JP3637028B2 - Cylindrical inner / outer surface inspection apparatus and inspection method - Google Patents

Description

[0001]
BACKGROUND 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 non-bottomed cylinder or a rectangular tube molded from plastic, and in particular, a bottomed cosmetic product molded from plastic, etc. The present invention relates to an inspection apparatus and inspection method suitable for inspecting the inner surface and outer surface of a cap of a container.
[0002]
[Prior art]
Conventionally, in order to inspect the molding state inside the molded product, the molded product that is molded with plastic is imaged on the conveyor belt during the process of assembling the molded product. The quality of a molded product is inspected by taking an image with a photographing camera and comparing it with a good image recorded in advance.
[0003]
In addition, the external appearance of the molded product has been visually inspected after the molded product is assembled into a product. According to this method, it is necessary to arrange an inspector, which requires labor costs, which not only increases the cost, but also causes an oversight of the inspection or a problem in accuracy.
[0004]
[Problems to be solved by the invention]
The present invention is intended to solve such problems, and an object of the present invention is to provide an inspection apparatus capable of automatically and accurately performing an inner surface and an outer surface of a cylindrical object in one inspection process.
[0005]
[Means for Solving the Problems]
According to the present invention, in 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 At least two holding means for respectively holding the outer peripheral surface of the cylindrical object at the first inspection position where the cylindrical object at the standby position is inverted, and the cylindrical shape disposed at the first inspection position and at the standby position A first receiving means for receiving and holding an object, a second receiving means for receiving a cylindrical object at the first inspection position and holding it at a second inspection position, and a cylindrical object at the standby position. First rotating means for reversing the two holding means together with the cylindrical object up to the receiving means and the cylindrical object in the first receiving means up to the second receiving means, and then returning to the original position; Said first receiving means; and 2 a second rotating means for rotating the receiving means on the central axis thereof, and at the first inspection position, the inner surface or one of the outer surfaces of the cylindrical object held by the first receiving means is also referred to as the second At the inspection position, it comprises at least one camera means for observing the outer surface or the other surface of the inner surface of the cylindrical object held by the second receiving means, and an image captured by the camera means and a reference By inspecting the inner and outer surfaces of the cylindrical object by comparing the images, the inner and outer surfaces of the cylindrical object are automatically and accurately inspected in one inspection process. It can be carried out.
[0006]
According to a second aspect of the present invention, the holding means includes a cylindrical object at the standby position, a cylindrical object at the first inspection position where the cylindrical object is inverted, and a cylindrical object at the first inspection position. Four holding means for respectively holding the outer peripheral surface of the cylindrical object at the second inspection position and the cylindrical object at the intermediate position where the cylindrical object at the second inspection position is inverted, and the first inspection position A first receiving means for receiving and holding the cylindrical object at the standby position; a second receiving means for receiving the cylindrical object at the first inspection position and holding it at the second inspection position; And a third receiving means for receiving the cylindrical object at the inspection position and holding the cylindrical object at the intermediate position. The cylindrical object at the standby position is transferred to the first receiving means to the first receiving means. A certain cylindrical object is in the second receiving means up to the second receiving means. The first rotation that simultaneously reverses the four holding means together with the cylindrical object up to the intermediate position and the cylindrical object at the intermediate position to the second conveying means, and then returns to the original position. The inspection apparatus according to claim 1, further comprising: means, so that the cylindrical object can be reliably conveyed to the next step in the same state as the first conveyed state. It is possible to easily interpose the inspection apparatus according to the present invention without significantly changing the transport process.
[0007]
According to a third aspect of the present invention, the camera means is formed into a cylindrical shape easily and reliably by using the inspection device according to the first or second aspect, which is disposed at the first inspection position and the second inspection position, respectively. The inner and outer surfaces of objects can be inspected.
[0008]
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, the holding means is reversed, and the cylindrical object is conveyed to the first receiving means. 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, and the second holding means is used to invert the cylindrical object at the position of the first receiving means to be second. A method for inspecting an inner surface and an outer surface of a cylindrical object characterized in that the outer surface of the cylindrical object or the other surface of the inner surface of the cylindrical object is imaged and inspected by the camera means at the position of the second receiving means. Thus, the inner surface and the outer surface of the cylindrical object can be automatically and reliably inspected.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an imaging apparatus of the present invention will be described with reference to the drawings.
