KR20160033277A - Bolt inspection device - Google Patents

Abstract

The present invention relates to a defective bolt inspection device, comprising: a bolt supplying part to supply the bolts; a round index structure to arrange a screw part of the bolt in a vertical direction after receiving the bolt from the bolt supplying part, and to rotate the same in a horizontal direction; cameras respectively arranged on three locations which are separated by a lower part of the screw part of the bolt and an axial direction of the bolt, to photograph from entire directions of the screw part of the bolt, when the screw part of the bolt arrives on a predefined location; a lighting apparatus to irradiate lights to the bolts for photographing; and a bolt discharging device to load and discharge the bolts screened as being fair based on the photographed data in the entire directions of the bolt by the camera. According to the present invention, it is possible to discharge a desired number of fair quality bolts for packaging in a box by pushing only a device operation switch by inputting a desired number for packaging after supplying the bolts for inspection to a hopper. In addition, the work efficiency can be improved by continuously discharging the boxes packed with the fair quality bolts by automatically moving the boxes to aside after reaching a certain number of boxes, and overcoming inconvenience to the worker of moving the packaged boxes which may repetitively be discharged in a short time.

Description

[0001] The present invention relates to a bolt inspection device,

The present invention relates to an apparatus for automatically selecting defective bolts.

Screws used for joining and securing parts of machine elements are used in a wide variety of products, from large machines to small electronic products. Screws are generally screwed into a female thread of a base material when tightened, and fasteners are screwed into a bolt through a base material and are usually called bolts in industry.

The production of these bolts is based on the mass production of various types of bolts (especially those with small sizes) in addition to the special bolts produced in small quantities used in special products. In mass production, defects inevitably occur due to aging of the processing machine, malfunction and cumulative error of the machine, and carelessness of the worker.

Currently, most of the bolts are screened based on subjective perceptions and judgments about the defect criteria of workers. This method is suitable for inspecting a small amount of parts in a short time, but there is a limit to a large amount of various kinds of inspection for a long time.

A computer vision inspection system that can be applied to the inspection of a large quantity of such a wide variety of items and can flexibly cope with various types of inspection items is a noncontact type and a real time inspection is most effective. Among them, machine vision is becoming the core of the inspection process, and it is becoming an important point of the manufacturing process by solving various problems such as securing the reliability of test results and replacing high wages.

Machine vision is a technology that obtains image data using electric, optical, and non-contact technology, processes the image, analyzes it, and derives the desired conclusion with minimal help. In recent years, It is actively being applied.

Japanese Patent Application Laid-Open No. 10-1296826 (titled "Good Product Selection Device for Washer Mounting Bolt") is a device for selecting whether or not a bolt is good using machine vision, and is a device for selecting whether or not a washer mounting bolt is good using machine vision A posture correcting device for correcting the posture so as to have the same attitude when the washer mounting bolt reaches a camera of machine vision for sorting good products; And a sorting device for supplying the washer mounting bolt to a camera of a machine vision and separating and discharging a good product and a defective product of the washer mounting bolt according to the judgment of the machine vision, A feeding plate on which grooves are arranged at regular intervals; A guide plate guiding a washer mounting bolt spanning over the groove of the feeding plate and supplied in a rotary manner, and forming a discharging groove for collecting defective articles; A rotating frame coupled to the feeding plate to transmit a rotational force to the feeding plate and having illumination holes for transmitting light through the same at equal intervals as the groove of the feeding plate; A driving device for rotating the rotating frame; And a lighting device mounted on the upper side of the feeding plate, the upper end of which is equipped with a posture correcting device and the lower end of which is accommodated in the rotating frame, wherein the lighting is positioned on the same line as the camera, And an upper plate mounted at an arbitrary point in a line parallel to the upper surface.

Such a good-quality sorting apparatus can simplify the good-quality good-quality determination algorithm of the machine vision for the good quality of the washer-attaching bolt supplied in an irregular posture, and it is possible to reduce the time required for the good- In addition, the washer mounting bolt of the good article is discharged by the discharge guide plate capable of moving in both directions around the rotation axis, so that the box for holding the washer can easily receive the washer mounting bolt. In addition, if there are two boxes for holding the washer-mounting bolts, the effect of holding them as described above is lost, but they can be discharged simultaneously to two boxes. As the time to put in the box increases, .

