JP2003276831A - Inner/outer surface inspection device of cylindrical article and inspection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To automatically and accurately inspect an inner surface and an outer surface of a cylindrical article by one inspection step. <P>SOLUTION: An outer peripheral surface of a cap 1 is retained by the first retaining means 15 and the retaining means 1 is reversed by the first rotation means 16 and is transferred to the first receiving means 17. The cap 1 is rotated by approximately one rotation by the second rotation means 18 making a center axis of this receiving means 17 as a rotation axis. During this, an inner surface of the cap 1 is photographed and the inspection of the cap 1 is carried out. Subsequently, the cap 1 is retained by the second retaining means 19 and is rotated by 180° to a normal direction of the first rotation means 16. Thereby, the cap 1 is transferred to the second receiving means 20 while directing a bottom part 2 of the cap to an upward direction. The cap 1 is rotated by approximately one rotation by the second rotation means 18 making a center axis of the second receiving means 20 as a rotation axis. During this, an outer surface of the cap 1 is photographed by the second camera means 14 and an existence of a flaw and color shade on the outer surface of the cap 1 is inspected. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and an inspection method for inspecting an inner surface and an outer surface of a cylindrical object such as a bottomed or open-bottomed cylinder or a square tube molded of plastic, and more particularly, molded by plastic. The present invention relates to an inspection device and an inspection method suitable for inspecting an inner surface and an outer surface of a cap of a container such as a bottomed cosmetic product.

[0002]

2. Description of the Related Art Conventionally, a molded product molded with a plastic is molded by a conveyor belt in the process of assembling the molded product in order to inspect the molded state inside the molded product. Take an image on the conveyor belt with an image capturing camera,
The quality of a molded product is inspected by comparing it with an image of a non-defective product recorded in advance.

Further, the outer appearance of the molded product has been visually inspected after the molded product has been assembled into a product.
According to this method, it is necessary to arrange an inspector, labor costs are required, and not only the cost becomes high, but also the inspection may be overlooked or accuracy may be deteriorated.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve such a problem, and provides an inspection device capable of automatically and accurately inspecting an inner surface and an outer surface of a cylindrical object in one inspection step. The purpose is to provide.

[0005]

According to a first aspect of the present invention, there is provided an inspection device for inspecting an inner surface and an outer surface of a cylindrical object, and a conveying means for conveying the cylindrical object to an inspection standby position. At least two holding means for respectively holding the outer peripheral surface of the tubular object at the standby position and the tubular object at the first inspection position in which the tubular object at the standby position is reversed, and arranged at the first inspection position. And a first receiving means for receiving and holding the tubular object at the standby position, a second receiving means for receiving the tubular object at the first inspection position and holding it at the second inspection position, and the standby position. To the first receiving means and the tubular object in the first receiving means to the second receiving means, the two holding means are reversed together with the tubular object, and then the original position is restored. Rotation means for returning to A second rotating means for rotating the first receiving means and the second receiving means on its central axis, and one of an inner surface and an outer surface of the cylindrical object held by the first receiving means at the first inspection position. And at least one camera means for observing the other surface of the outer surface and the inner surface of the cylindrical object held by the second receiving means at the second inspection position. By the inspection device characterized by inspecting the inner surface and the outer surface of the cylindrical object by comparing the image captured by and the reference image, the inner surface and the outer surface of the cylindrical object in one inspection step, Inspection can be performed automatically and accurately.

According to the second aspect of the present invention, the holding means is located at the standby position, the tubular object at the first inspection position in which the tubular object is reversed, and the first inspection position. Four holding means for respectively holding an outer peripheral surface of the tubular article at the second inspection position where the tubular article is inverted and the tubular article at the intermediate position where the tubular article at the second inspection position is inverted; The first to be placed at the inspection position and to receive and hold the cylindrical object at the standby position
Receiving means, a second receiving means for receiving the tubular object at the first inspection position and holding it at the second inspection position, and a tubular object at the second inspection position for receiving the tubular object at the intermediate position. A third receiving means for holding the tubular object at the standby position up to the first receiving means;
The tubular object in the receiving means to the second receiving means, the tubular object in the second receiving means to the intermediate position, and the tubular object in the intermediate position to the second conveying means, the tubular shape The inspection apparatus according to claim 1, further comprising: a first rotating means that simultaneously reverses the four holding means together with the object and then returns the original position to the original position. The cylindrical object can be reliably transported to the next process, and the inspection device according to the present invention can be easily interposed between the first transport process and the next transport process without making a large change. Become.

