JPH10216641A - Sorter and sorting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sorter which is compact, inexpensive and easy to use and a sorting method therefor. SOLUTION: This sorter 1 is constituted to sort shaft parts having head parts and shaft parts and varying in diameters along an axial direction or parts having a spherical shape and the sorting method is for the sorter. The sorter 1 has an inner ring 10 which has the center of rotation, a first supporting member 20 which freely rotatably supports the inner ring, a first rotating means 30 which rotates the inner ring, an outer ring 40 which is arranged on the outer side of the inner ring by offcentering the center of rotation from the center of rotation of the inner ring and forms a spacing S for sorting the parts with the inner ring to each other, a second supporting member 50 which freely rotatably supports the outer ring, a second rotating means 60 which rotates the outer ring, a supply rate adjusting means 70 which adjusts the many parts supplied onto the inner ring so as to supply these parts to the spacing at the prescribed rate and a guiding means 80 which guides the many part supplied onto the inner ring to the supply rate adjusting means 70 by utilizing the rotation of the inner ring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sorting apparatus and a sorting method for sorting shaft parts and spherical parts.

[0002]

2. Description of the Related Art Conventionally, as a sorting device for sorting a shaft component or a spherical component having a head portion and a shaft portion and having different diameters along the axial direction, for example, two rollers are arranged in an axial direction. There has been known a roller sorter in which a plurality of rollers are arranged substantially in parallel at predetermined intervals so as to gradually spread. In this sorter, while rotating two rollers, a part such as a screw to be sorted is sent from the narrower one and the parts are moved in the longitudinal direction along the rollers, and the gap between the two rollers is an allowable error. A screw head having a predetermined diameter range is selected in a portion that is a specific range considered.

[0003]

By the way, since the roller sorter sorts parts using rollers,
The rollers need some length. For this reason, there is a problem that the roller sorter is increased in size corresponding to the length of the roller, requires a large installation space, and is inconvenient to use. In addition, in the roller sorting machine, in order to supply parts such as screws between the rollers, it is necessary to arrange the parts to be sorted in advance so as to be easily supplied between the rollers,
A separate device for alignment was required, and a cost increase was inevitable.

[0004] The present invention has been made in view of the above points, and has as its object to provide a compact, inexpensive and easy-to-use sorting apparatus and method.

[0005]

According to the present invention, there is provided a sorting apparatus for sorting a shaft part or a spherical part having a head part and a shaft part and having different diameters along an axial direction. An inner ring having a center of rotation, a first support member for rotatably supporting the inner ring, first rotating means for rotating the inner ring, and a rotation center for rotating the inner ring outside the inner ring. An outer ring which is arranged eccentrically with respect to a center and forms a clearance for component selection with the inner ring;
A second support member for rotatably supporting the outer ring, a second rotating means for rotating the outer ring, and a supply for adjusting the plurality of components supplied on the inner ring to be supplied to the gap by a predetermined amount. An amount adjusting means and a guide means for guiding the plurality of components supplied on the inner ring to the supply amount adjusting means using rotation of the inner ring are provided.

[0006] Preferably, the first support member is provided on a first base. Also preferably, the second support member is mounted on a second base, and the second base is slidable relative to the first base in an eccentric direction of a rotation center of the outer ring. More preferably, a configuration is provided in which the second base is provided with fixing means for guiding the second base in the sliding direction with respect to the first base and fixing the second base to the first base.

[0007] Preferably, the inner race and the outer race have a curved cross section along the radial direction of the outer peripheral portion and the inner peripheral portion facing each other. Preferably, the second rotating means rotates the outer ring at a different peripheral speed in the same direction as the inner ring.
More preferably, the supply amount adjusting means includes a first roller disposed in the vicinity of the gap and a second roller radially inward of the first roller and downstream of the inner ring in a rotation direction of the inner ring. It is configured to have rollers.

[0008] Preferably, the supply adjusting means is provided with the first
Interval adjusting means for adjusting the interval between the first roller and the second roller. According to the selection method of the present invention, in order to achieve the above object, a method for selecting a shaft part or a spherical part having a head and a shaft part and having different diameters along the axial direction, The inner ring and the outer ring whose rotation centers are slightly deviated are respectively rotated at different peripheral speeds in the same direction, and the shaft part or the spherical part is separated from the inner ring and the outer ring by a gap formed between the inner ring and the outer ring. In this case, a point contact is made between the two and a selection is made while rotating.

