JPH08240539A - Surface inspection device - Google Patents

Abstract

PURPOSE: To provide a surface inspection device with an inspection capacity corresponding to the difference in manufacturing capacity for each type of a container to be inspected such as a work bottle. CONSTITUTION: An inclination cam KN engaged with one edge of an auxiliary arm 23 for retaining an image pick-up device T for picking up the image of the surface of a work bottle B has a cross section in the shape of a triangle with a height corresponding to the maximum-height part in a range to be inspected in the highest work bottle B at an inspection starting position in a rotary-type surface inspection device S1 for inspecting the surface of the work bottle B which travels on a circular track. An inclination angle α is decreased between an inspection starting position and an inspection ending position. Then, a stage cam with a plurality of groove-shaped guide parts guiding the rotary movement and up/down movement of the auxiliary arm 23 is provided and the height of each guide part is continuously decreased between the inspection starting position and the inspection ending position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface inspection apparatus used in a so-called manufacturing line, and more particularly to a surface inspection apparatus for visualizing and inspecting the surface of a container to be inspected having an opening such as a bottle or a can. Regarding

[0002]

2. Description of the Related Art Conventionally, when a container or the like used for enclosing a liquid or the like is manufactured, an inspection process for selecting only non-defective products from completed containers is required in the final process of the manufacturing line. . This inspection process has been performed on the completed container for contamination of foreign matter, damage to the container, and the like during manufacturing. In this inspection, large ones can be visually inspected, but if it is impossible to rely on human ability due to the large number of containers and other products produced, surface inspection by image processing should be performed. Become.

Conventionally, the surface inspection by this image processing has been performed by a so-called rotary surface inspection apparatus 100 shown in FIG. This rotary type surface inspection device 100
Is a surface inspection device capable of inspecting a large number of containers to be inspected without stopping the flow of the manufacturing line, although it is necessary to control the rotating operation of the rotating table or the like and the operation of each imaging device.

In the rotary type surface inspection apparatus 100, the completed container B to be inspected, which has been conveyed by the conveyer H, is transferred to the rotary table 102 by the inlet star wheel 101, and the surface of the container is rotated during rotation by the rotary table 102. The inspection is done. Then, the container B to be inspected for which the surface inspection has been completed is transferred again to the transfer conveyor H by the exit star wheel 103, and is processed in the next stage such as packing. This inspection was normally performed while the container was passing by an inspection camera that was fixed separately from the turntable 100.

However, recently, a new inspection method developed by the inventors has been implemented. Surface inspection by this method,
More specifically, first, an imaging device including an inspection camera, a light source, and the like is inserted into each of the transferred containers B to be inspected from the opening of the container B to be inspected. next,
With the movement of the container B to be inspected due to the rotation of the turntable 102,
By reciprocating the image pickup device up and down, the surface such as the inner surface of the container B to be inspected is inspected. At this time, since the container B to be inspected also rotates by the rotation of the rotating table 102, the entire inner surface of the container B to be inspected can be inspected in conjunction with the reciprocating motion of the imaging device. The image of the surface imaged by the imaging device is transmitted to the image processing unit as a video signal, and known image processing such as binarization and differentiation is performed in the image processing unit to detect foreign matter on the surface. It The detection of these foreign substances utilizes the fact that if there is a foreign substance on a uniform surface, the illumination light from the light source is diffused and reflected, so that a difference in luminance occurs in the image signal. The presence or absence of a foreign substance or the like is determined by image-processing the video signal including the difference in brightness.

[0006]

However, in the rotary type surface inspection apparatus according to the same method, the range (moving distance) of the reciprocating (up and down) operation of the image pickup apparatus is fixed, and the containers B to be inspected having different heights are fixed. Since the range of the reciprocating (up and down) operation of the image pickup device cannot be made variable in response to the above, the efficiency of the entire production line may be poor in the production of multi-product containers having different heights.

More specifically, for example, P _B shown in FIG.
Suppose that the surface inspection of the container B to be inspected is performed in the range from P _D to P _D , and the image pickup device performs the surface inspection while descending in the range of 400 mm during this period, the image pickup device is
Will make a 400 mm descending motion while moving 180 degrees from P _B to P _D. In this case, when the height of the inspected vessel B is 400mm, since the moving range of the height and the imaging device of the inspection container B match, as shown in FIG. 9 (a), P from P _B Effective surface inspection can be performed in the entire 180 degree range of _D. On the other hand, for example, when the height of the container B to be inspected is 300 mm, as shown in FIG.
As shown in (b), 100
Since mm does not have an inspection target, surface inspection cannot be performed. Similarly, when the height of the container B to be inspected is 200 mm, as shown in FIG. 9C, 200 mm immediately after the start of the descent of the image pickup device, there is no inspection object, and thus the surface inspection cannot be performed. .

As described above, when the height of the container B to be inspected changes, although there is a range in which the surface inspection cannot be performed in the moving range of the image pickup device, FIG.
In both cases (b) and (c), since the time to move 180 degrees is constant, the time is only to descend without surface inspection (in the case of FIG. 9 (b), it is within the range of movement up to 100 mm). The corresponding time is 200 in the case of FIG. 9C.
mm, which is the time corresponding to the range of movement until it descends). That is, even if the height of the container B to be inspected changes and the area to be surface-inspected decreases, the time required for the inspection process (the time during which the container B to be inspected is mounted on the rotary table 102) does not change. .

When viewed from the whole production line, for example, as shown in FIG. 10, when an inspected container B having different heights is produced from a certain amount of material (glass, plastic, etc.), the object to be inspected is different. If the diameter of the inspection container B is constant,
The lower the height, the larger the manufacturing capacity (the number of products manufactured per unit time), and at the same time, the surface area to be inspected is reduced, and the inspection time per inspected container B should be reduced. Since it is constant, the time required for the inspection process remains unchanged.