According to the third aspect of the present invention, the camera means is the inspection apparatus according to the first or second aspect in which the camera means is arranged at the first inspection position and the second inspection position, respectively. It is possible to inspect the inner surface and the outer surface of the tubular object.

According to the invention of claim 4, the cylindrical object conveyed in the standing state is held by the holding means in the standing state, and the holding means is inverted to convey the cylindrical object to the first receiving means. Then, at the position of the first receiving means, one of the inner surface and the outer surface of the cylindrical object is imaged and inspected by the camera means,
The second holding means inverts the tubular object at the position of the first receiving means and conveys it to the second receiving means, and at the position of the second receiving means, the other surface of the outer surface or the inner surface of the tubular object is taken by the camera means. According to the method for inspecting the inner surface and the outer surface of the tubular object, which is characterized by performing the imaging inspection, the inner surface and the outer surface of the tubular object can be automatically and easily inspected.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an image pickup apparatus of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view taken at the center of a cap that covers a container made of glass or plastic that contains a lotion or the like to be inspected by the inspection apparatus of the present invention.
The cap 1 has a spherical bottom portion 2 on the upper surface and has an opening 3 on the lower surface, and is made of plastic. On the inner surface of the cap 1, a thread groove 4 screwed into a screw thread formed on the peripheral edge of the container opening (not shown) and on the upper part thereof, a cylindrical protrusion that closely contacts the upper edge of the container opening and prevents liquid leakage. The part 5 is formed.

In order to give a high-class feeling to this kind of cosmetics container, the surface quality and color appearance of the outer surface of the cap 1 are important factors, and there are unevenness in color due to scratches and resin burning that are likely to occur during molding. Must be rejected as defective. Conventionally, such a selection has been performed visually by an inspector, but since the diameter of the cap 1 is as small as a few cm, it is easy to overlook scratches and color unevenness, and there is a problem in accuracy and labor costs. There was also a problem that the cost went up with the soaring price.

On the other hand, since the cap 1 is tubular, the screw groove 4 formed on the inner surface thereof and the protruding portion 5 at the back thereof are formed.
As in the conventional inspection device, by simply arranging the opening 3 of the cap 1 upward on the conveyor belt and taking an image from directly above the opening 3 with the camera means, the resin of the screw groove 4 and the protruding portion 5 can be obtained. Insufficient injection (short shot) of the thread groove 4 or the depression 5 in the protrusion 5 cannot be sufficiently inspected.
When the protrusion 5 has a recess, problems such as liquid leakage occur.

The present invention is intended to provide an inspection apparatus capable of solving such problems.

2 and 3 show an inspection apparatus according to an embodiment of the present invention. FIG. 2 shows a plan view with the upper plate 6 removed, and FIG. 3 shows the left side of FIG. The side view which removed the side plate 7 of one side is shown.

The molding cap 1 taken out from the molding device (not shown) is conveyed into the inspection device by the third conveyor belt 9 in a standing state with the bottom 2 up and the opening 3 down. The cap 1 conveyed to is transferred to the receiving table 10 in the standing state, and further transferred from the receiving table 10 to the first conveyor belt 8 in the same state.

As described above, the cap 1 conveyed by the first conveyor belt 8 is moved from the first conveyor belt 8 to the predetermined position of the standby station 12 by the pushing device 11, and the standing state with the bottom 2 up. Then, the first camera means 1
A standby state for performing inspection according to 3 is entered.

