JPH05107199A - Inspecting apparatus for appearance of long-sized object - Google Patents

Abstract

PURPOSE:To enable highly reliable inspection in an energy saving manner by a method wherein an object to be inspected moving upward is, first, washed, dried at an upper part of the apparatus and further photographed at the upper part. CONSTITUTION:A pressure hose 10 as object to be inspected is put into a housing at an carry-in port 4 and moved upward vertically with a takeoff roller 11 outside the housing 1 through a lower guide roller 8 at the center thereof. Here, a circular array nozzle of three-stage water jets of a washing means 20 above the roller 8 jets a high pressure water to removed dusts on the external surface of the hose 10. Then, a dry air is jetted circularly with dry air jetting nozzles 30a-30c of a drying means located at the upper part of the means 20 to water drops on the external surface of the hose 10. At this point, no washing liquid lows to the means 30 hence requiring limited energy for drying. A camera means 40 at the uppermost part with in the housing 1 divides the outer circumference of the hose 10 with four CCD cameras 41a-41b being in four thereby enabling accurate judgment of this state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long object abnormality discriminating apparatus for detecting a partial abnormality such as a scratch on a long object.
It can be used when installed on a production line to control the production of a long product, when performing defect detection, when performing defect detection, and then eliminating that part separately from other products.

[0002]

2. Description of the Related Art A conventional long object abnormality discriminating apparatus for detecting a partial abnormality such as a scratch of a long object of this type is an optical fiber which supplies light from four directions around a long object. The guided light sources are arranged at two positions in the transport direction of the length direction, the surroundings of the long object are illuminated by the light sources, and the illuminated long object is specified by another optical fiber in a specific frame body. There is a commercially available optical fiber which is guided to the end portion of the optical fiber arranged vertically with respect to and is imaged by one imaging means.

An improved version of the above is disclosed in Japanese Patent Application Laid-Open No. 1-112143 (Japanese Patent Application No. Sho 6-112143) filed by the present applicant.
No. 2-269848), there is a technique for determining an abnormality of a long object. According to the technique, two or more image pickup means arranged around a long object continuously transferred in the length direction. When,
Image combining means for combining the image information detected by the image pickup means in the vertical direction to form two or more images in one screen unit,
Abnormality detecting means for detecting a partial abnormality of the long object from the output signal of the image synthesizing means, and abnormal point detection for specifying an abnormal point of the long object in which an abnormality is detected by the output of the abnormality detecting means And means.

According to this type of long object abnormality determining apparatus,
An image in a unit of a plurality of screens is input to the anomaly detection unit as an image input in a unit of a screen, and a partial anomaly of the long object is detected therein, and the anomaly location detection unit detects the anomaly location of the long object Can be specified.

[0005]

However, the conventional long object abnormality discriminating apparatus inputs an image in a unit of a plurality of screens to the abnormality detecting means as an image input in a unit of one screen, and thereupon, a portion of the long object is detected. However, if dust or the like adheres to the product immediately after extrusion molding, a defect may be determined even if the product is not damaged.

Further, in the case of manufacturing a long product and cutting it into a length according to the purpose, dust adheres when left in a warehouse or a factory for a period from manufacture to use. The probability increases, and when the inspection is performed by the conventional device, the product is abnormally processed even if there is no defect in the product.

Therefore, an object of the present invention is to provide a visual inspection apparatus for a long object which removes dust and the like adhering to a product and judges a defect on its surface.

[0008]

SUMMARY OF THE INVENTION A visual inspection apparatus for a long object according to the present invention comprises a cleaning means arranged around a long object to be inspected which moves substantially upward, and an upper part of the cleaning means. A drying means for drying the liquid used in the cleaning means, and an imaging means for arranging the drying means above the drying means and surrounding the inspection object to project the periphery of the inspection object. It is built into the housing.

[0009]

In the present invention, a long inspection object is moved in a substantially vertical direction. The moving long inspection object is washed by the cleaning means, the liquid on the surface of the washed inspection object is dried by the drying means located above the cleaning means, and the drying means of the drying means The surroundings of the object to be inspected are imaged by the imaging means located at the upper part.

[0010]

EXAMPLES Examples of the present invention will be described below.