Therefore, as a result, the inspection capacity does not reach the manufacturing capacity as in the case of B or C in FIG. 10, the container B to be inspected is delayed in the inspection step, and the time required for the inspection step causes Since the manufacturing capacity is determined, the manufacturing capacity of the entire container including the inspection process becomes constant despite the increased manufacturing capacity of the container B to be inspected.

In view of the above problems, the present invention has an object to provide a surface inspection apparatus having an inspection ability corresponding to a difference in manufacturing ability for each type of container to be inspected.

[0012]

In order to solve the above problems, the invention according to claim 1 is a surface inspection apparatus for inspecting the surface of an object to be inspected such as a work bottle moving on a circular orbit, A holding member such as an inclined cam provided concentrically with the circular orbit, and a holding member held by the holding member, can move a distance corresponding to an inspection range of the inspection object in the inspection direction of the inspection object. An auxiliary arm rotatable concentrically with the circular orbit in synchronization with the object to be inspected, an imaging device provided on the auxiliary arm for imaging the surface of the object to be inspected, such as a borescope, and the holding An inclined portion such as an inclined cam formed on a member for guiding the rotation of the auxiliary arm and the movement of the object to be inspected in the inspection direction, and the inclined portion corresponding to the moving distance of the auxiliary arm in the inspection direction of the object to be inspected. Imaging of the imaging device The number of images to be photographed is switched, and the moving speed switching unit is arranged to switch the moving speed of the inspected object on the circular orbit in accordance with the inspection distance of the inspected object. The position on the inclined portion with which the auxiliary arm engages is selected in a timely manner in accordance with the inspection range.

According to a second aspect of the present invention, in the surface inspection apparatus according to the first aspect, the holding member having the inclined portion has a radial cross section at an inspection start position on the circular orbit, It has a height corresponding to the height of the highest part of the range to be inspected in the object to be inspected, and one side thereof is a substantially triangle forming the inclined part, and is perpendicular to the inclined part and the inspection direction. The inclination angle formed by the flat surface continuously decreases between the inspection start position and the inspection end position on the circular orbit, and the inclination angle at the inspection end position should be inspected on the object to be inspected. It is configured to correspond to the height of the bottom of the range.

According to a third aspect of the present invention, in the surface inspection apparatus according to the first aspect, the holding member on which the inclined portion is formed has a radial cross section at an inspection start position on the circular orbit. The inclination angle formed by the inclined portion and the surface perpendicular to the inspection direction corresponds to the height of the lowermost part of the range to be inspected in the inspection object, and the inclination angle is the circular shape from the inspection start position. It continuously increases between the inspection end positions on the orbit, and further, the radial cross section at the inspection end position has a height corresponding to the height of the highest part of the range to be inspected in the inspected object. It is configured such that one side thereof has a substantially triangular shape forming the inclined portion.

According to a fourth aspect of the present invention, in a surface inspection device for inspecting the surface of a cylindrical inspection object such as a work bottle moving on a circular orbit, a cam or the like provided concentrically with the circular orbit. A holding member, which is held by the holding member, can move a distance corresponding to an inspection range of the inspection object with respect to the inspection direction of the inspection object, and is synchronized with the inspection object concentrically with the circular trajectory. And an expandable and retractable auxiliary arm, an imaging device such as a borescope that is provided on the auxiliary arm and visualizes the surface of the object to be inspected, and the holding member, At least two guide parts such as cams for guiding the movement of the inspection object in the inspection direction, and an image capturing method for switching the number of images captured by the imaging device according to the moving distance of the auxiliary arm in the inspection direction of the inspection object. A number switching means, a moving speed switching means, wherein in response to the test distance of the inspection direction of the inspection object to switch the moving velocity of the circular path of the object to be inspected,
It is configured such that the guide portion with which the auxiliary arm engages is selected in a timely manner in accordance with the inspection range of the inspection object.

According to a fifth aspect of the present invention, in the surface inspection apparatus according to the fourth aspect, at least two of the guide portions have the height in the inspection direction at the inspection start position on the circular orbit. The guide parts are different from each other in correspondence with the height of the highest part of the range to be inspected in the object to be inspected, and continuously decrease between the inspection start position and the inspection end position on the circular orbit, and At the inspection end position, the height corresponds to the height of the lowermost part of the range to be inspected in the inspected body.

According to a sixth aspect of the present invention, in the surface inspection apparatus according to the fourth aspect, at least two of the guide portions have heights in the inspection direction at the inspection start position on the circular orbit. It has a height corresponding to the height of the lowermost part of the range to be inspected in the inspected object, increases continuously between the inspection start position and the inspection end position on the circular orbit, and further, the inspection end At each position, the guide portions are configured to be different depending on the height of the highest part of the range to be inspected in the object to be inspected.

[0018]

According to the first aspect of the invention, the holding member formed with the inclined portion is provided concentrically with the circular orbit, and guides the rotation of the auxiliary arm and the movement of the object to be inspected in the inspection direction.

When inspecting an object to be inspected, the height of the image pickup device at a predetermined inspection start position on a circular orbit corresponds to the inspection range of the object to be inspected. The position of the inclined portion with which the auxiliary arm engages is selected by expanding or contracting or replacing the auxiliary arm so that the height becomes the starting height.

In parallel with this, the number-of-photographed image switching means switches the number of imaged images of the image pickup device in accordance with the moving distance of the object to be inspected of the auxiliary arm in the inspection direction (vertical direction). Furthermore, the moving speed switching means allows the actual inspection to be started at the same inspection start position on the circular orbit and the inspection to be ended at the same inspection end position even when the height of the inspection object is different. The moving speed on the circular orbit of the inspection object is switched according to the inspection distance of the inspection object in the inspection direction.

