CN201060365Y - Vacuum air pressure monitoring apparatus for printer and print equipped with the apparatus - Google Patents
Vacuum air pressure monitoring apparatus for printer and print equipped with the apparatus Download PDFInfo
- Publication number
- CN201060365Y CN201060365Y CNU2007201203507U CN200720120350U CN201060365Y CN 201060365 Y CN201060365 Y CN 201060365Y CN U2007201203507 U CNU2007201203507 U CN U2007201203507U CN 200720120350 U CN200720120350 U CN 200720120350U CN 201060365 Y CN201060365 Y CN 201060365Y
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- rubber
- circuit
- printer
- vacuum
- sensor
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Abstract
The utility model relates to a vacuum pressure monitoring device used for a plate copying apparatus in the printing industry. The device comprises at least one barometric sensor arranged at the bottom of a rubber sheet of the plate copying apparatus, a signal receiving circuit, a signal treating circuit and an output controlling circuit; wherein, the sensor is communicated with a sealed cavity between a glass covering plate of the plate copying apparatus and the rubber sheet through a gas-guide hole positioned on the rubber sheet; the sensor is connected to the signal receiving circuit through a signal wire; the signal treating circuit is connected with the signal receiving circuit and the output controlling circuit; a display screen and an input keyboard are connected with the signal treating circuit; and the output controlling circuit is connected with a vacuum pump power switch and an on-off controlling electromagnetic valve for the air channel of a vacuum pump. Under the help of the utility model, the vacuum pressure of the sealed cavity can be detected precisely, thereby the working condition of the vacuum pump can be controlled automatically during plate copying to prevent the crack of the glass covering plate because of excess vacuum and to prevent exposure failure because of inadequate vacuum, and the service life of the vacuum pump can be prolonged too.
Description
Technical field
The utility model relates to the printing industry printer, more particularly, relates to a kind of printer with the vacuum pressure supervising device and have the printer of this vacuum checking device.
Background technology
The frame part of bleeding of printer generally includes iron plate support, rubber rubber and glass cover-plate, and rubber rubber is placed on the iron plate support, and glass cover-plate then is placed on the rubber rubber.Be lined with the rubber frame of resilient seal between glass cover-plate and the rubber rubber, make glass cover-plate, rubber rubber and rubber frame surround a flat seal chamber.In the printing down process, in order to reach the exposure requirement, will keep certain vacuum tightness in the cavity, thereby the rubber Rubber washer is provided with the vacuum suction hole, and can utilizes vacuum pump the air in the cavity to be found time by the vacuum suction hole.
Yet traditional printer is not with vacuum checking device usually, and operating personnel are generally by estimating the vacuum tightness of estimating by rule of thumb in the cavity.Part printer band vacuum checking device is also arranged, but it uses traditional mechanical rain glass detected air pressure, just mechanical indicator shows, error is big.And owing to do not add the vacuum pump control device, can't utilize measured barometric information that control corresponding is made in the work of vacuum pump, may cause that vacuum suction excessively causes the glass cover-plate explosion.Perhaps vacuum tightness is too low, and residual air is too much between glass cover-plate and the rubber rubber, causes ill-exposed.In addition, owing to the actual pressure data that can not obtain between glass cover-plate and the rubber rubber, thereby make vacuum pump in running order always when printing down is worked, thereby shortened the serviceable life of vacuum pump greatly.
The utility model content
The technical problems to be solved in the utility model is, at the above-mentioned defective that can't accurately detect the actual pressure data in the cavity between glass cover-plate and the rubber rubber, can not control the vacuum pump duty of prior art, the printer vacuum pressure pick-up unit that a kind of high Precision Detection is provided and has automatic control function according to the practical vacuum degree in the cavity.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of printer vacuum pressure supervising device is provided, comprise at least one baroceptor that is arranged on printer rubber rubber bottom, and signal receiving circuit, signal processing circuit and controlling output circuit; Wherein, described sensor is connected with seal chamber between printer glass cover-plate and the rubber rubber by the gas port on the rubber rubber; Described sensor is connected to signal receiving circuit by signal wire; Described signal processing circuit links to each other with signal receiving circuit and controlling output circuit; Described signal processing circuit also is connected with display screen, input keyboard, and described controlling output circuit and vacuum-pump power supply switch and the vacuum pump gas path on-off control electromagnetic valve of bleeding links to each other.
