Anti-reverse loading device for plate material

Abstract

The utility model relates to the detection field of board material, especially a kind of board material anti-reverse loading device.The device is equipped with the conveying module for carrying and conveying board material, conveying module top is equipped with visual detection module, visual detection module is downward to the board material carried and conveyed on conveying module and carries out image acquisition, it is equipped with light source and carries out illumination to board material surface, the light source is lower than the carrying surface of conveying module to board material, and it is upwardly illuminated.Conveying module carries and conveys board material, light source is located below board material, its emitted light is upwardly illuminated on the bottom surface of board material, part light is upwardly emitted from the edge of board material, then when camera is downward to the board material and carries out image acquisition, the edge of board material will have obvious bright-dark contrast, outline is clear, and detection result is reliable.As light emitted by light source is upwardly illuminated on the bottom surface of board material, board material surface reflects light downward, that is, light will not be upwardly reflected to camera and cause highlight interference.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal testing, and in particular to a sheet metal anti-reverse feeding device. Background Technology

[0002] The edge banding machine affixes edge banding strips to the circumference of the board to seal it, giving the board a better appearance and durability. The circumference of the board includes two long edges along the length direction and two short edges along the width direction. The specifications of the edge banding strip vary depending on the length of the edge. Therefore, during the board feeding process (i.e., the board is fed to the edge banding machine from the transmission rollers on the production line), it is necessary to determine whether the length and width directions of the board are reversed. Existing board production lines have a detection area near the edge banding machine. Sensors, barcode readers, and cameras are located above the entrance of the detection area, and a controller is also installed in the detection area to connect the sensors, barcode readers, and cameras. When the sensor detects that the board is conveyed into the detection area by the transmission rollers, the controller controls the barcode reader to read the information barcode affixed to the board to obtain the standard size information of the board, and controls the camera to capture an image of the board entering the detection area. The controller processes and analyzes the board image captured by the camera to obtain the actual size information of the board, and compares it with the standard size information recorded in the information barcode to determine whether the board is reversed (with a difference of 90 degrees). To improve the imaging quality of the board material images, a light source is placed above the detection area and shines downwards onto the board surface. The board surface reflects the light upwards back to the camera, causing highlight interference. This results in the board material images captured by the downward-facing camera having blurred outlines, affecting the reliability of the detection. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a plate anti-reverse feeding device, in which the plate image captured by the camera has a clear outline and the detection result is reliable.

[0004] To solve the above problems, this utility model provides a sheet material anti-reverse feeding device, which is equipped with a conveying module for carrying and conveying the sheet material. A vision detection module is provided above the conveying module. The vision detection module faces downward to collect images of the sheet material carried and conveyed on the conveying module. A light source is provided to illuminate the surface of the sheet material. The light source is lower than the surface of the sheet material carried by the conveying module and illuminates upward. Furthermore, the conveying module specifically comprises multiple drive rollers, with the light source located between two adjacent drive rollers.

[0005] Furthermore, the light source is at least 2 mm lower than the supporting surface.

[0006] Furthermore, a controller is provided to connect the vision inspection module and the light source.

[0007] Furthermore, a barcode reader is installed above the conveying module to read the information barcode on the top surface of the board to obtain the standard size information of the board, and the controller is connected to the barcode reader.

[0008] Furthermore, a through-beam sensor for detecting the position of the plate is installed on the side of the conveying module, and the controller is connected to the through-beam sensor.

[0009] Furthermore, the visual detection module is specifically a camera.

[0010] Beneficial effects: When the conveyor module carries and transports the sheet material, the light source is located below the sheet material, emitting light that shines upwards onto the bottom surface of the sheet. Some light escapes upwards from the edges of the sheet. Therefore, when the camera captures images of the sheet material from below, there will be a clear contrast between light and dark areas along the edges, resulting in a clear outline and reliable detection results. Because the light emitted by the light source shines upwards onto the bottom surface of the sheet, the sheet surface reflects the light downwards, preventing upward reflection of light onto the camera and avoiding highlight interference. Attached Figure Description

[0011] Figure 1 This is a simplified structural diagram of a sheet metal anti-reverse feeding device.

[0012] Figure 2 This is a simplified front view of the anti-reverse feeding device for sheet metal.

[0013] Figure 3 yes Figure 2 A simplified enlarged diagram of point A in the middle.

[0014] Symbol explanation: 1-Drive roller; 2-Light source; 3-Through-beam sensor; 4-Code reader; 5-Camera; 6-Frame; 7-First support frame; 8-Second support frame; 9-Detection area; 11-Drive roller bearing surface; 13-Reference roller; 31-Through-beam sensor transmitter; 32-Through-beam sensor receiver; 130-Drive roller adjacent to the front side of the reference roller. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to specific embodiments.