Preferably, the shaft part or the spherical part is selected based on a maximum diameter portion.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described in detail with reference to FIGS. The sorting device 1
As shown in FIGS. 1 to 4, the inner race 10, the first support member 2
0, first rotating means 30, outer ring 40, second support member 50,
Second rotating means 60, supply amount adjusting means 70 and guiding means 8
0, a head part and a shaft part, and a shaft part such as a screw or a spherical part such as a steel ball having different diameters along the axial direction are selected based on the maximum diameter part. The sorting device 1
A start / stop operation is performed by a switch (not shown).

The inner ring 10 is a disc-shaped member having an opening 10a (see FIG. 4) formed in the center thereof for attachment to the first support member 20, and has a rotation center CI (see FIG. 11). The first support member 20 rotatably supports the inner ring 10 and is installed on the inner ring base 2 as shown in FIG. The first support member 20 includes support columns 21 and 22, a presser 23,
It has a holding ring 24 and a bearing 25.

The column 21 is fixed to the inner ring base 2 with bolts 26, and a concave portion 21a for supporting the column 22 is formed in the upper portion. The lower portion of the support 22 is supported by the concave portion 21 a of the support 21, and two bearings 25 are arranged between the support 22 and the inner ring 10. The presser 23 has a shaft portion 23a and a shaft portion 23a.
And a flange 23b formed on the top of
It is fixed to the upper part of the column 22 by a bolt 28.
The presser 23 is provided with a support ring 27 on the outer periphery of the shaft portion 23a.
Is attached. The grip ring 24 is disposed above and below the opening 10 a of the inner ring 10, and is supported by the support ring 27 by a bolt 29 attached to the support ring 27. The support ring 27 is provided with a supply amount adjusting means 70.
A step portion 27a around which a rubber belt 77 is wound is formed on the upper outer periphery with a supply roller 74 described later. Therefore, in the first support member 20, the two grip rings 2
4 and the support ring 27 are connected to the inner race 10 via the bearing 25.
At the same time, the support 22 rotates about the axis of the support 22.

On the other hand, the inner race base 2 is
And a rectangular base on which an outer ring base 3 described later is slidably mounted in the left-right direction indicated by an arrow A in FIG. As shown in FIGS. 1 to 4, level bolts 4 are attached to the four corners of the inner ring base 2, and the inner ring base 2 is adjusted to a horizontal state by these bolts 4. As shown in FIGS. 2 and 3, a lock nut 4a is attached to each level bolt 4, and the length of the level bolt 4 projecting downward can be arbitrarily fixed.

The first rotating means 30 connects the inner race 10 to the support 22
1, and is mounted on an outer ring base 3 to be described later. The first rotating means 30 has a motor 31, a speed reducer 32, and a pulley 33, and is mounted on the outer race base 3 by a bracket 34, as shown in FIGS. As shown in FIG. 7, the first rotating means 30 causes the rubber belt 35 attached to the pulley 33 to contact the inside of the inner ring 10 to transmit the torque of the motor 31 and rotate the inner ring 10.

As shown in FIG. 1, the outer ring 40 has its center of rotation CO (see FIG. 11) eccentric with respect to the center of rotation CI (see FIG. 11) of the inner ring 10, and its upper surface is at the same level as the upper surface of the inner ring 10. As shown in FIG. 1, a ring-shaped member arranged outside the inner race 10 forms a clearance S for component selection between the inner race 10 and the inner race 10. Therefore, the sorting device 1
Unlike a conventional sorting device using two long rollers, the sorting device sorts components using a gap S formed in the circumferential direction by the inner ring 10 and the outer ring 40. For this reason,
The sorting device 1 has a volume of 1 compared to the conventional sorting device.
/ 5, the area required for installation is 1/3. In addition, the sorting device 1 can easily perform a setup change in which the inner ring 10 and the outer ring 40 are replaced according to the size of a component to be sorted.