Use in the vacuum pressure supervising device at printer of the present utility model, described signal receiving circuit comprises analog signal input circuit and coupled A/D convertor circuit.
Printer of the present utility model with the vacuum pressure supervising device in, described sensor has five, is separately positioned near the center and four angles of rubber rubber bottom.
Use in the vacuum pressure supervising device at printer of the present utility model, described display screen is a LCD display, and it comprises the gas pressure distribution display field that shows described five air pressure that sensor is surveyed.
Use in the vacuum pressure supervising device at printer of the present utility model, described input keyboard comprises that the time of bleeding, vacuum pressure threshold value, exposure index and/or current time parameter are provided with key, and described sensor is the high-precision gas pressure sensor of per mille.
Another technical scheme that its technical matters that solves the utility model adopts is: a kind of printer is provided, comprises the seal chamber that is surrounded by glass cover-plate, rubber rubber and rubber frame; Rubber rubber is provided with the vacuum suction hole, and it links to each other with the vacuum pump air entry by gas circuit; Be provided with solenoid valve in the gas circuit; It is characterized in that, also comprise at least one baroceptor that is arranged on printer rubber rubber bottom, and signal receiving circuit, signal processing circuit and controlling output circuit; Wherein, described sensor is connected with seal chamber between printer glass cover-plate and the rubber rubber by the gas port on the rubber rubber; Described sensor is connected to signal receiving circuit by signal wire; Described signal processing circuit links to each other with signal receiving circuit and controlling output circuit; Described signal processing circuit also is connected with display screen, input keyboard, and described controlling output circuit and vacuum-pump power supply switch and the vacuum pump gas path on-off control electromagnetic valve of bleeding links to each other.
In printer of the present utility model, described signal receiving circuit comprises analog signal input circuit and coupled A/D convertor circuit.
In printer of the present utility model, described sensor has five, is separately positioned near the center and four angles of rubber rubber bottom.
In printer of the present utility model, described display screen is a LCD display, and it comprises the gas pressure distribution display field that shows described five air pressure that sensor is surveyed.
In printer of the present utility model, described input keyboard comprises that the time of bleeding, vacuum pressure threshold value, exposure index and/or time parameter are provided with key.
Implement vacuum pressure supervising device of the present utility model, has following beneficial effect: can record printer vacuum pressure data in the cavity between rubber rubber and the glass cover-plate when vacuumizing exactly, in the printing down process, control the duty of vacuum pump automatically, prevent because of vacuumizing the explosion of excessive initiation glass cover-plate, or cause ill-exposed inadequately because of vacuum tightness; Guarantee the exposure quality; And, it is worked as required, thereby can prolong the serviceable life of vacuum pump owing to can control the duty of vacuum pump.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the synoptic diagram that distributes according to check point and suction hole in the printer vacuum pressure supervising device of the utility model embodiment;
Fig. 2 is the side view of Fig. 1, wherein shows the mounting means of structural relation and baroceptor between printer glass cover-plate, rubber frame, the rubber rubber;
Fig. 3 is the circuit block diagram according to the printer vacuum pressure supervising device control section of the utility model embodiment;
Fig. 4 is the synoptic diagram according to the printer vacuum pressure supervising device display screen displayed content of the utility model embodiment.
