feeding amount in the other direction.

So the residual fraction of the record-paper S that can part be cut off because of the opposite direction paper feeding does not cut off, can prevent to be pulled to the ejection port 15 of printer 1 and the paper obstruction that takes place by the receipt that this cut-outs is torn up.

Also have, when individual distribution of receipt (when the dwell time of motor is longer than the stipulated time), since the misgivings that have the adhesion of record-paper S to increase, thus the adhesion that can overcome record-paper S adopted, with its sufficient conveying capacity of peeling off from thermal head H really (30 step).

So, can prevent because the deficiency of paper feeding amount and can not positively record-paper S being peeled off from thermal head H in the other direction, or the remarkable decline of print quality when printing.

And then, in the present embodiment,, can easily change the amount of countermeasure that adhere to paper feeding in the other direction in the processing of paper feeding in the other direction by to the dwell time of motor and the comparison of predefined stipulated time.

Also have, under the dwell time of the motor situation shorter than the predefined stipulated time, the amount of the opposite direction paper feeding of record-paper S is set at the amount of the residual fraction fracture of the record-paper S that does not make after part is cut off, can accesses the sufficient conveying capacity that does not take place to rupture and can overcome the adhesion of record-paper S.

In this case, under the dwell time of the motor situation shorter than the stipulated time, the misgivings that can not really record-paper S be peeled off from thermal head H because conveying capacity is not enough with regard to not having.Also have, the length that can cut off according to part and the fracture strength of record-paper S etc. are carried out the best setting to the opposite direction paper feeding amount of this record-paper S.

Also have, printer of the present utility model is not limited to the structure of above-mentioned embodiment, certainly adopts various forms based on main idea of the present utility model.

For example, in the above-described embodiment, be to be the explanation that example is carried out as the situation of the conveying device of feeding recordable paper S, but also can dispose other feeding-in roll as conveying device by platen (platen) with the women's head-ornaments that record-paper S is pressed to thermal head H to adopt platen 20.

Also having, in the above-described embodiment, is that the part of the end of record-paper S is residual and carry out part and cut off, but the residual fraction of part when cutting off also is not limited to an end of record-paper, the part of central authorities that also can residual recording paper and carry out part and cut off.

Also having, in the above-described embodiment, as the adhesion countermeasure in step 114 and step 116, is the example of enumerating that carries out the positive direction paper feeding after the opposite direction paper feeding again (positive direction is a first direction, is second direction in the other direction).The direction of this paper feeding also can be on the contrary (positive direction is a second direction, is first direction in the other direction).In this case, in step 110, differentiate the adhesion countermeasure and whether specified " having " with the positive direction paper feeding.

By above explanation, according to printer of the present utility model, after record-paper is cut off by part, can be according to the conveying action dwell time of conveying device, change is carried record-paper by amount from this conveying device to opposite direction.And record-paper adheres to the adhesion of thermal head, and the conveying action dwell time with conveying device is ratio substantially in the early stage.

Therefore, the amount of carrying to opposite direction in order to prevent record-paper from adhering to, for overcoming the optimal transport amount of record-paper adhesion, can not take place record-paper is carried out the conveying more than the needed amount and the residual fraction of the record-paper of part cut-out is cut off to opposite direction, or can not really record-paper be peeled off from thermal head because of conveying capacity is not enough, can prevent the generation that paper stops up thus.

Claims

1. printer, be to have the thermal head that on record-paper, prints, the shearing device that described record-paper partly can be cut off, and described record-paper can be reached the printer that the second direction opposite with this first direction carried out the conveying device of two-way conveying to first direction, it is characterized in that:

Have after described record-paper partly being cut off, change the control device of the amount of record-paper being carried to described second direction according to the conveying of described conveying device action dwell time by this conveying device by described shearing device.

2. printer according to claim 1 is characterized in that: described first direction is from the print position of the described thermal head direction towards the off-position of described shearing device, described second direction be with described first party in the opposite direction.

3. printer according to claim 1 is characterized in that: described second direction is from the print position of the described thermal head direction towards the off-position of described shearing device, described first direction be with described second party in the opposite direction.