Position on-line measuring device for printing machine

Abstract

The utility model discloses a position on-line measuring device for a printing machine, which comprises a rack, a printing conduction band, a displacement sensor and a controller, the printing conduction band is horizontally arranged on the rack, a mounting plate penetrating through the inner side of the printing conduction band is transversely arranged in the rack, kidney-shaped holes are formed in the printing conduction band at intervals front and back, and the displacement sensor is arranged in the kidney-shaped holes. The mounting plate is provided with a plurality of rows of kidney-shaped holes, the rows of kidney-shaped holes are distributed at intervals in the width direction of the printing guide belt, the displacement sensors are vertically arranged on the mounting plate and correspond to the kidney-shaped holes in each row in a one-to-one mode, and the displacement sensors are connected with the controller to send signals. According to the position on-line measuring device for the printing machine, the interval part of the kidney-shaped holes in the printing conduction band is triggered when passing through the position above the displacement sensor, the controller obtains the progress of the printing conduction band and the position of the printing conduction band in a system through trigger signals, the control precision of the printing conduction band is improved, and the printing conduction band is more accurate. And the displacement sensor is used for monitoring the position of the printing stock on the printing guide belt.

Description

Technical Field

[0001] The utility model relates to the technical field of printing machines, in particular to an online position measuring device for a printing machine. Background Art

[0002] In a printing machine, a printing guide is needed to carry the substrate, a servo motor is used to drive the printing guide, and the position of the printing guide is measured by monitoring the servo motor through sensors to avoid large errors.

[0003] In fact, the printing guide belt will still produce deviations during operation. In order to reduce the printing misalignment problem caused by the deviation, the utility model patent with application number 201120097729.7 discloses a device for adjusting the accumulated error of the printing guide belt of a flat screen printing machine. The device uses a digital camera to capture images, which are sent to an image processing device for comparison with a pre-set standard pattern to analyze the cause of the deviation. The analysis result is then sent to a control device, which issues instructions to the servo control system to compensate for the operation of the printing guide belt. However, the structure is relatively complex and the cost is high, and needs to be improved. Utility Model Content

[0004] The utility model aims to provide an online position measuring device for a printing machine, which can measure the positions of a printing guide belt and a printing substrate and improve the printing quality.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] An online position measuring device for a printing machine comprises: a frame, a printing guide, a displacement sensor and a controller, wherein the printing guide is horizontally arranged on the frame, a mounting plate penetrating the inner side of the printing guide is transversely arranged in the frame, waist holes are arranged at intervals in front and back on the printing guide, and several rows of waist holes are distributed at intervals along the width direction of the printing guide, the displacement sensor is vertically arranged on the mounting plate and corresponds to one waist hole in each row of waist holes, and the displacement sensor is connected to the controller to send signals.

[0007] Wherein, a roller for supporting the running of the printing guide belt is arranged in the frame.

[0008] Wherein, a servo motor for driving one of the rollers to rotate is arranged in the frame.

[0009] Wherein, the controller is connected to the servo motor to perform rotation control.

[0010] Wherein, the printing guide belt adopts a synchronous belt structure.

[0011] The waist holes are arranged in two rows on the edges of both sides of the printing guide.

[0012] The beneficial effects of the utility model include: an online position measuring device for a printing machine, which uses a displacement sensor to monitor the printing guide belt to realize the operation measurement of the printing guide belt, the interval length of the waist holes is fixed, and the interval part of the waist holes on the printing guide belt is triggered when it passes above the displacement sensor. The controller uses the trigger signal to obtain the progress of the printing guide belt and its position in the system, calibrates the operation of the servo motor, improves the control accuracy of the printing guide belt, and uses the displacement sensor to monitor the position of the substrate on the printing guide belt to avoid the problem of tilting of the front end of the substrate, which is beneficial to improving the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 yes Figure 1 Top view of the . DETAILED DESCRIPTION

[0015] Combine the following Figure 1-2 The technical solution of the utility model is further illustrated by specific embodiments.

