KR20030023146A - Apparatus for inspecting the quality of a bottle cap - Google Patents

Abstract

PURPOSE: An apparatus and a method for examining quality of bottle cap are provided to promptly judge badness of objects being examined and accurately remove bad objects. CONSTITUTION: A first conveyor and a second conveyor(103) are different in moving rate, and on which a plurality of objects to be examined are secured. A badness judging part(135) is installed at any one of the conveyors to judge badness of the objects. A bad object processing part(137) removes the object if the object is judged bad. An object recognizing element(129) recognizes the plurality of objects. An image detecting element(127) outputs an image signal from the plurality of objects. An encoder(133) outputs pulses from a rotation of a rotary shaft in case that the object is judged bad. A solenoid valve(131) discharges air based on the number of the pulses.

Description

Quality Inspection Apparatus and Method for Bottle Caps {APPARATUS FOR INSPECTING THE QUALITY OF A BOTTLE CAP}

The present invention relates to a quality inspection apparatus, and more particularly, to an apparatus and method for quickly determining whether a quality inspection object is defective and then accurately removing the defective quality inspection object.

At present, many quality inspection processes are automated at all sites, making it common for machines to perform quality inspections.

However, the defect inspection on the bottle cap is not yet automated, and the situation is absolutely dependent on the human visual discrimination. That is, the bottle caps are arranged in a line at the top of the conveyor, and the person who inspects the defect is standing at a predetermined position or sitting and grasps the state of the bottle caps passing by his eyes, and picks up the defective bottle caps by hand. Otherwise, the bottle cap proceeds to the next process step due to the continuous operation of the conveyor.

As described above, when a person visually inspects a defect, small bottle caps are continuously checked for defect inspection, and the person must grasp the quality state of each bottle cap and examine whether there is a defect.

If a person who does a defect inspection does not concentrate even for a while, the bottle cap which is not a defect inspection may go to the next process, and the finished product may become defective.

Therefore, when a person performs a defect inspection with the naked eye, the accuracy of the defect inspection is lowered, which in turn lowers the reliability of the product.

In addition, due to the limitation of the eye's discrimination ability, accurate defect inspection becomes difficult.

In addition, when a person performs a defect inspection with the naked eye, there is a problem that the processing speed of the defect inspection per unit time is considerably lowered.

The present invention has been made in order to solve the above problems, an object of the present invention is to provide a quality inspection device for a bottle cap that can automatically determine whether the bottle cap is defective by installing an inspection device on one side of the conveyor.

Another object of the present invention is to provide a bottle cap quality inspection apparatus which can be accurately inspected for each bottle cap by using an inspection apparatus by dividing the conveyor into two so as to make a difference in operating speeds.

It is another object of the present invention to provide an apparatus structure for removing defective caps from a conveyor.

It is another object of the present invention to provide a method for controlling the inspection of the quality of a bottle cap using the inspection device.

1 is an overall schematic diagram of a quality inspection apparatus according to a preferred embodiment of the present invention.

2 is a block diagram of a quality inspection unit in a quality inspection apparatus according to an embodiment of the present invention.

3 is a detailed configuration diagram of a defective object processing unit in the quality inspection unit of FIG. 2;

Figure 4 is a cross-sectional view of the solenoid valve in the quality inspection device according to a preferred embodiment of the present invention.

5 is a flow chart for explaining a method for inspecting the quality of a bottle cap using a quality inspection apparatus according to a preferred embodiment of the present invention.

<Name of the code for the main part of the drawing>

101, 103: first and second conveyor 105: support

107: quality inspection unit 111: connection member

113, 115: 1st and 2nd rotation shaft 117, 119: 1st and 2nd motor

125: light exposure unit 127: image detection unit

129: target recognition unit 131: air discharge unit

133: rotation detection unit 135: failure determination unit

137: bad target processing unit 139: counter

141: removal target control unit 143: discharge time control unit

145: valve body 151: air outlet

153: orifice 155: solenoid

157: valve

According to a preferred embodiment of the present invention for achieving the above object, the conveyor is operated corresponding to the rotation of each gear having a different gear ratio, outputs a recognition signal generated from the quality inspection object, based on the recognition signal Generating an image signal from the quality inspection object, determining whether there is a defect based on the image signal, and processing the quality inspection object according to a determination result, wherein the conveyor comprises a first conveyor and a second conveyor. It includes, wherein the gear ratio is provided a quality inspection method for making the first gear larger than the second gear.

