JPH10193227A - Quality checking device for part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide stable accurate part quality checking work for a part with a short leg part. SOLUTION: This device arranges a pair of cone rollers 10 with needle-shaped mutually opposed peripheral surfaces in parallel to tilt a tip end downward, in a tip end of the cone roller 10, a quality checking part 13 is provided, which decides whether a head part height and leg part length of a part 2 are good or bad relating to prescribed dimension only when the part 2 exists. Because of a device height adjustably mounting respectively independently detection part 20, 30, 40 of this good/bad decision part 13, even in a part of screw, bolt, etc., assembling a washer, a part leading to the decision device is in always a stable attitude, accurate good/bad decision of a part can be attained. Further without superposing a part supplied between the cone rollers, the part is supplied having a prescribed space, also without unsteady, even relating to a part with a short leg part, decision work can be surely performed. Even when an objective part is changed, its permissible dimensional range can be easily adjusted, to widen general purpose usability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for simultaneously judging whether the height of a head and the length of a leg, such as a screw, a bolt, a rivet, and the like, are good. The present invention also relates to a good or bad judgment device suitable for judging the quality of a part having a relatively short leg length.

[0002]

2. Description of the Related Art Conventionally, dedicated machines have been used as devices for determining the quality of components. In particular, when determining the quality of components having heads such as screws or pins, for example, a rotary table is used. Separately supply the parts one by one, and determine whether the height of the head, the length of the legs, the shape, etc. are good or bad in order.Alternatively, use a linear feeder instead of this rotary table, The components supplied while the legs are suspended from the feeder are sequentially judged on this feeder.

[0003]

However, in the pass / fail determination device, when parts are supplied to the rotary table, if the delivery timing is not correct when the parts are inserted into the table, the parts bite into the table. Parts are scratched. In the case of a straight feeder, the parts fluctuate and the inspection cannot be performed accurately.
In particular, in the case of screws, bolts, and the like in which this part incorporates a washer, the instability further increases, and there are many that are determined to be defective, and adjustment is difficult. Further, in the case where the components are directly supplied from the supply unit to the rollers, the components are supplied while being entangled with each other, so that it is necessary to lengthen the rollers to separate and align them. Also, parts often spill from the roller when moving from the supply unit to the roller,
There is a major problem, such as that it is time-consuming to put these parts back into the supply unit.

[0004] A first object of the present invention is to solve the above-mentioned problems and to obtain a correct part quality judgment work.
A second object is to enable accurate judgment of the quality of a part with respect to a target part, and a third object is to judge the quality of a part which provides a stable judgment work even for a part having a relatively short leg. It is to provide a device.

[0005]

SUMMARY OF THE INVENTION A first object of the present invention is to:
A pair of conical rollers 10 whose rear ends are rotatably supported, and which are needle-shaped toward the front end and whose front ends are inclined downward so that the peripheral surfaces facing each other are parallel, are disposed. In the vicinity, a quality judgment unit 13 for judging whether the head height and the leg length of the component 2 are good with respect to a predetermined dimension is provided, and the detection units 20 and 3 of the quality judgment unit 13 are provided.
This is achieved by providing a device for judging the quality of components in which the heights 0 and 40 are independently and independently mounted.