[0010]
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 to be inspected by the inspection apparatus of the present invention. The cap 1 has a spherical bottom 2 on the upper surface and an opening 3 on the lower surface, and is molded of plastic. On the inner surface of the cap 1, there is a screw groove 4 screwed into a screw thread formed on the peripheral edge of the opening of the container (not shown), and a cylindrical protrusion which is in close contact with the upper edge of the opening of the container and prevents liquid leakage. Part 5 is formed.
[0011]
Since this kind of cosmetic container has a high-class feeling, the surface properties and color appearance of the outer surface of the cap 1 are important factors, and those with uneven color due to scratches or resin burns that are likely to occur during molding are not acceptable. It is necessary to exclude it as a non-defective product. Conventionally, such screening has been performed visually by an inspector, but since the diameter of the cap 1 is as small as several centimeters, it is easy to overlook scratches and color unevenness, and there are problems in terms of accuracy as well as labor costs. There was also a problem that costs increased with the soaring price.
[0012]
On the other hand, since the cap 1 has a cylindrical shape, the screw groove 4 formed on the inner surface and the protruding portion 5 at the back of the cap 1 open the opening 3 of the cap 1 on the transport belt as in the conventional inspection apparatus. If it is arranged upward and only the camera means is used to image from directly above the opening 3, the recesses in the screw grooves 4 and the protrusions 5 due to insufficient resin injection (short shot) in the screw grooves 4 and the protrusions 5 can be sufficiently obtained. The inspection could not be performed, and in particular, when a dent was generated in the protruding portion 5, a problem such as a liquid leak occurred.
[0013]
The present invention seeks to provide an inspection apparatus that can solve such problems.
[0014]
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 face plate 7 is shown.
[0015]
A molding cap 1 taken out from a molding apparatus (not shown) is conveyed into the inspection apparatus by the third conveyor belt 9 in a standing state with the bottom 2 facing up and the opening 3 facing down. The cap 1 is transferred to the receiving table 10 in the standing state, and is further transferred from the receiving table 10 to the first conveying belt 8 in the same state.
[0016]
In this way, the cap 1 conveyed by the first conveyor belt 8 is transferred from the first conveyor belt 8 to a predetermined position of the standby station 12 by the extrusion device 11, and in a standing state with the bottom 2 facing upward, The camera enters a standby state in which inspection by the camera means 13 is performed.
[0017]
The cap 1 in the standby state is held at its outer peripheral surface by the first holding means 15, and this holding means 15 is rotated 180 degrees with respect to the transport direction by the first rotating means 16 and the cap 1 is opened 3. Is turned upside down and transferred to the first receiving means 17. As will be described later, the cup 1 transferred to the first receiving means 17 is rotated almost once by the second rotating means 18 with the central axis of the receiving means 17 as the rotation axis. During this time, the inner surface of the cap 1 is imaged by the first camera means 13 and inspected for the presence or absence of short shots of the screw grooves 4 and the protrusions 5 of the cap 1 as compared with the reference image (first inspection step). ). When this first inspection step is completed, the first rotating means 16 is reversed 180 degrees in the reverse direction, and the first holding means 15 returns to the original standby position. Subsequently, the cap 1 held by the first receiving means 17 is held by the second holding means 19 and rotated by 180 degrees in the forward direction of the first rotating means 16, thereby raising the bottom 2 of the cap 1. Then, it is transferred to the second receiving means 20. The cap 1 received by the second receiving means 20 is rotated almost once by the second rotating means 18 with the central axis of the second receiving means 20 as the rotation axis, as will be described later. During this time, the outer surface of the cap 1 is picked up by the second camera means 14 and compared with a reference image, and the outer surface of the cap 1 is inspected for scratches and color unevenness (second inspection step). After the end of this inspection, the second holding means 19 is reversely rotated by the first rotating means 16 in the same manner as the first holding means 15 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 rotated 180 degrees in the same manner as the first and second holding means 15, 19. Be transported. In the third receiving means 22, the cap 1 is held with the opening 3 facing upward, and is transferred to the next second transport belt 24 in a standing state with the bottom 2 of the cap 1 facing upward. Intermediate position. In order to convey the cap 1 from the intermediate position to the second conveying belt, the cap 1 held by the third receiving means 22 at the intermediate position is held by the fourth holding means 23, and the first rotating means 16 performs the first rotation. 4 Reversing, that is, the bottom 2 is turned up, is transferred to the receiving station 25 by rotation of the holding means 23 by 180 degrees. The cap 1 transferred to the receiving station 25 is transferred to the second conveying belt 24 with the bottom 2 facing up, that is, in the same standing state conveyed by the first conveying belt 8.
