JP3535530B2 - Vibration parts feeder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention illuminates electronic parts such as chip-shaped resistors and capacitors, and causes reflected light to enter a photoelectric conversion element. The present invention relates to a vibrating component feeder that determines the front and back of a component based on the presence / absence of an incident light amount, and aligns and conveys the front and back of the component. 2. Description of the Related Art For example, small electronic components such as chip resistors and capacitors externally attached to a plug-like integrated circuit have a glassy surface, a dark mirror-reflecting surface such as black and a white ceramic surface on the backside. Are formed on the irregularly-reflective surface, and the surface has a structural characteristic that the light reflectivity is good and the back surface has poor light reflectivity. When such electronic components are mounted at predetermined positions on an integrated circuit, or when the package is to be mounted side by side on a tape at regular intervals, it is necessary to sort the front surface and the back surface. And to do it correctly,
Parts sorting must be automated. Therefore, a vibrating component feeder that uses the above-described structural features of components to determine the front and back of the component using a photoelectric detector has been proposed, for example, in Japanese Patent Application Laid-Open No. 60-228318. [0005] In such a vibrating component feeder, it is necessary to enable the two types of discharging of the component, white or black, according to the customer's request. Depending on the degree of reflection of light on the surface of the component, it is necessary to replace the component with a corresponding color. In the above component aligning device, a notch is provided in the outer peripheral portion of the bowl so as to divide the transfer path of the bowl, and the transfer path of the bowl is fixed in the notch so as to be detachable. In addition to the above, a photoelectric detector for detecting components on the transfer path is arranged above the transfer path of the alignment block, and a mechanical or pneumatic elimination means is provided at a position close to the alignment block, and the bowl is configured. In the state where the parts move on the transfer path due to the vibration of, the surface of the part that has entered on the transfer path of the alignment block is detected by the photoelectric detector,
When the surface of the component is of the opposite color to the component to be removed, the removing means is activated, and the component is removed from the transfer path into the bowl, so that the component is removed in a uniform color with the surface of the component removed. I have. By the way, since the alignment block in the component aligning device is replaceably attached to the notch provided in the bowl, when the alignment block is attached to the bowl, the upstream and downstream divided by the notch of the transfer path formed in the bowl are connected. To complement and ensure that the movement of components from upstream to downstream is obtained without hindrance. [0008] Conventionally, the transfer path of the bowl has a simple arcuate shape having the same radius on the upstream and downstream sides separated by the notch, and this simple block is an alignment block fitted in the notch. In order to complement the arc-shaped transfer path, extremely high dimensional accuracy is required for the relationship between the upstream and downstream inlets and the alignment block of the bowl transfer path. If there is a part, it will not be able to move forward because the parts will be seized quickly. However, the transfer path in the bowl has a simple arc shape, and it is technically very difficult to cut out a part of the transfer path and supplement the arc with the alignment block, and to prevent the occurrence of a high step. There is a problem that you can not. Therefore, the present invention has confirmed that, even when various experiments are repeated, even if there is a step in the transfer path, if the step is small and the direction becomes lower in the moving direction of the parts, it cannot be replaced with the actual alignment. It is an object of the present invention to provide a vibrating component feeder capable of smoothly moving components within a range of processing accuracy of a bowl transfer path and an alignment block. [0011] In order to solve the above-mentioned problems, the present invention transfers a part on a transfer path provided in a bowl by vibration along the transfer path by vibration. This part consists of a dark specular reflection surface and the other surface is a diffused white reflection surface, and irradiates this part with light from the light-emitting element of the photoelectric detector, and detects whether the reflected light enters the light-receiving element of the photoelectric detector. And
By this detection , the rejection means in the parts front and back aligning device provided in the middle of the transfer path of the bowl is operated to select the front and back of the parts. A notch for fitting and fixing the alignment block is provided so as to divide the transfer path of the bowl with the notch, and the portion cut by the notch of the transfer path is inserted into the notch.