According to the quality inspection method, when the quality inspection object is defective, the processing of the quality inspection object includes generating a pulse signal from the rotational speed of the rotation axis based on the rotation detection signal, and previewing the number of the pulse signals in advance. Compared to the set number of pulses, it may include the solenoid valve is driven according to the comparison result.

According to the quality inspection method, when the number of pulse signals coincides with a preset pulse number, whether the solenoid valve is opened in response to the generated air discharge signal, and whether the opening time of the solenoid exceeds the preset air discharge time. The electronic device may further include blocking the solenoid valve in response to the generated air discharge blocking signal when the preset air discharge time is exceeded.

According to another preferred embodiment of the present invention, a recognition signal is output from the quality inspection object, an image signal is output from the quality object based on the recognition signal, the number of pixels is calculated using the image signal, A method for determining a failure of a quality inspection object is provided, which comprises comparing the number of pixels with a preset pixel number and determining that the quality inspection object is normal when the pixel number matches the preset pixel number.

According to the method for determining a failure of the quality inspection object, when the number of pixels does not match a preset number of pixels, the quality inspection object may be determined as a failure, and a bad signal may be generated according to a failure determination result. .

According to another preferred embodiment of the present invention, when the quality inspection object is bad, the rotational speed of the rotating shaft is detected, the detected rotational speed is converted and output as a pulse, and the air discharge signal is based on the number of pulses And a method for removing a quality inspection object which includes generating air in response to the air discharge signal.

According to the method for removing the quality inspection object, the valve is opened in response to the air discharge signal, and it is determined whether a preset air discharge time is exceeded, and when the air discharge time exceeds a preset air discharge time, air discharge is performed. The method may further include generating a cutoff signal and blocking the valve in response to the air discharge cutoff signal.

According to another preferred embodiment of the present invention, at least one or more moving means having a different moving speed difference, and a plurality of quality inspection objects are seated thereon, installed in one of the at least one moving means, A defective object for determining whether or not a defective object is determined based on the plurality of quality inspection objects and one quality inspection object among the plurality of quality inspection objects, the defective object for removing the one quality inspection object There is provided a quality inspection apparatus comprising a processing means.

According to the quality inspection apparatus, an object recognition means for recognizing the plurality of quality inspection objects, an image detection for outputting an image signal from the plurality of quality inspection objects while the plurality of quality inspection objects are recognized from the recognition means. Means for discharging air according to the determination result of the defective object processing means based on the rotation detection means for outputting a pulse from the rotation of the rotary shaft and the number of pulses when the one quality inspection object is determined to be defective. It may further include an air discharge means.

According to the quality inspection apparatus, the defective object processing means determines whether there is a bad signal received by the counter, and compares it with a preset pulse number based on the pulse input from the rotation detecting means when the bad signal exists. The control means for removal and the comparison result generate an air discharge signal when it matches the preset number of pulses, while checking the air discharge time and generating an air discharge cutoff signal when the preset air discharge time is exceeded. It may include an adjusting means.

According to the quality inspection device, the at least one moving means includes the first conveyor and the second conveyor, wherein a connecting member is installed between the first conveyor and the second conveyor, and to the end of each conveyor. Gear ratios of the connected gears are different, and the object recognition means and the air discharge means may be installed on one side of the second conveyor.

According to another preferred embodiment of the present invention, an orifice having a diameter of 1.8 to 2.2 mm and a valve installed vertically on one side of the orifice to control the air pressure in the middle between the air inlet and the air outlet, and A solenoid valve structure is provided that includes a solenoid installed in a wound form around the valve.

According to the solenoid valve structure, the diameter of the air discharge port is 0.8 to 1.2mm, the air pressure may be 4.7 to 5.3kg / mm ² .

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is an overall schematic diagram of a quality inspection apparatus according to a preferred embodiment of the present invention. First of all, it should be noted that the quality inspection apparatus can perform quality inspection on any object other than a bottle cap when adjusting a setting value for quality inspection or modifying a component. Therefore, the quality inspection apparatus may be modified at any time so as to be applied to the target article to be inspected for quality. In order to clarify how the quality inspection is made, the present invention will select a bottle cap as an embodiment.

