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Surface inspection device for cylindrical body

A technology for surface inspection devices and cylinders, which is applied to measuring devices, instruments, scientific instruments, etc., can solve the problems of decreased inspection accuracy and inability to correctly distinguish undefective strip-shaped recesses Da, etc., so as to improve inspection accuracy and reduce Dimensions, effects of high inspection accuracy

Inactive Publication Date: 2013-12-25
RESONAC HOLDINGS CORPORATION
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Problems solved by technology

In this way, the recesses D are detected by the difference in the light intensity of the specularly reflected light Lr. Therefore, although the depths and / or shapes of the recesses D are slightly different, all the recesses D are detected, and the non-defective stripe-shaped recess Da and the defective stripe cannot be accurately distinguished. shaped concave portion Db, there is a problem that inspection accuracy decreases

Method used

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  • Surface inspection device for cylindrical body
  • Surface inspection device for cylindrical body
  • Surface inspection device for cylindrical body

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Embodiment Construction

[0057] figure 1 , 2 It is a figure which shows the surface inspection apparatus of the cylindrical body which is embodiment of this invention. As shown in both figures, this surface inspection device can inspect the surface of a cylindrical body W as an inspection object (work).

[0058] The cylindrical body W is used for photosensitive drums, transfer rollers, developing rollers, and other components in, for example, copiers, printers, facsimile machines, and multifunction machines constituting an electrophotographic system.

[0059] Among the cylindrical body W that can constitute such a member, a cylindrical body W used as a raw material tube and / or a substrate for a photosensitive drum in a copier and / or a printer can be cited as a preferred example in the embodiment. Copiers and / or printers that employ an electronic photo system. In addition, the substrate for a photosensitive drum refers to a tube body before forming a photosensitive layer after cutting and / or drawin...

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Abstract

The present, invention relates to a surface inspection device for a cylindrical body provided with an illumination light source (11) disposed above the cylindrical body (W), a beam splitter (13) disposed above the cylindrical body (W) so as to correspond to the illumination light source (11), and a surface condition recognition means (2) disposed above the beam splitter (13). Illumination light (L) emitted from the illumination light source (11) is reflected by the beam splitter (13) and applied coaxially to the surface of the cylindrical body, and the reflected light (Lr) reflected by the surface of the cylindrical body transmits through the beam splitter (13) to be recognized by the surface condition recognition means (2). The device is configured such that the illumination light (L) from the illumination light source (11) is applied from one end side of the cylindrical body (W) in the axial direction (X) toward, the other end side so as to be in parallel to the axial direction (X). The device can detect only defective steak-like surface irregularities among steak-like surface irregularities.

Description

technical field [0001] The present invention relates to a cylindrical body surface inspection device for inspecting the surface state of a cylindrical body and related technologies. Background technique [0002] Cylindrical bodies such as substrates for photosensitive drums require high surface accuracy, so surface inspection is performed to exclude cylindrical bodies with surface defects such as scratches, unevenness, foreign matter adhesion, and dirt. [0003] For example, the surface inspection device of the cylindrical body disclosed in the following patent document 1 is as Figure 8 As shown, the cylinder W is irradiated with illumination light L from the light source 101 arranged on the upper side with respect to the cylinder W, and on the other hand, the regular reflected light (reflected light image) Lr thereof is photographed by the camera 102. Based on the photographed data , to detect surface defects of the cylinder 1. [0004] However, in recent years, as a subs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/952
CPCG01N21/952
Inventor 若竹克则高桥洋恭
Owner RESONAC HOLDINGS CORPORATION
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