JPH0972850A - Rotating-body visual inspection apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spherical-body visual inspection apparatus by which the surface of a spherical body can be inspected optically, with high accuracy, at high speed and easily. SOLUTION: A rotating-body visual inspection apparatus is constituted of a driving roller 5 which is turned to a prescribed direction in a fixed position around a horizontal shaft and in which a recessed part 6, for spherical-body discharge, into which a spherical body 1 is fitted is provided in a part of the outer circumference, of a constant-delivery holding part 10 which is provided with a constant-delivery device 12 used to supply the spherical body 1 one piece by one piece to the surface position od the outer circumference at the driving roller 5 and with a roller device 13 used to hold, in a fixed position, the spherical body 1 supplied by the constant-delivery device 12 so as to be rotatable and of a visual inspection part 20 which optically inspects the existence of a flaw on the surface of the spherical body 1 turned to a prescribed direction in the fixed position. The driving roller 5 is turned continuously, and a series of operations such as the constant delivery, the rotation and the discharge of the spherical body 1 are performed by making use of its rotational force. While the spherical body 1 makes one rotation in the fixed position, respective circumferential parts divided in a round slicing direction perpendicular to its shaft are inspected by a plurality of photoelectric sensors at the visual inspection part 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary body for optically inspecting the surface of a rotating body made of steel, ceramics or the like, such as a sphere or a cylindrical body, for defects such as flaws and the finished state of the surface of the rotating body. The present invention relates to a body appearance inspection device.

[0002]

2. Description of the Related Art Balls such as steel balls of ball bearings are required to be true spheres and have no surface flaws. Therefore, the presence or absence of surface flaws is inspected at the final stage of sphere manufacturing. There is. As a general method for inspecting the presence or absence of flaws on the surface of the sphere, the spot light is sequentially scanned on the entire surface of the sphere, and the reflected light from the sphere surface of the spot light is detected by a light receiving element, and the sphere surface is detected from the received light amount. A method of detecting the presence or absence of a flaw and the size of the flaw is known.

The above inspection method is specifically performed as follows. As shown in FIG. 7, the sphere 1 held at a fixed position by a rotating roller or the like (not shown) is rotated (spinned) in a predetermined direction, and the projection element 2 is projected onto the surface of the sphere 1 from the predetermined direction.
The spot light is projected, and the light reflected from the surface of the sphere is received by the light receiving element 3 installed at a fixed position. Sphere 1 is 36
When the circumference part (one meridian L part in FIG. 7) of a predetermined width (corresponding to the diameter of the spot light) scanned by the spot light on the surface of the sphere rotated by 0 ° is inspected, the rotation axis of the sphere 1 Is rotated at a constant pitch (revolution) around the center of the sphere, and sphere 1
1 rotation (rotation). The rotation and the revolution of the sphere 1 are continuously repeated to sequentially move the meridian portion where the spot light is scanned in FIG. 7, and finally the entire surface of the sphere 1 is scanned with the spot light. The presence or absence of flaws on the surface of the sphere 1 is inspected by comparing the amount of light received by the light receiving element 3 that receives the reflected light from the surface of the sphere 1 with a preset reference amount of light for determining the presence or absence of flaws.

[0004]

SUMMARY OF THE INVENTION The inspection method for the presence or absence of flaws on the surface of a sphere by scanning spot light described above reduces the width and interval of the meridian part of the surface of the sphere where the spot light is scanned, and an optical sensor using a light emitting and receiving element. The defect inspection accuracy can be increased by increasing the sensitivity of. However, the smaller the width and interval of the meridian part of the surface of the sphere where the spot light is scanned, the larger the number of revolutions of the sphere required to inspect the entire surface of the sphere (about 20 revolutions for a sphere with a diameter of about 10 mm). There is a problem that the inspection time (cycle time) of one sphere becomes long.

Further, the higher the rotation speed of the sphere, the shorter the inspection time for one time, but it is difficult to increase the rotation speed for the following reasons (a) and (b), and the inspection time can be shortened. There was a difficult problem.

(A) As the rotational speed of the sphere increases, the sphere becomes slippery with respect to the rotating roller that holds and rotates the sphere, which makes it difficult to rotate the sphere accurately, and a portion of the sphere surface that is not inspected is generated. There are possibilities. Such slippage of the sphere is promoted by the oil content as the oil content on the sphere surface increases.