The above-mentioned number-of-images switching means and the moving speed switching means may be manually switched by the user according to the inspection distance in the inspection direction of the inspection object, or the inspection direction of the inspection object may be changed. The distance may be detected and automatically switched.

Due to the operation of each of the above-mentioned parts, in the case of an object to be inspected having a low height (an area to be inspected having a narrow inspection range) (an object to be inspected having a high manufacturing capacity), the image pickup means of The movement distance of the inspection direction and the number of images to be taken can be reduced to increase the moving speed of the inspection object, and the inspection time can be shortened corresponding to the manufacturing capacity of the inspection object.

According to the invention of claim 2, claim 1
In addition to the function of the invention described in (1), the holding member having the inclined portion has a radial cross section at the inspection start position on the circular orbit that corresponds to the height of the highest part of the range to be inspected in the inspection object. It is a substantially triangular shape that has an inclined height and one side forms an inclined portion, and the inclination angle formed by the inclined portion and a plane perpendicular to the inspection direction is from the inspection start position to the inspection end position on the circular orbit. The angle of inclination at the inspection end position corresponds to the height of the lowermost part of the range to be inspected in the object to be inspected.

Here, the height of the apex of the triangle, which is the radial cross section at the inspection start position, corresponds to the height of the highest part of the range to be inspected in the inspection object having the highest height, The height of the bottom side corresponds to the height of the highest part of the range to be inspected in the inspected object having the lowest height.

Therefore, since the height of the image pickup device at the inspection start position on the circular orbit can be continuously and freely set by expanding or contracting the auxiliary arm or the like, it is possible to cope with inspected objects of various kinds of heights. Thus, the moving distance of the image pickup apparatus can be shortened and the inspection time can be shortened.

According to the invention of claim 3, claim 1
In addition to the effect of the invention described in (1), the holding member having the inclined portion has a tilt angle formed by the inclined portion and the surface perpendicular to the inspection direction in the radial cross section at the inspection start position on the circular trajectory, Corresponding to the height of the lowest part of the range to be inspected in the inspection body, the inclination angle continuously increases from the inspection start position to the inspection end position on the circular orbit,
Further, the cross section in the radial direction at the inspection end position has a height corresponding to the height of the highest part of the range to be inspected in the object to be inspected, and one side thereof is a substantially triangular shape forming an inclined portion. .

Here, the height of the apex of the triangle which is the radial cross section at the inspection end position corresponds to the height of the highest part of the range to be inspected in the inspection object having the highest height, The height of the bottom side corresponds to the height of the highest part of the range to be inspected in the inspected object having the lowest height.

Therefore, since the height of the image pickup device at the inspection end position on the circular orbit can be continuously and freely set by expanding or contracting the auxiliary arm, it is possible to cope with inspected objects of various kinds of heights. Thus, the moving distance of the image pickup apparatus can be shortened and the inspection time can be shortened.

According to the invention described in claim 4, the holding member provided with the guide portion is provided concentrically with the circular orbit, and guides the rotation of the auxiliary arm and the movement of the object to be inspected in the inspection direction.

When inspecting an object to be inspected, the height of the image pickup device at a predetermined inspection start position on a circular orbit corresponds to the inspection range of the object to be inspected. The guide portion with which the auxiliary arm engages is selected by expanding or contracting or exchanging the auxiliary arm so that the starting height is reached.

In parallel with this, the number-of-photographed image switching means switches the number of imaged images of the image pickup device in accordance with the moving distance of the object to be inspected of the auxiliary arm in the inspection direction (vertical direction). Further, the moving speed switching means starts the actual inspection at the same inspection start position on the circular trajectory and ends the inspection at the same inspection end position even when the height of the inspection object is different. First, the moving speed on the circular orbit of the inspection object is switched according to the inspection distance of the inspection object in the inspection direction.

It should be noted that the user may manually switch the above-mentioned number-of-photographs switching means and the moving speed switching means according to the inspection distance of the inspection object in the inspection direction, or the inspection of the inspection object in the inspection direction. The distance may be detected and automatically switched.

Due to the action of each of the above-mentioned parts, in the case of an object to be inspected having a low height (an area to be inspected having a narrow inspection range) (an object to be inspected having a high manufacturing capacity), the imaging means of The moving distance and the number of captured images can be reduced to increase the moving speed of the object to be inspected, and the inspection time can be shortened corresponding to the manufacturing capacity of the object to be inspected.

According to the invention of claim 5, claim 4
In addition to the operation of the invention described in (1), at least two guide portions have heights in the inspection direction corresponding to the height of the highest portion of the range to be inspected in the inspection object at the inspection start position on the circular orbit. Each guide part is different,
It continuously decreases from the inspection start position to the inspection end position on the circular orbit, and further corresponds to the height of the lowest part of the range to be inspected in the inspection object at the inspection end position.

Here, of the heights of the guide portions at the inspection start position, the height of the highest guide portion corresponds to the height of the highest portion of the range to be inspected in the inspection object having the highest height. The height of the lowest guide portion corresponds to the height of the highest portion of the range to be inspected in the inspection object having the lowest height.

Therefore, the height of the image pickup device at the inspection start position on the circular orbit can be set in correspondence with the height of the range to be inspected in the object to be inspected by expanding or contracting the auxiliary arm or the like. It is possible to shorten the moving distance of the image pickup apparatus and shorten the inspection time according to the height of the object to be inspected.

According to the invention of claim 6, claim 4
In addition to the function of the invention described in (1), at least two guide portions have a height in the inspection direction corresponding to the height of the lowest part of the range to be inspected in the inspection object at the inspection start position on the circular orbit. It has a height and increases continuously from the inspection start position to the inspection end position on the circular orbit, and at the inspection end position it corresponds to the height of the highest part of the range to be inspected in the inspected object. Each guide part is different.