Referring to FIG. 1, the quality inspecting apparatus includes two conveyors 101 and 103 and a quality inspecting unit 107. The two conveyors 101 and 103 may be divided into a first conveyor 101 and a second conveyor 103 for convenience of description. The first conveyor 101 and the second conveyor 103 are installed in close contact with the upper portion of the support 105 in order to transfer a plurality of bottle caps. A connection is made between the first conveyor 101 and the second conveyor 103 so that the plurality of bottle caps 109 seated on the first conveyor 101 are moved to the second conveyor 103. The member 111 may be installed. The first conveyor 101 is operated by the first rotating shaft 113, the first rotating shaft 113 is in contact with the first motor 117, the first motor 117 is the first The rotating shaft 113 is rotated. Of course, the rotation speed of the first motor 117 may be determined by the quality inspecting unit 107. That is, the rotation speed value of the first motor 117 is preset in the quality inspecting unit 107, so that the rotation speed value may be sent to the first motor 117 at the moment when the quality inspection device is operated. . The rotation speed value may be set again through an input device (not shown) by an administrator managing the quality inspecting device. The first conveyor 101 described above may be equally applied to the second conveyor 103. That is, a second rotation shaft 115 is connected to the second conveyor 103, and an end of the second rotation shaft 115 may be coupled to the second motor 119. Of course, the rotation speed of the second motor 119 may also be determined by the quality inspecting unit 107.

On the other hand, the first conveyor 101 and the second conveyor 103 there is a difference in the moving speed. When the rotation speed values of the first motor 117 and the second motor 119 are set differently in the quality inspecting unit 107, the quality inspecting unit 107 is configured to operate when the quality inspecting apparatus is operated. Send a rotation speed value differently set to the first motor 101 and the second motor 103, respectively, the rotation of the first motor 117 and the second motor 119 in accordance with the rotation speed value. can do. Then, each of the rotational speeds of the first motor 117 and the second motor 119 is transmitted to each of the rotary shafts 113 and 115 as they are, so that the first conveyor 101 and the second conveyor 103. Differences occur in the speed of movement.

Preferably, the moving speed of the second conveyor 103 is about 1.2 to 1.3 times greater than the moving speed of the first conveyor 101. Here, the movement speed of the first conveyor 101 and the movement speed of the second conveyor 103 are different from each other in order to adjust the distance between the bottle caps moving in a row and the bottle caps. For example, the plurality of bottle caps 109 may enter the first conveyor 101 with a tight gap between the bottle caps. The first conveyor 101 may transfer the plurality of bottle caps 109 to a place where the connection member 111 is located in a row. The bottle cap transferred to the connection member 111 is pushed by a bottle cap behind it and moved to the upper part of the connection member 111, and the bottle cap on the connection member 111 is pushed by a bottle cap behind the second conveyor ( 103 may be entered. As described above, since the moving speed of the second conveyor 103 is greater than the moving speed of the first conveyor 101, the bottle cap entering the second conveyor 103 may be moved at a higher speed. have. Similarly, the bottle cap behind it which has entered the second conveyor 103 is also moved faster. Therefore, the bottle cap, which has been entered first, moves at a high speed and then moves to some extent, enters and moves to the second conveyor 103. Therefore, the gap between the bottle cap that entered first and the bottle cap which entered later becomes larger than the gap when moving on the first conveyor 101.

According to another embodiment of the present invention, the first conveyor 101 and the second conveyor 103 may be operated by one motor. That is, a first gear and a second gear (not shown) are installed at ends of the rotation shafts 113 and 115 of the first conveyor 101 and the second conveyor 103, respectively, and connect the respective gears. A chain member may be provided. Here, the first gear and the second gear is different gear ratio, it is preferable that the first gear is larger than the second gear. The motor operates one of the first gear and the second gear, so that the first conveyor 101 and the second conveyor 103 may have different speeds due to different gear ratios. That is, since the gear ratio of the first gear is smaller than that of the first gear, the moving speed may be faster than the second conveyor 103 than the first conveyor 101.

In order to prevent the plurality of bottle caps 109 moving on the first conveyor 101 and the second conveyor 103 from being separated in the horizontal direction, a guide (not shown) is provided with the first conveyor 101 and the first conveyor. 2 can be installed on both sides of the conveyor (103). In addition, the guide may be adjusted in width manually by a person or automatically by an electronic device. It should be noted that this is to be applied when the diameters of the caps are different from each other.