Complement with the mating and fixed alignment block, set on the bowl
Facing the alignment block of the part cut by the notch of the transfer path
For the upstream outlet and the downstream inlet, and for the upstream outlet
The entrance on the downstream side is a small
A step is provided to complement the part cut by the notch in the transfer path
The vertical wall surface and the bottom surface of the alignment block have a dimensional relationship that fits within the range of the step. The alignment block to be fitted into the cutout provided in the bowl is manufactured to have a regular size, and is fixed in the cutout. Since the downstream inlet is formed with a small step in the downward direction, even if a step occurs between the bowl transfer path and the transfer path of the alignment block, the step becomes lower in the component flow direction. The parts can be smoothly moved without the parts being used. Embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 and 2 show the overall structure of a vibrating component feeder, in which a spiral transfer path 2 is formed in a bowl 1, and this bowl 1 is, as is well known, a movable core, a leaf spring, an electromagnet and the like. A torsional vibration force is applied by a vibration driving structure comprising: and a rectangular plate-like component A such as a chip-shaped resistor or a capacitor is aligned. Referring to FIG. 1, a bowl 1 has a component removing device 3 located substantially in the middle of the transfer path 2 from the upstream side to the downstream side of the spiral transfer path 2, and about one turn from the removal apparatus 3. Connecting transfer path 4 at a position on the downstream side, an aligning transfer path 5 connected to the downstream side of the connecting transfer path 4, a first component front and back alignment device 6 and a second component front and back alignment device 7 according to the present invention.
In addition, a component attitude holding transfer path 8 is provided, a component return portion 9 is provided outside the alignment transfer path 5 and a return path 10 is provided inside, and a plurality of arc-shaped notches 11 are provided in the spiral transfer path 2. Is formed. The transfer path 2 of the bowl 1 and the communication transfer path 4,
As shown in FIGS. 3 and 4, the alignment transfer path 5 and the posture holding transfer path 8 form a runway with a vertical wall and a bottom wall inclined at an angle of 75 ° with respect to the wall. A supported by
Is designed to pass without contacting the corners of the runway, and the cross-sectional shape of such a runway does not require extremely tight shape precision in the processing of the runway, and the holding of the part A is good, and This has the advantage that the stability of the microchip resistor is also high, which is an important factor especially for the conveyance of the micro chip resistor. As shown in FIGS. 1 to 7, the first component obverse and reverse aligning device 6 is provided with a rectangular notch 12 at an upper position on the outer periphery of the bowl 1 so as to divide the alignment transfer path 5, and
The lower part of 2 is a right-angled saddle part 13, and an alignment block 14 is removably fitted in the notch 12. The alignment block 14 has an inverted L-shape with a fitting portion 15 which fits into the notch 12 without looseness and a contact portion 16 with the outer surface of the bowl provided continuously below the outside. The alignment block 14 is formed in a yoke shape with a notch 17 provided at the lower surface of the 15 to the contact portion 16 so as to be opened at the lower surface, and a component removing means 18 described later is accommodated in the notch 17. . The side wall surface of the alignment block 14 facing the inside of the bowl 1 is formed in substantially the same arc shape as the side wall surface forming the alignment transfer path 5 of the bowl 1, and the side wall surface is formed by a notch 12. A transfer path 19 is provided to complement the upstream and downstream of the divided alignment transfer path 5 in a connected state, and this transfer path 19 also forms a runway with a vertical wall and a bottom wall inclined at an angle of 75 ° with respect to the vertical wall. are doing. The alignment transfer path 5 and the transfer path 19 of the alignment block 14 are designed to be horizontal with concentric circles around the axis of the bowl 1 so that the component A can be transferred as smoothly and as quickly as possible. When the width of the alignment block 14 is set short, the inner wall and the transfer path 19 may be formed in a straight line. In order to removably fix the alignment block 14 to the bowl 1, an inclined surface 20 which is obliquely cut is provided at an outer corner of the alignment block 14.
The two ends of the pressing plate 21 abutted against the
Is to be fixed to. As shown in FIG. 6, the pressing plate 21 is formed in a mountain shape in which the contact surface with the inclined surface 20 is higher at the center.
The center of the inclined surface 20 of the alignment block 14 is pressed, and the push plate 21 has a round hole 2 through which a screw 22 is inserted at one end.
3 is provided, and the other end is provided with a cut-out portion
Are provided, and a notch 1 is provided on the outer peripheral portion of the bowl 1.
