KR100249433B1 - Weight checking apparatus and method for parts - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

The present invention relates to an apparatus for sorting out defective parts by continuously measuring various parts such as bearings.

I. The technical problem that the invention is trying to solve

The present invention provides a component defect inspection apparatus capable of precise weighing while improving processing speed without using a conveyor belt with high power consumption.

All. Summary of Solution of the Invention

The present invention provides a device for inspecting defective parts, the body of the apparatus is provided with a control unit for the operator to operate the device and a display unit for displaying the weight value of the parts in place, the upper end of the main body width Adjustable, a sensor for detecting the presence or absence of parts in the inner place is installed, a pair of side guides are installed to have a constant inclination in the longitudinal direction, the side guides to support the flow of parts between the side guides The first lower rail, the second lower rail and the third lower rail are respectively installed in the longitudinal direction at a predetermined interval so as to have a corresponding inclination angle, and the parts flowing by the inclination angle are temporarily stopped in place of the first lower rail. In order to form a latching jaw, and in the middle of the locking jaw to catch the parts caught by the locking jaw upward A pushing device is installed to push, a load cell is installed between the first lower rail and the second lower rail to measure the weight of the part, and the upper part of the load cell has a second lower rail. The second lower rail and the third lower rail are respectively installed at equal intervals so as to be rotatable on a predetermined circular plate in order to stop the parts flowing by the pushing device at the same time and at the front of the load cell. Between is characterized in that the sorting unit is installed to sort the parts by the weighing value measured by the load cell.

la. Important uses of the invention

The present invention is a device for inspecting the defect of various components.

Description

Component defect inspection device and method

The present invention relates to an apparatus for sorting out defective parts by continuously measuring various parts such as bearings, and more particularly, to a component failure inspection apparatus and method having a structure capable of precisely measuring the weight of components while increasing the processing speed. .

In general, parts such as bearings inspect their appearance to screen out defective products, but may sort out defective parts by trace or excess by their own weight. As described above, the apparatus for sorting whether a part is defective by weight is racing against each other to improve processing speed and weighing accuracy.

1 is a front view of a component failure inspection apparatus according to an embodiment of the prior art, Figure 2 is a plan view of the component failure inspection apparatus.

Conventional parts failure inspection apparatus, as shown in Figures 1 and 2, the introduction part 10 for placing the parts after entering, the metering unit 20 for measuring the weight of the parts conveyed from the introduction portion and the metering It is composed of a sorting unit 30 for sorting the parts of excess, trace amount and quantity according to the value measured in the department.

Conveyor belts 11, 21, and 31 for conveying parts according to the purpose are installed in the introduction part 10, the metering part 20, and the sorting part 30, respectively. The drive motor 12 and the timing belt 13 advance in a predetermined direction (arrow direction).

A compression type load cell 22 is installed below the conveyor belt 21 of the metering unit 20 in order to measure the weight of the parts transferred from the introduction unit 10. In the description of the load cell, a deformation gauge for converting deformation (torsion) into electrical resistance is installed around a forced cylinder, and when a load is applied, deformation occurs in proportion to the stress, and according to the deformation, The output voltage changes due to the change of the electrical resistance, and the voltage value is converted into a digital electric signal to directly display the load of the object numerically.

In addition, the display unit 23 equipped with a control unit for displaying the load measured by the load cell 22 so that the operator can see in place of the metering unit 20, and controls the operation of the sorting unit in the next step is installed in place.

On the left and right sides of the conveyor belt 31 of the sorting unit 30, the sorting levers 32 and 33 for sorting parts to one side or the other side, respectively, are provided in the case of a small amount or excess. That is, the parts placed on the introduction part 10 are transferred to the weighing part 20 and weighed by the load cell 22. If the weight of the weighed parts does not match the range of the quantitative value set on the display part 23 by the operator, the sorting part It is transferred to 30 is to be sorted by the sorting lever 32, 33 of one side or the other side.

However, the component defect inspection apparatus as described above uses a plurality of drive motors to drive the conveyor belt, which leads to an increase in power consumption and manufacturing cost, and precise weighing by the load cell because the component weight is measured on the driven conveyor belt. There was a hard problem getting it. In addition, when the conveyor belt is paused in order to obtain a precise weighing value of the parts by the load cell in the metering unit, there is a problem that the processing speed is lowered. In addition, since the conveyor belt is composed of a constant width, a problem arises that the size can not be adjusted according to the component to be weighed.

An object of the present invention to solve the above problems is to provide a component failure inspection apparatus that does not use a conveyor belt with high power consumption.

Another object of the present invention is to provide a component defect inspection apparatus capable of precise measurement while improving the processing speed.

Another object of the present invention to provide a component failure inspection apparatus that can be adjusted in width in accordance with the size of the supplied component.