Here, a sorting chute 5 for sorting and discharging the selected components is disposed below the gap S. The sorting chute 5 has defective parts 5b and 5c formed on both sides of a non-defective part 5a located at a position corresponding to a non-defective zone ZG described later in the gap S, and is attached to the base 3. As is clear from the relationship with the gap S, the defective part 5b, 5c has a part whose maximum diameter is smaller than that of a non-defective part 5b, and the maximum part diameter of a non-defective part 5c is non-defective. The parts that deviate from the range are
Is discharged from

In the gap S, the rotational centers CI and CO of the inner ring 10 and the outer ring 40 are eccentric. Therefore, the gap S is
As shown in FIG. 1, the inner ring 10 is narrowest on the left side, gradually widens toward the right side, becomes widest on the right side,
Non-defective zone Z of parts sorted into left and right intermediate parts
G is formed. At this time, the non-defective zone ZG is calculated as follows.

First, the outer diameter of the inner ring 10 is set to DI,
Is the inner diameter of DO, the eccentricity of the inner and outer rings is δ, the target value of the maximum diameter of the parts to be sorted is DP, and the allowable range of good parts is DP.
+ T1 ≧ DP ≧ DP−T2, which are in mm units.
Also, regarding the clearance S for component selection formed between the inner ring 10 and the outer ring 40, the central angle from the minimum clearance position to the non-defective product minimum clearance position is θmin, and the central angle from the minimum clearance position to the non-defective product maximum clearance position is θmin. θmax, these are degrees
Unit.

Therefore, the minimum gap and the maximum gap of the gap S are expressed by the following equations. Minimum clearance = (DO−DI) / 2−δ Maximum clearance = (DO−DI) / 2 + δ Further, the difference between the maximum clearance and the minimum clearance is calculated from the above equation by the amount of eccentricity + δ of the outer ring base 3 to the plus side and minus. Since it is 2δ which is the sum of the amount of eccentricity to the side −δ, the variation H of the gap S per unit central angle is given by H = 2δ / 180.

Accordingly, the acceptable range of the sorted parts is given by the following equation. DP + T1 = (DO-DI) / 2 + δ + 2δ / 180 × θma
xDP-T2 = (DO-DI) /2-.delta.+2.delta./180.times..theta.mi
n From the above equation, the non-defective zone in which the component is selected as a non-defective product in the gap S from the non-defective product minimum gap position to the non-defective product maximum gap position has a center angle in a range from θmin to θmax given by the following expression.

Θmin = ｛DP-T2- (DO-DI) / 2 +
δ｝ × 180 / 2δ θmax = {DP + T1− (DO−DI) / 2 + δ} × 180
/ 2δ At this time, in order to improve the sorting accuracy of parts, first, the diameters of the inner ring 10 and the outer ring 40 are increased, and
Third, it is necessary to reduce the amount of eccentricity δ between the outer ring 40 and the inner ring 10 and the peripheral speed of the inner ring 10 and the outer ring 40.

Incidentally, the outer diameter DI of the inner ring 10 is 389.5.
mm, the inner diameter DO of the outer ring 40 = 400 mm, the eccentricity δ of the inner and outer rings = 3 mm, and the target value DP of the maximum diameter of the sorted parts =
7.25mm, T1 = 0.2 for acceptable range of sorted parts
Assuming that 5 mm and T2 = 0.25 mm, .theta.min = 142.5
Degree, θmax = 157.5 degrees, and the peripheral velocities of the inner ring 10 and the outer ring 40 at this time are respectively VI = 305.8 mm / se.
c, VO = 167.5 mm / sec.