(B) The sphere is rotatably held in a fixed position by a rotating roller, a pressing roller, etc., but the higher the rotational speed of the sphere, the greater the sphere pressing force of the roller holding the sphere in the fixed position. The sphere pressing force at this time greatly increases the possibility of flaws on the surface of the sphere. This possibility is larger when the material of the sphere is softer, and it is more difficult to speed up the appearance inspection of the sphere of the soft material.

Further, since the oil content on the surface of the sphere for the reason of the above (a) interferes with an accurate inspection, it is necessary to carefully perform cleaning degreasing and drying treatment on the surface of the sphere before the inspection. The drying process required a long time. Furthermore, if the inspection is not made within 1 day after the cleaning and degreasing and drying treatment of the sphere, the surface condition of the sphere changes due to moisture and the like, which makes it difficult to increase the rotation speed.
There was a management constraint that the appearance inspection had to be done early within the day.

It is an object of the present invention to provide a rotating body appearance inspection device which can easily inspect the surface of a rotating body such as a sphere with high accuracy and at high speed.

[0010]

SUMMARY OF THE INVENTION The present invention is an apparatus for optically inspecting the appearance of the entire surface of a rotating body by rotating the rotating body at least once in a predetermined direction at a fixed position. As a substantially circular cam-shaped drive roller that rotates in a predetermined direction and has a concave portion capable of accommodating the rotating body on the outer periphery, and one rotating body is supplied to the upper surface position of the outer periphery of the drive roller
The fixed distribution holding portion that rotatably holds the supplied rotating body at a fixed position on the upper surface of the outer periphery of the drive roller, and the surface of the rotating body that is held at the fixed position on the upper surface of the drive roller, is orthogonal to the rotation axis of the rotating body. And an appearance detection section including a plurality of photoelectric sensors that project inspection light and receive reflected light on each of a plurality of continuous circumferential portions that are divided in the direction of cutting. In this inspection device, the rotation of the driving roller causes the rotating body held at a fixed position on the upper surface of the outer periphery of the driving roller to rotate one or more rotations in a predetermined direction, and during this period, the appearance detecting unit inspects the entire surface of the rotating body. When the recess on the outer periphery of the drive roller moves to the position of the upper surface of the outer periphery, the tested rotating body is dropped into the recess and discharged outside the drive roller.

A fixed distribution device that supplies the rotating bodies one by one to the upper surface of the outer periphery of the drive roller by opening and closing the fixed distribution holding portion in association with the rotation of the drive roller, and the fixed distribution device. It may be configured with a roller device that rotatably holds the rotating body at a fixed position on the upper surface of the outer periphery of the driving roller.

When one rotating body is supplied to the upper surface of the outer circumference of the rotating drive roller and is held in a fixed position to rotate the drive roller, the rotating body is rotated by the frictional force generated by the rotation of the drive roller. It is driven by anti-opposition. Then, while the rotating body makes at least one revolution, the entire surface of the rotating body is inspected for appearance by a plurality of photoelectric sensors of the appearance detecting section, and after this appearance inspection, the drive roller is rotated so that the concave portion on the outer periphery is located at the upper surface position. When moved, the inspected rotating body falls into the recess, and the rotating body is discharged from the recess when the recess is lowered from the upper surface position by further rotation of the driving roller. That is,
By continuously rotating the drive roller in a predetermined direction, the rotor is delivered in a fixed manner, the surface is inspected by rotating the rotor at a fixed position in a predetermined direction, and the rotor is discharged in series. The appearance inspection of the surface is possible only by rotating the rotating body at least once, and the inspection time for one rotating body including a series of operation time for supplying and discharging the rotating body is shortened.

Further, by shortening the inspection time of the rotating body, the rotating body can be rotated at a low speed, and further, the rotating body holding force by a roller or the like which holds the rotating body at a fixed position on the drive roller by this low speed rotation. To prevent scratches on the surface of the rotor, and to reduce the effects of oil and moisture on the surface of the rotor, eliminating the need for cleaning, degreasing and drying treatment on the surface of the rotor before inspection. In addition to doing this, inspection in oil is also possible.

[0014]

DETAILED DESCRIPTION OF THE INVENTION The device of the present invention will be described below with reference to FIGS. 1 to 6 and 8. However, in the following description, a sphere is used as an example of the rotating body.