Here, of the heights of the guide portions at the inspection end position, the height of the highest guide portion corresponds to the height of the highest portion of the range to be inspected in the inspection object having the highest height. The height of the lowest guide portion corresponds to the height of the highest portion of the range to be inspected in the inspection object having the lowest height.

Therefore, since the height of the image pickup device at the inspection end position can be set in correspondence with the height of the range to be inspected on the object to be inspected by expanding or contracting or replacing the auxiliary arm, the object having various heights can be covered. It is possible to shorten the moving distance of the image pickup device corresponding to the inspection object and shorten the inspection time.

[0040]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the present invention will be described with reference to the drawings. (I) Overall Configuration First, the overall configuration of a rotary type surface inspection apparatus as a surface inspection apparatus according to each of the following embodiments will be described with reference to FIG.

As shown in FIG. 1, the rotary type surface inspection apparatus S according to the embodiment has a conveyor 10 for conveying a manufactured work bottle B as an object to be inspected, and a conveyance speed of the conveyor 10 to be described later. The work bottle B conveyed is synchronized with the rotation speed of the rotation inspection table 15 to rotate the rotation inspection table 1.
A rotation (not shown) capable of rotating the inlet star wheel 11 transferred to 5 and a rotation inspection table 15 described later, and changing the rotation speed by a rotation speed switching device R as a moving speed switching means operated by a user. Base 13 with built-in motor and fixed base cam 12
And a rotation inspection table 15 for transporting the work bottle B on a circular orbit centered on the column 14, and a cam follower 16 at one end.
Is provided, and the base cam 12 is rotated along with the rotation of the rotation inspection table 15.
A shaft 17 for mounting the work bottle B on the rotation inspection table 15 by moving up and down along the rotation inspection table 15;
The rotation inspection table 15 is fixed vertically to the guide bar 18 that guides the vertical movement of the bottle motor 19 and the imaging device T, which will be described later, and the rotation inspection table 15 by moving up and down along with the rotation of the rotation inspection table 15. A bottle motor 19 for gripping the work bottle B transferred above and rotating the work bottle B itself, a borescope 20 inserted into the work bottle B, and a CCD (Charge Coupled Device) camera 21.
And an auxiliary arm 23 connecting the image pickup device T and the cam K in order to move the image pickup device T including the light 22 up and down along a cam K which will be described later. Along with this, the cam K as a circular holding member centering on the column 14 that guides the rotation and vertical movement of the auxiliary arm 22 and the guide bar 18 support the imaging device T and the bottle motor 19, and the rotation inspection table 15 rotates. A turntable 24 that rotates around the column 14 in synchronization with
A camera selector 25 that concentrates inspection images from a plurality of CCD cameras 21 and selects an image signal, a modulator 26A that modulates the image signals of the inspection images, a mixer 26B that mixes these modulated signals, and a work bottle. A shot number switching device 27 as a shot number switching unit operated by a user to switch the shot number for inspection in one imaging device T according to the height of B, and a modulation signal from the rotating mixer 26B. To the fixed demodulation unit 30A, an image processing unit 30B that detects a defective work bottle B based on the demodulated video signal, and the entire rotary surface inspection apparatus S is controlled. And a control unit 29 that operates.

Actually, the rotary type surface inspection apparatus S shown in FIG. 1 has, in addition to the above-mentioned configuration, a conveyer conveyor for transferring the work bottle B whose surface inspection has been completed to the next step such as packing. And work bottle B whose surface inspection has been completed
1 is provided with an exit star wheel or the like for transferring the sheet from the rotation inspection table 15 to the transport conveyor, but is not shown in FIG. 1 for the sake of simplification of description.

Next, the outline of the operation will be described. The work bottle B transported by the transport conveyor 10 is synchronized with the rotation speed of the rotation inspection table 15 by the entrance star wheel 11, and is moved to a predetermined position of the rotation inspection table 15 by the lowering operation of the shaft 17 along the base cam 12. Placed.

In parallel with this, the bottle motor 19 descends along the guide bar 18 to grip the work bottle B and rotate (spin) it. At this time, the rotation inspection table 1
Since 5 rotates around the column 14, the work bottle B also rotates (revolves) around the column 14 while rotating. The revolution speed of the work bottle B is changed according to the distance of the inspection range of the work bottle B by the user operating the rotation speed switching device R.

Next, when the work bottle B starts to rotate, the image pickup device T is lowered by the descending operation of the auxiliary arm 23 along the cam K, and the borescope 20 moves the work bottle B.
And the surface (inner surface) inspection of the work bottle B is started. At this time, the imaging device T descends along the cam K and the work bottle B rotates, so that the entire surface (inner surface) of the work bottle B is inspected. Further, in this inspection, the work bottle B is about half a circle (180 degrees) around the column 14.
°) Completed during rotation. Further, the number of shots for inspection in one imaging device T can be switched according to the distance of the inspection range in the work bottle B by the user switching the shot number switching device 27.

The inspection image from each image pickup device T is transmitted to the demodulation unit 30A and the image processing unit 30B via the camera selector 25, the modulation unit 26A, the mixer 26B and the antenna 28, and foreign matter on the surface of the work bottle B is removed. It is detected, and based on this, the work bottle B as a defective product is discharged by an external discharging device after the surface inspection is completed.

In the above-described structure and each of the following embodiments, the user operates the rotation speed switching device R and the shooting number switching device 27 for the revolution speed of the work bottle B and the number of shooting images of the imaging device T, respectively. However, the present invention is not limited to this, and the distance may be automatically changed by detecting the distance of the inspection range of the work bottle B. (II) First Embodiment Next, a first embodiment corresponding to the invention described in claims 1 to 3 will be described with reference to FIGS. 1 to 4.