The second object is achieved by a configuration in which the quality determining unit determines the presence of the component 2 and outputs a signal for determining the quality of the component 2 only when the component 2 is present. . Further, the third object is that the detection units 20, 30, 4
0, optical sensors 21, 31, 4 comprising a light projecting side and a light receiving side disposed in a direction orthogonal to an extended surface of a gap formed by a conical roller 10 rotatable opposing each other.
1, 53 are achieved.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 4, reference numeral 1 denotes a machine base, to which a supply unit 3 for supplying a component 2 consisting of a head and legs, such as screws, bolts and rivets, is attached. One end of a rectilinear feeder 4 arranged in front is connected to the supply unit 3, and the rectilinear feeder 4 is connected to the machine base 1.
It is almost horizontally fixed. The supply unit 3 and the straight feeder 4 constitute a supply unit. A pair of right and left conical rollers 10 whose tips are inclined downward are disposed at the other end of the straight-ahead feeder 4. As shown in FIG. 6, the conical rollers 10 have parallel and equally spaced gaps. The peripheral surfaces are located opposite to each other. The conical roller 10 is tapered so as to gradually become acicular as it reaches the tip.
The conical roller 10 is rotatably cantilevered by a bearing member 11 on the large diameter side. This bearing member 11
, Motors (not shown) for transmitting the rotation to the conical rollers 10 are fixed, and these motors are configured to rotate in a direction in which the parts 2 between the opposing peripheral surfaces are lifted at different speeds. In this embodiment, the driving of the conical roller 10 is driven by motors having different rotation speeds.
Alternatively, the belt and the pulley may be driven by one motor.

On the other hand, as shown in FIG. 5, the bearing member 11 is mounted on an adjustment table 12 fixed to the machine base 1 so that the height thereof can be adjusted. The height movement can be adjusted in an arc around the center. When the height of the conical roller 10 is adjusted, the supply section 3 and the straight feeder 4 can be adjusted accordingly. Furthermore, this conical roller 1
At the leading end of 0, a good / bad determining unit 13 for determining the height of the head of the component 2 and a good / bad determining unit 13 for determining the length of the leg are arranged on the center line between the facing surfaces of the two conical rollers 10 respectively. Have been
Further, at this position, a removing means 14 for sucking and removing the part determined to be defective here is attached. In front of the conical roller 10, a guide cylinder 1 for guiding the part 2 determined as a non-defective product by the quality judgment unit 13 to a predetermined position.
There are five. A counter 16 for counting the passage of the component 2 is attached to the guide tube 15, and the counted component 2 is guided by the guide tube 15 and enters the case 5 placed on the machine base 1. is there.

Next, a description will be given of the quality judgment section 13 of the head height and leg length of the component 2. FIG. 1 shows that the rear end of the conical roller 10 is higher than the positions shown in FIGS. In the state of being adjusted and positioned downward, the removing means 14
1 and the configuration excluding the guide cylinder 15, and the configuration of the pass / fail determination unit 13 will be described with reference to FIG.

In FIG. 1, a first detecting section 20 comprising an optical sensor 21 is provided immediately above the conical roller 10 near the tip thereof.
The first detection unit 20 is provided at the tip of a first lever 23 which is attached to a first frame 22 which is fixed upright to the machine base 1 so as to be adjustable in height.
As shown in FIGS. 2 and 3, the first lever 23 has a distal end that is open with a front end sandwiching an extended surface of the conical roller 10 with an equally spaced gap.
The first part of the quality judgment unit 13 for judging the quality of the head of
The light projecting side and the light receiving side of the optical sensor 21 as the detecting unit 20 are attached to face each other. The first lever 23 is provided with a first spindle 25 at an upper portion via a first mount 24, and the first spindle 25 is rotatably mounted on the first frame 22 via a first plate 26. By turning the first knob 27, the first lever 23
To move up and down. In addition, the first
A first compression spring 28 is interposed around the spindle between the mounting table 24 and the first plate 26 to provide an elastic force therebetween.

When the leg of the component 2 reaches this position below the first detection unit 20 with the conical roller 10 interposed therebetween, the second detection unit confirms that the component 2 is present at this position. The second detection unit 30 also includes an optical sensor 31 having a light-emitting side and a light-receiving side on both sides of the equally-spaced extended surface of the conical roller 10. The light projecting side and the light receiving side of the optical sensor 31 are fixed to a second mounting base 34 via a second lever 33, and the second mounting base 34 is fixed to the machine frame 1 by a second frame 32 fixed upright. It is mounted to be able to move up and down. The second mount 34 is configured to move up and down via a second spindle 35 connected to a second knob 37 rotatably provided on a second plate 36 fixed to the second frame 32. . A second compression spring 38 is interposed around the spindle between the second mounting table 35 and the second plate 36 to apply elastic force therebetween.