FIG. 1 is for explaining a method of inspecting the presence or absence of a flaw on the surface of a sphere by the apparatus of the present invention shown in FIGS. 2 to 6. The outline of the inspecting method will be described first. The sphere 1 is supplied and held rotatably at a fixed position on the upper surface of the outer periphery of the substantially circular cam-shaped drive roller 5 having a horizontal rotation axis and rotating in a predetermined direction. The drive roller 5 is rotated in the predetermined direction indicated by the arrow in FIG.
Is driven to rotate at a fixed position in the opposite direction to the drive roller 5.

On the other hand, on the surface of the sphere 1, a plurality of circumferential portions m which are continuous in the slicing direction orthogonal to the rotation axis X of the sphere 1,
, And one photoelectric sensor 21, ... Is fixedly arranged corresponding to each of the divided circumferential portions m ,. Each of the plurality of photoelectric sensors 21 includes, for example, an optical fiber 22, and a light projecting element and a light receiving element (not shown) optically coupled to the optical fiber 22. The optical fibers 22, ... Are fixedly arranged in a radial array on the same plane, and their tips (detection portions) follow the surface shape of the spherical body 1, that is, the rotating shaft bipolar electrodes on the surface of the spherical body 1 are opposite ends. Are arranged in an arc line shape and face each of the corresponding divided circumferential portions m, ... Of the sphere 1 from a fixed distance, and the optical axis of each tip is directed to substantially the center of the sphere 1. The interval between the optical fibers 22, ... Is appropriately set according to the size of the sphere 1, the size of the flaw to be detected, and the like. A plurality of photoelectric sensors 21, ... Are configured by selectively optically coupling a light projecting element and a light receiving element at the rear end of each optical fiber 22 ,.

The sphere 1 is composed of a driving roller 5 which rotates in a predetermined direction.
Is rotated at a fixed position, and the photoelectric sensors 21, ... Are simultaneously operated. Each photoelectric sensor 21 projects light from the tip (detection portion) of the optical fiber 22 to each circumferential portion m of the sphere 1, receives the reflected light, and outputs an output signal corresponding to the received light amount. Is output to a flaw presence / absence inspection circuit (not shown). The flaw presence / absence inspecting circuit inspects the presence / absence of flaws on the surface of the sphere 1 by comparing the input signal with a preset reference value for flaw presence / absence determination. Each photoelectric sensor 21,
... performs an operation for detecting the presence / absence of a flaw in each circumferential portion m of the sphere 1, so that the sphere 1 is moved at an angle of at least 360 °.
When rotated, the entire area of each circumferential portion m, ... Is inspected and the entire surface of the sphere 1 is inspected.

When the surface defects of the sphere 1 are inspected by the photoelectric sensors 21, ... As described above, a threshold value which is a reference for determining the presence / absence of a defect may be set. For example, the output value of the OK model without flaws is set, the output value of the NG model with flaws is set, and the threshold value is set between these two output values. O
In order to avoid the influence of disturbance, a sphere with a cloudy surface corresponding to 70 to 80% of the amount of non-defective product reflected light is used as the K model, and as an NG model, the cloudiness of the surface corresponding to the reflected light amount of the flaw to be detected is used. You can use a spherical body. When the threshold value is set as described above, when the sphere 1 has a flaw, if the flaw corresponds to an output equal to or less than the threshold value, each photoelectric sensor 21, ... Any one of them detects a flaw, and it is determined that there is a flaw.

Next, a concrete example of the apparatus of the present invention for carrying out the spherical appearance inspection method of FIG. 1 will be described with reference to FIGS.
2 and 3 are side views at the start and end of the inspection of rotating the sphere 1 on the upper surface of the outer periphery of the drive roller 5, and FIGS. 4 and 5 show the appearance inspection of the sphere 1. It is a side view at the time of a later sphere discharge and fixed distribution supply.

In the spherical appearance inspection apparatus of the embodiment shown in the figure, the driving roller 5 which rotates in a predetermined direction at a fixed position, and the spherical bodies 1 are supplied one by one to the upper surface position of the outer periphery of the driving roller 5 and fixed at a fixed position. It is composed of a fixed distribution holding unit 10 that holds it rotatably, and an appearance detection unit 20 that optically inspects the surface of the sphere 1 that rotates at a fixed position for flaws.