_First , the structure of the rotary type surface inspection apparatus S ₁ of the first embodiment will be described with reference to FIG. Note that, in FIG. 2, for simplification of description, only a portion related to one imaging device T is shown.

In the first embodiment, the cam K in FIG. 1 is an inclined cam KN whose cross-sectional shape is a right triangle, as indicated by the symbol KN in FIG. Then, the auxiliary arm 23 is held on one side (oblique side) of the triangle as the inclined portion.

Next, the relationship between the sectional shape of the inclined cam KN and the inspection position on the rotation inspection table 15 will be described with reference to FIGS. 2 and 3. In FIG. 3, the actual surface inspection is performed while the work bottle B moves from the position P _{B to} the position P _D in FIG.

As shown in FIG. 3, in the cross section of the inclined cam KN, the inclination of the inclined portion is steepest at the position of the inspection start position P _B , and at the position of the inspection end P _D. The slope is horizontal. Then, between the position of the symbol P _{B and} the position of the symbol P _D , the inclination angle (the symbol α in FIG. 3) decreases monotonously and continuously, and the symbol P _D
It is made to be zero at the position of. However, the code P
The value of the inclination angle α at the position _D is set to zero in the present embodiment, but the value is not limited to this, and corresponds to the height of the bottom of the range to be inspected in the work bottle B of each height. If you have.

During the inspection, the user switches the length of the auxiliary arm 23 in accordance with the height of the range to be inspected in the work bottle B to be inspected, and corresponds to the inclined portion of the inclined cam KN. The position (see reference numeral a, b or c in FIG. 2 or 3) is engaged. Then, as the rotation inspection table 15 rotates, the auxiliary arm 23 rotates about the column 14 along the engaged position (see reference numeral a, b or c in FIG. 2 or FIG. 3) on the inclined portion of the inclined cam KN. While moving, it descends and inspection is performed.

More specifically, for example, in the case of inspecting a work bottle B having a high height (a long moving distance in the inspection direction (vertical direction) of the image pickup device T), reference numeral c in FIG. 2 or 3 is used.
The auxiliary arm 23 is engaged at the position of, and as the rotation inspection table 15 rotates, the auxiliary arm 23 moves downward on the position of the reference numeral c on the inclined portion of the inclined cam KN while rotating around the support column 14, and descends to perform the inspection. . Further, when inspecting the work bottle B having a low height (the moving distance of the imaging device T in the inspection direction (vertical direction) is short), the auxiliary arm 23 is engaged at the position indicated by symbol a in FIG. 2 or 3. Similarly, the inspection is performed by moving down on the position of the symbol a on the inclined portion of the inclined cam KN while rotating around the column 14. At this time, the guide bar 18 turns the rotation inspection table 15
Also, since the length of the auxiliary arm 23 is fixed during the inspection while being fixed to the turntable 24, for example, the auxiliary arm 2
Even when 3 is engaged in position c, it does not slide down the ramp during the inspection and moves over position c.

Here, the height of the upper surface of the inclined cam KN from the rotary inspection table at the position P _D in FIG. 3 is the height from the rotary inspection table 15 at the lower end of the borescope 20 at the end of the inspection (work bottle). It is constant regardless of the height of the area to be inspected in B).
Is set so as not to contact the bottom of the inner surface of the work bottle B.

Further, the magnitude of the inclination angle α at the inspection start position (reference symbol P _{B in} FIG. 3) is determined by the auxiliary arm 23 in the inspection direction (vertical direction) from the inspection start position to the inspection end position.
Are set so as to correspond to the distances to be inspected in the respective work bottles B (having different heights). More specifically, for example, when inspecting a high work bottle B, the inspection direction of the auxiliary arm 23 (up and down direction) accompanying the rotation at the position of the reference sign c on the inclined cam KN of FIG. 2 or FIG. ) (The movement distance in the inspection direction (vertical direction) from the inspection start position to the inspection end position) is set to be equal to the inspection distance of the work bottle B to be inspected.

Next, between the position P _D in FIG. 3 and the position P _E which is the discharge position of the work bottle B, the imaging device T is lifted in order to take out the borescope 20 from the work bottle B. Therefore, the inclination angle α of the inclination cam KN is gradually increased so that the borescope 20 is completely removed from the work bottle B at the position P _E. Then, at the position P _E , the work bottle B is transferred to the outlet star wheel 40 and discharged.

After the work bottle B is discharged, the portion between the position P _E in FIG. 3 and the position P _B in FIG. 3 is prepared for the work bottle B to be subsequently introduced into the rotary surface inspection apparatus S _1. The size of the tilt angle α of the tilt cam KN does not change in order to keep the height of the image pickup device T at the position of the position P _E in FIG.

Next, the engagement position between the inclined cam KN and the auxiliary arm 23 and the locus of movement of the auxiliary arm 23 due to the rotation of the rotation inspection table 15 in the first embodiment will be described with reference to FIG. The reference numeral P _A to P _E and code P _O in FIG. 4, reference numeral P _A to P _E and code P _O in FIG. 3
It corresponds to.

As shown in FIG. 4, when the auxiliary arm 23 is engaged with the position of the symbol c on the inclined cam KN, the inspection direction (up and down) of the image pickup device T is corresponding to the work bottle B having a high height. The moving distance of (direction) is the largest. Further, when the auxiliary arm 23 is engaged at the position indicated by the symbol a, the moving distance of the image pickup device T is reduced corresponding to the work bottle B having a low height. At this time, the auxiliary arm 2
Since the length of 3 can be arbitrarily set, the movement distance of the auxiliary arm 23 in the inspection direction can be arbitrarily set within the range where the tilt cam KN can be held, and the work bottle having an arbitrary height within the range where the tilt cam KN can be held. Surface inspection can be performed corresponding to B.