Further, a third frame 42 is fixed upright between the first frame 22 and the second frame 32 of the machine base 1, and the third detection section 3
Below 0, a third mounting base 44 having a third detecting section 40 for detecting whether or not the leg of the component 2 is within a predetermined dimension is mounted to be able to move up and down. The third mounting base 44 is connected to a third knob 47 rotatably provided on a third frame 42 below the third frame 42 via a third plate 46.
It is configured to move up and down via a spindle 45, and the third mounting base 44 has a third lever 43.
Are provided movably in the vertical direction. The third lever 43 is fixed to a fourth mounting base 48, and the fourth mounting base 48 is connected to a fourth knob 50 rotatably provided on the third mounting base 44 via a fourth plate 49. The fourth
It is configured to move up and down via a spindle 51. A third compression spring 52 is interposed around the spindle between the fourth plate 49 and the fourth mounting table 48 to apply elastic force therebetween.

On the other hand, the third detecting section 40 is provided with an optical sensor 41 having a lower limit light projecting side and a light receiving side shown in FIGS. An optical sensor 5 that is located immediately above the table 44 and includes an upper limit light-emitting side and a light-receiving side provided at the tip of the third lever 43.
And 3. The lower limit optical sensor 41 is located at the position of the maximum allowable length for the predetermined length of the leg length of the component 2, and the upper limit optical sensor 53 is located at the position of the minimum allowable length for the predetermined length of the leg length of the component 2. Each is set. The position of each of these optical sensors 41 and 53 is the third position.
By turning the knob 47 and the fourth knob 50 to set the respective height positions, the first, second, and third detection units 2 are set.
0, 30, and 40 are arranged so as to be located on a straight line.

In the device for judging the quality of the component 2 configured as described above, when a start signal is input after the component 2 is supplied to the supply unit 3 shown in FIG. 4, as shown in FIG. 5 and FIG.
The component 2 from the supply unit 3 is supplied to the straight feeder 4.
In the straight feeder 4, the parts 2 are fed forward while being aligned with their heads up, so that the parts 2 are located between a pair of conical rollers 10 that are already rotating at equal intervals. With the legs suspended. At this time, since the conical rollers 10 have been rotated at different rotational speeds in advance, the part 2 entered here is slightly inclined in a certain direction. The inclination of the conical roller 10 is adjusted and fixed in advance so as to move the part 2 at an appropriate speed while keeping the legs suspended from the front, so that the part 2 does not scatter. Flow down.

In this way, as shown in FIG.
Flows down and reaches the determination unit 13 at the tip, the second detection unit 3
If 0, it is confirmed that the component 2 exists at a predetermined position, and a signal is output. Subsequently, the height and length of the head and legs are detected by the first detection unit 20 and the third detection unit 40,
A signal indicating whether the head height of the component 2 is higher or lower than a predetermined value and whether the length of the leg is within the allowable dimension is output, and a good product or a defective product is determined. Here, as shown in FIG.
The parts 2 determined to be non-defective are not supplied with the removal means 14 shown in FIGS. 4 and 5 by the non-defective judgment signal, and are continuously supplied forward in this state to enter the guide cylinder 15. on the other hand,
As shown in FIG. 3, the head height is lower than a predetermined value, or the leg length is shorter or longer than the allowable dimension, or both the head and the leg are not in the predetermined size. For the part 2 determined to be defective for the reason, the removing means 14 is immediately activated by the defective part determination signal, and the part 2 is sucked and removed.