The inner ring 10 and the outer ring 40 have various cross sections along the radial direction of the outer peripheral portion and the inner peripheral portion facing each other, depending on the shape of the component to be sorted. In the present invention,
Since a shaft part such as a screw or a spherical part such as a steel ball having a head and a shaft part and having different diameters along the axial direction is selected based on the maximum diameter part, the outer peripheral part of the inner ring 10 and the outer ring 40 are selected.
Is formed into a curved surface as shown in FIGS. 4, 6, 7, and 10. When the outer peripheral portion and the inner peripheral portion of the inner ring 10 and the outer ring 40 are formed in such a shape, for example, a gap S where the supplied screw is formed between the inner ring 10 and the outer ring 40 is formed.
10, the head H of the screw Sc comes into point contact with the outer peripheral portion and the inner peripheral portion as shown in FIG.
By the weight of the screw, the screw Sc has a proper posture suitable for sorting. When selecting parts such as screws, the outer peripheral portion of the inner ring 10 and the inner peripheral portion of the outer ring 40 are preferably formed as curved surfaces having a diameter of 1.5 to 3 times the thickness of the inner ring 10 so that the sorting effect is suitably exhibited. Is done. The outer peripheral portion of the inner ring 10 and the inner peripheral portion of the outer ring 40 have a curved surface having a diameter of 20 mm when the sorting device 1 sorts a screw having a head diameter of 10.5 mm, for example.

The second support member 50 is mounted on the outer race base 3 and rotatably supports the outer race 40. As shown in FIG. 1, three second support members 50 are provided around the outer race 40 at intervals of 120 degrees. I have. Each support member 50 has a column 51 and guide bearings 52 and 53, as shown in FIG. The support column 51 has a lower base 51a fixed to the outer ring base 3 by screws 51b, and a guide bearing 52
And a support bearing 53 are attached. The guide bearing 52 is a bearing for positioning the outer race 40 in the horizontal direction, and is attached to the upper portion of the support column 51 with a bolt 54. The support bearing 53 is a bearing that supports the outer ring 40, and the bolt 5 is provided below the guide bearing 52.
5, and rotatably supports the lower portion on the outer peripheral side of the outer ring 40.

As described above, since the outer ring 40 is supported at three points by the three second support members 50, it is supported in a very stable state. Here, the outer ring base 3 is shown in FIG.
And as shown in FIG. 3, placed on the inner ring base 2,
It is fixed to the inner ring base 2 by a fixing block 6 that guides sliding in the direction of arrow A. Here, the fixing block 6 is fixed to the upper surface on both sides of the inner ring base 2 by the fixing bolt 6a, and by loosening the adjusting bolt 6b,
The outer ring base 3 can be slid in the direction of arrow A in FIG.

The second rotating means 60 rotates the outer ring 40 in a counterclockwise direction indicated by an arrow in FIG. 1, and is provided on the outer ring base 3. The second rotating means 60 is provided in FIG.
As shown in FIGS. 2 and 3 and FIGS. 5 and 6, it has a motor 61, a speed reducer 62 and a pulley 63, and is installed on the outer race base 3 by a bracket 64. Second rotating means 60
As shown in FIG. 6, the rubber belt 65 attached to the pulley 63 is brought into contact with the inside of the outer ring 40 in the same manner as the first rotating means 30 to transmit the torque of the motor 61 and rotate the outer ring 40. .

At this time, in the sorting device 1, the outer race 4
0 is rotated in the same direction as the inner ring 10 as described above. At this time, the first speed is set so that the circumferential speed (VO mm / sec.) Of the outer ring 40 and the circumferential speed (VI mm / sec.) Of the inner ring 10 are different. And the second
Rotating means 30, 60 are adjusted. That is, as shown by the arrow in FIG. 1, the inner wheel 10 and the outer wheel 40 are driven by the motor 31 such that the peripheral speed (VI) of the inner wheel 10 is higher than the peripheral speed (VO) of the outer wheel 40 (VI> VO). , 61 is electrically adjusted to control the rotation speed. If the peripheral speeds of the inner race 10 and the outer race 40 are made different as described above, the components are conveyed in the gap S counterclockwise while rotating in the clockwise direction. Therefore, even if the maximum diameter portion of the selected component is partially missing or deformed into an elliptical shape or the like, such a component can be selected as a defective product.