The outer peripheral surface of the cap 1 in the standby state is held by the first holding means 15, and the holding means 15 is moved by the first rotating means 16 to 1 in the carrying direction.
The cap 1 is rotated 80 degrees, inverted with the opening 3 facing upward, and transferred to the first receiving means 17. The cup 1 transferred to the first receiving means 17 has a second axis with the central axis of the receiving means 17 as a rotation axis, as will be described later.
The rotating means 18 makes about one rotation. During this time, the first
The inner surface of the cap 1 is imaged by the camera means 13, and the presence or absence of a short shot of the screw groove 4 or the protrusion 5 of the cap 1 is inspected by comparing with the reference image (first inspection step). When this first inspection step is completed, the first rotating means 16 is reversed by 180 degrees in the opposite direction, and the first holding means 15 returns to the original standby position. Then, the cap 1 held by the first receiving means 17 is replaced by the second holding means 1
9 and is rotated by 180 degrees in the forward direction of the first rotating means 16 so that the bottom 2 of the cap 1
Is transferred to the second receiving means 20 with the above. The cap 1 received by the second receiving means 20 is substantially rotated by the second rotating means 18 with the central axis of the second receiving means 20 as a rotation axis, as described later. During this period, the outer surface of the cap 1 is imaged by the second camera means 14 and compared with a reference image to inspect the outer surface of the cap 1 for the presence or absence of scratches or color unevenness (second inspection step). Second
The holding means 19 holds the first holding means 15 after completion of this inspection.
Similarly, the first rotating means 16 reversely rotates and returns to the original position. Subsequently, the cap 1 held by the second receiving means 20 is held by the third holding means 21, and the cap 1 is set to 1 similarly to the first and second holding means 15 and 19.
It is rotated by 80 degrees and transferred to the third receiving means 22.
In the third receiving means 22, the cap 1 is held with the opening 3 facing upward, and the cap 2 is attached to the next second conveyor belt 24.
The bottom part 2 of the cap 1 is in an intermediate position for being transferred in an upright state. To transfer the cap 1 from this intermediate position to the second conveyor belt, the third position of the intermediate position is used.
The cap 1 held by the receiving means 22 is the fourth
It is held by the holding means 23, and is turned over by the 180 ° rotation of the fourth holding means 23 by the first rotating means 16, that is, transferred to the receiving station 25 with the bottom 2 facing upward. Cap 1 transferred to receiving station 25
Are transferred to the second conveyor belt 24 with the bottom portion 2 facing upward, that is, in the same standing state in which they are conveyed by the first conveyor belt 8.

The cap 1 transferred to the receiving station 25 is passed by the selecting means 30 and 31 which are operated by the electromagnetic plunger 29 or the like in response to the results of the inspections in the first and second inspection steps, Second on the right
Transferred to the conveyor belt 24, and then the product stocker 2
Stored at 7. On the other hand, the rejected one is the waste port 2 on the left.
6 and is accumulated in the storage box 32 and used as recycled plastic.

In FIGS. 2 and 3, 28 is a first and a second.
It is a monitor display for displaying the inner surface and the outer surface of the cap 1 imaged by the camera means 13, 14.

As described above, in order to inspect the inner surface and the outer surface of the cap 1, the first holding means 15 and the second holding means 19 are used, and these holding means 15 and 19 are used for the first rotating means 1.
By means of 6, the cap 1 is connected to the first receiving means 17 and the second
It is sufficient to reverse transfer to the receiving means 20, but the cap 1 in the case where the cap 1 is reversed four times by using the third holding means 21 and the fourth holding means 23 and is conveyed by the first conveyor belt 8. If it is transferred to the second conveyor belt 24 in the same state as the above-mentioned conveyance state, the inspection step can be easily incorporated into the conventional manufacturing step without adding a step of inverting the cap 1 in the next step. .

In order to inspect the inner surface and the outer surface of the cap 1, at least one first camera means 13 is arranged,
The camera means 13 may be moved between the first inspection step and the second inspection step, but if the camera means is arranged in each of the first inspection step and the second inspection step, the inner surface and the outer surface of the cap 1 are simultaneously moved. It is preferable because it can be inspected and can be rapidly inspected.