FIG. 1 is an explanatory view of the overall structure of a long object abnormality judging device according to an embodiment of the present invention, and FIG. 2 is a pipeline structure of a long object abnormality judging device according to an embodiment of the present invention. FIG. 3 is a cross-sectional view (a) and a bottom view (b) of a water jet 20a as a cleaning means 20 used in the long object abnormality determination device of one embodiment of the present invention. And
FIG. 3 shows a water jet 2 as the cleaning means 20 of FIG.
0a is a cross-sectional view (a) and a bottom view (b), and FIG. 4 is a cross-sectional view (a) and a bottom view (b) of a dry air injection nozzle 30a as the drying means 30 of FIG. Further, FIG. 5 is an explanatory view of the arrangement of the image pickup means 40 used in the long object abnormality determination device of one embodiment of the present invention, and FIG. 6 is a front view of a CCD camera 41a as the image pickup means 40 of FIG.

In the figure, the housing 1 has a water tank portion 2 in the lower portion, and an exhaust port 3 is formed in the upper portion.
The housing 1 is provided with a carry-in port 4 for a pressure hose 10 as an object to be inspected in the present embodiment, and a support roller 5 for supporting the pressure hose 10 is provided in the carry-in port 4. The conveyance resistance of the pressure hose 10 is made small so as not to be damaged when it enters the carry-in port 4. Also,
A presence detection sensor 6 that detects the presence of the pressure hose 10 is provided at the carry-in port 4. Tension detection sensors 7a, 7b, 7c for judging the tension of the pressure hose 10 are arranged at a position apart from the carry-in port 4 by a predetermined distance, and the supply amount of the pressure hose 10 is adjusted.

Located on the water tank 2 in the housing 1,
In addition, a lower guide roller 8 is arranged at a substantially central portion inside the housing 1 located below the carry-in port 4. A take-up roller 11 for the pressure hose 10 is arranged in the upper surface of the discharge port 9 on the upper flat surface of the housing 1 and in the substantially central portion of the flat surface of the housing 1. The straight line connecting the lower guide roller 8 and the take-up roller 11 in this embodiment is set to be perpendicular to the water surface of the water tank portion 2.
The pressure hose 10 as the inspection object of this embodiment moves vertically upward. With the tension roller 12, the tension of the pressure hose 10 moved by the take-up roller 11 is adjusted to the next step.

Above the lower guide roller 8 inside the housing 1, water jets 20a, 20b, 20c as cleaning means 20 of this embodiment are formed by arranging three stages of nozzles in an annular shape. .. The water jets 20a, 20b, 20c inject water with high water pressure around the outer surface of the pressure hose 10 to remove dust adhering to the outer surface of the pressure hose 10. Water jets 20a, 2 as the cleaning means 20 of the present embodiment
0b and 20c are, for example, as shown in FIG. 3, the water jet 20a has a nozzle body 20 having an injection port 20a3 which is formed in a substantially annular shape around the central through hole 20a5.
It is composed of a sealant 20a2 that forms a water channel 20a4 between a1 and its nozzle body 20a1.

Further, the water jets 20a, 20b,
As shown in FIG. 2, 20c is injected from a strainer 21 arranged in the water tank portion 2 in the housing 1 through a pipeline 23, a required number of valves 24, 25, 26a, 26b, 26c, and a water pressure pump 22. A water stream that supplies water is supplied. Incidentally, in the present embodiment, the water jets 20 are arranged in three stages, and the operating numbers of these are determined by the number of open valves 26a, 26b, 26c. Water droplets jetted by the water jets 20a, 20b, 20c are collected in the water tank unit 2.

Then, in the water tank portion 2 in the housing 1,
Water is supplied from the outside through a pipe line 73 through a valve 71 and a manual valve 72 which are linked to the float,
The water tank portion 2 is always set to have a uniform depth. An overflow pipe line 76 is connected to a pipe line 75 for draining water to the outside through a drain valve 74 at the bottom of the water tank unit 2.
When exchanging the water in the water tank portion 2, drainage is performed to the outside by the drain valve 74, and when the water level of the water tank portion 2 becomes unadjustable by the valve 71 interlocking with the float,
Excess water is drained from the overflow conduit 76.