The supply amount adjusting means 70 includes a supply chute 7
(See FIGS. 1 and 2) The adjustment is performed such that a large number of components supplied to the inner ring 10 by the predetermined amount are supplied to the gap S.
The supply amount adjusting means 70 includes a first arm 71, an adjusting roller 72, and a second arm 73, as shown in FIGS.
And a supply roller 74. The first arm 71
One end is fixedly supported by a bolt 28 above the presser 23 of the first support member 20, and the adjustment roller 72 is rotatably supported at the other end. An adjusting screw 75 for adjusting the interval between the rollers 72 and 74 is attached to the upper surface of the first arm 71. The adjusting roller 72 is arranged near the gap S as shown in FIG. 1, and adjusts such that a large number of components supplied on the inner ring 10 are supplied to the gap S by a predetermined amount. The adjustment roller 72 has a rubber belt 76 wound around the supply roller 74 and rotates together with the supply roller 74 in the direction indicated by the arrow in the figure. The second arm 73 has one end rotatably attached to the first arm 71 and the other end provided with a supply roller 74.
Are rotatably supported. The supply roller 74 is disposed radially inward of the adjustment roller 72 and offset toward the downstream side in the rotation direction of the inner ring 10. The supply roller 74 rotates together with the inner race 10 by two rubber belts 77 wound around the support ring 27 of the first support member 20. Therefore, in the supply amount adjusting means 70, the rotation of the motor 31 for rotating the inner ring 10 is transmitted to the rollers 72, 74 via the rubber belts 76, 77. Therefore, the adjustment roller 72 and the supply roller 74 always rotate at the preset increase / decrease ratio.

Here, the adjusting roller 72 and the supply roller 7
As shown in FIG. 9, knurls 4 are formed on the outer periphery of the lower part so as to increase friction with shaft parts such as screws. However, if the selected component is a spherical component such as a steel ball or a component with low friction, a rubber or the like having high friction may be attached to the surface instead of the knurl, or an appropriate groove may be provided between the knurls. To form

The adjusting screw 75 includes a main body 75a screwed to the upper surface of the first arm 71 and a screw 75b having an adjustable amount of protrusion from the main body 75a and having a tip abutting on a side surface of the second arm 73. And Therefore, the adjusting screw 7
5 adjusts the amount of protrusion toward the second arm 73 by turning the screw 75b, so that only the distal end of the second arm 73 is moved away from the first arm 71 while the first arm 71 is fixed. You can get closer. As a result, the adjusting screw 75 can arbitrarily adjust the angle between the arms 71 and 73, and accordingly the distance between the rollers 72 and 74.
At this time, the supply amount adjusting means 70 increases the supply amount of the component supplied to the gap S when the interval between the rollers 72 and 74 increases, and decreases the supply amount when the interval decreases.

Further, the adjusting roller 72 includes a supply roller 74.
The peripheral speed of the adjustment roller 72 is set to be higher than that of the supply roller 74 by using a roller having a diameter larger than the outer diameter of the roller. With this setting, it is possible to effectively prevent a component guided between the rollers 72 and 74 from being caught between the rollers 72 and 74 by a guide unit 80 described later.

The guiding means 80 is connected to the supply chute 7 (FIG. 1,
The plurality of parts supplied onto the inner race 10 are guided to the supply amount adjusting means 70 by utilizing the rotation of the inner race 10 and the supply amount of the parts supplied from the supply chute 7 is controlled (see FIG. 2). The guide means 80 is attached to the cover 8 which covers the inner ring 10 of the sorting device 1, and includes a movable guide 81 and a fixed guide 86 as shown in FIGS.

The movable guide 81 has a movable guide plate 82 and an angle sensor 83. The movable guide plate 82 is a plate that is curved so as to protrude outward.
3 is attached to the lower end of the rotating shaft 83b. The angle sensor 83 has a housing 83a attached to the upper surface of the cover 8 and a rotation shaft 83b, and is a sensor that detects the rotation angle of the rotation shaft 83b. For example, a rotation potentiometer, a photo sensor, a limit switch, or the like is used. You. As shown, the housing 83a and the rotating shaft 8
A spring 84 is mounted between the block 83c and the block 83c mounted on the upper end of the block 3b. The spring 84 urges the rotating shaft 83b and thus the movable guide plate 82 in a counterclockwise direction, as shown in FIG. Here, the angle sensor 83 outputs an angle signal corresponding to the detected rotation angle of the rotation shaft 83a to a supply unit (not shown) that supplies components to the supply chute 7. In the sorting device 1, the supply amount of the component to the supply chute 7, that is, the inner ring 10 is controlled based on the rotation angle of the rotation shaft 83a output from the angle sensor 83 to the supply unit.

