CN203666141U - Roller shaft constant pressure structure - Google Patents
Roller shaft constant pressure structure Download PDFInfo
- Publication number
- CN203666141U CN203666141U CN201320614938.3U CN201320614938U CN203666141U CN 203666141 U CN203666141 U CN 203666141U CN 201320614938 U CN201320614938 U CN 201320614938U CN 203666141 U CN203666141 U CN 203666141U
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- China
- Prior art keywords
- roll shaft
- constant pressure
- pressure structure
- compression roller
- roller
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Abstract
The utility model discloses a roller shaft constant pressure structure, wherein a medium is wound on the roller shafts, and a traction force is applied to the medium through friction between the roller shafts and the medium. The constant pressure structure comprises a squeeze roller and a driving mechanism connected with the squeeze roller, wherein the squeeze roller and the roller shafts are arranged in a parallel manner; the driving mechanism comprises mobile frame blocks, check blocks, transmission mechanisms and driving electro-motors; spring-equipped push plates are arranged in the mobile frame blocks, two ends of the squeeze rollers are arranged in the mobile frame blocks and are squeezed by the push plates, the driving electro-motors drive the mobile frame blocks to parallelly move to the positions of the check blocks through the transmission mechanisms, and the squeeze roller is abutted against the roller shafts at the moment. According to the roller shaft constant pressure structure, the friction traction force between the roller shafts and the printing medium can be ensured to be constant, and therefore the printing medium can be output stably. Printing medium deviating, slipping and wrinkling phenomena can be prevented, and printing quality is improved.
Description
Technical field
The utility model belongs to printer technology field, relates in particular to print media constant delivery structure in printer.
Background technology
The field of description is at present mostly inkjet printing, print speed is very low, for a long time could be air-dry after a lot of ink printed, shower nozzle is easy to stop up, printer maintenance trouble, and improving productivity does not get on, and bad adaptability to print media, a lot of printouts all need peritonaeum operation, not only the production process time long, and price is higher.In the prior art in temperature-sensitive field, the operation principle of thermal printer has two kinds: one is to use heat-sensitive paper, thermal printing head heating in print procedure, heat is transmitted on heat-sensitive paper, be heated display text and pattern out due to heat-sensitive paper, be applicable to postal service, fax, retail business etc. and beat the i.e. field of use, but because word and pattern on heat-sensitive paper are easily subject to the impact of environment and time and fade, the shorter application that has limited it of holding time.
Another kind is to use colour band, in print procedure, thermal printing head generates heat and heat is passed on colour band, the thermal transfer ink layer of colour band finishing coat is heated and is transferred on print media, can be on print media printing character and pattern, due to the thermal transfer ink layer rub resistance on print media, corrosion-resistant, heat-resisting, cold-resistant, make the holding time of these words and pattern relatively long, apply more extensive, and owing to having used colour band medium, print media can use plain paper, adhesive sticker series, thin polymer film etc.
But, adopt at present colour band print due to precision reason also cannot precise Printing the coloured image of complicated as description image, conventionally can only be used for the printing of simple pattern, as bar code printing, train ticket printing, luggage check printing etc.For description image field, stamp with the size is conventionally larger in addition, and wide is 1.5 meters, and length can reach tens meters even longer, makes to print accumulated error larger, and therefore existing ribbon printer cannot meet technical requirement far away.Inventor is by repeatedly groping just to find the printing of large-size images in addition, in the time that carry-over pinch rolls draw print media, cause because the frictional force tractive force of carry-over pinch rolls and print media is unstable print media skew, skid and fold, even this unstable error that only causes 0.1mm, but in large scale is printed, can accumulation amplify, thereby will cause the dislocation of print point to affect print quality.
Summary of the invention
Goal of the invention: for the problem and shortage of above-mentioned existing existence, the purpose of this utility model has been to provide a kind of roll shaft constant pressure structure, guarantee that print media stablize tractive force in roll shaft when output traction, thereby avoided print media to be offset, to skid and fold phenomenon.
Technical scheme: for achieving the above object, the utility model is by the following technical solutions: a kind of roll shaft constant pressure structure, on described roll shaft, be wound around medium, and by the frictional force between roll shaft and medium, medium is applied to tractive force, described constant pressure structure comprises compression roller and the driving mechanism being connected with this compression roller, and described compression roller and roll shaft be arranged in parallel; Described driving mechanism comprises movable frame piece, block, transmission mechanism and drive motors, in described movable frame piece, be provided with the push pedal with spring, compression roller two ends are located at respectively in movable frame piece and are pushed by push pedal, described drive motors drives movable frame piece parallel to stop location by transmission mechanism, and now compression roller near roll shaft.
As preferably, described drive motors is torque motor.
As preferably, described transmission mechanism is rack gear, synchronous belt drive mechanism, rocking-arm driving mechanism or engaged gears transmission mechanism.
As preferably, described roll shaft and compression roller are colloid roll shaft or steel rider.
Beneficial effect: compared with prior art, the utlity model has following advantage: can guarantee that by the utility model the frictional traction between traction rollers and print media is constant, thereby stably print media is exported, avoid print media skew, skidded and fold phenomenon, improved print quality.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model institute roll shaft constant pressure structure;
Fig. 2 is to the structural representation in scroll printer by roll shaft constant pressure structure applications of the present utility model.
Wherein, compression roller 1, roll shaft 2, torque motor 3, rack gear 4, movable frame piece 5, push pedal 6; Print media 7, colour band 8.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the utility model, should understand these embodiment and only be not used in restriction scope of the present utility model for the utility model is described, after having read the utility model, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present utility model.