Screw holes 25 into which screws 22 are screwed are provided at both sides sandwiching the screw 2. The holding plate 21 presses the inclined surface 20 of the alignment block 14 by screwing the screws 22 at both ends into the screw holes 25, thereby fixing the alignment block 14 in the notch 12 and attaching the alignment block 14. When removing, both screws 22 should be loosened slightly, and the holding plate 21 should be turned around the screw 22 of the round hole 23 in the direction in which the notch 24 separates from the screw 22. By performing the reverse operation, the replacement operation of the alignment block 14 can be performed easily and speedily. When the alignment block 14 is fixed to the bowl 1, the width direction of the alignment block 14 is fixed by both sides of the notch 12. The inward and outward fixing of the bowl 1 can be performed simultaneously at one place, and the inverted L-shaped alignment block 14 is pressed and fixed obliquely to the saddle portion 13 of the bowl 1 formed at a right angle, thereby fixing the inner wall of the bowl 1 to the inner wall. During this time, highly accurate fixing can be reproduced without skill, and the transfer of the part A is not hindered. In addition, the width direction of the alignment block 14 is tightly fitted to both sides of the notch 12 provided in the bowl 1 with a large area of abutting portion, and withstands a large vibration acceleration due to the high frequency vibration of the bowl 1. To a fixed state. The transfer path 19 in the alignment block 14
As shown in FIG. 3, a photoelectric detector 26 for detecting the front and back of the component A passing through the transfer path 19 is disposed in the center and obliquely above, and irradiates the component A with light from the light projecting element. Then, it is detected whether or not the reflected light is incident on the light receiving element, and the component elimination means 18 is operated by this detection. As the elimination means 18, a voice coil type actuator of a mechanical pusher type is used.
This actuator causes an electric current to flow through a control electronic circuit in accordance with an output signal of the photoelectric detector 26 to a coil disposed in a magnetic field gap, and reciprocates a pusher by utilizing repulsion of a magnetic field formed at that time. And has the agility to easily respond to the high-speed movement of the part A. The elimination means 18 is arranged such that the distal end thereof is accommodated in the concave notch 17 of the alignment block 14 and the pin 27 attached to the distal end of the pusher is connected to the vertical wall of the transfer path 19 of the alignment block 14 as shown in FIG. It faces the hole 28 provided, protrudes from the hole 28 onto the transfer 19 at the time of forward movement, and the component A is dropped from the transfer path 19 into the return path 10 provided in the bowl 1,
At the time of retreat, it waits behind the transfer path 19,
The movement of the part A along the line is not hindered. Therefore, when replacing the alignment block 14,
The elimination means 18 is left as it is, and the alignment block 14
Only can be replaced. The alignment block 14 has two types, one having a dark glossy surface such as black or the like and one having a white and irregular reflection surface such as aluminum or the like. It is designed to be replaced according to the degree of reflection. That is, the component A is an electronic component in which one surface is a dark specular reflection surface such as black and the other surface is a white irregular reflection surface. When the component A is taken out with the black side up, a black alignment block is used. On the contrary, when taking out the part A with the white color facing upward, a white alignment block is used. In this way, the component A to be eliminated by the exclusion means 18 by detecting the surface with the photoelectric detector 26
The upper surface and the color of the transfer path 19 of the alignment block greatly differ, and the detection accuracy of the rejected component by the photoelectric detector 26 is greatly improved. In the bowl 1, as shown in FIG.
An alignment transfer path 5 formed on the inner periphery thereof has a notch 12 for mounting an alignment block 14 of the first component front and back alignment device 6.
The upstream transfer path 5a and the downstream transfer path 5b of the alignment block 14 are connected and supplemented by the transfer path 19 of the alignment block 14 fitted into the cutout 12 and fitted to the notch 12. [0034] In formation of the transfer path 5 to the bowl 1, the inlet of the downstream transport path 5b ₁ relative to the outlet 5a ₁ of the upstream transport path 5a is the direction in which both of the vertical wall surface and the bottom surface down both small It is formed with various steps. FIG. 12 is an enlarged view showing the relationship between the upstream transfer path 5a and the downstream transfer path 5b.
