CN114643786A - Automatic measuring device for flatness of printing platform and printer - Google Patents

Abstract

The invention discloses an automatic measuring device for flatness of a printing platform and a printer. This print platform flatness automatic measuring device includes: a printing platform; the sliding block is arranged above the printing platform and is connected to the horizontal guide rail in a sliding manner; the positioning device is used for determining the position of the sliding block in the sliding direction of the sliding block and is arranged on the sliding block; the height measuring device is used for measuring the height of the top surface of the printing platform and is arranged on the sliding block; the control device, the sliding block, the positioning device and the height measuring device are all in communication connection with the control device. The positioning device and the height measuring device can respectively and automatically detect the horizontal position information of the sliding block at the same position and the height information of the sliding block and the printing platform, and then the control device can judge the flatness condition according to the deviation condition of the height information of different positions on the top surface of the printing platform, so that the flatness detection efficiency of the printing platform can be improved.

Description

Printing platform flatness automatic measuring device and printer

technical field

The invention relates to the technical field of printing equipment, in particular to an automatic measuring device for the flatness of a printing platform and a printer.

Background technique

Flat or coil printers must adjust the flatness of the printing platform during the installation process. The better the flatness, the better the printing effect.

Now, in the flatness detection stage, a common method is: fix the dial indicator on the linear guide, select the reference point, measure the measured point by manually moving the dial indicator or dial indicator, and compare the plane of the platform To adjust the flatness of the printing platform.

However, due to the need to manually move the dial indicator and record its position on the linear guide during the measurement process, it is time-consuming and labor-intensive, and the accuracy is poor. In addition, the dial indicator and the printing cart on the printing platform are not connected. , During the measurement process, it is necessary to continuously move the position of the printing trolley to avoid the measurement space.

Therefore, how to improve the flatness detection efficiency is a technical problem that those skilled in the art need to solve at present.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide an automatic measuring device for the flatness of a printing platform, which can efficiently detect the flatness of the printing platform. Another object of the present invention is to provide a printer including the above-mentioned device for automatically measuring the flatness of the printing platform, the flatness of the printing platform can be efficiently detected.

To achieve the above object, the present invention provides the following technical solutions:

An automatic measuring device for flatness of a printing platform, comprising:

printing platform;

a slider set above the printing platform, the slider is slidably connected to the horizontal guide rail;

a positioning device for determining the position of the slider in its sliding direction, the positioning device being arranged on the slider;

an altimetry device for measuring the height of the top surface of the printing platform, the altimetry device being arranged on the slider;

A control device, the sliding block, the positioning device and the height measuring device are all communicatively connected to the control device.

Preferably, the slider is a printing carriage.

Preferably, the positioning device is a grating ruler or a magnetic grating ruler.

Preferably, the height-measuring device comprises a probe driving device, a measuring probe and a probe detecting device electrically connected to the control device respectively; the measuring probe is fixed on the bottom end of the probe driving device; the probe driving device uses In order to drive the measuring probe to move up and down, the measuring probe is used to send a contact signal to the control device after contacting the top surface of the printing platform, and the probe detection device is used to detect the movement distance of the measuring probe .

Preferably, the measurement probe includes a resilient member to send a contact signal to the control device when compressed.

Preferably, the probe driving device is an electromagnet or a linear motor or an air cylinder or a hydraulic cylinder.

Preferably, the probe detection device includes a photoelectric switch fixed on the printing carriage and a sensing sheet matched with the photoelectric switch, and the sensing sheet is fixed on the measuring probe so as to be detected with the movement of the measuring probe. Change the shading of the photoelectric switch.

Preferably, the altimetry device includes a laser rangefinder.

Preferably, the altimetry device includes an infrared rangefinder.

A printer includes the above-mentioned automatic measuring device for the flatness of the printing platform.

The automatic measuring device for the flatness of the printing platform provided by the present invention comprises: a printing platform; a sliding block arranged above the printing platform, the sliding block is slidably connected to a horizontal guide rail; a positioning for determining the position of the sliding block in its sliding direction The device, the positioning device is set on the slider; the height measuring device used to measure the height of the top surface of the printing platform, the height measuring device is set on the slider; the control device, the slider, the positioning device and the height measuring device are all connected in communication. control device.

The positioning device and the height measuring device can automatically detect the horizontal position information of the slider at the same position and the height information of the printing platform, and then the control device can judge the flatness according to the deviation of the height information of different positions on the top surface of the printing platform. , which can improve the flatness detection efficiency of the printing platform.

The printer provided by the present invention including the above-mentioned device for automatically measuring the flatness of the printing platform can efficiently detect the flatness of the printing platform.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

1 is a front view of an automatic measuring device for flatness of a printing platform provided by the present invention;

FIG. 2 is an internal structure diagram of the height measuring device in the automatic measuring device for the flatness of the printing platform provided by the present invention.