[0016] Sheet metal anti-reverse feeding device, such as Figure 1As shown, located behind the edge banding machine (not shown in the attached diagram), multiple drive rollers 1 are arranged laterally at intervals on the frame 6. These drive rollers 1 form a conveying module that carries the sheet material forward to the edge banding machine for edge banding. One of the drive rollers 1 is a reference roller 13, with the area in front of it being the detection area 9. A through-beam sensor 3 is installed on the frame 6, with its transmitter 31 located to the left of the reference roller 13 and its receiver 32 located to the right of the reference roller 13. The transmitter 31 continuously emits signals to the receiver 32. A first support frame 7 is located on the left side of the frame 6, with a camera 5 mounted on its top above the drive roller 1, facing downwards towards the detection area 9 in front of the reference roller 13. A second support frame 8 is located behind the reference roller 13, with its top above the drive roller 1, and a barcode reader 4 is installed thereon. The sheet material anti-reverse feeding device has a controller (not shown in the attached diagram) connected to the through-beam sensor 3, the barcode reader 4, and the camera 5.

[0017] The sheet material is carried forward by the transmission roller 1 of the conveying module to the edge banding machine for edge banding. The correct placement angle is such that the front and rear edges are the shorter edges, and the left and right edges are the longer edges. During the forward transport of the sheet material to the edge banding machine by the transmission roller 1, the front edge passes between the transmitter 31 and the receiver 32 and enters the detection area 9, blocking the signal emitted by the transmitter 31. The receiver 32, unable to receive the signal from the transmitter 31, sends a start signal to the controller. The controller then controls the barcode reader 4 to read the information barcode affixed to the top surface of the sheet material to obtain the standard size information of the sheet material (including the dimensions of the shorter and longer edges). It also controls the camera 5, acting as a visual inspection module, to capture images of the front edge of the sheet material. The controller processes and analyzes the images of the front edge of the sheet material captured by the camera 5 to obtain the actual size information of the front edge of the sheet material. This is compared with the standard size information recorded in the information barcode to determine whether the front edge of the sheet material is the shorter edge, thus determining whether the placement angle of the sheet material is correct. The controller is connected to an alarm (not shown in the attached diagram). If the alarm is triggered when the board is found to be placed upside down, the alarm will sound.

[0018] A horizontally positioned, elongated light source 2 is provided between the reference roller 13 and the adjacent drive roller 130 on its front side. (See...) Figure 2 and Figure 3The light source 2 is at least 2mm lower than the bearing surface 11 of the board material by the transmission roller 1, so it will not obstruct the forward movement of the board material. The controller is connected to the light source 2 and controls the light source 2 to light up when the receiver 32 sends a start signal. The light emitted by the light source 2 shines upwards onto the bottom surface of the front edge of the board material. The light from the front side of the light source emanates obliquely upwards from the front side of the front edge of the board material, while the light from the left and right sides of the front edge of the board material shines upwards to the left and right. Therefore, the outer area of ​​the front edge of the board material is brighter. When the camera 5 is pointing downwards to capture images of the front edge of the board material, there will be obvious contrast between light and dark along the edge of the front edge of the board material, the outline is clear, and the detection results are reliable. Since the light emitted by the light source 2 shines upwards onto the bottom surface of the board material, the surface of the board material reflects the light downwards, that is, it will not reflect a large amount of light upwards to the camera 5, causing high-light interference.

[0019] The above description is merely an embodiment of the present invention and does not limit the scope of patent protection. Any non-substantial changes or substitutions made by those skilled in the art based on the present invention will still fall within the scope of patent protection.

Claims

1. A sheet metal anti-reverse feeding device, comprising a conveying module for carrying and conveying sheet metal, a vision inspection module above the conveying module, the vision inspection module facing downwards to acquire images of the sheet metal carried and conveyed on the conveying module, and a light source to illuminate the surface of the sheet metal, characterized in that: The light source is positioned below the surface of the conveying module that supports the plate, and shines upwards.

2. The anti-reverse feeding device for sheet metal as described in claim 1, characterized in that: The conveying module specifically comprises multiple drive rollers, with the light source located between two adjacent drive rollers.

3. The anti-reverse feeding device for sheet metal as described in claim 1, characterized in that: The light source is at least 2 mm lower than the supporting surface.

4. The anti-reverse feeding device for sheet metal as described in claim 1, characterized in that: It is equipped with a controller that connects to the vision inspection module and the light source.

5. The anti-reverse feeding device for sheet metal as described in claim 4, characterized in that: A barcode reader is installed above the conveying module to read the information barcode on the top surface of the board to obtain the standard size information of the board. The controller is connected to the barcode reader.

6. The anti-reverse feeding device for sheet metal as described in claim 4, characterized in that: A through-beam sensor for detecting the position of the sheet material is installed on the side of the conveying module, and the controller is connected to the through-beam sensor.

7. The anti-reverse feeding device for sheet metal as described in claim 1, characterized in that: The visual detection module is specifically a camera (5).

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