In order to increase the quality inspection throughput of the plurality of bottle caps 109, the quality inspecting apparatus may further include at least one or more in the horizontal direction of the first conveyor 101 and the second conveyor 103. Therefore, at the same time, the plurality of bottle caps 109 may be moved by at least one or more conveyors to significantly increase the number of bottles of bottle caps processed at one time.

Referring back to FIG. 1, the quality inspecting unit 107 is installed on the second conveyor 103 so that when one of the plurality of caps 109 enters a predetermined position, the quality inspector 107 is executed. If the bottle cap is determined to be defective, and the bottle cap is determined to be defective, the bottle cap is removed on the second conveyor 103 by a predetermined procedure. The quality inspecting unit 107 will be described in more detail with reference to FIG. 2.

2 is a block diagram of a quality inspecting unit in a quality inspecting apparatus according to a preferred embodiment of the present invention. The quality inspecting unit 107 is installed at each position of the second conveyor 103 to transmit a detected signal and an electronic device to perform quality inspection on the bottle cap based on the signal detected from the external device. It can be configured as. For example, the external device includes a light exposure unit 125, an image detection unit 127, a target recognition unit 129, an air discharge unit 131, a rotation detection unit 133, and the like. The determination unit 135 and the defective object processing unit 137 may be included. Hereinafter, each of these components is demonstrated.

As mentioned above, the quality inspecting unit 107 may include the light exposing unit 125, the image detecting unit 127, the object recognizing unit 129, the air discharge unit 131, and the rotation detecting unit ( The electronic device may include an external device including the 133, the electronic device including the defect determining unit 135, and the defect target processing unit 137.

First, the target recognition unit 129 is installed at a predetermined position on one side of the second conveyor 103 when one of the plurality of bottle caps (hereinafter referred to as the bottle cap 121 for recognition) enters the predetermined position. In addition, the recognition signal is detected by the bottle cap 121 for recognition and provided to the defect determining unit 135. Here, the target recognition unit 129 may be an optical sensor. The optical sensor continuously irradiates light to identify the presence or absence of a bottle cap using the light when the bottle cap enters the predetermined position, and from the defect sensor 135 to recognize the presence of the bottle cap. I can send it. Here, the light irradiated from the optical sensor is preferably to irradiate the side surface of the cap.

The light exposure unit 125 irradiates light to the recognition bottle cap 121 so that the image detection unit 127 detects an image of the recognition bottle cap 121. The light exposure unit 125 may irradiate any light irradiating device capable of detecting an image by irradiating light, but preferably, may be formed of a plurality of white diodes having a semi-permanent lifetime. In addition, the light exposure unit 125 may be provided with a geometric structure to collect light to a certain degree. In addition, the light exposure unit 125 may be adjusted in height such that a focus is formed on the top of the bottle cap 121 for recognition. Preferably, the diameter of the focal point formed on the cognitive cap 121 is larger than the diameter of the cognitive cap 121. This will be described later in detail. The height means from the upper part of the bottle cap 121 to the light exposure portion 125, when the quality of the different bottle caps larger than the current bottle cap, the height is adjusted to focus on the top of the different bottle caps It can be adjusted to be formed. Here, the height adjustment may be performed manually or automatically.

The image detection unit 127 is installed at the rear end of the light exposure unit 125, and when the bottle cap 121 is recognized from the target recognition unit 129, the image detection signal of the failure determination unit 135 is detected. By using the light irradiated from the light exposure unit 125, the image of the upper portion of the bottle cap 121 for recognition is detected. In addition, the image signal detected by the image detection unit 127 may be provided to the failure determination unit 135 may be performed to determine the failure of the bottle cap 121 for recognition. The image detecting unit 127 may include any camera that may detect an image from the bottle cap 121 for recognition and provide the image to the defect determining unit 135.