Reference number:

Printing platform 1, printing carriage 2, guide rail 3, positioning device 4, height measuring device 5, photoelectric switch seat 51, measuring probe 52, probe detection device 53, induction sheet 54, photoelectric switch 55, electromagnet 56, fixing plate 57.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The core of the present invention is to provide an automatic measuring device for the flatness of the printing platform, which can efficiently detect the flatness of the printing platform. Another core of the present invention is to provide a printer including the above-mentioned device for automatically measuring the flatness of the printing platform, and the flatness of the printing platform can be efficiently detected.

In a specific embodiment of the automatic measuring device for flatness of the printing platform provided by the present invention, please refer to FIG. 1 and FIG. 2 , which includes a printing platform 1 , a slider, a guide rail, a positioning device 4 , a height measuring device 5 and a control device.

The slider is arranged above the printing platform 1, and the slider is slidably connected to the horizontal guide rail 3. The slider slides in the horizontal direction on the guide rail 3. The guide rail 3 provides a reference height for the detection of the flatness of the printing platform. Change. The guide rail 3 is specifically a linear guide rail beam.

The positioning device 4 is arranged on the slider, and is used to determine the position of the slider in its sliding direction, so as to realize the automatic positioning of the slider in the horizontal direction. The height measuring device 5 is arranged on the slider, and is used to measure the height difference of the top surface of the printing platform 1, and specifically measure the height between a point on the slider at a set position with a constant height and different positions on the top surface of the printing platform 1 The difference is taken as the height of different positions on the top surface of the printing platform 1 .

The slider, the positioning device 4 and the altimetry device 5 are all connected to the control device in communication. The control device can pair and store the horizontal position information of the slider and the altimetry results at the same time, which can be judged according to the comparison of the altimetry results at different positions. Flatness.

In this embodiment, the positioning device 4 and the height measuring device 5 can automatically detect the horizontal position information of the slider at the same position and the height information of the printing platform 1, respectively, and the control device can detect the deviation of the height information at different positions on the top surface of the printing platform according to the deviation The flatness condition can be judged according to the situation, and the flatness detection efficiency of the printing platform 1 can be improved.

Further, the slider is the printing trolley 2, that is to say, the height measuring device 5 and the positioning device 4 are directly arranged on the printing trolley 2, then during the flatness detection process, there is no need to repeatedly adjust the position of the printing trolley 2 to make room. The height measurement space, the flatness detection can be carried out by directly moving the printing carriage 2.

Further, the positioning device 4 is a grating ruler, and may also be a magnetic grating ruler in other embodiments, and the accuracy can reach 0.001 mm.

Further, the height measuring device 5 includes a probe driving device, a measuring probe 52 and a probe detecting device 53 which are electrically connected to the control device, respectively. The measuring probe 52 is fixed on the bottom end of the probe driving device. The probe driving device is used to drive the measuring probe 52 to move up and down. The measuring probe 52 is used to send a contact signal to the control device after touching the top surface of the printing platform 1 , and the probe detection device 53 is used to detect the moving distance of the measuring probe 52 . Specifically, the control device may take the height measurement result of the height measurement device 5 according to the distance that the measuring probe 52 moves from the initial height to the position where the contact signal is sent. In addition, after receiving the contact signal, the control device may control the probe driving device to drive the measurement probe 52 to reset. Specifically, the probe driving device is fixed on the slider.

Since the probe detection device 53 sends a contact signal after contacting the printing platform 1, it can be ensured that the measuring probe 52 detects the top surface of the printing platform 1, and the accuracy of flatness detection can be improved.

Further, the measurement probe 52 includes an elastic member to send a contact signal to the control device when compressed. Through the elastic arrangement of the measuring probe 52 , it can be further ensured that the contact signal is sent out after the measuring probe 52 contacts the printing platform 1 .

Further, the probe driving device is an electromagnet 56, which is convenient to control. The electromagnet 56 is energized, and its moving iron core drives the measuring probe 52 to extend downward. At the same time, the moving iron core is connected to the spring. After the power is cut off, the spring drives the moving iron core and the measuring probe 52 to reset. Of course, in other embodiments, the probe driving device may also be a linear motor, an air cylinder, or a hydraulic cylinder.

Further, the probe detection device 53 includes a photoelectric switch 55 fixed on the printing carriage 2 and an induction sheet 54 matched with the photoelectric switch 55. The induction sheet 54 is fixed on the measuring probe 52, so as to change the response to the photoelectric switch with the movement of the measuring probe 52. The occlusion of 55 can accurately measure the value of the height gap between different positions of the top surface of the printing platform 1 and the set height.