Embodiment
Figure 1 and Figure 2 is the synoptic diagram according to the distribution of check point and suction hole, sensor installation site in the printer vacuum pressure supervising device of the utility model one embodiment.As shown in Figure 2, the rubber rubber 30 of printer is placed on the iron plate support 40.Rubber frame 20 is installed on the rubber rubber 30, and glass cover-plate 10 (transparent) covers on rubber frame 20.So, support seal chamber 50 of formation by caulking gum frame 20 between glass cover-plate 10 and the rubber rubber 30.Rubber rubber 30 is provided with vacuum suction hole 38, and it links to each other with the vacuum pump air entry by gas circuit, also is provided with the solenoid valve (not shown) in the gas circuit, can be communicated with or disconnect the gas circuit between vacuum pump and the cavity as required.When printing down is worked, sensitization sheet material 55 is placed in the cavity, cover glass cover-plate 10, and use the vacuum pump (not shown) to vacuumize by 38 pairs of cavitys of suction hole.As shown in Figure 1, in the present embodiment, in the rubber frame 20, respectively be provided with a suction hole 38 in four corner portions of printer rubber rubber 30.Be provided with 5 gas ports 32 altogether in position and centre, be used to install baroceptor 35 near four corners.Referring to Fig. 2, baroceptor 35 is installed again at printer rubber rubber bottom.The probe of sensor 35 is communicated with cavity 50 by gas port 32, thereby may detect the air pressure in the cavity of rubber upper strata.In the present embodiment, adopt the gas port of ￠ 2, and baroceptor and rubber rubber bottom are carried out encapsulation process, make rubber rubber two-layer positive confinement up and down when vacuumizing.Certainly, the diameter of gas port is not necessarily non-to be ￠ 2, also can adopt other size, as long as can install baroceptor and keep sealing.
Present embodiment has provided and has adopted 5 baroceptors that the embodiment that air pressure detects is carried out near four corners of cavity and centre.But know as is known to the person skilled in the art, also can only come the air pressure in the test chamber with a sensor (installation site is near the centre usually).Two, three, four or more a plurality of sensor also can be installed.
Fig. 3 is the circuit block diagram according to the printer vacuum pressure supervising device control section of the utility model embodiment.As shown in Figure 3, control section comprises signal receiving circuit, signal processing circuit MCU and controlling output circuit, and wherein signal receiving circuit comprises analog signal input circuit and A/D convertor circuit.MCU is connected with LCD display and input keyboard.Controlling output circuit then links to each other with vacuum-pump power supply switch and the vacuum pump gas path on-off control electromagnetic valve of bleeding.
The principle of work of printer vacuum pressure supervising device of the present utility model is: when vacuum pump is outwards drawn air by suction hole 38, negative pressure state will slowly appear in the seal chamber 50 between glass cover-plate 10 and the rubber rubber 30.Baroceptor 35 is sensed the middle air pressure change situation of cavity by gas port 32.Gas pressure sensor is sent to analog signal input circuit with induced signal by signal wire, and simulating signal is delivered to MCU by A/D convertor circuit.Subsequently, MCU is sent to the LCD display demonstration by calculation process such as signal analysis, digital filterings with gas pressure data again.MCU through after the calculation process, makes corresponding output control by controlling output circuit with simulating signal, switching signal again.By keyboard input relevant parameters can be set, as one or more in the parameters such as the time of bleeding, vacuum pressure threshold value, exposure index and current time.
According to the block scheme of the utility model printer vacuum pressure supervising device control circuit, adopt various particular hardwares, software or software and hardware combining to realize that the function of each several part it will be apparent to those skilled in the art that, thereby repeat no more herein.
Fig. 4 is the synoptic diagram according to the printer vacuum pressure supervising device display screen displayed content of the utility model embodiment.As shown in Figure 4, LCD display has the pressure distribution that shows on the viewing area in the seal chamber.
True barometric information testing agency when the utility model provides printer and vacuumizes between rubber rubber and the glass cover-plate cooperates digital processing system to reach the purpose that better control printer vacuumizes effect.The advantage of the utility model printer vacuum pressure pick-up unit is as follows:
1. adopt 5 surfaces to detect, thereby can accurately know printer vacuum pressure data between rubber rubber and the glass cover-plate when vacuumizing.
2. adopt millesimal high-precision gas pressure transducer and LCD numeral to show, thereby avoided the big problem of mechanical rain glass error.
3. owing to adopted the high-precision gas pressure transducer, thereby can draw current real barometric information accurately, simulated data is become digital signal be sent to MCU through amplification, A/D conversion, thereby the calculation process through MCU is made correct control, to stop automatically finding time when reaching the certain vacuum barometric information when vacuumizing, thereby avoid the generation that excessively causes problems such as glass cover-plate explosion owing to vacuumizing; In addition, the air of taking seriously is pressed when not enough, can continue automatically to vacuumize to reach certain vacuum air pressure numerical value, thereby guarantee the exposure quality.