[0018]
The cap 1 transferred to the receiving station 25 receives the result of the inspection in the first and second inspection steps, and the sorting means 30 and 31 operated by the electromagnetic plunger 29 or the like. It is transferred to the second conveyor belt 24 and then stored in the product stocker 27. On the other hand, the rejected ones are transferred to the waste outlet 26 on the left, and are collected in the storage box 32 and used as recycled plastic.
[0019]
2 and 3, reference numeral 28 denotes a monitor display for displaying the inner and outer surfaces of the cap 1 imaged by the first and second camera means 13 and 14.
[0020]
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 moved by the first rotating means 16 and the cap 1 is moved. Although it is sufficient to reversely transfer to the first receiving means 17 and the second receiving means 20, the cap 1 is reversed four times using the third holding means 21 and the fourth holding means 23, and the first conveying belt 8. If the cap 1 is transported to the second transport belt 24 in the same state as the transport state of the cap 1 in the case of transporting in the next step, the conventional manufacturing process can be easily performed without adding a step of inverting the cap 1 in the next step. This inspection process can be incorporated.
[0021]
In order to inspect the inner surface and the outer surface of the cap 1, at least one first camera means 13 may be arranged, and the camera means 13 may be moved between the first inspection process and the second inspection process. If the camera means is disposed in each of the first inspection process and the second inspection process, the inner surface and the outer surface of the cap 1 can be inspected at the same time, which enables a quick inspection, which is preferable.
[0022]
Further, in order to sufficiently inspect the inner surface and the outer surface of the cap 1, the first receiving means 17 and the second receiving means 20 are rotated almost once in the first inspection process and the second inspection process. It is necessary that the first and second camera means 13 and 14 image almost the entire outer surface. In this case, in order to sufficiently capture the inner and outer surfaces 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 inclined so as to be C degrees, for example 45 degrees. As shown in FIGS. 5 and 6, the tilt angle C and the field of view of these camera means 13 and 14 are the field of view range in which the first camera means 13 can image the screw groove 4 and the protrusion 5 on the inner surface of the cap 1. D1 and the outer surface 34 portion of the outer surface of the cap 1 that is not held by the first receiving means 17 are within the field-of-view range D2 to be imaged, and in the second camera means 14, the bottom 2 of the cap 1 It is set to be a visual field range D3 in which the side 34 portion 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 may be rotated substantially once by the receiving means 17 and 20 continuously by the second rotating means. However, depending on the field of view range, for example, the cap 1 may be rotated approximately once every 60 degrees. You can also. Thus, in the case of intermittent rotation, it is possible to pick up and inspect still images, respectively, and to inspect with higher accuracy.
[0023]
As the camera means 13 and 14, a CCD line image sensor is preferably used, and an image captured by the 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 and the resin burned portion on the outer surface of the cap 1 are indicated by white lines and areas, and when a short shot occurs in the screw groove 4 and the protruding portion 5 and a dent is generated. The indented portion is not displayed with a white continuous line, but is displayed with an intermittent white line, and it can be automatically detected that there is a defect.
[0024]
In the present invention, an area camera can also be used effectively instead of the CCD line image sensor. In the figure, reference numeral 33 denotes illumination 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.
[0025]
Next, an embodiment of the first and second rotating means 16 and 18 according to the present invention will be described with reference to FIGS.