The defect determination unit 135 determines whether the recognition bottle cap 121 is defective based on the image signal input from the image detection unit 127. That is, when the video signal is input, the failure determining unit 135 reproduces the video signal and restores the image. The defect determining unit 135 determines an area to perform a quality inspection on the bottle cap 121 for recognition based on the restored image. Here, the area may be determined based on a preset area. The failure determining unit 135 calculates the number of pixels based on the image in the area. Then, the failure determining unit 135 checks whether the number of pixels in the area matches the preset number of pixels. The failure determination unit 135 determines that the result is normal when it matches the preset number of pixels. If the failure determination unit 135 does not match, the failure determination unit 135 determines that the failure is normal, and provides the result to the failure target processing unit 137. Here, the number of pixels may be calculated based on a predetermined area using a bottle cap in a normal state as a sample, and may be stored in a memory or the like. Accordingly, when the image signal is input from the image detector 127, the defect determining unit 135 restores the image signal to an image, and then stores the number of pixels included in a predetermined area based on the image and the memory. Compared with the stored preset number of pixels, it may be determined whether or not the recognition bottle cap 121 is defective.

When the result of the recognition bottle cap 121 is input from the defect determining unit 135, the defective object processing unit 137 adjusts the discharge of air based on the number of pulses output from the rotation detecting unit 133. Then, the recognition bottle cap (hereinafter, referred to as the removal bottle cap 123) determined as defective is removed. Here, the rotation detection unit 133 will be described in order to make the present invention more clearly understood before describing the defective object processing unit 137.

The rotation detector 133 is connected to an end at which the second rotation shaft 115 installed at one end of the second conveyor 103 is exposed in the horizontal direction to detect a pulse based on the rotation of the second rotation shaft 115. do. That is, the rotation detector 133 converts the rotation of the second rotation shaft 115 into a pulse, and provides the converted pulse to the failure target processor 137. To this end, the rotation detector 133 is preferably an encoder for outputting 500 pulses per rotation of the rotation shaft. The encoder may be used to determine the position of the bottle cap 123 for removal based on the number of pulses output per revolution of the second rotary shaft 115. In general, the encoder is commercially available as a separate product, with the number of pulses outputted by one rotational shaft being set to 500, 1000, 1500, and 2000. Therefore, one of these can be used as the rotation detector 133 of the present invention. For example, assume that the diameter of the second rotary shaft 115 is D, and the encoder outputs 500 pulses per revolution. Then, when the second rotation shaft 115 is rotated once, the movement cap of the removal bottle cap 123 is πD. If the moving distance to the position where the removal cap 123 is removed by air discharge is 3πD, the second rotation shaft 115 should be rotated three times. Accordingly, when the rotation detector 133 outputs 500 pulses per rotation while the second rotation shaft 115 rotates three times, the rotation detection unit 133 provides the failure target processing unit 137 with the failure target processing unit 137. When 500 pulses are input three times, it may be determined that the removal cap 123 has entered the position to be removed, and the air may be discharged to remove the removal cap 123. Therefore, the number of times 500 pulses must be set in advance and stored in the removal target processor 137 while moving to the position where the removal cap 123 is to be removed. The removal target processor 137 will be described in more detail with reference to FIG. 3.

3 is a detailed configuration diagram of a failure target processing unit in the quality inspection unit of FIG. 2. Referring to FIG. 3, the defective object processor 137 may include a counter 139, a removal object controller 141, and a control unit 141 to control the removal of the bottle cap 123 using air when entering the predetermined position. It may include a discharge control unit 143, and the like.

The counter 139 checks the coefficient of the input bad signal when the bottle cap 123 for recognition from the bad determination unit 135 is determined to be bad.

The removal target controller 141 monitors whether the bad signal is input to the counter 139. When the bad signal is input to the counter 139, the removal target controller 141 transmits a rotation detection signal to the rotation detection unit 133 and inputs 500 pulses output from the rotation detection unit 133. Receive. The removal target control unit 141 calculates how many pulses are output by 500 and compares them with a preset number, and transmits an air discharge signal to the air discharge unit 131 according to a matching result to stop the recognition bottle cap. 123 is removed using air. Here, the removal object control unit 141 must continuously transmit the rotation detection signal to the rotation detection unit 133 until the number of pulses output by 500 becomes a preset number.

The discharge controller 143 controls the air to be discharged only for a preset time when the number of pulses 500 output from the removal target controller 141 matches a preset number. That is, when the discharge control unit 143 receives the air discharge signal from the removal target control unit 141, the air discharge signal is sent to the air discharge unit 131 to discharge the air, Send an air shutoff signal to shut off the air. Here, the air discharge time is preferably set to 0.02 seconds and stored.