As shown in FIG. 2 , the measuring probe 52 and the sensing sheet 54 move down synchronously. During the downward movement, the photoelectric switch 55 is not blocked to the state of blocking the photoelectric switch 55, so that the photoelectric switch is triggered to generate a trigger signal. After contacting the top surface of the printing platform 1, it resets upward and drives the induction sheet 54 to move up. When the induction sheet 54 leaves the photoelectric switch 55, the photoelectric switch 55 generates a closing signal, and the control device generates the trigger signal according to the photoelectric switch 55. The time difference between the signal and the closing signal Combined with the moving speed of the measuring probe 52, or generating a trigger signal according to the photoelectric switch 55 and the time difference between the measuring probe 52 and the top surface of the printing platform 1, combined with the moving speed of the measuring probe 52, the downward movement distance of the measuring probe 52 can be judged, and the determined The value of the height gap above.

Of course, in other embodiments, the height-measuring device 5 can also be directly set as a laser range finder, and the height-measuring is realized by sending laser light to the top surface of the printing platform 1 . Alternatively, the altimetry device 5 may also be an infrared rangefinder.

In the detection device in this embodiment, an altimetry device 5 and a magnetic scale are set on the printing carriage 2, and the operation of the altimeter 5 and the position signal of the magnetic scale can be read and fed back through the software control of the control device. The position data of the trolley 2 is printed, the height gap is obtained by the height measuring device 5, the deviation value is obtained by comparing with the reference point, and the height position of the measuring point is obtained and recorded. Then, the numerical values of the reference point and the deviation point are automatically obtained through the software operation of the control device, each measurement data is read and recorded by the software, and the reference point is automatically selected by the algorithm to judge the deviation value of all the measurement positions, so as to obtain the flatness and the required value. The adjusted point position has high measurement accuracy and accuracy, and good repeatability. It does not need to manually move the printing cart 2, and automatically records and analyzes the measurement results. It is more convenient to adjust the flatness, which can greatly improve the detection accuracy and reduce labor costs. It can be applied to Flatness inspection of print platforms for flatbed or roll-to-roll printers.

In addition to the above-mentioned automatic measuring device for the flatness of the printing platform, the present invention also provides a printer, which may specifically be a digital inkjet printing device. The printer includes an automatic measuring device for flatness of a printing platform, which may be the automatic measuring device for flatness of a printing platform provided in any of the above embodiments, and the beneficial effects can refer to the above embodiments accordingly. For the structure of other parts of the printer, please refer to the prior art, which will not be repeated here.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

The orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on what is shown in the drawings. The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention . Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

The automatic measuring device and printer for the flatness of the printing platform provided by the present invention have been introduced in detail above. The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (10)

1. a printing platform flatness automatic measuring device, is characterized in that, comprises: printing platform (1); a slider arranged above the printing platform (1), the slider is slidably connected to the horizontal guide rail (3); a positioning device (4) for determining the position of the slider in its sliding direction, the positioning device (4) being arranged on the slider; a height measuring device (5) for measuring the height of the top surface of the printing platform (1), the height measuring device (5) being arranged on the slider; A control device, wherein the sliding block, the positioning device (4) and the height measuring device (5) are all connected to the control device in communication. 2 . The automatic measuring device for the flatness of the printing platform according to claim 1 , wherein the slider is a printing carriage. 3 . 3 . The automatic measuring device for the flatness of the printing platform according to claim 2 , wherein the positioning device ( 4 ) is a grating ruler or a magnetic grating ruler. 4 . 4. The automatic measuring device for the flatness of the printing platform according to claim 3, wherein the height measuring device (5) comprises a probe driving device, a measuring probe (52) and a probe electrically connected to the control device respectively. A detection device (53); the measurement probe (52) is fixed on the bottom end of the probe drive device; the probe drive device is used to drive the measurement probe (52) to move up and down, and the measurement probe (52) uses After touching the top surface of the printing platform (1), a contact signal is sent to the control device, and the probe detection device (53) is used to detect the movement distance of the measurement probe (52). 5. The automatic measuring device for the flatness of the printing platform according to claim 4, characterized in that, the measuring probe (52) comprises an elastic part, so as to send a contact signal to the control device when it is compressed. 6 . The automatic measuring device for the flatness of the printing platform according to claim 4 , wherein the probe driving device is an electromagnet ( 56 ) or a linear motor or an air cylinder or a hydraulic cylinder. 7 . 7. The automatic measuring device for the flatness of the printing platform according to claim 4, wherein the probe detection device (53) comprises a photoelectric switch (55) fixed on the printing carriage (2) and a photoelectric switch (55) connected with the photoelectric An induction sheet (54) matched with a switch (55), the induction sheet (54) is fixed on the measurement probe (52), so as to change the response to the photoelectric switch (55) as the measurement probe (52) moves ) occlusion. 8 . The automatic measuring device for the flatness of the printing platform according to claim 1 , wherein the height measuring device ( 5 ) comprises a laser range finder. 9 . 9 . The automatic measuring device for the flatness of the printing platform according to claim 1 , wherein the height measuring device ( 5 ) comprises an infrared range finder. 10 . 10. A printer, characterized in that it comprises the automatic measuring device for the flatness of a printing platform according to any one of claims 1 to 9.

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