Screw sorting machine and its indexing plate

Abstract

A screw sorting machine and its indexing plate are disclosed. The indexing plate includes a central connecting portion and a support ring coaxially connected to the outer periphery of the central connecting portion. The outer periphery of the support ring is recessed with a plurality of slots spaced apart around its axis and extending vertically. Each slot allows the screw shank to be inserted laterally and downwards. The indexing plate has a low-reflectivity surface, formed by laser engraving and a black roughening process, which serves as a guide and limit for the screw head of the screw inserted in the slot to swing downwards. Through the structural design of the black roughened low-reflectivity surface on the indexing plate and the black roughened low-reflectivity top surface on the stop, the screw sorting machine of this invention can reliably obtain clear and complete undamaged images of the screw head outline.

Claims

1. A screw sorting machine suitable for inspecting screws, the screw having a screw shaft and a screw head, the screw sorting machine comprising: a conveying device including a rotatable indexing plate for carrying the screws, a stop adjacent to the outer periphery of the indexing plate, and a drive for rotating the indexing plate; the indexing plate having a plurality of recessed slots spaced apart around its axis and extending vertically, each slot allowing the screw shaft of a screw to be laterally disengaged and inserted downwards; the indexing plate having a low-reflectivity surface formed by laser engraving and black roughening, for the screw head of the screw inserted in each slot to be tilted downwards and limited; the stop blocking the displacement of one slot. The radial opening side is used to limit the screw head conveyed by the slot to the low reflectivity surface, and the stop has a laser-engraved black roughened surface adjacent to the low reflectivity surface; and an image capturing device is disposed directly above the rotational displacement path of the slots of the indexing plate, and can be used to capture the contour image of the screw head conveyed by the slot blocked by the stop downward. The image capturing device includes an image capturing module for capturing the contour image and an illumination module for illuminating the screw head whose contour image is captured downward.

2. The screw sorting machine as described in claim 1, wherein, The average roughness of the low-reflectivity top surface is >6 μm.

3. The screw sorting machine as described in claim 1 or 2, wherein, The average light reflectance of the low-reflectivity top surface is 5% to 10%.

4. A sorting plate for a screw sorting machine, suitable for mounting and connecting to a drive unit, and for carrying screws to be inspected, the screw having a screw rod and a screw head, the sorting plate comprising: a central connecting part for mounting and connecting to the drive unit and being driven by the drive unit to rotate about its own axis; and a bearing ring part coaxially connected to the outer periphery of the central connecting part, the outer periphery of which is recessed with a plurality of slots spaced apart around its axis and extending vertically, each slot being used for the screw rod of a screw to be laterally disengaged and inserted downwards, and the sorting plate having a low reflectivity cross-section made by laser engraving with a black roughened finish, for the screw head of the screw inserted in each slot to be tilted downwards and limited.

5. The indexing plate of the screw sorting machine as described in claim 4, wherein, The average roughness of this low-reflectivity cross-section is >6 μm.

6. The indexing plate of the screw sorting machine as described in claim 4 or 5, wherein, The average light reflectance of this low-reflectivity cross-section is 5% to 10%.

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