Referring back to FIG. 2, air is discharged from the air discharge unit 131 by the discharge control unit 143. Here, the air outlet 131 is preferably a solenoid valve. The structure of the solenoid valve will be described in detail with reference to FIG. 4. When the air discharge signal is input from the discharge control unit 143, the air discharge unit 131 opens a valve by supplying a current to the solenoid. Then, the air blocked by the valve is discharged through the discharge port via the orifice to push the removal bottle cap 123 to the side. On the contrary, when the air discharge blocking signal is input from the discharge adjusting unit 143, the current supplied to the solenoid is cut off, and the valve which was finally opened is closed again, thereby discharging the air. Therefore, since the plurality of bottle caps 109 move at a high speed in a line, the solenoid valve can be seen that the precise opening and closing of the valve, air pressure, and the structure of the solenoid valve are very important. To more clearly explain this, the structure of the solenoid valve will be described with reference to FIG. 4.

4 is a cross-sectional view of the solenoid valve in the quality inspection device according to the preferred embodiment of the present invention. Referring to FIG. 4, the solenoid valve is configured to allow air to be discharged due to opening and closing of the valve. To this end, the solenoid valve structure is composed of a valve body 145, a solenoid 155 and a valve 157. The valve body 145 controls the flow of air introduced through the air inlet 149 for entering air, the air outlet 151 for discharging the air, and the air inlet 149, and controls the flow of the valve 157. It consists of an orifice 153 formed narrow in width to facilitate opening and closing. The valve 157 is installed to one side of the orifice 153 in the transverse direction and is opened and closed by the air discharge signal input from the discharge control unit 143. The solenoid 155 is formed by twisting the periphery of the valve 157 to open the valve 157 when it is excited by the current, and close the valve 157 when the current is cut off. Of course, the current supplied to the solenoid 155 is performed by the control of the discharge control unit 143.

As shown in FIG. 4, the structure of the solenoid valve may be different in diameter from the air inlet 149, the orifice 157, and the air outlet 151. As described above, in the quality inspection device, the plurality of bottle caps move at a constant speed in a row. In this case, when the solenoid valve is determined to be defective from the defect determining unit 135, the corresponding bottle cap must be removed accurately using air. If the air is not discharged correctly, other caps that follow the cap can be removed. In addition, when the intensity of the air pressure discharged to the air discharge port 151 does not reach a predetermined standard, the bottle cap determined as a defect may proceed without being removed, so that it is always set to the optimum air pressure. desirable. To achieve this, an optimal variable value can be calculated through repeated experiments using the air pressure, the orifice diameter, and the air outlet diameter as variables. That is, it is preferable that the air pressure is 5kg / mm ² , the orifice diameter is 2mm, and the air outlet diameter is 1mm. As a result of experiments based on these variable values, the accuracy of removing the cap was significantly improved.

5 is a flowchart illustrating a method of inspecting the quality of a bottle cap using a quality inspection apparatus according to an exemplary embodiment of the present invention. In order to inspect the quality of the bottle cap, the conveyor is first operated (step 201). That is, the staff in charge turns on the power to operate the quality inspecting apparatus, and then issues a start command. The quality inspecting apparatus drives the motor based on the rotational speed value corresponding to the start instruction so that the conveyor operates. In this case, the rotation speed value may be set in advance by the staff in charge. As described above, the conveyor is divided into a first conveyor and a second conveyor, and is operated by a motor that rotates according to different rotation speed values. Therefore, the moving speeds of the first conveyor and the second conveyor are different. That is, the moving speed of the second conveyor is preferably operated faster than the moving speed of the first conveyor. Therefore, it is preferable that the gap between the bottle caps on the second conveyor is larger than the gap between the bottle caps on the first conveyor, and the bottle caps on the second conveyor are equally spaced.

As each conveyor operates, a plurality of bottle caps move on the conveyors. The target recognition unit checks whether each bottle cap is recognized each time the bottle cap passes in front of the bottle cap, and sends a signal to the failure determining unit to determine if the bottle cap is recognized (step 203).

The defect determining unit transmits an image detection signal to the image detecting unit when a recognition signal is input, and the image detecting unit generates an image signal from the bottle cap for recognition according to the image detecting signal and provides the image signal to the defect determining unit (step 205).