In order to achieve the above object, the present invention provides a device for inspecting defective parts, the body of the device is installed in place the operator for operating the device and the display unit for displaying the weight value of the parts in place The width of the main body is mutually adjustable, and a sensor for detecting the presence or absence of a component is installed at an inner place, and a pair of side guides are installed to have a constant inclination in the longitudinal direction, and the side guides flow. The first lower rail, the second lower rail and the third lower rail are respectively installed in the longitudinal direction at a predetermined interval so as to have an inclination angle corresponding to the side guide so as to support the parts, and in place of the first lower rail at the inclination angle. A locking jaw is formed to temporarily stop a component flowing by the locking jaw, and the locking jaw is formed at the center of the locking jaw. Pushing device is installed to push the parts caught by the upper one by one, a load cell is installed between the first lower rail and the second lower rail to measure the weight of the parts, and the load cell above the load cell A plurality of blades are respectively installed at equal intervals so as to be rotatable on a predetermined circular plate in order to send the metered parts to the second lower rail direction and to temporarily stop the parts flowing by the pushing device in front of the load cell. A sorting part is installed between the second lower rail and the third lower rail to sort the parts by the weighing value measured by the load cell.

1 is a front view of a component failure inspection apparatus according to an embodiment of the prior art.

2 is a plan view of a component failure inspection apparatus according to an embodiment of the prior art.

3 is a front view of a component failure inspection apparatus according to an embodiment of the present invention.

4 is a plan view of a component failure inspection apparatus according to a preferred embodiment of the present invention.

5 is a side view of a component failure inspection apparatus according to an embodiment of the present invention.

6 is an exploded perspective view of a component bushing device in accordance with a preferred embodiment of the present invention.

7 is a perspective view of a component pushing device according to an embodiment of the present invention.

8 (a) is a plan view of a component pushing device for lifting a large component according to a preferred embodiment of the present invention.

8 (b) is a plan view of a component pushing device for raising a small component according to a preferred embodiment of the present invention.

9 is a flow chart of a component failure inspection apparatus according to a preferred embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

100: main body 202: side guide

206: detection sensor 302: first lower rail

304: second lower rail 306: third lower rail

400: pushing device 404: driving motor

408: circular cam 410: wheat plate

412: guide plate 502: load cell

506 blade 600: sorting unit

602: first selection lever 604: second selection lever

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used for the same components, even if displayed on different drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

3 is a front view of a component failure inspection apparatus according to a preferred embodiment of the present invention, FIG. 4 is a plan view of a component failure inspection apparatus, and FIG. 5 is a side view of the component failure inspection apparatus.

According to the component defect inspection apparatus according to the present invention, as shown in FIGS. 3 to 5, the main body 100 of the apparatus displays an operation unit 102 for the operator to operate the apparatus and a display unit 104 for displaying the weight value of the component. Is installed in place. Thereafter, a pair of side guides 202 for guiding the part 700 to be weighed is installed in the longitudinal direction above the main body. The side guide 202 is installed to have a constant inclination angle in order to allow the component 700 to flow automatically. In addition, a plurality of gap adjusting knobs 204 are installed in place of the side guide 202 in order for the operator to adjust the width according to the type of the part.

Then, between the side guides 202, the first lower rail 302, the second lower rail 304 and the third lower rail 306, which serve as a pedestal of the moving parts, are installed at regular intervals. The first, second, and third lower rails 302, 304, and 306 are installed to have an inclination angle corresponding to that of the side guide 202.

Thereafter, in place of the first lower rail 302, a latching jaw 302a for pausing the component flowing by the inclination angle is formed. On the front side of the locking step 302a, a detection sensor 206 for detecting whether the parts 700 to be mounted is mounted is installed in place. Thereafter, a pushing device 400 is installed at the lower side of the locking step 302a to lift the locking parts one by one by the locking step 302.

6 is an exploded perspective view of a component pushing device according to an exemplary embodiment of the present invention, and FIG. 7 is a combined perspective view of the component pushing device. 8 (a) is a plan view of a component pushing device for raising a large part according to an embodiment of the present invention, and FIG. 8 (b) is a plan view of a component pushing device for raising a small part.

The configuration of the pushing device will be described with reference to FIGS. 6 to 8 (b) as follows.