4. owing to adopted high-precision gas pressure transducer and 5 surfaces to detect, MCU just can obtain current vacuum pressure data accurately.When meeting the requirements of the vacuum pressure data when finding time, MCU can control electromagnetic valve pin current vacuum pressure state automatically, stops vacuum pump work automatically, thereby prolongs the serviceable life of vacuum pump.
Claims (10)
1. a printer vacuum pressure supervising device is characterized in that, comprises at least one baroceptor (35) that is arranged on printer rubber rubber bottom, and signal receiving circuit, signal processing circuit and controlling output circuit; Wherein, described sensor (35) is connected with seal chamber (50) between printer glass cover-plate (10) and the rubber rubber (30) by the gas port (32) on the rubber rubber (30); Described sensor (35) is connected to signal receiving circuit by signal wire; Described signal processing circuit links to each other with signal receiving circuit and controlling output circuit; Described signal processing circuit also is connected with display screen, input keyboard, and described controlling output circuit and vacuum-pump power supply switch and the vacuum pump gas path on-off control electromagnetic valve of bleeding links to each other.
2. printer vacuum pressure supervising device according to claim 1 is characterized in that described signal receiving circuit comprises analog signal input circuit and coupled A/D convertor circuit.
3. printer vacuum pressure supervising device according to claim 1 is characterized in that described sensor has five, is separately positioned near the center and four angles of rubber rubber bottom.
4. printer vacuum pressure supervising device according to claim 3 is characterized in that described display screen is a LCD display, and it comprises the gas pressure distribution display field that shows described five air pressure that sensor is surveyed.
5. printer vacuum pressure supervising device according to claim 1, it is characterized in that, described input keyboard comprises that the time of bleeding, vacuum pressure threshold value, exposure index and/or current time parameter are provided with key, and described sensor is the high-precision gas pressure sensor of per mille.
6. a printer comprises the seal chamber that is surrounded by glass cover-plate, rubber rubber and rubber frame; Rubber rubber is provided with the vacuum suction hole, and it links to each other with the vacuum pump air entry by gas circuit; Be provided with solenoid valve in the gas circuit; It is characterized in that, also comprise at least one baroceptor that is arranged on printer rubber rubber bottom, and signal receiving circuit, signal processing circuit and controlling output circuit; Wherein, described sensor is connected with seal chamber between printer glass cover-plate and the rubber rubber by the gas port on the rubber rubber; Described sensor is connected to signal receiving circuit by signal wire; Described signal processing circuit links to each other with signal receiving circuit and controlling output circuit; Described signal processing circuit also is connected with display screen, input keyboard, and described controlling output circuit and vacuum-pump power supply switch and the vacuum pump gas path on-off control electromagnetic valve of bleeding links to each other.
7. printer according to claim 6 is characterized in that, described signal receiving circuit comprises analog signal input circuit and coupled A/D convertor circuit.
8. printer according to claim 6 is characterized in that described sensor has five, is separately positioned near the center and four angles of rubber rubber bottom.
9. printer according to claim 8 is characterized in that, described display screen is a LCD display, and it comprises the gas pressure distribution display field that shows described five air pressure that sensor is surveyed.
10. printer according to claim 6 is characterized in that, described input keyboard comprises that the time of bleeding, vacuum pressure threshold value, exposure index and/or time parameter are provided with key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201203507U CN201060365Y (en) | 2007-05-25 | 2007-05-25 | Vacuum air pressure monitoring apparatus for printer and print equipped with the apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201203507U CN201060365Y (en) | 2007-05-25 | 2007-05-25 | Vacuum air pressure monitoring apparatus for printer and print equipped with the apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201060365Y true CN201060365Y (en) | 2008-05-14 |
Family
ID=39408847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201203507U Expired - Fee Related CN201060365Y (en) | 2007-05-25 | 2007-05-25 | Vacuum air pressure monitoring apparatus for printer and print equipped with the apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201060365Y (en) |
-
2007
- 2007-05-25 CN CNU2007201203507U patent/CN201060365Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 Termination date: 20110525 |