However, in such a good-quality sorting apparatus, the grooves are formed at regular intervals on the feeding plate so that the bolts to be inspected are vertically erected and passed through the inspection position, and the heads of the bolts are mounted on the grooves to rotate the feeding plates. At this time, the driving device (motor, feeding plate drive, etc.) necessary for rotating the feeding plate is usually installed in the direction of the feeding plate due to the weight problem. As a result, it is difficult to utilize the central space, It is necessary to install it on the outer side of the plate and accordingly, a relatively wide horizontal space is required. In addition, a camera for inspecting the thread can be installed only on the outer side of the feeding plate, and when the view of the feeding plate support and the bolt thread overlap, the thread portion is not displayed.

The camera can be installed only in the index area. If only one camera is used, the bolt thread can not be taken in all directions. In order to take an omnidirectional image, the bolt must be rotated in place. In this case, a separate mechanism for rotating the bolt is required, and the rotation of the bolt causes the inspection time to be delayed.

In addition, because of the purpose of inspecting the thread, it is necessary to install the mechanism necessary for the rotation on the head of the bolt, thereby causing additional interference (disturbance of view of the camera) to the head inspection.

In addition, when the operation of discharging the bolts in a certain quantity of boxes is repeated in a short time, there is a problem that the worker has to perform only the operation of moving the discharged packaging box without performing other activities.

Patent Registration No. 10-1296826 (Date of Publication: August 14, 2013)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a method and apparatus for supplying bolts to be inspected to a hopper, And to provide a defective bolt sorting device which can be discharged in a box.

Another object of the present invention is to provide a method and apparatus for automatically moving a box of a predetermined number of bolts to a side of a box so that a worker can have a margin for performing other operations, And to provide a bad bolt sorting apparatus.

It is a further object of the present invention to provide a camera installation method capable of shortening a bolt inspection time because it is possible to simultaneously photograph all directions of a threaded portion with a plurality of cameras without rotating the bolt, The present invention is to provide a faulty bolt sorting apparatus in which a camera installation space is secured in the lower part by providing a driving device which is an interference to an upper portion of an index.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

The above object of the present invention can be achieved by a bolt supply unit 70 for bolt supply; A circular index device (30) for receiving a bolt from the bolt supply part and horizontally rotating the screw part of the bolt (200) in a vertical direction; When the threaded portion of the bolt 200 reaches a predetermined position, the threaded portion of the bolt 200 is divided into three parts, that is, the lower side of the threaded portion of the bolt 200 and the axial center of the bolt 200 A camera (51, 52, 53) disposed at each point to be imaged; A lighting device 60 for irradiating the bolts 200 with light for photographing the bolts 200; And a bolt discharging device for loading and discharging the selected bolts 200 through the image information of the bolts 200 photographed in all directions by the camera,

The circular index device (30)

An upper plate 22 fixed to an upper end of a plurality of vertically installed upper plate fixing pillars 21;

A driving device mounted on a lower portion of the upper plate 22;

A circular index 33 mounted on a lower portion of the driving device and rotated by a driving device and having a plurality of bolt receiving grooves 33a formed on an outer circumferential surface thereof;

The bolt receiving groove 33a of the circular index 33 is formed by forming an inner circumferential surface opposed to the outer circumferential surface of the circular index 33 and guiding the bolt receiving groove 33a of the circular index 33 to be rotated. 42a and a defective discharge port 42b;

A guide plate fixing post 41 mounted on the lower end of the guide plate 42 and vertically erected to secure a space below the guide plate 42 and the circular index 33 by supporting the guide plate 42; Including,

The drive device

An index drive (32) coupled with the top of the circular index (33) adjacent the periphery of the circular index (33);

And a motor 31 connected to the index drive 32 to rotate the index drive 32,

The bolt discharge device

A box supply part for loading a plurality of boxes and sequentially arranging at least one box at a close position of the good product discharge port 42a for loading the bolts 200 discharged from the good product discharge port 42a;

A bolt dispersing device for dispersing the bolts loaded on the box by applying an impact to the box on which the bolts (200) discharged from the good outlet (42a) are loaded;

A first box discharging unit for discharging the set number of bolts to one side of a table provided on the outside of the box;

And a second box discharging portion for pushing the set number of boxes from the first box discharging portion to the other side of the table when the box is placed on the table.

According to the defective bolt sorter according to the present invention, when a bolt to be inspected is supplied to a hopper, a desired packing quantity is input, and only a proper number of bolts are packed in a box.

In addition, if the operation of discharging a certain quantity in a box is repeated in a short time, the worker needs only to move the discharged box without performing any other activity. Therefore, when a certain amount of box is discharged, So that the box can be continuously discharged and the working efficiency is increased.