On the other hand, the fixed guide 86 has a support member 87 and a fixed guide plate 88. Fixed guide plate 88
Has one end abutting on the end of the movable guide plate 82 and the other end supported by the support member 87. Here, the cover 8
As shown in FIGS. 1 and 3, a portion corresponding to the first arm 71 and the second arm 73 is cut away, and an opening 8 a is formed in a portion for supplying components from the supply chute 7 onto the inner ring 10.

The sorting apparatus 1 of the present invention is configured as described above, and has a head and a shaft by a sorting method described below.
Shaft parts such as screws having different diameters along the axial direction or spherical parts such as steel balls are selected based on the maximum diameter part. Here, in the following, in order to simplify the description,
The case of selecting screws will be described.

In the sorting apparatus 1, first, when a switch (not shown) is turned on, the inner ring 10 and the outer ring 40 start to rotate, and the supply chute 7 is opened using the opening 8a of the cover 8.
, A number of screws Sc are supplied onto the inner ring 10. next,
A large number of screws Sc supplied on the inner ring 10 are guided by the fixed guide plate 88 and the movable guide plate 82 of the guide means 80 and conveyed to the supply adjusting means 70 by the rotation of the inner ring 10 in the counterclockwise direction. You.

At this time, the movable guide plate 88 normally has its distal end at the position shown in FIG. 1 due to the urging force of the spring 84. However, when the supply amount of the screw Sc is large, for example, the rotating shaft is rotated in accordance with the supply amount. It moves counterclockwise around 83b. As a result, the angle sensor 83 outputs an angle signal corresponding to the rotation angle of the rotation shaft 83b to the above-mentioned supply unit (not shown). Thereby, if the threshold value of the angle signal is determined in advance, the supply unit can supply the screw S to be supplied to the supply chute 7.
The supply amount of c is controlled according to the angle signal, and a predetermined amount of screw Sc is always supplied to the supply chute 7.

Next, the large number of screws Sc transported to the supply adjusting means 70 are supplied to the adjusting roller 72 and the supply roller 74.
As is clear from the rotation direction of the inner ring 10, when it is on the outer peripheral side of the inner ring 10, it is conveyed in the backward direction by the adjusting roller 72, and when it is on the inner peripheral side, it is conveyed in the forward direction by the supply roller 74, Into the gap S. The screw Sc fed into the gap S in this way is shown in FIG.
As shown in (1), the head H comes into point contact with the outer peripheral portion and the inner peripheral portion of the inner ring 10 and the outer ring 40, and the self-weight of the screw Sc leads to a proper posture suitable for sorting.

Here, the screw Sc transported in the retreating direction by the adjusting roller 72 is pushed by the subsequent screw Sc because the inner ring 10 is rotating, and is transported again by the adjusting roller 72 or the supply roller 74. Eventually, it is fed into the nearby gap S. The adjustment roller 72 is
If the peripheral speed is lower than the supply roller 74, the possibility that the screw Sc is caught between the rollers 72 and 74 increases. However, since the sorting device 1 is set so that the peripheral speed of the adjustment roller 72 is higher than that of the supply roller 74, such a problem does not occur.

Further, in the sorting device 1, a rubber belt 76 is wound between the adjustment roller 72 and the supply roller 74. For this reason, if the screw Sc is provided between the rollers 72 and 74,
Even if the rollers 72 and 74 are sandwiched between them, if a load is applied, the gap between the rollers 72 and 74 is expanded, so that the screw Sc is easily removed and the rotation of the rollers 72 and 74 does not stop. And
The screw Sc fed into the gap S is formed between the inner ring 10 and the outer ring 40.
Of the head H, the inner ring 10 and the outer ring 40
While rotating in point contact with the outer and inner peripheral parts of
In a state of a correct posture suitable for sorting by its own weight, FIG.
As shown in (2), the sheet is conveyed to the non-defective zone ZG in the gap S.