Roll shaft constant pressure structure described in the utility model is to be used in thermal printer, is located at the tail end of print media output.Printer as shown in Figure 2: this printer comprises frame, and be parallel to each other to be arranged on and put medium roll shaft, printing mechanism and colour band conveying mechanism in this frame, wherein printing mechanism comprises three cover print components, corresponding colour band conveying mechanism also comprises three cover colour band assemblies, thereby form CMY tri-look structures, realize random color and print by blue or green, pinkish red, Huang Sanse.It should be noted that in reality, there be print components and the colour band assembly of more covers, more color is provided, for example, can also increase black print components and black bars assembly.In printing mechanism, each print components is parallel to each other and is upper-lower position and is located in frame, be preferably be in the present embodiment horizontally disposed with and each print components on same vertical plane, in reality, also can tilt or vertically place; Colour band assembly coupling corresponding with print components in colour band conveying mechanism.Every cover print components includes rubber roll, rotating shaft and is arranged on printhead in rotating shaft, and rotating shaft is connected with torque motor and printhead driven rotary can be pressed on rubber roll; Colour band assembly corresponding to while comprises to be put colour band roll shaft and receives colour band roll shaft, and ribbon spool is placed in to put on colour band roll shaft and broadcasts, and carries out rolling at receipts colour band roll shaft; Print media and colour band together move in ground floor print components between printhead and rubber roll, and printhead is after to colour band, heating prints, and print media enters the printing mechanism of lower one deck, and colour band after transfer printing reclaims to be wrapped in and receives on colour band roll shaft.In said process, the rubber roll coupling torque motor in undermost print components as driving shaft by and print media between frictional force print media is drawn to pull-out stably.
As shown in Figure 1, the utility model is located at rubber roll (the being roll shaft) side of orlop print components, comprise the compression roller and the driving mechanism that be arranged in parallel with roll shaft, driving mechanism comprises torque motor, rack gear, movable frame piece and block, movable frame piece is that square frame-shaped inside is provided with the push pedal with spring, compression roller two ends are located in movable frame piece and by push pedal and are pushed, torque motor drives movable frame piece parallel to stop location by rack gear, now compression roller and rubber roll (being roll shaft) push, because fixedly making the spring being connected with push pedal, the stroke of movable frame piece there is constant deformation quantity, and then the extruding force between compression roller and rubber roll (being roll shaft) is fixed, frictional traction between the two will constantly have been guaranteed the steady output of print media.
Because the rubber roll of orlop print components must adopt stepper motor or servomotor, adjustable stabilized speed is provided, now just need to make to keep between rubber roll and print media constant frictional force by compression roller.Owing to preferably adopting torque motor to be as the benefit of drive motors in the utility model, it still can keep normal work and motor can not occur burns out fault in the time compression roller being rotated move on to rubber roll.But because torque motor is subject to the impact of environment temperature and input voltage larger, easily there is power output fuctuation within a narrow range, now still can keep constant pressure by this device.
As preferably, the transmission mechanism in the utility model can also be synchronous belt drive mechanism, rocking-arm driving mechanism or engaged gears transmission mechanism.In order to improve frictional force, rubber roll and compression roller all adopt colloid roll shaft.
Claims (4)
1. a roll shaft constant pressure structure, on described roll shaft, be wound around medium, and by the frictional force between roll shaft and medium, medium is applied to tractive force, it is characterized in that: described constant pressure structure comprises compression roller and the driving mechanism being connected with this compression roller, and described compression roller and roll shaft be arranged in parallel; Described driving mechanism comprises movable frame piece, block, transmission mechanism and drive motors, in described movable frame piece, be provided with the push pedal with spring, compression roller two ends are located at respectively in movable frame piece and are pushed by push pedal, described drive motors drives movable frame piece parallel to stop location by transmission mechanism, and now compression roller near roll shaft.
2. roll shaft constant pressure structure according to claim 1, is characterized in that: described drive motors is torque motor.
3. roll shaft constant pressure structure according to claim 2, is characterized in that: described transmission mechanism is rack gear, synchronous belt drive mechanism, rocking-arm driving mechanism or engaged gears transmission mechanism.
4. roll shaft constant pressure structure according to claim 2, is characterized in that: described roll shaft and compression roller are colloid roll shaft or steel rider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320614938.3U CN203666141U (en) | 2013-09-30 | 2013-09-30 | Roller shaft constant pressure structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320614938.3U CN203666141U (en) | 2013-09-30 | 2013-09-30 | Roller shaft constant pressure structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203666141U true CN203666141U (en) | 2014-06-25 |
Family
ID=50962472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320614938.3U Withdrawn - After Issue CN203666141U (en) | 2013-09-30 | 2013-09-30 | Roller shaft constant pressure structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203666141U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103587256A (en) * | 2013-09-30 | 2014-02-19 | 曲阜市玉樵夫科技有限公司 | Constant pressure structure of roller shaft |
-
2013
- 2013-09-30 CN CN201320614938.3U patent/CN203666141U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103587256A (en) * | 2013-09-30 | 2014-02-19 | 曲阜市玉樵夫科技有限公司 | Constant pressure structure of roller shaft |
| CN103587256B (en) * | 2013-09-30 | 2015-09-16 | 曲阜市玉樵夫科技有限公司 | A kind of Constant pressure structure of roller shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140625 Effective date of abandoning: 20150916 |
|
| RGAV | Abandon patent right to avoid regrant |