A concrete example of the driving roller 5 is shown in FIG. The drive roller 5 has a substantially circular cam structure, and the center horizontal drive shaft 4
It is supported by and rotates in the direction of the arrow. The outer periphery of the drive roller 5 is divided into a concave portion 6, an input allocation portion 7 and an inspection allocation portion 8. The recessed portion 6 is a recessed portion, a cutout, or the like having a size that allows the single spherical body 1 to move in and out with a margin. Input allocation section 7
Is the outer circumference extending from one end of the recess 6 (the end on the trailing side when rotating), and assuming that the drive roller 5 is a circular cam having a radius r, the input allocation portion 7 has a radius shown by a chain line in FIG. It is formed as a cam surface obtained by cutting the outer periphery of r with a depth d. The inspection allocating portion 8 is a circular cam surface having a radius r and is formed to extend from the input allocating portion 7 to the leading end of the concave portion 6.

A cam 9 is fixed to a part of the side surface of the drive roller 5. The cam 9 is an arcuate cam having a radius flush with the bottom of the recess 6 and is arranged between the recess 6 and the allocation portion 7 for making. The cam 9 is for interlocking the constant distribution holding device 10 with the drive roller 5 as described later.

The fixed distribution holding device 10 includes, for example, the driving roller 5
An inclined chute 11 that supplies the sphere 1 toward the upper surface of the outer periphery (the outermost surface at the uppermost position), and a fixed distribution in which one sphere 1 is cut out from the tip of the chute 11 and supplied to the outer peripheral upper surface of the drive roller 5. It is composed of a device 12 and a roller device 13 that holds the sphere 1 supplied to the upper surface of the outer periphery of the driving roller 5 so as to be rotatable in a fixed position.

The distribution device 12 has an upper portion 12a extending above the driving roller 5 and a lower portion 12b extending laterally above the driving roller 5, and the middle of the upper portion 12a and the lower portion 12b is used as a fulcrum. The drive roller 5 is arranged so as to reciprocally swing in the rotation direction. The lower part 12b of the distribution device 12 is driven by the driving roller 5
When the cam 9 presses, the distribution device 12 performs the opening operation shown in FIG. 4, and when the lower part 12b is disengaged from the cam 9, the distribution device 12 is closed by the spring 14 connected to the lower part 12b shown in FIG. Do.

The roller device 13 comprises a support roller 15 and a pressing roller 16 which are fixedly arranged near the outer peripheral upper surface of the drive roller 5. The support roller 15 holds the sphere 1 in a fixed position on the upper surface of the outer periphery of the drive roller 5 and rotatably holds the sphere 1, and the holding roller 16 rotatably presses the sphere 1 toward the drive roller 5 and the support roller 15. The support roller 15 and the pressing roller 16 rotate following the sphere 1 to hold the sphere 1 at a fixed position.

The appearance detecting section 20 is installed between the support roller 15 and the pressing roller 16. The appearance detection unit 20 includes a sensor head that radially supports a plurality of optical fibers 22, ... On the same plane, and the sensor head is obliquely fixed between the support roller 15 and the pressing roller 16. The sphere 1 in which the tips of the optical fibers 22, ... Of the sensor head are held in place on the outer peripheral upper surface of the drive roller 5.
Opposed in a semi-circular array.

The sphere appearance inspection apparatus described above is provided with the drive roller 5
With the continuous rotation of, the operations of constant distribution, appearance inspection, and discharge of the sphere 1 are continuously and automatically performed. Each of these operating states is shown in FIGS.

When the drive roller 5 rotates in a predetermined direction and the concave portion 6 is present in front of the outer peripheral upper surface position (state of FIG. 3), the cam 9 contacts the lower portion 12b of the distribution device 12.
When the drive roller 5 is further rotated in this state, the lower portion 12b of the distribution device 12 is pressed by the cam 9 against the spring force of the spring 14, and the distribution device 12 swings as shown in FIG. open. By this opening operation, one spherical body 1 existing at the tip of the chute 11 is dropped and supplied onto the outer peripheral upper surface of the drive roller 5.
The second spherical body 1 from the tip of the chute 11 hits the upper portion 12a of the open distribution device 12 so as not to drop. The outer peripheral upper surface of the drive roller 5 on which the spherical body 1 at the tip of the chute 11 falls serves as a throw-in allocation portion 7 extending from the concave portion 6, and a portion corresponding to a step d corresponding to a cutting allowance from the radius r of the allocation portion 8 is formed. Only the stop position of sphere 1 goes down, sphere 1
Does not hit the pressing roller 16 but passes under it and stops at a fixed position where it comes into contact with the support roller 15.