First, a circular cam seating hole 402 of a predetermined size is formed below the locking step 302a of the first lower rail 302. Thereafter, a driving motor 404 is mounted on the other side of the first lower rail 302, and a coupling 406 having a predetermined size penetrates the circular cam seating hole 402 in the driving motor 404. A circular cam 408 is rotatably installed at the coupling 406, and a protrusion 408a is formed to protrude to a predetermined size on a rotation surface of the circular cam 408. Thereafter, the rotating surface of the circular cam 408 is provided with a compact plate 410 having a guide slit 410a of a predetermined length into which the protrusion 408a can be inserted. That is, when the circular cam 408 is rotated, the mill 410 is configured to move up and down by the rotation of the protrusion 408a. Thereafter, the guide plate 412 in which the guide groove 412a is formed to be seated and guided up and down is installed by fastening the screw 414 to the first lower rail 302. That is, the pushing device 400 is a circular cam 408 coupled to the driving motor 404 fixed to the other side of the first lower rail 302, the mill 410 is installed on the circular cam, and the guide plate 412 for guiding the mill plate It is fixed to the first lower rail 302. In addition, the long holes 412b of a predetermined length are formed on the left and right sides of the guide plate 412 so that the position can be adjusted when the screw 414 is fastened to the first lower rail 302. That is, as shown in FIGS. 8 (a) and 8 (b), the guide plate 412 is fixed in the A direction when measuring a large part, and fixed in the B direction when a small part is measured. In addition, the pushing device 400 is configured to move up and down step by step by a sensor (not shown) to press the parts caught by the locking step 302a upward.

Thereafter, a load cell 502 is installed between the first lower rail 302 and the second lower rail 304 to measure the part 700 flowed by the pushing device 400. On the upper side of the load cell 502, a plurality of blades 506 are installed at regular intervals on a uniform circular plate 504 in order to temporarily stop the components flowd by the pushing device 400 to supply the load cells 502 one by one. For example, when the blade 506 is installed in four places, the circular plate 504 is installed at intervals of 90 degrees. The circular plate 504 is rotated by the drive motor 508, the rotation of the circular plate is configured to rotate by the distance between the blade and the next blade by a sensor not shown. That is, the rotation of the blade 506 serves to supply the component 700 to be weighed on the front side of the blade to the load cell 502 and to flow the component metered by the load cell 502 to the next step.

Thereafter, between the second lower rail 304 and the third lower rail 306, a sorting unit 600 for determining a weight of the component 700 measured by the load cell 502 and selecting defective parts is configured. The sorting unit 600 includes a first selection lever 602 that operates when the metered part is excessive, and a second selection lever 604 that operates when the metered part is too small. Each of the sorting levers 602 and 604 is installed so that one side is opened by the hinge movement by the solenoid. In addition, the first selection pipe 606 and the second selection pipe 608 are connected to the lower side of the device so that defective parts can be guided to the lower sides of the selection levers 602 and 604. For example, when the weight of the part is determined to be excessive by the weighing of the load cell, the first selection lever is opened upward, and the excess part is passed through the first selection pipe installed below the first selection lever. To be classified. In addition, when the parts weighed by the load cell is determined to be quantitative, the respective sorting levers 602 and 604 do not operate, and thus the quantitative parts are classified as the quantitative parts through the third lower rail 306.

In addition, when the operator reaches the count value of the defective parts input to the operation unit 102 of the main body 100, the meter automatically terminates the weighing operation, and installs a warning light 106 in place so that the operator can easily recognize.

9 is a flowchart of a component failure inspection apparatus according to an exemplary embodiment of the present invention.

In the operation of the present invention, as shown in FIG. 9, the control unit (not shown) of the main body checks whether the component is supplied by the sensing sensor installed in the guide (902).

Thereafter, in step 904, the blade of the circular plate is rotated by a predetermined angle. As in step 906, the pushing plate of the pushing device is vertically moved once by the rotation of the driving motor. At this time, the blade is to transfer the parts located in the load cell to the selection unit and at the same time serves to pause the other parts pushed up by the pushing device on the front side of the load cell.

Thereafter, in step 908, the component supplied by the blade is metered.

Thereafter, the controller compares the measured value of the weighed part with the set value set by the operator in step 908 and selects the weighed part according to the comparison result, and returns to step 902. Perform.

In step 910, if the measured value is greater than the upper limit value, the first step of returning to step 902 after operating the first selection lever in step 912; and in step 914, the set value is the set value. If the value is less than the lower limit value, the first selection lever and the second selection when the second step returns to step 920 after the operation of the second selection lever in step 916 and the weighing value exists between the upper limit value and the lower limit value. The third step is to return to step 902 without operating the lever.

In addition, when the component supplied in step 902 is not detected, the process returns to the start step of detecting the component.

In addition, since the first and second stages of the screening process are screening for defective parts, the operator operates a control unit (not shown) of the main body to reach a randomly set count value according to the number of screening of the defective parts. You can add a procedure to end the weighing operation. That is, in step 916, after the operation of the second selection lever is performed, step 918 of increasing the value of N to 1 and step 920 of performing the step 918 of comparing the N value with the L value are performed. do. In this case, when the N value is greater than the L value in step 920, the operation of the apparatus is terminated by performing step 924. On the contrary, when the N value is smaller than the L value, the operation returns to step 902.