In addition, since the index drive unit is installed at the upper part, since the clearance space is generated in the lower part of the index, the installation position of the camera necessary for the thread portion inspection can be freely set, and the condition for not rotating the bolt thread portion in the forward direction can be provided . In addition, there is a space margin in which it is possible to configure the defect determination bolts to be separately discharged after passing the good product discharge position within the same area as the existing equipment. By such a constitution, when the operation of the defective discharge device is failed due to the failure of the parts, the phenomenon that the defective product is discharged and mixed together with the good product is improved.

1 is a plan view of a defective bolt sorter according to the present invention,
Fig. 2 is a side view of Fig. 1,
3 is a plan view showing a circular index device as a main part of a defective bolt sorter according to the present invention,
Fig. 4 is a side view of Fig. 3,
Figs. 5 to 9 are views showing an operation relationship of the defective bolt sorter according to the present invention. Fig.

The apparatus for sorting faulty bolts according to the present invention comprises: a bolt supply unit 70 for supplying bolts; A circular index device (30) for receiving a bolt from the bolt supply part and horizontally rotating the screw part of the bolt (200) in a vertical direction; When the threaded portion of the bolt 200 reaches a predetermined position, the threaded portion of the bolt 200 is divided into three parts, that is, the lower side of the threaded portion of the bolt 200 and the axial center of the bolt 200 A camera (51, 52, 53) disposed at each point to be imaged; A lighting device 60 for irradiating the bolts 200 with light for photographing the bolts 200; And a bolt discharging device for loading and discharging the selected bolts 200 through image information of the bolts 200 photographed in all directions by the camera.

Here, the circular index device includes an upper plate 22 fixed to the upper ends of a plurality of vertically erected upper plate fixing posts 21; A driving device mounted on a lower portion of the upper plate 22; A circular index 33 mounted on a lower portion of the driving device and rotated by a driving device and having a plurality of bolt receiving grooves 33a formed on an outer circumferential surface thereof; The bolt receiving groove 33a of the circular index 33 is formed by forming an inner circumferential surface opposed to the outer circumferential surface of the circular index 33 and guiding the bolt receiving groove 33a of the circular index 33 to be rotated. 42a and a defective discharge port 42b; A guide plate fixing post 41 mounted on the lower end of the guide plate 42 and vertically erected to secure a space below the guide plate 42 and the circular index 33 by supporting the guide plate 42; .

The drive also includes an index drive (32) coupled with the top of the circular index (33) adjacent the periphery of the circular index (33); And a motor 31 connected to the index drive 32 to rotate the index drive 32.

The bolt discharging device 80 has a plurality of boxes 300 mounted thereon and at least one box is disposed at a position close to the good output port 42a for loading the bolts 200 discharged from the good output port 42a A box supply section 85 for sequentially arranging the box; A bolt dispersing device 83 for dispersing the bolts loaded on the box by applying an impact to a box on which the bolts 200 discharged from the good outlet port 42a are loaded; A first box discharging portion for pushing the table 92 to one side of the table 92 provided on the outside when the set number of bolts is loaded on the box; And a second box discharging part for pushing the set number of boxes from the first box discharging part to the other side of the table 92 when the box is placed on the table 92.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

The bad bolt sorting apparatus of the present invention includes a bolt supply unit 70, a circular index apparatus 30, cameras 51, 52 and 53, a lighting apparatus 60 and a bolt discharge apparatus 80.

The bolt feeder 70 is configured to feed the bolt 200 to the circular indexing device 30 and may be constituted by a hopper 71, a ball feeder 72, and an inline feeder 73. The hopper 71 accommodates a large amount of bolts 200 and supplies the bolts 200 to the ball feeder 72. The ball feeder 72 feeds the supplied bolts 200 one by one to the inline feeder 73, And the inline feeder 73 is inclined toward the circular indexing device 30 to supply the bolt 73 to the circular indexing device 30 by gravity.

The circular indexing device 30 is configured to receive the bolts 200 from the bolt supply part 70 and to horizontally rotate the screw parts of the bolts 200 in the vertical direction, A driving device mounted on a lower portion of the upper plate 22 and rotated by a driving device mounted on a lower portion of the driving device and having a plurality of bolt receiving grooves 33a formed on an outer circumferential surface thereof, And an inner circumferential surface opposed to the outer circumferential surface of the circular index 33 is formed to guide the bolt receiving groove 33a of the circular index 33 to be rotated and the inner circumferential surface of the bolt- A guide plate 42 provided with a good article discharge port 42a and a poor discharge port 42b communicating with the guide plate 42a and communicating with the guide plate 42. The guide plate 42 is vertically installed at the lower end of the guide plate 42, (42) and the circular index (33) And a guide plate fixing post 41 for securing a space.