Is about 0.05 mm for both the vertical wall surface and the bottom surface. With respect to the provision of the step H between the upstream transfer path 5a and the downstream transfer path 5b, as shown in FIG. 12, the dimension of the alignment block 14 mounted in the notch 12 is maintained at a regular right angle. The vertical inner peripheral wall and the bottom wall are manufactured so as to have a dimensional relationship within the range of the step H. Thus, the alignment block 14 is cut into the notch 12
If fitted within, and the transfer path 19 of the outlet 5a ₁ and alignment block 14 of the upstream-side flow path 5a, if the level difference and inlet 5b ₁ of the transfer path 14 and the downstream transport path 5b of the alignment block occurs, the The step is always lower in the moving direction of the part A, and there is no possibility that the movement of the part A can be stopped. Further, by adopting such a structure, it can be manufactured with the simplest, high accuracy and easy. There are advantages. Next, the second parts front and back aligning device 7 eliminates the case where a different color component is mixed in the parts to be taken out in the first parts front and back aligning device 6 described above. It is provided in order to improve the reliability, and is substantially the same as the first component front and back aligning device 6 except that the pneumatic type is used for the elimination means 29. Substitute. As shown in FIGS. 8 and 9, the alignment block 31 fitted and mounted in the notch 30 of the bowl 1 is formed in an inverted L-shape, and the alignment transfer path 5 is formed on the inner side wall facing the bowl 1.
And a small-diameter air outlet hole in which the tip of an air passage 33 provided from the outer surface side to the inner surface side is opened at the vertical wall surface of the transfer path 32 at the center of the alignment block 14. 34. As shown in FIGS. 1 and 2, this alignment block 31 is detachably fixed to the bowl 1 by the same means as the first component front and back alignment device 6, and has a dark glossy surface. And white and irregularly-reflective surfaces are prepared, and the components to be selected are selected and used under the same conditions as the alignment block 14 of the first component front and back alignment device 6. The air-type exclusion means 29 is configured to blow air from an air supply source from a small-diameter nozzle 35 at the end by opening and closing a valve mechanism. It faces close to the outer surface opening of the passage 33, and opens when the photoelectric detector 26 detects a different color component, supplies air to the air passage 33, and moves the component A on the transfer path 32 by air ejected from the air outlet 34. From inside the return path 10. Incidentally, in the first and second component front and back aligning devices 6 and 7, the aligning block 1 with the return path 10 interposed therebetween.
4 and 8, component dropping guides 36 and 37 are attached so that the component A can surely fall from the transfer paths 19 and 32 into the return path 10 as shown in FIGS. . In the second component front and back aligning device 7,
The relationship between the alignment block 31 fitted into the notch 30 and the upstream outlet and the downstream inlet of the transfer path 5 divided by the notch 30 is such that a minute step is formed under the same conditions as in the case of the first component front and back alignment device 6. It is provided and formed. The vibrating component feeder of the present invention has the above-described configuration, and the operation will be described next. When a known torsional vibration force is applied to the bowl 1 into which a large number of parts A have been put, a spiral transfer path 2 is thereby provided.
Are transported along, the multi-row components A are cut into one row by the notch 11, and move to the downstream side. When the end of the transfer path 2 reaches the communication transfer path 4, the cross-sectional shape of the transfer path 4 acts, so that most of the parts A are oriented in the transfer direction after passing through the connection transfer path 4, In this state, it is led to the alignment transfer path 5, and the alignment transfer path 5 is, as shown in FIG.
Since the runway is formed by the vertical wall and the inclined bottom wall, the vehicle slides on the inclined bottom wall in a single-layer single-row state with the front or back face up. When the component A is to be taken out with the white surface facing upward, the first component front-back alignment device 6 and the second component front-back alignment device 7 use the alignment blocks 14 and 31 having a white irregular reflection surface. Part A moving downstream on the alignment transfer path 5
Is the alignment block 1 in the first component front and back alignment device 6.
4 is moved onto the transfer path 19 of FIG.
When the surface of the component A is a white surface, the discharging means 18 does not operate, and the component A passes through the transfer path 19 and moves downstream. Conversely, the component A having a black surface is the alignment block 1
4, the discharging means 18 is activated by the detection of black by the light emission of the photoelectric detector 26, and the component A is pushed down from the transfer path 19 to the return path 10. As described above, the first parts front and back aligning device 6
When a component A having a black surface enters, the component A having a white surface is pushed down when the component A enters, so that only the component A having a white surface proceeds in series on the downstream side of the alignment transfer path 5. Part A then passes through a second part front and back alignment device 7. When the component A having a black surface enters the transfer path 32 of the alignment block 31, the second component front and back aligning device 7 detects the photoelectric detector 26 and removes the component 29.