Water jets 20a, 20b, 20c
In the upper position of the, dry air injection nozzles 30a, 30b, 30c for injecting annularly as the drying means 30 of the present embodiment.
Are arranged. Dry air injection nozzle 3 of this embodiment
0a, 30b, 30c are configured in three stages. Dry air injection nozzle 30a as the drying means 30 of the present embodiment,
For example, as shown in FIG. 4, the dry air injection nozzles 30a and 30c are a nozzle body 30a1 having a central through hole 30a5, and a seal forming a water passage 30a4 and an injection port 30a6 between the nozzle body 30a1 and the nozzle body 30a1. It is composed of a stopper 30a2.

The dry air injection nozzles 30a, 30b,
Reference numeral 30c is for removing water droplets attached to the periphery of the outer surface of the pressure hose 10 by wind pressure and dry air. Particularly, it is preferable that the lowermost dry air injection nozzle 30a be a means for increasing the injection pressure to remove water droplets attached to the periphery of the outer surface of the pressure hose 10 by the air pressure, and the middle dry air injection nozzle 30b and the uppermost dry air injection nozzle 30b. By spraying dry air on the dry air injection nozzle 30c to dehumidify, water drops can be removed with high efficiency, and the movement of the pressure hose 10 can be accelerated. In the present embodiment, as shown in FIG. 2, the outside air is squeezed by a blower 32 through a filter 31 and is squeezed by a blower 32, and through a valve 33c, a lowermost dry air injection nozzle 30
In c, the dry air is directly jetted by increasing the jet pressure. Further, the temperature of the dry air is raised from the middle stage dry air jet nozzle 30a and the uppermost stage dry air jet nozzle 30b via the heat exchanger 34a or the heat exchanger 34b and jetted.

At the top of the housing 1, a plurality of CCD cameras 41 as the image pickup means 40 of this embodiment are provided.
a to 41 d are arranged in the inspection unit housing 45.
The four CCD cameras 41a to 41d are for dividing the outer circumference of the pressure hose 10 as the inspection object of this embodiment into four images, and accurately determining the state. But,
When implementing the present invention, one or a plurality of CCD cameras may be provided depending on the shape and inspection surface of the inspection object, and the arrangement thereof is also determined by the shape and inspection surface of the inspection object. The light projecting means 42 guides light to the entire circumference of the pressure hose 10 as an object to be inspected by an optical fiber 44 having an end portion arranged in a light source box 43 containing a halogen lamp as a light source (not shown). Therefore, the CCD cameras 41a to 41d are shooting with the irradiation light guided by the optical fiber 44. The CCD cameras 41a to 41d are the CCD cameras 4 of FIG.
As shown in FIG. 1a, the vertical rotating member 41a1 and the horizontal rotating member 41a2 can perform vertical positioning and horizontal positioning. The vertical positioning and the horizontal positioning are performed by tightly tightening the screw. In addition, regarding the ones with characters printed on the outer circumference of the pressure hose 10,
By attaching an optical filter to the CCD cameras 41a to 41d, it becomes possible to detect flaws and the like by using the same electric signal as the entire electric signal. On the contrary, the irradiation light guided by the optical fiber 44 may have the same color as the printing ink on the outer circumference of the pressure hose 10 such as characters.

As described above, the appearance inspection apparatus for a long object according to this embodiment has a plurality of stages of water jets 20a arranged around the pressure hose 10 as a long object to be inspected which moves substantially upward. , 20b, 20c, and a cleaning means 20,
A drying means 30 which is disposed above the cleaning means 20 and includes a plurality of stages of dry air jet nozzles 30a, 30b and 30c for drying the liquid used in the cleaning means 20, and disposed above the drying means 30. Then, the CCD cameras 41a to 41 arranged around the object to be inspected to photograph the area around the object to be inspected.
The image pickup means 40 composed of d and the housing 1 containing the cleaning means 20, the drying means 30, and the image pickup means 40 are provided.

Therefore, the cleaning means 20 cleans the periphery of the pressure hose 10 as a long object to be inspected which moves substantially upward, and the cleaning liquid at this time descends around the pressure hose 10. The washed pressure hose 10 is gradually dried at its washing portion and dried by the drying means 30 arranged above the washing means 20. At this time, since the cleaning liquid after cleaning does not flow into the drying means 30, only the cleaning liquid that has adhered needs to be removed. Therefore, the energy required for the drying is small, which is energy saving. Further, a plurality of CCDs arranged above the drying means 30.
Since the image capturing means 40 including the cameras 41a to 41d captures the surroundings of the pressure hose 10, even if dust or the like is attached to the periphery of the long inspection object, the dust or the like is removed. Since the inspection can be performed, only the target flaw can be detected and the reliability of the device can be improved.