In the present invention, a space S is formed under the circular index 33 by providing a driving device for rotating the circular index 33 on the circular index 33, and three cameras 51, 52 and 53 are provided so that the entire direction of the threaded portion of the bolt 200 can be inspected without rotating the bolt 200.

Therefore, the driving device is mounted on the lower portion of the upper plate 22 fixed to the upper end of the vertically erected upper plate fixing posts 21. The drive device includes an index drive 32 coupled with the top of a circular index 33 adjacent the circumference of the circular index 33 and a motor (not shown) coupled to the index drive 32 to rotate the index drive 32 31). The index drive 32 combines with the circular index 33 as widely as possible to prevent vibration and the like.

A guide plate fixing post 41 is mounted on the lower end of the guide plate 42. The guide plate fixing post 41 is mounted on the lower end of the guide plate 42 and stands upright to support the guide plate 42, So that a space can be secured in the lower part of the plate 42 and the circular index 33.

The cameras 51, 52 and 53 are seated in the bolt receiving grooves 33a so that when the screw portion of the bolt 200 arranged in the vertical direction reaches the position determined by the driving device, The guide plate 42 and the circular index 33, which are divided into three parts with respect to the axial center of the bolt 200,

The illumination device 60 is provided below the guide plate 42 and the circular index 33 to irradiate light toward the threaded portion of the bolt 200.

The bolt discharging device 80 is configured to discharge and discharge the good quality bolts 200 through the image information of the bolts 200 photographed in all directions by the cameras 51, 52 and 53, A box supply part 85 for sequentially arranging at least one box at a position close to the good outlet 42a for loading the bolts 200 loaded with the good products 300 and the good products discharged from the good outlet 42a, A bolt dispersing device 83 for impacting a box loaded with the bolts 200 discharged from the discharge port 42a and dispersing the bolts loaded on the box, And a second box discharging portion for pushing the table 92 to the other side of the table 92 when the set number of the boxes is located on the table 92 .

The box supply section 85 is configured to arrange one of the plurality of vertically stacked boxes 300 at a position close to the good article discharge port 42a of the circular index device 30, When the box 300 is supplied to the vicinity of the good article discharge port 42a of the circular index device 30, there is a difference in distance between the box 300 and the good article discharge port 42a, 200) to the box (300). The guide unit 81 guides the bolt 200 to the box 300 and rotates to the left and right so that the bolt 200 can be evenly loaded on the box 300. In addition, the bolt dispersing device 83 is provided on the lower side of the box 300 to intermittently impact the box 300 to allow the bolt 200 to be evenly loaded on the box 300, Prevent loading bias phenomenon.

The first box discharging portion 82 may be configured by a hydraulic cylinder or the like in such a manner that the first box discharging portion 82 is pushed to one side of the table 92 when the preset amount is stored in the box 300.

The second box discharging portion is configured to push the box 92 from the first box discharging portion 82 to the other side of the table 92 when the set number of boxes 300 are positioned on one side of the table 92, A support bar 91a connected to the push bar 91 and an arm screw 94 connected to the support bar 91a which are moved along the guide groove 92a and connected to the arm screw 94, A water screw 95 provided in parallel with the guide groove 92a of the screw 92 and a motor 93 for rotating the water screw 95.

1 to 9, when a large amount of bolts 200 is supplied to the hopper 71, the ball feeder 72 and the in-line feeder 73 form circular Are vertically mounted one by one in the bolt receiving grooves 33a of the circular index 33 of the indexing device 30. [

Since the circular index 33 repeats the rotation and stop by the driving device continuously for the set time, the bolt 200 that has been mounted reaches the inspection section (the section taken by the cameras 51, 52 and 53). After the bolts 200 reached the inspection period are inspected by the cameras 51, 52 and 53, the bolts 200 judged as good are discharged to the good outlet 42a, (42b). That is, the bolt 200 is guided and moved by the rotation of the circular index 33 and the inner circumferential surface of the guide plate 42, and then the bolt 200 is moved to the position where the inspection is performed (the point at which the three cameras 51, Once positioned, all directions of the threaded portion of the bolt 200 are photographed through the three cameras 51, 52, and 53, which are part of the configuration of the vision system, and based on this, a good quality determination of the bolt 200 is made through the vision system And is discharged to the good discharge port 42a or the bad discharge port 42b in accordance with the determination.

Air is used to move the bolts 200 from the bolt receiving grooves 33a to the good outlet 42a or the bad outlet 42b.

The bolts 200 discharged through the air outlet 42a are accommodated in the box 300. At this time, the guide to the box 300 is performed through the guide portion 81. [ The guide part 81 is pivotable left and right so as to guide the bolt 200 to the left side of the box 300 after the set time has passed and guides the bolt 200 to the right side of the box 300, Further, the bolt dispersing device 83 of the present invention can evenly apply the bolts 200 by impacting the lower side of the box 300 in order to further reduce the biased loading of the bolts 200.