7 is an enlarged plan view in which the combination 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, 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 away, and FIG. 9 is a side view seen from below cut out in the portion of the first receiving means 17 in FIG.
[0026]
As is apparent from FIGS. 7 and 9, the first to fourth holding means 15, 19, 21, and 23 include a holding portion 35 having an arcuate inner surface along the outer surface shape of the cap 1, and this holding portion. 35 is operated by air pressure, hydraulic pressure or the like and moves up and down (see FIG. 7) to grip or separate the outer surface 34 of the cap 1. These holding means are attached to one end of a lever 38 connected to a rotating shaft 39 rotated 180 degrees by a rack gear 36 and a pinion gear 37 which will be described later, and the cap 1 is attached by rotating the rotating shaft 39 180 degrees. The held holding means 15, 19, 21, 23 are reversed from the state of the cap 1 at the gripped position, that is, in the first holding means 13, the opening 2 is raised from the state in which the bottom 2 of the cap 1 is up. In this state, the cap 1 is transferred to the receiving means 17, 20, 22 and the receiving station 25. When the cap 1 is transferred to the receiving means 17, 20, 22, the holding means 15, 19, 21, 23 holding the cap 1 separates the cap 1, and then operates the rack gear 36 and the pinion gear 37. Thus, the rotating shaft 39 is reversely rotated, and only the holding means 15, 19, 21, and 23 are returned to their original positions. The holding portion 35 is operated again at the return position, the cap 1 is gripped and rotated, and the cap 1 is delivered to each receiving means 17, 20, 22 in the same manner as described above. Thereafter, the same operation is repeated, and the cap 1 is transferred to the receiving means 17, 20, 22 and the receiving station 25 while inverting the cap 1.
[0027]
Next, the operation of the rack gear 36 will be described with reference to FIGS.
The rack gear 36 is connected at one end to an electromagnetic plunger 40 and connected to a connecting plate 42 connected to two thrust shafts 41 at the center and a connecting plate 43 connected to the ends of the two thrust shafts 41. Has been. Therefore, as the electromagnetic plunger 40 moves up and down, the rack gear 36 also moves up and down. As the rack gear 36 moves up and down, the four pinion gears 37 engaged with the rack gear 36 rotate in synchronization with each other, and the pinion gears. The rotating shaft 39 to which the two are connected rotates, and with the rotation of the rotating shaft 39, the holding means 15, 19, 21, and 23 are simultaneously rotated and reversed 180 degrees. (See Figure 8)
Reference numeral 44 denotes a thrust bearing for the thrust shaft to operate smoothly, and is attached to the L-shaped substrate 45 by screws 46.
[0028]
An electromagnetic plunger 40 is also attached to the substrate 45 by a pinion gear 37 and an L-shaped mounting bracket 47.
[0029]
Next, the second rotating means for rotating the receiving means 17 and 20 will be described with reference to FIGS.
As shown in FIG. 5, the first and second receiving means 17 and 20 have two shapes depending on the situation of receiving and holding the cap 1, and the receiving means 17 and 22 are provided at the bottom 2 of the cap 1. In order to hold the cap 1, a spherical recess 48 and a hole 50 for fitting and attaching a mounting jig 49 of the second rotating means are provided in the center of the bottom surface. On the other hand, in the case of the second receiving means 20 that is held with the bottom 2 of the cap 1 facing upward, the upper receiving edge 20 of the cap 1 is almost the same as the opening edge of the cap 1 so that it can 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 the mounting jig 49 of the second rotating means 18 is fitted is formed at the bottom, like the first receiving means. (Refer to FIG. 6) The receiving means 17, 20, and 22 can take various shapes depending on the shape of the cylindrical object such as the cap 1 to be inspected, and are not limited to the above shapes.
[0030]
The first and second receiving means 17 and 20 rotate substantially once with the central axis E as the rotation axis, and are attached to the second rotating means 18 for such rotation. As shown in FIGS. 7 and 9, the second rotating means 18 has the mounting jig 49 attached to the upper part of the rotating shaft 53 held by the bearing bearing 55 attached to the L-shaped substrate 52. A pinion gear 54 is attached to the lower part of the rotating shaft 53.