When the drive roller 5 is further rotated, the cam 9 is disengaged from the lower portion 12b of the distribution device 12, and the distribution device 12 is returned to the original closed position by the restoring force of the spring 14, as shown in FIG. It returns and blocks the ball falling from the chute 11. The spheres 1 supplied to the upper surface of the outer periphery of the drive roller 5 simultaneously.
However, while being driven by the rotation of the drive roller 5, it relatively moves from the input allocation section 7 to the inspection allocation section 8, and at the time of this relative movement, the sphere 1 rises by the amount of the step d (about 1 mm) and the pressing roller. Abut on 16.

Then, as shown in FIG. 2, the drive roller 5
When the allocating portion 8 of the inspection of FIG. 1 enters the outer peripheral upper surface position, the spherical body 1 is the pressing roller 16 and the driving roller 5 and the support roller 1
The roller 5 rotates in a direction opposite to the rotation direction of the drive roller 5 while being pressed by the constant pressure 5 and held in a fixed position. While the drive roller 5 rotates from the inspection start stage of FIG. 2 to the inspection end stage of FIG. 3, the sphere 1 is rotated at least once over the entire length of the allocation section 8 for inspection, and the appearance detection section 2
0 operates to perform visual inspection of the entire surface of sphere 1. still,
The rotation speed of the sphere 1 during the inspection period of FIGS. 2 to 3 is 1
The above values are acceptable, but in reality, about 1.5 to 3 rotations are desirable for stable appearance inspection.

When the drive roller 5 is further rotated from the inspection completion stage of FIG. 3, the recess 6 moves to the position of the inspected sphere 1 as shown in FIG.
Is dropped, and at the same time, the constant distribution device 12 is opened by the cam 9 to perform the next constant distribution of the sphere 1. When the drive roller 5 further rotates and the recess 6 moves to the side surface of the drive roller 5, the inspected sphere 1 in the recess 6 is discharged from the recess 6 by the centrifugal force of the drive roller 5. Before and after this discharge, the appearance inspection of the next sphere 1 is performed.

As described above, the appearance inspection for the presence or absence of flaws on the entire surface of the sphere 1 can be performed by rotating the sphere 1 at least once. As a result, one inspection time is significantly longer than one rotation time of the sphere 1. Shortened. This inspection time can be greatly shortened even if the sphere 1 is rotated at a slightly lower speed than in the conventional case. When the sphere 1 is rotated at a low speed, the pressing force of the pressing roller 16 on the sphere 1 is set to be small, and the sphere 1 is rotated by each roller.
It is possible to prevent the flaw from being scratched. Further, even if the sphere 1 rotates once and rotates at a low speed, even if some oil or moisture is present on the surface of the sphere 1 and slippage occurs in the rotation of the sphere 1, accurate inspection is possible without being affected by this. Become. Therefore, it is possible to simplify or eliminate the cleaning degreasing and drying process before the inspection of the sphere 1.

The device of the present invention is not limited to the above-mentioned spherical body, but is a rotating body, that is, a shape generated when a specific shape on a plane is rotated around one axis on the plane, for example, a roller of a cylindrical roller bearing. It is also applicable to such a cylindrical body.

FIG. 8 is a side view of an inspection apparatus suitable for inspecting such a cylindrical roller. This device is characterized in that the press roller 16 is driven up and down by a cam 9 provided separately from the drive roller 5 to perform the constant distribution of the cylindrical roller 1. The configuration and operation of this device will be described below. explain.

The drive roller 5 and the cam 9 are connected via a gear (not shown), and both rotate at a rotation ratio of 1: 1. When the driving roller 5 is driven to rotate the cam 9, the pressing roller 16 is temporarily pushed up, and at the same time, the cylindrical roller 1 extruded by the fixed brush 17 mounted coaxially with the cam 9 is inspected from the chute 11. It is thrown into the section (Fig. C). At this time, the input allocating portion 7 reaches the upper portion, and the cylindrical roller 1 contacts the support roller 15 without contacting the pressing roller 16.

When the cylindrical roller 1 enters the inspection section, the inspection allocation section 7 of the drive roller 5 reaches the upper part. Further, the pressing roller 16 is lowered by the cam 9, the cylindrical roller 1 is raised by about 2 mm by the driving roller 5, and is driven and rotated while being supported by the pressing roller 16 under a constant inspection load. The cylindrical roller 1 rolls for one rotation or more, and the entire surface is inspected by the optical fibers 22 and 23 arranged along the outer peripheral surface and both end surfaces of the cylindrical roller 1 (d).
(Figure and a figure). The optical fibers 22 for inspecting the outer peripheral surface are arranged in a straight line parallel to the axis of the cylindrical roller 1, and the optical fibers 23 for inspecting the end surface are arranged in a line in the diametrical direction so as to face the end surface of the cylindrical roller 1. Has been.