At this time, N value is determined as the number of times that the first step or the second step in the screening step, and L value is set to the defective count value arbitrarily set by the operator.

For example, if the L value is selected five times, if the defective part occurs more than five times during the above process, the weighing operation of the device is automatically terminated, and the elapsed light is turned on for the operator to recognize it. It becomes.

In addition, after performing step 914 and not performing step 916, after clearing the N value of step 922 to 0 and returning to step 902, when the defective part count value set by the operator occurs continuously. It is possible to terminate the weighing operation of the device.

As described above, the component defect inspection apparatus according to the embodiment of the present invention has the effect of reducing the power consumption to the minimum because the component flows using the inclination angle without using a separate conveyor belt. In addition, since it consists of a pushing device for vertical movement once and a blade for supplying the parts supplied by the pushing device to the load cell one by one, there is an effect that it is possible to accurately weigh the defective parts while at the same time weighing. In addition, since both side guides can be adjusted by the gap adjusting knob according to the size of the parts to be supplied, there is an effect that can prevent the malfunction of the device to the maximum.

Claims (8)

An apparatus for inspecting defective parts, the apparatus main body of which is provided with an operation part for the operator to operate the apparatus and a display part for displaying the weight value of the parts in place; The upper end of the main body is mutually adjustable width, the sensor for detecting the presence or absence of parts in the inner place is installed, a pair of side guides are installed to have a constant slope in the longitudinal direction; A first lower rail, a second lower rail, and a third lower rail are installed in the longitudinal direction at intervals between the side guides so as to have a corresponding inclination angle with the side guides so as to support the moving parts; A locking jaw is formed in place of the first lower rail to temporarily stop a component flowing by the inclination angle, and a pushing device is pushed in the center of the locking jaw to push the components caught by the locking jaw upward. Install; A load cell is installed between the first lower rail and the second lower rail in order to measure the weight of the component, and an upper side of the load cell sends the component measured in the load cell in the direction of the second lower rail and simultaneously to the pushing device. Installing a plurality of blades at equal intervals so as to be rotatable on a predetermined circular plate so as to temporarily stop the moving parts in front of the load cell; And a sorting part is installed between the second lower rail and the third lower rail to sort the parts by the weighing value measured by the load cell. According to claim 1, wherein the pushing device is a circular cam having a projection rotated by a drive motor, and a mill plate formed in place with a guide slit for inserting the projection of the circular cam and the plate is seated on the Guide plate formed with a guide groove for guiding the up and down flow of the mill according to the rotation is installed, the component defect inspection device, characterized in that the position is adjusted by screwing in the center of the locking jaw of the first lower rail. The apparatus of claim 1, wherein the plurality of blades are installed at equal intervals, and the circular plate is configured to rotate by an angle formed by the blade and the next blade by a driving motor. The method of claim 1, wherein the sorting unit is installed side by side so that the first sorting lever and the second sorting lever are selectively opened by the solenoid, respectively, according to the kind of the defective parts measured by the load cell. Component defect inspection device characterized in that. A guide having a predetermined inclination to which a part can be caught in place, a detection sensor for detecting a part installed and supplied at a side surface of the guide, a pushing device for pushing up a part located at the part to hang; A circular plate having a load cell for metering the supplied parts, a plurality of blades for supplying parts to the load cell, and a first selection lever and a second selection lever for sorting the parts conveyed by the blades; A component defect inspection method of a device comprising a sorting unit, comprising: a first process of inspecting whether a component is supplied through the detection sensor; A second step of supplying the part to the load cell by rotating the blade at a predetermined angle and vertically moving the pushing device once when detecting the part supplied by the first step; A third step of measuring the weight of the component supplied by the second step; And a fourth process of comparing the weighed value measured by the third process with a set value set by an operator, classifying the weighed part according to the comparison result, and returning to the first process. Component defect inspection method. 6. The method of claim 5, wherein the fourth process comprises: a first step of operating the first selection lever and returning to the first process when the measured value is greater than an upper limit among the set values; A second step of operating the second sorting lever and returning to the first process when the measured value is smaller than a lower limit of the set values; And a third step of returning to the first process without operating the first and second selection levers when the measured value exists between the upper limit value and the lower limit value. 7. The method of claim 6, further comprising the step of ending the weighing operation of the apparatus when it is determined that the first step or the second step has been performed a number of times set by an operator. 7. The component defect inspection of claim 6, further comprising the step of terminating the weighing operation of the apparatus when it is determined that the first step or the second step is continuously performed a number of times set by an operator. Way.