Further, as shown in FIG. 4, in the rotary type surface inspection apparatus S ₁ of the first embodiment, the image pickup apparatus T corresponding to the height of the work bottle B to be inspected.
Since the moving distance in the inspection direction and the number of captured images are switched (the higher the height of the work bottle B, the more the number of captured images is set), the height of the work bottle B to be inspected is limited. Instead, the effective inspection area is between P _B and P _D in FIG. Therefore, when the height of the work bottle B is low and the number of images to be photographed is small, the rotation speed of the rotation inspection table 15 can be increased by operating the rotation speed switching device R, and the inspection time can be shortened. .

As described above, according to the rotary type surface inspection apparatus S ₁ of the first embodiment, the cam K with which the auxiliary arm 23 engages is the inclined cam KN, and its inclination angle α is monotonic and within the inspection range. The movement distance of the image pickup device T can be switched according to the height of the range to be inspected in the work bottle B so as to decrease continuously.
Furthermore, the imaging device T for one type of work bottle B corresponding to the height of the range to be inspected in the work bottle B.
Since the number of images to be photographed and the rotation speed of the rotation inspection table 15 are switched, in the case of the work bottle B having a low height (the work bottle B having a high manufacturing capacity), the work bottle B is higher than the work bottle B having a high height. The revolution (movement) speed of the bottle B can be increased, and the inspection time can be shortened corresponding to the manufacturing capacity of the work bottle B.

In the first embodiment described above, the surface inspection is performed while the image pickup device T descends, but the invention is not limited to this, and the inspection start position P _B to the inspection end position P _D are not limited thereto. In the meantime, the inclination angle α may be increased monotonously and continuously, and the surface inspection may be performed while the imaging device T is moving upward. In this case, the work bottle B is placed on the rotation inspection table 15 and the bottle motor 19
After being gripped by, the borescope 20 once descends to the lowest point of the range to be inspected in the work bottle B, and then the inspection is started. (III) Second Embodiment Next, a second embodiment corresponding to the invention described in claims 4 to 6 will be described with reference to FIGS. 5 to 7.

In the above-described first embodiment, the cam K in FIG. 1 is the inclined cam KN having the inclined portion with the inclination angle α, but in the second embodiment, the three guide portions 50 are provided.
And a stepped cam KD having 52 to 52.

Further, in FIGS. 5 to 7, the same members and the like as those in the first embodiment are designated by the same reference numerals, and the detailed description thereof will be omitted. First, the configuration of the rotary surface inspection apparatus S ₂ of the second embodiment will be described with reference to FIG.

In the second embodiment, the step cam KD shown in FIG.
The auxiliary arm 23 is engaged with any one of the upper guide portions 50 to 52. Next, the relationship between the sectional shape of the step cam KD and the inspection position on the rotation inspection table 15 will be described with reference to FIGS. 5 and 6.

As shown in FIG. 6, the cross section of the step cam KD is
The height of each of the guide portions 50 to 52 from the rotary inspection table 15 is the highest at the position of the reference P _B which is the inspection start position, and the lowest at the position of the reference P _D which is the inspection end position. Then, the height of each of the guide portions 50 to 52 is monotonously and continuously reduced between the position of the symbol P _{B and} the position of the symbol P _D. Further, at the position P _D , the heights of the respective guide parts 50 to 52 are the same. However, although the heights of the respective guide portions 50 to 52 at the position of the symbol P _D are the same in the present embodiment, the heights are not limited to this, and are within the range to be inspected in the work bottle B of each height. It only has to correspond to the height of the bottom.

During the inspection, the user switches the length of the auxiliary arm 23 according to the height of the range to be inspected in the work bottle B to be inspected, and the corresponding guide portion on the step cam KD. It is engaged with the guide portion of any one of 50, 51 or 52. Then, along with the guide portion 50, 51, or 52 engaged with the rotation of the rotation inspection table 15, the auxiliary arm 23 descends while being rotationally moved around the column 14, and the inspection is performed.

More specifically, for example, when inspecting a work bottle B having a high height, the auxiliary arm 23 is engaged with the guide portion 52, and the guide portion 52 moves on the guide portion 52 as the rotation inspection table 15 rotates. The inspection is performed while descending while rotating around the column 14. Also, work bottle B with a low height
In the case of inspecting, the auxiliary arm 23 is engaged with the guide portion 50, and similarly, the support 1 is placed on the guide portion 50 of the step cam KD.
While rotating around 4, it descends and an inspection is performed.
Here, the heights of the guide parts 50 to 52 from the rotation inspection table at the position P _D in FIG. 6 are the same as in the first embodiment.
The lower end of the borescope 20 corresponds to the height of the lower end of the borescope 20 from the rotating inspection table 15 at the end of the inspection (regardless of the height of the range to be inspected in the work bottle B). It is set so as not to contact the bottom of the inner surface of the bottle B. Further, the rotation inspection table 1 of each of the guide portions 50 to 52 at the inspection start position (reference numeral P _{B in} FIG. 6).
The height from 5 is such that the movement distance of the auxiliary arm 23 in the inspection direction (vertical direction) from the inspection start position to the inspection end position corresponds to the distance to be inspected in each work bottle B (having a different height). Is set to. More specifically, for example, when inspecting a work bottle B having a high height, a movement distance (from the inspection start position to the inspection start position) of the auxiliary arm 23 in the inspection direction (vertical direction) accompanying the rotation at the position of the guide portion 52. The moving distance in the inspection direction (vertical direction) up to the end position is set to be equal to the inspection distance of the work bottle B to be inspected.