[0031]
The pinion gear 54 meshes with the rack gear 57 connected to the electromagnetic plunger 56, 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). Accordingly, the pinion gear 54 is rotated. The rotation of the pinion gear 54 rotates the first and second receiving means 17 and 20 attached on the attachment jig 49 together with the attachment jig 49 attached on the rotation shaft.
[0032]
As in the case of the first rotating means 16 described above, the rack gear 57 is connected to both ends of the thrust shaft 60 held by the thrust bearing 61 and connecting plates 59, 66 connected to the shaft 58 of the electromagnetic plunger 56. 56. Accordingly, the operation of the electromagnetic plunger 56 causes the rack gear 57 to move up and down and accordingly the pinion gear 54 is rotated, so that the receiving means 17 and 20 can be easily rotated almost once.
[0033]
As described above, the first and second rotating means in the present invention are not necessarily required to use the rack gear and the pinion gear, and may use the rotating gear together with the electric motor. However, it is preferable to use a rack gear and a pinion gear because the rotation angle of the receiving means during the intermittent rotation operation can be controlled easily and accurately.
[0034]
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, and 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 mounted to be movable up and down by a gear 63, and the cap 1 transported by the third transport belt 9 is lowered to the position of the first transport belt 8 and is transported by the electromagnetic plunger 62 to the first transport. It is transferred to the belt 8. As described above, when the receiving table 10 is set to be movable up and down, even if the position of the third conveying belt fed from the molding apparatus is arranged upward as indicated by the dotted line, the receiving table 10 is It is preferable that after the cap 1 is received, the cap 1 is lowered to the position of the first conveyor belt and the cap 1 can be transferred to the first conveyor belt 8. In FIG. 10, reference numeral 68 denotes a stopper for restricting the rising of the receiving table 10.
[0035]
Further, as shown in FIG. 4, when storing the non-defective cap 1 after the inspection in the product stocker 27, in order to store as much cap 1 as possible, the cap 1 is placed on the back and front of the product stocker 27. The shooter 64 is arranged so as to drop, and the cap 1 is dropped into the back of the product stocker 27 along the slope of the shooter 64. When dropping the shooter 64 to the upper position indicated by the dotted line with the plunger 65, the cap 1 does not come into contact with the shooter 64 and falls directly from the conveyor belt 24 to drop it onto the front part of the product stocker 27. It is preferable to dispose such a shooter 64 since it is dropped on the front portion of 27.
[0036]
In addition, the cylindrical thing used by this invention is not restricted to the said cap 1, A bottomed or bottomless cylindrical shape and a rectangular tube shape may be sufficient.
[0037]
【The invention's effect】
According to the inspection apparatus of the first aspect of the present invention, at least 2 that holds the outer peripheral surface of the cylindrical object at the standby position and the cylindrical object at the first inspection position where the cylindrical object at the standby position is inverted. A plurality of holding means, a first receiving means that is disposed at the first inspection position and receives and holds the cylindrical object at the standby position; and a second inspection that receives the cylindrical object at the first inspection position; A second receiving means for holding in position; a cylindrical object in the standby position to the first receiving means; and a cylindrical object in the first receiving means to the second receiving means together with the cylindrical object A first rotating means for inverting the two holding means and then returning to the original position; a second rotating means for rotating the first receiving means and the second receiving means on a central axis thereof; and the first inspection. In position, the first receiver For observing the inner surface or one of the outer surfaces of the cylindrical object held by the means, and the other surface of the outer surface or the inner surface of the cylindrical object held by the second receiving means at the second inspection position. And inspecting the inner surface and the outer surface of the cylindrical object by comparing the image captured by the camera means with a reference image, so that the inner surface and the outer surface of the cylindrical object are inspected. Can be automatically and accurately in one inspection process.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view cut at the center of a cap to be inspected by an inspection apparatus of the present invention.
FIG. 2 is a plan view in a state where an upper plate 6 is removed.
FIG. 3 is a plan view showing a side surface from which the left side plate 7 of FIG. 2 is removed.