After the inspection is completed, the recess 6 reaches the upper part,
The cylindrical roller 1 is pushed by the pressing roller 16 into the concave portion 6 and falls (FIGS. B and c), is conveyed by the rotation of the driving roller 5, and is ejected from the ejection portion 30 (FIG. D). Further, immediately after the cylindrical roller 1 is ejected, the pressing roller 15 is temporarily pushed up by the cam 9, and at the same time, the next cylindrical roller 1 is put into the inspection section by the fixed brush 17, and the above-described movement is repeated.

[0038]

According to the present invention, by simply rotating the drive roller continuously in a predetermined direction, the rotary roller is supplied to the drive roller in a fixed manner, and the surface is inspected by rotating the rotary body in a predetermined direction in a predetermined direction. The rotating body is continuously discharged from the drive roller, and the appearance of the entire surface of the rotating body can be inspected only by rotating the rotating body at least once with the drive roller. The inspection time for one rotating body including a series of operation times is shortened.

By shortening the time for inspection of the rotating body, the rotating body can be rotated at a low speed, and the holding force of the rotating body by a roller or the like for holding the rotating body at a fixed position on the driving roller is reduced to reduce the surface of the rotating body. It is possible to prevent scratches and reduce the effect of oil and moisture on the surface of the rotor, eliminating the need for cleaning, degreasing and drying the rotor surface before inspection. It becomes possible to inspect. If the inspection is performed in the liquid, the drying step after the cleaning of the cylindrical roller and before the inspection becomes unnecessary, and erroneous determination due to adhesion of dust or the like can be suppressed.

Further, since the rotational force of the drive roller is utilized to perform the constant distribution of the rotary body, the rotation of the rotary body, and the discharge of the rotary body, it is possible to reduce the drive source such as a motor required for operating the apparatus. Equipment cost reduction and size reduction can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part for explaining an outline of a sphere appearance inspection method by the device of the present invention.

FIG. 2 is a side view of a main part showing an embodiment of the present invention.

FIG. 3 is a side view of the apparatus of FIG. 1 at the end of sphere inspection.

FIG. 4 is a side view of the apparatus shown in FIG.

5 is a side view of the apparatus shown in FIG. 1 before sphere ejection and inspection.

FIG. 6 is a side view of a drive roller in the apparatus shown in FIG.

FIG. 7 is a perspective view of a sphere whose appearance is inspected by a conventional device.

FIG. 8 is a side view showing another embodiment of the device of the present invention.

[Explanation of symbols]

 1 Sphere (Rotating Body) m Plural Circumferential Portions 4 Drive Shaft 5 Drive Roller 6 Recess 10 Fixture Holding Part 12 Fixing Device 13 Roller Device 20 Appearance Detector 21 Photoelectric Sensor

Claims (2)

[Claims] 1. A substantially circular cam-shaped drive roller that rotates in a predetermined direction around a horizontal drive shaft and has a concave portion capable of accommodating the rotating body on the outer periphery, and the rotating body on the upper surface of the outer periphery of the drive roller. A fixed-distributed holding unit that supplies one by one and rotatably holds the supplied rotating bodies at a fixed position on the upper surface of the outer periphery of the drive roller, and this rotation of the surface of the rotating body held at the fixed position on the upper surface of the drive roller. An appearance detection unit including a plurality of photoelectric sensors that project inspection light and receive the reflected light on each of a plurality of continuous circumferential portions that are sectioned in a circle cutting direction that is orthogonal to the body rotation axis. Then, by the rotation of the drive roller, the rotating body held at a fixed position on the upper surface of the outer periphery of the driving roller is driven to rotate for one rotation or more in a predetermined direction, and during this period, the appearance detecting unit performs an appearance inspection of the entire surface of the rotating body, The recess on the outer periphery of the drive roller is outside Rotating body appearance inspection apparatus characterized by not drop inspected rotating body recess where moved to the upper surface position to discharge out of the driving roller. 2. A fixed-distributor device that supplies the rotating bodies one by one to the upper surface position of the outer circumference of the drive roller by opening and closing the fixed-distributed holder in conjunction with the rotation of the drive roller, and from this fixed-distributor device. 2. The rotating body appearance inspection apparatus according to claim 1, further comprising: a roller device that rotatably holds the supplied rotating body at a fixed position on the upper surface of the outer periphery of the drive roller.