When the video signal is input, the failure determining unit compares the video signal with a normal quality video based on the video signal (step 207). That is, the failure determining unit restores the image signal to an image, calculates the number of pixels included in the area using a predetermined area based on the image, and then determines whether the pixel number matches the predetermined number of pixels. Determine. The failure determining unit determines normal if it matches the preset number of pixels, and if it does not match, determines that it is defective, and provides the result to the failure target processing unit.

Then, the removal target control unit monitors the counter to check whether there is a bad signal input from the failure determining unit (step 209). Here, the defective signal means a signal for the corresponding bottle cap determined as defective by the defective determining unit. In addition, when the bad signal is input to the counter, the removal target controller transmits a rotation detection signal to the rotation detection unit.

The rotation detector detects the number of rotations of the rotation shaft based on the rotation detection signal, converts the rotation number into pulses, and provides the converted pulse to the removal target detector (step 211). As described above, in the rotation detector, 500 pulses may be generated in one rotation of the rotation shaft.

The removal target controller compares the number of pulses input from the rotation detector with a preset number of pulses (step 213). If the result of the comparison matches, the discharge control unit transmits an air discharge signal to the air discharge unit (step 215), and if not, compares the pulse number with a preset pulse number until it matches.

When an air discharge signal is input from the discharge control unit, the air discharge unit discharges air by operating a solenoid valve (step 215). That is, the air discharge unit excites the solenoid by supplying a current, and the air is discharged through the air discharge port while the orifice is opened by pulling the valve by the excitation.

On the other hand, the discharge control unit determines whether or not the generation of the air discharge blocking signal using a predetermined discharge time (step 217). When the determination result exceeds the preset discharge time, the discharge control unit generates the air discharge block signal, and then sends the air discharge block signal to the air discharge unit. Then, the air outlet closes the open valve by cutting off the current supplied to the solenoid based on the air outlet blocking signal (step 219).

As described above, the quality inspection apparatus determines whether the defect is based on the image signal, and if the determination result is defective, determines the air discharge time based on the number of pulses output from the rotation detector.

In addition, the quality inspection device can accurately remove the bottle cap that is determined to be defective by air by opening the solenoid valve when the air discharge time comes.

In addition, the quality inspection device can be optimally set the interval between the bottle caps by adjusting the moving speed of each conveyor.

In addition, the quality inspection device can improve the accuracy of the bottle cap removal by improving the structure of the solenoid valve to optimize the opening and closing of the air and the air pressure to remove only the bottle cap determined as defective.

Although the present invention has been mainly described by setting the bottle cap as an embodiment, any article for quality inspection by modifying the guide installed on the conveyor, the height adjustment of the ball exposure portion, the moving speed of each conveyor, etc. in the quality inspection apparatus. It is clearly shown that the present invention can be applied for quality inspection.

As described above, according to the quality inspection apparatus for the bottle cap of the present invention, it is possible to quickly determine whether the bottle cap is defective.

According to the quality inspection apparatus for a bottle cap of this invention, the structure of a solenoid valve can be improved and the bottle cap determined to be defective can be removed correctly.

According to the quality inspection device for a bottle cap according to the present invention, since the quality of the bottle cap is accurately and quickly inspected, the defect discrimination error is reduced, thereby significantly reducing the cost.

Although the above has been described in detail through the preferred embodiments of the present invention, the contents are not limited to the above embodiments. In addition, one of ordinary skill in the art may change or modify the present invention in various ways without departing from the scope of the following claims.

Claims (23)