Further, in order to sufficiently inspect the inner surface and the outer surface of the cap 1, in the first inspection step and the second inspection step, the first receiving means 17 and the second receiving means 20 are rotated almost once to make the cap 1 It is necessary that the first and second camera means 13 and 14 capture substantially the entire inner and outer surfaces of the image. In this case, in order to sufficiently image the inner surface and the outer surface of the cap 1 with the first and second camera means 13 and 14, as shown in FIG. The optical axis A of the first and second camera means 13 and 14 and the conveying surface B of the cap 1 are directed toward C
It is arranged so as to be inclined at an angle of, for example, 45 degrees. As shown in FIGS. 5 and 6, the inclination angles C and the fields of view of the camera means 13 and 14 are the first camera means 1.
3, a visual field range D1 in which the thread groove 4 and the protrusion 5 on the inner surface of the cap 1 can be imaged and a visual field range D2 in which the outer surface 34 portion of the outer surface of the cap 1 not held by the first receiving means 17 is imaged. In addition, the second camera means 14 is set to have a visual field range D3 in which the bottom portion 2 of the cap 1 and the outer side surface 34 can be imaged. By setting in this way, it is possible to image almost the entire inner surface and outer surface of the cap 1. In this case, the cap 1 is replaced by the receiving means 17 and 2
Although 0 may be continuously rotated almost once by the second rotating means, it may be intermittently rotated almost once every 60 degrees depending on the visual field range. As described above, in the case of intermittent rotation, a still image can be captured and inspected for each, and the inspection can be performed with higher accuracy.

A CCD line image sensor is preferably used for the camera means 13 and 14, and an image picked up by this image sensor is converted into binary digital data of theoretical values "1" and "0". The screw groove 4 and the protruding portion 5 on the inner surface of the cap 1 and the resin burnt portion on the outer surface of the cap 1 are indicated by white lines and areas, and a short shot occurs in the screw groove 4 and the protruding portion 5 to cause a depression. In this case, this recessed part is not displayed as a white continuous line,
It is displayed with intermittent white lines, and it can automatically detect that there is a defect.

In the present invention, an area camera can be effectively used instead of the CCD line image sensor. In addition,
Reference numeral 33 in the drawing denotes an illuminating means for irradiating each cap 1 in order to obtain a clear image of the cap 1 held by the first receiving means 17 and the second receiving means 20.

Next, the first and second rotating means 1 of the present invention
An example of Nos. 6 and 18 will be described with reference to FIGS. 7, 8 and 9. 7 is an enlarged plan view of the first inspection step and the second inspection step portion of FIG. 2 in which the combined portion of the rack gear and the pinion gear is cut away, and FIG. 8 is a view of the first inspection step and the second inspection step portion of FIG. FIG. 9 is an enlarged plan view in which the thrust bearing portion is cut out, and FIG. 9 is a side view seen from below in which the thrust receiving portion is cut out in the first receiving means 17 portion.

As is apparent from FIGS. 7 and 9, the first to fourth holding means 15, 19, 21 and 23 are the cap 1
Is provided with a holding portion 35 having an arcuate inner surface that conforms to the outer surface shape of the cap 1. The holding portion 35 is actuated by air pressure, hydraulic pressure or the like to move up and down (see FIG. 7).
4 is designed to be gripped or separated. These holding means include a rack gear 36 and a pinion gear 37, which will be described later.
A holding means 15, which is attached to one end of a lever 38 which is connected to a rotary shaft 39 which is rotated by 180 degrees by means of and which holds the cap 1 by the rotation of the rotary shaft 39 by 180 degrees,
19, 21 and 23 are reversed from the state of the cap 1 in the gripped position, that is, in the first holding means 13, the cap 1
The cap 1 is transferred to the respective receiving means 17, 20, 22 and the receiving station 25 from the state in which the bottom portion 2 is on the upper side to the state in which the opening 2 is in the upper side. When the cap 1 is transferred to the receiving means 17, 20, 22 respectively, the holding means 15, 19, holding the cap 1,
21 and 23 separate the cap 1 from each other, then operate the rack gear 36 and the pinion gear 37 to reverse the rotation shaft 39, and return only the holding means 15, 19, 21, 23 to the original position. At the return position, the holding portion 35 is actuated again to grip and rotate the cap 1, and the cap 1 is delivered to the respective receiving means 17, 20, 22 in the same manner as described above. After that, the same operation is repeated, and the receiving means 17 and 2 of the caps 1 and 2 are turned over while inverting the cap 1.
Transfer cap 1 to 0, 22 and receiving station 25.