[0016] like Figure 1 The online position measuring device for a printing machine shown includes: a frame 1, a printing guide belt 3, a displacement sensor 4 and a controller 9. The printing guide belt 3 is horizontally arranged on the frame 1. In this embodiment, a roller 8 supporting the operation of the printing guide belt 3 is arranged in the frame 1. The printing guide belt 3 adopts a synchronous belt structure, and the roller 8 is provided with corresponding teeth and grooves to ensure the driving of the printing guide belt and avoid slipping problems.

[0017] A servo motor 7 is provided in the frame 1 to drive one of the rollers 8 to rotate. The controller 9 is connected to the servo motor 7 to control the rotation. The controller 9 can be a single chip microcomputer fixed on one side of the frame 1, which is easy to operate. The substrate 5 is placed on the printing guide 3, and the substrate 5 is transferred through the printing guide 3.

[0018] like Figure 2 As shown, waist holes 6 are arranged at intervals in the front and back of the printing guide 3, and several rows of waist holes 6 are spaced apart along the width direction of the printing guide 3. In this embodiment, the waist holes 6 are arranged in two rows at the edges on both sides of the printing guide 3, and there are no waist holes in the middle position of the printing guide 3 to ensure flatness and provide stable support for the substrate 5 during printing.

[0019] A mounting plate 2 is horizontally arranged in the frame 1 and passes through the inner side of the printing blanket 3. The displacement sensor 4 is vertically arranged on the mounting plate 2 and corresponds to one of the waist holes 6 in each row of waist holes 6. The displacement sensor 4 is connected to the controller 9 to send signals. The printing blanket is monitored by the displacement sensor 4 to achieve the running measurement of the printing blanket 3.

[0020] Specifically, the interval length of the waist hole 6 is fixed, and the interval part of the waist hole on the printing guide belt 3 is triggered when it passes above the displacement sensor 4. The displacement sensor 4 uses a photoelectric sensor to measure the distance. When the part of the printing guide belt 3 with the waist hole passes the displacement sensor 4, the distance measurement value is infinite, and when the part of the printing guide belt 3 without the waist hole passes the displacement sensor 4, the distance measurement value is the minimum, assuming it is a. After the printing material 5 is placed on the printing guide belt 3, the front end of the substrate 5 covers a part of the waist hole. When the substrate 5 passes the displacement sensor 4, the distance measurement value is b. The value of b is the value of a plus the thickness of the substrate 5 for distinction.

[0021] The controller 9 uses the value a sent by the displacement sensor 4 to obtain the progress of the printing guide 3 and its position in the system, thereby calibrating the operation of the servo motor 7, improving the control accuracy of the printing guide 3, and uses the value b sent by the displacement sensor 4 to monitor the position of the printing material 5 on the printing guide, which is beneficial to improving the printing quality.

[0022] In addition, since there are two displacement sensors 4, when the two displacement sensors 4 simultaneously send a signal with a value b to the controller 9, it indicates that the front end of the substrate 5 is flush with the width direction of the printing guide 3, thereby effectively avoiding the problem of the front end of the substrate 5 tilting and realizing online measurement of the substrate 5.

[0023] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A position online measuring device for a printing machine, characterized in that: include: A frame, a printing guide, a displacement sensor and a controller, wherein the printing guide is horizontally arranged on the frame, a mounting plate penetrating the inner side of the printing guide is horizontally arranged in the frame, waist holes are arranged at intervals in front and back on the printing guide, and several rows of waist holes are spaced apart along the width direction of the printing guide, the displacement sensor is vertically arranged on the mounting plate and corresponds to one waist hole in each row of waist holes, and the displacement sensor is connected to the controller to send signals.

2. The on-line position measuring device for a printing machine according to claim 1, characterized in that: The frame is provided with a roller for supporting the printing guide belt to run.

3. The on-line position measuring device for a printing machine according to claim 2, characterized in that: The frame is provided with a servo motor for driving one of the rollers to rotate.

4. The on-line position measuring device for a printing machine according to claim 3, characterized in that: The controller is connected to the servo motor to perform rotation control.

5. The on-line position measuring device for a printing machine according to claim 1, characterized in that: The printing guide belt adopts a synchronous belt structure.

6. The on-line position measuring device for a printing machine according to claim 1, characterized in that: The waist holes are arranged in two rows at the edges of both sides of the printing blanket.

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