4 is a plan view showing a state in which the lower plate of FIG. 2 is removed. FIG.
FIG. 5 is a cross-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 cross-sectional view of the receiving means in which a cap held by the second receiving means used in the inspection apparatus of the present invention is partially cut away.
7 is an enlarged plan view in which a combination portion of a rack gear and a pinion gear in the first inspection step and the second inspection step in FIG. 2 is cut away.
8 is an enlarged view in which a thrust bearing portion of the first inspection step and the second inspection step in FIG. 3 is cut away.
9 is a side view of the first receiving means 17 of FIG.
10 is a plan view with the upper side plate of FIG. 2 removed. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cap 2 Bottom part 3 Opening 4 Screw groove 5 Projection part 8 1st conveyance belt 12 Standby station 13 1st camera means 14 2nd camera means 15 1st holding means 16 1st rotation means 17 1st receiving means 18 2nd rotation means 19 Second holding means 20 Second receiving means 21 Third holding means 22 Third receiving means 23 Fourth holding means 24 Second transport belt 35 Holding portion 36 Rack gear 37 Pinion gear 39 Rotating shaft 40 Electromagnetic plunger 48 Recess 49 Tool 53 Rotating shaft 54 Pinion gear 56 Rack gear

Claims (4)

In the inspection apparatus for inspecting the inner surface and the outer surface of the cylindrical object, a conveying means for conveying the cylindrical object to the inspection standby position, the cylindrical object at the standby position, and the cylindrical object at the standby position are inverted. At least two holding means for respectively holding the outer peripheral surface of the cylindrical object at one inspection position; and first receiving means for receiving and holding the cylindrical object arranged at the first inspection position and at the standby position; Second receiving means for receiving the cylindrical object at the first inspection position and holding it at the second inspection position; and the cylindrical object at the standby position up to the first receiving means and the cylinder in the first receiving means. The first rotating means for reversing the two holding means together with the cylindrical object up to the second receiving means and then returning to the original position, and the first receiving means and the second receiving means are Rotate on center axis A second rotating means for moving the inner surface or the outer surface of the cylindrical object held by the first receiving means at the first inspection position, and the second receiving means at the second inspection position. At least one camera unit for observing the outer surface or the other surface of the inner surface of the held cylindrical object, and comparing the image captured by the camera unit with a reference image. An inspection apparatus for inspecting an inner surface and an outer surface. The holding means includes a cylindrical object at the standby position, a cylindrical object at the first inspection position where the cylindrical object is inverted, and a cylinder at the second inspection position where the cylindrical object at the first inspection position is inverted. Four holding means for holding the outer peripheral surface of the cylindrical object at the intermediate position where the cylindrical object and the cylindrical object at the second inspection position are inverted, and the cylindrical member disposed at the first inspection position and in the standby position A first receiving means for receiving and holding an object; a second receiving means for receiving a cylindrical object at the first inspection position; and a second receiving means for holding at a second inspection position; and a cylindrical object at the second inspection position. A third receiving means for holding the cylindrical object at an intermediate position, the cylindrical object at the standby position to the first receiving means, and the cylindrical object at the first receiving means to the second receiving means. Until the cylinder in the second receiving means reaches the intermediate position and And a first rotating means for simultaneously reversing the four holding means together with the cylindrical object, and then returning the cylindrical object at the intermediate position to the second conveying means. The inspection device described. The inspection apparatus according to claim 1 or 2, wherein the camera means is disposed at a first inspection position and a second inspection position, respectively. The cylindrical object conveyed in the standing state is held by the holding means in the standing state, the holding means is reversed, and the cylindrical object is conveyed to the first receiving means, and is cylindrical at the position of the first receiving means. One of the inner surface and the outer surface of the object is imaged and inspected by the camera means, and the second holding means reverses the cylindrical object at the position of the first receiving means and conveys it to the second receiving means to receive the second receiving A method for inspecting an inner surface and an outer surface of a cylindrical object, wherein the other surface of the outer surface or the inner surface of the cylindrical object is imaged and inspected by camera means at the position of the means.

Images