Next, the operation of the rack gear 36 will be described with reference to FIGS. 7 and 8. The rack gear 36 has one end connected to the electromagnetic plunger 40, a connecting plate 42 connected to the two thrust shafts 41 at the central portion, and a connecting plate 43 connected to the end portions of the two thrust shafts 41.
Are linked to. Therefore, as the electromagnetic plunger 40 moves up and down, the rack gear 36 also moves up and down, and as the rack gear 36 moves up and down, the four pinion gears 37 meshed with the rack gear 36 rotate in synchronization with each other. The rotary shaft 39 connected to rotates the rotary shaft 3
With the rotation of 9, the holding means 15, 19, 21, 23 are synchronously rotated and rotated 180 degrees at the same time. (See FIG. 8) Reference numeral 44 denotes a thrust bearing for smoothly operating the thrust shaft, which is attached to the L-shaped base plate 45 with a screw 46.

An electromagnetic plunger 40 is also attached to the board 45 by a pinion gear 37 and an L-shaped attachment fitting 47.

Next, the second rotating means for rotating the receiving means 17, 20 will be described with reference to FIGS. 9 and 7.
As shown in FIG. 5, the first and second receiving means 17 and 20 have two types of shapes depending on the condition of receiving and holding the cap 1, and the receiving means 17 and 22.
Has a spherical concave portion 48 so that the bottom portion 2 of the cap 1 can hold the cap 1, and a hole 50 for fitting and attaching the attachment jig 49 of the second rotating means in the center of the bottom surface. . On the other hand, in the case of the second receiving means 20 which holds the bottom portion 2 of the cap 1 in the upward direction, the second receiving means 20 is held substantially at the same position as the opening edge of the cap 1 so as to be held by the edge of the opening 2 of the cap 1. A circular groove 51 having a diameter is formed, and a hole 50 into which a mounting jig 49 of the second rotating means 18 is fitted is formed in the bottom portion, similarly to the first receiving means. (See FIG. 6) These receiving means 17, 2
The shapes of 0 and 22 can be various shapes depending on the shape of the tubular object such as the cap 1 to be inspected, and are not limited to the above shapes.

First and second receiving means 17 and 20
Rotates about its central axis E as a rotation axis, but is attached to the second rotating means 18 for such rotation. As shown in FIGS. 7 and 9, the second rotating means 18 has an upper portion of the rotating shaft 53 held by the bearing bearing 55 attached to the L-shaped substrate 52.
The attachment jig 49 is attached, and the rotary shaft 53 is attached.
A pinion gear 54 is attached to the lower part of the.

The pinion gear 54 is the electromagnetic plunger 5
6, the rack gear 57 is engaged with the rack gear 57, and the rack gear 57 moves up and down as the shaft 58 of the electromagnetic plunger 56 moves up and down (see FIG. 7), and the pinion gear 54 rotates according to the up and down movement of the rack gear 57. . The mounting jig 4 mounted on the rotating shaft by the rotation of the pinion gear 54.
Together with 9, the first and second receiving means 17, 20 mounted on the mounting jig 49 are rotated.