Outputting a recognition signal generated from a quality inspection object; Generating an image signal from the quality inspection object based on the recognition signal; Determining whether the defect is based on the video signal; And Processing the quality inspection target according to a determination result Quality inspection method comprising a. The method of claim 1, Prior to the step of outputting the recognition signal, The conveyor is operated in correspondence with the rotation of each gear having a different gear ratio Include more, The conveyor is a quality inspection method comprising a first conveyor and a second conveyor. The method of claim 2, The gear ratio is a quality inspection method, characterized in that the first gear is larger than the second gear. The method of claim 1, The step of processing the quality inspection object, Generating a pulse signal from the rotational speed of the rotating shaft based on the rotation detection signal when the quality inspection object is defective as a result of the determination; Comparing the number of pulse signals with a preset pulse number; And Step of driving solenoid valve according to the comparison result Quality inspection method comprising a. The method of claim 4, wherein When the number of pulse signals coincides with a preset pulse number, opening the solenoid valve in response to the generated air discharge signal; Determining whether the opening time of the solenoid exceeds a preset air discharge time; And When the preset air discharge time is exceeded, the solenoid valve is shut off in response to the generated air discharge shutoff signal Quality inspection method characterized in that it further comprises. In the method for determining whether there is a defect based on the quality inspection object moving on the conveyor, Outputting a recognition signal from the quality inspection object; Outputting an image signal from the quality object based on the recognition signal; Calculating the number of pixels using the video signal; Comparing the number of pixels with a preset number of pixels; And Determining that the quality inspection target is normal when the number of pixels matches the preset number of pixels. Defective determination method of the quality inspection object comprising a. The method of claim 6, If the number of pixels does not match a preset number of pixels, determining the quality inspection object as defective; And The step of generating a bad signal according to the result of the bad determination The defect determination method of the quality inspection object further comprising a. The method of claim 6, Determining whether the quality inspection object is a quality inspection position; And When the quality inspection object is a quality inspection position, generating a recognition signal The defect determination method of the quality inspection object further comprising a. In the method for removing the quality inspection object when it is determined that the quality inspection object moving on the conveyor is defective, Detecting the rotation speed of the rotating shaft when the quality inspection object is defective; Converting the detected rotation speed and outputting the pulse; Generating an air exhaust signal based on the number of pulses; And Air is discharged in response to the air discharge signal Removal method of the quality inspection object, characterized in that comprises a. The method of claim 9, Generating a bad signal when the quality test object is bad; Checking whether the bad signal is generated; And Generating a rotation detection signal if the bad signal exists Method of removing the quality inspection object further comprising a. The method of claim 9, And the number of pulses is compared with a predetermined number. The method of claim 9, Opening a valve in response to the air exhaust signal; Checking whether the preset air discharge time is exceeded; Generating an air bleed off signal if the air bleed time exceeds a preset air bleed time; And Shutting off the valve in response to the air exhaust shutoff signal Method of removing the quality inspection object further comprising a. At least one moving means having different moving speed differences and having a plurality of quality inspection objects seated thereon; Failure determining means installed in one of the at least one moving means and determining whether there is a defect based on the plurality of quality inspection objects; And A defective object processing means for removing the one quality inspection object when one of the quality inspection objects is determined to be defective; Quality inspection device, characterized in that configured to include. The method of claim 13, Object recognition means for recognizing the plurality of quality inspection objects; And Image detection means for recognizing the plurality of quality inspection objects from the recognition means and outputting image signals from the plurality of quality inspection objects Quality inspection device further comprising. The method of claim 13, Rotation detection means for outputting a pulse from the rotation of the rotation shaft when the one quality inspection object is determined to be defective; And Air discharge means for discharging air according to a determination result of the defective object processing means based on the number of pulses Quality inspection device further comprising. The method of claim 15, And said rotation detecting means is an encoder for generating 480 to 520 pulses per revolution. The method of claim 15, The air exhaust means is a quality inspection device, characterized in that the solenoid valve. The method of claim 13, The defective object processing means, Removal target control means for determining whether there is a bad signal received by the counter and comparing the preset number of pulses based on a pulse input from the rotation detecting means when the bad signal exists; And As a result of the comparison, an air discharge signal is generated when the number of pulses coincides with the preset pulse number, and a discharge control means for checking the air discharge time and generating an air discharge cutoff signal when the preset air discharge time is exceeded. Quality inspection apparatus comprising a. The method of claim 13, The at least one moving means, A quality inspection apparatus comprising the first conveyor and the second conveyor, wherein a connection member is installed between the first conveyor and the second conveyor, and gear ratios of the gears connected to the ends of each conveyor are different. The method of claim 19, Quality inspection apparatus, characterized in that the target recognition means and the air discharge means is installed on one side of the second conveyor. An orifice having a diameter of 1.8 to 2.2 mm and controlling the air pressure in the middle between the air inlet and the air outlet; A valve installed vertically on one side of the orifice to open and close the orifice; And Solenoids installed in the form of twisting around the valve Solenoid valve structure characterized in that it comprises a. The method of claim 21, A solenoid valve structure, characterized in that the diameter of the air discharge port is 0.8 ~ 1.2mm. The method of claim 21, The air pressure is 4.7 ~ 5.3kg / mm ² solenoid valve structure, characterized in that.