Is operated, and the component A is blown down from the transfer path 28 into the return path 10 by the air blown out from the air blowout hole 28. The first component obverse and reverse aligning device 6 includes
Since a mechanical pusher type voice coil type actuator is used for 8, the response is good and the parts A passing at high speed can be reliably eliminated by sorting.
Although it is possible to prevent the different color components from passing downstream, there is a second component front / back aligning device 7 to eliminate any mixing of the different color components, so that the second component front / back aligning device 7 is eliminated. The number of operations of the means 29 is extremely smaller than that of the first component front and back aligning device 6, and the means 29 can sufficiently cope with the sorting even if an air-type mechanism is used. The component A, which has passed through the second component front / back aligning device 7, advances from the alignment transfer path 5 to the part attitude holding transfer path 8, and is in a single-layer single-row state with the white surface facing upward. From the take-out side end, it is transferred to a linear feeder (not shown). Although the case where the component A is taken out with the white surface facing upward is taken as an example, when taking out the component with the black surface facing upward, the first and second component front / back aligning devices 6 and 7 are arranged. The blocks 14 and 31 may be replaced with those having a dark specular reflection surface, and the photoelectric detectors 26 and 26 may be set so as to operate the elimination means 18 and 29 by detecting the white portion, thereby eliminating this. . As described above, according to the present invention, in the middle of the transfer path provided on the inner periphery of the bowl, the upstream exit and the downstream entrance divided by the alignment block of the alignment device have the upstream side. Since a small step is provided in the direction going down to the downstream inlet with respect to the side outlet, if the alignment block is manufactured with a regular dimensional angle, between the outlet and the inlet of the upstream and downstream transfer paths and the alignment block. When a step is generated, the step always becomes lower in the moving direction of the parts, whereby the parts can be smoothly moved along the transfer path, and the front and back alignment can be performed without any trouble.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a vibration component feeder according to the present invention; FIG. 2 is a front view of the same; FIG. FIG. 5 is an exploded perspective view showing the structure of the main part of the same. FIG. 6 is an exploded perspective view showing the fixing structure of the alignment block in the same embodiment. FIG. Rear view showing the inner surface side. FIG. 8 is a longitudinal sectional view showing a second parts front and back aligning device. FIG. 9A is an enlarged sectional view of an alignment block used in the same, and FIG. Rear view [FIG. 10] A perspective view showing the relationship between the transfer path of the bowl and the notch [FIG. 11] A plan view with an alignment block mounted thereon [FIG. 12] An enlarged cross-sectional view along the arrow XX in FIG. Explanation] 1 Bowl 2 Transfer path 3 Parts removal device 4 Communication transfer path 5 Alignment transfer path 5a Side transfer path 5b Downstream transfer path 6 First component front and back alignment device 7 Second component front and back alignment device 8 Component attitude holding transfer path 9 Return section 10 Return path 12 Notch 13 Saddle section 14 Alignment block 18 Excluding means 19 Transfer path 20 Inclined surface 21 Push plate 22 Screw 25 Screw hole 29 Elimination means 30 Notch 31 Alignment block 32 Transfer path 34 Air outlet A part

Claims (1)

(57) [Claims 1] A component on a transfer path provided in a bowl is transferred along the transfer path by vibration, and the part has a dark specular reflection surface on one side and a diffuse reflection surface on the other side. Irradiates this part with light from the light emitting element of the photoelectric detector, and detects whether or not the reflected light is incident on the light receiving element of the photoelectric detector. In the vibrating component feeder which operates the elimination means in the component front and back aligning device provided in the above and sorts the front and back of the component, a notch for fitting and fixing the alignment block of the component front and back aligning device is provided on the outer periphery of the bowl. , provided so as to divide the transfer path of the bowl in the cutout, the divided portions in the notch of the transfer path
It is complemented by the alignment block fitted and fixed in the notch, and the part divided by the notch in the transfer path provided in the bowl is aligned.
The upstream exit and downstream entrance facing the row block
The inlet on the downstream side has a vertical wall and the bottom on both sides.
A small step in the downward direction is provided, and cut by the notch in the transfer path
A vibrating component feeder, characterized in that the vertical wall surface and the bottom surface of the alignment block have a dimensional relationship that fits within the range of the step, which complements the set portion .