The first box discharging portion 82 composed of a hydraulic cylinder or the like is pushed to one side of the table 92 when the preset amount is contained in the box 300. When the box 300 is placed at the discharge position of the bolts 200 by the next box supply unit 85 and the good 300 is filled with the good quality bolts 200 as described above, Is positioned at one side of the table (92) side by side with the box pushed away from the first side (82).

The second box ejector 82 then pushes out the two boxes 300 to the other side of the table 92 and leaves the at least two boxes 300 vacant for further ejection to one side of the table 92 .

Therefore, according to the present invention, when a bolt to be inspected is supplied to a hopper, a desired quantity of wrapping is input, and then only a bolt of a good product is poured into a box by simply pressing a facility operation button. It is possible to eliminate the inconvenience that the worker has to perform only the operation of moving the discharged packaging box without performing other activities, and the work efficiency is increased.

In addition, the present invention is characterized in that when the bolt 200 is positioned at the inspection point, the cameras 51, 52, 53 of the vision system, which photographs the lower end of the bolt 200, It is possible to take an image of all the lower portions of the bolt 200 so that the inspection can be performed without rotating the bolt 200. This allows the bolt 200 to be rotated So that the rotation time of the bolt 200 is shortened and the productivity is improved.

The installation of three cameras for photographing the lower part of the bolt 200 is possible because the space S is secured under the circular index 33 by installing the driving device on the circular index 33. [

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications, and variations will readily occur to those skilled in the art without departing from the spirit and scope of the invention. Therefore, it should be understood that the disclosed embodiments are to be considered in an illustrative rather than a restrictive sense, and that the true scope of the invention is indicated by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof, .

21: Fixing column of roof
22: Top plate
31: Motor
32: Index drive
33: Circular index
33a: Bolt seat groove
41: Guide plate fixing column
42: guide plate
42a:
42b: Bad outlet
51, 52, 53: camera
60: Lighting device
70: Bolt supply part
80: bolt discharge device
200: Bolt
300: box

Claims (4)

A bolt supply part 70 for bolt supply;
A circular index device (30) for receiving a bolt from the bolt supply part and horizontally rotating the screw part of the bolt (200) in a vertical direction;
When the threaded portion of the bolt 200 reaches a predetermined position, the threaded portion of the bolt 200 is divided into three parts, that is, the lower side of the threaded portion of the bolt 200 and the axial center of the bolt 200 A camera (51, 52, 53) disposed at each point to be imaged;
A lighting device 60 for irradiating the bolts 200 with light for photographing the bolts 200;
A bolt discharge device 80 for loading and discharging the selected bolts 200 through the image information of the bolts 200 photographed in all directions by the camera;
And a defective bolt separator.
The method according to claim 1,
The circular index device (30)
An upper plate 22 fixed to an upper end of a plurality of vertically installed upper plate fixing pillars 21;
A driving device mounted on a lower portion of the upper plate 22;
A circular index 33 mounted on a lower portion of the driving device and rotated by a driving device and having a plurality of bolt receiving grooves 33a formed on an outer circumferential surface thereof;
The bolt receiving groove 33a of the circular index 33 is formed by forming an inner circumferential surface opposed to the outer circumferential surface of the circular index 33 and guiding the bolt receiving groove 33a of the circular index 33 to be rotated. 42a and a defective discharge port 42b;
A guide plate fixing post 41 mounted on the lower end of the guide plate 42 and vertically erected to secure a space below the guide plate 42 and the circular index 33 by supporting the guide plate 42;
And a defective bolt separator.
3. The method of claim 2,
The drive device
An index drive (32) coupled with the top of the circular index (33) adjacent the periphery of the circular index (33);
A motor 31 connected to the index drive 32 to rotate the index drive 32;
And a defective bolt separator.
The method according to claim 2 or 3,
The bolt discharge device (80)
A box supply part 85 for sequentially placing at least one box at a position close to the good outlet port 42a for loading the bolts 200 to be discharged from the good outlet port 42a, )Wow;
A bolt dispersing device 83 for dispersing the bolts loaded on the box by applying an impact to a box on which the bolts 200 discharged from the good outlet port 42a are loaded;
A first box discharging portion for pushing the table 92 to one side of the table 92 provided on the outside when the set number of bolts is loaded on the box;
A second box discharging portion for pushing the set number of boxes from the first box discharging portion to the other side of the table 92 when the box is located at one side of the table 92;
And a defective bolt separator.

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