The rack gear 57 is the first rotating means 1 described above.
Similarly to the case of 6, the electromagnetic plunger 56 is connected by both ends of the thrust shaft 60 held by the thrust bearing 61 and the connecting plates 59, 66 connected to the shaft 58 of the electromagnetic plunger 56. Therefore, the rack gear 57 moves up and down by the operation of the electromagnetic plunger 56, and the pinion gear 54 is rotated accordingly, and the receiving means 1
7 and 20 can easily be rotated almost once.

The first and second rotating means in the present invention are
As described above, it is not always necessary to use the rack gear and the pinion gear, and the rotating gear may be used together with the electric motor. However, it is preferable to use the rack gear and the pinion gear because the rotation angle of the receiving means during the intermittent rotation operation can be easily and accurately controlled.

Next, another embodiment of the present invention will be described. FIG. 10 is a plan view with the upper side plate of FIG. 2 removed,
The molded cap 1 is carried into the inspection apparatus of the present invention by the third conveyor belt 9 and transferred to the receiving table 10. The receiving table 10 is attached by a gear 63 so as to be movable up and down, and the cap 1 transferred by the third conveyor belt 9 descends to the position of the first conveyor belt 8 and is first conveyed by the electromagnetic plunger 62. Belt 8
Be transferred to. In this way, when the receiving table 10 is set to be vertically movable, even if the position of the third conveyor belt fed from the molding apparatus is arranged above as shown by the dotted line, the receiving table 10 will be After the cap 1 is received and the cap 1 is received, the cap 1 can be transferred to the first conveyor belt 8 by descending to the position of the first conveyor belt. In addition, reference numeral 68 in FIG. 10 is a stopper for limiting the raising of the receiving table 10.

Further, as shown in FIG. 4, when the caps 1 of good quality after the inspection are stored in the product stocker 27, in order to store as much cap 1 as possible, the back and front parts of the product stocker 27 are stored. The shooter 64 is arranged so as to drop the cap 1, and the cap 1 is dropped along the slope of the shooter 64 and inside the product stocker 27. To drop the shooter 64 to the front of the product stocker 27, the shooter 64 is moved to the upper position shown by the dotted line by the plunger 65, and the cap 1 does not come into contact with the shooter 64 and directly drops from the conveyor belt 24 to drop the product stocker 27. Such a shooter 64 is dropped at the front of 27
Is preferably provided.

The cylindrical material used in the present invention is not limited to the cap 1 described above, and may have a bottomed or non-bottomed cylindrical shape or a rectangular tube shape.

[0037]

According to the inspection apparatus of the invention of claim 1, the outer peripheral surface of the cylindrical object at the standby position and the cylindrical object at the first inspection position in which the cylindrical object at the standby position is reversed. At least two holding means for respectively holding, and a cylindrical object arranged at the first inspection position and at the standby position,
A first receiving means for holding, a second receiving means for receiving the tubular object at the first inspection position and holding it at the second inspection position, and a tubular object at the standby position for the first receiving means and First, the tubular object in the first receiving means is reversed to the second receiving means together with the tubular object, and the two holding means are reversed, and then returned to the original position.
Rotating means, second rotating means for rotating the first receiving means and the second receiving means on its central axis, and at the first inspection position, the inner surface of the tubular object held by the first receiving means or At least one for observing one surface of the outer surface and the other surface of the outer surface or the inner surface of the cylindrical object held by the second receiving means in the second inspection position.
Since the inner surface and the outer surface of the cylindrical object are inspected by comparing the image picked up by the camera means with the reference image, the inner surface and the outer surface of the cylindrical object are integrated into one. In the inspection process, inspection can be performed automatically and accurately.

[Brief description of drawings]

FIG. 1 is a cross-sectional view taken at the center of a cap inspected by an inspection apparatus of the present invention.

FIG. 2 is a plan view with an upper plate 6 removed.

FIG. 3 is a plan view showing a side surface from which a left side plate 7 of FIG. 2 is removed.

FIG. 4 is a plan view showing a state in which a lower plate of FIG. 2 is removed.

FIG. 5 is a sectional view of the cap and the receiving means held by the first receiving means used in the inspection apparatus of the present invention.