As described above, in the sorting device 1 of the present invention, if the parts to be sorted are supplied onto the inner ring 10, the supplied parts are rotated by the inner ring 10, and supplied by the supply amount adjusting means 70 and the guiding means 80. Is sent into the gap S, and there is no need for an alignment device for pre-aligning the parts to be sorted.
Very easy to use. At this time, the screw Sc
If the maximum diameter of the head H is smaller than the acceptable range, the head H falls to the defective part 5b of the sorting chute 5 just before the acceptable zone ZG.

On the other hand, the screw Sc reaching the non-defective zone ZG
If the maximum diameter of the head H is within the acceptable range of the acceptable product, the head falls to the acceptable product portion 5a of the sorting chute 5. Furthermore, screw Sc
If the maximum diameter of the head H is larger than the acceptable range of the acceptable product, the transported screw Sc falls to the defective product portion 5c of the sorting chute 5. In the sorting device 1, the screw Sc is sorted based on the maximum diameter of the head H in this manner.

Here, in the above-described embodiment, for the sake of simplicity, a case has been described in which a screw Sc having a head H and a shaft portion and having different diameters along the axial direction is selected. However, it goes without saying that the sorting apparatus and the sorting method of the present invention can be used to sort spherical components such as steel balls.

[0044]

According to the first and ninth aspects of the invention, it is possible to provide a sorting apparatus and a sorting method which are compact, inexpensive and excellent in usability. In particular, according to the first and ninth aspects of the present invention, components are selected by using a gap formed between the inner ring and the outer ring. Therefore, according to the first and ninth aspects of the present invention, the volume of the sorting device is reduced to 1/5, compared with a conventional sorting device that sorts components using two long rollers.
The plane area required for installation can be reduced to 1/3, which is very convenient in downsizing the sorting device.
Further, the sorting device can easily change the inner ring and the outer ring according to the size of the component to be sorted, and the setup can be easily changed. Further, according to the first and ninth aspects of the present invention, if the parts to be sorted are supplied on the inner ring, the supplied parts are fed into the gap by the rotation of the inner ring, the guide means and the supply amount adjusting means, Since there is no need for an aligning device for aligning the parts to be sorted in advance, it is very easy to use.

At this time, according to the invention of claim 2, the first support member is installed on the first base, and according to the invention of claim 3, the second support member is mounted on the second base. It is mounted on a base, and the second base is slidable in the eccentric direction of the center of rotation of the outer ring with respect to the first base, so that the inner ring and the outer ring are eccentrically arranged. It is.

Further, according to the fourth aspect of the present invention, the second
And a fixing means for guiding the base in the sliding direction with respect to the first base and fixing the base to the first base, so that the eccentric operation of the inner ring and the outer ring is easy and the amount of eccentricity is desired. It is easy to fix to the value of. According to the invention of claim 5, since the inner ring and the outer ring form a curved cross section along the radial direction of the outer peripheral portion and the inner peripheral portion facing each other, the parts make point contact with the inner ring and the outer ring in the gap. , The correct posture suitable for sorting.

According to the sixth aspect of the present invention, the second
The outer ring is rotated at a different peripheral speed in the same direction as the inner ring, so that the part fed into the gap rotates, and the maximum diameter portion of the part is partially missing or deformed into an elliptical shape or the like. Even if it does, such a part can be sorted out as a defective product. Further, according to the invention of claim 7, the supply amount adjusting means includes: a first roller disposed in the vicinity of the gap; a radially inner side of the first roller and a downstream side of the inner ring in the rotation direction of the inner ring. The first roller has a larger diameter than the outer diameter of the second roller, so that the peripheral speed of the first roller is equal to the second roller. It can be set to be faster than the roller. For this reason, it is possible to effectively prevent a component guided between the first and second rollers by the guide unit from being caught between the two rollers.

According to the invention of claim 8, since the supply adjusting means is provided with the interval adjusting means for adjusting the interval between the first and second rollers, the interval between the first and second rollers can be arbitrarily adjusted. Therefore, the supply amount of the components supplied to the gap formed between the inner ring and the outer ring can be appropriately adjusted. According to the tenth aspect of the present invention, the shaft component or the spherical component is selected based on the maximum diameter portion, so that the component can be easily selected.