Particularly, in the appearance inspection apparatus for a long product of this embodiment, the cleaning means 20, the drying means 30 and the image pickup means 40 are arranged in the vertical direction, and they are built in the housing 1. It can be made compact and its installation space can be small.

By the way, the housing 1 of the above-mentioned embodiment has the water tank portion 2 formed in the lower part thereof, and the water as the cleaning liquid is repeatedly sprayed onto the object to be inspected. It can be a liquid. Of course,
A detergent or the like may be mixed in the water, or the washing liquid may be replaced with a liquid to form a steel ball. Therefore, the water tank portion 2 at the bottom of the housing 1 of the above embodiment can be omitted if necessary.

Further, the cleaning means arranged around the elongated object to be inspected that moves substantially upward in the above-mentioned embodiment uses the cleaning water as described above, but the present invention is implemented. In such a case, a liquid such as water, a gas such as air, a solid such as a small steel ball, a small rubber ball, and a small resin ball, or ultrasonic vibration can be used.

The drying means, which is disposed above the cleaning means of the above-mentioned embodiment and dries the liquid used in the cleaning means, is performed by the jetting force of air and low humidity, but the present invention is carried out. In this case, the present invention is not limited to these, and induction or dielectric or resistance heating can be performed directly depending on the object to be detected. Further, the drying can be performed by using the heat of the light source used in the image pickup means.

Further, a plurality of CCD cameras are used as the image pickup means which is arranged above the drying means of the above-mentioned embodiment and which is arranged around the object to be inspected and photographs the periphery of the object to be inspected. ,
When the present invention is carried out, the light source and the camera are not specified, and the signal processing thereof is not specified. That is, as the image pickup means which is arranged around the inspection object and takes an image of the periphery of the inspection object, the camera may be rotated to determine the abnormal portion, or the discontinuity point of the video signal may be detected. It may be detected.

[0027]

As described above, the appearance inspection apparatus for a long object according to the present invention is provided with a cleaning means disposed around a long object to be inspected which moves substantially upward, and an upper part of the cleaning means. And a drying means for drying the liquid used in the cleaning means, and an imaging means arranged above the drying means and arranged around the inspection object to take an image of the periphery of the inspection object. Is built into the housing.

Therefore, the cleaning means cleans the periphery of the elongated object to be inspected which moves substantially upward, and the cleaning liquid at this time descends around the object to be inspected. The washed long-sized object to be inspected is lifted and dried by the drying means arranged above the cleaning means. At this time, since the cleaning liquid after cleaning does not flow into the drying means, it is sufficient to remove only the cleaning liquid that has adhered, so that the energy can be reduced,
It is energy saving. Further, since the image pickup means arranged above the drying means photographs the periphery of the inspection object, even if dust or the like adheres to the periphery of the long inspection object, the dust or the like Since the inspection can be performed by removing the defects, only defects such as scratches on the surface can be detected, and the reliability of the device can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an overall configuration of a long object abnormality determination device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a pipeline structure of a long object abnormality determination device according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view (a) and a bottom view (b) of a water jet used in a long object abnormality determination device according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view (a) and a bottom view (b) of a dry air injection nozzle used in the long object abnormality determination device according to an embodiment of the present invention.

FIG. 5 is an explanatory diagram of an arrangement of image pickup means used in the abnormality determination device for a long object according to an embodiment of the present invention.

FIG. 6 is a front view of a CCD camera used in the abnormality determination device for a long object according to an embodiment of the present invention.

[Explanation of symbols]

 1 Housing 10 Pressure Hose 20 Cleaning Means 20a, 20b, 20c Water Jet 30 Drying Means 30a, 30b, 30c Dry Air Jet Nozzle 40 Imaging Means 41a-41d CCD Camera

Claims (1)

[Claims] 1. A cleaning means disposed around a long object to be inspected which moves substantially upward, and a drying means which is disposed above the cleaning means and dries the liquid used in the cleaning means. And an image pickup unit which is arranged above the drying unit and which is arranged around the object to be inspected and photographs the periphery of the object to be inspected, and a housing which incorporates the cleaning unit, the drying unit, and the image pickup unit. Appearance inspection device for long objects.