FIG. 6 is a sectional view of the receiving means used in the inspection apparatus of the present invention, in which the cap held by the second receiving means is partially cut away.

FIG. 7 is an enlarged plan view in which a combined portion of the rack gear and the pinion gear in the first inspection step and the second inspection step portion of FIG. 2 is cut away.

FIG. 8 is an enlarged view in which the thrust bearing portion of the first inspection process portion and the second inspection process portion of FIG. 3 is cut away.

9 is a side view of the first receiving means 17 shown in FIG. 2 as seen from below, which is cut away.

FIG. 10 is a plan view with the upper side plate of FIG. 2 removed.

[Explanation of symbols]

1 cap 2 bottom 3 openings 4 screw groove 5 Projection 8 First conveyor belt 12 waiting station 13 First camera means 14 Second camera means 15 First holding means 16 First rotation means 17 First receiving means 18 Second rotation means 19 Second holding means 20 Second receiving means 21 Third holding means 22 Third receiving means 23 4th holding means 24 Second conveyor belt 35 holding part 36 rack gear 37 Pinion Gear 39 rotation axis 40 electromagnetic plunger 48 recess 49 Mounting jig 53 rotation axis 54 pinion gear 56 rack gear

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Claims (4)

[Claims] 1. An inspection apparatus for inspecting an inner surface and an outer surface of a cylindrical object, a conveying means for conveying the cylindrical object to an inspection standby position, the cylindrical object at the standby position and the cylindrical object at the standby position. At least two holding means for respectively holding the outer peripheral surface of the tubular object at the first inspection position, which has been reversed, and a tubular object disposed at the first inspection position and receiving and holding the tubular object at the standby position. 1 receiving means, a second receiving means for receiving the tubular object at the first inspection position and holding it at the second inspection position, and a tubular object at the standby position to the first receiving means and the first receiving means. First rotating means for reversing the two holding means together with the tubular object up to the second receiving means, and then returning the tubular object in the receiving means to the original position, the first receiving means and the first receiving means. 2 Receiving means in it A second rotating means for rotating on a mandrel and, in the first inspection position, one of the inner surface and the outer surface of the tubular object held by the first receiving means, and in the second inspection position, the Comparing at least one camera means for observing the other surface of the outer surface or the inner surface of the cylindrical object held by the second receiving means, and comparing the image captured by the camera means with the reference image. An inspection device for inspecting an inner surface and an outer surface of a cylindrical object. 2. The holding means comprises a tubular object at the standby position, a tubular object at a first inspection position in which the tubular object is inverted,
The four cylindrical members at the first inspection position are reversed, and the cylindrical member at the second inspection position and the cylindrical member at the second inspection position are respectively reversed. A holding means; a first receiving means which is arranged at the first inspection position and receives and holds the tubular object at the standby position;
Second receiving means for receiving the tubular object at the inspection position and holding it at the second inspection position; and third receiving means for receiving the tubular object at the second inspection position and holding the tubular object at the intermediate position. And the cylindrical object in the standby position is the first
To the receiving means, the tubular object in the first receiving means to the second receiving means, the tubular object in the second receiving means to the intermediate position, and the tubular object in the intermediate position to the second Up to the transport means together with the tubular object
The inspecting device according to claim 1, further comprising a first rotating unit that reverses the individual holding units at the same time and then returns to the original position. 3. The inspection apparatus according to claim 1, wherein the camera means is arranged at each of a first inspection position and a second inspection position. 4. The cylindrical object conveyed in the standing state is held by the holding means in the standing state, the holding means is inverted to convey the cylindrical object to the first receiving means, and the first receiving means. At one position, one of the inner surface and the outer surface of the cylindrical object is imaged and inspected by the camera means, and the second holding means inverts the cylindrical object at the position of the first receiving means and conveys it to the second receiving means. A method of inspecting the inner surface and the outer surface of the cylindrical object, characterized by imaging and inspecting the other surface of the outer surface or the inner surface of the cylindrical object at the position of the second receiving means.