Next, between the position P _D in FIG. 6 and the position P _E which is the discharge position of the work bottle B, the image pickup device T is raised in order to take out the borescope 20 from the work bottle B. To do so, the height of each of the guide portions 50 to 52 is gradually increased so that the borescope 20 is completely removed from the work bottle B at the position P _E. Then, at the position P _E , the work bottle B is transferred to the outlet star wheel 40 and discharged.

The portion from the position P _E in FIG. 6 to the position P _B in FIG. 6 after discharging the work bottle B is prepared for the work bottle B to be subsequently introduced into the rotary surface inspection apparatus S _2. The height of each of the guide portions 50 to 52 does not change in order to keep the height of the image pickup device T at the height of the position P _E in FIG.

Next, the engagement position between the step cam KD and the auxiliary arm 23 and the locus of movement of the auxiliary arm 23 due to the rotation of the rotation inspection base 15 in the second embodiment will be described with reference to FIG. In addition, reference symbols P _{A to} P _E and reference symbol P in FIG.
_O corresponds to the symbols P _{A to} P _E and the symbol P _O in FIG.

As shown in FIG. 7, when the auxiliary arm 23 is engaged with the guide portion 52, the moving distance in the inspection direction (vertical direction) of the image pickup device T corresponding to the high work bottle B is increased. The largest. In addition, when the guide arm 50 is engaged with the auxiliary arm 23, the moving distance of the image pickup device T is reduced corresponding to the work bottle B having a low height.

Further, as shown in FIG. 7, in the rotary type surface inspection apparatus S ₂ of the second embodiment, as in the first embodiment, the height of the work bottle B to be inspected corresponds to the height. Since the moving distance of the imaging device T in the inspection direction and the number of images to be photographed are switched (the number of images to be photographed is the same as in the first embodiment), the reference numeral in FIG. The effective inspection area is from the position of P _{B to} the position of P _D in FIG. 7. Therefore, when the height of the work bottle B is low and the number of images to be photographed is small, the rotation speed of the rotation inspection table 15 can be increased by operating the rotation speed switching device R, and the inspection time can be shortened. .

As described above, in the case of the rotary type surface inspection apparatus S ₂ of the second embodiment, the auxiliary arm 2
The cam K with which 3 is engaged is a stepped cam KD, and the heights of the guide portions 50 to 52 are decreased monotonously and continuously in the inspection range to correspond to the height of the work bottle B to be inspected. The movement distance of the image pickup device T can be switched, and one type of work bottle B corresponding to the height of the range to be inspected in the work bottle B
Since the number of images to be photographed and the rotation speed of the rotation inspection table 15 are switched, the work bottle B having a low height (work bottle B having a high manufacturing capacity) has a high height as in the first embodiment. The work bottle B can be moved faster than the work bottle B.
The inspection time can be shortened according to the manufacturing capacity of the.

In the second embodiment described above, the surface inspection is performed while the image pickup device T descends. However, the present invention is not limited to this, and the inspection start position P is the same as in the first embodiment. _{Between the B} and the inspection end position P _D , the height of each of the guide portions 50 to 52 may be monotonically and continuously increased so that the surface inspection is performed while the imaging device T is moving upward.

[0076]

As described above, according to the first aspect of the present invention, the moving distance of the image pickup means in the inspection direction, the number of images to be taken, and Since the moving speed of the inspection object can be changed, the inspection time can be shortened in accordance with the manufacturing capacity of the inspection object.

Therefore, since the inspection ability is lower than the production ability, the object to be inspected is not stagnant in the inspection process, and the entire production process can be made more efficient and faster. According to the invention described in claim 2 or 3, in addition to the effect of the invention described in claim 1, since the moving distance of the imaging means in the inspection direction can be continuously and freely set, other types It is possible to shorten the moving distance of the image pickup apparatus and shorten the inspection time according to the height of the object to be inspected.

According to the fourth aspect of the present invention, the moving distance of the image pickup means in the inspection direction, the number of images taken, and the moving speed of the object to be inspected are changed according to the height of the area to be inspected in the object to be inspected. Therefore, the inspection time can be shortened in accordance with the manufacturing capacity of the device under test.

Therefore, since the inspection ability is lower than the production ability, the object to be inspected does not become stagnant in the inspection process, and the entire production process can be made more efficient and faster. According to the invention described in claims 5 and 6, in addition to the effect of the invention described in claim 3, the moving distance of the image pickup means in the inspection direction, the number of images taken, and the moving speed of the object to be inspected are:
Since it can be set according to the height of the range to be inspected in the inspected object, the moving distance of the imaging device can be shortened and the inspection time can be shortened corresponding to inspected objects of other heights. .

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a rotary type surface inspection device according to an embodiment.

FIG. 2 is a partial cross-sectional view of the rotary type surface inspection device of the first embodiment.

FIG. 3 is a diagram showing the relationship between the inspection position and the cross section of the inclined cam in the first embodiment.

FIG. 4 is a diagram showing the relationship between the engagement position of the tilt cam KN and the auxiliary arm 23 and the locus of the auxiliary arm 23 in the first embodiment. FIG. It is a locus when the arm 23 is engaged, (b) is a locus when the auxiliary arm 23 is engaged at the position of the symbol b on the tilt cam KN, and (c) is the tilt cam KN. It is a locus | trajectory at the time of engaging the auxiliary arm 23 in the position of the code | symbol a, (d) is sectional drawing of the inclination cam KN in each position on a rotation inspection stand.

FIG. 5 is a partial cross-sectional view of a rotary surface inspection device according to a second embodiment.

FIG. 6 is a diagram showing the relationship between the inspection position and the cross section of the step cam in the second embodiment.