The passing of the part 2 determined to be non-defective is counted by the counting unit 16 in the guide cylinder 15. Then, when the supply number reaches a preset number, the conical roller 10 stops rotating by this signal, so that the supply of the component 2 from the conical roller 10 is stopped. Thereafter, when a new case 5 is prepared below the guide cylinder 15 of the machine base 1 and a start signal is input again, the above operation is repeated, and a predetermined quantity of non-defective parts 2 can be packed in a box. Here, the case 5 is placed below the guide tube 15 and the parts 2 are supplied in a predetermined amount to the case 5, but instead of this, a packaging machine (not shown) is installed,
If a predetermined number of parts are automatically packaged by this packaging machine, it is possible to automate the unified operation from the selection of the parts 2 to the packaging, and to reduce the cost from the sorting of parts to the packaging of the parts. .

[0017]

As described above, according to the present invention, when the component 2 reaches the vicinity of the tip of the conical roller 10, it is determined whether or not the head and the leg of the component 2 have predetermined dimensions. Since the apparatus determines the second non-defective product, it is not necessary to adjust the timing between the apparatuses as in the related art, and the components do not damage the apparatus. In addition, even for components such as screws and bolts in which washers are incorporated, components that have reached the determination position are always in a stable posture, and the quality of components can be accurately determined. Further, since the component quality judgment unit is located at the needle-like tip of the conical roller, the components supplied between the conical rollers are supplied at predetermined intervals without overlapping and do not fluctuate, so that accurate Pass / fail judgment work can be continued. In addition, by arranging this judging unit as far as possible at the tip of the conical roller, the judging operation can be reliably performed even for a part having a short leg. In addition, since the height of each of the detection units constituting the pass / fail determination unit can be adjusted independently, even if the target component is changed, the allowable dimensional range can be easily adjusted and its versatility is wide. Effects can be obtained.

[Brief description of the drawings]

FIG. 1 is an enlarged front view of a main part showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part showing a non-defective product determination state of a part.

FIG. 3 is an enlarged sectional view of a main part showing a defective part determination state of a part.

FIG. 4 is an overall front view showing the embodiment of the present invention.

FIG. 5 is an enlarged front view of a main part of FIG. 4;

FIG. 6 is a plan view of a main part of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Machine stand 2 Parts 3 Supply part 4 Straight feeder 5 Case 10 Conical roller 11 Bearing member 12 Adjustment stand 13 Good / bad judgment part 14 Removal means 15 Guide cylinder 16 Counting part 20 First detecting part 21 Optical sensor 22 First frame 23 First Lever 24 First mount 25 First spindle 26 First plate 27 First knob 28 First compression spring 30 Second detector 31 Optical sensor 32 Second frame 33 Second lever 34 Second mount 35 Second spindle 36 2 plate 37 2nd knob 38 2nd compression spring 40 3rd detection part 41 optical sensor 42 3rd frame 43 3rd lever 44 3rd mounting stand 45 3rd spindle 46 3rd plate 47 3rd knob 48 4th mounting stand 49 4th plate 50 4th knob 51 4th spindle 52 3rd compression spring 53 Optical sensor

Claims (3)

[Claims] 1. A pair of conical rollers 10 having a rear end rotatably supported, a needle-like shape toward a front end, and a front end inclined downward such that peripheral surfaces facing each other are parallel.
Is disposed near the tip of the conical roller 10 to determine whether the head height and the leg length of the component 2 are good for a predetermined dimension. A quality judgment device for parts, wherein the parts 20, 30, and 40 are independently mounted so as to be freely adjustable in height. 2. The configuration according to claim 1, wherein the acceptability determining unit determines the presence of the component, and outputs a signal for determining acceptability of the component only when the component exists. Apparatus for determining the quality of parts. 3. An optical sensor 21 comprising a light projecting side and a light receiving side disposed in a direction perpendicular to an extended surface of a gap formed by a conical roller 10 rotatably opposed to each other. 3. The apparatus according to claim 1, wherein the apparatus is 31, 41, or 53. 4.