[Brief description of the drawings]

FIG. 1 is a plan view of a sorting device to which a sorting method of the present invention is applied.

FIG. 2 is a front view of the sorting device shown in FIG.

FIG. 3 is a right side view of the sorting device shown in FIG.

FIG. 4 is a cross-sectional view of the sorting device of FIG. 1 cut from the center of a first support member and viewed from the front.

FIG. 5 is a perspective view showing a second rotating unit.

FIG. 6 is a right side view showing the arrangement of the second rotating means and the outer ring in a cross section of the outer ring.

FIG. 7 is a front view showing the arrangement of the first rotating means and the inner ring in a cross section of the inner ring.

FIG. 8 is a plan view showing an arrangement of first and second rollers of the adjusting means.

FIG. 9 is a left side view showing the structure of the first and second rollers shown in FIG. 8 in a half section.

FIG. 10 is a cross-sectional view showing a relationship between a gap formed between an inner ring and an outer ring and components to be sorted.

FIG. 11 is a plan view showing a rotation center of an inner ring and a rotation center of an outer ring by enlarging a first support member.

FIG. 12 is a plan view showing selection of components by a gap formed between an inner ring and an outer ring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sorting device 2 Inner ring base (1st base) 3 Outer ring base (2nd base) 6 Fixed block 10 Inner ring 20 1st support member 30 1st rotation means 40 Outer ring 50 2nd support member 60 2nd rotation means 70 supply Amount adjusting means 72 Adjusting roller (first roller) 74 Supply roller (second roller) 75 Adjusting screw (interval adjusting means) 80 Guide means CI Center of rotation (of inner ring) CO Center of rotation (of outer ring) S Gap Sc Screw (Shaft parts) H Head

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuo Matsuda 4-17-3 Hanahata, Adachi-ku, Tokyo Inside Matsuda Works, Ltd.

Claims (10)

[Claims] 1. A sorting device for sorting a shaft part or a spherical part having a head and a shaft part and having different diameters along an axial direction, comprising: an inner ring having a center of rotation; A first support member for supporting; a first rotating means for rotating the inner ring; a rotation center eccentric to the rotation center of the inner ring disposed outside the inner ring; and the component selection between the inner ring and the inner ring. An outer ring forming a gap for use, a second support member for rotatably supporting the outer ring, a second rotating means for rotating the outer ring, a predetermined amount of the plurality of components supplied on the inner ring to the gap. A supply amount adjusting means for adjusting the supply so as to be supplied and a guide means for guiding the plurality of components supplied on the inner ring to the supply amount adjusting means using rotation of the inner ring. Sorting device. 2. The sorting device according to claim 1, wherein the first support member is provided on a first base. 3. The second support member is mounted on a second base, and the second base is slidable in an eccentric direction of a rotation center of the outer ring with respect to the first base. The sorting device according to claim 2. 4. The sorting device according to claim 3, further comprising fixing means for guiding the second base with respect to the first base in a sliding direction and fixing the second base to the first base. 5. The sorting device according to claim 1, wherein the inner race and the outer race have curved outer surfaces and inner surfaces each having a cross section along a radial direction. 6. The sorting device according to claim 1, wherein the second rotating means rotates the outer ring at a different peripheral speed in the same direction as the inner ring. 7. A supply amount adjusting means, comprising: a first roller disposed in the vicinity of the gap; and a second roller biased radially inward of the first roller and downstream of the inner ring in a rotation direction of the inner ring. The sorting device according to any one of claims 1 to 6, further comprising: 8. The supply adjusting means includes an interval adjusting means for adjusting an interval between the first and second rollers.
The sorting device according to claim 1. 9. A selecting method for selecting a shaft part or a spherical part having a head part and a shaft part and having different diameters along the axial direction, comprising: an inner ring and an outer ring whose rotation centers are slightly offset. Each of the shaft parts or the spherical parts is point-contacted between the inner ring and the outer ring in a gap formed between the inner ring and the outer ring, and is selected while rotating at a different peripheral speed in the same direction. Sorting method characterized by the following. 10. The method according to claim 9, wherein the shaft part or the spherical part is selected based on a maximum diameter portion.