FIG. 7 is a step cam KD and an auxiliary arm 2 in the second embodiment.
3A and 3B are diagrams showing the relationship between the engagement position of No. 3 and the locus of the auxiliary arm 23. FIG. 7A is a locus when the auxiliary arm 23 is engaged with the guide portion 52, and FIG. It is a locus | trajectory at the time of engaging the auxiliary arm 23, (c) is a locus | trajectory at the time of engaging the auxiliary arm 23 with the guide part 50, (d) is a step cam in each position on a rotation inspection stand. K
It is sectional drawing of D.

FIG. 8 is a diagram showing a configuration of a rotary surface inspection device.

FIG. 9 is a diagram showing an effective range of surface inspection for containers to be inspected having different heights.

FIG. 10 is a table showing the relationship between the manufacturing capacity and the inspection capacity for the containers to be inspected having different heights in the conventional technique.

[Explanation of symbols]

10, H ... Conveyor 11, 101 ... Entrance star wheel 12 ... Base cam 13 ... Base 14 ... Support 15 ... Rotation inspection stand 16 ... Cam follower 17 ... Shaft 18 ... Guide bar 19 ... Bottle motor 20 ... Borescope 21 ... CCD camera 22 ... Light 23 ... Auxiliary arm 24 ... Rotating plate 25 ... Camera selector 26A ... Modulation section 26B ... Mixer 27 ... Image number switching device 28 ... Antenna section 29 ... Control section 30A ... Demodulation section 30B ... Video processing section 31 ... Rotation Motors 40, 103 ... Exit star wheels 50, 51, 52 ... Guide unit 102 ... Rotating table B ... Work bottle (inspected container) K ... Cam KN ... Inclined cam KD ... Step cam R ... Rotation speed switching device T ... Imaging device 100, S, S ₁ , S ₂ ... Rotary type surface inspection device a, b, c ... Engagement of auxiliary arm on inclined cam Position α ... Inclination angle

Claims (6)

[Claims] 1. A surface inspection apparatus for inspecting a surface of an object to be inspected moving on a circular orbit, comprising: a holding member provided concentrically with the circular orbit; An auxiliary arm that is movable in a distance corresponding to an inspection range of the inspection object with respect to the inspection direction and is rotatable concentrically with the circular trajectory in synchronization with the inspection object, and is provided on the auxiliary arm. An imaging device for visualizing the surface of the object to be inspected, an inclined portion formed on the holding member for guiding rotation of the auxiliary arm and movement of the object to be inspected in the inspection direction, and the object to be inspected of the auxiliary arm. A shooting number switching unit that switches the number of shots of the imaging device according to the moving distance of the body in the inspection direction, and a moving speed of the object on a circular orbit corresponding to the inspection distance of the object to be inspected. Turn off A surface inspection apparatus comprising: a moving speed switching unit for changing over, and a position on the inclined portion with which the auxiliary arm engages is selected in accordance with an inspection range of the object to be inspected. 2. The surface inspection apparatus according to claim 1, wherein the holding member on which the inclined portion is formed has a radial cross section at an inspection start position on the circular orbit that is inspected in the inspected object. It has a height corresponding to the height of the highest part of the power range, and one side thereof is a substantially triangular shape forming the inclined portion, and an inclination angle formed by the inclined portion and a surface perpendicular to the inspection direction. Is continuously decreased from the inspection start position to the inspection end position on the circular orbit,
Further, the surface inspection apparatus, wherein the inclination angle at the inspection end position corresponds to the height of the lowest part of the range to be inspected in the inspected object. 3. The surface inspection apparatus according to claim 1, wherein the holding member on which the inclined portion is formed is provided with the inclined portion and the inspection direction in a radial cross section at an inspection start position on the circular orbit. The inclination angle formed with the vertical surface corresponds to the height of the lowermost part of the range to be inspected in the inspected object, and the inclination angle is from the inspection start position to the inspection end position on the circular orbit. Continuously increasing in the interval, and further, the cross section in the radial direction at the inspection end position has a height corresponding to the height of the highest part of the range to be inspected in the inspected object, and one side thereof Is a substantially triangular shape that forms the inclined portion. 4. A surface inspection apparatus for inspecting a surface of an object to be inspected moving on a circular orbit, comprising: a holding member concentrically provided with the circular orbit; An auxiliary arm that is movable in a distance corresponding to an inspection range of the inspection object with respect to the inspection direction and is rotatable concentrically with the circular trajectory in synchronization with the inspection object, and is provided on the auxiliary arm. An imaging device for visualizing the surface of the object to be inspected, and at least 2 formed on the holding member to guide the rotation of the auxiliary arm and the movement of the object to be inspected in the inspection direction.
Two guide parts, a number-of-images switching unit that switches the number of images to be captured by the imaging device in accordance with a moving distance of the auxiliary arm in the inspection direction of the inspection object, and an inspection distance of the inspection object in the inspection direction. Moving speed switching means for switching the moving speed of the object to be inspected on a circular orbit, and selecting the guide portion with which the auxiliary arm engages in accordance with the inspection range of the object to be inspected. Characteristic surface inspection device. 5. The surface inspection apparatus according to claim 4, wherein at least two of the guide portions are to be inspected in the inspected object at an inspection start position on the circular orbit with respect to the height in the inspection direction. The guide portions are different depending on the height of the highest part of the range, and continuously decrease between the inspection start position and the inspection end position on the circular orbit, and further, at the inspection end position. A surface inspection device characterized by being compatible with the height of the lowermost part of the inspection object to be inspected. 6. The surface inspection apparatus according to claim 4, wherein at least two of the guide portions are to be inspected in the inspected object at an inspection start position on the circular orbit with respect to the height in the inspection direction. Having a height corresponding to the height of the bottom of the range, continuously increasing between the inspection start position and the inspection end position on the circular orbit,
Further, the surface inspection apparatus is characterized in that each of the guide portions is different corresponding to the height of the highest portion of the range to be inspected in the inspection object at the inspection end position.